Charging method, device and electronic equipment

Abstract

The present application discloses a charging method, device and electronic device, belonging to the field of charging technology. The charging method comprises: obtaining the current charging cut-off voltage of the battery when charging the battery with a preset current; and charging with the current charging voltage when the preset current and the current charging cut-off voltage meet preset conditions. By obtaining the actual charging cut-off voltage of the battery and setting a suitable charging voltage in the constant voltage stage, the occurrence of slow charging or false charging is avoided, and the adaptability of flash charging is enhanced, so that charging is fast and safe.

Description

Technical Field

[0001] The present application belongs to the field of charging technology, and specifically relates to a charging method, device and electronic equipment. Background Art

[0002] With the development of communication technology, portable electronic devices have more and more functions, consume more and more power, and users' demand for charging speed is gradually increasing. Electronic devices basically use lithium-ion batteries, and lithium-ion battery charging mainly has two charging stages: constant current and constant voltage. The improvement of charging efficiency is more obvious for the constant current stage speed increase, but the constant voltage stage charging time is longer during the entire charging process. In order to increase the charging speed in the constant voltage stage, some examples use flash fast charge (FFC) technology, which is a polarization impedance voltage supplementary charging method, that is, fast charging is performed by appropriately raising the constant current cut-off voltage and increasing the constant voltage cut-off current.

[0003] However, in FFC technology, by setting a suitable fixed constant current cut-off voltage and a fixed constant voltage cut-off current, due to the influence of various factors such as aging and temperature, the set constant current cut-off voltage and constant voltage cut-off current cannot make the charging at the optimal value. If they are set too low, the charging speed will be affected. If they are set too high, it is easy to overcharge and cause safety hazards. Summary of the invention

[0004] The embodiments of the present application provide a charging method, device and electronic device, which can solve the problem of slow charging speed or safety hazard caused by overcharging due to the inability to accurately set the constant current cut-off voltage and the constant voltage cut-off current in the prior art.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, a charging method is provided, comprising: obtaining a current charging cut-off voltage of the battery when charging the battery with a preset current;

[0007] When the preset current and the current charging cut-off voltage meet a preset condition, charging is performed at the current charging voltage.

[0008] In a second aspect, a charging device is provided, comprising:

[0009] An acquisition module, used for acquiring a current charging cut-off voltage of the battery when the battery is charged with a preset current;

[0010] The charging module is used for charging with a current charging voltage when the preset current and the current charging cut-off voltage meet preset conditions.

[0011] In a third aspect, an electronic device is provided, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the first aspect.

[0012] In a fourth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented.

[0013] In a fifth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect.

[0014] In the embodiment of the present application, the current charging cut-off voltage of the battery is first obtained when the battery is charged with a preset current, and then the battery is charged with the current charging voltage when the preset current and the current charging cut-off voltage meet the preset conditions. In the embodiment of the present application, by obtaining the actual charging cut-off voltage of the battery and setting a suitable charging voltage in the constant voltage stage, the situation of slow charging or false charging is avoided, and the adaptability of flash charging is enhanced, so that charging is fast and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 is a flow chart of a charging method provided by an embodiment of the present application;

[0017] Figure 2 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application;

[0018] Figure 3 It is a schematic diagram of a measurement structure of a path impedance between a battery connector and a battery cell provided by an embodiment of the present application;

[0019] Figure 4 is a schematic diagram of an electronic device provided by an embodiment of the present application;

[0020] Figure 5 It is a schematic diagram of the hardware structure of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here. In addition, the "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0023] The following is combined with Figure 1-5 , the charging method, device and electronic device provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0024] like Figure 1 As shown, an embodiment of the present application provides a charging method, which may include: the contents shown in step S102 to step S104.

[0025] In step S102, when the battery is charged with a preset current, the current charging cut-off voltage of the battery is obtained.

[0026] The charging cut-off voltage may be related to the temperature, battery activity, etc. In this embodiment, the charging voltage of the battery is determined by obtaining the current voltage of the battery to avoid slow charging or overcharging.

[0027] In step S104, when the preset current and the current charge cut-off voltage meet the preset conditions, charging is performed with the current charge voltage.

[0028] In the embodiment of the present application, the current charging cut-off voltage of the battery is first obtained when the battery is charged with a preset current, and then the battery is charged with the current charging voltage when the preset current and the current charging cut-off voltage meet the preset conditions. In the embodiment of the present application, by obtaining the actual charging cut-off voltage of the battery and setting a suitable charging voltage in the constant voltage stage, the situation of slow charging or false charging is avoided, and the adaptability of flash charging is enhanced, so that charging is fast and safe.

[0029] In a possible implementation manner of the present application, obtaining the current charging cut-off voltage of the battery includes the following steps.

[0030] Obtain a path impedance value of the battery; and determine a current charging cutoff voltage based on the path impedance value and a preset cutoff voltage of the battery.

[0031] The cut-off voltage is related to the internal impedance of the battery. However, due to problems such as battery aging, the actual path impedance value of the battery is different from the given value. In order to set an accurate charging cut-off voltage, it is necessary to re-obtain the path impedance value of the battery during charging to determine the current charging cut-off voltage.

[0032] Specifically, Figure 2 The electronic device may include a battery module and a circuit board, the battery module includes a battery cell, a battery protection board and a first battery connector; the circuit board includes a second battery connector, a charging chip module and a processor.

[0033] Among them, the battery cell is connected to the first end of the battery protection board, the second end of the battery protection board is connected to the first battery connector, the first battery connector is connected to the second battery connector, the second battery connector is connected to the charging chip module, the charging chip module is connected to the processor, and the processor is used for related control during charging.

[0034] like Figure 3 The figure shows the structure diagram of the impedance measurement between the battery connector and the battery cell. Rab is the equivalent impedance from the battery connector BAT+ to the battery cell P+; Rbc is the equivalent impedance from the battery connector BAT+ to the VBAT pin at point c of the charging chip; the battery voltage detection VBAT_SENSE detects the BAT+ and BAT- of the battery connector, and actively detects the impedance Req between the battery cell and the battery connector during charging, Req=Rab+Rde.

[0035] The specific method for determining the current charging cut-off voltage is as follows.

[0036] First, the voltage U0 of the battery connector when not charging is detected.

[0037] Then, a charging pulse with a current It is sent through the battery cell, and then the voltage U1 of the battery connector during the charging pulse is detected.

[0038] The battery path impedance R is calculated by the following formula:

[0039] R=(U1-U0) / It

[0040] Then calculate the battery change ΔV based on the path impedance value R:

[0041] ΔV=RIt

[0042] Finally, the current charging cut-off voltage is determined according to the change value and the preset cut-off voltage of the battery, as shown below:

[0043] V_stop = V_nor + ΔV

[0044] Wherein, V_stop is the current charging cut-off voltage of the battery, and V_nor is the preset cut-off voltage of the battery.

[0045] To make the measurement more accurate, multiple measurements can be taken and then filtered and averaged to obtain the final R, that is, the above-mentioned Req.

[0046] In a possible implementation manner of the present application, when the preset current and the current charging cut-off voltage meet the preset conditions, charging is performed at the current charging voltage, including the following steps.

[0047] Determine the current charging voltage of the battery according to the preset current, the path impedance value, and the preset cut-off voltage; if the current charging voltage is greater than or equal to the current charging cut-off voltage, charge at the current charging voltage.

[0048] That is, according to the determined path impedance value, preset current, and preset cut-off voltage, the current charging voltage V of the battery can be determined, V = V_nor + Ichg * R, where Ichg is the preset current. Then, according to the judgment of the current charging voltage and the current charging cut-off voltage, it is judged whether to charge the battery at the current charging voltage.

[0049] That is, when the charging voltage reaches the charging cut-off voltage, the constant voltage stage is entered. The voltage in this stage is constant, and the charging current gradually decreases. At this time, there is no need to continue to increase the voltage to avoid damaging the battery.

[0050] In a possible implementation manner of the present application, the charging method may further include the following steps.

[0051] Determine the current charging cut-off current of the battery according to the temperature of the battery; end the charging when the charging current of the battery is less than the current charging cut-off current.

[0052] In this embodiment, due to the different temperatures of the battery, the charging cut-off currents of the battery are different. The charging cut-off currents corresponding to different temperatures can be determined according to the battery cells and temperature characteristics of the battery. Since the charging current gradually decreases after entering the constant voltage charging, when the charging current is less than the charging cut-off current, charging will stop and the charging ends.

[0053] Further, determining the current charging cut-off current of the battery according to the temperature of the battery may include the following steps.

[0054] Determine the current charging cut-off current of the battery according to the temperature of the battery and the pre-established correspondence between temperature and charging cut-off current, wherein the pre-established correspondence between temperature and charging cut-off current is related to the type of the battery.

[0055] That is, the test can be performed according to the type of battery, and the corresponding relationship between the temperature and the charge cut-off current can be established in advance. The following is the corresponding relationship between the temperature and the charge cut-off current of a certain battery.

[0056]

[0057] Where f(t) is the charge cut-off current and t is the temperature.

[0058] Optionally, an embodiment of the present application further provides a charging device, which may include: an acquisition module and a charging module.

[0059] Among them, the acquisition module is used to obtain the current charging cut-off voltage of the battery when the battery is charged with a preset current; the charging module is used to charge with the current charging voltage when the preset current and the current charging cut-off voltage meet preset conditions.

[0060] In the embodiment of the present application, the acquisition module first acquires the current charging cut-off voltage of the battery when charging the battery with a preset current, and then the charging module charges with the current charging voltage when the preset current and the current charging cut-off voltage meet the preset conditions. In the embodiment of the present application, by acquiring the actual charging cut-off voltage of the battery and setting a suitable charging voltage in the constant voltage stage, the occurrence of slow charging or false charging is avoided, and the adaptability of flash charging is enhanced, so that charging is fast and safe.

[0061] In a possible implementation manner of the present application, the acquisition module includes: a first acquisition unit and a first determination unit.

[0062] The first acquisition unit is used to acquire the path impedance value of the battery; the first determination unit is used to determine the current charging cut-off voltage according to the path impedance value and the preset cut-off voltage of the battery.

[0063] In a possible implementation manner of the present application, the charging module includes: a second determination unit and a third determination unit.

[0064] Among them, the second determination unit is used to determine the current charging voltage of the battery according to the preset current, the path impedance value and the preset cut-off voltage; the third determination unit is used to charge with the current charging voltage if the current charging voltage is greater than or equal to the current charging cut-off voltage.

[0065] In a possible implementation manner of the present application, the charging device may further include: a determination module and an execution module.

[0066] The determination module is used to determine the current charging cut-off current of the battery according to the temperature of the battery; and the execution module is used to terminate the charging when the charging current of the battery is less than the current charging cut-off current.

[0067] The charging device provided in the embodiment of the present application can achieve Figure 1-3 To avoid repetition, the various processes of the method embodiment shown are not described again here.

[0068] Alternatively, if Figure 4 As shown, an embodiment of the present application also provides an electronic device 400, including a processor 401, a memory 402, and a program or instruction stored in the memory 402 and executable on the processor 401. When the program or instruction is executed by the processor 401, each process of the above-mentioned charging method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0069] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0070] Figure 5 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of the present application.

[0071] The electronic device 100 includes but is not limited to components such as a radio frequency unit 101, a network module 102, an audio output unit 103, an input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, and a processor 110.

[0072] Those skilled in the art will appreciate that the electronic device 100 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 110 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Figure 5 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0073] The processor 110 is used to obtain the current charging cut-off voltage of the battery when the battery is charged with a preset current; and to charge with the current charging voltage when the preset current and the current charging cut-off voltage meet preset conditions.

[0074] In the embodiment of the present application, the current charging cut-off voltage of the battery is first obtained when the battery is charged with a preset current, and then the battery is charged with the current charging voltage when the preset current and the current charging cut-off voltage meet the preset conditions. In the embodiment of the present application, by obtaining the actual charging cut-off voltage of the battery and setting a suitable charging voltage in the constant voltage stage, the situation of slow charging or false charging is avoided, and the adaptability of flash charging is enhanced, so that charging is fast and safe.

[0075] It should be understood that in the embodiment of the present application, the input unit 104 may include a graphics processor (Graphics Processing Unit, GPU) 1041 and a microphone 1042, and the graphics processor 1041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 107 includes a touch panel 1071 and other input devices 1072. The touch panel 1071 is also called a touch screen. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Other input devices 1072 may include but are not limited to a physical keyboard, a function key (such as a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which will not be repeated here. The memory 109 can be used to store software programs and various data, including but not limited to applications and operating systems. The processor 110 can integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, the user interface, and the application program, etc., and the modem processor mainly processes wireless communication. It is understandable that the above-mentioned modem processor may not be integrated into the processor 110.

[0076] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned charging method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0077] The processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0078] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned charging method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0079] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0080] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0081] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0082] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A charging method, characterized in that: include: When charging the battery with a preset current, obtaining a current charging cut-off voltage of the battery; When the preset current and the current charging cut-off voltage meet a preset condition, charging with the current charging voltage; Wherein, the obtaining of the current charging cut-off voltage of the battery comprises: obtaining a path impedance value of the battery, where the path impedance value of the battery refers to a path impedance value between a battery connector and a battery cell; determining the current charging cut-off voltage according to the path impedance value and a preset cut-off voltage of the battery; The method of charging with the current charging voltage when the preset current and the current charging cut-off voltage meet preset conditions includes: determining the current charging voltage of the battery according to the preset current, the path impedance value and the preset cut-off voltage; and charging with the current charging voltage if the current charging voltage is greater than or equal to the current charging cut-off voltage.

2. The charging method according to claim 1, characterized in that: The method further comprises: Determining a current charging cut-off current of the battery according to the temperature of the battery; When the charging current of the battery is less than the current charging cut-off current, charging is terminated.

3. The charging method according to claim 2, characterized in that: The step of determining the current charging cut-off current of the battery according to the temperature of the battery comprises: The current charging cut-off current of the battery is determined according to the temperature of the battery and a pre-established correspondence between the temperature and the charging cut-off current, wherein the pre-established correspondence between the temperature and the charging cut-off current is related to the type of the battery.

4. A charging device, characterized in that: include: An acquisition module, used for acquiring a current charging cut-off voltage of the battery when the battery is charged with a preset current; A charging module, configured to charge at a current charging voltage when the preset current and the current charging cut-off voltage meet a preset condition; Wherein, the acquisition module includes: A first acquisition unit, configured to acquire a path impedance value of the battery, wherein the path impedance value of the battery refers to a path impedance value between a battery connector and a battery cell; A first determining unit, configured to determine the current charging cut-off voltage according to the path impedance value and a preset cut-off voltage of the battery; The charging module comprises: A second determining unit, configured to determine a current charging voltage of the battery according to the preset current, the path impedance value and the preset cut-off voltage; The third determining unit is configured to charge with the current charging voltage if the current charging voltage is greater than or equal to the current charging cut-off voltage.

5. The device according to claim 4, characterized in that The device also includes: A determination module, used to determine a current charging cut-off current of the battery according to a temperature of the battery; The execution module is used to terminate the charging when the charging current of the battery is less than the current charging cut-off current.

6. The device according to claim 5, characterized in that The determination module is used for: The current charging cut-off current of the battery is determined according to the temperature of the battery and a pre-established correspondence between the temperature and the charging cut-off current, wherein the pre-established correspondence between the temperature and the charging cut-off current is related to the type of the battery.

7. An electronic device, characterized in that: The electronic device comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method according to any one of claims 1 to 3.

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