Hybrid Vehicle (HV) Battery Pack Auxiliary Battery

The RX 400h contains a next generation 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 cabin area floor pan cross member under the rear seat. The metal case is isolated from high voltage and concealed by a cover in the cabin area.

- The HV battery pack consists of 30 low voltage (9.6-Volt) NiMH battery modules connected in series to produce approximately 288-Volts. Each NiMH battery module is non-spillable and sealed in a metal 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. HV Battery Pack Battery pack voltage 288-Volts Number of NiMH battery modules in the pack 30 NiMH battery module voltage 9.6-Volts NiMH battery pack dimensions 25 x 43 x 7 in (63 x 108 x 18 cm) NiMH battery Pack weight 152.1 lbs (69 kg)

Components Powered by the HV Battery Pack
- Front Electric Motor
- Rear Electric Motor (with 4WD)
- Inverter/ Converter
- A/ C Compressor
- Electric Generator
- Power Cables
- Electric Power Steering

HV Battery Pack Recycling
- The HV battery pack is recyclable. Contact the nearest Lexus dealer or Lexus Roadside Assistance at:
United States: (800) 255-3987
Canada: (800) 265-3987

Auxiliary Battery
- The RX 400h also contains a lead- acid 12- Volt battery. The 12- Volt auxiliary battery powers the vehicle electrical system similar to a conventional vehicle. As with conventional vehicles, the auxiliary battery is grounded (negative pole) to the metal chassis of the vehicle.

- The auxiliary battery is located in engine compartment area. 288- Volt HV Battery Pack 12- Volt Auxiliary Battery in Engine Compartment. HV Battery Pack Mounted in Cabin Area