Channel parameters for the temperature distribution of a battery thermal management system with liquid cooling

The channel count, channel aspect ratio and channel inlet layout are selected as variables to investigate and quantify the effect of structural parameters on the cooling ability of a liquid cooling system. The results show a tendency for the temperature of a single Li-ion battery to rapidly increase during the discharge process, and this tendency becomes relatively flat from 800 to 3200 s. The temperature of the domain close to the electrodes is higher than that of other parts, and the average temperature of the positive electrode is the highest. The channel count has an obvious effect on the maximum temperature and temperature difference of the Li-ion battery pack, but this effect is limited. Increasing the aspect ratio of the rectangular channel can reduce the maximum temperature and temperature difference of the Li-ion battery pack, thereby making the maximum temperature domain shift from the channel inlet side to the channel outlet side. However, excessively increasing the aspect ratio of the rectangular channel will increase the temperature difference. The maximum temperature curves of the Li-ion battery pack have a similar upward tendency when a different channel inlet layout is adopted for the liquid cooling system. However, the temperature uniformity can be significantly improved when an alternating arrangement in the channel inlet design is adopted.