CN116359755A - State of charge correction method, electronic device, and storage medium - Google Patents
State of charge correction method, electronic device, and storage medium Download PDFInfo
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The application provides a charge state correction method, electronic equipment and a storage medium, which belong to the technical field of new energy, and comprise the following steps: when the battery is in a discharging state, obtaining the discharging current of the battery; determining a reference voltage of the battery according to the discharge current and the current threshold value of the battery, wherein the reference voltage is the discharge voltage of the battery when the charge state of the battery is reduced to a preset threshold value; acquiring the current battery voltage and the current state of charge of the battery; and if the battery voltage is smaller than the reference voltage and the state of charge is larger than the preset threshold, correcting the state of charge according to the preset threshold. According to the embodiment of the application, after the current battery voltage is determined to be smaller than the reference voltage and the state of charge is greater than the preset threshold, the current state of charge can be determined to be unmatched, and finally the state of charge is corrected according to the preset threshold so that the current state of charge is matched with the state of charge which can be actually used.
Description
Technical Field
The application belongs to the technical field of new energy, and particularly relates to a charge state correction method, electronic equipment and a storage medium.
Background
When the electronic equipment with the battery discharges, the current state of charge and the residual service time of the electric quantity can be displayed on the electronic equipment.
However, in the related art, the remaining usage time of the state of charge and the amount of electricity displayed on the electronic device is not accurate, so that the user cannot plan to use the electronic device according to the displayed state of charge and the remaining usage time of the amount of electricity, and experience is poor.
Disclosure of Invention
In view of this, the present application provides a method for correcting a state of charge, an electronic device, and a storage medium, which can enable a current state of charge on the electronic device to be matched with an actually usable state of charge, where the current state of charge can be mapped to obtain an accurate remaining usage time, so that a user can plan to use the electronic device.
The first aspect of the present application provides a method for correcting a state of charge, the method for correcting a state of charge including:
when a battery is in a discharging state, obtaining the discharging current of the battery;
determining a reference voltage of the battery according to the discharge current and the current threshold value of the battery, wherein the reference voltage is the discharge voltage of the battery when the charge state of the battery is reduced to a preset threshold value;
Acquiring the current battery voltage and the current state of charge of the battery;
and if the battery voltage is smaller than the reference voltage and the state of charge is larger than the preset threshold, correcting the state of charge according to the preset threshold.
When the battery is in a discharging state, the discharging current of the battery is obtained, the discharging voltage of the battery when the state of charge of the battery is reduced to a preset threshold value can be determined according to the discharging current of the battery and the current threshold value, namely, the reference voltage is determined, and further, the state of charge can be corrected in advance or not according to the reference voltage. After determining the reference voltage of the battery, then obtaining the current battery voltage and the state of charge of the battery, if the current battery voltage is determined to be smaller than the reference voltage, indicating that the current battery voltage is lower, the situation that the current state of charge is not matched with the state of charge which can be actually used possibly occurs, then determining that the current state of charge is not matched with the state of charge which can be actually used after determining that the state of charge is larger than a preset threshold value, and finally correcting the state of charge according to the preset threshold value to enable the current state of charge to be matched with the state of charge which can be actually used, wherein the residual use time is accurate.
Some embodiments of the first aspect, the determining the reference voltage of the battery according to the discharge current of the battery and the current threshold value includes:
and if the discharge current is smaller than the current threshold value, determining a first preset voltage as a reference voltage.
In this way, when the discharge current is smaller than the current threshold, the first preset voltage is determined to be the reference voltage, so that the current state of charge can be corrected to the state of charge which can be actually used.
Some embodiments of the first aspect, the determining the reference voltage of the battery according to the discharge current of the battery and the current threshold value includes:
and if the discharge current is greater than the current threshold, acquiring the lowest cell voltage of the battery, wherein the lowest cell voltage is the lowest value of voltages of all cells in the battery, and determining the reference voltage according to the lowest cell voltage and the discharge current, wherein the reference voltage is greater than the first preset voltage.
Therefore, when the discharge current is larger than the current threshold, the reference voltage is determined according to the lowest cell voltage and the discharge current, the reference voltage can be dynamically changed according to the change of the lowest cell voltage and the discharge current, and meanwhile, the reference voltage is larger than the first preset voltage.
Some embodiments of the first aspect, the correcting the state of charge according to the preset threshold value includes:
calculating a difference between the state of charge and the preset threshold,
and correcting the state of charge according to the difference value.
Thus, the difference value is obtained according to the state of charge and the preset threshold value, and the current state of charge is corrected according to the difference value, so that the current states of charge with different magnitudes can be corrected into the state of charge which can be actually used in the preset correction time.
Some embodiments of the first aspect, the correcting the state of charge according to the difference value includes:
acquiring a corresponding correction multiplying power according to the difference value, wherein the correction multiplying power is increased along with the increase of the difference value;
and correcting the state of charge according to the correction multiplying power.
Some embodiments of the first aspect, the correcting the state of charge according to the correction magnification includes:
calculating the discharge electric quantity of the battery according to the discharge current;
correcting the discharge electric quantity according to the correction multiplying power;
and calculating according to the corrected discharge electric quantity, the full electric quantity of the battery and the state of charge to obtain the corrected state of charge.
Some embodiments of the first aspect, the method further comprises:
if the battery voltage is greater than the reference voltage, not correcting the state of charge; or alternatively
And if the battery voltage is smaller than the reference voltage and the state of charge is smaller than the preset threshold, not correcting the state of charge.
Thus, if the current battery voltage is greater than the reference voltage, it indicates that the current battery voltage is higher, and the possibility that the displayed state of charge is not matched with the practically usable state of charge is lower, so that the current state of charge may not be corrected. If the current battery voltage is smaller than the reference voltage, although the situation that the displayed state of charge is not matched with the practically usable state of charge may occur, however, the current state of charge is smaller than the preset threshold, which indicates that the current state of charge at this time accords with the situation that the battery voltage is lower, and the current state of charge may not be corrected.
Some embodiments of the first aspect, the determining the reference voltage from the lowest cell voltage and the discharge current comprises:
determining a voltage correction amplitude according to the discharge current;
And obtaining the reference voltage according to the sum of the lowest cell voltage and the voltage correction value.
Therefore, the reference voltage can be continuously changed on the basis of the lowest cell voltage according to the change of the discharge current, and the reference voltage is dynamically adjusted.
A second aspect of the present application provides an electronic device, comprising:
a battery;
a processor; and
a memory for storing executable instructions of the processor;
wherein execution of the executable instructions by the processor causes the electronic device to perform the method of correcting a state of charge of a battery described above.
Thus, when the battery of the electronic equipment is in a discharging state, the processor of the electronic equipment obtains the discharging current of the battery, and according to the discharging current of the battery and the current threshold value, the discharging voltage of the battery when the state of charge of the battery is reduced to a preset threshold value can be determined, namely the reference voltage is determined, so that the state of charge can be corrected in advance or not according to the reference voltage. After determining the reference voltage of the battery, the processor then acquires the current battery voltage and the state of charge of the battery, if the current battery voltage is determined to be smaller than the reference voltage, which indicates that the current battery voltage is lower, the situation that the current state of charge is not matched with the state of charge which can be actually used possibly occurs, after determining that the state of charge is greater than a preset threshold value, the processor can determine that the current state of charge is not matched with the state of charge which can be actually used, and finally, the processor corrects the state of charge according to the preset threshold value so that the current state of charge is matched with the state of charge which can be actually used, so that the residual use time displayed is accurate. Through the embodiment, the residual use time of the battery can be accurately displayed, and the use requirement of a user is met.
A third aspect of the present application provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described method of correcting a state of charge of a battery.
The effects of the third aspect of the present application are similar to those of the second aspect, and are not described in detail herein.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 2 is an application scenario diagram of a method for correcting a battery state of charge according to an embodiment of the present application;
fig. 3 is an application scenario diagram of a method for correcting a battery state of charge according to another embodiment of the present disclosure;
fig. 4 is a flowchart of a method for correcting a battery state of charge according to an embodiment of the present disclosure;
fig. 5 is a flowchart of a method for correcting a battery state of charge according to another embodiment of the present disclosure;
fig. 6 is a flowchart of a method for correcting a battery state of charge according to another embodiment of the present disclosure;
fig. 7 is a flowchart of a method for correcting a battery state of charge according to another embodiment of the present disclosure;
fig. 8 is a flowchart of a method for correcting a battery state of charge according to another embodiment of the present disclosure;
fig. 9 is a flowchart of a method for correcting a battery state of charge according to another embodiment of the present disclosure;
Fig. 10 is a flowchart of a method for correcting a battery state of charge according to another embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The term "plurality" as used herein refers to two or more. In addition, it should be understood that in the description of this application, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not for indicating or implying any relative importance or order.
In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Some embodiments will be described below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict. In addition, those of ordinary skill in the art will recognize that the above embodiments are presented for purposes of illustration only and are not intended to be limiting, and that suitable modifications and variations of the above embodiments are within the scope of the disclosure of the present application.
The following briefly describes the case of the related art:
when an electronic device provided with a battery, such as an energy storage device, a refrigerator or an air conditioner, discharges, there are problems that a State of Charge (SOC) displayed on the electronic device is not matched with an actual remaining use time due to an abrupt change of a discharge current, and the remaining use time of the SOC map. For example, the state of charge displayed on the display screen of the electronic device is 5%, and the remaining use time is 2h, at this time, the user continues to use the electronic device, after the user uses the electronic device for 6 minutes, the electronic device is powered off suddenly, and the user cannot continue to use the electronic device, so that user experience is affected.
In order to avoid that each cell of the battery in the electronic device continues to discharge after being lower than the undervoltage, the overall service life of the battery is affected, and the lowest value of voltages of all cells in the battery is generally used as the battery voltage of the whole battery. Meanwhile, in order to match the remaining use time with the actual remaining use time, when the battery voltage is less than or equal to the voltage when the battery is first emptied, that is, less than the initial emptying point voltage, the state of charge of the electronic equipment is corrected to a preset value according to a preset speed. That is, the initial discharge point voltage is used as a judgment value for whether to correct the current positive state of charge, and the correction speed is preset, so that the transition from one state of charge to the other state of charge cannot be performed directly. For example, the voltage of the initial emptying point is 3.2V, the preset value of the state of charge is 1%, when the electronic device detects that the current battery voltage is less than or equal to 3.2V and the state of charge shows 7%, 7% is corrected to 1% according to the preset speed, and the jump from 7% to 1% cannot be directly performed.
When the discharging current of the battery is too large, the discharging speed is increased, the time for the battery voltage to reach the undervoltage point is short, if the initial discharging point voltage is still used as the judging value for judging whether to correct the state of charge, the initial discharging point voltage is close to the voltage value of the undervoltage point, and the correction of the state of charge cannot jump. Therefore, the current battery voltage approaches the undervoltage point voltage, and the state of charge is not corrected to the preset value, so that the displayed state of charge and the actual usable state of charge have large differences, namely the displayed residual use time is not matched with the actual residual use time, and the experience of a user in using the electronic equipment is affected. For example, the under-voltage point is 3.1V, the battery suddenly supplies power to a high-power load, the discharging current is increased, the time for the battery voltage to reach the under-voltage is shortened, if the initial discharging point voltage is still 3.2V, if the initial discharging point voltage is still started to correct, the corrected state of charge is 5% when the battery voltage reaches the under-voltage point of 3.1V due to incapacitation, the corrected state of charge is not consistent with 1% of the actual usable state of charge, and no time is required to correct the state of charge to 0%.
In view of this, the present application provides a method for correcting a state of charge, an electronic device, and a storage medium, which can enable a state of charge displayed on the electronic device to be matched with an actually usable state of charge, where the displayed state of charge can be mapped to obtain an accurate remaining usage time, so that a user can accurately schedule the remaining usage time to use the electronic device.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application, the electronic device 100 includes a battery 102 and a battery management system (Battery Management System, BMS) unit 101, the battery 102 is configured to provide power to a load, the battery management system unit 101 is configured to control the battery 102 to provide power to the load, wherein a state in which the battery 102 supplies power to the load is a discharge state, an output current of the battery 102 is a discharge current when the battery 102 supplies power to the load, and a voltage generated by the discharge current is a discharge voltage. The electronic device 100 includes an energy storage device or is a device having a battery 102 such as an air conditioner, a refrigerator, a computer, or the like. The load includes electrical consumers and power devices of the electronic device 100.
Fig. 2 is an application scenario diagram of a state of charge correction method, which is applied to an energy storage device. The energy storage device 110 is electrically connected to the electrical consumer 200, and the electrical consumer 200 includes an induction cooker, an electric lamp, a sweeper, or other devices that operate with respect to consuming electrical energy. After the energy storage device 110 is electrically connected with the electric equipment 200, the battery management system unit 101 of the energy storage device 110 controls the battery 102 to supply power to the electric equipment 200, at this time, the battery 102 is in a discharging state, and the battery 102 of the energy storage device 110 inputs a discharging current to the electric equipment 200 to generate a discharging voltage. The battery management system unit 101 of the energy storage device 110 obtains the discharge current of the battery 102, and then determines the discharge voltage of the battery 102 when the state of charge of the battery 102 drops to a preset threshold, that is, determines the reference voltage of the battery 102, according to the discharge current of the battery 102 and the current threshold. Then, the current battery voltage and the state of charge of the battery 102 are obtained, if the current battery voltage is determined to be smaller than the reference voltage and the state of charge is greater than the preset threshold, the state of charge is corrected according to the preset threshold, and the state of charge displayed by the energy storage device 110 is the corrected state of charge.
Fig. 3 is another application scenario diagram of a state of charge correction method, where the electronic device 100 further includes a power device 120, the battery 102 is electrically connected to the power device 120, the power device 120 of the electronic device 100 includes a central processing unit (central processing unit, CPU), a memory, a display screen, and the like, and the battery 102 is used to supply power to the power device 120. The battery management system unit 101 of the electronic device 100 may perform the steps of the battery management system unit 101 of the energy storage device 110 as shown in fig. 2 to modify the current state of charge of the battery to obtain a displayed state of charge. In the present embodiment, the electronic apparatus 100 may be a removable air conditioner having a battery, a removable refrigerator having a battery, or the like.
Referring to fig. 4, fig. 4 is a flowchart of a method for correcting a state of charge according to an embodiment of the present application, where the method for correcting a state of charge of the present application may be applied to the electronic device 100, and may specifically be applied to the battery management system unit 101 of the electronic device 100. In some embodiments, the method for correcting the state of charge may also be applied to a controller having a related processing function in the electronic device. Or the method for correcting the state of charge can be applied to an independent functional module, the functional module has relevant processing capability, the functional module can be connected with the electronic equipment with the battery in a wired or wireless mode, and the functional module can acquire relevant data of the electronic equipment with the battery in a wired or wireless mode so as to execute the method for correcting the state of charge provided by the embodiment of the application.
Referring to fig. 4, the state of charge correction method includes the steps of:
step S101: when the battery is in a discharging state, a discharging current of the battery is obtained.
As described in connection with fig. 1, 2 and 3, the battery 102 being in a discharged state means that the battery 102 supplies power to the load. The discharge current is a current supplied to the load when the battery 102 supplies power to the load.
Step S102: and determining the reference voltage of the battery according to the discharge current of the battery and the current threshold value.
The current threshold may be used to determine whether the discharge current is too large, and may be set according to the relevant parameters of the electronic device 100 in this application. Specifically, the discharge current may increase or decrease due to the operating conditions of the electronic device 100. For example, when the battery 102 of the electronic device 100 supplies power to the load, if the required power of the load increases at a constant output voltage, the discharge current of the battery 102 increases accordingly, and if the required power of the load decreases, the discharge current of the battery 102 decreases accordingly.
At the same time, the excessive discharge current affects the time for the battery voltage of the battery to reach the initial drain point voltage. Specifically, when the discharge current is greater than the current threshold, it is indicated that the current level at this time shortens the time for the battery voltage to reach the initial drain point voltage, and when the discharge current is less than the current threshold, it is indicated that the current level at this time does not affect the time for the battery voltage to reach the initial drain point voltage.
The reference voltage refers to a discharge voltage corresponding to the battery 102 when a State of Charge (SOC) of the battery 102 drops to a preset threshold, and the reference voltage is greater than or equal to an initial discharge point voltage.
It will be appreciated that the battery management system unit 101 may determine the current discharge current situation of the battery 102 according to the discharge current and the current threshold of the battery 102, determine a corresponding reference voltage according to the current discharge current, and correct the state of charge of the energy storage device 110 or not correct the state of charge of the energy storage device 110 according to the corresponding reference voltage.
The preset threshold of the state of charge refers to a critical value of the state of charge of the battery 102, where the displayed state of charge may not match the actual usable state of charge, and the preset threshold of the state of charge may be 1%, 2%, 2.4%, or the like.
It can be appreciated that, in the embodiment of the present application, according to a preset threshold value and a reference voltage that can set a state of charge according to relevant parameters of the electronic device 100, the reference voltage can be used to determine whether the current battery voltage is close to the initial emptying point voltage, and the preset threshold value can be used to determine whether the current state of charge is an actually usable state of charge under the condition that the battery voltage is close to the initial emptying point voltage.
Step S103: the current battery voltage and state of charge of the battery are obtained.
The battery voltage refers to the current discharge voltage of the battery 102, and the current state of charge of the battery is the state of charge displayed by the display module of the battery.
Step S104: and if the battery voltage is smaller than the reference voltage and the state of charge is larger than the preset threshold, correcting the state of charge according to the preset threshold.
It will be appreciated that, since the reference voltage is slightly greater than or equal to the initial discharge point voltage, if the current battery voltage is less than the reference voltage, indicating that the current battery voltage is low, there may be a situation in which the displayed state of charge does not match the state of charge that can be actually used. Therefore, after determining that the current battery voltage is less than the reference voltage, the current state of charge and the preset threshold are further determined, if the current state of charge is greater than the preset threshold, it is indicated that the current state of charge displayed by the energy storage device 110 needs to be corrected, and the current state of charge displayed is corrected according to the preset threshold.
In this manner, when the battery 102 is in a discharged state, the battery management system unit 101 of the electronic device 100 acquires the discharge current of the battery 102, and can determine a reference voltage according to the discharge current of the battery 102 and the current threshold value, and the reference voltage can determine to correct the state of charge in advance or not in advance in combination with the discharge current of the battery 102. The battery management system unit 101, after determining the reference voltage of the battery 102, then acquires the current battery voltage and state of charge of the battery 102. In some embodiments, if the current battery voltage is less than the reference voltage, which indicates that the current battery voltage is low, a situation may occur in which the current state of charge does not match the actual state of charge, and when the current state of charge is greater than the preset threshold, it may be determined that the current state of charge does not match the actual state of charge. Therefore, when it is determined that the current battery voltage is less than the reference voltage and the state of charge is greater than the preset threshold, the battery management system unit 101 corrects the state of charge according to the preset threshold so as to match the current state of charge with the actual usable state of charge, that is, to match the remaining usage time displayed by the energy storage device 110 with the actual remaining usage time.
In some embodiments, referring to fig. 5, the state of charge correction method includes steps S201 to S204, and the specific details of step S201, step S203, and step S204 are described in the above embodiments with reference to the relevant expressions of step S101, step S103, and step S104, respectively. Wherein, in the present embodiment:
step S202 includes: if the discharge current is smaller than the current threshold value, determining the first preset voltage as the reference voltage.
The first preset voltage refers to the initial trip point voltage mentioned in the above embodiment.
It will be appreciated that in the case where the discharge current is less than the current threshold, the time when the current battery voltage reaches the initial drain point voltage is normal, and the initial drain point voltage may be directly used as the reference voltage. Because the reference voltage is equal to the initial empty point voltage, the state of charge does not need to be corrected in advance, i.e. the current state of charge is a practically usable state of charge.
In some embodiments, referring to fig. 6, the state of charge correction method includes steps S301 to S304, and step S301, step S303, and step S304 are specifically described in detail with reference to step S101, step S103, and step S104, respectively. In this embodiment, step S302 includes:
if the discharge current is greater than the current threshold, acquiring the lowest cell voltage of the battery, wherein the lowest cell voltage is the lowest value of the voltages of all cells in the battery, and determining a reference voltage according to the lowest cell voltage and the discharge current, wherein the reference voltage is greater than a first preset voltage.
Specifically, the battery 102 includes a plurality of cells, each having a corresponding cell voltage, where the cell voltage has the lowest value, which is the lowest cell voltage. For example, the battery 102 has three cells, namely, a first cell, a second cell and a third cell, where the voltage of the first cell is 3.2V, the voltage of the second cell is 3.4V, the voltage of the third cell is 3.25V, and the lowest value of the voltages of the three cells is 3.2V, so the lowest cell voltage is 3.2V of the first cell.
It will be appreciated that in the case where the discharge current is greater than the current threshold, the greater the discharge current of the battery, the shorter the time for the present battery voltage to reach the initial dump point voltage. Because the correction of the state of charge does not allow jump, if the initial discharge point voltage is still used as the judgment value of whether to correct the state of charge at this time, the correction time is too short, and the correct state of charge cannot be corrected to match with the state of charge which can be actually used. In the case that the discharge current is greater than the current threshold, a reference voltage greater than the initial trip point voltage is first determined. The set reference voltage is larger than the initial emptying point voltage, so that compared with the related art, the state of charge can be corrected in advance, the correction time of the state of charge is longer, the current state of charge can be corrected to the state of charge which can be used practically in time, and no jump of the state of charge occurs.
It will be appreciated that the reference voltage is determined based on the minimum cell voltage and the discharge current, and that the reference voltage may be dynamically varied based on variations in the minimum cell voltage and the discharge current to determine a dynamic reference voltage that is greater than the initial trip point voltage.
In some embodiments, referring to fig. 7, determining the reference voltage from the lowest cell voltage and the discharge current comprises the steps of:
step S401: a voltage correction amplitude is determined based on the discharge current.
Different discharge currents correspond to different voltage correction magnitudes, and therefore, after the discharge currents are acquired, the corresponding voltage correction magnitudes can be determined according to the discharge currents.
In some embodiments, determining the voltage correction amplitude from the discharge current may include the steps of:
s4011, acquiring a preset correction coefficient.
S4012, determining the voltage correction amplitude according to the absolute value of the product of the preset correction coefficient and the discharge current.
The mathematical expression of the voltage correction amplitude is I×k, wherein I represents the discharge current, k is a preset correction coefficient, and the correction coefficient can be preset. The mathematical expression indicates that the voltage correction amplitude is obtained by multiplying a preset correction coefficient k by the discharge current I. In one example, when the discharge current I is 0.5, a voltage correction amplitude of 0.5k may be obtained; when the discharge current I is 0.7, a voltage correction amplitude of 0.7k can be obtained.
Step S402: and calculating the sum of the minimum cell voltage and the voltage correction value to obtain the reference voltage.
In one example, the formula for deriving the reference voltage from the sum of the minimum cell voltage and the voltage correction value is as follows:
V＝V o +I×k
wherein V represents a reference voltage, V 0 Representing the lowest cell voltage, V 0 It can be obtained from parameters of the battery 102, i×k represents a voltage correction value, I is a discharge current. In some embodiments, K may be 0.002, i.e., when the discharge current is 1A, the reference voltage V is at the lowest cell voltage V 0 And increased by 2mV.
It will be appreciated that the reference voltage is continuously increased based on the minimum cell voltage as the discharge current increases while the battery 102 is in a discharged state, so as to be dynamically adjusted.
In some embodiments, the reference voltage is less than a preset upper limit, which is related to the cell voltage of the cell, and the single cell voltage is 3.3V, then the preset upper limit may be set to 3.2V.
It can be understood that the reference voltage is smaller than the preset upper limit value, so that the situation that the corrected state of charge is stopped at a certain value for a long time due to the overlong correction time after the state of charge is corrected in advance can be avoided. For example, the corrected state of charge remains at 1% for a long time. Meanwhile, the preset upper limit value is slightly larger than the initial emptying point voltage, so that the battery 102 can be corrected when the battery is emptied as much as possible.
Referring to fig. 8, in some embodiments, correcting the state of charge according to the preset threshold includes the steps of:
step S501: and calculating a difference value between the state of charge and a preset threshold value.
The battery 102 may have a continuously changing state of charge in a discharging state, so that a difference between each changed state of charge and a preset threshold value may be calculated, thereby obtaining a difference between each state of charge and the preset threshold value in the whole discharging process of the battery 102, and classifying the difference according to the difference.
The difference A is calculated according to the following formula:
A＝B SOC -C
wherein A represents a difference value, B SOC Represents the state of charge of the battery 102, C represents a preset threshold, and the formula represents the difference A as the state of charge B of the battery 102 SOC The preset threshold C is subtracted.
In one example, state of charge B of battery 102 SOC 6% and 1% of the preset threshold C, the difference a is 6% -1% =5%. From this calculation, the battery 102 classifies the difference values according to the difference values in the whole discharging process, wherein the difference values are more than 20% as a class, the difference values are less than or equal to 20% and more than 10% as a class, the difference values are less than or equal to 10% and more than 5% as a class, and the difference values are less than or equal to 5% and more than 1% as a class. The difference classification can be seen in table 1.
Step S502: and correcting the state of charge according to the difference value.
It can be understood that the corresponding states of charge are corrected according to the difference values of different magnitudes, and the states of charge of different magnitudes can be corrected to be states of charge which can be actually used within the same correction time.
In some embodiments, correcting the current state of charge based on the difference comprises the steps of:
s5021: and obtaining a corresponding correction multiplying power according to the difference value, wherein the correction multiplying power is increased along with the increase of the difference value.
After the difference value is calculated, the correction multiplying power corresponding to each category can be obtained according to the category of the difference value, so that the current charge states with different magnitudes can obtain the corresponding correction amplitude. The correction multiplying power corresponding to each category can be obtained through a related formula or experiment. In one example, the relationship between the difference class and the correction magnification can be seen in table 2, that is, the correction magnification corresponding to the difference of the first class is 4 times, the correction magnification corresponding to the difference of the second class is 3 times, the correction magnification corresponding to the difference of the third class is 2 times, and the correction magnification corresponding to the difference of the fourth class is 1.5 times.
In one example, it can be known from the correspondence of table 2 that when the calculated difference is 5%, the correction magnification is 1.5 times.
S5022: and correcting the current state of charge according to the correction multiplying power.
In the previous example, the current state of charge 6% is corrected according to the correction magnification of 1.5 times to be a practically usable state of charge.
In some embodiments, correcting the current state of charge according to the correction factor further comprises the steps of:
and S50221, calculating the discharge capacity of the battery according to the discharge current.
The discharge electric quantity refers to the electric quantity obtained by accumulating the discharge current in the discharge process. It can be understood that, during the discharging process from the initial discharging state to the current discharging state, the battery 102 always inputs the discharging current to the load, and the discharging current and the discharging time of the whole discharging process of the battery 102 are accumulated to obtain the discharging electric quantity of the battery 102.
And S50222, correcting the discharge electric quantity according to the correction multiplying power.
The corrected discharge capacity can be expressed by a mathematical expression kxi×t, where K is expressed as a correction magnification, I is expressed as a discharge current, and T is a discharge time. The mathematical expression shows that the corrected discharge electric quantity is obtained by multiplying the correction multiplying power K, the discharge current I and the discharge time T. In the above example, the corrected discharge capacity is 1.5i×t when the correction magnification K is 1.5 times. It can be appreciated that the discharge capacity corrected according to the correction magnification is closer to the capacity that the battery 102 has actually consumed during the entire discharge process.
And S50223, calculating the corrected state of charge according to the corrected discharge electric quantity, the full electric quantity of the battery and the state of charge.
The full charge and state of charge of the battery 102 may be obtained from the set parameters of the battery 102. The formula for obtaining the corrected state of charge is as follows:
SOC z ＝SOC-((K×I×T)/fullcap)
wherein SOC is z Indicating the corrected state of charge, SOC indicating the state of charge of the battery 102, kχi×t indicating the corrected discharged charge, and fullcap indicating the full charge of the battery 102, which is subtracted from the state of charge SOC of the battery 102 to obtain the corrected state of charge SOC z 。
Finally, after obtaining the corrected discharge electric quantity of 1.5I×T, the corrected state of charge SOC can be obtained by combining the full charge electric quantity fullcap of the battery 102 and the state of charge SOC of the battery 102 z 。
Referring to fig. 9, in some embodiments, the state of charge correction method includes steps S801 to S803, and steps S801 to S802 are described in detail with reference to steps S101 to S102. Wherein, after step 802, the method for correcting the state of charge further includes the following steps:
step S803: if the battery voltage is greater than the reference voltage, no correction is made to the state of charge.
After the reference voltage is determined, if the acquired battery voltage is greater than the reference voltage, the current state of charge is not corrected. In one example, the battery voltage obtained by the battery management system unit 101 is 3.6V and greater than the reference voltage is 3.25V, and the current state of charge is not corrected.
It will be appreciated that if the current battery voltage is greater than the reference voltage, this indicates that the current battery voltage is high and that there is a low likelihood of a displayed state of charge not matching the state of charge that can be used in practice, and therefore no correction may be made to the current state of charge.
Referring to fig. 10, in some embodiments, the state of charge correction method includes steps S901 to 903, and steps S901 to S902 are described in detail with reference to steps S101 to S102. Wherein, after step 902, the method for correcting the state of charge further includes the following steps:
step S903: if the battery voltage is less than the reference voltage and the state of charge is less than the preset threshold, the state of charge is not corrected.
In other embodiments, after the reference voltage is determined, if the acquired battery voltage is less than the reference voltage and the state of charge is less than the preset threshold, the state of charge is likewise not modified.
In one example, the battery voltage acquired by the battery management system unit 101 is 3.1V, which is less than the reference voltage is 3.25V, and the current state of charge acquired is 0.5% less than the preset threshold value 1%, and no correction is made to the current state of charge of 0.5%.
It will be appreciated that if the current battery voltage is less than the reference voltage, although it is indicated that the current battery voltage is low, there may be a situation in which the displayed state of charge does not match the state of charge that can be actually used, however, the current state of charge is less than the preset threshold, which indicates that the current state of charge at this time corresponds to the situation in which the battery voltage is low, and the current state of charge may not be corrected.
Referring to fig. 11, for one embodiment, an electronic device 100 includes a memory 31, at least one processor 32, at least one communication bus 33, and a battery 102.
It will be appreciated by those skilled in the art that the configuration of the energy storage device 110 shown in fig. 11 is not limiting of the embodiments of the present application, and that the electronic device 100 may also include additional hardware or software, more or less than that shown, or a different arrangement of components. For example, the electronic device 100 may also include a plurality of interfaces, the first interface for accessing a load to power the load. The second interface is used to access the stand-alone battery 102 package to increase the capacity of the energy storage device 110.
The electronic device 100 is a device provided with a battery 102 including an energy storage device 110, a refrigerator or an air conditioner, or the like as described above. It should be noted that the electronic device 100 is only an example, and other electronic products that may be present in the present application or may be present in the future are also included in the scope of the present application and are incorporated herein by reference.
In some embodiments, the memory 31 has stored therein a computer program which, when executed by the at least one processor 32, performs all or part of the steps in the state of charge correction method as described for the battery 102. The Memory 31 includes Read-Only Memory (ROM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable rewritable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic tape Memory, or any other medium that can be used for a computer readable medium that carries or stores data.
Further, the computer-readable storage medium may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the electronic device 100, and the like.
In some embodiments, at least one processor 32 is a Control Unit (Control Unit) of electronic device 100 that interfaces with various interfaces and lines to various components of the overall electronic device 100, by running or executing programs or modules stored in memory 31, and invoking data stored in memory 31 to perform various functions of electronic device 100 and process data. For example, at least one processor 32, when executing the computer programs stored in memory, implements all or part of the steps of the state of charge correction method in embodiments of the present application; or to perform all or part of the functions of the battery 102 pack heating duration determining apparatus. The at least one processor 32 may be comprised of integrated circuits, such as a single packaged integrated circuit, or may be comprised of multiple integrated circuits packaged with the same or different functionality, including one or more central processing units (Central Processing unit, CPU), microprocessors, digital processing chips, graphics processors, a combination of various control chips, and the like.
In some embodiments, at least one communication bus 33 is provided to enable connected communication between the memory 31 and the at least one processor 32 or the like.
Although not shown, the electronic device 100 may also include a battery 102 for powering the various components, preferably the battery 102 may be logically connected to the at least one processor 32 via a power management device to perform functions such as managing charge, discharge, and power consumption via the power management device. The energy storage device 110 may also include one or more of any components, such as a direct current or alternating current power source, recharging device, power failure detection circuit, power converter or inverter, power status indicator, etc. The electronic device 100 may also include various sensors, bluetooth modules, wi-Fi modules, etc., which are not described in detail herein.
The integrated units implemented in the form of software functional modules described above may be stored in a computer readable storage medium. The software functional modules described above are stored in a storage medium that includes instructions for causing a power storage device 110 (which may be a personal computer or a network device, etc.) or a controller (processor) to perform portions of the methods of various embodiments of the present application.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of modules is merely a logical function division, and other manners of division may be implemented in practice.
The modules illustrated as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional module in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units can be realized in a form of hardware or a form of hardware and a form of software functional modules.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it will be obvious that the term "comprising" does not exclude other elements or that the singular does not exclude a plurality. Several of the elements or devices recited in the specification may be embodied by one and the same item of software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.
Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.
Claims (10)
1. A method of modifying a state of charge, the method comprising:
when a battery is in a discharging state, obtaining the discharging current of the battery;
determining a reference voltage of the battery according to the discharge current and the current threshold value of the battery, wherein the reference voltage is the discharge voltage of the battery when the charge state of the battery is reduced to a preset threshold value;
acquiring the current battery voltage and the current state of charge of the battery;
and if the battery voltage is smaller than the reference voltage and the state of charge is larger than the preset threshold, correcting the state of charge according to the preset threshold.
2. The method of claim 1, wherein determining the reference voltage of the battery based on the discharge current of the battery and the current threshold comprises:
And if the discharge current is smaller than the current threshold value, determining a first preset voltage as a reference voltage.
3. The method of claim 2, wherein determining the reference voltage of the battery based on the discharge current of the battery and the current threshold comprises:
if the discharge current is greater than the current threshold, acquiring the lowest cell voltage of the battery, wherein the lowest cell voltage is the lowest value of the voltages of all cells in the battery;
and determining the reference voltage according to the lowest cell voltage and the discharge current, wherein the reference voltage is larger than the first preset voltage.
4. The method of claim 1, wherein said modifying said state of charge according to said preset threshold comprises:
calculating a difference between the state of charge and the preset threshold;
and correcting the state of charge according to the difference value.
5. The method of claim 4, wherein said modifying said state of charge based on said difference comprises:
acquiring a corresponding correction multiplying power according to the difference value, wherein the correction multiplying power is increased along with the increase of the difference value;
And correcting the state of charge according to the correction multiplying power.
6. The method of claim 5, wherein said modifying said state of charge according to said modification factor comprises:
calculating the discharge electric quantity of the battery according to the discharge current;
correcting the discharge electric quantity according to the correction multiplying power;
and calculating according to the corrected discharge electric quantity, the full electric quantity of the battery and the state of charge to obtain the corrected state of charge.
7. The method according to claim 1, wherein the method further comprises:
if the battery voltage is greater than the reference voltage, not correcting the state of charge; or alternatively
And if the battery voltage is smaller than the reference voltage and the state of charge is smaller than the preset threshold, not correcting the state of charge.
8. A method according to claim 3, wherein said determining said reference voltage from said minimum cell voltage and said discharge current comprises:
determining a voltage correction amplitude according to the discharge current;
and calculating the sum of the lowest cell voltage and the voltage correction value to obtain the reference voltage.
9. An electronic device, comprising:
a battery;
a processor; and
a memory for storing executable instructions of the processor;
wherein execution of the executable instructions by the processor causes the electronic device to perform the state of charge correction method of any one of claims 1 to 8.
10. A storage medium having stored thereon a computer program, which when executed by a processor, implements the state of charge correction method of any one of claims 1 to 8.
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| CN118507888A (en) * | 2024-07-16 | 2024-08-16 | 深圳市德兰明海新能源股份有限公司 | Method and device for displaying electric quantity information correction and energy storage product |
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| CN118507888A (en) * | 2024-07-16 | 2024-08-16 | 深圳市德兰明海新能源股份有限公司 | Method and device for displaying electric quantity information correction and energy storage product |
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