面向锂离子动力电池的广义热弹性效应模型和热安全性评估的脆性分层理论研究

With the fog and haze events continue to occur, one clean way to travel constantly attracted attention .e.g. the electric vehicles. But the energy density and the safety of the power battery in China is still the biggest bottleneck in the development of this industry. However the security of the power battery is especially great gap with foreign advanced level. With the battery electrolyte leakage may occur gas release, smoke and other phenomena, if the event that thermal runaway is completely unable to control, there will be serious when the phenomenon of combustion and explosion, endangering the safety of the use of personnel. This project with the cooperation of the enterprises in the development of electric vehicle as the research object, using theoretical modeling and experimental optimization as the main line, in order to improve the calculation accuracy of thermal effect and power battery system collapse prediction accuracy level as the goal. Battery generalized thermodynamic model for entry point to the hierarchical structure of the battery brittle theoretical models as a means to break down, the thermal stability of the system battery research principles, especially in overcharge, thermal properties under conditions of abuse over discharge and short circuit, proposed a set of vehicle power protection Battery safety modeling technology to improve battery safety, to promote electric vehicles as quickly as possible into the large-scale industrialization has very important significance.

随着严重雾霾事件不断发生，电动汽车这种清洁出行方式不断引起人们的重视。但目前动力电池的能量密度和安全性仍是我国发展该产业的最大的瓶颈。其中动力电池的安全性尤其与国外先进水平存在较大差距。伴随着动力电池可能出现的电解液泄露、气体放出、冒烟等现象，如果热失控现象一旦发生就完全无法控制，严重的时候还会出现燃烧和爆炸现象，危及使用人员的人身安全。本项目以合作企业在研电动车为研究对象，以理论建模和实验优化为主线，以提高热效应计算精度和动力电池系统崩溃预测准确性水平为目标，以动力电池广义热弹性动力学模型建立为切入点，以电池脆性理论分层模型的结构化分解为手段，系统研究动力电池热稳定性原理，特别是在过充、过放和短路等滥用条件下的热特性，提出一套保障车载动力电池安全的建模技术，提高动力电池的安全性，对推动电动汽车尽快进入大规模的产业化具有非常重要的意义。

目前动力电池的能量密度和安全性仍是我国发展该产业的最大的瓶颈。其中动力电池的安全性尤其与国外先进水平存在较大差距。伴随着动力电池可能出现的电解液泄露、气体放出、冒烟等现象，如果热失控现象一旦发生就完全无法控制，严重的时候还会出现燃烧和爆炸现象，危及使用人员的人身安全。本项目以合作企业在研电动车为研究对象，以理论建模和实验优化为主线，以提高热效应计算精度和动力电池系统崩溃预测准确性水平为目标，以动力电池广义热弹性动力学模型建立为切入点，以电池脆性理论分层模型的结构化分解为手段，系统研究动力电池热稳定性原理，特别是在过充、过放和短路等滥用条件下的热特性，提出一套保障车载动力电池安全的建模技术，提高动力电池的安全性，对推动电动汽车尽快进入大规模的产业化具有非常重要的意义。