Battery capacity updating method, system and electronic device

Abstract

The embodiments of the present application disclose a method, system and electronic device for updating battery capacity, the method comprising: constructing an update label based on the mapping relationship between the remaining capacity of the battery during the discharge process and the cell voltage; obtaining the full charge capacity of the battery based on the accumulated discharge capacity of the battery at the end of the discharge and the update label. The present application obtains an update label by obtaining the mapping relationship between the remaining capacity of the battery during the discharge process and the cell voltage, and calculates the full charge capacity based on the update label and the discharge capacity, thereby realizing the calculation and update of the full charge capacity of the battery when it is not fully discharged, avoiding the situation where the full charge capacity of the battery cannot be updated and the error becomes larger and larger.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery capacity updating method, system and electronic equipment. Background Art

[0002] At present, rechargeable batteries are widely used as energy sources for mobile devices, auxiliary power equipment, electric vehicles (EVs) or similar electronic devices. The full charge capacity (FCC) of a battery is a very important indicator of a battery. However, the full charge capacity of a battery can easily decay as the battery ages, so it is crucial to update the full charge capacity of the battery in a timely manner. However, in the actual use of the battery, due to factors such as the user's usage habits and usage scenarios, the battery may not be fully discharged during use, resulting in the full charge capacity being unable to be updated, which in turn leads to an increasing error in the remaining battery capacity, thus affecting the user experience. Summary of the invention

[0003] The embodiments of the present application provide a method, system and electronic device for updating battery capacity to solve the technical problem in the prior art that the full charge capacity of a battery cannot be updated according to the usage status.

[0004] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0005] In a first aspect, a method for updating battery capacity is provided, the method comprising:

[0006] Construct an update label based on the mapping relationship between the remaining capacity of the battery and the cell voltage during the discharge process;

[0007] The full charge capacity of the battery is obtained based on the discharge capacity accumulated by the battery at the end of discharge and the update tag.

[0008] In combination with the first aspect, the method further includes:

[0009] Obtaining a full charge signal when the battery is charged to saturation;

[0010] enabling the update tag in response to the acquired full charge signal;

[0011] The full charge capacity of the battery is updated based on the enabled update tag and the discharge capacity.

[0012] In combination with the first aspect, the method for updating the full charge capacity of the battery based on the enabled update tag and the discharge capacity includes:

[0013] Determining a remaining capacity percentage of the battery based on the enabled update tag;

[0014] Obtaining a discharge capacity percentage of the battery based on the remaining capacity percentage;

[0015] The full charge capacity is obtained by dividing the discharge capacity by the discharge capacity percentage.

[0016] In combination with the first aspect, a method for constructing a mapping relationship between the remaining capacity and the cell voltage includes:

[0017] Discharging the battery that has been charged to full capacity to obtain the full charge capacity of the battery;

[0018] Obtaining the remaining capacity and cell voltage of the battery during discharge;

[0019] Obtaining a remaining capacity percentage of the battery based on the remaining capacity and the full charge capacity;

[0020] A mapping relationship between the remaining capacity and the cell voltage is established based on the remaining capacity percentage.

[0021] In combination with the first aspect, the method for constructing an update label based on a mapping relationship between a remaining capacity of a battery and a cell voltage during a discharge process includes:

[0022] Determining a plurality of update intervals of the battery during a discharge process based on the remaining capacity percentage;

[0023] The maximum value of the cell voltage in each update interval is determined as the update tag.

[0024] In combination with the first aspect, the method for constructing an update label based on a mapping relationship between the remaining capacity of the battery and the cell voltage during the discharge process further includes:

[0025] Determining that the battery has not reached saturation after multiple charges, and obtaining a plurality of remaining capacities of the battery during multiple discharges;

[0026] The cell voltage corresponding to the maximum value of the plurality of remaining capacities is used as the update label.

[0027] In combination with the first aspect, after the battery is discharged, the method further includes:

[0028] Determine the update interval of the cell voltage after the battery is discharged;

[0029] The corresponding update tag is determined based on the update interval.

[0030] In combination with the first aspect, the method further includes:

[0031] Determine that the cell voltage decreases by t after the battery is fully charged;

[0032] Subtract t from the cell voltages corresponding to all the update tags;

[0033] Among them, 0<t≤1.0V.

[0034] In combination with the first aspect, the method for constructing an update label based on a mapping relationship between the remaining capacity of the battery and the cell voltage during the discharge process further includes:

[0035] Determining the cell voltage of the battery during discharge based on the output current of the battery;

[0036] Determining a plurality of update intervals of the battery based on the output current, the cell voltage, and the remaining capacity percentage;

[0037] The maximum value of the cell voltage in each update interval is determined as the update tag.

[0038] In a second aspect, a battery capacity updating system is provided, the system comprising:

[0039] A monitoring module, wherein the monitoring module is configured to monitor the remaining capacity, cell voltage and discharge capacity of the battery during discharge;

[0040] A construction module, wherein the construction module is configured to construct an update tag based on a mapping relationship between the remaining capacity and the cell voltage;

[0041] A calculation module, wherein the calculation module is configured to obtain a full charge capacity of the battery based on the discharge capacity and the update tag;

[0042] The discharge capacity is accumulated by the monitoring module when the battery is discharged.

[0043] In a third aspect, an electronic device is provided, comprising a memory and a processor; the memory is used to store a computer program; the processor is used to implement a battery capacity updating method as described in any one of the first aspects when executing the computer program.

[0044] One of the above technical solutions has the following advantages or beneficial effects:

[0045] The present application provides a method for updating battery capacity, the method comprising: constructing an update label based on the mapping relationship between the remaining capacity of the battery during discharge and the cell voltage; obtaining the full charge capacity of the battery based on the accumulated discharge capacity of the battery at the end of discharge and the update label. The method provided by the present application obtains an update label by constructing a mapping relationship between the remaining capacity of the battery during discharge and the cell voltage, and obtains the full charge capacity according to the update label and the discharge capacity calculation, thereby realizing the calculation and update of the full charge capacity of the battery when it is not fully discharged, avoiding the situation where the full charge capacity of the battery cannot be updated and the error becomes larger and larger.

[0046] The present application provides a battery capacity update system, the system includes: a monitoring module, the monitoring module is configured to monitor the remaining capacity, cell voltage and discharge capacity of the battery during the discharge process; a construction module, the construction module is configured to construct an update label based on the mapping relationship between the remaining capacity and the cell voltage; an operation module, the operation module is configured to obtain the full charge capacity of the battery based on the discharge capacity and the update label; wherein the discharge capacity is accumulated by the monitoring module at the end of the battery discharge. The system provided by the present application monitors the remaining capacity and cell voltage of the battery during the discharge process, and constructs an update label based on the mapping relationship between the two, thereby calculating the full charge capacity based on the update label and the discharge capacity, thereby realizing the calculation and update of the full charge capacity of the battery when it is not fully discharged, and improving the accuracy of the full charge capacity and the remaining capacity of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0048] Figure 1 A schematic diagram of a method for updating battery capacity provided in an embodiment of the present application;

[0049] Figure 2 A schematic diagram of a method for constructing an update tag provided in an embodiment of the present application;

[0050] Figure 3 A schematic diagram of a flow chart of a method for updating full charge capacity provided in an embodiment of the present application;

[0051] Figure 4 The intention of the construction method flow of the update tag provided in some other embodiments of the present application;

[0052] Figure 5 A block diagram of a battery capacity update system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. In the description of the present application, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0054] The full charge capacity (Full Charge Capacity, FCC) of the battery is used to reflect the amount of electricity inside the battery after it is fully charged. The current method for calculating the full charge capacity of the battery usually includes the following steps: 1) Determine whether the battery is in a fully charged state; 2) From the beginning of discharge, count the capacity of the battery from full charge (i.e. 100% charge) to full discharge (i.e. 0% charge), and this capacity is C; 3) Among them, the full charge capacity FCC is equal to the capacity C. However, the relevant technical personnel of this application have noticed that in actual use, due to factors such as customer usage habits and usage scenarios, the battery has not been able to reach the full discharge condition during use, resulting in the battery's full charge capacity has not been updated, which in turn leads to the battery's current capacity (Relative State Of Charge, RSOC) The error is getting bigger and bigger, affecting the user experience. The current capacity of the battery is calculated by the remaining capacity (Remaining Capacity, RC) and the full charge capacity FCC to obtain the current capacity, and the calculation formula is: RSOC=RC / FCC. In real life, taking laptops as an example, when RSOC is less than 5% or 10%, the laptop system will automatically enter sleep mode to save power. Therefore, it is difficult for the laptop to reach full discharge conditions, which also causes the battery to be unable to update the FCC.

[0055] The specific implementation methods of the present application are further described below through the examples:

[0056] like Figures 1 to 4 As shown, an embodiment of the present application provides a method for updating battery capacity, the method comprising:

[0057] S1: Construct an update label based on the mapping relationship between the remaining capacity of the battery and the cell voltage during the discharge process.

[0058] like Figure 2 As shown, the method steps include:

[0059] S101: Acquire a full charge signal when the battery is fully charged.

[0060] Specifically, select a charger or charging device that is compatible with the battery type and specifications. Connect the battery to the charging device correctly. Make sure the connection is firm and correct to avoid unnecessary risks. Set the charging parameters of the charging device, such as charging current and charging voltage, according to the type and specifications of the battery. Make sure that the selected charging parameters are consistent with the recommendations and regulations of the battery manufacturer. During the charging process, monitor the charging status of the battery through the indicator light, display or other indicators of the charging device, fuel gauge or battery itself. Generally speaking, when the battery is charged to saturation, the charging device or fuel gauge will send a full charge signal. Once the full charge signal is received, the battery can be disconnected from the charger to avoid overcharging and damage to the battery.

[0061] S102: enabling updating of tags in response to the acquired full charge signal.

[0062] Specifically, after the battery is fully charged and a full charge signal is obtained, the system enables the update tag, even if the update tag is in an activated state. It is understandable that when the update tag is in an activated state, if the battery meets the conditions specified by the update tag during the discharge process, the system will execute the corresponding steps; and when the update tag is in a silent state, even if the battery meets the conditions specified by the update tag during the discharge process, the system will not execute the corresponding operation. By enabling the activation state of the update tag, the timing of the battery's update of the full charge capacity can be controlled, thereby avoiding frequent updates of the battery's full charge capacity. In the process of discharging the battery, multiple update tags will be passed. If each update tag updates the full charge capacity, frequent updates of the full charge capacity may cause the current capacity to frequently jump during the discharge process. Therefore, after the battery is fully charged and the full charge signal is obtained, the update tag is enabled to ensure that the full charge capacity is updated only once in a discharge cycle.

[0063] S103: updating the full charge capacity of the battery based on the enabled update tag and the discharge capacity.

[0064] like Figure 3 As shown, the method steps include:

[0065] S1031: Determine the remaining capacity percentage of the battery based on the enabled update tag.

[0066] Specifically, the update tag is used to characterize the relationship between the cell voltage and the remaining capacity or the percentage of the remaining capacity of the battery. The cell voltage of the battery refers to the potential difference generated by the electrochemical reaction inside the battery. The cell voltage can be used as an indication of the battery power, but it cannot be used as a completely accurate way to measure the power because the voltage may change due to factors such as load, temperature and battery chemical reaction during the use of the battery. The remaining capacity of the battery refers to the amount of power that has not been used in the battery. It indicates the available energy that the battery can still provide. The remaining capacity can be expressed in terms of charge or percentage. The remaining capacity is usually measured by monitoring parameters such as current, voltage or charge. It should be noted that the relationship between the cell voltage and the remaining capacity is nonlinear and is affected by many factors. When the battery is discharged, the cell voltage will gradually decrease, but the rate of decrease is not linear. When the battery capacity is close to exhaustion, the cell voltage may drop sharply. Therefore, the remaining capacity of the battery can only be roughly estimated by the battery voltage, and there may be errors. However, if the battery is discharged under the same conditions, the cell voltage and the remaining capacity can maintain a one-to-one correspondence, so the update tag can be constructed by relying on this mapping relationship.

[0067] It is worth noting that the update tag is generally determined according to the corresponding percentage of the remaining capacity, as shown in Table 1 below, which is a mapping relationship between the remaining power and the cell voltage provided in the embodiment of the present application. When the battery is fully charged, the cell voltage is approximately 4.40V, and when the battery power is 0, the cell voltage is the minimum, and the cell voltage is 3.00V.

[0068] Table 1

[0069]

[0070] It can be seen from Table 1 above that the various percentages of remaining capacity of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% and 90% are used as update labels of the batteries in the embodiments of the present application, and the cell voltages corresponding to the various percentages of remaining capacity are used as the basis for determining whether to update the labels. That is, during the discharge of the battery, the cell voltage is monitored in real time. When the monitored cell voltage is 4.2V, it can be seen that the corresponding remaining capacity percentage is 80%. When the monitored cell voltage is 3.6V, the corresponding remaining capacity percentage is 20%, and so on.

[0071] S1032: Obtaining a discharge capacity percentage of the battery based on the remaining capacity percentage.

[0072] Specifically, the remaining capacity percentage of a battery refers to the ratio between the amount of power that has not been used and the total capacity of the battery, usually expressed as a percentage (for example, the remaining capacity is 50%). This indicates how much capacity is available in the battery. The discharge capacity percentage of a battery refers to the ratio between the amount of power that has been used and the total capacity of the battery, also expressed as a percentage. It indicates the proportion of power that has been discharged from the battery to the total capacity. Therefore, after the remaining capacity percentage is known, the discharge capacity percentage can be calculated based on the principle that the sum of the remaining capacity percentage and the discharged capacity percentage is 100%. If the remaining capacity percentage is 40%, the discharge capacity percentage is 60%.

[0073] S1033: Divide the discharge capacity by the discharge capacity percentage to obtain the full charge capacity.

[0074] Specifically, discharge capacity refers to the amount of electricity that the battery has used, and the discharge capacity percentage is the proportional relationship between the discharge capacity and the total capacity, usually expressed as a percentage. When the discharge capacity and the discharge capacity percentage are known, the full charge capacity can be calculated by calculation. The formula can be expressed as: full charge capacity = discharge capacity / (discharge capacity percentage / 100). By dividing the discharge capacity by the ratio of the discharge capacity percentage, an estimate of the full charge capacity can be obtained. The full charge capacity refers to the maximum amount of electricity that the battery can hold after it is fully charged, that is, the maximum amount of charge that the battery can store and release.

[0075] In an embodiment of the present application, a method for constructing a mapping relationship between the remaining capacity and the cell voltage includes: discharging the battery that is charged to saturation to obtain the full charge capacity of the battery; obtaining the remaining capacity and the cell voltage of the battery during the discharge process; obtaining the remaining capacity percentage of the battery based on the remaining capacity and the full charge capacity; and constructing a mapping relationship between the remaining capacity and the cell voltage based on the remaining capacity percentage. Specifically, after the battery is charged to saturation, the remaining capacity and the cell voltage change values ​​during the process of discharging the battery from a saturated state to emptying are recorded by a fuel gauge. And the remaining capacity percentage is corresponded to the cell voltage value, so as to construct a mapping relationship between the remaining capacity percentage and the cell voltage. It is worth noting that the remaining capacity percentage of the battery is usually a point value (that is, when the remaining capacity percentage is 80%, the actual remaining capacity is 80%-80.99%), and the cell voltage corresponding to the remaining capacity percentage is usually a range value, such as the cell voltage value corresponding to the remaining capacity percentage of 80% is 4.2V-4.21V. Therefore, 4.2V and 4.21V can be used as the upper and lower limits of the determination voltage of the update tag, respectively.

[0076] In an embodiment of the present application, a method for constructing an update label based on a mapping relationship between the remaining capacity of a battery during discharge and the cell voltage includes: determining multiple update intervals of the battery during discharge based on the remaining capacity percentage; and determining the maximum value of the cell voltage in each update interval as an update label. Specifically, after obtaining the mapping relationship between all the remaining capacity percentages and the cell voltages, the battery power is divided into multiple update intervals from 0 to 100, and can be divided into multiple update intervals as needed, and the values ​​separated by each update interval can be the same or different. For example, when divided into 5 update intervals and the numerical intervals are the same, the 5 update intervals are 0-20%, 20-40%, 40-60%, 60-80% and 80-100% respectively. The remaining capacity of the battery can be better monitored by average division to avoid the battery from being unable to update for a long time. Or divided into 5 update intervals and the numerical intervals are different, the 5 update intervals are 0-10%, 10-20%, 20-50%, 50-80% and 80-100% respectively. Since there is a flat area in the discharge process of the battery, and the flat area is generally located in the middle area of ​​the discharge process, in the flat area, the change of the cell voltage with the decrease of the remaining capacity is very small, so it is difficult to obtain the specific value of the cell voltage by the change of the remaining capacity. The flat area of ​​the battery can be avoided by non-uniform division, thereby avoiding inaccurate data obtained by the battery, thereby affecting the accuracy of the full charge capacity. It is worth noting that the number of update intervals can be any value from 2 to 20. Preferably, the number of update intervals is 10. The update interval generally includes two endpoints, corresponding to the minimum and maximum values ​​of the remaining capacity or cell voltage, respectively. By using the maximum value of the remaining capacity as the update label of the update interval, the size of the cell voltage can be used to quickly determine in which update interval the battery discharge ends.

[0077] like Figure 4As shown, in some other embodiments of the present application, the method for constructing an update tag based on the remaining capacity of the battery also includes: determining that the battery has not been fully charged for multiple times, obtaining multiple remaining capacities of the battery in multiple discharges; and using the cell voltage corresponding to the maximum value of the multiple remaining capacities as the update tag. Specifically, in some cases, the user cannot ensure that the battery can be fully charged every time when using the battery. When the battery cannot be fully charged, the update tag of the battery cannot be enabled. If this situation occurs multiple times, the problem that the full charge capacity of the battery cannot be updated all the time will occur. Therefore, in order to avoid such problems, a corresponding threshold is set to determine whether the battery has not been fully charged for multiple times in a row. Usually, the threshold is 3-10 times. If the battery is not fully charged for more than 10 times in a row, the maximum remaining capacity in each discharge process of the first 10 times is recorded, and the cell voltage corresponding to the maximum remaining capacity is used as the update tag and enabled. When the battery is still not saturated for the next charge and the remaining capacity of the battery after the discharge is less than the update tag, the cell voltage and remaining capacity corresponding to the update tag are calculated to obtain the full charge capacity, and the full charge capacity is updated.

[0078] In an embodiment of the present application, the method also includes: determining that the cell voltage after the battery is fully charged is reduced by t; reducing the cell voltage corresponding to all update labels by t; wherein 0<t≤1.0V. Specifically, after the battery is used for a period of time through cyclic charge and discharge, the internal impedance of the battery will increase, resulting in a decrease in the full charge capacity of the battery, and the corresponding cell voltage will also decrease. Therefore, when the cell voltage of the battery decreases, in order to avoid an error between the corresponding relationship between the cell voltage in the update label and the remaining capacity, resulting in an inaccurate update of the full charge capacity, the cell voltage value in each update label is also reduced in the same manner. For example, if the cell voltage after the battery is fully charged is reduced by 0.3V compared to the original cell voltage, the cell voltage in all update labels will be reduced by 0.3V accordingly to ensure that the remaining capacity and the cell voltage correspond to each other.

[0079] In an embodiment of the present application, the method for constructing an update label based on the remaining capacity of the battery also includes: determining the cell voltage of the battery during discharge based on the output current of the battery; determining multiple update intervals of the battery based on the output current, cell voltage and remaining capacity percentage; and determining the maximum value of the cell voltage in each update interval as the update label. Specifically, different batteries will have deviations in the output current when connected to different responsibilities, and the current size is related to the size of the cell voltage. Therefore, when constructing the update label, multiple versions of the mapping relationship between the cell voltage and the remaining capacity are constructed according to the size of the output current, so as to facilitate query.

[0080] Table 2 shows the mapping relationship between the remaining capacity and the cell voltage when the battery is connected to load No. 1 and the output current of the battery is 0.1C.

[0081] Table 2

[0082]

[0083] Table 3 shows the mapping relationship between the remaining capacity and the cell voltage when the battery is connected to load No. 2 and the output current of the battery is 0.5C.

[0084] Table 3

[0085]

[0086] It can be understood that a curve relationship diagram of the remaining capacity and the cell voltage can be established based on the established Tables 2 and 3, and the corresponding remaining capacity and cell voltage when the output current of the battery is less than 0.1C, greater than 0.5C or between 0.1C and 0.5C can be fitted based on the curve relationship diagram, thereby facilitating the battery to quickly determine the update label according to the output current size and calculate the full charge capacity.

[0087] S2: Obtaining the full charge capacity of the battery based on the accumulated discharge capacity of the battery at the end of discharge and the updated tag.

[0088] Specifically, after the discharge capacity and the update tag are determined, the full charge capacity of the battery can be obtained according to the corresponding calculation formula, which is:

[0089] FCC = discharge capacity / (1-remaining capacity percentage);

[0090] For example, the cumulative discharge capacity from full charge to the update label is C = 3000mAH, and the remaining capacity percentage corresponding to the update label is 10%; then FCC = 3000 / (1-10%) = 3333mAH (rounded value).

[0091] like Figure 5 As shown, an embodiment of the present application also provides a battery capacity update system, the system comprising: a monitoring module, a building module and a calculation module; the monitoring module is configured to monitor the remaining capacity, cell voltage and discharge capacity of the battery during discharge; the building module is configured to construct an update label based on a mapping relationship between the remaining capacity and the cell voltage; the calculation module is configured to obtain the full charge capacity of the battery based on the discharge capacity and the update label; wherein the discharge capacity is accumulated by the monitoring module at the end of battery discharge.

[0092] An embodiment of the present application also provides an electronic device, including a memory and a processor; the memory is used to store a computer program; the processor is used to implement a battery capacity updating method provided in any of the above embodiments when executing the computer program.

[0093] The above is a detailed introduction to a battery capacity updating method, system and electronic device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for updating battery capacity, characterized in that: The method comprises: Get the full charge signal when the battery is charged to saturation; enabling updating of a tag in response to the acquired full charge signal; The update tag is constructed based on the mapping relationship between the remaining capacity of the battery during the discharge process and the cell voltage, wherein a plurality of update intervals of the battery during the discharge process are determined based on the remaining capacity percentage, and the maximum value of the cell voltage in each update interval is determined as the update tag; When it is determined that the multiple charges of the battery have not reached saturation, obtaining a plurality of the remaining capacities of the battery during the multiple discharges; Using the cell voltage corresponding to the maximum value of the plurality of remaining capacities as the update label; The full charge capacity of the battery is obtained based on the discharge capacity accumulated by the battery at the end of discharge and the update tag, and the full charge capacity is obtained by dividing the discharge capacity by the discharge capacity percentage.

2. The method for updating battery capacity according to claim 1, characterized in that: The method further comprises: When the battery is charged to full capacity, the charging device will send a full charge signal.

3. The method for updating battery capacity according to claim 2, characterized in that: The method of enabling updating a tag in response to the acquired full charge signal further includes: Determining a remaining capacity percentage of the battery based on the enabled update tag; A discharge capacity percentage of the battery is obtained based on the remaining capacity percentage.

4. The method for updating battery capacity according to claim 1, characterized in that: The method for constructing the mapping relationship between the remaining capacity and the cell voltage includes: Discharging the battery that has been charged to full capacity to obtain the full charge capacity of the battery; Obtaining the remaining capacity and cell voltage of the battery during discharge; Obtaining a remaining capacity percentage of the battery based on the remaining capacity and the full charge capacity; A mapping relationship between the remaining capacity and the cell voltage is established based on the remaining capacity percentage.

5. The method for updating battery capacity according to claim 1, characterized in that: After the battery discharge is completed, the method further includes: Determine the update interval of the cell voltage after the battery is discharged; The corresponding update tag is determined based on the update interval.

6. The method for updating battery capacity according to claim 4, characterized in that: The method further comprises: Determine that the cell voltage decreases by t after the battery is fully charged; Subtract t from the cell voltages corresponding to all the update tags; Among them, 0<t≤1.0V.

7. The method for updating battery capacity according to claim 4, characterized in that: The step of constructing an update label based on the mapping relationship between the remaining capacity of the battery and the cell voltage during the discharge process further includes: Determining the cell voltage of the battery during discharge based on the output current of the battery; Determining a plurality of update intervals of the battery based on the output current, the cell voltage, and the remaining capacity percentage; The maximum value of the cell voltage in each update interval is determined as the update tag.

8. A battery capacity updating system, characterized in that: According to the method for updating the battery capacity as claimed in any one of claims 1 to 7, the system comprises: A monitoring module, wherein the monitoring module is configured to monitor the remaining capacity, cell voltage and discharge capacity of the battery during discharge; A construction module, wherein the construction module is configured to construct an update tag based on a mapping relationship between the remaining capacity and the cell voltage; A calculation module, wherein the calculation module is configured to obtain a full charge capacity of the battery based on the discharge capacity and the update tag; The discharge capacity is accumulated by the monitoring module when the battery is discharged.

9. An electronic device, characterized in that: The invention comprises a memory and a processor; the memory is used to store a computer program; the processor is used to implement the battery capacity updating method as described in any one of claims 1 to 7 when executing the computer program.

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