锂离子动力电池低温加热策略研究进展

Research Progress of Low-Temperature Heating Strategies for Lithium-Ion Power Batteries

随着新能源产业飞速发展,纯电动汽车的市场渗透率迅速上升。而制约电动汽车使用的一大关键因素,就是环境温度。在低温下,动力电池的功率特性衰减、电池内阻增大、电池可用容量降低。这些负面因素将直接影响电动汽车的续航里程与安全性。基于动力电池低温加热策略的主要产热区域,将目前锂离子电池低温加热策略划分为电池内部加热策略和电池外部加热策略两个大类。分别对这两个大类进行更详细的梳理,对目前的锂离子电池低温加热策略进行了系统的研究。分析了各种加热策略的优点与弊端,并针对存在的问题提出了解决意见。可为后续电动汽车动力电池低温加热策略的研究、锂离子电池低温下热管理系统的设计提供参考。

With the rapid development of the new energy industry,the market penetration rate of blade electric vehicles(BEVs)is rising rapidly.A key factor that restricts the use of BEVs is the ambient temperature.At low temperatures,the power characteristics of lithium-ion batteries(LiBs)deteriorate,the internal resistance of LiBs increases,and the available capacity of LiBs decreases.These negative impacts will directly affect the cruising range and safety of BEVs.Based on the main heat-generation regions,the low-temperature heating strategies were divided into two categories:internal heating and external heating.The two categories were also sorted out in more detail separately,and the current low-temperature heating strategies for Li Bs were systematically studied.The advantages and disadvantages of various heating strategies were analyzed,and solutions to the existing problems were proposed.It may provide a reference for the follow-up research on low-temperature heating strategies and the design of battery thermal management systems.