Method, device, medium, and electronic device for determining remaining charging time

Abstract

The present application discloses a method, device, medium, and electronic device for determining the remaining charging time, which are applied to a battery. The method includes: in response to establishing a charging connection with a target charging pile, obtaining first relationship data, second relationship data, and charging pile charging parameters of the target charging pile, wherein the first relationship data and the second relationship data are established based on the historical charging data of the battery, the first relationship data representing the relationship between the battery temperature, the remaining battery charge, and the battery temperature rise rate, and the second relationship data representing the relationship between the battery temperature, the remaining battery charge, and the battery requested current; obtaining the current battery temperature and the current remaining charge of the battery; and determining the remaining charging time of the battery based on the first relationship data, the second relationship data, the charging pile charging parameters, the current battery temperature, and the current remaining charge. The present application can improve the accuracy of estimating the remaining charging time of the battery.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular, to a method, device, medium, and electronic device for determining remaining charging time. Background Art

[0002] The remaining charging time of a battery is one of the important indicators of battery charging management technology. It is mainly affected by battery parameters, nonlinear characteristics of the charging process and environmental factors, making it difficult to accurately calculate the remaining charging time.

[0003] When estimating the remaining charging time, the battery temperature rise rate is obtained by looking up the table, and the remaining charging time is estimated based on the battery temperature rise rate. However, the battery temperature rise rate obtained by looking up the table is a fixed value. After the battery ages, the battery temperature rise rate during the actual charging process does not match the battery temperature rise rate obtained by looking up the table, resulting in low accuracy in the remaining charging time estimation. Summary of the Invention

[0004] Embodiments of the present application provide a method, device, medium, and electronic device for determining the remaining charging time, which are used to solve the technical problem that the battery temperature rise rate during the actual charging process is inconsistent with the battery temperature rise rate obtained by looking up the table, resulting in low accuracy in the remaining charging time estimation.

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

[0006] According to a first aspect of the present application, a method for determining remaining charging time is provided, which is applied to a battery, and the method includes:

[0007] In response to establishing a charging connection with a target charging pile, obtaining first relationship data, second relationship data, and charging pile charging parameters of the target charging pile, wherein the first relationship data and the second relationship data are established based on historical charging data of the target charging pile charging the battery, the first relationship data represents a relationship between battery temperature, battery remaining capacity, and battery temperature rise rate, and the second relationship data represents a relationship between battery temperature, battery remaining capacity, and battery requested current;

[0008] Obtaining the current battery temperature of the battery;

[0009] The remaining charging time of the battery is determined according to the first relationship data, the second relationship data, the charging parameters of the charging pile and the current battery temperature.

[0010] In some embodiments of the present application, based on the aforementioned solution, determining the remaining charging time of the battery according to the first relationship data, the second relationship data, the charging parameters of the charging pile, and the current battery temperature includes:

[0011] Dividing the temperature range by using the current battery temperature as a starting point and a preset unit temperature as an interval temperature to obtain a plurality of temperature ranges from low to high, and taking the first temperature range as the current temperature range;

[0012] Determine, based on the first relationship data, the second relationship data, and the charging parameters of the charging pile, the remaining power at the endpoint corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval;

[0013] Determine whether the endpoint remaining power is greater than or equal to the preset remaining power; if so, use the current temperature interval as the endpoint temperature interval; if not, update the current temperature interval to the next temperature interval, and return to the step of determining the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time of the current temperature interval based on the first relationship data, the second relationship data, and the charging parameters of the charging pile;

[0014] The temperature interval from the first temperature interval to the end temperature interval is taken as the target temperature interval, and the charging time in the target temperature interval is calculated by superposition to obtain the remaining charging time.

[0015] In some embodiments of the present application, based on the aforementioned solution, determining the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval based on the first relationship data, the second relationship data, and the charging parameters of the charging pile includes:

[0016] Determine the remaining power at the starting point of the current temperature range;

[0017] According to the starting remaining power and the starting temperature of the current temperature interval, obtaining the starting temperature rise rate of the current temperature interval from the first relationship data, and obtaining the starting requested current of the current temperature interval from the second relationship data;

[0018] The remaining power at the endpoint corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval are determined according to the starting temperature rise rate, the starting requested current and the charging parameters of the charging pile.

[0019] In some embodiments of the present application, based on the aforementioned solution, the charging pile charging parameters include a charging coefficient and a maximum charging current, and determining the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval based on the starting temperature rise rate, the starting requested current, and the charging pile charging parameters includes:

[0020] Determining a starting point charging current for the current temperature range according to the starting point requested current, the charging coefficient, and the maximum charging current;

[0021] Correcting the starting point temperature rise rate according to the starting point charging current and the starting point request current to obtain a corrected temperature rise rate;

[0022] Determining a charging time for the current temperature range based on the unit temperature and the corrected temperature rise rate;

[0023] The endpoint remaining power corresponding to the endpoint temperature of the temperature range is determined according to the starting point remaining power, the charging time, the starting point charging current, and the battery capacity of the battery.

[0024] In some embodiments of the present application, based on the aforementioned solution, the step of correcting the starting temperature rise rate according to the starting charging current and the starting request current to obtain the corrected temperature rise rate includes:

[0025] Obtaining a correction coefficient according to the square of the ratio of the starting point charging current to the starting point request current;

[0026] The corrected temperature rise rate is obtained according to the product of the correction coefficient and the starting point temperature rise rate.

[0027] In some embodiments of the present application, based on the aforementioned solution, determining the starting charging current for the current temperature range according to the starting requested current, the charging coefficient, and the maximum charging current includes:

[0028] Obtaining a modified requested current according to a product of the starting point requested current and the charging coefficient;

[0029] If the modified requested current is greater than or equal to the maximum charging current, using the maximum charging current as the starting charging current;

[0030] If the corrected requested current is less than the maximum charging current, the corrected requested current is used as the starting charging current.

[0031] In some embodiments of the present application, based on the aforementioned solution, the historical charging data includes historical charging current, historical requested current, historical battery temperature, historical remaining power, and historical temperature rise rate for multiple historical charging operations of the battery, and the method further includes:

[0032] determining the first relationship data according to the historical battery temperature, the historical remaining power, and the historical temperature rise rate;

[0033] determining the second relationship data according to the historical battery temperature, the historical remaining power, and the historical requested current;

[0034] If at least two historical request currents for charging the battery are different and the historical charging currents are the same, the historical charging current is used as the maximum charging current; otherwise, a preset current value is used as the maximum charging current;

[0035] The historical request currents and historical charging currents of the battery for multiple historical charges are different, and a current ratio of the historical request current to the historical charging current is determined. When at least two of the current ratios are the same, the corresponding current ratios are used as the charging coefficient; otherwise, a preset coefficient value is used as the charging coefficient, and the preset coefficient value is less than or equal to 1.

[0036] According to a second aspect of the present application, a device for determining remaining charging time is provided, which is applied to a battery, and the device includes:

[0037] a first acquiring unit, in response to establishing a charging connection with a target charging pile, acquiring first relationship data, second relationship data, and charging pile charging parameters of the target charging pile, wherein the first relationship data and the second relationship data are established based on historical charging data of the target charging pile charging the battery, the first relationship data represents a relationship between battery temperature, battery remaining capacity, and battery temperature rise rate, and the second relationship data represents a relationship between battery temperature, battery remaining capacity, and battery requested current;

[0038] a second acquiring unit, configured to acquire a current battery temperature of the battery;

[0039] The first determining unit determines the remaining charging time of the battery according to the first relationship data, the second relationship data, the charging parameters of the charging pile, and the current battery temperature.

[0040] In some embodiments of the present application, based on the aforementioned solution, the first determining unit is configured as follows:

[0041] a first dividing unit, which divides the battery into intervals using the current battery temperature as a starting point and a preset unit temperature as an interval temperature to obtain a plurality of temperature intervals from low to high, and uses the first of the temperature intervals as the current temperature interval;

[0042] a second determining unit, determining, based on the first relationship data, the second relationship data, and the charging parameters of the charging pile, an endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and a charging time for the current temperature interval;

[0043] a first judgment unit, determining whether the endpoint remaining power is greater than or equal to a preset remaining power; if so, using the current temperature interval as the endpoint temperature interval; if not, updating the current temperature interval to the next temperature interval, and returning to the step of determining the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time of the current temperature interval based on the first relationship data, the second relationship data, and the charging parameters of the charging pile;

[0044] The first obtaining unit takes the temperature interval from the first temperature interval to the end temperature interval as the target temperature interval, and calculates the charging time in the target temperature interval in a superimposed manner to obtain the remaining charging time.

[0045] In some embodiments of the present application, based on the aforementioned solution, the second determining unit is configured as follows:

[0046] a third determining unit, determining the remaining power at the starting point of the current temperature range;

[0047] a third acquiring unit, configured to acquire, based on the starting remaining power and the starting temperature of the current temperature interval, a starting temperature rise rate of the current temperature interval from the first relationship data, and acquire a starting requested current of the current temperature interval from the second relationship data;

[0048] The fourth determining unit determines the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time of the current temperature interval according to the starting temperature rise rate, the starting requested current and the charging parameters of the charging pile.

[0049] In some embodiments of the present application, based on the aforementioned solution, the charging pile charging parameters include a charging coefficient and a maximum charging current, and the fourth determining unit is configured as follows:

[0050] a fifth determining unit, configured to determine a starting charging current for the current temperature range according to the starting requested current, the charging coefficient, and the maximum charging current;

[0051] a second obtaining unit, which corrects the starting point temperature rise rate according to the starting point charging current and the starting point request current to obtain a corrected temperature rise rate;

[0052] a sixth determining unit, configured to determine a charging time in the current temperature range according to the unit temperature and the corrected temperature rise rate;

[0053] A seventh determining unit determines the endpoint remaining power corresponding to the endpoint temperature of the temperature interval according to the starting remaining power, the charging time, the starting charging current, and the battery capacity of the battery.

[0054] In some embodiments of the present application, based on the aforementioned solution, the sixth determining unit is configured as follows:

[0055] a third obtaining unit, obtaining a correction coefficient according to the square of the ratio of the starting point charging current to the starting point request current;

[0056] A fourth obtaining unit obtains the corrected temperature rise rate according to the product of the correction coefficient and the starting point temperature rise rate.

[0057] In some embodiments of the present application, based on the aforementioned solution, the fifth determining unit is configured as follows:

[0058] a fifth obtaining unit, configured to obtain a modified requested current according to a product of the starting point requested current and the charging coefficient;

[0059] First, as a unit, if the modified requested current is greater than or equal to the maximum charging current, the maximum charging current is used as the starting charging current;

[0060] Second, as a unit, if the modified requested current is less than the maximum charging current, the modified requested current is used as the starting charging current.

[0061] In some embodiments of the present application, based on the aforementioned solution, the historical charging data includes historical charging current, historical requested current, historical battery temperature, historical remaining power, and historical temperature rise rate for multiple historical charging operations of the battery, and the device further includes:

[0062] an eighth determining unit, configured to determine the first relationship data according to the historical battery temperature, the historical remaining battery capacity, and the historical temperature rise rate;

[0063] a ninth determining unit, configured to determine the second relationship data according to the historical battery temperature, the historical remaining power, and the historical requested current;

[0064] thirdly, as a unit, if at least two historical request currents for charging the battery are different and the historical charging currents are the same, the historical charging current is used as the maximum charging current; otherwise, a preset current value is used as the maximum charging current;

[0065] Fourth, as a unit, the historical request currents for charging the battery multiple times in the past are different and the historical charging currents are different, and the current ratio of the historical request current to the historical charging current is determined. When at least two of the current ratios are the same, the corresponding current ratio is used as the charging coefficient; otherwise, a preset coefficient value is used as the charging coefficient, and the preset coefficient value is less than or equal to 1.

[0066] According to the third aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored, characterized in that the computer program includes executable instructions, and when the executable instructions are executed by a processor, the method described in any embodiment of the first aspect of the present application is implemented.

[0067] According to the fourth aspect of the present application, an electronic device is provided, comprising: one or more processors; and a memory for storing executable instructions of the processors, wherein when the executable instructions are executed by the one or more processors, the one or more processors implement the method described in any embodiment of the first aspect of the present application.

[0068] The beneficial effects of this application are as follows:

[0069] The battery temperature rise rate and the battery requested current are determined based on the first relationship data and the second relationship data. The battery requested current and the battery temperature rise rate are consistent with the battery aging condition. The remaining charging time determined thereby is more accurate than the remaining charging time determined based on a fixed battery temperature rise rate.

[0070] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, explaining the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0072] Figure 1 A flow chart of a method for determining the remaining charging time in an embodiment of the present application is shown;

[0073] Figure 2 A block diagram of a device for determining remaining charging time in an embodiment of the present application is shown;

[0074] Figure 3 A schematic diagram showing a computer-readable storage medium in an embodiment of the present application is shown;

[0075] Figure 4 A schematic diagram showing the system structure of an electronic device in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0077] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0078] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0079] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0080] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0081] To better understand the embodiments of the present application, the existing method for determining the remaining battery charging time is described as follows:

[0082] After the battery establishes a charging connection with the charging pile, the battery management system (BMS) collects the first battery temperature and calculates the first battery remaining capacity. Based on the first battery temperature and the first battery remaining capacity, the BMS retrieves a charging map table to obtain a first charging request current. Based on the first battery temperature and the first battery remaining capacity, the BMS retrieves a temperature rise rate table to obtain a first temperature rise rate. The BMS then calculates a first time for the battery to rise 1°C from the first battery temperature and a first charging capacity, where the first time is 1 / the first temperature rise rate. The first charging capacity is the product of the first requested current and the first time. The first capacity ratio is the ratio of the first charging capacity to the battery capacity. The sum of the first battery temperature and 1°C is determined as the second battery temperature. The sum of the first remaining capacity and the first capacity percentage is used as the second remaining capacity.

[0083] Determine whether the second remaining capacity is greater than the target remaining capacity. If not, query a charging map table according to the second battery temperature and the second battery remaining capacity to obtain a second charging request current, and query a temperature rise rate table according to the second battery temperature and the second battery remaining capacity to obtain a second temperature rise rate. Calculate a second time and a second charging capacity for the battery to rise 1°C from the second battery temperature, where the second time is 1 / the second temperature rise rate, the second charging capacity is the product of the second requested current and the second time, and the second capacity ratio is the ratio of the second charging capacity to the battery capacity. Determine the sum of the second battery temperature and 1°C as the third battery temperature. Use the sum of the second remaining capacity and the second capacity percentage as the third remaining capacity. Determine whether the third remaining capacity is greater than the target remaining capacity. If not, calculate an Nth remaining capacity by analogy. If the Nth remaining capacity is greater than or equal to the target remaining capacity, then the remaining charging time is the first time + the second time + ... + the Nth time, where N is a positive integer greater than or equal to 2.

[0084] Currently, the temperature rise rates in the temperature rise rate table are fixed values. After being calibrated in the laboratory, they are written into the BMS (battery management system) software without modification.

[0085] Figure 1 A flow chart showing a method for determining the remaining charging time in an embodiment of the present application is shown. Figure 1 , provides a method for determining the remaining charging time, which is applied to a battery, which may be a vehicle battery, and is described in detail as follows:

[0086] In step S1, in response to establishing a charging connection with a target charging pile, first relationship data, second relationship data, and charging pile charging parameters of the target charging pile are obtained, wherein the first relationship data and the second relationship data are established based on historical charging data of the target charging pile charging the battery, the first relationship data represents the relationship between battery temperature, battery remaining capacity, and battery temperature rise rate, and the second relationship data represents the relationship between battery temperature, battery remaining capacity, and battery requested current. The battery requested current can be understood as the current requested by the battery management system from the charging pile.

[0087] In this way, compared with the first relationship data and the second relationship data determined based on the historical charging data of the battery by other charging piles, the first relationship data and the second relationship data established based on the historical charging data of the battery by the target charging pile are more consistent with the charging status of the battery by the target charging pile, thereby ensuring the accuracy of the estimation of the remaining charging time.

[0088] In step S2, the current battery temperature of the battery is obtained.

[0089] In step S3, the remaining charging time of the battery is determined according to the first relationship data, the second relationship data, the charging parameters of the charging pile, and the current battery temperature.

[0090] In this way, the first relationship data and the second relationship data are related to the historical charging data, that is, they are associated with the battery aging condition, which is more in line with the actual charging condition of the battery. When the remaining charging time is determined by the battery temperature rise rate obtained by looking up the table, the battery temperature rise rate is a fixed value, that is, it is not associated with the battery aging condition. It can be seen that the former is more accurate in determining the remaining charging time.

[0091] In some embodiments, determining the remaining charging time of the battery based on the first relationship data, the second relationship data, the charging parameters of the charging pile and the current battery temperature includes: dividing the temperature interval with the current battery temperature as the starting point and the preset unit temperature as the interval temperature to obtain multiple temperature intervals from low to high, and taking the first temperature interval as the current temperature interval; determining the terminal remaining power corresponding to the terminal temperature of the current temperature interval and the charging time of the current temperature interval based on the first relationship data, the second relationship data and the charging parameters of the charging pile; judging whether the terminal remaining power is greater than or equal to the preset remaining power, if so, taking the current temperature interval as the terminal temperature interval, if not, updating the current temperature interval to the next temperature interval, and returning to execute the step of determining the terminal remaining power corresponding to the terminal temperature of the current temperature interval and the charging time of the current temperature interval based on the first relationship data, the second relationship data and the charging parameters of the charging pile; taking the temperature interval from the first temperature interval to the terminal temperature interval as the target temperature interval, and superimposing and calculating the charging time of the target temperature interval to obtain the remaining charging time. The starting temperature of the first temperature interval is the current battery temperature, the end temperature of the current temperature interval is the starting temperature of the next temperature interval, and the preset remaining power is the remaining power that the battery needs to reach, corresponding to the target remaining power in the prior art.

[0092] For example, the current battery temperature is 20°C, the unit temperature is 1°C, the preset remaining power is 80%, and the temperature intervals from low to high are 20-21°C, 21-22°C, 22-23°C..., the current temperature interval is the temperature interval starting from 20-21°C, the first temperature interval is 20-21°C, the second temperature interval is 21-22°C, the second temperature interval is the temperature interval next to the first temperature interval, when the current temperature interval is the first temperature interval, the next temperature interval is the second temperature interval, if the end point of the fourth temperature interval (23-24°C) The terminal remaining power corresponding to the temperature (24°C) is 75%, and the terminal remaining power corresponding to the terminal temperature (25°C) of the fifth temperature interval (24-25°C) is 81%. That is, starting from the fifth temperature interval, the terminal remaining power is greater than the preset remaining power. The fifth temperature interval is the terminal temperature interval, and the first temperature interval to the fifth temperature interval are the target temperature interval. The charging time of the target temperature interval is superimposed and calculated, that is, the charging time of the first temperature interval to the fifth temperature interval is superimposed and calculated to obtain the remaining charging time. If the charging time of the Mth temperature interval is defined as T M, M is a positive integer greater than or equal to 1, and the remaining charging time T=T 1+ T 2+ T 3+ T 4+ T5.

[0093] In some embodiments, determining the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval based on the first relationship data, the second relationship data, and the charging parameters of the charging pile includes: determining the starting point remaining power of the current temperature interval; obtaining the starting point temperature rise rate of the current temperature interval from the first relationship data based on the starting point remaining power and the starting point temperature of the current temperature interval, and obtaining the starting point requested current of the current temperature interval from the second relationship data; and determining the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval based on the starting point temperature rise rate, the starting point requested current, and the charging parameters of the charging pile. The starting point remaining power is the remaining power corresponding to the starting point temperature of the current temperature interval, the starting point temperature rise rate is the battery temperature rise rate corresponding to the starting point temperature and the starting point remaining power of the current temperature interval, and the starting point requested current is the battery requested current corresponding to the starting point temperature and the starting point remaining power of the current temperature interval.

[0094] In some embodiments, determining the starting remaining power of the current temperature interval includes: obtaining the current remaining power corresponding to the current battery temperature; when the current temperature interval is the first temperature interval, using the current remaining power as the starting remaining power; when the current temperature interval is not the first temperature interval, determining the previous temperature interval of the current temperature interval, and using the end point remaining power corresponding to the end point temperature of the previous temperature interval as the starting point remaining power, wherein the end point temperature of the previous temperature interval is equal to the starting point temperature of the current temperature interval.

[0095] In some embodiments, the charging pile charging parameters include a charging coefficient and a maximum charging current. Determining the endpoint remaining capacity corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval based on the starting temperature rise rate, the starting requested current, and the charging pile charging parameters includes: determining the starting charging current for the current temperature interval based on the starting requested current, the charging coefficient, and the maximum charging current; correcting the starting temperature rise rate based on the starting charging current and the starting requested current to obtain a corrected temperature rise rate; determining the charging time for the current temperature interval based on the unit temperature and the corrected temperature rise rate; and determining the endpoint remaining capacity corresponding to the endpoint temperature of the temperature interval based on the starting remaining capacity, the charging time, the starting charging current, and the battery capacity of the battery. The starting charging current can be understood as the actual charging current corresponding to the starting temperature and starting remaining capacity of the temperature interval, and the maximum charging current can be understood as the maximum actual charging current. The actual charging current is the actual current when the charging pile charges the battery.

[0096] Exemplarily, the battery management system sends a request signal for a starting current to the target charging pile. After receiving the request signal, the target charging pile charges the battery according to the starting charging current.

[0097] In this way, the starting temperature rise rate is corrected to obtain the corrected temperature rise rate, which is more consistent with the actual temperature rise rate of the battery, and is conducive to accurately estimating the remaining charging time.

[0098] In some embodiments, correcting the starting temperature rise rate based on the starting charging current and the starting requested current to obtain a corrected temperature rise rate includes: obtaining a correction coefficient based on the square of the ratio of the starting charging current to the starting requested current; and obtaining the corrected temperature rise rate based on the product of the correction coefficient and the starting temperature rise rate. The correction coefficient is related to the square of the current, which can be understood as being related to battery power, which in turn is related to battery temperature. This correction coefficient can better correct the starting temperature rise rate, ensuring that the corrected temperature rise rate more closely matches the actual temperature rise rate, thereby increasing the accuracy of the remaining charging time estimate. The correction coefficient can also be a preset correction value.

[0099] For example, the starting charging current is I c , the starting point request current is I q , the correction coefficient The corrected temperature rise rate V x =K1×V q , V q is the starting temperature rise rate.

[0100] In some embodiments, determining the starting charging current of the current temperature range based on the starting request current, the charging coefficient and the maximum charging current includes: obtaining a corrected request current based on the product of the starting request current and the charging coefficient; if the corrected request current is greater than or equal to the maximum charging current, using the maximum charging current as the starting charging current; if the corrected request current is less than the maximum charging current, using the corrected request current as the starting charging current.

[0101] For example, the charging coefficient is K2, and the maximum charging current is I z , the starting point request current is I q , the starting charging current is I c =min(I z , K2×I q ).

[0102] In some embodiments, the historical charging data includes historical charging current, historical request current, historical battery temperature, historical remaining capacity, and historical temperature rise rate of multiple historical charging operations of the battery. The method further includes: determining the first relationship data based on the historical battery temperature, the historical remaining capacity, and the historical temperature rise rate; determining the second relationship data based on the historical battery temperature, the historical remaining capacity, and the historical request current; if the historical request currents for charging the battery for at least two times are different and the historical charging currents are the same, using the historical charging current as the maximum charging current; otherwise, using a preset current value as the maximum charging current; and if the historical request currents for charging the battery for multiple times are different and the historical charging currents are different, determining a current ratio between the historical request current and the historical charging current; if at least two current ratios are the same, using the corresponding current ratio as the charging coefficient; otherwise, using a preset coefficient value as the charging coefficient, the preset coefficient value being less than or equal to 1. The preset current value is greater than or equal to 1000A, that is, the preset current value is a current value greater than the maximum charging current of an existing charging pile.

[0103] Exemplarily, the preset current value is 1000A, and the preset coefficient value is 1. The combinations of historical request currents and historical charging currents are 100A, 90A, 90A, 90A, 80A, and 80A. The historical request currents for charging the battery for at least two times are different and the historical charging currents are the same. The same historical charging current of 90A is used as the maximum charging current. The combinations of historical request currents and historical charging currents are 100A, 90A, 90A, 72A, 80A, and 64A. That is, there is no situation where the historical request currents for charging the battery for at least two times are different and the historical charging currents are the same. The preset current value 1 is set. 000A is used as the maximum charging current; the combinations of historical request currents and historical charging currents are 100A, 90A, 90A, 90A, 80A, 80A, and the current ratios are 0.9, 1, and 1. The same current ratio 1 is used as the charging coefficient. The combinations of historical request currents and historical charging currents are 100A, 90A, 99A, 90A, 80A, and 80A, and the current ratios are 0.9, 10 / 11, and 1. That is, there is no case where at least two current ratios are the same, and the preset coefficient value 1 is used as the charging coefficient.

[0104] It should be noted that when the target charging pile charges the battery normally, the historical request current is greater than or equal to the historical charging current, the starting point request current is greater than or equal to the starting point charging current, the starting point request current is less than the starting point charging current, or the historical request current is less than the historical charging current, it is necessary to inspect the battery or the target charging pile to determine whether the battery or the target charging pile has a fault.

[0105] In some embodiments, when the target charging pile has charged the battery less than a preset number of times, the method further includes: obtaining a first current battery temperature, a first current remaining power, a first unit temperature, and a battery capacity; obtaining a first current requested current from a first preset relationship table and a first current temperature rise rate from a second preset relationship table based on the first current battery temperature and the first current remaining power; determining a first charging time based on a quotient of the first unit temperature and the first current temperature rise rate, the first charging time being the first charging time for the battery to rise from the first current battery temperature to the first unit temperature; determining a first product of the first charging time and the first requested current, and determining a first unit power based on a ratio of the first product to the battery capacity; determining a second remaining power based on the sum of the first current remaining power and the first unit power; and determining whether the first remaining power is greater than a preset remaining power. If so, superimposing the first charging time to an Nth charging time to obtain the remaining charging time. If not, calculating the Nth charging time and the Nth remaining power. If the Nth remaining power is greater than or equal to the preset remaining power, the step of superimposing the first charging time to the Nth charging time to obtain the remaining charging time is performed, where N is a positive integer greater than or equal to 1.

[0106] It should be noted that when the number of times the target charging pile charges the battery is less than the preset number of times, it can be understood that the remaining charging time is determined using the existing technology, and the preset number of times can be 4 times.

[0107] In the present application, the first relationship data corresponds to the temperature rise rate table of the prior art, and the second relationship data corresponds to the charging map table of the prior art. The battery temperature rise rate of the first relationship data is iterated according to the historical charging data, and the battery request current of the second relationship data is iterated according to the historical charging data, that is, the battery temperature rise rate and the battery request current are not fixed values. The battery temperature rise rate and the battery request current are determined according to the first relationship data and the second relationship data. The battery request current and the battery temperature rise rate are consistent with the battery aging condition. The remaining charging time determined in this way has a higher estimation accuracy than the remaining charging time determined according to the fixed battery temperature rise rate.

[0108] Figure 2 A block diagram of a device for determining the remaining charging time in an embodiment of the present application is shown. Figure 2 According to a second aspect of the present application, a device 100 for determining remaining charging time is provided, which is applied to a battery. The device includes:

[0109] A first acquiring unit 101, in response to establishing a charging connection with a target charging pile, acquires first relationship data, second relationship data, and charging pile charging parameters of the target charging pile, wherein the first relationship data and the second relationship data are established based on historical charging data of the target charging pile charging the battery, the first relationship data represents a relationship between battery temperature, battery remaining capacity, and battery temperature rise rate, and the second relationship data represents a relationship between battery temperature, battery remaining capacity, and battery requested current;

[0110] A second acquiring unit 102 acquires a current battery temperature of the battery;

[0111] The first determining unit 103 determines the remaining charging time of the battery according to the first relationship data, the second relationship data, the charging parameters of the charging pile, and the current battery temperature.

[0112] In some embodiments, the first determination unit is configured as: a first division unit, which divides the interval with the current battery temperature as the starting point and the preset unit temperature as the interval temperature to obtain multiple temperature intervals from low to high, and takes the first temperature interval as the current temperature interval; a second determination unit, which determines the terminal remaining power corresponding to the terminal temperature of the current temperature interval and the charging time of the current temperature interval according to the first relationship data, the second relationship data and the charging parameters of the charging pile; a first judgment unit, which judges whether the terminal remaining power is greater than or equal to the preset remaining power, and if so, takes the current temperature interval as the terminal temperature interval, and if not, updates the current temperature interval to the next temperature interval, and returns to execute the step of determining the terminal remaining power corresponding to the terminal temperature of the current temperature interval and the charging time of the current temperature interval according to the first relationship data, the second relationship data and the charging parameters of the charging pile; a first obtaining unit, which takes the temperature interval from the first temperature interval to the terminal temperature interval as the target temperature interval, and superimposes and calculates the charging time of the target temperature interval to obtain the charging remaining time.

[0113] In some embodiments, the second determination unit is configured as: a third determination unit, which determines the starting remaining power of the current temperature interval; a third acquisition unit, which acquires the starting temperature rise rate of the current temperature interval from the first relationship data and the starting temperature of the current temperature interval from the second relationship data according to the starting remaining power and the starting temperature of the current temperature interval; and acquires the starting requested current of the current temperature interval from the second relationship data; a fourth determination unit, which determines the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time of the current temperature interval according to the starting temperature rise rate, the starting requested current and the charging parameters of the charging pile.

[0114] In some embodiments, the charging parameters of the charging pile include a charging coefficient and a maximum charging current, and the fourth determination unit is configured as: a fifth determination unit, which determines the starting charging current of the current temperature range based on the starting request current, the charging coefficient and the maximum charging current; a second obtaining unit, which corrects the starting temperature rise rate according to the starting charging current and the starting request current to obtain a corrected temperature rise rate; a sixth determination unit, which determines the charging time of the current temperature range based on the unit temperature and the corrected temperature rise rate; and a seventh determination unit, which determines the endpoint remaining power corresponding to the endpoint temperature of the temperature range based on the starting remaining power, the charging time, the starting charging current and the battery capacity of the battery.

[0115] In some embodiments, the sixth determination unit is configured as: a third obtaining unit, which obtains a correction coefficient based on the square of the ratio of the starting charging current to the starting request current; and a fourth obtaining unit, which obtains the corrected temperature rise rate based on the product of the correction coefficient and the starting temperature rise rate.

[0116] In some embodiments, the fifth determination unit is configured as: a fifth obtaining unit, which obtains a corrected request current based on the product of the starting request current and the charging coefficient; a first as a unit, if the corrected request current is greater than or equal to the maximum charging current, the maximum charging current is used as the starting charging current; a second as a unit, if the corrected request current is less than the maximum charging current, the corrected request current is used as the starting charging current.

[0117] In some embodiments, the historical charging data includes historical charging current, historical request current, historical battery temperature, historical remaining power and historical temperature rise rate of multiple historical charging operations of the battery, and the device also includes: an eighth determination unit, determining the first relationship data based on the historical battery temperature, the historical remaining power and the historical temperature rise rate; a ninth determination unit, determining the second relationship data based on the historical battery temperature, the historical remaining power and the historical request current; a third unit, if the historical request currents for charging the battery at least twice are different and the historical charging currents are the same, the historical charging current is used as the maximum charging current; otherwise, a preset current value is used as the maximum charging current; a fourth unit, if the historical request currents for charging the battery multiple times are different and the historical charging currents are different, a current ratio of the historical request current to the historical charging current is determined; when at least two current ratios are the same, the corresponding current ratio is used as the charging coefficient; otherwise, a preset coefficient value is used as the charging coefficient, and the preset coefficient value is less than or equal to 1.

[0118] Based on the same inventive concept, as a third aspect, this application also provides a computer-readable storage medium storing a program product capable of implementing the aforementioned method for determining the remaining charging time. In some possible implementations, various aspects of this application may also be implemented in the form of a program product comprising program code. When the program product is executed on a terminal device, the program code is configured to cause the terminal device to execute the steps described in the "Exemplary Methods" section above according to various exemplary implementations of this application.

[0119] refer to Figure 3 As shown, a program product 200 for implementing the above method according to an embodiment of the present application is described. The program product 200 may be a portable compact disc read-only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present application is not limited thereto. In this document, a readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0120] The program product may be implemented in any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0121] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0122] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0123] The program code for performing the operations of the present application can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0124] As another aspect, the present application also provides an electronic device capable of implementing the above method.

[0125] Those skilled in the art will appreciate that various aspects of the present application can be implemented as systems, methods, or program products. Therefore, various aspects of the present application can be specifically implemented in the following forms: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation that combines hardware and software aspects, which may be collectively referred to herein as a "circuit," "module," or "system."

[0126] Refer to the following Figure 4 hereinafter, an electronic device 300 according to this embodiment of the present application is described. Figure 4 The electronic device 300 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0127] like Figure 4 As shown, electronic device 300 is implemented as a general-purpose computing device. Components of electronic device 300 may include, but are not limited to, the aforementioned at least one processing unit 310, the aforementioned at least one storage unit 320, and a bus 330 connecting various system components (including storage unit 320 and processing unit 310).

[0128] The storage unit stores program code, which can be executed by the processing unit 310, so that the processing unit 310 performs the steps described in the above "Example Method" section of this specification according to various exemplary embodiments of the present application.

[0129] The storage unit 320 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 321 and / or a cache memory unit 322 , and may further include a read-only memory unit (ROM) 323 .

[0130] The storage unit 320 may also include a program / utility 324 having a set (at least one) of program modules 325, such program modules 325 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0131] Bus 330 may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0132] The electronic device 300 may also communicate with one or more external devices 400 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable a user to interact with the electronic device 300, and / or any device that enables the electronic device 300 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed through an input / output (I / O) interface 350. Furthermore, the electronic device 300 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 360. Figure 4 As shown, the network adapter 360 communicates with other modules of the electronic device 300 via the bus 330. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 300, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0133] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Furthermore, the functional units may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0134] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0135] The units described as separate components may or may not be physically separate, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0136] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, 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, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0137] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of the claims of the present application.

Claims

1. A method for determining the remaining charging time, characterized in that: Applied to a battery, the method comprises: In response to establishing a charging connection with a target charging pile, first relationship data, second relationship data, and charging pile charging parameters of the target charging pile are obtained, wherein the first relationship data and the second relationship data are established based on historical charging data of the target charging pile for charging the battery, the historical charging data including historical charging current, historical request current, historical battery temperature, historical remaining power, and historical temperature rise rate of multiple historical charging of the battery, the first relationship data representing the relationship between the battery temperature, the remaining battery power, and the battery temperature rise rate, the first relationship data being determined based on the historical battery temperature, the historical remaining power, and the historical temperature rise rate, the second relationship data representing the relationship between the battery temperature, the remaining battery power, and the battery request current, the second relationship data being determined based on the historical battery temperature, the historical remaining power, and the historical request current, and the charging pile charging parameters including a maximum charging current and a charging coefficient; The maximum charging current is determined as follows: If at least two historical request currents for charging the battery are different and the historical charging currents are the same, the historical charging current is used as the maximum charging current; otherwise, a preset current value is used as the maximum charging current; The charging coefficient is determined as follows: multiple times of charging the battery in the past with different historical request currents and different historical charging currents, determining a current ratio between the historical request currents and the historical charging currents, and if at least two of the current ratios are the same, using the corresponding current ratio as a charging coefficient; otherwise, using a preset coefficient value as the charging coefficient, where the preset coefficient value is less than or equal to 1; Obtaining the current battery temperature of the battery; The remaining charging time of the battery is determined according to the first relationship data, the second relationship data, the charging parameters of the charging pile and the current battery temperature.

2. The method for determining the remaining charging time according to claim 1, wherein: The determining the remaining charging time of the battery according to the first relationship data, the second relationship data, the charging parameters of the charging pile, and the current battery temperature includes: Dividing the temperature range by using the current battery temperature as a starting point and a preset unit temperature as an interval temperature to obtain a plurality of temperature ranges from low to high, and taking the first temperature range as the current temperature range; Determine, based on the first relationship data, the second relationship data, and the charging parameters of the charging pile, the remaining power at the endpoint corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval; Determine whether the endpoint remaining power is greater than or equal to the preset remaining power; if so, use the current temperature interval as the endpoint temperature interval; if not, update the current temperature interval to the next temperature interval, and return to the step of determining the endpoint remaining power corresponding to the endpoint temperature of the current temperature interval and the charging time of the current temperature interval based on the first relationship data, the second relationship data, and the charging parameters of the charging pile; The temperature interval from the first temperature interval to the end temperature interval is taken as the target temperature interval, and the charging time in the target temperature interval is calculated by superposition to obtain the remaining charging time.

3. The method for determining the remaining charging time according to claim 2, wherein: The determining, based on the first relationship data, the second relationship data, and the charging parameters of the charging pile, the remaining power at the endpoint corresponding to the endpoint temperature of the current temperature interval and the charging time for the current temperature interval includes: Determine the remaining power at the starting point of the current temperature range; According to the starting remaining power and the starting temperature of the current temperature interval, obtaining the starting temperature rise rate of the current temperature interval from the first relationship data, and obtaining the starting requested current of the current temperature interval from the second relationship data; The remaining power at the end point corresponding to the end point temperature of the current temperature interval and the charging time for the current temperature interval are determined according to the starting temperature rise rate, the starting point requested current and the charging parameters of the charging pile.

4. A method for determining the remaining charging time according to claim 3, characterized in that: The charging pile charging parameters include a charging coefficient and a maximum charging current. The determining, based on the starting temperature rise rate, the starting requested current, and the charging pile charging parameters, of the remaining power at the end point corresponding to the end point temperature of the current temperature interval and the charging time for the current temperature interval includes: Determining a starting point charging current for the current temperature range according to the starting point requested current, the charging coefficient, and the maximum charging current; Correcting the starting point temperature rise rate according to the starting point charging current and the starting point request current to obtain a corrected temperature rise rate; Determining a charging time for the current temperature range based on the unit temperature and the corrected temperature rise rate; The endpoint remaining power corresponding to the endpoint temperature of the temperature range is determined according to the starting point remaining power, the charging time, the starting point charging current, and the battery capacity of the battery.

5. The method for determining the remaining charging time according to claim 4, wherein: The step of correcting the starting point temperature rise rate according to the starting point charging current and the starting point request current to obtain a corrected temperature rise rate includes: Obtaining a correction coefficient according to the square of the ratio of the starting point charging current to the starting point request current; The corrected temperature rise rate is obtained according to the product of the correction coefficient and the starting point temperature rise rate.

6. A method for determining remaining charging time according to claim 4, characterized in that: The determining, according to the starting point request current, the charging coefficient, and the maximum charging current, of the starting point charging current of the current temperature range includes: Obtaining a modified requested current according to a product of the starting point requested current and the charging coefficient; If the modified requested current is greater than or equal to the maximum charging current, using the maximum charging current as the starting charging current; If the corrected requested current is less than the maximum charging current, the corrected requested current is used as the starting charging current.

7. A device for determining remaining charging time, characterized in that: Applied to a battery, the device comprises: A first acquisition unit, in response to establishing a charging connection with a target charging pile, acquires first relationship data, second relationship data, and charging pile charging parameters of the target charging pile, wherein the first relationship data and the second relationship data are established by the historical charging data of the target charging pile for charging the battery, the historical charging data includes historical charging current, historical request current, historical battery temperature, historical remaining power, and historical temperature rise rate of multiple historical charging of the battery, the first relationship data characterizes the relationship between battery temperature, battery remaining power, and battery temperature rise rate, the first relationship data is determined based on the historical battery temperature, the historical remaining power, and the historical temperature rise rate, the second relationship data characterizes the relationship between battery temperature, battery remaining power, and battery request current, the second relationship data The charging pile charging parameters include a maximum charging current and a charging coefficient, determined based on the historical battery temperature, the historical remaining power, and the historical requested current. The maximum charging current is determined by: if the historical requested currents for charging the battery for at least two times are different and the historical charging currents are the same, the historical charging current is used as the maximum charging current; otherwise, a preset current value is used as the maximum charging current; the charging coefficient is determined by: if the historical requested currents for charging the battery for multiple times are different and the historical charging currents are different, a current ratio between the historical requested current and the historical charging current is determined; if at least two current ratios are the same, the corresponding current ratio is used as the charging coefficient; otherwise, a preset coefficient value is used as the charging coefficient, and the preset coefficient value is less than or equal to 1; a second acquiring unit, configured to acquire a current battery temperature of the battery; The first determining unit determines the remaining charging time of the battery according to the first relationship data, the second relationship data, the charging parameters of the charging pile, and the current battery temperature.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program includes executable instructions, and when the executable instructions are executed by a processor, the method according to any one of claims 1 to 6 is implemented.

9. An electronic device, characterized in that: include: one or more processors; A memory for storing executable instructions of the processor, wherein when the executable instructions are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 6.

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