WO2018095170A1 - 一种二次电池电芯 - Google Patents

一种二次电池电芯 Download PDF

Info

Publication number
WO2018095170A1
WO2018095170A1 PCT/CN2017/107063 CN2017107063W WO2018095170A1 WO 2018095170 A1 WO2018095170 A1 WO 2018095170A1 CN 2017107063 W CN2017107063 W CN 2017107063W WO 2018095170 A1 WO2018095170 A1 WO 2018095170A1
Authority
WO
WIPO (PCT)
Prior art keywords
piece
pole
tab
cell
tabs
Prior art date
Application number
PCT/CN2017/107063
Other languages
English (en)
French (fr)
Inventor
肖良针
曾巧
Original Assignee
东莞新能源科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 东莞新能源科技有限公司 filed Critical 东莞新能源科技有限公司
Publication of WO2018095170A1 publication Critical patent/WO2018095170A1/zh
Priority to US16/420,197 priority Critical patent/US20190280280A1/en

Links

Images

Classifications

    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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 application relates to the field of secondary batteries, and in particular to a secondary battery cell.
  • the battery has higher and higher requirements on the rate performance, and has higher requirements for the discharge platform.
  • the battery structure design can also pass the multi-pole ear.
  • the structure reduces the impedance of the battery and improves the performance of the battery.
  • the prior art multi-pole winding structure of the ear ear transfer adopts a secondary bending pole, which occupies more head space and reduces the energy density of the battery.
  • the object of the present invention is to propose a secondary battery cell.
  • the present application relates to a secondary battery cell including a first adapter piece, a second adapter piece, and a battery core, the battery core including a first pole piece, a second pole piece, a first tab, and a second pole
  • the direction parallel to the first pole piece is L
  • the two end points in the thickness direction of the battery core are respectively T1 and T3
  • at least two first pole pieces are disposed respectively.
  • first tab a position of the first tab that is furthest from T1 or T3 is T2, all of the first tabs are stacked to form a first multi-pole structure, and the first turn The tabs are connected, the first multi-pole structure and the first adapter piece forming a first adapter member; and in the L direction, at most one layer of the first adapter member.
  • all of the first tabs are located between the T1 and the T2 in the thickness direction of the battery, and have at most one layer of the first adapter member in the L direction.
  • the first multi-pole structure is formed by all of the first tabs bent away from the center of the cell, the first tab and the first bent toward the center of the cell A multi-pole structure is connected.
  • the first multi-pole structure is formed by all of the first tabs bent toward the center of the battery core, and the first adapter piece is bent away from the center of the battery core A multi-pole structure is connected.
  • all of the first tabs are located between the T1 and the T2 in the thickness direction of the battery, and the bending points of the first multi-pole structure and all of the first tabs are Located between the T1 and the T2 in the thickness direction of the cell.
  • the first tab piece and the second tab piece are relatively flush.
  • all of the first tabs are located between the T1 and the T2 in the thickness direction of the battery, and the connection point of the first adapter piece and the first multi-pole structure is a first connection site, the first connection site partially overlapping or not overlapping with all of the first tabs in the L direction.
  • the first tab piece and the second tab piece are relatively flush.
  • the second tab is disposed in the same manner as the first tab, the second tab is disposed the same as the first tab, and the first tab and the first tab The two poles do not overlap.
  • the battery core is a wound battery core, a laminated battery core or a wound laminated hybrid battery core.
  • the first pole piece is a positive pole piece, and the second pole piece is a negative pole piece; or the first pole piece is a negative pole piece, and the second pole piece is a positive pole piece.
  • the technical solution of the present application can effectively reduce the waste of the head space of the existing ear bend, and is more stable from the bending effect, thereby improving the energy density of the battery.
  • FIG. 1 is a schematic view of a secondary battery in the prior art
  • FIG. 2 is a schematic diagram of a secondary battery in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a secondary battery in an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a secondary battery in an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a secondary battery in an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a secondary battery in an embodiment of the present application.
  • FIG. 7 is a schematic view of a wound type electric core in an embodiment of the present application.
  • FIG. 8 is a schematic view of a laminated battery according to an embodiment of the present application.
  • L-L is a direction parallel to the first pole piece
  • T-T is the thickness direction of the cell.
  • FIG. 1 A schematic diagram of a secondary battery of a conventional winding structure is shown in FIG. 1.
  • the two end points in the thickness direction of the battery cell ie, the TT direction
  • T1 and T3 respectively, and one of the poles of each current collector is drawn.
  • T2 The position of one of the first tabs farthest from T1
  • T2 The position of one of the first tabs farthest from T1
  • T2 the first tab 22 and the second tab are both drawn between T1 and T2 in the thickness direction of the battery.
  • the first adapter member is bent twice on one side of the battery, thereby occupying a large space in the L direction.
  • the specific soldering method is: the first pole piece 22 is disposed between the first pole pieces 21 between T1 and T2 in the thickness direction of the battery core, and all the first poles 22 are bent and extended toward the center of the battery core, neatly arranged. Stacking together; firstly, a plurality of first tabs 22 are pre-welded together, and then the tail is not trimmed to form a first multi-pole structure 23, and then the first adapter piece 1 is adapter-welded, first The multi-pole structure 23 and the first adapter piece 1 form a first adapter member; after welding, the first adapter member is bent on the other side in the thickness direction of the battery core, and is led out along the center of the battery core. An adapter piece 1 is thus rushed with the battery aluminum plastic film The double pit design matches. In this embodiment, there are two layers of first adapter members in the L direction of the battery cells 2.
  • the embodiment of the present application relates to a secondary battery including a first adapter piece 1, a second adapter piece, and a battery core 2, the battery core 2 including a first pole piece 21, a second pole piece, and a first pole 22 And the second tab, the two end points in the thickness direction of the cell are respectively T1 and T3;
  • the cell 2 is a multi-pole cell 2, that is, at least two first pole pieces 21 are provided with a first tab 22, all of the first tabs 22 are stacked to form a first multi-pole structure 23, and are connected to the first interposer 1.
  • the first pole piece 21 is provided with a first tab 22 (at There is no T2 point in this embodiment, and its schematic diagram is shown in FIG.
  • the first multi-pole structure 23 and the first adapter piece 1 form a first adapter member, and the battery core 2 has at most one layer of the first adapter member in the L direction, thereby effectively reducing the occupation of the multi-pole bend
  • the top space of the battery further increases the energy density of the secondary battery.
  • the first attachment site partially overlaps or does not overlap with all of the first tabs in the L direction, and preferably does not overlap.
  • the two end points in the thickness direction of the cell are T1 and T3, respectively, and the position of the first pole farthest from T1 is T2, all of which are One of the tabs 22 is located between T1 and T2 in the thickness direction of the cell. All of the first tabs 22 are bent away from the center of the cell to form a first multi-pole structure 23, and the first multi-pole structure 23 is bent toward the center of the cell and then connected to the first interposer 1.
  • the first connection site 11 may be located between T1 and T2 or between T2 and T3 in the thickness direction.
  • the specific welding method is as follows: the first pole piece 21 is disposed between the first pole pieces 21 between T1 and T2, all of which are first The tabs 22 are bent away from the center of the cell and are stacked neatly to form a first multi-pole structure 23, and then the first adapter piece 1 is after-welding; after welding, the first adapter member is at the T2 position.
  • the first adapter piece 1 is bent toward the center of the battery core and is led along the center of the battery core to match the battery aluminum plastic film double pit design.
  • connection site of the first multi-pole structure 23 and the first interposer 1 can continue to extend along the thickness direction of the cell, between T2 and T3 in the thickness direction of the cell. That is, the first connection site 11 is located between T2 and T3 in the thickness direction of the cell, and the first pole piece 21 between T1 and T2 in the thickness direction of the cell is provided with the first tab 22, thereby further The gap width between the first adapter member and the battery cell 2 is reduced. In this embodiment, only one layer of the first adapter member is provided in the L direction of the cell.
  • the two end points in the thickness direction of the cell are T1 and T3, respectively, and the position of the first tab farthest from T1 is T2, in the thickness direction of the cell.
  • the first pole piece 21 between the upper ones T1 and T2 is provided with a first pole 22, and all the first poles 22 are bent toward the center of the battery core to form a first multi-pole structure 23, and the first multi-pole structure 23 Deviated from the center of the cell, and then connected to the first adapter piece 1, the bending point of the first multi-pole structure 23 and all the first tabs 22 are located in the thickness direction of the battery T1 to T2 between.
  • the first adapter piece 1 is drawn along the same side as the first tab 22, and is suitable for a single-pit design of the battery outer packaging film.
  • the two end points in the thickness direction of the cell are respectively T1 and T3, and the position of a first tab farthest from T1 is T2, in the thickness direction of the cell.
  • the first pole piece 21 between the upper T1 and the T2 is disposed with the first pole 22, and all the first poles 22 are bent toward the center of the battery core to form a first multi-pole structure 23, and the first adapter piece 1 is directly It is connected to the first multi-pole structure 23.
  • the first transition member In the L direction of the cell, there is only one layer of the first transition member.
  • the specific soldering method is as follows: all the first tabs 22 are bent and extended toward the center of the cell, and are stacked neatly to form a first multi-pole structure 23, and then the first adapter piece 1 is after-welding, after soldering The first adapter piece 1 is taken out, and has only one layer of the first adapter member in the L direction.
  • the first connection site 11 is located between T2 and T3 in the thickness direction.
  • the second tab is disposed in the same manner as the first tab 22, and the second tab is disposed in the same manner as the first tab 1. Further preferably, the first tab piece and the second tab piece are relatively flush, so that the first and second tabs of the same tab can be used to connect the positive and negative ears at one time, thereby The ear pitch can be guaranteed to facilitate packaging.
  • the battery core 2 is a wound type battery core as shown in FIG. 7, and may also be a laminated battery core as shown in FIG. 8, and may also be a laminated-wound hybrid electric battery. core.
  • the first pole piece 21 is a positive pole piece and the second pole piece is a negative pole piece; or the first pole piece 21 is a negative electrode piece and the second pole piece is a positive electrode piece.

Abstract

本申请涉及二次电池领域，具体讲，涉及一种二次电池电芯。本申请的二次电池电芯包括第一转接片、第二转接片和电芯，电芯包括第一极片、第二极片、第一极耳以及第二极耳，至少两个第一极片均设置有第一极耳，所有第一极耳层叠设置形成第一多极耳结构，并与第一转接片相连接，第一多极耳结构和第一转接片形成第一转接构件，在与第一极片平行的方向上，最多具有一层第一转接构件。本申请有效减少了现有极耳弯折对电池顶部空间的浪费，从弯折效果上也更加稳定，进而提高电池能量密度。

Description

一种二次电池电芯 技术领域
本申请涉及二次电池领域，具体讲，涉及一种二次电池电芯。
背景技术
目前，在追求高能量密度电池的同时，电池对倍率性能要求也越来越高，对于放电平台有更高的要求，除了电池材料本身的影响，在电池结构设计上，也可以通过多极耳结构降低电池的阻抗，提高电池的各项性能。如图1所示，已有技术中多极耳卷绕结构的极耳转接采用的是二次弯折极耳，占用了较多的顶部空间，降低了电池的能量密度。
鉴于此，特提出本申请。
发明内容
本申请的发明目的在于提出一种二次电池电芯。
为了完成本申请的目的，采用的技术方案为：
本申请涉及一种二次电池电芯，包括第一转接片、第二转接片和电芯，所述电芯包括第一极片、第二极片、第一极耳以及第二极耳，与所述第一极片平行的方向为L，在所述电芯的厚度方向(即T-T方向)上的两个端点分别为T1和T3，至少两个第一极片均设置有所述第一极耳，距离T1或T3最远的一个所述第一极耳的位点为T2，所有所述第一极耳层叠设置形成第一多极耳结构，并与所述第一转接片相连接，所述第一多极耳结构和所述第一转接片形成第一转接构件；在所述L方向上，最多具有一层所述第一转接构件。
优选的，所有所述第一极耳位于所述电芯厚度方向上的所述T1至所述T2之间，在所述L方向上最多具有一层所述第一转接构件。
优选的，所述第一多极耳结构由背离所述电芯中心弯折的所有所述第一极耳形成，所述第一转接片与朝向所述电芯中心弯折的所述第一多极耳结构相连接。
优选的，所述第一多极耳结构由朝向所述电芯中心弯折的所有所述第一极耳形成，所述第一转接片与背离所述电芯中心弯折的所述第一多极耳结构相连接。
优选的，所有所述第一极耳位于所述电芯厚度方向上的所述T1至所述T2之间，所述第一多极耳结构的弯折点与所有所述第一极耳均位于所述电芯厚度方向上的所述T1至所述T2之间。
优选的，所述第一极耳转接片和第二极耳转接片相对位置平齐。
优选的，所有所述第一极耳位于所述电芯厚度方向上的所述T1至所述T2之间，所述第一转接片与所述第一多极耳结构的连接位点为第一连接位点，所述第一连接位点与所有所述第一极耳在所述L方向上部分重叠或不重叠。
优选的，所述第一极耳转接片和第二极耳转接片相对位置平齐。
优选的，所述第二极耳的设置与所述第一极耳相同，所述第二转接片的设置与所述第一转接片相同，且所述第一极耳和所述第二极耳不重叠。
优选的，所述电芯为卷绕式电芯、叠片式电芯或卷绕叠片混合式电芯。
优选的，所述第一极片为正极极片，所述第二极片为负极极片；或，所述第一极片为负极极片，所述第二极片为正极极片。
本申请的技术方案至少具有以下有益的效果：
本申请的技术方案能有效减少现有极耳弯折对电池顶部空间的浪费，从弯折效果上也更加稳定，进而提高电池能量密度。
附图说明
图1为已有技术中的二次电池示意图；
图2为本申请某一实施例中的二次电池示意图；
图3为本申请某一实施例中的二次电池示意图；
图4为本申请某一实施例中的二次电池示意图；
图5为本申请某一实施例中的二次电池示意图；
图6为本申请某一实施例中的二次电池示意图；
图7为本申请实施例中卷绕式电芯示意图；
图8为本申请实施例中叠片式电芯示意图；
其中：
1-第一转接片；
11-第一连接位点；
2-电芯；
21-第一极片；
22-第一极耳；
23-第一多极耳结构；
L-L为与第一极片平行的方向；
T-T为电芯厚度方向。
具体实施方式
下面结合具体实施例，进一步阐述本申请。应理解，这些实施例仅用于说明本申请而不用于限制本申请的范围。
现有卷绕结构的二次电池的示意图如图1所示，电芯的厚度方向(即T-T方向)上的两个端点分别为T1和T3，每一圈集流体引伸出来的一个极耳，距离T1最远的一个第一极耳的位点为T2，第一极耳22和第二极耳均在电池厚度方向上的T1至T2之间引出。在该图中，第一转接构件在电池的一侧发生了两次弯折，从而占用了较大的L方向空间。具体的转接焊方法为：在电芯厚度方向上的T1至T2之间的第一极片21均设置第一极耳22，所有第一极耳22朝向电芯中心弯折延伸，整齐的叠在一起；可先将多个第一极耳22预焊接在一起，然后将尾部不整齐的地方切除，形成第一多极耳结构23，然后转接焊第一转接片1，第一多极耳结构23、第一转接片1形成第一转接构件；焊接后再将第一转接构件在电芯厚度方向的另一侧进行弯折，并沿电芯中心的位置引出第一转接片1，从而与电池铝塑膜冲 双坑设计相匹配。在该实施方式中，在电芯2的L方向上具有两层第一转接构件。
本申请实施例涉及一种二次电池，包括第一转接片1、第二转接片和电芯2，该电芯2包括第一极片21、第二极片、第一极耳22以及第二极耳，电芯的厚度方向上的两个端点分别为T1和T3；在本申请中，电芯2为多极耳电芯2，即至少两个第一极片21均设置有第一极耳22，所有第一极耳22层叠设置形成第一多极耳结构23，并与第一转接片1连接，优选的，第一极片21均设置第一极耳22(在本实施例中无T2点)，其示意图如图2所示，从而更加有效的降低电池阻抗。第一多极耳结构23和第一转接片1形成第一转接构件，在电芯2在L方向上最多具有一层第一转接构件，从而有效减少了多极耳弯折所占用的电池顶部空间，进而提高了二次电池能量密度。第一连接位点与所有第一极耳在L方向上部分重叠或不重叠，并优选不重叠。
在本申请实施例中，如图3和图4所示，电芯的厚度方向上的两个端点分别为T1和T3，距离T1最远的一个第一极耳的位点为T2，所有第一极耳22位于电芯厚度方向上的T1至T2之间。所有第一极耳22背离电芯中心弯折形成第一多极耳结构23，第一多极耳结构23朝向电芯中心弯折，然后与第一转接片1相连接。其中，第一连接位点11可位于厚度方向上的T1至T2之间或T2至T3之间。
当位于电芯2的T1至T2之间时，如图3所示，具体的转接焊方法为：在T1至T2之间的第一极片21均设置第一极耳22，所有第一极耳22背离电芯中心弯折延伸并整齐的叠在一起，形成第一多极耳结构23，然后转接焊第一转接片1；焊接后再将第一转接构件在T2位点朝向电芯中心弯折，并沿电芯中心的位置引出第一转接片1，从而与电池铝塑膜冲双坑设计相匹配。在该实施方式中，在电芯2的L方向上仅有一层第一转接构件，且相对于第一极片21，电芯厚度方向上T2至T3之间没有第一转接构件，从而大大节约了电池顶部的空间。
进一步的，如图4所示，第一多极耳结构23与第一转接片1的连接位点可沿电芯的厚度方向继续延伸，位于电芯厚度方向上的T2至T3之间， 即第一连接位点11位于电芯厚度方向上的T2至T3之间，而在电芯厚度方向上的T1至T2之间的第一极片21均设置第一极耳22，从而可进一步减小第一转接构件与电芯2之间的间隙宽度。该实施方式中，在电芯的L方向上，仅具有一层第一转接构件。
在本申请实施例中，如图5所示，电芯的厚度方向上的两个端点分别为T1和T3，距离T1最远的一个第一极耳的位点为T2，在电芯厚度方向上的T1至T2之间的第一极片21均设置第一极耳22，所有第一极耳22朝向电芯中心弯折，形成第一多极耳结构23，第一多极耳结构23背离所述电芯中心弯折，然后与第一转接片1相连接，第一多极耳结构23的弯折点与所有第一极耳22均位于电芯厚度方向上的T1至T2之间。该实施方式中，第一转接片1沿与第一极耳22相同的一侧引出，适用于电池外包装膜为单坑设计。
在本申请实施例中，如图6所示，电芯的厚度方向上的两个端点分别为T1和T3，距离T1最远的一个第一极耳的位点为T2，在电芯厚度方向上的T1至T2之间的第一极片21均设置第一极耳22，所有第一极耳22朝向电芯中心弯折，形成第一多极耳结构23，第一转接片1直接与第一多极耳结构23相连接。在电芯的L方向上，仅具有一层的第一转接构件。具体的转接焊方法为：所有第一极耳22朝向电芯中心弯折延伸并整齐的叠在一起，形成第一多极耳结构23，然后转接焊第一转接片1，焊接后引出第一转接片1，在L方向上，仅具有一层第一转接构件。第一连接位点11位于厚度方向上的T2至T3之间。
在上述具体实施方式中，第二极耳的设置与第一极耳22相同，第二转接片的设置与第一转接片1相同。进一步优选的，第一极耳转接片和第二极耳转接片相对位置平齐，从而可采用同极耳胶的第一第二转接极耳进行一次性连接正负极耳，从而可保证极耳间距，有利于封装。
在上述具体实施方式中，电芯2为可为如图7所示的卷绕式电芯，也可为如图8所示的叠片式电芯，还可为叠片卷绕混合式电芯。
在上述具体实施方式中，第一极片21为正极极片，第二极片为负极极片；或，第一极片21为负极极片，第二极片为正极极片。
本申请虽然以较佳实施例公开如上，但并不是用来限定权利要求，任何本领域技术人员在不脱离本申请构思的前提下，都可以做出若干可能的变动和修改，因此本申请的保护范围应当以本申请权利要求所界定的范围为准。

Claims (10)

  1. 一种二次电池电芯，包括第一转接片、第二转接片和电芯，所述电芯包括第一极片、第二极片、第一极耳以及第二极耳，与所述第一极片平行的方向为L，在所述电芯的厚度方向上的两个端点分别为T1和T3，
    其特征在于，
    至少两个第一极片均设置有所述第一极耳，距离T1或T3最远的一个所述第一极耳的位点为T2，所有所述第一极耳层叠设置形成第一多极耳结构，并与所述第一转接片相连接，所述第一多极耳结构和所述第一转接片形成第一转接构件；在所述L方向上，最多具有一层所述第一转接构件。
  2. 根据权利要求1所述的二次电池电芯，其特征在于，所有所述第一极耳位于所述电芯厚度方向上的所述T1至所述T2之间，在所述L方向上最多具有一层所述第一转接构件。
  3. 根据权利要求1所述的二次电池电芯，其特征在于，所述第一多极耳结构由背离所述电芯中心弯折的所有所述第一极耳形成，所述第一转接片与朝向所述电芯中心弯折的所述第一多极耳结构相连接。
  4. 根据权利要求1所述的二次电池电芯，其特征在于，所述第一多极耳结构由朝向所述电芯中心弯折的所有所述第一极耳形成，所述第一转接片与背离所述电芯中心弯折的所述第一多极耳结构相连接。
  5. 根据权利要求4所述的二次电池电芯，其特征在于，所有所述第一极耳位于所述电芯厚度方向上的所述T1至所述T2之间，所述第一多极耳结构的弯折点与所有所述第一极耳均位于所述电芯厚度方向上的所述T1至所述T2之间。
  6. 根据权利要求1所述的二次电池电芯，其特征在于，所述第一极耳转接片和第二极耳转接片相对位置平齐。
  7. 根据权利要求6所述的二次电池电芯，其特征在于，所有所述第一极耳位于所述电芯厚度方向上的所述T1至所述T2之间，所述第一转接片与所述第一多极耳结构的连接位点为第一连接位点，所述第一连接位点与 所有所述第一极耳在所述L方向上部分重叠或不重叠。
  8. 根据权利要求1～7任一权利要求所述的二次电池电芯，所述第二极耳的设置与所述第一极耳相同，所述第二转接片的设置与所述第一转接片相同。
  9. 根据权利要求1～7任一权利要求所述的二次电池电芯，其特征在于，所述电芯为卷绕式电芯、叠片式电芯或卷绕叠片混合式电芯。
  10. 根据权利要求1～7任一权利要求所述的二次电池电芯，其特征在于，所述第一极片为正极极片，所述第二极片为负极极片；或，所述第一极片为负极极片，所述第二极片为正极极片。
PCT/CN2017/107063 2016-11-23 2017-10-20 一种二次电池电芯 WO2018095170A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/420,197 US20190280280A1 (en) 2016-11-23 2019-05-23 Secondary battery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201621259513.5U CN206332097U (zh) 2016-11-23 2016-11-23 一种二次电池电芯
CN201621259513.5 2016-11-23

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/420,197 Continuation US20190280280A1 (en) 2016-11-23 2019-05-23 Secondary battery

Publications (1)

Publication Number Publication Date
WO2018095170A1 true WO2018095170A1 (zh) 2018-05-31

Family

ID=59289101

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/107063 WO2018095170A1 (zh) 2016-11-23 2017-10-20 一种二次电池电芯

Country Status (3)

Country Link
US (1) US20190280280A1 (zh)
CN (2) CN206332097U (zh)
WO (1) WO2018095170A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113644389A (zh) * 2020-04-27 2021-11-12 北京小米移动软件有限公司 电池模组及其制作方法

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206332097U (zh) * 2016-11-23 2017-07-14 东莞新能源科技有限公司 一种二次电池电芯
CN109361006A (zh) * 2018-08-27 2019-02-19 北京长城华冠汽车科技股份有限公司 电池模组以及电池模组的装配方法
CN111403789B (zh) * 2019-01-02 2021-12-10 东莞新能源科技有限公司 电极组件及电池
CN111755657B (zh) 2019-03-29 2022-02-15 宁德新能源科技有限公司 电极组件
CN110560877B (zh) * 2019-09-26 2021-07-06 镇江四洋特种金属材料制造有限公司 一种多层铝及铝合金带焊接方法
CN111063937B (zh) * 2019-11-25 2024-03-22 Oppo广东移动通信有限公司 柔性电芯及终端
CN112310423B (zh) * 2019-12-04 2022-03-15 宁德时代新能源科技股份有限公司 叠片电芯生产系统以及叠片电芯成型方法
JP7469091B2 (ja) * 2020-03-23 2024-04-16 本田技研工業株式会社 リチウムイオン二次電池
WO2021237711A1 (zh) * 2020-05-29 2021-12-02 宁德新能源科技有限公司 电池和具有所述电池的用电装置
CN114649556A (zh) * 2020-12-21 2022-06-21 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN112968219A (zh) * 2021-02-05 2021-06-15 远景动力技术(江苏)有限公司 一种电芯、电池模组、电池包及电池的制作方法
CN112821012B (zh) * 2021-03-01 2024-03-29 厦门海辰新材料科技有限公司 极耳结构、电芯以及电池
CN115133232A (zh) * 2021-03-26 2022-09-30 宁德新能源科技有限公司 电芯及用电装置
CN114467223A (zh) * 2021-03-31 2022-05-10 宁德新能源科技有限公司 一种电极组件、电化学装置及用电设备
CN113437443B (zh) * 2021-06-21 2023-06-20 东莞新能安科技有限公司 电化学装置和电子装置
JP2023094918A (ja) * 2021-12-24 2023-07-06 プライムプラネットエナジー＆ソリューションズ株式会社 二次電池
CN114597601B (zh) * 2022-03-11 2024-03-19 上海兰钧新能源科技有限公司 一种极耳焊接方法及电芯

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202454681U (zh) * 2012-02-25 2012-09-26 佛山市顺德区精锐电池科技有限公司 高效率锂离子电池
CN105489825A (zh) * 2015-12-01 2016-04-13 西安瑟福能源科技有限公司 一种功率型软包装锂离子电池电芯的制造方法
CN206332097U (zh) * 2016-11-23 2017-07-14 东莞新能源科技有限公司 一种二次电池电芯

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8574753B2 (en) * 2009-08-27 2013-11-05 Kabushiki Kaisha Toshiba Battery comprising a conductive nipping member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202454681U (zh) * 2012-02-25 2012-09-26 佛山市顺德区精锐电池科技有限公司 高效率锂离子电池
CN105489825A (zh) * 2015-12-01 2016-04-13 西安瑟福能源科技有限公司 一种功率型软包装锂离子电池电芯的制造方法
CN206332097U (zh) * 2016-11-23 2017-07-14 东莞新能源科技有限公司 一种二次电池电芯

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113644389A (zh) * 2020-04-27 2021-11-12 北京小米移动软件有限公司 电池模组及其制作方法
CN113644389B (zh) * 2020-04-27 2023-05-16 北京小米移动软件有限公司 电池模组及其制作方法

Also Published As

Publication number Publication date
CN206332097U (zh) 2017-07-14
US20190280280A1 (en) 2019-09-12
CN207320217U (zh) 2018-05-04

Similar Documents

Publication Publication Date Title
WO2018095170A1 (zh) 一种二次电池电芯
US10490857B2 (en) Wound cell
US11611111B2 (en) Wound-type battery cell
WO2018054332A1 (zh) 一种卷绕式电芯
WO2019024873A1 (zh) 一种软包锂离子电池及其制造方法
WO2022247665A1 (zh) 极耳极片及卷绕电池
WO2018054331A1 (zh) 一种卷绕式电芯
CN206098526U (zh) 卷绕式二次电芯
CN108987655A (zh) 电池
WO2022242578A1 (zh) 极耳极片及卷绕电池
US20180342759A1 (en) Lithium-ion battery cell and lithium-ion battery
WO2020078081A1 (zh) 叠片电芯及其制作方法、锂电池
WO2018121133A1 (zh) 一种卷绕式电芯
CN205429100U (zh) 锂离子电芯
WO2017152575A1 (zh) 二次电池极耳及二次电池
CN106159196A (zh) 埋极耳式极片及锂离子电池
CN102208679B (zh) 卷绕连续叠片式方型锂离子动力电池
CN205508963U (zh) 卷绕式电芯
US20190027758A1 (en) Electrode piece, cell and energy storage device
TW201407859A (zh) 單卷芯、具有單卷芯之鋰電池及單卷芯之連續卷繞方法
CN211045637U (zh) 一种聚合物电芯
CN206003898U (zh) 一种卷绕式电芯
CN201956416U (zh) 锂离子电池正极极片
CN205846128U (zh) 一种二次电池电芯
US10833371B2 (en) Wound-type cell

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17874856

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17874856

Country of ref document: EP

Kind code of ref document: A1