CN116359755A - Method for correcting state of charge, electronic equipment and storage medium - Google Patents

Abstract

The application provides a method for correcting the state of charge, electronic equipment and storage media, which belong to the field of new energy technology. The method for correcting the state of charge includes: obtaining the discharge current of the battery when the battery is in the discharge state; Current and current threshold, determine the reference voltage of the battery, the reference voltage is the discharge voltage of the battery when the state of charge of the battery drops to the preset threshold; obtain the current battery voltage and state of charge of the battery; if the battery voltage is less than the reference voltage, and the charge If the state of charge is greater than the preset threshold, the state of charge is corrected according to the preset threshold. In the embodiment of the present application, after determining that the current battery voltage is lower than the reference voltage and the state of charge is greater than the preset threshold, it can be determined that the current state of charge does not match, and finally the state of charge is corrected according to the preset threshold so that the current state of charge The state matches the actual usable state of charge.

Description

Method for correcting state of charge, electronic equipment and storage medium

technical field

The application belongs to the field of new energy technologies, and in particular relates to a method for correcting the state of charge, electronic equipment and a storage medium.

Background technique

When an electronic device with a battery is being discharged, the current state of charge and the remaining usage time of the battery will be displayed on the electronic device.

However, in related technologies, the state of charge and the remaining usage time of the power displayed on the electronic device are inaccurate, 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 power, resulting in a poor experience.

Contents of the invention

In view of this, the present application provides a method for correcting the state of charge, an electronic device, and a storage medium, which can match the current state of charge on the electronic device with the actually usable state of charge, wherein the current state of charge can be mapped Accurate remaining usage time is obtained, so that users can plan to use electronic devices.

The first aspect of the present application provides a method for correcting the state of charge. The method for correcting the state of charge includes:

Obtain the discharge current of the battery when the battery is in a discharge state;

determining a reference voltage of the battery according to the discharge current and the current threshold of the battery, where the reference voltage is the discharge voltage of the battery when the state of charge of the battery drops to a preset threshold;

Obtain the current battery voltage and state of charge of the battery;

If the battery voltage is less 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.

In this way, when the battery is in the discharge state, the discharge current of the battery is obtained, and the discharge voltage of the battery when the state of charge of the battery drops to a preset threshold can be determined according to the discharge current of the battery and the current threshold, that is, the reference voltage is determined, and then according to the reference The voltage can realize the state of charge correction in advance or not correct the state of charge in advance. After determining the reference voltage of the battery, then obtain the current battery voltage and state of charge of the battery. If it is determined that the current battery voltage is lower than the reference voltage, it means that the current battery voltage is low, and the current state of charge may be different from the actual state of charge. If the state of charge does not match, after determining that the state of charge is greater than the preset threshold, it can be determined that the current state of charge does not match the actual state of charge, and finally the state of charge is corrected according to the preset threshold. In order to match the current state of charge with the actual usable state of charge, the displayed remaining usage time is accurate.

In some embodiments of the first aspect, the determining the reference voltage of the battery according to the discharge current and the current threshold of the battery includes:

If the discharge current is smaller than the current threshold, the first preset voltage is determined as the reference voltage.

In this way, when the discharge current is less than the current threshold, the first preset voltage is determined as the reference voltage, and the current state of charge can be corrected to a practically usable state of charge.

In some embodiments of the first aspect, the determining the reference voltage of the battery according to the discharge current and the current threshold of the battery includes:

If the discharge current is greater than the current threshold, obtain the minimum cell voltage of the battery, the minimum cell voltage is the lowest value of all cell voltages in the battery, according to the minimum cell voltage The voltage and the discharge current determine the reference voltage, wherein the reference voltage is greater than the first preset voltage.

In this way, when the discharge current is greater than the current threshold, the reference voltage is determined according to the minimum cell voltage and discharge current, and the reference voltage can be dynamically changed according to changes in the minimum cell voltage and discharge current, while making the reference voltage greater than the first preset Voltage, compared with related technologies, can correct the state of charge in advance, the correction time is longer, and the current state of charge can be corrected to a state of charge that can be actually used.

In some embodiments of the first aspect, the modifying the state of charge according to the preset threshold includes:

calculating a difference between the state of charge and the preset threshold,

The state of charge is corrected according to the difference.

In this way, the difference is calculated according to the state of charge and the preset threshold value, and the current state of charge is corrected according to the difference, so that within the preset correction time, the current state of charge of different sizes can be corrected into a practical state of charge .

In some embodiments of the first aspect, the modifying the state of charge according to the difference includes:

Acquiring a corresponding correction magnification according to the difference, wherein the correction magnification increases as the difference increases;

The state of charge is corrected according to the correction magnification.

In some embodiments of the first aspect, the correcting the state of charge according to the correction factor includes:

calculating the discharge capacity of the battery according to the discharge current;

Correcting the discharge electric quantity according to the correction factor;

The corrected state of charge is calculated according to the corrected discharge capacity, the fully charged capacity of the battery, and the state of charge.

In 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

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 this way, if the current battery voltage is greater than the reference voltage, it means that the current battery voltage is relatively high, and the possibility of a mismatch between the displayed state of charge and the actual state of charge that can be used is low. Therefore, it is not necessary to correct the current state of charge . If the current battery voltage is lower than the reference voltage, although the current battery voltage is low, the displayed state of charge may not match the actual state of charge, however, the current state of charge is less than the preset threshold, indicating that this The current state of charge at the time corresponds to the situation that the battery voltage is low, and the current state of charge may not be corrected.

In some embodiments of the first aspect, the determining the reference voltage according to the minimum cell voltage and the discharge current includes:

determining a voltage correction amplitude according to the discharge current;

The reference voltage is obtained according to the sum of the minimum cell voltage and the voltage correction value.

In this way, the reference voltage can be continuously changed on the basis of the lowest cell voltage according to the change of the discharge current, so that the reference voltage can be dynamically adjusted.

The second aspect of the present application provides an electronic device, including:

Battery;

processor; and

a memory for storing executable instructions of the processor;

Wherein, the processor executes the executable instruction so that the electronic device executes the method for correcting the state of charge of the battery described above.

In this way, when the battery of the electronic device is in the discharge state, the processor of the electronic device obtains the discharge current of the battery, and can determine the discharge voltage of the battery when the state of charge of the battery drops to a preset threshold according to the discharge current of the battery and the current threshold. That is, the reference voltage is determined, and then the state of charge can be corrected in advance or not corrected in advance according to the reference voltage. After the processor determines the reference voltage of the battery, it then obtains the current battery voltage and state of charge of the battery. If it is determined that the current battery voltage is lower than the reference voltage, it means that the current battery voltage is low, and the current state of charge may be different from the actual state of charge. If the used state of charge does not match, the processor can determine that the current state of charge does not match the actual state of charge after determining that the state of charge is greater than the preset threshold. The state of charge is corrected so that the current state of charge matches the actual usable state of charge so that the displayed remaining usage time is accurate. Through this embodiment, it is possible to accurately display the remaining usage time of the battery to meet the usage requirements of the user.

A third aspect of the present application provides a storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above method for correcting the state of charge of a battery is implemented.

The effect of the third aspect of the present application is similar to that of the second aspect, and will not be repeated here.

Description of drawings

FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

FIG. 2 is an application scene diagram of a method for correcting the state of charge of a battery provided by an embodiment of the present application;

FIG. 3 is an application scene diagram of a method for correcting the state of charge of a battery provided in another embodiment of the present application;

FIG. 4 is a schematic flowchart of a method for correcting the state of charge of a battery provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for correcting the state of charge of a battery provided in another embodiment of the present application;

FIG. 6 is a schematic flowchart of a method for correcting the state of charge of a battery provided in another embodiment of the present application;

FIG. 7 is a schematic flowchart of a method for correcting the state of charge of a battery provided in another embodiment of the present application;

FIG. 8 is a schematic flowchart of a method for correcting the state of charge of a battery provided in yet another embodiment of the present application;

FIG. 9 is a schematic flowchart of a method for correcting the state of charge of a battery provided in another embodiment of the present application;

FIG. 10 is a schematic flowchart of a method for correcting the state of charge of a battery provided in another embodiment of the present application;

FIG. 11 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

A plurality referred to in this application refers to two or more than two. In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or imply order.

In the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

Some embodiments will be described below with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. In addition, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present application, rather than to limit the present application. Appropriate alterations and variations of these fall within the scope of the disclosure of this application.

The following is a brief description of the related technologies:

When electronic devices equipped with batteries, such as energy storage devices, refrigerators, or air conditioners, are being discharged, due to the sharp change in the discharge current, there will be a state of charge (State of Charge, SOC) displayed on the electronic device and a residual state of charge map. A problem where the usage time does not match the actual remaining usage time. For example, the state of charge displayed on the display screen of the electronic device is 5%, and the remaining use time is 2 hours. At this time, the user continues to use the electronic device. After the user uses it for 6 minutes, the electronic device suddenly loses power and shuts down. Continuing to use the electronic device affects user experience.

In order to prevent the battery cells in the electronic equipment from continuing to discharge after being lower than the undervoltage and affecting the overall life of the battery, the lowest value of the voltages of all the cells in the battery is generally used as the battery voltage of the entire battery. At the same time, 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 discharged, that is, less than the initial discharge point voltage, the charge state of the electronic device is corrected at a preset speed to default value. That is to say, the initial discharge point voltage is used as the judgment value of whether to correct the current positive state of charge, and the correction speed is preset, and it is impossible to directly jump from one state of charge to another state of charge. For example, the voltage at the initial emptying point is 3.2V, and the preset value of the state of charge is 1%. The speed is fixed to 1%, it cannot jump directly from 7% to 1%.

When the discharge current of the battery is too large, the discharge speed will be accelerated, which will lead to a shorter time for the battery voltage to reach the undervoltage point. The voltage value of the undervoltage point is similar, and the correction of the state of charge cannot jump. Therefore, the current battery voltage is close to the undervoltage point voltage, but the state of charge has not been corrected to the preset value, resulting in a large difference between the displayed state of charge and the actual usable state of charge, that is, the displayed remaining usage time It does not match the actual remaining usage time, which affects the user's experience of using the electronic device. For example, if the undervoltage point is 3.1V, the battery suddenly supplies power to a high-power load, the discharge current increases, and the time for the battery voltage to reach the undervoltage becomes shorter. When the battery voltage reaches the undervoltage point of 3.1V, the corrected state of charge is displayed as 5%, which is inconsistent with the actual usable state of charge of 1%, and there is no time to correct the state of charge to 0%. .

In view of this, the present application provides a method for correcting the state of charge, an electronic device, and a storage medium, which can match the state of charge displayed on the electronic device with the actually usable state of charge, wherein the displayed state of charge can be mapped Accurate remaining usage time is obtained, so that the user can plan and use the electronic device with accurate remaining usage time.

Please refer 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 used to provide power for a load. The battery management The system unit 101 is used to control the battery 102 to provide power to the load, wherein the state of the battery 102 supplying power to the load is the discharge state, when the battery 102 supplies power to the load, the output current of the battery 102 is the discharge current, and the voltage generated by the discharge current is the discharge voltage . The electronic device 100 includes an energy storage device, or is an air conditioner, a refrigerator, a computer and other devices with a battery 102 . The load includes electric devices and power devices of the electronic device 100 .

FIG. 2 is an application scene diagram of a method for correcting a state of charge, and the method for correcting a state of charge of the present application is applied to an energy storage device. The energy storage device 110 is electrically connected to the electric device 200, and the electric device 200 includes an induction cooker, an electric light, a sweeper or other devices that consume electric energy for work. After the energy storage device 110 is electrically connected to the electric device 200, the battery management system unit 101 of the energy storage device 110 controls the battery 102 to supply power to the electric device 200. The electric device 200 inputs a discharge current to generate a discharge voltage. The battery management system unit 101 of the energy storage device 110 obtains the discharge current of the battery 102, and then, according to the discharge current of the battery 102 and the current threshold, determines the discharge voltage of the battery 102 when the state of charge of the battery 102 drops to a preset threshold, and also That is, the reference voltage of the battery 102 is determined. Next, obtain the current battery voltage and state of charge of the battery 102. If it is determined that the current battery voltage is lower than the reference voltage and the state of charge is greater than a preset threshold, the state of charge is corrected according to the preset threshold, and the energy storage device The displayed state of charge at 110 is the corrected state of charge.

FIG. 3 is another application scenario diagram of a correction method for the state of charge. The electronic device 100 further includes a power device 120, the battery 102 is electrically connected to the power device 120, and the power device 120 of the electronic device 100 includes a central processing unit (central processing unit, CPU). ), memory and display screen, etc., the battery 102 is used to supply power to the power device 120. The battery management system unit 101 of the electronic device 100 can execute the steps of the battery management system unit 101 of the energy storage device 110 shown in FIG. 2 to correct the current state of charge of the battery and obtain the displayed state of charge. In this embodiment, the electronic device 100 may be a portable air conditioner with a battery, a portable refrigerator with a battery, or the like.

Please refer to FIG. 4 . FIG. 4 is a schematic flowchart of a method for modifying the state of charge of an embodiment of the present application. The method for correcting the state of charge of the present application can be applied to the electronic device 100 , and specifically can be applied to the battery management system of the electronic device 100 Unit 101. In some embodiments, the method for correcting the state of charge can also be applied to a controller with related processing functions in the electronic device. Or the method for correcting the state of charge can be applied in an independent functional module, which has related processing capabilities, and can be connected to an electronic device with a battery in a wired or wireless manner. Or obtain relevant data of the electronic device with the battery in a wireless manner, so as to execute the method for correcting the state of charge provided in the embodiment of the present application.

Referring to Fig. 4, the correction method of the state of charge comprises the following steps:

Step S101: Acquire the discharge current of the battery when the battery is in a discharge state.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , when the battery 102 is in a discharged state means that the battery 102 supplies power to the load. The discharge current refers to the current output to the load when the battery 102 supplies power to the load.

Step S102: Determine the reference voltage of the battery according to the discharge current of the battery and the current threshold.

The current threshold can be used to judge whether the discharge current is too large. In this application, a current threshold can be set according to the relevant parameters of the electronic device 100 . Specifically, the discharge current will 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, when the output voltage is constant, if the demand power of the load increases, the discharge current of the battery 102 increases accordingly; if the demand power of the load decreases, the discharge current of the battery 102 The current decreases accordingly.

At the same time, excessive discharge current will affect the time for the battery voltage of the battery to reach the initial discharge point voltage. Specifically, when the discharge current is greater than the current threshold, it means that the current at this time will shorten the time for the battery voltage to reach the initial discharge point voltage. When the discharge current is less than the current threshold, it means that the current at this time will not affect the battery voltage. Time to initial vent point voltage.

The reference voltage refers to the corresponding discharge voltage of the battery 102 when the state of charge (SOC) of the battery 102 drops to a preset threshold, and the reference voltage is greater than or equal to the initial discharge point voltage.

Understandably, the battery management system unit 101 can judge the current discharge current of the battery 102 according to the discharge current and the current threshold of the battery 102, determine the corresponding reference voltage according to the current discharge current, and correct the current discharge current according to the corresponding reference voltage. The state of charge of the energy storage device 110 may or may not modify the state of charge of the energy storage device 110 .

The preset threshold of the state of charge refers to the critical value of the state of charge of the battery 102 that the displayed state of charge may not match the actual usable state of charge. The preset threshold of the state of charge can be 1%, 2%, % or 2.4%, etc.

It can be understood that, according to the embodiment of the present application, a preset threshold value and a reference voltage of the state of charge can be set 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 discharge point voltage, and the preset threshold value It can be used to judge whether the current state of charge is the actual usable state of charge under the condition that the battery voltage is close to the initial discharge point voltage.

Step S103: Obtain the current battery voltage and state of charge of the battery.

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: If the battery voltage is lower than the reference voltage and the state of charge is greater than a preset threshold, correct the state of charge according to the preset threshold.

Understandably, since the reference voltage is slightly greater than or equal to the initial emptying point voltage, if the current battery voltage is lower than the reference voltage, it means that the current battery voltage is low, and the displayed state of charge may not match the actual usable state of charge . Therefore, when it is determined that the current battery voltage is lower than the reference voltage, further judge the current state of charge and the preset threshold, and if the current state of charge is greater than the preset threshold, it means that the state of charge currently displayed by the energy storage device 110 requires Make corrections, and correct the currently displayed state of charge according to the preset threshold.

In this way, the battery management system unit 101 of the electronic device 100 obtains the discharge current of the battery 102 when the battery 102 is in the discharge state, and can determine a reference voltage according to the discharge current of the battery 102 and the current threshold, and the reference voltage can be combined with the discharge of the battery 102 Current, determine whether to correct the state of charge in advance or not to correct the state of charge in advance. After determining the reference voltage of the battery 102 , the battery management system unit 101 acquires the current battery voltage and state of charge of the battery 102 . In some embodiments, if the current battery voltage is lower than the reference voltage, it means that the current battery voltage is low, and there may be a situation where the current state of charge does not match the actual state of charge, and the current state of charge is greater than the preset When the threshold is reached, it can be determined that the current state of charge does not match the actual state of charge used. Therefore, when the battery management system unit 101 determines that the current battery voltage is lower than the reference voltage and the state of charge is greater than the preset threshold, it corrects the state of charge according to the preset threshold, so that the current state of charge is different from the actual usable The state of charge is matched, that is, the remaining usage time displayed by the energy storage device 110 is matched with the actual remaining usage time.

In some embodiments, please refer to FIG. 5. The method for correcting the state of charge includes steps S201 to S204. For specific details of step S201, step S203 and step S204, please refer to the relevant steps of step S101, step S103 and step S104 in the above-mentioned embodiments. expression. Among them, in this embodiment:

Step S202 includes: if the discharge current is less than the current threshold, determining the first preset voltage as the reference voltage.

The first preset voltage refers to the initial emptying point voltage mentioned in the above embodiments.

It can be understood that when the discharge current is less than the current threshold, the time for the current battery voltage to reach the initial emptying point voltage is normal, and the initial emptying point voltage can be directly used as the reference voltage. Since the reference voltage is equal to the initial emptying point voltage, there is no need to correct the state of charge in advance, that is, the current state of charge is the state of charge that can be actually used.

In some embodiments, please refer to FIG. 6 , the method for correcting the state of charge includes steps S301 to S304 , and the specific details of step S301 , step S303 and step S304 refer to step S101 , step S103 and step S104 respectively. Wherein, in this embodiment, step S302 includes:

If the discharge current is greater than the current threshold, the minimum cell voltage of the battery is obtained, the minimum cell voltage is the lowest value of all cell voltages in the battery, and the reference voltage is determined according to the minimum cell voltage and discharge current, where the reference voltage greater than the first preset voltage.

Specifically, the battery 102 includes multiple cells, and each cell has a corresponding cell voltage, wherein the cell voltage with the lowest value is the lowest cell voltage. For example, the battery 102 has three batteries, namely the first battery, the second battery and the third battery, the voltage of the first battery is 3.2V, the voltage of the second battery is 3.4V, the voltage of the third battery is The voltage of the battery is 3.25V, and the lowest value of the voltage of the three batteries is 3.2V. Therefore, the lowest battery voltage refers to the voltage of the first battery 3.2V.

Understandably, when the discharge current is greater than the current threshold, the greater the discharge current of the battery, the shorter the time for the current battery voltage to reach the initial emptying point voltage. Because the correction of the state of charge is not allowed to 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 the actual usable value. state of charge match. When the discharge current is greater than the current threshold, first determine a reference voltage greater than the initial discharge point voltage. The set reference voltage is greater than the initial emptying point voltage. Therefore, compared with related technologies, the state of charge can be corrected in advance, so that the correction time of the state of charge can be longer, and the current state of charge can be corrected in time to a practical level. State of charge, and there will be no state of charge jump.

It can be understood that the reference voltage is determined according to the minimum cell voltage and discharge current, and the reference voltage can be dynamically changed according to changes in the minimum cell voltage and discharge current, thereby determining a dynamic reference voltage greater than the initial discharge point voltage.

In some embodiments, referring to FIG. 7 , determining the reference voltage according to the lowest cell voltage and the discharge current includes the following steps:

Step S401: Determine the voltage correction amplitude according to the discharge current.

Different discharge currents correspond to different voltage correction amplitudes. Therefore, after the discharge current is obtained, the corresponding voltage correction amplitude can be determined according to the discharge current.

In some embodiments, determining the voltage correction amplitude according to the discharge current may include the following steps:

S4011: Obtain a preset correction coefficient.

S4012: Determine 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, where I represents the discharge current, k is the preset correction coefficient, and the correction coefficient can be set in advance. The mathematical expression indicates that the voltage correction amplitude is obtained by multiplying the preset correction coefficient k and the discharge current I. In an example, when the discharge current I is 0.5, a voltage correction amplitude of 0.5k can be obtained; when the discharge current I is 0.7, a voltage correction amplitude of 0.7k can be obtained.

Step S402: Calculate the sum of the minimum cell voltage and the voltage correction value to obtain a reference voltage.

In an example, according to the sum of the minimum cell voltage and the voltage correction value, the formula for obtaining the reference voltage is as follows:

V=V _o +I×k

Wherein, V represents the reference voltage, V ₀ represents the minimum cell voltage, V ₀ can be obtained through the parameters of the battery 102, I×k represents the voltage correction value, and I is the discharge current. In some embodiments, K may be 0.002, that is, when the discharge current is 1A, the reference voltage V is increased by 2mV on the lowest cell voltage V ₀ .

It can be understood that when the battery 102 is in a discharging state, the reference voltage will increase continuously on the basis of the lowest cell voltage as the discharge current increases, so as to be dynamically adjusted.

In some embodiments, the reference voltage is less than the preset upper limit value, the preset upper limit value is related to the cell voltage of the battery cell, and the voltage of a single cell is 3.3V, then, the preset upper limit value can be set to 3.2V.

It is understandable that the reference voltage is lower than the preset upper limit, which can avoid setting the reference voltage too high. After correcting the state of charge in advance, the correction time is too long, which will cause the corrected state of charge to stop at a certain value for a long time . For example, the corrected state of charge stays at 1% for a long time. At the same time, the preset upper limit value is slightly greater than the initial emptying point voltage, which can be corrected as much as possible when the battery 102 is emptying.

Referring to FIG. 8 , in some embodiments, correcting the state of charge according to a preset threshold includes the following steps:

Step S501: Calculate the difference between the state of charge and a preset threshold.

When the battery 102 is in the discharge state, there will be a constantly changing state of charge, so the difference between each changed state of charge and the preset threshold can be calculated, so as to obtain the battery 102 during the entire discharge process, each The difference between the state of charge and the preset threshold, and then classify the difference according to the size of the difference.

Calculate the difference A according to the following formula:

A＝B _SOC -C

Wherein, A represents the difference, B _SOC represents the state of charge of the battery 102 , and C represents the preset threshold, and the formula indicates that the difference A is the state of charge B _SOC of the battery 102 minus the preset threshold C.

In one example, the state of charge B _SOC of the battery 102 is 6%, the preset threshold C is 1%, and the difference A is 6%−1%=5%. Based on this calculation, during the entire discharge process of the battery 102, the difference is classified according to the size of the difference, the difference is greater than 20% as a class, the difference is less than or equal to 20% and greater than 10% is a class, the difference is less than or equal to 10% and greater than 5% is one category and the difference is less than or equal to 5% and greater than 1% is one category. The difference classification can be seen in Table 1.

Step S502: Correcting the state of charge according to the difference.

It can be understood that by correcting the corresponding state of charge according to the differences of different magnitudes, the states of charge of different magnitudes can be corrected into practically usable states of charge within the same correction time.

In some embodiments, correcting the current state of charge according to the difference includes the following steps:

S5021: Obtain a corresponding correction magnification according to the difference, where the correction magnification increases as the difference increases.

After the difference is calculated, the corresponding correction factor for each category can be obtained according to the category of the difference, so that the current state of charge of different sizes can obtain a corresponding correction range. The correction factor corresponding to each category can be obtained through related formulas or experiments. In one example, the relationship between the difference category and the correction factor can be seen in Table 2, that is, the correction factor corresponding to the difference value of the first category is 4 times, the correction factor corresponding to the difference value of the second category is 3 times, and the correction factor corresponding to the difference value of the third category is 3 times. The correction magnification corresponding to the difference of 2 is 2 times, and the correction magnification corresponding to the difference of the fourth category is 1.5 times.

In one example, according to the corresponding relationship in Table 2, it can be known that when the calculated difference is 5%, the correction factor is 1.5 times.

S5022: Correct the current state of charge according to the correction magnification.

Continuing from the previous example, the current state of charge of 6% is corrected according to the correction factor of 1.5 times, so as to correct it into a state of charge that can be used in practice.

In some embodiments, correcting the current state of charge according to the correction factor further includes the following steps:

S50221: Calculate the discharge power of the battery according to the discharge current.

The discharge power refers to the power accumulated by the discharge current during the discharge process. It can be understood that during the discharge process from the start discharge state to the current discharge state, the battery 102 has been inputting discharge current to the load, and the discharge current and discharge time of the battery 102 during the entire discharge process can be accumulated to obtain the discharge power of the battery 102 .

S50222: Correct the discharge electric quantity according to the correction ratio.

The corrected discharge capacity can be expressed by a mathematical expression K×I×T, where K represents the correction rate, I represents the discharge current, and T represents the discharge time. The mathematical expression expresses that the correction rate K, the discharge current I and the discharge time T are multiplied to obtain the corrected discharge electric quantity. Continuing from the previous example, if the correction factor K is 1.5 times, then the corrected discharge capacity is 1.5I×T. It can be understood that the discharge power corrected according to the correction factor is closer to the power actually consumed by the battery 102 during the entire discharge process.

S50223: Calculate and obtain the corrected state of charge according to the corrected discharged power, the fully charged power of the battery, and the state of charge.

The full charge capacity and state of charge of the battery 102 can be obtained from the preset 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 _z represents the state of charge after correction, SOC represents the state of charge of the battery 102, K × I × T represents the discharge capacity after correction, fullcap represents the full charge capacity of the battery 102, and this formula represents the discharge capacity after correction K×I×T is divided by fullcap, and then subtracted from the state of charge SOC of the battery 102 to obtain the corrected state of charge SOC _z .

Continuing from the previous example, finally, after obtaining the corrected discharge capacity of 1.5I×T, the corrected SOC _z can be obtained by combining the fully charged capacity fullcap of the battery 102 with the SOC of the battery 102 .

Please refer to FIG. 9 . In some embodiments, the method for correcting the state of charge includes steps S801 to S803 . For details of steps S801 to S802 , refer 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, then the state of charge is not corrected.

After the reference voltage is determined, if the obtained 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, which is 3.25V higher than the reference voltage, and the current state of charge is not corrected.

It can be understood that if the current battery voltage is greater than the reference voltage, it means that the current battery voltage is relatively high, and the possibility that the displayed state of charge does not match the actual state of charge is low. Therefore, the current state of charge may not be corrected. Make corrections.

Referring to FIG. 10 , in some embodiments, the method for correcting the state of charge includes steps S901 to 903 , and for details of steps S901 to S902 , refer 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 a preset threshold, then 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 a preset threshold, the state of charge is also not corrected.

In one example, the battery voltage obtained by the battery management system unit 101 is 3.1V, which is lower than the reference voltage of 3.25V, and the obtained current state of charge of 0.5% is less than the preset threshold of 1%, which is not the same as the current state of charge of 0.5%. Make corrections.

Understandably, if the current battery voltage is lower than the reference voltage, although the current battery voltage is low, there may be a situation where the displayed state of charge does not match the actual state of charge. However, the current state of charge is less than the preset The threshold value indicates that the current state of charge at this time is in line with the low battery voltage, and the current state of charge may not be corrected.

As an embodiment, referring to FIG. 11 , an electronic device 100 includes a memory 31 , at least one processor 32 , at least one communication bus 33 and a battery 102 .

Those skilled in the art should understand that the structure of the energy storage device 110 shown in FIG. layout of the components. For example, the electronic device 100 may further include multiple interfaces, and the first interface is used to connect to a load to supply power to the load. The second interface is used to connect the independent battery pack 102 to increase the capacity of the energy storage device 110 .

The electronic device 100 is a device provided with a battery 102 including the aforementioned energy storage device 110 , a refrigerator, or an air conditioner. It should be noted that the electronic device 100 is only an example, and other existing or future electronic products that can be adapted to this application should also be included in the scope of protection of this application and included here by reference.

In some embodiments, a computer program is stored in the memory 31 , and when the computer program is executed by at least one processor 32 , all or part of the steps in the method for correcting the state of charge as described above are implemented for the battery 102 . Memory 31 includes read-only memory (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 Programmable Read-Only Memory (One-time Programmable Read-Only Memory, OTPROM), Electrically-Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory, CD-ROM) or other optical disk storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

Further, the computer-readable storage medium may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function, etc.; created data, etc.

In some embodiments, at least one processor 32 is the control core (Control Unit) of the electronic device 100, using various interfaces and lines to connect various components of the entire electronic device 100, by running or executing programs stored in the memory 31 or module, and call data stored in the memory 31 to execute various functions of the electronic device 100 and process data. For example, when at least one processor 32 executes the computer program stored in the memory, it realizes all or part of the steps of the method for correcting the state of charge in the embodiment of the present application; or realizes all or part of the functions of the device for determining the heating duration of the battery pack 102 . At least one processor 32 may be composed of integrated circuits, for example, may be composed of a single packaged integrated circuit, or may be composed of multiple integrated circuits with the same function or different function packages, including one or more central processing units (Central Processing Units). Processing unit, CPU), microprocessor, digital processing chip, graphics processor and a combination of various control chips, etc.

In some embodiments, at least one communication bus 33 is configured to implement communication between the memory 31 and at least one processor 32 .

Although not shown, the electronic device 100 may also include a battery 102 for supplying power to various components. Preferably, the battery 102 may be logically connected to at least one processor 32 through a power management device, so as to manage charging, discharging, and functions such as power management. The energy storage device 110 may also include one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components. The electronic device 100 may also include various sensors, a Bluetooth module, a Wi-Fi module, etc., which will not be repeated here.

The above-mentioned integrated units implemented in the form of software function modules can be stored in a computer-readable storage medium. The above-mentioned software functional modules are stored in a storage medium, and include several instructions for enabling an energy storage device 110 (which may be a personal computer or network device, etc.) or a processor to execute part of the method of each embodiment of the present application.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules is only a logical function division, and there may be other division methods in actual implementation.

A module described as a separate component may or may not be physically separated, and a component shown as a module may or may not be a physical unit, and may be located in one place or distributed over multiple network units. Part or all of the modules can 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 into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software function modules.

It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, but that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and not restrictive in all points of view, and the scope of the application is defined by the appended claims rather than the foregoing description, and it is intended that the scope of the present application be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in this application. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is clear that the word "comprising" does not exclude other elements or the singular does not exclude the plural. A plurality of units or devices stated in the specification may also be realized by one unit or device through software or hardware. The words first, second, etc. are used to denote names and do not imply any particular order.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application without limitation. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be Make modifications or equivalent replacements without departing from the spirit and scope of the technical solutions 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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