Polymer lithium ion battery with fixed diaphragm and manufacturing method thereof

A lithium-ion battery and polymer technology, applied in the manufacture of electrolyte batteries, secondary batteries, battery pack components, etc., can solve problems such as inability to use CID protection, shrinkage of positive and negative electrode diaphragms, and direct contact between positive and negative electrodes. , to avoid thermal runaway, improve cycle life, and not easy to shrink

Active Publication Date: 2015-04-29
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, while having many advantages, it also has some unavoidable disadvantages. For example, polymer lithium-ion batteries have very strict requirements on production conditions, and a slight negligence in environmental control may cause flatulence during the battery cycle, resulting in a sharp drop in capacity. ;Since the polymer lithium-ion battery is packaged in aluminum-plastic film, it cannot be protected b

Method used

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  • Polymer lithium ion battery with fixed diaphragm and manufacturing method thereof
  • Polymer lithium ion battery with fixed diaphragm and manufacturing method thereof
  • Polymer lithium ion battery with fixed diaphragm and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Only on the bottom side of the polymer battery, use three diaphragm fixing points with an area of ​​5*20mm to bond the diaphragm and aluminum-plastic film together, and there are no diaphragm fixing points on the other three sides.

Embodiment 2

[0040] On the bottom and top sides of the polymer battery, three diaphragm fixing points with an area of ​​5*20mm are used to bond the diaphragm and the aluminum-plastic film together, and there are no diaphragm fixing points on the other two sides.

Embodiment 3

[0042] The bottom edge, top edge and two sides of the polymer battery are respectively bonded to the separator and the aluminum-plastic film with three separator fixing points with an area of ​​5*20mm.

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PUM

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Abstract

The invention relates to a polymer lithium ion battery with a fixed diaphragm and a manufacturing method thereof. The manufacturing method adopts a heat sealing way to seal the diaphragm and an aluminum-plastic film wrapping a battery core together so as to play a role of fixing the battery core. The polymer lithium ion battery manufactured by the method has the advantages that as the battery core is fixed, the diaphragm is more closely fit with positive and negative pole pieces, so that the cycling performance of the battery is improved; in the safety performance test of acupuncture, short circuit, thermal shock and the like, the situation that the diaphragm contraction is caused by the inside temperature rise of the battery to result in thermal runaway is hard to occur, so that the safety performance of the battery is effectively improved.

Description

technical field [0001] The invention relates to a manufacturing method of a lithium ion battery, in particular to a manufacturing method of a polymer lithium ion battery with a fixed diaphragm. Background technique [0002] Polymer lithium-ion battery is a new type of lithium-ion battery developed in recent years. It has the advantages of low overall manufacturing cost, long cycle life, suitable for high-rate discharge, and can be designed into any monomer capacity and size. Its application prospects very broad. [0003] However, while having many advantages, it also has some unavoidable disadvantages. For example, polymer lithium-ion batteries have very strict requirements on production conditions, and a slight negligence in environmental control may cause flatulence during the battery cycle, resulting in a sharp drop in capacity. ;Since the polymer lithium-ion battery is packaged in aluminum-plastic film, it cannot be protected by CID like a steel case or a cylindrical ba...

Claims

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Application Information

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IPC IPC(8): H01M2/14H01M2/02H01M10/0525H01M10/0585H01M50/122H01M50/40
CPCH01M10/0525H01M10/058H01M50/116H01M50/40H01M50/403Y02E60/10Y02P70/50
Inventor 关成善宗继月张敬捧郭章飞
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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