Charging circuit, terminal and battery protection method

Abstract

The invention relates to the technical field of communication, in particular to a charging circuit, a terminal and a battery protection method. The charging circuit is arranged at a terminal, the device comprises a battery protection circuit, the first end of the battery protection circuit is connected with a battery pack, the second end of the battery protection circuit is connected with the first end of a charge pump, and the second end of the battery protection circuit is further connected with a first load; wherein the battery protection circuit disconnects the connection between the first end of the battery protection circuit and the second end of the battery protection circuit under the condition that the terminal is connected with a charging circuit and the battery pack is fully charged.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a charging circuit, a terminal, and a battery protection method. Background Technology

[0002] Currently, terminals can use battery packs composed of multiple cells as their power source. Since a battery pack consists of multiple cells connected in series, it can provide a higher voltage. However, the voltage provided by the battery pack does not match the voltage of most loads in the terminal. Therefore, a charge pump is typically used in the battery pack's discharge circuit to step down the voltage before supplying it to most loads.

[0003] The first load can withstand a larger voltage, so it can be connected between the charge pump and the battery pack to improve load performance. However, this method can prevent the battery pack from being fully charged and cut off, resulting in the battery pack not being fully charged and requiring frequent recharging. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a charging circuit, a terminal, and a battery protection method that can solve the above problems.

[0005] According to a first aspect of the present disclosure, a charging circuit is provided, disposed in a terminal, the circuit comprising: a battery protection circuit, a first terminal of the battery protection circuit being connected to a battery pack, a second terminal of the battery protection circuit being connected to a first terminal of a charge pump, and the second terminal of the battery protection circuit also being connected to a first load; wherein, when the terminal is connected to a charging line and the battery pack is fully charged, the battery protection circuit disconnects the connection between the first terminal of the battery protection circuit and the second terminal of the battery protection circuit.

[0006] According to a second aspect of the present disclosure, a terminal is provided, the terminal including a charging circuit as described in the first aspect.

[0007] According to a third aspect of the present disclosure, a battery protection method is provided, applied to a charging circuit as described in the first aspect, the method comprising: disconnecting the connection between a first terminal of the battery protection circuit and a second terminal of the battery protection circuit when the terminal is connected to a charging line and the battery pack is fully charged.

[0008] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0009] The battery protection circuit disclosed herein has a first terminal connected to the battery pack, a second terminal connected to the first terminal of the charge pump, and also connected to a first load. When the battery pack is fully charged while the charging line is connected, the connection between the first and second terminals of the charging protection circuit can be disconnected. On one hand, after disconnection, the fully charged battery pack cannot discharge to the first load, avoiding the problem of insufficient charge and frequent recharging due to discharge. On the other hand, after disconnection, the charging line cannot continue charging the fully charged battery pack, preventing overcharging.

[0010] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this disclosure, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0012] Figure 1 This is a schematic diagram of the architecture of a charging circuit according to an exemplary embodiment of the present disclosure.

[0013] Figure 2 This is a schematic diagram of a charging circuit according to an exemplary embodiment of the present disclosure.

[0014] Figure 3 This is a schematic diagram of the architecture of a charging circuit according to an exemplary embodiment of the present disclosure.

[0015] Figure 4 This is a schematic flowchart illustrating a battery protection method according to an exemplary embodiment of the present disclosure.

[0016] Figure 5 This is a schematic block diagram illustrating a device for battery protection according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0017] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0018] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0019] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0020] In some embodiments, the battery pack charging and discharging architecture within the terminal may include a charging module (charger), a charge pump (chargerpump), and a first load. A first end of the battery pack is connected to a first end of the charge pump, and the first end of the battery pack is also connected to the first load; a second end of the charge pump is connected to a first end of the charging module; and a second end of the charging module is connected to a charging line.

[0021] In this embodiment, the battery pack includes multiple batteries connected in series. Using a battery pack increases the total capacity, giving the device longer battery life. However, in addition to increasing the total capacity, connecting multiple batteries in series also increases the voltage, thus requiring the use of a charge pump. For most loads, they can be connected to the third terminal of the charging module. When no charging line is connected, the battery pack, through the charge pump, steps down the voltage and supplies power to most loads.

[0022] However, the first load can withstand a higher voltage, and its performance improves with increasing voltage. Therefore, in some embodiments, the first load can be connected to the first terminal of the battery pack, so that the voltage received by the first load is the voltage of the battery pack, rather than the voltage stepped down by the charge pump. This approach can improve the performance of the first load.

[0023] However, after adopting the above embodiment, the battery pack is directly connected to the first load, and the discharge of the battery to the first load cannot be controlled by the charging module. This causes the battery pack to be difficult to fully charge or to lose power after being fully charged, even when connected to the charging line, resulting in the need for frequent charging of the battery pack.

[0024] To address the aforementioned technical problems, this disclosure proposes a charging circuit.

[0025] Figure 1 This is a schematic diagram of a charging circuit architecture according to an embodiment of the present disclosure. The circuit is located in a terminal and can be used to control the charging and discharging of the battery pack in the terminal. The terminal includes, but is not limited to, communication devices such as mobile phones, tablets, wearable devices, sensors, and Internet of Things devices.

[0026] like Figure 1 As shown, the charging circuit includes:

[0027] A battery protection circuit 110 is provided, with its first terminal connected to the battery pack 120, its second terminal connected to the first terminal of the charge pump 130, and its second terminal also connected to a first load 140.

[0028] When the terminal is connected to the charging line and the battery pack 120 is fully charged, the battery protection circuit 110 disconnects the connection between the first terminal and the second terminal of the battery protection circuit 110.

[0029] In some embodiments, the battery pack 120 includes a plurality of batteries.

[0030] For example, a battery pack can be formed by two batteries connected in series. On the one hand, this can increase the total power of the terminal and enhance its battery life. On the other hand, compared to a single battery, it can increase the voltage supplied to the terminal in order to meet the power supply needs of loads that require high voltage.

[0031] In some embodiments, the second end of the charge pump 130 may be connected to a charging line.

[0032] When the terminal is connected to a charging line, the charging line can charge the battery pack 120 through the charge pump 130.

[0033] In some embodiments, the charging line may include a wired charging line or a wireless charging line.

[0034] The charging line can supply power to the terminal. The power supplied by the charging line can be used to charge the battery on the one hand, and to supply power to the load in the terminal on the other hand.

[0035] This disclosure does not limit the form of the charging line. For example, the charging line can be a wired charging line or a wireless charging line. Terminal connection to the charging line includes both wired and wireless connections.

[0036] In some embodiments, when the terminal is connected to the charging line and the battery pack 120 is fully charged, the battery protection circuit 110 disconnects the connection between the first terminal and the second terminal of the battery protection circuit 110.

[0037] When the first terminal of the battery protection circuit 110 is disconnected from the second terminal, the battery pack 120 cannot supply power to the first load 140, and the charging line cannot charge the battery pack 120 through the charge pump 130. The battery pack can maintain a fully charged state to prevent overcharging.

[0038] In this embodiment, the power supply for the first load 140 can be provided by a charging line connected to the terminal. The charging line supplies power to the first load 140 via a charge pump 130. The power supply line from the charging line to the first load 140 needs to pass through the charge pump 130, which in this case can be used to increase the voltage, allowing the first load 140 to receive a higher voltage and operate with higher performance.

[0039] In the embodiments of this disclosure, a battery protection circuit 110 is provided. The first terminal of the battery protection circuit 110 is connected to the battery pack 120, and the second terminal of the battery protection circuit 110 is connected to the first terminal of the charge pump 130. The second terminal of the battery protection circuit 110 is also connected to the first load 140, thereby enabling charge and discharge control of the battery pack 120 through the battery protection circuit 110. When the terminal is connected to the charging line and the battery pack 120 is fully charged, the connection between the first and second terminals of the battery protection circuit 110 is disconnected. This prevents overcharging of the battery, effectively cutting off the charging process. Furthermore, when the charging line is connected, it prevents the battery pack 120 from discharging to the first load 140 and the charge pump 130, thus preventing a decrease in the battery pack's capacity and avoiding frequent recharging of the battery pack.

[0040] Figure 2 This is a schematic diagram of a charging circuit according to an embodiment of the present disclosure.

[0041] like Figure 2 As shown, in some embodiments, the battery protection circuit 110 includes a first switching unit 210 and a first diode 220. A first end of the first switching unit 210 is connected to the battery pack 120, and a second end of the first switching unit 210 is connected to a first end of the charge pump 130. The anode of the first diode 220 is connected to the battery pack 120, and the cathode is connected to the first end of the charge pump 130. Disconnecting the connection between the first end and the second end of the battery protection circuit includes disconnecting the first switching unit 210.

[0042] In some embodiments, the first switching unit 210 may be a MOS transistor (Metal Oxide Semiconductor Field Effect Transistor, abbreviated as MOS transistor).

[0043] The first terminal and the second terminal of the first switching unit 210 can correspond to the source and drain of the MOS transistor, respectively.

[0044] In this embodiment, when the battery pack 120 is not fully charged, the first switch unit 210 is turned on, and the charging line connected to the terminal can boost the voltage through the charge pump 130, and then charge the battery pack 120 through the turned-on first switch unit 210.

[0045] When the battery pack 120 is fully charged, if the charging line remains connected to the terminal, the loads within the terminal can be powered through the charging line. In this case, the first switching unit 210 is disconnected, and the anode of the first diode 220 is connected to the battery pack 120, while the cathode is connected to the first terminal of the charge pump 130. This causes the first diode 220 to be in a cut-off state, preventing current from flowing from the charge pump 130 into the battery pack 120. The charging line of the battery pack 120 is disconnected, preventing the battery pack 120 from being overcharged.

[0046] Since the line between the charging line and the first load 140 is conductive, the power supply of the first load 140 is provided by the charging line. Disconnecting the first switch unit 210 does not affect the power supply of the first load 140, and the first load 140 can work normally.

[0047] After the first switching unit 210 is turned off, the current flowing into the battery pack 120 from the direction of the charge pump 130 is cut off by the first diode 220. However, the first diode 220 does not cut off the current flowing from the battery pack 120 to the charge pump 130 and the first load 140. Therefore, if the terminal is disconnected from the charging line, the battery pack 120 can supply power to the charge pump 130 and the first load 140 through the first diode 220, without causing the terminal to lose power.

[0048] However, due to the voltage drop of the first diode 220, the first diode can only conduct from the anode to the cathode when the voltage difference between the battery pack 120 and the cathode direction is greater than this voltage drop, allowing the battery pack 120 to supply voltage to the charge pump 130 and the first load 140. When the charging line is connected, the cathode voltage of the first diode 220 is larger, and the voltage of the battery pack 120 is relatively smaller; therefore, the first diode 220 is reverse-biased and will not charge the battery pack 120. Furthermore, when the voltage of the charging line fluctuates and is lower than the voltage of the battery pack 120, if the voltage difference between the battery pack 120 and the charging line is not greater than the voltage drop of the first diode 220, the first diode 220 will not conduct from the anode to the cathode, thereby reducing the probability that the battery pack 120 will discharge to the first load 140 and the charge pump 130 when the charging line is connected.

[0049] Therefore, when the charging line is connected, after disconnecting the first switch unit 210, the first diode 220 can prevent the battery pack 120 from discharging to the first load 140 and the charge pump 130, thereby avoiding a decrease in the battery pack 120's charge when the terminal is connected to the charging line and avoiding frequent recharging of the battery pack 120.

[0050] In some embodiments, the circuit further includes a first power detection unit for detecting whether the battery pack is fully charged.

[0051] During the charging process, the first power detection unit can detect parameters including but not limited to: charging current, charging voltage, battery pack voltage, and battery pack capacity to determine whether the battery pack is fully charged.

[0052] For example, the first power detection unit can be a fuel gauge (FG), which can further reduce costs by reusing the fuel gauge built into the battery.

[0053] In some embodiments, the battery protection circuit 110 closes the first switch unit 210 under a first condition, the first condition including at least one of the following: the current through the first diode 220 is greater than a current threshold; the duration of the first diode 220 being energized is greater than a duration threshold; the charging line is disconnected from the terminal.

[0054] Although the battery protection circuit 110 can also discharge through the first diode 220, the first diode 220 has a voltage drop. Discharging through the first diode 220 will lead to unnecessary power consumption and a decrease in discharge voltage. Therefore, the first diode 220 can provide short-term discharge, while normal discharge still needs to be achieved through the first switching unit 210.

[0055] If the current passing through the first diode 220 is greater than the current threshold, the first switch unit 210 can be closed. For example, the current passing through the first diode 220 can be detected by the first power detection unit or the second power detection unit. When the current passing through the first diode 220 is greater than the current threshold, it indicates that this is not a temporary discharge caused by fluctuations in the charging circuit. A large current is passing through the first diode 220, which can be considered as the battery pack 120 needing to supply power to the first load 140 and the charge pump 130. At this time, the first switch unit 210 can be closed to conduct the first and second terminals of the battery protection circuit 110, allowing the battery pack 120 to discharge without obstruction.

[0056] If the duration of the first diode 220 being energized exceeds a duration threshold, or the number of times the first diode 220 is energized exceeds a number threshold, the first switch unit 210 can be closed. In some scenarios, the charging circuit may experience voltage fluctuations, requiring the battery pack 120 to discharge intermittently. If it is determined that the duration of the first diode 220 being energized exceeds a duration threshold, or the number of times the first diode 220 is energized exceeds a number threshold, it indicates that the charging circuit may be unable to independently support power supply to the terminal, requiring power from the battery pack 120. Therefore, the first switch unit 210 is closed, allowing the battery pack 120 to discharge through the conducting first switch unit 210.

[0057] When the charging line is disconnected from the terminal, the first switch unit 210 is closed. When a disconnection is detected, indicating that the charging line has lost its ability to supply power to the terminal, the first switch unit 210 is closed, and the battery supplies power to the terminal through the first switch 210. It should be noted that, based on the first diode 220, the battery pack 120 can supply power to the terminal through the first diode 220 even when the charging line is disconnected. Therefore, in reality, between the point when the charging line is disconnected from the terminal and the point when it is determined that the charging line is disconnected and the first switch unit 210 is closed, the terminal will not experience a power outage. Between these two points in time, the battery pack 120 can supply power through the first diode 220.

[0058] In some embodiments, the second end of the charge pump 130 is connected to a second load, the second load requiring a lower operating voltage than the first load 140.

[0059] The second terminal of charge pump 130 is connected to a second load, and the second load requires a lower operating voltage than the first load 140. With this connection configuration, when the battery protection circuit 110 is on, the first load 140, which requires a higher voltage, is directly connected to the battery pack 120 and operates using the higher voltage provided by the battery pack 120; while the second load, which requires a lower voltage, is connected to the second terminal of charge pump 130, and the first terminal of charge pump 130 is connected to the battery pack 120. This allows the higher voltage provided by the battery pack 120 to be stepped down by charge pump 130, and then the lower voltage obtained after stepping down is used to power the second load.

[0060] For example, the second load could be an application processor (AP) or a haptic feedback module (HAPTIC), while the first load could be a display module (DISPLAY) or an audio module (AUDIO).

[0061] In some embodiments, when the battery pack comprises two batteries connected in series, the charge pump is used to boost the voltage when charging the battery pack; the charge pump is used to buck the voltage when the battery pack supplies power to the second load.

[0062] For example, when charging the battery pack, the charge pump can be a 1:2 charge pump to boost the voltage provided by the charging line before charging the battery pack.

[0063] The charging line can first be connected to the charging module in the terminal, and then the battery pack can be charged through the charging module. In this embodiment, when charging the battery pack 120, the charge pump 130 can be used to boost the voltage, so that the charging module can use only a combination of a buck converter and the charge pump 130 to charge the battery pack that requires a higher voltage, without having to use a more expensive boost converter (Bootstrapped Output Boost, BOB) to charge the battery pack.

[0064] When the battery pack supplies power to the second load, the charge pump can be a 2:1 charge pump, which can step down the larger voltage of the battery pack before supplying it to the second load. The charge pump can also function as both a 1:2 and a 2:1 charge pump.

[0065] In some embodiments, the charge pump 130 can be used to boost voltage when the charging line supplies power to the first load 140 via the charge pump 130.

[0066] The first load 140 requires a relatively high operating voltage, and the charging circuit itself may not be able to provide the voltage required by the first load 140. In this case, the voltage can be boosted by the charge pump 130 and then supplied to the first load 140 after boosting.

[0067] In some embodiments, the first load includes at least one of the following: an audio module; a display module.

[0068] The audio module and display module in the terminal can withstand higher operating voltages. The battery pack 120 supplies power directly to the first load 140 without going through the charge pump 130 to reduce the voltage. When the first load includes the audio module, the high volume performance of the terminal can be greatly improved. When the first load includes the display module, the performance of the high brightness screen can be improved, thus improving the user experience.

[0069] Figure 3 This is a schematic diagram of the architecture of a charging circuit according to an embodiment of the present disclosure.

[0070] like Figure 3 As shown, in some embodiments, the second end of the charge pump 130 is connected to the first end of the charging module 310 of the terminal, the second end of the charging module 310 is connected to the charging line, the charging module 310 includes a second switching unit 320, the charging module 310 implements the full charge cut-off function of the battery pack 120 based on the second switching unit 320, and the circuit is further used to: keep the second switching unit 320 closed to disable the full charge cut-off function of the charging module.

[0071] In some embodiments, the terminal's charging module 310 includes a built-in second switching unit 320 for implementing a full-charge cutoff function for the battery pack 120. However, in this embodiment, the second switching unit 320 cannot control the discharge of the battery pack 120 to the first load 140. In contrast, the embodiments of this disclosure, through the battery protection circuit 110, can achieve charging and discharging control of the battery pack 120, preventing overcharging during charging and controlling the discharge of the battery pack 120 to the first load 140 during charging. Therefore, the second switching unit 320 becomes ineffective, and the battery protection circuit 110 can better fulfill its function.

[0072] Furthermore, during the charging process, if the charging module 310 determines that the battery pack 120 is fully charged and makes a charging cut-off judgment, causing the second switch unit 320 to open, the first load 140 will lose power supply from the charging line and must rely on the power supply from the battery pack 120, which is an undesirable phenomenon. Therefore, in the embodiments of this disclosure, the charging circuit proposed in this disclosure can also keep the second switch unit 320 closed to disable the full-charge cut-off function of the charging module, avoiding the situation where the charging line cannot supply power to the first load 140 when the terminal is connected to the charging line due to the opening of the second switch unit 320.

[0073] Although the second switch unit 320 loses its full charge cut-off function, since the second switch unit 320 is a structure in the charging module 310, costs can be reduced and additional hardware modifications can be avoided by disabling its function rather than removing the structure from the charging module 310.

[0074] In some embodiments, the battery protection circuit 110 may reuse the battery protection board in the terminal.

[0075] The battery protection board may include at least a fuel gauge, a charging MOSFET, and a discharging MOSFET. In the embodiments of this disclosure, the battery protection circuit 110 can reuse the battery protection board in the terminal, the first switching unit 210 can reuse the charging MOSFET, and the first power detection unit can reuse the fuel gauge. Therefore, no additional hardware needs to be added to the terminal. The embodiments of this disclosure can be implemented by setting the control logic for the first switching unit 210 without making major changes to the hardware.

[0076] Embodiments of this disclosure also propose a terminal that includes a charging circuit as described in any of the above embodiments.

[0077] The embodiments of this disclosure also propose a battery protection method.

[0078] Figure 4 This is a schematic flowchart illustrating a battery protection method according to an embodiment of the present disclosure.

[0079] like Figure 4 As shown, the method is applied to a charging circuit as described in any of the above embodiments, and the method includes:

[0080] In step S401, when the terminal is connected to the charging line and the battery pack is fully charged, the connection between the first terminal and the second terminal of the battery protection circuit is disconnected.

[0081] The specific implementation process of the functions and roles of each step in the above method can be found in the implementation process of the corresponding structure in the above device, and will not be repeated here.

[0082] Embodiments of this disclosure also provide an electronic device, including: a processor and a memory; the memory for storing a computer program; and the processor for executing a battery protection method as described in any of the above embodiments by invoking the computer program.

[0083] Embodiments of this disclosure also provide a computer-readable storage medium having a computer program stored thereon, characterized in that the program, when executed by a processor, implements the battery protection method as described in any of the above embodiments.

[0084] Figure 5 This is a schematic block diagram illustrating a battery protection device 500 according to embodiments of the present disclosure. For example, device 500 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0085] Reference Figure 5 The device 500 may include one or more of the following components: processing component 502, memory 504, power supply component 506, multimedia component 508, audio component 510, input / output (I / O) interface 512, sensor component 514, and communication component 516.

[0086] Processing component 502 typically controls the overall operation of device 500, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the information receiving method described above. Furthermore, processing component 502 may include one or more modules to facilitate interaction between processing component 502 and other components. For example, processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and processing component 502.

[0087] Memory 504 is configured to store various types of data to support the operation of device 500. Examples of such data include instructions for any application or method operating on device 500, contact data, phonebook data, messages, pictures, videos, etc. Memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, 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 storage, flash memory, magnetic disk, or optical disk.

[0088] Power supply component 506 provides power to various components of device 500. Power supply component 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 500.

[0089] Multimedia component 508 includes a screen that provides an output interface between the device 500 and the user. 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 touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 508 includes a front-facing camera and / or a rear-facing camera. When the device 500 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0090] Audio component 510 is configured to output and / or input audio signals. For example, audio component 510 includes a microphone (MIC) configured to receive external audio signals when device 500 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 504 or transmitted via communication component 516. In some embodiments, audio component 510 also includes a speaker for outputting audio signals.

[0091] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, start buttons, and lock buttons.

[0092] Sensor assembly 514 includes one or more sensors for providing status assessments of various aspects of device 500. For example, sensor assembly 514 may detect the on / off state of device 500, the relative positioning of components such as the display and keypad of device 500, changes in position of device 500 or a component of device 500, the presence or absence of user contact with device 500, orientation or acceleration / deceleration of device 500, and temperature changes of device 500. Sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 514 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0093] Communication component 516 is configured to facilitate wired or wireless communication between device 500 and other devices. Device 500 can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G LTE, 5G NR, or combinations thereof. In one exemplary embodiment, communication component 516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 516 also includes a near-field communication (NFC) module to facilitate short-range communication. 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.

[0094] In an exemplary embodiment, the apparatus 500 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the information receiving method described above.

[0095] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 504 including instructions, which can be executed by the processor 520 of the device 500 to complete the above-described information receiving method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0096] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0097] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0098] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0099] The methods and apparatus provided in the embodiments of this disclosure have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this disclosure. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A charging circuit, characterized in that, Located in the terminal, the circuit includes: A battery protection circuit is included, wherein a first terminal of the battery protection circuit is connected to the battery pack, a second terminal of the battery protection circuit is connected to a first terminal of the charge pump, and the second terminal of the battery protection circuit is also connected to a first load; wherein... When the terminal is connected to the charging line and the battery pack is fully charged, the battery protection circuit disconnects the connection between the first terminal and the second terminal of the battery protection circuit.

2. The circuit according to claim 1, characterized in that, The battery protection circuit includes a first switching unit and a first diode. The first end of the first switching unit is connected to the battery pack, the second end of the first switching unit is connected to the first end of the charge pump, and the anode of the first diode is connected to the battery pack and the cathode is connected to the first end of the charge pump. Disconnecting the connection between the first terminal and the second terminal of the battery protection circuit includes: Disconnect the first switching unit.

3. The circuit according to claim 2, characterized in that, The circuit also includes: The first power detection unit is used to detect whether the battery pack is fully charged.

4. The circuit according to claim 3, characterized in that, The battery protection circuit closes the first switching unit under a first condition, wherein the first condition includes at least one of the following: The current passing through the first diode is greater than the current threshold. The duration during which the first diode is energized is greater than a duration threshold. The charging line is disconnected from the terminal.

5. The circuit according to any one of claims 1-4, characterized in that, The second end of the charge pump is connected to a second load, and the second load requires a lower operating voltage than the first load.

6. The circuit according to claim 5, characterized in that, In the case where the battery pack includes two batteries connected in series The charge pump is used to boost the voltage while the battery pack is being charged; The charge pump is used to step down the voltage when the battery pack supplies power to the second load.

7. The circuit according to any one of claims 1-4, characterized in that, The first load includes at least one of the following: Audio module; display module.

8. The circuit according to any one of claims 1-4, characterized in that, The second end of the charge pump is connected to the first end of the charging module of the terminal, and the second end of the charging module is connected to the charging line. The charging module includes a second switching unit, and the charging module implements a full-charge cutoff function for the battery pack based on the second switching unit. The circuit is also used for: Keep the second switch unit closed to disable the full charge cutoff function of the charging module.

9. The circuit according to any one of claims 1-4, characterized in that, The charging circuit includes at least one of the following: Wired charging circuit; wireless charging circuit.

10. An electronic device, characterized in that, The terminal includes a charging circuit as described in any one of claims 1-9.

11. A battery protection method, characterized in that, Applied to a charging circuit as described in any one of claims 1-9, the method comprises: When the terminal is connected to the charging line and the battery pack is fully charged, disconnect the connection between the first terminal and the second terminal of the battery protection circuit.

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