Kawasaki Heavy Industries Ltd. (KHI) will start producing grid and transportation application versions of the Gigacell bipolar NiMH Industrial batteries
The Gigacell was developed in cooperation with New Energy and Industrial Technology Development Agency (NEDO) of Japan. It offers a big capacity in storing energy which is made responsible by its high-rate structure, discharge ability and high rate charge. It used nickel hydroxide as its positive electrode while utilizing the metal hydroxide for its negative electrode.
KHI is also designing a 280Ah stack with an enhanced charging and discharging rates. It has 2.5 kWh of aptitude and volumetric density of 40 Wh/L and 21 Wh/kg gravimetric density.
Last December 2007, KHI declared that it had completed a verification test using a Gigacell pack on a railcar regenerative braking. The system was analyzed at the substations of the Osaka Subway.
Kawasaki confirmed that the generated energy by the braking of a train could be accumulated and be reused to counterweigh for the voltage fluctuations that take place during start-up, operation, and jam-packed rush hours.