Analysis of the structure principle of the battery management system

The battery pack management system (BMS) involves microcomputer technology and testing technology, which dynamically monitors the operating status of battery cells and battery packs, can accurately calculate the remaining power of the battery, and perform charging and discharging protection for the battery to promote it at the best Working status, reduce operating costs and increase service life. The structure of the battery pack management system adopts a modular and distributed design. The system contains a two-level control structure, that is, a local measurement module and a central solution module. Among them, the important function of the central solution module is to use the RS232 interface to communicate with the host computer, and to communicate with the local measurement module in the form of a CAN bus network; the important function of the local measurement module is data acquisition (the most important is the data acquisition of temperature, current and voltage) ), charge and discharge control, power measurement, single battery balance and use CAN bus technology to communicate with the central solution module, etc. The data acquisition module in the battery pack management system is responsible for collecting various status parameters of the battery, such as current, voltage, and temperature; the charging control module automatically charges according to the three stages of pre-charging, constant current charging and constant voltage charging, and according to the collected data Control the charging and discharging process; the equalization module uses the 15W switching power supply to charge a single battery at an appropriate time, so that the batteries in the battery pack are more balanced and consistent; the power estimation unit is mainly to decompose the collected state parameters and based on the research The power estimation algorithm obtained from the experiment estimates the current power of the battery; the data display unit adopts a graphic LCD display, which can display the battery voltage, charge and discharge current, remaining power, battery temperature and charging time; storage communication The unit stores the charge and discharge information (voltage, current, charge and discharge time, etc.) on time through the memory chip, and can 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.