Universal serial bus (USB) bidirectional power supply device for generator

By designing a USB bidirectional power supply device for generators, and using circuits such as rectifier sampling circuits, chip control circuits and other circuits to achieve bidirectional power supply between the generator battery and the USB-C interface, the problem that USB devices cannot be bidirectional power supply in the prior art is solved, and the flexibility and convenience of the equipment are improved.

CN222547202UActive Publication Date: 2025-02-28SHAOXING KAIYUAN ELECTROMECHANICAL TECH CO LTD
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Patent Information

Application Number
CN202420405164.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-04
Publication Date
2025-02-28
Estimated Expiration
2034-03-04

AI Technical Summary

Technical Problem

Existing generator USB devices cannot power the generator battery through the USB interface and lack bidirectional power supply capabilities.

Method used

A USB bidirectional power supply device for generators is designed, including a rectifier sampling circuit, a chip control circuit, a constant voltage and constant current control circuit, a synchronous step-up circuit and a USB-C interface. These circuits are used to realize the bidirectional power supply between the generator battery and the USB-C interface.

Benefits of technology

It realizes two-way power supply of the USB-C interface, which can power the generator battery through the USB-C interface, and can also supply power to the USB-C interface, making it used for charging mobile phones, improving the flexibility and convenience of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a USB bidirectional power supply device for a generator, and belongs to the technical field of generator USB power supply. The circuit comprises a rectification sampling circuit, a chip control circuit, a constant-voltage and constant-current control circuit, a synchronous boost-buck circuit and a USB-C interface, the chip control circuit is respectively connected with the rectification sampling circuit, the synchronous boost-buck circuit and the USB-C interface, and the synchronous boost-buck circuit is respectively connected with the constant-voltage and constant-current control circuit and the USB-C interface. According to the utility model, bidirectional power supply of the USB-C interface can be realized, and when the generator does not operate, the USB-C interface can be externally connected with a power adapter to supply power to a generator storage battery; when the generator operates, power can be supplied to the generator storage battery and the USB-C interface, so that the USB-C interface charges the mobile phone. By arranging the protection circuit, it is ensured that external voltage cannot be injected from the C end of the USB-C interface under the condition that the VBUS is closed, and therefore it is ensured that the whole circuit structure is safe and reliable.
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Description

Technical Field

[0001] The utility model belongs to the technical field of USB power supply for generators, and specifically relates to a USB bidirectional power supply device for generators. Background Art

[0002] Currently on the market, USB devices used on generators generally power the generators, using a circuit structure that uses a USB interface to charge mobile phones, and cannot power the generator battery via an adapter via the USB interface.

[0003] Therefore, it is necessary to propose a new solution to solve the above problems. Summary of the invention

[0004] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a USB bidirectional power supply device for a generator.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions: A USB bidirectional power supply device for a generator, comprising a rectifier sampling circuit, a chip control circuit, a constant voltage and constant current control circuit, a synchronous buck-boost circuit, and a USB-C interface, wherein the chip control circuit is respectively connected to the rectifier sampling circuit, the synchronous buck-boost circuit and the USB-C interface, and the synchronous buck-boost circuit is respectively connected to the constant voltage and constant current control circuit and the USB-C interface;

[0006] The rectification sampling circuit is used to rectify the alternating current of the generator DC winding and output direct current to supply power to the chip control circuit;

[0007] The chip control circuit is used to supply power to the generator battery and the USB-C interface respectively through a constant voltage and constant current control circuit and a synchronous buck-boost circuit for the direct current rectified by the rectification sampling circuit according to the working state of the generator collected by the resistance voltage divider sampling circuit in the rectification sampling circuit, and to supply power to the generator battery through a constant voltage and constant current control circuit and a synchronous buck-boost circuit for the direct current input from the USB-C interface.

[0008] Preferably, the resistor voltage-divider sampling circuit is connected to the output end of the rectifier sampling circuit, and includes a first resistor voltage-divider sampling circuit, a second resistor voltage-divider sampling circuit, and a diode D1, wherein the first resistor voltage-divider sampling circuit and the second resistor voltage-divider sampling circuit are respectively connected to the positive and negative electrodes of the diode D1.

[0009] Preferably, the first resistor voltage-dividing sampling circuit comprises a resistor R2 and a resistor R5, the resistor R2 and the resistor R5 are connected in series to the output end of the rectifier sampling circuit, and the common connection end of the resistor R2 and the resistor R5 is connected to the chip control circuit.

[0010] Preferably, the second resistor voltage-dividing sampling circuit comprises a resistor R1 and a resistor R6, which are connected in series to the output end of the rectifier sampling circuit, and a common connection end of the resistor R1 and the resistor R6 is connected to the chip control circuit.

[0011] Preferably, the resistor voltage-dividing sampling circuit further includes a capacitor C3 and a capacitor C4 for filtering noise interference, the capacitor C3 is connected in parallel to the first resistor voltage-dividing sampling circuit, and the capacitor C4 is connected in parallel to the second resistor voltage-dividing sampling circuit.

[0012] Preferably, the chip control circuit includes a chip MCU and a voltage sampling circuit connected to the chip MCU, and the voltage sampling circuit is connected to the USB-C interface.

[0013] Preferably, the voltage sampling circuit includes a resistor R4, a resistor R8 and a capacitor C5, one end of the resistor R4 is connected to the USB-C interface, the other end of the resistor R4 is connected to one end of the resistor R8, and their common connection ends are respectively connected to the chip MCU and one end of the capacitor C5, and the other end of the resistor R8 and the other end of the capacitor C5 are grounded.

[0014] Preferably, a protection circuit is connected in series between the synchronous buck-boost circuit and the USB-C interface, and the protection circuit includes a MOS tube Q1, a MOS tube Q2 and a resistor R3, the drain of the MOS tube Q1 is connected to the USB power supply output end of the synchronous buck-boost circuit, the source of the MOS tube Q1 is respectively connected to one end of the resistor R3 and the source of the MOS tube Q2, the drain of the MOS tube Q2 is connected to the C end of the USB-C interface, and the gate of the MOS tube Q1, the gate of the MOS tube Q2 and the other end of the resistor R3 are connected to the chip control circuit.

[0015] The utility model has the beneficial effects that the utility model can realize the bidirectional power supply of the USB-C interface. When the generator is not running, the generator battery can be powered by the USB-C interface external power adapter; when the generator is running, the generator battery and the USB-C interface can be powered, so that the USB-C interface can charge the mobile phone. The utility model sets a protection circuit to ensure that when VBUS is turned off, the external voltage cannot be injected from the C end of the USB-C interface, thereby ensuring the safety and reliability of the entire circuit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a circuit structure schematic diagram.

[0017] In the figure: 1. Rectification sampling circuit; 2. Chip control circuit; 3. Constant voltage and constant current control circuit; 4. Synchronous buck-boost circuit; 5. USB-C interface. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0019] Embodiment: A USB bidirectional power supply device for a generator, such as Figure 1 As shown, it includes a rectification sampling circuit 1, a chip control circuit 2, a constant voltage and constant current control circuit 3, a synchronous buck-boost circuit 4, and a USB-C interface 5. The chip control circuit 2 is respectively connected to the rectification sampling circuit 1, the synchronous buck-boost circuit 4 and the USB-C interface 5, and the synchronous buck-boost circuit 4 is respectively connected to the constant voltage and constant current control circuit 3 and the USB-C interface 5.

[0020] Among them, the rectification sampling circuit 1 is connected to the DC winding of the generator through its input end, rectifies the AC power of the DC winding of the generator and outputs DC power to power the chip control circuit 2; the chip control circuit 2 is used to supply power to the generator battery and the USB-C interface 5 respectively through the constant voltage and constant current control circuit 3 and the synchronous buck-boost circuit 4 for the DC power rectified by the rectification sampling circuit 1 according to the working state of the generator collected by the resistance voltage divider sampling circuit in the rectification sampling circuit 1, and supplies power to the generator battery and the USB-C interface 5 through the constant voltage and constant current control circuit 3 and the synchronous buck-boost circuit 4 for the DC power input from the USB-C interface 5.

[0021] Furthermore, the rectifier sampling circuit 1 includes a rectifier bridge DA1, a capacitor C1, a capacitor C2, and a resistor voltage divider sampling circuit. The input end of the rectifier bridge DA1 is used to connect the DC winding of the generator, and the output end of the rectifier bridge DA1 serves as the output end of the rectifier sampling circuit 1. The rectifier bridge DA1 is used to rectify the AC power of the DC winding of the generator and output DC power. The capacitor C1 and the capacitor C2 are filter capacitors, which are connected in parallel to the output end of the rectifier bridge DA1.

[0022] The resistor voltage-dividing sampling circuit is connected to the output end of the rectifier sampling circuit 1, and includes a first resistor voltage-dividing sampling circuit, a second resistor voltage-dividing sampling circuit, and a diode D1. The diode D1 is connected in series to the positive output end of the rectifier sampling circuit 1. The first resistor voltage-dividing sampling circuit and the second resistor voltage-dividing sampling circuit are connected to the positive and negative electrodes of the diode D1, respectively, that is, one end of the first resistor voltage-dividing sampling circuit is connected to the positive output end of the rectifier sampling circuit 1 (the positive electrode of the diode D1), and the other end is connected to the negative output end of the rectifier sampling circuit 1. One end of the second resistor voltage-dividing sampling circuit is connected to the positive output end of the rectifier sampling circuit 1 (the negative electrode of the diode D1), and the other end is connected to the negative output end of the rectifier sampling circuit 1. The diode D1 has a unidirectional cutoff function, and in combination with the first resistor voltage-dividing sampling circuit and the second resistor voltage-dividing sampling circuit, it can effectively determine whether the generator is running or not, and at the same time, by connecting to the chip control circuit 2, the collected generator working state signal is transmitted to the chip MCU of the chip control circuit 2.

[0023] Among them, the first resistor voltage divider sampling circuit includes a resistor R2 and a resistor R5, which are connected in series to the output end of the rectifier sampling circuit 1, that is, one end of the resistor R2 is connected to the positive electrode of the diode D1, the other end of the resistor R2 is connected to one end of the resistor R5, the other end of the resistor R5 is grounded, and the common connection end of the resistor R2 and the resistor R5 is connected to the chip MCU in the chip control circuit 2.

[0024] The second resistor voltage-dividing sampling circuit includes a resistor R1 and a resistor R6, which are connected in series to the output end of the rectifier sampling circuit 1, that is, one end of the resistor R1 is connected to the cathode of the diode D1, the other end of the resistor R1 is connected to one end of the resistor R6, the other end of the resistor R6 is grounded, and the common connection end of the resistor R1 and the resistor R6 is connected to the chip MCU in the chip control circuit 2.

[0025] Preferably, the resistor voltage divider sampling circuit also includes capacitors C3 and C4 for filtering out noise interference. Capacitors C3 and C4 are ceramic capacitors. Capacitor C3 is connected in parallel to the first resistor voltage divider sampling circuit, and capacitor C4 is connected in parallel to the second resistor voltage divider sampling circuit, that is, capacitors C3 and C4 are respectively connected in parallel at the pins of the chip MCU.

[0026] like Figure 1 As shown, the constant voltage and constant current control circuit 3 and the synchronous buck-boost circuit 4 are conventional circuits in the prior art and will not be described in detail here; wherein, the output end of the constant voltage and constant current control circuit 3 is connected to the generator battery, and the USB power supply output end VBUS of the synchronous buck-boost circuit 4 is connected to the USB-C interface 5.

[0027] Furthermore, the chip control circuit 2 includes a chip MCU and a voltage sampling circuit connected to the chip MCU, and the voltage sampling circuit is connected to the USB-C interface 5 .

[0028] The voltage sampling circuit includes a resistor R4, a resistor R8 and a capacitor C5, one end of the resistor R4 is connected to the USB-C interface 5, the other end of the resistor R4 is connected to one end of the resistor R8, and the common connection end thereof is respectively connected to the chip MCU and one end of the capacitor C5, and the other end of the resistor R8 and the other end of the capacitor C5 are grounded. By setting the voltage sampling circuit, the chip MCU can sample the voltage at the C end of the USB-C interface 5.

[0029] When the generator is not running, the chip MCU collects the generator shutdown signal, and then uses the USB-C interface 5 to connect an external power adapter to supply external DC power to the generator battery through the synchronous buck-boost circuit 4 and the constant voltage and constant current control circuit 3 to charge the generator battery; when the generator is running, the chip MCU collects the generator operation signal, and then supplies the DC power rectified by the rectifier sampling circuit 1 to the generator battery through the constant voltage and constant current control circuit 3 to charge the generator battery, and at the same time supplies power to the USB-C interface 5 through the synchronous buck-boost circuit 4 to charge the mobile phone connected to the USB-C interface 5.

[0030] Preferably, a protection circuit is connected in series between the synchronous buck-boost circuit 4 and the USB-C interface 5, and the protection circuit includes a MOS tube Q1, a MOS tube Q2 and a resistor R3, the drain of the MOS tube Q1 is connected to the USB power supply output terminal VBUS of the synchronous buck-boost circuit 4, the source of the MOS tube Q1 is connected to one end of the resistor R3 and the source of the MOS tube Q2 respectively, the drain of the MOS tube Q2 is connected to the C end of the USB-C interface 5, and the gate of the MOS tube Q1, the gate of the MOS tube Q2 and the other end of the resistor R3 are connected to the chip MCU. By setting the protection circuit, the MOS tube Q1 and the MOS tube Q2 form a pair of tubes to ensure that when VBUS is turned off, the external voltage cannot be injected from the C end of the USB-C interface 5, thereby ensuring the safety and reliability of the entire circuit structure.

[0031] Finally, it should be pointed out that the above embodiments are only representative examples of the present utility model. Obviously, the present utility model is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model should be considered to belong to the protection scope of the present utility model.

Claims

1. A USB bidirectional power supply device for a generator, comprising a rectifier sampling circuit (1), a chip control circuit (2), a constant voltage and constant current control circuit (3), a synchronous buck-boost circuit (4), and a USB-C interface (5), characterized in that: The chip control circuit (2) is respectively connected to the rectification sampling circuit (1), the synchronous buck-boost circuit (4) and the USB-C interface (5); and the synchronous buck-boost circuit (4) is respectively connected to the constant voltage and constant current control circuit (3) and the USB-C interface (5); The rectification sampling circuit (1) is used to rectify the alternating current of the generator DC winding and output direct current to supply power to the chip control circuit (2); The chip control circuit (2) is used to supply power to the generator battery and the USB-C interface (5) respectively through a constant voltage and constant current control circuit (3) and a synchronous buck-boost circuit (4) based on the generator working state collected by the resistor voltage-dividing sampling circuit in the rectification sampling circuit (1), and to supply power to the generator battery through the constant voltage and constant current control circuit (3) and the synchronous buck-boost circuit (4) input from the USB-C interface (5).

2. A USB bidirectional power supply device for a generator according to claim 1, characterized in that: The resistor voltage-dividing sampling circuit is connected to the output end of the rectifier sampling circuit (1), and comprises a first resistor voltage-dividing sampling circuit, a second resistor voltage-dividing sampling circuit, and a diode D1, wherein the first resistor voltage-dividing sampling circuit and the second resistor voltage-dividing sampling circuit are respectively connected to the positive electrode and the negative electrode of the diode D1.

3. A USB bidirectional power supply device for a generator according to claim 2, characterized in that: The first resistor voltage-dividing sampling circuit comprises a resistor R2 and a resistor R5, wherein the resistor R2 and the resistor R5 are connected in series to the output end of the rectifier sampling circuit (1), and the common connection end of the resistor R2 and the resistor R5 is connected to the chip control circuit (2).

4. A USB bidirectional power supply device for a generator according to claim 2, characterized in that: The second resistor voltage-dividing sampling circuit comprises a resistor R1 and a resistor R6, wherein the resistor R1 and the resistor R6 are connected in series to the output end of the rectifier sampling circuit (1), and the common connection end of the resistor R1 and the resistor R6 is connected to the chip control circuit (2).

5. A USB bidirectional power supply device for a generator according to claim 2, characterized in that: The resistor voltage-dividing sampling circuit further includes a capacitor C3 and a capacitor C4 for filtering noise interference. The capacitor C3 is connected in parallel to the first resistor voltage-dividing sampling circuit, and the capacitor C4 is connected in parallel to the second resistor voltage-dividing sampling circuit.

6. A USB bidirectional power supply device for a generator according to claim 1, characterized in that: The chip control circuit (2) comprises a chip MCU and a voltage sampling circuit connected to the chip MCU, and the voltage sampling circuit is connected to the USB-C interface (5).

7. A USB bidirectional power supply device for a generator according to claim 6, characterized in that: The voltage sampling circuit comprises a resistor R4, a resistor R8 and a capacitor C5, one end of the resistor R4 is connected to the USB-C interface (5), the other end of the resistor R4 is connected to one end of the resistor R8, and their common connection ends are respectively connected to the chip MCU and one end of the capacitor C5, and the other end of the resistor R8 and the other end of the capacitor C5 are grounded.

8. A USB bidirectional power supply device for a generator according to claim 1, characterized in that: A protection circuit is connected in series between the synchronous buck-boost circuit (4) and the USB-C interface (5), the protection circuit comprising a MOS tube Q1, a MOS tube Q2 and a resistor R3, the drain of the MOS tube Q1 being connected to the USB power supply output end of the synchronous buck-boost circuit (4), the source of the MOS tube Q1 being connected to one end of the resistor R3 and the source of the MOS tube Q2 respectively, the drain of the MOS tube Q2 being connected to the C end of the USB-C interface (5), and the gate of the MOS tube Q1, the gate of the MOS tube Q2 and the other end of the resistor R3 being connected to the chip control circuit (2).