What is the BMS lithium battery protection board? What are the functions of the BMS battery management system?

2021-08-16 09:10:43 0

What is the BMS lithium battery protection board? BMS battery management system function. BMS management system is also called battery protection board. As the application of lithium battery products becomes more and more widespread, there are more and more accidents caused by the use of lithium batteries. In order to ensure product safety, the lithium battery protection board BMS has become a key component in the application of lithium batteries. part. This system can not only improve the safety of the product, but also increase the service life of the product. It is a standard configuration for the production and testing of lithium battery protection boards.

What is the BMS lithium battery protection board?

BMS battery protection board, as the name suggests, the lithium battery protection board is mainly an integrated circuit board that protects the rechargeable (usually refers to the lithium battery). The battery management system (BMS) is mainly to improve the utilization of the battery, prevent the battery from being overcharged and over-discharged, prolong the service life of the battery, and monitor the status of the battery. With the development of the battery management system, other functions will be added.

The main function of the power lithium battery protection board is to provide a lithium battery management system for energy supply for motors, energy storage equipment and other systems. The lithium battery protection board is the charge and discharge protection for the series lithium battery pack; function: effectively improves the charging effect in the series charging mode, and detects the overvoltage, undervoltage, overcurrent, short circuit, and short circuit of each single cell in the battery pack. Over-temperature state protects and prolongs battery life.

At present, single-cell power lithium batteries have basically met the conditions for popularization and application, but the existing group technology, group application technology and equipment level are not yet mature. In other words, single power lithium batteries basically solve the safety and life problems. The key to promoting the development of power lithium batteries is battery pack technology and BMS technology.

BMS battery management system function

1. Monitoring function

The monitoring function is the most basic function of the battery management system, which improves reliable data for the management function. The monitoring content includes the terminal voltage, current, temperature and other parameters of the battery.

2. Protection function

Protection functions include overcharge protection, overdischarge protection, short circuit protection, reverse connection protection, overload protection, temperature protection, etc.

3. Metering function

The metering function is to dynamically report the SOC status of the battery during use. In theory, there is a certain corresponding relationship between the voltage and capacity of the battery. The SOC data during use and the theoretical SOC data are compared to judge the battery. Life.

4. Control function

The state of the battery is connected with the external connection through the interface and communication protocol to realize the function of automatic control or remote control.

The battery management system BMS mainly covers the following functions

1) Battery working status monitoring: mainly refers to real-time monitoring or calculation of a series of battery-related parameters such as battery voltage, temperature, working current, battery power, etc. during the working process of the battery, and judging the current battery status based on these parameters. In order to carry out the corresponding operation, prevent the battery from overcharging or overdischarging.

2) Battery charging and discharging management: During the charging or discharging of the battery, the charging or discharging of the battery is managed according to the environmental state, battery state and other related parameters, and the optimal charging or discharging curve of the battery (such as charging current, charging Upper limit voltage value, discharge lower limit voltage value, etc.)

3) Balance between single cells: that is, the single cells are balanced and charged, so that each battery in the battery pack reaches a balanced and consistent state. The equalizer is the core component of the battery management system, but the current domestic technology in this area is not yet mature.

Summary: The above is an introduction to the functions of the BMS battery management system, which is widely used. With many electronic devices that require battery supply, the usage of rechargeable batteries has increased dramatically. To ensure that the battery is properly charged and optimize its service life, battery management or fuel gauge systems grow in parallel. The BMS lithium battery management system is now complete.