Battery Disconnect Unit
Application description
The Battery Disconnect Unit, or BDU, is a sub-unit inside/outside the battery pack in high-voltage electrical or hybrid systems.
It can be installed in the battery housing either in the “chocolate bar” in the cell pack or on top of the battery housing (so-called “penthouse” location).
This sub-unit is responsible for monitoring, activating, and deactivating the high-voltage battery system.
It (dis-)connects the battery to the vehicle’s high-voltage powertrain and charging systems. It also performs overcurrent / short circuits detection enabling related safety interruptions.
Key Facts
- Space-saving
- Easy installation and integration
- Good heat dissipation
- Good electrical insulation
Benefits
- Localized HV interfaces or Plug-type HV-connectors
- Small volume design:
- Weight: 5 kg
- Volume: 6 liters
- Different contactor and switch-off components:
- Main contactors / Contactors for DC charging
- Pre-charge circuit
- HV fuse
- Pyro Fuse or Pyro Switch
- Customization of various battery designs
- Voltage, current and temperature measurements
