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Electrochemical battery packaging material

A packaging material, electrochemical technology, applied in the direction of battery box/sleeve material, battery pack components, battery box/jacket, etc. problems, to achieve the effect of increasing electrolytic resistance, ensuring no delamination, and increasing weather resistance

Active Publication Date: 2017-09-15
SUZHOU FIRST PV MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have great disadvantages: designing the printing layer outside the protective layer will smudge after the shell is punched, designing the printing layer on the metal foil layer and the protective layer / resin layer and coloring the adhesive will reduce the layer quality. Peeling strength even causes the protective layer to fall off
In addition, the existing protective layer of electrochemical battery packaging materials is mainly to ensure good formability of electrochemical battery packaging materials, but it is generally difficult to have chemical and solvent resistance. Risks in the outer layer of packaging materials, making the appearance of the product poor

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0026] This embodiment provides a packaging material for electrochemical cells, which includes a thermoplastic resin layer 3, a second adhesive layer 5, a metal foil layer 2, a first adhesive layer 4, a protective layer 1, and a metal foil layer 2 stacked in sequence. It has a first chemical treatment layer 2a in contact with the first adhesive layer 4 and a second chemical treatment layer 2b in contact with the second adhesive layer 5, and it also includes a layer formed on the protective layer 1 and the first adhesive layer. The color coating 6 between the layers 4 and the matt layer 7 formed on the outer surface of the protective layer 1; its preparation can be done in a conventional manner, as follows:

[0027] (a) Coating a chromate treatment solution (about 3% solid mass fraction) on the inner and outer surfaces of the metal foil layer 2 with a thickness of 30 μm, and drying in an oven at 150° C., thereby forming on both surfaces of the metal foil layer 2 Chromium conten...

Embodiment 2

[0034] This embodiment provides a packaging material for electrochemical cells, which is consistent with the raw material and structure in Embodiment 1, except that in step (b), carbon black with an average particle diameter of 1.5 μm: polyester polyol: ethyl acetate The ester is mixed evenly with sodium polyacrylate dispersant under the condition of mass fraction of 2:60:38 to obtain the main agent mixture of the colored coating. The mass fraction solid (including carbon black and polyester polyol) content rate of the above-mentioned colored coating main ingredient mixture is 20%, and the mass fraction solid content rate of the colored pigment (carbon black) is 10%.

Embodiment 3

[0036] This embodiment provides a packaging material for electrochemical cells, which is consistent with the raw material and structure in Embodiment 1, except that in step (b), carbon black with an average particle diameter of 1.5 μm: polyester polyol: ethyl acetate The ester is mixed evenly with sodium polyacrylate dispersant under the condition of mass fraction of 4:53.3:42.7 to obtain the main agent mixture of the colored coating. The mass fraction solid (including carbon black and polyester polyol) content rate of the above-mentioned colored coating main ingredient mixture is 20%, and the mass fraction solid content rate of the colored pigment (carbon black) is 20%.

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Abstract

The invention relates to an electrochemical battery packaging material. The electrochemical battery packaging material comprises a thermoplastic resin layer, a second bonding layer, a metal foil layer, a first bonding layer and a protective layer, wherein the metal foil layer is provided with a first chemical treatment layer contacted with the first bonding layer and a second chemical treatment layer contacted with the second bonding layer, and the electrochemical battery packaging material also comprises a coloring coating formed between the protective layer and the first bonding layer and a matte layer formed on the outer surface of the protective layer. Therefore, the coloring coating is not directly printed on the protective layer, but coloring pigments are added into a polyurethane adhesive and coated on the protective layer, so that adhesion is enhanced; and the chemical treatment layers are formed at the inner layer and the outer layer of the metal foil layer, and the chemical treatment layers can enhance electrolysis resistance of the packaging material and also can enhance weather resistance of the packaging material, so that no layering of the packaging material in high temperature and high humidity environments is guaranteed.

Description

technical field [0001] The invention belongs to the field of battery packaging materials, in particular to an electrochemical battery packaging material. Background technique [0002] Electrochemical batteries include lithium-ion batteries, polymer batteries, fuel cells, and power batteries. In recent years, electrochemical cell materials composed of multi-layer films have been widely used on the outer packaging of electrochemical cells. The most common packaging materials are basically composed of protective layers, adhesive layers, metal foil layers and thermoplastic resin layer. From the appearance point of view, this packaging material presents the color of the metal itself, resulting in a single appearance design and poor text prominence. In order to solve this problem, a printing layer can be designed outside the protective layer of the packaging material, a printing layer can be designed between the metal foil layer and the protective layer / resin layer, or the adhes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02B32B7/12B32B15/088B32B15/09B32B27/08B32B27/34B32B27/36B32B33/00
CPCB32B7/12B32B15/088B32B15/09B32B27/08B32B27/34B32B27/36B32B33/00B32B2307/554H01M50/116H01M50/124Y02E60/10
Inventor 付绪望余小玉陈静林建华
Owner SUZHOU FIRST PV MATERIAL CO LTD
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