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Lithium battery cell

A technology of lithium batteries and batteries, which is applied in the manufacture of secondary batteries, non-aqueous electrolyte batteries, and electrolyte batteries, and can solve problems such as battery drop failure

Inactive Publication Date: 2019-09-06
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to improve the problem of failure of lithium battery cell drop and realize flexible manufacturing. The present invention provides a lithium battery cell

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0032] A lithium battery cell includes a stack of pole piece composites 2 that include a positive electrode sheet, a negative electrode sheet, and a separator. The separator is located between the positive electrode sheet and the negative electrode sheet. Two glue lines 3 are glued on the rear end surface of the pole piece composite body 2 provided, and the two glue lines 3 are in the shape of a'wave line', and the two glue lines 3 are staggered and arranged symmetrically. A mesh glue line 3 is formed, and the height of at least one of the crests and troughs of the glue line 3 is equal to the thickness of the lithium battery cell 1, and the diaphragms of each layer of the pole piece composite 2 are bonded together to achieve the purpose of fixing.

[0033] Further, the way of stacking arrangement is a'Z'-shaped stacking arrangement.

[0034] Further, the lithium battery cell further includes a cell membrane shell, a positive electrode ear, and a negative electrode ear. The positive...

specific Embodiment approach 2

[0036] A lithium battery cell includes a stack of pole piece composites 2 that include a positive electrode sheet, a negative electrode sheet, and a separator. The separator is located between the positive electrode sheet and the negative electrode sheet. A glue line 3 is glued on the rear end surface of the pole piece composite body 2. The glue line 3 is in the shape of a'wave line', and the height of the wave peaks and troughs of the glue line 3 is equal to that of the lithium battery cell 1. Thickness, the glue line 3 connects all the laminated pole piece composites 2 to bond the diaphragms of each pole piece composite 2 together to achieve the purpose of fixation.

[0037] Further, the way of stacking arrangement is a'Z'-shaped stacking arrangement.

[0038] Further, the lithium battery cell further includes a cell membrane shell, a positive electrode ear, and a negative electrode ear. The positive electrode ear is fixedly connected to the positive electrode sheet, the negative...

specific Embodiment approach 3

[0040] A lithium battery cell includes a stack of pole piece composites 2 that include a positive electrode sheet, a negative electrode sheet, and a separator. The separator is located between the positive electrode sheet and the negative electrode sheet. A plurality of glue lines 3 are glued on the rear end surface of the pole piece composite body 2 provided, and the plurality of glue lines 3 are all vertically distributed straight lines, and each glue line 3 is partially bonded to the pole piece composite body On the rear end surface of 2, all the glue lines 3 are combined and pasted to connect all the laminated pole piece composites 2. The diaphragms of each pole piece composite body 2 are bonded together to achieve the purpose of fixing.

[0041] Further, the way of stacking arrangement is winding stacking arrangement.

[0042] Further, the lithium battery cell further includes a cell membrane shell, a positive electrode ear, and a negative electrode ear. The positive electrod...

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Abstract

The invention provides a lithium battery cell, and belongs to the technical field of lithium batteries. The lithium battery cell comprises pole plate combination bodies which are arranged in a lamination way, wherein each pole plate combination body comprises a positive pole plate, a negative pole plate and a diaphragm, wherein the diaphragm is arranged between the positive pole plate and the negative pole plate, and at least one glue line or at least one glue surface is pasted onto a front end surface and / or a rear end surface of the pole plate combination bodies arranged in the lamination way. The diaphragm at an end part of the pole plate combination body is comprehensively constrained by the network-shaped glue line, the constraint area of the diaphragm is expanded, a phenomenon that the diaphragm is turned over when the pole plate combination body is assembled into a membrane shell is prevented, turnover caused by electrolyte back flush and the end part collided with the diaphragmduring falling is prevented, the risk that a positive pole plate and a negative pole plate of the battery cell are contacted or pole powder of the negative pole plate and the positive pole plate is contacted can be effectively prevented, the glue pasting has relatively high applicability, different types of battery cells can be compatible, and flexible manufacturing is achieved.

Description

Technical field [0001] The invention belongs to the technical field of lithium batteries, and particularly relates to a lithium battery cell. Background technique [0002] With the development of the market, portable electronic products have higher and higher requirements for the safety performance of lithium batteries. In addition, for lithium battery manufacturers, flexible product manufacturing will be the industry development trend. [0003] At present, the method to improve the drop failure of the lithium battery industry is mainly to restrain the battery cell by encapsulating the diaphragm at the end of the battery cell. This method has the following problems: [0004] ①The encapsulation area is limited (usually one at the head and one at the tail), and the end diaphragm is easy to fold when the battery core is inserted into the shell; [0005] ②It is necessary to choose tapes of different lengths according to different models, which is complicated to change; [0006] ③When the b...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0587
CPCH01M10/058H01M10/0587Y02E60/10Y02P70/50
Inventor 盛东辉何伊王琳川周仕昌徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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