CN117347894A

CN117347894A - Electronic equipment and method for determining health degree of battery of electronic equipment

Info

Publication number: CN117347894A
Application number: CN202210742015.XA
Authority: CN
Inventors: 杨瑞福
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2024-01-05

Abstract

The application discloses electronic equipment and a method for determining the health degree of a battery of the electronic equipment, and belongs to the technical field of electronics. The electronic device may determine the health of the built-in battery according to a current internal resistance change rate of the current internal resistance of the built-in battery with respect to an initial internal resistance of the built-in battery and a maximum internal resistance change rate corresponding to a current temperature when a ratio of a remaining capacity of the built-in battery to a rated capacity of the built-in battery reaches a target ratio. In the process of determining the health degree of the built-in battery, the maximum internal resistance change rate of the built-in battery at the current temperature is considered, and is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery, so that the accuracy of determining the health degree of the built-in battery is effectively improved.

Description

Electronic equipment and method for determining health degree of battery of electronic equipment

Technical Field

The disclosure relates to the field of electronic technology, and in particular, to an electronic device and a method for determining the health of a battery thereof.

Background

The electronic equipment is provided with a battery, the longer the service time of the battery is, the lower the health degree of the battery is, the more serious the corresponding aging degree is, and the health degree is used for representing the health state of the battery. In order to ensure safe and stable operation of the electronic device, it is currently required to periodically evaluate the health of the battery, so that the user can replace the battery in time when the health of the battery is low.

Disclosure of Invention

The embodiment of the disclosure provides an electronic device and a method for determining the health degree of a battery of the electronic device, which can solve the problem that the accuracy of determining the health degree of the battery of the electronic device is low in the related art. The technical scheme is as follows:

in one aspect, a method for determining a health degree of a battery is provided, and the method is applied to an electronic device, wherein the electronic device comprises a built-in battery; the method comprises the following steps:

if the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio, respectively acquiring the current internal resistance and the current temperature of the built-in battery;

determining the maximum internal resistance change rate corresponding to the current temperature;

determining the health of the built-in battery according to the current internal resistance change rate of the current internal resistance relative to the initial internal resistance of the built-in battery and the maximum internal resistance change rate;

the initial internal resistance of the built-in battery is the internal resistance of the built-in battery when the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio for the first time, the maximum internal resistance change rate is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery, and the rated capacity of the built-in battery is the same as the rated capacity of the built-in battery.

In another aspect, there is provided an electronic device including:

the first acquisition module is used for respectively acquiring the current internal resistance and the current temperature of the built-in battery if the ratio of the residual capacity of the built-in battery of the electronic equipment to the rated capacity of the built-in battery reaches a target ratio;

the second acquisition module is used for acquiring the maximum internal resistance change rate corresponding to the current temperature;

a determining module, configured to determine a health degree of the built-in battery according to a current internal resistance change rate of the current internal resistance relative to an initial internal resistance of the built-in battery, and the maximum internal resistance change rate;

In yet another aspect, an electronic device is provided, the electronic device including: a built-in battery, a processor and a memory, the memory storing a computer program that is loaded and executed by the processor to implement the method of determining the health of a battery as described in the above aspects.

In yet another aspect, a computer readable storage medium is provided, the computer readable storage medium storing a computer program loaded and executed by a processor to implement the method of determining the health of a battery as described in the above aspects.

In yet another aspect, a computer program product or computer program is provided, the computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions so that the electronic device performs the method of determining the health of the battery described in the above aspect.

The technical scheme provided by the embodiment of the disclosure has the beneficial effects that at least:

the embodiment of the disclosure provides an electronic device and a method for determining the health degree of a battery thereof, wherein the electronic device can determine the health degree of the built-in battery according to the current internal resistance change rate of the current internal resistance of the built-in battery relative to the initial internal resistance of the built-in battery and the maximum internal resistance change rate corresponding to the current temperature when the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio. In the process of determining the health degree of the built-in battery, the maximum internal resistance change rate of the built-in battery at the current temperature is considered, and is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery, so that the accuracy of determining the health degree of the built-in battery is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a flowchart of a method for determining the health of a battery according to an embodiment of the present disclosure;

FIG. 2 is a flow chart of another method of determining the health of a battery provided by an embodiment of the present disclosure;

FIG. 3 is a block diagram of an electronic device provided in an embodiment of the present disclosure;

FIG. 4 is a block diagram of another electronic device provided by an embodiment of the present disclosure;

fig. 5 is a block diagram of still another electronic device provided by an embodiment of the present disclosure.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

State of health (SOH) values of batteries can be used to characterize the health of a battery. In the related art, the electronic device may determine the current capacity of the battery, determine the ratio of the current capacity to the rated capacity of the battery as the health degree of the battery, and display the health degree of the battery, so that the user can timely learn the current health degree of the battery. Wherein, the lower the health of the battery, the more serious the aging degree of the battery.

The current capacity of the battery refers to a capacity of the battery discharged from a full charge state at a certain charge/discharge rate until the voltage of the battery is 3 volts (voltage). Optionally, the electronic device may obtain a discharge current and a discharge duration of the battery during the discharging process, and may determine the current capacity of the battery based on the discharge current and the discharge duration.

However, the discharge current of the battery obtained by the electronic device has a certain error relative to the actual discharge current of the battery, and in practical application, the voltage of the battery after discharge can be only reduced to 3.4V at minimum, and since the 3.4V is greater than 3V, all the capacity of the battery after the discharge is completed is not completely reduced, thereby resulting in lower accuracy of determining the current capacity.

Fig. 1 is a flowchart of a method for determining the health of a battery according to an embodiment of the present disclosure, where the method may be applied to an electronic device, and the electronic device may include a built-in battery, and the built-in battery may be a lithium ion battery. As shown in fig. 1, the method includes:

step 101, detecting whether the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio.

In the embodiment of the disclosure, the electronic device may periodically detect whether the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio. If the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio, the electronic device may perform step 102. If the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery does not reach the target ratio, the electronic device may continue to execute step 101.

The ratio of the remaining capacity of the internal battery to the rated capacity of the internal battery is referred to as a state of charge (SOC) value of the internal battery. When the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio, the voltage of the built-in battery is not easily affected by the charging current (or discharging current), and at the moment, the voltage of the built-in battery is stable. The current internal resistance accuracy of the built-in battery determined based on the voltage is high. Alternatively, the target ratio may be 50%.

Step 102, respectively obtaining the current internal resistance and the current temperature of the built-in battery.

After the electronic equipment detects that the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio, the current internal resistance and the current temperature of the built-in battery can be respectively obtained. The current internal resistance of the built-in battery refers to the direct current internal resistance (direct current internal resistance, DCR) of the built-in battery at the current moment.

After the electronic device detects that the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio, the built-in battery can be controlled to discharge for 10 seconds(s) under the intensity of 0.1C, C refers to the multiplying power of the charge and discharge capacity of the built-in battery, the voltage of the built-in battery after discharge is recorded as v1, then the built-in battery is controlled to discharge for 200 milliseconds (ms) under the intensity of 1C, the voltage of the built-in battery after discharge is recorded as v2, and then the electronic device can determine the current internal resistance r2 according to the voltage v2 and the voltage v1 of the built-in battery.

Wherein, the current internal resistance r2 of the built-in battery can satisfy:

step 103, determining the maximum internal resistance change rate corresponding to the current temperature.

After acquiring the current internal resistance and the current temperature of the built-in battery, the electronic device may determine a maximum internal resistance change rate of the built-in battery corresponding to the current temperature.

The maximum internal resistance change rate is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery. The maximum internal resistance is the internal resistance when the built-in battery is scrapped at the current temperature. That is, the maximum internal resistance change rate is used to indicate the maximum degree of aging of the built-in battery. The initial internal resistance of the built-in battery is the internal resistance of the built-in battery when the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio for the first time.

Step 104, determining the health of the built-in battery according to the current internal resistance change rate of the current internal resistance relative to the initial internal resistance of the built-in battery and the maximum internal resistance change rate.

After determining the maximum internal resistance change rate corresponding to the current temperature, the electronic device may further obtain an initial internal resistance r1 of the built-in battery, and may determine a current internal resistance change rate of the current internal resistance relative to the initial internal resistance according to the current internal resistance and the initial internal resistance, so that the electronic device may determine the health of the built-in battery according to the current internal resistance change rate and the maximum internal resistance change rate.

Wherein the current internal resistance change rate is used for indicating the current aging degree of the built-in battery.

In summary, the embodiment of the disclosure provides a method for determining the health of a battery, where when a ratio of a remaining capacity of the internal battery to a rated capacity of the internal battery reaches a target ratio, the electronic device may determine the health of the internal battery according to a current internal resistance change rate of a current internal resistance of the internal battery relative to an initial internal resistance of the internal battery and a maximum internal resistance change rate corresponding to a current temperature. In the process of determining the health degree of the built-in battery, the maximum internal resistance change rate of the built-in battery at the current temperature is considered, and is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery, so that the accuracy of determining the health degree of the built-in battery is effectively improved.

Fig. 2 is a flowchart of another method for determining the health of a battery according to an embodiment of the present disclosure, where the method may be applied to an electronic device, and the electronic device may include a built-in battery, which may be a low-voltage lithium ion battery. Alternatively, the electronic device may be a mobile terminal or an automobile.

As shown in fig. 2, the method may include:

step 201, it is detected whether the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio.

In the embodiment of the disclosure, the electronic device may periodically detect whether the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio. If the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio, step 202 may be performed. If the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery does not reach the target ratio, step 201 may be continued.

The target ratio may be a fixed value stored in the electronic device in advance. The ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery is referred to as the SOC value of the built-in battery, and the rated capacity is referred to as the battery capacity specified by the national standard. When the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio, the voltage of the built-in battery is not easily affected by the charging current (or discharging current), and at the moment, the voltage of the built-in battery is stable. The current internal resistance accuracy of the built-in battery determined based on the voltage is high. Alternatively, the target ratio may be 50%.

It is understood that the electronic device may detect whether the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio during the charging of the built-in battery. It is also possible to detect whether or not the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio in the course of discharging the built-in battery. The embodiments of the present disclosure are not limited in this regard.

Step 202, respectively obtaining the current internal resistance and the current temperature of the built-in battery.

After the electronic equipment detects that the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio, the current internal resistance and the current temperature of the built-in battery can be respectively obtained. The current internal resistance of the built-in battery refers to the direct current internal resistance of the built-in battery at the current moment.

Optionally, a temperature sensor is disposed in the built-in battery, and the temperature sensor is used for detecting the temperature of the built-in battery. After the electronic equipment detects that the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio, the current temperature of the built-in battery detected by the temperature sensor can be obtained.

After the electronic equipment detects that the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio, the built-in battery can be controlled to discharge for 10s under the intensity of 0.1C, C refers to the multiplying power of the charge and discharge capacity of the built-in battery, the voltage of the built-in battery after discharge is recorded as v1, then the built-in battery is controlled to discharge for 200ms under the intensity of 1C, the voltage of the built-in battery after discharge is recorded as v2, and then the electronic equipment can determine the current internal resistance r2 according to the voltage v2 and the voltage v1 of the built-in battery.

in the embodiment of the disclosure, the electronic device may acquire the current internal resistance and the current temperature of the internal battery, respectively, if it is detected whether the ratio of the remaining capacity of the internal battery to the rated capacity of the internal battery reaches the target ratio in the process of charging the internal battery. Or the electronic device may acquire the current internal resistance and the current temperature of the internal battery, respectively, if it is detected whether the ratio of the remaining capacity of the internal battery to the rated capacity of the internal battery reaches the target ratio. In the embodiment of the disclosure, in the process that the electronic device can discharge the built-in battery, if the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery is detected to reach the target ratio, the current internal resistance and the current temperature of the built-in battery are respectively obtained for illustration.

In the embodiment of the disclosure, after the electronic device is activated, the electronic device may acquire the current internal resistance and the current temperature of the built-in battery respectively, if it is detected that the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio in the discharging process of the built-in battery every detection period. That is, the electronic device may determine the health of the built-in battery once every detection period.

The detection period may include a plurality of charging periods and a plurality of discharging periods of the built-in battery, that is, the electronic device determines the health of the built-in battery once every a plurality of charging periods and a plurality of discharging periods. The charging period refers to the time period during which the built-in battery completes one charge, and the discharging period refers to the time period during which the built-in battery completes one discharge.

Step 203, obtaining the maximum internal resistance change rate corresponding to the current temperature.

After the electronic device obtains the current internal resistance and the current temperature of the built-in battery, the electronic device can obtain the maximum internal resistance change rate corresponding to the current temperature.

The maximum internal resistance change rate is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery.

The maximum internal resistance of the built-in battery at the current temperature is the internal resistance when the built-in battery is scrapped at the current temperature. The initial internal resistance of the built-in battery is the internal resistance of the built-in battery when the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio for the first time. That is, the maximum internal resistance change rate is used to indicate the maximum degree of aging of the internal battery at the current temperature.

In the embodiment of the disclosure, a plurality of temperatures and internal resistance change rates corresponding to the plurality of temperatures are recorded in a corresponding relation stored in the electronic device. The electronic device may determine a maximum internal resistance change rate corresponding to the current temperature according to the correspondence relationship.

Wherein, the internal resistance change rate Ht corresponding to the ith temperature in the corresponding relation _i The method meets the following conditions:

the H is _i To obtain the internal resistance, he, of the first test battery when the ratio of the residual capacity of the first test battery to the rated capacity of the first test battery reaches a target ratio for the first time at the ith temperature _i In order to maximize the internal resistance of the first test battery at the ith temperature, the rated capacity of the first test battery is equal to the rated capacity of the built-in battery, i is a positive integer, and i is less than or equal to the total number of the plurality of temperatures.

In an embodiment of the present disclosure, the first test battery is a battery used to test related data before shipment. Since the rated capacity of the first test battery is the same as the rated capacity of the built-in battery, the correspondence relationship can be determined using a plurality of first test batteries.

In an embodiment of the present disclosure, the He _i The internal resistance of the ith first test battery in the plurality of first test batteries when the first test battery is scrapped after the ith first test battery is cycled for a plurality of times at the current temperature. Wherein, the first test battery is subjected to one cycle, which means that the first test battery completes one full charge and discharge. The full charge refers to continuously charging the first test battery with the first charge-discharge rate until the voltage of the first test battery is the first voltage, and then charging the first test battery with the first voltage until the charge-discharge rate of the first test battery is the second charge-discharge rate. The full discharge means that the first test battery is discharged at the third charge-discharge multiplying power under the full charge state until the voltage of the first test battery is the second voltage.

For example, the first charge-discharge rate may be 0.5C, the second charge-discharge rate may be 0.02C, the first voltage may be 4.5V, the third charge-discharge rate may be 0.2C, and the second voltage may be 3V.

Because the correspondence between the plurality of temperatures and the plurality of internal resistance change coefficients is also stored in the electronic device, for convenience of distinction, in the embodiment of the disclosure, the correspondence between the plurality of temperatures and the plurality of internal resistance change coefficients is referred to as a first correspondence, and the correspondence between the plurality of temperatures and the plurality of internal resistance change coefficients is referred to as a second correspondence.

After the electronic device obtains the current temperature, if the current temperature is found from the plurality of temperatures in the first corresponding relation, the internal resistance change rate corresponding to the current temperature can be determined in the first corresponding relation, and the maximum internal resistance change rate corresponding to the current temperature can be determined.

If the current temperature is not found from the plurality of temperatures in the first corresponding relation, the electronic device may acquire the first temperature from the plurality of temperatures in the first corresponding relation, and determine the internal resistance change rate corresponding to the first temperature in the first corresponding relation as the maximum internal resistance change rate corresponding to the current temperature. And then, the electronic equipment can store the current temperature and the maximum internal resistance change rate corresponding to the current temperature into the first corresponding relation so as to update the first corresponding relation.

Or, the electronic device may acquire the second temperature from the plurality of temperatures in the first correspondence, and determine the internal resistance change rate corresponding to the second temperature in the first correspondence as the maximum internal resistance change rate corresponding to the current temperature. And then, the electronic equipment can store the current temperature and the maximum internal resistance change rate corresponding to the current temperature into the first corresponding relation so as to update the first corresponding relation.

Or the electronic device may acquire the first temperature and the second temperature from the plurality of temperatures in the first correspondence, and determine the maximum internal resistance change rate corresponding to the current temperature according to the internal resistance change rate corresponding to the first temperature in the first correspondence and the internal resistance change rate corresponding to the second temperature. For example, the average of the internal resistance change rate corresponding to the first temperature and the internal resistance change rate corresponding to the second temperature is determined as the maximum internal resistance change rate corresponding to the current temperature. And then, the electronic equipment can store the current temperature and the maximum internal resistance change rate corresponding to the current temperature into the first corresponding relation so as to update the first corresponding relation.

The first temperature is smaller than the current temperature, the second temperature is larger than the current temperature, the difference value between the current temperature and the first temperature is smaller than a difference threshold value, and the difference value between the second temperature and the first temperature is smaller than the difference threshold value. The difference threshold is a fixed value pre-stored in the electronic device. Optionally, the first temperature is adjacent to the second temperature in the first correspondence.

Table 1 shows a first correspondence relationship of a plurality of temperatures, which may include-10 degrees celsius (°c), 0 ℃, 15 ℃, 25 ℃, 35 ℃, 45 ℃ and 55 ℃ with reference to table 1, and a plurality of internal resistance change rates. Assuming that the current temperature is 10 degrees, the electronic device may determine a first temperature of 0 ℃ and a second temperature of 15 ℃ from the plurality of temperatures, and may be equal to the first temperatureInternal resistance change rate Ht corresponding to 0 DEG C ₂ And a rate of change of internal resistance Ht corresponding to a second temperature of 15 DEG C ₃ And determining the average value of the temperature as the maximum internal resistance change rate corresponding to the current temperature.

TABLE 1

Temperature (temperature)	Rate of change of internal resistance
		-10℃	Ht ₁
0℃	Ht ₂
		15℃	Ht ₃
25℃	Ht ₄
		35℃	Ht ₅
45℃	Ht ₆
		55℃	Ht ₇

Step 204, obtaining an internal resistance change coefficient corresponding to the current temperature.

After the electronic equipment obtains the current temperature of the built-in battery, the internal resistance change coefficient corresponding to the current temperature can be obtained.

Optionally, the electronic device may store a second correspondence between the plurality of temperatures and the plurality of internal resistance change coefficients in advance. If the electronic device finds the current temperature from the plurality of temperatures in the second corresponding relation, the electronic device can determine an internal resistance change coefficient corresponding to the current temperature from the corresponding relation.

If the current temperature is not found from the second corresponding relation, the electronic device may acquire the first temperature from the plurality of temperatures in the second corresponding relation, and determine the internal resistance change coefficient corresponding to the first temperature in the second corresponding relation as the internal resistance change coefficient corresponding to the current temperature. And then, the electronic equipment can store the current temperature and the internal resistance change coefficient corresponding to the current temperature into the second corresponding relation so as to update the second corresponding relation.

Or the electronic device may acquire the second temperature from the plurality of temperatures in the second correspondence, and determine the internal resistance change coefficient corresponding to the second temperature in the second correspondence as the internal resistance change coefficient corresponding to the current temperature. And then, the electronic equipment can store the current temperature and the internal resistance change coefficient corresponding to the current temperature into the second corresponding relation so as to update the second corresponding relation.

Or the electronic device may obtain the first temperature and the second temperature from the plurality of temperatures in the second corresponding relationship, and determine the internal resistance change coefficient corresponding to the current temperature according to the internal resistance change coefficient corresponding to the first temperature in the second corresponding relationship and the internal resistance change coefficient corresponding to the second temperature. For example, the average value of the internal resistance change coefficient corresponding to the first temperature and the internal resistance change coefficient corresponding to the second temperature is determined as the internal resistance change coefficient corresponding to the current temperature. And then, the electronic equipment can store the current temperature and the internal resistance change coefficient corresponding to the current temperature into the second corresponding relation so as to update the second corresponding relation.

Table 2 shows a second correspondence of a plurality of temperatures to a plurality of internal resistance change coefficients, refer to Table 2 Assuming that the current temperature is 10 degrees, the electronic device may determine a first temperature of 0 ℃ and a second temperature of 15 ℃ from the plurality of temperatures, and may determine an internal resistance change coefficient K corresponding to the first temperature of 0 °c ₂ And a coefficient of variation K of internal resistance corresponding to a second temperature of 15 DEG C ₃ Is determined as the internal resistance change coefficient of the current temperature.

TABLE 2

Temperature (temperature)	Coefficient of internal resistance change
		-10℃	K ₁
0℃	K ₂
		15℃	K ₃
25℃	K ₄
		35℃	K ₅
45℃	K ₆
		55℃	K ₇

In the embodiment of the disclosure, if the electronic device obtains the internal resistance change coefficient corresponding to the current temperature for the first time, the internal resistance change coefficient is an initial internal resistance change coefficient corresponding to the current temperature, and if the internal resistance change coefficient of the current temperature is not obtained for the first time, the internal resistance change coefficient is an updated internal resistance change coefficient corresponding to the current temperature.

It is understood that the developer may store a second correspondence relationship between the plurality of temperatures and the plurality of initial internal resistance change coefficients into the electronic device before shipment of the electronic device. When the electronic equipment detects that the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio for the first time, the current temperature of the built-in battery can be obtained, if the current temperature exists in the plurality of temperatures in the second corresponding relation, the initial internal resistance change coefficient corresponding to the current temperature can be obtained, and at the moment, the electronic equipment obtains the internal resistance change coefficient corresponding to the current temperature for the first time. After determining the cycle number of the built-in battery according to the current internal resistance of the built-in battery, the initial internal resistance of the built-in battery and the initial internal resistance change coefficient corresponding to the current temperature, the electronic device can update the initial internal resistance change coefficient corresponding to the current temperature, thereby realizing updating of the second corresponding relation.

The cycle number of the built-in battery refers to the cycle number of the built-in battery from the activation of the electronic device to the current moment. One cycle of the built-in battery means that the built-in battery completes one full charge and discharge. The full charge refers to continuously charging the internal battery with the first charge-discharge rate until the voltage of the internal battery is the first voltage, and then charging the internal battery with the first voltage until the charge-discharge rate of the internal battery is the second charge-discharge rate. The full discharge means that the internal battery is discharged at the third charge-discharge magnification until the voltage of the internal battery is the second voltage.

If the current temperature does not exist in the plurality of temperatures in the second corresponding relation, and the electronic equipment determines the initial internal resistance change coefficient corresponding to the current temperature according to the initial internal resistance change coefficient corresponding to the first temperature and/or the initial internal resistance change coefficient corresponding to the second temperature, the electronic equipment can update the initial internal resistance change coefficient corresponding to the current temperature after determining the cycle times of the built-in battery according to the current internal resistance of the built-in battery, the initial internal resistance of the built-in battery and the initial internal resistance change coefficient corresponding to the current temperature, and the updated internal resistance change coefficient corresponding to the current temperature is added in the second corresponding relation, so that the second corresponding relation is updated.

And if the electronic equipment detects that the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio for the first time, the current temperature of the built-in battery can be acquired again. If the current temperature acquired at this time is the same as the current temperature acquired at the last time, the internal resistance change coefficient corresponding to the current temperature acquired at this time is an updated internal resistance change coefficient obtained by updating the initial internal resistance change coefficient. If the current temperature acquired at this time is different from the current temperature acquired at last time, the internal resistance change coefficient corresponding to the current temperature acquired at this time of the electronic equipment is the initial internal resistance change coefficient corresponding to the current temperature.

Because the built-in battery has certain aging in the period of detecting the health degree of the built-in battery twice, the cycle number of the built-in battery is determined by adopting the updated internal resistance change coefficient, and the accuracy of determining the cycle number of the built-in battery is ensured.

In an optional implementation manner of this embodiment of the present disclosure, the initial internal resistance change coefficient corresponding to the current temperature is a slope of an internal resistance change of the first test battery along with the cycle number of the first test battery when the temperature of the first test battery is the current temperature, and a jth internal resistance of the plurality of internal resistances of the first test battery is tested in a process of performing a jth cycle on the first test battery, where j is a positive integer.

Optionally, under the condition that the temperature of the first test battery is the current temperature, a least square method may be adopted to perform function fitting on the plurality of internal resistances of the first test battery and the plurality of circulation times, so as to obtain a linear function, and a slope of the linear function is determined as an initial internal resistance change coefficient corresponding to the current temperature. The cycle number corresponding to the j-th internal resistance in the multiple internal resistances of the first test battery is j.

In another optional implementation manner of the embodiment of the present disclosure, the initial internal resistance change coefficient K corresponding to the current temperature may satisfy:

the first change coefficient k1 is a slope of the internal resistance of the second test battery changing along with the cycle number of the second test battery under the condition that the temperature of the second test battery is the current temperature, and a jth internal resistance of the plurality of internal resistances of the second test battery is tested in the process of performing the jth cycle on the second test battery. The reference number C1 is the rated capacity of the second test battery, and C is the rated capacity of the built-in battery. The second test battery is a battery used for testing related data before leaving the factory.

Alternatively, the developer may perform function fitting on the plurality of internal resistances of the second test battery and the index of the plurality of cycle times by using a least square method to obtain a linear function, and determine a slope of the linear function as the first change coefficient k1. The cycle number corresponding to the j-th internal resistance in the multiple internal resistances of the second test battery is j.

The second change coefficient k2 is a slope of an internal resistance of the third test battery according to a cycle number of the third test battery when the temperature of the third test battery is the current temperature, and a jth internal resistance of the plurality of internal resistances of the third test battery is tested in a jth cycle of the third test battery. And C2 is the rated capacity of the third test battery, and C is greater than C2 and less than C1. That is, the rated capacity of the built-in battery is larger than the rated capacity of the second test battery and smaller than the rated capacity of the third test battery. The second test battery is a battery used for testing related data before shipment.

Alternatively, the developer may perform function fitting on the plurality of internal resistances of the third test battery and the plurality of cycle times by using a least square method to obtain a linear function, and determine a slope of the linear function as the second change coefficient k2. The cycle number corresponding to the j-th internal resistance in the multiple internal resistances of the third test battery is j.

Step 205, determining the cycle number of the built-in battery according to the current internal resistance of the built-in battery, the initial internal resistance of the built-in battery and the internal resistance change coefficient.

After determining the internal resistance change coefficient corresponding to the current temperature, the electronic equipment acquires the initial internal resistance of the built-in battery, and can determine the cycle number of the built-in battery according to the current internal resistance of the built-in battery, the initial internal resistance of the built-in battery and the internal resistance change coefficient.

The initial internal resistance r1 of the built-in battery is the internal resistance of the built-in battery when the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio for the first time. The initial internal resistance of the built-in battery may be recorded in the electronic device. The cycle number C is proportional to the difference r between the current internal resistance r2 and the initial internal resistance r1, and is inversely related to the internal resistance change coefficient M. The number of cycles C may satisfy:

it can be understood that the longer the use time of the internal battery, the more the cycle number of the internal battery, the larger the current internal resistance of the internal battery, and the larger the difference between the current internal resistance and the initial internal resistance of the internal battery, and the more serious the corresponding aging degree of the internal battery.

Step 206, determining the health of the built-in battery according to the current internal resistance change rate of the current internal resistance relative to the initial internal resistance of the built-in battery and the maximum internal resistance change rate.

After the electronic device obtains the current internal resistance and the initial internal resistance of the built-in battery, a difference value r between the current internal resistance r2 and the initial internal resistance r1 of the built-in battery can be determined, and the difference value r can meet the following requirements: r=r2-r 1. Then, the electronic device may determine the current internal resistance change rate according to the ratio of the difference r to the initial internal resistance r1. Wherein the current internal resistance change rate is used for indicating the current aging degree of the built-in battery.

Alternatively, the electronic device may directly connect theThe ratio of the difference value r to the initial internal resistance r1 is determined as the current internal resistance change rate h, which can satisfyOr the electronic device can determine the product of the ratio and the preset coefficient s as the current internal resistance change rate h which can meet +.>The preset coefficient is a fixed value stored in the electronic equipment in advance.

In an optional implementation manner of the embodiment of the present disclosure, the electronic device may determine the health of the built-in battery according to a ratio or a difference between the current internal resistance change rate and the maximum internal resistance change rate. Wherein the health is inversely related to the ratio and the health is positively related to the difference. That is, the greater the ratio, the closer the current internal resistance of the built-in battery is to the maximum internal resistance of the first test battery, the lower the health of the built-in battery, and the more serious the corresponding aging degree of the built-in battery. The smaller the difference value is, the closer the current internal resistance of the built-in battery is to the maximum internal resistance of the first test battery, the lower the health of the built-in battery is, and the more serious the aging degree of the corresponding built-in battery is.

Alternatively, the health degree S may satisfy:wherein H is the current internal resistance change rate, H is the maximum internal resistance change rate, and the health S can be expressed as a percentage. Alternatively, the health degree S may satisfy: s=h-H.

In another optional implementation manner of the embodiment of the present disclosure, the electronic device may determine the health of the built-in battery according to a ratio of the current internal resistance change rate and the maximum internal resistance change rate, and the number of cycles. The health is inversely related to the cycle number, that is, the more the cycle number of the built-in battery is, the lower the health of the built-in battery is, and the more the corresponding aging degree of the built-in battery is.

Alternatively, the electronic device may determine the product of the number of cycles and the ratio as the health of the built-in battery. The ratio is a ratio of the current internal resistance change rate and the maximum internal resistance change rate.

In still another optional implementation manner of the embodiment of the present disclosure, the electronic device may determine the health of the built-in battery according to a ratio of the current internal resistance change rate and the maximum internal resistance change rate, the number of cycles, and a ratio of the current capacity of the built-in battery to the rated capacity of the built-in battery.

Optionally, the electronic device may determine a mean value of a ratio of the current internal resistance change rate to the maximum internal resistance change rate to a ratio of the current capacity of the built-in battery to the rated capacity of the built-in battery, and determine a product of the mean value and the cycle number as the health of the built-in battery.

Step 207, subtracting the target value from the internal resistance change coefficient corresponding to the current temperature to update the internal resistance change coefficient corresponding to the current temperature.

After the electronic device determines the cycle number of the built-in battery according to the current internal resistance, the initial internal resistance and the internal resistance change coefficient, the target value can be subtracted from the internal resistance change coefficient corresponding to the current temperature, so that the internal resistance change coefficient corresponding to the current temperature is updated, and further, when the electronic device detects that the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio, the electronic device can determine the cycle number of the built-in battery based on the updated internal resistance change coefficient. Wherein the target value may be greater than or equal to 0.001 and less than or equal to 0.1.

For example, the electronic device may determine the difference between the internal resistance change coefficient M and the target value Δm as an updated internal resistance change coefficient G corresponding to the current temperature, where the updated internal resistance change coefficient G may satisfy: g=m- Δm.

The following describes a process of determining the first correspondence relationship and the second correspondence relationship stored by the electronic device before shipment:

before the electronic equipment leaves the factory, a developer can respectively place a plurality of first test batteries in different environment temperatures, for an ith first test battery, the developer can repeatedly control the ith first test battery to perform multiple cycles, and in the process of controlling the ith first test battery to perform each cycle, the internal resistance of the ith first test battery is determined, so that a plurality of internal resistances corresponding to the multiple cycles can be obtained.

In the process of determining the internal resistance corresponding to each cycle, a developer may first control the i first test battery to discharge for 10s at the intensity of 0.1C, record the voltage of the i first test battery after discharge as V1, then control the i first test battery to discharge for 200ms at the intensity of 1C, and record the voltage of the i first test battery after discharge as V2, so that the developer may determine the internal resistance corresponding to the cycle, and the internal resistance D may satisfy:

after each cycle, the developer may also test the capacity retention rate of the ith first test battery, if the capacity retention rate of the ith first test battery is less than or equal to the preset threshold, the developer may determine that the ith first test battery is scrapped, i.e., the ith first test battery is no longer usable, and the developer may record the internal resistance determined by the last cycle, where the internal resistance is the maximum internal resistance of the ith first test battery. Wherein the preset threshold may be 80%.

The developer can determine the maximum internal resistance change rate of the ith first test battery according to the maximum internal resistance of the ith first test battery and the initial internal resistance of the first test battery, wherein the maximum internal resistance change rate H meets the following conditions:therefore, the maximum internal resistance change rate corresponding to the ambient temperature of the ith first test battery can be obtained. The initial internal resistance of the first test battery is obtained by comparing the residual capacity of the first test battery with the first test powerAnd when the ratio of the rated capacities of the cells reaches the target ratio for the first time, the internal resistance of the battery is tested.

It is understood that the temperature of the ith first test battery is substantially consistent with the ambient temperature where the ith first test battery is located, so that a developer may determine a plurality of maximum internal resistance change rates corresponding to the plurality of ambient temperatures as the first corresponding relationship, and store the determined maximum internal resistance change rates in the electronic device.

And, for each first test battery, the developer may further determine the slope of the variation of the plurality of internal resistances of the first test battery with the number of cycles as an initial internal resistance variation coefficient corresponding to the ambient temperature where the first test battery is located, thereby obtaining a plurality of initial internal resistance variation coefficients corresponding to the plurality of ambient temperatures. And a plurality of initial internal resistance change coefficients corresponding to a plurality of ambient temperatures can be stored into the electronic device as a second corresponding relationship.

In the embodiment of the disclosure, the developer may further place a plurality of second test batteries in different ambient temperatures, and for each second test battery, the developer may repeatedly control the second test battery to perform multiple cycles, and determine the internal resistance of the second test battery in the process of controlling the second test battery to perform one cycle, so that multiple internal resistances corresponding to multiple cycles can be obtained. Further, for each second test resistor, the developer can determine the slope of the variation of the internal resistances of the second test battery along with the cycle number as a first variation coefficient k1 corresponding to the environmental temperature of the second test battery, so as to obtain a first variation coefficient k1 corresponding to the environmental temperatures.

The developer can also place a plurality of third test batteries in different environment temperatures, and for each third test battery, the developer can repeatedly control the third test battery to perform multiple cycles, and determine the internal resistance of the third test battery in the process of controlling the third test battery to perform one cycle, so that a plurality of internal resistances corresponding to multiple cycles can be obtained. Further, for each third test battery, the developer may determine the slope of the variation of the plurality of internal resistances of the third test battery with the number of cycles as a second variation coefficient k2 corresponding to the environmental temperature where the third test battery is located, so as to obtain a second variation coefficient k2 corresponding to the plurality of environmental temperatures. Furthermore, the developer can determine the initial internal resistance change coefficient K corresponding to the plurality of environmental temperatures according to the first change coefficient K1 corresponding to the plurality of environmental temperatures, the second change coefficient K2 corresponding to the plurality of environmental temperatures, the rated capacity C of the built-in battery, the rated capacity C1 of the second test battery and the rated capacity C2 of the third test battery.

It should be noted that, the plurality of different environmental temperatures of the plurality of first test batteries, the plurality of different environmental temperatures of the plurality of second test batteries, and the plurality of different environmental temperatures of the plurality of third test batteries are the same, and the number of the plurality of first test batteries, the number of the plurality of second test batteries, and the number of the plurality of third test batteries are the same. One cycle per first test cell, one cycle per second test cell, and one cycle per third test cell are all full-charge-discharge.

It should be noted that, the sequence of the steps of the method for determining the health degree of the battery provided by the embodiment of the disclosure may be appropriately adjusted, and the steps may be deleted according to circumstances. For example, steps 204 and 205 may be deleted as appropriate. Any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered in the protection scope of the present disclosure, and thus will not be repeated.

Fig. 4 is a block diagram of an electronic device according to an embodiment of the present disclosure, and referring to fig. 4, the electronic device includes:

the first obtaining module 401 is configured to obtain the current internal resistance and the current temperature of the built-in battery if the ratio of the remaining capacity of the built-in battery to the rated capacity of the built-in battery of the electronic device reaches a target ratio.

A second obtaining module 402, configured to obtain a maximum internal resistance change rate corresponding to the current temperature.

A determining module 403, configured to determine the health of the internal battery according to the current internal resistance change rate of the current internal resistance relative to the initial internal resistance of the internal battery and the maximum internal resistance change rate.

The initial internal resistance of the built-in battery is the internal resistance of the built-in battery when the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches a target ratio for the first time, and the maximum internal resistance change rate is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery.

In summary, the embodiment of the present disclosure provides an electronic device, where when a ratio of a remaining capacity of a built-in battery to a rated capacity of the built-in battery reaches a target ratio, the electronic device may determine a health degree of the built-in battery according to a current internal resistance change rate of a current internal resistance of the built-in battery relative to an initial internal resistance of the built-in battery and a maximum internal resistance change rate corresponding to a current temperature. In the process of determining the health degree of the built-in battery, the maximum internal resistance change rate of the built-in battery at the current temperature is considered, and is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery, so that the accuracy of determining the health degree of the built-in battery is effectively improved.

Optionally, the determining module 403 is configured to:

determining the health of the built-in battery according to the ratio or the difference value of the current internal resistance change rate and the maximum internal resistance change rate,

wherein, the health degree is inversely related to the ratio, and the health degree is positively related to the difference.

Optionally, the health degree S satisfies:

wherein H is the current internal resistance change rate, and H is the maximum internal resistance change rate.

Optionally, a plurality of temperatures and internal resistance change rates corresponding to the plurality of temperatures are recorded in a corresponding relation stored in the electronic equipment; the maximum internal resistance change rate corresponding to the current temperature is obtained, which comprises the following steps:

determining the maximum internal resistance change rate corresponding to the current temperature according to the corresponding relation;

wherein the internal resistance change rate Ht corresponding to the ith temperature in the corresponding relation _i The method meets the following conditions:

H _i to obtain the internal resistance, he, of the first test battery when the ratio of the residual capacity of the first test battery to the rated capacity of the first test battery reaches the target ratio for the first time at the ith temperature _i In order to maximize the internal resistance of the first test battery at the ith temperature, the rated capacity of the first test battery is equal to the rated capacity of the built-in battery, and i is a positive integer.

Optionally, the second obtaining module 402 is configured to obtain an internal resistance change coefficient corresponding to the current temperature after obtaining the current internal resistance and the current temperature of the internal battery, where if the internal resistance change coefficient of the current temperature is obtained for the first time, the internal resistance change coefficient is an initial internal resistance change coefficient corresponding to the current temperature.

A determining module 403, configured to determine a cycle number of the built-in battery according to the current internal resistance of the built-in battery, the initial internal resistance of the built-in battery, and the internal resistance change coefficient, where the cycle number is proportional to a difference between the current internal resistance and the initial internal resistance, and the cycle number is inversely related to the internal resistance change coefficient.

Referring to fig. 5, the electronic device may further include: and an updating module 404, configured to subtract the target value from the internal resistance change coefficient corresponding to the current temperature, so as to update the internal resistance change coefficient corresponding to the current temperature.

Optionally, the initial internal resistance change coefficient corresponding to the current temperature is a slope of the internal resistance change of the first test battery along with the cycle number of the first test battery under the condition that the temperature of the first test battery is the current temperature;

the rated capacity of the first test battery is equal to the rated capacity of the built-in battery.

Optionally, the initial internal resistance change coefficient K corresponding to the current temperature satisfies:

the first change coefficient k1 is a slope of the change of the internal resistance of the second test battery along with the cycle number of the second test battery under the condition that the temperature of the second test battery is the current temperature, C1 is the rated capacity of the second test battery, and C is the rated capacity of the built-in battery.

The second change coefficient k2 is a slope of the internal resistance of the third test battery changing with the number of cycles of the third test battery under the condition that the temperature of the third test battery is the current temperature, C2 is the rated capacity of the third test battery, and C is greater than C2 and less than C1.

Optionally, the target value is greater than or equal to 0.001 and less than or equal to 0.1.

Fig. 5 is a block diagram of another electronic device provided by an embodiment of the disclosure, and referring to fig. 5, the electronic device 500 may include: a processor 501, a memory 502 and a display 503.

Processor 501 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 501 may be implemented in at least one hardware form of DSP (digital signal processing ), FPGA (field-programmable gate array, field programmable gate array), PLA (programmable logic array ). The processor 501 may also include a main processor and a coprocessor, the main processor being a processor for processing data in an awake state, also referred to as a CPU (central processing unit ); a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 501 may be integrated with a GPU (graphics processing unit, image processor) for taking care of rendering and rendering of content that the display screen is required to display. In some embodiments, the processor 501 may also include an AI (artificial intelligence ) processor for processing computing operations related to machine learning.

Memory 502 may include one or more computer-readable storage media, which may be non-transitory. Memory 502 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 502 is used to store at least one instruction for execution by processor 501 to implement the method of determining the health of a battery provided by the method embodiments of the present disclosure.

The display screen 503 is used to display a UI (user interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 503 is a touch screen, the display screen 503 also has the ability to capture touch signals at or above the surface of the display screen 503. The touch signal may be input as a control signal to the processor 501 for processing. At this time, the display screen 503 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 503 may be one and disposed on the front panel of the electronic device 500; in other embodiments, the display screen 503 may be at least two, and disposed on different surfaces of the electronic device 500 or in a folded design; in other embodiments, the display 503 may be a flexible display disposed on a curved surface or a folded surface of the electronic device 500. Even further, the display screen 503 may be arranged in an irregular pattern other than a rectangle, i.e., a shaped screen. The display screen 503 may be made of LCD (liquid crystal display ), OLED (organic light-emitting diode) or other materials.

Optionally, with continued reference to fig. 5, the electronic device 500 may further include: a peripheral interface 504 and at least one peripheral. The processor 501, memory 502, and peripheral interface 504 may be connected by a bus or signal line. Individual peripheral devices may be connected to peripheral device interface 504 by buses, signal lines, or a circuit board. For example, the peripheral device may include: one of radio frequency circuitry 505, camera assembly 506, audio circuitry 507, positioning assembly 508, and power supply 509. Wherein the display 503 also belongs to the peripheral device.

Peripheral interface 504 may be used to connect at least one Input/Output (I/O) related peripheral to processor 501 and memory 502. In some embodiments, processor 501, memory 502, and peripheral interface 504 are integrated on the same chip or circuit board; in some other embodiments, either or both of the processor 501, memory 502, and peripheral interface 504 may be implemented on separate chips or circuit boards, which is not limited in this embodiment.

The radio frequency circuit 505 is used to receive and transmit RF (radio frequency) signals, also known as electromagnetic signals. The radio frequency circuitry 505 communicates with a communication network and other communication devices via electromagnetic signals. The radio frequency circuit 505 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 505 includes: antenna systems, RF transceivers, one or more amplifiers, tuners, oscillators, digital signal processors, codec chipsets, subscriber identity module cards, and so forth. The radio frequency circuitry 505 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: the world wide web, metropolitan area networks, intranets, generation mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi networks. In some embodiments, the radio frequency circuitry 505 may also include NFC (near field communication, short range wireless communication) related circuitry, which is not limited by the disclosed embodiments.

The camera assembly 06 is used to capture images or video. Optionally, the camera assembly 06 includes a front camera and a rear camera. Typically, the front camera is disposed on the front panel of the terminal and the rear camera is disposed on the rear surface of the terminal. In some embodiments, the at least two rear cameras are any one of a main camera, a depth camera, a wide-angle camera, and a tele camera, so as to realize that the main camera and the depth camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting and VR (virtual reality) shooting function or other fusion shooting functions. In some embodiments, camera assembly 06 may also include a flash. The flash lamp can be a single-color temperature flash lamp or a double-color temperature flash lamp. The dual-color temperature flash lamp refers to a combination of a warm light flash lamp and a cold light flash lamp, and can be used for light compensation under different color temperatures.

The audio circuitry 507 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 501 for processing, or inputting the electric signals to the radio frequency circuit 505 for voice communication. For purposes of stereo acquisition or noise reduction, the microphone may be multiple and separately disposed at different locations of the electronic device 500. The microphone may also be an array microphone or an omni-directional pickup microphone. The speaker is used to convert electrical signals from the processor 501 or the radio frequency circuit 505 into sound waves. The speaker may be a conventional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only the electric signal can be converted into a sound wave audible to humans, but also the electric signal can be converted into a sound wave inaudible to humans for ranging and other purposes. In some embodiments, audio circuitry 507 may also include a headphone jack.

The location component 508 is used to locate the current geographic location of the electronic device 500 to enable navigation or LBS (location based service, location-based services). The positioning component 508 may be a positioning component based on the United states GPS (global positioning system ), the Beidou system of China, or the Galileo system of Russia.

The power supply 509 is used to power the various components in the electronic device 500. The power supply 509 may be an ac, dc or built-in battery. The built-in battery may be a rechargeable battery. When the power supply 509 comprises a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.

Those skilled in the art will appreciate that the structure shown in fig. 5 is not limiting of the electronic device 500 and may include more or fewer components than shown, or may combine certain components, or may employ a different arrangement of components.

The present disclosure also provides a computer readable storage medium storing a computer program loaded and executed by a processor to implement the method for determining the health of a battery provided by the above method embodiment.

Embodiments of the present disclosure provide a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the display device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the method for determining the health of the battery provided by the above method embodiment.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

It is understood that the meaning of the term "plurality" in the embodiments of the present disclosure means two or more.

Reference herein to "and/or" means that there may be three relationships, e.g., a and/or B, which may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The terms "first," "second," and the like in the embodiments of the present disclosure are used to distinguish between identical or similar items that have substantially identical function and function, and it should be understood that the terms "first," "second," and "n" do not have a logical or chronological dependency relationship, nor do they limit the number and order of execution.

The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims

1. A method for determining the health of a battery, which is applied to an electronic device, wherein the electronic device comprises a built-in battery; the method comprises the following steps:

obtaining the maximum internal resistance change rate corresponding to the current temperature;

The initial internal resistance of the built-in battery is the internal resistance of the built-in battery when the ratio of the residual capacity of the built-in battery to the rated capacity of the built-in battery reaches the target ratio for the first time, and the maximum internal resistance change rate is the change rate of the maximum internal resistance of the built-in battery at the current temperature relative to the initial internal resistance of the built-in battery.

2. The method of claim 1, wherein the determining the health of the built-in battery from the current internal resistance change rate of the current internal resistance relative to the initial internal resistance of the built-in battery and the maximum internal resistance change rate comprises:

determining the health degree of the built-in battery according to the ratio or the difference value of the current internal resistance change rate and the maximum internal resistance change rate;

wherein the health is inversely related to the ratio and the health is positively related to the difference.

3. The method according to claim 2, characterized in that the health degree S satisfies:

4. A method according to any one of claims 1 to 3, wherein a plurality of temperatures and internal resistance change rates corresponding to the plurality of temperatures are recorded in correspondence relations stored in the electronic device; the obtaining the maximum internal resistance change rate corresponding to the current temperature includes:

Determining a maximum internal resistance change rate corresponding to the current temperature according to the corresponding relation;

the H is _i To obtain the internal resistance of the first test battery when the ratio of the residual capacity of the first test battery to the rated capacity of the first test battery reaches the target ratio for the first time at the ith temperature, the He _i And for the maximum internal resistance of the first test battery at the ith temperature, the rated capacity of the first test battery is equal to the rated capacity of the built-in battery, and i is a positive integer.

5. A method according to any one of claims 1 to 3, wherein after said respectively acquiring the current internal resistance and the current temperature of the built-in battery, the method further comprises:

obtaining an internal resistance change coefficient corresponding to the current temperature, wherein if the internal resistance change coefficient of the current temperature is obtained for the first time, the internal resistance change coefficient is an initial internal resistance change coefficient corresponding to the current temperature;

determining the cycle number of the built-in battery according to the current internal resistance of the built-in battery, the initial internal resistance of the built-in battery and the internal resistance change coefficient, wherein the cycle number is proportional to the difference value between the current internal resistance and the initial internal resistance, and the cycle number is inversely related to the internal resistance change coefficient;

Subtracting a target value from the internal resistance change coefficient corresponding to the current temperature to update the internal resistance change coefficient corresponding to the current temperature.

6. The method according to claim 5, wherein the initial internal resistance change coefficient corresponding to the current temperature is a slope of an internal resistance change of a first test battery with the number of cycles of the first test battery in a case where the temperature of the first test battery is the current temperature;

7. The method according to claim 5, wherein the initial internal resistance change coefficient K corresponding to the current temperature satisfies:

the first change coefficient k1 is a slope of an internal resistance of the second test battery changing along with the cycle number of the second test battery under the condition that the temperature of the second test battery is the current temperature, C1 is a rated capacity of the second test battery, and C is a rated capacity of the built-in battery;

the second change coefficient k2 is a slope of an internal resistance of the third test battery changing with the number of cycles of the third test battery when the temperature of the third test battery is the current temperature, C2 is a rated capacity of the third test battery, and C is greater than C2 and less than C1.

8. The method of claim 5, wherein the target value is greater than or equal to 0.001 and less than or equal to 0.1.

9. An electronic device, the electronic device comprising:

10. An electronic device, the electronic device comprising: a built-in battery, a processor and a memory, the memory storing a computer program that is loaded and executed by the processor to implement the method of determining the health of a battery as claimed in any one of claims 1 to 8.

11. A computer readable storage medium storing a computer program loaded and executed by a processor to implement the method of determining the health of a battery according to any one of claims 1 to 8.