Power supply management system and method and mooring unmanned aerial vehicle

Abstract

The embodiment of the invention discloses a power supply management system and method and a mooring unmanned aerial vehicle. The power supply management system comprises an airborne power supply, a lithium battery and a current detection module. The airborne power supply is used for supplying power to the mooring unmanned aerial vehicle and charging a lithium battery mounted on the mooring unmanned aerial vehicle; the lithium battery is used for supplying power to the mooring unmanned aerial vehicle when the airborne power supply is abnormal in power supply; the current detection module is used for detecting the charging current when the airborne power supply charges the lithium battery and feeding back the charging current to the airborne power supply to adjust the output voltage of the airborne power supply. According to the technical scheme provided by the embodiment of the invention, when the airborne power supply is abnormal, the lithium battery supplies power to the mooring unmanned aerial vehicle, so that air crash of the mooring unmanned aerial vehicle due to sudden power failure is prevented. And the charging current of the lithium battery is detected through the current detection module, and the airborne power supply reduces the self output voltage to charge the lithium battery, so that the lithium battery is prevented from being damaged by overlarge charging voltage, and the lithium battery does not need to be disassembled in the charging process.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle power supply, and in particular to a power supply management system, method and a tethered unmanned aerial vehicle. Background Art

[0002] A tethered drone is a new type of drone that combines a drone with a tether cable. The difference from ordinary drones is that the power supply is directly from the ground power supply. However, during the flight, the tether cable may break or the contact is poor, which may cause the drone to fail to fly normally. Generally, a small-capacity lithium battery is retained to deal with emergencies.

[0003] However, the current method of charging lithium batteries still requires the drone to be grounded first, the lithium battery to be removed and then charged with a special charger. This is the same as the ordinary drone charging method, which affects the flight time of the drone and brings a lot of inconvenience to users. Summary of the invention

[0004] The present invention provides a power supply management system, method and tethered drone, so as to solve the problem that it is inconvenient to charge the backup lithium battery of the existing tethered drone, so that the tethered drone can fly for a long time to protect the lithium battery.

[0005] According to one aspect of the present invention, there is provided a power supply management system, which is applied to a tethered drone, the system comprising: an onboard power supply, a lithium battery and a current detection module;

[0006] The onboard power supply is used to supply power to the tethered drone and to charge the lithium battery installed on the tethered drone;

[0007] The lithium battery is used to supply power to the tethered drone when the onboard power supply is abnormal;

[0008] The current detection module is used to detect the charging current when the onboard power supply charges the lithium battery, and feed back the charging current to the onboard power supply to adjust the output voltage of the onboard power supply.

[0009] Optionally, the power supply management system further includes: a voltage feedback module, connected to the current detection module and the onboard power supply, and configured to control the constant voltage output of the onboard power supply according to a feedback voltage when the onboard power supply charges the lithium battery;

[0010] The onboard power supply constant voltage output refers to the onboard power supply outputting a constant voltage output after adjusting the output voltage according to the charging current.

[0011] Optionally, the voltage feedback module includes a first resistor, a second resistor and a third resistor;

[0012] The first end of the first resistor is connected to the onboard power supply, the first end of the second resistor is connected to the second end of the first resistor, the second end of the second resistor is connected to the first end of the third resistor, the second end of the third resistor is grounded, and the voltage feedback sampling point is located between the second resistor and the third resistor.

[0013] Optionally, the current detection module includes a fourth resistor and a current detector;

[0014] The first end of the fourth resistor is connected to the onboard power supply, and the second end of the fourth resistor is connected to the lithium battery; the first end of the current detector is connected to the onboard power supply, the second end of the current detector is connected to the lithium battery, and the third end of the current detector is connected to the voltage feedback sampling point.

[0015] Optionally, the current detection module further includes:

[0016] A diode, wherein the anode of the diode is connected to the third end of the current detector, and the cathode of the diode is connected to the voltage feedback sampling point, for preventing the current from flowing reversely to the current detector.

[0017] Optionally, the current detection module includes at least one of a current transformer, a Hall sensor or a sampling resistor.

[0018] Optionally, the current detection module further includes:

[0019] A capacitor, a first end of the capacitor is connected to the cathode of the diode, and a second end of the capacitor is grounded.

[0020] According to another aspect of the present invention, a power supply management method is provided, which is performed by the power supply management system provided by any of the above embodiments, and the method includes:

[0021] Acquiring status information of the onboard power supply, and determining a power supply mode of the tethered drone according to the status information;

[0022] If the state of the onboard power supply is normal, the onboard power supply supplies power to the tethered drone and charges the lithium battery;

[0023] If the state of the onboard power supply is abnormal, the tethered drone is powered by the lithium battery.

[0024] Optionally, charging the lithium battery includes:

[0025] Detecting the charging current of the lithium battery and adjusting the output voltage of the onboard power supply according to the charging current;

[0026] If the lithium battery has no charging current, the onboard power supply is kept at a constant voltage to power the tethered drone;

[0027] If the lithium battery has a charging current, the output voltage of the onboard power supply is reduced according to the charging current.

[0028] According to another aspect of the present invention, a tethered drone is provided, comprising: any one of the power supply management systems described above.

[0029] The technical solution of the embodiment of the present invention is that the onboard power supply is used to power the tethered drone when the onboard power supply is normal, and the lithium battery of the tethered drone is used to provide short-term power when the onboard power supply is abnormal, thereby preventing the tethered drone from crashing due to an onboard power failure. When the onboard power supply is normal, the lithium battery is charged by the onboard power supply without removing the lithium battery, and the charging method is simple. The charging current when the onboard power supply is charging the lithium battery is detected by the current detection module, and the charging current is fed back to the onboard power supply. The onboard power supply adjusts the output voltage to avoid excessive output voltage impacting the lithium battery, and will not cause damage to the lithium battery. The onboard power supply of the power supply management system provided by the embodiment of the present invention can directly charge the lithium battery without disassembling the lithium battery and without using an additional dedicated charger. It has a simple structure, is easy to use, has low power consumption, and effectively reduces costs.

[0030] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic diagram of the structure of a power supply management system provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a voltage feedback module provided in an embodiment of the present invention;

[0034] Figure 3 A structural schematic diagram of the effect of current detection on voltage feedback sampling provided by an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the structure of another power supply management system provided by an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the structure of another power supply management system provided by an embodiment of the present invention;

[0037] Figure 6 A flow chart of a power supply management method provided by an embodiment of the present invention;

[0038] Figure 7 The present invention provides a flow chart of a method for managing charging of a lithium battery by an onboard power supply. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] Figure 1 A schematic diagram of the structure of a power supply management system provided by an embodiment of the present invention. Figure 1 The power supply management system 100 includes an airborne power supply 10, a lithium battery 20 and a current detection module 30. The airborne power supply 10 is used to supply power to the tethered drone and charge the lithium battery 20 installed on the tethered drone. The lithium battery 20 is used to supply power to the tethered drone when the airborne power supply 10 is abnormal. The current detection module 30 is used to detect the charging current when the airborne power supply 10 charges the lithium battery 20, and feed back the charging current to the airborne power supply 10 to adjust the output voltage of the airborne power supply 10.

[0042] Specifically, the tethered drone is connected to the ground equipment through a tethering cable, and the ground equipment continuously supplies power during the flight of the tethered drone. The tethering cable is connected to the airborne power supply 10 on the tethered drone, and the airborne power supply 10 continuously supplies power during the flight of the tethered drone. However, during the flight of the tethered drone, the tethering cable may be broken or in poor contact, the ground equipment may be out of power, and the airborne power supply 10 may not be able to supply power to the drone normally. At this time, the lithium battery 20 is used to temporarily supply power to the tethered drone when the airborne power supply 10 is abnormal. When an emergency occurs in the airborne power supply 10, the tethered drone will not crash due to power supply. The lithium battery 20 can enable the tethered drone to make an emergency landing after flying to a safe area, avoiding the risk of crashing. In addition, when the airborne power supply 10 is normally supplied, the lithium battery 20 can also be supplied with power, and there is no need to remove the lithium battery 20 from the tethered drone for charging, which improves the convenience of the tethered drone. Since the capacity of the lithium battery 20 of the tethered drone is generally very small, in order to maintain the power required for the tethered drone to fly, it is necessary to select a lithium battery 20 with a large discharge rate, such as 80C or even 120C. The lithium battery 20 can provide a large amplification current, but the charging current is small and can only accept about 1-5C. When the lithium battery 20 is powering the tethered drone, the lithium battery 20 will discharge rapidly, the charge will decrease rapidly, and the voltage will drop to a lower level in a short time. Once the onboard power supply 10 resumes power supply, the output voltage of the onboard power supply 10 is higher. At this time, the voltage difference between the onboard power supply 10 and the lithium battery 20 is large, and the onboard power supply 10 will charge the lithium battery 20 with a large charging current, which may exceed the charging current allowed by the lithium battery 20 and cause damage to the lithium battery 20. The current measurement module 30 can detect the charging current when the onboard power supply 10 charges the lithium battery 20, and the onboard power supply 10 adjusts the output voltage according to the charging current. When the current detection module 30 detects the charging current, it feeds back the information to the onboard power supply 10 , and the onboard power supply 10 reduces its own output voltage and charges the lithium battery 20 at reduced power to prevent a large voltage from impacting the lithium battery 20 and damaging it.

[0043] The power supply management system provided by the embodiment of the present invention uses the onboard power supply to power the tethered drone when the onboard power supply is normal, and uses the lithium battery of the tethered drone to provide short-term power when the onboard power supply is abnormal, thereby preventing the tethered drone from crashing due to an onboard power supply failure. When the onboard power supply is normal, the lithium battery is charged by the onboard power supply without removing the lithium battery, and the charging method is simple. The charging current when the onboard power supply charges the lithium battery is detected by the current detection module, and the charging current is fed back to the onboard power supply. The onboard power supply adjusts the output voltage to avoid excessive output voltage impacting the lithium battery, and will not cause damage to the lithium battery. The onboard power supply of the power supply management system provided by the embodiment of the present invention can directly charge the lithium battery without disassembling the lithium battery and without using an additional dedicated charger. It has a simple structure, is easy to use, has low power consumption, and effectively reduces costs.

[0044] Optional, Figure 2 The schematic diagram of the structure of the voltage feedback module provided by the embodiment of the present invention is shown in FIG. Figure 2 The power supply management system 100 further includes a voltage feedback module 40, which is connected to the current detection module 30 and the airborne power supply 10, and is used to control the airborne power supply 10 to output a constant voltage according to the feedback voltage when the airborne power supply 10 charges the lithium battery 20. The constant voltage output of the airborne power supply 10 refers to the constant voltage output of the output voltage of the airborne power supply 10 after adjusting the charging current.

[0045] Specifically, the power supply management system of the tethered drone also includes a voltage feedback module 40. When the onboard power supply 10 supplies power to the tethered drone, the voltage feedback module can enable the onboard power supply 10 to maintain a stable output voltage to supply power to the tethered drone. When the onboard power supply 10 charges the lithium battery 20, the current feedback module 30 feeds back the charging current to the onboard power supply 10. The onboard power supply 10 adjusts its output voltage according to the charging current. The voltage feedback module 40 can keep the output voltage of the onboard power supply 10 at the adjusted voltage, so as to stably charge the lithium battery 20.

[0046] Optional, Figure 3 A schematic diagram of the structure of the effect of current detection on voltage feedback sampling provided by an embodiment of the present invention. Figure 2 and Figure 3 The voltage feedback module 49 includes a first resistor R1, a second resistor R2 and a third resistor R3, wherein a first end of the first resistor R1 is connected to the onboard power supply 10, a first end of the second resistor R2 is connected to a second end of the first resistor R1, a second end of the second resistor R2 is connected to a first end of the third resistor R3, a second end of the third resistor R3 is grounded, and a voltage feedback point sampling point is located between the second resistor R2 and the third resistor R3.

[0047] Specifically, the first end of the voltage feedback module 40 is connected to the output end of the onboard power supply 10, and the other end is grounded. The output voltage of the onboard power supply is Vout, and the feedback voltage of the voltage feedback sampling point is Vfb, wherein Vfb is a fixed value, and the resistance values ​​of R1, R2 and R3 can be set according to actual needs, which is not limited in the embodiment of the present invention. Exemplarily, Vfb can be 2.5V, R1 can be 100KΩ, R2 can be 43KΩ, and R3 can be 24KΩ. The calculation formula for the output voltage Vout of the onboard power supply 10 is:

[0048] Vout=Vfb*(R1+R2+R3) / R3 (1)

[0049] According to the above formula (1), the output voltage Vout of the onboard power supply 10 can be calculated. Since the feedback voltage is a fixed value, the output voltage of the onboard power supply 10 is a constant value, and the onboard power supply 10 supplies power to the tethered drone with the constant voltage.

[0050] Specifically, Figure 3 As shown, when the current detection module 30 is connected to the voltage feedback module 40, the output end of the current detection module 30 is connected to the voltage feedback sampling point. When the lithium battery 30 is discharging or not working, the output current Ifb of the current detection module is 0. At this time, the current detection module will not affect the voltage feedback module 40. The airborne power supply works according to the original output voltage and outputs a constant output voltage Vout. When the airborne power supply 10 charges the lithium battery 20, the charging current is I0, and the current detection module 30 generates an output current Ifb=k*I0. At this time, the calculation formula of the output voltage Vout of the airborne power supply 10 is:

[0051] Vout=Vfb+(R1+R2)*(Vfb / R3-Ifb)

[0052] =Vfb*(R1+R2+R3) / R3-(R1+R2)*Ifb (2)

[0053] Due to the output current Ifb of the current detection module 30, the output voltage Vout of the onboard power supply 10 becomes smaller. As can be seen from the above formula (2), the larger the charging current, the smaller the output voltage of the onboard power supply 10, so that the lithium battery 20 can be effectively protected and charged within the charging capacity range allowed by the lithium battery 20.

[0054] Optional, Figure 4 The structure diagram of the current detection module provided by the embodiment of the present invention is shown in FIG. Figure 4The current detection module 30 includes a fourth resistor R4 and a current detector 31, a first end of the fourth resistor R4 is connected to the onboard power supply 10, a second end of the fourth resistor R4 is connected to the lithium battery 20, a first end of the current detector 31 is connected to the onboard power supply 10, a second end of the current detector 31 is connected to the lithium battery 20, and a third end of the current detector 31 is connected to the voltage feedback sampling point.

[0055] Specifically, the current detector 31 can convert the voltage across the fourth resistor R4 into the output current Ifb in proportion, and the proportion relationship is Ifb / V SENSE =10000, the unit is uA / V, that is, for every 1V voltage applied to the fourth resistor R4, a current of 10000uA can be output through the current detector 31. Among them, the resistance value of the fourth resistor can be set according to actual needs, and the embodiment of the present invention is not limited to this. An exemplary R4 can be 0.001Ω. The rated voltage of the lithium battery 20 installed in the tethered drone is a fixed value, and an exemplary rated voltage of the lithium battery 20 can be 15.2V. If the output voltage Vout of the onboard power supply at a certain moment is xV, and the voltage of the lithium battery 20 is 15.2V, the voltage applied to both ends of the fourth resistor R4 is equal to the output voltage of the onboard power supply 10 at this moment minus the voltage value of the lithium battery 20, that is, (x-15.2)V, then the output current Ifb of the current detection module is 10(x-15.2)mA. Substituting the above formula (2) into the output voltage Vout of the onboard power supply 20 can be calculated. For example, R1 is 100KΩ, R2 is 43KΩ, R3 is 24KΩ, and R4 is 0.001Ω. By calculation, it can be concluded that the output voltage of the onboard power supply 10 is 15.202V. The rated voltage of the lithium battery 20 is 15.2V, which is within the safe charging range and will not cause damage to the lithium battery 20. In addition, when the lithium battery 20 is discharged, the resistance value of the fourth resistor R4 is very small, and the power consumed can be almost ignored.

[0056] The tethered drone power supply management system provided by the embodiment of the present invention reasonably adjusts the output voltage of the onboard power supply through the current detection module and the voltage feedback module when charging the lithium battery, thereby avoiding the output voltage of the onboard power supply being too large to impact the charged lithium battery and causing no damage to the lithium battery. There is no need to configure a dedicated charger, the structure is simple, and the use is convenient. In addition, the power consumed by the resistors in the system is extremely small and can be ignored, thereby effectively reducing the cost.

[0057] Optional, Figure 5 A schematic diagram of the structure of another power supply management system provided by an embodiment of the present invention. Figure 5The current detection module 30 further includes a diode D1 , the anode of the diode D1 is connected to the third end of the current detector 31 , and the cathode of the diode D1 is connected to the voltage feedback sampling point, so as to prevent the current from flowing back to the current detector 31 .

[0058] Specifically, the current detection module 30 further includes a diode D1, the anode of the diode D1 is connected to the third terminal of the current detector 31, and the cathode of the diode D1 is connected to the voltage feedback point. When the lithium battery 20 is discharged or the onboard power supply 10 is charging the lithium battery 20 with a small current, a current may flow from the voltage feedback sampling point to the current detector 31. The diode D1 can prevent the current from flowing in the reverse direction and prevent the current from flowing from the voltage feedback sampling point to the current detector 31, thereby protecting the circuit and preventing the components in the circuit from being damaged.

[0059] Optionally, based on the above embodiment, continue to refer to Figure 5 The current detection module further includes a capacitor C1, a first end of the capacitor C1 is connected to the cathode of the diode D1, and a second end of the capacitor C1 is grounded.

[0060] Specifically, the current detection module 30 further includes a capacitor C1, a first end of the capacitor C1 is connected to the cathode of the diode D1, and a second end of the capacitor C1 is grounded. When the onboard power supply 10 charges the lithium battery 20, the capacitor C1 can convert the output current Ifb of the current detection module 30 into a smoother direct current, remove interference in the signal for filtering, and prevent other components from interfering with the output current Ifb.

[0061] Optionally, the current detection module 30 includes at least one of a current transformer, a Hall sensor and a sampling resistor.

[0062] Specifically, the current detection module 30 can use circuits such as current transformers, Hall sensors, sampling resistors, etc. to detect the charging current of the lithium battery 20, and feed the charging current back to the onboard power supply 10 so that the onboard power supply 10 can adjust the output voltage.

[0063] The embodiment of the present invention also provides a power supply management method. Figure 6 This is a flow chart of a power supply management method provided by an embodiment of the present invention. The method can be executed by the power supply management system provided by any of the above embodiments.

[0064] like Figure 6 As shown, the power supply management method provided by the embodiment of the present invention includes:

[0065] S110: Acquire status information of an onboard power supply, and determine a power supply mode of the tethered drone according to the status information.

[0066] Specifically, refer to Figure 5In general, a tethered drone is powered by an onboard power supply 10, which is connected to the ground equipment through a tethering cable, and can continuously power the drone. However, it is possible that the ground equipment cannot continuously power the drone due to a failure of the ground equipment, a break in the tethering cable, or a failure of the onboard power supply 10. Therefore, before powering the tethered drone, it is necessary to first obtain the status information of the onboard power supply 10, determine whether the onboard power supply 10 is normal, and determine the power supply mode of the tethered drone according to the status of the onboard power supply 10.

[0067] S120: If the status of the onboard power supply is normal, the onboard power supply supplies power to the tethered drone and charges the lithium battery.

[0068] Specifically, when the status information of the onboard power supply 10 is obtained and it is determined that the status of the onboard power supply 10 is normal, it means that there are no faults in the ground equipment, the tethered cable and the onboard power supply 10. At this time, the tethered drone can be powered by the onboard power supply 10, and the onboard power supply 10 can also charge the lithium battery 20 when the lithium battery 20 is insufficient.

[0069] S130: If the state of the onboard power supply is abnormal, the tethered drone is powered by the lithium battery.

[0070] Specifically, when the status information of the onboard power supply 10 is abnormal, it indicates that the onboard power supply 10, the ground equipment or the tethered cable is faulty, and the onboard power supply 10 cannot supply power to the tethered drone. The tethered drone cannot fly normally. At this time, the lithium battery 20 of the tethered drone can be used for a short period of time to prevent the drone from suddenly losing power and crashing. The lithium battery 20 can enable the drone to fly for a short period of time and land in a safe area to prevent the drone from suddenly losing power and crashing.

[0071] Optional, Figure 7 A flowchart of a method for managing the charging of a lithium battery by an onboard power supply provided in an embodiment of the present invention. Figure 7 , the power supply management method provided by the embodiment of the present invention includes:

[0072] S210, detecting the charging current of the lithium battery, and adjusting the output voltage of the onboard power supply according to the charging current.

[0073] Specifically, when the onboard power supply 10 charges the lithium battery 20, since the output voltage of the onboard power supply 10 is relatively large, while the voltage of the lithium battery 20 is relatively small, there is a relatively large voltage difference between the onboard power supply 10 and the lithium battery 20, which causes the onboard power supply 10 to charge the lithium battery 20 with a relatively large voltage, which is likely to exceed the allowable charging capacity range of the lithium battery 20. Therefore, the charging current of the lithium battery can be detected by the current detection module 30, and the output voltage of the onboard power supply 10 can be adjusted according to the charging current to avoid the output voltage of the onboard power supply 10 being relatively large, causing an impact on the lithium battery 20 and causing damage to the lithium battery 20.

[0074] S220: If the lithium battery has no charging current, the onboard power supply is kept at a constant voltage to power the tethered drone.

[0075] Specifically, when detecting the charging current of the lithium battery 20, if there is no charging current, it means that the lithium battery 20 is sufficiently charged and the onboard power supply 10 does not charge the lithium battery 20. At this time, the onboard power supply 10 only needs to power the tethered drone with a constant voltage to maintain the flight of the tethered drone.

[0076] S230: If the lithium battery has a charging current, the output voltage of the onboard power supply is reduced according to the charging current.

[0077] Specifically, when detecting the charging current of the lithium battery 20, if there is a charging current, it means that the lithium battery 20 is insufficient and needs to be charged, and the onboard power supply 10 charges the lithium battery 20. Because there is a charging current, the onboard power supply 10 adjusts its output voltage according to the charging current, and reduces the output voltage of the onboard power supply 10 to a reasonable range, so as to avoid the output voltage of the onboard power supply 10 being too large to impact the lithium battery 20 and damage the lithium battery 20.

[0078] The power supply management method provided by the embodiment of the present invention uses the onboard power supply to supply power when the onboard power supply is normal, and uses the lithium battery to supply power when the onboard power supply is abnormal, so as to avoid the UAV from crashing due to sudden power outage. When the lithium battery is insufficient, it can be charged through the onboard power supply without disassembling the lithium battery, and the onboard power supply can adjust the output voltage according to the charging current to avoid the output voltage being too large to impact the lithium battery and damage the lithium battery. It can not only protect the lithium battery, but also charge itself without manual disassembly of the lithium battery, which is convenient to use and effectively reduces the cost.

[0079] According to the same inventive concept, an embodiment of the present invention further provides a tethered drone, comprising a power supply management system provided by any of the above embodiments.

[0080] A tethered drone provided in an embodiment of the present invention can achieve the same technical effect as a power supply management system provided in the above-mentioned embodiment of the invention, which will not be described in detail here.

[0081] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A power supply management system, characterized in that: Applied to tethered drones, the system includes: an onboard power supply, a lithium battery, and a current detection module; The onboard power supply is used to supply power to the tethered drone and to charge the lithium battery installed on the tethered drone; The lithium battery is used to supply power to the tethered drone when the onboard power supply is abnormal; The current detection module is used to detect the charging current when the onboard power supply charges the lithium battery, and feed back the charging current to the onboard power supply to adjust the output voltage of the onboard power supply.

2. The power supply management system according to claim 1, characterized in that: Also includes: A voltage feedback module, connected to the current detection module and the onboard power supply, and used for controlling the constant voltage output of the onboard power supply according to the feedback voltage when the onboard power supply charges the lithium battery; The onboard power supply constant voltage output refers to the onboard power supply outputting a constant voltage output after adjusting the output voltage according to the charging current.

3. The power supply management system according to claim 2, characterized in that: The voltage feedback module includes a first resistor, a second resistor and a third resistor; The first end of the first resistor is connected to the onboard power supply, the first end of the second resistor is connected to the second end of the first resistor, the second end of the second resistor is connected to the first end of the third resistor, the second end of the third resistor is grounded, and the voltage feedback sampling point is located between the second resistor and the third resistor.

4. The power supply management system according to claim 1, characterized in that: The current detection module includes a fourth resistor and a current detector; The first end of the fourth resistor is connected to the onboard power supply, and the second end of the fourth resistor is connected to the lithium battery; the first end of the current detector is connected to the onboard power supply, the second end of the current detector is connected to the lithium battery, and the third end of the current detector is connected to the voltage feedback sampling point.

5. The power supply management system according to claim 4, characterized in that: The current detection module also includes: A diode, wherein the anode of the diode is connected to the third end of the current detector, and the cathode of the diode is connected to the voltage feedback sampling point, for preventing the current from flowing reversely to the current detector.

6. The power supply management system according to claim 1, characterized in that: The current detection module includes at least one of a current transformer, a Hall sensor or a sampling resistor.

7. The power supply management system according to claim 5, characterized in that: The current detection module also includes: A capacitor, a first end of the capacitor is connected to the cathode of the diode, and a second end of the capacitor is grounded.

8. A power supply management method, characterized in that: The method is performed by the power supply management system according to any one of claims 1 to 7, and comprises: Acquiring status information of the onboard power supply, and determining a power supply mode of the tethered drone according to the status information; If the state of the onboard power supply is normal, the onboard power supply supplies power to the tethered drone and charges the lithium battery; If the state of the onboard power supply is abnormal, the tethered drone is powered by the lithium battery.

9. The power supply management method according to claim 8, characterized in that: The step of charging the lithium battery comprises: Detecting the charging current of the lithium battery and adjusting the output voltage of the onboard power supply according to the charging current; If the lithium battery has no charging current, the onboard power supply is kept at a constant voltage to power the tethered drone; If the lithium battery has a charging current, the output voltage of the onboard power supply is reduced according to the charging current.

10. A tethered drone, characterized in that: It includes the power supply management system described in any one of claims 1-7.

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