Aluminum plastic film for packaging lithium battery and manufacturing process of aluminum plastic film

An aluminum-plastic film, lithium battery technology, applied in battery pack parts, battery box/jacket, battery box/cover material, etc., can solve the problem of affecting appearance, reduce battery barrier and dielectric coefficient, and only focus on material drawing performance and other issues to achieve the effect of enhancing slipperiness

Active Publication Date: 2015-03-25
MING CROWN ADVANCED MATERIAL CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

For a long time, manufacturers of packaging aluminum-plastic films for lithium batteries have only paid attention to the deep-drawing performance of materials, and have not paid attention to the disadvantages of easy corrosion of the outer layer of aluminum-plastic films. Corrosion of the outer layer of the aluminum-plastic film reduces the overall barrier and dielectric coefficient of the battery, and also affects the appearance

Method used

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  • Aluminum plastic film for packaging lithium battery and manufacturing process of aluminum plastic film

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Effect test

Embodiment

[0036] The manufacturing process of the aluminum-plastic film for lithium battery packaging of the present invention is as follows:

[0037] 1) Using aluminum foil, surface treatment is done on both sides of the aluminum foil first, the smooth side is treated with anti-corrosion treatment, and the matte side is treated with increasing surface tension;

[0038] 2) Mix according to the ratio of epoxy resin modified fluororesin coating B: curing agent B = 100:19, and add 80% of the corresponding mass of butanone at the same time, stir and mix evenly;

[0039] 3) Coat the coating of system B on the matte surface of the aluminum foil, with a wet film thickness of 35 μm-50 μm;

[0040] 4) The temperature of the drying tunnel is set to a temperature gradient of 80-100-90°C, and the aluminum foil runs in the drying tunnel at a speed of 5M / min to ensure that the winding is intact;

[0041] 5) The semi-finished product is cured in a curing chamber at 80°C-100°C for 16-24 hours;

[004...

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Abstract

The invention relates to an aluminum plastic film for packaging a lithium battery. The aluminum plastic film comprises a CPP layer (1), an inner bonding layer (2), an aluminum foil layer (3) and a fluorine-containing transparent coating (4), wherein the fluorine-containing transparent coating (4) comprises a fluorine-modified high-temperature-resistant acrylic acid coating, a fluorine-modified high-temperature-resistant polyurethane coating, an FEVE coating or a PVDF coating. The invention also provides a manufacturing process of the aluminum plastic film for packaging the lithium battery. When the aluminum plastic film is in contact with accidentally-dropping electrolyte in the process of packaging and injecting the electrolyte, the aluminum plastic film cannot be corroded, and the slippery property of the outer surface of the film is improved.

Description

technical field [0001] The invention belongs to the field of lithium battery packaging production, and in particular relates to an aluminum-plastic film for lithium battery packaging and a manufacturing process thereof. Background technique [0002] Aluminum-plastic film for lithium battery packaging is used for battery packaging, which overcomes the long-term safety hazard caused by hard material packaging batteries: battery explosion caused by inflation. For a long time, manufacturers of packaging aluminum-plastic films for lithium batteries have only paid attention to the deep-drawing performance of materials, and have not paid attention to the disadvantages of easy corrosion of the outer layer of aluminum-plastic films. Corrosion of the outer layer of the aluminum-plastic film reduces the overall barrier and dielectric coefficient of the battery, and also affects the appearance. Contents of the invention [0003] In order to overcome the above-mentioned defects, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02B32B15/085B32B15/04B32B15/095B32B15/082B32B15/08H01M50/129H01M50/145
CPCB32B15/04B32B15/08B32B15/082B32B15/085B32B15/095H01M50/116H01M50/124H01M50/1245Y02E60/10
Inventor 张曙光唐春峰张鹏纪孝熹吴松方艳徐海燕
Owner MING CROWN ADVANCED MATERIAL CO LTD
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