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Battery packaging laminate

A battery outer packaging and laminate technology, which is applied to battery boxes/jackets, battery pack components, battery box/cover materials, etc., can solve problems such as low production efficiency of storage containers, and prevent pinholes and interlayer peeling. , The effect of maintaining the compressive strength and preventing the occurrence of pinholes

Active Publication Date: 2014-09-17
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production efficiency of storage containers such as lithium-ion batteries is low due to such defective phenomena during molding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0103] On the surface of the 40 μm thick aluminum foil on which the multilayer sealant film is bonded, 1% by weight of an amorphous polymer having a hydroxyl-containing polyvinyl alcohol skeleton (trade name "G Polymer Resin") was dissolved. ", manufactured by Nippon Synthetic Chemicals Co., Ltd.) and an aqueous solution of 2% by weight of chromium (III) fluoride, coated with a gravure coater so that the thickness after drying becomes 0.6 μm, and the corrosion-resistant coating layer is laminated Afterwards, it is further heated in an oven at 200°C to carry out a cross-linking reaction, thereby firing on the aluminum foil.

[0104] Furthermore, a multilayer sealant film is thermally laminated on the corrosion-resistant coating layer laminated on the aluminum foil using a heating roll in the processing line. Next, the thermally laminated laminate is passed through a cooling roll, and the temperature of the thermally laminated laminate is rapidly lowered at a cooling rate of 10° C...

Embodiment 2）

[0111] On the surface of the 40 μm thick aluminum foil on which the multilayer sealant film is bonded, 1% by weight of an amorphous polymer having a hydroxyl-containing polyvinyl alcohol skeleton (trade name "G Polymer Resin") was dissolved. ", manufactured by Nippon Synthetic Chemical Co., Ltd.) and an aqueous solution of 2% by weight of chromium (III) fluoride were applied so that the thickness after drying was 0.6 μm, and the corrosion-resistant coating layer was laminated, and further dried at 200°C Heating in an oven for cross-linking reaction, thus firing on aluminum foil.

[0112] In addition, the multilayer sealant film is thermally laminated on the corrosion-resistant coating layer laminated on the aluminum foil using a heating roll in the processing line, and then the thermally laminated laminate is passed through the cooling roll to obtain A cooling rate of 10° C. / sec or more rapidly lowers the temperature of the thermally laminated laminate to rapidly cool it.

[...

Embodiment 3）

[0121] On the surface of the 40 μm thick aluminum foil on which the multilayer sealant film is bonded, 1% by weight of an amorphous polymer having a hydroxyl-containing polyvinyl alcohol skeleton (trade name "G Polymer Resin") was dissolved. ", manufactured by Nippon Synthetic Chemicals Co., Ltd.) and an aqueous solution of 2% by weight of chromium (III) fluoride were applied using a gravure coater so that the thickness after drying was 0.6 μm, and the corrosion-resistant coating was laminated Floor. It is further heated in an oven at 200°C to carry out a cross-linking reaction, thereby firing on the aluminum foil.

[0122] Furthermore, on the corrosion-resistant coating layer laminated on the aluminum foil, except that the multilayer sealant film was bonded by thermal lamination using a heating roll in the processing line, it was carried out in the same manner as in Example 1, and Example 3 was obtained. laminated body for battery packaging. The tensile elongation at break,...

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Abstract

The invention aims to provide a battery packaging laminate at a low cost, wherein the laminate can reduce reduction of the laminate strength between aluminum foil and a multilayer sealant film and interlayer peeling induced by electrolyte deterioration of a lithium ion battery and can produce a packaging container with a high yield. A substrate layer (11), aluminum foil (12), and a multilayer sealant film (17) formed by lamination of a metal-object heat-adhesive resin layer (16) and a polyolefin resin layer (13), are laminated in the battery packaging laminate (10). A corrosion-resistant coating layer (14) is formed at least on the surface of the aluminum foil (12) attached to the multilayer sealant film (17). The multilayer sealant film (17) is attached to the corrosion-resistant coating layer (14) through the metal-object heat-adhesive resin layer (16), the melting heat of which is smaller than 25 mJ / mg.

Description

technical field [0001] The present invention relates to a battery outer packaging laminate used as an outer packaging material for secondary batteries such as lithium ion batteries and electric double layer capacitors (hereinafter referred to as "capacitors"). Background technique [0002] In recent years, the spread of electric vehicles and the effective use of natural energy such as wind power generation and solar power generation have become issues while global environmental problems have increased. Accordingly, in these technical fields, secondary batteries such as lithium ion batteries and capacitors have attracted attention as storage batteries for storing electric energy. In addition, outer packaging containers for storing lithium-ion batteries used in electric vehicles and the like are made of laminates for battery outer packaging in which aluminum foil and resin films are laminated, and are formed by flat bag molding, deep-drawing molding, or A molded container mad...

Claims

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Application Information

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IPC IPC(8): H01M2/02B32B15/20B32B15/08B32B15/085
CPCY02E60/122B32B15/08B32B15/085B32B15/20H01M50/116H01M50/124Y02E60/10B32B2255/06B32B2255/26B32B2311/24B32B2457/10H01G11/78
Inventor 饭塚宏和武井邦浩金田康宏稻田正和
Owner FUJIMORI KOGYO CO LTD
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