Gun head line detection device
By designing a charging gun circuit detection device and utilizing micro-resistance testing and insulation resistance testing, the accuracy and integrity issues of charging gun circuit detection were solved, automated testing was achieved, and production efficiency and safety were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO HENGDA GAO ELECTRONIC COMMERCE DEV CO LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-04-28
AI Technical Summary
During the production of charging guns, existing technologies struggle to effectively detect the accuracy and integrity of the wiring in the gun head, especially for European standard dual-head charging guns and charging guns with one gun head and one loose wire.
A gun-head circuit testing device was designed, comprising a frame, first and second connectors, a micro resistance tester, a safety tester, a control system, a high-voltage relay module, and an industrial control computer. The device ensures the correctness and integrity of the circuit wiring through micro resistance testing and insulation resistance testing, and realizes the switching of testing modes and data storage through the high-voltage relay module and the industrial control computer.
It enables automated testing of the accuracy and integrity of the charging gun circuitry, improving production efficiency and ensuring the safety and performance of the charging gun.
Smart Images
Figure CN224176656U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing device technology, specifically to a gun head circuit testing device. Background Technology
[0002] With the rapid growth of the electric vehicle market, the construction of charging infrastructure is also progressing rapidly. As a crucial piece of equipment in the electric vehicle charging process, the performance of the charging gun directly affects charging efficiency and safety.
[0003] A European standard dual-ended charging gun is a charging gun with charging heads at both ends. Each head contains a live wire, a neutral wire, and a ground wire. During the production process of a European standard dual-ended charging gun, each wire on both ends needs to be tested to ensure accurate wiring and that there are no incorrect connections. Additionally, each wire must be checked for damage. Besides the dual-ended charging gun mentioned above, there is also a charging gun with a charging head on one end and loose wires on the other; these also require the same testing of each wire. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a gun head circuit detection device to solve the technical problem of needing to detect the gun head circuit during the production process of charging guns.
[0005] To solve the above-mentioned technical problems, this utility model provides a gun head circuit detection device, comprising:
[0006] frame;
[0007] The first connector is connected to the frame and has at least two first sockets for connecting to the gun head;
[0008] Micro resistance tester, connected to the rack;
[0009] Safety testing equipment, connected to the rack;
[0010] The control system is electrically connected to all first sockets, micro resistance testers, and safety testers.
[0011] With the above structure, the gun head circuit testing device of this utility model has the following advantages: When testing the circuit of the European standard double-head gun, the gun heads at both ends are inserted into the two first sockets respectively. The control system selects a micro resistance tester to perform micro resistance testing on each circuit. If the resistance value of the line is less than the set value, it indicates that the wiring is correct. If it is greater than the set value, it indicates that the wiring is incorrect. Then, the control system selects a safety tester to perform insulation resistance testing on each circuit. If the insulation resistance is greater than the set value, it indicates that the circuit is not damaged. If the insulation resistance is less than the set value, it indicates that the circuit is damaged.
[0012] As an improvement, a second connector is also connected to the frame, and a second socket for connecting to the loose wire is connected to the second connector. The second socket is electrically connected to the control system. With this structure, for a charging gun with a gun head at one end and a loose wire at the other end, during testing, the gun head is inserted into the first socket and the loose wire is inserted into the second socket, thereby expanding the testing objects of this utility model.
[0013] As an improvement, the control system includes a high-voltage relay module, and all first sockets, micro resistance testers, and safety testers are electrically connected to the high-voltage relay module. With this structure, the high-voltage relay module serves as the execution unit in the control system, enabling the control switching of different detection lines and different detection data.
[0014] As an improvement, the control system also includes an industrial computer connected to the rack. The industrial computer is electrically connected to the high-voltage relay module, the micro resistance tester, and the safety tester. With this structure, the industrial computer acts as the main control unit and stores the test results.
[0015] As an improvement, a boom is connected to the frame, and a display is connected to the boom. The display is electrically connected to the control system. With this structure, the display is used to show the test data and test results.
[0016] As an improvement, the frame is equipped with a partition that divides the frame into an upper space and a lower space. The upper space is an open structure, in which the first connector, micro-resistance tester, and safety tester are all located. The lower space is a circumferentially enclosed structure. With this structure, the first connector, micro-resistance tester, and safety tester are all located in the open upper space, which facilitates the plugging and unplugging of the charging gun to be tested. The enclosed lower space can accommodate other electrical accessories, making the overall equipment more concise.
[0017] As an improvement, a door corresponding to the lower space is rotatably connected to the frame; this structure makes it easy to open or close the lower space.
[0018] As an improvement, several casters are connected to the bottom of the frame; this structure facilitates the movement of the frame. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0020] Figure 2 This is a three-dimensional structural diagram of the present invention (behind the hidden door).
[0021] Figure 3 This is a schematic diagram of the micro resistance tester in this utility model.
[0022] Figure 4 This is a schematic diagram of the testing principle of the safety testing instrument in this utility model.
[0023] Reference numerals: 1. Frame; 11. Upper space; 12. Lower space; 2. First connecting seat; 3. First socket; 4. Second connecting seat; 5. Second socket; 6. Hoist; 7. Display; 8. Partition; 9. Door; 10. Caster wheel; 20. High voltage relay module; 21. Micro resistance tester; 22. Safety tester. Detailed Implementation
[0024] The following is a detailed description of a gun head circuit detection device according to the present invention, with reference to the accompanying drawings.
[0025] like Figures 1 to 2 As shown, a gun head circuit testing device includes: a frame 1, a first connecting seat 2, a micro resistance tester 21, a safety tester 22, and a control system. The frame 1 is provided with a partition 8, which divides the frame 1 into an upper space 11 and a lower space 12. The upper space 11 is an open structure, and the lower space 12 is a circumferentially closed structure. Specifically, the frame 1 is a frame structure, and the upper space 11 is provided with a baffle on the rear side, and is open on the left, right, and front sides. The lower space 12 is provided with baffles on the left, right, and rear sides, and a door 9 is provided on the front side. That is to say, the frame 1 is rotatably connected to the door 9 corresponding to the lower space 12.
[0026] like Figure 1 and Figure 2 As shown, several casters 10 are connected to the bottom of the frame 1.
[0027] like Figure 1 and Figure 2 As shown, the first connecting seat 2 is connected to the frame 1 and has at least two first sockets 3 for connecting to the gun head. The micro resistance tester 21 and the safety tester 22 are both connected to the frame 1. Specifically, the first connecting seat 2, the micro resistance tester 21, and the safety tester 22 are all connected to the upper surface of the partition 8, so that the first connecting seat 2, the micro resistance tester 21, and the safety tester 22 are all located in the upper space 11.
[0028] In addition, a second connector 4 is connected to the rack 1, and a second socket 5 for connecting to the loose wire is connected to the second connector 4. The second connector 4 is also connected to the upper surface of the partition 8 and is located in the upper space 11.
[0029] In this embodiment, four first sockets 3 are provided on the first connector 2, while six second sockets 5 are provided on the second connector 4.
[0030] The control system is electrically connected to all first sockets 3, all second sockets 5, micro resistance tester 21, and safety tester 22.
[0031] The control system includes a high-voltage relay module 20 and an industrial computer connected to the rack 1. The high-voltage relay module 20 is also connected to the rack 1. All first sockets 3, all second sockets 5, micro resistance tester 21, and safety tester 22 are electrically connected to the high-voltage relay module 20 and the industrial computer.
[0032] like Figure 1 and Figure 2 As shown, a boom 6 is connected to the frame 1, and a display 7 is connected to the boom 6. The display 7 is electrically connected to the control system.
[0033] When testing the wiring of a European standard dual-head charging gun, insert the two ends of the gun head into the two first sockets 3 respectively. When testing the wiring of a charging gun with one end of the gun head and the other end of the loose wire, insert the gun head into the first socket 3 and the loose wire into the second socket 5. The control system selects the micro-resistance tester 21 to perform micro-resistance testing on each line. If the resistance value of the line is less than the set value, it indicates that the wiring is correct; if it is greater than the set value, it indicates that the wiring is incorrect. Then, the control system selects the safety tester 22 to perform insulation resistance testing on each line. If the insulation resistance is greater than the set value, it indicates that the line is not damaged; if the insulation resistance is less than the set value, it indicates that the line is damaged.
[0034] The industrial control computer acts as the main control unit, communicating with the PLC via the OPC protocol to form a hierarchical control architecture. The PLC is responsible for receiving instructions from the industrial control computer and driving the high-voltage relay module 20 through the I / O module. The high-voltage relay module 20 acts as the execution unit, directly controlling the switching of the detection modes of the two ends of the test head or the test head and the loose wire. The safety tester 22 and the micro resistance tester 21 are connected to the industrial control computer via RS232 communication to transmit test result data.
[0035] In this embodiment, the line resistance is set to 200 milliohms, and a voltage of 2000V is applied during the insulation resistance test, with the insulation resistance set to 10 megohms. Figure 3 and Figure 4 The diagrams shown are the test principle diagrams of the micro resistance tester 21 and the safety tester 22, respectively. The mode and phase line are switched through the high voltage relay module 20, and the withstand voltage of its contacts can reach up to about 10,000VDC.
[0036] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
Claims
1. A gun head circuit detection device, characterized in that, include: Rack (1); The first connecting seat (2) is connected to the frame (1) and has at least two first sockets (3) for connecting to the gun head. A micro resistance tester (21) is connected to the frame (1). Safety testing instrument (22) is connected to the frame (1); The control system is electrically connected to all the first sockets (3), the micro resistance tester (21), and the safety tester (22).
2. The gun head circuit detection device according to claim 1, characterized in that, The frame (1) is also connected to a second connector (4), and the second connector (4) is connected to a second socket (5) for connecting to the loose wire. The second socket (5) is electrically connected to the control system.
3. The gun head circuit detection device according to claim 1, characterized in that, The control system includes a high-voltage relay module (20), and all the first sockets (3), the micro resistance tester (21), and the safety tester (22) are electrically connected to the high-voltage relay module (20).
4. The gun head circuit detection device according to claim 3, characterized in that, The control system also includes an industrial computer connected to the rack (1), which is electrically connected to the high voltage relay module (20), the micro resistance tester (21), and the safety tester (22).
5. The gun head circuit detection device according to claim 1, characterized in that, A boom (6) is connected to the frame (1), and a display (7) is connected to the boom (6). The display (7) is electrically connected to the control system.
6. The gun head circuit detection device according to claim 1, characterized in that, The frame (1) is provided with a partition (8), which divides the frame (1) into an upper space (11) and a lower space (12). The upper space (11) is an open structure, and the first connecting seat (2), the micro resistance tester (21), and the safety tester (22) are all located in the upper space (11). The lower space (12) is a circumferentially closed structure.
7. The gun head circuit detection device according to claim 6, characterized in that, The frame (1) is rotatably connected to a door (9) corresponding to the lower space (12).
8. The gun head circuit detection device according to claim 1, characterized in that, The bottom of the frame (1) is connected to several casters (10).