A DC-DC converter with fault self-detection

Abstract

The present invention discloses a DC-DC converter with fault self-detection in the field of power supply control technology, comprising a shell and a sealing cover. The inner cavity of the shell is provided with an automatic switching mechanism and a high-voltage emergency processing mechanism. The high-voltage emergency processing device comprises a No. 1 electromagnet, a No. 2 electromagnet, and a lever. The No. 2 electromagnet is provided on the side of the No. 1 electromagnet, and a lever is provided between the No. 1 electromagnet and the No. 2 electromagnet. The sealing cover is fixedly mounted on the side wall of the shell. The present invention provides a high-voltage emergency processing mechanism. When a sudden fault occurs during operation of the DC-DC converter, resulting in unstable voltage or excessive voltage boost, the high-voltage emergency processing mechanism operates to introduce high voltage into a circuit with a larger resistance, so that the sudden high voltage will not break down and burn the circuit equipment, thereby protecting the circuit components. At the same time, the No. 1 voltage detector detects that the voltage is too high, sends a signal to the user, and repairs the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply control, in particular to a DC-DC converter with fault self-detection. Background Art

[0002] A DC-DC converter is a device that converts DC power into DC power of different voltages. It is widely used in various electronic devices. Its working principle is based on a switching power supply chip. It uses the energy storage characteristics of capacitors and inductors to perform high-frequency switching through a controllable switch (such as MOSFET) to store the input electrical energy in the capacitor or inductor. When the switch is disconnected, the electrical energy is released to the load to provide energy.

[0003] Long-term market research has found that many customers currently use high-voltage modules with DC12V power input. Some customers' devices do not have a DC12V interface but only a DC5V interface, so they need to add a DC12V module to the original equipment, which will increase the cost of the product. In order to reduce customer usage costs and enhance equipment reliability, a high-voltage power module that can use both DC5V and DC12V interfaces and provide emergency protection circuits in the event of a fault is now needed.

[0004] Based on this, the present invention designs a fault self-detecting DC-DC converter to solve the above problem. Summary of the Invention

[0005] The purpose of the present invention is to provide a fault self-detecting DC-DC converter to solve the problem of a high-voltage power supply module proposed in the above background technology that can use DC5V and DC12V interfaces at the same time and can provide emergency protection circuits when a fault occurs.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a DC-DC converter with fault self-detection, comprising a housing and a sealing cover, wherein the inner cavity of the housing is provided with an automatic switching mechanism and a high-voltage emergency processing mechanism, wherein the high-voltage emergency processing device comprises a No. 1 electromagnet, a No. 2 electromagnet, and a lever, wherein a No. 2 electromagnet is provided on the side of the No. 1 electromagnet, a lever is provided between the No. 1 electromagnet and the No. 2 electromagnet, and a sealing cover is fixedly mounted on the side wall of the housing.

[0007] Preferably, the outer wall of the No. 1 electromagnet is provided with a No. 1 coil, the periphery of the No. 1 electromagnet is provided with a No. 1 fixing seat, the No. 1 electromagnet is fixedly mounted on the No. 1 fixing seat, the upper wall of the No. 1 fixing seat is fixedly mounted with a high-voltage contact mounting seat, the upper wall of the No. 1 fixing seat is installed with a support block, the support block is fixedly mounted on the inner wall of the inner cavity of the shell, a movable contact is provided above the No. 1 electromagnet, the upper wall of the support block is fixedly mounted with a contact mounting seat, the bottom of the contact mounting seat is fixedly mounted with a contact, the upper wall of the high-voltage contact mounting seat is fixedly mounted with a high-voltage contact, the high-voltage contact is connected to one end of the No. 1 coil, and the other end of the No. 1 coil is connected There is a resistor, the other end of the resistor is connected to the output pin, a No. 3 fixing seat is provided on the side of the No. 1 electromagnet, and the No. 3 fixing seat is fixedly installed on the inner wall of the inner cavity of the shell, a No. 2 electromagnet is provided on the upper wall of the No. 3 fixing seat, and a No. 2 coil is installed on the outer wall of the No. 2 electromagnet, the contact is connected to one end of the No. 2 coil, and the other end of the No. 2 coil is connected to the output pin, a support column is provided above the No. 2 electromagnet, and the support column is fixedly installed on the inner wall of the inner cavity of the shell, a lever is rotatably installed on the front end of the support column, and a No. 1 permanent magnet is fixedly installed on the end of the lever close to the No. 2 electromagnet, and a No. 1 voltage detector is provided between the output pins.

[0008] Preferably, the automatic switching mechanism includes a No. 3 electromagnet and a support rod, a No. 3 coil is provided on the outer wall of the No. 3 electromagnet, a No. 2 fixing seat is provided on the periphery of the No. 3 electromagnet, the No. 3 electromagnet is fixedly installed on the upper wall of the No. 2 fixing seat, the No. 2 fixing seat is fixedly installed in the inner cavity of the shell, a battery is fixedly installed on the side of the No. 2 fixing seat, a support rod is provided above the No. 3 electromagnet, a No. 2 support column is provided at one end of the support rod, the No. 2 support column is fixedly installed in the inner cavity of the shell, a No. 2 permanent magnet is fixedly installed in the middle of the support rod, a conductive contact is provided on the top of the support rod, a low voltage interface is fixedly installed above the conductive contact, and a high voltage interface is fixedly installed below the conductive contact.

[0009] Preferably, two fixing holes are provided on the contact mounting seat, two fixing blocks are provided on the upper wall of the support block, the fixing blocks cooperate with the fixing holes, a fixing rod is provided on the side wall of the high-voltage contact mounting seat, a fixing opening is provided on the bottom side wall of the support block, the fixing rod cooperates with the fixing opening, a groove is provided on the lower part of the support block, a fixing strip is provided on the upper wall of the groove, and the groove cooperates with the high-voltage contact mounting seat.

[0010] Preferably, the movable contact is provided in two sections, the two sections of the movable contact are connected by a hinge, the upper arm of the movable contact is provided with two mounting caps, a rubber band is provided between the two mounting caps, a wire is provided in the inner cavity of the movable contact, and the wire is provided in an S shape.

[0011] Preferably, limiting rings are provided at both ends of the No. 2 electromagnet, and a limiting groove is provided on the inner wall of the No. 3 fixing seat. The limiting rings cooperate with the limiting grooves. A limiting block is fixedly installed at the front end of the support column, and a mounting ring is rotatably fixedly installed at the top end of the support column.

[0012] Preferably, a partition is provided in the middle of the No. 2 fixing seat, and the partition is provided with two wire holes, and the two ends of the No. 3 coil pass through the wire holes and are fixedly connected to the positive and negative poles of the battery.

[0013] Preferably, the upper wall of the high voltage interface is provided with silver-plated contacts, the lower wall of the low voltage interface is provided with silver-plated contacts, an input pin is provided above the support rod, a No. 2 voltage detector is provided behind the input pin, and the input pin is provided with a connecting wire connected to the conductive contact.

[0014] Preferably, the side wall of the housing is provided with a sealing ring, and the sealing ring cooperates with the sealing cover.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a high-voltage emergency processing mechanism. When a sudden fault occurs during the operation of the DC-DC converter, resulting in voltage instability or excessive voltage boost, the high-voltage emergency processing mechanism will operate to introduce high voltage into the circuit with greater resistance, so that the sudden high voltage will not break down and burn the circuit equipment, thereby protecting the circuit components. At the same time, the No. 1 voltage detector detects that the voltage is too high and sends a signal to the user to repair the equipment.

[0017] 2. The present invention is provided with an automatic switching mechanism. When the input terminal is connected, the connected voltage is detected by the No. 2 voltage detector. When it is detected that the voltage is suitable for use with the DC5V module, the No. 2 voltage detector allows the battery to send a signal, the battery starts working, and the interface is connected to the low-voltage interface. If it is detected that the voltage is suitable for use with the DC12V module, the interface is connected to the high-voltage interface, realizing automatic switching and having higher practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the internal perspective structure of the present invention;

[0020] Figure 2This is a schematic diagram of the main perspective structure of the present invention;

[0021] Figure 3 This is a structural diagram of the high-voltage emergency treatment mechanism of the present invention;

[0022] Figure 4 This is a structural diagram of the automatic switching mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the present invention from a top view;

[0025] Figure 7 This is a schematic cross-sectional view of the high-voltage emergency treatment mechanism of the present invention;

[0026] Figure 8 This is a schematic cross-sectional view of the high-voltage emergency treatment mechanism of the present invention;

[0027] Figure 9 For the present invention Figure 8 A in the middle is an enlarged view of the structure;

[0028] Figure 10 This is the principle of the self-excited push-pull circuit of the present invention;

[0029] Figure 11 Single-ended flyback voltage and current waveforms.

[0030] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0031] 1-housing, 2-input pin, 3-sealing cover, 4-output pin, 5-contact, 6-moving contact, 7-high voltage contact, 8-electromagnet No. 1, 9-coil No. 1, 10-fixed seat No. 1, 11-resistor, 12-voltage detector No. 1, 13-coil No. 2, 14-electromagnet No. 2, 15-limiting ring, 16-limiting slot, 17-permanent magnet No. 1, 18-lever, 19-voltage detector No. 2, 20-low voltage interface, 21-support rod, 22-battery, 23-electromagnet No. 3, 24-coil No. 3, 25-No. 2 permanent magnet, 26-No. 2 fixing seat, 27-silver-plated contact, 28-high voltage interface, 29-mounting ring, 30-limit block, 31-support column, 32-mounting cap, 33-rubber band, 34-high voltage contact mounting seat, 35-fixing block, 36-fixing hole, 38-sealing ring, 39-wire, 40-hinge, 41-fixing bar, 42-support block, 43-fixing rod, 44-fixing port, 45-connecting wire, 46-wire hole, 47-conductive contact, 48-No. 3 fixing seat, 49-contact mounting seat. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Please see the attached Figure 1 The present invention provides a technical solution: a DC-DC converter with fault self-detection, comprising a shell 1 and a sealing cover 3, the inner cavity of the shell 1 is provided with an automatic switching mechanism and a high-voltage emergency processing mechanism, the high-voltage emergency processing device includes a No. 1 electromagnet 8, a No. 2 electromagnet 14, and a lever 18, a No. 2 electromagnet 14 is provided on the side of the No. 1 electromagnet 8, a lever 18 is provided between the No. 1 electromagnet 8 and the No. 2 electromagnet 14, and the sealing cover 3 is fixedly installed on the side wall of the shell 1.

[0034] Please see the attached Figure 1 , Attachment Figure 3 and attached Figure 6 , a No. 1 coil 9 is installed on the outer wall of the No. 1 electromagnet 8, a No. 1 fixing seat 10 is provided on the periphery of the No. 1 electromagnet 8, the No. 1 electromagnet 8 is fixedly mounted on the No. 1 fixing seat 10, a high-voltage contact mounting seat 34 is fixedly mounted on the upper wall of the No. 1 fixing seat 10, a support block 42 is installed on the upper wall of the No. 1 fixing seat 10, the support block 42 is fixedly mounted on the inner wall of the inner cavity of the shell 1, a moving contact 6 is provided above the No. 1 electromagnet 8, a contact mounting seat 49 is fixedly mounted on the upper wall of the support block 42, a contact 5 is fixedly mounted on the bottom of the contact mounting seat 49, a high-voltage contact 7 is fixedly mounted on the upper wall of the high-voltage contact mounting seat 34, the high-voltage contact 7 is connected to one end of the No. 1 coil 9, the other end of the No. 1 coil 9 is connected to a resistor 11, the other end of the resistor 11 is connected to the output pin 4, a No. 3 fixing seat 48 is provided on the side of the No. 1 electromagnet 8, the No. 3 fixing seat 48 is fixed It is installed on the inner wall of the inner cavity of the shell 1, and the upper wall of the No. 3 fixing seat 48 is provided with the No. 2 electromagnet 14, and the No. 2 coil 13 is installed on the outer wall of the No. 2 electromagnet 14. The contact 5 is connected to one end of the No. 2 coil 13, and the other end of the No. 2 coil 13 is connected to the output pin 4. A support column 31 is provided above the No. 2 electromagnet 14, and the support column 31 is fixedly installed on the inner wall of the inner cavity of the shell 1. A lever 18 is rotatably installed at the front end of the support column 31, and a No. 1 permanent magnet 17 is fixedly installed at one end of the lever 18 close to the No. 2 electromagnet 14. A No. 1 voltage detector 12 is provided between the output pins 4. Through the provided electromagnet, when the voltage is too large, the No. 2 electromagnet 14 generates magnetic force, which causes a repulsive force with the No. 1 permanent magnet 17, thereby pushing the movable contact 6 to move, so that it is connected to a circuit with a higher resistance 11, thereby protecting the components.

[0035] Please see the attached Figure 1 , Attachment Figure 4and attached Figure 5 The automatic switching mechanism includes a No. 3 electromagnet 23 and a support rod 21. The outer wall of the No. 3 electromagnet 23 is provided with a No. 3 coil 24. The outer periphery of the No. 3 electromagnet 23 is provided with a No. 2 fixing seat 26. The No. 3 electromagnet 23 is fixedly mounted on the upper wall of the No. 2 fixing seat 26. The No. 2 fixing seat 26 is fixedly mounted on the inner cavity of the shell 1. A battery 22 is fixedly mounted on the side of the No. 2 fixing seat 26. A support rod 21 is provided above the No. 3 electromagnet 23. A No. 2 support column is provided at one end of the support rod 21. The No. 2 support column is fixedly mounted on the inner cavity of the shell 1. The support rod 21 A No. 2 permanent magnet 25 is fixedly installed in the middle, a conductive contact 47 is provided at the top of the support rod 21, a low-voltage interface 20 is fixedly installed above the conductive contact 47, and a high-voltage interface 28 is fixedly installed below the conductive contact 47. The input voltage is detected by the No. 2 voltage detector 19, and the detection result is sent to the battery 22. The battery 22 adjusts the current direction according to the detection result, so that the No. 3 electromagnet 23 produces different magnetic poles, thereby realizing the attraction and repulsion control of the No. 2 permanent magnet 25 and realizing automatic switching of the interface.

[0036] Please see the attached Figure 1-9 , the contact mounting seat 49 is provided with two fixing holes 36, the upper wall of the support block 42 is provided with two fixing blocks 35, the fixing blocks 35 and the fixing holes 36 cooperate with each other, the side wall of the high-voltage contact mounting seat 34 is provided with a fixing rod 43, the bottom side wall of the support block 42 is provided with a fixing port 44, the fixing rod 43 and the fixing port 44 cooperate with each other, the lower part of the support block 42 is provided with a groove, the upper wall of the groove is provided with a fixing strip 41, the groove cooperates with the high-voltage contact mounting seat 34, the movable contact 6 is set in two sections, and the two-section movable contact 6 are connected by a hinge 40. Two mounting caps 32 are provided on the upper arm of the movable contact 6. A rubber band 33 is provided between the two mounting caps 32. A wire 39 is provided in the inner cavity of the movable contact 6. The wire 39 is arranged in an S shape. Limiting rings 15 are provided at both ends of the No. 2 electromagnet 14. A limiting groove 16 is provided on the inner wall of the No. 3 fixing seat 48. The limiting ring 15 and the limiting groove 16 cooperate with each other. A limiting block 30 is fixedly installed at the front end of the support column 31, and a mounting ring 29 is rotatably fixedly installed at the top of the support column 31.

[0037] Please see the attached Figure 1 , Attachment Figure 3 Attachment Figure 4 and attached Figure 5 A partition is provided in the middle of the No. 2 fixing seat 26, and the partition has two wire holes 46. The two ends of the No. 3 coil 24 pass through the wire holes 46 and are fixedly connected to the positive and negative poles of the battery 22. A silver-plated contact 27 is provided on the upper wall of the high voltage interface 28, and a silver-plated contact 27 is provided on the lower wall of the low voltage interface 20. An input pin 2 is provided above the support rod 21, and a No. 2 voltage detector 19 is provided behind the input pin 2. The input pin 2 is provided with a connecting wire 45 connected to the conductive contact 47.

[0038] Please see the attached Figure 6 A sealing ring 38 is provided on the side wall of the housing 1, and the sealing ring 38 cooperates with the sealing cover 3. Through the cooperation between the sealing cover 3 and the sealing ring 38, the sealing cover 3 is installed more firmly and has better sealing performance.

[0039] Example 1

[0040] A specific application of this embodiment is: when the present invention is used, Figure 10 The circuit principle of this device is as follows: Figure 11 This is the waveform diagram of the single-ended flyback voltage and current of this device. First, the device is installed. When in use, a sudden fault occurs and the input voltage is too high. At this time, the voltage is too high through the No. 1 voltage detector 12, and a signal is sent to the user. At the same time, because the output voltage is too high, the magnetic force generated by the No. 2 electromagnet 14 is enhanced. The enhanced magnetic force generated by the No. 2 electromagnet 14 and the mutual repulsion generated by the No. 1 permanent magnet 17 set above the No. 2 electromagnet 14 are enhanced, causing the No. 1 permanent magnet 17 to move upward. The upward movement of the No. 1 permanent magnet 17 drives the lever 18 to move, causing the other end of the lever 18 to move downward. The downward movement of the other end of the lever 18 pushes the moving contact 6 downward, causing the moving contact 6 to disconnect from the contact 5 and connect to the high-voltage contact 7. When the movable contact 6 moves downward, the rubber band 33 is pulled to stretch. At this time, the movable contact 6 is connected to the high-voltage contact 7, so that the No. 1 electromagnet 8 generates magnetic force. The No. 1 electromagnet 8 generates magnetic force and generates attraction with the movable contact 6, so that the movable contact 6 will not rebound. After being connected to the high-voltage contact 7, the circuit is provided with a resistor 11, so that the incoming high-voltage current is reduced in voltage, and the components are provided with emergency protection so that they will not burn under sudden high-voltage electricity. When the user receives the information that the voltage is too high, the power supply is disconnected, the No. 1 electromagnet 8 loses its magnetic force, and the rubber band 33 contracts, so that the movable contact 6 is reset. The staff then inspects the device. Through this device, the equipment components are protected in the event of a sudden failure, the loss is reduced, and the device has good usability.

[0041] Example 2

[0042] A specific application of this embodiment is as follows: when the present invention is in use, the power supply is connected to the input pin 2, and then the power supply enters the interior through the input pin 2. The input voltage is detected by the second voltage detector 19. If the detected voltage meets the voltage used by DC5V, the second voltage detector 19 sends a signal to the battery 22. After receiving the signal, the battery 22 starts to generate a magnetic force on the third electromagnet 23. Since the third electromagnet 23 generates a magnetic force, it generates an interaction force with the second permanent magnet 25 set above the third electromagnet 23, so that the second permanent magnet 25 moves upward. The upward movement of the second permanent magnet 25 drives the support rod 21 to rotate upward. The upward rotation of the support rod 21 causes the conductive contact 47 set on the top of the support rod 21 to move upward, and the conductive contact 47 moves to the It moves upward and is connected to the low voltage interface 20. If the detected voltage meets the voltage used by DC12V, the No. 2 voltage detector 19 sends a signal to the electromagnet 22. After the battery receives the signal, it generates an opposite current, causing the No. 3 electromagnet 23 to generate opposite magnetic poles, causing the No. 2 permanent magnet 25 to attract each other, causing the No. 2 permanent magnet 25 to move downward. The No. 2 permanent magnet 25 moves downward and drives the support rod 21 to rotate downward. The support rod 21 rotates downward to cause the conductive contact 47 to move downward. The conductive contact 47 moves downward to connect with the high voltage interface 28. The No. 2 voltage detector 19 is set to detect the voltage size and control the direction of the current by sending different signals to the battery 22, so that the interface connection can be automatically switched. It has good usability and can avoid sudden failures during use. Figure 10 The circuit principle of this device is as follows: Figure 11 This is the waveform diagram of the single-ended flyback voltage and current of the device. The input voltage is too high. At this time, the voltage is too high through the No. 1 voltage detector 12, and a signal is sent to the user. At the same time, because the output voltage is too high, the magnetic force generated by the No. 2 electromagnet 14 is enhanced. The magnetic force generated by the No. 2 electromagnet 14 is enhanced and the mutual repulsion force generated by the No. 1 permanent magnet 17 set above the No. 2 electromagnet 14 is enhanced, causing the No. 1 permanent magnet 17 to move upward. The upward movement of the No. 1 permanent magnet 17 drives the lever 18 to move, causing the other end of the lever 18 to move downward. The downward movement of the other end of the lever 18 pushes the moving contact 6 downward, causing the moving contact 6 to disconnect from the contact 5. When it is connected to the high-voltage contact 7 and the movable contact 6 moves downward, the rubber band 33 is pulled to stretch. At this time, the movable contact 6 is connected to the high-voltage contact 7, so that the No. 1 electromagnet 8 generates magnetic force. The No. 1 electromagnet 8 generates magnetic force and generates attraction with the movable contact 6, so that the movable contact 6 will not rebound. After being connected to the high-voltage contact 7, the circuit is provided with a resistor 11, so that the incoming high-voltage current is reduced in voltage, and the components are provided with emergency protection so that they will not burn under sudden high-voltage electricity. When the user receives the information that the voltage is too high, the power supply is disconnected, the No. 1 electromagnet 8 loses its magnetic force, and the rubber band 33 contracts, so that the movable contact 6 is reset. The staff then inspects the device.

[0043] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0044] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A DC-DC converter with fault self-detection, comprising a housing (1) and a sealing cover (3), characterized in that: The inner cavity of the housing (1) is provided with an automatic switching mechanism and a high-voltage emergency processing mechanism, the high-voltage emergency processing mechanism comprises a No. 1 electromagnet (8), a No. 2 electromagnet (14), and a lever (18), the No. 2 electromagnet (14) is provided on the side of the No. 1 electromagnet (8), and a lever (18) is provided between the No. 1 electromagnet (8) and the No. 2 electromagnet (14), and a sealing cover (3) is fixedly installed on the side wall of the housing (1); The outer wall of the No. 1 electromagnet (8) is provided with a No. 1 coil (9), the outer periphery of the No. 1 electromagnet (8) is provided with a No. 1 fixing seat (10), the No. 1 electromagnet (8) is fixedly mounted on the No. 1 fixing seat (10), the upper wall of the No. 1 fixing seat (10) is fixedly mounted with a high-voltage contact mounting seat (34), the upper wall of the No. 1 fixing seat (10) is provided with a support block (42), the support block (42) is fixedly mounted on the inner wall of the inner cavity of the shell (1), a movable contact (6) is provided above the No. 1 electromagnet (8), the upper wall of the support block (42) is fixedly mounted with a contact mounting seat (49), the bottom of the contact mounting seat (49) is fixedly mounted with a contact (5), the upper wall of the high-voltage contact mounting seat (34) is fixedly mounted with a high-voltage contact (7), the high-voltage contact (7) is connected to one end of the No. 1 coil (9), the other end of the No. 1 coil (9) is connected to a resistor (11), the The other end of the resistor (11) is connected to the output pin (4), a No. 3 fixing seat (48) is provided on the side of the No. 1 electromagnet (8), and the No. 3 fixing seat (48) is fixedly installed on the inner wall of the inner cavity of the shell (1), a No. 2 electromagnet (14) is provided on the upper wall of the No. 3 fixing seat (48), and a No. 2 coil (13) is installed on the outer wall of the No. 2 electromagnet (14), the contact (5) is connected to one end of the No. 2 coil (13), and the other end of the No. 2 coil (13) is connected to the output pin (4), a support column (31) is provided above the No. 2 electromagnet (14), and the support column (31) is fixedly installed on the inner wall of the inner cavity of the shell (1), and a lever (18) is rotatably installed at the front end of the support column (31), and a No. 1 permanent magnet (17) is fixedly installed on one end of the lever (18) close to the No. 2 electromagnet (14), and a No. 1 voltage detector (12) is provided between the output pins (4).

2. The DC-DC converter with fault self-detection according to claim 1, characterized in that: The automatic switching mechanism comprises a No. 3 electromagnet (23) and a support rod (21), wherein the outer wall of the No. 3 electromagnet (23) is provided with a No. 3 coil (24), the outer periphery of the No. 3 electromagnet (23) is provided with a No. 2 fixing seat (26), the No. 3 electromagnet (23) is fixedly mounted on the upper wall of the No. 2 fixing seat (26), the No. 2 fixing seat (26) is fixedly mounted in the inner cavity of the shell (1), and a battery (22) is fixedly mounted on the side of the No. 2 fixing seat (26), a support rod (21) is provided above the No. 3 electromagnet (23), a No. 2 support column is provided at one end of the support rod (21), the No. 2 support column is fixedly mounted in the inner cavity of the shell (1), a No. 2 permanent magnet (25) is fixedly mounted in the middle of the support rod (21), a conductive contact (47) is provided at the top of the support rod (21), a low voltage interface (20) is fixedly mounted above the conductive contact (47), and a high voltage interface (28) is fixedly mounted below the conductive contact (47).

3. The DC-DC converter with fault self-detection according to claim 1, characterized in that: Two fixing holes (36) are provided on the contact mounting seat (49), two fixing blocks (35) are provided on the upper wall of the support block (42), and the fixing blocks (35) cooperate with the fixing holes (36). A fixing rod (43) is provided on the side wall of the high-voltage contact mounting seat (34), and a fixing opening (44) is provided on the bottom side wall of the support block (42), and the fixing rod (43) cooperates with the fixing opening (44). A groove is provided on the lower part of the support block (42), and a fixing strip (41) is provided on the upper wall of the groove, and the groove cooperates with the high-voltage contact mounting seat (34).

4. The DC-DC converter with fault self-detection according to claim 1, characterized in that: The movable contact (6) is provided in two sections, and the two sections of the movable contact (6) are connected via a hinge (40). The upper arm of the movable contact (6) is provided with two mounting caps (32), and a rubber band (33) is provided between the two mounting caps (32). A wire (39) is provided in the inner cavity of the movable contact (6), and the wire (39) is provided in an S shape.

5. The DC-DC converter with fault self-detection according to claim 1, characterized in that: Limiting rings (15) are provided at both ends of the No. 2 electromagnet (14), and a limiting groove (16) is provided on the inner wall of the No. 3 fixing seat (48). The limiting ring (15) cooperates with the limiting groove (16). A limiting block (30) is fixedly installed at the front end of the support column (31), and a mounting ring (29) is rotatably fixedly installed at the top end of the support column (31).

6. The DC-DC converter with fault self-detection according to claim 2, characterized in that: A partition is provided in the middle of the No. 2 fixing seat (26), and the partition is provided with two wire holes (46). Both ends of the No. 3 coil (24) pass through the wire holes (46) and are fixedly connected to the positive and negative poles of the battery (22).

7. The DC-DC converter with fault self-detection according to claim 2, characterized in that: The upper wall of the high voltage interface (28) is provided with a silver-plated contact (27), the lower wall of the low voltage interface (20) is provided with a silver-plated contact (27), an input pin (2) is provided above the support rod (21), a second voltage detector (19) is provided behind the input pin (2), and the input pin (2) is provided with a connecting wire (45) connected to the conductive contact (47).

8. The DC-DC converter with fault self-detection according to claim 1, characterized in that: A sealing ring (38) is provided on the side wall of the housing (1), and the sealing ring (38) cooperates with the sealing cover (3).

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