Lithium battery pack heat sealing device

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a lithium battery pack heat sealing device which comprises a machine frame, a heat shrinkage box is fixedly installed at the top of the machine frame, a plate chain type conveying belt is fixedly installed at the top of the machine frame and located on the inner side of the heat shrinkage box, and an air outlet cover is fixedly installed in the heat shrinkage box. A heat insulation cover is fixedly mounted in the thermal shrinkage box and located on the outer side of the air outlet cover, a circulating air duct is formed between the air outlet cover and the heat insulation cover, a heating assembly is fixedly mounted at the top of the thermal shrinkage box, and an air guide mechanism is fixedly mounted at the joint of the heating assembly and the circulating air duct; compared with an existing lithium battery pack heat sealing mode, the lithium battery pack heat sealing device has the advantages that the labor intensity is greatly reduced through the design, and meanwhile, the lithium battery pack heat sealing quality and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a heat sealing device for a lithium battery pack. Background Art

[0002] In the process of manufacturing lithium batteries, it is necessary to attach a heat shrinkable film to the outside of the lithium battery. In the existing attachment methods, the heat shrinkable film is first put on the outside of the lithium battery, and then a hot air blower is held by hand to heat the lithium battery, so that the heat shrinkable film softens and adheres to the outside of the lithium battery. This operation has the following problems: Since it is necessary to ensure that the heat shrinkable film can be tightly attached to the outside of the lithium battery, it is necessary to manually hold the hot air blower and repeatedly swing the lithium battery to evenly blow the four sides of the heat shrinkable film. However, after long-term work, the hands of manual operation are prone to fatigue, which easily leads to uneven heating of the heat shrinkable film, resulting in different shrinkage ratios and speeds at different places, so that the heat shrinkable film cannot be completely attached to the outside of the lithium battery, resulting in an uneven phenomenon. At the same time, when manually attaching, only one lithium battery can be slowly attached at a time. When a large number of lithium batteries need to be attached, not only is the labor intensity high, but also the production efficiency is limited.

[0003] Therefore, it is particularly important to design a heat sealing device for a lithium battery pack to solve the above defects. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model designs a heat sealing device for a lithium battery pack, which aims to solve the technical problems that when manually heat-sealing a lithium battery in the prior art, it is easy to cause uneven heating of the heat shrinkable film, and after heat shrinkage, it cannot be completely attached to the outside of the lithium battery, resulting in an uneven phenomenon, and at the same time, the labor intensity is high and the production efficiency is limited.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A heat sealing device for a lithium battery pack includes a frame. A heat shrinkage box is fixedly installed at the top of the frame. A plate chain conveyor belt is fixedly installed inside the heat shrinkage box at the top of the frame. An air outlet hood is fixedly installed inside the heat shrinkage box. A heat insulation hood is fixedly installed outside the air outlet hood inside the heat shrinkage box. A circulation air duct is formed between the air outlet hood and the heat insulation hood. A heating component is fixedly installed at the top of the heat shrinkage box. A wind guiding mechanism is fixedly installed at the connection between the heating component and the circulation air duct. A shaping component is fixedly installed at the rear end of the plate chain conveyor belt.

[0007] As a preferred solution of the utility model, a plurality of groups of air outlets are opened on the periphery of the inside of the air outlet hood, and the upper and lower ends of the air outlet hood are fixedly connected to the heat insulation hood through connecting plates.

[0008] As a preferred embodiment of the present utility model, the bottom of the heat shield is fixedly connected to the frame through multiple sets of support feet. Maintenance openings are provided on both the left and right sides of the heat shield, and maintenance doors are rotatably connected to positions corresponding to the maintenance openings on the outer side of the heat shrinkage box.

[0009] As a preferred embodiment of the present utility model, the heating assembly includes an exhaust fan fixedly installed at the front end of the top of the heat shrinkage box. A heating box is fixedly installed on the top of the heat shrinkage box and behind the exhaust fan. Heating tubes are fixedly installed inside the heating box, and the right side of the heating box is connected to the circulation air duct through a guide air duct.

[0010] As a preferred embodiment of the present utility model, the air guiding mechanism includes a first rotating shaft rotatably connected to one end inside the heat shield. An impeller is fixedly connected to the bottom end of the first rotating shaft, and a first bevel gear is fixedly connected to the top end of the first rotating shaft. A second rotating shaft is rotatably connected inside the heat shield and above the first rotating shaft. The right end of the second rotating shaft is engaged with the first bevel gear through a second bevel gear, and multiple sets of fan blades are fixedly connected to the left end of the second rotating shaft.

[0011] As a preferred embodiment of the present utility model, the shaping assembly includes first cylinders fixedly installed on the left and right sides at the rear end of the plate chain conveyor belt. A first shaping plate is fixedly installed on the driving end of the first cylinder. An installation frame is fixedly installed at the rear end of the plate chain conveyor belt, and a second cylinder is fixedly installed on the top of the installation frame. A second shaping plate is fixedly installed on the driving end of the second cylinder.

[0012] As a preferred embodiment of the present utility model, a guiding plate is fixedly connected to the front end of the first shaping plate. Heat dissipation fans are fixedly installed at both ends inside the first shaping plate and the second shaping plate, and multiple sets of heat dissipation grooves are provided on the inner sides of the first shaping plate and the second shaping plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, through the combined design of the heat shrinkage box, the plate chain conveyor belt, the air outlet hood, the heat shield, the circulation air duct, the heating assembly and the air guiding mechanism, when heat shrinkage packaging the lithium battery pack, only need to put the heat shrinkage film on the outside of the battery pack and then place it on the plate chain conveyor belt, and then transport it to the inside of the heat shrinkage box through the plate chain conveyor belt. Use the heating assembly to introduce the heated air into the circulation air duct, so that the hot air circulates inside the circulation air duct. Then, the hot air is introduced into the air outlet hood through multiple air outlets. The hot air discharged through multiple air outlets can evenly blow the battery pack from all around, making the heat shrinkage film evenly heated all around. Compared with manual operation, the quality and efficiency are greatly improved.

[0015] 2. In the present utility model, through the design of the shaping assembly, after the heat-shrinkable film closely adheres to the outer side of the lithium battery pack and is exported from the rear end of the plate chain conveyor belt, the heat-shrinkable film still has residual temperature and is relatively soft. The first shaping plate and the second shaping plate are pushed towards the outer side of the lithium battery pack, making the heat-shrinkable film fit more smoothly on the outer side of the lithium battery pack, further improving the production quality. Subsequently, the outer side of the lithium battery pack is quickly cooled, enabling the heat-shrinkable film to be quickly cooled and shaped for convenient blanking after shaping, further improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0018] Figure 3 is a schematic diagram of the internal structure of the heat-shrinkable box of the present utility model;

[0019] Figure 4 is Figure 3 an enlarged schematic diagram of part B in

[0020] In the figure: 1, frame; 2, heat-shrinkable box; 3, plate chain conveyor belt; 4, air outlet hood; 401, air outlet; 402, connecting plate; 5, heat insulation cover; 501, support feet; 502, inspection opening; 503, inspection door; 6, circulation air duct; 7, heating assembly; 701, exhaust fan; 702, heating box; 703, heating pipe; 704, air guide pipe; 8, air guiding mechanism; 801, first rotating shaft; 802, impeller; 803, first bevel gear; 804, second rotating shaft; 805, second bevel gear; 806, fan blade; 9, shaping assembly; 901, first cylinder; 902, first shaping plate; 903, mounting bracket; 904, second cylinder; 905, second shaping plate; 906, guiding plate; 907, cooling fan; 908, cooling slots. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment:

[0023] Please refer to Figures 1 - 4 , the present utility model provides a technical solution:

[0024] A heat-sealing device for a lithium battery pack, comprising a frame 1, a heat-shrinkage box 2 is fixedly installed on the top of the frame 1, a plate-chain conveyor belt 3 is fixedly installed on the top of the frame 1 and inside the heat-shrinkage box 2, an air outlet hood 4 is fixedly installed inside the heat-shrinkage box 2, a heat-insulation hood 5 is fixedly installed inside the heat-shrinkage box 2 and outside the air outlet hood 4, a circulation air duct 6 is formed between the air outlet hood 4 and the heat-insulation hood 5, a heating component 7 is fixedly installed on the top of the heat-shrinkage box 2, and a wind guiding mechanism 8 is fixedly installed at the connection between the heating component 7 and the circulation air duct 6. A shaping component 9 is fixedly installed at the rear end of the plate-chain conveyor belt 3.

[0025] First, a plurality of groups of air outlet holes 401 are formed in the periphery of the inner side of the air outlet hood 4. The upper and lower ends of the air outlet hood 4 are fixedly connected to the heat-insulation hood 5 through connecting plates 402. When heat-shrinking and sealing the lithium battery pack, only need to put the heat-shrinkable film outside the battery pack and place it on the plate-chain conveyor belt 3, and then convey it to the inside of the heat-shrinkage box 2 through the plate-chain conveyor belt 3. The heated air is introduced into the inside of the circulation air duct 6 by the heating component 7, and then introduced into the inside of the air outlet hood 4 through the plurality of groups of air outlet holes 401. The hot air discharged through the plurality of groups of air outlet holes 401 can evenly blow the periphery of the battery pack, so that the periphery of the heat-shrinkable film can be evenly heated, thus ensuring the heat-sealing effect of the lithium battery pack.

[0026] Furthermore, the bottom of the heat-insulation hood 5 is fixedly connected to the frame 1 through a plurality of support feet 501. Maintenance openings 502 are formed on the left and right sides of the heat-insulation hood 5. A maintenance door 503 is rotatably connected to the position on the outside of the heat-shrinkage box 2 corresponding to the maintenance opening 502. The heat-insulation hood 5 is supported inside the heat-shrinkage box 2 by the plurality of support feet 501, so that there is a space between the heat-insulation hood 5 and the heat-shrinkage box 2, playing a role of heat preservation and insulation. Open the maintenance door 503, and the inside of the circulation air duct 6 can be regularly inspected through the maintenance opening 502 to ensure the ventilation inside it.

[0027] Then, the heating component 7 includes an exhaust fan 701 fixedly installed at the front end of the top of the heat-shrinkage box 2. A heating box 702 is fixedly installed on the top of the heat-shrinkage box 2 and behind the exhaust fan 701. A heating pipe 703 is fixedly installed inside the heating box 702. The right side of the heating box 702 is connected to the circulation air duct 6 through an air duct 704. The external air is drawn into the inside of the heating box 702 by the exhaust fan 701, and then the air is heated by the heating pipe 703 and then introduced into the inside of the circulation air duct 6 through the air duct 704.

[0028] Further, the air guiding mechanism 8 includes a first rotating shaft 801 rotatably connected to one end inside the heat shield 5. A bottom end of the first rotating shaft 801 is fixedly connected with an impeller 802, and a top end of the first rotating shaft 801 is fixedly connected with a first bevel gear 803. Inside the heat shield 5 and above the first rotating shaft 801, a second rotating shaft 804 is rotatably connected. A right end of the second rotating shaft 804 is meshed with the first bevel gear 803 through a second bevel gear 805. A left end of the second rotating shaft 804 is fixedly connected with multiple groups of fan blades 806. When hot air enters the inside of the circulation air duct 6, it will blow the impeller 802 to drive the first rotating shaft 801 to rotate. Under the transmission of the first bevel gear 803 and the second bevel gear 805, the second rotating shaft 804 is driven to rotate, so that multiple groups of fan blades 806 fan the hot air in the circulation air duct 6, making the hot air circulate inside the circulation air duct 6. Subsequently, the hot air is introduced into the inside of the air outlet hood 4 through multiple groups of air outlets 401, thereby ensuring that the four sides of the heat shrinkable film can be evenly heated.

[0029] Secondly, the shaping assembly 9 includes first cylinders 901 fixedly installed on the left and right sides at the rear end of the plate chain conveyor belt 3. A first shaping plate 902 is fixedly installed on a driving end of the first cylinders 901. An installation frame 903 is fixedly installed at the rear end of the plate chain conveyor belt 3. A second cylinder 904 is fixedly installed on a top of the installation frame 903. A second shaping plate 905 is fixedly installed on a driving end of the second cylinder 904. After the heat shrinkable film closely adheres to the outside of the lithium battery pack and is led out from the rear end of the plate chain conveyor belt 3, at this time, the heat shrinkable film still has residual temperature and is relatively soft. At the same time, the first cylinders 901 and the second cylinder 904 are started, so that the first shaping plate 902 and the second shaping plate 905 are pushed towards the outside of the lithium battery pack, making the heat shrinkable film more flatly adhere to the outside of the lithium battery pack, further improving the production quality.

[0030] Finally, a guiding plate 906 is fixedly connected to a front end of the first shaping plate 902. Heat dissipation fans 907 are fixedly installed at both ends inside the first shaping plate 902 and the second shaping plate 905. Multiple groups of heat dissipation slots 908 are formed inside the first shaping plate 902 and the second shaping plate 905. After the heat-sealed lithium battery pack is led out from the rear end of the plate chain conveyor belt 3, under the guiding of the guiding plate 906, it enters between the two first shaping plates 902 to prevent it from skewing. After the heat shrinkable film is shaped by being pushed towards the outside of the lithium battery pack by the first shaping plate 902 and the second shaping plate 905, the first cylinders 901 and the second cylinder 904 are controlled to return. While the first shaping plate 902 and the second shaping plate 905 move away from the outside of the lithium battery pack, multiple groups of heat dissipation fans 907 are started. Under the action of the suction force of the air extraction, the outside of the lithium battery pack is quickly cooled through multiple groups of heat dissipation slots 908, so that the heat shrinkable film is quickly cooled and convenient for blanking after shaping, further improving the production efficiency.

[0031] In this embodiment, the implementation scenario is specifically as follows: when heat shrinking the lithium battery pack, it is only necessary to put the heat shrink film on the outside of the battery pack and place it on the plate chain conveyor belt 3, and then transport it to the inside of the heat shrink box 2 through the plate chain conveyor belt 3, and use the heating component 7 to introduce the heated air into the inside of the circulating air duct 6. When the hot air enters the inside of the circulating air duct 6, it will blow the impeller 802 to drive the first rotating shaft 801 to rotate, and drive the second rotating shaft 804 to rotate under the transmission of the first bevel gear 803 and the second bevel gear 805, so that the multiple sets of fan blades 806 fan the hot air in the circulating air duct 6, so that the hot air circulates on the inside of the circulating air duct 6, and then introduce the hot air into the inside of the air outlet hood 4 through the multiple sets of air outlets 401. The hot air exported through the multiple sets of air outlets 401 can evenly blow the battery pack around, so that the heat shrink film can be heated evenly around. After the heat shrink film is closely attached to the outside of the lithium battery pack, it is led out from the rear end of the plate chain conveyor belt 3. At this time, the heat shrink film still has residual temperature and is relatively soft. At the same time, the first cylinder 901 and the second cylinder 904 are started, so that the first shaping plate 902 and the second shaping plate 905 are pushed toward the outside of the lithium battery pack, so that the heat shrink film is more evenly attached to the outside of the lithium battery pack. The first cylinder 901 and the second cylinder 904 are controlled to return. While the first shaping plate 902 and the second shaping plate 905 are away from the outside of the lithium battery pack, multiple groups of cooling fans 907 are started. Under the action of exhaust suction, the outer side of the lithium battery pack is quickly cooled through multiple groups of heat dissipation grooves 908, so that the heat shrink film is quickly cooled after shaping, which is convenient for unloading. The entire operation process is simple and convenient. Compared with the existing heat sealing method of lithium battery packs, the utility model greatly reduces the labor intensity through design, and at the same time improves the quality and efficiency of heat sealing of lithium battery packs.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat sealing device for a lithium battery pack, comprising a frame (1), characterized in that: A heat shrink box (2) is fixedly mounted on the top of the frame (1); a plate chain conveyor belt (3) is fixedly mounted on the top of the frame (1) and located inside the heat shrink box (2); an air outlet hood (4) is fixedly mounted inside the heat shrink box (2); a heat insulation hood (5) is fixedly mounted inside the heat shrink box (2) and located outside the air outlet hood (4); a circulating air duct (6) is formed between the air outlet hood (4) and the heat insulation hood (5); a heating component (7) is fixedly mounted on the top of the heat shrink box (2); an air guide mechanism (8) is fixedly mounted at the connection between the heating component (7) and the circulating air duct (6); and a shaping component (9) is fixedly mounted at the rear end of the plate chain conveyor belt (3).

2. A heat sealing device for a lithium battery pack according to claim 1, characterized in that: A plurality of groups of air outlets (401) are provided around the inner side of the air outlet cover (4), and the upper and lower ends of the air outlet cover (4) are fixedly connected to the heat insulation cover (5) via connecting plates (402).

3. A heat sealing device for a lithium battery pack according to claim 1, characterized in that: The bottom of the heat insulation cover (5) is fixedly connected to the frame (1) via a plurality of sets of supporting legs (501); inspection openings (502) are provided on both left and right sides of the heat insulation cover (5); and an inspection door (503) is rotatably connected to the outside of the heat shrink box (2) at a position corresponding to the inspection opening (502).

4. A heat sealing device for a lithium battery pack according to claim 1, characterized in that: The heating assembly (7) comprises an exhaust fan (701) fixedly mounted on the front end of the top of the heat shrink box (2); a heating box (702) is fixedly mounted on the top of the heat shrink box (2) and on the back side of the exhaust fan (701); a heating tube (703) is fixedly mounted inside the heating box (702); and the right side of the heating box (702) is connected to the circulating air duct (6) via an air guide tube (704).

5. A heat sealing device for a lithium battery pack according to claim 1, characterized in that: The air guide mechanism (8) comprises a first rotating shaft (801) rotatably connected to one end inside the heat insulation cover (5); the bottom end of the first rotating shaft (801) is fixedly connected to an impeller (802); the top end of the first rotating shaft (801) is fixedly connected to a first bevel gear (803); a second rotating shaft (804) is rotatably connected inside the heat insulation cover (5) and located above the first rotating shaft (801); the right end of the second rotating shaft (804) is meshed with the first bevel gear (803) via a second bevel gear (805); and the left end of the second rotating shaft (804) is fixedly connected to a plurality of sets of fan blades (806).

6. A heat sealing device for a lithium battery pack according to claim 1, characterized in that: The shaping component (9) comprises a first cylinder (901) fixedly mounted on the left and right sides of the rear end of the plate chain conveyor belt (3); a first shaping plate (902) is fixedly mounted on the driving end of the first cylinder (901); a mounting frame (903) is fixedly mounted on the rear end of the plate chain conveyor belt (3); a second cylinder (904) is fixedly mounted on the top of the mounting frame (903); and a second shaping plate (905) is fixedly mounted on the driving end of the second cylinder (904).

7. A heat sealing device for a lithium battery pack according to claim 6, characterized in that: The front end of the first shaping plate (902) is fixedly connected to a guide plate (906), and cooling fans (907) are fixedly installed at both ends of the first shaping plate (902) and the second shaping plate (905), and multiple groups of cooling grooves (908) are provided on the inner sides of the first shaping plate (902) and the second shaping plate (905).

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