High-performance environment-friendly UV adhesive for battery and preparation method thereof

By developing environmentally friendly UV glue with low viscosity, high thixotropy and fast curing, the problems of large space occupation, low production efficiency and low energy density in the edge sealing technology of soft-pack battery are solved, and efficient and environmentally friendly edge sealing effect is achieved, enhancing the performance and safety of the battery.

CN119662201APending Publication Date: 2025-03-21STEADYCHEM (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202411916326.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

The existing soft-pack battery edge sealing technology has problems such as large space occupation, low production efficiency, low energy density and complex edge sealing structure, which is difficult to meet the needs of high energy density and miniaturization.

Method used

Develop a low viscosity, high thixotropy, fast curing environmentally friendly UV glue. By optimizing the composition of acrylate prepolymer, the design of composite flexible and hard polyols is adopted to form a crosslinked structure to improve heat resistance and durability.

Benefits of technology

It has achieved simplification of production processes, saving edge sealing space, improving battery energy density, enhancing battery performance and safety, avoiding the problems of increasing size and low production efficiency of traditional edge sealing technology.

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Abstract

The invention discloses a high-performance environment-friendly UV (ultraviolet) adhesive for batteries and a preparation method thereof, and the UV adhesive is prepared from the following raw materials in parts by weight: 20-50 parts of acrylate prepolymer, 30-70 parts of first acrylate monomer, 1-10 parts of photoinitiator, 5-15 parts of thixotropic agent and 0.5-5 parts of other auxiliaries, the acrylate prepolymer is prepared from the following raw materials: compound polyol, isocyanate and a second acrylate monomer; the compound polyol comprises a flexible polyol and a hard polyol which are compounded according to a molar ratio of 1: (1-5). According to the high-performance environment-friendly UV adhesive for the battery, the viscosity is smaller than 5000 cps, Tg is larger than or equal to 70 DEG C, the elongation at break is larger than or equal to 550%, the shear strength is larger than or equal to 5 MPa, and the resistivity is larger than or equal to 109 omega.m. The UV adhesive disclosed by the invention has the characteristics of low viscosity, high thixotropy, convenience in sizing, short curing time, good flexibility of cured adhesive, high bonding strength and excellent heat resistance and insulating property.
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