Hybrid Vehicle (HV) Battery Pack and Auxiliary Battery

Hybrid Vehicle (HV) Battery Pack and Auxiliary Battery
The Prius contains a high voltage, Hybrid Vehicle (HV) battery pack and a low voltage auxiliary battery. The HV battery pack contains non-spillable, sealed Nickel Metal Hydride (NiMH) battery modules and the auxiliary battery is a typical automotive lead-acid type.

HV Battery Pack



- The HV battery pack is enclosed in a metal case and is rigidly mounted to the cargo area floor pan cross member behind the rear seat. The metal case is isolated from high voltage and concealed by a cover in the cargo area.

- The HV battery pack consists of 28 low voltage (7.2-Volt) NiMH battery modules connected in series to produce approximately 201-Volts. Each NiMH battery module is non-spillable and sealed in a plastic case.

- The electrolyte used in the NiMH battery module is an alkaline of potassium and sodium hydroxide. The electrolyte is absorbed into the battery cell plates and will form a gel that will not normally leak, even in a collision.

- In the unlikely event the battery pack is overcharged, the modules vent gases directly outside the vehicle through a vent hose connected to each NiMH battery module.

Components Powered by the HV Battery Pack
- Electric Motor
- Inverter/Converter
- A/C Compressor
- Electric Generator
- Power Cables

HV Battery Pack Recycling
- The HV battery pack is recyclable. Contact the nearest Toyota dealer, or: United States: (800) 331-4331 Canada: (888) Toyota 8 [(888)-869-6828]

Auxiliary Battery
- The Prius also contains a lead-acid 12-Volt battery. This 12-Volt auxiliary battery powers the vehicle electrical system similar to a conventional vehicle. As with other conventional vehicles, the auxiliary battery is grounded to the metal chassis of the vehicle.

- The auxiliary battery is located in the passenger side rear cargo area. It also contains a hose to vent gases outside the vehicle if overcharged.