Model-based Multi-scale Thermal Safety Design of Traction Battery Systems

Abstract

Abstract: Aiming at the thermal safety problems of lithium-ion traction battery systems， from the viewpoints of battery material modification， battery cell design and battery system design， a model-based thermal safety design and development method for battery systems was proposed. The test methods of thermal stability of battery materials， thermal runaway characteristics of battery cells and thermal runaway propagation of battery systems were summarized. Based on the measured parameters of battery thermal safety characteristics， the model of chemical reaction kinetics for thermal runaway of batteries， the model for predicting temperature and pressure of thermal runaway of cells， and the model for thermal runaway propagation of battery packs were set up. The factors needed to be considered in these models were listed. Using the model for simulation analysis， the main factors affecting the thermal safety of the battery systems were obtained and the design of multi-scale thermal safety was guided.

Key words: traction battery system, thermal safety testing and modeling, multi-scale, design and development mode

摘要：

针对锂离子动力电池系统的热安全问题，从电池材料、电池单体、电池系统三个尺度，提出了基于模型的电池系统热安全设计开发总体思路。总结了电池材料热稳定性、电池单体热失控特性、电池系统热失控蔓延特性等的测试表征方法。探讨了建立电池热失控的化学反应动力学模型、单体热失控温度与压力预测模型、电池模组热失控蔓延模型过程中需要考虑的因素。利用模型进行仿真分析，可以得到影响电池系统热安全性的主要因素，并指导多尺度热安全设计。

关键词: 动力电池系统, 热安全测试与建模, 多尺度, 设计开发模式

CLC Number:

U464.9

CHEN Tianyu, FENG Xuning, OUYANG Minggao, LU Languang. Model-based Multi-scale Thermal Safety Design of Traction Battery Systems[J]. China Mechanical Engineering.

陈天雨, 冯旭宁, 欧阳明高, 卢兰光. [动力电池]基于模型的动力电池系统多尺度热安全设计[J]. 中国机械工程.

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