WO2019148963A1 - 电池芯、电池以及电池模组 - Google Patents

电池芯、电池以及电池模组 Download PDF

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Publication number
WO2019148963A1
WO2019148963A1 PCT/CN2018/119393 CN2018119393W WO2019148963A1 WO 2019148963 A1 WO2019148963 A1 WO 2019148963A1 CN 2018119393 W CN2018119393 W CN 2018119393W WO 2019148963 A1 WO2019148963 A1 WO 2019148963A1
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WIPO (PCT)
Prior art keywords
current collector
diaphragm
battery
polar
active material
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Application number
PCT/CN2018/119393
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English (en)
French (fr)
Inventor
刘英会
刘伟
顾洪驰
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比亚迪股份有限公司
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Publication of WO2019148963A1 publication Critical patent/WO2019148963A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present disclosure relates to the field of battery manufacturing technology, and in particular, to a battery core, a battery having the battery core, and a battery module having the battery.
  • the Z-stack production process of the lithium ion battery can only perform single-sheet feeding for each Z-stack of the diaphragm due to the single-piece feeding and the action of pulling the diaphragm back and forth, and the time for feeding the single piece is 1.5-2.0S/sheet. Since the diaphragm is subjected to a single feeding every Z stack, the production time of the battery core is the product of the single sheet feeding time and the number of Z stacks, resulting in low production efficiency, resulting in an increase in the cost of the lithium battery.
  • the present disclosure aims to solve at least one of the above technical problems to some extent.
  • an aspect of the present disclosure is to provide a battery cell that is highly efficient in production.
  • Another aspect of the present disclosure is to provide a battery that is highly efficient in production.
  • Another aspect of the present disclosure is to provide a battery module including the above battery.
  • a battery cell comprising: a diaphragm including a first portion, a middle portion, and a second portion that are sequentially connected, the diaphragm being configured to be both the first portion and the second portion a shape wound around the intermediate portion, and the winding direction of the first portion and the second portion are the same; a plurality of first polar members, the first polar member being disposed within the first portion a side surface and arranged along a winding direction of the first portion, the first polar member comprising a first current collector and a first active material disposed on the first current collector; a plurality of second polarity members, The second polar member is disposed on an inner side surface of the second portion and arranged along a winding direction of the second portion, the second polar member includes a second current collector and is disposed at the second a second active material on the current collector, wherein an inner side of the first portion and an inner side of the second portion both face the intermediate portion.
  • the first polar member and the second polar member can be simultaneously fed on the inner sides of the first portion and the second portion, improving production efficiency.
  • the battery core according to an embodiment of the present disclosure may further have the following additional technical features:
  • At least a portion of an outermost layer of the diaphragm is an end of the first portion, and an outer side of the end of the first portion is provided with a second current collector, and an inner side of the second current collector
  • the second active material is coated on both sides of the second active material or the second current collector.
  • At least a portion of an outermost layer of the diaphragm is an end of the second portion, and an outer side of the end of the second portion is provided with a first current collector, the first The inner side of the current collector is coated with a first active material or both sides of the first current collector are coated with a first active material.
  • At least a portion of the outermost layer of the membrane is the end of the first portion, and at least another portion of the outermost layer of the membrane is the end of the second portion;
  • the outer side of the end of the first portion is provided with a second current collector, the inner side of the second current collector is coated with the second active material or both sides of the second current collector are coated with the second active material;
  • the outer side of the end of the second portion is provided with a first current collector, the inner side of the first current collector is coated with a first active material or both sides of the first current collector are coated with a first active material.
  • the first polar member and the second polar member are not disposed on both the outer side and the inner side of the outermost layer of the diaphragm.
  • the outermost layer of the membrane is a layer or a wound multilayer.
  • the outermost layer of the separator is a layer or a wound multi-layer means that the separator which is not provided with the outermost layer of the first polar member and the second polar member may be one layer or a plurality of layers.
  • the outermost layer of the diaphragm is not provided with the first current collector, or the outermost layer of the diaphragm is not provided with the second current collector, or the outermost layer of the diaphragm is not provided with the first The current collector and the second current collector.
  • the outermost layer of the membrane may be the outer side surface of the outermost layer of the membrane, or the inner side surface of the outermost layer of the membrane, or the outer surface of the outermost layer of the membrane and the outermost layer of the membrane. Inner side.
  • the separator which is not provided with the outermost layer of the current collector may be one layer or a plurality of layers.
  • the first portion includes a first segment parallel to the intermediate portion and a first connecting segment connecting the first segment, the second portion including a second segment parallel to the intermediate portion and a connection a second connecting section of the second section.
  • the first polar member is disposed on an inner side of the first segment, and the second polar member is disposed on an inner side of the second segment.
  • the intermediate portion, the first segment, and the second segment are both planar or curved.
  • the end of the diaphragm is fixed by a tape or the end of the diaphragm is fixed by thermocompression bonding, wherein the end of the diaphragm includes the end of the first portion, or the end of the diaphragm includes the second portion
  • the end, or the end of the diaphragm includes the end of the first portion and the end of the second portion.
  • the first polar member includes a plurality of first polar members arranged along a winding direction of the first portion, and the plurality of first polar members are electrically connected to each other
  • the second polar member includes a plurality of second polar members arranged along a winding direction of the second portion, and the plurality of the second polar members are electrically connected to each other.
  • the first polar member has a first conductive portion extending from a side of the diaphragm, and the first conductive portions of the plurality of first polar members are electrically connected to each other, the second polar member a second conductive portion extending from a side of the diaphragm, the second conductive portions of the plurality of second polar members being electrically connected to each other, and the first conductive portion and the second conductive portion Staggered settings.
  • the diaphragm is wound into a film.
  • the battery according to the embodiment of the second aspect of the present disclosure includes the battery core of the above embodiment, and since the production efficiency of the battery cell according to the embodiment of the present disclosure is high, the production efficiency of the battery is high.
  • a battery module according to an embodiment of the third aspect of the present disclosure includes the battery module including the above battery.
  • FIG. 1 is a schematic structural view of a battery cell according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural view of a first electrode member according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural view of a second electrode member according to an embodiment of the present disclosure.
  • FIGS. 4a-4e are schematic views of a membrane winding process of a battery cell according to an embodiment of the present disclosure
  • 5a-5f are schematic views of a manufacturing process of a battery cell according to an embodiment of the present disclosure.
  • the diaphragm 10 The diaphragm 10, the first portion 11, the first segment 111, the first connecting portion 112, the intermediate portion 12, the second portion 13, the second segment 131, the second connecting portion 132,
  • first polarity member 21 a first current collector 211, a first active material 212, a second polarity member 22, a second current collector 221, and a second active material 222,
  • the Z-stack production process of the lithium ion battery results in low production efficiency due to the action of the single piece feeding and the pulling back and forth of the diaphragm.
  • the present disclosure proposes a battery cell 100.
  • a battery cell 100 according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 through 5.
  • the battery cell 100 may generally include a diaphragm 10, a first polarity member 21, and a second polarity member 22.
  • the battery cell 100 is configured by arranging the diaphragm 10 into the first portion 11, the intermediate portion 12, and the second portion 13 which are sequentially connected, and the diaphragm 10 is constructed such that the first portion 11 and the second portion 13 are both surrounded by the middle
  • the shape of the portion 12 is wound, so that the first polar member 21 and the second polar member 22 can be simultaneously fed on the inner sides of the first portion 11 and the second portion 13 during the production process, which improves the production efficiency.
  • the diaphragm 10 includes a first portion 11, a middle portion 12, and a second portion 13 that are sequentially joined, and the diaphragm 10 is configured such that both the first portion 11 and the second portion 13 are wound around the intermediate portion 12, and the first portion 11
  • the winding direction is the same as that of the second portion 13.
  • the first polar member 21 is disposed on the inner side surface of the first portion 11 and arranged along the winding direction of the first portion 11, the first polar member 21 including the first current collector 211 and the first one disposed on the first current collector 211 Active material 212 (shown in Figure 3).
  • Each of the first polarity member 21 and the second polarity member 22 has a plurality of, and the second polarity member 22 is disposed on the inner side surface of the second portion 13 and arranged along the winding direction of the second portion 13, the second polarity
  • the member 22 includes a second current collector 221 and a second active material 222 (shown in FIG. 2) disposed on the second current collector 221, wherein the inner side of the first portion 11 and the inner side of the second portion 13 face the middle Part 12.
  • the right side of the first portion 11 (as shown on the right side of FIG. 1) is provided with a first polarity member 21, and the left side of the first portion 11 (on the left side of FIG. 1) is provided with a second polarity member 22, second
  • the second side of the portion 13 is provided with a second polarity member 22, the left side of the second portion 13 is provided with a first polarity member 21, and the intermediate portion 12 between the first polarity member 21 and the second polarity member 22 is The first portion 11 and the second portion 13 are spaced apart.
  • the first polar member 21 includes a first current collector 211 and a first active material 212
  • the second polar member 22 includes a second current collector 221 and a second active material 222.
  • the first active material 212 and the second active material 222 are separated by the separator 10, and the membrane 10 can prevent relatively large molecules from passing through and allow only a small volume of charged ions to pass, thus, the first activity Ion exchange can be performed between the material 212 and the second active material 222.
  • first portion 11 and the second portion 13 are wound around the intermediate portion 12 in a counterclockwise direction to constitute the diaphragm 10.
  • the first portion 11 rotates counterclockwise around the intermediate portion 12
  • the second portion 13 also rotates counterclockwise around the intermediate portion 12.
  • the left and right sides of the first portion 11 and the second portion 13 are subjected to the upper sheet, that is, the first polar member 21 and the second polar member 22 are attached to the left side of the first portion 11 and the second portion 13 or On the right side, after the upper sheet movement is completed, the rotation is repeated counterclockwise for half a week, and the above operation is repeated until the structural configuration of the battery cell 100 is completed.
  • the present disclosure adopts a process of double-sided sheeting, which can nearly double the production efficiency compared to the single-face material in the related art.
  • the directions of rotation of the first portion 11, the intermediate portion 12 and the second portion 13 are always in the same direction, and are not necessarily limited to counterclockwise.
  • the first portion 11 and the second portion 13 may also be along
  • the diaphragm 10 is wound around the intermediate portion 12 in a clockwise direction.
  • the side of the first portion 11 facing the intermediate portion 12 may be provided with the second polar member 22 And a side facing away from the intermediate portion 12 is provided with a first polar member 21, and a side of the second portion 13 facing the intermediate portion 12 is provided with a first polar member 21 and a side facing away from the intermediate portion 12 is provided with a second pole Sexuality 22.
  • At least a portion of the outermost layer of the diaphragm 10 is the end of the first portion 11, and the outer side of the end of the first portion 11 is provided with a second current collector 221,
  • the inner side of the second current collector 221 is coated with the second active material 222 or both sides of the second current collector 221 are coated with the second active material 222.
  • At least a portion of the outermost layer of the diaphragm 10 is the end of the second portion 13, and the outer side of the end of the second portion 13 is provided with a first current collector 211, the inner side of the first current collector 211 Both sides of the first active material 212 or the first current collector 211 are coated with the first active material 212.
  • At least a portion of the outermost layer of the membrane 10 is the end of the first portion 11, and at least another portion of the outermost layer of the membrane 10 is the end of the second portion 13;
  • the outer side of the end of the first portion 11 is provided a second current collector 221, the inner side of the second current collector 221 is coated with the second active material 222 or both sides of the second current collector 221 are coated with the second active material 222;
  • the second portion 13 The outer side of the tip is provided with a first current collector 211, the inner side of the first current collector 211 is coated with a first active material 212 or both sides of the first current collector are coated with a first active material 212.
  • the outer and inner sides of the outermost layer of the membrane 10 are not provided with the first polar member 21 and the second polar member 22, and the outermost layer of the membrane 10 is a layer or a wound multilayer.
  • the outermost layer of the separator 10 is a layer or a wound multi-layer means that the separator 10 in which the outermost layer of the first polar member 21 and the second polar member 22 is not provided may be one layer or a plurality of layers.
  • the outer side of the outermost layer of the membrane 10 means that the first portion 11 of the outermost membrane is facing away from the surface of the intermediate portion 12, or the outer side of the outermost layer of the membrane 10 is
  • the inner side of the outermost layer of the membrane 10 refers to the surface of the first portion 11 of the outermost membrane facing the intermediate portion 12, or the inner side of the outermost layer of the membrane 10 is Referring to the second portion 13 of the outermost membrane facing the surface of the intermediate portion 12, or the inner side of the outermost layer of the membrane 10 means that the first portion 11 and the second portion 13 of the outermost membrane are oriented toward the middle a portion of the surface;
  • the inner side of the second current collector 221 refers to the surface of the second current collector 221 toward the intermediate portion 12, and the inner side of
  • first polar member 21 or the second polar member 22 located at the outermost layer of the separator 10 may contain only the active material on one side (as shown in FIGS. 1 and 5), or may contain the active material on both sides. It is also possible not to provide the first polarity member 21 or the second polarity member 22.
  • the first polar member 21 located in the inner layer of the diaphragm 10 may be such that both sides of the first polar member 21 contain the first active material 212, and the second polar member 22 located at the inner layer of the diaphragm 10 may be Both sides of the second polar member 22 contain the second active material 222; and the first polar member 21 located at the outermost layer of the diaphragm 10 may be one of the first polar member 21 facing the intermediate portion 12 of the diaphragm 10.
  • the side surface contains the first active material 212, and both sides of the first polar member 21 may contain the first active material 212, and the second polar member 22 located at the outermost layer of the diaphragm 10 may be the second polar member 22.
  • One side of the intermediate portion 12 facing the diaphragm 10 contains the second active material 222, and both sides of the second polar member 21 may contain the second active material 222.
  • the outermost layer of the diaphragm 10 is not provided with any one of the first polar member 21 and the second polar member 22, and only one or more layers of the diaphragm 10 are wound, and the battery separator 10 is The first polar member 21 and the second polar member 22 of the inner layer are wrapped, so that raw materials can be saved and the cost can be reduced.
  • the outermost layer of the diaphragm 10 is not provided with the first current collector 211, or the outermost layer of the diaphragm 10 is not provided with the second current collector 221, or the outermost layer of the diaphragm 10 is not provided with the first current collector 211 and The second current collector 221.
  • the outermost layer of the separator 10 is not provided with the first current collector 211 or the second current collector 221, so that the process can be simplified and the production efficiency can be improved.
  • the separator which is not provided with the outermost layer of the first current collector 211 or the second current collector 221 may be one layer or a plurality of layers.
  • the first portion 11 includes a first segment 111 that is parallel to the intermediate portion 12 and a first connecting segment 112 that connects the first segment 111.
  • the second portion 13 includes a parallel portion to the intermediate portion 12.
  • the second segment 131 and the second connecting segment 132 connecting the second segment 131.
  • both ends of the first connecting section 112 are connected to the first section 111
  • both ends of the second connecting section 132 are connected to the second section 131, such that the first section 11 is connected by the first section 111 and the first connecting section 112 as a whole.
  • the second portion 13 is connected by the second segment 131 and the second connecting portion 132 as a whole, and the first segment 111, the second segment 131 and the intermediate portion 12 are parallel to each other, and the space utilization rate is high.
  • the first polar member 21 is disposed on the inner side of the first segment 111 and the second polar member 22 is disposed on the inner side of the second segment 131.
  • the inner side of the first section 111 refers to a side surface of the first section 111 toward the intermediate portion 12
  • the inner side of the second section 131 refers to a side surface of the second section 131 toward the intermediate portion 12.
  • the intermediate portion 12, the first segment 111, and the second segment 131 are both planar or curved. Taking the intermediate portion 12, the first segment 111, and the second segment 131 as planar examples, it is easy to understand that the first polar member 21 and the second portion are disposed on the surfaces of the intermediate portion 12, the first segment 111, and the second segment 131.
  • the polar member 22 is also planar, and the upper sheet is simple and easy to implement.
  • the planar shape of the first polar member 21 and the second polar member 22 may be the same as an "L" shape, a "U" shape, or the like.
  • the intermediate portion 12, the first segment 111, and the second segment 131 are not limited to being planar or curved, but may be other regular or irregular shapes, such as zigzag, wavy, and the like.
  • the end of the diaphragm 10 is fixed by a tape 30 or the end of the diaphragm 10 is fixed by thermocompression bonding.
  • the bonding method of the adhesive tape 30 and the thermocompression bonding and the separator 10 is bonding, and the connection is simple and easy to realize, and the sheet is connected by bonding, and is stable and not easy to fall off.
  • the diaphragm 10 covered by the adhesive tape 30 avoids the phenomenon that the burr pierces the diaphragm 10 and causes short circuit of the battery, and the diaphragm 10 at the initial end is easily affected by the cutting and the folding of the needle.
  • the adhesive tape 30 can isolate the positive and negative poles of the front end to avoid causing positive The negative contact is shorted.
  • the end of the diaphragm 10 includes the end of the first portion 11, or the end of the diaphragm 10 includes the end of the second portion 13, or the end of the diaphragm 10 includes the end of the first portion 11 and the end of the second portion 13.
  • the first polar member 21 includes a plurality of first polar members arranged along the winding direction of the first portion 11, and the plurality of first polar members 21 are electrically connected to each other
  • second The polar member 22 includes a plurality of second polar members arranged in the winding direction of the second portion 13, and the plurality of second polar members 22 are electrically conducted to each other.
  • ion exchange is performed between the plurality of first electrode sheets and the plurality of second electrode sheets to generate a current. Since the plurality of first electrode sheets are electrically connected to each other, the plurality of second electrode sheets are electrically connected to each other, so that the second electrode sheets can be electrically connected to each other.
  • the currents are concentrated to form a larger current.
  • first polar member 21 has a first conductive portion (not shown) extending from a side of the diaphragm 10, and the first conductive portions of the plurality of first polar members 21 are electrically connected to each other
  • the bipolar member 22 has a second conductive portion (not shown) extending from a side of the diaphragm 10, and the second conductive portions of the plurality of second polar members 22 are electrically connected to each other, and the first The conductive portion and the second conductive portion are staggered.
  • a battery (not shown) according to an embodiment of the present disclosure includes the battery cell 100 of the above-described embodiment, and since the production efficiency of the battery cell 100 according to an embodiment of the present disclosure is high, the production efficiency of the battery is high.
  • the device in addition to the production of the battery core 100, the device can also derive various battery cell small units, which can be arranged and combined according to the design of the battery, and finally combined into a complete battery core, wherein the battery cell unit comprises The number of polar parts is ⁇ 2.
  • the membrane 10 is wound from a sheet of film. It can be understood that the battery core 100 wound by a single film is simple in production, and does not require processes such as alignment and clamping, thereby further improving production efficiency.
  • a vehicle according to an embodiment of the present disclosure includes a vehicle body and a battery, the battery being provided on the vehicle body, and the battery is the battery described above.
  • the battery module includes at least one of the above batteries. Since the above battery is simple in production and high in production efficiency, the battery module having the above battery has high production efficiency.
  • a vehicle according to an embodiment of the present disclosure includes a vehicle body and a battery module, the battery module is disposed on the vehicle body, and the battery module is the battery module described above. Since the above-described battery module has high production efficiency, the production cost of the vehicle having the above battery module is low.
  • An electronic device including the battery of the above embodiment, is highly efficient in production efficiency of the battery according to an embodiment of the present disclosure. Since the production efficiency of the battery in the electronic device is high, the production cost of the electronic device can be reduced.
  • the electronic device may specifically be a mobile phone, a notebook computer, an ipad, or the like.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
  • the first feature “above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly above and above the second feature, or merely the first feature level being less than the second feature.

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Abstract

一种电池芯(100)、电池和电池模组，电池芯(100)包括：隔膜(10)，隔膜(10)包括依次相接的第一部分(11)、中间部分(12)和第二部分(13)，隔膜(10)构造成第一部分(11)和第二部分(13)均环绕中间部分(12)卷绕的形状，且第一部分(11)和第二部分(13)的卷绕方向相同；多个第一极性件(21)，第一极性件(21)设在第一部分(11)的内侧面；多个第二极性件(22)，第二极性件(22)设在第二部分(13)的内侧面，第一部分(11)的内侧面和第二部分(13)的内侧面均面向中间部分(12)。

Description

电池芯、电池以及电池模组
相关申请的交叉引用
本申请要求于2018年2月5日提交中国专利局、申请号为201820210444.1、申请名称为“电池芯、电池、电池模组、车辆和电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及电池制造技术领域，特别涉及一种电池芯、具有该电池芯的电池以及具有该电池的电池模组。
背景技术
相关技术中，锂离子电池Z叠生产工艺由于单片上料及来回拉隔膜的动作，隔膜的每一次Z叠都只能进行单片上料，单片上料的时间为1.5-2.0S/sheet，由于隔膜每一次Z叠都进行单次上料，电池芯的制作时间为单片上料时间与Z叠次数的乘积，导致生产效率低，从而导致锂电池的成本升高。
实用新型内容
本公开旨在至少在一定程度上解决上述技术问题之一。
为此，本公开一方面在于提出一种电池芯，该电池芯的生产效率高。
本公开另一方面在于提出一种电池，所述电池的生产效率高。
本公开另一方面在于提出一种电池模组，该电池模组包括上述电池。
根据本公开第一方面实施例的电池芯，包括：隔膜，所述隔膜包括依次相接的第一部分、中间部分和第二部分，所述隔膜构造成所述第一部分和所述第二部分均环绕所述中间部分卷绕的形状，且所述第一部分和所述第二部分的卷绕方向相同；多个第一极性件，所述第一极性件设在所述第一部分的内侧面并沿所述第一部分的卷绕方向排布，所述第一极性件包括第一集流体和设在所述第一集流体上的第一活性材料；多个第二极性件，所述第二极性件设在所述第二部分的内侧面并沿所述第二部分的卷绕方向排布，所述第二极性件包括第二集流体和设在所述第二集流体上的第二活性材料，其中，所述第一部分的内侧面和所述第二部分的内侧面均面向所述中间部分。
根据本公开实施例的电池芯，在生产过程中，第一极性件和第二极性件可以在第一部分和第二部分的内侧面同时上料，提高了生产效率。
另外，根据本公开实施例的电池芯，还可以具有如下附加的技术特征：
根据本公开的一个实施例，隔膜的最外层的至少一部分为所述第一部分的末端，且所 述第一部分的末端的外侧面设有第二集流体，所述第二集流体的内侧面涂覆第二活性材料或者所述第二集流体的双面均涂覆第二活性材料。
根据本公开的另外一些实施例，所述隔膜的最外层的至少一部分为所述第二部分的末端，且所述第二部分的末端的外侧面设有第一集流体，所述第一集流体的内侧面涂覆第一活性材料或者所述第一集流体的双面涂覆第一活性材料。
根据本公开的另一些实施例，隔膜的最外层的至少一部分为所述第一部分的末端，且隔膜的最外层的至少另一部分为所述第二部分的末端；
所述第一部分的末端的外侧面设有第二集流体，所述第二集流体的内侧面涂覆第二活性材料或者所述第二集流体的双面均涂覆第二活性材料；
所述第二部分的末端的外侧面设有第一集流体，所述第一集流体的内侧面涂覆第一活性材料或者所述第一集流体的双面涂覆第一活性材料。
根据本公开的另外一些实施例，所述隔膜的最外层的外侧面和内侧面均未设置所述第一极性件和所述第二极性件。
根据本公开的一些实施例，所述隔膜的最外层为一层或卷绕的多层。所述隔膜的最外层为一层或卷绕的多层是指，不设置第一极性件和第二极性件的最外层的隔膜可以是一层，也可以是多层。
根据本公开的一个些实施例，所述隔膜的最外层未设置第一集流体，或者所述隔膜的最外层未设置第二集流体，或者所述隔膜的最外层未设置第一集流体和第二集流体。其中，所述隔膜的最外层可以是隔膜的最外层的外侧面，也可以是隔膜的最外层的内侧面，还可以是隔膜的最外层的外侧面和隔膜的最外层的内侧面。此处，不设置集流体的最外层的隔膜可以是一层，也可以是多层。
根据本公开的一个实施例，所述第一部分包括与中间部分平行的第一段和连接所述第一段的第一连接段，所述第二部分包括与中间部分平行的第二段和连接所述第二段的第二连接段。
根据本公开的一个实施例，所述第一极性件设置于所述第一段的内侧面上，所述第二极性件设置于所述第二段的内侧面上。
根据本公开的一个实施例，所述中间部分、所述第一段以及所述第二段均为平面状或曲面状等。
根据本公开的一个实施例，所述隔膜的末端通过胶布固定或所述隔膜的末端通过热压粘合固定，其中，隔膜的末端包括第一部分的末端，或者所述隔膜的末端包括第二部分的末端，或者所述隔膜的末端包括第一部分的末端和第二部分的末端。
所述第一极性件包括沿所述第一部分的卷绕方向排布的多个第一极性件，且多个所述 第一极性件相互电导通，所述第二极性件包括沿所述第二部分的卷绕方向排布的多个第二极性件，且多个所述第二极性件相互电导通。
所述第一极性件具有伸出所述隔膜侧边的第一导电部，多个所述第一极性件的所述第一导电部之间相互电连接，所述第二极性件具有伸出所述隔膜侧边的第二导电部，多个所述第二极性件的所述第二导电部之间相互电连接，且所述第一导电部和所述第二导电部错开设置。
根据本公开的一个实施例，隔膜为一张膜卷绕而成。
根据本公开第二方面实施例的电池包括上述实施例的电池芯，由于根据本公开实施例的电池芯的生产效率高，因此，所述电池的生产效率高。
根据本公开第三方面实施例的电池模组，包括：所述电池模组包括上述电池。
本公开的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本公开一个实施例的电池芯的结构示意图；
图2是根据本公开一个实施例的第一电极件的结构示意图；
图3是根据本公开一个实施例的第二电极件的结构示意图；
图4a-图4e是根据本公开一个实施例的电池芯的隔膜卷绕过程示意图；
图5a-图5f是根据本公开一个实施例的电池芯的制作过程示意图。
附图标记：
电池芯100，
隔膜10，第一部分11，第一段111，第一连接段112，中间部分12，第二部分13，第二段131，第二连接段132，
第一极性件21，第一集流体211，第一活性材料212，第二极性件22，第二集流体221，第二活性材料222，
胶布30。
具体实施方式
相关技术中，锂离子电池Z叠生产工艺由于单片上料及来回拉隔膜的动作，导致生产 效率低。
为了解决上述问题，本公开提出了一种电池芯100。
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本公开，而不能理解为对本公开的限制。
下面参照图1至图5描述根据本公开实施例的电池芯100。
如图1所示，该电池芯100大体可以包括：隔膜10、第一极性件21和第二极性件22。
根据本公开实施例的电池芯100，通过将隔膜10设置成依次相连的第一部分11、中间部分12和第二部分13，且隔膜10构造成所述第一部分11和第二部分13均环绕中间部分12卷绕的形状，这样，在生产过程中，第一极性件21和第二极性件22可以在第一部分11和第二部分13的内侧面同时上料，提高了生产效率。
具体而言，隔膜10包括依次相接的第一部分11、中间部分12和第二部分13，隔膜10构造成第一部分11和第二部分13均环绕中间部分12卷绕的形状，且第一部分11和第二部分13的卷绕方向相同。第一极性件21设在第一部分11的内侧面并沿第一部分11的卷绕方向排布，第一极性件21包括第一集流体211和设在第一集流体211上的第一活性材料212(如图3所示)。第一极性件21和第二极性件22均具有多个，第二极性件22设在第二部分13的内侧面并沿第二部分13的卷绕方向排布，第二极性件22包括第二集流体221和设在第二集流体221上的第二活性材料222(如图2所示)，其中，第一部分11的内侧面和第二部分13的内侧面均面向中间部分12。
换句话说，第一部分11的右侧(如图1右侧)设有第一极性件21，第一部分11的左侧(如图1左侧)设有第二极性件22，第二部分13的右侧设有第二极性件22，第二部分13的左侧设有第一极性件21，第一极性件21和第二极性件22之间由中间部分12、第一部分11和第二部分13间隔开。其中，第一极性件21包括第一集流体211和第一活性材料212，第二极性件22包括第二集流体221和第二活性材料222。举例来说，可以是第一活性材料212和第二活性材料222之间由隔膜10间隔开，隔膜10可以阻止体积比较大的分子通过而只允许小体积的带电离子通过，因此，第一活性材料212和第二活性材料222之间可以进行离子交换。
另外，第一部分11和第二部分13沿逆时针方向环绕中间部分12卷绕构成隔膜10，第一部分11环绕中间部分12逆时针旋转时，第二部分13也环绕中间部分12作逆时针旋转，旋转半周后，对第一部分11和第二部分13的左右两侧进行上片，也即将第一极性件21和第二极性件22安装于第一部分11和第二部分13的左侧或右侧，上片动作完成后，再次逆时针旋转半周，重复以上动作，直至电池芯100结构构造完成。这样，相较于相关 技术中的单面上料，本公开采用双面上片的工艺，可以将生产效率提升近一倍。当然，第一部分11、中间部分12和第二部分13的旋转方向始终同向即可，并非一定限制为逆时针，在本公开的一些实施例中，第一部分11和第二部分13也可沿顺时针方向环绕中间部分12卷绕构成隔膜10。
可以理解，上述实施例仅是示意性的，并不能理解为对本公开保护范围的限制，根据蓄电池的工作原理，例如，第一部分11面向中间部分12的一侧可以设有第二极性件22且背离中间部分12的一侧设有第一极性件21，而第二部分13面向中间部分12的一侧设有第一极性件21且背离中间部分12的一侧设有第二极性件22。
一些实施例中，如图1结合图5所示，隔膜10的最外层的至少一部分为第一部分11的末端，且第一部分11的末端的外侧面设有第二集流体221，所述第二集流体221的内侧面涂覆第二活性材料222或者所述第二集流体221的双面均涂覆第二活性材料222。
一些实施例中，隔膜10的最外层的至少一部分为第二部分13的末端，且第二部分13的末端的外侧面设有第一集流体211，所述第一集流体211的内侧面涂覆第一活性材料212或者所述第一集流体211的双面均涂覆第一活性材料212的。
一些实施例中，隔膜10的最外层的至少一部分为第一部分11的末端，且隔膜10的最外层的至少另一部分为第二部分13的末端；第一部分11的末端的外侧面设有第二集流体221，所述第二集流体221的内侧面涂覆第二活性材料222或者所述第二集流体221的双面均涂覆第二活性材料222；所述第二部分13的末端的外侧面设有第一集流体211，所述第一集流体211的内侧面涂覆第一活性材料212或者所述第一集流体的双面涂覆第一活性材料212。
一些实施例中，隔膜10的最外层的外侧面和内侧面均未设置第一极性件21和第二极性件22，且隔膜10的最外层为一层或卷绕的多层。隔膜10的最外层为一层或卷绕的多层是指未设置第一极性件21和第二极性件22的最外层的隔膜10可以为一层也可以为多层。
在本公开中，所述隔膜10的最外层的外侧面是指最外层的隔膜的第一部分11背离所述中间部分12的表面，或者所述隔膜10的最外层的外侧面是指最外层的隔膜的第二部分13背离所述中间部分12的表面，或者所述隔膜10的最外层的外侧面是指最外层的隔膜的第一部分11和第二部分13背离所述中间部分12的表面；所述隔膜10的最外层的内侧面是指最外层的隔膜的第一部分11朝向所述中间部分12的表面，或者所述隔膜10的最外层的内侧面是指最外层的隔膜的第二部分13朝向所述中间部分12的表面，或者所述隔膜10的最外层的内侧面是指最外层的隔膜的第一部分11和第二部分13朝向中间部分的表面；所述第二集流体221的内侧面是指第二集流体221朝向所述中间部分12的表面，所述第一集流体221的内侧面是指第一集流体朝向所述中间部分12的表面。
也就是说，位于隔膜10最外层的第一极性件21或第二极性件22可以仅单面含有活性材料(如图1和图5所示)，也可双面均含活性材料，还可以不设置第一极性件21或第二极性件22。换言之，位于隔膜10的内层的第一极性件21可以是第一极性件21的两侧面均含有第一活性材料212，位于隔膜10的内层的与第二极性件22可以是第二极性件22的两侧面均含有第二活性材料222；而位于隔膜10的最外层的第一极性件21可以是第一极性件21的朝向隔膜10的中间部分12的一侧面含有第一活性材料212，也可以是第一极性件21的两侧面均含有第一活性材料212，位于隔膜10的最外层的第二极性件22可以是第二极性件22的朝向隔膜10的中间部分12的一侧面含有第二活性材料222，也可以是第二极性件21的两侧面均含有第二活性材料222。
在本公开的另外一些实施例中，隔膜10的最外层不设置第一极性件21和第二极性件22的任意一个，只需缠绕一层或者多层隔膜10，将电池隔膜10的内层的第一极性件21和第二极性件22包裹，这样，可以节约原材料，降低成本。另一些实施例中，隔膜10的最外层未设置第一集流体211，或者隔膜10的最外层未设置第二集流体221，或者隔膜10的最外层未设置第一集流体211和第二集流体221。也即隔膜10的最外层不设置第一集流体211或第二集流体221，这样，可以简化工序，提高生产效率。其中，不设置第一集流体211或第二集流体221的最外层的隔膜可以是一层，也可以是多层。
一些可选实施例中，如图4所示，第一部分11包括与中间部分12平行的第一段111和连接第一段111的第一连接段112，第二部分13包括与中间部分12平行的第二段131和连接第二段131的第二连接段132。换言之，第一连接段112的两端连接第一段111，第二连接段132的两端连接第二段131，这样，第一部分11由第一段111和第一连接段112连接为一个整体，第二部分13由第二段131和第二连接段132连接为一个整体，且第一段111、第二段131与中间部分12相互平行，空间利用率高。
一些具体实施例中，第一极性件21设置于第一段111的内侧面上，第二极性件22设置于第二段131的内侧面上。这样，第一极性件21与第二极性件22被分隔开，可以实现离子交换。其中，第一段111的内侧面是指第一段111朝向中间部分12的一侧表面，第二段131的内侧面是指第二段131朝向中间部分12的一侧表面。
优选地，中间部分12、第一段111以及第二段131均为平面状或曲面状等。以中间部分12、第一段111以及第二段131均为平面状为例，容易理解，设置于中间部分12、第一段111和第二段131表面的第一极性件21和第二极性件22也为平面状，上片简单，容易实现。其中，第一极性件21和第二极性件22的平面形状相同可以为“L”型、“U”型或其它形状。当然，可以理解的是，中间部分12、第一段111以及第二段131并不限于为平面状或曲面状，也可为其它规则或不规则形状，例如锯齿形、波浪形等。
可选地，如图1和图5所示，隔膜10的末端通过胶布30固定或隔膜10的末端通过热压粘合固定。胶布30和热压粘合与隔膜10的连接方式为粘接，连接简单容易实现，片材采用粘接的方式连接，稳定不易脱落。被胶布30覆盖的隔膜10避免了毛刺刺穿隔膜10造成电池短路的现象，且起始端的隔膜10易受裁切、卷针影响出现折叠现象，胶布30可以隔离前端的正负极避免造成正负极接触短路。其中，隔膜10的末端包括第一部分11的末端，或者所述隔膜10的末端包括第二部分13的末端，或者所述隔膜10的末端包括第一部分11的末端和第二部分13的末端。
具体地，如图1所示，第一极性件21包括沿第一部分11的卷绕方向排布的多个第一极性件，且多个第一极性件21相互电导通，第二极性件22包括沿第二部分13的卷绕方向排布的多多个第二极性件，且多个第二极性件22相互电导通。这样，多片第一电极片与多片第二电极片之间进行离子交换从而产生电流，由于多个第一电极片相互电导通，多个第二电极片相互电导通,这样，可以将产生的电流聚集起来，从而形成较大的电流。
进一步地，第一极性件21具有伸出隔膜10侧边的第一导电部(图未示出)，多个第一极性件21的所述第一导电部之间相互电连接，第二极性件22具有伸出隔膜10侧边的第二导电部(图未示出)，多个第二极性件22的所述第二导电部之间相互电连接，且所述第一导电部和所述第二导电部错开设置。第一导电部和第二导电部之间不进行离子交换，相互电连接的第一导电部和相互电连接的第二导电部起到汇集电流的作用，第一导电部与第二导电部可以与电池的正负极电连接，从而产生较大的电流输出。
根据本公开实施例的电池(图未示出)包括上述实施例的电池芯100，由于根据本公开实施例的电池芯100的生产效率高，因此，所述电池的生产效率高。
此外，除了生产电池芯100，本装置还可以衍生出各种电池芯小单元，这些电池芯小单元可以根据电池的设计进行排列组合，最终组合成完整的电池芯，其中，电池芯小单元包含的极性件数量≥2。
一些优选实施例中，隔膜10为一张膜卷绕而成。可以理解的是，由一张膜卷绕而成的电池芯100的生产简单，无需对齐、夹紧等工序，进一步提高了生产效率。
相对而言，相关技术中存在采用了两张或多张膜片卷绕成型电池芯的实施方案，其中，在电池芯卷绕之前，多张膜片的起始端之间会设置极性材料，而多张膜片、极性材料需要对齐并夹紧再进行卷绕，极大地影响了电池芯的成型效率。
根据本公开实施例的车辆包括车体和电池，所述电池设于所述车体上，所述电池为上述的电池。
根据本公开实施例的电池模组，所述电池模组包括至少一个上述的电池。由于上述电池的生产简单，生产效率高，因此，具有上述电池的电池模组的生产效率高。
根据本公开实施例的车辆包括车体和电池模组，所述电池模组设于所述车体上，所述电池模组为上述的电池模组。由于上述电池模组的生产效率高，因此，具有上述电池模组的车辆的生产成本低。
根据本公开实施例的电子设备，包括上述实施例的电池，由于根据本公开实施例的电池的生产效率高，因此，所述电子设备的生产效率高。由于电子设备中的电池的生产效率高，因此，可以减少所述电子设备的生产成本。其中，电子设备具体的可以为手机、笔记本电脑、ipad等。
对于电池芯100、电池以及用于制作电池芯100的装置的其他构成以及操作属于本领域普通技术人员所理解并容易获得的，在此不再进行赘述。
在本公开的描述中，需要理解的是，术语“上”、“下”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
在本公开中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度小于第二特征。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管上面已经示出和描述了本公开的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本公开的限制，本领域的普通技术人员在不脱离本公开的原理和宗旨的情况下在本公开的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (16)

  1. 一种电池芯，其特征在于，包括：
    隔膜，所述隔膜包括依次相接的第一部分、中间部分和第二部分，所述隔膜构造成所述第一部分和所述第二部分均环绕所述中间部分卷绕的形状，且所述第一部分和所述第二部分的卷绕方向相同；
    多个第一极性件，所述第一极性件设在所述第一部分的内侧面并沿所述第一部分的卷绕方向排布，所述第一极性件包括第一集流体和设在所述第一集流体上的第一活性材料；
    多个第二极性件，所述第二极性件设在所述第二部分的内侧面并沿所述第二部分的卷绕方向排布，所述第二极性件包括第二集流体和设在所述第二集流体上的第二活性材料，
    其中，所述第一部分的内侧面和所述第二部分的内侧面均面向所述中间部分。
  2. 根据权利要求1所述的电池芯，其特征在于，隔膜的最外层的至少一部分为所述第一部分的末端，且所述第一部分的末端的外侧面设有第二集流体，所述第二集流体的内侧面涂覆第二活性材料或者所述第二集流体的双面均涂覆第二活性材料。
  3. 根据权利要求1所述的电池芯，其特征在于，隔膜的最外层的至少一部分为所述第二部分的末端，且所述第二部分的末端的外侧面设有第一集流体，所述第一集流体的内侧面涂覆第一活性材料或者所述第一集流体的双面涂覆第一活性材料。
  4. 根据权利要求1所述的电池芯，其特征在于，隔膜的最外层的至少一部分为所述第一部分的末端，且隔膜的最外层的至少另一部分为所述第二部分的末端；
    所述第一部分的末端的外侧面设有第二集流体，所述第二集流体的内侧面涂覆第二活性材料或者所述第二集流体的双面均涂覆第二活性材料；
    所述第二部分的末端的外侧面设有第一集流体，所述第一集流体的内侧面涂覆第一活性材料或者所述第一集流体的双面涂覆第一活性材料。
  5. 根据权利要求2-4任意一项所述的电池芯，其特征在于，所述隔膜的最外层的外侧面和内侧面均未设置所述第一极性件和所述第二极性件。
  6. 根据权利要求2-5任意一项所述的电池芯，其特征在于，所述隔膜的最外层未设置第一集流体，或者所述隔膜的最外层未设置第二集流体，或者所述隔膜的最外层未设置第一集流体和第二集流体。
  7. 根据权利要求2-6任意一项所述的电池芯，其特征在于，所述隔膜的最外层为一层或卷绕的多层。
  8. 根据权利要求1-7任意一项所述的电池芯，其特征在于，所述第一部分包括与中间部分平行的第一段和连接所述第一段的第一连接段，所述第二部分包括与中间部分平行的第二段和连接所述第二段的第二连接段。
  9. 根据权利要求8所述的电池芯，其特征在于，所述第一极性件设置于所述第一段的内侧面上，所述第二极性件设置于所述第二段的内侧面上。
  10. 根据权利要求8-9任意一项所述的电池芯，其特征在于，所述中间部分、所述第一段以及所述第二段均为平面状或曲面状等。
  11. 根据权利要求1-10中任意一项所述的电池芯，其特征在于，所述隔膜的末端通过胶布固定或所述隔膜的末端通过热压粘合固定，其中，隔膜的末端包括第一部分的末端，或者所述隔膜的末端包括第二部分的末端，或者所述隔膜的末端包括第一部分的末端和第二部分的末端。
  12. 根据权利要求1-11中任一项所述的电池芯，其特征在于，所述第一极性件包括沿所述第一部分的卷绕方向排布的多个第一极性件，且多个所述第一极性件相互电导通，所述第二极性件包括沿所述第二部分的卷绕方向排布的多个第二极性件，且多个所述第二极性件相互电导通。
  13. 根据权利要求1-12所述的电池芯，其特征在于，所述第一极性件具有伸出所述隔膜侧边的第一导电部，多个所述第一导电部之间相互电连接，所述第二极性件具有伸出所述隔膜侧边的第二导电部，多个所述第二导电部之间相互电连接，且所述第一导电部和所述第二导电部错开设置。
  14. 根据权利要求1-13任意一项所述的电池芯，其特征在于，所述隔膜为一张膜卷绕而成。
  15. 一种电池，其特征在于，包括根据权利要求1-14中任一项所述的电池芯。
  16. 一种电池模组，其特征在于，所述电池模组包括至少一个根据权利要求15所述的电池。
PCT/CN2018/119393 2018-02-05 2018-12-05 电池芯、电池以及电池模组 WO2019148963A1 (zh)

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