Grid-based thermal management of cylindrical lithium-ion batteries

Abstract

Abstract In order to solve the problem of aging and thermal runaway of lithium-ion batteries under high temperature conditions, this paper established a liquid cooling system based on liquid cooling-phase change cooling system by setting up a "grid" liquid cooling system and studied the influence of different factors on lithium-ion battery packs through numerical simulation. The results show that: the liquid cooling with different flow directions is superior to the liquid cooling with the same flow direction, the maximum temperature difference is no more than 2.5 K, and the temperature of lithium-ion battery is uniformly distributed; when phase change material is added, the maximum temperature and the maximum temperature difference reach a reasonable range when the flow rate is half of the liquid cooling, which enhances the cooling effect.