A charging pile charging method and system based on power analysis

Abstract

The present invention discloses a charging method and system for charging piles based on power analysis, which relates to the technical field of fee metering, including obtaining the charging amount, the initial power of the charging pile, and the unit price corresponding to the charging power; obtaining the predicted charging time. The present invention determines the predicted charging time by analyzing the charging amount and the initial power of the charging pile, and evenly divides the predicted charging time into several groups of deduction windows. When the real-time charging time is consistent with the time length of the deduction window, the maximum charging power and the minimum charging power are obtained, and the maximum charging power and the minimum charging power are corrected in combination with the duration of the maximum charging power and the minimum charging power, and a more accurate window deduction power is determined. The charging amount is deducted according to the window deduction power, thereby improving the billing accuracy. In addition, the predicted charging time is corrected by the window deduction power to ensure that the user can obtain the accurate time when the charging is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of fee metering, and in particular to a charging pile charging method and system based on power analysis. Background Art

[0002] With the development of society, the charging device of electric vehicles is a device for charging the battery of electric vehicles. Currently, electric vehicles can be charged through fixed charging piles or portable charging devices.

[0003] The common power-based charging in the existing market is to charge for a power range of the entire process. However, the maximum power in the entire power range or even the initially reported power is used as the calculation value, which leads to large deviation in billing accuracy. Summary of the invention

[0004] In order to solve the above technical problems, a charging pile charging charging method and system based on power analysis are provided. This technical solution solves the problem that the common power-based charging in the existing market mentioned in the above background technology is to charge a power segment for the entire process, but the maximum power in the entire power segment or even the initially reported power is used as the calculated value, resulting in large billing accuracy deviation.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A charging pile charging method based on power analysis, comprising:

[0007] Get the charging amount, the initial power of the charging pile, and the unit price corresponding to the charging power;

[0008] Calculate and process the charging amount, the initial power of the charging pile, and the unit price corresponding to the charging power to obtain the predicted charging time;

[0009] Dividing the predicted charging time into windows to obtain multiple groups of deduction windows; wherein the time lengths of the multiple groups of deduction windows are consistent;

[0010] Performing calculations based on the plurality of groups of deduction windows to determine the window deduction power;

[0011] The charging amount is calculated according to the window deduction power to obtain the remaining charging amount;

[0012] The predicted charging time and the remaining charging amount are corrected according to the remaining charging amount, the window deduction power, and the unit price corresponding to the charging power, and the correction data of the corrected charging time and the charging amount are obtained;

[0013] Draw a curve for each deduction window after charging is completed to obtain multiple sets of power change curves;

[0014] Analyze multiple groups of power change curves to determine the status of the charging pile.

[0015] Preferably, the calculation and processing based on the charging amount, the initial power of the charging pile and the unit price corresponding to the charging power to obtain the predicted charging time specifically includes the following steps:

[0016] Using the initial power of the charging pile as a feature, the unit price corresponding to the charging power is retrieved and processed to determine the charging unit price corresponding to the initial power of the charging pile;

[0017] Calculate and process the charging amount, the initial power of the charging pile, and the charging unit price corresponding to the initial power of the charging pile to obtain the predicted charging time;

[0018] The specific calculation formula for obtaining the predicted charging time is:

[0019]

[0020] In the formula, To predict charging time; is the charging amount; is the initial power of the charging pile; It is the charging unit price corresponding to the initial power of the charging pile.

[0021] Preferably, the calculation and processing based on the multiple groups of deduction windows to determine the window deduction power specifically includes the following steps:

[0022] Obtain the real-time charging time and the real-time charging power corresponding to the real-time charging time;

[0023] Determine the real-time charging time and the length of the fee deduction window;

[0024] If the real-time charging time is greater than or equal to the time length of the deduction window, the real-time charging power is calculated and processed to obtain the window deduction power;

[0025] If the real-time charging time is less than the duration of the deduction window, the real-time charging power will not be calculated.

[0026] Preferably, the step of calculating and processing the real-time charging power to obtain the window charging power specifically includes the following steps:

[0027] Sort the real-time charging power to obtain the maximum charging power and the minimum charging power, that is:

[0028]

[0029] In the formula, is the maximum charging power; is the minimum charging power; is the real-time charging power; n is the number of samples of the real-time charging power in the time length of the deduction window; max() is the maximum value function; min() is the minimum value function;

[0030] The maximum charging power and the minimum charging power are used as features to retrieve and process the time length of the deduction window, and the maximum charging power duration and the minimum power duration are determined;

[0031] The maximum charging power duration and the minimum power duration are judged and processed respectively to obtain a corrected maximum charging power and a corrected minimum charging power;

[0032] The window deduction power is obtained by performing calculation based on the corrected maximum charging power and the corrected minimum charging power.

[0033] Preferably, the determining and processing the maximum charging power duration and the minimum power duration respectively to obtain the corrected maximum charging power and the corrected minimum charging power specifically comprises the following steps:

[0034] Determine the maximum charging power duration and the minimum power duration respectively;

[0035] If the maximum charging power duration is greater than or equal to the set first threshold, the maximum charging power is set to a modified maximum charging power;

[0036] If the maximum charging power duration is less than the set first threshold, select the power data less than the maximum charging power as the corrected maximum charging power, and the corrected maximum charging power duration is greater than or equal to the set first threshold;

[0037] If the minimum charging power duration is greater than or equal to the set second threshold, the minimum charging power is set to a modified minimum charging power;

[0038] If the minimum charging power duration is less than the set second threshold, power data greater than the minimum charging power is selected as the modified minimum charging power, and the modified minimum charging power duration is greater than or equal to the set second threshold.

[0039] Preferably, the calculation and processing based on the modified maximum charging power and the modified minimum charging power to obtain the window charging power specifically includes the following steps:

[0040] The average of the corrected maximum charging power and the corrected minimum charging power is calculated to obtain the average power, that is:

[0041]

[0042] In the formula, is the average power; To correct the maximum charging power; To correct the minimum charging power;

[0043] Correct the average power according to the real-time charging power to obtain the window deduction power;

[0044] The specific calculation formula for obtaining the window charge power is:

[0045]

[0046] In the formula, Deduct power for the window; is the average power; is the real-time charging power; n is the amount of real-time charging power in the time length of the deduction window.

[0047] Preferably, the step of calculating the charging amount according to the window deduction power to obtain the remaining charging amount specifically includes the following steps:

[0048] The unit price corresponding to the charging power is retrieved using the window deduction power as a feature to determine the charging unit price corresponding to the window deduction power;

[0049] Calculate and process the window deduction power, the duration of the deduction window, and the charging unit price corresponding to the window deduction power to obtain the window deduction amount;

[0050] Calculate and process the amount deducted from the window and the amount charged to obtain the remaining amount for charging;

[0051] The specific calculation formula for obtaining the remaining charging amount is:

[0052]

[0053] In the formula, The remaining charging amount; is the charging amount; The length of the deduction window; is the charging unit price corresponding to the window deduction power; N is the number of charged windows.

[0054] Preferably, the method of correcting the predicted charging time and the remaining charging amount according to the remaining charging amount, the window deduction power and the unit price corresponding to the charging power, and obtaining the correction data of the corrected charging time and the charging amount specifically comprises the following steps:

[0055] Set the previous window deduction power as the window deduction power of the next deduction window;

[0056] Acquiring battery status information of the electric vehicle, wherein the battery status information is specifically information on power to be charged;

[0057] The predicted charging time and the remaining charging amount are corrected according to the power information to be charged, the remaining charging amount, the power deducted in the previous window, and the unit price corresponding to the charging power, and the correction data of the corrected charging time and the charging amount are obtained;

[0058] The specific calculation formula for obtaining the correction data of the correction charging time and the charging amount is:

[0059]

[0060] In the formula, The power information to be charged; is the window deduction power; H is the number of required deduction windows corresponding to the power information to be charged; To correct the charging time; To predict charging time; The length of the deduction window; The number of charged deduction windows; Correction data for charging amount; The remaining charging amount; The charging unit price corresponding to the window deduction power.

[0061] Preferably, the analyzing of multiple groups of power change curves to determine the state of the charging pile specifically comprises the following steps:

[0062] Perform differential calculation on the power change curve of each deduction window to obtain multiple groups of power change slopes;

[0063] Calculate the power change slopes of every two adjacent deduction windows to obtain multiple groups of slope offsets;

[0064] Determine multiple groups of slope offsets;

[0065] If the slope offset is greater than or equal to the set third threshold, and the slope offset is less than or equal to the set fourth threshold, the power change curve output for each deduction window is consistent with the normal charging state of the charging pile;

[0066] If the slope offset is less than the set third threshold, or the slope offset is greater than the set fourth threshold, an abnormal slope offset change is output, the deduction window corresponding to the abnormal slope offset change is determined, and the slope offset of the subsequent deduction window is judged. If the slope offset of the subsequent deduction window is less than the set third threshold, or the slope offset is greater than the set fourth threshold, a charging pile charging abnormality is output. If the slope offset of the subsequent deduction window is greater than or equal to the set third threshold, and the slope offset is less than or equal to the set fourth threshold, the charging pile maintenance information is output.

[0067] Furthermore, a charging pile charging charging system based on power analysis is proposed, which is used to implement the charging pile charging charging method based on power analysis as described above, including:

[0068] A power acquisition module, which collects the output power of the charging pile in each deduction window;

[0069] A window division module, wherein the window division module divides the window according to the predicted charging time to obtain multiple groups of deduction windows;

[0070] A calculation module, which is used to calculate the predicted charging time, the window deduction power, the remaining charging amount, the power change slope, and the slope offset;

[0071] A correction module, the correction module is used to calculate correction data for correcting charging time and charging amount;

[0072] A curve drawing module, which is used to draw a curve for each deduction window after charging is completed, and obtain multiple groups of power change curves;

[0073] An analysis module, wherein the analysis module analyzes the charging process of the charging pile according to the power change slope and the slope offset to determine the state of the charging pile;

[0074] A display module, the display module is used to display the predicted charging time and the corrected charging time;

[0075] A control module is used to control information interaction and data sharing between various modules.

[0076] Compared with the prior art, the present invention provides a charging pile charging method and system based on power analysis, which has the following beneficial effects:

[0077] The present invention determines the predicted charging time by analyzing the charging amount and the initial power of the charging pile, and evenly divides the predicted charging time into several groups of deduction windows. When the real-time charging time is consistent with the time length of the deduction window, the real-time charging power in the deduction window is analyzed to obtain the maximum charging power and the minimum charging power. The maximum charging power and the minimum charging power are corrected in combination with the duration of the maximum charging power and the minimum charging power to determine a more accurate window deduction power, and the charging amount is deducted according to the window deduction power, thereby improving the billing accuracy. In addition, the predicted charging time is corrected by the window deduction power to ensure that the user can obtain the accurate time when charging is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 This is a flow chart of steps S100-S800 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0079] Figure 2 This is a flow chart of steps S201-S202 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0080] Figure 3 This is a flow chart of steps S401-S404 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0081] Figure 4 This is a flow chart of steps S4031-S4034 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0082] Figure 5 This is a flow chart of steps S40331-S40335 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0083] Figure 6 This is a flow chart of steps S40341-S40342 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0084] Figure 7 This is a flow chart of steps S501-S503 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0085] Figure 8 This is a flow chart of steps S601-S603 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0086] Fig. 9 This is a flow chart of steps S801-S805 in a charging pile charging charging method based on power analysis proposed by the present invention;

[0087] Fig.10 This is a structural block diagram of a charging pile charging charging system based on power analysis proposed by the present invention. DETAILED DESCRIPTION

[0088] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0089] Reference Figure 1 As shown, a charging pile charging method based on power analysis includes:

[0090] S100, obtaining the charging amount, the initial power of the charging pile, and the unit price corresponding to the charging power;

[0091] S200, calculating and processing according to the charging amount, the initial power of the charging pile and the unit price corresponding to the charging power to obtain the predicted charging time;

[0092] S300, dividing the predicted charging time into windows to obtain multiple groups of deduction windows; wherein the time lengths of the multiple groups of deduction windows are consistent;

[0093] S400, performing calculation processing according to the plurality of groups of deduction windows to determine the window deduction power;

[0094] S500, calculating and processing the charging amount according to the window deduction power to obtain the remaining charging amount;

[0095] S600, correcting the predicted charging time and the remaining charging amount according to the remaining charging amount, the window deduction power, and the unit price corresponding to the charging power, and obtaining correction data of the corrected charging time and the charging amount;

[0096] S700, plotting a curve for each fee deduction window after charging is completed, and obtaining multiple groups of power change curves;

[0097] S800, analyzing multiple groups of power change curves to determine the status of the charging pile;

[0098] Those skilled in the art can understand that by predicting and calculating the charging amount and the initial power of the charging pile, the predicted charging time is determined, and the user can reasonably arrange the time according to the predicted charging time. In addition, the predicted charging time is evenly divided to obtain several groups of deduction windows with the same time length. When the length of the charging time is consistent with the length of the deduction window, the charging power in the deduction window is analyzed to determine the window deduction power of the charged deduction window, and the charging amount is deducted according to the window deduction power and the time length of the deduction window. The window deduction power of the deduction window that has just completed the deduction is used as the window deduction power of the next deduction window to correct the predicted charging time and the remaining charging amount. When charging is completed, the charging power of each deduction window is plotted as a success rate change curve, and the slope offset is calculated according to the power change curve. The slope offset is compared and judged with the set value to analyze whether the charging pile has an abnormality during the charging process. When charging is completed, the abnormal charging pile is repaired to increase the service life of the charging pile.

[0099] Reference Figure 2 As shown, the calculation and processing are performed based on the charging amount, the initial power of the charging pile and the unit price corresponding to the charging power, and the predicted charging time is obtained, which specifically includes the following steps:

[0100] S201, searching and processing the unit price corresponding to the charging power by taking the initial power of the charging pile as a feature, and determining the charging unit price corresponding to the initial power of the charging pile;

[0101] S202, calculating and processing according to the charging amount, the initial power of the charging pile, and the charging unit price corresponding to the initial power of the charging pile to obtain a predicted charging time;

[0102] The specific calculation formula for obtaining the predicted charging time is:

[0103]

[0104] In the formula, To predict charging time; is the charging amount; is the initial power of the charging pile; The charging unit price corresponding to the initial power of the charging pile;

[0105] In this embodiment, the charging time is reasonably predicted based on the charging amount and the initial power of the charging pile, so that the user can reasonably arrange time to complete other tasks according to the predicted charging time.

[0106] Reference Figure 3 As shown, the calculation and processing are performed according to the multiple groups of deduction windows to determine the window deduction power, which specifically includes the following steps:

[0107] S401, obtaining the real-time charging time and the real-time charging power corresponding to the real-time charging time;

[0108] S402, determining the real-time charging time and the length of the fee deduction window;

[0109] S403: If the real-time charging time is greater than or equal to the time length of the deduction window, the real-time charging power is calculated to obtain the window deduction power;

[0110] S404: If the real-time charging time is less than the time length of the deduction window, the real-time charging power is not calculated;

[0111] It will be understood by those skilled in the art that by dividing the predicted charging time into windows, calculating each deduction window, obtaining the window deduction power, calculating the amount based on the window deduction power and the length of the deduction window, and deducting the charging amount, segmented billing can reduce billing errors and make billing more accurate.

[0112] Reference Figure 4 As shown, the real-time charging power is calculated and processed to obtain the window deduction power, which specifically includes the following steps:

[0113] S4031. Sort the real-time charging power to obtain the maximum charging power and the minimum charging power, that is:

[0114]

[0115] In the formula, is the maximum charging power; is the minimum charging power; is the real-time charging power; n is the number of samples of the real-time charging power in the time length of the deduction window; max() is the maximum value function; min() is the minimum value function;

[0116] S4032, searching and processing the time length of the deduction window with the maximum charging power and the minimum charging power as features, and determining the maximum charging power duration and the minimum power duration;

[0117] S4033, respectively determining the maximum charging power duration and the minimum power duration to obtain a corrected maximum charging power and a corrected minimum charging power;

[0118] S4034. Calculate and process according to the corrected maximum charging power and the corrected minimum charging power to obtain the window deduction power.

[0119] Reference Figure 5 As shown, the maximum charging power duration and the minimum power duration are judged and processed respectively, and the corrected maximum charging power and the corrected minimum charging power are obtained, which specifically includes the following steps:

[0120] S40331, respectively determining the maximum charging power duration and the minimum power duration;

[0121] S40332: If the maximum charging power duration is greater than or equal to the set first threshold, the maximum charging power is set to a modified maximum charging power;

[0122] S40333. If the maximum charging power duration is less than the set first threshold, select power data less than the maximum charging power as the corrected maximum charging power, and the corrected maximum charging power duration is greater than or equal to the set first threshold;

[0123] S40334. If the minimum charging power duration is greater than or equal to the set second threshold, the minimum charging power is set to a modified minimum charging power;

[0124] S40335. If the minimum charging power duration is less than the set second threshold, select power data greater than the minimum charging power as the corrected minimum charging power, and the corrected minimum charging power duration is greater than or equal to the set second threshold;

[0125] Those skilled in the art can understand that there will be a maximum charging power and a minimum charging power in the deduction window. If the average value of the maximum charging power and the minimum charging power is used for deduction, the billing error will be increased to a certain extent. Therefore, when the duration of the maximum charging power is less than the set first threshold, the maximum charging power is discarded, and the charging power less than the maximum charging power is taken as the corrected maximum charging power. However, the corrected maximum charging power is greater than other charging powers, and the duration of the corrected maximum charging power is greater than or equal to the set first threshold. The corrected minimum charging power is obtained in the same way. The use of the corrected maximum charging power and the corrected minimum charging power can improve the accuracy of billing.

[0126] Reference Figure 6 As shown, the calculation and processing are performed according to the modified maximum charging power and the modified minimum charging power to obtain the window deduction power, which specifically includes the following steps:

[0127] S40341. Calculate the average of the corrected maximum charging power and the corrected minimum charging power to obtain the average power, that is:

[0128]

[0129] In the formula, is the average power; To correct the minimum charging power; To correct the minimum charging power;

[0130] S40342. Correct the average power according to the real-time charging power to obtain the window deduction power;

[0131] The specific calculation formula for obtaining the window charge power is:

[0132]

[0133] In the formula, Deduct power for the window; is the average power; is the real-time charging power; n is the number of real-time charging power in the time length of the deduction window;

[0134] The charging unit price at the deduction window is determined by comparing the power of each gear in the order feedback based on the window deduction power.

[0135] The power level of the order feedback is set to one level in a power range, and the charging unit price corresponding to the level is set, for example:

[0136] 1st gear: 0W~200W Unit price: 0.3 yuan / h

[0137] Level 2: 201W~400W Unit price: 0.7 yuan / h

[0138] 3rd gear: 401W~600W Unit price: 0.7 yuan / h

[0139] …

[0140] Up to 5 levels can be set;

[0141] It will be understood by those skilled in the art that if the average power of the corrected minimum charging power and the corrected maximum charging power is used as the window deduction power, but the degree of discreteness between the remaining charging power in the deduction window and the average power is large, the billing error will also increase. Therefore, the average power is corrected secondary to the remaining power data in the deduction window to reduce the degree of discreteness between the window deduction power and the remaining charging power in the deduction window, thereby further improving the billing accuracy.

[0142] Reference Figure 7 As shown, the charging amount is calculated according to the window deduction power, and obtaining the remaining charging amount specifically includes the following steps:

[0143] S501, searching and processing the unit price corresponding to the charging power using the window deduction power as a feature, and determining the charging unit price corresponding to the window deduction power;

[0144] S502, calculating and processing according to the window deduction power, the time length of the deduction window, and the charging unit price corresponding to the window deduction power to obtain the window deduction amount;

[0145] S503, calculating and processing according to the window deduction amount and the charging amount to obtain the remaining charging amount;

[0146] The specific calculation formula for obtaining the remaining charging amount is:

[0147]

[0148] In the formula, The remaining charging amount; is the charging amount; The length of the deduction window; is the charging unit price corresponding to the window deduction power; N is the number of charged windows.

[0149] Reference Figure 8 As shown, the predicted charging time and the remaining charging amount are corrected according to the remaining charging amount, the window deduction power and the unit price corresponding to the charging power, and obtaining the correction data of the corrected charging time and charging amount specifically includes the following steps:

[0150] S601, setting the window deduction power of the previous window as the window deduction power of the next window;

[0151] S602, obtaining battery status information of the electric vehicle, wherein the battery status information is specifically information of power to be charged;

[0152] S603, correcting the predicted charging time and the remaining charging amount according to the to-be-charged power information, the remaining charging amount, the deducted power in the previous window, and the unit price corresponding to the charging power, and obtaining correction data of the corrected charging time and the charging amount;

[0153] The specific calculation formula for obtaining the correction data of the correction charging time and the charging amount is:

[0154]

[0155] In the formula, The power information to be charged; is the window deduction power; H is the number of required deduction windows corresponding to the power information to be charged; To correct the charging time; To predict charging time; The length of the deduction window; The number of charged deduction windows; Correction data for charging amount; The remaining charging amount; The charging unit price corresponding to the window deduction power;

[0156] Those skilled in the art will understand that, as charging progresses, the battery power will gradually increase, while the charging power will gradually decrease. Therefore, the predicted charging time needs to be corrected, and the deduction window that has just completed the deduction can be used as a reference for the next deduction window. Therefore, the predicted charging time and the remaining charging amount are corrected by the unit price corresponding to the deduction power and the charging power in the previous window, so that the user can observe the charging status in real time in the display module. In addition, the charging amount deduction status can also be obtained. It is worth noting that the corrected charging time is displayed on the display module as how much time is earlier or longer than the predicted charging time, and the corrected data of the charging amount shows whether the remaining charging amount can meet the charging completion. If it is met and there is a surplus, the remaining amount will be refunded after the charging is completed. If it is not met, the user will be prompted to renew.

[0157] Reference Fig. 9 As shown, analyzing multiple groups of power change curves to determine the charging pile status specifically includes the following steps:

[0158] S801, performing differential calculation on the power change curve of each deduction window to obtain multiple groups of power change slopes;

[0159] S802, calculating according to the power change slope of every two adjacent deduction windows to obtain multiple groups of slope offsets;

[0160] S803, judging multiple groups of slope offsets;

[0161] S804: If the slope offset is greater than or equal to the set third threshold, and the slope offset is less than or equal to the set fourth threshold, outputting the power change curve of each deduction window is consistent with the normal charging state of the charging pile;

[0162] S805. If the slope offset is less than the set third threshold, or the slope offset is greater than the set fourth threshold, output that the slope offset changes abnormally, determine the deduction window corresponding to the slope offset change abnormality, and judge the slope offset of the subsequent deduction window. If the slope offset of the subsequent deduction window is less than the set third threshold, or the slope offset is greater than the set fourth threshold, output that the charging pile is abnormal. If the slope offset of the subsequent deduction window is greater than or equal to the set third threshold, and the slope offset is less than or equal to the set fourth threshold, output the charging pile maintenance information.

[0163] It will be understood by those skilled in the art that when an electric vehicle is being charged, an abnormality may occur in the charging pile. When an abnormality occurs in the charging pile, the electric vehicle may continue to be charged, but the charging power will change, which does not conform to the battery charging law. Therefore, a power change curve is drawn, and the power change curves of adjacent deduction windows are calculated to determine whether the power change curves of two adjacent deduction windows conform to the law. If not, the charging pile is repaired. It is worth noting that the slope can more directly reflect the change of the curve. Therefore, the slope offset is introduced here as a reference for the change in the charging pile state.

[0164] Reference Fig.10 As shown, a charging pile charging charging system based on power analysis is proposed, which is used to implement the charging pile charging charging method based on power analysis as mentioned above, including:

[0165] A power acquisition module, which collects the output power of the charging pile in each deduction window;

[0166] A window division module, wherein the window division module divides the window according to the predicted charging time to obtain multiple groups of deduction windows;

[0167] A calculation module, which is used to calculate the predicted charging time, the window deduction power, the remaining charging amount, the power change slope, and the slope offset;

[0168] A correction module, the correction module is used to calculate correction data for correcting charging time and charging amount;

[0169] A curve drawing module, which is used to draw a curve for each deduction window after charging is completed, and obtain multiple groups of power change curves;

[0170] An analysis module, wherein the analysis module analyzes the charging process of the charging pile according to the power change slope and the slope offset to determine the state of the charging pile;

[0171] A display module, the display module is used to display the predicted charging time and the corrected charging time;

[0172] A control module is used to control information interaction and data sharing between various modules.

[0173] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A charging pile charging method based on power analysis, characterized in that: include: Get the charging amount, the initial power of the charging pile, and the unit price corresponding to the charging power; Calculate and process the charging amount, the initial power of the charging pile, and the unit price corresponding to the charging power to obtain the predicted charging time; The step of calculating and processing according to the charging amount, the initial power of the charging pile and the unit price corresponding to the charging power to obtain the predicted charging time specifically includes the following steps: Using the initial power of the charging pile as a feature, the unit price corresponding to the charging power is retrieved and processed to determine the charging unit price corresponding to the initial power of the charging pile; Calculate and process the charging amount, the initial power of the charging pile, and the charging unit price corresponding to the initial power of the charging pile to obtain the predicted charging time; The specific calculation formula for obtaining the predicted charging time is: Where, T f To predict the charging time; M a P is the charging amount; f is the initial power of the charging pile; M b The charging unit price corresponding to the initial power of the charging pile; Dividing the predicted charging time into windows to obtain multiple groups of deduction windows; wherein the time lengths of the multiple groups of deduction windows are consistent; Performing calculations based on the plurality of groups of deduction windows to determine the window deduction power; The charging amount is calculated according to the window deduction power to obtain the remaining charging amount; The predicted charging time and the remaining charging amount are corrected according to the remaining charging amount, the window deduction power, and the unit price corresponding to the charging power, and the correction data of the corrected charging time and the charging amount are obtained; Draw a curve for each deduction window after charging is completed to obtain multiple sets of power change curves; Analyze multiple groups of power change curves to determine the status of the charging pile.

2. A charging pile charging method based on power analysis according to claim 1, characterized in that: The calculation and processing according to the plurality of groups of the deduction windows to determine the window deduction power specifically comprises the following steps: Obtain the real-time charging time and the real-time charging power corresponding to the real-time charging time; Determine the real-time charging time and the length of the fee deduction window; If the real-time charging time is greater than or equal to the time length of the deduction window, the real-time charging power is calculated and processed to obtain the window deduction power; If the real-time charging time is less than the duration of the deduction window, the real-time charging power will not be calculated.

3. A charging pile charging method based on power analysis according to claim 2, characterized in that: The calculation and processing of the real-time charging power to obtain the window deduction power specifically includes the following steps: Sort the real-time charging power to obtain the maximum charging power and the minimum charging power, that is: Where P max is the maximum charging power; P min is the minimum charging power; P i is the real-time charging power; n is the number of samples of the real-time charging power in the time length of the deduction window; max() is the maximum value function; min() is the minimum value function; The maximum charging power and the minimum charging power are used as features to retrieve and process the time length of the deduction window, and the maximum charging power duration and the minimum power duration are determined; The maximum charging power duration and the minimum power duration are judged and processed respectively to obtain a corrected maximum charging power and a corrected minimum charging power; The window deduction power is obtained by performing calculation based on the corrected maximum charging power and the corrected minimum charging power.

4. A charging pile charging method based on power analysis according to claim 3, characterized in that: The determining and processing of the maximum charging power duration and the minimum power duration to obtain the corrected maximum charging power and the corrected minimum charging power specifically includes the following steps: Determine the maximum charging power duration and the minimum power duration respectively; If the maximum charging power duration is greater than or equal to the set first threshold, the maximum charging power is set to a modified maximum charging power; If the maximum charging power duration is less than the set first threshold, select the power data less than the maximum charging power as the corrected maximum charging power, and the corrected maximum charging power duration is greater than or equal to the set first threshold; If the minimum charging power duration is greater than or equal to the set second threshold, the minimum charging power is set to a modified minimum charging power; If the minimum charging power duration is less than the set second threshold, power data greater than the minimum charging power is selected as the modified minimum charging power, and the modified minimum charging power duration is greater than or equal to the set second threshold.

5. A charging pile charging method based on power analysis according to claim 3, characterized in that: The calculation and processing based on the modified maximum charging power and the modified minimum charging power to obtain the window charging power specifically includes the following steps: The average of the corrected maximum charging power and the corrected minimum charging power is calculated to obtain the average power, that is: Where P q is the average power; P m1 To correct the maximum charging power; P m2 To correct the minimum charging power; Correct the average power according to the real-time charging power to obtain the window deduction power; The specific calculation formula for obtaining the window charge power is: Where P M P is the window deduction power; q is the average power; P i is the real-time charging power; n is the amount of real-time charging power in the time length of the deduction window.

6. A charging pile charging method based on power analysis according to claim 1, characterized in that: The calculation and processing of the charging amount according to the window deduction power to obtain the remaining charging amount specifically includes the following steps: The unit price corresponding to the charging power is retrieved using the window deduction power as a feature to determine the charging unit price corresponding to the window deduction power; Calculate and process the window deduction power, the time length of the deduction window, and the charging unit price corresponding to the window deduction power to obtain the window deduction amount; Calculate and process the amount deducted from the window and the amount charged to obtain the remaining amount for charging; The specific calculation formula for obtaining the remaining charging amount is: M r =M a -T a ×M c ×N; Where M r M is the remaining charge amount; a is the charging amount; T a M is the length of the deduction window; c is the charging unit price corresponding to the window deduction power; N is the number of charged windows.

7. A charging pile charging method based on power analysis according to claim 1, characterized in that: The method of correcting the predicted charging time and the remaining charging amount according to the remaining charging amount, the window deduction power and the unit price corresponding to the charging power, and obtaining the correction data of the corrected charging time and the charging amount specifically includes the following steps: Set the previous window deduction power as the window deduction power of the next deduction window; Acquiring battery status information of the electric vehicle, wherein the battery status information is specifically information on power to be charged; The predicted charging time and the remaining charging amount are corrected according to the power information to be charged, the remaining charging amount, the power deducted in the previous window, and the unit price corresponding to the charging power, and the correction data of the corrected charging time and the charging amount are obtained; The specific calculation formula for obtaining the correction data of the correction charging time and the charging amount is: Where P h P is the power information to be charged; M is the window deduction power; H is the number of required deduction windows corresponding to the charging power information; T d To correct the charging time; T f To predict the charging time; T a is the length of the deduction window; α is the number of charged deduction windows; M d M is the correction data of the charging amount; r M is the remaining charge amount; c The charging unit price corresponding to the window deduction power.

8. The charging charging method for a charging pile based on power analysis according to claim 1, characterized in that: The analysis of multiple groups of power change curves to determine the charging pile status specifically includes the following steps: Perform differential calculation on the power change curve of each deduction window to obtain multiple groups of power change slopes; Calculate the power change slopes of every two adjacent deduction windows to obtain multiple groups of slope offsets; Determine multiple groups of slope offsets; If the slope offset is greater than or equal to the set third threshold, and the slope offset is less than or equal to the set fourth threshold, the power change curve output for each deduction window is consistent with the normal charging state of the charging pile; If the slope offset is less than the set third threshold, or the slope offset is greater than the set fourth threshold, an abnormal slope offset change is output, the deduction window corresponding to the abnormal slope offset change is determined, and the slope offset of the subsequent deduction window is judged. If the slope offset of the subsequent deduction window is less than the set third threshold, or the slope offset is greater than the set fourth threshold, a charging pile charging abnormality is output. If the slope offset of the subsequent deduction window is greater than or equal to the set third threshold, and the slope offset is less than or equal to the set fourth threshold, the charging pile maintenance information is output.

9. A charging pile charging charging system based on power analysis, used to implement the charging pile charging charging method based on power analysis as described in any one of claims 1 to 8, characterized in that: include: A power acquisition module, which collects the output power of the charging pile in each deduction window; A window division module, wherein the window division module divides the window according to the predicted charging time to obtain multiple groups of deduction windows; A calculation module, which is used to calculate the predicted charging time, window deduction power, remaining charging amount, power change slope, and slope offset; A correction module, the correction module is used to calculate correction data for correcting charging time and charging amount; A curve drawing module, which is used to draw a curve for each deduction window after charging is completed, and obtain multiple groups of power change curves; An analysis module, wherein the analysis module analyzes the charging process of the charging pile according to the power change slope and the slope offset to determine the state of the charging pile; A display module, the display module is used to display the predicted charging time and the corrected charging time; A control module is used to control information interaction and data sharing between various modules.

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