A method and system for measuring discharge power of a mobile charging vehicle

Abstract

The present invention relates to the technical field of electric quantity measurement, and specifically discloses a method and system for measuring the discharge electric quantity of a mobile charging vehicle, the method comprising: detecting a real-time discharge current and a real-time discharge voltage of a current discharge process of the mobile charging vehicle; obtaining a plurality of reference discharge records of the current discharge process, wherein the reference discharge record contains a real-time discharge current and a real-time discharge voltage obtained by detecting the entire discharge process; determining the discharged electric quantity of the mobile charging vehicle in the current discharge process based on the obtained real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records; and realizing accurate determination of the discharge electric quantity of the mobile charging vehicle based on the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle and a plurality of reference discharge records of the current discharge process without installing an additional electric quantity meter or wireless sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of electric quantity measurement, and in particular to a discharge electric quantity measurement method and system for a mobile charging vehicle. Background Art

[0002] A mobile charging vehicle is a device that receives a user's charging order in the background and goes to a designated location to charge an electric vehicle. Since the background dispatch of the mobile charging vehicle needs to be decided based on the real-time remaining power of the mobile charging vehicle, real-time detection of the discharge power of the mobile charging vehicle is critical to the background dispatch decision of the mobile charging vehicle. At present, the detection of the discharge power of the discharge battery usually requires the combination of the status information of the discharge device and the real-time monitoring data during the discharge process. The following are several conventional detection methods:

[0003] 1. Voltage and current measurement: By continuously monitoring the voltage and current at the port of the discharge device, the amount of electricity in the discharge process can be estimated. This method is simple and easy to implement, but it may be affected by external factors, such as changes in the load of the charging facility, line impedance, etc.

[0004] 2. Battery state estimation: Battery state estimation (BSEE) technology is used to estimate the state of the battery through the electrochemical reaction characteristics inside the battery. This method requires installing a fuel gauge on the discharge device and regularly collecting power information. This method is more complicated, but it can obtain more accurate power data.

[0005] 3. Wireless charging sensor: By placing wireless sensors around the discharge device, the remaining battery power can be estimated through the change in signal strength received by the sensor. This method does not require contact with the battery, but it is necessary to ensure that the battery is in good condition, otherwise it may cause large errors.

[0006] 4. Data analysis: By comparing the existing charging records with the usage and discharge status of the discharge device, possible discharge signs can be found. For example, if the charging frequency increases significantly, the battery may be over-discharged.

[0007] However, none of the above methods can achieve accurate detection of the discharge power of the discharge battery of the mobile charging vehicle by only continuously monitoring the voltage and current at the port of the discharge device without installing an additional power meter or wireless sensor.

[0008] Therefore, the present invention proposes a method and system for measuring the discharge power of a mobile charging vehicle. Summary of the invention

[0009] The present invention provides a method and system for measuring the discharge power of a mobile charging vehicle, which is used to accurately determine the discharge power of the mobile charging vehicle based on the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle and multiple reference discharge records of the current discharge process without the need to additionally install a power meter or wireless sensor.

[0010] The present invention provides a method for measuring the discharge quantity of a mobile charging vehicle, comprising:

[0011] S1: Detect the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle;

[0012] S2: Acquire multiple reference discharge records of the current discharge process, wherein the reference discharge records contain the real-time discharge current and the real-time discharge voltage obtained by the whole detection of the corresponding discharge process;

[0013] S3: Based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records, the discharged amount of the mobile charging vehicle in the current discharge process is determined.

[0014] Preferably, the method for measuring the discharge quantity of a mobile charging vehicle, S2: obtaining multiple reference discharge records of the current discharge process, including:

[0015] S201: Determine the battery model of the rechargeable battery in each actual discharge record in the actual discharge record library of the mobile charging vehicle;

[0016] S202: Filtering out all actual discharge records whose corresponding rechargeable batteries have the same battery model as the rechargeable battery corresponding to the current discharge process from the actual discharge record library of the mobile charging vehicle as all first reference discharge records of the current discharge process;

[0017] S203: Obtain all reference discharge records of the current discharge process based on all first reference discharge records of the current discharge process.

[0018] Preferably, the method for measuring the discharge quantity of a mobile charging vehicle, S203: obtaining all reference discharge records of the current discharge process based on all first reference discharge records of the current discharge process, including:

[0019] Determine whether the total number of all first reference discharge records is not less than a preset threshold value. If so, treat all first reference discharge records as all reference discharge records of the current discharge process. Otherwise, select all second reference discharge records of the current discharge process from an actual discharge record library of a mobile charging vehicle whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle.

[0020] All first reference discharge records and all second reference discharge records of the current discharge process are regarded as all reference discharge records of the current discharge process.

[0021] Preferably, the method for measuring the discharge power of a mobile charging vehicle is based on screening out all second reference discharge records of the current discharge process from an actual discharge record library of a mobile charging vehicle whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle, including:

[0022] All mobile charging vehicles whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle are regarded as all reference mobile charging vehicles of the current mobile charging vehicle;

[0023] Screening out all actual discharge records whose corresponding rechargeable batteries have the same battery model as the rechargeable battery corresponding to the current discharge process from the actual discharge record library of all reference mobile charging vehicles as all third reference discharge records of the current discharge process;

[0024] Taking the difference between the preset threshold and the total number of all first reference discharge records as the rated total number of all second reference discharge records;

[0025] Based on the rated total of all the second reference discharge records and all the third reference discharge records of the current discharge process, all the second reference discharge records of the current discharge process are determined.

[0026] Preferably, the method for measuring the discharge quantity of a mobile charging vehicle determines all second reference discharge records of the current discharge process based on the rated total of all second reference discharge records and all third reference discharge records of the current discharge process, including:

[0027] Determine whether the total number of all third reference discharge records of the current discharge process is less than the rated total number of all second reference discharge records, and if so, regard all third reference discharge records of the current discharge process as all second reference discharge records of the current discharge process;

[0028] Otherwise, among all the third reference discharge records of the current discharge process, a plurality of third reference discharge records whose total number is equal to the rated total number of all the second reference discharge records are screened out as all the second reference discharge records of the current discharge process.

[0029] Preferably, the method for measuring the discharge quantity of a mobile charging vehicle, in which a total number of third reference discharge records equal to the rated total number of all second reference discharge records are screened out from all third reference discharge records of the current discharge process as all second reference discharge records of the current discharge process, includes:

[0030] Based on the real-time discharge current and real-time discharge voltage obtained by full detection of the corresponding discharge process contained in each third reference discharge record of the current discharge process, respectively fitting the discharge voltage curve and discharge current curve of each third reference discharge record;

[0031] calculating the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records;

[0032] Based on all third reference discharge records in the current discharge process, all record sets are determined, wherein each record set contains a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records;

[0033] Based on the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records, a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process.

[0034] Preferably, the method for measuring the discharge quantity of a mobile charging vehicle, based on the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records, screens out a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records from all record sets as all second reference discharge records of the current discharge process, including:

[0035] Based on the similarity between the discharge voltage curves of every two third reference discharge records in each record set, a discharge voltage curve similarity matrix of each record set is constructed; at the same time, based on the similarity between the discharge current curves of every two third reference discharge records in each record set, a discharge current curve similarity matrix of each record set is constructed;

[0036] Orthogonal normalization is performed on the discharge voltage curve similarity matrix and the discharge current curve similarity matrix of each record set to obtain a first similarity transformation matrix and a second similarity transformation matrix of each record set;

[0037] The mean value of the values ​​of each third reference discharge record in each record set in all column vectors in the corresponding first similarity transformation matrix is ​​used as the first comprehensive transformation value of each third reference discharge record in each record set, and at the same time, the mean value of the values ​​of each third reference discharge record in each record set in all column vectors in the corresponding second similarity transformation matrix is ​​used as the second comprehensive transformation value of each third reference discharge record in each record set;

[0038] Convert the first integrated transformation values ​​and the second integrated transformation values ​​of all the third reference discharge records in each record set into two-dimensional coordinates to obtain a two-dimensional point distribution map of each record set;

[0039] Based on the two-dimensional point distribution diagram of all record sets, a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process.

[0040] Preferably, the method for measuring the discharge power of a mobile charging vehicle is based on the two-dimensional point distribution diagram of all record sets, and multiple third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process, including:

[0041] The point spacing between each two coordinate points in the two-dimensional point distribution map of each record set is calculated, and the mean value of all point spacings in the two-dimensional point distribution map of each record set is regarded as the discharge trend dispersion of each record set;

[0042] Among all the record sets, all the third reference discharge records contained in the record set with the minimum discharge trend dispersion are regarded as all the second reference discharge records of the current discharge process.

[0043] Preferably, the method for measuring the discharge power of a mobile charging vehicle, S3: based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records, determining the discharged power of the mobile charging vehicle in the current discharge process, including:

[0044] S301: fitting a discharged voltage curve and a discharged current curve of the current discharge process based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process;

[0045] S302: inputting the discharge voltage curve and the discharge current curve of all reference discharge records and the discharged voltage curve and the discharged current curve of the current discharge process into a discharge curve correction model to obtain the discharged voltage correction curve and the discharged current correction curve of the current discharge process;

[0046] S303: Determine the discharged amount of the mobile charging vehicle in the current discharging process based on the discharged voltage correction curve and the discharged current correction curve in the current discharging process.

[0047] The present invention provides a discharge power measurement system for a mobile charging vehicle, which is used to execute the discharge power measurement method for a mobile charging vehicle described in any one of embodiments 1 to 9, including:

[0048] A discharge parameter detection module is used to detect the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle;

[0049] A reference record acquisition module, used to acquire multiple reference discharge records of the current discharge process, wherein the reference discharge record includes a real-time discharge current and a real-time discharge voltage obtained by detecting the entire discharge process;

[0050] The discharge power determination module is used to determine the discharged power of the mobile charging vehicle in the current discharge process based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records.

[0051] The beneficial effects of the present invention compared to the prior art are as follows: based on the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle and multiple reference discharge records of the current discharge process, the discharge power of the mobile charging vehicle can be accurately determined without the need to additionally install a power meter or wireless sensor.

[0052] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0053] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0055] Figure 1 This is a flow chart of a method for measuring the discharge power of a mobile charging vehicle in an embodiment of the present invention;

[0056] Figure 2 is a flowchart of a specific execution method of step S2 in an embodiment of the present invention;

[0057] Figure 3 is a flowchart of a specific execution method of step S3 in an embodiment of the present invention;

[0058] Figure 4 Schematic diagram of internal functional modules of a discharge power measurement system for a mobile charging vehicle in an embodiment of the present invention. DETAILED DESCRIPTION

[0059] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0060] Embodiment 1:

[0061] The present invention provides a method for measuring the discharge power of a mobile charging vehicle, referring to Figure 1 ,include:

[0062] S1: Detect the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle;

[0063] S2: Acquire multiple reference discharge records of the current discharge process, wherein the reference discharge records contain the real-time discharge current and the real-time discharge voltage obtained by the whole detection of the corresponding discharge process;

[0064] S3: Based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records, the discharged amount of the mobile charging vehicle in the current discharge process is determined.

[0065] In this embodiment, the mobile charging vehicle is a device that receives a charging order from a user in the background and goes to a designated location to charge the electric vehicle.

[0066] In this embodiment, the real-time discharge current is the real-time current of the output port of the discharge battery used by the mobile charging vehicle to discharge the charged electric vehicle.

[0067] In this embodiment, the real-time discharge voltage is the real-time voltage of the output port of the discharge battery of the mobile charging vehicle for discharging the charged electric vehicle.

[0068] In this embodiment, the unit of the discharged electricity is watt-hour.

[0069] The beneficial effects of the above technology are: based on the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle and multiple reference discharge records of the current discharge process, the discharge power of the mobile charging vehicle can be accurately determined without the need to install additional power meters or wireless sensors.

[0070] Embodiment 2:

[0071] Based on Example 1, the discharge power measurement method of the mobile charging vehicle, S2: obtaining multiple reference discharge records of the current discharge process, reference Figure 2 ,include:

[0072] S201: Determine the battery model of the rechargeable battery in each actual discharge record in the actual discharge record library of the mobile charging vehicle;

[0073] S202: Filtering out all actual discharge records whose corresponding rechargeable batteries have the same battery model as the rechargeable battery corresponding to the current discharge process from the actual discharge record library of the mobile charging vehicle as all first reference discharge records of the current discharge process;

[0074] S203: Obtain all reference discharge records of the current discharge process based on all first reference discharge records of the current discharge process.

[0075] In this embodiment, the actual discharge record library is a database that stores all actual discharge records currently completed by a single mobile charging vehicle.

[0076] In this embodiment, the actual discharge record includes the real-time discharge current and the real-time discharge voltage obtained by the full detection of the corresponding completed discharge process of the mobile charging vehicle.

[0077] In this embodiment, the rechargeable battery in the actual discharge record is the battery charged in the corresponding discharge process, that is, the battery on the charged electric vehicle.

[0078] The beneficial effect of the above technology is: the variables between all the reference discharge records of the current discharge process screened out and the current discharge process are controlled, so that the accuracy of the discharged power of the mobile charging vehicle in the current discharge process subsequently determined based on all the reference discharge records is higher.

[0079] Embodiment 3:

[0080] Based on Example 2, the method for measuring the discharge power of a mobile charging vehicle, S203: obtaining all reference discharge records of the current discharge process based on all first reference discharge records of the current discharge process, including:

[0081] Determine whether the total number of all first reference discharge records is not less than a preset threshold value. If so, treat all first reference discharge records as all reference discharge records of the current discharge process. Otherwise, select all second reference discharge records of the current discharge process from an actual discharge record library of a mobile charging vehicle whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle.

[0082] All first reference discharge records and all second reference discharge records of the current discharge process are regarded as all reference discharge records of the current discharge process.

[0083] In this embodiment, the preset threshold is the maximum number of all reference discharge records of the preset current discharge process.

[0084] The beneficial effect of the above technology is: by statistically comparing the total number of all first reference discharge records, it is determined whether it is necessary to screen out another part of the reference discharge records of the current discharge process from the actual discharge record library of the mobile charging vehicle whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle, thereby limiting the total number of all reference discharge records of the current discharge process finally obtained, and reducing the amount of calculation in the subsequent mobile charging vehicle in the process of calculating the discharged electricity in the current discharge process.

[0085] Embodiment 4:

[0086] On the basis of Example 3, the method for measuring the discharge power of the mobile charging vehicle is based on screening out all second reference discharge records of the current discharge process from an actual discharge record library of a mobile charging vehicle whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle, including:

[0087] All mobile charging vehicles whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle are regarded as all reference mobile charging vehicles of the current mobile charging vehicle;

[0088] Screening out all actual discharge records whose corresponding rechargeable batteries have the same battery model as the rechargeable battery corresponding to the current discharge process from the actual discharge record library of all reference mobile charging vehicles as all third reference discharge records of the current discharge process;

[0089] Taking the difference between the preset threshold and the total number of all first reference discharge records as the rated total number of all second reference discharge records;

[0090] Based on the rated total of all the second reference discharge records and all the third reference discharge records of the current discharge process, all the second reference discharge records of the current discharge process are determined.

[0091] The beneficial effect of the above technology is: by screening out all actual discharge records whose corresponding charging battery model is the same as the battery model of the charging battery corresponding to the current discharge process from the actual discharge record library of all reference mobile charging vehicles whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle, as all third reference discharge records of the current discharge process, another part of the reference discharge records of the current discharge process is determined.

[0092] Embodiment 5:

[0093] On the basis of Example 4, the discharge power measurement method of the mobile charging vehicle determines all the second reference discharge records of the current discharge process based on the rated total of all the second reference discharge records and all the third reference discharge records of the current discharge process, including:

[0094] Determine whether the total number of all third reference discharge records of the current discharge process is less than the rated total number of all second reference discharge records, and if so, regard all third reference discharge records of the current discharge process as all second reference discharge records of the current discharge process;

[0095] Otherwise, among all the third reference discharge records of the current discharge process, a plurality of third reference discharge records whose total number is equal to the rated total number of all the second reference discharge records are screened out as all the second reference discharge records of the current discharge process.

[0096] The beneficial effect of the above technology is that by comparing the total number of all third reference discharge records of the current discharge process with the rated total number of all second reference discharge records, the total number of all reference discharge records of the current discharge process finally obtained is limited, and the amount of calculation of the subsequent mobile charging vehicle in the calculation process of the discharged electricity in the current discharge process is reduced.

[0097] Embodiment 6:

[0098] On the basis of Example 5, the method for measuring the discharge power of a mobile charging vehicle, in all third reference discharge records of the current discharge process, screens out a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records as all second reference discharge records of the current discharge process, including:

[0099] Based on the real-time discharge current and real-time discharge voltage obtained by full detection of the corresponding discharge process contained in each third reference discharge record of the current discharge process, respectively fitting the discharge voltage curve and discharge current curve of each third reference discharge record;

[0100] calculating the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records;

[0101] Based on all third reference discharge records in the current discharge process, all record sets are determined, wherein each record set contains a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records;

[0102] Based on the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records, a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process.

[0103] In this embodiment, the discharge voltage curve is formed by fitting the real-time discharge voltage values ​​obtained by detecting the entire discharge process corresponding to each third reference discharge record in a time series.

[0104] In this embodiment, the discharge current curve is formed by fitting the real-time discharge current values ​​obtained by detecting the entire discharge process corresponding to each third reference discharge record in a time series.

[0105] In this embodiment, calculating the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records includes:

[0106] Generate a discharge voltage sequence (or discharge current sequence) of the discharge voltage curve (or discharge current curve) of each third reference discharge record based on the ordinal number of the acquisition order of each discharge voltage value (or discharge current value) in the discharge voltage curve (or discharge current curve) of each third reference discharge record;

[0107] The sum of the products of all two discharge voltage values ​​(or discharge current values) of the same sequence number in the discharge voltage curves (or discharge current curves) of every two third reference discharge records is divided by the sum of the squares of all discharge voltage values ​​(or discharge current values) in one of the corresponding discharge voltage sequences (or discharge current sequences) to obtain the similarity between the discharge voltage curves (or discharge current curves) of the corresponding two third reference discharge records.

[0108] In this embodiment, all record sets contain all possible situations of the record sets that can be determined from all third reference discharge records of the current discharge process.

[0109] The beneficial effects of the above technology are: by fitting the real-time discharge current and the real-time discharge voltage obtained by the full detection of the corresponding discharge process contained in each third reference discharge record of the current discharge process into a curve, and calculating the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records, and at the same time arbitrarily combining all the third reference discharge records of the current discharge process into multiple record sets, it is convenient to screen out multiple third reference discharge records whose total number is the rated total number of all second reference discharge records from all record sets as all second reference discharge records of the current discharge process.

[0110] Embodiment 7:

[0111] On the basis of Example 6, the method for measuring the discharge power of a mobile charging vehicle, based on the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records, screens out a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records from all record sets as all second reference discharge records of the current discharge process, including:

[0112] Based on the similarity between the discharge voltage curves of every two third reference discharge records in each record set, a discharge voltage curve similarity matrix of each record set is constructed; at the same time, based on the similarity between the discharge current curves of every two third reference discharge records in each record set, a discharge current curve similarity matrix of each record set is constructed;

[0113] Orthogonal normalization is performed on the discharge voltage curve similarity matrix and the discharge current curve similarity matrix of each record set to obtain a first similarity transformation matrix and a second similarity transformation matrix of each record set;

[0114] The mean value of the values ​​of each third reference discharge record in each record set in all column vectors in the corresponding first similarity transformation matrix is ​​used as the first comprehensive transformation value of each third reference discharge record in each record set, and at the same time, the mean value of the values ​​of each third reference discharge record in each record set in all column vectors in the corresponding second similarity transformation matrix is ​​used as the second comprehensive transformation value of each third reference discharge record in each record set;

[0115] Convert the first integrated transformation values ​​and the second integrated transformation values ​​of all the third reference discharge records in each record set into two-dimensional coordinates to obtain a two-dimensional point distribution map of each record set;

[0116] Based on the two-dimensional point distribution diagram of all record sets, a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process.

[0117] In this embodiment, based on the similarity between the discharge voltage curves of every two third reference discharge records in each record set, a discharge voltage curve similarity matrix of each record set is constructed. At the same time, based on the similarity between the discharge current curves of every two third reference discharge records in each record set, a discharge current curve similarity matrix of each record set is constructed, including:

[0118] When the similarity between the discharge voltage curves (or discharge current curves) of the two third reference discharge records exceeds a preset similarity threshold (the value is relatively large), the standard similarity between the discharge voltage curves (or discharge current curves) of the corresponding two reference discharge records is set to 1, otherwise, it is set to 0;

[0119] Sorting all third reference discharge records to determine the order of each third reference discharge record;

[0120] The standard similarity between the discharge voltage curve (or discharge current curve) of the i-th reference discharge record and the discharge voltage curve (or discharge current curve) of the j-th reference discharge record is regarded as the value of the i-th row and j-th column and the value of the j-th row and i-th column in the discharge voltage curve similarity matrix of the corresponding record set, and the value of the i-th row and i-th column is set to 1;

[0121] Thus, the discharge voltage curve similarity matrix (discharge current curve similarity matrix) of each record set is obtained.

[0122] In this embodiment, the discharge voltage curve similarity matrix and the discharge current curve similarity matrix of each record set are orthogonally normalized to obtain the first similarity transformation matrix and the second similarity transformation matrix of each record set, which are:

[0123] Performing singular value decomposition on the discharge voltage curve similarity matrix and the discharge current curve similarity matrix of each record set to obtain an orthogonal matrix corresponding to the discharge voltage curve similarity matrix and an orthogonal matrix corresponding to the discharge current curve similarity matrix, and normalizing the orthogonal matrix corresponding to the discharge voltage curve similarity matrix and the orthogonal matrix corresponding to the discharge current curve similarity matrix to obtain a first similarity transformation matrix and a second similarity transformation matrix for each record set;

[0124] The first similarity transformation matrix is ​​obtained by normalizing the orthogonal matrix corresponding to the discharge voltage curve similarity matrix, and the second similarity transformation matrix is ​​obtained by normalizing the orthogonal matrix corresponding to the discharge current curve similarity matrix.

[0125] In this embodiment, the first comprehensive transformation values ​​and the second comprehensive transformation values ​​of all the third reference discharge records in each record set are converted into two-dimensional coordinates to obtain a two-dimensional point distribution diagram of each record set, namely:

[0126] The first integrated transformation value and the second integrated transformation value of each third reference discharge record in each record set are respectively regarded as the abscissa value and the ordinate value of the corresponding third reference discharge record of the corresponding record set, thereby determining the coordinate point corresponding to each third reference discharge record in each record set in the two-dimensional coordinate system;

[0127] The coordinate points corresponding to all the third reference discharge records in each record set in the two-dimensional coordinate system are marked in the two-dimensional coordinate system to obtain a two-dimensional point distribution diagram of each record set.

[0128] The beneficial effect of the above technology is: to quantify the overall feature similarity of all third reference discharge records in each record set, thereby ensuring the overall feature similarity and representativeness of all second reference discharge records of the current discharge process subsequently screened out.

[0129] Embodiment 8:

[0130] On the basis of Example 7, the discharge power measurement method of the mobile charging vehicle, based on the two-dimensional point distribution diagram of all record sets, screens out a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records from all record sets as all second reference discharge records of the current discharge process, including:

[0131] The point spacing between each two coordinate points in the two-dimensional point distribution map of each record set is calculated, and the mean value of all point spacings in the two-dimensional point distribution map of each record set is regarded as the discharge trend dispersion of each record set;

[0132] Among all the record sets, all the third reference discharge records contained in the record set with the minimum discharge trend dispersion are regarded as all the second reference discharge records of the current discharge process.

[0133] In this embodiment, the discharge trend dispersion of the record set represents the comprehensive situation of the discrete degree of the characteristics of the discharge voltage curve (here mainly considering the value and trend of the curve) and the discrete degree of the characteristics of the discharge current curve (here mainly considering the value and trend of the curve) of all reference discharge records contained in the record set.

[0134] The beneficial effect of the above technology is: by calculating the discharge trend discreteness of each record set, and taking all the third reference discharge records contained in the record set with the minimum discharge trend discreteness as all the second reference discharge records of the current discharge process, the overall feature similarity and representativeness of all the second reference discharge records of the current discharge process screened out are further guaranteed.

[0135] Embodiment 9:

[0136] Based on Example 1, the method for measuring the discharge power of a mobile charging vehicle, S3: based on the real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records obtained, determine the discharged power of the mobile charging vehicle in the current discharge process, reference Figure 3 ,include:

[0137] S301: fitting a discharged voltage curve and a discharged current curve of the current discharge process based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process;

[0138] S302: inputting the discharge voltage curve and the discharge current curve of all reference discharge records and the discharged voltage curve and the discharged current curve of the current discharge process into a discharge curve correction model to obtain the discharged voltage correction curve and the discharged current correction curve of the current discharge process;

[0139] S303: Determine the discharged amount of the mobile charging vehicle in the current discharging process based on the discharged voltage correction curve and the discharged current correction curve in the current discharging process.

[0140] In this embodiment, based on the real-time discharge current and real-time discharge voltage of the current discharge process that have been acquired, the discharged voltage curve and the discharged current curve of the current discharge process are fitted, that is:

[0141] Based on the acquisition timing of the real-time discharge current (or real-time discharge voltage) of the current discharge process, the real-time discharge current (or real-time discharge voltage) of the current discharge process is fitted according to the timing to obtain the discharged voltage curve (or discharged current curve) of the current discharge process.

[0142] In this embodiment, the discharge curve correction model is a model obtained by performing machine learning on a large number of positive samples including multiple discharge current curves with highly similar trends and numerical features and multiple discharge voltage curves with highly similar trends and numerical features, a large number of negative samples including multiple discharge current curves with highly similar trends and numerical features and marked discharge current curves with trends and numerical features that are significantly different from the former, and multiple discharge voltage curves with highly similar trends and numerical features and marked discharge voltage curves with trends and numerical features that are significantly different from the former.

[0143] The discharge curve correction model can correct the discharged voltage curve and the discharged current curve of the input current discharge process into a discharged voltage correction curve that is highly similar to the trend and numerical characteristics of the discharge voltage curve of all the input reference discharge records and a discharged current correction curve that is highly similar to the trend and numerical characteristics of the discharge current curve of all the input reference discharge records based on the discharge voltage curve and the discharge current curve of all the input reference discharge records.

[0144] In this embodiment, the discharged voltage correction curve and the discharged current correction curve of the current discharge process are the discharged voltage curve and the discharged current curve of the current discharge process corrected by the discharge curve correction model.

[0145] In this embodiment, based on the discharged voltage correction curve and the discharged current correction curve of the current discharge process, the discharged amount of the mobile charging vehicle in the current discharge process is determined, that is:

[0146] Based on the discharged voltage correction curve of the current discharge process, a function u(t) representing the discharge voltage change over time of the current discharge process is determined. At the same time, based on the discharged current correction curve of the current discharge process, a function i(t) representing the discharge current change over time of the current discharge process is determined.

[0147] Determine the discharge time t of the current discharge process;

[0148] The integral value of the product of function u(t) and function i(t) in [0, t] is regarded as the discharged power of the mobile charging vehicle in the current discharging process.

[0149] The beneficial effects of the above technology are: based on the artificial intelligence algorithm and the discharge voltage curve and discharge current curve of all reference discharge records, the discharged voltage curve and the discharged current curve of the current discharge process are corrected, and based on the discharged voltage correction curve and the discharged current correction curve of the current discharge process, the discharged amount of the mobile charging vehicle in the current discharge process is accurately calculated.

[0150] Embodiment 10:

[0151] The present invention provides a discharge power measurement system for a mobile charging vehicle, which is used to perform the discharge power measurement method for a mobile charging vehicle described in any one of embodiments 1 to 9, referring to Figure 4 ,include:

[0152] A discharge parameter detection module is used to detect the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle;

[0153] A reference record acquisition module, used to acquire multiple reference discharge records of the current discharge process, wherein the reference discharge record includes a real-time discharge current and a real-time discharge voltage obtained by detecting the entire discharge process;

[0154] The discharge power determination module is used to determine the discharged power of the mobile charging vehicle in the current discharge process based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records.

[0155] The beneficial effects of the above technology are: based on the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle and multiple reference discharge records of the current discharge process, the discharge power of the mobile charging vehicle can be accurately determined without the need to install an additional power meter or wireless sensor.

[0156] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for measuring the discharge power of a mobile charging vehicle, characterized in that: include: S1: Detect the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle; S2: Acquire multiple reference discharge records of the current discharge process, wherein the reference discharge records contain the real-time discharge current and the real-time discharge voltage obtained by the whole detection of the corresponding discharge process; S3: Based on the real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records, the discharged amount of the mobile charging vehicle in the current discharge process is determined, including: S301: fitting a discharged voltage curve and a discharged current curve of the current discharge process based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process; S302: inputting the discharge voltage curve and the discharge current curve of all reference discharge records and the discharged voltage curve and the discharged current curve of the current discharge process into a discharge curve correction model to obtain the discharged voltage correction curve and the discharged current correction curve of the current discharge process; S303: Determine the discharged amount of the mobile charging vehicle in the current discharging process based on the discharged voltage correction curve and the discharged current correction curve in the current discharging process.

2. The method for measuring the discharge quantity of a mobile charging vehicle according to claim 1, characterized in that: S2: Obtain multiple reference discharge records of the current discharge process, including: S201: Determine the battery model of the rechargeable battery in each actual discharge record in the actual discharge record library of the mobile charging vehicle; S202: Filtering out all actual discharge records whose corresponding rechargeable batteries have the same battery model as the rechargeable battery corresponding to the current discharge process from the actual discharge record library of the mobile charging vehicle as all first reference discharge records of the current discharge process; S203: Obtain all reference discharge records of the current discharge process based on all first reference discharge records of the current discharge process.

3. The method for measuring the discharge quantity of a mobile charging vehicle according to claim 2, characterized in that: S203: Obtaining all reference discharge records of the current discharge process based on all first reference discharge records of the current discharge process, including: Determine whether the total number of all first reference discharge records is not less than a preset threshold value. If so, treat all first reference discharge records as all reference discharge records of the current discharge process. Otherwise, select all second reference discharge records of the current discharge process from an actual discharge record library of a mobile charging vehicle whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle. All first reference discharge records and all second reference discharge records of the current discharge process are regarded as all reference discharge records of the current discharge process.

4. The method for measuring the discharge quantity of a mobile charging vehicle according to claim 3, characterized in that: Based on the actual discharge record library of the mobile charging vehicle whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle, all second reference discharge records of the current discharge process are screened out, including: All mobile charging vehicles whose corresponding discharge battery model is the same as the discharge battery model of the current mobile charging vehicle are regarded as all reference mobile charging vehicles of the current mobile charging vehicle; Screening out all actual discharge records whose corresponding rechargeable batteries have the same battery model as the rechargeable battery corresponding to the current discharge process from the actual discharge record library of all reference mobile charging vehicles as all third reference discharge records of the current discharge process; Taking the difference between the preset threshold and the total number of all first reference discharge records as the rated total number of all second reference discharge records; Based on the rated total of all the second reference discharge records and all the third reference discharge records of the current discharge process, all the second reference discharge records of the current discharge process are determined.

5. The method for measuring the discharge quantity of a mobile charging vehicle according to claim 4, characterized in that: Based on the rated total of all second reference discharge records and all third reference discharge records of the current discharge process, all second reference discharge records of the current discharge process are determined, including: Determine whether the total number of all third reference discharge records of the current discharge process is less than the rated total number of all second reference discharge records, and if so, regard all third reference discharge records of the current discharge process as all second reference discharge records of the current discharge process; Otherwise, among all the third reference discharge records of the current discharge process, a plurality of third reference discharge records whose total number is equal to the rated total number of all the second reference discharge records are screened out as all the second reference discharge records of the current discharge process.

6. The method for measuring the discharge quantity of a mobile charging vehicle according to claim 5, characterized in that: Among all the third reference discharge records of the current discharge process, a plurality of third reference discharge records whose total number is the rated total number of all the second reference discharge records are screened out as all the second reference discharge records of the current discharge process, including: Based on the real-time discharge current and real-time discharge voltage obtained by full detection of the corresponding discharge process contained in each third reference discharge record of the current discharge process, respectively fitting the discharge voltage curve and discharge current curve of each third reference discharge record; calculating the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records; Based on all third reference discharge records in the current discharge process, all record sets are determined, wherein each record set contains a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records; Based on the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records, a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process.

7. The method for measuring the discharge quantity of a mobile charging vehicle according to claim 6, characterized in that: Based on the similarity between the discharge voltage curves and the similarity between the discharge current curves of every two third reference discharge records, a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process, including: Based on the similarity between the discharge voltage curves of every two third reference discharge records in each record set, a discharge voltage curve similarity matrix of each record set is constructed; at the same time, based on the similarity between the discharge current curves of every two third reference discharge records in each record set, a discharge current curve similarity matrix of each record set is constructed; Orthogonal normalization is performed on the discharge voltage curve similarity matrix and the discharge current curve similarity matrix of each record set to obtain a first similarity transformation matrix and a second similarity transformation matrix of each record set; The mean value of the values ​​of each third reference discharge record in each record set in all column vectors in the corresponding first similarity transformation matrix is ​​used as the first comprehensive transformation value of each third reference discharge record in each record set, and at the same time, the mean value of the values ​​of each third reference discharge record in each record set in all column vectors in the corresponding second similarity transformation matrix is ​​used as the second comprehensive transformation value of each third reference discharge record in each record set; Convert the first integrated transformation values ​​and the second integrated transformation values ​​of all the third reference discharge records in each record set into two-dimensional coordinates to obtain a two-dimensional point distribution map of each record set; Based on the two-dimensional point distribution diagram of all record sets, a plurality of third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process.

8. The method for measuring the discharge quantity of a mobile charging vehicle according to claim 7, characterized in that: Based on the two-dimensional point distribution diagram of all record sets, multiple third reference discharge records whose total number is the rated total number of all second reference discharge records are screened out from all record sets as all second reference discharge records of the current discharge process, including: The point spacing between each two coordinate points in the two-dimensional point distribution map of each record set is calculated, and the mean value of all point spacings in the two-dimensional point distribution map of each record set is regarded as the discharge trend dispersion of each record set; Among all the record sets, all the third reference discharge records contained in the record set with the minimum discharge trend dispersion are regarded as all the second reference discharge records of the current discharge process.

9. A discharge power measurement system for a mobile charging vehicle, characterized in that: The method for measuring the discharge power of a mobile charging vehicle according to any one of claims 1 to 8 comprises: A discharge parameter detection module is used to detect the real-time discharge current and real-time discharge voltage of the current discharge process of the mobile charging vehicle; A reference record acquisition module, used to acquire multiple reference discharge records of the current discharge process, wherein the reference discharge record includes a real-time discharge current and a real-time discharge voltage obtained by detecting the entire discharge process; The discharge power determination module is used to determine the discharged power of the mobile charging vehicle in the current discharge process based on the acquired real-time discharge current and real-time discharge voltage of the current discharge process and all reference discharge records.

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