CN109713746B

CN109713746B - Charging circuit, charging control method and mobile terminal

Info

Publication number: CN109713746B
Application number: CN201811558359.5A
Authority: CN
Inventors: 范建功
Original assignee: Zhuzhou Gexin Electric Technology Co ltd
Current assignee: Zhuzhou Gexin Electric Technology Co ltd
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2023-01-13
Anticipated expiration: 2038-12-19
Also published as: CN109713746A

Abstract

The invention discloses a charging circuit, a charging control method and a mobile terminal.A charging circuit is provided with two charging branches, the total impedance difference of the two charging branches is larger, when the electric quantity of a battery to be charged is lower, the charging branch with larger impedance is adopted for charging, and if the electric quantity of the battery to be charged is equal to or more than the electric quantity, the charging branch with smaller impedance is selected for charging.

Description

Charging circuit, charging control method and mobile terminal

Technical Field

The invention relates to the technical field of touch control, in particular to a charging circuit, a charging control method and a mobile terminal.

Background

Along with continuous aging of a terminal manufacturing process, functions of a terminal mobile phone are more and more abundant, the dependence degree of a terminal user on the mobile phone is higher and higher once the utilization rate is high, the demand on a battery is higher and higher, along with the increase of the frequency of using the mobile phone by the user, charging once a day or charging several times a day is common, and the user has more and more requirements on the charging speed, particularly, various mobile phone manufacturers use a quick charger to realize the quick charging effect at present, although the charging speed of each manufacturer meets the requirements of the user, the negative problems caused by high-speed charging are not solved, namely the heating rate is high, the existing charging scheme which is most used is a high-pass charging scheme, most of the general scheme is realized by using QC3.0/QC2.0 and the like, and the modes usually bring obvious heating phenomena, so that the user experience is greatly influenced.

Disclosure of Invention

The embodiment of the invention provides a charging circuit, a charging control method and a mobile terminal, and aims to solve the technical problem that the existing high-speed charging circuit is too serious in heating, so that the use experience of a user is poor.

In order to solve the above technical problem, an embodiment of the present invention provides a charging circuit, where the charging circuit includes: the circuit comprises a power supply interface, a first charging branch circuit, a second charging branch circuit and a logic circuit, wherein the first charging branch circuit and the second charging branch circuit are respectively connected with the power supply interface, and the logic circuit is used for controlling the first charging branch circuit or the second charging branch circuit to charge a battery to be charged;

during charging, the charging circuit detects the electric quantity percentage of the battery to be charged in real time;

if the electric quantity percentage is in a low electric quantity state, the logic circuit is connected with the first charging branch circuit to charge the battery to be charged;

and if the electric quantity percentage is more than the medium electric quantity state, the logic circuit is connected with the second charging branch circuit or the charging circuit is switched from the first charging branch circuit to the second charging branch circuit to charge the battery to be charged.

Optionally, the second charging branch includes a charging management chip WP, a PMOS transistor and a transistor Q1 connected in series in sequence, and an auxiliary electronic device connected in series/parallel between the charging management chip WP, the PMOS transistor and the transistor Q1.

Optionally, in the charging process, the charging management chip WP collects the electric quantity percentage of the battery to be charged and/or the charging current of the first charging branch in real time, and if the electric quantity percentage and/or the charging current meet the switching condition of the charging management chip WP, the logic circuit is controlled to switch to the second charging branch to work.

Optionally, the controlling the logic circuit to switch to the second charging branch to operate includes:

and the triode Q1 is switched on, the grid electrode of the triode Q1 is controlled to output high potential to realize conduction, the low potential state of the base electrode of the PMOS tube is kept, and the source electrode of the PMOS tube obtains high potential to realize conduction after passing through the auxiliary electronic device.

Optionally, the PMOS transistor is a PMOS transistor combination formed by connecting N PMOS transistors in a series-parallel connection manner, and N is greater than or equal to 1.

Optionally, the first charging branch includes: a power management chip PMI and an MOS tube Q4;

the power management chip PMI is used for detecting the electric quantity percentage of the battery to be charged and switching on the first charging branch circuit to charge through the MOS tube Q4 according to the detection result;

the MOS tube Q4 is further connected with the output end of the second charging branch, and the current output by the second charging branch is used for charging the battery to be charged through the MOS tube Q4.

Optionally, the power supply interface is a type-c charging interface, and the charging circuit detects the percentage of the electric quantity of the battery to be charged in real time and includes: and determining the electric quantity percentage of the battery to be charged by detecting the data of a data interface pin in the type-c charging interface.

Further, an embodiment of the present invention further provides a mobile terminal, including the charging circuit and the battery as described above, where the battery is connected to the first charging branch, and the second charging branch is connected to the battery through an MOS transistor Q4 in the first charging branch.

Further, an embodiment of the present invention further provides a charging control method applied to the charging circuit described above, where the method includes:

detecting the electric quantity percentage of a battery to be charged in a charging state;

if the electric quantity percentage is judged to be smaller than a first preset value, the battery to be charged is in a low electric quantity state, and a first charging branch in the charging circuit is switched on for charging;

and if the electric quantity percentage is judged to be larger than or equal to a first preset value, the battery to be charged is in a medium electric quantity state, and a second charging branch in the charging circuit is switched on for charging.

Optionally, when the charging circuit is charging using the first charging branch, the detecting a percentage of an electric quantity of the battery to be charged further includes:

detecting a charging current of the first charging branch circuit;

and if the charging current meets the switching condition of the second charging branch, switching the charging circuit from the state of switching on the first charging branch to the state of switching on the second charging branch, and charging the battery to be charged through the second charging branch.

The embodiment of the invention has the beneficial effects that:

the embodiment of the invention provides a charging circuit, a charging control method and a mobile terminal, aiming at the defects that the existing high-speed charging circuit scheme can bring obvious heating phenomena and influence user experience, two charging branches are arranged on the charging circuit, the total impedance difference of the two charging branches is large, when the electric quantity of a battery to be charged is low, the charging branch with large impedance is adopted for charging, and if the electric quantity of the battery to be charged is equal to or more than the electric quantity, the charging branch with small impedance is selected for charging.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic diagram of a hardware structure of an alternative mobile terminal for implementing various embodiments of the present invention;

fig. 2 is a schematic structural diagram of a charging circuit according to an embodiment of the present invention;

fig. 3 is another schematic structural diagram of a charging circuit according to an embodiment of the present invention;

fig. 4 is a schematic diagram of another structure of a charging circuit according to an embodiment of the present invention;

fig. 5 is a schematic circuit diagram of a charging circuit according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention;

fig. 7 is a flowchart of a charging control method according to an embodiment of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palm top computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and a fixed terminal such as a Digital TV, a desktop computer, etc., but it should be noted that the above-mentioned terminal is understood to be a terminal provided with two screens, and the two screens may be bent or folded based on the current terminal housing, and may even be flexible dual screens.

The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, wiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following specifically describes the components of the mobile terminal with reference to fig. 1:

the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000 ), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).

WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and can be omitted entirely as needed within the scope not changing the essence of the invention.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is for receiving an audio or video signal. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and can process such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or the backlight when the mobile terminal 100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing gestures of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometers and taps), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.

The display unit 106 is used to display information input by a user or information provided to the user. 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 (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 107 may include other input devices 1072 in addition to the touch panel 1071. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.

Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation on or near the touch panel, the touch panel is transmitted to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 1, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited herein.

The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby integrally monitoring the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.

In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.

Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the circuit structure of the present invention are proposed.

The first embodiment:

for the problem of heat generation of the currently universal QC3.0/QC2.0 charging circuit scheme, an embodiment of the present invention provides a charging circuit that can not only implement charging of the currently available QC3.0/QC2.0, but also reduce the degree of heat generation during charging, specifically, as shown in fig. 2, the charging circuit shown in the drawing is applied to a mobile terminal, and the charging circuit includes a power supply interface 21, a first charging branch 22, and a second charging branch 23, where the first charging branch 22 and the second charging branch 23 are respectively connected to the power supply interface 21.

In this embodiment, when the user is charging the mobile terminal, the charging circuit disposed in the terminal detects the current percentage of the charge capacity of the rechargeable battery, and determines whether the charge capacity is low or high, and if the charge capacity is low, the charging circuit uses the first charging branch 22 in the charging circuit to perform charging, and if the charge capacity is high or medium, the charging circuit uses the second charging branch 23 in the charging circuit to perform charging.

In the present embodiment, the switching or turning on control of the first charging branch 22 and the second charging branch 23 is realized by providing a logic circuit 24, as shown in fig. 3, the logic circuit 24 controls to switch the first charging branch 22 or the second charging branch 23 to be turned on according to the condition of detecting the percentage of the electric quantity.

In this embodiment, the total impedance of the first charging branch 22 is greater than the total impedance of the second charging branch 23, a branch with a large impedance is used for charging, which may generate a high power consumption, that is, a large amount of heat is generated, and the power consumption of a branch with a small impedance may be relatively low, and in practical applications, when the power amount is too low, the first charging branch 22 is preferably selected to realize charging, so that the power amount of the battery can be quickly increased under a small current, and thus the charging mode of the small current may not damage the battery, and after charging to a certain extent, the charging may be performed by switching to the second charging branch 23, so that the quick charging is realized, and the heat consumption due to the impedance can be reduced.

In this embodiment, the charging circuit may further implement the connection or switching of the branch circuit by detecting the charging circuit of the charging circuit, for example, in the process of charging the battery by using the first charging branch circuit 22, when the electric quantity or the voltage reaches a certain degree, that is, the condition of switching is satisfied, the charging branch circuit is switched to the second charging branch circuit 23 to continue charging, so that the conversion consumption of the electric energy can be reduced, and meanwhile, the effect of quick charging can also be achieved.

In this embodiment, the second charging branch 23 includes a charging management chip WP 231, a transistor Q1 and a PMOS transistor 232 connected in series in sequence, and an auxiliary electronic device connected in series/parallel between the charging management chip WP, the PMOS transistor and the transistor Q1, as shown in fig. 4.

In this embodiment, the output end of the PMOS transistor 232 is connected to the charging output of the first charging branch 22, that is, regardless of whether the first charging branch 22 or the second charging branch 23 is used, which is finally connected to the battery for charging, or needs to pass through the first charging branch 22, only when the second charging branch 22 is used, the first charging branch 22 does not play a role of charging, but only plays a role of switch connection.

At this time, in the charging process of the terminal, the charging management chip WP collects the electric quantity percentage of the battery to be charged and/or the charging current of the first charging branch in real time, and if the electric quantity percentage and/or the charging current meet the switching condition of the charging management chip WP, the logic circuit is controlled to be switched to the second charging branch to work.

In this embodiment, when the second charging branch 23 is turned on to operate, the conducting relationship of each module or unit is specifically as follows, and the controlling the logic circuit to switch to the second charging branch includes:

In this embodiment, in order to prevent the second charging branch 23 from being broken down due to an excessive current, the PMOS transistor 232 is a combination of PMOS transistors connected in series-parallel connection by N PMOS transistors, where N is greater than or equal to 1, and such a combination PMOS transistor can form a shunting function of a large current to prevent a single MOS transistor from being burned out.

In this embodiment, the first charging branch 22 includes: a power management chip PMI 221 and a MOS tube Q4;

the power management chip PMI 221 is configured to detect an electric quantity percentage of the battery to be charged, and switch on the first charging branch 22 to charge through the MOS transistor Q4 222 according to a detection result;

the MOS transistor Q4 222 is further connected to an output end of the second charging branch 23, and the current output by the second charging branch 23 charges the battery to be charged through the MOS transistor Q4 222.

In this embodiment, the power supply interface 21 is a type-c charging interface, and the real-time detection of the percentage of the electric quantity of the battery to be charged by the charging circuit includes: and determining the electric quantity percentage of the battery to be charged by detecting the data of the data port pin in the type-c charging interface.

The charging circuit that this embodiment provided, through set up two branch circuits of charging on charging circuit, and the total impedance phase difference of two branch circuits of charging is great, when the electric quantity of treating rechargeable battery is lower, adopt the great branch circuit of charging of impedance to charge, if the electric quantity of treating rechargeable battery is medium or more than, select to switch to the less branch circuit of charging of impedance to charge, such mode can reduce because calorific capacity that the consumption of impedance increases, can also guarantee the speed of charging simultaneously, both can effectively reduce calorific capacity, can improve the efficiency of charging again, simultaneously can also combine the use with current high pass scheme, provide user experience and feel, and realize compatible design with current general charging scheme and design the compatible design

Second embodiment:

the following description is provided with reference to a specific charging circuit structure, and the present embodiment provides an operating principle of the charging circuit.

As shown in fig. 5, the charging circuit according to the present embodiment mainly includes a charger 41, a power management chip PMI 42, a mobile phone battery 43, PMOS transistors P1-P4, a transistor Q1 45, a charging management chip WP 46, and a necessary resistor and capacitor 47. The charger 41 is an external device connected to the power supply interface.

In this embodiment, the impedance of the branch where the charging chip manager WP 46 is located is much smaller than the impedance of the branch where the power management chip PMI 42 is located, and the impedance in the line is reduced according to the requirement of the charging circuit to obtain better conversion efficiency, that is, to reduce the loss of the path, the principle is as follows:

when the electric quantity of the battery is too low, the battery with too low electric quantity is not suitable for charging by using large current, and the large current can generate loss on the battery, so that when the electric quantity is too low, the scheme is not adopted for charging, and high-pass trickle charging, namely low-speed charging, is still used, so that the battery is protected to the maximum extent;

when the battery electric quantity is moderate, the battery is automatically switched to a WP line of a charging chip management to carry out low-voltage large-current charging, the control brief description of the module is that the WP line of the charging chip management can collect the voltage and the charging current of the battery in real time, when the voltage (such as 3.8V) and the charging current (such as 1.5A) of the battery meet the WP condition of the charging chip, a control logic is turned to the interactive identification of the WP and a charger instead of the conventional interactive identification of the charger and high-current, of course, the operations are supported by software, when the battery and external conditions meet the threshold condition of the WP of the charging chip management, the grid of a triode Q1 outputs high potential, so that a three-level tube Q1 is conducted, bases of two parallel and two strings of PMOS tubes P1-P4 are kept low potential, sources of the PMOS tubes P1-P4 obtain a high potential through a resistor R3, so that the PMOS tubes P1-P4 are conducted, at the battery is directly charged through the PMOS, no matter the design of the high-pass power management chip, the charging chip finally needs to carry out high-pass through the charging tube Q4, the charging chip in the charging chip, the impedance of the whole MOS chip management circuit is reduced, and the whole charging efficiency is reduced because the whole PMI circuit is reduced.

Description of the invention: the voltage division circuit composed of the R1 and the R2 is designed to detect the VBUS voltage for the charging chip management WP;

2. the voltage division circuit composed of the resistors R4 and R5 is designed to provide a proper grid voltage for the triode, so that the triode Q1 cannot work in a cut-off region;

3. in the implementation of the scheme, a chip WP1 corresponding to a charging management chip WP needs to be arranged in the charger, data interaction is carried out at present, and a charging circuit is ensured to be switched to the side of the charging management chip WP but not to be switched to the high-pass side;

4. no matter the detection of the high-pass identification scheme or the charging management chip side of the scheme is identified by using the line signals of D & lt + & gt and D & lt- & gt, the signals transmitted by the D & lt + & gt and the D & lt- & gt of the two identification schemes are different, and only one charging can be identified at any time on software for avoiding conflict;

5. the purpose of adopting two parallel PMOS tubes P1-P4 connected in series is to form the shunting of large current and prevent a single MOS tube from being burnt out.

Through the realization of the charging circuit, the heating value is effectively reduced, the charging circuit can be combined with a high-pass scheme for use, the user experience is provided, and the compatible design with the current universal charging scheme is realized.

The third embodiment:

referring to fig. 6, a schematic structural diagram of the mobile terminal provided in this embodiment is shown, where the mobile terminal includes the charging circuit provided in the first to second embodiments, and the charging circuit may further include a charging branch with a smaller impedance on the basis of an existing fast charging circuit structure. Based on the mobile terminal in the figure, when the battery on the mobile terminal is charged through the charging circuit, the charging control method is as shown in fig. 7, and the steps are as follows:

s601, detecting the electric quantity percentage of the battery to be charged in a charging state;

s602, if the electric quantity percentage is judged to be smaller than a first preset value, the battery to be charged is in a low electric quantity state, and a first charging branch in the charging circuit is switched on for charging;

s603, if the electric quantity percentage is judged to be larger than or equal to a first preset value, the battery to be charged is in a medium electric quantity state, and a second charging branch in the charging circuit is switched on for charging.

In this embodiment, when the charging circuit is charging using the first charging branch, the detecting a percentage of the electric quantity of the battery to be charged further includes:

detecting a charging current of the first charging branch circuit;

In this embodiment, the control method may also be implemented by the processor and the memory in fig. 1, that is, by storing codes for implementing functions of the steps of the method in the memory, and by executing the codes, the control of the charging circuit is implemented.

In summary, embodiments of the present invention provide a charging circuit, a charging control method, and a mobile terminal, and in order to overcome the defect that the existing high-speed charging circuit scheme may cause an obvious heating phenomenon and may affect user experience, two charging branches are arranged on the charging circuit, and a difference between total impedances of the two charging branches is large, when an electric quantity of a battery to be charged is low, the charging branch with a large impedance is used for charging, and if the electric quantity of the battery to be charged is equal to or greater than that of the battery to be charged, the charging branch with a small impedance is selected to be switched to charge, so that a heating value increased due to consumption of impedance can be reduced, a charging speed can be ensured, and a heating value can be effectively reduced, and charging efficiency can be improved.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A charging circuit, comprising: the charging circuit comprises a power supply interface, a first charging branch circuit, a second charging branch circuit and a logic circuit, wherein the first charging branch circuit and the second charging branch circuit are respectively connected with the power supply interface, and the logic circuit is used for controlling the first charging branch circuit or the second charging branch circuit to charge a battery to be charged;

the charging circuit, its characterized in that, the power supply interface is the type-c interface that charges, charging circuit real-time detection waits that rechargeable battery's electric quantity percentage includes: determining the electric quantity percentage of the battery to be charged by detecting data of a data port pin in the type-c charging interface;

if the electric quantity percentage is above the medium electric quantity state, the logic circuit switches on the second charging branch circuit or switches the charging circuit from the first charging branch circuit to the second charging branch circuit to charge the battery to be charged;

the second charging branch comprises a charging management chip WP, a PMOS (P-channel metal oxide semiconductor) tube and a triode Q1 which are sequentially connected in series, and an auxiliary electronic device connected among the charging management chip WP, the PMOS tube and the triode Q1 in series/parallel;

the PMOS tube is a PMOS tube combination formed by connecting N PMOS tubes in a series-parallel connection mode, and N is more than or equal to 1.

2. The charging circuit according to claim 1, wherein during the charging process, the charging management chip WP collects the power percentage of the battery to be charged and/or the charging current of the first charging branch in real time, and if the power percentage and/or the charging current meet the switching condition of the charging management chip WP, the logic circuit is controlled to switch to the second charging branch to operate.

3. The charging circuit of claim 2, wherein said controlling said logic circuit to switch to said second charging branch operation comprises:

and switching on the triode Q1, controlling the grid electrode of the triode Q1 to output high potential to realize conduction, keeping the low potential state of the base electrode of the PMOS tube, and obtaining high potential to realize conduction by the source electrode of the PMOS tube through the auxiliary electronic device.

4. The charging circuit of any of claims 1-3, wherein the first charging branch comprises: a power management chip PMI and an MOS tube Q4;

the power management chip PMI is used for detecting the electric quantity percentage of the battery to be charged and switching on the first charging branch circuit to charge through the MOS tube Q4 according to a detection result;

5. A mobile terminal, characterized in that it comprises a charging circuit according to any one of claims 1-4 and a battery, said battery is connected to said first charging branch, and said second charging branch is connected to said battery through MOS transistor Q4 in said first charging branch.

6. A charging control method applied to the charging circuit according to any one of claims 1 to 4, the method comprising:

7. The charge control method of claim 6, wherein said detecting a percentage of charge of the battery to be charged while the charging circuit is charging using the first charging branch, further comprises:

detecting a charging current of the first charging branch circuit;