A testing device and testing steps for electric vehicle charging port insulation

Abstract

This invention relates to the field of electric vehicle charging port testing technology, specifically a testing device and testing procedures for the insulation of electric vehicle charging ports. The device includes a testing component, a support component threadedly connected to the lower end of the testing component, a connecting component inserted into one side of the testing component, an anti-interference component inserted into the other end of the connecting component, and a sealing component slidably engaged at the upper end of the testing component. The testing component facilitates the storage of the support component, connecting component, and anti-interference component. During use, the support component facilitates placement and grounding of the grounding wire, the connecting component adapts to different types of electric vehicle charging ports, the anti-interference component prevents external electromagnetic interference during connection, improving testing accuracy, and the sealing component facilitates operation of the insulation tester during use and improves sealing performance when not in use, preventing damage to the insulation tester, extending its service life, and providing convenience.

Description

Technical Field

[0001] This invention relates to an insulation testing device, specifically a testing device and testing procedures for the insulation of an electric vehicle charging port, belonging to the field of electric vehicle charging port testing technology. Background Technology

[0002] Electric vehicles (EVs) are vehicles powered by an onboard power source, driven by an electric motor, and that meet all road traffic and safety regulations. Due to their relatively smaller environmental impact compared to traditional vehicles, their prospects are widely considered promising. When using an EV, an external charger needs to be connected to the charging port to charge the onboard power source. Frequent plugging and unplugging of the charger during EV use can easily cause wear and tear on the charging port. Severe wear can affect the insulation performance of the charging port, not only affecting the lifespan of the EV but also posing a risk of leakage. Therefore, after prolonged use, an insulation test is necessary to check the insulation performance of the charging port. Currently, insulation testing involves connecting a testing device to the charging port, as illustrated in publication number CN215678622U. An electric vehicle on-site charging interface insulation testing device includes a charger, a charging connector, a data acquisition ring, and a leakage current collector. The charger is connected to the charging connector via a cable. The data acquisition ring consists of an inner conductor ring, an insulating ring, and an outer conductor ring, arranged sequentially from the inside out. The data acquisition ring is positioned on the outside of the charging connector. When the charging connector is inserted into the electric vehicle's charging interface, the inner conductor ring of the data acquisition ring contacts the insulating part of the charging interface, and the outer conductor ring contacts the vehicle body. By starting the charger in either a dry or humid environment, the leakage current collector can collect electrical signals from the insulating part of the charging interface and the vehicle body, thereby determining whether the charging interface is leaking current and assessing its insulation. This helps eliminate potential safety hazards. During use, the leakage current collector performs insulation tests on the charging port.

[0003] Some current devices also use insulation testers, which are connected to the charging port. However, to improve safety during use, some insulation testers require a ground wire connection, which makes wiring cumbersome and inconvenient. Furthermore, for some car models, it is inconvenient to connect and place the insulation tester. During testing, external electromagnetic interference can easily lead to test errors. When not in use, they are not easy to carry and have poor portability.

[0004] In view of this, the present invention is proposed, which is convenient to carry, facilitates testing of charging ports of different car models, is easy to place, and provides protection for the insulation tester when not in use, thereby improving its service life. Summary of the Invention

[0005] The purpose of this invention is to provide a testing device and testing procedure for the insulation of electric vehicle charging ports in order to solve the above-mentioned problems. It has the advantages of being easy to carry, convenient for testing charging ports of different models, easy to place, and easy to protect the insulation tester when not in use, thereby improving its service life.

[0006] This invention achieves the above-mentioned objectives through the following technical solution: a testing device and testing steps for the insulation of an electric vehicle charging port, comprising a testing component, a support component threadedly connected to the lower end of the testing component, a connecting component inserted into one side of the testing component, an anti-interference component inserted into the other end of the connecting component, and a sealing component slidably engaged at the upper end of the testing component. The support component, the connecting component, and the anti-interference component, after being stored, can be placed inside the testing component and sealed within it. In use, the testing component facilitates carrying the invention; during testing, the connecting component facilitates connection of the testing component to the vehicle's charging port; the support component facilitates placement; and the anti-interference component prevents external electromagnetic interference from affecting the test results. When not in use, the support component, the connecting component, and the anti-interference component can be stored for easy carrying.

[0007] Furthermore, the test assembly includes an explosion-proof box, and the support assembly is threadedly connected to the lower middle position of the explosion-proof box. The connecting assembly is inserted into one side of the explosion-proof box. An insulation tester is fixedly installed on one side of the explosion-proof box, directly below the sealing assembly. Placement slots are evenly distributed on the other side of the explosion-proof box. When stored, the support assembly, the connecting assembly, and the anti-interference assembly are placed inside the placement slots of the explosion-proof box. A cover plate is hinged to the upper end of the explosion-proof box, and the sealing assembly is located on the cover plate. Locks are evenly fixedly installed on the upper outer side of the explosion-proof box, and the explosion-proof box and the cover plate are fixedly connected by the locks. Placement pads are evenly fixedly installed at the four corners of the lower surface of the explosion-proof box. A connecting plate with a threaded opening is fixedly installed in the middle of the explosion-proof box. The connecting plate is electrically connected to the grounding terminal of the insulation tester, and the height of the connecting plate is less than the height of the placement pad. The support assembly is threadedly connected to the connecting plate. A connection port is fixedly installed on one side of the explosion-proof box, and the connecting assembly is inserted into the connection port. The connecting assembly is electrically connected to the insulation tester through the connection port. Sealing gaskets are embedded in the outer side of the upper surface of the explosion-proof box, and the lower surface of the cover plate is pressed against the sealing gaskets. A handle is fixedly installed in the middle of the upper surface of the cover plate. The explosion-proof box and the cover plate facilitate carrying and storage of the support assembly, the connecting assembly, and the anti-interference assembly.

[0008] Furthermore, the support assembly includes a tripod, and a threaded rod is fixedly installed on the upper surface of the tripod. The threaded rod is threadedly connected to the connecting plate, and a grounding plate is fixedly installed at the lower end of the tripod. The tripod, the threaded rod, and the grounding plate are all made of conductive material. The tripod facilitates the placement of the test component and allows for grounding during placement, thereby improving safety during use.

[0009] Furthermore, the connecting assembly includes a cable, and a connector is fixedly installed at one end of the cable. The connecting assembly is inserted into the connector port through the connector. A fixing plate is fixedly installed at the other end of the cable. A rod is fixedly installed on one side of the fixing plate, and the anti-interference assembly is sleeved on the rod. A first electrode plate is uniformly fixedly installed at one end of the rod. The first electrode plate is electrically connected to the cable. A matching end is snapped into one end of the rod. A second electrode plate is uniformly fixedly installed on one side of the matching end. The first electrode plate and the second electrode plate are pressed together. The matching end is located inside the anti-interference assembly. One end of the rod is fixedly installed... A limiting plate is installed, and elastic sheets are evenly fixedly installed on one side of the limiting plate. A contact plate is fixedly installed on one end of the matching end, and snap-fit ​​holes are evenly opened on the contact plate. The elastic sheets snap into the snap-fit ​​holes, and a limiting ring is fixedly installed on one side of the contact plate. The second electrode sheet is located inside the limiting ring, and the limiting ring is sleeved on one end of the rod. A handle is fixedly installed in the middle of the other side of the fixing plate. The matching end facilitates testing of different types of car charging ports, and the elastic sheets facilitate the connection between the matching end and the rod. The first and second electrode sheets facilitate the connection between the matching end and the insulation tester.

[0010] Furthermore, the anti-interference component includes a covering tube, with guide blocks fixedly installed on both sides of one end of the covering tube. Guide grooves are provided on both sides of the outer side of the rod body. The covering tube is slidably engaged with the guide blocks inside the guide grooves. An anti-interference ring is fixedly installed inside the covering tube. A clamping pad is fixedly installed on one end of the covering tube, and guide rods are uniformly fixedly installed on the other side of the covering tube. A guide hole is provided on the fixing plate, and the guide rod is inserted into the guide hole. A spring is sleeved on the guide rod, and the spring is pressed between the covering tube and the fixing plate. Through the covering tube and the anti-interference ring, it is convenient to cover the connection position, improve the anti-interference effect, and avoid the influence of external electromagnetic fields on the test results.

[0011] Furthermore, the sealing assembly includes a sealing plate, and a through hole is provided on the cover plate directly above the insulation tester. A cavity is provided inside the cover plate on one side of the through hole, and sliding grooves are provided on both sides of the cavity and the through hole. The sealing plate is slidably engaged with the sliding grooves inside the cavity and the through hole, and the sealing plate seals the through hole. The through hole has a T-shaped structure, and an airbag ring is fixedly installed at the upper end of the through hole. One side of the sealing plate is pressed against the airbag ring. Through the sealing plate, the insulation tester is easily protected when not in use, and when in use, the sealing plate moves into the cavity to facilitate operation of the insulation tester, making it convenient to use.

[0012] During testing, the test component is carried to the area to be tested using the handle. The support component and the connecting component are removed from the test component and connected to it. The cover is closed, and the sealing plate is pushed into the cavity, exposing the insulation tester through the through-hole. The matching terminal that matches the external charging port is selected and inserted into the charging port to be tested. The handle is used to press the rod onto the matching terminal, so that the tester... The first electrode plate and the second electrode plate are pressed together, and during pressing, the elastic plate is engaged inside the engagement hole, so that the matching end is electrically connected to the insulation tester through the first electrode plate, the second electrode plate and the cable. The insulation tester is used to test the insulation performance of the charging port. When a grounding wire is required, it is connected to the ground through the support assembly. During the test, the anti-interference assembly is pressed against the vehicle body, covering one end of the rod and the matching end, thereby avoiding external electromagnetic interference during the test and improving the test accuracy.

[0013] The technical effects and advantages of this invention are as follows: When in use, the testing components facilitate the storage and portability of the support, connection, and anti-interference components. The support components facilitate placement and grounding of the grounding wire, while the connection components adapt to different types of electric vehicle charging ports, enabling convenient insulation testing. The anti-interference components prevent external electromagnetic interference during connection, improving test accuracy. The sealing components facilitate operation of the insulation tester during use and improve sealing performance when not in use, preventing damage and extending service life, thus enhancing usability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle when the cover is opened;

[0016] Figure 3 This is a schematic diagram of the explosion-proof box in this invention;

[0017] Figure 4 This is a partial structural diagram of the cover plate in this invention;

[0018] Figure 5 This is a schematic diagram of the supporting component in this invention;

[0019] Figure 6 This is a schematic diagram of the cable structure in this invention;

[0020] Figure 7 This is a schematic diagram of the matching end in this invention;

[0021] Figure 8 This is a partial structural diagram of the anti-interference component in this invention.

[0022] In the diagram: 1. Test assembly; 11. Explosion-proof box; 12. Insulation tester; 13. Placement slot; 14. Cover plate; 15. Lock; 16. Placement pad; 17. Connecting plate; 18. Connection port; 19. Sealing gasket; 110. Handle;

[0023] 2. Support components; 21. Tripod; 22. Threaded rod; 23. Grounding plate;

[0024] 3. Connecting assembly; 31. Cable; 32. Connector; 33. Fixing plate; 34. Rod; 35. First electrode plate; 36. Matching end; 37. Second electrode plate; 38. Limiting plate; 39. Elastic plate; 310. Contact plate; 311. Snap-fit ​​hole; 312. Limiting ring; 313. Handle;

[0025] 4. Anti-interference component; 41. Covering tube; 42. Guide block; 43. Guide groove; 44. Anti-interference ring; 45. Compression pad; 46. Guide rod; 47. Guide hole; 48. Spring;

[0026] 5. Sealing assembly; 51. Sealing plate; 52. Through hole; 53. Cavity; 54. Slide groove; 55. Airbag ring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-8 As shown, a testing device and testing steps for the insulation of an electric vehicle charging port include a testing component 1. A support component 2 is threadedly connected to the lower end of the testing component 1, and a connecting component 3 is inserted into one side of the testing component 1. An anti-interference component 4 is inserted into the other end of the connecting component 3, and a sealing component 5 is slidably engaged with the upper end of the testing component 1. The support component 2, connecting component 3, and anti-interference component 4 can be stored inside the testing component 1 and sealed within it. During use, the testing component 1 facilitates carrying the invention. During testing, the connecting component 3 facilitates connection of the testing component 1 to the vehicle's charging port, the support component 2 facilitates placement, and the anti-interference component 4 prevents external electromagnetic interference from affecting the test results. When not in use, the support component 2, connecting component 3, and anti-interference component 4 can be stored for easy carrying.

[0029] Test component 1 includes an explosion-proof box 11, and a support component 2 is threadedly connected to the lower middle position of the explosion-proof box 11. A connecting component 3 is inserted into one side of the explosion-proof box 11. An insulation tester 12 is fixedly installed inside the explosion-proof box 11, directly below the sealing component 5. Placement slots 13 are evenly distributed inside the other side of the explosion-proof box 11. The support component 2, connecting component 3, and anti-interference component 4 are placed inside the placement slots 13 inside the explosion-proof box 11 during storage. A cover plate 14 is hinged to the upper end of the explosion-proof box 11, and the sealing component 5 is located on the cover plate 14. Locking buckles 15 are evenly fixedly installed on the upper outer side of the explosion-proof box 11, and the explosion-proof box 11 and the cover plate 14 are fixedly connected by the locking buckles 15. Placement pads 16 are evenly fixedly installed at the four corners of the lower surface of the explosion-proof box 11, and a threaded opening is fixedly installed in the middle of the explosion-proof box 11. The connecting plate 17 is electrically connected to the grounding terminal of the insulation tester 12, and the height of the connecting plate 17 is less than the height of the placement pad 16. The support component 2 is threaded onto the connecting plate 17. A connection port 18 is fixedly installed on one side of the explosion-proof box 11. The connecting component 3 is inserted into the connection port 18 and is electrically connected to the insulation tester 12 through the connection port 18. Sealing gaskets 19 are embedded on the outer side of the upper surface of the explosion-proof box 11, and the lower surface of the cover plate 14 is pressed against the sealing gaskets 19. A handle 110 is fixedly installed in the middle of the upper surface of the cover plate 14. When in use, the insulation tester 12 can be placed through the explosion-proof box 11 and the cover plate 14. When stored, the support component 2, the connecting component 3, and the anti-interference component 4 can be stored through the placement slot 13. The handle 110 can be used to carry the device for easy use.

[0030] The support assembly 2 includes a tripod 21, and a threaded rod 22 is fixedly installed on the upper surface of the tripod 21. The threaded rod 22 is threadedly connected to the connecting plate 17, and a grounding plate 23 is fixedly installed on the lower end of the tripod 21. The tripod 21, the threaded rod 22 and the grounding plate 23 are all made of conductive material. The tripod 21 facilitates the support of the test assembly 1 during use and makes it easy to place. The grounding plate 23 ensures that the insulation tester 12 contacts the ground during placement, completing the grounding operation and improving safety during use.

[0031] The connecting component 3 includes a cable 31, with a connector 32 fixedly installed at one end of the cable 31. The connecting component 3 is inserted into the connector 18 via the connector 32. A fixing plate 33 is fixedly installed at the other end of the cable 31. A rod 34 is fixedly installed on one side of the fixing plate 33, and an anti-interference component 4 is sleeved on the rod 34. A first electrode plate 35 is uniformly fixedly installed at one end of the rod 34, and the first electrode plate 35 is electrically connected to the cable 31. A matching end 36 is snapped onto one end of the rod 34, and a second electrode plate 37 is uniformly fixedly installed on one side of the matching end 36. The first electrode plate 35 and the second electrode plate 37 are pressed together. The matching end 36 is located inside the anti-interference component 4. A limiting plate 38 is fixedly installed at one end of the rod 34, and a limiting plate 38 is fixedly installed on one side of the limiting plate 38. Elastic sheets 39 are uniformly fixedly installed. A contact plate 310 is fixedly installed at one end of the matching end 36, and the contact plate 310 is uniformly provided with snap-fit ​​holes 311. The elastic sheets 39 are snapped into the snap-fit ​​holes 311. A limit ring 312 is fixedly installed on one side of the contact plate 310. The second electrode sheet 37 is located inside the limit ring 312, and the limit ring 312 is sleeved on one end of the rod body 34. A handle 313 is fixedly installed in the middle of the other side of the fixing plate 33. When in use, the matching end 36 is used to connect to different types of car charging ports. The elastic sheets 39 facilitate the connection between the rod body 34 and the matching end 36, thereby facilitating the connection between the car charging port and the insulation tester 12 and improving the ease of operation during connection.

[0032] The anti-interference component 4 includes a covering tube 41, with guide blocks 42 fixedly installed on both sides of one end of the covering tube 41. Guide grooves 43 are provided on both sides of the outer side of the rod body 34. The covering tube 41 is slidably engaged with the inside of the guide grooves 43 through the guide blocks 42. An anti-interference ring 44 is fixedly installed inside the covering tube 41. A clamping pad 45 is fixedly installed on one end of the covering tube 41, and guide rods 46 are evenly fixedly installed on the other side of the covering tube 41. A guide hole 47 is provided on the fixing plate 33. The guide rod 46 is inserted into the inside of the guide hole 47, and a spring 48 is sleeved on the guide rod 46. The spring 48 is pressed between the covering tube 41 and the fixing plate 33. During testing, the connection position between the connecting component 3 and the car charging port is covered inside the covering tube 41, and the anti-interference ring 44 improves the anti-interference performance of the connection position, avoiding the influence of external electromagnetic fields on the test results.

[0033] The sealing assembly 5 includes a sealing plate 51, and a through hole 52 is provided on the cover plate 14 directly above the insulation tester 12. A cavity 53 is provided inside the cover plate 14 on one side of the through hole 52, and grooves 54 are provided on both sides of the cavity 53 and the through hole 52. The sealing plate 51 is slidably engaged with the grooves 54 inside the cavity 53 and the through hole 52, and the sealing plate 51 seals the through hole 52. The through hole 52 has a T-shaped structure, and an airbag ring 55 is fixedly installed at the upper end of the through hole 52. One side of the sealing plate 51 is pressed against the airbag ring 55. When in use, the sealing plate 51 is pushed into the cavity 53 to facilitate the operation of the insulation tester 12. When not in use, the sealing plate 51 covers the through hole 52 to protect the insulation tester 12, and the airbag ring 55 improves the sealing effect during sealing.

[0034] Using the handle 110, carry the test assembly 1 to the area to be tested, remove the support assembly 2 and the connecting assembly 3 from the test assembly 1 and connect them to the test assembly 1, close the cover 14, and push the sealing plate 51 so that the sealing plate 51 enters the cavity 53, thereby exposing the insulation tester 12 through the through hole 52. Select the matching terminal 36 that matches the external charging port and insert the matching terminal 36 into the charging port to be tested. Using the handle 313, press the rod 34 firmly onto the matching terminal 36, so that the first electrode plate 35 and the second electrode plate 36 are connected. The electrode plates 37 are pressed together, and during the pressing, the elastic plate 39 is engaged inside the engagement hole 311, so that the matching end 36 is electrically connected to the insulation tester 12 through the first electrode plate 35, the second electrode plate 37 and the cable 31. The insulation performance of the charging port is tested by the insulation tester 12. When a grounding wire is required, it is connected to the ground through the support component 2. During the test, the anti-interference component 4 is pressed against the vehicle body to cover one end of the rod 34 and the matching end 36, thereby avoiding interference from external electromagnetic fields during the test and improving the test accuracy.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A testing device for the insulation of an electric vehicle charging port, comprising a testing component (1), characterized in that: The lower end of the test component (1) is threadedly connected to a support component (2), and a connection component (3) is inserted into one side of the test component (1). An anti-interference component (4) is inserted into the other end of the connection component (3), and a sealing component (5) is slidably snapped into the upper end of the test component (1). After being stored, the support component (2), the connection component (3) and the anti-interference component (4) can be placed inside the test component (1) and sealed inside the test component (1). The test assembly (1) includes an explosion-proof box (11); an insulation tester (12) is fixedly installed on one side of the explosion-proof box (11) directly below the sealing assembly (5); a connection port (18) is fixedly installed on one side of the explosion-proof box (11), and the connection assembly (3) is inserted into the connection port (18), and the connection assembly (3) is electrically connected to the insulation tester (12) through the connection port (18); The connecting component (3) includes a cable (31), and a connector (32) is fixedly installed at one end of the cable (31). The connecting component (3) is inserted into the connector (18) through the connector (32). A fixing plate (33) is fixedly installed at the other end of the cable (31). A rod (34) is fixedly installed on one side of the fixing plate (33). The anti-interference component (4) is sleeved on the rod (34). A first electrode plate (35) is uniformly fixedly installed at one end of the rod (34). The first electrode plate (35) is electrically connected to the cable (31). A matching end (36) is snapped into one end of the rod (34). A second electrode plate (37) is uniformly fixedly installed on one side of the matching end (36). The first electrode plate (35) and the second electrode plate (37) are pressed together. The matching end (36) is located inside the anti-interference component (4). The anti-interference component (4) includes a covering tube (41), and guide blocks (42) are fixedly installed on both sides of one end of the covering tube (41). Guide grooves (43) are opened on both sides of the outside of the rod (34). The covering tube (41) is slidably engaged with the inside of the guide groove (43) through the guide block (42), and an anti-interference ring (44) is fixedly installed inside the covering tube (41).

2. The testing device for the insulation of an electric vehicle charging port according to claim 1, characterized in that: The support component (2) is threaded to the middle of the lower end of the explosion-proof box (11). The connecting component (3) is inserted into one side of the explosion-proof box (11). The other side of the explosion-proof box (11) is evenly provided with placement slots (13). When the support component (2), the connecting component (3) and the anti-interference component (4) are stored, they are placed inside the placement slots (13) inside the explosion-proof box (11). The upper end of the explosion-proof box (11) is hinged with a cover plate (14). The sealing component (5) is located on the cover plate (14). The upper outer side of the explosion-proof box (11) is evenly fixed with buckles (15). The explosion-proof box (11) and the cover plate (14) are fixedly connected by the buckles (15).

3. The testing device for the insulation of an electric vehicle charging port according to claim 2, characterized in that: The explosion-proof box (11) has four corners of the lower surface of the box evenly fixed with a placement pad (16), and the explosion-proof box (11) has a connecting plate (17) with a threaded opening in the middle fixed at the middle position. The connecting plate (17) is electrically connected to the grounding terminal of the insulation tester (12), and the height of the connecting plate (17) is less than the height of the placement pad (16). The support component (2) is threadedly connected to the connecting plate (17). The outer side of the upper surface of the explosion-proof box (11) is inlaid with a sealing gasket (19), and the lower surface of the cover plate (14) is pressed against the sealing gasket (19). The upper surface of the cover plate (14) is fixedly installed with a handle (110) in the middle position.

4. The testing device for the insulation of an electric vehicle charging port according to claim 3, characterized in that: The support assembly (2) includes a tripod (21), and a threaded rod (22) is fixedly installed on the upper surface of the tripod (21). The threaded rod (22) is threadedly connected to the connecting plate (17), and a ground plate (23) is fixedly installed at the lower end of the tripod (21). The tripod (21), the threaded rod (22) and the ground plate (23) are all made of conductive material.

5. The testing device for the insulation of an electric vehicle charging port according to claim 4, characterized in that: One end of the rod (34) is fixedly installed with a limiting plate (38), and an elastic sheet (39) is evenly fixedly installed on one side of the limiting plate (38). One end of the matching end (36) is fixedly installed with a contact plate (310), and a snap-fit ​​hole (311) is evenly opened on the contact plate (310). The elastic sheet (39) is snapped into the inside of the snap-fit ​​hole (311), and a limiting ring (312) is fixedly installed on one side of the contact plate (310). The second electrode sheet (37) is located inside the limiting ring (312), and the limiting ring (312) is sleeved on one end of the rod (34). A handle (313) is fixedly installed in the middle position on the other side of the fixing plate (33).

6. The testing device for the insulation of an electric vehicle charging port according to claim 5, characterized in that: One end of the covering tube (41) is fixedly installed with a pressure pad (45), and a guide rod (46) is evenly fixedly installed on the other side of the covering tube (41). A guide hole (47) is opened on the fixing plate (33). The guide rod (46) is inserted into the guide hole (47), and a spring (48) is sleeved on the guide rod (46). The spring (48) is pressed between the covering tube (41) and the fixing plate (33).

7. The testing device for the insulation of an electric vehicle charging port according to claim 6, characterized in that: The sealing assembly (5) includes a sealing plate (51), and a through hole (52) is provided on the cover plate (14) directly above the insulation tester (12). A cavity (53) is provided on one side of the through hole (52) on the cover plate (14), and a sliding groove (54) is provided on both sides of the cavity (53) and the through hole (52). The sealing plate (51) is slidably engaged with the sliding groove (54) inside the cavity (53) and the through hole (52), and the sealing plate (51) seals the through hole (52).

8. The testing device for the insulation of an electric vehicle charging port according to claim 7, characterized in that: The through hole (52) has a T-shaped structure, and an airbag ring (55) is fixedly installed at the upper end of the inside of the through hole (52). One side of the sealing plate (51) is pressed against the airbag ring (55).

9. A test procedure for the insulation of an electric vehicle charging port, comprising the test apparatus for the insulation of an electric vehicle charging port according to claim 7 or 8, characterized in that: The testing process includes the following steps: Step 1: Using the handle (110), carry the test component (1) to the area to be tested, and take out the support component (2) and the connecting component (3) from the test component (1) and connect them to the test component (1); Step 2: Close the cover plate (14) and push the sealing plate (51) so that the sealing plate (51) enters the cavity (53) and the insulation tester (12) is exposed through the through hole (52); Step 3: Select the matching terminal (36) that matches the external charging port, and plug the matching terminal (36) into the charging port that needs to be tested; Step 4: Press the rod (34) onto the matching end (36) using the handle (313), so that the first electrode plate (35) and the second electrode plate (37) are pressed together. When pressing, the elastic plate (39) is engaged inside the snap-fit ​​hole (311), so that the matching end (36) is electrically connected to the insulation tester (12) through the first electrode plate (35), the second electrode plate (37) and the cable (31). Step 5: Test the insulation performance of the charging port using the insulation tester (12). When a grounding wire is required, connect it to the ground using the support assembly (2). Step six: During the test, the anti-interference component (4) is pressed against the vehicle body to cover one end of the rod (34) and the matching end (36), thereby avoiding interference from external electromagnetic fields during the test and improving the test accuracy.

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