A relay is provided with a housing, a coil arranged inside the housing, a fixed terminal, and a movable member. The housing is filled with an insulating liquid refrigerant, and the coil and the movable member are immersed in the liquid refrigerant, and at least a fixed contact of the fixed terminal is immersed in the liquid refrigerant. Heat generated in the coil, the movable member, and the fixed terminal is cooled by the liquid refrigerant, and thus the efficiency of cooling the relay is improved.

A power relay assembly is provided. A power relay assembly according to an exemplary embodiment of the present invention comprises: a support plate having at least one electric element mounted on one surface thereof and including a plastic material having heat dissipation and insulation properties; and at least one bus bar electrically connected to the electric element and partially embedded in the support plate. Due to these features, since heat generated from the bus bar and the electric element is dissipated to the outside through the support plate, it is possible to prevent performance deterioration due to heat and breakage of electronic components.

A power relay assembly is provided. A power relay assembly according to an exemplary embodiment of the present invention comprises: an upper case having at least one electric element mounted on one surface thereof; a lower case coupled to the upper case; and at least one bus bar electrically connected to the electric element, disposed between the upper case and the lower case, and including a bottom portion that is in surface contact with at least one of the upper case and the lower case, wherein at least one side of the bottom portion contacts a portion made of a plastic material having heat dissipation and insulation properties in the upper case and the lower case.

An electronic control device includes a relay including a relay case and an electromagnet and a contact part. The relay case is structured to contain the electromagnet and the contact part. The contact part is structured to be opened and closed by action of the electromagnet. A connector terminal is electrically connected to the relay. A circuit board is structured to mount the relay and the connector terminal thereon. An exterior shell is structured to contain the circuit board such that the connector terminal is exposed outside the exterior shell. A thermal mass element is disposed in a wiring route between the relay and the connector terminal.

An electronic control device includes a relay including a relay case and an electromagnet and a contact part. The relay case is structured to contain the electromagnet and the contact part. The contact part is structured to be opened and closed by action of the electromagnet. A connector terminal is electrically connected to the relay. A circuit board is structured to mount the relay and the connector terminal thereon. An exterior shell is structured to contain the circuit board such that the connector terminal is exposed outside the exterior shell. A thermal mass element is disposed in a wiring route between the relay and the connector terminal.

A relay device includes a first contact, a second contact, a first conductor, a second conductor, a housing, and a heat transfer member. The first contact and the second contact are switchable between a state of being close to each other and a state of being separated from each other. The first contact is electrically coupled at the first conductor. the second contact is electrically coupled at the second conductor. The housing accommodates the first contact, the second contact, the first conductor, and the second conductor. The heat transfer member is higher in thermal conductivity than the housing. The heat transfer member extends from outside the housing to inside the housing and is in contact with one or both of the first conductor and the second conductor.

A relay device includes a first contact, a second contact, a first conductor, a second conductor, a housing, and a heat transfer member. The first contact and the second contact are switchable between a state of being close to each other and a state of being separated from each other. The first contact is electrically coupled at the first conductor. the second contact is electrically coupled at the second conductor. The housing accommodates the first contact, the second contact, the first conductor, and the second conductor. The heat transfer member is higher in thermal conductivity than the housing. The heat transfer member extends from outside the housing to inside the housing and is in contact with one or both of the first conductor and the second conductor.

A relay includes a housing, an electric contact system in the housing, an electromagnetic system in the housing, and a magnetic blowing arc-extinguish device. The electric contact system includes a static contact with a static contact portion and a movable contact with a movable contact portion. The electromagnetic system is configured to drive the movable contact to move between a closed position in which the movable contact is in electrical contact with the static contact and an opened position in which the movable contact is separated from the static contact. The magnetic blowing arc-extinguish device includes a permanent magnet statically provided near the static contact and configured to lengthen an electric arc between the static contact portion and the movable contact portion by an electromagnetic force to extinguish the electric arc.

A relay includes a housing, an electric contact system in the housing, an electromagnetic system in the housing, and a magnetic blowing arc-extinguish device. The electric contact system includes a static contact with a static contact portion and a movable contact with a movable contact portion. The electromagnetic system is configured to drive the movable contact to move between a closed position in which the movable contact is in electrical contact with the static contact and an opened position in which the movable contact is separated from the static contact. The magnetic blowing arc-extinguish device includes a permanent magnet statically provided near the static contact and configured to lengthen an electric arc between the static contact portion and the movable contact portion by an electromagnetic force to extinguish the electric arc.

An electrical assembly may include a bus bar assembly, a sensor assembly, including a circuit board connected to the bus bar assembly, and a sensor, a bracket connected to the bus bar assembly, and a cooling member connected to the bracket. A method of assembling an electrical assembly may include connecting a shunt resistor with a bus bar assembly, connecting a circuit board with the bus bar assembly, connecting the bus bar assembly with the bracket, disposing the cooling member on or about the bracket, and/or connecting the cooling member with the bracket.