Provided is a relay switch device including a relay housing, a first upper fixing terminal and a second upper fixing terminal arranged side by side over an inside and an outside of the relay housing, a first lower fixing terminal electrically connected to the first upper fixing terminal and arranged under the first upper fixing terminal to be apart a predetermined distance from the first upper fixing terminal, and a second lower fixing terminal electrically connected to the second upper fixing terminal and arranged under the second upper fixing terminal to be apart a predetermined distance from the second upper fixing terminal, and a circuit mode switch module provided to selectively contact the first and second upper fixing terminals or the first and second lower fixing terminals by moving a predetermined distance.

A first busbar includes a first electrical connection portion that is electrically connected to a main relay, a first heat transfer connection portion that is thermally connected to the insulating plate, and a first detour portion that connects the first electrical connection portion and the first heat transfer connection portion to each other. A second busbar includes a second electrical connection portion that is electrically connected to the main relay, a second heat transfer connection portion that is thermally connected to the insulating plate, and a lateral detour portion and a lower detour portion that connect the second electrical connection portion and the second heat transfer connection portion to each other.

An electrical assembly may include a contactor, a bus bar connected to the contactor, a bracket connected to the bus bar, and/or a cooling member. The cooling member may be connected to the bracket such that the contactor is indirectly connected to the cooling member via the bus bar and the bracket. A method of assembling an electrical assembly may include providing a bracket and one or more contactors, inserting the one or more contactors into the bracket, disposing a flexible circuit at least partially on and/or in the bracket, electrically connecting the flexible circuit with the one or more contactors, connecting a bus bar assembly with the one or more contactors, connecting the bus bar assembly with the bracket, disposing a cooling member on or about the bracket, and/or connecting the cooling member with the bracket.

An electrical assembly may include a contactor, a bus bar connected to the contactor, a bracket connected to the bus bar, and/or a cooling member. The cooling member may be connected to the bracket such that the contactor is indirectly connected to the cooling member via the bus bar and the bracket. A method of assembling an electrical assembly may include providing a bracket and one or more contactors, inserting the one or more contactors into the bracket, disposing a flexible circuit at least partially on and/or in the bracket, electrically connecting the flexible circuit with the one or more contactors, connecting a bus bar assembly with the one or more contactors, connecting the bus bar assembly with the bracket, disposing a cooling member on or about the bracket, and/or connecting the cooling member with the bracket.

A multi-port power converter includes a housing that includes a plurality of ports structured to electrically interface to a plurality of loads, the plurality of loads having distinct electrical characteristics. The multi-port power converter also includes a plurality of solid state components configured to provide selected electrical power outputs and to accept selected electrical power inputs and a plurality of solid state switches configured to provide selected connectivity between the plurality of solid state components and the plurality of ports.

A system (100) for controlling temperature of a persistent current switch (120) operating in a background magnetic field includes a heat exchanger (138), a loop tube (135), a ball valve (245) and multiple electromagnets (251, 252). The heat exchanger disperses heat to a cryocooler (106). The loop tube enables flow of coolant to convectively transfer thermal energy generated by the persistent current switch to the heat exchanger. The ball valve is integrated with the loop tube between the persistent current switch and the heat exchanger, and contains a ferromagnetic ball (250). The electromagnets are positioned outside the loop tube adjacent to the ball valve, where energizing a first electromagnet of the multiple electromagnets magnetically moves the ferromagnetic ball to a first position opening the loop tube and enabling the flow of the coolant, and energizing a second electromagnets magnetically moves the ferromagnetic ball to a second position closing the loop tube and blocking the flow of the coolant.

A system (100) for controlling temperature of a persistent current switch (120) operating in a background magnetic field includes a heat exchanger (138), a loop tube (135), a ball valve (245) and multiple electromagnets (251, 252). The heat exchanger disperses heat to a cryocooler (106). The loop tube enables flow of coolant to convectively transfer thermal energy generated by the persistent current switch to the heat exchanger. The ball valve is integrated with the loop tube between the persistent current switch and the heat exchanger, and contains a ferromagnetic ball (250). The electromagnets are positioned outside the loop tube adjacent to the ball valve, where energizing a first electromagnet of the multiple electromagnets magnetically moves the ferromagnetic ball to a first position opening the loop tube and enabling the flow of the coolant, and energizing a second electromagnets magnetically moves the ferromagnetic ball to a second position closing the loop tube and blocking the flow of the coolant.

A relay arrangement includes at least two series-connected relays, which are mechanically and electrically connected to a main printed circuit board via first terminals and second terminals, and at least one flat conductor for conducting current between the at least two series connected relays. The flat conductor is mechanically connected to the main printed circuit board and electrically and thermally connected to the first terminals of the relays, and the at least one flat conductor is configured to dissipate heat produced during operation of the relays.

A power distribution device comprises a system main relay, i.e., SMR, a pre-charge circuit and a control board. The SMR selects between on and off of a current between a power conversion device and a battery. The pre-charge circuit includes a charge resistor and a charge switch which are provided to charge the smoothing capacitor with power supplied from the battery. The control board enables a current smaller than a current flowing through the SMR. The SMR and the control board are arranged in the x-direction via the pre-charge circuit.

A power distribution device comprises a system main relay, i.e., SMR, a pre-charge circuit and a control board. The SMR selects between on and off of a current between a power conversion device and a battery. The pre-charge circuit includes a charge resistor and a charge switch which are provided to charge the smoothing capacitor with power supplied from the battery. The control board enables a current smaller than a current flowing through the SMR. The SMR and the control board are arranged in the x-direction via the pre-charge circuit.