Power-off protection device and control circuit

Abstract

The present application provides a power-off protection device and a control circuit. The power-off protection device is used for cutting off an electrical connection between an input end and an output end of a conductive component. The power-off protection device comprises a housing component, an actuation component and an excitation component; a hollow cavity is formed in the housing component; the actuation component is movably accommodated in the hollow cavity, and can extend out of the hollow cavity; at least part of the excitation component is accommodated in the hollow cavity, and the excitation component is used for driving the actuation component to actuate, so that the actuation component cuts off the electrical connection between the input end and the output end of the conductive component. The power-off protection device and the control circuit provided in the present application can reduce circuit runaway and electronically-caused fire, thereby facilitating improvement of safety performance of circuits.

Description

Power failure protection device and control circuit

[0001] This application claims priority to Chinese Patent Application No. 202421732198.8, filed on July 19, 2024, entitled "Power Failure Protection Device and Control Circuit", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of power failure protection technology, and in particular relates to a power failure protection device and control circuit. Background Technology

[0003] With the rapid development of new energy vehicles, high-efficiency and high-density electric drive assembly technology has gradually matured. However, under conditions such as overload, overvoltage, excessive temperature, and external electromagnetic interference, the circuit is prone to short circuits, causing the electric drive assembly to generate high speeds and thus a huge back electromotive force, which can easily lead to circuit malfunction and fire, seriously affecting driving safety.

[0004] Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a power failure protection device and control circuit, which can reduce the occurrence of circuit runaway and electrical fire, thereby improving circuit safety performance.

[0006] On one hand, this application provides a power failure protection device for disconnecting the electrical connection between the input and output terminals of a conductive component, the power failure protection device comprising:

[0007] The housing component has a hollow cavity;

[0008] The actuating component is movably housed within the hollow cavity, and the actuating component is extendable outside the hollow cavity; and

[0009] An excitation component is at least partially housed within the hollow cavity. The excitation component is used to drive the actuating component to actuate, thereby causing the actuating component to disconnect the electrical connection between the input and output terminals of the conductive component.

[0010] In one possible implementation, the actuating component includes a first actuating element and a second actuating element; the excitation element is disposed between the first actuating element and the second actuating element; the first actuating element and the second actuating element are used to cut off the input and output terminals of at least two of the conductive components under the action of the excitation element.

[0011] In one possible implementation, the hollow cavity has a first opening and a second opening disposed opposite to each other along a first direction of the housing component; the first actuating member is received within the hollow cavity, the second actuating member is received within the hollow cavity, and the first actuating member and the second actuating member are spaced apart; the excitation member is used to drive at least a portion of the first actuating member to extend out of the first opening, and the excitation member is also used to drive at least a portion of the second actuating member to extend out of the second opening.

[0012] In one possible implementation, the triggering component includes an explosive element and a detonator, the detonator being used to detonate the explosive element, the explosive element being located between the first actuating element and the second actuating element, the explosive element being used to generate an airflow that drives the first actuating element and the second actuating element.

[0013] In one possible implementation, the triggering component further includes a fixing seat disposed within the hollow cavity, the fixing seat being used to fix the explosive component.

[0014] In one possible implementation, the power failure protection device further includes a diversion component, which is housed in the hollow cavity and located between the first and second actuators. The diversion component is used to divert the airflow generated after the explosive is detonated.

[0015] In one possible implementation, the flow-diverting component includes a first flow-diverting surface and a second flow-diverting surface, wherein the first flow-diverting surface and the second flow-diverting surface are symmetrically arranged along a second direction of the housing component, and the second direction is perpendicular to the first direction.

[0016] In one possible implementation, the power failure protection device further includes a first sealing portion disposed between the first actuating member and the inner wall of the hollow cavity; and / or, the power failure protection device further includes a second sealing portion disposed between the second actuating member and the inner wall of the hollow cavity.

[0017] In one possible implementation, the first actuating member has a first groove and a first recess, the opening of the first groove facing the second actuating member, and the first recess being disposed around the opening of the first groove; and / or, the second actuating member has a second groove and a second recess, the opening of the second groove facing the first actuating member, and the second recess being disposed around the opening of the second groove.

[0018] In one possible implementation, the housing component includes a sleeve and an outer shell, the hollow cavity being disposed inside the sleeve and the outer shell being fitted over the sleeve.

[0019] In one possible implementation, the housing component further includes an explosion-proof tube, which is sleeved outside the sleeve, and the outer shell is sleeved outside the explosion-proof tube.

[0020] In one possible implementation, the housing component further includes a pin; the housing component also has a pressure relief hole that penetrates the explosion-proof tube and the sleeve and communicates with the hollow cavity, and the pin is movably disposed in the pressure relief hole.

[0021] In one possible implementation, the housing component further includes a first limiting member, which is mounted on the sleeve and located at the first opening of the hollow cavity, and the first limiting member is used to prevent the first actuating member from falling out of the first opening of the hollow cavity; and / or, the housing component further includes a second limiting member, which is mounted on the sleeve and located at the second opening of the hollow cavity, and the second limiting member is used to prevent the second actuating member from falling out of the second opening of the hollow cavity.

[0022] In one possible implementation, the outer casing has a protruding insertion portion, through which the detonator passes, and the insertion portion is used to enable the detonator to communicate with an external detonation signal.

[0023] On the other hand, this application provides a control circuit, including:

[0024] The aforementioned power failure protection device;

[0025] Mounting bracket, the power failure protection device is mounted on the mounting bracket; and

[0026] A conductive component is mounted on the mounting base, and the power failure protection device is used to disconnect the electrical connection between the input and output terminals of the conductive component.

[0027] In one possible implementation, the conductive component includes a first conductive element, a second conductive element, and a third conductive element, all of which are mounted on the mounting base. The power-off protection device is used to disconnect at least two of the first conductive element, the second conductive element, and the third conductive element.

[0028] In one possible implementation, the power failure protection device is used to disconnect the first conductive element and the third conductive element; a first notch is provided on the first conductive element, and a second notch is provided on the third conductive element; the power failure protection device is used to disconnect the first notch position of the first conductive element and the second notch position of the third conductive element.

[0029] The power failure protection device and control circuit provided in this application drive the actuating component to operate through the excitation component inside the housing component, so that the actuating component cuts off the electrical connection between the input and output terminals of the conductive component, thereby de-energizing the circuit formed by the conductive component. This can reduce the occurrence of circuit runaway and electrical fire, and thus help improve circuit safety performance. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0031] Figure 1 is a partial structural diagram of a control circuit in a connected state according to an embodiment of this application;

[0032] Figure 2 is a partial structural diagram of a control circuit in the off state according to an embodiment of this application;

[0033] Figure 3 is a structural diagram of a power failure protection device provided in the first embodiment of this application;

[0034] Figure 4 is a cross-sectional view of the power failure protection device shown in Figure 3;

[0035] Figure 5 is a structural diagram of a power failure protection device provided in the second embodiment of this application;

[0036] Figure 6 is a cross-sectional view of the power failure protection device shown in Figure 5;

[0037] Figure 7 is a structural diagram of a power failure protection device provided in the third embodiment of this application from a first-view perspective.

[0038] Figure 8 is a structural diagram of a power failure protection device provided in the third embodiment of this application from a second perspective.

[0039] Figure 9 is a structural diagram of a power failure protection device provided in the fourth embodiment of this application from a first-view perspective.

[0040] Figure 10 is a structural diagram of a power failure protection device provided in the fourth embodiment of this application from a second perspective.

[0041] Explanation of reference numerals in the attached drawings: 10-Shell component; 11-Hollow cavity; 12-Sleeve; 13-Outer shell; 14-First limiting component; 15-Second limiting component; 16-Explosion-proof pipe; 17-Pin; 18-Pressure relief hole; 20-Actuating component; 21-First actuating component; 22-Second actuating component; 23-First sealing part; 24-Second sealing part; 30-Activation component; 31-Explosive component; 32-Detonator; 33-Fixing base; 40-Diverting component; 41-First diverting surface; 42-Second diverting surface; 100-Power failure protection device; 111-First opening; 112-Second opening; 121-Mounting hole; 131-Plug-in part; 132-First shell; 133-Second shell; 200-Mounting base; 211-First groove; 212-First recess; 221-Second groove; 222-Second recess; 300-Conductive component; 301-First conductive component; 302-Second conductive component; 303-Third conductive component; 304-First notch; 305-Second notch; 1000-Control circuit. Detailed Implementation

[0042] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0043] The following descriptions of the embodiments are based on the accompanying drawings and are used to illustrate specific embodiments in which this application can be implemented. Directional terms used in the description of this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "top surface," "side surface," "bottom surface," "top wall," "side wall," "bottom wall," "inner side wall," "outer side wall," "length direction," "width direction," and "height direction," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this application, terms such as "first," "second," "third," and "fourth" are only used to distinguish the described objects and do not have any sequential or technical meaning. In the description of this application, the terms "connection" and "linkage," unless otherwise specified, include both direct connection (linkage) and indirect connection (linkage).

[0044] Please refer to Figures 1 and 2. Figure 1 is a partial structural diagram of a control circuit in a connected state according to an embodiment of this application, and Figure 2 is a partial structural diagram of a control circuit in a disconnected state according to an embodiment of this application.

[0045] This application provides a control circuit 1000, which includes a power failure protection device 100, a mounting base 200, and a conductive component 300. The power failure protection device 100 and the conductive component 300 are both mounted on the mounting base 200. The power failure protection device 100 is used to disconnect the electrical connection between the input terminal and the output terminal of the conductive component 300.

[0046] The power failure protection device 100 includes a first state and a second state. The input terminal of the conductive component 300 is electrically connected to the power supply terminal, and the output terminal of the conductive component 300 is electrically connected to the load. In the first state, the power failure protection device 100 and the conductive component 300 are spaced apart. At this time, the control circuit 1000 is in the connected state as shown in Figure 1, and the control circuit 1000 can electrically connect the power supply and the load. In the second state, the power failure protection device 100 is in contact with the conductive component 300, and the power failure protection device 100 disconnects the conductive component 300, so that the input and output terminals of the conductive component 300 are disconnected. At this time, the control circuit 1000 is in the disconnected state as shown in Figure 2, and the power supply connected to the control circuit 1000 is disconnected from the load. Taking the control circuit 1000 applied to a motor as an example, the input terminal of the conductive component 300 is used to carry alternating current, and the other end of the conductive component 300 is connected to the motor so that the motor operates under the action of alternating current.

[0047] Referring to Figures 1 and 2, in some embodiments, a sensor is provided on the control circuit 1000. The sensor is used to sense the real-time changes in the current on the conductive component 300, thereby causing the controller to send a signal to the power-off protection device 100. When the sensor senses an abnormal current on the conductive component 300, the controller sends a signal to the power-off protection device 100, causing the power-off protection device 100 to switch from a first state to a second state, thereby causing the power-off protection device 100 to disconnect the electrical connection between the input and output terminals of the conductive component 300. Exemplarily, the abnormal current signal includes, but is not limited to, a current signal on the conductive component 300 greater than 1.75 A / ms or a current signal on the conductive component 300 greater than 1.5 A / 2ms, etc. The specific value of the abnormal current signal can be set according to the specific application circuit, and this application does not limit it.

[0048] Referring to Figures 1 and 2, in some embodiments, when the control circuit 1000 is applied in a high-voltage environment, the control circuit 1000 further includes an arc-extinguishing fuse. The arc-extinguishing fuse is connected in parallel with the conductive component 300, that is, one end of the arc-extinguishing fuse is connected to the input terminal of the conductive component 300, and the other end of the arc-extinguishing fuse is connected to the output terminal of the conductive component 300. The arc-extinguishing fuse is used to extinguish the arc in the disconnected conductive component 300, which can reduce the arc interference between the input and output terminals of the disconnected conductive component 300. The capacity and rated voltage of the arc-extinguishing fuse can be set according to the arc-extinguishing environment, and this application does not impose any limitations on this.

[0049] Please refer to Figures 1 and 2. In some embodiments, taking the control circuit 1000 applied to a motor as an example, the input terminal of the conductive component 300 is used to carry alternating current, and the other end of the conductive component 300 is connected to the motor so that the motor operates under the action of alternating current. The conductive component 300 includes a first conductive element 301, a second conductive element 302, and a third conductive element 303. The first conductive element 301, the second conductive element 302, and the third conductive element 303 are all mounted on the mounting base 200. The power failure protection device 100 is used to disconnect at least two of the first conductive element 301, the second conductive element 302, and the third conductive element 303.

[0050] The input terminals of the first conductive element 301, the second conductive element 302, and the third conductive element 303 are respectively connected to the A, B, and C phases of the power supply. The output terminals of the first conductive element 301, the second conductive element 302, and the third conductive element 303 are respectively connected to the U, V, and W power terminals of the motor, so that the current output by the power supply flows to the motor through the first conductive element 301, the second conductive element 302, and the third conductive element 303.

[0051] Referring to Figures 1 and 2, in one specific embodiment, the first conductive element 301 and the third conductive element 303 are arranged side by side, and the extension directions of the first conductive element 301 and the third conductive element 303 are the same. The second conductive element 302 is disposed on the same side of the first conductive element 301 and the third conductive element 303, and the extension direction of the second conductive element 302 is the same as the extension direction of the first conductive element 301 and the extension direction of the third conductive element. The power failure protection device 100 is installed on the mounting base 200 and located between the first conductive element 301 and the third conductive element 303. When the power failure protection device 100 switches from the first state to the second state, the power failure protection device 100 simultaneously disconnects the first conductive element 301 and the third conductive element 303, and the electrical connection between the input and output terminals of the conductive element 300 is broken, thereby providing power failure protection for the power supply and the load.

[0052] Understandably, in some other embodiments, the power failure protection device 100 is mounted on the mounting base 200 and located on the side of the first conductive member 301 away from the third conductive member 303. When the power failure protection device 100 switches from the first state to the second state, the power failure protection device 100 sequentially disconnects the first conductive member 301 and the third conductive member 303, and the electrical connection between the input and output terminals of the conductive member 300 is broken, thereby achieving power failure protection for the power supply and the load. This application does not limit this.

[0053] Referring to Figures 1 and 2, the first conductive element 301 has a first notch 304, which is positioned opposite to the power-off protection device 100. That is, the cutting position of the power-off protection device 100 on the first conductive element 301 corresponds to the first notch 304. The third conductive element 303 has a second notch 305, which is positioned opposite to the power-off protection device 100. That is, the cutting position of the power-off protection device 100 on the third conductive element 303 corresponds to the second notch 305. The presence of the first notch 304 and the second notch 305 reduces the difficulty for the power-off protection device 100 to cut off the first conductive element 301 and the third conductive element 303, thereby improving the power-off protection effect of the power-off protection device 100 on the control circuit 1000.

[0054] Please refer to Figures 1, 2, 3 and 4. Figure 3 is a structural diagram of a power failure protection device provided in the first embodiment of this application, and Figure 4 is a cross-sectional view of the power failure protection device shown in Figure 3.

[0055] The first embodiment of this application provides a power failure protection device 100, which is used to disconnect the electrical connection between the input and output terminals of a conductive component 300. The power failure protection device 100 includes a housing component 10, an actuating component 20, and an activating component 30. The housing component 10 has a hollow cavity 11. The actuating component 20 is movably housed within the hollow cavity 11 and is capable of extending from within the hollow cavity 11 to the outside of the hollow cavity 11. At least a portion of the activating component 30 is housed within the hollow cavity 11, and the activating component 30 drives the actuating component 20 to actuate, causing the actuating component 20 to extend out of the hollow cavity 11, thereby disconnecting the electrical connection between the input and output terminals of the conductive component 300.

[0056] The power failure protection device 100 provided in the first embodiment of this application drives the actuating component 20 to operate through the excitation component 30 in the housing component 10, so that the actuating component 20 cuts off the electrical connection between the input terminal and the output terminal of the conductive component 300, thereby de-energizing the circuit formed by the conductive component 300. This can reduce the occurrence of circuit runaway and electrical fire, and thus help improve circuit safety performance.

[0057] Please refer to Figures 1, 2, 3 and 4. In one embodiment, the actuating component 20 includes a first actuating element 21 and a second actuating element 22. The excitation component 30 is disposed between the first actuating element 21 and the second actuating element 22. The first actuating element 21 and the second actuating element 22 are used to cut off the input and output terminals of at least two conductive components 300 under the action of the excitation component 30. That is, the first actuating element 21 cuts off the first conductive component 301, and the second actuating element 22 cuts off the third conductive component 303.

[0058] The power failure protection device 100 provided in the first embodiment of this application, through the first actuating member 21 and the second actuating member 22 driven by the excitation member 30, respectively cuts off the electrical connection between the input and output terminals of the first conductive member 301 and the electrical connection between the input and output terminals of the third conductive member 303, so that two phases of the three-phase power of the conductive member 300 are cut off, thereby causing the three-phase circuit formed by the conductive member 300 to be de-energized. This can reduce the occurrence of circuit runaway and electrical fire, and thus help improve the circuit safety performance.

[0059] It is understood that in some other embodiments, the number of actuating components 20 is only one. By driving actuating component 20 through excitation component 30, two conductive components 300 can be cut off in sequence, or the three-phase circuit formed by conductive components 300 can be de-energized. This application does not limit this.

[0060] Referring to Figures 1, 2, 3, and 4, in one embodiment, the hollow cavity 11 has a first opening 111 and a second opening 112 disposed opposite to each other along a first direction of the housing component 10. A first actuating member 21 and a second actuating member 22 are housed within the hollow cavity 11, and the first actuating member 21 and the second actuating member 22 are spaced apart. An excitation member 30 is disposed between the first actuating member 21 and the second actuating member 22. The excitation member 30 is used to drive at least a portion of the first actuating member 21 to extend out of the first opening 111, and the excitation member 30 is also used to drive at least a portion of the second actuating member 22 to extend out of the second opening 112. The first direction is the X-axis direction as shown in Figure 4. Taking a tubular hollow cavity 11 as an example, the first direction is the axial direction of the tubular hollow cavity 11.

[0061] The power failure protection device 100 provided in the first embodiment of this application drives the first actuator 21 and the second actuator 22 to extend out of the first opening 111 and the second opening 112 respectively through the excitation component 30, so that the first actuator 21 and the second actuator 22 respectively cut off the first conductive component 301 and the third conductive component 303 of the conductive component 300, thereby causing the power failure protection device 100 to cut off the input and output terminals of the three-phase circuit formed by the conductive component 300.

[0062] Please refer to Figures 1, 2, 3 and 4. In one embodiment, the triggering component 30 includes an explosive element 31 and a detonator 32. The detonator 32 is used to detonate the explosive element 31. The explosive element 31 is located between the first actuating element 21 and the second actuating element 22. The explosive element 31 is used to generate an airflow that drives the first actuating element 21 and the second actuating element 22.

[0063] The power failure protection device 100 provided in the first embodiment of this application detonates the explosive component 31 by detonating the detonator 32, so that the airflow generated by the explosive component 31 pushes the first actuating component 21 and the second actuating component 22 to move in opposite directions. The first actuating component 21 extends out of the first opening 111 to cut off the first conductive component 301, and the second actuating component 22 extends out of the second opening 112 to cut off the third conductive component 303, so that the power failure protection device 100 can cut off the three-phase input terminal and output terminal formed by the conductive components 300.

[0064] For example, the air pressure of the gas flow generated by the instantaneous explosion of the explosive 31 is 2 to 8 MPa, so that the first actuating member 21 extends out of the first opening 111 to cut off the first conductive member 301, and the second actuating member 22 extends out of the second opening 112 to cut off the third conductive member 303.

[0065] It is understood that in some other embodiments, the excitation component 30 can be a mechanical drive component, which drives the first actuator 21 and the second actuator 22 to move in opposite directions so that the power failure protection device 100 can cut off the three-phase input and output terminals formed by the conductive component 300. This application does not limit this.

[0066] Please refer to Figures 3 and 4. In one embodiment, the activating component 30 further includes a fixing seat 33, which is disposed in the hollow cavity 11. The fixing seat 33 is used to fix the explosive component 31 to prevent the explosive component 31 from moving in the hollow cavity 11.

[0067] The power failure protection device 100 provided in the first embodiment of this application, through the setting of the fixing base 33, fixes the explosive 31 in the hollow cavity 11. On the one hand, it can improve the stability between the explosive 31 and the detonator 32, thereby improving the explosion reliability of the explosive 31. On the other hand, it can prevent the explosive 31 from moving in the hollow cavity 11 to be close to the first actuating member 21 or close to the second actuating member 22, so that the airflow generated by the explosion of the explosive 31 can act evenly on the first actuating member 21 and the second actuating member 22, which is beneficial to improve the consistency of the action of the first actuating member 21 and the second actuating member 22, thereby improving the timeliness of the first conductive member 301 and the third conductive member 303 being cut off.

[0068] Referring to Figures 3 and 4, in one embodiment, the power failure protection device 100 further includes a diversion component 40. The diversion component 40 is housed in the hollow cavity 11 and located between the first actuating member 21 and the second actuating member 22. The diversion component 40 and the fixing seat 33 are arranged opposite to and spaced apart along the second direction of the housing component 10. The diversion component 40 is used to divert the airflow generated after the explosive 31 is detonated, so that the airflow generated by the explosion of the explosive 31 acts evenly on the first actuating member 21 and the second actuating member 22. The second direction is perpendicular to the first actuating member 21, and is the Z-axis direction as shown in Figure 4. Taking the hollow cavity 11 as a tubular cavity as an example, the second direction is the radial direction of the tubular hollow cavity 11.

[0069] The power failure protection device 100 provided in the first embodiment of this application, through the setting of the diversion component 40, makes the airflow generated by the explosion of the explosive component 31 act evenly on the first actuating component 21 and the second actuating component 22, so that the movement speed and stroke of the first actuating component 21 and the second actuating component 22 are consistent, which is beneficial to improve the consistency of the action of the first actuating component 21 and the second actuating component 22, thereby improving the timeliness of the first conductive component 301 and the third conductive component 303 being cut off.

[0070] Please refer to Figures 3 and 4. In one specific embodiment, the diversion component 40 includes a first diversion surface 41 and a second diversion surface 42, which are symmetrically arranged along the second direction of the housing component 10.

[0071] The power failure protection device 100 provided in the first embodiment of this application is symmetrically arranged along the second direction of the housing component 10 by the first diversion surface 41 and the second diversion surface 42, so that the airflow generated by the explosion of the explosive component 31 acts evenly on the first actuating component 21 and the second actuating component 22, so that the movement speed and stroke of the first actuating component 21 and the second actuating component 22 are consistent, which is beneficial to improve the consistency of the action of the first actuating component 21 and the second actuating component 22, thereby improving the timeliness of the first conductive component 301 and the third conductive component 303 being cut off.

[0072] In this embodiment, the first diversion surface 41 and the second diversion surface 42 are planar. It is understood that in some other embodiments, the first diversion surface 41 and the second airflow surface are both curved surfaces, and this application does not limit this.

[0073] Referring to Figures 3 and 4, in one embodiment, the actuating component 20 further includes a first sealing portion 23, which is disposed between the first actuating component 21 and the inner wall of the hollow cavity 11. The first sealing portion 23 is used to seal the first actuating component 21 and the inner wall of the hollow cavity 11 when the first actuating component 21 moves within the hollow cavity 11. The power failure protection device 100 further includes a second sealing portion 24, which is disposed between the second actuating component 22 and the inner wall of the hollow cavity 11. The second sealing portion 24 is used to seal the second actuating component 22 and the inner wall of the hollow cavity 11 when the second actuating component 22 moves within the hollow cavity 11.

[0074] The power failure protection device 100 provided in the first embodiment of this application, through the provision of the first sealing part 23 and the second sealing part 24, prevents the gas flow generated by the explosion of the explosive 31 from overflowing between the first actuating member 21 and the inner wall of the hollow cavity 11, and also prevents it from overflowing between the second actuating member 22 and the inner wall of the hollow cavity 11. This ensures that the gas flow generated by the explosion of the explosive 31 fully acts on the first actuating member 21 and the second actuating member 22, thereby guaranteeing the driving effect of the gas flow generated by the explosion of the explosive 31 on the first actuating member 21 and the second actuating member 22, which is beneficial to improving the driving effect and driving stability of the gas flow generated by the explosion of the explosive 31 on the first actuating member 21 and the second actuating member 22.

[0075] It is understood that in some other embodiments, the power failure protection device 100 may include only the first sealing part 23, or only the second sealing part 24, and this application does not limit this.

[0076] Referring to Figures 3 and 4, in one embodiment, the first actuating member 21 has a first groove 211 and a first recess 212. The opening of the first groove 211 faces the second actuating member 22, and the first recess 212 is disposed around the opening of the first groove 211. The second actuating member 22 has a second groove 221 and a second recess 222. The opening of the second groove 221 faces the first actuating member 21, and the second recess 222 is disposed around the opening of the second groove 221.

[0077] The power failure protection device 100 provided in the first embodiment of this application, through the provision of a first groove 211 and a second groove 221, allows both the first groove 211 and the second groove 221 to accommodate a portion of air. This increases the interference fit of the first sealing portion 23 and the second sealing portion 24 during the assembly of the power failure protection device 100, thereby improving the airtightness between the first actuating member 21 and the housing component 10, as well as the airtightness between the second actuating member 22 and the housing component 10. The first recess 212 allows for a larger surface area of ​​the gas flow generated by the explosion of the explosive component 31 acting on the first actuating member 21, reducing the likelihood of damage or failure of the first actuating member 21 due to instantaneous impact, thus ensuring the reliability of the power failure protection device 100. Similarly, the second recess 222 allows for a larger surface area of ​​the gas flow generated by the explosion of the explosive component 31 acting on the second actuating member 22, further reducing the likelihood of damage or failure of the first actuating member 21 due to instantaneous impact, thus ensuring the reliability of the power failure protection device 100.

[0078] It is understood that in some other embodiments, the power failure protection device 100 may only provide the first groove 211 on the first actuating member 21, or only provide the second groove 221 on the second actuating member 22, and this application does not limit this.

[0079] It is understood that in some other embodiments, the power failure protection device 100 may omit the provision of the first recess 212 on the first actuating member 21, or may omit the provision of the second recess 222 on the second actuating member 22. This application does not limit this.

[0080] It is understood that in some other embodiments, the power failure protection device 100 may omit the provision of the first groove 211 in the first actuating member 21 and the provision of the second groove 221 in the second actuating member 22. This application does not limit this.

[0081] It is understood that in some other embodiments, the power failure protection device 100 may omit the provision of the first recess 212 in the first actuating member 21 and the provision of the second recess 222 in the second actuating member 22. This application does not limit this.

[0082] Please refer to Figures 3 and 4. In one embodiment, the housing component 10 includes a sleeve 12 and an outer shell 13. A hollow cavity 11 is disposed inside the sleeve 12, and the outer shell 13 is sleeved outside the sleeve 12.

[0083] The power failure protection device 100 provided in the first embodiment of this application forms a hollow cavity 11 through a sleeve, so that the gas flow generated by the explosion of the explosive component 31 can act on the first actuating component 21 and the second actuating component 22 in the sealed space, thereby pushing the first actuating component 21 and the second actuating component 22 to extend out of the first opening 111 and the second opening 112 respectively, so as to cut off the input and output terminals of the conductive component 300. A housing 13 is sleeved on the outside of the sleeve 12, and the housing 13 can be fixedly connected to the connecting seat, so that the power failure protection device 100 is fixed on the connecting seat as a whole.

[0084] In one specific embodiment, the sleeve 12 is provided with a mounting hole 121, which communicates with the hollow cavity 11. The mounting hole 121 facilitates the mounting of the explosive component 31 onto the fixing seat 33 of the hollow cavity 11. At the same time, the outer shell 13 is fitted with the mounting hole 121 to seal the mounting hole 121, thereby allowing the gas flow generated by the explosion of the explosive component 31 to act on the first actuating component 21 and the second actuating component 22 within the confined space.

[0085] In one specific embodiment, the housing 13 has a threaded hole, and the housing 13 is fixed to the connector by screws.

[0086] Referring to Figures 3 and 4, in one embodiment, the housing component 10 further includes a first limiting member 14, which is installed on the sleeve and located at the first opening 111 of the hollow cavity 11. The inner diameter of the first limiting member 14 at the first opening 111 is smaller than the maximum outer diameter of the first actuating member 21, and the first limiting member 14 is used to prevent the first actuating member 21 from falling out of the first opening 111 of the hollow cavity 11. The housing component 10 also includes a second limiting member 15, which is installed on the sleeve and located at the second opening 112 of the hollow cavity 11. The inner diameter of the second limiting member 15 at the second opening is smaller than the maximum outer diameter of the second actuating member 22, and the second limiting member 15 is used to prevent the second actuating member 22 from falling out of the second opening 112 of the hollow cavity 11.

[0087] The power failure protection device 100 provided in the first embodiment of this application, through the provision of the first limiting member 14, can prevent the first actuating member 21 from detaching from the hollow cavity 11 at the first opening 111. Through the provision of the second limiting member 15, it can prevent the second actuating member 22 from detaching from the hollow cavity 11 at the second opening 112. Therefore, by providing the first limiting member 14 and the second limiting member 15, the power failure protection device 100 will not be driven to detach from the first actuating member 21 and the second actuating member 22 after the explosive component 31 detonates, which is beneficial to improving the operational stability of the power failure protection device 100.

[0088] It is understood that in some other embodiments, the housing component 10 may include only the first limiting member 14, or the housing component 10 may include only the second limiting member 15, and this application does not limit this.

[0089] Furthermore, the first limiting member 14 is threadedly connected to the sleeve, and the second limiting member 15 is threadedly connected to the sleeve.

[0090] Please refer to Figures 5 and 6. Figure 5 is a structural diagram of a power failure protection device provided in the second embodiment of this application, and Figure 6 is a cross-sectional view of the power failure protection device shown in Figure 5.

[0091] The power failure protection device 100 provided in the second embodiment of this application has a structure that is generally the same as that provided in the first embodiment of this application. The difference is that the power failure protection device 100 provided in the second embodiment of this application also includes an explosion-proof pipe 16.

[0092] Specifically, in the power failure protection device 100 provided in the second embodiment of this application, the housing component 10 further includes an explosion-proof tube 16, which is sleeved outside the sleeve 12, and the outer shell 13 is sleeved outside the explosion-proof tube 16. By setting the explosion-proof tube 16 between the outer wall of the sleeve 12 and the inner wall of the outer shell 13, the impact force of the gas flow generated by the explosion of the explosive component 31 on the outer shell 13 can be reduced, thereby reducing the damage to the outer shell 13 caused by the gas flow generated by the explosion of the explosive component 31. Therefore, by setting the explosion-proof tube 16, the specifications of the explosive component 31 within the same sealed volume can be improved, that is, the gas flow pressure generated by the explosion of the explosive component 31 can be greater, enabling the power failure protection device 100 to have a good cutting effect on conductive components of different specifications, and ensuring the impact resistance performance of the power failure protection device 100, which is beneficial to improving the applicability of the power failure protection device 100. One end of the detonator 32 is connected to the explosive 31, and the other end of the detonator 32 is sequentially fitted with a sleeve 12, an explosion-proof tube 16, and an outer shell 13.

[0093] Please refer to Figures 5 and 6. Specifically, in the power failure protection device 100 provided in the second embodiment of this application, the housing component 10 further includes a pin 17. The housing component 10 also has a pressure relief hole 18, which penetrates the explosion-proof pipe 16 and the sleeve 12 and communicates with the hollow cavity 11. The pin 17 is movably disposed in the pressure relief hole 18. With the arrangement of the pressure relief hole 18 and the pin 17, the pin 17 is movably disposed within the pressure relief hole 18. When the explosive component 31 explodes and generates a large gas flow pressure, the pin 17 moves, causing the pressure relief hole 18 to communicate with the outside, so that the power failure protection device 100 has the functions of emergency pressure relief and explosion prevention. At the same time, with the arrangement of the pressure relief hole 18 and the pin 17, the first actuating component 21 and the second actuating component 22 can be prevented from shifting due to excessive gas pressure during the assembly process of the power failure protection device 100.

[0094] Please refer to Figures 5 and 6. Specifically, in the power failure protection device 100 provided in the second embodiment of this application, a plug-in portion 131 protrudes from the outer casing 13. The end of the detonator 32 facing away from the explosive 31 passes through the plug-in portion 131. The plug-in portion 131 is used to connect the detonator 32 with an external detonation signal. The plug-in portion 131 facilitates the connection of the detonator 32 with an external signal generating device, and the detonator 32 transmits the signal emitted by the external signal generating device to cause the plug-in portion 131 to detonate.

[0095] Please refer to Figures 1, 2, 5, and 6. Specifically, in the power failure protection device 100 provided in the second embodiment of this application, the outer shell 13 includes a first shell 132 and a second shell 133. The first shell 132 and the second shell 133 are fastened together so that the outer shell 13 is entirely fitted over the sleeve and the explosion-proof pipe 16. The plug-in part 131 is provided on the first shell 132, and the second shell 133 is used to connect with the mounting base 200.

[0096] Please refer to Figures 5 and 6. Specifically, in the power failure protection device 100 provided in the second embodiment of this application, the first limiting member 14 is welded to the end of the hollow cavity 11 of the sleeve 12 near the first opening 111, and the second limiting member 15 is welded to the end of the hollow cavity 11 of the sleeve 12 near the second opening 112.

[0097] Please refer to Figures 7 and 8. Figure 7 is a structural diagram of a power failure protection device provided in the third embodiment of this application from a first perspective, and Figure 8 is a structural diagram of a power failure protection device provided in the third embodiment of this application from a second perspective.

[0098] The power failure protection device 100 provided in the third embodiment of this application has a structure that is generally the same as that provided in the second embodiment of this application. The difference is that the power failure protection device 100 provided in the third embodiment of this application omits the plug-in portion 131 provided on the outer casing 13.

[0099] Please refer to Figures 9 and 10. Figure 9 is a structural diagram of a power failure protection device provided in the fourth embodiment of this application from a first perspective, and Figure 10 is a structural diagram of a power failure protection device provided in the fourth embodiment of this application from a second perspective.

[0100] The power failure protection device 100 provided in the fourth embodiment of this application has a structure that is generally the same as that provided in the second embodiment of this application. The difference is that the outer shell 13 of the power failure protection device 100 provided in the fourth embodiment of this application is formed by injection molding.

[0101] The above are some embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A power-off protection device for cutting off the electrical connection between the input end and the output end of a conductive component (300), the power-off protection device comprising: a housing component (10) having a hollow cavity (11); a moving component (20) movably accommodated in the hollow cavity (11), the moving component (20) being capable of extending out of the hollow cavity (11); and an excitation component (30) at least partially accommodated in the hollow cavity (11), the excitation component (30) being configured to drive the moving component (20) to cut off the electrical connection between the input end and the output end of the conductive component (300).

2. The power-off protection device according to claim 1, the moving component (20) comprises a first moving part (21) and a second moving part (22); the excitation component (30) is disposed between the first moving part (21) and the second moving part (22); the first moving part (21) and the second moving part (22) are configured to cut off the electrical connection between the input end and the output end of at least two conductive components (300) under the action of the excitation component (30).

3. The power-off protection device according to claim 2, the hollow cavity (11) has a first opening (111) and a second opening (112) oppositely disposed along a first direction of the housing component (10); the first moving part (21) is accommodated in the hollow cavity (11), the second moving part (22) is accommodated in the hollow cavity (11), the first moving part (21) and the second moving part (22) are disposed in a spaced-apart manner; the excitation component (30) is configured to drive at least a portion of the first moving part (21) to extend out of the first opening (111), the excitation component (30) is further configured to drive at least a portion of the second moving part (22) to extend out of the second opening (112).

4. The power-off protection device according to claim 3, the excitation component (30) comprises an explosion part (31) and an igniter (32), the igniter (32) is configured to ignite the explosion part (31), the explosion part (31) is located between the first moving part (21) and the second moving part (22), the explosion part (31) is configured to generate a gas flow for driving the first moving part (21) and the second moving part (22).

5. The power-off protection device according to claim 4, the excitation component (30) further comprises a fixing seat (33), the fixing seat (33) is disposed in the hollow cavity (11), the fixing seat (33) is configured to fix the explosion part (31).

6. The power-off protection device according to any one of claims 4-5, the power-off protection device further comprises a shunt component (40), the shunt component (40) is accommodated in the hollow cavity (11) and located between the first moving part (21) and the second moving part (22), the shunt component (40) is configured to shunt the gas flow generated after the explosion part (31) is ignited.

7. The power-off protection device according to claim 6, ​ The shunt component (40) comprises a first shunt surface (41) and a second shunt surface (42), the first shunt surface (41) and the second shunt surface (42) are symmetrically arranged along a second direction of the housing component (10), the second direction is perpendicular to the first direction.

8. The power-off protection device according to any one of claims 4-7, The power-off protection device further comprises a first sealing part (23) arranged between the first moving part (21) and the inner wall of the hollow cavity (11); and / or, the power-off protection device further comprises a second sealing part (24) arranged between the second moving part (22) and the inner wall of the hollow cavity (11).

9. The power-off protection device according to any one of claims 4-8, The first moving part (21) has a first groove (211) and a first recess (212), the opening of the first groove (211) faces the second moving part (22), and the first recess (212) is arranged around the opening of the first groove (211); and / or, the second moving part (22) has a second groove (221) and a second recess (222), the opening of the second groove (221) faces the first moving part (21), and the second recess (222) is arranged around the opening of the second groove (221).

10. The power-off protection device according to any one of claims 4-9, The housing component (10) comprises a sleeve (12) and a shell (13), the hollow cavity (11) is arranged in the sleeve (12), and the shell (13) is sleeved outside the sleeve (12).

11. The power-off protection device according to claim 10, The housing component (10) further comprises an explosion-proof pipe (16), the explosion-proof pipe (16) is sleeved outside the sleeve (12), and the shell (13) is sleeved outside the explosion-proof pipe (16).

12. The power-off protection device according to claim 11, The housing component (10) further comprises a pin (17), and the housing component (10) further has a pressure relief hole (18) penetrating through the explosion-proof pipe (16) and the sleeve (12) and communicating with the hollow cavity (11), and the pin (17) is movably arranged in the pressure relief hole (18).

13. The power-off protection device according to claim 10, The shell component (10) further comprises a first limiting member (14) mounted on the sleeve and located at the first opening (111) of the hollow cavity (11), the first limiting member (14) being used to limit the first action member (21) from falling off from the first opening (111) of the hollow cavity (11); and / or, the shell component (10) further comprises a second limiting member (15) mounted on the sleeve and located at the second opening (112) of the hollow cavity (11), the second limiting member (15) being used to limit the second action member (22) from falling off from the second opening (112) of the hollow cavity (11).

14. The power-off protection device of claim 10, The shell (13) is provided with a plug-in part (131), the detonating member (32) passes through the plug-in part (131), and the plug-in part (131) is used to make the detonating member (32) communicate with an external detonation signal.

15. A control circuit, comprising: The power-off protection device according to any one of claims 1 to 14; A mounting seat (200), the power-off protection device being mounted on the mounting seat (200); And A conductive component (300), the conductive component (300) being mounted on the mounting seat (200), and the power-off protection device being used to cut off the electrical connection between the input end and the output end of the conductive component (300).

16. The control circuit of claim 15, The conductive component (300) comprises a first conductive member (301), a second conductive member (302) and a third conductive member (303), the first conductive member (301), the second conductive member (302) and the third conductive member (303) are all mounted on the mounting seat (200), and the power-off protection device is used to cut off at least two of the first conductive member (301), the second conductive member (302) and the third conductive member (303).

17. The control circuit of claim 16, The power-off protection device is used to cut off the first conductive member (301) and the third conductive member (303); the first conductive member (301) is provided with a first notch (304), the third conductive member (303) is provided with a second notch (305), and the power-off protection device is used to cut off at the position of the first notch (304) of the first conductive member (301) and cut off at the position of the second notch (305) of the third conductive member (303).

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