A method and a system for heat preservation of a battery of a vehicle, and a storage medium is provided. The method includes: detecting, in response to completing the charging of the vehicle, whether a current temperature of the battery of the vehicle is lower than a preset temperature threshold value of the battery, and the temperature threshold value is configured as a lowest temperature value at which the battery is able to maintain normal performance; and controlling, when a detection result is yes, the vehicle to obtain an electrical energy from an external charging device to heat the battery, such that the battery is heated above the temperature threshold value to complete heat preservation of the battery. The method provided by the present application can heat the battery without consuming the power of the battery used for endurance mileage of the vehicle when the battery is charged.

An aircraft has an aircraft propulsor and/or an aircraft propulsor drive. The aircraft propulsor and/or an aircraft propulsor drive acts as a waste heat source. The aircraft has a metal-air fuel cell. The aircraft has a waste heat transfer system configured to thermally couple the metal-air fuel cell and a waste heat source. The aircraft includes a control system configured to operate the waste heat transfer system to selectively transfer waste heat from the waste heat source to the metal-air fuel cell.

The invention concerns a vehicle comprising an electricity production unit configured for generating an electrical current, a transformer unit and a fuel storage unit, the production unit comprising at least two fuel cell stacks and a single first electrical connection interface for transmitting the electrical current to the transformer unit. The production unit further comprises a single cooling circuit, an air supply circuit and a single gaseous hydrogen supply circuit for supplying gaseous hydrogen, from the fuel storage unit, to each fuel cell stack. The production unit is separate from the fuel storage unit and connected to the fuel storage unit by a single connection interface, the production unit being removable from the vehicle as an integrated unit independently from the fuel storage unit.

The invention concerns a vehicle comprising an electricity production unit configured for generating an electrical current, a transformer unit and a fuel storage unit, the production unit comprising at least two fuel cell stacks and a single first electrical connection interface for transmitting the electrical current to the transformer unit. The production unit further comprises a single cooling circuit, an air supply circuit and a single gaseous hydrogen supply circuit for supplying gaseous hydrogen, from the fuel storage unit, to each fuel cell stack. The production unit is separate from the fuel storage unit and connected to the fuel storage unit by a single connection interface, the production unit being removable from the vehicle as an integrated unit independently from the fuel storage unit.

A thermal management system for a fuel cell vehicle is provided. The thermal management system includes a fuel cell stack, a heater configured to use power generated by the fuel cell stack, a radiator configured to cool a coolant, a pump configured to circulate the coolant, and a valve configured to control a temperature of the coolant by adjusting a flow rate of the coolant supplied to the pump from at least one of the fuel cell stack, the heater, or the radiator.

A propulsion system including: a fuel cell assembly having a fuel cell defining an outlet positioned to remove output products from the fuel cell and a fuel cell assembly operating condition; a turbomachine comprising a compressor section, a combustion section, and a turbine section arranged in serial flow order, the combustion section configured to receive a flow of aviation fuel from an aircraft fuel supply and further configured to receive the output products from the fuel cell; and a controller comprising memory and one or more processors, the memory storing instructions that when executed by the one or more processors cause the propulsion system to perform operations including receiving data indicative of a mid-flight flameout within the combustion section; modifying the fuel cell assembly operating condition in response to receiving data indicative of the mid-flight flameout within the combustion section; and initiating a relight of the combustion section.

A propulsion system including: a fuel cell assembly having a fuel cell defining an outlet positioned to remove output products from the fuel cell and a fuel cell assembly operating condition; a turbomachine comprising a compressor section, a combustion section, and a turbine section arranged in serial flow order, the combustion section configured to receive a flow of aviation fuel from an aircraft fuel supply and further configured to receive the output products from the fuel cell; and a controller comprising memory and one or more processors, the memory storing instructions that when executed by the one or more processors cause the propulsion system to perform operations including receiving data indicative of a mid-flight flameout within the combustion section; modifying the fuel cell assembly operating condition in response to receiving data indicative of the mid-flight flameout within the combustion section; and initiating a relight of the combustion section.

A fuel cell system includes a fuel cell unit configured to generate an amount of electrical power for supply to a varying electrical load and a fuel cell controller configured to receive a first indication that the varying electrical load is at a local maximum within a predetermined period, and, in response, operate the fuel cell unit with an operational parameter having a first value such that the fuel cell unit produces a limited maximum amount of electrical power that is a predetermined percentage of a maximum rated power output of the fuel cell unit. The fuel cell controller is also configured to receive an indication that the varying electrical load has reduced, and, in response, operate the fuel cell unit with the operational parameter having a second value such that the fuel cell unit produces an amount of electrical power below the limited maximum amount of electrical power.

Provided is a warm-up apparatus for a fuel cell for an electrically driven vehicle in which a fuel cell and a secondary battery are mounted as power sources of a motor for travelling, and which, when charging of the secondary battery is required, stops operation of the fuel cell and charges the secondary battery with electric power from an external power source by means of a battery charger. The warm-up apparatus includes: a secondary battery cooling circuit that cools the secondary battery; a fuel cell cooling circuit that cools the fuel cell; a connection passage that connects the secondary battery cooling circuit and the fuel cell cooling circuit through a switching valve; and a warm-up control unit that, during charging of the secondary battery, controls the switching valve so that the secondary battery cooling circuit and the fuel cell cooling circuit communicate through the connection passage.

A fuel cell vehicle includes a fuel cell, a first electric component, a second electric component, a battery, a first switch, a second switch, and circuitry. The first electric component is to operate the fuel cell. The second electric component is not to be used to operate the fuel cell. The first switch is to electrically connect the first electric component to the battery to supply electric power from the battery to the first electric component. The second switch is to electrically connect the second electric component to the battery to supply electric power from the battery to the second electric component. The circuitry is configured to control the first switch to electrically connect the first electric component to the battery and to control the second switch not to electrically connect the second electric component to the battery when the fuel cell is started.