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Balance Function of Electronic Scale Lithium Battery Protection Board
2022-03-10
Electronic scale lithium battery protection board equalization principle: common equalization charging skills include stable shunt resistor equalization charging, on-off shunt resistor equalization charging, uniform battery voltage equalization charging, switching capacitor equalization charging, buck converter equalization charging, inductive equalization charging, etc. When charging a group of lithium batteries in series, please make sure that each battery is charged evenly. Otherwise, the battery performance and life of the whole group will be affected in the application. The current one Li-ion battery protection chip does not include the equalization charging control function, and the equalization charging control function of multiple Li-ion battery protection chips requires an external CPU; this is achieved through serial communication with the I2C bus and other protection chips, which will increase the clutter and planning difficulty of the protection circuit, reduce the power and reliability of the system, and increase power consumption.
Electronic scale lithium battery protection board equalization principle is according to the needs of the application, after changing the type of protection chip and the number of series connection, the power level of switching devices and energy consumption components in the circuit, can be completed for any structure and voltage level of power lithium battery protection and equalization charge.
Lithium battery as a relatively large electric storage capacity, is used in a variety of server rooms, communication base stations, data centers and other areas. Lithium battery protection board has the role of protecting the battery from overcharging.
Lithium battery protection board forced equalization and automatic equalization. Although the battery itself still has available capacity, the battery system cannot continue to perform as it should due to the imbalance between the batteries and the limitation of the safety voltage set for the protection of the battery. In addition, the number of life of the battery in the vehicle is shorter than the life of the vehicle itself, and even if the vehicle does not reach its end-of-life, the battery must be replaced to meet the power performance. However, the cost of battery replacement is quite high, which greatly limits the development of electric vehicles.
The main cause of battery imbalance is temperature. In general, the life of a lithium-ion battery decreases by half when its operating ambient temperature exceeds its optimal temperature by 10°C. Since the number of series connections of the on-board battery system is very large, generally between 88 and 100 series connections, their capacity is 20 to 60kWh depending on the orientation of each battery column carrying different temperature differences. Even in the same battery box, there is a temperature difference due to the orientation and the heat of the battery, and this temperature difference can have a significant adverse effect on the battery life, resulting in unbalanced battery generation, reduced range and shortened cycle life. Due to these problems, the overall capacity of the battery system can not be fully utilized, the loss of the composition of the battery system, delaying the abandonment of such a system will significantly extend the life of the battery system used.
Electronic scale lithium battery protection board equalization principle is according to the needs of the application, after changing the type of protection chip and the number of series connection, the power level of switching devices and energy consumption components in the circuit, can be completed for any structure and voltage level of power lithium battery protection and equalization charge.
Lithium battery as a relatively large electric storage capacity, is used in a variety of server rooms, communication base stations, data centers and other areas. Lithium battery protection board has the role of protecting the battery from overcharging.
Lithium battery protection board forced equalization and automatic equalization. Although the battery itself still has available capacity, the battery system cannot continue to perform as it should due to the imbalance between the batteries and the limitation of the safety voltage set for the protection of the battery. In addition, the number of life of the battery in the vehicle is shorter than the life of the vehicle itself, and even if the vehicle does not reach its end-of-life, the battery must be replaced to meet the power performance. However, the cost of battery replacement is quite high, which greatly limits the development of electric vehicles.
The main cause of battery imbalance is temperature. In general, the life of a lithium-ion battery decreases by half when its operating ambient temperature exceeds its optimal temperature by 10°C. Since the number of series connections of the on-board battery system is very large, generally between 88 and 100 series connections, their capacity is 20 to 60kWh depending on the orientation of each battery column carrying different temperature differences. Even in the same battery box, there is a temperature difference due to the orientation and the heat of the battery, and this temperature difference can have a significant adverse effect on the battery life, resulting in unbalanced battery generation, reduced range and shortened cycle life. Due to these problems, the overall capacity of the battery system can not be fully utilized, the loss of the composition of the battery system, delaying the abandonment of such a system will significantly extend the life of the battery system used.
