To choose the right continuous current of bms battery, the first to figure out the single string undervoltage protection voltage, and the output power (motor). Depending on the material, the corresponding undervoltage protection values are as follows:
Li-ion (3.7V), LifePo4 (3.2V)
For example, 48V battery in Li-ion cell, 500W motor, calculate how much continuous current is needed for the protection board BMS?
Continuous Current= β500W/(3.7V*13)=10.40β
- β is the coefficient, according to different uses, the coefficients are as follows.
‘Electric bicycle: β=1.5； Two-wheeled electric motor:β=2
’Three-wheeled electric motorcycle: β=3； Four-wheeled low-speed vehicle: β=4