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Elastic aluminium-plastic film used for flexible package of lithium battery and production method

An aluminum-plastic film and flexible packaging technology, which is applied in the field of elastic aluminum-plastic film for lithium battery flexible packaging and its preparation, can solve problems such as affecting the safety and service life of lithium batteries, micro-cracks in the aluminum foil layer, and easy corrosion of the outer layer of the aluminum-plastic film. , to achieve the effect of improving safety and service life, improving corrosion resistance and good elasticity

Inactive Publication Date: 2020-02-04
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the above, the outer layer of the aluminum-plastic film used for lithium batteries in the existing solutions is easy to corrode, and it is easy to generate bubbling and cause microcracks in the aluminum foil layer, which affects the safety and service life of the lithium battery. The present invention proposes a lithium battery Elastic aluminum-plastic film for flexible packaging and its preparation method, which can effectively solve the above-mentioned technical problems

Method used

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  • Elastic aluminium-plastic film used for flexible package of lithium battery and production method
  • Elastic aluminium-plastic film used for flexible package of lithium battery and production method
  • Elastic aluminium-plastic film used for flexible package of lithium battery and production method

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Effect test

Embodiment 1

[0034] (1) Add the heat-resistant resin and the first bonding material into the screw extruder, and form a film by co-extrusion casting to obtain the outer protective layer of the nylon cast film; the heat-resistant resin is nylon 6; the first bonding The material is epoxy resin; the addition of the first bonding material is 10% of the mass of the heat-resistant resin;

[0035] (2) As attached figure 1 As shown, the nylon cast film outer protective layer 1, the fluororubber microporous foam layer 2, the first adhesive layer 3, the aluminum foil layer 4, the PP coating layer 5, and the CPP film heat sealing layer are arranged in order from outside to inside The order of 6 is stacked and compounded, and the layers are bonded by adhesive to obtain an elastic aluminum-plastic film for lithium battery flexible packaging; the fluororubber is fluororubber 26; the fluororubber microporous foam layer contains zinc oxide; the addition of zinc oxide The amount is 3% of the mass of fluor...

Embodiment 2

[0039] (1) Add the heat-resistant resin and the first bonding material into the screw extruder, and form a film by co-extrusion casting to obtain the outer protective layer of the nylon cast film; the heat-resistant resin is nylon 12; the first bonding The material is silicone resin; the addition of the first bonding material is 5% of the mass of the heat-resistant resin;

[0040] (2) Set up the outer protective layer 1 of the nylon cast film, the microporous foam layer 2 of the fluorine rubber, the first adhesive layer 3, the aluminum foil layer 4, the PP coating layer 5, and the heat sealing layer of the CPP film in sequence from the outside to the inside The sequence of 6 is stacked and compounded, and the layers are bonded by adhesive to obtain an elastic aluminum-plastic film for lithium battery flexible packaging; the fluororubber is perfluoroether rubber; the microporous foam layer of the fluororubber contains alumina; the aluminum oxide The amount added is 4% of the ma...

Embodiment 3

[0044] (1) Add the heat-resistant resin and the first bonding material into the screw extruder, and form a film by co-extrusion casting to obtain the outer protective layer of the nylon cast film; the heat-resistant resin is nylon 1010; the first bonding The material is epoxy resin; the addition of the first bonding material is 15% of the mass of the heat-resistant resin;

[0045] (2) Set up the outer protective layer 1 of the nylon cast film, the microporous foam layer 2 of the fluorine rubber, the first adhesive layer 3, the aluminum foil layer 4, the PP coating layer 5, and the heat sealing layer of the CPP film in sequence from the outside to the inside The order of 6 is stacked and compounded, and the layers are bonded by adhesive to obtain an elastic aluminum-plastic film for lithium battery flexible packaging; the fluororubber is tetrapropylene fluororubber; the fluororubber microporous foam layer contains magnesium oxide; the magnesium oxide The amount added is 5% of t...

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Abstract

The invention relates to the field of lithium batteries, and discloses an elastic aluminium-plastic film used for a flexible package of a lithium battery and a production method. The production methodcomprises the following production process: (1) adding heat-resisting resin and a first binding material into a screw extruder, and conducting coextrusion casting and film-forming to obtain a nylon cast film outer protection layer; and (2) sequentially arranging the nylon cast film outer protection layer 1, a fluororubber microcellular foam layer 2, a first adhesive layer 3, an aluminium foil layer 4, a PP lamination layer 5 and a CPP film heat sealing layer 6 from outside in for lamination and compounding, and bonding the layers through an adhesive to produce the elastic aluminium-plastic film used for the flexible package of the lithium battery. Compared with an ordinary aluminium-plastic film, the produced elastic aluminium-plastic film has good elastic performance, bubbles on surfacesof the lithium battery are effectively avoided, micro-cracks of the aluminium foil layer in the aluminium-plastic package film are prevented, and meanwhile, the corrosion-resistant performance is good, so that the use safety of the aluminium-plastic film of the lithium battery is significantly improved, and the service life of the aluminium-plastic film of the lithium battery is significantly prolonged.

Description

technical field [0001] The invention relates to the field of lithium batteries, and discloses an elastic aluminum-plastic film for flexible packaging of lithium batteries and a preparation method thereof. Background technique [0002] With the rise of new energy vehicles in recent years, the demand for long-life, large-capacity, and high-power power batteries is increasing. Polymer lithium-ion batteries are naturally safe and free in shape. It is very convenient to make large and thin batteries. It is not only convenient to make large-capacity lithium-ion battery single cells, but also conducive to the heat dissipation of the battery. Therefore, it has become the first choice for power batteries. Correspondingly, polymer power batteries put forward higher requirements for the reliability and service life of their packaging materials, aluminum-plastic packaging films. [0003] So far, lithium batteries have been widely used in various small digital products due to their hig...

Claims

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Application Information

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IPC IPC(8): B32B27/34B32B25/08B32B27/06B32B7/12B32B15/20B32B15/06B32B15/085B32B27/08B32B33/00B32B25/04B32B3/08H01M2/02B29D7/01
CPCB29D7/01B32B3/08B32B5/18B32B7/12B32B15/046B32B15/06B32B15/085B32B15/20B32B27/065B32B27/08B32B27/34B32B33/00B32B2266/0207B32B2307/51B32B2307/714B32B2457/10H01M50/124Y02E60/10
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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