Novel aluminum plastic film for lithium battery

A lithium battery and aluminum-plastic film technology, which is applied to battery pack components, circuits, electrical components, etc., can solve the problems of high cost and complicated process, and achieve the effects of low cost, high heat sealing, and easy production

Active Publication Date: 2013-06-19
江苏锦尚新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the aluminum-plastic film packaging materials used in flexible packaging lithium-ion batteries are mainly provided by J...

Method used

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Embodiment Construction

[0011] A new type of aluminum-plastic film for lithium batteries, including a protective layer, a chemical treatment layer I, an intermediate aluminum foil, a chemical treatment layer II and a heat-sealing layer,

[0012] The protective layer is made of polyamide and maleic anhydride-modified polypropylene or maleic anhydride-modified polyethylene by co-extrusion casting. The amount of polyamide accounts for 50%-70% of the total mass, and can be thermally pasted with aluminum foil Composite, can protect the aluminum foil, has impact resistance, and can be printed. The thickness of the protective layer is 15μm-30μm. This layer can be made by polyamide manufacturers with low cost; the protective layer can be made by co-extrusion casting of polyamide and maleic anhydride modified polypropylene, or polyamide and maleic anhydride modified polypropylene. It is made by co-extrusion casting of anhydride-modified polyethylene.

[0013] Maleic anhydride modified polypropylene or maleic...

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Abstract

The invention discloses a novel aluminum plastic film for a lithium battery. The novel aluminum plastic film comprises a protecting layer, a chemical treatment layer I, a middle aluminum foil, a chemical treatment layer II and a thermal sealing layer, wherein the chemical treatment layer I and the chemical treatment layer II are compact metal oxide film layers which are formed on the surface of the middle foil by performing chemical treatment on the surface of the middle aluminum foil by a mixture solution of chromium salt, acid and fluoride; and the protecting layer, the middle aluminum foil subjected to chemical treatment and the thermal sealing layer are combined in a once forming thermal adhesion mode by a thermal adhesion combining machine. The aluminum plastic film disclosed by the invention has the advantages of manufacturing easiness, low cost, good performance and the like, can be applied to packaging of a lithium ion battery core, and has the properties of high isolation, forming easiness, high thermal sealing capability, high electrolyte corrosion resistance and the like.

Description

technical field [0001] The invention relates to a lithium battery packaging film, in particular to a novel aluminum-plastic film for the lithium battery. Background technique [0002] Flexible packaging lithium-ion batteries have developed rapidly due to their excellent performance such as high energy density, long cycle life, and low natural discharge rate, and soon occupied most of the market in the battery industry. At present, the aluminum-plastic film packaging materials used in flexible packaging lithium-ion batteries are mainly provided by Japan. The compounding method is generally dry compounding or extrusion compounding. The process is very complicated and the cost is high. Contents of the invention [0003] The technical problem to be solved in the present invention is to propose a new type of aluminum-plastic film for lithium batteries with low cost and simple manufacturing process in view of the deficiencies of the prior art. [0004] The technical problem to ...

Claims

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Application Information

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IPC IPC(8): H01M2/02B65D65/40
CPCY02E60/10
Inventor 张兴洋于广省单宁何建忠徐根华张军梁裕波江灿灿伏阳陈强吴新上
Owner 江苏锦尚新材料有限公司
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