Detection device for vehicle-mounted charging gun

Abstract

The utility model relates to the technical field of charging piles, in particular to a detection device for a vehicle-mounted charging gun, which comprises a box body, the box body is provided with a sealed box door, the box door is provided with a charging pile socket, and a first detection point and a second detection point of the charging pile socket are connected in series with a leakage protection switch in the box body to form a load closed loop. The third detection point and the fourth detection point of the charging pile socket are correspondingly connected with a CP line test lamp and a CC line test lamp on the box door respectively, and the CP line test lamp and the CC line test lamp are both connected to the fifth detection point of the charging pile socket. The detection device can detect whether the charging gun is good or not, can judge whether the charging gun outputs voltage or not, can judge whether the output voltage can be loaded or not, can detect the voltage of a CC charging gun connecting line, and can determine the voltage of a CP charging line.

Description

Technical Field

[0001] This utility model relates to the field of charging pile technology, specifically a detection device for vehicle-mounted charging guns. Background Technology

[0002] Currently, most new energy vehicles are equipped with onboard charging guns. When you need to use the onboard charging gun and encounter a charging failure, you need to determine whether the problem lies with the charging station or the charging gun.

[0003] While some existing charging stations have online monitoring systems for self-diagnosis and fault reporting when damaged, malfunctions in the on-board charging gun require manual troubleshooting beforehand, such as testing the same gun at different charging stations. This method is not only cumbersome and inefficient, but also lacks timely detection capabilities. Utility Model Content

[0004] The purpose of this invention is to provide a detection device for vehicle-mounted charging guns to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A testing device for an on-board charging gun includes a housing with a sealed door. A charging pile socket is installed on the door. The first and second detection points of the charging pile socket are connected in series with a leakage current protection switch located inside the housing to form a closed load circuit. The third and fourth detection points of the charging pile socket are respectively connected to a CP line test light and a CC line test light located on the door. Both the CP line test light and the CC line test light are connected to a fifth detection point of the charging pile socket.

[0007] Furthermore, the enclosure is equipped with an ammeter and a voltmeter. The ammeter is connected to the load closed loop via a current transformer and is used to detect the current value of the load closed loop. The voltmeter is connected to the load closed loop and is used to detect the voltage value of the load closed loop.

[0008] Furthermore, the ammeter and voltmeter are located on both sides of the leakage current protection switch, and the leakage current protection switch is also connected in series with a load bulb, which is installed on the door of the box.

[0009] Furthermore, a DC charging port is installed on the door, and the DC charging port is connected to the load closed loop via an AC-DC module.

[0010] Furthermore, the load closed loop is connected to the load output port, which is located on the housing.

[0011] Furthermore, the third and fourth detection points of the power supply socket are connected to a switch, a resistor, and a capacitor, wherein the switch and resistor are connected in parallel and then connected in series with the capacitor. The switch is located on the door of the box, and the resistor and capacitor are located inside the box.

[0012] Furthermore, the door is equipped with an AC voltage and current display screen and a DC voltage and current display screen.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The testing device of this utility model can detect the quality of a charging gun, determine whether the charging gun has voltage output, and whether the output voltage can carry a load.

[0015] In this invention's testing device, when the charging gun is connected to the CC and CP terminals, the third testing point will detect a resistance equal to the sum of the capacitance RC and resistor R4. When this resistance is equal to the sum of the capacitance RC and resistor R4, the switch S3 will close, indicating the charging gun is in a semi-connected state. When the third testing point detects a resistance equal to the sum of the capacitance RC and resistor R4, the charging gun is in a connected state (the CC line test light will illuminate).

[0016] In this invention's testing device, the charging gun is connected to the CC / CP terminal contact, and the voltage at the first testing point changes from 12V to... The charging station detects that the charging gun is connected. The S1 switch of the charging station switches to the 12V PWM wave signal terminal. The signal at the first detection point changes from a 9V DC voltage signal to a 9V PWM signal, indicating that the charging equipment has entered the ready state.

[0017] Once the vehicle detects that the charging gun is connected, the charger will determine the battery's needs and whether the battery has any charging faults. If there are no faults, the charger will close the S3 relay, indicating that the vehicle is ready and requesting charging.

[0018] The first detection at the charging pile is a 9V PWM square wave signal. When the charging pile detects this signal, it confirms that the vehicle is ready and requests charging. The charging pile closes the K1 and K2 relay switches, and the power from the L1 and N terminals of the charging pile enters the vehicle, thereby charging the vehicle. The load light bulb illuminates. Attached Figure Description

[0019] Figure 1 This is the circuit diagram of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model.

[0021] Figure 3 This utility model Figure 2 Another perspective illustration.

[0022] In the diagram: 1-Box body, 2-Box door, 3-Charging pile socket, 4-DC charging port, 5-CP line test light, 6-CC line test light, 7-AC voltage and current display screen, 8-DC voltage and current display screen, 9-Leakage protection switch, 10-Microcontroller module, 11-Partition, 12-Separator plate, 13-Channel I, 14-Channel II, 15-Mesh plate, 16-Installation space, 17-Pad plate, 18-Filter I, 19-Filter II, 20-Exhaust fan, 21-Drying box, 22-Gap, 23-Ventilation hole, 24-Mesh cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper end," "lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figures 1 to 3 This utility model provides a technical solution:

[0027] A testing device for an on-board charging gun includes a housing 1, the housing 1 being equipped with a sealed door 2, a charging pile socket 3 being installed on the door 2, the first and second detection points of the charging pile socket 3 being connected in series with a leakage current protection switch 9 located inside the housing 1 to form a load closed circuit, the third and fourth detection points of the charging pile socket 3 being respectively connected to a CP line test light 5 and a CC line test light 6 located on the door 2, and both the CP line test light 5 and the CC line test light 6 being connected to a fifth detection point of the charging pile socket 3.

[0028] like Figure 1 As shown, the first detection point is indicated by the number ① in the diagram. The second to fifth detection points are represented or illustrated in the same way. The first and second detection points serve as the connection points for the L (live) wire and N (neutral) wire, respectively. A current transformer is connected in series on the L (live) wire inside the enclosure 1 to detect the current value. The L and N wires inside the enclosure 1 are connected to a residual current device (RCD). An ammeter and a voltmeter are installed inside the enclosure 1. The ammeter is connected to the load closed loop through the current transformer and is used to detect the current value of the load closed loop. The voltmeter is connected to the load closed loop to detect the voltage value of the load closed loop.

[0029] Specifically, the ammeter and voltmeter are located on either side of the leakage current protection switch 9. The leakage current protection switch 9 is also connected in series with a load bulb, which is mounted on the door 2. A DC charging port 4 is installed on the door 2, and this DC charging port 4 is connected to the load closed loop via a DYC module and an AC-DC module. The load closed loop is connected to a load output port (not shown in the figure), which is located on the enclosure 1. The DYC module is a DC control module. When powered on, the AC power in the load closed loop is converted to DC power by the AC-DC module. The DYC module then adjusts the output DC voltage and current to meet the needs of different loads. The DYC module and the AC-DC module are installed inside the enclosure 1 (not shown in the figure).

[0030] Specifically, the third and fourth test points of the electrical outlet socket 3 are connected to a switch, a resistor, and a capacitor. The switch and resistor are connected in parallel and then in series with the capacitor. The switch is located on the door 2, and the resistor and capacitor are located inside the enclosure 3. The third test point is connected to the CP line test light 5 via the PE (ground) wire, and the fourth test point is connected to the CC line test light 6 via a wire. The CP line test light 5 and the CC line test light 6 are connected in parallel to the fifth test point.

[0031] Specifically, the door 2 is equipped with an AC voltage and current display screen 7 and a DC voltage and current display screen 8. The current and voltage values ​​detected by the ammeter and voltmeter are displayed on the AC voltage and current display screen 7, while the DC voltage and current values ​​after the AC power is converted to DC power by the AC-DC module are displayed on the DC voltage and current display screen 8. A microcontroller module 10 is also installed inside the door 2.

[0032] The detection device of this utility model has a charging gun connected to a function box, which contains a leakage protection device (K1 and K2 relays) and a power supply control device (PWM controller). K1 and K2 relays are used to connect to the first and second detection points respectively, and the detection point of the power supply control device is connected to the fifth detection point.

[0033] Working principle:

[0034] When the charging gun is connected to the CC and CP terminals (the vehicle-side charging gun unlock button pops up), the third detection point will detect a resistance between the charging gun and ground equal to the sum of the resistance of capacitor RC and resistor R4. When this resistance is equal to the sum of the resistance of capacitor RC and resistor R4, the charging gun is considered to be in a semi-connected state. When the third detection point detects a resistance between the charging gun and ground equal to the sum of the resistance of capacitor RC, the charging gun is considered to be in a connected state (the CC line test light illuminates).

[0035] The above method determines the vehicle identification plug status by the voltage change at the third detection point on the CC line. This does not include the vehicle charging equipment's identification of the vehicle's connection status. The working principle of the vehicle charging equipment's identification of the vehicle's connection status will be introduced below:

[0036] 1. When the charging gun is connected to the CC / CP terminal, the voltage at the first detection point changes from 12V to... The charging station detects that the charging gun is connected. The S1 switch of the charging station switches to the 12V PWM wave signal terminal. The signal at the first detection point changes from a 9V DC voltage signal to a 9V PWM signal, indicating that the charging equipment has entered the ready state (CP line test light is on).

[0037] 2. When the vehicle detects that the charging gun is connected, the charger will determine the needs of the power battery and whether the power battery has any charging faults. If there are no faults, the charger will close the S3 relay to indicate that the vehicle is ready and request charging.

[0038] The first detection at the charging pile is a 9V PWM square wave signal. When the charging pile detects this signal, it confirms that the vehicle is ready and requests charging. The charging pile closes the K1 and K2 relay switches, and the power from the L1 and N terminals of the charging pile enters the vehicle, thereby charging the vehicle. The load light bulb illuminates.

[0039] Switches S1 and S3 are electronic switches, which can be constructed using electronic components such as diodes and transistors. Switch S3 automatically closes to control the charging gun relays (K1, K2), allowing 220V voltage to flow. Once the voltage arrives, the load bulb illuminates, and the CP line test light illuminates when certain conditions are met. The CC line test light also illuminates when certain conditions are met. The switch automatically closes after the CC line condition is met, followed by the CP line condition.

[0040] The testing device of this utility model can detect the quality of the charging gun, determine whether the charging gun has voltage output, and whether the output voltage can carry the load. When the charging gun is connected to the CC or CP terminal, the voltage of the CC charging gun connection line can be detected, or the voltage of the CP charging line can be confirmed.

[0041] The testing device of this utility model has sealing strips installed on all four sides of the inner door frame of the door 2, so that the door 2 can be sealed with the box body 1 when closed. The door 2 is also equipped with a door lock, which locks tightly with the box body 1 after the seal is closed. There is an air inlet and an air outlet on one side of the box body 1, and the air inlet and air outlet are respectively covered with filter screen I18 and filter screen II19. There is also a fresh air structure inside the box body 1.

[0042] The fresh air structure includes an exhaust fan 20 and an L-shaped partition 11. The exhaust fan 20 is installed inside the housing 1 at the air inlet. The L-shaped partition 11 is installed inside the housing 1, covering the exhaust fan 20. When the door 2 is closed, the L-shaped partition 11, the housing 1, and the door 2 form a channel. A partition 12 is located within this channel, with its bottom installed at the bottom of the housing 1. The top of the partition 12 is spaced from the bottom of the partition 11. The partition 12 divides the channel into two serpentine channels, I 13 and II 14. A pad 17 is installed at the bottom of the partition 11, with a gap 22 between the pad 17 and the bottom of the housing.

[0043] When fresh air needs to be exchanged inside the housing 1, the exhaust fan 20 is controlled to rotate. Outside air is drawn into channel I 13 through the air inlet, then enters gap 22 through channel II 14, and then enters housing 1 through vent 23, thus providing fresh air exchange for electrical components such as leakage protection switch 9 inside housing 1. Finally, the air is blown out through the air outlet to complete the air exchange cycle.

[0044] This utility model, when installed outdoors, can perform dust removal on the fresh air entering the housing 1. Because filter screen I 18 and filter screen II 19 are installed at the air inlet and outlet respectively, dust and particulate matter can be filtered through these screens. The filter screens can be made of metal or plastic and are bolted to the housing 1 for easy cleaning or replacement. A pair of parallel mesh plates 15 are installed in the channel, with one mesh plate 15 fixed to the top of the partition plate 12. The two mesh plates 15 form an installation space 16, which is used to insert a plate-and-frame air filter (such as one with non-woven fiber felt as the filter material). The plate-and-frame air filter is used for secondary dust filtration, providing good filtration and preventing large particles of dust or particulate matter from entering the housing 1 and affecting the internal components.

[0045] This invention, when installed outdoors, can dehumidify the fresh air entering the housing 1 during the rainy season when the outside humidity is high. A drying box 21 is installed on the pad 17, and a mesh cover 24 is installed on the drying box 21. Alternatively, ventilation holes 23 are provided on both sides of the pad 17. The drying box 21 is located between the ventilation holes 23. The drying box 21 contains a certain amount of desiccant (such as calcium chloride). When fresh air enters the housing 1 through the gap 22 and the ventilation holes 23, the moisture in the air is absorbed by the desiccant because the drying box 21 is close to the ventilation holes 23, thus preventing excessive humidity in the housing 1.

[0046] Of course, there is another possibility: in addition to the ventilation holes 23 on both sides of the pad 17, the pad 17 also has ventilation holes 23 in the middle. The drying box 21 covers the ventilation hole 23 in the middle, and the bottom of the drying box 21 also has small holes. In this way, when fresh air enters the box 1 from the gap 22 through the ventilation holes 23, especially the ventilation hole 23 in the middle, it can be dehumidified first. Then, since the drying box 21 is closer to the ventilation hole 23, the moisture in the air will also be absorbed by the desiccant, thus improving the dehumidification effect.

[0047] In this invention, a slit (not shown in the figure) is provided at the bottom of the housing 1, and the slit is located inside channel I13. The slit is used to prevent liquid from entering the housing 1, allowing the liquid to drain directly downwards through the slit. This invention also allows the installation of a temperature sensor inside the housing 1, which communicates with a microcontroller module 10. If the temperature inside the housing 1 exceeds a preset value, the microcontroller module 10 controls the exhaust fan 20 to rotate, thereby ventilating the inside of the housing 1.

[0048] This invention provides an installation space 16 for inserting and replacing a plate-and-frame air filter (similar to a car air conditioning filter). When the replacement cycle is reached, simply open the door 2 to remove and replace the plate-and-frame air filter. This also facilitates better dispensing of the desiccant in the drying box 21; simply open the mesh cover 24 to replace it.

[0049] The parts not described herein are existing technologies.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detection device for a vehicle-mounted charging gun, characterized in that, The utility model relates to a charging pile socket (3) is installed on the sealed box door (2) of the box (1), and the first and second detection points of the charging pile socket (3) form a load closed loop with the leakage protection switch (9) in the box (1) in series, and the third and fourth detection points of the charging pile socket (3) are connected with the CP line test lamp (5) and the CC line test lamp (6) on the box door (2) respectively, and the CP line test lamp (5) and the CC line test lamp (6) are connected with the fifth detection point of the charging pile socket (3).

2. The detection device for the vehicle-mounted charging gun according to claim 1, characterized in that, The box (1) is equipped with an ammeter and a voltmeter, the ammeter is connected to the load closed loop through a current transformer and is used to detect the current value of the load closed loop, and the voltmeter is connected to the load closed loop and is used to detect the voltage value of the load closed loop.

3. The detection device for the vehicle-mounted charging gun according to claim 2, characterized in that, The ammeter and the voltmeter are respectively located on the two sides of the leakage protection switch (9), and the leakage protection switch (9) is further connected with a load bulb in series, and the load bulb is installed on the box door (2).

4. The detection device for the vehicle-mounted charging gun according to claim 1, characterized in that, The box door (2) is provided with a direct-current charging port (4), and the direct-current charging port (4) is connected to the load closed loop through an AC-DC module.

5. The detection device for the vehicle-mounted charging gun according to claim 1, characterized in that, The load closed loop is connected with a load output port, and the load output port is located on the box (1).

6. The detection device for a vehicle-mounted charging gun according to claim 1, characterized in that, The third and fourth detection points of the charging pile socket (3) are connected with a switch, a resistor and a capacitor resistor, the switch and the resistor are connected in parallel and are connected with the capacitor resistor in series, the switch is located on the box door (2), and the resistor and the capacitor resistor are located in the box (1).

7. The detection device for a vehicle-mounted charging gun according to claim 1, characterized in that, The box door (2) is provided with an alternating voltage and current display screen (7) and a direct-current voltage and current display screen (8).

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