In the charging and discharging process of new energy vehicles, how to maintain power battery within optimum operating temperature range, reduce the peak temperature and temperature difference, which is a problem needs to be paid attention to. Proper cooling technology can reduce the negative influence of temperature on battery pack, effectively improve power battery efficiency, improve the safety in use, reduce the aging rate, and extend its service life. In this context, several battery thermal management systems(BTMS) are reviewed, including air cooling BTMS, liquid cooling BTMS and refrigerant direct cooling BTMS in traditional battery thermal management system; phase change material-based BTMS, heat pipe-based BTMS and thermoelectric element-based BTMS in new battery thermal management system. In order to reduce negative influence of excessive temperature on the battery pack, and to seek feasible solutions for BTMS in future development, the above six power battery cooling technologies are discussed. Summarize the research emphases and research progress of different BTMS at present. Objectively evaluate the advantages and disadvantages of each BTMS. Considering actual working conditions, the installation feasibility, as well as economic benefits of each BTMS, then discuss proper solutions, and predict future development trends reasonably. Finally, analyze and discuss the differences and gaps between traditional and new BTMS. Providing a reference for designing the best BYMS solution. Ensuring the battery is in the optimum operating temperature range, maintain the BTMS stable operation, and improve battery conversion efficiency, providing valuable solutions for the BTMS research in the future.

在新能源汽车的充放电过程中，如何将动力电池维持在最佳工作温度范围内，减小峰值温度和温差，这是一个需要注意的问题。适当的冷却技术可以减少温度对电池组的负面影响，有效提高动力电池的效率，提高使用安全性，降低老化率，并延长其使用寿命。在此背景下，对几种电池热管理系统（BTMS）进行了回顾，包括传统电池热管理系统中的空气冷却BTMS，液体冷却BTMS和制冷剂直接冷却BTMS。新电池热管理系统中的基于相变材料的BTMS，基于热管的BTMS和基于热电元件的BTMS。为了减少温度过高对电池组的负面影响，并为未来的BTMS寻找可行的解决方案，本文对以上六种动力电池冷却技术进行了讨论。总结了目前各种BTMS的研究重点和研究进展。客观地评估每个BTMS的优缺点。考虑实际工作条件，每个BTMS的安装可行性以及经济效益，然后讨论适当的解决方案，并合理地预测未来的发展趋势。最后，分析和讨论传统和新型BTMS之间的差异和差距。为设计最佳BYMS解决方案提供参考。确保电池处于最佳工作温度范围内，保持BTMS稳定运行，并提高电池转换效率，