A power supply apparatus includes a battery pack for an electric vehicle, and an interface unit that couples the battery pack and a plurality of electrical devices. The interface unit includes a branch connector provided with a coupling unit and a plurality of fuses. The coupling unit allows coupling wires to join. Each of the coupling wires is coupled to a corresponding one of electrical devices. Each of the plurality of fuses is disposed in a corresponding one of coupling wires. The interface unit also includes a battery pack connector that is able to be coupled to the branch connector. In a state in which the branch connector is coupled to the battery pack connector, the power supply apparatus is configured to be able to supply electric power from the battery pack to each of the plurality of electrical devices via the coupling unit.

A thermal cutoff at least includes a current-carrying fusible element having two ends connected to a first electrode and a second electrode. The current-carrying fusible element is provided in a closed cavity bounded by a housing having an opening at one end, a cover plate, and a sealant. The thermal cutoff further includes a first lead wire and a second lead wire each wrapped by an insulating sheath. One end of the first lead wire and one end of the second lead wire are electrically connected to the first electrode and the second electrode. The sealant is filled in the opening of the housing, covers an electrical joint between the first lead wire and a first electrode plate and an end of the first lead wire, and also covers an electrical joint between a second electrode plate and the second lead wire and an end of the second lead wire.

A seal for securing a cable to a fuse box includes a plastic body and a rubber insert. The plastic body has a receiving cavity along an inner surface. The rubber insert features an outside structure to join with the inner surface of the plastic body, an inside structure to surround the cable, and a fitting rib along an outside surface of the outside structure, the fitting rib to occupy the receiving cavity. The inside structure of the rubber insert moves in response to movement of the cable while the outside structure does not move.

Electrical switching devices, such contactor and fuse devices, are disclosed that have improved reliability particularly through thermal cycling. One electrical switching device according to the present invention comprises an outer housing and internal operational components within the outer housing. An internal housing in included in that outer housing that surrounds at least some of the internal operational components. A sealing material is also included within the outer housing that is capable of forming a hermetic seal within the outer housing, wherein the sealing material contacts the internal housing. The internal housing has a CTE that substantially matches the CTE of the sealing material. Electrical system according to the present invention comprises an electrical circuit and an improved electrical switching device electrically connected to the electrical circuit to reliably open or close the circuit.

A pressure-compensated fuse assembly may include a first chamber housing a first fluid and a plurality of solid particles. Additionally, the fuse assembly may include a second chamber housing a second fluid. Further, the fuse assembly may include a pressure compensator disposed between the first chamber and the second chamber. The pressure compensator may be configured to transfer pressure from the second fluid in the second chamber to the plurality of solid particles in the first chamber.

The subsea fuse assembly includes an enclosure filled with a dielectric fluid and provided with an equalization opening, which is sealed with a flexible element. A first electric conductor extends into the enclosure through a first lead-through positioned in a wall of the enclosure. A second electric conductor is attached to an inner surface of a wall of the enclosure. A fuse is connected between the first electric conductor and the second electric conductor within the enclosure. A third electric conductor extends outside the enclosure and is attached to an outer surface of a wall of the enclosure. An electrically conductive path is thus provided between the second electric conductor and the third electric conductor through the electrically conductive enclosure.

A thermal cutoff at least includes a current-carrying fusible element having two ends connected to a first electrode and a second electrode. The current-carrying fusible element is provided in a closed cavity bounded by a housing having an opening at one end, a cover plate, and a sealant. The thermal cutoff further includes a first lead wire and a second lead wire each wrapped by an insulating sheath. One end of the first lead wire and one end of the second lead wire are electrically connected to the first electrode and the second electrode. The sealant is filled in the opening of the housing, covers an electrical joint between the first lead wire and a first electrode plate and an end of the first lead wire, and also covers an electrical joint between a second electrode plate and the second lead wire and an end of the second lead wire.

Provided are approaches for integrating solenoids and fuses within a compact housing. In one approach, a fuse apparatus (100) may include a housing (102) including a main body (104), a cover (106) coupled to a first side (110) of the main body (104), and a base (112) coupled to a second side (116) of the main body (104), wherein the cover (106) and the main body (104) define a fuse cavity (120), and wherein the base (112) and the main body (104) define a main cavity. (122) The fuse apparatus (100) may further include a plurality of fuses (124) disposed within the fuse cavity (120), and a plurality of solenoids (130) electrically connected to a printed circuit board (PCB) (132), wherein the plurality of fuses (124) is disposed above the PCB (132), and wherein the PCB (132) is positioned within the main cavity (122).

Electrical switching devices, such contactor and fuse devices, are disclosed that have improved reliability particularly through thermal cycling. One electrical switching device according to the present invention comprises an outer housing and internal operational components within the outer housing. An internal housing in included in that outer housing that surrounds at least some of the internal operational components. A sealing material is also included within the outer housing that is capable of forming a hermetic seal within the outer housing, wherein the sealing material contacts the internal housing. The internal housing has a CTE that substantially matches the CTE of the sealing material. Electrical system according to the present invention comprises an electrical circuit and an improved electrical switching device electrically connected to the electrical circuit to reliably open or close the circuit.

Provided are approaches for integrating solenoids and fuses within a compact housing. In one approach, a fuse apparatus (100) may include a housing (102) including a main body (104), a cover (106) coupled to a first side (110) of the main body (104), and a base (112) coupled to a second side (116) of the main body (104), wherein the cover (106) and the main body (104) define a fuse cavity (120), and wherein the base (112) and the main body (104) define a main cavity. (122) The fuse apparatus (100) may further include a plurality of fuses (124) disposed within the fuse cavity (120), and a plurality of solenoids (130) electrically connected to a printed circuit board (PCB) (132), wherein the plurality of fuses (124) is disposed above the PCB (132), and wherein the PCB (132) is positioned within the main cavity (122).