Method for correcting remaining charging time, battery system and storage medium

Abstract

The present invention provides a method for correcting the remaining charging time, a battery system and a storage medium. The remaining charging time displayed in real time on the battery system of an electric vehicle is used as the displayed charging time at the current moment. In the first charging period, the displayed charging time at the current moment is corrected according to a preset first correction rate and the actual charging time. In the second charging period, the displayed charging time at the current moment is corrected according to a second correction rate and the actual charging time. In the third charging period, the displayed charging time at the current moment is corrected according to the third correction rate and the actual charging time. The method determines the correction rates for different periods for different charging periods, effectively avoids the problem of long-term waiting of the displayed charging time at a certain value, and effectively improves the smoothness of the charging time curve during the charging process.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a method for correcting remaining charging time, a battery system and a storage medium. Background Art

[0002] The remaining charging time refers to the time it takes for the battery to be fully charged. It can provide users with accurate information and help them make arrangements in advance. Especially in the field of electric vehicles, accurate assessment of the remaining charging time can facilitate user travel.

[0003] At present, the common correction methods for the remaining charging time in the industry are, on the one hand, to correct the charge calculated by dividing the remaining capacity by the charging current. This correction method will cause the charging time to jump during the charging process; on the other hand, to correct the charge time according to the corresponding charging time of the single cell voltage. This correction method will cause the charging time to be too long at a certain moment, and it may also cause the charging time to be reduced to 0 in advance in the later stage of charging. The remaining charging time curves of these two methods are not smooth, and it is difficult to provide users with accurate remaining time information in real time, which reduces the accuracy of the remaining charging time estimation. Summary of the invention

[0004] The embodiments of the present invention provide a method for correcting the remaining charging time, a battery system and a storage medium, which can improve the technical problem that the remaining charging time curve is not smooth and it is difficult to provide the user with accurate remaining charging time information in real time.

[0005] In a first aspect, an embodiment of the present invention provides a method for correcting a remaining charging time, the method for correcting a remaining charging time comprising:

[0006] Using the remaining charging time displayed in real time on the battery system of the electric vehicle as the displayed charging time at the current moment, wherein the battery system includes a power battery;

[0007] In the first charging period, the displayed charging time at the current moment is corrected according to the preset first correction rate and the actual charging time to obtain a first corrected remaining time;

[0008] The first corrected remaining time at the end of the first charging period is used as the displayed charging time at the start of the second charging period. In the second charging period, the displayed charging time at the current moment is corrected according to the second correction rate and the actual charging time to obtain the second corrected remaining time. The second correction rate is determined according to the current information and the voltage information of the power battery. The second charging period is after the first charging period.

[0009] The second corrected remaining time at the end of the second charging period is used as the displayed charging time at the beginning of the third charging period. In the third charging period, the displayed charging time at the current moment is corrected according to the third correction rate and the actual charging time to obtain the third corrected remaining time. The third correction rate is determined based on the remaining battery capacity of the power battery. The third charging period is after the second charging period.

[0010] In one embodiment, the step of correcting the displayed charging time at the current moment according to the second correction rate and the actual charging time to obtain the second corrected remaining time includes:

[0011] Get the current actual charging current and the current requested charging current;

[0012] Determine a second correction rate according to at least one of a current difference between the current actual charging current and the current requested charging current and a maximum single cell voltage of the power battery within a first preset display charging time;

[0013] Calculate the second correction time according to the actual charging time and the second correction rate;

[0014] The displayed charging time at the current moment is corrected according to the second corrected time to obtain a second corrected remaining time.

[0015] In one embodiment, the step of correcting the displayed charging time at the current moment according to the third correction rate and the actual charging time to obtain the third corrected remaining time includes:

[0016] Obtaining a plurality of second preset display charging times and respective corresponding preset remaining capacity thresholds;

[0017] acquiring the remaining capacity of the power battery when the displayed charging time is the second preset displayed charging time as the current remaining capacity corresponding to the second preset charging time, and determining a third correction rate according to the current remaining capacity and the corresponding preset remaining capacity thresholds and the displayed charging time at the current moment;

[0018] Calculate a third correction time according to the actual charging time and the third correction rate;

[0019] The displayed charging time at the current moment is corrected according to the third corrected time to obtain a third corrected remaining time.

[0020] In one embodiment, the determining the second correction rate according to at least one of the current difference between the current actual charging current and the current requested charging current and the maximum single cell voltage of the power battery within the first preset display charging time includes:

[0021] When the current difference is greater than a preset current threshold, determining a ratio of the current actual charging current to the current requested charging current as the second correction rate;

[0022] When the current difference is less than or equal to the preset current threshold, determining the preset first correction rate as the second correction rate;

[0023] When the maximum single cell voltage corresponding to the first preset displayed charging time is greater than a preset voltage threshold, determining a preset fourth correction rate as the second correction rate;

[0024] When the maximum single cell voltage corresponding to the first preset displayed charging time is less than or equal to a preset voltage threshold, the second correction rate is determined according to the displayed charging time and the first preset displayed charging time.

[0025] In one embodiment, after determining the ratio of the current actual charging current to the current requested charging current as the second correction rate when the current difference is greater than the preset current threshold, the method further includes:

[0026] Obtaining a time difference between a displayed charging time corresponding to a current moment and a first corrected remaining time corresponding to the current moment;

[0027] When the time difference is greater than a preset time threshold, the displayed charging time is modified to the first corrected remaining time.

[0028] In one embodiment, the plurality of second preset display charging times include a first preset charging minutes and a second preset charging minutes, the preset remaining capacity threshold includes a first preset capacity threshold and a second preset capacity threshold, the preset remaining capacity threshold corresponding to the first preset charging minutes is the first preset capacity threshold, the preset remaining capacity threshold corresponding to the second preset charging minutes is the second preset capacity threshold, and the first preset charging minutes is greater than the second preset charging minutes;

[0029] The determining of the third correction rate according to the current remaining capacity and the corresponding preset remaining capacity thresholds and the displayed charging time corresponding to the current moment includes:

[0030] taking the remaining capacity of the power battery when the displayed charging time is the first preset number of charging minutes as the first remaining capacity corresponding to the first preset number of charging minutes;

[0031] determining the third correction rate according to the first remaining capacity, the first preset capacity threshold and the displayed charging time corresponding to the current moment;

[0032] The remaining capacity of the power battery when the displayed charging time is the second preset charging minutes is used as the second remaining capacity corresponding to the second preset charging minutes;

[0033] The third correction rate is determined according to the second remaining capacity, the second preset capacity threshold, and the displayed charging time corresponding to the current moment.

[0034] In one embodiment, determining the third correction rate according to the first remaining capacity, the first preset capacity threshold, and the displayed charging time corresponding to the current moment includes:

[0035] When the first remaining capacity is less than the first preset capacity threshold, determining the third correction rate according to the displayed charging time and the first preset displayed charging time;

[0036] When the first remaining capacity is greater than or equal to the first preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate; or,

[0037] When the displayed charging time is greater than the first preset number of minutes of charging, the ratio of the displayed charging time to the first preset number of minutes of charging is determined as the third correction rate.

[0038] In one embodiment, determining the third correction rate according to the second remaining capacity, the second preset capacity threshold, and the displayed charging time corresponding to the current moment includes:

[0039] When the second remaining capacity is less than the second preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate;

[0040] When the second remaining capacity is greater than or equal to the second preset capacity threshold, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate; or,

[0041] When the displayed charging time is greater than the second preset charging minutes, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate.

[0042] In a second aspect, an embodiment of the present invention provides a device for correcting a remaining charging time, the device for correcting a remaining charging time comprising:

[0043] A determination module, used to use the remaining charging time displayed in real time on the battery system of the electric vehicle as the displayed charging time at the current moment, wherein the battery system includes a power battery;

[0044] A first correction module is used to correct the displayed charging time at the current moment according to a preset first correction rate and the actual charging time during a first charging period to obtain a first corrected remaining time;

[0045] a second correction module, configured to use the first corrected remaining time at the end of the first charging period as the displayed charging time at the start of the second charging period, and to correct the displayed charging time at the current moment according to a second correction rate and the actual charging time in the second charging period to obtain a second corrected remaining time, wherein the second correction rate is determined according to the current information and the voltage information of the power battery, and the second charging period is after the first charging period;

[0046] The third correction module is used to use the second corrected remaining time at the end of the second charging period as the displayed charging time at the beginning of the third charging period. In the third charging period, the displayed charging time at the current moment is corrected according to the third correction rate and the actual charging time to obtain the third corrected remaining time. The third correction rate is determined according to the remaining battery capacity of the power battery. The third charging period is after the second charging period.

[0047] In a third aspect, an embodiment of the present invention provides a battery system, the battery system comprising:

[0048] one or more processors;

[0049] Memory; and

[0050] One or more applications, wherein the one or more applications are stored in the memory and are configured to be executed by the processor to implement the method for correcting the remaining charging time as described in any one of the first aspects.

[0051] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to execute the steps in the method for correcting the remaining charging time as described in any one of the first aspects. Advantageous effects of the embodiments of the present invention:

[0052] In an embodiment of the present invention, by dividing the entire charging period into multiple charging periods, and determining the corresponding correction rate for different charging periods, and correcting the remaining charging time according to the displayed charging time and the correction speed, the remaining charging time of the power battery of the electric vehicle can be modified in real time and accurately, and the smoothness of the remaining charging time curve is improved, thereby improving the technical problem that the remaining charging time curve is not smooth and it is difficult to provide users with accurate remaining charging time information in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 It is a schematic flow chart of an embodiment of a method for correcting the remaining charging time provided by an embodiment of the present invention;

[0055] Figure 2 It is a schematic diagram of the structure of an embodiment of a device for correcting the remaining charging time provided in an embodiment of the present application;

[0056] Figure 3 It is a schematic diagram of the structure of a battery system provided in the embodiments of the present application. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0058] like Figure 1 FIG. 1 is a flow chart of an embodiment of a method for correcting the remaining charging time in an embodiment of the present application. The method for correcting the remaining charging time includes:

[0059] 101. Using the remaining charging time displayed in real time on a battery system of an electric vehicle as the displayed charging time at the current moment, wherein the battery system includes a power battery.

[0060] The displayed charging time at the current moment refers to the remaining charging time of the power battery displayed in real time on the battery system of the electric vehicle. In this embodiment, the displayed charging time is corrected.

[0061] It is worth noting that there are three charging modes for the power battery in this embodiment, namely fast charging mode and slow charging mode. The slow charging mode is divided into slow charging mode 2 and mode 3 according to the power of the charging gun, the charging mode and the duty cycle of CP.

[0062] 102. In a first charging period, the displayed charging time at the current moment is corrected according to a preset first correction rate and the actual charging time to obtain a first corrected remaining time.

[0063] The first charger period is the early stage of charging the power battery. Exemplarily, 0-3 minutes is the first charging period.

[0064] The correction rate refers to the unit change of the displayed charging time. The preset first correction rate refers to the correction rate preset for determining the displayed charging time of the first charging period. For example, the first correction rate R1=1, which means that the actual time decreases by 1min and the displayed charging time decreases by 1min.

[0065] Specifically, the first corrected remaining time T1 can be calculated by the following formula:

[0066] T1=Ti-R1*Tc;

[0067] Among them, Ti is the displayed charging time corresponding to the current moment, Tc is the actual charging time, and R1 is the first correction rate.

[0068] 103. The first corrected remaining time at the end of the first charging period is used as the displayed charging time at the beginning of the second charging period. In the second charging period, the displayed charging time at the current moment is corrected according to the second correction rate and the actual charging time to obtain the second corrected remaining time. The second correction rate is determined based on the current information and voltage information of the power battery. The second charging period is after the first charging period.

[0069] The second charging period is the middle period of charging the power battery. Exemplarily, 3-75 minutes is the second charging period.

[0070] The second correction rate can be determined based on the current information and voltage information of the power battery, where the current information can be the actual charging current, the requested charging current, the difference between the actual charging current and the preset current such as (15.7A or 7A), or the maximum single cell voltage of the power battery at the current moment, and there is no limitation here.

[0071] Specifically, the second corrected remaining time at the end of the first charging period is used as the displayed charging time at the beginning of the second charging period, that is, on the basis of the first corrected remaining time, correction is made according to the actual charging time and the second correction rate to avoid the problem of uneven displayed charging time after correction when the first charging period is changed to the second charging period due to different displayed charging times. Then, the second correction rate can be obtained, and the correction time can be determined according to the second correction rate and the actual charging time. The displayed charging time at the current moment is corrected according to the correction time to obtain the second corrected remaining time. Since the second correction rate is determined by analyzing the voltage information and current information of the power battery in this embodiment, the accuracy of the second correction rate is ensured, thereby realizing real-time and accurate correction of the displayed charging time of the second charging period, and improving the accuracy of the second corrected remaining time and the smoothness of the curve corresponding to the second corrected remaining time.

[0072] Furthermore, the step 103 of correcting the displayed charging time at the current moment according to the second correction rate and the actual charging time to obtain a second corrected remaining time includes: obtaining the current actual charging current and the current requested charging current; determining the second correction rate according to at least one of the current difference between the current actual charging current and the current requested charging current and the maximum single cell voltage of the power battery within the first preset displayed charging time; calculating the second correction time according to the actual charging time and the second correction rate; and correcting the displayed charging time at the current moment according to the second correction time to obtain a second corrected remaining time.

[0073] Among them, the current actual charging current can be collected in real time during the charging process, and the current charging request current can be obtained according to the charging map, which is provided by the battery cell.

[0074] The first preset display charging time refers to a preset display charging time. For example, the first preset display charging time is 30 minutes, that is, the maximum single cell voltage of the power battery is obtained when the display charging time is 30 minutes.

[0075] Specifically, the current difference can be obtained by calculating the difference between the current actual charging current and the current requested charging current, and then the second correction rate can be determined based on the current difference and / or the maximum single-cell voltage. The product of the actual charging time and the second correction rate is then calculated to obtain the second correction time; the displayed charging time at the current moment is corrected according to the second correction time to obtain the second corrected remaining time.

[0076] Furthermore, the second correction rate is determined based on at least one of the current difference between the current actual charging current and the current requested charging current and the maximum single cell voltage of the power battery within the first preset displayed charging time, including: when the current difference is greater than a preset current threshold, the ratio of the current actual charging current to the current requested charging current is determined as the second correction rate; when the current difference is less than or equal to the preset current threshold, the preset first correction rate is determined as the second correction rate; when the maximum single cell voltage corresponding to the first preset displayed charging time is greater than a preset voltage threshold, the preset fourth correction rate is determined as the second correction rate; when the maximum single cell voltage corresponding to the first preset displayed charging time is less than or equal to the preset voltage threshold, the second correction rate is determined according to the displayed charging time and the first preset displayed charging time.

[0077] The preset current threshold is a preset current difference threshold, and illustratively, the preset current threshold may be 15 A. The preset voltage threshold is a preset voltage threshold for determining the second correction rate, and the preset fourth correction rate refers to a preset correction rate, and illustratively, the preset fourth correction rate may be 1 / 3.

[0078] Specifically, when the current difference is greater than the preset current threshold, the ratio of the current actual charging current A1 to the current requested charging current A2, that is, the second correction rate in this case is A1 / A2; when the current difference is less than or equal to the preset current threshold, the preset first correction rate, that is, the second correction rate in this case is R1 in step 102; when the first preset displayed charging time, such as the maximum single cell voltage when the displayed charging time is 30min, is greater than the preset voltage threshold, the preset fourth correction rate is determined as the second correction rate; when the maximum single cell voltage is less than or equal to the preset voltage threshold, the ratio of the displayed charging time to the first preset displayed charging time is determined as the second correction rate. For example, the second correction rate in this case may be displayed charging time / 30.

[0079] It should be noted that the time in this embodiment is in minutes.

[0080] Furthermore, after the ratio of the current actual charging current to the current requested charging current is determined as the second correction rate when the current difference is greater than the preset current threshold, the method also includes: obtaining the time difference between the displayed charging time corresponding to the current moment and the first corrected remaining time corresponding to the current moment; when the time difference is greater than the preset time threshold, modifying the displayed charging time to the first corrected remaining time.

[0081] The preset time threshold is a preset time difference threshold. Exemplarily, the preset time difference threshold is 15 minutes.

[0082] Specifically, when the current difference is greater than the preset current threshold, and the difference between the displayed charging time and the calculated charging time is greater than the preset time difference threshold, it indicates that the displayed charging time has been stuck at a value for a long time. In order to improve the accuracy of the displayed charging time, the displayed charging time is allowed to gradually jump to the calculated charging time within 1 minute, that is, the first corrected remaining time. Moreover, after the jump of the displayed charging time is completed, the displayed charging time decreases at a preset first correction rate R1, further improving the accuracy of the correction of the displayed charging time.

[0083] 104. The second corrected remaining time at the end of the second charging period is used as the displayed charging time at the beginning of the third charging period. In the third charging period, the displayed charging time at the current moment is corrected according to the third correction rate and the actual charging time to obtain the third corrected remaining time. The third correction rate is determined according to the remaining battery capacity of the power battery. The third charging period is after the second charging period.

[0084] Among them, the third charging period is the late stage of power battery charging. Since the rising rate of the power battery's SOC (State of Charge, the battery's charging state, also known as the remaining power) in the late stage of charging follows the rising rate of the maximum single cell voltage, after the power battery's SOC is triggered to follow the maximum single cell voltage, and the power battery's SOC is greater than 95% or 97%, in which, in the fast charging mode, the power battery's SOC is greater than 95%, and in the slow charging mode, the power battery's SOC is greater than 97%, it is determined to have reached the post-charging period.

[0085] The third correction rate can be determined according to the remaining battery capacity of the power battery. For example, the remaining battery capacity that displays the charging time can be compared with a preset capacity threshold such as 97%, 98%, 98.5% or 99%, and the third correction rate can be determined according to the comparison result.

[0086] Specifically, the second corrected remaining time at the end of the second charging period is used as the displayed charging time at the beginning of the third charging period, that is, on the basis of the second corrected remaining time, correction is made according to the actual charging time and the third correction rate to avoid the problem of uneven displayed charging time after correction when the second charging period is changed to the third charging period due to different displayed charging times. Then, the third correction rate can be obtained, and the correction time can be determined according to the third correction rate and the actual charging time. The displayed charging time at the current moment is corrected according to the correction time to obtain the third corrected remaining time. Since the third correction rate is determined by analyzing the remaining battery capacity of the power battery in this embodiment, the accuracy of the third correction rate is ensured, thereby realizing real-time and accurate correction of the displayed charging time of the third charging period, and improving the accuracy of the third corrected remaining time and the smoothness of the curve corresponding to the third corrected remaining time.

[0087] It should be noted that if it is detected that the remaining battery capacity of the power battery is 100%, the displayed charging time at the current moment is modified to 0. The remaining battery capacity of the power battery is 100%, indicating that the power battery is fully charged. The displayed charging time at the current moment is modified to 0, thereby realizing the calibration of the entire displayed charging time of the power battery. Due to the precise correction rate, the accuracy of the first corrected remaining time, the second corrected remaining time, and the third corrected remaining time is improved, and the smoothness of the curve corresponding to the first corrected remaining time, the smoothness of the curve corresponding to the second corrected remaining time, and the smoothness of the curve corresponding to the third corrected remaining time are improved, thereby greatly improving the smoothness of the correction of the displayed charging time of the power battery, and then providing users with real-time and accurate time information.

[0088] Furthermore, the method of correcting the displayed charging time at the current moment according to the third correction rate and the actual charging time in step 104 to obtain a third corrected remaining time includes: obtaining a plurality of second preset displayed charging times and their corresponding preset remaining capacity thresholds; obtaining the remaining capacity of the power battery when the displayed charging time is the second preset displayed charging time as the current remaining capacity corresponding to the second preset charging time, and determining a third correction rate according to the current remaining capacity and the corresponding preset remaining capacity thresholds and the displayed charging time at the current moment; calculating the third correction time according to the actual charging time and the third correction rate; and correcting the displayed charging time at the current moment according to the third correction time to obtain a third corrected remaining time.

[0089] Among them, the second preset charging time refers to the pre-set charging display time. For example, for the fast charging mode, multiple second preset charging times are 12min and 4min. For the slow charging mode, multiple second preset charging times are 18min and 8min. The remaining capacity is the remaining battery capacity of the power battery when the charging display time is the second preset charging time such as 12min, 4min, 18min, and 8min.

[0090] Specifically, the third correction rate can be determined by comparing the current remaining capacity with the corresponding preset remaining capacity thresholds, and whether the displayed charging time at the current moment exceeds the corresponding second preset displayed charging time, and then the product of the actual charging time and the third correction rate is calculated to obtain the third correction time. The displayed charging time at the current moment is corrected according to the third correction time to obtain the third corrected remaining time.

[0091] Further, the multiple second preset displayed charging times include a first preset charging minutes and a second preset charging minutes, the preset remaining capacity threshold includes a first preset capacity threshold and a second preset capacity threshold, the preset remaining capacity threshold corresponding to the first preset charging minutes is the first preset capacity threshold, the preset remaining capacity threshold corresponding to the second preset charging minutes is the second preset capacity threshold, and the first preset charging minutes is greater than the second preset charging minutes; the determining the third correction rate according to the current remaining capacity and the respective corresponding preset remaining capacity thresholds and the displayed charging time corresponding to the current moment includes: taking the remaining capacity of the power battery when the displayed charging time is the first preset charging minutes as the first remaining capacity corresponding to the first preset charging minutes; determining the third correction rate according to the first remaining capacity, the first preset capacity threshold and the displayed charging time corresponding to the current moment; taking the remaining capacity of the power battery when the displayed charging time is the second preset charging minutes as the second remaining capacity corresponding to the second preset charging minutes; determining the third correction rate according to the second remaining capacity, the second preset capacity threshold and the displayed charging time corresponding to the current moment.

[0092] Among them, the multiple second preset displayed charging times are respectively the first preset charging minutes and the second preset charging minutes. For example, the first preset charging minutes is 12, and the second preset charging minutes is 4.

[0093] Specifically, the third correction rate is determined according to the first remaining capacity, the first preset capacity threshold and the displayed charging time corresponding to the current moment, and the third correction rate is determined according to the second remaining capacity, the second preset capacity threshold and the displayed charging time corresponding to the current moment, thereby realizing the calculation of the third correction speed.

[0094] Further, the third correction rate is determined based on the first remaining capacity, the first preset capacity threshold and the displayed charging time corresponding to the current moment, including: when the first remaining capacity is less than the first preset capacity threshold, the third correction rate is determined based on the displayed charging time and the first preset displayed charging time; when the first remaining capacity is greater than or equal to the first preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate; or, when the displayed charging time is greater than the first preset charging minutes, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate.

[0095] Specifically, when the first remaining capacity is less than the first preset capacity threshold, the ratio of the displayed charging time to the first preset displayed charging time is determined as the third correction rate; when the first remaining capacity is greater than or equal to the first preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate; or, when the first remaining capacity is greater than or equal to the first preset capacity threshold and the displayed charging time is greater than the first preset charging minutes, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate, thereby achieving accurate calculation of the third correction rate.

[0096] Further, the third correction rate is determined based on the second remaining capacity, the second preset capacity threshold and the displayed charging time corresponding to the current moment, including: when the second remaining capacity is less than the second preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate; when the second remaining capacity is greater than or equal to the second preset capacity threshold, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate; or, when the displayed charging time is greater than the second preset charging minutes, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate.

[0097] Specifically, when the second remaining capacity is less than the second preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate; when the second remaining capacity is greater than or equal to the second preset capacity threshold, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate; or, when the second remaining capacity is greater than or equal to the second preset capacity threshold and the displayed charging time is greater than the second preset charging minutes, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate, thereby realizing the third correction rate.

[0098] The present application also provides a device for correcting the remaining charging time, which can be referred to Figure 2As shown, including:

[0099] A determination module 201 is used to use the remaining charging time displayed in real time on the battery system of the electric vehicle as the displayed charging time at the current moment, wherein the battery system includes a power battery;

[0100] A first correction module 202 is used to correct the displayed charging time at the current moment according to a preset first correction rate and the actual charging time during the first charging period to obtain a first corrected remaining time;

[0101] A second correction module 203 is used to use the first corrected remaining time at the end of the first charging period as the displayed charging time at the start of the second charging period. In the second charging period, the displayed charging time at the current moment is corrected according to a second correction rate and the actual charging time to obtain a second corrected remaining time. The second correction rate is determined according to the current information and the voltage information of the power battery. The second charging period is after the first charging period.

[0102] The third correction module 204 is used to use the second corrected remaining time at the end of the second charging period as the displayed charging time at the beginning of the third charging period. In the third charging period, the displayed charging time at the current moment is corrected according to the third correction rate and the actual charging time to obtain the third corrected remaining time. The third correction rate is determined according to the remaining battery capacity of the power battery. The third charging period is after the second charging period.

[0103] In some embodiments of the present application, the second correction module 203 is further used to obtain a plurality of second preset display charging times and respective corresponding preset remaining capacity thresholds;

[0104] The remaining capacity of the power battery when the displayed charging time is the second preset displayed charging time is obtained as the current remaining capacity corresponding to the second preset charging time, and a third correction rate is determined according to the current remaining capacity and the respective corresponding preset remaining capacity thresholds and the displayed charging time at the current moment; a third correction time is calculated according to the actual charging time and the third correction rate; and the displayed charging time at the current moment is corrected according to the third correction time to obtain a third corrected remaining time.

[0105] In some embodiments of the present application, the third correction module 204 is further used to obtain multiple second preset displayed charging times and their corresponding preset remaining capacity thresholds; obtain the remaining capacity of the power battery when the displayed charging time is the second preset displayed charging time as the current remaining capacity corresponding to the second preset charging time, and determine a third correction rate according to the current remaining capacity and the corresponding preset remaining capacity thresholds and the displayed charging time at the current moment; calculate the third correction time according to the actual charging time and the third correction rate; correct the displayed charging time at the current moment according to the third correction time to obtain the third corrected remaining time.

[0106] In some embodiments of the present application, the second correction module 203 is further used to determine the ratio of the current actual charging current to the current requested charging current as the second correction rate when the current difference is greater than a preset current threshold; when the current difference is less than or equal to the preset current threshold, determine the preset first correction rate as the second correction rate; when the maximum single cell voltage corresponding to the first preset display charging time is greater than a preset voltage threshold, determine the preset fourth correction rate as the second correction rate; when the maximum single cell voltage corresponding to the first preset display charging time is less than or equal to the preset voltage threshold, determine the second correction rate according to the display charging time and the first preset display charging time.

[0107] In some embodiments of the present application, the device for correcting the remaining charging time further includes:

[0108] A calculation module, used to obtain a time difference between the displayed charging time corresponding to the current moment and the first corrected remaining time corresponding to the current moment;

[0109] The modification module is used to modify the displayed charging time to the first corrected remaining time when the time difference is greater than a preset time threshold.

[0110] In some embodiments of the present application, the third correction module 204 is further used to use the remaining capacity of the power battery when the displayed charging time is the first preset charging minutes as the first remaining capacity corresponding to the first preset charging minutes; determine the third correction rate according to the first remaining capacity, the first preset capacity threshold and the displayed charging time corresponding to the current moment; use the remaining capacity of the power battery when the displayed charging time is the second preset charging minutes as the second remaining capacity corresponding to the second preset charging minutes; determine the third correction rate according to the second remaining capacity, the second preset capacity threshold and the displayed charging time corresponding to the current moment.

[0111] In some embodiments of the present application, the third correction module 204 is further used to determine the third correction rate based on the displayed charging time and the first preset displayed charging time when the first remaining capacity is less than the first preset capacity threshold; when the first remaining capacity is greater than or equal to the first preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate; or, when the displayed charging time is greater than the first preset charging minutes, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate.

[0112] In some embodiments of the present application, the third correction module 204 is further used to determine the ratio of the displayed charging time to the first preset charging minutes as the third correction rate when the second remaining capacity is less than the second preset capacity threshold; when the second remaining capacity is greater than or equal to the second preset capacity threshold, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate; or, when the displayed charging time is greater than the second preset charging minutes, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate.

[0113] The embodiment of the present application further provides a battery system, which integrates any one of the remaining charging time correction devices provided in the embodiment of the present application, and the battery system includes:

[0114] one or more processors;

[0115] Memory; and

[0116] One or more applications, wherein the one or more applications are stored in the memory and are configured to be executed by the processor to perform the steps of the method for correcting the remaining charging time described in any of the embodiments of the method for correcting the remaining charging time.

[0117] The present application also provides a battery system that integrates any of the remaining charging time correction devices provided in the present application. Figure 3 As shown, it shows a schematic diagram of the structure of the battery system involved in the embodiment of the present application, specifically:

[0118] The battery system may include one or more processors 301 of processing cores, one or more computer-readable storage media memories 302, a power source 303, an input unit 304 and other components. Those skilled in the art will appreciate that Figure 3 The battery system structure shown in the figure does not constitute a limitation on the battery system, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0119] The processor 301 is the control center of the battery system. It uses various interfaces and lines to connect various parts of the entire battery system. It executes various functions of the battery system and processes data by running or executing software programs and / or modules stored in the memory 302, and calling data stored in the memory 302, so as to monitor the battery system as a whole. Optionally, the processor 301 may include one or more processing cores; preferably, the processor 301 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 301.

[0120] The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and data processing by running the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the battery system, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0121] The battery system also includes a power supply 303 for supplying power to each component. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, so that the power management system can manage charging, discharging, power consumption and other functions. The power supply 303 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components.

[0122] The battery system may further include an input unit 304, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0123] Although not shown, the battery system may also include a display unit, etc., which will not be described in detail here. Specifically in this embodiment, the processor 301 in the battery system will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302 to implement various functions, as follows:

[0124] Using the remaining charging time displayed in real time on the battery system of the electric vehicle as the displayed charging time at the current moment, wherein the battery system includes a power battery;

[0125] In the first charging period, the displayed charging time at the current moment is corrected according to the preset first correction rate and the actual charging time to obtain a first corrected remaining time;

[0126] The first corrected remaining time at the end of the first charging period is used as the displayed charging time at the start of the second charging period. In the second charging period, the displayed charging time at the current moment is corrected according to the second correction rate and the actual charging time to obtain the second corrected remaining time. The second correction rate is determined according to the current information and the voltage information of the power battery. The second charging period is after the first charging period.

[0127] The second corrected remaining time at the end of the second charging period is used as the displayed charging time at the beginning of the third charging period. In the third charging period, the displayed charging time at the current moment is corrected according to the third correction rate and the actual charging time to obtain the third corrected remaining time. The third correction rate is determined based on the remaining battery capacity of the power battery. The third charging period is after the second charging period.

[0128] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0129] To this end, an embodiment of the present application provides a computer-readable storage medium, which may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in any of the methods for correcting the remaining charging time provided in the embodiments of the present application. For example, the computer program may be loaded by a processor to execute the following steps:

[0130] Using the remaining charging time displayed in real time on the battery system of the electric vehicle as the displayed charging time at the current moment, wherein the battery system includes a power battery;

[0131] In the first charging period, the displayed charging time at the current moment is corrected according to the preset first correction rate and the actual charging time to obtain a first corrected remaining time;

[0132] The first corrected remaining time at the end of the first charging period is used as the displayed charging time at the start of the second charging period. In the second charging period, the displayed charging time at the current moment is corrected according to the second correction rate and the actual charging time to obtain the second corrected remaining time. The second correction rate is determined according to the current information and the voltage information of the power battery. The second charging period is after the first charging period.

[0133] The second corrected remaining time at the end of the second charging period is used as the displayed charging time at the beginning of the third charging period. In the third charging period, the displayed charging time at the current moment is corrected according to the third correction rate and the actual charging time to obtain the third corrected remaining time. The third correction rate is determined based on the remaining battery capacity of the power battery. The third charging period is after the second charging period.

[0134] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0135] In specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. The specific implementation of the above units or structures can refer to the previous method embodiments, which will not be repeated here.

[0136] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for correcting the remaining charging time, characterized in that: The method comprises: Using the remaining charging time displayed in real time on the battery system of the electric vehicle as the displayed charging time at the current moment, wherein the battery system includes a power battery; In the first charging period, the displayed charging time at the current moment is corrected according to the preset first correction rate and the actual charging time to obtain a first corrected remaining time; The first corrected remaining time at the end of the first charging period is used as the displayed charging time at the start of the second charging period. In the second charging period, the displayed charging time at the current moment is corrected according to the second correction rate and the actual charging time to obtain the second corrected remaining time. The second correction rate is determined according to the current information and the voltage information of the power battery. The second charging period is after the first charging period. The second correction rate is determined as follows: Get the current actual charging current and the current requested charging current; When the current difference between the current actual charging current and the current requested charging current is greater than a preset current threshold, determining a ratio of the current actual charging current to the current requested charging current as the second correction rate; When the current difference between the current actual charging current and the current requested charging current is less than or equal to the preset current threshold, determining the preset first correction rate as the second correction rate; When the maximum single cell voltage of the power battery is greater than a preset voltage threshold within the first preset display charging time, determining a preset fourth correction rate as the second correction rate; When the maximum single cell voltage of the power battery is less than or equal to a preset voltage threshold within the first preset displayed charging time, determining the second correction rate according to the displayed charging time and the first preset displayed charging time; The second corrected remaining time at the end of the second charging period is used as the displayed charging time at the beginning of the third charging period. In the third charging period, the displayed charging time at the current moment is corrected according to the third correction rate and the actual charging time to obtain the third corrected remaining time. The third correction rate is determined based on the remaining battery capacity of the power battery. The third charging period is after the second charging period.

2. The method for correcting the remaining charging time according to claim 1, characterized in that: The step of correcting the displayed charging time at the current moment according to the second correction rate and the actual charging time to obtain the second corrected remaining time includes: Determine a second correction rate according to at least one of a current difference between the current actual charging current and the current requested charging current and a maximum single cell voltage of the power battery within a first preset display charging time; Calculate the second correction time according to the actual charging time and the second correction rate; The displayed charging time at the current moment is corrected according to the second corrected time to obtain a second corrected remaining time.

3. The method for correcting the remaining charging time according to claim 1, characterized in that: The step of correcting the displayed charging time at the current moment according to the third correction rate and the actual charging time to obtain the third corrected remaining time includes: Obtaining a plurality of second preset display charging times and respective corresponding preset remaining capacity thresholds; acquiring the remaining capacity of the power battery when the displayed charging time is the second preset displayed charging time as the current remaining capacity corresponding to the second preset charging time, and determining a third correction rate according to the current remaining capacity and the corresponding preset remaining capacity thresholds and the displayed charging time at the current moment; Calculate a third correction time according to the actual charging time and the third correction rate; The displayed charging time at the current moment is corrected according to the third corrected time to obtain a third corrected remaining time.

4. The method for correcting the remaining charging time according to claim 1, characterized in that: After determining the ratio of the current actual charging current to the current requested charging current as the second correction rate when the current difference is greater than the preset current threshold, the method further includes: Obtaining a time difference between a displayed charging time corresponding to a current moment and a first corrected remaining time corresponding to the current moment; When the time difference is greater than a preset time threshold, the displayed charging time is modified to the first corrected remaining time.

5. The method for correcting the remaining charging time according to claim 3, characterized in that: The plurality of second preset display charging times include a first preset charging minutes and a second preset charging minutes, the preset remaining capacity threshold includes a first preset capacity threshold and a second preset capacity threshold, the preset remaining capacity threshold corresponding to the first preset charging minutes is the first preset capacity threshold, the preset remaining capacity threshold corresponding to the second preset charging minutes is the second preset capacity threshold, and the first preset charging minutes is greater than the second preset charging minutes; The determining of the third correction rate according to the current remaining capacity and the corresponding preset remaining capacity thresholds and the displayed charging time corresponding to the current moment includes: taking the remaining capacity of the power battery when the displayed charging time is the first preset number of charging minutes as the first remaining capacity corresponding to the first preset number of charging minutes; determining the third correction rate according to the first remaining capacity, the first preset capacity threshold and the displayed charging time corresponding to the current moment; The remaining capacity of the power battery when the displayed charging time is the second preset charging minutes is used as the second remaining capacity corresponding to the second preset charging minutes; The third correction rate is determined according to the second remaining capacity, the second preset capacity threshold, and the displayed charging time corresponding to the current moment.

6. The method for correcting the remaining charging time according to claim 5, characterized in that: The determining the third correction rate according to the first remaining capacity, the first preset capacity threshold and the displayed charging time corresponding to the current moment includes: When the first remaining capacity is less than the first preset capacity threshold, determining the third correction rate according to the displayed charging time and the first preset displayed charging time; When the first remaining capacity is greater than or equal to the first preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate; or, When the displayed charging time is greater than the first preset number of minutes of charging, the ratio of the displayed charging time to the first preset number of minutes of charging is determined as the third correction rate.

7. The method for correcting the remaining charging time according to claim 5, characterized in that: The determining the third correction rate according to the second remaining capacity, the second preset capacity threshold and the displayed charging time corresponding to the current moment includes: When the second remaining capacity is less than the second preset capacity threshold, the ratio of the displayed charging time to the first preset charging minutes is determined as the third correction rate; When the second remaining capacity is greater than or equal to the second preset capacity threshold, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate; or, When the displayed charging time is greater than the second preset charging minutes, the ratio of the displayed charging time to the second preset charging minutes is determined as the third correction rate.

8. A battery system, characterized in that: The battery system comprises: one or more processors; Memory; and One or more application programs, wherein the one or more application programs are stored in the memory and are configured to be executed by the processor to implement the method for correcting the remaining charging time according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in the method for correcting the remaining charging time as claimed in any one of claims 1 to 7.

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