Special adhesive tape for energy storage and power lithium battery and production method of special adhesive tape

Abstract

The invention relates to a special adhesive tape for an energy-storage or power lithium battery and a production method of the special adhesive tape. The adhesive tape comprises an adhesive layer, a hardened coating layer, a base layer and a release layer which are sequentially distributed. The base layer is a polyester thin film. The hardened coating layer is an epoxy resin layer and is coated on the front surface of the base layer. The release layer is a single-component non-silicon release agent coating layer and is arranged on the back surface of the base layer. The adhesive layer is arranged on the outer surface of the hardened coating layer. The adhesive tape is provided with a four-layer structure and each layer has a respective function, wherein the adhesive layer is in direct contact with the terminating part of the battery and has the characteristics that the adhesive layer is firm in bonding, is electrolyte-resistant and halogen-free and satisfies (RoHS) Restriction of Hazardous Substances requirements and the like; the hardened coating layer further improves the puncture strength of the base layer; the base layer can be prevented from being punctured by burrs on pole pieces; the release layer has an excellent adhering property and a quick drying performance similar to the base layer. The special adhesive tape for an energy-storage or power lithium battery has the advantages that the adhesive tape is environmentally-friendly, the RoHS requirements are satisfied, the electrolyte resistance is good and the like, and is mainly used for the insulation and the protection of the terminating part of the lithium battery.

Description

technical field [0001] The invention relates to an adhesive tape specially used for the insulation and protection of the termination part of a lithium battery, in particular to a safety and environmental protection type energy storage and power lithium battery special adhesive tape with electrolyte resistance and super puncture strength and its production method. Background technique [0002] At present, only a few Japanese companies such as Teraoka and Nitto can produce such tapes (adhesive tapes for energy storage and power lithium batteries) in the world, and they are in a monopoly position in the Chinese market. In the past two years, because the EU has formulated strict environmental protection regulations for electronic products, these products no longer meet the EU's environmental protection requirements and face the dilemma of gradually withdrawing from the market. Therefore, it has always been in a market monopoly position. Domestic enterprises spend a large amoun...

AI Technical Summary

Problems solved by technology

[0004] At present, the products that domestic manufacturers can provide are imitated by a few small companies. The quality and performance indicators are far from being comparable to imported products. The raw materials are not environmentally friendly, poor viscosity, reduced peeling force, low temperature resistance, Due to the disadvantages of easy degumming of the adhesive, the base material does not meet the expected characteristics, etc., the performance is difficult to meet the use requirements, and it does not meet environmental protection and safety, and it is even more difficult to adjust the product variety and performance to meet the needs of the market.

At present, there are few domestic enterprises engaged in the production and research and development of products in this field. The product lines of domestic companies involved in this technology have not produced products that can completely replace imported products, and the performance indicators do not comply with the EU's ROHS ban and Sony's environmental regulations. directives and halogen requirements, etc.

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