Charging method and electronic device

Abstract

Embodiments of the present application disclose a charging method and an electronic device, including: in the case of charging a battery, if the electronic device is in the last constant voltage charging stage, obtaining a first battery current and a first battery parameter; the first battery current and the first battery parameter are used to determine whether to end the charging; in the case that the first battery current is greater than a threshold current and the first battery parameter meets a preset condition, the electronic device ends the charging. Embodiments of the present application can improve the accuracy of power reporting, the timeliness of ending battery charging, and the user experience.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to a charging method and an electronic device. Background Technology

[0002] Lithium-ion batteries can consist of a positive electrode, a negative electrode, an electrolyte, and a separator. The separator is a specially shaped polymer film with a microporous structure that allows lithium ions to pass freely while blocking electrons; an example is the SEI (Sediment Ion) membrane. Improvements in the performance of the battery's negative electrode are often highly correlated with the stability of its SEI membrane. However, during battery charging, the formation of metal ions and / or elemental substances in the electrolyte can prevent the battery current from reaching below the threshold current for extended periods, resulting in the battery failing to register full charge and failing to stop charging, leading to a poor charging experience for the user. Summary of the Invention

[0003] This application discloses a charging method and electronic device, which can improve the accuracy of reporting a full charge, the timeliness of ending battery charging, and improve user experience.

[0004] In a first aspect, this application provides a charging method applied to an electronic device, comprising: when the electronic device is charging a battery, if it is in the last constant voltage charging stage, acquiring a first battery current and a first battery parameter; the first battery current and the first battery parameter are used to determine whether to end charging; and when the first battery current is greater than a threshold current and the first battery parameter meets a preset condition, the electronic device ends charging.

[0005] In this embodiment, when the battery is abnormal (fully charged, but Co ions form shuttle pairs between the positive and negative electrodes), the current cannot be determined to cut off the charge. Therefore, the first battery parameter is obtained for further judgment. Based on the first battery parameter, it can be determined whether the electronic device can cut off the charge, thus ending the charging process. By adding the first battery parameter as a judgment condition, the problem of not being able to end charging in time when the battery is fully charged can be solved, improving the accuracy of charging cut-off, avoiding power waste, and improving user experience. Furthermore, some batteries in a factory-made electronic device may be normal, allowing accurate determination of charging cut-off based on current magnitude. Other batteries may be abnormal at the time of manufacture, making current an inaccurate judgment condition. Therefore, the first battery parameter can be added to determine whether to cut off the charge. By using both the battery current and the first battery parameter, it can be ensured that all batteries can accurately cut off the charge. In addition, the judgment of the first battery parameter generally aims to ensure the battery is fully charged before cutting off the charge (e.g., the threshold cut-off time is slightly longer than the average time for a full charge). Therefore, electronic devices often experience slight overcharging, which is harmful to the battery in the long run. However, this process often requires accurate current measurement. Determining the normal charging cutoff current is usually the most accurate method. Therefore, retaining the current measurement to determine whether charging should stop can improve the accuracy of the charging termination timing, thus extending battery life.

[0006] In one possible implementation, the method further includes: when the first battery current is less than or equal to the threshold current, the electronic device ends charging. Thus, by determining charging termination based on the battery current, the battery at this point is often one that can normally stop charging via CV (current capacitance), allowing for accurate charging termination, reducing ineffective charging time, saving energy, and improving the user's charging experience.

[0007] In one possible implementation, the method further includes: when the first battery parameter meets the preset condition, the electronic device ends charging. In this way, even before the battery current is obtained, the charging can be stopped based on the first battery parameter, eliminating the need to wait for the battery current parameter to be determined. This ensures the flexibility and timeliness of charging termination, allows for accurate charging termination, reduces ineffective charging time, saves energy, and improves the user's charging experience.

[0008] In one possible implementation, the first battery parameter includes one or more of charging time, battery temperature, and charging capacity; the charging time is the length of time the electronic device takes to enter the last constant-voltage charging stage; the battery temperature includes the initial battery temperature and the current battery temperature when the electronic device enters the last constant-voltage charging stage; and the charging capacity is the charging capacity of the battery. Thus, using one or more of time, temperature, and capacity as the first battery parameter can effectively end the charging process by determining when to stop charging, distinguishing between current and charging methods to ensure proper charging, reducing the time spent on ineffective charging, saving energy, and improving the user's charging experience.

[0009] In one possible implementation, the first battery parameter satisfies a preset condition if at least one parameter among all parameters included in the first battery parameter satisfies a corresponding threshold condition. If the first battery parameter includes the charging time, and the charging time is greater than or equal to a threshold charging duration, the electronic device determines that the first battery parameter satisfies the preset condition. If the first battery parameter includes the battery temperature, and the temperature rise during the last constant-voltage charging phase is greater than or equal to a threshold temperature difference, the electronic device determines that the first battery parameter satisfies the preset condition. If the first battery parameter includes the charging capacity, and the charging capacity is greater than or equal to a threshold charging capacity, the electronic device determines that the first battery parameter satisfies the preset condition. Thus, using one or more of time, temperature, and capacity as the first battery parameter effectively terminates the charging process, distinguishes between current and charging termination, reduces ineffective charging time, saves energy, and improves the user's charging experience.

[0010] In one possible implementation, the method further includes: if the first battery current is greater than the threshold current and the first battery parameters do not meet the preset conditions, the electronic device continues charging and re-executes the steps of acquiring the first battery current and the first battery parameters. This ensures the accuracy of determining when to stop charging, thus improving the user's charging experience, by continuing charging before it is stopped.

[0011] In one possible implementation, the electronic device terminates charging, and the method further includes: the electronic device determining whether a switching condition is met; if the switching condition is met, when the electronic device is charging the battery, if it is in the last constant-voltage charging stage, acquiring the battery current and a first battery parameter to determine whether to terminate charging; if the switching condition is not met, when the electronic device is charging the battery, if it is in the last constant-voltage charging stage, determining whether to terminate charging based on the battery current. Thus, after a long charging process, when the number of shuttle pairs formed by Co ions decreases to a certain extent, the number of shuttle pairs cannot affect the result of determining whether charging is stopped based on the battery current being less than a threshold current. At this time, the electronic device's determination of charging stoppage based on battery current is accurate. In the early stages of battery use, a first charging stoppage strategy can be used to ensure that the battery can report full and stop charging in a timely manner. When Co ions do not affect the current-based stopping decision, a second charging stoppage strategy can be switched to, and this strategy is maintained thereafter. This reduces the acquisition and judgment process of the first battery parameter, ensuring switching accuracy while reducing processing steps, improving processing efficiency, and saving energy and processing resources.

[0012] In one possible implementation, when the electronic device is charging the battery, if it is in the final constant-voltage charging phase, it determines whether to end charging based on the battery current. This includes: when charging the battery, if it is in the final constant-voltage charging phase, the electronic device acquires the battery current; if the battery current is less than or equal to a threshold current, the electronic device ends charging; if the battery current is greater than the threshold current, the electronic device continues charging. In this way, switching to the second charging cutoff strategy and maintaining the second charging cutoff strategy thereafter reduces the acquisition and judgment process of the first battery parameters, ensuring switching accuracy while reducing processing steps, improving processing efficiency, and saving power and processing resources.

[0013] In one possible implementation, the switching condition is K consecutive times the battery current is less than or equal to a threshold current, indicating that charging has ended. Here, K is an integer greater than 2. This allows batteries that cannot promptly report full charge termination with sufficient current to gradually transition to batteries that normally stop charging based on current as usage time increases. The above process accurately determines whether the current battery has become a normally terminated battery based on the K consecutive charging termination conditions, allowing switching to a current-only charging termination strategy. This ensures switching accuracy while reducing processing steps, improving processing efficiency, and saving energy and processing resources.

[0014] Secondly, this application provides an electronic device, including: a battery, one or more processors, and one or more memories; the one or more processors are coupled to the one or more memories, the one or more memories being used to store computer program code, the computer program code including computer instructions, which, when the one or more processors execute the computer instructions, cause the electronic device to perform:

[0015] Thirdly, embodiments of this application provide a chip system applied to an electronic device. The chip system includes one or more processors, which are used to invoke computer instructions to cause the electronic device to execute the charging method in any possible implementation of the first aspect described above.

[0016] Fourthly, this application provides an electronic device comprising: one or more functional modules. The one or more functional modules are configured to perform the charging method in any possible implementation of the first aspect described above.

[0017] Fifthly, embodiments of this application provide a computer storage medium including computer instructions that, when executed on an electronic device, cause a communication device to perform the charging method in any possible implementation of the first aspect described above.

[0018] Sixthly, embodiments of this application provide a computer program product that, when run on a computer, causes the computer to execute the charging method in any possible implementation of the first aspect described above. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of current and voltage changes during a CC-CV charging process provided in an embodiment of this application;

[0020] Figures 2A to 2C This is a schematic diagram illustrating the volume expansion of silicon during lithium insertion and delithiation processes, provided in an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the redox process of cobalt ions in the cathode and anode of a battery, provided in an embodiment of this application.

[0022] Figures 4A to 4D This is a schematic diagram comparing charging parameters for normal charging reporting of full charge and abnormal charging failing to report full charge, provided in an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of a charging method provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of a charging method provided in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of another charging method provided in an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of another charging method provided in the embodiments of this application;

[0027] Figure 9 This is a schematic diagram of another charging method provided in the embodiments of this application;

[0028] Figure 10 This is a schematic diagram of another charging method provided in the embodiments of this application;

[0029] Figure 11 This is a schematic diagram of another charging method provided in the embodiments of this application;

[0030] Figure 12 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; the word "and / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0032] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0033] CC-CV charging mode:

[0034] CC is the constant current mode of the power supply. When the resistance of the load changes, the output current of the power supply remains at the set value and remains constant, while the output voltage of the power supply changes according to the load. CV is the constant voltage mode of the power supply. When the resistance of the load changes, the output voltage of the power supply remains at the set value and remains constant, while the output current of the power supply changes according to the load.

[0035] In CC-CV charging mode, during the CC phase, a fixed current value corresponds to a maximum voltage. When the voltage rises to the maximum voltage value, the system enters the CV phase. During the CV phase, a fixed voltage value corresponds to a preset current value. When the voltage drops to the preset current value, the system enters the CC phase.

[0036] During the CC-CV charging phase, a constant current is applied to the battery to achieve a faster charging speed. The battery voltage continuously increases, eventually reaching a preset maximum voltage. When the voltage reaches this maximum, the charging mode switches from CC to CV, entering the CV charging phase. The voltage remains constant while the current decreases (generally exponentially), gradually reducing the polarization voltage. When the charging current decreases to a preset value, the charging phase resumes. In this CC-CV charging mode, the current continuously decreases (it will not drop to zero until the battery is fully charged), and the voltage continuously increases until the battery is fully charged. In the CC-CV charging strategy, the electronic device can be configured with multiple voltage and current thresholds for switching between CC and CV. For example, the current and voltage thresholds could be: 4.0C-4.1V, 3.0C-4.2V, 2.5C-4.3V, 2.0C-4.4V, 1.6C-4.5V, 1.5C-4.55V, and 1.0C-4.6V. The charging process begins in the CC (Concurrent Compression) phase, maintaining a current of 4.0C. When the voltage rises to a critical value of 4.1V, it switches to the CV (Concurrent Compression) phase to continue charging. In the CV phase, when the current decreases from 4.0C to a critical value of 3.0C, it switches back to the CC phase. In the CC phase, when the voltage rises from 4.1V to a critical value of 4.2V, it switches back to the CV phase. In the CV phase, when the current decreases from 3.0C to a critical value of 2.0C, it switches back to the CC phase. In the CC phase, when the voltage rises from 4.2V to a critical value of 4.3V, it switches back to the CV phase. After several switches, the final phase is the CV phase, where the voltage is maintained at 4.6V and the current continues to decrease. It should be noted that the critical values ​​for switching between the CC and CV charging phases described above are merely illustrative and are not limiting in this application.

[0037] like Figure 1 The diagram shows the current and voltage changes during a CC-CV charging process. Figure 1As shown, the CC-CV strategy charging process includes two stages: a constant current / constant voltage stepped fast charging stage and a Buck CV constant voltage charging stage. In the constant current / constant voltage stepped fast charging stage, charging begins in the first CC stage, where the current remains constant and the voltage gradually increases. Then, it enters the first CV stage, where the voltage remains constant and the current decreases. This is followed by the second CC stage, where the current remains constant and the voltage gradually increases, before switching back to the second CV stage… This process of alternating CC and CV is repeated multiple times. In the constant current / constant voltage stepped fast charging stage, during the alternation of CC and CV, the voltage increases and the current decreases. When the voltage rises to the preset CV charging voltage and the current drops to a certain level, charging can be stopped for one minute for depolarization. Then, the Buck CV constant voltage charging stage begins. In the Buck CV constant voltage charging stage, the current can continue to decrease while the voltage remains constant. When the current decreases to a certain threshold, the electronic device can determine that the battery is fully charged and stop charging.

[0038] Electronic devices are trending towards thinner and smaller designs, leading to increasing demands for longer battery life. This necessitates higher requirements for both mass energy density and volumetric energy density in batteries. With the growing demand for high-energy-density lithium-ion batteries, the theoretical specific capacity of silicon anodes (4200 mAh·g⁻¹) is approximately ten times that of commercial graphite anodes (372 mAh·g⁻¹). Traditional graphite anode systems are no longer sufficient to meet the needs of next-generation high-energy-density lithium-ion batteries. Silicon (Si) is an ideal anode material.

[0039] During cycling, silicon (Si) undergoes significant volume expansion (>300%) due to lithium ion (Li+) insertion, followed by volume contraction as Li+ is extracted. This volume variation repeats with increasing cycle count. This volume change not only leads to repeated cracking and breakage of Si but also causes Si to disintegrate, fracture, and electrically isolate from the electrode. Continuous fragmentation further damages and thickens the solid electrolyte interphase (SEI) layer, rapidly consuming the electrolyte and Li+, resulting in low coulombic efficiency (CE), rapid capacity decay, and a sharp decline in stability in the silicon anode. Furthermore, the low intrinsic electronic conductivity of Si is also a significant factor limiting the commercial application of silicon anodes.

[0040] The following explains the battery volume change of Si during the cycling process in a stepped fast charging configuration for lithium-ion batteries used in electronic devices:

[0041] Figures 2A to 2C This is a schematic diagram illustrating the volume expansion of silicon during lithium insertion and delithiation processes, as disclosed by an exemplary embodiment of this application.

[0042] The volume expansion / contraction of silicon during lithium insertion and delithiation can lead to negative electrode stress and electrical contact problems, affecting electrode performance.

[0043] First, the Si particles are broken down and pulverized. For example... Figure 2A As shown, the lithiation and delithiation processes are accompanied by huge volume changes, which can lead to particle breakage after multiple cycles; silicon particles cannot withstand the huge stress caused by volume deformation during repeated lithium insertion and extraction processes, resulting in their own particle breakage.

[0044] Second, the Si particles detach from the film and lose their electrical contact. For example... Figure 2B As shown, with increasing cycle count, silicon volume changes lead to increased gaps between Si particles, causing the active material to separate from the conductive agent and binder, resulting in loss of electrical contact and a decrease in capacity. Volume changes cause structural collapse and peeling off of electrode active material, leading to loss of electrical contact between silicon particles and between particles and the current collector, and even the active material detaching from the current collector.

[0045] Third, the continuous damage and repair of the SEI membrane. For example... Figure 2C As shown, Si is the active material that is in direct contact with the electrolyte. Due to the thermodynamic instability of the electrolyte, a solid electrolyte membrane (SEI membrane) will be formed. An excessively thick SEI layer will consume the electrolyte and hinder ion transport, affecting the cycle stability and rate performance of the battery. That is, the volume effect causes the SEI membrane on the silicon surface to be repeatedly destroyed and formed, continuously consuming the electrolyte and Li+, while the SEI membrane continues to thicken.

[0046] Of course, it's not only lithium batteries with Si anodes that suffer damage to the SEI film on the anode surface during long-term cycling. For example, graphite-Si hybrid anodes or graphite anode batteries also experience varying degrees of damage during long-term cycling.

[0047] In the SEI mode, the electrolyte interface film is fixed. The first cycle of a lithium battery is due to the reaction between the electrolyte and the negative electrode material at the solid-liquid interphase layer, thus forming an SEI film. The SEI film protects the negative electrode material, preventing its structural collapse and increasing the cycle life of the electrode material. During the formation of the SEI film, some lithium ions are consumed; the negative electrode reaction is a process of lithium ion insertion and extraction within a carbon interlayer structure. The negative electrode SEI film is the result of insoluble products obtained from the reduction and decomposition of the organic solvent in the electrolyte adhering to the electrode surface.

[0048] Adding FEC to the electrolyte can generate a LiF-rich SEI film on the negative electrode surface, significantly improving the cycle stability of Si-containing negative electrodes. However, electrolytes containing FEC often become unstable at high temperatures. Under high-temperature conditions, FEC readily undergoes a desulfurization reaction with Lewis acids (such as PF5) in the electrolyte, producing HF and various other acids (such as H3OPF6, HPO2F2, H2PO3F, and H3PO4), which in turn causes solvent degradation of the transition metal elements in the positive electrode and a decrease in battery capacity. This exposes the fresh positive electrode surface, exacerbating the dissolution of transition metal elements and leading to an increase in the Co ion content in the electrolyte.

[0049] Figure 3 This is a schematic diagram illustrating an exemplary redox process of cobalt ions at the cathode and anode of a battery, as disclosed in an embodiment of this application. During charging, as... Figure 3 As shown, trace amounts of Co2+ in the electrolyte lose electrons at the cathode (positive electrode) surface under high temperature or high voltage and are oxidized to Co3+ / Co4+; Co3+ / Co4+ gain electrons at the anode (negative electrode) surface and are reduced to Co2+ and Co elemental substance, and Co ions form a shuttle couple (forming an electric current) between the positive and negative electrodes.

[0050] In the battery charging process of electronic devices, a CC-CV charging strategy is used. During the final charging stage when the battery is nearly fully charged, it enters the CV constant-voltage charging stage, where the current continuously decreases. When the electronic device determines that the battery current is below a certain current threshold, it can confirm that the battery is fully charged and end charging. However, due to the formation of shuttle pairs between the positive and negative electrodes by Co ions, the current decreases to a certain level and cannot continue to decrease. Because of the presence of these shuttle pairs, the current decreases slowly and fails to reach the set charging cutoff threshold current for an extended period. Therefore, the condition for the electronic device to determine whether to end charging based on current is never met; that is, the charging current cannot decrease to the threshold current, and charging cannot be stopped. The judgment of whether the current is below a certain threshold during the CV constant-voltage charging stage becomes ineffective. Consequently, in the early stages of charging electronic devices, an abnormal phenomenon occurs where charging takes a long time and the device fails to report full charge, resulting in a poor user charging experience.

[0051] As trace amounts of elemental Co continuously deposit at the anode during the cycle, the Co ion concentration in the electrolyte decreases. When the amount of elemental Co deposited reaches a certain level, the number of shuttle pairs formed by Co ions also decreases. After a long charging process, when the number of shuttle pairs formed by Co ions decreases to a certain extent, the number of shuttle pairs no longer affects the result of determining whether charging should be stopped based on the battery current being below the threshold current. At this point, the electronic device's determination of charging stoppage based on battery current is accurate, and there are no abnormal situations where it fails to report full charge or fails to stop charging.

[0052] Figures 4A to 4DThis is an exemplary schematic diagram of charging parameter comparison between normal charging reporting of full charge and abnormal charging failing to report full charge, as disclosed in an embodiment of this application. The electronic device uses a CC-CV charging strategy. In the case of normal charging reporting of full charge, the battery level stops at full charge in the last CV stage, and the battery reports full normally. In the case of abnormal charging failing to report full charge, the battery level is full in the last CV stage, but charging does not stop, and the battery reports full abnormally.

[0053] Figure 4A This explains the changes in charging current when normal charging reports full charge and abnormal charging fails to report full charge. For example... Figure 4A As shown, the charging current decreases as the charging time increases. During the CV (Conversion Cycle) phase, the battery current (solid line) in a normally closed CV phase can quickly drop below the threshold current, accurately cutting off the charging process, and the charging end time is normal. However, the current (dashed line) in electronic devices with abnormal CV cutoff decreases more slowly than in cases of normal CV cutoff. After dropping to a certain value, the current decreases very slowly, failing to reach the threshold current to stop charging for a long time. Because of the presence of Co ions in the battery, which form electron pairs, the current cannot decrease quickly, leading to the abnormal phenomenon of not reporting full charge and charging cutoff.

[0054] Figure 4B This describes the charging voltage changes that occur when normal charging reports full charge and when abnormal charging fails to report full charge. For example... Figure 4B As shown, the charging voltage increases with increasing charging time. When the battery is fully charged, a battery with normal CV cutoff will stop charging when it reports full charge, and the voltage curve ends (solid line). When the battery is fully charged, a battery with abnormal CV cutoff will not report full charge and will continue charging, meaning it will not stop charging, and the voltage curve will not end (dashed line).

[0055] Figure 4C This explains the changes in charging capacity when normal charging reports full and abnormal charging fails to report full. For example... Figure 4C As shown, the charging capacity increases rapidly with increasing charging time. When the charging capacity reaches approximately 5Ah to 6Ah, the battery with normal CV cutoff can stop charging, and the charging capacity curve ends (solid line). In the abnormal charging situation where CV does not cut off when fully charged, the battery does not report full charge and cannot cut off charging, continuing to increase the charging capacity, and the charging capacity curve does not end (dashed line).

[0056] Figure 4D This describes the battery temperature changes when the battery reports full charge under normal conditions and fails to report full charge under abnormal conditions. For example... Figure 4DAs shown, with increasing charging time, the battery temperature rapidly increases from around 24 degrees Celsius to around 26 degrees Celsius. After approximately 60 minutes of charging, the CV (Continuous Voltage Regulator) cuts off from the normal charging device, the battery reports full charge, charging stops, and the battery temperature begins to decrease, remaining at around 24 degrees Celsius (solid line). However, if the CV does not cut off from the abnormal charging device, the battery cannot report full charge, and charging cannot stop. The battery temperature continues to rise from 26 degrees Celsius, reaching around 27 degrees Celsius (dashed line).

[0057] The above Figures 4A to 4D The information showing the changes in various parameters during the charging process indicates that, due to the formation of shuttle pairs between the positive and negative electrodes by Co ions, the battery cannot be fully charged in the CC-CV charging strategy, and charging cannot be stopped. This abnormal phenomenon of prolonged charging without full charge during the early charging process of a user's lithium-ion battery negatively impacts the user experience and increases the rate of product failure feedback in the market.

[0058] Combination Figures 3-4D To address the problem of battery power not being reported as full in time and charging being stopped, this application proposes a charging method and terminal device. In this charging method, when an electronic device is charging a battery, if the charging stage is in the last constant-voltage charging stage, it acquires the battery current and first battery parameters. If the battery current is acquired, it determines whether the battery current is less than or equal to a threshold current. If the battery current is less than or equal to the threshold current, the electronic device ends charging. If the battery current is greater than the threshold current, the electronic device determines whether the first battery parameters meet preset conditions. If the first battery parameters meet the preset conditions, the electronic device ends charging; if the first battery parameters do not meet the preset conditions, the electronic device continues charging and re-executes the steps of acquiring the battery current and first battery parameters. The first battery parameters are one or more of charging time, battery temperature, and charging capacity. Charging time is the length of time the electronic device spends in the last constant-voltage charging stage; battery temperature includes the initial battery temperature and the current battery temperature in the last constant-voltage charging stage; charging capacity is the battery's charging capacity. The first battery parameters meeting the preset conditions means that at least one of the parameters included in the first battery parameters meets the preset conditions.

[0059] In this embodiment, the electronic device uses not only current as the condition for stopping charging but also a first battery parameter as a condition for determining whether charging has stopped. When the electronic device enters the final CV charging stage, if the battery is fully charged, the current is used to determine whether charging has stopped. If the battery is normal (fully charged), charging can be stopped immediately. If the battery is abnormal (fully charged, but Co ions form shuttle pairs between the positive and negative electrodes), the current cannot determine whether charging has stopped, and the first battery parameter is obtained for further judgment. Based on the first battery parameter condition, it can be determined whether the electronic device can stop charging, thus ending the charging process. By adding the first battery parameter as a condition for stopping charging, the problem of not being able to stop charging in time when the battery is fully charged is solved, improving the accuracy of charging stoppage, avoiding power waste, and improving the user experience.

[0060] The following details the several charging methods proposed in this application.

[0061] Figure 5 This application provides a schematic flowchart of a charging method. For example... Figure 5 As shown, each module can be referenced from the above. Figures 2A to 3 The relevant description is omitted. This charging method may include, but is not limited to, the following steps:

[0062] Figure 5 The charging strategy used is a CC-CV charging strategy (the charging process corresponding to the CC-CV charging strategy can be referred to the description above, and will not be repeated here). When the electronic device is charging, in the CC phase, the current remains constant while the voltage increases; in the CV phase, the voltage remains constant while the current decreases. Initially, in the CC phase, the voltage continuously increases. After several alternations between the CC and CV phases, the voltage increases while the current decreases, and the charging speed increases. The final stage of charging is the target CV constant voltage charging stage (the last constant voltage charging stage of this charging process, i.e....). Figure 1 In the Buck CV constant voltage charging phase, the electronic device is at a fixed target voltage and the current gradually decreases.

[0063] S501: When the electronic device enters the target CV constant voltage charging stage, acquire the battery current and the first battery parameters.

[0064] The first battery parameter includes one or more of the following: charging capacity, battery temperature, and charging time.

[0065] When an electronic device is connected to an external power source (such as a charger), it uses a CC-CV charging strategy to charge the battery. Therefore, during the charging process, the electronic device can determine the current charging stage, such as the CC charging stage and the CV charging stage. In the CC-CV charging strategy, the electronic device can determine when the charging voltage reaches a certain voltage threshold and then proceed to the target CV constant-voltage charging stage, i.e., the voltage of the final CV stage. For example, referring to the above example of "current threshold and voltage threshold," if the electronic device performs the CV stage when the charging voltage reaches 4.6V, it can enter the target CV constant-voltage charging stage.

[0066] Once the electronic device determines that it is currently in the target CV stage, it can acquire the battery current and the first battery parameters.

[0067] For example, an electronic device may include a fuel gauge, which can be a fuel gauge built into a charger IC or an external fuel gauge on a battery protection board. The electronic device can measure the battery current using the fuel gauge.

[0068] For example, the electronic device may include registers, which can be registers of a charger IC or registers of an application-specific signal processor (ADSP). From the moment the target constant voltage (CV) charging phase begins, the electronic device starts timing to obtain the charging time; the electronic device can read the battery level using a fuel gauge. The electronic device may include a temperature sensor to acquire the battery temperature. Upon entering the target CV charging phase, the electronic device can acquire and store the initial battery temperature, and subsequently acquire the current battery temperature. The electronic device can measure the charging capacity using a fuel gauge.

[0069] When the electronic device receives the battery current, it can begin executing S502; when the electronic device receives the first battery parameters, it can begin executing S503.

[0070] Optionally, when the electronic device determines that it is currently in the target CV stage, it can periodically acquire the battery current and the first battery parameter. The electronic device can acquire the battery current according to a first sampling period. S502 is executed each time the battery current is acquired. The electronic device can acquire the first battery parameter according to a second sampling period, and after acquiring the first charging parameter, S503 is executed. The first and second sampling periods can be the same or different. The second sampling period can include multiple sampling period types, and different sampling periods can be the same or different; this application is not limited to this. When periodically acquiring the battery current and the first battery parameter, the electronic device may not execute S505; if the condition is not met in S503, the electronic device can simply continue charging.

[0071] Optionally, when entering CV constant voltage charging, the power management chip (PMIC) of the electronic device detects that the battery charging has reached a certain cutoff current and stops for 1 minute to allow the battery to polarize. This can increase the battery voltage and speed up the battery charging process.

[0072] S502: The electronic device determines whether the battery current is less than (less than or equal to) a threshold current. If the battery current is less than (less than or equal to) the threshold current, S504 is executed, i.e., charging is stopped; if the battery current is greater than or equal to (greater than) the threshold current, S503 is executed.

[0073] When the electronic device receives the battery current, it can determine whether the battery current is less than (less than or equal to) a threshold current. If the battery current is less than (less than or equal to) the threshold current, S504 is executed, i.e., charging is stopped. If the battery current is greater than or equal to (greater than) the threshold current, S503 is executed.

[0074] Electronic devices are equipped with a threshold current 'a'. Activation through regular charge-discharge cycles at room temperature eliminates the impact of capacity fluctuations. The conventional stepped charging regime (CC-CV) and overvoltage charging regime are tested at room temperature (e.g., 25 degrees Celsius). The final CV cutoff current of the conventional stepped charging regime is an empirical threshold current, for example, 0.025C. The method for determining the final CV cutoff current value I (threshold current) of the overvoltage charging regime is as follows: using 99% of the battery capacity at normal CV cutoff as the baseline capacity, the cutoff current 'a' is taken when the battery capacity reaches the baseline capacitance during the final overvoltage constant voltage process of the overvoltage charging regime. For example, the average cutoff current of 10 cells is used as the cutoff current value 'a' for the electronic device's battery CV constant voltage charging.

[0075] S503: The electronic device determines whether the parameters of the first battery meet the preset conditions. If the parameters of the first battery meet the preset conditions, proceed to S504; if the parameters of the first battery do not meet the preset conditions, continue to proceed to S505.

[0076] When the first battery parameter includes multiple parameters, the electronic device needs to determine whether each battery parameter meets the corresponding threshold condition. If at least one battery parameter meets the threshold condition, it can be determined that the first battery parameter meets the preset condition; if none of the battery parameters meet the threshold condition, it can be determined that the first battery parameter does not meet the preset condition. In other words, the first battery parameter meets the preset condition if at least one parameter meets the corresponding threshold parameter. The first battery parameter does not meet the preset condition if all of the first battery parameters do not meet the corresponding threshold parameter.

[0077] The types of the first battery parameters correspond to the threshold parameters. The following explains the determination process for each type of parameter in the first battery and its corresponding threshold parameter:

[0078] 1. Condition where the first battery parameter includes charging capacity: When the first battery parameter includes charging capacity, the first threshold parameter includes threshold charging capacity. Determine whether the charging capacity is greater than (greater than or equal to) the threshold charging capacity. If the charging capacity is greater than (greater than or equal to) the threshold charging capacity, determine that the first battery parameter meets the preset condition, and execute S504.

[0079] 2. Condition where the first battery parameter includes battery temperature: When the first battery parameter includes battery temperature, the first threshold parameter includes the threshold temperature difference. It is determined whether the battery temperature rise is greater than (greater than or equal to) the threshold temperature difference. If the battery temperature rise is greater than (greater than or equal to) the threshold temperature difference, the first battery parameter is determined to meet the preset condition, and S504 is executed. The battery temperature rise is the difference between the current battery temperature in the target CV constant voltage charging stage and the initial battery temperature. The initial battery temperature refers to the starting battery temperature when entering the target CV constant voltage charging stage.

[0080] 3. Condition where the first battery parameter includes charging time: When the first battery parameter includes charging time, the first threshold parameter includes a threshold charging duration. Determine whether the charging time is greater than (greater than or equal to) the threshold charging duration. If the charging time is greater than (greater than or equal to) the threshold charging time, determine that the first battery parameter meets the preset condition, and execute S504.

[0081] If none of the parameters of the first battery meet the corresponding threshold parameter conditions, i.e., if the first battery parameter is determined not to meet the preset conditions, the electronic device continues to execute S505. In this embodiment, the first battery parameter can be any one or more of the above three cases, and this application does not limit the order or type of judgment.

[0082] S504: The electronic device has finished charging.

[0083] If the terminal device determines that S504 is to be executed, it can stop supplying power to the battery and end the charging process.

[0084] In this embodiment, the charging process will only end when S504 is executed; otherwise, the electronic device will continue to charge.

[0085] S505: First duration for electronic devices to remain charged.

[0086] If it is determined in S503 that the first battery parameters do not meet the preset conditions, it means that the battery is not fully charged. The electronic device can maintain charging for a first duration in the target CV stage, that is, after the first duration, execute S501 to reacquire the battery current and the first battery parameters.

[0087] Optionally, the electronic device may not execute S505. If it is determined in S503 that the first battery parameter does not meet the first threshold parameter, the electronic device may directly execute S501.

[0088] Optionally, the electronic device may skip S505 and instead periodically acquire the battery current and first battery parameters in S501, and directly execute S502 and S503 according to the acquisition cycle. That is, upon acquiring the corresponding parameters, a judgment is made directly without waiting for a charging period.

[0089] In the above embodiments, since the electronic device's judgment criteria include not only current but also first battery parameters, if the current does not meet the condition for ending charging, the first battery parameters are used to continue the judgment, ensuring that the battery can be charged to full capacity and charging can be stopped in a timely manner during the initial charging process. This also reduces the time spent on ineffective charging, saves energy, and improves the user's charging experience.

[0090] It should be noted that this application does not limit the order in which the battery current and the first battery parameters are obtained, nor the execution order of S502 and S503. In one possible scenario, if the battery current is obtained first, S502 is executed immediately. If, in S502, the battery current is less than or equal to the threshold current, charging is directly terminated, and execution stops. Figure 5 The process involves several steps. In S502, if the battery current exceeds the threshold current, the system waits to acquire the first battery parameter before executing S503. Alternatively, if the first battery parameter is acquired first, S503 can be executed directly. If the first battery parameter meets the first threshold parameter, charging can be stopped, and execution can cease. Figure 5 The process is as follows: otherwise, execute S505.

[0091] In this embodiment, the logic for determining current is retained. Electronic devices may have some batteries that are functioning correctly at the factory, allowing for accurate determination of charging cut-off based on current magnitude. However, some batteries may be faulty at the factory, making current an inaccurate criterion. Therefore, a first battery parameter can be added to determine whether charging should be stopped. By utilizing both battery current and the first battery parameter, it can be ensured that all batteries can be accurately stopped charging. Furthermore, the determination of the first battery parameter generally aims to ensure the battery is fully charged before stopping charging (e.g., the threshold cut-off time is slightly longer than the average time for a normal charge to fully charge). Therefore, electronic devices often experience slight overcharging, which is harmful to the battery in the long run. However, this process often requires accurate current determination, and the current determination for normal battery charging cut-off is usually the most accurate. Therefore, retaining the current-based determination for stopping charging improves the accuracy of the charging cut-off timing, extending battery life.

[0092] exist Figure 5 In the charging method, the parameters of the first battery can include various cases. Regarding these various cases, the following will discuss them in conjunction with... Figures 6-10 The embodiments illustrate the processing steps for different charging methods with different first battery parameters.

[0093] Figure 6 This is a schematic flowchart of a charging method disclosed in an embodiment of this application. Figure 6 As shown, the first battery parameter is the charging time, and the charging method may include, but is not limited to, the following steps:

[0094] S601: When the electronic device enters the target CV constant voltage charging stage, the electronic device acquires the battery current and charging time.

[0095] When the electronic device enters the target CV constant voltage charging stage, the acquisition of battery current by the electronic device can be referred to the relevant description in S501, which will not be repeated here.

[0096] When an electronic device begins the target CV constant voltage charging phase, the charging time can be obtained through a register. This means that the charging time is not timed from the start of charging, but rather from the start of the target CV constant voltage charging phase; therefore, the charging duration refers to the duration of charging during the target CV constant voltage phase.

[0097] When the electronic device receives battery current, S602 can be executed; when the electronic device receives charging time, S603 can be executed.

[0098] S602: The electronic device determines whether the battery current is less than (less than or equal to) a threshold current. If the battery current is less than (less than or equal to) the threshold current, execute S604; otherwise, execute S603.

[0099] The content of S602 can be found in the relevant description in S502, and will not be repeated here.

[0100] S603: The electronic device determines whether the charging time is greater than (greater than or equal to) a threshold charging time. If the charging time is greater than (greater than or equal to) the threshold charging time, proceed to S604; otherwise, proceed to S605.

[0101] The threshold charging time t1 can be set in advance. In the case of battery overvoltage charging with normal CV cutoff, t1 is the time from the last stage of overvoltage constant-voltage charging to the cutoff current. For example, the minimum value of the last stage constant-voltage charging time t for 10 cells can be taken as the cutoff condition (threshold charging time) for the final electronic device battery CV constant-voltage charging.

[0102] Furthermore, the content of S603 can be found in the relevant description of "conditions for the first battery parameters including charging time" in S503, and will not be repeated here.

[0103] S604: The electronic device has finished charging.

[0104] S605: Electronic devices maintain charging for the first duration.

[0105] For S604 and S605, please refer to the relevant descriptions in S504 and S505, which will not be repeated here.

[0106] In the above embodiments, the electronic device adds a charging time condition to the current condition. This ensures that the charging time of the electronic device reaches the threshold charging time and then stops charging, promptly reporting that the battery is fully charged. This improves the timeliness of battery charging stoppage, enhances the charging experience, and saves energy.

[0107] Figure 7 This is a schematic diagram of another charging method disclosed in an embodiment of this application. Figure 7 As shown, the first battery parameter is the charging capacity, and the charging method may include, but is not limited to, the following steps:

[0108] S701: When the electronic device enters the target CV constant voltage charging stage, the electronic device acquires the battery current and charging capacity.

[0109] When the electronic device enters the target CV constant voltage charging stage, the acquisition of battery current by the electronic device can be referred to the relevant description in S501, which will not be repeated here.

[0110] Once the electronic device has started the constant voltage charging phase (CV), it can detect the charging level using a fuel gauge to obtain the charging capacity. Charging capacity refers to the amount of charge the battery holds during the current charging process.

[0111] When the electronic device receives battery current, S702 can be executed; when the electronic device receives charging capacity, S703 can be executed.

[0112] S702: The electronic device determines whether the battery current is less than (less than or equal to) a threshold current. If the battery current is less than (less than or equal to) the threshold current, execute S704; otherwise, execute S703.

[0113] The content of S702 can be found in the relevant description in S502, and will not be repeated here.

[0114] S703: The electronic device determines whether the charging capacity is greater than (greater than or equal to) the threshold charging capacity. If the charging capacity is greater than (greater than or equal to) the threshold charging capacity, proceed to S704; otherwise, proceed to S705.

[0115] The threshold charging capacity C1 can be set in advance. In the case of battery overvoltage charging with normal CV cutoff, the charging capacity from the final stage of constant voltage charging to the cutoff current is denoted as C. For example, the minimum value of the final stage constant voltage charging capacity C for 10 cells can be taken as the cutoff condition for the final constant voltage charging of the electronic device battery.

[0116] Furthermore, the content of S703 can be found in the relevant description of "conditions for the first battery parameter including charging capacity" in S503, and will not be repeated here.

[0117] S704: Electronic device has finished charging.

[0118] S705: The first duration for which electronic devices remain charged.

[0119] For S704 and S705, please refer to the relevant descriptions in S504 and S505, which will not be repeated here.

[0120] In the above embodiments, the electronic device adds a charging capacity condition to the current condition, which can ensure that the charging capacity of the electronic device reaches the threshold charging capacity and then stops charging, promptly reporting that the battery is full, improving the timeliness of battery charging stop, enhancing the charging experience, and saving energy.

[0121] Figure 8 This is a schematic diagram of another charging method disclosed in an embodiment of this application. Figure 8 As shown, the first battery parameter is the battery temperature, and the charging method may include, but is not limited to, the following steps:

[0122] S801: When the electronic device enters the target CV constant voltage charging stage, the electronic device acquires the battery current and battery temperature.

[0123] When the electronic device enters the target CV constant voltage charging stage, the acquisition of battery current by the electronic device can be referred to the relevant description in S501, which will not be repeated here.

[0124] When the electronic device begins target buck CV constant voltage charging, it can detect the battery temperature using a temperature sensor to obtain the battery temperature. Battery temperature refers to the temperature of the battery during its current charging state. The battery temperature initially acquired at the start of target buck CV constant voltage charging is the initial battery temperature.

[0125] When the electronic device receives battery current, S802 can be executed; when the electronic device receives charging capacity, S803 can be executed.

[0126] S802: The electronic device determines whether the battery current is less than (less than or equal to) a threshold current. If the battery current is less than (less than or equal to) the threshold current, execute S804; otherwise, execute S803.

[0127] The content of S802 can be found in the relevant description in S502, and will not be repeated here.

[0128] S803: The electronic device determines whether the temperature rise of the battery is greater than (greater than or equal to) a threshold temperature difference. If the temperature rise of the battery is greater than (greater than or equal to) the threshold temperature difference, proceed to S804; otherwise, proceed to S805.

[0129] The threshold charging capacity T1 can be set in advance. A temperature sensor is attached to the cell surface to monitor the temperature rise (T) of the cell surface during the final stage of constant-voltage charging under the overvoltage charging regime until the cutoff current I1. For example, the minimum temperature rise of the cell surface during the final stage of constant-voltage charging of 10 cells can be taken as the cutoff condition for constant-voltage charging of the electronic device's battery.

[0130] Furthermore, the content of S803 can be found in the relevant description of "the first battery parameter includes the battery temperature condition" in S503, and will not be repeated here.

[0131] S804: Electronic device has finished charging.

[0132] S805: The first duration for which electronic devices remain charged.

[0133] For S804 and S805, please refer to the relevant descriptions in S504 and S505, which will not be repeated here.

[0134] In the above embodiments, the electronic device adds a battery temperature condition to the current condition. This ensures that the charging is stopped when the battery temperature rise reaches the threshold temperature difference, and the battery is reported as fully charged in a timely manner. This improves the timeliness of battery charging stoppage, enhances the charging experience, and saves energy.

[0135] Figure 9 This is a schematic diagram of another charging method disclosed in an embodiment of this application. Figure 9 As shown, the first battery parameters are charging capacity and charging time. The charging method may include, but is not limited to, the following steps:

[0136] S901: When the electronic device enters the target CV constant voltage charging stage, the electronic device acquires the battery current, charging capacity and charging time.

[0137] In particular, when the electronic device enters the target CV constant voltage charging stage, the process by which the electronic device obtains the battery current, charging capacity and charging time can be referred to the relevant descriptions in S501, S601 and S701, and will not be repeated here.

[0138] When the electronic device receives the battery current, S902 can be executed; when the electronic device receives the charging capacity, S903 can be executed; when the electronic device receives the charging time, S905 can be executed.

[0139] S902: The electronic device determines whether the battery current is less than (less than or equal to) a threshold current. If the battery current is less than (less than or equal to) the threshold current, execute S904; otherwise, execute S903 and S905.

[0140] The content of S902 can be found in the relevant description in S502, and will not be repeated here.

[0141] S903: The electronic device determines whether the charging capacity is greater than (greater than or equal to) the threshold charging capacity. If the charging capacity is greater than (greater than or equal to) the threshold charging capacity, proceed to S904; otherwise, proceed to S906.

[0142] The details of S903 can be found in "Conditions for the first battery parameter to include charging capacity" in S503, as well as the relevant description in S703, and will not be repeated here.

[0143] S904: Electronic device has finished charging.

[0144] For S904, please refer to the relevant description in S504, which will not be repeated here.

[0145] S905: The electronic device determines whether the charging time is greater than (greater than or equal to) a threshold charging duration. If the charging time is greater than (greater than or equal to) the threshold charging duration, S904 is executed; otherwise, S906 is executed.

[0146] The details of S905 can be found in "conditions for the first battery parameters to include charging time" in S503 and the relevant description in S603, and will not be repeated here.

[0147] S906: The first duration for which electronic devices remain charged.

[0148] After executing S906, S901 is executed. Optionally, the electronic device may skip S906 and directly execute S901.

[0149] For S906, please refer to the relevant description of S505, which will not be repeated here.

[0150] In the above embodiments, by increasing the charging capacity and charging time based on the current conditions, the electronic device can ensure that charging is stopped and the battery is fully charged in a timely manner while maintaining the threshold parameters of the electronic device, thereby improving the timeliness of battery charging stop, enhancing the charging experience, and saving energy.

[0151] Figure 10 This is a schematic diagram of another charging method disclosed in an embodiment of this application. Figure 10 As shown, the first battery parameters are charging capacity, charging time, and battery temperature. The charging method may include, but is not limited to, the following steps:

[0152] S1001: When the electronic device enters the target CV constant voltage charging stage, the electronic device acquires the battery current, charging capacity, charging time and battery temperature.

[0153] When the electronic device enters the target CV constant voltage charging stage, the acquisition of battery current by the electronic device can be referred to the relevant descriptions in S501, S601, S701 and S801, which will not be repeated here.

[0154] When the electronic device receives the battery current, S1002 can be executed; when the electronic device receives the charging capacity, S1003 can be executed; when the electronic device receives the battery temperature, S1005 can be executed; when the electronic device receives the charging time, S1006 can be executed.

[0155] S1002: The electronic device determines whether the battery current is less than (less than or equal to) a threshold current. If the battery current is less than (less than or equal to) the threshold current, execute S1004; otherwise, execute S1003, S1005, and S1006.

[0156] The content of S1002 can be found in the relevant description in S502, and will not be repeated here.

[0157] S1003: The electronic device determines whether the charging capacity is greater than (greater than or equal to) the threshold charging capacity. If the charging capacity is greater than (greater than or equal to) the threshold charging capacity, proceed to S1004; otherwise, proceed to S1007.

[0158] The content of S1003 can be found in "conditions for the first battery parameters to include charging capacity" in S503 and the relevant description in S703, and will not be repeated here.

[0159] S1004: Electronic device has finished charging.

[0160] S1004 can be referred to the relevant description in S504, and will not be repeated here.

[0161] S1005: The electronic device determines whether the temperature rise of the battery is greater than (greater than or equal to) the threshold temperature difference. If the temperature rise of the battery is greater than (greater than or equal to) the threshold temperature difference, execute S1004; otherwise, execute S1007.

[0162] Furthermore, the content of S1005 can be found in "the first battery parameter includes the condition of battery temperature" in S503 and the relevant description in S803, and will not be repeated here.

[0163] S1006: The electronic device determines whether the charging time is greater than (greater than or equal to) a threshold charging time. If the charging time is greater than (greater than or equal to) the threshold charging time, S1004 is executed; otherwise, S1007 is executed.

[0164] The content of S1006 can be found in "the condition that the first battery parameter includes the charging time" in S503 and the relevant description in S603, and will not be repeated here.

[0165] S1007: Electronic devices maintain charging for the first duration.

[0166] After executing S1007, execute S1001. Optionally, the electronic device may skip S1007 and directly execute S1001.

[0167] S1007 can be referred to the relevant description in S505, and will not be repeated here.

[0168] In the above embodiments, by increasing the charging capacity, charging time and battery temperature based on the current conditions, the electronic device can ensure that charging is stopped and the battery is fully charged in a timely manner while maintaining the threshold parameters of the electronic device, thereby improving the timeliness of battery charging stop, enhancing the charging experience and saving energy.

[0169] In the above Figures 5-10 In the implementation of the method, the electronic device adds a first battery parameter to determine whether to cut off charging. This means that new information needs to be collected and a judgment process needs to be added. A cutoff condition requires two variables to be judged. The increase in the amount of data acquired and the increase in the judgment conditions mean that the power consumption of the charging method will also increase, making the processing process more complicated.

[0170] Figure 11 This is a schematic diagram of another charging method disclosed in an embodiment of this application. Figure 11 As shown, the charging method may include, but is not limited to, the following steps:

[0171] The electronic device in this application embodiment may include a first charging cutoff strategy and a second charging cutoff strategy.

[0172] S1101: The electronic device is charged according to the first charging cutoff strategy.

[0173] The execution process of S1101 can be referenced. Figures 5-10 The description of the charging method is omitted. The first charging cutoff strategy is the indication... Figures 5-10 The content.

[0174] S1102: The electronic device determines whether the switching conditions are met. If the switching conditions are met, S1103 is executed; if the switching conditions are not met, S1101 is executed.

[0175] The switching condition refers to the switching condition of the charging cutoff strategy. The switching condition can be one of the following: charging number condition, charging time condition, or current cutoff condition.

[0176] The charging count condition refers to the number of times the electronic device is charged, which is a condition where the number of times the device is charged reaches a first quantity. The first quantity is not limited; for example, the first quantity is 100 times. The charging time condition refers to the time for the electronic device to charge the battery reaching a second time. The second time is not limited; for example, 100 hours. The current cutoff condition is the condition for ending charging based on the battery current being less than (or equal to) a threshold current for K consecutive times.

[0177] When the switching condition is the current cutoff condition, the switching condition is the condition that charging ends after K consecutive times based on the battery current being less than (or equal to) a threshold current. The electronic device can record that each charging end reason in S1101 is based on the condition that the battery current is less than (or equal to) the threshold current, rather than the charging end condition that the first battery parameters meet the preset condition. When the electronic device determines that charging ends after K consecutive times based on the battery current being less than (or equal to) the threshold current, the switching condition is met. Otherwise, the switching condition is not met. Here, K is an integer greater than 2, and K can be 2 to 10 times. The above judgment process can accurately determine that the electronic device no longer ends charging according to the preset condition of the first battery parameters, and can accurately judge the end of charging based on the battery current. Therefore, the condition that the first battery parameters meet the preset condition is no longer used for judgment, and S1103 to S1106 are executed. This ensures the accuracy of the charging cutoff strategy switching timing.

[0178] The processing steps S1103 to S1106 only involve using the battery current to determine the end of the charging process. At this point, the target CV constant voltage charging stage begins, and it is no longer necessary to obtain or determine the first battery parameters. The second charging cutoff strategy includes the charging methods in S1103 to S1106.

[0179] S1103: The electronic device acquires the battery current when the electronic device enters the target CV constant voltage charging state.

[0180] S1103 can refer to the relevant content of "obtaining battery current when entering the target CV constant voltage charging state" in S501, and will not be elaborated here.

[0181] S1104: The electronic device determines whether the battery current is less than (less than or equal to) a threshold current. If the battery current is less than (less than or equal to) the threshold current, proceed to S1105; otherwise, proceed to S1106.

[0182] S1104 can be referred to the relevant description in S502, and will not be repeated here.

[0183] S1105: Electronic device has finished charging.

[0184] S1105 can be referred to the relevant description in S504, and will not be repeated here.

[0185] S1106: The electronic device continues to charge. After executing S1106, execute S1103.

[0186] Optionally, the electronic device may not execute S1106. If the battery current is greater than or equal to (greater than) the threshold current, the contents of S1103 may also be executed.

[0187] S1106 can be referred to the relevant description in S505, and will not be repeated here.

[0188] In the above process, after a long charging period, when the number of shuttle pairs formed by Co ions decreases to a certain extent, the number of shuttle pairs can no longer affect the result of determining whether the charging is stopped based on the battery current threshold. At this point, the electronic device's determination of charging stoppage based on battery current is accurate. In the early stages of battery use, the first charging stoppage strategy can be used to ensure the battery reports full charge in a timely manner and stops charging. Once Co ions no longer affect the current-based stoppage determination, a second charging stoppage strategy can be switched to, and this strategy should be maintained thereafter. This reduces the acquisition and judgment of the first battery parameters, ensuring switching accuracy while reducing processing steps, improving processing efficiency, and saving energy and processing resources.

[0189] Figure 12 A schematic diagram of the hardware structure of the electronic device 100 is shown.

[0190] Electronic device 100 may include processor 110, external memory interface 120, internal memory 121, universal serial bus (USB) interface 130, charging management module 140, power management module 141, battery 142, antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, sensor module 180, and display screen 194, etc.

[0191] It is understood that the structures illustrated in the embodiments of the present invention do not constitute a specific limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0192] Processor 110 may include one or more processing units, such as: application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, memory, video codec, digital signal processor (DSP), baseband processor, and / or neural network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors. Optionally, processor 110 may execute... Figures 5-11 The charging method.

[0193] The power management module 141 connects the battery 142, the charging management module 140, and the processor 110. The power management module 141 receives input from the battery 142 and / or the charging management module 140, and supplies power to the processor 110, internal memory 121, external memory, display screen 194, and wireless communication module 160, etc. The power management module 141 can also monitor parameters such as battery capacity, battery cycle count, and battery health status (leakage current, impedance). In some other embodiments, the power management module 141 may also be located within the processor 110. In other embodiments, the power management module 141 and the charging management module 140 may be located in the same device. In the embodiments of this application, the power management module 141 can perform... Figures 5-11 The charging method.

[0194] The wireless communication function of electronic device 100 can be implemented through antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, modem processor, and baseband processor.

[0195] The mobile communication module 150 can provide solutions for wireless communication, including 2G / 3G / 4G / 5G, applied to the electronic device 100. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves via antenna 1, and perform filtering, amplification, and other processing on the received electromagnetic waves before transmitting them to a modem processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modem processor and convert it into electromagnetic waves for radiation via antenna 1. In some embodiments, at least some functional modules of the mobile communication module 150 may be housed in the processor 110. In some embodiments, at least some functional modules of the mobile communication module 150 and at least some modules of the processor 110 may be housed in the same device.

[0196] The wireless communication module 160 can provide solutions for wireless communication applications on the electronic device 100, including wireless local area networks (WLANs) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared (IR) technologies. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via antenna 2, performs frequency modulation and filtering of the electromagnetic wave signals, and sends the processed signal to processor 110. The wireless communication module 160 can also receive signals to be transmitted from processor 110, perform frequency modulation and amplification, and convert them into electromagnetic waves for radiation via antenna 2.

[0197] Display screen 194 is used to display images, videos, etc. Display screen 194 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a miniature LED, a microLED, a quantum dot light-emitting diode (QLED), etc. In some embodiments, electronic device 100 may include one or N displays 194, where N is a positive integer greater than 1.

[0198] The electronic devices in the embodiments of this application may be mobile phones, tablets, desktops, laptops, handheld computers, smart bracelets, super mobile personal computers, netbooks, personal phones, personal data assistants, augmented reality (AR) / virtual reality (VR) and other touch screen devices. This application does not limit the specific form of the electronic devices.

[0199] As used in the above embodiments, depending on the context, the term "when..." can be interpreted as meaning "if...", "after...", "in response to determining...", or "in response to detecting...". Similarly, depending on the context, the phrase "when determining..." or "if (the stated condition or event) is interpreted as meaning "if determining...", "in response to determining...", "when (the stated condition or event) is detected", or "in response to detecting (the stated condition or event)".

[0200] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive), etc.

[0201] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A charging method, characterized in that, The method is applied to an electronic device, and the method includes: When the electronic device is charging the battery, if it is in the last constant voltage charging stage, it acquires the first battery current and the first battery parameters; the first battery current and the first battery parameters are used to determine whether charging has ended. When the first battery current is greater than the threshold current and the first battery parameters meet the preset conditions, the electronic device ends charging. The first battery parameters include one or more of charging time, battery temperature, and charging capacity; the charging time is the length of time the electronic device takes to enter the last constant voltage charging stage; the battery temperature includes the initial battery temperature and the current battery temperature when the electronic device enters the last constant voltage charging stage; the charging capacity is the charging capacity of the battery. The first battery parameter satisfies the preset condition if at least one parameter among all parameters included in the first battery parameter satisfies the corresponding threshold condition; if the first battery parameter includes the charging time, and the charging time is greater than or equal to the threshold charging time, the electronic device determines that the first battery parameter satisfies the preset condition; if the first battery parameter includes the battery temperature, and the temperature rise of the battery temperature during the last constant voltage charging stage is greater than or equal to the threshold temperature difference, the electronic device determines that the first battery parameter satisfies the preset condition; if the first battery parameter includes the charging capacity, and the charging capacity is greater than or equal to the threshold charging capacity, the electronic device determines that the first battery parameter satisfies the preset condition.

2. The method according to claim 1, characterized in that, The method further includes: The electronic device ends charging when the first battery current is less than or equal to the threshold current.

3. The method according to claim 1 or 2, characterized in that, The method further includes: When the first battery parameters meet the preset conditions, the electronic device ends charging.

4. The method according to claim 1 or 2, characterized in that, The method further includes: If the first battery current is greater than the threshold current and the first battery parameters do not meet the preset conditions, the electronic device continues charging and re-executes the steps of obtaining the first battery current and the first battery parameters.

5. The method according to claim 1 or 2, characterized in that, The method further includes: the electronic device ending charging; The electronic device determines whether the switching conditions are met; When the switching conditions are met, if the electronic device is charging the battery and is in the last constant voltage charging stage, it acquires the battery current and the first battery parameters to determine whether to end the charging process. If the switching conditions are not met, when the electronic device is charging the battery, if it is in the last constant voltage charging stage, it determines whether to end the charging based on the battery current.

6. The method according to claim 5, characterized in that, When the electronic device is charging the battery, if it is in the final constant-voltage charging phase, it determines whether to end the charging process based on the battery current, including: When charging the battery, if it is in the last constant voltage charging stage, the electronic device obtains the battery current. If the battery current is less than or equal to the threshold current, the electronic device ends charging; if the battery current is greater than the threshold current, the electronic device continues charging.

7. The method according to claim 5, characterized in that, The switching condition is that charging is terminated K times consecutively based on the battery current being less than or equal to a threshold current, where K is an integer greater than 2.

8. An electronic device, characterized in that, include: A battery, one or more processors, and one or more memories; the one or more processors are coupled to the one or more memories, the one or more memories being used to store computer program code, the computer program code including computer instructions, which, when executed by the one or more processors, cause the electronic device to perform the method as described in any one of claims 1-7.

9. A computer-readable storage medium comprising instructions, characterized in that, When the instructions are executed on an electronic device, the electronic device causes the electronic device to perform the method as described in any one of claims 1-7.

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