Pressure-sensitive adhesive tape for battery

Abstract

The present invention relates to a pressure-sensitive adhesive tape for battery containing: a substrate and a pressure-sensitive adhesive layer laminated on at least one surface of a substrate, in which the pressure-sensitive adhesive layer is laminated on the substrate, 0.5 mm or more inside from both edges of the substrate, and in which the pressure-sensitive adhesive tape has a 180 DEG peeling pressure-sensitive adhesive force at 23 DEG C being 0.1 N / 10 mm or more, and has a slippage distance after a pressure-sensitive adhesive layer side of the pressure-sensitive adhesive tape is attached to a phenolic resin plate (attaching area: 10 mm * 20 mm), followed by applying a load of 500 g thereto at 40 DEG C for 1 hour being 0.2 mm or less.

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 preventing short circuit by sticking the tape to the inside of a battery such as a lithium ion battery. Background technique [0002] Recently, secondary batteries such as lithium ion batteries are indispensable as power sources for mobile devices such as portable phones or laptop computers. In addition, since lithium ion batteries have high capacity and light weight, they are highly expected to be used as batteries for electric vehicles and improvement in battery capacity is required in the future. [0003] As the capacity of lithium ion batteries becomes higher, particularly in the case of wound type batteries, the number of windings of electrode plates tends to increase. Therefore, the separator mainly used becomes thinner. However, as the separator becomes thinner, there arises a problem that holes ma...

AI Technical Summary

Problems solved by technology

However, as the separator becomes thinner, there arises a problem that holes may be formed in the separator due to very few impurities introduced into the battery during the battery manufacturing process or due to burrs present on the electrode plate, which may be formed on the positive electrode plate. short-circuit with the negative plate to generate heat, which can cause, for example, a fire

However, in the saturated hydrocarbon resin used for imparting adhesiveness, it is difficult to completely eliminate 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 increase in reactivity between the pressure-sensitive adhesive layer in the battery and the electrolyte in batteries with higher capacity and higher output, deterioration of the electrolyte is more likely to occur, which makes it difficult to maintain the output of the battery

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