Cutoff device, cutoff system, vehicle, and detection unit

Abstract

A cutoff device (4) comprises a detection unit (1) and a cutoff unit (2). The cutoff unit (2) is electrically connected to the detection unit (1). The detection unit (1) has a core (10), a coil (11), and a full-wave rectifier circuit (12). The core (10) is formed of a magnetic body. The coil (11) is wound around the core (10). The full-wave rectifier circuit (12) is electrically connected to the coil (11). The cutoff unit (2) has an igniter (21) and a projectile (22). The igniter (21) contains an explosive. The igniter (21) is electrically connected to the full-wave rectifier circuit (12). The igniter (21) is configured so as to be able to ignite the explosive by the electric power generated by the coil (11). The projectile (22) moves in accordance with the ignition of the explosive.

Description

Isolation device, isolation system, vehicle, and detection unit

[0001] The present disclosure relates generally to an interrupting device, an interrupting system, a vehicle, and a detection unit. More particularly, the present disclosure relates to an interrupting device with an igniter, an interrupting system with an interrupting device, and a vehicle with an interrupting device.

[0002] Patent Document 1 discloses a continuity interrupting device equipped with a gas generator. The continuity interrupting device of Patent Document 1 is applied to an electric circuit. The electric circuit includes a storage battery and an electric device as components thereof. In this electric circuit, the electric device is operated by power supplied from the storage battery. The continuity interrupting device of Patent Document 1 interrupts continuity between the devices that make up the electric circuit by cutting the conductor.

[0003] The electrical circuit is mounted on a vehicle. In the event of a vehicle collision, the continuity interrupting device interrupts continuity between devices constituting the electrical circuit, for example, between the storage battery and the electrical device. The vehicle is equipped with a collision sensor that detects whether or not a collision has occurred, and an electronic control unit that receives a signal from the collision sensor. When the electronic control unit detects a vehicle collision based on the output signal from the collision sensor, it activates the continuity interrupting device. This activation cuts off the power supply from the storage battery to the electrical device.

[0004] JP 2017-54774 A

[0005] In a circuit breaker equipped with an igniter such as a gas generator, it is desirable to improve the reliability of the operation of the igniter.

[0006] An interrupting device according to one aspect of the present disclosure includes a detection unit and an interrupting unit. The interrupting unit is electrically connected to the detection unit. The detection unit has a core, a coil, and a full-wave rectifier circuit. The core is formed of a magnetic material. The coil is wound around the core. The full-wave rectifier circuit is electrically connected to the coil. The interrupting unit has an igniter and a projectile. The igniter includes explosives. The igniter is electrically connected to the full-wave rectifier circuit. The igniter is configured to be able to ignite the explosives using power generated by the coil. The projectile moves in response to the ignition of the explosives.

[0007] The interruption system according to one aspect of the present disclosure includes the interruption device and a control unit. The control unit is connected in parallel with the full-wave rectifier circuit when viewed from the igniter. The control unit is capable of supplying a current to the igniter to ignite the explosive without relying on the power generated by the coil.

[0008] An interruption system according to one aspect of the present disclosure includes the interruption device and a control unit. The control unit is connected in parallel with the full-wave rectifier circuit when viewed from the igniter. The control unit is capable of supplying current to the igniter to ignite the explosive without relying on the power generated by the coil. The interruption device further includes a switching element. The switching element includes a first terminal electrically connected to the full-wave rectifier circuit and a second terminal electrically connected to the igniter. When a voltage equal to or greater than a first value is applied to the switching element, the switching element causes a current to flow from the first terminal to the second terminal. The switching element includes a bidirectional thyristor. The interruption system further includes a rectifier element including an anode electrically connected to the second terminal of the switching element and a cathode electrically connected to the control unit.

[0009] A vehicle according to one aspect of the present disclosure includes the interrupter, a battery, a bus bar, a control unit, a sensor, and a motor. The bus bar is electrically connected to the battery. The bus bar faces the inner surface of the core. The control unit is connected in parallel with the full-wave rectifier circuit when viewed from the igniter. The control unit is capable of supplying current to the igniter to ignite the explosive without relying on the power generated by the coil. The sensor is electrically connected to the control unit. The motor is electrically connected to the battery via the bus bar. In the vehicle, when an overcurrent flows between the battery and the motor, the explosive is ignited by the power generated by the coil of the interrupter. In the vehicle, when it is determined that an abnormality has occurred in the vehicle based on the detection result of the sensor, the explosive is ignited by the current supplied from the control unit. The projectile is configured to move toward the bus bar in response to the ignition of the explosive, thereby cutting off the electrical connection between the battery and the motor.

[0010] A detection unit according to one aspect of the present disclosure includes a core formed of a magnetic material, a coil wound around the core, a full-wave rectifier circuit electrically connected to the coil, and a first switching element.

[0011] The first switching element includes a first terminal electrically connected to the full-wave rectifier circuit and a second terminal electrically connected to an igniter, and when a voltage equal to or greater than a first value is applied, causes a current to flow from the first terminal to the second terminal.

[0012] The present disclosure has the advantage of being able to provide a cutoff device, a cutoff system, a vehicle, and a detection unit that can improve the reliability of igniter operation.

[0013] FIG. 1 is a diagram showing a circuit configuration of an interrupting device of an embodiment. FIG. 2 is a perspective view of a detection unit provided in the interrupting device. FIG. 3 is a perspective view of a main part of the detection unit. FIG. 4 is a cross-sectional view of the detection unit. FIG. 5 is a cross-sectional view of the interrupting unit provided in the interrupting device. FIG. 6 is a graph showing a time change in current when a positive short-circuit current flows through a bus bar of the interrupting device. FIG. 7 is a graph showing a time change in current when a negative short-circuit current flows through a bus bar of the interrupting device. FIG. 8 is a diagram showing a circuit configuration of an interrupting system of an embodiment. FIG. 9 is a diagram showing a circuit configuration of an interrupting system of a comparative example. FIG. 10 is a diagram showing a circuit configuration of an interrupting system of a reference example. FIG. 11 is a graph showing a time change in current when a positive short-circuit current flows through a bus bar of the interrupting device of the reference example. FIG. 12 is a graph showing a time change in current when a negative short-circuit current flows through a bus bar of the interrupting device of the reference example. FIG. 13 is a schematic configuration diagram of a vehicle equipped with the interrupting device of the same embodiment. Fig. 14 is a diagram showing the circuit configuration of the vehicle in the same embodiment. Fig. 15A is a diagram showing the circuit configuration of a first switching element provided in the interrupter device of modified example 1. Fig. 15B is a diagram showing the circuit configuration of a second switching element provided in the interrupter device of the same embodiment. Fig. 16 is a diagram showing the circuit configuration of a detection unit provided in the interrupter device of modified example 2. Fig. 17 is a schematic configuration diagram showing the connection relationship between each unit of the interrupter system of modified example 3. Fig. 18 is a schematic configuration diagram showing the connection relationship between each unit of the interrupter system of modified example 4. Fig. 19 is a schematic configuration diagram showing the connection relationship between each unit of the interrupter system of modified example 5. Fig. 20 is a schematic configuration diagram showing the connection relationship between each unit of the interrupter system of modified example 6.

[0014] Below, an isolation device, an isolation system, a vehicle, and a detection unit according to embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the following embodiments are merely a portion of various embodiments of the present disclosure. The following embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Furthermore, the drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0015] (1) Embodiment The barrier device 4, barrier system 5, vehicle 6, and detection unit 1 of this embodiment will be described with reference to FIGS. 1 to 14. FIG.

[0016] (1.1) Circuit Breaker As shown in Fig. 1 , the circuit breaker 4 includes a detection unit 1 and a circuit breaker unit 2 electrically connected to the detection unit 1. In the present disclosure, "the first member and the second member are electrically connected" means that the first member and the second member are connected directly or via a third member so that electricity can flow from the first member to the second member (and / or from the second member to the first member). In this embodiment, the detection unit 1 and the circuit breaker unit 2 are connected by a cable having a first electric wire 71 and a second electric wire 72.

[0017] 1, the detection unit 1 includes a coil 11, a full-wave rectifier circuit 12, a first resistor 131, a second resistor 132, a third resistor 133, a capacitor 14, a first switching element 15, and a second switching element 16. As shown in FIGS. 1 to 4, the detection unit 1 further includes a core 10, a connector 17, a substrate 18, and a housing 19.

[0018] 1 , the connector 17 has a detection-side first connection terminal 171 and a detection-side second connection terminal 172. The connector 17 is held in the housing 19 so that the detection-side first connection terminal 171 and the detection-side second connection terminal 172 are exposed from the housing 19.

[0019] 3 , the substrate 18 is a rectangular plate. The circuit components of the detection unit 1 (including, in this embodiment, the full-wave rectifier circuit 12, the first resistor 131, the second resistor 132, the third resistor 133, the capacitor 14, the first switching element 15, and the second switching element 16) are mounted on the substrate 18. The connector 17 is also mounted on the substrate 18.

[0020] The housing 19 houses or holds the core 10, the coil 11, the connector 17, and the board 18 (including the circuit components of the detection unit 1).

[0021] 2 and 4, the housing 19 has a hollow rectangular parallelepiped shape. The housing 19 has a box-shaped main body 191 with one open surface (hereinafter referred to as the “top surface”), and a rectangular plate-shaped lid member 192 that closes the open top surface of the main body 191.

[0022] The connector 17 protrudes from the cover 192 of the housing 19 so that the detection-side first connection terminal 171 and the detection-side second connection terminal 172 are exposed upward.

[0023] As shown in FIG. 2, a through-hole 190 is formed in the housing 19. The through-hole 190 is formed in a main body 191. The through-hole 190 penetrates the housing 19 in one direction. Here, the through-hole 190 penetrates the housing 19 in a direction (hereinafter referred to as the "front-rear direction") that intersects (here, orthogonal to) the up-down direction. As shown in FIG. 4, the through-hole 190 is formed in the bottom wall of the housing 19. The through-hole 190 has a rectangular cross-sectional shape. The width dimension (left-right dimension) of the through-hole 190 is greater than the height dimension (up-down dimension).

[0024] 2 , the bus bar 9 is passed through the through hole 190. The shape and dimensions of the through hole 190 are determined according to, for example, the shape and dimensions of the bus bar 9. For example, the through hole 190 can be formed to substantially match the shape and dimensions of the bus bar 9 that will be passed through the through hole 190.

[0025] The core 10 is made of a magnetic material. As shown in Figures 3 and 4, the core 10 is formed in a cylindrical, here a rectangular cylindrical, shape with a through-hole 100 in the axial direction, with the front-to-rear direction being the axial direction. The core 10 is formed by combining and joining a rectangular plate-shaped first member 101 and a U-shaped plate-shaped second member 102 in a front view. The second member 102 of the core 10 is formed integrally with the main body 191 of the housing 19, for example, by forming the main body 191 of the housing 19 by insert molding using the second member 102 as an insert component.

[0026] 3 and 4 , a through hole 100 is formed in the core 10 so as to be surrounded by a first member 101 and a second member 102. The core 10 is housed inside the housing 19 so that the through hole 190 of the housing 19 is positioned within the through hole 100 of the core 10. In other words, the core 10 is provided in the housing 19 so as to surround the through hole 190 of the housing 19 (as viewed from the front).

[0027] The bus bar 9 is passed through the through hole 190 of the housing 19, and thereby the bus bar 9 is passed through the through hole 100 of the core 10. Therefore, the core 10 has an inner surface 103 (the inner surface of the through hole 100) facing the bus bar 9.

[0028] The coil 11 is wound around the core 10. The coil 11 is wound around, for example, a first member 101 of the core 10. Here, a bobbin 110 made of an insulating material such as a resin material is attached to the first member 101 of the core 10, and the coil 11 is wound around the first member 101 of the core 10 via the bobbin 110. The coil 11 is formed by winding a conductive wire (for example, a copper wire).

[0029] The coil 11, together with the core 10 and the bus bar 9, constitutes a transformer. That is, when the current Ib flowing through the bus bar 9 as a primary winding changes, the magnetic flux passing through the core 10 changes, and an induced current Ic flows through the coil 11 as a secondary winding.

[0030] In the detection unit 1 of this embodiment, a through hole 190 is formed in the housing 19, and a core 10 is provided to surround the through hole 190, so that the bus bar 9 and the coil 11 can be magnetically coupled simply by placing the bus bar 9 in the through hole 190.

[0031] The substrate 18 is, for example, a printed wiring board. The substrate 18 is housed in the housing 19 so that its normal direction faces the up-down direction (a direction intersecting the penetration direction of the through-hole 190; a direction along the protruding direction of the connector 17). As described above, the circuit components of the detection unit 1, the connector 17, and the like are mounted on the substrate 18. In addition, the substrate 18 is provided with conductors (pattern conductors) that connect the circuit components, etc. Both ends of the coil 11 are connected to the pattern conductors of the substrate 18.

[0032] Referring to FIG. 1 , the second resistor 132 is electrically connected to both ends of the coil 11 .

[0033] The full-wave rectifier circuit 12 is electrically connected to the coil 11. The full-wave rectifier circuit 12 is a so-called bridge diode. The full-wave rectifier circuit 12 includes four diodes 120 connected in a bridge configuration.

[0034] The full-wave rectifier circuit 12 has a first input terminal 121, a second input terminal 122, a first output terminal 123, and a second output terminal 124. The first input terminal 121 of the full-wave rectifier circuit 12 is electrically connected to a first terminal of the second resistor 132 (and a first terminal of the coil 11). The second input terminal 122 of the full-wave rectifier circuit 12 is electrically connected to a second terminal of the second resistor 132 (and a second terminal of the coil 11). In other words, the second resistor 132 (and the coil 11) are electrically connected between the pair of input terminals 121, 122 of the full-wave rectifier circuit 12.

[0035] The first output terminal 123 is a high-potential output terminal, and the second output terminal 124 is a low-potential output terminal. The full-wave rectifier circuit 12 converts (rectifies) the direction of a current input to the pair of input terminals 121 and 122 into a direction from the first output terminal 123 through an external circuit to the second output terminal 124 (the direction of the arrow of the current Ir in FIG. 1 ).

[0036] The first resistor 131 is electrically connected between the pair of output terminals 123 and 124 of the full-wave rectifier circuit 12 .

[0037] The first switching element 15 is electrically connected to the full-wave rectifier circuit 12. The first switching element 15 includes a first terminal 151 electrically connected to the full-wave rectifier circuit 12 and a second terminal 152 electrically connected to the igniter 21. As shown in FIG. 1 , the first terminal 151 is electrically connected to the first output port 123 of the full-wave rectifier circuit 12. The second terminal 152 is electrically connected to a first terminal of the second switching element 16. The second terminal 152 is electrically connected to a first terminal 211 of the igniter 21 via the second switching element 16.

[0038] The first switching element 15 includes, for example, a thyristor. The thyristor is, for example, a bidirectional thyristor. The first switching element 15 may be a packaged element, for example, a SIDAC (registered trademark, the same applies hereinafter).

[0039] The first switching element 15 passes (almost no) current when the voltage value applied across both ends of the first switching element 15 (between the first terminal 151 and the second terminal 152) is less than a first value. On the other hand, when a voltage equal to or greater than the first value is applied to the first switching element 15, the first switching element 15 passes current from the first terminal 151 to the second terminal 152. The first value is, for example, a breakover voltage of the first switching element 15 as a sidac.

[0040] The capacitor 14 is electrically connected to the first switching element 15. A first end of the capacitor 14 is electrically connected to the second terminal 152 of the first switching element 15, and a second end of the capacitor 14 is electrically connected to the second output terminal 124 of the full-wave rectifier circuit 12. The capacitor 14 accumulates the charge of the current Ir flowing through the first switching element 15.

[0041] The third resistor 133 is electrically connected to both ends of the capacitor 14 .

[0042] The second switching element 16 is electrically connected to the first switching element 15. The second switching element 16 includes a third terminal 161 electrically connected to the first switching element 15 and a fourth terminal 162 electrically connected to the igniter 21. As shown in Fig. 1 , the third terminal 161 is electrically connected to the second terminal 152 of the first switching element 15. The fourth terminal 162 is electrically connected to the detection-side first connection terminal 171.

[0043] The second switching element 16 includes, for example, a thyristor. The thyristor is, for example, a bidirectional thyristor. The second switching element 16 may be a packaged element, for example, a SIDAC.

[0044] The second switching element 16 (almost no current) passes when the voltage value applied across the second switching element 16 (between the third terminal 161 and the fourth terminal 162) is less than a second value. On the other hand, when a voltage equal to or greater than the second value is applied, the second switching element 16 passes current from the third terminal 161 to the fourth terminal 162. The second value is, for example, a breakover voltage of the second switching element 16 as a sidac. In this embodiment, the second value is the same as the first value. Note that in the present disclosure, two elements being "the same" may mean that the two elements are strictly the same, but is not limited to this. For example, the two elements may be substantially the same, or may include a difference of, for example, about several percent (or about 10%).

[0045] 1, the detection unit 1 further includes a rectifying element (diode) 180. As shown in Fig. 1, the anode of the diode 180 is electrically connected to the fourth terminal 162 of the second switching element 16, and is thereby electrically connected to the second terminal 152 of the first switching element 15 via the second switching element 16. In addition, the cathode of the diode 180 is electrically connected to the detection-side first connection terminal 171, and is thereby electrically connected to the control unit 30, which will be described later.

[0046] The detection-side first connection terminal 171 of the connector 17 is electrically connected to the fourth terminal 162 of the second switching element 16. Here, the detection-side first connection terminal 171 of the connector 17 is electrically connected to the fourth terminal 162 of the second switching element 16 via a diode 180. The detection-side second connection terminal 172 of the connector 17 is electrically connected to the second output end 124 of the full-wave rectifier circuit 12.

[0047] As shown in Fig. 1, the breaking unit 2 includes an igniter 21 and a projectile 22. As shown in Fig. 5, the breaking unit 2 further includes a conductor 23 and a housing 24. The housing 24 holds or houses the igniter 21, the projectile 22, and the conductor 23.

[0048] The igniter 21 is electrically connected to the full-wave rectifier circuit 12. A first end 211 of the igniter 21 is electrically connected to the detection-side first connection terminal 171 of the detection unit 1 (here, via the first electric wire 71). A second end 212 of the igniter 21 is electrically connected to the detection-side second connection terminal 172 of the detection unit 1 (here, via the second electric wire 72). As a result, the igniter 21 is electrically connected to the full-wave rectifier circuit 12 via the first switching element 15 and the second switching element 16.

[0049] The igniter 21 is a so-called electric igniter. As shown in Figures 1 and 5, the igniter 21 includes a heating element 213 and explosives 214.

[0050] The heating element 213 is, for example, a nichrome wire or an alloy wire of iron, chromium, and aluminum. The heating element 213 is electrically connected between the first end 211 and the second end 212 of the igniter 21. The heating element 213 generates heat when a current flows through the heating element 213.

[0051] 5, the explosive 214 is disposed around the heating element 213. The explosive 214 is ignited by the heat generated by the heating element 213. Since a current Id (see FIG. 1) caused by the electric power generated by the coil 11 flows through the heating element 213, it can be said that the igniter 21 is configured to be able to ignite the explosive 214 by the electric power generated by the coil 11.

[0052] In the igniter 21, when the gunpowder 214 is ignited, a large amount of gas is generated by the combustion of the gunpowder 214. The generated gas is released into the internal space 240 of the housing 24 in which the igniter 21 is housed.

[0053] 5, the projectile 22 is disposed in an internal space 240 of the housing 24. The projectile 22 is disposed inside the housing 24 at a position between the igniter 21 and the conductor 23. The projectile 22 is held by a holder 241 provided in the housing 24. The projectile 22 is held by the holder 241 so as to face the conductor 23. The holder 241 is the inner surface of the housing 24 in this example, but may have a protrusion or the like that protrudes from the inner surface of the housing 24 and holds the projectile 22.

[0054] The projectile 22 is ejected and moves from the holder 241 under the pressure of the gas generated by the igniter 21. That is, the projectile 22 is ejected and moves in response to the ignition of the gunpowder 214.

[0055] The projectile 22 ejected from the holder 241 moves toward the conductor 23 and breaks it by pushing against it. Here, the conductor 23 is at least a part of the bus bar 9 passed through the through hole 190 of the housing 19 of the detection unit 1. Therefore, the projectile 22 is configured to move toward the conductor 23 (bus bar 9) in response to the ignition of the explosive 214. Note that the bus bar 9 passed through the through hole 190 of the housing 19 may be a metal plate separate from the conductor 23 and electrically connected to the conductor 23, or may be the conductor 23 itself.

[0056] (1.2) Operation of Circuit Breaker In the circuit breaker 4, when the change in the current Ib flowing through the busbar 9 is small (for example, when the current Ib is constant), the induced current Ic generated by the coil 11 is small (or the coil 11 does not generate the induced current Ic). In this case, even if the current Ir generated after the induced current Ic passes through the full-wave rectifier circuit 12 flows through the first resistor 131, the voltage applied to the first switching element 15 does not exceed the breakover voltage (the voltage value of the voltage applied to the first switching element 15 is less than the first value). Therefore, the first switching element 15 is maintained off, and no current flows outside the detection unit 1.

[0057] On the other hand, if the current Ib flowing through the busbar 9 changes significantly, for example, due to a short-circuit current flowing through the busbar 9, the coil 11 generates a large induced current Ic. When this induced current Ic passes through the full-wave rectifier circuit 12 and is converted into a current Ir, which flows through the first resistor 131, the voltage applied to the first switching element 15 exceeds the breakover voltage (a voltage equal to or greater than a first value is applied to the first switching element 15), turning on the first switching element 15. This charges the capacitor 14, and the voltage across the capacitor 14 increases. When the voltage across the capacitor 14 increases, the voltage applied to the second switching element 16 exceeds the breakover voltage (a voltage equal to or greater than a second value is applied to the second switching element 16), turning on the second switching element 16. As a result, the current Id from the detection unit 1 is supplied to the interrupter unit 2, and a current flows through the heating element 213, igniting the explosive 214 in the igniter 21. The projectile 22 of the breaking unit 2 is ejected in response to the ignition of the explosive 214, moves toward the conductor 23 (bus bar 9), and breaks the conductor 23. This breaks the electrical path inside the breaking unit 2.

[0058] In short, in the circuit breaking device 4 of this embodiment, when the current Ib flowing through the bus bar 9 changes significantly due to a short circuit current flowing through the bus bar 9, the circuit breaking unit 2 can break the electrical circuit including the bus bar 9.

[0059] In the circuit breaker 4 of this embodiment, the direction of the current Ir flowing out of the full-wave rectifier circuit 12 is constant (the direction of the arrow of the current Ir in FIG. 1 ), regardless of the direction of change of the current Ib flowing through the bus bar 9. For example, when a short-circuit current flows through the bus bar 9 in a positive direction (the direction of the arrow of the current Ib in FIG. 1 ), the coil 11 generates an induced current Ic in a positive direction (the direction of the arrow of the current Ic in FIG. 1 ) (see the middle part of FIG. 6 ). On the other hand, when a short-circuit current flows through the bus bar 9 in a negative direction (the direction opposite to the arrow of the current Ib in FIG. 1 ), the coil 11 generates an induced current Ic in a negative direction (the direction opposite to the arrow of the current Ic in FIG. 1 ) (see the middle part of FIG. 7 ). In either case, the induced current Ic passes through the full-wave rectifier circuit 12 and is rectified into the current Ir in a predetermined direction (the direction of the arrow of the current Ir in FIG. 1 ) (see the lower parts of FIGS. 6 and 7 ).

[0060] In this way, in the circuit breaking device 4 of this embodiment, the direction of the current Id flowing from the detection unit 1 to the circuit breaking unit 2 is the direction in which the current Id flows out from the detection side first connection terminal 171 and returns to the detection side second connection terminal 172 (the direction of the arrow of the current Id in Figure 1), regardless of the direction of change of the current Ib flowing through the bus bar 9.

[0061] (1.3) Shutdown System The shutdown device 4 is mounted on the target object. The target object is a device having an electric circuit through which current supplied from a power source passes. The shutdown device 4 is activated, for example, in the event of an abnormality in an electric circuit or system within the target object, to shut off the electric circuit, thereby preventing the damage caused by the abnormality from becoming greater.

[0062] The object on which the interrupting device 4 is mounted is, for example, a vehicle 6 (see FIG. 13 ). For example, as shown in FIG. 13 , a bus bar 9 (the bus bar 9 magnetically coupled to the coil 11) of the interrupting device 4 is electrically connected between a motor 62 in the vehicle 6 and a battery 61 (for example, a lithium-ion battery) for driving the motor. For example, in the event of an emergency such as an abnormality or accident of the vehicle 6, the interrupting device 4 interrupts the electrical connection between the motor 62 and the battery 61 by interrupting the electrical path formed by the bus bar 9. Note that the object may be an object other than the vehicle 6, and examples thereof include, but are not limited to, a home appliance and a solar power generation system.

[0063] As shown in Fig. 8 , the interrupter device 4, together with a control unit 3 provided in the object, constitutes an interrupter system 5. In other words, the interrupter system 5 includes the interrupter device 4 and the control unit 3. An example of the control unit 3 is a control device (junction box) that controls a battery 61 mounted in the object. An example of the control unit 3 is an ECU (Electronic Control Unit) 64 (see Fig. 13 ) of a vehicle 6 as the object.

[0064] 8, the control unit 3 includes a control section 30. The control unit 3 further includes a connector 31 and a housing 32.

[0065] The connector 31 has a first control-side connection terminal 311 and a second control-side connection terminal 312. The connector 31 is held in the housing 32 so that the first control-side connection terminal 311 and the second control-side connection terminal 312 are exposed from the housing 32.

[0066] For example, a cable having a first electric wire 71 and a second electric wire 72 further has a third electric wire 73 branching off from the first electric wire 71 and a fourth electric wire 74 branching off from the second electric wire 72. In other words, the cable is a branch cable.

[0067] The control-side first connection terminal 311 of the connector 31 is electrically connected to the third electric wire 73 of the cable, and thereby electrically connected to the detection-side first connection terminal 171 and the first end 211 of the igniter 21. In addition, the control-side second connection terminal 312 of the connector 31 is electrically connected to the fourth electric wire 74 of the cable, and thereby electrically connected to the detection-side second connection terminal 172 and the second end 212 of the igniter 21. In other words, the control unit 30 of the control unit 3 is connected in parallel with the full-wave rectifier circuit 12 when viewed from the igniter 21.

[0068] The housing 32 houses or holds the control unit 30 and the connector 31 .

[0069] As shown in FIG. 8, the control unit 30 includes a first switch 301 , a second switch 302 , a microcomputer 303 , a voltage source 304 , and a rectifying element (diode) 305 .

[0070] The first switch 301 is, for example, a metal-oxide-semiconductor field-effect transistor (MOSFET). The first switch 301 is electrically connected between the voltage source 304 and a control-side first connection terminal 311 via a diode 305. The anode of the diode 305 is electrically connected to the voltage source 304. The cathode of the diode 305 is electrically connected to the first switch 301. The diode 305 is, for example, an element for preventing backflow.

[0071] The second switch 302 is, for example, a MOSFET, and is electrically connected between the control-side second connection terminal 312 and ground.

[0072] The microcomputer 303 controls the on / off of the first switch 301 and the second switch 302 .

[0073] In the interruption system 5 of the present embodiment, when the microcomputer 303 turns on the first switch 301 and the second switch 302, a current Ia is supplied from the voltage source 304 to the heating element 213 of the igniter 21. This can ignite the explosive 214 of the igniter 21.

[0074] In particular, although the control unit 30 is connected in parallel to the detection unit 1 when viewed from the igniter 21, the control unit 30 can supply the current Ia to the igniter 21 to ignite the explosive 214 of the igniter 21 regardless of whether the detection unit 1 supplies the current Id. In other words, the control unit 30 can supply the current Ia to the igniter 21 to ignite the explosive 214 regardless of the power generated by the coil 11 of the detection unit 1.

[0075] In this way, in the cutoff system 5 of the present embodiment, the explosive 214 of the igniter 21 can be ignited by each of the detection unit 1 and the control unit 3. This makes it possible to improve the reliability of the operation of the igniter 21.

[0076] In particular, the control unit 30 can ignite the explosive 214 on behalf of the detection unit 1, for example, when the amount of power generated by the coil 11 is insufficient to ignite the explosive 214 or when the ignition of the explosive 214 using the power generated by the coil 11 fails. The occurrence of "when the amount of power generated by the coil 11 is insufficient to ignite the explosive 214 or when the ignition of the explosive 214 using the power generated by the coil 11 fails" can be detected by, for example, measuring the current flowing in the detection unit 1, the current flowing through the igniter 21, the current flowing through the cable connecting the detection unit 1 and the igniter 21, the voltage applied to the control unit 3, etc. For example, when the control unit 30 detects that a current flows through the first electric wire 71 even though the control unit 30 does not supply the current Ia, the control unit 30 can determine that the current Id has been supplied from the detection unit 1 (i.e., the detection unit 1 has attempted to ignite the explosive 214). Therefore, if the control unit 30 detects such a current but the explosive 214 of the igniter 21 is not ignited even after a predetermined time (which may be 0 seconds) has elapsed, the control unit 30 can determine that the amount of power generated by the coil 11 was insufficient to ignite the explosive 214, or that the power generated by the coil 11 failed to ignite the explosive 214. If the control unit 30 determines this, it may supply the current Ia to the igniter 21 instead of the detection unit 1 to ignite the explosive 214.

[0077] Of course, even if no electricity is being generated by the coil 11, the control unit 30 may supply current Ia to the igniter 21 independently of the detection unit 1 to ignite the gunpowder 214 when it detects an abnormality in the object (for example, an accident involving the vehicle 6).

[0078] (1.4) Advantages of the Circuit Breaker (1.4.1) Advantages of the Full-Wave Rectifier Circuit As described above, in the circuit breaker 4 of this embodiment, the detection unit 1 includes the full-wave rectifier circuit 12. The advantages thereof will be described below.

[0079] (1.4.1.1) Advantage 1 In the circuit breaker 4 of this embodiment, the detection unit 1 is provided with a full-wave rectifier circuit 12, which allows both the detection unit 1 and the control unit 3 to be connected to the igniter 21 at the same time. In other words, the detection unit 1 is provided with a full-wave rectifier circuit 12, which allows the circuit breaker system 5 including the circuit breaker 4 and the control unit 3 to be configured without any problems. This point will be explained with a comparison with the circuit breaker system 5A including the circuit breaker 4A of the comparative example. Note that in the circuit breaker 4A and circuit breaker system 5A of the comparative example, components similar to those of the circuit breaker 4 and circuit breaker system 5 of this embodiment will be assigned the same reference numerals and explanations thereof will be omitted as appropriate.

[0080] 9 is a block diagram showing the configuration of a cutoff system 5A of a comparative example. In FIG. 9, the configuration of the cutoff unit 2 other than the igniter 21 is omitted.

[0081] 9, the interruption system 5A of the comparative example has basically the same configuration as the interruption system 5 of the present embodiment (see FIG. 8), but the detection unit 1A of the interruption device 4A does not include the full-wave rectifier circuit 12, the second resistor 132, and the diode 180. As shown in FIG. 9, in the interruption system 5A of the comparative example, a first resistor 131 is electrically connected between both ends of the coil 11.

[0082] In the circuit breaking device 4A of the comparative example, for example, when a short-circuit current flows in the bus bar 9 in the positive direction (the direction of the arrow of current Ib in FIG. 9 ), the coil 11 generates an induced current Ic in the positive direction (the direction of the arrow of current Ic in FIG. 9 ). As a result, in the circuit breaking device 4A, the current Id flows in the direction out of the detection-side first connection terminal 171 (the direction of the arrow of current Id in FIG. 9 ; hereinafter, referred to as the "positive direction").

[0083] 9 , in the interruption system 5A of the comparative example, the control-side first connection terminal 311 on the high potential side of the control unit 3 is electrically connected to the detection-side first connection terminal 171. Therefore, in the interruption system 5A of the comparative example, even if a positive current Id flows when the first switch 301 and the second switch 302 are on, this current Id is unlikely to flow into the control unit 3 (the current Id is more likely to flow toward the igniter 21 than toward the control unit 3).

[0084] On the other hand, in the circuit breaking device 4A of the comparative example, when a short-circuit current flows in the negative direction (opposite to the arrow of current Ib in FIG. 9 ) through the bus bar 9, the coil 11 generates an induced current Ic in the negative direction (opposite to the arrow of current Ic in FIG. 9 ). As a result, in the circuit breaking device 4A, the current Id flows out of the detection-side second connection terminal 172 (opposite to the arrow of current Id in FIG. 9 ; hereinafter referred to as the “negative direction”).

[0085] 9 , in the interruption system 5A of the comparative example, the control-side second connection terminal 312 on the low potential side of the control unit 3 is electrically connected to the detection-side second connection terminal 172. Therefore, in the interruption system 5A of the comparative example, if a negative current Id flows while the first switch 301 and the second switch 302 are on, the negative current Id flows into the control unit 3 without flowing to the igniter 21. In other words, in the interruption system 5A of the comparative example, if a negative short-circuit current flows through the bus bar 9, the negative current Id from the detection unit 1A flows directly into the control unit 3, which may damage the control unit 3.

[0086] In contrast, in the circuit breaking device 4 of this embodiment, as explained in the section "(1.2) Operation of Circuit Breaker," the direction of the current Id flowing out from the detection unit 1 is constant (the direction of the arrow of the current Id in FIG. 8 ) regardless of the direction of the induced current Ic generated in the coil 11. Therefore, in the circuit breaking system 5 of this embodiment, the control unit 3 is less likely to be damaged by the current Id from the detection unit 1. Therefore, in the circuit breaking device 4 of this embodiment, both the detection unit 1 and the control unit 3 can be connected to the igniter 21 at the same time, and the circuit breaking system 5 including the circuit breaking device 4 and the control unit 3 can be configured without any problems.

[0087] Furthermore, in the circuit breaker 4 of this embodiment, the detection unit 1 is provided with a rectifying element (diode 180), which makes it possible to prevent, for example, the current Ia from the control unit 3 from flowing into the detection unit 1.

[0088] (1.4.1.2) Advantage 2 Incidentally, even in the case of the circuit breaker 4B of the reference example shown in Fig. 10, both the detection unit 1B and the control unit 3 can be connected to the igniter 21 at the same time. In contrast, the circuit breaker 4 of this embodiment has the advantage that it is possible to ignite the igniter 21 in response to a bidirectional short-circuit current. This point will be described below.

[0089] As shown in FIG. 10 , the circuit breaker system 5B including the circuit breaker device 4B of the reference example has a configuration basically similar to that of the circuit breaker system 5 of the present embodiment (see FIG. 8 ). However, in the circuit breaker device 4B of the reference example, the detection unit 1B does not include the full-wave rectifier circuit 12, the second resistor 132, and the diode 180, but instead includes a rectifier element (diode) 12B. Specifically, as shown in FIG. 10 , in the circuit breaker system 5B of the reference example, the diode 12B is electrically connected between both ends of the coil 11. Note that in the circuit breaker device 4B and the circuit breaker system 5B of the reference example, components similar to those of the circuit breaker device 4 and the circuit breaker system 5 of the present embodiment are denoted by the same reference numerals and their descriptions are omitted where appropriate. Also, in FIG. 10 , as in FIG. 9 , components other than the igniter 21 of the circuit breaker unit 2 are not shown.

[0090] In the circuit breaker 4B of the reference example, for example, when a short-circuit current flows in the bus bar 9 in a positive direction (the direction of the arrow of current Ib in FIG. 10 ), the coil 11 generates an induced current Ic in a positive direction (the direction of the arrow of current Ic in FIG. 10 ) (see the middle part of FIG. 11 ). In this case, the positive induced current Ic generated in the coil 11 flows (clockwise in FIG. 10 ) through a closed circuit including the coil 11 and the first resistor 131. Then, the first switching element 15 is turned on by the voltage across the first resistor 131 caused by the current Ir flowing through the first resistor 131. Furthermore, the voltage across the capacitor 14 turns on the second switching element 16, causing the current Id to flow out of the detection-side first connection terminal 171 (the direction of the arrow of current Id in FIG. 10 ).

[0091] On the other hand, in the circuit breaker 4B of the reference example, for example, when a short-circuit current flows in the bus bar 9 in the negative direction (opposite to the arrow of current Ib in FIG. 10 ), the coil 11 generates an induced current Ic in the negative direction (opposite to the arrow of current Ic in FIG. 10 ) (see the middle part of FIG. 12 ). In this case, the negative induced current Ic generated in the coil 11 flows (counterclockwise in FIG. 10 ) through a closed circuit including the coil 11 and the parallel circuit of the diode 12B and the first resistor 131. At this time, most of the negative induced current Ic flows through the diode 12B, which has a relatively low resistance, rather than through the first resistor 131, which has a relatively high resistance. Therefore, the magnitude of the current Ir flowing through the first resistor 131 (see the bottom part of FIG. 12 ) is smaller than the current Ir in the case of a positive induced current Ic (see the bottom part of FIG. 11 ). Therefore, in the circuit breaker 4B of the reference example, even if a short-circuit current flows in the bus bar 9 in the negative direction, the first switching element 15 is not turned on, and the current Id is not supplied to the igniter 21 from the detection unit 1B.

[0092] In contrast to this, as described in the section "(1.2) Operation of Circuit Breaker," the circuit breaker 4 of this embodiment can supply the current Id from the detection unit 1 to the igniter 21 regardless of the direction of the short-circuit current flowing through the bus bar 9 (whether the direction is positive or negative). Therefore, it becomes possible to ignite the igniter 21 in response to a short-circuit current flowing through the bus bar 9 in both directions.

[0093] In particular, when the bus bar 9 of the circuit breaker 4 is connected to the power supply path of a storage battery that can be charged and discharged, the direction of the short-circuit current generated during discharging and the direction of the short-circuit current generated during charging may be opposite to each other. Therefore, by making the igniter 21 operable for short-circuit currents in both directions, it becomes possible to operate the igniter 21 not only for short-circuit currents generated during discharging but also for short-circuit currents generated during charging. This makes it possible to improve the reliability of the operation of the igniter 21.

[0094] (1.4.2) Advantages of the First and Second Switching Elements As described above, in the breaking device 4 of this embodiment, the detection unit 1 includes the first switching element 15 and the second switching element 16. The advantages thereof will be described below.

[0095] (1.4.2.1) Advantages of the First Switching Element In the detection unit 1, as described above, the first switching element 15 is electrically connected to the full-wave rectifier circuit 12.

[0096] In the detection unit 1, the current Ib flowing through the bus bar 9 may fluctuate due to, for example, small noise, causing the coil 11 to generate an induced current Ic.

[0097] However, when the magnitude of the induced current Ic is small, the voltage generated across the first resistor 131 is small, and the voltage applied to the first switching element 15 does not exceed the first value. Therefore, the first switching element 15 is maintained in the off state, and the capacitor 14 is not charged.

[0098] That is, the detection unit 1 of this embodiment includes the first switching element 15, which prevents the capacitor 14 from being unintentionally charged by the small induced current Ic, thereby preventing the current Id from being unintentionally supplied to the igniter 21.

[0099] The electrical energy of the induced current Ic generated by the coil 11 is converted into heat by the second resistor 132, the first resistor 131, etc., and is consumed.

[0100] (1.4.2.2) Advantages of the Second Switching Element In the detection unit 1, as described above, the second switching element 16 is electrically connected to the first switching element 15.

[0101] Here, in the detection unit 1, if the current Ib flowing through the bus bar 9 changes significantly, for example, due to loud noise, the voltage applied to the first switching element 15 may become equal to or greater than the first value, causing the first switching element 15 to be turned on.

[0102] However, if the change in current Ib flowing through bus bar 9 lasts for a short period of time, such as in the case of noise, sufficient charge will not be accumulated in capacitor 14 even if first switching element 15 is turned on. Therefore, the voltage applied to second switching element 16 does not exceed the second value, and second switching element 16 is maintained in the off state.

[0103] That is, the detection unit 1 of this embodiment includes the second switching element 16, which prevents the current Id from being unintentionally supplied to the igniter 21 due to the influence of noise or the like.

[0104] The electric energy of the charge stored in the capacitor 14 is converted into heat by the third resistor 133 and the like and consumed.

[0105] (1.5) Vehicle As described above, the shutoff device 4 is mounted on, for example, a vehicle 6 as an object. The vehicle 6 may be, for example, an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, or the like.

[0106] As shown in FIG. 13 , the vehicle 6 includes the circuit breaking device 4 (detection unit 1 and circuit breaking unit 2 ), a battery 61 , a motor 62 , a bus bar 9 , a control unit 30 , and a sensor 63 .

[0107] The bus bar 9 is electrically connected to the battery 61. The motor 62 is electrically connected to the battery 61 via the bus bar 9. The bus bar 9 is passed through, for example, a through hole 190 in the housing 19 of the detection unit 1, and faces the inner surface 103 of the core 10 (see FIG. 4 ).

[0108] The control unit 30 is provided in, for example, the ECU 64 of the vehicle 6. The control unit 30 is connected in parallel with the full-wave rectifier circuit 12 when viewed from the igniter 21. The control unit 30 can supply a current Ia to the igniter 21 without relying on the power generated by the coil 11 to ignite the explosive 214. The sensor 63 is also electrically connected to the control unit 30.

[0109] In the vehicle 6, when an overcurrent flows between the battery 61 and the motor 62 (i.e., the bus bar 9), the explosive 214 is ignited by the electric power generated by the coil 11 of the circuit breaker 4. The overcurrent is a current that exceeds the current allowed to flow through the bus bar 9, such as a short-circuit current.

[0110] Furthermore, in the vehicle 6, for example, when the ECU 64 (control unit 30) determines that an abnormality has occurred in the vehicle 6 based on the detection result of the sensor 63, the explosive 214 is ignited by the current Ia supplied from the control unit 30. In this embodiment, the abnormality in the vehicle 6 may be an accident of the vehicle 6. The abnormality in the vehicle 6 may include, for example, an abnormal temperature at a specific location on the vehicle, abnormal behavior of the motor 62, an impact, a ground fault, etc. Furthermore, the sensor 63 may include any sensor for detecting an abnormality in the vehicle 6. For example, the sensor 63 may include a temperature sensor for detecting the temperature at a specific location on the vehicle 6. For example, the sensor 63 may include a sensor for detecting abnormal behavior of the motor 62. The sensor 63 may include an impact sensor for detecting the occurrence of an accident or the like by detecting an impact (acceleration) applied to the body of the vehicle 6. The sensor 63 may include a current sensor for detecting the occurrence of a ground fault in an electric circuit including the bus bar 9. The sensor 63 may include a current sensor for detecting an overcurrent (short-circuit current, etc.) in the electric circuit including the bus bar 9.

[0111] Then, the projectile 22 of the breaking unit 2 of the breaking device 4 moves toward the bus bar 9 (here, the conductor 23) in response to the ignition of the explosive 214, thereby breaking the electrical connection between the battery 61 and the motor 62.

[0112] 13 , in the vehicle 6 of this embodiment, the bus bar 9 (conductor 23) has a movable portion 231 that faces the projectile 22 and a fixed portion 232 against which the movable portion 231 is pressed. The projectile 22 moves in response to the ignition of the explosive 214, and presses the movable portion 231 in a direction in which the movable portion 231 moves away from the fixed portion 232. In other words, in this embodiment, the bus bar 9 is not broken by the projectile 22, but is pushed by the projectile 22 so that the movable portion 231 moves away from the fixed portion 232, thereby interrupting the electrical circuit including the bus bar 9.

[0113] 14 , the electric vehicle as the vehicle 6 includes the circuit breaker 4, a battery 61, a motor 62, a current sensor 631 as the sensor 63, and an ECU 64 as the control unit 3. The electric vehicle as the vehicle 6 further includes an inverter 65, a main relay 66, a pre-charge resistor 67, a pre-charge relay 68, and a pre-charge capacitor 69.

[0114] The motor 62 is, for example, a three-phase AC synchronous motor. The battery 61 includes a plurality of battery cells connected in series. The battery cells may be, for example, nickel-metal hydride battery cells, lithium-ion battery cells, etc. The inverter 65 converts DC power supplied from the battery 61 into AC power and supplies it to the motor 62 during power running, and converts AC power supplied from the motor 62 into DC power and supplies it to the battery 61 during regeneration.

[0115] The main relay 66 and the current sensor 631 are provided in a current supply path from the battery 61 to the motor 62. A series circuit of the pre-charge resistor 67 and the pre-charge relay 68 is connected in parallel with the main relay 66. Note that the vehicle 6 may be provided with a second main relay connected to a low-potential side electric circuit in addition to the main relay 66 (first main relay) connected to a high-potential side electric circuit.

[0116] The ECU 64 controls the operation of the main relay 66 and the pre-charge relay 68. When the supply of power to the motor 62 starts, the ECU 64 closes the pre-charge relay 68 to charge the pre-charge capacitor 69, thereby suppressing inrush current to the motor 62. After charging of the pre-charge capacitor 69 is completed, the ECU 64 opens the pre-charge relay 68 and closes the main relay 66 to start the supply of power from the battery 61 to the motor 62.

[0117] Furthermore, when the ECU 64 (control unit 3) detects an abnormality in the vehicle 6 using the sensor 63, it supplies a current to the igniter 21 to ignite the explosives 214. For example, when the ECU 64 detects a short-circuit current using the current sensor 631, it determines that an accident has occurred in the vehicle 6 and supplies a current Ia to the igniter 21. This causes the circuit to be cut off by the breaker unit 2, and the supply of power from the battery 61 to the motor 62 is stopped.

[0118] Furthermore, the detection unit 1 of the circuit breaker 4, independently of the ECU 64, supplies a current Id to the igniter 21 when an overcurrent flows through the bus bar 9, igniting the explosive 214. This causes the circuit breaker unit 2 to break the electrical path, and the supply of power from the battery 61 to the motor 62 is stopped.

[0119] According to the vehicle 6 of this embodiment, both the detection unit 1 and the ECU 64 can detect the occurrence of an abnormality (e.g., an accident) in the vehicle 6 and activate the igniter 21. Therefore, for example, when the amount of power generated by the coil 11 is insufficient to ignite the explosive 214 or when the ignition of the explosive 214 using the power generated by the coil 11 fails, the explosive 214 can be ignited by the ECU 64. Furthermore, even if a break or the like occurs in the electrical path between the ECU 64 and the igniter 21, the detection unit 1 can ignite the explosive 214. In short, according to the vehicle 6 of this embodiment, it is possible to improve the reliability of the operation of the igniter 21.

[0120] (2) Modifications The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the embodiment are listed below. The above embodiment and the modifications described below can be applied in appropriate combinations. In the following description of each modification, the description of the same configuration as the above embodiment may be omitted as appropriate.

[0121] The shutdown system 5 of the present disclosure includes a computer system, such as the control unit 30. The computer system is primarily composed of a processor and memory as hardware. The processor executes a program stored in the memory of the computer system to realize the functions of the control unit 30 of the present disclosure. The program may be pre-recorded in the memory of the computer system, provided via a telecommunications line, or provided in a non-transitory recording medium readable by the computer system, such as a memory card, optical disk, or hard disk drive. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits, such as ICs and LSIs, are referred to by different names depending on the degree of integration, and include integrated circuits called system LSIs, very large-scale integrations (VLSIs), or ultra-large-scale integrations (ULSIs). Furthermore, field-programmable gate arrays (FPGAs), which are programmed after the LSI is manufactured, or logic devices capable of reconfiguring the connections within the LSI or the circuit partitions within the LSI, can also be used as processors. The electronic circuits may be integrated into one chip or distributed across multiple chips. The chips may be integrated into one device or distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0122] Furthermore, it is not essential that the multiple functions of the control unit 30 be concentrated in one housing. The components of the control unit 30 may be distributed across multiple housings. Conversely, the multiple functions of the control unit 30 may be concentrated in one housing. Furthermore, at least some of the functions of the control unit 30 may be realized by the cloud (cloud computing) or the like.

[0123] (2.1) Modification 1 In the detection unit 1, the first switching element 15 may include a unidirectional thyristor 153. For example, as shown in FIG. 15A , the anode of the unidirectional thyristor 153 is electrically connected to the first terminal 151 of the first switching element 15, and the cathode of the unidirectional thyristor 153 is electrically connected to the second terminal 152 of the first switching element 15.

[0124] 15A , the first switching element 15 further includes a diode 154, a Zener diode 155, a resistor 156, and a capacitor 157. A series circuit of the diode 154 and the Zener diode 155 is electrically connected between the anode and gate of the unidirectional thyristor 153. The cathodes of the diode 154 and the Zener diode 155 are electrically connected to each other. A parallel circuit of the resistor 156 and the capacitor 157 is electrically connected between the gate and cathode of the unidirectional thyristor 153.

[0125] 15B , the second switching element 16 may include a unidirectional thyristor 163. For example, as shown in FIG. 15B , the anode of the unidirectional thyristor 163 is electrically connected to the third terminal 161 of the second switching element 16, and the cathode of the unidirectional thyristor 163 is electrically connected to the fourth terminal 162 of the second switching element 16.

[0126] 15B , the second switching element 16 further includes a diode 164, a Zener diode 165, a resistor 166, and a capacitor 167. A series circuit of the diode 164 and the Zener diode 165 is electrically connected between the anode and gate of the unidirectional thyristor 163. The cathodes of the diode 164 and the Zener diode 165 are electrically connected to each other. A parallel circuit of the resistor 166 and the capacitor 167 is electrically connected between the gate and cathode of the unidirectional thyristor 163.

[0127] When at least one of the first switching element 15 and the second switching element 16 includes a unidirectional thyristor, the detection unit 1 of the circuit breaker 4 does not need to include a rectifying element (diode 180). This is because the unidirectional thyristor 153 (or 163) can prevent the current Ia from the control unit 3 from flowing into the detection unit 1.

[0128] The shutdown device 4 and shutdown system 5 of this modified example also make it possible to improve the reliability of the operation of the igniter 21.

[0129] 16, in this modification, the capacitor 14 is omitted from the detection unit 1. Furthermore, in the detection unit 1, the third resistor 133 and the second switching element 16 are also omitted.

[0130] In the circuit breaker 4 of this modified example, when the current Ir, which is generated after the induced current Ic passes through the full-wave rectifier circuit 12, flows through the first resistor 131, turning on the first switching element 15, a current Id is supplied from the detection unit 1 to the igniter 21. For example, if the number of turns of the coil 11 is relatively large and a current Id sufficient to burn the explosive 214 can be supplied to the igniter 21 without storing an electric charge in the capacitor 14, the capacitor 14 can be omitted.

[0131] The shutdown device 4 of this modified example and the shutdown system 5 including the same can also improve the reliability of the operation of the igniter 21.

[0132] In the circuit breaker 4 of this modified example, the full-wave rectifier circuit 12 may be omitted.

[0133] (2.3) Modifications 3 to 6 The connection relationship between the detection unit 1, the interrupter unit 2, and the control unit 3 is not limited to the connection relationship using a branch cable having the first electric wire 71 to the fourth electric wire 74 as shown in FIG.

[0134] (2.3.1) Modification 3 In the interruption system 5 of this modification, as shown in Fig. 17 , the detection unit 1 further includes a detection-side third connection terminal 173. The detection-side third connection terminal 173 is electrically connected to the detection-side first connection terminal 171 inside the housing 19 (for example, on the substrate 18). The detection-side third connection terminal 173 is also exposed from the housing 19. The rectifying element (diode) 180 is not shown in Fig. 17 .

[0135] 17 , the detection-side first connection terminal 171 is electrically connected to the first end 211 of the igniter 21 via the first electric wire 71. The detection-side second connection terminal 172 is electrically connected to the second end 212 of the igniter 21 via the second electric wire 72, and is electrically connected to the control-side second connection terminal 312 via the second electric wire 72 and the fourth electric wire 74. The detection-side third connection terminal 173 is electrically connected to the control-side first connection terminal 311 via the fifth electric wire 75.

[0136] As described above, in the shutdown system 5 of this modified example, the detection unit 1 has a housing 19, a first connection terminal (detection-side first connection terminal 171), and a second connection terminal (detection-side third connection terminal 173). The first connection terminal (detection-side first connection terminal 171) is exposed from the housing 19 and is electrically connected to the igniter 21. The second connection terminal (detection-side third connection terminal 173) is electrically connected to the first connection terminal (detection-side first connection terminal 171), is exposed from the housing 19, and is electrically connected to the control unit 30.

[0137] According to this modification, it is possible to simplify the connection relationships in the configuration of the shutdown system 5.

[0138] The detection-side third connection terminal 173 may be electrically connected to the detection-side second connection terminal 172 instead of the detection-side first connection terminal 171. In this case, the detection-side first connection terminal 171 and the control-side first connection terminal 311 may be electrically connected to the first end 211 of the igniter 21, the detection-side second connection terminal 172 may be electrically connected to the second end 212 of the igniter 21, and the detection-side third connection terminal 173 may be electrically connected to the control-side second connection terminal 312.

[0139] (2.3.2) Modification 4 In the interruption system 5 of this modification, as shown in Fig. 18 , the detection unit 1 further includes a detection-side third connection terminal 173 and a detection-side fourth connection terminal 174. The detection-side third connection terminal 173 is electrically connected to the detection-side first connection terminal 171 inside the housing 19 (e.g., on the substrate 18). The detection-side fourth connection terminal 174 is electrically connected to the detection-side second connection terminal 172 inside the housing 19 (e.g., on the substrate 18). The detection-side third connection terminal 173 and the detection-side fourth connection terminal 174 are also exposed from the housing 19. The rectifying element (diode) 180 is not shown in Fig. 18 .

[0140] 18 , the detection-side first connection terminal 171 is electrically connected to the first end 211 of the igniter 21 via the first electric wire 71, and the detection-side second connection terminal 172 is electrically connected to the second end 212 of the igniter 21 via the second electric wire 72. The detection-side third connection terminal 173 is electrically connected to the control-side first connection terminal 311 via the fifth electric wire 75, and the detection-side fourth connection terminal 174 is electrically connected to the control-side second connection terminal 312 via the sixth electric wire 76.

[0141] As in the third modification, in the interruption system 5 of this modification, the detection unit 1 has a housing 19, a first connection terminal (detection-side first connection terminal 171), and a second connection terminal (detection-side third connection terminal 173). The first connection terminal (detection-side first connection terminal 171) is exposed from the housing 19 and is electrically connected to the igniter 21. The second connection terminal (detection-side third connection terminal 173) is electrically connected to the first connection terminal (detection-side first connection terminal 171), is exposed from the housing 19, and is electrically connected to the control unit 30.

[0142] According to this modification, it is possible to simplify the connection relationships in the configuration of the shutdown system 5.

[0143] Furthermore, in the interruption system 5 of this modified example, for example, the connector 17 (first connector) having the detection-side first connection terminal 171 and the detection-side second connection terminal 172 is electrically connected to the igniter 21 via a first cable having the first electric wire 71 and the second electric wire 72, and the connector 170 (second connector) having the detection-side third connection terminal 173 and the detection-side fourth connection terminal 174 is electrically connected to the connector 31 of the control unit 3 via a second cable having the fifth electric wire 75 and the sixth electric wire 76, thereby configuring the interruption system 5. In other words, there is no need to use a branch cable as in the example of FIG. 8 . This can simplify the connection relationships in the configuration of the interruption system 5.

[0144] 19 , in the interruption system 5 of this modification, the control unit 3 has a control-side third connection terminal 313. The control-side third connection terminal 313 is electrically connected to the control-side first connection terminal 311 inside the housing 32 (for example, on a board provided in the control unit 30). The control-side third connection terminal 313 is also exposed from the housing 32.

[0145] 19 , the control-side first connection terminal 311 is electrically connected to the detection-side first connection terminal 171 via the fifth electric wire 75. The control-side second connection terminal 312 is electrically connected to the second end 212 of the igniter 21 and the detection-side second connection terminal 172 via the second electric wire 72 and the fourth electric wire 74. The control-side third connection terminal 313 is electrically connected to the first end 211 of the igniter 21 via the seventh electric wire 77.

[0146] As described above, in the shutdown system 5 of this modified example, the control unit 3 has a housing 32, a first connection terminal (control-side first connection terminal 311), and a second connection terminal (control-side third connection terminal 313). The first connection terminal (control-side first connection terminal 311) is exposed from the housing 32 and is electrically connected to the detection unit 1. The second connection terminal (control-side third connection terminal 313) is electrically connected to the first connection terminal (control-side first connection terminal 311), is exposed from the housing 32, and is electrically connected to the igniter 21.

[0147] According to this modification, it is possible to simplify the connection relationships in the configuration of the shutdown system 5.

[0148] The control-side third connection terminal 313 may be electrically connected to the control-side second connection terminal 312 instead of the control-side first connection terminal 311. In this case, the control-side first connection terminal 311 and the detection-side first connection terminal 171 may be electrically connected to the first end 211 of the igniter 21, the control-side second connection terminal 312 may be electrically connected to the second end 212 of the igniter 21, and the control-side third connection terminal 313 may be electrically connected to the detection-side second connection terminal 172.

[0149] (2.3.4) Modification 6 In the interruption system 5 of this modification, as shown in Fig. 20 , the control unit 3 further includes a control-side third connection terminal 313 and a control-side fourth connection terminal 314. The control-side third connection terminal 313 is electrically connected to the control-side first connection terminal 311 inside the housing 32 (for example, on a board provided in the control unit 30). The control-side fourth connection terminal 314 is electrically connected to the control-side second connection terminal 312 inside the housing 32 (for example, on a board provided in the control unit 30). The control-side third connection terminal 313 and the control-side fourth connection terminal 314 are also exposed from the housing 32.

[0150] 20 , the first control-side connection terminal 311 is electrically connected to the first detection-side connection terminal 171 via the fifth electric wire 75, and the second control-side connection terminal 312 is electrically connected to the second detection-side connection terminal 172 via the sixth electric wire 76. The third control-side connection terminal 313 is electrically connected to the first end 211 of the igniter 21 via the seventh electric wire 77, and the fourth control-side connection terminal 314 is electrically connected to the second end 212 of the igniter 21 via the eighth electric wire 78.

[0151] As in the fifth modified example, in the interruption system 5 of this modified example, the control unit 3 has a housing 32, a first connection terminal (control-side first connection terminal 311), and a second connection terminal (control-side third connection terminal 313). The first connection terminal (control-side first connection terminal 311) is exposed from the housing 32 and is electrically connected to the detection unit 1. The second connection terminal (control-side third connection terminal 313) is electrically connected to the first connection terminal (control-side first connection terminal 311), is exposed from the housing 32, and is electrically connected to the igniter 21.

[0152] According to this modification, it is possible to simplify the connection relationships in the configuration of the shutdown system 5.

[0153] Furthermore, in the interruption system 5 of this modified example, for example, the connector 31 (first connector) having the first control-side connection terminal 311 and the second control-side connection terminal 312 is electrically connected to the connector 17 of the detection unit 1 via a first cable having the fifth electric wire 75 and the sixth electric wire 76, and the connector 310 (second connector) having the third control-side connection terminal 313 and the fourth control-side connection terminal 314 is electrically connected to the igniter 21 via a second cable having the seventh electric wire 77 and the eighth electric wire 78, thereby configuring the interruption system 5. In other words, there is no need to use a branch cable as in the example of FIG. 8 . This can simplify the connection relationships in the configuration of the interruption system 5.

[0154] (2.4) Other Modifications In one modification, the detection unit 1 may include only either the first switching element 15 or the second switching element 16. Furthermore, both the first switching element 15 and the second switching element 16 may be omitted from the detection unit 1. When both the first switching element 15 and the second switching element 16 are omitted, a rectifying element (diode) may be disposed in the position of the first switching element 15 or the second switching element 16. The first resistor 131 and the third resistor 133 may be omitted as appropriate depending on whether the first switching element 15 and / or the second switching element 16 is omitted.

[0155] In one modification, at least one of the first switching element 15 and the second switching element 16 may be a switching element other than a sidac, such as a diac.

[0156] In one variation, the second value may be greater than the first value.

[0157] In one modified example, a recess may be formed in the housing 19 of the detection unit 1 instead of the through-hole 190. The recess may be formed, for example, in the shape of a groove extending in the front-to-rear direction on the lower surface of the housing 19. In this case, the core 10 may be provided in the housing 19 so as to surround the recess. For example, the core 10 may be disposed inside the housing 19 so as to surround the recess from three sides: the upper side, left side, and right side.

[0158] In one modification, the rectifying element (diode) 180 may be electrically connected between the second terminal 152 of the first switching element 15 and the third terminal 161 of the second switching element 16. In another modification, the rectifying element (diode) 180 may be provided outside the housing 19 of the detection unit 1. For example, the anode of the diode 180 may be electrically connected to the detection-side first connection terminal 171, and the cathode may be electrically connected to the control-side first connection terminal 311 of the control unit 3 and the first end 211 of the igniter 21.

[0159] In one variant, the disconnecting device 4 may be used alone without the control unit 3 being connected.

[0160] (3) Aspects As is clear from the above-described embodiments and modifications, the present specification discloses the following aspects.

[0161] The first aspect of the interrupter device (4) includes a detection unit (1) and an interrupter unit (2). The interrupter unit (2) is electrically connected to the detection unit (1). The detection unit (1) includes a core (10), a coil (11), and a full-wave rectifier circuit (12). The core (10) is formed of a magnetic material. The coil (11) is wound around the core (10). The full-wave rectifier circuit (12) is electrically connected to the coil (11). The interrupter unit (2) includes an igniter (21) and a projectile (22). The igniter (21) includes explosives (214). The igniter (21) is electrically connected to the full-wave rectifier circuit (12). The igniter (21) is configured to be able to ignite the explosives (214) using the power generated by the coil (11). The projectile (22) moves in response to ignition of the explosive (214).

[0162] According to this aspect, it is possible to improve the reliability of the operation of the igniter (21).

[0163] In the second aspect of the circuit breaker (4), the detection unit (1) of the first aspect further includes a first switching element (15). The first switching element (15) includes a first terminal (151) and a second terminal (152). The first terminal (151) is electrically connected to the full-wave rectifier circuit (12). The second terminal (152) is electrically connected to the igniter (21). When a voltage equal to or greater than a first value is applied to the first switching element (15), the first switching element (15) causes a current to flow from the first terminal (151) to the second terminal (152).

[0164] According to this aspect, it is possible to prevent the current (Id) from being unintentionally supplied to the igniter (21).

[0165] In the circuit breaker (4) of the third aspect, the first switching element (15) in the second aspect includes a unidirectional thyristor (153) or a bidirectional thyristor.

[0166] According to this aspect, the first switching element (15) can be realized with a simple configuration.

[0167] In the fourth aspect of the interrupter (4), in the second or third aspect, the detection unit (1) further includes a second switching element (16). The second switching element (16) includes a third terminal (161) and a fourth terminal (162). The third terminal (161) is electrically connected to the first switching element (15). The fourth terminal (162) is electrically connected to the igniter (21). When a voltage equal to or greater than a second value is applied to the second switching element (16), the second switching element (16) causes a current to flow from the third terminal (161) to the fourth terminal (162).

[0168] According to this aspect, it is possible to prevent the current (Id) from being unintentionally supplied to the igniter (21).

[0169] In the shutoff device (4) of the fifth aspect, in the fourth aspect, the second value is the same as or greater than the first value.

[0170] According to this aspect, it is possible to prevent the current (Id) from being unintentionally supplied to the igniter (21).

[0171] In the circuit breaker (4) of the sixth aspect, in the fourth or fifth aspect, the second switching element (16) includes a unidirectional thyristor (153) or a bidirectional thyristor.

[0172] According to this aspect, the second switching element (16) can be realized with a simple configuration.

[0173] In the seventh aspect of the blocking device (4), in any one of the first to sixth aspects, the detection unit (1) further includes a housing (19) having a recess or a through-hole (190). The core (10) is provided in the housing (19) so as to surround the recess or the through-hole (190).

[0174] According to this aspect, the bus bar (9) and the coil (11) can be magnetically coupled simply by placing the bus bar (9) in the recess or through hole (190).

[0175] The shutoff device (4) of an eighth aspect is the shutoff device (4) of any one of the first to seventh aspects, further comprising a bus bar (9). The core (10) includes an inner surface (103) facing the bus bar (9). The projectile (22) moves toward the bus bar (9) in response to ignition of the explosive (214).

[0176] According to this aspect, the projectile (22) can interrupt the electrical path formed by the bus bar (9) in response to a change in the current (Ib) flowing through the bus bar (9).

[0177] A shutoff system (5) of a ninth aspect includes the shutoff device (4) of any one of the first to eighth aspects and a control unit (30). The control unit (30) is connected in parallel with the full-wave rectifier circuit (12) when viewed from the igniter (21). The control unit (30) controls the supply of current (Ia) to the igniter (21). The supplied current (Ia) can ignite the explosive (214).

[0178] According to this aspect, it is possible to improve the reliability of the operation of the igniter (21).

[0179] In the shutoff system (5) of the tenth aspect, in the ninth aspect, the detection unit (1) further includes a housing (19), a first connection terminal (detection-side first connection terminal 171), and a second connection terminal (detection-side third connection terminal 173). The first connection terminal (detection-side first connection terminal 171) is exposed from the housing (19) and is electrically connected to the igniter (21). The second connection terminal (detection-side third connection terminal 173) is electrically connected to the first connection terminal (detection-side first connection terminal 171), is exposed from the housing (19), and is electrically connected to the control unit (30).

[0180] According to this aspect, it is possible to simplify the connection relationships in the configuration of the interruption system (5).

[0181] The shutoff system (5) of an eleventh aspect is the same as that of the ninth aspect, and includes a control unit (3). The control unit (3) has a control unit (30) and a housing (32) that holds or houses the control unit (30). The control unit (3) further has a first connection terminal (control-side first connection terminal 311) and a second connection terminal (control-side third connection terminal 313). The first connection terminal (control-side first connection terminal 311) is exposed from the housing (32) and electrically connected to the detection unit (1). The second connection terminal (control-side third connection terminal 313) is electrically connected to the first connection terminal (control-side first connection terminal 311), is exposed from the housing (32), and is electrically connected to the igniter (21).

[0182] According to this aspect, it is possible to simplify the connection relationships in the configuration of the interruption system (5).

[0183] A twelfth aspect of the invention relates to an interruption system (5) including the interruption device (4) of the first aspect and a control unit (30). The control unit (30) is connected in parallel with the full-wave rectifier circuit (12) when viewed from the igniter (21). The control unit (30) controls the supply of current (Ia) to the igniter (21). The supplied current (Ia) can ignite the explosive (214). The interruption device (4) further includes a switching element (first switching element 15). The switching element (first switching element 15) includes a first terminal (151) and a second terminal (152). The first terminal (151) is electrically connected to the full-wave rectifier circuit (12). The second terminal (152) is electrically connected to the igniter (21). When a voltage equal to or greater than a first value is applied to the switching element (first switching element 15), the switching element (first switching element 15) causes a current to flow from a first terminal (151) to a second terminal (152). The switching element (first switching element 15) includes a bidirectional thyristor. The interruption system (5) further includes a rectifying element (diode 180). The rectifying element (diode 180) includes an anode electrically connected to the second terminal (152) of the switching element (first switching element 15) and a cathode electrically connected to the control unit (30).

[0184] According to this aspect, it is possible to prevent a situation in which current is unintentionally supplied to the igniter (21).

[0185] A vehicle (6) of a thirteenth aspect includes the circuit breaker (4) of any one of the first to seventh aspects, a battery (61), a bus bar (9), a control unit (30), a sensor (63), and a motor (62). The bus bar (9) is electrically connected to the battery (61). The bus bar (9) faces the inner surface of the core (10). The control unit (30) is connected in parallel with the full-wave rectifier circuit (12) as viewed from the igniter (21). The control unit (30) controls the supply of current (Ia) to the igniter (21), and the supplied current (Ia) can ignite the explosive (214). The sensor (63) is electrically connected to the control unit (30). The motor (62) is electrically connected to the battery (61) via the bus bar (9). In the vehicle (6), when an overcurrent flows between the battery (61) and the motor (62), the explosive (214) is ignited by the electric power generated by the coil (11) of the interrupter (4). In the vehicle (6), when it is determined that an abnormality has occurred in the vehicle (6) based on the detection result of the sensor (63), the control unit (30) controls the supply of an electric current (Ia) to the igniter (21), and the explosive (214) is ignited by the supplied electric current (Ia). The projectile (22) is configured to move toward the bus bar (9) in response to the ignition of the explosive (214) and cut off the electrical connection between the battery (61) and the motor (62).

[0186] According to this aspect, it is possible to improve the reliability of the operation of the igniter (21) of the cutoff device (4) provided in the vehicle (6).

[0187] A vehicle (6) of a 14th aspect is the 13th aspect, wherein the bus bar (9) has a movable part (231) facing the projectile (22) and a fixed part (232) against which the movable part (231) is pressed. The projectile (22) moves in response to ignition of the explosive (214) and presses the movable part (231) in a direction away from the fixed part (232).

[0188] According to this aspect, the movable part (231) is pushed by the ejection body (22) and moves away from the fixed part (232), thereby making it possible to break an electric circuit including the bus bar (9).

[0189] A detection unit (1) of a fifteenth aspect includes a core (10), a coil (11), a full-wave rectifier circuit (12), and a first switching element (15). The core (10) is formed of a magnetic material. The coil (11) is wound around the core (10). The full-wave rectifier circuit (12) is electrically connected to the coil (11). The first switching element (15) includes a first terminal (151) and a second terminal (152). The first terminal (151) is electrically connected to the full-wave rectifier circuit (12). The second terminal (152) is electrically connected to the igniter (21). When a voltage equal to or greater than a first value is applied to the first switching element (15), the first switching element (15) causes a current to flow from the first terminal (151) to the second terminal (152).

[0190] According to this aspect, it is possible to improve the reliability of the operation of the igniter (21).

[0191] 1 Detection unit 10 Core 103 Inner surface 11 Coil 12 Full-wave rectifier circuit 14 Capacitor 15 First switching element 151 First terminal 152 Second terminal 153 Unidirectional thyristor 16 Second switching element 161 Third terminal 162 Fourth terminal 163 Unidirectional thyristor 17 Connector 171 Detection side first connection terminal (first connection terminal) 173 Detection side third connection terminal (second connection terminal) 180 Rectifier element (diode) 19 Housing 190 Through hole 2 Breaker unit 21 Igniter 214 Explosive powder 22 Projectile 231 Movable part 232 Fixed part 3 Control unit 30 Control part 311 Control side first connection terminal (first connection terminal) 313 Control side third connection terminal (second connection terminal) 32 Housing 4 Breaker device 5 Breaker system 6 Vehicle 61 Battery 62 Motor 63 Sensor 9 Bus bar Ia Current

Claims

1. An interrupting device comprising: a detection unit; and an interrupting unit electrically connected to the detection unit, wherein the detection unit has a core made of a magnetic material, a coil wound around the core, and a full-wave rectifying circuit electrically connected to the coil, and the interrupting unit has: an igniter including explosives, electrically connected to the full-wave rectifying circuit, and configured to be able to ignite the explosives with electric power generated by the coil; and a projectile that moves in response to the ignition of the explosives.

2. The circuit breaker according to claim 1, wherein the detection unit further has a first switching element, the first switching element including a first terminal electrically connected to the full-wave rectifier circuit and a second terminal electrically connected to the igniter, and causing a current to flow from the first terminal to the second terminal when a voltage equal to or greater than a first value is applied.

3. The circuit breaker according to claim 2, wherein the first switching element includes a unidirectional thyristor or a bidirectional thyristor.

4. The circuit breaker according to claim 2 or 3, wherein the detection unit further has a second switching element, the second switching element including a third terminal electrically connected to the first switching element and a fourth terminal electrically connected to the igniter, and when a voltage of a second value or greater is applied, causes a current to flow from the third terminal to the fourth terminal.

5. The interrupter device according to claim 4, wherein the second value is equal to or greater than the first value.

6. The circuit breaker according to claim 4 or 5, wherein the second switching element includes a unidirectional thyristor or a bidirectional thyristor.

7. The interrupter device according to any one of claims 1 to 6, wherein the detection unit further has a housing in which a recess or a through hole is formed, and the core is provided in the housing so as to surround the recess or the through hole.

8. The interrupter according to any one of claims 1 to 7, further comprising a bus bar, the core including an inner surface facing the bus bar, and the projectile moving toward the bus bar in response to ignition of the explosive.

9. An interrupter system comprising: an interrupter according to any one of claims 1 to 8; and a control unit connected in parallel with the full-wave rectifier circuit as viewed from the igniter, wherein the control unit controls the supply of current to the igniter, and the explosive can be ignited by the supplied current.

10. The shutoff system of claim 9, wherein the detection unit further comprises: a housing; a first connection terminal exposed from the housing and electrically connected to the igniter; and a second connection terminal electrically connected to the first connection terminal, exposed from the housing, and electrically connected to the control unit.

11. The interruption system as described in claim 9, further comprising a control unit having the control unit and a housing that holds or houses the control unit, the control unit further comprising: a first connection terminal exposed from the housing and electrically connected to the detection unit; and a second connection terminal electrically connected to the first connection terminal, exposed from the housing, and electrically connected to the igniter.

12. An interrupter system comprising: an interrupter as claimed in claim 1; and a control unit connected in parallel with the full-wave rectifier circuit when viewed from the igniter, wherein the control unit controls the supply of current to the igniter, and the explosive can be ignited by the supplied current, wherein the interrupter further includes a switching element including a first terminal electrically connected to the full-wave rectifier circuit and a second terminal electrically connected to the igniter, and which causes a current to flow from the first terminal to the second terminal when a voltage of a first value or more is applied thereto, wherein the switching element includes a bidirectional thyristor, and further includes a rectifier element including an anode electrically connected to the second terminal of the switching element and a cathode electrically connected to the control unit.

13. A vehicle comprising: a circuit breaker as claimed in any one of claims 1 to 7; a battery; a bus bar electrically connected to the battery and facing an inner surface of the core; a control unit connected in parallel to the full-wave rectifier circuit when viewed from the igniter; a sensor electrically connected to the control unit; and a motor electrically connected to the battery via the bus bar, wherein the control unit controls the supply of current to the igniter, such that the explosive can be ignited by the supplied power, and when an overcurrent flows between the battery and the motor, the explosive is ignited by the power generated by the coil of the circuit breaker, and when it is determined based on the detection result of the sensor that an abnormality has occurred in the vehicle, the control unit controls the supply of current to the igniter, and the explosive is ignited by the supplied current, and the projectile moves towards the bus bar in response to the ignition of the explosive, thereby cutting off the electrical connection between the battery and the motor.

14. A vehicle as claimed in claim 13, wherein the bus bar has a movable part facing the projectile and a fixed part against which the movable part is pressed, the projectile moves in response to ignition of the explosive, and presses the movable part so as to move away from the fixed part.

15. A detection unit comprising: a core formed of a magnetic material; a coil wound around the core; a full-wave rectifier circuit electrically connected to the coil; and a first switching element, wherein the first switching element includes a first terminal electrically connected to the full-wave rectifier circuit and a second terminal electrically connected to an igniter, and when a voltage equal to or greater than a first value is applied, causes a current to flow from the first terminal to the second terminal.

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