Charging pile conduction background noise verification system and EMC test system

Abstract

The utility model provides a charging pile conduction background noise verification system and an EMC test system, including: a charging pile, a signal simulator, a resistive load, a conduction interference test receiver and a darkroom; the charging pile is connected to the signal simulator, the resistive load and the conduction interference test receiver, the charging pile, the signal simulator and the conduction interference test receiver are located outside the darkroom, and the resistive load is located inside the darkroom. The present application adopts a resistive load in the noise verification system, which can eliminate the conduction interference of the vehicle itself. At the same time, the present application adopts the form of a power line filter to solve the interference problem from the charging pile itself transmitted along the power line, and suppresses such conduction interference outside the EMC test environment, so as not to affect the test result misjudgment of the tested product.

Description

Technical Field

[0001] The utility model relates to an EMC testing system, in particular to a charging pile conduction background noise verification system and an EMC testing system. Background Art

[0002] When conducting the conducted interference test (CE test, also known as interference voltage test, which is one of the contents of EMC test) of the vehicle-side charging port along the charging line, it is necessary to ensure that the conducted interference generated by the charging pile itself along the charging line is as small as possible so as not to affect the test results on the vehicle side. In actual testing, the conducted interference level of the charging pile cannot be verified when the actual vehicle is connected. It is necessary to apply a vehicle simulator, that is, a power load and a signal simulator, to the output end of the charging pile so that the charging pile can be identified as a normal vehicle, thereby ensuring the normal output of the charging pile. The power load must be a pure resistive load to ensure that the load itself does not generate conducted interference, so that it can be ensured that only the interference from the charging pile is measured. On the other hand, the signal of the charging pile should also have normal interactive work, and the high-frequency interference generated by the signal line may be coupled to the charging line through space. However, the signal simulator itself will generate a lot of high-frequency interference. Therefore, in order not to affect the test of conducted interference on the charging line, the problem of high-frequency interference generated by the signal line needs to be solved. Utility Model Content

[0003] In view of the defects in the prior art, the purpose of the utility model is to provide a charging pile conducted background noise verification system and an EMC test system.

[0004] According to the utility model, a charging pile conduction background noise verification system is provided, comprising: a charging pile, a signal simulator, a resistive load, a conduction interference test receiver and a darkroom;

[0005] The charging pile is connected to a signal simulator, a resistive load and a conducted interference test receiver. The charging pile, the signal simulator and the conducted interference test receiver are located outside the darkroom, and the resistive load is located inside the darkroom.

[0006] Preferably, the charging pile is connected to a power filter, and the power filter is connected to the resistive load;

[0007] The power supply filter is located outside the darkroom.

[0008] Preferably, a ground interface board and an artificial power supply network are arranged in the darkroom;

[0009] The charging pile is connected to the ground interface board and the artificial power network and then connected to the resistive load.

[0010] Preferably, the radio frequency port of the artificial power network is connected to the conducted disturbance test receiver via a coaxial cable.

[0011] Preferably, a control room is arranged outside the darkroom, and the conducted disturbance test receiver is arranged in the control room.

[0012] Preferably, a shielding body is provided around the darkroom and shielding is performed by the shielding body.

[0013] Preferably, the charging pile is configured as an AC charging pile;

[0014] The output end of the AC charging pile includes: a CP signal end, a CC signal end and an AC power output end;

[0015] The CP signal terminal and the CC signal terminal are connected to a signal simulator, and the AC power supply output terminal is connected to the power supply filter.

[0016] Preferably, the charging pile is configured as a DC charging pile;

[0017] The output end of the DC charging pile includes: a CAN signal end, a CC1 / CC2 signal end, an A+ / A- signal end and a DC power supply output end;

[0018] The CAN signal terminal, the CC1 / CC2 signal terminal and the A+ / A- signal terminal are connected to a signal simulator, and the DC power supply output terminal is connected to the power supply filter.

[0019] Preferably, a fan is provided at the resistive load.

[0020] Preferably, CP is a control guide line, CC, CC1 / CC2 are connection confirmation lines, CAN is a communication bus, and A+ / A- is a low-voltage auxiliary power supply positive / low-voltage auxiliary power supply negative.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The present application adopts a resistive load in the noise verification system, which can eliminate the conducted interference of the vehicle itself. At the same time, the present application adopts a power line filter to effectively solve the interference problem from the charging pile itself transmitted along the power line, and suppresses such conducted interference outside the EMC test environment, so as not to affect the test results of the tested product. Misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1This is the layout diagram of the conducted disturbance test of the AC charging pile;

[0025] Figure 2 This is the layout diagram of the conducted disturbance test of the DC charging pile;

[0026] As shown in the figure:

[0027] DETAILED DESCRIPTION

[0028] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0029] Example 1

[0030] like Figure 1-2 As shown, this embodiment includes: a charging pile 1, a signal simulator 2, a power filter 3, a shielding body 4, a ground interface board 5, an artificial power network 6, a resistive load 7, a control room 8, a conducted interference test receiver 9 and a darkroom 10; the charging pile 1 is connected to the signal simulator 2 and the power filter 3, and the power filter 3 is successively connected to the ground interface board 5, the artificial power network 6 and the resistive load 7; the RF port of the artificial power network 6 is connected to the conducted interference test receiver 9 through a coaxial cable.

[0031] The charging pile 1, the signal simulator 2 and the power filter 3 are located outside the darkroom 10, and the ground interface board 5, the artificial power network 6 and the resistive load 7 are located inside the darkroom 10. A control room 8 is set outside the darkroom 10, and a conducted disturbance test receiver 9 is set inside the control room 8.

[0032] The wall or the periphery of the wall of the darkroom 10 is shielded by a shielding body 4 , and a fan is arranged at the resistive load 7 .

[0033] In one embodiment, the charging pile 1 is configured as an AC charging pile; the output end of the AC charging pile includes: a CP signal end, a CC signal end, and an AC power output end, the CP signal end and the CC signal end are connected to a signal simulator 2, and the AC power output end is connected to a power filter 3.

[0034] In one embodiment, the charging pile 1 is configured as a DC charging pile; the output end of the DC charging pile includes: a CAN signal end, a CC1 / CC2 signal end, an A+ / A- signal end, and a DC power supply output end, the CAN signal end, the CC1 / CC2 signal end, and the A+ / A- signal end are connected to a signal simulator 2, and the DC power supply output end is connected to a power filter 3.

[0035] In order to ensure that the charging pile works normally with the vehicle or vehicle simulator, the power line at the power output end of the present application enters the EMC test environment (such as a darkroom 10) through a power filter 3 or a photoelectric converter, and the signal simulator 2 connected to the signal line at the signal end is arranged outside the darkroom 10, thereby preventing the interference transmitted along the power line or signal line from affecting the test results of the normal product under test.

[0036] Example 2

[0037] Example 2 is a preferred example of Example 1.

[0038] like Figure 1 As shown in the figure, the layout diagram of the conducted disturbance test of the AC charging pile is as follows:

[0039] AC charging pile: There are two outputs, one is the CP signal end and the CC signal end, which are connected to the signal simulator 2 through the signal line to realize handshake, safety and other detections; the other is the AC power output end, which enters the darkroom 10 through the power filter 3. After entering the darkroom 10 from the power filter 3, it reaches the ground interface board 5 (CP board), and then the power line of the ground interface board 5 is connected to the input end of the artificial power network 6 (LISN) on the ground through the wire, and the output end of the artificial power network 6 is connected to the resistive load 7. If it is a single-phase power supply, select different ports of the resistive load 7 according to the power size, and no overload phenomenon should occur; if it is a three-phase load, pay attention to the three-phase balance of the power of the resistive load 7. The RF port of the artificial power network 6 is connected to the conducted interference test receiver 9 in the control room 8 through a coaxial cable. The conducted interference test receiver 9 is a device known in the art for conducted interference scanning testing, so that the entire test system is connected.

[0040] After ensuring that the connection is correct, turn on the output of the charging pile 1, use a multimeter to measure the voltage of the resistive load 7 to ensure that it is consistent with the set parameters, and turn on the fan of the resistive load 7 for heat dissipation. The test engineer uses the conducted disturbance test receiver 9 in the control room 8 to start the conducted disturbance scanning test according to the set frequency range and save the test results.

[0041] like Figure 2 As shown in the figure, the conducted disturbance test layout of the DC charging pile is as follows:

[0042] DC charging pile: The output is 4 channels, 1-3 channels are CAN signal terminal, CC1 / CC2 signal terminal, A+ / A- signal terminal, respectively, which are connected to the signal simulator 2 through the signal line to realize handshake, safety, control, monitoring and other communication and detection; the 4th channel is the DC power output terminal, which enters the darkroom 10 through the power filter 3. After entering the darkroom 10 from the power filter 3, it reaches the ground interface board 5 (CP board), and then the power line of the ground interface board 5 is connected to the input end of the artificial power network 6 (LISN) on the ground through the wire, and the output end of the artificial power network 6 is connected to the resistive load 7. The DC power supply has only positive and negative levels. Different ports of the resistive load 7 are selected according to the power size, and overload cannot occur. The RF port of the artificial power network 6 is connected to the conducted interference test receiver 9 in the control room 8 through a coaxial cable, so that the entire test system is connected.

[0043] After ensuring that the connection is correct, turn on the output of the charging pile 1, use a multimeter to measure the voltage of the resistive load 7 to ensure that it is consistent with the set parameters, and turn on the fan of the resistive load 7 for heat dissipation. The test engineer uses the conducted disturbance test receiver 9 in the control room 8 to start the conducted disturbance scanning test according to the set frequency range and save the test results.

[0044] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A charging pile conduction background noise verification system, characterized in that: include: A charging pile (1), a signal simulator (2), a resistive load (7), a conducted interference test receiver (9), and a darkroom (10); The charging pile (1) is connected to a signal simulator (2), a resistive load (7) and a conducted disturbance test receiver (9); the charging pile (1), the signal simulator (2) and the conducted disturbance test receiver (9) are located outside the darkroom (10); and the resistive load (7) is located inside the darkroom (10).

2. According to the charging pile conduction background noise verification system of claim 1, it is characterized by: The charging pile (1) is connected to a power filter (3), and the power filter (3) is connected to the resistive load (7); The power supply filter (3) is located outside the darkroom (10).

3. The charging pile conduction background noise verification system according to claim 1 is characterized in that: A ground interface board (5) and an artificial power supply network (6) are arranged in the darkroom (10); The charging pile (1) is connected to a ground interface board (5) and an artificial power supply network (6), and then connected to the resistive load (7).

4. The charging pile conduction background noise verification system according to claim 3 is characterized in that: The radio frequency port of the artificial power supply network (6) is connected to the conducted disturbance test receiver (9) via a coaxial cable.

5. The charging pile conduction background noise verification system according to claim 1, characterized in that: A control room (8) is arranged outside the darkroom (10), and the conducted disturbance test receiver (9) is arranged inside the control room (8).

6. The charging pile conduction background noise verification system according to claim 1, characterized in that: A shielding body (4) is provided on the peripheral side of the darkroom (10) and shielding is performed by the shielding body (4).

7. The charging pile conduction background noise verification system according to claim 2, characterized in that: The charging pile (1) is configured as an AC charging pile; The output end of the AC charging pile includes: a CP signal end, a CC signal end and an AC power output end; The CP signal end and the CC signal end are connected to a signal simulator (2), and the AC power supply output end is connected to the power supply filter (3).

8. The charging pile conduction background noise verification system according to claim 2, characterized in that: The charging pile (1) is configured as a DC charging pile; The output end of the DC charging pile includes: a CAN signal end, a CC1 / CC2 signal end, an A+ / A- signal end and a DC power supply output end; The CAN signal terminal, the CC1 / CC2 signal terminal and the A+ / A- signal terminal are connected to a signal simulator (2), and the DC power supply output terminal is connected to the power supply filter (3).

9. The charging pile conduction background noise verification system according to claim 1, characterized in that: A fan is arranged at the resistive load (7).

10. An EMC test system, characterized in that: A charging pile conducted background noise verification system as described in any one of claims 1 to 9 is adopted.

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