基于双Cuk电路电池主动均衡系统的控制与优化  

Control and optimization of battery active balancing system based on double⁃cuk circuit

作　　者：范庆坤 覃庆良[1] FAN Qingkun;QIN Qingliang(College of Automation and Electronic Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学自动化与电子工程学院,山东青岛266061

出　　处：《电子设计工程》2024年第21期94-98,共5页Electronic Design Engineering

摘　　要：针对新能源电池间电压不均衡现象,采用了一种基于非隔离式主动均衡闭环自适应调节的控制均衡方法。使用意法半导体STM32F407VET6作为主控与BMS上位机和车机进行交互;使用上海琪埔维半导体提供的XL8812车规级芯片作为电压采集芯片。该方案已打板测试,实现了4~240节电池电压测量,以12节电池为一组可以进行主动均衡。主控输出两路互补带死区频率和占空比均可调节的双路PWM信号,通过光隔离放大来驱动均衡电路。得出“削峰填谷”的策略,成功地将电压较高的电量转移到电压较低的电池单体中。In response to the voltage imbalance phenomenon among new energy batteries,this study proposes a control and balancing method based on non⁃isolated active balancing with closed⁃loop adaptive regulation.The STM32F407VET6 microcontroller from STMicroelectronics is utilized as the main controller for interacting with the Battery Management System(BMS)and the vehicle′s onboard computer.The XL8812 automotive⁃grade chip provided by Shanghai Chipways Semiconductor is employed as the voltage acquisition chip.The proposed method has undergone extensive board testing,demonstrating the capability of measuring battery voltages in series configurations ranging from 4 to 240 cells,with each group of 12 cells capable of active balancing.The main controller outputs two channels of Pulse⁃Width Modulated(PWM)signals with adjustable complementary dead⁃band frequency and duty cycle.By employing opto⁃isolated amplification,the balancing circuit is successfully driven to transfer excess charge from higher voltage cells to lower voltage cells using a"peak shaving and valley filling"strategy.

关 键 词：电压不均衡 主动均衡 XL8812 光隔离放大电路 削峰填谷 

分 类 号：TN710[电子电信—电路与系统]