第 34卷第 1期 2017年 1月 广东工业大学学报 Journal of Guangdong University of Technology Vol. 34 No. 1 January 2017 doi: 10.12052/gdutxb.160057 18650圆柱形电芯的产热行为研究 王子缘，张国庆，高冠勇，吕又付 （广东工业大学材料与能源学院，广东广州 510006） 摘要:随着新能源汽车的不断发展,提高动力电池运行时的热安全性倍受关注.通过实验方法测试出18650单体电芯在 恒流1 C放电倍率下的电压、电流、温度及时间数据,通过能量守恒估算电芯的理论产热值为3 901.51 J,并且计算出电 芯的平均比热容与平均发热功率分别为5.37 J/(g·K)与1.08 W.同时采用计算机仿真的方式，模拟出18650电池在1 C恒 流放电时的表面/截面温度云图,与实验得出的数据对比并进行验证，实现其最高温度的误差值小于等于1℃,为后续 的电动汽车热灾害评估打下理论基础. 关键词:电芯产热；热安全；能量守恒 中图分类号: TK112 文献标志码: A 文章编号: 1007–7162(2017)01–0045–05 A Study of Heat Generation Behavior of 18650 Cylindrical Battery Wang Zi-yuan, Zhang Guo-qing, Gao Guan-yong, Lyu You-fu (School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China) Abstract: With the continuous development of new energy vehicles, increasing the thermal safety of the power battery attracts more attention. The data of current, voltage, temperature and time of the 18650 single cell are tested under the constant current 1 C discharge rate, the theoretical calorific value of the cell estimated to be 3 901.51 J based on law of conservation of energy, and the average specific heat and the average heating power is calculated through experimental method to be respectively 5.37 J/(g·K) and 1.08 W. At the same time, the surface/section temperature image of the 18650 single cell through 1 C constant current discharge is simulated by the way of computer simulation. Compared with the experimental data and verified, the error of the maximum temperature is less than or equal to 1℃, which lays a theoretical foundatio