CN220754383U

CN220754383U - Electronic equipment

Info

Publication number: CN220754383U
Application number: CN202322257785.8U
Authority: CN
Inventors: 鄢晓
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2024-04-09
Anticipated expiration: 2033-08-21

Abstract

The disclosure provides an electronic device, comprising a battery, a main board, a power management chip and a charging control circuit; the first end of the charging control circuit is electrically connected with the main board, the second end of the charging control circuit is electrically connected with the power management chip, and the third end of the charging control circuit is electrically connected with the battery. The charging voltage of the battery is adjusted and solved through the hardware circuit, the problem of overcharging caused by the fault of the fuel gauge or the electronic equipment can be solved, and the safety of the battery is improved.

Description

Electronic equipment

Technical Field

The disclosure relates to the field of charging technologies, and in particular, to an electronic device.

Background

The size of electronic devices is increasing, and the amount of power in their batteries is also increasing. In the related art, an electricity meter is arranged in the electronic equipment, the electricity quantity of the battery is detected through the electricity meter, and then the electricity quantity is displayed on a screen, so that a user can know the electricity quantity of the battery conveniently.

In the scenario of charging electronic equipment, the electricity meter or the electronic equipment may malfunction, which results in failure to accurately feed back the battery power; in this scenario, if the battery is continuously charged, an overcharge phenomenon may occur, resulting in a potential safety hazard.

Disclosure of Invention

The present disclosure provides an electronic device to solve the above technical problems.

According to a first aspect of the present disclosure, there is provided an electronic device including a battery, a main board, a power management chip, and a charge control circuit; the first end of the charging control circuit is electrically connected with the main board, the second end of the charging control circuit is electrically connected with the power management chip, and the third end of the charging control circuit is electrically connected with the battery.

Optionally, the charging control circuit comprises an error detection module, an error amplification module and a resistance adjustment module;

the error detection module is electrically connected with the main board through a first end of the charging control circuit and is electrically connected with the power management chip through a second end of the charging control circuit, and is used for acquiring the current voltage of the battery from the main board and acquiring a constant voltage charging mode signal from the power management chip, and acquiring error signals of the current voltage and a preset reference voltage when receiving the constant voltage charging mode signal output by the power management chip;

the error amplifying module is electrically connected with the error detecting module and the power management chip through the second end of the charging control circuit, and is used for acquiring the error signal from the error detecting module and the constant voltage charging mode signal from the power management chip, and amplifying the error signal when receiving the constant voltage charging mode signal output by the power management chip to obtain an error amplifying signal;

the resistance adjustment module is electrically connected with the error amplification module and the battery through a third end of the charging control circuit, and is used for adjusting the resistance value between the main board and the battery after receiving the error amplification signal.

Optionally, the error detection module includes a first resistor, a second resistor, a third resistor, a fourth resistor, and a first operational amplifier;

the first end of the first resistor is grounded, and the second end of the first resistor is electrically connected with the first end of the second resistor and the non-inverting input end of the first operational amplifier respectively; the second end of the second resistor is electrically connected with a preset constant voltage source;

the first end of the third resistor is grounded, and the second end of the third resistor is electrically connected with the first end of the fourth resistor and the inverting input end of the first operational amplifier respectively; the second end of the fourth resistor is electrically connected with a battery voltage detection point of the main board through the first end of the charging control circuit;

the output end of the first operational amplifier is electrically connected with the error amplifying module; the control end of the first operational amplifier is electrically connected with the first control pin of the power management chip through the second end of the charging control circuit.

Optionally, the error amplifying module includes a fifth resistor, a sixth resistor, a seventh resistor and a second operational amplifier;

the first end of the fifth resistor is grounded, and the second end of the fifth resistor is electrically connected with the non-inverting input end of the second operational amplifier;

the first end of the sixth resistor is electrically connected with the error detection module, and the second end of the sixth resistor is electrically connected with the first end of the seventh resistor and the inverting input end of the second operational amplifier respectively;

the output end of the second operational amplifier is electrically connected with the second end of the seventh resistor, and the control end of the second operational amplifier is electrically connected with the first control pin of the power management chip through the first end of the charging control circuit.

Optionally, the resistance adjustment module includes a switching device;

the first end of the switching device is electrically connected with a battery voltage detection point of the main board through the first end of the charging control circuit; the second end of the switching device is electrically connected with the battery through the third end of the charging control circuit; and the control end of the switching device is electrically connected with the error amplifying module.

Alternatively, the switching device operates in a variable resistance region when receiving the error amplification signal and operates in a constant current region when receiving the non-constant voltage charging mode signal.

Optionally, the charging control circuit further includes a switch control module, and the switch control module is electrically connected with the resistance adjustment module and the power management chip respectively;

the switch control module is used for forwarding the non-constant voltage charging mode signal output by the power management chip to the resistance adjustment module when the non-constant voltage charging mode signal is received.

Optionally, the switch control module includes a diode, a first end of the diode is electrically connected with the resistance adjustment module, and a second end of the diode is electrically connected with a second control pin of the power management chip.

Optionally, the electronic device further includes a processor, and the charging control circuit further includes an overvoltage detection module, where the overvoltage detection module is electrically connected to the main board and the processor, and is configured to obtain a current voltage and a preset reference voltage of the battery from the main board, generate an overvoltage detection signal according to the current voltage and the preset reference voltage, and send the overvoltage detection signal to the processor.

Optionally, the overvoltage detection module includes a third operational amplifier and an eighth resistor;

the inverting input end of the third operational amplifier is electrically connected with the second end of the third resistor in the error detection module;

the non-inverting input end of the third operational amplifier is electrically connected with the second end of the first resistor in the error detection module;

the output end of the third operational amplifier is electrically connected with the first end of the eighth resistor;

and a second end of the eighth resistor is electrically connected with an overvoltage detection pin of the processor.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

in the solution provided in this embodiment, a charging control circuit may be provided, where a first end of the charging control circuit is electrically connected to the motherboard, a second end of the charging control circuit is electrically connected to the power management chip, and a third end of the charging control circuit is electrically connected to the battery. Therefore, the charging voltage of the battery is adjusted through the hardware circuit, the problem of overcharge caused by the fault of the fuel gauge or the electronic equipment can be solved, and the safety of the battery is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Fig. 1 is a block diagram of an electronic device according to an embodiment of the present disclosure.

Fig. 2 is a block diagram of a charge control circuit 11 according to an embodiment of the present disclosure.

Fig. 3 is a circuit diagram of another charge control circuit 11 according to an embodiment of the present disclosure.

Fig. 4 is a circuit diagram of an overvoltage detection module 25 according to an embodiment of the present disclosure.

Fig. 5 is a flowchart of adjusting a charging strategy according to an embodiment of the present disclosure.

Fig. 6 is a block diagram of an electronic device according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus consistent with some aspects of the disclosure as detailed in the accompanying claims.

The present disclosure provides an electronic device that may include, but is not limited to, a smart phone, a tablet computer, an electronic book, a smart watch, an electronic whiteboard, and the like. In an embodiment of the present disclosure, the electronic device may include a motherboard, a Battery (BAT), a power management chip (PMIC), and a processor (CPU). Wherein the power management chip, the processor and the battery may be disposed on the motherboard. And the main board is also provided with a battery protection circuit, such as an overcurrent protection circuit, an overvoltage protection circuit and the like, which can be set according to specific scenes.

In the embodiment of the present disclosure, the electronic device further includes a charging control circuit, and referring to fig. 1, the charging control circuit 11 is electrically connected to the battery 12, the motherboard 13, and the power management chip 14, respectively. Wherein,

the power management chip 14 is configured to provide a charging mode signal, which may include a constant voltage charging mode signal and a non-constant voltage charging mode signal. The constant voltage charging mode signal and the non-constant voltage charging mode signal are mutually exclusive, and the constant voltage charging mode signal and the non-constant voltage charging mode signal do not occur simultaneously. The non-constant voltage charging mode signal may include a charging mode signal other than the constant voltage charging mode signal, for example, a constant current charging mode signal (CC), a trickle charging mode signal, etc., and may be set according to a specific scenario, and the corresponding scheme falls within the protection scope of the present disclosure.

The main board 13 is provided with a power voltage detection point, and the voltage at the power voltage detection point is detected as the current voltage of the battery 12, that is, the main board 13 is used for providing the current voltage of the battery 12.

The first end of the charge control circuit 11 is electrically connected to the motherboard 13, and can receive the current voltage vbat_con of the battery 12 output by the motherboard 13; the second end of the charging control circuit 11 is electrically connected with the power management chip 14, and can receive a constant voltage charging mode signal CV_EN output by the power management chip 14; a third terminal of the charge control circuit 11 is electrically connected to the battery 12, and can output a charge voltage VCELL; the charge control circuit 11 is configured to adjust the resistance value between the main board 13 and the battery 12 according to the charge mode signal and the current voltage, or to adjust the resistance value of the battery, that is: in the case where the charging voltage is kept unchanged, when the resistance value of the battery 12 becomes large, the charging current of the battery can be reduced, so that the excessive voltage of the battery 12 caused by the excessive charging current is avoided; when the resistance value of the battery 12 becomes small, the charging current of the battery 12 can be increased, the charging speed of the battery 12 can be increased, and the occurrence of an excessive voltage of the battery 12 can be avoided.

Therefore, the resistance value of the charging loop is adjusted through the hardware circuit to adjust the voltage of the power supply voltage detection point, namely the current voltage of the battery, so that the problem of overcharging of the battery caused by the fault of the fuel gauge or the electronic equipment can be solved, the phenomenon of overcharging of the battery is prevented, and the safety of the battery is improved. In addition, the hardware circuit can be arranged outside the power management chip, the existing power management chip in the electronic equipment is not required to be improved, the problem of battery overcharge during constant voltage Charging (CV) can be avoided, and the problem of overcharge caused by failure of the fuel gauge can also be avoided.

In one embodiment, referring to fig. 2, the charging control circuit 11 includes an error detection module 21, an error amplification module 22, and a resistance adjustment module 23. Wherein,

the error detection module 21 is electrically connected to the main board 13 through a first end of the charge control circuit 11 and to the power management chip 14 through a second end of the charge control circuit 11, and is configured to obtain a current voltage vbat_con of the battery 12 from the main board 13 and a constant voltage charge mode signal cv_en from the power management chip 14, and to obtain an error signal of a current voltage preset reference voltage v_ref when receiving the constant voltage charge mode signal cv_en output from the power management chip 14.

The error amplifying module 22 is electrically connected to the error detecting module 21 and the power management chip 14 through the second end of the charging control circuit 11, and is configured to obtain an error signal from the error detecting module 21 and obtain a constant voltage charging mode signal cv_en from the power management chip 14, and amplify the error signal when receiving the constant voltage charging mode signal cv_en output by the power management chip 14, to obtain an error amplified signal.

The resistance adjustment module 23 is electrically connected to the error amplification module 22 and to the battery 12 through a third terminal of the charge control circuit, and is configured to adjust a resistance value between the motherboard 13 and the battery 12 after receiving the error amplification signal.

With continued reference to fig. 2, the above-mentioned operation of the charge control circuit 11 includes:

when receiving the constant voltage charging mode signal cv_en, the error detection module 21 and the error amplification module 22 are in an enabled state, i.e., both can operate normally. At this time, the error detection module 21 may receive the current voltage vbat_con of the battery 12 and the preset reference voltage v_ref, and calculate an error signal corresponding to the current voltage vbat_con and the preset reference voltage v_ref, where the error signal is positively correlated with the difference value of the current voltage vbat_con and the preset reference voltage v_ref. It should be noted that the preset reference voltage v_ref may be obtained from a constant voltage source in the electronic device, and may be set according to a specific scenario, which is not limited herein.

The error amplification module 22 amplifies the error signal to obtain an error amplified signal. The magnification range is [1, 100], and in one example, the magnification range is 10. The skilled person can select a suitable amplification factor according to the specific embodiment, so that the error amplification signal can meet the requirement of the switching device in the resistance adjustment module 23, and the corresponding scheme falls within the protection scope of the present disclosure.

The resistance adjustment module 23 can adjust its own resistance value after receiving the error amplification signal, so as to adjust the resistance value between the main board 13 and the battery 12. Since the resistance adjustment module 23 is connected in series between the main board and the battery 12, and only the resistance value of the resistance adjustment module 23 and the resistance value inside the battery change in the charging circuit between the main board 13 and the battery 12, the change in the resistance value of the resistance adjustment module 23 can be regarded as a change in the resistance value inside the battery. Thus, the current voltage of the battery is adjusted by adjusting the internal resistance value of the battery 12.

In an embodiment, referring to fig. 3, the error detection module 21 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first operational amplifier A1. Wherein,

the first end of the first resistor R1 is grounded, and the second end of the first resistor R1 is electrically connected with the first end of the second resistor R2 and the non-inverting input end (indicated by "+") of the first operational amplifier A1 respectively; the second end of the second resistor R2 is electrically connected with a preset constant voltage source (the voltage of the second resistor is VREF);

the first end of the third resistor R3 is grounded, and the second end of the third resistor R3 is electrically connected with the first end of the fourth resistor R4 and the inverting input end (denoted by "-") of the first operational amplifier A1 respectively; the second end of the fourth resistor R4 is electrically connected with a battery voltage detection point of the main board 13 through the first end of the charging control circuit 11;

the output end of the first operational amplifier A1 is electrically connected with the error amplifying module 22; the control terminal of the first operational amplifier A1 is electrically connected to the first control pin of the power management chip 14.

In this embodiment, the first resistor R1 and the second resistor R2 form a first voltage dividing circuit, and the voltage dividing ratio of the voltage dividing circuit can be set according to a specific scene. In one example, the resistance value of the first resistor R1 is 10k ohms, the resistance value of the second resistor is 10k ohms, and the voltage division ratio of the first voltage division circuit is 1:1, i.e. the voltage at the second end of the first resistor R1 is half of the preset reference voltage. In one example, the preset reference voltage has a value ranging from 1V to 10V. Taking the preset reference voltage as 1V as an example, the voltage at the second end of the first resistor R1 is 0.5V.

In this embodiment, the third resistor R3 and the fourth resistor R4 form a second voltage dividing circuit, and the voltage dividing ratio of the voltage dividing circuit can be set according to a specific scene. In one example, the third resistor R3 has a resistance of 80k ohms, the fourth resistor R4 has a resistance of 10k ohms, and the second voltage divider circuit has a voltage division ratio of 8:1, i.e. the voltage at the second end of the third resistor R3 is one ninth of the preset reference voltage. In one example, the voltage range of the battery is 3-5.5V, i.e., the current voltage range is 3-5.5V. Taking the current voltage vbat_con as an example, the voltage at the second end of the third resistor R3 is 0.5V.

In this embodiment, the first operational amplifier A1 may calculate the difference between the two signals at the non-inverting input terminal and the inverting input terminal, thereby obtaining an error signal. In one example, the error signal is positive when the current voltage of the battery is greater than a preset reference voltage; when the current voltage of the battery is smaller than the preset reference voltage, the error signal is negative.

In one embodiment, with continued reference to fig. 3, the error amplification module 22 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a second operational amplifier A2. Wherein,

the first end of the fifth resistor R5 is grounded GND, and the second end of the fifth resistor R5 is electrically connected with the non-inverting input end of the second operational amplifier A2;

the first end of the sixth resistor R6 is electrically connected with the error detection module 21, and the second end of the sixth resistor R6 is electrically connected with the first end of the seventh resistor R7 and the inverting input end of the second operational amplifier A2 respectively;

the output end of the second operational amplifier A2 is electrically connected to the second end of the seventh resistor R7, and the control end of the second operational amplifier A2 is electrically connected to the first control pin of the power management chip 14 through the first end of the charge control circuit 11.

In this embodiment, the fifth resistor R5 is used to provide a reference voltage for the second operational amplifier A2. In one example, the reference voltage is 0V. The sixth resistor R6, the seventh resistor R7 and the second operational amplifier A2 constitute a proportional amplifying circuit. The amplification factor is equal to the ratio of the resistance values of the second resistor R7 and the sixth resistor R6. In an example, the resistance of the fifth resistor R5 may be 10k ohms, the resistance of the sixth resistor R6 may be 10k ohms, and the resistance of the seventh resistor R7 may be 100k ohms, so that the amplification factor of the proportional amplifying circuit is 100/10=10 times. For example, when the error signal is 0.1V, the error amplified signal output by the proportional amplifying circuit is 0.1×10=1v.

In one embodiment, with continued reference to fig. 3, the resistance adjustment module 23 includes a switching device Q1. The first end of the switching device Q1 is electrically connected with a battery voltage detection point of the main board 13 through the first end of the charging control circuit 11; a second end of the switching device Q1 is electrically connected with the battery 12 through a third end of the charging control circuit 11; the control terminal of the switching device Q1 is electrically connected to the error amplifying module 22. The switching device Q1 can be implemented by a PMOS tube or an NMOS tube. In an example, the switching device Q1 may be implemented with an NMOS transistor. In this way, when the error amplification signal output by the error amplification module 22 is positive, the switching device Q1 can be controlled to operate in the variable resistance region, and the resistance value is adjusted to be matched according to the error amplification signal. In another example, the switching device Q1 may be implemented as a PMOS transistor, where the positive phase input terminal and the negative phase input terminal of the first operational amplifier A1 may be inverted, that is, the current voltage of the battery 12 is input to the positive phase input terminal of the first operational amplifier A1, and the preset reference voltage VREF is input to the negative phase input terminal of the first operational amplifier A1, so that the first operational amplifier A1 may output an error signal with a positive value when the input signal of the positive phase input terminal is greater than the input signal of the negative phase input terminal, and output an error signal with a negative value when the input signal of the positive phase input terminal is less than the input signal of the negative phase input terminal, and output an error signal with a value of 0 when the input signal of the positive phase input terminal is equal to the input signal of the negative phase input terminal.

In an embodiment, the charging circuit further comprises a switch control circuit. With continued reference to fig. 3, the switch control module 24 is electrically connected to the resistance adjustment module 23 and the power management chip 14, respectively. The switch control module 24 is configured to forward the non-constant voltage charging mode signal pass_thrg output by the power management chip 14 to the resistance adjustment module 23 when receiving the signal. In this way, the switching device Q1 in the resistance adjustment module 23 operates in the saturation region, that is, the on-resistance of the switching device Q1 is minimum, and the switching device Q1 corresponds to one wire, so that the battery charging is not affected.

With continued reference to fig. 3, the switch control module 24 includes a diode D1, a first terminal of the diode D1 is electrically connected to the resistance adjustment module 23, and a second terminal of the diode D1 is electrically connected to a second control pin (for outputting the non-constant voltage charging mode signal pass_thrg) of the power management chip 24. It should be noted that, when the switching device Q1 is an NMOS transistor, the first end of the diode D1 is a cathode and the second end is an anode; when the switching device Q1 is a PMOS transistor, the first end of the diode D1 is an anode and the second end is a cathode. Based on the above analysis, a scheme in which the switching device Q1 is an NMOS transistor and the first terminal of the diode D1 is a cathode and the second terminal is an anode is illustrated in fig. 3.

In an embodiment, the charging control circuit further comprises an overvoltage detection module. Referring to fig. 4, the overvoltage detection module 25 is electrically connected to the main board 13 and the processor CPU, respectively, and is configured to obtain the current voltage vbat_con of the battery 12 and the preset reference voltage VREF from the main board 13, and generate an overvoltage detection signal according to the current voltage vbat_con and the preset reference voltage VREF, and send the overvoltage detection signal to the processor CPU.

With continued reference to fig. 4, the overvoltage detection module 25 includes a third operational amplifier A3 and an eighth resistor R8. The inverting input end of the third operational amplifier A3 is electrically connected with the second end of the third resistor R3 in the error detection module 21; the non-inverting input end of the third operational amplifier A3 is electrically connected with the second end of the first resistor R1 in the error detection module 21; the output end of the third operational amplifier A3 is electrically connected with the first end of the eighth resistor R8; the second end of the eighth resistor R8 is electrically connected to an overvoltage detection pin of the processor CPU.

In this way, in this embodiment, the over-voltage detection signal is used to prompt the processor CPU that the current voltage vbat_con of the battery 12 is greater than the preset reference voltage, and the charging strategy needs to be adjusted.

In one embodiment, the flow of the processor adjusting the charging strategy according to the overvoltage detection signal is shown in fig. 5. Referring to fig. 5, the processor receives the overvoltage detection signal to determine whether the current voltage vbat_con is greater than a preset reference voltage.

When the current voltage VBAT_CON is larger than the preset reference voltage, the processor can adjust the current charging voltage by one step value, namely, reduce the charging voltage by one gear; and continuously judging whether the current voltage VBAT_CON is larger than a preset reference voltage; and when the current voltage VBAT_CON is continuously judged to be continuously larger than the preset reference voltage, the charging voltage is further regulated down by one gear. The method comprises the steps of circulating in this way, entering a charging voltage holding state for a preset duration (such as N seconds, N being a positive integer) until the current voltage VBAT_CON is smaller than a preset reference voltage, and continuously detecting whether a scene that the current voltage VBAT_CON is larger than the preset reference voltage occurs in the holding state;

when the current voltage VBAT_CON is smaller than the preset reference voltage, the processor can adjust the current charging voltage by one step value, namely, increase the charging voltage by one gear; and continuing to increase the charging voltage by one gear when the current voltage VBAT_CON is determined to be still smaller than the preset reference voltage. And (3) circulating in this way, until the current voltage VBAT_CON is equal to or greater than a preset reference voltage, entering a charging voltage holding state for a preset duration (such as N seconds, N being a positive integer), and continuously detecting whether a scene that the current voltage VBAT_CON is smaller than the preset reference voltage occurs in the holding state.

Therefore, the processor can avoid the situation of overvoltage of the battery under the condition of ensuring the charging efficiency of the battery by reducing or improving the charging voltage, thereby being beneficial to improving the charging safety.

Fig. 6 is a block diagram of an electronic device, according to an example embodiment. For example, the electronic device 600 may be a smart phone, a computer, a digital broadcast terminal, a tablet device, a medical device, an exercise device, a personal digital assistant, or the like.

Referring to fig. 6, an electronic device 600 may include one or more of the following components: a processing component 602, a memory 604, a power supply component 606, a multimedia component 608, an audio component 610, an input/output (I/O) interface 612, a sensor component 614, a communication component 616, and an image acquisition component 618.

The processing component 602 generally controls overall operation of the electronic device 600, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 602 may include one or more processors 620 to execute computer programs. Further, the processing component 602 can include one or more modules that facilitate interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate interaction between the multimedia component 608 and the processing component 602.

The memory 604 is configured to store various types of data to support operations at the electronic device 600. Examples of such data include computer programs, contact data, phonebook data, messages, pictures, videos, and the like for any application or method operating on electronic device 600. The memory 604 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power supply component 606 provides power to the various components of the electronic device 600. The power supply components 606 can include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 600. The power supply assembly 606 may include a power chip and the controller may communicate with the power chip to control the power chip to turn on or off the switching device to power the motherboard circuit with or without the battery.

The multimedia component 608 includes a screen between the electronic device 600 and the target object that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input information from a target object. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or sliding action, but also the duration and pressure associated with the touch or sliding operation.

The audio component 610 is configured to output and/or input audio file information. For example, the audio component 610 includes a Microphone (MIC) configured to receive external audio file information when the electronic device 600 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio file information may be further stored in the memory 604 or transmitted via the communication component 616. In some embodiments, audio component 610 further includes a speaker for outputting audio file information.

The I/O interface 612 provides an interface between the processing component 602 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc.

The sensor assembly 614 includes one or more sensors for providing status assessment of various aspects of the electronic device 600. For example, the sensor assembly 614 may detect an on/off state of the electronic device 600, a relative positioning of the components, such as a display and keypad of the electronic device 600, the sensor assembly 614 may also detect a change in position of the electronic device 600 or one of the components, the presence or absence of a target object in contact with the electronic device 600, an orientation or acceleration/deceleration of the electronic device 600, and a change in temperature of the electronic device 600. In this example, the sensor assembly 614 may include a magnetic force sensor, a gyroscope, and a magnetic field sensor, wherein the magnetic field sensor includes at least one of: hall sensors, thin film magneto-resistive sensors, and magnetic liquid acceleration sensors.

The communication component 616 is configured to facilitate communication between the electronic device 600 and other devices, either wired or wireless. The electronic device 600 may access a wireless network based on a communication standard, such as WiFi,2G, 3G, 4G, 5G, or a combination thereof. In one exemplary embodiment, the communication component 616 receives broadcast information or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 616 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the electronic device 600 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital information processors (DSPs), digital information processing devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements.

In an exemplary embodiment, a computer readable storage medium, such as memory 604 including instructions, is also provided, the executable computer program being executable by a processor. The readable storage medium may be, among other things, ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An electronic device is characterized by comprising a battery, a main board, a power management chip and a charging control circuit; the first end of the charging control circuit is electrically connected with the main board, the second end of the charging control circuit is electrically connected with the power management chip, and the third end of the charging control circuit is electrically connected with the battery.

2. The electronic device of claim 1, wherein the charge control circuit comprises an error detection module, an error amplification module, and a resistance adjustment module;

3. The electronic device of claim 2, wherein the error detection module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, and a first operational amplifier;

4. The electronic device of claim 2, wherein the error amplification module comprises a fifth resistor, a sixth resistor, a seventh resistor, and a second operational amplifier;

5. The electronic device of claim 2, wherein the resistance adjustment module comprises a switching device;

6. The electronic device according to claim 5, wherein the switching device operates in a variable resistance region when receiving the error amplification signal and operates in a constant current region when receiving the non-constant voltage charging mode signal.

7. The electronic device of claim 2, wherein the charge control circuit further comprises a switch control module electrically connected to the resistance adjustment module and the power management chip, respectively;

8. The electronic device of claim 7, wherein the switch control module comprises a diode, a first end of the diode is electrically connected to the resistance adjustment module, and a second end of the diode is electrically connected to a second control pin of the power management chip.

9. The electronic device of claim 2, further comprising a processor, wherein the charge control circuit further comprises an overvoltage detection module electrically connected to the motherboard and the processor, respectively, for obtaining a current voltage of the battery and a preset reference voltage from the motherboard, and generating an overvoltage detection signal based on the current voltage and the preset reference voltage and transmitting the overvoltage detection signal to the processor.

10. The electronic device of claim 9, wherein the overvoltage detection module comprises a third operational amplifier and an eighth resistor;