22results about "Explosion operated switches" patented technology

The application relates to the technical field of fuses, and discloses a variable threshold integrated protection device, which comprises a shell, a cavity and an arc extinguishing chamber arranged in the shell, and a busbar arranged in the shell and located between the cavity and the arc extinguishing chamber; an exploder arranged in the cavity; a piston arranged in the cavity and located between the exploder and the busbar, the piston moving towards the busbar under the driving action of the exploder and breaking the busbar; a shunt arranged in the shell and connected with the busbar in series, the shunt being used for detecting a current signal passing through the busbar; and a controller arranged in the shell and connected with the shunt, the controller being used for monitoring the current signal and outputting a trigger signal to control the exploder to be electrified and exploded when the current signal is abnormal. The shunt and the controller are integrated in the shell, the active monitoring of the fault current and the active triggering of the cut-off current can be realized, and the circuit can be reliably and effectively protected.

The invention relates to a disconnect switch (8) for an electrical circuit (1), comprising a busbar via which a first power terminal of the disconnect switch (8) is electrically connected to a second power terminal of the disconnect switch (8), and a pyrotechnic disconnect device (14) for cutting the busbar, which has an ignition device (16) electrically connected to ignition terminals (20) of the disconnect switch (8) located externally. The pyrotechnic disconnect device (14) is provided with a further ignition device (17) that can be controlled independently of the ignition device (16) and is electrically connected to further ignition terminals (21) of the disconnect switch (8) that are separate from the ignition terminals (20) and located externally. The invention further relates to an electrical circuit (1) and a method for operating an electrical circuit (1).

The invention relates, among other things, to a pyrotechnic current separator (1) with a gas generator (70), a separating piston (90) movable in a firing channel (80) and an electrical conductor (50) which penetrates the firing channel (80) in the initial state before the gas generator (70) is triggered and is interrupted by the separating piston (90) after the gas generator (70) is triggered.According to the invention, a section of the firing channel (80) facing the gas generator (70) is formed by a guide tube (100) which guides the separating piston (90) towards the conductor (50) after ignition of the gas generator (70), the guide tube (100) is arranged in a hole (110) of a housing part (10) and the inner cross-section of the hole (110) is at least partially larger than the outer cross-section of the guide tube (100) and a gap (SP) is present between the hole (110) and the guide tube (100) before the gas generator (70) is triggered, which allows the guide tube (100) to expand radially outwards after the gas generator (70) is triggered by the gas pressure of the gas generator (70).

Provided are a power disconnect device (400), a power conversion apparatus (1) and an electric vehicle (6), relating to the field of switching devices. The power disconnect device (400) comprises a first housing (10), a second housing (20), a current carrying busbar (30), an igniter (40), and a moving member (50). In a first direction, the current carrying busbar (30) is arranged between the first housing (10) and the second housing (20). The first housing (10) is provided with an accommodating recess (11), a mounting recess (12), and at least one air passage (13) making the accommodating recess (11) in communication with the mounting recess (12), and the moving member (50) is slidably connected in the accommodating recess (11) in the first direction. In a second direction, the mounting recess (12) is spaced apart from the accommodating recess (11) and used for accommodating the igniter (40). Each air passage (13) comprises an inlet (13a) located on a recess wall of the mounting recess (12) and an outlet (13b) located on a recess wall of the accommodating recess (11). In the first direction, the distance between the inlet (13a) and the current carrying busbar (30) is less than the distance between the surface (501) of the moving member (50) facing away from the second housing (20) and the current carrying busbar (30), and the outlet (13b) is at least partially located on the side of the moving member (50) facing away from the current carrying busbar (30). The igniter (40) is used for driving the moving member (50) to break the current carrying busbar (30). By adjusting the position of the inlet (13a), the igniter (40) and the moving member (50) can overlap in the second direction, thereby facilitating miniaturization design.

The present invention provides a switching device equipped with a pyrotechnic excitation device. [Solution] The switching electrical device includes a switching electrical device body and a pyrotechnic excitation device. The switching electrical device body includes a fixed contact portion and a movable contact portion. The pyrotechnic excitation device has an independent modular structure and is fixedly attached to the switching electrical device body from the outside. Depending on the load condition of the switching electrical device body, it ignites a gunpowder to generate an explosive shock force that pushes the movable contact portion away from the fixed contact portion, thereby assisting in the rapid shutdown of the switching electrical device.

The application provides a control circuit and a control device. The control circuit comprises: a current sampling module, which is connected to both ends of a shunt to collect a first voltage signal on the shunt; an amplification module, which is used for amplifying the first voltage signal to obtain a second voltage signal and transmitting the second voltage signal to a signal processing module; the signal processing module is used for generating a corresponding first target control signal or a second target control signal according to the second voltage signal and a first reference voltage signal or a second reference voltage signal, and outputting the first target control signal or the second target control signal to a driving module; the driving module is used for generating a driving signal according to the first target control signal or the second target control signal, and outputting the driving signal to an ignition device, wherein the driving signal is used for driving the ignition device to ignite an explosion device in an intelligent fuse. In this way, the control mode for the ignition device is increased, so that the intelligent fuse can adapt to complex environments.

This application provides a circuit breaker, a power conversion device, and an electric vehicle, relating to the field of switching devices. The circuit breaker includes a first housing, a second housing, a flow channel, an igniter, and a moving component. In a first direction, the flow channel is disposed between the first housing and the second housing. The first housing has a receiving groove, a mounting groove, and at least one air passage connecting the receiving groove and the mounting groove. The moving component is slidably connected to the receiving groove along the first direction. In a second direction, the mounting groove and the receiving groove are spaced apart and used to receive the igniter. Each air passage includes an inlet located on the groove wall of the mounting groove and an outlet located on the groove wall of the receiving groove. In the first direction, the distance between the inlet and the flow channel is less than the distance between the surface of the moving component facing away from the second housing and the flow channel, and the outlet is at least partially located on the side of the moving component facing away from the flow channel. The igniter is used to drive the moving component to break the flow channel. By adjusting the inlet position, the igniter and the moving component can overlap in the second direction, facilitating miniaturization design.

The invention relates to a high-voltage traction drive (100) comprising a high-voltage traction battery (110) with a positive and a negative high-voltage terminal (HV+, HV-), a high-voltage traction motor (120), high-voltage power electronics (30) which electrically supplies the high-voltage traction motor (120), wherein the high-voltage power electronics (30) is connected to the two high-voltage terminals (HV+, HV-) of the high-voltage traction battery (110) via a positive and a negative electrical high-voltage line (112, 114), a vehicle ground line (12) which is electrically at the potential of the vehicle ground (GND), an intermediate circuit capacitor arrangement (20) which is electrically arranged between the high-voltage power electronics (30) and the high-voltage traction battery (110), and a pyrotechnic disconnect switch (10) which, upon activation, disconnects the positive electrical High-voltage line (114) disconnects,simultaneously connects its electronic section (114'), which is electrically isolated from the high-voltage traction battery (110), to the negative high-voltage line (112) via an electrical short-circuit connection (16), and simultaneously connects the electronic section (114') of the high-voltage line (114), which is disconnected from the high-voltage traction battery (110), to the vehicle ground line (12) via a ground connection (17).

This invention discloses an automatic ignition device replacement mechanism and an intelligent, safe, and efficient pyrotechnic-type circuit breaker. The automatic ignition device replacement mechanism includes: a housing, a base, a rotating shaft, a limiting component, a triggering component, a mounting plate, an ignition device, and a control plate. An explosion channel is provided at the top of the housing, with the ignition device correspondingly positioned below. The base is installed at the bottom of the housing to house the power component. The rotating shaft is rotatably mounted on the base, with its lower end connected to the power component. The pyrotechnic-type circuit breaker includes: a housing, and a power-off module and a conductive part installed within the housing. The conductive part includes a copper busbar installed on the housing and a conductive plate connected to the power-off module. The conductive plate contacts the copper busbar to connect the circuit. The power-off module moves under the impact of the ignition device's detonation, thereby causing the conductive plate to separate from the copper busbar to disconnect the circuit. This invention comprehensively overcomes the limitations of traditional fuses, from innovative structural design to reusability and optimized working principle.

A series switch is connected between a negative electrode of a first battery and a positive electrode of a second battery. A first parallel switch is connected between a negative electrode of the second battery and a point that is between the series switch and the negative electrode of the first battery. A second parallel switch is connected between a positive electrode of the first battery and a point that is between the series switch and the positive electrode of the second battery. A first pyro-fuse is connected between the negative electrode of the first battery and a point that is between the series switch and the first parallel switch. A second pyro-fuse is connected between the positive electrode of the second battery and a point that is between the series switch and the second parallel switch.

The invention relates, among other things, to a pyrotechnic current separator (1) with a gas generator (70), a separating piston (90) movable in a firing channel (80), an electrical conductor (50), and a filter device (200), wherein the conductor (50) penetrates the firing channel (80) in the initial state before the gas generator (70) is triggered and is interrupted by the separating piston (90), which, after the gas generator (70) is triggered, moves from an upper channel area above the conductor (50) to a lower channel area below the conductor (50), punching out a coin (53) and forming a first conductor electrode (51) and a second conductor electrode (52) separated from the first conductor electrode (51), and wherein the filter device (200) is or can be briefly subjected to an electric arc (L1, L2) immediately after the conductor (50) is interrupted, if the conductor (50) is in The current-carrying state is interrupted.According to the invention, the filter device (200) extends from a first near area (201) of the filter device (200) near the first conductor electrode (51) to a second near area (202) of the filter device (200) near the second conductor electrode (52) and, after the interruption of the electrical conductor (50), enables a current path that extends from the first conductor electrode (51) via a first arc (L1) to the first near area (201), along the filter device (200) to the second near area (202) and from there via a second arc (L2) to the second conductor electrode (52).

The present invention relates to an electrically normally open contact comprising: a first electrical connection portion (4a) and a second electrical connection portion (4b); a first contact element (6a) electrically connected to the first connection portion; a second contact element (6b) electrically connected to the second connection portion; a connecting element (8) by means of which an electrical connection can be established between the two contact elements; and a driver (10) for realizing relative movement between the contact elements and the connecting element, wherein the connecting element (8) or the contact elements (6a, 6b) are at least partially formed of a conductive porous metal.

A system for protecting against a short circuit, including a main branch and a secondary branch having a fuse, the system including a pyrotechnic actuator having a gas generator and a piston movable between an initial position and a final position, the system being configured to occupy the following positions: a passive position; and an active position, wherein the secondary branch includes a movable slide which is rigidly connected to one end of the fuse and is capable of being translated by the piston when the system moves from its passive position to its active position, the system being configured so that the slide causes the fuse to break after the main branch has opened when the system moves from its passive position to its active position.

This application provides a high-voltage self-triggered excitation fuse, including a fuse housing and a conductor. A control circuit board is disposed in the fuse housing, and a self-triggered circuit including a current limiting unit is arranged in the control circuit board. A first wiring portion of the conductor extends outside the fuse housing, and a second wiring portion of the conductor extends outside the fuse housing. Each first movable chamber in the fuse housing is provided with at least one ignition device and at least one first impact member. The first controlled end of the at least one ignition device is connected to the output end of the current limiting unit, the input end of the current limiting unit is connected to the first end of the signal fuse, and the second controlled end of the ignition device is connected to the second end of the signal fuse. When the voltage signal collected between the first controlled end and the second controlled end is greater than a first preset threshold, the at least one ignition device is triggered to generate explosive gas to push the corresponding first impact member to impact the corresponding first weak point.

The present invention provides a switching device equipped with a pyrotechnic excitation device. [Solution] The switching electrical device includes a switching electrical device body and a pyrotechnic excitation device. The switching electrical device body includes a fixed contact portion and a movable contact portion. The pyrotechnic excitation device has an independent modular structure and is fixedly attached to the switching electrical device body from the outside. Depending on the load condition of the switching electrical device body, it ignites a gunpowder to generate an explosive shock force that pushes the movable contact portion away from the fixed contact portion, thereby assisting in the rapid shutdown of the switching electrical device.

The present invention provides a switching device equipped with a pyrotechnic excitation device. [Solution] The switching electrical device includes a switching electrical device body and a pyrotechnic excitation device. The switching electrical device body includes a fixed contact portion and a movable contact portion. The pyrotechnic excitation device has an independent modular structure and is fixedly attached to the switching electrical device body from the outside. Depending on the load condition of the switching electrical device body, it ignites a gunpowder to generate an explosive shock force that pushes the movable contact portion away from the fixed contact portion, thereby assisting in the rapid shutdown of the switching electrical device.

A manual disconnect switching device includes an external housing having a handle actuator. The manual disconnect switching device further includes a bellows actuator in communication with the handle actuator and hermetically sealed within an internal volume of the external housing. The bellows actuator includes a shaft and a biased bellows for switching the manual disconnect switching device between open and closed positions.

The present invention provides a switching device equipped with a pyrotechnic excitation device. [Solution] The switching electrical device includes a switching electrical device body and a pyrotechnic excitation device. The switching electrical device body includes a fixed contact portion and a movable contact portion. The pyrotechnic excitation device has an independent modular structure and is fixedly attached to the switching electrical device body from the outside. Depending on the load condition of the switching electrical device body, it ignites a gunpowder to generate an explosive shock force that pushes the movable contact portion away from the fixed contact portion, thereby assisting in the rapid shutdown of the switching electrical device.

The invention relates to a system for protecting an electrical circuit, which system comprises: - a main pyrotechnic circuit breaker (1) comprising: • a main electrical conductor (100); • a main electro-pyrotechnic initiator (10) arranged to cause the main electrical conductor (100) to be cut off; - a device (2) for disconnecting the electrical circuit, which device comprises: • a fuse element (21); • a priming circuit breaker (20) comprising:  a priming conductor (200);  a pyrotechnic priming actuator (201) arranged to be controlled by an electronic control unit so as to cut off the priming conductor (200), characterised in that a cut-off voltage of the priming circuit breaker (20) and / or a cut-off voltage of the fuse element (21) are each lower than a supply voltage of the electrical circuit, and in that the main electro-pyrotechnic initiator (10) is connected to the disconnection device (2) in order to be triggered by the disconnection device (2).

In an example, a circuit includes a transistor and a first amplifier having an output coupled to a control terminal of the transistor. The circuit includes a second amplifier having a second amplifier output coupled to the control terminal of the transistor. The circuit includes a resistor-capacitor network. The circuit also includes a first switch coupled to the first amplifier output, the transistor, and the resistor-capacitor network. The circuit includes a second switch coupled to the second amplifier output, the transistor, and the resistor-capacitor network, where the first switch is configured to couple the first amplifier output to the resistor-capacitor network, and the second switch is configured to couple the second amplifier output to the resistor-capacitor network.

A pyrolytic fuse comprises a fuse housing with upper and lower terminals. A guide rod, an actuating unit, and a terminal adapter are mounted inside the fuse housing. When the guide rod is in its first position, the upper and lower terminals are electrically connected via the guide rod. When the guide rod is in its second position, the actuating unit causes a separable connection structure to break the electrical connection between the upper and lower terminals.