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Method for improving soft package lithium ion battery liquid retention capacity and lithium ion battery prepared by the same

A lithium-ion battery and soft-pack technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, battery pack parts, etc. Solve the effect of relatively poor performance and simple structure

Inactive Publication Date: 2016-12-21
ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the invention is to provide a solution that can solve the problem that the free electrolyte is easy to be extracted, so that the liquid retention capacity of the soft-pack lithium-ion battery is lower than that of the square lithium-ion battery, so that the cycle of the soft-pack lithium-ion battery A method to improve the liquid retention capacity of soft-pack lithium-ion batteries due to relatively poor performance such as lifespan

Method used

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  • Method for improving soft package lithium ion battery liquid retention capacity and lithium ion battery prepared by the same
  • Method for improving soft package lithium ion battery liquid retention capacity and lithium ion battery prepared by the same
  • Method for improving soft package lithium ion battery liquid retention capacity and lithium ion battery prepared by the same

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Embodiment 1

[0023] figure 2 and image 3 It is a structural schematic diagram of a soft-pack lithium-ion battery treated by the method for increasing the liquid retention capacity of the soft-pack battery according to the present invention. The method for improving the liquid retention capacity of the soft-pack battery described in the present invention is to paste a foam 5 with a certain width and thickness on the side of the pole group 4 close to the pole group ear 3, and the porosity of the foam is 30% to 70%. %. In this embodiment, the foam is polyethylene foam, which has many advantages such as water and moisture resistance, shock resistance, sound insulation, heat preservation, good plasticity, strong toughness, recycling, environmental protection, and strong impact resistance. , It also has good chemical resistance and is one of the best foam materials. In order to ensure the reliability of bonding between the foam 5 and the pole group 4, an adhesive 6 can be brushed on the per...

Embodiment 2

[0025] The difference between the second embodiment and the first embodiment mainly lies in that the foam is foamed polypropylene plastic. Foamed polypropylene plastic has light specific gravity, good elasticity, shock resistance and compression resistance, high deformation recovery rate, good absorption performance, oil resistance, acid resistance, alkali resistance, various chemical solvent resistance, non-absorbent, insulation, heat resistance [-40 ~ 130 ℃], non-toxic and tasteless, 100% recyclable with almost no loss in performance, it is a real environmentally friendly foam.

Embodiment 3

[0027] The difference between the third embodiment and the first embodiment mainly lies in that the foam is ethylene-vinyl acetate copolymer. Ethylene-vinyl acetate copolymer has good flexibility, rubber-like elasticity, good windability at -50°C, good transparency and surface gloss, good chemical stability, anti-aging and ozone resistance Well, non-toxic.

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Abstract

The invention relates to a method for improving the soft package lithium ion battery liquid retention capacity. Foam of certain width and thickness is sticked on one plate group side close to plate group tabs. A lithium ion battery product prepared by the method for improving the soft package lithium ion battery liquid retention capacity includes a shell, a plate group of the soft package lithium ion battery, the plate group tabs and the foam are all encapsulated in the shell, and external tabs extend out of the shell. The lithium ion battery provided by the invention has a simple structure, can well solve the problem of reduced liquid retention capacity of soft package lithium ion battery due to extraction during air suction sealing, and then well solves the problems of relatively poor cycle life and the like of soft package lithium ion batteries.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a method for increasing the liquid retention capacity of a soft-pack lithium-ion battery and a lithium-ion battery prepared by applying the method. Background technique [0002] With the shortage of non-renewable energy and the control of environmental pollution by the whole society, governments of various countries are actively encouraging the development of new energy. The development and application of lithium-ion batteries have become a bright spot in the new energy industry. More and more high-capacity lithium-ion batteries are being used in electric vehicles and energy storage. In order to meet the various needs of electric vehicles and energy storage, the performance and appearance size of lithium-ion batteries are increasingly demanding, especially with the increase in battery capacity, the appearance size of batteries will also increase accordingly. Soft-pack lithi...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0525H01M2/26
CPCH01M10/0525H01M10/058H01M50/531Y02E60/10Y02P70/50
Inventor 常林荣任宁常福荣李洪涛
Owner ZHEJIANG CHAOWEI CHUANGYUAN INDUSTRAIAL