WO2023066263A1

WO2023066263A1 - First electrode sheet, bare battery cell, battery, and electronic device

Info

Publication number: WO2023066263A1
Application number: PCT/CN2022/126001
Authority: WO
Inventors: 田雷雷; 宋晓娜; 吴仪岚; 李枝贤; 谢封超; 任雪斌
Original assignee: 华为技术有限公司
Priority date: 2021-10-20
Filing date: 2022-10-18
Publication date: 2023-04-27
Also published as: CN115995562A

Abstract

Provided in the present application are a first electrode sheet, a bare battery cell, a battery, and an electronic device. The first electrode sheet comprises a current collector, a first active coating, a second active coating and a tab. The current collector comprises an insulating layer, a first conductive layer, and a second conductive layer. The insulating layer is located between the first conductive layer and the second conductive layer. The current collector comprises a coating portion and a non-coating portion. The first active coating is located on the first conductive layer of the coating portion. The second active coating is located on the second conductive layer of the coating portion. The non-coating portion comprises a bent portion and a flat portion. The first conductive layer at a second end of the bent portion and the second conductive layer of the flat portion face the same side. The tab is electrically connected to the first conductive layer at the second end of the bent portion and the second conductive layer of the flat portion. In this way, the first active coating and the second active coating can be electrically connected to the tab at the same time. When the first electrode sheet is applied to a battery, the first electrode sheet is unlikely to affect the capacity exertion and safety performance of the battery.

Description

第一电极片、裸电芯、电池以及电子设备First electrode sheet, bare cell, battery and electronic equipment

本申请要求于2021年10月20日提交中国专利局、申请号为202111223633.5、申请名称为“第一电极片、裸电芯、电池以及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application with the application number 202111223633.5 and the application name "the first electrode sheet, bare cell, battery and electronic equipment" submitted to the China Patent Office on October 20, 2021, the entire content of which is passed References are incorporated in this application.

技术领域technical field

本申请涉及电池技术领域，尤其涉及一种第一电极片、裸电芯、电池以及电子设备。The present application relates to the field of battery technology, and in particular to a first electrode sheet, a bare battery cell, a battery and electronic equipment.

背景技术Background technique

随着移动终端设备和电动汽车应用领域快速发展，锂离子电池对能量密度和安全性能的要求日趋提高。关键材料轻量化，开发轻量化替代的电池技术，是提升电池能量密度的重要路径。复合集流体，特别是使用表面导电的聚合物基复合膜，替代电池中传统的金属铜箔、铝箔作为阴、阳电极的集流体，具有轻量化和安全防护的显著意义。With the rapid development of mobile terminal equipment and electric vehicle applications, the requirements for energy density and safety performance of lithium-ion batteries are increasing day by day. Lightweight key materials and the development of lightweight alternative battery technologies are important ways to increase battery energy density. Composite current collectors, especially the use of surface conductive polymer-based composite films, replace traditional metal copper foil and aluminum foil in batteries as current collectors for cathode and anode electrodes, which has significant significance for weight reduction and safety protection.

请参阅图1a,图1a是传统的电极片9a的剖面示意图。电极片9a的复合集流体91a包括绝缘层911a、第一导电层912a以及第二导电层913a。绝缘层911a连接于第一导电层912a和第二导电层913a之间。复合集流体91a包括涂层区914a和空箔区915a。电极片9a的第一活性涂层92a层叠于涂层区914a的第一导电层9122a。电极片9a的第二活性涂层93a层叠于涂层区914a的第二导电层9132a。另外，电极片9a的极耳94a与空箔区915a的第一导电层9121a焊接。这样，虽然第一活性涂层92a可以经第一导电层912a与极耳94a电连接，但第二活性涂层93a却由于绝缘层911a阻隔而很难通过第二导电层913a与极耳94a电连接，导致第二活性涂层93a处于不工作状态。此外，即使第二活性涂层93a通过穿刺过孔等方式与第二导电层913a电连接，从而通过第二导电层913a与极耳94a电连接，但电池也会出现高阻态问题，影响电池的容量发挥和安全性能。Please refer to FIG. 1a. FIG. 1a is a schematic cross-sectional view of a conventional electrode sheet 9a. The composite current collector 91a of the electrode sheet 9a includes an insulating layer 911a, a first conductive layer 912a and a second conductive layer 913a. The insulating layer 911a is connected between the first conductive layer 912a and the second conductive layer 913a. The composite current collector 91a includes a coated region 914a and an empty foil region 915a. The first active coating 92a of the electrode sheet 9a is laminated on the first conductive layer 9122a of the coating area 914a. The second active coating 93a of the electrode sheet 9a is laminated on the second conductive layer 9132a of the coating area 914a. In addition, the tab 94a of the electrode sheet 9a is welded to the first conductive layer 9121a of the empty foil area 915a. In this way, although the first active coating 92a can be electrically connected to the tab 94a through the first conductive layer 912a, the second active coating 93a is difficult to electrically connect to the tab 94a through the second conductive layer 913a due to the barrier of the insulating layer 911a. connected, causing the second active coating 93a to be in a non-working state. In addition, even if the second active coating 93a is electrically connected to the second conductive layer 913a by piercing through holes, etc., thereby electrically connecting to the tab 94a through the second conductive layer 913a, the battery will still have a high resistance state problem, which will affect the battery life. Capacity play and safety performance.

发明内容Contents of the invention

本申请提供一种第一电极片、裸电芯、电池以及电子设备，可以使得双面活性涂层同时电连接于极耳。The present application provides a first electrode sheet, a bare battery cell, a battery and an electronic device, which can make double-sided active coatings electrically connected to tabs at the same time.

第一方面，本申请实施例提供一种第一电极片。第一电极片包括集流体、第一活性涂层、第二活性涂层以及极耳。从第一方向看，集流体包括绝缘层、第一导电层以及第二导电层。绝缘层位于第一导电层和第二导电层之间。从第二方向看，集流体包括涂层部以及连接涂层部的非涂层部。第一活性涂层位于涂层部的第一导电层。第二活性涂层位于涂层部的第二导电层。第一方向和第二方向不同。In a first aspect, the embodiment of the present application provides a first electrode sheet. The first electrode sheet includes a current collector, a first active coating, a second active coating and tabs. Viewed from a first direction, the current collector includes an insulating layer, a first conductive layer and a second conductive layer. The insulating layer is located between the first conductive layer and the second conductive layer. Viewed from the second direction, the current collector includes a coated portion and a non-coated portion connected to the coated portion. The first active coating is located on the first conductive layer of the coating portion. A second active coating is located on the second conductive layer of the coating portion. The first direction and the second direction are different.

非涂层部包括弯折部分以及连接弯折部分的平坦部分。平坦部的第一端与涂层部连接。平坦部的第二端与弯折部分的第一端连接。弯折部分的第二端的第一导电层与平坦部分的第二导电层朝向同一侧。极耳电连接于弯折部分的第二端的第一导电层和平坦部分的第二导电层。The non-coating portion includes a bent portion and a flat portion connecting the bent portion. The first end of the flat part is connected with the coating part. The second end of the flat portion is connected to the first end of the bent portion. The first conductive layer at the second end of the bent portion faces the same side as the second conductive layer at the flat portion. The tab is electrically connected to the first conductive layer at the second end of the bent portion and the second conductive layer at the flat portion.

可以理解的是，本实施方式通过将集流体的非涂层部的部分设置成弯折部分，以使弯折部分的第二端的第一导电层与平坦部分的第二导电层朝向同一侧。另外，通过将极耳电连接于弯折部分的第二端的第一导电层和平坦部分的第二导电层，从而使得极耳可以同时电连接集流体的第一导电层与第二导电层。这样，当第一电极片应用于电池时，第一活性涂层和第二活性涂层均可以实现导通，从而避免第一活性涂层和第二活性涂层中的一个因不工作而导致电池的容量的损失。另外，相较于第二活性涂层通过穿刺过孔等方式与极耳电连接的方案，本申请的电池不容易出现高阻态问题，不会影响电池的容量发挥和安全性能。It can be understood that in this embodiment, the non-coated part of the current collector is set as a bent part, so that the first conductive layer at the second end of the bent part and the second conductive layer of the flat part face to the same side. In addition, by electrically connecting the tab to the first conductive layer at the second end of the bent portion and the second conductive layer at the flat portion, the tab can be electrically connected to the first conductive layer and the second conductive layer of the current collector at the same time. In this way, when the first electrode sheet is applied to the battery, both the first active coating and the second active coating can realize conduction, thereby avoiding the failure of one of the first active coating and the second active coating to cause loss of battery capacity. In addition, compared with the scheme in which the second active coating is electrically connected to the tabs by puncturing through holes, the battery of the present application is not prone to high-resistance problems, and will not affect the capacity and safety performance of the battery.

在一种可能实现的方式中，弯折部分的第一导电层包括第一段以及第二段。弯折部分的第一导电层的第一段连接弯折部分的第一导电层的第二段与平坦部分的第二端的第一导电层之间。弯折部分的第一导电层的第二段与平坦部分的第一导电层相对设置。可以理解的是，弯折部分的第一导电层的结构较为简单，工艺更加容易实现。In a possible implementation manner, the first conductive layer of the bent portion includes a first segment and a second segment. The first segment of the first conductive layer of the bent part is connected between the second segment of the first conductive layer of the bent part and the first conductive layer of the second end of the flat part. The second segment of the first conductive layer in the bent portion is opposite to the first conductive layer in the flat portion. It can be understood that the structure of the first conductive layer of the bent part is relatively simple, and the process is easier to implement.

在一种可能实现的方式中，弯折部分在基准面投影的面积小于平坦部分在基准面的投影的面积，基准面为涂层部所在平面。In a possible implementation manner, the projected area of the bent part on the reference plane is smaller than the projected area of the flat part on the reference plane, and the reference plane is the plane where the coating part is located.

在一种可能实现的方式中，在集流体的宽度方向上，弯折部分的尺寸小于平坦部分的尺寸。In a possible implementation manner, in the width direction of the current collector, the size of the bent portion is smaller than the size of the flat portion.

在一种可能实现的方式中，极耳与弯折部分的第二端的第一导电层的连接位置为第一位置。极耳与平坦部分的第二导电层的连接位置为第二位置。第一位置与第二位置的排布方向平行于集流体的宽度方向。In a possible implementation manner, the connection position between the tab and the first conductive layer at the second end of the bent portion is the first position. The connection position of the tab and the second conductive layer of the flat part is the second position. The arrangement direction of the first position and the second position is parallel to the width direction of the current collector.

可以理解的是，通过将第一位置与第二位置的排布方向平行于集流体的宽度方向设置时，非涂层部在集流体的长度方向上的尺寸可以不用提供较大的尺寸来与极耳固定，也即非涂层部在集流体的长度方向上的尺寸可以较大程度地减小。此时，涂层部在集流体的长度方向上的尺寸可以较大程度地提高，也即第一活性涂层和第二活性涂层在集流体的长度方向上的尺寸可以较大程度地提高。这样，当第一电极片应用于电池时，有利于提高的电池的容量。It can be understood that, by arranging the arrangement direction of the first position and the second position parallel to the width direction of the current collector, the size of the non-coating part in the length direction of the current collector does not need to provide a larger size to match that of the current collector. The tab is fixed, that is, the size of the non-coating portion in the length direction of the current collector can be reduced to a large extent. At this time, the size of the coating part in the length direction of the current collector can be increased to a large extent, that is, the dimensions of the first active coating layer and the second active coating layer in the length direction of the current collector can be increased to a large extent. . In this way, when the first electrode sheet is applied to a battery, it is beneficial to increase the capacity of the battery.

在一种可能实现的方式中，在集流体的宽度方向上，弯折部分的尺寸等于平坦部分的尺寸。In a possible implementation manner, in the width direction of the current collector, the size of the bent portion is equal to the size of the flat portion.

可以理解的是，由于在集流体的宽度方向上，弯折部分的尺寸等于平坦部分的尺寸，本实施方式的非涂层部不用再通过额外的裁剪工艺来减小弯折部分在集流体的宽度方向上的尺寸。这样，本实施方式的第一电极片在工艺成本上可以减小投入。It can be understood that since the size of the bent portion is equal to the size of the flat portion in the width direction of the current collector, the non-coated part of this embodiment does not need to use an additional cutting process to reduce the gap between the bent portion and the current collector. Dimensions in the width direction. In this way, the first electrode sheet in this embodiment can reduce the investment in process cost.

在一种可能实现的方式中，弯折部分层叠于平坦部分。弯折部分的第二端的第二导电层与平坦部分的第二导电层接触。In a possible implementation manner, the bent portion is stacked on the flat portion. The second conductive layer at the second end of the bent portion is in contact with the second conductive layer of the flat portion.

在一种可能实现的方式中，非涂层部连接于涂层部的端部或者中部。In a possible implementation manner, the non-coated part is connected to an end or a middle part of the coated part.

在一种可能实现的方式中，极耳的材质包括镍、铜、铝、铜镀镍、不锈钢、铝合金、铜铝复合带、涂有碳层的金属带中的一种或多种；或，集流体的第一导电层的材质包括铜、铝、钛、不锈钢、金属合金、碳、石墨中的一种或多种。In a possible implementation manner, the material of the tab includes one or more of nickel, copper, aluminum, nickel-plated copper, stainless steel, aluminum alloy, copper-aluminum composite strip, and metal strip coated with carbon layer; or , the material of the first conductive layer of the current collector includes one or more of copper, aluminum, titanium, stainless steel, metal alloy, carbon, and graphite.

第二方面，本申请实施例提供一种第一电极片。第一电极片包括集流体、第一活性涂层、第二活性涂层以及极耳。从第一方向看，集流体包括绝缘层、第一导电层以及第二导电层。绝缘层位于第一导电层和第二导电层之间。从第二方向看，集流体包括涂层部以及连接涂层部的非涂层部。第一活性涂层位于涂层部的第一导电层。第二活性涂层位于涂层部的第二导电层。第一方向和第二方向不同。In a second aspect, the embodiment of the present application provides a first electrode sheet. The first electrode sheet includes a current collector, a first active coating, a second active coating and tabs. Viewed from a first direction, the current collector includes an insulating layer, a first conductive layer and a second conductive layer. The insulating layer is located between the first conductive layer and the second conductive layer. Viewed from the second direction, the current collector includes a coated portion and a non-coated portion connected to the coated portion. The first active coating is located on the first conductive layer of the coating portion. A second active coating is located on the second conductive layer of the coating portion. The first direction and the second direction are different.

非涂层部包括弯折部分以及连接弯折部分的平坦部分。平坦部的第一端与涂层部连接。平坦部的第二端与弯折部分的第一端连接。弯折部分的第二端的第一导电层与平坦部分的第二导电层相邻且相对设置。极耳电连接于弯折部分的第二端的第一导电层和平坦部分的第二导电层。The non-coating portion includes a bent portion and a flat portion connecting the bent portion. The first end of the flat part is connected with the coating part. The second end of the flat portion is connected to the first end of the bent portion. The first conductive layer at the second end of the bent portion is adjacent to and opposite to the second conductive layer at the flat portion. The tab is electrically connected to the first conductive layer at the second end of the bent portion and the second conductive layer at the flat portion.

可以理解的是，本实施方式通过将集流体的非涂层部的部分设置成弯折部分，以使弯折部分的第二端的第一导电层与平坦部分的第二导电层相邻且相对设置。另外，通过将极耳电连接于弯折部分的第二端的第一导电层和平坦部分的第二导电层，从而使得极耳可以同时电连接集流体的第一导电层与第二导电层。这样，当第一电极片应用于电池时，第一活性涂层和第二活性涂层均可以实现导通，从而避免第一活性涂层和第二活性涂层中的一个因不工作而导致电池的容量的损失。另外，相较于第二活性涂层通过穿刺过孔等方式与极耳电连接的方案，本申请的电池不容易出现高阻态问题，不会影响电池的容量发挥和安全性能。It can be understood that, in this embodiment, the part of the non-coated part of the current collector is set as a bent part, so that the first conductive layer at the second end of the bent part is adjacent to and opposite to the second conductive layer of the flat part. set up. In addition, by electrically connecting the tab to the first conductive layer at the second end of the bent portion and the second conductive layer at the flat portion, the tab can be electrically connected to the first conductive layer and the second conductive layer of the current collector at the same time. In this way, when the first electrode sheet is applied to the battery, both the first active coating and the second active coating can realize conduction, thereby avoiding the failure of one of the first active coating and the second active coating to cause loss of battery capacity. In addition, compared with the scheme in which the second active coating is electrically connected to the tabs by puncturing through holes, the battery of the present application is not prone to high-resistance problems, and will not affect the capacity and safety performance of the battery.

在一种可能实现的方式中，弯折部分的第一导电层包括依次连接的第一段、第二段、第三段以及第四段。弯折部分的绝缘层的第二段与平坦部分的绝缘层相对设置。弯折部分的第一导电层的第四段为弯折部分的第二端的第一导电层。In a possible implementation manner, the first conductive layer of the bent portion includes a first segment, a second segment, a third segment and a fourth segment connected in sequence. The second segment of the insulating layer of the bent portion is arranged opposite to the insulating layer of the flat portion. The fourth segment of the first conductive layer of the bent portion is the first conductive layer of the second end of the bent portion.

第三方面，本申请实施例提供一种裸电芯。裸电芯包括第一隔离膜、第二隔离膜、第二电极片以及如上第一方面和第二方面所述的第一电极片。第一电极片、第一隔离膜、第二电极片与第二隔离膜依次设置。第一电极片、第一隔离膜、第二电极片与第二隔离膜呈卷曲状。In a third aspect, the embodiment of the present application provides a bare cell. The bare cell includes a first isolation film, a second isolation film, a second electrode sheet, and the first electrode sheet as described in the first aspect and the second aspect above. The first electrode sheet, the first isolation film, the second electrode sheet and the second isolation film are arranged in sequence. The first electrode sheet, the first isolation film, the second electrode sheet and the second isolation film are curled.

可以理解的是，裸电芯的第一电极片的极耳可以同时电连接集流体的第一导电层与第二导电层。这样，当裸电芯应用于电池时，第一活性涂层和第二活性涂层均可以实现导通，从而避免第一活性涂层和第二活性涂层中的一个因不工作而导致电池的容量的损失。另外，相较于第二活性涂层通过穿刺过孔等方式与极耳电连接的方案，本申请的电池不容易出现高阻态问题，不会影响电池的容量发挥和安全性能。It can be understood that the tab of the first electrode piece of the bare cell can be electrically connected to the first conductive layer and the second conductive layer of the current collector at the same time. In this way, when the bare cell is applied to the battery, both the first active coating and the second active coating can be conducted, thereby avoiding that one of the first active coating and the second active coating does not work and cause the battery to be damaged. loss of capacity. In addition, compared with the scheme in which the second active coating is electrically connected to the tabs by puncturing through holes, the battery of the present application is not prone to high-resistance problems, and will not affect the capacity and safety performance of the battery.

第四方面，本申请实施例提供一种裸电芯。裸电芯包括多个电池单元。每个电池单元均包括第一隔离膜、第二隔离膜、第二电极片以及如上第一方面和第二方面所述的第一电极片，第一电极片、第一隔离膜、第二电极片与第二隔离膜依次排布。In a fourth aspect, the embodiment of the present application provides a bare cell. A bare cell includes multiple battery cells. Each battery cell includes a first separator, a second separator, a second electrode sheet and the first electrode sheet as described in the first aspect and the second aspect above, the first electrode sheet, the first separator, the second electrode The sheet and the second isolation film are arranged in sequence.

在一种可能实现的方式中，多个电池单元的第一电极片的极耳的端部为一体成型结构。In a possible implementation manner, the ends of the tabs of the first electrode sheets of the plurality of battery cells are integrally formed.

在本实施方式中，通过将多个电池单元的第一电极片的极耳的端部为一体成型结构形成一体结构，从而在裸电芯应用于电池结构时，多个电池单元的第一电极片的极耳的端部可以作为共同端直接自电池外壳的内腔，穿过电池外壳，并伸出至电池外壳的外部。这样，一方面电池外壳只需开设一个通孔，就可以使得多个电池单元的第一电极片的极耳的端部穿过电池外壳，电池外壳的结构强度较佳，另一方面，相较于多个电池单元的第一电极片的极耳的端部通过超声波焊接的方案，多个电池单元的第一电极片的极耳的端部之间是点连接。这样，多个电池单元的第一电极片的极耳的端部之间具有较大的缝隙，电池内部的电解液容易经该缝隙流出。而本实施方式的多个电池单元的第一电极片的极耳的端部形成一体结构，多个电池单元的第一电极片的极耳的端部之间是面连接，多个电池单元的第一电极片的极耳的端部之间无缝隙，电池内部的电解液不容易发生泄漏。再一方面，相较于多个电池单元的第一电极片的极耳的端部通过超声波焊接，并通过转接焊金属极耳的方案。这样，转接焊金属极耳不但会导致电芯结构复杂化，而且转接焊需要占用极片的空间，影响能量密度的方案。而本实施方式的多个电池单元的第一电极片的极耳的端部形成一体结构不会导致电芯结构复杂化，也不会占用电池的空间。In this embodiment, the ends of the tabs of the first electrode sheets of the multiple battery cells are integrally formed to form an integral structure, so that when the bare cell is applied to the battery structure, the first electrodes of the multiple battery cells The ends of the lugs of the tabs can be used as the common end directly from the inner cavity of the battery case, pass through the battery case, and protrude to the outside of the battery case. In this way, on the one hand, the battery case only needs to open a through hole, so that the ends of the tabs of the first electrode pieces of multiple battery cells can pass through the battery case, and the structural strength of the battery case is better. On the other hand, compared with In the proposal that the ends of the tabs of the first electrode sheets of the plurality of battery cells are ultrasonically welded, the ends of the tabs of the first electrode sheets of the plurality of battery cells are point-connected. In this way, there is a large gap between the ends of the tabs of the first electrode sheet of the plurality of battery cells, and the electrolyte inside the battery can easily flow out through the gap. However, in this embodiment, the ends of the tabs of the first electrode sheets of the plurality of battery cells form an integrated structure, and the ends of the tabs of the first electrode sheets of the plurality of battery cells are surface-connected, and the ends of the tabs of the plurality of battery cells There is no gap between the ends of the tabs of the first electrode piece, and the electrolyte inside the battery is not easy to leak. In yet another aspect, compared with the solution of the ends of the tabs of the first electrode sheet of the plurality of battery cells are ultrasonically welded, and the metal tabs are transfer-welded. In this way, the transfer welding of metal tabs will not only complicate the structure of the battery core, but also require the space of the pole piece to be occupied by transfer welding, which will affect the energy density solution. However, in this embodiment, forming an integrated structure at the ends of the tabs of the first electrode sheets of the plurality of battery cells will not complicate the structure of the battery cells, and will not occupy the space of the battery.

在一种可能实现的方式中，相邻两个电池单元的弯折部分的第一导电层的第二端相向设置。相邻两个电池单元的第一电极片的极耳为一体成型结构。这样，裸电池的极耳的结构较为简单。In a possible implementation manner, the second ends of the first conductive layers of the bent parts of two adjacent battery cells are disposed opposite to each other. The tabs of the first electrode sheets of two adjacent battery cells are integrally formed. In this way, the structure of the tab of the bare cell is relatively simple.

第五方面，本申请实施例提供一种电池。电池包括电池外壳、电解液以及如上所述的裸电芯。电池外壳具有内腔。裸电芯的一部分设置于电池外壳的内腔。裸电芯的第一电极片的极耳自电池外壳的内腔伸出电池外壳的外部。电解液设置于电池外壳的内腔。裸电芯的一部分设置于电解液内。In a fifth aspect, the embodiment of the present application provides a battery. A battery includes a battery case, an electrolyte, and bare cells as described above. The battery housing has an interior cavity. A part of the bare cell is disposed in the inner cavity of the battery case. The tabs of the first electrode sheet of the bare cell protrude from the inner cavity of the battery case to the outside of the battery case. The electrolyte is arranged in the inner chamber of the battery case. A part of the bare cell is disposed in the electrolyte.

可以理解的是，电池的第一活性涂层和第二活性涂层均可以实现导通，从而避免第一活性涂层和第二活性涂层中的一个因不工作而导致电池的容量的损失。另外，相较于第二活性涂层通过穿刺过孔等方式与极耳电连接的方案，本申请的电池不容易出现高阻态问题，不会影响电池的容量发挥和安全性能。It can be understood that both the first active coating layer and the second active coating layer of the battery can realize conduction, thereby avoiding the loss of the capacity of the battery due to non-operation of one of the first active coating layer and the second active coating layer . In addition, compared with the scheme in which the second active coating is electrically connected to the tabs by puncturing through holes, the battery of the present application is not prone to high-resistance problems, and will not affect the capacity and safety performance of the battery.

第六方面，本申请实施例提供一种电子设备。电子设备包括设备壳体以及如上所述的电池。电池设于设备壳体。In a sixth aspect, the embodiment of the present application provides an electronic device. An electronic device includes a device housing and a battery as described above. The battery is located in the device casing.

第七方面，本申请实施例提供一种第一电极片。第一电极片包括集流体、第一活性涂层、第二活性涂层、第三活性涂层、第四活性涂层以及极耳。从第一方向看，集流体包括绝缘层、第一导电层以及第二导电层。绝缘层连接于第一导电层和第二导电层之间。从第二方向看，集流体包括第一涂层部、第二涂层部和非涂层部。非涂层部连接于第一涂层部与第二涂层部之间。第一活性涂层位于第一涂层部的第一导电层。第二活性涂层位于第一涂层部的第二导电层。第三活性涂层位于第二涂层部的第一导电层。第四活性涂层位于第二涂层部的第二导电层。In a seventh aspect, the embodiment of the present application provides a first electrode sheet. The first electrode sheet includes a current collector, a first active coating, a second active coating, a third active coating, a fourth active coating and tabs. Viewed from a first direction, the current collector includes an insulating layer, a first conductive layer and a second conductive layer. The insulation layer is connected between the first conductive layer and the second conductive layer. Viewed from the second direction, the current collector includes a first coating part, a second coating part and a non-coating part. The non-coated portion is connected between the first coated portion and the second coated portion. The first active coating is located on the first conductive layer of the first coating portion. A second active coating is located on the second conductive layer of the first coating portion. A third active coating is located on the first conductive layer of the second coating portion. A fourth active coating is located on the second conductive layer of the second coating portion.

极耳包括的第一固定部、第二固定部以及连接部。第一固定部的一端与第二固定部的一端共同连接于连接部的一端。第一固定部的另一端与第二固定部的另一端分开设置。极耳的第一固定部电连接于非涂层部的第一导电层。第二固定部电连接于非涂层部的第二导电层。The tab includes a first fixing part, a second fixing part and a connecting part. One end of the first fixing part and one end of the second fixing part are jointly connected to one end of the connecting part. The other end of the first fixing part is set apart from the other end of the second fixing part. The first fixed part of the tab is electrically connected to the first conductive layer of the non-coated part. The second fixing part is electrically connected to the second conductive layer of the non-coating part.

可以理解的是，本实施方式通过设置一种极耳结构，极耳的第一固定部的一端与第二固定部的一端共同连接于连接部的一端，极耳的第一固定部的另一端与第二固定部的另一端分开设置。再通过将极耳的第一固定部电连接于非涂层部的第一导电层，第二固定部电连接于非涂层部的第二导电层，从而使得极耳可以同时电连接集流体的第一导电层与第二导电层。这样，当第一电极片应用于电池时，第一活性涂层、第二活性涂层、第三活性涂层、第四活性涂层均可以实现导通，从而避免第一活性涂层、第二活性涂层、第三活性涂层、第四活性涂层中的一个因不工作而导致电池的容量的损失。另外，相较于第二活性涂层和第四活性涂层通过穿刺过孔等方式与极耳电连接的方案，本申请的电池不容易出现高阻态问题，不会影响电池的容量发挥和安全性能。It can be understood that, by providing a tab structure in this embodiment, one end of the first fixing part of the tab and one end of the second fixing part are jointly connected to one end of the connecting part, and the other end of the first fixing part of the tab is It is set apart from the other end of the second fixing part. Then by electrically connecting the first fixed part of the tab to the first conductive layer of the non-coated part, and the second fixed part is electrically connected to the second conductive layer of the non-coated part, so that the tab can be electrically connected to the current collector at the same time The first conductive layer and the second conductive layer. In this way, when the first electrode sheet is applied to a battery, the first active coating, the second active coating, the third active coating, and the fourth active coating can all realize conduction, thereby avoiding the first active coating, the second active coating One of the second active coating layer, the third active coating layer, and the fourth active coating layer does not work, resulting in a loss of capacity of the battery. In addition, compared with the scheme in which the second active coating layer and the fourth active coating layer are electrically connected to the tabs by piercing through holes, etc., the battery of the present application is not prone to high-resistance problems, and will not affect the capacity and performance of the battery. safety performance.

在一种可能实现的方式中，极耳的材质包括镍、铜、铝、铜镀镍、不锈钢、铝合金、铜铝复合带、涂有碳层的金属带中的一种或多种；或，集流体的第一导电层的材质包括铜、铝、钛、不锈钢、其他金属合金、碳、石墨中的一种或多种。In a possible implementation manner, the material of the tab includes one or more of nickel, copper, aluminum, nickel-plated copper, stainless steel, aluminum alloy, copper-aluminum composite strip, and metal strip coated with carbon layer; or , the material of the first conductive layer of the current collector includes one or more of copper, aluminum, titanium, stainless steel, other metal alloys, carbon, and graphite.

可以理解的是，本实现方式的第一电极片也可以应用于两种不同的裸电芯、电池以及电子设备。It can be understood that the first electrode sheet in this implementation manner can also be applied to two different bare cells, batteries and electronic devices.

第八方面，本申请实施例提供一种第一电极片。第一电极片包括集流体、第一活性涂层、第二活性涂层、第一极耳以及第二极耳。从第一方向看，集流体包括绝缘层、第一导电层以及第二导电层。绝缘层位于第一导电层和第二导电层之间。从第二方向看，集流体包括第一非涂层部、第二非涂层部以及涂层部。涂层部连接于第一非涂层部和第二非涂层部之间。第一活性涂层位于涂层部的第一导电层。第二活性涂层位于涂层部的第二导电层。第一方向和第二方向不同。In an eighth aspect, the embodiment of the present application provides a first electrode sheet. The first electrode sheet includes a current collector, a first active coating, a second active coating, a first tab and a second tab. Viewed from a first direction, the current collector includes an insulating layer, a first conductive layer and a second conductive layer. The insulating layer is located between the first conductive layer and the second conductive layer. Viewed from the second direction, the current collector includes a first non-coated part, a second non-coated part and a coated part. The coated portion is connected between the first uncoated portion and the second uncoated portion. The first active coating is located on the first conductive layer of the coating portion. A second active coating is located on the second conductive layer of the coating portion. The first direction and the second direction are different.

第一极耳电连接于第一非涂层部的第一导电层。第二极耳电连接于第二非涂层部的第二导电层。The first tab is electrically connected to the first conductive layer of the first non-coating portion. The second tab is electrically connected to the second conductive layer of the second non-coating portion.

可以理解的是，本实施方式通过设置两个极耳，也即第一极耳和第二极耳。其中，第一极耳可以电连接于第一非涂层部的第一导电层。第二极耳可以电连接于第二非涂层部的第二导电层。这样，当第一电极片应用于电池时，第一活性涂层可以通过第一极耳实现导通，第二活性涂层可以通过第二极耳实现导通，从而避免第一活性涂层和第二活性涂层中的一个因不工作而导致电池的容量的损失。另外，相较于第二活性涂层通过穿刺过孔等方式与极耳电连接的方案，本申请的电池不容易出现高阻态问题，不会影响电池的容量发挥和安全性能。It can be understood that in this embodiment, two tabs are provided, that is, a first tab and a second tab. Wherein, the first tab can be electrically connected to the first conductive layer of the first non-coating portion. The second tab can be electrically connected to the second conductive layer of the second non-coating portion. In this way, when the first electrode sheet is applied to a battery, the first active coating can be conducted through the first tab, and the second active coating can be conducted through the second tab, thereby avoiding the first active coating and the second tab. Failure of one of the second active coatings results in a loss of capacity in the battery. In addition, compared with the scheme in which the second active coating is electrically connected to the tabs by puncturing through holes, the battery of the present application is not prone to high-resistance problems, and will not affect the capacity and safety performance of the battery.

在一种可能实现的方式中，第一极耳伸出集流体的部分与第二极耳伸出集流体的部分位于集流体的同一侧，或者位于集流体的不同侧。In a possible implementation manner, the part of the first tab protruding from the current collector and the part of the second tab protruding from the current collector are located on the same side of the current collector, or are located on different sides of the current collector.

第九方面，本申请实施例提供一种电池。电池包括电池外壳、电解液以及裸电芯。电池外壳具有内腔。部分裸电芯设置于电池外壳的内腔。裸电芯包括第一隔离膜、第二隔离膜、第二电极片以及如第八方面所述的第一电极片。第一电极片、第一隔离膜、第二电极片与第二隔离膜依次设置。裸电芯的第一电极片的第一极耳和第二极耳分别自电池外壳的内腔伸出电池外壳的外部，并共同电连接于电池外壳外部的电极端。In a ninth aspect, the embodiment of the present application provides a battery. A battery includes a battery case, electrolyte and bare cells. The battery housing has an interior cavity. Part of the bare cells are arranged in the inner cavity of the battery casing. The bare cell includes a first isolation film, a second isolation film, a second electrode sheet, and the first electrode sheet as described in the eighth aspect. The first electrode sheet, the first isolation film, the second electrode sheet and the second isolation film are arranged in sequence. The first tab and the second tab of the first electrode sheet of the bare cell protrude from the inner cavity of the battery case to the outside of the battery case, and are electrically connected to the electrode terminals outside the battery case.

电解液设置于电池外壳的内腔，裸电芯的一部分设置于电解液内。The electrolyte is arranged in the inner chamber of the battery case, and a part of the bare cell is arranged in the electrolyte.

第十方面，本申请实施例提供一种电子设备。电子设备包括设备壳体以及如上第九方面所述的电池。电池设于设备壳体。In a tenth aspect, the embodiment of the present application provides an electronic device. The electronic device includes a device casing and the battery as described in the ninth aspect above. The battery is located in the device casing.

第十一方面，本申请实施例提供一种裸电芯。裸电芯包括第一电极片、第一隔离膜、第二隔离膜以及第二电极片。第一电极片、第一隔离膜、第二电极片与第二隔离膜依次设置。第一电极片、第一隔离膜、第二电极片与第二隔离膜呈卷曲状。In an eleventh aspect, the embodiment of the present application provides a bare cell. The bare cell includes a first electrode sheet, a first isolation film, a second isolation film and a second electrode sheet. The first electrode sheet, the first isolation film, the second electrode sheet and the second isolation film are arranged in sequence. The first electrode sheet, the first isolation film, the second electrode sheet and the second isolation film are curled.

第一电极片包括集流体、第一活性涂层以及第二活性涂层。从第二方向看，集流体包括涂层部以及多个非涂层部。多个非涂层部间隔地连接涂层部。涂层部包括背向设置的第一面和第二面。第一活性涂层位于第一面。第二活性涂层位于第二面。多个非涂层部的端部为一体成型结构。The first electrode sheet includes a current collector, a first active coating and a second active coating. Viewed from the second direction, the current collector includes a coated portion and a plurality of non-coated portions. The plurality of non-coating parts are connected to the coating part at intervals. The coating portion includes a first face and a second face disposed opposite to each other. A first active coating is on the first side. A second active coating is on the second side. The ends of the multiple non-coating parts are integrally formed.

在本实施方式中，通过将多个非涂层部的端部形成一体结构，从而在裸电芯应用于电池结构时，多个非涂层部的端部可以作为共同端直接自电池外壳的内腔，穿过电池外壳，并伸出至电池外壳的外部。这样，一方面电池外壳只需开设一个通孔，就可以使得多个非涂层部的端部穿过电池外壳，电池外壳的结构强度较佳，另一方面，相较于多个非涂层部的端部通过超声波焊接的方案，多个非涂层部的端部之间是点连接。这样，多个非涂层部的端部之间具有较大的缝隙，电池内部的电解液容易经该缝隙流出。而本实施方式的多个非涂层部的端部形成一体结构，多个非涂层部的端部之间是面连接，多个非涂层部的端部之间无缝隙，电池内部的电解液不容易发生泄漏。再一方面，相较于多个非涂层部的端部通过超声波焊接，并通过转接焊金属极耳的方案。这样，转接焊金属极耳不但会导致电芯结构复杂化，而且转接焊需要占用极片的空间，影响能量密度的方案。而本实施方式的多个非涂层部的端部形成一体结构不会导致电芯结构复杂化，也不会占用电池的空间。In this embodiment, by forming the ends of a plurality of non-coating parts into an integrated structure, when the bare cell is applied to a battery structure, the ends of a plurality of non-coating parts can be used as a common end directly from the battery casing. The inner cavity passes through the battery case and extends to the outside of the battery case. In this way, on the one hand, the battery case only needs to open a through hole, so that the ends of the multiple non-coating parts can pass through the battery case, and the structural strength of the battery case is better. The end of the part is ultrasonically welded, and the ends of multiple non-coated parts are connected by points. In this way, there are large gaps between the ends of the plurality of non-coating parts, and the electrolyte solution inside the battery can easily flow out through the gaps. However, the ends of the multiple non-coating parts in this embodiment form an integrated structure, the ends of the multiple non-coating parts are surface-connected, and there is no gap between the ends of the multiple non-coating parts. Electrolyte is not easy to leak. On the other hand, compared with the solution that the ends of the non-coating parts are ultrasonically welded and the metal tabs are welded through transfer. In this way, the transfer welding of metal tabs will not only complicate the structure of the battery core, but also require the space of the pole piece to be occupied by transfer welding, which will affect the energy density solution. However, the integrated structure of the ends of the multiple non-coating parts in this embodiment will not complicate the structure of the battery cell, nor will it occupy the space of the battery.

第十二方面，本申请实施例提供一种裸电芯。裸电芯包括多个沿第二方向排布的电池单元。每个电池单元均包括沿第二方向排布的第一电极片、第一隔离膜、第二电极片、第二隔离膜。从第二方向看，集流体包括涂层部以及连接涂层部的非涂层部。涂层部包括背向设置的第一面和第二面。第一活性涂层位于涂第一面。第二活性涂层位于第二面。多个电池单元的非涂层部的端部为一体成型结构。In a twelfth aspect, the embodiment of the present application provides a bare cell. The bare cell includes a plurality of battery cells arranged along the second direction. Each battery cell includes a first electrode sheet, a first separator, a second electrode sheet, and a second separator arranged along the second direction. Viewed from the second direction, the current collector includes a coated portion and a non-coated portion connected to the coated portion. The coating portion includes a first face and a second face disposed opposite to each other. The first active coating is on the coated first side. A second active coating is on the second side. The ends of the non-coated parts of the plurality of battery cells are integrally formed.

在本实施方式中，通过将多个电池单元的非涂层部的端部形成一体结构，从而在裸电芯应用于电池结构时，多个电池单元的非涂层部的端部可以作为共同端直接自电池外壳的内腔，穿过电池外壳，并伸出至电池外壳的外部。这样，一方面电池外壳只需开设一个通孔，就可以使得多个非涂层部的端部穿过电池外壳，电池外壳的结构强度较佳，另一方面，相较于多个电池单元的非涂层部的端部通过超声波焊接的方案，多个电池单元的非涂层部的端部之间是点连接。这样，多个电池单元的非涂层部的端部之间具有较大的缝隙，电池内部的电解液容易经该缝隙流出。而本实施方式的多个电池单元的非涂层部的端部形成一体结构，多个电池单元的非涂层部的端部之间是面连接，多个电池单元的非涂层部的端部之间无缝隙，电池内部的电解液不容易发生泄漏。再一方面，相较于多个电池单元的非涂层部的端部通过超声波焊接，并通过转接焊金属极耳的方案。这样，转接焊金属极耳不但会导致电芯结构复杂化，而且转接焊需要占用极片的空间，影响能量密度的方案。而本实施方式的多个电池单元的非涂层部的端部形成一体结构不会导致电芯结构复杂化，也不会占用电池的空间。In this embodiment, by forming the ends of the non-coated parts of multiple battery cells into an integrated structure, when bare cells are applied to the battery structure, the ends of the non-coated parts of multiple battery cells can be used as a common The terminal is directly from the inner cavity of the battery case, passes through the battery case, and protrudes to the outside of the battery case. In this way, on the one hand, the battery case only needs to open a through hole, so that the ends of a plurality of non-coating parts can pass through the battery case, and the structural strength of the battery case is better; The ends of the non-coated parts are ultrasonically welded, and the ends of the non-coated parts of the plurality of battery cells are connected at points. In this way, there are large gaps between the ends of the non-coated parts of the plurality of battery cells, and the electrolyte solution inside the battery can easily flow out through the gaps. However, the ends of the non-coated parts of the multiple battery cells in this embodiment form an integrated structure, the ends of the non-coated parts of the multiple battery cells are connected by plane, and the ends of the non-coated parts of the multiple battery cells There is no gap between parts, and the electrolyte inside the battery is not easy to leak. On the other hand, compared with the scheme that the ends of the non-coated parts of the multiple battery cells are welded by ultrasonic waves, and the metal tabs are welded by transfer. In this way, the transfer welding of metal tabs will not only complicate the structure of the battery core, but also require the space of the pole piece to be occupied by transfer welding, which will affect the energy density solution. However, in this embodiment, forming an integrated structure at the ends of the non-coating parts of the plurality of battery cells will not complicate the structure of the battery cells, and will not occupy the space of the battery.

可以理解的是，第十一方面和第十二方面的裸电芯也可以应用于电池结构和电子设备结构中。It can be understood that the bare cells of the eleventh aspect and the twelfth aspect can also be applied to battery structures and electronic device structures.

附图说明Description of drawings

为了说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图进行说明。In order to illustrate the technical solutions of the embodiments of the present application, the drawings that need to be used in the embodiments of the present application will be described below.

图1a是传统的电极片的剖面示意图；Figure 1a is a schematic cross-sectional view of a conventional electrode sheet;

图1b是本申请提供的电子设备的一种实施方式的结构示意图；Fig. 1b is a schematic structural diagram of an embodiment of an electronic device provided by the present application;

图2是图1b所示的电池的一种实施方式的部分剖面示意图；Figure 2 is a schematic partial cross-sectional view of an embodiment of the battery shown in Figure 1b;

图3是图2所示的裸电芯的一种实施方式的部分分解示意图；Fig. 3 is a partially exploded schematic diagram of an embodiment of the bare cell shown in Fig. 2;

图4是图3所示的第一电极片的一种实施方式的结构示意图；Fig. 4 is a schematic structural view of an embodiment of the first electrode sheet shown in Fig. 3;

图5a是图4所示的第一电极片在A-A线处的部分剖面示意图；Figure 5a is a schematic partial cross-sectional view of the first electrode sheet shown in Figure 4 at the line A-A;

图5b是图5a所示的第一电极片在P处的放大示意图；Fig. 5b is an enlarged schematic diagram at P of the first electrode sheet shown in Fig. 5a;

图6是图4所示的第一电极片在B-B线处的部分剖面示意图；Fig. 6 is a partial cross-sectional schematic diagram of the first electrode sheet shown in Fig. 4 at the B-B line;

图7是图3所示的第一电极片的另一种实施方式的结构示意图；Fig. 7 is a schematic structural view of another embodiment of the first electrode sheet shown in Fig. 3;

图8是本申请实施例的第一电极片在加工过程中的一种实施方式的结构示意图；Fig. 8 is a schematic structural view of an embodiment of the first electrode sheet in the processing process of the embodiment of the present application;

图9是图8所示的第一电极片在加工过程中的结构在C-C线处的部分剖面示意图；Fig. 9 is a schematic partial cross-sectional view of the structure of the first electrode sheet shown in Fig. 8 at the C-C line during processing;

图10是图8所示的第一电极片在加工过程中的结构在裁切后的结构示意图；FIG. 10 is a schematic structural view of the structure of the first electrode sheet shown in FIG. 8 during processing after cutting;

图11是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 11 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图12是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 12 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图13是图12所示的第一电极片在D-D线处的部分剖面示意图；Fig. 13 is a schematic partial cross-sectional view of the first electrode sheet shown in Fig. 12 at the line D-D;

图14是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 14 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图15是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 15 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图16是图15所示的第一电极片在E-E线处的部分剖面示意图；Fig. 16 is a schematic partial cross-sectional view of the first electrode sheet shown in Fig. 15 at the E-E line;

图17是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 17 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图18是图17所示的第一电极片在F-F线处的部分剖面示意图；Fig. 18 is a schematic partial cross-sectional view of the first electrode sheet shown in Fig. 17 at the line F-F;

图19是图17所示的第一电极片的极耳40的一种实施方式的结构示意图；Fig. 19 is a schematic structural view of an embodiment of the tab 40 of the first electrode sheet shown in Fig. 17;

图20a是本申请实施例提供的裸电芯的另一种实施方式的结构示意图；Fig. 20a is a schematic structural view of another embodiment of the bare cell provided in the embodiment of the present application;

图20b是本申请实施例提供的裸电芯的再一种实施方式的结构示意图；Fig. 20b is a schematic structural diagram of another embodiment of the bare cell provided in the embodiment of the present application;

图21是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 21 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图22是图21所示的第一电极片在G-G线处的部分剖面示意图；Fig. 22 is a schematic partial cross-sectional view of the first electrode sheet shown in Fig. 21 at the G-G line;

图23是图21所示的第一电极片应用于电池的一种实施方式的剖面示意图；Fig. 23 is a schematic cross-sectional view of an embodiment in which the first electrode sheet shown in Fig. 21 is applied to a battery;

图24是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 24 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图25是图24所示的第一电极片应用于电池的一种实施方式的结构示意图；Fig. 25 is a schematic structural view of an embodiment in which the first electrode sheet shown in Fig. 24 is applied to a battery;

图26是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 26 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图27是图26所示的第一电极片在H-H线处的部分剖面示意图；Fig. 27 is a schematic partial cross-sectional view of the first electrode sheet shown in Fig. 26 at the line H-H;

图28是图26所示的第一电极片应用于裸电芯的一种实施方式的结构示意图；Fig. 28 is a schematic structural view of an embodiment in which the first electrode sheet shown in Fig. 26 is applied to a bare cell;

图29是图28所示的裸电芯在形成过程中的结构示意图；FIG. 29 is a schematic structural view of the bare cell shown in FIG. 28 during the formation process;

图30是图3所示的第一电极片的再一种实施方式的结构示意图；Fig. 30 is a schematic structural view of yet another embodiment of the first electrode sheet shown in Fig. 3;

图31是图30所示的第一电极片在I-I线处的部分剖面示意图；Fig. 31 is a partial cross-sectional schematic diagram of the first electrode sheet shown in Fig. 30 at the I-I line;

图32是图30所示的第一电极片应用于裸电芯的一种实施方式的部分分解示意图；Fig. 32 is a partially exploded schematic diagram of an embodiment in which the first electrode sheet shown in Fig. 30 is applied to a bare cell;

图33是图30所示的第一电极片应用于裸电芯的一种实施方式的部分剖面示意图。FIG. 33 is a schematic partial cross-sectional view of an implementation in which the first electrode sheet shown in FIG. 30 is applied to a bare cell.

具体实施方式Detailed ways

下面结合本申请实施例中的附图对本申请实施例进行描述。Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

在本申请实施例的描述中，需要说明的是，除非另有明确的规定和限定，术语“连接”应做广义理解，例如，“连接”可以是可拆卸地连接，也可以是不可拆卸地连接；可以是直接连接，也可以通过中间媒介间接连接。其中，“固定”是指彼此连接且连接后的相对位置关系不变。本申请实施例中所提到的方位用语，例如，“内”、“外”、“前”、“后”、“顶”、“底”、等，仅是参考附图的方向，因此，使用的方位用语是为了更好、更清楚地说明及理解本申请实施例，而不是指示或暗指所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。术语“包括”、“具有”及它们的变形都意味着“包括但不限于”，除非是以其他方式另外特别强调。“多个”指的是至少两个。In the description of the embodiments of this application, it should be noted that unless otherwise specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a detachable connection or a non-detachable connection. A connection; either direct or indirect through an intermediary. Wherein, "fixed" means that they are connected to each other and the relative positional relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present application, such as "inner", "outer", "front", "rear", "top", "bottom", etc., are only referring to the directions of the drawings, therefore, The orientation terms used are for better and clearer description and understanding of the embodiments of the present application, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as Limitations on the embodiments of this application. The terms "including", "having" and their variations all mean "including but not limited to", unless specifically stated otherwise. "A plurality" means at least two.

另外，在本申请实施例中，提到的数学概念，相等、平行、垂直等。这些限定，均是针对当前工艺水平而言的，而不是数学意义上绝对严格的定义，允许存在少量偏差，近似于相等、近似于平行、近似于垂直等均可以。例如，A与B平行，是指A与B之间平行或者近似于平行，A与B之间的夹角在0度至10度之间均可。例如，A与B垂直，是指A与B之间垂直或者近似于垂直，A与B之间的夹角在80度至100度之间均可。In addition, in the embodiments of the present application, the mathematical concepts mentioned are equal, parallel, perpendicular, etc. These limitations are all aimed at the current technological level, rather than absolutely strict definitions in the mathematical sense, and a small amount of deviation is allowed, such as being approximately equal, approximately parallel, approximately vertical, etc. For example, A and B are parallel, which means that A and B are parallel or nearly parallel, and the angle between A and B can be between 0 degree and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or nearly perpendicular, and the angle between A and B may be between 80 degrees and 100 degrees.

请参阅图1b，图1b是本申请提供的电子设备1的一种实施方式的结构示意图。电子设备1可以为手机、平板电脑(tablet personal computer)、膝上型电脑(laptop computer)、个人数码助理(personal digital assistant，PDA)、照相机、个人计算机、笔记本电脑、车载设备、可穿戴设备、增强现实(augmented reality，AR)眼镜、AR头盔、虚拟现实(virtual reality，VR)眼镜或者VR头盔等具有电池1000的数码终端设备。电子设备1也可以为电动汽车、电动工具、储能***等具有电池1000的非数码终端设备。图1b所示实施例的电子设备1以手机为例进行阐述。Please refer to FIG. 1b . FIG. 1b is a schematic structural diagram of an implementation manner of an electronic device 1 provided in the present application. The electronic device 1 may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, Augmented reality (augmented reality, AR) glasses, AR helmets, virtual reality (virtual reality, VR) glasses or VR helmets and other digital terminal devices with batteries 1000. The electronic device 1 may also be a non-digital terminal device having a battery 1000 such as an electric vehicle, an electric tool, or an energy storage system. The electronic device 1 of the embodiment shown in FIG. 1 b is described by taking a mobile phone as an example.

请再次参阅图1b，电子设备1包括电池1000、设备壳体2000以及屏幕3000。需要说明的是，图1b以及下文相关附图仅示意性的示出了电子设备1包括的一些部件，这些部件的实际形状、实际大小、实际位置和实际构造不受图1b以及下文各附图限定。另外，由于电池1000为电子设备1的内部结构，图1b通过虚线示意性地给出电池1000。在其他实施例中，当电子设备1为一些其他形态的设备时，电子设备1也可以不包括屏幕3000。Please refer to FIG. 1 b again, the electronic device 1 includes a battery 1000 , a device casing 2000 and a screen 3000 . It should be noted that FIG. 1b and the related drawings below only schematically show some components included in the electronic device 1, and the actual shape, actual size, actual position and actual structure of these components are not affected by FIG. 1b and the following accompanying drawings. limited. In addition, since the battery 1000 is an internal structure of the electronic device 1 , FIG. 1 b schematically shows the battery 1000 by dotted lines. In other embodiments, when the electronic device 1 is some other type of device, the electronic device 1 may not include the screen 3000 .

示例性地，设备壳体2000包括边框2100以及后盖2200。由于后盖2200在电子设备1背向位置，图1b通过虚线示意性地给出后盖2200。后盖2200与屏幕3000分别固定于边框2100的两侧。屏幕3000、边框2100与后盖2200可以共同围出电子设备1的内部。电子设备1的内部可以用于放置电子设备1的器件，例如摄像模组、电路板、受话器或者麦克风等。Exemplarily, the device case 2000 includes a frame 2100 and a rear cover 2200 . Since the rear cover 2200 is in a position facing away from the electronic device 1 , the rear cover 2200 is schematically shown by a dotted line in FIG. 1 b . The rear cover 2200 and the screen 3000 are respectively fixed on two sides of the frame 2100 . The screen 3000 , the frame 2100 and the rear cover 2200 can jointly enclose the interior of the electronic device 1 . The interior of the electronic device 1 can be used to place components of the electronic device 1 , such as a camera module, a circuit board, a receiver or a microphone, and the like.

在本实施方式中，屏幕3000可用于显示图像等。屏幕3000可以为平面屏，也可以为曲面屏。屏幕3000的显示屏可以采用有机发光二极管(organic light-emitting diode，OLED)显示屏，或者有源矩阵有机发光二极体，或者主动矩阵有机发光二极体(active-matrix organic light-emitting diode，AMOLED)显示屏，或者液晶显示屏(liquid crystal display,LCD)等。In this embodiment, the screen 3000 can be used to display images and the like. The screen 3000 may be a flat screen or a curved screen. The display screen of the screen 3000 can adopt organic light-emitting diode (organic light-emitting diode, OLED) display screen, or active matrix organic light-emitting diode, or active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED) display, or liquid crystal display (LCD) and so on.

在本实施方式中，电池1000可以设置于设备壳体2000的内部。电池1000用于向屏幕3000供电。电池1000可以为锂离子电池、钠离子二次电池、钾离子二次电池、镁离子二次电池、锌离子二次电池或者铝离子二次电池。In this embodiment, the battery 1000 may be disposed inside the device casing 2000 . The battery 1000 is used to supply power to the screen 3000 . The battery 1000 may be a lithium ion battery, a sodium ion secondary battery, a potassium ion secondary battery, a magnesium ion secondary battery, a zinc ion secondary battery or an aluminum ion secondary battery.

请参阅图2，图2是图1b所示的电池1000的一种实施方式的部分剖面示意图。电池1000包括裸电芯100、电池外壳200以及电解液300。Please refer to FIG. 2 . FIG. 2 is a schematic partial cross-sectional view of an embodiment of the battery 1000 shown in FIG. 1 b. The battery 1000 includes a bare cell 100 , a battery case 200 and an electrolyte 300 .

在一种实施方式中，电池外壳200包括顶壁210、周侧壁220和底壁230。顶壁210和底壁230相对设置。周侧壁220连接在顶壁210和底壁230之间。顶壁210、周侧壁220和底壁230围出电池外壳200的内腔。In one embodiment, the battery housing 200 includes a top wall 210 , a peripheral side wall 220 and a bottom wall 230 . The top wall 210 and the bottom wall 230 are oppositely disposed. The peripheral sidewall 220 is connected between the top wall 210 and the bottom wall 230 . The top wall 210 , the peripheral side walls 220 and the bottom wall 230 enclose the inner cavity of the battery case 200 .

在一种实施方式中，顶壁210设有间隔设置的第一通孔210a和第二通孔210b。第一通孔210a与第二通孔210b均可以将电池外壳200的内腔连通至电池外壳200的外部。在其他实施方式中，第一通孔210a也可以位于周侧壁220，也可以位于底壁230。第二通孔210b也可以位于周侧壁220，也可以位于底壁230。In one embodiment, the top wall 210 is provided with a first through hole 210 a and a second through hole 210 b arranged at intervals. Both the first through hole 210 a and the second through hole 210 b can communicate the inner cavity of the battery case 200 to the outside of the battery case 200 . In other embodiments, the first through hole 210a may also be located on the peripheral side wall 220 or the bottom wall 230 . The second through hole 210b can also be located on the peripheral side wall 220, or can also be located on the bottom wall 230.

裸电芯100包括间隔设置的第一极耳部101和第二极耳部102。示例性地，第一极耳部101可以作为电池1000的正极。第二极耳部102可以作为电池1000的负极。在其他实施方式中，第一极耳部101也可以作为负极。第二极耳部102也可以作为正极。The bare cell 100 includes a first tab portion 101 and a second tab portion 102 arranged at intervals. Exemplarily, the first tab part 101 can serve as the positive pole of the battery 1000 . The second tab part 102 can be used as a negative electrode of the battery 1000 . In other implementation manners, the first tab portion 101 may also serve as a negative electrode. The second tab portion 102 can also serve as a positive electrode.

示例性地，第一极耳部101和第二极耳部102可以位于裸电芯100的同一端部。在其他实施方式中，第一极耳部101和第二极耳部102也可以分别位于裸电芯100的两端部。Exemplarily, the first tab portion 101 and the second tab portion 102 may be located at the same end of the bare cell 100 . In other implementation manners, the first tab portion 101 and the second tab portion 102 may also be respectively located at two ends of the bare cell 100 .

裸电芯100的一部分设置于电池外壳200的内腔，一部分设置于电池外壳200的外部。其中，裸电芯100的第一极耳部101自电池外壳200的内腔，穿过电池外壳200的顶壁210的第一通孔210a，并伸出至电池外壳200的外部。裸电芯100的第二极耳部102自电池外壳200的内腔，穿过电池外壳200的顶壁210的第二通孔210b，并伸出至电池外壳200的外部。A part of the bare cell 100 is disposed in the inner cavity of the battery case 200 , and a part is disposed outside the battery case 200 . Wherein, the first tab portion 101 of the bare cell 100 passes through the first through hole 210 a of the top wall 210 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 . The second tab portion 102 of the bare cell 100 passes through the second through hole 210 b of the top wall 210 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 .

在一种实施方式中，也可以通过在第一极耳部101与第一通孔210a的孔壁之间设置密封件，以及在第二极耳部102与第二通孔210b的孔壁之间设置密封件，从而使得电池外壳200的内腔成为密闭的空间。示例性地，密封件可以为金属、玻璃、陶瓷、聚合物等。In one embodiment, a sealing member may also be provided between the first lug portion 101 and the wall of the first through hole 210a, and between the second lug portion 102 and the wall of the second through hole 210b. A sealing member is provided between them, so that the inner cavity of the battery case 200 becomes an airtight space. Exemplarily, the sealing member may be metal, glass, ceramic, polymer or the like.

在其他实施方式中，裸电芯100的第一极耳部101可以与第一通孔210a的孔壁接触，第二极耳部102也可以与第二通孔210b的孔壁接触。这样，通过裸电芯100的第一极耳部101和第二极耳部102可以直接密封第一通孔210a和第二通孔210b，从而使得电池外壳200的内腔成为密闭的空间。In other implementation manners, the first tab portion 101 of the bare cell 100 may be in contact with the hole wall of the first through hole 210a, and the second tab portion 102 may also be in contact with the hole wall of the second through hole 210b. In this way, the first through hole 210 a and the second through hole 210 b can be directly sealed by the first lug portion 101 and the second lug portion 102 of the bare cell 100 , so that the inner cavity of the battery case 200 becomes an airtight space.

在其他实施方式中，当电池外壳200没有设置第一通孔210a和第二通孔210b时，裸电芯100的第一极耳部101可以经电池外壳200的顶壁210与周侧壁220之间的缝隙伸出电池外壳200的内腔，裸电芯100的第二极耳部102也可以经电池外壳200的顶壁210与周侧壁220之间的缝隙伸出电池外壳200的内腔。应理解，裸电芯100的第一极耳部101和第二极耳部102伸出电池外壳200的内腔的方式不申请不做具体的限制。In other embodiments, when the battery case 200 is not provided with the first through hole 210a and the second through hole 210b, the first tab portion 101 of the bare cell 100 can pass through the top wall 210 and the peripheral side wall 220 of the battery case 200 The gap between them extends out of the inner cavity of the battery case 200, and the second tab part 102 of the bare cell 100 can also protrude out of the interior of the battery case 200 through the gap between the top wall 210 and the peripheral side wall 220 of the battery case 200. cavity. It should be understood that the manner in which the first lug portion 101 and the second lug portion 102 of the bare cell 100 extend out of the inner cavity of the battery casing 200 is not intended to be specifically limited.

另外，电解液300设置于电池外壳200的内腔。裸电芯100的至少部分设置在电解液300内。电解液300可以装满电池外壳200的内腔，也可以未装满电池外壳200的内腔。示例性地，电解液300可以为有机溶电解液、非有机电解液、或者固体电解质。In addition, the electrolyte solution 300 is disposed in the inner cavity of the battery case 200 . At least part of the bare cell 100 is disposed in the electrolyte 300 . The electrolyte solution 300 may fill the inner cavity of the battery case 200 or may not fill the inner cavity of the battery case 200 . Exemplarily, the electrolyte solution 300 may be an organic electrolyte solution, an inorganic electrolyte solution, or a solid electrolyte.

在其他实施方式中，电池1000还包括保护电路板(protection circuit modules,PCM)、或者电池管理***(battery management system,BMS)(图未示)。保护电路板可以连接于电池外壳200。第一极耳部101可以电连接于保护电路板的正极端。第二极耳部102可以电连接于保护电路板的负极端。示例性地，保护电路板的至少部分可以与电池外壳200的顶壁210相对设置。这样，第一极耳部101、第二极耳部102与保护电路板的连接方式较为简单。In other implementation manners, the battery 1000 further includes a protection circuit module (protection circuit modules, PCM), or a battery management system (battery management system, BMS) (not shown). A protection circuit board may be connected to the battery case 200 . The first tab portion 101 can be electrically connected to the positive end of the protection circuit board. The second tab portion 102 can be electrically connected to the negative terminal of the protection circuit board. Exemplarily, at least part of the protective circuit board may be disposed opposite to the top wall 210 of the battery case 200 . In this way, the connection method between the first tab part 101 , the second tab part 102 and the protection circuit board is relatively simple.

请参阅图3，并结合图2所示，图3是图2所示的裸电芯100的一种实施方式的部分分解示意图。裸电芯100包括第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d。其中，第一电极片100a具有第一极耳部101。第二电极片100c具有第二极耳部102。需要说明的是，为了简化附图，以使附图更清楚，图2示意了在Z轴方向第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d均包括四部分(例如，第一电极片100a的每一部分均用同一种类型的剖面线示意)。在其他实施方式中，在Z轴方向第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d的部分数不做具体的限定。Please refer to FIG. 3 , and in combination with FIG. 2 , FIG. 3 is a partially exploded schematic diagram of an implementation manner of the bare cell 100 shown in FIG. 2 . The bare cell 100 includes a first electrode sheet 100a, a first isolation film 100b, a second electrode sheet 100c and a second isolation film 100d. Wherein, the first electrode piece 100 a has a first tab portion 101 . The second electrode sheet 100c has a second tab portion 102 . It should be noted that, in order to simplify the drawings to make the drawings clearer, FIG. 2 shows that the first electrode sheet 100a, the first isolation film 100b, the second electrode sheet 100c and the second isolation film 100d all include Four parts (for example, each part of the first electrode sheet 100a is indicated by the same type of hatching). In other implementation manners, the number of parts of the first electrode sheet 100a, the first isolation film 100b, the second electrode sheet 100c and the second isolation film 100d in the Z-axis direction is not specifically limited.

可以理解的是，第一电极片100a与第二电极片100c可以是相同或相似结构、对称或部分对称结构、或者不同结构。示例性地，第二电极片100c与第一电极片100a为相似结构，第二电极片100c的部件结构的基础设计、部件之间的连接关系设计、及部件与组件之外的其他结构的连接关系设计，均可参阅第一电极片100a的相关方案，同时允许第二电极片100c与第一电极片100a在部件的细节结构或位置排布上有些许不同。另外，第一隔离膜100b与第二隔离膜100d也可以是相同或相似结构、对称或部分对称结构、或者不同结构。具体的本申请实施方式不做限定。It can be understood that the first electrode sheet 100a and the second electrode sheet 100c may have the same or similar structure, symmetrical or partially symmetrical structure, or different structures. Exemplarily, the second electrode sheet 100c has a similar structure to the first electrode sheet 100a, the basic design of the component structure of the second electrode sheet 100c, the design of the connection relationship between components, and the connection between components and other structures other than the assembly For the design of the relationship, refer to the related scheme of the first electrode sheet 100a, and at the same time, the second electrode sheet 100c and the first electrode sheet 100a are allowed to be slightly different in the detailed structure or position arrangement of the components. In addition, the first isolation film 100b and the second isolation film 100d may also have the same or similar structures, symmetrical or partially symmetrical structures, or different structures. The specific implementation manner of this application is not limited.

请再次参阅图2和图3，第一隔离膜100b设置在第一电极片100a与第二电极片100c之间。第一隔离膜100b用于将第一电极片100a和第二电极片100c隔开，以避免第一电极片100a和第二电极片100c短路。另外，第二隔离膜100d设置在第二电极片100c远离第一隔离膜100b的一侧。Please refer to FIG. 2 and FIG. 3 again, the first isolation film 100b is disposed between the first electrode sheet 100a and the second electrode sheet 100c. The first isolation film 100b is used to separate the first electrode sheet 100a from the second electrode sheet 100c, so as to avoid short circuit between the first electrode sheet 100a and the second electrode sheet 100c. In addition, the second isolation film 100d is disposed on a side of the second electrode sheet 100c away from the first isolation film 100b.

请参阅图3，第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d均呈卷曲状。这样，第二隔离膜100d也可以用于将第二电极片100c和第一电极片100a隔开，以避免第一电极片100a和第二电极片100c短路。可以理解的是，裸电芯100可以呈图3所示意的圆柱状，也可以为其他形状，例如跑道状、长方体、L形、缺口形、以及其他非规则形状等。具体的本申请不做限定。Please refer to FIG. 3 , the first electrode sheet 100 a , the first separator 100 b , the second electrode sheet 100 c and the second separator 100 d are all curled. In this way, the second separator 100d can also be used to separate the second electrode sheet 100c from the first electrode sheet 100a, so as to avoid a short circuit between the first electrode sheet 100a and the second electrode sheet 100c. It can be understood that the bare cell 100 can be in a cylindrical shape as shown in FIG. 3 , or in other shapes, such as a racetrack, a cuboid, an L shape, a notch shape, and other irregular shapes. The specific application is not limited.

上文介绍了裸电芯100的结构示意图。下文结合图3具体介绍裸电芯100的制备工艺的一种实施方式。The structure diagram of the bare cell 100 is introduced above. An implementation manner of the manufacturing process of the bare cell 100 will be described in detail below with reference to FIG. 3 .

将第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d依次层叠设置(定义为Z轴的正方向)；The first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c and the second separator 100d are sequentially stacked (defined as the positive direction of the Z axis);

将第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d沿第一方向(定义为X轴的负方向)卷绕，以使第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d形成卷曲状。The first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c, and the second separator 100d are wound along the first direction (defined as the negative direction of the X axis), so that the first electrode sheet 100a, the first The separator 100b, the second electrode sheet 100c, and the second separator 100d are formed in a rolled shape.

在本实施方式中，以第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d的堆叠方向为Z轴的正方向。以第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d的卷绕方向为X轴的负方向，以垂直于X轴和Z轴的方向为Y轴方向。其中，本申请实施例以第一方向为Y轴方向，第二方向为Z轴方向，第三方向为X轴方向为例。在其他实施方式中，可以理解的是，裸电芯100的坐标系也可以根据具体需求灵活设置。此时，第一方向、第二方向和第三方向可以灵活设置。In this embodiment, the positive direction of the Z-axis is defined as the stacking direction of the first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c and the second separator 100d. Take the winding direction of the first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c and the second separator 100d as the negative direction of the X-axis, and take the direction perpendicular to the X-axis and the Z-axis as the Y-axis direction. Wherein, in the embodiment of the present application, the first direction is the Y-axis direction, the second direction is the Z-axis direction, and the third direction is the X-axis direction as an example. In other implementation manners, it can be understood that the coordinate system of the bare cell 100 can also be flexibly set according to specific requirements. At this time, the first direction, the second direction and the third direction can be flexibly set.

上文结合相关附图具体介绍了电子设备1、电池1000以及裸电芯100的结构。可以理解的是，由于本实施方式的第一电极片100a与第二电极片100c的结构相同，下文将结合相关附图以第一电极片100a为例具体介绍第一电极片100a的结构。The structure of the electronic device 1 , the battery 1000 and the bare cell 100 has been specifically introduced above in conjunction with the relevant drawings. It can be understood that, since the structure of the first electrode sheet 100a and the second electrode sheet 100c in this embodiment are the same, the structure of the first electrode sheet 100a will be described in detail below by taking the first electrode sheet 100a as an example in combination with related drawings.

第一种实施方式：请参阅图4及图5a，图4是图3所示的第一电极片100a的一种实施方式的结构示意图。图5a是图4所示的第一电极片100a在A-A线处的部分剖面示意图。第一电极片100a包括集流体10、第一活性涂层20(以参阅图5a为主)、第二活性涂层30以及极耳40。其中，极耳40可以形成第一电极片100a的第一极耳部101(请参阅图3)。示例性地，第一电极片100a的宽度方向为Y轴方向。第一电极片100a的长度方向为X轴方向。第一电极片100a的厚度方向为Z轴方向。The first embodiment: please refer to FIG. 4 and FIG. 5 a , FIG. 4 is a schematic structural diagram of an embodiment of the first electrode sheet 100 a shown in FIG. 3 . FIG. 5a is a schematic partial cross-sectional view of the first electrode sheet 100a shown in FIG. 4 at the line A-A. The first electrode sheet 100 a includes a current collector 10 , a first active coating 20 (mainly referring to FIG. 5 a ), a second active coating 30 and tabs 40 . Wherein, the tab 40 may form the first tab portion 101 of the first electrode sheet 100a (see FIG. 3 ). Exemplarily, the width direction of the first electrode sheet 100a is the Y-axis direction. The length direction of the first electrode sheet 100a is the X-axis direction. The thickness direction of the first electrode sheet 100a is the Z-axis direction.

其中，集流体10包括绝缘层11、第一导电层12和第二导电层13。绝缘层11包括背向设置的第一表面113和第二表面114。第一导电层12设于第一表面113。第二导电层13设于第二表面114。此时，第一导电层12和第二导电层13分别位于绝缘层11的两侧。可以理解的是，当从Y轴方向看图4的集流体10时，也可以看出集流体10包括绝缘层11、第一导电层12和第二导电层13。可以理解的是，由于集流体10可以同时包括绝缘层11、第一导电层12和第二导电层13，集流体10也可以称为复合集流体。Wherein, the current collector 10 includes an insulating layer 11 , a first conductive layer 12 and a second conductive layer 13 . The insulating layer 11 includes a first surface 113 and a second surface 114 disposed opposite to each other. The first conductive layer 12 is disposed on the first surface 113 . The second conductive layer 13 is disposed on the second surface 114 . At this time, the first conductive layer 12 and the second conductive layer 13 are respectively located on two sides of the insulating layer 11 . It can be understood that when the current collector 10 in FIG. 4 is viewed from the Y-axis direction, it can also be seen that the current collector 10 includes an insulating layer 11 , a first conductive layer 12 and a second conductive layer 13 . It can be understood that since the current collector 10 may include the insulating layer 11 , the first conductive layer 12 and the second conductive layer 13 at the same time, the current collector 10 may also be called a composite current collector.

示例性地，绝缘层11的材质可以为聚乙烯(polyethene，PE)、聚对苯二甲酸乙二醇酯(polyethylene terephthalate，PET)、聚丙烯(PP)、聚酰亚胺(PI)以及聚醚醚酮(poly(ether-ether-ketone)，PEEK)等中的至少一种。第一导电层12的材质可以为铜、铝、钛、不锈钢、其他金属合金、碳、石墨中的一种或者多种。第二导电层13的材质也可以为铜、铝、钛、不锈钢、其他金属合金、碳、石墨中的一种或者多种。Exemplarily, the material of the insulating layer 11 can be polyethylene (polyethene, PE), polyethylene terephthalate (polyethylene terephthalate, PET), polypropylene (PP), polyimide (PI) and polyethylene At least one of ether ether ketone (poly (ether-ether-ketone), PEEK) and the like. The material of the first conductive layer 12 may be one or more of copper, aluminum, titanium, stainless steel, other metal alloys, carbon, and graphite. The material of the second conductive layer 13 may also be one or more of copper, aluminum, titanium, stainless steel, other metal alloys, carbon, and graphite.

请再次参阅图4和图5a，集流体10包括涂层部14和非涂层部15。非涂层部15连接于涂层部14。在本实施方式中，非涂层部15位于涂层部14的端部。非涂层部15位于涂层部14的外侧。可以理解的是，集流体10的非涂层部15包括绝缘层11的一部分(也即非涂层部15的绝缘层111)、第一导电层12的一部分(也即非涂层部15的第一导电层121)和第二导电层13的一部分(也即非涂层部15的第二导电层131)。集流体10的涂层部14包括绝缘层11的另一部分(也即涂层部14的绝缘层112)、第一导电层12的另一部分(也即涂层部14的第一导电层122)和第二导电层13的另一部分(也即涂层部14的第二导电层132)。可以理解的是，当从Z轴方向看图4的集流体10时，也可以看到集流体10包括涂层部14和非涂层部15。Referring to FIG. 4 and FIG. 5 a again, the current collector 10 includes a coated portion 14 and a non-coated portion 15 . The non-coated portion 15 is connected to the coated portion 14 . In the present embodiment, the non-coated portion 15 is located at the end of the coated portion 14 . The non-coated portion 15 is located outside the coated portion 14 . It can be understood that the non-coating portion 15 of the current collector 10 includes a part of the insulating layer 11 (that is, the insulating layer 111 of the non-coating portion 15), a part of the first conductive layer 12 (that is, the non-coating portion 15). The first conductive layer 121) and a part of the second conductive layer 13 (that is, the second conductive layer 131 of the non-coating portion 15). The coating part 14 of the current collector 10 includes another part of the insulating layer 11 (that is, the insulating layer 112 of the coating part 14), and another part of the first conductive layer 12 (that is, the first conductive layer 122 of the coating part 14). and another part of the second conductive layer 13 (ie, the second conductive layer 132 of the coating portion 14). It can be understood that, when viewing the current collector 10 in FIG. 4 from the Z-axis direction, it can also be seen that the current collector 10 includes a coated portion 14 and a non-coated portion 15 .

在本实施方式中，涂层部14的第一导电层122远离涂层部14的绝缘层112的表面为涂层部14的第一面141。涂层部14的第二导电层132远离涂层部14的绝缘层112的表面为涂层部14的第二面142。In this embodiment, the surface of the first conductive layer 122 of the coating portion 14 away from the insulating layer 112 of the coating portion 14 is the first surface 141 of the coating portion 14 . The surface of the second conductive layer 132 of the coating portion 14 away from the insulating layer 112 of the coating portion 14 is the second surface 142 of the coating portion 14 .

其中，第一活性涂层20可以设于第一面141，也即第一活性涂层20位于所述涂层部14的第一导电层122。第二活性涂层30可以设于第二面142，也即第二活性涂层30位于所述涂层部14的第二导电层132。这样，在Z轴的正方向上，第一活性涂层20、涂层部14的第一导电层122、涂层部14的绝缘层112、涂层部14的第二导电层132以及第二活性涂层30依次层叠设置。可以理解的是，集流体10的涂层部14设有第一活性涂层20和第二活性涂层30。集流体10的非涂层部15没有设置第一活性涂层20和第二活性涂层30。Wherein, the first active coating 20 may be disposed on the first surface 141 , that is, the first active coating 20 is located on the first conductive layer 122 of the coating portion 14 . The second active coating 30 can be disposed on the second surface 142 , that is, the second active coating 30 is located on the second conductive layer 132 of the coating portion 14 . In this way, in the positive direction of the Z axis, the first active coating 20, the first conductive layer 122 of the coating portion 14, the insulating layer 112 of the coating portion 14, the second conductive layer 132 of the coating portion 14, and the second active layer The coating layers 30 are stacked in sequence. It can be understood that the coating portion 14 of the current collector 10 is provided with a first active coating 20 and a second active coating 30 . The non-coating portion 15 of the current collector 10 is not provided with the first active coating layer 20 and the second active coating layer 30 .

在本实施方式中，第一电极片100a的厚度方向(也即第一活性涂层20、集流体10、第二活性涂层30的堆叠方向)为Z轴的正方向。集流体10的非涂层部15朝向集流体10的涂层部14的方向为X轴的正方向。In this embodiment, the thickness direction of the first electrode sheet 100 a (that is, the stacking direction of the first active coating layer 20 , the current collector 10 and the second active coating layer 30 ) is the positive direction of the Z axis. The direction of the non-coated portion 15 of the current collector 10 toward the coated portion 14 of the current collector 10 is the positive direction of the X-axis.

请再次参阅图5a，集流体10的非涂层部15包括弯折部分151以及平坦部分152。非涂层部15的弯折部分151包括绝缘层11的一部分(也即弯折部分151的绝缘层1111)、第一导电层12的一部分(也即弯折部分151的第一导电层1211)和第二导电层13的一部分(也即弯折部分151的第二导电层1311)。Referring to FIG. 5 a again, the non-coated portion 15 of the current collector 10 includes a bent portion 151 and a flat portion 152 . The bent part 151 of the non-coating part 15 includes a part of the insulating layer 11 (that is, the insulating layer 1111 of the bent part 151), a part of the first conductive layer 12 (that is, the first conductive layer 1211 of the bent part 151) and a part of the second conductive layer 13 (that is, the second conductive layer 1311 of the bent portion 151).

另外，非涂层部15的平坦部分152包括绝缘层11的一部分(也即平坦部分152的绝缘层1112)、第一导电层12的一部分(也即平坦部分152的第一导电层1212)和第二导电层13的一部分(也即平坦部分152的第二导电层1312)。图5a通过虚线示意性地区分弯折部分151以及平坦部分152。In addition, the flat part 152 of the non-coating part 15 includes a part of the insulating layer 11 (that is, the insulating layer 1112 of the flat part 152), a part of the first conductive layer 12 (that is, the first conductive layer 1212 of the flat part 152) and A part of the second conductive layer 13 (that is, the second conductive layer 1312 of the flat portion 152 ). Fig. 5a schematically distinguishes the bent portion 151 and the flat portion 152 by dashed lines.

请参阅图5b，图5b是图5a所示的第一电极片100a在P处的放大示意图。弯折部分151的绝缘层1111包括第一段11a(也即弯折部分151的第一端的一部分)以及第二段11b(也即弯折部分151的第二端的一部分)。弯折部分151的绝缘层1111的第一段11a连接于弯折部分151的绝缘层1111的第二段11b与平坦部分152的第二端的绝缘层1112之间。弯折部分151的绝缘层1111的第二段11b与平坦部分152的绝缘层1112相对设置。示例性地，弯折部分151的绝缘层1111呈“Г”状。图5a通过虚线示意性地区分第一段11a、第二段11b以及平坦部分152的绝缘层1112。Please refer to FIG. 5b. FIG. 5b is an enlarged schematic diagram of the first electrode sheet 100a shown in FIG. 5a at point P. Referring to FIG. The insulating layer 1111 of the bent portion 151 includes a first segment 11a (ie, a portion of the first end of the bent portion 151 ) and a second segment 11b (ie, a portion of the second end of the bent portion 151 ). The first segment 11 a of the insulating layer 1111 of the bent portion 151 is connected between the second segment 11 b of the insulating layer 1111 of the bent portion 151 and the insulating layer 1112 of the second end of the flat portion 152 . The second segment 11 b of the insulating layer 1111 of the bent portion 151 is opposite to the insulating layer 1112 of the flat portion 152 . Exemplarily, the insulating layer 1111 of the bent portion 151 is in a "Γ" shape. FIG. 5 a schematically distinguishes the first section 11 a , the second section 11 b and the insulating layer 1112 of the flat portion 152 by dotted lines.

另外，弯折部分151的第一导电层1211包括第一段12a(也即弯折部分151的第一端的一部分)以及第二段12b(也即弯折部分151的第二端的一部分)。弯折部分151的第一导电层1211的第一段12a连接于弯折部分151的第一导电层1211的第二段12b与平坦部分152的第二端的第一导电层1212之间。弯折部分151的第一导电层1211的第二段12b与平坦部分152的第一导电层1212相对设置。示例性地，弯折部分151的第一导电层1211呈“Г”状。图5a通过虚线示意性地区分第一段12a、第二段12b以及平坦部分152的第一导电层1212。In addition, the first conductive layer 1211 of the bent portion 151 includes a first segment 12a (ie, a part of the first end of the bent portion 151 ) and a second segment 12b (ie, a part of the second end of the bent portion 151 ). The first segment 12 a of the first conductive layer 1211 of the bent portion 151 is connected between the second segment 12 b of the first conductive layer 1211 of the bent portion 151 and the first conductive layer 1212 of the second end of the flat portion 152 . The second section 12 b of the first conductive layer 1211 of the bent portion 151 is opposite to the first conductive layer 1212 of the flat portion 152 . Exemplarily, the first conductive layer 1211 of the bent portion 151 is in a "Γ" shape. Fig. 5a schematically distinguishes the first segment 12a, the second segment 12b and the first conductive layer 1212 of the flat part 152 by dashed lines.

另外，弯折部分151的第二导电层1311包括第一段13a(也即弯折部分151的第一端的一部分)以及第二段13b(也即弯折部分151的第二端的一部分)。弯折部分151的第二导电层1311的第一段13a连接于弯折部分151的第二导电层1311的第二段13b与平坦部分152的第二端的第二导电层1312之间。弯折部分151的第二导电层1311的第二段13b与平坦部分152的第二导电层1312相对设置。示例性地，弯折部分151的第二导电层1311呈“Г”状。图5a通过虚线示意性地区分第一段13a、第二段13b以及平坦部分152的第二导电层1312。In addition, the second conductive layer 1311 of the bent portion 151 includes a first segment 13a (ie, a part of the first end of the bent portion 151 ) and a second segment 13b (ie, a part of the second end of the bent portion 151 ). The first segment 13 a of the second conductive layer 1311 of the bent portion 151 is connected between the second segment 13 b of the second conductive layer 1311 of the bent portion 151 and the second conductive layer 1312 of the second end of the flat portion 152 . The second segment 13 b of the second conductive layer 1311 of the bent portion 151 is opposite to the second conductive layer 1312 of the flat portion 152 . Exemplarily, the second conductive layer 1311 of the bent portion 151 is in a "Γ" shape. Fig. 5a schematically distinguishes the first section 13a, the second section 13b and the second conductive layer 1312 of the flat part 152 by dashed lines.

另外，平坦部分152的第一端的绝缘层1112连接于涂层部14的绝缘层112。平坦部分152的第一端的第一导电层1212连接于涂层部14的第一导电层122。平坦部分152的第一端的第二导电层1312连接于涂层部14的第二导电层132。这样，平坦部分152的第一端连接于涂层部14。In addition, the insulating layer 1112 of the first end of the flat part 152 is connected to the insulating layer 112 of the coating part 14 . The first conductive layer 1212 at the first end of the flat portion 152 is connected to the first conductive layer 122 of the coating portion 14 . The second conductive layer 1312 at the first end of the flat portion 152 is connected to the second conductive layer 132 of the coating portion 14 . In this way, the first end of the flat part 152 is connected to the coating part 14 .

请再次参阅图5a，在Z轴方向上，非涂层部15的弯折部分151层叠于非涂层部15的平坦部分152。弯折部分151的第二导电层1311的第二段13b与平坦部分152的第二导电层1312接触。在其他实施方式中，弯折部分151的第二导电层1311的第二段13b与平坦部分152的第二导电层1312也可以不接触，例如在弯折部分151的第二导电层1311的第二段13b与平坦部分152的第二导电层1312之间设置其他的层结构。Please refer to FIG. 5 a again, in the Z-axis direction, the bent portion 151 of the non-coating portion 15 is stacked on the flat portion 152 of the non-coating portion 15 . The second segment 13 b of the second conductive layer 1311 of the bent portion 151 is in contact with the second conductive layer 1312 of the flat portion 152 . In other implementation manners, the second section 13b of the second conductive layer 1311 of the bent portion 151 may not be in contact with the second conductive layer 1312 of the flat portion 152, for example, at the second segment 13b of the second conductive layer 1311 of the bent portion 151, Another layer structure is disposed between the second segment 13 b and the second conductive layer 1312 of the flat portion 152 .

请再次参阅图4，弯折部分151在X-Y平面(也即基准面)投影的面积小于平坦部分152在X-Y平面的投影的面积。其中，基准面为涂层部14所在平面。另外，在Y轴方向，非涂层部15的弯折部分151的尺寸L1小于非涂层部15的平坦部分152的尺寸L2。在本实施方式中，非涂层部15的弯折部分151的尺寸L1为与平坦部分152连接的弯折部分151的边长的尺寸。示例性地，在Y轴方向，非涂层部15的弯折部分151的尺寸L1等于非涂层部15的平坦部分152的尺寸L2的一半。Please refer to FIG. 4 again, the projected area of the bent portion 151 on the X-Y plane (ie, the reference plane) is smaller than the projected area of the flat portion 152 on the X-Y plane. Wherein, the reference plane is the plane where the coating part 14 is located. In addition, in the Y-axis direction, the dimension L1 of the bent portion 151 of the non-coating portion 15 is smaller than the dimension L2 of the flat portion 152 of the non-coating portion 15 . In this embodiment, the dimension L1 of the bent portion 151 of the non-coating portion 15 is the dimension of the side length of the bent portion 151 connected to the flat portion 152 . Exemplarily, in the Y-axis direction, the dimension L1 of the bent portion 151 of the non-coating portion 15 is equal to half of the dimension L2 of the flat portion 152 of the non-coating portion 15 .

请再次参阅图4，极耳40可以呈条形状。极耳40的材质可以为镍、铜、铝、铜镀镍、不锈钢、铝合金、铜铝复合带或涂有碳层的金属带等导电材料中的一种或者多种。在其他实施方式中，极耳40的形状与材质不做具体的限定。Please refer to FIG. 4 again, the tab 40 may be in the shape of a bar. The material of the tab 40 can be one or more of conductive materials such as nickel, copper, aluminum, nickel-plated copper, stainless steel, aluminum alloy, copper-aluminum composite strip, or metal strip coated with carbon layer. In other embodiments, the shape and material of the tab 40 are not specifically limited.

请再次参阅图4、图5a和图5b，极耳40固定于弯折部分151的第一导电层1211的第二段12b，且电连接于弯折部分151的第一导电层1211的第二段12b。此时，极耳40可以通过弯折部分151的第一导电层1211的第二段12b、弯折部分151的第一导电层1211的第一段12a以及平坦部分152的第一导电层1212电连接至涂层部14的第一导电层122。示例性地，通过超声波焊接工艺或者其他焊接工艺，以将极耳40固定于非涂层部15的弯折部分151的第一导电层1211。在本实施方式中，弯折部分151为矩形状。在其他实施方式中，弯折部分151也可以为三角形或者其他形状，弯折部分151的形状可以保证容置至少一个用于电连接极耳40与弯折部分151的焊点形状。Please refer to FIG. 4, FIG. 5a and FIG. 5b again, the tab 40 is fixed to the second segment 12b of the first conductive layer 1211 of the bent portion 151, and is electrically connected to the second segment of the first conductive layer 1211 of the bent portion 151. Paragraph 12b. At this time, the tab 40 can pass through the second section 12b of the first conductive layer 1211 of the bent part 151, the first section 12a of the first conductive layer 1211 of the bent part 151, and the first conductive layer 1212 of the flat part 152. Connected to the first conductive layer 122 of the coating portion 14 . Exemplarily, the tab 40 is fixed to the first conductive layer 1211 of the bent portion 151 of the non-coating portion 15 by an ultrasonic welding process or other welding processes. In this embodiment, the bent portion 151 has a rectangular shape. In other embodiments, the bent portion 151 may also be triangular or other shapes, and the shape of the bent portion 151 can accommodate at least one solder joint shape for electrically connecting the tab 40 and the bent portion 151 .

请参阅图6和图4，图6是图4所示的第一电极片100a在B-B线处的部分剖面示意图。极耳40还固定于平坦部分152的第二导电层1312，且电连接于平坦部分152的第二导电层1312。此时，极耳40可以通过平坦部分152的第二导电层1312电连接至涂层部14的第二导电层132。示例性地，通过超声波焊接工艺或者其他焊接工艺，以将极耳40固定于非涂层部15的平坦部分152的第二导电层1312。在本实施方式中，平坦部分152为矩形状。在其他实施方式中，平坦部分152也可以为三角形或者其他形状，平坦部分152的形状可以保证容置至少一个用于电连接极耳40与平坦部分152的焊点形状。Please refer to FIG. 6 and FIG. 4 . FIG. 6 is a partial cross-sectional view of the first electrode sheet 100 a shown in FIG. 4 at the line B-B. The tab 40 is also fixed to the second conductive layer 1312 of the flat portion 152 and electrically connected to the second conductive layer 1312 of the flat portion 152 . At this time, the tab 40 may be electrically connected to the second conductive layer 132 of the coating part 14 through the second conductive layer 1312 of the flat part 152 . Exemplarily, the tab 40 is fixed to the second conductive layer 1312 of the flat portion 152 of the non-coating portion 15 by an ultrasonic welding process or other welding process. In this embodiment, the flat portion 152 has a rectangular shape. In other embodiments, the flat portion 152 can also be triangular or other shapes, and the shape of the flat portion 152 can guarantee to accommodate at least one solder joint shape for electrically connecting the tab 40 and the flat portion 152 .

请再次参阅图4，在本实施方式中，极耳40的延伸方向可以垂直于集流体10的延伸方向，也即极耳40的延伸方向可以平行于Y轴方向。Please refer to FIG. 4 again. In this embodiment, the extending direction of the tab 40 may be perpendicular to the extending direction of the current collector 10 , that is, the extending direction of the tab 40 may be parallel to the Y-axis direction.

另外，极耳40与弯折部分151的第一导电层1211的连接位置为第一位置M。极耳40与平坦部分152的第二导电层1312的连接位置为第二位置N。第一位置M与第二位置N的排布方向可以平行于Y轴的正方向。可以理解的是，图4通过圆虚线示意性地给出第一位置M和第二位置N。但第一位置M和第二位置N的形状和大小不限于图4所示意的形状和大小。此外，第一位置M与第二位置N的排布方向也不限于图4所示意的方向。In addition, the connection position between the tab 40 and the first conductive layer 1211 of the bent portion 151 is the first position M. As shown in FIG. The connection position between the tab 40 and the second conductive layer 1312 of the flat portion 152 is the second position N. The arrangement direction of the first position M and the second position N may be parallel to the positive direction of the Y axis. It can be understood that, Fig. 4 schematically shows the first position M and the second position N by the dotted line of the circle. But the shape and size of the first position M and the second position N are not limited to those shown in FIG. 4 . In addition, the arrangement direction of the first position M and the second position N is not limited to the direction shown in FIG. 4 .

可以理解的是，本实施方式通过将集流体10的非涂层部15的部分设置成弯折部分151，以使弯折部分151的第一导电层1211的第二段12b与平坦部分152的第二导电层1312朝向同一侧。这样，通过极耳40固定且电连接弯折部分151的第一导电层1211，极耳40固定且电连接平坦部分152的第二导电层1312，从而使得极耳40可以同时固定且电连接集流体10的第一导电层12与第二导电层13。这样，当第一电极片100a应用于电池1000时，第一活性涂层20和第二活性涂层30均可以实现导通，从而避免第一活性涂层20和第二活性涂层30中的一个因不工作而导致电池1000的容量的损失。另外，相较于第二活性涂层通过穿刺过孔等方式与极耳电连接的方案，本申请的电池1000不容易出现高阻态问题，不会影响电池的容量发挥和安全性能。It can be understood that, in this embodiment, the part of the non-coating part 15 of the current collector 10 is set as the bent part 151, so that the second segment 12b of the first conductive layer 1211 of the bent part 151 is connected to the flat part 152. The second conductive layer 1312 faces the same side. In this way, the tab 40 fixes and electrically connects the first conductive layer 1211 of the bent portion 151, and the tab 40 fixes and electrically connects the second conductive layer 1312 of the flat portion 152, so that the tab 40 can be simultaneously fixed and electrically connected to the set. The first conductive layer 12 and the second conductive layer 13 of the fluid 10 . In this way, when the first electrode sheet 100a is applied to the battery 1000, both the first active coating 20 and the second active coating 30 can realize conduction, thereby avoiding the first active coating 20 and the second active coating 30 A loss of battery 1000 capacity due to inactivity. In addition, compared with the scheme in which the second active coating is electrically connected to the tabs by piercing through holes, the battery 1000 of the present application is not prone to high-resistance problems, and will not affect the capacity and safety performance of the battery.

另外，通过将第一位置M与第二位置N的排布方向平行于Y轴的正方向设置时，非涂层部15在X轴方向上的尺寸可以不用提供较大的尺寸来与极耳40固定，也即非涂层部15在X轴方向上的尺寸可以较大程度地减小。此时，涂层部14在X轴方向上的尺寸可以较大程度地提高，也即第一活性涂层20和第二活性涂层30在X轴方向上的尺寸可以较大程度地提高。这样，当第一电极片100a应用于电池1000时，有利于提高的电池1000的容量。In addition, when the arrangement direction of the first position M and the second position N is parallel to the positive direction of the Y-axis, the size of the non-coating part 15 in the direction of the X-axis can be matched with the tab without providing a larger size. 40 is fixed, that is, the size of the non-coating portion 15 in the X-axis direction can be greatly reduced. At this time, the size of the coating part 14 in the X-axis direction can be greatly increased, that is, the dimensions of the first active coating layer 20 and the second active coating layer 30 in the X-axis direction can be greatly increased. In this way, when the first electrode sheet 100 a is applied to the battery 1000 , it is beneficial to improve the capacity of the battery 1000 .

在其他实施方式中，极耳40的延伸方向不仅限于图4所示意的沿Y轴方向延伸。极耳40也可以沿其他方向延伸。例如，请参阅图7，图7是图3所示的第一电极片100a的另一种实施方式的结构示意图。极耳40的延伸方向可以平行于集流体10的延伸方向，也即极耳40的延伸方向可以平行于X轴方向。其中，极耳40与集流体10的连接位置(第一位置M和第二位置N)可以不变。In other embodiments, the extending direction of the tab 40 is not limited to extending along the Y-axis as shown in FIG. 4 . The tab 40 can also extend in other directions. For example, please refer to FIG. 7 , which is a schematic structural diagram of another embodiment of the first electrode sheet 100 a shown in FIG. 3 . The extension direction of the tab 40 may be parallel to the extension direction of the current collector 10 , that is, the extension direction of the tab 40 may be parallel to the X-axis direction. Wherein, the connection positions (the first position M and the second position N) of the tab 40 and the current collector 10 may not change.

上文结合相关附图具体介绍了一种第一电极片100a的结构示意图。下文将结合相关附图具体介绍第一电极片100a的形成过程。A schematic structural view of the first electrode sheet 100a has been specifically introduced above in conjunction with the relevant drawings. The forming process of the first electrode sheet 100a will be described in detail below in conjunction with related drawings.

步骤1，请参阅图8和图9，图8是本申请实施例的第一电极片100a在加工过程中的一种实施方式的结构示意图。图9是图8所示的第一电极片100a在加工过程中的结构在C-C线处的部分剖面示意图。在绝缘层11的第一表面113形成第一导电层12，以及在绝缘层11的第二表面114形成第二导电层13，以形成待加工件。其中，待加工件包括涂层部14和连接于涂层部14的非涂层部15。涂层部14包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。非涂层部15包括绝缘层11的另一部分、第一导电层12的另一部分和第二导电层13的另一部分。在本实施方式中，非涂层部15位于涂层部14的端部。Step 1, please refer to FIG. 8 and FIG. 9. FIG. 8 is a schematic structural diagram of an implementation manner of the first electrode sheet 100a in the embodiment of the present application during processing. FIG. 9 is a schematic partial cross-sectional view of the structure of the first electrode sheet 100a shown in FIG. 8 at line C-C during processing. The first conductive layer 12 is formed on the first surface 113 of the insulating layer 11 , and the second conductive layer 13 is formed on the second surface 114 of the insulating layer 11 to form a workpiece to be processed. Wherein, the workpiece to be processed includes a coated portion 14 and a non-coated portion 15 connected to the coated portion 14 . The coating portion 14 includes a part of the insulating layer 11 , a part of the first conductive layer 12 , and a part of the second conductive layer 13 . The non-coating portion 15 includes another part of the insulating layer 11 , another part of the first conductive layer 12 , and another part of the second conductive layer 13 . In the present embodiment, the non-coated portion 15 is located at the end of the coated portion 14 .

步骤2，请参阅图10，并结合图9所示，图10是图8所示的第一电极片100a在加工过程中的结构在裁切后的结构示意图。对待加工件的非涂层部15进行裁切，以使在Y轴方向，非涂层部15的弯折部分151的尺寸小于非涂层部15的平坦部分152的尺寸。其中，平坦部分152连接于弯折部分151。可以理解的是，弯折部分151包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。平坦部分152包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。示例性地，在Y轴方向，非涂层部15的弯折部分151的尺寸等于非涂层部15的平坦部分152的尺寸的一半。Step 2, please refer to FIG. 10 , and in combination with FIG. 9 , FIG. 10 is a schematic structural diagram of the structure of the first electrode sheet 100 a shown in FIG. 8 during processing and after cutting. The non-coated part 15 of the workpiece to be processed is cut so that the size of the bent part 151 of the non-coated part 15 is smaller than the size of the flat part 152 of the non-coated part 15 in the Y-axis direction. Wherein, the flat portion 152 is connected to the bent portion 151 . It can be understood that the bent portion 151 includes a part of the insulating layer 11 , a part of the first conductive layer 12 and a part of the second conductive layer 13 . The flat part 152 includes a part of the insulating layer 11 , a part of the first conductive layer 12 and a part of the second conductive layer 13 . Exemplarily, in the Y-axis direction, the size of the bent portion 151 of the non-coating portion 15 is equal to half the size of the flat portion 152 of the non-coating portion 15 .

在其他实施方式中，第一电极片100a的形成步骤也可以没有步骤2。此时在步骤1中，可以采用一定形状的绝缘层11，从而在绝缘层11上形成第一导电层12和第二导电层13之后，在Y轴方向，非涂层部15的弯折部分151的尺寸小于非涂层部15的平坦部分152的尺寸。In other implementation manners, the step 2 may not be included in the step of forming the first electrode sheet 100a. At this time, in step 1, an insulating layer 11 of a certain shape can be used, so that after the first conductive layer 12 and the second conductive layer 13 are formed on the insulating layer 11, in the Y-axis direction, the bent portion of the non-coating portion 15 The size of 151 is smaller than that of the flat portion 152 of the non-coating portion 15 .

步骤3，请参阅图5a，在涂层部14的第一面141形成第一活性涂层20，以及在集流体10的涂层部14的第二面142形成第二活性涂层30。应理解，涂层部14的第一面141为涂层部14的第一导电层122远离涂层部14的绝缘层112的表面。涂层部14的第二面142为涂层部14的第二导电层132远离涂层部14的绝缘层112的表面。Step 3, please refer to FIG. 5 a , forming the first active coating 20 on the first surface 141 of the coating portion 14 , and forming the second active coating 30 on the second surface 142 of the coating portion 14 of the current collector 10 . It should be understood that the first surface 141 of the coating portion 14 is the surface of the first conductive layer 122 of the coating portion 14 away from the insulating layer 112 of the coating portion 14 . The second surface 142 of the coating portion 14 is a surface of the second conductive layer 132 of the coating portion 14 away from the insulating layer 112 of the coating portion 14 .

步骤4，请参阅图4和图5a，将非涂层部15的弯折部分151弯折，以使弯折部分151的至少部分层叠于平坦部分152，形成集流体10。应理解，非涂层部15的弯折部分151的第一导电层1211与非涂层部15的平坦部分152的第二导电层1312朝向同一侧。 Step 4, please refer to FIG. 4 and FIG. 5 a , bend the bent portion 151 of the non-coated portion 15 so that at least part of the bent portion 151 is stacked on the flat portion 152 to form the current collector 10 . It should be understood that the first conductive layer 1211 of the bent portion 151 of the non-coating portion 15 faces the same side as the second conductive layer 1312 of the flat portion 152 of the non-coating portion 15 .

步骤5，请参阅图4至图6，将极耳40固定于非涂层部15的弯折部分151的第一导电层1211，且电连接于非涂层部15的弯折部分151的第一导电层1211，以及将极耳40固定于非涂层部15的平坦部分152的第二导电层1312，且电连接于非涂层部15的平坦部分152的第二导电层1312。示例性地，通过超声波焊接工艺或者其他焊接工艺，以将极耳40同时固定于非涂层部15的弯折部分151的第一导电层1211和非涂层部15的平坦部分152的第二导电层1312。Step 5, please refer to FIG. 4 to FIG. 6, fix the tab 40 on the first conductive layer 1211 of the bent portion 151 of the non-coated portion 15, and electrically connect to the first conductive layer 1211 of the bent portion 151 of the non-coated portion 15. A conductive layer 1211 , and a second conductive layer 1312 that fixes the tab 40 to the flat portion 152 of the uncoated portion 15 and is electrically connected to the second conductive layer 1312 of the flat portion 152 of the uncoated portion 15 . Exemplarily, the tab 40 is simultaneously fixed to the first conductive layer 1211 of the bent portion 151 of the non-coating portion 15 and the second conductive layer 1211 of the flat portion 152 of the non-coating portion 15 through an ultrasonic welding process or other welding processes. conductive layer 1312 .

在其他实施方式中，步骤3和步骤4的顺序可以对调，或者同时进行。In other embodiments, the order of step 3 and step 4 can be reversed, or performed simultaneously.

第二种实施方式中，与第一种实施方式相同的技术内容不再赘述：请参阅图11，图11是图3所示的第一电极片100a的再一种实施方式的结构示意图。集流体10的非涂层部15连接于集流体10的涂层部14的中部。在本实施方式中，集流体10的非涂层部15的结构、集流体10的涂层部14的结构以及极耳40的结构均可以参阅第一种实施方式的集流体10的非涂层部15的结构、集流体10的涂层部14的结构以及极耳40的结构(请参阅图4至图7)。另外，极耳40与集流体10的非涂层部15的连接方式也可以参阅第一种实施方式的极耳40与集流体10的非涂层部15的连接方式(请参阅图4至图7)。具体的本实施方式不再赘述。In the second embodiment, the same technical content as the first embodiment will not be repeated: please refer to FIG. 11 , which is a schematic structural diagram of another embodiment of the first electrode sheet 100a shown in FIG. 3 . The non-coated portion 15 of the current collector 10 is connected to the middle of the coated portion 14 of the current collector 10 . In this embodiment, the structure of the non-coated part 15 of the current collector 10, the structure of the coated part 14 of the current collector 10, and the structure of the tab 40 can all refer to the non-coated part of the current collector 10 of the first embodiment. The structure of the portion 15, the structure of the coating portion 14 of the current collector 10, and the structure of the tab 40 (see FIGS. 4 to 7). In addition, the connection method between the tab 40 and the non-coated part 15 of the current collector 10 can also refer to the connection method between the tab 40 and the non-coated part 15 of the current collector 10 in the first embodiment (see FIGS. 7). The specific implementation manner will not be repeated here.

可以理解的是，本实施方式的极耳40可以同时固定连接于集流体10的第一导电层12与第二导电层13，且电连接于集流体10的第一导电层12与第二导电层13。It can be understood that the tab 40 of this embodiment can be fixedly connected to the first conductive layer 12 and the second conductive layer 13 of the current collector 10 at the same time, and electrically connected to the first conductive layer 12 and the second conductive layer 13 of the current collector 10 Layer 13.

在其他实施方式中，集流体10的非涂层部15也可以与集流体10的涂层部14的其他位置连接。In other embodiments, the non-coated portion 15 of the current collector 10 may also be connected to other positions of the coated portion 14 of the current collector 10 .

第三种实施方式中，与第一种实施方式相同的技术内容不再赘述：请参阅图12和图13，图12是图3所示的第一电极片100a的再一种实施方式的结构示意图。图13是图12所示的第一电极片100a在D-D线处的部分剖面示意图。在Y轴方向，非涂层部15的弯折部分151的尺寸L1等于非涂层部15的平坦部分152的尺寸L2。在本实施方式中，非涂层部15的弯折部分151的尺寸L1为与平坦部分152连接的弯折部分151的边长的尺寸。另外，在X轴方向，非涂层部15的弯折部分151的尺寸D1小于非涂层部15的平坦部分152的尺寸D2。示例性地，在X轴方向，非涂层部15的弯折部分151的尺寸D1等于非涂层部15的平坦部分 152的尺寸D2的一半。In the third embodiment, the same technical content as the first embodiment will not be repeated: please refer to Figure 12 and Figure 13, Figure 12 is the structure of another embodiment of the first electrode sheet 100a shown in Figure 3 schematic diagram. FIG. 13 is a schematic partial cross-sectional view of the first electrode sheet 100a shown in FIG. 12 at the line D-D. In the Y-axis direction, the dimension L1 of the bent portion 151 of the non-coating portion 15 is equal to the dimension L2 of the flat portion 152 of the non-coating portion 15 . In this embodiment, the dimension L1 of the bent portion 151 of the non-coating portion 15 is the dimension of the side length of the bent portion 151 connected to the flat portion 152 . In addition, in the X-axis direction, the dimension D1 of the bent portion 151 of the non-coating portion 15 is smaller than the dimension D2 of the flat portion 152 of the non-coating portion 15 . Exemplarily, in the X-axis direction, the dimension D1 of the bent portion 151 of the non-coating portion 15 is equal to half the dimension D2 of the flat portion 152 of the non-coating portion 15 .

在本实施方式中，集流体10的非涂层部15的结构、集流体10的涂层部14的结构以及极耳40的结构均可以参阅第一种实施方式的集流体10的非涂层部15的结构、集流体10的涂层部14的结构以及极耳40的结构(请参阅图4至图7)。另外，极耳40与集流体10的非涂层部15的连接方式也可以参阅第一种实施方式的极耳40与集流体10的非涂层部15的连接方式(请参阅图4至图7)。具体的本实施方式不再赘述。In this embodiment, the structure of the non-coated part 15 of the current collector 10, the structure of the coated part 14 of the current collector 10, and the structure of the tab 40 can all refer to the non-coated part of the current collector 10 of the first embodiment. The structure of the portion 15, the structure of the coating portion 14 of the current collector 10, and the structure of the tab 40 (see FIGS. 4 to 7). In addition, the connection method between the tab 40 and the non-coated part 15 of the current collector 10 can also refer to the connection method between the tab 40 and the non-coated part 15 of the current collector 10 in the first embodiment (see FIGS. 7). The specific implementation manner will not be repeated here.

在本实施方式中，第一位置M(也即极耳40与弯折部分151的第一导电层1211的连接位置)与第二位置N(也即极耳40与平坦部分152的第二导电层1312的连接位置)的排布方向可以平行于X轴的正方向。在其他实施方式中，第一位置M与第二位置N的排布方向不做具体的限定。In this embodiment, the first position M (that is, the connection position between the tab 40 and the first conductive layer 1211 of the bent portion 151 ) and the second position N (that is, the second conductive layer between the tab 40 and the flat portion 152 ) The arrangement direction of the connection positions of the layers 1312 may be parallel to the positive direction of the X-axis. In other embodiments, the arrangement direction of the first position M and the second position N is not specifically limited.

可以理解的是，本实施方式通过极耳40固定且电连接弯折部分151的第一导电层1211，极耳40固定且电连接平坦部分152的第二导电层1312，从而使得极耳40可以同时固定且电连接集流体10的第一导电层12与第二导电层13。这样，当第一电极片100a应用于电池1000时，第一活性涂层20和第二活性涂层30均可以实现导通，从而避免第一活性涂层20和第二活性涂层30中的一个因不工作而导致电池1000的容量的损失。另外，相较于第二活性涂层通过穿刺过孔等方式与极耳电连接的方案，本申请的电池1000不容易出现高阻态问题，不会影响电池的容量发挥和安全性能。It can be understood that in this embodiment, the tab 40 is fixed and electrically connected to the first conductive layer 1211 of the bent portion 151, and the tab 40 is fixed and electrically connected to the second conductive layer 1312 of the flat portion 152, so that the tab 40 can At the same time, the first conductive layer 12 and the second conductive layer 13 of the current collector 10 are fixed and electrically connected. In this way, when the first electrode sheet 100a is applied to the battery 1000, both the first active coating 20 and the second active coating 30 can realize conduction, thereby avoiding the first active coating 20 and the second active coating 30 A loss of battery 1000 capacity due to inactivity. In addition, compared with the scheme in which the second active coating is electrically connected to the tabs by piercing through holes, the battery 1000 of the present application is not prone to high-resistance problems, and will not affect the capacity and safety performance of the battery.

另外，由于在Y轴方向，非涂层部15的弯折部分151的尺寸等于非涂层部15的平坦部分152的尺寸，本实施方式的非涂层部15不用再通过额外的裁剪工艺来减小弯折部分151在Y轴方向上的尺寸。这样，本实施方式的第一电极片100a在工艺成本上可以减小投入。In addition, since the size of the bent portion 151 of the non-coating portion 15 is equal to the size of the flat portion 152 of the non-coating portion 15 in the Y-axis direction, the non-coating portion 15 of this embodiment does not need to be cut out by an additional cutting process. The size of the bent portion 151 in the Y-axis direction is reduced. In this way, the first electrode sheet 100a of this embodiment can reduce the investment in process cost.

本实施方式的第一电极片100a的形成方式可以参阅第一种实施方式的第一电极片100a的形成方式。与第一种实施方式不同的是，本实施方式的第一电极片100a的形成步骤可以不用步骤2，也即可以不用对待加工件的非涂层部15进行裁切，以使在Y轴方向，非涂层部15的弯折部分151的尺寸小于非涂层部15的平坦部分152的尺寸。For the formation method of the first electrode sheet 100a in this embodiment, refer to the formation method of the first electrode sheet 100a in the first embodiment. Different from the first embodiment, the step 2 of forming the first electrode piece 100a of this embodiment may not be necessary, that is, it may not be necessary to cut the non-coated part 15 of the workpiece to be processed, so that in the Y-axis direction , the size of the bent portion 151 of the non-coating portion 15 is smaller than the size of the flat portion 152 of the non-coating portion 15 .

第四种实施方式中，与第三种实施方式中相同的技术内容不再赘述：请参阅图14，图14是图3所示的第一电极片100a的再一种实施方式的结构示意图。集流体10的非涂层部15连接于集流体10的涂层部14的中部。在本实施方式中，集流体10的非涂层部15的结构、集流体10的涂层部14的结构以及极耳40的结构均可以参阅第三种实施方式的集流体10的非涂层部15的结构、集流体10的涂层部14的结构以及极耳40的结构(请参阅图12和图13)。另外，极耳40与集流体10的非涂层部15的连接方式也可以参阅第三种实施方式的极耳40与集流体10的非涂层部15的连接方式(请参阅图12和图13)。具体的本实施方式不再赘述。In the fourth embodiment, the same technical content as in the third embodiment will not be repeated: please refer to FIG. 14 , which is a schematic structural diagram of another embodiment of the first electrode sheet 100 a shown in FIG. 3 . The non-coated portion 15 of the current collector 10 is connected to the middle of the coated portion 14 of the current collector 10 . In this embodiment, the structure of the non-coated part 15 of the current collector 10, the structure of the coated part 14 of the current collector 10, and the structure of the tab 40 can all refer to the non-coated part of the current collector 10 of the third embodiment. The structure of the portion 15, the structure of the coating portion 14 of the current collector 10, and the structure of the tab 40 (see FIGS. 12 and 13). In addition, the connection method between the tab 40 and the non-coated part 15 of the current collector 10 can also refer to the connection method between the tab 40 and the non-coated part 15 of the current collector 10 in the third embodiment (please refer to FIG. 12 and FIG. 13). The specific implementation manner will not be repeated here.

第五种实施方式中，与第一种实施方式相同的技术内容不再赘述：请参阅图15和图16，图15是图3所示的第一电极片100a的再一种实施方式的结构示意图。图16是图15所示的第一电极片100a在E-E线处的部分剖面示意图。在本实施方式中，集流体10的涂层部14的结构以及极耳40的结构均可以参阅第一种实施方式的集流体10的涂层部14的结构以及极耳40的结构(请参阅图4至图7)。具体的这里不再赘述。In the fifth embodiment, the same technical content as the first embodiment will not be repeated: please refer to Figure 15 and Figure 16, Figure 15 is the structure of another embodiment of the first electrode sheet 100a shown in Figure 3 schematic diagram. FIG. 16 is a schematic partial cross-sectional view of the first electrode sheet 100a shown in FIG. 15 at the line E-E. In this embodiment, the structure of the coating portion 14 of the current collector 10 and the structure of the tab 40 can refer to the structure of the coating portion 14 of the current collector 10 and the structure of the tab 40 in the first embodiment (see Figures 4 to 7). The details will not be repeated here.

在本实施方式中，弯折部分151的绝缘层1111包括依次连接的第一段11a(也即弯折部分151的第一端的一部分)、第二段11b、第三段11c以及第四段11d(也即弯折部分151的第二端的一部分)，也即第二段11b连接于第一段11a与第三段11c之间，第三段11c连接于第二段11b与第四段11d之间。此外，弯折部分151的绝缘层1111的第一段11a还连接于平坦部分152的第二端的绝缘层1112。弯折部分151的绝缘层1111的第二段11b和弯折部分151的绝缘层1111的第四段11d均与平坦部分152的绝缘层1112相对设置。图16通过虚线示意性地区分第一段11a、第二段11b、第三段11c、第四段11d以及平坦部分152的绝缘层1112。In this embodiment, the insulating layer 1111 of the bent portion 151 includes a first segment 11a (that is, a part of the first end of the bent portion 151), a second segment 11b, a third segment 11c and a fourth segment connected in sequence. 11d (that is, a part of the second end of the bent portion 151), that is, the second section 11b is connected between the first section 11a and the third section 11c, and the third section 11c is connected between the second section 11b and the fourth section 11d between. In addition, the first segment 11 a of the insulating layer 1111 of the bent portion 151 is also connected to the insulating layer 1112 of the second end of the flat portion 152 . Both the second segment 11b of the insulating layer 1111 of the bent portion 151 and the fourth segment 11d of the insulating layer 1111 of the bent portion 151 are opposite to the insulating layer 1112 of the flat portion 152 . FIG. 16 schematically distinguishes the first segment 11 a , the second segment 11 b , the third segment 11 c , the fourth segment 11 d and the insulating layer 1112 of the flat portion 152 by dotted lines.

另外，弯折部分151的第一导电层1211包括依次连接的第一段12a(也即弯折部分151的第一端的一部分)、第二段12b、第三段12c以及第四段12d(也即弯折部分151的第二端的一部分)，也即第二段12b连接于第一段12a与第三段12c之间，第三段12c连接于第二段12b与第四段12d之间。此外，弯折部分151的第一导电层1211的第一段12a还连接于平坦部分152的第二端的第一导电层1212。弯折部分151的第一导电层1211的第二段12b和弯折部分151的第一导电层1211的第四段12d均与平坦部分152的第一导电层1212相对设置。图16通过虚线示意性地区分第一段12a、第二段12b、第三段12c、第四段12d以及平坦部分152的第一导电层1212。In addition, the first conductive layer 1211 of the bent portion 151 includes a first segment 12a (that is, a part of the first end of the bent portion 151), a second segment 12b, a third segment 12c, and a fourth segment 12d ( That is, a part of the second end of the bent portion 151), that is, the second segment 12b is connected between the first segment 12a and the third segment 12c, and the third segment 12c is connected between the second segment 12b and the fourth segment 12d . In addition, the first segment 12 a of the first conductive layer 1211 of the bent portion 151 is also connected to the first conductive layer 1212 of the second end of the flat portion 152 . Both the second segment 12b of the first conductive layer 1211 of the bent portion 151 and the fourth segment 12d of the first conductive layer 1211 of the bent portion 151 are opposite to the first conductive layer 1212 of the flat portion 152 . 16 schematically distinguishes the first segment 12a, the second segment 12b, the third segment 12c, the fourth segment 12d and the first conductive layer 1212 of the flat portion 152 by dotted lines.

另外，弯折部分151的第二导电层1311包括依次连接的第一段13a(也即弯折部分151的第一端的一部分)、第二段13b、第三段13c以及第四段13d(也即弯折部分151的第二端的一部分)，也即第二段13b连接于第一段13a与第三段13c之间，第三段13c连接于第二段13b与第四段13d之间。此外，弯折部分151的第二导电层1311的第一段13a还连接于平坦部分152的第二端的第二导电层1312。弯折部分151的第二导电层1311的第二段13b和弯折部分151的第二导电层1311的第四段13d均与平坦部分152的第二导电层1312相对设置。图16通过虚线示意性地区分第一段13a、第二段13b、第三段13c、第四段13d以及平坦部分152的第二导电层1312。其中，平坦部分152的第二导电层1312与弯折部分151的第一导电层1211的第四段12d相对且相邻设置。In addition, the second conductive layer 1311 of the bent portion 151 includes the first segment 13a (that is, a part of the first end of the bent portion 151), the second segment 13b, the third segment 13c and the fourth segment 13d ( That is, a part of the second end of the bent portion 151), that is, the second segment 13b is connected between the first segment 13a and the third segment 13c, and the third segment 13c is connected between the second segment 13b and the fourth segment 13d . In addition, the first segment 13 a of the second conductive layer 1311 of the bent portion 151 is also connected to the second conductive layer 1312 of the second end of the flat portion 152 . Both the second segment 13b of the second conductive layer 1311 of the bent portion 151 and the fourth segment 13d of the second conductive layer 1311 of the bent portion 151 are opposite to the second conductive layer 1312 of the flat portion 152 . FIG. 16 schematically distinguishes the first segment 13 a , the second segment 13 b , the third segment 13 c , the fourth segment 13 d and the second conductive layer 1312 of the flat portion 152 by dotted lines. Wherein, the second conductive layer 1312 of the flat portion 152 is opposite to and adjacent to the fourth segment 12d of the first conductive layer 1211 of the bent portion 151 .

请再次参阅图15，在Y轴方向，非涂层部15的弯折部分151的尺寸L1等于非涂层部15的平坦部分152的尺寸L2。在其他实施方式中，在Y轴方向，非涂层部15的弯折部分151的尺寸L1小于非涂层部15的平坦部分152的尺寸L2。示例性地，在Y轴方向，非涂层部15的弯折部分151的尺寸等于非涂层部15的平坦部分152的尺寸的一半。Please refer to FIG. 15 again, in the Y-axis direction, the dimension L1 of the bent portion 151 of the non-coating portion 15 is equal to the dimension L2 of the flat portion 152 of the non-coating portion 15 . In other embodiments, in the Y-axis direction, the dimension L1 of the bent portion 151 of the non-coating portion 15 is smaller than the dimension L2 of the flat portion 152 of the non-coating portion 15 . Exemplarily, in the Y-axis direction, the size of the bent portion 151 of the non-coating portion 15 is equal to half the size of the flat portion 152 of the non-coating portion 15 .

请再次参阅图15和图16，极耳40的一部分设置于弯折部分151的第一导电层1211的第四段12d与平坦部分152的第二导电层1312之间。需要说明的是，由于在图15所示意的角度下，弯折部分151的第一导电层1211的第四段12d遮盖极耳40的一部分，图15通过虚线示意极耳40的一部分。Referring to FIG. 15 and FIG. 16 again, a part of the tab 40 is disposed between the fourth section 12d of the first conductive layer 1211 of the bent portion 151 and the second conductive layer 1312 of the flat portion 152 . It should be noted that, since the fourth section 12d of the first conductive layer 1211 of the bent portion 151 covers a part of the tab 40 at the angle shown in FIG. 15 , FIG. 15 shows a part of the tab 40 through a dotted line.

其中，极耳40固定于弯折部分151的第一导电层1211的第四段12d，且电连接于弯折部分151的第一导电层1211的第四段12d。此时，极耳40可以通过弯折部分151的第一导电层1211的第四段12d、第三段12c、第二段12b、第一段12a以及平坦部分152的第一导电层1212电连接至涂层部14的第一导电层122。示例性地，通过超声波焊接工艺或者其他焊接工艺，以将极耳40固定于非涂层部15的弯折部分151的第一导电层1211。Wherein, the tab 40 is fixed to the fourth segment 12d of the first conductive layer 1211 of the bent portion 151 and is electrically connected to the fourth segment 12d of the first conductive layer 1211 of the bent portion 151 . At this time, the tab 40 can be electrically connected to the fourth segment 12d, the third segment 12c, the second segment 12b, the first segment 12a of the first conductive layer 1211 of the bent part 151 and the first conductive layer 1212 of the flat part 152 to the first conductive layer 122 of the coating portion 14 . Exemplarily, the tab 40 is fixed to the first conductive layer 1211 of the bent portion 151 of the non-coating portion 15 by an ultrasonic welding process or other welding process.

另外，极耳40还固定于平坦部分152的第二导电层1312，且电连接于平坦部分152的第二导电层1312。此时，极耳40可以通过平坦部分152的第二导电层1312电连接至涂层部14的第二导电层132。示例性地，通过超声波焊接工艺或者其他焊接工艺，以将极耳40固定于非涂层部15的平坦部分152的第二导电层1312。In addition, the tab 40 is also fixed to the second conductive layer 1312 of the flat portion 152 and electrically connected to the second conductive layer 1312 of the flat portion 152 . At this time, the tab 40 may be electrically connected to the second conductive layer 132 of the coating part 14 through the second conductive layer 1312 of the flat part 152 . Exemplarily, the tab 40 is fixed to the second conductive layer 1312 of the flat portion 152 of the non-coating portion 15 by an ultrasonic welding process or other welding processes.

可以理解的是，本实施方式通过将集流体10的非涂层部15的部分设置成弯折部分151，且弯折部分151通过两次弯折，以使弯折部分151的第一导电层1211的第四段12d与平坦部分152的第二导电层1312相对且相邻设置。这样，通过极耳40固定且电连接弯折部分151的第一导电层1211的第四段12d，极耳40固定且电连接平坦部分152的第二导电层1312，从而使得极耳40可以同时固定且电连接集流体10的第一导电层12与第二导电层13。It can be understood that in this embodiment, the part of the non-coating part 15 of the current collector 10 is set as the bent part 151, and the bent part 151 is bent twice, so that the first conductive layer of the bent part 151 The fourth section 12d of 1211 is opposite to and adjacent to the second conductive layer 1312 of the flat portion 152 . In this way, the tab 40 fixes and electrically connects the fourth segment 12d of the first conductive layer 1211 of the bent portion 151, and the tab 40 fixes and electrically connects the second conductive layer 1312 of the flat portion 152, so that the tab 40 can simultaneously The first conductive layer 12 and the second conductive layer 13 of the current collector 10 are fixed and electrically connected.

在其他实施方式中，第五种实施方式的非涂层部15也可以位于涂层部14的中部，可以参阅第二种实施方式的第一电极片100a的设置方式。In other implementation manners, the non-coated portion 15 of the fifth implementation manner may also be located in the middle of the coating portion 14 , and reference may be made to the arrangement manner of the first electrode piece 100 a of the second implementation manner.

第六种实施方式中，与第一种实施方式相同的技术内容不再赘述：请参阅图17和图18，图17是图3所示的第一电极片100a的再一种实施方式的结构示意图。图18是图17所示的第一电极片100a在F-F线处的部分剖面示意图。集流体10包括第一涂层部14a、第二涂层部14b和非涂层部15。非涂层部15连接于第一涂层部14a和第二涂层部14b之间。可以理解的是，集流体10的第一涂层部14a包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。集流体10的第二涂层部14b包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。集流体10的非涂层部15包括绝缘层11的另一部分、第一导电层12的另一部分和第二导电层13的另一部分。In the sixth embodiment, the same technical content as the first embodiment will not be repeated: please refer to Figure 17 and Figure 18, Figure 17 is the structure of another embodiment of the first electrode sheet 100a shown in Figure 3 schematic diagram. FIG. 18 is a schematic partial cross-sectional view of the first electrode sheet 100a shown in FIG. 17 at the line F-F. The current collector 10 includes a first coating portion 14 a , a second coating portion 14 b and a non-coating portion 15 . The non-coated portion 15 is connected between the first coated portion 14a and the second coated portion 14b. It can be understood that the first coating part 14 a of the current collector 10 includes a part of the insulating layer 11 , a part of the first conductive layer 12 and a part of the second conductive layer 13 . The second coating portion 14 b of the current collector 10 includes a part of the insulating layer 11 , a part of the first conductive layer 12 and a part of the second conductive layer 13 . The non-coated portion 15 of the current collector 10 includes another portion of the insulating layer 11 , another portion of the first conductive layer 12 , and another portion of the second conductive layer 13 .

在本实施方式中，集流体10的非涂层部15为平坦状。相较于第一种实施方式，本实施方式的非涂层部15不包括弯折部分151。In this embodiment, the non-coated portion 15 of the current collector 10 is flat. Compared with the first embodiment, the non-coating portion 15 of this embodiment does not include the bent portion 151 .

在本实施方式中，第一涂层部14a的第一导电层122远离第一涂层部14a的绝缘层112的表面为第一涂层部14a的第一面141。第一涂层部14a的第二导电层132远离第一涂层部14a的绝缘层112的表面为第一涂层部14a的第二面142。第二涂层部14b的第一导电层123远离第二涂层部14b的绝缘层113的表面为第二涂层部14b的第三面143。第二涂层部14b的第二导电层133远离第二涂层部14b的绝缘层113的表面为第二涂层部14b的第四面144。In this embodiment, the surface of the first conductive layer 122 of the first coating portion 14 a away from the insulating layer 112 of the first coating portion 14 a is the first surface 141 of the first coating portion 14 a. The surface of the second conductive layer 132 of the first coating portion 14 a away from the insulating layer 112 of the first coating portion 14 a is the second surface 142 of the first coating portion 14 a. The surface of the first conductive layer 123 of the second coating portion 14b away from the insulating layer 113 of the second coating portion 14b is the third surface 143 of the second coating portion 14b. The surface of the second conductive layer 133 of the second coating portion 14b away from the insulating layer 113 of the second coating portion 14b is the fourth surface 144 of the second coating portion 14b.

其中，第一活性涂层20位于第一面141。第二活性涂层30位于第二面142。此时，在Z轴方向上，第一活性涂层20、第一涂层部14a的第一导电层122、第一涂层部14a的绝缘层112、第一涂层部14a的第二导电层132以及第二活性涂层30。Wherein, the first active coating layer 20 is located on the first surface 141 . The second active coating 30 is on the second face 142 . At this time, in the Z-axis direction, the first active coating 20, the first conductive layer 122 of the first coating part 14a, the insulating layer 112 of the first coating part 14a, the second conductive layer of the first coating part 14a layer 132 and the second active coating 30.

在本实施方式中，第一电极片100a还包括第三活性涂层50和第四活性涂层60。第三活性涂层50位于第三面143。第四活性涂层60位于第四面144。此时，在Z轴方向上，第三活性涂层50、第二涂层部14b的第一导电层123、第二涂层部14b的绝缘层113、第二涂层部14b的第二导电层133以及第四活性涂层60。In this embodiment, the first electrode sheet 100 a further includes a third active coating 50 and a fourth active coating 60 . The third active coating 50 is on the third face 143 . The fourth active coating 60 is on the fourth side 144 . At this time, in the Z-axis direction, the third active coating layer 50, the first conductive layer 123 of the second coating part 14b, the insulating layer 113 of the second coating part 14b, and the second conductive layer 123 of the second coating part 14b layer 133 and fourth active coating 60 .

请参阅图19，并结合图17所示，图19是图17所示的第一电极片100a的极耳40的一种实施方式的结构示意图。极耳40包括的第一固定部41、第二固定部42以及连接部43。第一固定部41的一端与第二固定部42的一端共同连接于连接部43的一端。第一固定部41的另一端与第二固定部42的另一端分开设置。示例性地，极耳40呈“Y”状。Please refer to FIG. 19 , and in combination with FIG. 17 , FIG. 19 is a structural schematic diagram of an embodiment of the tab 40 of the first electrode sheet 100 a shown in FIG. 17 . The tab 40 includes a first fixing portion 41 , a second fixing portion 42 and a connecting portion 43 . One end of the first fixing portion 41 and one end of the second fixing portion 42 are jointly connected to one end of the connecting portion 43 . The other end of the first fixing portion 41 is set apart from the other end of the second fixing portion 42 . Exemplarily, the tab 40 is in a "Y" shape.

请参阅图18与图17所示，极耳40的第一固定部41固定于非涂层部15的第一导电层121，且电连接于非涂层部15的第一导电层121。此时，极耳40可以通过非涂层部15的第一导电层121电连接于第一涂层部14a的第一导电层122以及第二涂层部14b的第一导电层123。另外，极耳40的第二固定部42固定于非涂层部15的第二导电层131，且电连接于非涂层部15的第二导电层131。此时，极耳40可以通过非涂层部15的第二导电层131电连接于第一涂层部14a的第二导电层132以及第二涂层部14b的第二导电层133。可以理解的是，在Z轴方向上，第一电极片100a在非涂层部15的位置具有五层结构。具体包括极耳40的第一固定部41、非涂层部15的第一导电层121、非涂层部15的绝缘层111、非涂层部15的第二导电层131以及极耳40的第二固定部42。Please refer to FIG. 18 and FIG. 17 , the first fixing portion 41 of the tab 40 is fixed to the first conductive layer 121 of the non-coating portion 15 and is electrically connected to the first conductive layer 121 of the non-coating portion 15 . At this time, the tab 40 can be electrically connected to the first conductive layer 122 of the first coating part 14 a and the first conductive layer 123 of the second coating part 14 b through the first conductive layer 121 of the non-coating part 15 . In addition, the second fixing portion 42 of the tab 40 is fixed to the second conductive layer 131 of the non-coating portion 15 and is electrically connected to the second conductive layer 131 of the non-coating portion 15 . At this time, the tab 40 can be electrically connected to the second conductive layer 132 of the first coating part 14 a and the second conductive layer 133 of the second coating part 14 b through the second conductive layer 131 of the non-coating part 15 . It can be understood that, in the Z-axis direction, the first electrode sheet 100 a has a five-layer structure at the position of the non-coating portion 15 . It specifically includes the first fixed part 41 of the tab 40, the first conductive layer 121 of the non-coated part 15, the insulating layer 111 of the non-coated part 15, the second conductive layer 131 of the non-coated part 15 and the structure of the tab 40. the second fixing part 42 .

在本实施方式中，通过将极耳40的第一固定部41和第二固定部42叉开设置，以使极耳40可以同时固定连接于集流体10的第一导电层12与第二导电层13，且电连接于集流体10的第一导电层12与第二导电层13。In this embodiment, by setting the first fixing part 41 and the second fixing part 42 of the tab 40 apart, the tab 40 can be fixedly connected to the first conductive layer 12 and the second conductive layer 12 of the current collector 10 at the same time. layer 13 and is electrically connected to the first conductive layer 12 and the second conductive layer 13 of the current collector 10 .

在其他实施方式中，集流体10也可以只包括第一涂层部14a或者第二涂层部14b中的一者。非涂层部15也可以连接于第一涂层部14a或者第二涂层部14b的任意位置，例如，非涂层部15也可以连接于第一涂层部14a的中部，且位于第一涂层部14a的中部的一侧。再例如，非涂层部15也可以连接于第一涂层部14a的中部，且第一涂层部14a围绕非涂层部15设置。In other embodiments, the current collector 10 may only include one of the first coating part 14a or the second coating part 14b. The non-coating portion 15 can also be connected to any position of the first coating portion 14a or the second coating portion 14b, for example, the non-coating portion 15 can also be connected to the middle part of the first coating portion 14a, and be positioned at the first One side of the middle part of the coating part 14a. For another example, the non-coating portion 15 may also be connected to the middle of the first coating portion 14 a, and the first coating portion 14 a is disposed around the non-coating portion 15 .

在本实施方式中，将结合图17至图19具体介绍第一电极片100a的一种实施方式的形成过程。In this embodiment, the forming process of an embodiment of the first electrode sheet 100 a will be described in detail with reference to FIGS. 17 to 19 .

步骤1，在绝缘层11的第一表面113形成第一导电层12，以及在绝缘层11的第二表面114形成第二导电层13，以形成集流体10。其中，集流体10包括第一涂层部14a、第二涂层部14b和非涂层部15。非涂层部15连接于第一涂层部14a和第二涂层部14b之间。可以理解的是，集流体10的第一涂层部14a包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。集流体10的第二涂层部14b包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。集流体10的非涂层部15包括绝缘层11的另一部分、第一导电层12的另一部分和第二导电层13的另一部分。In step 1, the first conductive layer 12 is formed on the first surface 113 of the insulating layer 11 , and the second conductive layer 13 is formed on the second surface 114 of the insulating layer 11 to form the current collector 10 . Wherein, the current collector 10 includes a first coating portion 14 a , a second coating portion 14 b and a non-coating portion 15 . The non-coated portion 15 is connected between the first coated portion 14a and the second coated portion 14b. It can be understood that the first coating part 14 a of the current collector 10 includes a part of the insulating layer 11 , a part of the first conductive layer 12 and a part of the second conductive layer 13 . The second coating portion 14 b of the current collector 10 includes a part of the insulating layer 11 , a part of the first conductive layer 12 and a part of the second conductive layer 13 . The non-coated portion 15 of the current collector 10 includes another portion of the insulating layer 11 , another portion of the first conductive layer 12 , and another portion of the second conductive layer 13 .

步骤2，在第一涂层部14a的第一面141形成第一活性涂层20，以及在第一涂层部14a的第二面142形成第二活性涂层30，在第二涂层部14b的第三面143形成第三活性涂层50，在第二涂层部14b的第四面144形成第四活性涂层60。其中，第一涂层部14a的第一导电层122远离第一涂层部14a的绝缘层112的表面为第一涂层部14a的第一面141。第一涂层部14a的第二导电层132远离第一涂层部14a的绝缘层112的表面为第一涂层部14a的第二面142。第二涂层部14b的第一导电层123远离第二涂层部14b的绝缘层113的表面为第二涂层部14b的第三面143。第二涂层部14b的第二导电层133远离第二涂层部14b的绝缘层113的表面为第二涂层部14b的第四面144。Step 2, form the first active coating 20 on the first surface 141 of the first coating portion 14a, and form the second active coating 30 on the second surface 142 of the first coating portion 14a, The third active coating layer 50 is formed on the third surface 143 of the second coating portion 14b, and the fourth active coating layer 60 is formed on the fourth surface 144 of the second coating portion 14b. Wherein, the surface of the first conductive layer 122 of the first coating portion 14 a away from the insulating layer 112 of the first coating portion 14 a is the first surface 141 of the first coating portion 14 a. The surface of the second conductive layer 132 of the first coating portion 14 a away from the insulating layer 112 of the first coating portion 14 a is the second surface 142 of the first coating portion 14 a. The surface of the first conductive layer 123 of the second coating portion 14b away from the insulating layer 113 of the second coating portion 14b is the third surface 143 of the second coating portion 14b. The surface of the second conductive layer 133 of the second coating portion 14b away from the insulating layer 113 of the second coating portion 14b is the fourth surface 144 of the second coating portion 14b.

步骤3，制备极耳40，其中，极耳40包括的第一固定部41、第二固定部42以及连接部43。第一固定部41的一端与第二固定部42的一端共同连接于连接部43的一端。第一固定部41的另一端与第二固定部42的另一端分开设置。示例性地，极耳40呈“Y”状。Step 3, preparing the tab 40 , wherein the tab 40 includes a first fixing part 41 , a second fixing part 42 and a connecting part 43 . One end of the first fixing portion 41 and one end of the second fixing portion 42 are jointly connected to one end of the connecting portion 43 . The other end of the first fixing portion 41 is set apart from the other end of the second fixing portion 42 . Exemplarily, the tab 40 is in a "Y" shape.

步骤4，将极耳40的第一固定部41固定于非涂层部15的第一导电层121，且电连接于非涂层部15的第一导电层121，以及将极耳40的第二固定部42固定于非涂层部15的第二导电层131，且电连接于非涂层部15的第二导电层131。 Step 4, fixing the first fixing part 41 of the tab 40 to the first conductive layer 121 of the non-coating part 15, and electrically connecting to the first conductive layer 121 of the non-coating part 15, and fixing the first fixing part 41 of the tab 40 to the first conductive layer 121 of the non-coating part 15. The two fixing parts 42 are fixed to the second conductive layer 131 of the non-coating part 15 and electrically connected to the second conductive layer 131 of the non-coating part 15 .

上文结合相关附图具体介绍了第一电极片100a的几种实施方式。在本实施方式中，第一电极片100a与第一隔离膜100b、第二电极片100c和第二隔离膜100d通过卷绕工艺形成裸电芯100。下文将结合相关附图具体介绍第一电极片100a也可以与第二电极片100c、第一隔离膜100b和第二隔离膜100d形成另一种裸电芯100结构。Several implementations of the first electrode sheet 100a have been specifically introduced above in conjunction with the relevant drawings. In this embodiment, the first electrode piece 100a, the first separator 100b, the second electrode piece 100c and the second separator 100d form the bare cell 100 through a winding process. Hereinafter, it will be specifically introduced in conjunction with related drawings that the first electrode sheet 100a can also form another bare cell 100 structure with the second electrode sheet 100c, the first isolation film 100b and the second isolation film 100d.

请参阅图20a，图20a是本申请实施例提供的裸电芯100的另一种实施方式的结构示意图。裸电芯100包括多个电池单元110。多个电池单元110沿Z轴的正方向排布。多个电池单元110可以沿Z轴的正方向层叠排布，也可以间隔排布。需要说明的是，电池单元110的数量不仅限于图20a所示意的两个。在其他实施方式中，电池单元110的数量也可以大于两个。Please refer to FIG. 20a . FIG. 20a is a schematic structural diagram of another implementation manner of the bare cell 100 provided by the embodiment of the present application. The bare cell 100 includes a plurality of battery cells 110 . A plurality of battery cells 110 are arranged along the positive direction of the Z axis. A plurality of battery cells 110 may be arranged in layers along the positive direction of the Z axis, or may be arranged at intervals. It should be noted that the number of battery cells 110 is not limited to two as shown in FIG. 20a. In other embodiments, the number of battery cells 110 may also be greater than two.

其中，每个电池单元110均包括第一电极片100a、第一隔离膜100b、第二电极片100c 和第二隔离膜100d。其中，第一电极片100a、第一隔离膜100b、第二电极片100c以及第二隔离膜100d依次沿Y轴的正方向排布。第一电极片100a、第一隔离膜100b、第二电极片100c以及第二隔离膜100d可以依次层叠设置，也可以间隔设置。可以理解的是，本实施方式的第一电极片100a以图7所示意的第一电极片100a为例进行描述。另外，第二电极片100c的结构可以采用与第一电极片100a相同的结构。第二电极片100c的结构也可以采用现有的电极片结构。具体的本申请实施方式不做限定。Wherein, each battery cell 110 includes a first electrode sheet 100a, a first separator 100b, a second electrode sheet 100c and a second separator 100d. Wherein, the first electrode sheet 100a, the first isolation film 100b, the second electrode sheet 100c and the second isolation film 100d are sequentially arranged along the positive direction of the Y axis. The first electrode sheet 100a, the first isolation film 100b, the second electrode sheet 100c, and the second isolation film 100d may be stacked sequentially, or may be arranged at intervals. It can be understood that, the first electrode sheet 100a in this embodiment is described by taking the first electrode sheet 100a shown in FIG. 7 as an example. In addition, the structure of the second electrode sheet 100c may be the same as that of the first electrode sheet 100a. The structure of the second electrode sheet 100c may also adopt an existing electrode sheet structure. The specific implementation manner of this application is not limited.

请再次参阅图20a，每个第一电极片100a的极耳40相对设置。相邻两个第一电极片100a的极耳40的弯折部分151背向设置。多个电池单元110的第一电极片100a的极耳40的端部为一体成型结构。在本实施方式中，第一个第一电极片100a的极耳40a和第二个第一电极片100a的极耳40b均相对设置。另外，第一个第一电极片100a的极耳40a的一端和第二个第一电极片100a的极耳40b的一端形成一体结构。示例性地，第一个第一电极片100a的极耳40a的一端和第二个第一电极片100a的极耳40b的一端可以通过热压焊、冷压焊或者扩散焊等工艺彼此固定连接。在其他实施方式中，第一个第一电极片100a的极耳40a的一端和第二个第一电极片100a的极耳40b的一端也可以部分固定连接，也即不用形成一体结构。示例性地，第一个第一电极片100a的极耳40a的一端和第二个第一电极片100a的极耳40b的一端通过超声波焊接等工艺彼此固定连接。Please refer to FIG. 20a again, the tabs 40 of each first electrode sheet 100a are arranged oppositely. The bent portions 151 of the tabs 40 of two adjacent first electrode sheets 100a are arranged facing away from each other. The ends of the tabs 40 of the first electrode sheet 100 a of the plurality of battery cells 110 are integrally formed. In this embodiment, the tab 40a of the first first electrode sheet 100a and the tab 40b of the second first electrode sheet 100a are oppositely disposed. In addition, one end of the tab 40a of the first first electrode sheet 100a and one end of the tab 40b of the second first electrode sheet 100a form an integral structure. Exemplarily, one end of the tab 40a of the first first electrode sheet 100a and one end of the tab 40b of the second first electrode sheet 100a can be fixedly connected to each other by processes such as thermocompression welding, cold compression welding, or diffusion welding. . In other embodiments, one end of the tab 40a of the first first electrode sheet 100a and one end of the tab 40b of the second first electrode sheet 100a may also be partially fixedly connected, that is, without forming an integrated structure. Exemplarily, one end of the tab 40a of the first first electrode sheet 100a and one end of the tab 40b of the second first electrode sheet 100a are fixedly connected to each other by ultrasonic welding or other processes.

可以理解的是，在本实施方式中，通过将每个第一电极片100a的极耳40的端部形成一体结构，从而在裸电芯100应用于电池1000结构时，每个第一电极片100a的极耳40的端部可以作为共同端直接自电池外壳200的内腔，穿过电池外壳200，并伸出至电池外壳200的外部。这样，一方面电池外壳200只需开设一个通孔，就可以使得每个第一电极片100a的极耳40的端部穿过电池外壳200，电池外壳200的结构强度较佳，另一方面，相较于每个第一电极片100a的极耳40的端部通过超声波焊接的方案，每个第一电极片100a的极耳40的端部之间是点连接。这样，每个第一电极片100a的极耳40的端部之间具有较大的缝隙，电池1000内部的电解液300容易经该缝隙流出。而本实施方式的每个第一电极片100a的极耳40的端部形成一体结构，每个第一电极片100a的极耳40的端部之间是面连接，每个第一电极片100a的极耳40的端部之间无缝隙，电池1000内部的电解液300不容易发生泄漏。再一方面，相较于每个第一电极片100a的极耳40的端部通过超声波焊接，并通过转接焊金属极耳的方案。这样，转接焊金属极耳不但会导致电芯结构复杂化，而且转接焊需要占用极片的空间，影响能量密度的方案。而本实施方式的每个第一电极片100a的极耳40的端部形成一体结构不会导致电芯结构复杂化，也不会占用电池1000的空间。It can be understood that, in this embodiment, by forming the end of the tab 40 of each first electrode sheet 100a into an integrated structure, when the bare cell 100 is applied to the battery 1000 structure, each first electrode sheet The end of the tab 40 of 100 a can be used as a common end directly from the inner cavity of the battery case 200 , through the battery case 200 , and protrude to the outside of the battery case 200 . In this way, on the one hand, the battery case 200 only needs to open a through hole, so that the end of the tab 40 of each first electrode sheet 100a can pass through the battery case 200, and the structural strength of the battery case 200 is better; on the other hand, Compared with the scheme in which the ends of the tabs 40 of each first electrode sheet 100a are ultrasonically welded, the ends of the tabs 40 of each first electrode sheet 100a are connected by points. In this way, there is a large gap between the ends of the tabs 40 of each first electrode sheet 100a, and the electrolyte 300 inside the battery 1000 can easily flow out through the gap. In this embodiment, the ends of the tabs 40 of each first electrode sheet 100a form an integrated structure, and the ends of the tabs 40 of each first electrode sheet 100a are surface-connected, and each first electrode sheet 100a There is no gap between the ends of the tabs 40 , and the electrolyte 300 inside the battery 1000 is not prone to leakage. On the other hand, compared with the scheme that the end of the tab 40 of each first electrode sheet 100a is welded by ultrasonic waves, and the metal tab is transferred through welding. In this way, the transfer welding of metal tabs will not only complicate the structure of the battery core, but also require the space of the pole piece to be occupied by transfer welding, which will affect the energy density solution. However, in this embodiment, forming an integrated structure at the ends of the tabs 40 of each first electrode piece 100 a will not complicate the structure of the battery cell, and will not occupy the space of the battery 1000 .

需要说明的是，每个第二电极片100c的极耳40也可以相对设置。可以理解的是，第二电极片100c的极耳40也可以与第一电极片100a的极耳40没有相对设置。当第二电极片100c的极耳40与第一电极片100a的极耳40没有相对设置时，第二电极片100c的极耳40与第一电极片100a的极耳40在Y轴方向上错开设置。每个第二电极片100c的极耳40的连接方式可以参阅每个第一电极片100a的极耳40的连接方式，也可以采用现有的方案实现连接。具体的本申请不做限定。It should be noted that the tabs 40 of each second electrode piece 100c may also be arranged oppositely. It can be understood that the tab 40 of the second electrode sheet 100c may not be opposite to the tab 40 of the first electrode sheet 100a. When the tab 40 of the second electrode sheet 100c is not opposite to the tab 40 of the first electrode sheet 100a, the tab 40 of the second electrode sheet 100c is offset from the tab 40 of the first electrode sheet 100a in the Y-axis direction set up. For the connection method of the tab 40 of each second electrode sheet 100c, reference may be made to the connection method of the tab 40 of each first electrode sheet 100a, or an existing solution may be used to realize the connection. The specific application is not limited.

在其他实施方式中，请参阅图20b,图20b是本申请实施例提供的裸电芯100的再一种实施方式的结构示意图。相邻两个第一电极片100a的极耳40的弯折部分151也可以相向设置。相邻两个电池单元110的第一电极片100a的极耳40为一体成型结构。In other implementation manners, please refer to FIG. 20b, which is a schematic structural diagram of another implementation manner of the bare cell 100 provided by the embodiment of the present application. The bent portions 151 of the tabs 40 of two adjacent first electrode sheets 100a may also be arranged facing each other. The tabs 40 of the first electrode sheets 100 a of two adjacent battery cells 110 are integrally formed.

上文结合相关附图具体介绍了几种裸电芯100结构，以及几种第一电极片100a的结构。下文将结合相关附图再具体介绍几种裸电芯100的结构，以及几种第一电极片100a的结构。Several structures of the bare cell 100 and several structures of the first electrode sheet 100a are specifically introduced above in conjunction with the relevant drawings. The structure of several bare cells 100 and the structure of several first electrode sheets 100a will be described in detail below in conjunction with related drawings.

第七种实施方式中，与第一种实施方式相同的技术内容不再赘述：请参阅图21和图22，图21是图3所示的第一电极片100a的再一种实施方式的结构示意图。图22是图21所示的第一电极片100a在G-G线处的部分剖面示意图。集流体10包括第一非涂层部15a、第二非涂层部15b和涂层部14。涂层部14连接于第一非涂层部15a和第二非涂层部15b之间。可以理解的是，当从Z轴方向看图21的集流体10时，也可以看到集流体10包括第一非涂层部15a、第二非涂层部15b和涂层部14。另外，第一非涂层部15a包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。第二非涂层部15b包括绝缘层11的一部分、第一导电层12的一部分和第二导电层13的一部分。涂层部14包括绝缘层11的另一部分、第一导电层12的另一部分和第二导电层13的另一部分。在本实施方式中，集流体10的第一非涂层部15a和第二非涂层部15b均为平坦状。相较于第一种实施方式，本实施方式的第一非涂层部15a和第二非涂层部15b均不包括弯折部分151。需要说明的是，附图21和图22均用虚线示意性地区分第一非涂层部15a、第二非涂层部15b和涂层部14。In the seventh embodiment, the same technical content as the first embodiment will not be repeated: please refer to Figure 21 and Figure 22, Figure 21 is the structure of another embodiment of the first electrode sheet 100a shown in Figure 3 schematic diagram. FIG. 22 is a schematic partial cross-sectional view of the first electrode sheet 100a shown in FIG. 21 at the line G-G. The current collector 10 includes a first non-coating portion 15 a , a second non-coating portion 15 b and a coating portion 14 . The coated portion 14 is connected between the first non-coated portion 15a and the second non-coated portion 15b. It can be understood that when the current collector 10 in FIG. 21 is viewed from the Z-axis direction, it can also be seen that the current collector 10 includes a first non-coated portion 15 a , a second non-coated portion 15 b and a coated portion 14 . In addition, the first non-coating portion 15 a includes a part of the insulating layer 11 , a part of the first conductive layer 12 , and a part of the second conductive layer 13 . The second non-coating portion 15 b includes a part of the insulating layer 11 , a part of the first conductive layer 12 , and a part of the second conductive layer 13 . The coating part 14 includes another part of the insulating layer 11 , another part of the first conductive layer 12 , and another part of the second conductive layer 13 . In this embodiment, both the first uncoated portion 15 a and the second uncoated portion 15 b of the current collector 10 are flat. Compared with the first embodiment, neither the first non-coating portion 15 a nor the second non-coating portion 15 b of this embodiment includes a bent portion 151 . It should be noted that both Fig. 21 and Fig. 22 schematically distinguish the first non-coating part 15a, the second non-coating part 15b and the coating part 14 with dotted lines.

在本实施方式中，极耳40的数量为两个，也即极耳40包括第一极耳401和第二极耳402。其中，第一极耳401和第二极耳402的结构均可以分别参阅第一种实施方式的极耳40的结构(请参阅图4)。具体地本实施方式不再赘述。In this embodiment, the number of tabs 40 is two, that is, the tabs 40 include a first tab 401 and a second tab 402 . Wherein, the structures of the first tab 401 and the second tab 402 can respectively refer to the structure of the tab 40 in the first embodiment (refer to FIG. 4 ). Specifically, this embodiment will not be described again.

其中，第一极耳401固定连接于第一非涂层部15a的第一导电层121，且电连接于第一非涂层部15a的第一导电层121。此时，第一极耳401可以通过第一非涂层部15a的第一导电层121电连接于涂层部14的第一导电层122。第二极耳402固定第二非涂层部15b的第二导电层133，且电连接于第二非涂层部15b的第二导电层133。此时，第二极耳402可以通过第二非涂层部15b的第二导电层133电连接于涂层部14的第二导电层132。可以理解的是，在X-Y平面内，第一极耳401与第二极耳402错开设置，也即在Z轴方向上，第一极耳401与第二极耳402没有相对设置。需要说明的是，图21的第一极耳401的一部分位于集流体10的底部，也即集流体10遮住了第一极耳401的一部分，因此图21通过虚线示意第一极耳401的一部分。Wherein, the first tab 401 is fixedly connected to the first conductive layer 121 of the first non-coating portion 15a, and is electrically connected to the first conductive layer 121 of the first non-coating portion 15a. At this time, the first tab 401 may be electrically connected to the first conductive layer 122 of the coated part 14 through the first conductive layer 121 of the first non-coated part 15a. The second tab 402 fixes the second conductive layer 133 of the second non-coating portion 15b and is electrically connected to the second conductive layer 133 of the second non-coating portion 15b. At this time, the second tab 402 may be electrically connected to the second conductive layer 132 of the coating part 14 through the second conductive layer 133 of the second non-coating part 15b. It can be understood that, in the X-Y plane, the first tab 401 and the second tab 402 are arranged staggered, that is, in the Z-axis direction, the first tab 401 and the second tab 402 are not oppositely arranged. It should be noted that a part of the first tab 401 in FIG. 21 is located at the bottom of the current collector 10, that is, the current collector 10 covers a part of the first tab 401. Therefore, FIG. 21 shows the position of the first tab 401 by a dashed line. part.

在本实施方式中，第一极耳401伸出集流体10的部分与第二极耳402伸出集流体10的部分位于集流体10的同一侧。可以理解的是，本实施方式通过设置两个极耳40(也即包括第一极耳401和第二极耳402)，从而利用两个极耳40分别固定集流体10的第一导电层12与第二导电层13以及分别电连接于集流体10的第一导电层12与第二导电层13。In this embodiment, the part of the first tab 401 protruding from the current collector 10 and the part of the second tab 402 protruding from the current collector 10 are located on the same side of the current collector 10 . It can be understood that, in this embodiment, two tabs 40 (that is, including the first tab 401 and the second tab 402 ) are provided, so that the first conductive layer 12 of the current collector 10 is respectively fixed by the two tabs 40 It is electrically connected to the second conductive layer 13 and to the first conductive layer 12 and the second conductive layer 13 of the current collector 10 respectively.

请参阅图23，图23是图21所示的第一电极片100a应用于电池1000的一种实施方式的剖面示意图。本实施方式的第一电极片100a与第一隔离膜100b、第二电极片100c和第二隔离膜100d通过卷绕工艺形成裸电芯100(该部分内容可以结合图3所示的卷绕状的裸电芯100)。可以理解的是，由于第一极耳401伸出集流体10的部分与第二极耳402伸出集流体10的部分位于集流体10的同一侧，使得当第一电极片100a卷绕之后，第一极耳401伸出集流体10的部分与第二极耳402伸出集流体10的部分也位于集流体10的同一侧，第一极耳401伸出集流体10的部分与第二极耳402伸出集流体10的部分在Z轴方向上错开设置。示例性地，第一极耳401伸出集流体10的部分与第二极耳402伸出集流体10的部分均位于集流体10的顶侧。Please refer to FIG. 23 . FIG. 23 is a schematic cross-sectional view of an embodiment in which the first electrode sheet 100 a shown in FIG. 21 is applied to a battery 1000 . In this embodiment, the first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c, and the second separator 100d form a bare cell 100 through a winding process (this part of the content can be combined with the winding shape shown in FIG. bare cell 100). It can be understood that since the part of the first tab 401 protruding from the current collector 10 and the part of the second tab 402 protruding from the current collector 10 are located on the same side of the current collector 10, after the first electrode sheet 100a is wound, The part of the first tab 401 protruding from the current collector 10 and the part of the second tab 402 protruding from the current collector 10 are also located on the same side of the current collector 10, and the part of the first tab 401 protruding from the current collector 10 is connected to the second pole. The parts of the ears 402 protruding from the current collector 10 are staggered in the Z-axis direction. Exemplarily, the part of the first tab 401 protruding from the current collector 10 and the part of the second tab 402 protruding from the current collector 10 are located on the top side of the current collector 10 .

在本实施方式中，第二电极片100c的结构与第一电极片100a的结构相同。此时，当第二电极片100c同第一电极片100a、第一隔离膜100b和第二隔离膜100d通过卷绕工艺形成裸电芯100时，第二电极片100c的第一极耳403伸出集流体10的部分与第二电极片100c的第二极耳404伸出集流体10的部分也位于集流体10的同一侧，且在Z轴方向上错开设置。In this embodiment, the structure of the second electrode sheet 100c is the same as that of the first electrode sheet 100a. At this time, when the second electrode sheet 100c, the first electrode sheet 100a, the first isolation film 100b and the second isolation film 100d form the bare cell 100 through the winding process, the first tab 403 of the second electrode sheet 100c stretches out. The part of the current collector 10 and the part of the second tab 404 of the second electrode sheet 100 c protruding from the current collector 10 are also located on the same side of the current collector 10 , and are staggered in the Z-axis direction.

在一种实施方式中，顶壁210设有间隔设置的第一通孔210a、第二通孔210b、第三通孔210c和第四通孔210d。第一通孔210a、第二通孔210b、第三通孔210c和第四通孔210d均可以将电池外壳200的内腔连通至电池外壳200的外部。在其他实施方式中，第一通孔210a、第二通孔210b、第三通孔210c和第四通孔210d也可以位于电池外壳200的其他位置。In one embodiment, the top wall 210 is provided with a first through hole 210a, a second through hole 210b, a third through hole 210c and a fourth through hole 210d arranged at intervals. The first through hole 210 a , the second through hole 210 b , the third through hole 210 c and the fourth through hole 210 d can communicate the inner cavity of the battery case 200 to the outside of the battery case 200 . In other implementation manners, the first through hole 210 a , the second through hole 210 b , the third through hole 210 c and the fourth through hole 210 d may also be located in other positions of the battery casing 200 .

另外，第一电极片100a的第一极耳401自电池外壳200的内腔，穿过电池外壳200的顶壁210的第一通孔210a，并伸出至电池外壳200的外部。第一电极片100a的第二极耳402自电池外壳200的内腔，穿过电池外壳200的顶壁210的第二通孔210b，并伸出至电池外壳200的外部。第二电极片100c的第一极耳403自电池外壳200的内腔，穿过电池外壳200的顶壁210的第三通孔210c，并伸出至电池外壳200的外部。第二电极片100c的第二极耳404自电池外壳200的内腔，穿过电池外壳200的顶壁210的第四通孔210d，并伸出至电池外壳200的外部。In addition, the first tab 401 of the first electrode piece 100 a passes through the first through hole 210 a of the top wall 210 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 . The second tab 402 of the first electrode piece 100 a passes through the second through hole 210 b of the top wall 210 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 . The first tab 403 of the second electrode sheet 100 c passes through the third through hole 210 c of the top wall 210 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 . The second tab 404 of the second electrode sheet 100c passes through the fourth through hole 210d of the top wall 210 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 .

另外，通过在第一电极片100a的第一极耳401与第一通孔210a的孔壁之间设置密封件、第一电极片100a的第二极耳402与第二通孔210b的孔壁之间设置密封件、第二电极片100c的第一极耳403与第三通孔210c的孔壁之间设置密封件以及第二电极片100c的第二极耳404与第四通孔210d的孔壁之间设置密封件，从而使得电池外壳200的内腔成为密闭的空间。示例性地，密封件可以为聚合物、玻璃、陶瓷、金属等。In addition, by providing a sealing member between the first tab 401 of the first electrode sheet 100a and the hole wall of the first through hole 210a, the second tab 402 of the first electrode sheet 100a and the hole wall of the second through hole 210b A seal is provided between the first tab 403 of the second electrode sheet 100c and the hole wall of the third through hole 210c, and a seal is provided between the second tab 404 of the second electrode sheet 100c and the wall of the fourth through hole 210d. A sealing member is provided between the hole walls, so that the inner cavity of the battery casing 200 becomes a closed space. Exemplarily, the seal may be polymer, glass, ceramic, metal, or the like.

可以理解的是，当电池1000还包括保护电路板(图未示)。保护电路板固定于电池外壳200。第一电极片100a的第一极耳401与第二极耳402可以共同电连接于保护电路板的正极端。示例性地，第一电极片100a的第一极耳401与第二极耳402可以通过并联后，再电连接于保护电路板的正极端。第二电极片100c的第一极耳403和第二极耳404可以共同电连接于保护电路板的负极端。示例性地，第二电极片100c的第一极耳403和第二极耳404可以通过并联后，再电连接于保护电路板的负极端。It can be understood that when the battery 1000 also includes a protection circuit board (not shown). The protection circuit board is fixed on the battery casing 200 . The first tab 401 and the second tab 402 of the first electrode sheet 100a may be electrically connected to the positive terminal of the protection circuit board. Exemplarily, the first tab 401 and the second tab 402 of the first electrode sheet 100a may be electrically connected to the positive end of the protection circuit board after being connected in parallel. The first tab 403 and the second tab 404 of the second electrode sheet 100c may be electrically connected to the negative terminal of the protection circuit board. Exemplarily, the first tab 403 and the second tab 404 of the second electrode sheet 100c may be electrically connected to the negative end of the protection circuit board after being connected in parallel.

第八种实施方式中，与第七种实施方式相同的技术内容不再赘述：请参阅图24和图25，图24是图3所示的第一电极片100a的再一种实施方式的结构示意图。图25是图24所示的第一电极片100a应用于电池1000的一种实施方式的结构示意图。本实施方式的第一电极片100a与第一隔离膜100b、第二电极片100c和第二隔离膜100d通过卷绕工艺形成裸电芯100(该部分内容可以结合图3所示的卷绕状的裸电芯100)。可以理解的是，由于第一极耳401伸出集流体10的部分与第二极耳402伸出集流体10的部分位于集流体10的不同侧，使得当第一电极片100a卷绕之后，第一极耳401伸出集流体10的部分与第二极耳402伸出集流体10的部分也位于集流体10的不同侧。此外，第一极耳401伸出集流体10的部分与第二极耳402伸出集流体10的部分在Z轴方向上错开设置。示例性地，第一极耳401伸出集流体10的部分位于集流体10的顶侧。第二极耳402伸出集流体10的部分位于集流体10的底侧。In the eighth embodiment, the same technical content as the seventh embodiment will not be repeated: please refer to Figure 24 and Figure 25, Figure 24 is the structure of another embodiment of the first electrode sheet 100a shown in Figure 3 schematic diagram. FIG. 25 is a schematic structural view of an embodiment in which the first electrode sheet 100 a shown in FIG. 24 is applied to a battery 1000 . In this embodiment, the first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c, and the second separator 100d form a bare cell 100 through a winding process (this part of the content can be combined with the winding shape shown in FIG. bare cell 100). It can be understood that since the part of the first tab 401 protruding from the current collector 10 and the part of the second tab 402 protruding from the current collector 10 are located on different sides of the current collector 10, after the first electrode sheet 100a is wound, The portion of the first tab 401 protruding from the current collector 10 and the portion of the second tab 402 protruding from the current collector 10 are also located on different sides of the current collector 10 . In addition, the portion of the first tab 401 protruding from the current collector 10 and the portion of the second tab 402 protruding from the current collector 10 are staggered in the Z-axis direction. Exemplarily, the part of the first tab 401 protruding from the current collector 10 is located on the top side of the current collector 10 . The part of the second tab 402 protruding from the current collector 10 is located on the bottom side of the current collector 10 .

在本实施方式中，第二电极片100c的结构与第一电极片100a的结构相同。此时，当第二电极片100c同第一电极片100a、第一隔离膜100b和第二隔离膜100d通过卷绕工艺形成裸电芯100时，第二电极片100c的第一极耳403伸出集流体10的部分与第二电极片100c的第二极耳404伸出集流体10的部分也位于集流体10的不同侧，且在Z轴方向上错开设置。In this embodiment, the structure of the second electrode sheet 100c is the same as that of the first electrode sheet 100a. At this time, when the second electrode sheet 100c, the first electrode sheet 100a, the first isolation film 100b and the second isolation film 100d form the bare cell 100 through the winding process, the first tab 403 of the second electrode sheet 100c stretches out. The portion protruding from the current collector 10 and the portion protruding from the second tab 404 of the second electrode sheet 100c are also located on different sides of the current collector 10 , and are staggered in the Z-axis direction.

在一种实施方式中，顶壁210设有间隔设置的第一通孔210a和第三通孔210c。底壁230设有间隔设置的第二通孔210b和第四通孔210d。第一通孔210a、第二通孔210b、第三通孔210c和第四通孔210d均可以将电池外壳200的内腔连通至电池外壳200的外部。在其他实施方式中，第一通孔210a、第二通孔210b、第三通孔210c和第四通孔210d也可以位于电池外壳200的其他位置。In one embodiment, the top wall 210 is provided with a first through hole 210 a and a third through hole 210 c arranged at intervals. The bottom wall 230 defines a second through hole 210b and a fourth through hole 210d spaced apart from each other. The first through hole 210 a , the second through hole 210 b , the third through hole 210 c and the fourth through hole 210 d can communicate the inner cavity of the battery case 200 to the outside of the battery case 200 . In other implementation manners, the first through hole 210 a , the second through hole 210 b , the third through hole 210 c and the fourth through hole 210 d may also be located in other positions of the battery casing 200 .

另外，第一电极片100a的第一极耳401自电池外壳200的内腔，穿过电池外壳200的顶壁210的第一通孔210a，并伸出至电池外壳200的外部。第一电极片100a的第二极耳402自电池外壳200的内腔，穿过电池外壳200的底壁230的第二通孔210b，并伸出至电池外壳200的外部。第二电极片100c的第一极耳403自电池外壳200的内腔，穿过电池外壳200的顶壁210的第三通孔210c，并伸出至电池外壳200的外部。第二电极片100c的第二极耳404自电池外壳200的内腔，穿过电池外壳200的底壁230的第四通孔210d，并伸出至电池外壳200的外部。In addition, the first tab 401 of the first electrode piece 100 a passes through the first through hole 210 a of the top wall 210 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 . The second tab 402 of the first electrode piece 100 a passes through the second through hole 210 b of the bottom wall 230 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 . The first tab 403 of the second electrode sheet 100 c passes through the third through hole 210 c of the top wall 210 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 . The second tab 404 of the second electrode sheet 100c passes through the fourth through hole 210d of the bottom wall 230 of the battery case 200 from the inner cavity of the battery case 200 , and protrudes to the outside of the battery case 200 .

可以理解的是，当电池1000还包括保护电路板(图未示)。保护电路板固定于电池外壳200。第一电极片100a的第一极耳401与第一电极片100a的第二极耳402可以共同电连接于保护电路板的正极端。示例性地，第一电极片100a的第一极耳401与第二极耳402可以通过并联后，再电连接于保护电路板的正极端第二电极片100c的第一极耳403和第二极耳404可以共同电连接于保护电路板的负极端。示例性地，第二电极片100c的第一极耳403和第二极耳404可以通过并联后，再电连接于保护电路板的负极端。It can be understood that when the battery 1000 also includes a protection circuit board (not shown). The protection circuit board is fixed on the battery casing 200 . The first tab 401 of the first electrode sheet 100a and the second tab 402 of the first electrode sheet 100a may be electrically connected to the positive end of the protection circuit board. Exemplarily, the first tab 401 and the second tab 402 of the first electrode sheet 100a can be electrically connected to the positive end of the protection circuit board after the first tab 401 and the second tab 402 of the first electrode sheet 100a are connected in parallel. The tabs 404 can be electrically connected to the negative terminal of the protection circuit board. Exemplarily, the first tab 403 and the second tab 404 of the second electrode sheet 100c may be electrically connected to the negative end of the protection circuit board after being connected in parallel.

第九种实施方式中，与第一种实施方式相同的技术内容不再赘述：请参阅图26和图27，图26是图3所示的第一电极片100a的再一种实施方式的结构示意图。图27是图26所示的第一电极片100a在H-H线处的部分剖面示意图。第一电极片100a包括集流体10、第一活性涂层20以及第二活性涂层30。可以理解的是，相较于第一种实施方式，本实施方式的第一电极片100a没有额外的设置极耳40。In the ninth embodiment, the same technical content as the first embodiment will not be repeated: please refer to Figure 26 and Figure 27, Figure 26 is the structure of another embodiment of the first electrode sheet 100a shown in Figure 3 schematic diagram. FIG. 27 is a schematic partial cross-sectional view of the first electrode sheet 100a shown in FIG. 26 at the line H-H. The first electrode sheet 100 a includes a current collector 10 , a first active coating 20 and a second active coating 30 . It can be understood that, compared with the first embodiment, the first electrode piece 100a of this embodiment is not additionally provided with tabs 40 .

示例性地，集流体10为导电材料。集流体10的材质可以为铜、铝、钛、不锈钢、其他金属合金、碳、石墨中的一种或者多种。Exemplarily, the current collector 10 is a conductive material. The material of the current collector 10 may be one or more of copper, aluminum, titanium, stainless steel, other metal alloys, carbon, and graphite.

另外，集流体10包括涂层部14和非涂层部15。非涂层部15连接于涂层部14。非涂层部15位于涂层部14的端部。其中，涂层部14具有背向设置的第一面141和第二面142。可以理解的是，当从Z轴方向看图26的集流体10时，也可以看到集流体10包括涂层部14和非涂层部15。In addition, the current collector 10 includes a coated portion 14 and a non-coated portion 15 . The non-coated portion 15 is connected to the coated portion 14 . The non-coated portion 15 is located at the end of the coated portion 14 . Wherein, the coating portion 14 has a first surface 141 and a second surface 142 disposed opposite to each other. It can be understood that when the current collector 10 in FIG. 26 is viewed from the Z-axis direction, it can also be seen that the current collector 10 includes a coated portion 14 and a non-coated portion 15 .

其中，第一活性涂层20位于第一面141。第二活性涂层30位于第二面142。这样，在Z轴的正方向上，第一活性涂层20、涂层部14以及第二活性涂层30依次层叠设置。Wherein, the first active coating layer 20 is located on the first surface 141 . The second active coating 30 is on the second face 142 . In this way, in the positive direction of the Z axis, the first active coating layer 20 , the coating portion 14 and the second active coating layer 30 are sequentially stacked.

请参阅图28，图28是图26所示的第一电极片100a应用于裸电芯100的一种实施方式的结构示意图。裸电芯100包括多个电池单元110。多个电池单元110沿Z轴的正方向排布。多个电池单元110可以沿Z轴的正方向层叠排布，也可以间隔排布。需要说明的是，电池单元110的数量不仅限于图28所示意的两个。在其他实施方式中，电池单元110的数量也可以大于两个。Please refer to FIG. 28 . FIG. 28 is a structural schematic diagram of an implementation manner in which the first electrode sheet 100 a shown in FIG. 26 is applied to the bare cell 100 . The bare cell 100 includes a plurality of battery cells 110 . A plurality of battery cells 110 are arranged along the positive direction of the Z axis. A plurality of battery cells 110 may be arranged in layers along the positive direction of the Z axis, or may be arranged at intervals. It should be noted that the number of battery cells 110 is not limited to two as shown in FIG. 28 . In other embodiments, the number of battery cells 110 may also be greater than two.

其中，每个电池单元110均包括第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d。其中，第一电极片100a、第一隔离膜100b、第二电极片100c以及第二隔离膜100d依次沿Z轴的正方向排布。第一电极片100a、第一隔离膜100b、第二电极片100c以及第二隔离膜100d可以依次层叠设置，也可以间隔设置。可以理解的是，第二电极片100c的结构可以采用与第一电极片100a的相同结构,也可以采用现有的电极片结构。具体的本申请实施方式不做限定。Wherein, each battery cell 110 includes a first electrode sheet 100a, a first separator 100b, a second electrode sheet 100c and a second separator 100d. Wherein, the first electrode sheet 100a, the first isolation film 100b, the second electrode sheet 100c and the second isolation film 100d are sequentially arranged along the positive direction of the Z axis. The first electrode sheet 100a, the first isolation film 100b, the second electrode sheet 100c, and the second isolation film 100d may be stacked sequentially, or may be arranged at intervals. It can be understood that the structure of the second electrode sheet 100c may be the same as that of the first electrode sheet 100a, or an existing electrode sheet structure may be used. The specific embodiment of the present application is not limited.

请再次参阅图28，每个第一电极片100a的集流体10的非涂层部15均相对设置。在本实施方式中，第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15相对设置。另外，第一个第一电极片100a的集流体10的非涂层部15的一端和第二个第一电极片100a的集流体10的非涂层部15的一端形成一体结构，也即第一个第一电极片100a的集流体10的非涂层部15的一端和第二个第一电极片100a的集流体10的非涂层部15形成一体结构。示例性地，第一个第一电极片100a的集流体10的非涂层部15的一端和第二个第一电极片100a的集流体10的非涂层部15的一端可以通过热压焊、冷压焊或者扩散焊等工艺彼此固定连接。Please refer to FIG. 28 again, the non-coated portion 15 of the current collector 10 of each first electrode sheet 100a is disposed opposite to each other. In this embodiment, the non-coated portion 15 of the current collector 10 of the first first electrode sheet 100a is opposite to the non-coated portion 15 of the current collector 10 of the second first electrode sheet 100a. In addition, one end of the non-coated portion 15 of the current collector 10 of the first first electrode sheet 100a and one end of the non-coated portion 15 of the current collector 10 of the second first electrode sheet 100a form an integral structure, that is, the first One end of the non-coated part 15 of the current collector 10 of one first electrode sheet 100a and the non-coated part 15 of the current collector 10 of the second first electrode sheet 100a form an integral structure. Exemplarily, one end of the non-coating portion 15 of the current collector 10 of the first first electrode sheet 100a and one end of the non-coating portion 15 of the current collector 10 of the second first electrode sheet 100a can be welded by thermocompression , cold pressure welding or diffusion welding and other processes are fixedly connected to each other.

需要说明的是，当第二电极片100c的结构可以采用与第一电极片100a相同的结构。每个第二电极片100c的集流体的非涂层部的连接方式可以参阅每个第一电极片100a的集流体10的非涂层部15的连接方式，也可以采用现有的方案实现连接。具体的本申请不做限定，因此图28没有具体示意每个第二电极片100c的集流体的非涂层部的连接方式。It should be noted that the structure of the second electrode sheet 100c may be the same as that of the first electrode sheet 100a. The connection method of the non-coated part of the current collector of each second electrode sheet 100c can refer to the connection method of the non-coated part 15 of the current collector 10 of each first electrode sheet 100a, or the existing scheme can be used to realize the connection. . The specific application is not limited, so FIG. 28 does not specifically illustrate the connection method of the non-coated part of the current collector of each second electrode sheet 100c.

在本实施方式中，通过将第一个第一电极片100a的集流体10的非涂层部15的一端和第二个第一电极片100a的集流体10的非涂层部15的一端形成一体结构，从而在裸电芯100应用于电池1000结构时，第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15的共同端可以直接自电池外壳200的内腔，穿过电池外壳200，并伸出至电池外壳200的外部。这样，一方面电池外壳200只需开设一个通孔，就可以使得第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15穿过电池外壳200，电池外壳200的结构强度较佳，另一方面，相较于第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15通过超声波焊接的方案，第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15之间是点连接。这样，第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15之间具有较大的缝隙，电池1000内部的电解液300容易经该缝隙流出。而本实施方式的第一个第一电极片100a的集流体10的非涂层部15的一端和第二个第一电极片100a的集流体10的非涂层部15的一端形成一体结构，第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15之间是面连接，第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15之间无缝隙，电池1000内部的电解液300不容易发生泄漏。再一方面，相较于第一个第一电极片100a的集流体10的非涂层部15和第二个第一电极片100a的集流体10的非涂层部15通过超声波焊接，并通过转接焊金属极耳的方案。这样，转接焊金属极耳不但会导致电芯结构复杂化，而且转接焊需要占用极片的空间，影响能量密度的方案。而本实施方式的第一个第一电极片100a的集流体10的非涂层部15的一端和第二个第一电极片100a的集流体10的非涂层部15的一端形成一体结构不会导致电芯结构复杂化，也不会占用电池1000的空间。In this embodiment, one end of the non-coating portion 15 of the current collector 10 of the first first electrode sheet 100a and one end of the non-coating portion 15 of the current collector 10 of the second first electrode sheet 100a are formed An integrated structure, so that when the bare cell 100 is applied to the structure of the battery 1000, the non-coated part 15 of the current collector 10 of the first first electrode sheet 100a and the non-coated part 15 of the current collector 10 of the second first electrode sheet 100a The common end of the layer portion 15 can directly pass through the battery case 200 from the inner cavity of the battery case 200 , and protrude to the outside of the battery case 200 . In this way, on the one hand, the battery case 200 only needs to open a through hole, so that the non-coating part 15 of the current collector 10 of the first first electrode sheet 100a and the non-coating part 15 of the current collector 10 of the second first electrode sheet 100a The coating part 15 passes through the battery casing 200, and the structural strength of the battery casing 200 is better. The non-coated part 15 of the current collector 10 of the electrode sheet 100a is ultrasonically welded, the non-coated part 15 of the current collector 10 of the first first electrode sheet 100a and the current collector 10 of the second first electrode sheet 100a The non-coating parts 15 are point connections. In this way, there is a large gap between the non-coated part 15 of the current collector 10 of the first first electrode sheet 100a and the non-coated part 15 of the current collector 10 of the second first electrode sheet 100a, and the inside of the battery 1000 The electrolyte solution 300 can easily flow out through the gap. In this embodiment, one end of the non-coated portion 15 of the current collector 10 of the first first electrode sheet 100a and one end of the non-coated portion 15 of the current collector 10 of the second first electrode sheet 100a form an integral structure, The non-coating portion 15 of the current collector 10 of the first first electrode sheet 100a and the non-coating portion 15 of the current collector 10 of the second first electrode sheet 100a are surface-connected, and the first first electrode sheet There is no gap between the non-coated part 15 of the current collector 10 of the second electrode sheet 100a and the non-coated part 15 of the current collector 10 of the second first electrode sheet 100a, and the electrolyte 300 inside the battery 1000 is not easy to leak. On the other hand, compared with the non-coating portion 15 of the current collector 10 of the first first electrode sheet 100a and the non-coating portion 15 of the current collector 10 of the second first electrode sheet 100a by ultrasonic welding, and by The scheme of transfer welding metal tabs. In this way, the transfer welding of metal tabs will not only complicate the structure of the battery core, but also require the space of the pole piece to be occupied by transfer welding, which will affect the energy density solution. However, in this embodiment, one end of the non-coated portion 15 of the current collector 10 of the first first electrode sheet 100a and one end of the non-coated portion 15 of the current collector 10 of the second first electrode sheet 100a form an integrated structure. It will cause the structure of the battery cell to be complicated, and the space of the battery 1000 will not be occupied.

上文介绍了裸电芯100的结构示意图。下文具体介绍裸电芯100的制备工艺的一种实施方式。请参阅图29，图29是图28所示的裸电芯100在形成过程中的结构示意图。The structure diagram of the bare cell 100 is introduced above. An implementation manner of the manufacturing process of the bare cell 100 is specifically introduced below. Please refer to FIG. 29 , which is a schematic structural diagram of the bare cell 100 shown in FIG. 28 during the formation process.

将多个电池单元110沿Z轴的正方向排布，其中每个电池单元110均包括第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d。其中，第一电极片100a、第一隔离膜100b、第二电极片100c以及第二隔离膜100d依次沿Z轴的正方向排布，相邻两个第一电极片100a的集流体10的非涂层部15相对设置。A plurality of battery cells 110 are arranged along the positive direction of the Z axis, wherein each battery cell 110 includes a first electrode sheet 100a, a first separator 100b, a second electrode sheet 100c and a second separator 100d. Wherein, the first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c, and the second separator 100d are sequentially arranged along the positive direction of the Z axis, and the current collectors 10 of two adjacent first electrode sheets 100a are not The coating part 15 is provided opposite.

将每个第一电极片100a的集流体10的非涂层部15的端部形成一个整体。示例性地，通过热压焊、冷压焊或者扩散焊等工艺将每个第一电极片100a的集流体10的非涂层部15的端部焊接成一个整体。The end of the non-coated portion 15 of the current collector 10 of each first electrode sheet 100a is integrally formed. Exemplarily, the end of the non-coated part 15 of the current collector 10 of each first electrode sheet 100a is welded into a whole by a process such as hot-press welding, cold-press welding or diffusion welding.

第十种实施方式中，与第一种实施方式相同的技术内容不再赘述：请参阅图30和图31，图30是图3所示的第一电极片100a的再一种实施方式的结构示意图。图31是图30所示的第一电极片100a在I-I线处的部分剖面示意图。第一电极片100a包括集流体10、第一活性涂层20以及第二活性涂层30。可以理解的是，相较于第一种实施方式，本实施方式的第一电极片100a没有额外的设置极耳40。In the tenth embodiment, the same technical content as the first embodiment will not be repeated: please refer to Figure 30 and Figure 31, Figure 30 is the structure of another embodiment of the first electrode sheet 100a shown in Figure 3 schematic diagram. FIG. 31 is a schematic partial cross-sectional view of the first electrode sheet 100a shown in FIG. 30 at the line I-I. The first electrode sheet 100 a includes a current collector 10 , a first active coating 20 and a second active coating 30 . It can be understood that, compared with the first embodiment, the first electrode piece 100a of this embodiment is not additionally provided with tabs 40 .

集流体10包括第一非涂层部15a、第二非涂层部15b、第三非涂层部15c和涂层部14。第一非涂层部15a、第二非涂层部15b、第三非涂层部15c位于涂层部14的同一侧，且间隔地连接于涂层部14。其中，涂层部14具有背向设置的第一面141和第二面142。可以理解的是，当从Z轴方向看图30的集流体10时，也可以看到集流体10包括第一非涂层部15a、第二非涂层部15b、第三非涂层部15c和涂层部14。The current collector 10 includes a first non-coating portion 15 a , a second non-coating portion 15 b , a third non-coating portion 15 c and a coating portion 14 . The first non-coating portion 15 a , the second non-coating portion 15 b , and the third non-coating portion 15 c are located on the same side of the coating portion 14 and are connected to the coating portion 14 at intervals. Wherein, the coating portion 14 has a first surface 141 and a second surface 142 disposed opposite to each other. It can be understood that, when looking at the current collector 10 in FIG. 30 from the Z-axis direction, it can also be seen that the current collector 10 includes a first non-coating portion 15a, a second non-coating portion 15b, and a third non-coating portion 15c. and coating section 14.

请参阅图32，图32是图30所示的第一电极片100a应用于裸电芯100的一种实施方式的部分分解示意图。本实施方式的第一电极片100a与第一隔离膜100b、第二电极片100c和第二隔离膜100d通过卷绕工艺形成裸电芯100。可以理解的是，第二电极片100c的结构可以采用与第一电极片100a的相同结构,也可以采用现有的电极片结构。具体的本申请实施方式不做限定。Please refer to FIG. 32 . FIG. 32 is a partially exploded schematic view of an implementation manner in which the first electrode sheet 100 a shown in FIG. 30 is applied to the bare cell 100 . The first electrode sheet 100a, the first isolation film 100b, the second electrode sheet 100c and the second isolation film 100d in this embodiment form the bare cell 100 through a winding process. It can be understood that the structure of the second electrode sheet 100c may be the same as that of the first electrode sheet 100a, or an existing electrode sheet structure may be used. The specific implementation manner of this application is not limited.

请参阅图33，并结合图30和图32所示，图33是图30所示的第一电极片100a应用于裸电芯100的一种实施方式的部分剖面示意图。第一电极片100a的集流体10的每个非涂层部15均彼此相对设置。在本实施方式中，第一非涂层部15a、第二非涂层部15b、第三非涂层部15c均相对设置。另外，第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部形成一体结构。示例性地，第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部可以通过热压焊、冷压焊或者扩散焊等工艺彼此固定连接。Please refer to FIG. 33 , combined with FIG. 30 and FIG. 32 , FIG. 33 is a partial cross-sectional schematic diagram of an implementation in which the first electrode sheet 100 a shown in FIG. 30 is applied to a bare cell 100 . Each non-coating portion 15 of the current collector 10 of the first electrode sheet 100a is disposed opposite to each other. In this embodiment, the first non-coating portion 15a, the second non-coating portion 15b, and the third non-coating portion 15c are all disposed opposite to each other. In addition, the end of the first non-coating portion 15a away from the coating portion 14, the end of the second non-coating portion 15b away from the coating portion 14, and the end of the third non-coating portion 15c away from the coating portion 14 are formed. One structure. Exemplarily, the first uncoated portion 15a is away from the end of the coated portion 14, the second uncoated portion 15b is away from the end of the coated portion 14, and the third uncoated portion 15c is away from the end of the coated portion 14 The parts can be fixedly connected to each other by processes such as hot-press welding, cold-press welding or diffusion welding.

需要说明的是，当第二电极片100c的结构可以采用与第一电极片100a相同的结构。每个第二电极片100c的集流体的非涂层部的连接方式可以参阅每个第一电极片100a的集流体10的非涂层部15的连接方式，也可以采用现有的方案实现连接。具体的本申请不做限定，因此图33没有具体示意每个第二电极片100c的集流体的非涂层部的连接方式。It should be noted that the structure of the second electrode sheet 100c may be the same as that of the first electrode sheet 100a. The connection method of the non-coated part of the current collector of each second electrode sheet 100c can refer to the connection method of the non-coated part 15 of the current collector 10 of each first electrode sheet 100a, or the existing scheme can be used to realize the connection. . The specific application is not limited, so FIG. 33 does not specifically illustrate the connection method of the non-coated part of the current collector of each second electrode sheet 100c.

在本实施方式中，通过将第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部形成一体结构，从而在裸电芯100应用于电池1000结构时，第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部可以作为共同端直接自电池外壳200的内腔，穿过电池外壳200，并伸出至电池外壳200的外部。这样，一方面电池外壳200只需开设一个通孔，就可以使得第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部穿过电池外壳200，电池外壳200的结构强度较佳，另一方面，相较于第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部通过超声波焊接的方案，第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部之间是点连接。这样，第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部之间具有较大的缝隙，电池1000内部的电解液300容易经该缝隙流出。而本实施方式的第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部形成一体结构，第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部之间是面连接，第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部之间无缝隙，电池1000内部的电解液300不容易发生泄漏。再一方面，相较于第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部通过超声波焊接，并通过转接焊金属极耳的方案。这样，转接焊金属极耳不但会导致电芯结构复杂化，而且转接焊需要占用极片的空间，影响能量密度的方案。而本实施方式的第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部形成一体结构不会导致电芯结构复杂化，也不会占用电池1000的空间。In this embodiment, by placing the first uncoated portion 15a away from the end of the coated portion 14, the second uncoated portion 15b away from the end of the coated portion 14, and the third uncoated portion 15c away from the coated The end of the part 14 forms an integral structure, so that when the bare cell 100 is applied to the structure of the battery 1000, the first non-coating part 15a is away from the end of the coating part 14, and the second non-coating part 15b is far away from the coating part 14 The end of the third non-coating portion 15c and the end of the third non-coating portion 15c away from the coating portion 14 can be used as a common end directly from the inner cavity of the battery case 200 , through the battery case 200 , and protrude to the outside of the battery case 200 . In this way, on the one hand, the battery case 200 only needs to open one through hole, so that the first non-coating portion 15a is away from the end of the coating portion 14, the second non-coating portion 15b is away from the end of the coating portion 14, and the second non-coating portion 15b is away from the end of the coating portion 14. The end of the third non-coating part 15c away from the coating part 14 passes through the battery case 200, the structural strength of the battery case 200 is better, on the other hand, compared with the end of the first non-coating part 15a away from the coating part 14 portion, the second non-coating portion 15b away from the end of the coating portion 14, the third non-coating portion 15c away from the end of the coating portion 14 by ultrasonic welding, the first non-coating portion 15a away from the coating portion 14, the end of the second non-coating portion 15b away from the coating portion 14, and the end of the third non-coating portion 15c away from the coating portion 14 are point connections. In this way, the first non-coating portion 15a is away from the end of the coating portion 14, the second non-coating portion 15b is away from the end of the coating portion 14, and the third non-coating portion 15c is away from the end of the coating portion 14. There is a large gap between them, and the electrolyte solution 300 inside the battery 1000 can easily flow out through the gap. In this embodiment, the first non-coating portion 15a is away from the end of the coating portion 14, the second non-coating portion 15b is away from the end of the coating portion 14, and the third non-coating portion 15c is away from the end of the coating portion 14. The ends form an integral structure, the first uncoated portion 15a is away from the end of the coated portion 14, the second uncoated portion 15b is away from the end of the coated portion 14, and the third uncoated portion 15c is away from the coated portion 14 There is a surface connection between the ends, the first non-coating part 15a is away from the end of the coating part 14, the second non-coating part 15b is away from the end of the coating part 14, and the third non-coating part 15c is away from the end of the coating part 14. There is no gap between the ends of the layer portion 14 , and the electrolyte solution 300 inside the battery 1000 is less likely to leak. On the other hand, compared with the end of the first non-coating portion 15a away from the coating portion 14, the second non-coating portion 15b away from the end of the coating portion 14, and the third non-coating portion 15c away from the coating portion The end of 14 is welded by ultrasonic waves, and the solution of metal tabs is passed through transfer welding. In this way, the transfer welding of metal tabs will not only complicate the structure of the battery core, but also require the space of the pole piece to be occupied by transfer welding, which will affect the energy density solution. In this embodiment, the first non-coating portion 15a is away from the end of the coating portion 14, the second non-coating portion 15b is away from the end of the coating portion 14, and the third non-coating portion 15c is away from the end of the coating portion 14. Forming an integrated structure at the ends will not complicate the structure of the cell, nor will it occupy the space of the battery 1000 .

上文介绍了裸电芯100的结构示意图。下文具体介绍裸电芯100的制备工艺的一种实施方式。请再次参阅图30至图33。The structure diagram of the bare cell 100 is introduced above. An implementation manner of the manufacturing process of the bare cell 100 is specifically introduced below. Please refer to Figure 30 to Figure 33 again.

将第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d依次层叠设置，其中，第一电极片100a包括集流体10、第一活性涂层20以及第二活性涂层30。集流体10包括第一非涂层部15a、第二非涂层部15b、第三非涂层部15c和涂层部14。第一非涂层部15a、第二非涂层部15b、第三非涂层部15c位于涂层部14的同一侧，且间隔连接于涂层部14。第一活性涂层20设于涂层部14的第一面141。第二活性涂层30设于涂层部14的第二面142。The first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c, and the second separator 100d are sequentially stacked, wherein the first electrode sheet 100a includes a current collector 10, a first active coating 20 and a second active layer. Coat 30. The current collector 10 includes a first non-coating portion 15 a , a second non-coating portion 15 b , a third non-coating portion 15 c and a coating portion 14 . The first non-coating portion 15 a , the second non-coating portion 15 b , and the third non-coating portion 15 c are located on the same side of the coating portion 14 , and are connected to the coating portion 14 at intervals. The first active coating 20 is disposed on the first surface 141 of the coating portion 14 . The second active coating 30 is disposed on the second surface 142 of the coating portion 14 .

将第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d沿第一方向卷绕，以使第一电极片100a、第一隔离膜100b、第二电极片100c和第二隔离膜100d形成卷曲状；The first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c and the second separator 100d are wound along the first direction so that the first electrode sheet 100a, the first separator 100b, the second electrode sheet 100c form a curl with the second isolation film 100d;

第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部形成一体结构。示例性地，第一非涂层部15a远离涂层部14的端部、第二非涂层部15b远离涂层部14的端部、第三非涂层部15c远离涂层部14的端部可以通过热压焊、冷压焊或者扩散焊等工艺彼此固定连接。The end of the first non-coating portion 15a away from the coating portion 14, the end of the second non-coating portion 15b away from the coating portion 14, and the end of the third non-coating portion 15c away from the coating portion 14 form an integral structure . Exemplarily, the first uncoated portion 15a is away from the end of the coated portion 14, the second uncoated portion 15b is away from the end of the coated portion 14, and the third uncoated portion 15c is away from the end of the coated portion 14 The parts can be fixedly connected to each other by processes such as hot-press welding, cold-press welding or diffusion welding.

以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

一种第一电极片(100a)，其特征在于，包括集流体(10)、第一活性涂层(20)、第二活性涂层(30)以及极耳(40)，从第一方向看，所述集流体(10)包括绝缘层(11)、第一导电层(12)以及第二导电层(13)，所述绝缘层(11)位于所述第一导电层(12)和所述第二导电层(13)之间；A first electrode sheet (100a), characterized by comprising a current collector (10), a first active coating (20), a second active coating (30) and tabs (40), viewed from a first direction , the current collector (10) includes an insulating layer (11), a first conductive layer (12) and a second conductive layer (13), the insulating layer (11) is located between the first conductive layer (12) and the between the second conductive layer (13);

从第二方向看，所述集流体(10)包括涂层部(14)以及连接所述涂层部(14)的非涂层部(15)，所述第一活性涂层(20)位于所述涂层部(14)的第一导电层(122)，所述第二活性涂层(30)位于所述涂层部(14)的第二导电层(132)；所述第一方向和所述第二方向不同；Viewed from the second direction, the current collector (10) includes a coating part (14) and a non-coating part (15) connected to the coating part (14), and the first active coating (20) is located The first conductive layer (122) of the coating part (14), the second active coating (30) is located on the second conductive layer (132) of the coating part (14); the first direction different from said second direction;

所述非涂层部(15)包括弯折部分(151)以及连接所述弯折部分(151)的平坦部分(152)，所述平坦部(152)的第一端与所述涂层部(14)连接，所述平坦部(152)的第二端与所述弯折部分(151)的第一端连接，所述弯折部分(151)的第二端的第一导电层(1211)与所述平坦部分(152)的第二导电层(1312)朝向同一侧；所述极耳(40)电连接于所述弯折部分(151)的第二端的第一导电层(1211)和所述平坦部分(152)的第二导电层(1312)。The non-coated portion (15) includes a bent portion (151) and a flat portion (152) connecting the bent portion (151), the first end of the flat portion (152) is connected to the coated portion (14) Connection, the second end of the flat portion (152) is connected to the first end of the bent portion (151), and the first conductive layer (1211) at the second end of the bent portion (151) facing the same side as the second conductive layer (1312) of the flat part (152); the tab (40) is electrically connected to the first conductive layer (1211) at the second end of the bent part (151) and A second conductive layer (1312) of the planar portion (152).
根据权利要求1所述的第一电极片(100a)，其特征在于，所述弯折部分(151)在基准面投影的面积小于所述平坦部分(152)在所述基准面的投影的面积，所述基准面为所述涂层部所在平面。The first electrode sheet (100a) according to claim 1, characterized in that, the projected area of the bent portion (151) on the reference plane is smaller than the projected area of the flat portion (152) on the reference plane , the reference plane is the plane where the coating part is located.
根据权利要求2所述的第一电极片(100a)，其特征在于，在所述集流体(10)的宽度方向上，所述弯折部分(151)的尺寸小于所述平坦部分(152)的尺寸。The first electrode sheet (100a) according to claim 2, characterized in that, in the width direction of the current collector (10), the size of the bent portion (151) is smaller than that of the flat portion (152) size of.
根据权利要求3所述的第一电极片(100a)，其特征在于，所述极耳(40)与所述弯折部分(151)的第二端的第一导电层(1211)的连接位置为第一位置M，所述极耳(40)与所述平坦部分(152)的第二导电层(1312)的连接位置为第二位置N，所述第一位置M与所述第二位置N的排布方向平行于所述集流体(10)的宽度方向。The first electrode sheet (100a) according to claim 3, characterized in that, the connection position between the tab (40) and the first conductive layer (1211) at the second end of the bent portion (151) is The first position M, the connection position between the tab (40) and the second conductive layer (1312) of the flat part (152) is the second position N, the first position M and the second position N The arrangement direction is parallel to the width direction of the current collector (10).
根据权利要求2所述的第一电极片(100a)，其特征在于，在所述集流体(10)的宽度方向上，所述弯折部分(151)的尺寸等于所述平坦部分(152)的尺寸。The first electrode sheet (100a) according to claim 2, characterized in that, in the width direction of the current collector (10), the size of the bent portion (151) is equal to that of the flat portion (152) size of.
根据权利要求1至5中任意一项所述的第一电极片(100a)，其特征在于，所述弯折部分(151)层叠于所述平坦部分(152)，所述弯折部分(151)的第二端的第二导电层(1311)与所述平坦部分(152)的第二导电层(1312)接触。The first electrode sheet (100a) according to any one of claims 1 to 5, characterized in that, the bent portion (151) is stacked on the flat portion (152), and the bent portion (151 The second conductive layer (1311) of the second end of ) is in contact with the second conductive layer (1312) of the planar portion (152).
根据权利要求1至6中任一项所述的第一电极片(100a)，其特征在于，所述非涂层部(15)连接于所述涂层部(14)的端部或者中部。The first electrode sheet (100a) according to any one of claims 1 to 6, characterized in that the non-coated part (15) is connected to an end or a middle part of the coated part (14).
一种第一电极片(100a)，其特征在于，包括集流体(10)、第一活性涂层(20)、第二活性涂层(30)以及极耳(40)，从第一方向看，所述集流体(10)包括绝缘层(11)、第一导电层(12)以及第二导电层(13)，所述绝缘层(11)位于所述第一导电层(12)和所述第二导电层(13)之间；A first electrode sheet (100a), characterized by comprising a current collector (10), a first active coating (20), a second active coating (30) and tabs (40), viewed from a first direction , the current collector (10) includes an insulating layer (11), a first conductive layer (12) and a second conductive layer (13), the insulating layer (11) is located between the first conductive layer (12) and the between the second conductive layer (13);

从第二方向看，所述集流体(10)包括涂层部(14)以及连接所述涂层部(14)的非涂层部(15)，所述第一活性涂层(20)位于所述涂层部(14)的第一导电层(122)，所述第二活性涂层(30)位于所述涂层部(14)的第二导电层(132)；所述第一方向和所述第二方向不同；Viewed from the second direction, the current collector (10) includes a coating part (14) and a non-coating part (15) connected to the coating part (14), and the first active coating (20) is located The first conductive layer (122) of the coating part (14), the second active coating (30) is located on the second conductive layer (132) of the coating part (14); the first direction different from said second direction;

所述非涂层部(15)包括弯折部分(151)以及连接所述弯折部分(151)的平坦部分(152)，所述平坦部(152)的第一端与所述涂层部(14)连接，所述平坦部(152)的第二端与所述弯折部分(151)的第一端连接，所述弯折部分(151)的第二端的第一导电层(1211)与所述平坦部分(152)的第二导电层(1312)相邻且相对设置；所述极耳(40)电连接于所述弯折部分(151)的第二端的第一导电层(1211)和所述平坦部分(152)的第二导电层(1312)。The non-coated portion (15) includes a bent portion (151) and a flat portion (152) connecting the bent portion (151), the first end of the flat portion (152) is connected to the coated portion (14) Connection, the second end of the flat portion (152) is connected to the first end of the bent portion (151), and the first conductive layer (1211) at the second end of the bent portion (151) Adjacent to and opposite to the second conductive layer (1312) of the flat portion (152); the tab (40) is electrically connected to the first conductive layer (1211) at the second end of the bent portion (151) ) and the second conductive layer (1312) of the planar portion (152).
根据权利要求8所述的第一电极片(100a)，其特征在于，所述弯折部分(151)的第一导电层(1211)包括依次连接的第一段(12a)、第二段(12b)、第三段(12c)以及第四段(12d)，所述弯折部分(151)的绝缘层(1111)的第二段(12b)与所述平坦部分(152)的绝缘层(1112)相对设置；The first electrode sheet (100a) according to claim 8, characterized in that, the first conductive layer (1211) of the bent portion (151) comprises a first segment (12a), a second segment ( 12b), the third segment (12c) and the fourth segment (12d), the second segment (12b) of the insulating layer (1111) of the bent portion (151) and the insulating layer of the flat portion (152) ( 1112) relative setting;

所述弯折部分(151)的第一导电层(1211)的第四段(12d)为所述弯折部分(151)的第二端的第一导电层(1211)。The fourth section (12d) of the first conductive layer (1211) of the bent portion (151) is the first conductive layer (1211) of the second end of the bent portion (151).
一种裸电芯(100)，其特征在于，包括第一隔离膜(100b)、第二隔离膜(100d)、第二电极片(100c)以及如权利要求1至9中任意一项所述的第一电极片(100a)；A bare cell (100), characterized by comprising a first isolation film (100b), a second isolation film (100d), a second electrode sheet (100c) and any one of claims 1 to 9 The first electrode sheet (100a);

所述第一电极片(100a)、所述第一隔离膜(100b)、所述第二电极片(100c)与所述第二隔离膜(100d)依次设置，所述第一电极片(100a)、所述第一隔离膜(100b)、所述第二电极片(100c)与所述第二隔离膜(100d)呈卷曲状。The first electrode sheet (100a), the first separator (100b), the second electrode sheet (100c) and the second separator (100d) are arranged in sequence, and the first electrode sheet (100a ), the first separator (100b), the second electrode sheet (100c) and the second separator (100d) are curled.
一种裸电芯(100)，其特征在于，包括多个电池单元(110)；每个所述电池单元(110)均包括第一隔离膜(100b)、第二隔离膜(100d)、第二电极片(100c)以及如权利要求1至9中任意一项所述的第一电极片(100a)，所述第一电极片(100a)、所述第一隔离膜(100b)、所述第二电极片(100c)与所述第二隔离膜(100d)依次排布。A bare cell (100), characterized in that it includes a plurality of battery cells (110); each of the battery cells (110) includes a first separator (100b), a second separator (100d), a second separator Two electrode sheets (100c) and the first electrode sheet (100a) according to any one of claims 1 to 9, the first electrode sheet (100a), the first separator (100b), the The second electrode sheet (100c) and the second isolation film (100d) are arranged in sequence.
根据权利要求11所述的裸电芯(100)，其特征在于，多个所述电池单元(110)的第一电极片(100a)的极耳(40)的端部为一体成型结构。The bare cell (100) according to claim 11, characterized in that the ends of the tabs (40) of the first electrode sheets (100a) of the plurality of battery cells (110) are integrally formed.
根据权利要求11所述的裸电芯(100)，其特征在于，相邻两个所述电池单元(110)的弯折部分(151)的第一导电层(1211)的第二端相向设置，相邻两个所述电池单元(110)的第一电极片(100a)的极耳(40)为一体成型结构。The bare cell (100) according to claim 11, characterized in that, the second ends of the first conductive layers (1211) of the bent parts (151) of two adjacent battery cells (110) are arranged opposite to each other The tabs (40) of the first electrode sheets (100a) of two adjacent battery cells (110) are integrally formed.
一种电池(1000)，其特征在于，包括电池外壳(200)、电解液(300)以及如权利要求10至13中任一项所述的裸电芯(100)，所述电池外壳(200)具有内腔；A battery (1000), characterized in that it comprises a battery casing (200), an electrolyte (300) and the bare cell (100) according to any one of claims 10 to 13, the battery casing (200 ) has a lumen;

所述裸电芯(100)的一部分设置于所述电池外壳(200)的内腔，所述裸电芯(100)的第一电极片(100a)的极耳(40)自所述电池外壳(200)的内腔伸出所述电池外壳(200)的外部；A part of the bare cell (100) is disposed in the inner cavity of the battery casing (200), and the tab (40) of the first electrode sheet (100a) of the bare cell (100) is lifted from the battery casing The inner cavity of (200) protrudes from the outside of the battery casing (200);

所述电解液(300)设置于所述电池外壳(200)的内腔，所述裸电芯(100)的一部分设置于所述电解液(300)内。The electrolyte (300) is arranged in the inner cavity of the battery casing (200), and a part of the bare cell (100) is arranged in the electrolyte (300).
一种电子设备(1)，其特征在于，包括设备壳体(2000)以及如权利要求14所述的电池(1000)，所述电池(1000)设于所述设备壳体(2000)。An electronic device (1), characterized by comprising a device casing (2000) and the battery (1000) according to claim 14, the battery (1000) being arranged in the device casing (2000).
一种第一电极片(100a)，其特征在于，包括集流体(10)、第一活性涂层(20)、第二活性涂层(30)、第一极耳(401)以及第二极耳(402)，从第一方向看，所述集流体(10)包括绝缘层(11)、第一导电层(12)以及第二导电层(13)，所述绝缘层(11)位于所述第一导电层(12)和所述第二导电层(13)之间；A first electrode sheet (100a), characterized by comprising a current collector (10), a first active coating (20), a second active coating (30), a first tab (401) and a second pole ear (402), viewed from the first direction, the current collector (10) includes an insulating layer (11), a first conductive layer (12) and a second conductive layer (13), and the insulating layer (11) is located at the between the first conductive layer (12) and the second conductive layer (13);

从第二方向看，所述集流体(10)包括第一非涂层部(15a)、第二非涂层部(15b)以及涂层部(14)，所述涂层部(14)连接于所述第一非涂层部(15a)和所述第二非涂层部(15b)之间，所述第一活性涂层(20)位于所述涂层部(14)的第一导电层(122)，所述第二活性涂层(30)位于所述涂层部(14)的第二导电层(132)；所述第一方向和所述第二方向不同；Viewed from the second direction, the current collector (10) includes a first non-coating portion (15a), a second non-coating portion (15b) and a coating portion (14), and the coating portion (14) is connected to Between the first non-coating part (15a) and the second non-coating part (15b), the first active coating (20) is located on the first conductive layer of the coating part (14). layer (122), said second active coating (30) is located on a second conductive layer (132) of said coating portion (14); said first direction and said second direction are different;

所述第一极耳(401)电连接于所述第一非涂层部(15a)的第一导电层(121)，所述第二极耳(402)电连接于所述第二非涂层部(15b)的第二导电层(133)。The first tab (401) is electrically connected to the first conductive layer (121) of the first non-coated part (15a), and the second tab (402) is electrically connected to the second non-coated part (15a). The second conductive layer (133) of the layer portion (15b).
根据权利要求16所述的第一电极片(100a)，其特征在于，所述第一极耳(401)伸出所述集流体(10)的部分与所述第二极耳(402)伸出所述集流体(10)的部分位于所述集流体(10)的同一侧，或者位于所述集流体(10)的不同侧。The first electrode sheet (100a) according to claim 16, characterized in that, the part of the first tab (401) protruding from the current collector (10) is the same as the part extending from the second tab (402) The part out of the current collector (10) is located on the same side of the current collector (10), or on different sides of the current collector (10).
一种电池(1000)，其特征在于，包括电池外壳(200)、电解液(300)以及裸电芯(100)，所述电池外壳(200)具有内腔，部分所述裸电芯(100)设置于所述电池外壳(200)的内腔；A battery (1000), characterized in that it comprises a battery casing (200), an electrolyte (300) and a bare cell (100), the battery casing (200) has an inner cavity, and part of the bare cell (100) ) is disposed in the inner cavity of the battery case (200);

所述裸电芯(100)包括第一隔离膜(100b)、第二隔离膜(100d)、第二电极片(100c)以及如权利要求16或17所述的第一电极片(100a)，所述第一电极片(100a)、所述第一隔离膜(100b)、所述第二电极片(100c)与所述第二隔离膜(100d)依次设置，所述裸电芯(100)的第一电极片(100a)的第一极耳(401)和第二极耳(402)分别自所述电池外壳(200)的内腔伸出所述电池外壳(200)的外部，并共同电连接于所述电池外壳(200)外部的电极端；The bare cell (100) comprises a first separator (100b), a second separator (100d), a second electrode sheet (100c) and the first electrode sheet (100a) according to claim 16 or 17, The first electrode sheet (100a), the first separator (100b), the second electrode sheet (100c) and the second separator (100d) are arranged in sequence, and the bare cell (100) The first tab (401) and the second tab (402) of the first electrode sheet (100a) protrude from the inner cavity of the battery case (200) to the outside of the battery case (200), and together electrically connected to the electrode terminals outside the battery case (200);

所述电解液(300)设置于所述电池外壳(200)的内腔，所述裸电芯(100)的一部分设置于所述电解液(300)内。The electrolyte (300) is arranged in the inner cavity of the battery casing (200), and a part of the bare cell (100) is arranged in the electrolyte (300).