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Outer covering for lithium-ion cell

A technology for lithium-ion batteries and packaging materials, which is applied in the direction of battery box/case materials, secondary batteries, electronic equipment, etc., can solve the problems of reduced productivity, limited speed, high processing unit price, etc., and achieve excellent deep drawing formability, The effect of high adhesion

Active Publication Date: 2015-12-30
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the treatment agents corrode the coating equipment, and there is a possibility of deterioration of the operating environment due to the constraints of the coating equipment.
In addition, in order to further improve the adhesion, there are cases where the process of immersing the aluminum foil in an acid bath or alkali bath, degreasing and etching is performed before the chemical conversion treatment with the treatment agent, but the treatment unit cost of this process is high. It becomes a rate-limiting process in the production of packaging materials for lithium-ion batteries, reducing productivity
[0016] In addition, in recent years, due to concerns about the impact on the environment, not only hexavalent chromium, which is currently known to be toxic, but also trivalent chromium may become the subject of restrictions. In this case, chromate-treated lithium batteries are used. Encapsulation materials may also be subject to restrictions, and the demand for parts that do not use chromium is gradually increasing

Method used

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  • Outer covering for lithium-ion cell
  • Outer covering for lithium-ion cell
  • Outer covering for lithium-ion cell

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0059] figure 1 It is a schematic sectional view of the laminated body which comprises the sealing material 1 which concerns on 1st Embodiment of this invention.

[0060] The encapsulating material 1 is formed by laminating an adhesive layer 12, a base treatment layer 13, an aluminum foil layer 14, an anti-corrosion treatment layer 15, an adhesive resin layer 16, and a sealant layer 17 sequentially on one side of a base material layer 11. body composition.

[0061] Since the encapsulating material 1 has the layer constitution as described above, performance required for an encapsulating material for lithium ion batteries can be exhibited.

[0062] In addition, in the packaging material 1, since the base treatment layer 13 containing specific components (A) to (C) in a specific content is provided at a position close to the base material layer 11 of the aluminum foil layer 14, the base material layer 11 and the aluminum foil Adhesion between layers 14 is improved. For examp...

no. 2 Embodiment approach

[0285] Next, a second embodiment of the packaging material of the present invention will be described. In addition, in this embodiment, the same code|symbol is attached|subjected to the component corresponding to 1st Embodiment, and the detailed description is abbreviate|omitted.

[0286] figure 2 It is a schematic sectional view of the laminated body which comprises the sealing material 2 of 2nd Embodiment of this invention.

[0287] The encapsulating material 2 is composed of sequentially laminating an adhesive layer 12, an adhesiveness improving layer 18, a base treatment layer 13, an aluminum foil layer 14, an anticorrosion treatment layer 15, an adhesive resin layer 16 and The sealant layer 17 is constituted as a laminated body.

[0288] That is, the sealing material 2 is the same as the sealing material 1 except that it has the adhesiveness improving layer 18 .

[0289] (adhesion improvement layer 18)

[0290] Adhesiveness improving layer 18 plays a role of further ...

no. 3 Embodiment approach

[0312] Next, a third embodiment of the packaging material of the present invention will be described. In addition, in this embodiment, the same code|symbol is attached|subjected to the component corresponding to 1st Embodiment, and the detailed description is abbreviate|omitted.

[0313] image 3 It is a schematic sectional view of the laminated body which comprises the sealing material 3 which concerns on the 3rd Embodiment of this invention.

[0314] The encapsulating material 3 is formed by sequentially laminating an adhesive layer 12 (first adhesive layer), a base treatment layer 13, an aluminum foil layer 14, an anti-corrosion treatment layer 15, and an adhesive layer 19 ( second adhesive layer) and the sealant layer 17 constitute a laminate.

[0315] That is, the sealing material 2 is the same as the sealing material 1 except that the adhesive layer 19 is included instead of the adhesive resin layer 16 .

[0316] (adhesive layer 19)

[0317] Like the adhesive resin l...

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Abstract

This outer covering for a lithium-ion cell comprises a laminate body obtained by laminating an adhesive layer, a surface-preparation layer, an aluminum foil layer, a corrosion-prevention-treatment layer, an adhesive resin layer, and a sealant layer in that order on one surface of a substrate layer. The surface-preparation layer contains a component (A), a component (B), and a component (C), all described below. The total amount of components (B) and (C) in relation to 100 mass parts of component (A) is 200-12000 mass parts. (A): A crosslinked resin formed from a resin (A1) having at least two nitrogen-containing functional groups, and a resin (A2) having reactive functional groups that react with the nitrogen-containing functional groups. (B): A rare-earth oxide. (C): Phosphoric acid or phosphoric acid salt.

Description

technical field [0001] The invention relates to a packaging material for a lithium ion battery. [0002] This application claims priority from Japanese Patent Application No. 2013-099608 filed in Japan on May 9, 2013, the contents of which are incorporated herein by reference. Background technique [0003] As a secondary battery for civilian use in portable terminal devices such as personal computers and mobile phones, and video cameras, lithium-ion batteries (also called lithium-ion secondary battery.). [0004] Metal cans are currently used as packaging materials for lithium-ion batteries. However, due to the advantages of light weight and the possibility of freely selecting the shape of the battery, in recent years, laminated films composed of multiple layers by cold forming (such as a heat-resistant substrate layer / aluminum foil layer / sealant ( A molded product obtained by deep drawing (hereinafter, referred to as "deep drawn molded product"). As a specific example, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02B32B15/08H01M50/105H01M50/119H01M50/121H01M50/129H01M50/133H01M50/145
CPCB32B15/08B32B7/12B32B15/20B32B27/281B32B27/308B32B27/42B32B2307/752B32B2457/10H01M10/0525Y02E60/10H01M50/124H01M50/1245H01M50/105H01M50/133H01M50/121H01M50/129H01M50/145H01M50/119B32B15/082B32B27/283B32B2255/06B32B2439/40B32B2457/16H01G11/78
Inventor 村田光司铃田昌由
Owner TOPPAN PRINTING CO LTD