Fault detection equipment for automobile charging pile hub

Abstract

The invention belongs to the technical field of automobile charging pile fault detection, and particularly relates to an automobile charging pile hub fault detection device which comprises a gun body, the end face of the gun body is fixedly connected with a butt joint, one side of the butt joint is provided with a charging head, and the end faces of the butt joint and the charging head are each provided with a plurality of charging holes. Conductive columns are arranged in the butt joint and the charging head; the conductive column on the left side is electrically connected with a butt joint, the inner wall of the charging head is fixedly connected with an annular shell, and the conductive column on the right side is fixedly connected with the annular shell. A conduction block is movably connected between the two conductive columns located on the same axis, a high-temperature circuit breaking assembly is arranged on the upper sides of the conductive columns, and an elastic supporting assembly is arranged on the lower side of the conduction block. According to the invention, independent temperature detection and control can be carried out on the conductive column on the charging gun, if the charging temperature is detected to be too high, automatic power off is carried out, and safety and reliability are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile charging pile fault detection, and in particular relates to a fault detection device for an automobile charging pile line. Background Art

[0002] The cable collection structure can organize and store the cables connected to the charging gun. For example, the cables can be neatly wound through the reel to prevent them from being scattered or entangled when not in use. This not only keeps the charging area tidy, but also avoids damage to the cables due to long-term dragging and bending, thereby extending the service life of the cables and charging gun.

[0003] Some cable hubs are equipped with charging gun holders, which can be fixed to the charging pile body when the charging gun is not in use. This provides a fixed storage location for the charging gun, making it convenient for users to access it. It can also protect the charging gun from external damage such as collisions and scratches.

[0004] During the charging process of a car, the charging gun is the part most susceptible to damage. Affected by external factors, high temperatures may occur during charging. For example, if the charging gun is not fully inserted into the car's charging port, the contact area between the pin and the socket is insufficient, the contact resistance increases, and the heat generation increases dramatically (the greater the resistance, the more heat is generated). In addition, after long-term use, the surface of the conductive post oxidizes, the plating wears, or dust and oil accumulate, leading to increased contact resistance. For example, copper pins oxidize to form copper oxide, which reduces conductivity and causes excessive temperature.

[0005] The most common failure mode is that some users fail to reset the charging gun in time after charging, causing the charging gun to detach from the slot on the charging pile and fall to the ground. The internal space of the conductive column is prone to adhesion of dirt, stones and other impurities. When other users use it, the conductive column will not be in complete contact with the car charging port, thereby increasing the heat temperature during charging and posing a safety accident. Summary of the Invention

[0006] The purpose of the present invention is to provide a fault detection device for automobile charging pile wiring, which can independently detect and control the temperature of the conductive column on the charging gun. If the charging temperature is detected to be too high, the power will be automatically cut off, which is safe and reliable.

[0007] The technical solutions adopted by the present invention are as follows:

[0008] A fault detection device for a car charging pile line collection device includes a gun body, a butt joint fixedly connected to the end face of the gun body, a charging head assembled on one side of the butt joint, a plurality of charging holes respectively formed on the end faces of the butt joint and the charging head, and conductive posts disposed in both the butt joint and the charging head;

[0009] The conductive post on the left is electrically connected to the docking connector, the inner wall of the charging head is fixedly connected to an annular shell, and the conductive post on the right is fixedly connected to the annular shell;

[0010] A conducting block is movably connected between the two conducting posts on the same axis. A high-temperature circuit breaker assembly is provided on the upper side of the conducting post, and an elastic support assembly is provided on the lower side of the conducting block.

[0011] Furthermore, the high-temperature circuit breaker assembly includes a push rod movably connected to the inner wall of the annular shell on the upper side, the bottom end of the push rod passes through the annular shell and is fixedly connected to a push plate, the push plate is located on the upper side of the conduction block, the cross-section of the push rod is a T-shaped structure, the side wall of the push rod is located in the inner cavity of the annular shell and is sleeved with a first spring, and when the push rod is in the initial state, the first spring is in a compressed state;

[0012] A temperature control component is provided on the left end surface of the conductive column on the right.

[0013] Furthermore, the temperature control component includes a high-temperature deformation rod fixedly connected to the left end face of the right conductive column, a socket is provided on the side wall of the top rod, the high-temperature deformation rod is plugged into the socket, the other end of the high-temperature deformation rod is fixedly connected to a steel wire, the other end of the steel wire is fixedly connected to a hanging ring, the inner wall of the annular shell is fixedly connected to a tension spring, and the hanging ring is hung with the tension spring.

[0014] Furthermore, a limiting groove is provided on the side wall of the push rod, and the limiting groove is connected to the insertion hole.

[0015] Furthermore, the end surfaces of the opposite ends of the conductive pillars are respectively provided with T-shaped slots, the cross section of the conductive block is an I-shaped structure, and the conductive block is adapted to the T-shaped slots.

[0016] Furthermore, the elastic support assembly includes a lifting rod arranged in the annular shell, a positioning hole is provided on the side wall of the charging hole, the lifting rod is slidably connected to the positioning hole, the top end of the lifting rod extends into the annular shell and is fixedly connected to a support plate, a through groove is provided on the side wall of the annular shell, the support plate is adapted to the through groove, and in the initial state, the support plate is located on the lower side of the conduction block, a second spring is sleeved on the side wall of the lifting rod, a cavity is provided on the bottom surface of the positioning hole, and a lifting and resetting assembly is provided in the cavity.

[0017] Furthermore, the lifting and resetting assembly includes a micro motor fixedly mounted on the bottom surface of the cavity, the output end of the micro motor is fixedly connected to a screw, the side wall of the screw is threadedly connected to a sleeve, the side wall of the sleeve is fixedly connected to a push rod, the diameter of the push rod is smaller than the diameter of the positioning hole, and the push rod and the positioning hole are on the same central axis, and the push rod is located at the lowermost side of the screw in the initial state.

[0018] Furthermore, the side wall of the cavity is fixedly connected with a vertical rod, and the vertical rod passes through the threaded sleeve and is movably connected thereto.

[0019] Furthermore, the side walls of the T-shaped slot are respectively provided with a plurality of arc dispersion channels.

[0020] Furthermore, an inspection light strip is installed on the inner wall of the charging hole, and the inspection light strip is ring-shaped.

[0021] The technical effects achieved by the present invention are:

[0022] The present invention provides a fault detection device for a car charging pile line collection system. Through the mutual cooperation among the charging head, the conductive column, the conductive block and the high-temperature circuit breaker component, during the charging process of the car, if the charging temperature is higher than the tolerance range of the high-temperature deformation rod, deformation occurs, and the return elastic force of the first spring is used to press down and push the conductive block down, so as to disconnect the conduction between the conductive columns on both sides and realize the power-off operation of the charging gun, which has high safety.

[0023] The fault detection device for a car charging pile line collection of the present invention cooperates with each other among a temperature control component, an elastic support component and a lifting and resetting component. When the temperature of the conductive column returns to normal temperature, the micro motor is started to push the elastic support component to rise, thereby driving the conductive block to rise between the conductive columns on both sides. At the same time, the force of the tension spring is used to insert the high-temperature deformation rod into the socket again, which is convenient for the next charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall stereogram of the present invention;

[0025] Figure 2 is a three-dimensional diagram of the charging head of the present invention;

[0026] Figure 3 1 is a schematic cross-sectional view of the charging head of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure inside the annular shell of the present invention;

[0028] Figure 5 It is a schematic structural diagram of the high-temperature circuit breaker assembly of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the elastic support assembly of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the conductive block of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the conductive column of the present invention;

[0032] Figure 9 This invention Figure 4 A magnified view of point A in the figure;

[0033] Figure 10 This invention Figure 3 Enlarged view of point B in .

[0034] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0035] 1. Gun body; 2. Connector; 3. Charging head; 4. Inspection light strip; 5. Conductive column; 6. Conductive block; 7. T-slot; 8. Charging hole; 9. Ring shell; 10. Push rod; 11. First spring; 12. Push plate; 13. High-temperature deformation rod; 14. Socket; 15. Steel wire; 16. Tension spring; 17. Hanging ring; 18. Limiting groove; 19. Lifting rod; 20. Support plate; 21. Second spring; 22. Positioning hole; 23. Cavity; 24. Micro motor; 25. Screw; 26. Screw sleeve; 27. Push rod; 28. Vertical rod; 29. ​​Arc dispersion channel. DETAILED DESCRIPTION

[0036] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following examples. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0037] Example 1:

[0038] like Figures 1-10 As shown, a fault detection device for a car charging pile line collection device includes a gun body 1, a butt joint 2 is fixedly connected to the end face of the gun body 1, and a charging head 3 is assembled on one side of the butt joint 2. Specifically, a mounting hole is opened on the end face of the charging head 3, and a bolt is movably connected in the mounting hole. The other end of the bolt is threadedly connected to the butt joint 2, and a sealing ring is assembled between the butt joint 2 and the charging head 3 to increase the sealing performance and avoid rainwater infiltration when used outdoors, thereby effectively extending its service life. In addition, with this connection method, if the internal fault detection structure has a problem, it can be quickly disassembled for maintenance; a plurality of charging holes 8 are respectively opened on the end faces of the butt joint 2 and the charging head 3, and conductive columns 5 are arranged in the butt joint 2 and the charging head 3.

[0039] The left conductive post 5 is electrically connected to the docking connector 2, and the inner wall of the charging head 3 is fixedly connected to the annular shell 9. The right conductive post 5 is fixedly connected to the annular shell 9;

[0040] What needs to be explained in this part is that the connector 2 and the charging head 3 are installed in a disconnected manner, which can be understood as dividing the existing charging gun head into two. In the existing high-temperature fault detection of the charging gun, temperature sensors are generally set at the position where multiple conductive columns 5 are connected to the cable for detection. However, this detection method has great limitations and cannot detect live wires or other heating signal lines. It can only perform detection in large areas. Moreover, the components of the temperature sensor are highly sensitive. When used outdoors (especially in public charging piles), they are prone to falling, impacting, pulling, etc., which can easily cause the temperature sensor to fail or the detection data to be inaccurate, causing the user to stop charging or be unable to charge during the charging process.

[0041] A conducting block 6 is movably connected between two conducting posts 5 located on the same axis. A high-temperature circuit breaker assembly is provided on the upper side of the conducting post 5 , and an elastic support assembly is provided on the lower side of the conducting block 6 .

[0042] Specifically, such as Figure 4 and Figure 9 As shown, the high-temperature circuit breaker assembly includes a push rod 10 movably connected to the inner wall of the annular shell 9 on the upper side. The bottom end of the push rod 10 passes through the annular shell 9 and is fixedly connected to a push plate 12. The push plate 12 is located on the upper side of the conductive block 6. The cross-section of the push rod 10 is a T-shaped structure. The side wall of the push rod 10 is located in the inner cavity of the annular shell 9 and is sleeved with a first spring 11. In the initial state of the push rod 10, the first spring 11 is in a compressed state.

[0043] A temperature control component is provided on the left end surface of the right conductive column 5 .

[0044] T-shaped slots 7 are respectively formed on opposite end surfaces of the conductive pillars 5 . The cross section of the conductive block 6 is an I-shaped structure, and the conductive block 6 is adapted to the T-shaped slots 7 .

[0045] When one end of the conductive post 5 experiences an abnormally high temperature due to overload, poor contact, or other factors, the high temperature softens the high-temperature deformable rod 13, reducing its limiting strength. The rod 13 then rapidly descends due to the action of the first spring 11, actively disconnecting the circuit. This process, independent of the charging station's control system, provides local, real-time protection for the charging gun, offering a faster response and preventing overheating and runaway caused by control system delays.

[0046] Furthermore, traditional overcurrent protection relies on a blown fuse or disconnected solid-state relay, requiring component replacement or cooling. However, once the temperature of the high-temperature deformable rod 13 drops, the connection is quickly restored, reducing maintenance costs and improving the user experience. The sliding conductive block 6 utilizes a T-shaped slot 7 to tightly fit between the two conductive posts 5, compensating for changes in contact gap caused by vibration and wear, reducing contact resistance and ultimately minimizing heat generation during normal operation.

[0047] In addition, the two-section conductive column 5 disperses heat to different areas. Combined with the metal material of the sliding conductive block 6 (such as a high thermal conductivity copper alloy), it can improve the heat dissipation efficiency through multi-path heat conduction and avoid heat accumulation at a single point. It is also possible to set a thermal conductive metal wire or heat dissipation fin to extend to the outside and protect it with a hollow shell to improve the heat dissipation effect.

[0048] Example 2:

[0049] Based on Example 1, this example specifically describes the reset structure of the high-temperature circuit breaker assembly:

[0050] Specifically, such as Figure 9 As shown, the temperature control assembly includes a high-temperature deformation rod 13 fixedly connected to the left end face of the right conductive column 5, a socket 14 is opened on the side wall of the top rod 10, the high-temperature deformation rod 13 is plugged into the socket 14, the other end of the high-temperature deformation rod 13 is fixedly connected to a steel wire 15, the other end of the steel wire 15 is fixedly connected to a hanging ring 17, the inner wall of the annular shell 9 is fixedly connected to a tension spring 16, and the hanging ring 17 is hung with the tension spring 16.

[0051] A limiting groove 18 is defined on the side wall of the push rod 10 , and the limiting groove 18 is communicated with the insertion hole 14 .

[0052] When the high-temperature deformation rod 13 softens and disengages from the insertion hole 14, it is restricted by the steel wire 15 and is located in the limiting groove 18. Its end face abuts against the limiting groove 18, so that it can accurately enter the insertion hole 14 when resetting.

[0053] Furthermore, traditional electronic temperature control solutions (such as thermistors + MCUs) rely on the internal power supply of the charging station or charging gun. If the circuit loses power due to a short circuit, overload, or other fault, the electronic protection may fail. However, this solution triggers mechanical action through the thermophysical properties of the material (the thermally induced strength change of the high-temperature deformation rod 13), completely independent of electrical energy. Even if the charging gun loses power, it can still directly trigger disconnection through temperature increase, ensuring the effectiveness of this "last line of defense." Furthermore, the mechanical structure is unaffected by high-frequency electromagnetic interference (such as the strong electromagnetic field during fast charging), preventing misjudgment or delays of electronic components, making it suitable for complex electromagnetic environments.

[0054] Specifically, the high-temperature deformable rod 13 is made of a heat-sensitive material (such as a shape memory alloy or a composite metal with significantly different thermal expansion coefficients), preferably a nickel-based alloy. This extends the material's durability and prevents performance degradation after multiple thermal cycles. Its strength decreases in a step-like manner as the temperature rises. When the temperature reaches a preset critical value (such as 120°C), the deformable rod undergoes thermal expansion or phase change, resulting in a reduction in cross-sectional area and structural instability, precisely releasing the restraining force of the first spring 11. This triggering mechanism, based on the intrinsic properties of the material, is more resistant to environmental fluctuations than software threshold settings for electronic temperature control (for example, preventing interference from humidity and vibration on electronic components).

[0055] The high-temperature deformation rod 13 and the conductive column 5 are designed to have a heat conduction path (such as direct contact or thermal adhesive connection). The action is triggered only when the local temperature of the conductive column 5 reaches the fault threshold, rather than the ambient temperature. For example, if the charging gun shell temperature is normal but the internal contact point is overheated due to oxidation, the high-temperature deformation rod 13 will first sense the heat of the conductive column 5, achieving a precise response to the fault point.

[0056] like Figure 4 and Figure 6 As shown, the elastic support assembly includes a lifting rod 19 arranged in the annular shell 9, a positioning hole 22 is provided on the side wall of the charging hole 8, the lifting rod 19 is slidably connected to the positioning hole 22, the top of the lifting rod 19 extends into the annular shell 9 and is fixedly connected to a support plate 20, a through groove is provided on the side wall of the annular shell 9, the support plate 20 is adapted to the through groove, and the through groove is slightly larger than the support plate 20 so that the support plate 20 can enter the annular shell 9 through the through groove. In the initial state, the support plate 20 is located on the lower side of the conduction block 6, a second spring 21 is sleeved on the side wall of the lifting rod 19, a cavity 23 is provided on the bottom surface of the positioning hole 22, and a lifting and resetting assembly is provided in the cavity 23.

[0057] The push plate 12 and the support plate 20 are both made of high temperature resistant insulating material, preferably ceramic.

[0058] Specifically, the elastic support assembly is used to support the conductive block 6 in the initial state. Since the elastic force of the second spring 21 is less than the elastic force of the first spring 11, when the conductive block 6 is pushed down to open the circuit, the second spring 21 is in a compressed state. During reset, since the high-temperature deformation rod 13 is disengaged from the socket 14, it is necessary to operate the lifting and reset assembly. While pushing up through the lifting rod 19, the rebound of the tension spring 16 facilitates the insertion of the high-temperature deformation rod 13 into the socket 14. At the same time, the conductive block 6 is between the conductive columns 5 on both sides, thereby realizing reset after the circuit is disconnected.

[0059] like Figure 3 and Figure 10 As shown, the lifting and resetting assembly includes a micromotor 24 fixedly mounted on the bottom surface of the cavity 23. The output end of the micromotor 24 is fixedly connected to a screw 25. A threaded sleeve 26 is threadedly connected to the side wall of the screw 25. A push rod 27 is fixedly connected to the side wall of the sleeve 26. The diameter of the push rod 27 is smaller than the diameter of the positioning hole 22, and the push rod 27 and the positioning hole 22 are coaxial. In the initial state, the push rod 27 is located at the bottom of the screw 25. A vertical rod 28 is fixedly connected to the side wall of the cavity 23, and the vertical rod 28 passes through the sleeve 26 and is movably connected to it.

[0060] Specifically, the micro motor 24 adopts a stepper motor with a lead screw, which is commonly used in mobile phones, digital products, etc. It has the characteristics of small size, fast response, and high stability. In this solution, it is used to provide an upward reset thrust for the support plate 20. Its structure and principle belong to existing mature technologies, so it will not be described in detail in this solution.

[0061] Example 3:

[0062] Based on Example 1, this example specifically illustrates a structure for intuitively judging the power-on state of the conductive pillar 5:

[0063] like Figure 3 As shown, the inner wall of the charging hole 8 is installed with an inspection light strip 4, and the inspection light strip 4 is ring-shaped.

[0064] Specifically, when the conductive posts 5 are in a normal state (not charged), the conductive posts 5 on both sides are in a connected state. At this time, the light strip 4 is checked to be in a constantly lit state.

[0065] When the user needs to charge, after taking out the charging gun, he can check the lighting of the light strip 4 to determine whether there are foreign objects in the charging hole 8 and whether there are impurities adhering to the conductive column 5. If there is an odor, he can clean it or contact maintenance personnel for maintenance, thereby reducing overheating problems caused by uneven contact or odor during charging.

[0066] When the user takes out the charging gun and finds that the inspection light strip 4 is off, it means that the charging gun is not powered. The reasons are as follows:

[0067] a. The last time the user was charging, an overload or overheating occurred, and the automatic power failure was not reset in time, resulting in the conductive column 5 not being energized;

[0068] b. The reset structure is aging, damaged, or has poor contact;

[0069] c. The charging pile circuit or system is faulty and charging is temporarily unavailable;

[0070] d. Temporary power outage.

[0071] Example 4:

[0072] Based on Example 1, this example specifically describes the structure for extinguishing the arc when the circuit is disconnected in this solution;

[0073] like Figure 8 As shown, a plurality of arc dispersion channels 29 are respectively provided on the side walls of the T-shaped slot 7 .

[0074] Specifically, after the conductive block 6 is disconnected from the conductive posts 5 on both sides, the arc generated when the circuit is disconnected is guided by the grooves into multiple dispersed channels. The increased arc length disperses the energy over a larger space, while the contact area with air is increased, accelerating arc extinguishing through air convection. This significantly reduces arc erosion on the contact surface of the conductive posts 5 (traditional planar disconnection is prone to concentrated arcing, causing metal meltdown).

[0075] The arc dispersion channel 29 can be set into a variety of shapes, such as arc, wave, etc. If the arc dispersion channel 29 is designed to have a specific geometric shape (such as sawtooth, maze), the arc will move along the path of the arc dispersion channel 29 under the action of the magnetic field, further consuming energy and shortening the arc duration (similar to the arc extinguishing grid principle).

[0076] This solution uses mechanically triggered protection and physical arc suppression to make up for the delay defects of traditional charging guns that rely on electronic detection, while improving reliability in high-power scenarios. It is suitable for high-current scenarios such as fast charging and supercharging, and has practical engineering value in reducing charging safety accidents and extending equipment life.

[0077] The working principle of the present invention is as follows: during assembly, the charging head 3 is fixed to the docking head 2 by bolts. At this time, the conductive block 6 is located in the annular shell 9, and the conductive columns 5 on both sides are not conductive. Then, the micro motor 24 is started by the controller, and the output shaft of the micro motor 24 drives the screw 25 to rotate. The screw 25 drives the screw sleeve 26 to move upward. The screw sleeve 26 pushes the lifting rod 19 upward through the push rod 27. The lifting rod 19 drives the support plate 20 to push the conductive block 6 upward into the T-slot 7.

[0078] Since the elastic force of the first spring 11 is greater than the elastic force of the second spring 21, the second spring 21 plays an auxiliary role in the process of the support plate 20 pushing the lifting rod 19 upward. When the conductive block 6 rises to a suitable position, the micro motor 24 drives the push rod 27 to reset through the screw sleeve 26;

[0079] At the same time, when the conducting block 6 moves upward, it pushes the push plate 12 and the ejector rod 10 to move upward, and at the same time the first spring 11 is compressed. During this process, the tension of the tension spring 16 is less than the elastic force of the first spring 11. Therefore, the tension spring 16 is in a stretched state, and the high-temperature deformation rod 13 is in a state of being out of the socket 14. The steel wire 15 is located in the socket 14. However, as the ejector rod 10 moves upward, the tension spring 16 slowly changes from a stretched state to a rebound reset state, thereby driving the high-temperature deformation rod 13 to be inserted into the socket 14, completing the docking of the charging head 3.

[0080] During the charging process, if the conductive column 5 and the car connector have poor contact or are not properly plugged in, the contact area between the conductive column 5 and the car connector will shrink, the resistance will increase, and the temperature of the conductive column 5 will rise. If the temperature of the conductive column 5 reaches the critical point of failure, the high-temperature deformation rod 13 will soften due to heat, thereby reducing the downward pressure resistance to the first spring 11. The first spring 11 can drive the push rod 10 downward through the elastic force, so that the high-temperature deformation rod 13 is disengaged from the socket 14. The elastic force of the first spring 11 is used to quickly push the conductive block 6 downward, so that the conductive block 6 enters the annular shell 9, and the connection between the conductive columns 5 on both sides is disconnected, thereby detecting faults in the charging circuit and quickly disconnecting it.

[0081] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A fault detection device for a car charging pile line, comprising a gun body (1), characterized in that: The end face of the gun body (1) is fixedly connected to a docking head (2), one side of the docking head (2) is equipped with a charging head (3), the end faces of the docking head (2) and the charging head (3) are respectively provided with a plurality of charging holes (8), and the docking head (2) and the charging head (3) are both provided with conductive columns (5); The conductive column (5) on the left side is electrically connected to the docking head (2), the inner wall of the charging head (3) is fixedly connected to an annular shell (9), and the conductive column (5) on the right side is fixedly connected to the annular shell (9); A conducting block (6) is movably connected between the two conducting posts (5) located on the same axis, a high-temperature circuit breaker assembly is provided on the upper side of the conducting post (5), and an elastic support assembly is provided on the lower side of the conducting block (6).

2. The fault detection device for a car charging pile line according to claim 1, characterized in that: The high-temperature circuit breaker assembly includes a push rod (10) movably connected to the inner wall of the annular shell (9) on the upper side, the bottom end of the push rod (10) passes through the annular shell (9) and is fixedly connected to a push plate (12), the push plate (12) is located on the upper side of the conduction block (6), the cross section of the push rod (10) is a T-shaped structure, the side wall of the push rod (10) is located in the inner cavity of the annular shell (9) and is provided with a first spring (11), and when the push rod (10) is in the initial state, the first spring (11) is in a compressed state; The left end surface of the conductive column (5) on the right side is provided with a temperature control component.

3. The fault detection device for a car charging pile line according to claim 2, characterized in that: The temperature control component includes a high-temperature deformation rod (13) fixedly connected to the left end face of the right conductive column (5); a socket (14) is provided on the side wall of the top rod (10); the high-temperature deformation rod (13) is plugged into the socket (14); the other end of the high-temperature deformation rod (13) is fixedly connected to a steel wire (15); the other end of the steel wire (15) is fixedly connected to a hanging ring (17); the inner wall of the annular shell (9) is fixedly connected to a tension spring (16); the hanging ring (17) is hung with the tension spring (16).

4. The fault detection device for a car charging pile line according to claim 3, characterized in that: A limiting groove (18) is provided on the side wall of the push rod (10), and the limiting groove (18) is connected to the insertion hole (14).

5. The fault detection device for automobile charging pile line collection according to claim 1, characterized in that: The end faces of opposite ends of the conductive pillars (5) are respectively provided with T-shaped slots (7); the cross section of the conductive block (6) is an I-shaped structure; the conductive block (6) is adapted to the T-shaped slots (7).

6. The fault detection device for a car charging pile line according to claim 1, characterized in that: The elastic support assembly includes a lifting rod (19) arranged in the annular shell (9), a positioning hole (22) is provided on the side wall of the charging hole (8), the lifting rod (19) is slidably connected to the positioning hole (22), the top end of the lifting rod (19) extends into the annular shell (9) and is fixedly connected to a support plate (20), the side wall of the annular shell (9) is provided with a through groove, the support plate (20) is adapted to the through groove, and in the initial state, the support plate (20) is located on the lower side of the conductive block (6), the side wall of the lifting rod (19) is sleeved with a second spring (21), the bottom surface of the positioning hole (22) is provided with a cavity (23), and a lifting and resetting assembly is provided in the cavity (23).

7. The fault detection device for automobile charging pile line collection according to claim 6, characterized in that: The lifting and resetting assembly comprises a micro motor (24) fixedly mounted on the bottom surface of the inner cavity of the cavity (23); the output end of the micro motor (24) is fixedly connected to a screw rod (25); the side wall of the screw rod (25) is threadedly connected to a screw sleeve (26); the side wall of the screw sleeve (26) is fixedly connected to a push rod (27); the diameter of the push rod (27) is smaller than the diameter of the positioning hole (22), and the push rod (27) and the positioning hole (22) are on the same central axis. In the initial state, the push rod (27) is located at the lowermost side of the screw rod (25).

8. The fault detection device for automobile charging pile line collection according to claim 7, characterized in that: The side wall of the cavity (23) is fixedly connected with a vertical rod (28), and the vertical rod (28) passes through the screw sleeve (26) and is movably connected thereto.

9. The fault detection device for automobile charging pile line collection according to claim 5, characterized in that: The side walls of the T-shaped slot (7) are respectively provided with a plurality of arc dispersion channels (29).

10. The fault detection device for automobile charging pile line collection according to claim 1, characterized in that: An inspection light strip (4) is installed on the inner wall of the charging hole (8), and the inspection light strip (4) is annular.

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