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2014中国汽车工程学会年会

作者： Yu Lina Wang Dan Zhao Zhongling Han Jian Zhang Kejin Cui Xinran Xu Zhou China FAW Co. Ltd.R&D Center

ISBN: (纸本)9783662450420

To investigate the impact of the pore-forming agent on the performance of polymer membranes,four AlO/PVDF-HFP separators with different pore-forming agents,n-butanol,deionized water,ethanol and isopropanol are prepared by adding AlO as the filler.The wettability,morphology,mechanism strength,and electrochemical properties of above membranes are characterized.Results show that the membrane prepared with n-butanol as the pore-forming agent has the best property,with electrolyte uptake rate of 420%,ion transference number of 0.90,tensile strength of 14.93 MPa,conductivity of 0.50mS/cm,electrochemical stability of 5.2V,and discharging specific capacity of 108mAh/g at 4C with a LiFePO hall-cell.

关键词： lithium-ion power battery pore-forming technology separators

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Challenges and recent progress in thermal management with heat pipes for lithium-ion power batteries in electric vehicles

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Science China(Technological Sciences) 2021年第5期64卷 919-956页

作者： HUANG Yao TANG Yong YUAN Wei FANG GuoYun YANG Yang ZHANG XiaoQing WU YaoPeng YUAN YuHang WANG Chun LI JinGuang School of Mechanical&Automotive Engineering South China University of TechnologyGuangzhou 510640China

Electric vehicles(EVs)are globally undergoing rapid developments,and have great potentials to replace the traditional vehicles based on fossil fuels.power-type lithium-ion batteries(LIBs)have been widely used for EVs,owing to high power densities,good charge/discharge stability,and long cycle life.The driving ranges and acceleration performances are gaining increasing concerns from customers,which depend highly on the power level of LIBs.With the increase in power outputs,rising heat generation significantly affects the battery performances,and in particular operation safety.Meanwhile,the cold-start performance is still an intractable problem under extreme conditions.These challenges put forward higher requirements for a dedicated battery thermal management system(BTMS).Compared to traditional BTMSs in EVs,the heat pipe-based BTMS has great application prospects owing to its compact structure,flexibility,low cost,and especially high thermal conductivity.Encompassing this topic,this review first introduces heat generation phenomena and temperature characteristics of LIBs.Multiple abuse conditions and thermal runaway issues are described afterward.Typical cooling and preheating methods for designing a BTMS are also discussed.More emphasis on this review is put on the use of various heat pipes for BTMSs to enhance the thermal performances of LIBs.For lack of wide application in actual EVs,more efforts should be made to extend the use of heat pipes for constructing an energy-efficient,cost-effective,and reliable BTMS to improve the performances and safety of EVs.

关键词： lithium-ion power battery heat pipe battery thermal management system thermal performance thermal design thermal runaway

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