Generator power supply circuit

Abstract

The utility model provides a power supply circuit of a generator. The power supply circuit comprises a first output circuit, a second output circuit, a first sampling circuit and a control unit, the first output circuit is provided with a first switch; the second output circuit is provided with a second switch, and the first output circuit and the second output circuit share and are connected with a power supply output end; the first sampling circuit samples the voltage value of the energy storage circuit; the input end of the control unit is connected with the first sampling circuit, the two output ends of the control unit are connected with the first switch and the second switch respectively, and the control unit is used for disconnecting the first switch and connecting the second switch under the condition that the voltage value of the energy storage circuit reaches a first voltage threshold value. When the voltage value of the energy storage circuit reaches a second voltage threshold value, the first switch is turned on and the second switch is turned off; switching between battery output and energy storage circuit output can be carried out according to the charging condition of the generator, and the stability of the output voltage is ensured.

Description

Technical Field

[0001] This application relates to the field of power supply circuits, and more particularly to a generator power supply circuit. Background Technology

[0002] When the generator power supply circuit is supplying power, if the generator's energy storage circuit has sufficient energy, the current output voltage can reach the target output voltage value; if the generator's energy storage circuit has insufficient energy, the current output voltage will be difficult to reach the target output voltage value, and voltage instability will occur. Utility Model Content

[0003] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0004] The purpose of this application is to at least partially solve one of the technical problems existing in the related technologies. The embodiments of this application provide a generator power supply circuit that can switch the output link according to the charging status of the generator to the energy storage circuit.

[0005] An embodiment of this application provides a generator power supply circuit, comprising:

[0006] A first output circuit, the first output circuit being used for battery output, the first output circuit being equipped with a first switch;

[0007] The second output circuit is used for energy storage circuit output. The second output circuit is equipped with a second switch. The first output circuit and the second output circuit are connected to the power supply output terminal.

[0008] The first sampling circuit is used to sample the voltage value of the energy storage circuit.

[0009] The control unit has an input terminal connected to the first sampling circuit and two output terminals connected to the first switch and the second switch, respectively. The control unit is used to disconnect the first switch and turn on the second switch when the voltage value of the energy storage circuit reaches a first voltage threshold, and to turn on the first switch and disconnect the second switch when the voltage value of the energy storage circuit reaches a second voltage threshold.

[0010] Wherein, the first voltage threshold is greater than the second voltage threshold.

[0011] In some embodiments of this application, the control unit includes a DC-to-DC power supply chip.

[0012] In some embodiments of this application, the first output circuit is provided with a first input interface for connecting to a battery, and the second output circuit is provided with a second input interface for connecting to a generator.

[0013] In some embodiments of this application, the control unit is connected to a second sampling circuit, which is used to sample the voltage value of the battery.

[0014] In some embodiments of this application, the control unit is connected to a third sampling circuit, which is used to sample the voltage value at the power supply output terminal.

[0015] In some embodiments of this application, the first output circuit is provided with a first anti-reverse charging unit, which includes a first diode and a second diode. The positive terminals of the first diode and the second diode are connected to the output terminal of the first switch, and the negative terminals of the first diode and the second diode are connected to the power supply output terminal.

[0016] In some embodiments of this application, the second output circuit is provided with a second anti-reverse charging unit, which includes a third diode and a fourth diode. The positive terminals of the third diode and the fourth diode are connected to the output terminal of the second switch, and the negative terminals of the third diode and the fourth diode are connected to the power supply output terminal.

[0017] In some embodiments of this application, an energy storage capacitor is provided between the second input interface and the second switch.

[0018] In some embodiments of this application, the power supply output terminal is provided with a buffer capacitor for buffering instantaneous discharge current.

[0019] In some embodiments of this application, the first output circuit includes a first boost unit disposed between the first input interface and the power supply output terminal; the second output circuit includes a second boost unit disposed between the second input interface and the power supply output terminal.

[0020] The above solution has at least the following beneficial effects: the generator power supply circuit can collect the voltage value of the energy storage circuit and switch between the battery output and the energy storage circuit output links according to the generator's charging status. Furthermore, it accurately switches between the battery output and the energy storage circuit output links based on the voltage value of the energy storage circuit. When the generator's energy storage is insufficient, it switches to battery output; when the generator's energy storage is sufficient, it switches to energy storage circuit output, ensuring stable output voltage. Attached Figure Description

[0021] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0022] Figure 1 This is a schematic diagram of a generator power supply circuit provided in an embodiment of this application;

[0023] Figure 2 This is a circuit diagram of the control unit provided in an embodiment of this application;

[0024] Figure 3 This is a circuit diagram of the power supply unit provided in an embodiment of this application;

[0025] Figure 4 This is a circuit diagram of the first sampling circuit provided in an embodiment of this application;

[0026] Figure 5 This is a circuit diagram of the second sampling circuit provided in an embodiment of this application;

[0027] Figure 6 This is a circuit diagram of the third sampling circuit provided in an embodiment of this application;

[0028] Figure 7 This is a circuit diagram of a first output circuit connected to multiple batteries, provided in an embodiment of this application.

[0029] Figure 8 This is a circuit diagram of a first output circuit connected to a single battery provided in an embodiment of this application;

[0030] Figure 9 This is a circuit diagram of the second output circuit provided in an embodiment of this application;

[0031] Figure 10 This is a circuit diagram of the power output terminal provided in an embodiment of this application. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, or the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0034] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0035] An embodiment of this application provides a generator power supply circuit.

[0036] Reference Figure 1 , Figure 2 The generator power supply circuit includes: a first output circuit 100, a second output circuit 200, a first sampling circuit 400, and a control unit 500.

[0037] The first output circuit 100 is used for battery output and is equipped with a first switch 101; the second output circuit 200 is used for energy storage circuit output and is equipped with a second switch 201. The first output circuit 100 and the second output circuit 200 are connected to the power supply output terminal 300; the first sampling circuit 400 is used to sample the voltage value of the energy storage circuit; the input terminal of the control unit 500 is connected to the first sampling circuit 400, and the two output terminals of the control unit 500 are respectively connected to the first switch 101 and the second switch 201. The control unit 500 is used to disconnect the first switch 101 and turn on the second switch 201 when the voltage value of the energy storage circuit reaches a first voltage threshold, and to turn on the first switch 101 and disconnect the second switch 201 when the voltage value of the energy storage circuit reaches a second voltage threshold.

[0038] It is important to note that the first voltage threshold is greater than the second voltage threshold. That is, when the voltage of the energy storage circuit rises to the first voltage threshold, the first switch 101 is disconnected, the second switch 201 is turned on, and current is output through the energy storage circuit. When the voltage of the energy storage circuit drops to the second voltage threshold, the first switch 101 is turned on, the second switch 201 is disconnected, and current is output through the battery.

[0039] In this embodiment, the generator power supply circuit can collect the voltage value of the energy storage circuit and switch between the battery output and the energy storage circuit output links according to the generator's charging status. Furthermore, it accurately switches between the two links based on the energy storage circuit's voltage value. When the generator's energy storage is insufficient, it switches to battery output; when the generator's energy storage is sufficient, it switches to energy storage circuit output, ensuring stable output voltage.

[0040] The generator power supply circuit employs multi-point voltage monitoring, comprising a first sampling circuit 400, a second sampling circuit, and a third sampling circuit. The first sampling circuit 400 samples the voltage value of the energy storage circuit; the second sampling circuit samples the voltage value of the battery; and the third sampling circuit samples the voltage value of the power supply output terminal 300.

[0041] The output terminals of the first sampling circuit 400, the second sampling circuit, and the third sampling circuit are respectively connected to three different input pins of the control unit 500.

[0042] Reference Figure 4 The first sampling circuit 400 includes resistors R3 and R4 and capacitor C8. One end of resistor R3 is connected to the power supply output terminal 300, and the other end of resistor R3 is connected to one end of resistor R4, one end of capacitor C8, and the input pin of control unit 500. The other ends of resistor R4 and capacitor C8 are grounded.

[0043] Reference Figure 5 The second sampling circuit includes resistors R7 and R8 and capacitor C15. One end of resistor R7 is connected to the power supply output terminal 300, and the other end of resistor R7 is connected to one end of resistor R8, one end of capacitor C15, and the input pin of control unit 500. The other ends of resistor R8 and capacitor C15 are grounded.

[0044] Reference Figure 6 The third sampling circuit includes resistors R1 and R2 and capacitor C4. One end of resistor R1 is connected to the power supply output terminal 300, and the other end of resistor R1 is connected to one end of resistor R2, one end of capacitor C4, and the input pin of control unit 500. The other ends of resistor R2 and capacitor C4 are grounded.

[0045] Reference Figure 8 When the first output circuit 100 is connected to a single lithium-ion battery with a discharge voltage of 3.6V / 100mA, the first output circuit 100 has a first input interface for battery connection, which is interface H2. Interface H2 is connected to the first boost unit U3, which boosts the current input from the battery. The enable terminal of the first boost unit U3 is connected to the control unit 500. When the voltage of the energy storage circuit rises to a first voltage threshold, the control unit 500 outputs a disabling signal. The disabling signal is input to the first boost unit U3 through its enable terminal, and the output terminal of the first boost unit U3 no longer outputs current. When the voltage of the energy storage circuit drops to a second voltage threshold, the control unit 500 outputs an enable signal. The enable signal is input to the first boost unit U3 through its enable terminal, and the output terminal of the first boost unit U3 outputs current, allowing the battery's energy to be output through the power supply output terminal 300.

[0046] Reference Figure 7When the first output circuit 100 is connected to multiple alkaline batteries (specifically four batteries, discharging at 6V / 1A), the first input interface of the first output circuit 100 is interface H5. One output terminal of interface H5 is connected to one end of resistor R12 and the collector of transistor Q3, while the other output terminal of interface H5 is grounded. The other end of resistor R12 is connected to the base of transistor Q3 and one end of resistor R13, the other end of resistor R13 is connected to the collector of transistor Q2, the emitter of transistor Q2 is grounded, the base of transistor Q2 is connected to one end of resistor R11, the other end of resistor R11 is connected to control unit 500, and the emitter of transistor Q3 is connected to the first reverse charging protection unit. Transistors Q2 and Q3 form a first switch 101, controlling the on / off state of the first output circuit 100.

[0047] The first output circuit 100 is provided with a first reverse charging protection unit. The first reverse charging protection unit includes a first diode and a second diode. The positive terminals of the first diode and the second diode are connected to the output terminal of the first switch 101. In this embodiment, the positive terminals of the first diode and the second diode are connected to the output terminal of the first boost unit U3; the negative terminals of the first diode and the second diode are connected to the power supply output terminal 300.

[0048] Reference Figure 9 The second output circuit 200 is provided with a second input interface H4 for connection to the generator. A second sampling circuit is connected to the output terminal of the second input interface. The second input interface H4 is connected to a second boost unit U4, which boosts the current input to the energy storage circuit. The enable terminal of the second boost unit U4 is connected to the control unit 500. When the voltage of the energy storage circuit rises to a first voltage threshold, the control unit 500 outputs an enable signal. This enable signal is input to the second boost unit U4 through its enable terminal, and the output terminal of the second boost unit U4 outputs current, allowing the energy from the energy storage circuit to be output through the power supply output terminal 300. When the voltage of the energy storage circuit drops to a second voltage threshold, the control unit 500 outputs a disabling signal. This disabling signal is input to the second boost unit U4 through its enable terminal, and the output terminal of the second boost unit U4 no longer outputs current.

[0049] The second output circuit 200 is provided with a second reverse charging protection unit. The second reverse charging protection unit includes a third diode and a fourth diode. The positive terminals of the third diode and the fourth diode are connected to the output terminal of the second switch 201. In this embodiment, the positive terminals of the third diode and the fourth diode are connected to the output terminal of the second boost unit U4; the negative terminals of the third diode and the fourth diode are connected to the power supply output terminal 300.

[0050] An energy storage capacitor C11 is installed between the second input interface and the second switch 201. The third sampling circuit is connected to one end of the energy storage capacitor C11. The generator is connected to the second input interface, which is connected to the positive terminal of diode D3. The negative terminal of diode D3 is connected to one end of the energy storage capacitor C11, and the other end of the energy storage capacitor is grounded. One end of the energy storage capacitor C11 is connected to one end of capacitor C12 and one end of capacitor C13, and one end of the energy storage capacitor C11 is connected to the second boost unit U4. The generator charges the energy storage capacitor C11, and the energy from the energy storage capacitor C11 is boosted by the second boost unit U4 before being output.

[0051] Reference Figure 10 The power output terminal 300 is equipped with a buffer capacitor C9, which can buffer the instantaneous discharge current.

[0052] Reference Figure 3 The power supply unit regulates the voltage to 2.5V through the voltage regulator chip U1, providing power and voltage sampling reference for the DC-to-DC power supply chip of the control unit 500.

[0053] The above is a detailed description of the preferred embodiments of this application, but this application is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A generator power supply circuit, characterized in that, include: A first output circuit, the first output circuit being used for battery output, the first output circuit being equipped with a first switch; The second output circuit is used for energy storage circuit output. The second output circuit is equipped with a second switch. The first output circuit and the second output circuit are connected to the power supply output terminal. The first sampling circuit is used to sample the voltage value of the energy storage circuit. The control unit has an input terminal connected to the first sampling circuit and two output terminals connected to the first switch and the second switch, respectively. The control unit is used to disconnect the first switch and turn on the second switch when the voltage value of the energy storage circuit reaches a first voltage threshold, and to turn on the first switch and disconnect the second switch when the voltage value of the energy storage circuit reaches a second voltage threshold. Wherein, the first voltage threshold is greater than the second voltage threshold.

2. The generator power supply circuit according to claim 1, characterized in that, The control unit includes a DC-to-DC power supply chip.

3. The generator power supply circuit according to claim 1, characterized in that, The first output circuit is provided with a first input interface for connecting to the battery, and the second output circuit is provided with a second input interface for connecting to the generator.

4. A generator power supply circuit according to claim 1, characterized in that, The control unit is connected to a second sampling circuit, which is used to sample the voltage value of the battery.

5. A generator power supply circuit according to claim 1, characterized in that, The control unit is connected to the third sampling circuit, which is used to sample the voltage value at the power supply output terminal.

6. A generator power supply circuit according to claim 1, characterized in that, The first output circuit is provided with a first anti-reverse charging unit, which includes a first diode and a second diode. The positive terminals of the first diode and the second diode are connected to the output terminal of the first switch, and the negative terminals of the first diode and the second diode are connected to the power supply output terminal.

7. A generator power supply circuit according to claim 1, characterized in that, The second output circuit is provided with a second anti-reverse charging unit, which includes a third diode and a fourth diode. The positive terminals of the third diode and the fourth diode are connected to the output terminal of the second switch, and the negative terminals of the third diode and the fourth diode are connected to the power supply output terminal.

8. A generator power supply circuit according to claim 3, characterized in that, An energy storage capacitor is provided between the second input interface and the second switch.

9. A generator power supply circuit according to claim 1, characterized in that, The power supply output terminal is equipped with a buffer capacitor for buffering instantaneous discharge current.

10. A generator power supply circuit according to claim 3, characterized in that, The first output circuit includes a first boost unit, which is disposed between the first input interface and the power supply output terminal; the second output circuit includes a second boost unit, which is disposed between the second input interface and the power supply output terminal.

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