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Lithium ion battery pole piece intermediate tab edge current collector protection structure and protection method

A lithium-ion battery and protection structure technology, applied in the direction of electrode carrier/current collector, secondary battery, structural parts, etc., can solve the problem of reducing the degree of damage, reduce the degree of damage, reduce damage, enhance service life and safety Effect

Pending Publication Date: 2017-09-15
SHENZHEN BAK POWER BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the current collector is pasted with two layers of protective glue, the shear force still exists, but due to the protective effect of the tape on the current collector, the damage to the current collector by the tabs will be greatly reduced, thereby enhancing the service life and safety of the lithium-ion battery

Method used

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  • Lithium ion battery pole piece intermediate tab edge current collector protection structure and protection method
  • Lithium ion battery pole piece intermediate tab edge current collector protection structure and protection method
  • Lithium ion battery pole piece intermediate tab edge current collector protection structure and protection method

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Embodiment Construction

[0027] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. The present application can be implemented in many different forms, and is not limited to the implementation manner described in this embodiment. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of the present application, wherein the words indicating orientation such as up, down, left, and right are only for the positions of the structures shown in the corresponding drawings.

[0028] However, those skilled in the art may recognize that description of one or more of the specific details may be omitted, or other methods, components or materials may also be used. In some instances, some implementations were not described or described in detail.

[0029] In addition, the technical features and technical solutions described herein can also be combi...

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PUM

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Abstract

The invention discloses a lithium ion battery pole piece intermediate tab edge current collector protection structure and protection method. The protection structure is characterized in that a lithium ion battery pole piece comprises a current collector and a tab welded with the current collector, and first protection glue between the end of the tab and the current collector is pasted at a first position of the current collector. Damage to the current collector caused by the tab can be reduced, the service life of a lithium ion battery is prolonged, and use safety of the lithium ion battery is improved.

Description

technical field [0001] The present application relates to the technical field of lithium-ion batteries, especially lithium-ion battery cells, and in particular to a protective structure for tab edge current collectors in lithium-ion battery battery chips. Background technique [0002] The positive tabs of existing lithium ion batteries generally use aluminum tabs (or other metals and alloys), and the current collectors are aluminum foils; the negative tabs use nickel tabs (or other metals and alloys), and the current collectors are copper foils. The tabs are connected to the current collector by means of welding (super welding, rivet welding, etc.). The edge of the lug cut by machining will be 90° or close to 90°, and the edge will be sharp. [0003] figure 1 It is a structural schematic diagram of an existing conventional lithium-ion battery pole piece, which mainly includes a current collector 1, a tab 2, a high-temperature protection glue 5 and a tab protection glue 6, ...

Claims

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Application Information

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IPC IPC(8): H01M4/70H01M2/26H01M10/0525
CPCH01M4/70H01M10/0525H01M50/531Y02E60/10
Inventor 孙新科杨雪琴吴正杰
Owner SHENZHEN BAK POWER BATTERY CO LTD