高可靠性电池管理系统设计及IAP在线升级

Design of high reliability battery management system and IAP online upgrade

针对大功率储能系统需求,开发了一款由AVP32F335为核心处理芯片,MT9804为电池管理芯片的高可靠性电池管理系统,并基于此开发出上位机监控平台。系统与各设备采用独立的CAN总线进行信息交互,实现了多达120串单体电池包的电压和温度监测,可扩展性强。对系统各模块进行了可靠性设计:针对大电流、高电压以及强电磁干扰等恶劣环境,设置电气隔离,增加外围保护电路;对于系统各模块供电,设计了二次电源监控电路,实时跟踪其运行状态。对于BMS装盖密封不便于现场开箱下载更新程序,设计了基于CAN总线的IAP在线升级方法,并具有防升级失败功能,避免了由于突然掉电等因素导致系统无法重新运行的情况。结果表明,经过一系列冲击测试后,系统仍能稳定运行。系统实现了信息采集、故障报警与分析、数据存储与读取以及在线升级等功能,达到了预期的设计要求。

According to the requirements of high-power energy storage system,a highly reliable bat-tery management system with AVP32F335 as the core processing chip and MT9804 as the battery management chip was developed,and a monitoring platform for the upper computer was built based on this.The system used independent CAN bus to exchange information with each device,which real-izes the voltage and temperature monitoring of up to 120 strings of single battery packs and has strong scalability.The reliability design of each module of the system was carried out:according to the harsh environment such as high current,high voltage and strong electromagnetic interference,electrical isolation was set up and peripheral protection circuits were added;for the power supply of each module of the system,a secondary power supply monitoring circuit was designed to track its running state in real time.For BMS,it is not convenient to download the update program out of the box.An online upgrade method of IAP based on CAN bus was designed,which has the function of preventing upgrade failure and avoids the situation that the system can not run again due to sudden power failure and other factors.The results show that the system can still run stably after a series of impact tests.The system has realized the functions of information collection,fault alarm and analysis,data storage and reading,and online upgrade,and achieved the expected design requirements.