Charging time determination method, device, terminal and storage medium

Abstract

The present application is about a method, device, terminal and storage medium for determining the charging time of a battery, the method comprising: determining the current number of charging cycles of the battery; determining the current capacity value of the battery according to the current number of charging cycles; determining the current resistance value according to the current number of charging cycles and the current capacity value; determining the charging time according to the current resistance value and the current capacity value. In this method, the current capacity value and the current resistance value of the battery are first determined according to the current number of charging cycles of the battery, and then the charging time is determined according to the current capacity value and the current resistance value. In this way, the impact of battery aging on the charging time can be reduced, the accuracy of the charging time can be improved to a certain extent, and the user experience can be improved.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a charging time determination method, device, terminal and storage medium. Background Art

[0002] Currently, when determining the charging time of a battery in a mobile phone, it is often determined directly based on the initial capacity value, initial resistance value, and current charging current or charging voltage of the battery.

[0003] However, as the battery ages with use, the battery capacity and resistance values ​​will change, which results in the charging time calculated by the above method being inaccurate and having a certain error. In particular, as the battery ages more and more, the error in charging time becomes larger and larger, seriously affecting the user experience. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present application provides a charging time determination method, device, terminal and storage medium.

[0005] According to a first aspect of an embodiment of the present application, a method for determining a charging duration is provided, which is applied to a terminal, and the method includes:

[0006] Determine the current number of charge cycles of the battery;

[0007] Determining a current capacity value of the battery according to the current number of charging cycles;

[0008] Determining a current resistance value according to the current number of charging cycles and the current capacity value;

[0009] The charging time is determined according to the current resistance value and the current capacity value.

[0010] Optionally, determining a current resistance value according to the current number of charging cycles and the current capacity value includes:

[0011] Determining a theoretical increase in resistance value of the battery resistance according to the current number of charging cycles;

[0012] Determine a current theoretical resistance value according to a current charging current value, a current remaining power value, and the current capacity value;

[0013] The current resistance value is determined according to the theoretical increase value and the current theoretical resistance value.

[0014] Optionally, determining the theoretical increase in resistance value of the battery according to the current number of charging cycles includes:

[0015] Acquire first configuration information, the first configuration information including, under a preset condition, a first mapping relationship between the current number of charging cycles and a current cycle resistance value under the current number of charging cycles;

[0016] Determining the current cycle resistance value according to the first configuration information and the current number of charging cycles;

[0017] Obtaining the initial resistance value of the battery under the preset conditions;

[0018] The theoretical increased resistance value is determined according to the current cycle resistance value and the initial resistance value.

[0019] Optionally, determining the current theoretical resistance value according to the current charging current value, the current remaining power value and the current capacity value includes:

[0020] Determine a current amount of power to be charged according to the current remaining power value and the current capacity value;

[0021] Determining a first ratio according to the current value of the amount to be charged and the current capacity value;

[0022] Acquire second configuration information, wherein the second configuration information includes a second mapping relationship between the current current value and the first ratio and the current theoretical resistance value;

[0023] The current theoretical resistance value is determined according to the second configuration information, the current charging current value, and the first ratio.

[0024] Optionally, determining the current capacity value of the battery according to the current number of charging cycles includes:

[0025] Acquire third configuration information, the third configuration information including a third mapping relationship between the current number of charging cycles and the current capacity value;

[0026] The current capacity value is determined according to the third configuration information and the current number of charging cycles.

[0027] Optionally, the third mapping relationship includes a sub-mapping relationship, the sub-mapping relationship refers to a mapping relationship between the current number of charging cycles and an aging coefficient of the battery, and determining the current capacity value according to the third configuration information and the current number of charging cycles includes:

[0028] Determining an aging coefficient under the current number of charging cycles according to the sub-mapping relationship and the current number of charging cycles;

[0029] The current capacity value is determined according to the initial capacity value of the battery and the aging coefficient.

[0030] According to a second aspect of an embodiment of the present application, a device for determining a charging duration is provided, which is applied to a terminal. The device includes a determination module, and the determination module is used to:

[0031] Determine the current number of charge cycles of the battery;

[0032] Determining a current capacity value of the battery according to the current number of charging cycles;

[0033] Determining a current resistance value according to the current number of charging cycles and the current capacity value;

[0034] The charging time is determined according to the current resistance value and the current capacity value.

[0035] Optionally, the determining module is further used to:

[0036] Determining a theoretical increase in resistance value of the battery resistance according to the current number of charging cycles;

[0037] Determine a current theoretical resistance value according to a current charging current value, a current remaining power value, and the current capacity value;

[0038] The current resistance value is determined according to the theoretical increase value and the current theoretical resistance value.

[0039] Optionally, the determining module includes:

[0040] An acquisition submodule, configured to acquire first configuration information, wherein the first configuration information includes, under a preset condition, a first mapping relationship between the current number of charging cycles and a current cycle resistance value under the current number of charging cycles;

[0041] A determination submodule, configured to determine the current cycle resistance value according to the first configuration information and the current number of charging cycles;

[0042] The acquisition submodule is further used to acquire the initial resistance value of the battery under the preset conditions;

[0043] The determination submodule is further used to determine the theoretical increased resistance value according to the current cycle resistance value and the initial resistance value.

[0044] Optionally, the determining module includes:

[0045] A determination submodule, configured to determine a current amount of power to be charged according to the current remaining power value and the current capacity value;

[0046] Also used to determine a first ratio according to the current value of the amount to be charged and the current capacity value;

[0047] An acquisition submodule, used for acquiring second configuration information, wherein the second configuration information includes a second mapping relationship between the current current value and the first ratio and the current theoretical resistance value;

[0048] The determination submodule is further used to determine the current theoretical resistance value according to the second configuration information, the current charging current value and the first ratio.

[0049] Optionally, the determining module includes:

[0050] An acquisition submodule, configured to acquire third configuration information, wherein the third configuration information includes a third mapping relationship between the current number of charging cycles and the current capacity value;

[0051] The determination submodule is used to determine the current capacity value according to the third configuration information and the current number of charging cycles.

[0052] Optionally, the third mapping relationship includes a sub-mapping relationship, and the sub-mapping relationship refers to a mapping relationship between the current number of charging cycles and an aging coefficient of the battery. The determining module is further used to:

[0053] Determining an aging coefficient under the current number of charging cycles according to the sub-mapping relationship and the current number of charging cycles;

[0054] The current capacity value is determined according to the initial capacity value of the battery and the aging coefficient.

[0055] According to a third aspect of an embodiment of the present application, a terminal is provided, the terminal comprising:

[0056] processor;

[0057] a memory for storing processor-executable instructions;

[0058] The processor is configured to execute the method as described in the first aspect.

[0059] According to a fourth aspect of an embodiment of the present application, a non-temporary computer-readable storage medium is provided. When instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method described in the first aspect.

[0060] The technical solution provided by the embodiments of the present application may include the following beneficial effects: In this method, the current capacity value and the current resistance value of the battery are first determined based on the current number of charging cycles of the battery, and then the charging time is determined based on the current capacity value and the current resistance value. In this way, the impact of battery aging on the charging time can be reduced, the accuracy of the charging time can be improved to a certain extent, and the user experience is enhanced.

[0061] 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

[0062] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0063] Figure 1 The figure is a flow chart of a method for determining a battery charging time according to an exemplary embodiment.

[0064] Figure 1a FIG. 1 is a schematic diagram showing that the resistance value of a first system battery ages with the number of charging cycles according to an exemplary embodiment.

[0065] Figure 1b FIG. 1 is a schematic diagram showing that the resistance value of a second system battery ages with the number of charging cycles according to an exemplary embodiment.

[0066] Figure 2 The figure is a block diagram of a method and apparatus for determining a battery charging time according to an exemplary embodiment.

[0067] Figure 3 is a block diagram of a terminal according to an exemplary embodiment. DETAILED DESCRIPTION

[0068] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0069] In the related art, a commonly used method for calculating battery charging time is as follows.

[0070] Constant current charging time: t = (C1-C2) / I; where C1 represents the initial total capacity of the battery, C2 represents the capacity of the battery that has been charged, the capacity here refers to the charge value, the unit is milliampere-hour (mAh); I represents the current charging current value, the unit is milliampere (mA); when calculating the constant voltage charging time, simply multiply it by a coefficient k, that is, t = k*(C1-C2) / I.

[0071] It can be seen that the above method does not take into account the aging of the battery. In fact, the more charging cycles a battery has, the more serious its aging is. Specifically, the total capacity of the battery decays with the increase in the number of charging cycles, and the resistance of the battery increases with the increase in the number of charging cycles. Therefore, the charging time calculated by the above method is not accurate.

[0072] The present disclosure provides a method for determining charging time, which is applied to a terminal. Figure 1 As shown, in this method, the current capacity value and the current resistance value of the battery are first determined according to the current number of charging cycles of the battery, and then the charging time is determined according to the current capacity value and the current resistance value. In this way, the impact of battery aging on the charging time can be reduced, the accuracy of the charging time can be improved to a certain extent, and the user experience is enhanced.

[0073] In an exemplary embodiment, a method for determining charging duration is provided. The method mainly calculates the charging duration in a constant voltage charging stage, and the method includes:

[0074] S110, determining the current number of charging cycles of the battery;

[0075] S120, determining the current capacity value of the battery according to the current number of charging cycles;

[0076] S130, determining a current resistance value according to the current number of charging cycles and the current capacity value;

[0077] S140: Determine charging time according to the current resistance value and the current capacity value.

[0078] In step S110, the current remaining power value of the battery can be obtained in real time, and based on the current remaining power value and the current capacity value, a first ratio of the remaining power value to the current capacity value can be determined, and the first ratio can be compared with a preset ratio. If the first ratio is less than or equal to the preset ratio, the number of charging cycles is increased by one.

[0079] A counter may be set in the terminal to record the number of charging cycles of the battery, and the initial value of the number of charging cycles in the counter may be 0. During the use of the terminal, whenever the first proportion value is less than or equal to the preset proportion value, the number of charging cycles recorded in the counter increases by 1.

[0080] Example:

[0081] Generally, if the remaining power value of the battery reaches or is lower than 20% of the total capacity value before charging, the battery will age more, that is, the capacity value and resistance value of the battery will be greatly affected. Therefore, in this example, the preset percentage value can be set to 20%, the initial value of the number of charging cycles in the counter is 0, and the initial value of the current capacity value is the initial capacity value of the battery.

[0082] The processor of the terminal obtains the current remaining power value of the battery in real time. When the first proportion of the current remaining power value in the current capacity value is less than or equal to 20% for the first time, the number of charging cycles in the counter is increased by 1, and the value of the current number of charging cycles in the counter becomes 1. When the first proportion of the current remaining power value in the current capacity value is less than or equal to 20% again, the number of charging cycles in the counter is increased by 1 again, and the value of the current number of charging cycles in the counter becomes 2. And so on, the current number of charging cycles of the battery is determined by this method.

[0083] It should be noted that in this method, a preset power value can also be directly set in the terminal, and when the remaining power value of the battery reaches or falls below the preset power value, the number of charging cycles is increased. In this way, there is no need to calculate the proportion of the current remaining power value in the current capacity value, which simplifies the process of determining the number of charging cycles.

[0084] Example:

[0085] In this example, the preset power value can be set to 20% of the initial capacity value of the battery, the initial value of the number of charging cycles in the counter is 0, and the initial value of the current capacity value is the initial capacity value of the battery.

[0086] The processor of the terminal obtains the current remaining power value of the battery in real time. When the current remaining power value is equal to or less than 20% of the initial capacity value for the first time, the number of charging cycles in the counter increases by 1, and the value of the current number of charging cycles in the counter becomes 1. When the current remaining power value is equal to or less than 20% of the initial capacity value again, the number of charging cycles in the counter increases by 1 again, and the value of the current number of charging cycles in the counter becomes 2. And so on, the current number of charging cycles of the battery is determined by this method.

[0087] In step S120, after the current number of charging cycles is determined, the capacity value of the battery can be corrected according to the current number of charging cycles to determine the current capacity value under the current number of charging cycles.

[0088] It should be noted that when determining the current capacity value here, only the current charging cycle number is used, but the current capacity value is not determined only based on the current charging cycle number. That is, the current capacity value can be determined by the current charging cycle number and other parameters.

[0089] In step S130, after the current number of charging cycles is determined, the resistance value of the battery can be corrected according to the current number of charging cycles and the current capacity value to determine the current resistance value under the current number of charging cycles.

[0090] It should be noted that when determining the current resistance value here, only the current number of charging cycles and the current capacity value are used, but the current resistance value is not determined solely based on the current number of charging cycles and the current Rong Lingzhi. That is, the current resistance value can be determined by the current number of charging cycles, the current capacity value and other parameters (such as the current current value).

[0091] In step S140, the charging time refers to the remaining charging time. It should be noted that when determining the charging time here, the current capacity value is used to replace the initial capacity value in the related art, but the charging time is not determined only based on the current capacity value. That is, the charging time can be determined by the current capacity value and other parameters.

[0092] In this step, after the current resistance value and the current capacity value are determined, the current resistance value is used to replace the initial resistance value, and the current capacity value is used to replace the initial capacity value, and then the charging time is determined according to the current resistance value and the current capacity value. This method not only avoids the influence of the increase of the resistance value due to the aging of the battery on the calculation of the charging time, but also avoids the influence of the decrease of the capacity value due to the aging of the battery on the calculation of the charging time, and can better improve the accuracy of the determined charging time.

[0093] It should be noted that when determining the charging time here, only the current resistance value and the current capacity value are used, but the charging time is not determined solely based on the current resistance value and the current capacity value. That is, the charging time can be determined by the current resistance value and the current capacity value and other parameters. It can be understood that, in general, other parameters may include the current charging voltage value and the current charging current value, etc.

[0094] In this method, as the number of charging cycles increases, the current capacity value at the current number of charging cycles is re-determined. Therefore, the capacity value of the battery displayed by the terminal can also be updated in real time according to the number of charging cycles, that is, the capacity value of the battery displayed by the terminal is the current capacity value. When the user checks the capacity value of the terminal, the terminal no longer displays the initial capacity value of the battery, but displays the current capacity value after the battery is aged, so that the user can immediately understand the degree of battery aging and improve the user experience.

[0095] This method can reduce the impact of battery aging on charging time, improve the accuracy of charging time to a certain extent, and enhance the user experience.

[0096] In an exemplary embodiment, a method for determining a battery charging time is provided. The method is an improvement on step S130 in the above method, and for example, the current resistance value of the battery is determined according to the current number of charging cycles and the current capacity value, including:

[0097] S210, determining a theoretical increase in resistance value of the battery resistance according to the current number of charging cycles;

[0098] S220, determining a current theoretical resistance value according to a current charging current value, a current remaining power value, and a current capacity value;

[0099] S230: Determine the current resistance value according to the theoretical increase value and the current theoretical resistance value.

[0100] In step S210, as the number of charging cycles increases, the aging degree of the battery gradually deepens, and the resistance value of the battery gradually increases. Therefore, through experiments and data processing, a mapping relationship between the current number of charging cycles and the theoretical increase in resistance value can be obtained, which is recorded as the first mapping relationship. The theoretical increase in resistance value here refers to the resistance value that the battery theoretically increases with the number of charging cycles. After determining the above first mapping relationship, the required theoretical increase in resistance value can be determined according to the current number of charging cycles.

[0101] In step S220, the resistance value of the battery is not only affected by the number of charging cycles, but also by the charging current, the remaining power and the current capacity value. Therefore, the method can obtain the correlation between the current current value (i.e., the current charging current value), the current remaining power value and the current theoretical resistance value through experiments and data processing. The current theoretical resistance value here refers to the theoretical resistance value of the battery under the current current value, the current remaining power value and the current capacity value. After determining the above correlation, the current theoretical resistance value can be determined based on the current current value, the current remaining power value and the current capacity value.

[0102] In step S230, the theoretical increase value and the current theoretical resistance value may be summed, and the summed result is used as the current resistance value.

[0103] In this method, the determined current resistance value includes not only the influence of the number of charging cycles on the battery resistance, but also the influence of the current charging current value and the current remaining power value on the battery resistance, thereby improving the accuracy of the current resistance value, and further improving the accuracy of the ultimately determined charging time.

[0104] In an exemplary embodiment, a method for determining the charging time of a battery is provided. The method is an improvement on step S210 in the above method, and for example, according to the current number of charging cycles, the theoretical increase in resistance value of the battery is determined, including:

[0105] S211, obtaining first configuration information, the first configuration information including, under a preset condition, a first mapping relationship between a current charging cycle number and a current cycle resistance value under the current charging cycle number;

[0106] S212, determining a current cycle resistance value according to the first configuration information and the current number of charging cycles;

[0107] S213, obtaining an initial resistance value of the battery under preset conditions;

[0108] S214: Determine a theoretical increase in resistance value according to the current cycle resistance value and the initial resistance value.

[0109] In this method, the current cycle resistance value is first determined according to the current number of charging cycles. The current cycle resistance value refers to the resistance value of the battery after the initial resistance value is aged after the battery is charged for the current number of charging cycles. The above-mentioned current cycle resistance value and initial resistance value both refer to the DC internal resistance value of the battery. Moreover, the current cycle resistance value does not include the influence of the current charging current value, the current charging voltage value, and the current capacity value on the resistance of the battery.

[0110] The preset condition may be a condition where the direct current resistance (DCR) of the battery is 1A1S, 50% SOC, and 25°C. That is, when determining the first mapping relationship, the current cycle resistance value is obtained by dividing the voltage change value of charging 1A 1S by the current charging current value when the remaining power value of the battery is 50% of the initial capacity value of the battery and the charging temperature is 25°C.

[0111] At present, the establishment of battery models requires the open circuit voltage (OCV) of each project's actual battery, and the battery is charged 200 times or even 400 times to establish a relatively accurate power model. However, the experiment of charging 200 or even 400 times takes too long, resulting in the inability to import the power model in time, affecting the user experience.

[0112] In addition, the same type of terminal often uses the same system battery, that is, batteries with the same positive and negative electrode materials, separators, and electrolytes. Generally, different terminals are equipped with batteries of different sizes and capacities just to meet different needs. They have the same aging characteristics. Therefore, the above aging characteristics can be summarized and used in each battery of the same system.

[0113] Example 1: A battery for the first system.

[0114] First, multiple sets of current charging cycle times and current cycle resistance values ​​are obtained, and then the above data are fitted by fitting software. The fitting degree (R 2 ) must be less than or equal to the set value, which can be 0.97.

[0115] Finally, the first mapping relationship is determined to be a linear relationship. For example, refer to Figure 1a As shown, in a certain terminal, the first mapping relationship obtained by fitting is: y=0.0443*n+70 (n≥0), and the fitting degree is 0.9709, which meets the requirement of being greater than or equal to 0.97.

[0116] If the current number of charging cycles is 0, substituting it into the above first mapping relationship, the current cycle resistance value can be obtained as 70 (mΩ), and the current cycle resistance value at this time is the initial resistance value. If the current number of charging cycles is 2, substituting it into the above first mapping relationship, the current cycle resistance value when the current number of charging cycles is 2 can be obtained as 0.0443*2+70=70.0886 (mΩ).

[0117] It should be noted that the first mapping relationship may also be other linear relationships or polynomials, as long as the degree of fit is greater than or equal to the set value. Moreover, the larger the set value, the higher the accuracy of the result when determining the current circulation resistance value according to the linear equation finally obtained.

[0118] Example 2: Batteries for the second system.

[0119] First, multiple sets of current charging cycle times and current cycle resistance values ​​are obtained, and then the above data are fitted by fitting software. The fitting degree (R 2 ) must be less than or equal to the set value, which can be 0.97.

[0120] In a similar manner to Example 1 above, the first mapping relationship is finally determined to be a quartic. Figure 1b As shown, in a certain terminal, the first mapping relationship obtained by fitting is: y = -(8E-10)n 4 +(1E-06)n 3 -0.0009n 2 +0.2349n+54.893(n≥0), the fitting degree is 0.9751, which meets the requirement of being greater than or equal to 0.97. (8E-10) is the scientific notation.

[0121] If the current number of charging cycles is 0, substituting it into the above first mapping relationship, the current cycle resistance value can be obtained as 54.893 (mΩ), and the current cycle resistance value at this time is the initial resistance value. Similarly, if the current number of charging cycles is 2, substituting it into the above first mapping relationship, the current cycle resistance value when the current number of charging cycles is 2 can be obtained.

[0122] It should be noted that the first mapping relationship may also be other polynomials as long as the degree of fit is greater than or equal to the set value. Moreover, the larger the set value is, the higher the accuracy of the result when determining the current circulation resistance value according to the linear equation finally obtained.

[0123] In step S213 , the initial resistance value may be directly measured through experiments under preset conditions, or may be determined according to the first mapping relationship described above, which will not be described in detail herein.

[0124] In step S214, the current cycle resistance value is subtracted from the initial resistance value to obtain the theoretical increased resistance value. It should be noted that since the current cycle resistance value does not take into account the influence of the current charging current value, the current charging voltage value and the current capacity value on the resistance of the battery, the theoretical increased resistance value also does not take into account the influence of the current charging current value, the current charging voltage value and the current capacity value, and is only the increase in battery resistance caused by the number of charging cycles.

[0125] In this method, a first mapping relationship is obtained by fitting a large amount of data (multiple sets of current charging cycle numbers and current cycle resistance values), and it is pre-set in the terminal to form the first configuration information. When the charging time needs to be determined, the current cycle resistance value corresponding to it is determined according to the above-mentioned first configuration information and the current charging cycle number, and then the initial resistance value is subtracted therefrom to obtain the theoretical increased resistance value. The charging time is then calculated based on the theoretical increased resistance value. This method avoids the influence of the increase in resistance value caused by battery aging on the calculation of the charging time, and improves the accuracy of the determined charging time to a certain extent.

[0126] It should be noted that the first mapping relationship can be preset in the terminal in the form of the above function, or in the form of a first mapping relationship table. When the first mapping relationship table is preset in the terminal, after determining the current number of charging cycles, the current cycle resistance value corresponding to the current number of charging cycles can be directly found in the first mapping relationship table, which is not described in detail here.

[0127] In an exemplary embodiment, a method for determining the battery charging time is provided. The method is an improvement on step S220 in the above method, and for example, the current theoretical resistance value is determined according to the current charging current value, the current remaining power value and the current capacity value, including:

[0128] S221, determining a current amount of power to be charged according to a current remaining power value and a current capacity value;

[0129] S222, determining a first ratio according to the current value of the amount to be charged and the current capacity value;

[0130] S223, obtaining second configuration information, wherein the second configuration information includes a second mapping relationship between the current current value and the first ratio and the current theoretical resistance value;

[0131] S224. Determine a current theoretical resistance value according to the second configuration information, the current charging current value, and the first ratio.

[0132] In step S221, the current amount to be charged refers to the amount of charge that needs to be replenished in the battery, and the current amount to be charged can be obtained by subtracting the current remaining power value from the current capacity value.

[0133] In step S222, the first ratio may be the proportion of the current amount to be charged to the current capacity value. The first ratio may be determined by dividing the current amount to be charged by the current capacity value. Generally, the first ratio may be expressed in the form of a percentage.

[0134] In this method, a charging experiment can be performed on a fresh battery, that is, a charging experiment can be performed on a battery with an initial resistance value, to obtain multiple groups of current current values, current values ​​of the amount to be charged, current capacity values ​​and current theoretical resistance values, and the above multiple groups of data are fitted to obtain a function for determining the current theoretical resistance value: Ra=f(I, B), wherein Ra represents the current theoretical resistance value, I represents the current current value, and B represents a first ratio, and the first function is used to determine the current theoretical resistance value based on the charging current value and the first ratio.

[0135] When determining the charging time, the above function, as well as the current current value (i.e., the current charging current value) and the first ratio can be directly used to determine the current theoretical resistance value. The current theoretical resistance value refers to the dynamic total DC internal resistance (including ohmic impedance, electrochemical impedance, concentration polarization, etc.) under the first ratio and the current charging current value without considering the number of charging cycles.

[0136] It should be noted that this method is actually mainly based on the current current value, the current value of the amount to be charged and the current capacity value to determine the dynamic full DC internal resistance (including ohmic impedance, electrochemical impedance, concentration polarization, etc.) as the current theoretical resistance value. Therefore, the above first ratio can actually be obtained by dividing the current capacity value by the current value of the amount to be charged. In addition, since the sum of the current remaining power value and the current value of the amount to be charged is equal to the current capacity value, the first ratio can also be directly determined by the current remaining power value and the current capacity value, for example, by dividing the current remaining power value by the current capacity value.

[0137] In addition, since the first ratio and the current current value are used to determine the current theoretical resistance value in this method, the method can be used for batteries of the same system even if they have different sizes and capacities, thereby improving the adaptability of the method.

[0138] In this method, a polynomial of the charging current value and the first ratio is used to fit the current theoretical resistance value. The heat generated by the battery during the charging process is also related to the current value of the previous charging point. Therefore, the polynomial f(I, B) containing the I factor indirectly covers the influence of temperature on the dynamic DC internal resistance, that is, it covers the influence of temperature on the current theoretical resistance value and the influence of temperature on the charging time, which can further improve the accuracy of the finally determined charging time.

[0139] In an exemplary embodiment, a method for determining a battery charging time is provided. The method is an improvement on step S120 in the above method, and for example, the current capacity value of the battery is determined according to the current number of charging cycles, including:

[0140] S310, obtaining third configuration information, where the third configuration information includes a third mapping relationship between the current number of charging cycles and the current capacity value;

[0141] S320: Determine a current capacity value according to the third configuration information and the current number of charging cycles.

[0142] In this method, the third mapping relationship is similar to the first mapping relationship, and can be in the form of a function or a third mapping relationship table. The following mainly introduces the function form.

[0143] When determining the third mapping relationship, multiple groups of current charging cycle numbers and current capacity values ​​can be determined first, and then the above data can be processed to fit the aging model of the battery capacity value (the third mapping relationship): C(n)=f(n)*C(0); wherein C(n) is the current capacity value, n is the current charging cycle number, and C(0) is the initial capacity value of the battery.

[0144] In the above-mentioned third mapping relationship C(n)=f(n)*C(0), the initial capacity value (C(0)) of the battery can be directly detected for the fresh battery. Therefore, in fact, the third mapping relationship may include a sub-mapping relationship between the current number of charging cycles (n) and the aging coefficient (L=f(n)).

[0145] For example, when the third mapping relationship includes a sub-mapping relationship, determining the current capacity value according to the third configuration information and the current number of charging cycles includes:

[0146] S321, determining an aging coefficient under the current number of charging cycles according to the sub-mapping relationship and the current number of charging cycles;

[0147] S322: Determine the current capacity value according to the initial capacity value and aging coefficient of the battery.

[0148] In this example, L=f(n) can be a decreasing function, that is, as the current number of charging cycles increases, the aging coefficient gradually decreases. That is, the determined current capacity value decreases as the current number of charging cycles increases, thereby reducing the impact of battery aging on the determined charging time to a certain extent and improving the accuracy of the charging time.

[0149] In order to better explain the method for determining the battery charging time of the present invention, a specific example is provided below for illustration.

[0150] Example:

[0151] The terminal may be a mobile phone, and the charging time (total charging time) of the battery of the mobile phone may be estimated by the following algorithm:

[0152] The first charging time of the constant current (charging current value remains unchanged) charging stage:

[0153] t1=(Q2-Q1) / I;

[0154] The second charging time of the constant voltage (charging voltage value remains unchanged) charging stage:

[0155]

[0156] In this method, Ra(n)=(U1-U OCV ) / I is used to represent the dynamic resistance value of the battery in this charging state (i.e., the current resistance value, which includes ohmic impedance, electrochemical impedance, concentration polarization, etc.), and then the current resistance value is divided into the current theoretical resistance value (Ra) and the theoretical increased resistance value (Δ2). The final second charging time estimation algorithm is determined as follows:

[0157]

[0158] Total charging time: t = t1 + t2;

[0159] Among them, Q2 is the end power value of the battery in the constant current charging stage (charge value, unit is milliampere hour (mAh)), and the end power value can be preset in the terminal in advance; Q1 is the starting power value of the battery in the constant current charging stage, recorded as the first starting power value; Q3 is the starting power value of the constant voltage charging stage, recorded as the second starting power value; Q maxis the maximum charge value of the battery, that is, the capacity value of the battery, C(n) is the current capacity value of the battery (the maximum value of the charge that can be accommodated), where Q max =C(n); Ra(n) is the current resistance value of the battery (in milliohms (mΩ)); Ra is the current theoretical resistance value; U1 is the current voltage value of the battery (i.e., the current charging voltage value, in volts (V)), which can be measured by the first voltage detection device. In addition, the open circuit voltage value can also be determined using other existing methods, which will not be described in detail here; U OCV is the open circuit voltage value of the battery, which can be measured by the second voltage detection device. The open circuit voltage value is less than the charging voltage value. In addition, the open circuit voltage value can also be determined by other existing methods, which will not be described here; Δ2 is the theoretical increase in resistance value (DC internal resistance value, in milliohms), and Δ2 = Dcr 50％ (n)-Dcr 50％ (0), where Dcr 50％ (n) indicates the value under the preset conditions when the current charging cycle number is n. The preset conditions are: the remaining power value of the battery is 50% of the initial capacity value of the battery, the charging temperature is 25°C, and the value obtained by dividing the voltage change value of charging 1A 1S by the current charging current value is recorded as the current cycle resistance value; Dcr 50％ (0) indicates the value under preset conditions when the current charging cycle number is 0, which is recorded as the initial resistance value.

[0160] The battery in the mobile phone may be a battery of the first system, and the mobile phone is preset with first configuration information, second configuration information and third configuration information. The first configuration information includes a first mapping relationship: Dcr 50％ (n) = 0.0443*n + 70 (n ≥ 0), where Dcr 50％ (n) represents the current cycle resistance value, and n represents the current number of charging cycles. The second configuration information includes a second mapping relationship: Ra=f(I, B), wherein Ra represents the current theoretical resistance value, I is the current current value of the battery (i.e., the current charging current value, in milliamperes (mA)), and the current current value can be measured by a current detection device such as a current sensor. In addition, the current current value can also be determined using other methods of the prior art, which will not be described in detail here; B is the first ratio of the battery (the ratio of the current amount to be charged to the current capacity value), wherein the current amount to be charged can be determined by the current remaining power value and the current capacity value, and the current remaining power value can be directly measured, or determined by other methods in the prior art, which will not be described in detail here. The third configuration information includes a third mapping relationship: C(n)=f(n)*C(0), wherein n is the current number of charging cycles, and C(0) is the initial capacity value of the battery.

[0161] In this method, the first charging duration of the constant current charging stage can be directly determined according to relevant technologies and will not be elaborated here.

[0162] When determining the second charging time of the constant voltage charging stage, the processor of the mobile phone can first obtain parameters such as the current number of charging cycles, the end power value, the starting power value, the current current value, the second initial power value, the current voltage value, the open circuit voltage value, the initial resistance value, and configuration information such as the first configuration information, the second configuration information and the third configuration information. There is no limitation on the order in which the above parameters and configuration information are obtained.

[0163] Among them, the second starting power value (Q3) is at least equal to the end power value of the constant current charging stage, and at most equal to the current capacity value. When the second starting power value is equal to the end power value of the constant current charging stage, the second charging duration determined is the duration of a complete constant voltage charging stage. When the second starting power value is equal to the current capacity value, it means that charging has been completed, and the second charging duration is zero.

[0164] It should be noted that when the battery is in the constant voltage charging stage, the current remaining power value can be directly measured, and then the current remaining power value is used as the second starting power value.

[0165] After determining the current charging cycle number and the first configuration information, the current charging cycle number is substituted into the first mapping relationship to determine the current cycle resistance value. After determining the current cycle resistance value and the initial resistance value, the initial resistance value can be subtracted from the current cycle resistance value to obtain the theoretical increase resistance value (Δ2).

[0166] After the current number of charging cycles and the third configuration information are determined, the current number of charging cycles is substituted into the third mapping relationship to determine the current capacity value (C(n)).

[0167] After determining the current remaining power value and the current capacity value, the current remaining power value is subtracted from the current capacity value to obtain the current to-be-charged power value, and then the current to-be-charged power value is divided by the current power value to obtain a first ratio. The first ratio and the current current value are then substituted into the second mapping relationship to calculate the current theoretical resistance value (Ra).

[0168] At this point, all the parameters required for calculating the second charging time are determined: the current voltage value (U1), the open circuit voltage value (U OCV ), theoretical increase in resistance value (Δ2), the second starting charge value (Q3), the current capacity value (C(n)) and the current theoretical resistance value (Ra), and then substitute the above parameters into the calculation formula of the second charging time to determine the second charging time.

[0169] In this method, the current resistance value is used to replace the initial resistance value, and the current capacity value is used to replace the initial capacity value, and then the charging time is determined based on the current resistance value and the current capacity value. This method not only avoids the influence of the increase of resistance value due to battery aging on the calculation of charging time, but also avoids the influence of the decrease of capacity value due to battery aging on the calculation of charging time, which can better improve the accuracy of the determined charging time.

[0170] The present disclosure also proposes a charging time determination device, which is applied to a terminal and is used to implement the above method. In the device, when determining the charging time in the constant voltage stage, the current capacity value of the battery is first determined according to the current number of charging cycles of the battery, and then the charging time is determined according to the current capacity value, thereby reducing the impact of battery aging on the charging time, improving the accuracy of the charging time to a certain extent, and enhancing the user experience.

[0171] In an exemplary embodiment, a device for determining a battery charging time is provided, referring to Figure 2 As shown, the device includes a determination module 100. In the process of implementing the above method, the determination module 100 is used to:

[0172] Determine the current number of charge cycles of the battery;

[0173] Determine the current capacity value of the battery according to the current number of charging cycles;

[0174] Determine the current resistance value according to the current number of charging cycles and the current capacity value;

[0175] Determine the charging time based on the current resistance value and the current capacity value.

[0176] In an exemplary embodiment, a device for determining the battery charging time is provided, which is a further improvement of the above-mentioned device. Figure 2 As shown, in the device, the determination module 100 is also used for:

[0177] Determine the theoretical increase in resistance of the battery according to the current number of charging cycles;

[0178] Determine the current theoretical resistance value according to the current charging current value, the current remaining power value and the current capacity value;

[0179] Determine the current resistance value based on the theoretical increase value and the current theoretical resistance value.

[0180] In an exemplary embodiment, a device for determining the battery charging time is provided, which is a further improvement of the above-mentioned device. Figure 2 As shown, in the device, the determination module 100 includes:

[0181] The acquisition submodule 101 is used to acquire first configuration information, where the first configuration information includes, under a preset condition, a first mapping relationship between the current number of charging cycles and the current cycle resistance value under the current number of charging cycles;

[0182] A determination submodule 102, configured to determine a current cycle resistance value according to the first configuration information and the current number of charging cycles;

[0183] The acquisition submodule 101 is also used to obtain the initial resistance value of the battery under preset conditions;

[0184] The determination submodule 102 is further configured to determine a theoretical increase in resistance value according to the current cycle resistance value and the initial resistance value.

[0185] In an exemplary embodiment, a device for determining the battery charging time is provided, which is a further improvement of the above-mentioned device. Figure 2 As shown, in the device, the determination module 100 includes:

[0186] The determination submodule 102 is used to determine the current value of the amount to be charged according to the current remaining power value and the current capacity value;

[0187] It is also used to determine a first ratio according to the current value of the amount to be charged and the current capacity value;

[0188] The acquisition submodule 101 is used to acquire second configuration information, wherein the second configuration information includes a second mapping relationship between the current current value and the first ratio and the current theoretical resistance value;

[0189] The determination submodule 102 is further configured to determine a current theoretical resistance value according to the second configuration information, the current charging current value and the first ratio.

[0190] In an exemplary embodiment, a device for determining the battery charging time is provided, which is a further improvement of the above-mentioned device. Figure 2 As shown, in the device, the determination module 100 includes:

[0191] The acquisition submodule 101 is used to acquire third configuration information, where the third configuration information includes a third mapping relationship between the current number of charging cycles and the current capacity value;

[0192] The determination submodule 102 is used to determine the current capacity value according to the third configuration information and the current number of charging cycles.

[0193] In an exemplary embodiment, a device for determining the battery charging time is provided, which is a further improvement of the above-mentioned device. Figure 2As shown, in the device, the third mapping relationship includes a sub-mapping relationship, and the sub-mapping relationship refers to a mapping relationship between the current number of charging cycles and the aging coefficient of the battery. The determination module 100 is also used for:

[0194] Determine an aging coefficient at the current number of charging cycles according to the sub-mapping relationship and the current number of charging cycles;

[0195] The current capacity value is determined based on the initial capacity value and aging coefficient of the battery.

[0196] The present application also provides a terminal, which may be a mobile phone, a tablet computer, a laptop computer, a video camera, a camera, or other device with a rechargeable battery.

[0197] In an exemplary embodiment, reference Figure 3 As shown, terminal 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0198] The processing component 402 generally controls the overall operation of the terminal 400, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 402 may include one or more modules to facilitate the interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate the interaction between the multimedia component 408 and the processing component 402.

[0199] The memory 404 is configured to store various types of data to support operations at the terminal 400. Examples of such data include instructions for any application or method operating on the terminal 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk, or an optical disk.

[0200] Power component 406 provides power to various components of terminal 400. Power component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal 400.

[0201] The multimedia component 408 includes a screen that provides an output interface between the terminal 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera module and / or a rear camera module. When the terminal 400 is in an operating mode, such as a shooting mode or a video mode, the front camera module and / or the rear camera module may receive external multimedia data. Each front camera module and the rear camera module may be a fixed optical lens system or have a focal length and optical zoom capability.

[0202] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC), and when the terminal 400 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 404 or sent via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0203] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0204] The sensor assembly 414 includes one or more sensors for providing various aspects of status assessment for the terminal 400. For example, the sensor assembly 414 can detect the open / closed state of the terminal 400, the relative positioning of the components, such as the display and keypad of the terminal 400, and the sensor assembly 414 can also detect the position change of the terminal 400 or a component of the terminal 400, the presence or absence of contact between the user and the terminal 400, the orientation or acceleration / deceleration of the terminal 400, and the temperature change of the terminal 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0205] The communication component 416 is configured to facilitate wired or wireless communication between the terminal 400 and other devices. The device 700 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0206] In an exemplary embodiment, terminal 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above method.

[0207] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, and the instructions can be executed by a processor 420 of a terminal 400 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a tape, a floppy disk, and an optical data storage device. When the instructions in the storage medium are executed by the processor of the terminal, the terminal is enabled to perform the method shown in the above embodiment.

[0208] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the claims.

[0209] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for determining charging time, applied to a terminal, characterized in that: The method comprises: Determine the current number of charge cycles of the battery; Determining a current capacity value of the battery according to the current number of charging cycles; Determining a current resistance value according to the current number of charging cycles and the current capacity value; Determining a charging time according to the current resistance value and the current capacity value; The determining the current resistance value according to the current number of charging cycles and the current capacity value includes: Determining a theoretical increase in resistance value of the battery resistance according to the current number of charging cycles; Determine a current theoretical resistance value according to a current charging current value, a current remaining power value, and the current capacity value; The current resistance value is determined according to the theoretical increased resistance value and the current theoretical resistance value.

2. The method according to claim 1, characterized in that Determining the theoretical increase in resistance value of the battery resistance according to the current number of charging cycles includes: Acquire first configuration information, the first configuration information including, under a preset condition, a first mapping relationship between the current number of charging cycles and a current cycle resistance value under the current number of charging cycles; Determining the current cycle resistance value according to the first configuration information and the current number of charging cycles; Obtaining the initial resistance value of the battery under the preset conditions; The theoretical increased resistance value is determined according to the current cycle resistance value and the initial resistance value.

3. The method according to claim 1, characterized in that The determining of the current theoretical resistance value according to the current charging current value, the current remaining power value and the current capacity value includes: Determine a current amount of power to be charged according to the current remaining power value and the current capacity value; Determining a first ratio according to the current value of the amount to be charged and the current capacity value; Acquire second configuration information, wherein the second configuration information includes a second mapping relationship between the current charging current value and the first ratio and the current theoretical resistance value; The current theoretical resistance value is determined according to the second configuration information, the current charging current value, and the first ratio.

4. The method according to claim 1, characterized in that: Determining the current capacity value of the battery according to the current number of charging cycles includes: Acquire third configuration information, the third configuration information including a third mapping relationship between the current number of charging cycles and the current capacity value; The current capacity value is determined according to the third configuration information and the current number of charging cycles.

5. The method according to claim 4, characterized in that The third mapping relationship includes a sub-mapping relationship, where the sub-mapping relationship refers to a mapping relationship between the current number of charging cycles and an aging coefficient of the battery, and determining the current capacity value according to the third configuration information and the current number of charging cycles includes: Determining an aging coefficient under the current number of charging cycles according to the sub-mapping relationship and the current number of charging cycles; The current capacity value is determined according to the initial capacity value of the battery and the aging coefficient.

6. A device for determining charging time, applied to a terminal, characterized in that: The device includes a determination module, wherein the determination module is configured to: Determine the current number of charge cycles of the battery; Determining a current capacity value of the battery according to the current number of charging cycles; Determining a current resistance value according to the current number of charging cycles and the current capacity value; Determining a charging time according to the current resistance value and the current capacity value; The determining module is further used for: Determining a theoretical increase in resistance value of the battery resistance according to the current number of charging cycles; Determine a current theoretical resistance value according to a current charging current value, a current remaining power value, and the current capacity value; The current resistance value is determined according to the theoretical increased resistance value and the current theoretical resistance value.

7. The device according to claim 6, characterized in that The determination module comprises: An acquisition submodule, configured to acquire first configuration information, wherein the first configuration information includes, under a preset condition, a first mapping relationship between the current number of charging cycles and a current cycle resistance value under the current number of charging cycles; A determination submodule, configured to determine the current cycle resistance value according to the first configuration information and the current number of charging cycles; The acquisition submodule is further used to acquire the initial resistance value of the battery under the preset conditions; The determination submodule is further used to determine the theoretical increased resistance value according to the current cycle resistance value and the initial resistance value.

8. The device according to claim 6, characterized in that The determination module comprises: A determination submodule, configured to determine a current amount of power to be charged according to the current remaining power value and the current capacity value; Also used to determine a first ratio according to the current value of the amount to be charged and the current capacity value; An acquisition submodule, configured to acquire second configuration information, wherein the second configuration information includes a second mapping relationship between the current charging current value and the first ratio and the current theoretical resistance value; The determination submodule is further used to determine the current theoretical resistance value according to the second configuration information, the current charging current value and the first ratio.

9. The device according to claim 6, characterized in that The determination module comprises: An acquisition submodule, configured to acquire third configuration information, wherein the third configuration information includes a third mapping relationship between the current number of charging cycles and the current capacity value; The determination submodule is used to determine the current capacity value according to the third configuration information and the current number of charging cycles.

10. The device according to claim 9, characterized in that The third mapping relationship includes a sub-mapping relationship, and the sub-mapping relationship refers to a mapping relationship between the current number of charging cycles and the aging coefficient of the battery. The determination module is further used to: Determining an aging coefficient under the current number of charging cycles according to the sub-mapping relationship and the current number of charging cycles; The current capacity value is determined according to the initial capacity value of the battery and the aging coefficient.

11. A terminal, characterized in that: The terminal comprises: processor; a memory for storing processor-executable instructions; The processor is configured to execute the method according to any one of claims 1 to 5.

12. A non-transitory computer-readable storage medium, characterized in that: When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method according to any one of claims 1 to 5.

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