Anti-sparking circuit and detector equipment

Abstract

The invention discloses an anti-sparking circuit and detector equipment, and relates to the field of circuit protection. The anti-sparking circuit comprises a DC connector J1, a PMOS tube U1, a PMOS tube U2, an AND gate chip U3, a charging interface J2, resistors R1-R8, a voltage stabilizing diode D1, a diode D2 and a triode Q1. Wherein the first pin and the third pin of the DC connector J1 are used for insertion connection of a charger outside the detector equipment. When the charger is not completely inserted into the DC connector J1, the third pin of the DC connector J1 is connected with the second pin, at the moment, due to the arrangement of the AND gate chip U3, the charger and the rechargeable battery are not conducted, and no spark is generated. Only when the charger is completely inserted into the DC connector J1 and the third pin and the second pin of the DC connector J1 are disconnected, the charger can be connected with the rechargeable battery to start charging, so that plug-and-play charging is realized, and the charging waiting time is not prolonged.

Description

Technical Field

[0001] The present application relates to the field of circuit protection technology, and in particular to an anti-spark circuit and a detector device. Background Art

[0002] Existing portable gas detectors use 24V lithium batteries inside. When charging with an external charger, sparks will appear on the charging interface. The reason is that the current at the contact point is too large when the connector is connected. To solve this sparking problem, there are currently several solutions. One solution is to use RC resistors and capacitors to form a delay circuit. When the charger is inserted, the charging power supply is turned on with a delay. This method can easily cause sparks when the charger is quickly and repeatedly plugged in and out. Another solution is to use a current limiting resistor to limit the generation of charging sparks by reducing the charging current. Although this method is simple, it will limit the charging current, resulting in a longer charging time, which is extremely unfriendly to users. Summary of the invention

[0003] In view of the problems existing in the above prior art, the purpose of this application is to provide an anti-spark circuit and a detector device, which can effectively prevent the generation of charging sparks and will not prolong the charging waiting time.

[0004] To achieve the above objectives, this application provides the following solutions.

[0005] On the one hand, the present application provides an anti-sparking circuit, including: a DC connector J1, a PMOS tube U1, a PMOS tube U2, an AND gate chip U3, a charging interface J2, resistors R1-R8, a voltage regulator diode D1, a diode D2, and a transistor Q1; The first pin of the DC connector J1 is respectively connected to the drain of the PMOS tube U1 and one end of the resistor R1; the other end of the resistor R1 is respectively connected to one end of the resistor R2, the cathode of the voltage stabilizing diode D1, one end of the resistor R4, the first input pin of the AND gate chip U3 and the power pin of the AND gate chip U3; the second pin of the DC connector J1 is connected to the power ground; the third pin of the DC connector J1 is respectively connected to the other end of the resistor R2, one end of the resistor R3 and the second input pin of the AND gate chip U3; the other end of the resistor R3, the anode of the voltage stabilizing diode D1, the other end of the resistor R4 and the ground pin of the AND gate chip U3 are all connected to the power ground; the output pin of the AND gate chip U3 is connected to the anode of the diode D2 ; The cathode of the diode D2 is connected to one end of the resistor R5; the other end of the resistor R5 is respectively connected to one end of the resistor R6 and the base of the transistor Q1; the other end of the resistor R6 and the emitter of the transistor Q1 are connected to the power ground; the collector of the transistor Q1 is connected to one end of the resistor R7; the other end of the resistor R7 is respectively connected to the gate of the PMOS tube U1, the gate of the PMOS tube U2 and one end of the resistor R8; the other end of the resistor R8 is respectively connected to the source of the PMOS tube U1 and the source of the PMOS tube U2; the drain of the PMOS tube U2 is connected to the first pin of the charging interface J2; the second pin of the charging interface J2 is connected to the power ground; the charging interface J2 is also connected to the rechargeable battery inside the detector; The first pin and the third pin of the DC connector J1 are used for connection with a charger outside the detector device; when the charger is not inserted or not fully inserted into the DC connector J1, the third pin of the DC connector J1 is connected to the second pin of the DC connector J1; when the charger is fully inserted into the DC connector J1, the third pin of the DC connector J1 is disconnected from the second pin of the DC connector J1.

[0006] Optionally, when the charger is not fully inserted into the DC connector J1, the third pin of the DC connector J1 is connected to the second pin of the DC connector J1, the first input pin of the AND gate chip U3 is at a high level, the second input pin of the AND gate chip U3 is at a low level, the output pin of the AND gate chip U3 outputs a low level, the transistor Q1 is cut off, the PMOS tube U1 and the PMOS tube U2 are not conducting, and the charger is not conducting with the rechargeable battery.

[0007] Optionally, when the charger is fully inserted into the DC connector J1, the third pin of the DC connector J1 is disconnected from the second pin of the DC connector J1, the first input pin of the AND gate chip U3 and the second input pin of the AND gate chip U3 are both high level, the output pin of the AND gate chip U3 outputs a high level, the transistor Q1 is turned on, the PMOS tube U1 and the PMOS tube U2 are also turned on, and the charger is connected to the rechargeable battery to start charging.

[0008] Optionally, the anti-spark circuit also includes: a transistor Q2, resistors R9~R11 and an MCU chip; the base of the transistor Q2 is connected to one end of the resistor R9; the other end of the resistor R9 is respectively connected to the output pin of the AND gate chip U3 and the positive electrode of the diode D2; the collector of the transistor Q2 is respectively connected to one end of the resistor R10 and one end of the resistor R11; the other end of the resistor R10 is connected to the voltage VDD; the other end of the resistor R11 is used to generate a charger access indication signal TP1; the other end of the resistor R11 is connected to the MCU chip; the emitter of the transistor Q2 is connected to the power ground.

[0009] Optionally, when the output pin of the AND gate chip U3 outputs a high level, the charger connection indication signal TP1 is a high level.

[0010] Optionally, the voltage VDD is 3.3V.

[0011] Optionally, the anti-spark circuit also includes: a diode D3 and an MCU chip; the anode of the diode D3 is connected to the MCU chip; the anode of the diode D3 is used to introduce an external power supply control signal TP2; the cathode of the diode D3 is respectively connected to the cathode of the diode D2 and one end of the resistor R5.

[0012] Optionally, the DC connector J1 is also used to connect an external detector device; when the external power supply control signal TP2 is at a high level, the rechargeable battery is connected to the external detector device to start supplying power.

[0013] On the other hand, the present application provides a detector device, which is powered by a rechargeable battery, and the detector device includes the anti-spark circuit.

[0014] Optionally, the rechargeable battery is a lithium battery, a nickel-metal hydride battery, a nickel-cadmium battery, a graphene battery or a sodium battery.

[0015] According to the specific embodiments provided in this application, this application discloses the following technical effects: In the anti-spark circuit provided in the present application, the first pin and the third pin of the DC connector J1 are used for the external charger to be inserted and connected. When the charger is not fully inserted into the DC connector J1, the third pin of the DC connector J1 is connected to the second pin of the DC connector J1. At this time, due to the AND gate logic setting of the AND gate chip U3, there is no conduction between the charger and the rechargeable battery, so no sparks will be generated. Only when the charger is fully inserted into the DC connector J1, so that the third pin of the DC connector J1 is disconnected from the second pin of the DC connector J1, the charger will be connected to the rechargeable battery to start charging, realizing plug-and-play charging without extending the charging waiting time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a circuit connection diagram of the anti-spark circuit in exemplary embodiment 1; Figure 2 is a circuit connection diagram of the anti-spark circuit in exemplary embodiment 2; Figure 3 Schematic diagram of circuit connection of the anti-spark circuit in exemplary embodiment 3. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] The purpose of this application is to propose an anti-sparking circuit and a detector device, which can effectively prevent the generation of charging sparks without prolonging the charging waiting time.

[0020] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] In an exemplary embodiment 1, the present application provides an anti-spark circuit. Figure 1As shown, the anti-spark circuit includes: a DC connector J1, a PMOS tube U1, a PMOS tube U2, an AND gate chip U3, a charging interface J2, resistors R1-R8, a voltage regulator diode D1, a diode D2 and a transistor Q1.

[0022] Among them, the first pin of the DC connector J1 is respectively connected to the drain of the PMOS tube U1 and one end of the resistor R1. The other end of the resistor R1 is respectively connected to one end of the resistor R2, the cathode of the voltage stabilizing diode D1, one end of the resistor R4, the first input pin of the AND chip U3 and the power pin of the AND chip U3. The second pin of the DC connector J1 is connected to the power ground. The third pin of the DC connector J1 is respectively connected to the other end of the resistor R2, one end of the resistor R3 and the second input pin of the AND chip U3. The other end of the resistor R3, the anode of the voltage stabilizing diode D1, the other end of the resistor R4 and the ground pin of the AND chip U3 are all connected to the power ground. The output pin of the AND chip U3 is connected to the anode of the diode D2. The cathode of the diode D2 is connected to one end of the resistor R5. The other end of the resistor R5 is respectively connected to one end of the resistor R6 and the base of the transistor Q1. The other end of the resistor R6 and the emitter of the transistor Q1 are connected to the power ground. The collector of the transistor Q1 is connected to one end of the resistor R7. The other end of the resistor R7 is respectively connected to the gate of the PMOS tube U1, the gate of the PMOS tube U2 and one end of the resistor R8. The other end of the resistor R8 is respectively connected to the source of the PMOS tube U1 and the source of the PMOS tube U2. The drain of the PMOS tube U2 is connected to the first pin of the charging interface J2. The second pin of the charging interface J2 is connected to the power ground; the charging interface J2 is also connected to the rechargeable battery inside the detector device.

[0023] The first pin and the third pin of the DC connector J1 are used for the charger outside the detector to be inserted and connected. When the charger is not inserted or not fully inserted into the DC connector J1, the third pin of the DC connector J1 is connected to the second pin of the DC connector J1. When the charger is fully inserted into the DC connector J1, the third pin of the DC connector J1 is disconnected from the second pin of the DC connector J1.

[0024] In an exemplary embodiment, the DC connector J1 can be a DC022 DC power socket. The DC power socket has three pins, and pins 1, 2, and 3 are used as the first pin, the second pin, and the third pin of the DC connector J1, respectively. Pin 1 of the DC power socket is connected to the drain of the PMOS tube U1, pin 2 is connected to the power ground, and pin 3 is connected to the other end of the resistor R2, one end of the resistor R3, and the second input pin of the AND gate chip U3.

[0025] The resistor R1 is used as a current limiting resistor to protect the voltage regulator diode D1. The voltage regulator diode D1 is used to generate a power supply voltage for the AND gate chip U3 to work. In an exemplary embodiment, the voltage regulator diode D1 can be a ZMM3V3 model, which is powered by a 3.3V voltage.

[0026] The resistor R2 and the resistor R3 together form a voltage divider circuit, which is connected in parallel with the voltage stabilizing diode D1. The resistor R2 is the upper resistor of the voltage divider circuit, and the resistor R3 is the lower resistor of the voltage divider circuit, and the two can divide the voltage to produce a high level.

[0027] The resistor R4 is used to ground the first input pin of the AND gate chip U3 when there is no power supply.

[0028] In an exemplary embodiment, the AND gate chip U3 may adopt a SN74AHC1G08DBVR series chip. Pin 1 of the SN74AHC1G08DBVR series chip serves as the first input pin of the AND gate chip U3, and its input signal is recorded as A. Pin 2 of the SN74AHC1G08DBVR series chip serves as the second input pin of the AND gate chip U3, and its input signal is recorded as B. Pin 3 of the SN74AHC1G08DBVR series chip serves as a ground pin, recorded as GND. Pin 4 of the SN74AHC1G08DBVR series chip serves as an output pin of the AND gate chip U3, and its output signal is recorded as Y. Pin 5 of the AND gate chip U3 serves as a power pin, recorded as VCC, and is used to connect a 3.3V voltage for power supply. The AND gate chip U3 is used to output a high level when it detects that both input signals A and B are at a high level, and drives the subsequent transistor Q1. The AND gate logic used by the AND gate chip U3 is shown in Table 1 below.

[0029] Table 1 AND gate logic of AND gate chip U3

[0030] The resistor R5 is used as a current limiting resistor of the transistor Q1. The transistor Q1 is used to drive the gates of the PMOS transistor U1 and the PMOS transistor U2 to switch.

[0031] The PMOS tube U1 and the PMOS tube U2 are used to turn off or open the charging circuit so that an external charger can be connected to the rechargeable battery for charging. The current in the charging circuit flows from J1→U1→U2→J2.

[0032] In an exemplary embodiment, the PMOS tube U1 and the PMOS tube U2 may adopt the IRF7416 series chip. The IRF7416 series chip includes three electrodes and 8 pins, wherein pins 1, 2, and 3 are source pins S. Pin 4 of the IRF7416 series chip is the gate pin G. Pins 5, 6, 7, and 8 of the IRF7416 series chip are all drain pins D.

[0033] In the anti-sparking circuit of the present application, when the rechargeable battery does not need to be charged, the charger is not inserted into the DC connector J1, and the third pin of the DC connector J1 is connected to the second pin of the DC connector J1, and both are connected to the power ground. When the rechargeable battery needs to be charged, the charger needs to be fully inserted into the DC connector J1. At the moment the charger is inserted, the first pin and the third pin of the DC connector J1 are connected to the charger, and the first input pin of the AND gate chip U3 is at a high level. When the charger is not fully inserted into the DC connector J1, the third pin of the DC connector J1 is not disconnected from the second pin, and the third pin of the DC connector J1 is still connected to the power ground, so the second input pin of the AND gate chip U3 is at a low level. Since the second input pin of the AND gate chip U3 is at a low level, the output pin of the AND gate chip U3 also outputs a low level. At this time, the transistor Q1 is turned off, the PMOS tube U1 and the PMOS tube U2 are not turned on (turned off), the charger and the rechargeable battery are not turned on, and no sparks will be generated.

[0034] When the charger is fully inserted into the DC connector J1 and is in full contact with the first pin and the third pin of the DC connector J1, the third pin of the DC connector J1 is pushed to disconnect from the second pin. At this time, the first input pin and the second input pin of the AND gate chip U3 are both high level, and the output pin of the AND gate chip U3 outputs a high level. At this time, the transistor Q1 is turned on, and then the PMOS tube U1 and the PMOS tube U2 are also turned on. The charger is connected to the rechargeable battery and charging begins. Since the charger is in full contact with the interface of the DC connector J1 at this time, no sparks will be generated. In an exemplary embodiment, the charging voltage of the rechargeable battery is 29.4V.

[0035] In an exemplary embodiment 2, the anti-spark circuit also has a charging indication function. Specifically, Figure 2 As shown, the anti-spark circuit also includes: transistor Q2, resistors R9~R11 and MCU chip ( Figure 2), together forming a charging indication circuit. In the charging indication circuit, the base of the transistor Q2 is connected to one end of the resistor R9. The other end of the resistor R9 is respectively connected to the output pin of the AND gate chip U3 and the positive electrode of the diode D2. The collector of the transistor Q2 is respectively connected to one end of the resistor R10 and one end of the resistor R11. The other end of the resistor R10 is connected to the voltage VDD. The other end of the resistor R11 is used to generate a charger access indication signal TP1. The other end of the resistor R11 is connected to the MCU chip, and is used to transmit the charger access indication signal TP1 to the MCU chip. The emitter of the transistor Q2 is connected to the power ground.

[0036] Among them, the voltage VDD is 3.3V, which is used to power the relevant components in the charging indication circuit. The resistor R9 is used as a current limiting resistor to drive the transistor Q2. The charging indication circuit is used to provide an indication signal TP1 for charger access to the outside. When the output pin of the AND gate chip U3 outputs a high level, the charger access indication signal TP1 is a high level, indicating that the external charger has been connected. The charger access indication signal TP1 is connected to the MCU chip, and can prompt the user through a display screen or an indicator light that it is charging normally at this time.

[0037] In an exemplary embodiment 3, the anti-spark circuit can also be equipped with a power bank function to power or charge external detector equipment. Figure 3 As shown, the anti-spark circuit also includes: a diode D3 and an MCU chip ( Figure 3 (not shown). The anode of the diode D3 is connected to the MCU chip. The anode of the diode D3 is used to introduce the external power supply control signal TP2. The cathode of the diode D3 is respectively connected to the cathode of the diode D2 and one end of the resistor R5. When the anti-spark circuit realizes the power bank function, the DC connector J1 is used to connect the external detector device, that is, the power connector of the external detector device is connected to the DC connector J1 for power supply.

[0038] In an exemplary embodiment, the model of diode D3 and diode D2 can be selected from LL4148. Diode D3 and diode D2 form an OR gate logic relationship to ensure that when the positive input of any diode is at a high level, its negative electrode can output a high level. When it needs to be used as a power bank, the MCU chip sets the external power supply control signal TP2 to a high level. At this time, the transistor Q1 is turned on, the PMOS tube U1 and the PMOS tube U2 are also turned on, and the rechargeable battery is connected to the external detector device, and the rechargeable battery starts to supply power as a power supply. At this time, the current flow in the power supply circuit is J2→U2→U1→J1. The anti-spark circuit can realize the function of a power bank, which solves the dilemma of needing to charge other detector devices when they are out of power during outdoor measurement.

[0039] In an exemplary embodiment, the present application also provides a detector device, which is powered by a rechargeable battery and is provided with Figure 1 , Figure 2 or Figure 3 The anti-spark circuit shown. The rechargeable battery may be a lithium battery, a nickel-metal hydride battery, a nickel-cadmium battery, a graphene battery or a sodium battery. The detector device may be a portable gas detector device, which is powered by a 24V lithium battery. In other exemplary embodiments, the detector device may also be a portable liquid detector or other device.

[0040] Compared with the existing delay circuit solution, the anti-spark circuit of this application realizes fast response charging, plug and play charging, and no delay waiting. At the same time, the charging detection of the anti-spark circuit of this application relies on the good contact of the DC connector J1, which can effectively prevent the generation of charging sparks during the insertion of the charger. If the contact is not complete, charging cannot be performed, ensuring that accidents such as fire will not occur due to poor charging contact. In addition, by adding a diode D3 connected to the MCU chip and connecting the DC connector J1 to an external detector device, the power bank function of external charging can be realized.

[0041] It should be noted that the terms "include", "comprising" or any other variations thereof used in this application are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of further restrictions, the elements defined by the sentence "comprising..." do not exclude the existence of other identical elements in the product or system including the elements.

[0042] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the present application through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

[0043] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A spark prevention circuit, characterized in that: include: DC connector J1, PMOS tube U1, PMOS tube U2, AND gate chip U3, charging interface J2, resistors R1~R8, voltage regulator diode D1, diode D2 and transistor Q1; The first pin of the DC connector J1 is respectively connected to the drain of the PMOS tube U1 and one end of the resistor R1; the other end of the resistor R1 is respectively connected to one end of the resistor R2, the cathode of the voltage stabilizing diode D1, one end of the resistor R4, the first input pin of the AND gate chip U3 and the power pin of the AND gate chip U3; the second pin of the DC connector J1 is connected to the power ground; the third pin of the DC connector J1 is respectively connected to the other end of the resistor R2, one end of the resistor R3 and the second input pin of the AND gate chip U3; the other end of the resistor R3, the anode of the voltage stabilizing diode D1, the other end of the resistor R4 and the ground pin of the AND gate chip U3 are all connected to the power ground; the output pin of the AND gate chip U3 is connected to the anode of the diode D2 ; The cathode of the diode D2 is connected to one end of the resistor R5; the other end of the resistor R5 is respectively connected to one end of the resistor R6 and the base of the transistor Q1; the other end of the resistor R6 and the emitter of the transistor Q1 are connected to the power ground; the collector of the transistor Q1 is connected to one end of the resistor R7; the other end of the resistor R7 is respectively connected to the gate of the PMOS tube U1, the gate of the PMOS tube U2 and one end of the resistor R8; the other end of the resistor R8 is respectively connected to the source of the PMOS tube U1 and the source of the PMOS tube U2; the drain of the PMOS tube U2 is connected to the first pin of the charging interface J2; the second pin of the charging interface J2 is connected to the power ground; the charging interface J2 is also connected to the rechargeable battery inside the detector; The first pin and the third pin of the DC connector J1 are used for connection with a charger outside the detector device; when the charger is not inserted or not fully inserted into the DC connector J1, the third pin of the DC connector J1 is connected to the second pin of the DC connector J1; when the charger is fully inserted into the DC connector J1, the third pin of the DC connector J1 is disconnected from the second pin of the DC connector J1.

2. The anti-spark circuit according to claim 1, characterized in that: When the charger is not fully inserted into the DC connector J1, the third pin of the DC connector J1 is connected to the second pin of the DC connector J1, the first input pin of the AND gate chip U3 is at a high level, the second input pin of the AND gate chip U3 is at a low level, the output pin of the AND gate chip U3 outputs a low level, the transistor Q1 is turned off, the PMOS tube U1 and the PMOS tube U2 are not conducting, and the charger is not conducting with the rechargeable battery.

3. The anti-spark circuit according to claim 1, characterized in that: When the charger is fully inserted into the DC connector J1, the third pin of the DC connector J1 is disconnected from the second pin of the DC connector J1, the first input pin of the AND gate chip U3 and the second input pin of the AND gate chip U3 are both high level, the output pin of the AND gate chip U3 outputs a high level, the transistor Q1 is turned on, the PMOS tube U1 and the PMOS tube U2 are also turned on, and the charger is connected to the rechargeable battery to start charging.

4. The anti-spark circuit according to claim 3, characterized in that: Also includes: Transistor Q2, resistors R9~R11 and MCU chip; the base of the transistor Q2 is connected to one end of the resistor R9; the other end of the resistor R9 is respectively connected to the output pin of the AND gate chip U3 and the positive electrode of the diode D2; the collector of the transistor Q2 is respectively connected to one end of the resistor R10 and one end of the resistor R11; the other end of the resistor R10 is connected to the voltage VDD; the other end of the resistor R11 is used to generate a charger access indication signal TP1; the other end of the resistor R11 is connected to the MCU chip; the emitter of the transistor Q2 is connected to the power ground.

5. The anti-spark circuit according to claim 4, characterized in that: When the output pin of the AND gate chip U3 outputs a high level, the charger connection indication signal TP1 is a high level.

6. The anti-spark circuit according to claim 4, characterized in that: The voltage VDD is 3.3V.

7. The anti-spark circuit according to claim 1, characterized in that: Also includes: A diode D3 and an MCU chip; the anode of the diode D3 is connected to the MCU chip; The anode of the diode D3 is used to introduce the external power supply control signal TP2; the cathode of the diode D3 is connected to the cathode of the diode D2 and one end of the resistor R5 respectively.

8. The anti-spark circuit according to claim 7, characterized in that: The DC connector J1 is also used to connect to an external detector device; when the external power supply control signal TP2 is at a high level, the rechargeable battery is connected to the external detector device to start supplying power.

9. A detector device, powered by a rechargeable battery, characterized in that: The invention comprises the anti-spark circuit according to any one of claims 1 to 8.

10. The detector device according to claim 9, characterized in that: The rechargeable battery is a lithium battery, a nickel-metal hydride battery, a nickel-cadmium battery, a graphene battery or a sodium battery.

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