Heat dissipation performance of electric vehicle battery liquid cooling system with double-inlet and double-outlet channels

Battery, as the main energy storage element, directly affects the performance of an electric vehicle. Battery thermal management research is required as the battery performance is obviously influenced by temperature. This article selects a liquid cooling system with double-inlet and double-outlet channels as a research object and studies heat dissipation performance at different ambient temperatures, coolant inflow, and charge-discharge rates of the battery. The results of the experiments indicate that with the increase in ambient temperature and charge-discharge rates, the temperature in the top of the cells increases more than in the bottom of cells, especially in the middle of the battery. Compared with coolant inflow, the charge-discharge rate of the battery is the main reason for the high temperature rise and difference. When the charge-discharge rate increases, the coolant inflow of the liquid cooling system should be strengthened a lot to balance the increased heat power of the battery itself. Then, the design reference of the battery liquid cooling system is offered. Published by AIP Publishing.