For subscribers
Torque Shop: EV power and battery’s state of charge
Sign up now: Get ST's newsletters delivered to your inbox
The voltage of EV batteries stays within a narrow band of the maximum voltage, even as SOC begins to drop.
PHOTO: ST FILE
Follow topic:
When an electric vehicle’s (EV) battery starts to discharge, does it not mean that the voltage will also drop? If this is the case, then the available power to drive the motor will drop proportionately. But in my experience, I do not notice this to be the case with my Hyundai Kona EV. Why?
Every EV today has a sophisticated battery management system (BMS). It monitors and controls several parameters, including temperature, current, voltage and state of charge (SOC). The BMS also maintains the charge-balance of the several thousand individual cells in a battery pack.
