首页|Electric-controlled pressure relief valve for enhanced safety in liquid-cooled lithium-ion battery packs
Electric-controlled pressure relief valve for enhanced safety in liquid-cooled lithium-ion battery packs
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The liquid-cooled battery energy storage system(LCBESS)has gained significant attention due to its supe-rior thermal management capacity.However,liquid-cooled battery pack(LCBP)usually has a high sealing level above IP65,which can trap flammable and explosive gases from battery thermal runaway and cause explosions.This poses serious safety risks and challenges for LCBESS.In this study,we tested overcharged battery inside a commercial LCBP and found that the conventionally mechanical pressure relief valve(PRV)on the LCBP had a delayed response and low-pressure relief efficiency.A realistic 20-foot model of an energy storage cabin was constructed using the Flacs finite element simulation software.Comparative studies were conducted to evaluate the pressure relief efficiency and the influence on neigh-boring battery packs in case of internal explosions,considering different sizes and installation positions of the PRV.Here,a newly developed electric-controlled PRV integrated with battery fault detection is introduced,capable of starting within 50 ms of the battery safety valve opening.Furthermore,the PRV was integrated with the battery management system and changed the battery charging and discharging strategy after the PRV was opened.Experimental tests confirmed the efficacy of this method in prevent-ing explosions.This paper addresses the safety concerns associated with LCBPs and proposes an effective solution for explosion relief.
Yuhang Song、Jidong Hou、Nawei Lyu、Xinyuan Luo、Jingxuan Ma、Shuwen Chen、Peihao Wu、Xin Jiang、Yang Jin
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Research Center of Grid Energy Storage and Battery Application,School of Electrical and Information Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China
Science and Technology Program of State Grid Corporation of China
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