A serial charging pile automatic aging system

Abstract

This invention relates to a serial automatic aging system for charging piles, comprising an aging station, a main control unit, an electronic load, and charging piles under test. Multiple charging piles under test on the aging station are arranged in a matrix of at least 3x3 rows and columns. Within the matrix, the output terminal of each charging pile under test is connected to the input terminal of the next charging pile under test in parallel, forming a series power transmission loop. Each charging pile under test connected in series within the matrix is ​​connected in parallel with a contactor. The main control unit includes an IPC upper-level control unit, a PLC execution control module, a switching power supply, and a data acquisition module. This invention, through a serial layout, allows mains power to enter from the main control cabinet, pass through each aging station via a series transmission method, and then reach the electronic load, which then feeds back to the power grid. This achieves an overall series topology layout and low-power, high-efficiency aging test, saving space and shortening the control and power loops.

Description

Technical Field

[0001] This invention relates to the field of charging pile testing and aging technology, specifically to a serial automatic aging system for charging piles. Background Technology

[0002] With the widespread adoption of electric vehicles and electric bicycles, the demand for charging stations has increased accordingly. Wherever there are electric vehicles, charging stations are needed, leading to a rapid expansion of the charging station market. This has resulted in increasing demands on the production capacity and efficiency of charging stations. Furthermore, since charging stations typically have a long aging period, multiple charging stations are gradually aging simultaneously, which will dramatically increase energy consumption. Therefore, achieving high production capacity, high efficiency, high safety, and low energy consumption is a key focus that the charging station industry urgently needs to pursue. Summary of the Invention

[0003] Based on this, the purpose of the present invention is to provide a serial automatic aging system for charging piles that improves the overall efficiency of aging tests and ensures high safety, high flexibility and high energy efficiency.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A serial automatic aging system for charging piles, characterized in that it includes an aging station, a main control unit, an electronic load, and multiple charging piles to be tested installed on the aging station.

[0006] The number of aging stations is several, and each aging station is connected in series with an electronic load via a transmission bus. The multiple charging piles under test on the aging stations are arranged in rows and columns to form a matrix of at least 3*3. In the matrix, the output end of the previous charging pile under test is connected to the input end of the next charging pile under test in parallel to form a series power supply transmission circuit. In the matrix, each charging pile under test connected in series is connected in parallel with a contactor.

[0007] The main control unit includes an IPC host control unit, a PLC execution control module, a switching power supply, and a data acquisition module. The number of PLC execution control modules and data acquisition modules is the same as the number of aging stations currently connected in series. Each aging station is connected to an independent PLC execution control module and data acquisition module. The data acquisition module and PLC execution control module are connected to the IPC host control unit via a data bus. The IPC host control unit sends status information acquisition commands to the data acquisition module via the Modbus protocol and periodically collects the status information of each tested charging pile.

[0008] The electronic load is connected in series with the power supply transmission circuit of the aging station. The electronic load is a feedback AC electronic load to realize serial overall load control and changes. The electronic load is connected to the IPC upper master control unit via TCPIP bus data connection, which can feed the monitored energy back to the power grid through the IPC upper master control unit. The interface end of the series power supply transmission circuit in each column of the matrix adopts an independent modular overall plug to realize subsequent matrix expansion and the sustainability of power supply transmission when a single charging pile under test is abnormal.

[0009] The control method for the automatic aging system of the serial charging pile includes:

[0010] S1: Place the charging piles to be tested on the test stations inside the aging cabinet and plug in the overall plug to supply power.

[0011] S2: The IPC host control unit configures the corresponding aging parameters to each PLC execution control module and issues execution instructions;

[0012] S3: The mains power reaches the electronic load after passing through each series aging cabinet. The programmable electronic load is used to control the current magnitude, response time and load slope on the current transmission circuit, and feeds the monitored energy back to the grid through the IPC upper master control unit.

[0013] S4: Each data acquisition module continuously acquires the voltage, current and power parameters generated by the charging pile under test in the corresponding aging cabinet;

[0014] S5: Based on the aging parameters configured by the PLC execution control module in step S2, determine whether there are any abnormalities in the voltage, current and power parameters collected by the data acquisition module in step S4. If there are any abnormalities, proceed to step S6; if there are no abnormalities, proceed to step S7.

[0015] S6: The PLC execution control module controls the contactors on each charging pile under test in the aging cabinet that is currently in an abnormal state in segments. It sequentially short-circuits the contactors connected in parallel with each charging pile under test in the matrix. The current flowing through the short-circuited charging pile under test flows through the contactor to the next charging pile under test in the matrix. During the segmented short-circuiting process of each contactor in the matrix, the data acquisition module continuously collects the voltage, current and power parameters of the current aging cabinet to achieve rapid screening of abnormal charging piles under test in the matrix.

[0016] S7: The collected sets of continuously changing voltage, current and power parameters are transmitted back to the IPC host control unit for storage and management.

[0017] As a preferred technical solution, the main controller is also equipped with a UPS uninterruptible power supply to continuously power the IPC host main control unit.

[0018] As a preferred technical solution, the main controller also includes a combined lighthouse and a buzzer to indicate the working status of the main controller when performing aging tests.

[0019] As a preferred technical solution, in step S5, the PLC execution control module judges the voltage, current and power parameters of the corresponding charging pile under test collected by the data acquisition module. If the voltage drop reaches more than 3% and lasts for more than 10 milliseconds, the PLC execution control module quickly responds, outputs a control signal, and controls the contactor to perform a short-circuit operation. The contactor action isolates the charging pile under test, so that the input current jumps away from the current charging pile under test and is transmitted to the charging pile under test at the next station through the currently connected contactor terminal.

[0020] The beneficial effects of this invention are as follows: Through a serial layout, the mains power enters from the main control cabinet, passes through each aging station via a series transmission method, and then reaches the electronic load. The electronic load then feeds back to the power grid, achieving an overall series topology layout and low-power, high-efficiency aging test. This saves space and shortens the control and power circuits. At the same time, each charging pile under test in each aging station adopts a series power transmission. When a single charging pile under test malfunctions, by connecting a contactor in parallel to each charging pile under test in the matrix, the current abnormal transmission path can be immediately closed, and a bypass transmission of power supply can be achieved. This bypasses the product end of the current station, achieving independent and safe protection of the product at the current station and a series logic without affecting the normal aging of other products. Attached Figure Description

[0021] Figure 1 This is a schematic block diagram of the connection of a serial charging pile automatic aging system according to the present invention.

[0022] Figure 2 This is a schematic block diagram of the aging station in a serial charging pile automatic aging system according to the present invention.

[0023] Figure 3 This is a schematic block diagram of the main control unit in a serial charging pile automatic aging system according to the present invention.

[0024] Figure 4 This is a schematic block diagram showing the connection of the electronic load in an automatic aging system for a serial charging pile according to the present invention.

[0025] Figure 5 This is a schematic block diagram of the contactor connection in an automatic aging system for serial charging piles according to the present invention.

[0026] Figure 6 This is a schematic diagram of the workflow of the control method of the serial charging pile automatic aging system of the present invention.

[0027] Figure 7This is a schematic block diagram showing the connection of the data acquisition module in a serial charging pile automatic aging system according to the present invention.

[0028] Figure 8 This is a schematic diagram of the abnormal voltage drop status at the current workstation in an automatic aging system for serial charging piles according to the present invention.

[0029] Figure 9 This is a schematic diagram illustrating the abnormal status of the current workstation in a serial automatic aging system for charging piles according to the present invention.

[0030] In the diagram: 1-Aging station, 2-Main controller, 2-1-IPC upper control unit, 2-2-PLC execution control module, 2-3-Switching power supply, 2-4-Data acquisition module, 2-5-UPS uninterruptible power supply, 2-6-Combined lighthouse, 2-7-Buzzer, 3-Electronic load, 4-Charging pile under test, 5-Contactor, 6-Integral plug. Detailed Implementation

[0031] To provide a better understanding of the structural features and effects achieved by the present invention, a detailed description is provided below, accompanied by preferred embodiments and accompanying drawings:

[0032] like Figures 1-5 As shown, a serial automatic aging system for charging piles includes an aging station 1, a main control unit 2, an electronic load 3, and multiple charging piles 4 to be tested installed on the aging station 1.

[0033] There are several aging stations 1, and each aging station 1 is connected in series with the electronic load 3 via a transmission bus. The multiple charging piles 4 under test on the aging station 1 are arranged in rows and columns to form a matrix of at least 3*3. In the matrix, the output end of the previous charging pile 4 under test is connected to the input end of the next charging pile 4 under test in parallel with it to form a series power supply transmission circuit. In the matrix, each charging pile 4 under test connected in series is connected in parallel with a contactor 5.

[0034] The main control unit 2 includes an IPC host control unit 2-1, a PLC execution control module 2-2, a switching power supply 2-3, and a data acquisition module 2-4. The number of PLC execution control modules 2-2 and data acquisition modules 2-4 is the same as the number of aging stations 1 currently connected in series. Each aging station 1 is connected to an independent PLC execution control module 2-2 and data acquisition module 2-4. The data acquisition module 2-4 and the PLC execution control module 2-2 are connected to the IPC host control unit 2-1 through a data bus. The IPC host control unit 2-1 sends status information acquisition commands to the data acquisition module 2-4 through the Modbus protocol and periodically acquires the status information of each tested charging pile 4.

[0035] The power supply transmission circuit of electronic load 3 and aging station 1 is connected in series. Electronic load 3 adopts a feedback AC electronic load to realize serial overall load control and changes. Electronic load 3 is connected to IPC upper master control unit 2-1 through TCPIP bus data connection, which can feed back the monitored energy to the power grid through IPC upper master control unit. The interface end of the series power supply transmission circuit in each column of the matrix adopts an independent modular overall plug 6 to realize the subsequent matrix expansion and the sustainability of power supply transmission when a single charging pile under test 4 is abnormal.

[0036] In this embodiment, the main controller 2 is also equipped with a UPS uninterruptible power supply 2-5 to continuously power the IPC upper main control unit 2-1.

[0037] In this embodiment, the main controller 2 also includes a combined lighthouse 2-6 and a buzzer 2-7, which are used to indicate the working status of the main controller 2 when performing aging tests.

[0038] This embodiment also includes a control method for an automatic aging system for serial charging piles, the method comprising the following steps:

[0039] S1: Place the charging piles 4 to be tested on the test station in the aging cabinet 1 and plug in the overall plug 6 to supply power.

[0040] S2: The IPC host control unit 2-1 configures the corresponding aging parameters to each PLC execution control module 2-2 and issues execution instructions;

[0041] S3: The mains power reaches the electronic load 3 after passing through each series aging cabinet 1. The programmable electronic load 3 is used to control the current magnitude, response time and load slope on the current transmission circuit, and feeds the monitored energy back to the grid through the IPC upper master control unit 2-1.

[0042] S4: Each data acquisition module 2-4 continuously acquires the voltage, current and power parameters generated by the charging pile 4 under test in the corresponding aging cabinet 1;

[0043] S5: Based on the aging parameters configured by the PLC execution control module 2-2 in step S2, determine whether there are any abnormalities in the voltage, current and power parameters collected by the data acquisition module 2-4 in step S4. If there are any abnormalities, proceed to step S6; if there are no abnormalities, proceed to step S7.

[0044] S6: The PLC execution control module 2-2 controls the contactors 5 on each charging pile 4 under test in the aging cabinet that is currently in an abnormal state in stages. It sequentially short-circuits the contactors 5 connected in parallel with each charging pile 4 under test in the matrix. The current flowing through the short-circuited charging pile 4 under test flows through the contactor 5 to the next charging pile 4 under test in the matrix. During the staged short-circuiting process of each contactor 5 in the matrix, the data acquisition module 2-4 continuously collects the voltage, current and power parameters of the current aging cabinet 1 to achieve rapid screening of abnormal charging piles 4 under test in the matrix.

[0045] In this embodiment, as Figures 7 to 9 As shown, in step S5, the PLC execution control module 2-2 judges the voltage, current and power parameters of the corresponding charging pile 4 under test collected by the data acquisition module 2-4. If the voltage drop reaches more than 3% and the duration exceeds 10 milliseconds, the PLC execution control module 2-2 quickly responds, outputs a control signal, and controls the contactor 5 to perform a short circuit operation. The contactor 5 isolates the charging pile 4 under test, so that the input current jumps away from the current charging pile 4 under test and is transmitted to the charging pile 4 under test at the next station through the currently connected contactor 5 terminal.

[0046] Furthermore, if the input voltage of the charging pile 4 under test at the current workstation fluctuates by less than 5%, it will not affect the continuous power supply of the product; regarding the output voltage, if the output voltage drop reaches a decrease of more than 3% and lasts for more than 10 milliseconds (i.e., attached...), it will not affect the continuous power supply of the product. Figure 9 At time node T1 (as shown), the PLC execution control module 2-2 quickly responds and outputs a control signal to control contactor 5 to perform a short-circuit operation (the time node for performing the short-circuit operation is shown in the attached diagram). Figure 9 As shown at time node T2 (the time interval between T1 and T2 is 2 milliseconds), when contactor 5 performs a short circuit operation on the charging pile 4 under test at the current workstation, the charging pile 4 under test at the back-end workstation under test will resume power supply at time T3 (the time interval between T2 and T3 is 2 milliseconds). At the same time, data acquisition modules 2-4 upload and record the information of the charging pile 4 under test at the current abnormal workstation.

[0047] In this embodiment, the combined lighthouse 2-6 and buzzer 2-7 of the main controller 2 are mainly used to indicate the status of the main controller 2. Under normal conditions, the combined lighthouse 2-6 is green. When power is supplied and aging tests are performed, the combined lighthouse 2-6 is yellow. When the main controller 2 itself malfunctions or the entire system malfunctions, the combined lighthouse 2-6 will light up red and the buzzer will be activated. Through a serial layout, the mains power enters from the main controller 2, passes through each aging station 1 in series, and then reaches the electronic load 3. The electronic load 3 then feeds back to the power grid, realizing the overall... The series topology and low-power, high-efficiency aging test save space and shorten the control and power circuits. At the same time, each charging pile 4 under test in each aging station 1 adopts series power transmission. When a single charging pile 4 under test has an abnormal state, by connecting each charging pile 4 under test in parallel with a contactor 5, the current abnormal transmission path can be closed immediately and the power transmission can be bypassed, thus bypassing the product end of the current station. This achieves independent and safe protection of the product at the current station and series logic without affecting the normal aging of other products.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A serial charging pile automatic aging system, characterized in that, The aging station, the host computer, the electronic load and a plurality of to-be-tested charging piles arranged on the aging station are included, The aging station is connected with the electronic load through a transmission bus after being connected in series between the aging stations, and the plurality of to-be-tested charging piles arranged on the aging station are arranged in a matrix of at least 3*3 in a row and column arrangement mode, the output end of a previous to-be-tested charging pile in the matrix is connected with the input end of a next to-be-tested charging pile in parallel to form a series power transmission loop, and each to-be-tested charging pile connected in series is connected in parallel with a contactor. The host computer includes an IPC upper host control unit, a PLC execution control module, a switching power supply and a data acquisition module, the number of the PLC execution control module and the data acquisition module is the same as the number of the aging stations connected in series, each aging station is connected with an independent PLC execution control module and a data acquisition module respectively, the data acquisition module and the PLC execution control module are connected with the IPC upper host control unit through a data bus, and the IPC upper host control unit sends a state information acquisition command to the data acquisition module through a Modbus protocol and acquires state information of each to-be-tested charging pile periodically. The electronic load is connected in series with the power transmission loop of the aging station, the electronic load is an AC electronic load capable of feedback, is used for realizing serial overall load control and change, and is connected with the IPC upper host control unit through a TCPIP bus data to feed back monitored energy to a power grid through the IPC upper host control unit; and an interface end of the series power transmission loop in each column of the matrix adopts an independent modular overall plug to realize sustainability of power transmission when a subsequent matrix is expanded and a single to-be-tested charging pile is abnormal. The control method of the serial charging pile automatic aging system includes the following steps: S1: placing the to-be-tested charging piles on test stations in the aging cabinet and inserting the overall plug for power supply; S2: the IPC upper host control unit configures corresponding aging parameters for each PLC execution control module and sends an execution instruction; S3: the city power reaches the electronic load after passing through each series aging cabinet, the program-controlled electronic load is used to control the current size, response time and load slope on the current transmission loop, and feeds back monitored energy to the power grid through the IPC upper host control unit; S4: each data acquisition module acquires voltage, current and power parameters generated by the to-be-tested charging piles in the corresponding aging cabinet uninterruptedly; S5: whether the voltage, current and power parameters acquired by the data acquisition module in step S4 are abnormal is judged according to the aging parameters configured by the PLC execution control module in step S2, if the parameters are abnormal, step S6 is executed, and if the parameters are not abnormal, step S7 is executed. S6: the PLC execution control module performs control module segment control of the contactors on each to-be-tested charging pile in the aging cabinet currently having an abnormal state, sequentially performs short-circuit operation on the contactors in the matrix parallel to each to-be-tested charging pile, the current flowing through the to-be-tested charging pile being short-circuited flows to the next to-be-tested charging pile in the matrix through the contactor, and the data acquisition module uninterruptedly collects the voltage, current and power parameters of the current aging cabinet in the process of performing segment short-circuit operation on each contactor in the matrix, so as to realize rapid screening of abnormal to-be-tested charging piles in the matrix; S7: the collected multiple groups of continuously changed voltage, current and power parameters are returned to the IPC upper host control unit for storage management.

2. The automatic aging system of a serial charging pile according to claim 1, characterized in that: The main control machine is also provided with a UPS uninterruptible power supply for continuously supplying power to the IPC upper host control unit.

3. The automatic aging system of a serial charging pile according to claim 2, characterized in that: The main control machine further comprises a combined lighthouse and a peak squealer for indicating the working state of the main control machine when performing aging test.

4. The automatic aging system of a serial charging pile according to claim 1, characterized in that: In step S5, the PLC execution control module judges according to the voltage, current and power parameters of the corresponding to-be-tested charging pile collected by the data acquisition module, if the voltage drop is more than 3% and the duration is more than 10 milliseconds, the PLC execution control module quickly gives a response, outputs a control signal, controls the contactor to perform short-circuit operation, the contactor action isolates the to-be-tested charging pile, and the input current jumps the current to-be-tested charging pile and is input to the to-be-tested charging pile on the next work station through the current parallel contactor end.

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