Analyze the structural principle of the battery management system

The structure principle of the battery management system The battery management system is mainly composed of charging module, data acquisition module (including voltage, current, temperature data acquisition), balance module, power calculation module, data display module and storage communication module. It is important for the use of battery packs. Manage and protect. The structure of the battery management system The battery management system (BMS) involves microcomputer technology and detection technology. It can dynamically monitor the operating status of the battery cell and the battery pack, accurately calculate the remaining battery charge, realize the charge and discharge protection of the battery, and promote The battery is in the best working condition, which reduces the operating cost and increases the service life. The structure of the battery management system is modular and distributed. The system consists of a two-level control structure, namely, a local measurement module and a central processing module. Among them, the important function of the central processing module is to communicate with the host computer through the RS232 interface, and to connect with the local measurement module in the form of a CAN bus network. The important functions of the local measurement module are data acquisition (mainly temperature, current, and voltage data acquisition), charge and discharge control, power measurement, single cell equalization, and the use of CAN bus technology to communicate with the central processing module. The data acquisition module in the battery management system is responsible for collecting various state parameters such as battery current, voltage, temperature, etc. The automatic charging of the charging control module is divided into three stages: pre-charging, constant current charging, and constant voltage charging. The charging and discharging process is controlled according to the collected data. When appropriate, the equalization module can charge a single battery evenly through a 15W switching power supply, so that the batteries in the battery pack are more balanced and consistent. The power estimation unit mainly analyzes the collected state parameters, and estimates the current power of the battery according to the power estimation algorithm obtained from the research experiment. The data display unit adopts graphic LCD display, which can display battery voltage, charge and discharge current, remaining power, battery temperature and charging time. The storage and communication unit periodically stores charge and discharge information (voltage, current, charge and discharge time, etc.) through the memory chip. Communicate with the computer through the serial port, and display the charge and discharge information on the computer. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Analysis of battery internal resistance measurement methods