CN115009101A - A battery control device and an unmanned aerial vehicle with the same - Google Patents

Abstract

The invention discloses a battery control device and an unmanned aerial vehicle with the same, wherein the unmanned aerial vehicle is provided with a battery pack, batteries in the battery pack are arranged in parallel, and each battery is connected with the unmanned aerial vehicle in series through the battery control device so as to carry out battery hot replacement; the battery control device comprises two MOS tube modules which are connected in series. The invention is connected in series between the battery and the unmanned aerial vehicle, and comprises two MOS tube modules which are connected in series, the two MOS tube modules are respectively controlled to realize the hot replacement of each battery, meanwhile, the charging of a low-voltage battery by a high-voltage battery can be effectively avoided, the risks of battery heating, bulging, even burning and the like are avoided, and the technical problems in the prior art are solved.

Description

A battery control device and an unmanned aerial vehicle with the same

technical field

The invention relates to the field of drone power supply battery control, in particular to a drone with multiple batteries connected in parallel, a battery control device for realizing hot battery replacement and avoiding charging of a high-voltage battery to a pressure battery, and a drone with the device.

Background technique

Existing drone batteries have the following shortcomings:

1. Most of the drone batteries are large-capacity batteries. If the remaining power of the battery cannot meet the flight requirements, the power should be turned off first, and then the battery with insufficient power should be replaced with a battery with sufficient power. During the battery replacement process, the UAV will be powered off, causing the UAV to restart, and the equipment restarting takes a long time, reducing the efficiency of flight operations;

2. As shown in Figure 1, when multiple batteries are embedded in the drone and set in parallel, the voltages between the multiple batteries are inconsistent, which will cause the high-voltage battery to charge the low-voltage battery. It is easy to cause the battery to heat up, bulge or even burn due to the excessive charging current.

Therefore, in order to solve the above technical problems, how to design and manufacture a device capable of battery control is one of the technical problems to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

In order to solve the technical problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a battery control device that realizes hot battery replacement and prevents the high-voltage battery from charging the pressure battery.

To achieve the above object, the present invention adopts the following technical solutions:

A battery control device connects a drone and a battery in series, and includes two MOS tube modules connected in series; each of the MOS tube modules is composed of at least one MOS tube.

Further preferably: each of the MOS tube modules is composed of one MOS tube, and the sources of the two MOS tubes are connected in series;

The drain of one MOS transistor is connected in series with the drone, and the drain of the other MOS transistor is connected in series with the battery.

Further preferred: each of the MOS tube modules is composed of two or more MOS tubes, and the two or more MOS tubes are arranged in parallel;

The sources of the two MOS transistor modules are connected in series:

The drain of any MOS tube in one of the MOS tube modules is connected in series with the drone, and the drain of any MOS tube in the other MOS tube module is connected in series with the battery.

Further preferred: the gate of the MOS transistor is the switch control terminal.

Further preferred: the switch control terminal is a switch signal receiving terminal.

Further preferred: both of the two MOS transistor modules are turned off to form an off state.

Further preferred: in the two MOS tube modules, the MOS tubes in the MOS tube module in series with the drone are all turned off, and the MOS tubes in the MOS tube module in series with the battery are all turned on, forming a semi-open state.

Further preferred: the two MOS transistor modules are both turned on to form a fully turned on state.

An unmanned aerial vehicle is equipped with a battery pack, the batteries in the battery pack are arranged in parallel, and each battery is connected in series with the drone through a battery control device to perform hot battery replacement;

The battery control device is the above-mentioned battery control device.

Further preferred: the battery pack includes two batteries, which are arranged in parallel.

After adopting the above-mentioned technical scheme, the present invention has the following advantages compared with the background technology:

The present invention is connected in series between the battery and the drone, and includes two series-connected MOS tube modules. By using the separate control of the two MOS tube modules, the hot replacement of each battery can be realized, and at the same time, the high-voltage battery can be effectively avoided. The charging of the low-voltage battery avoids the risks of battery heating, bulging or even burning, and solves the technical problems existing in the prior art.

Description of drawings

Figure 1 is a schematic diagram of the structure of an existing drone and a battery;

2 is a schematic diagram 1 of the connection structure of the drone, the battery control device and the battery according to the present invention (each MOS tube module is composed of a MOS tube);

FIG. 3 is a schematic diagram 2 of the connection structure of the drone, the battery control device and the battery according to the present invention (each MOS tube module is composed of two or more MOS tubes);

4 is a schematic diagram of the connection structure of each MOS tube and a control circuit in the battery control device of the present invention;

FIG. 5 is a schematic structural diagram of the battery control device corresponding to the battery 1 and the battery 2 in the embodiment of the present invention, both of which are in a closed state;

6 is a schematic structural diagram of the battery control device corresponding to the battery 1 and the battery 2 in the present embodiment of the present invention both in a half-open state;

FIG. 7 is a schematic structural diagram of the battery control device corresponding to the battery 1 and the battery 2 in the present embodiment of the present invention both in a fully open state;

FIG. 8 is a schematic structural diagram of the battery control device corresponding to the battery 1 in the fully open state and the battery control device corresponding to the battery 2 in the half-open state according to the present embodiment of the present invention;

9 is a schematic structural diagram of the battery control device corresponding to the battery 1 in a half-on state and the battery control device corresponding to the battery 2 in a half-on state in the present embodiment of the present invention.

It should be noted that: in FIG. 2 and FIG. 5 to FIG. 9, the mark "control" represents the switch control terminal of the MOS transistor.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

It should be noted in the present invention that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are all based on the orientation or positional relationship shown in the drawings, only It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore should not be construed as a limitation of the present invention.

Example

As shown in Figure 2, an unmanned aerial vehicle has been used in various fields such as high-level operations, photography, exploration, and measurement. In order to ensure the flight time of existing drones, most of them use embedded batteries for real-time power supply. The drone has a built-in battery pack, and the battery pack includes multiple batteries arranged in parallel. It should be noted that the number of batteries is determined according to the flight endurance design of the drone and the power value of a single battery. In general, the number of batteries 2-6 pieces, each of the 2-6 batteries is connected to the drone to supply power to the drone, forming a battery parallel design. The power of each battery is a well-known and conventional parameter in the industry. A battery control device disclosed in the present invention is connected in series between an unmanned aerial vehicle and a battery, so as to realize real-time power supply to the unmanned aerial vehicle, and achieve hot exchange between parallel batteries (the hot exchange is that there is at least one battery for the unmanned aerial vehicle). power supply, so that the drone is turned on to replace the remaining batteries), and the system will not restart during the replacement process; in addition, if the voltages between the batteries are different, there will be no charging between the batteries. And ensure the power supply of the drone.

As shown in FIG. 2 to FIG. 4 , the battery control device is connected in series with a drone and a battery, and includes two MOS transistor modules connected in series; each of the MOS transistor modules is composed of at least one MOS transistor Q. .

As shown in FIG. 2 and FIG. 4 , each of the MOS transistor modules is composed of one MOS transistor Q, and the sources of the two MOS transistors Q are connected in series. Specifically, two MOS transistor modules are connected in series, that is, two MOS transistors Q are connected in series, that is, the sources of the two MOS transistors Q are connected in series, the drain of one MOS transistor Q is connected in series with the drone, and the other A drain of the MOS transistor Q is connected in series with the battery.

As shown in FIG. 3 , each of the MOS transistor modules is composed of two or more MOS transistors, two or more MOS transistors Q are arranged in parallel, and the sources of the two MOS transistor modules are connected in series; Say: two MOS tube modules are connected in series, that is: the sources of the two MOS tube modules are connected in series, the drain of any MOS tube Q in one of the MOS tube modules is connected in series with the drone, and the other MOS tube is connected in series with the drone. The drain of any MOS transistor Q in the module is connected in series with the battery. It should be noted that: when the MOS tube module is composed of two or more MOS tubes, the current load capacity is improved; but in actual use, the number of the MOS tubes Q is set according to the actual current situation. A large number of MOS transistors are arranged in parallel to be able to carry a larger current.

As shown in FIG. 2 to FIG. 4 , the gate of the MOS transistor Q is a switch control terminal, and the gate of the MOS transistor Q is connected to the control chip in the drone to receive a control signal to turn on or off the MOS transistor. ; It should be noted that: as shown in Figure 3, the gate of each MOS transistor Q is the switch control end, the switch control end is the switch signal receiving end, and the switch signal receiving end passes through the control circuit and the control signal transmission interface of the control chip connected to realize switching control of each MOS transistor Q; the specific structure of the control circuit is: the control signal transmission interface CTL of the control chip is connected in series with a first resistor R and a second resistor R, and the first resistor R and the second resistor R are connected in series. The resistors R are arranged in parallel, the first resistor R is grounded, the second resistor R is connected in series with the base of the semiconductor triode, the emitter of the semiconductor triode is grounded, the collector of the semiconductor triode is connected in series with the gate of the MOS transistor Q, and the collector of the semiconductor triode is connected in series with the gate of the MOS transistor Q. The electrodes are also connected in series with a third resistor R, and the third resistor R is connected in series with a voltage of +5V.

As shown in FIG. 2 and FIG. 3 , a parasitic diode is connected in series between the drain and source of each MOS transistor Q to form a unidirectional current supply structure; the parasitic diode in the MOS transistor Q in the two parallel MOS transistor modules The unidirectional current supply direction is opposite.

In the technical solution described below, the battery pack includes two batteries, and the two batteries are arranged in parallel (that is, two batteries are embedded in the drone, each battery is connected in series with the battery control device and the drone, and the two batteries are In addition, the MOS tube module in the battery control device is composed of one MOS tube Q, which will be described as an example.

As shown in Figure 5, the two batteries are battery 1 and battery 2, respectively, battery 1 and battery 2 are connected in parallel with the drone, battery 1 is connected in series with the battery control device and the drone is connected, and battery 2 is connected in series with the battery control device. The drone is connected to realize real-time power supply to the drone.

Specifically, as shown in Figure 5 and Figure 6, the two MOS transistor modules in the battery control device corresponding to battery 1 are MOS transistors Q1 and MOS transistor Q2 respectively, corresponding to the MOS transistors of battery 2. There are two MOS tube modules in the battery control device, and the MOS tubes in the two MOS tube modules are MOS tube Q3 and MOS tube Q4 respectively; the MOS tube Q1 and MOS tube Q3 are arranged close to the drone, and the MOS tube Q2 and the MOS transistor Q4 are disposed close to the battery 1 and the battery 2, respectively.

As shown in Figure 4 and Figure 5, after the control chip in the drone transmits the shutdown signal, the control circuit realizes the shutdown control of the battery control device, so that when the battery control device is in the off state, that is: the MOS tube Q1, the MOS tube Q2, MOS transistor Q3, and MOS transistor Q4 are all off, that is, when both battery 1 and battery 2 are off, battery 1 and battery 2 do not supply power to the drone, and the drone is also off.

4 and 6, when the battery control device is in the half-on state, the control chip in the drone transmits the turn-on signal and the MOS transistor Q in the two MOS transistor modules in the battery control device corresponding to each battery respectively. The signal is turned off, and the control is realized by the control circuit respectively. It should be noted that: the MOS tube module connected in series with the drone among the two MOS tube modules connected in series with the battery is turned off, and the MOS tube connected in series with the battery is turned on, forming a semi-open state; Realize that both battery 1 or battery 2 are in a half-on state, that is, the MOS transistor Q1 and MOS transistor Q3 are in an off state, while the MOS transistor Q2 and MOS transistor Q4 are in an on state; The parasitic diode in the tube Q1 supplies power to the drone, and the battery 2 supplies power to the drone through the turned-on MOS tube Q4 and the parasitic diode in the MOS tube Q3, and at the same time, the batteries 1 and 2 supply power to the drone;

Or, as shown in Figure 4, Figure 7, Figure 8, when the battery control device is in a half-open state, the control chip in the drone sends a shutdown signal to the MOS tube module connected in series with the drone, and the MOS tube module is connected in series with the battery. The turn-on signal is emitted and controlled by the control circuit respectively, so that the battery 1 or the battery 2 is in a half-on state, that is, the MOS transistor Q1 or the MOS transistor Q3 is in an off state, and the MOS transistor Q2 or the MOS transistor Q4 is in an on state; The battery 1 supplies power to the drone through the turned-on MOS tube Q2 and the parasitic diode in the MOS tube Q1, or the battery 2 supplies power to the drone through the turned-on MOS tube Q4 and the parasitic diode in the MOS tube Q3. or 2 by supplying power to the drone.

As shown in Figure 4 and Figure 6, after the control chip in the drone transmits the turn-on signal, the control circuit realizes the turn-on control of the battery control device, so that when the battery control device is in a fully turned-on state, that is: the MOS transistors Q1, MOS The tube Q2, the MOS tube Q3, and the MOS tube Q4 are all turned on, that is, when the battery 1 and the battery 2 are in a fully turned on state, the battery 1 and the battery 2 respectively supply power to the drone.

When the voltages of battery 1 and battery 2 are inconsistent, for example, as shown in Figure 8, the voltage of battery 1 is higher than the voltage of battery 2, and the battery control device corresponding to battery 1 is in a fully-on state, that is, the two MOS transistors Q1 in battery 1 and the MOS transistor Q2 are in the on state, the battery control device corresponding to the battery 2 is in the half-on state, that is, one MOS transistor Q3 in the battery 2 is in the off state, and the other MOS transistor Q4 is in the on state; in this state, the battery The current of 1 is cut off at the parasitic diode in the MOS transistor Q3, thereby effectively avoiding the charging of the high-voltage battery to the low-voltage battery, and ensuring the power supply of the battery 1 and battery 2 to the drone; of course, as shown in Figure 7, if the battery 2 The voltage of the battery 1 is higher than the voltage of the battery 1, the same as above, that is, the current of the battery 2 is cut off at the parasitic diode in the MOS transistor Q1.

As shown in Figures 5 to 9, when the battery control devices corresponding to battery 1 or/and battery 2 are in the off state, the battery can be disassembled and replaced or hot-swapped; the battery control devices corresponding to battery 1 and battery 2 are both in the closed state. In the fully open state, due to the parallel arrangement of battery 1 and battery 2, of course, the purpose of hot battery replacement can be achieved when the drone is not powered off; it should be noted that: as shown in Figure 5, Figure 7 and Figure 8, The battery control device corresponding to battery 1 or/and battery 2 is in the half-open state, and hot replacement of the battery can also be realized. The specific operations are as follows:

Case 1, as shown in Figure 8 and Figure 9, due to insufficient power of battery 1 or battery 2, the corresponding battery control device is in a half-on state. At this time, battery 2 or battery 1 is fully charged, and the corresponding battery control device is fully turned on. state;

First, adjust the battery control device of battery 2 or battery 1 in the fully-on state to the half-on state, that is, adjust the MOS transistor Q3 or the MOS transistor Q1 to the off state, at this time, the battery corresponding to the two batteries is reached. The battery control device is in the half-on state; secondly, the battery control device of the battery 1 or battery 2 originally in the half-on state is adjusted to the off state, so as to disassemble the corresponding battery and replace the battery (the replaced battery is in a fully charged state. or full power state), adjust the battery control device corresponding to the new battery after the replacement to the half-on state; finally, adjust the two battery control devices in the half-on state to the fully-on state to supply power to the drone.

Case 2, as shown in Figure 6, due to insufficient power of battery 1 and battery 2, both battery control devices are in a half-on state;

First, turn off the battery control device of battery 1 or battery 2 to disassemble the corresponding battery of the closed battery control device and replace it with a fully charged battery, and adjust the battery control device corresponding to the new battery after the replacement to a half-on state; secondly, Repeat the above steps for battery 2 or battery 1, continue to replace the battery (the replaced battery is full or full), and adjust the battery control device corresponding to the new battery after the replacement to the half-on state; The battery control device in the half-open state is adjusted to the fully-open state to supply power to the drone.

In summary, this solution can achieve the purpose of hot swapping the drone battery without shutting down the drone, that is, without restarting the drone. At least one battery powers the drone, and the drone is turned on, while the remaining batteries can be removed, replaced, and installed.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. A battery control apparatus characterized in that: the unmanned aerial vehicle and the battery are connected in series, and the unmanned aerial vehicle and the battery comprise two MOS (metal oxide semiconductor) tube modules which are connected in series; each MOS tube module is composed of at least one MOS tube.

2. A battery control apparatus according to claim 1, wherein: each MOS tube module is composed of one MOS tube, and the two MOS tube modules are connected in series, namely the source electrodes of the two MOS tubes are connected in series;

and the drain electrode of one MOS tube is connected with the unmanned aerial vehicle in series, and the drain electrode of the other MOS tube is connected with the battery in series.

3. A battery control apparatus according to claim 1, wherein: each MOS tube module consists of two or more MOS tubes, and the two or more MOS tubes are arranged in parallel;

the source electrodes of the two MOS tube modules are connected in series:

one the drain electrode of any MOS pipe in the MOS pipe module is connected with the unmanned aerial vehicle in series, and the drain electrode of any MOS pipe in the MOS pipe module is connected with the battery in series.

4. A battery control apparatus according to claim 1, wherein: and the grid electrode of the MOS tube is a switch control end.

5. The battery control apparatus according to claim 4, wherein: the switch control end is a switch signal receiving end.

6. A battery control apparatus according to any one of claims 1-5, wherein: and the two MOS tube modules are closed to form a closed state.

7. A battery control apparatus according to any one of claims 1-5, wherein: MOS pipe all closes in two MOS pipe modules with unmanned aerial vehicle series connection MOS pipe module, all opens with MOS pipe in the battery series connection MOS pipe module, forms half-open state.

8. A battery control apparatus according to any one of claims 1-5, wherein: and the two MOS tube modules are opened to form a full-open state.

9. An unmanned aerial vehicle, its characterized in that: the battery pack is provided with batteries, the batteries in the battery pack are arranged in parallel, and each battery is connected with the unmanned aerial vehicle in series through a battery control device so as to carry out battery hot replacement;

the battery control device is a battery control device according to any one of claims 1 to 4.

10. A drone according to claim 9, characterised in that: the battery pack comprises two batteries which are arranged in parallel.

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