Method and device for estimating remaining charging time

Abstract

The present invention discloses a method and device for estimating the remaining charging time. The method comprises: obtaining seasonal scenario statistical information; determining a power battery's charging scenario based on the seasonal scenario statistical information, wherein the charging scenario includes a seasonal charging scenario and a temperature charging scenario; and estimating the remaining charging time of the power battery based on the power battery's state of charge (SOC) value and a calibrated remaining charging time value. The technical solution provided by the present invention solves the problem of inaccurate remaining charging time estimation for power batteries.

Description

Technical Field

[0001] The present invention relates to the technical field of battery charging, and in particular to a method and device for estimating remaining charging time. Background Art

[0002] With the development of battery technology, people's demand for battery charging is increasing. Due to the complexity of battery charging characteristics, the variability of the charging process, and external factors such as ambient temperature and the uncertainty of charging current of charging piles, accurately predicting the remaining charging time is complex and difficult.

[0003] Existing methods for estimating the remaining charging time of power batteries have the problem of low accuracy of the estimated results, which has become a technical problem that needs to be urgently solved in the industry. Summary of the Invention

[0004] Embodiments of the present invention provide a method and device for estimating remaining charging time, so as to solve the problem of low accuracy of the result of estimating the remaining charging time of a power battery.

[0005] In order to achieve the above technical problems, the present invention adopts the following technical solutions:

[0006] An embodiment of the present invention provides a method for estimating remaining charging time, comprising:

[0007] Get seasonal scene statistics;

[0008] Determine the charging scenario of the power battery based on seasonal scenario statistical information, wherein the charging scenario includes seasonal charging scenario and temperature charging scenario;

[0009] According to the charging scenario, the remaining charging time of the power battery is estimated based on the SOC value of the power battery and the calibrated value of the remaining charging time.

[0010] Optionally, determining the charging scenario of the power battery according to seasonal scenario statistical information includes:

[0011] Comparing the seasonal scene statistical information with a preset threshold to obtain a first comparison result;

[0012] When the seasonal scene statistical information is greater than or equal to the preset threshold, determining that the power battery is in a seasonal charging scene;

[0013] When the seasonal scene statistical information is less than the preset threshold, it is determined that the power battery is in a temperature charging scene.

[0014] Optionally, the estimating the remaining charging time of the power battery according to the charging scenario and based on the SOC value and the calibrated value of the remaining charging time of the power battery includes:

[0015] When the power battery is in a seasonal charging scenario, the remaining time calibration value is used as the remaining charging time of the power battery according to the SOC value of the power battery;

[0016] When the power battery is in a temperature charging scenario, temperature information of the power battery is obtained, and the remaining charging time of the power battery is determined according to the temperature information of the power battery and the SOC value of the power battery.

[0017] Optionally, obtaining the temperature information of the power battery includes:

[0018] Obtain the initial entry temperature of the power battery;

[0019] Obtain historical temperature information of the power battery at the end of the last full charge.

[0020] Optionally, determining the remaining charging time of the power battery according to the temperature information of the power battery and the SOC value of the power battery includes:

[0021] determining a temperature range charging scenario for the power battery according to the initial entry temperature of the power battery and the historical temperature information;

[0022] Subtracting the initial entry temperature of the power battery from the historical temperature information to obtain a first temperature difference value;

[0023] Comparing the first temperature difference value with a preset temperature difference threshold to obtain a second comparison result;

[0024] The remaining charging time of the power battery is determined according to the second comparison result.

[0025] Optionally, determining the remaining charging time of the power battery according to the second comparison result includes:

[0026] When the first temperature difference is less than or equal to a preset temperature difference threshold, the initial entry temperature, the historical temperature information, and the remaining charging time corresponding to each temperature interval charging scenario corresponding to the first temperature difference are averaged to obtain a first full charge calculation reference value;

[0027] The remaining charging time of the power battery is determined according to the first full-charge calculation reference value and the SOC value of the power battery.

[0028] Optionally, determining the remaining charging time of the power battery according to the second comparison result includes:

[0029] When the first temperature difference value is greater than a preset temperature difference threshold, the initial entry temperature is added to a preset temperature parameter to obtain second temperature information;

[0030] A second full charge calculation reference value is obtained by averaging the initial entry temperature, the second temperature information, and the remaining charging time corresponding to each temperature interval charging scenario corresponding to the preset temperature parameter;

[0031] The remaining charging time of the power battery is determined according to the second full-charge calculation reference value and the SOC value of the power battery.

[0032] Optionally, after determining the remaining charging time of the power battery according to the second comparison result, the method further includes:

[0033] charging the power battery, and after charging is completed, determining whether the charging process meets the seasonal charging scenario;

[0034] If the seasonal charging scenario is met, updating seasonal scenario statistical information, wherein the seasonal scenario statistical information includes statistical information of summer scenarios, statistical information of winter scenarios, and statistical information of spring and autumn scenarios;

[0035] If the seasonal charging scenario is not met, the seasonal scenario statistical information is cleared.

[0036] Optionally, before obtaining seasonal scene statistics, the method further includes:

[0037] Establish at least two charging scenarios;

[0038] Based on each of the charging scenarios, initial parameter calibration is performed to obtain a calibration value of the remaining charging time;

[0039] If the power battery meets the preset charging conditions, parameter self-learning correction is performed.

[0040] According to another aspect of the present invention, a device for estimating remaining charging time is provided, comprising:

[0041] Acquisition module, used to obtain seasonal scene statistics;

[0042] A scenario determination module is used to determine the charging scenario of the power battery based on seasonal scenario statistical information, wherein the charging scenario includes seasonal charging scenario and temperature charging scenario;

[0043] An evaluation module is used to evaluate the remaining charging time of the power battery according to the charging scenario, based on the SOC value of the power battery and the calibration value of the remaining charging time.

[0044] The remaining charging time estimation method provided in an embodiment of the present invention obtains seasonal scenario statistical information, determines the charging scenario of the power battery based on the seasonal scenario statistical information, and determines whether the power battery meets the seasonal charging scenario. Based on the determined charging scenario, the remaining charging time of the power battery is evaluated based on the power battery's SOC value and the calibrated remaining charging time value. By performing separate evaluations of seasonal charging scenarios and temperature charging scenarios, it can improve both the evaluation efficiency in seasonal charging scenarios and the accuracy of remaining charging time estimation in temperature charging scenarios, thus resolving the issue of low accuracy in the remaining charging time estimation results of power batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0046] Figure 1 This is a flow chart of a method for estimating remaining charging time provided by an embodiment of the present invention;

[0047] Figure 2 is a flow chart of another method for estimating remaining charging time provided by an embodiment of the present invention;

[0048] Figure 3 This is a flowchart of another method for estimating remaining charging time provided by an embodiment of the present invention;

[0049] Figure 4 This is a flow chart of a method for estimating the remaining charging time when a power battery is in a temperature charging scenario, provided by an embodiment of the present invention;

[0050] Figure 5 2 is a schematic diagram of a device for estimating remaining charging time provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0052] Based on the above technical problems, this embodiment proposes the following solutions:

[0053] Figure 1 This is a flow chart of a method for estimating the remaining charging time provided by an embodiment of the present invention. Figure 1 The method for estimating the remaining charging time provided in this embodiment includes:

[0054] S101. Obtain seasonal scene statistical information.

[0055] Specifically, seasonal scenario statistical information includes the cumulative number of times the current power battery temperature meets the seasonal charging scenario. Seasonal scenario statistical information is a numerical value. Seasonal charging scenarios include summer charging scenarios, winter charging scenarios, and spring and autumn charging scenarios. Each seasonal charging scenario can correspond to a numerical value. For example, the summer charging scenario corresponds to summer scenario statistical information N1, the winter charging scenario corresponds to winter scenario statistical information N2, and the spring and autumn charging scenario corresponds to spring and autumn scenario statistical information N3.

[0056] S102: Determine a charging scenario for the power battery based on seasonal scenario statistical information, where the charging scenario includes a seasonal charging scenario and a temperature charging scenario.

[0057] Specifically, seasonal scenario statistics can be used to determine whether the current power battery meets the seasonal charging scenario. In seasonal charging scenarios, the battery's charging state is relatively stable. Estimating the remaining charging time of the power battery based on seasonal charging scenarios can reduce the computational complexity of the evaluation and improve the efficiency of the remaining charging time evaluation.

[0058] When the power battery does not meet the seasonal charging scenario, the remaining charging time of the power battery is evaluated under the temperature charging scenario.

[0059] S103 : Evaluate the remaining charging time of the power battery according to the charging scenario and based on the SOC value and the calibrated value of the remaining charging time of the power battery.

[0060] Specifically, because different charging scenarios correspond to different charging speeds of the power battery, the remaining charging time calibration value is a pre-calibrated value of the remaining charging time corresponding to different SOC values ​​in each charging scenario before evaluating the remaining charging time of the power battery.

[0061] According to the charging scenario of the power battery, based on the SOC value of the power battery, the remaining charging time calibration value corresponding to the SOC value of the power battery is found, and then the remaining charging time of the power battery is determined, thereby achieving a more accurate assessment of the remaining charging time of the power battery.

[0062] The remaining charging time estimation method provided in this embodiment obtains seasonal scenario statistical information and, based on this information, determines the power battery's charging scenario, thereby determining whether the power battery meets the seasonal charging scenario. Based on the determined charging scenario, the remaining charging time of the power battery is estimated based on the power battery's SOC value and the calibrated remaining charging time value. By separately evaluating seasonal charging scenarios and temperature charging scenarios, this method improves both the evaluation efficiency in seasonal charging scenarios and the accuracy of remaining charging time estimation in temperature charging scenarios, thereby resolving the issue of low accuracy in power battery remaining charging time estimation results.

[0063] Optional, Figure 2 This is a flow chart of another method for estimating the remaining charging time provided by an embodiment of the present invention. Figure 2 The method for estimating the remaining charging time provided in this embodiment includes:

[0064] S101. Obtain seasonal scene statistical information.

[0065] S201: Compare the seasonal scene statistical information with a preset threshold to obtain a first comparison result.

[0066] Specifically, the preset threshold value may be set to 5 or 6, or other values. The seasonal scene statistical information is subtracted from or quotiented by the preset threshold value to obtain a first comparison result.

[0067] S202: When the seasonal scenario statistical information is greater than or equal to the preset threshold, determine that the power battery is in a seasonal charging scenario.

[0068] Specifically, when the seasonal scenario statistical information is greater than or equal to a preset threshold, for example, 5, it is determined that the power battery is in a seasonal charging scenario.

[0069] Exemplarily, seasonal charging scenarios include summer charging scenarios, winter charging scenarios, and spring and autumn charging scenarios. If the summer scenario statistical information N1 is greater than or equal to a preset threshold, for example, 5, the power battery is determined to be in the summer charging scenario. If the winter scenario statistical information N2 is greater than or equal to a preset threshold, for example, 5, the power battery is determined to be in the winter charging scenario. If the spring and autumn scenario statistical information N3 is greater than or equal to a preset threshold, for example, 5, the power battery is determined to be in the spring and autumn charging scenario.

[0070] S203: When the seasonal scene statistical information is less than the preset threshold, determine that the power battery is in a temperature charging scene.

[0071] Specifically, when the seasonal scene statistical information is less than a preset threshold, for example, 5, it is determined that the power battery is in a temperature charging scenario.

[0072] Exemplarily, the summer scene statistical information N1 can be set to be less than a preset threshold, for example, 5, and the winter scene statistical information N2 can be set to be less than a preset threshold, for example, 5, and the spring and autumn scene statistical information N3 can be set to be less than a preset threshold, for example, 5, to determine that the power battery is in a temperature charging scenario.

[0073] S103 : Evaluate the remaining charging time of the power battery according to the charging scenario and based on the SOC value and the calibrated value of the remaining charging time of the power battery.

[0074] Optional, Figure 3 This is a flow chart of another method for estimating the remaining charging time provided by an embodiment of the present invention. Figure 3 The method for estimating the remaining charging time provided in this embodiment includes:

[0075] S101. Obtain seasonal scene statistical information.

[0076] S102: Determine a charging scenario for the power battery based on seasonal scenario statistical information, where the charging scenario includes a seasonal charging scenario and a temperature charging scenario.

[0077] S301: When the power battery is in a seasonal charging scenario, use the remaining time calibration value as the remaining charging time of the power battery according to the SOC value of the power battery.

[0078] Specifically, when the power battery is charged in a seasonal mode, the remaining time calibration value is used as the remaining charging time of the power battery based on the SOC value of the power battery. This setting can quickly and accurately determine the remaining charging time of the power battery.

[0079] S302: When the power battery is in a temperature charging scenario, obtain temperature information of the power battery, and determine the remaining charging time of the power battery according to the temperature information of the power battery and the SOC value of the power battery.

[0080] Specifically, when the power battery is charging in a temperature-dependent charging scenario, the power battery temperature information must first be obtained. Based on this temperature information, the temperature range in which the power battery is charging is determined. Each temperature range corresponds to a different remaining charging time for each power battery. Based on the power battery's SOC value, the remaining charging time within the power battery's temperature range is determined.

[0081] In an optional implementation manner, obtaining the temperature information of the power battery includes:

[0082] Obtain the initial entry temperature of the power battery; obtain the historical temperature information of the power battery at the end of the last full charge.

[0083] Specifically, the initial entry temperature of the power battery is the initial entry temperature of the power battery when the charging gun is inserted into the power battery before charging begins. The historical temperature information of the power battery at the end of the last full charge is the temperature information of the power battery when it was most recently fully charged before the current charge.

[0084] It should be noted that the power battery is a new battery, and the historical temperature information of the power battery at the end of the last full charge may be initially set to be 45° C.

[0085] Optional, Figure 4 This is a flow chart of a method for estimating the remaining charging time when the power battery is in a temperature charging scenario provided by an embodiment of the present invention. Figure 4 , determining the remaining charging time of the power battery according to the temperature information of the power battery and the SOC value of the power battery includes:

[0086] S401 : Determine a temperature range charging scenario for the power battery according to the initial entry temperature of the power battery and the historical temperature information.

[0087] Specifically, the temperature range charging scenarios include: -30℃~0℃ temperature scenario, 0℃~20℃ temperature scenario, 20℃~30℃ temperature scenario, 30℃~40℃ temperature scenario, 40℃~50℃ temperature scenario and 50℃~60℃ temperature scenario.

[0088] For example, the initial entry temperature is 25° C. and the historical temperature information is 50° C. Based on the initial entry temperature and the historical temperature information of the power battery, the temperature range charging scenarios for the power battery are determined to be 20° C. to 30° C., 30° C. to 40° C., and 40° C. to 50° C.

[0089] S402 : Subtract the initial entry temperature of the power battery from the historical temperature information to obtain a first temperature difference value.

[0090] Specifically, the initial entry temperature of the power battery is subtracted from the historical temperature information. For example, the initial entry temperature is 25° C., and the historical temperature information is 50° C., and the first temperature difference value is 25° C.

[0091] S403: Compare the first temperature difference value with a preset temperature difference threshold to obtain a second comparison result.

[0092] Specifically, the preset temperature difference threshold can be set as needed, for example, it can be set to 30° C. The first temperature difference value is subtracted or divided by the preset temperature difference threshold to obtain a second comparison result.

[0093] S404: Determine the remaining charging time of the power battery according to the second comparison result.

[0094] Specifically, when the first temperature difference is less than a preset threshold and when the first temperature difference is greater than or equal to the preset threshold, the method for estimating the remaining charging time of the power battery is different.

[0095] An optional implementation manner, determining the remaining charging time of the power battery based on the second comparison result, includes: when the first temperature difference value is less than or equal to a preset temperature difference threshold, averaging the initial entry temperature and the historical temperature information and the remaining charging time corresponding to the charging scenarios in each temperature interval corresponding to the first temperature difference value to obtain a first full charge calculation reference value; determining the remaining charging time of the power battery based on the first full charge calculation reference value and the SOC value of the power battery.

[0096] For example, when the first temperature difference is less than or equal to a preset temperature difference threshold, the initial entry temperature may be set to 25° C., and the historical temperature information may be set to 50° C. The first temperature difference is 25° C.

[0097] The temperature range corresponding to the initial entry temperature is set to 20°C to 30°C. The temperature range corresponding to the historical temperature information is set to 40°C to 50°C. The first temperature difference is 25°C, spanning three temperature ranges. The average of the remaining charging times corresponding to the 20°C to 30°C, 30°C to 40°C, and 40°C to 50°C temperature ranges is used to obtain the first full charge calculation benchmark value.

[0098] The remaining charging time of the power battery is determined according to the first full-charge calculation reference value and the SOC value of the power battery.

[0099] Another optional implementation manner is to determine the remaining charging time of the power battery based on the second comparison result, including: when the first temperature difference value is greater than the preset temperature difference threshold, adding the preset temperature parameter to the initial entry temperature to obtain the second temperature information; averaging the remaining charging time corresponding to the charging scenarios in each temperature range corresponding to the initial entry temperature, the second temperature information and the preset temperature parameter to obtain a second full charge calculation reference value; and determining the remaining charging time of the power battery based on the second full charge calculation reference value and the SOC value of the power battery.

[0100] For example, the initial entry temperature can be set to 25°C, and the historical temperature information can be set to 65°C. The first temperature difference value is 40°C. When the first temperature difference value, such as 40°C, is greater than the preset temperature difference threshold, such as 30°C, the initial entry temperature, such as 25°C, is added to the preset temperature parameter, such as 30°C, to obtain the second temperature information, 55°C; the initial entry temperature, the second temperature information, and the preset temperature parameter corresponding to each temperature range charging scenario, namely, the 20°C to 30°C temperature scenario, the 30°C to 40°C temperature scenario, the 40°C to 50°C temperature scenario, and the 50°C to 60°C temperature scenario are averaged to obtain the second full charge calculation reference value.

[0101] The remaining charging time of the power battery is determined according to the second full-charge calculation reference value and the SOC value of the power battery.

[0102] Another optional implementation, after determining the remaining charging time of the power battery according to the second comparison result, may also include: charging the power battery, and after the charging is completed, judging whether the charging process meets the seasonal charging scenario; if the seasonal charging scenario is met, updating the seasonal scenario statistical information, wherein the seasonal scenario statistical information includes statistical information of the summer scenario, statistical information of the winter scenario, and statistical information of the spring and autumn scenarios; if the seasonal charging scenario is not met, clearing the seasonal scenario statistical information.

[0103] Specifically, the power battery is charged until it is fully charged. After charging is completed, it is determined whether the charging process meets the seasonal charging scenario. If the seasonal charging scenario is met, the seasonal scenario statistics are incremented by 1. If the seasonal charging scenario is not met, the seasonal scenario statistics for the power battery are reset to zero.

[0104] For example, if the seasonal charging scenario is met, for example, the summer charging scenario is met, the statistical information of the summer scenario is incremented by 1; if the winter charging scenario is met, the statistical information of the winter scenario is incremented by 1; if the spring and autumn charging scenarios are met, the statistical information of the spring and autumn scenarios is incremented by 1. If none of the above seasonal charging scenarios are met, the statistical information of each seasonal scenario is cleared.

[0105] Another optional implementation method, before obtaining seasonal scenario statistical information, also includes: establishing at least two charging scenarios; performing initial parameter calibration based on each charging scenario to obtain a calibration value of the remaining charging time; if the power battery meets the preset charging conditions, performing parameter self-learning correction.

[0106] Specifically, at least two charging scenarios are established, wherein the seasonal charging scenario includes the ambient temperature, the initial temperature of the power battery, the minimum temperature of the power battery, the maximum temperature of the power battery, and the SOC state of the power battery.

[0107] Based on each charging scenario, initial parameter calibration is performed to obtain a calibration value of the remaining charging time. For example, before running the algorithm program for the first time, the initial remaining charging time of each charging scenario needs to be written into the EEPROM, and the data can be obtained through calibration.

[0108] For seasonal charging scenarios, a full charge test from 0% SOC to 100% is required, provided that the ambient temperature, initial battery temperature, minimum battery temperature, and maximum battery temperature all meet the required conditions. The remaining charging time for the entire process is recorded as the final calibration data. For example, a summer charging scenario requires an ambient temperature of 28°C to 45°C, an initial battery temperature of 15°C to 45°C, a minimum battery temperature of 15°C, and a maximum battery temperature of 60°C.

[0109] It should be noted that the specific seasonal temperature can be adjusted according to the vehicle sales area and seasonal characteristics to adapt to different regional needs.

[0110] For temperature range charging scenarios, it is necessary to limit the power battery temperature to this temperature range and perform a SOC test from 0% to 100% full charge, and record the remaining charging time of the entire process as the final calibration data.

[0111] If the power battery meets the preset charging conditions, the parameters will be self-learned and corrected. During actual vehicle use, if the following conditions are met at the same time, the charging data will be stored and the parameters will be self-learned and corrected: ambient temperature, power battery initial temperature, power battery temperature range that meets the charging scenario, SOC charging capacity >= 70%, and full charge position.

[0112] The remaining charging time data and the cumulative number of charge and discharge times of the power battery are stored. The average remaining charging time is calculated and stored after fusing the current data with the previous data. This data is used as the initial data for calculating the remaining charging time next time.

[0113] Figure 5 This is a schematic diagram of a device for estimating the remaining charging time provided by an embodiment of the present invention. Figure 5 The present invention provides a device for estimating the remaining charging time, comprising:

[0114] An acquisition module 51 is used to obtain seasonal scene statistical information;

[0115] A scenario determination module 52 is configured to determine a charging scenario for the power battery based on seasonal scenario statistical information, wherein the charging scenario includes a seasonal charging scenario and a temperature charging scenario;

[0116] The evaluation module 53 is configured to evaluate the remaining charging time of the power battery according to the charging scenario, based on the SOC value of the power battery and the calibration value of the remaining charging time.

[0117] Optionally, the scene determination module 52 is specifically configured to:

[0118] Comparing the seasonal scene statistical information with a preset threshold to obtain a first comparison result;

[0119] When the seasonal scene statistical information is greater than or equal to the preset threshold, determining that the power battery is in a seasonal charging scene;

[0120] When the seasonal scene statistical information is less than the preset threshold, it is determined that the power battery is in a temperature charging scene.

[0121] Optionally, the evaluation module 53 is specifically configured to:

[0122] When the power battery is in a seasonal charging scenario, the remaining time calibration value is used as the remaining charging time of the power battery according to the SOC value of the power battery;

[0123] When the power battery is in a temperature charging scenario, temperature information of the power battery is obtained, and the remaining charging time of the power battery is determined according to the temperature information of the power battery and the SOC value of the power battery.

[0124] Optionally, the acquisition module 51 is specifically configured to:

[0125] Obtain the initial entry temperature of the power battery;

[0126] Obtain historical temperature information of the power battery at the end of the last full charge.

[0127] The device for estimating the remaining charging time provided in this embodiment obtains seasonal scenario statistical information through an acquisition module. The charging scenario of the power battery is determined based on the seasonal scenario statistical information through a scenario determination module to determine whether the power battery meets the seasonal charging scenario. Then, the remaining charging time of the power battery is evaluated based on the SOC value and the calibration value of the remaining charging time of the power battery according to the determined charging scenario through an evaluation module. The device for estimating the remaining charging time provided in this embodiment performs separate evaluations through seasonal charging scenarios and temperature charging scenarios, which can not only improve the evaluation efficiency in seasonal charging scenarios, but also improve the accuracy of the remaining charging time evaluation in temperature charging scenarios, thereby solving the problem of low accuracy of the results of the remaining charging time estimation of the power battery.

[0128] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for estimating remaining charging time, characterized in that: include: Get seasonal scene statistics; Determine the charging scenario of the power battery based on seasonal scenario statistical information, wherein the charging scenario includes seasonal charging scenario and temperature charging scenario; According to the charging scenario, based on the SOC value of the power battery and the calibrated value of the remaining charging time, the remaining charging time of the power battery is evaluated; The estimating the remaining charging time of the power battery according to the charging scenario and based on the SOC value and the calibrated value of the remaining charging time of the power battery includes: When the power battery is in a seasonal charging scenario, the remaining time calibration value is used as the remaining charging time of the power battery according to the SOC value of the power battery; When the power battery is in a temperature charging scenario, temperature information of the power battery is obtained, and the remaining charging time of the power battery is determined according to the temperature information of the power battery and the SOC value of the power battery.

2. The method according to claim 1, characterized in that The determining of the power battery charging scenario based on seasonal scenario statistical information includes: Comparing the seasonal scene statistical information with a preset threshold to obtain a first comparison result; When the seasonal scene statistical information is greater than or equal to the preset threshold, determining that the power battery is in a seasonal charging scene; When the seasonal scene statistical information is less than the preset threshold, it is determined that the power battery is in a temperature charging scene.

3. The method according to claim 1, characterized in that The obtaining of the temperature information of the power battery includes: Obtain the initial entry temperature of the power battery; Obtain historical temperature information of the power battery at the end of the last full charge.

4. The method according to claim 3, characterized in that The determining the remaining charging time of the power battery according to the temperature information of the power battery and the SOC value of the power battery includes: determining a temperature range charging scenario for the power battery according to the initial entry temperature of the power battery and the historical temperature information; Subtracting the initial entry temperature of the power battery from the historical temperature information to obtain a first temperature difference value; Comparing the first temperature difference value with a preset temperature difference threshold to obtain a second comparison result; The remaining charging time of the power battery is determined according to the second comparison result.

5. The method according to claim 4, characterized in that The determining, based on the second comparison result, the remaining charging time of the power battery includes: When the first temperature difference is less than or equal to a preset temperature difference threshold, the initial entry temperature, the historical temperature information, and the remaining charging time corresponding to each temperature interval charging scenario corresponding to the first temperature difference are averaged to obtain a first full charge calculation reference value; The remaining charging time of the power battery is determined according to the first full-charge calculation reference value and the SOC value of the power battery.

6. The method according to claim 4, characterized in that The determining, based on the second comparison result, the remaining charging time of the power battery includes: When the first temperature difference value is greater than a preset temperature difference threshold, the initial entry temperature is added to a preset temperature parameter to obtain second temperature information; A second full charge calculation reference value is obtained by averaging the initial entry temperature, the second temperature information, and the remaining charging time corresponding to each temperature interval charging scenario corresponding to the preset temperature parameter; The remaining charging time of the power battery is determined according to the second full-charge calculation reference value and the SOC value of the power battery.

7. The method according to claim 4, characterized in that After determining the remaining charging time of the power battery according to the second comparison result, the method further includes: charging the power battery, and after charging is completed, determining whether the charging process meets the seasonal charging scenario; If the seasonal charging scenario is met, updating seasonal scenario statistical information, wherein the seasonal scenario statistical information includes statistical information of summer scenarios, statistical information of winter scenarios, and statistical information of spring and autumn scenarios; If the seasonal charging scenario is not met, the seasonal scenario statistical information is cleared.

8. The method according to claim 1, characterized in that Before obtaining seasonal scene statistics, it also includes: Establish at least two charging scenarios; Based on each of the charging scenarios, initial parameter calibration is performed to obtain a calibration value of the remaining charging time; If the power battery meets the preset charging conditions, parameter self-learning correction is performed.

9. A device for estimating remaining charging time, controlled by the method for estimating remaining charging time according to any one of claims 1 to 8, characterized in that: include: Acquisition module, used to obtain seasonal scene statistics; A scenario determination module is used to determine the charging scenario of the power battery based on seasonal scenario statistical information, wherein the charging scenario includes seasonal charging scenario and temperature charging scenario; An evaluation module is used to evaluate the remaining charging time of the power battery according to the charging scenario, based on the SOC value of the power battery and the calibration value of the remaining charging time.

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