Battery residual charging duration acquisition method and device, medium and vehicle

Abstract

The application discloses a battery residual charging duration acquisition method and device, a medium and a vehicle. The method comprises the following steps: after the battery is calibrated to a first residual capacity at a preset experimental temperature, charging is performed, and after the voltage of the battery reaches a preset voltage, the charging current of the battery is adjusted to a rated current value for charging; voltage values and charging capacities of the battery at multiple sampling moments are acquired, and a charging completion moment of the battery is acquired, wherein the charging completion moment is a moment when the voltage value reaches a cutoff voltage; a relationship table of the voltage value and the real residual capacity and the residual charging duration is obtained based on the charging completion moment, the voltage value and the charging capacity, wherein the relationship table is used to determine the residual charging duration of the battery in the actual charging process of the battery. The technical scheme provided by the application can improve the accuracy of obtaining the residual charging duration of the battery.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, and in particular relates to a method, device, medium and vehicle for obtaining the remaining charging time of a battery. Background Technology

[0002] In the current market, most batteries have a corresponding charging meter that displays different temperatures, states of charge (SOC), and remaining charging time. During actual charging, the remaining charge and charging time shown on the display are obtained by looking up these values ​​in the meter based on the battery's temperature and remaining charge. However, towards the end of the charging process, when the battery is close to full charge, the display often shows a discrepancy between the displayed information and the actual charging status, resulting in a poor user experience.

[0003] Therefore, this application proposes a more accurate method for obtaining the remaining battery charging time. Summary of the Invention

[0004] The embodiments of this application provide a method, apparatus, medium, and vehicle for obtaining the remaining charging time of a battery, which can solve the problems of inconsistency between the displayed and actual values ​​of the battery percentage and remaining charging time in the prior art, inaccurate display, and impact on user experience.

[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0006] According to one aspect of the embodiments of this application, a method for obtaining the remaining charging time of a battery is provided, the method comprising: Under a preset experimental temperature, the battery is calibrated to the first remaining charge level and then charged. After the battery voltage reaches a preset voltage, the charging current of the battery is adjusted to the rated current value for charging. The voltage value and charging capacity of the battery at multiple sampling times are obtained, and the charging completion time of the battery is obtained, wherein the charging completion time is the time when the voltage value reaches the cutoff voltage; Based on the charging completion time, the voltage value, and the charging capacity, a relationship table is obtained between the voltage value, the actual remaining capacity, and the remaining charging time. The relationship table is used to determine the remaining charging time of the battery during the actual charging process.

[0007] In some embodiments of this application, obtaining the voltage value and charging capacity of the battery at multiple sampling times, and obtaining the charging completion time of the battery, includes: The starting sampling time is the moment when the charging current of the battery is adjusted to the rated current value. The voltage value and charging capacity of the battery are obtained at multiple sampling times, and the moment when the voltage value reaches the cutoff voltage is taken as the last sampling time to obtain the corresponding charging capacity.

[0008] In some embodiments of this application, obtaining a relationship table between the voltage value and the actual remaining power and remaining charging time based on the charging completion time, the voltage value, and the charging capacity includes: For each sampling time, the actual remaining power corresponding to each voltage value is obtained based on the charging power. Based on the sampling time and the charging completion time, the remaining charging time corresponding to each voltage value is obtained.

[0009] In some embodiments of this application, after obtaining the relationship table between the voltage value and the actual remaining power and remaining charging time, the method further includes: The battery is discharged and calibrated to a second remaining capacity, and then adjusted to a third remaining capacity based on a preset deviation value; At the preset experimental temperature, the battery with the third remaining charge is charged again by adjusting the charging current to the rated current value after the battery voltage reaches the preset voltage, in order to obtain the relationship table.

[0010] In some embodiments of this application, the preset experimental temperature includes multiple different temperatures, and the preset deviation value includes multiple different deviation values; the relationship table includes the correspondence between the voltage value and the actual remaining power and remaining charging time under different temperatures and different deviation values.

[0011] In some embodiments of this application, after obtaining the relationship table between the voltage value and the actual remaining power and remaining charging time, the method further includes: During the actual charging process, the actual temperature of the battery being charged is obtained; Based on the actual temperature, a first target relation table is obtained from multiple relation tables; Based on the first target relationship table and the real-time voltage of the battery, the first actual remaining capacity of the actual rechargeable battery is obtained; Based on the actual remaining power of the actual rechargeable battery and the displayed remaining power of the actual rechargeable battery, a second target relationship table is obtained; Based on the second target relationship table and the real-time voltage of the battery, the second actual remaining capacity and the first remaining charging time of the actual charging battery are obtained.

[0012] In some embodiments of this application, after obtaining the second actual remaining capacity and the first remaining charging time of the actual rechargeable battery, the method further includes: The second target relationship table is used as the third target relationship table for the next charge of the actual rechargeable battery, and the second remaining charging time of the actual rechargeable battery is determined based on the third target relationship table. The ratio of the measured remaining charging time of the actual rechargeable battery to the second remaining charging time is obtained to obtain the correction factor of the actual rechargeable battery. Based on the correction factor and the third target relationship table, the actual remaining capacity and remaining charging time of the actual rechargeable battery for the next charge are calibrated.

[0013] According to one aspect of the embodiments of this application, a battery remaining charging time determination device is provided, the device comprising: The first processing module is used to charge the battery after calibrating it to a first remaining capacity at a preset experimental temperature, and to adjust the charging current of the battery to the rated current value after the voltage of the battery reaches a preset voltage. The acquisition module is used to acquire the voltage value and charging capacity of the battery at multiple sampling times, and to acquire the charging completion time of the battery, wherein the charging completion time is the time when the voltage value reaches the cutoff voltage; The second processing module is used to obtain a relationship table between the voltage value, the actual remaining power, and the remaining charging time based on the charging completion time, the voltage value, and the charging power. The relationship table is used to determine the remaining charging time of the battery during the actual charging process.

[0014] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, wherein at least one piece of program code is stored therein, the at least one piece of program code being loaded and executed by a processor to implement the method described above.

[0015] According to one aspect of the embodiments of this application, a vehicle is provided, the vehicle including one or more processors and one or more memories, the one or more memories storing at least one piece of program code, the at least one piece of program code being loaded and executed by the one or more processors to implement the method as described above.

[0016] Based on the above solution, the technical solution provided in this application has at least the following advantages and advancements: This application, under a preset experimental temperature, calibrates the battery to a first remaining capacity before charging. Once the battery voltage reaches a preset voltage, the charging current is adjusted to the rated current value. The application acquires the battery voltage and charging capacity at multiple sampling times, and obtains the charging completion time, where the charging completion time is the moment the voltage reaches the cutoff voltage. Based on the charging completion time, the voltage value, and the charging capacity, a relationship table is obtained between the voltage value and the actual remaining capacity and remaining charging time. This relationship table is used to determine the remaining charging time of the battery during actual charging. This application obtains an accurate relationship table, which can be used to calibrate the remaining charging time of the battery, avoiding inconsistencies between the displayed information and the actual charging status, and preventing poor user experience.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram showing the changes in the actual and displayed values ​​of the remaining charging time. Figure 2 This is a schematic diagram showing the variation of remaining charging time for different SOCs. Figure 3 Schematic diagram of the method for obtaining the remaining charging time of the battery provided in this application Figure 1 ; Figure 4 Schematic diagram of the method for obtaining the remaining charging time of the battery provided in this application Figure 2 ; Figure 5 Schematic diagram of the method for obtaining the remaining charging time of the battery provided in this application Figure 3 ; Figure 6 Schematic diagram of the method for obtaining the remaining charging time of the battery provided in this application Figure 4 ; Figure 7 This application provides a schematic diagram illustrating the changes in the actual and displayed values ​​of the remaining charging time. Figure 8 A schematic diagram of the battery remaining charging time acquisition device provided in this application; Figure 9 This is a system schematic diagram of a vehicle provided for this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0021] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0022] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0023] It should also be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of the terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0024] In existing technologies, a charging MAP table is referenced when charging a battery. Table 1 is a charging MAP table. As shown in Table 1, the horizontal axis of the charging MAP table corresponds to multiple different temperatures, such as T1~T6; the vertical axis of the charging MAP table corresponds to multiple different SOCs, such as X1~X6; and the parameters corresponding to different temperatures and different SOC values, such as X1T1, etc., which represent the remaining charging time at a certain temperature and a certain SOC value.

[0025] Table 1 Charging MAP

[0026] The existing technology for determining the remaining charging time based on the charging MAP table is as follows: calculate the remaining charging time required to fully charge the battery at the given SOC and temperature for each block within each table, and then sum the remaining charging times for different blocks to obtain the total remaining charging time. For example, at temperature T3, after the battery SOC reaches X4, the remaining charging time is the sum of X5T3 and X6T3.

[0027] However, when charging reaches the end (i.e., near full charge, such as above 80%), the displayed SOC will follow the voltage change. Because voltage polarization is not a linear phenomenon, the displayed SOC will change at a non-uniform rate in the later stages, causing the remaining charging time to differ from the actual rate of time elapsed. For example, the inconsistent rate of voltage rise during the final cell polarization leads to uneven SOC changes. Since the calculation of remaining charging time is related to the SOC value, this results in a discrepancy between the remaining charging time and the actual rate of time elapsed. A detailed analysis follows: Figure 1 This is a schematic diagram illustrating the changes in the actual and displayed values ​​of remaining charging time in existing technology. Figure 2 This is a schematic diagram showing the variation of remaining charging time for different SOCs. Figure 1 and Figure 2 The units for both the horizontal and vertical axes are minutes. For example... Figure 1 As shown, when there is a deviation in SOC, the remaining charging time at the end of the charging process typically drops sharply to 0 minutes or remains for a long period of 1 minute. For example... Figure 2 As shown, when the SOC is high, the display shows that after the SOC reaches 99%, the remaining charging time is only 1 minute. The actual battery charging voltage has not reached the full charge cutoff voltage, so the battery will wait for a long time at the 1 minute mark. Similarly, when the SOC is low, the display may show that the SOC has only reached 97%, and there are still a few minutes left. However, because the individual cell voltage has reached the cutoff voltage, the remaining charging time will immediately jump to 0 minutes.

[0028] It is evident that existing technologies are inaccurate in determining the remaining charging time. Therefore, this application proposes a more accurate method for obtaining the remaining battery charging time.

[0029] Figure 3 Schematic diagram of the method for obtaining the remaining charging time of the battery provided in this application Figure 1 ,like Figure 3 As shown, the method includes: S301. Under a preset experimental temperature, the battery is calibrated to the first remaining charge level and then charged. After the battery voltage reaches a preset voltage, the charging current of the battery is adjusted to the rated current value for charging.

[0030] The preset test temperatures include multiple different temperatures, each tested separately. These preset test temperatures are determined based on the actual temperatures the battery might encounter during real-world use; since this actual temperature may be a range, multiple values ​​can be taken within this range to obtain multiple different preset test temperatures. In a single experiment, one of these preset test temperatures can be selected for testing. The remaining battery power is usually displayed as a percentage.

[0031] At the start of the experiment, the battery's remaining charge is calibrated to a level that accurately reflects its current state. During calibration, the battery is not yet at the end of the charging process, allowing for accurate calibration using existing technology. After calibration, the battery is continuously charged while its voltage is monitored in real time. When the battery voltage reaches a preset voltage, the charging current is adjusted to the rated current value to continue charging, thus ensuring more accurate subsequent measurements such as voltage. The preset voltage can be set to the battery's rated voltage or selected based on the engineer's experience; the rated current value can also be the battery's rated current value or selected based on the engineer's experience.

[0032] S302. Obtain the voltage value and charging capacity of the battery at multiple sampling times, and obtain the charging completion time of the battery, wherein the charging completion time is the time when the voltage value reaches the cutoff voltage.

[0033] The time interval between each sampling moment can be in milliseconds, meaning multiple samples can be taken per second. As the sampling time progresses, the battery voltage and charging capacity are acquired multiple times. Thus, at the end of the charging process, the trends of the battery voltage and charging capacity over time can be obtained.

[0034] When the voltage value obtained at a certain sampling moment is greater than or equal to the cutoff voltage, that sampling moment is taken as the last sampling moment, and the last sampling moment is taken as the charging completion moment of the battery, and charging is terminated to avoid damage to the battery.

[0035] The sampling time can start when the experiment begins charging the battery, when the battery is calibrated to its initial remaining capacity, or when the battery's charging current is adjusted to its rated value. For example, obtaining the voltage value and charging capacity of the battery at multiple sampling times, and obtaining the charging completion time of the battery, including: The starting sampling time is the moment when the charging current of the battery is adjusted to the rated current value. The voltage value and charging capacity of the battery are obtained at multiple sampling times, and the moment when the voltage value reaches the cutoff voltage is taken as the last sampling time to obtain the corresponding charging capacity.

[0036] Alternatively, the sampling time can be set as the moment when the battery is calibrated to the first remaining charge, and the battery voltage and charge level can be obtained at multiple sampling times. The moment when the voltage reaches the cutoff voltage can be used as the last sampling time to obtain the corresponding charge level.

[0037] Regardless of the starting sampling time, the remaining charging time of the battery can be calculated by working backward from the time the charging is completed.

[0038] S303. Based on the charging completion time, the voltage value, and the charging capacity, obtain a relationship table between the voltage value, the actual remaining capacity, and the remaining charging time, wherein the relationship table is used to determine the remaining charging time of the battery during the actual charging process of the battery.

[0039] Based on the voltage values ​​and charging completion times at each sampling moment, the remaining charging time corresponding to the voltage value can be calculated. Based on the initial battery capacity and the charging capacity at each sampling moment, the actual remaining capacity at each sampling moment can be obtained. Based on the actual remaining capacity and charging completion time at each sampling moment, the remaining charging time corresponding to the actual remaining capacity can be calculated. After obtaining the relationship table between this voltage value, the actual remaining capacity, and the remaining charging time, the remaining capacity and remaining charging time displayed on the screen can be adjusted according to this relationship table during actual charging.

[0040] To enable the relationship table to adapt to various scenarios, in addition to setting different preset experimental temperatures, it is also possible to set a standard remaining power level based on a preset deviation value, and then conduct experiments with the adjusted remaining power level. One preset deviation value corresponds to one experiment. For example, after obtaining the relationship table between the voltage value and the actual remaining power and remaining charging time, the method further includes: The battery is discharged and calibrated to a second remaining capacity, and then adjusted to a third remaining capacity based on a preset deviation value; At the preset experimental temperature, the battery with the third remaining charge is charged again by adjusting the charging current to the rated current value after the battery voltage reaches the preset voltage, in order to obtain the relationship table.

[0041] For example, the preset deviation value includes multiple different deviation values; the relationship table includes the correspondence between the voltage value and the actual remaining power and remaining charging time under different temperatures and different deviation values.

[0042] The first and second remaining capacities are both standard remaining capacities of the battery at the calibration time, neither of which has reached the end of battery charging. Therefore, they can be calibrated using existing technology. After calibration, the battery is continuously charged, and steps S301 to S303 are repeated to obtain a table showing the relationship between the voltage value, the actual remaining capacities, and the remaining charging time when the value deviates from the standard value (second remaining capacities) by a preset deviation value. Multiple preset deviation values ​​can be set, which can be higher or lower than the standard value.

[0043] In other words, this application not only obtains a relationship table under different preset experimental temperatures at a standard value (such as the first remaining charge), but also obtains a relationship table under different preset experimental temperatures at each preset deviation value; thus, the battery end charging can be calibrated based on the relationship table in various scenarios.

[0044] In this embodiment, after calibrating the battery to a first remaining capacity at a preset experimental temperature, the battery is charged at the end with the rated current. The voltage value and charging capacity at multiple sampling moments are obtained and the charging completion time is recorded. Then, a relationship table between the voltage value and the actual remaining capacity and remaining charging time is established. This allows the displayed remaining capacity and remaining charging time to be corrected according to the relationship table during the actual charging process, thereby eliminating the abnormal display of remaining charging time caused by SOC deviation and voltage polarization. This solves the problems of the remaining charging time at the end not matching the actual time, displaying for a long time of one minute or dropping to zero instantly, and improves the user's display experience at the end of the charging process.

[0045] Furthermore, by introducing a preset deviation value during the experimental calibration phase, the standard remaining charge is offset positively or negatively and the experiment is repeated. This can cover various scenarios of remaining charge display deviation caused by long-term use or current integration error in the battery management system. The established relationship table not only includes the mapping relationship between voltage and remaining charge and remaining charging time at different temperatures, but also includes correction data under different degrees of deviation. Thus, in the actual charging process, regardless of whether the currently displayed remaining charge is too high, too low, or accurate, the system can accurately correct the remaining charge and remaining charging time based on this relationship table, avoiding abnormal end-of-charge time caused by initial deviation of the remaining charge, thereby improving the applicability of this application.

[0046] Figure 4 Schematic diagram of the method for obtaining the remaining charging time of the battery provided in this application Figure 2 ,like Figure 4 As shown, the method includes: S401. For each sampling time, obtain the actual remaining power corresponding to each voltage value based on the charging power.

[0047] If the initial sampling time is the moment when the battery's charging current is adjusted to the rated current value, then the remaining battery capacity at the initial sampling time can be used as the initial remaining capacity. The actual remaining capacity at each sampling time can be the charging capacity at that sampling time plus the initial remaining capacity; for example, the actual remaining capacity at the second sampling time is the initial remaining capacity plus the charging capacity at the second sampling time. By mapping the voltage value at the same sampling time to the actual remaining capacity, the correspondence between voltage value and actual remaining capacity can be obtained.

[0048] S402. Based on the sampling time and the charging completion time, obtain the remaining charging time corresponding to each voltage value.

[0049] Subtracting a sampling time from the charging completion time yields the remaining charging time corresponding to the voltage value at that sampling time. For example, if the charging completion time is the last sampling time, the remaining charging time corresponding to the voltage value at the second-to-last sampling time is the charging completion time minus the second-to-last sampling time.

[0050] In this embodiment, by obtaining the actual remaining power corresponding to the voltage value at each sampling moment based on the charging power, and obtaining the remaining charging time corresponding to each voltage value based on the sampling moment and the charging completion moment, the voltage data collected at the charging end can be accurately correlated with the actual remaining power and remaining charging time. A complete mapping relationship between voltage value and actual remaining power and remaining charging time is established, ensuring that in the actual charging process, only the voltage needs to be measured to obtain the accurate remaining power and remaining charging time by looking up the table. This avoids the error in calculating the remaining charging time at the end caused by the SOC display deviation in the traditional method, and improves the accuracy and reliability of the remaining charging time estimation.

[0051] Figure 5 Schematic diagram of the method for obtaining the remaining charging time of the battery provided in this application Figure 3 ,like Figure 5 As shown, the method includes: S501. During the actual charging process, obtain the actual temperature of the battery being charged.

[0052] S502. Based on the actual temperature, obtain the first target relation table from the plurality of relation tables.

[0053] S503. Based on the first target relationship table and the real-time voltage of the battery, obtain the first actual remaining power of the actual rechargeable battery.

[0054] S504. Based on the actual remaining power of the actual rechargeable battery and the displayed remaining power of the actual rechargeable battery, obtain a second target relationship table.

[0055] S505. Based on the second target relationship table and the real-time voltage of the battery, obtain the second actual remaining capacity and remaining charging time of the actual charging battery.

[0056] In the actual charging process, the actual temperature of the actual charging battery is first obtained; the relationship table without deviation values ​​obtained in the above embodiment is used as the first target relationship table; the actual remaining capacity of the actual charging battery is obtained by querying the first target relationship table through the real-time voltage of the battery; based on the actual remaining capacity of the actual charging battery and the displayed remaining capacity of the actual charging battery, the deviation value of the actual charging battery is obtained, and this deviation value is used as the actual deviation value of the actual charging battery; a second target relationship table is obtained based on the actual temperature and the actual deviation value; based on the second target relationship table and the real-time voltage of the battery, the second actual remaining capacity and remaining charging time of the actual charging battery are obtained, and finally the second actual remaining capacity and remaining charging time are displayed.

[0057] In this embodiment, the accuracy and reliability of the remaining charging time display are improved by querying a pre-calibrated relationship table.

[0058] Figure 6 Schematic diagram of the method for obtaining the remaining charging time of the battery provided in this application Figure 4 ,like Figure 6 As shown, the method includes: S601. Use the second target relationship table as the third target relationship table for the next charging of the actual charging battery, and determine the second remaining charging time of the actual charging battery based on the third target relationship table.

[0059] S602. Obtain the ratio of the measured remaining charging time of the actual rechargeable battery to the second remaining charging time, obtain the correction factor of the actual rechargeable battery, and calibrate the actual remaining capacity and remaining charging time of the actual rechargeable battery for the next charge based on the correction factor and the third target relationship table.

[0060] After determining that the actual rechargeable battery can be calibrated using the second target relationship table, the second target relationship table can be used multiple times during subsequent charging processes as the third target relationship table for calibrating the actual rechargeable battery's true remaining capacity and remaining charging time. However, due to issues such as battery aging, the third target relationship table is no longer applicable to the actual rechargeable battery. Therefore, a correction factor can be calculated to correct the parameters matched from the third target relationship table. For example, based on the third target relationship table and the real-time voltage of the actual rechargeable battery, the third true remaining capacity and the second remaining charging time of the actual rechargeable battery can be determined. If the correction factor is not 1, the correction factor is multiplied by the third true remaining capacity and the second remaining charging time respectively to obtain the correct fourth true remaining capacity and the third remaining charging time, which are then displayed.

[0061] In this embodiment, the actual remaining capacity and remaining charging time of the battery during actual charging are corrected through an adaptive learning process, which can dynamically adapt to changes in the battery (aging, etc.) and further calibrate the battery.

[0062] The following is a complete implementation example: The battery system first calibrates the battery's State of Charge (SOC) at different temperatures. After using the accurate SOC, the individual cell voltages are charged to the specified voltage. The charging current is then changed to the rated current value, and the trend of individual cell voltage changes under the rated current value is measured. Finally, the charging completion time (charging completion moment) and the charging capacity (charging amount) are statistically analyzed. The calibrated battery is then subjected to different SOC values ​​at different temperatures, and the previous tests are repeated. The test data is used to calibrate the relationship between the trend of individual cell voltage changes under the rated current, the true SOC, and the remaining charging time, thus completing the calibration.

[0063] After charging the battery to its rated voltage, a constant current charging method is used to display the battery polarization voltage. The accurate remaining charging time is calculated using the battery's polarization curve and the aforementioned calibration relationship, and then the remaining charging time is adjusted to the accurate calculated value. If the battery's SOC deviates from the specified value, the aforementioned charging method is used again, and the true SOC and remaining charging time are calculated using the battery's polarization curve and the aforementioned calibration relationship, and then the true SOC and remaining charging time are adjusted to the calculated values.

[0064] Figure 7 This is a schematic diagram illustrating the changes in the actual and displayed values ​​of the remaining charging time, as provided in this application. Figure 7 As shown, Figure 7The units on both the horizontal and vertical axes are in minutes. During actual battery charging, individual cells are charged to their rated voltage, then charged using the rated current. The voltage trend is calculated, and the remaining charging time is estimated using previously calibrated data. The displayed time is then immediately updated to the calibrated remaining charging time. This ensures that the displayed time matches the actual remaining charging time, and that the rate of time elapsed on the displayed time matches the rate of time elapsed on the actual time. The cumulative charging time can be the cumulative charging time from the start of charging to the current time, and the remaining charging time can be the time remaining until the completion of charging from the current time.

[0065] When the battery's State of Charge (SOC) deviates (due to prolonged use and incomplete charging, SOC deviations can occur to varying degrees due to calculation errors and other factors), the same charging method is used to calculate the voltage change trend. Using previously calibrated data, the battery's actual SOC and remaining charging time are then adjusted to the calculated values. This ensures that the remaining charging time matches the actual remaining charging time.

[0066] Meanwhile, the vehicle's calibration data is not static. It can be continuously updated through learning from subsequent charging data to ensure that the remaining charging time at the end of the charging process remains consistent. This is primarily to address the fact that over long-term use, factors such as battery lifespan and changes in internal materials can cause slow variations in the relationship between remaining charging time and voltage.

[0067] This application addresses the issue of inaccurate end-of-charge time by incorporating an end-of-charge voltage calculation method, thus resolving the discrepancy between the decrease in end-of-charge time and the actual time; it also resolves the problem of prolonged waiting time of up to one minute when the SOC deviation is high; and it addresses the phenomenon of the end-of-charge time suddenly dropping to zero when the SOC is low.

[0068] The following describes an apparatus embodiment of this application, which can be used to perform the methods described in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the methods described in the above embodiments of this application.

[0069] Figure 8 This is a schematic diagram of the battery remaining charging time acquisition device provided in this application. The device 800 may include: a first processing module 801, an acquisition module 802, and a second processing module 803.

[0070] The first processing module 801 is used to charge the battery after calibrating it to a first remaining power level at a preset experimental temperature, and to adjust the charging current of the battery to the rated current value after the voltage of the battery reaches a preset voltage. The acquisition module 802 is used to acquire the voltage value and charging capacity of the battery at multiple sampling times, and to acquire the charging completion time of the battery, wherein the charging completion time is the time when the voltage value reaches the cutoff voltage; The second processing module 803 is used to obtain a relationship table between the voltage value, the actual remaining power, and the remaining charging time based on the charging completion time, the voltage value, and the charging power. The relationship table is used to determine the remaining charging time of the battery during the actual charging process.

[0071] It should be noted that for any content not described in detail in this embodiment of the device, please refer to the method described above.

[0072] Figure 9 This is a system schematic diagram of a vehicle provided for this application. For example... Figure 9 As shown, the vehicle includes a memory 904, a processor 902, and a computer program stored in the memory 904 and executable on the processor 902. When the processor 902 executes the computer program, it implements the method provided in any embodiment of the present invention.

[0073] Among them, Figure 9 In this document, a bus architecture (represented by bus 900) is used. Bus 900 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 902 and memory represented by memory 904. Bus 900 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 905 provides an interface between bus 900 and receiver 901 and transmitter 903. Receiver 901 and transmitter 903 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 902 is responsible for managing bus 900 and general processing, while memory 904 can be used to store data used by processor 902 during operation.

[0074] Based on the same inventive concept, embodiments of the present invention provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method provided in any embodiment of the present invention.

[0075] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0076] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0077] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0078] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0079] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0080] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0081] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A method for obtaining the remaining charging time of a battery, characterized in that, The method includes: Under a preset experimental temperature, the battery is calibrated to the first remaining charge level and then charged. After the battery voltage reaches a preset voltage, the charging current of the battery is adjusted to the rated current value for charging. The voltage value and charging capacity of the battery at multiple sampling times are obtained, and the charging completion time of the battery is obtained, wherein the charging completion time is the time when the voltage value reaches the cutoff voltage; Based on the charging completion time, the voltage value, and the charging capacity, a relationship table is obtained between the voltage value, the actual remaining capacity, and the remaining charging time. The relationship table is used to determine the remaining charging time of the battery during the actual charging process.

2. The method according to claim 1, characterized in that, The steps of obtaining the voltage value and charging capacity of the battery at multiple sampling times, and obtaining the charging completion time of the battery, include: The starting sampling time is the moment when the charging current of the battery is adjusted to the rated current value. The voltage value and charging capacity of the battery are obtained at multiple sampling times, and the moment when the voltage value reaches the cutoff voltage is taken as the last sampling time to obtain the corresponding charging capacity.

3. The method according to claim 1, characterized in that, The step of obtaining a relationship table between the voltage value, the actual remaining power, and the remaining charging time based on the charging completion time, the voltage value, and the charging capacity includes: For each sampling time, the actual remaining power corresponding to each voltage value is obtained based on the charging power. Based on the sampling time and the charging completion time, the remaining charging time corresponding to each voltage value is obtained.

4. The method according to claim 1, characterized in that, After obtaining the relationship table between the voltage value and the actual remaining power and remaining charging time, the method further includes: The battery is discharged and calibrated to a second remaining capacity, and then adjusted to a third remaining capacity based on a preset deviation value; At the preset experimental temperature, the battery with the third remaining charge is charged again by adjusting the charging current to the rated current value after the battery voltage reaches the preset voltage, in order to obtain the relationship table.

5. The method according to claim 4, characterized in that, The preset experimental temperature includes multiple different temperatures, and the preset deviation value includes multiple different deviation values; the relationship table includes the correspondence between the voltage value and the actual remaining power and remaining charging time under different temperatures and different deviation values.

6. The method according to claim 1, characterized in that, After obtaining the relationship table between the voltage value and the actual remaining power and remaining charging time, the method further includes: During the actual charging process, the actual temperature of the battery being charged is obtained; Based on the actual temperature, a first target relation table is obtained from multiple relation tables; Based on the first target relationship table and the real-time voltage of the battery, the first actual remaining capacity of the actual rechargeable battery is obtained; Based on the actual remaining power of the actual rechargeable battery and the displayed remaining power of the actual rechargeable battery, a second target relationship table is obtained; Based on the second target relationship table and the real-time voltage of the battery, the second actual remaining capacity and the first remaining charging time of the actual charging battery are obtained.

7. The method according to claim 6, characterized in that, After obtaining the second actual remaining capacity and the first remaining charging time of the actual rechargeable battery, the method further includes: The second target relationship table is used as the third target relationship table for the next charge of the actual rechargeable battery, and the second remaining charging time of the actual rechargeable battery is determined based on the third target relationship table. The ratio of the measured remaining charging time of the actual rechargeable battery to the second remaining charging time is obtained to obtain the correction factor of the actual rechargeable battery. Based on the correction factor and the third target relationship table, the actual remaining capacity and remaining charging time of the actual rechargeable battery for the next charge are calibrated.

8. A device for determining the remaining charging time of a battery, characterized in that, The device includes: The first processing module is used to charge the battery after calibrating it to a first remaining capacity at a preset experimental temperature, and to adjust the charging current of the battery to the rated current value after the voltage of the battery reaches a preset voltage. The acquisition module is used to acquire the voltage value and charging capacity of the battery at multiple sampling times, and to acquire the charging completion time of the battery, wherein the charging completion time is the time when the voltage value reaches the cutoff voltage; The second processing module is used to obtain a relationship table between the voltage value, the actual remaining power, and the remaining charging time based on the charging completion time, the voltage value, and the charging power. The relationship table is used to determine the remaining charging time of the battery during the actual charging process.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to implement the method as described in any one of claims 1 to 7.

10. A vehicle, characterized in that, The vehicle includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to implement the method as claimed in any one of claims 1 to 7.

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