WO2020223903A1 - 充电电流控制方法、电子设备和电源提供装置 - Google Patents

充电电流控制方法、电子设备和电源提供装置 Download PDF

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Publication number
WO2020223903A1
WO2020223903A1 PCT/CN2019/085875 CN2019085875W WO2020223903A1 WO 2020223903 A1 WO2020223903 A1 WO 2020223903A1 CN 2019085875 W CN2019085875 W CN 2019085875W WO 2020223903 A1 WO2020223903 A1 WO 2020223903A1
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WIPO (PCT)
Prior art keywords
impedance
power supply
supply device
battery
main board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/085875
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English (en)
French (fr)
Inventor
刘绍斌
卜昌军
田晨
史岩松
李家达
张俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to PCT/CN2019/085875 priority Critical patent/WO2020223903A1/zh
Priority to CN201980094087.4A priority patent/CN113574762B/zh
Priority to EP19927984.5A priority patent/EP3968487B1/en
Publication of WO2020223903A1 publication Critical patent/WO2020223903A1/zh
Priority to US17/519,932 priority patent/US20220060034A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08—Measuring resistance by measuring both voltage and current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
    • H02J7/443—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data using passive battery identification means, e.g. resistors or capacitors
    • H02J7/445—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data using passive battery identification means, e.g. resistors or capacitors in response to measured battery parameters, e.g. voltage, current or temperature profile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
    • H02J7/42—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data with electronic devices having internal batteries, e.g. mobile phones
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
    • H02J7/44—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data between battery management systems and power sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/933—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/94—Regulation of charging or discharging current or voltage in response to battery current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/96—Regulation of charging or discharging current or voltage in response to battery voltage

Definitions

  • the embodiments of the present application relate to the field of charging technology, and more specifically, to a charging current control method, electronic equipment, and power supply device.
  • the fast charging technology generally uses a large current method or a high voltage fast charging method.
  • the fast charging technology is used to charge electronic devices, as the charging process progresses, after the motherboard has been used for a period of time, its impedance will increase, so that the impedance of the entire charging loop will increase. If you continue to use fast charging technology to charge electronic devices, it will cause abnormal heating of some local devices on the charging circuit, causing serious burnout.
  • the overall charging path impedance can be controlled, that is, the charging current value of the charging circuit can be adjusted according to the overall charging path impedance value.
  • the motherboard can actually withstand higher currents. In this case, adjusting the fast charging current or exiting the fast charging mode will cause the charging speed to decrease and the charging time is too long.
  • the embodiments of the present application provide a charging current control method, an electronic device, and a power supply device to solve the charging problem in related technologies.
  • a charging current control method is provided.
  • the method is used in an electronic device.
  • the electronic device includes a battery, a main board, and a charging interface.
  • the input end of the main board is connected to the output end of the charging interface.
  • the output terminal of the main board is connected to the input terminal of the battery, and the method includes: in the process of charging the battery, the electronic device determines a target impedance, the target impedance includes a first impedance and a second impedance,
  • the first impedance is the impedance between the output terminal of the power supply device and the input terminal of the main board
  • the second impedance is the impedance between the output terminal of the main board and the input terminal of the battery
  • the target The impedance is less than the total impedance between the output terminal of the power supply device and the input terminal of the battery; the electronic device sends instruction information to the power supply device, and the instruction information instructs the power supply device according to the The target impedance adjusts the output current of the power supply
  • the output current of the power supply device is determined by the management of the target impedance in the charging loop. Since the determined target impedance does not include the impedance of the motherboard or includes part of the impedance of the motherboard, The influence of the impedance of the main board on the adjustment of the output current of the power supply device can be avoided or reduced, so that the adjustment of the output current of the power supply device can be delayed. Compared with determining the charging current according to the impedance of the charging circuit in the prior art, the solution provided in the present application can avoid blindly adjusting the fast charging current or exiting the fast charging mode due to the increase in the impedance of the motherboard.
  • the increase in the impedance of the charging circuit is not caused by the impedance of the motherboard, so that blindness due to the increase in the impedance of the motherboard can be avoided. Adjust the fast charge flow or exit the fast charge mode.
  • the charging current control method when determining the target impedance, compared with completely ignoring the impedance of the motherboard, since the determined target impedance includes part of the impedance of the motherboard, it can avoid that the impedance of the motherboard continues to increase rapidly. Consider the serious heating of the motherboard or even the motherboard burnout caused by the impedance of the motherboard.
  • the method before the electronic device determines the target impedance, the method further includes: determining the impedance between the input terminal and the output terminal of the main board; and the determining the target
  • the charging current control method provided by the embodiments of the present application determines different target impedances according to the impedance of the main board, which can better manage the impedance of the main board, and can avoid the increase in the impedance of the charging circuit other than the main board.
  • the problem of not being able to adjust the current in time can also avoid the continuous and rapid increase of the impedance of the motherboard without considering the problem of serious heating or even burning of the motherboard caused by the impedance of the motherboard.
  • an electronic device including: a main board, an input end of the main board is connected to an output end of a charging interface, and an output end of the main board is connected to an input end of a battery; a controller, configured to perform the following operations: In the process of charging the battery, the electronic device determines a target impedance, the target impedance includes a first impedance and a second impedance, and the first impedance is the output terminal of the power supply device and the input terminal of the motherboard
  • the second impedance is the impedance between the output terminal of the main board and the input terminal of the battery, and the target impedance is smaller than the difference between the output terminal of the power supply device and the input terminal of the battery
  • the electronic device sends instruction information to the power supply device, the instruction information instructs the power supply device to adjust the output current of the power supply device according to the target impedance.
  • the electronic device provided by the embodiment of the present application can avoid blindly adjusting the fast charging current or exiting the fast charging mode due to the increase in the impedance of the motherboard by executing the charging current control method of any one of the embodiments in the first aspect.
  • a charging current control method is provided.
  • the method is used in an electronic device.
  • the electronic device includes a battery, a main board, and a charging interface.
  • the input end of the main board is connected to the output end of the charging interface.
  • the output end of the main board is connected to the input end of the battery, and the method includes: in the process of charging the battery, the electronic device determines the voltage V1 of the input end of the battery and the input and output of the main board
  • the electronic device determines the feedback voltage V according to the voltage V1 of the input terminal of the battery and the voltage difference ⁇ V between the input terminal and the output terminal of the motherboard, wherein the feedback voltage V satisfies: V1 ⁇ V ⁇ (V1+ ⁇ V); the electronic device sends the feedback voltage to the power supply device so that the power supply device adjusts the output current of the power supply device according to the feedback voltage.
  • the charging current control method provided by the embodiment of the present application sends a feedback voltage for calculating the target impedance to the power supply device through an electronic device, so that the power supply device can determine the output current of the power supply device according to the received feedback voltage, because V1 ⁇ V ⁇ (V1+ ⁇ V), so the feedback voltage V is the voltage that does not include the motherboard or includes part of the motherboard voltage. Therefore, the target impedance determined by the power supply device can be made to not include the motherboard impedance or include part of the motherboard impedance. The influence of the impedance of the main board on the adjustment of the current can be avoided or reduced, so that the adjustment of the charging current can be delayed.
  • the feedback voltage sent to the power supply device is different according to the impedance of the main board, so that the power supply device determines the output current according to the feedback voltage, which can avoid the increase in the impedance of the charging circuit except the main board.
  • an electronic device including: a main board, an input end of the main board is connected to an output end of a charging interface, and an output end of the main board is connected to an input end of a battery; a controller configured to perform the following operations: In the process of charging the battery, the electronic device determines the voltage V1 of the input terminal of the battery and the voltage difference ⁇ V between the input terminal and the output terminal of the main board; according to the voltage V1 of the input terminal of the battery and the main board The voltage difference ⁇ V between the input terminal and the output terminal is determined to determine the feedback voltage V, where the feedback voltage V satisfies: V1 ⁇ V ⁇ (V1+ ⁇ V); the electronic device sends the feedback voltage to the power supply device, So that the power supply device adjusts the output current of the power supply device according to the feedback voltage.
  • the electronic device provided by the embodiments of the present application can avoid blindly adjusting the fast charging current or exiting the fast charging mode due to the increase in the impedance of the motherboard by executing the charging current control method of any one of the embodiments in the third aspect.
  • a charging current control method is provided.
  • the method is used in an electronic device.
  • the electronic device includes a battery, a main board, and a charging interface.
  • the input end of the main board is connected to the output end of the charging interface.
  • the output terminal of the main board is connected to the input terminal of the battery, and the method includes: receiving a target impedance determined by an electronic device, the target impedance includes a first impedance and a second impedance, and the first impedance is the output of the power supply device
  • the impedance between the terminal and the input terminal of the main board, the second impedance is the impedance between the output terminal of the main board and the input terminal of the battery, and the target impedance is smaller than the output terminal of the power supply device
  • the total impedance between the input terminal of the battery adjust the output current of the power supply device according to the target impedance.
  • a power supply device is provided.
  • the power supply device is used to charge a battery of an electronic device.
  • the electronic device includes a battery, a motherboard, and a charging interface.
  • the input terminal of the motherboard and the output of the charging interface The output terminal of the main board is connected to the input terminal of the battery, and the power supply device includes: an output circuit for providing output current to the electronic device; a controller for receiving a target determined by the electronic device Impedance, the target impedance includes a first impedance and a second impedance, the first impedance is the impedance between the output terminal of the power supply device and the input terminal of the main board, and the second impedance is the main board
  • the impedance between the output terminal and the input terminal of the battery, the target impedance is less than the total impedance between the output terminal of the power supply device and the input terminal of the battery; adjust the power source according to the target impedance Provide the output current of the device.
  • a charging current control method is provided.
  • the method is used in an electronic device.
  • the electronic device includes a battery, a main board, and a charging interface.
  • the input end of the main board is connected to the output end of the charging interface.
  • the output terminal of the main board is connected to the input terminal of the battery, and the method includes: receiving a feedback voltage V determined by the electronic device, the feedback voltage V satisfies: V1 ⁇ V ⁇ (V1+ ⁇ V), where V1 represents The voltage at the input terminal of the battery, ⁇ V represents the voltage difference between the input terminal and the output terminal of the main board; the output current of the power supply device is adjusted according to the feedback voltage.
  • a power supply device is provided.
  • the power supply device is used to charge a battery of an electronic device.
  • the electronic device includes a battery, a motherboard, and a charging interface.
  • the input of the motherboard and the output of the charging interface are The output terminal of the main board is connected to the input terminal of the battery, and the power supply device includes: an output circuit for providing output current to the electronic device; a controller for receiving the determination of the electronic device
  • the feedback voltage V satisfies: V1 ⁇ V ⁇ (V1+ ⁇ V), where V1 represents the voltage at the input terminal of the battery, and ⁇ V represents the voltage difference between the input terminal and the output terminal of the motherboard;
  • the feedback voltage adjusts the output current of the power supply device.
  • a computer-readable storage medium is provided, and computer-executable instructions are stored, and the computer-executable instructions are configured to execute any of the above-mentioned charging current control methods.
  • a computer program product includes a computer program stored on a computer-readable storage medium.
  • the computer program includes program instructions that, when executed by a computer, cause the The computer executes the charging current control method described above.
  • Fig. 1 is a schematic diagram of a charging circuit provided by an embodiment of the present application
  • FIG. 2 is a schematic flowchart of a charging current control method provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a voltage collection principle provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a charging current control method provided by another embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a charging current control method provided by another embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a charging current control method provided by still another embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a charging current control method provided by still another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a power supply device provided by an embodiment of the present application.
  • 11 is a schematic flowchart of a charging current control method provided by still another embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a power supply device provided by another embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a wired charging system provided by an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a wired charging system provided by another embodiment of the present application.
  • Fig. 1 is a schematic diagram of fast charging using an embodiment of the present application.
  • the schematic diagram of fast charging includes: a battery, a fast charging path, a universal serial bus interface (USB interface), a data cable, and an adapter.
  • USB interface universal serial bus interface
  • the mobile phone is equipped with a battery and a fast path, and the adapter is connected to the mobile phone through a USB interface.
  • the USB interface can be a Micro USB interface or a Type-c USB interface.
  • the data line in the USB interface is used for two-way communication between the adapter and the mobile phone.
  • the data line can be the D+ line and/or D- line in the USB interface.
  • the so-called two-way communication can refer to the exchange of information between the adapter and the mobile phone.
  • the adapter in the embodiment of the present application supports normal charging mode and fast charging mode, wherein the charging current of the fast charging mode is greater than the charging current of the normal charging mode or the charging voltage of the fast charging mode is higher than the charging voltage of the normal charging mode (or fast charging The charging speed of the mode is greater than that of the normal charging mode).
  • the normal charging mode means that the power supply device outputs a relatively small current value (usually less than 2.5A) or uses a relatively small power (usually less than 15W) to charge the battery in the charging equipment. It usually takes several hours to fully charge a larger capacity battery (such as a 3000 mAh battery) in the mode; while in the fast charging mode, the power supply device can output a relatively large current, ( Usually greater than 2.5A, such as 4.5A, 5A or even higher) or relatively large power (usually greater than or equal to 15W) to charge the battery in the charging device, compared to the normal charging mode, the power supply device In the fast charging mode, the charging time required to fully charge the battery of the same capacity can be significantly shortened and the charging speed is faster. In the embodiment of the present application, the fast charging mode can also be divided into multiple fast charging stages according to different impedances, wherein as the impedance increases, the current in the fast charging stage shows a decreasing trend.
  • the mobile phone terminal sends the battery voltage V1 near the power terminal to the power supply device through the D+ and D- signals on the data line on the data line in real time.
  • the specific impedance control method can be as shown in Table 1:
  • the current I1 is used for fast charging; when the impedance increases to satisfy R1 ⁇ R ⁇ R2, the current of the charging circuit is controlled to decrease to I2 for fast charging (I2 ⁇ I1); if the impedance continues Increase to meet R2 ⁇ R ⁇ R3, control the current of the charging loop to decrease to I3 for fast charging (I3 ⁇ I2); if the impedance continues to increase to meet R>R3, exit the fast charging mode, and use the normal charging mode to charge the phone Recharge.
  • the power supply device continuously adjusts the charging current value in the fast charging mode according to changes in the impedance of the charging circuit until the fast charging mode is exited.
  • the motherboard is used for a period of time, its impedance will increase, so that the impedance of the entire charging circuit will increase.
  • the charging current will be controlled to decrease, but in fact the motherboard can withstand more Of the current.
  • the embodiments of the present application provide the following solutions, which can avoid blindly adjusting the fast charging current or exiting the fast charging mode due to the increase in the impedance of the motherboard.
  • the charging current control method 200 provided by the embodiment of the present application may include steps 210-220.
  • the electronic device determines a target impedance, the target impedance includes a first impedance and a second impedance, and the first impedance is the output terminal of the power supply device and the The impedance between the input terminals of the motherboard, the second impedance is the impedance between the output terminal of the motherboard and the input terminal of the battery, and the target impedance is smaller than the output terminal of the power supply device and the battery The total impedance between the input terminals.
  • the impedance on the main board is related to the charging scheme adopted by the electronic device, which is not limited in the embodiment of the present application.
  • the electronic device uses a direct charging solution to charge the battery, and the main board may include one or more switching devices (for example, MOS transistors).
  • the impedance of the main board may refer to the impedance of the one or more switching devices.
  • the electronic device may use a common charging scheme to charge the battery, and the main board may include circuit devices such as a step-down circuit and a voltage stabilization circuit.
  • the impedance of the main board may refer to the impedance of the circuit components such as the step-down circuit and the voltage stabilization circuit.
  • the target impedance in the embodiment of the present application may be an impedance that does not include the main board, or may be a partial impedance that includes the main board.
  • the target impedance may include all or part of the impedance of the charging circuit except the motherboard.
  • it may include the impedance of the USB interface and the data line, or it may only include the USB interface or data.
  • the impedance of the line; when the target impedance includes part of the impedance of the motherboard, the target impedance may also include all or part of the impedance of the charging circuit except the motherboard.
  • it may include the impedance of the USB interface and the data line, or it may only include The impedance of the USB interface or the data line is not specifically limited in this application.
  • the first impedance may be all or part of the impedance between the output terminal of the power supply device and the input terminal of the main board.
  • the first impedance in the embodiment of the present application may be Including the impedance of the USB interface and/or data line.
  • the first impedance may be all or part of the impedance between the input terminal of the charging interface of the electronic device and the input terminal of the main board.
  • the first impedance in the embodiment of the present application The impedance may include the impedance of the USB interface.
  • the output voltage of the power supply device is equal to the input voltage of the charging interface of the electronic device.
  • the output voltage of the power supply device and the input terminal of the motherboard The impedance is also equal to the impedance between the input terminal of the charging interface of the electronic device and the input terminal of the motherboard.
  • the charging circuit includes a battery, a main board, a USB interface, a data cable, and a power supply device.
  • the impedance of the charging circuit is the ratio of the difference between the output voltage of the power supply device to the input voltage of the battery and the charging current.
  • the power supply device in the embodiment of the present application can be understood as the aforementioned adapter, which charges electronic equipment.
  • the electronic device sends instruction information to the power supply device, the instruction information instructs the power supply device to adjust the output current of the power supply device according to the target impedance.
  • the electronic device may send the target impedance to the power supply device, and the power supply device determines the output current of the power supply device according to the target impedance and the corresponding relationship between the impedance and the current.
  • the instruction information in the embodiment of the present application may be text information, or may also be a signal instruction, which is not specifically limited in the present application.
  • the charging current control method is managed by the electronic device.
  • the electronic device determines the target impedance
  • the target impedance is sent to the power supply device, and the power supply device is based on the target impedance and the impedance and current The corresponding relationship determines the output current of the power supply device; in another embodiment, the electronic device determines the target impedance and determines the output current of the power supply device according to the corresponding relationship between impedance and current, and then the electronic device sends the determined current To the power supply device, so that the power supply device can adjust the output current of the power supply device according to the received current.
  • the output current of the power supply device is determined by the management of the target impedance in the charging loop. Since the determined target impedance does not include the impedance of the motherboard or includes part of the impedance of the motherboard, Avoid or reduce the influence of the impedance of the main board on the adjustment of the output current of the power supply device, so that the adjustment of the output current of the power supply device can be delayed. Compared with determining the output current of the power supply device according to the impedance of the charging circuit in the prior art, the solution provided by the present application can avoid blindly adjusting the fast charging current or exiting the fast charging mode due to the increase of the impedance of the main board.
  • the process of charging with the current I1 is called the first charging stage
  • the process of charging with the current I2 is called the second charging stage
  • the process of charging with the current I3 is called the third charging stage.
  • the output current of the power supply device may be adjusted or not adjusted. For example, if the electronic device is charged with the current I1 of the first charging stage, as the charging continues, when the determined impedance is still in the first charging stage, the power supply device will not adjust the current at this time and still use the first charging stage.
  • the current I1 in the charging stage charges the electronic device; when the determined impedance is in the second charging stage, the power supply device will adjust the current to I2 to charge the electronic device.
  • the determined target impedance includes the charging circuit except the motherboard
  • the impedance or part of the impedance of other devices may include the impedance of the data line, the impedance of the USB interface, and so on.
  • V1 is sent to the power supply device.
  • the output current of the power supply device is adjusted according to the difference in impedance R.
  • the specific control method for impedance in the embodiment of the present application may be as shown in Table 2.
  • the impedance R [V0-(V1+ ⁇ V)]/I
  • the impedance R calculated according to the method of the embodiment of the present application is smaller than the impedance R calculated in the prior art.
  • different charging currents may be adjusted to charge the mobile phone.
  • the mobile phone is charged with a charging current of 4A.
  • the initial impedance of the entire charging loop (including the motherboard, USB interface, and data cable) is 100m ⁇ , and the impedance of the motherboard is 50m ⁇ .
  • the output current of the power supply device is adjusted in the prior art at this time, and may be adjusted to 2.5A, that is, the second charging stage.
  • the impedance of the main board may be 130m ⁇ .
  • the target impedance R calculated in the embodiment of this application is 70m ⁇ , which corresponds to the table 2. If the value of R'1 is 100m ⁇ , according to the method in the embodiment of the present application, the mobile phone can still be charged with the current of the first charging stage, that is, the mobile phone can be charged with a 4A charging current. Avoid blindly adjusting the fast charging current due to the increase in the impedance of the motherboard.
  • the values of R'1, R'2, and R'3 in Table 2 can be obtained based on experience or multiple debugging, but it should be noted that the values of R'1, R'2, and R'3 The values should be smaller than the values of R1, R2, and R3 respectively, that is, R'1 ⁇ R1, R'2 ⁇ R2, R'3 ⁇ R3.
  • R'1, R'2, and R'3 in the embodiments of the present application may be equal or unequal, which is not specifically limited in the present application.
  • the increase in the impedance of the charging circuit is not caused by the impedance of the motherboard, which can avoid the increase in the impedance of the motherboard. And blindly adjust the fast charge flow or exit the fast charge mode.
  • the partial impedance of the motherboard should be considered when determining the target impedance.
  • the determined target impedance is greater than the target impedance determined when the motherboard is completely disregarded.
  • the embodiment of the present application can switch the current in time, and can avoid the motherboard's failure due to the continuous and rapid increase in the impedance of the motherboard. A serious problem with fever.
  • R" in the embodiment of the present application can be an empirical value or a test value, which is not specifically limited in this application.
  • R" in the embodiment of the present application can be less than the initial impedance between the input terminal and the output terminal of the main board. It can also be smaller than the impedance measured in real time between the input terminal and the output terminal of the main board.
  • the charging current control method when determining the target impedance, compared with completely ignoring the impedance of the motherboard, since the determined target impedance includes part of the impedance of the motherboard, it can be avoided that the impedance of the motherboard continues to be fast.
  • the ground increases without considering the serious heating of the motherboard or even the motherboard burnout caused by the impedance of the motherboard.
  • the analog-to-digital converter (ADC) pins of a microcontroller unit can be used to collect the voltages V2 and V3.
  • MCU is also called Single Chip Microcomputer (SCM) or single chip microcomputer. It appropriately reduces the frequency and specifications of the Central Processing Unit (CPU) and reduces the memory (memory). , Counter (Timer), USB, A/D conversion, UART, PLC, DMA and other peripheral interfaces, and even LCD drive circuit are integrated on a single chip to form a chip-level computer, which can be controlled in different combinations for different applications.
  • SCM Single Chip Microcomputer
  • Fig. 3 is a schematic diagram of ADC acquisition.
  • the motherboard in the mobile phone is controlled by the MCU, so the output voltage V2 of the motherboard can be collected through the measurement of the MCU on the ADC pin.
  • V collection [R10/(R10+R20)]*V2
  • the input voltage V3 of the main board can also be collected in the same way, or can be collected in other ways, which is not specifically limited in this application.
  • the impedance of the motherboard can be managed separately, that is, when the target impedance is determined, the impedance of the motherboard or part of the impedance of the motherboard is not included, so as to avoid blindly adjusting the fast charge flow due to the increase in the impedance of the motherboard. Or exit the fast charging mode.
  • the target impedance can be determined according to the impedance of the main board. It will be introduced in detail below.
  • the method 200 may further include step 230.
  • the preset threshold R′ in the embodiment of the present application may be an empirical value, or may be obtained through debugging, which is not specifically limited in the present application.
  • the input voltage V3 and output voltage V2 of the main board can be collected through the ADC pin, and the charging current I can be obtained from the fuel gauge of the mobile phone battery.
  • the target impedance is determined according to the difference in impedance between the input and output of the motherboard.
  • R" in the embodiment of the present application may be equal to the preset threshold R′, or may be less than the preset threshold R′, which is not specifically limited in the present application.
  • the preset threshold R' is 100m ⁇
  • the mobile phone is charged with a 4A charging current
  • the initial impedance of the charging loop is 100m ⁇
  • the input and output of the main board The impedance between the terminals is 50m ⁇ .
  • the impedance between the input and output of the motherboard increases to 80m ⁇ (the impedance between the input and output of the motherboard is less than the preset threshold of 100), and the charging circuit other than the motherboard The impedance increases to 130m ⁇ .
  • the preset threshold R' is 100, taking a mobile phone as an example, when the mobile phone is initially charged, the mobile phone is charged with a charging current of 4A.
  • the initial impedance of the charging loop is 100m ⁇ , and the input terminal and output terminal of the motherboard are between The impedance is 50m ⁇ .
  • the impedance between the input and output of the motherboard increases to 80m ⁇ (the impedance between the input and output of the motherboard at this time is less than the preset threshold), and the charging circuit other than the motherboard
  • the power supply device will not adjust the charging current and still charge the mobile phone with a 4A charging current (in actual situations, between the input and output of the motherboard
  • the power supply device should adjust the charging current), which may cause the impedance of the charging circuit other than the motherboard to increase The problem of not being able to adjust the current in time.
  • the charging current during the charging process should be determined according to the impedance of the charging circuit, which can avoid the increase of the impedance of the charging circuit other than the main board. The problem that the current cannot be adjusted in time.
  • different target impedances are determined according to the impedances between the input and output terminals of the main board, so that the impedance of the main board can be better distinguished and managed, and the
  • the impedance of the charging circuit increases, the current cannot be adjusted in time, and at the same time, it can avoid the problem of the motherboard's continuous and rapid increase in impedance without considering the motherboard's impedance, which causes the motherboard to cause serious heating and even the motherboard to burn.
  • the impedance between the input terminal and the output terminal of the main board when the impedance between the input terminal and the output terminal of the main board is greater than the preset threshold R', it can be adjusted according to the correspondence relationship shown in Table 1, or according to the correspondence relationship shown in Table 3. The relationship is adjusted.
  • the corresponding relationship between the impedance and the current can be determined according to the corresponding relationship shown in Table 1.
  • the initial impedance of the charging loop is 100m ⁇
  • the impedance between the input and output terminals of the main board is 50m ⁇ .
  • the charging current will be adjusted at this time, and may be adjusted to 2.5A, that is, the second charging stage is entered.
  • the corresponding relationship between the impedance and the current can be determined according to the corresponding relationship shown in Table 1.
  • the 4A charging The current charges the mobile phone, the initial impedance of the charging loop is 100m ⁇ , and the impedance between the input terminal and the output terminal of the motherboard is 50m ⁇ .
  • the impedance of the charging circuit increases to 500m ⁇ .
  • the impedance of the charging circuit can be adjusted to obtain the target impedance, and then the charging current can be adjusted according to the target impedance.
  • the target impedance in the embodiment of the present application is equivalent to reducing R′′.
  • R3 in Table 1 is 500m ⁇
  • the prior art will prepare to adjust the current to exit the fast charging mode; Due to the adjustment of the target impedance in the application embodiment, the charging current may not be changed.
  • the power supply device will not adjust the current, but still charge the mobile phone with the current charging current I3. Therefore, compared with the prior art, the target impedance is managed to expand the impedance control range.
  • the corresponding relationship between the impedance and the current can also be determined according to the corresponding relationship shown in Table 3.
  • the mobile phone is charged with a 4A charging current
  • the initial impedance of the charging circuit is 100m ⁇
  • the impedance between the input terminal and the output terminal of the main board is 50m ⁇ .
  • the impedance of the charging loop increases to 500m ⁇ .
  • the power supply device will not adjust the charging current, or will continue to charge the mobile phone with the current charging current I3. It will blindly exit the fast charging mode, further expanding the impedance control range.
  • R0 in the embodiment of the present application may be an empirical value or a test value, which is not specifically limited in the present application.
  • An embodiment of the present application also provides an electronic device 500, as shown in FIG. 5, including a main board 510 and a controller 520.
  • the main board 510 the input end of the main board 510 is connected to the output end of the charging interface, and the output end of the main board 510 is connected to the input end of the battery.
  • the charging interface in the embodiment of the present application may be a USB dock interface or a charging interface of a power supply device.
  • the main board 510 may be separately located inside the electronic device, or integrated with the controller and located inside the electronic device, which is not specifically limited in this application.
  • the controller 520 is configured to perform the following operations: in the process of charging the battery, the electronic device determines a target impedance, the target impedance includes a first impedance and a second impedance, and the first impedance provides the power source
  • the electronic device sends instruction information to the power supply device, the instruction information instructs the power supply device to adjust the power supply device according to the target impedance The output current.
  • the electronic device 500 determines the output current of the power supply device through the determined target impedance, and feeds the current back to the power supply device.
  • the power supply device outputs the power supply device during the charging process according to the current fed back by the electronic device.
  • the current is adjusted; or the electronic device 500 can send the calculated target impedance to the power supply device, and the power supply device determines the output current of the power supply device during the charging process and adjusts it according to the target impedance and the corresponding relationship between the impedance and the charging current .
  • the power supply device can also send information to the electronic device to inquire whether the current charging current of the electronic device is suitable. After the electronic device receives the information, it can reply to the power supply device that the current current is suitable, high or low, and the power supply is provided. The device makes further adjustments to the charging current according to the received response information to improve the safety during the charging process.
  • the electronic device 500 provided by the embodiment of the present application by executing the charging current control method 200, can avoid blindly adjusting the fast charging current or exiting the fast charging mode due to the increase in the impedance of the motherboard.
  • the above describes the management of the target impedance in the charging circuit, and the output current of the power supply device can be determined by the electronic device according to the determined target impedance.
  • the following will describe the determination of the feedback voltage sent to the power supply device by the electronic device, so that the power supply device can determine the output current of the power supply device according to the received feedback voltage.
  • an embodiment of the present application also provides a charging current control method 600, which may include steps 610-630.
  • the electronic device sends the feedback voltage to the power supply device, so that the power supply device adjusts the output current of the power supply device according to the feedback voltage.
  • the electronic device first determines the feedback voltage according to the voltage V1 at the input terminal of the battery and the voltage difference ⁇ V between the input terminal and the output terminal of the main board, where the feedback voltage satisfies: V1 ⁇ V ⁇ (V1+ ⁇ V), the electronic device provides the feedback voltage to the power supply device, so that the power supply device determines the output current of the power supply device according to the feedback voltage provided by the electronic device.
  • the power supply device after the power supply device receives the feedback voltage sent by the electronic device, the power supply device obtains the target impedance according to the feedback voltage and the charging current, and then determines the output current of the power supply device based on the corresponding relationship between the impedance and the current.
  • the relationship satisfied by the feedback voltage can avoid blindly adjusting the fast charging flow or exiting the fast charging mode due to the increase in the impedance of the motherboard, and on the other hand, it can avoid the continuous and rapid increase of the impedance of the motherboard. A serious problem with the heating of the motherboard.
  • the charging current control method provided by the embodiments of the present application sends a feedback voltage for determining the target impedance to the power supply device through an electronic device, so that the power supply device can determine the output current of the power supply device according to the received feedback voltage, because V1 ⁇ V ⁇ (V1+ ⁇ V), so the feedback voltage V is the voltage that does not include the motherboard or includes part of the motherboard voltage. Therefore, the target impedance determined by the power supply device can be made to not include the motherboard impedance or include part of the motherboard impedance. The influence of the impedance of the main board on the adjustment of the current can be avoided or reduced, so that the adjustment of the charging current can be delayed.
  • the feedback voltage determined by the electronic device may be fed back to the power supply device through the management module on the electronic device.
  • R" in the embodiment of the present application can be an empirical value or a test value, which is not specifically limited in this application.
  • R" in the embodiment of the present application can be less than the initial impedance between the input terminal and the output terminal of the main board. It can also be smaller than the impedance measured in real time between the input terminal and the output terminal of the main board.
  • the charging current control method 600 may further include step 640.
  • the preset threshold in the embodiment of the present application may be an empirical value, or may be obtained through debugging, which is not specifically limited by who applies.
  • the feedback voltage sent to the power supply device is also different according to the impedance of the motherboard, so that the power supply device determines the output current of the power supply device according to the feedback voltage, which can avoid the problem of charging circuits other than the motherboard.
  • the impedance increases, the current cannot be adjusted in time, and at the same time, it can avoid the serious heating and even the burning of the motherboard due to the continuous and rapid increase of the impedance of the motherboard without considering the impedance of the motherboard.
  • An embodiment of the present application also provides an electronic device 800, as shown in FIG. 8, including a main board 810 and a controller 820.
  • Main board 810 the input end of the main board is connected to the output end of the charging interface, and the output end of the main board is connected to the input end of the battery.
  • the controller 820 is configured to perform the following operations: in the process of charging the battery, the electronic device determines the voltage V1 at the input terminal of the battery and the voltage difference ⁇ V between the input terminal and the output terminal of the motherboard; The voltage V1 of the input terminal of the battery and the voltage difference ⁇ V between the input terminal and the output terminal of the main board are used to determine the feedback voltage V, where the feedback voltage V satisfies: V1 ⁇ V ⁇ (V1+ ⁇ V); The power supply device sends the feedback voltage so that the power supply device adjusts the output current of the power supply device according to the feedback voltage.
  • the electronic device in the embodiments of the present application may be a mobile phone, a pad, or other electronic devices with fast charging performance, which is not specifically limited in the embodiments of the present application.
  • the electronic device 800 provided by the embodiment of the present application by executing the charging current control method 600, can avoid blindly adjusting the fast charging current or exiting the fast charging mode due to the increase in the impedance of the motherboard.
  • an embodiment of the present application provides a charging current control method 900, and the method 900 may include steps 910-920.
  • a target impedance determined by an electronic device where the target impedance includes a first impedance and a second impedance, and the first impedance is the impedance between the output terminal of the power supply device and the input terminal of the motherboard, and The second impedance is the impedance between the output terminal of the main board and the input terminal of the battery, and the target impedance is smaller than the total impedance between the output terminal of the power supply device and the input terminal of the battery.
  • the target impedance R (V0-(V1+I*R′′))/I, where V0 represents the input voltage of the power supply device, and V1 represents the input voltage of the battery Voltage, I represents the output current provided by the power supply device, and R′′ is a fixed value or determined based on the impedance between the input terminal and the output terminal of the motherboard.
  • An embodiment of the present application also provides a power supply device 1000.
  • the power supply device 1000 includes an output circuit 1010 and a controller 1020.
  • the output circuit 1010 is used to provide output current to the electronic device.
  • the controller 1020 is configured to receive a target impedance determined by an electronic device, the target impedance includes a first impedance and a second impedance, and the first impedance is the output terminal of the power supply device and the main board
  • the second impedance is the impedance between the output terminal of the motherboard and the input terminal of the battery, and the target impedance is smaller than the impedance between the output terminal of the power supply device and the battery
  • the total impedance between the input terminals; the output current of the power supply device is adjusted according to the target impedance.
  • the target impedance R (V0-(V1+I*R′′))/I, where V0 represents the input voltage of the power supply device, and V1 represents the input voltage of the battery Voltage, I represents the output current provided by the power supply device, and R′′ is a fixed value or determined based on the impedance between the input terminal and the output terminal of the motherboard.
  • the embodiment of the present application provides a charging current control method 1100. As shown in FIG. 11, the method 1100 may include steps 1110-1120.
  • the feedback voltage V V1+ ⁇ V.
  • the feedback voltage V V1+I*R", where I represents the output current provided by the power supply device, and R" is a fixed value, or based on the input of the main board The impedance between the terminal and the output terminal is determined.
  • An embodiment of the present application also provides a power supply device 1200.
  • the device 1200 includes an output circuit 1210 and a controller 1220.
  • the output circuit 1210 is configured to provide output current to the electronic device.
  • the controller 1220 is configured to receive the feedback voltage V determined by the electronic device, the feedback voltage V satisfies: V1 ⁇ V ⁇ (V1+ ⁇ V), where V1 represents the voltage of the input terminal of the battery , ⁇ V represents the voltage difference between the input terminal and the output terminal of the motherboard; the output current of the power supply device is adjusted according to the feedback voltage.
  • the feedback voltage V V1+ ⁇ V.
  • An embodiment of the present application also provides a computer-readable storage medium storing computer-executable instructions configured to execute any one of the charging current control methods 200, 600, 900, or 1100 described above.
  • the embodiments of the present application also provide a computer program product.
  • the computer program product includes a computer program stored on a computer-readable storage medium.
  • the computer program includes program instructions. When the program instructions are executed by a computer, the computer program The computer executes any one of the charging current control methods 200, 600, 900, or 1100 described above.
  • FIG. 13 is a schematic structural diagram of a charging system provided by an embodiment of the present application.
  • the charging system includes a power supply device 10, a battery management circuit 20 and a battery 30.
  • the battery management circuit 20 can be used to manage the battery 30.
  • the battery management circuit 20 can manage the charging process of the battery 30, such as selecting the charging channel, controlling the charging voltage and/or charging current, etc.; as another example, the battery management circuit 20 can perform the charging process of the battery 30 Management, such as balancing the voltage of the battery cells in the battery 30.
  • the battery management circuit 20 may include a first charging channel 21 and a communication control circuit 23.
  • the first charging channel 21 can be used to receive the charging voltage and/or charging current provided by the power supply device 10 and load the charging voltage and/or charging current on both ends of the battery 30 to charge the battery 30.
  • the first charging channel 21 can be understood as the charging channel described above, and can be used to charge the battery 30.
  • the first charging channel 21 may be, for example, a wire, and some other circuit devices that are not related to the conversion of the charging voltage and/or the charging current may also be provided on the first charging channel 21.
  • the power management circuit 20 includes a first charging channel 21 and a second charging channel, and a switching device for switching between charging channels may be provided on the first charging channel 21 (see the description of FIG. 14 for details).
  • the type of the power supply device 10 is not specifically limited.
  • the power supply device 10 may be a device specially used for charging such as an adapter and a power bank, or may be a computer and other devices capable of providing power and data services.
  • the first charging channel 21 may be a direct charging channel, and the charging voltage and/or charging current provided by the power supply device 10 may be directly loaded on both ends of the battery 30.
  • the embodiment of the present application introduces a control circuit with a communication function, that is, the communication control circuit 23, into the battery management circuit 20.
  • the communication control circuit 23 can maintain communication with the power supply device 10 during the direct charging process to form a closed-loop feedback mechanism, so that the power supply device 10 can learn the status of the battery in real time, thereby continuously adjusting the charging voltage and the charging voltage injected into the first charging channel. /Or the charging current to ensure that the charging voltage and/or the charging current provided by the power supply device 10 match the current charging stage of the battery 30.
  • the communication control circuit 23 can communicate with the power supply device 10 when the voltage of the battery 30 reaches the charging cut-off voltage corresponding to the constant current stage, so that the power supply device 10 converts the charging process of the battery 30 from constant current charging to constant current charging. Pressure charging.
  • the communication control circuit 23 can communicate with the power supply device 10 when the charging current of the battery 30 reaches the charging cut-off current corresponding to the constant voltage stage, so that the power supply device 10 converts the charging process of the battery 30 from constant voltage charging Charge for constant current.
  • the battery management circuit provided in the embodiment of the present application can directly charge the battery.
  • the battery management circuit provided in the embodiment of the present application is a battery management circuit that supports a direct charge architecture. In the direct charge architecture, there is no need for a direct charge channel.
  • the conversion circuit is provided to reduce the heat generation of the device to be charged during the charging process.
  • the battery management circuit 20 may further include a second charging channel 24.
  • a boost circuit 25 is provided on the second charging channel 24.
  • the boost circuit 25 can be used to receive the initial voltage provided by the power supply device 10, boost the initial voltage to a target voltage, and provide the battery based on the target voltage.
  • 30 charging wherein the initial voltage is less than the total voltage of the battery 30, and the target voltage is greater than the total voltage of the battery 30; the communication control circuit 23 can also be used to control the switching between the first charging channel 21 and the second charging channel 24.
  • the second charging channel 24 can be compatible with a common power supply device to charge the battery 30, which solves the problem that the common power supply device cannot charge multiple batteries.
  • the battery management circuit 20 may also include an equalization circuit 22, referring to the above description, the equalization circuit 22 can be used to balance the multiple cells during the charging process and/or discharging process of the battery The voltage of the core.
  • the embodiment of the present application does not limit the specific form of the boost circuit 25.
  • a Boost boost circuit can be used, or a charge pump can be used for boosting.
  • the second charging channel 24 may adopt a traditional charging channel design method, that is, a conversion circuit (such as a charging IC) is provided on the second charging channel 24.
  • the conversion circuit can perform constant voltage and constant current control on the charging process of the battery 30, and adjust the initial voltage provided by the power supply device 10 according to actual needs, such as step-up or step-down.
  • the embodiment of the present application can utilize the boost function of the conversion circuit to boost the initial voltage provided by the power supply device 10 to the target voltage.
  • the communication control circuit 23 can switch between the first charging channel 21 and the second charging channel 24 through a switching device.
  • a switch tube Q5 may be provided on the first charging channel 21.
  • the switch tube Q5 in the embodiment of the present application may be a MOS tube or a switch.
  • a circuit or device for step-down can also be provided on the second charging channel 24, and when the voltage provided by the power supply device is higher than the required voltage of the battery 30, the step-down process can be performed.
  • the circuit or module included in the second charging channel 24 is not limited.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD)), etc.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • first, second, etc. may be used in this application to describe various devices, these devices should not be limited by these terms. These terms are only used to distinguish one device from another.
  • the first device can be called the second device, and similarly, the second device can be called the first device, as long as all occurrences of "first device” are renamed consistently and all occurrences Just rename the "second device” consistently.
  • the first device and the second device are both devices, but they may not be the same device.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

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Abstract

本申请提供一种充电电流控制方法、电子设备和电源提供装置，包括：在为所述电池充电的过程中，所述电子设备确定目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为所述电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供装置的输出端和所述电池的输入端之间的总阻抗；所述电子设备向所述电源提供装置发送指示信息，所述指示信息指示所述电源提供装置根据所述目标阻抗调整所述电源提供装置的输出电流。由于所确定的目标阻抗不包括主板的阻抗或包括主板的部分阻抗，因此能够避免因为主板的阻抗增加而调整快充电流或退出快速充电模式。

Description

充电电流控制方法、电子设备和电源提供装置 技术领域
本申请实施例涉及充电技术领域，并且更具体地，涉及一种充电电流控制方法、电子设备和电源提供装置。
背景技术
随着电子设备(如手机、pad、手环等)的普及，电子设备的功能不断丰富，有些厂商推出了支持快速充电模式的电子设备，快充技术大大缩短了电子设备的充电时间，受到用户的广泛青睐。
目前快充技术一般采用的是大电流方式或高压快充方式。当采用快充技术对电子设备充电时，随着充电过程的进行，在主板使用了一段时间后，其阻抗值会增加，这样整个充电回路的阻抗就会增加。若继续采用快充技术对电子设备进行充电，会导致充电回路上的某些局部器件异常发热，造成严重烧毁的问题。针对充电回路上局部阻抗过大导致局部器件异常发热甚至严重烧毁这一问题，可对整体的充电通路阻抗进行管控，即根据整体的充电通路阻抗值的大小，调整充电回路的充电电流值。然而实际上主板是可以承受更大的电流的。这种情况下，调整快充电流或退出快速充电模式，导致充电速度降低，充电时间过长。
发明内容
本申请实施例提供一种充电电流控制方法、电子设备和电源提供设备，以解决相关技术中的充电问题。
第一方面，提供一种充电电流控制方法，所述方法用于电子设备，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，所述方法包括：在为所述电池充电的过程中，所述电子设备确定目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供装置的输出端和所述电池的输入端之间的总阻抗；所述电子设备向所述电源提供装置发送指示信息，所述指示信息指示所述电源提供装置根据所述目标阻抗调整所述电源提供装置的输出电流。
在本申请实施例提供的充电电流控制方法中，通过对充电回路中的目标阻抗的管理确定电源提供装置的输出电流，由于所确定的目标阻抗不包括主板的阻抗或包括主板的部分阻抗，这样可以避免或减少主板的阻抗对电源提供装置的输出电流的调整的影响，从而可以延迟电源提供装置的输出电流的调整。相比于现有技术中根据充电回路的阻抗确定充电电流，本申请提供的方案能够避免因为主板的阻抗增加而盲目的调整快充电流或退出快速充电模式。
结合第一方面，在第一方面的一种实现方式中，所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示所述电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电子设备从所述电源提供装置接收到的输入电流。
在本申请提供的充电电流控制方法中，由于确定的目标阻抗不包含主板的阻抗，在充电回路的阻抗的增大时并非是主板的阻抗引起的，从而能够避免因为主板的阻抗增大而盲目的调整快充电流或退出快速充电模式。
结合第一方面，在第一方面的一种实现方式中，所述目标阻抗为R＝(V0-(V1+I*R″))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电子设备从所述电源提供装置接收到的输入电流，R″为固定值，或基于所述主板的输入 端和输出端之间的阻抗确定。
在本申请提供的充电电流控制方法中，在确定目标阻抗时，与完全不考虑主板的阻抗相比，由于确定的目标阻抗包含主板的部分阻抗，能够避免因为主板的阻抗持续快速地增加而未考虑主板的阻抗所导致的主板的严重发热甚至主板烧毁的问题。
结合第一方面，在第一方面的一种实现方式中，在所述电子设备确定目标阻抗之前，还包括：确定所述主板的输入端和输出端之间的阻抗；所述确定所述目标阻抗包括：当所述主板的输入端和输出端之间的阻抗大于预设的预设阈值时，将所述目标阻抗确定为R＝(V0-(V1+I*R″))/I；当所述主板的输入端和输出端之间的阻抗小于或等于所述预设阈值时，将所述目标阻抗确定为R＝(V0-V1)/I。
本申请实施例提供的充电电流控制方法，通过根据主板的阻抗的不同确定不同的目标阻抗，能够更好的对主板的阻抗进行区分管理，能够避免因为除主板以外的充电回路的阻抗增大时不能够及时调整电流的问题，同时也能够避免主板的阻抗持续快速地增加而未考虑主板的阻抗所导致的主板的严重发热甚至主板烧毁的问题。
第二方面，提供一种电子设备，包括：主板，所述主板的输入端与充电接口的输出端相连，所述主板的输出端与电池的输入端相连；控制器，用于执行以下操作：在为所述电池充电的过程中，所述电子设备确定目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供装置的输出端和所述电池的输入端之间的总阻抗；所述电子设备向所述电源提供装置发送指示信息，所述指示信息指示所述电源提供装置根据所述目标阻抗调整所述电源提供装置的输出电流。
本申请实施例提供的电子设备，通过执行第一方面中任一实施方式的充电电流控制方法，能够避免因为主板的阻抗增加而盲目的调整快充电流或退出快速充电模式。
第三方面，提供一种充电电流控制方法，所述方法用于电子设备，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，所述方法包括：在为所述电池充电的过程中，所述电子设备确定所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV；所述电子设备根据所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV，确定反馈电压V，其中，所述反馈电压V满足：V1＜V≤(V1+ΔV)；所述电子设备向所述电源提供装置发送所述反馈电压，以便所述电源提供装置根据所述反馈电压调整所述电源提供装置的输出电流。
本申请实施例提供的充电电流控制方法，通过电子设备向电源提供装置发送用于计算目标阻抗的反馈电压，以便于电源提供装置根据接收到的反馈电压确定电源提供装置的输出电流，由于V1＜V≤(V1+ΔV)，所以反馈电压V是不包含主板的电压或者包含主板的部分电压，因此，可以使得电源提供装置所确定的目标阻抗不包括主板的阻抗或包括主板的部分阻抗，这样可以避免或减少主板的阻抗对电流的调整的影响，从而可以延迟充电电流的调整。
结合第三方面，在第一方面的一种实现方式中，所述反馈电压为V＝V1+ΔV。
结合第三方面，在第一方面的一种实现方式中，所述反馈电压为V＝V1+I*R″，其中，I表示所述电子设备从所述电源提供装置接收到的输入电流，R″为固定值，或基于所述主板的输入端和的输出端之间的阻抗确定。
结合第三方面，在第一方面的一种实现方式中，在所述确定所述反馈电压之前，还包括：确定所述主板的输入端和输出端之间的阻抗；所述确定反馈电压，包括：当所述主板的输入端和输出端之间的阻抗大于预设阈值时，确定所述反馈电压V＝V1+I*R″；当所述主板的输入端和输出端之间的阻抗小于所述预设阈值时，确定所述反馈电压V＝V1。
本申请实施例中，根据主板的阻抗的不同，向电源提供装置发送的反馈电压也不同， 以便于电源提供装置根据反馈电压确定输出电流，能够避免因为除主板以外的充电回路的阻抗增大时不能够及时调整电流的问题，同时也能够避免因为主板的阻抗持续快速地增加而未考虑主板的阻抗所导致的主板的严重发热甚至主板烧毁的问题。
第四方面，提供一种电子设备，包括：主板，所述主板的输入端与充电接口的输出端相连，所述主板的输出端与电池的输入端相连；控制器，用于执行以下操作：在为所述电池充电的过程中，所述电子设备确定所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV；根据所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV，确定反馈电压V，其中，所述反馈电压V满足：V1＜V≤(V1+ΔV)；所述电子设备向所述电源提供装置发送所述反馈电压，以便所述电源提供装置根据所述反馈电压调整所述电源提供装置的输出电流。
本申请实施例提供的电子设备，通过执行第三方面中任一实施方式的充电电流控制方法，能够避免因为主板的阻抗增加而盲目的调整快充电流或退出快速充电模式。
第五方面，提供一种充电电流控制方法，所述方法用于电子设备，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，所述方法包括：接收电子设备确定的目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供装置的输出端和所述电池的输入端之间的总阻抗；根据所述目标阻抗调整所述电源提供装置的输出电流。
第六方面，提供一种电源提供装置，所述电源提供装置用于为电子设备的电池充电，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，所述电源提供装置包括：输出电路，用于向所述电子设备提供输出电流；控制器，用于接收电子设备确定的目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为所述电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供装置的输出端和所述电池的输入端之间的总阻抗；根据所述目标阻抗调整所述电源提供装置的输出电流。
第七方面，提供一种充电电流控制方法，所述方法用于电子设备，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，所述方法包括：接收所述电子设备确定的反馈电压V，所述反馈电压V满足：V1＜V≤(V1+ΔV)，其中，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差；根据所述反馈电压调整电源提供装置的输出电流。
第八方面，提供一种电源提供装置，所述电源提供装置用于为电子设备的电池充电，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，所述电源提供装置包括：输出电路，用于向所述电子设备提供输出电流；控制器，用于接收所述电子设备确定的反馈电压V，所述反馈电压V满足：V1＜V≤(V1+ΔV)，其中，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差；根据所述反馈电压调整电源提供装置的输出电流。
第九方面，提供一种计算机可读储存介质，存储有计算机可执行指令，所述计算机可执行指令设置为执行上述充电电流控制方法中任一种充电电流控制方法。
第十方面，提供一种计算机程序产品，所述计算机程序产品包括存储在计算机可读存储介质上的计算机程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，使所述计算机执行上述的充电电流控制方法。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的充电回路的示意图；
图2是本申请一个实施例提供的充电电流控制方法的示意性流程图；
图3是本申请实施例提供的电压采集原理示意图；
图4是本申请另一个实施例提供的充电电流控制方法的示意性流程图；
图5是本申请一个实施例提供的电子设备的示意性结构图；
图6是本申请又一个实施例提供的充电电流控制方法的示意性流程图；
图7是本申请再一个实施例提供的充电电流控制方法的示意性流程图；
图8是本申请一个实施例提供的电子设备的示意性结构图；
图9是本申请再一个实施例提供的充电电流控制方法的示意性流程图；
图10是本申请一个实施例提供的电源提供装置的示意性结构图；
如11是本申请再一个实施例提供的充电电流控制方法的示意性流程图；
图12是本申请另一个实施例提供的电源提供装置的示意性结构图；
图13是本申请一个实施例提供的有线充电系统的示意性结构图；
图14是本申请又一个实施例提供的有线充电系统的示意性结构图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请的一部分实施例，而不是全部实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都应属于本申请保护的范围。
为了更加清楚地理解本申请，以下将介绍快速充电的工作原理，便于后续理解本申请的方案。但应理解，以下介绍的内容仅仅是为了更好的理解本申请，不应对本申请造成特别限定。
如图1所示为应用本申请实施例的快速充电的示意图，该快速充电示意图中包括：电池，快充通路，通用串行总线接口(USB接口)，数据线以及适配器。以手机为例，手机中设置有电池和快速通路，适配器与手机通过USB接口相连，该USB接口可以是Micro USB接口，也可以是Type-c USB接口。其中，USB接口中的数据线用于适配器和手机进行双向通信，该数据线可以是USB接口中的D+线和/或D-线，所谓双向通信可以指适配器和手机双方进行信息的交互。
本申请实施例中的适配器支持普通充电模式和快速充电模式，其中快速充电模式的充电电流大于普通充电模式的充电电流或者快速充电模式的充电电压高于普通充电模式的充电电压(或者，快速充电模式的充电速度大于普通充电模式的充电速度)。
一般而言，普通充电模式是指电源提供装置输出相对较小的电流值(通常小于2.5A)或者以相对较小的功率(通常小于15W)来对待充电设备中的电池进行充电，在普通充电模式下想要完全充满一较大容量电池(如3000毫安时容量的电池)，通常需要花费数个小时的时间；而在快速充电模式下，电源提供装置能够输出相对较大的电流，(通常大于2.5A，比如4.5A，5A甚至更高)或者以相对较大的功率(通常大于或等于15W)来对待充电设备中的电池进行充电，相较于普通充电模式而言，电源提供装置在快速充电模式下完全充满相同容量电池所需要的充电时间能够明显缩短、充电速度更快。在本申请实施例中，快速充电模式也可以根据阻抗的不同分为多个快速充电阶段，其中，随着阻抗的增加，快速充电阶段的电流呈递减趋势。
以手机为例，利用快速充电模式对手机进行充电的过程中，手机端实时将靠近电源端的电池电压V1通过数据线上的数据线上的D+、D-信号发送给电源提供装置，电源提供装置通过将V1与自己输出的电压V0进行比较，再除以充电电流I可得到充电回路的阻抗R，即R＝(V0-V1)/I。在一个实施例中，阻抗的具体管控方法可如表1所示：
表1
通路阻抗 R≤R1 R1<R≤R2 R2<R≤R3 R>R3
快充电流 I1 I2 I3 退出快充
当充电回路的阻抗R小于R1时，使用电流I1进行快充；当阻抗增大至满足R1<R≤R2时，控制充电回路的电流降低至I2进行快充(I2<I1)；若阻抗继续增大至满足R2<R≤R3，控制充电回路的电流降低至I3进行快充(I3<I2)；若阻抗继续增大至满足R>R3，退出快速充电模式，使用普通充电模式对手机进行充电。
也就是说，在对手机进行充电的过程中，电源提供装置根据充电回路的阻抗的变化不断调整快速充电模式下的充电电流值直到退出快速充电模式。但是，当主板使用了一段时间后，其阻抗值会增加，这样整个充电回路的阻抗就会增加，按照上述快速充电模式的管控方法，会控制充电电流降低，然而实际上主板是可以承受更大的电流的。
因此，本申请实施例提供了以下的方案，能够避免因为主板的阻抗增加而导致的盲目的调整快充电流或退出快速充电模式。
下面结合图2，对本申请实施例提供的充电电流控制方法进行详细说明。
如图2所示，本申请实施例提供的充电电流控制方法200可以包括步骤210-220。
210，在为所述电池充电的过程中，所述电子设备确定目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为所述电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供装置的输出端和所述电池的输入端之间的总阻抗。
本申请实施例中，主板上的阻抗与电子设备采用的充电方案有关，本申请实施例对此并不限定。可选地，在一些实施例中，电子设备采用直充方案对电池进行充电，主板可以包括一个或多个开关器件(例如可以是MOS管)。在这种情况下，主板的阻抗可以指的是该一个或多个开关器件的阻抗。可选地，在另一些实施例中，电子设备可以采用普通充电方案对电池进行充电，主板可以包括降压电路、稳压电路等电路器件。在这种情况下，主板的阻抗可以指该降压电路、稳压电路等电路器件的阻抗。
应理解，本申请实施例中的目标阻抗可以为不包括主板的阻抗，也可以为包括主板的部分阻抗。在目标阻抗为不包括主板的阻抗时，目标阻抗可以包括除主板之外的充电回路的全部阻抗或部分阻抗，例如，可以包括USB接口、数据线的阻抗等，也可以仅包括USB接口或数据线的阻抗；在目标阻抗包括主板的部分阻抗时，目标阻抗也可以包括除主板之外的充电回路的全部阻抗或部分阻抗，例如，可以包括USB接口、数据线的阻抗等，也可以仅包括USB接口或数据线的阻抗，本申请对此不作具体限定。
可选地，在一些实施例中，第一阻抗可以为电源提供装置的输出端和主板的输入端之间的全部阻抗或部分阻抗，这种情况下，本申请实施例中的第一阻抗可以包括USB接口和/或数据线的阻抗。
可选地，在一些实施例中，第一阻抗可以为电子设备的充电接口的输入端和主板的输入端之间的全部阻抗或部分阻抗，这种情况下，本申请实施例中的第一阻抗可以包括USB接口的阻抗。
应理解，在一些实施例中，电源提供装置的输出电压和电子设备的充电接口的输入电压相等，这种情况下，同一充电过程中，电源提供装置的输出端和主板的输入端之间的阻抗与电子设备的充电接口的输入端和主板的输入端之间的阻抗也是相等的。
本申请实施例中，充电回路中包括电池，主板，USB接口，数据线以及电源提供装 置，充电回路的阻抗为从电源提供装置的输出电压到电池的输入电压的差值与充电电流的比值。本申请实施例中的电源提供装置可以理解为上文提到的适配器，为电子设备进行充电。
220，所述电子设备向所述电源提供装置发送指示信息，所述指示信息指示所述电源提供装置根据所述目标阻抗调整所述电源提供装置的输出电流。
具体地，在得到目标阻抗后，电子设备可以向电源提供装置发送目标阻抗，电源提供装置根据目标阻抗以及阻抗与电流的对应关系，确定电源提供装置的输出电流。
本申请实施例中的指示信息可以为文字信息，还可以为信号指令，本申请对此不作具体限定。
本申请实施例中，充电电流控制方法由电子设备进行管理，在一种实施例中，电子设备确定目标阻抗后，将目标阻抗发送至电源提供装置，电源提供装置根据目标阻抗以及阻抗与电流的对应关系确定电源提供装置的输出电流；在另一种实施例中，由电子设备确定目标阻抗以及根据阻抗与电流的对应关系确定电源提供装置的输出电流，再由电子设备将确定出的电流发送至电源提供装置，以便于电源提供装置根据接收到的电流对电源提供装置的输出电流进行调整。
在本申请实施例提供的充电电流控制方法中，通过对充电回路中的目标阻抗的管理确定电源提供装置的输出电流，由于所确定的目标阻抗不包括主板的阻抗或包括主板的部分阻抗，这样避免或减少主板的阻抗对电源提供装置的输出电流的调整的影响，从而可以延迟电源提供装置的输出电流的调整。相比于现有技术中根据充电回路的阻抗确定电源提供装置的输出电流，本申请提供的方案能够避免因为主板的阻抗增加而盲目的调整快充电流或退出快速充电模式。
为了便于描述，本申请实施例将以电流I1充电的过程称为第一充电阶段，以电流I2充电的过程称为第二充电阶段，以电流I3充电的过程称为第三充电阶段。
应理解，本申请实施例中在确定电源提供装置的输出电流后，可以对电源提供装置的输出电流进行调整，也可以不对其进行调整。例如，若以第一充电阶段的电流I1对电子设备进行充电，随着充电的不断进行，当确定出的阻抗仍然处于第一充电阶段，此时电源提供装置不会调整电流，仍然以第一充电阶段的电流I1对电子设备进行充电；当确定出的阻抗位于第二充电阶段，此时电源提供装置才会去调整电流至I2对电子设备进行充电。
可选地，在一些实施例中，所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示所述电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电子设备从所述电源提供装置接收到的输入电流。
具体地，在确定目标阻抗时，可以不考虑主板的阻抗，即目标阻抗为R＝(V0-(V1+ΔV))/I，这种情况下，确定的目标阻抗中包括充电回路上除主板之外的其余器件的阻抗或部分阻抗，例如，可以包括数据线的阻抗，USB接口的阻抗等。
本申请实施例中，以手机为例，可以通过采集主板的输入电压V3和输出电压V2，计算出主板上的电压差ΔV＝V3-V2，手机端实时将主板的电压差ΔV与电池端的电压V1发送至电源提供装置，电源提供装置通过将主板的电压差ΔV与电池端的电压V1与自己输出的电压进行比较，再除以充电电流I可得到阻抗R，即R＝[V0-(V1+ΔV)]/I。根据阻抗R的不同对电源提供装置的输出电流进行调整。
其中，本申请实施例中对于阻抗的具体管控方法可以如表2所示。
表2
通路阻抗 R≤R'1 R'1<R≤R'2 R'2<R≤R'3 R>R'3
快充电流 I1 I2 I3 退出快充
可以理解的是，在同一充电过程中，以电源提供装置输出电压V0，电池端的输入电 压V1为例，现有技术中的阻抗为R＝(V0-V1)/I，而本申请实施例中的阻抗R＝[V0-(V1+ΔV)]/I，则对于同一充电过程，按照本申请实施例的方法所计算出的阻抗R小于现有技术中计算出的阻抗R。针对不同的阻抗管控方法，根据阻抗管控范围的不同可能会导致调整为不同的充电电流对手机进行充电。
例如，在第一充电阶段时，以4A的充电电流对手机进行充电，整个充电回路(包括主板、USB接口以及数据线等)的初始阻抗为100mΩ，主板的阻抗为50mΩ。随着充电过程的不断进行，当整个充电回路的阻抗增大至200mΩ(R1＝200mΩ)，此时现有技术中会调整电源提供装置的输出电流，可能调整为2.5A，即进入第二充电阶段。
然而，即使在整个充电回路的阻抗增大至200mΩ时，也可以不用调整电流，因为主板是可以承受更大的电流的。以上述充电过程为例，当整个充电回路的阻抗增大至200mΩ(R1＝200mΩ)，此时，主板的阻抗可能为130mΩ，本申请实施例中所计算的目标阻抗R为70mΩ，对应于表2，若R'1的取值为100mΩ，根据本申请实施例中的方法还是可以以第一充电阶段的电流继续对手机进行充电，即继续以4A的充电电流对手机进行充电，由此能够避免因为主板的阻抗增大而盲目的调整快充电流。
本申请实施例中，表2中R'1、R'2、R'3的取值可以根据经验或多次调试可得，但应注意，R'1、R'2、R'3的取值应该分别小于R1、R2、R3的取值，即R'1<R1，R'2<R2，R'3<R3。
本申请实施例中的R'1、R'2、R'3的之间的差值可以相等，也可以不相等，本申请对此不作具体限定。
在本申请提供的充电电流控制方法中，由于所确定的目标阻抗R不包含主板的阻抗，在充电回路的阻抗的增大时并非是主板的阻抗引起的，从而能够避免因为主板的阻抗增大而盲目的调整快充电流或退出快速充电模式。
然而，在一些情况下，可能由于主板的阻抗持续快速地增加而导致的主板的发热严重的问题，因此，为了避免这一情况，在确定目标阻抗时，应该考虑主板的部分阻抗。
可选地，在一些实施例中，所述目标阻抗为R＝(V0-(V1+I*R″))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电子设备从所述电源提供装置接收到的输入电流，R″为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
具体地，在确定目标阻抗时，为了避免因为主板的阻抗持续快速地增加而导致的主板的发热严重的问题，因此，应该考虑主板的部分阻抗，即所计算的目标阻抗为R＝(V0-(V1+I*R″))/I，其中，本申请实施例中的R″为固定值，或基于所述主板的输入端和输出端之间的阻抗确定，在这种情况下，所确定的目标阻抗大于完全不考虑主板时所确定的目标阻抗，对于同一种阻抗与电流的对应关系，本申请实施例能够及时切换电流，能够避免因为主板的阻抗持续快速地增加而导致的主板的发热严重的问题。
本申请实施例中的R″可以为经验值，也可以为测试值，本申请对此不作具体限定。本申请实施例中的R″可以小于主板的输入端和输出端之间的初始阻抗，也可以小于主板的输入端和输出端之间的实时测量的阻抗。
在本申请提供的充电电流控制方法中，在确定目标阻抗时，与完全不考虑主板的阻抗相比，由于所确定的目标阻抗包含主板的部分阻抗，进一步地，能够避免因为主板的阻抗持续快速地增加而未考虑主板的阻抗所导致的主板的严重发热甚至主板烧毁的问题。
在对电子设备进行充电的过程中，需要采集主板的输入电压和输出电压，即图1中的电压V2和V3，关于电压V2和V3的采集可以有多种方式，可选地，在一些实施例中，可以利用微控制单元(Microcontroller Unit，MCU)的模数转换器(Analog To Digital Converter，ADC)引脚采集电压V2和V3。
先简单介绍下MCU，MCU又称为单片微型计算机(Single Chip Microcomputer，SCM) 或者单片机，是把中央处理器(Central Process Unit，CPU)的频率与规格做适当缩减，并将内存(memory)、计数器(Timer)、USB、A/D转换、UART、PLC、DMA等周边接口，甚至LCD驱动电路都整合在单一芯片上，形成芯片级的计算机，为不同的应用场合做不同组合控制。诸如手机、PC外围、遥控器，至汽车电子、工业上的步进马达、机器手臂的控制等，都可见到MCU的身影。本申请实施例中可以将MCU应用于手机对其进行说明。
下面将具体介绍如何利用MCU的ADC引脚采集电压。
以采集主板的输出电压V2为例，如图3所示，为ADC采集原理图。在对手机充电过程中，手机中的主板的受到MCU的控制，因此可以通过ADC引脚对MCU的测量来采集主板的输出电压V2。
可以理解的是，在对手机充电过程中，若电源提供装置以5V电压对手机进行充电，而电压是以模拟信号存在的，采集到的电压是模拟信号，通常是以二进制的形式表示的，因此需要将模拟信号转换为数字信号。以图3为例，电压V2与V 采集之间具有如下关系：
V 采集＝[R10/(R10+R20)]*V2
例如，若图中的R10，R20均为10000Ω，若采集到的V 采集为1.9V，则快充通路的输出电压V2为3.8V。
类似地，主板的输入电压V3也可以采用相同的方式进行采集，也可以采用其他方式进行采集，本申请对此不作具体限定。
当然，在本申请实施例中，若想要进一步了解充电过程中的充电回路的阻抗的变化，可以采集充电回路的任何一点电压，例如，USB座的输入输出电压，或数据线上的输入输出电压等。
上述实施例说明了可以通过对主板的阻抗进行单独管理，即在确定目标阻抗的时候，不包括主板的阻抗或包括主板的部分阻抗，以避免因为主板的阻抗增大而盲目的调整快充电流或退出快速充电模式。为了进一步实现对充电回路的阻抗更有效的控制，可以根据主板的阻抗的不同决定目标阻抗。下面将对其进行具体介绍。
可选地，在一些实施例中，如图4所示，在确定所述目标阻抗之前，所述方法200还可以包括步骤230。
230，计算所述主板的输入端和输出端之间的阻抗。
当所述主板的输入端和输出端之间的阻抗大于预设的预设阈值R'时，将所述目标阻抗确定为R＝(V0-(V1+I*R″))/I；当所述主板的输入端和输出端之间的阻抗小于或等于所述预设阈值R'时，将所述目标阻抗确定为R＝(V0-V1)/I。
本申请实施例中的预设阈值R'可以是经验值，也可以是通过调试得到，本申请对此不作具体限定。
由上述实施例可知，主板的输入电压V3和输出电压V2可以通过ADC引脚采集，充电电流I可以通过从手机电池的电量计处获取，这样就可得到主板的阻抗R，即主板的阻抗R＝(V3-V2)/I。
根据主板的输入端和输出端之间的阻抗的不同，确定目标阻抗，当主板的输入端和输出端之间的阻抗大于预设的阈值R'时，目标阻抗确定为R＝(V0-(V1+I*R″))/I＝(V0-V1)/I-R″；当主板的输入端和输出端之间的阻抗小于或等于所述预设阈值R'时，将所述目标阻抗确定为R＝(V0-V1)/I。
其中，本申请实施例中的R″可以等于预设阈值R'，也可以小于预设阈值R'，本申请对此不作具体限定。
具体地，例如，假设预设阈值R'为100mΩ，以手机为例，在对手机初始充电时，以4A的充电电流对手机进行充电，充电回路的初始阻抗为100mΩ，主板的输入端和输出端之间的阻抗为50mΩ。随着充电过程的不断进行，若主板的输入端和输出端之间的阻抗增加至80mΩ(主板的输入端和输出端之间的阻抗小于预设阈值100)，而除主板的 以外的充电回路的阻抗增加至130mΩ，此时目标阻抗确定为R＝(V0-V1)/I＝R 回路＝80+130＝210mΩ；当主板的输入端和输出端之间的阻抗增加至110mΩ(主板的输入端和输出端之间的阻抗大于预设阈值100)，而除主板的以外的充电回路的阻抗增加至160mΩ，此时目标阻抗R＝(V0-(V1+I*R″))/I＝(V0-V1)/I-R″＝R 回路-R″＝270-R″。
在本申请实施例中，以下将对主板的输入端和输出端之间的阻抗大于预设的阈值R'时，目标阻抗确定为R＝(V0-(V1+I*R″))/I＝(V0-V1)/I-R″；当主板的输入端和输出端之间的阻抗小于或等于所述预设阈值R'时，将所述目标阻抗确定为R＝(V0-V1)/I的原因进行说明。
考虑到主板的阻抗的大小对于充电回路的阻抗的影响，在主板的输入端和输出端之间的阻抗小于预设阈值R'时，若确定的目标阻抗为R＝(V0-(V1+I*R″))/I＝(V0-V1)/I-R″，相当于在现有技术的基础上减少了R″值，这样可能会引起在除主板的以外的充电回路的阻抗增大时不能够及时调整电流的问题。
例如，假设预设阈值R'为100，以手机为例，在对手机初始充电时，以4A的充电电流对手机进行充电，充电回路的初始阻抗为100mΩ，主板的输入端和输出端之间的阻抗为50mΩ。随着充电过程的不断进行，若主板的输入端和输出端之间的阻抗增加至80mΩ(此时主板的输入端和输出端之间的阻抗小于预设阈值)，而除主板以外的充电回路的阻抗增加至130mΩ(R1＝200mΩ)，若根据充电回路的阻抗R 回路以及阻抗与电流的对应关系，确定充电电流，即将充电回路的阻抗R 回路确定为目标阻抗，则目标阻抗R＝R 回 路＝80+130＝210mΩ>R1＝200mΩ，由于充电回路的阻抗增大且大于R1，电源提供装置会调整充电电流至下一充电阶段；然而若将充电回路的阻抗与R″的差值作为目标阻抗，即根据目标阻抗R＝R 回路-R″以及阻抗与电流的对应关系来确定充电过程中的充电电流，若R″取值为20mΩ，此时目标阻抗R＝R 回路-R″＝210-R″＝190mΩ<R1＝200mΩ，这种情况下，电源提供装置不会调整充电电流，仍然以4A的充电电流对手机进行充电(实际情况中，在主板的输入端和输出端之间的阻抗小于预设阈值R'的情况下，由于除主板以外的充电回路上的阻抗增大，此时电源提供装置应该调整充电电流)，从而可能会引起在除主板以外的充电回路的阻抗增大时不能够及时调整电流的问题。
因此，在主板的输入端和输出端之间的阻抗小于预设阈值R'时，应根据充电回路的阻抗确定充电过程中的充电电流，能够避免因为除主板以外的充电回路的阻抗增大时不能够及时调整电流的问题。
本申请实施例提供的充电电流控制方法，通过根据主板的输入端和输出端之间的阻抗不同确定不同的目标阻抗，能够更好的对主板的阻抗进行区分管理，能够避免因为除主板以外的充电回路的阻抗增大时不能够及时调整电流的问题，同时也能够避免主板的阻抗持续快速地增加而未考虑主板的阻抗所导致的主板的严重发热甚至主板烧毁的问题。
可选地，在一些实施例中，在主板的输入端和输出端之间的阻抗大于预设的阈值R'时，可以根据如表1的对应关系进行调整，也可以根据如表3的对应关系进行调整。
表3
通路阻抗 R≤R1+R0 R1+R0<R≤R2+R0 R2+R0<R≤R3+R0 R>R3+R0
快充电流 I1 I2 I3 退出快充
具体地，当主板的输入端和输出端之间的阻抗小于或等于预设阈值R'时，确定阻抗与电流的对应关系可以根据表1所示的对应关系进行确定，在第一充电阶段时，以4A的充电电流对手机进行充电，充电回路的初始阻抗为100mΩ，主板的输入端和输出端之间的阻抗为50mΩ。随着充电过程的不断进行，当充电回路的阻抗增大至200mΩ(R1＝200mΩ)，此时会调整充电电流，可能调整为2.5A，即进入第二充电阶段。
当主板的输入端和输出端之间的阻抗大于预设阈值R'时，确定阻抗与电流的对应关 系可以根据表1所示的对应关系进行确定，在对手机初始充电时，以4A的充电电流对手机进行充电，充电回路的初始阻抗为100mΩ，主板的输入端和输出端之间的阻抗为50mΩ。随着充电过程的不断进行，充电回路的阻抗增加至500mΩ，在对充电电流进行调整前，可以先对充电回路的阻抗进行调整以得到目标阻抗，再根据目标阻抗调整充电电流。例如，目标阻抗R可以调整为：R＝R 回路-R″＝500-R″，现有技术中是根据充电回路的阻抗进行调整，即根据R 回路＝500mΩ对充电电流进行调整。
与现有技术相比，在同一时刻，本申请实施例中目标阻抗相当于减少了R″，若表1中的R3为500mΩ，现有技术中会准备调整电流以退出快速充电模式；而本申请实施例中由于对目标阻抗进行了调整，可能不会改变充电电流，如，若R″取值为50mΩ，则电源提供装置所计算的充电回路的目标阻抗为R＝R 回路-R″＝500-R″＝450mΩ<500mΩ，此时对应于表1，电源提供装置不会调整电流，而是仍然以当前充电电流I3对手机进行充电。因此，与现有技术相比，通过对目标阻抗进行管理，扩大阻抗的管控范围。
本申请实施例中，当主板的阻抗较大时，确定阻抗与电流的对应关系也可以根据表3所示的对应关系进行确定。
具体地，在对手机初始充电时，以4A的充电电流对手机进行充电，充电回路的初始阻抗为100mΩ，主板的输入端和输出端之间的阻抗为50mΩ。随着充电过程的不断进行，充电回路的阻抗增加至500mΩ，此时目标阻抗为R＝R 回路-R″＝500-R″＝450mΩ，对应于表3，由于在R3基础上增加了阈值R0，此时目标阻抗R＝＝R 回路-R″＝500-R″＝450mΩ<R3+R0，电源提供装置不会对充电电流进行调整，还是会以当前充电电流I3继续对手机进行充电，不会盲目的退出快速充电模式，进一步扩大阻抗的管控范围。
本申请实施例中的R0可以为经验值，也可以为测试值，本申请对此不作具体限定。
本申请实施例还提供一种电子设备500，如图5所示，包括主板510和控制器520。
主板510，所述主板510的输入端与充电接口的输出端相连，所述主板510的输出端与电池的输入端相连。
本申请实施例中的充电接口可以为USB座接口，也可以为电源提供装置的充电接口。
主板510可以是单独位于电子设备内部，也可以是和控制器集成于一体位于电子设备内部，本申请对此不作具体限定。
控制器520用于执行以下操作：在为所述电池充电的过程中，所述电子设备确定目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为所述电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供装置的输出端和所述电池的输入端之间的总阻抗；所述电子设备向所述电源提供装置发送指示信息，所述指示信息指示所述电源提供装置根据所述目标阻抗调整所述电源装置的输出电流。
可选地，在一些实施例中，所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电子设备从所述电源提供装置接收到的输入电流。
可选地，在一些实施例中，所述目标阻抗为R＝(V0-(V1+I*R″))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电子设备从所述电源提供装置接收到的输入电流，R″为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
可选地，在一些实施例中，在所述确定目标阻抗之前，所述控制器还用于：确定所述主板的输入端和输出端之间的阻抗；所述控制器具体用于：当所述主板的输入端和输出端之间的阻抗大于预设的预设阈值时，将所述目标阻抗确定为R＝(V0-(V1+I*R″))/I；当所述主板的输入端和输出端之间的阻抗小于或等于所述预设阈值时，将所述目标阻抗确定为R＝(V0-V1)/I。
本申请实施例中，电子设备500通过确定的目标阻抗确定电源提供装置的输出电流， 将该电流反馈至电源提供装置，电源提供装置根据电子设备反馈的电流对充电过程中的电源提供装置的输出电流进行调整；或者电子设备500可以将计算的目标阻抗发送至电源提供装置，电源提供装置根据目标阻抗以及阻抗与充电电流的对应关系确定充电过程中的电源提供装置的输出电流并对其进行调整。
当然，电源提供装置也可以向电子设备发送信息，用于询问电子设备当前充电电流是否适合，在电子设备接收到信息后，可以向电源提供装置回复当前电流合适、偏高或偏低，电源提供装置根据接收到的回复信息对充电电流做出进一步的调整，以提高充电过程中的安全性。
本申请实施例提供的电子设备500，通过执行充电电流控制方法200，能够避免因为主板的阻抗增加而盲目的调整快充电流或退出快速充电模式。
上文说明了对充电回路中的目标阻抗的管理，可以通过电子设备根据所确定的目标阻抗确定电源提供装置的输出电流。下文将说明通过电子设备确定向电源提供装置发送的反馈电压，以便于电源提供装置根据接收的反馈电压确定电源提供装置的输出电流。
如图6所示，本申请实施例还提供一种充电电流控制方法600，可以包括步骤610-630。
610，在为所述电池充电的过程中，确定所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV。
620，根据所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV，确定反馈电压V，其中，所述反馈电压V满足：V1＜V≤(V1+ΔV)。
630，所述电子设备向所述电源提供装置发送所述反馈电压，以便所述电源提供装置根据所述反馈电压调整所述电源提供装置的输出电流。
具体地，在利用电源提供装置为电池充电的过程中，电子设备先根据电池的输入端的电压V1以及主板的输入端和输出端的电压差ΔV确定反馈电压，其中，反馈电压满足：V1＜V≤(V1+ΔV)，电子设备再将反馈电压提供给电源提供装置，以便于电源提供装置根据电子设备提供的反馈电压确定电源提供设备的输出电流。
本申请实施例中，在电源提供设备接收到电子设备发送的反馈电压后，电源提供设备根据反馈电压与充电电流得到目标阻抗，再通过阻抗与电流的对应关系确定电源提供装置的输出电流。
可以理解的是，反馈电压所满足的关系一方面能够避免因为主板的阻抗增加而盲目的调整快充电流或退出快速充电模式，另一方面又能够避免因为主板的阻抗持续快速地增加而导致的主板的发热严重的问题。
本申请实施例提供的充电电流控制方法，通过电子设备向电源提供装置发送用于确定目标阻抗的反馈电压，以便于电源提供装置根据接收到的反馈电压确定电源提供装置的输出电流，由于V1＜V≤(V1+ΔV)，所以反馈电压V是不包含主板的电压或者包含主板的部分电压，因此，可以使得电源提供装置所确定的目标阻抗不包括主板的阻抗或包括主板的部分阻抗，这样可以避免或减少主板的阻抗对电流的调整的影响，从而可以延迟充电电流的调整。
可选地，在一些实施例中，所述反馈电压为V＝V1+ΔV。
具体地，当确定的反馈电压为V＝V1+ΔV时，即不考虑主板的阻抗，则计算出的阻抗为R＝(V0-(V1+ΔV))/I。根据计算出的目标阻抗确定充电回路中的充电电流。
本申请实施例中，电子设备确定出的反馈电压可以通过电子设备上的管理模块反馈给电源提供装置。
可选地，在一些实施例中，所述反馈电压为V＝V1+I*R″，其中，R″固定值，或基于所述主板的输入端和的输出端之间的阻抗确定。
本申请实施例中的R″可以为经验值，也可以为测试值，本申请对此不作具体限定。本申请实施例中的R″可以小于主板的输入端和输出端之间的初始阻抗，也可以小于主板 的输入端和输出端之间的实时测量的阻抗。
具体地，当确定的反馈电压为V＝V1+I*R″时，由于R″主板的阻抗，因此，该方法相当于考虑了主板的部分阻抗，能够避免因为主板的阻抗持续快速地增加而导致的主板的发热严重的问题。
可选地，在一些实施例中，如图7所示，在步骤630之前，所述充电电流控制方法600还可以包括步骤640。
640，确定所述主板的输入端和输出端之间的阻抗。
当所述主板的输入端和输出端之间的阻抗大于预设阈值时，所述电子设备确定所述反馈电压V＝V1+I*R″，；
当所述主板的输入端和输出端之间的阻抗小于所述预设阈值时，所述电子设备确定所述反馈电压V＝V1。
本申请实施例中的预设阈值可以是经验值，也可以是通过调试得到，本谁申请对此不作具体限定。
本申请实施例中，根据主板的阻抗的不同，向电源提供装置发送的反馈电压也不同，以便于电源提供装置根据反馈电压确定电源提供装置的输出电流，能够避免因为除主板以外的充电回路的阻抗增大时不能够及时调整电流的问题，同时也能够避免因为主板的阻抗持续快速地增加而未考虑主板的阻抗所导致的主板的严重发热甚至主板烧毁的问题。
本申请实施例还提供一种电子设备800，如图8所示，包括主板810和控制器820。
主板810，所述主板的输入端与充电接口的输出端相连，所述主板的输出端与电池的输入端相连。
控制器820，用于执行以下操作：在为所述电池充电的过程中，所述电子设备确定所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV；根据所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV，确定反馈电压V，其中，所述反馈电压V满足：V1＜V≤(V1+ΔV)；所述电子设备向所述电源提供装置发送所述反馈电压，以便所述电源提供装置根据所述反馈电压调整所述电源提供装置的输出电流。
本申请实施例中的电子设备可以为手机，也可以为pad，还可以为其他具有快充性能的电子设备，本申请实施例对此不作具体限定。
本申请实施例提供的电子设备800，通过执行充电电流控制方法600，能够避免因为主板的阻抗增加而盲目的调整快充电流或退出快速充电模式。
可选地，在一些实施例中，所述反馈电压为V＝V1+ΔV。
可选地，在一些实施例中，所述反馈电压为V＝V1+I*R″，其中，I表示所述电子设备从所述电源提供装置接收到的输入电流，R″为固定值，或基于所述主板的输入端和的输出端之间的阻抗确定。
可选地，在一些实施例中，在所述确定反馈电压之前，所述控制器还用于：确定所述主板的输入端和输出端之间的阻抗；所述控制器具体用于：当所述主板的输入端和输出端之间的阻抗大于预设阈值时，确定所述反馈电压V＝V1+I*R″，；当所述主板的输入端和输出端之间的阻抗小于所述预设阈值时，确定所述反馈电压V＝V1。
上述实施例从电子设备说明了本申请的方案，以下结合图9-12从电源提供装置对本申请的方案进行说明。
如图9所示，本申请实施例提供一种充电电流控制方法900，所述方法900可以包括步骤910-920。
910，接收电子设备确定的目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为所述电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供 装置的输出端和所述电池的输入端之间的总阻抗。
920，根据所述目标阻抗调整所述电源提供装置的输出电流。
可选地，在一些实施例中，所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示所述电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电源提供装置提供的输出电流。
可选地，在一些实施例中，所述目标阻抗R＝(V0-(V1+I*R″))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电源提供装置提供的输出电流，R″为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
本申请实施例还提供一种电源提供装置1000，如图10所示，所述电源提供装置1000包括输出电路1010和控制器1020。
输出电路1010，所述输出电路1010用于向所述电子设备提供输出电流。控制器1020，所述控制器1020用于接收电子设备确定的目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为所述电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，所述目标阻抗小于所述电源提供装置的输出端和所述电池的输入端之间的总阻抗；根据所述目标阻抗调整所述电源提供装置的输出电流。
可选地，在一些实施例中，所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电源提供装置提供的输出电流。
可选地，在一些实施例中，所述目标阻抗R＝(V0-(V1+I*R″))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电源提供装置提供的输出电流，R″为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
本申请实施例提供一种充电电流控制方法1100，如图11所示，所述方法1100可以包括步骤1110-1120。
1110，接收所述电子设备确定的反馈电压V，所述反馈电压V满足：V1＜V≤(V1+ΔV)，其中，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差。
1120，根据所述反馈电压调整电源提供装置的输出电流。
可选地，在一些实施例中，所述反馈电压V＝V1+ΔV。
可选地，在一些实施例中，所述反馈电压V＝V1+I*R″，其中，I表示所述电源提供装置提供的输出电流，R″为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
本申请实施例还提供一种电源提供装置1200，如图12所示，所述装置1200包括输出电路1210和控制器1220。
输出电路1210，所述输出电路1210用于向所述电子设备提供输出电流。
控制器1220，所述控制器1220用于接收所述电子设备确定的反馈电压V，所述反馈电压V满足：V1＜V≤(V1+ΔV)，其中，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差；根据所述反馈电压调整电源提供装置的输出电流。
可选地，在一些实施例中，所述反馈电压V＝V1+ΔV。
可选地，在一些实施例中，所述反馈电压为V＝V1+I*R″，其中，I表示所述电源提供装置提供的输出电流，R″为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
本申请实施例还提供了一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令设置为执行上述充电电流控制方法200、600、900或1100中的任何一种方法。
本申请实施例还提供了一种计算机程序产品，所述计算机程序产品包括存储在计算机可读存储介质上的计算机程序，所述计算机程序包括程序指令，当所述程序指令被计算机执行时，使所述计算机执行上述充电电流控制方法200、600、900或1100中的任何 一种方法。
本申请实施例的方案可以应用在有线充电过程中。
下面结合图13-图14，对本申请实施例应用的有线充电过程进行描述。
图13是本申请实施例提供的一种充电系统的示意性结构图。该充电系统包括电源提供装置10、电池管理电路20和电池30。电池管理电路20可用于对电池30进行管理。
作为一个示例，电池管理电路20可以对电池30的充电过程进行管理，比如选择充电通道、控制充电电压和/或充电电流等；作为另一个示例，电池管理电路20可以对电池30的电芯进行管理，如均衡电池30中的电芯的电压等。
电池管理电路20可以包括第一充电通道21和通信控制电路23。
第一充电通道21可用于接收电源提供装置10提供的充电电压和/或充电电流，并将充电电压和/或充电电流加载在电池30的两端，为电池30进行充电。该第一充电通道21可以理解为上文描述的充电通道，可用于对电池30进行充电。
第一充电通道21例如可以是一根导线，也可以在第一充电通道21上设置一些与充电电压和/或充电电流变换无关的其他电路器件。例如，电源管理电路20包括第一充电通道21和第二充电通道，第一充电通道21上可以设置用于充电通道间切换的开关器件(具体参见图14的描述)。
本申请实施例中，对电源提供装置10的类型不做具体限定。例如，该电源提供装置10可以是适配器和移动电源(power bank)等专门用于充电的设备，也可以是电脑等能够提供电源和数据服务的其他设备。
第一充电通道21可以为直充通道，可以将电源提供装置10提供的充电电压和/或充电电流直接加载在电池30的两端。为了实现直充充电方式，本申请实施例在电池管理电路20中引入了具有通信功能的控制电路，即通信控制电路23。该通信控制电路23可以在直充过程中与电源提供装置10保持通信，以形成闭环反馈机制，使得电源提供装置10能够实时获知电池的状态，从而不断调整向第一充电通道注入的充电电压和/或充电电流，以保证电源提供装置10提供的充电电压和/或充电电流的大小与电池30当前所处的充电阶段相匹配。
例如，该通信控制电路23可以在电池30的电压达到恒流阶段对应的充电截止电压时，与电源提供装置10进行通信，使得电源提供装置10对电池30的充电过程从恒流充电转换为恒压充电。又例如，该通信控制电路23可以在电池30的充电电流达到恒压阶段对应的充电截止电流时，与电源提供装置10进行通信，使得电源提供装置10对电池30的充电过程从恒压充电转换为恒流充电。
本申请实施例提供的电池管理电路能够对电池进行直充，换句话说，本申请实施例提供的电池管理电路是支持直充架构的电池管理电路，在直充架构中，直充通道上无需设置变换电路，从而能够降低待充电设备在充电过程的发热量。可选地，在一些实施例中，如图14所示，电池管理电路20还可包括第二充电通道24。第二充电通道24上设置有升压电路25。在电源提供装置10通过第二充电通道24为电池30充电的过程中，升压电路25可用于接收电源提供装置10提供的初始电压，将初始电压升压至目标电压，并基于目标电压为电池30充电，其中初始电压小于电池30的总电压，目标电压大于电池30的总电压；通信控制电路23还可用于控制第一充电通道21和第二充电通道24之间的切换。
假设该电池30包括多节电芯，该第二充电通道24能够兼容普通的电源提供装置为该电池30进行充电，解决了普通电源提供装置无法为多节电池进行充电的问题。
对于包含多节电芯的电池30来说，电池管理电路20还可以包括均衡电路22，参见上文的描述，该均衡电路22可用于在电池的充电过程和/或放电过程中均衡多节电芯的电压。
本申请实施例对升压电路25的具体形式不作限定。例如，可以采用Boost升压电路， 还可以采用电荷泵进行升压。可选地，在一些实施例中，第二充电通道24可以采用传统的充电通道设计方式，即在第二充电通道24上设置变换电路(如充电IC)。该变换电路可以对电池30的充电过程进行恒压、恒流控制，并根据实际需要对电源提供装置10提供的初始电压进行调整，如升压或降压。本申请实施例可以利用该变换电路的升压功能，将电源提供装置10提供的初始电压升压至目标电压。
通信控制电路23可以通过开关器件实现第一充电通道21和第二充电通道24之间的切换。具体地，如图14所示，第一充电通道21上可以设置有开关管Q5，当通信控制电路23控制开关管Q5导通时，第一充电通道21工作，对电池30进行直充；当通信控制电路23控制开关管Q5关断时，第二充电通道24工作，采用第二充电通道24对电池30进行充电。其中，本申请实施例中的开关管Q5可以为MOS管，也可以为开关。
在另外一些实施例中，也可在第二充电通道24上设置用于降压的电路或器件，当电源提供装置提供的电压高于电池30的需求电压时，可进行降压处理。本申请实施例，对第二充电通道24包含的电路或模块不进行限制。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其他任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如数字视频光盘(digital video disc，DVD))、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
当用于本申请中时，虽然术语“第一”、“第二”等可能会在本申请中使用以描述各设备，但这些设备不应受到这些术语的限制。这些术语仅用于将一个设备与另一个设备区别开。比如，在不改变描述的含义的情况下，第一设备可以叫做第二设备，并且同样地，第二设备可以叫做第一设备，只要所有出现的“第一设备”一致重命名并且所有出现的“第二设备”一致重命名即可。第一设备和第二设备都是设备，但可以不是相同的设备。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (29)

  1. 一种充电电流控制方法，其特征在于，所述方法用于电子设备，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，
    所述方法包括：
    在为所述电池充电的过程中，所述电子设备确定目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗；
    所述电子设备向所述电源提供装置发送指示信息，所述指示信息指示所述电源提供装置根据所述目标阻抗调整所述电源提供装置的输出电流。
  2. 根据权利要求1所述的方法，其特征在于，所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示所述电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电子设备从所述电源提供装置接收到的输入电流。
  3. 根据权利要求1所述的方法，其特征在于，所述目标阻抗为R＝(V0-(V1+I*R”))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电子设备从所述电源提供装置接收到的输入电流，R”为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
  4. 根据权利要求3所述的方法，其特征在于，在所述电子设备确定目标阻抗之前，还包括：
    确定所述主板的输入端和输出端之间的阻抗；
    所述确定所述目标阻抗包括：
    当所述主板的输入端和输出端之间的阻抗大于预设的预设阈值时，将所述目标阻抗确定为R＝(V0-(V1+I*R”))/I；
    当所述主板的输入端和输出端之间的阻抗小于或等于所述预设阈值时，将所述目标阻抗确定为R＝(V0-V1)/I。
  5. 一种电子设备，其特征在于，包括：
    主板，所述主板的输入端与充电接口的输出端相连，所述主板的输出端与电池的输入端相连；
    控制器，用于执行以下操作：
    在为所述电池充电的过程中，所述电子设备确定目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗；
    所述电子设备向所述电源提供装置发送指示信息，所述指示信息指示所述电源提供装置根据所述目标阻抗调整所述电源提供装置的输出电流。
  6. 根据权利要求5所述的电子设备，其特征在于所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电子设备从所述电源提供装置接收到的输入电流。
  7. 根据权利要求5所述的电子设备，其特征在于，所述目标阻抗为R＝(V0-(V1+I*R”))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电子设备从所述电源提供装置接收到的输入电流，R”为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
  8. 根据权利要求7所述的电子设备，其特征在于，在所述确定目标阻抗之前，所述控制器还用于：
    确定所述主板的输入端和输出端之间的阻抗；
    所述控制器具体用于：
    当所述主板的输入端和输出端之间的阻抗大于预设的预设阈值时，将所述目标阻抗确定为R＝(V0-(V1+I*R”))/I；
    当所述主板的输入端和输出端之间的阻抗小于或等于所述预设阈值时，将所述目标阻抗确定为R＝(V0-V1)/I。
  9. 一种充电电流控制方法，其特征在于，所述方法用于电子设备，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，
    所述方法包括：
    在为所述电池充电的过程中，所述电子设备确定所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV；
    根据所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV，确定反馈电压V，其中，所述反馈电压V满足：V1＜V≤(V1+ΔV)；
    所述电子设备向所述电源提供装置发送所述反馈电压，以便所述电源提供装置根据所述反馈电压调整所述电源提供装置的输出电流。
  10. 根据权利要求9所述的方法，其特征在于，所述反馈电压为V＝V1+ΔV。
  11. 根据权利要求9所述的方法，其特征在于，所述反馈电压为V＝V1+I*R”，其中，I表示所述电子设备从所述电源提供装置接收到的输入电流，R”为固定值，或基于所述主板的输入端和的输出端之间的阻抗确定。
  12. 根据权利要求11所述的方法，其特征在于，在所述确定反馈电压之前，还包括：
    确定所述主板的输入端和输出端之间的阻抗；
    所述确定反馈电压，包括：
    当所述主板的输入端和输出端之间的阻抗大于预设阈值时，确定所述反馈电压V＝V1+I*R”；
    当所述主板的输入端和输出端之间的阻抗小于所述预设阈值时，确定所述反馈电压V＝V1。
  13. 一种电子设备，其特征在于，包括：
    主板，所述主板的输入端与充电接口的输出端相连，所述主板的输出端与电池的输入端相连；
    控制器，用于执行以下操作：
    在为所述电池充电的过程中，所述电子设备确定所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV；
    根据所述电池的输入端的电压V1以及所述主板的输入端和输出端的电压差ΔV，确定反馈电压V，其中，所述反馈电压V满足：V1＜V≤(V1+ΔV)；
    所述电子设备向所述电源提供装置发送所述反馈电压，以便所述电源提供装置根据所述反馈电压调整所述电源提供装置的输出电流。
  14. 根据权利要求13所述的电子设备，其特征在于
    所述反馈电压V＝V1+ΔV。
  15. 根据权利要求13所述的电子设备，其特征在于，所述反馈电压V＝V1+I*R”，其中，I表示所述电子设备从所述电源提供装置接收到的输入电流，R”为固定值，或基于所述主板的输入端和的输出端之间的阻抗确定。
  16. 根据权利要求15所述的电子设备，其特征在于，在所述确定反馈电压之前，所述控制器还用于：
    确定所述主板的输入端和输出端之间的阻抗；
    所述控制器具体用于：
    当所述主板的输入端和输出端之间的阻抗大于预设阈值时，确定所述反馈电压V＝ V1+I*R”；
    当所述主板的输入端和输出端之间的阻抗小于所述预设阈值时，确定所述反馈电压V＝V1。
  17. 一种充电电流控制方法，其特征在于，所述方法用于电子设备，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，
    所述方法包括：
    接收电子设备确定的目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗，；
    根据所述目标阻抗调整所述电源提供装置的输出电流。
  18. 根据权利要求17所述的方法，其特征在于，所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示所述电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电源提供装置的输出电流。
  19. 根据权利要求17所述的方法，其特征在于，所述目标阻抗R＝(V0-(V1+I*R”))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电源提供装置的输出电流，R”为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
  20. 一种电源提供装置，其特征在于，所述电源提供装置用于为电子设备的电池充电，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，所述电源提供装置包括：
    输出电路，用于向所述电子设备提供输出电流；
    控制器，用于接收电子设备确定的目标阻抗，所述目标阻抗包括第一阻抗和第二阻抗，所述第一阻抗为所述电源提供装置的输出端和所述主板的输入端之间的阻抗，所述第二阻抗为所述主板的输出端与所述电池的输入端之间的阻抗；根据所述目标阻抗调整所述电源提供装置的输出电流。
  21. 根据权利要求20所述的电源提供装置，其特征在于，所述目标阻抗为R＝(V0-(V1+ΔV))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差，I表示所述电源提供装置的输出电流。
  22. 根据权利要求20所述的电源提供装置，其特征在于，所述目标阻抗R＝(V0-(V1+I*R”))/I，其中，V0表示电源提供装置的输入电压，V1表示所述电池的输入端的电压，I表示所述电源提供装置的输出电流，R”为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
  23. 一种充电电流控制方法，其特征在于，所述方法用于电子设备，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的输出端相连，所述主板的输出端与所述电池的输入端相连，所述方法包括：
    接收所述电子设备确定的反馈电压V，所述反馈电压V满足：V1＜V≤(V1+ΔV)，其中，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差；
    根据所述反馈电压调整电源提供装置的输出电流。
  24. 根据权利要求23所述的方法，其特征在于，所述反馈电压为V＝V1+ΔV。
  25. 根据权利要求23所述的方法，其特征在于，所述反馈电压为V＝V1+I*R”，其中，I表示所述电源提供装置的输出电流，R”为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
  26. 一种电源提供装置，其特征在于，所述电源提供装置用于为电子设备的电池充电，所述电子设备包括电池、主板以及充电接口，所述主板的输入端与所述充电接口的 输出端相连，所述主板的输出端与所述电池的输入端相连，所述电源提供装置包括：
    输出电路，用于向所述电子设备提供输出电流；
    控制器，用于接收所述电子设备确定的反馈电压V，所述反馈电压V满足：V1＜V≤(V1+ΔV)，其中，V1表示所述电池的输入端的电压，ΔV表示所述主板的输入端和输出端的电压差；根据所述反馈电压调整电源提供装置的输出电流。
  27. 根据权利要求26所述的电源提供装置，其特征在于，所述反馈电压为V＝V1+ΔV。
  28. 根据权利要求26所述的电源提供装置，其特征在于，所述反馈电压为V＝V1+I*R”，其中，I表示所述电源提供装置的输出电流，R”为固定值，或基于所述主板的输入端和输出端之间的阻抗确定。
  29. 一种计算机可读存储介质，其特征在于，包括：存储有计算机可执行指令，所述计算机可执行指令设置为执行权利要求1至4或9至12或17至19或23至25中任一项所述的方法。
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