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Packaging material for electrochemical device and electrochemical device

An electrochemical and outer layer technology, applied in the direction of circuits, electrical components, battery pack components, etc., can solve the problems that cannot prevent electrolyte diffusion, leakage, and moisture intrusion, etc., and achieve excellent electrolyte diffusion prevention, excellent Moisture barrier properties, the effect of inhibiting moisture intrusion from the outside

Inactive Publication Date: 2015-09-16
SHOWA DENKO PACKAGING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of pinholes, the aluminum foil will not be able to function as a shielding layer, so that it will not be able to prevent the intrusion of external moisture, and problems such as the diffusion and leakage of the electrolyte will not be prevented.

Method used

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  • Packaging material for electrochemical device and electrochemical device
  • Packaging material for electrochemical device and electrochemical device
  • Packaging material for electrochemical device and electrochemical device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] A chemical compound formed by coating phosphoric acid, polyacrylic acid (acrylic acid is a resin), chromium (III) salt compound, water, and alcohols on both sides of a flexible aluminum foil (flexible aluminum alloy foil specified in JIS A8079) with a thickness of 15 μm. After treating the solution, drying was performed at 150° C. to prepare an aluminum foil having a chemical conversion film formed on both surfaces. The amount of chromium attached to the chemical film is 5mg / m on one side 2 .

[0090] Then, on the surface of one side of the aluminum foil 4 with the chemical conversion film formed on both sides, apply a two-component curable polyester-urethane resin adhesive and dry to form the first adhesive layer 5. The surface of the adhesive layer 5 is vapor-deposited with a thickness of The non-evaporation surface of the biaxially stretched polyester film 2 with a thickness of 12 μm of the aluminum evaporation layer 7 is bonded, and at the same time, the surface ...

Embodiment 2

[0092] Except that the soft aluminum alloy foil with a thickness of 7 μm is used instead of the soft aluminum alloy foil with a thickness of 15 μm, it is the same as in Example 1 to obtain the following figure 1 The shown exterior material 1 for an electrochemical device.

Embodiment 3

[0094] In addition to using thickness The thickness of the aluminum oxide evaporated layer 7 replaces the Except for the aluminum evaporation layer 7, it is the same as in Example 1, and obtains as figure 1 The shown exterior material 1 for an electrochemical device.

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Abstract

The invention provides a packaging material for an electrochemical device, comprising an outside layer (10), a thermoplastic resin not extending film layer (3), and a metal foil layer (4) configured between the outside layer (10) and the inside layer (3), wherein the outside layer (10) comprises a heat resistance resin film layer (2), and an evaporation layer (7) stacked on the internal surface or / and the external surface of the heat resistance resin film layer. According to the invention, the packaging material is light enough, and can restrain water from the outside, and meanwhile avoid electrolyte diffusion.

Description

technical field [0001] The present invention relates to a thin and lightweight exterior material used for batteries and capacitors used in portable devices such as smartphones and tablet computers, or for hybrid electric devices and electrochemical devices covered by the exterior material. Electrochemical devices such as batteries and capacitors used in vehicles, electric vehicles, wind power generation, solar power generation, and nighttime power storage. [0002] In addition, in this specification, the "outer layer" does not mean that it is the outermost layer of an exterior material, but it means arrange|positioning outside a metal foil layer. [0003] In addition, in this specification, the meaning of "aluminum" includes aluminum and its alloy. Background technique [0004] With the reduction in thickness and weight of mobile electronic devices such as smartphones and tablet terminals, as the exterior of electrochemical devices such as lithium-ion batteries, lithium-pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02
CPCH01M50/124H01M50/1245Y02E60/10Y02P70/50H01M50/119H01M50/121H01M50/133H01M50/126H01M50/141
Inventor 南谷广治
Owner SHOWA DENKO PACKAGING CO LTD
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