Charging pile power distribution circuit board testing device

Abstract

The invention relates to a charging pile power distribution circuit board testing device, and belongs to the technical field of charging pile circuit testing. Comprising a relay branch and a display branch. The test circuits are used for being installed on one side of the same component, and the installation positions of the test circuits correspond to all sets of control ports on the same side of the power distribution circuit board in a one-to-one mode. One end of the branch with the relay contact in series and one end of the branch with the relay coil in series are used for being connected with the first port and the second port in the control port through corresponding connecting terminals respectively, and the other end of the branch with the relay contact in series and the other end of the branch with the relay coil in series are used for being connected with the second port and grounded through corresponding connecting terminals respectively. The contacts are correspondingly closed or opened according to different level signals output by the second port; the display branch connected with the display unit in series is used for being connected between the third port and the fourth port in the control ports in series through the corresponding connecting terminals, and the display unit is used for displaying a corresponding test result according to a feedback signal which is sent from the first port to the third port and corresponds to closing or opening of the contact.

Description

Technical Field

[0001] The invention relates to a charging pile power distribution circuit board testing device, belonging to the technical field of charging pile circuit testing. Background Art

[0002] With the rise of the new energy vehicle industry, the number of new energy electric vehicles is growing rapidly. A facility closely related to new energy vehicles is the charging pile, which can provide supplements for new energy batteries. Since high-power charging piles need to take into account charging, safety, communication and other functions, the power distribution control unit of the charging pile controls the power distribution and output of the whole machine to ensure that the charging pile can safely and efficiently charge multiple electric vehicles at the same time. The power distribution control circuit board corresponding to the power distribution control unit has a total of 24 groups of control ports, each of which is connected to one or more switch units. These switch units can control the connection between the power module and the charging gun to achieve current distribution. It is very important that the control port of the power distribution control circuit board can accurately control the switch unit to which it is connected. Therefore, it is necessary to test the ability of each group of control ports of the power distribution control board to control the switch unit to which it is connected.

[0003] At present, when testing each group of control ports of a power distribution control circuit board, relays are usually used to test and process signals of each group of control ports one by one. The testing process is complicated and cumbersome, and the efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a charging pile power distribution circuit board testing device to solve the current problem of complex and cumbersome testing of each group of control ports of the charging pile power distribution circuit board.

[0005] In order to solve the above technical problems, the present invention provides a charging pile power distribution circuit board testing device, which includes test circuits for being installed on one side of the same component and whose installation positions correspond one-to-one to the groups of control ports on the same side of the power distribution circuit board, so as to be respectively connected to the groups of control ports at the corresponding positions; the test circuit includes a relay branch and a display branch, and one end of the branch with relay contacts in series and the branch with relay coils in series in the relay branch are respectively used to connect the first port and the second port in the control port through the corresponding connection terminals, and the other end is respectively used to connect the second port and the ground through the corresponding connection terminals, so that the contacts are closed or opened accordingly according to the different level signals output by the second port received; the display branch with a display unit in series is used to be connected in series between the third port and the fourth port in the control port through the corresponding connection terminal to form a loop, and the display unit is used to display the corresponding test result according to the feedback signal corresponding to the closure or disconnection of the contacts sent from the first port to the third port.

[0006] Furthermore, the coil of the relay is used to be energized according to a high-level signal received from the second port, and to be de-energized according to a low-level signal received from the second port, so that the contacts are closed or opened accordingly.

[0007] Furthermore, the contacts of the relay are used to close when the coil of the relay is energized and to open when the coil of the relay is de-energized; when the contacts of the relay are opened, the feedback signal is a low-level signal, and when the contacts of the relay are closed, the feedback signal is a high-level signal.

[0008] Furthermore, the display unit is an indicator light, which is used to turn on / off according to the feedback signal. When the feedback signal is a high-level signal, the indicator light is off, and when the feedback signal is a low-level signal, the indicator light is on.

[0009] Furthermore, a diode whose conduction direction is the current direction from the second port to the first port is connected in series on the branch of the contact, and the diode is used to prevent backflow caused by reverse connection of the line.

[0010] Furthermore, a resistor is connected in series on the display branch, and the resistor is used to prevent the voltage at both ends of the indicator light from being too large.

[0011] Furthermore, it also includes a power supply, which is used to connect to the charging pile power distribution circuit board through corresponding connection terminals to supply power to the charging pile power distribution circuit board.

[0012] Furthermore, it also includes a power indicator device powered by the power supply, which is used to display different states when powered on and not powered on, so as to indicate whether the power supply is normal.

[0013] Furthermore, it also includes test circuits that are installed on the other side of the same component and whose installation positions correspond one-to-one to the groups of control ports on the other side of the power distribution circuit board. These test circuits contain internal structures consistent with the test circuits that are installed on one side of the same component and whose installation positions correspond one-to-one to the groups of control ports on the same side of the power distribution circuit board.

[0014] Beneficial effect: The present invention provides a new charging pile power distribution circuit board test device. The present invention utilizes the test device to connect the control ports of the power distribution board circuit board to facilitate simultaneous connection and testing. Each test circuit can test four ports of each control port group at the same time, wherein the relay circuit closes or closes the relay contact in the relay circuit according to the level signal received from the second port output; the first port sends a feedback signal corresponding to the contact closing / closing condition to the third port and the fourth port according to the closing / closing condition of the relay contact, so that the display unit in the display circuit displays the test result corresponding to normal or abnormal. Only when the first port and the second port connected to the relay branch and the third port and the fourth port connected to the display branch can output signals normally, the display unit can display the normal test result of the port; thus, the present invention can simultaneously connect and test each port of each control port group on one side of the power distribution control board, and intuitively reflect the test results of each group of ports of the power distribution circuit board through the output results of each display unit, which is simple and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a connection relationship diagram between the charging pile power distribution circuit board test device and the power distribution circuit board in the embodiment of the charging pile power distribution circuit board test device of the present invention; Figure 2 It is a circuit principle schematic diagram of the test loop in the embodiment of the charging pile power distribution circuit board test device of the present invention. DETAILED DESCRIPTION

[0016] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] Example of a charging pile power distribution circuit board test device The present embodiment provides a technical solution for a charging pile power distribution circuit board test device, which utilizes multiple groups of identical test circuits to connect with each group of control ports on one side of the power distribution board circuit board to facilitate simultaneous connection and testing. The display unit in the test circuit is used to intuitively provide feedback on whether the control relays of each group of control ports of the power distribution board circuit board can be opened or closed normally, which is simple and efficient.

[0018] The device comprises test circuits which are used to be installed on one side of the same component and the installation positions correspond to the control ports of the same side of the power distribution circuit board, so as to be connected to the control ports of the corresponding positions. The test circuit comprises a relay branch and a display branch. One end of the branch with relay contacts and the branch with relay coils in the relay branch are respectively used to connect the first port and the second port of the control port through the corresponding connection terminals. The other ends of the branch with relay contacts and the branch with relay coils are respectively used to connect the second port and the ground through the corresponding connection terminals, so that the contacts are closed or opened according to the different level signals output by the second port. The display branch with the display unit is used to be connected in series between the third port and the fourth port of the control port through the corresponding connection terminals to form a loop. The display unit is used to display the corresponding test result according to the feedback signal corresponding to the closing or opening of the contacts sent from the first port to the third port.

[0019] The device can simultaneously test each port of each group of control ports on one side of the power distribution control board, and intuitively reflect the test results of each group of ports on the power distribution circuit board through the output results of each display unit, which is simple and efficient.

[0020] The following is a detailed description of the charging pile power distribution circuit board test device: The charging pile power distribution circuit board test device includes test circuits for being installed on one side of the same component and the installation positions are respectively corresponding to the groups of control ports on the same side of the power distribution circuit board, so as to be respectively connected to the groups of control ports at the corresponding positions; The connection relationship between the charging pile power distribution circuit board testing device and the charging pile power distribution circuit board of this embodiment is shown in the figure. Figure 1 As shown, the connection terminals on the test device (also called test fixture) and the charging pile power distribution circuit board (i.e. Figure 1 The control terminals on the power distribution board to be tested in the charging pile are connected by test wires. Specifically, when testing the charging pile power distribution circuit board, the control ports (i.e. Figure 1 Each test circuit corresponding to the terminals on the power distribution board to be tested is connected to each group of control circuits through a test line.

[0021] The component may be a circuit board, a base or other components that can be used to fix the test circuit. The circuit schematic diagram of each test loop is as follows: Figure 2As shown, taking the first group of control ports J(1) on the power distribution circuit board as an example, each group of test circuits includes a relay branch and a display branch. One end of the branch with relay contacts in series and the branch with relay coils in series are respectively used to connect the first port J(1)1 and the second port J(1)2 in the group of control ports J(1) through corresponding connection terminals (the corresponding connection terminals are terminal 1 of J1 and terminal 2 of J1), and the other end is respectively used to connect the first port J(1)1 and the second port J(1)2 through corresponding connection terminals (the connection terminal of the other end of the branch with relay contacts in series is terminal 2 of J1, and the connection terminal of the other end of the branch with relay coils in series is terminal 2 of J1). The connecting terminal at one end is a grounding terminal) connected to the second port J(1)2 and grounded, so that the contact is closed or opened according to the different level signals output by the second port J(1)2; the display branch with the display unit in series is used to be connected in series between the third port J(1)3 and the fourth port J(1)4 in the group of control ports J1 through corresponding connecting terminals (the corresponding connecting terminals are terminal 3 of J1 and terminal 4 of J1) to form a loop, and the display unit is used to display the corresponding test result according to the feedback signal corresponding to the contact closing or opening sent by the first port J(1)1 to the third port J(1)3.

[0022] In this embodiment, the display unit is an indicator light (i.e. Figure 2 Device D in the figure) is used to turn on / off according to the feedback signal. When the feedback signal is a high-level signal, the indicator light is off, and when the feedback signal is a low-level signal, the indicator light is on.

[0023] In this embodiment, the test device is also provided with a power supply, which is used to connect to the power terminal of the power distribution circuit board through the connection terminal corresponding to the power supply to supply power to the power distribution circuit board; the test device can also be provided with a power indicator device powered by the power supply, which is used to display different states when powered on and not powered on to indicate whether the power supply is normal. The power indicator device can specifically be a power indicator light, which indicates whether the power supply is normally connected by turning on or off (for example, on for normal, off for abnormal), to avoid misjudging the abnormal power connection as an abnormality of the charging pile power distribution circuit board; in other embodiments, devices such as display screens can also be used as power indicator devices. Similarly, the display unit can also be other devices that can indicate whether the relay is closed or disconnected, such as a display screen.

[0024] In this embodiment, the coil of the relay is used to be energized according to the high-level signal received from the second port, and de-energized according to the low-level signal received from the second port, so that the contacts are closed or opened accordingly. Accordingly, the contacts of the relay are used to be closed when the coil of the relay is energized, and to be opened when the coil of the relay is de-energized; when the contacts of the relay are opened, the feedback signal is a low-level signal, and when the contacts of the relay are closed, the feedback signal is a high-level signal (the coil of the relay and the contacts of the relay are Figure 2Device KA in the figure, with contacts on the top and coil on the bottom).

[0025] In this embodiment, a diode having a conduction direction from the second port to the first port is also connected in series on the branch having the relay contacts in series. The diode is used to prevent backflow caused by reverse connection of the line. Reverse connection of the line here means that the end of the branch having the relay contacts in series connected to the first port and the end of the branch having the relay coil in series connected to the second port in the relay circuit are connected reversely. In other embodiments, the diode may not be set on the branch having the relay contacts in series.

[0026] In this embodiment, a resistor (i.e. Figure 2 The device R in the display branch is used to prevent the voltage at both ends of the indicator light from being too large. In other embodiments, the display branch may not be provided with a resistor.

[0027] In this embodiment, the power supply of the charging pile power distribution circuit board testing device is a 24V / 50W DC power supply.

[0028] In this embodiment, the test device also includes test circuits for installation on the other side of the same component and whose installation positions correspond one-to-one to the control ports on the other side of the power distribution circuit board. These test circuits have internal structures consistent with the test circuits for installation on one side of the same component and whose installation positions correspond one-to-one to the control ports on the same side of the power distribution circuit board. That is, by setting test circuits on both sides for corresponding one-to-one to the control ports on both sides of the power distribution circuit board, the effect of testing all the control ports on both sides of the power distribution circuit board can be achieved by plugging and unplugging twice.

[0029] Specifically, in this embodiment, the connection relationship between each group of control ports inside the charging pile power distribution board is equivalent to: the first port J(1)1 of each group of control ports inside the charging pile power distribution board is connected to the third port J(1)3 through a NOT gate, and the fourth port J(1)4 is grounded; when the second control port J(1)2 outputs a high-level signal, the relay is closed, and the indicator light should be off. If the indicator light is off, the control port is normal, and if the indicator light is on, the control port is abnormal; when the second control port J(1)2 outputs a low-level signal, the relay is disconnected, and the indicator light should be on. If the indicator light is on, the control port is normal, and if the indicator light is off, the control port is abnormal. On this basis, the specific test process of using the test device to test this power distribution circuit board is as follows: First, the connecting terminals of each test circuit of the device, which are used for being installed on one side of the same component and whose installation positions correspond to each group of control ports on the same side of the power distribution circuit board, are connected to each group of control ports through connecting wires, and the test device is started. After power-on, when the test program of the power distribution circuit board is running, the second port J(1)2 is triggered to output a high-level signal or a low-level signal; if the second port J(1)2 is triggered to output a high-level signal, the coil of the relay is energized and the relay contacts are closed. Then, after receiving the high-level signal, the first terminal J(1)1 sends a high-level signal (i.e., a feedback signal) to the third port J(1)3. The high-level signal is converted into a low-level signal through a NOT gate between the first port J(1)1 and the third port J(1)3. The low-level signal causes the display branch to lose power and the indicator light to go out, indicating that the control relay of the group of control ports is normally closed. If the trigger control output of the second port J(1)2 is a low-level signal, the relay coil loses power and the relay contacts are disconnected, and then the first port J(1)1 sends a feedback signal (low-level signal) to the third port J(1)3. The low-level signal is converted into a high-level signal through the NOT gate between the first port J(1)1 and the third port J(1)3. The high-level signal enables the display branch to be energized and the indicator light is on, indicating that the control port control relay of this group is disconnected normally.

[0030] In other embodiments, the first port J(1)1 and the third port J(1)3 of each group of control ports inside the charging pile power distribution board can also be directly connected (i.e., without switching through a logic gate), and the fourth port J(1)4 is grounded. When the second control port J(1)2 outputs a high-level signal, the relay is closed, and the indicator light should be on. If the indicator light is on, the control port is normal, and if the indicator light is off, the control port is abnormal; when the second control port J(1)2 outputs a low-level signal, the relay is disconnected, and the indicator light should be off. If the indicator light is off, the control port is normal, and if the indicator light is on, the control port is abnormal. On this basis, the specific test process of using the test device to test the first port J(1)1 and the third port J(1)3 of each group of control ports inside the charging pile through a directly connected power distribution circuit board is as follows: First, the connecting terminals of each test circuit of the device, which are used for being installed on one side of the same component and whose installation positions correspond to each group of control ports on the same side of the power distribution circuit board, are connected to each group of control ports through connecting wires, and the test device is started. After power is turned on, when the test program of the power distribution circuit board is running, the second port J(1)2 is triggered to output a high level signal or a low level signal. If the second port J(1)2 is triggered to output a high level signal, the coil of the relay is energized and the relay contact is closed. Then, after receiving the high level signal, the first terminal J(1)1 sends a high level signal (i.e., feedback signal) to the third port J(1)3. The high level signal directly causes the display branch to lose power and the indicator light turns on, indicating that the control relay of the control port group is normally closed. If the second port J(1)2 is triggered to output a low level signal, the coil of the relay is de-energized and the relay contact is disconnected. Then, the first port J(1)1 sends a feedback signal (low level signal) to the third port J(1)3. The low level signal causes the display branch to lose power and the indicator light turns off, indicating that the control relay of the control port group is normally disconnected.

[0031] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, but do not constitute a limitation to the present invention.

Claims

1. A charging pile power distribution circuit board testing device, characterized in that: It includes test circuits which are installed on one side of the same component and whose installation positions correspond to the control ports on the same side of the power distribution circuit board, so as to be connected to the control ports at the corresponding positions. The test circuit includes a relay branch and a display branch. One end of the branch with relay contacts and the branch with relay coils in the relay branch are respectively used to connect the first port and the second port in the control port through the corresponding connection terminals, and the other end is respectively used to connect the second port and the ground through the corresponding connection terminals, so that the contacts are closed or opened according to the different level signals output by the second port. The display branch with a display unit is used to be connected in series between the third port and the fourth port in the control port through the corresponding connection terminals to form a loop. The display unit is used to display the corresponding test result according to the feedback signal corresponding to the contact closure or disconnection sent from the first port to the third port.

2. The charging pile power distribution circuit board testing device according to claim 1, characterized in that: The coil of the relay is used to be energized according to a high-level signal received from the second port, and to be de-energized according to a low-level signal received from the second port, so that the contacts are closed or opened accordingly.

3. The charging pile power distribution circuit board testing device according to claim 1, characterized in that: The contacts of the relay are used to close when the coil of the relay is energized and to open when the coil of the relay is de-energized; when the contacts of the relay are opened, the feedback signal is a low-level signal, and when the contacts of the relay are closed, the feedback signal is a high-level signal.

4. The charging pile power distribution circuit board testing device according to claim 1, characterized in that: The display unit is an indicator light, which is used to turn on / off according to the feedback signal. When the feedback signal is a high-level signal, the indicator light is off, and when the feedback signal is a low-level signal, the indicator light is on.

5. The charging pile power distribution circuit board testing device according to claim 1, characterized in that: A diode whose conduction direction is the current direction from the second port to the first port is also connected in series on the branch of the contact, and the diode is used to prevent backflow caused by reverse connection of the line.

6. The charging pile power distribution circuit board testing device according to claim 1, characterized in that: The display branch is connected in series with a resistor, and the resistor is used to prevent the voltage at both ends of the indicator light from being too large.

7. The charging pile power distribution circuit board testing device according to claim 1, characterized in that: It also includes a power supply, which is used to connect to the charging pile power distribution circuit board through corresponding connecting terminals to supply power to the charging pile power distribution circuit board.

8. The charging pile power distribution circuit board testing device according to claim 7, characterized in that: It also includes a power indicator device powered by the power supply, which is used to display different states when powered on and not powered on, so as to indicate whether the power supply is normal.

9. The charging pile power distribution circuit board testing device according to any one of claims 1 to 8, characterized in that: It also includes test circuits that are installed on the other side of the same component and whose installation positions correspond one-to-one to the groups of control ports on the other side of the power distribution circuit board. These test circuits contain internal structures consistent with the test circuits that are installed on one side of the same component and whose installation positions correspond one-to-one to the groups of control ports on the same side of the power distribution circuit board.

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