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Adhesive tape for protecting electrode plate

A technology of adhesive tape and electrode plate, applied in the direction of film/sheet adhesive, adhesive, repair/maintenance of secondary battery, etc., can solve problems such as heat generation, and achieve the effect of high safety

Active Publication Date: 2012-03-21
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that during the manufacturing process, the separator is opened due to very small foreign matter mixed into the inside of the battery or burrs on the electrode plate, and a short circuit occurs between the positive electrode plate and the negative electrode plate. Heat and cause fire accidents, etc.

Method used

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  • Adhesive tape for protecting electrode plate
  • Adhesive tape for protecting electrode plate
  • Adhesive tape for protecting electrode plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] 100 parts by weight of polyisoprene rubber (trade name "KRATONIR-307", manufactured by Kraton Polymers Japan Ltd., weight average molecular weight: 2.76×10 6 ) was diluted to obtain the coating solution (1).

[0095] The resulting coating solution (1) was applied to a polyimide film (trade name "Kapton 50H", manufactured by DU PONT-TORAY CO., LTD.) having a thickness of 13 μm and dried so that the thickness after drying was 10 μm to obtain an adhesive tape (1).

Embodiment 2

[0097] Instead of a polyimide film with a thickness of 13 μm (trade name “Kapton 50H”, manufactured by DU PONT-TORAY CO., LTD.), a polyimide film with a thickness of 25 μm (trade name “Kapton 100H”, manufactured by DU PONT - TORAY CO., LTD. manufacture), except that, it carried out similarly to Example 1, and obtained the adhesive tape (2).

Embodiment 3

[0099] Instead of a polyimide film with a thickness of 13 μm (trade name “Kapton 50H”, manufactured by DU PONT-TORAY CO., LTD.), a polyimide film with a thickness of 50 μm (trade name “Kapton 200H”, manufactured by DU PONT-TORAY CO., LTD.) was used. - TORAY CO., LTD. manufacture), except the above, it carried out similarly to Example 1, and obtained the adhesive tape (3).

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Abstract

The present invention relates to an adhesive tape for protecting an electrode plate, which has a piercing resistance even in a contact with a burr, and can maintain effect of preventing short circuit so as to prevent from being stripped from the electrode plate even under high temperature. The adhesive tape for protecting an electrode plate is characterized in that: the adhesive tape is provided with an adhesive layer on at least one surface of a base material, wherein the piercing resistance is 300 gfmm or more; and has a heat shrinkage ratio, when heating is performed at 260 DEG C for 1 hour, of 1.0% or less in both of TD (width) direction and MD (length) direction.

Description

technical field [0001] The present invention relates to an adhesive tape for electrode plate protection. Specifically, it relates to an adhesive tape used for the purpose of being attached to the inside of a battery such as a lithium ion battery for the purpose of preventing a short circuit. Background technique [0002] Currently, secondary batteries such as lithium-ion batteries are indispensable as power sources for mobile devices such as mobile phones and notebooks. In addition, since lithium-ion batteries are high-capacity and light-weight, they are expected to be used as storage batteries for electric vehicles, and further increases in capacity are required in the future. [0003] With the increase in capacity of lithium-ion batteries, the number of wound electrode plates tends to increase especially in wound-type batteries, and the use of thinner separators has become mainstream. However, there is a problem that during the manufacturing process, the separator is open...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02H01M10/42C09J7/38
CPCC09J2479/086C09J7/38Y10T428/28Y02E60/10C09J7/22C09J7/30C09J2203/33C09J2301/312H01M50/579
Inventor 岩田淳神谷充花井启臣
Owner NITTO DENKO CORP