Semi-solid-state battery pack for low-altitude unmanned aerial vehicle

Abstract

The invention relates to the technical field of battery packs, in particular to a semi-solid-state battery pack for a low-altitude unmanned aerial vehicle, which comprises a track shell, a semi-solid-state battery cell group movably arranged in the track shell, and a compressed gas cylinder fixed with the track shell, a front-end main spring is arranged on one side of the semi-solid-state battery cell group, and a rear-end main spring is arranged on the other side of the semi-solid-state battery cell group. A control cylinder is arranged on the other side of the semi-solid battery cell group; when the low-altitude unmanned aerial vehicle flies linearly and rapidly, the gravity center of the unmanned aerial vehicle is changed by adjusting the position of the semi-solid-state battery cell set, so that the gravity center of the unmanned aerial vehicle moves forwards, and after the gravity center of the unmanned aerial vehicle moves forwards, due to the fact that the inertia of the head is increased, the unmanned aerial vehicle is not prone to being interfered by airflow, and the stability of rapid linear flight is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to a semi-solid battery pack for low-altitude unmanned aerial vehicles. Background Art

[0002] During the flight process, unmanned aerial vehicles spend a lot of time flying in a straight line to quickly reach the target location. Since low-altitude unmanned aerial vehicles usually do not fly at a high altitude, when they encounter airflow reflected from vertical buildings during straight and fast flight, the vertical updraft will cause the unmanned aerial vehicle to instantly gain additional upward lift, causing the nose to lift upward and change the pitch attitude, which has a great impact on the stability of the aircraft. In addition, due to the development of battery technology, semi-solid battery packs with higher energy density have also begun to be used in unmanned aerial vehicles. When unmanned aerial vehicles fly in a straight line, they are often at the fastest speed. Once a collision occurs, the impact force can easily break the solid electrolyte in the semi-solid battery pack, increasing the risk of thermal runaway of the battery, posing a major safety hazard. Summary of the invention

[0003] The purpose of the present invention is to provide a semi-solid battery pack for low-altitude unmanned aerial vehicles to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a semi-solid battery pack for low-altitude unmanned aerial vehicles, comprising a track shell, a semi-solid battery cell group movably arranged inside the track shell, and a compressed gas cylinder fixed to the track shell, one side of the semi-solid battery cell group is provided with a front main spring, the other side of the semi-solid battery cell group is provided with a control cylinder, the compressed gas cylinder is filled with compressed gas, the compressed gas cylinder is used to drive the control cylinder, so that the control cylinder pushes the semi-solid battery cell group to move linearly, and the front main spring is used to push the semi-solid battery cell group to reset; When the control cylinder pushes the semi-solid battery cell group to move linearly, the center of gravity of the unmanned aerial vehicle moves forward in the direction of linear flight.

[0005] The control cylinder is fixedly installed with the track shell, and a right-angle support plate is fixedly provided at the end of the control cylinder. An internal air passage is opened in the right-angle support plate, and the internal air passage is connected with the inner cavity of the control cylinder. A main air pipe is provided between the internal air passage and the compressed gas cylinder.

[0006] The main air pipe is provided with a pressure regulating valve, and the main air pipe is connected with a branch air pipe, the branch air pipe is located on the side of the pressure regulating valve away from the compressed gas cylinder, and the branch air pipe is connected with a deflation solenoid valve.

[0007] A piston body is provided inside the control cylinder, and the piston body is in airtight contact with the control cylinder. A driving top shaft is fixedly provided on the piston body, and an end push plate is fixedly provided on the driving top shaft. The driving top shaft contacts the semi-solid battery cell group through the end push plate to push the semi-solid battery cell group to move. A limiting protrusion is fixedly provided on the inner wall surface of the control cylinder, and the limiting protrusion is used to limit the piston body.

[0008] The inner wall surface of the track shell is provided with a convex cover bin, which is located on the side of the semi-solid battery cell group away from the control cylinder. The semi-solid battery cell group is in airtight contact with the inner wall surface of the track shell. The inner wall surface of the convex cover bin is provided with an air window, and the convex cover bin is connected to the outside atmosphere through the air window.

[0009] A short detection tube is fixedly arranged on the inner wall surface of the convex cover bin, both ends of the short detection tube are open, and one end of the short detection tube is connected to the inner cavity of the track shell, a closed ring eaves is fixedly arranged in the short detection tube, a status detection disk is arranged on the side of the closed ring eaves away from the semi-solid battery cell group, the status detection disk is in airtight contact with the inner wall surface of the short detection tube, and a disk side compression spring is arranged on the side of the status detection disk away from the closed ring eaves.

[0010] The state detection disk is penetrated with a beam exhaust hole, the detection short tube is penetrated with a quick exhaust groove, the state detection disk is fixedly provided with an active lock buckle, and the detection short tube is fixedly provided with a matching lock buckle. When the state detection disk moves axially through the position of the quick exhaust groove, the active lock buckle will contact and engage with the matching lock buckle, thereby limiting the state detection disk.

[0011] An air control boss is fixedly provided on the inner wall surface of the convex cover bin, and a gas flow channel is opened in the air control boss and the side wall of the track shell, one end of the gas flow channel is connected to the compressed gas cylinder, and a cross-sectional cylindrical cavity is opened inside the air control boss, and the cross-sectional cylindrical cavity cross-sections the gas flow channel.

[0012] An air-sealed moving shaft is arranged in the cross-sectional cylindrical cavity, and the air-sealed moving shaft is in air-tight contact with the inner wall surface of the cross-sectional cylindrical cavity. The gas flow path is blocked by the air-sealed moving shaft. An axis end groove is opened in the air control boss, and a spring pressure plate is arranged in the axis end groove. The spring pressure plate is fixedly installed with the air-sealed moving shaft.

[0013] A threaded plug is spirally installed in the shaft end groove, a dynamic shaft spring is arranged between the threaded plug and the spring pressure plate, and an annular air groove is opened on the air seal dynamic shaft.

[0014] An air whistle is embedded in the air control boss, and the air whistle is connected to the gas flow channel; When the status detection disk moves axially and passes the position of the quick exhaust groove, the status detection disk will be squeezed and contacted with the end of the gas seal dynamic shaft, pushing the gas seal dynamic shaft to move axially, so that the annular gas groove moves into the gas flow channel. At this time, the compressed gas cylinder is connected to the air whistle through the gas flow channel.

[0015] The semi-solid battery cell group is provided with a battery plug, the track shell is provided with a plug movable window, the battery plug corresponds to the position of the plug movable window, and the semi-solid battery cell group is connected to the unmanned aerial vehicle for power supply through the battery plug; The compressed gas cylinder is provided with a pressure filling nozzle, through which compressed gas can be added to the compressed gas cylinder.

[0016] A foam pad is arranged in the track shell, a main spring positioning hole and a chamber groove are opened on the foam pad, the front end main spring limiter is arranged in the main spring positioning hole, and the convex cover chamber is in the chamber groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The semi-solid battery pack for low-altitude unmanned aerial vehicles of the present invention can change the center of gravity of the unmanned aerial vehicle by adjusting the position of the semi-solid battery cell group when the low-altitude unmanned aerial vehicle is flying in a straight and fast manner, so that the center of gravity of the unmanned aerial vehicle moves forward. When the center of gravity of the unmanned aerial vehicle moves forward, the inertia of the nose increases and it is not easily disturbed by airflow, thereby improving the stability during fast straight flight; and during non-fast straight flight, the center of gravity can be controlled to reset and return to the initial state, thereby ensuring the dynamic controllability of the unmanned aerial vehicle.

[0018] At the same time, through the arrangement of the above-mentioned structure, when the unmanned aerial vehicle collides during its straight and rapid flight, the semi-solid battery cell group can be further moved forward relative to the track shell for buffering through the front main spring. At this time, part of the kinetic energy of the semi-solid battery cell group is converted into the elastic potential energy of the front main spring, which can reduce the peak impact force of the collision during the straight and rapid flight of the unmanned aerial vehicle, thereby reducing the degree of damage, protecting the semi-solid battery cell group to a greater extent, and reducing the probability of solid electrolyte breakage in the semi-solid battery cell group.

[0019] The present invention can automatically distinguish between the slow adjustment movement and the collision impact movement of the semi-solid battery cell group by cooperating with the detection short tube, the status detection disk, the air seal dynamic shaft and other structures. When the semi-solid battery cell group moves under the impact of a collision, the above structure can automatically connect the compressed gas cylinder with the air whistle, so that the unmanned aerial vehicle emits a continuous whistle sound, so that in the event of a power outage caused by a collision, the unmanned aerial vehicle can be located and found by the whistle sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2It is a schematic diagram of the overall structure of the present invention from another angle.

[0022] Figure 3 It is the front view of the overall structure of the present invention.

[0023] Figure 4 It is a three-dimensional half-section schematic diagram of the overall structure of the present invention.

[0024] Figure 5 for Figure 4 A magnified schematic diagram of area A in the middle.

[0025] Figure 6 for Figure 4 Enlarged schematic diagram of area B in the middle.

[0026] Figure 7 for Figure 6 Enlarged schematic diagram of area C in the middle.

[0027] Figure 8 It is a three-dimensional half-section schematic diagram of the present invention at a horizontal angle.

[0028] In the figure: 1. track shell; 2. semi-solid battery cell group; 3. front main spring; 4. compressed gas cylinder; 5. control cylinder; 501. right angle support plate; 502. internal air passage; 503. main air pipe; 504. pressure regulating valve; 505. branch air pipe; 506. deflation solenoid valve; 507. piston body; 508. driving top shaft; 509. end push plate; 510. limit convex part; 101. convex cover bin; 102. air window; 103. detection short tube; 104. closed ring eaves; 105. status detection disk; 106. disk side compression spring; 107. Beam exhaust hole; 108. Quick exhaust groove; 109. Active lock; 110. Matching lock; 111. Air control boss; 112. Gas flow channel; 113. Cross-section cylindrical cavity; 114. Air seal moving shaft; 115. Shaft end groove; 116. Spring pressure plate; 117. Threaded plug; 118. Moving shaft spring; 119. Annular air groove; 120. Air whistle; 201. Battery plug; 202. Plug movable window; 401. Pressurized air nozzle; 301. Foam pad; 302. Main spring positioning hole; 303. Chamber groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 8The present invention provides a technical solution: a semi-solid battery pack for a low-altitude unmanned aerial vehicle, such as Figure 8 As shown in the figure, it includes a track shell 1, a semi-solid battery cell group 2 movably arranged inside the track shell 1, and a compressed gas cylinder 4 fixed to the track shell 1. The track shell 1 is made of aluminum to improve the lightweight of the semi-solid battery pack. The semi-solid battery cell group 2 is composed of a plurality of semi-solid batteries connected in series and parallel. A front end main spring 3 is arranged on one side of the semi-solid battery cell group 2, and a control cylinder 5 is arranged on the other side of the semi-solid battery cell group 2. The compressed gas cylinder 4 is filled with compressed gas. The compressed gas cylinder 4 is used to drive the control cylinder 5 so that the control cylinder 5 pushes the semi-solid battery cell group 2 to move in a straight line. The front end main spring 3 is used to push the semi-solid battery cell group 2 to reset; when the control cylinder 5 pushes the semi-solid battery cell group 2 to move in a straight line, the center of gravity of the unmanned aerial vehicle moves forward in the direction of straight-line flight.

[0031] The control cylinder 5 is fixedly installed with the track shell 1, and a right-angle support plate 501 is fixedly arranged at the end of the control cylinder 5. The right-angle support plate 501 can stably support the tail end of the control cylinder 5 while playing the role of gas communication. An inner air passage 502 is opened in the right-angle support plate 501, and the inner air passage 502 is connected with the inner cavity of the control cylinder 5. A main air pipe 503 is arranged between the inner air passage 502 and the compressed gas cylinder 4. A pressure regulating valve 504 is arranged on the main air pipe 503. The pressure regulating valve 504 is a pressure regulating valve in the prior art, which is used to control the output air pressure of the compressed gas cylinder 4.

[0032] The main air pipe 503 is connected with a branch air pipe 505, which is located on the side of the pressure regulating valve 504 away from the compressed gas cylinder 4. The branch air pipe 505 is connected with a deflation solenoid valve 506. A piston body 507 is arranged inside the control cylinder 5, and the piston body 507 is in airtight contact with the control cylinder 5. A driving top shaft 508 is fixedly arranged on the piston body 507, and an end push plate 509 is fixedly arranged on the driving top shaft 508. The driving top shaft 508 contacts the semi-solid battery cell group 2 through the end push plate 509 to push the semi-solid battery cell group 2 to move. A limiting convex portion 510 is fixedly arranged on the inner wall surface of the control cylinder 5, and the limiting convex portion 510 is used to limit the piston body 507. The air pressure acting on the surface of the piston body 507 is changed by the pressure regulating valve 504, so that the piston body 507 generates thrusts of different sizes, which are balanced with the elastic force of the front main spring 3 at different positions, thereby realizing the adjustment of the driving position of the semi-solid battery cell group 2. A position sensor may be disposed inside the track shell 1 to provide closed-loop feedback on the position of the semi-solid battery cell group 2 in the track shell 1 .

[0033] The inner wall surface of the track shell 1 is provided with a convex cover bin 101, which is located on the side of the semi-solid battery group 2 away from the position of the control cylinder 5. The semi-solid battery group 2 is in airtight contact with the inner wall surface of the track shell 1. The inner wall surface of the convex cover bin 101 is provided with an air window 102, and the convex cover bin 101 is connected to the outside atmosphere through the air window 102. A detection short tube 103 is fixedly provided on the inner wall surface of the convex cover bin 101, and both ends of the detection short tube 103 are open, and one end of the detection short tube 103 is connected to the inner cavity of the track shell 1. A closed ring eaves 104 is fixedly provided in the detection short tube 103. A state detection disk 105 is provided on the side of the closed ring eaves 104 away from the semi-solid battery group 2. The state detection disk 105 is in airtight contact with the inner wall surface of the detection short tube 103, and a disk side compression spring 106 is provided on the side of the state detection disk 105 away from the closed ring eaves 104.

[0034] A beam exhaust hole 107 is opened through the status detection disk 105, a quick exhaust groove 108 is opened through the detection short tube 103, an active lock 109 is fixedly provided on the status detection disk 105, and a matching lock 110 is fixedly provided on the detection short tube 103. When the status detection disk 105 moves axially through the position of the quick exhaust groove 108, the active lock 109 will contact and engage with the matching lock 110, thereby limiting the status detection disk 105.

[0035] The inner wall surface of the convex cover bin 101 is fixedly provided with a gas control convex seat 111, and a gas flow channel 112 is opened in the gas control convex seat 111 and the side wall of the track shell 1, and one end of the gas flow channel 112 is connected to the compressed gas cylinder 4. Figure 3 and Figure 6 As shown in FIG. 1 , the gas flow channel 112 is opened in the gas control boss 111 and the side wall of the track housing 1. Figure 3 As shown in FIG, a pipeline is provided at the bottom of the compressed gas cylinder 4, which is connected to the gas flow channel 112 in the side wall of the track shell 1 through the pipeline.

[0036] A cross-section cylindrical cavity 113 is provided inside the air control boss 111, and the cross-section cylindrical cavity 113 cross-sections and divides the gas flow channel 112. An air-sealing movable shaft 114 is provided in the cross-section cylindrical cavity 113, and the air-sealing movable shaft 114 is in airtight contact with the inner wall surface of the cross-section cylindrical cavity 113, and the gas flow channel 112 is blocked by the air-sealing movable shaft 114. An axis end groove 115 is provided in the air control boss 111, and a spring pressure plate 116 is provided in the axis end groove 115, and the spring pressure plate 116 is fixedly installed with the air-sealing movable shaft 114. A threaded plug 117 is spirally installed in the axis end groove 115, and a movable shaft spring 118 is provided between the threaded plug 117 and the spring pressure plate 116, and an annular air groove 119 is provided on the air-sealing movable shaft 114.

[0037] An air whistle 120 is embedded on the air control boss 111, and the air whistle 120 is connected to the gas flow channel 112. When the status detection disk 105 moves axially and passes the position of the quick exhaust groove 108, the status detection disk 105 will be squeezed and contacted with the end of the air seal dynamic shaft 114, pushing the air seal dynamic shaft 114 to move axially, so that the annular air groove 119 moves into the gas flow channel 112. At this time, the compressed gas cylinder 4 is connected to the air whistle 120 through the gas flow channel 112.

[0038] A battery plug 201 is provided on the semi-solid battery cell group 2, and a plug movable window 202 is provided on the track shell 1. The battery plug 201 corresponds to the position of the plug movable window 202. The semi-solid battery cell group 2 is connected to the power supply of the unmanned aerial vehicle through the battery plug 201. The unmanned aerial vehicle is provided with a plug that can be matched with the male and female plugs of the battery plug 201, and is connected through a wire row, which does not affect the activity of the semi-solid battery cell group 2; a charging nozzle 401 is provided on the compressed gas cylinder 4, and compressed gas can be added to the compressed gas cylinder 4 through the charging nozzle 401. A pressure sensor can be provided in the compressed gas cylinder 4 to remind when the air pressure in the compressed gas cylinder 4 is insufficient.

[0039] A foam pad 301 is arranged in the track shell 1. The foam pad 301 is made of fireproof material and is safer. A main spring positioning hole 302 and a chamber groove 303 are opened on the foam pad 301. The front main spring 3 is limited in the main spring positioning hole 302, and the convex cover chamber 101 is in the chamber groove 303.

[0040] When installing the semi-solid battery pack for low-altitude unmanned aerial vehicles of the present invention, it is necessary to make the adjustment movement direction of the semi-solid battery cell group 2 parallel to the straight flight direction of the unmanned aerial vehicle; if the battery pack is used in an unmanned aerial vehicle that can fly straight in multiple directions, a rotary servo can be set outside the track shell 1. The rotary servo is a device that can be driven by rotation and has a self-locking structure in the prior art. It will not be repeated in this application. By controlling the rotation of the track shell 1, the adjustment movement direction of the semi-solid battery cell group 2 is always parallel to the straight flight direction of the unmanned aerial vehicle. And the front main spring 3 is placed in the front of the flight direction. When a collision occurs during the straight flight, the front main spring 3 can elastically support and buffer the semi-solid battery cell group 2.

[0041] The initial state is Figure 4 As shown in , at this time, under the elastic thrust of the front main spring 3, the semi-solid battery pack 2 is squeezed to the far right; in this initial state, the counterweight of the unmanned aerial vehicle is adjusted so that the center of gravity of the unmanned aerial vehicle is centered. When the center of gravity is centered, the unmanned aerial vehicle usually has higher maneuverability. It can also be specially adjusted according to special needs.

[0042] When the unmanned aerial vehicle is flying at high speed in a straight line, the pressure regulating valve 504 is controlled to open, and the compressed gas in the compressed gas cylinder 4 is released through the pressure regulating valve 504. The compressed gas enters the control cylinder 5 through the main air pipe 503 and the internal air passage 502, pushing the piston body 507 and the driving top shaft 508 to move, so that the end push plate 509 pushes the semi-solid battery group 2 to adjust and move, and compresses the front main spring 3. When the semi-solid battery group 2 moves toward the front main spring 3, since the front main spring 3 is at the front end of the flight direction, the center of gravity of the unmanned aerial vehicle will move forward along the flight direction. The forward center of gravity will make the inertia of the head of the unmanned aerial vehicle larger, and it is less likely to change its posture due to airflow interference, thereby enhancing the pitch stability. When the posture of the unmanned aerial vehicle changes due to vertical interference airflow, the forward center of gravity will produce a more effective restoring torque. For example, when the airflow lifts the nose of the UAV upward, the forward center of gravity will form a large downward gravity component, and the torque generated by this gravity component relative to the center of gravity can cause the nose to return to its initial horizontal posture. Just like a pendulum, the center of gravity in the forward direction is similar to the center of gravity of a pendulum being closer to the swing axis, and it is easier to return to the initial position after being deviated from the equilibrium position by external forces.

[0043] The pressure regulating valve 504 has a pressure regulating function and can control the output gas pressure of the compressed gas cylinder 4. By controlling the gas pressure, the equilibrium position of the semi-solid battery group 2 is controlled to adjust the position of the semi-solid battery group 2. It is worth noting that when adjusting the moving position of the semi-solid battery group 2, the semi-solid battery group 2 is moved to the direction of the foam pad 301 to the maximum extent, and a certain buffer gap must be ensured between the semi-solid battery group 2 and the foam pad 301. When the unmanned aerial vehicle flies in a straight line, it often has the fastest speed. When the unmanned aerial vehicle collides during the straight-line flight, the collision impact is often parallel to the adjustment movement direction of the semi-solid battery group 2. At this time, the semi-solid battery group 2 will move forward relative to the track shell 1 for buffering, converting part of the kinetic energy into the elastic potential energy of the front main spring 3, reducing the peak value of the collision impact force during the unmanned aerial vehicle's straight-line rapid flight.

[0044] When the UAV is not flying in a straight line, the pressure regulating valve 504 is controlled to be closed and the air release solenoid valve 506 is controlled to be opened. At this time, the compressed gas in the control cylinder 5 is discharged through the air release solenoid valve 506. Under the elastic force of the front main spring 3, the semi-solid battery cell group 2 is reset to the initial state, thereby improving the controllability of the UAV.

[0045] In the above process, if Figure 7As shown in , the state detection disk 105 can detect the moving state of the semi-solid battery cell group 2. When the semi-solid battery cell group 2 is pushed by the control cylinder 5 to move at a low speed, the semi-solid battery cell group 2 is equivalent to a piston inside the track shell 1, pushing the gas in the track shell 1 to be discharged to the outside through the beam exhaust hole 107. Since the moving speed of the semi-solid battery cell group 2 is relatively low, the gas in the track shell 1 has sufficient time to pass through the beam exhaust hole 107, and the state detection disk 105 will not move. When a collision occurs during the straight flight process, the semi-solid battery cell group 2 moves rapidly toward the front main spring 3, so that the gas does not have time to be discharged through the beam exhaust hole 107. The air pressure will push the state detection disk 105 to move backward, so that the state detection disk 105 passes through the quick exhaust slot 108 and exhausts to the outside through the quick exhaust slot 108.

[0046] When the status detection disk 105 passes the position of the quick exhaust groove 108, the active lock buckle 109 will contact and lock with the matching lock buckle 110. At this time, the air seal dynamic shaft 114 is squeezed and moved by the status detection disk 105 and maintained, so that the annular gas groove 119 is in the gas flow channel 112. Since the gas flow channel 112 is connected to the compressed gas cylinder 4, the compressed gas in the compressed gas cylinder 4 enters the air whistle 120 through the gas flow channel 112 and the annular gas groove 119, so that the air whistle 120 emits a flute sound. If the circuit of the unmanned aerial vehicle is damaged during a collision and loses its positioning and power supply, the above-mentioned physical flute sound can make it more convenient to find the unmanned aerial vehicle, and by controlling the diameter of the gas flow channel 112, the release flow rate of the compressed gas in the compressed gas cylinder 4 is small enough to ensure sufficient release time.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A semi-solid battery pack for a low-altitude unmanned aerial vehicle, comprising a track shell (1), a semi-solid battery cell group (2) movably arranged inside the track shell (1), and a compressed gas cylinder (4) fixed to the track shell (1), characterized in that: A front main spring (3) is arranged on one side of the semi-solid battery cell group (2), and a control cylinder (5) is arranged on the other side of the semi-solid battery cell group (2). The compressed gas cylinder (4) is filled with compressed gas. The compressed gas cylinder (4) is used to drive the control cylinder (5), so that the control cylinder (5) pushes the semi-solid battery cell group (2) to move linearly. The front main spring (3) is used to push the semi-solid battery cell group (2) to reset. When the control cylinder (5) pushes the semi-solid battery cell group (2) to move linearly, the center of gravity of the unmanned aerial vehicle moves forward in the direction of linear flight.

2. A semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 1, characterized in that: The control cylinder (5) is fixedly mounted on the track housing (1); a right-angle support plate (501) is fixedly arranged at the end of the control cylinder (5); an inner air passage (502) is provided in the right-angle support plate (501); the inner air passage (502) is communicated with the inner cavity of the control cylinder (5); and a main air pipe (503) is provided between the inner air passage (502) and the compressed gas cylinder (4).

3. A semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 2, characterized in that: The main air pipe (503) is provided with a pressure regulating valve (504), and the main air pipe (503) is connected to a branch air pipe (505), the branch air pipe (505) is located on a side of the pressure regulating valve (504) away from the location of the compressed gas cylinder (4), and the branch air pipe (505) is connected to a deflation solenoid valve (506).

4. The semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 3, characterized in that: A piston body (507) is arranged inside the control cylinder (5), the piston body (507) and the control cylinder (5) are in airtight contact, a driving top shaft (508) is fixedly arranged on the piston body (507), an end push plate (509) is fixedly arranged on the driving top shaft (508), the driving top shaft (508) contacts the semi-solid battery cell group (2) through the end push plate (509), and pushes the semi-solid battery cell group (2) to move, and a limiting convex portion (510) is fixedly arranged on the inner wall surface of the control cylinder (5), and the limiting convex portion (510) is used to limit the piston body (507).

5. The semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 1, characterized in that: The inner wall surface of the track shell (1) is provided with a convex cover bin (101), the convex cover bin (101) is located on a side of the semi-solid battery cell group (2) away from the location of the control cylinder (5), the semi-solid battery cell group (2) is in airtight contact with the inner wall surface of the track shell (1), the inner wall surface of the convex cover bin (101) is provided with an air window (102), and the convex cover bin (101) is connected to the outside atmosphere through the air window (102).

6. A semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 5, characterized in that: A short detection tube (103) is fixedly arranged on the inner wall surface of the convex cover bin (101); both ends of the short detection tube (103) are open, and one end of the short detection tube (103) is in communication with the inner cavity of the track shell (1); a closed ring eave (104) is fixedly arranged in the short detection tube (103); a state detection disk (105) is arranged on a side of the closed ring eave (104) away from the semi-solid battery cell group (2); the state detection disk (105) is in airtight contact with the inner wall surface of the short detection tube (103); and a disk side compression spring (106) is arranged on a side of the state detection disk (105) away from the closed ring eave (104).

7. A semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 6, characterized in that: The state detection disk (105) is provided with a beam exhaust hole (107), the detection short tube (103) is provided with a quick exhaust groove (108), the state detection disk (105) is fixedly provided with an active lock buckle (109), and the detection short tube (103) is fixedly provided with a matching lock buckle (110); when the state detection disk (105) moves axially through the position of the quick exhaust groove (108), the active lock buckle (109) will contact and engage with the matching lock buckle (110), thereby limiting the state detection disk (105).

8. The semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 7, characterized in that: An air control convex seat (111) is fixedly provided on the inner wall surface of the convex cover bin (101), a gas flow channel (112) is provided in the air control convex seat (111) and the side wall of the track housing (1), one end of the gas flow channel (112) is connected to the compressed gas cylinder (4), and a cross-section cylindrical cavity (113) is provided inside the air control convex seat (111), and the cross-section cylindrical cavity (113) cross-sections the gas flow channel (112).

9. A semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 8, characterized in that: An air-sealed movable shaft (114) is arranged in the cross-sectional cylindrical cavity (113), and the air-sealed movable shaft (114) is in air-tight contact with the inner wall surface of the cross-sectional cylindrical cavity (113). The gas flow channel (112) is blocked by the air-sealed movable shaft (114). An axis end groove (115) is provided in the air control boss (111), and a spring pressure plate (116) is arranged in the axis end groove (115). The spring pressure plate (116) is fixedly mounted on the air-sealed movable shaft (114).

10. A semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 9, characterized in that: A threaded plug (117) is spirally installed in the shaft end groove (115), a dynamic shaft spring (118) is arranged between the threaded plug (117) and the spring pressure plate (116), and an annular air groove (119) is provided on the air-sealed dynamic shaft (114).

11. A semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 10, characterized in that: An air whistle (120) is embedded in the air control boss (111), and the air whistle (120) is in communication with the air flow channel (112); When the status detection disk (105) moves axially past the position of the quick exhaust groove (108), the status detection disk (105) will come into contact with the end of the gas seal movable shaft (114) by compression, pushing the gas seal movable shaft (114) to move axially, causing the annular gas groove (119) to move into the gas flow channel (112), at which time the compressed gas cylinder (4) is connected to the gas whistle (120) via the gas flow channel (112).

12. The semi-solid battery pack for low-altitude unmanned aerial vehicles according to claim 1, characterized in that: The semi-solid battery cell group (2) is provided with a battery plug (201), the track shell (1) is provided with a plug movable window (202), the battery plug (201) and the plug movable window (202) are located correspondingly, and the semi-solid battery cell group (2) is connected to the unmanned aerial vehicle for power supply via the battery plug (201); The compressed gas cylinder (4) is provided with a pressure-charging nozzle (401), and compressed gas can be added to the compressed gas cylinder (4) through the pressure-charging nozzle (401).

13. The semi-solid battery pack for low-altitude unmanned aerial vehicle according to claim 5, characterized in that: A foam pad (301) is arranged in the track shell (1), a main spring positioning hole (302) and a chamber groove (303) are provided on the foam pad (301), the front main spring (3) is limitedly arranged in the main spring positioning hole (302), and the convex cover chamber (101) is located in the chamber groove (303).

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