A DC relay for anti-short circuit current and arc extinction including two static contact leading-out ends, a pushing rod assembly, a movable contact piece and three permanent magnets. Two of the three permanent magnets are respectively arranged at two sides of the movable contact piece in a width direction and are adjacent to one of two movable contacts of the movable contact piece; magnetic polarities of two permanent magnets facing the movable contact are the same; the third permanent magnet is arranged on one side of the movable contact piece in a length direction and is adjacent to another movable contact and a polarity face of the third permanent magnet is substantially perpendicular to the polarity faces of the two permanent magnets, so that an Lorentz force generated by the movable contact piece in an arc extinction magnetic field formed by the three permanent magnets is substantially zero.

A DC relay for anti-short circuit current and arc extinction includes a static contact leading-out end; a movable contact piece; a fixed upper yoke and a lower armature respectively placed on an upper side and a lower side of the movable contact piece and can form a magnetic conductive loop; a first U-shaped bracket fixedly installed at an upper end of a pushing rod, the pushing rod can drive the movable contact piece to come into contact and separate from the static contact leading-out end during an up-and-down movement to realize an on-off of the DC relay; and a second U-shaped bracket installed on a stationary component of the DC relay, and the fixed upper yoke is fixedly installed on the second U-shaped bracket.

A DC relay for anti-short circuit current and arc extinction includes a static contact leading-out end; a movable contact piece; a fixed upper yoke and a lower armature respectively placed on an upper side and a lower side of the movable contact piece and can form a magnetic conductive loop; a first U-shaped bracket fixedly installed at an upper end of a pushing rod, the pushing rod can drive the movable contact piece to come into contact and separate from the static contact leading-out end during an up-and-down movement to realize an on-off of the DC relay; and a second U-shaped bracket installed on a stationary component of the DC relay, and the fixed upper yoke is fixedly installed on the second U-shaped bracket.

A relay system includes a relay device and a controller. The relay device includes a contact and a driving mechanism configured to switch the contact between an open mode and a closed mode. The controller is configured to control the relay device. The controller is configured to, when freezing occurs on the contact, to commence first application of electric current to the driving mechanism to generate a driving force acting in a direction in which the contact is not switched between the open mode and a closed mode.

A relay with high action reliability includes a base part and a movable part that is swingable relative to the base part. The movable part includes a movable contact piece, an armature, and a first plastic body, and the movable contact piece and the armature are assembled into an integral piece through the first plastic body. The movable contact piece includes a movable contact body and a soldering lug structure. The soldering lug structure includes a connecting portion and a soldering portion, and the soldering portion is connected to the movable contact body through the connecting portion. The soldering portion includes a first soldering structure and a second soldering structure that are soldered to the base part; and the first soldering structure and the second soldering structure are at a same side of the connecting portion in a length direction of the armature.

A relay with high action reliability includes a base part and a movable part that is swingable relative to the base part. The movable part includes a movable contact piece, an armature, and a first plastic body, and the movable contact piece and the armature are assembled into an integral piece through the first plastic body. The movable contact piece includes a movable contact body and a soldering lug structure. The soldering lug structure includes a connecting portion and a soldering portion, and the soldering portion is connected to the movable contact body through the connecting portion. The soldering portion includes a first soldering structure and a second soldering structure that are soldered to the base part; and the first soldering structure and the second soldering structure are at a same side of the connecting portion in a length direction of the armature.