Question: An electric car uses a 45-kW (160-hp) motor. If the battery pack is designed for 340V, what current would the motor need to draw from the battery?

Calculating Current Draw for an Electric Car Motor

12 Aug 2021

The formula of electric power is given as follows:

Power = (Voltage)(Current)

Current = Power/Voltage

In this question, we have:

Power = 45 KW = 45000 W

Voltage of Battery Pack = 340 V

Current needed to be drawn = ?

Therefore,

Current = 45000 W / 340 V

Current = 132.35 A

The motor needs to draw 132.35 Amperes current from the battery.