High-acid-resistance aluminum-plastic film for lithium battery and preparation method

A high acid-resistant, aluminum-plastic film technology, applied in the direction of lithium batteries, battery pack components, chemical instruments and methods, etc., can solve the problem of poor acid corrosion resistance of surface heat-resistant resins, surface dissolution of aluminum-plastic films, and resistance to electrolysis Liquid and other problems, to achieve good hydrofluoric acid resistance, improve puncture resistance strength, improve the effect of barrier properties
CN111370599AInactive Publication Date: 2020-07-03CHENDU NEW KELI CHEM SCI CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHENDU NEW KELI CHEM SCI CO LTD
Publication Date
2020-07-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of lithium battery packaging films, and discloses a high-acid-resistance aluminum-plastic film for a lithium battery and a preparation method. The preparation methodcomprises the following steps: (1) mixing polyphenylene sulfide pure resin, a terephthalate solvent, carbon fibers, a heat stabilizer and an antioxidant, extruding, casting, cooling and forming a film to obtain a polyphenylene sulfide / carbon fiber film; (2) carrying out dry composite film forming on the polyethylene glycol terephthalate film and the polyphenylene sulfide / carbon fiber film to obtain a composite protective layer; and (3) coating two sides of the aluminum foil layer with an adhesive, and respectively compounding with the polyphenylene sulfide film and the casting polypropylene film to obtain the high-acid-resistance aluminum-plastic film for the lithium battery. The aluminum-plastic film prepared by the invention has excellent acid resistance, can effectively prevent the corrosion of an electrolyte, and has good puncture resistance, tensile strength and wear resistance, so that the yield and reliability of the battery are improved, and the service life of the battery isgreatly prolonged.
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Description

technical field

[0001] The invention relates to the field of lithium battery packaging films, and discloses a high acid-resistant aluminum-plastic film for lithium batteries and a preparation method. Background technique

[0002] With the rise of new energy vehicles in recent years, the demand for long-life, large-capacity, high-power power batteries is increasing. The polymer lithium-ion battery has natural safety, and the shape is free, it is very convenient to make a large and thin battery, which is not only convenient to make a large-capacity lithium-ion battery cell, but also conducive to the heat dissipation of the battery. Therefore, it becomes the first choice for power batteries. Correspondingly, the polymer power battery has put forward higher requirements on the reliability and service life of the aluminum-plastic packaging film of its packaging material.

[0003] Flexible packaging aluminum-plastic film is an important raw material for polymer lithium-ion batte...

Claims

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