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Gas-absorbing inner-layer co-extrusion film for lithium battery flexible packaging and preparation method thereof

A gas adsorption and lithium battery technology, applied in packaging, wrapping paper, electrical components, etc., can solve the problems of flatulence damage, short service life of lithium batteries, poor air tightness of polypropylene film, etc., to prevent gas failure and avoid Integral destruction, avoiding pollution effect

Active Publication Date: 2018-06-01
无锡华精新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polypropylene film has poor airtightness and is prone to flatulence damage during lithium battery storage
The lithium battery with heat-sealed barrier layer has a short service life

Method used

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  • Gas-absorbing inner-layer co-extrusion film for lithium battery flexible packaging and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Such as figure 1 As shown, the gas adsorption type inner co-extruded film for lithium battery packaging of the present invention is sequentially composed of a gas adsorption layer, an adhesive layer, a barrier layer, a mechanical support layer, and a heat seal layer from the outside to the inside. The gas adsorption layer is composed of an oxygen adsorption layer and a carbon dioxide adsorption layer. among them,

[0055] The oxygen adsorption layer contains the following parts by mass of raw materials:

[0056] 90 parts of polyethylene terephthalate;

[0057] 13 parts of hydroxyl-terminated polybutadiene / maleic anhydride esterified oxygen absorbent;

[0058] 0.1 part of cobalt acetate catalyst;

[0059] The carbon dioxide adsorption layer contains the following parts by mass of raw materials:

[0060] 95 parts of polyethylene terephthalate;

[0061] Metal-organic framework material zeolite imidazole-based framework material 0.5 parts.

[0062] The adhesive layer is an acid-modif...

Embodiment 2

[0087] Such as figure 1 As shown, the gas adsorption type inner co-extruded film for lithium battery packaging of the present invention is sequentially composed of a gas adsorption layer, an adhesive layer, a barrier layer, a mechanical support layer, and a heat seal layer from the outside to the inside. The gas adsorption layer is composed of an oxygen adsorption layer and a carbon dioxide adsorption layer. among them,

[0088] The oxygen adsorption layer contains the following parts by mass of raw materials:

[0089] 93 parts of polyethylene terephthalate;

[0090] 15 parts of 1,4-butenediol / maleic anhydride ester;

[0091] 0.08 parts of cobalt acetate catalyst;

[0092] The carbon dioxide adsorption layer contains the following parts by mass of raw materials:

[0093] 92 parts of polyethylene terephthalate;

[0094] 1.6 parts of metal-organic framework material zeolite-like imidazole-based framework material.

[0095] The adhesive layer is an acid-modified polyolefin adhesive.

[0096...

Embodiment 3

[0121] Such as figure 1 As shown, the gas adsorption type inner co-extruded film for lithium battery packaging of the present invention is sequentially composed of a gas adsorption layer, an adhesive layer, a barrier layer, a mechanical support layer, and a heat seal layer from the outside to the inside. The gas adsorption layer is composed of an oxygen adsorption layer and a carbon dioxide adsorption layer. among them,

[0122] The oxygen adsorption layer contains the following parts by mass of raw materials:

[0123] 95 parts of polyethylene terephthalate;

[0124] 10 parts of 1,4-butenediol / methyltetrahydrophthalic anhydride esterified oxygen absorbent;

[0125] 0.05 parts of cobalt acetate catalyst;

[0126] The carbon dioxide adsorption layer contains the following parts by mass of raw materials:

[0127] 90 parts of polyethylene terephthalate;

[0128] 3 parts of metal-organic framework material zeolite-like imidazole-based framework material.

[0129] The adhesive layer is an aci...

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Abstract

The invention discloses a gas adsorption type inner-layer co-extrusion membrane for packaging of a lithium battery and a preparation method of the gas adsorption type inner-layer co-extrusion membrane, and particularly provides an inner-layer co-extrusion membrane, contacted with a polymer electrolyte solution, of a polymer lithium battery inner layer and a preparation method of the inner-layer co-extrusion membrane. The gas adsorption type inner-layer co-extrusion membrane is characterized by comprising a gas adsorption layer, an adhesion layer, a separation layer, a mechanical support layer and a hot sealing layer from outside to inside sequentially. The gas adsorption type inner-layer co-extrusion membrane is prepared through preparation of raw materials of all layers and co-extrusion of the adjacent layers. With the adoption of the gas adsorption type inner-layer co-extrusion membrane and the preparation method, the conditions of integral damage and liquid leakage of the flexible packaging can be avoided, the safety of the lithium battery is improved, and the service life of the lithium battery is prolonged.

Description

Technical field [0001] The invention relates to a lithium battery soft packaging material and a preparation method thereof. Specifically, it is an inner co-extruded film in which the inner layer of a polymer lithium battery is in contact with a polymer electrolyte solution and a preparation method thereof. Background technique [0002] It is known in the battery production industry that polymer batteries are the most advanced secondary batteries in the world today. They have the advantages of high specific energy and fast charging and discharging speeds. They have gradually replaced lithium-ion batteries and are used in mobile phones, notebook computers, MP3, Digital products such as PDA and DV have gradually become indispensable supplies in people's work and life. The safety of the battery is the most important factor affecting the application of the battery, and the swelling phenomenon of the lithium battery is the main factor affecting the safety of the battery, causing the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/18B32B27/08B32B7/10B32B27/32B32B33/00B32B37/12B32B38/00B32B38/16H01M2/02B29D7/01B65D65/40
CPCY02E60/10
Inventor 丘晓琳吴宇涛傅苗苗张李璇陈臻杰富坚定
Owner 无锡华精新材股份有限公司
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