Key Features

• The bZ4X is Toyota’s first battery electric vehicle based on the e-TNGA platform which was jointly developed with Subaru.
• Depending on the market and powertrain type, different battery pack variants are installed.
  
  • 71.4 kWh* (assumed supplier: Prime Planet Energy & Solutions)
  • 72.8 kWh (assumed supplier: CATL)
• The electric drive units (e-motor, inverter & gearbox) for the vehicle are developed and produced by BluE Nexus, a joint venture by AISIN and DENSO.
  • Front-wheel drive: 1 x 150 kW
  • All-wheel drive: 2 x 80 kW*
• On-board charger, 12 V DC/DC converter and other HV functions are combined in an electricity supply unit provided by DENSO.

*: Covered in the FEV benchmarking program

HV Battery

• Assumed cell supplier is Prime Planet Energy & Solutions (PPES), a joint venture between Panasonic and Toyota.
• In total 96 prismatic cells are equally distributed among 4 battery modules and connected in series to deliver the nominal voltage level of 355 volts.
• The battery cells are liquid cooled (water-glycol mixture) using a separate cooling plate.
• Main housing components are made of steel sheet metal (main housing & cover) and aluminum (extruded side profiles & underbody protection plate).

Front & Rear EDU (Electric Drive Unit)

• The electric drive units (EDUs) were developed by BluE Nexus, a joint venture of Aisin and Denso.
• Each EDU includes:
  
  • Integrated inverter using Denso semiconductors
  • Oil-cooled PMSM motor with hairpin windings
  • 1-speed reducer gearbox
• To realize economies of scale, several identical parts are used for front and rear EDU.
• A park lock is included in the front EDU, park lock gear and intermediate gear are realized as one component.

Electricity Supply Unit (ESU)

• The Toyota bZ4X is equipped with an Electricity Supply Unit (ESU) provided by Denso that combines several power electronics functions:
  
  • Power distribution to the electric drive units, HV battery, cabin heater and A/C compressor
  • 12 V DC/DC converter
  • On-board charger
• Two cast housings are used to integrate the functions:
  Power distribution in the upper housing, DC/DC converter & on-board charger in the lower housing
• Liquid cooling (water glycol mixture) is only applied to the components located in the lower housing.