Abstract: A method of controlling an energy storage system in a vehicle, the energy storage system comprising a fuel cell energy conversion device and a junction box configured to connect the fuel cell energy conversion device to one of a bi-directional charging port and an electrical propulsion system. The method comprises determining a change in a vehicle operational status from a driving mode to a standstill mode; estimating a standstill duration; and based on a known relation between fuel cell degradation and fuel cell shut down duration for the fuel cell energy conversion device, determining if the fuel cell energy conversion device is to be active or shut down during the standstill.

Abstract: Systems and methods for controlling operation of a fuel cell system in a vehicle are provided. Pressures at one or more of an anode side, a cathode side, and a coolant subsystem are controlled to be maintained within a pressure corridor during a normal operation of the fuel cell system. At an emergency shutdown, pressure at an anode side is controlled. A method of controlling operation of a fuel cell system includes detecting a shutdown of the fuel cell system, determining whether the shutdown is an emergency shutdown, and, responsive to determination that the shutdown is the emergency shutdown, controlling a degree of opening of an anode purge valve, positioned at an anode outlet path extending between an anode outlet and a cathode outlet path, based on availability of pressure sensor data and/or a power level at which the fuel cell system was operating at a time when the emergency shutdown was detected.

Abstract: A cooling system for cooling of a fuel cell assembly, includes a cooling loop for recirculation of a cooling medium, a cooling medium flow line comprising a first cooling medium buffer tank, a first heat exchanger for cooling of the cooling medium, and a second cooling medium buffer tank. The first cooling medium buffer tank is arranged upstream the first heat exchanger so as to allow collection, storing and discharge of cooling medium before it reaches the first heat exchanger. The second cooling medium buffer tank is arranged downstream of the first heat exchanger so as to allow collection, storing and discharge of cooling medium that has passed through and been cooled in the first heat exchanger.

Abstract: System for supplying compressed air to a fuel cell of a vehicle, comprising a first compressor having an inlet for receiving air and an outlet for delivering compressed air to the fuel cell; an air storage tank arranged upstream and in series with the first compressor and configured to store compressed air of high pressure; an air selection control assembly comprising a selection valve and a switch actuator configured to operate the selection valve, wherein said selection valve is arranged in between air storage tank and inlet of the first compressor, and further in fluid communication with an inlet conduit for receiving fresh air, said switch actuator being configured to operate the selection valve to selectively control flow of air to the first compressor such that air can be supplied from the air storage tank to the first compressor or from the fresh air inlet conduit to the first compressor.

Abstract: A system for a vehicle comprising at least a first fuel cell system and a second fuel cell system, the first fuel cell system having a compressor disposed in a cathode side of the first fuel cell system; wherein the first fuel cell system further comprises a controllable flow control valve configured to direct compressed air; the second fuel cell system and a corresponding compressor disposed in a cathode side of the second fuel cell system; wherein the second fuel cell system further comprises a corresponding controllable flow control valve configured to direct compressed air.

Abstract: An electric machine drive arrangement for a heavy-duty vehicle. The electric machine drive arrangement comprises a motor drive system inverter with an alternating current side for interfacing with an electric machine. The electric machine drive arrangement comprises a brake arrangement comprising a braking resistor circuit connectable to a control circuit. The electric machine drive arrangement comprises a rectifier arrangement connected in parallel between the brake arrangement and the motor drive system inverter on the alternating current side of the motor drive system inverter.

Abstract: An energy storage tank defining a tank volume for heat transfer fluid and comprising a partition dividing the tank volume into a first volume and a second volume, wherein the partition is movable to/from any position between a minimum energy storage position corresponding to a minimum second volume, and a maximum energy storage position corresponding to a maximum second volume, the energy storage tank further comprising a biasing device being arranged such that movement of the partition away from the minimum energy storage position corresponds to storing energy in the biasing device, and movement towards the minimum energy storage position corresponds to releasing energy from the biasing device.

Abstract: A heat transfer fluid system for a vehicle comprising an electric energy supply system such as a fuel cell system and/or a battery system, the heat transfer fluid system comprising a heat transfer fluid circuit arranged for controlling the temperature of the electric energy supply system by means of a heat transfer fluid, and a heat transfer fluid storage tank defining a tank volume for the heat transfer fluid, the heat transfer fluid storage tank comprising a partition dividing the tank volume into a first volume and a second volume, and a biasing device, wherein the partition is movable to/from any position between a minimum heat storage position corresponding to a minimum second volume, and a maximum heat storage position corresponding to a maximum second volume, and the heat transfer fluid system further comprising a valve assembly comprising one or more valves.

Abstract: A cooling system includes a fluid circuit and a cooler arranged in fluid communication with said fluid circuit. The cooler regulates the temperature of said coolant. The fluid circuit comprises a first coolant fluid branch for circulating coolant to regulate a temperature of a low temperature component and a second coolant fluid branch for circulating coolant to regulate a temperature of a high temperature component. A first pump unit is arranged in said first coolant fluid branch. A coolant temperature control system is disposed in said first coolant fluid branch and regulates a temperature of the coolant to the low temperature component on the basis of a temperature difference between a coolant temperature upstream the coolant temperature control system and a temperature required at an inlet of the low temperature component.

Abstract: System for supplying compressed air to a fuel cell of a vehicle, comprising a first compressor having an inlet for receiving air and an outlet for delivering compressed air to the fuel cell; an air storage tank arranged upstream and in series with the first compressor and configured to store compressed air of high pressure; an air selection control assembly comprising a selection valve and a switch actuator configured to operate the selection valve, wherein said selection valve is arranged in between air storage tank and inlet of the first compressor, and further in fluid communication with an inlet conduit for receiving fresh air, said switch actuator being configured to operate the selection valve to selectively control flow of air to the first compressor such that air can be supplied from the air storage tank to the first compressor or from the fresh air inlet conduit to the first compressor.