Full-automatic coating machine for square power battery

Abstract

The invention relates to the technical field of battery coating machines, in particular to a square power battery full-automatic coating machine which comprises a pushing mechanism, an unwinding mechanism and a conveying belt mechanism. The device further comprises a film wrapping frame, two large-face roller sets, two side edge folding assemblies and two vertical rollers, the film wrapping frame is installed between the unwinding mechanism and the conveying belt mechanism, the two large-face roller sets are used for rolling PET films on the upper end face and the lower end face of the square power battery, and the two side edge folding assemblies are installed on the left side and the right side of the film wrapping frame correspondingly. The two side edge folding assemblies are located on the left side and the right side of the two large-face roller sets correspondingly, the two side edge folding assemblies move up and down to be used for folding and rolling PET films on the left side wall and the right side wall of the square power battery, the two vertical rollers are installed on the left side and the right side of the film wrapping frame in a relatively vertical rotating mode correspondingly, and the two vertical rollers are located behind the two side edge folding assemblies correspondingly; according to the full-automatic film wrapping machine, a high-integration film wrapping station is adopted, full-automatic comprehensive film wrapping and edge folding are achieved, the structure is simple, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery wrapping machines, and particularly to a fully automatic wrapping machine for square power batteries. Background Art

[0002] For square power batteries, a PET film needs to be pasted on the surface of the battery case to protect the battery case and prevent electric leakage and short circuit between batteries. In the prior art, a variety of wrapping machines for square power batteries have been proposed. For example, a wrapping device for a square aluminum shell battery proposed in a Chinese utility model patent with the publication number CN209709101U is used to wrap the bottom surface and two large side surfaces of the battery; and then combined with a device for cutting and folding the sides of a wrapping machine for square power batteries proposed in a Chinese utility model patent with the publication number CN216435964U, a complete fully automatic wrapping machine capable of wrapping and folding the sides of square power batteries is formed; realizing automatic wrapping of the battery and cutting and folding the cut of the blue film to fit, avoiding overlapping and non-adhesive areas of the blue film.

[0003] However, the above combined fully automatic wrapping machine sets wrapping and folding separately, with a low integration level. Square power batteries need to go through multiple workstations to complete wrapping, and the square power batteries need to be transferred multiple times between multiple conveying lines, resulting in the need to set multiple transfer manipulators for the equipment, with a complex structure and being not conducive to further improving work efficiency. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a fully automatic wrapping machine for square power batteries that adopts a highly integrated wrapping workstation, realizes full-automatic comprehensive wrapping and folding, has a simple structure, and improves work efficiency.

[0005] A fully automatic film wrapping machine for square power batteries of the present invention includes a material pushing mechanism, a film unwinding mechanism and a conveyor belt mechanism. The film unwinding mechanism is used for loading and conveying PET films. The material pushing mechanism is used for pushing the square power batteries to move. The conveyor belt mechanism is used for conveying the square power batteries wrapped with films backward. It also includes a film wrapping frame, two large surface roller groups, two side edge folding assemblies and two vertical rollers. The film wrapping frame is installed between the film unwinding mechanism and the conveyor belt mechanism. The two large surface roller groups are respectively installed oppositely on the upper and lower parts of the film wrapping frame. The two large surface roller groups are used for rolling the PET films on the upper and lower end faces of the square power batteries. The two side edge folding assemblies are respectively installed on the left and right sides of the film wrapping frame. The two side edge folding assemblies are respectively located on the left and right sides of the two large surface roller groups. The two side edge folding assemblies move up and down to fold and roll the PET films on the left and right side walls of the square power batteries. The two vertical rollers are respectively installed rotatably and vertically oppositely on the left and right sides of the film wrapping frame. The two vertical rollers are respectively located behind the two side edge folding assemblies. During operation, the film unwinding mechanism unfolds the PET film downward by a certain length and then cuts it, so that the cut PET film is located in front of the two large surface roller groups. The material pushing mechanism acts to push the square power battery between the two large surface roller groups, so that the bottom surface of the square power battery presses against the middle of the PET film and then is sent between the two large surface roller groups, so that the upper and lower parts of the PET film are respectively rolled and adhered tightly to the upper and lower end faces of the square power battery by the two large surface roller groups. The material pushing mechanism continues to push the square power battery to the two side edge folding assemblies. The two side edge folding assemblies act to fold the left and right edges of the PET film respectively and then roll and adhere them tightly to the left and right side walls of the square power battery. The material pushing mechanism continues to push the square power battery backward through the two vertical rollers. The two vertical rollers fold the PET films on both sides of the bottom of the square power battery and then roll and adhere them tightly to the left and right side walls of the square power battery, realizing the full-automatic film wrapping of the square power battery. The material pushing mechanism continues to act to push the square power battery wrapped with films out of the two large surface roller groups and the two vertical rollers, and place the square power battery on the conveyor belt mechanism. The material pushing mechanism contracts and resets. The conveyor belt mechanism conveys the square power battery to subsequent operations. Compared with the prior art, the full-automatic bottom surface and two large side surfaces of the square power battery are film wrapped at one station, and the PET films on the side and the bottom are automatically folded to the side walls of the square power battery. The integration degree is high and the structure is simpler. It is not necessary to set multiple transfer manipulators between multiple conveyor lines to transfer the square power battery multiple times, which is beneficial to improving work efficiency.

[0006] Preferably, the large surface roller group includes a plurality of first telescopic rods, a plurality of first springs, a front roller and a plurality of rear rollers. The plurality of first telescopic rods are installed on the left and right parts of the film wrapping frame. The plurality of first telescopic rods are all installed with first springs. The two ends of the front roller and the plurality of rear rollers are respectively rotatably connected to the plurality of first telescopic rods. The front roller is located in front of the plurality of rear rollers. The length of the front roller is greater than the length of the square power battery. The lengths of the plurality of rear rollers are less than the length of the square power battery. The two vertically arranged front rollers fully roll the PET film on the upper and lower end faces of the entering square power battery, so that the PET film is pasted tightly. The plurality of rear rollers roll and clamp the square power battery. The elastic force of the plurality of first springs makes the square power battery be rolled with greater force and clamped more stably by the two front rollers and the plurality of rear rollers.

[0007] Preferably, the side folding edge assembly includes a slide rod, a slide table, a cross frame, a double roller frame and two cross rollers. The slide rod is vertically installed on the left and right sides of the film wrapping frame. The slide rod is located outside the plurality of rear rollers. The slide table is slidably installed on the slide rod in a liftable manner. The cross frame is installed on the slide table. The double roller frame is installed on the cross frame. The upper and lower ends of the double roller frame are respectively rotatably installed with cross rollers. The two cross rollers are horizontally arranged. The distance between the two cross rollers is greater than the thickness of the square power battery. The slide table rises along the slide rod. The slide table drives the two cross rollers to rise through the cross frame and the double roller frame, so that the lower cross roller folds and rolls the PET film extending out of the side edge of the lower end face of the square power battery upwards and tightly. The slide table descends along the slide rod. The slide table drives the two cross rollers to descend through the cross frame and the double roller frame, so that the upper cross roller folds and rolls the PET film extending out of the side edge of the upper end face of the square power battery downwards and tightly, realizing the full-automatic folding of the side PET film of the square power battery and improving the work efficiency.

[0008] Preferably, it further includes two rotating shafts and two first torsion springs. The middle parts of the two double roller frames are respectively hinged to the two cross frames through the two rotating shafts. One ends of the two first torsion springs are respectively connected to the two cross frames. The other ends of the two first torsion springs are respectively connected to the two rotating shafts. The two first torsion springs elastically support the two double roller frames respectively. The elastic force of the two first torsion springs makes the double roller frames and the cross frames keep an elastically rotatable connection, so that the two cross rollers fold the side edges of the square power battery more densely and reliably.

[0009] Preferably, it further includes four first sliders and four second springs. The upper and lower ends of the two vertical rollers are respectively installed with first sliders. The four first sliders are respectively slidably installed on the left and right sides at the rear end of the film wrapping frame. The outer ends of the four second springs are connected to the film wrapping frame. The inner ends of the four second springs are respectively connected to the four first sliders. The elastic force of the four second springs pushes the four first sliders towards the inner side of the film wrapping frame. The elastic force of the four second springs pushes the four first sliders towards the inner side of the film wrapping frame, so that the two vertical rollers keep a certain pressure on the side walls of the square power battery, making the folding edges of the PET film on both sides of the bottom of the square power battery more densely and reliably.

[0010] Preferably, it further includes two first diagonal rods, two third springs, a first bottom roller, two second diagonal rods, two fourth springs, and a second bottom roller. The two first diagonal rods are respectively installed on the left and right sides of the lower part of the front end of the film wrapping frame. The two first diagonal rods are inclined. The middle parts of the two first diagonal rods are both installed with third springs. The two ends of the first bottom roller are respectively rotatably connected to the upper ends of the two first diagonal rods. The two second diagonal rods are respectively installed on the left and right sides of the upper part of the front end of the film wrapping frame. The two second diagonal rods are inclined. The middle parts of the two second diagonal rods are both installed with fourth springs. The two ends of the second bottom roller are respectively rotatably connected to the lower ends of the two second diagonal rods. The first bottom roller and the second bottom roller are horizontally arranged between the two large surface roller groups; the first bottom roller and the second bottom roller are located between the film wrapping frame and the unwinding mechanism. When the pusher mechanism pushes the square power battery to push the PET film, the first bottom roller first comes into rolling contact with the bottom of the square power battery. The square power battery continues to move backward, causing the two third springs to be compressed along the two first diagonal rods, causing the first bottom roller to move downward, thereby rolling and compacting the lower half of the PET film on the bottom surface of the square power battery. When the square power battery passes over the first bottom roller, the elastic force of the two third springs causes the first bottom roller to rise, causing the first bottom roller to roll the lower short side to the lower edge of the electrode end face of the square power battery; similarly, the second bottom roller then comes into rolling contact with the bottom of the square power battery. The square power battery continues to move backward, causing the two fourth springs to be compressed along the two second diagonal rods, causing the second bottom roller to move upward, thereby rolling and compacting the upper half of the PET film on the bottom surface of the square power battery. When the square power battery passes over the second bottom roller, the elastic force of the two fourth springs causes the second bottom roller to descend, causing the second bottom roller to roll the upper short side to the upper edge of the electrode end face of the square power battery.

[0011] Preferably, it further includes a unwind reel assembly, a lower cross beam, an upper cross beam, two vertical shafts, four cutting knives, two transmission wheels and a transmission belt. An unwind reel assembly for loading a PET film reel is provided at the upper part of the unwind mechanism. Both the lower cross beam and the upper cross beam are installed below the unwind reel assembly. Clamping components for clamping the PET film are provided in the middle of both the lower cross beam and the upper cross beam. The upper ends of the two vertical shafts are rotatably connected to the upper cross beam, and the lower ends of the two vertical shafts are rotatably connected to the lower cross beam. The two vertical shafts are respectively located on both sides of the clamping components of the lower cross beam and the upper cross beam. Two cutting knives are installed on each of the two vertical shafts. The two cutting knives are respectively flush with the upper end face and the lower end face of the square power battery. The two transmission wheels are respectively concentrically installed at the upper ends of the two vertical shafts. The transmission belt is sleeved on the two transmission wheels. The PET film reel is loaded onto the unwind reel assembly, and the lower end of the PET film is sequentially passed through the clamping components of the lower cross beam and the upper cross beam. The clamping component can be a clamping plate assembly driven by a cylinder, a roller shaft assembly, etc., which will not be elaborated here. After the PET film extends in place and is clamped, one vertical shaft rotates driven by a motor, driving the two cutting knives thereon to cut the PET film. The cut is located at the bottom corner of the square power battery. At the same time, under the transmission action of the two transmission wheels and the transmission belt, the other vertical shaft rotates synchronously, so that the two cutting knives on the other vertical shaft cut the other side of the PET film, realizing the automatic cutting of both sides of the PET film.

[0012] Preferably, it further includes a tool holder and a cutting knife. The tool holder is installed on the transmission belt, and the cutting knife is installed on the tool holder. After the four cutting knives finish cutting the PET film, the transmission wheel drives the transmission belt to continue rotating, driving the tool holder and the cutting knife to move linearly, so that the cutting knife cuts off the upper end of the PET film, realizing the automatic cutting of the PET film.

[0013] Preferably, it further includes a plurality of clamping seats, a gantry, a vision inspection mechanism, a first push rod, a second push rod, and a hot pressing station. The plurality of clamping seats are evenly installed on the conveyor belt mechanism. The plurality of clamping seats are used to clamp the square power batteries after being coated. The front end of the conveyor belt mechanism is aligned with the middle parts of the two large surface roller groups, so that the clamping seats at the front end of the conveyor belt mechanism in a horizontal state are aligned with the middle parts of the two large surface roller groups. The gantry is installed at the upper front end of the frame of the conveyor belt mechanism, and the vision inspection mechanism is installed on the gantry. The first push rod and the second push rod are installed on the rear frame of the conveyor belt mechanism. The first push rod is used to push out the unqualified square power batteries from the clamping seats. The hot pressing station is installed on the frame of the conveyor belt mechanism. The hot pressing station is located on the other side of the second push rod. The length of the hot pressing station is greater than the length of the square power battery. A hot pressing plate assembly is arranged inside the hot pressing station; since the upper opening of the clamping seat at the front end of the conveyor belt mechanism is aligned with the middle parts of the two large surface roller groups, the square power batteries after being coated can be directly loaded into the clamping seats after being pushed out of the two large surface roller groups and the two vertical rollers by the pushing mechanism, thus eliminating the traditional transfer robot structure, simplifying the equipment, and saving costs. The conveyor belt mechanism drives a plurality of square power batteries to move through a plurality of clamping seats. When the square power batteries pass through the gantry and the vision inspection mechanism, the vision inspection mechanism detects the coating quality of the square power batteries. The first push rod pushes out the square power batteries with unqualified coatings from the clamping seats. The second push rod pushes the square power batteries with qualified coatings into the hot pressing station. After the hot pressing station positions the square power batteries, the hot pressing plate assembly acts to hot press and tightly attach the short sides of the electrode end faces of the square power batteries, making the top short sides of the coating more firm, and realizing the operations of detecting the square power batteries and removing unqualified products.

[0014] Preferably, it further includes two driving motors and two cams. The two driving motors are respectively installed on the left and right parts of the gantry, and the two cams are respectively installed on the output shafts of the two driving motors; the two driving motors respectively drive the two cams to rotate inwards synchronously, so that the protruding parts of the two cams clamp the left and right side walls of the square power battery in the clamping seat. The two cams continue to rotate, so that the two cams lift the square power battery out of the clamping seat, so that the clamping seat does not block the detection path of the vision inspection mechanism for the square power battery.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The bottom surface and two large side surfaces of the square power battery are fully automatically coated at one station, and the PET films on the side and bottom are automatically folded towards the side walls of the square power battery. The integration degree is high, the structure is simpler, and there is no need to set up a plurality of transfer manipulators between multiple conveyor lines to transfer the square power batteries multiple times, which is beneficial to improving work efficiency. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is an isometric schematic diagram of the present invention; Figure 3 is a front view structural schematic diagram of the present invention; Figure 4 is a structural schematic diagram of structures such as an unwinding mechanism, an unwinding shaft assembly, a lower cross beam, an upper cross beam, a vertical shaft, a cutting knife, a tool rest, and a cutting blade, etc.; Figure 5 is a structural schematic diagram of structures such as a film wrapping frame, a large surface roller group, a side hemming assembly, and a vertical roller, etc.; Figure 6 is a side view structural schematic diagram of structures such as a film wrapping frame, a large surface roller group, a side hemming assembly, and a vertical roller, etc.; Figure 7 is a structural schematic diagram of the disassembled state of structures such as a film wrapping frame, a large surface roller group, a side hemming assembly, and a vertical roller, etc.; Figure 8 is a structural schematic diagram of structures such as a film wrapping frame, a large surface roller group, and a vertical roller, etc.; Figure 9 is a structural schematic diagram of a side hemming assembly; Figure 10 is a structural schematic diagram of structures such as a conveyor belt mechanism, a clamping seat, a vision inspection mechanism, a push rod one, a push rod two, a hot pressing station, a driving motor, and a cam, etc.; Figure 11 is a schematic diagram of the process of wrapping and hemming a square power battery.

[0017] Reference numerals in the drawings: 1. Pushing material mechanism; 2. Unwinding mechanism; 3. Conveyor belt mechanism; 4. Film wrapping frame; 5. Large surface roller group; 6. Side hemming assembly; 7. Vertical roller; 8. Telescopic rod one; 9. Spring one; 10. Front roller; 11. Rear roller; 12. Slide bar; 13. Slide table; 14. Cross frame; 15. Double roller frame; 16. Cross roller; 17. Rotating shaft; 18. Torsion spring one; 19. Slide block one; 20. Spring two; 21. Inclined rod one; 22. Spring three; 23. Bottom surface roller one; 24. Inclined rod two; 25. Spring four; 26. Bottom surface roller two; 27. Unwinding shaft assembly; 28. Lower cross beam; 29. Upper cross beam; 30. Vertical shaft; 31. Cutting knife; 32. Transmission wheel; 33. Transmission belt; 34. Tool rest; 35. Cutting blade; 36. Clamping seat; 37. Gantry; 38. Vision inspection mechanism; 39. Push rod one; 40. Push rod two; 41. Hot pressing station; 42. Driving motor; 43. Cam. Detailed implementation manners

[0018] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0019] Example 1, as shown in Figures 1 to 3 , Figures 5 to 9 , Figure 11 A fully automatic film wrapping machine for square power batteries includes a material pushing mechanism 1, a film unwinding mechanism 2, and a conveyor belt mechanism 3. The film unwinding mechanism 2 is used to load and convey PET films. The material pushing mechanism 1 is used to push the square power battery towards the film unwinding mechanism 2. The conveyor belt mechanism 3 is used to convey the film-wrapped square power battery backward. It also includes a film wrapping frame 4, two large surface roller groups 5, two side edge folding assemblies 6, and two vertical rollers 7. The film wrapping frame 4 is installed between the film unwinding mechanism 2 and the conveyor belt mechanism 3. The two large surface roller groups 5 are respectively installed oppositely on the upper and lower parts of the film wrapping frame 4. The two large surface roller groups 5 are used to roll the PET films on the upper and lower end faces of the square power battery. The two side edge folding assemblies 6 are respectively installed on the left and right sides of the film wrapping frame 4. The two side edge folding assemblies 6 are respectively located on the left and right sides of the two large surface roller groups 5. The two side edge folding assemblies 6 move up and down to fold and roll the PET films on the left and right side walls of the square power battery. The two vertical rollers 7 are respectively installed rotatably vertically oppositely on the left and right sides of the film wrapping frame 4. The two vertical rollers 7 are respectively located behind the two side edge folding assemblies 6.

[0020] During operation, the film unwinding mechanism 2 unfolds the PET film downward by a certain length and then cuts it, so that the cut PET film is located in front of the two large surface roller groups 5. The material pushing mechanism 1 operates to push the square power battery between the two large surface roller groups 5, so that the bottom surface of the square power battery presses against the middle of the PET film and then is sent between the two large surface roller groups 5, so that the upper and lower parts of the PET film are respectively rolled and adhered to the upper and lower end faces of the square power battery by the two large surface roller groups 5. The material pushing mechanism 1 continues to push the square power battery to the two side edge folding assemblies 6. The two side edge folding assemblies 6 operate to fold the left and right edges of the PET film respectively and then roll and adhere them to the left and right side walls of the square power battery. The material pushing mechanism 1 continues to push the square power battery backward through the two vertical rollers 7. The two vertical rollers 7 fold the PET films on both sides of the bottom of the square power battery and then roll and adhere them to the left and right side walls of the square power battery, realizing the full-automatic film wrapping of the square power battery. The material pushing mechanism 1 continues to operate to push the film-wrapped square power battery out of the two large surface roller groups 5 and the two vertical rollers 7, and place the square power battery on the conveyor belt mechanism 3. The material pushing mechanism 1 contracts and resets. The conveyor belt mechanism 3 conveys the square power battery to subsequent operations. Compared with the prior art, the bottom surface and two large side surfaces of the square power battery are fully automatically film-wrapped at one station, and the PET films on the side and bottom are automatically folded to the side walls of the square power battery. The integration degree is high, the structure is simpler, and there is no need to set multiple transfer manipulators between multiple conveyor lines to transfer the square power battery multiple times, which is beneficial to improving work efficiency.

[0021] Specifically, the large surface roller group 5 includes a plurality of first telescopic rods 8, a plurality of first springs 9, a front roller 10 and a plurality of rear rollers 11. The plurality of first telescopic rods 8 are installed on the left and right parts of the film wrapping frame 4. The plurality of first telescopic rods 8 are all installed with first springs 9. The two ends of the front roller 10 and the plurality of rear rollers 11 are respectively rotatably connected to the plurality of first telescopic rods 8. The front roller 10 is located in front of the plurality of rear rollers 11. The length of the front roller 10 is greater than the length of the square power battery. The length of the plurality of rear rollers 11 is less than the length of the square power battery. The side folding edge assembly 6 includes a slide rod 12, a slide table 13, a cross frame 14, a double roller frame 15 and two cross rollers 16. The slide rod 12 is vertically installed on the left and right sides of the film wrapping frame 4. The slide rod 12 is located outside the plurality of rear rollers 11. The slide table 13 is slidably installed on the slide rod 12 in a liftable manner. The cross frame 14 is installed on the slide table 13. The double roller frame 15 is installed on the cross frame 14. The upper end and the lower end of the double roller frame 15 are both rotatably installed with cross rollers 16. The two cross rollers 16 are horizontally arranged. The distance between the two cross rollers 16 is greater than the thickness of the square power battery. It further includes two rotating shafts 17 and two first torsion springs 18. The middle parts of the two double roller frames 15 are respectively hinged to the two cross frames 14 through the two rotating shafts 17. One ends of the two first torsion springs 18 are respectively connected to the two cross frames 14. The other ends of the two first torsion springs 18 are respectively connected to the two rotating shafts 17. The two first torsion springs 18 respectively elastically support the two double roller frames 15. It further includes four first sliders 19 and four second springs 20. The upper ends and the lower ends of the two vertical rollers 7 are respectively installed with first sliders 19. The four first sliders 19 are respectively slidably installed on the left and right sides of the rear end of the film wrapping frame 4. The outer ends of the four second springs 20 are connected to the film wrapping frame 4. The inner ends of the four second springs 20 are respectively connected to the four first sliders 19. The elastic forces of the four second springs 20 push the four first sliders 19 towards the inner side of the film wrapping frame 4.

[0022] Two front roller wheels 10 arranged vertically roll the PET films on the upper and lower end faces of the incoming square power batteries comprehensively, making the PET films stick tightly. Multiple rear roller wheels 11 roll and clamp the square power batteries. The elastic force of multiple first springs 9 makes the square power batteries be rolled with greater force and clamped more stably by the two front roller wheels 10 and the multiple rear roller wheels 11. When the square power battery reaches between the two side folding assemblies 6, the sliding table 13 rises along the sliding rod 12. The sliding table 13 drives the two cross rollers 16 to rise through the cross frame 14 and the double roller frame 15, so that the lower cross roller 16 folds the PET film extending from the side of the lower end face of the square power battery upward and rolls it tightly; the sliding table 13 descends along the sliding rod 12. The sliding table 13 drives the two cross rollers 16 to descend through the cross frame 14 and the double roller frame 15, so that the upper cross roller 16 folds the PET film extending from the side of the upper end face of the square power battery downward and rolls it tightly, realizing the full-automatic folding of the side PET films of the square power battery. The elastic force of the two first torsion springs 18 makes the double roller frame 15 be elastically rotatably connected with the cross frame 14, making the side folding of the two cross rollers 16 on the square power battery denser and more reliable. The elastic force of the four second springs 20 pushes the four first sliders 19 towards the inner side of the film wrapping frame 4, and further makes the two vertical rollers 7 maintain a certain pressure on the side walls of the square power battery, making the folding of the PET films on both sides of the bottom of the square power battery denser and more reliable.

[0023] Embodiment 2, as Figures 1 to 4 and Figure 7As shown in the figure, on the basis of Embodiment 1, it further includes two first inclined rods 21, two third springs 22, a first bottom roller 23, two second inclined rods 24, two fourth springs 25 and a second bottom roller 26. The two first inclined rods 21 are respectively installed on the left and right sides of the lower part of the front end of the film wrapping frame 4. The two first inclined rods 21 are inclined. The middle parts of the two first inclined rods 21 are both installed with third springs 22. The two ends of the first bottom roller 23 are respectively rotatably connected to the upper ends of the two first inclined rods 21. The two second inclined rods 24 are respectively installed on the left and right sides of the upper part of the front end of the film wrapping frame 4. The two second inclined rods 24 are inclined. The middle parts of the two second inclined rods 24 are both installed with fourth springs 25. The two ends of the second bottom roller 26 are respectively rotatably connected to the lower ends of the two second inclined rods 24. The first bottom roller 23 and the second bottom roller 26 are horizontally arranged between the two large surface roller groups 5; it further includes a film unwinding shaft assembly 27, a lower cross beam 28, an upper cross beam 29, two vertical shafts 30, four cutting knives 31, two transmission wheels 32 and a transmission belt 33. The upper part of the film unwinding mechanism 2 is provided with a film unwinding shaft assembly 27 for loading the PET film reel. The lower cross beam 28 and the upper cross beam 29 are both installed below the film unwinding shaft assembly 27. Clamping components for clamping the PET film are arranged in the middle parts of the lower cross beam 28 and the upper cross beam 29. The upper ends of the two vertical shafts 30 are rotatably connected to the upper cross beam 29, and the lower ends of the two vertical shafts 30 are rotatably connected to the lower cross beam 28. The two vertical shafts 30 are respectively located on both sides of the clamping components of the lower cross beam 28 and the upper cross beam 29. Two cutting knives 31 are installed on each of the two vertical shafts 30. The two cutting knives 31 are respectively flush with the upper end surface and the lower end surface of the square power battery. The two transmission wheels 32 are respectively concentrically installed at the upper ends of the two vertical shafts 30. The transmission belt 33 is sleeved on the two transmission wheels 32; it further includes a tool holder 34 and a cutting knife 35. The tool holder 34 is installed on the transmission belt 33, and the cutting knife 35 is installed on the tool holder 34.

[0024] The PET film reel is loaded onto the unwind reel assembly 27, and the lower end of the PET film passes through the clamping components of the lower crossbeam 28 and the upper crossbeam 29 in sequence. The clamping components can be clamping plate assemblies driven by cylinders, roller shaft assemblies, etc., which will not be elaborated here. After the PET film extends in place and is clamped, a vertical shaft 30 rotates driven by a motor, driving the two cutting knives 31 thereon to cut the PET film. The cuts are located at the bottom corners of the square power battery. At the same time, under the driving action of the two transmission wheels 32 and the transmission belt 33, the other vertical shaft 30 rotates synchronously, so that the other vertical shaft 30 drives the two cutting knives 31 thereon to cut the other side of the PET film, realizing automatic cutting of both sides of the PET film. After the four cutting knives 31 finish cutting the PET film, the transmission wheel 32 drives the transmission belt 33 to continue rotating, driving the tool holder 34 and the cutting knife 35 to move linearly, so that the cutting knife 35 cuts off the upper end of the PET film, realizing automatic cutting of the PET film. The bottom roller one 23 and the bottom roller two 26 are located between the film wrapping frame 4 and the unwind mechanism 2. When the pusher mechanism 1 pushes the square power battery to push the PET film, the bottom roller one 23 first makes rolling contact with the bottom of the square power battery. The square power battery continues to move backward, causing the two springs three 22 to be compressed along the two inclined rods one 21, causing the bottom roller one 23 to move downward, thereby rolling and compacting the lower half of the PET film on the bottom surface of the square power battery. When the square power battery passes over the bottom roller one 23, the elastic force of the two springs three 22 causes the bottom roller one 23 to rise, so that the bottom roller one 23 rolls the lower side short edge to the lower edge of the electrode end surface of the square power battery; similarly, the bottom roller two 26 then makes rolling contact with the bottom of the square power battery. The square power battery continues to move backward, causing the two springs four 25 to be compressed along the two inclined rods two 24, causing the bottom roller two 26 to move upward, thereby rolling and compacting the upper half of the PET film on the bottom surface of the square power battery. When the square power battery passes over the bottom roller two 26, the elastic force of the two springs four 25 causes the bottom roller two 26 to descend, so that the bottom roller two 26 rolls the upper side short edge to the upper edge of the electrode end surface of the square power battery; when the square power battery passes over the two vertical rollers 7, the elastic force of the four springs two 20 causes the two vertical rollers 7 to move inward, so that the two vertical rollers 7 roll the left and right side short edges to the left and right edges of the electrode end surface of the square power battery.

[0025] Example 3, as Figures 1 to 3 and Figure 10As shown in the figure, on the basis of Embodiment 1, it further includes a plurality of clamping seats 36, a gantry 37, a vision inspection mechanism 38, a first push rod 39, a second push rod 40, and a hot pressing station 41. The plurality of clamping seats 36 are evenly installed on the conveyor belt mechanism 3. The plurality of clamping seats 36 are used to clamp the square power batteries after being loaded with packaging films. The front end of the conveyor belt mechanism 3 is aligned with the middle parts of the two large surface roller groups 5, so that the clamping seats 36 in the horizontal state at the front end of the conveyor belt mechanism 3 are aligned with the middle parts of the two large surface roller groups 5. The gantry 37 is installed at the upper front end of the frame of the conveyor belt mechanism 3. The vision inspection mechanism 38 is installed on the gantry 37. The first push rod 39 and the second push rod 40 are installed on the rear frame of the conveyor belt mechanism 3. The first push rod 39 is used to push the unqualified square power batteries out of the clamping seats 36. The hot pressing station 41 is installed on the frame of the conveyor belt mechanism 3. The hot pressing station 41 is located on the other side of the second push rod 40. The length of the hot pressing station 41 is greater than the length of the square power battery. It further includes two driving motors 42 and two cams 43. The two driving motors 42 are respectively installed on the left and right parts of the gantry 37. The two cams 43 are respectively installed on the output shafts of the two driving motors 42.

[0026] Since the upper openings of the clamping seats 36 at the front end of the conveyor belt mechanism 3 are aligned with the middle parts of the two large surface roller groups 5, the square power batteries after the packaging is completed can be directly loaded into the clamping seats 36 after being pushed out of the two large surface roller groups 5 and the two vertical roller groups 7 by the pushing mechanism 1. Thus, the traditional transfer robot arm structure is cancelled, the equipment is simplified, and the cost is saved. The conveyor belt mechanism 3 drives a plurality of square power batteries to move through the plurality of clamping seats 36. When the square power batteries pass by the gantry 37 and the vision inspection mechanism 38, the two driving motors 42 respectively drive the two cams 43 to rotate synchronously inward, so that the protruding parts of the two cams 43 clamp the left and right side walls of the square power batteries in the clamping seats 36. The two cams 43 continue to rotate, so that the two cams 43 lift the square power batteries out of the clamping seats 36, so that the clamping seats 36 do not block the detection path of the vision inspection mechanism 38 for the square power batteries. The vision inspection mechanism 38 inspects the packaging quality of the square power batteries. For details, refer to CN202122177375.3 A Vision Defect Rapid Detection Mechanism for the Shell of Square Power Batteries. The first push rod 39 pushes the square power batteries with unqualified packaging out of the clamping seats 36, and the second push rod 40 pushes the square power batteries with qualified packaging into the hot pressing station 41. The hot pressing station 41 and the hot pressing plate assembly are both prior arts and will not be elaborated here. After the hot pressing station 41 positions the square power battery, the hot pressing plate assembly acts to hot press and stick the short sides of the electrode end faces of the square power battery tightly, so that the top short sides of the packaging are more firm, making the packaging more firm, and realizing the operations of detecting the square power batteries and removing unqualified products.

[0027] As Figures 1 to 11As shown in the figure, for a fully automatic film wrapping machine for square power batteries of the present invention, during operation, first, the unwinding reel assembly 27 unfolds the PET film downward by a certain length, then makes incisions through four cutting knives 31, and cuts off the upper end of the PET film through the cutting knife 35, so that the cut PET film is located in front of the two front rollers 10. The pushing mechanism 1 acts to push the square power battery between the two front rollers 10. After the bottom surface of the square power battery presses against the middle of the PET film, it is fed between the two front rollers 10 and multiple rear rollers 11. Then, the two front rollers 10 roll to clamp the square power battery, and the pushing mechanism 1 continues to push the square power battery to the two side folding edge assemblies 6. The two sliding tables 13 are lifted and lowered synchronously, so that the four cross rollers 16 fold the left and right edges of the PET film respectively and roll and stick them tightly to the left and right side walls of the square power battery. The pushing mechanism 1 continues to push the square power battery backward through the two vertical rollers 7. The two vertical rollers 7 fold the PET film on both sides of the bottom of the square power battery and roll and stick it tightly to the left and right side walls of the square power battery, realizing the full-automatic film wrapping of the square power battery. Then, the pushing mechanism 1 continues to act to push the square power battery with the film wrapped out of the two large surface roller groups 5 and the two vertical rollers 7 and directly load it into the clamping seat 36. The conveyor belt mechanism 3 drives multiple square power batteries to move through multiple clamping seats 36. When the square power battery passes through the gantry 37 and the visual inspection mechanism 38, the visual inspection mechanism 38 detects the film wrapping quality of the square power battery. The first push rod 39 pushes the square power battery with unqualified film wrapping out of the clamping seat 36, and the second push rod 40 pushes the square power battery with qualified film wrapping into the hot pressing station 41. After the hot pressing station 41 positions the square power battery, the hot pressing plate assembly acts to hot press and stick the short side of the electrode end face of the square power battery tightly, making the top short side of the film wrapping more firm. Finally, the square power battery in the hot pressing station 41 is pushed out by the subsequent square power battery to complete the blanking.

[0028] The main functions achieved by the present invention are as follows: 1. Automatically wrap the bottom surface and two large side surfaces of the square power battery in one station, and automatically fold the PET film on the side and bottom to the side wall of the square power battery. It has a high integration degree and a simpler structure; 2. There is no need to set multiple transfer manipulators between multiple conveyor lines to transfer the square power battery multiple times, which is beneficial to improving work efficiency and saving costs; 3. It can automatically cut and trim the PET film; 4. It can perform the detection of the square power battery and the operation of removing unqualified products.

[0029] A fully automatic film wrapping machine for square power batteries of the present invention has a common mechanical installation method, connection method or setting method, and any implementation that can achieve its beneficial effects can be carried out; the feeding mechanism 1, unwinding mechanism 2, conveyor belt mechanism 3, large surface roller group 5, vertical roller 7, first telescopic rod 8, first spring 9, front roller 10, rear roller 11, slide bar 12, slide table 13, double roller frame 15, horizontal roller 16, rotating shaft 17, first torsion spring 18, first slider 19, second spring 20, first inclined rod 21, third spring 22, bottom roller 23, second inclined rod 24, fourth spring 25, bottom roller 26, unwinding shaft assembly 27, vertical shaft 30, cutting knife 31, driving wheel 32, transmission belt 33, tool holder 34, cutting tool 35, clamping seat 36, visual inspection mechanism 38, first push rod 39, second push rod 40, hot pressing station 41, driving motor 42, cam 43 of the fully automatic film wrapping machine for square power batteries of the present invention are purchased on the market, and those skilled in the art only need to install and operate according to the attached operation manual, without the need for those skilled in the art to make creative efforts.

[0030] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A fully automatic film wrapping machine for square power batteries, comprising a material pushing mechanism (1), a film unwinding mechanism (2) and a conveyor belt mechanism (3). The film unwinding mechanism (2) is used for loading and conveying PET films, the material pushing mechanism (1) is used for pushing square power batteries, and the conveyor belt mechanism (3) is used for conveying the square power batteries wrapped with films backward; it is characterized in that, It also includes a film wrapping frame (4), two large surface roller groups (5), two side edge folding assemblies (6) and two vertical rollers (7). The film wrapping frame (4) is installed between the unwinding mechanism (2) and the conveyor belt mechanism (3). The two large surface roller groups (5) are respectively installed oppositely on the upper and lower parts of the film wrapping frame (4). The two large surface roller groups (5) are used for rolling the PET films on the upper and lower end faces of the square power battery. The two side edge folding assemblies (6) are respectively installed on the left and right sides of the film wrapping frame (4). The two side edge folding assemblies (6) are respectively located on the left and right sides of the two large surface roller groups (5). The two side edge folding assemblies (6) are used for folding and rolling the PET films on the left and right side walls of the square power battery. The two vertical rollers (7) are respectively installed rotatably and vertically oppositely on the left and right sides of the film wrapping frame (4). The two vertical rollers (7) are respectively located behind the two side edge folding assemblies (6).

2. The fully automatic film wrapping machine for square power batteries according to claim 1, characterized in that, The large surface roller group (5) includes a plurality of first telescopic rods (8), a plurality of first springs (9), a front roller (10) and a plurality of rear rollers (11). The plurality of first telescopic rods (8) are installed on the left and right parts of the film wrapping frame (4). The plurality of first springs (9) are installed on the plurality of first telescopic rods (8). The two ends of the front roller (10) and the plurality of rear rollers (11) are respectively rotatably connected to the plurality of first telescopic rods (8). The front roller (10) is located in front of the plurality of rear rollers (11). The length of the front roller (10) is greater than the length of the square power battery. The lengths of the plurality of rear rollers (11) are less than the length of the square power battery.

3. The fully automatic film wrapping machine for square power batteries according to claim 2, characterized in that, The side edge folding assembly (6) includes a slide bar (12), a slide table (13), a cross frame (14), a double roller frame (15) and two cross rollers (16). The slide bar (12) is vertically installed on the left and right sides of the film wrapping frame (4). The slide bar (12) is located outside the plurality of rear rollers (11). The slide table (13) is slidably installed on the slide bar (12) in a liftable manner. The cross frame (14) is installed on the slide table (13). The double roller frame (15) is installed on the cross frame (14). The upper and lower ends of the double roller frame (15) are respectively rotatably installed with cross rollers (16). The two cross rollers (16) are horizontally arranged. The distance between the two cross rollers (16) is greater than the thickness of the square power battery.

4. The fully automatic film wrapping machine for square power batteries according to claim 3, characterized in that, It also includes two rotating shafts (17) and two first torsion springs (18). The middle parts of the two double roller frames (15) are respectively hinged to the two cross frames (14) through the two rotating shafts (17). One ends of the two first torsion springs (18) are respectively connected to the two cross frames (14). The other ends of the two first torsion springs (18) are respectively connected to the two rotating shafts (17). The two first torsion springs (18) elastically support the two double roller frames (15) respectively.

5. The fully automatic film wrapping machine for square power batteries according to claim 1, characterized in that, It also includes four first sliders (19) and four second springs (20). The upper and lower ends of the two vertical rollers (7) are respectively installed with first sliders (19). The four first sliders (19) are respectively slidably installed on the left and right sides at the rear end of the film wrapping frame (4). The outer ends of the four second springs (20) are connected to the film wrapping frame (4). The inner ends of the four second springs (20) are respectively connected to the four first sliders (19). The elastic forces of the four second springs (20) push the four first sliders (19) towards the inner side of the film wrapping frame (4).

6. The fully automatic film wrapping machine for square power batteries according to claim 1, characterized in that, It further includes two diagonal bars one (21), two springs three (22), bottom roller one (23), two diagonal bars two (24), two springs four (25) and bottom roller two (26). The two diagonal bars one (21) are respectively installed on the left and right sides of the lower part of the front end of the film wrapping frame (4). The two diagonal bars one (21) are arranged obliquely. Springs three (22) are installed in the middle of the two diagonal bars one (21). The two ends of the bottom roller one (23) are respectively rotatably connected to the upper ends of the two diagonal bars one (21). The two diagonal bars two (24) are respectively installed on the left and right sides of the upper part of the front end of the film wrapping frame (4). The two diagonal bars two (24) are arranged obliquely. Springs four (25) are installed in the middle of the two diagonal bars two (24). The two ends of the bottom roller two (26) are respectively rotatably connected to the lower ends of the two diagonal bars two (24). The bottom roller one (23) and the bottom roller two (26) are horizontally arranged between the two large surface roller groups (5).

7. The fully automatic film wrapping machine for square power batteries according to claim 1, characterized in that, It further includes a unwind reel assembly (27), a lower cross beam (28), an upper cross beam (29), two vertical shafts (30), four cutting knives (31), two transmission wheels (32) and a transmission belt (33). The unwind reel assembly (27) for loading the PET film reel is arranged at the upper part of the unwind mechanism (2). The lower cross beam (28) and the upper cross beam (29) are both installed below the unwind reel assembly (27). Clamping components for clamping the PET film are arranged in the middle of the lower cross beam (28) and the upper cross beam (29). The upper ends of the two vertical shafts (30) are rotatably connected to the upper cross beam (29), and the lower ends of the two vertical shafts (30) are rotatably connected to the lower cross beam (28). The two vertical shafts (30) are respectively located on both sides of the clamping components of the lower cross beam (28) and the upper cross beam (29). Two cutting knives (31) are installed on each of the two vertical shafts (30). The two cutting knives (31) are respectively flush with the upper end face and the lower end face of the square power battery. The two transmission wheels (32) are respectively concentrically installed at the upper ends of the two vertical shafts (30), and the transmission belt (33) is sleeved on the two transmission wheels (32).

8. The fully automatic film wrapping machine for square power batteries according to claim 7, characterized in that, It further includes a tool holder (34) and a cutting knife (35). The tool holder (34) is installed on the transmission belt (33), and the cutting knife (35) is installed on the tool holder (34).

9. The fully automatic film wrapping machine for square power batteries according to claim 1, characterized in that, It further includes a plurality of clamping seats (36), a gantry (37), a vision inspection mechanism (38), a first push rod (39), a second push rod (40) and a hot pressing station (41). The plurality of clamping seats (36) are evenly installed on the conveyor belt mechanism (3). The plurality of clamping seats (36) are used to clamp the square power batteries after being loaded with packaging films. The front end of the conveyor belt mechanism (3) is aligned with the middle parts of the two large surface roller groups (5), so that the clamping seats (36) in the horizontal state at the front end of the conveyor belt mechanism (3) are aligned with the middle parts of the two large surface roller groups (5). The gantry (37) is installed at the upper front end of the frame of the conveyor belt mechanism (3), and the vision inspection mechanism (38) is installed on the gantry (37). The first push rod (39) and the second push rod (40) are installed on the rear frame of the conveyor belt mechanism (3). The first push rod (39) is used to push out the unqualified square power batteries from the clamping seats (36). The hot pressing station (41) is installed on the frame of the conveyor belt mechanism (3). The hot pressing station (41) is located on the other side of the second push rod (40). The length of the hot pressing station (41) is greater than the length of the square power battery. A hot pressing plate assembly is arranged inside the hot pressing station.

10. The fully automatic film wrapping machine for square power batteries according to claim 9, characterized in that, It further includes two drive motors (42) and two cams (43). The two drive motors (42) are respectively installed on the left and right parts of the gantry (37), and the two cams (43) are respectively installed on the output shafts of the two drive motors (42).

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