Sanyo Electric Co Ltd exhibited a Li-ion rechargeable battery module for hybrid vehicles and a Li-ion rechargeable battery cell for plug-in hybrid vehicles at the 40th Tokyo Motor Show, which is open to public from Oct 27 to Nov 11, 2007 (Fig. 1).
The battery module for hybrid vehicles measures 800 × 322 × 120mm, weighs 37.5kg and has a capacity of 31L (Fig. 2). Using 72 cells connected in series, the module reportedly generates a voltage of 266V.
The company did not reveal the electric power capacity and output of the module. But assuming that the current capacity of the cell is 6-6.5Ah, which is on par with that of the existing Ni-MH rechargeable batteries designed for hybrid vehicles, the power capacity is expected to reach approximately 1.6-1.7kWh.
The company did not unveil the details of the cell, either. But Mitsuru Honma, senior vice president of Sanyo Electric, mentioned the cell for hybrid vehicles that was under development at 2007 Tokyo Automotive Conference, which ran from Oct 22-23, 2007, prior to the Motor Show
"The cell achieved an energy density of 90Wh/kg and output density of 3,500W/kg," he said. "It allows an input density of 3,300W/kg even at the time of regeneration."
The company also exhibited a Li-ion rechargeable battery cell for plug-in hybrid vehicles at its exhibition booth. The cell has a current capacity of 20Ah. The dimensions and weight were not revealed (Fig. 3).