A three-in-one wireless charging device

Abstract

The utility model discloses a three in one wireless charging device passes through setting power input module, main control module, voltage regulation module and resonance module, and the working frequency of decoding circuit receiving resonance module inductive equipment to be charged is received and demodulated as charging signal, and main control module controls decoding circuit and step up and step down circuit to output the wireless charging electric energy corresponding to charging signal to resonance module, and resonance module can receive the working frequency of cell -phone, earphone and watch and provide wireless charging correspondingly, and three in one wireless charging device can provide QC charging or PD charging mode, and power distribution module can provide maximum charging power, and three in one wireless charging device adopts single coil, reduces the manufacturing cost of wireless charging device, also improves product portability, also has promoted the use experience of three in one wireless charging device.

Description

Technical Field

[0001] This utility model belongs to the field of wireless charging technology, and in particular relates to a three-in-one wireless charging device. Background Technology

[0002] Wireless charging eliminates the need for cables to transmit power to the device, unlike traditional chargers. Charging is achieved simply by placing the device in contact with a wireless charging pad. Therefore, wireless charging can also be called inductive charging or contactless inductive charging. Common charging pads for mobile devices like phones and watches typically involve close-range contact charging. In other applications, the charging distance can be much greater. However, because phones and watches use different power reception frequencies, the charger needs to incorporate the watch's power transmission circuitry and coil. This increases manufacturing costs, adds to the charger's size and weight, and negatively impacts portability. Therefore, there is a pressing need for a three-in-one wireless charging device to address these technical challenges. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a three-in-one wireless charging device that uses a single coil to connect to mobile phones, earphones, and watches, thereby reducing the manufacturing cost of the wireless charging device and improving the user experience, thus solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a three-in-one wireless charging device, which includes a power input module, a main control module, a voltage adjustment module, and a resonant module. The power input module, the voltage adjustment module, and the resonant module are all connected to the main control module. The voltage adjustment module is connected to the power input module. The power input module is used to receive power to supply power to each module in the circuit. The voltage adjustment module includes a decoding circuit and a step-up / step-down circuit. The decoding circuit and the step-up / step-down circuit are both connected to the main control module. The resonant module and the step-up / step-down circuit are both connected to the decoding circuit. The decoding circuit and the power input module are both connected to the step-up / step-down circuit. The decoding circuit is used to receive the operating frequency of the device to be charged sensed by the resonant module and demodulate it into a charging signal. The main control module controls the decoding circuit and the buck-boost circuit to output the wireless charging power corresponding to the charging signal to the resonant module according to the charging signal.

[0005] As a preferred embodiment of the above technical solution, the three-in-one wireless charging device further includes a power distribution module. The power input module, the main control module, and the decoding circuit are all connected to the power distribution module. The power module is used to receive the power distribution command from the main control module and output the maximum charging power corresponding to the charging signal to the decoding circuit.

[0006] As a preferred embodiment of the above technical solution, the power distribution module includes a MOSFET Q4 and multiple resistors connected to the MOSFET Q4. The MOSFET Q4 is a MMDT3946.

[0007] As a preferred embodiment of the above technical solution, the main control module includes a chip U2 and a charging control unit. The power input module and the chip U2 are both connected to the charging control unit, which includes a QC charging circuit and a PD charging circuit.

[0008] As a preferred embodiment of the above technical solution, the chip U2 is model WE9027, and the power input module is a TYPE adapter.

[0009] As a preferred embodiment of the above technical solution, the chip U2 is also connected to a temperature sensing circuit and a voltage sensing circuit.

[0010] As a preferred embodiment of the above technical solution, the decoding circuit includes a MOS transistor Q3 of model NP4832, and the MOS transistor Q3 is connected in parallel with a resistor and a capacitor.

[0011] As a preferred embodiment of the above technical solution, the buck-boost circuit includes a chip U1, a DC input terminal, a first AC output terminal, and a second AC output terminal. The DC input terminal, the first AC output terminal, and the second AC output terminal are all connected to the chip U1. The DC input terminal is connected to the power input module, the first AC output terminal is connected to the MOSFET Q3, and the second AC output terminal is connected to the resonant module.

[0012] As a preferred embodiment of the above technical solution, the resonant module includes a charging input terminal and a discharging output terminal. One end of the charging input terminal is connected to the first AC output terminal, and the other end of the charging input terminal is connected to the second AC output terminal and the discharging output terminal. The charging input terminal includes multiple capacitors connected in parallel, and the discharging output terminal includes a diode, multiple resistors and capacitors connected in parallel.

[0013] As a preferred embodiment of the above technical solution, the three-in-one wireless charging device further includes an indicator circuit connected to the main control module, the indicator circuit including a resistor and an LED.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up a power input module, a main control module, a voltage adjustment module, and a resonant module, the decoding circuit receives the operating frequency of the device to be charged sensed by the resonant module and demodulates it into a charging signal. The main control module controls the decoding circuit and the buck-boost circuit to output the wireless charging power corresponding to the charging signal to the resonant module according to the charging signal. The resonant module can receive the operating frequencies of mobile phones, headphones, and watches and provide wireless charging accordingly. The three-in-one wireless charging device can provide QC charging or PD charging modes. The power distribution module can provide the maximum charging power. The three-in-one wireless charging device uses a single coil, which reduces the manufacturing cost of the wireless charging device, improves the product's portability, and enhances the user experience of the three-in-one wireless charging device. Attached Figure Description

[0015] Figure 1 This is a structural block diagram of the three-in-one wireless charging device proposed in this utility model. Figure 2 This is a circuit diagram of the power distribution module proposed in this utility model; Figure 3 This is a circuit diagram of the main control module proposed in this utility model; Figure 4 The circuit diagrams for the temperature sensing circuit and voltage sensing circuit proposed in this utility model are shown below. Figure 5 This is a circuit diagram of the decoding circuit proposed in this utility model; Figure 6 The circuit diagram is shown for the step-up / step-down circuit proposed in this utility model. Figure 7 This is a circuit diagram of the charging input terminal proposed in this utility model; Figure 8 This is a circuit diagram of the discharge output terminal proposed in this utility model; Figure 9 The circuit diagram is for the indicator circuit proposed in this utility model; Figure 10 The circuit diagram is shown for the QC charging circuit proposed in this utility model. Figure 11 This is a circuit diagram of the PD charging circuit proposed in this utility model; Figure 12 This is a circuit diagram of the power input module proposed in this utility model.

[0016] The symbols for the main components are explained below: 10-Power input module; 20-Main control module; 30-Voltage adjustment module; 31-Decoding circuit; 32-Boost / buck circuit; 33-DC input terminal; 34-First AC output terminal; 35-Second AC output terminal; 40-Resonant module; 41-Charging input terminal; 42-Discharging output terminal; 50-Power distribution module; 51-QC charging circuit; 52-PD charging circuit; 53-Temperature sensing circuit; 54-Voltage sensing circuit; 55-Indicator circuit. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] See Figure 1 This utility model provides a three-in-one wireless charging device, which includes a power input module 10, a main control module 20, a voltage adjustment module 30, and a resonant module 40. The power input module 10, the voltage adjustment module 30, and the resonant module 40 are all connected to the main control module 20. The voltage adjustment module 30 is connected to the power input module 10. The power input module 10 is used to receive power to supply power to each module in the circuit. The voltage adjustment module 30 includes a decoding circuit 31 and a step-up / step-down circuit 32. The decoding circuit 31 and the step-up / step-down circuit 32 are both connected to the main control module 20. The resonant module 40 and the step-up / step-down circuit 32 are both connected to the decoding circuit 31. The decoding circuit 31 and the power input module 10 are both connected to the step-up / step-down circuit 32. The decoding circuit 31 is used to receive the operating frequency of the device to be charged sensed by the resonant module 40 and demodulate it into a charging signal. The main control module 20 controls the decoding circuit 31 and the buck-boost circuit 32 to output the wireless charging power corresponding to the charging signal to the resonant module 40 according to the charging signal.

[0019] In this embodiment, as Figure 2 and Figure 3As shown, the three-in-one wireless charging device also includes a power distribution module 50. The power input module 10, the main control module 20, and the decoding circuit 31 are all connected to the power distribution module 50. The power module 50 is used to receive the power distribution command from the main control module 20 and output the maximum charging power corresponding to the charging signal to the decoding circuit 31. The power distribution module 50 includes a MOSFET Q4 and multiple resistors connected to the MOSFET Q4. The MOSFET Q4 is an MMDT3946. The main control module 20 includes a chip U2 and a charging control unit. The power input module 10 and the chip U2 are both connected to the charging control unit. The charging control unit includes a QC charging circuit 51 and a PD charging circuit 52. The chip U2 is a WE9027. The power input module 10 is a TYPE adapter. The chip U2 is also connected to a temperature sensing circuit 53 and a voltage sensing circuit 54. The decoding circuit 31 includes a MOSFET Q3 of model NP4832, and the MOSFET Q3 is connected to a resistor and a capacitor in parallel.

[0020] It should be noted that, as Figure 5 and Figure 6 As shown, the buck-boost circuit 32 includes a chip U1, a DC input terminal 33, a first AC output terminal 34, and a second AC output terminal 35. The DC input terminal 33, the first AC output terminal 34, and the second AC output terminal 35 are all connected to the chip U1. The DC input terminal 33 is connected to the power input module 10, the first AC output terminal 34 is connected to the MOSFET Q3, and the second AC output terminal 35 is connected to the resonant module 50. Figure 7 and Figure 8 As shown, the resonant module 50 includes a charging input terminal 41 and a discharging output terminal 42. One end of the charging input terminal 41 is connected to the first AC output terminal 34, and the other end of the charging input terminal 41 is connected to the second AC output terminal 35 and the discharging output terminal 42. The charging input terminal 41 includes multiple capacitors connected in parallel, and the discharging output terminal 42 includes a diode, multiple resistors and capacitors connected in parallel. Figure 9 As shown, the three-in-one wireless charging device also includes an indicator circuit 55 connected to the main control module 20, and the indicator circuit 55 includes a resistor and an LED.

[0021] Specifically, such as Figure 10 and Figure 12As shown, the power input module 10 includes a TYPE-C adapter, denoted as TYPE C1; the main control module 20 includes a chip U2, capacitors C30 and C31, resistor R35, and terminal P1; the QC charging circuit 51 includes resistors R1, R3, R5, R2, R4, and R7; one end of resistors R1, R3, and R5 connected in parallel is connected to pin 3 (QC D+) of chip U2, and the other end of resistors R1, R3, and R5 connected in parallel is connected to pin 6 (PWM D+) of power input module 10; one end of resistors R2 and R4 is connected to pin 7 (QC D-) of chip U2, and the other end of resistors R2 and R4 is connected to pin B7 (PWM D-) of power input module 10; one end of resistor R7 is connected to pin 18 (AFC) of chip U2, and the other end of resistor R7 is connected to pin A7 (PWM D-) of power input module 10.

[0022] The above, such as Figure 11 As shown, the PD charging circuit 52 includes resistor R8, MOSFET Q1, resistor R10, resistor R12, resistor R9, MOSFET Q2, resistor R11, and resistor R13. Resistor R8 is connected to the drain of MOSFET and pin A5 (CC1 1) of power input module 10. The gate of MOSFET Q1 is connected to resistors R10 and R12. The source of MOSFET Q1 is connected to pin 9 (CC1) of chip U2. Resistor R9 is connected to the drain of MOSFET Q2 and pin B5 (CC2 1) of power input module 10. The gate of MOSFET Q2 is connected to resistors R11 and R13. The source of MOSFET Q2 is connected to pin 20 (CC2) of chip U2.

[0023] Specifically, such as Figure 6As shown, the step-up / step-down circuit 32 includes a chip U1, a DC input terminal 33, a first AC output terminal 34, and a second AC output terminal 35. The DC input terminal 33 includes capacitors C2, C3, C4, and C5 connected together. Capacitors C2 and C3 are connected in parallel to pins 1 and 2 of chip U1, and capacitors C4 and C5 are connected in parallel to pins 2 and 3 of chip U1. The first AC output terminal 34 includes capacitor C10, resistor R6, capacitor C10, and capacitor C12. Capacitor C10 is connected to pins 10 and 11 of chip U1. Resistor R6 and capacitor C12 are connected in series and in parallel with capacitor C10 to capacitor C10 and pin 10 of chip U1. The second AC output terminal 35 includes capacitor C18, resistor R14, capacitor C22, and capacitor C24. Chip U1 is also connected to capacitors C15, C16, C17, C19, C20, C1, and C21. Pins 15 and 14 of chip U1 are connected to pins 13 (PWM1) and 12 (PWM2) of chip U2. Capacitors C15, C16, and C17 are connected in parallel to pin 7 (VDD) of chip U1. Capacitors C19, C20, and C21 are connected in parallel to pin 6 (V3V) of chip U1. Capacitor C1 is connected to pins 4 and 5 of chip U1.

[0024] The above, such as Figure 4 As shown, the temperature sensing circuit 53 includes a resistor NTC1, a capacitor C28, and a resistor R30. The resistors NTC1, C28, and R30 are connected in parallel to pin 16 (TSENSE) of chip U2. The voltage sensing circuit 54 includes a capacitor C29, a resistor R29, and a resistor R31. The capacitors C29, R29, and R31 are connected in parallel to pin 2 (VSNS) of chip U2. The reset circuit includes a resistor R33 and a capacitor C32. The resistors R33 and C32 are connected in series to pin 1 (NRST) of chip U2.

[0025] Specifically, such as Figure 2As shown, the power distribution module 50 includes resistors R16, R17, R18, R19, R21, R22, and MOSFET Q4. The decoding circuit 31 includes MOSFET Q3, resistor R15, and capacitor C33. The charging input terminal 41 includes capacitors C7, C8, C9, C11, C13, and C14 connected in parallel. One end of resistor R18 is connected to the first AC output terminal 34 and pins 1 and 3 of MOSFET Q3. The other end of resistor R18 and resistor R19 are connected to pins 2 and 4 of MOSFET Q3. Resistors R21 and R22 are connected in parallel to pin 14 of chip U2 (Coil A1). DRV), resistors R16 and R17 are connected in parallel to pin 11 (BST1) of chip U1, MOSFET Q4 includes two transistors connected in parallel; resistor R15 and capacitor C33 are connected in series to pins 5, 6, 7, and 8 of MOSFET Q3 and are connected in parallel with capacitors C8, C9, and C11 (AC1_A1) in charging input terminal 41, and capacitors C7 and C8 in charging input terminal 41 are connected in parallel to discharging output terminal 42.

[0026] The above, such as Figure 8 As shown, the discharge output terminal 42 includes diode D1, resistors R20, R23, R24, R25, R26, R27, R28, and capacitors C23, C25, C26, and C27. The anode of diode D1 is connected to capacitors C7 and C8 (AC2_Coil) in the charging input terminal 41. The cathode of diode D1 is connected to resistors R23, C25, C28, and C27. Resistor R28 and capacitor C27 are connected in parallel to pin 11 (VPEAK) of chip U2. Capacitor C25 and resistor R26 are connected in parallel to one end of resistors R23 and R24. The other end of resistor R24 ​​is connected to capacitors C23 and C26. Resistor R20 and resistor R27 are connected in parallel to pin 17 (COM1) of chip U2. The indicator circuit 55 includes a resistor R36 and a diode LED1, which are connected in parallel to pin 10 (LED1) of chip U2. The operating frequencies of the mobile phone and watch are 105kHz~205kHz and 325kHz, respectively. The input voltage of the power input module is compatible with QC and PD charging protocols, and can be 5V, 9V, or 12V. The maximum output power of the power distribution module can be 5W, 7.5W, 10W, or 15W (compatible with the watch). The effective charging distance for the mobile phone is 6mm, the horizontal clearance is ±5mm, and the charging efficiency is 80%.

[0027] It should be understood that a single-coil wireless charger consists of a single transmitting coil. It generates an alternating magnetic field through alternating current, inducing a current in the receiving coil, thus transferring energy from the transmitting end to the receiving end. Its operation is based on the principle of electromagnetic induction. When alternating current is applied to the transmitting coil, a changing magnetic field is generated around it. The receiving coil, placed within this magnetic field, generates an induced electromotive force, thereby charging the device. By setting up a power input module 10, a main control module 20, a voltage adjustment module 30, and a resonant module 40, the decoding circuit 31 receives the operating frequency of the device to be charged sensed by the resonant module 40 and demodulates it into a charging signal. The main control module 20 controls the decoding circuit 31 and the buck-boost circuit 32 to output the wireless charging power corresponding to the charging signal to the resonant module 40 based on the charging signal. The resonant module 40 can receive the operating frequencies of mobile phones, headphones, and watches and provide wireless charging accordingly. The three-in-one wireless charging device can provide QC charging or PD charging modes. The power distribution module 50 can provide the maximum charging power. The three-in-one wireless charging device uses a single coil, reducing the manufacturing cost of the wireless charging device, improving product portability, and enhancing the user experience.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A three-in-one wireless charging device, characterized in that, The three-in-one wireless charging device includes a power input module, a main control module, a voltage adjustment module, and a resonant module. The power input module, the voltage adjustment module, and the resonant module are all connected to the main control module. The voltage adjustment module is connected to the power input module. The power input module is used to receive power to supply power to each module in the circuit. The voltage adjustment module includes a decoding circuit and a step-up / step-down circuit. The decoding circuit and the step-up / step-down circuit are both connected to the main control module. The resonant module and the step-up / step-down circuit are both connected to the decoding circuit. The decoding circuit and the power input module are both connected to the step-up / step-down circuit. The decoding circuit is used to receive the operating frequency of the device to be charged sensed by the resonant module and demodulate it into a charging signal. The main control module controls the decoding circuit and the buck-boost circuit to output the wireless charging power corresponding to the charging signal to the resonant module according to the charging signal.

2. The three-in-one wireless charging device according to claim 1, characterized in that, The three-in-one wireless charging device also includes a power distribution module. The power input module, the main control module, and the decoding circuit are all connected to the power distribution module. The power distribution module is used to receive the power distribution command from the main control module and output the maximum charging power corresponding to the charging signal to the decoding circuit.

3. The three-in-one wireless charging device according to claim 2, characterized in that, The power distribution module includes a MOSFET Q4 and multiple resistors connected to the MOSFET Q4. The MOSFET Q4 is a model MMDT3946.

4. The three-in-one wireless charging device according to claim 2, characterized in that, The main control module includes a chip U2 and a charging control unit. The power input module and the chip U2 are both connected to the charging control unit, which includes a QC charging circuit and a PD charging circuit.

5. The three-in-one wireless charging device according to claim 4, characterized in that, The chip U2 is model WE9027, and the power input module is a TYPE adapter.

6. The three-in-one wireless charging device according to claim 5, characterized in that, The chip U2 is also connected to a temperature sensing circuit and a voltage sensing circuit.

7. The three-in-one wireless charging device according to claim 1, characterized in that, The decoding circuit includes a MOSFET Q3 of model NP4832, and the MOSFET Q3 is connected in parallel with a resistor and a capacitor.

8. The three-in-one wireless charging device according to claim 7, characterized in that, The buck-boost circuit includes a chip U1, a DC input terminal, a first AC output terminal, and a second AC output terminal. The DC input terminal, the first AC output terminal, and the second AC output terminal are all connected to the chip U1. The DC input terminal is connected to the power input module, the first AC output terminal is connected to the MOSFET Q3, and the second AC output terminal is connected to the resonant module.

9. The three-in-one wireless charging device according to claim 8, characterized in that, The resonant module includes a charging input terminal and a discharging output terminal. One end of the charging input terminal is connected to the first AC output terminal, and the other end of the charging input terminal is connected to the second AC output terminal and the discharging output terminal. The charging input terminal includes multiple capacitors connected in parallel, and the discharging output terminal includes a diode, multiple resistors and capacitors connected in parallel.

10. The three-in-one wireless charging device according to claim 1, characterized in that, The three-in-one wireless charging device also includes an indicator circuit connected to the main control module, the indicator circuit including a resistor and an LED.

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