Reverse connection prevention circuit and explosion-proof electronic equipment

By introducing a reverse connection protection circuit into the charging device, and using a switching transistor and protection module to prevent reverse connection of positive and negative terminals, the short circuit risk of rugged mobile phones or tablets during charging is solved, and safe and reliable charging of the device is achieved.

CN223638997UActive Publication Date: 2025-12-05SHENZHEN LEMU COMM CO LTD
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Patent Information

Application Number
CN202422691259.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-04
Publication Date
2025-12-05
Estimated Expiration
2034-11-04

AI Technical Summary

Technical Problem

In existing technologies, rugged phones or tablets are prone to short circuits and damage when charging due to reverse polarity, and unreasonable charging port design can easily cause safety hazards.

Method used

Design a reverse connection protection circuit, including a power input module, a reverse connection protection module, a surge protection module, and an overvoltage protection module. Through components such as switching transistors, transient voltage suppression diodes, and overvoltage protection chips, ensure that the power supply circuit is disconnected when the positive and negative terminals are not reversed, and prevent surges and overvoltages from damaging the equipment.

Benefits of technology

It effectively prevents equipment damage caused by reverse polarity connection, improves charging safety, and ensures voltage stability and safety during equipment use.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an anti-reverse connection circuit and explosion-proof electronic equipment, and relates to the technical field of charging of mobile equipment. The circuit comprises a power supply input module, an anti-reverse connection module, a surge protection module, an overvoltage protection module and a power supply output module. The power supply input module comprises an input positive terminal and an input negative terminal to obtain an input power supply; the anti-reverse connection module is used for disconnecting a power supply circuit of the input power supply when the input power supply is reversely connected with the input positive electrode end and the input negative electrode end; the surge protection module is connected to the input negative electrode end and is used for preventing surge voltage when the input power supply is normally connected with the input positive electrode end and the input negative electrode end; the overvoltage protection module is used for preventing the input voltage of the input power supply from exceeding a set threshold value when the input power supply is normally connected with the input positive electrode end and the input negative electrode end; the power output module comprises an output positive terminal and an output negative terminal, the output positive terminal is connected to the overvoltage protection module, and the output negative terminal is connected to the input negative terminal and used for outputting input power.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the charging technical field of mobile device, concretely relates to a prevent reverse connection circuit and explosion -proof electronic equipment. BACKGROUND

[0002] In the use habit and use environment factor of the three-proof mobile phone or three-proof panel, the mobile phone or panel is needed to be charged with the seat charging side or flatly. The common host end charging mode in the market is to reserve pin point to charge, and the charging end is charged to the mobile phone or panel through the thimble or the spring piece (the mobile phone end is mainly exposed contact point).

[0003] The seat charge on the market is generally through the seat charge frame shell, plus the size buckle shell material for different types of host to put the mobile phone into the seat charge to hold the mobile phone. But if the mobile phone buckle falls off or the buckle is not suitable, it will cause the mobile phone to be inserted into the seat charge reversely, causing the risk of positive and negative short circuit and burning the mobile phone and adapter.

[0004] In the exposed charging contact point of the mobile phone end, if the positive and negative poles are not installed reasonably, and the positive and negative poles are connected reversely during charging, the risk of burning the mobile phone will be caused. UTILITY MODEL CONTENTS

[0005] The utility model mainly solves the technical problem: a prevent reverse connection circuit and explosion -proof electronic equipment with high safety factor.

[0006] According to the first aspect, a prevent reverse connection circuit is provided in an embodiment, including:

[0007] The power input module includes the input positive end and the input negative end; the power input module obtains the input power supply through the input positive end and the input negative end;

[0008] The prevent reverse connection module is connected to the power input module, and the prevent reverse connection module is used for disconnecting the power supply circuit of the input power supply when the input power supply and the input positive end and the input negative end are reversely connected;

[0009] The surge protection module is connected to the input negative end, and the surge protection module is used for preventing the surge voltage of the input power supply when the input power supply and the input positive end and the input negative end are normally connected;

[0010] The overvoltage protection module is connected to the surge protection module, and the overvoltage protection module is used for preventing the input voltage of the input power supply from exceeding the set threshold when the input power supply and the input positive end and the input negative end are normally connected;

[0011] The power output module comprises an output positive terminal and an output negative terminal, the output positive terminal is connected to the overvoltage protection module, and the output negative terminal is connected to the input negative terminal; the power output module is used for outputting the input power supply.

[0012] In an embodiment, the reverse connection prevention module comprises a switch tube module, which is used for disconnecting the power supply circuit of the input power supply when the input power supply is reversely connected to the input positive terminal and the input negative terminal.

[0013] In an embodiment, the switch tube module comprises a switch tube Q1, a switch tube Q2, a resistor R1 and a resistor R2.

[0014] The first end of the switch tube Q1 is connected to the input negative terminal, the second end of the switch tube Q1 is connected to the first end of the switch tube Q2, and the second end of the switch tube Q2 is grounded; the first end of the resistor R1 is connected to the input positive terminal, the second end of the resistor R1 is connected to the first end of the resistor R2, and the second end of the resistor R2 is grounded; the control end of the switch tube Q3 is connected to the second end of the resistor R1, and the control end of the switch tube Q2 is connected to the second end of the resistor R1.

[0015] In an embodiment, the surge protection module comprises a transient voltage suppression diode D1, a transient voltage suppression diode D2, a voltage stabilizing diode D3, a switch tube Q3 and a resistor R3.

[0016] The output end of the transient voltage suppression diode D1 is connected to the input positive terminal, the input end of the transient voltage suppression diode D1 is connected to the input end of the transient voltage suppression diode D2, and the output end of the transient voltage suppression diode D2 is grounded; the output end of the voltage stabilizing diode D3 is connected to the input positive terminal, the input end of the voltage stabilizing diode D3 is connected to the first end of the resistor R3, and the second end of the resistor R3 is grounded; the second end of the switch tube Q3 is the output end of the surge protection module, the second end of the switch tube Q3 is connected to the input positive terminal, the first end of the switch tube Q3 is grounded, and the control end of the switch tube Q3 is connected to the input end of the voltage stabilizing diode D3.

[0017] In an embodiment, the overvoltage protection module comprises an AW32805CSR chip, a resistor R4, a resistor R5, a capacitor C1 and a capacitor C2.

[0018] The first end of the capacitor C2 is connected to the surge protection module, and the second end of the capacitor C2 is grounded; the first end of the resistor R4 is connected to the input positive terminal, the second end of the resistor R4 is connected to the first end of the resistor R5, and the second end of the resistor R5 is grounded; the AW32805CSR chip includes a switch input port, a switch output port, and a threshold adjustment port; the switch input port is connected to the input positive terminal, the threshold adjustment port is connected to the second end of the resistor R4, and the switch output port is connected to the power output module; the first end of the capacitor C1 is connected to the switch output port, and the second end of the capacitor C1 is grounded.

[0019] According to a second aspect, an embodiment provides an anti-explosion electronic device, comprising an anti-reverse connection circuit, the anti-reverse connection circuit comprising:

[0020] a power input module comprising an input positive terminal and an input negative terminal; the power input module obtains an input power supply through the input positive terminal and the input negative terminal;

[0021] an anti-reverse connection module connected to the power input module, the anti-reverse connection module being configured to disconnect the power supply circuit of the input power supply when the input power supply is reversely connected to the input positive terminal and the input negative terminal;

[0022] a surge protection module connected to the input negative terminal, the protection module being configured to prevent a surge voltage of the input power supply when the input power supply is normally connected to the input positive terminal and the input negative terminal;

[0023] an overvoltage protection module connected to the surge protection module, the overvoltage protection module being configured to prevent the input voltage of the input power supply from exceeding a set threshold when the input power supply is normally connected to the input positive terminal and the input negative terminal;

[0024] a power output module comprising an output positive terminal and an output negative terminal, the output positive terminal being connected to the overvoltage protection module, and the output negative terminal being connected to the input negative terminal; the power output module is configured to output the input power supply.

[0025] In an embodiment, the anti-reverse connection module comprises a switch tube module, and the switch tube module is configured to disconnect the power supply circuit of the input power supply when the input power supply is reversely connected to the input positive terminal and the input negative terminal.

[0026] In an embodiment, the switch tube module comprises a switch tube Q1, a switch tube Q2, a resistor R1, and a resistor R2.

[0027] The first end of the switch tube Q1 is connected to the input negative end, the second end of the switch tube Q1 is connected to the first end of the switch tube Q2, and the second end of the switch tube Q2 is grounded; the first end of the resistor R1 is connected to the input positive end, the second end of the resistor R1 is connected to the first end of the resistor R2, and the second end of the resistor R2 is grounded; the control end of the switch tube Q3 is connected to the second end of the resistor R1, and the control end of the switch tube Q2 is connected to the second end of the resistor R1.

[0028] In an embodiment, the surge protection module comprises a transient voltage suppression diode D1, a transient voltage suppression diode D2, a voltage stabilizing diode D3, a switch tube Q3 and a resistor R3.

[0029] The output end of the transient voltage suppression diode D1 is connected to the input positive end, the input end of the transient voltage suppression diode D1 is connected to the input end of the transient voltage suppression diode D2, and the output end of the transient voltage suppression diode D2 is grounded; the output end of the voltage stabilizing diode D3 is connected to the input positive end, the input end of the voltage stabilizing diode D3 is connected to the first end of the resistor R3, and the second end of the resistor R3 is grounded; the second end of the switch tube Q3 is the output end of the surge protection module, the second end of the switch tube Q3 is connected to the input positive end, the first end of the switch tube Q3 is grounded, and the control end of the switch tube Q3 is connected to the input end of the voltage stabilizing diode D3.

[0030] In an embodiment, the overvoltage protection module comprises an AW32805CSR chip, a resistor R4, a resistor R5, a capacitor C1 and a capacitor C2.

[0031] The first end of the capacitor C2 is connected to the surge protection module, and the second end of the capacitor C2 is grounded; the first end of the resistor R4 is connected to the input positive end, the second end of the resistor R4 is connected to the first end of the resistor R5, and the second end of the resistor R5 is grounded; the AW32805CSR chip comprises a switch input port, a switch output port and a threshold adjustment port; the switch input port is connected to the input positive end, the threshold adjustment port is connected to the second end of the resistor R4, and the switch output port is connected to the power output module; the first end of the capacitor C1 is connected to the switch output port, and the second end of the capacitor C1 is grounded.

[0032] According to the anti-reverse connection circuit and the explosion-proof electronic device, the anti-reverse connection circuit comprises a power input module, an anti-reverse connection module, a surge protection module, an overvoltage protection module and a power output module. The anti-reverse connection module is used to prevent the input power and the power input module from being reversely connected, so as to prevent the circuit and the hardware device from being burnt out when being reversely connected. The surge protection module and the overvoltage protection module are used to ensure the safety of the anti-reverse connection circuit during use, and ensure the charging safety of the explosion-proof electronic device. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 FIG. 1 is a structural schematic diagram of an anti-reverse connection circuit according to an embodiment;

[0034] Figure 2 FIG. 2 is a circuit schematic diagram of the anti-reverse connection circuit according to the embodiment;

[0035] Figure 3 FIG. 3 is a module schematic diagram of the anti-reverse connection module in the anti-reverse connection circuit according to the embodiment;

[0036] Figure 4 FIG. 4 is a result schematic diagram of an explosion-proof electronic device according to another embodiment. DETAILED DESCRIPTION

[0037] The utility model will be further described in detail through specific implementation manners and the drawings. In different implementation manners, similar elements are marked with similar element numbers. In the following implementation manners, many details are described in order to make the present application be better understood. However, the person skilled in the art can easily realize that part of the features can be omitted in different cases, or can be replaced by other elements, materials or methods. In some cases, some operations related to the present application are not shown or described in the specification in order to avoid the core part of the present application being overwhelmed by too much description, and the person skilled in the art does not need to describe these related operations in detail according to the description in the specification and the general technical knowledge in the art.

[0038] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementation manners. Meanwhile, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that is obvious to the person skilled in the art. Therefore, the order in the specification and the drawings is only for the purpose of clearly describing a certain embodiment, and does not mean that it is the necessary order, unless otherwise stated that a certain order must be followed.

[0039] The serial numbers of components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0040] Please refer to Figure 1 In an embodiment, a reverse connection prevention circuit 100 is provided, which includes a power input module 110, a reverse connection prevention module 120, a surge protection module 130, an overvoltage protection module 140, and a power output module 150.

[0041] Please refer to Figure 2 In an embodiment, the power input module 110 includes an input positive terminal 111 and an input negative terminal 112, which are used to connect the input power supply to obtain the input power supply through the input positive terminal 111 and the input negative terminal 112.

[0042] In an embodiment, the reverse connection prevention module 120 is connected to the power input module 111, and when the input power supply is reversed with the input positive terminal 111 and the input negative terminal 112, the reverse connection prevention module 120 is disconnected, thereby disconnecting the power supply circuit of the input power supply.

[0043] Please refer to Figure 3 In an embodiment, the reverse connection prevention module 120 includes a switch tube module 121, which uses the on-off of the switch tube module 121 to disconnect the power supply circuit of the input power supply when the input power supply is reversed with the input positive terminal 111 and the input negative terminal 112.

[0044] Please refer to Figure 2 In an embodiment, the switch tube module 121 includes a switch tube Q1, a switch tube Q2, a resistor R1, and a resistor R2. The first end of the switch tube Q1 is connected to the input negative terminal 112, the second end of the switch tube Q1 is connected to the first end of the switch tube Q2, and the second end of the switch tube Q2 is grounded. The first end of the resistor R1 is connected to the input positive terminal 111, the second end of the resistor R1 is connected to the first end of the resistor R2, and the second end of the resistor R2 is grounded. The control end of the switch tube Q3 is connected to the second end of the resistor R1, and the control end of the switch tube Q2 is connected to the second end of the resistor R1.

[0045] It should be noted that the reverse connection prevention circuit 110 is normally connected to the positive and negative terminals of the input power supply when it is working normally. The switch tube Q1 and the switch tube Q2 form a bidirectional N-type MOS tube connected to the input negative terminal 112, thereby preventing the problem of overloading and burning out the circuit caused by connecting the input negative terminal 112 to the positive voltage of the input voltage.

[0046] When the input power supply is normally connected to the input positive terminal 111 and the input negative terminal 112, the resistor R1 and the resistor R2 obtain voltages, so that the voltages of the gate and the source of the switch tube Q1 and the switch tube Q2 satisfy V GS At this time, the switch tube Q1 and the switch tube Q2 are turned on, and the reverse connection protection circuit 100 normally works.

[0047] When the input power supply is reversely connected to the input positive terminal 111 and the input negative terminal 112, that is, the positive pole of the input power supply is connected to the input negative terminal 112, and the negative pole of the input power supply is connected to the input positive terminal 111, the resistor R1 and the resistor R2 have no voltage, at this time, the source of the switch tube Q1 is high level, and the gate of the switch tube Q1 is low level, so that the V GS of the switch tube Q1 cannot be satisfied, and the switch tube Q1 is turned off. Similarly, the source of the switch tube Q2 is high level, and the gate of the switch tube Q2 is low level, so that the V GS of the switch tube Q2 cannot be satisfied, and the switch tube Q2 is turned off. At this time, the input negative terminal 112 of the power supply input module 110 cannot be connected to the output negative terminal in the power supply output module 150. Since there is no loop between the power supply input module 110 and the power supply output module 150, when the input power supply is reversely connected to the input positive terminal 111 and the input negative terminal 112, the power supply circuit of the input power supply is in an open state, so that the circuit will not be burned out.

[0048] In an embodiment, the surge protection module 130 is connected to the power supply input module 110, and the surge protection module 110 is used to prevent the surge voltage of the input power supply when the input power supply is normally connected to the input positive terminal 111 and the input negative terminal 112.

[0049] Please refer to Figure 2 In an embodiment, the surge protection module 130 includes a transient voltage suppression diode D1, a transient voltage suppression diode D2, a voltage stabilizing diode D3, a switch tube Q3 and a resistor R3. The output terminal of the transient voltage suppression diode D1 is connected to the input positive terminal 111, the input terminal of the transient voltage suppression diode D1 is connected to the input terminal of the transient voltage suppression diode D2, and the output terminal of the transient voltage suppression diode D2 is grounded. The output terminal of the voltage stabilizing diode D3 is connected to the input positive terminal 111, the input terminal of the voltage stabilizing diode D3 is connected to the first terminal of the resistor R3, and the second terminal of the resistor R3 is grounded. The second terminal of the switch tube Q3 is the output terminal of the surge protection module 130, the second terminal of the switch tube Q3 is connected to the input positive terminal 111, the first terminal of the switch tube Q3 is grounded, and the control terminal of the switch tube Q3 is connected to the input terminal of the voltage stabilizing diode D3.

[0050] It should be noted that when the input voltage of the input power supply is unstable, or the grid voltage input by the input power supply is unstable, a transient 10kv or higher surge voltage will be generated, and the surge voltage will be input to the equipment connected to the reverse connection protection circuit 100. When the surge voltage exceeds the voltage limit of the hardware, the reverse connection protection circuit 100 and the equipment will be damaged. The transient voltage suppression diode D1 and the transient voltage suppression diode D2 can quickly respond to the surge voltage released in an instant, and because the transient voltage suppression diode D1 and the transient voltage suppression diode D2 are bidirectional, they not only have a release path for the input positive terminal 111, but also have a release protection effect for the surge of the input negative terminal 112. The surge release circuit composed of the zener diode D3, the switch tube Q3 and the resistor R3 can more effectively release the front-end surge release overload caused by excessive and long-time surge voltage.

[0051] When the input voltage input at the input positive terminal 111 exceeds the working voltage of the zener diode D3, a voltage division will be generated at the resistor R3. When the voltage division voltage exceeds the voltage of the gate and source of the switch tube Q3, the switch tube Q3 is turned on, so as to more quickly release the surge voltage. When the surge voltage is released, the zener diode D3 does not work, the voltage of the gate and source of the switch tube Q3 does not meet the conduction condition, and the switch tube Q3 is cut off, thereby playing a role in protecting the rear-end circuit and the rear-end hardware.

[0052] In an embodiment, the overvoltage protection module 140 is connected to the surge protection module 130, and the overvoltage protection module 140 is used to prevent the input voltage of the input power supply from exceeding the set threshold when the input power supply is normally connected to the input positive terminal 111 and the input negative terminal 112.

[0053] Please refer to Figure 2 In an embodiment, the overvoltage protection module 140 includes an AW32805CSR chip, a resistor R4, a resistor R5, a capacitor C1 and a capacitor C2. The first end of the capacitor C2 is connected to the surge protection module 130, that is, the second end of the switch tube Q3, and the second end of the capacitor C2 is grounded. The first end of the resistor R4 is connected to the input positive terminal 111, the second end of the resistor R4 is connected to the first end of the resistor R5, and the second end of the resistor R5 is grounded. The AW32805CSR chip includes a switch input port IN, a switch output port OUT and a threshold adjustment port OVLO, the switch input port IN is connected to the input positive terminal 111, the threshold adjustment port OVLO is connected to the second end of the resistor R4, and the switch output port OUT is connected to the power supply output module 150. The first end of the capacitor C1 is connected to the switch output port OUT, and the second end of the capacitor C1 is grounded. The enable end EN and the ground end GND in the AW32805CSR chip are both grounded.

[0054] It should be noted that, in order to prevent the input voltage input by the input power from exceeding the set threshold value and damaging the rear-end circuit, an overvoltage protection module 140 is additionally added in the reverse connection prevention circuit 100, and an OVP device, i.e., an AW32805CSR chip, is arranged in the overvoltage protection module 140. In the AW32805CSR chip, the threshold value voltage is input to the threshold value adjusting port OVLO, and when the input voltage exceeds the threshold value voltage, the AW32805CSR chip will disconnect the switch input port IN and the switch output port OUT.

[0055] In an embodiment, the power output module 150 includes an output positive terminal 151 and an output negative terminal 152, the output positive terminal 151 is connected to the overvoltage protection module 140, i.e., the output positive terminal 151 is connected to the first end of the capacitor C1, and the output negative terminal 152 is connected to the input negative terminal 112, and the power output module 150 is used to output the input power.

[0056] Please refer to Figure 4 In another embodiment, an explosion-proof electronic device 10 is provided, which includes a reverse connection prevention circuit 100, and the reverse connection prevention circuit 100 includes a power input module 110, a reverse connection prevention module 120, a surge protection module 130, an overvoltage protection module 140, and a power output module 150.

[0057] In an embodiment, the power input module 110 includes an input positive terminal 111 and an input negative terminal 112, and the input positive terminal 111 and the input negative terminal 112 are used to connect the input power to obtain the input power through the input positive terminal 111 and the input negative terminal 112. Wherein, the input positive terminal 111 and the input negative terminal 112 are arranged in the explosion-proof electronic device 10 in the form of a thimble or a spring sheet.

[0058] In an embodiment, the reverse connection prevention module 120 is connected to the power input module 111, and when the input power is reversely connected to the input positive terminal 111 and the input negative terminal 112, the reverse connection prevention module 120 is disconnected, thereby disconnecting the power supply circuit of the input power for supplying power to the battery of the explosion-proof electronic device 10.

[0059] In one embodiment, the reverse connection prevention module 120 includes a switch tube module 121, which is configured to disconnect the power supply circuit of the input power supply when the input power supply is reversely connected to the input positive terminal 111 and the input negative terminal 112 by switching on and off the switch tube module 121. The switch tube module 121 includes a switch tube Q1, a switch tube Q2, a resistor R1 and a resistor R2. The first end of the switch tube Q1 is connected to the input negative terminal 112, the second end of the switch tube Q1 is connected to the first end of the switch tube Q2, and the second end of the switch tube Q2 is grounded. The first end of the resistor R1 is connected to the input positive terminal 111, the second end of the resistor R1 is connected to the first end of the resistor R2, and the second end of the resistor R2 is grounded. The control end of the switch tube Q3 is connected to the second end of the resistor R1, and the control end of the switch tube Q2 is connected to the second end of the resistor R1.

[0060] In one embodiment, the surge protection module 130 is connected to the power input module 110, and is configured to prevent the surge voltage of the input power supply when the input power supply is normally connected to the input positive terminal 111 and the input negative terminal 112. The surge protection module 130 includes a transient voltage suppression diode D1, a transient voltage suppression diode D2, a zener diode D3, a switch tube Q3 and a resistor R3. The output end of the transient voltage suppression diode D1 is connected to the input positive terminal 111, the input end of the transient voltage suppression diode D1 is connected to the input end of the transient voltage suppression diode D2, and the output end of the transient voltage suppression diode D2 is grounded. The output end of the zener diode D3 is connected to the input positive terminal 111, the input end of the zener diode D3 is connected to the first end of the resistor R3, and the second end of the resistor R3 is grounded. The second end of the switch tube Q3 is the output end of the surge protection module 130, the second end of the switch tube Q3 is connected to the input positive terminal 111, the first end of the switch tube Q3 is grounded, and the control end of the switch tube Q3 is connected to the input end of the zener diode D3.

[0061] In an embodiment, the overvoltage protection module 140 is connected to the surge protection module 130, and the overvoltage protection module 140 is used to prevent the input voltage of the input power supply from exceeding a set threshold when the input power supply is normally connected to the input positive terminal 111 and the input negative terminal 112. The overvoltage protection module 140 includes an AW32805CSR chip, a resistor R4, a resistor R5, a capacitor C1, and a capacitor C2. The first end of the capacitor C2 is connected to the surge protection module 130, that is, the second end of the switch tube Q3, and the second end of the capacitor C2 is grounded. The first end of the resistor R4 is connected to the input positive terminal 111, the second end of the resistor R4 is connected to the first end of the resistor R5, and the second end of the resistor R5 is grounded. The AW32805CSR chip includes a switch input port IN, a switch output port OUT, and a threshold adjustment port OVLO, the switch input port IN is connected to the input positive terminal 111, the threshold adjustment port OVLO is connected to the second end of the resistor R4, and the switch output port OUT is connected to the power supply output module 150. The first end of the capacitor C1 is connected to the switch output port OUT, and the second end of the capacitor C1 is grounded.

[0062] In an embodiment, the power supply output module 150 includes an output positive terminal 151 and an output negative terminal 152, the output positive terminal 151 is connected to the overvoltage protection module 140, that is, the output positive terminal 151 is connected to the first end of the capacitor C1, the output negative terminal 152 is connected to the input negative terminal 112, and the power supply output module 150 is used to output the input power supply to supply power to the battery of the explosion-proof electronic device 10.

[0063] The explosion-proof electronic device 10 provided by the application can prevent the risk of short circuit and burnout of the explosion-proof electronic device 10 caused by accidental reverse connection of the explosion-proof electronic device 10 to the seat charger when the explosion-proof electronic device 10 is charged by the seat charger. In addition, the damage of the explosion-proof electronic device 10 caused by reverse connection can be prevented, and the safety event caused by exceeding the load of the explosion-proof electronic device 10 can also be prevented. The application uses the surge protection module 130 and the overvoltage protection module 140 to ensure the safety of the input voltage of the explosion-proof electronic device 10 during use, and also ensures the charging safety of the explosion-proof electronic device 10.

[0064] The above application of specific examples is used to illustrate the application, which is only used to help understand the application and does not limit the application. For those skilled in the art to which the application belongs, according to the idea of the application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. An anti-reverse connection circuit, characterized by, The application relates to a power supply input module, a reverse connection prevention module, a surge protection module, a power supply output module and a power supply output module. The power supply input module comprises an input positive terminal and an input negative terminal. The power supply input module obtains an input power supply through the input positive terminal and the input negative terminal. The reverse connection prevention module is connected to the power supply input module, and the reverse connection prevention module is used for disconnecting the power supply circuit of the input power supply when the input power supply is reversely connected to the input positive terminal and the input negative terminal. The surge protection module is connected to the input negative terminal, and the surge protection module is used for preventing the surge voltage of the input power supply when the input power supply is normally connected to the input positive terminal and the input negative terminal. The overvoltage protection module is connected to the surge protection module, and the overvoltage protection module is used for preventing the input voltage of the input power supply from exceeding a set threshold when the input power supply is normally connected to the input positive terminal and the input negative terminal. The power supply output module comprises an output positive terminal and an output negative terminal, the output positive terminal is connected to the overvoltage protection module, the output negative terminal is connected to the input negative terminal, and the power supply output module is used for outputting the input power supply.

2. The reverse connection prevention circuit according to claim 1, wherein The reverse connection prevention module comprises a switch tube module, and the switch tube module is used for disconnecting the power supply circuit of the input power supply when the input power supply is reversely connected to the input positive terminal and the input negative terminal.

3. The reverse connection prevention circuit of claim 2, wherein, The switch tube module comprises a switch tube Q1, a switch tube Q2, a resistor R1 and a resistor R2. The first end of the switch tube Q1 is connected to the input negative terminal, the second end of the switch tube Q1 is connected to the first end of the switch tube Q2, the second end of the switch tube Q2 is grounded, the first end of the resistor R1 is connected to the input positive terminal, the second end of the resistor R1 is connected to the first end of the resistor R2, the second end of the resistor R2 is grounded, the control end of the switch tube Q3 is connected to the second end of the resistor R1, and the control end of the switch tube Q2 is connected to the second end of the resistor R1.

4. The reverse connection prevention circuit of claim 3, wherein The surge protection module comprises a transient voltage suppression diode D1, a transient voltage suppression diode D2, a voltage stabilizing diode D3, a switch tube Q3 and a resistor R3. The output end of the transient voltage suppression diode D1 is connected to the input positive terminal, the input end of the transient voltage suppression diode D1 is connected to the input end of the transient voltage suppression diode D2, the output end of the transient voltage suppression diode D2 is grounded, the output end of the voltage stabilizing diode D3 is connected to the input positive terminal, the input end of the voltage stabilizing diode D3 is connected to the first end of the resistor R3, the second end of the resistor R3 is grounded, the second end of the switch tube Q3 is the output end of the surge protection module, the second end of the switch tube Q3 is connected to the input positive terminal, the first end of the switch tube Q3 is grounded, and the control end of the switch tube Q3 is connected to the input end of the voltage stabilizing diode D3.

5. The reverse connection prevention circuit of claim 4, wherein, The overvoltage protection module comprises an AW32805CSR chip, a resistor R4, a resistor R5, a capacitor C1 and a capacitor C2. The first end of the capacitor C2 is connected to the surge protection module, and the second end of the capacitor C2 is grounded; the first end of the resistor R4 is connected to the input positive terminal, the second end of the resistor R4 is connected to the first end of the resistor R5, and the second end of the resistor R5 is grounded; the AW32805CSR chip includes a switch input port, a switch output port and a threshold adjustment port; the switch input port is connected to the input positive terminal, the threshold adjustment port is connected to the second end of the resistor R4, and the switch output port is connected to the power output module; the first end of the capacitor C1 is connected to the switch output port, and the second end of the capacitor C1 is grounded.

6. An explosion-proof electronic device characterized by comprising: The anti-reverse connection circuit comprises: The power input module comprises an input positive terminal and an input negative terminal; the power input module obtains an input power supply through the input positive terminal and the input negative terminal; The anti-reverse connection module is connected to the power input module, and is used for disconnecting the power supply circuit of the input power supply when the input power supply and the input positive terminal and the input negative terminal are reversely connected; The surge protection module is connected to the input negative terminal, and is used for preventing the surge voltage of the input power supply when the input power supply and the input positive terminal and the input negative terminal are normally connected; The overvoltage protection module is connected to the surge protection module, and is used for preventing the input voltage of the input power supply from exceeding a set threshold when the input power supply and the input positive terminal and the input negative terminal are normally connected; The power output module comprises an output positive terminal and an output negative terminal, the output positive terminal is connected to the overvoltage protection module, and the output negative terminal is connected to the input negative terminal; the power output module is used for outputting the input power supply.

7. The explosion-proof electronic device of claim 6, wherein, The anti-reverse connection module comprises a switch tube module, and the switch tube module is used for disconnecting the power supply circuit of the input power supply when the input power supply and the input positive terminal and the input negative terminal are reversely connected.

8. The explosion-proof electronic device of claim 7, wherein, The switch tube module comprises a switch tube Q1, a switch tube Q2, a resistor R1 and a resistor R2; The first end of the switch tube Q1 is connected to the input negative terminal, the second end of the switch tube Q1 is connected to the first end of the switch tube Q2, and the second end of the switch tube Q2 is grounded; the first end of the resistor R1 is connected to the input positive terminal, the second end of the resistor R1 is connected to the first end of the resistor R2, and the second end of the resistor R2 is grounded; the control end of the switch tube Q3 is connected to the second end of the resistor R1, and the control end of the switch tube Q2 is connected to the second end of the resistor R1.

9. The explosion-proof electronic device of claim 8, wherein the housing is made of a material that is resistant to penetration by a projectile. The surge protection module comprises a transient voltage suppression diode D1, a transient voltage suppression diode D2, a voltage stabilizing diode D3, a switch tube Q3 and a resistor R3; The output end of the transient voltage suppression diode D1 is connected with the input positive end, the input end of the transient voltage suppression diode D1 is connected with the input end of the transient voltage suppression diode D2, and the output end of the transient voltage suppression diode D2 is grounded; the output end of the voltage stabilizing diode D3 is connected with the input positive end, the input end of the voltage stabilizing diode D3 is connected with the first end of the resistor R3, and the second end of the resistor R3 is grounded; the second end of the switch tube Q3 is the output end of the surge protection module, the second end of the switch tube Q3 is connected with the input positive end, the first end of the switch tube Q3 is grounded, and the control end of the switch tube Q3 is connected with the input end of the voltage stabilizing diode D3.

10. The explosion-proof electronic device of claim 9, wherein, The overvoltage protection module comprises an AW32805CSR chip, a resistor R4, a resistor R5, a capacitor C1 and a capacitor C2. The first end of the capacitor C2 is connected with the surge protection module, and the second end of the capacitor C2 is grounded; the first end of the resistor R4 is connected with the input positive end, the second end of the resistor R4 is connected with the first end of the resistor R5, and the second end of the resistor R5 is grounded; the AW32805CSR chip comprises a switch input port, a switch output port and a threshold adjustment port; the switch input port is connected with the input positive end, the threshold adjustment port is connected with the second end of the resistor R4, and the switch output port is connected with the power output module; the first end of the capacitor C1 is connected with the switch output port, and the second end of the capacitor C1 is grounded.