关键词: 动力电池；热管理；微通道冷却

Abstract: For the battery to effectively thermal management, this paper proposes a thermal management method using microchannel liquid cooling. Based on COMSOL software, a simulation study of a lithium iron phosphate flexible battery was conducted to analyze the influence of coolant flow rate and coolant inlet temperature on the cooling performance of the battery module at different discharge rates. The results show that the maximum temperature difference and maximum temperature of the battery pack can be controlled in the allowed range by cooling method.Increasing coolant flow can reduce the maximum temperature and temperature difference of the battery pack to a certain extent, but the loss of pumping power needs to be considered. Reducing the coolant inlet temperature is an effective way to reduce the maximum temperature of the battery module, and the coolant inlet temperature has little influence on the temperature consistency of the battery pack.

Key words: Power battery; Thermal management; Microchannel cooling