A battery pack packaging case

Abstract

The utility model belongs to unmanned aerial vehicle battery field discloses a battery package packaging shell, including the shell, the shell is the square tube of upper and lower opening, has the square groove on the shell outer wall, the square groove penetrates the inner wall of shell, the shell lateral wall of square groove outside is fixed with the wind baffle, the wind baffle upper end is fixed with the shell outer wall, and the gap is left between the wind baffle lower end and the shell outer wall, the shell below is fixed with the spoiler, and the through slot is opened to the spoiler, and the through slot penetrates the upper and lower end surface of spoiler;The rubber block is fixed on the spoiler top surface in the shell, and the gauze board is fixed in the shell inner chamber above the spoiler, and the pressing strip is fixed on the shell inner wall above the gauze board;The utility model solves the problem that the unmanned aerial vehicle battery package is poor in heat dissipation condition.

Description

Technical Field

[0001] This utility model belongs to the field of drone batteries, and in particular relates to a battery pack packaging shell. Background Technology

[0002] Drones are increasingly used not only in everyday photography but also in numerous fields such as emergency rescue, facility inspection, and public safety. Therefore, the safety standards for drone flight should be continuously improved to reduce the frequency of accidents. Battery safety is a crucial part of drone safety testing. However, most existing battery packs are simply multiple cells glued to the casing with structural adhesive during encapsulation. Each pair of adjacent cells is directly bonded together, resulting in poor heat dissipation. They can only rely on the casing for external heat dissipation. Therefore, whenever the battery pack discharges at high power, it may be forced to reduce its output power due to excessive temperature, or even directly cause the battery pack to catch fire. Thus, the battery pack encapsulation conditions not only affect the drone's flight performance but are also closely related to its flight safety. Summary of the Invention

[0003] The purpose of this utility model is to provide a battery pack enclosure to solve the problem of poor heat dissipation in drone battery packs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A battery pack enclosure includes a housing, which is a square tube with openings at the top and bottom. A square groove is formed on the outer wall of the housing, penetrating the inner wall of the housing. A wind deflector is fixed on the side wall of the housing outside the square groove. The upper end of the wind deflector is fixed to the outer wall of the housing, and a gap is left between the lower end of the wind deflector and the outer wall of the housing. A spoiler is fixed below the housing, and a through groove is formed on the spoiler, penetrating the upper and lower end faces of the spoiler. Multiple rubber blocks are fixed on the top surface of the spoiler inside the housing. A grid plate is fixed in the inner cavity of the housing above the spoiler, and a pressure strip is fixed on the inner wall of the housing above the grid plate.

[0006] As a further description of the above technical solution:

[0007] The spoiler has an airfoil-shaped cross-section. The length of the through slot is parallel to the straight line where the rear edge of the spoiler is located, and the length of the square slot is perpendicular to the straight line where the rear edge of the spoiler is located. This allows the spoiler to allow airflow to enter from the square slot and exit from the through slot when the UAV is flying forward, and the wind deflector to allow airflow to enter from the through slot and exit from the square slot when the UAV is flying upward.

[0008] As a further description of the above technical solution:

[0009] Each of the rubber blocks is located at both ends of the through groove. The width of the rubber block is greater than the width of the through groove. When the battery cell is inserted into the housing, the rubber blocks and the battery cell are arranged at intervals so that two adjacent battery cells are separated by the rubber blocks. Since the width of the rubber block is greater than the width of the through groove, the battery cell is not exposed at the opening of the through groove.

[0010] As a further description of the above technical solution:

[0011] The length direction of the grid on the grid plate is the same as the length direction of the through slot. Therefore, after the battery cell is inserted into the grid, the gap between every two adjacent battery cells is connected to the square slot. Rubber pads are pasted on the inner side of the grid on the grid plate. When the battery cell is inserted into the grid, the rubber pads can prevent the outer casing of the battery cell from being damaged. At the same time, the rubber pads can also seal the battery cell above the grid plate, preventing the airflow with water mist in rainy weather from contacting the terminal at the top of the battery cell.

[0012] As a further description of the above technical solution:

[0013] The pressure bar is fixed to the inner wall of the housing by bolts, which facilitates the upper and lower limit of the cells in the grid. A cover plate is fixed above the pressure bar by bolts. The cover plate has through holes. The power bus of multiple cells is connected and extends out of the housing from the through holes.

[0014] As a further description of the above technical solution:

[0015] The lower end of the shell is fixed with a protective plate, which is a U-shaped bent plate. Both ends of the protective plate are fixed to the bottom of the shell. The spoiler is located between the shell and the protective plate. When the UAV flies forward, the airflow flows from between the protective plate and the spoiler to the rear.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] (1) By setting square grooves and wind deflectors on both sides of the shell and setting through grooves on the spoiler at the lower end of the shell, the present invention enables airflow to flow between the cells when the UAV is flying forward or taking off upward, thereby achieving a cooling effect and preventing the battery from malfunctioning due to overheating.

[0018] (2) The bottom of this utility model is equipped with a protective plate, which can not only constrain the airflow under the spoiler, further increase the airflow speed under the spoiler, and enhance the airflow speed inside the shell when flying forward; it can also separate the spoiler from the ground during charging, maintain the gas flow at the through slot, so the heat generated by the battery cell during charging will drive the airflow inside the shell to flow upward and flow out from the square slot, thus achieving temperature control during charging.

[0019] (3) In the existing battery pack, the cells are mostly fixed by bonding multiple cells together. Once a collision occurs, the cell closest to the collision end will be squeezed by the other cells, which can easily lead to diaphragm damage, short circuit and fire. In contrast, the multiple cells of this utility model are fixed at intervals. Even if a collision occurs, each cell has independent support, which eliminates the situation of excessive force on a single cell and makes it safer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the use of this utility model;

[0021] Figure 2 This is a perspective view of the present utility model;

[0022] Figure 3 This is a diagram of the internal structure of the present invention after removing the cover plate 10;

[0023] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is a schematic diagram showing the positions of the through groove 5 and the square groove 2 of this utility model;

[0025] Figure 6 This is a bottom structural diagram of the present invention after the protective plate 12 has been removed.

[0026] Legend: 1. Shell; 2. Square groove; 3. Wind baffle; 4. Spoiler; 5. Through groove; 6. Rubber block; 7. Grid plate; 8. Pressure strip; 9. Rubber pad; 10. Cover plate; 11. Through hole; 12. Protective plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-5 This utility model provides a technical solution for a battery pack packaging shell:

[0029] A battery pack enclosure includes a housing 1, which is a square tube with openings at the top and bottom. A square groove 2 is formed on the outer wall of the housing 1, and the square groove 2 penetrates the inner wall of the housing 1. A wind deflector 3 is fixed on the side wall of the housing 1 outside the square groove 2. The upper end of the wind deflector 3 is fixed to the outer wall of the housing 1, and a gap is left between the lower end of the wind deflector 3 and the outer wall of the housing 1. A spoiler 4 is fixed below the housing 1. The spoiler 4 has an airfoil-shaped cross-section and a through groove 5 that penetrates the upper and lower end faces of the spoiler 4. The length direction of the through groove 5 is parallel to the straight line where the rear edge of the spoiler 4 is located, and the length direction of the square groove 2 is perpendicular to the straight line where the rear edge of the spoiler 4 is located. This allows the spoiler 4 to allow airflow to enter from the square groove 2 and exit from the through groove 5 when the UAV is flying forward, and the wind deflector 3 to allow airflow to enter from the through groove 5 and exit from the square groove 2 when the UAV is flying upward.

[0030] Multiple rubber blocks 6 are fixed on the top surface of the baffle 4 inside the housing 1. Each rubber block 6 is located at both ends of the through groove 5. The width of the rubber block 6 is greater than the width of the through groove 5. When the battery cell is inserted into the housing 1, the rubber blocks 6 and the battery cell are arranged at intervals so that two adjacent battery cells are separated by the rubber blocks 6. Since the width of the rubber block 6 is greater than the width of the through groove 5, the battery cell is not exposed at the opening of the through groove 5.

[0031] A grid plate 7 is fixed inside the housing 1 above the spoiler 4. The length direction of the grid on the grid plate 7 is the same as the length direction of the through slot 5. Thus, after the battery cell is inserted into the grid, the gap between every two adjacent battery cells is connected to the square slot 2. Furthermore, a rubber pad 9 is pasted on the inner side of the grid on the grid plate 7. When the battery cell is inserted into the grid, the rubber pad 9 can prevent the outer casing of the battery cell from being damaged. At the same time, the rubber pad 9 can also seal the battery cell above the grid plate 7, preventing the airflow with water mist in rainy weather from contacting the terminal at the top of the battery cell.

[0032] A pressure strip 8 is fixed on the inner wall of the housing 1 above the grid plate 7. The pressure strip 8 is fixed to the inner wall of the housing 1 by bolts, which facilitates the upper and lower limit of the cells in the grid. A cover plate 10 is fixed above the pressure strip 8 by bolts. A through hole 11 is opened on the cover plate 10. The power bus after multiple cells are connected extends out of the housing 1 from the through hole 11.

[0033] A protective plate 12 is fixed to the lower end of the shell 1. The protective plate 12 is a U-shaped bent plate. Both ends of the protective plate 12 are fixed to the bottom of the shell 1. The spoiler 4 is located between the shell 1 and the protective plate 12. When the UAV flies forward, the airflow flows from between the protective plate 12 and the spoiler 4 to the rear.

[0034] Working principle:

[0035] In use, the pressure strip 8 is first removed from the housing 1. Then, multiple battery cells are inserted one by one into each grid on the grid plate 7, with the lower end of each battery cell positioned between two adjacent rubber blocks 6. After insertion, the lower end of each battery cell is pressed and fixed by the rubber blocks 6, and the upper end of the battery cell is pressed and fixed by the rubber strips in the grid. The rubber strips can seal the upper end of each battery cell within the housing 1 above the grid plate 7, thus placing the terminal block at the upper end of the battery cell in a closed cavity to isolate it from external water vapor. Subsequently, the pressure strip 8 is fixed above the battery cell in a close fit. Finally, the terminal blocks between the battery cells are connected, and the power bus passes through the through hole 11 on the cover plate 10 and exits the housing 1. The cover plate 10 is then fixed with bolts, and the battery pack is encapsulated.

[0036] When using the battery pack, such as Figure 1 As shown, the housing 1 is fixed to the bottom of the drone, and the power bus is connected to the drone's power cable. At this time, the wind deflector 3 and the spoiler 4 are exposed below the drone. When the drone takes off, the airflow flows from top to bottom. Since there is a gap between the lower end of the wind deflector 3 and the outer wall of the housing 1, that is, the wind deflector 3 extends outward, the airflow velocity at the lower end of the wind deflector 3 is greater than the airflow velocity at the connection between the housing 1 and the protective plate 12. According to Bernoulli's principle, the air pressure at the lower end of the wind deflector 3 is less than the air pressure inside the housing 1. Therefore, the air between the cells flows from the square groove 2 to the outside of the housing 1. At the same time, the external airflow continuously flows into the housing 1 from the through groove 5, thereby causing the external airflow to continuously flow between the cells, achieving a cooling effect and preventing the drone from malfunctioning due to excessive battery output power during the takeoff phase.

[0037] When the drone flies forward, the airflow flows from front to back. The front end of the spoiler 4 is on the windward side. The airfoil arc surface at the lower end of the spoiler 4 makes the airflow velocity between the guard plate 12 and the spoiler 4 greater than the airflow velocity near the side wall of the shell 1. Therefore, according to Bernoulli's principle, the airflow flows into the shell 1 from the square groove 2 and flows out of the shell 1 from the through groove 5, realizing gas circulation between the cells, achieving a cooling effect, and preventing the battery from malfunctioning due to heat accumulation during long-term drone flight.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present utility model within the scope of the technology disclosed in the present utility model, and all such substitutions or changes should be included within the protection scope of the present utility model.

Claims

1. A battery pack packaging housing, characterized in that... Includes a shell (1), which is a square tube with openings at the top and bottom. A square groove (2) is opened on the outer wall of the shell (1), and the square groove (2) penetrates the inner wall of the shell (1). A wind deflector (3) is fixed on the side wall of the shell (1) outside the square groove (2). The upper end of the wind deflector (3) is fixed to the outer wall of the shell (1), and a gap is left between the lower end of the wind deflector (3) and the outer wall of the shell (1). A spoiler (4) is fixed below the shell (1), and a through groove (5) is opened on the spoiler (4). The through groove (5) penetrates the upper and lower end faces of the spoiler (4). Multiple rubber blocks (6) are fixed on the top surface of the spoiler (4) inside the shell (1). A grid plate (7) is fixed in the inner cavity of the shell (1) above the spoiler (4), and a pressure strip (8) is fixed on the inner wall of the shell (1) above the grid plate (7).

2. The housing according to claim 1, characterized in that, The spoiler (4) has an airfoil-shaped cross-section. The length direction of the through groove (5) is parallel to the straight line where the rear edge of the spoiler (4) is located, and the length direction of the square groove (2) is perpendicular to the straight line where the rear edge of the spoiler (4) is located.

3. The housing according to claim 1, characterized in that, Each of the rubber blocks (6) is located at both ends of the through groove (5), and the width of the rubber block (6) is greater than the width of the through groove (5).

4. The housing according to claim 1, characterized in that, The length direction of the grid on the grid plate (7) is the same as the length direction of the through groove (5), and a rubber pad (9) is pasted on the inner side of the grid on the grid plate (7).

5. The housing according to claim 1, characterized in that, The pressure strip (8) is fixed to the inner wall of the housing (1) by bolts. A cover plate (10) is fixed above the pressure strip (8) by bolts. A through hole (11) is opened on the cover plate (10). The power bus after multiple battery cells are connected extends out of the housing (1) from the through hole (11).

6. The housing according to claim 1, characterized in that, The lower end of the housing (1) is fixed with a protective plate (12), which is a U-shaped bent plate. Both ends of the protective plate (12) are fixed to the bottom of the housing (1). The spoiler (4) is located between the housing (1) and the protective plate (12).

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