Research progress and challenges of new thermal disasters of lithium-ion batteries under liquid immersion conditions
In the context of"peak carbon dioxide emissions and carbon neutrality",immersion liquid cooling technology is one of the lithium-ion battery thermal management technologies with good application prospects.In the new generation of thermal man-agement systems,the thermal runaway-induced fire of lithium-ion batteries is still a major safety hazard.This paper provides a comprehensive overview of current research advances in immer-sion liquid-cooling technology,and multiple modes of thermal damage in lithium-ion batteries under immersion conditions are analyzed,and the research trend of thermal damage in new lithium-ion batteries is proposed.Firstly,immersion liquid cool-ing technology,its advantages and disadvantages,liquid cooling methods and liquid cooling medium are introduced,focusing on phase change liquid cooling technology and the physical param-eters of some commonly used liquid cooling agents.Secondly,the progress and policies of immersion liquid cooling technology in recent years are sorted out.Thirdly,from the immersion condi-tions of lithium-ion battery aging,thermal runaway and second-ary disasters and other aspects,the new lithium-ion battery ther-mal disaster mode is in-depth analyzed and discussed,pointing out the existing research deficiencies.And finally put forward in the future immersion liquid-cooling conditions,the new lithium-ion battery safety and protection technology research development direction.The research of this thesis will help to improve the ther-mal safety of lithium-ion battery packs under immersion condi-tions and enhance the post-disaster emergency response capability after thermal disasters.
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