With the widespread popularity of new energy vehicles, the safety of its core power source, lithium-ion batteries (LIBs), has increasing attention. However, most of its vehicle safety problems are caused by mechanical failure, but its dynamic failure mechanism is still not clear. Firstly, based on the experiment, a battery computational model for analyzing the mechanical response of the battery is established. Secondly, on the basis of this, the battery dynamic response analysis under the different conditions is carried out, and the factors such as the end cap and the state of charge (SOC) correlation of the battery are considered respectively, and the failure behavior under high-speed load is analyzed in detail. Finally, the model is validated according to the experimental results, and the parameter research is further carried out to predict the failure behavior of the battery under dynamic load. The related results can provide a reference for the safety design of the battery under the mechanical integrity framework.

随着新能源汽车的广泛普及，其核心电源锂离子电池（LIB）的安全性日益受到关注。但是，其大多数车辆安全问题是由机械故障引起的，但其动态故障机制仍不清楚。首先，基于实验，建立了用于分析电池机械响应的电池计算模型。其次，在此基础上，进行了不同条件下的电池动态响应分析，分别考虑了电池的端盖和充电状态（SOC）相关性等因素，以及详细分析高速负载。最后，根据实验结果对模型进行了验证，并进行了参数研究，以预测电池在动态负载下的失效行为。相关结果可为机械完整性框架下电池的安全设计提供参考。