Charging management method, storage medium, electronic device and program product

Abstract

The present application relates to the technical field of charging. Disclosed are a charging management method, a storage medium, an electronic device and a program product. The method comprises: deploying a battery management module on a battery protection board of a battery module in a mobile phone, the voltage sampling error of the battery management module being smaller than that of a charging management module deployed on a mainboard of the mobile phone; and in a charging process of the mobile phone, on the basis of a target voltage sampled, by the battery management module having the smaller voltage sampling error, each time a battery cell is in a charging completion state, a control module adjusting a buck cut-off voltage in the next charging process of the mobile phone, such that the buck cut-off voltage in the next charging process of the mobile phone is closer to a designed voltage of the battery cell in the battery module, and the voltage of the battery cell can gradually get close to the designed voltage in each subsequent charging process of the mobile phone, thereby ensuring the capacity utilization rate of the battery cell.

Description

Charging management method, storage medium, electronic device and program product

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 3, 2024, with application number 202410011042.9 and invention name “Charging management method, storage medium, electronic device and program product”. The entire contents of the above patent are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of charging technology, and in particular to a charging management method, storage medium, electronic device, and program product. Background Art

[0003] When an electronic device is connected to an external power source for charging, its charging power management unit (CPMU) receives a power signal from the external power source and converts it into electrical energy, which is then supplied to the battery module within the electronic device. Subsequently, when the CPMU detects that the cell voltage in the battery module has reached a preset cutoff voltage, it determines that the battery module is fully charged and stops supplying electrical energy to the battery module.

[0004] However, due to the detection error problem that may exist in the charging management module, the charging management module may determine that the battery module is in the charging completion state when the battery cell voltage has not reached the cut-off voltage, causing the charging management module to stop supplying power to the battery module when the battery module is not fully charged, resulting in a waste of battery capacity. Summary of the Invention

[0005] Embodiments of the present application provide a charging management method, a storage medium, an electronic device, and a program product.

[0006] In the first aspect, the present application provides a charging management method, which is applied to an electronic device, characterized in that the electronic device includes a charging management module, a battery management module, a battery module and a control module, wherein the battery module includes a battery cell and a battery protection board, and the battery management module is arranged on the battery protection board; during the charging process of the electronic device, the charging management module detects that the first voltage of the battery cell and the first cut-off voltage meet the target difference relationship, and determines that the battery cell is in a charging completion state; the control module determines the second voltage of the battery cell sampled by the battery management module when the battery cell is in the charging completion state; the control module adjusts the first cut-off voltage based on the size relationship between the second voltage and a preset third voltage to obtain a second cut-off voltage, and uses the second cut-off voltage as the judgment voltage for the next detection of whether the target difference relationship is met by the charging management module.

[0007] In the embodiment of the present application, the battery management module deployed on the battery protection board of the mobile phone has a smaller voltage sampling error than the charging management module deployed on the mainboard of the mobile phone. During the charging process of the mobile phone, the control module uses the voltage sampled by the battery management module with a smaller voltage sampling error each time the battery cell is in the charging complete state to adjust the buck cutoff voltage for the next charging process of the mobile phone. This makes the buck cutoff voltage of the next charging process of the mobile phone closer to the design voltage of the battery cell in the battery module. In turn, the voltage of the battery cell of the mobile phone can gradually approach the design voltage during the successive charging process of the mobile phone, ensuring the utilization rate of the battery cell capacity.

[0008] In a possible implementation of the first aspect above, the control module adjusts the first cutoff voltage to obtain the second cutoff voltage based on the magnitude relationship between the second voltage and a preset third voltage, including: corresponding to the control module determining that the charging state of the electronic device during the charging process meets the target condition, the control module adjusts the first cutoff voltage to obtain the second cutoff voltage based on the magnitude relationship between the second voltage and the third voltage.

[0009] In a possible implementation of the first aspect above, the control module determines that the charging status of the electronic device during the charging process meets the target conditions, including: corresponding to the control module determining that the charging temperature and charging current of the electronic device are within the first target range, the charging status of the electronic device meets the target conditions.

[0010] In a possible implementation of the first aspect above, the control module adjusts the first cutoff voltage to obtain the second cutoff voltage based on the magnitude relationship between the second voltage and a preset third voltage, including: corresponding to the difference between the second voltage and the third voltage being less than or equal to the first value, the second cutoff voltage is equal to the first cutoff voltage; corresponding to the difference between the second voltage and the third voltage being greater than the first value, the second cutoff voltage is greater than the first cutoff voltage.

[0011] In a possible implementation of the first aspect above, corresponding to the charging management module detecting that the first voltage of the battery cell and the first cut-off voltage meet the target difference relationship, determining that the battery cell is in a charging completion state includes: corresponding to the charging management module detecting that the absolute value of the difference between the first voltage and the first cut-off voltage is within a first numerical range, and the first voltage and the first cut-off voltage meet the target difference relationship.

[0012] In a possible implementation of the first aspect above, corresponding to the charging management module detecting that the first voltage of the battery cell and the first cut-off voltage satisfy a target difference relationship, determining that the battery cell is in a charging completion state includes: corresponding to the charging management module detecting that the first voltage and the first cut-off voltage satisfy the target difference relationship, the charging management module sends a first notification to the control module; based on the first notification and the first condition that the first current of the battery cell sampled by the battery management module is within a first current range, the control module determines that the battery cell is in a charging completion state.

[0013] In a possible implementation of the first aspect above, the method further includes: a charging management module is disposed on a mainboard of the electronic device, and a first distance between the charging management module and the battery cell is greater than a second distance between the battery management module and the battery cell.

[0014] In a possible implementation of the first aspect above, the third voltage includes: a design voltage of the battery cell; the charging management module includes: a buck charging management unit; and the first cutoff voltage and / or the second cutoff voltage is: a buck cutoff voltage.

[0015] In a second aspect, an embodiment of the present application provides a readable storage medium having instructions stored thereon, which, when executed on an electronic device, enables the electronic device to implement any one of the charging management methods provided by the first aspect and various possible implementations of the first aspect.

[0016] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a memory for storing instructions executed by one or more processors of the electronic device; and a processor, which is one of the processors of the electronic device, for executing the instructions stored in the memory to implement any one of the charging management methods provided in the above-mentioned first aspect and various possible implementations of the above-mentioned first aspect.

[0017] In a fourth aspect, an embodiment of the present application provides a program product, which includes instructions. When the instructions are executed by an electronic device, the electronic device can implement any charging management method provided by the above-mentioned first aspect and various possible implementations of the above-mentioned first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 shows a scene diagram of a mobile phone charging according to some embodiments of the present application;

[0019] FIG2 shows a module diagram of a charging management module according to some embodiments of the present application;

[0020] FIG3 shows a hardware structure diagram of a mobile phone according to some embodiments of the present application;

[0021] FIG4 is a schematic diagram showing a process flow of dynamic voltage adjustment according to some embodiments of the present application;

[0022] FIG5 shows a flowchart of steps of a charging management method according to some embodiments of the present application;

[0023] FIG6 shows a hardware structure diagram of another mobile phone according to some embodiments of the present application. DETAILED DESCRIPTION

[0024] The illustrative embodiments of the present application include, but are not limited to, a charging management method, a storage medium, an electronic device, and a program product.

[0025] The technical solution of the present application is introduced below with reference to Figures 1 to 6 .

[0026] In some embodiments, as shown in FIG1 , when a user uses a power adapter (not shown) to connect to a mobile phone 100 via a universal serial bus (USB) cable 10, and then connects the power adapter to an external power source (e.g., a mains power source with a voltage of 220 volts and a frequency of 50 Hz), the power adapter can provide a power signal from the external power source to a charging management module (e.g., a CPMU) in the mobile phone 100 via the USB cable 10. The charging management module converts the power signal into electrical energy to be provided to a battery module in the mobile phone 100 or for use by the mobile phone 100 during current operation, thereby charging the mobile phone 100. In other embodiments, the mobile phone 100 can also be charged wirelessly, which is not specifically limited.

[0027] In some embodiments, the charging mode of the mobile phone 100 may include a fast charging mode (hereinafter referred to as the fast charging mode) and a normal charging mode (hereinafter referred to as the normal charging mode).

[0028] For example, as shown in FIG2 , when the mobile phone 100 is connected to the power adapter 20 via the USB cable 10 for charging, in the early stage of charging, the mobile phone 100 can implement a fast charging mode through the switched capacitor (SC) charging unit 12A in the charging management module 12. In the later stage of charging, the mobile phone 100 can switch to a normal charging mode through the buck charging unit 12B in the charging management module 12. In the normal charging mode, the buck charging unit 12B generally replenishes the battery module 142 using a constant voltage charging method. When the buck charging unit 12B in the charging management module 12 detects that the cell voltage of the battery module 142 has reached a preset buck cut-off voltage, it determines that the battery module 142 is in a fully charged state and cuts off the charging path of the battery module 142 to control charging to stop.

[0029] In some embodiments, the buck charger may have detection errors, such as a voltage detection error of ±20mV. To prevent battery overvoltage, the buck cutoff voltage is typically set lower than the design voltage of the battery cells in the battery module based on the buck charger voltage detection error.

[0030] For example, if the design voltage of the battery cells in a battery module is 4500mV, meaning the cell charge limit voltage is 4500mV, and the buck charger's voltage detection error is ±20mV, the buck cutoff voltage can typically be set to 4480mV. Thus, when the buck charger's voltage detection error is +20mV, the buck charger simply adds the 20mV error to the buck cutoff voltage of 4480mV to determine that the battery module is fully charged. This does not exceed the design voltage of the battery cells, thus preventing overvoltage issues.

[0031] However, due to the ±20mV voltage detection error of the buck charger, setting the buck cutoff voltage to 4480mV may cause the buck charger to determine that the battery module is fully charged at a lower voltage. For example, if the buck cutoff voltage is set to 4480mV and the buck charger's voltage detection error is -20mV, the buck charger may deduct the 20mV error from the 4480mV buck cutoff voltage to determine that the battery module is fully charged, resulting in the buck charger stopping supplying power to the battery module before it is fully charged, wasting battery capacity.

[0032] To this end, the present application proposes a charging management method, which deploys a battery management module (BMS) on the circuit protection board (hereinafter referred to as the battery protection board) of the battery module in the mobile phone, samples the voltage of the battery cell in the battery module through the battery management module and sends the sampled voltage to the control module in the mobile phone. During the charging process of the mobile phone, when the buck charging unit detects that the cell voltage of the battery cell in the battery module reaches the buck cut-off voltage to judge that the battery is in the charging completion state, the control module determines the target voltage sampled by the battery management module when the battery cell is in the charging completion state based on the charging completion state of the battery. Subsequently, the control module adjusts the current buck cut-off voltage based on the relationship between the target voltage and the design voltage of the battery cell, so that the adjusted buck cut-off voltage is closer to the design voltage than the current buck cut-off voltage, and uses the adjusted buck cut-off voltage as the judgment voltage of the buck charging unit during the next charging process of the mobile phone.

[0033] It is understood that the battery management module typically implements sampling functions through an analog-to-digital converter (ADC), while the charging management module typically implements detection functions through a voltage comparator in the buck charging unit. The ADC has a smaller error than the voltage comparator. For example, the ADC's error is ±5mV, while the voltage comparator's error is ±20mV. This means that the battery management module has smaller errors and higher precision than the charging management module. Furthermore, the battery management module is deployed on the battery protection board, while the charging management module is typically deployed on the motherboard of the mobile phone. This means that the distance between the charging management module and the battery cell is typically greater than the distance between the battery management module and the battery cell. Since the battery management module is closer to the battery cell than the charging management module, the battery management module, while having a smaller error than the charging management module, further improves the sampling accuracy of the battery management module and reduces the sampling error of the battery management module.

[0034] In this way, during the charging process of the mobile phone, the control module adjusts the buck cutoff voltage of the next mobile phone charging process through the target voltage sampled by the battery management module with smaller error and higher accuracy each time the battery cell is in the charging complete state, so that the buck cutoff voltage of the next mobile phone charging process is closer to the design voltage of the battery cell, and then the battery cell voltage of the mobile phone can gradually approach the design voltage of the battery cell during the successive charging process, ensuring the battery cell capacity utilization rate.

[0035] It is understood that the above-mentioned mobile phone is only an example of an electronic device applied to the method of the embodiment of the present application. In some embodiments, the electronic device may also be a smart TV, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) device, an augmented reality (AR) device, a wireless device in industrial control (industrial control), a wireless device in self-driving (self-driving), a wireless device in remote medical surgery, a wireless device in a smart grid (smart grid), a wireless device in transportation safety (transportation safety), a wireless device in a smart city (smart city), a wireless device in a smart home (smart home), etc., without specific limitation.

[0036] The embodiments of the present application are described below by taking the mobile phone 100 shown in FIG. 1 and FIG. 2 as an example of an electronic device.

[0037] FIG3 shows a hardware structure diagram of a mobile phone 100 according to some embodiments of the present application.

[0038] In some embodiments, as shown in FIG3 , a mobile phone 100 is configured with a motherboard 300, a USB interface 301, and a battery module. The battery module includes a battery cell 11 and a battery protection board 31. A battery management module 32 is configured on the battery protection board 31, and a buck charging unit 12B is configured on the motherboard 300. The positive and negative terminals of the battery cell 11 are connected to the buck charging unit 12B, and the positive and negative terminals of the USB interface 301 are connected to the buck charging unit 12B. The mobile phone 100 is connected to a USB cable via the USB interface 301, and the power adapter provides a power signal to the mobile phone 100 through the USB cable and the USB interface 301 to charge the mobile phone 100.

[0039] In some embodiments, as shown in FIG3 , the battery cell 11 has a three-electrode structure, for example, the battery cell 11 includes two positive electrodes and one negative electrode, and both the positive electrodes and the negative electrode of the battery cell 11 are connected to the buck charging unit 12B. In other embodiments, the battery cell 11 may also have a two-electrode structure or other structures, for example, the battery cell 11 includes one positive electrode and one negative electrode, and both the positive electrode and the negative electrode of the battery cell 11 are connected to the buck charging unit 12B, without limitation.

[0040] In some embodiments, when the mobile phone 100 is in normal charging mode, the power adapter transmits a power signal from an external power source to the buck charging unit 12B via a USB cable and USB interface 301. Buck charging unit 12B then replenishes power to the battery cell 11 using a constant voltage charging method based on the power signal. When buck charging unit 12B detects that the cell voltage of the battery cell 11 has reached the buck cutoff voltage, it determines that the battery cell 11 is fully charged and disconnects the charging path of the battery cell 11 to stop charging. Buck charging unit 12B then sends a status message to the control module indicating that the battery cell 11 is fully charged.

[0041] It is understandable that the buck charging unit 12B may have a detection error problem, such as the voltage detection error of the buck charging unit 12B may be between ±20mV, and the corresponding buck cut-off voltage is 4480mV. In this way, when the buck charging unit 12B has a voltage detection error and judges that the battery cell 11 is in the charging complete state, the cell voltage of the battery cell 11 may not actually reach 4480mV or exceed 4480mV. For example, when the buck charging unit 12B has a voltage detection error of -20mV, the buck charging unit 12B may judge that the battery cell 11 is in the charging complete state when the cell voltage of the battery cell 11 reaches 4460mV.

[0042] In other words, the buck charging unit 12B actually determines whether the battery cell 11 is fully charged based on the error range of the buck charging unit 12B's own voltage detection error. For example, when the buck charging unit 12B's voltage detection error is -20mV, the buck charging unit 12B may determine that the battery cell 11 is fully charged when the battery cell voltage reaches 4460mV. Or, for example, when the buck charging unit 12B's voltage detection error is -10mV, the buck charging unit 12B may determine that the battery cell 11 is fully charged when the battery cell voltage reaches 4470mV.

[0043] Therefore, it can be seen that when the buck charging unit 12B determines whether the battery cell 11 is in the charging complete state, it is actually determined based on the difference between the cell voltage of the battery cell 11 detected by the buck charging unit 12B and the buck cut-off voltage, and the difference between the voltage detection error of the buck charging unit 12B (an example of the corresponding target difference relationship). For example, when the voltage detection error of the buck charging unit 12B is -20mV, and the buck charging unit 12B detects that the cell voltage of the battery cell 11 is 4460mV, the difference between 4460mV and the buck cut-off voltage of 4480mV is -20mV. Therefore, the buck charging unit 12B can determine that the battery cell 11 is in the charging complete state based on the detected cell voltage of 4460mV.

[0044] That is to say, if the voltage detection error of the buck charging unit 12B is between ±20mV, when the buck charging unit 12B detects that the absolute value of the difference between the cell voltage of the battery cell 11 and the buck cut-off voltage is in the range of 0 to 20mV (an example corresponding to the first numerical range), the buck charging unit 12B is likely to judge that the battery cell 11 is in a charging completion state.

[0045] In some embodiments, the battery management module 32 deployed on the battery protection board 31 has the function of sampling the voltage and current of the battery cell 11. For example, the battery management module 32 can implement the sampling function through the ADC in the battery management module 32, or the battery management module 32 can also implement the sampling function by connecting the buck charging unit 12B and the battery cell 11, without limitation.

[0046] It can be understood that, as shown in Figure 3, the battery management module 32 deployed on the battery protection board 31 is closer to the battery cell 11 than the buck charging unit 12B deployed on the main board 300, so that the battery management module 32 can avoid the voltage sampling error caused by the connection impedance, connector fastening impedance, etc. between the main board 300 and the battery protection board 31 during charging and discharging of the battery cell 11, thereby improving the sampling accuracy of the battery management module 32. Moreover, since the battery management module 32 has a built-in ADC with higher accuracy and smaller error than the voltage comparator in the buck charging unit 12B, the voltage sampling of the battery management module 32 is closer to the actual battery cell voltage of the battery cell 11.

[0047] In some embodiments, the battery management module 32 can be connected to a control module (such as a processor, not shown in the figure) in the mobile phone 100 so that the battery management module 32 can send the sampled voltage and current to the control module for corresponding processing by the control module.

[0048] In some embodiments, to more accurately determine the charging completion status of the battery cell 11, the control module can be combined with the buck charging unit 12B and the battery management module 32 to determine the charging completion status of the battery cell 11. For example, when the buck charging unit 12B detects that the battery cell voltage of the battery cell 11 has reached the buck cut-off voltage, the buck charging unit 12B sends a first notification to the control module. After receiving the first notification, the control module determines that the battery cell 11 is in the charging completion state when it determines that the current of the battery cell 11 sampled by the battery management module 32 has reached a preset cut-off current, such as a cut-off current of 150mA. The control module then controls the buck charging unit 12B to cut off the charging path of the battery cell 11 to stop charging.

[0049] Furthermore, when the battery cell 11 is fully charged, the control module determines the target voltage sampled by the battery management module 32 when the battery cell 11 is fully charged. Subsequently, based on the relationship between the target voltage and the design voltage of the battery cell, the control module adjusts the current buck cutoff voltage so that the adjusted buck cutoff voltage is closer to the design voltage than the current buck cutoff voltage. The adjusted buck cutoff voltage is then used as the judgment voltage for the buck charging unit during the next mobile phone charging process.

[0050] In some embodiments, the control module can dynamically adjust the current buck cutoff voltage based on the relationship between the target voltage and the design voltage of the battery cell 11. For example, when the voltage difference between the target voltage and the design voltage is greater than or equal to 10mV and less than 20mV, the control module adjusts the current buck cutoff voltage by 10mV. Alternatively, when the voltage difference between the target voltage and the design voltage is greater than or equal to 20mV, the control module adjusts the current buck cutoff voltage by 20mV.

[0051] In some embodiments, to avoid overvoltage in charging the battery cell, the control module may determine the size relationship between the target voltage and the design voltage of the battery cell 11 based on the voltage sampling error that may exist in the battery management module 32. For example, the voltage sampling error of the battery management module 32 may be ±5mV. Then, when determining the size relationship between the target voltage and the design voltage of the battery cell 11, the control module may determine the size relationship between the target voltage and the design voltage minus 5mV based on the design voltage minus 5mV. For example, the target voltage sampled by the battery management module 32 when the battery cell 11 is in the fully charged state is 4482mV. The size relationship between the target voltage and the design voltage can be determined according to the following formula (1). 4500mV-5mV-4482mV=13mV (1)

[0052] In formula (1), 4500 mV represents the design voltage of the battery cell, 5 mV represents the voltage sampling error of the battery management module 32, and 4482 mV represents the target voltage sampled by the battery management module 32 when the battery cell 11 is in the fully charged state.

[0053] It can be understood that according to formula (1), when the voltage difference between the target voltage and the design voltage is greater than 10mV and less than 20mV, the control module can adjust the current buck cutoff voltage by 10mV. For example, if the current buck cutoff voltage is 4480mV, the adjusted buck cutoff voltage is 4490mV.

[0054] It is understandable that although the battery management module 32 may have voltage sampling errors, since the battery management module 32 usually has a built-in high-precision ADC, it has higher accuracy than the voltage comparator of the buck charging unit 12B, and the battery management module 32 is arranged closer to the battery cell 11, that is, the voltage sampling error of the battery management module 32 is smaller than the voltage detection error of the buck charging unit 12B. The control module uses the target voltage sampled by the battery management module 32, which has a smaller voltage sampling error, each time the battery cell is in the charging complete state, to adjust the buck cutoff voltage during the next mobile phone charging process. This makes the buck cutoff voltage during the next mobile phone charging process closer to the design voltage of the battery cell, thereby allowing the battery cell voltage to gradually approach the design voltage during each charging process of the mobile phone, ensuring the battery cell capacity utilization rate.

[0055] The following is an example to illustrate the voltage adjustment process.

[0056] FIG4 shows a schematic diagram of voltage adjustment according to some embodiments of the present application.

[0057] In some embodiments, as shown in FIG4 , when the control module determines that the battery cell is in a charging completion state, step S401 is executed to dynamically adjust the buck cutoff voltage in the buck charging unit.

[0058] In some embodiments, when the control module performs dynamic voltage adjustment, in order to improve the adjustment accuracy, the control module may execute step S402 to determine whether the charging state of the mobile phone 100 during the charging process meets the target conditions. For example, the control module determines whether this is the first cut-off voltage adjustment during the charging process to avoid adjusting the buck cut-off voltage multiple times after one charge is completed; or for example, the control module determines whether the power adapter is a fast charging charger during the charging process, whether there is current limiting on the USB cable, whether the charging temperature is between 0 and 45 degrees, etc., to avoid voltage sampling abnormalities caused by hardware adaptation problems (such as power adapter and USB cable) or environmental factors (such as temperature). Subsequently, when the control module determines that the charging state of the mobile phone 100 during the charging process meets the target conditions, the current buck cut-off voltage is adjusted based on the relationship between the target voltage and the design voltage of the battery cell.

[0059] In some embodiments, when adjusting the current buck cutoff voltage based on the relationship between the target voltage and the design voltage of the battery cell, the control module first performs step S403 to determine a voltage difference based on the target voltage, the design voltage of the battery cell, and any voltage sampling error that may exist in the battery management module 32. The specific process can be found in the description of formula (1) above and is not further described here. After determining the voltage difference, the control module determines an adjustment voltage to be adjusted corresponding to the current buck cutoff voltage based on the magnitude of the voltage difference.

[0060] In some embodiments, after determining the voltage difference, the control module executes step S4041. During step S4041, if the control module determines that the voltage difference is less than or equal to 0 mV, the control module executes step S4042 to determine that the adjusted voltage is 0 mV. The control module then executes step S41 to reset the current buck cutoff voltage based on the adjusted voltage. After the reset is complete, the control module executes step S42 to terminate the dynamic voltage adjustment of the battery cell when it is in the charge-completed state. For example, if the current buck cutoff voltage is 4480 mV, the reset cutoff voltage is 4480 mV.

[0061] It can be understood that the voltage difference is less than 0mV when the buck charging unit determines that the cell voltage of the battery cell has reached the buck cutoff voltage when there is a +20mV voltage detection error, and the battery management module has a +5mV voltage sampling error. For example, the buck cutoff voltage is 4480. Since the buck charging unit has a +20mV voltage detection error, the buck charging unit determines that the cell voltage of the battery cell has reached the buck cutoff voltage when the cell voltage is 4500mV. Since the battery management module also has a +5mV voltage sampling error, the target voltage sampled by the battery management module when the cell voltage is 4500mV is 4505mV. According to the above formula (1), the voltage difference is -5mV.

[0062] In some embodiments, during step S4041, if the control module determines that the voltage difference is greater than 0 mV, the control module executes step S4051. During step S4051, if the control module determines that the voltage difference is greater than 0 mV and less than 10 mV, the control module executes step S4052 to determine that the adjusted voltage is 0 mV. The control module then executes step S41 to reset the current buck cutoff voltage based on the adjusted voltage. After the reset is complete, the control module executes step S42 to terminate the dynamic voltage adjustment of the battery cell during the current charge complete state. For example, if the current buck cutoff voltage is 4480 mV, the reset cutoff voltage is 4480 mV.

[0063] In some embodiments, during step S4051, if the control module determines that the voltage difference is greater than or equal to 10 mV, the control module executes step S4061. During step S4061, if the control module determines that the voltage difference is greater than or equal to 10 mV and less than 20 mV, the control module executes step S4062 to determine that the adjusted voltage is 10 mV. The control module then executes step S41 to reset the current buck cutoff voltage based on the adjusted voltage. After the reset is complete, the control module executes step S42 to terminate the dynamic voltage adjustment of the battery cell during the current fully charged state. For example, if the current buck cutoff voltage is 4480 mV, the reset cutoff voltage is 4490 mV.

[0064] In some embodiments, during step S4061, if the control module determines that the voltage difference is greater than or equal to 10 mV, the control module executes step S4071. During step S4071, if the control module determines that the voltage difference is greater than or equal to 20 mV, the control module executes step S4072 to determine that the adjusted voltage is 20 mV. The control module then executes step S41 to reset the current buck cutoff voltage based on the adjusted voltage. After the reset is complete, the control module executes step S42 to terminate the dynamic voltage adjustment of the battery cell during the current charge complete state. For example, if the current buck cutoff voltage is 4480 mV, the reset cutoff voltage is 4500 mV.

[0065] It is understandable that the control module usually needs to determine the size of the adjustment voltage based on the step of the buck charging unit. The step is used to represent the minimum unit of the buck charging unit's adjustable voltage. For example, the step of the buck charging unit is 10mV. When the voltage difference is less than 10mV, the buck cut-off voltage is not adjusted, and it is only adjusted when it is greater than or equal to 10mV. In other embodiments, the step of the buck charging unit can also be other values, such as 5mV. Correspondingly, the control module can determine that the adjustment voltage is 5mV when the voltage difference is greater than or equal to 5mV, without specific limitation.

[0066] In some embodiments, the battery management module may also integrate battery anti-counterfeiting and battery protection functions. The battery anti-counterfeiting function enables anti-counterfeiting identification of the battery, while the battery protection function enables protection of the battery cell's voltage, current, and temperature. As can be understood, the battery management module is deployed on the battery protection board, eliminating the need for mainboard space. The integration of both anti-counterfeiting and battery protection functions creates a high level of integration, effectively improving the overall performance of the phone.

[0067] The embodiments of the present application are further illustrated below through the examples of Figures 3 and 4.

[0068] FIG5 shows a flowchart of a charging management method according to some embodiments of the present application. As shown in FIG5 , the steps include:

[0069] S501: When the buck charging unit detects that the cell voltage reaches the buck cut-off voltage, and the control module determines that the cell current sampled by the battery management module reaches the preset cut-off current, the control module determines that the cell is in a charging complete state.

[0070] In some embodiments, as shown in FIG3 , when the buck charging unit 12B detects that the cell voltage (corresponding to an example of the first voltage) of the battery cell 11 reaches the buck cutoff voltage (corresponding to an example of the first cutoff voltage), the buck charging unit 12B sends a first notification to the control module. After receiving the first notification, the control module determines that the current of the battery cell 11 sampled by the battery management module 32 has reached a preset cutoff current. The control module then determines that the battery cell 11 is in a charging complete state and controls the buck charging unit 12B to cut off the charging path of the battery cell 11, thereby stopping charging.

[0071] S502: The control module determines, based on the charging completion status of the battery cell, a target voltage sampled by the battery management module when the battery cell is in the charging completion status.

[0072] In some embodiments, when the battery cell 11 is in a charging completion state, the control module may determine the target voltage (corresponding to an instance of the second voltage) sampled by the battery management module 32 when the battery cell 11 is in a charging completion state based on the time when the charging completion state of the battery cell is determined.

[0073] S503: The control module adjusts the current buck cut-off voltage based on the magnitude relationship between the target voltage and the design voltage of the battery cell to obtain an adjusted cut-off voltage.

[0074] In some embodiments, after the control module determines the target voltage, the control module may dynamically adjust the current buck cutoff voltage based on the magnitude relationship between the target voltage and the design voltage of the battery cell 11 (corresponding to an example of the third voltage) to obtain an adjusted cutoff voltage (corresponding to an example of the second cutoff voltage). For example, when the voltage difference between the target voltage and the design voltage is less than 10mV (corresponding to an example of the first value), the adjusted cutoff voltage is equal to the current buck cutoff voltage; or, for example, when the voltage difference between the target voltage and the design voltage is greater than or equal to 10mV, the control module adjusts the current buck cutoff voltage by 10mV or 20mV.

[0075] In other embodiments, to improve adjustment accuracy, the control module may further determine whether the charging state of the mobile phone 100 during the charging process meets the target conditions when performing voltage adjustment. After determining that the charging state of the mobile phone 100 during the current charging process meets the target conditions, the control module may further determine a voltage difference based on the target voltage, the design voltage of the battery cell, and any voltage sampling error of the battery management module 32. Based on the voltage difference, the control module may determine the adjustment voltage to be adjusted to the current buck cutoff voltage. The specific dynamic adjustment process can be found in the description of FIG. 4 above and is not further described here.

[0076] S504: The control module uses the adjusted buck cut-off voltage as the judgment voltage of the buck charging unit in the next mobile phone charging process.

[0077] In some embodiments, the charging management module is typically deployed on the mainboard of the mobile phone. Compared to the battery management module deployed on the battery protection board, the distance between the charging management module and the battery cell (corresponding to an instance of the first distance) is typically greater than the distance between the battery management module and the battery cell (corresponding to an instance of the second distance). For example, as shown in FIG3 , the battery management module 32 deployed on the battery protection board 31 is closer to the battery cell 11 than the buck charging unit 12B deployed on the mainboard 300. This allows the battery management module 32 to avoid voltage sampling errors caused by the connection impedance between the mainboard 300 and the battery protection board 31 during charging and discharging of the battery cell 11, the connector fastening impedance, etc., thereby improving the sampling accuracy of the battery management module 32 and making the voltage sampling of the battery management module 32 closer to the actual battery cell voltage of the battery cell 11.

[0078] It can be understood that the control module adjusts the buck cutoff voltage during the next charging process of the mobile phone through the target voltage sampled by the battery management module with a smaller voltage sampling error each time the battery cell is in the charging complete state, so that the buck cutoff voltage during the next charging process of the mobile phone is closer to the design voltage of the battery cell, and then the voltage of the battery cell of the mobile phone can gradually approach the design voltage during the successive charging process, thereby ensuring the battery cell capacity utilization.

[0079] In other embodiments, the control module may further control the buck charging unit to recharge the battery cell based on the adjusted buck cutoff voltage. For example, when the control module determines that the voltage difference between the target voltage and the design voltage is greater than or equal to 10mV, the control module may control the buck charging unit to recharge the battery cell based on the adjusted buck cutoff voltage to improve the charging efficiency of the mobile phone during this charging process.

[0080] It is understood that in order to avoid the control module repeatedly adjusting the buck cutoff voltage during a single charging process of a mobile phone and the problem of charging overvoltage, when the control module determines that the voltage sampled by the battery management module during the charging process of the mobile phone has reached a preset value, it can directly control the buck charging unit to stop charging the battery cell to terminate charging. For example, during a single charging process, when the battery cell is in the first charging complete state, the control module determines that the voltage difference between the target voltage and the design voltage is 20mV. The control module then adjusts the current buck cutoff to adjust the buck cutoff voltage from 4480mV to 4450mV, and controls the buck charging unit to continue charging the battery cell based on the adjusted buck cutoff voltage of 4450mV. Subsequently, when the battery cell continues to charge, if the control module detects that the voltage sampled by the battery management module during the charging process of the mobile phone has reached a preset value, such as 4495mV, the control module can directly control the buck charging unit to stop charging the battery cell to terminate charging.

[0081] FIG6 shows a hardware structure diagram of another mobile phone 100 according to some embodiments of the present application.

[0082] As shown in Figure 6, the mobile phone 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal USB interface 130, a charging management module 140, a power management module 141, a battery module 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc.

[0083] The processor 110 may include one or more processing units. For example, the processor 110 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, etc. The different processing units may be independent devices or integrated into one or more processors.

[0084] The controller can be the nerve center and command center of the mobile phone 100. The controller can generate operation control signals based on instruction opcodes and timing signals to control instruction fetching and execution. The charging management method executed by the mobile phone 100 in the embodiment of the present application can be specifically executed by the processor 110.

[0085] In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, etc. It will be understood that the interface connection relationship between the modules illustrated in the embodiments of the present application is only a schematic illustration and does not constitute a structural limitation on the mobile phone 100.

[0086] The charging management module 140 is configured to receive charging input from a charger. The power management module 141 is configured to connect the battery module 142, the charging management module 140, and the processor 110. The power management module 141 receives input from the battery module 142 and / or the charging management module 140 to provide power to the processor 110, the internal memory 121, the external memory, the display 194, and the like.

[0087] In some embodiments, the battery module 142 includes a battery cell 11 and a battery protection board 31, on which a battery management module 32 is disposed. The functions of the battery management module 32 can be found in the descriptions of Figures 3, 4, and 5 above and are not described here in detail.

[0088] The wireless communication function of the mobile phone 100 can be implemented through the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.

[0089] Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Mobile communication module 150 can provide solutions for wireless communications, including 2G / 3G / 4G / 5G, applied to mobile phone 100. Wireless communication module 160 can provide solutions for wireless communications, including wireless local area networks (WLAN) (such as wireless fidelity (WiFi) networks), Bluetooth (BT), and global navigation satellite systems (GNSS), applied to mobile phone 100.

[0090] The mobile phone 100 implements the display function through the GPU, the display screen 194, and the application processor. The GPU is a microprocessor for image processing, which connects the display screen 194 and the application processor.

[0091] The display screen 194 is used to display images, videos, etc. The display screen 194 includes a display panel. In some embodiments, the mobile phone 100 may include one or N display screens 194, where N is a positive integer greater than one.

[0092] The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the mobile phone 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function.

[0093] The internal memory 121 can be used to store computer executable program codes, which include instructions. The processor 110 executes the instructions stored in the internal memory 121 to execute various functional applications and data processing of the mobile phone 100.

[0094] The mobile phone 100 can implement audio functions such as music playing and recording through the audio module 170 .

[0095] Buttons 190 include a power button, a volume button, and the like. Buttons 190 can be mechanical buttons or touch buttons. Motor 191 can generate vibration prompts. Indicator 192 can be an indicator light. SIM card interface 195 can be used to connect a SIM card.

[0096] It should be understood that the structure illustrated in this application does not constitute a specific limitation on the mobile phone 100. In other embodiments, the mobile phone 100 may include more or fewer components than shown, or may combine or separate certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0097] In some embodiments, the embodiments of the present application further provide a computer-readable medium, which stores program code. When the computer program code runs on a computer, the computer executes the methods in the above aspects.

[0098] In some embodiments, the embodiments of the present application further provide a computer program product, which includes: computer program code, which enables the computer to execute the methods in the above aspects when the computer program code is run on a computer.

[0099] In the accompanying drawings, some structural or method features may be shown in a particular arrangement and / or order. However, it should be understood that such a particular arrangement and / or order may not be required. Rather, in some embodiments, these features may be arranged in a manner and / or order different from that shown in the illustrative drawings. In addition, the inclusion of a structural or method feature in a particular figure does not imply that such feature is required in all embodiments, and in some embodiments, such features may not be included or may be combined with other features.

[0100] It should be noted that the units / modules mentioned in the various device embodiments of the present application are all logical units / modules. Physically, a logical unit / module can be a physical unit / module, or a part of a physical unit / module, or can be implemented as a combination of multiple physical units / modules. The physical implementation of these logical units / modules themselves is not the most important. The combination of functions implemented by these logical units / modules is the key to solving the technical problems raised by this application. In addition, in order to highlight the innovative part of this application, the above-mentioned device embodiments of this application do not introduce units / modules that are not closely related to solving the technical problems raised by this application. This does not mean that other units / modules do not exist in the above-mentioned device embodiments.

[0101] It should be noted that in the examples and description of this patent, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0102] While the present application has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present application.

Claims

1. A charging management method, applied to an electronic device, characterized in that The electronic device includes a charging management module, a battery management module, a battery module, and a control module. Among them, the battery module includes a battery cell and a battery protection board, and the battery management module is disposed on the battery protection board; During the charging process of the electronic device, corresponding to the first voltage of the battery cell detected by the charging management module and the first cut-off voltage satisfying a target difference relationship, it is determined that the battery cell is in a fully charged state; The control module determines the second voltage of the battery cell sampled by the battery management module when the battery cell is in the fully charged state; The control module adjusts the first cut-off voltage based on the magnitude relationship between the second voltage and a preset third voltage to obtain a second cut-off voltage, and uses the second cut-off voltage as the judgment voltage for the charging management module to detect whether the target difference relationship is satisfied next time.

2. The method according to claim 1, characterized in that, The control module adjusts the first cut-off voltage based on the magnitude relationship between the second voltage and a preset third voltage to obtain a second cut-off voltage, including: Corresponding to the control module determining that the charging state of the electronic device during the charging process satisfies a target condition, the control module adjusts the first cut-off voltage based on the magnitude relationship between the second voltage and the third voltage to obtain the second cut-off voltage.

3. The method according to claim 2, wherein The control module determining that the charging state of the electronic device during the charging process satisfies a target condition includes: Corresponding to the control module determining that the charging temperature and charging current of the electronic device are within a first target range, the charging state of the electronic device satisfies the target condition.

4. The method according to claim 1, characterized in that The control module adjusts the first cut-off voltage based on the magnitude relationship between the second voltage and a preset third voltage to obtain a second cut-off voltage, including: Corresponding to the difference between the second voltage and the third voltage being less than or equal to a first value, the second cut-off voltage is equal to the first cut-off voltage; Corresponding to the difference between the second voltage and the third voltage being greater than the first value, the second cut-off voltage is greater than the first cut-off voltage.

5. The method according to claim 1, wherein The corresponding determination that the battery cell is in a fully charged state when the charging management module detects that the first voltage of the battery cell and the first cut-off voltage satisfy a target difference relationship includes: Corresponding to the absolute value of the difference between the first voltage detected by the charging management module and the first cut-off voltage being within a first value range, the first voltage and the first cut-off voltage satisfy the target difference relationship.

6. The method according to claim 1, characterized in that The corresponding determination that the battery cell is in a fully charged state when the charging management module detects that the first voltage of the battery cell and the first cut-off voltage satisfy a target difference relationship includes: Corresponding to the charging management module detecting that the first voltage and the first cut-off voltage satisfy a target difference relationship, the charging management module sends a first notification to the control module; Based on the first notification and a first condition that determines that the first current of the battery cell sampled by the battery management module is within a first current range, the control module determines that the battery cell is in a fully charged state.

7. According to the method described in any one of claims 1 to 6, characterized in that, It further includes: The charging management module is disposed on the main board of the electronic device, and a first distance between the charging management module and the battery cell is greater than a second distance between the battery management module and the battery cell.

8. The method according to any one of claims 1 to 6, characterized in that The third voltage includes: the designed voltage of the battery cell; The charging management module includes: a buck charging management unit; The first cut-off voltage and / or the second cut-off voltage is: a buck cut-off voltage.

9. A computer-readable storage medium, characterized in that, Instructions are stored on the readable storage medium, and when executed on the electronic device, the instructions cause the electronic device to implement the method according to any one of claims 1 to 8.

10. An electronic device, characterized in that, Comprising: a memory for storing instructions executed by one or more processors of the electronic device; and a processor, which is one of the processors of the electronic device, for executing the instructions stored in the memory to implement the method according to any one of claims 1 to 8.

11. A program product, characterized in that, The program product includes instructions, and when executed on the electronic device, the instructions cause the electronic device to implement the method according to any one of claims 1 to 8.

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