What Is an EV Traction Battery?

An EV traction battery is a high-voltage lithium-ion energy system that delivers strong, instant power to the electric motor. It enables electric vehicles to achieve high performance, fast acceleration, long driving range, and efficient energy use.

To better understand a traction battery, let's look at how EV traction battery packs are constructed.

How an Electric Vehicle Lithium-Ion Traction Battery Pack Is constructed?

An EV traction battery is constructed in three layers:

• Cells: Individual lithium-ion units

• Modules: Multiple cells connected for stable voltage and capacity

• Battery Pack: Several modules assembled with a BMS, cooling system, and high-voltage protection inside a sealed, reinforced casing

This structure ensures safety, reliability, and long cycle life.

Where Traction Batteries Are Installed

• Passenger EVs:  the battery pack is typically located along the floor pan of the vehicle, in a rectangle or 'T" shape.

• Commercial & Public Transport EVs: May include multiple battery packs placed at the front, rear, sides, or roof to meet high energy demands .