Experimental investigation of lithium-ion power battery liquid cooling

doi:10.7523/j.issn.2095-6134.2018.02.016

Abstract

Abstract: A battery liquid cooling system which uses new electronic cooling fluid NOVEC 7000 as the working medium was proposed and some experimental investigation was carried out. The results showed that this system had excellent cooling effect. Temperature variation showed different regularities when the battery was discharged at different rates due to the different heat generation mechanisms. The effect of temperature on battery was bidirectional. Although the battery thermal management system effectively decreased the battery temperature and improved the thermal safety, the electrochemical performance declined as well. The maximum temperature of battery surface was effectively reduced with the increase in mass flow rate, but parasitic power resulting from the increase in mass flow rate, such as pump power consumption, should be considered. During cyclic charging/discharging, because of the boiling phenomenon, the maximum temperature of battery surface could be stably maintained between 34℃ and 36℃ when NOVEC 7000 was used as working medium.However, the temperature kept rising tendency while glycol was used as cooling medium. So, designing a battery thermal management system, based on flow boiling in mini/micro-channel, will effectively improve the thermal safety of batteries as well as the economy.

Key words: lithium-ion power battery, thermal management, liquid cooling, maximum temperature

CLC Number:

TK124

AN Zhoujian, JIA Li, YANG Chengliang, DANG Chao, XU Mingchen. Experimental investigation of lithium-ion power battery liquid cooling[J]. , 2018, 35(2): 254-260.

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