Exploding active fuse circuit and diagnostic method

Abstract

This invention discloses an explosive active fuse circuit and diagnostic method, comprising: a control module, a first switching circuit, a drive power module, an explosive fuse module, a second switching circuit, a first detection circuit, and a second detection circuit. The drive power module is connected to the input terminal of the first switching circuit, the output terminal of the first switching circuit is connected to the input terminal of the explosive fuse module, the output terminal of the explosive fuse module is connected to the input terminal of the second switching circuit, and the output terminal of the second switching circuit is grounded. The control module is connected to the control terminals of both the first and second switching circuits. The input terminal of the first detection circuit is connected to the input terminal of the explosive fuse module, the output terminal of the first detection circuit is connected to the input terminal of the control module, the input terminal of the second detection circuit is connected to the output terminal of the explosive fuse module, the output terminal of the second detection circuit is connected to the input terminal of the control module, and the output terminal of the control module is connected to the control terminals of both the first and second detection circuits.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to an explosive active fuse circuit and diagnostic method. Background Technology

[0002] Traditional high-voltage circuit short-circuit protection in new energy vehicles uses fuses. Fuses have limitations: large fusing current, long fusing time, and uncontrollable fusing moment. Their fusing process is only related to the current. Therefore, when a new energy vehicle needs protection and circuit disconnection, the fuse cannot effectively protect the high-voltage circuit due to these limitations, leading to overcurrent and even safety accidents. With the booming development of electric vehicles in the new energy field, a rapid and controllable explosive active fuse has overcome the shortcomings of fuses and is gaining increasing popularity and widespread application in new energy vehicles.

[0003] However, in the existing technology, the driving method of the explosive active safety device follows the ignition method of the vehicle airbag. The driving circuit of the explosive active safety device is relatively complex. In addition, if the driving circuit is to be checked to see if it is working properly, the driving circuit needs to be closed. However, closing the driving circuit will ignite the explosive active safety device. The explosive active safety device cannot be reused. Therefore, the driving circuit cannot be diagnosed. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an explosive active fuse circuit and a diagnostic method, which can solve the problem that existing explosive active fuse circuits are relatively complex and cannot be diagnosed.

[0005] According to a first aspect of the present invention, an explosive active fuse circuit includes: a control module; a first switching circuit, the output terminal of the control module being connected to the control terminal of the first switching circuit for controlling the on / off state of the first switching circuit; a drive power supply module, the output terminal of the drive power supply module being connected to the input terminal of the first switching circuit; an explosive fuse module, the output terminal of the first switching circuit being connected to the input terminal of the explosive fuse module; and a second switching circuit, the output terminal of the explosive fuse module being connected to the input terminal of the second switching circuit, the output terminal of the second switching circuit being grounded, the output terminal of the control module being connected to the control terminal of the second switching circuit for controlling the on / off state of the second switching circuit, the control module controlling the first switching circuit and the second switching circuit. The circuit simultaneously closes to detonate the explosion fuse module; a first detection circuit, the input terminal of which is connected to the input terminal of the explosion fuse module to detect the input voltage of the explosion fuse module, the output terminal of which is connected to the input terminal of the control module, and the output terminal of the control module is connected to the control terminal of the first detection circuit to control the on / off state of the first detection circuit; a second detection circuit, the input terminal of which is connected to the output terminal of the explosion fuse module to detect the output voltage of the explosion fuse module, the output terminal of which is connected to the input terminal of the control module, and the output terminal of the control module is connected to the control terminal of the second detection circuit to control the on / off state of the second detection circuit.

[0006] The explosion-proof active fuse circuit according to the first aspect of the present invention has at least the following advantages:

[0007] The control module controls the first detection circuit and the second switch circuit to close, and the control module controls the second detection circuit and the first switch circuit to open. The first detection circuit detects a first voltage, and the second detection circuit detects a second voltage. The first voltage is the input voltage of the explosion fuse module, and the second voltage is the output voltage of the explosion fuse module. If the first voltage is a first preset value and the second voltage is a second preset value, then the first detection circuit and the second switch circuit are confirmed to be functioning normally. The control module then controls the first detection circuit and the second switch circuit to close, and the control module controls the first switch circuit and the second switch circuit to open. The first detection circuit detects the first voltage, and the second detection circuit detects the second voltage. If the first voltage is a first preset value and the second voltage is a third preset value, then the second detection circuit and the second switch circuit are confirmed to be functioning normally. The control module then controls the second detection circuit to close. When the detection circuit and the first switch circuit are closed, the control module controls the first detection circuit and the second switch circuit to open. The first detection circuit detects the first voltage, and the second detection circuit detects the second voltage. If the first voltage is a first preset value and the second voltage is a third preset value, then the first switch circuit is confirmed to be functioning normally. By switching the on / off states of the first detection circuit, the second detection circuit, the first switch circuit, and the second switch circuit, different loops are formed to detect the voltage values ​​at the input and output terminals of the explosion fuse module under corresponding conditions. Based on the first preset value, the second preset value, and the third preset value, it is determined whether the functions of the first detection circuit, the second detection circuit, the first switch circuit, and the second switch circuit are normal, thus realizing the circuit diagnosis function. When the control module controls the first switch circuit and the second switch circuit to close simultaneously, the explosion fuse module is detonated. The driving method is simple.

[0008] According to some embodiments of the present invention, the first detection circuit includes a first transistor, a diode, a first resistor, and a second resistor. The output terminal of the control module is connected to the base of the first transistor, the collector of the first transistor is connected to the anode of the diode, the cathode of the diode is connected to the input terminal of the fuse module, the cathode of the diode is connected to one end of the first resistor, the other end of the first resistor is connected to the input terminal of the control module, and the other end of the first resistor is grounded through the second resistor.

[0009] According to some embodiments of the present invention, the first detection circuit further includes a second transistor, wherein the collector of the first transistor is connected to the base of the second transistor, and the collector of the second transistor is connected to the positive terminal of the diode.

[0010] According to some embodiments of the present invention, the second detection circuit includes a third resistor and a fourth resistor, the output terminal of the explosion protection module is connected to one end of the third resistor, the other end of the third resistor is connected to the input terminal of the control module, and the other end of the third resistor is grounded through the fourth resistor.

[0011] According to some embodiments of the present invention, the first switching circuit includes an intelligent high-side switch, and the output terminal of the control module is connected to the control terminal of the intelligent high-side switch.

[0012] According to a second aspect of the present invention, a diagnostic method for an explosive active fuse circuit includes the following steps: closing a first detection circuit and a second switching circuit, disconnecting the second detection circuit and the first switching circuit, acquiring a first voltage and a second voltage, wherein the first voltage is the input voltage of the explosive fuse module, and the second voltage is the output voltage of the explosive fuse module; if the first voltage is a first preset value and the second voltage is a second preset value, then the first detection circuit and the second switching circuit are confirmed to be functioning normally; closing the first detection circuit and the second detection circuit, disconnecting the first switching circuit and the second switching circuit, acquiring the first voltage and the second voltage; if the first voltage is the first preset value and the second voltage is a third preset value, then the second detection circuit and the second switching circuit are confirmed to be functioning normally; closing the second detection circuit and the first switching circuit, disconnecting the first detection circuit and the second switching circuit, acquiring the first voltage and the second voltage; if the first voltage is the first preset value and the second voltage is the third preset value, then the first switching circuit is confirmed to be functioning normally.

[0013] The method for diagnosing explosive active fuse circuits according to a second aspect embodiment of the present invention has at least the following beneficial effects:

[0014] The control module controls the first detection circuit and the second switch circuit to close, and the control module controls the second detection circuit and the first switch circuit to open. The first detection circuit detects a first voltage, and the second detection circuit detects a second voltage. The first voltage is the input voltage of the explosion fuse module, and the second voltage is the output voltage of the explosion fuse module. If the first voltage is a first preset value and the second voltage is a second preset value, then the first detection circuit and the second switch circuit are confirmed to be functioning normally. The control module then controls the first detection circuit and the second switch circuit to close, and the control module controls the first switch circuit and the second switch circuit to open. The first detection circuit detects the first voltage, and the second detection circuit detects the second voltage. If the first voltage is a first preset value and the second voltage is a third preset value, then the second detection circuit and the second switch circuit are confirmed to be functioning normally. The control module then controls the second detection circuit to close. When the detection circuit and the first switch circuit are closed, the control module controls the first detection circuit and the second switch circuit to open. The first detection circuit detects the first voltage, and the second detection circuit detects the second voltage. If the first voltage is a first preset value and the second voltage is a third preset value, then the first switch circuit is confirmed to be functioning normally. By switching the on / off states of the first detection circuit, the second detection circuit, the first switch circuit, and the second switch circuit, different loops are formed to detect the voltage values ​​at the input and output terminals of the explosion fuse module under corresponding conditions. Based on the first preset value, the second preset value, and the third preset value, it is determined whether the functions of the first detection circuit, the second detection circuit, the first switch circuit, and the second switch circuit are normal, thus realizing the circuit diagnosis function. When the control module controls the first switch circuit and the second switch circuit to close simultaneously, the explosion fuse module is detonated. The driving method is simple.

[0015] According to some embodiments of the present invention, the first preset value is the output voltage of the drive power supply.

[0016] According to some embodiments of the present invention, the second preset value is 0V.

[0017] According to some embodiments of the present invention, the calculation formula for the third preset value is: W2=V1*RB / (RB+r), where W2 is the third preset value, V1 is the output voltage of the driving power supply, RB is the internal resistance of the second detection circuit, and r is the internal resistance of the explosion protection module.

[0018] According to some embodiments of the present invention, before closing the first detection circuit and the second switch circuit and disconnecting the second detection circuit and the first switch circuit, the method further includes: disconnecting the first detection circuit, the second detection circuit, the first switch circuit and the second switch circuit, obtaining the first voltage and the second voltage, and if the first voltage and the second voltage are both second preset values, then it is preliminarily confirmed that the overall function of the circuit is normal.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of the explosive active fuse circuit of the present invention;

[0022] Figure 2 This is a schematic diagram showing the connection between the control module and the first detection circuit of the present invention;

[0023] Figure 3 This is a schematic diagram showing the connection between the control module and the second detection circuit of the present invention.

[0024] Figure 4 This is a schematic diagram showing the connection of the control module, the first switching circuit, the second switching circuit, and the explosion protection module of the present invention.

[0025] Figure 5 This is a circuit diagram of the first detection circuit of the present invention;

[0026] Figure 6 This is a circuit diagram of the second detection circuit of the present invention;

[0027] Figure 7 This is a flowchart of the diagnostic method for the explosive active fuse circuit of the present invention.

[0028] Figure label:

[0029] Control module 100

[0030] First switching circuit 200,

[0031] Drive power module 300,

[0032] Explosion safety module 400

[0033] Second switching circuit 500

[0034] First detection circuit 600

[0035] Second detection circuit 700. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0038] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0039] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0040] The following reference Figures 1 to 7 This invention describes an explosive active fuse circuit and a diagnostic method according to embodiments of the present invention.

[0041] like Figure 1 As shown, the explosion-proof active fuse circuit according to a first aspect embodiment of the present invention includes: a control module 100, a first switching circuit 200, a drive power supply module 300, an explosion-proof fuse module 400, a second switching circuit 500, a first detection circuit 600, and a second detection circuit 700, as follows. Figure 4 As shown, the output terminal of the control module 100 is connected to the control terminal of the first switching circuit 200. The control module 100 sends a control signal Ctl3 to control the on / off state of the first switching circuit 200. The output terminal of the drive power module 300 is connected to the input terminal of the first switching circuit 200. The output terminal of the first switching circuit 200 is connected to the input terminal of the explosion fuse module 400. The output terminal of the explosion fuse module 400 is connected to the input terminal of the second switching circuit 500. The output terminal of the second switching circuit 500 is grounded. Figure 4 As shown, the control module 100 is connected to the control terminal of the second switching circuit 500. The control module 100 sends a control signal Ctl4 to control the on / off state of the second switching circuit 500, such as... Figure 2As shown, the input terminal of the first detection circuit 600 is connected to the input terminal of the explosion fuse module 400 to detect the input voltage of the explosion fuse module 400. The first detection circuit 600 feeds back a voltage signal ADC1 to the control module 100. The output terminal of the first detection circuit 600 is connected to the input terminal of the control module 100, and the output terminal of the control module 100 is connected to the control terminal of the first detection circuit 600. The control module 100 sends a control signal Ctl1 to control the on / off state of the first detection circuit 600. The input terminal of the second detection circuit 700 is connected to the output terminal of the explosion fuse module 400 to detect the output voltage of the explosion fuse module 400. The second detection circuit 700 feeds back a voltage signal ADC2 to the control module 100. Figure 3 As shown, the output terminal of the second detection circuit 700 is connected to the input terminal of the control module 100, and the output terminal of the control module 100 is connected to the control terminal of the second detection circuit 700. The control module 100 sends a control signal Ctl2 to control the on / off state of the second detection circuit 700. The control module 100 is an MCU, but a PLC can also be used instead.

[0042] The control module employs an explosive active fuse circuit diagnostic method for circuit diagnosis. This method includes the following steps:

[0043] S100: Close the first detection circuit 600 and the second switch circuit 500, and disconnect the second detection circuit 700 and the first switch circuit 200. Drive the power supply module 300, the first detection circuit 600, the explosion fuse module 400 and the second switch circuit 500 to form a loop. Obtain the first voltage and the second voltage. The first voltage is the input voltage of the explosion fuse module 400 and the second voltage is the output voltage of the explosion fuse module 400. If the first voltage is the first preset value and the second voltage is the second preset value, then the first detection circuit 600 and the second switch circuit 500 are confirmed to be functioning normally.

[0044] S200: Close the first detection circuit 600 and the second detection circuit 700, and disconnect the first switch circuit 200 and the second switch circuit 500. Drive the power supply module 300, the first detection circuit 600, the explosion fuse module 400 and the second detection circuit 700 to form a loop, and obtain the first voltage and the second voltage. If the first voltage is the first preset value and the second voltage is the third preset value, then confirm that the second detection circuit 700 and the second switch circuit 500 are functioning normally.

[0045] S300: Close the second detection circuit 700 and the first switch circuit 200, and disconnect the first detection circuit 600 and the second switch circuit 500. Drive the power supply module 300, the first switch circuit 200, the explosion fuse module 400 and the second detection circuit 700 to form a loop, and obtain the first voltage and the second voltage. If the first voltage is the first preset value and the second voltage is the third preset value, then confirm that the first switch circuit 200 is functioning normally.

[0046] The control module 100 controls the first detection circuit 600 and the second switch circuit 500 to close, and controls the second detection circuit 700 and the first switch circuit 200 to open. The first detection circuit 600 detects a first voltage, and the second detection circuit 700 detects a second voltage. The first voltage is the input voltage of the explosion fuse module 400, and the second voltage is the output voltage of the explosion fuse module 400. If the first voltage is a first preset value and the second voltage is a second preset value, then the first detection circuit 600 and the second switch circuit 500 are confirmed to be functioning normally. The control module 100 then controls the first detection circuit 600 and the second detection circuit 700 to close, and controls the first switch circuit 200 and the second switch circuit 500 to open. The first detection circuit 600 detects the first voltage, and the second detection circuit 700 detects the second voltage. If the first voltage is a first preset value and the second voltage is a third preset value, then the second detection circuit 700 and the second switch circuit 500 are confirmed to be functioning normally. The control module 100 then controls the second detection circuit 700 and the first switch circuit 200 to close. The control module 100 controls the first detection circuit 600 and the second switch circuit 500 to disconnect. The first detection circuit 600 detects a first voltage, and the second detection circuit 700 detects a second voltage. If the first voltage is a first preset value and the second voltage is a third preset value, then the first switch circuit 200 is confirmed to be functioning normally. By switching the on / off states of the first detection circuit 600, the second detection circuit 700, the first switch circuit 200, and the second switch circuit 500, different loops are formed to detect the voltage values ​​of the input and output terminals of the explosion fuse module 400 under corresponding conditions. Based on the first preset value, the second preset value, and the third preset value, it is determined whether the functions of the first detection circuit 600, the second detection circuit 700, the first switch circuit 200, and the second switch circuit 500 are normal, thus realizing the circuit diagnosis function. When the control module 100 controls the first switch circuit 200 and the second switch circuit 500 to close simultaneously, the explosion fuse module 400 is detonated. The driving method is simple, and the dual-path driving method of the first switch circuit 200 and the second switch circuit 500 is adopted to ensure that the explosion fuse module 400 will not be accidentally detonated, thus ensuring high safety.

[0047] like Figure 5As shown, the first detection circuit 600 includes a first transistor Q1, a second transistor Q2, a diode Q3, a first resistor R4, and a second resistor R5. The output terminal of the control module 100 is connected to the base of the first transistor. The collector of the first transistor Q1 is connected to the base of the second transistor Q2. The collector of the second transistor Q2 is connected to the anode of the diode Q3. The cathode of the diode Q3 is connected to the input terminal of the fuse module 400. The cathode of the diode Q3 is connected to one end of the first resistor R4. The other end of the first resistor R4 is connected to the input terminal of the control module 100, feeding back a first voltage to the control module 100. The other end of the first resistor R4 is grounded through the second resistor R5. The control module 100 sends a control signal Ctl1 to control the conduction and cutoff of the first and second transistors. The first transistor Q1 and the second transistor Q2 provide overcurrent protection.

[0048] like Figure 6 As shown, the second detection circuit 700 includes a third resistor R6 and a fourth resistor R7. The output terminal of the explosion protection module 400 is connected to one end of the third resistor R6, and the other end of the third resistor R6 is connected to the input terminal of the control module 100 to feed back the second voltage to the control module 100. The other end of the third resistor R6 is grounded through the fourth resistor R7.

[0049] The first switching circuit 200 uses an intelligent high-side switch, and the second switching circuit 500 uses an intelligent low-side switch. The output terminal of the control module 100 is connected to the control terminal of the intelligent high-side switch, and the output terminal of the control module 100 is also connected to the control terminal of the intelligent low-side switch. The intelligent high-side switch has overcurrent / overtemperature protection functions. The model of the intelligent high-side switch is BTS7200, but other models can also be used. The first switching circuit 200 and the second switching circuit 500 can also use other types of switches, such as MOSFETs.

[0050] like Figure 7 As shown, the method for diagnosing an explosive active fuse circuit according to a second aspect embodiment of the present invention includes the following steps:

[0051] S100: Disconnect the first detection circuit 600, the second detection circuit 700, the first switch circuit 200, and the second switch circuit 500; obtain the first voltage and the second voltage; if both the first voltage and the second voltage are the second preset values, then it is preliminarily confirmed that the overall function of the circuit is normal.

[0052] S200: Close the first detection circuit 600 and the second switch circuit 500, and disconnect the second detection circuit 700 and the first switch circuit 200. Drive the power supply module 300, the first detection circuit 600, the explosion fuse module 400 and the second switch circuit 500 to form a loop. Obtain the first voltage and the second voltage. The first voltage is the input voltage of the explosion fuse module 400 and the second voltage is the output voltage of the explosion fuse module 400. If the first voltage is the first preset value and the second voltage is the second preset value, then the first detection circuit 600 and the second switch circuit 500 are confirmed to be functioning normally.

[0053] S300: Close the first detection circuit 600 and the second detection circuit 700, and disconnect the first switch circuit 200 and the second switch circuit 500. Drive the power supply module 300, the first detection circuit 600, the explosion fuse module 400 and the second detection circuit 700 to form a loop, and obtain the first voltage and the second voltage. If the first voltage is the first preset value and the second voltage is the third preset value, then confirm that the second detection circuit 700 and the second switch circuit 500 are functioning normally.

[0054] S400: Close the second detection circuit 700 and the first switch circuit 200, and disconnect the first detection circuit 600 and the second switch circuit 500. Drive the power supply module 300, the first switch circuit 200, the explosion fuse module 400 and the second detection circuit 700 to form a loop, and obtain the first voltage and the second voltage. If the first voltage is the first preset value and the second voltage is the third preset value, then the first switch circuit 200 is confirmed to be functioning normally.

[0055] The control module 100 controls the first detection circuit 600 and the second switch circuit 500 to close, and controls the second detection circuit 700 and the first switch circuit 200 to open. The first detection circuit 600 detects a first voltage, and the second detection circuit 700 detects a second voltage. The first voltage is the input voltage of the explosion fuse module 400, and the second voltage is the output voltage of the explosion fuse module 400. If the first voltage is a first preset value and the second voltage is a second preset value, then the first detection circuit 600 and the second switch circuit 500 are confirmed to be functioning normally. The control module 100 then controls the first detection circuit 600 and the second detection circuit 700 to close, and controls the first switch circuit 200 and the second switch circuit 500 to open. The first detection circuit 600 detects the first voltage, and the second detection circuit 700 detects the second voltage. If the first voltage is a first preset value and the second voltage is a third preset value, then the second detection circuit 700 and the second switch circuit 500 are confirmed to be functioning normally. The control module 100 then controls... The second detection circuit 700 and the first switch circuit 200 are closed. The control module 100 controls the first detection circuit 600 and the second switch circuit 500 to open. The first detection circuit 600 detects the first voltage, and the second detection circuit 700 detects the second voltage. If the first voltage is the first preset value and the second voltage is the third preset value, then the first switch circuit 200 is confirmed to be functioning normally. By switching the on / off states of the first detection circuit 600, the second detection circuit 700, the first switch circuit 200, and the second switch circuit 500, different loops are formed to detect the voltage values ​​of the input and output terminals of the explosion fuse module 400 under the corresponding conditions. Based on the first preset value, the second preset value, and the third preset value, it is determined whether the functions of the first detection circuit 600, the second detection circuit 700, the first switch circuit 200, and the second switch circuit 500 are normal, thus realizing the circuit diagnosis function. When the control module 100 controls the first switch circuit 200 and the second switch circuit 500 to close simultaneously, the explosion fuse module 400 is detonated. The driving method is simple.

[0056] The first preset value is the output voltage of the drive power supply, the second preset value is 0V, and the formula for calculating the third preset value is:

[0057] W2 = V1 * RB / (RB + r)

[0058] Wherein, W2 is the third preset value, V1 is the output voltage of the driving power supply, RB is the internal resistance of the second detection circuit 700, and r is the internal resistance of the explosion protection module 400.

[0059] It should be noted that, due to the detection accuracy issues of the first and second voltages, the first, second, and third preset values ​​can be range values.

[0060] It is understandable that when modifications are made to the first detection circuit 600, the second detection circuit 700, the first switch circuit 200 and / or the second switch circuit 500, the first preset value, the second preset value and the third preset value will change accordingly.

[0061] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An explosive active fuse circuit, characterized in that, include: Control module (100); The first switching circuit (200) is connected to the control terminal of the control module (100) to control the on / off state of the first switching circuit (200); A drive power module (300) is provided, the output of which is connected to the input of the first switching circuit (200). An explosion safety module (400) is provided, wherein the output terminal of the first switching circuit (200) is connected to the input terminal of the explosion safety module (400); The second switching circuit (500) has its output terminal connected to the input terminal of the explosion safety module (400), and its output terminal grounded. The output terminal of the control module (100) is connected to the control terminal of the second switching circuit (500) to control the on / off state of the second switching circuit (500). The control module controls the first switching circuit (200) and the second switching circuit (500) to simultaneously close and detonate the explosion safety module (400). A first detection circuit (600) is connected to the input of the explosion protection module (400) to detect the input voltage of the explosion protection module (400). The output of the first detection circuit (600) is connected to the input of the control module (100), and the output of the control module (100) is connected to the control terminal of the first detection circuit (600). The second detection circuit (700) has its input terminal connected to the output terminal of the explosion protection module (400) to detect the output voltage of the explosion protection module (400). The output terminal of the second detection circuit (700) is connected to the input terminal of the control module (100), and the output terminal of the control module (100) is connected to the control terminal of the second detection circuit (700).

2. The explosion-proof active fuse circuit according to claim 1, characterized in that: The first detection circuit (600) includes a first transistor, a second transistor, a diode, a first resistor, and a second resistor. The output terminal of the control module (100) is connected to the base of the first transistor, the collector of the first transistor is connected to the base of the second transistor, the collector of the second transistor is connected to the anode of the diode, the cathode of the diode is connected to the input terminal of the explosion fuse module (400), the cathode of the diode is connected to one end of the first resistor, the other end of the first resistor is connected to the input terminal of the control module (100), and the other end of the first resistor is grounded through the second resistor.

3. The explosion-proof active fuse circuit according to claim 1, characterized in that: The second detection circuit (700) includes a third resistor and a fourth resistor. The output terminal of the explosion protection module (400) is connected to one end of the third resistor, and the other end of the third resistor is connected to the input terminal of the control module (100). The other end of the third resistor is grounded through the fourth resistor.

4. The explosion-proof active fuse circuit according to claim 1, characterized in that: The first switching circuit (200) includes an intelligent high-side switch, and the output terminal of the control module (100) is connected to the control terminal of the intelligent high-side switch.

5. A diagnostic method for explosive active fuse circuits, characterized in that, The method, applied to the explosive active fuse circuit as described in any one of claims 1 to 4, comprises the following steps: Close the first detection circuit (600) and the second switch circuit (500), and disconnect the second detection circuit (700) and the first switch circuit (200). Obtain the first voltage and the second voltage. The first voltage is the input voltage of the explosion fuse module (400), and the second voltage is the output voltage of the explosion fuse module (400). If the first voltage is a first preset value and the second voltage is a second preset value, then the first detection circuit (600) and the second switch circuit (500) are confirmed to be functioning normally. Close the first detection circuit (600) and the second detection circuit (700), and disconnect the first switch circuit (200) and the second switch circuit (500). Obtain the first voltage and the second voltage. If the first voltage is the first preset value and the second voltage is the third preset value, then confirm that the second detection circuit (700) and the second switch circuit (500) are functioning normally. Close the second detection circuit (700) and the first switch circuit (200), and disconnect the first detection circuit (600) and the second switch circuit (500). Obtain the first voltage and the second voltage. If the first voltage is the first preset value and the second voltage is the third preset value, then confirm that the first switch circuit (200) is functioning normally.

6. The diagnostic method for explosive active fuse circuits according to claim 5, characterized in that: The first preset value is the output voltage of the drive power supply.

7. The diagnostic method for explosive active fuse circuits according to claim 5, characterized in that: The second preset value is 0V.

8. The diagnostic method for explosive active fuse circuits according to claim 5, characterized in that, The formula for calculating the third preset value is: W2=V1*RB / (RB+r), where W2 is the third preset value, V1 is the output voltage of the driving power supply, RB is the internal resistance of the second detection circuit (700), and r is the internal resistance of the explosion safety module (400).

9. The diagnostic method for explosive active fuse circuits according to claim 5, characterized in that, Before closing the first detection circuit (600) and the second switch circuit (500) and disconnecting the second detection circuit (700) and the first switch circuit (200), the method further includes: disconnecting the first detection circuit (600), the second detection circuit (700), the first switch circuit (200) and the second switch circuit (500), obtaining the first voltage and the second voltage, and if the first voltage and the second voltage are both the second preset value, then it is preliminarily confirmed that the overall function of the circuit is normal.

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