Unmanned aerial vehicle storage battery centralized charging circuit capable of dynamically adjusting charging current

Abstract

The utility model relates to an unmanned aerial vehicle storage battery centralized charging circuit capable of dynamically adjusting charging current, which is characterized in that a plurality of charging circuits are connected with a plurality of storage batteries in a one-to-one manner, the plurality of storage batteries are all connected with a battery communication circuit, the battery communication circuit is connected with a main control circuit, and the plurality of charging circuits are also connected with the main control circuit; the main control circuit controls the plurality of charging circuits to adjust the charging current of the plurality of storage batteries, and the main control circuit controls any one or more charging circuits to charge or stop charging the storage batteries through the charging enabling circuit; wherein the main control circuit reads state information of a plurality of storage batteries through the battery communication circuit, and if the main control circuit does not read the state information of the storage batteries, the main control circuit controls the corresponding charging circuit to stop charging the storage batteries through the charging enabling circuit; therefore, whether the storage battery is in place or not is recognized, the state information of the storage battery is obtained, the charging current of the storage battery is dynamically adjusted, the charging efficiency is improved, and the circuit is simple and small in size.

Description

Technical Field

[0001] The utility model relates to the technical field of charging circuits capable of dynamically adjusting charging current, and more particularly to a centralized charging circuit for unmanned aerial vehicle batteries capable of dynamically adjusting charging current. Background Art

[0002] During the charging process, existing chargers generally only perform trickle charging, constant current charging, constant voltage charging, and charge termination on the battery. They do not have the ability to dynamically adjust the charging current during constant current charging to improve charging efficiency, and can no longer meet people's usage needs. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a centralized charging circuit for UAV batteries with a simple circuit, small size, high charging efficiency and the ability to dynamically adjust the charging current, in response to the above-mentioned defects of the prior art.

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

[0005] A centralized charging circuit for drone batteries capable of dynamically adjusting charging current is constructed, comprising multiple charging circuits and a battery communication circuit; wherein the multiple charging circuits are connected one-to-one with the multiple batteries, the multiple batteries are all connected to the battery communication circuit, the battery communication circuit is connected to a main control circuit, and the multiple charging circuits are also connected to the main control circuit;

[0006] The main control circuit controls the plurality of charging circuits to adjust the charging current of the plurality of batteries;

[0007] The main control circuit is further connected to a charging enabling circuit, and the charging enabling circuit is connected to the plurality of charging circuits;

[0008] The main control circuit controls any one or more charging circuits to charge or stop charging the battery through the charging enabling circuit;

[0009] The main control circuit reads the status information of the plurality of batteries through the battery communication circuit. If the main control circuit fails to read the status information of the batteries, the main control circuit controls the corresponding charging circuit through the charging enabling circuit to stop charging the batteries.

[0010] The utility model discloses a centralized charging circuit for drone batteries capable of dynamically adjusting the charging current, wherein the main control circuit is further connected to a drive enhancement circuit, and the drive enhancement circuit is respectively connected to the battery communication circuit and the plurality of charging circuits and the LED array display screen;

[0011] The driving enhancement circuit is used to increase the driving power of the electrical signal.

[0012] The utility model provides a centralized charging circuit for unmanned aerial vehicle batteries capable of dynamically adjusting the charging current, wherein the main control circuit is further connected to a communication interface circuit, and the communication interface circuit includes: a UART communication protocol interface and a USB communication protocol interface.

[0013] The utility model provides a centralized charging circuit for unmanned aerial vehicle batteries capable of dynamically adjusting the charging current, wherein a plurality of the batteries all communicate with the battery communication circuit using an I2C bus.

[0014] The utility model discloses a centralized charging circuit for drone batteries capable of dynamically adjusting the charging current, wherein the plurality of charging circuits are connected to an external charging power source, and the positive output terminal and the negative output terminal of the charging power source cooperate to output a first direct current;

[0015] The charging circuit includes: a power management chip, a first field effect transistor, a second field effect transistor, a third field effect transistor, an inductor, a first resistor, a second resistor, a third resistor, a fourth resistor and a first capacitor;

[0016] The nACDRV terminal of the power management chip is connected to the gate of the first field-effect transistor, the drain of the first field-effect transistor is connected to the positive output terminal of the charging power supply, and the source is connected to the first resistor. The other end of the first resistor is connected to the drain of the second field-effect transistor, the source of the second field-effect transistor is connected to the drain of the third field-effect transistor and is also connected to the inductor and the PH terminal of the power management chip. The source of the third field-effect transistor is grounded, and the GND terminal of the power management chip is also grounded.

[0017] The HIDRV terminal of the power management chip is connected to the gate of the second field-effect transistor, and the LODRV terminal is connected to the gate of the third field-effect transistor. The other end of the inductor is connected to the second resistor. The other end of the second resistor is the positive output terminal of the charging circuit and cooperates with the negative output terminal of the charging power supply to output the second direct current. The negative output terminal of the charging power supply is grounded. The other end of the second resistor is connected to the first capacitor and the third resistor. The other end of the first capacitor is grounded. The other end of the third resistor is respectively connected to the VFB terminal of the power management chip and the fourth resistor. The other end of the fourth resistor is grounded.

[0018] The ISET1 terminal of the power management chip is connected to a fifth resistor, the other end of the fifth resistor is the current regulation terminal of the charging circuit and is connected to the drive enhancement circuit, and the CE terminal of the charging management chip is the enable control terminal of the charging circuit and is connected to the charging enable circuit;

[0019] The positive electrode of the battery is connected to the positive output terminal of the charging circuit and the negative electrode is grounded; the model of the power management chip is BQ24610.

[0020] The utility model discloses a centralized charging circuit for unmanned aerial vehicle batteries capable of dynamically adjusting the charging current, wherein the main control circuit comprises: a single-chip microcomputer; the model of the single-chip microcomputer is GD32F330CBT6.

[0021] The utility model discloses a centralized charging circuit for UAV batteries capable of dynamically adjusting the charging current, wherein the driving enhancement circuit includes: a level converter and a buffer;

[0022] The SCLA terminal and SDAA terminal of the level converter are connected one-to-one with the PF6 terminal and PF7 terminal of the single-chip microcomputer in sequence, the SCLA terminal of the level converter is connected to the sixth resistor and the SDAA terminal is connected to the seventh resistor, the other end of the sixth resistor and the other end of the seventh resistor and the VCCA terminal and VCCB terminal of the level converter are all connected to the positive electrode of the 3.3V power supply; the SDAB terminal of the level converter is connected to the battery communication circuit and the SCLB terminal is connected to the SCL clock line of the I2C bus of the multiple batteries;

[0023] The A2, A4, A5, A6 and A7 terminals of the buffer are connected one-to-one with the PA1, PB5, PA15, PB6 and PB3 terminals of the single-chip microcomputer in this order; the B2 terminal of the buffer is connected to the A terminals of multiple inverters, and the Y terminals of the multiple inverters are connected one-to-one with the current regulating terminals of the multiple charging circuits;

[0024] The B4 end, the B5 end, the B6 end and the B7 end of the buffer are all connected to the LED array display screen.

[0025] The utility model discloses a centralized charging circuit for unmanned aerial vehicle batteries capable of dynamically adjusting the charging current, wherein the battery communication circuit includes: an analog switch;

[0026] The SO terminal, S1 terminal, S2 terminal, S3 terminal, S4 terminal and EN terminal of the analog switch are connected one-to-one with the PA4 terminal, PA5 terminal, PA6 terminal, PA7 terminal and PB0 terminal of the single chip microcomputer;

[0027] The CI / O terminal of the analog switch is connected to the SDAB terminal of the level converter, and the I0 terminal, I1 terminal, I2 terminal, I3 terminal, I4 terminal, I5 terminal, I6 terminal, I7 terminal, I8 terminal, I9 terminal, I10 terminal, I11 terminal, I12 terminal, I13 terminal, I14 terminal and I15 terminal are connected to the SDA data lines of the I2C bus of the plurality of batteries.

[0028] The utility model provides a centralized charging circuit for UAV batteries capable of dynamically adjusting the charging current, wherein the charging enabling circuit comprises: a first shift register, a second shift register and a plurality of enabling driving circuits;

[0029] 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 to the PB10 terminal of the microcontroller, and the SDO terminal is connected to the SDI terminal of the second shift register;

[0030] The QA terminal, QB terminal, QC terminal, QD terminal, QE terminal, QF terminal, QG terminal, and QH terminal of the first shift register and the QA terminal, QB terminal, QC terminal, QD terminal, QE terminal, QF terminal, QG terminal, and QH terminal of the second shift register are connected one-to-one with the driving terminals of the plurality of enable driving circuits;

[0031] The enabling drive circuit includes: a transistor, an eighth resistor, a ninth resistor, and a tenth resistor, wherein the collector of the transistor is the enabling terminal of the enabling drive circuit and is connected to the eighth resistor, the other end of the eighth resistor is grounded, the base of the transistor is connected to the ninth resistor and the tenth resistor, the other end of the ninth resistor is connected to the emitter of the transistor and to the VREF terminal of the charge management chip, and the other end of the tenth resistor is the driving terminal of the enabling drive circuit;

[0032] The enabling terminals of the plurality of enabling driving circuits are connected one-to-one with the enabling control terminals of the plurality of charging circuits.

[0033] The utility model discloses a centralized charging circuit for drone batteries capable of dynamically adjusting the charging current, wherein the main control circuit is also connected to the LED array display screen, and the LED array display screen displays the charging status of multiple batteries, and the charging status includes: fast charging mode, slow charging mode, and stop charging.

[0034] The beneficial effects of the present utility model are as follows: the main control circuit controls multiple charging circuits to adjust the charging current of multiple batteries, and the main control circuit controls any one or more charging circuits to charge or stop charging the batteries through the charging enable circuit; wherein, the main control circuit reads the status information of multiple batteries through the battery communication circuit, and if the main control circuit does not read the status information of the batteries, it controls the corresponding charging circuits to stop charging the batteries through the charging enable circuit; thereby, it is possible to identify whether the batteries are in place and obtain the status information of the batteries, as well as dynamically adjust the charging current of the batteries, thereby improving the charging efficiency, and the circuit is simple and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work:

[0036] Figure 1 This is a circuit schematic diagram of a charging circuit of a centralized charging circuit for UAV batteries capable of dynamically adjusting the charging current according to a preferred embodiment of the present invention;

[0037] Figure 2 This is a circuit schematic diagram of a battery communication circuit of a centralized charging circuit for UAV batteries capable of dynamically adjusting the charging current according to a preferred embodiment of the utility model;

[0038] Figure 3 This is a circuit schematic diagram of the main control circuit of the centralized charging circuit for UAV batteries capable of dynamically adjusting the charging current in a preferred embodiment of the utility model;

[0039] Figure 4 This is a circuit schematic diagram of a charging enabling circuit of a centralized charging circuit for UAV batteries capable of dynamically adjusting the charging current, according to a preferred embodiment of the present invention;

[0040] Figure 5 This is a circuit schematic diagram of a driving enhancement circuit of a centralized charging circuit for UAV batteries capable of dynamically adjusting the charging current according to a preferred embodiment of the utility model;

[0041] Figure 6 This is a circuit schematic diagram of an LED array display screen of a centralized charging circuit for drone batteries capable of dynamically adjusting the charging current, according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The preferred embodiment of the utility model can dynamically adjust the charging current of the drone battery centralized charging circuit as shown in FIG. Figure 1 See also Figures 2 to 6; including multiple charging circuits 100 and battery communication circuits 200; wherein, the multiple charging circuits 100 are connected one-to-one with multiple batteries (not shown in the figure), the multiple batteries are connected to the battery communication circuit 200, the battery communication circuit 200 is connected to the main control circuit 300, and the multiple charging circuits 100 are also connected to the main control circuit 300;

[0044] The main control circuit 300 controls the multiple charging circuits 100 to adjust the charging current of the multiple batteries;

[0045] The main control circuit 300 is further connected to a charging enabling circuit 400 , which is connected to a plurality of charging circuits 100 ;

[0046] The main control circuit 300 controls any one or more charging circuits 100 to charge or stop charging the battery through the charging enabling circuit 400;

[0047] The main control circuit 300 reads the status information of multiple batteries through the battery communication circuit 200. If the main control circuit 300 fails to read the status information of the battery, it controls the corresponding charging circuit 100 through the charging enabling circuit 400 to stop charging the battery.

[0048] The main control circuit 300 controls multiple charging circuits 100 to adjust the charging current of multiple batteries. The main control circuit 300 controls any one or more charging circuits 100 to charge or stop charging the batteries through the charging enable circuit 400. The main control circuit 300 reads the status information of multiple batteries through the battery communication circuit 200. If the main control circuit 300 does not read the status information of the batteries, it controls the corresponding charging circuit 100 to stop charging the batteries through the charging enable circuit 400. This makes it possible to identify whether the batteries are in place and obtain the status information of the batteries, as well as dynamically adjust the charging current of the batteries, thereby improving charging efficiency. The circuit is simple and compact.

[0049] like Figures 1 to 3 as well as Figure 5 As shown, the main control circuit 300 is further connected to a driving enhancement circuit 500, and the driving enhancement circuit 500 is respectively connected to the battery communication circuit 200 and the plurality of charging circuits 100 and the LED array display screen LED1;

[0050] The driving enhancement circuit 500 is used to increase the driving power of the electrical signal to meet the requirements of long-distance communication.

[0051] like Figure 3 and Figure 6 As shown, the main control circuit 300 is also connected to a communication interface circuit, which includes: a UART communication protocol interface and a USB communication protocol interface; to connect external devices to communicate with each other using the UART communication protocol or the USB communication protocol.

[0052] like Figure 2 As shown, multiple batteries all use the I2C bus to communicate with the battery communication circuit 200, and the communication protocol consistency with the batteries is matched and the communication rate is high.

[0053] like Figure 1 and Figure 4 as well as Figure 5 As shown, the multiple charging circuits 100 are all connected to an external charging power supply, and the positive output terminal and the negative output terminal of the charging power supply cooperate to output a first direct current, wherein the voltage of the first direct current can be 24V;

[0054] The charging circuit 100 includes: a power management chip U1, a first field effect transistor Q1, a second field effect transistor Q2, a third field effect transistor Q3, an inductor L1, a first resistor R1, a second resistor R7, a third resistor R11 and a fourth resistor R14, and a capacitor C13;

[0055] The nACDRV terminal of the power management chip U1 is connected to the gate of the first field-effect transistor Q1. The drain of the first field-effect transistor Q1 is connected to the positive output terminal of the charging power supply and the source is connected to the first resistor R1. The other end of the first resistor R1 is connected to the drain of the second field-effect transistor Q2. The source of the second field-effect transistor Q2 is connected to the drain of the third field-effect transistor Q3 and is also connected to the inductor L1 and the PH terminal of the power management chip U1. The source of the third field-effect transistor Q3 is grounded, and the GND terminal of the power management chip U1 is also grounded.

[0056] The H IDRV terminal of the power management chip U1 is connected to the gate of the second field-effect transistor Q2, and the LODRV terminal is connected to the gate of the third field-effect transistor Q3. The other end of the inductor L1 is connected to the second resistor R7. The other end of the second resistor R7 is the positive output terminal of the charging circuit 100 and cooperates with the negative output terminal of the charging power supply to output the second direct current. The negative output terminal of the charging power supply is grounded. The voltage of the second direct current can be 16.8V. The other end of the second resistor R7 is connected to the capacitor C13 and the third resistor R11. The other end of the capacitor C13 is grounded. The other end of the third resistor R11 is respectively connected to the VFB terminal of the power management chip U1 and the fourth resistor R14. The other end of the fourth resistor R14 is grounded. It is used to meet the working requirements of the power management chip U1. The third resistor R11 and the fourth resistor R14 are used for voltage division to provide output voltage feedback for the power management chip U1 to adjust the output voltage (the voltage of the second direct current) of the power management chip U1.

[0057] The ISET1 terminal of the power management chip U1 is connected to a fifth resistor R20. The other end of the fifth resistor R20 is connected to the current regulation terminal of the charging circuit 100 and the drive enhancement circuit 500. The CE terminal of the charging management chip is the enable control terminal of the charging circuit 100 and is connected to the charging enable circuit 400. The fifth resistor R20 is used to limit current and protect the power management chip U1.

[0058] The positive electrode of the battery is connected to the positive output terminal of the charging circuit 100 and the negative electrode is grounded; the power management chip U1 is model BQ24610, which has low cost, small size and low heat generation.

[0059] like Figure 3 As shown, the main control circuit 300 includes: a single-chip microcomputer U3; the model of the single-chip microcomputer U3 is GD32F330CBT6; it has a small size, low cost and high stability.

[0060] like Figures 1 to 3 as well as Figure 5 As shown, the driving enhancement circuit 500 includes: a level converter U9 and a buffer U8;

[0061] The SCLA and SDAA terminals of the level converter U9 are connected one-to-one with the PF6 and PF7 terminals of the single-chip computer U3 in this order. The SCLA terminal of the level converter U9 is connected to the sixth resistor R157, and the SDAA terminal is connected to the seventh resistor R158. The other end of the sixth resistor R157 and the other end of the seventh resistor R158, as well as the VCCA and VCCB terminals of the level converter U9 are all connected to the positive electrode of the 3.3V power supply; the SDAB terminal of the level converter U9 is connected to the battery communication circuit 200, and the SCLB terminal is connected to the SCL clock line of the I2C bus of multiple batteries;

[0062] The A2, A4, A5, A6, and A7 terminals of the buffer U8 are connected one-to-one with the PA1, PB5, PA15, PB6, and PB3 terminals of the microcontroller U3 in that order. The B2 terminal of the buffer U8 is connected to the A terminals of multiple inverters (not shown), and the Y terminals of the multiple inverters are connected one-to-one with the current regulating terminals of the multiple charging circuits 100.

[0063] The B4, B5, B6 and B7 terminals of the buffer U8 are all connected to the LED array display screen LED1; wherein, the level converter U9 and the buffer U8 are both used to improve the driving capability of the electrical signal and extend the communication distance.

[0064] like Figure 2 and Figure 3 As shown, the battery communication circuit 200 includes: an analog switch U7;

[0065] The SO, S1, S2, S3, S4 and EN terminals of the analog switch U7 are connected one-to-one with the PA4, PA5, PA6, PA7 and PB0 terminals of the microcontroller U3;

[0066] The CI / O terminal of the analog switch U7 is connected to the SDAB terminal of the level converter U9, and the I0 terminal, I1 terminal, I2 terminal, I3 terminal, I4 terminal, I5 terminal, I6 terminal, I7 terminal, I8 terminal, I9 terminal, I10 terminal, I11 terminal, I12 terminal, I13 terminal, I14 terminal and I15 terminal are connected to the SDA data lines of the I2C bus of multiple batteries, so as to realize the I / O port expansion of the microcontroller U3.

[0067] like Figure 3 and Figure 4 As shown, the charging enabling circuit 400 includes: a first shift register U12, a second shift register U13 and a plurality of enabling driving circuits 410;

[0068] The RCLK, SRCLK, and G terminals of the first shift register U12 are connected one-to-one with the RCLK, SRCLK, and G terminals of the second shift register U13 in sequence, and then connected one-to-one with the PB11, PB2, and PB15 terminals of the microcontroller U3; the SDI terminal of the first shift register U12 is connected to the PB10 terminal of the microcontroller U3, and the SDO terminal is connected to the SDI terminal of the second shift register U13;

[0069] The QA, QB, QC, QD, QE, QF, QG, and QH terminals of the first shift register U12 and the QA, QB, QC, QD, QE, QF, QG, and QH terminals of the second shift register U13 are connected one-to-one with the driving terminals of the plurality of enable driving circuits 410, so as to achieve I / O port expansion of the single-chip microcomputer U3 and continuous control output to control the enable driving circuits 410;

[0070] The enabling drive circuit 410 includes: a transistor Q4, an eighth resistor R24, a ninth resistor Q12, and a tenth resistor R15. The collector of the transistor Q4 is the enabling terminal of the enabling drive circuit 410 and is connected to the eighth resistor R24. The other end of the eighth resistor R24 ​​is grounded. The base of the transistor Q4 is connected to the ninth resistor Q12 and the tenth resistor R15. The other end of the ninth resistor Q12 is connected to the emitter of the transistor Q4 and to the VREF terminal of the charge management chip. The other end of the tenth resistor R15 is the driving terminal of the enabling drive circuit 410.

[0071] The enable terminals of the multiple enable driving circuits 410 are connected one-to-one with the enable control terminals of the multiple charging circuits 100 ; the circuit is simple and the cost is low.

[0072] like Figure 3 and Figure 6 As shown, the main control circuit 300 is also connected to an LED array display screen LED1, which displays the charging status of multiple batteries. The charging status includes: fast charging mode, slow charging mode, and stop charging; it is easy to check the charging status and has low cost.

[0073] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. A centralized charging circuit for UAV batteries capable of dynamically adjusting charging current, comprising multiple charging circuits and a battery communication circuit; characterized in that: The plurality of charging circuits are connected one-to-one with the plurality of storage batteries, the plurality of storage batteries are all connected with the battery communication circuit, the battery communication circuit is connected with the main control circuit, and the plurality of charging circuits are also connected with the main control circuit; The main control circuit controls the plurality of charging circuits to adjust the charging current of the plurality of batteries; The main control circuit is further connected to a charging enabling circuit, and the charging enabling circuit is connected to the plurality of charging circuits; The main control circuit controls any one or more charging circuits to charge or stop charging the battery through the charging enabling circuit; The main control circuit reads the status information of the plurality of batteries through the battery communication circuit. If the main control circuit fails to read the status information of the batteries, the main control circuit controls the corresponding charging circuit through the charging enabling circuit to stop charging the batteries.

2. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 1 is characterized in that: The main control circuit is further connected to a drive enhancement circuit, which is respectively connected to the battery communication circuit, the plurality of charging circuits and the LED array display screen; The driving enhancement circuit is used to increase the driving power of the electrical signal.

3. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 1 is characterized in that: The main control circuit is also connected to a communication interface circuit, and the communication interface circuit includes: a UART communication protocol interface and a USB communication protocol interface.

4. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 2 is characterized in that: The plurality of storage batteries all communicate with the battery communication circuit using an I 2C bus.

5. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 4 is characterized in that: The plurality of charging circuits are all connected to an external charging power source, and the positive output terminal and the negative output terminal of the charging power source cooperate to output a first direct current; The charging circuit includes: a power management chip, a first field effect transistor, a second field effect transistor, a third field effect transistor, an inductor, a first resistor, a second resistor, a third resistor, a fourth resistor and a first capacitor; The nACDRV terminal of the power management chip is connected to the gate of the first field-effect transistor, the drain of the first field-effect transistor is connected to the positive output terminal of the charging power supply, and the source is connected to the first resistor. The other end of the first resistor is connected to the drain of the second field-effect transistor, the source of the second field-effect transistor is connected to the drain of the third field-effect transistor and is also connected to the inductor and the PH terminal of the power management chip. The source of the third field-effect transistor is grounded, and the GND terminal of the power management chip is also grounded. The H IDRV terminal of the power management chip is connected to the gate of the second field-effect transistor and the LODRV terminal is connected to the gate of the third field-effect transistor. The other end of the inductor is connected to the second resistor. The other end of the second resistor is the positive output terminal of the charging circuit and cooperates with the negative output terminal of the charging power supply to output the second direct current. The negative output terminal of the charging power supply is grounded. The other end of the second resistor is connected to the first capacitor and the third resistor. The other end of the first capacitor is grounded. The other end of the third resistor is respectively connected to the VFB terminal of the power management chip and the fourth resistor. The other end of the fourth resistor is grounded. The ISET1 terminal of the power management chip is connected to a fifth resistor, the other end of the fifth resistor is the current regulation terminal of the charging circuit and is connected to the drive enhancement circuit, and the CE terminal of the power management chip is the enable control terminal of the charging circuit and is connected to the charging enable circuit; The positive electrode of the battery is connected to the positive output terminal of the charging circuit and the negative electrode is grounded; the model of the power management chip is BQ24610.

6. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 5 is characterized in that: The main control circuit includes: a single chip microcomputer; the model of the single chip microcomputer is GD32F330CBT6.

7. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 6, characterized in that: The driving enhancement circuit includes: a level converter and a buffer; The SCLA terminal and SDAA terminal of the level converter are connected one-to-one with the PF6 terminal and PF7 terminal of the single-chip microcomputer in sequence, the SCLA terminal of the level converter is connected to the sixth resistor and the SDAA terminal is connected to the seventh resistor, the other end of the sixth resistor and the other end of the seventh resistor and the VCCA terminal and VCCB terminal of the level converter are all connected to the positive electrode of the 3.3V power supply; the SDAB terminal of the level converter is connected to the battery communication circuit and the SCLB terminal is connected to the SCL clock line of the I2C bus of the multiple batteries; The A2, A4, A5, A6 and A7 terminals of the buffer are connected one-to-one with the PA1, PB5, PA15, PB6 and PB3 terminals of the single-chip microcomputer in this order; the B2 terminal of the buffer is connected to the A terminals of multiple inverters, and the Y terminals of the multiple inverters are connected one-to-one with the current regulating terminals of the multiple charging circuits; The B4 end, the B5 end, the B6 end and the B7 end of the buffer are all connected to the LED array display screen.

8. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 7 is characterized in that: The battery communication circuit includes: an analog switch; The SO terminal, S1 terminal, S2 terminal, S3 terminal, S4 terminal and EN terminal of the analog switch are connected one-to-one with the PA4 terminal, PA5 terminal, PA6 terminal, PA7 terminal and PB0 terminal of the single chip microcomputer; The CI / O terminal of the analog switch is connected to the SDAB terminal of the level converter, and the I0 terminal, I1 terminal, I2 terminal, I3 terminal, I4 terminal, I5 terminal, I6 terminal, I7 terminal, I8 terminal, I9 terminal, I10 terminal, I11 terminal, I12 terminal, I13 terminal, I14 terminal and I15 terminal are connected to the SDA data lines of the I2C bus of the plurality of batteries.

9. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 6, characterized in that: The charging enabling circuit includes: a first shift register, a second shift register and a plurality of enabling driving circuits; 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 single-chip microcomputer; the SDI terminal of the first shift register is connected to the PB10 terminal of the single-chip microcomputer, and the SDO terminal is connected to the SDI terminal of the second shift register; The QA terminal, QB terminal, QC terminal, QD terminal, QE terminal, QF terminal, QG terminal, and QH terminal of the first shift register and the QA terminal, QB terminal, QC terminal, QD terminal, QE terminal, QF terminal, QG terminal, and QH terminal of the second shift register are connected one-to-one with the driving terminals of the plurality of enable driving circuits; The enabling drive circuit includes: a transistor, an eighth resistor, a ninth resistor, and a tenth resistor, wherein the collector of the transistor is the enabling terminal of the enabling drive circuit and is connected to the eighth resistor, the other end of the eighth resistor is grounded, the base of the transistor is connected to the ninth resistor and the tenth resistor, the other end of the ninth resistor is connected to the emitter of the transistor and to the VREF terminal of the power management chip, and the other end of the tenth resistor is the driving terminal of the enabling drive circuit; The enabling terminals of the plurality of enabling driving circuits are connected one-to-one with the enabling control terminals of the plurality of charging circuits.

10. The UAV battery centralized charging circuit capable of dynamically adjusting charging current according to claim 7, characterized in that: The main control circuit is also connected to the LED array display screen, and the LED array display screen displays the charging status of multiple batteries. The charging status includes: fast charging mode, slow charging mode, and stop charging.

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