Charging pile safety test device

Abstract

The utility model discloses a safety test device for a charging pile. The safety test device comprises a test host, a safety test instrument, a tool plate and four high-voltage relays, the tool plate is provided with a control chip and a plurality of relay driving circuits, and each relay driving circuit is connected with and controls one high-voltage relay; the test host is connected with the safety test instrument and the control chip; the OUTPUT end of the safety test instrument is electrically connected with one end of the first high-voltage relay and one end of the second high-voltage relay; the other end of the first high-voltage relay is connected to an ACin end of a charging pile power supply input live wire or zero wire; the other end of the second high-voltage relay is connected to an AC out end of a power output live wire or zero wire of the charging pile; the DRIVER + and the SENSE + of the safety test instrument are connected with the Gin end of the charging pile power supply input grounding end; dRIVER-and ENSE-of the safety test instrument are connected with one end of a third high-voltage relay and one end of a fourth high-voltage relay, and the other end of the third high-voltage relay is connected to an AC out end of a power output live wire or zero wire of the charging pile; and the other end of the fourth high-voltage relay is connected with the Gout end of the power output grounding end of the charging pile. According to the utility model, the safety test of the new energy electric vehicle charging pile in each area is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of charging equipment, and in particular to a charging pile safety test device. Background Art

[0002] At present, on-site AC and DC charging pile detection equipment usually carries two sets of equipment for separate testing. In the prior art, the on-site detection platform for AC charging piles consists of an on-site detection device for AC charging piles and an AC load box. Through the cooperation of the on-site calibration device for AC charging piles and the AC load box, it is possible to test the electric energy metering error test, the electrical parameter error (voltage, current, power, harmonics, etc.) test, etc.; by controlling the AC charging pile calibration device to simulate the electric vehicle control guidance function, the charging control compatibility test is performed; by reading the power of the three-phase standard meter in the standby state, the power consumption of the AC charging pile is tested; the insulation resistance test is performed through the insulation resistance test module; by cooperating with the calibration device manually, general inspections, human-computer interaction functions, display function tests, metering function tests, card payment function tests, locking device function tests, etc. are performed.

[0003] In the prior art, the on-site detection platform of DC charging piles is composed of a DC charger on-site detection test device and a DC load. Through the cooperation of the DC charger on-site detection test device and the DC load, it is possible to perform power metering error test, output voltage error test, voltage limiting characteristic test, current limiting characteristic test, charger output test, ripple coefficient test, etc.; through the BMS simulator in the DC charger on-site detection device, it is possible to perform BMS communication link layer test, BMS communication application layer test, BMS communication protocol specification test, etc.; through the cooperation of the detection device and manual work, it is possible to test the display function test, input function test, connection abnormality test, emergency stop function test, charging mode test, etc.; through the oscilloscope to detect the output of the charger, it is possible to perform ripple coefficient test, etc.

[0004] Traditional working methods result in many manual actions, easy fatigue, easy omissions, high costs, and careless manual operation that can easily lead to hidden dangers of personal safety accidents; in particular, they are inefficient and costly in manpower. Summary of the invention

[0005] The purpose of the utility model is to provide a charging pile safety testing device.

[0006] The technical solution adopted by the utility model is:

[0007] A charging pile safety test device comprises a test host, a safety test instrument, a tool board and four high-voltage relays; the tool board is provided with a control chip and a multi-channel relay drive circuit connected to the control chip, each relay drive circuit is respectively connected to and controls a high-voltage relay; the test host is respectively electrically connected to the safety test instrument and the control chip;

[0008] The OUTPUT end of the high-voltage output of the safety test instrument is electrically connected to one end of the first high-voltage relay and the second high-voltage relay respectively; the other end of the first high-voltage relay is connected to the ACin end as the live wire or neutral wire of the charging pile power input; the other end of the second high-voltage relay is connected to the ACout end as the live wire or neutral wire of the charging pile power output;

[0009] The large current output terminal DRIVER+ and the large current detection terminal SENSE+ of the safety test instrument are connected together to the Gin terminal which is the ground terminal of the charging pile power input; the low potential terminal DRIVER- and the low potential detection terminal SENSE- of the safety test instrument are connected together to one end of the third high-voltage relay and the fourth high-voltage relay, and the other end of the third high-voltage relay is connected to the ACout terminal which is the live wire or neutral wire of the charging pile power output; the other end of the fourth high-voltage relay is connected to the Gout terminal which is the ground terminal of the charging pile power output.

[0010] Furthermore, the test host is electrically connected to the safety test instrument and the control chip through the serial port respectively.

[0011] Furthermore, the safety test instrument adopts Chroma Electronics' comprehensive safety tester-19032.

[0012] Specifically, the OUTPUT terminal of the safety test instrument, that is, the high potential terminal of the high voltage output, is a high potential output terminal and is usually a high voltage output, so this test terminal is very dangerous. When the DANGER light is on, it means that there is a high voltage output, so do not touch it. The high current output terminal DRIVER+ of the safety test instrument is used for high current output during ground resistance testing, with a maximum current of 30A. The high current detection terminal SENSE+ of the safety test instrument is used for the detection or feedback of the voltage across the object under test during ground resistance testing. The low potential detection terminal SENSE- of the safety test instrument is used for the detection or feedback of the voltage across the object under test during ground resistance testing; it is used as the low end of the loop during withstand voltage or insulation testing; and it is used as the leakage current loop end during leakage testing. The low potential terminal DRIVER- of the safety test instrument is the shared test terminal, which forms a loop with the current output terminal during resistance testing, with a maximum current of 30A. At the same time, this terminal is almost equal to the ground terminal of the shell and must be connected to the ground.

[0013] Furthermore, the tool board and four high-voltage relays are arranged in a fixture box to form a safety test fixture.

[0014] Furthermore, a plurality of connection holes are provided on the fixture box, and charging interface sockets corresponding to the ACin end, ACout end, Gin end, and Gout end are respectively installed on four of the connection holes so as to be matched with the device under test.

[0015] Furthermore, the charging interface socket is detachable, and different charging interface sockets are paired with charging interfaces in different countries or regions.

[0016] Furthermore, the tool board is provided with an external power interface, and the external power supply provides power to the tool board through the external power interface. At least one connection hole on the fixture box is provided with a power terminal electrically connected to the external power interface.

[0017] The utility model adopts the above technical solution, the test instrument is connected to the tool board, and the control chip on the tool board cooperates with multiple high-voltage relay switches to switch the wiring action. It is controlled and displayed by the test host (PC); the tool board, high-voltage relay, power box, and charging interface sockets of various regions (North America, Europe, China, Japan) form a fixture box; the utility model facilitates the safety (high-voltage grounding) test of relevant automobile (new energy electric vehicle) charging piles in various regions; it greatly improves efficiency and safety, and saves standing time and manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods;

[0019] Figure 1 This is a schematic diagram of the circuit principle of a charging pile safety test device of the utility model;

[0020] Figure 2 This is a wiring diagram of a safety test instrument of a charging pile safety test device of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the fixture box of the utility model. Implementation

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0023] like Figures 1 to 3 As shown in one, the utility model discloses a charging pile safety test device, which includes a test host, a safety test instrument, a tool board and four high-voltage relays; the tool board is provided with a control chip and a multi-channel relay drive circuit connected to the control chip, each relay drive circuit is respectively connected to and controls a high-voltage relay; the test host is respectively electrically connected to the safety test instrument and the control chip;

[0024] The OUTPUT end of the high-voltage output of the safety test instrument is electrically connected to one end of the first high-voltage relay k1 and the second high-voltage relay k2 respectively; the other end of the first high-voltage relay k1 is connected to the ACin end as the live wire or neutral wire of the charging pile power input; the other end of the second high-voltage relay k2 is connected to the ACout end as the live wire or neutral wire of the charging pile power output;

[0025] The large current output terminal DRIVER+ and the large current detection terminal SENSE+ of the safety test instrument are connected together to the Gin terminal which is the ground terminal of the charging pile power input; the low potential terminal DRIVER- and the low potential detection terminal SENSE- of the safety test instrument are connected together to one end of the third high-voltage relay k3 and the fourth high-voltage relay k4, and the other end of the third high-voltage relay k3 is connected to the ACout terminal which is the live wire or neutral wire of the charging pile power output; the other end of the fourth high-voltage relay k4 is connected to the Gout terminal which is the ground terminal of the charging pile power output.

[0026] Furthermore, the test host is electrically connected to the safety test instrument and the control chip through the serial port respectively.

[0027] Furthermore, the safety test instrument adopts Chroma Electronics' comprehensive safety tester-19032.

[0028] Specifically, the OUTPUT terminal of the safety test instrument, that is, the high potential terminal of the high voltage output, is a high potential output terminal and is usually a high voltage output, so this test terminal is very dangerous. When the DANGER light is on, it means that there is a high voltage output, so do not touch it. The high current output terminal DRIVER+ of the safety test instrument is used for high current output during ground resistance testing, with a maximum current of 30A. The high current detection terminal SENSE+ of the safety test instrument is used for the detection or feedback of the voltage across the object under test during ground resistance testing. The low potential detection terminal SENSE- of the safety test instrument is used for the detection or feedback of the voltage across the object under test during ground resistance testing; it is used as the low end of the loop during withstand voltage or insulation testing; and it is used as the leakage current loop end during leakage testing. The low potential terminal DRIVER- of the safety test instrument is the shared test terminal, which forms a loop with the current output terminal during resistance testing, with a maximum current of 30A. At the same time, this terminal is almost equal to the ground terminal of the shell and must be connected to the ground.

[0029] Furthermore, the tool board and four high-voltage relays are arranged in a fixture box to form a safety test fixture.

[0030] Furthermore, a plurality of connection holes are provided on the fixture box, and charging interface sockets corresponding to the ACin end, ACout end, Gin end, and Gout end are respectively installed on four of the connection holes so as to be matched with the device under test.

[0031] Furthermore, the charging interface socket is detachable, and different charging interface sockets are paired with charging interfaces in different countries or regions.

[0032] Furthermore, the tool board is provided with an external power interface, and the external power supply provides power to the tool board through the external power interface. At least one connection hole on the fixture box is provided with a power terminal electrically connected to the external power interface.

[0033] Specifically, as a feasible implementation method, the product of the utility model performs the following process steps when undergoing safety testing:

[0034] (1) The test host reads the product's barcode and determines the specific model of the product based on the barcode length and the first two characters of the barcode;

[0035] (2) Relays K1, K2, K3, and K4 on the control tool board are all disconnected;

[0036] (3) Control the relay K2 on the tool board to close and test the insulation resistance and leakage current between the live wire and the neutral wire at the power output end and the ground wire at the power output end;

[0037] (4) Relay K4 on the control tool board is closed, and the resistance between the ground wire at the power input end and the ground wire at the power output end is tested;

[0038] (5) Switch the instrument to channel 21. The high-voltage test instrument program channel parameter specifications are preset to constant current 25A, 0.1Ω;

[0039] (6) Conducting tests to determine whether the test value is within the specification by comparing it with the set value;

[0040] (7) Switch the instrument to channel 53, and the channel parameter specifications are preset: 1. DC500V, 10 MΩ; 2. AC2000V, 10mA;

[0041] (8) Test to determine whether the insulation resistance and leakage current test values ​​of the product are OK (insulation resistance is greater than 10 MΩ, leakage current is less than 10mA);

[0042] (9) Relay K1 on the tool board is closed to test the insulation resistance and leakage current between the live wire and the neutral wire at the power input end and the ground wire at the power output end;

[0043] (10) Relay K2 on the tool board is disconnected;

[0044] (11) Test to determine whether the insulation resistance and leakage current test values ​​of the product are OK (insulation resistance is greater than 10 MΩ, leakage current is less than 10mA);

[0045] (12) Relays K1 and K3 on the tool board are closed. K2 and K4 are disconnected. The insulation resistance and leakage current tests are performed between the live wire and the neutral wire at the power input end and the live wire and the neutral wire at the power output end.

[0046] (13) Determine whether the insulation resistance and leakage current test values ​​of the product are OK (insulation resistance is greater than 10 MΩ, leakage current is less than 10mA);

[0047] (14) Relays K1, K2, K3, and K4 on the tool board are all disconnected;

[0048] (15) Upload the test results to the MES system of the test host.

[0049] The utility model adopts the above technical solution, the test instrument is connected to the tool board, and the control chip on the tool board cooperates with multiple high-voltage relay switches to switch the wiring action. It is controlled and displayed by the test host (PC); the tool board, high-voltage relay, power box, and charging interface sockets of various regions (North America, Europe, China, Japan) form a fixture box; the utility model facilitates the safety (high-voltage grounding) test of relevant automobile (new energy electric vehicle) charging piles in various regions; it greatly improves efficiency and safety, and saves standing time and manpower.

[0050] Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

Claims

1. A charging pile safety test device, characterized in that: It includes a test host, a safety test instrument, a tool board and four high-voltage relays; the tool board is provided with a control chip and a multi-channel relay drive circuit connected to the control chip, each relay drive circuit is respectively connected to and controls a high-voltage relay; the test host is respectively electrically connected to the safety test instrument and the control chip; The OUTPUT end of the high-voltage output of the safety test instrument is electrically connected to one end of the first high-voltage relay and the second high-voltage relay respectively; the other end of the first high-voltage relay is connected to the ACin end as the live wire or neutral wire of the charging pile power input; the other end of the second high-voltage relay is connected to the ACout end as the live wire or neutral wire of the charging pile power output; The large current output terminal DRIVER+ and the large current detection terminal SENSE+ of the safety test instrument are connected together to the Gin terminal which is the ground terminal of the charging pile power input; the low potential terminal DRIVER- and the low potential detection terminal SENSE- of the safety test instrument are connected together to one end of the third high-voltage relay and the fourth high-voltage relay, and the other end of the third high-voltage relay is connected to the ACout terminal which is the live wire or neutral wire of the charging pile power output; the other end of the fourth high-voltage relay is connected to the Gout terminal which is the ground terminal of the charging pile power output.

2. A charging pile safety test device according to claim 1, characterized in that: The test host is electrically connected to the safety test instrument and the control chip through the serial port respectively.

3. A charging pile safety test device according to claim 1, characterized in that: The safety test instrument used is Chroma's comprehensive safety tester -19032.

4. A charging pile safety test device according to claim 1, characterized in that: The tool board and four high-voltage relays are arranged in a fixture box to form a safety test fixture.

5. A charging pile safety test device according to claim 4, characterized in that: There are several connection holes on the fixture box, four of which are respectively installed with charging interface sockets corresponding to the ACin end, ACout end, Gin end, and Gout end, so as to connect with the device under test.

6. A charging pile safety test device according to claim 5, characterized in that: The charging port socket is detachable, and different charging port sockets are paired with charging ports in different countries or regions.

7. A charging pile safety test device according to claim 4, characterized in that: The tool board is provided with an external power supply interface, and the external power supply provides power to the tool board through the external power supply interface; at least one connection hole on the fixture box is provided with a power terminal electrically connected to the external power supply interface.

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