Method and device for determining residual charging duration and nonvolatile storage medium

Abstract

The invention discloses a method and a device for determining residual charging time and a nonvolatile storage medium. The method comprises the steps that the battery temperature of a target vehicle in a charging state is obtained; determining a target charging stage corresponding to the target vehicle based on the battery temperature; based on the battery temperature and the target charging stage, the initial charging remaining duration of the target vehicle is determined; correction coefficients corresponding to multiple charging stages corresponding to the target vehicle are obtained, and the correction coefficients corresponding to the multiple charging stages are determined based on the historical charging condition of the target vehicle; and based on the correction coefficients corresponding to the plurality of charging stages and the initial charging remaining duration, determining the target charging remaining duration of the target vehicle. The technical problem that the estimation result is inaccurate due to the fact that the residual charging time length is estimated based on the estimated SOC at present is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management systems, and in particular to a method and device for determining the remaining charging time, and a non-volatile storage medium. Background Art

[0002] Currently, there are two main solutions for calculating the remaining charging time in the industry:

[0003] 1. Based on the battery pack's estimated SOC, the remaining charge is calculated in real time. The remaining charge and the actual charging current are used to calculate the required charging time. This type of solution often relies on the accuracy of the SOC estimation, and inaccurate SOC estimation can lead to inaccurate remaining time estimation.

[0004] 2. Estimating the remaining time based on dynamic voltage. In practice, this can be done by calibrating charging data. By charging at different cell voltages to the full-charge cutoff voltage, the actual charging time can be recorded. This database of dynamic voltage and remaining charge time can be created. In practice, the recorded remaining charge time can be retrieved by looking up the table. This approach improves accuracy based on actual data, but the accuracy of the data will gradually decrease with aging.

[0005] To address the above-mentioned problems, no effective solutions have been proposed so far. Summary of the Invention

[0006] Embodiments of the present invention provide a method, device, and non-volatile storage medium for determining the remaining charging time, to at least solve the technical problem that the current estimation of the remaining charging time based on the estimated SOC results in inaccurate estimation results.

[0007] According to one aspect of an embodiment of the present invention, a method for determining a remaining charging time is provided, comprising: obtaining a battery temperature of a target vehicle in a charging state; determining a target charging stage corresponding to the target vehicle based on the battery temperature; determining an initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage; obtaining correction coefficients corresponding to each of a plurality of charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the plurality of charging stages are determined based on a historical charging condition of the target vehicle; and determining a target remaining charging time of the target vehicle based on the correction coefficients corresponding to each of the plurality of charging stages and the initial remaining charging time.

[0008] Optionally, the multiple charging stages include a pure heating stage, a heating while charging stage, and a charging-only stage, wherein the pure heating stage is a stage in which the battery temperature does not exceed a first preset threshold, the heating while charging stage is a stage in which the battery temperature is between the first preset threshold and a second preset threshold, and the charging-only stage is a stage in which the battery temperature is not lower than the second preset threshold.

[0009] Optionally, based on the battery temperature and the target charging stage, the initial remaining charging time of the target vehicle is determined, including: when the target charging stage is a pure heating stage, based on the preset correspondence between the pure heating stage temperature and the remaining charging time, determining a first remaining charging time corresponding to the battery temperature; obtaining the battery voltage corresponding to the target vehicle; based on the battery voltage, determining the remaining charging time corresponding to the charging while heating stage and the charging only stage respectively; determining the initial remaining charging time based on the first remaining charging time and the remaining charging time corresponding to the charging while heating stage and the charging only stage respectively.

[0010] Optionally, based on the battery temperature and the target charging stage, the initial remaining charging time of the target vehicle is determined, including: when the target charging stage is the charging and heating stage, obtaining the battery voltage corresponding to the target vehicle; based on the correspondence between the temperature, voltage and the remaining charging time corresponding to the charging and heating stage, determining the second remaining charging time corresponding to the charging and heating stage according to the battery voltage and battery temperature; based on the battery voltage, determining the remaining charging time corresponding to the charging-only stage; and determining the initial remaining charging time based on the second remaining charging time and the remaining charging time corresponding to the charging-only stage.

[0011] Optionally, based on the battery temperature and the target charging stage, the initial remaining charging time of the target vehicle is determined, including: when the target charging stage is the charging-only stage, obtaining the battery voltage corresponding to the target vehicle; based on the correspondence between the voltage corresponding to the charging-only stage and the remaining charging time, determining the third remaining charging time corresponding to the charging-only stage according to the battery voltage; and determining the initial remaining charging time based on the third remaining charging time.

[0012] Optionally, correction coefficients corresponding to multiple charging stages corresponding to the target vehicle are obtained, wherein the correction coefficients corresponding to the multiple charging stages are determined based on the historical charging conditions of the target vehicle, including: obtaining historical charging data corresponding to the target vehicle, wherein the historical charging data include estimated charging times and actual charging times corresponding to multiple pure heating stages, estimated charging times and actual charging times corresponding to multiple charging-while-heating stages, and estimated charging times and actual charging times corresponding to multiple charging-only stages; determining the correction coefficient corresponding to the pure heating stage based on the estimated charging times and actual charging times corresponding to the multiple pure heating stages; determining the correction coefficient corresponding to the charging-while-heating stage based on the estimated charging times and actual charging times corresponding to the multiple charging-while-heating stages; determining the correction coefficient corresponding to the charging-only stage based on the estimated charging times and actual charging times corresponding to the multiple charging-only stages.

[0013] According to another aspect of an embodiment of the present invention, a device for determining the remaining charging time is also provided, including: a first acquisition module for acquiring the battery temperature of a target vehicle in a charging state; a first determination module for determining the target charging stage corresponding to the target vehicle based on the battery temperature; a second determination module for determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage; a second acquisition module for acquiring correction coefficients corresponding to each of the multiple charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the multiple charging stages are determined based on the historical charging conditions of the target vehicle; and a third determination module for determining the target remaining charging time of the target vehicle based on the correction coefficients corresponding to each of the multiple charging stages and the initial remaining charging time.

[0014] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is further provided, the non-volatile storage medium including a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any of the above-mentioned methods for determining the remaining charging time.

[0015] According to another aspect of an embodiment of the present invention, a computer device is provided. The computer device includes a processor, and the processor is used to run a program. When the program is run, any one of the above-mentioned methods for determining the remaining charging time is executed.

[0016] According to yet another aspect of an embodiment of the present invention, a computer program product is provided, including a computer program, which implements any of the above-mentioned methods for determining the remaining charging time when executed by a processor.

[0017] In an embodiment of the present invention, a method for determining the remaining charging time is adopted, by obtaining the battery temperature of a target vehicle in a charging state; determining the target charging stage corresponding to the target vehicle based on the battery temperature; determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage; obtaining correction coefficients corresponding to each of the multiple charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the multiple charging stages are determined based on the historical charging conditions of the target vehicle; determining the target remaining charging time of the target vehicle based on the correction coefficients corresponding to each of the multiple charging stages and the initial remaining charging time, thereby achieving the purpose of correcting the estimated remaining charging time, thereby realizing the technical effect of improving the accuracy of the remaining charging time, and further solving the technical problem that the current estimation of the remaining charging time based on the estimated SOC leads to inaccurate estimation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A hardware structure block diagram of a computer terminal for implementing a method for determining the remaining charging time is shown;

[0020] Figure 2 is a flow chart of a method for determining the remaining charging time according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of a method for determining the remaining charging time provided according to an optional embodiment of the present invention;

[0022] Figure 4 4 is a structural block diagram of a device for determining the remaining charging time provided in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] According to an embodiment of the present invention, a method embodiment of a method for determining the remaining charging time is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0026] The method embodiment provided in the first embodiment of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Figure 1FIG1 shows a hardware structure block diagram of a computer terminal for implementing a method for determining the remaining charging time. Figure 1 As shown, the computer terminal 10 may include one or more (illustrated as 102a, 102b, ..., 102n in the figure) processors (the processor may include but is not limited to a microprocessor MCU or a programmable logic device FPGA and other processing devices), a memory 104 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It will be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 1 More or fewer components than shown, or with Figure 1 Different configurations shown.

[0027] It should be noted that the one or more processors and / or other data processing circuits described above may generally be referred to herein as "data processing circuitry." The data processing circuitry may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuitry may be a single, independent processing module, or may be incorporated in whole or in part into any of the other components of the computer terminal 10. As described in the embodiments of the present application, the data processing circuitry serves as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0028] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the method for determining the remaining charging time in the embodiment of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, implementing the method for determining the remaining charging time of the above-mentioned application. The memory 104 may include a high-speed random access memory and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely located relative to the processor, and these remote memories may be connected to the computer terminal 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0029] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the computer terminal 10 .

[0030] Figure 2FIG. 1 is a flow chart of a method for determining the remaining charging time according to an embodiment of the present invention. Figure 2 As shown, the method includes the following steps:

[0031] Step S202 , obtaining the battery temperature of the target vehicle in a charging state.

[0032] In this step, with the popularity of electric vehicles, consumers are paying more and more attention to the accurate prediction of charging time. The target vehicle in this step can be an electric vehicle. During the charging process, the battery will generate heat, so it is possible to consider estimating the remaining charging time based on the battery temperature. For example, by setting temperature sensors inside the battery pack of the target vehicle, the temperature of each key part of the battery pack can be monitored, wherein the temperature sensors can be distributed in different areas of the battery pack, including the center and edge of the battery module, and near the inlet and outlet of the thermal management system to obtain comprehensive temperature information. During the charging of the vehicle, data from all temperature sensors can be continuously collected, usually at a certain sampling frequency, such as once per second, to ensure that any temperature changes can be captured in time, so as to obtain accurate battery temperature.

[0033] Step S204: determining a target charging stage corresponding to the target vehicle based on the battery temperature.

[0034] In this step, because battery performance is significantly affected by temperature, the battery charging speed may vary across different temperature ranges. Therefore, the entire vehicle charging process can be divided into multiple charging stages based on battery temperature. Different remaining charging time estimation methods can be used in different charging stages to improve estimation accuracy.

[0035] Therefore, determining the target charging stage corresponding to the target vehicle based on the battery temperature can provide a basis for subsequently estimating the remaining charging time.

[0036] Step S206 : determining the remaining time for initial charging of the target vehicle based on the battery temperature and the target charging stage.

[0037] In this step, the remaining charging time corresponding to the target charging stage can be determined based on the battery temperature. If the target charging stage is not the last charging stage, the remaining charging time corresponding to the remaining charging stage can be determined based on the battery voltage, thereby determining the initial remaining charging time of the target vehicle.

[0038] Based on the currently determined target charging stage, a pre-set charging time data table can be searched for entries matching the current battery temperature. This pre-set charging time data table can be based on data obtained through a series of experiments during the experimental phase. For example, in a laboratory setting, battery samples at different initial temperatures can be charged, and relevant data for each battery sample at different charging stages can be recorded. For example, during the pure heating stage, the time required to heat from each temperature to the set charging start temperature can be recorded; during the charging-while-heating stage, the charging time at different temperatures and dynamic voltage ranges can be recorded; and during the room temperature or moderate temperature stage (i.e., the charging-only stage), the charging time at different voltages can be recorded until the battery is fully charged. The experimental data can then be organized into tables, with each table corresponding to a charging stage, listing the relationship between temperature, voltage, and remaining charging time at each stage. Typically, the voltage during the pure heating stage is fixed, so only the relationship between temperature and remaining charging time is considered. Statistical methods can be used to analyze data trends to ensure consistency and rationality, and to exclude outliers or atypical data points. The remaining time can be determined based on temperature and stage through table lookup. For temperature or voltage points that are not directly measured, interpolation methods (such as linear interpolation, polynomial interpolation or spline interpolation) are used to estimate the remaining charging time at these points.

[0039] Step S208 : obtaining correction coefficients corresponding to the plurality of charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to the plurality of charging stages are determined based on a historical charging condition of the target vehicle.

[0040] In this step, in reality, batteries age over time, and their electrochemical properties change, directly impacting charging efficiency and energy storage capacity. Therefore, a correction factor can be set to adapt to performance changes brought about by battery aging and influencing factors in real-world situations, thereby improving the accuracy of the estimated results. The correction factor can be based on historical charging conditions, obtaining historical charging data. Using this historical charging data, initial numerical corrections are made using a sliding window approach. This relies on recent charging data while discarding charging data from a longer period of time. This enables the battery management system to more accurately and quickly adapt to the current state of the battery and environmental changes, improving the personalization and accuracy of the predictions.

[0041] Step S210 : determining a target remaining charging time for the target vehicle based on the correction coefficients corresponding to the multiple charging stages and the initial remaining charging time.

[0042] In this step, the correction coefficient obtained through the above steps and the initial remaining charging time of each charging stage are applied to the charging process of the target vehicle, and the initial remaining charging time of different charging stages are adjusted respectively. Among them, the correction coefficient plays a role of correction and compensation, making the prediction closer to reality. By adding the corrected remaining charging time of different stages, the target remaining charging time of the target vehicle can be obtained. This time takes into account the influence of all stages and improves the accuracy and reliability of the overall prediction through a continuous correction process. This enables the prediction model to maintain a high prediction accuracy under different working conditions. Through refined stage division and targeted correction, accurate prediction of charging time can be ensured even in harsh environments.

[0043] Specifically, for the pure heating stage, T11 = T1*λ1, where T1 is the initial remaining charging time for pure heating; in the charging and heating stage, T22 = T2*λ2, where T2 represents the initial remaining charging time for the charging and heating stage; for the charging-only stage, T33 = T3*λ3, where T3 is the initial remaining charging time for the charging-only stage. The corrected remaining charging time for each stage is added together to obtain the target remaining charging time T for the target vehicle.

[0044] T=λ1*T1+λ2*T2+λ3*T3

[0045] Among them, T1, T2 and T3 are the initial remaining charging time of pure heating, heating while charging and charging only found from the database; λ1, λ2 and λ3 are the correction coefficients of pure heating, heating while charging and charging only stages, which are used to compensate for the deviation in the estimation; T11, T22, T33 are the corrected remaining charging time of pure heating, heating while charging and charging only stages respectively.

[0046] Through the above steps, the purpose of correcting the estimated remaining charging time can be achieved, thereby realizing the technical effect of improving the accuracy of the remaining charging time, and further solving the technical problem of inaccurate estimation results caused by estimating the remaining charging time based on the estimated SOC.

[0047] As an optional embodiment, the multiple charging stages include a pure heating stage, a charging and heating stage, and a charging-only stage, wherein the pure heating stage is a stage in which the battery temperature does not exceed a first preset threshold value, the charging and heating stage is a stage in which the battery temperature is between the first preset threshold value and the second preset threshold value, and the charging-only stage is a stage in which the battery temperature is not lower than the second preset threshold value.

[0048] Optionally, different temperature thresholds can be set to define different charging phases, where these thresholds are based on the optimal operating temperature range and thermal management design of the battery pack. When switching between different heating phases, the real-time temperature sensor reading is compared with preset temperature thresholds. When the current temperature is below the first preset threshold, the current phase is determined to be a pure heating phase. When the current temperature reaches or exceeds the first preset threshold but is less than the second preset threshold, the current phase is determined to have transitioned from a pure heating phase to a heating-while-charging phase. Once the temperature exceeds the second preset threshold, the vehicle is determined to have entered a charging-only phase, and heating is stopped to focus on the charging process.

[0049] For example, when the battery temperature is below -15°C, the system determines that the vehicle is in the pure heating phase and begins heating the battery. When the battery temperature reaches -15°C, i.e., the first preset threshold, the system begins considering entering the charging-and-heating phase. The charging-only start temperature, i.e., the second preset threshold, is 15°C. The charging-only phase begins when the battery temperature reaches the second preset threshold, and subsequent temperatures must not fall below the second preset threshold. If the current temperature is below -15°C, the system determines that the target vehicle is in the pure heating phase. When the temperature reaches the first preset threshold but does not reach the second preset threshold, the system determines that the target vehicle is in the charging-and-heating phase. Once the battery temperature exceeds the second preset threshold and does not drop below the second preset threshold, the system determines that the vehicle has entered the charging-only phase.

[0050] The pure heating stage refers to when the battery temperature is lower than the first preset threshold set by the system (for example, -15°C), the heating function will be activated first to raise the battery temperature to a level more suitable for charging. During this stage, the battery will not be charged and all energy is used for heating. By monitoring the reading of the temperature sensor, once the temperature falls below the first preset threshold, the heating cycle will be activated until the temperature rises to the first preset threshold temperature point, which is usually the starting temperature of the charging and heating stage. Through heating, the battery temperature is ensured to reach or approach the first preset threshold, thereby creating more optimal conditions for the charging process and avoiding the negative impact of low temperature on battery performance.

[0051] The vehicle enters the charging and heating phase when the battery temperature reaches the first preset threshold but has not yet reached the second preset threshold (for example, the temperature rises from -15°C to 15°C). During this phase, charging and heating are performed simultaneously to prevent the battery temperature from dropping too low during charging, which would affect charging efficiency and battery life. By monitoring battery temperature and voltage and adjusting the power distribution between heating and charging, the battery temperature is ensured to gradually rise to the second preset threshold. Balancing charging and heating ensures that the battery temperature reaches the appropriate charging range while minimizing charging time.

[0052] During the charge-only phase, when the battery temperature reaches or exceeds a second preset threshold (e.g., 15°C), heating stops and the vehicle enters the charge-only phase. At this point, the battery temperature is sufficient to ensure charging efficiency and safety, and the charging process is no longer restricted by temperature. During the charge-only phase, all energy is focused on the charging process, with heating discontinued until the battery is fully charged, maximizing the charging rate. Battery temperature is also monitored to ensure overheating and maintain charging safety.

[0053] Optionally, during charging, if the battery temperature suddenly drops below a first preset threshold, the system may need to re-enter the pure heating phase. This multi-stage charging management strategy enables more precise control of the charging process, ensuring accurate and reliable predictions of remaining charging time in different temperature environments, while protecting the battery from extreme temperature fluctuations, extending battery life, and improving charging efficiency.

[0054] As an optional embodiment, the initial remaining charging time of the target vehicle is determined based on the battery temperature and the target charging stage, including: when the target charging stage is a pure heating stage, based on the preset correspondence between the pure heating stage temperature and the remaining charging time, determining the first remaining charging time corresponding to the battery temperature; obtaining the battery voltage corresponding to the target vehicle; based on the battery voltage, determining the remaining charging time corresponding to the charging while heating stage and the charging only stage respectively; determining the initial remaining charging time based on the first remaining charging time and the remaining charging time corresponding to the charging while heating stage and the charging only stage respectively.

[0055] As an optional embodiment, the initial remaining charging time of the target vehicle is determined based on the battery temperature and the target charging stage, including: when the target charging stage is the charging and heating stage, obtaining the battery voltage corresponding to the target vehicle; based on the correspondence between the temperature, voltage and the remaining charging time corresponding to the charging and heating stage, determining the second remaining charging time corresponding to the charging and heating stage according to the battery voltage and battery temperature; determining the remaining charging time corresponding to the charging-only stage based on the battery voltage; and determining the initial remaining charging time based on the second remaining charging time and the remaining charging time corresponding to the charging-only stage.

[0056] As an optional embodiment, the initial remaining charging time of the target vehicle is determined based on the battery temperature and the target charging stage, including: when the target charging stage is the charging-only stage, obtaining the battery voltage corresponding to the target vehicle; based on the correspondence between the voltage corresponding to the charging-only stage and the remaining charging time, determining the third remaining charging time corresponding to the charging-only stage according to the battery voltage; and determining the initial remaining charging time based on the third remaining charging time.

[0057] Optionally, when the target charging stage is the pure heating stage, it can be understood that it is in the first stage of charging. Therefore, in addition to predicting the remaining charging time corresponding to the target charging stage, the remaining charging time of the next two charging stages must also be predicted. The battery temperature is obtained in real time through the sensor to determine the current battery temperature and obtain the voltage of the pure heating stage. Since charging has not yet started in the pure heating stage, the battery voltage should remain unchanged. According to the current battery temperature, refer to the preset correspondence table of pure heating stage temperature and remaining charging time (Table 1), find the row closest to the current temperature, and read out the corresponding first remaining charging time (T1). For example, if the current battery temperature is -27℃, query Table 1 to find the corresponding pure heating remaining time of -30℃ and -25℃ respectively. Since -27℃ is between -30℃ and -25℃, the remaining charging time corresponding to -27℃ can be an interpolation of the two values ​​of T1(1) and T2(2). Then, according to the voltage obtained in the pure heating stage, the remaining charging time in the charging and heating stage and the charging-only stage are obtained as T2 and T3 respectively. From this, the initial remaining charging time Ti can be obtained as:

[0058] Ti=T1(2)+T2+T3

[0059] Among them, T1(2) is the remaining time of pure heating during charging; T2 is the remaining time of heating while charging; T3 is the remaining time of charging only.

[0060]

[0061] Table 1 Remaining time of pure heating for charging

[0062] Optionally, when the target charging stage is charging while heating, it can be understood that it is in the second stage of charging. Therefore, in addition to predicting the remaining charging time corresponding to the target charging stage, the remaining charging time of the next charging stage must also be predicted. By obtaining the current temperature and reading the current voltage state of the battery pack, this voltage value will be used to estimate the remaining charging time of this stage and the next stage (charging while heating and charging only stage). Based on the obtained battery voltage and current temperature, query the charging remaining time table of the charging while heating stage (Table 2 to Table 4), find the most matching row, and read the corresponding charging remaining time (T2). For example, when the temperature is -5℃ and the voltage is V13mV, the corresponding charging while heating remaining time is T2_1(3); based on the current voltage, the remaining time of the charging only stage is determined to be T3, and the initial charging time Ti can be obtained as:

[0063] Ti=T2_1(3)+T3

[0064] Among them, T2_1(3): the remaining time of charging and heating; T3: the remaining time of charging only.

[0065]

[0066] Table 2 Charging dynamic voltage interval 1 heating remaining time

[0067]

[0068] Table 3 Charging dynamic voltage interval 2 heating remaining time

[0069]

[0070] Table 4 Charging dynamic voltage interval n Remaining heating time

[0071] Optionally, when the target charging stage is charging only, it can be understood that it is in the third stage of charging, or it can be understood as the final stage of battery charging. Therefore, the predicted remaining charging time corresponding to the target charging stage is equivalent to the initial charging time. Based on the obtained battery voltage, the charging time table for the charging only stage (Table 5) is searched to obtain the corresponding remaining charging time. For example, when the voltage value is Vc3, the third remaining charging time (T3) is T3(3), which can be understood as the initial remaining charging time (Ti) is also T3(3):

[0072] Ti=T3

[0073] Among them, T3: remaining charging time only.

[0074]

[0075] Table 5 Remaining time of charging phase only

[0076] Optionally, the voltage points in the above table are selected for example only, and actual applications can be increased based on actual data. By carrying out a charging experiment at room temperature, the charging voltage change and the charging remaining time change curve are recorded. Since too many voltage samples will increase the complexity of the calculation, the voltage points in the experiment are selected as jump voltages, plateau boundary voltage points, and end calibration points as much as possible, which can improve the accuracy of the change curve when the sample size is not too complex. When performing a data extraction test for the remaining charging time, it is necessary to have different voltage change characteristics with temperature at different starting voltages at the same temperature. Taking into account the platform characteristics and the charging MAP interval, the voltage is divided into different intervals for testing. The voltage within the interval can be interpolated according to the interval test data to estimate the remaining time of initial charging heating. Optionally, linear interpolation is only an interpolation method introduced in this scheme, and other interpolation methods should also be included in the present invention.

[0077] As an optional embodiment, correction coefficients corresponding to multiple charging stages corresponding to the target vehicle are obtained, wherein the correction coefficients corresponding to the multiple charging stages are determined based on the historical charging conditions of the target vehicle, including: obtaining historical charging data corresponding to the target vehicle, wherein the historical charging data include estimated charging times and actual charging times corresponding to multiple pure heating stages, estimated charging times and actual charging times corresponding to multiple charging-while-heating stages, and estimated charging times and actual charging times corresponding to multiple charging-only stages; determining the correction coefficient corresponding to the pure heating stage based on the estimated charging times and actual charging times corresponding to the multiple pure heating stages; determining the correction coefficient corresponding to the charging-while-heating stage based on the estimated charging times and actual charging times corresponding to the multiple charging-while-heating stages; determining the correction coefficient corresponding to the charging-only stage based on the estimated charging times and actual charging times corresponding to the multiple charging-only stages.

[0078] Optionally, the multiple charging stages in the charging process correspond to respective correction coefficients. Since the initial remaining time estimated by the lookup table method may have certain deviations in actual use, a correction coefficient is introduced to determine the remaining charging time based on the correction coefficient, mainly to improve the accuracy of the prediction.

[0079] The correction coefficient is usually learned from historical data and reflects the difference between the actual charging process and the theoretical model. This difference may come from multiple factors, including battery aging, changes in environmental conditions, performance fluctuations of charging equipment, and user habits. The correction coefficient can correct systematic deviations that may occur during model prediction. For example, if the model always predicts that the remaining charging time is shorter than the actual time, the correction coefficient will tend to adjust the prediction result to make it closer to the actual situation. The correction coefficient can integrate historical charging data to make the prediction result closer to the actual working conditions, thereby improving the accuracy of the prediction of the remaining charging time. Optionally, for the pure heating stage, the estimated charging time and actual charging time corresponding to A pure heating stages are obtained, and the pure heating correction coefficient λ1 is introduced. The actual charging time of each time is compared with the estimated charging time, and the average value is finally calculated to obtain the correction coefficient. It can also be understood as calculating the correction coefficient through a sliding window.

[0080]

[0081] Among them, T1p[i] is the estimated remaining time of pure heating charging for the i-th time, and T1r[i] is the actual remaining time of pure heating charging for the i-th time.

[0082] Optionally, for the charging and heating stage, obtain the estimated charging time and actual charging time corresponding to B charging and heating stages, introduce the charging and heating correction coefficient λ2, compare the actual charging time with the estimated charging time each time, and finally calculate the average value to obtain the correction coefficient. This can also be understood as calculating the correction coefficient through a sliding window.

[0083]

[0084] Among them, T2p[i] is the i-th estimated remaining charging time for charging and heating, and T2r[i] is the i-th actual remaining charging time for charging and heating.

[0085] Optionally, for the charging-only stage, the estimated charging time and actual charging time corresponding to C charging-only stages are obtained, and a charging-only correction coefficient λ3 is introduced. The actual charging time of each time is compared with the estimated charging time, and the average value is finally calculated to obtain the correction coefficient. This can also be understood as calculating the correction coefficient through a sliding window.

[0086]

[0087] Wherein, Tcp[i] is the estimated remaining charging time of the i-th charging-only phase, and Tcr[i] is the remaining charging time of the i-th actual charging-only phase.

[0088] As an optional embodiment, Figure 3 is a schematic diagram of a method for determining the remaining charging time according to an optional embodiment of the present invention. Figure 3 As shown, the method includes the following steps: Step S1, extracting test data from sample battery packs: During the pure heating phase, the time required to heat to the pure heating cutoff temperature at different temperatures is obtained; during the charging-while-heating phase, data on the remaining charging time and cell voltage variation with temperature are obtained within different voltage ranges; during the charging-only phase, data on the voltage-remaining charging time are obtained. Step S2, based on historical data, self-learning factors for the three phases of historical operating condition data are calculated to obtain the pure heating self-learning factor λ1, the charging-while-heating self-learning factor λ2, and the charging-only self-learning factor λ3. Step S3, based on pre-programmed data in the software, the remaining heating-only time T1, the remaining charging-while-heating time T2, and the remaining charging-only time T3 are obtained for estimating the remaining charging time, thereby obtaining the target remaining charging time.

[0089] T=λ1*T1+λ2*T2+λ3*T3

[0090] Optionally, first, under laboratory conditions, set a series of temperature points as the starting temperature for the test, such as -30°C, -25°C, and -20°C, until approaching the cutoff temperature of the pure heating phase, such as -15°C. Using a standard heating pattern, starting at each selected starting temperature, record the heating time required until the battery pack temperature stabilizes at the cutoff temperature of the pure heating phase. This process should be repeated multiple times to cover different combinations of starting temperatures and battery states. The collected heating time data is categorized by starting temperature, and a temperature-pure heating remaining time relationship table is constructed to form a preliminary database. Data extraction during the charging and heating phase: Several key voltage ranges for the battery during the charging and heating phase are identified. These ranges should be based on battery type (e.g., lithium iron phosphate or ternary) and charging characteristics. The battery is charged at different temperatures, and the actual remaining charge time corresponding to each voltage range is recorded. This process should be performed between the starting temperature (e.g., -15°C) and the cutoff temperature (e.g., 15°C) of the charging and heating phase. The collected data is organized into a three-dimensional relationship of temperature-voltage-remaining time to form a database of the remaining charging time in the charging and heating stage. For voltage and temperature combinations that are not directly tested, interpolation methods (such as linear interpolation or high-order interpolation) are used to estimate the remaining charging time to improve the comprehensiveness and practicality of the data. Data extraction for the charging-only stage: Within the temperature range where heating is not required (for example, 15°C to the normal operating temperature of the battery pack), the process of charging the battery from different voltage levels to a fully charged state is recorded, the test data is organized, the corresponding relationship between voltage and remaining charging time is established, and a database of the remaining charging time in the charging-only stage is constructed. Considering that the battery may enter the charging-only stage at a higher starting voltage, or even directly reach a fully charged state during the charging and heating process, ensure that the database contains data for such special cases.

[0091] Secondly, a self-learning factor is calculated based on historical data. The self-learning factor is the correction coefficient mentioned above. The calculation of the self-learning factors (λ1, λ2, λ3) is to continuously optimize the prediction of the remaining charging time to make it closer to reality. The historical data involved here refers to the actual charging time and the estimated charging time during several past charging processes. The deviation between the actual data and the estimated data during the pure heating phase of the most recent A charging processes is extracted. The difference between the actual pure heating time and the estimated pure heating time is calculated and the deviation trend is analyzed. Using a sliding window algorithm, the value of λ1 is adjusted based on the deviation of the historical data of the most recent A times to make it more accurate. The actual charging time and estimated data of the most recent B charging and heating phases are collected. The difference between the actual charging time and the estimated time is analyzed, especially the changes in different voltage ranges and temperature points. Based on the size and trend of the deviation, the sliding window algorithm is used to update λ2 to reduce the error of future predictions. The actual charging durations of the most recent C charge-only phases are collated and compared with the durations predicted based on the voltage-remaining duration relationship. The difference between the actual remaining duration and the estimated duration for each charge is calculated, and the error distribution is analyzed. Using a sliding window algorithm, the value of λ3 is dynamically adjusted based on the error data from C charges to more accurately reflect the characteristics of the charge-only phase.

[0092] Finally, the current operating condition data is obtained, and the current battery temperature and voltage status are read in real time. Based on the temperature, the vehicle is determined to be in the pure heating phase, the charging and heating phase, or the charging-only phase. In the pure heating phase, based on the current battery temperature, a preset temperature-pure heating remaining time relationship table is queried to obtain the pure heating remaining time T1. In the charging-and-heating phase, based on the current battery voltage and temperature, a database is searched to obtain the charging-and-heating remaining time T2. In the charging-only phase, based on the battery voltage, the charging-only remaining time T3 is found from the voltage-remaining time relationship database. T1, T2, and T3 are multiplied by their respective self-learning factors λ1, λ2, and λ3 to correct the predicted values ​​to more closely reflect the actual charging conditions. The corrected remaining charging times for each phase are summed to obtain the comprehensive remaining charging time prediction for the target vehicle.

[0093] It should be noted that for the aforementioned method embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0094] Through the description of the above embodiments, those skilled in the art can clearly understand that the method for detecting the driving state of a vehicle according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, or of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0095] According to an embodiment of the present invention, a device for determining the remaining charging time for implementing the above-mentioned method for determining the remaining charging time is also provided. Figure 4 FIG. 1 is a structural block diagram of a device for determining the remaining charging time according to an embodiment of the present invention. Figure 4 As shown, the device for determining the remaining charging time includes: a first acquisition module 402, a first determination module 404, a second determination module 406, a second acquisition module 408 and a third determination module 410. The device for determining the remaining charging time is described below.

[0096] The first acquisition module 402 is configured to acquire the battery temperature of the target vehicle in a charging state.

[0097] The first determining module 404 is connected to the first acquiring module 402 and is configured to determine a target charging stage corresponding to the target vehicle based on the battery temperature.

[0098] The second determining module 406 is connected to the first determining module 404 and is configured to determine the remaining time of the initial charging of the target vehicle based on the battery temperature and the target charging stage.

[0099] The second acquisition module 408 and the second determination module 406 are configured to acquire correction coefficients corresponding to the plurality of charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to the plurality of charging stages are determined based on the historical charging status of the target vehicle.

[0100] The third determining module 410 and the second obtaining module 408 are configured to determine a target remaining charging time for the target vehicle based on the correction coefficients corresponding to the multiple charging stages and the initial remaining charging time.

[0101] It should be noted that the first acquisition module 402, first determination module 404, second determination module 406, second acquisition module 408, and third determination module 410 described above correspond to steps S202 to S210 in the embodiment. The examples and application scenarios implemented by the various modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiment. It should be noted that the above modules, as part of the device, can be run in the computer terminal 10 provided in the embodiment.

[0102] An embodiment of the present invention may provide a computer device. Optionally, in this embodiment, the computer device may be located in at least one of a plurality of network devices in a computer network. The computer device includes a memory and a processor.

[0103] The memory can be used to store software programs and modules, such as the program instructions / modules corresponding to the method and device for determining the remaining charging time in the embodiments of the present invention. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory, thereby implementing the above-mentioned method for determining the remaining charging time. The memory may include a high-speed random access memory and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory may further include a memory remotely located relative to the processor, and these remote memories may be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0104] The processor can call the information and application stored in the memory through the transmission device to perform the following steps: obtain the battery temperature of the target vehicle in the charging state; determine the target charging stage corresponding to the target vehicle based on the battery temperature; determine the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage; obtain the correction coefficients corresponding to each of the multiple charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the multiple charging stages are determined based on the historical charging status of the target vehicle; determine the target remaining charging time of the target vehicle based on the correction coefficients corresponding to each of the multiple charging stages and the initial remaining charging time.

[0105] Optionally, the processor may also execute the program code of the following steps, wherein the multiple charging stages include a pure heating stage, a heating while charging stage, and a charging-only stage, wherein the pure heating stage is a stage in which the battery temperature does not exceed a first preset threshold value, the heating while charging stage is a stage in which the battery temperature is between a first preset threshold value and a second preset threshold value, and the charging-only stage is a stage in which the battery temperature is not lower than a second preset threshold value.

[0106] Optionally, the processor may also execute the program code of the following steps: determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage, including: when the target charging stage is a pure heating stage, determining the first remaining charging time corresponding to the battery temperature based on the preset correspondence between the pure heating stage temperature and the remaining charging time; obtaining the battery voltage corresponding to the target vehicle; determining the respective remaining charging times corresponding to the charging while heating stage and the charging only stage based on the battery voltage; determining the initial remaining charging time based on the first remaining charging time and the respective remaining charging times corresponding to the charging while heating stage and the charging only stage.

[0107] Optionally, the processor may also execute the program code of the following steps: determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage, including: when the target charging stage is the charging and heating stage, obtaining the battery voltage corresponding to the target vehicle; determining the second remaining charging time corresponding to the charging and heating stage based on the correspondence between the temperature, voltage and the remaining charging time corresponding to the charging and heating stage according to the battery voltage and battery temperature; determining the remaining charging time corresponding to the charging-only stage based on the battery voltage; determining the initial remaining charging time based on the second remaining charging time and the remaining charging time corresponding to the charging-only stage.

[0108] Optionally, the processor may also execute the program code of the following steps: determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage, including: when the target charging stage is the charging-only stage, obtaining the battery voltage corresponding to the target vehicle; determining the third remaining charging time corresponding to the charging-only stage according to the battery voltage based on the correspondence between the voltage corresponding to the charging-only stage and the remaining charging time; and determining the initial remaining charging time based on the third remaining charging time.

[0109] Optionally, the processor may also execute the program code of the following steps: obtaining correction coefficients corresponding to each of the multiple charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the multiple charging stages are determined based on the historical charging conditions of the target vehicle, including: obtaining historical charging data corresponding to the target vehicle, wherein the historical charging data include estimated charging times and actual charging times corresponding to multiple pure heating stages, estimated charging times and actual charging times corresponding to multiple charging-while-heating stages, and estimated charging times and actual charging times corresponding to multiple charging-only stages; determining the correction coefficient corresponding to the pure heating stage based on the estimated charging times and actual charging times corresponding to multiple pure heating stages; determining the correction coefficient corresponding to the charging-while-heating stage based on the estimated charging times and actual charging times corresponding to multiple charging-while-heating stages; determining the correction coefficient corresponding to the charging-only stage based on the estimated charging times and actual charging times corresponding to multiple charging-only stages.

[0110] An embodiment of the present invention provides a method for determining the remaining charging time, which comprises obtaining the battery temperature of a target vehicle in a charging state; determining a target charging stage corresponding to the target vehicle based on the battery temperature; determining an initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage; obtaining correction coefficients corresponding to each of the multiple charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the multiple charging stages are determined based on the historical charging conditions of the target vehicle; and determining the target remaining charging time of the target vehicle based on the correction coefficients corresponding to each of the multiple charging stages and the initial remaining charging time, thereby achieving the purpose of correcting the estimated remaining charging time, thereby realizing the technical effect of improving the accuracy of the remaining charging time, and further solving the technical problem that the current estimation of the remaining charging time based on the estimated SOC leads to inaccurate estimation results.

[0111] A person skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a non-volatile storage medium, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0112] The embodiment of the present invention further provides a non-volatile storage medium. Optionally, in this embodiment, the non-volatile storage medium can be used to store the program code executed by the method for determining the remaining charging time provided in the embodiment.

[0113] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group.

[0114] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: obtaining the battery temperature of the target vehicle in a charging state; determining the target charging stage corresponding to the target vehicle based on the battery temperature; determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage; obtaining correction coefficients corresponding to each of the multiple charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the multiple charging stages are determined based on the historical charging conditions of the target vehicle; and determining the target remaining charging time of the target vehicle based on the correction coefficients corresponding to each of the multiple charging stages and the initial remaining charging time.

[0115] Optionally, in this embodiment, the multiple charging stages include a pure heating stage, a heating while charging stage, and a charging-only stage, wherein the pure heating stage is a stage in which the battery temperature does not exceed a first preset threshold value, the heating while charging stage is a stage in which the battery temperature is between the first preset threshold value and the second preset threshold value, and the charging-only stage is a stage in which the battery temperature is not lower than the second preset threshold value.

[0116] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage, including: when the target charging stage is a pure heating stage, determining a first remaining charging time corresponding to the battery temperature based on a preset correspondence between the pure heating stage temperature and the remaining charging time; obtaining the battery voltage corresponding to the target vehicle; determining the remaining charging time corresponding to the charging while heating stage and the charging only stage respectively based on the battery voltage; determining the initial remaining charging time based on the first remaining charging time and the remaining charging time corresponding to the charging while heating stage and the charging only stage respectively.

[0117] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage, including: when the target charging stage is the charging and heating stage, obtaining the battery voltage corresponding to the target vehicle; based on the correspondence between the temperature, voltage and the remaining charging time corresponding to the charging and heating stage, determining the second remaining charging time corresponding to the charging and heating stage according to the battery voltage and battery temperature; determining the remaining charging time corresponding to the charging-only stage based on the battery voltage; and determining the initial remaining charging time based on the second remaining charging time and the remaining charging time corresponding to the charging-only stage.

[0118] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: determining the initial remaining charging time of the target vehicle based on the battery temperature and the target charging stage, including: when the target charging stage is a charging-only stage, obtaining the battery voltage corresponding to the target vehicle; based on the correspondence between the voltage corresponding to the charging-only stage and the remaining charging time, determining the third remaining charging time corresponding to the charging-only stage according to the battery voltage; and determining the initial remaining charging time based on the third remaining charging time.

[0119] Optionally, in this embodiment, the non-volatile storage medium is configured to store program code for executing the following steps: obtaining correction coefficients corresponding to multiple charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to the multiple charging stages are determined based on the historical charging conditions of the target vehicle, including: obtaining historical charging data corresponding to the target vehicle, wherein the historical charging data includes estimated charging times and actual charging times corresponding to multiple pure heating stages, estimated charging times and actual charging times corresponding to multiple charging-while-heating stages, and estimated charging times and actual charging times corresponding to multiple charging-only stages; determining the correction coefficient corresponding to the pure heating stage based on the estimated charging times and actual charging times corresponding to the multiple pure heating stages; determining the correction coefficient corresponding to the charging-while-heating stage based on the estimated charging times and actual charging times corresponding to the multiple charging-while-heating stages; determining the correction coefficient corresponding to the charging-only stage based on the estimated charging times and actual charging times corresponding to the multiple charging-only stages.

[0120] An embodiment of the present invention also provides a computer program product, including a computer program. Optionally, in this embodiment, when the computer program is executed by a processor, it can achieve: obtaining the battery temperature of a target vehicle in a charging state; determining the target charging stage corresponding to the target vehicle based on the battery temperature; determining the remaining initial charging time of the target vehicle based on the battery temperature and the target charging stage; obtaining correction coefficients corresponding to each of the multiple charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the multiple charging stages are determined based on the historical charging conditions of the target vehicle; and determining the target remaining charging time of the target vehicle based on the correction coefficients corresponding to each of the multiple charging stages and the remaining initial charging time.

[0121] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0122] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0123] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0124] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0125] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0126] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, and other media that can store program code.

[0127] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for determining the remaining charging time, characterized in that: include: Obtaining the battery temperature of the target vehicle in a charging state; Determining a target charging stage corresponding to the target vehicle based on the battery temperature; determining a remaining time for initial charging of the target vehicle based on the battery temperature and the target charging stage; Obtaining correction coefficients corresponding to each of a plurality of charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the plurality of charging stages are determined based on a historical charging condition of the target vehicle; A target remaining charging time for the target vehicle is determined based on the correction coefficients corresponding to the multiple charging stages and the initial remaining charging time.

2. The method according to claim 1, characterized in that The multiple charging stages include a pure heating stage, a charging and heating stage, and a charging-only stage, wherein the pure heating stage is a stage in which the battery temperature does not exceed a first preset threshold value, the charging and heating stage is a stage in which the battery temperature is between the first preset threshold value and a second preset threshold value, and the charging-only stage is a stage in which the battery temperature is not lower than the second preset threshold value.

3. The method according to claim 2, characterized in that The determining, based on the battery temperature and the target charging stage, a remaining time for initial charging of the target vehicle includes: When the target charging stage is the pure heating stage, determining a first remaining charging time corresponding to the battery temperature based on a preset correspondence between the pure heating stage temperature and the remaining charging time; Obtaining a battery voltage corresponding to the target vehicle; determining, based on the battery voltage, remaining charging times corresponding to the charging-while-heating phase and the charging-only phase; The initial remaining charging time is determined based on the first remaining charging time and the remaining charging times corresponding to the charging-while-heating stage and the charging-only stage.

4. The method according to claim 2, characterized in that The determining, based on the battery temperature and the target charging stage, a remaining time for initial charging of the target vehicle includes: When the target charging stage is the charging and heating stage, obtaining a battery voltage corresponding to the target vehicle; Based on the corresponding relationship between the temperature, voltage, and remaining charging time corresponding to the charging and heating stage, determining a second remaining charging time corresponding to the charging and heating stage according to the battery voltage and the battery temperature; Determining a remaining charging time corresponding to the charging-only phase based on the battery voltage; The initial charging remaining time is determined based on the second charging remaining time and the charging remaining time corresponding to the charging-only stage.

5. The method according to claim 2, characterized in that The determining, based on the battery temperature and the target charging stage, a remaining time for initial charging of the target vehicle includes: When the target charging stage is a charging-only stage, obtaining a battery voltage corresponding to the target vehicle; Based on the correspondence between the voltage corresponding to the charging-only stage and the remaining charging time, determining a third remaining charging time corresponding to the charging-only stage according to the battery voltage; The initial charging remaining time is determined according to the third charging remaining time.

6. The method according to claim 2, characterized in that The obtaining of correction coefficients corresponding to the plurality of charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to the plurality of charging stages are determined based on a historical charging condition of the target vehicle, includes: Obtaining historical charging data corresponding to the target vehicle, wherein the historical charging data includes estimated charging times and actual charging times corresponding to multiple pure heating phases, estimated charging times and actual charging times corresponding to multiple charging-and-heating phases, and estimated charging times and actual charging times corresponding to multiple charging-only phases; Determining a correction coefficient corresponding to the pure heating phase based on the estimated charging durations and actual charging durations corresponding to the multiple pure heating phases; Determining a correction coefficient corresponding to the charging-while-heating stage based on the estimated charging times and the actual charging times corresponding to the multiple charging-while-heating stages; Based on the estimated charging durations and actual charging durations corresponding to the multiple charging-only stages, a correction coefficient corresponding to the charging-only stage is determined.

7. A device for determining the remaining charging time, characterized in that: include: A first acquisition module is used to obtain the battery temperature of the target vehicle in a charging state; A first determining module is configured to determine a target charging stage corresponding to the target vehicle based on the battery temperature; a second determining module, configured to determine a remaining time for initial charging of the target vehicle based on the battery temperature and the target charging stage; A second acquisition module is configured to acquire correction coefficients corresponding to each of the plurality of charging stages corresponding to the target vehicle, wherein the correction coefficients corresponding to each of the plurality of charging stages are determined based on a historical charging condition of the target vehicle; The third determining module is configured to determine a target remaining charging time for the target vehicle based on the correction coefficients corresponding to the multiple charging stages and the initial remaining charging time.

8. A non-volatile storage medium, characterized in that: The non-volatile storage medium includes a stored program, wherein when the program is executed, the device where the non-volatile storage medium is located is controlled to execute the method for determining the remaining charging time according to any one of claims 1 to 6.

9. A computer device, characterized in that: include: memory and processor, The memory stores a computer program; The processor is configured to execute a computer program stored in the memory, wherein when the computer program is executed, the processor executes the method for determining the remaining charging time according to any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for determining the remaining charging time according to any one of claims 1 to 6 is implemented.

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