期刊
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
卷 45, 期 5, 页码 7326-7340出版社
WILEY
DOI: 10.1002/er.6315
关键词
electric vehicle; equalization electric quantity; internal short circuit; Lithium‐ ion batteries; thermal runaway
资金
- National Natural Science Foundation of China [51877138, 51977131]
- Natural Science Foundation of Shanghai [19ZR1435800]
- Shanghai Science and Technology Development Foundation [19QA1406200]
- State Key Laboratory of Automotive Safety and Energy [KF2020]
This study proposes an online ISC detection method considering equalization electric quantity (EEQ) to overcome issues in ISC detection, and an ISC routing inspection approach is suggested to improve the timeliness of ISC detection.
The timely and accurate detection of an internal short circuit (ISC) is critical for improving electric vehicle (EV) safety. Typical ISC detection approaches are based on consistency differences between each cell in a module. However, the indispensable equalizer in a battery management system reduces inconsistency, affecting the accuracy and timeliness of ISC detection. Hence, an online ISC detection method considering equalization electric quantity (EEQ) is proposed. First, the remaining charge capacity and state-of-charge difference approaches are investigated. Next, the negative impact of EEQ on ISC detection is analyzed; thereafter, improved approaches based on EEQ compensation are proposed. Moreover, an ISC routing inspection approach for dormant EVs is proposed. Lastly, the proposed approaches are verified. The main results are as follow: (a) The ISC detection method without EEQ compensation has issues, such as significant errors, undetected ISC, and longer detection periods; our approaches help effectively overcome these issues, while the detection error is maintained below 5%; (b) Supplementing the above approaches, the proposed ISC routing inspection approach can help detect a moderate ISC even for a dormant EV, while further improving timeliness in ISC detection.
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