An actively triggerable fuse

Abstract

The utility model relates to electronic device technical field, specifically disclose a kind of active trigger type fuse, comprising: controlled conductive plate, controlled conductive plate is equipped with active cutout weak position;With the active cutout weak position opposite setting active electric breakdown mechanism;Active detonation circuit, the active detonation circuit is used to electrically connect external trigger signal to the active electric breakdown mechanism, to supply the active cutout weak position cutout by the external trigger signal.The active trigger type fuse provided by the utility model can effectively solve the problem that existing fuse cannot respond to external trigger signal active breaking circuit.

Description

Technical Field

[0001] This utility model relates to the field of electronic device technology, and in particular to an active triggerable fuse. Background Technology

[0002] With the rapid development of the new energy electric vehicle industry, the requirements for the safety and reliability of the vehicle's electrical system are increasing. As a key overcurrent protection device for the power system and battery pack, the performance of fuses directly affects the vehicle's operational safety and the protection effect of high-voltage circuits. Especially in the event of a collision, short circuit, or other fault conditions, the ability to quickly and reliably disconnect the circuit to prevent secondary disasters has become a core issue in system protection design.

[0003] Currently widely used fuses mainly operate based on the principle of current-induced thermal effect. When an overcurrent passes through them, the fusible element heats up due to the Joule heating effect, reaching its melting point and then melting to break the circuit. These fuses are passive protection devices; their operating characteristics directly depend on the thermal accumulation characteristics, geometry, and surrounding environmental conditions of the fusible element. Their fusing behavior is closely related to the magnitude and duration of the current.

[0004] However, in the actual operation of new energy vehicles, a new type of protection requirement exists: under certain sudden accident conditions (such as severe collisions), the system needs to immediately disconnect certain critical circuits (such as the high-voltage main circuit, energy storage unit output, etc.), even though the current in the relevant circuits may not have reached overcurrent or short-circuit levels, or may even be zero. For example, after a collision, to minimize the risks of electric shock, thermal runaway, or arcing, the battery management system or vehicle controller needs to immediately issue a command to forcibly disconnect the connection between the power battery and the load. However, traditional fuses cannot achieve rapid disconnection under zero-current or low-current conditions because their fuse mechanism essentially relies on the heat generated by the current itself. If the current is insufficient, it cannot provide enough energy to melt the fuse element, leading to protection failure or delay.

[0005] Therefore, existing fuses have significant limitations: they cannot actively fuse in response to external trigger signals (such as collision sensors or electronic control unit commands); furthermore, this indirectly results in their inability to achieve fast and reliable disconnection under zero-current or low-current conditions. This deficiency limits their widespread application in applications with high reliability requirements, such as new energy vehicles.

[0006] To address the aforementioned issues, existing fuses need to be improved to resolve their inability to actively disconnect the circuit in response to external trigger signals.

[0007] The information disclosed in this background section is included only to enhance the understanding of the context of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0008] One objective of this invention is to provide an actively triggered fuse that can effectively solve the problem that existing fuses cannot actively disconnect the circuit in response to external triggering signals.

[0009] To achieve the above objectives, this utility model provides an actively triggered fuse, comprising:

[0010] A controlled conductive plate, wherein the controlled conductive plate is provided with an active cutting-off weak part;

[0011] An active electro-induced interruption mechanism is provided opposite to the active cut-off weak part;

[0012] An active detonation circuit is used to electrically connect an external trigger signal to the active electro-interruption mechanism so that the external trigger signal can cut off the active interruption weak part.

[0013] Optionally, the external trigger signal is generated by an external trigger circuit, and the active detonation circuit includes a resistor R1 and a variable resistor D6;

[0014] The positive terminal B+ of the external trigger circuit, the resistor R1, the variable resistor D6, and the negative terminal B- of the external trigger circuit are connected in series to form a loop.

[0015] Specifically, one contact of the active electro-interruption mechanism is electrically connected to the end of the variable resistor D6 near the resistor R1, and the other contact of the active electro-interruption mechanism is electrically connected to the end of the variable resistor D6 near the negative electrode B-.

[0016] Optionally, the controlled conductive plate is further provided with a passively cut weak part and a fusion splice that electrically connects the actively cut weak part and the passively cut weak part;

[0017] The actively triggerable fuse also includes:

[0018] A passive electro-interruption mechanism is provided opposite to the passively cut-off weak point;

[0019] A passive detonation circuit is electrically connected to the fuse circuit of the passive electro-induced breakage mechanism when the fuse melts due to overcurrent, thereby triggering the passive electro-induced breakage mechanism to cut off the passively cut weak part and accelerate the complete breakage process of the controlled conductive plate.

[0020] Optionally, the passive detonation circuit includes:

[0021] A bridge rectifier circuit, wherein one AC input point of the bridge rectifier circuit is electrically connected to one end F+ of the fusion splice, and the other AC input point of the bridge rectifier circuit is electrically connected to the other end F- of the fusion splice;

[0022] Resistor R2, one end of which is electrically connected to one end F+ of the fusion splice;

[0023] Field-effect transistor Q1, the gate of the field-effect transistor Q1 is electrically connected to the other end of the resistor R2, and the drain of the field-effect transistor Q1 is electrically connected to the DC positive output point of the bridge rectifier circuit;

[0024] One of the contact points of the passive electro-interruption mechanism is electrically connected to the negative DC output point of the bridge rectifier circuit, and the other contact point of the passive electro-interruption mechanism is electrically connected to the source (S) terminal of the field-effect transistor Q1.

[0025] Optionally, the passive detonation circuit further includes:

[0026] Resistor R3, one end of which is electrically connected to the end of resistor R2 near the field-effect transistor Q1, and the other end of resistor R3 is electrically connected to the other end F- of the fusion splice.

[0027] Optionally, the passive detonation circuit further includes:

[0028] A variable resistor D5 is provided, with one end of the variable resistor D5 electrically connected to the negative DC output point of the bridge rectifier circuit, and the other end of the variable resistor D5 electrically connected to the source (S) terminal of the field-effect transistor Q1.

[0029] Optionally, the melting temperature of the welded piece is lower than the melting temperatures of both the actively cut weak part and the passively cut weak part.

[0030] Optionally, the active electro-interruption mechanism includes:

[0031] An insulating sliding head, which can slide relative to the controlled conductive plate;

[0032] An electro-detonator is located at the end of the insulation cutting head away from the controlled conductive plate, and is used to detonate upon energization to trigger the insulation cutting head to slide toward the controlled conductive plate until it cuts the controlled conductive plate.

[0033] Optionally, the electro-initiator is an explosive foil initiator, a thermal bridge wire initiator, an impact detonator, or an electrothermal chemical actuator.

[0034] The beneficial effects of this utility model are as follows: It provides an actively triggered fuse that generates an external trigger signal when an external triggering circuit, such as the Battery Management System (BMS), Vehicle Control Unit (VCU), or collision sensor detects a specific fault requiring immediate circuit disconnection (e.g., a severe collision). The specific transmission process of the external trigger signal is as follows:

[0035] (1) Signal reception and transmission: The external trigger signal is sent to the input terminal of the active detonation circuit. After receiving the external trigger signal, the active detonation circuit quickly guides it to the active electro-interruption mechanism and applies electrical energy to the active electro-interruption mechanism.

[0036] (2) Mechanism action: The active electro-interruption mechanism (which may be a miniature explosive, an electric heating element, or an electromagnetic drive device that generates huge mechanical force instantly) is activated instantly after receiving electrical energy, resulting in a violent energy release (such as a miniature explosion, rapid heating, or mechanical impact).

[0037] (3) Forced disconnection: The released energy is directly and concentratedly applied to the weak part of the active disconnection. Under the impact of this concentrated energy (e.g., through explosive cutting, arc ablation, or mechanical breaking), the weak part of the active disconnection is forcibly disconnected or destroyed in an instant.

[0038] (4) Circuit disconnection: The physical connection of the controlled conductive plate is forcibly interrupted, and the main circuit will be immediately and reliably disconnected regardless of the actual current in the circuit at this time (even if it is zero current or a small current state).

[0039] Therefore, the active triggerable fuse provided by this utility model can effectively solve the problem that existing fuses cannot actively disconnect the circuit in response to external trigger signals. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A schematic diagram of the structure of an actively triggered fuse provided in the embodiment;

[0042] Figure 2 The circuit structure diagrams of the active detonation circuit and the passive detonation circuit provided in the embodiment are shown.

[0043] In the picture:

[0044] 100. External trigger circuit;

[0045] 1. Controlled conductive plate; 101. Active cutting off weak points; 102. Passive cutting off weak points; 103. Welded splice;

[0046] 2a. Active electro-induced interruption mechanism; 2b. Passive electro-induced interruption mechanism; 201. Insulation slitting head; 202. Electro-induced detonator;

[0047] 3. Active detonation circuit;

[0048] 4. Passive detonation circuit. Detailed Implementation

[0049] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0050] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0051] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0052] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0053] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0054] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0055] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0056] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0057] The direct drive mechanism in this invention can be a linear motor, a cylinder, a hydraulic cylinder, or a motor lead screw and slider assembly, etc.; the rotary drive mechanism can be a servo motor, a stepper motor, or a rotary cylinder, etc.

[0058] See Figure 1 This embodiment provides an actively triggered fuse, including:

[0059] A controlled conductive plate 1 is provided with an active cutting weak part 101;

[0060] An active electro-induced interruption mechanism 2a is disposed opposite to the active interruption weak part 101;

[0061] Active detonation circuit 3 is used to electrically connect an external trigger signal to the active electro-interruption mechanism 2a, so that the external trigger signal can cut off the active cutting weak part 101.

[0062] The present invention provides an actively triggered fuse.

[0063] When an external trigger circuit 100, such as the Battery Management System (BMS), Vehicle Control Unit (VCU), or collision sensor, detects a specific fault requiring immediate circuit disconnection (e.g., a severe collision), it generates an external trigger signal. The specific transmission process of the external trigger signal is as follows:

[0064] (1) Signal reception and transmission: The external trigger signal is transmitted to the input terminal of the active detonation circuit 3. After receiving the external trigger signal, the active detonation circuit 3 quickly guides it to the active electro-interruption mechanism 2a and applies electrical energy to the active electro-interruption mechanism 2a.

[0065] (2) Mechanism action: The active electro-interruption mechanism 2a (which may be a miniature explosive, an electric heating element, or an electromagnetic drive device that generates huge mechanical force instantly) is activated instantly after receiving electrical energy, resulting in a violent energy release (such as a miniature explosion, rapid heating, or mechanical impact).

[0066] (3) Forced disconnection: The released energy is directly and concentratedly applied to the weak part 101 that is actively cut off. Under the impact of this concentrated energy (e.g., by explosive cutting, arc ablation, or mechanical breaking), the weak part 101 is forcibly cut off or destroyed instantly.

[0067] (4) Circuit disconnection: The physical connection of the controlled conductive plate 1 is forcibly interrupted. Regardless of the actual current in the circuit at this time (even if it is zero current or a small current state), the main circuit will be disconnected immediately and reliably.

[0068] Therefore, the active triggerable fuse provided by this utility model can effectively solve the problem that existing fuses cannot actively disconnect the circuit in response to external trigger signals.

[0069] In this embodiment, the external trigger signal is generated by the external trigger circuit 100.

[0070] See Figure 2 The active detonation circuit 3 includes a resistor R1 and a variable resistor D6;

[0071] The positive terminal B+ of the external trigger circuit 100, the resistor R1, the variable resistor D6, and the negative terminal B- of the external trigger circuit 100 are connected in series to form a circuit.

[0072] Specifically, one contact of the active electro-interruption mechanism 2a is electrically connected to the end of the variable resistor D6 near the resistor R1, and the other contact of the active electro-interruption mechanism 2a is electrically connected to the end of the variable resistor D6 near the negative electrode B-.

[0073] By setting up an active detonation circuit 3 consisting of resistor R1 and rheostat D6, the current and voltage from the external triggering circuit 100 can be effectively limited and regulated, ensuring that the electrical signal strength transmitted to the active electro-interrupting mechanism 2a is moderate and stable. This not only reliably triggers the mechanism to operate, but also prevents excessive current or voltage spikes from causing accidental damage or interference to the active electro-interrupting mechanism 2a or other circuits inside the fuse, thus improving the reliability and safety of the active triggering process.

[0074] In this embodiment, the controlled conductive plate 1 is further provided with a passively cut weak part 102 and a fusion piece 103 electrically connecting the actively cut weak part 101 and the passively cut weak part 102.

[0075] The actively triggerable fuse also includes:

[0076] A passive electro-interruption mechanism 2b is disposed opposite to the passively cut-off weak part 102;

[0077] The passive detonation circuit 4 is electrically connected to the fuse circuit of the fusion splice 103 to the passive electro-induced breakage mechanism 2b. When the fusion splice 103 is overcurrent-induced to melt, the passive electro-induced breakage mechanism 2b is triggered to cut off the passively cut weak part 102, thereby accelerating the complete breakage process of the controlled conductive plate 1.

[0078] By adding a passively cut-off weak point 102, a fusion splice 103, a corresponding passive electro-induced interruption mechanism 2b, and a passive detonation circuit 4, a passive, current-thermal-effect-based accelerated interruption mechanism is constructed. When the controlled conductive plate 1 begins to melt due to overcurrent, the preemptive melting of the fusion splice 103 triggers the passive detonation circuit 4, which in turn drives the passive electro-induced interruption mechanism 2b to instantly cut off the passively cut-off weak point 102. This forcibly accelerates the overall separation speed of the controlled conductive plate 1, its main purpose being to greatly shorten the time required for arc combustion and extinguishing, effectively promoting the rapid extinguishing of the arc, thereby enhancing the arc-extinguishing capability and safety performance of the fuse when interrupting large fault currents.

[0079] Optionally, the passive detonation circuit 4 includes:

[0080] A bridge rectifier circuit (composed of diodes D1, D2, D3, and D4) has one AC input point electrically connected to one end F+ of the fusion splice 103 and the other AC input point electrically connected to the other end F- of the fusion splice 103.

[0081] Resistor R2, one end of which is electrically connected to one end F+ of the fusion splice 103;

[0082] Field-effect transistor Q1, the gate of the field-effect transistor Q1 is electrically connected to the other end of the resistor R2, and the drain of the field-effect transistor Q1 is electrically connected to the DC positive output point of the bridge rectifier circuit;

[0083] One of the contact points of the passive electro-interruption mechanism 2b is electrically connected to the negative DC output point of the bridge rectifier circuit, and the other contact point of the passive electro-interruption mechanism 2b is electrically connected to the source (S) terminal of the field-effect transistor Q1.

[0084] Furthermore, the passive detonation circuit 4 also includes:

[0085] Resistor R3, one end of which is electrically connected to the end of resistor R2 near the field-effect transistor Q1, and the other end of resistor R3 is electrically connected to the other end F- of the fusion splice 103;

[0086] A variable resistor D5 is provided, with one end of the variable resistor D5 electrically connected to the negative DC output point of the bridge rectifier circuit, and the other end of the variable resistor D5 electrically connected to the source (S) terminal of the field-effect transistor Q1.

[0087] In this embodiment, the passive detonation triggering process is as follows:

[0088] Under normal circumstances, F+ and F- are in a conductive state, and the entire passive detonation circuit 4 is equivalent to being short-circuited by the fusion splice 103. No current is generated inside the passive detonation circuit 4, so the passive electro-induced interruption mechanism 2b will not be triggered to perform the cut-off action.

[0089] When the controlled conductive plate 1 melts due to overcurrent, a voltage difference signal is generated between F+ and F-. This voltage difference signal will connect the field effect transistor Q1 through resistor R2, thereby forming a circuit between the two energized contacts of the passive electro-interruption mechanism 2b. When the current flows through the passive electro-interruption mechanism 2b, it triggers the passive electro-interruption mechanism 2b to operate and directly cut off the passively cut weak part 102.

[0090] In the circuit structure described above, resistor R3 is connected to the gate of MOSFET Q1, serving to suppress floating signals. The bridge rectifier circuit utilizes the unidirectional conductivity of diodes to isolate the electrical properties of the trigger circuit and fuse. The subsequent variable resistor D5 suppresses transient voltages, while resistor R4 provides the default state.

[0091] In this embodiment, the active detonation triggering process is as follows:

[0092] When triggered externally, the external trigger signal sent by the external trigger circuit 100 (e.g., BMS) is current-limited and voltage-limited by resistor R1 and variable resistor D6, and then connected to the active electro-interruption mechanism 2a, so that the active electro-interruption mechanism 2a and the external trigger circuit 100 form a path. After the current flows through the active electro-interruption mechanism 2a, it triggers the active electro-interruption mechanism 2a to perform an action, thereby cutting off the active interruption weak part 101, realizing the forced interruption control of the active triggerable fuse by the external trigger signal.

[0093] In summary, internal triggering (passive) and external triggering (active) form dual protection, further enhancing the comprehensiveness and response speed of circuit protection.

[0094] In this embodiment, the melting temperature of the welded piece 103 is lower than the melting temperatures of both the actively cut-off weak portion 101 and the passively cut-off weak portion 102. For example, the melting point of the material of the welded piece 103 is lower than that of the material of the weak portion, or the material of the welded piece 103 and the weak portion is the same, but the cross-sectional area of ​​the welded piece 103 is smaller. This ensures that when an overcurrent fault occurs, the welded piece 103 will melt before the two weak portions, thereby generating the differential pressure signal to trigger the passive accelerated cut-off mechanism first. This ensures that the passive accelerated mechanism can be activated in a timely and reliable manner, which is a key prerequisite for realizing the rapid disconnection and accelerated arc extinguishing functions.

[0095] In this embodiment, the active electro-interruption mechanism 2a includes:

[0096] An insulating sliding head 201 is slidable relative to the controlled conductive plate 1.

[0097] An electro-detonator 202 is located at the end of the insulation cutting head 201 away from the controlled conductive plate 1. It is used to detonate after being energized, so as to trigger the insulation cutting head 201 to slide toward the controlled conductive plate 1 to cut off the controlled conductive plate 1.

[0098] Utilizing the immense instantaneous energy generated by the explosion of the electro-initiator 202, the active cutting weak point 101 is rapidly and forcefully severed by the insulated cutting head 201 through mechanical impact. This method has extremely fast operating speed, strong breaking capacity, and is not limited by the magnitude of the main circuit current. It can operate reliably even in a zero-current state, achieving true forced physical breaking.

[0099] Optionally, the passive electro-interruption mechanism 2b has the same structure as the active electro-interruption mechanism 2a, and this embodiment will not elaborate on this.

[0100] Optionally, the electro-initiator 202 may be an explosive foil initiator, a thermal bridge wire initiator, an impact detonator, or an electrothermal chemical actuator, etc. The specific structure and detonation principle of the electro-initiator 202 are not the focus of this embodiment, so they will not be described in detail.

[0101] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. An actively triggered fuse, characterized in that, include: Controlled conductive plate (1), wherein the controlled conductive plate (1) is provided with an active cutting weak part (101). An active electro-interruption mechanism (2a) is provided opposite to the active cutting weak part (101); Active detonation circuit (3) is used to electrically connect an external trigger signal to the active electro-interruption mechanism (2a) so that the external trigger signal can cut off the active interruption weak part (101).

2. The actively triggered fuse according to claim 1, characterized in that, The external trigger signal is generated by the external trigger circuit (100), and the active detonation circuit (3) includes a resistor R1 and a variable resistor D6; The positive terminal B+ of the external trigger circuit (100), the resistor R1, the variable resistor D6, and the negative terminal B- of the external trigger circuit (100) are connected in series to form a circuit. One of the contact points of the active electro-interruption mechanism (2a) is electrically connected to the end of the variable resistor D6 near the resistor R1, and the other contact point of the active electro-interruption mechanism (2a) is electrically connected to the end of the variable resistor D6 near the negative electrode B-.

3. The actively triggered fuse according to claim 1, characterized in that, The controlled conductive plate (1) is also provided with a passively cut weak part (102) and a fusion piece (103) that electrically connects the actively cut weak part (101) and the passively cut weak part (102). The actively triggerable fuse also includes: A passive electro-interruption mechanism (2b) is provided opposite to the passively cut-off weak part (102); The passive detonation circuit (4) is electrically connected to the fuse circuit of the passive electro-interruption mechanism (2b) when the fuse (103) melts due to overcurrent, and is used to trigger the passive electro-interruption mechanism (2b) to cut off the passively cut weak part (102) to accelerate the complete breakage process of the controlled conductive plate (1).

4. The actively triggered fuse according to claim 3, characterized in that, The passive detonation circuit (4) includes: A bridge rectifier circuit, wherein one AC input point of the bridge rectifier circuit is electrically connected to one end F+ of the fusion splice (103), and the other AC input point of the bridge rectifier circuit is electrically connected to the other end F- of the fusion splice (103); Resistor R2, one end of which is electrically connected to one end F+ of the fusion splice (103); Field-effect transistor Q1, the gate of the field-effect transistor Q1 is electrically connected to the other end of the resistor R2, and the drain of the field-effect transistor Q1 is electrically connected to the DC positive output point of the bridge rectifier circuit; One of the contact points of the passive electro-interruption mechanism (2b) is electrically connected to the DC negative output point of the bridge rectifier circuit, and the other contact point of the passive electro-interruption mechanism (2b) is electrically connected to the S terminal of the field-effect transistor Q1.

5. The actively triggered fuse according to claim 4, characterized in that, The passive detonation circuit (4) also includes: Resistor R3, one end of which is electrically connected to the end of resistor R2 near the field-effect transistor Q1, and the other end of resistor R3 is electrically connected to the other end F- of the fusion splice (103).

6. The actively triggered fuse according to claim 4, characterized in that, The passive detonation circuit (4) also includes: A variable resistor D5 is provided, with one end of the variable resistor D5 electrically connected to the negative DC output point of the bridge rectifier circuit, and the other end of the variable resistor D5 electrically connected to the source (S) terminal of the field-effect transistor Q1.

7. The actively triggered fuse according to claim 3, characterized in that, The melting temperature of the welded piece (103) is lower than the melting temperatures of both the actively cut weak part (101) and the passively cut weak part (102).

8. The actively triggered fuse according to claim 1, characterized in that, The active electro-interruption mechanism (2a) includes: An insulating sliding head (201) is available for sliding relative to the controlled conductive plate (1). An electro-detonator (202) is located at the end of the insulation cutting head (201) away from the controlled conductive plate (1) and is used to detonate after being energized, so as to trigger the insulation cutting head (201) to slide toward the controlled conductive plate (1) to cut off the controlled conductive plate (1).

9. The actively triggered fuse according to claim 8, characterized in that, The electro-initiator (202) is an explosive foil initiator, a thermal bridge wire initiator, an impact detonator, or an electrothermal chemical actuator.

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