锂离子动力电池组发热功率试验研究

Experiment Research on the Heating Power of Lithium-ion Battery Module

锂离子动力电池的性能和寿命与电池热管理密切相关,而电池产热模型的建立是其热管理的基础。通过理论计算、试验测试和模拟分析对额定容量为50 A·h、额定电压为3.65 V的三元锂离子动力电池的充放电发热特性进行了研究。结果表明:Newman公式在电池发热功率计算中准确度较高,与试验测得发热功率相比误差为8.7%。将理论发热功率应用于模拟仿真后,模组最高温度与试验测得最高温度误差为9.5%,模拟结果可为锂电池的性能研究及热管理设计提供参考。

The performance and life of lithium-ion batteries are closely related to the thermal management.The establishment of battery heat production model is the basis of the thermal management.The thermoelectric performance of the 50 A·h and 3.65 V lithium-ion power battery was studied through theoretical calculation,experimental research and simulation analysis.The results show that Newman formula has a relatively high accuracy in calculating battery heat generation,with an error of 7.5% compared with experimental values.The error of module maximum temperature between simulation and experiment is 9.5% by applying the theoretical heating generation to simulation.The simulation results provide a reference for performance study and thermal management design of lithium battery.