Charging circuit and intelligent terminal

Abstract

The embodiment of the invention belongs to the intelligent terminal technology, and provides a charging circuit and an intelligent terminal. The charging circuit comprises a photovoltaic module, a switch module, a detection module and a control module. The first end of the photovoltaic module is connected with the first end of the switch module, the second end of the photovoltaic module is connected with the first end of the detection module, and the third end of the photovoltaic module is grounded; the second end of the switch module is connected with the second end of the detection module, the third end of the switch module is connected with the first end of the control module, the fourth end of the switch module is connected with the positive electrode of the battery, and the fifth end of the switch module is connected with the negative electrode of the battery; the third end of the detection module is connected with the second end of the control module; the third end of the control module is connected with the positive electrode of the battery; and the control module is used for controlling the switch-on or switch-off of the switch module according to the output of the photovoltaic module detected by the detection module so as to adjust the charging parameters. Through the charging circuit, the charging efficiency in a weak-power photovoltaic scene can be effectively improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of charging. More specifically, it relates to a charging circuit and an intelligent terminal. Background Art

[0002] Weak power photovoltaic charging refers to the charging behavior when the photovoltaic receiving ability decreases and the output power is in a low state in rainy days, indoors, shaded environments, or when the area of the photovoltaic film is small. However, the existing photovoltaic charging circuits have poor charging efficiency in weak power photovoltaic scenarios. Summary of the Invention

[0003] The embodiments of the present application provide a charging circuit and an intelligent terminal to achieve the effect of improving the charging efficiency in weak power photovoltaic scenarios.

[0004] In a first aspect, the embodiments of the present application provide a charging circuit, including: a photovoltaic module, a switching module, a detection module, and a control module;

[0005] The first end of the photovoltaic module is connected to the first end of the switching module, the second end of the photovoltaic module is connected to the first end of the detection module, and the third end of the photovoltaic module is grounded;

[0006] The second end of the switching module is connected to the second end of the detection module, the third end of the switching module is connected to the first end of the control module, the fourth end of the switching module is used to connect to the positive electrode of the battery, and the fifth end of the switching module is used to connect to the negative electrode of the battery;

[0007] The third end of the detection module is connected to the second end of the control module, and the third end of the control module is used to connect to the positive electrode of the battery;

[0008] The control module is configured to control the switching module to conduct or turn off according to the output of the photovoltaic module detected by the detection module, so as to adjust the charging parameters.

[0009] Optionally, the switching module includes a switching unit and a switching driving unit;

[0010] The first end of the switching unit is connected to the first end of the photovoltaic module, the second end of the switching unit is connected to the second end of the detection module, the third end of the switching unit is used to connect to the positive electrode of the battery, and the fourth end of the switching unit is used to connect to the first end of the switching driving unit;

[0011] The second end of the switching driving unit is connected to the first end of the control module, and the third end of the switching driving unit is used to connect to the negative electrode of the battery;

[0012] The control module is configured to send a driving signal to the switch driving unit according to the output of the photovoltaic module, so that the switch driving unit drives the switch unit to conduct or turn off, so as to adjust the charging parameter.

[0013] Optionally, the switch unit includes: a first switch tube and a second switch tube;

[0014] The first end of the first switch tube is connected to the photovoltaic module, the second end of the first switch tube is connected to the first end of the second switch tube, and the third end of the first switch tube is connected to the first end of the switch driving unit;

[0015] The second end of the second switch tube is connected to the first end of the switch driving unit, the second end of the second switch tube is connected to the second end of the detection module, and the second end of the second switch tube is used to be connected to the positive electrode of the battery;

[0016] The control module is configured to generate a driving signal for adjusting the duty cycle of the first switch tube and / or the second switch tube according to the output of the photovoltaic module, so that the switch driving unit drives the first switch tube and / or the second switch tube based on the driving signal to adjust the charging parameter.

[0017] Optionally, the control module is specifically configured to:

[0018] When the output of the photovoltaic module is less than a preset threshold, generate a driving signal for reducing the duty cycle of the first switch tube and / or the second switch tube to a first preset duty cycle;

[0019] When the output of the photovoltaic module is greater than or equal to the preset threshold, generate a driving signal for increasing the duty cycle of the first switch tube and / or the second switch tube to a second preset duty cycle.

[0020] Optionally, the charging circuit further includes a voltage dividing module;

[0021] The first end of the voltage dividing module is connected to the second end of the switch driving unit, the second end of the voltage dividing module is connected to the first end of the control module, the third end of the voltage dividing module is used to be connected to the negative electrode of the battery, the fourth end of the voltage dividing module is connected to the second end of the second switch tube, and the fourth end of the voltage dividing module is further used to be connected to the positive electrode of the battery.

[0022] Optionally, the voltage dividing module includes a first resistor and a second resistor connected in series;

[0023] The first end of the first resistor is connected to the second end of the second switching transistor, and the first end of the first resistor is used to be connected to the positive electrode of the battery; the connection point of the first resistor and the second resistor forms a feedback node;

[0024] The first end of the second resistor is connected to the negative electrode of the battery;

[0025] The second end of the switching drive unit and the first end of the control module are respectively connected to the feedback node.

[0026] Optionally, the switching drive unit is further configured to:

[0027] Detect the voltage of the feedback node when the control module is not working;

[0028] Drive the first switching transistor and / or the second switching transistor to conduct or turn off according to the voltage of the feedback node, so as to adjust the charging parameter.

[0029] Optionally, the sources of the first switching transistor and the second switching transistor are connected to each other, and the drains of the first switching transistor and the second switching transistor are connected to each other.

[0030] Optionally, the charging circuit further includes a prompting component;

[0031] The prompting component is connected to the first end of the first switching transistor, and the prompting component is used to perform charging prompting.

[0032] This application further provides an intelligent terminal, including the charging circuit in any of the above embodiments.

[0033] The charging circuit and the intelligent terminal provided by the embodiments of this application. The charging circuit includes: a photovoltaic module, a switching module, a detection module, and a control module; the first end of the photovoltaic module is connected to the first end of the switching module, the second end of the photovoltaic module is connected to the first end of the detection module, and the third end of the photovoltaic module is grounded; the second end of the switching module is connected to the second end of the detection module, the third end of the switching module is connected to the first end of the control module, the fourth end of the switching module is used to be connected to the positive electrode of the battery, and the fifth end of the switching module is used to be connected to the negative electrode of the battery; the third end of the detection module is connected to the second end of the control module, and the third end of the control module is used to be connected to the positive electrode of the battery; the control module is configured to control the switching module to conduct or turn off according to the output of the photovoltaic module detected by the detection module, so as to adjust the charging parameter. Through the above charging circuit, the charging efficiency in a low-power photovoltaic scenario can be effectively improved. Description of the Drawings

[0034] To more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the related art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings.

[0035] Figure 1 Schematic diagram of the hardware structure of an intelligent terminal for implementing various embodiments of the present application;

[0036] Figure 2 Schematic diagram of a communication network system architecture provided by an embodiment of the present application;

[0037] Figure 3 Schematic diagram of the structure of a charging circuit provided by an embodiment of the present application Figure 1 ;

[0038] Figure 4 Schematic diagram of the structure of a charging circuit provided by an embodiment of the present application Figure 2 ;

[0039] Figure 5 Schematic diagram of the structure of a charging circuit provided by an embodiment of the present application Figure 3 ;

[0040] Figure 6 Schematic diagram of the structure of a charging circuit provided by an embodiment of the present application Figure 4 。

[0041] Through the above accompanying drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These accompanying drawings and the textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0042] To make the purpose, implementation manners, and advantages of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application in conjunction with the accompanying drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0043] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the subsequent implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0044] In addition, the terms "comprising", "having", and any variations thereof, are intended to cover a non-exclusive inclusion, e.g., a product or device that comprises a series of components does not have to be limited to those components clearly listed, but may include other components not clearly listed or inherent to such product or device.

[0045] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining". Furthermore, as used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or", "and / or", "including at least one of the following", etc. used in this application may be interpreted inclusively, or mean any one or any combination. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C", and again, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C". An exception to this definition occurs only when the combination of elements, functions, steps, or operations are inherently mutually exclusive in some way.

[0046] It should be understood that although the steps in the flowchart in the embodiments of this application are shown sequentially according to the indication of the arrows, these steps are not necessarily executed sequentially according to the order indicated by the arrows. Unless there is a clear indication in this application, the execution of these steps is not strictly limited in order and may be executed in other orders. Moreover, at least a part of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but may be executed at different times, and their execution order is not necessarily sequential, but may be executed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps.

[0047] Depending on the context, as used herein, the words "if" and "when" may be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" may be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0048] It should be noted that in this text, step codes such as S1, S2, etc. are adopted. The purpose is to more clearly and briefly express the corresponding content and do not constitute a substantial limitation in sequence. Those skilled in the art may execute S2 first and then S10 during specific implementation, but these should all be within the protection scope of this application.

[0049] It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0050] In subsequent descriptions, suffixes such as "module", "component", or "unit" used to represent elements are only for the convenience of explaining this application and have no specific meaning in themselves. Therefore, "module", "component", or "unit" can be used interchangeably.

[0051] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0052] The intelligent terminal can be implemented in various forms. For example, the intelligent terminal described in this application can include intelligent terminals such as mobile phones, tablet computers, laptop computers, handheld computers, personal digital assistants (PDAs), portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0053] In the subsequent description, the intelligent terminal will be taken as an example for illustration. Those skilled in the art will understand that except for elements specifically for intelligent purposes, the structure according to the embodiments of this application can also be applied to fixed-type terminals.

[0054] Please refer to Figure 1, which is a schematic diagram of the hardware structure of an intelligent terminal for implementing various embodiments of the present application. The intelligent terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (audio / video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111, etc. Those skilled in the art can understand that Figure 1 The structure of the intelligent terminal shown in

[0055] does not limit the intelligent terminal. The intelligent terminal may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements. Figure 1 The following specifically introduces each component of the intelligent terminal:

[0056] The RF unit 101 can be used for receiving and sending signals during information reception or call processes. Specifically, after receiving the downlink information from the base station, it is given to the processor 110 for processing; in addition, the uplink data is sent to the base station. Generally, the RF unit 101 includes, but is not limited to, antennas, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc. In addition, the RF unit 101 can also communicate with the network and other devices through wireless communication. The above wireless communication can use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), 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 Duplexing - Long Term Evolution), TDD-LTE (Time Division Duplexing - Long Term Evolution), and 5G, etc.

[0057] WiFi belongs to short-range wireless transmission technology. Through the WiFi module 102, the smart terminal can help users send and receive emails, browse the web, and access streaming media, etc., providing users with wireless broadband Internet access. Although Figure 1 the WiFi module 102 is shown, it can be understood that it does not belong to the essential components of the smart terminal and can be completely omitted within the scope of not changing the essence of the invention according to needs.

[0058] The audio output unit 103 can convert the 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 it as sound when the smart terminal 100 is in call signal reception mode, call mode, recording mode, voice recognition mode, broadcast reception mode, and other modes. Moreover, the audio output unit 103 can also provide audio output related to specific functions executed by the smart terminal 100 (such as call signal reception sound, message reception sound, etc.). The audio output unit 103 can include a speaker, a buzzer, etc.

[0059] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 can include a Graphics Processing Unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes the image data of still pictures or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The processed image frames can be displayed on the display unit 106. The processed image frames can be stored in the memory 109 (or other storage media) 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 call mode, recording mode, voice recognition mode, and other operating modes, and can process such sounds into audio data. The processed audio (voice) data can be output in a format that can be transmitted to the smart communication base station via the radio frequency unit 101 in the case of call mode. The microphone 1042 can implement various types of noise cancellation (or suppression) algorithms to eliminate (or suppress) the noise or interference generated during the reception and transmission of audio signals.

[0060] The intelligent terminal 100 further includes at least one type of sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the intelligent terminal 100 is close to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary, and can be used in applications for identifying the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometers, tapping), etc.; as for other sensors that the mobile phone can also be configured with, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be elaborated here.

[0061] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, and the display panel 1061 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

[0062] The user input unit 107 can be used to receive input digital or character information, and generate key signal inputs related to the user settings and function control of the intelligent terminal. Optionally, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect touch operations of the user on or near it (such as operations of the user using a finger, a stylus, or any suitable object or accessory on or near the touch panel 1071), and drive the corresponding connection device according to a pre-set program. The touch panel 1071 can include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the touch position of the user and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into touch point coordinates, and then sends it to the processor 110, and can receive and execute the commands sent by the processor 110. In addition, the touch panel 1071 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may further include other input devices 1072. Optionally, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power on / off keys, etc.), a trackball, a mouse, a joystick, etc., and specific details are not limited here.

[0063] Optionally, the touch panel 1071 may cover the display panel 1061. After the touch panel 1071 detects a touch operation on or near it, it is transmitted to the processor 110 to determine the type of touch event. Subsequently, the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of touch event. Although in Figure 1 , the touch panel 1071 and the display panel 1061 are implemented as two independent components to realize the input and output functions of the smart terminal, but in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to realize the input and output functions of the smart terminal, and specific details are not limited here.

[0064] The interface unit 108 serves as an interface through which at least one external device can be connected to the smart 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 with an identification module, an audio input / output (I / O) port, a video I / O port, a headset port, and so on. The interface unit 108 can be used to receive inputs from external devices (such as data information, power, etc.) and transmit the received inputs to one or more components within the smart terminal 100 or can be used to transfer data between the smart terminal 100 and external devices.

[0065] The memory 109 can be used to store software programs and various data. The memory 109 mainly includes a program storage area and a data storage area. Optionally, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, phone book, etc.). In addition, the memory 109 can include a high-speed random access memory and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0066] The processor 110 is the control center of the smart terminal, connecting various parts of the entire smart terminal using various interfaces and lines. By running or executing software programs and / or modules stored in the memory 109, and calling data stored in the memory 109, it executes various functions of the smart terminal and processes data, thereby monitoring the smart terminal as a whole. The processor 110 may include one or more processing units; preferably, the processor 110 can integrate an application processor and a modem processor. Optionally, the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 110 either.

[0067] The intelligent terminal 100 may further include a power supply 111 (such as a battery) for powering each component. Preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system.

[0068] Although Figure 1 not shown, the intelligent terminal 100 may further include a Bluetooth module, etc., which will not be elaborated here.

[0069] To facilitate the understanding of the embodiments of the present application, the communication network system on which the intelligent terminal of the present application is based will be described below.

[0070] Please refer to Figure 2 , Figure 2 FIG. 16 is an architecture diagram of a communication network system provided by an embodiment of the present application. The communication network system is an LTE system of general intelligent communication technology. The LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are communicatively connected in sequence.

[0071] Optionally, the UE 201 may be the above terminal 100, which will not be elaborated here.

[0072] The E-UTRAN 202 includes an eNodeB 2021 and other eNodeBs 2022, etc. Optionally, the eNodeB 2021 may be connected to other eNodeBs 2022 through a backhaul (such as an X2 interface), the eNodeB 2021 is connected to the EPC 203, and the eNodeB 2021 may provide access for the UE 201 to the EPC 203.

[0073] EPC 203 may include a Mobility Management Entity (MME) 2031, a Home Subscriber Server (HSS) 2032, other MMEs 2033, a Serving GateWay (SGW) 2034, a PDN Gate Way (PGW) 2035, a Policy and Charging Rules Function (PCRF) 2036, etc. Optionally, the MME 2031 is a control node that processes signaling between the UE 201 and the EPC 203 and provides bearer and connection management. The HSS 2032 is used to provide some registers to manage functions such as a home location register (not shown in the figure) and stores some user-specific information such as service characteristics and data rate. All user data can be sent through the SGW 2034. The PGW 2035 can provide IP address allocation for the UE 201 and other functions. The PCRF 2036 is a policy and charging control policy decision point for service data flows and IP bearer resources, and it selects and provides available policy and charging control decisions for a policy and charging enforcement function unit (not shown in the figure).

[0074] The IP service 204 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), or other IP services, etc.

[0075] Although the above has been described by taking the LTE system as an example, those skilled in the art should be aware that this application is not only applicable to the LTE system, but also applicable to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G, and future new network systems (such as 6G), etc., which are not limited herein.

[0076] Based on the above intelligent terminal hardware structure and communication network system, various embodiments of this application are proposed.

[0077] As described above, the current photovoltaic charging circuit has poor charging efficiency in a weak power photovoltaic scenario, and the user experience is not good.

[0078] To solve the above problems, the embodiments of this application provide a charging circuit and an intelligent terminal. By detecting the output of the photovoltaic module and adjusting the charging parameters based on the detection result, the charging efficiency in a weak power photovoltaic scenario is improved.

[0079] The following uses specific embodiments to elaborate in detail on the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following several alternative embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0080] Figure 3 As shown in the schematic structural diagram of a charging circuit provided by an embodiment of the present application, Figure 3 it includes: a photovoltaic module 1, a switch module 2, a detection module 3, and a control module 4.

[0081] The first end of the photovoltaic module 1 is connected to the first end of the switch module 2, the second end of the photovoltaic module 1 is connected to the first end of the detection module 3, and the third end of the photovoltaic module 1 is grounded.

[0082] The second end of the switch module 2 is connected to the second end of the detection module 3, the third end of the switch module 2 is connected to the first end of the control module 4, the fourth end of the switch module 2 is used to connect to the positive electrode of the battery, and the fifth end of the switch module 2 is used to connect to the negative electrode of the battery. The third end of the detection module 3 is connected to the second end of the control module 4.

[0083] Among them, the battery can be the battery to be charged. The first end of the photovoltaic module 1, the first end and the third end of the switch module 2 can form a charging path for the battery.

[0084] Optionally, the photovoltaic module 1 is used to convert the absorbed light energy (for example, sunlight, ambient light, illumination light, etc.) into electrical energy to provide an electrical energy source for the battery. For example, the photovoltaic module 1 can be a photovoltaic panel, etc.

[0085] Optionally, the switch module 2 can be turned off or on at a preset frequency, so as to adjust the current and / or voltage of the electrical energy flowing through the switch module 2. For example, the switch module 2 can include one or more switching tubes (for example, triode, MOS tube, etc.).

[0086] Optionally, the detection module 3 is used to detect the current and / or voltage of the electrical energy output by the photovoltaic module 1. For example, the detection module 3 can include a voltage division circuit and an amplification circuit. The voltage of the electrical energy output by the photovoltaic module 1 is sampled through the voltage division circuit, and the sampled voltage is signal-conditioned through the amplification circuit (for example, a differential amplifier and a comparator) to output the detected voltage. When the electrical energy output by the photovoltaic module 1 flows through the switch module 2, a voltage drop will be generated on its on-resistance (Rdson). The detection module 3 can use the on-resistance (Rdson) of the switch module 2 as a current sampling resistor through the amplification circuit to measure its voltage drop and detect the current.

[0087] Optionally, when the detection module 3 detects the current and / or voltage of the electric energy output by the photovoltaic module 1, it can output the detection result to the control module 4.

[0088] Optionally, the control module 4 is configured to estimate the light intensity of the photovoltaic module 1 according to the current and / or voltage of the electric energy output by the photovoltaic module 1 obtained, and generate a driving signal based on the light intensity to adjust the disconnection or conduction frequency of the switching module 2, so as to adjust the charging parameter, so that the photovoltaic module 1 maintains a relatively constant output impedance to improve the charging efficiency. For example, the control module 4 can be a single-chip microcomputer, a DSP chip, an FPGA chip or an MCU. When the control module 4 estimates that the light intensity of the photovoltaic module 1 is weak, it reduces the disconnection or conduction frequency (duty cycle) of the switching module 2 to implement a charging strategy of small current and high voltage. When the control module 4 estimates that the light intensity of the photovoltaic module 1 is strong, it realizes a fast charging scheme of low voltage and high current through the disconnection or conduction frequency (duty cycle) of the switching module 2, thereby improving the charging efficiency of the battery.

[0089] Optionally, please continue to refer to Figure 3 , the third terminal of the control module 4 is used to connect to the positive electrode of the battery. The control module 4 can also detect the battery voltage through the third terminal. When the battery voltage reaches the saturation voltage, it can drive the switching module 2 to turn off to achieve overcharge protection of the battery.

[0090] The charging circuit provided by the embodiment of the present application includes: a photovoltaic module, a switching module, a detection module and a control module; the first terminal of the photovoltaic module is connected to the first terminal of the switching module, the second terminal of the photovoltaic module is connected to the first terminal of the detection module, and the third terminal of the photovoltaic module is grounded; the second terminal of the switching module is connected to the second terminal of the detection module, the third terminal of the switching module is connected to the first terminal of the control module, the fourth terminal of the switching module is used to connect to the positive electrode of the battery, and the fifth terminal of the switching module is used to connect to the negative electrode of the battery; the third terminal of the detection module is connected to the second terminal of the control module, and the third terminal of the control module is used to connect to the positive electrode of the battery; the control module is configured to control the switching module to conduct or turn off according to the output of the photovoltaic module detected by the detection module to adjust the charging parameter. By detecting the output of the photovoltaic module and adjusting the disconnection or conduction frequency of the switching module to adjust the current or voltage of the battery charging, the charging efficiency can be improved in a weak photovoltaic scenario.

[0091] Figure 4 is a schematic structural diagram of the charging circuit provided by the embodiment of the present application Figure 2 , as Figure 4 shown, the switching module 2 includes a switching unit 21 and a switching driving unit 22.

[0092] The first end of the switch unit 21 is connected to the first end of the photovoltaic module 1. The second end of the switch unit 21 is connected to the second end of the detection module 3. The third end of the switch unit 21 is used to be connected to the positive electrode of the battery. The fourth end of the switch unit 21 is used to be connected to the first end of the switch driving unit 22. The electric energy output by the photovoltaic module 1 is input to the battery through the switch unit 21, forming a charging path for the battery.

[0093] The second end of the switch driving unit 22 is connected to the first end of the control module 4. The third end of the switch driving unit is used to be connected to the negative electrode of the battery.

[0094] The detection module 3 measures the magnitude of the current when the electric energy output by the photovoltaic module 1 flows through the switch module 2 through the connection with the switch module 2, and sends the detection result to the control module 4. The specific measurement method is similar to that in the Figure 3 embodiment shown, and will not be elaborated here.

[0095] When the control module 4 obtains the current and / or voltage sent by the detection module 3, it can estimate the light intensity of the photovoltaic module 1 based on the current and / or voltage, generate a corresponding driving signal based on the light intensity, and send the driving signal to the switch driving unit 22. When the switch driving unit 22 receives the driving signal, it can drive the switch unit 21 to disconnect or conduct based on the driving signal to adjust the charging parameters.

[0096] Optionally, please continue to refer to Figure 4 , the switch unit 21 includes a first switching tube Q1 and a second switching tube Q2. The first end of the first switching tube Q1 is connected to the photovoltaic module 1. The second end of the first switching tube Q1 is connected to the first end of the second switching tube Q2. The third end of the first switching tube Q1 is connected to the first end of the switch driving unit 22.

[0097] The second end of the second switching tube Q2 is connected to the first end of the switch driving unit 22. The second end of the second switching tube Q2 is connected to the second end of the detection module 3. And, the second end of the second switching tube Q2 is used to be connected to the positive electrode of the battery. The electric energy output by the photovoltaic module 1 is input to the battery through the first switching tube Q1 and the second switching tube Q2, forming a charging path for the battery.

[0098] The detection module 3 measures the magnitude of the current when the electric energy output by the photovoltaic module 1 flows through the first switching tube Q1 and the second switching tube Q2 through the connection with the first switching tube Q1 and the second switching tube Q2, and sends the detection result to the control module 4. The specific measurement method is similar to that in the Figure 3 embodiment shown, and will not be elaborated here.

[0099] When the control module 4 obtains the current and / or voltage sent by the detection module 3, it can estimate the light intensity of the photovoltaic module 1 based on the current and / or voltage, generate a driving signal for adjusting the duty ratio of the first switching tube and / or the second switching tube based on the light intensity, and send the driving signal to the switching drive unit 22. When the switching drive unit 22 receives the driving signal, it can drive the first switching tube Q1 and / or the second switching tube Q2 to turn off or on based on the driving signal to adjust the charging parameters.

[0100] Optionally, the first switching tube Q1 and the second switching tube Q2 can be switches with switching functions such as triodes and MOS tubes. Taking the first switching tube Q1 and the second switching tube Q2 as MOS tubes as an example, the first switching tube Q1 and the second switching tube Q2 can be PMOS tubes or NMOS tubes.

[0101] Optionally, the sources of the first switching tube Q1 and the second switching tube Q2 are connected to each other, and the drains of the first switching tube Q1 and the second switching tube Q2 are connected to each other (that is, the first switching tube Q1 and the second switching tube Q2 are connected in a back-to-back or head-to-head manner to form a switch circuit that can be switched in both positive and negative directions). The gates of the first switching tube Q1 and the second switching tube Q2 are connected to the switching drive unit.

[0102] Optionally, the switching module composed of the switching drive unit 22 and the first switching tube Q1 and the second switching tube Q2 can be implemented by building with discrete components or chips such as LDO chips or OVP chips that contain similar structures.

[0103] Figure 5 Schematic diagram of the structure of the charging circuit provided for the application embodiment Figure 3 , such as Figure 5 shown, the charging circuit further includes a voltage dividing module 5.

[0104] The first end of the voltage dividing module 5 is connected to the second end of the switching drive unit 21, the second end of the voltage dividing module 5 is connected to the first end of the control module 4, the third end of the voltage dividing module 5 is used to be connected to the negative electrode of the battery, the fourth end of the voltage dividing module 5 is connected to the second end of the second switching tube Q2, and the fourth end of the voltage dividing module 5 is used to be connected to the positive electrode of the battery.

[0105] The voltage dividing module 5 is used to step down the high voltage output by the photovoltaic module 1 to the charging voltage required by the battery to protect the battery from overvoltage.

[0106] Please continue to refer to Figure 5, the voltage dividing module 5 includes a first resistor R1 and a second resistor R2 connected in series. The first end of the first resistor R1 is connected to the second end of the second switching transistor Q2, and the first end of the first resistor R1 is used to connect to the positive electrode of the battery; the connection point of the first resistor R1 and the second resistor R2 forms a feedback node FB; the first end of the second resistor R2 is connected to the negative electrode of the battery; the second end of the switching drive unit 22 and the first end of the control module 4 are respectively connected to the feedback node FB.

[0107] For example, the control module 4 estimates the light intensity of the photovoltaic module 1 based on the current and / or voltage sent by the detection module 3, generates a drive signal for driving the duty cycle of the first switching transistor Q1 and / or the second switching transistor Q2 based on the light intensity, and sends the drive signal to the switching drive unit 22, so that the switching drive unit 22 drives the first switching transistor Q1 and / or the second switching transistor Q2 to turn off or on according to the drive signal. At the same time, the control module 4 can collect the feedback voltage at the feedback node FB, form an error signal based on the feedback voltage and the voltage sent by the detection module 3, generate an adjustment drive signal for adjusting the duty cycle of the first switching transistor Q1 and / or the second switching transistor Q2 based on the error signal, and send the adjustment drive signal to the switching drive unit 22, so that the switching drive unit 22 adjusts the duty cycle of the first switching transistor Q1 and / or the second switching transistor Q2 according to the adjustment drive signal, thereby further improving the accuracy of charging parameter adjustment.

[0108] Optionally, when the control module 4 is not working, the switching drive unit 22 can also detect the voltage of the feedback node; drive the first switching transistor Q1 and / or the second switching transistor Q2 to conduct or turn off according to the voltage of the feedback node, so as to adjust the charging parameters. Or, the switching drive unit 22 can also detect the voltage of the feedback node to perform overvoltage protection on the battery. For example, when the voltage of the feedback node is greater than a preset value, the first switching transistor Q1 is forced to turn off to achieve overvoltage protection of the battery.

[0109] Figure 6 Schematic diagram of the structure of the charging circuit provided by the application embodiment Figure 4 , such as Figure 6 shown, the charging circuit further includes a prompting component 6.

[0110] The prompting component 6 is connected to the first end of the first switching transistor Q1 and the photovoltaic module, and the prompting component 6 is used for charging prompting. For example, the prompting component 6 can be composed of one or more combinations of components with status prompting functions such as an LED, a buzzer, a speaker, a vibration motor, etc. During the process of the photovoltaic module 1 outputting electric energy, power can be supplied to and the prompting component 6 can be started to perform status prompting on the charging process.

[0111] Optionally, since the first switching transistor Q1 and the second switching transistor Q2 are connected in a back-to-back or head-to-head manner to form a switching circuit that can be switched in both forward and reverse directions, the charging circuit provided in the embodiments of the present application can also supply power from the battery to the photovoltaic module 1 to achieve the reverse charging function.

[0112] Optionally, during reverse charging, the switch driving unit 21 can forcibly turn on the first switching transistor Q1 and the first switching transistor Q2 to supply power from the battery to the prompting component 6 and start it, so as to prompt the reverse charging process.

[0113] The present application also provides an intelligent terminal, which includes the charging circuit provided in any of the above embodiments, and details are not described again in the embodiments of the present application.

[0114] It can be understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of the present application. The technical solutions of the present application can also be applied to other scenarios. For example, as is known to those of ordinary skill in the art, with the evolution of the system architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

[0115] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0116] The steps in the method of the embodiments of the present application can be adjusted, combined, and deleted according to actual needs.

[0117] The units in the devices of the embodiments of the present application can be combined, divided, and deleted according to actual needs.

[0118] In the present application, for the description of the same or similar term concepts, technical solutions, and / or application scenarios, generally only the first detailed description is made when it appears for the first time. When it appears repeatedly later, for the sake of brevity, it is generally not described again. When understanding the technical solutions and other contents of the present application, for the same or similar term concepts, technical solutions, and / or application scenarios that are not detailed later, reference can be made to the relevant detailed descriptions before.

[0119] In the present application, the descriptions of the various embodiments have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0120] The technical features of the technical solutions of the present application can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope recorded in the present application.

[0121] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the methods of each embodiment of the present application.

[0122] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium that the computer can access, or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, storage disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a Solid State Disk (SSD)), etc.

[0123] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, is similarly included in the patent protection scope of the present application.

Claims

1. A charging circuit, characterized in that: include: Photovoltaic modules, switch modules, detection modules and control modules; The first end of the photovoltaic assembly is connected to the first end of the switch module, the second end of the photovoltaic assembly is connected to the first end of the detection module, and the third end of the photovoltaic assembly is grounded; The second end of the switch module is connected to the second end of the detection module, the third end of the switch module is connected to the first end of the control module, the fourth end of the switch module is used to connect to the positive electrode of the battery, and the fifth end of the switch module is used to connect to the negative electrode of the battery; The third end of the detection module is connected to the second end of the control module, and the third end of the control module is used to be connected to the positive electrode of the battery; The control module is used to control the switch module to be turned on or off according to the output of the photovoltaic assembly detected by the detection module, so as to adjust the charging parameters.

2. The charging circuit according to claim 1, characterized in that: The switch module includes a switch unit and a switch driving unit; The first end of the switch unit is connected to the first end of the photovoltaic assembly, the second end of the switch unit is connected to the second end of the detection module, the third end of the switch unit is used to be connected to the positive electrode of the battery, and the fourth end of the switch unit is used to be connected to the first end of the switch drive unit; The second end of the switch driving unit is connected to the first end of the control module, and the third end of the switch driving unit is used to be connected to the negative electrode of the battery; The control module is used to send a driving signal to the switch driving unit according to the output of the photovoltaic component, so that the switch driving unit drives the switch unit to be turned on or off to adjust the charging parameters.

3. The charging circuit according to claim 2, characterized in that: The switch unit comprises: a first switch tube and a second switch tube; The first end of the first switch tube is connected to the photovoltaic assembly, the second end of the first switch tube is connected to the first end of the second switch tube, and the third end of the first switch tube is connected to the first end of the switch driving unit; The second end of the second switch tube is connected to the first end of the switch driving unit, the second end of the second switch tube is connected to the second end of the detection module, and the second end of the second switch tube is used to be connected to the positive electrode of the battery; The control module is used to generate a driving signal for the first switch tube and / or adjust the duty cycle of the second switch tube according to the output of the photovoltaic component, so that the switch driving unit drives the first switch tube and / or the second switch tube based on the driving signal to adjust the charging parameters.

4. The charging circuit according to claim 3, characterized in that: The control module is specifically used for: When the output of the photovoltaic assembly is less than a preset threshold, generating a driving signal for reducing the duty cycle of the first switch tube and / or the second switch tube to a first preset duty cycle; When the output of the photovoltaic component is greater than or equal to a preset threshold, a driving signal is generated to increase the duty cycle of the first switch tube and / or the second switch tube to a second preset duty cycle.

5. The charging circuit according to claim 4, characterized in that: The charging circuit also includes a voltage dividing module; The first end of the voltage divider module is connected to the second end of the switch driving unit, the second end of the voltage divider module is connected to the first end of the control module, the third end of the voltage divider module is used to be connected to the negative electrode of the battery, the fourth end of the voltage divider module is connected to the second end of the second switch tube, and the fourth end of the voltage divider module is also used to be connected to the positive electrode of the battery.

6. The charging circuit according to claim 5, characterized in that: The voltage dividing module includes a first resistor and a second resistor connected in series; The first end of the first resistor is connected to the second end of the second switch tube, and the first end of the first resistor is used to be connected to the positive electrode of the battery; the connection point between the first resistor and the second resistor constitutes a feedback node; The first end of the second resistor is connected to the negative electrode of the battery; The second end of the switch driving unit and the first end of the control module are respectively connected to the feedback node.

7. The charging circuit according to claim 6, characterized in that: The switch driving unit is also used for: When the control module is not working, detecting the voltage of the feedback node; The first switch tube and / or the second switch tube are driven to be turned on or off according to the voltage of the feedback node to adjust the charging parameter.

8. The charging circuit according to any one of claims 3 to 7, characterized in that: The sources of the first switch tube and the second switch tube are connected to each other, and the drains of the first switch tube and the second switch tube are connected to each other.

9. The charging circuit according to claim 8, characterized in that: The charging circuit also includes a prompt component; The prompt component is connected to the first end of the first switch tube, and the prompt component is used for charging prompt.

10. An intelligent terminal, characterized in that: The charging circuit comprises the charging circuit as claimed in any one of claims 1 to 9.

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