Battery: Description and Operation

High-voltage Battery

The low-cost nickel-metal hydride battery in the Cayenne S Hybrid uses established technology with impressive characteristics such as outstanding operating reliability and durability. The NiMH battery is housed above the rear axle in the spare-wheel well.

The battery assembly consists of the following components:
- High-voltage battery (in protective housing)
- E-box with service disconnector (allows disconnection of other hybrid components from the power)
- Battery manager (on side of E-box)
- Ventilation system (battery cooling)
- Connections for high-voltage cable
- Sensors in the high-voltage battery (temperature, module voltages)







For reasons of safety, the battery is divided into two units that each contain 140 cells. 10 cells incorporated into each module generate 2 x 144 volts, which are connected in series via the service disconnector to produce a total of 288 volts.

Refer to the following table for more key data relating to the high-voltage battery.










The battery has a total energy content of 1.7 kWh. The operating range in which the energy can be used effectively for propulsion is approx. 30 % - 70 %. The effective battery capacity shown in the display on the instrument cluster and the PCM ranges from 0 % - 100 % and is denoted as a relative state of charge. The display actually indicates approx. 40 % (0.68 kWh) of the total energy content of 1.7 kWh is available for driving under electric power only and as a load volume for recovering energy. This operating range takes into consideration the durability requirements of the battery (cyclical strength) and prevents critical battery conditions such as overload or exhaustive discharge.