Volvo Truck Corporation

Volvo Construction Equipment Ab

Frederic Leroy

David De Brito

Maxime Valero

Julien Maitre

Grégoire Artur Du Plessis

A method for controlling an electrical system of an electric vehicle. The electrical system comprises a vehicle network and an external network having one or more external loads and connectable to an on-board network. The vehicle network comprises a converter unit adapted for connecting a traction voltage network and an on-board network having a battery unit and one or more internal loads and connected to the converter unit; and a switching unit adapted for controlling power output to the external network by connecting and disconnecting the on-board network and external network. The method comprises the steps of determining at least one current information of the electrical system and at least one safety current value; and controlling the switching unit to control the power output from the on-board network to the external network depending on the at least one current information and the at least one safety current value.

Method and a master control unit for controlling an electrical system of an electric vehicle

An electrical fuse maintenance system includes sensor adapted to measure the current flowing through a fuse element, the voltage on the fuse element, the temperature of the fuse element, and/or the temperature of an environment surrounding the fuse element, a controller configured to monitor the current, the voltage, the temperatures over a period of time while the fuse element is connected to an energized electrical power unit. Based on the monitored current, voltage and temperatures, the controller is adapted to estimate a service life remaining of the fuse element.

Method for estimating the ageing state of fuse elements and an electrical fuse maintenance system

A method of operating an electrical system including an electrical power source configured to supply a first DC voltage at a first voltage level and a DC/DC converter coupled to the electrical power source and configured to supply a second DC voltage is provided. The method includes monitoring a level of current supplied by the DC/DC converter, determining, based on monitoring of the level of the current, that the DC/DC converter is saturated, and in response to determining that the DC/DC converter is saturated, regulating a level of voltage outputby the DC/DC converter. Related DC/DC converters and vehicle electrical systems are disclosed.

DC/DC converter overload management in vehicle electrical systems

Provided is a method of operating an electrical system including a first battery, a second battery coupled in series with the first battery, and a battery equalizer coupled to the first battery and the second battery and configured to supply an equalizing current to the first battery. The method includes monitoring a level of the equalizing current, determining, based on monitoring of the level of the equalizing current, that the equalizing current is saturated, and reducing a level of current supplied at a positive terminal of the first battery in response to determining that the equalizing current is saturated. The methods may take an action to reduce the demand for current that is supplied by the first battery.

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Lyons, France

Frederic Leroy