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Battery shell structure

A layer structure, battery shell technology, applied in structural parts, battery pack components, circuits, etc., can solve the problems of reducing battery life, battery burst, overheating, etc., to improve safety, strength, and safety. Effect

Inactive Publication Date: 2018-12-07
KUSN APLUS TEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, if the used battery is overheated due to a sharp rise in temperature due to improper operation, it is easy to cause the battery to burst
In addition, the aluminum foil of the battery is broken due to external force, and it is easy to react inside, and then generate and release oxygen, carbon dioxide or other gases, which will cause the battery shell to absorb gas and expand, reducing the service life of the battery

Method used

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Examples

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Embodiment 1

[0050] Embodiment 1: A kind of battery shell layer structure, comprises the polypropylene film (South Asia, CXDA) that uses thickness 40 μ m as described inner cover layer, and on described inner cover layer with polyurethane resin (Asia electric material company, model AEM -A1) Forming the first adhesive layer with a thickness of 3 μm, using an aluminum foil layer with a thickness of 40 μm as the gas barrier layer, and then forming the second adhesive layer with a thickness of 3 μm on the gas barrier layer , on the second adhesive layer, to contain 5% N, N'-two (2-naphthyl) p-phenylenediamine (Tianqing Chemical, model anti-aging agent DNP) and polyvinyl fluoride (Du Pont, PV2025 ) to form the outer protective layer with a thickness of 25 μm, that is, the battery shell structure shown in Example 1 is obtained.

Embodiment 2

[0051] Embodiment 2: A battery shell structure, including using a polyethylene film with a thickness of 30 μm as the inner cover layer, and forming the first adhesive layer with a thickness of 5 μm on the inner cover layer with a polyester resin , using an aluminum foil layer with a thickness of 50 μm as the gas barrier layer, and then forming the second adhesive layer with a thickness of 3 μm on the gas barrier layer, and on the second adhesive layer, containing 2% Tetra[beta-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and polytetrafluoroethylene form the described outer protective layer that thickness is 10 μ m, promptly make the described outer protection layer shown in embodiment 2 battery shell structure.

Embodiment 3

[0052] Embodiment 3: A battery shell structure, including using a polypentene film with a thickness of 50 μm as the inner cover layer, and forming the first adhesive with a thickness of 5 μm on the inner cover layer with a polyolefin resin Layer, using an aluminum foil layer with a thickness of 30 μm as the gas barrier layer, and then forming the second adhesive layer with a thickness of 5 μm on the gas barrier layer, on the second adhesive layer, containing 3 % tri(butylcresyl)butane and polychlorotrifluoroethylene form the outer protective layer with a thickness of 50 μm, that is, the battery shell structure shown in Example 3 is obtained.

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Abstract

The invention discloses a battery shell structure. The battery shell structure comprises at least one inner covering layer, a first bonding agent layer, a gas blocking layer, a second bonding agent layer and an outer protective layer, wherein the first bonding agent layer is formed between the inner covering layer and the gas blocking layer, and the gas blocking layer is formed between the first bonding agent layer and the second bonding agent layer, the second bonding agent layer is formed between the gas blocking layer and the outer protective layer; the outer protective layer comprises a free radical scavenger and a fluorine-based polymer; the inner covering layer is a polyolefin layer; the thickness of the outer protective layer is 10-50 microns, and the thickness of the inner coveringlayer is 30-50 microns. The outer protective layer comprises the free radical scavenger and the fluorine-based polymer, and the free radical generated by the lithium ion secondary battery in the electrolyte can be captured through the free radical scavenger, and the safety of the lithium ion secondary battery is improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a battery shell structure. Background technique [0002] Lithium batteries are one of the power supply sources widely used in electronic equipment such as notebook computers, mobile phones, digital cameras and electric vehicles. With the influence of electronic equipment becoming thinner and lighter, batteries are thinner to reduce their volume and reduce The design of the occupied space has also been paid more and more attention, and then a composite membrane-type battery shell structure formed by a laminated structure has been developed. [0003] A conventional battery structure includes an outer casing and a positive electrode layer encapsulated inside the outer casing, a negative electrode layer, a separator, and an electrolyte. The separator is placed between the positive electrode layer and the negative electrode layer, and the electrolyte is used to infiltrate the positi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/085B32B27/06B32B27/08B32B27/18B32B27/28B32B27/32H01M2/02
CPCB32B15/085B32B27/06B32B27/08B32B27/18B32B27/28B32B27/32B32B2457/10H01M50/124H01M50/1245Y02E60/10
Inventor 林志铭李建辉
Owner KUSN APLUS TEC CORP
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