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Pressure-sensitive adhesive tape for battery

A pressure-sensitive adhesive and pressure-sensitive adhesive layer technology, applied in the direction of batteries, secondary batteries, battery pack components, etc., can solve problems such as difficulty in maintaining battery output, increased reactivity, and electrolyte degradation, and achieve high Stability and reliability, excellent productivity, effect of suppressing deterioration

Inactive Publication Date: 2012-07-11
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the saturated hydrocarbon resin used for imparting adhesive properties, it is not easy to completely remove impurities having double bonds in its structure due to manufacturing reasons, and the battery slowly deteriorates during repeated charging / discharging processes under high voltage conditions
Due to the increased reactivity between the pressure-sensitive adhesive layer in the battery and the electrolyte in batteries with higher capacitance and higher output, deterioration of the electrolyte will occur more easily, making it difficult to maintain the battery Output

Method used

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  • Pressure-sensitive adhesive tape for battery
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  • Pressure-sensitive adhesive tape for battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Coating solution 1 was prepared by diluting 100 parts by weight of polyisobutylene rubber having a weight average molecular weight of 2,000,000 (trade name: "Oppanol B200", manufactured by BASF Japan Ltd.) with toluene.

[0067] The obtained coating solution 1 was applied to a polypropylene film having a thickness of 30 μm at the inside from both edges by 0.5 mm or more so that the thickness after drying was 15 μm, and the solution was dried to thereby obtain a pressure-sensitive adhesive tape 1 .

Embodiment 2

[0069] A pressure-sensitive adhesive tape 2 was obtained in the same manner as in Example 1 except that the thickness of the pressure-sensitive adhesive layer was changed from 15 μm to 10 μm after drying.

Embodiment 3

[0071] A pressure-sensitive adhesive tape 3 was obtained in the same manner as in Example 1 except that the thickness of the pressure-sensitive adhesive layer was changed from 15 μm to 2 μm after drying.

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Abstract

The present invention relates to a pressure-sensitive adhesive tape for a battery, containing: a substrate; and a pressure-sensitive adhesive layer laminated on at least one surface of the substrate, in which the pressure-sensitive adhesive layer contains a rubber component in the content of 70 wt% or more, and the rubber component has a weight average molecular weight of 300,000 to 5,000,000, and in which the pressure-sensitive adhesive layer is laminated at an inner portion of 0.5 mm or more from both edges of the substrate, with a thickness of 1 to 25 [mu]m.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive tape for batteries, and more particularly, to a pressure-sensitive adhesive tape for batteries for preventing short circuit by sticking the tape to the inside of a battery such as a lithium ion battery. Background technique [0002] In recent years, secondary batteries such as lithium ion batteries have become indispensable as power sources for mobile devices such as cellular phones or portable computers. In addition, since lithium ion batteries have high capacitance and are light in weight, lithium ion batteries are expected to be used as batteries for electric vehicles, and manufacture of higher capacitance batteries is required from now on. [0003] As the capacity of lithium ion batteries becomes higher, especially in the case of wound type batteries, the number of windings of the wound electrode plate tends to increase. Therefore, thinner separators are mainly used. However, in the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J123/20H01M2/16H01M4/13H01M50/489H01M50/586
CPCH01M2/14C09J2203/33H01M2200/00H01M10/0525H01M10/0587H01M2/08H01M10/0431Y02E60/122H01M2/34C09J123/22C09J7/021C09J2421/00C09J2201/28C09J2423/00H01M2/1673C09J2201/622C09J7/381C08L23/22C08L2205/025Y10T428/24752C09J2301/204C09J2301/312Y02E60/10H01M50/46Y02P70/50H01M50/586H01M50/489C09J7/22C09J7/30H01M50/256H01M50/40H01M50/572
Inventor 岩田淳花井启臣新谷寿朗
Owner NITTO DENKO CORP
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