A 48-volt battery pack works with the motor generator to create:
- a seamless start/stop function;
- a short-duration torque addition to the engine crankshaft in particular driving conditions; and,
- brake energy regeneration to increase efficiency and responsiveness.
When the engine is running, eTorque's motor generator unit delivers 48-volt current to a 430 watt-hour lithium-ion Nickel Manganese Cobalt (NMC)-Graphite battery. The battery pack includes a 3-kilowatt DC-to-DC converter. This holds the battery's charge and converts 48 volts to 12 volts so that power can be use to power Jeep Wrangler's accessories
and charge its conventional 12-volt lead-acid battery.
About the size of a small suitcase, the air-cooled battery pack is mounted to the interior rear wall of Jeep Wrangler's cabin. The battery pack's case is insulated to hush the noise generate by the dual cooling fans. Cooling air is then drawn from the vehicle interior and released through the built-in cabin exhausters.