I am working on a robotics project where we are currently designing a battery. This battery is specific for a motor driver and two BLDC motors. I would like to know how much current will be drawn from the battery if we drive the robot at some speed. More specifically, How do you calculate the speed of a BLDC motor under some load, and the current needed for that speed. Our design has rear wheel drive as well as the motors connected to gear system that turns the wheels.
Links to Motors/Driver: