蓄电池均衡模块的设计

Design of Battery Balance Module

针对蓄电池组充放电过程中各单体间存在的电压差问题,设计了一种蓄电池均衡管理模块。均衡管理模块采用BQ76PL536芯片进行蓄电池电压采样,同时,采用开关矩阵形式进行单节电池充放电电路的切换。本文对均衡模块的拓扑结构、工作原理以及功率、控制电路进行了分析和设计,采用STM8S208RBT6单片机为控制核心,实现蓄电池单节电池电压均衡功能;模块还具备与上位机通讯的功能,可以根据上位机的命令执行操作,更加灵活方便。实验结果表明,该模块可以有效降低单体电池间的不一致性,具有良好的均衡精度,提高了蓄电池组工作的效率,并延长了其使用寿命。

For the problem of storage battery voltage difference during charge and discharge between the single-cell battery, designed a management module for balance of battery. Sampling battery voltage by BQ76PL536 chip, and using switch matrix form for switching charge or discharge of single-cell battery. This paper analysis and design the balance circuit topology, working principle and power, control circuit, using STM8S208RBT6 as microcontroller core, to achieve single-cell battery voltage balancing. The module also has the function of communication with the host computer, can perform actions based on the host computer commands, more flexible and convenient. The experimental results show that this module can effectively reduce the inconsistencies between the single-cell and has a good balance accuracy, improve the work efficiency of the battery pack, and extend its service life.