Electric vehicle DC charging pile signal line integrated port and electric vehicle charging pile

Abstract

The application discloses a signal line integrated port of a direct-current charging pile of an electric vehicle and the direct-current charging pile of the electric vehicle, and belongs to the technical field of electric vehicle charging piles.The signal line integrated port of the direct-current charging pile of the electric vehicle comprises a low-voltage port of a first plug row and a high-voltage port of a second plug row, wherein the low-voltage port of the first plug row is connected with an emergency stop signal line, a detection point 1 signal line, an electronic lock signal line, an S+ S- communication line, K1 K2 state feedback signal lines, K3 K4 state feedback signal lines, an electric energy metering pulse signal line and a signal ground line; and the high-voltage port of the second plug row is connected with K1 K2 contactor front-end voltage measurement lines, K1 K2 contactor rear-end voltage measurement lines, L1 / L2 / L3 / N and a three-hole power socket (L / N / PE). The application can realize the integration of signal lines in the production, maintenance and detection of the direct-current charging pile of the electric vehicle, improves the safety and reliability of the detection process, and improves the detection and maintenance efficiency. The method is simple, easy to implement and convenient to use.

Description

Technical Field

[0001] The present invention relates to the field of electric vehicle charging piles, and in particular to an electric vehicle DC charging pile signal line integrated port and an electric vehicle charging pile. Background Art

[0002] Testing of DC charging piles for electric vehicles is a crucial component of the production process of the new energy vehicle charging industry and a key support for the strategic development of new energy vehicles. It plays an increasingly important role in the healthy development of the new energy vehicle industry. Currently, the production and ownership of electric vehicles have maintained rapid growth, and the demand for charging piles is also increasing. Safe and reliable charging piles are the foundation and guarantee of electric vehicle travel, which places increasingly high demands on the testing of electric vehicle charging piles. However, the testing process for electric vehicle charging piles is currently not reliable and complete enough, and there is room for further improvement in testing equipment and technology.

[0003] Taking China as an example, since 2015, the currently effective series of inspection standards for electric vehicle charging piles have been updated or released. They are:

[0004] NB / T 33001-2018 "Conditions for Off-Board Conductive Chargers for Electric Vehicles"

[0005] NB / T 33002-2018 Technical Requirements for AC Charging Piles for Electric Vehicles

[0006] NB / T 33008.1-2018 "Electric Vehicle Charging Equipment Inspection and Test Specification Part 1: Off-board Chargers"

[0007] NB / T 33008.2-2018 "Electric Vehicle Charging Equipment Inspection and Test Specification Part 2: AC Charging Piles"

[0008] GB / T 34657.1-2017 Electric Vehicle Conductive Charging Interoperability Test Specification Part 1: Power Supply Equipment

[0009] GB / T 34657.2-2017 Electric Vehicle Conductive Charging Interoperability Test Specification Part 2: Vehicle

[0010] Q / GDW 11784—2017 Electric Vehicle Charging Equipment Field Test Specification

[0011] GB / T 18487.1-2015 Electric Vehicle Conductive Charging System Part 1: General Requirements

[0012] Currently, electric vehicle charging pile testing equipment primarily consists of a DC power supply, a digital multimeter, a programmable DC load, a display screen, an oscilloscope, an industrial computer, an AC / DC analog control box, an AC load, a DC load, and a test interface. When testing the performance parameters of a charging pile, testing agencies must connect wires to the internal circuitry to receive signals. However, this currently requires opening the cabinet door and extracting the complex internal signal lines one by one to connect to the external testing equipment. This method of extracting the test signal lines and the working power supply from the charging pile requires specialized personnel to remove and connect the wires, making the process complex. It also increases the testing workload, reduces the reliability and safety of the charging pile's operation, and increases the risks of on-site safety operations and daily maintenance costs. Summary of the Invention

[0013] In order to solve the problems of low efficiency, heavy workload, weak safety and reliability of the detection method in the prior art, the present invention provides an electric vehicle DC charging pile signal line integrated port, including: multiple low-voltage ports, multiple high-voltage ports;

[0014] The multiple low-voltage ports are integrated into the first socket strip and fixedly connected to the low-voltage signal line of the electric vehicle charging pile;

[0015] The multiple high-voltage ports are integrated into the second socket row and fixedly connected to the high-voltage signal line of the electric vehicle charging pile.

[0016] Preferably, the first socket strip and the second socket strip are both arranged inside the electric vehicle DC charging pile body.

[0017] Preferably, the low-voltage port of the first socket strip and the fixedly connected low-voltage signal line of the electric vehicle DC charging pile include: an emergency stop signal line, a detection point 1 signal line, an electronic lock signal line, an S+ S- communication line, a K1K2 status feedback signal line, a K3K4 status feedback signal line, an electric energy meter pulse signal line, and a signal ground line.

[0018] Preferably, the high-voltage port of the second socket row and the fixedly connected high-voltage signal line of the electric vehicle DC charging pile include: K1K2 contactor front-end voltage measurement line, K1K2 contactor rear-end voltage measurement line, L1 / L2 / L3 / N, and a three-hole power socket.

[0019] Preferably, the low-pressure port of the first socket row and the high-pressure port of the second socket row are at a height of 1.2 m to 1.6 m from the ground.

[0020] Preferably, the high-voltage port of the second socket row is at least 10 cm away from the outer wall of the electric vehicle DC charging pile body.

[0021] Preferably, the low-voltage port adopts a plug-in PCB terminal or a wire-to-wire wall-penetrating plug-in terminal.

[0022] Preferably, the first socket strip adopts a 16-position 5.08mm terminal block.

[0023] Preferably, the second socket row uses 8 4mm banana sockets and 1 10A three-hole power socket.

[0024] Based on the same inventive concept, the present invention further provides a DC charging pile for electric vehicles, comprising a charging pile body, a signal line, and a signal line integrated port for a DC charging pile for electric vehicles provided by the present invention, wherein the signal line and the signal line integrated port are located in the charging pile body;

[0025] The signal lines include a plurality of low-voltage signal lines and a plurality of high-voltage signal lines, and the integrated port is fixedly connected to the plurality of low-voltage signal lines and the plurality of high-voltage signal lines respectively.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention provides an integrated signal line port for a DC charging station for electric vehicles, comprising: multiple low-voltage ports and multiple high-voltage ports; the multiple low-voltage ports are integrated into a first socket strip and fixedly connected to the low-voltage signal lines of the electric vehicle charging station; the multiple high-voltage ports are integrated into a second socket strip and fixedly connected to the high-voltage signal lines of the electric vehicle charging station. This method enables integrated signal line routing during the production, maintenance, and testing of DC charging stations for electric vehicles, improving the safety and reliability of the testing process and increasing the efficiency of testing and maintenance. The method is simple and easy to use.

[0028] 2. The present invention provides an integrated signal line port for a DC charging pile of an electric vehicle. Aiming at the production, maintenance and testing of DC charging piles of electric vehicles, a testing technology for integrated signal line ports is invented, which realizes the integration of DC charging pile signal lines by using port strips of different bit numbers and styles. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the integrated port for the signal line of the electric vehicle DC charging pile of the present invention;

[0030] Figure 2 This is a schematic diagram showing the connection principle between the integrated port of the present invention and the DC charging pile signal line. DETAILED DESCRIPTION

[0031] To address the low efficiency, high workload, and weak safety and reliability of existing testing methods, this paper proposes a signal line integrated port technology for electric vehicle charging piles. This technology differs from previous testing techniques in that it integrates the signal leads of the charger's low-voltage and high-voltage ports into a dedicated operation and maintenance port within the charging pile using a terminal block. A three-hole power outlet is used to connect the internal operation and maintenance power supply, achieving one-stop rapid testing capabilities with "port-specific, testing-facilitated." Furthermore, this signal line integrated port technology for electric vehicle charging piles significantly enhances the safety and reliability of electric vehicle charging pile inspection and maintenance, improves inspection and maintenance efficiency, reduces operational processes and difficulty, saves companies costs, and offers significant economic benefits.

[0032] In order to better understand the present invention, the present invention is further described below with reference to the accompanying drawings and examples.

[0033] Example 1: An integrated signal line port for a DC charging station for an electric vehicle, comprising: a plurality of low-voltage ports and a plurality of high-voltage ports and leads;

[0034] The multiple low-voltage ports are integrated into the first socket strip and connected to the low-voltage signal line of the electric vehicle DC charging pile;

[0035] The multiple high-voltage ports are integrated into the second socket row and connected to the high-voltage signal line of the electric vehicle DC charging pile.

[0036] 1 DC charging pile signal line integrated port

[0037] 1.1 Detection lead requirements

[0038] According to the specifications and requirements of standards such as GB / T18487.1-2015 "Electric Vehicle Conductive Charging System Part 1: General Requirements" and NB / T33008.1-2018 "Electric Vehicle Charging Equipment Inspection and Test Specification Part 1: Off-Board Chargers", during the operation and maintenance, on-site inspection and type testing of DC charging piles, the test signal lines that need to be drawn from the DC charging pile are shown in Table 1 below.

[0039] Table 1 DC charging pile operation and inspection lead requirements

[0040]

[0041] According to the DC charging control pilot circuit schematic diagram in the standard GB / T18487.1-2015 "Electric Vehicle Conductive Charging System Part 1: General Requirements" (see attached Figure 2 ), the above DC charging pile lead demand table is obtained through analysis. Figure 2The connection diagram for the DC charging control pilot circuit and the integrated port is drawn based on the logical relationship. The table indicates the lead name, number, voltage level, and purpose. Leads 1-7 are on the low-voltage side, including two each of the emergency stop signal line, detection point 1 signal line, electronic lock signal line, S+S- communication line, K1K2 status feedback signal line, and K3K4 status feedback signal line. Lead 8 is reserved as a spare. Leads 9-12 are on the high-voltage side, including two each of the K1K2 contactor front-end voltage measurement line and the K1K2 contactor rear-end voltage measurement line. Lead 11 is four L1 / L2 / L3 / N lines. Lead 12 is the three-pin power outlet (L / N / PE) on the high-voltage side. A1 is the fuse, A2 is the current measurement line, A3 is the bleeder circuit, and A4 is the voltage measurement line.

[0042] 1.2 Detection port selection

[0043] Depending on wiring requirements, use a 16- or 20-position terminal block to centrally route low-voltage signal lines, reserving 2 or 6 positions for backup. Use an 8-position 5.08mm terminal block or eight 4mm banana jacks to route the charging pile's high-voltage input and output. Use a 10A DIN-rail three-hole power outlet to route the 220V operation and maintenance power supply. When selecting the right connector, ensure that the low-voltage and high-voltage ports are of different sizes to prevent mis-insertion and miswiring.

[0044] (1) Low-pressure port selection

[0045] The low voltage port uses pluggable terminals. The pile side uses a socket and the detection equipment side uses a plug. There are two options to choose from: Option 1 uses pluggable PCB terminal blocks (3.81MM spacing), see Figure 1 Solution 2 uses wire-to-wire through-wall plug-in terminals (5.08mm pitch), see Figure 2 .

[0046] (2) High-pressure port selection

[0047] Considering the electrical clearance and creepage distance, the high voltage port uses a 4mm banana socket or a 5.08mm pluggable terminal. The pile side uses a socket, and the detection equipment side uses a plug. There are two options to choose from: Option 1 uses a line-to-line through-wall pluggable terminal (5.08mm spacing), see Figure 2 Solution 2 uses 4mm banana sockets, with 8 banana sockets arranged in two rows.

[0048] (3) Operation and maintenance power supply selection

[0049] The operation and maintenance power supply uses a 10A DIN-rail three-hole socket. Currently, about 50% of chargers have three-hole sockets installed.

[0050] (IV) Location of low-pressure port and high-pressure port

[0051] The low-voltage port and high-voltage port are located inside the electric vehicle charging pile. The preferred location principle is to avoid causing additional personal electric shock risks and keep the high-voltage signal line as short as possible. For example, the high-voltage signal line should be at least 10 cm away from the outer wall of the cabinet. When affected by external forces, the risk of insulation damage is as small as possible. The height of the low-voltage port and the high-voltage port can be at any height of the cabinet, but it is best to be located between 1.2 meters and 1.6 meters from the ground to facilitate personnel to perform plugging and unplugging wiring operations.

[0052] Example 2:

[0053] The present invention also provides a DC charging pile for electric vehicles, comprising a charging pile body, signal lines in the charging pile body, and an integrated port for the DC charging pile signal lines of the electric vehicle provided in Example 1. The integrated port for the DC charging pile signal lines can be designed and installed inside the DC charging pile during the manufacturing stage, or can be installed inside the DC charging pile during the charging pile modification stage; the signal lines include multiple low-voltage signal lines and multiple high-voltage signal lines, and the integrated port is fixedly connected to the multiple low-voltage signal lines and the multiple high-voltage signal lines, respectively.

[0054] External detection equipment can be easily connected to the internal circuits and components of the DC charging pile using this invention, enabling detection sampling and signal processing, thereby improving the efficiency of the detection process. The integrated porting technology for electric vehicle charging pile signal lines enables a unified and standardized layout of the internal circuits of different DC charging pile models.

[0055] When a DC charging pile is delivered to a testing station or undergoing on-site testing, after inspecting the overall appearance of the charging pile, the staff only needs to open the cabinet door, locate the port described in the present invention, and, based on the test content, plug the test cable of the testing equipment into the integrated signal cable port. This quickly completes the connection between the testing equipment and the DC charging pile, and then initiates the test. The testing equipment can be powered directly by the three-hole voltage socket of the port described in the present invention, eliminating the need for an additional working power supply.

[0056] The electric vehicle DC charging pile signal line integrated port provided by the present invention can:

[0057] 1. The internal circuit design of the electric vehicle charging pile has been improved, and the circuit layout is clearer and more reasonable, which is convenient for professionals to carry out inspection and maintenance.

[0058] 2. The adoption of port technology has greatly improved the safety and reliability of DC charging pile equipment and ensured the requirements of safe operation.

[0059] 3. The present invention reduces the complexity of detection and maintenance and improves detection efficiency.

[0060] 4. The present invention can save costs for enterprises and improve economic benefits.

[0061] 5. The present invention is easy to promote, has low manufacturing and modification costs, and has broad application prospects, which can greatly promote the development of electric vehicle charging pile detection business.

[0062] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0063] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0065] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1A step that specifies a function in one or more boxes.

[0067] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. An integrated port for signal lines of a DC charging pile for electric vehicles, characterized in that: include: Multiple low-pressure ports, multiple high-pressure ports; The multiple low-voltage ports are integrated into the first socket strip and fixedly connected to the low-voltage signal line of the electric vehicle charging pile; The multiple high-voltage ports are integrated into the second socket row and fixedly connected to the high-voltage signal line of the electric vehicle charging pile; The first socket row and the second socket row are both arranged inside the DC charging pile body of the electric vehicle; The low-voltage signal lines of the electric vehicle DC charging pile fixedly connected to the low-voltage port of the first socket strip include: emergency stop signal line, detection point 1 signal line, electronic lock signal line, S+ S- communication line, K1K2 status feedback signal line, K3K4 status feedback signal line, electric energy meter pulse signal line, and signal ground line; The high-voltage port of the second socket row is fixedly connected to the high-voltage signal line of the electric vehicle DC charging pile, including: K1K2 contactor front-end voltage measurement line, K1K2 contactor rear-end voltage measurement line, L1 / L2 / L3 / N, and a three-hole power socket.

2. The electric vehicle DC charging pile signal line integrated port according to claim 1, characterized in that: The low-pressure port of the first socket row and the high-pressure port of the second socket row are located at a height of 1.2 m to 1.6 m from the ground.

3. The electric vehicle DC charging pile signal line integrated port according to claim 1, characterized in that: The high-voltage port of the second socket row is at least 10 cm away from the outer wall of the electric vehicle DC charging pile body.

4. The electric vehicle DC charging pile signal line integrated port according to claim 1, characterized in that: The low-voltage port adopts a plug-in PCB terminal or a line-to-line wall plug-in terminal.

5. The electric vehicle DC charging pile signal line integrated port according to claim 1, characterized in that: The first socket strip uses 16-position 5.08mm terminals.

6. The electric vehicle DC charging pile signal line integrated port according to claim 1, characterized in that: The second power strip uses 8 4mm banana sockets and 1 10A three-hole power socket.

7. A DC charging pile for electric vehicles, characterized in that: The electric vehicle DC charging pile comprises a charging pile body, a signal line and a signal line integrated port according to any one of claims 1 to 6, wherein the signal line and the signal line integrated port are located in the charging pile body; The signal lines include a plurality of low-voltage signal lines and a plurality of high-voltage signal lines, and the integrated port is fixedly connected to the plurality of low-voltage signal lines and the plurality of high-voltage signal lines respectively.

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