The invention relates to charging an electrical energy store by means of a converter. In this case the converter monitors an electrical connection between the converter and the electrical energy store. If an interruption of the electrical connection between the converter and the electrical energy store is detected, for example, the opening of a circuit breaker between the electrical energy store and the converter, the further provision of electrical power for charging the electrical energy store through is immediately prevented by the converter. In this way, dangerous voltage rises on the converter can be avoided.

A silicon carbide semiconductor device includes an n-type silicon carbide semiconductor substrate, a drain electrode electrically connected to a rear face, an n-type semiconductor layer having a second impurity concentration lower than the first impurity concentration, a p-type first semiconductor region, an n-type second semiconductor region, and an n-type third semiconductor region. A trench is formed having a gate electrode therein in which the bottom face of the trench contacts the p-type semiconductor region. A metal layer is electrically connected to the third semiconductor region, and a source electrode electrically connects the second semiconductor region and the metal layer to each other.

An extended-range fuel cell electric vehicle power device includes a driving motor, a bidirectional converter, a chopper, a power cell, a fuel cell, a high-pressure hydrogen storage tank, an electric control valve, a controller, an accelerator pedal and a brake pedal. An output of the driving motor is connected to a transmission shaft of an electric vehicle through a speed change gearbox, and an input of the driving motor is connected to an alternating current output end of the bidirectional converter; a direct current input end of the bidirectional converter is connected in parallel to an output of the power cell and an output of the chopper, and an input of the chopper is connected to a power source output of the fuel cell.

Provided herein are a heat sink module of an inverter module to power an electric vehicle. The heats sink module can include a heat sink body having a plurality of mounting holes, a fluid inlet and a fluid outlet. The heats sink module can include a cooling channel that can be fluidly coupled with the fluid inlet and the fluid outlet. The heats sink module can include an insulator plate having a first surface and a second surface. The second surface of the insulator plate can couple with a joining surface of the heat sink body to seal the cooling channel. The heats sink module can include a heat sink lid disposed over the insulator plate. The heat sink lid can have a plurality of mounting feet to couple with the mounting holes of the heat sink body to secure the heat sink lid to the heat sink body.

A power converter module includes an active metal braze (AMB) substrate, power converter circuitry, and a housing. The AMB substrate includes an aluminum nitride base layer, a first conductive layer on a first surface of the aluminum nitride base layer, and a second conductive layer on a second surface of the aluminum nitride base layer opposite the first surface. The power converter circuitry includes a number of silicon carbide switching components coupled to one another via the first conductive layer. The housing is over the power converter circuitry and the AMB substrate. By using an AMB substrate with an aluminum nitride base layer, the thermal dissipation characteristics of the power converter module may be substantially improved while maintaining the structural integrity of the power converter module.

A power supply system includes a high voltage circuit; a system ECU that controls the high voltage circuit; and a backup power supply unit that supplies electric power in the high voltage circuit to the system ECU. The system ECU includes a discharge controller that performs discharge control to discharge the electric charges in a smoothing capacitor until a secondary-side voltage is reduced to a discharge termination determination voltage or lower; and a vehicle state monitor that determines whether a vehicle is in a stopped state, and determines whether the secondary-side voltage is lower than or equal to a re-rise determination voltage in a monitoring period from termination of the discharge control until the vehicle is determined to be in the stopped state. When the secondary-side voltage is determined to be higher than the re-rise determination voltage by the vehicle state monitor, the discharge controller performs the discharge control again.

A power converter module includes an active metal braze (AMB) substrate, power converter circuitry, and a housing. The AMB substrate includes an aluminum nitride base layer, a first conductive layer on a first surface of the aluminum nitride base layer, and a second conductive layer on a second surface of the aluminum nitride base layer opposite the first surface. The power converter circuitry includes a number of silicon carbide switching components coupled to one another via the first conductive layer. The housing is over the power converter circuitry and the AMB substrate. By using an AMB substrate with an aluminum nitride base layer, the thermal dissipation characteristics of the power converter module may be substantially improved while maintaining the structural integrity of the power converter module.

A power converter module includes an active metal braze (AMB) substrate, power converter circuitry, and a housing. The AMB substrate includes an aluminum nitride base layer, a first conductive layer on a first surface of the aluminum nitride base layer, and a second conductive layer on a second surface of the aluminum nitride base layer opposite the first surface. The power converter circuitry includes a number of silicon carbide switching components coupled to one another via the first conductive layer. The housing is over the power converter circuitry and the AMB substrate. By using an AMB substrate with an aluminum nitride base layer, the thermal dissipation characteristics of the power converter module may be substantially improved while maintaining the structural integrity of the power converter module.

Provided herein are a heat sink module of an inverter module to power an electric vehicle. The heats sink module can include a heat sink body having a plurality of mounting holes, a fluid inlet and a fluid outlet. The heats sink module can include a cooling channel that can be fluidly coupled with the fluid inlet and the fluid outlet. The heats sink module can include an insulator plate having a first surface and a second surface. The second surface of the insulator plate can couple with a joining surface of the heat sink body to seal the cooling channel. The heats sink module can include a heat sink lid disposed over the insulator plate. The heat sink lid can have a plurality of mounting feet to couple with the mounting holes of the heat sink body to secure the heat sink lid to the heat sink body.

Provided herein are a heat sink module of an inverter module to power an electric vehicle. The heats sink module can include a heat sink body having a plurality of mounting holes, a fluid inlet and a fluid outlet. The heats sink module can include a cooling channel that can be fluidly coupled with the fluid inlet and the fluid outlet. The heats sink module can include an insulator plate having a first surface and a second surface. The second surface of the insulator plate can couple with a joining surface of the heat sink body to seal the cooling channel. The heats sink module can include a heat sink lid disposed over the insulator plate. The heat sink lid can have a plurality of mounting feet to couple with the mounting holes of the heat sink body to secure the heat sink lid to the heat sink body.