Centralized charging device for storage batteries of unmanned aerial vehicle

Abstract

The utility model relates to a centralized charging device for storage batteries of an unmanned aerial vehicle. The centralized charging device comprises a plurality of sub-charging circuits, wherein each sub-charging circuit comprises a storage battery, the plurality of sub-charging circuits are connected with the charging power supply circuit, the battery communication circuit is connected with the plurality of storage batteries, and the battery communication circuit is also connected with the main control circuit; the sub-charging circuit controls the charging power supply circuit to charge or stop charging the storage battery and is controlled by the charging control circuit; the main control circuit communicates with any storage battery through the battery communication circuit to obtain the state information of the storage battery and judge whether the storage battery is in place or not; the main control circuit controls the corresponding sub-charging circuit to charge or stop charging the corresponding storage battery through the charging control circuit according to the voltage or the charging current of the storage battery and whether the storage battery is in place or not; therefore, independent charging control of a plurality of storage batteries is supported, intelligent charging of the storage batteries is realized by reading the state information of the storage batteries, the intelligent degree is greatly improved, and the circuit is simple and small in size.

Description

Technical Field

[0001] The utility model relates to the technical field of centralized battery charging circuits, and more specifically to a centralized battery charging device for unmanned aerial vehicles. Background Art

[0002] Most of the existing centralized charging devices for drone batteries can only charge one or two or three batteries, and cannot independently control the charging of a certain battery, and cannot read the battery status information. There are often problems such as overcharging, which seriously affects the service life of the battery and can no longer meet people's usage needs. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art, a centralized charging device for unmanned aerial vehicle batteries is provided, which supports independent charging control of multiple batteries and reads battery status information to perform intelligent charging of the batteries.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A centralized battery charging device for an unmanned aerial vehicle is constructed, comprising a plurality of sub-charging circuits; wherein the sub-charging circuits comprise batteries, the plurality of sub-charging circuits are all connected to a charging power supply circuit, the sub-charging circuits control the charging power supply circuit to charge or stop charging the batteries and are controlled by a charging control circuit;

[0006] The battery communication circuit is connected to the plurality of batteries respectively, and the battery communication circuit is also connected to the main control circuit. The main control circuit communicates with any one of the batteries through the battery communication circuit to obtain battery status information and determine whether the battery is in place;

[0007] The battery status information includes: battery voltage and charging current; the main control circuit controls the corresponding sub-charging circuit to charge or stop charging the corresponding battery through the charging control circuit according to the battery voltage or the charging current and whether the battery is in place.

[0008] The centralized battery charging device for unmanned aerial vehicles of the utility model, wherein the main control circuit is also connected to a display circuit, and the display circuit displays the battery status information; the main control circuit is a microcontroller;

[0009] The battery status information also includes: one or more of: SN code, battery capacity, number of cycles, and battery power percentage.

[0010] In the centralized battery charging device for unmanned aerial vehicles described in the utility model, the main control circuit is also connected to a temperature detection circuit and a plurality of heat dissipation control circuits;

[0011] The temperature detection circuit detects the current temperature of the centralized battery charging device for the unmanned aerial vehicle, and the main control circuit controls one or more heat dissipation control circuits to operate according to the current temperature to dissipate heat or stop dissipating heat for the centralized battery charging device for the unmanned aerial vehicle.

[0012] The centralized battery charging device for unmanned aerial vehicles of the utility model, wherein the plurality of sub-charging circuits at least include: a first group of sub-charging circuits and a second group of sub-charging circuits;

[0013] The charging power supply circuit comprises: a first main charging circuit, a second main charging circuit, a first constant current source and a second constant current source; the first main charging circuit controls the first constant current source to supply power to or stop supplying power to the first group of sub-charging circuits, and the second main charging circuit controls the second constant current source to supply power to or stop supplying power to the second group of sub-charging circuits;

[0014] The first main charging circuit is connected to the first constant current source and the first group of sub-charging circuits respectively, and the second main charging circuit is connected to the second constant current source and the second group of sub-charging circuits respectively;

[0015] The main charging circuit includes a switch, and the switch controls the main charging circuit to operate or stop.

[0016] The centralized battery charging device for unmanned aerial vehicles of the utility model, wherein the sub-charging circuit comprises: a first field effect transistor;

[0017] The source of the first field effect transistor is the power supply input terminal of the sub-charging circuit, and the drain is respectively connected to pins 10, 11, and 12 of the battery;

[0018] The source of the first field effect transistor is connected to a first resistor and the gate is connected to a second resistor, the other end of the first resistor is connected to the gate of the first field effect transistor, and the other end of the second resistor is connected to the collector of the transistor; the emitter of the transistor is grounded and the base is connected to a third resistor and a fourth resistor, the other end of the third resistor is the control end of the sub-charging circuit, and the other end of the fourth resistor is grounded.

[0019] The centralized battery charging device for unmanned aerial vehicles of the utility model, wherein the main charging circuit further comprises: a second field effect transistor and a third field effect transistor;

[0020] The drain of the second field effect transistor is the negative input terminal of the main charging circuit and the source is connected to the source of the third field effect transistor. The drain of the third field effect transistor is the negative output terminal of the main charging circuit.

[0021] The gate of the second field effect transistor is connected to the gate of the third field effect transistor and is also connected to the fifth resistor, the sixth resistor and the cathode of the voltage-stabilizing diode. The anode of the voltage-stabilizing diode and the other end of the fifth resistor are both connected to the source of the second field effect transistor. The other end of the sixth resistor is connected to the switch. The other end of the switch is connected to the cathode of the diode. The anode of the diode is the positive input terminal of the main charging circuit.

[0022] The centralized battery charging device for unmanned aerial vehicles of the utility model, wherein the positive output end of the first constant current source is respectively connected to the positive input end of the first main charging circuit and the power supply input end of the first group of sub-charging circuits, and the negative output end is connected to the negative output end of the first main charging circuit, and the pins 1 and 2 of the batteries of the first group of sub-charging circuits are both connected to the negative input end of the first main charging circuit;

[0023] The positive output end of the second constant current source is respectively connected to the positive input end of the second main charging circuit and the power supply input end of the second group of sub-charging circuits, and the negative output end is connected to the negative output end of the second main charging circuit, and the 1st pin and the 2nd pin of the battery of the second group of sub-charging circuits are both connected to the negative input end of the second main charging circuit.

[0024] In the centralized battery charging device for unmanned aerial vehicles of the utility model, the charging power supply circuit is further connected to a first power supply circuit and a second power supply circuit;

[0025] The positive input terminal of the first power supply circuit and the positive input terminal of the second power supply circuit are respectively connected to the cathode of the diode of the first main charging circuit and the cathode of the diode of the second main charging circuit; the negative input terminal of the first power supply circuit and the negative input terminal of the second power supply circuit are respectively connected to the negative input terminal of the first main charging circuit and the negative input terminal of the second main charging circuit;

[0026] The first power supply circuit steps down and outputs a first direct current to provide power supply for the main control circuit, the display circuit, the temperature detection circuit, the heat dissipation control circuit, the charging control circuit and the battery communication circuit; the first power supply circuit is respectively connected to the main control circuit, the display circuit, the temperature detection circuit, the heat dissipation control circuit, the charging control circuit and the battery communication circuit;

[0027] The second power supply circuit outputs a second direct current at a reduced voltage to provide power supply for the plurality of heat dissipation control circuits, and the second power supply circuit is connected to the heat dissipation control circuit; the heat dissipation control circuit includes a heat dissipation fan, and the heat dissipation control circuit controls the heat dissipation fan to dissipate heat or stop dissipating heat for the centralized battery charging device for the unmanned aerial vehicle;

[0028] The positive output terminal and the negative output terminal of the first power supply circuit cooperate to output the first direct current, the positive output terminal and the negative output terminal of the second power supply circuit cooperate to output the second direct current, and the negative output terminal of the first power supply circuit and the negative output terminal of the second power supply circuit are both grounded.

[0029] The centralized battery charging device for unmanned aerial vehicles of the utility model, wherein the charging control circuit comprises: a first shift register and a second shift register, the VCC end of the first shift register and the VCC end of the second shift register are both connected to the positive output end of the first power supply circuit, and the GND end of the first shift register and the GND end of the second shift register are both grounded;

[0030] The RCLK, SRCLK and G terminals of the first shift register are connected one-to-one with the RCLK, SRCLK and G terminals of the second shift register in sequence, and then connected one-to-one with the PB11, PB2 and PB15 terminals of the microcontroller; the SDI terminal of the first shift register is connected with the PB10 terminal of the microcontroller and the SDO terminal is connected with the SDI terminal of the second shift register;

[0031] The QA, QB, QC, QD, QE, QF, QG, and QH terminals of the first shift register are connected one-to-one to the control terminals of the first group of sub-charging circuits; the QA, QB, QC, QD, QE, QF, QG, and QH terminals of the second shift register are connected one-to-one to the control terminals of the second group of sub-charging circuits.

[0032] The centralized battery charging device for unmanned aerial vehicles of the utility model, wherein the battery communication circuit comprises: a first analog multiplexer and a second analog multiplexer;

[0033] The SO terminal, S1 terminal, S2 terminal, S3 terminal, and EN terminal of the first analog multiplexer are connected one-to-one with the SO terminal, S1 terminal, S2 terminal, S3 terminal, and EN terminal of the second analog multiplexer in sequence, and then connected one-to-one with the PA4 terminal, PA5 terminal, PA6 terminal, PA7 terminal, and PB0 terminal of the microcontroller; the CI / O terminal of the first analog multiplexer is connected to the PA3 terminal of the microcontroller, and the CI / O terminal of the second analog multiplexer is connected to the PA2 terminal of the microcontroller;

[0034] The I0, I1, I2, I3, I4, I5, I6, I7, I8, I9, I10 and I11 terminals of the first analog multiplexer are connected one-to-one with the 4 pins of the batteries of the first group of sub-charging circuits and the 4 pins of the batteries of the second group of sub-charging circuits; the I0, I1, I2, I3, I4, I5, I6, I7, I8, I9, I10 and I11 terminals of the second analog multiplexer are connected one-to-one with the 5 pins of the batteries of the first group of sub-charging circuits and the 5 pins of the batteries of the second group of sub-charging circuits.

[0035] The beneficial effects of the utility model are as follows: the sub-charging circuit controls the charging power circuit to charge or stop charging the battery and is controlled by the charging control circuit; the main control circuit communicates with any battery through the battery communication circuit to obtain the battery status information and judge whether the battery is in place; the main control circuit controls the corresponding sub-charging circuit to charge or stop charging the corresponding battery through the charging control circuit according to the battery voltage or charging current and whether the battery is in place; thereby supporting independent charging control of multiple batteries and reading the battery status information to perform intelligent charging of the battery, which greatly improves the degree of intelligence, and the circuit is simple and small in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0037] Figure 1 This is a circuit schematic diagram of a sub-charging circuit of a centralized battery charging device for unmanned aerial vehicles in a preferred embodiment of the utility model;

[0038] Figure 2 This is a circuit schematic diagram of the main charging circuit of the centralized battery charging device for unmanned aerial vehicles of a preferred embodiment of the utility model;

[0039] Figure 3 This is a circuit schematic diagram of a charging control circuit of a centralized battery charging device for unmanned aerial vehicles in a preferred embodiment of the utility model;

[0040] Figure 4 This is a circuit schematic diagram of a battery communication circuit of a centralized battery charging device for unmanned aerial vehicles according to a preferred embodiment of the utility model;

[0041] Figure 5This is a circuit schematic diagram of the main control circuit of the centralized battery charging device for unmanned aerial vehicles of the preferred embodiment of the utility model;

[0042] Figure 6 This is a circuit schematic diagram of a display circuit of a centralized battery charging device for unmanned aerial vehicles in a preferred embodiment of the utility model;

[0043] Figure 7 This is a circuit schematic diagram of temperature detection of a centralized battery charging device for unmanned aerial vehicles in a preferred embodiment of the utility model;

[0044] Figure 8 This is a circuit schematic diagram of a heat dissipation control circuit of a centralized battery charging device for unmanned aerial vehicles according to a preferred embodiment of the utility model;

[0045] Fig. 9 This is a circuit schematic diagram of the first power supply circuit of the centralized battery charging device for unmanned aerial vehicles of a preferred embodiment of the utility model;

[0046] Fig.10 It is a circuit schematic diagram of the second power supply circuit of the centralized battery charging device for unmanned aerial vehicles of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0048] The centralized battery charging device for unmanned aerial vehicles of the preferred embodiment of the utility model is as follows Figure 1 See also Figures 2 to 10 ; including a plurality of sub-charging circuits 100; wherein the sub-charging circuit 100 includes a battery J6, and the plurality of sub-charging circuits 100 are connected to a charging power supply circuit (such as Figure 2 As shown), the sub-charging circuit 100 controls the charging power circuit to charge or stop charging the battery J6 and is controlled by the charging control circuit 200; further, the battery J6 is detachably connected to the sub-charging circuit 100 and the charging power circuit, which is convenient to use;

[0049] The battery communication circuit 300 is respectively connected to a plurality of batteries J6, and the battery communication circuit 300 is also connected to the main control circuit 400. The main control circuit 400 communicates with any battery J6 through the battery communication circuit 300 to obtain the battery J6 status information and determine whether the battery J6 is in place; preferably, the main control circuit 400 is also connected to a communication circuit (not shown in the figure), and the communication circuit communicates with external devices via USB bus, RS485 bus, TTL serial port, and CAN bus to meet different usage requirements and further improve the degree of intelligence;

[0050] The state information of the battery J6 includes: the voltage and charging current of the battery J6; the main control circuit 400 controls the corresponding sub-charging circuit 100 to charge or stop charging the corresponding battery J6 through the charging control circuit 200 according to the voltage or charging current of the battery J6 and whether the battery J6 is in place; wherein, preferably, the battery J6 with a low battery voltage is charged to the same battery voltage as other batteries J6 and then starts parallel charging to improve the charging efficiency as a whole;

[0051] The sub-charging circuit 100 controls the charging power circuit to charge or stop charging the battery J6 and is controlled by the charging control circuit 200; the main control circuit 400 communicates with any battery J6 through the battery communication circuit 300 to obtain the battery J6 status information and determine whether the battery J6 is in place; the main control circuit 400 controls the corresponding sub-charging circuit 100 to charge or stop charging the corresponding battery J6 through the charging control circuit 200 according to the battery J6 voltage or charging current and whether the battery J6 is in place; thereby supporting independent charging control of multiple batteries J6 and reading the battery J6 status information to intelligently charge the battery J6, which greatly improves the degree of intelligence, and the circuit is simple and small in size.

[0052] like Figure 1 and Figure 5 as well as Figure 6 As shown, the main control circuit 400 is also connected to a display circuit 500, and the display circuit 500 displays the status information of the battery J6, wherein the display circuit 500 includes an LED digital tube display screen J22; the main control circuit 400 is a microcontroller U1, which is small in size and low in cost; wherein the microcontroller U1 is also connected to a crystal oscillator Y1 to meet the operation requirements;

[0053] The battery J6 status information also includes: one or more of the SN code, the battery J6 capacity, the number of cycles, and the power percentage; it is convenient to check the battery J6 status information.

[0054] like Figure 5 and Figure 7 as well as Figure 8As shown, the main control circuit 400 is also connected to a temperature detection circuit 600 and a plurality of heat dissipation control circuits 700;

[0055] The temperature detection circuit 600 detects the current temperature of the centralized charging device for the UAV battery J6, and the main control circuit 400 controls one or more heat dissipation control circuits 700 to work according to the current temperature, so as to dissipate or stop the heat dissipation of the centralized charging device for the UAV battery J6, thereby realizing intelligent temperature control. Among them, the PB8 and PB9 terminals of the microcontroller U1 are used to control at least two heat dissipation control circuits 700 to work, so as to control the cooling fan J23 to start or stop and adjust the speed. Furthermore, the microcontroller U1 can also be connected to an external digital temperature sensor to detect the temperature at different positions.

[0056] like Figure 1 and Figure 2 As shown, the plurality of sub-charging circuits 100 at least include: a first group of sub-charging circuits 100 and a second group of sub-charging circuits 100; wherein the first group of sub-charging circuits 100 and the second group of sub-charging circuits 100 each include at least six sub-charging circuits 100;

[0057] The charging power supply circuit includes: a first main charging circuit 800, a second main charging circuit 800 and a first constant current source (not shown in the figure) and a second constant current source (not shown in the figure) (i.e.: 1. The charging power supply circuit includes multiple main charging circuits 800, and the multiple main charging circuits 800 include at least the first main charging circuit 800 and the second main charging circuit 800; 2. The charging power supply circuit also includes multiple constant current sources, and the multiple constant current sources include at least the first constant current source and the second constant current source); the first main charging circuit 800 controls the first constant current source to supply power to or stop supplying power to the first group of sub-charging circuits 100, and the second main charging circuit 800 controls the second constant current source to supply power to or stop supplying power to the second group of sub-charging circuits 100;

[0058] The first main charging circuit 800 is respectively connected to the first constant current source and the first group of sub-charging circuits 100, and the second main charging circuit 800 is respectively connected to the second constant current source and the second group of sub-charging circuits 100;

[0059] The main charging circuit 800 includes: a switch (not shown in the figure), which controls the main charging circuit 800 to work or stop, so as to realize manual control to start or stop charging the battery J6;

[0060] Two constant current sources and corresponding two main charging circuits 800 are provided to increase the chargeable power and manually control the start or stop of charging of the battery J6.

[0061] like Figure 1 As shown, the sub-charging circuit 100 includes: a first field effect transistor Q28;

[0062] The source of the first field effect transistor Q28 is the power supply input terminal of the sub-charging circuit 100, and the drain is respectively connected to the pins 10, 11 and 12 of the battery J6;

[0063] The source of the first field effect transistor Q28 is connected to the first resistor R250 and the gate is connected to the second resistor R25. The other end of the first resistor R250 is connected to the gate of the first field effect transistor Q28, and the other end of the second resistor R25 is connected to the collector of the transistor Q7. The emitter of the transistor Q7 is grounded and the base is connected to the third resistor R20 and the fourth resistor R24. The other end of the third resistor R20 is the control end of the sub-charging circuit 100, and the other end of the fourth resistor R24 ​​is grounded. The transistor Q7 controls the operation of the first field effect transistor Q28 to protect the first field effect transistor Q28.

[0064] like Figure 2 As shown, the main charging circuit 800 further includes: a second field effect transistor Q6 and a third field effect transistor Q5;

[0065] The drain of the second field effect transistor Q6 is the negative input terminal of the main charging circuit 800 and the source is connected to the source of the third field effect transistor Q5. The drain of the third field effect transistor Q5 is the negative output terminal of the main charging circuit 800.

[0066] The gate of the second field effect transistor Q6 is connected to the gate of the third field effect transistor Q5 and is also connected to the fifth resistor R16, the sixth resistor R15 and the cathode of the voltage stabilizing diode D3. The anode of the voltage stabilizing diode D3 and the other end of the fifth resistor R16 are both connected to the source of the second field effect transistor Q6. The other end of the sixth resistor R15 is connected to a switch. The other end of the switch is connected to the cathode of a diode D28. The anode of the diode D28 is the anode input terminal of the main charging circuit 800 to prevent current backflow. The second field effect transistor Q6 is used as a switch, the third field effect transistor Q5 is used as anti-reverse connection protection, and the voltage stabilizing diode D3 and the sixth resistor R15 cooperate to stabilize the voltage to prevent the second field effect transistor Q6 and the third field effect transistor Q5 from being burned due to excessive voltage.

[0067] like Figure 1 and Figure 2 As shown, the positive output end of the first constant current source is respectively connected to the positive input end of the first main charging circuit 800 and the power supply input end of the first group of sub-charging circuits 100, and the negative output end is connected to the negative output end of the first main charging circuit 800, and the pin 1 and pin 2 of the battery J6 of the first group of sub-charging circuits 100 are both connected to the negative input end of the first main charging circuit 800;

[0068] The positive output end of the second constant current source is respectively connected to the positive input end of the second main charging circuit 800 and the power supply input end of the second group of sub-charging circuits 100, and the negative output end is connected to the negative output end of the second main charging circuit 800. Pins 1 and 2 of the battery J6 of the second group of sub-charging circuits 100 are both connected to the negative input end of the second main charging circuit 800. The rechargeable power and manual control grouping are used to charge or stop charging the battery J6 to meet different usage requirements.

[0069] like Figures 2 to 10 As shown, the charging power supply circuit is also connected to a first power supply circuit 900 and a second power supply circuit 1000;

[0070] The positive input terminal of the first power supply circuit 900 and the positive input terminal of the second power supply circuit 1000 are respectively connected to the negative electrode of the diode D28 of the first main charging circuit 800 and the negative electrode of the diode D28 of the second main charging circuit 800; the negative input terminal of the first power supply circuit 900 and the negative input terminal of the second power supply circuit 1000 are respectively connected to the negative input terminal of the first main charging circuit 800 and the negative input terminal of the second main charging circuit 800; the anti-reverse connection protection of the first power supply circuit 900 and the second power supply circuit 1000 and the dual constant current source redundant power supply are realized;

[0071] The first power supply circuit 900 steps down and outputs a first direct current to provide power supply for the main control circuit 400, the display circuit 500, the temperature detection circuit 600, the heat dissipation control circuit 700, the charging control circuit 200 and the battery communication circuit 300; the first power supply circuit 900 is respectively connected to the main control circuit 400, the display circuit 500, the temperature detection circuit 600, the heat dissipation control circuit 700, the charging control circuit 200 and the battery communication circuit 300;

[0072] The second power supply circuit 1000 outputs a second direct current at a reduced voltage to provide power supply for multiple heat dissipation control circuits 700, and the second power supply circuit 1000 is connected to the heat dissipation control circuit 700; the heat dissipation control circuit 700 includes a heat dissipation fan J23, and the heat dissipation control circuit 700 controls the heat dissipation fan J23 to dissipate or stop dissipating heat for the centralized charging device of the drone battery J6;

[0073] The positive output terminal and the negative output terminal of the first power supply circuit 900 cooperate to output the first direct current, the positive output terminal and the negative output terminal of the second power supply circuit 1000 cooperate to output the second direct current, and the negative output terminal of the first power supply circuit 900 and the negative output terminal of the second power supply circuit 1000 are both grounded.

[0074] like Figure 1 and Figure 3 as well as Figure 5As shown, the charging control circuit 200 includes: a first shift register U33 and a second shift register U34, the VCC end of the first shift register U33 and the VCC end of the second shift register U34 are both connected to the positive output end of the first power supply circuit 900, and the GND end of the first shift register U33 and the GND end of the second shift register U34 are both grounded;

[0075] The RCLK, SRCLK and G terminals of the first shift register U33 are connected one-to-one with the RCLK, SRCLK and G terminals of the second shift register U34 in sequence, and then connected one-to-one with the PB11, PB2 and PB15 terminals of the microcontroller U1; the SDI terminal of the first shift register U33 is connected with the PB10 terminal of the microcontroller U1 and the SDO terminal is connected with the SDI terminal of the second shift register U34 to achieve series connection;

[0076] The QA terminal, QB terminal, QC terminal, QD terminal, QE terminal, QF terminal, QG terminal, and QH terminal of the first shift register U33 are connected one-to-one with the control terminal of the first group of sub-charging circuits 100; the QA terminal, QB terminal, QC terminal, QD terminal, QE terminal, QF terminal, QG terminal, and QH terminal of the second shift register U34 are connected one-to-one with the control terminal of the second group of sub-charging circuits 100; two shift registers are used to realize port expansion control of multiple sub-charging circuits 100, which makes up for the insufficient I / O ports of the microcontroller U1 and has low cost.

[0077] like Figure 1 and Figure 4 as well as Figure 5 As shown, the battery communication circuit 300 includes: a first analog multiplexer U30 and a second analog multiplexer U29;

[0078] The SO terminal, S1 terminal, S2 terminal, S3 terminal, and EN terminal of the first analog multiplexer U30 are connected one-to-one with the SO terminal, S1 terminal, S2 terminal, S3 terminal, and EN terminal of the second analog multiplexer U29 in sequence, and then connected one-to-one with the PA4 terminal, PA5 terminal, PA6 terminal, PA7 terminal, and PB0 terminal of the microcontroller U1; the CI / O terminal of the first analog multiplexer U30 is connected with the PA3 terminal of the microcontroller U1, and the CI / O terminal of the second analog multiplexer U29 is connected with the PA2 terminal of the microcontroller U1;

[0079] The I0, I1, I2, I3, I4, I5, I6, I7, I8, I9, I10, and I11 terminals of the first analog multiplexer U30 are connected one-to-one with the 4 pins of the battery J6 of the first group of sub-charging circuits 100 and the 4 pins of the battery J6 of the second group of sub-charging circuits 100; the I0, I1, I2, I3, I4, I5, I6, I7, I8, I9, I10, and I11 terminals of the second analog multiplexer U29 are connected one-to-one with the 5 pins of the battery J6 of the first group of sub-charging circuits 100 and the 4 pins of the battery J6 of the second group of sub-charging circuits 100. Pin 5 of the battery J6 of the circuit 100 is connected one-to-one; wherein, the EN terminals of the first analog multiplexer U30 and the second analog multiplexer U29 are also connected to a seventh resistor, and the other end of the seventh resistor is connected to the positive output terminal of the first power supply circuit 900, for pulling up power to improve the driving capability; the first analog multiplexer U30 and the second analog multiplexer U29 are connected in parallel to realize the communication connection between the microcontroller U1 and the communication port (pin 4 and pin 5) of the battery J6, so as to realize communication with the battery J6 to obtain the status information of the battery J6 and determine whether the battery J6 is in place.

[0080] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A centralized charging device for drone batteries, comprising a plurality of sub-charging circuits; characterized in that: The sub-charging circuit includes a storage battery, and a plurality of the sub-charging circuits are connected to a charging power supply circuit. The sub-charging circuit controls the charging power supply circuit to charge or stop charging the storage battery and is controlled by a charging control circuit; The battery communication circuit is connected to the plurality of batteries respectively, and the battery communication circuit is also connected to the main control circuit. The main control circuit communicates with any one of the batteries through the battery communication circuit to obtain battery status information and determine whether the battery is in place; The battery status information includes: battery voltage and charging current; the main control circuit controls the corresponding sub-charging circuit to charge or stop charging the corresponding battery through the charging control circuit according to the battery voltage or the charging current and whether the battery is in place.

2. The centralized battery charging device for unmanned aerial vehicles according to claim 1, characterized in that: The main control circuit is also connected to a display circuit, and the display circuit displays the battery status information; the main control circuit is a microcontroller; The battery status information also includes: one or more of: SN code, battery capacity, number of cycles, and battery power percentage.

3. The centralized battery charging device for unmanned aerial vehicles according to claim 2, characterized in that: The main control circuit is also connected to a temperature detection circuit and a plurality of heat dissipation control circuits; The temperature detection circuit detects the current temperature of the centralized battery charging device for the unmanned aerial vehicle, and the main control circuit controls one or more heat dissipation control circuits to operate according to the current temperature to dissipate heat or stop dissipating heat for the centralized battery charging device for the unmanned aerial vehicle.

4. The centralized battery charging device for unmanned aerial vehicles according to claim 3, characterized in that: The plurality of sub-charging circuits at least include: a first group of sub-charging circuits and a second group of sub-charging circuits; The charging power supply circuit comprises: a first main charging circuit, a second main charging circuit, a first constant current source and a second constant current source; the first main charging circuit controls the first constant current source to supply power to or stop supplying power to the first group of sub-charging circuits, and the second main charging circuit controls the second constant current source to supply power to or stop supplying power to the second group of sub-charging circuits; The first main charging circuit is connected to the first constant current source and the first group of sub-charging circuits respectively, and the second main charging circuit is connected to the second constant current source and the second group of sub-charging circuits respectively; The main charging circuit includes a switch, and the switch controls the main charging circuit to operate or stop.

5. The centralized battery charging device for unmanned aerial vehicles according to claim 4, characterized in that: The sub-charging circuit includes: a first field effect transistor; The source of the first field effect transistor is the power supply input terminal of the sub-charging circuit, and the drain is respectively connected to pins 10, 11, and 12 of the battery; The source of the first field effect transistor is connected to a first resistor and the gate is connected to a second resistor, the other end of the first resistor is connected to the gate of the first field effect transistor, and the other end of the second resistor is connected to the collector of the transistor; the emitter of the transistor is grounded and the base is connected to a third resistor and a fourth resistor, the other end of the third resistor is the control end of the sub-charging circuit, and the other end of the fourth resistor is grounded.

6. The centralized battery charging device for unmanned aerial vehicles according to claim 5, characterized in that: The main charging circuit also includes: a second field effect transistor and a third field effect transistor; The drain of the second field effect transistor is the negative input terminal of the main charging circuit and the source is connected to the source of the third field effect transistor. The drain of the third field effect transistor is the negative output terminal of the main charging circuit. The gate of the second field effect transistor is connected to the gate of the third field effect transistor and is also connected to the fifth resistor, the sixth resistor and the cathode of the voltage-stabilizing diode. The anode of the voltage-stabilizing diode and the other end of the fifth resistor are both connected to the source of the second field effect transistor. The other end of the sixth resistor is connected to the switch. The other end of the switch is connected to the cathode of the diode. The anode of the diode is the positive input terminal of the main charging circuit.

7. The centralized battery charging device for unmanned aerial vehicles according to claim 6, characterized in that: The positive output end of the first constant current source is respectively connected to the positive input end of the first main charging circuit and the power supply input end of the first group of sub-charging circuits, and the negative output end is connected to the negative output end of the first main charging circuit, and the pin 1 and pin 2 of the battery of the first group of sub-charging circuits are both connected to the negative input end of the first main charging circuit; The positive output end of the second constant current source is respectively connected to the positive input end of the second main charging circuit and the power supply input end of the second group of sub-charging circuits, and the negative output end is connected to the negative output end of the second main charging circuit, and the 1st pin and the 2nd pin of the battery of the second group of sub-charging circuits are both connected to the negative input end of the second main charging circuit.

8. The centralized battery charging device for unmanned aerial vehicles according to claim 7, characterized in that: The charging power supply circuit is also connected to a first power supply circuit and a second power supply circuit; The positive input terminal of the first power supply circuit and the positive input terminal of the second power supply circuit are respectively connected to the cathode of the diode of the first main charging circuit and the cathode of the diode of the second main charging circuit; the negative input terminal of the first power supply circuit and the negative input terminal of the second power supply circuit are respectively connected to the negative input terminal of the first main charging circuit and the negative input terminal of the second main charging circuit; The first power supply circuit steps down and outputs a first direct current to provide power supply for the main control circuit, the display circuit, the temperature detection circuit, the heat dissipation control circuit, the charging control circuit and the battery communication circuit; the first power supply circuit is respectively connected to the main control circuit, the display circuit, the temperature detection circuit, the heat dissipation control circuit, the charging control circuit and the battery communication circuit; The second power supply circuit outputs a second direct current at a reduced voltage to provide power supply for the plurality of heat dissipation control circuits, and the second power supply circuit is connected to the heat dissipation control circuit; the heat dissipation control circuit includes a heat dissipation fan, and the heat dissipation control circuit controls the heat dissipation fan to dissipate heat or stop dissipating heat for the centralized battery charging device for the unmanned aerial vehicle; The positive output terminal and the negative output terminal of the first power supply circuit cooperate to output the first direct current, the positive output terminal and the negative output terminal of the second power supply circuit cooperate to output the second direct current, and the negative output terminal of the first power supply circuit and the negative output terminal of the second power supply circuit are both grounded.

9. The centralized battery charging device for unmanned aerial vehicles according to claim 8, characterized in that: The charging control circuit comprises: a first shift register and a second shift register, wherein the VCC terminal of the first shift register and the VCC terminal of the second shift register are both connected to the positive output terminal of the first power supply circuit, and the GND terminal of the first shift register and the GND terminal of the second shift register are both grounded; The RCLK, SRCLK and G terminals of the first shift register are connected one-to-one with the RCLK, SRCLK and G terminals of the second shift register in sequence, and then connected one-to-one with the PB11, PB2 and PB15 terminals of the microcontroller; the SDI terminal of the first shift register is connected with the PB10 terminal of the microcontroller and the SDO terminal is connected with the SDI terminal of the second shift register; The QA, QB, QC, QD, QE, QF, QG, and QH terminals of the first shift register are connected one-to-one to the control terminals of the first group of sub-charging circuits; the QA, QB, QC, QD, QE, QF, QG, and QH terminals of the second shift register are connected one-to-one to the control terminals of the second group of sub-charging circuits.

10. The centralized battery charging device for unmanned aerial vehicles according to claim 9, characterized in that: The battery communication circuit includes: a first analog multiplexer and a second analog multiplexer; The SO terminal, S1 terminal, S2 terminal, S3 terminal, and EN terminal of the first analog multiplexer are connected one-to-one with the SO terminal, S1 terminal, S2 terminal, S3 terminal, and EN terminal of the second analog multiplexer in sequence, and then connected one-to-one with the PA4 terminal, PA5 terminal, PA6 terminal, PA7 terminal, and PB0 terminal of the microcontroller; the CI / O terminal of the first analog multiplexer is connected to the PA3 terminal of the microcontroller, and the CI / O terminal of the second analog multiplexer is connected to the PA2 terminal of the microcontroller; The I0, I1, I2, I3, I4, I5, I6, I7, I8, I9, I10 and I11 terminals of the first analog multiplexer are connected one-to-one with the 4 pins of the batteries of the first group of sub-charging circuits and the 4 pins of the batteries of the second group of sub-charging circuits; the I0, I1, I2, I3, I4, I5, I6, I7, I8, I9, I10 and I11 terminals of the second analog multiplexer are connected one-to-one with the 5 pins of the batteries of the first group of sub-charging circuits and the 5 pins of the batteries of the second group of sub-charging circuits.

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