Experimental investigation on immersion liquid cooled battery thermal management system with phase change epoxy sealant

To improve the working performance of the lithium-ion battery in continuous operation under water conditions, a novel immersion liquid cooled battery thermal management system (BTMS) with epoxy sealant based composite phase change (ESPE) is designed for lithium-ion batteries. Considering the traditional liquid cooling systems with complex auxiliary equipment, the battery module with ESPE exhibits an excellent cooling effectiveness and displays long-term corrosion resistance performance. The thermal performances of epoxy sealant with or without the addition of paraffin, expanded graphite are compared, respectively. The experimental results indicate that ESPE exhibits excellent waterproof and thermal management performance. Even during 3C charge and discharge cycle, the maximum temperature and the maximum temperature difference can be maintained at 42 °C and 2 °C, respectively. With these prominent performances, the designed BTMS with respect to excellent waterproof and prominent thermal management performances can significantly reduce the unnecessary power consumption of liquid cooling and provide insights into the passive BTMS.