Charging pile PCBA function test device and system

Abstract

The utility model relates to a charging pile PCBA function testing device and system in the technical field of testing equipment, the charging pile PCBA function testing device comprises a tool control board, a calibration source, a switch, an upper computer and a universal meter, the tool control board is in communication connection with the switch, the switch is in communication connection with the upper computer, and the tool control board is provided with a first relay and a second relay; the tool control board is in communication connection with the calibration source, the calibration source is electrically connected with the first relay, after the tool control board outputs control signals to the calibration source and the first relay, the first relay is conducted, the calibration source outputs power-on voltage, and the power-on voltage is output to the printed circuit board through the first relay; the tool control board is in communication connection with the universal meter, after the tool control board outputs a control signal to the second relay, the second relay is conducted, the universal meter is used for detecting a TP test point of the printed circuit board, and the problems that when an existing test system carries out function test on the PCBA, only one PCBA can be subjected to function test, and the test efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a charging pile PCBA functional testing device and system. Background Technology

[0002] The AC Charging Pile (PCBA) functional testing system is a crucial step in ensuring that the PCBA functions correctly according to design requirements after manufacturing. This testing system aims to verify whether the individual electronic components, circuit connections, and overall performance of the PCBA meet the expected technical specifications and safety standards.

[0003] Traditional PCBA functional testing systems typically only perform broad functional tests on PCBAs, such as electrical performance testing, communication protocol testing, and safety protection mechanism testing. They lack functions such as leakage current detection, grounding continuity testing, calibration, and charging testing. Therefore, the test results cannot fully reflect the PCBA's compliance with the required technical specifications and safety standards. Consequently, they cannot completely screen out problematic PCBAs, leading to substandard products entering the market and damaging brand image. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a charging pile PCBA functional testing device and system, which solves the problem that existing testing systems only support simple function testing and cannot completely screen out problematic PCBAs.

[0005] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0006] A charging pile PCBA functional testing device is provided. The charging pile PCBA functional testing device is communicatively connected to the printed circuit board and includes a tooling control board, a calibration source, a switch, a host computer and a multimeter. The tooling control board is communicatively connected to the switch, and the switch is communicatively connected to the host computer. The tooling control board is provided with a first relay and a second relay.

[0007] The tooling control board is communicatively connected to the calibration source, and the calibration source is electrically connected to the first relay. When the tooling control board outputs a control signal to the calibration source and the first relay, the first relay is turned on, the calibration source outputs a power-on voltage, and outputs it to the printed circuit board through the first relay. The power-on voltage is used to power on the printed circuit board.

[0008] The tooling control board is connected to a multimeter. When the tooling control board outputs a control signal to the second relay, the second relay is turned on. The multimeter is used to test the TP test points of the printed circuit board.

[0009] Optionally, when the tooling control board outputs a control signal to the calibration source and the first relay, the first relay is turned on, the calibration source outputs a standard current, and outputs it to the current sampling port of the printed circuit board through the first relay. The standard current is used as the current sampled by the current transformer of the printed circuit board.

[0010] Optionally, the tooling control board is further provided with a third relay, which is electrically connected to the emergency stop interface of the printed circuit board. When the tooling control board outputs an emergency stop signal to the third relay, the third relay is turned on and reads the status of the printed circuit board through the emergency stop interface. The third relay is also electrically connected to the leakage current interface of the printed circuit board. When the tooling control board outputs a leakage current signal to the third relay, the third relay is turned on and reads the current of the leakage current transformer of the printed circuit board through the leakage current interface. The third relay is also electrically connected to the grounding interface of the printed circuit board. When the tooling control board outputs a ground control signal to the third relay, the third relay is turned on and reads the grounding status of the printed circuit board through the grounding interface.

[0011] Optionally, the second relay is connected to the CP interface of the printed circuit board.

[0012] Optionally, the communication serial port of the tooling control board is connected to the serial port of the printed circuit board.

[0013] A charging pile PCBA functional testing system includes the charging pile PCBA functional testing device described in any one of the above, and further includes a test cabinet and a test bed. The charging pile PCBA functional testing device is installed in the test cabinet. The test bed is provided with test areas for testing at least two sets of printed circuit boards. Each set of printed circuit boards is installed on each test area, and each set of printed circuit boards is communicatively connected to the test cabinet.

[0014] Optionally, the test cabinet is equipped with a connector, and the test cabinet communicates with the printed circuit board through the connector.

[0015] Optionally, the test cabinet has a built-in tooling control board, which is connected to the docking plug via a communication cable.

[0016] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0017] By setting up a calibration source, a first relay, a second relay, a third relay, a switch, a multimeter, etc., the hardware foundation for various functional tests is provided to support the performance of various functional tests, including leakage current detection, grounding continuity detection, calibration, charging detection, and network connection detection. This enables the charging pile PCBA functional testing device of this application to more comprehensively screen out problematic printed circuit boards (PCBAs) and reduce the probability of unqualified products entering the market.

[0018] By setting up multiple test areas on the test bed for testing printed circuit boards, multiple printed circuit boards can be tested simultaneously on the test bed. In addition, to ensure that the test cabinet can test multiple printed circuit boards at the same time, converters and connectors are set up to achieve data communication, thereby enabling simultaneous testing through RS-485 / RS-232 multi-point communication. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of the charging pile PCBA functional testing device proposed in this embodiment;

[0021] Figure 2 This is the front view of the test cabinet proposed in Embodiment 2;

[0022] Figure 3 This is a structural diagram showing the location of the tooling control board of the test cabinet proposed in Embodiment 2.

[0023] Figure 4 This is a structural diagram showing the location of the calibration source and switch within the test cabinet as proposed in Embodiment 2.

[0024] Figure 5 This is a block diagram of the charging pile PCBA functional testing system proposed in Embodiment 2.

[0025] Attached reference numerals: 1. Test cabinet; 2. Connecting plug; 3. Calibration source; 4. Switch; 5. Multimeter; 6. Tooling control board; 7. Power switch; 8. Emergency stop button; 9. Operation keys; 10. Indicator light; 11. Display. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0027] Example 1

[0028] like Figure 1 As shown, a charging pile PCBA functional testing device is provided. The charging pile PCBA functional testing device is communicatively connected to the printed circuit board and includes a tooling control board, a calibration source, a switch, a host computer, and a multimeter. The tooling control board is communicatively connected to the switch, and the switch is communicatively connected to the host computer. A first relay and a second relay are provided on the tooling control board.

[0029] First, the test cases are imported into the host computer software. The host computer and the tooling control are connected through a switch. It should be noted that in this embodiment, the test control is implemented through software control, which is existing technology. The tooling control board is a control board that is integrated and connected through various circuit components. Those skilled in the art can make circuit connections according to the requirements of software control, which is also existing technology. This embodiment provides the hardware foundation for testing each function.

[0030] First, the printed circuit board is powered on. The tooling control board is connected to the calibration source, and the calibration source is electrically connected to the first relay. When the tooling control board outputs a control signal to the calibration source and the first relay, the first relay is turned on, the calibration source outputs a power-on voltage, and outputs it to the printed circuit board through the first relay. The power-on voltage is used to power on the printed circuit board.

[0031] Specifically, the calibration source outputs 220V via the RS485_2 serial port of the tooling control board, which then controls the DO2_V switch of the first relay to turn on and outputs 220V to power the printed circuit board.

[0032] When performing TP voltage testing, the fixture control board communicates with the multimeter. When the fixture control board outputs a control signal to the second relay, the second relay is turned on. The multimeter is used to test the TP test points on the printed circuit board. Specifically, the fixture control board controls the DO4_5V, DO5_-12V, DO6_3.3V, DO7_3.8V, and DO8_12V switches of the second relay to turn on, and then uses the multimeter to test the TP voltage on the printed circuit board. Finally, the data from the multimeter is read through the RS232_1 serial port of the fixture control board to read the TP voltage.

[0033] During the metrological calibration of the printed circuit board, the tooling control board outputs control signals to the calibration source and the first relay. At this time, the first relay is turned on, the calibration source outputs current, and the number of pulses of the printed circuit board is collected in real time for calibration.

[0034] Specifically, firstly, the calibration source outputs a 5A current via the RS485_2 serial port of the tooling control board, and controls the DO1_I switch of the first relay to turn on, outputting a 5A current to the printed circuit board; secondly, the current of the current transformer is sampled via the AD2 current sampling port of the printed circuit board; thirdly, the DO3_CF switch of the first relay is turned on to sample the number of electrical pulses on the printed circuit board; fourthly, the error result of the standard source is read via the RS485_2 serial port of the tooling control board; finally, the tooling control board controls the RS485_3 serial port of the printed circuit board via the RS485_1 serial port to write the error result into the printed circuit board for calibration.

[0035] The charging pile PCBA functional testing device of this application can also test the CP voltage of the printed circuit board. Specifically, the second relay is connected to the CP interface of the printed circuit board, so that the tooling control board controls the output of the DO9_S2 switch of the second relay to switch the resistor on the printed circuit board, thereby testing the CP voltage.

[0036] The tooling control board is also equipped with a third relay, which is electrically connected to the emergency stop interface of the printed circuit board. When the tooling control board outputs an emergency stop signal to the third relay, the third relay is turned on and reads the status of the printed circuit board through the emergency stop interface. Then, the tooling control board controls the DO10 emergency stop switch of the third relay to output an emergency stop signal, and then reads the status of the printed circuit board through the RS485_1 serial port of the tooling control board to see if there is an emergency stop fault.

[0037] The third relay is electrically connected to the leakage current interface of the printed circuit board. When the tooling control board outputs a leakage current signal to the third relay, the third relay is turned on and reads the current of the leakage current transformer of the printed circuit board through the leakage current interface. Thus, the tooling control board controls the third relay DO11 leakage current switch to output a leakage current signal and reads the current of the leakage current transformer of the printed circuit board through the AD1 interface of the printed circuit board. Finally, the tooling control board reads the status of the printed circuit board through the RS485_1 serial port to see if there is a leakage fault.

[0038] The third relay is also electrically connected to the grounding interface of the printed circuit board. When the tooling control board outputs a ground control signal to the third relay, the third relay is turned on and reads the grounding status of the printed circuit board through the grounding interface. Specifically, the tooling control board controls the DO12PE switch of the third relay to disconnect the PE line, and then reads the status of the printed circuit board through the RS485_1 serial port of the tooling control board to see if it is a grounding continuity fault.

[0039] The communication serial port RS485_1 of the tooling control board is connected to the serial port RS485_3 of the printed circuit board. During network testing, the printed circuit board is connected to the network cable, and then the printed circuit board is controlled to switch to Ethernet mode through the RS485_1 serial port of the tooling control board. The Ethernet connection is then tested. A 4G card is inserted into the printed circuit board, and the printed circuit board is controlled to switch to 4G mode through the RS485_1 serial port of the tooling control board. The 4G connection is then tested.

[0040] The RS485_1 communication serial port of the tooling control board is connected to the RS485_3 serial port of the printed circuit board. During card swiping testing, the card swiping communication interface of the printed circuit board is connected to the card swiping board, and the communication serial port of the tooling control board is connected to the screen interface of the printed circuit board. Specifically, the printed circuit board first connects to the card swiping board through its RS232_2 serial port, and then reads the status of the printed circuit board through the RS485_1 serial port of the tooling control board to determine if there is a printing fault. When checking whether the screen serial port of the printed circuit board is normal, the transmit and receive pins of the screen serial port on the printed circuit board are shorted first, and then the serial port of the printed circuit board is controlled by the RS485_1 serial port of the tooling control board to send data and see if it can loop back, thereby confirming whether the screen serial port is normal.

[0041] On the other hand, this application also conducts a charging test. The printed circuit board is controlled to be in plug-and-charge mode via the RS485_1 serial port of the tooling control board. Then, the DO9_S2 switch of the second relay is controlled to turn on the output to switch the resistor and enter the charging mode. Since the needle bed used for testing where the printed circuit board is located will generate current due to the load resistor, the voltage, current, power, and frequency can be read by a multimeter to see if they are normal.

[0042] Thus, the charging pile PCBA functional testing device of this embodiment completes all functional tests. By setting up a calibration source, a first relay, a second relay, a third relay, a switch, a multimeter, etc., it provides the hardware foundation for each functional test to support the performance of each functional test, including leakage current detection, grounding continuity detection, calibration, charging detection, and network connection detection. As a result, the charging pile PCBA functional testing device of this application can more comprehensively screen out problematic printed circuit boards (PCBAs) and reduce the probability of unqualified products entering the market.

[0043] Example 2

[0044] like Figure 2 and Figure 5As shown, a charging pile PCBA functional testing system includes a charging pile PCBA functional testing device as described in Embodiment 1, and also includes a test cabinet and a test bed. The charging pile PCBA functional testing device is installed in the test cabinet. The test bed is provided with test areas for testing at least two sets of printed circuit boards. Each set of printed circuit boards is installed on each test area, and each set of printed circuit boards is communicatively connected to the test cabinet.

[0045] In this embodiment, an example is given of a test area on the test probe bed that provides four sets of printed circuit boards for testing. The arrangement of the four sets of printed circuit boards mounted on the test probe bed can be set to 1. The layout of 4 can also be set to 2. The layout of 2 is not limited here.

[0046] Specifically, such as Figure 2 and Figure 5 As shown, the test cabinet is equipped with docking plugs, and all converters are also connected to the docking plugs via communication cables.

[0047] Before conducting functional tests, all the printed circuit boards to be tested are mounted on the test bed. Then, the other end of the communication cable on the converter on the test bed is connected to the docking plug on the test cabinet. This allows RS-485 / RS-232 multi-point communication to be achieved regardless of the number of printed circuit boards to be tested on the test bed, simply by using the communication cable and the docking plug. This enables the test cabinet to transmit data through a single docking plug, thereby enabling the testing of various functions.

[0048] Among them, such as Figure 2 and Figure 3 As shown, the test cabinet has a built-in tooling control board. During functional testing, the test cabinet mainly communicates with the tooling control board through the communication cable between the tooling control board and the docking plug. The tooling control board also communicates with the host computer. During testing, the host computer connects the prepared test program to the RJ45 interface of the tooling control board through the communication cable, and then the tooling control board can perform functional testing. It should be noted that the tooling control board in this application is an existing control board that includes a microcontroller.

[0049] like Figure 2 and Figure 4 As shown, the test cabinet is also equipped with a calibration source, a switch, and at least two sets of multimeters. The tooling control board is connected to the calibration source, the switch, and the at least two sets of multimeters. The number of multimeters is at least consistent with the number of printed circuit boards that can be tested on the test probe bed, so that the multimeters can be matched one by one with the printed circuit boards during testing.

[0050] During testing, the tooling control board in the test cabinet uses a multimeter to test the TP voltage of the printed circuit board. At the same time, the tooling control board communicates with the calibration source through the RS485 interface, controlling the calibration source to output 220V / 5A. Then, the calibration source calibrates the printed circuit board through the communication cable.

[0051] like Figure 5 As shown, this application can also test the CP voltage of the printed circuit board. Specifically, the relay is connected to the CP interface of the printed circuit board, so that the tooling control board controls the output of the relay switch to switch the resistor on the printed circuit board, thereby testing the CP voltage. On the other hand, the tooling control board also tests the Ethernet mode and 4G mode of the printed circuit board to determine whether its Ethernet network is working properly and whether its 4G network is working properly. The tooling control board can also control the output of an emergency stop signal, and then read the status of the printed circuit board through the serial port of the tooling control board to see if it is an emergency stop fault.

[0052] The test probe bed is equipped with a leakage current transformer and a current transformer. The leakage current transformer is used by the test cabinet to detect leakage current in the printed circuit board, and the current transformer is used by the test cabinet to measure and test the printed circuit board. Both the leakage current transformer and the current transformer are connected to the printed circuit board for communication.

[0053] Specifically, during testing, the tooling control board controls the relay to output a leakage current signal, which is sampled by a leakage current transformer. Then, the serial port of the tooling control board reads whether the printed circuit board has a leakage fault. In addition, the tooling control board can also test the printed circuit board for card swiping faults and grounding continuity faults. When testing for grounding continuity faults, the tooling control board controls the output relay to disconnect the PE line, and then reads the status of the printed circuit board.

[0054] like Figure 2 As shown, the test cabinet is equipped with indicator lights and a display. The indicator lights can display any one of red, yellow, or green light. The display is mounted on the side wall of the test cabinet and is hinged to the side wall of the test cabinet.

[0055] This application sends data to the tooling control board via the serial port of the printed circuit board, and then the tooling control board controls the display of the received data on the monitor, thereby confirming whether the monitor serial port is working properly.

[0056] The tooling control board can also control the printed circuit board to a plug-and-charge mode. By controlling the switch to engage, it enters the charging mode and uses a multimeter to read whether the voltage, current, and frequency are normal.

[0057] The test cabinet is equipped with a power switch. The power switch is turned on before the test cabinet tests the printed circuit board on the needle bed, and the power switch is turned off after the test cabinet completes the test of the printed circuit board.

[0058] The test cabinet is also equipped with an emergency stop button and operation keys.

[0059] The test probe bed is also equipped with a card reader and a charging load. The card reader is used by the test cabinet to perform card-swiping function testing on the printed circuit board, and the charging load is used to generate current for charging.

[0060] It should be noted that in this embodiment, the control method of the tooling control board is all existing technology and is implemented through software control.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A charging pile PCBA function test device, characterized in that, The charging pile PCBA functional testing device is communicatively connected to the printed circuit board and includes a tooling control board, a calibration source, a switch, a host computer, and a multimeter. The tooling control board is communicatively connected to the switch, and the switch is communicatively connected to the host computer. The tooling control board is equipped with a first relay and a second relay. The tooling control board is communicatively connected to the calibration source, and the calibration source is electrically connected to the first relay. When the tooling control board outputs a control signal to the calibration source and the first relay, the first relay is turned on, the calibration source outputs a power-on voltage, and outputs it to the printed circuit board through the first relay. The power-on voltage is used to power on the printed circuit board. The tooling control board is connected to a multimeter. When the tooling control board outputs a control signal to the second relay, the second relay is turned on. The multimeter is used to test the TP test points of the printed circuit board.

2. The charging pile PCBA function test device according to claim 1, characterized in that, When the tooling control board outputs a control signal to the calibration source and the first relay, the first relay is turned on, the calibration source outputs a standard current, and outputs it to the current sampling port of the printed circuit board through the first relay. The standard current is used as the current sampled by the current transformer of the printed circuit board.

3. The charging pile PCBA function test device according to claim 1, characterized in that, The tooling control board is also equipped with a third relay, which is electrically connected to the emergency stop interface of the printed circuit board. When the tooling control board outputs an emergency stop signal to the third relay, the third relay is activated and reads the status of the printed circuit board through the emergency stop interface. The third relay is also electrically connected to the leakage current interface of the printed circuit board. When the tooling control board outputs a leakage current signal to the third relay, the third relay is activated and reads the current of the leakage current transformer of the printed circuit board through the leakage current interface. The third relay is also electrically connected to the grounding interface of the printed circuit board. When the tooling control board outputs a ground control signal to the third relay, the third relay is activated and reads the grounding status of the printed circuit board through the grounding interface.

4. The charging pile PCBA function test device according to claim 1, characterized in that, The second relay is connected to the CP interface of the printed circuit board.

5. The charging pile PCBA functional testing device according to claim 1, characterized in that, The communication serial port of the tooling control board is connected to the serial port of the printed circuit board.

6. A charging pile PCBA function test system, characterized in that, The device includes the charging pile PCBA functional testing device according to any one of claims 1-5, and further includes a test cabinet and a test bed. The charging pile PCBA functional testing device is installed in the test cabinet. The test bed is provided with a test area for testing at least two sets of printed circuit boards. Each set of printed circuit boards is installed on each test area. Each set of printed circuit boards is communicatively connected to the test cabinet.

7. The charging pile PCBA function test system according to claim 6, characterized in that, The test cabinet is equipped with a connector, and the test cabinet communicates with the printed circuit board through the connector.

8. The charging pile PCBA function test system according to claim 7, characterized in that, The test cabinet has a built-in tooling control board, which is connected to the docking plug via a communication cable.

Images