Integrated shunt excitation device

Abstract

The utility model relates to an integrated shunt excitation device. The integrated shunt excitation device specifically comprises an excitation fuse, a trigger module and a shunt module, the excitation fuse comprises an electronic ignition assembly, a piston and a conductive piece. The diverter module is connected in series in the conductive part to replace the part, needing to be disconnected, of the conductive part, the trigger module is connected with the diverter module and the electronic ignition assembly, and the trigger module starts the electronic ignition assembly according to a received current signal monitored by the diverter module when the current signal exceeds a set threshold value. The trigger module sends a trigger signal to the electronic ignition assembly to enable the electronic ignition assembly to act to release high-pressure gas to drive the piston to disconnect the diverter module and disconnect the main loop. According to the invention, the diverter replaces the to-be-disconnected part of the conductive member, so that the conductive member is relatively simple in structure, and the excitation device is smaller in size.

Description

Technical Field

[0001] The present invention relates to the fields of circuit detection protection and excitation fuses, and particularly to an integrated shunt excitation device with a shunt integrated on an excitation fuse. Background Art

[0002] Currently, in high-voltage protection systems in new energy fields such as electric vehicles, wind-solar energy storage, etc., excitation fuses are used for breaking in short circuits and special situations, and current sensors (such as magnetic induction current sensors, shunts, etc.) are used for current detection and feedback, which can meet the full-range current measurement and protection of the system. However, the sensors and excitation fuses respectively perform the functions of current detection and system protection. To further improve the safety of the system, a passive protection method that can respond to overload current or short-circuit current in a timely manner is required, that is, using the overload current or short-circuit current detected by the current sensor as the input of the trigger signal, so that the excitation fuse can receive an internal instruction to be triggered passively. For example, a variable threshold integrated protection device disclosed in Chinese Patent CN116978735A monitors the current by connecting a shunt in series on a conductive part as the input of the trigger signal. Integrating the shunt on the conductive part of the excitation fuse can achieve real-time monitoring of the current signal of the conductive part and timely response. However, it still has certain defects: the easily broken groove of the conductive part where the piston disconnects is spaced apart from the shunt, making the structure of the conductive part of the excitation fuse complex to process, and since the easily broken groove of the conductive part and the shunt need to be placed inside the housing respectively, the volume of the excitation fuse increases. Summary of the Invention

[0003] The purpose of the present invention is to provide an integrated shunt excitation device. By directly connecting the shunt in series in the conductive part and making the shunt replace the part of the conductive part that needs to be disconnected, the structure of the conductive part of the excitation fuse is relatively simple and the volume is relatively small.

[0004] To achieve the above purpose, the technical solution provided by the present invention is an integrated shunt excitation device, including an excitation fuse, a trigger module, and a shunt module; the excitation fuse includes an electronic ignition component, a piston, and a conductive part;

[0005] The shunt module includes a shunt element and a shunt connector. The shunt element is connected in series in the conductive part to form the part of the conductive part that needs to be disconnected. The shunt connector is arranged on one side of the conductive part and outside the displacement path of the piston, and is electrically connected to the shunt element;

[0006] The piston is arranged corresponding to the shunt element, and the chamber where the high-pressure gas release end of the electronic ignition component is located communicates with the chamber where the end of the piston away from the shunt element is located;

[0007] The trigger module is electrically connected to the shunt connector, enabling the shunt element to send the monitored current signal to the trigger module;

[0008] The trigger module is electrically connected to the electronic ignition assembly;

[0009] When the trigger module determines that the monitored current signal exceeds the set threshold, the trigger module sends a passive trigger signal to the electronic ignition assembly, and the electronic ignition assembly releases high-pressure gas to drive the piston to cut off the shunt element, thereby cutting off the conductive part.

[0010] Preferably, the shunt connector is of a U-shaped structure. The two side walls of the U-shaped structure are respectively located on the conductive parts at both ends of the shunt element. The bottom of the U-shaped structure is located outside the conductive part, and the plug-in connection part of the shunt connector is arranged on one side of the bottom of the U-shaped structure located outside the conductive part.

[0011] Preferably, the trigger module can feedback the monitored current signal to the control system of the user terminal. The control system can send an active trigger instruction to the trigger module. The trigger module sends an active trigger signal to the electronic ignition assembly according to the received active trigger instruction, and the electronic ignition assembly releases high-pressure gas to drive the piston to cut off the conductive part.

[0012] Preferably, the power supply of the trigger module includes an active trigger power supply and a backup power supply. The active trigger power supply and the backup power supply are electrically connected to the trigger module in parallel. The active trigger power supply is located outside the integrated shunt excitation device, and the backup power supply is located inside the integrated shunt excitation device.

[0013] Preferably, the backup power supply is a capacitor or a battery.

[0014] Preferably, an arc extinguishing fuse is connected in parallel on the conductive part. The two ends of the arc extinguishing fuse are conductively connected to the two ends of the part of the conductive part to be disconnected; the arc extinguishing fuse is arranged in an arc extinguishing medium.

[0015] Preferably, the trigger module is electrically connected to the shunt connector through a connector, enabling the shunt element to send the monitored current signal to the trigger module.

[0016] Preferably, the triggering module includes a control chip and an electronic switch; the electronic switch, the active trigger power supply, and the electronic ignition component are connected in series to form a trigger circuit. The control chip is electrically connected to the electronic switch to control the opening and closing of the electronic switch. In the initial and normal working states, the electronic switch is open, and the trigger circuit is not conducting. The shunt element is electrically connected to the control chip to provide a monitored current signal to the control chip. The control chip determines whether the received current signal exceeds a set threshold. When the set threshold is exceeded, the control chip controls the electronic switch to close, the trigger circuit conducts, and a passive trigger signal is sent to the electronic ignition component. The shunt element can be connected to the control system of the user terminal through the triggering module to provide a real-time monitored current signal to the control system. The electronic switch can also be electrically connected to the control system of the user terminal, and the opening and closing of the electronic switch can be controlled through the control system of the user terminal. When the monitored current signal exceeds the set threshold or an abnormal situation occurs, the control system can control the electronic switch to close, making the trigger circuit conduct, and an active trigger signal is sent to the electronic ignition component. The electronic ignition component acts according to the first received trigger signal, releases high-pressure gas, and drives the piston to disconnect the conductive part from the shunt element.

[0017] In the present invention, a shunt connected in series in the conductive part replaces the part of the conductive part that needs to be disconnected. While monitoring the current signal, it acts as the part of the conductive part that needs to be disconnected, making the structure of the conductive part simpler, more convenient to process, shortening the length of the conductive part, and thus reducing the volume of the excitation fuse.

[0018] The active trigger power supply and the backup power supply are backup to each other. When the low-voltage circuit (active trigger power supply) loses power, the backup power supply is used to provide power to the triggering module and the energy required for the excitation trigger action, and a capacitor or a battery can be used.

[0019] Two triggering signal modes of active trigger signal and passive trigger signal are adopted to achieve primary and secondary protection, making the protection range and application range of the excitation device wider, and at the same time, improving the working reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the principle structure of the present invention.

[0021] Figure 2 is a schematic diagram of the specific structure in which the shunt module is integrated on the conductive part.

[0022] Reference Signs:

[0023] Conductive part 1, excitation fuse 2, shunt module 3, trigger module 4, active trigger power supply 6, backup power supply 7, arc extinguishing fuse element 8, shunt 10, shunt connector 11, piston 12, electronic ignition assembly 21. Detailed implementation mode

[0024] The integrated shunt excitation device of the present invention includes an excitation fuse, a trigger module, and a shunt module; the excitation fuse includes an electronic ignition assembly, a piston, and a conductive part;

[0025] The shunt module includes a shunt element and a shunt connector. The shunt element is connected in series in the conductive part to form a part of the conductive part that needs to be disconnected. The shunt connector is arranged on one side of the conductive part and outside the displacement path of the piston, and is electrically connected to the shunt element;

[0026] The piston is arranged corresponding to the shunt element. The chamber where the high-pressure gas release end of the electronic ignition assembly is located communicates with the chamber where the end of the piston away from the shunt element is located;

[0027] The trigger module is electrically connected to the shunt connector so that the shunt element sends a monitored current signal to the trigger module;

[0028] The trigger module is electrically connected to the electronic ignition assembly;

[0029] When the trigger module determines that the monitored current signal exceeds the set threshold, the trigger module sends a passive trigger signal to the electronic ignition assembly. The electronic ignition assembly releases high-pressure gas to drive the piston to cut off the shunt element, thereby cutting off the conductive part.

[0030] The following are preferred embodiments and specific descriptions are given in conjunction with the drawings. The orientation terms involved are only based on the orientation shown in the drawings and do not constitute a limitation on the technical solution of the present invention.

[0031] Refer to Figure 1 , based on the integrated shunt excitation device: including excitation fuse 2, shunt module 3, trigger module 4, backup power supply 7, and the trigger module 4 is electrically connected to the excitation fuse 2, shunt module 3, and backup power supply 7 respectively.

[0032] The shunt module 3 is connected in series to the conductive part 1 of the excitation fuse, forming the part of the conductive part 1 that needs to be disconnected, which is used to monitor the current of the conductive part 1 of the excitation fuse 2 in real time and send the monitored current signal to the trigger module 4. The trigger module 4 makes a judgment based on the current signal monitored by the shunt module 3 it receives, that is, determines whether the monitored current signal exceeds the set threshold. When the monitored current signal exceeds the set threshold, the trigger module 4 sends a passive trigger signal to the excitation fuse 2, and the excitation fuse 2 operates to cut off the main circuit. The trigger module 4 can be connected to an external active trigger power supply 6 to provide a working power supply for the trigger module 4. To improve the working reliability of the trigger module 4, when the active trigger power supply fails, the backup power supply 7 can provide a working power supply for the touch module. The working reliability of the trigger module 4 is improved through the backup of the active trigger power supply and the backup power supply.

[0033] The trigger module 4 can also feedback the received monitored current signal to the control system of the user terminal. At the same time, it can also receive an active trigger instruction from the control system of the user terminal, and send an active trigger signal to the excitation fuse 2 according to the received active trigger instruction, so that the excitation fuse 2 operates. By sending a passive trigger signal and an active trigger signal to the excitation fuse 2 through the trigger module 4, the working reliability of the excitation fuse 2 is improved, and the applicable scenarios of the excitation fuse 2 are broadened.

[0034] The trigger module 4 includes a control chip and an electronic switch (both not shown), and a trigger circuit. The trigger circuit includes an active trigger power supply 6, an electronic switch, and an electronic ignition component 21 connected in series. The control chip is electrically connected to the electronic switch to control the closing of the electronic switch. The shunt element 10 is electrically connected to the control chip to provide the monitored current signal for the control chip. The control chip compares the received monitored current signal with the set threshold. When the monitored current signal exceeds the set threshold, the control chip controls the electronic switch to close, conducting the trigger circuit, and the trigger circuit sends a passive trigger signal to the electronic ignition component, and the electronic ignition component operates according to the received trigger signal.

[0035] The trigger module 4 also feedbacks the monitored current signal sent by the shunt element 10 to the control system of the user terminal. The control system of the user terminal is electrically connected to the electronic switch and is used to control the closing of the electronic switch. When the monitored current signal exceeds the set threshold or an abnormal situation occurs (such as when used in a car, the collision, fire, etc. of the car), the control system controls the electronic switch to close, making the trigger circuit conduct, and sending an active trigger signal to the electronic ignition component, and the electronic ignition component operates according to the received trigger signal.

[0036] A standby power supply 7 is connected in parallel to the active trigger power supply 6. The active trigger power supply 6 is located outside the excitation device, that is, in the scenario when the excitation device is in use. The standby power supply 7 is located inside the excitation device and is connected in parallel with the active trigger power supply 6 in the trigger circuit. The standby power supply 7 is a capacitor or a battery. When the active trigger power supply 6 fails, the standby power supply 7 can be activated to provide electrical energy for the trigger module.

[0037] The excitation fuse 2 includes a housing (not shown), a conductive member 1, an electronic ignition assembly 21, a piston 12, and an arc extinguishing fuse element 8. A cavity is provided inside the housing. The conductive member 1 is inserted through the housing and also passes through the cavity inside the housing. Both ends of the conductive member 1 are located outside the housing of the excitation fuse 2 and can be connected in series with the main circuit.

[0038] The shunt module 3 includes a shunt element 10 and a shunt connector 11. Refer to Figure 2 , a shunt element 10 is connected in series in the conductive member 1, and the shunt element 10 replaces the part of the conductive member 1 that needs to be disconnected. The thickness of the shunt element 10 is less than the thickness of the conductive member 1, and a groove for reducing mechanical strength is formed at the position of the conductive member 1 where the shunt element 10 is located. Shunt contacts 5 are provided on the conductive member 1 at both ends of the shunt element 10 in the length direction of the conductive member 1. The overall structure of the shunt connector 11 is in a U-shaped structure. The insertion end of the shunt connector 11 is located on one side of the bottom of the U-shaped structure. When the shunt connector 11 is connected to the conductive member 1: both sides of the U-shaped groove of the shunt connector 11 are located on the conductive member 1 at both ends of the shunt element 10 and are electrically connected to the conductive member 1, and the bottom of the U-shaped structure is located outside one side of the shunt element 10 and the conductive member 1, so that the insertion end of the shunt connector 11 is located outside the conductive member 1 and does not affect the displacement of the piston 12.

[0039] For the convenience of installation and reduction of installation parts, the shunt element and the shunt connector are integrally provided on the conductive member.

[0040] In a cavity on one side of the conductive member 1 within the housing, an electronic ignition assembly 21 and a piston 12 are provided. The piston 12 is arranged corresponding to the shunt element 10 on the conductive member 1. The electronic ignition assembly 21 is a gas generating device that can release high-pressure gas as a driving force. The chamber where the high-pressure gas release end of the electronic ignition assembly 21 is located communicates with the chamber where the end of the piston 12 away from the shunt element 10 is located, enabling the high-pressure gas released by the electronic ignition assembly 21 to drive the piston 12 to displace towards the shunt element. A sealed space needs to be maintained between the electronic ignition assembly 21 and the piston 12 to prevent high-pressure gas leakage. A sealing groove is provided on the contact surface of the piston 12 in contact with the cavity within the housing, and an O-ring (not shown) is provided in the sealing groove to achieve the seal between the piston 12 and the cavity of the housing. On the relative two sides of the outer periphery of the end of the piston 12 close to the shunt element 10, limiting bumps are respectively arranged at intervals to define the initial position of the piston 12. During installation, the limiting bumps of the piston 12 are clamped at the grooves outside the cavity of the housing. When the piston 12 is driven by high-pressure gas, the piston 12 first disconnects from the limiting bumps, and then the piston 12 displaces along the inside of the cavity of the housing to cut off the shunt element 10.

[0041] The parallel melt 8 is connected in parallel at both ends of the part to be disconnected on the conductive member 1. The parallel dielectric 8 is penetrated in the arc extinguishing medium, and the arc extinguishing medium is filled in the arc extinguishing chamber. The resistance of the parallel melt 8 is much higher than that of the conductive member 1. After the conductive member 1 is disconnected, the current flows through the parallel melt 8 statically. The parallel melt 8 can be fused or disconnected mechanically. When disconnecting mechanically: A displacement channel is provided in the arc extinguishing chamber. The melt passes through the displacement channel, and a melt disconnecting assembly is provided in the displacement channel. The melt disconnecting assembly clamps the melt in the displacement channel. The melt disconnecting assembly is located on the piston displacement path. When the piston continues to displace after disconnecting the shunt element, it can drive the melt disconnecting assembly to displace, and disconnect the parallel melt 8 through the displacement of the melt disconnecting assembly. The fracture of the parallel melt 8 when fused or disconnected mechanically is located in the arc extinguishing medium.

[0042] Working principle:

[0043] The working states of the excitation device of the present invention include normal operation, passive protection, active protection, and passive protection after low-voltage power loss (active trigger power failure).

[0044] During normal operation, the main circuit is in a conducting state, the electronic switch of the trigger module 4 is in an off state, the trigger circuit is not conducting, and the electronic ignition assembly does not act; almost all the current flows through the conductive member, and the current on the parallel melt can be ignored.

[0045] In passive protection, when overload or short - circuit occurs in the main circuit, the shunt element sends the monitored current signal to the control chip of the trigger module 4. If the control chip determines that the monitored current exceeds the set threshold, the control chip of the trigger module 4 controls the electronic switch to close, making the trigger circuit conductive. A passive trigger signal is sent to the electronic ignition component of the excitation fuse. The electronic ignition component acts, releases high - pressure gas as the driving force, drives the piston to displace, the piston disconnects the shunt element, disconnects the conductive part, and then the arc - extinguishing fuse melts or is disconnected mechanically, achieving the cut - off protection of large current and zero current, disconnecting the main circuit, and completing passive protection.

[0046] In active protection, when overload, short - circuit or abnormal conditions occur in the main circuit, the control system of the external user terminal issues an active trigger command, controls the electronic switch of the trigger module to conduct, makes the trigger circuit conductive, and sends an active trigger signal to the electronic ignition component. The electronic ignition component acts to release high - pressure gas as the driving force, drives the piston to displace, the piston disconnects the shunt element, disconnects the conductive part, and then the arc - extinguishing fuse melts or is disconnected mechanically, achieving the cut - off protection of large current and zero current, disconnecting the main circuit, and completing active protection.

[0047] The active trigger signal and the passive trigger signal can be sent simultaneously or successively. When sent successively, the electronic ignition component responds to the trigger signal received first.

[0048] When there is a low - voltage power failure (the active trigger power supply fails), the active protection fails. At this time, when a short - circuit or abnormal condition occurs in the main circuit and the current value monitored by the shunt element reaches the threshold set for passive protection, the control chip controls the electronic switch to close, making the trigger circuit conductive. At this time, the trigger circuit is powered by the backup power supply, a trigger signal is sent, the electronic ignition component acts, and the interruption sequence is the same as that of active protection, completing the passive protection after low - voltage power failure.

[0049] In the present invention, the shunt element is connected in series in the conductive part, replacing the part of the conductive part that needs to be disconnected, making the structure of the conductive part simple, shortening the length of the conductive part inside the housing, and reducing the volume of the excitation device.

Claims

1. An integrated shunt excitation device, characterized in that: It includes an excitation fuse, a trigger module, and a shunt module; the excitation fuse includes an electronic ignition component, a piston, and a conductive part; The shunt module comprises a shunt element and a shunt connector, wherein the shunt element is connected in series in the conductive member to form a portion of the conductive member to be disconnected, and the shunt connector is arranged on one side of the conductive member and outside the piston displacement path, and is electrically connected to the shunt element; The piston is arranged corresponding to the diverter element, and the chamber where the high-pressure gas release end of the electronic ignition component is located is connected to the chamber where the end of the piston away from the diverter element is located; The trigger module is electrically connected to the shunt connector so that the shunt element sends a monitored current signal to the trigger module; The trigger module is electrically connected to the electronic ignition assembly; When the trigger module determines that the monitored current signal exceeds a set threshold, the trigger module sends a passive trigger signal to the electronic ignition component, and the electronic ignition component releases high-pressure gas to drive the piston to cut off the diverter element, thereby cutting off the conductive member.

2. The integrated diverter excitation device according to claim 1, characterized in that: The diverter connector is a U-shaped structure, and the two side walls of the U-shaped structure are respectively located on the conductive parts at both ends of the diverter element, the bottom of the U-shaped structure is located outside the conductive parts, and the plug-in connection part of the diverter connector is arranged on the bottom side of the U-shaped structure outside the conductive parts.

3. The integrated diverter excitation device according to claim 1, characterized in that: The trigger module can feed back the monitored current signal to the control system at the user end, and the control system can send an active trigger instruction to the trigger module. The trigger module sends an active trigger signal to the electronic ignition component according to the received active trigger instruction, and the electronic ignition component releases high-pressure gas to drive the piston to cut off the conductive part.

4. The integrated diverter excitation device according to claim 1, characterized in that: The power supply of the trigger module includes an active trigger power supply and a backup power supply, which are electrically connected to the trigger module in parallel. The active trigger power supply is located outside the integrated shunt excitation device, and the backup power supply is located inside the integrated shunt excitation device.

5. The integrated diverter excitation device according to claim 4, characterized in that: The backup power source is a capacitor or a battery.

6. The integrated diverter excitation device according to claim 1, characterized in that: An arc-extinguishing fuse is connected in parallel to the conductive member, and two ends of the arc-extinguishing fuse are conductively connected to two ends of the portion of the conductive member to be disconnected; the arc-extinguishing fuse is inserted into a medium filled with an arc-extinguishing medium.

7. The integrated diverter excitation device according to claim 1, characterized in that: The trigger module is electrically connected to the shunt connector through a connector so that the shunt element sends a monitored current signal to the trigger module.

8. The integrated diverter excitation device according to any one of claims 1 to 7, characterized in that: The trigger module includes a control chip and an electronic switch; the electronic switch, active trigger power supply and electronic ignition component are connected in series to form a trigger circuit, the control chip is electrically connected to the electronic switch to control the opening and closing of the electronic switch; when in the initial and normal working state, the electronic switch is disconnected and the trigger circuit is not conductive; the shunt element is electrically connected to the control chip to provide the control chip with a monitoring current signal, and the control chip determines whether the received current signal exceeds a set threshold value. When the set threshold value is exceeded, the control chip controls the electronic switch to close, the trigger circuit is conductive, and a passive trigger signal is sent to the electronic ignition component. signal; the shunt element can be connected to the control system of the user end through the trigger module, and provide the control system with a current signal for real-time monitoring; the electronic switch can also be electrically connected to the control system of the user end, and the opening and closing of the electronic switch is controlled by the control system of the user end. When the monitored current signal exceeds the set threshold or an abnormal situation occurs, the control system can control the electronic switch to close, so that the trigger circuit is turned on, and an active trigger signal is sent to the electronic ignition component; the electronic ignition component is actuated according to the trigger signal received first, releasing high-pressure gas, and driving the piston to disconnect the conductive part from the shunt element.

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