基于物联网的锂离子电池组能量均衡系统设计与实现

Design and Implementation of Lithium-ion Battery Management System Based onInternet of Things

针对锂离子电池组因单体电池间参数差异,长期使用导致的不一致性将造成过充或过放等问题,提出一种基于物联网的锂离子电池组能量均衡系统。该系统通过建立双极化DP模型并采用EKF算法估计单体SOC值,由单片机进行实时监控,并根据单体SOC值控制电路支路开关实现能量均衡,再通过物联网模块进行远程监测,解决了传统BMS系统扩展性弱等缺点。通过实验验证了该系统可实现电池组远程状态监测与智能化健康管理。

Aiming at the problems of overcharge or overdischarge caused by the inconsistency of long-term use of lithium-ion battery pack due to the parameter difference between single cells,an energy balance system for lithium-ion battery pack based on the Internet of Things is proposed.By establishing a dual-polarization DP model and using the EKF algorithm to estimate the single-cell SOC value,the MCU performs real-time monitoring and the energy balance is realized by controlling the branch switch of the circuit according to the SOC value of the monomer.Through the Internet of Things module,the remote monitoring is realized,which solves the shortcomings of traditional BMS systems such as weak scalability.Experiments show that the system can realize remote condition monitoring and intelligent health management of battery pack.