混合电动汽车电池管理系统设计

Design of battery management system for hybrid electrical cars

目前已存在的电池管理系统相对薄弱,对电池实时工作状态和一些故障很难监控。设计了适用混合电动汽车上动态均衡式的电池管理系统(BMS)。硬件系统采用MC9S12XEP100微控制器(MCU),通过分析电池管理系统的原理和特点,分别进行了上、下位机软件的设计,实现了安时法和Kalman两种剩余电量SOC算法的交互应用,优化了SOC估算,满足了系统估算5%以内的误差要求,实验最终结果误差为3.3%。同时解决了系统硬件掉电问题,实现上位机直接对数据的显示。测试实验表明系统达到了预期的目标。

The existed battery management system is relatively weak in the battery real-time monitoring.The real work of the battery status,fault is difficult to monitor.This paper presents a battery management system（BMS） for hy-brid／electrical cars based on MC9S12XEP100,including hardware architecture and software development,and also analyses the principles and characteristics of battery management system.The upper computer and lower MCU soft-ware were designed,with the realization of SOC Algorithm by applications of AH metering and Kalman Filtering.Op-timizing SOC calculate.Meeting the requirements of the calculation error of SOC 5%,and the end result error was 3.3%.The problem of data loss due to hardware power-down was resolved by designing calculations,with implement-ing the storage of data on computer.The results of simulation and tests show that the development of this system meets the design objectives.