Analysis of performance degradation and residual life prediction of batteries for electric vehicles under driving conditions

作者：Li, Wenhua^*; Jiao, Zhipeng; Zhou, Lulu

来源：IEEJ Transactions on Electrical and Electronic Engineering, 2019, 14(3): 493-498.

DOI：10.1002/tee.22831

• electric vehicle (EV)
• lithium battery
• performance degradation
• wiener process
• life prediction

The analysis of residual life prediction of batteries for electric vehicles under driving conditions was performed based on the degradation data. This article, characteristics of lithium iron phosphate battery performance degradation as the object, mainly considers two factors about the charge-discharge rate and vibration stress, first, the lithium battery performance degradation test simulating a car in a real driving environment is designed, which provides the lithium battery performance test reference. Then, the model parameters were obtained based on the test data. Finally, the performance degradation model and residual life prediction model of the lithium battery based on the Wiener process are established. This method not only has a high prediction accuracy, but also avoids the construction of a complex battery mechanism degradation model. What is more, this article provides a good perspective for residual life prediction in simplified experiments saving cost.

• 出版日期2019-3
• 单位河北工业大学