Lithium battery pack heat dissipation device for telemetering unmanned aerial vehicle

Abstract

The utility model discloses a lithium battery pack heat dissipation device for a telemetering unmanned aerial vehicle. The lithium battery pack heat dissipation device comprises a solid-liquid phase change material, a waveform aluminum plate, raindrop type turbulent flow micro-bulges, a unit lithium battery pack shell, an L-shaped heat conduction aluminum sheet, a thermal interface material, a battery pack shell, a heat dissipation fan and a lithium battery, the corrugated aluminum plates are arranged on the upper surfaces and the lower surfaces of the lithium batteries, the solid-liquid phase change materials are arranged in gaps between the lithium batteries and the corrugated aluminum plates, the raindrop type turbulent flow micro-bulges are arranged on the surfaces of the corrugated aluminum plates, and the three lithium batteries are connected in parallel to form a unit lithium battery pack; unit lithium battery pack shells are arranged on the peripheries of the unit lithium battery packs, L-shaped heat conduction aluminum sheets are arranged on the unit lithium battery pack shells, the three unit lithium battery packs form a lithium battery pack, battery pack shells are arranged on the periphery of the lithium battery pack, and cooling fans are evenly arranged on the air inlet sides of the battery pack shells. According to the utility model, sudden temperature rise and non-uniformity caused by heat generated by high heat flow when the lithium battery of the telemetering unmanned aerial vehicle works at a high load can be effectively relieved, the heat dissipation efficiency is high, and the heat stability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, and in particular to a lithium battery pack heat dissipation device for a remote sensing unmanned aerial vehicle. Background Art

[0002] In recent years, drones, as a flight platform based on autonomous flight control technology, have been favored and widely used in various industries for their unique advantages of low cost, intelligence, lightness and flexibility. Among them, telemetry drones can carry various types of remote sensing monitoring instruments on demand, can fly and take pictures autonomously according to the predetermined route, and provide remote sensing monitoring data and low-altitude video surveillance in real time, which has important application value in environmental monitoring, geological exploration, agricultural and forestry planning and other fields.

[0003] At present, lithium batteries are the main power supply unit for telemetry UAVs, providing the required power for the operation of airborne remote sensing monitoring instruments and equipment. It is worth noting that lithium batteries will generate a lot of heat when running. If they are not released in time, it will seriously threaten the safe and efficient operation of lithium batteries and telemetry UAVs. In particular, as the tasks of telemetry UAVs become increasingly diverse, the power consumption load of their airborne remote sensing monitoring instruments and equipment continues to increase, and the requirements for flight radius and hovering time are also getting higher and higher. This further increases the single-machine power and energy density of the lithium battery pack of the telemetry UAV, bringing greater challenges to the cooling and heat dissipation of the lithium battery pack for UAVs. Traditional pure air cooling and heat dissipation technology has gradually become incapable of meeting the requirements. On the other hand, the limited onboard space and load of the UAV also place stringent requirements on the integration, compactness and deadweight of the lithium battery cooling and heat dissipation system.

[0004] To this end, the Chinese utility model patent with application number 202220207964.3 discloses a heat dissipation device for a lithium battery of a drone, which realizes heat dissipation and cooling by taking away the heat generated by the battery in the form of forced convection through the cooling medium in the interval channel adjacent to the lithium battery. However, the cooling and heat dissipation system involved in the patent needs to bring its own cooling medium, resulting in a reduction in the payload capacity of the drone and a weakened flexibility. Furthermore, since an additional pump device needs to be installed to drive the cooling medium to work, the system structure is complex, occupies a large internal space, and consumes additional power, affecting the reliability and working time of the drone. In addition, the Chinese utility model application with application number 201820973918.8 discloses a heat dissipation device for a drone, a heat dissipation chassis is installed at the bottom of the drone body, an annular groove is arranged in the middle of the surface of the heat dissipation chassis, an air outlet is arranged on the surface of the annular groove, and an exhaust port is arranged in the center, and the heat source of the lithium battery inside the drone is cooled by air through the cooling fans at the four corners inside the drone body. Although the annular air outlet in the application can evenly discharge the air volume in an annular shape, it also reduces the disturbance of air flow, resulting in low efficiency of air convection heat exchange and poor heat dissipation. Furthermore, since the fan and air outlet are arranged at the same time on the heat dissipation chassis, internal heat accumulation is likely to occur during the heat dissipation process, causing local temperature rise and affecting the normal operation of the drone. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a lithium battery pack heat dissipation device for a telemetry drone. In order to solve the above technical problem, the utility model adopts the following technical solutions:

[0006] A lithium battery pack heat dissipation device for a telemetry drone, comprising:

[0007] Solid-liquid phase change material, corrugated aluminum plate, raindrop-shaped spoiler micro-convexity, unit lithium battery pack shell, L-shaped thermal conductive aluminum sheet, thermal interface material, battery pack shell, cooling fan and lithium battery.

[0008] The corrugated aluminum plate is arranged on the two outer surfaces with the largest surface areas of the lithium battery, the solid-liquid phase change material is arranged in the interval space between the lithium battery and the corrugated aluminum plate, and the raindrop-shaped spoiler micro-convex is arranged on the surface of the corrugated aluminum plate; three lithium batteries provided with solid-liquid phase change material, corrugated aluminum plate and raindrop-shaped spoiler micro-convex are arranged in parallel to form a unit lithium battery group, and a unit lithium battery group shell is arranged around the unit lithium battery group, and two L-shaped heat-conducting aluminum sheets are arranged on the unit lithium battery group shell; three groups of unit lithium battery groups provided with unit lithium battery group shells and L-shaped heat-conducting aluminum sheets constitute a lithium battery pack, and a battery pack shell is arranged around the lithium battery pack, and three cooling fans are evenly arranged on the air inlet side of the battery pack shell.

[0009] Furthermore, four raindrop-shaped spoiler micro-protrusions are evenly arranged on the surface of the corrugated aluminum plate, and the raindrop-shaped spoiler micro-protrusions are staggered on adjacent corrugated aluminum plates.

[0010] Furthermore, the vertical portion of the L-shaped thermally conductive aluminum sheet is coupled to the right surface of the unit lithium battery pack shell through the thermal interface material, and the horizontal portion of the L-shaped thermally conductive aluminum sheet protrudes from the upper surface of the battery pack shell and is coupled to the upper fuselage of the drone, which can dissipate the heat inside the lithium battery pack that is difficult to discharge.

[0011] Furthermore, the material of the corrugated aluminum plate is metal aluminum, with a thickness of 0.5 mm, a plate length of 60 mm, a width of 40 mm, and a wave height of 2 mm.

[0012] Furthermore, the material of the raindrop-shaped spoiler micro-convexity is metal aluminum, and the length is 3.4 mm.

[0013] Furthermore, the material of the unit lithium battery pack shell is metal aluminum, with a thickness of 0.5 mm, a length of 60 mm, a width of 40 mm, and a height of 36 mm.

[0014] Furthermore, the L-shaped heat-conducting aluminum sheet has a thickness of 0.5 mm, a width of 2 mm, a height of the vertical portion of 58 mm, and a length of the horizontal portion of 50 mm.

[0015] Furthermore, the material of the battery pack shell is metal aluminum, with a thickness of 0.5 mm, a length of 182 mm, a width of 40 mm, and a height of 37 mm.

[0016] Furthermore, the outer diameter of the cooling fan is 35 mm and the length of the blade is 28 mm.

[0017] Furthermore, the lithium battery has a length of 60 mm, a width of 40 mm, and a height of 8 mm.

[0018] Furthermore, a cooling fan is used for forced convection. After the air exchanges heat with the surface of the corrugated aluminum plate, it reaches the tail of the drone from the air outlet side of the battery pack shell and is directly discharged into the air.

[0019] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0020] 1. The utility model can make full use of the advantages of large latent heat absorption and small temperature change in the solid-liquid phase change process. The solid-liquid phase change material arranged in the interval space of the corrugated aluminum plate between the lithium batteries absorbs part of the heat generated by the lithium battery, effectively alleviating the temperature surge and unevenness caused by high heat flow when the lithium battery is working at high load.

[0021] 2. The utility model can enhance the air turbulence effect by setting the raindrop-shaped turbulence micro-convexities on the surface of the corrugated aluminum plate, increase the heat exchange specific surface area, and improve the forced convection cooling effect of the surface. In addition, the raindrop-shaped micro-convexities involved in the utility model can enhance the convection cooling effect while minimizing the air flow resistance.

[0022] 3. The utility model efficiently conducts the heat that is difficult to discharge from the lithium battery pack to the upper fuselage of the drone for timely dissipation through the L-shaped heat-conducting aluminum sheet coupled to the outer shell of the unit lithium battery pack, which can effectively avoid local overheating caused by heat accumulation inside the battery pack and further improve the overall heat dissipation and cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a partial exploded view of the UAV in the embodiment of the utility model.

[0024] Figure 2 This is a lithium battery pack-UAV fuselage coupling diagram of the utility model.

[0025] Figure 3 This is a lithium battery pack diagram of the present utility model.

[0026] Figure 4 It is a half-section view of the lithium battery pack of the present utility model.

[0027] Figure 5 This is a structural diagram of a unit lithium battery pack shell of the utility model.

[0028] Figure 6 This is a diagram of a unit lithium battery pack of the present utility model.

[0029] Figure 7 It is a top view of a unit lithium battery pack of the present utility model.

[0030] Figure 8 It is a partial enlarged view of the unit lithium battery pack of the utility model.

[0031] The accompanying drawings are marked as follows: 1-UAV upper fuselage; 2-solid-liquid phase change material; 3-corrugated aluminum plate; 4-raindrop-shaped spoiler micro-convex; 5-unit lithium battery pack housing; 6-L-shaped thermal conductive aluminum sheet; 7-thermal interface material; 8-battery pack housing; 9-cooling fan; 10-lithium battery. DETAILED DESCRIPTION

[0032] In order to enable technicians to better understand the method of the utility model, the technical solution in the embodiment of the utility model will be described in detail below in conjunction with the drawings in the example of the utility model.

[0033] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] To achieve the above purpose, the utility model proposes a lithium battery pack heat dissipation device for a telemetry drone, such as Figure 1 As shown, the device is mainly used for remote sensing UAVs. The lithium battery pack is set behind the UAV cavity and includes:

[0038] Solid-liquid phase change material 2, corrugated aluminum plate 3, raindrop-shaped spoiler micro-convexity 4, unit lithium battery pack housing 5, L-shaped thermal conductive aluminum sheet 6, thermal interface material 7, battery pack housing 8, cooling fan 9 and lithium battery 10.

[0039] like Figure 2 , 3 As shown in Figure 4, the corrugated aluminum plate 3 is arranged on the two outer surfaces of the lithium battery 10 with the largest surface area, the solid-liquid phase change material 2 is arranged in the interval space between the lithium battery 10 and the corrugated aluminum plate 3, and the raindrop-shaped spoiler micro-convexity 4 is arranged on the surface of the corrugated aluminum plate 3; three lithium batteries 10 provided with solid-liquid phase change material 2, corrugated aluminum plate 3 and raindrop-shaped spoiler micro-convexity 4 are arranged in parallel to form a unit lithium battery group, and a unit lithium battery group shell 5 is arranged around the unit lithium battery group, and two L-shaped heat-conducting aluminum sheets 6 are arranged on the unit lithium battery group shell 5; three groups of unit lithium battery groups provided with unit lithium battery group shells 5 and L-shaped heat-conducting aluminum sheets 6 constitute a lithium battery pack, and a battery pack shell 8 is arranged around the lithium battery pack, and three cooling fans 9 are evenly arranged on the air inlet side of the battery pack shell 8.

[0040] The three cooling fans 9 correspond to the three groups of unit lithium battery packs respectively. Air enters from the front air inlet side of the battery pack through the cooling fans 9 and is discharged from the rear air outlet side.

[0041] like Figure 5 As shown, the vertical portion of the L-shaped heat-conducting aluminum sheet 6 is coupled to the right surface ① of the unit lithium battery pack housing 5 through the thermal interface material 7, and the horizontal portion of the L-shaped heat-conducting aluminum sheet 6 protrudes from the upper surface of the battery pack housing 8 and is coupled to the upper fuselage 1 of the drone, which can dissipate the heat inside the lithium battery pack that is difficult to discharge.

[0042] like Figure 6 , 7 As shown in FIG8 , four raindrop-shaped spoiler micro-convexities 4 are evenly arranged on the surface of the corrugated aluminum plate 3, and the raindrop-shaped spoiler micro-convexities 4 are staggered on adjacent corrugated aluminum plates 3. Air enters from the front air inlet side, exchanges heat with the corrugated aluminum plate 3, and then flows along the Figure 6 The air flows along the route shown in the figure and is discharged from the air outlet side.

[0043] The material of the corrugated aluminum plate 3 is metal aluminum, with a thickness of 0.5 mm, a plate length of 60 mm, a width of 40 mm, and a wave height of 2 mm.

[0044] The raindrop-shaped spoiler micro-protrusion 4 is made of metal aluminum and has a length of 3.4 mm.

[0045] The material of the unit lithium battery pack housing 5 is metal aluminum, with a thickness of 0.5 mm, a length of 60 mm, a width of 40 mm, and a height of 36 mm.

[0046] The L-shaped heat-conducting aluminum sheet 6 has a thickness of 0.5 mm, a width of 2 mm, a height of the vertical portion of 58 mm, and a length of the horizontal portion of 50 mm.

[0047] The battery pack shell 8 is made of metal aluminum, with a thickness of 0.5 mm, a length of 182 mm, a width of 40 mm, and a height of 37 mm.

[0048] The outer diameter of the heat dissipation fan 9 is 35 mm, and the length of the blade is 28 mm.

[0049] The lithium battery 10 has a length of 60 mm, a width of 40 mm, and a height of 8 mm.

[0050] In this embodiment, the remote sensing drone generates a lot of heat due to long-term continuous flight. The internal temperature of the battery is high. At this time, the lithium battery pack heat dissipation device proposed in the utility model starts to work. The specific contents are as follows:

[0051] S1. The solid-liquid phase change material on the surface of the lithium battery absorbs the heat generated by the lithium battery, causing the temperature of the lithium battery to drop. Since the solid-liquid phase change material has a large latent heat absorption and a small temperature change during the solid-liquid phase change process, it can effectively alleviate the temperature surge and unevenness caused by the high heat flow when the lithium battery is working at high load.

[0052] S2. The heat absorbed by the solid-liquid phase change material is transferred to the corrugated aluminum plate.

[0053] S3. When the drone is started, the cooling fan starts to rotate, providing high-speed air flow through the gaps between the corrugated aluminum plates, conducting convection heat exchange with the corrugated aluminum plates, and taking away the heat on the surface of the corrugated aluminum plates. Since the surface of the corrugated aluminum plate is provided with raindrop-shaped turbulent micro-convexities, it can enhance the air turbulence effect, increase the heat exchange specific surface area, and further enhance the forced convection cooling effect of its surface. In addition, the flow resistance generated by the raindrop-shaped micro-convexities is small, and the heat is discharged from the battery through forced convection heat exchange.

[0054] S4. The two L-shaped heat-conducting aluminum sheets coupled to the outer side of the unit lithium battery pack shell efficiently transfer the heat that is difficult to discharge from the battery to the upper fuselage of the drone for timely release, effectively avoiding local overheating caused by heat accumulation inside the battery pack and further improving the overall heat dissipation and cooling effect.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A lithium battery pack heat dissipation device for a telemetry drone, characterized in that: include: Solid-liquid phase change material (2), corrugated aluminum plate (3), raindrop-shaped spoiler micro-convexity (4), unit lithium battery pack housing (5), L-shaped heat conductive aluminum sheet (6), thermal interface material (7), battery pack housing (8), cooling fan (9) and lithium battery (10); The corrugated aluminum plate (3) is arranged on the two outer surfaces of the lithium battery (10) with the largest surface area, the solid-liquid phase change material (2) is arranged in the interval space between the lithium battery (10) and the corrugated aluminum plate (3), and the raindrop-shaped spoiler micro-convex (4) is arranged on the surface of the corrugated aluminum plate (3); three lithium batteries (10) provided with solid-liquid phase change material (2), corrugated aluminum plate (3) and raindrop-shaped spoiler micro-convex (4) are arranged in parallel to form a unit lithium battery group, a unit lithium battery group shell (5) is arranged around the unit lithium battery group, and two L-shaped heat-conducting aluminum sheets (6) are arranged on the unit lithium battery group shell (5); three groups of unit lithium battery groups provided with unit lithium battery group shells (5) and L-shaped heat-conducting aluminum sheets (6) form a lithium battery pack, a battery pack shell (8) is arranged around the lithium battery pack, and three cooling fans (9) are evenly arranged on the air inlet side of the battery pack shell (8).

2. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: Four raindrop-shaped spoiler micro-protrusions (4) are evenly arranged on the surface of the corrugated aluminum plate (3), and the raindrop-shaped spoiler micro-protrusions (4) are staggeredly arranged on adjacent corrugated aluminum plates (3).

3. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: The vertical portion of the L-shaped heat-conducting aluminum sheet (6) is coupled to the right surface (①) of the unit lithium battery pack housing (5) through a thermal interface material (7); the horizontal portion of the L-shaped heat-conducting aluminum sheet (6) protrudes from the upper surface of the battery pack housing (8) and is coupled to the upper fuselage (1) of the drone.

4. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: The material of the corrugated aluminum plate (3) is metal aluminum, with a thickness of 0.5 mm, a plate length of 60 mm, a width of 40 mm, and a wave height of 2 mm.

5. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: The material of the raindrop-shaped spoiler micro-protrusion (4) is metal aluminum and has a length of 3.4 mm.

6. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: The material of the unit lithium battery pack casing (5) is metal aluminum, with a thickness of 0.5 mm, a length of 60 mm, a width of 40 mm and a height of 36 mm.

7. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: The L-shaped heat-conducting aluminum sheet (6) has a thickness of 0.5 mm, a width of 2 mm, a height of the vertical portion of 58 mm, and a length of the horizontal portion of 50 mm.

8. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: The battery pack housing (8) is made of metal aluminum with a thickness of 0.5 mm, a length of 182 mm, a width of 40 mm and a height of 37 mm.

9. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: The outer diameter of the heat dissipation fan (9) is 35 mm, and the length of the blade is 28 mm.

10. The lithium battery pack heat dissipation device for a remote sensing drone according to claim 1, characterized in that: The lithium battery (10) has a length of 60 mm, a width of 40 mm and a height of 8 mm.

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