Insulating film pasting device based on lithium ion battery PACK assembly line

Abstract

The embodiment of the utility model relates to the technical field of lithium battery production, and discloses an insulating film pasting device based on a lithium ion battery PACK assembly line. The film pasting device comprises a base; the gun placing disc is arranged at the top of the base; the at least two film pasting mechanisms are arranged at the bottom of the base, and each film pasting mechanism comprises a double-layer film belt unwinding, accumulating and releasing assembly used for unwinding a double-layer film belt; the release paper winding and stacking assembly and the double-layer film tape unwinding and stacking assembly are arranged in parallel, and the release paper winding and stacking assembly is used for winding release paper in the double-layer film tape; the roller passing assembly is arranged between the double-layer film tape unwinding, accumulating and releasing assembly and the release paper winding, accumulating and releasing assembly, and is used for stripping the double-layer film tape into an insulating film and release paper and rolling and guiding the insulating film and the release paper; and the cutter assembly is arranged at the tail end of the roller passing assembly and used for being matched with the surface of the lithium battery PACK to be attached and cut off the insulating film. The film pasting device is simple, the film pasting mechanism is convenient to replace, and the film pasting efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and specifically to an insulating film application device based on a lithium-ion battery PACK assembly line. Background Technology

[0002] Existing lithium battery pack film application devices use a separate film application mechanism. The insulating film is fixed to the mechanism and locked with bolts, then extends to the film application surface via rollers. At the application position, a vacuum suction plate holds the insulating film in place, preventing it from retracting when not in use. However, this separate film application mechanism can only apply one layer of film at a time, and the replacement process is complex, resulting in poor versatility and low application efficiency. Furthermore, the insulating film tension is controlled by a servo motor. Since the insulating film is a flexible material, tension fluctuations during servo motor control can trigger an alarm and shutdown. Utility Model Content

[0003] The purpose of this invention is to provide an insulating film applicator for lithium-ion battery PACK assembly lines, which solves the problem of low applicability of existing applicator mechanisms.

[0004] To achieve the above objectives, this utility model provides an insulating film application device for a lithium-ion battery PACK assembly line, the device comprising:

[0005] Base;

[0006] A gun tray is located on top of the base;

[0007] At least two film application mechanisms are disposed at the bottom of the base, and the film application mechanism includes:

[0008] Double-layer film tape unwinding and unwinding assembly, used for unwinding double-layer film tape;

[0009] A release paper winding and stacking assembly is arranged in parallel with the double-layer film tape winding and stacking assembly, and is used to wind up the release paper in the double-layer film tape;

[0010] The roll-over assembly is disposed between the double-layer film tape unwinding and the release paper rewinding assembly, and is used to peel the double-layer film tape into an insulating film and a release paper, and to roll-guide the insulating film and the release paper.

[0011] A cutter assembly, located at the end of the roller assembly, is used to attach and cut the insulating film onto the surface of the lithium battery pack.

[0012] Optionally, the bilayer film tape unwinding and convolution assembly includes:

[0013] Mounting plate;

[0014] A hand-operated expansion shaft is disposed through the mounting plate and is used to tighten the double-layer film strip;

[0015] The initial pressure roller, located on the mounting plate, is used to fix the end of the double-layer film strip.

[0016] Optionally, the roller assembly includes:

[0017] The first roller section is located at the output end of the double-layer film tape unwinding and unwinding assembly, and is used for roller pressing and guiding the double-layer film tape and detecting film breakage.

[0018] The second roller section, located at the output end of the first roller section, is used to separate the double-layer film tape into an insulating film and a release paper, and to roll and guide the insulating film and the release paper respectively.

[0019] The third roller section, located at the output end of the insulating film in the second roller section, is used to roll and guide the insulating film to cooperate with the cutter assembly to cut the insulating film.

[0020] Optionally, the first roller section includes multiple sets of first rollers, which are rotatably mounted on the mounting plate to wind around the conveying double-layer film belt.

[0021] Optionally, the second roller section includes:

[0022] The first mounting base is rotatably connected to the mounting plate;

[0023] The second roller shaft is rotatably mounted at one end of the first mounting base;

[0024] The separation roller shaft is rotatably mounted at the end of the first mounting base away from the second roller shaft;

[0025] An insulating roller shaft is rotatably mounted on the end of the first mounting base away from the separating roller shaft;

[0026] The release roller is rotatably mounted on the mounting plate and located on the side of the release roller away from the insulating roller.

[0027] Optionally, the third roller section includes:

[0028] A first driving cylinder, one end of which is connected to the mounting plate, and the other end of which is connected to the first mounting base;

[0029] The initial pressure roller shaft is located at the output end of the insulating roller shaft.

[0030] Optionally, the cutter assembly includes:

[0031] The second mounting base is fixedly connected to the mounting plate;

[0032] The second drive cylinder is connected to the second mounting base;

[0033] The cutter is connected to the output end of the second drive cylinder;

[0034] The secondary pressure roller shaft is located at the bottom of the second mounting base and is used to cooperate with the primary pressure roller to roll the insulating film.

[0035] Optionally, the first roller section further includes a first sensor, which is disposed on the first roller shaft and is used to detect whether the double-layer film belt is broken;

[0036] The cutter assembly also includes a second sensor, which is mounted on the second drive cylinder, for detecting whether the cutter is extended or retracted.

[0037] Optionally, the film application mechanism further includes a brushless motor for driving the release paper winding and stacking assembly to rotate and wind up.

[0038] Through the above technical solution, this utility model provides an insulating film applying device for a lithium-ion battery PACK assembly line. It features a quick-change film-applying mechanism via a gun-changing disc, which applies film to the lithium-ion battery PACK. During operation, the double-layer film tape is released from the double-layer film tape unwinding assembly, peeled off into insulating film and release paper by a roller assembly, and then recovered by a release paper winding assembly. The insulating film is guided flat by rollers and applied to the battery surface, while a cutter simultaneously trims the edges. The dual film-applying mechanisms operate alternately, with the gun-changing disc switching stations for continuous material replenishment, and an accumulation-type tension mechanism maintaining film tape stability. This film-applying mechanism achieves bubble-free application and improves production efficiency, offering greater reliability than traditional servo control. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a schematic diagram of a film-applying device according to one embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of a film-applying device according to one embodiment of the present invention;

[0042] Figure 3 This is a front view of a film-applying device according to one embodiment of the present invention;

[0043] Figure 4This is a schematic diagram of a partial structure of a film-applying mechanism according to one embodiment of the present invention;

[0044] Figure 5 This is a side view of a film-applying device according to one embodiment of the present invention;

[0045] Figure 6 This is a rear view of a film-applying device according to one embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures

[0047] 1. Base 2. Gun mounting plate

[0048] 3. Film application mechanism 31. Double-layer film belt unwinding and winding assembly

[0049] 32. Release paper winding and stacking assembly; 33. Roller assembly.

[0050] 34. Cutter assembly 331. First roller section

[0051] 332, Second Roll Section; 333, Third Roll Section

[0052] 3321, First mounting base; 3322, Second roller shaft

[0053] 3323, Separating roller shaft; 3324, Insulating roller shaft

[0054] 3325, release roller; 3331, first drive cylinder

[0055] 3332, Initial pressure roller shaft; 341, Second mounting base

[0056] 342. Second drive cylinder; 343. Cutting knife

[0057] 344. Re-pressing roller shaft; 35. Brushless motor Detailed Implementation

[0058] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0059] In this embodiment of the utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positional relationships of the components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0060] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0061] Figure 1 This is a schematic diagram of a film-applying device according to one embodiment of the present invention. Figure 2 This is a schematic diagram of a film-applying device according to one embodiment of the present invention. In this figure, the film-applying device includes a base 1, a gun-releasing plate 2, and at least two film-applying mechanisms 3. The gun-releasing plate 2 is disposed on the top of the base 1, and the at least two film-applying mechanisms 3 are disposed on the bottom of the base 1. Further, for applying film to a lithium battery pack, the film-applying mechanism 3 includes a double-layer film unwinding and rewinding assembly 31, a release paper rewinding and rewinding assembly 32, a roller guide assembly 33, and a cutter assembly 34. The double-layer film unwinding and rewinding assembly 31 is used to unwind the double-layer film strip. The release paper rewinding and rewinding assembly 32 is arranged side-by-side with the double-layer film unwinding and rewinding assembly 31 and is used to rewind the release paper from the double-layer film strip. The roller guide assembly 33 is disposed between the double-layer film unwinding and rewinding assembly 31 and the release paper rewinding and rewinding assembly 32, and is used to peel the double-layer film strip into an insulating film and a release paper, and to roll and guide the insulating film and the release paper. The cutter assembly 34 is located at the end of the roller assembly 33 and is used to attach and cut the insulating film on the surface of the lithium battery pack.

[0062] This film-applying device achieves precise bonding of the insulating film to lithium batteries through dual-station collaborative operation. During operation, the double-layer film tape is released from the double-layer film tape unwinding and accumulation assembly 31, and is peeled off into insulating film and release paper as it passes through the roller assembly 33. The release paper is then continuously recovered by the release paper winding and accumulation assembly 32. Under the roller pressure guidance of the roller assembly 33, the insulating film smoothly covers the surface of the lithium battery PACK. Simultaneously, the cutting assembly 34 completes the edge cutting of the insulating film, achieving high-precision, fully automated film application without bubbles or wrinkles. Compared with existing technologies, this invention's dual film-applying mechanism 3 can work alternately, significantly improving production line efficiency. Furthermore, when the double-layer film tape on the film-applying mechanism 3 is used up, another dual-head film-applying mechanism 3 can be replaced via a gun-changing disc. Manual replenishment of the replaced film-applying mechanism 3 saves manual film replacement time and greatly improves production efficiency. An accumulation-type tension mechanism replaces the existing servo motor-controlled tension, ensuring that the accumulation-type tension mechanism is unaffected by changes in the insulating film tension.

[0063] In this embodiment, the structure of the double-layer film tape unwinding and rewinding assembly 31 can be various that are known to those skilled in the art. In one example of this utility model, to facilitate the replacement of the double-layer film tape, the double-layer film tape unwinding and rewinding assembly 31 includes a mounting plate, a hand-operated expansion shaft, and a primary pressure roller. The hand-operated expansion shaft is disposed through the mounting plate for tightening the double-layer film tape, and the primary pressure roller is disposed on the mounting plate for fixing the end of the double-layer film tape. By using the hand-operated expansion shaft to fix the inner hole of the paper tube of the double-layer film tape, the double-layer film tape can be disassembled and assembled by manually rotating the knob three times. The primary pressure roller fixes the end of the insulating film, replacing the commonly used vacuum adsorption method, increasing equipment stability and reducing costs.

[0064] In this embodiment, the specific structure of the roller assembly 33 can be various types known to those skilled in the art, provided that it satisfies the requirements of separating, rolling, and guiding the double-layer film belt. In one example of this utility model, such as... Figure 3 As shown, the roller assembly 33 may include a first roller section 331, a second roller section 332, and a third roller section 333. The first roller section 331 is located at the output end of the double-layer film tape unwinding and rewinding assembly 31, and is used for roller-guiding the double-layer film tape and detecting film breakage. The second roller section 332 is located at the output end of the first roller section 331, and is used to separate the double-layer film tape into an insulating film and release paper, and to roller-guide the insulating film and release paper respectively. The third roller section 333 is located at the output end of the insulating film in the second roller section 332, and is used for roller-guiding the insulating film to cooperate with the cutter assembly 34 in cutting the insulating film. The roller assembly 33 completes the separation of the double-layer film tape through three-stage roller-guiding: the first roller section 331 guides the double-layer film tape and detects film breakage; the second roller section 332 separates the double-layer film tape into an insulating film and release paper and guides them respectively; and the third roller section 333 cooperates with the cutter assembly 34 to precisely cut the insulating film. The entire process achieves membrane belt separation and guidance through staged roller pressing. The first stage maintains overall conveying, the second stage performs peeling operation, and the third stage cooperates with the cutting process to form a complete separation and processing flow.

[0065] In this embodiment, considering the need for stable conveying of the double-layer film belt, the first roller section 331 includes multiple sets of first roller shafts. These first roller shafts are rotatably mounted on the mounting plate to wind around the conveying double-layer film belt. The number of first roller shafts can be multiple, as known to those skilled in the art, such as 2, 3, or 4. In one example of this invention, for example… Figure 3 As shown, there can be 3.

[0066] In this embodiment, the structure of the second roller section 332 can be of various types known to those skilled in the art, provided that the separation of the double-layer film belt is satisfied. In one example of this utility model, such as... Figure 4As shown, the second roller section 332 includes a first mounting base 3321, a second roller shaft 3322, a separating roller shaft 3323, an insulating roller shaft 3324, and a release roller shaft 3325. The first mounting base 3321 is rotatably connected to a mounting plate. The second roller shaft 3322 is rotatably disposed at one end of the first mounting base 3321. The separating roller shaft 3323 is rotatably disposed at the end of the first mounting base 3321 away from the second roller shaft 3322. The insulating roller shaft 3324 is rotatably disposed at the end of the first mounting base 3321 away from the separating roller shaft 3323. The release roller shaft 3325 is rotatably disposed on the mounting plate and located on the side of the separating roller shaft 3323 away from the insulating roller shaft 3324. When the double-layer film belt passes through the separation roller, the insulating film and release paper of the double-layer film belt are separated and move towards both sides of the separation roller. The release paper is guided by the release roller shaft 3325 to the paper take-up tray of the release paper take-up and collection assembly 32 to collect the release paper. The insulating film is moved to the vicinity of the lithium battery PACK by the insulating roller shaft 3324.

[0067] In this embodiment, the structure of the third roller section 333 can be various that are known to those skilled in the art. In one example of this utility model, the third roller section 333 includes a first driving cylinder 3331 and a first mounting base 3321. One end of the first driving cylinder 3331 is connected to the mounting plate, and the other end of the first driving cylinder 3331 is connected to the first mounting base 3321. The initial pressure roller shaft 3332 is disposed at the output end of the insulating roller shaft 3324. The first driving cylinder 3331 drives the first mounting base 3321 to rotate on the mounting plate, causing the initial pressure roller shaft 3332 and the insulating film to be pressed down onto the surface of the lithium battery pack. One end of the insulating film adheres to the surface of the lithium battery pack. At this time, under the action of external force, the initial pressure roller shaft 3332 runs a specified distance along the length direction of the lithium battery pack, causing the insulating film to be released from the double-layer film tape unwinding and unwinding assembly 31, and pressing the insulating film tightly onto the surface of the lithium battery pack.

[0068] In this embodiment, the structure of the cutter assembly 34 can be various that are known to those skilled in the art. In one example of this utility model, such as... Figure 3 and 5As shown, the cutter assembly 34 includes a second mounting base 341, a second drive cylinder 342, a cutter 343, and a secondary pressure roller shaft 344. The second mounting base 341 is fixedly connected to the mounting plate, the second drive cylinder 342 is connected to the second mounting base 341, the cutter 343 is connected to the output end of the second drive cylinder 342, and the secondary pressure roller shaft 344 is disposed at the bottom of the second mounting base 341 to cooperate with the primary pressure roller shaft 3332 to roll the insulating film. Under the action of external force, the secondary pressure roller shaft 344 moves synchronously with the primary pressure roller shaft 3332 in the horizontal direction to press the insulating film on the surface of the lithium battery PACK. When the film application is completed, the second drive cylinder 342 drives the cutter 343 to extend and cut the insulating film, and the secondary pressure roller shaft 344 moves horizontally towards the primary pressure roller shaft 3332 again under the action of external force to further press the insulating film between the cutter 343 and the primary pressure roller shaft 3332.

[0069] Furthermore, to ensure continuity during the conveying of the double-layer film strip, the first roller section 331 also includes a first sensor, which is mounted on the first roller shaft and used to detect whether the double-layer film strip is broken. The type of first sensor can be various known to those skilled in the art; in one example of this invention, the first sensor is a fan-shaped induction plate. The fan-shaped induction plate detects whether the insulating film is broken; if the insulating film is accidentally broken, an alarm is triggered, ensuring the quality of the film application. In addition, the cutter assembly 34 also includes a second sensor, mounted on the second drive cylinder 342, used to detect whether the cutter 343 is extended or retracted.

[0070] In this embodiment, the method for driving the release paper winding and unwinding assembly 32 to rotate can be various that are known to those skilled in the art. In one example of this utility model, such as... Figure 6 As shown, the film application mechanism 3 also includes a brushless motor 35, which drives the release paper winding and stacking assembly 32 to rotate and wind up, thereby improving the winding efficiency.

[0071] Through the above technical solution, this utility model provides an insulating film applying device for a lithium-ion battery PACK assembly line. It features a quick-change film-applying mechanism via a gun-changing disc, which applies film to the lithium-ion battery PACK. During operation, the double-layer film tape is released from the double-layer film tape unwinding assembly, peeled off into insulating film and release paper by a roller assembly, and then recovered by a release paper winding assembly. The insulating film is guided flat by rollers and applied to the battery surface, while a cutter simultaneously trims the edges. The dual film-applying mechanisms operate alternately, with the gun-changing disc switching stations for continuous material replenishment, and an accumulation-type tension mechanism maintaining film tape stability. This film-applying mechanism achieves bubble-free application and improves production efficiency, offering greater reliability than traditional servo control.

[0072] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations.

[0073] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A lithium ion battery PACK assembly line insulation film pasting device based on, characterized by, The film pasting device comprises: a base; a gun placing disc arranged on the top of the base; at least two film pasting mechanisms arranged on the bottom of the base, the film pasting mechanism comprising: a double-layer film belt unwinding and winding assembly for unwinding a double-layer film belt; a release paper winding and unwinding assembly arranged in parallel with the double-layer film belt unwinding and winding assembly for winding the release paper in the double-layer film belt; a roller assembly arranged between the double-layer film belt unwinding and winding assembly and the release paper winding and unwinding assembly for peeling the double-layer film belt into an insulation film and a release paper and roller-pressing and guiding the insulation film and the release paper; a cutter assembly arranged at the end of the roller assembly for pasting on the surface of a lithium battery cell PACK and cutting off the insulation film.

2. The device according to claim 1, wherein The double-layer film belt unwinding and winding assembly comprises: a mounting plate; a hand expansion shaft arranged through the mounting plate for expanding the double-layer film belt; a primary pressing wheel arranged on the mounting plate for fixing the end of the double-layer film belt.

3. The device according to claim 2, wherein The roller assembly comprises: a first roller part arranged at the output end of the double-layer film belt unwinding and winding assembly for roller-pressing and guiding the double-layer film belt and film breakage detection; a second roller part arranged at the output end of the first roller part for separating the double-layer film belt into the insulation film and the release paper and roller-pressing and guiding the insulation film and the release paper respectively; a third roller part arranged at the output end of the insulation film in the second roller part for roller-pressing and guiding the insulation film to cooperate with the cutter assembly to cut off the insulation film.

4. The device according to claim 3, wherein The first roller part comprises a plurality of first roller shafts rotatably arranged on the mounting plate to convey the double-layer film belt.

5. The device according to claim 4, wherein The second roller part comprises: a first mounting seat rotatably connected with the mounting plate; a second roller shaft rotatably arranged at one end of the first mounting seat; a separation roller shaft rotatably arranged at one end of the first mounting seat away from the second roller shaft; an insulation roller shaft rotatably arranged at one end of the first mounting seat away from the separation roller shaft; a release roller shaft rotatably arranged on the mounting plate and located on the side of the separation roller shaft away from the insulation roller shaft.

6. The device according to claim 5, wherein The third roller part comprises: a first driving air cylinder, one end of which is connected with the mounting plate and the other end of which is connected with the first mounting seat; a primary pressing roller shaft arranged at the output end of the insulation roller shaft.

7. The device according to claim 6, wherein The cutter assembly comprises: a second mounting seat fixedly connected with the mounting plate; a second driving air cylinder connected with the second mounting seat; a cutter connected with the output end of the second driving air cylinder; a secondary pressing roller shaft arranged at the bottom of the second mounting seat for roller-pressing the insulation film in cooperation with the primary pressing roller. 8.The film pasting device according to claim 7, characterized in that, The first roller part further comprises a first sensor arranged on the first roller shaft for detecting whether the double-layer film belt is broken; The cutter assembly further comprises a second sensor arranged on the second driving air cylinder for detecting whether the cutter is pushed out or retracted.

9. The device of claim 1, wherein, The film pasting mechanism further comprises a brushless motor for driving the release paper winding and unwinding assembly to rotate and wind.

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