Heat dissipation device for lithium battery pack of landing instant charging unmanned aerial vehicle

Abstract

The utility model discloses a heat dissipation device for a lithium battery pack of a landing immediate charging unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicle batteries. According to the utility model, efficient heat dissipation during discharging of the battery pack is realized through the plug-in heat dissipation device. The radiating device is inserted between the metal barrels, the radiating fins are in large-area contact with the metal barrels, heat is quickly conducted, and the radiating efficiency is remarkably improved. The radiating device is composed of a plurality of radiating fins and transverse rods, and the transverse rods are perpendicularly connected with the side faces of the radiating fins to form a stable structure. The radiating fins are consistent with the metal barrels in thickness and are inserted from one side without a cross rod, so that the internal space of the battery pack is fully utilized, and the structure is compact. The expansion sponge is arranged between the adjacent battery cell monomers, so that expansion force is absorbed, damage is prevented, heat dissipation is assisted, and the service life of the battery cell is prolonged. The heat dissipation device can be quickly replaced, the temperature of the battery cell is effectively reduced, immediate charging after landing is achieved, the downtime of the plant protection unmanned aerial vehicle is shortened, and the working efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to unmanned aerial vehicle battery technical field, concretely relates to a heat dissipation device for landing just charging unmanned aerial vehicle lithium battery pack. BACKGROUND

[0002] With the rapid development of unmanned aerial vehicle technology, lithium battery module is increasingly widely used in plant protection unmanned aerial vehicle. However, in the flight operation of plant protection unmanned aerial vehicle, lithium battery module will generate a large amount of heat when high-rate discharging, and the heat resistance of lithium battery itself is limited. At present, most of the lithium battery packs on the market mainly rely on the metal shell outside the module to conduct heat, and the heat dissipation effect is not ideal.

[0003] In order to realize "landing just charging", the existing solutions mainly include the following two kinds: one is to cool down through the charging process, so that the initial temperature of the battery before discharging is low, thereby reducing the end temperature after discharging. However, the heat dissipation effect of this scheme is not ideal, and the battery pack still needs to be cooled down before charging after discharging, which undoubtedly increases the operation time and reduces the operation efficiency. The second is to develop higher temperature-resistant battery cells to improve the heat resistance of the battery. However, this scheme has high technical requirements, high research and development cost and limited improvement, which is difficult to truly realize "landing just charging", and also affects the operation efficiency of plant protection unmanned aerial vehicle.

[0004] In summary, the existing technology has the problem of poor heat dissipation effect, which reduces the operation efficiency of plant protection unmanned aerial vehicle. INVENTION CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a heat dissipation device for landing just charging unmanned aerial vehicle lithium battery pack, which is novel and reasonable in design, simple in structure, practical and easy to use and promote.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of:

[0007] A heat dissipation device for landing just charging unmanned aerial vehicle lithium battery pack, which is used for inserting the battery pack during discharging to realize heat dissipation;

[0008] The battery pack comprises a bottom shell and a head cover;A plurality of metal barrels of rectangular structure are installed between the bottom shell and the head cover, a plurality of battery cell monomers are arranged in the metal barrels, expansion sponge is arranged between the adjacent battery cell monomers, and a plurality of limiting grooves are uniformly arranged in the bottom shell for installing the metal barrels;

[0009] The heat dissipation device comprises a plurality of uniformly arranged heat dissipation fins and a horizontal rod, the horizontal rod is perpendicular to the heat dissipation surface of the heat dissipation fin, and the horizontal rod is sequentially connected with the side surface of the heat dissipation fin;

[0010] The thickness of the heat dissipation fin is consistent with the interval between adjacent metal barrels, and the heat dissipation device is used for inserting between the metal barrels from the side where the cross rod is not arranged, so as to realize heat dissipation of the battery monomer.

[0011] Further, the metal barrel and the heat dissipation fin are connected through a sliding structure, and the sliding direction of the sliding structure is perpendicular to the cross rod.

[0012] Further, the sliding structure comprises a sliding groove and a guide strip, the sliding groove is arranged on the metal barrel, and the guide strip is integrally formed on the heat dissipation fin.

[0013] Further, the sliding groove and the guide strip are provided with two upper and lower ones respectively, and the upper and lower sliding grooves and the guide strips are slidably connected respectively.

[0014] Further, two battery monomers are arranged in the metal barrel.

[0015] Further, the cross rod is provided with two upper and lower cross rods.

[0016] Further, the cross rod and the heat dissipation fin are slidably connected on the side surface of the heat dissipation fin, the side surface of the heat dissipation fin is provided with a dovetail groove, and the cross rod is a trapezoidal guide rail structure matched with the dovetail groove.

[0017] Further, the cross rod is provided with a connecting hole, and the bolt is connected with the bottom of the dovetail groove through the locking hole, so as to realize the locking of the position of the heat dissipation fin.

[0018] Further, the heat dissipation fin comprises a metal shell, and the metal shell is filled with a phase change material.

[0019] Further, the heat dissipation device is provided with a handle on one side of the cross rod, which is used for extracting and inserting the heat dissipation device.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] The heat dissipation device for the lithium battery pack of the unmanned aerial vehicle is inserted into the metal barrels to enable the metal barrels and the fins in the heat dissipation device to be in large-area contact and quickly conduct heat, thereby significantly improving the heat dissipation efficiency, and the heat dissipation device can be quickly replaced after absorbing heat. The heat dissipation device comprises a plurality of uniformly arranged fins and a crossbar, the crossbar is perpendicular to the heat dissipation surface of the fins and is sequentially connected with the side surface of the fins to form a stable structure. The thickness of the fins is consistent with the interval between the adjacent metal barrels, the heat dissipation device is inserted between the metal barrels from the side where the crossbar is not arranged, the space inside the battery pack is fully utilized, the occupation of additional space is avoided, and the structure of the entire battery pack is more compact. The expansion sponge is arranged between the adjacent battery monomers to effectively absorb the expansion force generated by the battery monomers during charging and discharging, prevent the battery monomers from being damaged by mutual extrusion, further improve the heat dissipation effect, and prolong the service life of the battery monomers. Since the heat dissipation device can effectively reduce the temperature of the battery monomers, the battery pack can be directly charged after discharging without long-term cooling, the "landing charging" is truly realized, the downtime of the plant protection unmanned aerial vehicle is greatly shortened, and the operation efficiency is significantly improved.

[0022] The technical scheme of the utility model will be described in further detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is a structure schematic view of the heat dissipation device for the lithium battery pack of the unmanned aerial vehicle of the utility model in the use state of the embodiment;

[0024] Fig. 2 It is a structure schematic view of the heat dissipation device for the lithium battery pack of the unmanned aerial vehicle of the utility model in the use state of the embodiment;

[0025] Fig. 3 It is a structure schematic view of the heat dissipation device for the lithium battery pack of the unmanned aerial vehicle of the utility model in the use state of the embodiment;

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, battery pack; 11, bottom shell; 12, head cover; 13, metal barrel; 14, sliding groove;

[0028] 2, heat dissipation device; 21, fin; 211, guide bar; 212, heat dissipation surface;

[0029] 22, crossbar; 23, dovetail groove; 24, handle;

[0030] 3, bolt. DETAILED DESCRIPTION

[0031] Example of a heat dissipation device for lithium battery packs in drones that can be charged immediately upon landing:

[0032] like Figs. 1-3 As shown, a heat dissipation device 2 is used for the lithium battery pack of a drone that can be charged immediately upon landing. This heat dissipation device 2 is used to dissipate heat from the battery pack 1 during discharge.

[0033] like Fig. 3 As shown, the battery pack 1 includes a bottom shell 11 and a top cover 12; a plurality of rectangular metal barrels 13 are installed between the bottom shell 11 and the top cover 12, and a plurality of individual battery cells are disposed inside the metal barrels 13. Expansion sponges are disposed between adjacent individual battery cells. A plurality of limiting grooves are uniformly disposed inside the bottom shell 11 for installing the metal barrels 13.

[0034] To ensure the drone battery pack 1 can continue to function properly after the heat dissipation device 2 is installed, the heat dissipation device 2 includes multiple evenly arranged heat sinks 21 and crossbars 22. The crossbars 22 are perpendicular to the heat dissipation surface 212 of the heat sinks 21 and are sequentially connected to the sides of the multiple heat sinks 21. Heat is dissipated through the heat sinks 21, and the crossbars 22 assemble the heat sinks 21 for easy insertion into the battery pack 1.

[0035] In order to ensure that the heat dissipation device 2 can be matched with the battery pack 1, the thickness of the heat dissipation fin 21 is consistent with the spacing between the adjacent metal barrels 13. The heat dissipation device 2 is inserted between the metal barrels 13 from the side without the crossbar 22, so as to dissipate heat from the individual battery cells.

[0036] The metal bucket 13 is connected to the heat sink 21 by a sliding structure, and the sliding direction of the sliding structure is perpendicular to the crossbar 22.

[0037] The sliding structure includes a groove 14 and a guide bar 211. The groove 14 is formed on the metal barrel 13, and the guide bar 211 is integrally formed on the heat sink 21. The groove 14 and the guide bar 211 are slidably engaged. Through the sliding engagement of the groove 14 and the guide bar 211, the heat sink 21 can slide along the length of the metal barrel 13 to realize the installation and removal of the heat dissipation device 2. The cooperation between the groove 14 and the guide bar 211 provides smooth operation, which helps to improve the stability and reliability of the entire system.

[0038] To ensure the stability and reliability of the connection, the above-mentioned slide groove 14 and guide bar 211 are respectively provided in upper and lower positions, and the upper and lower slide groove 14 and guide bar 211 are respectively in sliding engagement.

[0039] The metal barrel 13 is provided with two battery monomers. In this way, each battery monomer can be in contact with the cooling fin 21, and if only one battery monomer is provided, the utilization rate of the cooling fin 21 is low, and if more than two battery monomers are provided, the battery monomers in the middle cannot be in contact with the cooling fin 21, resulting in poor cooling effect. By optimizing the contact between the battery monomer and the cooling fin 21, the cooling efficiency and system stability are improved, and the cost is reduced and the safety is improved.

[0040] In order to ensure the stability of the structure of the heat dissipation device 2, the above-mentioned horizontal rod 22 is provided with two upper and lower horizontal rods.

[0041] In order to facilitate the assembly of the heat dissipation device 2, the above-mentioned horizontal rod 22 is slidably connected with the side surface of the cooling fin 21, the side surface of the cooling fin 21 is provided with a dovetail groove 23, and the above-mentioned horizontal rod 22 is a trapezoidal guide rail structure matched therewith.

[0042] In order to fix the relative position of the cooling fin 21, a bolt 3 is further included, a connecting hole is formed in the horizontal rod 22, and the bolt 3 passes through the locking hole and is connected with the bottom of the dovetail groove 23, so as to realize the locking of the position of the cooling fin 21.

[0043] In order to ensure the efficiency of heat transfer, the cooling fin 21 comprises a metal shell, and the inside of the metal shell is filled with a phase change material. The phase change material can absorb a large amount of heat and store it when the form changes due to the material characteristics of the phase change material.

[0044] In order to facilitate the installation and disassembly of the heat dissipation device 2, one side of the heat dissipation device 2 provided with the horizontal rod 22 is provided with a handle 24 for pulling out and inserting the heat dissipation device 2.

[0045] The battery pack 1 is provided with a heat dissipation device 2 during high-rate discharge. The device can absorb the heat generated during the discharge process of the battery pack 1 by using the form conversion of the phase change material, so as to reduce the temperature rise of the battery pack 1. Specifically, the heat generated during the discharge process of the battery pack 1 is absorbed by the phase change material, so that the temperature of the battery pack 1 after the unmanned aerial vehicle lands is basically balanced with the temperature before flight.

[0046] After the battery pack 1 is taken out of the plane, the heat dissipation device 2 can be removed, and the lithium battery pack 1 can be placed in an air-cooled box or a water-cooled box. Through the gap between the metal barrels 13, the battery pack 1 can realize heat balance during charging. Through the cooperation of the heat dissipation device 2 and the existing charging and cooling equipment, the temperature rise of the battery pack 1 during charging and discharging is reduced, heat balance is realized, and complete landing charging is realized.

[0047] The above is only the preferred embodiment of the present application, and does not limit the present application, and any simple modification, change and equivalent structure change according to the technical essence of the present application to the above embodiment still belong to the protection scope of the technical scheme of the present application.

Claims

1. A heat dissipation device for a lithium battery pack of a drone that can be charged upon landing, characterized in that: The heat dissipation device (2) is used for inserting the battery pack (1) during discharge to achieve heat dissipation; The battery pack (1) comprises a bottom shell (11) and a head cover (12); a plurality of metal barrels (13) in rectangular structure are installed between the bottom shell (11) and the head cover (12), a plurality of battery monomers are arranged in the metal barrels (13), expansion sponges are arranged between adjacent battery monomers, and a plurality of limiting grooves are uniformly arranged in the bottom shell (11) for installing the metal barrels (13); The heat dissipation device (2) comprises a plurality of uniformly arranged heat dissipation fins (21) and cross bars (22), the cross bars (22) are perpendicular to the heat dissipation surfaces (212) of the heat dissipation fins (21) and are sequentially connected with the side surfaces of the heat dissipation fins (21); The thickness of the heat dissipation fin (21) is consistent with the interval between adjacent metal barrels (13), and the heat dissipation device (2) is used for inserting between the metal barrels (13) from the side where the cross bar (22) is not arranged, so as to achieve heat dissipation of the battery monomers.

2. The heat dissipation device for the landing and charging unmanned aerial vehicle lithium battery pack according to claim 1, characterized in that: The metal barrel (13) and the heat dissipation fin (21) are connected through a sliding structure, and the sliding direction of the sliding structure is perpendicular to the cross bar (22).

3. A heat dissipation device for a landing and charging unmanned aerial vehicle lithium battery pack according to claim 2, characterized in that: The sliding structure comprises a sliding groove (14) and a guide strip (211), the sliding groove (14) is arranged on the metal barrel (13), the guide strip (211) is integrally formed on the heat dissipation fin (21), and the sliding groove (14) and the guide strip (211) are in sliding fit.

4. The heat dissipation device for the landing and charging unmanned aerial vehicle lithium battery pack according to claim 3, characterized in that: The sliding groove (14) and the guide strip (211) are arranged in two upper and lower positions respectively, and the upper and lower sliding grooves (14) and the guide strips (211) are in sliding fit respectively.

5. The heat dissipation device for the landing and charging unmanned aerial vehicle lithium battery pack according to claim 1, characterized in that: Two battery monomers are arranged in the metal barrel (13).

6. A heat sink for a drone lithium battery pack according to claim 1, wherein: The cross bar (22) is arranged in two upper and lower positions.

7. The heat dissipation device for the landing and charging unmanned aerial vehicle lithium battery pack according to claim 1, characterized in that: The cross bar (22) is in sliding connection with the side surface of the heat dissipation fin (21), the side surface of the heat dissipation fin (21) is provided with a dovetail groove (23), and the cross bar (22) is in the form of a trapezoidal guide rail structure matched with the dovetail groove (23).

8. A heat sink for a drone lithium battery pack according to claim 7, wherein: A bolt (3) is further arranged, a connecting hole is arranged on the cross bar (22), and the bolt (3) is connected with the bottom of the dovetail groove (23) through the locking hole, so as to lock the position of the heat dissipation fin (21).

9. A heat sink for a drone lithium battery pack according to claim 1, wherein: The heat dissipation fin (21) comprises a metal shell, and the metal shell is filled with a phase change material.

10. A heat sink for a drone lithium battery pack according to claim 1, wherein: The side, where the heat dissipation device (2) is provided with the cross bar (22), is provided with a handle (24) for extracting and inserting the heat dissipation device (2).

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