What unique feature serves as both an energy storage device and a source that helps propel the vehicle?

The traction battery is a critical component in electric and hybrid vehicles, as it serves the dual purpose of energy storage and propulsion. This type of battery stores electrical energy, which powers the electric motor when the vehicle is in motion. Unlike traditional batteries found in internal combustion engine vehicles, the traction battery is specifically designed to deliver high power output and maintain efficiency during operation.

When the vehicle accelerates, energy from the traction battery is used to power the electric motor, propelling the vehicle forward. Additionally, this battery can be recharged through external electric power sources or regenerative braking, which captures energy that would otherwise be lost during deceleration and returns it to the battery. This capability enhances overall energy efficiency and performance, making the traction battery integral to the functioning of electric vehicles.

Other options provided do not fulfill both roles as effectively. For instance, a power inverter converts direct current (DC) from the battery to alternating current (AC) for the motor but does not store energy itself. A charging cable is used to transfer electricity to the vehicle for charging but does not store energy or propel the vehicle. An energy capacitor can store electrical energy temporarily but is not typically used for long-term storage or propulsion in vehicles. Thus, the traction battery is definitively the