Powertrain Electrification Power Electronics

High Voltage Power Box

Last update: 05 Sep. 2023

What is a high voltage box?

The High Voltage Power Box combines the functionality of an Onboard Charger (OBC), a DC/DC converter and a PDU (Power Distribution Unit). The OBC is the interface between the car and the public grid. It converts the energy from the network grid AC (Alternative Current) source to DC (Direct Current) voltage of the car high voltage battery in respect with the public grid and the regulations.

The DC/DC converter stage manages the energy flow between the high voltage network (HV – typically between 300V and 900V) and the low voltage network (e.g. lights, infotainment, power steering, 12V battery, etc.).

The PDU enables the connections with all HV units (loads, supply) in a single location in the vehicle. The outlets can be fused in-line with the vehicle safety analysis. An HV interlock can be also incorporated to monitor the connector integrity.

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What are Valeo high Voltage power box benefits?

  • Packaging and weight savings by combining the three functions
  • Scalable platform: from 400V to 900V
  • Wide input range, 1 phase & 3 phase
  • Bidirectional power flow (V2X)

Valeo high Voltage power box specifications - OBC

  • Output power 7.2 - 22 kW
  • Char. voltage 200 - 920V
  • Input power 85 - 275V, 45-65 Hz
  • Efficiency up to 96%
  • Power density up to > 2 kW/l

Valeo high Voltage power box specifications - DC/DC

  • Up to 4 kW
  • Efficiency > 95%
  • ASIL C

Vehicle type

  • Passenger car
  • Bus
  • Truck
  • Robot taxi
  • Motorcycle
  • Bike
  • Droid
  • Off road

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