Volvo Car Corporation

Axel Vänerhav

Fabian Fogelberg

Jonas Forssell

Robert Eriksson

Petter Almhagen

Andreas Eriksson

Tobias Stalfors

Sofia Lorensson

Peter Bengtsson

Jan Muller

Jonas Sjogren

Anders Belfrage

A method for reactivation of an electrical system of a vehicle comprising a first electrical system operating at a first lower voltage and a second electrical system operating at a second higher voltage, comprising: detecting a fault or a crash situation in the second electrical system; disconnecting a power source of the second electrical system; determining the fault of the second electrical system is no longer present or that the crash situation is resolved; reconnecting the power source to the second electrical system and increasing the voltage of the second electrical system from zero to an intermediate voltage lower than the second voltage; and if a detected current in the second electrical system is higher than a current threshold value; or if a detected voltage of the first electrical system is higher than a voltage threshold value; reducing the voltage of the second electrical system to zero.

Method and system for controlling an electrical system

A mounting base can comprise: a group of mounting areas, each mounting area of the group of mounting areas comprising: a respective mechanical connector member of a group of respective mechanical connector members for attaching to a complementary mechanical connector member on each direct-current to direct-current (DC/DC) converter unit of the group of DC/DC converter units, and a respective electrical connector of a group of respective electrical connectors for attaching to a complementary electrical connector on each DC/DC converter unit of the group of DC/DC converter units, a group of electrical conductors attached to the group of respective electrical connectors in each mounting area, and attached to a main connector on the mounting base for connecting to a high-voltage (HV) connector of a main HV supply, and a cooling channel extending in heat conducting contact with the group of mounting areas.

Modular power supply

A power supply system for a vehicle, the system including: a battery pack including at least two parallel strings of battery cells, each string forming a battery having a first output voltage; a switch mechanism configured to connect one of the at least two batteries to a first battery pack output terminal, wherein the first battery pack output terminal is connected to a first power consumer; and a multichannel DC/DC converter having an input terminal connected to the first battery pack output terminal, the multichannel DC/DC converter including a plurality of outputs, wherein at least one of the plurality of outputs is configured to provide a second voltage, the second voltage being lower than the first voltage, and wherein the at least one output of the multichannel DC/DC converter is connected to a second power consumer.

Vehicle power supply system with redundancy and method for controlling the power supply system

A voltage supply unit for a vehicle is described, the voltage supply unit having a first output adapted to supply a first voltage to a first load and a second output adapted to supply a second voltage to a second load. The second voltage is obtained by a DC/DC converter powered by the first voltage, where the low voltage side of the DC/DC converter is connected to the second output and the high voltage side of the DC/DC converter is connected to the first output. Two different voltages can thereby be supplied by the use of one battery.

Dual voltage unit for a vehicle

Growing community of inventors

Lerum, Sweden

Axel Vänerhav