Research on the influencing factors of hysteresis heat of rubber roller in battery pole piece calendering

Abstract

The calendering process of pole piece is a key step affecting the performance of the power battery. In the calendaring process, rubber roller materials will produce hysteresis heat, resulting in rolling resistance, which will lead to energy loss. The thermo‐mechanical coupling model for calendering rubber roller has been established and the effects of materials, calendering speeds, and roller structure shape on the viscoelastic temperature rise of rubber roller were analyzed. Solution‐polymerized styrene–butadiene rubber (SSBR) materials with different fillers have the greatest impact on temperature rise, followed by the roller shape, and calendering speed is smaller. The loss modulus of SSBR filled with white carbon black studied was smaller, and the temperature rise at high speed was 14.5°C higher than that at low speed. The optimized roller shape has a temperature rise of 10.4°C lower than the original shape. The research results could provide reference for the calendering rubber roller design of pole piece and similar processing.Highlights A thermo‐mechanical coupling model of calendering rubber roller was established. The rubber roller made of SSBR‐VN3 has a lower temperature rise. Optimized structure reduced contact pressure by 28.1% and temperature rise by 10.4°C.