Unmanned aerial vehicle battery thermal management device based on phase change vapor chamber

Abstract

The utility model discloses an unmanned aerial vehicle battery thermal management device based on a phase-change vapor chamber, which belongs to the technical field of unmanned aerial vehicle batteries, and can utilize cooling airflow generated by unmanned aerial vehicle rotors on a large scale to dissipate heat, and air smoothly enters and exits a battery module through an air channel constructed by a shutter with a specific shape and three-dimensional fins, so that the battery module is prevented from being damaged; therefore, efficient thermal control on the battery is realized; and 2, heat in the battery is quickly conducted out by virtue of the phase change vapor chamber with high thermal conductivity, so that the discharge rate of the battery can be improved on the premise of ensuring the long cycle life of the battery, and the loading capacity of the unmanned aerial vehicle is further greatly improved. And 3, the shell of the battery module completely seals the battery cell through the sealant and physically isolates the battery cell from the outside, so that effective protection such as puncture collision prevention, rainwater and haze particle erosion prevention and the like is provided for the battery cell.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of unmanned aerial vehicle battery thermal management device based on phase change equalizing plate, belong to unmanned aerial vehicle battery technical field. BACKGROUND

[0002] In recent years, large unmanned aerial vehicles are applied in the fields of national defense, agriculture and logistics, etc. With the development of low-altitude economy, unmanned aerial vehicle logistics transportation has broad civilian market prospects, and accordingly higher requirements are put forward for the load-carrying capacity of unmanned aerial vehicles.

[0003] However, the improvement of load-carrying capacity means that the battery needs to be discharged at a higher rate, which will result in more serious heat accumulation, thereby bringing more severe challenges to battery thermal management.

[0004] As disclosed in the application No. 202310631338.6, a kind of unmanned aerial vehicle battery and thermal management control system, according to the battery temperature information obtained by temperature sensor, the control device can adjust the temperature inside the battery box by controlling the working mode of the first semiconductor refrigerating sheet and the second semiconductor refrigerating sheet, ensure that the battery temperature is maintained within a relatively reasonable temperature range, the battery mounting frame is composed of inner frame and outer frame, the inner frame and the outer frame are connected through the shock absorber, which can reduce the influence of the outer frame on the battery mounting frame, the inner recess of the shell is in abutment with the battery mounting frame, and the positioning effect is achieved, the shell positioning groove corresponds to the cover positioning protrusion, a sealing strip is further provided at the connection, which not only increases the sealing property, but also can position the cover, the first inner frame support plate and the second inner frame support plate are respectively provided with a first air duct and a second air duct, which can make the air inside the battery box circulate better, the first air duct and the second air duct are both S-shaped, which can increase the time of air circulation at the battery, and have better temperature control effect on the battery.

[0005] Traditional large unmanned aerial vehicle battery modules are generally installed at the bottom of the unmanned aerial vehicle, and only the heat generated by the battery is transferred to the outside through the battery box shell, so the heat dissipation efficiency is low, which greatly limits the improvement of the discharge rate and load-carrying capacity of the unmanned aerial vehicle battery. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide a kind of unmanned aerial vehicle battery thermal management device based on phase change equalizing plate.

[0007] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0008] A kind of unmanned aerial vehicle battery thermal management device based on phase change equalizing plate, including shell, sealing glue, electric core, phase change equalizing plate and fin;

[0009] The electric core, phase change equalizing plate and fin are fixed inside the shell;The inner wall of the shell is completely sealed with the electric core by the sealing glue;The surface of the phase change equalizing plate is attached to the surface of the electric core.

[0010] The phase change heat plate can pass through the inner wall of the shell to make the end thereof contact with the air outside;

[0011] The extended end of the phase change heat plate is welded and fixed with the fin.

[0012] Preferably, the shell comprises a louver, a mesh, a rib plate and an electrical interface;

[0013] The upper wall of the shell is provided with the electrical interface, the left and right walls are provided with the louvers, and the front and rear walls are provided with the meshes;

[0014] The rib plate is fixed in the shell, and the battery cell is located between the two rib plates.

[0015] Preferably, the rib plate is provided with a series of slits, the phase change heat plate passes out of the slits, and the gap between the rib plate and the phase change heat plate is filled with sealing glue, so that a closed cavity is formed in the shell, and the battery cell is a completely sealed structure.

[0016] Preferably, the phase change heat plate can be unidirectionally extended from one end of the closed cavity or bidirectionally extended from two ends.

[0017] The extended end of the phase change heat plate can be bent.

[0018] Preferably, the battery cell and the phase change heat plate are placed horizontally, vertically or obliquely.

[0019] Preferably, the phase change heat plate is placed between every two battery cells or between a battery cell group composed of two or at least two battery cells.

[0020] Preferably, the fins are arranged on the extended end of the phase change heat plate through welding.

[0021] Preferably, the transverse spacing, longitudinal spacing or inclination angle between the fins is an adjustable structure.

[0022] Preferably, the base material of the phase change heat plate comprises but is not limited to metal, ceramic and high molecular polymer.

[0023] Preferably, the working medium in the phase change heat plate comprises deionized water, acetone, freon or anhydrous ethanol.

[0024] The beneficial technical effects of the utility model are as follows:

[0025] The utility model provides a kind of unmanned aerial vehicle battery thermal management device based on phase change heat plate,

[0026] 1. When the drone is working, the heat generated by the battery cell is transferred to the phase change heat exchanger, which then transfers the heat to the fins. The battery module is suspended at the bottom of the drone. The lateral airflow generated by the drone rotor can enter through the louvers at both ends and exchange heat with the fins via convection. At the same time, the airflow is guided by the three-dimensional fins and flows out through the mesh at both ends. This device can utilize the cooling airflow generated by the drone rotor for heat dissipation on a large scale. By constructing air ducts with specific shapes of louvers and three-dimensional fins, the airflow can smoothly enter and exit the battery module, thereby achieving efficient thermal control of the battery.

[0027] 2. Lithium batteries generate a large amount of heat during high-rate discharge. Traditional battery modules only dissipate heat through the outer casing, resulting in low heat dissipation efficiency. Consequently, the battery discharge rate is limited, and the load capacity is poor. This device utilizes a phase-change heat sink with high thermal conductivity to rapidly dissipate heat from inside the battery. This allows for increased battery discharge rate while maintaining a high cycle life, thereby significantly improving the payload capacity of the drone.

[0028] 3. The battery module casing completely seals the battery cell with sealant and physically isolates it from the outside world, providing effective protection against punctures, impacts, rain, and smog particles. Attached Figure Description

[0029] Figure 1 This is a front sectional view of a preferred embodiment of a UAV battery thermal management device based on a phase change heat spreader according to the present invention.

[0030] Figure 2 This is a three-dimensional structural diagram of a preferred embodiment of a UAV battery thermal management device based on a phase change heat spreader according to the present invention.

[0031] Figure 3 This is a schematic diagram of the air duct of a preferred embodiment of a UAV battery thermal management device based on a phase change heat spreader according to the present invention.

[0032] In the diagram: 1. Shell; 2. Sealant; 3. Battery cell; 4. Phase change heat spreader; 5. Fins; 11. Louver; 12. Mesh; 13. Rib; 14. Electrical interface. Detailed Implementation

[0033] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0034] like Figure 1 - Figure 3As shown, this embodiment provides a UAV battery thermal management device based on a phase change heat spreader, including a housing 1, a sealant 2, a battery cell 3, a phase change heat spreader 4, and fins 5.

[0035] Inside the housing 1, a battery cell 3, a phase change heat spreader 4, and fins 5 are fixed; sealant 2 completely seals the inner wall of the housing 1 to the battery cell 3; the surface of the phase change heat spreader 4 is attached to the surface of the battery cell 3.

[0036] The phase change heat spreader 4 can pass through the inner wall of the shell 1 so that its end is in contact with the outside air;

[0037] The extended end of the phase change heat spreader 4 is welded and fixed to the fins 5.

[0038] The housing 1 includes louvers 11, mesh 12, ribs 13 and electrical interface 14;

[0039] An electrical interface 14 is provided on the upper wall of the housing 1, louvers 11 are opened on the left and right walls, and mesh 12 are opened on the front and rear walls.

[0040] The rib plate 13 is fixed inside the housing 1, and the battery cell 3 is located between the two rib plates 13.

[0041] The rib 13 has a series of slits through which the phase change heat spreader 4 passes and the gap between the rib 13 and the phase change heat spreader 4 is filled by sealant 2, so that a sealed cavity is formed inside the housing 1 and the cell 3 is a completely sealed structure.

[0042] The phase change heat spreader 4 can extend unidirectionally from one end of the sealed cavity or bidirectionally from both ends.

[0043] The extended ends of the phase change heat spreader can be bent.

[0044] The battery cell 3 and the phase change heat spreader 4 can be placed horizontally, vertically, or at an angle.

[0045] The phase change heat spreader 4 is placed between every two cells 3 or between a group of cells consisting of two or at least two cells 3.

[0046] The fins 5 are fixedly arranged on the extended end of the phase change heat exchange plate 4 by welding.

[0047] The transverse spacing, longitudinal spacing, or tilt angle between the fins 5 are adjustable.

[0048] The substrate material of the phase change heat spreader 4 is a metallic material.

[0049] The working fluid inside the phase change heat spreader 4 includes deionized water, acetone, Freon, or anhydrous ethanol.

[0050] like Figure 1 - Figure 3As shown in the figure, the working process of the UAV battery thermal management device based on a phase change heat spreader provided in this embodiment is as follows:

[0051] Step 1: Louvers 11 are opened on the outer wall of the shell 1. The shell 1 contains a battery cell 3 and a phase change thermal control device, and the two are tightly attached to each other. The gaps are filled with sealant 2 to completely seal the battery cell 3. The heat between the battery cells 3 is transferred to the fins 5 through the phase change thermal control device. The fins 5 exchange heat with the cooling airflow generated by the external UAV rotor.

[0052] Step 2: The louvers 11 on the side wall of the device are made by metal stamping process, and their openings are angled upwards, which is conducive to the airflow of the rotor flowing in from the side and above.

[0053] Step 3: The incoming gas comes into full contact with the three-dimensional fins 3, and after being guided by the air duct formed by the fins 3, it flows out from the mesh 12 on the front and rear side walls of the device, thereby carrying away the heat inside the battery module and achieving efficient thermal control.

[0054] Example

[0055] like Figure 1 - Figure 3 As shown, it includes a housing 1, a sealant 2, a battery cell 3, a phase change heat spreader 4, and fins 5; the battery cell 3, the phase change heat spreader 4, and the fins 5 are fixed inside the housing 1; the surface of the phase change heat spreader 4 is attached to the surface of the battery cell 3, and the gap between the two contact surfaces is filled with thermally conductive silicone grease to further reduce thermal resistance.

[0056] The housing 1 includes louvers 11, mesh 12, ribs 13, and electrical interface 14; the electrical interface 14 is provided on the upper wall of the housing 1, the louvers 11 are opened on the left and right walls, and the mesh 12 is opened on the front and rear walls; the two ribs 13 are fixed in the center of the interior of the housing 1, and the battery cell 3 is located between the two ribs 13.

[0057] The rib plate 13 has a series of slits, and the phase change heat spreader 4 can pass through the slits of the rib plate 13 so that its end is in contact with the outside air; the gap between the rib plate 13 and the phase change heat spreader 4 is filled by the sealant 2, so that a sealed cavity is formed inside the housing 1, thereby completely sealing the battery cell 3 and physically isolating the battery cell 3 from the outside world, preventing water, gas and particulate matter from damaging the battery cell; the phase change heat spreader 4 extends out from both ends of the sealed cavity in both directions, and the extended ends are welded and fixed to the fins 5;

[0058] Each of the phase change heat spreaders 4 is placed between every two of the battery cells, and both are placed horizontally;

[0059] The coverage area of ​​the phase change heat spreader 4 is greater than the contact surface area of ​​the battery cell 3.

[0060] The fins 5 are fixedly arranged on the extended end of the phase change heat exchange plate 4 by welding; the fins 5 on the same extended end are divided into two groups, and are arranged at equal intervals at an angle of 45 degrees to the left and right with the center position of the phase change heat exchange plate 4 in the length direction as the dividing line, forming a flow channel to guide the airflow out from the two mesh walls respectively.

[0061] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A thermal management device for a drone battery based on a phase change heat spreader, characterized in that: It includes a shell (1), sealant (2), battery cell (3), phase change heat spreader (4) and fins (5); Inside the housing (1) are fixed the battery cell (3), the phase change heat spreader (4) and the fins (5); the sealant (2) completely seals the inner wall of the housing (1) with the battery cell (3); the surface of the phase change heat spreader (4) is attached to the surface of the battery cell (3); The phase change heat spreader (4) can pass through the inner wall of the shell (1) so that its end is in contact with the outside air; The extended end of the phase change heat spreader (4) is welded and fixed to the fins (5); The housing (1) includes louvers (11), mesh (12), ribs (13) and electrical interface (14). The upper wall of the housing (1) is provided with an electrical interface (14), the left and right walls are provided with louvers (11), and the front and rear walls are provided with mesh (12). The ribs (13) are fixed inside the housing (1), and the battery cell (3) is located between the two ribs (13); The rib (13) has a series of slits, the phase change heat spreader (4) passes through the slits and the gap between the rib (13) and the phase change heat spreader (4) is filled by sealant (2), so that a sealed cavity is formed inside the shell (1) and the cell (3) is a completely sealed structure. The phase change heat spreader (4) can extend from one end of the sealed cavity in one direction or from both ends in two directions; The extended end of the phase change heat spreader (4) can be bent.

2. The UAV battery thermal management device based on a phase change heat spreader according to claim 1, characterized in that: The battery cell (3) and the phase change heat spreader (4) can be placed horizontally, vertically, or obliquely.

3. The UAV battery thermal management device based on a phase change heat spreader according to claim 1, characterized in that: The phase change heat spreader (4) is placed between every two cells (3) or between a group of cells consisting of at least two cells (3).

4. The UAV battery thermal management device based on a phase change heat spreader according to claim 3, characterized in that: The fins (5) are fixedly arranged on the extended end of the phase change heat spreader (4) by welding.

5. A UAV battery thermal management device based on a phase change heat spreader according to claim 2, characterized in that: The transverse spacing, longitudinal spacing, or tilt angle between the fins (5) is adjustable.

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