基于电池SOC保持的混联式混合动力车辆能量管理策略的研究

摘要

针对混联式混合动力重型车辆的大驱动功率需求,研究了基于电池SOC保持的能量管理策略.该策略根据保持电池SOC在较高水平的要求进行能量管理与分配,使电池具有较高的功率与能量裕度,从而使电动机可以较大的功率和较长的时间在急加速等大驱动功率需求工况对发动机进行助力,实现重型车辆较高的动力性指标.在此基础上设计了综合控制器并编写了程序代码,采用基于dSPACE的硬件在环仿真系统进行了仿真.结果表明该控制策略在满足燃油经济性和车辆驱动等基本要求的前提下,实现了混联式混合动力车辆能量管理功能与预期的电池SOC保持的目标.%Aiming at the high drive power demand of heavy parallel-serial hybrid electric vehicle ( PSHEV), an energy management strategy based on battery state of charge (SOC) maintaining is studied. With the strategy, energy management and distribution are conducted according to the requirement of maintaining battery SOC at a relatively high level for the battery having higher power and energy margin to enable electric motor to assist the engine with higher power in longer time at a working condition demanding high drive power such as hard acceleration, achieving higher power performance indicator of heavy vehicles. On these bases the ECU is designed with a corresponding program code written, and a simulation is performed with a dSPACE-based hardware-in-the-loop simulation system. The results indicate that the control algorithm can realize the energy management function and the expected battery SOC keeping target of PSHEV while meeting the basic requirements, including fuel economy and vehicle drive.