CN209448466U - A kind of charging circuit and charging equipment - Google Patents

A kind of charging circuit and charging equipment Download PDF

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Publication number
CN209448466U
CN209448466U CN201920243987.8U CN201920243987U CN209448466U CN 209448466 U CN209448466 U CN 209448466U CN 201920243987 U CN201920243987 U CN 201920243987U CN 209448466 U CN209448466 U CN 209448466U
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power
interface
resistance
connect
switch
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李洪权
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Guangzhou Xaircraft Technology Co Ltd
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Guangzhou Xaircraft Technology Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The utility model discloses a kind of charging circuit and charging equipments, in the charge circuit, the output end of power switching module is provided with the first power interface connecting with solar panel, connect with USB power supply second source interface and out-put supply, power switching module controls the first power interface and/or second source interface is connected to the output;Power tracking module is connect with the first power interface, and the output end of power tracking module is connect with charge management module, for detecting the connection status and output voltage setting signal of the first power interface;Charge management module is connect with power switching module and power tracking module respectively, and supply voltage is arranged according to voltage-set signal to power to charging interface in charge management module.Solar panel can be used in the charging circuit or USB power supply charges to lithium battery, is charged using other power supplys to lithium battery in time in solar panel electricity shortage, ensure that the electricity consumption of the electrical equipments such as unmanned plane, earth station.

Description

A kind of charging circuit and charging equipment
Technical field
The utility model relates to charging technique field more particularly to a kind of charging circuits and charging equipment.
Background technique
With the development of electronic technology, daily life electronic product develops to trend toward miniaturization, and electronic product use can fill The lithium battery of electricity is powered, and user experience can be improved convenient for lithium battery charging.
For the unmanned plane of lithium battery power supply, since unmanned plane operation outdoors can use solar-electricity far from power grid Pond plate is that the lithium battery of unmanned plane charges.However, small-sized solar solar panel power limited and influenced by weather, sunlight not Charge power is small under sufficient rainy weather operating condition, and considers the photoelectric conversion efficiency of solar panel, solar-electricity The output voltage of pond plate is usually relatively high, and it is lithium electricity that a high-voltage charging interface, which is only arranged, using solar panel in charging circuit Pond charging, when there is solar panel long-time electricity shortage, causes lithium battery that cannot charge in time, unmanned plane, ground The electrical equipments such as stand can not work normally.
Utility model content
The purpose of the utility model embodiment is: a kind of charging circuit and charging equipment is provided, to solve existing charging Circuit is only capable of using solar panel being lithium battery charging, when there is solar panel long-time electricity shortage, causes The problem of lithium battery cannot charge in time, and the electrical equipments such as unmanned plane, earth station can not work normally.
For this purpose, the utility model embodiment uses following technical scheme:
In a first aspect, providing a kind of charging circuit, including power switching module, power tracking module and Charge Management mould Block,
The power switching module is provided with the first power interface for connecting with solar panel, is used for and USB The second source interface that power supply connects and the output end for out-put supply, the power switching module are described for controlling First power interface and/or the second source interface are connected to the output end;
The input terminal of the power tracking module is connect with first power interface, the output of the power tracking module End is connect with the charge management module, for detecting the connection status and output voltage setting signal of first power interface To the charge management module;
The charge management module is provided with charging interface, the charge management module respectively with the power switching module Output end connected with the output end of the power tracking module, the setting of voltage for being exported according to the power tracking module Supply voltage is arranged to power to the charging interface in signal.
Optionally, the power switching module includes first switch tube, second switch, first resistor and second resistance,
The input terminal of the first switch tube is connect with first power interface, and the control terminal of the first switch tube is logical Cross the first resistor ground connection, the common end and the second source of the control terminal of the first switch tube and the first resistor Interface connection;
The input terminal of the second switch is connect with the second source interface, and the control terminal of the second switch is logical Cross the second resistance ground connection, the common end and first power supply of the control terminal of the second switch and the second resistance Interface connection;
The output end of the first switch tube and the output end of the second switch connect and compose the power switching mould The output end of block.
Optionally, first power interface and the second source interface are grounded by shunt capacitance.
Optionally, the first switch tube and the second switch are PMOS tube.
Optionally, the power tracking module includes triode, reference power source, signal generation power supply, 3rd resistor, the 4th Resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and switch unit,
The switch unit includes input terminal, ground terminal, the first output end and second output terminal,
First power interface is connect by the 3rd resistor with the base stage of the triode, and the reference power source is logical It crosses the 7th resistance to connect with the collector of the triode, the emitter ground connection of the triode, the collection of the triode Electrode is connect with the input terminal of the switch unit, and described 5th resistance one end generates power supply by the 8th resistance and the signal Connection, the other end connect with the first output end of the switch unit, described 6th resistance one end pass through the 8th resistance with it is described Signal generates power supply connection, and the other end is connect with the second output terminal of the switch unit, the 8th resistance, the 5th electricity The common end of resistance and the 6th resistance constitutes the output end of the power tracking module;
The switch unit is when first power interface accesses external power supply, the ground terminal connection of the switch unit First output end, when first power interface does not access external power supply, the ground terminal of the switch unit connects institute State second output terminal.
Optionally, the reference power source is grounded by shunt capacitance.
Optionally, the charge management module includes supply voltage setting unit, the supply voltage setting unit setting There is supply voltage that pin is set, the supply voltage setting pin is connect with the output end of the power tracking module.
Optionally, the charge management module further include switch unit, charging current setting unit, battery identification unit, At least one of over-current protecting unit and short-circuit protection unit.
Second aspect, provides a kind of charging equipment, and the charging equipment includes what the utility model any embodiment provided Charging circuit.
The charging circuit of the utility model embodiment, power switching module is provided with the first power interface and second source connects Mouthful and the first power interface can be controlled and/or second source interface is connected to charge management module, while function can be passed through Rate tracing module detects the connection status of the first power interface and output voltage setting signal is to charge management module, in the first electricity When source interface connects external power supply at least one power interface in second source interface, charge management module can be according to function The supply voltage of the voltage-set signal setting access power supply of rate tracing module output is to power to charging interface, so that charging electricity Solar panel can be used in road or USB power supply charges to lithium battery, solves existing charging circuit and is only capable of making It is the problem of lithium battery charges with solar panel, it can be using other power supplys to lithium in solar panel electricity shortage Battery charges in time, ensure that the electrical equipments such as unmanned plane, earth station work normally.
Detailed description of the invention
The utility model is described in further detail below according to drawings and examples.
Fig. 1 is a kind of connection block diagram of charging circuit of the utility model embodiment.
Fig. 2 is a kind of circuit diagram of charging circuit of the utility model embodiment.
In figure:
10- power switching module;The first power interface of 101-;102- second source interface;20- power tracking module;30- Charge management module;301- charging interface;40- solar panel;50-USB power supply;60- battery.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer, It is described in further detail below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that described reality Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, It is practical new to belong to this for those skilled in the art's every other embodiment obtained without creative efforts The range of type protection.
In the description of the present invention, unless otherwise clearly defined and limited, term " connected ", " connection ", " Gu It is fixed " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or integral;It can be mechanical connect It connects, is also possible to be electrically connected;It can be directly connected, can also can be in two elements indirectly connected through an intermediary The interaction relationship of the connection in portion or two elements.For the ordinary skill in the art, it can be managed with concrete condition Solve the concrete meaning of above-mentioned term in the present invention.
Fig. 1 is a kind of connection block diagram of charging circuit of the utility model embodiment.
As shown in Figure 1, charging circuit provided by the embodiment of the utility model includes power switching module 10, powerinjected method mould Block 20 and charge management module 30.
Wherein, power switching module 10 is provided with the first power interface 101, second source interface 102 and output end, is used for It controls the first power interface 101 and/or second source interface 102 is connected to the output end of power switching module 10.
The input terminal of power tracking module 20 is connect with the first power interface 101, the output end of power tracking module 20 with Charge management module 30 connects, and the connection status and output voltage setting signal for detecting the first power interface 101 extremely charge Management module 30.
Charge management module 30 is provided with charging interface 301, charge management module 30 respectively with power switching module 10 Output end is connected with the output end of power tracking module 20, and the voltage-set signal for being exported according to power tracking module 20 is set Supply voltage is set to power to charging interface 301.
In practical applications, the first power interface 101 can be solar panel power interface, second source interface 102 can be USB power connector, and the first power interface 101 can connect solar panel 40, and supply voltage can be 12V, second source interface 102 can connect USB power supply, and supply voltage can be 5V, and charging interface 301 can connect Battery 60, the battery 60 can be rechargeable lithium battary or other rechargeable batteries.
Certainly, the first power interface 101 is not limited only to be solar battery plate interface, and second source interface 102 is not only It is only limitted to USB power connector, for example, the first power interface 101 can be high voltage supply interface, second source interface 102 can be with It is low-voltage power supply interface, mesohigh and low pressure are that in contrast, can be realized the first power interface 101 and second source interface 102 can access different form power supply, different power voltage, and the utility model embodiment is to the first power interface 101 and second source interface 102 access power supply it is without restriction.
When at least one of the first power interface 101 and second source interface 102 connect corresponding external power supply, supply The corresponding power interface of electric switching module 10 is connected to the output end of power switching module 10, provides corresponding supply by output end Piezoelectric voltage to charge management module 30, while power tracking module 20 detects whether the first power interface 101 has external power supply to connect Enter, when the first power interface 101 does not access solar panel 40, the output setting voltage of power tracking module 20 is second The voltage-set signal of the voltage for the USB power supply 50 that power interface 102 connects, when the first power interface 101 accesses the sun When energy solar panel 40, the output setting voltage of power tracking module 20 is the voltage-set signal of the voltage of solar panel 40, When the first power interface 101 connects solar panel 40 and second source interface 102 connects USB power supply 50, by What it is in the connection of power tracking module 20 is the first power interface 101, and second source interface 102 is not involved in powerinjected method, and power chases after The output setting voltage of track module 20 is the voltage-set signal of the voltage of solar panel 40.
Meanwhile phase is arranged after the voltage-set signal for receiving the output of power tracking module 20 in charge management module 30 The charging voltage answered is powered to be powered to battery 60 charging interface 301.
The charging circuit of the utility model embodiment, setting is there are two power interface and is provided with power tracking module pair Interface is detected, and is carried out with exporting corresponding voltage-set signal to charge management module setting supply voltage to charging interface Power supply solves existing so that solar panel can be used for charging circuit or USB power supply charges to lithium battery Charging circuit is only capable of using solar panel being the problem of lithium battery charges, and can adopt in solar panel electricity shortage It is charged in time with other power supplys to lithium battery, ensure that the electrical equipments such as unmanned plane, earth station work normally.
As shown in Fig. 2, in the preferred embodiment of the utility model, power switching module 10 include first switch tube Q1, Second switch Q2, first resistor R1 and second resistance R2.
Wherein, the input terminal of first switch tube Q1 is connect with the first power interface 101 (VIN), the control of first switch tube Q1 End processed is grounded by first resistor R1, and the control terminal of first switch tube Q1 and the common end of first resistor R1 connect with second source Mouth 102 (VBUS) connection.The input terminal of second switch Q2 is connect with second source interface 102 (VBUS), second switch Q2 Control terminal be grounded by second resistance R2, the common end and the first power supply of the control terminal of second switch Q2 and second resistance R2 Interface 101 (VIN) connection.
The output end of first switch tube Q1 and the output end of second switch Q2 connect and compose the defeated of power switching module 10 Outlet.
Optionally, the first power interface 101 (VIN) and second source interface 102 (VBUS) pass through the first bypass electricity respectively Hold C1, the second shunt capacitance C2 ground connection, the first power interface can be improved by the first shunt capacitance C1, the second shunt capacitance C2 The stability of 101 (VIN) and the voltage of second source interface 102 (VBUS) input.
Preferably, the first switch tube Q1 and second switch Q2 is PMOS tube.
Below with the solar panel 40 of the first power interface 101 (VIN) connection 12V, second source interface 102 (VBUS) connect 5V USB power supply 50 be illustrate power switching module 10 working principle it is as follows:
When the solar panel 40 of only the first power interface 101 (VIN) connection 12V, i.e. the first power interface 101 It (VIN) is 12V, second source interface 102 (VBUS) is 0V, and the pole G (grid) voltage of first switch tube Q1 is low level, the pole D (drain electrode), the pole S (source electrode) bidirectionally conductive, while the G of second switch Q2 extremely high level, the pole S are not turned on to the pole D.
When only second source interface 102 (VBUS) connection USB power supply 50, i.e. second source interface 102 It (VBUS) is 5V, the first power interface 101 (VIN) is 0V, and the G pole tension of first switch tube Q1 is height, and the pole S is not led to the pole D It is logical;The G extremely low level of second switch Q2 simultaneously, the pole D, the pole S bidirectionally conductive.
When the first power interface 101 (VIN) connects solar panel 40 and second source interface 102 (VBUS) even When connecing USB power supply 50, i.e. the first power interface 101 (VIN) be 12V, second source interface 102 (VBUS) be 5V, first The G pole tension of switching tube Q1 is high level, the pole D of first switch tube Q1 to the pole S one-way conduction;Second source interface 102 simultaneously (VBUS) G pole tension is high level, and the pole D of second switch Q2 is to the pole S one-way conduction, and due to first switch tube Q1 and the Two switching tube Q2 are all in one-way conduction, therefore the power supply of the first power interface 101 (VIN) and second source interface 102 (VBUS) It does not influence each other mutually.
Certainly, although using PMOS tube as switching tube in above-mentioned example and Fig. 2, those skilled in the art in practical applications Other switching tubes can also be used, the utility model embodiment is without restriction to this.
As shown in Fig. 2, power tracking module 20 may include triode Q3, reference power source VREF, signal generation power supply VCC, 3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and switch Unit U1.
Wherein, switch unit U1 can be a chip with switching function comprising input terminal IN, ground terminal COM, the One output end NC and second output terminal NO.
First power interface 101 (VIN) is connect by 3rd resistor R3 with the base stage of triode Q3, and reference power source VREF is logical Cross the 7th resistance R7 to connect with the collector of triode Q3, the emitter of triode Q3 ground connection, the collector of triode Q3 with open The input terminal IN connection of unit U1 is closed, the 5th one end resistance R5 generates power supply VCC with signal by the 8th resistance R8 and connect, another End is connect with the first output end NC of switch unit U1, and the 6th one end resistance R6 generates power supply by the 8th resistance R8 and signal VCC connection, the other end are connect with the second output terminal NO of switch unit U1, the 8th resistance R8, the 5th resistance R5 and the 6th electricity The common end for hindering R6 constitutes the output end of power tracking module 20.
The power tracking module 20 of the utility model embodiment, switch unit U1 connect in the first power interface 101 (VIN) When entering external power supply (such as access solar panel 40), ground terminal COM connection the first output end NC of switch unit U1, When the first power interface 101 (VIN) does not access external power supply, the ground terminal COM connection second output terminal NO of switch unit U1.
Optionally, reference power source VREF is grounded by third shunt capacitance C3, and ginseng can be improved by shunt capacitance ground connection Examine the stability of power supply VREF.
Below to illustrate the process of 20 output voltage setting signal of power tracking module:
When only second source interface 102 (VBUS) access USB power supply 50, the first power interface 101 (VIN) is 0, triode Q3 is not turned on, and the input terminal IN of switch unit U1 is high level, and the ground terminal COM connection second of switch unit U1 is defeated Outlet NO, the 5th resistance R5 ground connection, the 5th resistance R5 with and the 8th resistance R8 composition bleeder circuit, one voltage signal of output To charge management module 30, it is second source interface 102 which, which makes charge management module 30 that supply voltage be arranged, (VBUS) the voltage 5V of USB power supply 50 is accessed.
When only the first power interface 101 (VIN) accesses solar panel 40, the first power interface 101 (VIN) For 12V, triode Q3 conducting, the input terminal IN of switch unit U1 is low level, the ground terminal COM connection first of switch unit U1 Output end NC, the 6th resistance R6 ground connection, the 6th resistance R6 with and the 8th resistance R8 composition bleeder circuit, one voltage of output believes Number to charge management module 30, it is the first power interface 101 which, which makes charge management module 30 that supply voltage be arranged, (VIN) the voltage 12V of solar panel 40 is accessed.
When the first power interface 101 (VIN) connects solar panel 40 and second source interface 102 (VBUS) even When connecing USB power supply 50, because second source interface 102 (VBUS) is not involved in control, with only the first power interface 101 (VIN) process when solar panel 40 is accessed, output setting supply voltage is the electricity of the voltage 12V of solar panel 40 Press setting signal.
In practical applications, the 5th resistance R5 and the 6th resistance R6 take different resistance values, it can export different electricity It presses signal as voltage-set signal, external power supply has been accessed with the power interface for representing different.
As shown in Fig. 2, charge management module 30 includes supply voltage setting unit U2, supply voltage setting unit U2 setting There is supply voltage that pin MPPSET is set, supply voltage setting pin MPPSET is connect with the output end of power tracking module 20, It is connect with the common end of the 5th resistance R5, the 6th resistance R6 and the 8th resistance R8, so that supply voltage setting unit U2 can be with Supply voltage is set according to the voltage-set signal received, such as can be the voltage signal setting confession for receiving varying level Piezoelectric voltage is the voltage of solar panel 40 or USB power supply 50.
Optionally, charge management module 30 further includes switch unit, charging current setting unit, battery identification unit, mistake Flow at least one of protection location and short-circuit protection unit.
As shown in Fig. 2, in an alternative embodiment, charge management module 30 further includes charging circuit setting unit 302, Charging circuit setting unit 302 is connected between charging interface 301 and the output end of power switching module 10, and electric with power supply Setting unit U2 connection is pressed, charging circuit setting unit is controlled when different power voltage is arranged in supply voltage setting unit U2 302 export different charging currents to charging interface 301.
The utility model embodiment additionally provides a kind of charging equipment, which includes that the utility model embodiment is appointed Charging circuit described in one.
In the description of this specification, the description of reference term " embodiment ", " example " etc. means to combine the embodiment Or example particular features, structures, materials, or characteristics described are contained at least one embodiment or example of the utility model In.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this narrating mode of specification be only be to understand device, those skilled in the art should It considers the specification as a whole, the technical solutions in the embodiments can also be appropriately combined, and forming those skilled in the art can With the other embodiments of understanding.
Technical principle of the utility model has been described above with reference to specific embodiments.These descriptions are intended merely to explain this reality With novel principle, and it cannot be construed to the limitation to scope of protection of the utility model in any way.Based on the explanation herein, Those skilled in the art, which does not need to pay for creative labor, can associate with other specific implementation modes of this utility model, These modes are fallen within the protection scope of the utility model.

Claims (9)

1. a kind of charging circuit, which is characterized in that including power switching module, power tracking module and charge management module,
The power switching module is provided with the first power interface for connecting with solar panel, be used for and USB powers The second source interface that power supply connects and the output end for out-put supply, the power switching module is for controlling described first Power interface and/or the second source interface are connected to the output end;
The input terminal of the power tracking module is connect with first power interface, the output end of the power tracking module with Charge management module connection, the connection status and output voltage setting signal for detecting first power interface are to institute State charge management module;
The charge management module is provided with charging interface, and the charge management module is defeated with the power switching module respectively Outlet is connected with the output end of the power tracking module, the voltage-set signal for being exported according to the power tracking module Supply voltage is set to power to the charging interface.
2. charging circuit as described in claim 1, which is characterized in that the power switching module includes first switch tube, Two switching tubes, first resistor and second resistance,
The input terminal of the first switch tube is connect with first power interface, and the control terminal of the first switch tube passes through institute State first resistor ground connection, the common end and the second source interface of the control terminal of the first switch tube and the first resistor Connection;
The input terminal of the second switch is connect with the second source interface, and the control terminal of the second switch passes through institute State second resistance ground connection, the common end and first power interface of the control terminal of the second switch and the second resistance Connection;
The output end of the first switch tube and the output end of the second switch connect and compose the power switching module Output end.
3. charging circuit as claimed in claim 2, which is characterized in that first power interface and the second source interface It is grounded by shunt capacitance.
4. charging circuit as claimed in claim 3, which is characterized in that the first switch tube and the second switch are PMOS tube.
5. charging circuit as claimed in claim 1 or 2, which is characterized in that the power tracking module includes triode, reference Power supply, signal generate power supply, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and open Unit is closed,
The switch unit includes input terminal, ground terminal, the first output end and second output terminal,
First power interface is connect by the 3rd resistor with the base stage of the triode, and the reference power source passes through institute It states the 7th resistance to connect with the collector of the triode, the emitter ground connection of the triode, the collector of the triode It is connect with the input terminal of the switch unit, described 5th resistance one end generates power supply by the 8th resistance and the signal and connects It connects, the other end is connect with the first output end of the switch unit, and described 6th resistance one end passes through the 8th resistance and the letter Number power supply connection is generated, the other end connect with the second output terminal of the switch unit, the 8th resistance, the 5th resistance And the common end of the 6th resistance constitutes the output end of the power tracking module;
The switch unit is when first power interface accesses external power supply, described in the ground terminal connection of the switch unit First output end, when first power interface does not access external power supply, the ground terminal of switch unit connection described the Two output ends.
6. charging circuit as claimed in claim 5, which is characterized in that the reference power source is grounded by shunt capacitance.
7. charging circuit as claimed in claim 1 or 2, which is characterized in that the charge management module includes that supply voltage is set Set unit, the supply voltage setting unit is provided with supply voltage setting pin, the supply voltage setting pin with it is described The output end of power tracking module connects.
8. charging circuit as claimed in claim 1 or 2, which is characterized in that the charge management module further include switch unit, At least one of charging current setting unit, battery identification unit, over-current protecting unit and short-circuit protection unit.
9. a kind of charging equipment, which is characterized in that the charging equipment includes such as the described in any item charging electricity of claim 1-8 Road.
CN201920243987.8U 2019-02-26 2019-02-26 A kind of charging circuit and charging equipment Active CN209448466U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920243987.8U CN209448466U (en) 2019-02-26 2019-02-26 A kind of charging circuit and charging equipment

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Application Number Priority Date Filing Date Title
CN201920243987.8U CN209448466U (en) 2019-02-26 2019-02-26 A kind of charging circuit and charging equipment

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110816879A (en) * 2019-10-28 2020-02-21 西北工业大学 Comprehensive energy detection system based on solar unmanned aerial vehicle
CN116488318A (en) * 2023-04-11 2023-07-25 深圳市龙之源科技股份有限公司 Power supply device and power supply device control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110816879A (en) * 2019-10-28 2020-02-21 西北工业大学 Comprehensive energy detection system based on solar unmanned aerial vehicle
CN110816879B (en) * 2019-10-28 2022-09-06 西北工业大学 Comprehensive energy detection system based on solar unmanned aerial vehicle
CN116488318A (en) * 2023-04-11 2023-07-25 深圳市龙之源科技股份有限公司 Power supply device and power supply device control method

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