Abstract: In order to control the service temperature of energy storage battery pack in an ideal range, a multi-channel serpentine liquid cooling plate is selected as the liquid cooling system of battery pack, and the influence of the number of channels of liquid cooling plate on cooling efficiency is analyzed. Six design schemes with the number of flow channels of 3, 4, 5, 6, 7 and 8 were adopted. It was found that the number of flow channels of liquid-cooled plates had no obvious influence on the heat transfer performance. All liquid-cooled plates could keep the maximum temperature of the battery pack below 39 ℃, with the average temperature of 34.3 ℃, and the temperature difference between cells was around 2.1 ℃, so that the battery pack was in the normal working temperature range, and the flow resistance of liquid-cooled plates would decrease with the increase of the number of flow channels. By comprehensively comparing the flow resistance and processing difficulty of liquid cooling plate, the five-channel liquid cooling plate is selected for parameter optimization, and the flow resistance can be reduced from 1 101 Pa to 640.6 Pa without affecting its cooling performance, thus reducing the energy consumption of liquid cooling system and improving efficiency.

Key words: energy storage battery, battery thermal management, response surface optimization, flow resistance, serpentine liquid cooling plate