Charging circuit with multiple charging modes and watch

Abstract

The utility model provides a charging circuit with multiple charging modes and a watch. The charging circuit comprises a plurality of charging modules, a power management module, an energy storage module, a function module and an input detection module, the charging modules are connected with the power management module, the power management module is connected with the energy storage module, and the energy storage module is connected with the function module and used for distributing electric energy. The charging module comprises any multiple of a wired charging module, a wireless charging module and an optical energy charging module; the input detection module is connected with each charging module and is used for detecting the electric energy input state of each charging module; and the power management module is connected with the input detection module and is used for acquiring the electric energy input state detected by the input detection module and controlling the connection and disconnection of each charging module. According to the charging circuit with multiple charging modes and the watch provided by the invention, the charging modes are enriched, the charging circuit has relatively high cruising ability, the charging circuit can be reasonably detected and managed, and the safety performance is enhanced.

Description

Technical Field

[0001] This application relates to the field of watch technology, and in particular to a charging circuit with multiple charging modes and a watch. Background Technology

[0002] A smartwatch is a wearable device with many smart functions. It usually not only has the traditional watch function of time display, but also provides a variety of functions such as health monitoring, message notification, voice assistant, activity tracking, and even payment.

[0003] In existing technologies, the integration of multi-functional modules in smartwatches has gradually increased the demand for power, posing new requirements for the battery life of smartwatches. However, existing technologies generally rely on a single charging method, which cannot meet the charging needs. On the other hand, as the requirements for battery life increase, the capacity of energy storage modules is often increased. However, relying on a single charging mode, such as wired charging, during the charging process can easily lead to overheating of the charging interface or charging circuit, causing safety hazards.

[0004] Therefore, a solution is needed to address at least one of the above problems. Utility Model Content

[0005] In view of at least one of the defects in the prior art, this application proposes a charging circuit and a watch with multiple charging modes.

[0006] The technical solution adopted by this application to solve at least one of the above-mentioned technical problems is as follows:

[0007] A charging circuit with multiple charging modes includes: multiple charging modules, a power management module, an energy storage module, a functional module, and an input detection module;

[0008] Each of the charging modules is connected to the power management module, the power management module is connected to the energy storage module, and the energy storage module is connected to the functional module for distributing the use of electrical energy.

[0009] The charging module includes any and multiple of wired charging modules, wireless charging modules, and solar charging modules; the input detection module is connected to each of the charging modules respectively to detect the power input status of each of the charging modules.

[0010] The power management module is connected to the input detection module to obtain the power input status detected by the input detection module and to control the connection and disconnection of each charging module.

[0011] In one specific embodiment, a power path switching module is also included;

[0012] One end of the power path switching module is connected to each of the charging modules, and the other end is connected to the power management module.

[0013] In one specific embodiment, a power protection circuit is also included, one end of which is connected to the power management module and the other end of which is connected to the energy storage module.

[0014] In one specific embodiment, the power protection circuit includes one or any combination of overvoltage protection, overcurrent protection, short circuit protection, and reverse polarity protection.

[0015] In one specific embodiment, the wired charging module includes: an interface, a cross-point logic chip, an overvoltage protector, a buck converter, an input filter circuit, and an output filter circuit;

[0016] One end of the cross-point logic chip is connected to the interface, and the other end is connected to the main control module. The main control module is connected to the power management module.

[0017] The input terminal of the buck converter is connected to the interface through the input filter circuit, and the output terminal is connected to the power management module through the output filter circuit.

[0018] The interface is grounded, the overvoltage protector is connected in parallel between the power bus and the ground wire of the interface, and the input filter circuit is connected in series with the buck converter.

[0019] In one specific embodiment, the wireless charging module includes: a receiving coil, a rectifier, a filter, a boost converter, and a load switch;

[0020] The input terminal of the rectifier is connected to the receiving coil, the output terminal of the rectifier is connected to the filter, the filter is connected to the boost converter, and the boost converter is connected to the power management module through the load switch.

[0021] In one specific embodiment, the solar charging module includes: a solar panel unit, an MPPT controller, a step-down converter, an energy storage buffer capacitor, and a light sensor;

[0022] The input terminal of the MPPT controller is connected to the solar panel unit, and the output terminal is connected to the buck converter, which is connected to the power management module.

[0023] One end of the energy storage buffer capacitor is connected to the output terminal of the MPPT controller, and the other end is connected to the input terminal of the buck converter;

[0024] The light sensor is connected to both the solar panel unit and the power management module.

[0025] In one specific embodiment, a status feedback module is also included, which is connected to the input detection module to indicate the power input status of each of the charging modules.

[0026] A watch with multiple charging modes, comprising a charging circuit with multiple charging modes as described in any of the claims in the first part above.

[0027] In one specific embodiment, it also includes a dial and a strap;

[0028] The wired charging module's interface is located on the side wall of the dial, the wireless charging module's receiving coil is located in the watch strap, and the solar panel unit of the solar charging module is located on the outer surface of the dial and is arranged along the circumferential direction of the dial.

[0029] Beneficial effects:

[0030] This application provides a charging circuit and watch with multiple charging modes, which enriches the charging modes, has a strong battery life, and can reasonably detect and manage the charging circuit, thus enhancing safety performance. Specifically, it is equipped with multiple different charging modules to meet the charging needs of different charging modes, which can effectively extend the battery life. An input detection module is set to detect the charging status of each charging module. When a charging module overheats, it can intelligently switch to other charging modules, which avoids conflicts between different charging modules to a certain extent. While achieving continuous charging, it also reduces safety hazards and enhances safety performance. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the charging circuit composition for the multiple charging modes in this embodiment. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the charging circuit composition for the multiple charging modes in this embodiment. Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the wired charging module in this embodiment;

[0035] Figure 4 This is a schematic diagram of the wireless charging module in this embodiment;

[0036] Figure 5 This is a schematic diagram of the composition of the photovoltaic charging module in this embodiment;

[0037] Figure 6 This is a structural diagram of the watch with multiple charging modes in this embodiment.

[0038] Figure label:

[0039] 1-Charging module; 11-Wired charging module; 12-Wireless charging module; 13-Solar charging module; 2-Power management module; 21-Path switching module; 22-Power protection circuit; 3-Input detection module; 4-Energy storage module; 5-Function module; 6-Status feedback module; 7-Dial; 71-Interface; 72-Solar panel unit; 8-Watch strap; 81-Receiver coil. Detailed Implementation

[0040] Various embodiments of this disclosure will be described more fully below. This disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of this disclosure to the specific embodiments disclosed herein, but rather this disclosure should be understood to cover all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of this disclosure.

[0041] In the following, the terms “comprising” or “may include”, which may be used in various embodiments of this disclosure, indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of this disclosure, the terms “comprising,” “having,” and their cognates are intended only to indicate a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or the possibility of adding one or more combinations of the foregoing.

[0042] In various embodiments of this disclosure, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0043] The terms used in the various embodiments of this disclosure (such as "first," "second," etc.) may modify various components in the various embodiments, but do not limit the corresponding components. For example, the above terms do not limit the order and / or importance of the components. The above terms are only used for the purpose of distinguishing one component from others. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, a first component may be referred to as a second component without departing from the scope of the various embodiments of this disclosure, and similarly, a second component may also be referred to as a first component.

[0044] It should be noted that if a description is made of "connecting" one component to another, then the first component can be directly connected to the second component, and a third component can be "connected" between the first and second components. Conversely, when a component is "directly connected" to another component, it can be understood that there is no third component between the first and second components.

[0045] The term "user" as used in various embodiments of this disclosure may refer to a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

[0046] The terminology used in the various embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this disclosure pertain. Terms (such as those defined in a generally used dictionary) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this disclosure.

[0047] Example

[0048] This application provides a charging circuit with multiple charging modes, such as... Figure 1 and Figure 2 As shown, it includes: multiple charging modules 1, power management module 2, energy storage module 4, functional module 5, and input detection module 3;

[0049] Each charging module 1 is connected to the power management module 2, the power management module 2 is connected to the energy storage module 4, and the energy storage module 4 is connected to the functional module 5 for distributing the use of electrical energy.

[0050] Specifically, in some embodiments of this application, functional module 5 is used to support the basic and extended functions of the electronic device, such as displaying time, heart rate calculation, health management, etc., and is the implementation module of these functions;

[0051] Of course, no restrictions are placed on the specific functions of functional module 5.

[0052] For example, in some embodiments of this application, the power management module 2 may be provided with power conversion elements such as buck converters, boost converters, buck-boost converters, linear regulators, etc.; it may also be provided with monitoring elements such as power monitoring chips; it may also be provided with intelligent management elements such as multi-protocol charging controllers, digital power management ICs; or it may be provided with power switching elements and thermal management elements.

[0053] For example, the specific model of the buck converter can be LM2596, MP2315 or RT7272; the specific model of the boost converter can be TPS61088 or MT3608.

[0054] The specific models of the buck-boost converter can be LTC3780 or SGM6603; the specific models of the linear regulator can be AMS1117, LM7805 or TPS7A47.

[0055] The specific model of the power monitoring chip can be MAX809 or TPS3808, which monitors voltage thresholds and supports reset signal output;

[0056] The specific models of the multi-protocol charging controller can be BQ24075 or MAX77734 to support USB-PD / QC fast charging protocols and integrate temperature compensation and battery health monitoring; the specific models of the digital power management IC can be IRPS5401 or LTC2977; the specific models of the power MOSFET can be IRF540 or AO3400; and the specific models of the thermal management component can be LM75 or ADT7410 to detect circuit temperature.

[0057] Of course, there are no restrictions on the number or type of components in the power management module 2. The charging module 1 includes any number of wired charging modules 11, wireless charging modules 12, and solar charging modules 13.

[0058] The inclusion of multiple charging modules 1 enriches the charging modes of the charging circuit, including wired charging, wireless charging, and solar charging. These multiple charging modes complement each other to adapt to diverse usage scenarios.

[0059] Among them, the wired charging mode has a faster charging speed, which can meet the needs of most usage situations.

[0060] Wireless charging is even more convenient, eliminating the hassle of plugging and unplugging cables and improving the convenience and comfort of charging.

[0061] The solar charging mode can use ambient light to charge the device, replenishing its power during use and extending its battery life.

[0062] One end of the input detection module 3 is connected to each charging module 1 to detect the power input status of each charging module 1;

[0063] The power management module 2 is connected to the other end of the input detection module 3 to obtain the power input status detected by the input detection module 3 and to control the connection and disconnection of each charging module 1.

[0064] For example, the power input status detected by the input detection module 3 can be the presence and magnitude of the voltage and current of each charging module 1, or information such as the temperature of each charging module 1.

[0065] Understandably, the input detection module 3 can detect the power status of each charging module 1 in real time, so that each charging module 1 can operate under normal power conditions. When a charging module 1 malfunctions, the power management module 2 can automatically disconnect the faulty module based on the feedback from the input detection module 3 to prevent the fault from spreading and improve the reliability and stability of the charging circuit.

[0066] It can also avoid conflicts and interference between different charging modes to a certain extent. For example, when both wired charging module 11 and wireless charging module 12 are detected to be connected, the wired charging module 11 or wireless charging module 12 will be disconnected according to the preset logic.

[0067] Specifically, in some embodiments of this application, when both the wired charging module 11 and the wireless charging module 12 are detected to be connected, the wireless charging module 12 is disconnected according to a preset logic.

[0068] As another example, the power management module 2 is used to disconnect from the wired charging module 11 and connect to the wireless charging module 12 after the input detection module 3 detects that the wired charging module 11 is too hot, so as to realize the switching between multiple charging modes; thereby reducing the overheating of the wired charging module 11, improving charging safety, and effectively maintaining charging efficiency.

[0069] Furthermore, such as Figure 2 As shown, it also includes a power path switching module 21;

[0070] One end of the power path switching module 21 is connected to each charging module 1, and the other end is connected to the power management module 2.

[0071] Understandably, the power path switching module 21 can intelligently manage multiple charging modes, and can automatically select the optimal charging module 1 for power input based on priority or real-time status (such as input voltage and current); for example, it can prioritize the use of wired charging module 11 or wireless charging module 12 for charging, and use the solar charging module 13 as a backup, thereby avoiding conflicts between multiple charging modules 1.

[0072] When the power of each charging module 1 changes, for example when both the wired charging module 11 and the wireless charging module 12 are disconnected, it can quickly switch to the connection state with the solar charging module 13 to replenish power and ensure power supply continuity, thereby improving battery life.

[0073] In addition, by isolating different power paths, it can prevent reverse current or voltage backflow from damaging the charging module 1, and also help to change the dependence of the energy storage module 4 on a single power source.

[0074] For example, the power path switching module 21 may include MOSFETs / ideal diodes as electronic switches to control the on / off state of each power path; for example, back-to-back MOSFETs are used to isolate wired, wireless and solar charging inputs; a power management IC is used to integrate multi-input detection and switching logic to support dynamic priority configuration; and a voltage comparator is used to monitor the voltage of each input power supply and trigger switching conditions.

[0075] Of course, there are no restrictions on the specific components of the power path switching module 21, as long as it can switch between disconnection and connection of each charging module 1.

[0076] Furthermore, such as Figure 2 As shown, it also includes a power protection circuit 22, one end of which is connected to the power management module 2 and the other end is connected to the energy storage module 4.

[0077] Understandably, the power protection circuit 22 helps protect the energy storage module 4, such as preventing overcurrent, short circuit or voltage abnormality from directly impacting the energy storage module 4, thereby avoiding overheating, capacity decay or even explosion; and can also extend the service life of the energy storage module 4 by limiting abnormal current / voltage.

[0078] The power protection circuit 22 forms a buffer isolation between the power management module 2 and the energy storage module 4, reducing the impact of voltage fluctuations on the sensitive power management chip. Together with the power management module 2, it realizes a multi-level protection mechanism such as overcurrent, overvoltage, and short circuit layered triggering, improving the reliability of fault response.

[0079] For example, the power protection circuit 22 may include one or more of the following: a fuse, an NTC thermistor, a varistor, and a relay inter-energy storage buffer capacitor.

[0080] Of course, there are no restrictions on the specific composition of the power protection circuit 22.

[0081] Furthermore, the power protection circuit 22 includes one or any combination of overvoltage protection, overcurrent protection, short circuit protection, and reverse polarity protection.

[0082] Understandably, by integrating overvoltage, overcurrent, short circuit and reverse polarity protection, multi-dimensional protection of the energy storage module 4 can be achieved, which can avoid equipment damage caused by abnormal voltage, current surge or polarity error to a certain extent, and significantly improve system safety and lifespan.

[0083] Specifically, in some embodiments of this application, the overvoltage protection section, used to prevent excessively high input voltage from burning out subsequent circuits, includes: a Zener diode of model MMSZ5245B, which conducts when the voltage exceeds a threshold, triggering the protection action; a MOSFET switch of model AO3400, which, together with a voltage divider resistor network, cuts off the overvoltage path; and a varistor of model TVR14471M, which absorbs high-voltage pulses.

[0084] The overcurrent protection section is used to limit abnormally large currents and prevent the circuit from overheating or the components from burning out. It includes: a glass tube F1 fuse for melting and switching the circuit; an MF72 series NTC thermistor for suppressing startup surge current; and an LM358 current sensing resistor for detecting overcurrent signals and triggering MOSFET turn-off.

[0085] The short-circuit protection section is used to quickly respond to load short circuits and prevent the energy storage module 4 from discharging instantaneously and causing danger. It includes: a transistor control circuit of model SK100B PNP+BC547B NPN, which is triggered to turn off by current detection; and a 1812L series self-resetting fuse, which is used to prevent the resistance from increasing suddenly when the short circuit occurs and automatically resets after the fault is cleared.

[0086] The reverse polarity protection section is used to prevent reverse breakdown of the device caused by reversing the positive and negative terminals of the power supply. It includes a Schottky diode of model 1N5819, which is connected in series in the input path and is reverse cut off; and a PMOS IRF4905 MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), which uses the body diode to control the gate to achieve low-loss isolation.

[0087] Furthermore, such as Figure 3 As shown, the wired charging module 11 includes: an interface, a cross-point logic chip, an overvoltage protector, a buck converter, an input filter circuit, and an output filter circuit;

[0088] Specifically, the cross-point logic chip is a CC logic chip, and the overvoltage protector is a TVS diode.

[0089] One end of the CC logic chip is connected to the interface, and the other end is connected to the main control module. The main control module is connected to the power management module 2. The input end of the buck converter is connected to the interface through the input filter circuit, and the output end is connected to the power management module 2 through the output filter circuit.

[0090] The interface is grounded, and a TVS diode is connected in parallel between the power bus and ground of the interface. A fuse is connected in series between the input filter circuit and the buck converter.

[0091] Specifically, the fuse is a PTC fuse.

[0092] For example, the interface type can be a USB Type-C interface, such as USB-TYPE-C-018, which supports bidirectional power supply and high-speed data transmission for physically connecting the charger and the device to be charged;

[0093] The CC logic chip is used to manage the power supply protocol of USB Type-C. It can be the MPS HR1211 multi-mode chip that integrates PFC and LLC control and supports high power density design. Alternatively, it can be the CYPD3174 chip, which is dedicated to the control of USB PD fast charging protocol to support multi-port power distribution.

[0094] TVS diodes (transient voltage suppressors) are used to protect against electrostatic discharge (ESD) and surges, protecting downstream circuits. The models used can be PESD5V0S1BA-N, SMBJ15CA, or GESD3Z8.0C.

[0095] A step-down converter is used to reduce the input voltage (e.g., 5V / 9V) to the voltage required by the watch battery (e.g., 3.3V / 4.2V). Specific models used can be LM2596, TPS62130 or INN650DA260A.

[0096] The input filter circuit can be equipped with a safety X2 capacitor or a common-mode inductor, and the output filter circuit can be equipped with a solid-state capacitor or a ceramic capacitor.

[0097] The PTC fuse model can be 1812L200THPR;

[0098] Of course, there are no restrictions on the specific models of the interface, CC logic chip, TVS diode, buck converter, input filter circuit, output filter circuit, TVS diode, buck converter and PTC fuse, as long as they meet the usage requirements of the wired charging module 11.

[0099] Understandably, the above circuit design, through the combination of a grounding system, TVS diodes, and PTC fuses, achieves triple protection, significantly improving circuit safety. The grounding system conducts leakage current to prevent electric shock and protects electronic equipment from electrostatic or electromagnetic interference. The TVS diodes, connected in parallel between the power bus and ground, quickly suppress transient overvoltages, directing abnormal voltages to ground and protecting subsequent circuit components. The PTC fuse, when the circuit current abnormally increases, causes a sharp rise in its resistance, limiting current flow and preventing equipment damage due to overload or short circuit. Furthermore, after the fault is cleared, the PTC fuse automatically returns to a low-resistance state, eliminating the need for replacement and reducing maintenance costs.

[0100] Furthermore, such as Figure 4 As shown, the wireless charging module 12 includes: a receiving coil, a rectifier, a filter, a boost converter, and a load switch;

[0101] The input terminal of the rectifier is connected to the receiving coil, the output terminal of the rectifier is connected to the filter, the filter is connected to the boost converter, and the boost converter is connected to the power management module 2 through the load switch.

[0102] For example, the receiving coil is used to receive the electromagnetic energy transmitted by the transmitting end through the principle of electromagnetic induction and convert it into an alternating current signal;

[0103] The rectifier is used to convert the AC power output from the receiving coil into DC power for use in subsequent circuits. For example, a full-bridge rectifier circuit or an integrated rectifier chip can be used. The chip can be the semiconductor NU1009A chip, which has a built-in full-bridge MOSFET and supports high-efficiency rectification and power control; or the CPS4038 chip, which integrates a synchronous rectifier and supports bidirectional wireless charging.

[0104] The filter is used to smooth the rectified DC power, filter out high-frequency ripple and noise, and stabilize the voltage. Specifically, solid capacitors (16V 82μF) and film capacitors (0.4μF) can be used for filtering and resonance, or NPO resonant capacitors can be used to optimize the high-frequency filtering effect.

[0105] A boost converter is used to boost the rectified voltage to a suitable value according to the battery charging requirements. The boost converter can be a TPS61178 boost converter or a MAX77831 synchronous buck-boost chip.

[0106] Load switches are used to control the on / off state of circuits, prevent overcurrent or short circuits, and protect downstream components. Specifically, TPS25940L electronic fuses or G16P03 PMOS transistors can be used.

[0107] Of course, there are no restrictions on the specific models of the receiving coil, rectifier, filter, boost converter and load switch, as long as they meet the usage requirements of the wireless charging module 12.

[0108] Furthermore, such as Figure 5 As shown, the solar charging module 13 includes: a solar panel unit, an MPPT controller, a step-down converter, an energy storage buffer capacitor, and a light sensor;

[0109] The input terminal of the MPPT controller is connected to the solar panel unit, and the output terminal is connected to the step-down converter. The step-down converter is connected to the power management module 2.

[0110] One end of the energy storage buffer capacitor is connected to the output of the MPPT controller, and the other end is connected to the input of the buck converter;

[0111] The light sensor is connected to the solar panel unit and the power management module 2 respectively.

[0112] Specifically, in some embodiments of this application, the solar panel unit is used to convert light energy into electrical energy to power the battery. Its output voltage and current are affected by the light intensity and need to be used in conjunction with the MPPT controller to achieve efficient energy capture.

[0113] The MPPT controller is used to track the maximum power point of the solar panel unit in real time. By adjusting the load impedance or duty cycle, it ensures that the system is always charged with high efficiency. The chip of the MPPT controller can be a miniature MPPT chip with model number BQ25504.

[0114] A buck converter is used to convert the higher voltage (e.g., 5V-12V) output from the solar panel unit into a lower voltage (e.g., 1.8V-3.3V) suitable for watch circuits, while stabilizing the power supply voltage to prevent fluctuations from damaging sensitive components. Buck converters can use high-efficiency synchronous buck chips, such as the TPS62740 (input voltage 2.5V-6V, output current 50mA-300mA, efficiency up to 95%), which are suitable for low-power wearable devices.

[0115] Energy storage buffer capacitors are used to provide short-term energy buffering and smooth voltage fluctuations when there is insufficient light or instantaneous load changes. Surface mount ceramic capacitors can be used.

[0116] The light sensor is used to detect ambient light intensity. The model number of the light sensor is VEML7700.

[0117] Of course, there are no restrictions on the specific models and composition of the MPPT controller, buck converter, energy storage buffer capacitor and light sensor, as long as they meet the usage requirements of the solar charging module 13.

[0118] Furthermore, such as Figure 2As shown, it also includes a status feedback module 6, which is connected to the input detection module 3 to indicate the power input status of each charging module 1.

[0119] For example, the status feedback module 6 can be implemented by LED indicator lights, with different colors corresponding to different charging modes; it can also be implemented by OLED / LCD screen to display detailed parameters, such as voltage and current.

[0120] Understandably, a status feedback module 6 is provided to realize the real-time status indication function. The input status (such as voltage, current, connection status, etc.) of each charging module 1 (specifically including wired charging module 11, wireless charging module 12 and solar charging module 13) is fed back through LED indicators and display screen, which helps users understand the current power source and health status.

[0121] This application also provides a watch with multiple charging modes, including a charging circuit with multiple charging modes according to any one of the first parts.

[0122] Furthermore, combined Figure 2 and Figure 6 As shown, it also includes dial 7 and strap 8;

[0123] The interface 71 of the wired charging module 11 is located on the side wall of the dial 7, and the part for connecting an external charger is exposed in the housing of the dial 7. The receiving coil 81 of the wireless charging module 12 is located in the strap 8. The solar panel unit 72 of the solar charging module 13 is located on the outer surface of the dial 7 and is arranged along the circumferential direction of the dial 7.

[0124] Among them, receiving coil 81 is a flexible receiving coil;

[0125] Understandably, the wired charging module 11's interface 71 is located on the side wall of the dial 7, which can, to a certain extent, prevent external environmental damage to the charging interface 71, making it difficult for dust, sweat, or moisture to enter the interface 71, thus enhancing the service life of the interface 71; and only the part of the interface 71 used to connect to the external charger is exposed on the casing of the dial 7, making the watch appearance more concise and beautiful, and improving the watch's aesthetics.

[0126] The wireless charging module 12 is placed inside the watch band 8. Simply place the watch on the wireless charging pad to charge it, which improves the convenience of charging, reduces the use of connecting wires, and avoids wear and tear caused by external contact. The wireless charging module 12 is hidden in the watch band 8, so it does not affect the appearance of the watch and makes the watch look more concise and neat.

[0127] The solar panel unit 72 of the solar charging module 13 is set on the outer surface of the dial 7 and is arranged along the circumferential direction of the dial 7. It can absorb energy from sunlight or indoor light sources to the maximum extent when wearing the watch, which can improve the charging efficiency of solar energy and continuously charge the battery while wearing the watch.

[0128] The embodiments of this application have at least the following beneficial effects:

[0129] This application provides a charging circuit and watch with multiple charging modes, enriching the charging modes, providing strong battery life, and enabling reasonable detection and management of the charging circuit, thus enhancing safety performance. Specifically, it includes multiple different charging modules 1 to meet the charging needs of different charging modes, effectively extending battery life. An input detection module 3 is included to detect the charging status of each charging module 1. When one charging module 1 overheats, it can intelligently switch to other charging modules 1, avoiding conflicts between different charging modules 1 to a certain extent. While achieving continuous charging, it also reduces safety hazards, thereby enhancing safety performance.

[0130] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application.

[0131] Those skilled in the art will understand that the modules in the apparatus of the implementation scenario can be distributed within the apparatus of the implementation scenario as described, or they can be located in one or more apparatuses different from this implementation scenario, with corresponding changes. The modules of the above-described implementation scenario can be combined into one module, or they can be further divided into multiple sub-modules.

[0132] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of the implementation scenario.

[0133] The above disclosures are only a few specific implementation scenarios of this application. However, this application is not limited to these. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A charging circuit with multiple charging modes, characterized in that, include: Multiple charging modules, power management modules, energy storage modules, functional modules, and input detection modules; Each of the charging modules is connected to the power management module, the power management module is connected to the energy storage module, and the energy storage module is connected to the functional module for distributing the use of electrical energy. The charging module includes any and multiple of wired charging modules, wireless charging modules, and solar charging modules; the input detection module is connected to each of the charging modules respectively to detect the power input status of each of the charging modules. The power management module is connected to the input detection module to obtain the power input status detected by the input detection module and to control the connection and disconnection of each charging module.

2. The charging circuit with multiple charging modes according to claim 1, characterized in that, It also includes a power path switching module; One end of the power path switching module is connected to each of the charging modules, and the other end is connected to the power management module.

3. The charging circuit with multiple charging modes according to claim 1, characterized in that, It also includes a power protection circuit, one end of which is connected to the power management module and the other end of which is connected to the energy storage module.

4. The charging circuit with multiple charging modes according to claim 3, characterized in that, The power protection circuit includes one or any combination of overvoltage protection, overcurrent protection, short circuit protection, and reverse polarity protection.

5. A charging circuit with multiple charging modes according to claim 1, characterized in that, The wired charging module includes: an interface, a cross-point logic chip, an overvoltage protector, a buck converter, an input filter circuit, and an output filter circuit; One end of the cross-point logic chip is connected to the interface, and the other end is connected to the main control module. The main control module is connected to the power management module. The input terminal of the buck converter is connected to the interface through the input filter circuit, and the output terminal is connected to the power management module through the output filter circuit. The interface is grounded, the overvoltage protector is connected in parallel between the power bus and the ground wire of the interface, and the input filter circuit is connected in series with the buck converter.

6. The charging circuit with multiple charging modes according to claim 1, characterized in that, The wireless charging module includes: a receiving coil, a rectifier, a filter, a boost converter, and a load switch; The input terminal of the rectifier is connected to the receiving coil, the output terminal of the rectifier is connected to the filter, the filter is connected to the boost converter, and the boost converter is connected to the power management module through the load switch.

7. A charging circuit with multiple charging modes according to claim 1, characterized in that, The solar charging module includes: a solar panel unit, an MPPT controller, a step-down converter, an energy storage buffer capacitor, and a light sensor; The input terminal of the MPPT controller is connected to the solar panel unit, and the output terminal is connected to the buck converter, which is connected to the power management module. One end of the energy storage buffer capacitor is connected to the output terminal of the MPPT controller, and the other end is connected to the input terminal of the buck converter; The light sensor is connected to both the solar panel unit and the power management module.

8. A charging circuit with multiple charging modes according to claim 1, characterized in that, It also includes a status feedback module, which is connected to the input detection module and is used to indicate the power input status of each of the charging modules.

9. A watch with multiple charging modes, characterized in that, The charging circuit includes a multi-charging mode as described in any one of claims 1 to 8.

10. A watch with multiple charging modes according to claim 9, characterized in that, It also includes the dial and strap; The interface of the wired charging module is located on the side wall of the dial, the receiving coil of the wireless charging module is located in the strap, and the solar panel unit of the solar charging module is located on the outer surface of the dial and is arranged along the circumferential direction of the dial.

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