What is bms battery management system

bms battery management system is a control system that protects the safety of power batteries. It is mainly used to intelligently manage and maintain each battery unit, prevent the battery from overcharging and over-discharging, extend the service life of the battery, and monitor Battery status. The BMS battery management system unit includes a BMS battery management system, a control module, a display module, a wireless communication module, electrical equipment, a battery pack used to power electrical equipment, and a collection module used to collect battery information from the battery pack.

The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

The bms battery management system is commonly known as battery nanny or battery butler. It is mainly used to intelligently manage and maintain each battery unit, prevent the battery from overcharging and over-discharging, extend the service life of the battery, and monitor the status of the battery. .

The bms battery management system is a control system that protects the safety of power batteries. It monitors the usage status of the battery at all times, takes necessary measures to alleviate the inconsistency of the battery pack, and provides guarantee for the safety of new energy vehicles.

The BMS battery management system unit includes the BMS battery management system, control module, display module, wireless communication module, electrical equipment, battery packs used to power electrical equipment, and batteries used to collect battery packs Information collection module, the BMS battery management system is connected to the wireless communication module and the display module respectively through the communication interface, the output end of the collection module is connected to the input end of the BMS battery management system, the BMS battery management system The output end of the system is connected to the input end of the control module. The control module is connected to the battery pack and electrical equipment respectively. The BMS battery management system is connected to the Server through the wireless communication module.

System architecture

1. Main board: collects sampling information from each slave board, communicates with the vehicle through the low-voltage electrical interface, and controls the action of the relay in the BDU. Monitor the various statuses of the battery to ensure the safe use of the battery during charging and discharging;

2. Slave board: monitor the module's cell voltage, cell temperature and other information, and transmit the information to the main board. With battery balancing function, the communication method between the slave board and the main board is usually CAN communication or daisy chain communication (a communication method from the center to the periphery like a daisy shape);

3. BDU: through high-voltage electrical interface Connected to the vehicle's high-voltage load and fast-charging harness, including pre-charging circuit, total positive relay, total negative relay, fast-charging relay, etc., controlled by the main board;

4. High-voltage control board: can be integrated on the main board, It can also be used independently to monitor the voltage and current of the battery pack in real time, and also includes precharge detection and insulation detection functions.

System functions

The BMS battery management system implements the following functions:

• (1) Measurement of battery terminal voltage

• (2) Energy balance between single cells:

  is the balanced charging of single cells, so that each battery in the battery pack reaches a balanced and consistent state. Balancing technology is a key technology for battery energy management systems that the world is currently researching and developing.

• (3)Battery pack total voltage measurement

• (4)Battery pack total current measurement

• (5)SOC calculation

  Accurately estimate the state of charge (SOC) of the power battery pack, that is, the remaining battery power, to ensure that the SOC is maintained within a reasonable range and prevent overcharging. Or damage to the battery due to over-discharge,

• (6) Dynamically monitor the working status of the power battery pack:

  During the battery charging and discharging process, collect the real-time information of the battery pack The terminal voltage and temperature of each battery, the charge and discharge current and the total voltage of the battery pack are used to prevent the battery from overcharging or over-discharging.

• (7) Real-time data display

• (8) Data recording and analysis

  Also select problematic batteries , to maintain the reliability and efficiency of the entire battery pack.

• (9) Communication networking function

BMS battery management system is of great significance to protect the safety of electric vehicles, charging station equipment and personnel Whether BMS can be used normally in extreme environments of high and low temperatures remains to be verified. Relevant R&D staff should actively explore and continuously research new technologies to promote the upgrade of BMS battery management systems and better meet people's daily needs.

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