BMS battery management system for lithium batteries is very important and is an essential configuration for lithium batteries, BMS battery management system is commonly known as the battery protection board, the port of the output input of lithium batteries, BMS battery management system mainly manages the charge and discharge power of the battery pack, and the effective management of the battery storage electricity. the BMS management system has the following three main functions.
1, to ensure the safety of the battery: in the process of charging and discharging the battery, real-time collection of the voltage and temperature of the single string cell in the battery pack, charging and discharging current and the total voltage of the battery pack, to prevent the battery from overcharging or over-discharging phenomenon.
2、Accurately estimate the remaining battery power of the battery pack, and forecast how much energy is left in the battery or the state of charge of the energy storage battery at any time. Battery power and voltage have a direct relationship, but not a linear relationship, can not rely on the voltage to convert the remaining power, to be calculated through the BMS.
3、Equalization between single cells: that is, the equalization of charging for single cells, so that each battery unit in the battery pack reaches a balanced and consistent state. Effectively extend the service life of the battery.
BMS technology is difficult, but the unit price is low and the market space is small. Active equalization BMS products are post-cyclical, with the addition of years of use, the willingness to pay for active equalization BMS is expected to increase significantly in order to maintain the range of power lithium batteries.
Battery and BMS belong to two different industries, and the battery factory does not have technical advantages in manufacturing BMS. Compared with the cost of manufacturing the vehicle, the cost of BMS system accounted for a low proportion, the choice of outsourcing is more conducive to cost control.
With the acceleration of the expansion rate of power lithium battery companies, the importance of BMS is becoming increasingly prominent. the core position of BMS in ensuring the safety and life of power lithium batteries is increasingly recognized, due to the three major functions of battery monitoring, SOC evaluation and voltage equalization, BMS has an irreplaceable core position in ensuring the safety of power lithium batteries and improving battery life.
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