1.长安大学能源与电气工程学院,710064,陕西西安
2.中国航空工业集团公司西安航空计算技术研究所,710076,陕西西安
3.嵌入式共性基础软件技术创新中心,710076,陕西西安
收稿:2026-05-07,
修回:2026-08-08,
录用:2026-10-13,
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李杰, 张少坤, 郭凌云, 等. 热滥用条件下锂离子电池的失效预警与温度预测[J/OL]. 西安交通大学学报,2026-10-13. http://zkxb.xjtu.edu.cn/zh/article/173927200/.
LI Jie, ZHANG Shaokun, GUO lingyun, et al. Failure Early Warning and Temperature Prediction of Lithium-Ion Batteries under Thermal Abuse Conditions[J/OL]. JOURNAL OF XI’AN JIAOTONG UNIVERSITY,2026-10-13. http://zkxb.xjtu.edu.cn/zh/article/173927200/.
李杰, 张少坤, 郭凌云, 等. 热滥用条件下锂离子电池的失效预警与温度预测[J/OL]. 西安交通大学学报,2026-10-13. http://zkxb.xjtu.edu.cn/zh/article/173927200/. DOI:
LI Jie, ZHANG Shaokun, GUO lingyun, et al. Failure Early Warning and Temperature Prediction of Lithium-Ion Batteries under Thermal Abuse Conditions[J/OL]. JOURNAL OF XI’AN JIAOTONG UNIVERSITY,2026-10-13. http://zkxb.xjtu.edu.cn/zh/article/173927200/. DOI:
针对热滥用条件下18650锂离子电池温升速率快、失效阶段难以提前识别以及单一温度或电压信号预测稳定性不足的问题,本文通过实际热滥用实验获得了不同SOC (State of Charge) 和加热功率作用下电池电压衰减、温度上升及失效时间的演化规律,揭示了SOC升高和外部热激励增强会导致失效提前、温升速率加快及热安全风险增加的特征。在此基础上,进一步考虑电压-温度耦合响应与时间序列变化特征,构建SVM-Res2Net-Transformer联合模型,实现热滥用过程中的失效预警与温度多步预测。首先,搭建单体电池热滥用实验平台,获取不同加热功率和荷电状态下的电压-温度数据;其次,基于COMSOL Multiphysics建立电-热耦合集总参数模型,并采用未参与参数标定的SOC和加热功率工况验证模型精度。在此基础上,构建SVM-Res2Net-Transformer联合模型,实现基于电压窗口特征的失效风险识别和温度多步预测。结果表明,SVM能够有效区分正常状态与失效风险状态;Res2Net-Transformer在多数组合工况下预测R
2
高于0.98,100% SOC工况下R
2
为0.965。与五种对比模型相比,所提模型综合性能最优,R
2
、RMSE和MAPE分别为0.998、4.401和0.016。研究结果可为锂离子电池热安全风险识别与预警提供参考。
To address the rapid temperature rise of 18650 lithium-ion batteries under thermal abuse
the difficulty of early identification of failure stages
and the insufficient prediction stability when relying on a single temperature or voltage signal
this study conducts thermal abuse experiments to obtain the evolution patterns of battery voltage decay
temperature rise
and failure time under different SOC (State of Charge) and heating powers. The results reveal that increased SOC and enhanced external thermal excitation lead to earlier failure
faster temperature rise
and higher thermal safety risks. On this basis
considering the coupled voltage-temperature response and time-series variation characteristics
an SVM-Res2Net-Transformer hybrid model is developed to realize failure warning and multi-step temperature prediction during thermal abuse. First
a single-cell th
ermal abuse experimental platform is built to collect voltage-temperature data under different heating powers and states of charge.Secondly
an electro-thermal coupled lumped-parameter model was developed in COMSOL Multiphysics
and its accuracy was validated using uncalibrated SOC and heating power operating conditions.Based on this
the SVM-Res2Net-Transformer hybrid model is constructed to identify failure risks using voltage-window features and to perform multi-step temperature prediction. The results show that SVM can effectively distinguish between normal states and failure-risk states. The Res2Net-Transformer achieves prediction R
2
values above 0.98 under most combined operating conditions
with an R
2
of 0.975 under 100% SOC. Compared with five benchmark models
the proposed model demonstrates the best overall performance
with R
2
RMSE
and MAPE values of 0.998
4.401
and 0.016
respectively. The findings provide a reference for thermal safety risk identification and early warning of lithium-ion batteries.
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