TOYOTA Prius battery pack

The battery pack of the 2nd generation Toyota Prius includes of 28 Panasonic prismatic nickel metal hydride modules-each containing six 1.2 volt cells-attached in series to manufacture a small voltage of 201.6 volts. The total number of cells is 168, compared with 228 cells packaged in 38 modules in the first generation Prius. The pack is positioned behind the rear seat.

The weight of the complete battery pack is 53.3 kg. The discharge power capability of the Prius pack is about 20 kW at 50 percent state-of-charge. The power capability improves with higher temperatures and decreases at lower temperatures. The Prius has a computer that’s solely dedicated to maintaining the Prius battery at the optimum temperature and optimum charge stage. The Prius products conditioned air from the cabin as thermal management for cooling the batteries. The air is drawn by a 12-volt blower fitted above the driver’s side rear tire well.