V2G double-gun charging pile metering self-checking control method, system and equipment

Abstract

The invention relates to a V2G double-gun charging pile metering self-checking control method, system and device. The method comprises the following steps: controlling a double-gun intercommunication relay to be closed in response to a self-checking starting instruction; controlling the first charging gun module to discharge outwards at a preset voltage and a preset current, and acquiring actual discharging data of the first charging gun module; the second charging gun module is controlled to charge the pair with a preset current and a preset current, and actual charging data of the second charging gun module is obtained; responding to the self-checking ending instruction, and controlling the double-gun intercommunication relay to be switched off; and under the condition that the metering error between the actual discharging data and the actual charging data exceeds the corresponding metering error range, determining a metering self-checking fault. By adopting the technical scheme, the closing of the double-gun intercommunication relay can be controlled to control the V2G double-gun charging pile to discharge and charge, so that the metering inspection of the charging pile is realized, an additional electricity meter and a complex circuit do not need to be additionally arranged, and the metering self-inspection of the charging pile can be conveniently realized.

Description

Technical Field

[0001] The present application relates to the technical field of charging piles, and in particular to a control method, system and device for metering self-checking of a V2G dual-gun charging pile. Background Art

[0002] V2G (Vehicle-to-Grid) charging pile is an advanced charging device that can not only charge electric vehicles, but also feed the electrical energy in the electric vehicle battery back to the power grid, realizing two-way flow of electricity.

[0003] The metering module is the core module of the charging pile, which is mainly used to measure and record the power consumption during the charging process. The metering accuracy of the metering module determines the various protections of the charging pile and the accuracy of the charging pile billing.

[0004] In the related art, in order to ensure the accuracy of the metering module, it is necessary to add additional electric meters and complex circuits to perform metering checks on the metering module. However, metering checks performed in this way are difficult to operate and prone to errors, so improvements are needed. Summary of the invention

[0005] In order to facilitate the metering inspection of charging piles, the present application improves the control method, system and equipment for metering self-inspection of V2G dual-gun charging piles.

[0006] In the first aspect, the present application provides a control method for metering self-check of a V2G dual-gun charging pile, which adopts the following technical solution: A control method for metering self-check of a V2G dual-gun charging pile is used in a charging pile, wherein the charging pile comprises a first charging gun module, a second charging gun module and a dual-gun intercommunication relay, wherein the dual-gun intercommunication relay is used to connect the first charging gun module and the second charging gun module, and the dual-gun intercommunication relay is in a normally open state, and the method comprises: In response to the start self-test instruction, controlling the dual-gun intercommunication relay to close so that the first charging gun module and the second charging gun module are electrically connected; Controlling the first charging gun module to discharge at a preset voltage and a preset current, and obtaining actual discharge data of the first charging gun module, where the actual discharge data is recorded by a metering module corresponding to the first charging gun module; Control the second charging gun module to charge internally with the preset current and the preset current pair, and obtain actual charging data of the second charging gun module, where the actual charging data is recorded by a metering module corresponding to the second charging gun module, and a type of the actual charging data corresponds to a type of the actual discharging data; In response to the end self-test instruction, controlling the dual-gun intercommunication relay to be disconnected, so that the electrical connection between the first charging gun module and the second charging gun module is disconnected; calculating a measurement error between the actual discharge data and the actual charge data; In the case where the metering error exceeds the corresponding metering error range, a metering self-test fault is determined.

[0007] By adopting the above technical solution, the closing of the dual-gun intercommunication relay can be controlled to control the V2G dual-gun charging pile to discharge and charge, and the metering check of the charging pile can be realized based on the metering error between the actual discharge data and the actual charging data, without adding additional electric meters and complex circuits, thereby facilitating the metering self-inspection of the charging pile.

[0008] Optionally, the actual discharge data includes an actual discharge amount, the actual charge data includes an actual charge amount, and the metering error includes a difference in quantity between the actual discharge amount and the actual charge amount; when the metering parameter exceeds a corresponding metering error threshold, determining a metering self-check fault includes: Determining whether the power difference exceeds a power error range; When the electric quantity difference exceeds the electric quantity error range, a metering self-test fault is determined.

[0009] By adopting the above technical solution, metering self-check can be performed directly based on the difference between the actual discharge amount and the actual charge amount. In this way, it can be judged from the dimension of power metering whether there is a large error in the metering module of the charging pile, which can help to accurately realize metering self-check.

[0010] Optionally, the actual discharge data includes actual discharge power, the actual charging data includes actual charging power, the measurement error includes a power difference between the actual discharge power and the actual charging power, and after determining whether the current charging value exceeds a current error range, further comprising: If the power difference does not exceed the power error range, determining whether the power difference exceeds the power error range; When the power difference exceeds the power error range, a metering self-test fault is determined.

[0011] By adopting the above technical solution, when the power error does not exceed the power error range, a metering self-check can be further performed based on the difference between the actual discharge power and the actual charging power. In this way, it can be combined with the power metering to determine whether there is a large error in the metering module of the charging pile, which can help improve the accuracy of the metering self-check results.

[0012] Optionally, the actual discharge data includes an actual discharge current and an actual discharge voltage, the actual charge data includes an actual charge current and an actual charge voltage, the measurement error includes a current difference between the actual discharge current and the actual charge current and a voltage difference between the discharge charge voltage and the actual charge current; after determining whether the power difference exceeds a power error range, the method further includes: In a case where the power difference does not exceed the power error range, determining whether the current difference exceeds the current error range and whether the voltage difference exceeds the voltage error range; In the case where the current difference exceeds the current error range and / or the voltage difference exceeds the voltage error range, a metering self-test fault is determined.

[0013] By adopting the above technical solution, when the power difference does not exceed the power error range, it can be determined whether the metering module of the charging pile has a large error by combining current and voltage measurement, which can help to further improve the accuracy of the self-test results.

[0014] Optionally, after determining the metering self-test fault, the method further includes: Determine a charging gun module to be corrected between the first charging gun module and the second charging gun module; Determining a metrology calibration method of the charging gun module to be corrected in combination with the metrology error; The metrology parameters of the charging gun module to be corrected are adjusted based on the metrology calibration method.

[0015] By adopting the above technical solution, the charging gun module to be corrected can be determined when a metering self-test fault is determined, and the metering parameters of the charging gun module to be corrected can be adjusted in combination with the metering calibration method determined based on the metering error. In this way, automatic recovery of the metering fault can be achieved, which can help improve the degree of automation of charging pile operation and maintenance.

[0016] Optionally, after adjusting the metrology parameters of the charging gun to be corrected based on the metrology calibration method, the method further includes: Generate the self-check start instruction and start recording the check duration; When the verification time reaches a preset verification time threshold, generating the end self-check instruction; When the metrology parameter does not exceed the corresponding metrology error range, it is determined that the metrology calibration is successful.

[0017] By adopting the above technical solution, after the metering parameters of the charging gun to be corrected are adjusted, the start self-test instruction and the end self-test instruction can be automatically generated to confirm the verification result, and when the metering parameters do not exceed the corresponding metering error range, it is determined that the metering calibration is successful, thereby ensuring the effectiveness of the automatic metering calibration.

[0018] Optionally, the first energy storage device corresponding to the first charging gun module and the second energy storage device corresponding to the second charging gun module are separately provided, and after responding to the instruction to start the self-test, the method further includes: disconnecting the charging pile from the mains, and recording the power of the first energy storage device before the self-test and the power of the second energy storage device before the self-test; After responding to the end self-test instruction, the method further includes: recording the current of the first energy storage device after the test and the power of the second energy storage device after the self-test; The actual discharge data includes an actual discharge amount, the actual charge data includes an actual charge amount, and the determining of a charging gun to be corrected between the first charging gun module and the second charging gun module includes: Determine a power reduction amount of the first energy storage device based on the power before self-test and the power after self-test of the first energy storage device, and determine whether the first charging gun module is the charging gun module to be corrected based on the power reduction amount and the actual discharge amount; The power increase of the first energy storage device is determined based on the power before self-test and the power after self-test of the second energy storage device, and whether the second charging gun module is the charging gun module to be corrected is determined based on the power increase and the actual discharge amount.

[0019] By adopting the above technical solution, in the case of a metering self-test failure, the charging gun module to be corrected can be further determined, thereby facilitating adjustment of the metering module with a fault, and further facilitating automatic recovery of the metering module fault.

[0020] In the second aspect, the present application provides a V2G dual-gun charging pile, which adopts the following technical solution: A V2G dual-gun charging pile, the charging pile comprising a first charging gun module, a second charging gun module, a dual-gun intercommunication relay and a controller, the controller being respectively connected to the first charging gun module, the second charging gun module and the dual-gun intercommunication relay by signal, the dual-gun intercommunication relay being used to connect the first charging gun module and the second charging gun module, and the dual-gun intercommunication relay being in a normally open state; The controller is used for any one of the V2G dual-gun charging pile metering self-check control methods provided in the first aspect.

[0021] Optionally, the first charging gun module includes a first sub-transmission module, the second charging gun module includes a second sub-transmission module, and the first sub-transmission module and the second sub-transmission module are connected via the dual-gun interactive relay.

[0022] In a third aspect, the present application provides an electronic device, which adopts the following technical solution: An electronic device, comprising: at least one processor; Memory; At least one application, wherein at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute any one of the V2G dual-gun charging pile metering self-check control methods provided in the first aspect.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The closing of the dual-gun intercommunication relay can be controlled to control the V2G dual-gun charging pile to discharge and charge, and the metering check of the charging pile can be realized based on the metering error between the actual discharge data and the actual charging data, without adding additional meters and complex circuits, thereby facilitating the metering self-check of the charging pile.

[0024] 2. The metering self-check can be performed directly based on the difference between the actual discharge amount and the actual charge amount. In this way, it can be judged from the dimension of power metering whether there is a large error in the metering module of the charging pile, which can help to accurately realize the metering self-check. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of a control method for metering self-check of a V2G dual-gun charging pile provided in an embodiment of the present application; Figure 2 It is a flow chart of a method for determining a metering fault provided in an embodiment of the present application; Figure 3 It is a flow chart of a metering fault self-recovery method provided in an embodiment of the present application; Figure 4 It is a structural schematic diagram of a V2G dual-gun charging pile provided in an embodiment of the present application; Figure 5 It is a schematic diagram of the connection method of the double-gun interactive relay provided in the embodiment of the present application; Figure 6 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-6It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] An embodiment of the present application discloses a control method for metering self-inspection of a V2G dual-gun charging pile, which is used in a charging pile. The charging pile includes a first charging gun module, a second charging gun module and a dual-gun intercommunication relay. The dual-gun intercommunication relay is used to connect the first charging gun module and the second charging gun module. The dual-gun intercommunication relay is in a normally open state.

[0028] refer to Figure 1 , the control method of V2G dual-gun charging pile metering self-check includes: Step 101, in response to a start self-test instruction, control the dual-gun intercommunication relay to close so that the first charging gun module and the second charging gun module are electrically connected.

[0029] The start self-check instruction is used to instruct the charging pile to start self-checking. Specifically, the start self-check instruction may be generated when a self-checking control set on the charging pile is triggered, or may be sent to the charging pile by other devices, which is not limited here.

[0030] In one example, since the dual-gun intercommunication relay is in a normally open state, the way to control the dual-gun intercommunication relay to close is to control the dual-gun intercommunication relay to be energized so that the contacts of the dual-gun intercommunication relay are closed, thereby electrically connecting the first charging gun module and the second charging gun module.

[0031] In this embodiment, each charging gun module corresponds to a charging gun. During the self-test process, the first charging gun module is controlled to discharge and the second charging gun module is controlled to charge. The first charging gun module and the second charging gun module can be specified in the self-test instruction, or can be pre-set, or can be randomly determined.

[0032] Step 102 , controlling the first charging gun module to discharge at a preset voltage and a preset current, and obtaining actual discharge data of the first charging gun module.

[0033] The actual discharge data is recorded by the metering module corresponding to the first charging gun module. Specifically, the actual discharge data may include at least one discharge-related parameter such as actual discharge amount, actual discharge power, actual discharge voltage, and actual discharge current.

[0034] In one example, when the actual discharge data includes multiple types, the metering module monitors different actual discharge data separately. For example, the metering result of the actual discharge power will not be affected by the metering results of the actual discharge current and the actual discharge voltage. In this way, different types of data can be combined for comprehensive analysis during the self-test process.

[0035] It should be noted that the preset voltage and preset current are data set in the charging pile, which are used to control the discharge of the first charging gun module. However, due to various factors in the actual charging process, the actual discharge situation of the first charging gun may change, and the actual discharge data may differ from the expected discharge state. Therefore, it is necessary to obtain the actual discharge data.

[0036] Step 103 , control the second charging gun module to charge internally with a preset current and a preset current pair, and obtain actual charging data of the second charging gun module.

[0037] The actual charging data is recorded by the metering module corresponding to the second charging gun module, and the type of the actual charging data corresponds to the type of the actual discharge data. Specifically, the actual charging data may include at least one charging-related parameter such as the actual charging amount, the actual charging power, the actual charging voltage, and the actual charging current.

[0038] In this embodiment, the preset voltage and the preset current are also used to control the charging of the second charging gun module. Specifically, since the second charging gun module is charged by the first charging gun module, theoretically, the charging condition of the second charging gun should correspond to the discharging condition of the first charging gun. In order to avoid the influence of the control difference in the charging and discharging process on the self-test result, the charging control parameters of the second charging gun are set to be consistent with the discharging control parameters of the first charging gun. At the same time, in the actual charging process, the actual discharging condition of the first charging gun may not be fixed, so it is necessary to obtain the actual charging data.

[0039] Step 104 , in response to the end self-test instruction, control the dual-gun intercommunication relay to be disconnected, so that the electrical connection between the first charging gun module and the second charging gun module is disconnected.

[0040] The end self-test instruction is used to instruct the charging pile to end the self-test. Specifically, the end self-test instruction may be generated when a self-test control set on the charging pile is triggered during the self-test process, or may be sent to the charging pile by other devices, which is not limited here.

[0041] In this embodiment, since the dual-gun intercommunication relay is in a normally open state, the method for controlling the closing of the dual-gun intercommunication relay is to control the dual-gun intercommunication relay to cut off the power so that the contact of the dual-gun intercommunication relay is disconnected, thereby disconnecting the electrical connection between the first charging gun module and the second charging gun module.

[0042] Step 105, calculating the measurement error between the actual discharge data and the actual charge data.

[0043] Specifically, since the self-test process is performed by discharging to the outside through the first charging gun module and charging to the inside through the second charging gun module, the actual functional parameters and the actual charging data are generally similar under normal circumstances, for example, the actual discharge amount is approximately equal to the actual charge amount. However, due to possible errors in the metering module, the actual discharge data and the actual charging data are both collected by the metering module, so the metering error can be determined based on the difference between the actual discharge data and the actual charging data.

[0044] In one example, calculating the metering error between the actual discharge data and the actual charge data includes: determining an absolute value of a difference between the actual discharge data and the actual charge data as the metering error.

[0045] In another example, the measurement error between the actual discharge data and the actual charging data of the baseband includes: determining the absolute value of the difference between the actual discharge data and the actual charging data as the error value; calculating the average value of the actual discharge data and the actual charging data; and determining the ratio of the error value to the average value as the measurement error.

[0046] Step 106: When the metering error exceeds the corresponding metering error range, determine a metering self-test fault.

[0047] The measurement error range is determined based on the reasonable error of the measurement module and the reasonable loss of the power conversion process. The measurement errors corresponding to different types of charge and discharge data are set separately.

[0048] Specifically, when the metering parameter exceeds the corresponding metering error range, it means that the gap between the actual discharge data and the actual charging data is too large, which means that at least one of the first charging gun module and the second charging gun module has a metering fault.

[0049] Optionally, the metering error range is set based on an error threshold, and accordingly, when the metering error is greater than the corresponding error threshold, it is determined that the metering error exceeds the corresponding metering error range.

[0050] Furthermore, the error threshold can be set based on the size relationship between the actual discharge data and the actual charge data, for example, when the actual discharge data is greater than the actual charge data, the first error threshold is used; when the actual discharge data is less than the actual charge data, the second error threshold is used, and the first error threshold is greater than the second error threshold. This can help to further improve the accuracy of fault judgment.

[0051] Optionally, after determining the metering self-check fault, the method further includes: outputting self-check fault prompt information. In actual implementation, the self-check fault prompt information includes actual discharge data and actual charge data.

[0052] The implementation principle of the control method of the metering self-check of the V2G dual-gun charging pile provided in the embodiment of the present application is: in response to the start self-check instruction, control the dual-gun intercommunication relay to close; control the first charging gun module to discharge externally at a preset voltage and preset current, and obtain the actual discharge data of the first charging gun module; control the second charging gun module to charge internally at a preset current and preset current, and obtain the actual charging data of the second charging gun module; in response to the end self-check instruction, control the dual-gun intercommunication relay to disconnect; calculate the metering error between the actual discharge data and the actual charging data; when the metering error exceeds the corresponding metering error range, determine the metering self-check fault. By adopting the above technical solution, the closure of the dual-gun intercommunication relay can be controlled to control the V2G dual-gun charging pile to discharge and charge, and the metering check of the charging pile can be realized based on the metering error between the actual discharge data and the actual charging data, without the need to add additional electric meters and complex circuits, thereby facilitating the metering self-check of the charging pile.

[0053] In some embodiments, the actual discharge data includes an actual discharge amount, the actual charge data includes an actual charge amount, and the measurement error includes a charge difference between the actual discharge amount and the actual charge amount.

[0054] The actual discharge amount refers to the discharge amount during this self-test process recorded by the metering module corresponding to the first charging gun module.

[0055] The actual charging capacity refers to the charging capacity during this self-test process recorded by the metering module corresponding to the second charging gun module.

[0056] The capacity difference refers to the absolute value of the difference between the actual discharge capacity and the actual charge capacity.

[0057] Accordingly, reference Figure 2 Step 106, when the metering error exceeds the corresponding metering error range, determining a metering self-test fault includes the following steps: Step 201, determining whether the power difference exceeds a power error range.

[0058] Specifically, since the second charging gun module is charged directly through the first charging gun module during the self-test process, theoretically the actual discharge amount and the actual charging amount are roughly the same. Since the actual discharge amount is recorded by the metering module corresponding to the first charging gun module, and the actual discharge amount is recorded by the metering module corresponding to the second charging gun, the accuracy of the metering module can be self-checked based on the difference in power.

[0059] In this implementation, the manner of determining whether the power difference exceeds the power error range can be analogous to the specific implementation corresponding to the above step 106, which will not be described in detail here.

[0060] Step 202: When the power difference exceeds the power error range, determine that a metering self-test fault occurs.

[0061] Specifically, when the power difference exceeds the power error range, it means that there is a large gap between the actual discharge amount and the actual charge amount, which is most likely caused by the error of the metering module. Therefore, the metering self-test failure can be directly determined.

[0062] Furthermore, in step 202, when it is determined that a metering self-test fault occurs, it can be further determined that the cause of the fault includes abnormal electricity metering.

[0063] In the above technical solution, metering self-check can be performed directly based on the difference between the actual discharge amount and the actual charge amount. In this way, it can be judged from the dimension of power metering whether there is a large error in the metering module of the charging pile, which can help to accurately realize metering self-check.

[0064] Furthermore, the actual discharge data includes the actual discharge power, the actual charge data includes the actual charge power, and the measurement error includes the power difference between the actual discharge power and the actual charge power.

[0065] The actual discharge power refers to the discharge power during the current self-test process recorded by the metering module corresponding to the first charging gun module. Specifically, the actual discharge power may be the average value or maximum value of the discharge power of the first charging gun module during the current self-test process.

[0066] The actual charging power refers to the charging power during this self-test process recorded by the metering module corresponding to the second charging gun module. The actual charging power is determined in the same way as the actual discharge power.

[0067] Accordingly, continue to refer to Figure 2 , step 201, after determining whether the current charging value exceeds the current error range, the following steps are also included: Step 203: When the power difference does not exceed the power error range, determine whether the power difference exceeds the power error range.

[0068] Specifically, since the second charging gun module is charged directly through the first charging gun module during the self-test process, theoretically the actual discharge power and the actual charging power are roughly the same. Since the actual discharge power is recorded by the metering module corresponding to the first charging gun module, and the actual discharge power is recorded by the metering module corresponding to the second charging gun, the accuracy of the metering module's measurement can be self-checked based on the difference in power.

[0069] In this implementation manner, the manner of determining whether the power difference exceeds the power error range can be analogous to the specific implementation manner corresponding to the above step 106, which will not be described in detail herein.

[0070] Step 204: When the power difference exceeds the power error range, a metering self-test fault is determined.

[0071] Specifically, when the power difference exceeds the power error range, it means that there is a large gap between the actual discharge power and the actual charging power, which is most likely caused by the error of the metering module. Therefore, the metering self-test failure can be directly determined.

[0072] Furthermore, in step 204, when it is determined that a metering self-test fault occurs, it may be further determined that the cause of the fault includes abnormal power metering.

[0073] In the above technical solution, when the power error does not exceed the power error range, a metering self-check is further performed based on the difference between the actual discharge power and the actual charging power. In this way, it can be combined with the power metering to determine whether there is a large error in the metering module of the charging pile, which can help improve the accuracy of the metering self-check results.

[0074] Furthermore, the actual discharge data includes the actual discharge current and the actual discharge voltage, the actual charge data includes the actual charge current and the actual charge voltage, and the measurement error includes the current difference between the actual discharge current and the actual charge current and the voltage difference between the discharge charge voltage and the actual charge current.

[0075] The actual charging current and the actual charging voltage are recorded by the metering module corresponding to the first charging gun module during this self-test process.

[0076] The actual discharge current and the actual discharge voltage are recorded by the metering module corresponding to the second charging gun module during this self-test process.

[0077] Accordingly, continue to refer to Figure 2 , step 203, after determining whether the power difference exceeds the power error range, further comprising: Step 205 : When the power difference does not exceed the power error range, determine whether the current difference exceeds the current error range and whether the voltage difference exceeds the voltage error range.

[0078] Specifically, since the second charging gun module is charged directly through the first charging gun module during the self-test process, in theory the actual discharge current is approximately the same as the actual charging current, and the actual discharge voltage is approximately the same as the actual charging voltage. Since the actual discharge current and the actual discharge voltage are recorded by the metering module corresponding to the first charging gun module, and the actual discharge current and the actual discharge voltage are recorded by the metering module corresponding to the second charging gun module, the accuracy of the metering module can be self-checked based on the current difference and the voltage difference.

[0079] In this implementation, the manner of determining whether the power difference exceeds the power error range can be analogous to the specific implementation corresponding to the above step 106, which will not be described in detail here.

[0080] Step 206: When the current difference exceeds the current error range and / or the voltage difference exceeds the voltage error range, determine that a metering self-test fault occurs.

[0081] Optionally, when the current difference does not exceed the current error range and the voltage difference does not exceed the voltage error range, it can be determined that the metering self-check is normal.

[0082] Specifically, when the current difference exceeds the current error range and / or the voltage difference exceeds the voltage error range, it means that there is a large gap between the actual discharge current and the actual full charge current and / or between the actual discharge voltage and the time charging voltage, which is most likely caused by the error of the metering module. Therefore, the metering self-test failure can be directly determined.

[0083] Furthermore, in step 202, when a metering self-test fault is determined, it can be further determined that the cause of the fault includes abnormal current and / or voltage metering.

[0084] In the above technical solution, when the power difference does not exceed the power error range, a metering self-check is further performed based on the difference between the actual discharge current and the actual charging current and the difference between the actual discharge voltage and the actual charging voltage. In this way, it can be determined whether there is a large error in the metering module of the charging pile in combination with the current and voltage metering, which can help to further improve the accuracy of the self-check results.

[0085] In some embodiments, reference Figure 3 In step 106, after determining the metering self-test fault, the following steps are also included: Step 301 : determining a charging gun module to be corrected between a first charging gun module and a second charging gun module.

[0086] Specifically, when a metering self-test failure is determined, it means that at least one of the first charging gun module and the second charging gun module has a metering error. In order to correct the metering error of the charging gun module, it is necessary to first determine the charging gun to be corrected.

[0087] In one example, the first energy storage device corresponding to the first charging gun module and the second energy storage device corresponding to the second charging gun module are separately provided, and after responding to the start self-test instruction, it also includes: disconnecting the charging pile from the mains, recording the power of the first energy storage device before self-test and the power of the second energy storage device before self-test. After responding to the end self-test instruction, it also includes: recording the current of the first energy storage device after detection and the power of the second energy storage device after self-test.

[0088] Correspondingly, the actual discharge data includes the actual discharge amount, and the actual charging data includes the actual charging amount. The charging gun to be corrected is determined between the first charging gun module and the second charging gun module, including: determining the power reduction of the first energy storage device based on the power before self-test and the power after self-test of the first energy storage device, and determining whether the first charging gun module is the charging gun module to be corrected based on the power reduction and the actual discharge amount; determining the power increase of the first energy storage device based on the power before self-test and the power after self-test of the second energy storage device, and determining whether the second charging gun module is the charging gun module to be corrected based on the power increase and the actual discharge amount.

[0089] In the above example, since the connection between the charging pile and the mains is disconnected during the self-test process, the power reduction refers to the power output by the first energy storage device through the first charging gun module during this self-test process; the power increase refers to the power charged into the second energy storage device through the second charging gun module during this self-test process.

[0090] Optionally, determining whether the first charging gun module is a charging gun module to be corrected based on the power reduction amount and the actual discharge amount includes: determining whether the power reduction amount is greater than the actual discharge amount; if so, determining that the first charging gun module is a charging gun module to be corrected when the difference between the power reduction amount and the actual discharge amount is greater than a first power threshold; if not, the first charging gun module can be directly determined to be a charging gun module to be corrected, or, the first charging gun module can be determined to be a charging gun module to be corrected when the difference between the actual discharge amount and the power reduction amount is greater than a second power threshold, and the first power threshold is greater than the second power threshold.

[0091] Optionally, determining whether the second charging gun module is a charging gun module to be corrected based on the amount of power increase and the actual amount of power discharge includes: determining whether the actual charge amount is greater than the amount of power increase; if so, determining that the second charging gun module is a charging gun module to be corrected when the difference between the actual charge amount and the amount of power increase is greater than a first power threshold; if not, the second charging gun module can be directly determined to be a charging gun module to be corrected, or, the second charging gun module can be determined to be a charging gun module to be corrected when the difference between the actual discharge amount and the amount of power increase is greater than a second power threshold.

[0092] In the above example, since it is possible to determine whether the corresponding charging gun module is the charging gun module to be corrected based on the changes in the power of the energy storage device and the changes in the power recorded by the metering module, in the case of a metering self-test failure, the charging gun module to be corrected can be further determined, thereby facilitating the adjustment of the faulty metering module, and further helping to achieve automatic recovery of the metering module failure.

[0093] In another example, the charging pile also includes a verification and metering module connected to the dual-gun intercommunication relay, and determines the charging gun to be corrected from the first charging gun module and the second charging gun module, including: obtaining the verification and metering data collected by the verification and metering module during this self-test process, and the type of the verification and metering data corresponds to the type of the actual discharge data; based on the verification and metering data, determining abnormal data from the actual discharge data and the actual charging data, and determining the charging gun module corresponding to the abnormal data as the charging gun module to be corrected.

[0094] Optionally, determining abnormal data from actual discharge data and actual charging data based on verification metering data includes: respectively determining the difference between actual discharge data and actual charging data and verification metering data; and determining the data with the largest difference from the verification metering data as the data to be corrected. For example: the actual discharge data includes the actual discharge amount, the actual charging data includes the actual charging amount, and the verification metering data includes the verification power-on amount. Accordingly, when the difference between the actual discharge amount and the verification power-on amount is large, the first charging gun module is determined to be the charging gun module to be corrected, and when the difference between the actual charging amount and the verification power-on amount is large, the second charging gun module is determined to be the charging gun module to be corrected.

[0095] Step 302: Determine the measurement calibration method of the charging gun module to be corrected in combination with the measurement error.

[0096] Optionally, the metrology calibration method of the charging gun module to be corrected is determined in combination with the metrology error, including: determining the calibration direction based on the type of the metrology error; and determining the metrology calibration method based on the size of the metrology error and the calibration direction.

[0097] The calibration direction is used to indicate whether to increase or decrease the measurement parameter. Specifically, the corresponding relationship between the measurement error and the measurement parameter is preset.

[0098] The metrological calibration method includes a calibration direction and a calibration amplitude. In one example, the correspondence between the calibration amplitude and the magnitude of the metrological error is preset, for example, it is preset during the delivery of the metrological module. Furthermore, the calibration amplitude is also related to the calibration direction, that is, there are differences in the correspondence between different calibration methods. At this time, the calibration amplitude needs to be determined in combination with the magnitude of the metrological error and the calibration direction.

[0099] Step 303: adjusting the metrology parameters of the charging gun module to be corrected based on the metrology calibration method.

[0100] Among them, the metering parameters are used to control the metering setting of the metering module corresponding to the charging gun module to be corrected. Specifically, the metering parameters are generally pre-set when the metering module is calibrated at the factory. In actual use, the metering parameters can be adjusted according to the actual error situation to achieve dynamic calibration of the metering module.

[0101] Optionally, the metrology calibration method includes a calibration direction and a calibration amplitude. Accordingly, the metrology parameters of the charging gun module to be corrected are adjusted based on the metrology calibration method, including: adjusting the calibration amplitude of the metrology parameters of the charging gun module to be corrected according to the calibration direction.

[0102] In the above implementation, the charging gun module to be corrected can be determined when a metering self-test fault is determined, and the metering parameters of the charging gun module to be corrected can be adjusted in combination with a metering calibration method determined based on the metering error. This can achieve automatic recovery of the metering fault, which can help improve the degree of automation of charging pile operation and maintenance.

[0103] For further information, please refer to Figure 3 Step 303, after adjusting the metrological parameters of the charging gun module to be corrected based on the metrological calibration method, further includes the following steps: Step 304, generate a self-check start instruction, start recording the check duration, and execute steps 101 to 103.

[0104] Step 305 , when the verification time reaches a preset verification time threshold, an end self-check instruction is generated, and steps 104 and 105 are executed.

[0105] Step 306: When the metrology parameter does not exceed the corresponding metrology error range, determine that the metrology calibration is successful.

[0106] Optionally, when the metrology parameter exceeds the corresponding metrology error range, step 106 may be executed, or the metrology calibration abnormality may be determined and corresponding abnormal prompt information may be output to prompt manual calibration of the metrology parameter.

[0107] In the above implementation, after adjusting the metering parameters of the charging gun to be corrected, a start self-test instruction and an end self-test instruction can be automatically generated to confirm the verification result, and if the metering parameters do not exceed the corresponding metering error range, it is determined that the metering calibration is successful, thereby ensuring the effectiveness of the automatic metering calibration.

[0108] This application also provides a V2G dual-gun charging pile, refer to Figure 4The charging pile includes a first charging gun module 410, a second charging gun module 420, a dual-gun intercommunication relay 430 and a controller 440. The controller 440 is respectively connected to the first charging gun module 410, the second charging gun module 420 and the dual-gun intercommunication relay 430 by signal. The dual-gun intercommunication relay 430 is used to connect the first charging gun module 410 and the second charging gun module 420. The dual-gun intercommunication relay 430 is in a normally open state.

[0109] The controller 440 is used to execute any one of the V2G dual-gun charging pile metering self-check control methods provided in the above method embodiments.

[0110] In some embodiments, reference Figure 5 The first charging gun module 410 includes a first transmission submodule 411 , and the second charging gun module 420 includes a second transmission submodule 421 . The first transmission submodule 411 and the second transmission submodule 421 are connected via a double-gun interactive relay 430 .

[0111] In other embodiments, the first charging gun module 410 includes a first charging gun, and the second charging gun module 420 includes a second power transmission module and a self-test interface. The second power transmission module and the self-test interface are connected via a dual-gun interactive relay 430, and the self-test interface is matched with the first charging gun. During the metering self-test, the first charging gun is inserted into the self-test interface.

[0112] In actual implementation, the dual-gun interactive relay 430 may also be set in other ways, and this embodiment does not limit the setting method of the dual-gun interactive relay.

[0113] The present application also provides an electronic device. Figure 6 As shown, Figure 6 The electronic device 500 shown includes: a processor 501 and a memory 503. The processor 501 and the memory 503 are connected, such as through a bus 502. Optionally, the electronic device 500 may also include a transceiver 504. It should be noted that in actual applications, the transceiver 504 is not limited to one, and the structure of the electronic device 500 does not constitute a limitation on the embodiments of the present application.

[0114] The processor 501 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor 501 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0115] The bus 502 may include a path to transmit information between the above components. The bus 502 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 502 may be divided into an address bus, a data bus, etc. For ease of representation, Figure 6 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0116] The memory 503 may be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0117] The memory 503 is used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 501. The processor 501 is used to execute the application code stored in the memory 503 to implement the contents shown in the above method embodiment.

[0118] The electronic devices include, but are not limited to, mobile terminals such as mobile phones, laptop computers, PDAs (personal digital assistants), PADs (tablet computers), etc., and fixed terminals such as digital TVs, desktop computers, etc. It can also be a server terminal, etc. Figure 6 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0119] It should be understood that although the steps in the flowchart of the accompanying drawings are shown in sequence according to the instructions of the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise clearly stated in this document, the execution of these steps is not strictly limited in order and can be performed in other orders.

[0120] The above are only some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A control method for metering self-check of a V2G dual-gun charging pile, characterized in that: Used in a charging pile, the charging pile includes a first charging gun module, a second charging gun module and a double-gun intercommunication relay, the double-gun intercommunication relay is used to connect the first charging gun module and the second charging gun module, the double-gun intercommunication relay is in a normally open state, and the method includes: In response to the start self-test instruction, controlling the dual-gun intercommunication relay to close so that the first charging gun module and the second charging gun module are electrically connected; Control the first charging gun module to discharge at a preset voltage and a preset current, and obtain actual discharge data of the first charging gun module, where the actual discharge data is recorded by a metering module corresponding to the first charging gun module; Control the second charging gun module to charge internally with the preset current and the preset current pair, and obtain actual charging data of the second charging gun module, where the actual charging data is recorded by a metering module corresponding to the second charging gun module, and a type of the actual charging data corresponds to a type of the actual discharging data; In response to the end self-test instruction, controlling the dual-gun intercommunication relay to be disconnected, so that the electrical connection between the first charging gun module and the second charging gun module is disconnected; calculating a measurement error between the actual discharge data and the actual charge data; In the case where the metering error exceeds the corresponding metering error range, a metering self-test fault is determined.

2. The method according to claim 1, characterized in that The actual discharge data includes an actual discharge amount, the actual charge data includes an actual charge amount, and the measurement error includes a difference in charge value between the actual discharge amount and the actual charge amount; When the metering parameter exceeds the corresponding metering error threshold, determining a metering self-test fault includes: Determining whether the power difference exceeds a power error range; When the electric quantity difference exceeds the electric quantity error range, a metering self-test fault is determined.

3. The method according to claim 2, characterized in that The actual discharge data includes actual discharge power, the actual charging data includes actual charging power, the measurement error includes a power difference between the actual discharge power and the actual charging power, and after determining whether the current charging value exceeds the current error range, the method further includes: If the power difference does not exceed the power error range, determining whether the power difference exceeds the power error range; When the power difference exceeds the power error range, a metering self-test fault is determined.

4. The method according to claim 3, characterized in that The actual discharge data includes an actual discharge current and an actual discharge voltage, the actual charge data includes an actual charge current and an actual charge voltage, and the measurement error includes a current difference between the actual discharge current and the actual charge current and a voltage difference between the discharge charge voltage and the actual charge current; After determining whether the power difference exceeds the power error range, the method further includes: In a case where the power difference does not exceed the power error range, determining whether the current difference exceeds the current error range and whether the voltage difference exceeds the voltage error range; In the case where the current difference exceeds the current error range and / or the voltage difference exceeds the voltage error range, a metering self-test fault is determined.

5. The method according to claim 1, characterized in that After the metering self-check fault is determined, the method further includes: Determine a charging gun module to be corrected between the first charging gun module and the second charging gun module; Determining a metrology calibration method of the charging gun module to be corrected in combination with the metrology error; The metrology parameters of the charging gun module to be corrected are adjusted based on the metrology calibration method.

6. The method according to claim 5, characterized in that After adjusting the metrology parameters of the charging gun to be corrected based on the metrology calibration method, the method further includes: Generate the self-check start instruction and start recording the check duration; When the verification time reaches a preset verification time threshold, generating the end self-check instruction; When the metrology parameter does not exceed the corresponding metrology error range, it is determined that the metrology calibration is successful.

7. The method according to claim 5, characterized in that The first energy storage device corresponding to the first charging gun module and the second energy storage device corresponding to the second charging gun module are separately provided, and after responding to the self-test instruction, the method further includes: disconnecting the charging pile from the mains, and recording the power of the first energy storage device before the self-test and the power of the second energy storage device before the self-test; After responding to the end self-test instruction, the method further includes: recording the current of the first energy storage device after the test and the power of the second energy storage device after the self-test; The actual discharge data includes an actual discharge amount, the actual charge data includes an actual charge amount, and the determining of a charging gun to be corrected between the first charging gun module and the second charging gun module includes: Determine a power reduction amount of the first energy storage device based on the power before self-test and the power after self-test of the first energy storage device, and determine whether the first charging gun module is the charging gun module to be corrected based on the power reduction amount and the actual discharge amount; The power increase of the first energy storage device is determined based on the power before self-test and the power after self-test of the second energy storage device, and whether the second charging gun module is the charging gun module to be corrected is determined based on the power increase and the actual discharge amount.

8. A V2G dual-gun charging pile, characterized in that: The charging pile includes a first charging gun module, a second charging gun module, a dual-gun intercommunication relay and a controller, wherein the controller is respectively connected to the first charging gun module, the second charging gun module and the dual-gun intercommunication relay by signal, the dual-gun intercommunication relay is used to connect the first charging gun module and the second charging gun module, and the dual-gun intercommunication relay is in a normally open state; The controller is used to execute the control method for V2G dual-gun charging pile metering self-checking according to any one of claims 1-7.

9. The V2G dual-gun charging pile according to claim 8, characterized in that: The first charging gun module includes a first sub-transmission module, the second charging gun module includes a second sub-transmission module, and the first sub-transmission module and the second sub-transmission module are connected through the dual-gun interactive relay.

10. An electronic device, characterized in that: The electronic device comprises: at least one processor; Memory; At least one application, wherein at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute the control method for metering self-check of a V2G dual-gun charging pile as described in any one of claims 1 to 7.

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