运输类新能源车辆的快速发展是国家“十三五”期间的重点发展规划。运输车用动力系统要求锂离子电池大型化、成组化。因其大容量和高功率的需求而带来的电池系统热问题将严重影响整车的系统控制、循环寿命和安全性能。因此，在整车实际运行环境下，锂离子动力电池的电池特性和热管理策略对电池管理系统乃至整车管理系统有至关重要的影响。本项目拟从基本物理场出发建立锂离子动力电池电场模型和统一描述多场耦合的动力电池热特性模型；在有限散热空间内，为使得电池在适宜的温度范围内工作，采用微通道流体液冷散热，建立模型并进行实验验证；开展电池动态工况性能试验，构建基于有效实际工况的运输类专用车动力电池系统，以提高电池热管理系统的精细化、智能化管理程度，延长电池的使用寿命。本项目研究方法和理论成果，可为延长运输类新能源车续航里程和使用寿命提供技术支持。

The rapid development of new energy transport vehicles is a major blueprint of “13th Five-Year Plan”. Transport vehicle power system requires large capacity, high-level power, large-scale and grouping of lithium-ion batteries. These requirements bring serious heat management problems to power battery system, which will seriously affect the system control, cycle life and safety performance of the vehicle. Therefore, it is necessary to study the battery characteristics and thermal management strategy of lithium-ion power battery under the actual vehicle operating environment. Firstly, based on basic physical field, this project will establish the electric field model of lithium-ion batteries and the unified description of the thermal characteristics model of multi-field coupling power batteries. Secondly, in order to satisfy the batteries work at the appropriate temperature at the very limited heat dissipation space, microchannel fluids will be used for liquid cooling heat dissipation, and the corresponding heat dissipation models will be established and verified by experiments. Last but not least, lithium-ion batteries dynamic working condition performance test will be conducted to build a transport vehicles battery system based on actual working conditions, which can improve the refinement and intelligent management of battery thermal management system as well as prolong the service life of batteries. The research methods and theoretical achievements of this project can provide technical support for extending the endurance mileage and service life of new energy transport vehicles.