Charging gun temperature rise test device

Abstract

The application relates to the technical field of charging gun testing equipment, in particular to a charging gun temperature rise testing device. The device comprises a box body, a vehicle-shaped socket is mounted on the box body and connected with a charging gun, the vehicle-shaped socket comprises a seat body, socket terminals are mounted on the seat body and connected with DC terminals of the charging gun, copper sheets are connected with the socket terminals, heating rods are mounted on the socket terminals for heating, a temperature sensor is detachably mounted on the box body, the temperature sensor comprises a thermocouple for detecting temperature, guide holes are formed in the seat body and used for inserting the thermocouple, second through holes are formed in the socket terminals, fourth through holes are formed in the side wall of one end of the vehicle-shaped socket into which the charging gun is inserted, and the thermocouple is abutted on the DC terminals after being inserted into the guide holes, the fourth through holes and the second through holes in sequence. The application has the effect of improving the accuracy of the charging gun temperature rise testing device in the testing process.

Description

Technical Field

[0001] This application relates to the field of charging gun testing equipment technology, and in particular to a charging gun temperature rise testing device. Background Technology

[0002] To ensure safety during the charging process of new energy vehicles, the charging guns for new energy vehicles are required to trigger an overheat protection mechanism to automatically cut off power when the temperature of the charging gun exceeds 90℃. However, due to assembly errors and other reasons during the production and assembly of the DC terminals, the temperature sensor inside each charging gun will generally have reading deviations and cannot accurately reflect the temperature of the area where the charging gun and the socket are connected. For example, when the temperature at the contact point between the DC terminal and the vehicle socket is greater than 90℃, the temperature sensor inside the charging gun may not detect a temperature of 90℃ due to differences in the thermal conductivity of the terminals or the temperature sensing characteristics of the sensor. In order to verify whether the charging guns of the same batch can achieve automatic power-off at this temperature protection value, it is necessary to sample the charging guns produced in the same batch for temperature rise testing. Utility Model Content

[0003] To improve the accuracy of the charging gun temperature rise testing device during the testing process, this application provides a charging gun temperature rise testing device.

[0004] This application provides a charging gun temperature rise testing device, which adopts the following technical solution: A charging gun temperature rise testing device includes a housing with a vehicle sample socket for connecting to the charging gun installed on the housing. The vehicle sample socket includes a base with a socket terminal connected to the DC terminal of the charging gun. A copper sheet is connected to the socket terminal, and a heating rod for heating is installed on the socket terminal. A temperature sensor, including a thermocouple for detecting temperature, is detachably installed on the housing. A guide hole for inserting the thermocouple is provided on the base, and a second through hole is provided on the socket terminal. A fourth through hole is provided on the side wall of the end where the charging gun is inserted into the vehicle sample socket. The thermocouple abuts against the DC terminal after being inserted sequentially through the guide hole, the fourth through hole, and the second through hole.

[0005] By adopting the above technical solution, the heating rod can heat the socket terminals and the DC terminals connected to them, simulating the temperature rise scenario in the actual operation of the charging gun; the thermocouple can be directly connected to the DC terminal to directly detect the true temperature of the DC terminal, effectively avoiding the problem of inaccurate temperature readings caused by differences in terminal thermal conductivity or internal sensor deviation, and significantly improving the test accuracy; at the same time, the thermocouple is precisely positioned through the guide hole, the fourth through hole and the second through hole to ensure stable contact with the DC terminal, further ensuring the reliability of temperature detection.

[0006] In one specific implementation, the temperature sensor further includes a housing, on which a housing base is connected, and a slide rail is provided on the housing. The thermocouple is slidably mounted on the housing via the slide rail. A spring is connected to the thermocouple, and the end of the spring away from the thermocouple is connected to the housing.

[0007] By adopting the above technical solution, the slide provides a stable sliding guide for the thermocouple, ensuring that the thermocouple can be inserted along a fixed path and abut against the DC terminal; the spring has an elastic reset function. During the insertion of the thermocouple, the spring can push the thermocouple tightly against the surface of the DC terminal through its own elastic force, avoiding temperature detection errors caused by contact gaps. At the same time, when disassembling the temperature sensor, the spring can assist the thermocouple to automatically reset, improving the convenience of operation.

[0008] In one specific implementation, a first magnet is installed on the housing, a second magnet is installed on the box, and the temperature sensor is detachably connected to the box by the attraction between the first magnet and the second magnet.

[0009] By adopting the above technical solution, the temperature sensor can be detachably connected to the housing by utilizing the adsorption properties of magnets. There is no need for complex connecting parts such as screws and clips. The installation and disassembly process can be completed simply by adsorbing or separating the magnets. The operation is simple and quick, which greatly improves the assembly efficiency of the test device. At the same time, it facilitates the subsequent maintenance, calibration or replacement of the temperature sensor.

[0010] In one specific implementation, a stop bar is mounted on the housing, and the first magnet is pressed against the housing by the stop bar.

[0011] By adopting the above technical solution, the push rod can apply a stable pressing force to the first magnet, firmly fixing the first magnet to the housing, and preventing the temperature sensor from losing its adsorption force due to the first magnet loosening or shifting during installation, use or disassembly.

[0012] In one specific implementation, the socket terminal has a threaded hole, and a clamping end piece is detachably installed on the socket terminal through the threaded hole and a screw. The clamping end piece is located at the end of the socket terminal that is plugged into the DC terminal.

[0013] By adopting the above technical solution, the clamping end piece can be detachably installed through screws and threaded holes, which can tightly press the DC terminal onto the socket terminal, reduce the gap between the DC terminal and the socket terminal, reduce contact resistance, avoid local abnormal heating due to poor contact, ensure that the heat generated by the heating rod can be evenly transferred to the DC terminal, simulate the real heating environment, and improve the authenticity of the test results.

[0014] In one specific implementation, the clamping end piece is an arc-shaped plate, and the outline of the inner arc of the clamping end piece is the same as the outer outline of the DC terminal.

[0015] By adopting the above technical solution, the arc-shaped pressing end piece is adapted to the outline of the DC terminal, which can increase the contact area between the pressing end piece and the DC terminal, so that the pressing force is evenly distributed on the surface of the DC terminal, further improving the contact tightness between the DC terminal and the socket terminal, ensuring the fit effect of the two, and enabling the two to fit tightly together.

[0016] In one specific implementation, the base has a first through hole aligned with the threaded hole, and the charging gun has a third through hole.

[0017] By adopting the above technical solution, when the charging gun is inserted into the vehicle sample socket, the first through hole, the third through hole and the threaded hole are aligned. The operator can pass the screwdriver through the first through hole and the third through hole in sequence, and then insert it into the threaded hole to tighten the screw, thereby adjusting the clamping end piece and improving the ease of operation.

[0018] In one specific implementation, a fastening groove is formed on the seat.

[0019] By adopting the above technical solution, the slot can cooperate with the hook structure on the charging gun. When the charging gun is inserted into the vehicle sample socket, the hook of the charging gun can be locked into the slot, thereby achieving the positioning and fixation of the charging gun and the vehicle sample socket.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. High temperature detection accuracy: By directly contacting the DC terminal with a thermocouple, the true temperature of the DC terminal can be obtained directly, effectively avoiding detection errors caused by internal sensor deviation and differences in terminal thermal conductivity, greatly improving test accuracy, and ensuring that the charging gun can accurately verify whether it triggers overheat protection at 90℃.

[0021] 2. Easy installation and disassembly: The temperature sensor is detachably connected to the housing by magnetic adsorption, and installation and disassembly can be completed without complicated tools; the clamping end plate is detachably installed by screws and can be adjusted through aligned through holes, making operation simple and improving the assembly efficiency and maintenance convenience of the testing device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the test apparatus according to an embodiment of this application.

[0023] Figure 2 This is a schematic diagram illustrating the connection position relationship between the charging gun and the vehicle socket in an embodiment of this application.

[0024] Figure 3This is a schematic diagram of a vehicle-shaped socket according to an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of a copper sheet according to an embodiment of this application.

[0026] Figure 5 This is a schematic diagram of the clamping end piece according to an embodiment of this application.

[0027] Figure 6 This is a schematic diagram of the second magnet in an embodiment of this application.

[0028] Figure 7 This is a schematic diagram of a temperature sensor according to an embodiment of this application.

[0029] Figure 8 This is a schematic diagram illustrating the state of the thermocouple after it is inserted into the vehicle sample socket according to an embodiment of this application.

[0030] Reference numerals: 1. Housing; 2. Car-shaped socket; 21. Base; 211. First through hole; 212. Guide hole; 22. Socket terminal; 221. Threaded hole; 222. Clamping end piece; 223. Second through hole; 23. Copper sheet; 24. Heating rod; 25. Snap-in groove; 3. Temperature sensor; 31. Housing; 311. Slide rail; 32. Housing base; 321. Support rod; 33. Thermocouple; 34. Spring; 35. First magnet; 36. Second magnet; 41. Third through hole; 42. Fourth through hole. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0032] This application discloses a charging gun temperature rise testing device, referring to... Figure 1 and Figure 2 It includes a housing 1, on which a vehicle-shaped socket 2 is fixedly installed, and a temperature sensor 3 is detachably installed.

[0033] Reference Figure 3 and Figure 4 The vehicle-mounted socket 2 includes a base 21, which has a socket chamber for inserting into the charging gun. The base 21 has a latching groove 25 for positioning and engaging the charging gun's hook. Two socket terminals 22, which insert into the DC terminals of the charging gun, are fixedly mounted on the base 21. In this embodiment, the charging gun is prior art; the DC terminals of the charging gun refer to the positive and negative contact terminals connected to the power supply, mainly used for fast charging of new energy vehicles. One end of the socket terminal 22 extends into the socket chamber of the base 21, and the other end extends out of the socket chamber and is fixedly connected to a copper plate 23. The copper plate 23 connects the two socket terminals 22 to form a complete current loop.

[0034] Reference Figure 4 , Figure 5 and Figure 8 The socket terminal 22 has a threaded hole 221 at one end that extends into the insertion chamber. A clamping end piece 222 is detachably installed on the socket terminal 22 through the threaded hole 221. The clamping end piece 222 is an arc-shaped plate, and the outline of the inner arc of the clamping end piece 222 is the same as the outline of the DC terminal. A heating element, which is a heating rod 24, is embedded in the socket terminal 22. The heating part of the heating rod 24 is embedded at the end of the socket terminal 22 that extends into the insertion chamber. The connecting wire of the heating rod 24 is connected to a power source from the rear of the insertion chamber.

[0035] The base 21 has a first through hole 211, which is aligned with the threaded hole 221.

[0036] Reference Figure 6 , Figure 7 and Figure 8 The temperature sensor 3 includes a housing 31 and a housing base 32. The housing base 32 is snapped onto the housing 31. A slide rail 311 is provided on the housing 31, through which a thermocouple 33 for measuring temperature is slidably connected. A spring 34 is fixedly installed at the end of the thermocouple 33 near the housing base 32, and the end of the spring 34 away from the thermocouple 33 abuts against the housing base 32. A first magnet 35 is placed on the housing 31, and a push rod 321 is fixedly installed on the housing base 32. The housing base 32 uses the push rod 321 to press the first magnet 35 against the housing 31. A second magnet 36 is detachably installed on the housing 1 by screws. The temperature sensor 3 is attracted to the housing 1 by the attraction between the first magnet 35 and the second magnet 36. A guide hole 212 for inserting the thermocouple 33 is provided on the base 21, and a second through hole 223 is provided on the clamping end plate 222, which is aligned with the guide hole 212.

[0037] Reference Figure 2 The charging gun is inserted into the side wall of the insertion end of the car sample socket 2. A third through hole 41 and a fourth through hole 42 are provided. After the charging gun is inserted into the car sample socket 2, the third through hole 41 can be aligned with the threaded hole 221, and the fourth through hole 42 can be aligned with the guide hole 212.

[0038] Before inserting the charging gun into the housing 1, remove the temperature sensors 3 on both sides of the housing 1 and loosen the clamping end plate 222 to make it slack. Then, insert the charging gun into the vehicle-mounted socket 2. Next, insert a screwdriver through the first through hole 211 and the third through hole 41 and tighten the screws that hold the clamping end plate 222 in place to ensure that the socket terminal 22 can make tight and secure contact with the DC terminal. Then, align the thermocouple 33 with the guide hole 212 so that the thermocouple 33 passes through the guide hole 212, the fourth through hole 42 and the second through hole 223 in sequence and is pressed against the DC terminal of the charging gun. Finally, it is attracted to the housing 1 by the first magnet 35 and the second magnet 36. Finally, the charging gun is connected to the power supply to generate current, and the heating rod 24 is connected to the power supply to heat the socket terminal 22 and the DC terminal. Observe whether the charging gun can automatically cut off the power when the temperature measured by the temperature sensor 3 reaches 90°C.

[0039] The implementation principle of this application embodiment is as follows: Before conducting the charging gun temperature rise test, first remove the temperature sensors 3 on both sides of the housing 1, loosen the screws on the socket terminal 22, so that the clamping end piece 222 is in a relaxed state, making it easy to insert the charging gun. Align the charging gun with the insertion chamber of the base 21 and insert it, so that the hook on the charging gun is engaged in the buckle groove 25 of the base 21, thereby fixing the charging gun. At this time, the third through hole 41 on the charging gun is aligned with the first through hole 211 of the base 21 and the threaded hole 221 of the socket terminal 22, and the fourth through hole 42 is aligned with the guide hole 212 of the base 21 and the second through hole 223 of the clamping end piece 222.

[0040] Next, pass the screwdriver through the first through hole 211 and the third through hole 41 in sequence, insert it into the threaded hole 221 and turn the screw to gradually tighten the clamping end piece 222 and make it fit tightly against the surface of the DC terminal, firmly pressing the DC terminal onto the socket terminal 22 to ensure good contact between the two.

[0041] Subsequently, the thermocouple 33 of the temperature sensor 3 is aligned with the guide hole 212 of the base 21. The temperature sensor 3 is pushed so that the thermocouple 33 passes through the guide hole 212, the fourth through hole 42 of the charging gun, and the second through hole 223 of the clamping end piece 222 in sequence, until the thermocouple 33 abuts against the DC terminal. At this time, the first magnet 35 on the temperature sensor 3 and the second magnet 36 on the housing 1 attract each other, fixing the temperature sensor 3 to the housing 1. At the same time, the spring 34 pushes the thermocouple 33 to tightly abut against the DC terminal, ensuring the accuracy of temperature detection.

[0042] Finally, the power supply to the heating rod 24 is turned on. The heating rod 24 heats the socket terminal 22 and the DC terminal to simulate the temperature rise during the charging process. At the same time, the charging gun is connected to the power supply to simulate the actual charging conditions. The operator monitors the temperature of the DC terminal in real time through the thermocouple 33 of the temperature sensor 3. When the temperature reaches 90°C, the operator observes whether the charging gun triggers the overheat protection mechanism and automatically cuts off the power. If the charging gun can automatically cut off the power, it indicates that the charging gun meets the safety standards; if not, the overheat protection system of the charging gun needs to be further checked for malfunctions.

[0043] After the test is completed, first disconnect the power supply to the heating rod 24 and the charging gun. After the temperature drops to a safe range, remove the temperature sensor 3, loosen the screws of the clamping end plate 222, and then pull the charging gun out of the base 21 to complete one test procedure.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A charging gun temperature rise testing device, characterized in that: The device includes a housing (1), on which a vehicle-shaped socket (2) for connecting to a charging gun is installed. The vehicle-shaped socket (2) includes a base (21), on which a socket terminal (22) for connecting to the DC terminal of the charging gun is installed. One end of the socket terminal (22) is connected to form a circuit. A heating element for heating is installed on the socket terminal (22). A temperature sensor (3) is detachably installed on the housing (1). The temperature sensor (3) includes a thermocouple (33) for detecting temperature. A guide hole (212) for inserting the thermocouple (33) is provided on the base (21). A second through hole (223) is provided on the socket terminal (22). A fourth through hole (42) is provided on the side wall of the end where the charging gun is inserted into the vehicle-shaped socket (2). The thermocouple (33) abuts against the DC terminal after being inserted into the guide hole (212), the fourth through hole (42) and the second through hole (223) in sequence.

2. The charging gun temperature rise testing device according to claim 1, characterized in that: The temperature sensor (3) also includes a housing (31), on which a housing base (32) is connected. A slide rail (311) is provided on the housing (31). The thermocouple (33) is slidably mounted on the housing (31) through the slide rail (311). A spring (34) is connected to the thermocouple (33). The end of the spring (34) away from the thermocouple (33) is connected to the housing (31).

3. The charging gun temperature rise testing device according to claim 2, characterized in that: A first magnet (35) is installed on the cover (31), and a second magnet (36) is installed on the box (1). The temperature sensor (3) is detachably connected to the box (1) by the attraction between the first magnet (35) and the second magnet (36).

4. The charging gun temperature rise testing device according to claim 3, characterized in that: A stop bar (321) is installed on the housing (32), and the first magnet (35) is pressed against the housing (31) by the stop bar (321).

5. The charging gun temperature rise testing device according to claim 1, characterized in that: The socket terminal (22) has a threaded hole (221). The socket terminal (22) is detachably mounted with a clamping end piece (222) through the threaded hole (221) and a screw. The clamping end piece (222) is located at the end of the socket terminal (22) that is plugged into the DC terminal.

6. The charging gun temperature rise testing device according to claim 5, characterized in that: The clamping end piece (222) is an arc-shaped plate, and the outline of the inner arc of the clamping end piece (222) is the same as the outline of the DC terminal.

7. The charging gun temperature rise testing device according to claim 5, characterized in that: The base (21) has a first through hole (211) aligned with the threaded hole (221), and the charging gun has a third through hole (41).

8. The charging gun temperature rise testing device according to claim 1, characterized in that: A groove (25) is provided on the seat (21).

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