Comprehensive detector for alternating current charging system

Abstract

The invention provides a comprehensive detector for an alternating current charging system, and belongs to the field of charging pile detection devices, the comprehensive detector comprises a shell, a detection circuit is arranged in the shell, the front end of the shell is provided with an oscilloscope, a load, a JP1 plug-in connector, a JP2 plug-in connector, leading-out measuring terminals and a switch indicating device, the oscilloscope is connected with the JP1 plug-in connector and the JP2 plug-in connector through the leading-out measuring terminals, and the switch indicating device is connected with the load. The load and the switch indicating device are both connected with the leading-out measuring terminal, and the comprehensive detector detects state data of the charging gun and the vehicle-mounted charger by simulating the charging process of the electric vehicle. Whether the charging gun is damaged or not and which signal is output or not can be detected, accurate data are provided for next maintenance, related lines of the vehicle-mounted charger can be measured in a lossless mode by arranging the guiding and measuring terminal, and meanwhile the detection time is shortened.

Description

Technical Field

[0001] The present invention relates to the field of charging pile detection devices, and in particular to an AC charging system comprehensive detector. Background Art

[0002] Charging piles for new energy vehicles need to undergo comprehensive testing before leaving the factory, especially aging tests. However, there is no standard aging equipment in the existing technology. Instead, the charging piles are connected to electric vehicles, battery packs or heating resistors for heat dissipation. The shortcomings of these aging methods are obvious: 1. It is impossible to detect whether the charging timing of the charging pile is correct; 2. It is impossible to simulate the communication between the charging pile and the vehicle; 3. It is impossible to adjust the current according to different PWM duty cycles to allow charging piles of different power to age simultaneously; 4. Batch aging is impossible; 5. It is impossible to display and monitor the CP signal accuracy and waveform; 6. It is impossible to recycle and reuse electric energy, resulting in increased product costs; 7. It is impossible to collect data on aging charging piles and monitor the entire aging process.

[0003] The Chinese patent with announcement number CN108089083A discloses an AC charging pile detection system, which includes a power supply module, a calibration module, an energy feedback module, and a monitoring module. The device detects energy and needs to power the charging pile before it can perform signal detection. However, when there is a problem with the charging pile, there is often no signal or charging, and the detection speed is slow and the efficiency is low. In addition, the existing detection system cannot detect the charging gun and the on-board charger at the same time. When charging fails, it cannot be determined whether the problem is with the on-board charger or the charging gun. Therefore, it is necessary to design an AC charging system comprehensive detector. Summary of the Invention

[0004] The purpose of the present invention is to provide an AC charging system comprehensive detector to solve the technical problems that the existing AC charging system detection is complicated and cannot simultaneously determine the faults of the charging gun and the charger.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] The AC charging system comprehensive tester includes a shell with a detection circuit arranged inside the shell. The front end of the shell is provided with an oscilloscope, a load, a JP1 connector, a JP2 connector, lead-out measurement terminals and a switch indicating device. The oscilloscope is connected to the JP1 connector and the JP2 connector via the lead-out measurement terminals respectively, and the load and the switch indicating device are both connected to the lead-out measurement terminals. The comprehensive tester detects the status data of the charging gun and the on-board charger by simulating the electric vehicle charging process.

[0007] Furthermore, the JP1 connector is connected to the on-board charger, the JP2 connector is connected to the charging signal terminal of the vehicle, and is connected to the charging gun through the lead-out measurement terminal.

[0008] Furthermore, the load is a 220V light bulb, which is used to connect to the neutral wire and the live wire of the charging gun through the lead-out measurement terminal, and there is only one light bulb.

[0009] Furthermore, the switch indication device includes a CP indicator light, a resistor and a switch SW1. One end of the switch SW1 is connected to the PE line of the charging gun through a terminal, and the other end of the switch SW1 is connected to the CP end of the charging gun through a resistor and an indicator light. The two ends of the CP indicator light are respectively connected to the PE end of the charging gun and one end of the resistor.

[0010] Furthermore, the specific detection process is as follows: After the integrated detector is connected to the charging gun, the integrated detector controls the connection and disconnection of the charging gun CP line end and the internal response line of the integrated detector through the switch SW1. When the switch SW1 is closed, the charging gun CP line end is connected to the internal analog line of the integrated detector, giving the charging gun a charging request signal. At this time, the charging gun starts to work and outputs 220V AC voltage. The oscilloscope function of the integrated detector can test the analog signal of each terminal and display it on the oscilloscope. The user can view the waveform of each analog signal of the charging gun through the oscilloscope to determine whether the signal is normal. After the charging gun works, the 220V voltage emitted is transmitted to the 220V light bulb. The working condition of the light bulb can quickly reflect whether the output voltage of the charging gun is normal. At the same time, the oscilloscope can also display whether the 220V AC voltage of the charging gun is stable.

[0011] Connect the JP1 and JP2 connectors in series with the on-board charger control circuit, connect the connector in series with the vehicle's on-board charger control circuit, and lead it to the detection panel of the comprehensive tester. By leading out the measurement terminal, you can detect whether the signal of the on-board charger is normal, and realize simultaneous detection of the charging gun and the on-board charger.

[0012] Furthermore, the comprehensive tester collects the ignition signal voltage of the on-board charger through the IG line terminal in the JP2 connector, measures the voltage value through the oscilloscope voltage measurement function, and leads to the CAN bus terminal, which is convenient for using the oscilloscope of the comprehensive tester to measure the communication waveform between the vehicle and the charging gun.

[0013] Furthermore, the comprehensive tester is connected to the charging gun to first determine the performance status of the charging gun. According to the jumper function of the on-board charger system, by setting the test terminal, the relevant lines of the on-board charger can be measured non-destructively, while shortening the detection time.

[0014] Furthermore, the oscilloscope function integrates the detection of the charging system CP signal waveform, CAN network waveform, and line voltage with one plug and go, improving the efficiency of the detection process. It can detect whether the charging gun is damaged, which signal is faulty or has no output, and provide accurate data for the next step of maintenance.

[0015] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0016] The present invention simultaneously detects the charging gun and the on-board charger. When the vehicle cannot be charged, it may be that the charging gun or the on-board charger is faulty. The comprehensive detector can detect both and determine which one is faulty. It can also detect whether the charging gun is damaged and which signal is output or not, providing accurate data for the next maintenance. By setting the test terminal, the relevant circuits of the on-board charger can be measured non-destructively, while shortening the detection time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front-end structure of the comprehensive detector of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal detection circuit of the comprehensive detector of the present invention. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and by way of preferred embodiments. However, it should be noted that many of the details listed in this specification are merely provided to help the reader gain a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be practiced even without these specific details.

[0020] like Figure 1-2 As shown, the AC charging system integrated tester includes a housing with a detection circuit inside. The front end of the housing is equipped with an oscilloscope, a load, JP1 and JP2 connectors, lead-out measurement terminals, and a switch indicator. The oscilloscope is connected to the JP1 and JP2 connectors via the lead-out measurement terminals, respectively. The load and switch indicator are also connected to the lead-out measurement terminals. The integrated tester simulates the electric vehicle charging process to detect the status data of the charging gun and the on-board charger. The housing is configured as a rectangular parallelepiped, and the JP1 and JP2 connectors are provided with protruding plug connectors for easier connection.

[0021] In the embodiment of the present invention, the JP1 connector is connected to the on-board charger, the JP2 connector is connected to the charging signal terminal of the vehicle, and is connected to the charging gun through the lead-out measurement terminal.

[0022] In the embodiment of the present invention, Figure 2 As shown, the load is a 220V light bulb, which is used to connect the neutral wire and live wire of the charging gun through the lead-out measurement terminal. There is only one light bulb.

[0023] In an embodiment of the present invention, the switch indicating device includes a CP indicator light, a resistor and a switch SW1. One end of the switch SW1 is connected to the CP line of the charging gun, and the other end of the switch SW1 is connected to the PE line of the charging gun through the resistor and the CP indicator light. The two ends of the CP indicator light are respectively connected to the PE end of the charging gun and the resistor.

[0024] In the embodiment of the present invention, the specific detection process is as follows: after the comprehensive detector is connected to the charging gun, the comprehensive detector controls the connection and disconnection of the charging gun CP line end and the internal response line of the comprehensive detector through the switch SW1. When the switch SW1 is closed, the charging gun CP line end is connected to the internal analog line of the comprehensive detector, and a charging request signal is given to the charging gun. At this time, the charging gun starts to work and outputs 220V AC voltage. The oscilloscope function of the comprehensive detector can test the analog signal of each terminal and display it on the oscilloscope. The user can view the waveform of each analog signal of the charging gun through the oscilloscope to determine whether the signal is normal. After the charging gun works, the 220V voltage emitted is transmitted to the 220V lamp. The working condition of the lamp can quickly reflect whether the output of the charging gun is normal. At the same time, the oscilloscope can also display whether the 220V AC voltage of the charging gun is stable.

[0025] Connect the JP1 and JP2 connectors in series with the on-board charger control circuit, connect the connector in series with the vehicle's on-board charger control circuit, and lead it to the detection panel of the comprehensive tester. By leading out the measurement terminal, you can detect whether the signal of the on-board charger is normal, and realize simultaneous detection of the charging gun and the on-board charger.

[0026] In this embodiment of the present invention, the comprehensive tester collects the ignition signal voltage of the on-board charger through the IG line terminal in the JP2 connector, measures the voltage value through the oscilloscope voltage measurement function, and leads to the CAN bus terminal, which is convenient for using the oscilloscope of the comprehensive tester to measure the communication waveform between the vehicle and the charging gun.

[0027] In an embodiment of the present invention, the comprehensive tester is connected to the charging gun to first determine the performance status of the charging gun. According to the jumper function of the on-board charger system, by setting the test terminal, the relevant circuits of the on-board charger can be measured non-destructively, while shortening the detection time.

[0028] In the embodiment of the present invention, the oscilloscope function integrates the detection of the charging system CP signal waveform, CAN network waveform, and line voltage, which improves the efficiency of the detection process. It can detect whether the charging gun is damaged and which signal is output or not, providing accurate data for the next step of maintenance.

[0029] The instrument simulates car charging. JP1 is connected to the car's charger, JP2 is connected to the car's charging signal terminal, and is connected to the charging gun at the same time. The CP terminal of the charging gun sends a signal to check whether it is connected to the instrument. If connected, the CP terminal of the charging gun sends an analog signal to the instrument, and then the oscilloscope can directly detect the waveform of the CP analog signal. Then the instrument responds, and the charging gun sends 220V AC power to the load of the instrument. The load light is on, indicating that there is voltage output. At the same time, it is connected to the car communication through CAN of JP2 to view the network waveform, and the voltage is detected through the IG terminal. The voltage is connected to the oscilloscope for display.

[0030] Matters not covered by the present invention are known technologies.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. AC charging system comprehensive tester, characterized by: It includes a shell, a detection circuit is arranged inside the shell, and an oscilloscope, a load, a JP1 connector, a JP2 connector, a lead-out measurement terminal and a switch indicating device are arranged at the front end of the shell. The oscilloscope is connected to the JP1 connector and the JP2 connector via the lead-out measurement terminals respectively, and the load and the switch indicating device are both connected to the lead-out measurement terminals. The comprehensive detector detects the status data of the charging gun and the on-board charger by simulating the electric vehicle charging process.

2. The AC charging system comprehensive detector according to claim 1, characterized in that: The JP1 connector is connected to the on-board charger, the JP2 connector is connected to the charging signal terminal of the vehicle, and is connected to the charging gun through the lead-out measurement terminal.

3. The AC charging system comprehensive detector according to claim 1, characterized in that: The load is a 220V light bulb, which is used to connect to the neutral wire and live wire of the charging gun through the lead-out measurement terminal. There is one light bulb.

4. The AC charging system comprehensive detector according to claim 3, characterized in that: The switch indication device includes a CP indicator light, a resistor and a switch SW1. One end of the switch SW1 is connected in series with the resistor and the indicator light and then connected to the PE line of the charging gun. The other end of the switch SW1 is connected to the CP terminal of the charging gun. The two ends of the CP indicator light are respectively connected to the PE terminal of the charging gun and one end of the resistor.

5. The AC charging system comprehensive detector according to claim 1, characterized in that: The specific detection process is as follows: after the integrated tester is connected to the charging gun, the integrated tester controls the connection and disconnection of the charging gun CP line end and the internal response line of the integrated tester through the switch SW1. When the switch SW1 is closed, the charging gun CP line end is connected to the internal analog line of the integrated tester, giving the charging gun a charging request signal. At this time, the charging gun starts to work and outputs 220V voltage. The oscilloscope function of the integrated tester can test the analog signal of each terminal and display it on the oscilloscope. The user can view the waveform of each analog signal of the charging gun through the oscilloscope to determine whether the signal is normal. After the charging gun works, the 220V voltage emitted is transmitted to the 220V lamp. The working condition of the lamp can quickly reflect whether the output of the charging gun is normal. At the same time, the oscilloscope can also display whether the 220V AC voltage of the charging gun is stable. Connect the JP1 and JP2 connectors in series with the on-board charger control circuit, connect the connector in series with the vehicle's on-board charger control circuit, and lead it to the detection panel of the comprehensive tester. By leading out the measurement terminal, you can detect whether the signal of the on-board charger is normal, and realize simultaneous detection of the charging gun and the on-board charger.

6. The AC charging system comprehensive detector according to claim 5, characterized in that: The comprehensive tester collects the ignition signal voltage of the on-board charger through the IG line terminal in the JP2 connector, measures the voltage value through the oscilloscope voltage measurement function, and uses the oscilloscope function of the comprehensive tester to measure the communication waveform between the vehicle and the charging gun at the CAN bus terminal.

7. The AC charging system comprehensive detector according to claim 5, characterized in that: The comprehensive tester is connected to the charging gun to first determine the performance status of the charging gun. According to the jumper function of the on-board charger system, by setting the test terminal, the relevant lines of the on-board charger can be measured non-destructively, while shortening the detection time.

8. The AC charging system comprehensive detector according to claim 5, characterized in that: The oscilloscope integrates the functions of detecting the charging system CP signal waveform, CAN network waveform, and line voltage, improving the efficiency of the detection process. It can also detect whether the charging gun is damaged and which signal is not output, providing accurate data for the next step of maintenance.

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