A supercharging pile on-site testing equipment

Abstract

This invention discloses a supercharging pile on-site testing device, including a chassis with multiple charging gun sockets on the top. Each charging gun socket includes a base and a protective sleeve, with the sleeve installed in the base. The protective sleeve has a first groove, and a second groove extending to the top surface of the sleeve is located at the top of the first groove. A temperature sensor assembly is located in the first groove. A partition plate is located at the bottom of the sleeve, with a heat-conducting arc-shaped portion near the first groove. A heat-conducting connection portion is located near the heat-conducting arc-shaped portion on the side of the sleeve. An air inlet pipe is connected to one end of an elastic spiral tube at the bottom. A coil is located inside the heat-conducting arc-shaped portion, with the air inlet pipe connected to one end of the coil, and an air outlet pipe connected to the other end of the coil. This invention efficiently and directly conducts heat from the partition plate at the bottom of the sleeve and the testing charging gun head to the sensor probe through the coil and the elastic spiral tube.

Description

Technical Field

[0001] This invention relates to the field of on-site testing devices for supercharging piles, and more specifically to an on-site testing device for supercharging piles. Background Technology

[0002] Currently, with the large-scale construction and widespread application of charging facilities, the importance of accurate metering of charging facilities is becoming increasingly prominent. The accuracy of charging metering is related to the real interests of charging users and, more importantly, to the national strategy of popularizing electric vehicles. In order to ensure the fairness and impartiality of charging services, the state has included AC and DC charging facilities in the mandatory verification catalog, and mandatory verification work must be carried out on AC and DC charging facilities regularly in accordance with the verification procedures.

[0003] However, billing for ultra-fast charging requires high-precision real-time monitoring because the rapid charging speed and short charging time demand higher accuracy in measurement. In high-power charging scenarios (the higher the charging power, the greater the heat generated during charging), the charging quality and charging gun interface temperature during the charging process significantly impact the safe operation of the charging pile and the electric vehicle battery. Monitoring the charging gun interface temperature helps determine the reliability of the contact between the charging pile and the electric vehicle. Threshold judgments are made based on pre-set temperature limits, and warnings are issued through the platform. Furthermore, big data analysis is used to study the impact of temperature changes on measurement.

[0004] Existing on-site testing instruments for supercharging stations typically place temperature detectors at the charging gun interface on the outer surface of the interface. However, because the protective sleeve is made of heat-insulating plastic to facilitate plugging and unplugging by the operator, the final measured temperature is inaccurate, leading to imprecise subsequent analysis. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a supercharging pile on-site testing device. This device solves the shortcomings of existing supercharging pile on-site testing instruments, where the temperature detector at the charging gun interface is generally located on the external area of ​​the interface. Because the protective sleeve is made of heat-insulating plastic, the final measured temperature is inaccurate, leading to imprecise subsequent analysis.

[0006] The technical solution adopted in this invention is as follows: A supercharging pile on-site testing device includes a chassis with multiple charging gun sockets on the top. Each charging gun socket includes a base and a protective sleeve. The protective sleeve is installed in the base and has a first groove. A second groove extending to the top surface of the protective sleeve is provided in the top of the first groove. A temperature sensor assembly is provided in the first groove. The temperature sensor assembly includes a downwardly extending rod-shaped sensor probe inserted into the bottom of the first groove. A hollow elastic spiral tube is sleeved on the outside of the sensor probe. The bottom of the elastic spiral tube is fixed to the bottom of the first groove. A partition plate is provided at the bottom of the protective sleeve. A heat-conducting arc-shaped part is provided on the side of the partition plate near the first groove. A heat-conducting connection part is provided on the side of the protective sleeve near the heat-conducting arc-shaped part. An air inlet pipe is connected to one end of the bottom of the elastic spiral tube. A coil is provided inside the heat-conducting arc-shaped part. The air inlet pipe is connected to one end of the coil, and the other end of the coil is connected to an air outlet pipe. This invention uses a coil, an elastic spiral tube, and flowing air to directly and efficiently transfer the heat from the partition plate at the bottom of the casing and the test charging gun head to the sensor probe. This solves the problem that existing supercharging pile field testing instruments typically place the temperature detector at the charging gun interface on the external area of ​​the interface. Because the casing is made of heat-insulating plastic, the final measured temperature is inaccurate, leading to imprecise subsequent analysis. Furthermore, the use of airflow heat transfer also meets the stringent requirements for the insulation performance of the casing.

[0007] Optionally, an airflow guide plate is provided on the inner side of the flexible spiral tube.

[0008] Optionally, the airflow guide plate is made of a thermally conductive elastic material.

[0009] Optionally, the bottom of the second slide is provided with a lower air guide pipe, and the lower air guide pipe is provided with a compression chamber on the side near the seat body. The compression chamber is provided with a piston assembly, the piston assembly includes a piston rod and a drive motor for driving the piston rod to move, and the compression chamber is provided with an air outlet on the side near the lower air guide pipe, the air outlet being connected to the air outlet pipe.

[0010] Optionally, the temperature sensor assembly has a lower contact piece at its bottom, and a micro-control switch is provided below the lower contact piece. The micro-control switch is used to adjust the opening or closing of the temperature sensor assembly, and a trigger rod connected to the temperature sensor assembly is provided in the second slide groove.

[0011] Optionally, the housing is equipped with a mobile power supply, and the drive motor, micro-control switch, temperature sensor assembly and mobile power supply are connected in series to form a closed circuit.

[0012] Optionally, a first conductive sheet is provided on the side of the temperature sensor assembly near the base, and a second conductive sheet is provided on the base, wherein the first conductive sheet and the second conductive sheet are in continuous contact when sliding relative to each other.

[0013] Optionally, the casing is provided with multiple charging connectors.

[0014] Optionally, the front of the chassis is provided with a tilting panel, which includes a display panel and multiple buttons. Optionally, the rear of the chassis is provided with an auxiliary test line, the end of which is provided with a test charging gun head, and the top of the chassis is provided with handles on both sides.

[0015] The beneficial effects of the present invention include at least the following: 1. This invention enables the heat from the heat-conducting arc section to be transferred to the sensor probe of the temperature sensor assembly as quickly as possible, resulting in faster and more accurate temperature detection.

[0016] 2. In this invention, the heat of the airflow will be fully exchanged with the sensor probe (the airflow stays for a longer time), avoiding the formation of laminar flow on the smooth surface of the sensor probe due to the high speed of the airflow (laminar flow plays an insulating role and affects the heat transfer efficiency. At this time, there is only heat conduction and no heat convection, that is, the airflow directly exchanges heat with the heat-conducting material), thus reducing the heat transfer efficiency.

[0017] 3. The airflow guide plate of the present invention deforms downward and continuously contacts the sensor probe. On the one hand, it directly transfers the heat of the gas and the heat of the elastic spiral tube to the sensor probe, resulting in higher heat transfer efficiency. On the other hand, it slows down the movement of the sensor probe, making the movement of the sensor probe smoother. As the sensor probe is inserted deeper, the airflow guide plate deforms more, providing feedback to the operator on the force applied, preventing excessive force that could damage the sensor probe or the micro-control switch. The airflow guide plate forms a flow cavity that spirals upward and slopes downward at the bottom, which is conducive to the upward movement of the airflow slope. Based on the wall adhesion effect, it prevents the airflow speed from being too fast, thus ensuring more complete heat exchange. Attached Figure Description

[0018] Figure 1 This is a perspective view of a supercharging pile on-site testing device according to Embodiment 1 of the present invention; Figure 2 This is a partial cross-sectional view of the charging gun socket of a supercharging pile field testing device according to Embodiment 1 of the present invention; Figure 3 This is a charging gun socket for a supercharging pile field testing device according to Embodiment 1 of the present invention. Figure 2 A magnified view of part A; Figure 4 This is a partial three-dimensional structural diagram of the elastic spiral tube of a supercharging pile field testing device according to Embodiment 1 of the present invention; Figure 5 This is a diagram of the coil structure of a supercharging pile field testing device according to Embodiment 1 of the present invention; Figure 6This is a cross-sectional view of the elastic spiral tube of a supercharging pile field testing device according to Embodiment 2 of the present invention; Figure 7 This is a partial cross-sectional view of the charging gun socket of a supercharging pile field testing device according to Embodiment 4 of the present invention.

[0019] The labels for the attached figures are as follows: 1. Chassis; 2. Tiltd panel; 3. Display panel; 4. Buttons; 5. Charging gun socket; 6. Base; 7. Protective sleeve; 8. Charging connector; 9. Auxiliary test cable; 10. Test charging gun head; 11. Handle; 12. First slide groove; 13. Second slide groove; 14. Temperature sensor assembly; 15. Microcontroller switch; 16. Sensor probe; 17. Elastic spiral tube; 18. Divider plate; 19. Heat-conducting arc part; 20. Heat-conducting connection part; 21. Inlet pipe; 22. Coil; 23. Outlet pipe; 24. Lower air guide pipe; 25. Compression chamber; 26. Piston assembly; 27. Drive motor; 28. Outlet; 29. ​​Lower contact plate; 30. Piston rod; 31. Airflow guide plate; 32. First conductive plate; 33. Second conductive plate; 34. Trigger rod. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Example 1

[0023] The technical solution adopted in this invention is as follows: like Figure 1 , Figure 2 and Figure 3 As shown, this invention discloses a supercharging pile on-site testing device, including a chassis 1. The front of the chassis has a tilted panel 2, on which a display panel 3 and multiple buttons 4 are provided. The top of the chassis has multiple charging gun sockets 5, each socket including a base 6 and a protective sleeve 7. The protective sleeve is installed in the base and contains multiple charging connectors 8. The rear of the chassis has auxiliary test lines 9, with test charging gun heads 10 at their ends. Handles 11 are provided on both sides of the top of the chassis.

[0024] The protective casing has a first sliding groove 12, and a second sliding groove 13 extending to the top surface of the protective casing is provided at the top of the first sliding groove. A temperature sensor assembly 14 is provided in the first sliding groove, and a lower contact piece 29 is provided at the bottom of the temperature sensor assembly. A micro-control switch 15 is located below the lower contact piece. The micro-control switch is used to adjust the opening or closing of the temperature sensor assembly. A trigger rod 34 connected to the temperature sensor assembly is provided in the second sliding groove.

[0025] In this embodiment, the size of the second slide is smaller than that of the first slide, so that when the temperature sensor assembly bounces upward, it will be stopped by the second slide and stop moving upward.

[0026] The temperature sensor assembly includes a downwardly extending rod-shaped sensor probe 16.

[0027] In another embodiment, one side of the elastic helical tube abuts against the sidewall of the first groove, which is away from the microcontroller switch.

[0028] In this embodiment, the sensor probe can also maintain the stability of the elastic helical tube, without bending or deviating.

[0029] like Figure 4 As shown, the sensor probe is inserted into the bottom of the first groove. A hollow elastic spiral tube 17 is sleeved on the outside of the sensor probe. The bottom of the elastic spiral tube is fixed to the bottom of the first groove. A partition plate 18 is provided at the bottom of the protective tube. The charging connector passes through the partition plate. A heat-conducting arc-shaped part 19 is provided on the side of the partition plate near the first groove. A heat-conducting connection part 20 is provided on the side of the protective tube near the heat-conducting arc-shaped part. An air inlet pipe 21 is connected to one end of the bottom of the elastic spiral tube. In this invention, an insulating material is selected as the heat-conducting material.

[0030] In this embodiment, the flexible spiral tube is made of a material with high thermal conductivity. The top of the flexible spiral tube has an opening for easy air intake and exhaust, and the two ends of the flexible spiral tube do not need to be sealed.

[0031] In this embodiment, the first groove is filled with a gas with a high thermal conductivity, such as nitrogen or helium, to improve heat dissipation efficiency and flame retardant performance.

[0032] like Figure 5 As shown, a coil 22 is provided inside the heat-conducting arc-shaped part, an air inlet pipe is connected to one end of the coil, and an air outlet pipe 23 is connected to the other end of the coil.

[0033] The bottom of the second slide is provided with a lower air guide pipe 24. The lower air guide pipe is provided with a compression chamber 25 on the side near the seat body. The compression chamber is provided with a piston assembly 26. The piston assembly includes a piston rod 30 and a drive motor 27 for driving the piston rod to move. The compression chamber is provided with an air outlet 28 on the side near the lower air guide pipe. The air outlet is connected to the air outlet pipe.

[0034] The piston rod in this embodiment has a semi-circular cross-section.

[0035] A mobile power supply is installed inside the base. The drive motor, microcontroller, temperature sensor assembly, and mobile power supply are connected in series to form a closed circuit.

[0036] In this embodiment, the charging gun plug is inserted into the charging gun socket, and squeezing the trigger rod pushes the temperature sensor assembly downwards, triggering the micro-control switch. The micro-control switch, drive motor, temperature sensor assembly, and power supply are connected in series to form a closed circuit. At this time, the temperature sensor assembly and drive motor start working, and the heat-conducting arc-shaped part transfers heat to the first slide groove through the heat-conducting connection part. The temperature sensor assembly descends and compresses the elastic spiral tube, and the drive motor drives the piston rod to work in the compression chamber, causing the air pressure in the first slide groove to change periodically. When the drive motor drives the piston rod to contract, the air pressure in the first slide groove decreases. Because the outlet is close to the piston rod, the gas in its outlet pipe flows out, driving the gas in the coil and elastic spiral tube into the first slide groove, promoting the circulation of gas in the first slide groove and airflow in the coil. In conjunction with the elastic spiral tube, one side abuts against the side wall of the first slide groove away from the micro-control switch. When the drive motor drives the piston rod to extend, it compresses the gas in the first slide groove. At this point, the piston rod moves and closes the air outlet, causing the air pressure in the first groove to increase rapidly. This allows the gas in the first groove to enter the coil through the elastic spiral tube. Compared to heat transfer using a single, non-flowing solid homogeneous medium (it should be noted that the insulation requirements of the sheath itself prevent the use of materials with high thermal conductivity), this embodiment allows the heat from the heat-conducting arc part to be transferred to the sensor probe of the temperature sensor assembly as quickly as possible. This results in faster and more accurate temperature detection, making it easier for the supercharging pile on-site testing instrument to monitor and analyze temperature changes at the charging gun head.

[0037] Example 2 The difference between Example 2 and Example 1 is that, as Figure 6 As shown, an airflow guide plate 31 is provided on the inner side of the elastic spiral tube. In this embodiment, the airflow guide plate is made of a thermally conductive material.

[0038] In this embodiment, an airflow guide plate is provided on the inner side of the elastic spiral tube. When the drive motor drives the piston rod to extend, it compresses the gas in the first groove. At this time, after the piston rod moves, it closes the air outlet, causing the air pressure in the first groove to increase rapidly. Under the action of the airflow guide plate, the air moves spirally upward. At this time, the heat of the airflow will be fully exchanged with the sensor probe (the airflow stays for a longer time), avoiding the formation of laminar flow on the smooth surface of the sensor probe due to the excessive airflow speed (laminar flow plays an insulating role, affecting the heat transfer efficiency. At this time, there is only heat conduction, not heat convection, that is, the airflow directly exchanges heat with the heat-conducting material), thus reducing the heat transfer efficiency.

[0039] Example 3

[0040] The difference between Example 3 and Example 2 is that the airflow guide plate in this example is made of a thermally conductive elastic material.

[0041] In this embodiment, the elastic spiral tube is made of a thermally conductive material. As the sensor probe moves, the airflow guide plate deforms downwards and continues to contact the sensor probe. On the one hand, it directly transfers the heat from the gas and the elastic spiral tube to the sensor probe, resulting in higher heat transfer efficiency. On the other hand, it slows down the movement of the sensor probe, making its movement smoother. As the sensor probe is inserted deeper, the airflow guide plate deforms more, providing feedback to the operator on the force applied, preventing excessive force that could damage the sensor probe or the microcontroller switch. The airflow guide plate forms a spiral upwards and a downward-sloping slope at the bottom, which facilitates the upward movement of the airflow slope. Based on the wall adhesion effect, this prevents excessively fast airflow, resulting in more thorough heat exchange.

[0042] Example 4 The difference between Example 4 and Example 1 is that, as Figure 7 As shown, a mobile power supply is provided inside the base, and the micro-control switch, temperature sensor assembly, and mobile power supply are connected in series to form a closed circuit. The micro-control switch is used to adjust the opening or closing of the temperature sensor assembly. In this embodiment, a first conductive sheet 32 ​​is provided on the side of the temperature sensor assembly near the base, and a second conductive sheet 33 is provided on the base. The first conductive sheet and the second conductive sheet are in continuous contact when sliding relative to each other.

[0043] In this embodiment, the first conductive sheet and the second conductive sheet remain in contact while sliding relative to each other, eliminating the need for flexible wires and simplifying the structure.

[0044] The above description is merely a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present invention.

Claims

1. A supercharging pile on-site testing device, characterized in that, The device includes a chassis with multiple charging gun sockets on the top. Each charging gun socket includes a base and a protective sleeve. The protective sleeve is installed in the base and has a first groove. A second groove extends from the top of the first groove to the top surface of the protective sleeve. A temperature sensor assembly is located in the first groove. The temperature sensor assembly includes a downwardly extending rod-shaped sensor probe inserted into the bottom of the first groove. A hollow elastic spiral tube is fitted around the outside of the sensor probe, and the bottom of the elastic spiral tube is fixed to the bottom of the first groove. A partition plate is located at the bottom of the protective sleeve. A heat-conducting arc-shaped portion is located on the side of the partition plate near the first groove. A heat-conducting connection portion is located on the side of the protective sleeve near the heat-conducting arc-shaped portion. An air inlet pipe is connected to one end of the bottom of the elastic spiral tube. A coil is located inside the heat-conducting arc-shaped portion. The air inlet pipe is connected to one end of the coil, and the other end of the coil is connected to an air outlet pipe.

2. The on-site testing equipment for supercharging piles as described in claim 1, characterized in that, An airflow guide plate is provided on the inner side of the flexible spiral tube.

3. The on-site testing equipment for supercharging piles as described in claim 2, characterized in that, The airflow guide plate is made of thermally conductive elastic material.

4. A supercharging pile on-site testing device as described in claim 1, 2, or 3, characterized in that, The bottom of the second slide is provided with a lower air guide pipe. The lower air guide pipe is provided with a compression chamber on the side near the seat body. The compression chamber is provided with a piston assembly. The piston assembly includes a piston rod and a drive motor for driving the piston rod to move. The compression chamber is provided with an air outlet on the side near the lower air guide pipe. The air outlet is connected to the air outlet pipe.

5. The on-site testing equipment for supercharging piles as described in claim 4, characterized in that, The temperature sensor assembly has a lower contact plate at its bottom, and a micro-control switch is located below the lower contact plate. The micro-control switch is used to adjust the opening or closing of the temperature sensor assembly. A trigger rod connected to the temperature sensor assembly is located in the second slide groove.

6. The on-site testing equipment for supercharging piles as described in claim 5, characterized in that, The seat is equipped with a mobile power supply, and the drive motor, micro-control switch, temperature sensor assembly and mobile power supply are connected in series to form a closed circuit.

7. The on-site testing equipment for supercharging piles as described in claim 6, characterized in that, The temperature sensor assembly has a first conductive sheet on the side near the base, and a second conductive sheet on the base. The first conductive sheet and the second conductive sheet are in continuous contact when they slide relative to each other.

8. A supercharging pile on-site testing device as described in claim 1, 2, or 3, characterized in that, The casing is equipped with multiple charging connectors.

9. A supercharging pile on-site testing device as described in claim 1, 2, or 3, characterized in that, The front of the chassis is equipped with a tilted panel, which has a display panel and multiple buttons.

10. A supercharging pile on-site testing device as described in claim 1, 2, or 3, characterized in that, The rear of the chassis is equipped with auxiliary test lines, and the end of the auxiliary test lines is equipped with a test charging gun head. The top of the chassis is equipped with handles on both sides.

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