Dual-mode rapid-cooling high-specific-energy unmanned aerial vehicle lithium battery module

Abstract

The utility model discloses a dual-mode fast-cooling high-specific-energy unmanned aerial vehicle lithium battery module which comprises a battery cell module and a sealed fixed shell assembly arranged on the battery cell module, the battery cell module comprises a plurality of battery cell monomers, and a battery cell gap is formed between every two adjacent battery cell monomers; the sealing and fixing shell assembly comprises a fixed bottom cover and a sealing top cover which are respectively mounted at the bottoms and the tops of the plurality of battery cell monomers; waterproof glue sealing layers and high-heat-conductivity waterproof glue sealing layers are correspondingly filled between the fixed bottom cover and the bottoms and the tops of the plurality of battery cell monomers and between the sealing top cover and the bottoms and the tops of the plurality of battery cell monomers. According to the lithium battery module disclosed by the utility model, the plurality of battery cell monomers are fixed in the sealed fixed shell assembly and the battery cell gaps are formed, so that the heat transfer area between the battery cell module and air is increased, the heat dissipation efficiency of the lithium battery module is improved, the rapid cooling and rapid charging of the lithium battery module are realized, and the service life of the lithium battery module is prolonged. And the lithium battery module is simple in structure, reasonable in design, low in manufacturing cost and suitable for the field of unmanned aerial vehicles.

Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicle batteries, and in particular relates to a dual-mode fast-cooling high-energy-density unmanned aerial vehicle lithium battery module. Background Art

[0002] At present, with the rapid development of drone technology, lithium battery modules are widely used in agricultural drones. During the flight operation of agricultural drones, a large amount of heat is generated when the lithium battery module is discharged at a high rate. The heat needs to be conducted by the metal shell on the outside of the lithium battery module. Most metal shells on the market are integral sealed structures. This type of metal shell has low heat dissipation efficiency and heavy weight, which affects the cycle life of the lithium battery module. And when the lithium battery module is discharged, the temperature of the lithium battery module will be too high. If it cannot be charged quickly or the charging current is very small in the first time, the charging time of the lithium battery module will be prolonged, that is, the lithium battery module cannot be fully charged quickly, which directly greatly reduces the user's frequency of use. In addition, the commonly used lithium battery module combination method is single and fixed, and it is not possible to effectively expand or reduce the combination at any time.

[0003] Therefore, it is necessary to provide a dual-mode fast-cooling high-energy-density lithium battery module that is easy to dissipate heat quickly. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a dual-mode fast-cooling high-energy-density UAV lithium battery module in view of the deficiencies of the above-mentioned prior art. The lithium battery module increases the heat transfer area between the battery module and the air by setting a plurality of battery cells fixed in a sealed fixed housing assembly and forming a battery cell gap, thereby improving the heat dissipation efficiency of the lithium battery module, facilitating the rapid cooling of the lithium battery module, realizing rapid cooling and rapid charging of the lithium battery module, and increasing the use frequency of the lithium battery module, thus solving the problem that the existing UAV lithium battery module has low heat dissipation efficiency and cannot be quickly charged, and the use frequency is reduced.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a dual-mode fast-cooling high-energy-density UAV lithium battery module, characterized in that it includes a battery cell module and a sealed fixed shell assembly arranged on the battery cell module, the battery cell module includes a plurality of battery cell monomers, and a battery cell gap is formed between adjacent multiple battery cell monomers, the sealed fixed shell assembly includes a fixed bottom cover and a sealed top cover, and the fixed bottom cover and the sealed top cover are respectively installed at the bottom and top of the multiple battery cell monomers, a waterproof glue sealing layer is filled between the fixed bottom cover and the bottom of the multiple battery cell monomers, and a high thermal conductivity waterproof glue sealing layer is filled between the sealed top cover and the top of the multiple battery cell monomers.

[0006] The above-mentioned dual-mode fast-cooling high-energy-density UAV lithium battery module is characterized in that a through opening is opened at the bottom of the fixed bottom cover, and a plurality of paired partitions are arranged between the through opening and a group of opposite sides in the fixed bottom cover, and a battery cell installation cavity for accommodating a single battery cell is formed between the plurality of paired partitions.

[0007] The above-mentioned dual-mode fast-cooling high-energy-density UAV lithium battery module is characterized in that a fixing piece is installed at the bottom corner of the fixed bottom cover.

[0008] The above-mentioned dual-mode fast-cooling high-energy-density UAV lithium battery module is characterized in that the top ends of the multiple battery cells are connected by a connecting plate.

[0009] The above-mentioned dual-mode fast-cooling high-energy-density UAV lithium battery module is characterized in that a temperature probe and a metal sheet are welded on the connecting plate.

[0010] The above-mentioned dual-mode fast-cooling high-energy-density UAV lithium battery module is characterized in that the top ends of the multiple battery cells are provided with positive / negative output terminals and wiring harness terminals, and the sealed top cover is provided with positive / negative output terminal output holes for the positive / negative output terminals to extend out, and wiring harness terminal output holes for the wiring harness terminals to extend out.

[0011] The above-mentioned dual-mode fast-cooling high-energy-density UAV lithium battery module is characterized in that the sealing top cover is made of metal.

[0012] The above-mentioned dual-mode fast-cooling high-energy-density UAV lithium battery module is characterized in that an insulating sheet is pasted on the outer surface of the two outermost battery cells in the battery cell module, a perforated insulating sheet is provided on the outer surface perpendicular to the side surfaces of the multiple battery cell cells, and a combined sponge is pasted between adjacent battery cell cells.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The lithium battery module of the utility model is provided with a plurality of battery cells fixed in a sealed fixed shell assembly, and a battery cell gap is formed between the adjacent battery cells, thereby increasing the heat transfer area between the battery cell module and the air, so that wind or water enters the battery cell gap to quickly take away the discharge heat of each battery cell, thereby improving the heat dissipation efficiency of the lithium battery module, facilitating the rapid cooling of the lithium battery module, realizing fast cooling and fast charging of the lithium battery module, and shortening the shelf time of the lithium battery module after discharge, thereby realizing charging upon landing, increasing the use frequency of the lithium battery module, and being suitable for use in drones.

[0015] 2 The lithium battery module of the utility model opens a through hole at the bottom of the fixed bottom cover, providing a channel for the wind generated by the drone during flight to enter the gap between the battery cells from the bottom of the lithium battery module, thereby extending the wind action path and further improving the heat dissipation efficiency of the lithium battery module; at the same time, multiple groups of paired partitions are arranged to separate multiple battery cells to achieve size control of the battery gap, thereby achieving regulation of the heat dissipation efficiency of the lithium battery module.

[0016] 3. The lithium battery module of the utility model is provided with a plurality of battery cells and installed respectively in the battery cell installation cavity, so that the storage performance of the lithium battery module can be adjusted by increasing or decreasing the number of battery cells, and the battery cells are easy to install and disassemble, breaking through the conventional single fixed combination mode and meeting the needs of different application scenarios.

[0017] 4. The lithium battery module of the utility model improves the waterproof performance of the lithium battery module by filling a waterproof glue sealing layer between the fixed bottom cover and the bottom of the multiple battery cells, and filling a high thermal conductivity waterproof glue sealing layer between the sealed top cover and the top of the multiple battery cells, which is beneficial to promote the conduction of discharge heat in the multiple battery cells and further improves the heat dissipation efficiency of the lithium battery module.

[0018] 5. The lithium battery module of the utility model has a simple structure, reasonable design, low manufacturing cost, and is suitable for promotion and application.

[0019] The technical solution of the utility model is further described in detail below through the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural explosion diagram of the utility model dual-mode fast-cooling high-energy-density UAV lithium battery module.

[0021] Figure 2 This is a schematic diagram of the structure of the fixed bottom cover in the dual-mode fast-cooling high-energy-density UAV lithium battery module of the utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the utility model dual-mode fast-cooling high-energy-density UAV lithium battery module.

[0023] Figure 4 This is the left view of the structure of the dual-mode fast-cooling high-energy-density UAV lithium battery module of the utility model.

[0024] Description of reference numerals:

[0025] 1—insulating sheet with holes; 2—fixed bottom cover; 2-1—partition plate;

[0026] 2-2—cell installation cavity; 2-3—fixing piece; 3—insulating sheet;

[0027] 4—cell; 5—sealed top cover; 5-1—positive / negative output terminal output hole;

[0028] 5-2—Wire harness terminal output hole; 6—Positive / negative output terminal; 7—Wire harness terminal;

[0029] 8—Connecting plate; 8-1—Temperature probe; 8-2—Metal sheet;

[0030] 9—combined sponge; 10—cell gap. DETAILED DESCRIPTION

[0031] Example 1

[0032] like Figure 1 As shown, the dual-mode fast-cooling high-energy-density UAV lithium battery module of this embodiment includes a battery cell module and a sealed fixed shell assembly arranged on the battery cell module, the battery cell module includes a plurality of battery cell monomers 4, and a battery cell gap 10 is formed between adjacent plurality of battery cell monomers 4, the sealed fixed shell assembly includes a fixed bottom cover 2 and a sealed top cover 5, and the fixed bottom cover 2 and the sealed top cover 5 are respectively installed at the bottom and top of the plurality of battery cell monomers 4, a waterproof glue sealing layer is filled between the fixed bottom cover 2 and the bottom of the plurality of battery cell monomers 4, and a high thermal conductivity waterproof glue sealing layer is filled between the sealed top cover 5 and the top of the plurality of battery cell monomers 4.

[0033] The dual-mode fast-cooling high-energy-density UAV lithium battery module of the present embodiment includes two major parts, namely a battery cell module for storing electricity and energy, and a sealed and fixed shell assembly arranged on the battery cell module to seal and fix the battery cell module. By arranging multiple battery cell units 4 in the battery cell module, the energy density and energy storage capacity of the lithium battery are improved, and high specific energy performance is achieved; at the same time, battery cell gaps 10 are formed between adjacent multiple battery cell units 4. After the wind enters each battery cell gap 10, it contacts the side surfaces of the multiple battery cell units 4, thereby increasing the heat transfer area between the battery cell module and the air. After the wind is discharged, the heat generated by the high-rate discharge of each battery cell unit 4 in the battery cell module during use is taken away from the side, thereby improving the heat dissipation efficiency of the lithium battery module, which is beneficial to the rapid charging and discharging of the lithium battery module. Similarly, when the lithium battery module of this embodiment is placed in an air-cooled box or a flowing water-cooled box, wind or flowing water is used to enter the gaps 10 between the battery cells to efficiently dissipate the heat from the sides of each battery cell 4, thereby rapidly cooling the lithium battery module and achieving fast cooling and fast charging of the lithium battery module, thereby achieving dual-mode fast cooling performance of water cooling and air cooling, which is suitable for unmanned aerial vehicle groups with larger charging and discharging.

[0034] In addition, by using multiple battery cells 4 to form a battery module, it is convenient to adjust the power storage performance of the lithium battery module by increasing or decreasing the number of battery cells 4 to meet the actual use requirements of the lithium battery module in different application scenarios.

[0035] The lithium battery module of this embodiment is provided with a fixed bottom cover 2 and a sealing top cover 5 and is respectively installed at the bottom and top of a plurality of battery cells 4, so that the dispersed plurality of battery cells 4 are assembled into an integral structure to form a battery cell module, thereby simplifying the battery cell module structure. At the same time, by filling a waterproof glue sealing layer between the fixed bottom cover 2 and the bottom of the plurality of battery cells 4, and filling a high thermal conductivity waterproof glue sealing layer between the sealing top cover 5 and the top of the plurality of battery cells 4, the plurality of battery cells 4 are firmly fixed in the sealed fixed housing assembly, thereby ensuring the overall stability of the lithium battery module and improving the waterproof performance of the end of the lithium battery module. At the same time, all devices wrapped in the inner cavity of the sealing top cover 5 are fully covered by the high thermal conductivity waterproof glue sealing layer, which is conducive to promoting the conduction of discharge heat in the plurality of battery cells 4, and further improving the heat dissipation efficiency of the lithium battery module. Usually, the surfaces of the plurality of battery cells 4 except the top and the bottom are all covered with an insulating, corrosion-resistant and wear-resistant aluminum-plastic film.

[0036] Typically, multiple battery cells 4 are arranged in a vertical direction and are parallel to each other. The fixed bottom cover 2 and the sealing top cover 5 are vertically installed at the bottom and top of the multiple battery cells 4, respectively, so that the lithium battery module has a compact structure and a regular appearance, thereby expanding its application range.

[0037] like Figure 2 As shown, further, a through opening is opened at the bottom of the fixed bottom cover 2, and a plurality of paired partitions 2-1 are arranged between the through opening and a group of opposite sides in the fixed bottom cover 2, and a battery cell installation cavity 2-2 for accommodating a single battery cell 4 is formed between the plurality of paired partitions 2-1.

[0038] The lithium battery module of this embodiment opens a through hole at the bottom of the fixed bottom cover 2 as a reserved air duct, providing a channel for the wind generated by the drone during flight to enter from the bottom of the lithium battery module, and then enter the battery cell gap 10 and exhaust from the side, realizing different-path wind inlet and outlet, extending the wind action path, and further improving the heat dissipation efficiency of the lithium battery module; at the same time, a plurality of groups of paired partitions 2-1 are arranged between the through hole and a group of relative side edges in the fixed bottom cover 2, that is, a group of relative side edges are selected in the fixed bottom cover 2, and then a plurality of partitions 2-1 are arranged on the bottom plate of the fixed bottom cover 2 between it and the through hole, and the partitions 2-1 correspond to each other at the relative side positions to form a group of paired partitions 2-1 respectively. Usually, a plurality of groups of paired partitions 2-1 are arranged in parallel, and the cavity formed between the plurality of adjacent paired partitions 2-1 is used as the battery cell monomer installation cavity 2-2 for placing and accommodating a single The battery cell 4, which is usually located at the outermost two groups of partitions 2-1 and the cavity formed between the other group of opposite sides in the fixed bottom cover 2, can also be used as a battery cell installation cavity 2-2, and the thickness of the paired partitions 2-1 is also equal, so that the paired partitions 2-1 are used to separate multiple battery cells 4. On the one hand, the battery cell installation cavity 2-2 is used as the installation place of a single battery cell 4, which improves the installation stability of the battery cell 4 and facilitates the installation, disassembly, replacement and maintenance of a single battery cell 4. On the other hand, it ensures that multiple battery cells 4 form a battery gap 10 at the opening, and the width of the battery gap 10 is greater than or equal to the thickness of the partition 2-1, so that the spatial size of the battery gap 10 is controlled by controlling the thickness of the partition 2-1, and then the heat dissipation efficiency of the battery cell 4 is controlled, so as to achieve a balance between the energy storage performance and the heat dissipation efficiency of the lithium battery module.

[0039] like Figure 2 As shown, further, a fixing part 2-3 is installed at the bottom corner of the fixed bottom cover 2. The lithium battery module of this embodiment is fixed with the battery pack housing as a whole by installing a fixing part 2-3 at the bottom corner of the fixed bottom cover 2, and a nut is usually selected as the fixing part 2-3 to avoid position movement and ensure the stability of the overall structure.

[0040] like Figure 1 and Figures 3-4 As shown, further, the top ends of the plurality of battery cells 4 are connected by a connecting plate 8. The lithium battery module of this embodiment connects the top ends of the plurality of battery cells 4 into one body by providing a connecting plate 8, thereby improving the installation stability of the top ends of the plurality of battery cells 4, thereby improving the overall stability of the lithium battery module and preventing the battery cells 4 from loosening and slipping.

[0041] like Figure 3As shown, further, a temperature probe 8-1 and a metal sheet 8-2 are welded on the connecting plate 8. In this embodiment, the temperature probe 8-1 is fixed on the top of the battery module to detect the problem of the battery module and feed it back to the BMS system (battery steward system), so that the current of the battery module in different temperature ranges can be controlled by the BMS system, thereby protecting the battery pack from working normally within the set temperature range, thereby ensuring the number of cycles of the battery pack; by arranging the metal sheet 8-2 on the connecting plate 8, it is convenient to fix the connection point pole ears together by welding, and at the same time, the metal sheet 8-2 is used to feed back the voltage signal to the wiring harness terminal 7, and the metal sheet 8-2 can also be used for heat conduction when the temperature rise is high during the charging and discharging process.

[0042] like Figure 3 As shown, further, the tops of the multiple battery cells 4 are provided with positive / negative output terminals 6 and wiring harness terminals 7, and the sealed top cover 5 is provided with positive / negative output terminal output holes 5-1 for the positive / negative output terminals 6 to extend out, and wiring harness terminal output holes 5-2 for the wiring harness terminals 7 to extend out. In this embodiment, positive / negative output terminals 6 are provided at the tops of the multiple battery cells 4 for the total positive / negative output of the battery module, wiring harness terminals 7 are provided for the voltage output of each battery cell, and the signals fed back by the voltage and temperature probes 8-1 are transmitted to the BMS system. Usually, the positive / negative output terminals 6 are connected to the connecting plate 8 above the multiple battery cells 4 by rivet fixing, and the wiring harness terminals 7 are connected to the connecting plate 8 above the multiple battery cells 4 by hot pressing welding / soldering.

[0043] Furthermore, the sealing top cover 5 is made of metal. The lithium battery module of this embodiment is configured to be made of metal, and a high thermal conductivity waterproof adhesive sealing layer is filled between the sealing top cover 5 and the tops of the plurality of battery cells 4, so that the heat generated by the discharge of the plurality of battery cells 4 during use is conducted through the high thermal conductivity waterproof adhesive sealing layer and then conducted out through the sealing top cover 5 made of metal with good thermal conductivity, thereby further improving the heat dissipation efficiency of the lithium battery module.

[0044] like Figure 1As shown, further, an insulating sheet 3 is pasted on the outer surface of the two outermost battery cells 4 in the battery cell module, and a perforated insulating sheet 1 is provided at the outer surface perpendicular to the side of the multiple battery cell cells 4, and a combined sponge 9 is pasted between adjacent battery cell cells 4. In this embodiment, the insulating sheet 3 is pasted on the outer surface of the two outermost battery cell cells 4 in the battery cell module to protect the outermost battery cell cells 4, and a perforated insulating sheet 1 is provided at the outer surface position perpendicular to the side of the multiple battery cell cells 4 to protect the thickness direction of the multiple battery cell cells 4 and avoid damage to the battery cell cells 4; at the same time, the combined sponge 9 is pasted between adjacent battery cell cells 4, and the combined sponge 9 usually includes sponges located at the upper and lower parts of the battery cell cells 4, respectively, to avoid contact and bonding between adjacent battery cell cells 4, and to ensure that gaps are reserved between adjacent battery cell cells 4, so that wind or water flows through the gaps into the side of the battery cell cells 4 for efficient heat dissipation.

[0045] The assembly process of the lithium battery module of the utility model is as follows: the combined sponge 9 is pasted to the upper and lower parts of the battery cell monomer 4, the battery cell monomer installation cavity 2-2 on the inner side of the fixed bottom cover 2 is glued, and then the bottom ends of multiple battery cell monomers 4 are sequentially installed in the battery cell monomer installation cavity 2-2 of the fixed bottom cover 2, the insulating sheet 3 is pasted to the outer surfaces of the two outermost battery cell monomers 4, the insulating sheet 1 with holes is pasted to the outer surface perpendicular to the side of the multiple battery cell monomers 4, and the top ends of the multiple battery cell monomers 4 are connected through the connecting plate 8, and the connecting plate 8 includes a temperature probe 8-1, a metal sheet 8-2 and a wiring harness terminal 7, so as to obtain a battery pack after installation;

[0046] After installation, the battery pack is assembled into a specific fixture, the positive / negative output terminals 6 are fixed into the specific fixture, and laser welding equipment is installed for welding. After welding, the positive and negative output terminals 6 are fixed to the connecting plate 8 with rivets, and the temperature probe 8-1 is fixed to the battery cell 4 with thermal conductive glue. The sealing top cover 5 is installed on the connecting plate 8, and the positive / negative output terminals 6 are output through the positive / negative output terminal output hole 5-1, and the wiring harness terminal 7 is output through the wiring harness terminal output hole 5-2. A high thermal conductivity and waterproof glue sealing layer is filled between the inner cavity of the sealing top cover 5 and the top of the multiple battery cells 4. Finally, the fixing parts 2-3 are installed at the bottom corners of the fixed bottom cover 2 to fix the multiple battery cells 4 and related accessories as a whole.

[0047] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any way. Any simple modification, change and equivalent change made to the above embodiment according to the essence of the utility model technology still falls within the protection scope of the technical solution of the utility model.

Claims

1. A dual-mode fast-cooling high-energy-density UAV lithium battery module, characterized in that: The invention comprises a cell module and a sealed fixed housing assembly arranged on the cell module, wherein the cell module comprises a plurality of cell monomers (4), and a cell gap (10) is formed between the plurality of adjacent cell monomers (4); the sealed fixed housing assembly comprises a fixed bottom cover (2) and a sealed top cover (5), and the fixed bottom cover (2) and the sealed top cover (5) are respectively mounted on the bottom and top of the plurality of cell monomers (4); a waterproof adhesive sealing layer is filled between the fixed bottom cover (2) and the bottom of the plurality of cell monomers (4), and a high thermal conductivity waterproof adhesive sealing layer is filled between the sealed top cover (5) and the top of the plurality of cell monomers (4).

2. A dual-mode fast-cooling high-energy-density UAV lithium battery module according to claim 1, characterized in that: A through opening is provided at the bottom of the fixed bottom cover (2), and a plurality of paired partitions (2-1) are arranged between the through opening and a group of opposite side edges of the fixed bottom cover (2), and a battery cell installation cavity (2-2) for accommodating a single battery cell (4) is formed between the plurality of paired partitions (2-1) adjacent to each other.

3. A dual-mode fast-cooling high-energy-density UAV lithium battery module according to claim 1, characterized in that: A fixing piece (2-3) is installed at the bottom corner of the fixed bottom cover (2).

4. A dual-mode fast-cooling high-energy-density UAV lithium battery module according to claim 1, characterized in that: The top ends of the plurality of battery cell units (4) are connected via a connecting plate (8).

5. A dual-mode fast-cooling high-energy-density UAV lithium battery module according to claim 4, characterized in that: A temperature probe (8-1) and a metal sheet (8-2) are welded to the connecting plate (8).

6. A dual-mode fast-cooling high-energy-density UAV lithium battery module according to claim 1, characterized in that: The top ends of the plurality of battery cells (4) are provided with positive / negative output terminals (6) and wiring harness terminals (7), and the sealed top cover (5) is provided with positive / negative output terminal output holes (5-1) for the positive / negative output terminals (6) to extend out, and wiring harness terminal output holes (5-2) for the wiring harness terminals (7) to extend out.

7. A dual-mode fast-cooling high-energy-density UAV lithium battery module according to claim 1, characterized in that: The sealing top cover (5) is made of metal.

8. The dual-mode fast-cooling high-energy-density UAV lithium battery module according to claim 1, characterized in that: Insulating sheets (3) are adhered to the outer surfaces of the two outermost battery cells (4) in the battery cell module, a perforated insulating sheet (1) is provided on the outer surfaces perpendicular to the sides of the plurality of battery cells (4), and a combined sponge (9) is adhered between adjacent battery cells (4).

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