Lithium battery film coating device

Abstract

The utility model relates to the technical field of battery production, in particular to a lithium battery coating device which comprises a rack, a film pulling mechanism, a pushing mechanism, a rolling mechanism, a pulling mechanism and a cutting mechanism are arranged on the rack, the film pulling mechanism is used for conveying a film material and unfolding the film material, and the pushing mechanism and the pulling mechanism are located on the two opposite sides of the unfolded film material correspondingly; the material pushing mechanism is used for bearing a battery and pushing the battery to the direction of a film material to enable the battery to press the film material into a U-shaped bend, the rolling mechanism is used for receiving the battery and the film material pushed by the material pushing mechanism and pressing the film material on the battery, and the cutting mechanism is located between the material pushing mechanism and the rolling mechanism and used for cutting off the film material to enable the film material to be matched with the battery in size after being bent. The material pulling mechanism is located on the side, away from the material pushing mechanism, of the rolling mechanism and used for continuously pulling the battery entering the rolling mechanism in the pushing direction of the material pushing mechanism so that the film material can be completely attached to the battery, manual operation is replaced by a machine, the battery film wrapping efficiency is high, and the film wrapping quality is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, and more particularly, it relates to a lithium battery film coating device. BACKGROUND

[0002] The lithium battery film coating process is an important link in the lithium battery manufacturing process, and the main purpose is to protect the internal cell structure of the battery, ensure the safety, stability and service life of the battery. The battery film coating can not only prevent the battery from being damaged by external physical damage, but also play the role of heat insulation, electrical insulation and sealing required by the battery management system (BMS).

[0003] The lithium battery film coating is generally taken as the top surface with the injection port, the opposite surface as the bottom surface, and the opposite two side surfaces in the thickness direction of the lithium battery as the left and right large surfaces. In the film coating process, the film material is cut into a size that meets the requirements by manual operation, and then the film material is bent and attached to the battery by manual operation. Specifically, the film material is bent in a U shape and attached to the bottom surface and the left and right large surfaces of the battery.

[0004] The manual film coating has the following disadvantages: the manual film coating is low in efficiency, especially in large-scale production, manual operation not only takes a long time, but also it is difficult to ensure the uniformity of the film coating quality of each battery. This low-efficiency and high-cost production method limits the production capacity of the lithium battery production line and is difficult to meet the rapidly growing market demand. Manual operation requires high proficiency of the operator, and human errors are prone to occur. Improper operation may cause uneven wrapping of the film material or insecure film coating, thereby affecting the performance and safety of the battery. Especially in large-scale production, manual operation is more likely to cause quality fluctuations, reducing the controllability and stability of the production process. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the problem of low efficiency and uneven wrapping or insecure film coating of the film material caused by manual film coating of the lithium battery in the related art, the present application provides a lithium battery film coating device.

[0006] The application discloses a lithium battery film coating device, which comprises a rack, a film pulling mechanism, a material pushing mechanism, a roller pressing mechanism, a material pulling mechanism and a cutting mechanism arranged on the rack, wherein the film pulling mechanism is used for conveying film materials and unfolding the film materials; the material pushing mechanism and the material pulling mechanism are respectively arranged on opposite sides of the unfolded film materials; the material pushing mechanism is used for carrying a battery and pushing the battery to the direction of the film materials so that the battery bends the film materials into a U shape; the roller pressing mechanism is used for receiving the battery and the film materials pushed by the material pushing mechanism and pressing the film materials on the battery; the cutting mechanism is arranged between the material pushing mechanism and the roller pressing mechanism and used for cutting the film materials so that the size of the bent film materials is adapted to the battery; and the material pulling mechanism is arranged on the side of the roller pressing mechanism away from the material pushing mechanism and used for pulling the battery entering the roller pressing mechanism to the direction pushed by the material pushing mechanism so that the film materials are completely attached to the battery.

[0007] Preferably, the film pulling mechanism comprises a pay-off roller and a first linear module; the pay-off roller is rotationally connected with the rack and used for supporting the pay-off of a film material roll; and the first linear module is arranged below the pay-off roller and vertically arranged.

[0008] Preferably, the cutting mechanism comprises a first air cylinder, a second air cylinder, a mounting frame, a third air cylinder, a second linear module and a cutter; the first air cylinder is fixed on the rack and vertically arranged between the first linear module and the pay-off roller; the extension shaft of the first air cylinder is arranged downward and provided with a mounting plate; the bottom surface of the mounting plate is provided with a protrusion; the second air cylinder is fixed on the bottom surface of the mounting plate and the extension shaft of the second air cylinder is arranged towards the protrusion and provided with a pressing block; the first through hole is arranged between the mounting plate, the protrusion and the pressing block and used for the film materials to pass through; the mounting frame is arranged below the mounting plate and fixedly connected with the rack; the mounting frame is provided with a limiting block; the second through hole is arranged in the limiting block and used for the film materials to pass through; the first through hole is aligned with the second through hole; the side wall of the limiting block is provided with a slot communicating with the second through hole; the slot is movably provided with a pressing piece; the third air cylinder is fixed on the mounting frame and connected with the pressing piece and used for driving the pressing piece to move towards the second through hole; the side wall of the limiting block is further provided with a cutter groove extending along the width direction of the film materials above the slot; the cutter groove is communicated with the second through hole; the second linear module is fixed on the mounting frame and connected with the cutter; and the cutter passes through the cutter groove and enters the second through hole.

[0009] Preferably, the pushing mechanism comprises a third linear module, a grabbing seat, and two support rods, the two support rods are arranged in parallel and spaced apart, one end of the two support rods is fixed to the rack, the top surfaces of the two support rods are flush and parallel to the horizontal ground, the third linear module is between the support rods and the first linear module, the third linear module is connected with the grabbing seat for driving the grabbing seat to reciprocate between the battery support frame and the first linear module, a fourth cylinder is arranged on the grabbing seat in a vertical manner, the extension shaft of the fourth cylinder faces upward and is provided with a pressing plate, the pressing plate is between the two support rods and below the support rods, and the distance between the two support rods allows the pressing plate to pass through, side plates are arranged on opposite sides of the grabbing seat, and the distance between the two side plates allows the two support rods to pass through, and the two side plates are connected with a top plate, the top plate is above the pressing plate and higher than the support rods.

[0010] Preferably, the rolling mechanism comprises an upper pressing roller and a lower pressing roller, the upper pressing roller and the lower pressing roller are arranged in a vertical symmetrical manner and are rotatably connected with the rack, the upper pressing roller is above the lower pressing roller, and a passageway matching the thickness of the battery is formed between the upper pressing roller and the lower pressing roller.

[0011] Preferably, the pulling mechanism comprises a fourth linear module and a belt conveyor, the fourth linear module is fixedly connected with the rack, the driving direction of the fourth linear module is parallel to the driving direction of the third linear module, the fourth linear module is connected with the belt conveyor for driving the belt conveyor to move towards or away from the rolling mechanism, the input end of the belt conveyor is located between the upper pressing roller and the lower pressing roller, and the upper conveying surface of the belt conveyor is flush with the top point of the lower pressing roller, the input end of the belt conveyor is provided with a gantry, two vertical rods of the gantry are located on opposite sides of the belt conveyor, the cross beam of the gantry is above the belt conveyor, the cross beam of the gantry is provided with a fifth cylinder, the fifth cylinder is drivingly connected with a lower pressing plate, and the fifth cylinder drives the lower pressing plate to move towards or away from the upper conveying surface of the belt conveyor.

[0012] The beneficial technical effects of the present application are that the pushing mechanism pushes the battery to the film material pulled and expanded by the pulling mechanism, the film material is pressed into a U-shaped bending, and the battery and the film material are pushed into the rolling mechanism for rolling to make the film material adhere to the surface of the battery, then the cutting mechanism cuts the film material to make the size of the film material match the battery, then the pulling mechanism pulls the battery to make the rolling mechanism completely adhere the film material to the battery, the battery is pressed against the film material from the bottom surface on the pushing mechanism, the film material is U-shaped after bending, the left large surface and the right large surface of the battery correspond to the film material, the rolling mechanism is rolled to realize the film material adhering to the left large surface and the right large surface of the battery, and the film material covers the bottom surface of the battery due to the bottom surface of the battery pressing the film material, the machine replaces manual operation, the machine has high foolproofness and strong continuous working ability, the battery film wrapping efficiency is high, and the film wrapping consistency is good, and the problems of uneven film wrapping or unstable film wrapping are less likely to occur. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a structural schematic diagram of a lithium battery film wrapping device according to an embodiment of the present application.

[0014] Figure 2 FIG. 2 is an enlarged view of position A in FIG. 1. Figure 1

[0015] Reference signs: 1, rack; 2, unwinding roller; 3, first linear module; 4, pneumatic clamping jaw; 5, first fixed rotating roller; 6, second fixed rotating roller; 7, movable roller; 8, lifting driving part; 9, sliding rail; 10, sliding block; 11, first air cylinder; 12, second air cylinder; 13, mounting frame; 14, third air cylinder; 15, second linear module; 16, cutter; 17, mounting plate; 18, protruding block; 19, pressing block; 20, limiting block; 21, pressing part; 22, third linear module; 23, grabbing seat; 24, supporting rod; 25, fourth air cylinder; 26, pressing plate; 27, side plate; 28, top plate; 29, upper pressing roller; 30, lower pressing roller; 31, fourth linear module; 32, belt conveyor; 33, gantry; 34, fifth air cylinder; 35, lower pressing plate. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0017] Reference Figure 1 ​The application discloses a lithium battery film coating device which comprises a rack 1, a film pulling mechanism, a material pushing mechanism, a roller pressing mechanism, a material pulling mechanism and a cutting mechanism are arranged on the rack 1, the film pulling mechanism is used for conveying film materials and unfolding the film materials, the material pushing mechanism and the material pulling mechanism are respectively arranged on opposite sides of the unfolded film materials, the material pushing mechanism is used for carrying a battery and pushing the battery to the direction of the film materials, the battery pushes the film materials to form a U-shaped bending, the roller pressing mechanism is used for receiving the battery and the film materials pushed by the material pushing mechanism and pressing the film materials on the battery, the cutting mechanism is arranged between the material pushing mechanism and the roller pressing mechanism and is used for cutting the film materials to make the film materials bend to the size of the battery, and the material pulling mechanism is arranged on the side, away from the material pushing mechanism, of the roller pressing mechanism and is used for pulling the battery entering the roller pressing mechanism to the direction pushed by the material pushing mechanism so that the film materials are completely attached to the battery.

[0018] With reference to Figure 1 Further, the film pulling mechanism comprises a unwinding roller 2 and a first linear module 3, the unwinding roller 2 is rotationally connected with the rack 1, the film material roll is fixed on the unwinding roller 2 to support the unwinding of the film material roll, the first linear module 3 is arranged below the unwinding roller 2 and vertically, the first linear module 3 is driven to be provided with a pneumatic clamp jaw 4 used for clamping or releasing the film materials, the pneumatic clamp jaw 4 is a double-finger thumb cylinder, the two thumbs of the double-finger thumb cylinder are provided with clamp jaws, the two clamp jaws are driven to move towards each other by the double-finger thumb cylinder to clamp the film materials, the two clamp jaws are driven to move away from each other by the double-finger thumb cylinder to release the film materials, the pneumatic clamp jaw 4 is driven to rise by the first linear module 3 to clamp the exposed end of the film material roll, and the pneumatic clamp jaw 4 is driven to descend by the first linear module 3 to pull and unfold the film materials.

[0019] With reference to Figure 1 and Figure 2The film drawing mechanism further comprises a first fixed rotating roller 5, a second fixed rotating roller 6, a movable roller 7 and a lifting driving element 8. The rack 1 is provided with a vertical sliding rail 9. A sliding block 10 is slidingly arranged on the sliding rail 9. The movable roller 7 is rotatably arranged on the sliding block 10. The lifting driving element 8 is fixed to the rack 1 and connected with the sliding block 10 for driving the sliding block 10 to slide along the length direction of the sliding rail 9. The unwinding roller 2 is located at one side of the sliding rail 9. The first fixed rotating roller 5 is located at the other side of the sliding rail 9 and at the position of the alignment pneumatic clamp jaw 4. The number of the second fixed rotating rollers 6 is two. One of the second fixed rotating rollers 6 is located between the sliding rail 9 and the unwinding roller 2 and is fixedly connected with the rack 1. The other second fixed rotating roller 6 is located between the first fixed rotating roller 5 and the sliding rail 9 and is rotatably connected with the rack 1. The two second fixed rotating rollers 6 are symmetrically arranged with the sliding rail 9 as the center of symmetry and are located above the unwinding roller 2 and the first fixed rotating roller 5. The film material roll supported by the unwinding roller 2 is drawn and expanded through the top point of the second fixed rotating roller 6 close to the unwinding roller 2, then downward through the bottom point of the movable roller 7, then upward through the top point of the other second fixed rotating roller 6, and then closely adheres to one side of the first fixed rotating roller 5. When the film material is clamped by the pneumatic clamp jaw 4, the movable roller 7 is driven to descend by the lifting driving element 8, and the film material is supported by the first fixed roller and the second fixed roller, so that the film material is tensioned, the stroke of the film material expansion is controlled, the size of the film material is accurate when the film material is cut by the cutting mechanism, and the lifting driving element 8 is preferably a pneumatic cylinder.

[0020] With reference to Figure 1 and Figure 2, cutting mechanism includes first cylinder 11, second cylinder 12, mounting bracket 13, third cylinder 14, second linear module 15, cutting knife 16, first cylinder 11 is fixed on the rack 1 and is between the first linear module 3 and the unwinding roller 2 and is vertically arranged, the telescopic shaft of the first cylinder 11 is arranged downward and the mounting plate 17 is arranged on it, the protruding block 18 is protruded on the bottom surface of the mounting plate 17, the second cylinder 12 is transversely fixed on the bottom surface of the mounting plate 17, the telescopic shaft of the second cylinder 12 is towards the protruding block 18 and the pressing block 19 is arranged on it, the pressing block 19 is driven by the second cylinder 12 to move towards the protruding block 18 to realize the pressing of the film material on the protruding block 18 and the fixing of the film material, the first perforation is arranged between the mounting plate 17 and the protruding block 18 and the pressing block 19, the first perforation is aligned with the pneumatic clamping jaw 4 and the first fixed rotating roller 5, the film material is vertically passed through the first perforation, the mounting bracket 13 is below the mounting plate 17 and is fixedly connected with the rack 1, the limiting block 20 is arranged on the mounting bracket 13, the second perforation is arranged on the limiting block 20, the first perforation is aligned with the second perforation, the film material is vertically passed through the second perforation, the chain second perforation is arranged on the sidewall of the limiting block 20, the pressing piece 21 is movably arranged in the slot, the third cylinder 14 is fixed on the mounting bracket 13 and is connected with the pressing piece 21, the pressing piece 21 is driven by the third cylinder 14 to move towards the second perforation to realize the pressing of the film material on the inner wall of the second perforation, the cutting knife groove is arranged on the upper side of the sidewall of the limiting block 20 and the slot, the cutting knife groove is communicated with the second perforation, the second linear module 15 is transversely fixed on the mounting bracket 13 and is connected with the cutting knife 16, the cutting knife 16 is arranged in the second perforation through the cutting knife groove, the cutting knife 16 is driven by the second linear module 15 to realize the cutting of the film material along the width direction of the film material, the pressing piece 21 is driven by the third cylinder 14 to move away from the second perforation to realize the release of the fixing of the film material, the mounting plate 17 is driven by the first cylinder 11 to descend to drive the second cylinder 12 to descend, since the film material is clamped by the pressing block 19 and the protruding block 18, the film material is driven to descend and pass through the lower side of the second perforation to realize the clamping of the pneumatic clamping jaw 4 again.

[0021] Referring to Figure 1, further, the pushing mechanism comprises a third linear module 22, a grabbing seat 23, and two support rods 24, the two support rods 24 are arranged in parallel and spaced apart, one end of the two support rods 24 is fixed to the rack 1, the top surfaces of the two support rods 24 are flush and parallel to the horizontal ground, the third linear module 22 is between the support rods 24 and the first linear module 3, the third linear module 22 is connected with the grabbing seat 23 for driving the grabbing seat 23 to reciprocate between the battery support frame and the first linear module 3, a fourth cylinder 25 in a vertical direction is arranged on the grabbing seat 23, the fourth cylinder 25 has an upward extending shaft, a pressing plate 26 is arranged on the fourth cylinder 25, the pressing plate 26 is between the two support rods 24 and below the support rods 24, the distance between the two support rods 24 is designed to allow the pressing plate 26 to pass through, side plates 27 are arranged on opposite sides of the grabbing seat 23, the distance between the two side plates 27 is designed to allow the two support rods 24 to pass through, and the two side plates 27 are connected with a top plate 28, the top plate 28 is above the pressing plate 26 and higher than the support rods 24, an external mechanical hand places the battery on the fixed position on the top surface of the two support rods 24, the bottom surface of the battery faces the stretched film, and the left and right large surfaces of the battery are parallel to the horizontal ground, the third linear module 22 drives the grabbing seat 23 to move towards the support rods 24, the grabbing seat 23 moves below the two support rods 24, and the pressing plate 26 is aligned with the battery, the fourth cylinder 25 drives the pressing plate 26 to rise, the pressing plate 26 passes through the two support rods 24 to lift the battery, and the battery is fixed by the pressing plate 26 and the top plate 28, the third linear module 22 drives the grabbing seat 23 to move towards the stretched film, the bottom surface of the battery contacts the film, and the film is pressed into a U-shaped bend.

[0022] With reference to Figure 1 , further, the rolling mechanism comprises an upper roller 29 and a lower roller 30, the upper roller 29 and the lower roller 30 are arranged in a vertical symmetry and are rotationally connected with the rack 1, the upper roller 29 is above the lower roller 30, and a passageway matching the thickness of the battery is formed between the upper roller 29 and the lower roller 30, the passageway is aligned with the battery clamped by the pressing plate 26 and the top plate 28, the third linear module 22 drives the grabbing seat 23 to move towards the stretched film, the film is pressed into a U-shaped bend and then enters the passageway, and the opposite surfaces of the film are rolled by the upper roller 29 and the lower roller 30 respectively, so that the film is attached to the right and left large surfaces of the battery.

[0023] With reference to Figure 1Further, the pulling mechanism comprises a fourth linear module 31, a belt conveyor 32, the fourth linear module 31 is fixedly connected with the rack 1, and the driving direction of the fourth linear module 31 is parallel to the driving direction of the third linear module 22, the fourth linear module 31 is connected with the belt conveyor 32 for driving the belt conveyor 32 to move towards or away from the rolling mechanism, the input end of the belt conveyor 32 is positioned between the upper pressing roller 29 and the lower pressing roller 30, and the upper conveying surface of the belt conveyor 32 is flush with the vertex of the lower pressing roller 30, the input end of the belt conveyor 32 is provided with a portal frame 33, the two vertical rods of the portal frame 33 are located on the opposite sides of the belt conveyor 32, the cross beam of the portal frame 33 is located above the belt conveyor 32, the cross beam of the portal frame 33 is provided with a fifth cylinder 34, the fifth cylinder 34 is drivingly connected with a lower pressing plate 35, the fifth cylinder 34 drives the lower pressing plate 35 to move towards or away from the upper conveying surface of the belt conveyor 32, after the battery is pushed into the passageway formed by the upper pressing roller 29 and the lower pressing roller 30 by the pushing mechanism, the input end of the belt conveyor 32 is driven by the fourth linear module 31 to move close to the lower pressing roller 30, so that the battery falls onto the upper conveying surface of the belt conveyor 32 and is positioned with the lower pressing plate 35, the lower pressing plate 35 is driven by the fifth cylinder 34 to move towards the upper conveying surface, so as to press the battery tightly to the upper conveying surface to clamp and fix the battery, the belt conveyor 32 is driven by the fourth linear module 31 to move away from the lower pressing roller 30, so as to pull the battery to continue to move towards the direction in which the pushing mechanism pushes the battery, so that the battery still moves after the pushing mechanism releases the battery, and the film material continues to be attached to the battery, thereby realizing complete attachment of the film material to the battery.

[0024] The implementation principle of the lithium battery film coating device is that the film material is prepared by the film pulling mechanism, specifically, the film material roll is fixed on the unwinding roller 2, the film material roll supported by the unwinding roller 2 is pulled and unwound to pass through the vertex of the second fixed roller 6 close to the unwinding roller 2, then is pulled and unwound downward to pass through the bottom point of the movable roller 7, then is pulled and unwound upward to pass through the vertex of the other second fixed roller 6, then is attached to one side of the first fixed roller 5, then the film material is pulled and unwound to pass through the first and second perforations, then the film material is clamped by the pneumatic gripper 4 and the pneumatic gripper 4 is driven by the first linear module 3 to descend and pull the film material, and the film material is pulled and unwound to a suitable position, which refers to that the length of the exposed end of the film material to the cutter 16 matches the width of the bottom surface of the battery plus the widths of the left large surface and the right large surface.

[0025] The battery is prepared, and the battery is accurately placed on the fixed position positioned by the two supporting rods 24 by an external mechanical hand, the battery is supported by the two supporting rods 24, and the battery is oriented with the bottom surface facing the film pulling mechanism and the right large surface and the left large surface being parallel to the horizontal ground, the right large surface is on the upper side, and the left large surface is on the lower side.

[0026] After the battery is prepared, the third linear module 22 is driven to move the grabbing seat 23 to the direction of the supporting rod 24, so that the grabbing seat 23 moves to the lower side of the two supporting rods 24 and abuts against the pressing plate 26 to position the battery, the fourth cylinder 25 is driven to move the pressing plate 26 upwards, so that the pressing plate 26 passes through the two supporting rods 24 to lift the battery and cooperate with the top plate 28 to press and fix the battery, and one half of the battery is suspended, the third linear module 22 is driven to move the grabbing seat 23 to the direction of the stretched film material, so that the bottom surface of the battery contacts the film material, the film material is bent in a U shape along with the movement of the battery, the first linear module 3 is driven to move the pneumatic clamp jaw 4 upwards along with the movement of the battery, so that the film material continuously approaches the left large surface of the battery, along with the movement of the battery, the film material is continuously stretched to continuously approach the right large surface of the battery, the battery is pushed into the passageway formed by the upper pressing roller 29 and the lower pressing roller 30, the opposite two surfaces of the film material are pressed by the upper pressing roller 29 and the lower pressing roller 30 respectively, so that the film material is attached to the right large surface and the left large surface of the battery, after the battery enters half of the passageway, the fourth linear module 31 is driven to move the input end of the belt conveyor 32 to be close to the lower pressing roller 30, so that the battery falls onto the upper conveying surface of the belt conveyor 32 and is positioned against the lower pressing plate 35, the fifth cylinder 34 is driven to move the lower pressing plate 35 to be close to the upper conveying surface, so that the battery is pressed onto the upper conveying surface to be clamped and fixed, along with the clamping and fixing of the battery by the lower pressing plate 35 and the belt conveyor 32, the fourth cylinder 25 is driven to move the pressing plate 26 downwards to release the clamping and fixing of the battery, and the grabbing seat 23 is driven by the third linear module 22 to move to the direction of the supporting rod 24, so that the grabbing seat 23 grabs another battery for preparation.

[0027] After the battery is clamped and fixed by the lower pressing plate 35 and the belt conveyor 32, the third cylinder 14 is driven to move the pressing piece 21 to the direction of the second perforation, so that the pressing piece 21 presses and fixes the film material to the inner wall of the second perforation, then the second linear module 15 is driven to cut the film material along the width direction of the film material by the cutter 16, then the fourth linear module 31 is driven to move the belt conveyor 32 away from the lower pressing roller 30, so that the battery is pulled to move in the direction of the pushing mechanism, so that the battery still moves after the pushing mechanism releases the battery, so that the film material is continuously attached to the battery, so that the film material is completely attached to the battery.

[0028] After the film material is cut, the third cylinder 14 is driven to move the pressing piece 21 away from the second perforation, so that the fixing of the film material is released, the first cylinder 11 is driven to move the mounting plate 17 downwards to drive the second cylinder 12 to move downwards, since the film material is clamped by the pressing block 19 and the convex block 18, so that the film material is driven to move downwards to pass through the lower side of the second perforation, so that the pneumatic clamp jaw 4 clamps the film material again, so that the film material is prepared again to cope with the next battery to be wrapped.

[0029] The application is operated by machine instead of manual operation, the machine has high foolproofness and strong continuous working capability, so that the battery package film efficiency is high and the package film consistency is good, and the problems of uneven film wrapping or unstable package film are not prone to occur.

[0030] Although embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the foregoing embodiment, and that various changes in the form and details thereof can be made by those skilled in the art without departing from the spirit and scope of the application, which is defined by the following claims and their equivalents.

Claims

1. A lithium battery coating apparatus, characterized by: The application relates to a battery film wrapping machine, which comprises a rack, a film pulling mechanism, a material pushing mechanism, a roller pressing mechanism, a material pulling mechanism and a cutting mechanism, wherein the film pulling mechanism is used for conveying film materials and unfolding the film materials; the material pushing mechanism and the material pulling mechanism are respectively arranged on opposite sides of the unfolded film materials; the material pushing mechanism is used for carrying batteries and pushing the batteries to the direction of the film materials so that the batteries press the film materials into U-shaped bending; the roller pressing mechanism is used for receiving the batteries and the film materials pushed by the material pushing mechanism and pressing the film materials on the batteries; the cutting mechanism is arranged between the material pushing mechanism and the roller pressing mechanism and is used for cutting the film materials so that the size of the bent film materials is adapted to the batteries; and the material pulling mechanism is arranged on the side, away from the material pushing mechanism, of the roller pressing mechanism and is used for pulling the batteries entering the roller pressing mechanism to the direction in which the material pushing mechanism pushes so that the film materials are completely attached to the batteries.

2. The lithium battery coating device of claim 1, wherein: The film pulling mechanism comprises a pay-off roller and a first linear module, the pay-off roller is rotationally connected with the rack and is used for supporting the pay-off of a film material roll, and the first linear module is arranged below the pay-off roller and is arranged vertically, and the first linear module is driven to be provided with pneumatic clamping jaws used for clamping or releasing the film materials.

3. The lithium battery coating device of claim 2, wherein: The cutting mechanism comprises a first air cylinder, a second air cylinder, a mounting frame, a third air cylinder, a second linear module and a cutter, the first air cylinder is fixed to the rack and is arranged vertically between the first linear module and the pay-off roller, the extension shaft of the first air cylinder is arranged downward and is provided with a mounting plate, the bottom surface of the mounting plate is provided with a protrusion, the second air cylinder is fixed to the bottom surface of the mounting plate laterally, the extension shaft of the second air cylinder is arranged towards the protrusion and is provided with a pressing block, a first through hole is arranged between the mounting plate, the protrusion and the pressing block and is used for the film materials to pass through, the mounting frame is arranged below the mounting plate and is fixedly connected with the rack, a limiting block is arranged on the mounting frame, a second through hole is arranged in the limiting block and is used for the film materials to pass through, the first through hole is aligned with the second through hole, a slot is arranged in the side wall of the limiting block and is communicated with the second through hole, a pressing piece is movably arranged in the slot, the third air cylinder is fixed to the mounting frame and is connected with the pressing piece and is used for driving the pressing piece to move towards the second through hole, a cutter slot is further arranged in the side wall of the limiting block above the slot and extends along the width direction of the film materials, the cutter slot is communicated with the second through hole, the second linear module is fixed to the mounting frame laterally and is connected with the cutter, and the cutter passes into the second through hole through the cutter slot.

4. The lithium battery coating device of claim 2, wherein: The pushing mechanism comprises a third linear module, a material grabbing seat and support rods, the support rods are two in number, are arranged in a spaced and parallel manner, and one end of each of the two support rods is fixed to the rack, the top surfaces of the two support rods are flush and parallel to the horizontal ground, the third linear module is between the support rods and the first linear module, the third linear module is connected with the material grabbing seat for driving the material grabbing seat to reciprocate between the battery support frame and the first linear module, a fourth cylinder in a vertical direction is arranged on the material grabbing seat, the fourth cylinder has an upward telescopic shaft, a pressing plate is arranged on the telescopic shaft, the pressing plate is between the two support rods and below the support rods, and the distance between the two support rods is designed to allow the pressing plate to pass through, side plates are arranged on opposite sides of the material grabbing seat, the distance between the two side plates is designed to allow the two support rods to pass through, and a top plate is connected to the two side plates, the top plate is above the pressing plate and higher than the support rods.

5. The lithium battery coating device of claim 4, wherein: The rolling mechanism comprises an upper pressing roller and a lower pressing roller, the upper pressing roller and the lower pressing roller are arranged in an upper-lower symmetrical manner and are rotationally connected with the rack, the upper pressing roller is above the lower pressing roller, and a passageway matching the thickness of the battery is formed between the upper pressing roller and the lower pressing roller.

6. The lithium battery coating device of claim 5, wherein: The pulling mechanism comprises a fourth linear module and a belt conveyor, the fourth linear module is fixedly connected with the rack, the driving direction of the fourth linear module is parallel to the driving direction of the third linear module, the fourth linear module is connected with the belt conveyor for driving the belt conveyor to move towards or away from the rolling mechanism, the input end of the belt conveyor is located between the upper pressing roller and the lower pressing roller, the upper conveying surface of the belt conveyor is flush with the top point of the lower pressing roller, a gantry is arranged at the input end of the belt conveyor, two vertical rods of the gantry are located at opposite sides of the belt conveyor, a cross beam of the gantry is above the belt conveyor, a fifth cylinder is arranged on the cross beam of the gantry, a lower pressing plate is driven and connected with the fifth cylinder, and the fifth cylinder drives the lower pressing plate to move towards or away from the upper conveying surface of the belt conveyor.

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