A power switching circuit for a drone vehicle-mounted mobile hangar

Abstract

The application relates to the technical field of power supply switching, and discloses a power supply switching circuit of a vehicle-mounted mobile hangar of an unmanned aerial vehicle, which is characterized in that a battery power supply circuit and an adapter power supply circuit are designed to respectively supply power to the vehicle-mounted mobile hangar; when no external charging adapter is connected, the battery power supply circuit keeps supplying power to the vehicle-mounted mobile hangar; when an external adapter is connected, the adapter supplies power to the vehicle-mounted mobile hangar, and charges the lithium battery of the battery power supply circuit, so that the vehicle-mounted mobile hangar can be started in real time, the waiting time is saved, real-time operation is strong, timeliness is good, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of power switching technology, and in particular to a power switching circuit for a mobile hangar for unmanned aerial vehicles. Background Technology

[0002] Currently, drones are increasingly widely used in the power grid industry, leading to the development of many related iterative products. One such product is the portable handheld vehicle-mounted mobile hangar. These systems currently use lithium batteries for power. After continuous operation or after being left unused for a month or several months, the lithium battery voltage usually drops below 3V, causing the system to automatically shut down. In this situation, users typically plug in an external adapter to charge the device, which requires waiting for a period of time before it can be turned on again, resulting in a poor user experience. This is especially problematic when the hangar needs to issue urgent instructions to deploy aircraft routes, leading to poor real-time operability and timeliness. Summary of the Invention

[0003] This invention provides a power switching circuit for a vehicle-mounted mobile hangar for unmanned aerial vehicles (UAVs), which solves the technical problem of poor real-time operability and timeliness when charging the vehicle-mounted mobile hangar by inserting an external adapter.

[0004] In view of this, the first aspect of the present invention provides a power switching circuit for a vehicle-mounted mobile hangar for unmanned aerial vehicles, including: a battery power supply circuit and an adapter power supply circuit;

[0005] The battery power supply circuit includes a lithium battery, a first PMOS transistor (Q5), a second PMOS transistor (Q6), a Schottky diode (D2), a first NPN transistor (Q7), and a third PMOS transistor (Q8). The lithium battery is connected to the source of the first PMOS transistor (Q5), the drain of the first PMOS transistor (Q5) is connected to the drain of the second PMOS transistor (Q6), and the gate of the second PMOS transistor (Q6) is connected to the anode of the Schottky diode (D2), the anode of the first NPN transistor (Q7), and the gate of the second PMOS transistor (Q8). The base of the transistor (Q7) is connected to the 12V voltage terminal, the negative terminal of the Schottky diode (D2) is connected to the lithium battery, the collector of the first NPN transistor (Q7) is connected to the gate of the third PMOS transistor (Q8), the emitter of the first NPN transistor (Q7) is grounded, the drain of the third PMOS transistor (Q8) is connected to the 12V voltage terminal, and the source of the second PMOS transistor Q6 and the source of the third PMOS transistor (Q8) are both connected to the vehicle-mounted mobile hangar.

[0006] The adapter power supply circuit includes an adapter input port, a second NPN transistor (Q3), and a third NPN transistor (Q4). The adapter input port is connected to the base of the second NPN transistor (Q3), the emitter of the second NPN transistor (Q3) is grounded, the collector of the second NPN transistor (Q3) is connected to the source of the first PMOS transistor (Q5) and the base of the third NPN transistor (Q4), the collector of the third NPN transistor (Q4) is connected to the gate and source of the first PMOS transistor (Q5), and the emitter of the third NPN transistor (Q4) is grounded.

[0007] Preferably, the adapter input port is electrically connected to an external charging adapter.

[0008] Preferably, the base of the second NPN transistor (Q3) is connected to the input port of the adapter through a first resistor (R5), the base of the second NPN transistor (Q3) is grounded through a second resistor (R6), and the collector of the second NPN transistor (Q3) is connected to the source of the first PMOS transistor (Q5) through a third resistor (R7).

[0009] Preferably, the base of the third NPN transistor (Q4) is connected to the collector of the second NPN transistor (Q3) through a fourth resistor (R8), the base of the third NPN transistor (Q4) is grounded through a fifth resistor (R9), and the collector of the third NPN transistor (Q4) is connected to the source of the first PMOS transistor (Q5) through a sixth resistor (R10).

[0010] Preferably, the gate of the second PMOS transistor Q6 is grounded through a seventh resistor (R11).

[0011] Preferably, the base of the first NPN transistor (Q7) is connected to the positive terminal of the Schottky diode (D2) through an eighth resistor (R12), and the base of the first NPN transistor (Q7) is grounded through a ninth resistor (R13).

[0012] Preferably, the gate of the third PMOS transistor (Q8) is connected to the vehicle-mounted mobile hangar via a tenth resistor (R14).

[0013] As can be seen from the above technical solutions, the present invention has the following advantages:

[0014] This invention designs a battery power supply circuit and an adapter power supply circuit to power the vehicle-mounted mobile hangar respectively. When no external charging adapter is connected, the battery power supply circuit continues to power the vehicle-mounted mobile hangar. When an external adapter is plugged in, the external adapter powers the vehicle-mounted mobile hangar and charges the lithium battery in the battery power supply circuit. This allows the vehicle-mounted mobile hangar to be turned on in real time, saving waiting time, providing strong real-time operability and good timeliness, and improving the user experience. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the power supply circuit for a vehicle-mounted mobile hangar in the prior art;

[0016] Figure 2 A schematic diagram of trickle charging for the power circuit of a vehicle-mounted mobile hangar in the prior art;

[0017] Figure 3 This is a schematic diagram of a power switching circuit for a vehicle-mounted mobile hangar for unmanned aerial vehicles (UAVs) provided in an embodiment of the present invention. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1 The diagram shows a power circuit schematic of a vehicle-mounted mobile hangar in the prior art. When the vehicle-mounted mobile hangar has been operating continuously for a period of time, or after the vehicle-mounted mobile hangar has been stored for one or several months, the voltage of the lithium battery drops below 3V. At this time, when an external 12V adapter is plugged in, the adapter will charge the lithium battery through Q2. According to the inherent characteristics of the lithium battery, it will first enter the trickle charging stage, such as... Figure 2 As shown, its Figure 2 This diagram illustrates trickle charging in the power circuit of a conventional vehicle-mounted mobile hangar. The trickle charging current is very small, typically 0.1cc. As seen through the purple line, the lithium battery voltage rises slowly, requiring a period of time before reaching the minimum operating voltage threshold for the vehicle-mounted mobile hangar. This charging method offers a poor user experience, lacks real-time operability, and is not timely.

[0020] Therefore, the present invention provides a power switching circuit for a vehicle-mounted mobile hangar for unmanned aerial vehicles, such as... Figure 3 As shown, it includes: a battery-powered circuit and an adapter-powered circuit;

[0021] The battery power supply circuit includes a lithium battery, a first PMOS transistor Q5, a second PMOS transistor Q6, a Schottky diode D2, a first NPN transistor Q7, and a third PMOS transistor Q8. The lithium battery is connected to the source of the first PMOS transistor Q5, the drain of the first PMOS transistor Q5 is connected to the drain of the second PMOS transistor Q6, the gate of the second PMOS transistor Q6 is connected to the anode of the Schottky diode D2, the base of the first NPN transistor Q7, and the 12V voltage terminal, respectively, the cathode of the Schottky diode D2 is connected to the lithium battery, the collector of the first NPN transistor Q7 is connected to the gate of the third PMOS transistor Q8, the emitter of the first NPN transistor Q7 is grounded, the drain of the third PMOS transistor Q8 is connected to the 12V voltage terminal, and the sources of the second PMOS transistor Q6 and the third PMOS transistor Q8 are both connected to the vehicle-mounted mobile hangar.

[0022] The adapter power supply circuit includes an adapter input port, a second NPN transistor Q3, and a third NPN transistor Q4. The adapter input port is connected to the base of the second NPN transistor Q3, the emitter of the second NPN transistor Q3 is grounded, the collector of the second NPN transistor Q3 is connected to the source of the first PMOS transistor Q5 and the base of the third NPN transistor Q4, the collector of the third NPN transistor Q4 is connected to the gate and source of the first PMOS transistor Q5, and the emitter of the third NPN transistor Q4 is grounded.

[0023] The adapter input port is electrically connected to an external charging adapter.

[0024] The system consists of two lithium batteries connected in series, with a voltage range of 7.4V to 8.4V.

[0025] The base of the second NPN transistor Q3 is connected to the adapter input port through the first resistor R5, the base of the second NPN transistor Q3 is grounded through the second resistor R6, and the collector of the second NPN transistor Q3 is connected to the source of the first PMOS transistor Q5 through the third resistor R7.

[0026] The base of the third NPN transistor Q4 is connected to the collector of the second NPN transistor Q3 through the fourth resistor R8, the base of the third NPN transistor Q4 is grounded through the fifth resistor R9, and the collector of the third NPN transistor Q4 is connected to the source of the first PMOS transistor Q5 through the sixth resistor R10.

[0027] The gate of the second PMOS transistor Q6 is grounded through the seventh resistor R11.

[0028] The base of the first NPN transistor Q7 is connected to the positive terminal of the Schottky diode D2 through the eighth resistor R12, and the base of the first NPN transistor Q7 is grounded through the ninth resistor R13.

[0029] The gate of the third PMOS transistor Q8 is connected to the vehicle-mounted mobile hangar through the tenth resistor R14.

[0030] It should be noted that the following describes the working principle of the power switching circuit for a UAV vehicle-mounted mobile hangar provided by this invention, in conjunction with the circuit working logic principle in Table 1:

[0031] 1) When the external 12V adapter is input, the base voltage Ub of the second NPN transistor Q3 is (12V / R5+R6)XR6=10.9V>>the turn-on voltage Ube 0.7V. At this time, the second NPN transistor Q3 is turned on, and the collector of the second NPN transistor Q3 is equivalent to being short-circuited with its emitter. The potential of the emitter is the ground voltage 0V. At this time, when the second NPN transistor Q3 is turned on, the collector of the second NPN transistor Q3 is also equivalent to being grounded.

[0032] 2) Since the collector of the second NPN transistor Q3 is grounded, the voltage at the connection point of resistors R7 and R8 connected to the collector of the second NPN transistor Q3 is 0V. At this time, the potential of the base of the third NPN transistor Q4 is also 0V. At this time, the conduction voltage Ube of the third NPN transistor Q4 is 0V < the conduction voltage 0.7V of the third NPN transistor Q4. Therefore, the third NPN transistor Q4 is not conducting, which is equivalent to being in an open state.

[0033] 3) Since the third NPN transistor Q4 is in the off state at this time, the collector voltage of the third NPN transistor Q4 (that is, the collector voltage of Q5) is equal to the source voltage of the first PMOS transistor Q5, that is, the voltage of the first PMOS transistor Q5 Ugs = 0V (the conduction condition of the first PMOS transistor Q5 is Ugs < 0). Therefore, the first PMOS transistor Q5 is not conducting at this time, which is equivalent to being in the off state.

[0034] 4) The gate of the second PMOS transistor Q6 is connected to the 12V adapter input voltage, and the source of the second PMOS transistor Q6 is connected to the positive power supply terminal of the vehicle mobile hangar (less than 12V). At this time, the voltage Ugs of the second PMOS transistor Q6 is 12V-0.2V=11.8V>0, the second PMOS transistor Q6 is turned on, and the 12V adapter supplies power to the vehicle mobile hangar through the internal body diode of the second PMOS transistor Q6.

[0035] 5) The base voltage Ub of the first NPN transistor Q7 is (12V / R5+R6)X R6 = 10.9V >> the turn-on voltage Ube0.7V. At this time, the first NPN transistor Q7 is turned on, and the collector of the first NPN transistor Q7 is equivalent to being short-circuited with the emitter. The potential of the emitter is the ground voltage. At this time, when the first NPN transistor Q7 is turned on, the collector of the first NPN transistor Q7 is also equivalent to being grounded.

[0036] 6) Since the collector of the first NPN transistor Q7 is essentially grounded (meaning the gate of the third PMOS transistor Q8 is 0V), the source of the third PMOS transistor Q8 (which is also the source of the second PMOS transistor Q6) has a voltage Us = 12V - 0.2V = 11.8V. At this time, Q8Ugs = 0 - 11.8V < 0V (the conduction condition of Q8 is Ugs < 0V). At this time, the third PMOS transistor Q8 is turned on (when the third PMOS transistor Q8 is turned on, it is equivalent to a short circuit between the drain and the source). The 12V adapter input is supplied to the vehicle-mounted mobile hangar through the drain of the third PMOS transistor Q8 to the source.

[0037] This circuit is designed to power the vehicle-mounted mobile hangar via a dual-channel 12V adapter input (two field-effect transistors, a second PMOS transistor Q6 and a third PMOS transistor Q8). When the external 12V adapter is input, it charges the lithium battery VBAT through a Schottky diode D2.

[0038] Table 1

[0039]

[0040] It should be noted that this invention provides a power switching circuit for a vehicle-mounted mobile hangar for unmanned aerial vehicles (UAVs). By designing a battery power supply circuit and an adapter power supply circuit to power the vehicle-mounted mobile hangar respectively, when no external charging adapter is connected, the battery power supply circuit continues to power the vehicle-mounted mobile hangar. When an external adapter is plugged in, the circuit switches to power the vehicle-mounted mobile hangar through the external adapter and charges the lithium battery in the battery power supply circuit. This allows the vehicle-mounted mobile hangar to be powered on in real time, saving waiting time, providing strong real-time operability and good timeliness, and improving the user experience.

[0041] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power switching circuit for a vehicle-mounted mobile hangar for unmanned aerial vehicles (UAVs), characterized in that, include: Battery-powered circuit and adapter-powered circuit; The battery power supply circuit includes a lithium battery, a first PMOS transistor (Q5), a second PMOS transistor (Q6), a Schottky diode (D2), a first NPN transistor (Q7), and a third PMOS transistor (Q8). The lithium battery is connected to the source of the first PMOS transistor (Q5), the drain of the first PMOS transistor (Q5) is connected to the drain of the second PMOS transistor (Q6), and the gate of the second PMOS transistor (Q6) is connected to the anode of the Schottky diode (D2) and the first NPN transistor (Q8). The base of the N-type transistor (Q7) is connected to the 12V voltage terminal, the cathode of the Schottky diode (D2) is connected to the lithium battery, the collector of the first NPN transistor (Q7) is connected to the gate of the third PMOS transistor (Q8), the emitter of the first NPN transistor (Q7) is grounded, the drain of the third PMOS transistor (Q8) is connected to the 12V voltage terminal, and the sources of the second PMOS transistor (Q6) and the third PMOS transistor (Q8) are both connected to the vehicle-mounted mobile hangar. The adapter power supply circuit includes an adapter input port, a second NPN transistor (Q3), and a third NPN transistor (Q4). The adapter input port is connected to the base of the second NPN transistor (Q3), the emitter of the second NPN transistor (Q3) is grounded, the collector of the second NPN transistor (Q3) is connected to the source of the first PMOS transistor (Q5) and the base of the third NPN transistor (Q4), and the collector of the third NPN transistor (Q4) is connected to the gate and source of the first PMOS transistor (Q5). The emitter of the first NPN transistor (Q7) is grounded; the base of the second NPN transistor (Q3) is grounded through the second resistor (R6); the base of the third NPN transistor (Q4) is grounded through the fifth resistor (R9); the gate of the second PMOS transistor (Q6) is grounded through the seventh resistor (R11); the base of the first NPN transistor (Q7) is connected to the anode of the Schottky diode (D2) through the eighth resistor (R12), and the base of the first NPN transistor (Q7) is grounded through the ninth resistor (R13); the gate of the third PMOS transistor (Q8) is connected to the vehicle-mounted mobile hangar through the tenth resistor (R14).

2. The power switching circuit for the UAV vehicle-mounted mobile hangar according to claim 1, characterized in that, The adapter input port is electrically connected to an external charging adapter.

3. The power switching circuit for the UAV vehicle-mounted mobile hangar according to claim 1, characterized in that, The base of the second NPN transistor (Q3) is connected to the input port of the adapter through the first resistor (R5), and the collector of the second NPN transistor (Q3) is connected to the source of the first PMOS transistor (Q5) through the third resistor (R7).

4. The power switching circuit for the UAV vehicle-mounted mobile hangar according to claim 1, characterized in that, The base of the third NPN transistor (Q4) is connected to the collector of the second NPN transistor (Q3) through the fourth resistor (R8), and the collector of the third NPN transistor (Q4) is connected to the source of the first PMOS transistor (Q5) through the sixth resistor (R10).

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