Direct current charging pile main control board test system

Abstract

The utility model discloses a DC charging pile main control board test system, which comprises a test control board and a tested DC pile main control board, and the test control board and the tested DC pile main control board are connected through a serial port for data signal transmission. The test control board sends a signal to carry out input and output test, communication test, analog quantity acquisition test and interface test on the tested DC pile main control board; the upper computer is in communication connection with the test control panel, the upper computer edits or selects a test instruction and sends the test instruction to the test control panel, and the test control panel receives the test instruction of the upper computer, analyzes and sends out a corresponding test signal to perform a corresponding test and uploads a test result to the upper computer. The DC charging pile main control board test system can test various interfaces such as an input interface, an output interface, a communication interface and the like of the DC charging pile main control board in a unified manner, and various interfaces can be tested at one time.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles and circuit control, and in particular to a DC charging pile main control board testing system. Background Art

[0002] New energy vehicles are increasingly recognized by the public. New energy vehicles are in line with the development trend of low-carbon, environmentally friendly and green environment. The country also strongly supports the development of the new energy vehicle industry. Therefore, new energy vehicles will undoubtedly become the development direction of future automobiles.

[0003] New energy vehicles need to use DC charging stations to recharge their batteries. The functions of DC charging stations are realized through the main control board and the program burned into the main control board. The main control board of the DC charging station connects to various peripherals through the input and output interfaces on the main control board, and transmits data through the communication interface. Therefore, before the DC charging station main control board leaves the factory, it is necessary to test whether the interface of the DC charging station main control board can operate normally. Existing testing tools can only test a single interface of the DC charging station main control board. The need to change tools during testing is cumbersome and time-consuming. Utility Model Content

[0004] The purpose of the utility model is to provide a DC charging pile main control board test system. The test system can uniformly test various interfaces of the DC charging pile main control board, such as the input interface, output interface, and communication interface. Multiple interfaces can be tested at one time. The test steps are simple and comprehensive, which saves time. The system is suitable for large-scale testing of DC charging pile main control boards during industrial production.

[0005] The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a DC charging pile main control board testing system, including a test control board and a tested DC pile main control board, the test control board and the tested DC pile main control board are connected through a serial port to transmit data signals; the test control board sends a signal to perform input and output testing, communication testing, analog quantity acquisition testing and interface testing on the tested DC pile main control board; a host computer, the host computer is communicatively connected to the test control board, the host computer edits or selects test instructions, and sends the test instructions to the test control board, the test control board receives the test instructions of the host computer, parses and sends corresponding test signals to perform corresponding tests, and uploads the test results to the host computer.

[0006] The present invention is further configured as follows: the DC charging pile main control board test system also includes a barcode scanner, which is electrically connected to the host computer by signal. The barcode scanner scans the QR code on the tested DC pile main control board, enters the code of the tested DC pile main control board and generates a test report in the host computer.

[0007] The present invention is further configured as follows: the test control board includes a main control unit, the main control unit includes several single-chip microcomputers, and the DO output voltage and DI input voltage of the main control unit are verified to test the input and output status of the tested DC pile main control board.

[0008] The present invention is further configured as follows: the test control board includes an ADC circuit, and the ADC circuit signal is connected to the main control unit to transmit the acquired signal of the tested DC pile main control board back to the main control unit.

[0009] The present invention is further configured as follows: the ADC circuit includes an NTC module and an LED detection module, the NTC module transmits back a temperature signal collected by the tested DC pile main control board, and the LED detection module transmits back a light sensor signal.

[0010] The present invention is further configured as follows: the test control board includes a communication unit, the communication unit is electrically connected to the main control unit, and command and feedback data are transmitted between the main control unit and the communication unit.

[0011] The utility model is further configured as follows: the communication unit includes a TTL communication module, an RS232 communication module, and an RS485 communication module, and several communication modules are connected to each other by electrical signals. Each communication module is respectively connected to the tested DC pile main control board, and communication protocol data sending and receiving verification is performed between the tested DC pile main control board to test the various communication functions of the tested DC pile main control board.

[0012] The utility model is further configured as follows: the test control board includes a CAN bus unit, the CAN bus unit is connected to the main control unit by electrical signals for data transmission, the CAN bus unit is connected to the tested DC pile main control board, and CAN protocol data sending and receiving verification is performed between the tested DC pile main control board and the CAN communication function of the tested DC pile main control board is tested.

[0013] The utility model is further configured as follows: the test control board includes a USB chip, the USB chip is signal-connected to the tested DC pile main control board, the tested DC pile main control board obtains the PID and VID of the USB chip and sends them to the main control unit to verify the USB communication function of the tested DC pile main control board.

[0014] The utility model is further configured as follows: the test control board sends a 4G test command or an electronic lock test command to the tested DC pile main control board, and reads back the information to test the 4G or electronic lock interface of the tested DC pile main control board.

[0015] Compared with the existing technology, the utility model has the following beneficial effects: the DC charging pile main control board test system can uniformly test various interfaces of the DC charging pile main control board, such as the input interface, output interface, communication interface, etc., and can test multiple interfaces at one time. The test steps are simple and comprehensive, saving time, and is suitable for large-scale testing during the industrial production of DC charging pile main control boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a block diagram of the overall structure of the DC charging pile main control board test system in the embodiment.

[0017] Figure 2 This is a block diagram of the signal transmission relationship of the DC charging pile main control board test system in the embodiment.

[0018] Figure 3 FIG. 1 is a partial circuit diagram of a main control unit in an embodiment.

[0019] Figure 4 FIG. 2 is a partial circuit diagram II of the main control unit in the embodiment.

[0020] Figure 5 FIG. 2 is a circuit diagram of a portion of the ADC circuit in the embodiment.

[0021] Figure 6 1 is a circuit diagram of part of the communication unit in the embodiment.

[0022] Figure 7 1 is a flow chart of communication testing in the embodiment.

[0023] Figure 8 1 is a partial circuit diagram of the CAN bus unit in the embodiment.

[0024] In the figure: 1. Test control board; 2. Host computer; 3. Main control board of the DC pile under test; 4. Barcode scanner. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the 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.

[0026] A DC charging pile main control board test system, such as Figure 1 、 Figure 2As shown, it includes a test control board, a main control board of the DC pile to be tested and a host computer. The test control board is connected to the main control board of the DC pile to be tested through a serial interface, and data signals are transmitted between the two through the serial interface. The test control board sends signals to test various interface functions such as the input and output interface, communication interface, and analog quantity acquisition of the main control board of the DC pile to be tested; the host computer is connected to the test control board signal through the serial interface for data transmission, the test control board uploads the test information to the host computer through the serial port, and the host computer sends the test items to the test control board through the serial port. The test control board receives the test instructions of the host computer, parses and sends corresponding test signals to the main control board of the DC pile to be tested for corresponding testing.

[0027] like Figure 1 、 Figure 2 As shown, the DC charging pile main control board test system also includes a barcode scanner, which is connected to the upper computer by electrical signals. The barcode scanner scans the QR code on the tested DC pile main control board to obtain the main board code. The barcode scanner enters the code of the tested DC pile main control board into the upper computer. The upper computer combines the main board code and test data to generate a unique test report. The test report is entered and stored, and can be traced based on the test report ID.

[0028] like Figure 3 、 Figure 4 As shown, the test control board includes a main control unit, which is an MCU composed of several single-chip microcomputers. The single-chip microcomputers are connected by electrical signals. The main control unit is connected to the main control board of the DC pile under test by electrical signals. The main control unit sends a test signal to test the interface function of the main control board of the DC pile under test, such as Figure 4 As shown, the DO output interface and DI input interface of the single-chip microcomputer U1.2 are connected to the tested DC pile main control board. The main control unit outputs signals to the tested DC pile main control board and collects signals to determine whether the input and output interfaces of the tested DC pile main control board are normal or abnormal.

[0029] The main control unit has an ADC pin, such as Figure 3 The 34th and 35th pins of the microcontroller U1.1, the ADC pins are connected to the ADC circuit. The ADC circuit is as follows Figure 5 As shown, the ADC circuit signal is connected to the ADC pin of the main control unit, and the interface of the ADC circuit is connected to the tested DC pile main control board. During the test, the ADC circuit will send the acquired signal of the tested DC pile main control board back to the main control unit for comparison and verification. For example, in the NTC temperature information acquisition test, the main control unit reads the voltage signal value of the temperature acquired by the tested DC pile main control board through the ADC circuit, and then connects a resistor with a fixed resistance in parallel at the acquisition point, and reads the voltage signal value of the temperature acquired by the tested DC pile main control board again to compare and verify whether it is normal or abnormal.

[0030] During the LED test, the main control unit sends an LED enable command to the main control board of the DC charging pile under test. The main control board of the DC charging pile under test lights up the LED. The main control unit detects the light emission of the LED through the light sensor module. The detection module transmits the signal back to the main control unit through the ADC circuit. The main control unit compares and verifies whether it is normal or abnormal.

[0031] like Figure 2 As shown in the figure, the communication test includes TTL loop test, RS232 loop test, RS485 communication test, CAN bus test, and USB communication test. The test control board includes a communication unit, which is connected to the main control unit by electrical signals. The main control unit and the communication unit transmit data for command issuance and signal feedback, such as Figure 6 As shown, the communication unit includes a TTL communication module, an RS232 communication module, and an RS485 communication module. Several communication modules are connected to each other by electrical signals. The interfaces of each communication module are connected to the tested DC pile main control board respectively, and the communication protocol data is sent and received between the tested DC pile main control board to verify the communication functions of the tested DC pile main control board. Figure 7 As shown, in the TTL loop test, the test platform sends a TTL loop test command to the DC charging pile main control board under test. The DC charging pile main control board under test sends test data through the test serial port and receives data from the serial port at the same time. After the transmission is completed, it verifies whether the data is consistent with the sent data, waits for confirmation, and returns the test results to the test platform. The module interfaces of the RS232 loop test, RS485 communication test, CAN bus test, USB communication test, etc. are connected to the DC charging pile main control board under test. The test control board and the DC charging pile main control board under test perform communication protocol data transmission and reception verification to test the communication function of the DC charging pile main control board under test. The specific process is the same as the TTL loop test and will not be described here.

[0032] like Figure 8 As shown, the CAN bus unit includes a CAN chip, which is connected to the microcontroller U1.1 signal of the main control unit through COM CAN RX and COM CAN TX for data transmission. The interface of the CAN bus unit is connected to the tested DC pile main control board, and CAN protocol data sending and receiving verification is performed between the tested DC pile main control board to test the CAN communication function of the tested DC pile main control board.

[0033] like Figure 2 As shown, the test control board includes a USB chip, which is connected to the signal of the DC pile main control board under test. The test control board sends a test command, and the DC pile main control board under test obtains the PID and VID of the USB chip and sends them to the test control board to verify the USB communication function of the DC pile main control board under test.

[0034] like Figure 2As shown, the test control board sends a 4G test command or an electronic lock test command to the tested DC pile main control board, and reads back the information to test the 4G or electronic lock interface of the tested DC pile main control board.

[0035] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A DC charging pile main control board test system, characterized by: include, A test control board and a tested DC pile main control board, wherein the test control board and the tested DC pile main control board are connected via a serial port to transmit data signals; the test control board sends a signal to perform input and output testing, communication testing, analog quantity acquisition testing and interface testing on the tested DC pile main control board; The host computer is communicatively connected to the test control board. The host computer edits or selects a test instruction and sends the test instruction to the test control board. The test control board receives the test instruction from the host computer, parses and sends a corresponding test signal to perform a corresponding test, and uploads the test result to the host computer.

2. A DC charging pile main control board test system according to claim 1, characterized in that: It also includes a barcode scanner, which is electrically connected to the host computer. The barcode scanner scans the QR code on the tested DC pile main control board, enters the code of the tested DC pile main control board and generates a test report in the host computer.

3. A DC charging pile main control board test system according to claim 1, characterized in that: The test control board includes a main control unit, which includes several single-chip microcomputers. The DO output voltage and DI input voltage of the main control unit are verified to test the input and output status of the tested DC pile main control board.

4. A DC charging pile main control board test system according to claim 3, characterized in that: The test control board includes an ADC circuit, and the ADC circuit signal is connected to the main control unit to transmit the acquired signal of the tested DC pile main control board back to the main control unit.

5. A DC charging pile main control board test system according to claim 4, characterized in that: The ADC circuit includes an NTC module and an LED detection module. The NTC module transmits back a temperature signal collected by the tested DC pile main control board, and the LED detection module transmits back a light sensor signal.

6. A DC charging pile main control board test system according to claim 3, characterized in that: The test control board includes a communication unit, which is electrically connected to the main control unit. Command and feedback data are transmitted between the main control unit and the communication unit.

7. A DC charging pile main control board test system according to claim 6, characterized in that: The communication unit includes a TTL communication module, an RS232 communication module, and an RS485 communication module. Several communication modules are connected to each other by electrical signals. Each communication module is respectively connected to the tested DC pile main control board, and communication protocol data sending and receiving verification is performed between the tested DC pile main control board to test the various communication functions of the tested DC pile main control board.

8. A DC charging pile main control board test system according to claim 3, characterized in that: The test control board includes a CAN bus unit, which is connected to the main control unit by electrical signals for data transmission. The CAN bus unit is connected to the tested DC pile main control board, and performs CAN protocol data sending and receiving verification between the tested DC pile main control board to test the CAN communication function of the tested DC pile main control board.

9. A DC charging pile main control board test system according to claim 3, characterized in that: The test control board includes a USB chip, which is signal-connected to the tested DC pile main control board. The tested DC pile main control board obtains the PID and VID of the USB chip and sends them to the main control unit to verify the USB communication function of the tested DC pile main control board.

10. A DC charging pile main control board test system according to claim 1, characterized in that: The test control board sends a 4G test command or an electronic lock test command to the tested DC pile main control board, and reads back the information to test the 4G or electronic lock interface of the tested DC pile main control board.

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