WO2014190647A1

WO2014190647A1 - Battery and manufacture thereof, aluminum plastic film encapsulation method and mold, aluminum plastic film casing, and molding device

Info

Publication number: WO2014190647A1
Application number: PCT/CN2013/084443
Authority: WO
Inventors: 周晓玲; 何安轩; 殷振国
Original assignee: 深圳市格瑞普电池有限公司
Priority date: 2013-05-31
Filing date: 2013-09-27
Publication date: 2014-12-04
Also published as: DE112014002625T5; CN103441307A; WO2014190765A1

Abstract

A method of manufacturing a laminated lithium ion battery, comprising: laminating a cathode plate (1301) and an anode plate (500) to obtain a laminated battery cell body (801), a separator being disposed between any anode plate and cathode plate in the laminated battery cell body; fixing the middle of the laminated battery cell body; naturally placing the laminated battery cell body on the top of an arc-shaped bracket (802); hot pressing the laminated battery cell body to enable each separator in the laminated battery cell body to bond to the anode plate and cathode plate of the separator; leaving the laminated battery cell body to stand until the laminated battery cell body becomes arc shaped; placing the arc-shaped laminated battery cell body into the battery cell body recess (1002) of the aluminum plastic film casing; covering the top surface of the arc-shaped laminated battery cell body with the top-surface aluminum plastic film layer of the aluminum plastic film casing; and heat sealing the aluminum plastic film, thus allowing the arc-shaped laminated battery cell body to be encapsulated in the aluminum plastic film casing to obtain a laminated lithium ion battery.

Description

电池及制备及铝塑膜封装方法及模具及铝塑膜壳体及成型装置技术领域 Battery and preparation and aluminum plastic film packaging method and mold and aluminum plastic film casing and molding device

本发明涉及锂离子电池领域，特别涉及一种电池及制备及铝塑膜封装方法及模具及铝塑膜壳体及成型装置。背景技术 The invention relates to the field of lithium ion batteries, in particular to a battery, a preparation method and an aluminum plastic film packaging method, a mold and an aluminum plastic film casing and a molding device. Background technique

由于锂离子电池具有高能量密度，高输出电压，高输出功率等优点而被广泛应用。目前的锂离子电池主要为圆柱，方形，纽扣等形状，但随着锂离子电池的应用不断扩展到各个领域，其他形状的锂离子电池也越来越受到关注，比如应用在计步器上的电池，就需要一种弯曲的锂离子电池。 Lithium-ion batteries are widely used due to their high energy density, high output voltage, and high output power. The current lithium-ion batteries are mainly in the shape of cylinders, squares, buttons, etc., but as the application of lithium-ion batteries continues to expand into various fields, other shapes of lithium-ion batteries are receiving more and more attention, such as those applied to pedometers. A battery requires a curved lithium-ion battery.

在进行本发明研究过程中，发明人发现现有技术至少存在如下问题：目前市场上少有的弯曲的锂离子电池是在电池制作完成后用治具使其弯曲，很大程度上损坏了电池的极片和结构，降低了电池的电化学性能，还存在安全隐患；此外，弯曲电池的过程中使电池表面产生褶皱，外观难看。发明内容 During the research of the present invention, the inventors found that the prior art has at least the following problems: At present, the rare curved lithium ion battery on the market is bent with a jig after the battery is fabricated, and the battery is largely damaged. The pole piece and structure reduce the electrochemical performance of the battery, and there are also safety hazards; in addition, the battery surface is wrinkled during the process of bending the battery, and the appearance is unsightly. Summary of the invention

本发明实施例目的之一在于：提供叠片锂离子电池的制备方法以及其制成的电池，应用该技术方案有利于改善产品的外观以及提高电化性能。 One of the objects of the embodiments of the present invention is to provide a method for fabricating a laminated lithium ion battery and a battery thereof, which is advantageous for improving the appearance of the product and improving the electrochemical performance.

本发明实施例目的之二在于：提供弧形锂离子电池的铝塑膜封装的方法，应用该技术方案有利于改善产品的外观以及提高电化性能。 The second object of the embodiments of the present invention is to provide a method for packaging an aluminum plastic film of a curved lithium ion battery, and the application of the technical solution is beneficial to improving the appearance of the product and improving the electrochemical performance.

本发明实施例目的之三在于：提供用于锂离子叠片体成型的装置，应用该技术方案有利于改善产品的外观以及提高电化性能。 The third object of the embodiments of the present invention is to provide a device for forming a lithium ion laminated body, which is advantageous for improving the appearance of the product and improving the electrochemical performance.

本发明实施例目的之四在于：提供铝塑膜壳体，应用该技术方案有利于改善产品的外观以及提高电化性能。 The fourth object of the embodiment of the present invention is to provide an aluminum plastic film casing, and the application of the technical solution is advantageous for improving the appearance of the product and improving the electrochemical performance.

本发明实施例目的之五在于：提供一种叠片锂离子电池，应用该技术方案有利于改善产品的外观以及提高电化性能。 The fifth object of the embodiments of the present invention is to provide a laminated lithium ion battery, which is advantageous for improving the appearance of the product and improving the electrochemical performance.

本发明实施例目的之六在于：提供用于铝塑膜封装模具，应用该技术方案有利于改善产品的外观以及提高电化性能。 The sixth objective of the embodiments of the present invention is to provide a mold for an aluminum plastic film package, and the application of the technical solution is advantageous for improving the appearance of the product and improving the electrochemical performance.

第一方面，本发明实施例提供的一种叠片锂离子电池的制备方法，包括：层叠负极片、正极片得到层叠电芯体，在所述层叠电芯体内任一所述正极片、负极片之间分别间隔有一隔膜层， In a first aspect, a method for fabricating a laminated lithium ion battery according to an embodiment of the invention includes: laminating a negative electrode sheet and a positive electrode sheet to obtain a laminated electric core body, and any one of the positive electrodes in the laminated electric core body The diaphragm and the negative electrode are respectively separated by a diaphragm layer.

固定所述层叠电芯体的中部，将所述层叠电芯体自然搁置于一弧形支架的顶部，在所述弧形支架上热压所述层叠电芯体至预定时间，使所述层叠电芯体内各隔膜层分别与所述隔膜层相邻的所述正极片、负极片相互粘结在一起；在所述弧形支架上静置所述层叠电芯体直至所述层叠电芯体定型成与所述弧形支架相匹配的弧形，得到弧形层叠电芯体； Fixing a middle portion of the laminated battery body, naturally placing the laminated battery core on top of an arc-shaped bracket, and hot-pressing the laminated battery core body on the curved bracket for a predetermined time to make the stack The positive electrode sheet and the negative electrode sheet adjacent to the diaphragm layer in each of the diaphragm layers in the core body are bonded to each other; and the laminated battery core body is left on the curved bracket until the laminated core body Forming an arc matching the curved bracket to obtain an arc-shaped laminated core body;

将所述弧形层叠电芯体置入铝塑膜壳体的电芯体凹位内，所述电芯体凹位的顶面的弧度与所述弧形层叠电芯体的弧度相匹配，使所述弧形层叠电芯体的底面与所述电芯体凹位的顶面面对面贴合，在所述弧形层叠电芯体的顶面覆盖铝塑膜壳体的顶面铝塑膜层，热封铝塑膜，使所述弧形层叠电芯体封装在所述铝塑膜壳体内，即得所述叠片锂离子电池。 Inserting the curved laminated electric core body into a recess of the electric core body of the aluminum plastic film casing, the curvature of the top surface of the concave portion of the electric core body matching the curvature of the curved laminated electric core body, Laying the bottom surface of the curved laminated core body face-to-face with the top surface of the recessed portion of the electric core body, and covering the top surface of the aluminum-plastic film casing with the top surface of the curved laminated electric core body And laminating the aluminum plastic film, and encapsulating the curved laminated electric core body in the aluminum plastic film casing, that is, the laminated lithium ion battery.

结合第一方面，在第一种实现方式下，各所述隔膜层的顶面以及底面分别涂布有聚偏氟乙烯层； In combination with the first aspect, in the first implementation, the top surface and the bottom surface of each of the diaphragm layers are respectively coated with a polyvinylidene fluoride layer;

使所述层叠电芯体内各隔膜层分别与所述隔膜层相邻的所述正极片、负极片相互粘结在一起，具体是： The positive electrode sheets and the negative electrode sheets respectively adjacent to the separator layers in the respective separator layers in the laminated electrode core are bonded to each other, specifically:

在所述热压温度下，所述层叠电芯体内的各聚偏氟乙烯层与所述正极片、负极片粘结在一起。 At the hot pressing temperature, each polyvinylidene fluoride layer in the laminated battery body is bonded to the positive electrode sheet and the negative electrode sheet.

结合第一方面，在第一种实现方式下，层叠负极片、正极片得到层叠电芯体，在所述层叠电芯体内任一所述正极片、负极片之间分别间隔有一隔膜层，具体是： According to the first aspect, in a first implementation manner, a negative electrode sheet and a positive electrode sheet are laminated to obtain a laminated battery body, and a separator layer is respectively disposed between any of the positive electrode sheets and the negative electrode sheets in the laminated battery body. Yes:

层叠所述负极片、正极片隔膜袋得到所述层叠电芯体，在所述由两隔膜片制成的正极片隔膜袋内分别置入有一所述正极片。 The negative electrode sheet and the positive electrode sheet separator bag were laminated to obtain the laminated battery body, and the positive electrode sheet was placed in each of the positive electrode sheet separator bags made of the two separator sheets.

结合第一方面，在第一种实现方式下，在所述由两隔膜片制成的正极片隔膜袋内分别置入一所述正极片，得到各所述正极片隔膜袋，包括： In combination with the first aspect, in the first embodiment, a positive electrode sheet is respectively placed in the positive electrode sheet membrane bag made of the two diaphragm sheets, and the positive electrode sheet separator bag is obtained, including:

在每正极片的顶面、底面分别放置第一隔膜、第二隔膜，使所述正极片被所述第一隔膜、第二隔膜上下正对覆盖，热封所述第一隔膜、第二隔膜的至少两纵向边缘，在两所述纵向边缘上分别形成不相连续的至少两个热封封口，所述第一隔膜、第二隔膜在各所述热封封口处热熔连接，即得所述正极片隔膜袋。 A first diaphragm and a second diaphragm are respectively disposed on the top surface and the bottom surface of each positive electrode sheet, so that the positive electrode sheet is covered by the first diaphragm and the second diaphragm in a vertical direction, and the first diaphragm and the second diaphragm are heat sealed. At least two longitudinal edges, at least two heat seals are formed on the two longitudinal edges, respectively, and the first diaphragm and the second diaphragm are thermally fused at each of the heat seals, that is, The positive electrode diaphragm bag is described.

结合第一方面，在第一种实现方式下，热封所述第一隔膜、第二隔膜的至少两纵向边缘，在两所述纵向边缘上分别形成不相连续的至少两个热封封口，具体是： In combination with the first aspect, in the first implementation, heat sealing the first diaphragm and the second diaphragm to There are two longitudinal edges, and at least two heat seals are formed on the two longitudinal edges, which are not continuous.

热封所述第一隔膜、第二隔膜的四周边缘，在所述第一隔膜、第二隔膜的四周边缘上均形成有所述热封封口。 The peripheral edges of the first diaphragm and the second diaphragm are heat sealed, and the heat seal seal is formed on the peripheral edges of the first diaphragm and the second diaphragm.

在每正极片的顶面、底面分别放置第一隔膜、第二隔膜，使所述正极片被所述第一隔膜、第二隔膜上下正对覆盖，热封所述第一隔膜、第二隔膜的至少一宽度端部，在所述宽度端部上形成热封封口，所述第一隔膜、第二隔膜在所述热封封口处热熔连接，即得所述正极片隔膜袋。 A first diaphragm and a second diaphragm are respectively disposed on the top surface and the bottom surface of each positive electrode sheet, so that the positive electrode sheet is covered by the first diaphragm and the second diaphragm in a vertical direction, and the first diaphragm and the second diaphragm are heat sealed. At least one width end portion, a heat sealing seal is formed on the width end portion, and the first diaphragm and the second diaphragm are thermally fusion-bonded at the heat sealing seal, that is, the positive electrode sheet separator bag is obtained.

结合第一方面，在第一种实现方式下，热封所述第一隔膜、第二隔膜的至少一宽度端部，具体是： In combination with the first aspect, in the first implementation, at least one width end of the first diaphragm and the second diaphragm are heat sealed, specifically:

在至少一所述宽度端部上形成不相互连续的至少两个所述热封封口，或者， Forming at least two of the heat seal seals that are not continuous with each other on at least one of the width ends, or

在至少一所述宽度端部上形成连续的所述热封封口。 A continuous heat seal is formed on at least one of the width ends.

热封所述第一隔膜、第二隔膜上、所述正极片的极耳焊接部在所述第一宽度端部伸出所在的第一宽度端部； Heat sealing the first diaphragm, the second diaphragm, and the tab welded portion of the positive electrode tab at a first width end where the first width end protrudes;

或者，热封所述第一隔膜、第二隔膜上、所述正极片的极耳焊接部相对的第二宽度端部； Or heat sealing the second width end of the first diaphragm, the second diaphragm, and the tab welding portion of the positive electrode tab;

或者，热封所述第一隔膜、第二隔膜上的两宽度端部。 Alternatively, heat-sealing the two width ends of the first diaphragm and the second diaphragm.

在每正极片的顶面、底面分别放置第一隔膜、第二隔膜，使所述正极片被所述第一隔膜、第二隔膜上下正对覆盖，热封所述第一隔膜、第二隔膜的四个顶角的至少任意两个，形成热封封口，所述第一隔膜、第二隔膜在各所述热封封口处热熔连接，即得所述正极片隔膜袋。 A first diaphragm and a second diaphragm are respectively disposed on the top surface and the bottom surface of each positive electrode sheet, so that the positive electrode sheet is covered by the first diaphragm and the second diaphragm in a vertical direction, and the first diaphragm and the second diaphragm are heat sealed. At least any two of the four apex angles form a heat seal, and the first diaphragm and the second diaphragm are thermally fused at each of the heat seals to obtain the positive diaphragm separator bag.

结合第一方面，在第一种实现方式下，热封所述第一隔膜、第二隔膜的四个顶角的至少任意两个，具体是； In combination with the first aspect, in the first implementation, the first diaphragm and the second diaphragm are heat sealed. At least any two of the top corners, specifically;

热封所述第一隔膜、第二隔膜的四个所述顶角； Heat sealing the four apex angles of the first diaphragm and the second diaphragm;

或者，热封所述第一隔膜、第二隔膜的任意两个相对的所述顶角。 Alternatively, any two opposing apex angles of the first membrane and the second membrane are heat sealed.

在所述正极片的顶面、底面分别放置第一隔膜、第二隔膜，使所述正极片被所述第一隔膜、第二隔膜上下正对覆盖， A first diaphragm and a second diaphragm are respectively disposed on the top surface and the bottom surface of the positive electrode sheet, so that the positive electrode sheet is covered by the first diaphragm and the second diaphragm.

以预定的温度以及压力，面对面热封所述第一隔膜、正极片以及第二隔膜，使所述第一隔膜、正极片以及第二隔膜的表面上下粘合在一起，即得所述正极片隔膜袋。 The first separator, the positive electrode sheet and the second separator are heat-sealed face-to-face at a predetermined temperature and pressure, and the surfaces of the first separator, the positive electrode sheet and the second separator are bonded to each other up and down, that is, the positive electrode sheet is obtained. Diaphragm bag.

沿所述第一隔膜、第二隔膜超出所述正极片的边缘，激光点焊层叠的所述第一隔膜、第二隔膜，使所述第一隔膜、第二隔膜连接在一起，即得所述正极片隔膜袋。 Between the first diaphragm and the second diaphragm beyond the edge of the positive electrode sheet, the first diaphragm and the second diaphragm are laminated by laser spot welding, so that the first diaphragm and the second diaphragm are connected together. The positive electrode diaphragm bag is described.

结合第一方面，在第一种实现方式下，在所述弧形层叠电芯体内，沿所述弧形层叠电芯体的弧形由内到外方向，所述正极片、负极片的自然长度由短到长变化。 In combination with the first aspect, in the first implementation manner, in the arc-shaped laminated battery body, the arc shape of the arc-shaped laminated electric core body is from the inside to the outside, and the positive electrode piece and the negative electrode piece are natural. The length varies from short to long.

结合第一方面，在第一种实现方式下，各所述第一隔膜、第二隔膜的顶面以及底面分别涂布有聚偏氟乙烯层； In combination with the first aspect, in a first implementation manner, the top surface and the bottom surface of each of the first diaphragm and the second diaphragm are respectively coated with a polyvinylidene fluoride layer;

在所述热压温度下，所述层叠电芯体内的各聚偏氟乙烯层与所述聚偏氟乙烯层相邻的所述正极片、负极片粘结在一起。 At the hot pressing temperature, each of the polyvinylidene fluoride layers in the laminated battery body and the positive electrode sheet and the negative electrode sheet adjacent to the polyvinylidene fluoride layer are bonded together.

结合第一方面，在第一种实现方式下，所述弧形支架呈凸起的弧形状，或者呈凹陷的弧形状； In combination with the first aspect, in a first implementation manner, the curved bracket has a convex arc shape or a concave arc shape;

所述电芯体凹位呈凹陷的弧形，或者呈凸起的弧形。第二方面，本发明实施例提供的一种叠片锂离子电池，由上述任一制备方法得到。 The recess of the electric core body has a concave arc shape or a convex arc shape. In a second aspect, a laminated lithium ion battery according to an embodiment of the present invention is obtained by any of the above preparation methods.

第三方面，本发明实施例提供的一种弧形锂离子电池的铝塑膜封装的方法，其特征是，包括： In a third aspect, a method for packaging an aluminum plastic film of a curved lithium ion battery according to an embodiment of the present invention includes:

将弧形层叠电芯体置于所述铝塑膜壳体的电芯体凹位内，所述电芯体凹位的顶面的弧度与所述弧形层叠电芯体的弧度相匹配，使所述弧形层叠电芯体的底面与所述电芯体凹位的顶面面对面贴合， And placing an arc-shaped laminated electric core body in a recess of the electric core body of the aluminum plastic film casing, wherein a curvature of a top surface of the concave portion of the electric core body matches an arc of the arc-shaped laminated electric core body, Laying the bottom surface of the curved laminated core body face-to-face with the top surface of the concave portion of the electric core body,

将铝塑膜壳覆盖片过盈覆盖在所述弧形层叠电芯体的顶面，所述铝塑膜壳体覆盖片延伸在所述电芯体凹位的第一弧形端部； Depositing an aluminum plastic film cover sheet over the top surface of the curved laminated core body, the aluminum plastic film shell cover sheet extending at a first curved end of the recess of the electric core body;

采用水平面对面相对的第一上封部、第一下封部热封位于所述第一上封部、第一下封部之间的所述第二弧形端部的铝塑膜，使第二弧形端部处的所述铝塑膜壳体覆盖片与所述电芯体凹位外的铝塑膜热熔密封在一起，所述第二弧形端部为与所述第一弧形端部相对的端部； Sealing the aluminum film of the second curved end portion between the first upper sealing portion and the first lower sealing portion by using a first upper sealing portion and a first lower sealing portion that face each other in a horizontally facing manner The aluminum plastic film casing cover sheet at the end of the two arcs is heat-sealed together with the aluminum plastic film outside the concave portion of the electric core body, and the second curved end portion is opposite to the first arc An opposite end of the shaped end;

采用第二上封部、第二下封部热封位于所述第二上封部、第二下封部之间的第一弧形侧面，使所述第一弧形侧面处的所述铝塑膜壳体覆盖片与所述电芯体凹位外的铝塑膜热熔密封在一起，所述上封部的底部为第一曲面，所述下封部的顶部分别为第二曲面，所述第一曲面、第二曲面的可相互面对面紧贴配合，所述第一曲面、第二曲面的底部弧形分别与所述弧形层叠电芯体的顶部弧形相同。 Sealing the first curved side surface between the second upper sealing portion and the second lower sealing portion with the second upper sealing portion and the second lower sealing portion, so that the aluminum at the first curved side surface The plastic film casing cover sheet is heat-sealed together with the aluminum plastic film outside the concave portion of the electric core body, the bottom portion of the upper sealing portion is a first curved surface, and the top portion of the lower sealing portion is respectively a second curved surface. The first curved surface and the second curved surface are in close contact with each other, and the bottom curved shapes of the first curved surface and the second curved surface are respectively the same as the top curved shape of the curved laminated electrical core body.

结合第三方面，在第一种实现方式下，所述第一曲面向下部凸起；所述第二曲面向下部凹进； With reference to the third aspect, in a first implementation manner, the first curved surface is convex downward; the second curved surface is recessed downward;

所述弧形层叠电芯体的顶面向下凹进； The top surface of the curved laminated battery body is recessed downward;

结合第三方面，在第一种实现方式下，在步骤：采用第二上封部、第二下封部热封位于所述第二上封部、第二下封部之间的第一弧形侧面之后，还包括：以与所述第一弧形侧面相对的第二弧形侧面开口处为注液口，进行抽真空灌注电解液，使所述弧形层叠电芯体充盈浸泡在所述电解液中； With reference to the third aspect, in the first implementation, in the step of: heat sealing the first arc between the second upper sealing portion and the second lower sealing portion by using the second upper sealing portion and the second lower sealing portion After the shape of the side surface, the method further comprises: vacuuming the electrolyte solution with the second curved side opening opposite to the first curved side surface, and filling the curved laminated electric core body to be filled in the chamber In the electrolyte;

采用所述第二上封部、第二下封部热封位于所述第二上封部、第二下封部之间的第二弧形侧面外的边缘，形成气囊袋； Forming an airbag bag by using the second upper sealing portion and the second lower sealing portion to heat seal an outer edge of the second curved side surface between the second upper sealing portion and the second lower sealing portion;

化成；抽真空，采用第二上封部、第二下封部热封位于所述气囊袋内的所述第二弧形侧面，使所述第二弧形侧面处的所述铝塑膜壳体覆盖片与所述电芯体凹位外的铝塑膜热熔密封在一起，即得弧形铝塑膜叠片锂离子电池。 Turn into Vacuuming, using the second upper sealing portion and the second lower sealing portion to heat seal the second curved side surface in the airbag bag to cover the aluminum plastic film casing at the second curved side surface The sheet is hot-sealed with the aluminum plastic film outside the concave portion of the electric core body, that is, the curved aluminum-plastic film laminated lithium ion battery is obtained.

第四方面，本发明实施例提供的一种用于锂离子叠片体成型的装置，其特征是，包括： In a fourth aspect, an apparatus for forming a lithium ion laminated body according to an embodiment of the present invention includes:

弧形支架，所述弧形支架的顶面呈弧形； a curved bracket, the top surface of the curved bracket is curved;

弧形压制模具，所述弧形压制模具的底部形成有与所述弧形支架顶部弧形相匹配的第二弧形，当所述弧形压制模具覆盖在所述弧形支架顶部时，可与所述顶部支架的顶部面对面接触。 a curved pressing die, the bottom of the curved pressing die is formed with a second arc matching the arc shape of the curved bracket, when the curved pressing die covers the top of the curved bracket, Face to face contact with the top of the top bracket.

结合第四方面，在第一种实现方式下，所述弧形支架的顶面呈凸起的弧形，所述弧形压制模具的底面的所述第二弧形为向内凹进的弧形。 In conjunction with the fourth aspect, in a first implementation manner, a top surface of the curved bracket has a convex arc shape, and the second arc shape of the bottom surface of the arc pressing mold is an inwardly concave arc shape.

结合第四方面，在第一种实现方式下，所述弧形支架的顶面呈凹陷的弧形，所述弧形压制模具的底面的所述第二弧形为向下凸起的弧形。 With reference to the fourth aspect, in a first implementation manner, the top surface of the curved bracket has a concave arc shape, and the second arc shape of the bottom surface of the curved pressing mold is a downward convex curve .

第五方面，本发明实施例提供的一种铝塑膜壳体，其特征是，包括：在一铝塑膜上形成有电芯体凹位， In a fifth aspect, an aluminum plastic film casing provided by an embodiment of the invention includes: forming a concave portion of an electric core body on an aluminum plastic film,

所述电芯体凹位的顶面的呈弧形， The top surface of the concave portion of the electric core body is curved,

在所述电芯体凹位顶面外延伸的片状的铝塑膜壳体覆盖片， a sheet-like aluminum plastic film casing covering sheet extending outside the top surface of the concave portion of the core body,

所述铝塑膜壳体覆盖片可覆盖在所述电芯体凹位的顶部。 The aluminum plastic film casing cover sheet may cover the top of the recess of the electric core body.

结合第五方面，在第一种实现方式下，所述电芯体凹位的顶面的呈向上突起的所述弧形；或者，呈向下凹陷的所述弧形。 In conjunction with the fifth aspect, in the first implementation, the top surface of the concave portion of the electric core body has the arc shape that protrudes upward; or the arc shape that is recessed downward.

第六方面，本发明实施例提供的一种叠片锂离子电池，其特征是，包括：弧形层叠电芯体，所述弧形层叠电芯体由层叠的自然成型呈弧形的负极片、正极片构成，任一所述正极片、负极片之间分别间隔有一自然成型呈弧形的隔膜层， According to a sixth aspect, a laminated lithium ion battery according to an embodiment of the present invention includes: an arc-shaped laminated battery body, wherein the curved laminated battery body is formed by laminating a natural formed arc-shaped negative electrode piece. And a positive electrode sheet, wherein any one of the positive electrode sheet and the negative electrode sheet is separated by a naturally formed curved diaphragm layer.

铝塑膜壳体，在所述铝塑膜壳体上形成有电芯体凹位，所述弧形层叠电芯体限位在所述电芯体凹位内，被所述铝塑膜壳体密封。 An aluminum plastic film casing having a recessed body formed on the aluminum plastic film casing, wherein the curved laminated core body is limited to the recessed portion of the electric core body, and the aluminum plastic film shell is Body seal.

结合第六方面，在第一种实现方式下，各所述隔膜层分别与本所述隔膜层相邻的所述正极片、负极片相互粘结。 According to a sixth aspect, in the first implementation, each of the separator layers and the positive electrode sheets and the negative electrode sheets adjacent to the separator layer are bonded to each other.

结合第六方面，在第一种实现方式下，在各所述隔膜层的顶面以及底面分别涂布有聚偏氟乙烯层，各所述聚偏氟乙烯层分别与本聚偏氟乙烯层相邻的所述正极片、负极片相互粘结。 In combination with the sixth aspect, in the first implementation, the top surface and the bottom surface of each of the diaphragm layers are divided The polyvinylidene fluoride layer is coated, and the positive electrode sheet and the negative electrode sheet adjacent to the polyvinylidene fluoride layer of each of the polyvinylidene fluoride layers are bonded to each other.

结合第六方面，在第一种实现方式下，沿所述弧形层叠电芯体的弧形由内到外方向，所述正极片、负极片的自然长度由短到长变化。 In combination with the sixth aspect, in the first implementation, the arc shape of the arc-shaped laminated battery body varies from the inside to the outside, and the natural length of the positive electrode tab and the negative electrode tab changes from short to long.

结合第六方面，在第一种实现方式下，各所述正极片分别限位于各隔膜袋中， In combination with the sixth aspect, in the first implementation manner, each of the positive electrode sheets is respectively limited to each of the diaphragm pockets.

所述隔膜袋包括：第一隔膜、第二隔膜， The diaphragm bag includes: a first diaphragm, a second diaphragm,

第一隔膜、第二隔膜分别正对位于各所述正极片的顶面、底面。 The first diaphragm and the second diaphragm are respectively located on the top surface and the bottom surface of each of the positive electrode sheets.

结合第六方面，在第一种实现方式下，各所述正极片分别限位于各隔膜袋中，具体是： In combination with the sixth aspect, in the first implementation manner, each of the positive electrode sheets is respectively limited to each of the diaphragm pockets, specifically:

在所述第一隔膜、第二隔膜的至少两纵向边缘上分别形成不相连续的至少两个热封封口，所述第一隔膜、第二隔膜在各所述热封封口处热熔连接。 At least two heat seals which are not continuous are respectively formed on at least two longitudinal edges of the first diaphragm and the second diaphragm, and the first diaphragm and the second diaphragm are thermally welded at each of the heat seals.

结合第六方面，在第一种实现方式下，在所述第一隔膜、第二隔膜的四周边缘上分别形成所述热封封口。 In conjunction with the sixth aspect, in a first implementation, the heat seal seal is formed on each of the peripheral edges of the first diaphragm and the second diaphragm.

第一隔膜、第二隔膜分别正对位于各所述正极片的顶面、底面； The first diaphragm and the second diaphragm are respectively located on the top surface and the bottom surface of each of the positive electrode sheets;

在所述第一隔膜、第二隔膜的至少一宽度端部上分别形成热封封口，所述第一隔膜、第二隔膜在所述热封封口处热熔连接。 Heat sealing seals are respectively formed on at least one width end of the first diaphragm and the second diaphragm, and the first diaphragm and the second diaphragm are thermally welded at the heat seal.

结合第六方面，在第一种实现方式下，在所述宽度端部上形成不相互连续的至少两个所述封口，或者， In conjunction with the sixth aspect, in the first implementation, at least two of the seals that are not continuous with each other are formed on the width ends, or

在所述宽度端部上形成连续的所述热封封口；或者， Forming the continuous heat seal on the width end; or

在所述第一隔膜、第二隔膜的第一宽度端部上形成所述热封封口，所述正极片的极耳焊接部在所述第 -宽度端部伸出。 The heat seal is formed on a first width end of the first diaphragm and the second diaphragm, and a tab weld of the positive pole piece protrudes at the first width end.

结合第六方面，在第一种实现方式下，各所述正极片分别位于各隔膜袋中，各所述正极片分别限位于各隔膜袋中，具体是： In combination with the sixth aspect, in the first implementation manner, each of the positive electrode sheets is located in each of the diaphragm pockets, and each of the positive electrode sheets is respectively disposed in each of the diaphragm pockets, specifically:

在所述第一隔膜、第二隔膜的四个顶角的至少任意两个上分别形成有热封封口，所述第一隔膜、第二隔膜在所述热封封口处热熔连接。 Heat sealing seals are respectively formed on at least any two of the four apex angles of the first diaphragm and the second diaphragm, and the first diaphragm and the second diaphragm are thermally fused at the heat seal.

结合第六方面，在第一种实现方式下，在所述第一隔膜、第二隔膜的四个顶角上分别形成有所述热封封口。 In conjunction with the sixth aspect, in the first implementation, four of the first diaphragm and the second diaphragm The heat seal seals are respectively formed on the top corners.

第一隔膜、第二隔膜分别正对位于各所述正极片的顶面、底面；所述第一隔膜、第二隔膜分别与所述正极片面对面粘合在一起。 The first diaphragm and the second diaphragm are respectively located on the top surface and the bottom surface of each of the positive electrode sheets; and the first diaphragm and the second diaphragm are respectively bonded to the front surface of the positive electrode sheet.

第一隔膜、第二隔膜分别正对位于各所述正极片的顶面、底面；所述第一隔膜、第二隔膜超出所述正极片的边缘激光点焊连接在一起。第七方面，本发明实施例提供的一种用于铝塑膜封装模具，包括上封部、下封部， The first diaphragm and the second diaphragm are respectively located on the top surface and the bottom surface of each of the positive electrode sheets; and the first diaphragm and the second diaphragm are laser spot welded together beyond the edge of the positive electrode sheet. According to a seventh aspect, an aluminum plastic film packaging mold provided by an embodiment of the present invention includes an upper sealing portion and a lower sealing portion.

所述上封部的底部为第一曲面，所述下封部的顶部分别为第二曲面，所述第一曲面、第二曲面可相互面对面紧贴配合。 The bottom of the upper sealing portion is a first curved surface, and the top portion of the lower sealing portion is respectively a second curved surface, and the first curved surface and the second curved surface are closely matched to each other.

结合第七方面，在第一种实现方式下，所述第一曲面向下凸起，所述第二曲面向下凹进； With reference to the seventh aspect, in a first implementation manner, the first curved surface is convex downward, and the second curved surface is recessed downward;

或者， Or,

所述第一曲面向上凹进，所述第二曲面向上凸起。 The first curved surface is recessed upward, and the second curved surface is upwardly convex.

由上可见，应用本实施例技术方案，由于本实施例在得到锂离子电池层叠电芯体后，通过将叠片体中部固定，让叠片体自然搁置于弧形支架的顶部自然成型后在该弧形上进行弧形热压成型定型，然后装配进铝塑膜壳体的弧形电芯体凹位，然后进行铝塑膜封装得到。 As can be seen from the above, the technical solution of the embodiment is applied. Since the lithium ion battery laminated core body is obtained in this embodiment, the laminated body is naturally placed on the top of the curved support by natural fixing after the middle of the laminated body is fixed. The arc is formed by arc-shaped hot press forming, and then assembled into a concave shape of the arc-shaped electric core body of the aluminum-plastic film casing, and then obtained by aluminum-plastic film encapsulation.

相对于现有技术的以下技术方案：先按照现有技术制备顶面以及底面均为平直状的铝塑膜锂离子电池成品后，对该平直状的铝塑膜锂离子电池进行弯曲压制定型，在弯曲压制过程中，限位于铝塑膜固定空间内的锂离子电池内的极片以及隔膜发生皱折或者拉伸形变，容易导致电池极片的结构受损，降低电池的电化学性能，并且，在弯曲压制过程中铝塑膜壳体的各处也发生皱折或者被拉伸的形变，导致外观不良品的产生。 Compared with the prior art, the following technical solutions: firstly, according to the prior art, a flat aluminum-plastic film lithium ion battery with a top surface and a flat bottom surface is prepared, and the flat aluminum plastic film lithium ion battery is bent and pressed. Stereotype, during the bending and pressing process, the pole piece and the diaphragm in the lithium ion battery in the fixed space of the aluminum plastic film are wrinkled or stretched, which easily causes damage to the structure of the battery pole piece and reduces the electrochemical performance of the battery. Moreover, wrinkles or stretched deformations occur in the aluminum plastic film casing throughout the bending and pressing process, resulting in the appearance of defective products.

综上，应用本实施例技术方案，由于本实施例弧形锂离子电池内的各极片、隔膜以及铝塑膜壳体均处于自然状态而不通过形变拉伸成型，有利于确保锂离子电池的电化学性能的稳定性以及安全性，有利于降低产品的不良率。附图说明 In summary, according to the technical solution of the embodiment, since the pole pieces, the diaphragm and the aluminum plastic film casing in the curved lithium ion battery are in a natural state and are not formed by deformation deformation, it is beneficial to ensure lithium separation. The stability and safety of the electrochemical performance of the sub-battery are beneficial to reduce the defect rate of the product. DRAWINGS

此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，并不构成对本发明的不当限定，在附图中： The drawings described herein are provided to provide a further understanding of the invention and constitute a part of this application and are not to be construed as limiting

图 1为本发明实施例 1提供的叠片锂离子电池的制备工艺流程示意图；图 2为本发明实施例 1提供的正极片隔膜袋制备方案一流程示意图；图 3为本发明实施例 1提供的正极片隔膜袋制备方案二流程示意图；图 4为本发明实施例 1提供的正极片隔膜袋制备方案三流程示意图；图 5为本发明实施例 1提供的正极片隔膜袋制备方案一流程制得的正极片隔膜袋结构示意图； 1 is a schematic flow chart of a process for preparing a laminated lithium ion battery according to Embodiment 1 of the present invention; FIG. 2 is a schematic flow chart of a preparation method of a positive electrode film separator bag according to Embodiment 1 of the present invention; FIG. 3 is a schematic diagram of Embodiment 1 of the present invention; FIG. 4 is a schematic diagram of a third flow chart of a preparation method of a positive electrode sheet separator bag according to Embodiment 1 of the present invention; FIG. 5 is a flow chart of a preparation method of a positive electrode sheet separator bag according to Embodiment 1 of the present invention; A schematic diagram of the structure of the positive electrode separator bag obtained;

图 6为本发明实施例 1提供的正极片隔膜袋制备方案二流程制得的正极片隔膜袋结构示意图； 6 is a schematic structural view of a separator bag of a positive electrode sheet prepared by the second embodiment of the preparation method of the positive electrode sheet separator bag according to the first embodiment of the present invention;

图 7为本发明实施例 1提供的正极片隔膜袋制备方案三流程制得的正极片隔膜袋结构示意图； 7 is a schematic structural view of a separator bag of a positive electrode sheet prepared by the third process of preparing a positive electrode sheet separator bag according to Embodiment 1 of the present invention;

图 8为本发明实施例 1、 2提供将层叠电芯体自然搁置于用于锂离子叠片体成型的装置的结构示意图； 8 is a schematic structural view of an apparatus for naturally laminating a laminated core body for forming a lithium ion laminated body according to Embodiments 1 and 2 of the present invention;

图 9为本发明实施例 1提供另一种用于锂离子叠片体成型的装置的结构示意图； FIG. 9 is a schematic view showing the structure of another apparatus for forming a lithium ion laminated body according to Embodiment 1 of the present invention; FIG.

图 10为本发明实施例 1提供的一种铝塑膜壳体结构示意图； 10 is a schematic structural view of an aluminum plastic film casing according to Embodiment 1 of the present invention;

图 11为本发明实施例 1提供的另一种铝塑膜壳体结构示意图； 11 is a schematic structural view of another aluminum plastic film casing according to Embodiment 1 of the present invention;

图 12为本发明实施例 1、 2提供的弧形的铝塑膜叠片锂离子电池（注液口所在边未热封）结构示意图； 12 is a schematic structural view of a curved aluminum-plastic film laminated lithium ion battery according to Embodiments 1 and 2 of the present invention (the side of the liquid injection port is not heat sealed);

图 13为本发明实施例 1、2提供的铝塑膜弧形叠片锂离子电池结构示意图；图 ₁₄为本发明实施例 1、 2中提供的弧形层叠电芯体结构示意图；图 15为本发明实施例 1、 2中提供的铝塑膜壳体弯曲侧封模具的主视结构示意图； 13 is a schematic structural view of an aluminum-plastic film curved laminated lithium ion battery according to Embodiments 1 and 2 of the present invention; FIG. ₁₄ is a schematic structural view of a curved laminated battery core provided in Embodiments 1 and 2 of the present invention; A front view of a curved side seal mold of an aluminum plastic film casing provided in Embodiments 1 and 2 of the present invention;

图 16本发明实施例 1、 2中提供的铝塑膜壳体弯曲侧封模具的侧面结构示意图； Figure 16 is a side view showing the structure of a curved side sealing mold of an aluminum plastic film casing provided in Embodiments 1 and 2 of the present invention;

图 17发明实施例 1、 2中提供的铝塑膜壳体弯曲侧封模具的俯视示意图；图 18发明实施例 1、 2中提供的铝塑膜壳体塑封的流程结构示意图附图标记： Figure 17 is a top plan view showing the curved side sealing mold of the aluminum plastic film casing provided in the first and second embodiments; Figure 18 is a schematic view showing the flow structure of the aluminum-plastic film casing plastic package provided in the first and second embodiments of the invention.

500：正极片； 501 第一纵向边缘； 502：第二纵向边缘； 601：第一宽度边缘； 602 第二宽度边缘； 5001：极耳焊接部； 801：层叠电芯体； 802 弧形支架； 803：弧形压制模具； 500: positive electrode sheet; 501 first longitudinal edge; 502: second longitudinal edge; 601: first width edge; 602 second width edge; 5001: tab weld; 801: laminated core body; 802 curved bracket; 803: curved pressing mold;

902：弧形支架； 903 弧形压制模具； 1001：铝塑膜壳体覆盖片； 1002：电芯体凹位； 1102：电芯体凹位； 1301：负极片；902: curved bracket; 903 curved pressing mold; 1001: aluminum plastic film casing cover sheet; 1002: electric core concave position; 1102: electric core concave position; 1301: negative electrode sheet;

1201：顶端； 1401 ：热封模具的上封部； 1201: top; 1401: heat sealing the upper seal portion of the mold;

1402：热封模具的第二下封部。具体实施方式下面将结合附图以及具体实施例来详细说明本发明，在此本发明的示意性实施例以及说明用来解释本发明，但并不作为对本发明的限定。 1402: Heat sealing the second lower seal of the mold. The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

实施例 1： Example 1:

参见图 1-18所示，本实施例提供了一种叠片锂离子电池的制备工艺，该工艺主要包括以下的步骤： Referring to Figures 1-18, the present embodiment provides a process for preparing a laminated lithium ion battery, the process comprising the following steps:

步骤 101：叠片得到叠片体。 Step 101: The laminate obtains a laminate.

在本步骤中，层叠负极片 1301、正极片 500得到层叠电芯体 801。在该得到的层叠电芯体 801内任一层正极片 500、负极片 1301之间分别间隔有一隔膜层。 In this step, the negative electrode tab 1301 and the positive electrode tab 500 are laminated to obtain a laminated battery body 801. A separator layer is interposed between each of the positive electrode sheets 500 and the negative electrode sheets 1301 in the obtained laminated battery body 801.

在本步骤中可以按照现有技术实现中采用单片正极片 500、隔膜片、负极片 1301层叠工艺实现。 In this step, a single-layer positive electrode sheet 500, a separator sheet, and a negative electrode sheet 1301 can be used in the prior art implementation.

作为本步骤的实施示意，本发明人提供了以下的叠片技术方案：将正极片 500入隔膜袋得到正极片隔膜袋，使在每个正极片隔膜袋中分别置入有一正极片 500 ,使在该正极片 500的顶面、以及底面的活性涂料层均覆盖有隔膜层。在制的各正极袋后，分别将各负极片 1301与各正极袋相互层叠即可。 As an implementation of this step, the inventors have provided the following lamination technical solution: The positive electrode sheet 500 is inserted into a separator bag to obtain a positive electrode sheet separator bag, and a positive electrode sheet 500 is placed in each of the positive electrode sheet separator bags, so that The top surface of the positive electrode sheet 500 and the active paint layer on the bottom surface are covered with a separator layer. After each of the prepared positive electrode pouches, each of the negative electrode tabs 1301 and each of the positive electrode pouches may be laminated on each other.

其中正极片隔膜袋的制造可以按照现有技术实现，即在三面均封闭的隔膜袋中装入正极片 500 ,使正极片 500的极耳焊接部 5001从正极片隔膜袋的宽度端部伸出。作为本步骤的实施示意，本发明人还提供了以下的正极片隔膜袋的制备技术方案： The positive electrode sheet separator bag can be manufactured according to the prior art, that is, the positive electrode sheet 500 is inserted into the diaphragm bag which is closed on three sides, so that the tab welding portion 5001 of the positive electrode sheet 500 protrudes from the width end portion of the positive electrode sheet separator bag. . As an implementation of this step, the inventors have also provided the following technical solutions for preparing a positive electrode sheet separator bag:

正极片隔膜袋制备方案一：分别按照以下入袋工艺将各正极片 500装入各隔膜袋，得到各所述正极片隔膜袋，参见图 2、 5所示，入袋工艺如下： Positive electrode sheet separator bag preparation scheme 1: Each positive electrode sheet 500 is loaded into each separator bag according to the following bagging process, and each of the positive electrode sheet separator bags is obtained, as shown in Fig. 2 and Fig. 5, the bagging process is as follows:

步骤 201：在每正极片 500的顶面、底面分别放置第一隔膜、第二隔膜。使该正极片 500的活性成分涂布区被第一隔膜、第二隔膜上下正对覆盖，极耳焊接部 5001从第一隔膜、第二隔膜的第一宽度端部伸出。 Step 201: A first diaphragm and a second diaphragm are respectively placed on the top surface and the bottom surface of each positive electrode sheet 500. The active component coating region of the positive electrode sheet 500 is covered by the first separator and the second separator in a vertical direction, and the tab welded portion 5001 protrudes from the first width end portion of the first separator and the second separator.

步骤 202：热封第一隔膜、第二隔膜的至少两纵向边缘，在两纵向边缘上分别形成多个不相连续的热封封口。 Step 202: heat sealing at least two longitudinal edges of the first diaphragm and the second diaphragm, and forming a plurality of non-contiguous heat seal seals on the two longitudinal edges.

第一隔膜、第二隔膜在各热封封口处热熔连接，即得正极片隔膜袋。 The first membrane and the second membrane are thermally fused at each heat seal, that is, a positive membrane separator bag is obtained.

在本步骤中，可以仅在第一隔膜、第二隔膜的第一纵向边缘 501、第二纵向边缘 502上进行间隔热封形成不相连接的热封口； In this step, the heat seals may be formed on the first longitudinal edge 501 of the first diaphragm, the second diaphragm, and the second longitudinal edge 502 to form a heat seal that is not connected;

在本步骤中，也可以在第一隔膜、第二隔膜的第一纵向边缘 501、第二纵向边缘 502、第一宽度边缘 601上分别进行间隔热封形成不相连接的热封口；在本步骤中，还可以在第一隔膜、第二隔膜的第一纵向边缘 501、第二纵向边缘 502、第一宽度边缘 601、第二宽度边缘 602上均进行间隔热封形成不相连接的热封口。 In this step, the first longitudinal edge 501, the second longitudinal edge 502, and the first width edge 601 of the first diaphragm, the second diaphragm may be separately heat-sealed to form a heat seal that is not connected; Further, the first longitudinal edge 501, the second longitudinal edge 502, the first width edge 601, and the second width edge 602 of the first diaphragm, the second diaphragm may be heat-sealed to form a non-connecting heat seal.

相对于现有技术，采用方案一所示的正极片 500入袋工艺，一方面，实现了对隔膜袋中的正极片 500的定位，避免正极片 500移位而导致锂离子电池电性能不佳甚至短路、引发安全隐患的问题；另一方面，本正极片隔膜袋制备方案一由于在隔膜袋封装采用不连续的间隔热封，使在隔膜袋的四周形成有对外连通的开口，这样在注液时，液体能更好地通过隔膜袋浸入正极片 500 ,相对于现有技术有利于提高叠片锂离子电池的容量以及电性能。 Compared with the prior art, the positive electrode sheet 500 shown in the first embodiment is used in the bagging process. On the one hand, the positioning of the positive electrode sheet 500 in the diaphragm bag is realized, and the displacement of the positive electrode sheet 500 is avoided, resulting in poor electrical performance of the lithium ion battery. Even short circuit, causing safety hazards; on the other hand, the positive electrode diaphragm bag preparation scheme 1 uses a discontinuous interval heat sealing in the diaphragm bag package, so that an externally connected opening is formed around the diaphragm bag, so that the injection is made In the case of liquid, the liquid can be better immersed in the positive electrode sheet 500 through the separator bag, which is advantageous in improving the capacity and electrical properties of the laminated lithium ion battery compared to the prior art.

正极片隔膜袋制备方案二：分别按照以下入袋工艺将各正极片 500装入各隔膜袋，得到各所述正极片隔膜袋，参见图 3、 6所示，入袋工艺如下： Positive electrode sheet separator bag preparation scheme 2: Each positive electrode sheet 500 is placed in each separator bag according to the following bagging process, and each of the positive electrode sheet separator bags is obtained. Referring to Figs. 3 and 6, the bagging process is as follows:

步骤 301：在每正极片 500的顶面、底面分别放置第一隔膜、第二隔膜。使该正极片 500的活性成分涂布区被第一隔膜、第二隔膜上下正对覆盖，极耳焊接部 5001从第一隔膜、第二隔膜的第一宽度端部伸出。 Step 301: placing a first diaphragm and a second diaphragm on each of the top surface and the bottom surface of each positive electrode sheet 500. The active component coating region of the positive electrode sheet 500 is covered by the first separator and the second separator in a vertical direction, and the tab welded portion 5001 protrudes from the first width end portion of the first separator and the second separator.

步骤 302：热封第一隔膜、第二隔膜的至少一宽度端部。在本步骤中，热封第一隔膜、第二隔膜的至少一宽度端部，在被热封的宽度端部上形成有热封封口，第一隔膜、第二隔膜在热封封口处热熔连接，即得正极片隔膜袋。 Step 302: Heat sealing at least one width end of the first diaphragm and the second diaphragm. In this step, at least one width end of the first diaphragm and the second diaphragm are heat-sealed, and a heat seal is formed on the heat-sealed width end, and the first diaphragm and the second diaphragm are thermally melted at the heat seal. Connected, that is, the positive film separator bag.

在本步骤中，可以采用上述的不连续间隔热封的技术方案，也可以采用连续热封的技术方案。 In this step, the above-mentioned discontinuous interval heat sealing technical solution or the continuous heat sealing technical solution may be employed.

在本步骤中，可以仅在第一隔膜、第二隔膜的极耳焊接位伸出的第一宽度端部进行热封，还可以但不限于在仅在极耳焊接位对端的第二宽度端部进行热封，还可以但不限于在两宽度端部均进行热封。 In this step, the first width end of the first diaphragm and the second diaphragm may be heat-sealed only at the first width end, and may be, but not limited to, the second width end of the opposite end of the tab welding only. The heat sealing can also be performed by heat sealing at both ends of the width.

相对于现有技术，采用本正极片隔膜袋制备方案二所示的正极片 500入袋工艺，一方面，实现了对隔膜袋中的正极片 500的定位，避免正极片 500移位而导致锂离子电池电性能不佳甚至短路、引发安全隐患的问题；另一方面，本正极片隔膜袋制备方案二由于在隔膜袋封装在隔膜的两宽度端部的任一或者两宽度端部进行热封，使在隔膜袋的至少两纵向边缘全部对外连通，这样在注液时，液体能更好地通过隔膜袋浸入正极片 500 ,相对于现有技术有利于提高大大锂离子电池的容量以及电性能。 Compared with the prior art, the positive electrode sheet 500 shown in the second positive electrode sheet separator bag preparation process is used. On the one hand, the positioning of the positive electrode sheet 500 in the diaphragm bag is realized, and the displacement of the positive electrode sheet 500 is avoided to cause lithium. The ion battery has poor electrical performance or even short circuit, causing safety hazards; on the other hand, the positive electrode diaphragm bag preparation scheme 2 is heat-sealed by sealing the diaphragm bag at either or both width ends of the two width ends of the diaphragm. Therefore, at least two longitudinal edges of the diaphragm bag are all externally connected, so that liquid can be better immersed into the positive electrode sheet 500 through the diaphragm bag during liquid injection, which is advantageous for improving the capacity and electrical performance of the large lithium ion battery compared with the prior art. .

正极片隔膜袋制备方案三：分别按照以下入袋工艺将各正极片 500装入各隔膜袋，得到各所述正极片隔膜袋，参见图 4、 7所示，入袋工艺如下： Positive electrode sheet separator bag preparation scheme 3: Each positive electrode sheet 500 is respectively loaded into each separator bag according to the following bagging process to obtain each of the positive electrode sheet separator bags, as shown in Figs. 4 and 7, the bagging process is as follows:

步骤 401：在每正极片 500的顶面、底面分别放置第一隔膜、第二隔膜。使该正极片 500的活性成分涂布区被第一隔膜、第二隔膜上下正对覆盖，极耳焊接部 5001从第一隔膜、第二隔膜的第一宽度端部伸出。 Step 401: placing a first diaphragm and a second diaphragm on each of the top surface and the bottom surface of each positive electrode sheet 500. The active component coating region of the positive electrode sheet 500 is covered by the first separator and the second separator in a vertical direction, and the tab welded portion 5001 protrudes from the first width end portion of the first separator and the second separator.

步骤 402：热封第一隔膜、第二隔膜的四个顶角的至少任意两个，形成热封封口。 Step 402: Heat sealing at least any two of the four apex angles of the first diaphragm and the second diaphragm to form a heat seal.

在本步骤中，第一隔膜、第二隔膜在热封封口处热熔连接，即得正极片隔在本步骤中，可以仅在第一隔膜、第二隔膜的第一顶角、第二顶角、第三顶角、第四顶角的任意两个顶角、任三个顶角、或者四个顶角进行热封，本发明人在进行本发明研究过程中发现，仅在两顶角热封时，采用对角顶角热封的工艺有利于更好地对正极片 500进行定位；采用四顶角热封，能够实现对正极片 500的完全定位，避免任一方向的移位。相对于现有技术，采用本正极片隔膜袋制备方案二所示的正极片 500入袋工艺，一方面，实现了对隔膜袋中的正极片 500的定位，避免正极片 500移位而导致锂离子电池电性能不佳甚至短路、引发安全隐患的问题；另一方面，本正极片隔膜袋制备方案三由于在隔膜袋封装在隔膜的四个顶角的至少两个进行热封，使在隔膜袋的四个边缘全部对外连通，这样在注液时，液体能更好地通过隔膜袋浸入正极片 500 ,相对于现有技术有利于提高大大锂离子电池的容量以及电性能。正极片隔膜袋制备方案四：分别按照以下入袋工艺将各正极片 500装入各隔膜袋，得到各所述正极片隔膜袋，入袋工艺如下： In this step, the first diaphragm and the second diaphragm are thermally fused at the heat seal, that is, the positive electrode sheet is separated in the step, and may be only at the first apex angle and the second top of the first diaphragm and the second diaphragm. Any two apex angles, any three apex angles, or four apex angles of the corners, the third apex angle, the fourth apex angle, or the four apex angles are heat-sealed, and the inventors found that only at the two apex angles during the research of the present invention In the heat sealing, the process of heat sealing with a diagonal apex angle is advantageous for better positioning of the positive electrode sheet 500; the four-corner heat sealing can achieve complete positioning of the positive electrode sheet 500 and avoid displacement in either direction. Compared with the prior art, the positive electrode sheet 500 shown in the second positive electrode sheet separator bag preparation process is used. On the one hand, the positioning of the positive electrode sheet 500 in the diaphragm bag is realized, and the displacement of the positive electrode sheet 500 is avoided to cause lithium. Ion battery has poor electrical performance or even short circuit, causing safety hazard; on the other hand, the positive electrode diaphragm bag preparation scheme III is heat-sealed due to at least two of the four apex angles of the diaphragm bag encapsulating the diaphragm, so that the diaphragm The four edges of the bag are all externally connected, so that the liquid can be better immersed into the positive electrode sheet 500 through the separator bag during liquid injection, which is advantageous for improving the capacity and electrical properties of the large lithium ion battery compared with the prior art. Positive electrode sheet separator bag preparation scheme 4: Each positive electrode sheet 500 is loaded into each separator bag according to the following bagging process, and each of the positive electrode sheet separator bags is obtained, and the bagging process is as follows:

步骤 1：在正极片 500的顶面、底面分别放置第一隔膜、第二隔膜。 Step 1: The first diaphragm and the second diaphragm are placed on the top surface and the bottom surface of the positive electrode sheet 500, respectively.

使该正极片 500的活性成分涂布区被第一隔膜、第二隔膜上下正对覆盖，极耳焊接部 5001从第一隔膜、第二隔膜的第一宽度端部伸出。 The active component coating region of the positive electrode sheet 500 is covered by the first separator and the second separator in a vertical direction, and the tab welded portion 5001 protrudes from the first width end portion of the first separator and the second separator.

其中，使隔膜的四周比正极片超出 1-2毫米左右。 Among them, the circumference of the diaphragm is more than 1-2 mm than the positive electrode sheet.

步骤 2：面对面热封第一隔膜、第二隔膜以及极片，使第一隔膜、第二隔膜分别粘合在正极片的顶面以及底面。 Step 2: heat-treating the first separator, the second separator and the pole piece face to face so that the first membrane and the second membrane are respectively adhered to the top surface and the bottom surface of the positive electrode sheet.

在本步骤中，可以但不限于在第一隔膜、第二隔膜的表面涂布聚偏氟乙烯层，使在确定压力以及温度的热压下，第一隔膜、第二隔膜分别通过其表面半熔的聚偏氟乙烯层与正极片粘合在一起。 In this step, the polyvinylidene fluoride layer may be coated on the surface of the first separator and the second membrane so that the first membrane and the second membrane pass through the surface half thereof under heat pressure for determining pressure and temperature. The molten polyvinylidene fluoride layer is bonded to the positive electrode sheet.

在本实施例中，既可以单片正极片分别按照上述方案入袋。也可以在大片正极片的底面以及顶面覆盖大片的第一隔膜、第二隔膜，然后对层叠的第一隔膜、正极片、第二隔膜施加确定的温度以及压力，使其相互粘合在一起，然后进行裁片得到小片的单个正极片袋。 In this embodiment, a single positive electrode sheet can be individually bagged according to the above scheme. It is also possible to cover the large first film and the second film on the bottom surface and the top surface of the large positive electrode sheet, and then apply a certain temperature and pressure to the laminated first, positive and second separators to bond them to each other. Then, the piece is cut to obtain a single positive piece pocket of the small piece.

采用该技术方案能够大大提高生产效率,且有利于提高各隔膜袋中的正极片的面积而有利于提高电池的容量，且实现了对隔膜袋中的正极片 500 的定位，避免正极片 500移位而导致锂离子电池电性能不佳甚至短路、引发安全隐患的问题。 The technical solution can greatly improve the production efficiency, and is beneficial to increase the area of the positive electrode sheet in each diaphragm bag, thereby improving the capacity of the battery, and realizing the positioning of the positive electrode sheet 500 in the diaphragm bag, and avoiding the movement of the positive electrode sheet 500. The lithium ion battery has poor electrical performance or even short circuit, causing safety hazards.

正极片隔膜袋制备方案五：分别按照以下入袋工艺将各正极片 500装入各隔膜袋，得到各所述正极片隔膜袋，入袋工艺如下：步骤 Γ：在正极片 500的顶面、底面分别放置第一隔膜、第二隔膜。 Positive electrode sheet separator bag preparation scheme 5: Each positive electrode sheet 500 is respectively loaded into each separator bag according to the following bagging process, and each of the positive electrode sheet separator bags is obtained, and the bagging process is as follows: Step Γ: The first diaphragm and the second diaphragm are placed on the top surface and the bottom surface of the positive electrode sheet 500, respectively.

步骤 2'：在第一隔膜、第二隔膜超出正极片外的边缘，按照预定的点焊轨迹激光点焊热封第一隔膜、第二隔膜，使第一隔膜、第二隔膜分别连接在一起，从而将正极片限位在该第一隔膜、第二隔膜之间。 Step 2': in the first diaphragm and the second diaphragm beyond the outer edge of the positive electrode sheet, the first diaphragm and the second diaphragm are heat-sealed according to a predetermined spot welding trajectory, so that the first diaphragm and the second diaphragm are respectively connected together. Thereby, the positive electrode sheet is restrained between the first diaphragm and the second diaphragm.

在本步骤中，采用激光点焊对第一隔膜、第二隔膜进行连接的技术方案，由于激光点焊可以使其点焊连接点小且精确，有利于提高隔膜袋中的正极片的体积，有利于提高电池的容量，且采用该技术方案能够大大提高生产效率，且实现了对隔膜袋中的正极片 500的定位，避免正极片 500移位而导致锂离子电池电性能不佳甚至短路、引发安全隐患的问题。 In this step, the technical solution of connecting the first diaphragm and the second diaphragm by laser spot welding is that the spot welding connection point of the laser spot welding can be small and accurate, which is advantageous for increasing the volume of the positive electrode sheet in the diaphragm bag. It is beneficial to increase the capacity of the battery, and the technical solution can greatly improve the production efficiency, and realize the positioning of the positive electrode sheet 500 in the diaphragm bag, and avoid the displacement of the positive electrode sheet 500, resulting in poor electrical performance or even short circuit of the lithium ion battery. A problem that raises security risks.

需要说明的是，上述的各正极片隔膜袋制备方案不仅适用于方形正极片的入袋，还可以适用于圆形、梯形、三角形、" S"形等各种可能的形状。 It should be noted that the above-mentioned preparation method of each positive electrode sheet separator bag is not only applicable to the bag of the square positive electrode sheet, but also applicable to various possible shapes such as a circular shape, a trapezoidal shape, a triangular shape, and an "S" shape.

步骤 102：固定层叠电芯体 801中部。 Step 102: Fix the middle of the laminated core body 801.

在步骤 101得到层叠电芯体 801后，可以但不限于通过胶纸粘贴的方式固定层叠电芯体 801的中部，使层叠电芯体 801的两端部可自然下垂或者在收到其他向上力的作用下自然向上卷起。 After the laminated core body 801 is obtained in step 101, the middle portion of the laminated core body 801 may be fixed by means of adhesive tape bonding, so that both ends of the laminated core body 801 can naturally sag or receive other upward force. Naturally rolled up under the influence of it.

步骤 103：弧形热压层叠电芯体 801。 Step 103: Arc-shaped hot-press laminated battery body 801.

参见图 8所示，将中部固定的层叠电芯体 801自然搁置于用于锂离子叠片体成型的装置的弧形支架 802的顶部，层叠电芯体 801由于重力的作用，自然紧贴覆盖在弧形支架 802的顶部形成与顶部弧形相同的弧形。 Referring to FIG. 8, the centrally fixed laminated core body 801 is naturally placed on top of the curved bracket 802 for the apparatus for forming a lithium ion laminated body, and the laminated core body 801 is naturally closely covered by the action of gravity. An arc having the same shape as the top arc is formed on the top of the curved bracket 802.

启动位于弧形支架 802上方的弧形压制模具 803 ,使该弧形压制模具 803 具备预定的温度、以预定的压力对位于弧形支架 802顶部的叠片体进行压制，弧形压制模具 803的底部形成有与弧形支架 802顶部弧形相匹配的第二弧形，当弧形压制模具 803覆盖在弧形支架 802顶部时，可与弧形支架 802顶部面对面接触。当在对层叠电芯体 801进行压制时，弧形压制模具 803与位于弧形支架 802顶部的层叠电芯体 801面对面接触，均匀给予层叠电芯体 801表面一定的压力以及温度，在热压的作用下，层叠电芯体 801内各隔膜层分别与该隔膜层相邻的正极片 500、负极片 1301相互粘结在一起，即整个层叠电芯体 801通过各隔膜层的粘结而相互粘结成一整体。 The arc-shaped pressing die 803 located above the curved bracket 802 is activated, and the arc-shaped pressing die 803 is provided with a predetermined temperature to press the laminated body on the top of the curved bracket 802 with a predetermined pressure, and the curved pressing die 803 is pressed. The bottom portion is formed with a second arc that matches the top arc of the curved bracket 802. When the curved pressing mold 803 covers the top of the curved bracket 802, it can be in face-to-face contact with the top of the curved bracket 802. When the laminated core body 801 is pressed, the curved pressing die 803 is in face-to-face contact with the laminated core body 801 located at the top of the curved bracket 802, uniformly giving a certain pressure and temperature to the surface of the laminated core body 801, in hot pressing The diaphragm layers in the laminated core body 801 are respectively The positive electrode sheet 500 and the negative electrode sheet 1301 adjacent to each other of the separator layer are bonded to each other, that is, the entire laminated battery core body 801 is bonded to each other by the bonding of the respective diaphragm layers.

在本实施例中可以在隔膜层或者正极片 500或者负极片 1301表面涂覆各种可在高温时相互粘结的材料而实现隔膜层与其相邻的正极片 500、负极片 1301的粘结。 In the present embodiment, the separator layer or the positive electrode sheet 500 or the negative electrode sheet 1301 may be coated with a material which can be bonded to each other at a high temperature to bond the separator layer to the adjacent positive electrode sheet 500 and negative electrode sheet 1301.

作为本实施例的示意之一，本发明人提供了在各隔膜袋的各隔膜层的顶面以及底面分别涂覆聚偏氟乙烯材料（ Polyvinylidene Fluoride ,简称 PVDF ) ,使在各隔膜层顶面以及底面均形成有 PVDF层，在进行热压时，使热压温度达到预定的温度，使在弧形压制模具 803的压力以及温度下，各隔膜层的各 PVDF 层在受热下软化（软化温度为 112~145°C )从而与其相邻的正极片 500、负极片 1301相互粘结在一起实现各隔膜层于各正极片 500、负极片 1301的相互粘结。 As one of the schematics of the present embodiment, the inventors provided that a top surface and a bottom surface of each separator layer of each separator bag are coated with a polyvinylidene fluoride (PVDF) to make a top surface of each separator layer. And a PVDF layer is formed on the bottom surface, and when the hot pressing is performed, the hot pressing temperature is brought to a predetermined temperature, so that the PVDF layer of each diaphragm layer is softened under heat (softening temperature) under the pressure and temperature of the arc pressing die 803. The positive electrode sheet 500 and the negative electrode sheet 1301 adjacent to each other are bonded to each other to achieve mutual bonding of the respective separator layers to the positive electrode sheets 500 and the negative electrode sheets 1301.

在本步骤中，在热压时既可以使弧形压制模具 803、弧形支架 802之任一具备一定的温度，也可以使上述的两者均具备一定的温度，以提高热压效果，减少热压时间。 In this step, any one of the curved pressing die 803 and the curved bracket 802 may have a certain temperature during hot pressing, or both of the above may have a certain temperature to improve the hot pressing effect and reduce Hot pressing time.

需要说明的是，本实施的用于锂离子叠片体成型的装置的结构可以如图 8 所示将弧形支架 802的顶部设置成向上突起的弧形，也可以如图 9所示的将弧形支架 902 的顶部设置成向底部凹陷的第一弧形，当叠片体置于第一弧形上时，在第一弧形的承载下形成向上凸起的弧形。将弧形压制模具 903的底部设置成与第一弧形相互匹配的、向底部凸起的第二弧形，实现对叠片体的面对面压制。 It should be noted that the structure of the apparatus for forming a lithium ion laminated body of the present embodiment may be configured such that the top of the curved bracket 802 is curved upwardly as shown in FIG. 8, or may be as shown in FIG. The top of the curved bracket 902 is disposed in a first curved shape that is recessed toward the bottom, and when the laminated body is placed on the first curved shape, an upwardly convex arc is formed under the load of the first curved shape. The bottom of the curved pressing die 903 is disposed in a second curved shape that is matched to the first curved shape and protrudes toward the bottom to effect face-to-face pressing of the laminated body.

步骤 104：层叠电芯体 801静置定型，得到弧形层叠电芯体。 Step 104: The laminated core body 801 is statically set to obtain a curved laminated core body.

在热压至一定时间后，停止热压，使层叠电芯体 801在弧形支架 802的顶部静置一定的时长，使其弧形定型得到弧形层叠电芯体。 After the hot pressing for a certain period of time, the hot pressing is stopped, and the laminated battery body 801 is allowed to stand at the top of the curved holder 802 for a certain period of time, so that the curved shape is obtained by arc-shaped laminated core bodies.

在层叠电芯体 801静置的过程中，可以常温静置，也可以冷却静置；在静置时可以使弧形压制模具 803给层叠电芯体 801施加一定力的作用，也可以不施加使该层叠电芯体 801由于本身重力的作用自然贴于弧形支架 802的顶部定型成型。 In the process in which the laminated core body 801 is allowed to stand, it may be left at room temperature or may be cooled and left to stand; when standing, the curved pressing die 803 may be applied to the laminated core body 801 with a certain force or may not be applied. The laminated core body 801 is naturally molded on the top of the curved bracket 802 due to its own gravity.

步骤 105：铝塑膜入壳封装。本实施还提供了一种铝塑膜壳体，参见图 10示，本实施例的铝塑膜壳体包括有铝塑膜壳体覆盖片 1001、相对铝塑膜壳体覆盖片 1001低位的电芯体凹位 1002。电芯体凹位 1002的顶面呈圆弧状，铝塑膜壳体覆盖片 1001延伸在电芯体凹位 1002 的顶部，以便在将弧形叠片电芯体装配于电芯体凹位 1002 后，将铝塑膜壳体覆盖片 1001覆盖与电芯体凹位 1002顶面使其在铝塑膜壳体覆盖片 1001的重力作用下自然与其内的弧形电芯体的顶面紧贴，然后进行铝塑膜热封实现封装，得到自然呈弧形状的铝塑膜弧形电池。 Step 105: The aluminum plastic film is packaged in a shell. The present invention also provides an aluminum plastic film casing. Referring to FIG. 10, the aluminum plastic film casing of the present embodiment includes an aluminum plastic film casing cover sheet 1001 and a low electric power of the aluminum plastic film casing cover sheet 1001. The core has a recess 1002. The top surface of the cell body recess 1002 is arcuate, and the aluminum film casing cover sheet 1001 extends over the top of the cell body recess 1002 to fit the arcuate laminated core body to the cell body recess. After 1002, the aluminum plastic film casing cover sheet 1001 is covered with the top surface of the recessed portion 1002 of the electric core body so as to be tightly pressed against the top surface of the curved electric core body inside the aluminum plastic film casing cover sheet 1001. After being attached, the aluminum plastic film is heat-sealed to realize encapsulation, and a curved arc-shaped aluminum-plastic film battery is obtained.

在本步骤中，本实施例铝塑膜壳体的电芯体凹位 1002的顶面可以设计成如图 10所示的向上底部凹陷的弧形，也可以如图 11所示的将电芯体凹位 1102 的顶面设计成向顶部凸起的弧形。 In this step, the top surface of the cell body recess 1002 of the aluminum-plastic film casing of the present embodiment may be designed to have an arc shape that is recessed toward the upper bottom as shown in FIG. 10, or may be a battery cell as shown in FIG. The top surface of the body recess 1102 is designed to be curved toward the top.

在本实施例中，由于铝塑膜壳体的电芯体凹位 1002为弧形，故在将铝塑膜壳体覆盖片 1001覆盖在电芯体凹位 1002顶部后，进行电芯体凹位 1002四周任一边缘的塑封时，均配合该电芯体凹位 1002的弧形采用弧形状的塑封模具进行塑封，使得到图 12所示的弧形的铝塑膜叠片锂离子电池。 In this embodiment, since the recessed portion 1002 of the aluminum plastic film casing is curved, after the aluminum plastic film casing cover sheet 1001 is covered on the top of the concave portion 1002 of the electric core body, the electric core concave is performed. When the plastic seal of any one of the edges of the position 1002 is matched with the arc of the concave portion 1002 of the electric core body, the arc-shaped plastic mold is used for molding, so that the curved aluminum-plastic film laminated lithium ion battery shown in FIG. 12 is obtained.

作为本实施例的一种示意：在进行铝塑膜壳体热封时，可以先将图 12中的顶端 1201进行铝塑膜热封，然后将电芯体凹位 1002侧、与铝塑膜壳体覆盖片 1001延伸边缘相邻的一弧形侧边进行铝塑膜热封，将另一弧形边缘预留为开口作为注液口进行电解液灌注，然后进行再该注液口所在端部封气囊袋、化成、在气囊袋内侧进行抽真空二次热封，即可得到图 13所示的铝塑膜弧形叠片电芯体锂离子电池。 As an illustration of the embodiment, when the aluminum plastic film casing is heat-sealed, the top end 1201 of FIG. 12 may be heat-sealed by an aluminum plastic film, and then the cell body is recessed to the side of the 1002 side, and the aluminum plastic film is used. An arc-shaped side edge adjacent to the extending edge of the cover sheet 1001 is heat-sealed by an aluminum plastic film, and another curved edge is reserved as an opening for electrolyte injection, and then the end of the liquid injection port is performed. The airbag bag is sealed, chemicalized, and vacuum-sealed twice inside the airbag bag to obtain the aluminum-plastic film arc-shaped laminated core lithium ion battery shown in FIG.

另外，作为本实施例的示意，在本实施例中可以但不限于如图 13所示的进一步：选用长度各不相同的正极片 500、负极片 1301，使配合弧形叠片电芯体的弧形弯度，沿弧形层叠电芯体的弧形由内到外方向，正极片 500、负极片 1301 的自然长度由短到长变化，从而得到在弧形层叠电芯体两端部相平的、外形良好整齐的叠片体，进一步有利于提高叠片锂离子电池的规格一致性。 In addition, as an illustration of the embodiment, in the embodiment, the positive electrode sheet 500 and the negative electrode sheet 1301 having different lengths may be selected as shown in FIG. 13 to match the arc-shaped laminated battery core body. The curved camber, the arc shape of the arc-shaped laminated core body is from the inside to the outside, and the natural length of the positive electrode sheet 500 and the negative electrode sheet 1301 is changed from short to long, so that the ends of the curved laminated core body are leveled. The well-formed laminated body further enhances the uniformity of the laminated lithium-ion battery.

作为本步骤的实施示意之一，本实施例提供了一种特别适用于本实施例弧形锂离子电池封装的铝塑膜封装模具，该模具可用于封装弧形锂离子电池的弧形侧边。 As one of the implementation examples of the present step, the present embodiment provides an aluminum plastic film packaging mold particularly suitable for the arc-shaped lithium ion battery package of the embodiment, which can be used for encapsulating the curved side of the curved lithium ion battery. .

参见图 15、图 16、图 17所示，该铝塑膜封装模具主要包括上封部 1401、下封部 1402。上封部 1401的底部为第一曲面，下封部 1402的顶部分别为第二曲面，第一曲面、第二曲面可相互面对面紧贴配合。从而在对弧形锂离子电池的弧形侧面进行封装时可以配合该弧形的封装曲面进行封装，既保证了封装的铝塑膜能够紧贴弧形电芯体，又避免了对铝塑膜的拉伸，避免铝塑膜发生形变导致外观不良品的产生。 Referring to FIG. 15 , FIG. 16 and FIG. 17 , the aluminum plastic film packaging mold mainly comprises an upper sealing portion 1401 . Lower seal portion 1402. The bottom of the upper sealing portion 1401 is a first curved surface, and the top of the lower sealing portion 1402 is respectively a second curved surface, and the first curved surface and the second curved surface can be in close contact with each other. Therefore, when the curved side of the curved lithium ion battery is packaged, the arc-shaped package curved surface can be packaged, thereby ensuring that the packaged aluminum plastic film can be in close contact with the curved electric core body, and the aluminum plastic film is avoided. The stretching prevents the deformation of the aluminum plastic film and causes the appearance of defective products.

在本实施例中，可以如图 15、图 16、图 17所示将上封部 1401的第一曲面设计成向下凸起的弧面，将下封部 1402的第二曲面设计成向下凹进的弧面。还可以将上封部 1401 的第一曲面设计成面向上凹进的弧面，将下封部 1402 的第二曲面设计成向上凸起的弧面。具体根据被封装的铝塑膜壳体内的电芯体凹位 1002的弧形进行设计。 In this embodiment, as shown in FIG. 15, FIG. 16, FIG. 17, the first curved surface of the upper sealing portion 1401 is designed as a downward convex curved surface, and the second curved surface of the lower sealing portion 1402 is designed to be downward. Concave curved surface. It is also possible to design the first curved surface of the upper sealing portion 1401 to face the upwardly concave curved surface, and the second curved surface of the lower sealing portion 1402 to be designed as an upward convex curved surface. Specifically, it is designed according to the arc shape of the electric core recess 1002 in the packaged aluminum plastic film casing.

在进行铝塑膜封装时，可以通过气缸或者其他的推进动力装置移动上封部 1401、下封部 1402的任一或者两者，并且使上封部 1401、下封部 1402的任一或者两者分别具备一定的温度，在上封部 1401、下封部 1402对铝塑膜进行塑封时，在压力以及温度下，上下层的铝塑膜热熔结合在一起实现密封连接。 When the aluminum plastic film package is performed, either or both of the upper sealing portion 1401 and the lower sealing portion 1402 may be moved by a cylinder or other propulsion power device, and any one or both of the upper sealing portion 1401 and the lower sealing portion 1402 may be caused. Each of them has a certain temperature. When the aluminum sealing film is molded by the upper sealing portion 1401 and the lower sealing portion 1402, the upper and lower aluminum plastic films are thermally fused together to achieve a sealed connection under pressure and temperature.

作为本步骤的实施示意之一，本实施例还提供了一种利用上述的铝塑膜模具对弧形锂离子电池的铝塑膜封装的方法，参见图 18所示，该方法主要包括：步骤 1801：装入弧形层叠电芯体。 As one of the implementation examples of the present step, the embodiment further provides a method for packaging an aluminum plastic film of an arc-shaped lithium ion battery by using the above-mentioned aluminum plastic film mold. Referring to FIG. 18, the method mainly includes: 1801: Loaded into a curved laminated battery body.

在本步骤中，将弧形层叠电芯体置于所述铝塑膜壳体的电芯体凹位 1002 内，该电芯体凹位 1002的顶面的弧度与弧形层叠电芯体的弧度相匹配，使弧形层叠电芯体的底面与所述电芯体凹位 1002的顶面面对面贴合。 In this step, the arc-shaped laminated core body is placed in the cell body recess 1002 of the aluminum-plastic film casing, the curvature of the top surface of the cell body recess 1002 and the arc-shaped laminated core body The radians are matched such that the bottom surface of the arc-shaped laminated core body is in face-to-face contact with the top surface of the battery core recess 1002.

进一步详细介绍可以但不限于参见图 10、图 11、图 12以及上文的相应描述。 Further details can be made, but are not limited to, with reference to Figures 10, 11, and 12 and the corresponding description above.

步骤 1802：覆盖铝塑膜壳体覆盖片 1001。 Step 1802: Covering the aluminum plastic film casing cover sheet 1001.

参见图 10、9所示，将铝塑膜壳覆盖片过盈覆盖在弧形层叠电芯体的顶面，使该铝塑膜壳覆盖片过盈覆盖电芯体凹位 1002顶面。 Referring to Figures 10 and 9, the aluminum plastic film cover sheet is overcoated on the top surface of the curved laminated core body such that the aluminum plastic film cover covers the top surface of the recess 1002.

本实施例将铝塑膜壳体覆盖片 1001在电芯体凹位 1002的延伸连接端部记为第一弧形端部，将与第一弧形端部相对的另一弧形端部记为第二弧形端部。 In this embodiment, the aluminum plastic film casing cover sheet 1001 is recorded as a first curved end portion at the extended connection end of the core body recess 1002, and another curved end portion opposite to the first curved end portion is recorded. It is the second curved end.

步骤 1803：平面热封工艺封装第二弧形端部。 Step 1803: The planar heat sealing process encapsulates the second curved end.

本步骤可以但不限于采用现有技术实现平面热封工艺封装第一弧形端部，即于铝塑膜壳覆盖片延伸连接端相对的端部。即采用水平面对面相对的第一上封部 1401、第一下封部 1402热封位于所述第一上封部 1401、第一下封部 1402 之间的第二弧形端部的铝塑膜，使第二弧形端部处的所述铝塑膜壳体覆盖片 1001与所述电芯体凹位 1002外的铝塑膜热熔密封在一起。 This step may, but is not limited to, implementing a planar heat sealing process to encapsulate the first curved end portion by using the prior art. That is, the aluminum plastic film cover sheet covers the opposite ends of the connecting end. That is, the first upper sealing portion 1401 and the first lower sealing portion 1402 that face each other are used to heat-sealing the aluminum-shaped film at the second curved end portion between the first upper sealing portion 1401 and the first lower sealing portion 1402. The aluminum plastic film casing cover sheet 1001 at the second curved end portion is heat-sealed together with the aluminum plastic film outside the battery core recess 1002.

步骤 1804：弧形曲面热封一弧形侧面。 Step 1804: The curved surface heat seals an arcuate side.

将此处在被封装的弧形侧面记为第一弧形侧面。 Here, the curved side of the package is referred to as the first curved side.

采用图 14、图 15、图 16所示的模^ (将上封部 1401记为第二上封部 1401 , 将下封部 1402记为第二下封部 1402 )热封位于第二上封部 1401、第二下封部 1402之间的第一弧形侧面，使第一弧形侧面处的铝塑膜壳体覆盖片 1001与电芯体凹位 1002外的铝塑膜热熔密封在一起。 The mold shown in FIGS. 14 , 15 , and 16 (the upper sealing portion 1401 is referred to as a second upper sealing portion 1401 and the lower sealing portion 1402 is referred to as a second lower sealing portion 1402 ) is heat-sealed in the second upper seal. The first curved side surface between the portion 1401 and the second lower sealing portion 1402 causes the aluminum plastic film casing cover sheet 1001 at the first curved side surface and the aluminum plastic film outside the recessed portion 1002 of the electric core body to be thermally melt sealed. together.

同理，采用步骤 1804的方法可以实现对第二弧形侧面的铝塑膜热封，得到弧形铝塑膜锂离子电池。 Similarly, the aluminum foil film on the second curved side can be heat-sealed by the method of step 1804, and a curved aluminum-plastic film lithium ion battery is obtained.

为了进一步方便人们对本实施例的理解，以下结合锂离子电池的制备工艺进行进一步讲解。 In order to further facilitate the understanding of the present embodiment, the following further describes the preparation process of the lithium ion battery.

在步骤 1804后，还执行以下： After step 1804, the following is also performed:

步骤 1805：高温烘烤。 Step 1805: Baking at a high temperature.

按照现有技术的锂离子电池制备工艺进行高温烘烤，去除水分。 According to the prior art lithium ion battery preparation process, high temperature baking is performed to remove moisture.

步骤 1806：注液。 Step 1806: Inject the solution.

以当前未进行铝塑膜热封的第二弧形侧面为注液口，往电芯体凹位 1002 内灌注电解液，使弧形层叠电芯体充盈浸泡在所述电解液中。 The second curved side surface which is not currently heat-sealed by the aluminum plastic film is used as a liquid filling port, and the electrolyte is poured into the concave portion 1002 of the electric core body, so that the curved laminated electric core body is filled and immersed in the electrolytic solution.

在注液后进行化成，使具体的注液工艺可以但不限于参见现有技术。 The formation is carried out after the injection, so that the specific infusion process can be, but is not limited to, the prior art.

步骤 1807：封气囊袋。 Step 1807: Seal the airbag bag.

采用与步骤 1804的原理相同的弧面侧封工艺，在第二弧形侧面的右边距离电芯体凹位 1002—定距离的位置进行气囊袋封装。 The airbag bag is packaged at the position of the right side of the second curved side from the concave position of the core body 1002 by using the same arc side sealing process as the principle of the step 1804.

步骤 1808：化成。 Step 1808: Forming.

本步骤使电解液充分反应，使其中的水分以及反应中产生的气体排出在气囊袋，以便后续被真空抽出。 This step allows the electrolyte to react sufficiently to allow the moisture therein and the gas generated in the reaction to be discharged into the bladder for subsequent vacuum extraction.

步骤 1809：抽真空弧面侧封第二弧形侧面。 Step 1809: The second curved side is sealed side by side with a vacuum.

在气囊袋内靠近电芯体凹位 1002外，采用与步骤 1804的原理相同的弧面侧封电芯体凹位 1002的第二弧形侧面，此时剪除多余的铝塑膜即得弧形锂离子电池成品。 The same arc surface as the principle of step 1804 is used in the airbag bag near the recess 1002 of the core body. The second curved side of the recess 1002 of the side wall is sealed, and at this time, the excess aluminum plastic film is cut off to obtain the finished product of the curved lithium ion battery.

由上可见，应用本实施例技术方案，由于本实施例在得到锂离子电池层叠电芯体 801 后，通过将叠片体中部固定，让叠片体自然搁置于弧形支架 802 的顶部自然成型后在该弧形上进行弧形热压成型定型，然后装配进铝塑膜壳体的弧形电芯体凹位 1002 ,然后进行铝塑膜封装得到。 As can be seen from the above, the technical solution of the embodiment is applied. Since the lithium ion battery laminated core body 801 is obtained in this embodiment, the laminated body is naturally placed on the top of the curved support 802 by fixing the middle portion of the laminated body. Then, the arc-shaped hot press forming is performed on the curved shape, and then assembled into the arc-shaped electric core concave portion 1002 of the aluminum plastic film casing, and then obtained by aluminum plastic film encapsulation.

综上，应用本实施例技术方案，由于本实施例弧形锂离子电池内的各极片、隔膜以及铝塑膜壳体均处于自然状态而不通过形变拉伸成型，有利于确保锂离子电池的电化学性能的稳定性以及安全性，有利于降低产品的不良率。 In summary, according to the technical solution of the embodiment, since the pole pieces, the diaphragm and the aluminum plastic film casing in the curved lithium ion battery are in a natural state and are not formed by deformation deformation, it is beneficial to ensure the lithium ion battery. The stability and safety of the electrochemical performance are beneficial to reduce the defect rate of the product.

实施例 2： Example 2:

参见图 13所示，本实施例提供的锂离子电池的叠片锂离子电池，其包括：弧形层叠电芯体以及铝塑膜壳体。其中各部分的结构以及连接关系如下： Referring to FIG. 13, the laminated lithium ion battery of the lithium ion battery provided by the embodiment includes: a curved laminated electric core body and an aluminum plastic film casing. The structure and connection relationship of each part are as follows:

弧形层叠电芯体的结构参见图 14所示，弧形层叠电芯体由层叠的自然成型呈弧形的负极片 1301、正极片 500构成，任一正极片 500、负极片 1301之间分别间隔有一自然成型呈弧形的隔膜层，各隔膜层分别与本隔膜层相邻的所述正极片 500、负极片 1301相互粘结。具体的制备工艺可以但不限于参见实施例 1中的相应介绍。 Referring to FIG. 14, the curved laminated core body is composed of a laminated natural-formed arc-shaped negative electrode sheet 1301 and a positive electrode sheet 500, and each of the positive electrode sheet 500 and the negative electrode sheet 1301 is respectively The separator is provided with a substantially curved diaphragm layer, and the positive electrode sheet 500 and the negative electrode sheet 1301 adjacent to the separator layer are bonded to each other. The specific preparation process can be, but is not limited to, the corresponding introduction in Example 1.

铝塑膜壳体的结构参见图 10或 9所示，在铝塑膜壳体上形成有电芯体凹位 1002 ,弧形层叠电芯体限位在电芯体凹位 1002内，被铝塑膜壳体密封。具体的制备工艺可以但不限于参见实施例 1中的相应介绍。 The structure of the aluminum plastic film casing is as shown in FIG. 10 or 9. The electric core body recess 1002 is formed on the aluminum plastic film casing, and the curved laminated electric core body is limited in the recessed position 1002 of the electric core body, and is aluminum. The plastic film case is sealed. A specific preparation process can be, but is not limited to, the corresponding introduction in Example 1.

由上可见，应用本实施例技术方案，由于本实施例在得到锂离子电池层叠电芯体 801各极片、隔膜以及铝塑膜壳体均处于自然状态而不通过形变拉伸成型。相对于现有技术的以下技术方案：先按照现有技术制备顶面以及底面均为平直状的铝塑膜锂离子电池成品后，对该平直状的铝塑膜锂离子电池进行弯曲压制定型，在弯曲压制过程中，限位于铝塑膜固定空间内的锂离子电池内的极片以及隔膜发生皱折或者拉伸形变，容易导致电池极片的结构受损，降低电池的电化学性能，并且，在弯曲压制过程中铝塑膜壳体的各处也发生皱折或者被拉伸的形变，导致外观不良品的产生。故应用本实施例技术方案有利于确保锂离子电池的电化学性能的稳定性以及安全性，有利于降低产品的不良率。 It can be seen from the above that, in the embodiment, the pole piece, the diaphragm and the aluminum plastic film casing of the lithium ion battery laminated core body 801 are all in a natural state without being deformed by deformation. Compared with the prior art, the following technical solutions: firstly, according to the prior art, a flat aluminum-plastic film lithium ion battery with a top surface and a flat bottom surface is prepared, and the flat aluminum plastic film lithium ion battery is bent and pressed. Stereotype, during the bending and pressing process, the pole piece and the diaphragm in the lithium ion battery in the fixed space of the aluminum plastic film are wrinkled or stretched, which easily causes damage to the structure of the battery pole piece and reduces the electrochemical performance of the battery. Moreover, wrinkles or stretched deformations occur in the aluminum plastic film casing throughout the bending and pressing process, resulting in the appearance of defective products. Therefore, the application of the technical solution of the embodiment is advantageous for ensuring the stability and safety of the electrochemical performance of the lithium ion battery, and is advantageous for reducing the defect rate of the product.

作为本实施例的示意一，参见图 5所示，在本实施例弧形层叠电芯体内，各所述正极片 500可分别装配在各隔膜袋中，隔膜袋包括：第一隔膜、第二隔膜。其中第一隔膜、第二隔膜分别正对位于各正极片 500的顶部、底部；在第一隔膜、第二隔膜的至少两纵向边缘上分别形成不相连续的至少两个热封封口，所述第一隔膜、第二隔膜在各所述热封封口处热熔连接。进一步具体的制备工艺以及有益效果可以但不限于参见实施例 1中的相应介绍。 As shown in FIG. 5, in the arc-shaped laminated battery body of the present embodiment, each of the positive electrode sheets 500 may be respectively assembled in each diaphragm bag, and the diaphragm bag includes: a first diaphragm, a second Diaphragm. Wherein the first diaphragm and the second diaphragm are respectively located at the top and the bottom of each of the positive electrode sheets 500; at least two longitudinal seal edges of the first diaphragm and the second diaphragm respectively form at least two heat seals which are not continuous, The first diaphragm and the second diaphragm are thermally fused at each of the heat seals. Further specific preparation processes and benefits can be, but are not limited to, the corresponding description in Example 1.

可选地，在本实施例弧形层叠电芯体内，在各正极片隔膜袋中，各不相连续的间隔热封封口分别设置在第一隔膜、第二隔膜的四周边缘上。进一步具体的制备工艺以及有益效果可以但不限于参见实施例 1中的相应介绍。 Optionally, in the arc-shaped laminated core body of the embodiment, in each of the positive-electrode sheet separator bags, the respective spaced-apart heat seals are respectively disposed on the peripheral edges of the first diaphragm and the second diaphragm. Further specific preparation processes and benefits can be, but are not limited to, the corresponding description in Example 1.

作为本实施例的示意二，参见图 6所示，在本实施例弧形层叠电芯体内，各所述正极片 500可分别装配在各隔膜袋中，隔膜袋包括：第一隔膜、第二隔膜。其中第一隔膜、第二隔膜分别正对位于各所述正极片 500的顶部、底部；在第一隔膜、第二隔膜的至少一宽度端部上分别形成热封封口，第一隔膜、第二隔膜在所述热封封口处热熔连接。 As shown in FIG. 6, in the arc-shaped laminated battery body of the present embodiment, each of the positive electrode sheets 500 may be respectively assembled in each diaphragm bag, and the diaphragm bag includes: a first diaphragm, a second Diaphragm. Wherein the first diaphragm and the second diaphragm are respectively located at the top and the bottom of each of the positive electrode sheets 500; and at least one width end of the first diaphragm and the second diaphragm respectively form a heat sealing seal, the first diaphragm and the second The diaphragm is thermally fused at the heat seal.

可选地，在本实施例弧形层叠电芯体内，形成在宽度端部上的热封口可以为不相连续的间隔热封口，也可以为一连续的热封封口。 Optionally, in the arc-shaped laminated core body of the embodiment, the heat seal formed on the width end portion may be a non-continuous interval heat seal or a continuous heat seal.

可选地，在本实施例弧形层叠电芯体内，可以分别在第一隔膜、第二隔膜上、正极片 500的极耳焊接部 5001所伸出的第一宽度端部上设置上述的热封封口，也可以在与正极片 500的极耳焊接部 5001相对的第二宽度端部上设置上述的热封封口，还可以在两端部均设置上述的热封口。进一步具体的制备工艺以及有益效果可以但不限于参见实施例 1中的相应介绍。 Optionally, in the arc-shaped laminated battery body of the embodiment, the heat may be disposed on the first diaphragm, the second diaphragm, and the first width end portion of the tab welding portion 5001 of the positive electrode sheet 500. The sealing opening may be provided with the above-described heat sealing seal at the second width end portion opposed to the tab welding portion 5001 of the positive electrode sheet 500, or the above-described heat sealing opening may be provided at both end portions. Further specific preparation processes and benefits can be, but are not limited to, the corresponding description in Example 1.

作为本实施例的示意三，参见图 7所示，在本实施例弧形层叠电芯体内，各所述正极片 500可分别装配在各隔膜袋中，隔膜袋包括：第一隔膜、第二隔膜。其中第一隔膜、第二隔膜分别正对位于各所述正极片 500的顶部、底部；在第一隔膜、第二隔膜的四个顶角的至少任意两个上分别形成有热封封口，第一隔膜、第二隔膜在热封封口处热熔连接。 As a schematic three of the embodiment, as shown in FIG. 7, in the arc-shaped laminated battery body of the embodiment, Each of the positive electrode sheets 500 may be respectively assembled in each of the diaphragm pockets, and the diaphragm pockets include: a first diaphragm and a second diaphragm. Wherein the first diaphragm and the second diaphragm are respectively located at the top and the bottom of each of the positive electrode sheets 500; and at least two of the four apex angles of the first diaphragm and the second diaphragm are respectively formed with heat sealing seals, A diaphragm and a second diaphragm are thermally fused at the heat seal.

可选地，在本实施例弧形层叠电芯体内，可以仅在第一隔膜、第二隔膜的第一顶角、第二顶角、第三顶角、第四顶角的任意两个顶角、任三个顶角、或者四个顶角进行热封，本发明人在进行本发明研究过程中发现，仅在两顶角热封时，采用对角顶角热封的工艺有利于更好地对正极片 500进行定位；采用四顶角热封，能够实现对正极片 500的完全定位，避免任一方向的移位。进一步具体的制备工艺以及有益效果可以但不限于参见实施例 1中的相应介绍。 Optionally, in the arc-shaped laminated core body of the embodiment, only any two of the first apex angle, the second apex angle, the third apex angle, and the fourth apex angle of the first diaphragm and the second diaphragm may be The horn, any three apex angles, or four apex angles are heat-sealed, and the inventors have found during the research of the present invention that the heat sealing process using the diagonal apex angle is advantageous in the heat sealing of only the two corners. The positive electrode sheet 500 is well positioned; the four-corner heat sealing can achieve complete positioning of the positive electrode sheet 500 and avoid displacement in either direction. Further specific preparation processes and benefits can be, but are not limited to, the corresponding description in Example 1.

实施例 3： Example 3:

本实施例提供本实施例提供的锂离子电池的叠片锂离子电池与实施例 2 所不同之处仅在于，在本实施例中，选用长度各不相同的正极片 500、负极片 1301，使配合弧形叠片电芯体的弧形弯度，沿弧形层叠电芯体的弧形由内到外方向，正极片 500、负极片 1301 的自然长度由短到长变化，从而得到在弧形层叠电芯体两端部相平的、外形良好整齐的叠片体，进一步有利于提高叠片锂离子电池的规格一致性。 The laminated lithium ion battery of the lithium ion battery provided in this embodiment differs from the second embodiment only in that, in this embodiment, the positive electrode sheet 500 and the negative electrode sheet 1301 having different lengths are selected. In accordance with the arc curvature of the arc-shaped laminated battery body, the arc shape of the arc-shaped laminated core body is changed from the inside to the outside, and the natural length of the positive electrode sheet 500 and the negative electrode sheet 1301 is changed from short to long, thereby obtaining an arc shape. The laminated, well-formed laminated body at both ends of the laminated core body is further advantageous for improving the uniformity of the laminated lithium ion battery.

试验对比分析： Comparative analysis of the test:

为了进一步说明本实施例的技术效果，以下通过相同型号规格的对照例与本发明实施例的对比文件试验分析进行说明： In order to further explain the technical effects of the present embodiment, the following is a description of the comparative document test analysis of the same model specification and the embodiment of the present invention:

对照例：用现有技术，直接将上下平面的铝塑膜锂离子电池进行弯曲压制得到的弧形锂离子电池； Comparative Example: an arc-shaped lithium ion battery obtained by bending and pressing an aluminum-plastic film lithium ion battery of an upper and lower plane directly by a prior art;

实施例 1：采用本实施例 1 ,得到自然非形变成型的弧形层叠电芯体，装配于弧形电芯体凹位内进行铝塑膜封装得到的弧形锂离子电池，其中极片袋采用正极片隔膜袋制备方案一； Embodiment 1: Using the first embodiment, a curved non-morphed arc-shaped laminated core body is obtained, and an arc-shaped lithium ion battery obtained by packaging an aluminum plastic film in a concave portion of a curved electric core body is obtained. The tablet bag adopts a positive electrode diaphragm bag preparation scheme 1;

实施例 2：采用本实施例 1 ,得到自然非形变成型的弧形层叠电芯体，装配于弧形电芯体凹位内进行铝塑膜封装得到的弧形锂离子电池，其中极片袋采用正极片隔膜袋制备方案二； Embodiment 2: Using the first embodiment, a curved non-morphed arc-shaped laminated core body is obtained, and an arc-shaped lithium ion battery obtained by packaging an aluminum plastic film in a concave portion of a curved electric core body is obtained. The tablet bag adopts a positive electrode sheet separator bag preparation scheme 2;

实施例 3：采用本实施例 1 ,得到自然非形变成型的弧形层叠电芯体，装配于弧形电芯体凹位内进行铝塑膜封装得到的弧形锂离子电池，其中极片袋采用正极片隔膜袋制备方案三； Embodiment 3: Using the first embodiment, a curved laminated electric core body of a natural non-formation type is obtained. The arc-shaped lithium ion battery obtained by encapsulating the aluminum plastic film in the concave position of the curved electric core body, wherein the pole piece bag adopts the positive electrode piece diaphragm bag preparation scheme 3;

分别在 1000颗电池试样，进行测试锂离子电池的电化学性能，得到表一所示的数据： The electrochemical performance of the lithium ion battery was tested on 1000 battery samples, and the data shown in Table 1 was obtained:

表一：电性能实验数据结果对比表 Table 1: Comparison of electrical performance experimental data results

由上可见，应用本实施例技术方案有利于降低产品的外观不良率，提高产品的电化学性能。 It can be seen from the above that the application of the technical solution of the embodiment is advantageous for reducing the appearance defect rate of the product and improving the electrochemical performance of the product.

以上所述的实施方式，并不构成对该技术方案保护范围的限定。任何在上述实施方式的精神和原则之内所作的修改、等同替换和改进等，均应包含在该技术方案的保护范围之内。 The embodiments described above do not constitute a limitation on the scope of protection of the technical solutions. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above-described embodiments are intended to be included within the scope of the technical solution.

Claims

权利要求 Rights request

1、一种叠片锂离子电池的制备方法，其特征是，包括： 1. A method for preparing a laminated lithium-ion battery, which is characterized by including:

层叠负极片、正极片得到层叠电芯体，在所述层叠电芯体内任一所述正极片、负极片之间分别间隔有一隔膜层， The negative electrode sheet and the positive electrode sheet are stacked to obtain a laminated battery core body. In the laminated battery core body, any one of the positive electrode sheet and the negative electrode sheet is separated by a separator layer.

固定所述层叠电芯体的中部，将所述层叠电芯体自然搁置于一弧形支架的顶部，在所述弧形支架上热压所述层叠电芯体至预定时间，使所述层叠电芯体内各隔膜层分别与所述隔膜层相邻的所述正极片、负极片相互粘结在一起；在所述弧形支架上静置所述层叠电芯体直至所述层叠电芯体定型成与所述弧形支架相匹配的弧形，得到弧形层叠电芯体； Fix the middle part of the laminated battery core body, place the laminated battery core body naturally on the top of an arc-shaped bracket, and hot-press the laminated battery core body on the arc-shaped bracket for a predetermined time, so that the laminated battery core body Each separator layer in the battery core body is bonded to each other with the positive electrode sheet and the negative electrode sheet adjacent to the separator layer; the laminated battery core body is placed on the arc-shaped support until the laminated battery core body is Shaping into an arc shape matching the arc-shaped bracket to obtain an arc-shaped laminated battery core body;

将所述弧形层叠电芯体置入铝塑膜壳体的电芯体凹位内，所述电芯体凹位的顶面的弧度与所述弧形层叠电芯体的弧度相匹配，使所述弧形层叠电芯体的底面与所述电芯体凹位的顶面面对面贴合，在所述弧形层叠电芯体的顶面覆盖铝塑膜壳体的顶面铝塑膜层，热封铝塑膜，使所述弧形层叠电芯体封装在所述铝塑膜壳体内，即得所述叠片锂离子电池。 The arc-shaped laminated battery core body is placed in the battery core body recess of the aluminum-plastic film case, and the curvature of the top surface of the battery core body recess matches the curvature of the arc-shaped laminated battery core body, Make the bottom surface of the arc-shaped laminated battery core body and the top surface of the recessed position of the battery core body face to face, and cover the top surface of the arc-shaped laminated battery core body with the aluminum-plastic film on the top surface of the aluminum-plastic film case. layer, heat-seal aluminum-plastic film, and encapsulate the arc-shaped laminated battery core body in the aluminum-plastic film casing, thereby obtaining the laminated lithium-ion battery.

2、根据权利要求 1所述的叠片锂离子电池的制备方法，其特征是，各所述隔膜层的顶面以及底面分别涂布有聚偏氟乙烯层； 2. The method for preparing a laminated lithium-ion battery according to claim 1, wherein the top surface and bottom surface of each separator layer are respectively coated with a polyvinylidene fluoride layer;

使所述层叠电芯体内各隔膜层分别与所述隔膜层相邻的所述正极片、负极片相互粘结在一起，具体是： Each separator layer in the laminated battery core is bonded to the positive electrode sheet and the negative electrode sheet adjacent to the separator layer, specifically:

在所述热压温度下，所述层叠电芯体内的各聚偏氟乙烯层与所述正极片、负极片粘结在一起。 At the hot pressing temperature, each polyvinylidene fluoride layer in the laminated battery core body is bonded to the positive electrode sheet and the negative electrode sheet.

3、根据权利要求 1所述的叠片锂离子电池的制备方法，其特征是，层叠负极片、正极片得到层叠电芯体，在所述层叠电芯体内任一所述正极片、负极片之间分别间隔有一隔膜层，具体是： 3. The method for preparing a laminated lithium-ion battery according to claim 1, wherein the negative electrode sheet and the positive electrode sheet are stacked to obtain a laminated battery core body, and any one of the positive electrode sheet and the negative electrode sheet in the laminated battery core body There is a separator layer between them, specifically:

层叠所述负极片、正极片隔膜袋得到所述层叠电芯体，在所述由两隔膜片制成的正极片隔膜袋内分别置入有一所述正极片。 The negative electrode sheet and the positive electrode sheet separator bag are stacked to obtain the laminated battery core body, and one of the positive electrode sheet is respectively placed in the positive electrode sheet separator bag made of two separator sheets.

4、根据权利要求 3所述的叠片锂离子电池的制备方法，其特征是，在所述由两隔膜片制成的正极片隔膜袋内分别置入一所述正极片，得到各所述正极片隔膜袋，包括： 4. The method for preparing a laminated lithium-ion battery according to claim 3, wherein one of the positive electrode sheets is respectively placed in the positive electrode sheet separator bag made of two separator sheets to obtain each of the positive electrode sheets. Positive electrode separator bag, including:

在每正极片的顶面、底面分别放置第一隔膜、第二隔膜，使所述正极片被所述第一隔膜、第二隔膜上下正对覆盖，热封所述第一隔膜、第二隔膜的至少两纵向边缘，在两所述纵向边缘上分别形成不相连续的至少两个热封封口，所述第一隔膜、第二隔膜在各所述热封封口处热熔连接，即得所述正极片隔膜袋。 Place a first separator and a second separator on the top and bottom surfaces of each positive electrode sheet, respectively, so that the positive electrode sheet is The first diaphragm and the second diaphragm cover each other up and down, and at least two longitudinal edges of the first diaphragm and the second diaphragm are heat-sealed, and at least two discontinuous heat-sealing openings are respectively formed on the two longitudinal edges. , the first separator and the second separator are hot-melt connected at each of the heat-sealing seals to obtain the positive electrode sheet separator bag.

5、根据权利要求 4所述的叠片锂离子电池的制备方法，其特征是，热封所述第一隔膜、第二隔膜的至少两纵向边缘，在两所述纵向边缘上分别形成不相连续的至少两个热封封口，具体是： 5. The method for preparing a laminated lithium-ion battery according to claim 4, characterized in that, at least two longitudinal edges of the first separator and the second separator are heat-sealed, and non-phased edges are respectively formed on the two longitudinal edges. At least two heat seals in a row, specifically:

热封所述第一隔膜、第二隔膜的四周边缘，在所述第一隔膜、第二隔膜的四周边缘上均形成有所述热封封口。 The peripheral edges of the first separator and the second separator are heat sealed, and the heat sealing seals are formed on the peripheral edges of the first separator and the second separator.

6、根据权利要求 3所述的叠片锂离子电池的制备方法，其特征是，在所述由两隔膜片制成的正极片隔膜袋内分别置入一所述正极片，得到各所述正极片隔膜袋，包括： 6. The method for preparing a laminated lithium-ion battery according to claim 3, wherein one of the positive electrode sheets is respectively placed in the positive electrode sheet separator bag made of two separator sheets to obtain each of the positive electrode sheets. Positive electrode separator bag, including:

在每正极片的顶面、底面分别放置第一隔膜、第二隔膜，使所述正极片被所述第一隔膜、第二隔膜上下正对覆盖，热封所述第一隔膜、第二隔膜的至少一宽度端部，在所述宽度端部上形成热封封口，所述第一隔膜、第二隔膜在所述热封封口处热熔连接，即得所述正极片隔膜袋。 Place a first separator and a second separator on the top and bottom surfaces of each positive electrode sheet respectively, so that the positive electrode sheet is covered by the first separator and the second separator up and down, and heat seal the first separator and the second separator. At least one width end of the bag is formed with a heat seal on the width end, and the first separator and the second separator are heat-melt connected at the heat seal to obtain the positive electrode sheet separator bag.

7、根据权利要求 6所述的叠片锂离子电池的制备方法，其特征是，热封所述第一隔膜、第二隔膜的至少一宽度端部，具体是： 7. The method for preparing a laminated lithium-ion battery according to claim 6, wherein at least one width end of the first separator and the second separator is heat-sealed, specifically:

在至少一所述宽度端部上形成不相互连续的至少两个所述热封封口，或者， Form at least two said heat seals that are not continuous with each other on at least one of said width ends, or,

8、根据权利要求 7所述的叠片锂离子电池的制备方法，其特征是，热封所述第一隔膜、第二隔膜的至少一宽度端部，具体是： 8. The method for preparing a laminated lithium-ion battery according to claim 7, wherein at least one width end of the first separator and the second separator is heat-sealed, specifically:

热封所述第一隔膜、第二隔膜上、所述正极片的极耳焊接部在所述第一宽度端部伸出所在的第一宽度端部； Heat-seal the first width end where the tab welding portion of the positive electrode sheet protrudes from the first width end on the first separator and the second separator;

或者，热封所述第一隔膜、第二隔膜上、所述正极片的极耳焊接部相对的第二宽度端部； Alternatively, heat seal the second width end portions of the first separator and the second separator that are opposite to the tab welding portion of the positive electrode sheet;

或者，热封所述第一隔膜、第二隔膜上的两宽度端部。 Alternatively, the two width ends of the first separator and the second separator are heat-sealed.

9、根据权利要求 3所述的叠片锂离子电池的制备方法，其特征是，在所述由两隔膜片制成的正极片隔膜袋内分别置入一所述正极片，得到各所述正极片隔膜袋，包括： 9. The method for preparing a laminated lithium-ion battery according to claim 3, wherein one of the positive electrode sheets is respectively placed in the positive electrode sheet separator bag made of two separator sheets to obtain each positive electrode sheet. The positive electrode separator bag includes:

在每正极片的顶面、底面分别放置第一隔膜、第二隔膜，使所述正极片被所述第一隔膜、第二隔膜上下正对覆盖，热封所述第一隔膜、第二隔膜的四个顶角的至少任意两个，形成热封封口，所述第一隔膜、第二隔膜在各所述热封封口处热熔连接，即得所述正极片隔膜袋。 Place a first separator and a second separator on the top and bottom surfaces of each positive electrode sheet respectively, so that the positive electrode sheet is covered by the first separator and the second separator up and down, and heat seal the first separator and the second separator. At least any two of the four top corners form a heat seal, and the first separator and the second separator are hot-melt connected at each of the heat seals to obtain the positive electrode sheet separator bag.

10、根据权利要求 9所述的叠片锂离子电池的制备方法，其特征是，热封所述第一隔膜、第二隔膜的四个顶角的至少任意两个，具体是；热封所述第一隔膜、第二隔膜的四个所述顶角； 10. The method for preparing a laminated lithium-ion battery according to claim 9, wherein at least any two of the four vertex corners of the first separator and the second separator are heat-sealed, specifically: heat-sealing all The four vertex corners of the first diaphragm and the second diaphragm;

或者，热封所述第一隔膜、第二隔膜的任意两个相对的所述顶角。 Alternatively, any two opposite vertex corners of the first separator and the second separator are heat-sealed.

11、根据权利要求 3所述的叠片锂离子电池的制备方法，其特征是，在所述由两隔膜片制成的正极片隔膜袋内分别置入一所述正极片，得到各所述正极片隔膜袋，包括： 11. The method for preparing a laminated lithium-ion battery according to claim 3, wherein one of the positive electrode sheets is respectively placed in the positive electrode sheet separator bag made of two separator sheets to obtain each of the positive electrode sheets. Positive electrode separator bag, including:

在所述正极片的顶面、底面分别放置第一隔膜、第二隔膜，使所述正极片被所述第一隔膜、第二隔膜上下正对覆盖， Place a first separator and a second separator on the top and bottom surfaces of the positive electrode sheet respectively, so that the positive electrode sheet is covered by the first separator and the second separator up and down,

以预定的温度以及压力，面对面热封所述第一隔膜、正极片以及第二隔膜，使所述第一隔膜、正极片以及第二隔膜的表面上下粘合在一起，即得所述正极片隔膜袋。 The first separator, the positive electrode sheet and the second separator are face-to-face heat-sealed at a predetermined temperature and pressure, so that the surfaces of the first separator, the positive electrode sheet and the second separator are bonded together to obtain the positive electrode sheet. Diaphragm bag.

12、根据权利要求 3所述的叠片锂离子电池的制备方法，其特征是，在所述由两隔膜片制成的正极片隔膜袋内分别置入一所述正极片，得到各所述正极片隔膜袋，包括： 12. The method for preparing a laminated lithium-ion battery according to claim 3, wherein one of the positive electrode sheets is respectively placed in the positive electrode sheet separator bag made of two separator sheets to obtain each of the positive electrode sheets. Positive electrode separator bag, including:

沿所述第一隔膜、第二隔膜超出所述正极片的边缘，激光点焊层叠的所述第一隔膜、第二隔膜，使所述第一隔膜、第二隔膜连接在一起，即得所述正极片隔膜袋。 Along the edges of the first separator and the second separator beyond the positive electrode sheet, the laminated first separator and the second separator are laser spot welded to connect the first separator and the second separator together to obtain the result Described positive electrode sheet separator bag.

13、根据权利要求 1至 12之任一所述的叠片锂离子电池的制备方法，其特征是， 13. The method for preparing a laminated lithium-ion battery according to any one of claims 1 to 12, characterized in that:

在所述弧形层叠电芯体内，沿所述弧形层叠电芯体的弧形由内到外方向，所述正极片、负极片的自然长度由短到长变化。 In the arc-shaped laminated battery core body, along the arc shape of the arc-shaped laminated battery core body from the inside to the outside, the natural length of the positive electrode piece and the negative electrode piece changes from short to long.

14、根据权利要求 1至 12之任一所述的叠片锂离子电池的制备方法，其特征是， 14. The method for preparing a laminated lithium-ion battery according to any one of claims 1 to 12, wherein The characteristics are,

各所述第一隔膜、第二隔膜的顶面以及底面分别涂布有聚偏氟乙烯层；使所述层叠电芯体内各隔膜层分别与所述隔膜层相邻的所述正极片、负极片相互粘结在一起，具体是： The top and bottom surfaces of each of the first separator and the second separator are respectively coated with polyvinylidene fluoride layers; each separator layer in the laminated battery core is adjacent to the positive electrode sheet and the negative electrode respectively. The pieces are bonded to each other, specifically:

在所述热压温度下，所述层叠电芯体内的各聚偏氟乙烯层与所述聚偏氟乙烯层相邻的所述正极片、负极片粘结在一起。 At the hot pressing temperature, each polyvinylidene fluoride layer in the laminated battery core body and the positive electrode sheet and negative electrode sheet adjacent to the polyvinylidene fluoride layer are bonded together.

15、根据权利要求 1至 12之任一所述的叠片锂离子电池的制备方法，其特征是， 15. The method for preparing a laminated lithium-ion battery according to any one of claims 1 to 12, characterized in that:

所述弧形支架呈凸起的弧形状，或者呈凹陷的弧形状； The arc-shaped bracket is in a convex arc shape or a concave arc shape;

所述电芯体凹位呈凹陷的弧形，或者呈凸起的弧形。 The concave position of the battery core body is in a concave arc shape or in a convex arc shape.

16、一种权利要求 1至 15之任一所述的叠片锂离子电池的制备方法得到的叠片锂离子电池。 16. A laminated lithium-ion battery obtained by the preparation method of a laminated lithium-ion battery according to any one of claims 1 to 15.

17、一种弧形锂离子电池的铝塑膜封装的方法，其特征是，包括：将弧形层叠电芯体置于所述铝塑膜壳体的电芯体凹位内，所述电芯体凹位的顶面的弧度与所述弧形层叠电芯体的弧度相匹配，使所述弧形层叠电芯体的底面与所述电芯体凹位的顶面面对面贴合， 17. A method for encapsulating arc-shaped lithium-ion batteries with aluminum-plastic films, which is characterized by: placing the arc-shaped laminated battery core body in the recessed position of the battery core body of the aluminum-plastic film casing; The curvature of the top surface of the recessed position of the core body matches the curvature of the arc-shaped laminated electric core body, so that the bottom surface of the arc-shaped laminated electric core body and the top surface of the recessed position of the electric core body are face to face.

将铝塑膜壳覆盖片过盈覆盖在所述弧形层叠电芯体的顶面，所述铝塑膜壳体覆盖片延伸在所述电芯体凹位的第一弧形端部； The aluminum-plastic film shell covering sheet is interference-covered on the top surface of the arc-shaped laminated battery core body, and the aluminum-plastic film shell covering sheet extends at the first arc-shaped end of the recessed position of the battery core body;

采用水平面对面相对的第一上封部、第一下封部热封位于所述第一上封部、第一下封部之间的所述第二弧形端部的铝塑膜，使第二弧形端部处的所述铝塑膜壳体覆盖片与所述电芯体凹位外的铝塑膜热熔密封在一起，所述第二弧形端部为与所述第一弧形端部相对的端部； The aluminum-plastic film at the second arc-shaped end located between the first upper sealing part and the first lower sealing part is heat-sealed by using the first upper sealing part and the first lower sealing part that face each other horizontally, so that the second arc-shaped end part is heat-sealed. The aluminum-plastic film case covering sheet at the two arc-shaped ends is hot-melted and sealed with the aluminum-plastic film outside the recessed position of the battery core body. The second arc-shaped end is connected to the first arc-shaped end. The end opposite the shaped end;

采用第二上封部、第二下封部热封位于所述第二上封部、第二下封部之间的第一弧形侧面，使所述第一弧形侧面处的所述铝塑膜壳体覆盖片与所述电芯体凹位外的铝塑膜热熔密封在一起，所述上封部的底部为第一曲面，所述下封部的顶部分别为第二曲面，所述第一曲面、第二曲面的可相互面对面紧贴配合，所述第一曲面、第二曲面的底部弧形分别与所述弧形层叠电芯体的顶部弧形相同。 The second upper sealing part and the second lower sealing part are used to heat seal the first arc-shaped side surface located between the second upper sealing part and the second lower sealing part, so that the aluminum at the first arc-shaped side surface The plastic film case covering sheet is hot-melt sealed with the aluminum plastic film outside the recess of the battery core body. The bottom of the upper sealing part is a first curved surface, and the tops of the lower sealing part are respectively a second curved surface. The first curved surface and the second curved surface can fit closely together face to face, and the bottom arc shapes of the first curved surface and the second curved surface are respectively the same as the top arc shape of the arc-shaped laminated battery core body.

18、根据权利要求 17所述的弧形锂离子电池的铝塑膜封装的方法，其特征是， 18. The aluminum-plastic film packaging method for arc-shaped lithium-ion batteries according to claim 17, wherein The sign is,

所述第一曲面向下部凸起； The first curved surface is convex downward;

所述第二曲面向下部凹进； The second curved surface is concave downward;

所述弧形层叠电芯体的顶面向下凹进； The top surface of the arc-shaped laminated battery core body is recessed downward;

19、根据权利要求 17或 18所述的弧形锂离子电池的铝塑膜封装的方法，其特征是， 19. The aluminum-plastic film packaging method for arc-shaped lithium-ion batteries according to claim 17 or 18, characterized by:

在步骤：采用第二上封部、第二下封部热封位于所述第二上封部、第二下封部之间的第一弧形侧面之后，还包括： After the step of: using the second upper sealing part and the second lower sealing part to heat seal the first arc-shaped side located between the second upper sealing part and the second lower sealing part, it also includes:

以与所述第一弧形侧面相对的第二弧形侧面开口处为注液口，进行抽真空灌注电解液，使所述弧形层叠电芯体充盈浸泡在所述电解液中； Using the opening of the second arc-shaped side opposite to the first arc-shaped side as a liquid injection port, perform vacuuming and pour electrolyte, so that the arc-shaped laminated battery core body is filled and immersed in the electrolyte;

采用所述第二上封部、第二下封部热封位于所述第二上封部、第二下封部之间的第二弧形侧面外的边缘，形成气囊袋； Use the second upper sealing part and the second lower sealing part to heat seal the outer edge of the second arc-shaped side between the second upper sealing part and the second lower sealing part to form an airbag bag;

化成； to form;

抽真空，采用第二上封部、第二下封部热封位于所述气囊袋内的所述第二弧形侧面，使所述第二弧形侧面处的所述铝塑膜壳体覆盖片与所述电芯体凹位外的铝塑膜热熔密封在一起，即得弧形铝塑膜叠片锂离子电池。 Evacuate, use the second upper sealing part and the second lower sealing part to heat seal the second arc-shaped side located in the air bag, so that the aluminum-plastic film shell at the second arc-shaped side is covered The sheet and the aluminum-plastic film outside the recessed position of the battery core body are hot-melted and sealed together to obtain a curved aluminum-plastic film laminated lithium-ion battery.

20、一种用于锂离子叠片体成型的装置，其特征是，包括： 20. A device for forming lithium ion laminates, characterized by including:

弧形支架，所述弧形支架的顶面呈弧形； An arc-shaped bracket, the top surface of the arc-shaped bracket is arc-shaped;

弧形压制模具，所述弧形压制模具的底部形成有与所述弧形支架顶部弧形相匹配的第二弧形，当所述弧形压制模具覆盖在所述弧形支架顶部时，可与所述顶部支架的顶部面对面接触。 Arc-shaped pressing mold, the bottom of the arc-shaped pressing mold is formed with a second arc that matches the arc shape of the top of the arc-shaped bracket. When the arc-shaped pressing mold covers the top of the arc-shaped bracket, it can Make face-to-face contact with the top of the top bracket.

21、根据权利要求 20所述的用于叠片体成型的装置，其特征是，所述弧形支架的顶面呈凸起的弧形， 21. The device for laminate forming according to claim 20, wherein the top surface of the arc-shaped bracket is in a convex arc shape,

所述弧形压制模具的底面的所述第二弧形为向内凹进的弧形。 The second arc shape of the bottom surface of the arc-shaped pressing mold is an inwardly concave arc shape.

22、根据权利要求 20所述的用于叠片体成型的装置，其特征是，所述弧形支架的顶面呈凹陷的弧形， 22. The device for laminate forming according to claim 20, wherein the top surface of the arc-shaped bracket is in a concave arc shape,

所述弧形压制模具的底面的所述第二弧形为向下凸起的弧形。 The second arc shape of the bottom surface of the arc-shaped pressing mold is a downwardly convex arc shape.

23、一种铝塑膜壳体，其特征是，包括： 23. An aluminum-plastic film housing, characterized by including:

在一铝塑膜上形成有电芯体凹位，所述电芯体凹位的顶面的呈弧形， A recessed position of the battery core body is formed on an aluminum plastic film. The top surface of the recessed position of the battery core body is arc-shaped,

在所述电芯体凹位顶面外延伸的片状的铝塑膜壳体覆盖片， A sheet-shaped aluminum-plastic film case covering sheet extending outside the top surface of the recessed position of the battery core body,

所述铝塑膜壳体覆盖片可覆盖在所述电芯体凹位的顶部。 The aluminum-plastic film case covering sheet can cover the top of the recessed position of the battery core body.

24、根据权利要求 23所述的铝塑膜壳体，其特征是， 24. The aluminum-plastic film housing according to claim 23, characterized in that:

所述电芯体凹位的顶面的呈向上突起的所述弧形；或者，呈向下凹陷的所述弧形。 The top surface of the recessed position of the battery core body has an upwardly protruding arc shape; or, a downwardly concave arc shape.

25、一种叠片锂离子电池，其特征是，包括： 25. A laminated lithium-ion battery, characterized by including:

弧形层叠电芯体，所述弧形层叠电芯体由层叠的自然成型呈弧形的负极片、正极片构成，任一所述正极片、负极片之间分别间隔有一自然成型呈弧形的隔膜层， An arc-shaped laminated battery core body. The arc-shaped laminated battery core body is composed of stacked naturally formed arc-shaped negative electrode sheets and positive electrode sheets. Any one of the positive electrode sheets and negative electrode sheets is separated by a naturally formed arc-shaped electrode. the diaphragm layer,

铝塑膜壳体，在所述铝塑膜壳体上形成有电芯体凹位，所述弧形层叠电芯体限位在所述电芯体凹位内，被所述铝塑膜壳体密封。 Aluminum-plastic film case, a recessed position of the battery core body is formed on the aluminum-plastic film casing, and the arc-shaped laminated battery core body is limited in the recessed position of the battery core body and is covered by the aluminum-plastic film casing. body seal.

26、根据权利要求 25所述的叠片锂离子电池，其特征是， 26. The laminated lithium-ion battery according to claim 25, characterized in that,

各所述隔膜层分别与本所述隔膜层相邻的所述正极片、负极片相互粘结。 Each separator layer is respectively bonded to the positive electrode sheet and the negative electrode sheet adjacent to the separator layer.

27、根据权利要求 26所述的叠片锂离子电池，其特征是， 27. The laminated lithium-ion battery according to claim 26, characterized in that,

在各所述隔膜层的顶面以及底面分别涂布有聚偏氟乙烯层，各所述聚偏氟乙烯层分别与本聚偏氟乙烯层相邻的所述正极片、负极片相互粘结。 A polyvinylidene fluoride layer is coated on the top surface and bottom surface of each separator layer, and each polyvinylidene fluoride layer is bonded to the positive electrode sheet and the negative electrode sheet adjacent to the polyvinylidene fluoride layer. .

28、根据权利要求 25所述的叠片锂离子电池，其特征是， 28. The laminated lithium-ion battery according to claim 25, characterized in that,

沿所述弧形层叠电芯体的弧形由内到外方向，所述正极片、负极片的自然长度由短到长变化。 Along the arc shape of the arc-shaped laminated battery core body from the inside to the outside, the natural length of the positive electrode piece and the negative electrode piece changes from short to long.

29、根据权利要求 25至 28之任一所述的叠片锂离子电池，其特征是，各所述正极片分别限位于各隔膜袋中， 29. The laminated lithium-ion battery according to any one of claims 25 to 28, wherein each positive electrode piece is respectively limited in each separator bag,

第一隔膜、第二隔膜分别正对位于各所述正极片的顶面、底面。 The first separator and the second separator are directly opposite to the top surface and bottom surface of each positive electrode sheet respectively.

30、根据权利要求 29所述的叠片锂离子电池，其特征是， 30. The laminated lithium-ion battery according to claim 29, characterized in that,

各所述正极片分别限位于各隔膜袋中，具体是： Each positive electrode piece is limited to each separator bag, specifically:

在所述第一隔膜、第二隔膜的至少两纵向边缘上分别形成不相连续的至少两个热封封口，所述第一隔膜、第二隔膜在各所述热封封口处热熔连接。 At least two discontinuous heat-seal seals are respectively formed on at least two longitudinal edges of the first separator and the second separator, and the first separator and the second separator are thermally connected at each of the heat-seal seals.

31、根据权利要求 30所述的叠片锂离子电池，其特征是，在所述第一隔膜、第二隔膜的四周边缘上分别形成所述热封封口。 31. The laminated lithium-ion battery according to claim 30, characterized in that, The heat sealing seals are respectively formed on the peripheral edges of the first separator and the second separator.

32、根据权利要求 29所述的叠片锂离子电池，其特征是， 32. The laminated lithium-ion battery according to claim 29, characterized in that,

第一隔膜、第二隔膜分别正对位于各所述正极片的顶面、底面；在所述第一隔膜、第二隔膜的至少一宽度端部上分别形成热封封口，所述第一隔膜、第二隔膜在所述热封封口处热熔连接。 The first separator and the second separator are respectively located directly opposite the top and bottom surfaces of the positive electrode sheets; heat seals are respectively formed on at least one width end of the first separator and the second separator, and the first separator , the second separator is hot-melt connected at the heat-sealing sealing point.

33、根据权利要求 32所述的叠片锂离子电池，其特征是， 33. The laminated lithium-ion battery according to claim 32, characterized in that,

在所述宽度端部上形成不相互连续的至少两个所述封口，或者，在所述宽度端部上形成连续的所述热封封口；或者， Form at least two non-continuous seals on the width end, or form continuous heat seals on the width end; or,

在所述第一隔膜、第二隔膜的第一宽度端部上形成所述热封封口，所述正极片的极耳焊接部在所述第 -宽度端部伸出。 The heat sealing seal is formed on the first width end portion of the first separator and the second separator, and the tab welding portion of the positive electrode sheet protrudes from the first width end portion.

34、根据权利要求 29所述的叠片锂离子电池，其特征是， 34. The laminated lithium-ion battery according to claim 29, characterized in that,

各所述正极片分别位于各隔膜袋中， Each of the positive electrode sheets is located in each separator bag,

在所述第一隔膜、第二隔膜的四个顶角的至少任意两个上分别形成有热封封口，所述第一隔膜、第二隔膜在所述热封封口处热熔连接。 Heat sealing seals are respectively formed on at least any two of the four vertex corners of the first separator and the second separator, and the first separator and the second separator are thermally connected at the heat sealing seals.

35、根据权利要求 34所述的叠片锂离子电池，其特征是， 35. The laminated lithium-ion battery according to claim 34, characterized in that,

在所述第一隔膜、第二隔膜的四个顶角上分别形成有所述热封封口。 The heat sealing seals are respectively formed on the four top corners of the first separator and the second separator.

36、根据权利要求 29所述的叠片锂离子电池，其特征是， 36. The laminated lithium-ion battery according to claim 29, characterized in that,

第一隔膜、第二隔膜分别正对位于各所述正极片的顶面、底面；所述第一隔膜、第二隔膜分别与所述正极片面对面粘合在一起。 The first separator and the second separator are respectively located directly opposite the top surface and the bottom surface of each of the positive electrode sheets; the first separator and the second separator are respectively bonded face-to-face with the positive electrode sheet.

37、根据权利要求 29所述的叠片锂离子电池，其特征是， 37. The laminated lithium-ion battery according to claim 29, characterized in that,

第一隔膜、第二隔膜分别正对位于各所述正极片的顶面、底面；所述第一隔膜、第二隔膜超出所述正极片的边缘激光点焊连接在一起。 The first separator and the second separator are respectively located directly opposite the top surface and the bottom surface of each of the positive electrode sheets; the first separator and the second separator are connected together by laser spot welding beyond the edges of the positive electrode sheet.

38、一种用于铝塑膜封装模具，其特征是，包括上封部、下封部，所述上封部的底部为第一曲面，所述下封部的顶部分别为第二曲面，所述第一曲面、第二曲面可相互面对面紧贴配合。 38. A mold for aluminum-plastic film packaging, characterized in that it includes an upper sealing part and a lower sealing part, the bottom of the upper sealing part is a first curved surface, and the tops of the lower sealing part are respectively second curved surfaces, The first curved surface and the second curved surface can face each other and closely fit together.

39、根据权利要求 38所述的用于铝塑膜封装模具，其特征是，所述第一曲面向下凸起，所述第二曲面向下凹进； 39. The mold for aluminum-plastic film packaging according to claim 38, wherein the first curved surface is convex downward, and the second curved surface is concave downward;

或者， or,

所述第一曲面向上凹进，所述第二曲面向上凸起。 The first curved surface is concave upward, and the second curved surface is convex upward.