Provided is a switch that can be downsized. A switch is provided with a plunger, and an upper torsion spring configured to bias the plunger in a returning direction. The torsion spring has a first arm that extends to the plunger and abuts against the plunger. The plunger has a hole at a position into which the first arm is inserted. The hole is a through hole extending in a direction that is perpendicular to a direction in which the plunger moves, and is the same as a direction in which the first arm extends when viewed in the direction in which the plunger moves.

Provided is a switch that can reliably bring contacts into contact with each other with a small load, and can be prevented from malfunctioning. A switch is provided with a plunger, a lower torsion spring in which a biasing direction changes according to the movement of the plunger. The lower torsion spring biases the plunger in an opposite direction to a returning direction when the plunger is in the operation position, and biases the plunger in a direction different from the opposite direction to the returning direction when the plunger is in the reference position.

A relay, includes a base; a contact part disposed on the base and including two sets of movable contact parts, each set of the movable contact parts including a movable contact piece, a movable contact unit and a static contact unit, stiffnesses of two movable contact pieces are difference; a push rod assembly including a first push rod and a second push rod respectively connected to the two movable contact pieces; and a magnetic circuit part arranged on the base for driving the movements of the first push rod and the second push rod in an opposite directions, so as to drive the two movable contact pieces to come into contact or move away from each other, achieving contact or separation between the static contact unit and the movable contact unit.

A relay includes a contact part including two sets of movable contact parts, each set including a movable contact piece, a movable contact unit, a static contact unit and a movable contact leading-out piece, at least one movable contact leading-out pieces is provided with an avoidance notch; the static contact unit having the avoidance notch including at least two static contacts; and a push rod assembly including a first and second push rods, the first push rod being movably passing through the avoidance notch of one of the movable contact leading-out pieces and connected with the movable contact piece of the other the movable contact part; the second push rod being connected with the movable contact piece of the movable contact part.

A contact piece structure includes two movable contact pieces arranged side by side. Each movable contact piece includes a piece body, a movable contact and a static contact located at opposite ends of the piece body. The movable contact and the static contact of one of the movable contact pieces correspond to the static contact and the movable contact of the other movable contact piece respectively so as to form a parallel circuit structure when the contacts being in contact; Bending portions of two piece bodies are arranged one-to-one to form a bending pair; in each of the bending pairs, top ends of two bending portions are parallel with each other; two bending portions protrude along a same protruding direction, a first distance between the two bending portions is smaller than a second distance between the two ends of two piece bodies.

The present invention relates to a contactor device (100), which is capable of changing a connection state of at least two battery modules (502(1), 502(2)) of a high voltage energy storage system (10) between a series connection and a parallel connection, and to an energy storage system (10) comprising the contactor device (100). The contactor device (100) comprises two first terminals (102, 104) for electrically connecting at least one of a load and a charger, two second terminals (106, 108) for electrically connecting a first battery module (502(1)), and two third terminals (110, 112) for electrically connecting a second battery module (502(2)). The contactor device (100) further comprises two first bus bars (128, 129), which each are electrically connected to one of the first terminals (102, 104), and two second bus bars (138, 139; 238, 239), wherein one of the second bus bars (138; 238) is electrically connected to one of the second terminals (106), and the other one of the second bus bars (139; 239) is electrically connected to one of the third terminals (112), and a connection bus bar (144), which is electrically isolated from the two first bus bars (128, 129). At least one actuation element is configured to change a state of the contactor device (100) at least to and from a series connection state, in which the two second bus bars (138, 139; 238, 239) are conductively coupled to the connection bus bar (144), and to and from a parallel connection state, in which one of the second bus bars (138; 238) is conductively coupled to one of the first bus bars (128) and the other one of the second bus bars (139; 239) is conductively coupled to the other one of the first bus bars (129).

A fusible disconnect switch devices includes dual sets of switch contacts to connect or disconnect a current path through an overcurrent protection fuse with reduced arcing severity. Faster acting and longer contact path switch mechanisms are described providing satisfactory switching of DC circuits without excessive electrical arcing in a reduced physical package size.

An electromechanical circuit breaker comprising a main contact pair comprising a first main contact disposed on a first main contact bridge; an auxiliary contact pair comprising a first auxiliary contact disposed on a first auxiliary contact bridge, the first auxiliary contact bridge being connected in parallel to the first main contact bridge and wherein the auxiliary contact pair comprises a material that has a higher melting point than a material of the main contact pair; a first armature configured to move the first main contact bridge; a second armature configured to move the first auxiliary contact bridge, wherein the first and second armatures are configured such that the auxiliary contact pair opens after the main contact pair opens, and the auxiliary contact pair closes before the main contact pair closes.

A switch is provided. The switch includes, but not limited to: normally open (NO) terminals; normally closed (NC) terminals; an actuator, configured to conduct at least one of the NO terminals and the NC terminals; an indicator for a remaining service life of the switch; and a controller component, configured to: determine the remaining service life of the switch based on a conduct resistance between at least one of the NO terminals and the NC terminals, and control the indicator to illuminate a corresponding color based on the determined remaining service life of the switch.

Provided is a switch that can be downsized. A switch is provided with a plunger, two upper torsion springs that bias the plunger in a returning direction, housing-side contacts, and plunger-side contacts. One of the upper torsion springs is arranged on one side of a plane that includes an axis passing through a central portion of the plunger, and that is perpendicular to perpendicular lines M connecting the plunger-side contacts and the axis, and the other one of the upper torsion springs is arranged on the other side of the plane.