Week-level early warning strategy for thermal runaway risk based on real-scenario operating data of electric vehicles

IF 15 1区工程技术 Q1 ENERGY & FUELS

Etransportation Pub Date : 2024-01-01 DOI:10.1016/j.etran.2023.100308

Aihua Tang , Zikang Wu , Tingting Xu , Xinyu Wu , Yuanzhi Hu , Quanqing Yu

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引用次数: 0

Abstract

Effective detecting thermal runaway risk in batteries are crucial for the rapid development and widespread adoption of electric vehicles. In this study, a strategy based on signal analysis is developed to realize the early warning of battery thermal runaway risk at the weekly level, without being limited by battery material systems. Firstly, a longitudinal outlier average method is developed to quantify the potential risk of thermal runaway in batteries and compared with a preset threshold to identify cells with performance anomalies. Secondly, an alarm assessment mechanism is developed, which integrates ongoing and historical operating data of suspicious cells across multiple decision layers. By employing an improved information entropy weighting method, this mechanism provides a comprehensive assessment of battery pack consistency, addressing issues related to false alarms and sporadic alerts. Finally, the effectiveness of this strategy is validated through actual vehicles involved in thermal runaway.

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基于电动汽车真实场景运行数据的热失控风险周级预警策略

有效检测电池热失控风险对于电动汽车的快速发展和广泛应用至关重要。本研究开发了一种基于信号分析的策略，在不受电池材料系统限制的情况下，实现了周级电池热失控风险预警。首先，开发了一种纵向离群值平均法来量化电池热失控的潜在风险，并与预设阈值进行比较，以识别性能异常的电池。其次，开发了一种警报评估机制，该机制整合了多个决策层中可疑电池的当前和历史运行数据。通过采用改进的信息熵加权方法，该机制可对电池组的一致性进行全面评估，解决与误报和零星警报相关的问题。最后，通过涉及热失控的实际车辆验证了这一策略的有效性。

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来源期刊

Etransportation Engineering-Automotive Engineering

CiteScore

19.80

自引率

12.60%

发文量

审稿时长

39 days

期刊介绍： eTransportation is a scholarly journal that aims to advance knowledge in the field of electric transportation. It focuses on all modes of transportation that utilize electricity as their primary source of energy, including electric vehicles, trains, ships, and aircraft. The journal covers all stages of research, development, and testing of new technologies, systems, and devices related to electrical transportation. The journal welcomes the use of simulation and analysis tools at the system, transport, or device level. Its primary emphasis is on the study of the electrical and electronic aspects of transportation systems. However, it also considers research on mechanical parts or subsystems of vehicles if there is a clear interaction with electrical or electronic equipment. Please note that this journal excludes other aspects such as sociological, political, regulatory, or environmental factors from its scope.