高精度电池管理系统AECU的研究与设计

Research and Design of High Precision AECU for BMS

为实现更高精度的数据检测和实时有效的数据传输,研究并开发了高精度电池管理系统采集单元AECU.以飞思卡尔16位单片机为控制核心,采用LTC6804进行动态电压检测,并构建CAN通信电路与电池管理系统顶层的电池组管理单元进行通信,在上位机上实时显示24节单体电池电压.实验结果表明,此电压采集单元性能稳定可靠,单体电压测量精度可以达到2.4mV,平均误差远小于0.5%,在电动车电池管理系统应用中有很大的优势.

In order to achieve higher precision of data detection and real-time data transmission effectively,the voltage detecting unit AECU is designed.This unit takes the freescale 16-bit microcontroller as the core,adopting LTC6804 for dynamic voltage detecting and communicating with the battery management unit through CAN bus.In addition,the voltage of 24 monomer batteries is displayed in real-time on the upper machine.The experimental results show that the performance of this voltage detecting unit is stable and reliable,for monomer voltage measurement precision can reach 2.4 mV and average error is far less than 0.5%,which means this unit has a huge advantage in the application of the battery management system.