New energy automobile AC charging pile tester

Abstract

The utility model relates to a new energy automobile AC charging pile tester comprising a grounding detection switch, an electric leakage detection switch, a voltage conversion knob, a load button, a display module, a CP loop detection ship-shaped switch, an emergency stop button and a charging pile socket interface which are assembled outside the charging pile tester. The voltage transformation device, the load control device, the cooling device, the load device, the control panel and the circuit breaker are assembled in the charging pile tester. Detection of various test items can be carried out through one tester, and integration of test functions is realized. The system not only can complete conventional test items (such as grounding, electric leakage, overvoltage, undervoltage, overcurrent and the like), but also can test fault functions (such as test items for monitoring CP loop abnormity and PWM waveform abnormity and the like). And the test can be completed only through simple keys and knobs, so that the operation is simple and convenient, the professional requirement level of testers is reduced, and the test efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle charging pile testing technology, and in particular to a tester for AC charging piles of new energy vehicles. Background Technology

[0002] With the increasing emphasis placed on the safety and reliability of the charging process by the state, interoperability testing has become a key focus of on-site inspection work. The relevant standard GB / T 34657.1-2017 "Interoperability Test Specification for Conductive Charging of Electric Vehicles Part 1: Power Supply Equipment" has also been officially implemented. It is mainly used to evaluate the consistency of interoperability between electric vehicles and charging piles, and solves the chaotic situation of different standards being implemented in different parts of the country and interfaces not being compatible. It can effectively ensure that charging piles and electric vehicles can achieve safe and reliable docking and communication interaction.

[0003] Existing automatic testing devices for charging piles have the following shortcomings and problems:

[0004] (1) There are many on-site testing items for existing charging piles. Existing testing instruments (such as load boxes used for load testing) have limited functions and are expensive. At the same time, it is necessary to switch external devices for different testing items, which involves a lot of wiring, many testing steps, and cumbersome operation, requiring a high level of professional knowledge from the testing personnel.

[0005] (2) Existing charging pile field testers can only perform routine function tests. According to national standards, many fault functions cannot be tested, or multiple devices are required to perform tests, such as CP circuit abnormality and PWM waveform and duty cycle monitoring, which greatly affects the efficiency of testing. Utility Model Content

[0006] To address the problems of numerous testing devices, cumbersome operation, and low testing efficiency in existing technologies, this utility model provides a new energy vehicle AC charging pile tester, including a grounding detection switch, a leakage detection switch, a voltage conversion knob, a load button, a display module, a CP circuit detection rocker switch, an emergency stop button, and a charging pile socket interface mounted externally to the charging pile tester, and a transformer device, a load control device, a cooling device, a load device, a control board, and a circuit breaker mounted internally to the charging pile tester;

[0007] The grounding detection switch, the leakage detection switch, the load button, the display module, the emergency stop button, the charging pile socket interface, the transformer, the load control device, the cooling device, and the circuit breaker are all connected to the control board via internal circuits.

[0008] The transformer is also connected to the voltage conversion knob via an internal circuit.

[0009] The charging pile socket interface is connected to the charging pile device under test, and the charging pile socket interface is connected to the CP circuit detection rocker switch through an internal circuit.

[0010] The load control device is also connected to the load device and the circuit breaker via internal circuits.

[0011] Furthermore, the voltage conversion knob includes a first voltage conversion knob with an adjustable voltage range of 0 to 264V and a second voltage conversion knob with an adjustable voltage range of 0 to 456V.

[0012] Furthermore, the load device can be customized and combined for load value invocation.

[0013] Furthermore, the control board has interfaces such as USB and RS485.

[0014] Furthermore, the charging pile tester is divided into three partitions from top to bottom: partition one, partition two, and partition three. The transformer and control board are assembled in partition one; the load control device and circuit breaker are assembled in partition two; and the cooling device and load device are assembled in partition three.

[0015] Furthermore, the two side panels of the third partition have honeycomb-shaped holes, and the cooling device is fixed to the inner side of the two side panels of the third partition.

[0016] Furthermore, the internal circuit connections include cable connections and wire-to-board connections.

[0017] Compared with the prior art, this utility model has the following beneficial effects:

[0018] This invention integrates multiple testing functions into a single testing instrument, enabling the testing of various items. It can independently test individual items or perform simultaneous testing of multiple items. It can complete not only conventional tests (such as grounding, leakage, overvoltage, undervoltage, and overcurrent) but also tests for fault functions (such as CP circuit anomalies and PWM waveform anomaly monitoring). Furthermore, operation is simple, requiring only buttons and knobs, reducing the professional skill requirements for testing personnel and significantly improving testing efficiency. Simultaneously, the ability to combine and call up load devices by setting load values ​​greatly reduces the testing cost of individual items. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the external operation panel of an embodiment of the present utility model;

[0021] Figure 3 This is an internal structural diagram of an embodiment of the present utility model;

[0022] In the diagram: 1. Grounding detection switch; 2. Leakage detection switch; 3. Load button; 4. Display module; 5. CP circuit detection rocker switch; 6. Emergency stop button; 7. Charging pile socket interface; 8. Transformer; 9. Load control device; 10. Cooling device; 11. Load device; 12. Control board; 13. Circuit breaker; 14. First voltage conversion knob; 15. Second voltage conversion knob; 16. Isolation layer one; 17. Isolation layer two; 18. Isolation layer three. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "upper," "lower," "front," "rear," "top," "bottom," 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 this utility model and simplifying the description, and do not indicate or imply that the device or part 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 this utility model. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] A tester for AC charging piles of new energy vehicles, such as Figures 1-2 As shown, it includes: a grounding detection switch 1, a leakage current detection switch 2, a voltage conversion knob, a load button 3, a display module 4, a CP circuit detection rocker switch 5, an emergency stop button 6, and a charging pile socket interface 7, all mounted on the outside of the charging pile tester; and a transformer device 8, a load control device 9, a cooling device 10, a load device 11, a control board 12, and a circuit breaker 13, all mounted inside the charging pile tester.

[0026] The grounding detection switch 1, leakage current detection switch 2, load button 3, display module 4, emergency stop button 6, charging pile socket interface 7, transformer device 8, load control device 9, cooling device 10, and circuit breaker 13 are all connected to the control board 12 through internal circuits.

[0027] The transformer 8 is also connected to the voltage conversion knob via an internal circuit.

[0028] The charging pile socket interface 7 is connected to the charging pile device under test, and the charging pile socket interface 7 is connected to the CP circuit detection rocker switch 5 through an internal circuit.

[0029] The load control device 9 is also connected to the load device 11 and the circuit breaker 13 via internal circuits.

[0030] The control board 12 is the main control system of the charging pile tester and is connected to multiple components. It is responsible for transmitting various signals and test commands and processing data. The display module 4 displays various test results and indicators on the operation panel of the charging pile tester and displays the current status in real time. Parameters such as CP signal, PWM waveform and duty cycle are all processed by the control board 12 and then displayed on the display module 4.

[0031] By turning on the grounding detection switch 1 and the leakage detection switch 2, it is possible to detect whether the charging pile is properly grounded or has a leakage problem.

[0032] To accommodate charging piles with 220V single-phase AC and 380V three-phase AC voltages on the market, the voltage conversion knob includes a first voltage conversion knob 14 with an adjustable voltage range of 0-264V and a second voltage conversion knob 15 with an adjustable voltage range of 0-456V. During testing, if the charging pile under test has a 220V single-phase AC voltage, the first voltage conversion knob 14 is set to the desired voltage value; if the charging pile under test has a 380V three-phase AC voltage, the second voltage conversion knob 15 is set to the desired voltage value to achieve the voltage change. After receiving the command, the control board 12 completes the configuration of the test voltage through the transformer device 8 and the connected charging pile socket interface 7 to complete the test items, such as overvoltage and undervoltage.

[0033] In the testing of new energy vehicle charging piles, CP loop detection is an important test item for the communication and control signals between the charging pile and the vehicle. It is used to control the magnitude of the charging current and determine the charging status (such as unplugging the charging gun, plugging in the charging gun, charging preparation, charging start and charging stop).

[0034] The CP circuit detection rocker switch 5, charging pile socket interface 7, and control board 12 are interconnected, with control board 12 acquiring the CP signal in real time. The CP signal can be adjusted via the CP circuit detection rocker switch 5 to simulate different CP states: when the CP circuit detection rocker switch 5 is in the top position, CP=6, simulating normal charging; when the CP circuit detection rocker switch 5 is in the bottom position, CP=9, simulating charging pile plugging in but not charging; when the CP circuit detection rocker switch 5 is in the middle position, CP=0, simulating an abnormal CP signal state. The charging pile under test performs overvoltage, undervoltage, and leakage tests based on different CP signals.

[0035] In addition to conventional CP signal detection, the AC charging pile tester for new energy vehicles provided in this application also includes a CP anomaly test function to detect whether the charging pile under test has the function of automatically stopping when the CP signal is abnormal. If it cannot be disconnected according to the national standard, it can be disconnected in time and the test can be stopped by the emergency stop button 6 connected to the control board 12 to prevent damage to the charging pile under test and the charging pile tester.

[0036] Load testing refers to accurately measuring parameters such as output voltage, current, and power of a charging pile by simulating the charging process of an electric vehicle, in order to evaluate the performance and stability of the charging pile. Load button 3 is connected to control board 12, control board 12 is connected to load control device 9, and load control device 9 is connected to load device 11. During load testing, load button 3 sends the required load value to control board 12. Control board 12 processes the signal and sends the processed signal to load control device 9. Load control device 9 acts as a control switch, allocating and combining load values ​​according to requirements, and sending command signals to load device 11 to ultimately adjust the load value.

[0037] The load device 11 allows for customized and combined load values, and can be equipped with corresponding loads according to user requirements. In AC charging pile load testing, six common load values ​​are used: 3.5kW and 4.224kW (single-phase voltage) for working load and overcurrent detection load; 7kW and 8.448kW (single-phase voltage) for working load and overcurrent detection load; and 21kW and 25.344kW (three-phase voltage) for working load and overcurrent detection load. In this embodiment, the load button 3 has buttons corresponding to the six load values. The load device 11 has six independent 3.5kW and six 724kW loads, enabling the recall of any of the six commonly used load values. For example, if a 4.224kW load is required, the load control device 9 will activate one 3.5kW independent load and one 724kW independent load according to the command signal. The larger the load value of an independent load, the higher its unit price. Therefore, this application combines loads with low unit prices and small load values ​​to significantly reduce the testing cost of external load boxes.

[0038] In addition, after receiving the signal from the load button 3, the control board 12 transmits the command signal to the cooling device 10, and the cooling device 10 starts to operate, effectively preventing problems such as excessive load temperature and improving the safety of the test.

[0039] To prevent load equipment failure, the load control device 9 is also connected to the circuit breaker 13, which can promptly disconnect the power supply module of the charging pile under test and the charging pile tester motherboard when the load equipment fails, thus ensuring the safety of the test.

[0040] To facilitate data transmission and auxiliary testing, the control board 12 has interfaces such as USB and RS485. An external printer can be connected via USB to print test items and results. RS485 is currently the most commonly used serial communication interface, and external devices (such as electricity meters) can be connected through the RS485 interface.

[0041] like Figure 3 As shown, to optimize the division of structural functional areas, the charging pile tester is divided into three layers from top to bottom: layer one (16), layer two (17), and layer three (18). The transformer 8 and control board 12 are installed in layer one (16). The load control device 9 and circuit breaker 13 are installed in layer two (17). The cooling device 10 and load device 11 are installed in layer three (18).

[0042] To improve cooling efficiency, the two side panels of the third partition 18 have honeycomb-shaped holes, and the cooling device 10 is fixed to the inside of the two side panels of the third partition 18.

[0043] Internal circuit connections include cable connections and wire-to-board connections. The control board 12 is connected to the charging pile socket interface 7, the transformer 8, and the circuit breaker 13 using 6 square millimeter cables; the load control device 9 is connected to the load device 11 and the circuit breaker 13 using 6 square millimeter cables; the voltage conversion knob is connected to the transformer 8 using a 6 square millimeter cable. All other connections use wire-to-board connections.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of implementation of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and all such improvements and modifications should be covered within the protection scope of this utility model.

Claims

1. A new energy vehicle alternating current charging pile tester, characterized in that, The utility model relates to a charging pile tester, which comprises a ground detection switch (1), a leakage detection switch (2), a voltage conversion knob, a load button (3), a display module (4), a CP loop detection boat type switch (5), an emergency stop button (6) and a charging pile socket interface (7) arranged outside the charging pile tester, and a voltage conversion device (8), a load control device (9), a cooling device (10), a load device (11), a control board (12) and a circuit breaker (13) arranged inside the charging pile tester. The ground detection switch (1), the leakage detection switch (2), the load button (3), the display module (4), the emergency stop button (6), the charging pile socket interface (7), the voltage conversion device (8), the load control device (9), the cooling device (10) and the circuit breaker (13) are respectively connected to the control board (12) through internal circuits. The voltage conversion device (8) is further connected to the voltage conversion knob through an internal circuit. The charging pile socket interface (7) is connected to a charging pile device to be tested, and the charging pile socket interface (7) is connected to the CP loop detection boat type switch (5) through an internal circuit. The load control device (9) is further connected to the load device (11) and the circuit breaker (13) through internal circuits. The voltage conversion knob comprises a first voltage conversion knob (14) with an adjustable voltage range of 0-264 V and a second voltage conversion knob (15) with an adjustable voltage range of 0-456 V.

2. The new energy vehicle AC charging pile tester according to claim 1, characterized in that, The load device (11) can customize and combine the load value.

3. The new energy vehicle AC charging pile tester according to claim 1, characterized in that, The control board (12) has USB and RS485 interfaces.

4. The new energy vehicle AC charging pile tester according to claim 1, characterized in that, The charging pile tester is internally divided into a first layer (16), a second layer (17) and a third layer (18) from top to bottom; the voltage conversion device (8) and the control board (12) are arranged in the first layer (16); the load control device (9) and the circuit breaker (13) are arranged in the second layer (17); and the cooling device (10) and the load device (11) are arranged in the third layer (18).

5. The new energy vehicle AC charging pile tester according to claim 1, characterized in that, The two side panels of the third layer (18) have honeycomb holes, and the cooling device (10) is fixed to the inner side of the two side panels of the third layer (18).

6. The new energy vehicle AC charging pile tester according to claim 5, characterized in that, The internal circuit connection includes cable connection and line-to-board connection.

7. The new energy vehicle AC charging pile tester according to claim 1, characterized in that, ​

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