One-out-of-two power supply module for unmanned aerial vehicle

Abstract

The utility model relates to the technical field of unmanned aerial vehicle power supply, in particular to an either-or power supply module for an unmanned aerial vehicle, which comprises an output end used for being connected with electric equipment of the unmanned aerial vehicle; the first input end is used for being connected with an engine power generation device; the first input end is connected with the output end, and a first switch is arranged between the first input end and the output end; the second input end is used for being connected with an airborne power supply; the second input end is connected with the output end, and a second switch is arranged between the second input end and the output end; the main controller is connected with the first switch and is used for controlling the on-off of the first switch, and the main controller is also connected with the second switch and is used for controlling the on-off of the second switch; the main controller is configured to control one of the first switch and the second switch to be switched on. According to the utility model, the main controller controls and switches the power generation device or the airborne power supply to supply power to the electric equipment of the unmanned aerial vehicle, so that the endurance time of the airborne power supply is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply for unmanned aerial vehicles, and more specifically, to a two-choice power supply module for unmanned aerial vehicles. Background Art

[0002] The electrical equipment on the drone includes the autopilot, steering gear, power motor, engine electric starter, radio and payload, etc. In order to improve the flight performance and endurance of the drone, the onboard power supply for the electrical equipment on the drone is usually a relatively light and high-energy-density lithium battery.

[0003] Therefore, the battery life of lithium batteries used in drones in the prior art is usually short. Moreover, when the SOC value of the lithium battery decreases, its output voltage may decrease. When the drone works for a long time, the lower SOC value of the lithium battery leads to a lower output voltage, which may affect the stability of the drone's electrical equipment. Utility Model Content

[0004] In order to solve the technical problems that the onboard power supply for the UAV has a short flight time and the output voltage may be unstable, the utility model proposes to selectively power the UAV's electrical equipment through the engine generator and the onboard power supply. To this end, the utility model provides solutions in the following aspects.

[0005] A two-choice power supply module for an unmanned aerial vehicle comprises: an output end for connecting to an electrical device of the unmanned aerial vehicle; a first input end for connecting to an engine power generation device; the first input end is connected to the output end, and a first switch is provided between the first input end and the output end; a second input end is used to connect to an onboard power supply; the second input end is connected to the output end, and a second switch is provided between the second input end and the output end; a main controller is connected to the first switch and used to control the on and off of the first switch, and the main controller is also connected to the second switch and used to control the on and off of the second switch; the main controller is configured to control the first switch and the second switch to selectively turn on.

[0006] In one embodiment, a two-choice power supply module for a drone also includes a first voltage detection circuit and a second voltage detection circuit; the main controller is configured to detect whether the voltage at the first input terminal is overvoltage or undervoltage through the first voltage detection circuit, and to detect whether the voltage at the second input terminal is overvoltage or undervoltage through the second voltage detection circuit; the main controller is also configured to control the first switch to disconnect when the voltage at the first input terminal is detected to be overvoltage or undervoltage, and to control the second switch to disconnect when the voltage at the second input terminal is detected to be overvoltage or undervoltage.

[0007] In one embodiment, the first voltage detection circuit includes a ninth resistor (R9), a tenth resistor (R10), an eleventh resistor (R11) and a twelfth resistor (R12) connected in sequence between the first input terminal and the ground terminal, a first undervoltage detection pin of the main controller is connected between the ninth resistor (R9) and the tenth resistor (R10), and a first overvoltage detection pin of the main controller is connected between the eleventh resistor (R11) and the twelfth resistor (R12); the second voltage detection circuit includes a fifth resistor (R5), a sixth resistor (R6), a seventh resistor (R7) and an eighth resistor (R8) connected in sequence between the second input terminal and the ground terminal, a second undervoltage detection pin of the main controller is connected between the fifth resistor (R5) and the sixth resistor (R6), and a second overvoltage detection pin of the main controller is connected between the seventh resistor (R7) and the eighth resistor (R8).

[0008] In one embodiment, a two-choice power supply module for a drone also includes a first current detection circuit and a second current detection circuit; the main controller is configured to detect whether the current provided by the first input terminal to the output terminal is overcurrent through the first current detection circuit, and detect whether the current provided by the second input terminal to the output terminal is overcurrent through the second current detection circuit; the main controller is also configured to control the first switch to be disconnected when it is detected that the current provided by the first input terminal to the output terminal is overcurrent, and control the second switch to be disconnected when it is detected that the current provided by the second input terminal to the output terminal is overcurrent.

[0009] In one embodiment, the first current detection circuit includes a second resistor (R2) connected between the first switch and the output end, and the two ends of the second resistor (R2) are respectively connected to the first current detection pin and the second current detection pin of the main controller; the second current detection circuit includes a fourth resistor (R4) connected between the second switch and the output end, and the two ends of the fourth resistor (R4) are respectively connected to the third current detection pin and the fourth current detection pin of the main controller.

[0010] In one embodiment, the first switch comprises: a first MOS tube (Q1) and a second MOS tube (Q2), wherein the drain of the first MOS tube (Q1) is connected to the first input end, the drain of the second MOS tube (Q2) is connected to the output end, the source of the first MOS tube (Q1) and the source of the second MOS tube (Q2) are both connected to a first source signal pin of the main controller, and the gate of the first MOS tube (Q1) and the gate of the second MOS tube (Q2) are both connected to a first gate signal pin of the main controller, wherein the first MOS tube (Q1) and the second MOS tube (Q2) are both P-channel M OS transistor; the second switch comprises: a third MOS transistor (Q3) and a fourth MOS transistor (Q4), the drain of the third MOS transistor (Q3) being connected to the second input end, the drain of the fourth MOS transistor (Q4) being connected to the output end, the source of the third MOS transistor (Q3) and the source of the fourth MOS transistor (Q4) being both connected to the second source signal pin of the main controller, the gate of the third MOS transistor (Q3) and the gate of the fourth MOS transistor (Q4) being both connected to the second gate signal pin of the main controller, wherein the third MOS transistor (Q3) and the fourth MOS transistor (Q4) are both P-channel MOS transistors.

[0011] In one embodiment, the main controller is a power path controller.

[0012] In one embodiment, the engine power generation device is connected to the first input end through a battery, the engine power generation device charges the battery, and the battery supplies power to the first input end.

[0013] In one embodiment, a two-choice power supply module for a drone also includes a substrate; the first input end, the second input end, the output end, the main controller, the first switch and the second switch are all arranged on the substrate and connected by metal wires embedded in the substrate.

[0014] In one embodiment, a two-choice power supply module for a drone further includes a protective shell, and a shell wall of the protective shell is provided with gaps to avoid the first input end, the second input end and the output end.

[0015] The beneficial effects of the utility model are:

[0016] The output voltage of the engine generator and the onboard power supply is collected by the main controller. When the voltage output by the engine generator is within a preset range, only the engine generator supplies power to the electrical equipment; and when the voltage output by the engine generator is not within the preset range, only the onboard power supply supplies power to the electrical equipment. Based on this, the utility model provides a stable voltage for the electrical equipment through the engine generator, so that the power loss of the onboard power supply within a certain period of time is reduced, which not only increases the time of the onboard power supply, but also improves the stability of the output voltage of the onboard power supply within a certain period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0018] Figure 1 This is a structural block diagram of a two-choice power supply module for a drone based on an embodiment of the utility model;

[0019] Figure 2 This is a circuit schematic diagram of a two-choice power supply module for a drone based on an embodiment of the utility model;

[0020] Figure 1 and Figure 2 In the figure, A, first input terminal; B, second input terminal; D, output terminal; 1-second undervoltage detection pin; 2-second overvoltage detection pin; 3-first undervoltage detection pin; 4-first overvoltage detection pin; 5-first power supply pin; 6-first gate signal pin; 7-first source signal pin; 8-second power supply pin; 9-first current detection pin; 10-second current detection pin; 11-second gate signal pin; 12-second source signal pin; 13-third current detection pin; 14-fourth current detection pin. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0022] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings.

[0023] Figure 1This is a structural block diagram of a two-choice power supply module for a drone based on an embodiment of the utility model.

[0024] like Figure 1 As shown, a two-choice power supply module for a drone comprises: an output terminal D, used to connect to an electrical device of the drone; a first input terminal A, used to connect to an engine power generation device; the first input terminal A is connected to the output terminal D, and a first switch is provided between the first input terminal A and the output terminal D; a second input terminal B, used to connect to an onboard power supply; the second input terminal B is connected to the output terminal D, and a second switch is provided between the second input terminal B and the output terminal D; a main controller is connected to the first switch, used to control the on and off of the first switch, and the main controller is also connected to the second switch, used to control the on and off of the second switch; the main controller is configured to control the first switch and the second switch to selectively turn on.

[0025] Specifically, before the engine of the drone is started, the main controller of the drone's two-choice power supply module can control the first switch to be turned on and the second switch to be turned on, so that the onboard power supply can supply power to the electrical equipment; after the engine of the drone is started, the main controller of the drone's two-choice power supply module can control the first switch to be turned on and the second switch to be turned off, so that the engine generator can supply power to the electrical equipment; during the flight of the drone, the main controller of the drone's two-choice power supply module can switch the onboard power supply or the engine generator to supply power to the electrical equipment according to the collected voltage or current.

[0026] Wherein, the engine power generation device includes an engine and a generator, and the output shaft of the engine is connected to the rotor of the generator. When the engine of the UAV is started and the output shaft of the engine rotates, the output shaft of the engine can drive the propeller to rotate to provide power for the UAV on the one hand, and can drive the rotor of the generator to rotate to generate an induced electromotive force on the other hand, that is, the generator can convert the mechanical energy provided by the engine into electrical energy (electromagnetic induction phenomenon). In one possible implementation, the electrical energy generated by the generator can be directly provided to the first input terminal A of the two-choice power supply module of the UAV; in another possible implementation, the electrical energy generated by the generator can be stored by a battery and provided by the battery to the first input terminal A of the two-choice power supply module of the UAV.

[0027] In particular, when the storage battery is in a charged state, it can supply power to electrical equipment, so the battery capacity of the storage battery does not need to be very large, and the volume and mass of the storage battery are usually small.

[0028] In one embodiment, a two-choice power supply module for a drone further includes a first voltage detection circuit and a second voltage detection circuit. The main controller is configured to detect whether the voltage at the first input terminal is overvoltage or undervoltage through the first voltage detection circuit, and detect whether the voltage at the second input terminal is overvoltage or undervoltage through the second voltage detection circuit; the main controller is also configured to control the first switch to disconnect when the voltage at the first input terminal is detected to be overvoltage or undervoltage, and control the second switch to disconnect when the voltage at the second input terminal is detected to be overvoltage or undervoltage.

[0029] Wherein, when the voltage of the first input terminal A is less than the undervoltage threshold, its output voltage is determined to be undervoltage, and when the voltage of the first input terminal A is greater than the overvoltage threshold, its output voltage is determined to be overvoltage. When the voltage of the second input terminal B is less than the undervoltage threshold, its output voltage is determined to be undervoltage, and when the voltage of the second input terminal B is greater than the overvoltage threshold, its output voltage is determined to be overvoltage. When the voltage of the first input terminal A is overvoltage or undervoltage, the main controller controls the first switch to be disconnected and controls the second switch to be turned on. When the voltage of the second input terminal B is overvoltage or undervoltage, and the voltage of the first input terminal A is not overvoltage or undervoltage, the main controller controls the first switch to be turned on and controls the second switch to be disconnected. In one embodiment, the main controller includes a comparator. The voltage of the first input terminal A is compared with the undervoltage threshold and the overvoltage threshold by the comparator, so as to determine whether the voltage of the first input terminal A is overvoltage or undervoltage; and the voltage of the second input terminal B is compared with the undervoltage threshold and the overvoltage threshold by the comparator, so as to determine whether the voltage of the second input terminal B is overvoltage or undervoltage.

[0030] In one embodiment, when the voltage of the first input terminal A is undervoltage or overvoltage, and the voltage of the second input terminal B is overvoltage, the power controller can be used to reduce the voltage of the second input terminal B. When the voltage of the first input terminal A is undervoltage or overvoltage, and the voltage of the second input terminal B is undervoltage, an alarm is given by an audible and visual alarm.

[0031] Furthermore, a two-choice power supply module for a drone also includes a substrate; the first input terminal A, the second input terminal B, the output terminal D, the main controller, the first switch and the second switch are all arranged on the substrate and connected by a metal wire embedded in the substrate. A two-choice power supply module for a drone also includes a protective shell, the shell wall of the protective shell is provided with a notch to avoid the first input terminal A, the second input terminal B and the output terminal.

[0032] Figure 2 This is a circuit schematic diagram of a two-choice power supply module for a drone based on an embodiment of the utility model.

[0033] like Figure 2As shown, the two-choice power supply module of the drone includes a first switch, a second switch, a first voltage detection circuit, a second voltage detection circuit, a first current detection circuit, a second current detection circuit and a main controller. The main controller is a power path controller. In one embodiment, the power path controller is an LTC4421 chip.

[0034] Wherein, the first voltage detection circuit includes: a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11 and a twelfth resistor R12, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11 and the twelfth resistor R12 are connected in series in sequence and grounded, wherein the twelfth resistor R12 is directly connected to the ground. The end of the ninth resistor R9 that is not connected to the tenth resistor R10 is connected to the first input terminal A, the connection node of the ninth resistor R9 and the tenth resistor R10 is connected to the first undervoltage detection pin 3 of the power path controller, and the connection node of the eleventh resistor R11 and the twelfth resistor R12 is connected to the first overvoltage detection pin 4 of the power path controller. The second voltage detection circuit includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 are connected in series in sequence and grounded, wherein the eighth resistor R8 is directly connected to the ground. One end of the fifth resistor R5 that is not connected to the sixth resistor R6 is connected to the second input terminal B, the connection node of the fifth resistor R5 and the sixth resistor R6 is connected to the second undervoltage detection pin 1 of the power path controller, and the connection node of the seventh resistor R7 and the eighth resistor R8 is connected to the second overvoltage detection pin 2 of the power path controller.

[0035] Among them, the first voltage detection circuit is a voltage divider sampling circuit, the first undervoltage detection pin 3 of the power path controller (LTC4421 chip) collects the voltage signal at the connection node of the ninth resistor R9 and the tenth resistor R10, and the first overvoltage detection pin 4 of the power path controller (LTC4421 chip) collects the voltage signal at the connection node of the eleventh resistor R11 and the twelfth resistor R12. By performing voltage division processing on the voltage signal of the first input terminal A, a larger amplitude signal can be converted into a range suitable for processing by the collector.

[0036] Similarly, the second voltage detection circuit is a voltage divider sampling circuit. The second undervoltage detection pin 1 of the power path controller (LTC4421 chip) collects the voltage signal at the connection node of the fifth resistor R5 and the sixth resistor R6, and the second overvoltage detection pin 2 of the power path controller (LTC4421 chip) collects the voltage signal at the connection node of the seventh resistor R7 and the eighth resistor R8. By performing voltage division processing on the voltage signal of the second input terminal B, a signal with a larger amplitude can be converted into a range suitable for processing by the collector.

[0037] Furthermore, the first current detection circuit includes a second resistor R2 connected between the first switch and the output terminal D, and the two ends of the second resistor R2 are respectively connected to the first current detection pin 9 and the second current detection pin 10 of the power path controller; the main controller collects the current provided from the first input terminal to the output terminal through the first current detection pin 9 and the second current detection pin 10, and determines whether it is overcurrent, and disconnects the first switch if overcurrent occurs. The second current detection circuit includes a fourth resistor R4 connected between the second switch and the output terminal D, and the two ends of the fourth resistor R4 are respectively connected to the third current detection pin 13 and the fourth current detection pin 14 of the power path controller, and the main controller collects the current provided from the second input terminal to the output terminal through the third current detection pin 13 and the fourth current detection pin 14, and determines whether it is overcurrent, and disconnects the second switch if overcurrent occurs.

[0038] Furthermore, the first switch includes: a first MOS transistor Q1 and a second MOS transistor Q2, the drain of the first MOS transistor Q1 is connected to the first input terminal A, the drain of the second MOS transistor Q2 is connected to the output terminal D, the source of the first MOS transistor Q1 and the source of the second MOS transistor Q2 are both connected to the first source signal pin 7 of the power path controller, and the gate of the first MOS transistor Q1 and the gate of the second MOS transistor Q2 are both connected to the first gate signal pin 6 of the power path controller; the main controller controls the signals transmitted by the first source signal pin 7 and the first gate signal pin 6 to achieve the purpose of controlling the on and off of the first switch. The second switch includes: a third MOS transistor Q3 and a fourth MOS transistor Q4, the drain of the third MOS transistor Q3 is connected to the second input terminal B, the drain of the fourth MOS transistor Q4 is connected to the output terminal D, the source of the third MOS transistor Q3 and the source of the fourth MOS transistor Q4 are both connected to the second source signal pin 12 of the power path controller, the gate of the third MOS transistor Q3 and the gate of the fourth MOS transistor Q4 are both connected to the second gate signal pin 11 of the power path controller, and the main controller controls the signals transmitted by the second source signal pin 12 and the second gate signal pin 11 to achieve the purpose of controlling the on and off of the second switch.

[0039] Further, the first switch further includes a first resistor R1, a first capacitor C1 and a second capacitor C2, one end of the first resistor R1 is connected to the drain of the first MOS tube Q1, and the other end of the first resistor R1 is grounded through the first capacitor C1, so that the first resistor R1 and the first capacitor C1 form an RC filter to filter and reduce noise on the voltage of the first input terminal A. One end of the second capacitor C2 is connected to the first gate signal pin 6, the gate of the first MOS tube Q1 and the gate of the second MOS tube Q2, and the other end of the second capacitor C2 is connected to the second source signal pin 7, the source of the first MOS tube Q1 and the source of the second MOS tube Q2.

[0040] The second switch further includes a third resistor R3, a third capacitor C3 and a fourth capacitor C4, one end of the third resistor R3 is connected to the drain of the third MOS tube Q3, and the other end of the third resistor R3 is grounded through the third capacitor C3, so that the third resistor R3 and the third capacitor C3 form an RC filter to filter and reduce noise on the voltage of the second input terminal B. One end of the fourth capacitor C4 is connected to the second gate signal pin 11, the gate of the third MOS tube Q3 and the gate of the fourth MOS tube Q4, and the other end of the fourth capacitor C4 is connected to the second source signal pin 12, the source of the third MOS tube Q3 and the source of the fourth MOS tube Q4.

[0041] Furthermore, the first power supply pin 5 of the power path controller is connected to the first input terminal A, so that the engine generator supplies power to the power path controller. The second power supply pin 8 of the power path controller is connected to the second input terminal B, so that the onboard power supply supplies power to the power path controller.

[0042] The first MOS transistor Q1, the second MOS transistor Q2, the third MOS transistor Q3 and the fourth MOS transistor Q4 are all P-channel MOS transistors. When the voltage between the gate and the source of the P-channel MOS transistor is less than the threshold voltage, it is in a cut-off state; when the voltage between the gate and the source of the P-channel MOS transistor is greater than the threshold voltage, a "channel" composed of load electrons is formed in the P-type base region, so that a conductive path is formed between the drain and the source.

[0043] In particular, since the common source between the first MOS tube Q1 and the second MOS tube Q2 is reversely connected in series to form a load switch, the circuit can be disconnected or closed by the gate voltage of the first MOS tube Q1 and the gate voltage of the second MOS tube Q2, that is, the switch control of the load. Therefore, when the first switch needs to be turned on, the first gate signal pin 6 outputs a high-level signal, and the first source signal pin 7 outputs a low-level signal; when the first switch needs to be disconnected, the first gate signal pin 6 outputs a low-level signal. Similarly, since the common source between the third MOS tube Q3 and the fourth MOS tube Q4 is reversely connected in series to form a load switch, the circuit can be disconnected or closed by the gate voltage of the third MOS tube Q3 and the gate voltage of the fourth MOS tube Q4, that is, the switch control of the load. Therefore, when the second switch needs to be turned on, the second gate signal pin 11 outputs a high-level signal, and the second source signal pin 12 outputs a low-level signal; when the first switch needs to be disconnected, the second gate signal pin 11 outputs a low-level signal.

[0044] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0045] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0046] Although this specification has shown and described a plurality of embodiments of the utility model, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, modifications and alternatives without departing from the idea and spirit of the utility model. It should be understood that in the process of practicing the utility model, various alternatives to the embodiments of the utility model described herein may be adopted.

Claims

1. A two-choice power supply module for drones, characterized in that: include: Output terminal, used to connect to the UAV’s electrical equipment; A first input terminal, used for connecting to an engine power generation device; The first input end is connected to the output end, and a first switch is provided between the first input end and the output end; A second input terminal, used to connect to an onboard power supply; the second input terminal is connected to the output terminal, and a second switch is provided between the second input terminal and the output terminal; A main controller is connected to the first switch and is used to control the on and off of the first switch. The main controller is also connected to the second switch and is used to control the on and off of the second switch. The main controller is configured to control the first switch and the second switch to selectively turn on.

2. The two-choice power supply module for a drone according to claim 1, characterized in that: Also includes a first voltage detection circuit and a second voltage detection circuit; The main controller is configured to detect whether the voltage at the first input terminal is overvoltage or undervoltage through the first voltage detection circuit, and detect whether the voltage at the second input terminal is overvoltage or undervoltage through the second voltage detection circuit; The main controller is further configured to control the first switch to be disconnected when an overvoltage or undervoltage is detected at the first input terminal, and to control the second switch to be disconnected when an overvoltage or undervoltage is detected at the second input terminal.

3. The two-choice power supply module for a drone according to claim 2, characterized in that: The first voltage detection circuit comprises a ninth resistor (R9), a tenth resistor (R10), an eleventh resistor (R11) and a twelfth resistor (R12) connected in sequence between the first input terminal and the ground terminal, a first undervoltage detection pin of the main controller is connected between the ninth resistor (R9) and the tenth resistor (R10), and a first overvoltage detection pin of the main controller is connected between the eleventh resistor (R11) and the twelfth resistor (R12); The second voltage detection circuit comprises a fifth resistor (R5), a sixth resistor (R6), a seventh resistor (R7) and an eighth resistor (R8) which are sequentially connected between the second input terminal and the ground terminal, a second undervoltage detection pin of the main controller is connected between the fifth resistor (R5) and the sixth resistor (R6), and a second overvoltage detection pin of the main controller is connected between the seventh resistor (R7) and the eighth resistor (R8).

4. The two-choice power supply module for a drone according to claim 1, characterized in that: Also includes a first current detection circuit and a second current detection circuit; The main controller is configured to detect whether the current provided by the first input terminal to the output terminal is overcurrent through the first current detection circuit, and detect whether the current provided by the second input terminal to the output terminal is overcurrent through the second current detection circuit; The main controller is further configured to control the first switch to be disconnected when an overcurrent is detected in the current provided by the first input terminal to the output terminal, and to control the second switch to be disconnected when an overcurrent is detected in the current provided by the second input terminal to the output terminal.

5. The one-or-the-other power supply module for a drone according to claim 4, characterized in that: The first current detection circuit comprises a second resistor (R2) connected between the first switch and the output end, and two ends of the second resistor (R2) are respectively connected to a first current detection pin and a second current detection pin of the main controller; The second current detection circuit comprises a fourth resistor (R4) connected between the second switch and the output end, and two ends of the fourth resistor (R4) are respectively connected to a third current detection pin and a fourth current detection pin of the main controller.

6. A two-choice power supply module for a drone according to any one of claims 1 to 5, characterized in that: The first switch comprises: a first MOS tube (Q1) and a second MOS tube (Q2), wherein the drain of the first MOS tube (Q1) is connected to the first input end, the drain of the second MOS tube (Q2) is connected to the output end, the source of the first MOS tube (Q1) and the source of the second MOS tube (Q2) are both connected to a first source signal pin of the main controller, and the gate of the first MOS tube (Q1) and the gate of the second MOS tube (Q2) are both connected to a first gate signal pin of the main controller, wherein the first MOS tube (Q1) and the second MOS tube (Q2) are both P-channel MOS tubes; The second switch comprises: a third MOS tube (Q3) and a fourth MOS tube (Q4), wherein the drain of the third MOS tube (Q3) is connected to the second input end, the drain of the fourth MOS tube (Q4) is connected to the output end, the source of the third MOS tube (Q3) and the source of the fourth MOS tube (Q4) are both connected to the second source signal pin of the main controller, and the gate of the third MOS tube (Q3) and the gate of the fourth MOS tube (Q4) are both connected to the second gate signal pin of the main controller, wherein the third MOS tube (Q3) and the fourth MOS tube (Q4) are both P-channel MOS tubes.

7. A two-choice power supply module for a drone according to any one of claims 1 to 5, characterized in that: The main controller is a power path controller.

8. A two-choice power supply module for a drone according to any one of claims 1 to 5, characterized in that: The engine power generation device is connected to the first input end through a battery, the engine power generation device charges the battery, and the battery supplies power to the first input end.

9. A two-choice power supply module for a drone according to any one of claims 1 to 5, characterized in that: It also includes a substrate; the first input end, the second input end, the output end, the main controller, the first switch and the second switch are all arranged on the substrate and connected through metal wires embedded in the substrate.

10. A two-or-one power supply module for a drone according to any one of claims 1 to 5, characterized in that: It also includes a protective shell, wherein a shell wall of the protective shell is provided with gaps for avoiding the first input end, the second input end and the output end.

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