基于MC9S12与LTC6811的储能电站电池管理系统设计

设计了一种用于储能电站的电池管理系统(BMS)。基于储能电站BMS拓扑结构及锂电池的特性,设计了一种以Freescale单片机和ADI电池管理芯片(MC9S12与LTC6811)为核心的BMS。该BMS可实现对多路电池电压、温度采集及均衡控制;同时,可根据采样数据利用改进型安-时积分法进行电池荷电状态(SOC)计算。根据现场实际数据,将电池电压、温度的采样值与实际值比较,同时对电池均衡效果及SOC进行分析。试验结果证明,设计的BMS具有较高的采样精度和采样速度,均衡控制合理,SOC估算值误差较小,验证了所设计BMS的实用性。

Design of Battery Management System for Energy Storage Power Station Based on MC9S12 and LTC6811

A battery management system (BMS) for energy storage power station is designed. Based on the topology of the BMS of energy storage power station and the characteristics of lithium batteries, a BMS with Freescale microcontroller unit (MCU) and ADI battery management chip(MC9S12 and LTC6811) as core devices is designed. BMS can realize the voltage and temperature collection and balanced control of the batteries of multiple circuits. Meanwhile, based on the sample data, the state of charge (SOC) of the battery can be calculated by utilizing the designed improved ampere hour integration method. Based on the real data, the sampled values of battery voltage and temperature are compared with the real values, meanwhile the balanced effects and SOC are analyzed. Experimental results prove that the designed BMS has high sampling accuracy and sampling speed, and the balanced control is reasonable. The error of the estimated SOC value is small, indicating the practicability of the designed BMS.