锂离子电池可逆与不可逆生热特性研究

以商用圆柱形18650电池为研究对象，利用Bernardi简化生热模型，综合考虑了电池单体在不同温度、不同荷电状态（SOC）下的实际生热情况，通过混合脉冲功率性能放电测试（HPPC）和开路电压测试，拟合得到电池单体生热、直流内阻与SOC、温度的函数关系。结果表明，电池单体的生热与温度、SOC有很大关联，建立的单体生热模型可为动力电池包热管理的模拟和优化提供参考。

Investigation on Reversible and Irreversible Heat Generation of Lithium-ion Battery

Temperature and state of charge(SOC) are two important factors for the heat generation oflithium-ion battery in electric vehicles. In this study, the heat generation of a commercial cylindrical lithiumion battery was studied by using the simplified Bernardi heat model. Considering the impact of temperature and SOC in heat generation, the reversible and irreversible heat curves were fitted by the hybrid pulse power characteristic(HPPC) test and open circuit voltage measurement. Results show that the internal resistance and heat generation have a strong correlation with temperature and SOC. The fitting formulas of heatgeneration provide a reference for the simulation and optimization of power battery thermal management.