What are the working principles of the power lithium battery management system BMS?

From the perspective of working principle, the battery management system BMS collects and calculates current, voltage, temperature, SOC and other parameters to control the on and off of the power supply loop, and reports the collected key data to the vehicle controller, and receives the controller The instructions work in coordination with other systems on the vehicle. Therefore, it is known as the brain housekeeper nanny of the power lithium-ion battery system. The power lithium battery management system BMS is a system that specializes in managing the status of each single battery in the battery pack. Through this system, the status of the entire battery pack can be determined and corresponding control adjustments and strategy execution can be performed according to the status. Generally speaking, the power lithium battery management system is divided into two major modules: master control and slave control. It consists of a central solution unit, a data acquisition module, a data monitoring module, a display unit module, and a control component. Generally, the data information communication between the modules is realized by using the internal CAN bus technology. The central main control module is responsible for the management and control of the entire system, just like a person's brain controls thoughts and then conveys various thoughts to the limbs and controls the activities of the limbs. The terminal module part of the lithium battery is responsible for data collection, including voltage, current, temperature, and signals. The last is the display module to present data to realize human-computer interaction. Based on the functions of each module, BMS can test the voltage, current, temperature and other parameters of the power lithium battery in real time, realize the thermal management, balance management, high voltage and insulation test of the power lithium ion battery, and can calculate the remaining capacity of the power lithium ion battery , Charge and discharge power and SOCu0026SOH status. Based on the cooperation of these modules, various tasks such as battery parameter testing, battery state estimation, online fault diagnosis, battery safety control and alarm, charging control, battery equalization, thermal management, network communication, information storage, electromagnetic compatibility, etc. can be completed. There are various batteries on the market, such as nickel-metal hydride batteries, lithium iron phosphate batteries, polymer batteries, etc., which can be combined into lithium battery packs through various series and parallel connections, and then unified management through the battery management system. The lithium battery management system BMS can quickly and reliably monitor the state of charge (SoC), the state of health (SoH) and the state of function (SoF) according to the starting ability to provide necessary information. Therefore, BMS can minimize the number of car failures caused by accidental battery failure, thereby maximizing the service life and battery efficiency of lithium batteries, and achieving CO2 emission reduction functions. 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: Simple analysis of lithium batteries