If you could convert the single battery's voltage to motor voltage at 100% efficiency (& you cant) then current at current = Power/Volts = 8200W/3.2V =~ 2500 A. (!!!!) . 10 cells in series give you 10 x the run time (30+ minutes) at 1/10th the current (250A) and you are beginning to get realistic. Beginning. ...
The battery of an EV is specified based on its energy storage capability. Similar to the size of the fuel tank in your petrol car, storage capacity has nothing to do with engine or motor power. A 50kW motor running at maximum power will consume 50kWh of battery energy in one hour.
Electric motors may be classified by considerations such as power source type, construction, application and type of motion output. They can be brushed or brushless, single-phase, two-phase, or three-phase, axial or radial flux, and may be air-cooled or liquid-cooled. Standardized motors provide power for industrial use.
An electric motor has two mechanical parts: the rotor, which moves, and the stator, which does not. Electrically, the motor consists of two parts, the field magnets and the armature, one of which is attached to the rotor and the other to the stator. Together they form a magnetic circuit.
The current will be from 0amps to however much the battery can supply without frying. What decides how much current goes through the motor? The current will decrease with speed; the more force there is trying to slow the motor down, the slower it will go and the more current it will draw.
Electric motors operate on one of three physical principles: magnetism, electrostatics and piezoelectricity. In magnetic motors, magnetic fields are formed in both the rotor and the stator. The product between these two fields gives rise to a force and thus a torque on the motor shaft. One or both of these fields changes as the rotor turns.