An ex-factory metrological verification and traceability device for a charging detection system of a charging pile

Abstract

The present invention relates to a factory metrological verification and traceability device for a charging detection system of a charging pile, which includes a standard charging pile and a metering device; the metering device includes a communication simulator, an operation processor, a data interface, an electric energy metering module and an analog battery, and the electric energy metering module includes a fixed cable, a current transformer, a voltage transformer and an electric energy metering chip; the present invention takes the standard charging pile as a benchmark. During use, the metering device first charges from the standard charging pile. After charging a specific amount of electricity, the measured value of the electric energy metering module in the metering device is compared with the displayed value of the standard charging pile, and the measured value of the metering device is corrected by using the displayed value of the standard charging pile. Then, the metering device is connected to the charging pile to be tested and charged. After charging a specific amount of electricity, the charging pile to be tested is corrected by using the measured value of the metering device. The present invention can effectively perform traceability detection on the charging piles that are already in use, so that the charging piles can still maintain accuracy after long-term use.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and specifically to an ex-factory metrological verification traceability device for a charging detection system of a charging pile. Background Art

[0002] When a charging pile leaves the factory, it needs to undergo an ex-factory verification of the electric energy metering function by a detection system. After determining that the metering electric energy function of the charging pile is ready, it can leave the factory. Thereby ensuring the accuracy of the charging pile data. However, during the use of the charging pile, the metering function always changes, resulting in inaccurate electric energy metering. At this time, a traceability device is needed to calibrate the charging pile. However, the position of the already used charging pile is fixed and it cannot be sent back to the manufacturer for traceability. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an ex-factory metrological verification traceability device for a charging detection system of a charging pile, which can perform traceability detection on a charging pile that has been fixedly installed and used.

[0004] An ex-factory metrological verification traceability device for a charging detection system of a charging pile according to the present invention includes a standard charging pile and a metering device;

[0005] The metering device includes a communication simulator, an operation processor, a data interface, an electric energy metering module, and an analog battery. The electric energy metering module includes a fixed cable, a current transformer, a voltage transformer, and an electric energy metering chip. The current transformer and the voltage transformer are sleeved on the fixed cable, and a connector is provided at the end of the fixed cable; the connector at one end of the fixed cable is used to connect to the standard charging pile or the charging pile to be tested, and the connector at the other end of the fixed cable is connected to the analog battery; the current transformer and the voltage transformer are connected to the electric energy metering module;

[0006] The communication simulator is connected to the communication interface of the standard charging pile or the charging pile to be tested, and the electric energy metering module, the communication simulator, the data interface, and the analog battery are connected to the operation processor;

[0007] The data interface is used to output test data.

[0008] Further, the operation processor is an STM32 single-chip microcomputer, the model of the electric energy metering chip is CS5460, the current transformer is connected to the current input terminal of the electric energy metering chip, the voltage transformer is connected to the voltage input terminal of the electric energy metering chip, and the electric energy metering chip is connected to the STM32 single-chip microcomputer through an SPI serial data bus.

[0009] Further, the interfaces of the communication simulator and the fixed cable are connected to an analog charging interface, the communication simulator is connected to the communication terminal in the analog charging interface, and the interface of the fixed cable is connected to the power terminal in the analog charging interface.

[0010] Further, the current transformer and the voltage transformer are fixedly arranged on the fixed cable, and the fixed cable adopts a standard charging cable of 32A.

[0011] Further, the data interface includes a USB interface, an RS485 interface, and an RS232 interface.

[0012] The beneficial effects of the present invention are as follows: An ex-factory metrological verification traceability device for a charging detection system of a charging pile according to the present invention uses a standard charging pile as a reference. During use, the quantitative device first charges from the standard charging pile. After charging a specific amount of electricity, the measured value of the electric energy metering module in the quantitative device is compared with the displayed value of the standard charging pile, and the measured value of the quantitative device is corrected using the displayed value of the standard charging pile. Then, the quantitative device is connected to the charging pile to be tested and charged. After charging a specific amount of electricity, the charging pile to be tested is corrected using the measured value of the quantitative device. The present invention can effectively perform traceability detection on the charging piles already in use, enabling the charging piles to maintain the accuracy of electric energy metering after long-term use. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts:

[0014] Figure 1 It is a schematic structural diagram of the present invention. Detailed Embodiments

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application to be protected, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0017] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0018] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0019] As Figure 1 shown: A factory metrological verification and traceability device for a charging detection system of a charging pile in this embodiment includes a standard charging pile and a metering device;

[0020] The metering device includes a communication simulator, an arithmetic processor, a data interface, an electric energy metering module and an analog battery. The communication simulator is used to simulate the BMS battery management system inside an electric vehicle. Since the analog battery has its own self-checking function, the communication simulator only needs to be responsible for operations such as handshaking and connection confirmation with the charging pile according to the communication protocol in this embodiment; so that the charging pile can smoothly release electric energy into the analog battery;

[0021] The electric energy metering module includes a fixed cable, a current transformer, a voltage transformer and an electric energy metering chip. The current transformer and the voltage transformer are sleeved on the fixed cable, and a connector is arranged at the end of the fixed cable;

[0022] The connector at one end of the fixed cable is used to connect to the standard charging pile or the charging pile to be tested, and the connector at the other end of the fixed cable is connected to the analog battery; the current transformer and the voltage transformer are connected to the electric energy metering module;

[0023] The communication simulator is connected to the communication interface of the standard charging pile or the charging pile to be tested, and the electric energy metering module, the communication simulator, the data interface and the analog battery are connected to the arithmetic processor;

[0024] The data interface is used to output test data.

[0025] In use, the metering device is first connected to a standard charging pile. The power terminals inside the charging gun of the standard charging pile are connected to the simulated battery through a fixed cable; the terminals for communication and other functions are connected to a communication simulator. After passing the verification of the communication protocol, the standard charging pile charges the simulated battery with X kWh of electric energy (X is a data set, with no less than 20 test data distributed in each electric energy range), and reads the reading Y of the metering device, and uses X to perform global compensation on the reading Y of the metering device.

[0026] Then, the metering device is connected to the charging pile to be tested, and the connection method is the same as that of the standard charging pile. Then, the simulated battery is charged with X kWh of electric energy through the charging pile to be tested. At this time, the reading of the metering device is Y'. Using Y', it can be measured whether there is an error in the charging pile to be tested, and corrections can be made according to the error.

[0027] In this embodiment, the arithmetic processor is an STM32 single-chip microcomputer, the model of the electric energy metering chip is CS5460. The current transformer is connected to the current input terminal of the electric energy metering chip, the voltage transformer is connected to the voltage input terminal of the electric energy metering chip, and the electric energy metering chip is connected to the STM32 single-chip microcomputer through the SPI serial data bus. The power calculation and integration functions of CS5460 can be used to accurately obtain the electric energy consumption.

[0028] In this embodiment, for the convenience of connection, the interfaces of the communication simulator and the fixed cable are connected to the simulated charging interface. The communication simulator is connected to the communication terminals in the simulated charging interface, and the interface of the fixed cable is connected to the power terminals in the simulated charging interface. According to the type of the charging pile, the simulated charging interface can be divided into a DC interface and an AC interface; the terminals of the DC interface are different from those of the AC interface.

[0029] Among them, the terminals inside the DC interface include a DC positive terminal DC+, a DC negative terminal DC-, a ground wire terminal PE, a first connection confirmation terminal CC1, a second connection confirmation terminal CC2, a positive terminal A+ of the low-voltage auxiliary power supply, a negative terminal A- of the low-voltage auxiliary power supply, a first communication terminal CAN-H, and a second communication terminal CAN-L; the terminals responsible for charging are mainly the DC positive terminal DC+ and the DC negative terminal DC-; therefore, the communication simulator is connected to the first connection confirmation terminal CC1, the second connection confirmation terminal CC2, the first communication terminal CAN-H, and the second communication terminal CAN-L; the simulated power supply is connected to the DC positive terminal DC+, the DC negative terminal DC-, the ground wire terminal PE, the positive terminal A+ of the low-voltage auxiliary power supply, and the negative terminal A- of the low-voltage auxiliary power supply through a fixed cable.

[0030] If the interface is an AC interface, the internal terminals include an AC power terminal L, a first spare terminal NC1, a second spare terminal NC2, a neutral terminal N, a ground terminal PE, a charging confirmation terminal CC, and a control confirmation terminal CP; thus, the communication simulator is connected to the charging confirmation terminal CC and the control confirmation terminal CP, and the simulated power supply is connected to the AC power terminal L, the neutral terminal N, and the ground terminal PE through a fixed cable;

[0031] In this embodiment, the current transformer and the voltage transformer are fixedly arranged on the fixed cable. The fixed cable uses a standard charging cable of 32A. Since the relative position change between the current transformer and the voltage transformer and the cable will cause changes in the measurement results, they are fixed together and connected to the outside in a joint manner.

[0032] In this embodiment, the data interface includes a USB interface, an RS485 interface, and an RS232 interface; the use of the USB interface, the RS485 interface, and the RS232 interface can cover most industrial intelligent devices, facilitating the traceability of the measurement results to be output to external devices for analysis and processing; after processing, the values of the charging piles to be detected can be adjusted.

[0033] For the factory metrological verification and traceability device of a charging detection system for a charging pile according to the present invention, with a standard charging pile as the reference, during use, the metering device first charges from the standard charging pile. After charging a specific amount of electricity, the measured value of the electric energy metering module in the metering device is compared with the displayed value of the standard charging pile, and the measured value of the metering device is corrected using the displayed value of the standard charging pile. Then, the metering device is connected to the charging pile to be measured and charged. After charging a specific amount of electricity, the charging pile to be measured is corrected using the measured value of the metering device. The present invention can effectively perform traceability detection on the charging piles already in use, enabling the charging piles to maintain the accuracy of electric energy metering after long-term use.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An ex-factory metrological verification and traceability device for a charging detection system of a charging pile, characterized in that: It includes a standard charging pile and a metering device; The metering device includes a communication simulator, an arithmetic processor, a data interface, an electric energy metering module, and an analog battery. The electric energy metering module includes a fixed cable, a current transformer, a voltage transformer, and an electric energy metering chip. The current transformer and the voltage transformer are sleeved on the fixed cable, and a connector is provided at the end of the fixed cable; the connector at one end of the fixed cable is used to connect to the standard charging pile or the charging pile to be tested, and the connector at the other end of the fixed cable is connected to the analog battery; the current transformer and the voltage transformer are connected to the electric energy metering module; The communication simulator is connected to the communication interface of the standard charging pile or the charging pile to be tested, and the electric energy metering module, the communication simulator, the data interface, and the analog battery are connected to the arithmetic processor; The data interface is used to output test data; The arithmetic processor is an STM32 single-chip microcomputer, the model of the electric energy metering chip is CS5460, the current transformer is connected to the current input terminal of the electric energy metering chip, the voltage transformer is connected to the voltage input terminal of the electric energy metering chip, and the electric energy metering chip is connected to the STM32 single-chip microcomputer through an SPI serial data bus; The interfaces of the communication simulator and the fixed cable are connected to the analog charging interface. The communication simulator is connected to the communication terminal in the analog charging interface, and the interface of the fixed cable is connected to the power terminal in the analog charging interface.

2. The ex-factory metrological verification and traceability device for the charging detection system of a charging pile according to claim 1, characterized in that: The current transformer and the voltage transformer are fixedly arranged on the fixed cable, and the fixed cable adopts a 32A standard charging cable.

3. A factory metrological verification and traceability device for a charging detection system of a charging pile, characterized in that: The data interface includes a USB interface, an RS485 interface, and an RS232 interface.

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