The US Army has contracted EnerDel to develop a next-generation battery system for the hybrid version of the high-mobility multipurpose wheeled vehicle (Humvee), the XM1124.

Under the $1.29m contract, the company will produce four custom-built high-performance lithium-ion battery systems for two different applications.

EnerDel’s battery chemistries include lithium-manganese spinel chemistry, designed for extending electric vehicle range or electronic systems runtime, and a lithium-titanate system designed for extreme high-power hybrids that require hard acceleration and braking.

The robust battery technology also features an all-electric silent watch that will power the electronics without running the truck’s diesel generator and reduce audible and thermal signatures of the vehicle.

As a hybrid version of the conventional M1113 Humvee, the XM1124 Humvee features a higher top speed, faster acceleration, longer range and improved fuel economy.

The army is also reasearching the potential of the XM1124 Humvee equipped with EnerDel battery technology to function as a portable power plant to power a mobile command post or field hospitals.

Work will be carried out for the next 18 months in collaboration with US Army Tank Automotive Research, Development and Engineering Center (TARDEC) which will be testing the two battery systems.