Abstract
Direct drop contact and immersion contact liquid cooling technology have proven to be effective in heat transfer and temperature control for lithium-ion batteries. In this study, a novel drop contact cooling system with a multi-hole outlet pipe was proposed to enhance the uniformity of coolant outflow in the reservoir based on an analysis of the contact cooling system for lithium-ion battery modules. The heat dissipation performances between the drop contact cooling system (DCCS) and immersion contact cooling system (ICCS) were compared through numerical simulations and experiments. The numerical results demonstrate the DCCS can achieve lower maximum temperature and temperature differences in the lithium-ion battery module. The experiment tests were conducted at a total flow rate of 560 mL/min to compare the performance of the battery module between DCCS and ICCS. The results show that the maximum temperature of the battery module with DCCS was approximately 3.9 °C lower than that with ICCS with the temperature difference of 4 °C. It can be inferred that DCCS of lithium-ion battery modules under the same conditions can lead to superior heat dissipation effects compared with ICCS.
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