The arrangement for disconnecting at least one of a plurality of battery modules in an automotive battery comprises a device arranged to detect that at least one battery module is to be disconnected, and a bypass switch arranged at each battery module, wherein the bypass switch arranged at the detected at least one battery module is controllable to bypass the at least one detected battery module via a bypass path. The arrangement further comprises a disconnect switch arranged at each battery module, wherein the disconnect switch arranged at the at least one bypassed battery module is controllable to disconnect the at least one detected battery module from remaining battery modules, either simultaneously as, or after, the bypassing of the detected battery module.

A lamp and an operating method for a lamp with an LED element 22 are described. An electrical circuit with the LED element 22 is covered by a cover member 12. A separation device 28 is provided to mechanically severe the electrical conductor 16a, 16b arrange to supply electrical power to the LED element 22 if the detector element 24 detects a defect of the cover member 12.

Provided is a current breaker for an aerial vehicle that can prevent occurrence of a minor collision of propellers or other components in operation with a person and can prevent occurrence of a deployment failure of a lift generating member at a crash of the aerial vehicle. A current breaker 100 for an aerial vehicle includes a rupture plate 23 that disconnects a current supply path 30 that electrically connects an electric device and an electric circuit, an igniter 10 that damages the rupture plate 23 by directly or indirectly applying a destructive force (heat and pressure) toward the current supply path 30 with respect to the rupture plate 23, and disconnects the current supply path 30 by the rupture plate 23 that has been damaged, and a controller 24 that drives the igniter 10 upon detection of an abnormality.

A switch includes: an ignition chamber; a pyrotechnic actuator for releasing gas into the ignition chamber upon ignition; a first conductor and a second conductor, the first and second conductors including connection contacts; a third conductor moveable in a direction from a first position towards a second position upon actuation by the pyrotechnic actuator; and a breakable retaining member for retaining the third conductor in the first position prior to actuation by the pyrotechnic actuator, the retaining member breaking upon actuation of the pyrotechnic actuator to allow movement of the third conductor. In the first position, the third conductor is arranged between, and in electrical and physical contact with, the first and second conductors to define a current conduction path. In the second position, the third conductor is electrically and physically separate from the first and second conductors.

A pyrotechnic disconnect comprises: a housing with at least a combustion chamber therein; a pyrotechnic charge in the combustion chamber; a busbar covering an opening of the combustion chamber, the busbar configured to be severed by activation of the pyrotechnic charge; and arc splitter plates arranged in the housing on an opposite side of the busbar from the combustion chamber.

A pyrotechnic disconnect comprises: a housing with at least a combustion chamber therein; a pyrotechnic charge in the combustion chamber; a busbar covering an opening of the combustion chamber, the busbar configured to be severed by activation of the pyrotechnic charge; and an exhaust port from the housing, the exhaust port configured to allow gas from the activation of the pyrotechnic charge to help suppress an electric arc formed by the severing of the busbar.

The present invention provides an electric circuit breaker device, wherein, in a cylindrical space penetrating from a first end to a second end of a housing made of a synthetic resin, an igniter, a projectile made of a synthetic resin, and a conductor piece forming part of an electric circuit are arranged axially in this order from the first end of the housing, and the device has an insulating space for receiving a cut portion of the conductor piece between the second end of the housing and the conductor piece, wherein the conductor piece is a plate piece composed of connection sections at both ends thereof and a cutting section as an intermediate portion, and is disposed so that the cutting section has a surface perpendicular to the axial direction of the housing; the projectile is disposed to face the surface of the cutting section of the conductor piece in the axial direction of the housing; and a cylinder made of a metal for reinforcing the housing is disposed between the projectile and an inner wall surface of the housing.

Electrical fuse element 12 comprising a switchable load path 22 and a switchable fuse path 36, wherein the load path 22 and the fuse path 36 are short-circuited with their respective inputs 14. The load path 22 and the fuse path 36 are in mechanical connection with each other in such a way that an electrical opening of the load path 22 causes an electrical closing of the fuse path 36 and that a melting fuse 38 arranged in the fuse path 36 is triggered at the moment of closing of the fuse path 36.

An expansion module (1) for a charging point has a DC measuring device (3) configured, when installed in the charging point, to carry out a current and voltage measurement on the DC charging lines of the charging point. An evaluation unit (2) is coupled to the DC measuring device (3) and calculates an amount of energy drawn based on the current and voltage measurement carried out by the DC measuring device (3). A display unit (4) is coupled to the evaluation unit (2) or is integrated therein. The evaluation unit (2) further has a switch-off interface (5) to provide a switch-off signal at the switch-off interface (5) if, on the basis of the current and/or voltage measurement carried out by the DC measuring device (3), it is determined that an overcurrent or short circuit is present. A charging point equipped with the expansion module (1) also is provided.

A breaker includes conductors, each including an elongated flat cut portion, cutting chambers arranged in correspondence with the cut portions, a single cutting member that includes blades to cut the cut portions in the cutting chambers, a gas generator that generates gas to move the cutting member toward the cut portions, and an arc attenuation portion located between the two cut portions that are adjacent to each other. The conductors are located between two devices. Each cut portion is cut to form two separated cutting ends and electrically disconnect the devices. The arc attenuation portion attenuates an arc generated between the two cutting ends of one of the two adjacent cut portions and the two cutting ends of the other cut portion.