Test device for direct current charging pile

Abstract

The present disclosure relates to the technical field of new energy vehicles, and provides a testing device for a direct-current charging pile. The testing device for the direct-current charging pile comprises: a power supply connecting piece comprising a first high-voltage end, a first low-voltage end, a first ground end, a first connection confirmation end and a first data transmission end; a vehicle connecting piece comprising a second high-voltage end, a second low-voltage end, a second ground end, a second connection confirmation end and a second data transmission end; a conversion circuit connected between the power supply connecting piece and the vehicle connecting piece, the conversion circuit comprising a high-voltage line, a low-voltage line, a data line, a ground line, a first switch and a second switch, wherein: the data line is connected between the first data transmission end and the second data transmission end; the ground line is connected between the first ground end and the second ground end; the first switch is connected between the first connection confirmation end and a first resistor of the vehicle; and the second switch is connected between the second connection confirmation end and a second resistor of the direct-current charging pile.

Description

Technical Field

[0001] This disclosure relates to the field of new energy vehicle technology, and in particular to a testing device for a DC charging pile. Background Technology

[0002] With the development of technology, the pace of new energy vehicle updates is accelerating. In order to ensure the functionality of electric vehicles and other new energy vehicles, it is necessary to continuously conduct charging management tests during the early stages of vehicle testing.

[0003] Each DC charging management test requires unplugging and replugging the charging gun and scanning the QR code after charging is completed, which is a cumbersome process. At the same time, due to the large current and voltage required for DC charging, the DC charging gun is heavy and bulky, which wastes a lot of manpower, affects testing efficiency, and cannot meet the needs of actual work.

[0004] Improving the convenience of the testing process for DC charging piles is a pressing technical issue that needs to be addressed. Utility Model Content

[0005] In view of this, the present disclosure provides a testing device for DC charging piles to solve the technical problem of low convenience in testing DC charging piles in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this disclosure is:

[0007] This disclosure provides a testing device for a DC charging pile, comprising: a power supply connector for connecting to the DC charging pile, including a first high-voltage terminal, a first low-voltage terminal, and a first signal terminal, the first signal terminal including a first ground terminal, a first connection confirmation terminal, and a first data transmission terminal; a vehicle connector for connecting to a vehicle charging port, including a second high-voltage terminal, a second low-voltage terminal, and a second signal terminal, the second signal terminal including a second ground terminal, a second connection confirmation terminal, and a second data transmission terminal; and a conversion circuit connected between the power supply connector and the vehicle connector, the conversion circuit including a high-voltage line, a low-voltage line, a data line, and a ground line. The first switch and the second switch are configured as follows: a high-voltage line is connected between the first high-voltage terminal and the second high-voltage terminal; a low-voltage line is connected between the first low-voltage terminal and the second low-voltage terminal; a data line is connected between the first data transmission terminal and the second data transmission terminal; a ground line is connected between the first ground terminal and the second ground terminal; the first switch is connected between the first connection confirmation terminal and the first resistor of the vehicle, and the first resistor is connected between the first switch and the second ground terminal; the second switch is connected between the second connection confirmation terminal and the second resistor of the DC charging pile, and the second resistor is connected between the second switch and the first ground terminal.

[0008] In some embodiments, the high-voltage line, low-voltage line, and data line are disposed in the same cable, and the first switch and the second switch are integrated inside the vehicle connector.

[0009] In some embodiments, the conversion circuit is disposed inside the housing, and the power supply connector and vehicle connector are disposed at the ends of the housing, the housing including a plastic housing or a metal housing.

[0010] In some embodiments, the first switch and the second switch are rocker switches.

[0011] In some embodiments, the DC charging pile includes a third resistor and a fourth resistor, as well as a pile-end switch. The third resistor is connected between a first pull-up power supply and a first connection confirmation terminal. The pile-end switch is connected between a first ground terminal and the fourth resistor. The fourth resistor is connected between the pile-end switch and the first connection confirmation terminal.

[0012] In some embodiments, the vehicle includes a fifth resistor connected between the second pull-up power supply and the second connection confirmation terminal.

[0013] In some embodiments, the first switch and the second switch are electrically controlled switches, and the switching on and off of the electrically controlled switches is controlled by a host computer that is communicatively connected to the electrically controlled switches.

[0014] In some embodiments, the value of the first resistor is in the range of 970 ohms to 1030 ohms; and / or, the value of the second resistor is in the range of 970 ohms to 1030 ohms.

[0015] In some embodiments, the DC charging pile includes a power supply plug, the vehicle includes a vehicle socket, the power supply connector is a power supply socket adapted to the power supply plug, and the vehicle connector is a vehicle plug adapted to the vehicle socket.

[0016] In some embodiments, the DC charging pile includes a power socket, the vehicle includes a vehicle plug, the power connector is a power plug adapted to the power socket, and the vehicle connector is a vehicle socket adapted to the vehicle plug.

[0017] The beneficial effects of this disclosed embodiment compared with the prior art are: by setting a first switch between the first connection confirmation terminal and the second ground terminal, and setting a second switch between the second connection confirmation terminal and the first ground terminal, the insertion and removal of the charging gun can be simulated without removing the charging gun, thereby simplifying the testing process and improving testing efficiency during the testing of DC charging piles. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a circuit diagram of a test device for a DC charging pile provided in an embodiment of this disclosure;

[0020] Figure 2 This is a schematic diagram of the structure of a test device for a DC charging pile provided in an embodiment of this disclosure;

[0021] Figure 3 This is a schematic diagram of the structure of another DC charging pile testing device provided in an embodiment of this disclosure. Detailed Implementation

[0022] Embodiments of this disclosure will now be described more fully with reference to the accompanying drawings, in which examples are illustrated. However, embodiments of this disclosure may be implemented in many different forms and should not be construed as limited to the embodiments specifically set forth herein; rather, these embodiments are provided so that this disclosure will be exhaustive and complete, and will fully convey the concept of the embodiments to those skilled in the art, enabling them to implement the present invention. In the drawings, the same reference numerals denote the same elements, and therefore their descriptions will be omitted.

[0023] It should be understood that when an element is said to be connected to or connected to another element, the element can be directly connected to the other element, or there can be an intermediary element between them. Conversely, when an element is said to be directly connected to another element, there is no intermediary element.

[0024] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of this disclosure pertain. It should also be understood that terms, such as those defined in common dictionaries, shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and shall not be interpreted in an idealized or overly rigid sense unless expressly so defined herein.

[0025] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting of this disclosure. It should be understood that the terms “comprising,” “including,” and “having,” as used in this specification, indicate the presence of the described features, quantities, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, quantities, steps, operations, elements, components, and / or groups thereof.

[0026] In related technologies, the testing process of DC charging piles requires frequent plugging and unplugging of the charging gun. Therefore, a testing device that simulates plugging and unplugging of the charging gun can be developed, and the DC charging pile can be tested by operating the testing device.

[0027] When charging an electric vehicle, a power transmission connection, a low-voltage power transmission connection, and a communication connection are established between the charging station and the electric vehicle. The power transmission connection allows 380V high-voltage DC power to be input into the electric vehicle to provide power. The charging station and the electric vehicle achieve power transmission through the DC+ and DC- outputs of the high-voltage DC power supply. The low-voltage power transmission connection allows 12V low-voltage auxiliary DC power to be input into the electric vehicle.

[0028] The communication connection enables connection detection between the charging station and the electric vehicle. During communication, the charging station and the electric vehicle identify the signal status through the CC (control confirmation) signal. The CC signal is transmitted through the charging connection confirmation interface CC.

[0029] The charging station and the electric vehicle communicate via a charging connection confirmation interface (CC) and a protective ground wire (PE). The CC is primarily used for vehicle confirmation of the charging station; when the charging gun is inserted into the vehicle, the vehicle sends a signal via the CC indicating that it is ready to accept charging. The CC is crucial for ensuring safe and efficient charging. The PE protects the system from electric shock, ensuring user safety.

[0030] The technical solution of this disclosure changes the CC circuit, i.e. the connection confirmation circuit, where the charging connection confirmation interface CC is located, so that the AC charging pile testing device of this disclosure can simulate multiple states such as the charging gun being pulled out, reinserted, and charging paused, thereby simplifying the operation process and improving the testing efficiency to a certain extent.

[0031] To address the above technical problems, this disclosure provides a testing device for DC charging piles.

[0032] The testing apparatus for a DC charging pile according to an embodiment of the present disclosure will now be described in detail with reference to the accompanying drawings.

[0033] Figure 1 This is a circuit diagram of a test device for a DC charging pile provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of a test device for a DC charging pile provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of another DC charging pile testing device provided in this disclosure embodiment. The following is in conjunction with... Figures 1 to 3 Let's describe the testing apparatus for DC charging piles provided in the embodiments of this disclosure.

[0034] like Figure 1 The testing device for AC charging piles provided in this embodiment includes: a power supply connector connected to a DC charging pile, a vehicle connector connected to a vehicle charging port, and a conversion circuit connected between the power supply connector and the vehicle connector.

[0035] like Figure 1 As shown, the power supply connector includes a first high-voltage terminal, a first low-voltage terminal, and a first signal terminal. The first signal terminal includes a first ground terminal, a first connection confirmation terminal, and a first data transmission terminal. The first high-voltage terminal includes a high-voltage DC positive terminal 11 and a high-voltage DC negative terminal 12, corresponding to the positive DC+ and negative DC- of the high-voltage DC power supply, respectively. The first low-voltage terminal includes a low-voltage DC positive terminal 18 and a low-voltage DC negative terminal 19, corresponding to the positive A+ and negative A- of the low-voltage auxiliary power supply, respectively. The first signal terminal includes a first ground terminal 13, a first connection confirmation terminal, and a first data transmission terminal. The first ground terminal 13 is connected to the ground wire PE. The first connection confirmation terminal includes a vehicle-side connection confirmation terminal 16 and a charging pile-side connection confirmation terminal 17, corresponding to the vehicle-side charging connection confirmation interface CC1 and the charging pile-side charging connection confirmation interface CC2, respectively. The first data transmission terminal includes a charging communication high-level terminal 14 and a charging communication low-level terminal 15, corresponding to the charging communication CAN_H line S+ and the charging communication CAN_L line S-. The CAN_H line (S+) and the CAN_L line (S-) for charging communication are the data communication lines between the charging pile and the vehicle controller. S+ and S- are the 12 or 24 volt auxiliary power supplied from the charging pile to the vehicle.

[0036] like Figure 1 As shown, the vehicle connector includes a second high-voltage terminal, a second low-voltage terminal, and a second signal terminal. The second signal terminal includes a second ground terminal, a second connection confirmation terminal, and a second data transmission terminal. The second high-voltage terminal includes a high-voltage DC positive terminal 21 and a high-voltage DC negative terminal 22, corresponding to the positive DC+ and negative DC- of the high-voltage DC power supply, respectively. The second low-voltage terminal includes a low-voltage DC positive terminal 28 and a low-voltage DC negative terminal 29, corresponding to the positive A+ and negative A- of the low-voltage auxiliary power supply, respectively. The second signal terminal includes a second ground terminal 23, a second connection confirmation terminal, and a second data transmission terminal. The second ground terminal 23 is connected to the ground wire PE. The first connection confirmation terminal includes a vehicle-side connection confirmation terminal 26 and a charging pile-side connection confirmation terminal 27, corresponding to the vehicle-side charging connection confirmation interface CC1 and the charging pile-side charging connection confirmation interface CC2, respectively. The first data transmission terminal includes a charging communication high-level terminal 24 and a charging communication low-level terminal 25, corresponding to the charging communication CAN_H line S+ and the charging communication CAN_L line S-.

[0037] like Figure 1As shown, the conversion circuit is connected between the power supply connector and the vehicle connector. The conversion circuit includes a high-voltage line, a low-voltage line, a data line, a ground line, a first switch, and a second switch. The high-voltage line is connected between the first high-voltage terminal and the second high-voltage terminal; the low-voltage line is connected between the first low-voltage terminal and the second low-voltage terminal; the data line is connected between the first data transmission terminal and the second data transmission terminal; the ground line is connected between the first ground terminal and the second ground terminal; the first switch S1 is connected between the first connection confirmation terminal and the first resistor R4, and the first resistor is connected between the first switch and the second ground terminal; the second switch S2 is connected between the second connection confirmation terminal and the second resistor R3, and the second resistor is connected between the second switch and the first ground terminal. The first resistor is a component on the vehicle, and the second resistor is a component on the DC charging pile.

[0038] The first switch S1 is the on / off switch for the CC1 circuit containing CC1, and the second switch S2 is the on / off switch for the CC2 circuit containing CC2. Both switches can be rocker switches, which are generally manually controlled and relatively simple to operate. CC1 is used at the charging pile end to identify the connection status between the charging gun and the charging port, and CC2 is used at the vehicle end to identify the connection status between the charging port and the charging outlet.

[0039] In this embodiment, the opening and closing of the CC1 circuit is controlled by a first switch, and the opening and closing of the CC2 circuit is controlled by a second switch. The closing and opening operations control the voltage values ​​detectable by detection points 1 and 2 in the circuit, thereby simulating the identification of the DC charging gun connection status at the charging pile end and the vehicle end. Using the technical solution of this embodiment, the opening and closing of the CC1 circuit can be controlled, changing the resistance value and voltage in the circuit to simulate the DC charging gun insertion status detected at the charging pile end; similarly, the opening and closing of the CC2 circuit can be controlled, changing the resistance value and voltage in the circuit to simulate the DC charging gun insertion status detected at the vehicle end.

[0040] The testing device for the DC charging pile provided in this embodiment is equivalent to an adapter between the charging socket at the charging pile end and the charging socket at the vehicle end. The circuit design of this adapter follows the schematic diagram of the DC charging safety protection system in the GBT18487.1-2023 standard. The form of the power supply connector is designed according to the form of the connectors for the AC charging pile and the vehicle. When the AC charging pile provides a power plug and the vehicle provides a vehicle socket, the power supply connector is a power socket adapted to the power plug, and the vehicle connector is a vehicle plug adapted to the vehicle socket. When the DC charging pile provides a power socket and the vehicle provides a vehicle plug, the power supply connector is a power plug adapted to the power socket, and the vehicle connector is a vehicle socket adapted to the vehicle plug.

[0041] like Figure 1As shown, during DC charging, the charging station detects the voltage in the entire circuit via detection point 1 of the CC1 circuit. When the charging gun is not inserted, switch S is normally closed in the CC1 circuit, and resistors R1 and R2 are connected in series. The 12V pull-up voltage provided by detection point 1 is divided, and only 6V can be detected. During insertion, switch S is open, leaving only resistor R1 in the CC1 circuit, and the voltage detected by detection point 1 returns to 12V. In the latter half of insertion, switch S is closed, but before the charging gun is fully inserted and completely connected to the vehicle, resistors R1 and R2 resume series connection, and detection point 1 identifies a voltage of 6V. After the charging gun is fully inserted, the CC1 circuit is also connected to the vehicle. Resistors R1 and R2 are connected in series and then in parallel with resistor R4. At this time, detection point 1 detects a 4V voltage and feeds this feedback to the charging station controller, i.e., the charging equipment controller. Therefore, when the charging station controller receives feedback that the CC1 circuit voltage is 4V, it confirms that the DC charging gun is fully connected.

[0042] In this embodiment, a first switch S1 is added to the CC1 circuit. After the adapter connects the charging pile and the vehicle, opening the first switch S1 interrupts the CC1 circuit. The charging pile controller detects a voltage of 6V in the circuit, indicating that the DC charging gun is not plugged in. Closing the first switch S1 connects the CC1 circuit, and the charging pile controller detects a voltage of 4V in the circuit, indicating that the DC charging gun is fully connected. Therefore, switch S1 can control the parallel connection of resistors R1, R2, and R4, simulating the plugged-in and unplugged-in states received by the charging pile controller. This eliminates the repetitive steps of plugging and unplugging the gun, simplifying the DC charging operation process.

[0043] In some embodiments, the value of the first resistor is in the range of 970 ohms to 1030 ohms; and / or, the value of the second resistor is in the range of 970 ohms to 1030 ohms.

[0044] In some embodiments, the DC charging pile includes a third resistor and a fourth resistor, as well as a pile-end switch (S). The third resistor (R1) is connected between the first pull-up power supply U1 and the first connection confirmation terminal. The pile-end switch is connected between the first ground terminal and the fourth resistor (R2). The fourth resistor is connected between the pile-end switch and the first connection confirmation terminal. The vehicle includes a fifth resistor (R5), which is connected between the second pull-up power supply U2 and the second connection confirmation terminal.

[0045] The third resistor has a value ranging from 970 ohms to 1030 ohms; and / or, the fourth resistor has a value ranging from 970 ohms to 1030 ohms. The fifth resistor has a value ranging from 970 ohms to 1030 ohms. The first and second pull-up power supplies can both be 12V.

[0046] like Figure 1As shown, during DC charging, the vehicle-side controller detects the voltage in the entire circuit through detection point 2 of the CC2 circuit. When the charging gun is not plugged in, the pull-up voltage of U2 is 12V. The CC2 circuit only has resistor R5, so detection point 2 can only detect 12V voltage. When the charging gun is fully connected, resistor R3 is added to the CC2 circuit for voltage division. At this time, the voltage detected by detection point 2 is only half of the pull-up voltage, that is, the 12V pull-up voltage detection point 2 can only detect 6V voltage. Based on this, the feedback is sent to the vehicle-side controller, i.e., the vehicle charging controller. When the vehicle-side controller receives feedback that the voltage at detection point 2 is 6V, it confirms that the DC charging gun is fully connected.

[0047] In this embodiment, a second switch S2 is added to the CC2 circuit. After the adapter connects the charging pile and the vehicle, opening the second switch S2 interrupts the CC2 circuit. The voltage in the vehicle-side control detection circuit is 12V, indicating that the DC charging gun is not plugged in. Closing the second switch S2 connects the CC2 circuit, and the voltage in the charging pile controller detection circuit is half of the pull-up voltage, i.e., the nominal value of 6V, indicating that the DC charging gun is fully connected. Therefore, the second switch S2 can control the parallel connection of resistors R5 and R3 in the CC2 circuit, simulating the plugged-in and unplugged-in states received by the vehicle-side controller. This eliminates the repetitive steps of actually plugging and unplugging the charging gun, simplifying the DC charging operation process.

[0048] This adapter controls the on / off state of the two circuits by adding switches to the CC1 and CC2 circuits, simulating the removal and reinsertion of the charging gun. This optimizes the repeated plugging and unplugging of the charging gun during DC charging management testing, simplifies the DC charging process, saves manpower, and improves testing efficiency.

[0049] like Figure 2 As shown, in one embodiment, the power supply connector 202 and the vehicle connector 203 are connected by a cable 201. The high-voltage line, low-voltage line, and data line are disposed in the same cable 201. The first switch and the second switch are integrated inside the vehicle connector 203. The two ends of the cable are fixedly connected to the power supply connector 202 and the vehicle connector 203 respectively by welding, and then insulated using heat-shrinkable insulating sleeves and insulating tape.

[0050] like Figure 3As shown, in one embodiment, the conversion circuit is disposed inside the housing 301, and the power supply connector 302 and the vehicle connector 303 are disposed at the ends of the housing. The power supply connector 302, the vehicle connector 303, the conversion circuit, and the housing are integrated into one unit. The housing can be a plastic housing or a metal housing, and is not limited thereto. Integrating the power supply connector 302, the vehicle connector 303, the conversion circuit, and the housing into one unit can reduce the cable portion and integrate the on / off control of the connection confirmation circuit and the control guidance circuit into the entire adapter, thereby making it more portable.

[0051] In this embodiment, the first switch and the second switch are electrically controlled switches, and the on / off state of the electrically controlled switches is controlled by a host computer that is communicatively connected to the electrically controlled switches. The host computer can control the on / off state of the electrically controlled switches according to human-machine interaction signals or automatic test programs, thereby improving the automation level of the test process.

[0052] According to the DC charging pile testing device provided in the embodiments of this disclosure, by setting a first switch between the first connection confirmation terminal and the second ground terminal, and setting a second switch between the second connection confirmation terminal and the first ground terminal, the insertion and removal of the charging gun can be simulated without removing the charging gun, thereby simplifying the testing process and improving testing efficiency during the testing of the DC charging pile.

[0053] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A testing device for a direct current charging pile, characterized in that, The testing device for the DC charging pile includes: A power supply connector for connecting to the DC charging pile includes a first high-voltage terminal, a first low-voltage terminal, and a first signal terminal. The first signal terminal includes a first ground terminal, a first connection confirmation terminal, and a first data transmission terminal. A vehicle connector for connecting to a vehicle charging port includes a second high-voltage terminal, a second low-voltage terminal, and a second signal terminal. The second signal terminal includes a second ground terminal, a second connection confirmation terminal, and a second data transmission terminal. A conversion circuit is connected between the power supply connector and the vehicle connector. The conversion circuit includes a high-voltage line, a low-voltage line, a data line, a ground line, a first switch, and a second switch, wherein: The high-voltage line is connected between the first high-voltage end and the second high-voltage end. The low-voltage line is connected between the first low-voltage terminal and the second low-voltage terminal. The data cable is connected between the first data transmission end and the second data transmission end. The ground wire is connected between the first ground terminal and the second ground terminal; The first switch is connected between the first connection confirmation terminal and the first resistor of the vehicle, and the first resistor is connected between the first switch and the second ground terminal; The second switch is connected between the second connection confirmation terminal and the second resistor of the DC charging pile, and the second resistor is connected between the second switch and the first ground terminal.

2. The testing device of the direct current charging pile according to claim 1, characterized in that, The high-voltage line, the low-voltage line, and the data line are disposed in the same cable, and the first switch and the second switch are integrated inside the vehicle connector.

3. The testing device of the direct current charging pile according to claim 1, characterized in that, The conversion circuit is disposed inside the housing, and the power supply connector and the vehicle connector are disposed at the ends of the housing. The housing may be a plastic housing or a metal housing.

4. The testing device of the direct current charging pile according to claim 1, characterized in that, The first switch and the second switch are rocker switches.

5. The testing device of the direct current charging pile according to claim 1, characterized in that, The DC charging pile includes a third resistor, a fourth resistor, and a pile-end switch. The third resistor is connected between the first pull-up power supply and the first connection confirmation terminal. The pile-end switch is connected between the first ground terminal and the fourth resistor. The fourth resistor is connected between the pile-end switch and the first connection confirmation terminal.

6. The testing device of the direct current charging pile according to claim 1, characterized in that, The vehicle includes a fifth resistor connected between the second pull-up power supply and the second connection confirmation terminal.

7. The testing device of the direct current charging pile according to claim 1, characterized in that, The first switch and the second switch are electrically controlled switches, and the on / off state of the electrically controlled switches is controlled by a host computer that is communicatively connected to the electrically controlled switches.

8. The testing device of a direct current charging pile according to any one of claims 1 to 7, characterized in that, The first resistor has a value range of 970 ohms to 1030 ohms; and / or, the second resistor has a value range of 970 ohms to 1030 ohms.

9. The testing device of a direct current charging pile according to any one of claims 1 to 7, characterized in that, The DC charging pile includes a power supply plug, the vehicle includes a vehicle socket, the power supply connector is a power supply socket adapted to the power supply plug, and the vehicle connector is a vehicle plug adapted to the vehicle socket.

10. The testing device of a direct current charging pile according to any one of claims 1 to 7, characterized in that, The DC charging pile includes a power socket, the vehicle includes a vehicle plug, the power connector is a power plug adapted to the power socket, and the vehicle connector is a vehicle socket adapted to the vehicle plug.

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