蓄電池均衡模塊的設計

摘要：針對蓄電池組充放電過程中各單體間存在的電壓差問題，設計了一種蓄電池均衡管理模塊。均衡管理模塊采用BQ76PL536芯片進行蓄電池電壓采樣，同時，采用開關矩陣形式進行單節電池充放電電路的切換。本文對均衡模塊的拓撲結構、工作原理以及功率、控制電路進行了分析和設計，采用STM8S208RBT6單片機為控制核心，實現蓄電池單節電池電壓均衡功能；模塊還具備與上位機通訊的功能，可以根據上位機的命令執行操作，更加靈活方便。實驗結果表明，該模塊可以有效降低單體電池間的不一致性，具有良好的均衡精度，提高了蓄電池組工作的效率，并延長了其使用壽命。 敘詞：蓄電池/電壓均衡/開關矩陣/BQ76PL536芯片 Abstract：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. Keyword：Storage battery, Voltage balance , Switch matrix , BQ76PL536 chip