Charging control method and device, and storage medium

Abstract

The invention discloses a charging control method and device, and a storage medium, and the method comprises the steps: obtaining first charging data corresponding to each electric signal feature in electric signal features with different values under the condition that a first battery inputs a first charging signal; based on the first charging data, first impedance data is determined, and the first impedance data represents the change rule of impedance along with the electric signal characteristics under the condition that the first charging signal is input into the first battery; according to the first impedance data and second impedance data, the charging strategy of the first battery is controlled, and the second impedance data represents the change rule of impedance along with the electric signal characteristics under the condition that lithium is not separated out from the battery.

Description

Technical Field

[0001] The present application relates to terminal control technology, and in particular to a charging control method and device, and a storage medium. Background Art

[0002] Fast charging often triggers side reactions in the battery. Taking lithium-ion batteries with graphite negative electrode systems as an example, the electrodes of the battery polarize during charging, and the polarization potential deviates from the equilibrium potential. The electrode potential, that is, the difference between the polarization potential and the equilibrium potential, is the overpotential. Among them, when the negative electrode overpotential is lower than 0V vs. Li / Li+, lithium metal will precipitate on the surface of the negative electrode, damaging the battery performance. In severe cases, it may also cause safety accidents such as thermal runaway. In addition, the faster the charging rate, the more obvious the voltage polarization, and the battery reaches the charging cut-off voltage faster, resulting in insufficient charged power. The remaining power needs to be charged through a constant voltage and low-rate current, which in turn prolongs the charging time.

[0003] Electrode potential is an important reference quantity for measuring whether lithium deposition occurs during the charging process. However, the negative electrode potential is an internal parameter of the battery and cannot be obtained through the external characteristics of the battery. Therefore, in the relevant technology, it is impossible to determine whether lithium deposition occurs in electronic equipment, resulting in safety hazards caused by charging the battery in a lithium deposition state. Summary of the invention

[0004] The embodiments of the present application provide a charging control method and device, and a storage medium, which can realize safe and fast charging of a battery.

[0005] The technical solution of the embodiment of the present application is implemented as follows:

[0006] The present application provides a charging control method, the method comprising:

[0007] Acquire first charging data corresponding to each electrical signal feature among electrical signal features with different values ​​when the first battery is input with a first charging signal;

[0008] Determine first impedance data based on the first charging data, where the first impedance data represents a change rule of the impedance of the first battery following the characteristics of the electrical signal when the first charging signal is input;

[0009] The charging strategy of the first battery is controlled according to the first impedance data and the second impedance data, wherein the second impedance data characterizes a change rule of the impedance of the battery with the electrical signal characteristics when no lithium is deposited.

[0010] An embodiment of the present application provides an electronic device, the electronic device comprising:

[0011] A first acquisition unit is configured to acquire first charging data corresponding to each electrical signal feature of electrical signal features with different values ​​when the first charging signal is input to the first battery;

[0012] A first determining unit is configured to determine first impedance data based on the first charging data, where the first impedance data represents a change rule of the impedance of the first battery following the characteristics of the electrical signal when the first charging signal is input;

[0013] The control unit is configured to control the charging strategy of the first battery according to the first impedance data and the second impedance data, wherein the second impedance data represents a change rule of the impedance of the battery with the electrical signal characteristics when no lithium is deposited.

[0014] An embodiment of the present application provides an electronic device, including a first battery and a processor, wherein the processor is configured to:

[0015] Acquire first charging data corresponding to each electrical signal feature among electrical signal features with different values ​​when the first battery is input with a first charging signal;

[0016] Determine first impedance data based on the first charging data, where the first impedance data represents a change rule of the impedance of the first battery following the characteristics of the electrical signal when the first charging signal is input;

[0017] The charging strategy of the first battery is controlled according to the first impedance data and the second impedance data, wherein the second impedance data characterizes a change rule of the impedance of the battery with the electrical signal characteristics when no lithium is deposited.

[0018] An embodiment of the present application provides an electronic device, including a first battery, a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps in the above-mentioned charging control method are implemented.

[0019] An embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned charging control method is implemented.

[0020] The chip provided in the embodiment of the present application is used to implement the above-mentioned charging control method. The chip includes: a processor, which is used to call and run a computer program from a memory so that a device equipped with the chip executes the above-mentioned charging control method.

[0021] The charging control method, device, and storage medium provided in the embodiments of the present application obtain first charging data corresponding to each electrical signal feature in electrical signal features with different values ​​when a first charging signal is input to the first battery; determine first impedance data based on the first charging data, the first impedance data characterizing how the impedance of the first battery changes with the electrical signal feature when the first charging signal is input; control the charging strategy of the first battery based on the first impedance data and the second impedance data, the second impedance data characterizing how the impedance of the battery changes with the electrical signal feature when no lithium deposition occurs in the battery, and can effectively determine whether lithium deposition occurs in the first battery, thereby effectively avoiding safety hazards caused by charging the battery in a lithium deposition state, and achieving safe and fast charging of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an optional structural diagram of an electronic device provided in an embodiment of the present application;

[0023] Figure 2 It is an optional flow chart of the charging control method provided in the embodiment of the present application;

[0024] Figure 3 It is an optional flow chart of the charging control method provided in the embodiment of the present application;

[0025] Figure 4 It is an optional flow chart of the charging control method provided in the embodiment of the present application;

[0026] Figure 5A is an optional schematic diagram of a change rule characterized by a second impedance parameter provided in an embodiment of the present application;

[0027] Figure 5B is an optional schematic diagram of a change rule characterized by a first impedance parameter provided in an embodiment of the present application;

[0028] Figure 6 This is an optional structural diagram of a terminal device provided in an embodiment of the present application;

[0029] Figure 7 is an optional schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0030] Figure 8 is an optional schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0031] Fig. 9 It is an optional schematic structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0033] The embodiments of the present application can provide a charging control method, device and storage medium. In practical applications, the charging control method can be implemented by an electronic device, and each functional entity in the electronic device can be collaboratively implemented by hardware resources of computer devices (such as terminal devices, network devices, etc.), such as computing resources such as processors, and communication resources (such as for supporting various communication methods such as optical cables and cellular).

[0034] Of course, the embodiments of the present application are not limited to being provided as methods and hardware, and there may be multiple implementation methods, such as being provided as a storage medium (storing instructions for executing the charging control method provided by the embodiments of the present application).

[0035] The following describes various embodiments of the charging control method, device, and storage medium provided in the embodiments of the present application.

[0036] The present application embodiment provides a charging control method for an electronic device. The structure of the electronic device in the present application embodiment can be as follows: Figure 1 As shown, the electronic device 100 includes a battery 101 and a processor 102, wherein the battery is used to store electricity and provide power to other parts of the electronic device including the processor 102, and the battery can also input a charging signal provided by an external power supply to charge the battery. The processor 102 is used to perform the following processing: obtaining the first charging data corresponding to each electrical signal feature in the electrical signal features with different values ​​when the first battery inputs the first charging signal; based on the first charging data, determining the first impedance data, the first impedance data characterizes the change law of the impedance of the first battery with the electrical signal feature when the first charging signal is input; according to the first impedance data and the second impedance data, controlling the charging strategy of the first battery, the second impedance data characterizes the change law of the impedance with the electrical signal feature when the battery is not lithium-deposited. Among them, the battery 101 in the electronic device 100 can be understood as the first battery in the electronic device.

[0037] It is understandable that the electronic device may include one or more batteries. When the electronic device includes multiple batteries, the first battery may be any battery in the electronic device.

[0038] based on Figure 1 The electronic device shown in the figure, the power control method provided in the embodiment of the present application can be as follows Figure 2 As shown, the method may include:

[0039] S201: The electronic device obtains first charging data corresponding to each electrical signal feature among electrical signal features with different values ​​when a first charging signal is input to a first battery.

[0040] When the first charging signal is input to the first battery of the electronic device, the charging parameters of the electrical signal characteristics under each value in multiple values ​​are detected to obtain the first charging data corresponding to each value. The electrical signal characteristics characterize the charging status of the first battery based on the first charging signal, which may be but not limited to: charging time, current, voltage, open circuit voltage, positive electrode potential, negative electrode potential, power, battery capacity and other parameters. Among them, the difference between any two adjacent values ​​of the electrical signal characteristics can be set. Among them, the power represents the percentage of the current stored capacity to the total capacity of the battery, and the battery capacity represents the capacity currently stored by the battery. That is to say, the power and battery capacity characterize the amount of electrical energy stored in the battery from different angles. For example: the total capacity of the battery is 4000 milliampere hours (mAh), the charging capacity is 1000mAh, and the power is 25%.

[0041] Taking the charging time as an example of the electrical signal characteristic, when the first battery of the electronic device is input with the first charging signal, the charging parameters of the first battery at the following charging times can be detected to obtain the first charging data corresponding to each charging time: t1, t2, t3, ..., t70, wherein the time intervals between adjacent charging times can be the same.

[0042] Taking the electrical signal characteristic as the power level as an example, when the first battery of the electronic device inputs the first charging signal, the charging parameters of the first battery at the following power levels can be detected to obtain the first charging data corresponding to each power level: %1, %2, %3, ..., %50, wherein the power differences between adjacent power levels can be the same.

[0043] The electronic device may input the first charging signal by wireless input, i.e., wireless charging, or by wired input, i.e., wired charging. In the embodiment of the present application, there is no limitation on the input method of the first charging signal into the first battery of the first electronic device.

[0044] In the embodiment of the present application, the first charging signal may be a non-constant current and / or non-constant voltage signal, such as a sinusoidal signal, a square wave signal, a triangular wave signal, etc.

[0045] In the embodiment of the present application, the first charging signal may be an independent first power signal, or may be a superposition of the first power signal and the first disturbance signal. If the first charging signal is an independent first power signal, the first power signal is a non-constant current and / or non-constant voltage signal. If the first charging signal is a superposition of the first power signal and the first disturbance signal, the first power signal may be a constant current and / or constant voltage signal or a staged constant current and / or constant voltage signal, and the first disturbance signal is a non-constant current and / or non-constant voltage signal, such as a sinusoidal signal, a square wave signal, a triangular wave signal, etc.

[0046] When the first charging signal includes the first power signal and the first disturbance signal, the first disturbance signal causes the charging parameters of the first battery such as voltage and current output based on the first charging signal to have more precise fluctuations. For example, when there is no disturbance signal, the voltage is 4.2 volts (V) in the 1st second (s), and the voltage is 4.22V in the 2nd second; when there is a disturbance, the voltage is 4.2003V in the 1st second, 4.2011V in the 1.001s, and 4.2019V in the 1.002s.

[0047] The charging parameters detected by the electronic device when the first battery inputs the first charging signal may include but are not limited to: voltage, current, etc.

[0048] In an embodiment of the present application, the electronic device detects a group of first charging data based on an electrical signal characteristic with one value, then the number of groups of first charging data detected by the electronic device based on N electrical signal characteristics with different values ​​is N, and N is greater than 1, wherein, when the electrical signal characteristic is charging time, and the first charging data under the following charging time is detected: t1, t2, t3, ..., t70, then the value of N is 70, and when the electrical signal characteristic is power level, and the first charging data under the following power levels is detected: %1, %2, %3, ..., %50, then the value of N is 50.

[0049] A set of first charging data may be discrete time domain data.

[0050] S202: The electronic device determines first impedance data based on the first charging data, where the first impedance data represents a change pattern of the impedance of the first battery following the characteristics of the electrical signal when the first charging signal is input.

[0051] The electronic device calculates the first charging data corresponding to each electrical signal characteristic to determine the first impedance data, wherein the first impedance data may include the target impedance corresponding to each electrical signal characteristic among electrical signal characteristics with different values, thereby characterizing the change pattern of the impedance of the first battery as the electrical signal characteristic changes when the first charging signal is input.

[0052] For an electrical signal feature, the electronic device determines the impedance corresponding to the electrical signal feature based on the first charging data corresponding to the electrical signal feature. In the embodiment of the present application, the impedance calculated by the electronic device can be understood as the impedance of the first battery at a frequency in the frequency domain, that is, the first frequency, which characterizes the impedance of the battery under the input of the small amplitude AC signal of the first frequency fn. The first frequency can be located between 0.00001Hz and 1kHz. If the first frequency belongs to the ultra-high frequency region, the impedance characterizes the ohmic resistance of the first battery; if the first frequency belongs to the high frequency region, the impedance characterizes the resistance of ion diffusion migration through the SEI membrane. If the first frequency belongs to the medium frequency region, it characterizes the charge transfer resistance, and if the first frequency belongs to the low frequency region, the impedance characterizes the diffusion resistance of ion diffusion. It can be understood that in the present application, the frequency size of each region of the ultra-high frequency region, the high frequency region, the medium frequency region, and the low frequency region is relative. In one example, the frequency of the ultra-high frequency region is greater than 10kHz, the frequency of the high frequency region is greater than 100Hz and less than 10KHz, the frequency of the medium frequency region is greater than 1Hz and less than 100Hz, and the frequency of the low frequency region is less than 1Hz; the frequency division method in the embodiment of the present application is not limited in any way. In some embodiments, the first frequency may belong to a low frequency region of 0.001 Hz to 0.1 Hz.

[0053] S203. The electronic device controls a charging strategy of the first battery according to the first impedance data and the second impedance data, wherein the second impedance data represents a change rule of the impedance of the battery with the electrical signal characteristics when no lithium is deposited.

[0054] The electronic device compares the first impedance data with the second impedance data to determine whether lithium deposition is currently occurring, and controls the charging strategy of the first battery according to whether lithium deposition is currently occurring, wherein the second impedance data ensures that the impedance of the battery changes with the characteristics of the electrical signal in the case of lithium deposition. If the first impedance data matches the second impedance data, it indicates that lithium deposition is currently occurring in the first battery, and the electronic device adjusts the charging strategy so that lithium deposition does not occur in the battery; if the first impedance data does not match the second impedance data, it indicates that lithium deposition has not occurred in the first battery, and the electronic device can continue to use the current charging strategy, that is, when the first battery inputs the first charging signal, continue to use the current of the first charging signal to charge the first battery.

[0055] In the embodiment of the present application, the electronic device may compare the first impedance data with the second impedance data in the following manners, including but not limited to:

[0056] Method 1: determining the similarity between the first impedance data and the second impedance data;

[0057] Method 2: determining whether the change pattern represented by the first impedance data and the change pattern represented by the second impedance data are similar;

[0058] For the first method, if the similarity between the first impedance data and the second impedance data is less than the similarity threshold, it is considered that the first impedance data and the second impedance data match; otherwise, it is considered that the first impedance data and the second impedance data do not match.

[0059] For the second method, if the change rule represented by the first impedance data is the same as the change rule represented by the second impedance data, it is considered that the first impedance data matches the second impedance data; otherwise, it is considered that the first impedance data does not match the second impedance data.

[0060] The second impedance data may include the impedance corresponding to each electrical signal feature in the electrical signal features with different values, so as to characterize the change law of the impedance of the battery with the electrical signal feature when the charging signal is input. Here, the battery that obtains the second impedance data may be a battery without lithium deposition, wherein the second impedance data may be obtained by the electronic device from the network device side, or calculated by the data obtained from the network side, or calculated by the electronic device through the data obtained by detecting the first battery when the usage time of the first battery is less than the time threshold. In the embodiment of the present application, there is no limitation on the method of obtaining the second impedance data.

[0061] In an embodiment of the present application, first charging data corresponding to each electrical signal feature in electrical signal features with different values ​​when a first charging signal is input to the first battery is obtained; based on the first charging data, first impedance data is determined, the first impedance data characterizing how the impedance of the first battery changes with the electrical signal feature when the first charging signal is input; based on the first impedance data and the second impedance data, the charging strategy of the first battery is controlled, the second impedance data characterizing how the impedance of the battery changes with the electrical signal feature when no lithium deposition occurs, which can effectively determine whether lithium deposition occurs in the first battery, thereby effectively avoiding safety hazards caused by charging the battery in a lithium deposition state, and achieving safe and fast charging of the battery.

[0062] It should be noted that the solution for controlling the battery charging strategy based on the first impedance parameter and the second impedance data provided in the embodiment of the present application can be applied to batteries other than lithium-ion batteries, such as sodium-ion batteries and other metal ion batteries. In this case, the second impedance data correspondingly characterizes the change pattern of the battery's drilling as the electrical signal characteristics change when other metal ions such as sodium ions are precipitated.

[0063] In some embodiments, S202 determines first impedance data based on the first charging data, including:

[0064] S2021. For each of the electrical signal features having different values, determine a target impedance corresponding to the first frequency based on the corresponding first charging data;

[0065] S2022. Construct the first impedance data based on each electrical signal feature among the electrical signal features with different values ​​and the corresponding target impedance.

[0066] After the electronic device obtains the first charging data corresponding to each of the electrical signal features with different values ​​based on S201, for each electrical signal feature, based on the first charging data corresponding to the electrical signal feature, the electronic device determines the target impedance of the first battery corresponding to the electrical signal feature at the first frequency. The electronic device forms the first impedance data based on the target impedance corresponding to each electrical signal feature at the first frequency.

[0067] In one example, the electrical signal characteristic is current, and the electronic device determines the first charging data under the following currents respectively: current 1, current 2, current 3, current 4, ..., current 20. For the first charging data of each current among current 1, current 2, current 3, current 4, ..., current 20, the electronic device determines the target resistance corresponding to the current at the first frequency based on the first charging data, wherein the target resistance corresponding to each current among current 1, current 2, current 3, current 4, ..., current 20 is respectively: resistance 1, resistance 2, resistance 3, resistance 4, ..., resistance 20. Then the first resistance data includes: current 1, current 2, current 3, current 4, ..., current 20 and resistance 1, resistance 2, resistance 3, resistance 4, ..., resistance 20, and it can be determined that current 1 corresponds to resistance 1, current 2 corresponds to resistance 2, current 3 corresponds to resistance 3, and so on.

[0068] In some embodiments, the first charging data includes first voltage data and first current data. In S2021, based on the corresponding first charging data, the target impedance corresponding to the first frequency is determined, including: performing time-frequency conversion on the first voltage data to obtain first voltage spectrum data, wherein the first voltage spectrum data represents the relationship between the voltage and frequency of the first battery when the first charging signal is input; performing time-frequency conversion on the first current data to obtain first current spectrum data, wherein the first current spectrum data represents the relationship between the current and frequency of the first battery when the first charging signal is input; and determining the target impedance corresponding to the first frequency based on the target voltage corresponding to the first frequency in the first voltage spectrum data and the target current corresponding to the first frequency in the first current frequency data.

[0069] In the embodiment of the present application, the electronic device detects the voltage and current of the first battery under each electrical signal characteristic. For an electrical signal characteristic, the electronic device detects the voltage and current of the first battery under the electrical signal characteristic to obtain first voltage data and first current data; the first voltage data is discrete periodic data in the time domain, and the period of the first voltage data is the first acquisition period of the electronic device collecting voltage under the electrical signal characteristic, and the first current data is discrete periodic data in the time domain, and the period of the first current data is the second acquisition period of the electronic device collecting current under the electrical signal characteristic, and the first acquisition period and the second acquisition period may be the same.

[0070] The electronic device performs time-frequency conversion on the first voltage data to obtain first voltage spectrum data, wherein the first voltage spectrum data includes voltages at different frequencies. The electronic device performs time-frequency conversion on the first current data to obtain first current spectrum data, wherein the first current spectrum data includes currents at different frequencies. The electronic device may perform time-frequency conversion on the first voltage data or the first current data in a manner including but not limited to: Fourier transform, wavelet transform, windowed Fourier transform, etc.

[0071] After determining the first voltage spectrum data and the first current spectrum data, the electronic device determines the target voltage and target current corresponding to the first frequency in the first voltage spectrum and the first current spectrum, and determines the target resistance at the first frequency through the target voltage and the target current. The first frequency can be preset or determined according to the first impedance data.

[0072] In one example, the first voltage spectrum data determined by the electronic device includes: voltage V1 corresponding to frequency f1, voltage V2 corresponding to frequency f2, voltage V3 corresponding to frequency f3, ..., voltage V20 corresponding to frequency f20; the first current spectrum data determined by the electronic device includes: current I1 corresponding to frequency f1, current I2 corresponding to frequency f2, current I3 corresponding to frequency f3, ..., current I20 corresponding to frequency f20; if the first frequency is f5, the target resistance corresponding to the first frequency is voltage V5 / current I5.

[0073] In some embodiments, S201 obtains first charging data corresponding to each electrical signal feature in electrical signal features with different values ​​when the first battery inputs the first charging signal, including: when the first battery inputs the first charging signal, for each electrical signal feature in electrical signal features with different values, collecting the value of at least one charging parameter based on a second frequency within a first time period to obtain the first charging data, wherein the first time period and / or the second frequency are determined based on the first frequency.

[0074] For an electrical signal feature, when the electronic device measures the first charging data, it collects the value of at least one charging parameter based on the second frequency within a first time period, wherein the at least one charging parameter includes: current, voltage, etc. At least one of the first time period and the second frequency is related to the first frequency.

[0075] The first duration is the duration of collecting the first charging data corresponding to an electrical signal feature, which may be related to the first frequency. In one example, the first duration t is greater than or equal to M times Tn, where Tn is the reciprocal of the first frequency fn, and the value of M is greater than 2. In one example, t is greater than or equal to 10 times Tn.

[0076] It can be understood that, in the case where the first charging signal includes a disturbance signal, for an electrical signal feature, the duration of the disturbance signal is greater than or equal to the first duration.

[0077] The second frequency is a collection frequency fs for collecting the first charging data, which may be related to the first frequency. In one example, fs is greater than or equal to K times 2fn, where K is greater than 2. In one example, fs is greater than or equal to 10 times fn.

[0078] In some embodiments, S203 controls the charging strategy of the first battery according to the first impedance data and the second impedance data, including: if the change pattern represented by the first impedance data does not match the change pattern represented by the second impedance data, reducing the current of the first charging signal.

[0079] In the embodiment of the present application, the electronic device determines the change law characterized by the first impedance data, and determines the change law characterized by the second impedance data, and compares the two change laws. If the two change laws are consistent, it is determined that the first impedance data matches the second impedance data, and the current first battery has lithium deposition. The charging strategy for the first battery is to reduce the current size of the first charging signal. Here, the reduced current size can be 0 or greater than 0. It is understandable that if the current of the first charging signal is adjusted to 0, the charging of the first battery is stopped. If the two change laws are inconsistent, it is determined that the first impedance data does not match the second impedance data, and the current first battery has not undergone lithium deposition. The current first charging signal continues to be maintained to charge the first battery.

[0080] In the embodiment of the present application, if the first impedance data matches the second impedance data, the charging strategy of the first battery can be adjusted to a strategy for reducing the negative electrode overpotential of the battery, such as but not limited to reducing the charging current, increasing the temperature, stopping discharge, etc.

[0081] In the embodiment of the present application, lithium deposition occurs because the speed at which lithium ions enter the negative electrode is too slow, resulting in the enrichment and formation of lithium metal on the surface of the negative electrode. In the embodiment of the present application, the speed at which lithium ions enter the negative electrode is accelerated by reducing the charging current and increasing the battery temperature, thereby slowing down the lithium deposition.

[0082] In the embodiment of the present application, judging whether the changing law represented by the first impedance data is consistent with the changing law represented by the second impedance data can be understood as judging whether the trend of the impedance represented by the first impedance data along the electrical signal characteristics is the same as the trend of the impedance represented by the second impedance data along the electrical signal characteristics. If they are the same, it is considered that the changing law represented by the first impedance data is consistent with the changing law represented by the second impedance data.

[0083] In one example, the change law of the second impedance data representation is that the impedance first decreases and then increases as the value of the electrical signal characteristic increases, and begins to increase at frequency f01. If the change law of the first impedance data representation is that the impedance first decreases and then increases as the value of the electrical signal characteristic increases, and begins to increase at frequency f02, and the frequency interval between f01 and f02 is less than the set frequency interval threshold, then it is considered that the change law of the first impedance data representation is consistent with the change law of the second impedance data representation; if the change law of the first impedance data representation is that the impedance first decreases and then increases as the value of the electrical signal characteristic increases, and begins to increase at frequency f03, and the frequency interval between f01 and f03 is greater than the set frequency interval threshold, then it is considered that the change law of the first impedance data representation is inconsistent with the change law of the second impedance data representation; if the change law of the first impedance data representation is that the impedance keeps decreasing as the value of the electrical signal characteristic increases, then it is considered that the change law of the first impedance data representation is inconsistent with the change law of the second impedance data representation.

[0084] In the embodiment of the present application, whether lithium deposition occurs in the first battery is determined by determining whether the change pattern represented by the first impedance data is consistent with the change pattern represented by the second impedance data. This can easily and quickly determine whether lithium deposition occurs in the first battery.

[0085] In some embodiments, the second impedance data is calculated by the electronic device. Figure 3 As shown, the electronic device also performs the following processing:

[0086] S301, the electronic device acquires a charging data set of at least one second battery, the charging data set comprising a charging data subset corresponding to each second battery in the at least one second battery, the charging data subset being second charging data corresponding to each electrical signal feature in electrical signal features with different values ​​when the corresponding second battery is input with a second charging signal;

[0087] S302: The electronic device determines the second impedance data based on the charging data set.

[0088] The charging data set acquired by the electronic device may include a charging data subset of each second battery in at least one second battery when a second charging signal is input, wherein, for a second battery, its charging data subset includes second charging data corresponding to each electrical signal feature in electrical signal features with different values, wherein the second charging data and the first charging data are respectively a group of charging data corresponding to the first battery and the second battery, and a group of charging data includes a group of discrete time domain data.

[0089] It is understandable that for the second charging data, the type of electrical signal feature corresponding to it is the same as the type of electrical signal feature corresponding to the first charging data. For example: different first charging data correspond to voltages with different values, and different second charging data correspond to voltages with different values. For another example, different first charging data correspond to currents with different values, and different second charging data correspond to currents with different values. For another example, different first charging data correspond to charging durations with different values, and different second charging data correspond to charging durations with different values.

[0090] In one example, taking the electrical signal characteristic as charging time as an example, at least one second battery includes: battery A, battery B, and battery C, then the charging data set includes: a charging data subset of battery A, a charging data subset of battery B, and a charging data subset of battery C. The charging data subset of battery A includes the second charging data corresponding to each of the following charging times: t1, t2, t3, ..., t70.

[0091] In the embodiment of the present application, for a second battery, the number of groups of second charging data corresponding to it is the same as or different from the number of groups of first charging data corresponding to the first battery.

[0092] If the charging data set includes a charging data subset of a second battery, the charging data may be understood as the charging data subset of the second battery.

[0093] In an embodiment of the present application, the electronic device may receive a charging data set from the network side, or may obtain a charging data set by detecting a battery in the electronic device. The electronic device may include one or more batteries. If the electronic device includes only one battery, and the electronic device obtains a charging data set by detecting the battery in the electronic device, the first battery and the second battery are the same battery. If the electronic device includes multiple batteries, and the electronic device obtains a charging data set by detecting the battery in the electronic device, the multiple batteries are multiple second batteries, and the multiple second batteries may include the first battery or may not include the first battery.

[0094] For the charging data set, if the electronic device receives it from the network side, the electronic device may not need to know the signal parameters of the second charging signal. If the electronic device obtains the second charging signal from the battery in the electronic device under the input of the second charging signal, the second charging signal may be a second power supply signal of a non-constant current / non-constant voltage signal, or a superposition of a second power supply signal of a constant current signal and / or a constant voltage signal and a second disturbance signal of a non-constant current and / or non-constant voltage. The electronic device can determine the signal parameters of the second charging signal, but the electronic device does not need to pay attention to the signal parameters of the second charging signal when determining the charging data set. Here, for a charging signal, the signal parameters may include: amplitude, frequency, waveform and other parameters.

[0095] It is understandable that the first power signal and the second power signal may be the same power signal, and / or the first disturbance signal and the second disturbance signal may be the same disturbance signal.

[0096] After obtaining the charging data set, the electronic device analyzes the charging data set to obtain second impedance data.

[0097] In some embodiments, S302 determines the second impedance data based on the charging data set, including:

[0098] S3021. For a charging data subset corresponding to each second battery in the charging data set, determine, based on the charging data subset, third impedance data corresponding to each frequency, wherein the third impedance data represents a change rule of the impedance of the corresponding second battery under the corresponding second charging signal along with the electrical signal characteristics;

[0099] S3022. For each second battery in the at least one second battery, determine a third frequency based on third impedance data corresponding to each frequency, where the third impedance data corresponding to the third frequency is the second impedance data;

[0100] S3022: Determine a first frequency range based on a third frequency corresponding to each second battery in the at least one second battery, where the first frequency is within the first frequency range.

[0101] For each second battery in the at least one second battery, the electronic device determines the third impedance data of the battery at each frequency in different frequencies based on the charging data subset corresponding to the second battery in the charging data set, wherein the third impedance data is the relationship between the impedance and the electrical signal characteristics of the second battery under the second charging signal. It should be noted that the charging data subsets of each second battery in the multiple second batteries are independent of each other, and the process of determining the third impedance data by each charging sub-data is also independent of each other.

[0102] For a second battery, the third impedance data corresponding to different frequencies are determined based on the charging sub-data of the second battery, and the third frequency at which the change trend of the third impedance data corresponding to the second battery meets the set condition is determined, and the third impedance data corresponding to the third frequency is the second impedance data. It is understandable that each second battery in different second batteries corresponds to a third frequency, and the change trend of the third impedance data of different second batteries at the corresponding third frequency is the same, and all meet the set conditions. The set conditions may include but are not limited to: the impedance first decreases and then increases as the electrical signal characteristics increase.

[0103] For a second battery, the electronic device can determine the base frequency, and determine multiple candidate frequencies based on the base frequency and the set frequency step, and judge whether the third impedance parameter of each candidate frequency meets the set condition one by one, and determine the candidate frequency corresponding to the third impedance parameter that meets the set condition as the third frequency corresponding to the second battery. In one example, assuming that the recording circumference is 40s and the base frequency is 0.025Hz, it is judged whether the third impedance parameter corresponding to 0.025Hz meets the set condition. If it does, 0.025Hz is determined as the third frequency, and if not, it is judged whether the third impedance parameters of other candidate frequencies such as 0.05Hz, 0.075Hz, etc. meet the set condition until the third frequency whose third impedance parameter meets the set condition is found.

[0104] The electronic device determines the first frequency based on the third impedance data of each second battery at the different frequencies.

[0105] If the at least one second battery includes only one second battery, the third frequency of the second battery is the first frequency. In this case, the first frequency range can be considered to be the third frequency.

[0106] If the at least one second battery includes a plurality of second batteries, a first frequency range is determined based on a third frequency corresponding to each of the plurality of second batteries, and a frequency is selected from the first frequency range as the first frequency.

[0107] In some embodiments, the first frequency range may be a union of the third frequencies. In this case, the first frequency is the third frequency that appears most frequently in the first frequency range.

[0108] In some embodiments, the first frequency range may be a union of the third frequencies, and in this case, the first frequency is a frequency mean of the first frequency range.

[0109] In some embodiments, the first frequency range is a frequency range formed by the smallest third frequency to the largest third frequency among the third frequencies of at least one second battery, the first frequency is any frequency within the first frequency range, or the first frequency is the center frequency of the first frequency range.

[0110] In practical applications, there is a faulty battery in at least one of the second batteries, wherein the third impedance data corresponding to the faulty battery does not include third impedance data satisfying a set condition. In this case, when determining the first frequency, the faulty battery is excluded.

[0111] In some embodiments, S3021 determines the third impedance data corresponding to each frequency based on the charging data subset, including:

[0112] For the second charging data corresponding to each electrical signal feature in the electrical signal features with different values ​​in the charging data subset, fourth impedance data is determined based on the second charging data, and the fourth impedance data characterizes the change pattern of the impedance of the corresponding second battery under the second charging signal with frequency; based on the fourth impedance data corresponding to each electrical signal feature in the electrical signal features with different values, third impedance data corresponding to each frequency is determined.

[0113] For a subset of charging data, the electronic device determines the second charging data corresponding to each electrical signal feature in different electrical signal features, wherein the second charging data includes second voltage data and second current data, and for the second charging data corresponding to each electrical signal feature, the electronic device determines fourth impedance data based on the second charging data. Here, the electronic device performs time-frequency conversion on the second voltage data and the second current data respectively to obtain second voltage spectrum data and second current spectrum data, wherein the second voltage spectrum data represents the relationship between the voltage and frequency of the second battery when the second charging signal is input, and the second current spectrum data represents the relationship between the current and frequency of the second battery when the second charging signal is input, and the electronic device divides the voltage and current corresponding to the same frequency in the second voltage spectrum data and the second current frequency data to obtain the resistance corresponding to the corresponding frequency, thereby determining the impedance corresponding to each frequency within the frequency range involved in the second voltage spectrum data and the second current spectrum data, i.e., the fourth impedance data.

[0114] Based on the fourth data corresponding to each electrical signal feature in the electrical signal features with different values, the impedances corresponding to the different electrical signal features at the same frequency are determined, thereby determining the relationship between the impedance and the electrical signal feature at a frequency, namely the third impedance data.

[0115] Next, the charging control method provided in the embodiment of the present application is further described.

[0116] Fast charging often triggers side reactions in the battery. Taking lithium-ion batteries with graphite negative electrode systems as an example, the electrodes of the battery polarize during charging, and the polarization potential deviates from the equilibrium potential. The electrode potential, that is, the difference between the polarization potential and the equilibrium potential, is the overpotential. Among them, when the negative electrode overpotential is lower than 0V vs. Li / Li+, lithium metal will precipitate on the surface of the negative electrode, damaging the battery performance. In severe cases, it may also cause safety accidents such as thermal runaway. In addition, the faster the charging rate, the more obvious the voltage polarization, and the battery reaches the charging cut-off voltage faster, resulting in insufficient charged power. The remaining power needs to be charged through a constant voltage and low-rate current, which in turn prolongs the charging time.

[0117] In the related art, battery charging methods include:

[0118] Method 1: Constant current and constant voltage charging, that is, first use a constant current to charge the battery to the cut-off voltage, and then use a constant voltage to charge the battery to the cut-off current. This method is simple to operate but has low charging efficiency, which can easily cause negative electrode lithium deposition or battery overcharging, thus damaging the battery life.

[0119] Method 2: Multi-stage constant current charging, charging the battery after presetting the charging current and charging cut-off voltage of each stage. This method is complicated and cumbersome to set the charging parameters, and has poor universality for different batteries;

[0120] Method three, pulse charging, controls the charging process by adjusting the duration and amplitude of the pulse charging current to increase the charging rate, but the impact of pulses on battery life is still controversial.

[0121] Electrode potential is an important reference quantity in the battery charging process, and is directly related to the side reactions of the positive and negative electrodes of the battery. Taking lithium-ion batteries such as graphite negative electrode systems as an example, when the negative electrode overpotential is lower than 0V vs. Li / Li+, lithium deposition occurs on the negative electrode surface, seriously affecting charging safety and battery life. Whether lithium deposition occurs at the negative electrode can be determined by whether the negative electrode overpotential is lower than the critical potential for lithium deposition. By monitoring and controlling the negative electrode overpotential during charging, side reactions such as lithium deposition can be effectively avoided, and safe and fast charging of the battery can be achieved.

[0122] By measuring the difference between the positive and negative electrode potentials, the terminal voltage of the lithium-ion battery can be obtained, but the negative electrode potential inside the battery cannot be obtained; the commonly used electrochemical model of lithium-ion batteries can predict the internal potential, but the model is complex and the amount of calculation is large, making it difficult to apply to the battery management system (BMS); the commonly used equivalent circuit model parameters are simple and the amount of calculation is small, but it can only describe the external characteristics of the battery and cannot provide the negative electrode potential. It can be seen that in the relevant technology, there is no solution suitable for lithium-ion batteries that can detect whether the battery is lithium-ion in real time.

[0123] In view of the fact that the calculation of the negative electrode potential is very complicated, and it is difficult to calculate the negative electrode potential online in real time, and the short life of the reference electrode, it is very difficult to control the charging method based on the negative electrode potential. The embodiment of the present application provides a method for controlling the charging method based on the battery impedance calculation method, by calculating the impedance value of the battery at a specific frequency online and judging the trend of the impedance change to judge whether the battery is lithium precipitated, thereby controlling the battery charging method to prevent further lithium precipitation and achieve the purpose of protecting the battery life.

[0124] Taking a lithium-ion battery as an example, the charging control method provided in the embodiment of the present application is as follows: Figure 4 As shown, the following steps are included:

[0125] S401: Obtain a charging data set.

[0126] Select several newly manufactured battery samples, namely the second battery, and perform charging tests according to the factory charging method. For a battery sample, the electrical signal input to the battery sample can be called the second charging signal, which is the second power signal superimposed with a characteristic signal (i.e., a disturbance signal) under different electrical signal characteristics. The second charging signal charges the battery within a duration t, and simultaneously records the magnitude values ​​of the charging parameters such as voltage and current of the battery sample under different electrical signal characteristics, and obtains a charging data subset of the battery sample including the second charging data (including: current data and voltage data) under different electrical signal characteristics, and the charging data subsets of several battery samples constitute a charging data set. Among them, the superimposed characteristic signal can be a current disturbance signal of the power signal.

[0127] S402 : Determine a relationship between impedance and frequency based on a charging data set.

[0128] For an electrical signal feature of a battery sample in S401, the collected current data and voltage data are respectively converted into time-frequency data and the time-frequency conversion results are analyzed to obtain the relationship between impedance and frequency, i.e., the third impedance data: the impedance Z = [Z1, Z2, Z3, ... Zm] corresponding to the frequency sequence f = [f1, f2, f3, ... fm], wherein f1 corresponds to Z1, f2 corresponds to Z2, and so on.

[0129] S403: Based on the relationship between impedance and frequency, determine a second variation rule of impedance and electrical signal characteristics at a specific frequency.

[0130] Based on the relationship between impedance and frequency under different electrical signal characteristics, the change trend of the impedance value Z at a specific frequency (first frequency) along with the electrical signal characteristics is analyzed, and the corresponding change law, namely the second change law represented by the second impedance data, is obtained.

[0131] S404: Based on a first change rule of impedance and electrical signal characteristics of the battery at a specific frequency when a first charging signal is input.

[0132] During the actual charging process of the battery, the battery is charged by the first charging signal, and the second charging signal in step S401 is replaced by the first charging signal. Based on steps S401 to S403, the change law of the impedance and electrical signal characteristics at a specific frequency, that is, the first change law represented by the first impedance data, is determined.

[0133] S405: Control charging of the battery according to the first change rule and the second change rule.

[0134] Whether the battery has lithium deposition during charging is determined according to the first change rule and the second change rule, and the battery charging strategy is adjusted at the same time.

[0135] for Figure 4 S401 in the charging control method shown may have at least one of the following:

[0136] The number of battery samples is ≥ 2, preferably 3;

[0137] Electrical signal characteristics, including but not limited to current, voltage, open circuit voltage, positive electrode potential, negative electrode potential, charge, capacity, etc.;

[0138] The superimposed characteristic signal includes a square wave signal, a sine signal, and a triangular wave signal. If it is a sine signal, the preferred characteristic is that it is generated by superimposing sine waves of multiple frequencies, and its mean value is 0; it can also be a square wave signal, and the current step size △I≥500mA, that is, for example, using 1000mA to charge t / 2, and then using 500mA to charge t / 2;

[0139] The interval between characteristic signal occurrences is determined according to the characteristics of the electrical signal, such as once every 1% of the state of charge (SOC), once every 10mv of voltage, etc.

[0140] The duration of the characteristic signal and the current and voltage recording time are greater than or equal to twice the reciprocal of the specific frequency selected in S402, that is, t≥2 / fn, for example: t≥10 / fn;

[0141] The frequency fs of the collected battery current and voltage under the disturbance signal must be greater than or equal to twice the frequency of the specific frequency impedance selected in S402, that is, fs≥2fn, for example: fs≥10fn.

[0142] for Figure 4 S402 in the charging control method shown may have at least one of the following:

[0143] Time-frequency conversion analysis methods include wavelet transform or windowed Fourier transform for time-frequency analysis;

[0144] The specific frequency is preferably 0.001 Hz to 1000 Hz.

[0145] for Figure 4 In S403 of the charging control method shown, within the characteristic interval of the electrical signal, the impedance value Zn at a specific frequency changes in the following pattern: first decreases and then increases, or first increases and then decreases, etc.

[0146] for Figure 4 In S404 of the charging control method shown, the charging strategy is adjusted based on the judgment of the second change law in S404 and the second change law in S403. For example, when the impedance value Zn under the electrical signal characteristic continues to decrease and does not rise again, it is judged that lithium deposition occurs during charging of the battery, and the charging current needs to be lowered.

[0147] The charging control method provided in the embodiment of the present application can be applied to the following scenarios:

[0148] When the battery starts charging normally from 1% of its charge, a sinusoidal signal (as a disturbance signal) is superimposed on the charging current every 30 seconds and the voltage and current of the battery are recorded to obtain voltage data and current data. The amplitude of the superimposed sinusoidal signal is ±10mA and the frequency is 100Hz. The frequency fs of the recorded voltage and current is 50Hz, and the recording time t is 10s, thereby obtaining voltage data and current data corresponding to different charges. For each charge, the recorded current data and voltage data are converted to frequency using Fourier transform, and the impedance values ​​at different frequencies are calculated. Based on the calculated impedance values ​​of each charge at different frequencies, the impedance values ​​of each charge are obtained. Figure 5A The second change rule at 5Hz is shown in Figure 1: the impedance value decreases first and then increases as the battery power increases, and the impedance value reaches the minimum at 55% SOC. In the actual charging process, the impedance of the battery at 5Hz is continuously calculated. Figure 5B As shown, when the value continues to decrease without increasing as the amount of electricity increases, it is determined that lithium deposition has occurred during charging of the battery, and the charging current is reduced in the next charging process.

[0149] The charging control method provided in the embodiment of the present application can be applied to the following scenarios 1 and 2:

[0150] Scenario 1: If lithium deposition is found during the charging process, the charging current will be reduced after the lithium deposition is found. The current can be reduced as a whole or locally before or after the inflection point is expected to occur.

[0151] Scenario 2: If lithium deposition is found during this charging process, the charging current will be reduced during the next charging after this charging is completed. The current can be reduced as a whole or locally before or after the inflection point is expected to occur.

[0152] An electronic device according to an embodiment of the present application, such as Figure 6 As shown, the electronic device 600 includes:

[0153] A first acquisition unit 601 is configured to acquire first charging data corresponding to each electrical signal feature of electrical signal features with different values ​​when a first charging signal is input to the first battery;

[0154] A first determining unit 602 is configured to determine first impedance data based on the first charging data, where the first impedance data represents a change rule of the impedance of the first battery with the electrical signal characteristics when the first charging signal is input;

[0155] The control unit 603 is configured to control the charging strategy of the first battery according to the first impedance data and the second impedance data, wherein the second impedance data represents a change rule of the impedance of the battery with the electrical signal characteristics when no lithium is deposited.

[0156] In some embodiments, the first determining unit 602 is further configured to:

[0157] For each of the electrical signal features having different values, determining a target impedance corresponding to the first frequency based on the corresponding first charging data;

[0158] The first impedance data is constructed based on each electrical signal feature among the electrical signal features with different values ​​and the corresponding target impedance.

[0159] In some embodiments, the first determining unit 602 is further configured to:

[0160] Performing time-frequency conversion on first voltage data in the first charging data to obtain first voltage spectrum data, where the first voltage spectrum data represents a relationship between a voltage and a frequency of the first battery when the first charging signal is input;

[0161] Performing time-frequency conversion on first current data in the first charging data to obtain first current spectrum data, where the first current spectrum data represents a relationship between a current and a frequency of the first battery when the first charging signal is input;

[0162] A target impedance corresponding to the first frequency is determined based on a target voltage corresponding to the first frequency in the first voltage spectrum data and a target current corresponding to the first frequency in the first current frequency data.

[0163] In some embodiments, the first acquisition unit 601 is further configured to:

[0164] When the first battery inputs the first charging signal, for each of the electrical signal characteristics with different values, the value of at least one charging parameter is collected based on the second frequency within a first time period to obtain the first charging data, wherein the first time period and / or the second frequency are determined based on the first frequency.

[0165] In some embodiments, the control unit 603 is further configured to:

[0166] If the change pattern represented by the first impedance data does not match the change pattern represented by the second impedance data, the current magnitude of the first charging signal is reduced.

[0167] In some embodiments, the electronic device further comprises:

[0168] A second acquisition unit is configured to acquire a charging data set of at least one second battery, wherein the charging data set includes a charging data subset corresponding to each second battery in the at least one second battery, and the charging data subset is second charging data corresponding to each electrical signal feature in electrical signal features with different values ​​when the corresponding second battery is input with a second charging signal;

[0169] The second determination unit is configured to determine the second impedance data based on the charging data set.

[0170] In some embodiments, the second determining unit is further configured to:

[0171] For a charging data subset corresponding to each second battery in the charging data set, determining third impedance data corresponding to each frequency based on the charging data subset, wherein the third impedance data represents a change rule of the impedance of the corresponding second battery under the corresponding second charging signal along with the electrical signal characteristics;

[0172] For each second battery in the at least one second battery, determining a third frequency based on the third impedance data corresponding to each frequency, the third impedance data corresponding to the third frequency being the second impedance data;

[0173] A first frequency range is determined based on a third frequency corresponding to each second battery in the at least one second battery, and the first frequency is within the first frequency range.

[0174] In some embodiments, the second determining unit is further configured to:

[0175] For the second charging data corresponding to each electrical signal feature in the electrical signal features with different values ​​in the charging data subset, determining fourth impedance data based on the second charging data, wherein the fourth impedance data represents a change rule of the impedance of the corresponding second battery under the second charging signal as the frequency changes;

[0176] Based on the fourth impedance data corresponding to each electrical signal feature among the electrical signal features with different values, the third impedance data corresponding to each frequency is determined.

[0177] In practical applications, the above-mentioned first acquisition unit, first determination unit, control unit, second acquisition unit, second determination unit and other modules can be implemented by a processor located on the terminal device, specifically a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP) or a field programmable gate array (FPGA).

[0178] Those skilled in the art should understand that the relevant description of the above-mentioned terminal device in the embodiment of the present application can be understood by referring to the relevant description of the charging control method in the embodiment of the present application.

[0179] Figure 7 A schematic diagram of the structure of an electronic device optionally implemented as a terminal device is provided in an embodiment of the present application, such as Figure 8 As shown, an embodiment of the present application provides an electronic device 700, including an electronic chip 701, and the electronic chip can implement the charging control method as described in one or more of the above embodiments.

[0180] An embodiment of the present application provides an electronic device, Figure 8 A schematic diagram of the structure of another optional electronic device implemented as a terminal device provided in an embodiment of the present application, such as Figure 8 As shown, an embodiment of the present application provides an electronic device 800, including:

[0181] A processor 801 and a storage medium 802 storing executable instructions of the processor 801, wherein the storage medium 802 relies on the processor 801 to perform operations through a communication bus 803, and when the instructions are executed by the processor 801, the charging control method performed in one or more of the above embodiments is executed.

[0182] It should be noted that, in actual application, the various components in the terminal are coupled together via the communication bus 803. It is understandable that the communication bus 803 is used to realize the connection and communication between these components. In addition to the data bus, the communication bus 803 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 8 Various buses are labeled as communication buses 803.

[0183] An embodiment of the present application provides a computer storage medium, wherein the computer-readable storage medium is used to store a computer program, wherein the computer program enables a computer to execute the steps of the charging control method described in one or more of the above embodiments.

[0184] An embodiment of the present application provides a schematic structural diagram of an electronic device 900. Fig. 9 The electronic device 900 shown includes a processor 910. The processor 910 is configured to:

[0185] Acquire first charging data corresponding to each electrical signal feature among electrical signal features with different values ​​when the first battery is input with a first charging signal;

[0186] Determine first impedance data based on the first charging data, where the first impedance data represents a change rule of the impedance of the first battery following the characteristics of the electrical signal when the first charging signal is input;

[0187] The charging strategy of the first battery is controlled according to the first impedance data and the second impedance data, wherein the second impedance data characterizes a change rule of the impedance of the battery with the electrical signal characteristics when no lithium is deposited.

[0188] In the embodiment of the present application, the processor 910 can call and run a computer program from the memory to implement the charging control method in the embodiment of the present application.

[0189] Alternatively, if Fig. 9 As shown, the electronic device 900 may further include a memory 920. The processor 910 may call and run a computer program from the memory 920 to implement the charging control method in the embodiment of the present application.

[0190] The memory 920 may be a separate device independent of the processor 910 , or may be integrated into the processor 910 .

[0191] Alternatively, if Fig. 9 As shown, the electronic device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, specifically, to receive signals sent by other devices. Here, the transceiver may include at least two antennas.

[0192] It is understandable that the transceiver includes multiple physical paths for receiving or transmitting signals, and the physical elements on one or more physical paths for transmitting signals constitute a transmitter, wherein the MPR values ​​of each physical path in the transmitter are independent.

[0193] Understandable, Figures 7 to 9 The electronic device shown in any of the figures may also include a battery, which is used to provide power to the electronic device and can increase the electrical energy stored in the battery based on the input charging signal.

[0194] Optionally, the electronic device 900 can implement the corresponding processes implemented by the electronic device in each method of the embodiment of the present application, and for the sake of brevity, it will not be repeated here. It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Arra y, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to execute, or the hardware and software modules in the decoding processor are combined and executed. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0195] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0196] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct RAM bus random access memory (Direct RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0197] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0198] Optionally, the computer-readable storage medium can be applied to the terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0199] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0200] Optionally, the computer program can be applied to the terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0201] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0202] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0203] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0204] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0205] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0206] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0207] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A charging control method, It is characterized in that The method comprises: Acquire first charging data corresponding to each electrical signal feature among electrical signal features with different values ​​when the first battery is input with a first charging signal; Determine first impedance data based on the first charging data, where the first impedance data represents a change rule of the impedance of the first battery following the characteristics of the electrical signal when the first charging signal is input; The charging strategy of the first battery is controlled according to the first impedance data and the second impedance data, wherein the second impedance data characterizes a change rule of the impedance of the battery with the electrical signal characteristics when no lithium is deposited.

2. The method according to claim 1, It is characterized in that The determining first impedance data based on the first charging data includes: For each of the electrical signal features having different values, determining a target impedance corresponding to the first frequency based on the corresponding first charging data; The first impedance data is constructed based on each electrical signal feature among the electrical signal features with different values ​​and the corresponding target impedance.

3. The method according to claim 2, It is characterized in that The first charging data includes: first voltage data and first current data; and determining the target impedance corresponding to the first frequency based on the corresponding first charging data includes: Performing time-frequency conversion on the first voltage data to obtain first voltage spectrum data, where the first voltage spectrum data represents a relationship between a voltage and a frequency of the first battery when the first charging signal is input; Performing time-frequency conversion on the first current data to obtain first current spectrum data, where the first current spectrum data represents a relationship between a current and a frequency of the first battery when the first charging signal is input; A target impedance corresponding to the first frequency is determined based on a target voltage corresponding to the first frequency in the first voltage spectrum data and a target current corresponding to the first frequency in the first current frequency data.

4. The method according to claim 2, It is characterized in that The obtaining of first charging data corresponding to each electrical signal feature among electrical signal features with different values ​​when the first charging signal is input to the first battery includes: When the first battery inputs the first charging signal, for each of the electrical signal characteristics with different values, the value of at least one charging parameter is collected based on the second frequency within a first time period to obtain the first charging data, wherein the first time period and / or the second frequency are determined based on the first frequency.

5. The method according to claim 1, It is characterized in that The controlling the charging strategy of the first battery according to the first impedance data and the second impedance data includes: If the change pattern represented by the first impedance data does not match the change pattern represented by the second impedance data, the current magnitude of the first charging signal is reduced.

6. The method according to any one of claims 1 to 5, It is characterized in that The method further comprises: Acquire a charging data set of at least one second battery, the charging data set comprising a charging data subset corresponding to each second battery in the at least one second battery, the charging data subset being second charging data corresponding to each electrical signal feature in electrical signal features with different values ​​when the corresponding second battery is input with a second charging signal; Based on the set of charging data, the second impedance data is determined.

7. The method of claim 6, determining the second impedance data based on the charging data set, include: For a charging data subset corresponding to each second battery in the charging data set, determining third impedance data corresponding to each frequency based on the charging data subset, wherein the third impedance data represents a change rule of the impedance of the corresponding second battery under the corresponding second charging signal along with the electrical signal characteristics; For each second battery in the at least one second battery, determining a third frequency based on the third impedance data corresponding to each frequency, the third impedance data corresponding to the third frequency being the second impedance data; A first frequency range is determined based on a third frequency corresponding to each second battery in the at least one second battery, and the first frequency is within the first frequency range.

8. The method according to claim 7, It is characterized in that The determining, based on the charging data subset, third impedance data corresponding to each frequency includes: For second charging data corresponding to each electrical signal feature in the electrical signal features with different values ​​in the charging data subset, determining fourth impedance data based on the second charging data, wherein the fourth impedance data represents a change rule of the impedance of the corresponding second battery under the second charging signal as the frequency changes; Based on the fourth impedance data corresponding to each electrical signal feature among the electrical signal features with different values, the third impedance data corresponding to each frequency is determined.

9. An electronic device, It is characterized in that The electronic device comprises: A first acquisition unit is configured to acquire first charging data corresponding to each electrical signal feature of electrical signal features with different values ​​when the first charging signal is input to the first battery; A first determining unit is configured to determine first impedance data based on the first charging data, where the first impedance data represents a change rule of the impedance of the first battery following the characteristics of the electrical signal when the first charging signal is input; The control unit is configured to control the charging strategy of the first battery according to the first impedance data and the second impedance data, wherein the second impedance data represents a change rule of the impedance of the battery with the characteristics of the electrical signal when no lithium is deposited.

10. An electronic device comprising a first battery and a processor, It is characterized in that The processor is configured to: Acquire first charging data corresponding to each electrical signal feature among electrical signal features with different values ​​when the first battery is input with a first charging signal; Determine first impedance data based on the first charging data, where the first impedance data represents a change rule of the impedance of the first battery following the characteristics of the electrical signal when the first charging signal is input; The charging strategy of the first battery is controlled according to the first impedance data and the second impedance data, wherein the second impedance data characterizes a change rule of the impedance of the battery with the electrical signal characteristics when no lithium is deposited.

11. An electronic device comprising a first battery, a memory, a processor, and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the computer program, the steps in the charging control method according to any one of claims 1 to 8 are implemented.

12. A storage medium storing an executable program, It is characterized in that When the executable program is executed by a processor, the charging control method according to any one of claims 1 to 8 is implemented.

13. A chip comprising a processor, It is characterized in that The processor is configured to execute the charging control method according to any one of claims 1 to 8.

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