Based On Stm32f103zet6 Power Battery Management System Design

With the growing global energy and environmental problems, Electric Vehicle(EV) will gradually become the future mainstream transport, and the research of the EV will attract unprecedented attention. Power battery is the bottleneck in the development of EV and the Battery Management System (BMS) can effectively improve the efficiency of the battery, and ensure the reliability and safety of the battery pack. Driven by the project of "the development of the training platform for power lithium battery management system", a smart Battery Management System (BMS)based on STM32F103ZET6is designed. Specifically, the main tasks completed in this paper are as follows:(1) Based on a thorough study and analysis of the working principle and characteristics of LiFePO4batteries, the basic functions and overall program of the battery management system are determined.(2) The design of hardware circuit of the distributed battery management system is completed, including acquisition board and control board. The control board is the core of the system and contains many modules, such as the minimum system, power supply module, data acquisition module, communication modules, human-machine interaction module and so on. Acquisition board is used to detect the parameters of single battery and communication with the control board by CAN bus.(3) The design of software of the battery management system based on Embedded real-time operating system-μC/OS-Ⅱ is completed. The task contains the transplant operating system and application software development. The software of BMS is composed of multiple modules, such as:event management task, Sensor acquisition task, display task, the CAN data processing task and so on.(4) A smart battery model is established by MATLAB-Simulink kit. In view of the current mainstream battery equalization scheme, this paper designs a "Balanced Simulation Module" to verify its balancing effect, and lay the foundation for the subsequent development.Finally, the system online debugging of system hardware and software is done, the results show that the battery management system can accurately and stably run and achieve the expected function.