Nickel/metal-hydride battery for hybrid electric vehicles

摘要

The Nickel/metal-hydride battery shows such great promise for pure electri vehicle (PEV) use that recently many vehicle manufacturers have decided to adopt it for their electric vehicles. With its high power and long life characteristics, it is also very promising for hybrid electric vehicle (HEV) use. In fact, we have developed a new energy storage system for HEV's, based on a small cylindrical nickel/metal hydride (NiMH) battery, that has high power and excellent ability to accept high-power energy from regnerative braking. The battery cell has more than 500W/kg of specific power, more than 400W/kg of specific regenerative power and 10-year estimated life time. The battery pack for a parallel hybrid vehicle, which is composed of 240 battery cells and a management system has displayed fairly good performance in power characteristic and onboard durability.