A control unit includes: an input portion that receives the positional information of a vehicle; a calculation unit that generates a control signal for controlling an electromagnetic relay; and an output portion that outputs the control signal to the electromagnetic relay. The calculation unit determines whether a location region of the electromagnetic relay is a relay-freeze region, the location region being identified by the positional information of the vehicle, and, when the location region of the electromagnetic relay is a relay-freeze region, performs a freeze inhibiting process for preventing the electromagnetic relay from being frozen or defrosting the electromagnetic relay by opening and closing the electromagnetic relay and causing the electromagnetic relay to vibrate.

A relay device includes an electronic block configured to selectively generate an electromagnetic force by means of a coil; two fixed contact point terminals at which fixed contact points are respectively installed; a movable contact point assembly having a movable contact point installed at a front end thereof, the movable contact point being fluctuated by the electromagnetic force to be contacted with or separated from the fixed contact points; and a base block configured to hold the electronic block, the fixed contact point terminals and the movable contact point assembly, which are accommodated in a cover. An entire space inside the cover is divided into two regions based on a contact surface between the fixed contact point and the fixed contact point terminal.

A relay device includes an electronic block configured to selectively generate an electromagnetic force by means of a coil; two fixed contact point terminals at which fixed contact points are respectively installed; a movable contact point assembly having a movable contact point installed at a front end thereof, the movable contact point being fluctuated by the electromagnetic force to be contacted with or separated from the fixed contact points; and a base block configured to hold the electronic block, the fixed contact point terminals and the movable contact point assembly, which are accommodated in a cover. An entire space inside the cover is divided into two regions based on a contact surface between the fixed contact point and the fixed contact point terminal.

Provided is an electronic module including a housing case for housing a relay, a heat transfer sheet placed on one wall portion of the housing case, a bus bar that is connected to the relay and is partially in contact with the heat transfer sheet, and a pressing portion that presses the bus bar against the heat transfer sheet.

Provided is an electronic module including a housing case for housing a relay, a heat transfer sheet placed on one wall portion of the housing case, a bus bar that is connected to the relay and is partially in contact with the heat transfer sheet, and a pressing portion that presses the bus bar against the heat transfer sheet.

Provided is a power relay assembly. The power relay assembly comprises: a support plate having at least one electrical element mounted on one surface thereof and including a plastic material having a heat dissipation property and insulation property; at least one bus bar electrically connected to the electrical element; and an electromagnetic wave shielding unit for shielding electromagnetic waves generated from the electrical element.

Provided is a power relay assembly. The power relay assembly comprises: a support plate having at least one electrical element mounted on one surface thereof and including a plastic material having a heat dissipation property and insulation property; at least one bus bar electrically connected to the electrical element; and an electromagnetic wave shielding unit for shielding electromagnetic waves generated from the electrical element.

Provided is a circuit structure having a novel structure that allows heat from a heat-generating component to be dissipated more efficiently. A circuit structure includes: a heat-generating component that generates heat when energized; energization bus bars that are connected to connection portions of the heat-generating component; cooling members that are formed separately from the energization bus bars, and are connected to the connection portions of the heat-generating component along with energization bus bars, and the heat-transfer portions that are provided in the cooling members, and are in heat-conductive contact with a heat-dissipating body.

An electromagnetic relay includes a case including a base, a first fixed terminal held by the base, a movable contact piece, a gas inflow space, and a gas passage. The first fixed terminal includes a first fixed contact disposed apart from the base in a first direction inside the case, a contact support portion disposed between the first fixed contact and the base and configured to support the first fixed contact, and a first extending portion extending at an angle from the contact support portion and penetrating the base in the first direction. The movable contact piece includes a first movable contact facing the first fixed contact in the first direction. The gas inflow space is formed between the base and the contact support portion inside the case. The gas passage penetrates the base in the first direction and communicates the gas inflow space with an outside of the case.

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.