Experimental study on battery thermal management based on liquid cooling channel optimization
Efficient thermal management is crucial for the safety and temperature uniformity of lithium batteries at high temperature.A new type of liquid cooled battery thermal management system using Y-channel liquid cooled plates was proposed.The effects of coupling parameters such as coolant inlet flow rate,channel width,and inlet temperature on the maximum temperature,maximum temperature difference,and coolant inlet and outlet pressure drop of the battery were studied using experimental and simulation methods.The results show that compared with the system without cooling device,the cooling performance of the Y-channel cooling plate is improved by 27.5％.At a 3C discharge rate,the maximum surface temperature of the battery can be controlled within 39.8℃.The smaller the inlet flow rate,the lower the temperature uniformity of the battery.When the flow rate is 0.1 m/s,theEIindex increases by 16％.The design of channel width requires a balance between cooling performance and power consumption.A channel with a width of 1.5 mm has the best overall performance,with a maximum EI index increase of 8.3％compared to other widths.When the highest temperature is within the optimal temperature range,the inlet temperature is 20 ℃,and the EI index reaches the highest value of 1.24,taking into account both temperature equalization performance and power consumption.The proposed Y-shaped channel liquid cooling plate can provide a certain reference for the thermal design of battery liquid cooling systems.
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