A lithium battery aluminum-plastic film and its preparation process

Abstract

The present invention discloses a lithium battery aluminum plastic film and its preparation process, which relates to the technical field of aluminum plastic films. The aluminum plastic film includes a plastic film, an aluminum foil, an adhesive, and an anti-corrosion coating. The aluminum plastic film is formed by laminating a roll of plastic film and a roll of aluminum foil. The bonding part between the plastic film and the aluminum foil is adhered with an adhesive. After the plastic film and the aluminum foil are laminated together, an anti-corrosion coating is sprayed. The adhesive is a mixture of modified polyester polyol, polyether polyol, polyisocyanate monomer, epoxy resin, chain extender, catalyst, and auxiliary agent. The plastic film is composed of multiple layers of polypropylene, and its internal structure includes multiple layers, including a corona layer, a heat-resistant layer, and a heat-sealing layer. By spraying the adhesive on the surface of the aluminum foil, and then after the plastic film and the aluminum foil are laminated together, the plastic film and the aluminum foil are laminated together by a hot pressing device, and then the quality of the finished product is inspected to ensure that its barrier property and puncture resistance meet the standards. Finally, the aluminum plastic film is wound up by a winding mechanism for winding and transporting for shipment.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum-plastic films, and specifically to a lithium battery aluminum-plastic film and its preparation process. Background Art

[0002] An aluminum-plastic film is a composite material used for encapsulating lithium-ion batteries, mainly used in soft-pack batteries and blade batteries. It has characteristics such as high barrier property, good cold stamping formability, puncture resistance, electrolyte resistance stability, and insulation. These properties enable the aluminum-plastic film to perform well in protecting internal electrodes and isolating the external environment. At the same time, different adhesives are required when manufacturing the aluminum-plastic film, and adhesives with different compositions can bring more beneficial effects to the aluminum-plastic film.

[0003] However, in the current prior art, due to the many usage scenarios of the aluminum-plastic film and the need to contact a large amount of corrosive substances when coating lithium batteries, the aluminum-plastic film will gradually be corroded during long-term use, posing a safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to provide a lithium battery aluminum-plastic film and its preparation process to solve the deficiencies in the above-mentioned prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: The aluminum-plastic film includes a plastic film, an aluminum foil, an adhesive, and an anti-corrosion coating. The aluminum-plastic film is formed by laminating a roll of plastic film and a roll of aluminum foil. The adhesive is used to bond the contact area between the plastic film and the aluminum foil. After the plastic film and the aluminum foil are laminated together, an anti-corrosion coating is sprayed. The adhesive is a mixture of modified polyester polyol, polyether polyol, polyisocyanate monomer, epoxy resin, chain extender, catalyst, and additive. The plastic film is composed of multiple layers of polypropylene, which are divided into multiple layers inside, including a corona layer, a heat-resistant layer, and a heat-sealing layer;

[0006] A preparation process for a lithium battery aluminum-plastic film, used to produce the above-mentioned aluminum-plastic film, includes the following steps:

[0007] S1. Spray the adhesive on the surface of the aluminum foil;

[0008] S2. After the plastic film and the aluminum foil are laminated together, laminate the plastic film and the aluminum foil layer by layer through a hot pressing device;

[0009] S3. Conduct quality inspection on the finished product to ensure that its barrier property and puncture resistance meet the standards;

[0010] S4. Wind up and transport the aluminum-plastic film through a winding mechanism for shipment;

[0011] The winding mechanism includes a support frame, on which a driving source is provided. The driving source can drive the first set of cutting knives to cut the aluminum-plastic film. When the driving source drives the first set of cutting knives to cut the aluminum-plastic film, it can drive the adhesion between the aluminum-plastic film and the adhesive tape in the coating assembly.

[0012] During the reset process of the driving source, it can drive the winding assembly to wind the aluminum-plastic film. At this time, when the aluminum-plastic film is wound, it can drive the adhesive tape to wind the aluminum-plastic film.

[0013] After the adhesive tape winds the aluminum-plastic film, the reset movement of the driving source can drive the cutting assembly to cut the adhesive tape.

[0014] Further, a connecting plate is provided at the output end of the driving source. The first set of cutting knives includes a first cutting knife provided on the connecting plate. The first cutting knife group further includes a second cutting knife provided on the support frame.

[0015] Further, the coating assembly includes a first spring telescopic rod provided at the bottom of the connecting plate. A pressing plate is provided at the output end of the first spring telescopic rod. The coating assembly includes a first winding shaft threadedly connected to the support frame. A roll of adhesive tape is provided on the first winding shaft. A support plate is connected to the first winding shaft.

[0016] The coating assembly further includes two first tooth conditions slidably connected to the support frame. The two first tooth conditions are respectively located on both sides of the support plate in a one-to-one correspondence. The two first tooth conditions are respectively meshed with two first gear members. The two first gear members are both rotatably connected to the support frame. The two first gear members are respectively meshed with two second tooth conditions. The two second tooth conditions are both slidably connected to the support frame. Two second spring telescopic rods are respectively provided at the bottoms of the two first tooth conditions. The two second spring telescopic rods are both provided on the support frame. A clamping groove is provided on each of the two second tooth conditions. A limiting rod is provided at the top of the two second tooth conditions. An arc surface is provided on the limiting rod.

[0017] Further, the coating assembly further includes two support rods provided on the support frame. A sliding cavity is provided on each of the two support rods. A guide rail is provided on both sides of the inner part of each of the two sliding cavities. A spring telescopic member is slidably connected in each of the two sliding cavities. A limiting member is provided on both sides of each of the two spring telescopic members. The four limiting members are respectively slidably connected in the four guide rails in a one-to-one correspondence.

[0018] The covering assembly further includes two telescopic sleeves respectively and correspondingly arranged in the two support rods. Each of the two telescopic sleeves is provided with a spring member. The two spring members are respectively connected to the two connecting rods. The two connecting rods are respectively slidably connected in the two telescopic sleeves. The two connecting rods are respectively and correspondingly connected to the two clamping members. One end of each of the two clamping members away from the connecting rod penetrates to the outside of the support rod. The two clamping members are respectively and correspondingly in position corresponding to the two clamping grooves.

[0019] Further, the covering assembly further includes two first wires, one ends of which are respectively and correspondingly connected to the two spring telescopic members. The other ends of the two first wires respectively and correspondingly penetrate into the two telescopic sleeves. One ends of the two first wires located inside the telescopic sleeves are respectively and correspondingly connected to the two connecting rods.

[0020] Further, the covering assembly further includes two first abutting rods arranged on both sides of the connecting plate. The two first abutting rods are respectively and correspondingly in position corresponding to the two first tooth conditions. The covering assembly further includes two second abutting rods arranged on both sides of the connecting plate. The two second abutting rods are respectively and correspondingly in position corresponding to the two clamping members.

[0021] Further, the winding assembly includes a motor rotatably connected to the support frame. The output end of the motor is arranged at one end of the second winding shaft. The other end of the second winding shaft is provided with a first ratchet member. One end of a second wire is connected to the outer ring of the first ratchet member. The other end of the second wire is connected to the top of the connecting plate. The outer ring of the first ratchet member is connected to the output end of a torsion spring member. The torsion spring member is arranged on the support frame.

[0022] Further, the cutting assembly includes two third spring telescopic rods arranged on the support frame. The output ends of the two third spring telescopic rods are provided with a third cutter. The cutting assembly further includes a fourth cutter arranged on the support frame. The fourth cutter is in position corresponding to the third cutter.

[0023] Further, the cutting assembly further includes a fixing member arranged on the support frame. Two second ratchet members are respectively rotatably connected to both sides of the fixing connection. The outer rings of the two second ratchet members are both meshed with a third tooth condition. The third tooth condition is slidably connected to the support frame. A limiting block is arranged on the third tooth condition. The limiting block is in position corresponding to the connecting plate. The inner rings of the two second ratchet members are respectively and correspondingly rotatably connected to one ends of two transmission rods. The other ends of the two transmission rods are respectively and correspondingly rotatably connected to two fixing blocks. Both of the two fixing blocks are connected to the third cutter.

[0024] In the above technical solution, a lithium battery aluminum plastic film and its preparation process provided by the present invention drive a first cutter group to cut the aluminum plastic film by starting a driving source, make the aluminum plastic film adhere to the adhesive tape through a coating component, and then drive the adhesive tape to wind the aluminum plastic film under the reset movement of the driving source so that the aluminum plastic film is tightened. Then, the cutting component cuts the adhesive tape, enabling the aluminum plastic film to be quickly tightened and limited after one roll, preventing the aluminum plastic film from loosening during transportation, making it more convenient to transport the aluminum plastic film, and the tightened aluminum plastic film is more conducive to the next use and prevents damage caused by the loosening of the aluminum plastic film during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0026] Figure 1 One of the overall structural schematic diagrams provided by the embodiment of the present invention;

[0027] Figure 2 Another overall structural schematic diagram provided by the embodiment of the present invention;

[0028] Figure 3 Another overall structural schematic diagram provided by the embodiment of the present invention;

[0029] Figure 4 One of the internal structural schematic diagrams provided by the embodiment of the present invention;

[0030] Figure 5 Another internal structural schematic diagram provided by the embodiment of the present invention;

[0031] Figure 6 Provided by the embodiment of the present invention Figure 5 Enlarged structural schematic diagram of part A;

[0032] Figure 7 One of the partial structural sectional schematic diagrams provided by the embodiment of the present invention;

[0033] Figure 8 Provided by the embodiment of the present invention Figure 7 Enlarged structural schematic diagram of part B;

[0034] Figure 9 Another partial structural sectional schematic diagram provided by the embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. Support frame; 2. Driving source; 3. First set of cutting knives; 31. Connecting plate; 32. First cutting knife; 33. Second cutting knife; 4. Coating component; 41. First spring telescopic rod; 42. Pressing plate; 43. First winding shaft; 45. Support plate; 46. First tooth condition; 47. First gear component; 48. Second tooth condition; 49. Second spring telescopic rod; 410. Limiting rod; 411. Support rod; 412. Guide rail; 413. Spring telescopic component; 414. Limiting component; 415. Telescopic sleeve; 416. Spring component; 417. Connecting rod; 418. Clamping component; 419. First wire; 420. First abutting rod; 421. Second abutting rod; 5. Winding component; 51. Motor; 52. Second winding shaft; 53. First ratchet component; 54. Second wire; 55. Torsion spring component; 6. Cutting component; 61. Third spring telescopic rod; 62. Third cutting knife; 63. Fourth cutting knife; 64. Fixing component; 65. Second ratchet component; 66. Third tooth condition; 67. Limiting block; 68. Transmission rod; 69. Fixed block. Detailed implementation manner

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] Please refer to Figures 1-9 , the aluminum-plastic film provided by the embodiment of the present invention is prepared from the following raw materials: the aluminum-plastic film includes a plastic film, an aluminum foil, an adhesive, and an anti-corrosion coating. The aluminum-plastic film is a roll of plastic film and a roll of aluminum foil that are mutually attached. The adhesive is used to bond the joint between the plastic film and the aluminum foil. After the plastic film and the aluminum foil are mutually attached, an anti-corrosion coating is sprayed. Among them, the adhesive is a mixture of modified polyester polyol, polyether polyol, polyisocyanate monomer, epoxy resin, chain extender, catalyst, and auxiliary agent. The plastic film is composed of multiple layers of polypropylene, and it is divided into multiple layers inside, including a corona layer, a heat-resistant layer, and a heat-sealing layer.

[0039] Preferably, the preparation process of the plastic film includes:

[0040] S1. Spray the adhesive on the surface of the aluminum foil;

[0041] S2. After the plastic film and the aluminum foil are mutually attached, laminate the plastic film and the aluminum foil together through a hot pressing device;

[0042] S3. Conduct quality inspection on the finished product to ensure that its barrier property and puncture resistance meet the standards;

[0043] S4. Wind and transport the aluminum-plastic film through a winding mechanism for shipment;

[0044] The winding mechanism includes a support frame 1, on which a driving source 2 is provided. The driving source 2 can drive the first set of cutting knives 3 to cut the aluminum-plastic film. When the driving source 2 drives the first set of cutting knives 3 to cut the aluminum-plastic film, it can drive the aluminum-plastic film to adhere to the adhesive tape in the coating assembly 4;

[0045] During the reset process of the driving source 2, it can drive the winding assembly 5 to wind the aluminum-plastic film. At this time, when the aluminum-plastic film is wound, it can drive the adhesive tape to wind the aluminum-plastic film;

[0046] After the adhesive tape winds the aluminum-plastic film, the reset movement of the driving source 2 can drive the cutting assembly 6 to cut the adhesive tape.

[0047] Preferably, a connecting plate 31 is provided at the output end of the driving source 2. The first set of cutting knives 3 includes a first cutting knife 32 provided on the connecting plate 31, and the first set of cutting knives 3 also includes a second cutting knife 33 provided on the support frame 1. Through the cooperation between the first cutting knife 32 and the second cutting knife 33, the aluminum-plastic film can be cut.

[0048] Preferably, the coating assembly 4 includes a first spring telescopic rod 41 provided at the bottom of the connecting plate 31. A pressing plate 42 is provided at the output end of the first spring telescopic rod 41. The coating assembly 4 includes a first winding shaft 43 threadedly connected to the support frame 1. A roll of adhesive tape is provided on the first winding shaft 43, and a support plate 45 is connected to the first winding shaft 43;

[0049] The coating assembly 4 further includes two first tooth conditions 46 slidably connected to the support frame 1. The two first tooth conditions 46 are respectively located on both sides of the support plate 45 in a one-to-one correspondence. The two first tooth conditions 46 are respectively meshed with two first gear members 47. The two first gear members 47 are both rotatably connected to the support frame 1. The two first gear members 47 are respectively meshed with two second tooth conditions 48. The two second tooth conditions 48 are both slidably connected to the support frame 1. Two second spring telescopic rods 49 are respectively provided at the bottoms of the two first tooth conditions 46. The two second spring telescopic rods 49 are both provided on the support frame 1. A clamping groove is provided on each of the two second tooth conditions 48. A limiting rod 410 is provided at the top of the two second tooth conditions 48. An arc surface is provided on the limiting rod 410. Through the setting of the arc surface, the adhesive tape is only clamped at the position of the arc surface. When the limiting rod 410 moves upward, the arc surface still contacts the adhesive part of the adhesive tape. However, when the adhesive tape is wound onto the aluminum-plastic film, due to the pulling force and the design of the arc surface, the adhesive tape quickly releases the adhesion with the arc surface, so that the limiting rod 410 does not limit the adhesive tape at this time.

[0050] Preferably, the covering assembly 4 further includes two support rods 411 disposed on the support frame 1. A sliding cavity is formed in each of the two support rods 411. A guide rail 412 is formed on each of the two inner sides of the two sliding cavities. A spring telescopic member 413 is slidably connected in each of the two sliding cavities. A limiting member 414 is disposed on each of the two sides of the two spring telescopic members 413. The four limiting members 414 are respectively and slidably connected in the four guide rails 412 one by one;

[0051] The covering assembly 4 further includes two telescopic sleeves 415 respectively disposed in the two support rods 411 one by one. A spring member 416 is disposed in each of the two telescopic sleeves 415. The two spring members 416 are respectively connected to the two connecting rods 417. The two connecting rods 417 are respectively slidably connected in the two telescopic sleeves 415. The two connecting rods 417 are respectively connected to the two clamping members 418 one by one. One end of each of the two clamping members 418 away from the connecting rod 417 penetrates outside the support rod 411. The two clamping members 418 are respectively and correspondingly positioned with the two clamping grooves.

[0052] Preferably, the covering assembly 4 further includes two first wires 419 respectively connected to the two spring telescopic members 413 at one end. The other ends of the two first wires 419 respectively penetrate into the two telescopic sleeves 415. One end of each of the two first wires 419 located inside the telescopic sleeve 415 is respectively connected to the two connecting rods 417 one by one.

[0053] Preferably, the covering assembly 4 further includes two first abutting rods 420 disposed on both sides of the connecting plate 31. The two first abutting rods 420 are respectively and correspondingly positioned with the two first tooth conditions 46. The covering assembly 4 further includes two second abutting rods 421 disposed on both sides of the connecting plate 31. The two second abutting rods 421 are respectively and correspondingly positioned with the two clamping members 418. Through the arrangement of the clamping rod, when the driving source 2 is reset, the limiting rod 410 will not be immediately reset. Instead, after the driving source 2 is reset, the adhesive tape drives the aluminized plastic film to be tightly adhered so that it will not loosen. And after the cutting assembly 6 cuts the adhesive tape, at this time, the connecting plate 31 drives the second abutting rod 421 to contact the spring telescopic member 413, so that the clamping member 418 withdraws from the clamping groove, so that the limiting rod 410 is reset, so that the adhesive tape is limited again, so that the adhesive tape can be quickly limited after being cut.

[0054] Preferably, the winding assembly 5 includes a motor 51 rotatably connected to the support frame 1. The output end of the motor 51 is disposed at one end of the second winding shaft 52. The other end of the second winding shaft 52 is provided with a first ratchet member 53. One end of a second wire 54 is connected to the outer ring of the first ratchet member 53. The other end of the second wire 54 is connected to the top of the connecting plate 31. The outer ring of the first ratchet member 53 is connected to the output end of a torsion spring member 55. The torsion spring member 55 is disposed on the support frame 1. The arrangement of the second wire 54 enables the second winding shaft 52 to rotate rapidly when the driving source 2 is reset and drives the connecting plate 31 to move upward, so that the adhesive tape can be rapidly wound onto the aluminum-plastic film roll.

[0055] Preferably, the cutting assembly 6 includes two third spring telescopic rods 61 disposed on the support frame 1. The output ends of the two third spring telescopic rods 61 are provided with a third cutter 62. The cutting assembly 6 further includes a fourth cutter 63 disposed on the support frame 1. The fourth cutter 63 corresponds to the position of the third cutter 62.

[0056] Preferably, the cutting assembly 6 further includes a fixing member 64 disposed on the support frame 1. Two second ratchet members 65 are respectively rotatably connected to both sides of the fixed connection. The outer rings of the two second ratchet members 65 are both engaged with a third toothed member 66. The third toothed member 66 is slidably connected to the support frame 1. A limiting block 67 is disposed on the third toothed member 66. The limiting block 67 corresponds to the position of the connecting plate 31. The inner rings of the two second ratchet members 65 are respectively rotatably connected to one ends of two transmission rods 68. The other ends of the two transmission rods 68 are respectively rotatably connected to two fixing blocks 69. Both of the two fixing blocks 69 are connected to the third cutter 62. The arrangement of the second ratchet members 65 enables the third cutter 62 not to move when the driving source 2 drives the connecting plate 31 to move downward.

[0057] Working principle: By starting the driving source 2 to drive the connecting plate 31 to move, the first cutter 32 moves downward. At the same time, the downward movement of the connecting plate 31 drives the first spring telescopic rod 41 to move downward, so that the pressing plate 42 moves downward, so that the pressing plate 42 contacts the aluminum-plastic film, so that the aluminum-plastic film is pressed downward and adhered to the adhesive tape. At the same time, the first cutter 32 moves downward and contacts the second cutter 33, so that the aluminum-plastic film is cut;

[0058] At the same time, when the connecting plate 31 moves downward, it drives two first abutting rods 420 and two second abutting rods 421 to move downward. When the two second abutting rods 421 move downward, they contact two spring telescopic members 413. By arranging the tops of the outer ends of the two spring telescopic members 413 located outside the limiting rod 410 to be arc-shaped surfaces, the two spring telescopic members 413 contract, so that the two second abutting rods 421 respectively move to the lower sides of the two spring telescopic members 413 one by one;

[0059] When the two first abutting rods 420 move downward, they contact the two first tooth conditions 46, causing the two first tooth conditions 46 to move downward, driving the contraction of the two second spring telescopic members 413, causing the two first gear members 47 to rotate, driving the two second tooth conditions 48 to move upward, driving the limiting rod 410 to move upward, so that the limiting rod 410 no longer presses and limits the adhesive tape. At the same time, when the two second tooth conditions 48 move upward, they drive the two clamping grooves to move upward, so that the two clamping members 418 are respectively clamped with the two clamping grooves in a one-to-one correspondence;

[0060] When the connecting plate 31 moves downward, due to the weight of the third tooth condition 66, the third tooth condition 66 moves downward, driving the outer rings of the two second ratchet members 65 to rotate. Due to the setting of the second ratchet members 65, the two transmission rods 68 will not move;

[0061] While the driving source 2 drives the connecting plate 31 to move downward, it drives the second wire 54 to be pulled, causing the outer ring of the first ratchet member 53 to be pulled and rotated, causing the torsion spring member 55 to rotate and store energy. Due to the setting of the first ratchet member 53, the rotation of the outer ring of the first ratchet member 53 at this time cannot drive the first winding shaft 43 to rotate;

[0062] After that, the driving source 2 resets and drives the connecting plate 31 to move upward, causing the torsion spring member 55 to gradually release and drive the ratchet member to rotate, causing the second winding shaft 52 to rotate, causing the aluminum-plastic film to be wound, and causing the adhesive tape to be wound around the aluminum-plastic film roll, so that the aluminum-plastic film roll is wound and limited by the adhesive tape roll;

[0063] When the connecting plate 31 moves upward, it contacts the limiting block 67, causing the third tooth condition 66 to move upward, causing the two second ratchet members 65 to rotate, driving the two transmission rods 68 to move, causing the third cutter 62 to move downward and cooperate with the fourth cutter 63 to cut the adhesive tape. After that, as the two transmission rods 68 move, the third cutter 62 resets;

[0064] When the connecting plate 31 moves upward, it drives the two second abutting rods 421 to move upward, causing the two second abutting rods 421 to contact the two spring telescopic members 413, causing the two spring telescopic members 413 to move upward, causing the four limiting members 414 to slide in the four guide rails 412. When the two spring telescopic members 413 move upward, they pull the two first wires 419, causing the two connecting rods 417 to slide, driving the two clamping members 418 to move, so that the two clamping members 418 no longer engage with the two clamping grooves. At this time, the two second spring telescopic members 413 are released, driving the two first tooth conditions 46 to be released, driving the two first gear members 47 to rotate, driving the two second tooth conditions 48 to move downward and reset, causing the limiting rod 410 to move downward, so that the adhesive tape is clamped and limited again.

[0065] Only certain exemplary embodiments of the present invention have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A lithium battery aluminum plastic film, characterized in that: The aluminum-plastic film comprises a plastic film, an aluminum foil, an adhesive, and an anti-corrosion coating. The aluminum-plastic film is formed by laminating a roll of plastic film and a roll of aluminum foil. The bonding area between the plastic film and the aluminum foil is adhered with an adhesive. After the plastic film and the aluminum foil are laminated together, an anti-corrosion coating is sprayed. The adhesive is a mixture of a modified polyester polyol, a polyether polyol, a polyisocyanate monomer, an epoxy resin, a chain extender, a catalyst, and an auxiliary agent. The plastic film is composed of multiple layers of polypropylene and is internally divided into multiple layers, including a corona layer, a heat-resistant layer, and a heat-sealing layer; The preparation process of the lithium battery aluminum-plastic film includes the following steps: S1. Spray the adhesive on the surface of the aluminum foil; S2. After the plastic film and the aluminum foil are laminated together, laminate the plastic film and the aluminum foil together through a hot-pressing device; S3. Conduct quality inspection on the finished product to ensure that its barrier property and puncture resistance meet the standards; S4. Wind up and transport the aluminum-plastic film through a winding mechanism for shipment; The winding mechanism includes a support frame (1). A driving source (2) is arranged on the support frame (1). The driving source (2) can drive a first set of cutting knives (3) to cut the aluminum-plastic film. When the driving source (2) drives the first set of cutting knives (3) to cut the aluminum-plastic film, it can drive the aluminum-plastic film to adhere to the adhesive tape inside the covering component (4); During the reset process of the driving source (2), it can drive a winding component (5) to wind up the aluminum-plastic film. At this time, when the aluminum-plastic film is wound up, it can drive the adhesive tape to wind up the aluminum-plastic film; After the adhesive tape winds up the aluminum-plastic film, the reset movement of the driving source (2) can drive a cutting component (6) to cut the adhesive tape; A connecting plate (31) is arranged at the output end of the driving source (2). The first set of cutting knives (3) includes a first cutting knife (32) arranged on the connecting plate (31). The first set of cutting knives (3) also includes a second cutting knife (33) arranged on the support frame (1); The covering component (4) includes a first spring telescopic rod (41) arranged at the bottom of the connecting plate (31). A pressing plate (42) is arranged at the output end of the first spring telescopic rod (41). The covering component (4) includes a first winding shaft (43) threadedly connected to the support frame (1). A roll of adhesive tape is arranged on the first winding shaft (43). A support plate (45) is connected to the first winding shaft (43); The covering component (4) further includes two first tooth members (46) slidably connected to the support frame (1). The two first tooth members (46) are respectively located on both sides of the support plate (45) in a one-to-one correspondence. The two first tooth members (46) are respectively meshed with two first gear members (47). The two first gear members (47) are both rotatably connected to the support frame (1). The two first gear members (47) are respectively meshed with two second tooth members (48). The two second tooth members (48) are both slidably connected to the support frame (1). At the bottoms of the two first tooth members (46), two second spring telescopic rods (49) are respectively arranged. The two second spring telescopic rods (49) are both arranged on the support frame (1). Each of the two second tooth members (48) is provided with a clamping groove. At the tops of the two second tooth members (48), a limiting rod (410) is arranged. An arc surface is arranged on the limiting rod (410).

2. The aluminum-plastic film for lithium battery according to claim 1, wherein, The covering component (4) further includes two support rods (411) arranged on the support frame (1). Each of the two support rods (411) is provided with a sliding cavity. On both sides of the interior of each of the two sliding cavities, a guide rail (412) is respectively arranged. In each of the two sliding cavities, a spring telescopic member (413) is slidably connected. On both sides of each of the two spring telescopic members (413), a limiting member (414) is respectively arranged. The four limiting members (414) are respectively slidably connected in the four guide rails (412) in a one-to-one correspondence; The covering component (4) further includes two telescopic sleeves (415) respectively arranged in the two support rods (411) in a one-to-one correspondence. In each of the two telescopic sleeves (415), a spring member (416) is arranged. The two spring members (416) are respectively connected to two connecting rods (417). The two connecting rods (417) are respectively slidably connected in the two telescopic sleeves (415). The two connecting rods (417) are respectively connected to two clamping members (418) in a one-to-one correspondence. One ends of the two clamping members (418) far from the connecting rods (417) both penetrate to the outside of the support rods (411). The two clamping members (418) are respectively corresponding to the positions of the two clamping grooves in a one-to-one correspondence.

3. The aluminum-plastic film for lithium battery according to claim 2, wherein The covering component (4) further includes two first wires (419) with one ends respectively connected to the two spring telescopic members (413) in a one-to-one correspondence. The other ends of the two first wires (419) respectively penetrate to the interiors of the two telescopic sleeves (415). The ends of the two first wires (419) located inside the telescopic sleeves (415) are respectively connected to the two connecting rods (417) in a one-to-one correspondence.

4. The aluminum-plastic film for a lithium battery according to claim 3, wherein, The covering assembly (4) further includes two first abutting rods (420) disposed on both sides of the connecting plate (31). The two first abutting rods (420) are respectively in one-to-one correspondence with the positions of the two first tooth conditions (46). The covering assembly (4) further includes two second abutting rods (421) disposed on both sides of the connecting plate (31). The two second abutting rods (421) are respectively in one-to-one correspondence with the positions of the two clamping members (418).

5. A lithium battery aluminum plastic film according to claim 3, characterized in that, The winding assembly (5) includes a motor (51) rotatably connected to the support frame (1). The output end of the motor (51) is disposed at one end of a second winding shaft (52). A first ratchet member (53) is disposed at the other end of the second winding shaft (52). One end of a second wire (54) is connected to the outer ring of the first ratchet member (53). The other end of the second wire (54) is connected to the top of the connecting plate (31). The outer ring of the first ratchet member (53) is connected to the output end of a torsion spring member (55). The torsion spring member (55) is disposed on the support frame (1).

6. The aluminum-plastic film for lithium battery according to claim 3, wherein, The cutting assembly (6) includes two third spring telescopic rods (61) disposed on the support frame (1). A third cutter (62) is disposed at the output ends of the two third spring telescopic rods (61). The cutting assembly (6) further includes a fourth cutter (63) disposed on the support frame (1). The fourth cutter (63) corresponds to the position of the third cutter (62).

7. A lithium battery aluminum plastic film according to claim 6, characterized in that, The cutting assembly (6) further includes a fixing member (64) disposed on the support frame (1). Two second ratchet members (65) are respectively rotatably connected to both sides of the fixed connection. The outer rings of the two second ratchet members (65) are both engaged with a third tooth condition (66). The third tooth condition (66) is slidably connected to the support frame (1). A limiting block (67) is disposed on the third tooth condition (66). The limiting block (67) corresponds to the position of the connecting plate (31). The inner rings of the two second ratchet members (65) are respectively rotatably connected to one ends of two transmission rods (68). The other ends of the two transmission rods (68) are respectively rotatably connected to two fixing blocks (69). Both of the two fixing blocks (69) are connected to the third cutter (62).

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