Air knife for film application, air knife film application mechanism and air knife film application method

Abstract

The air knife for applying film has an air outlet groove extending along its width on the blade lip on the same side where the blade cover and blade body are joined. The blade lip gradually protrudes from both sides towards the center in the width direction, so that the distance between the blade lip and the battery gradually increases from the center to both sides. The air outlet groove gradually narrows from both sides towards the center in the width direction, so that the intensity of the air force blowing from the air outlet groove towards the battery gradually weakens from the center to both sides. The air knife film application mechanism sets the film application air knife on the surface of the battery with an adjustable blade angle. The linear drive module is used to drive the slide to move the film application air knife vertically towards the battery to the preset blade height. The air knife film application method uses the air knife film application mechanism to first lay the insulating film between the film application air knife and the surface of the battery, then make the film application air knife reach the blade height, and introduce compressed air at a preset pressure; then the film application air knife moves relative to the battery to apply the film with air force, which can ensure that the film application does not have defects such as peeling, bubbles, wrinkles, corners, or lifting.

Description

Technical Field

[0001] This invention belongs to the field of battery equipment technology, and particularly relates to a film-applying air knife, an air knife film-applying mechanism, and an air knife film-applying method. Background Technology

[0002] With the liquid injection port facing forward and the top cover facing upward, the square aluminum-cased battery (referred to as the battery) includes six outer surfaces: top, bottom, left large surface, right large surface, front side, and rear side. On the center line of the exposed surface of the top cover of a conventional battery, the cathode column, liquid injection port, explosion-proof window, QR code, and anode column are distributed from front to back. During the manufacturing process, insulating films or insulating sheets need to be attached to the six outer surfaces of the bare aluminum casing of the battery to provide electrical isolation, as well as corrosion protection and decoration.

[0003] Battery screen protector requirements: All six outer surfaces of the battery are covered, leaving only the cathode post, anode post, explosion-proof window, and QR code exposed, except where intentionally left blank; The film tension and film application pressure meet the process requirements; The minimum dimension (minimum creepage distance) of the overlapping area of ​​the insulating film tape (sheet) is ≥4mm, unless intentionally left blank; Film application size accuracy ±1mm; The length and width dimensions were not significantly increased to avoid affecting future battery module assembly. No exposed areas (except where intentionally left blank), no glue residue, bubbles, wrinkles, corners, lifting, scratches, or dirt.

[0004] The prior art patent CN221068603U discloses a coating device, including an air knife unit 70 and a coating unit 90. The air knife unit 70 includes an air knife assembly 71, a bonding drive assembly 72, a support rod 73, an air knife motion drive assembly 74, a third guide rail 80, a third slider 81, and a second fixing structure 76. The third slider 81 can be connected to the air knife assembly 71 through the second fixing structure 76 and the bonding drive assembly 72. The air knife motion drive assembly 74 is connected to the air knife assembly 71 through the bonding drive assembly 72. The air knife motion drive assembly 74 is used to drive the air knife assembly 71 to move along a third direction to the top of the product to be wrapped 2 and enter the wrapping station. The air knife assembly 71 is used to blow the film 3 on the product to be wrapped 2 to move along a third direction to be bonded to the first side (left and right large surfaces) and the second side (front and back sides) of the product to be wrapped 2. The bonding drive assembly 72 is used to drive the air knife assembly 71, including the pressure block 711, to descend along a third direction, pushing the product to be wrapped 2 and causing the film 3 below the product to be wrapped 2 to move along a third direction until it is held by the wrapping unit 90 and bonded to the bottom of the product to be wrapped 2.

[0005] The coating device only involves the air knife assembly 71 blowing the film 3 along a third direction to adhere to the first side (left and right large surfaces) and the second side (front and back sides) of the product 2 to be coated, resulting in defects such as adhesive residue, bubbles, wrinkles, corners, and lifting.

[0006] To address these issues, we developed an air knife for film application, an air knife film application mechanism, and an air knife film application method to solve defects such as adhesive residue, bubbles, wrinkles, corners, and lifting during air knife film application. Summary of the Invention

[0007] The purpose of this invention is to provide a film-applying air knife, an air knife film-applying mechanism, and an air knife film-applying method for use in... An air knife for applying insulating film to batteries includes a blade body and a cover. The cover is fixed to the blade body. A blade lip is formed on the same side where the cover and the blade body are attached. An air outlet groove extending along the width direction is formed on the blade lip. The blade lip gradually protrudes from both sides towards the center in the width direction, so that the distance between the blade lip and the battery gradually increases from the center to both sides. The air outlet groove gradually narrows from both sides towards the center in the width direction, so that the intensity of the air force blowing from the air outlet groove towards the battery gradually weakens from the center to both sides. The air knife is used to be mounted on the surface of the battery. Compressed air is introduced to press the insulating film between the air outlet groove and the surface of the battery onto the surface of the battery using air force.

[0008] Furthermore, the blade body includes a blade body, an air chamber, an air inlet, a blade lip, an air outlet, a blade body cover, and a mounting part; The air chamber is located in the middle of the blade body and has an opening on one large surface of the blade body. The air inlet extends from the air chamber to another large surface of the blade body. The body blade lip is located on one side of the blade body, and the middle of the body blade lip gradually protrudes outward. The air outlet is located on the body blade lip and communicates with the air chamber. The air outlet forms the air outlet after the blade cover is closed onto the blade body. The blade body cover and the mounting part are located on the blade body. The blade body cover is used to close the blade cover onto the blade body, and the mounting part is used to install the film-applying air knife onto an external bracket.

[0009] Furthermore, the knife cover includes a cover body, a knife lip, and a knife cover closing portion. The knife lip is located on one side of the cover body, and the middle of the knife lip gradually protrudes outward. The knife cover closing portion is located on the cover body and penetrates the large surface of the cover body. The knife cover closing portion can close with the knife body closing portion. After closing, the knife lip and the knife lip together form the knife lip, and the air outlet forms the air outlet slot.

[0010] A wind-knife film application mechanism includes a film application frame, a film application slide group, and a wind-knife film application assembly. The wind-knife film application assembly includes a linear drive module, a slide plate, and the aforementioned film application wind knife. The slide rails of the film application slide group are vertically fixed to both sides of the film application frame. The linear drive module is fixed to the top of the film application frame. The slide plate is fixed to the output end of the linear drive module and the slider of the film application slide group. The film application wind knife is mounted under the slide plate with a mounting part, allowing the blade lip to deflect along its length direction, so that the air outlet direction of the air outlet slot is directed towards the surface of the battery on the external material carrier, and the blade angle is adjustable. The portion of the film application frame located below the film application wind knife is hollowed out to form a film application channel. The linear drive module is used to drive the slide plate to move vertically along the slide rails of the film application slide group towards the battery, and to apply film to the surface of the battery located in the film application channel facing the film application wind knife using wind power.

[0011] Furthermore, the air knife film application mechanism includes two air knife film application assemblies, which are mirror-symmetrically arranged at the upper and lower ends of the film application frame and have a common film application channel. The upper and lower linear drive modules are used to drive the upper and lower slide plates, along the upper and lower film application air knives, to vertically approach each other along the slide rail of the film application slide group, so as to simultaneously apply air-powered film to the upper and lower surfaces of the battery located in the film application channel facing the upper and lower surfaces of the upper and lower film application air knives.

[0012] A method for applying film using an air knife, employing the aforementioned air knife film application mechanism, includes the following steps: S1 Preparation: Prepare the insulating film tape with a width wider than the battery width, prepare the air knife with a length of air outlet groove longer than the width of the insulating film tape, and prepare the air knife film application mechanism, external material carrier mechanism and battery to be filmed according to whether single-sided or double-sided film application is required. S2 Fabric: The insulating film tape is laid below the film-applying air knife of the air knife film-applying mechanism and above the surface of the battery at the film-applying distance, film-applying angle and preset film-applying tension. S3 Adjusting the blade: Adjust the blade angle of the film-applying air knife of the air knife film-applying mechanism so that the air outlet direction of the air outlet slot is towards the surface of the battery on the external material carrier mechanism; S4 Film Application: First, the linear drive module drives the slide plate to carry the film application air knife along the slide rail of the film application slide group, vertically approaching the insulating film strip until the preset height of the blade mounting distance is reached; then, compressed air of preset pressure is introduced into the film application air knife; then, the film application air knife moves relative to the battery on the external material loading mechanism, and the surface of the battery facing the film application air knife is applied with air force in the film application channel.

[0013] Furthermore, the fabric tension is 1.5±0.5 kgf, which is proportional to the width of the edge film strip, as determined by process testing.

[0014] Furthermore, the blade angle is 30 to 120°, and the blade angle, the length and width of the air outlet groove determine the shape, length and width of the film-applying line that the film-applying air knife presses the insulating film onto the surface of the battery.

[0015] Furthermore, the preset height of the blade holder distance, the preset blade holder angle, and the preset pressure of the compressed air ensure that the pressure of the film-applying air blowing on the film-applying line meets 15±5Mpa. The pressure of the film-applying air is proportional to the area of ​​the film-applying line, as determined by process testing.

[0016] Furthermore, the distance between the blade lip and the battery gradually increases from the center to both ends, and the intensity of the airflow blowing from the air outlet to the battery gradually weakens from the center to both ends. The film-applying airflow that meets the pressure requirements first reaches a midpoint and then extends continuously to both ends, reliably pressing the insulating film strip onto the surface of the battery from point to line, forming the film-applying line, ensuring that defects such as adhesive peeling, bubbles, and wrinkles will not appear on the film-applying line. As the film-applying air blade moves stably relative to the battery, the film-applying line extends continuously in the height direction of the battery, reliably pressing the insulating film strip onto the surface of the battery from line to surface, forming the film-applying surface, ensuring that defects such as adhesive peeling, bubbles, and wrinkles will not appear on the film-applying surface. Finally, the entire surface of the battery becomes a complete film-applying surface, ensuring that defects such as adhesive peeling, bubbles, wrinkles, corners, and lifting will not appear on the complete film-applying surface.

[0017] Furthermore, the preparation stage and the film-laying stage ensure that some of the insulating film tape extends beyond the complete film-laying surface after film application, allowing it to be subsequently folded and applied to the sides, top, and bottom surfaces of the battery according to process requirements.

[0018] Furthermore, the distance between the film layers is between 1 and 3 mm, and the film layer angle (A1) is between 0 and 3°, to ensure that the film application lines and the film application surface do not detach during the film application process, and to ensure that the insulating film tape does not touch the surface of the battery during the film application process.

[0019] Compared with existing technologies, the advantages of a film-applying air knife, an air knife film-applying mechanism, and an air knife film-applying method are as follows: The blade cover and blade body of the film-applying air knife form a blade lip on the same side. An air outlet groove is opened on the blade lip, which extends along its width direction. The blade lip gradually protrudes from both sides towards the middle in the width direction, so that the distance between the blade lip and the battery gradually increases from the middle to both sides. The air outlet groove gradually narrows from both sides towards the middle in the width direction, so that the strength of the air force blowing from the air outlet groove towards the battery gradually weakens from the middle to both sides. The air knife film application mechanism sets up the film application air knife on the surface of the battery with an adjustable blade angle. The linear drive module is used to drive the slide plate to move vertically towards the battery along the slide rail of the film application slide group to the preset blade distance for film application. The air knife film application method uses an air knife film application mechanism. First, the insulating film is placed below the film application air knife and above the surface of the battery. Then, the film application air knife is positioned at a preset height and compressed air at a preset pressure is introduced. Next, the film application air knife is moved relative to the battery on the external material carrier mechanism. The film is applied to the surface of the battery facing the film application air knife within the film application channel using air force. This method ensures that the film application does not produce defects such as adhesive residue, bubbles, wrinkles, corners, or peeling.

[0020] The film-applying air knife replaces the film-applying pressure roller, allowing for simultaneous film application to both opposite surfaces of the battery. It meets the requirements for both quality and efficiency, achieving the same effect with different technical solutions, demonstrating innovation. Attached Figure Description

[0021] Figure 1 Diagram of the air knife structure for film application; Figure 2 Exploded view of the air knife used for applying the film; Figure 3 Structural diagram of the air knife film application mechanism; Figure 4 Schematic diagram of wind direction and angle to battery surface; Figure 5 Diagram of the film application line; Figure 6 Flowchart of air-knife film application method.

[0022] Explanation of reference numerals in the attached figures: D1, film fabrication distance; D2, knife holder distance; A1, film fabrication angle; A2, knife holder angle; 10. Battery; L2. Battery width; 20. Insulating film tape; 20A. Insulating film tape during film application; 20B. Film application surface; 20C. Film application line; L3. Width of insulating film tape; 100. Film application air knife; 110. Blade body; 111. Blade blade; 112. Air chamber; 113. Air inlet; 114. Blade lip; 115. Air outlet; 116. Blade cover; 117. Mounting part; 120. Knife cover; 121. Cover body; 122. Knife lip; 123. Knife cover fitting part; 130. Blade lip; 140. Air outlet duct; L1. Length of air outlet duct; 1000. Air knife film application mechanism; 200. Film application frame; 1000A, Air Knife Film Applying Assembly; 300, Film Applying Slide Group; 400, Linear Drive Module; 500, Slide Board; 700, Film application channel. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, used to refer to a fixed connection, as well as a detachable connection, or an integral connection; used to refer to a direct connection, as well as an indirect connection through an intermediate medium, and used to refer to the internal communication of two components. For those skilled in the art, the specific meaning of the terms in this invention is understood according to the specific circumstances.

[0025] See Figures 1-6 This embodiment provides a film-applying air knife 100, an air knife film-applying mechanism 1000, and an air knife film-applying method for applying a film to a battery 10 using air force.

[0026] like Figure 1 As shown, the film-applying air knife 100 of this embodiment is used for applying film to the battery 10 using airflow. It includes a blade body 110 and a blade cover 120. The blade cover 120 is fixedly attached to the blade body 110. A blade lip 130 is formed on the same side where the blade cover 120 and the blade body 110 are attached. An air outlet groove 140 extending along its width direction is provided on the blade lip 130. The blade lip 130 gradually protrudes from both sides towards the middle in the width direction, so that the distance between the blade lip 130 and the battery 10 gradually increases from the middle to both sides. The air outlet groove 140 gradually narrows from both sides towards the middle in the width direction, so that the intensity of the airflow blowing from the air outlet groove 140 towards the battery 10 gradually weakens from the middle to both sides. The film-applying air knife 100 is used to be mounted on the surface of the battery 10. Compressed air is introduced to press the insulating film strip 20 located between the air outlet groove 140 and the surface of the battery 10 onto the surface of the battery 10 using airflow.

[0027] Further, see Figure 2 The blade body 110 includes a blade body 111, an air chamber 112, an air inlet 113, a blade lip 114, an air outlet 115, a blade body cover 116, and a mounting part 117. The air chamber 112 is located in the middle of the blade 111 and has an opening on one large surface of the blade 111. The air inlet 113 extends from the air chamber 112 to the other large surface of the blade 111. The body blade lip 114 is located on one side of the blade 111 and protrudes outward from the middle. The air outlet 115 is located on the body blade lip 114 and communicates with the air chamber 112. The air outlet 115 forms an air outlet 140 after the blade cover 120 is closed onto the blade 110. The blade cover part 116 and the mounting part 117 are located on the blade 111. The blade cover part 116 is used to close the blade cover 120 onto the blade 110, and the mounting part 117 is used to install the film-applying air knife 100 onto the external bracket.

[0028] Furthermore, see Figure 2 The knife cover 120 includes a cover body 121, a knife lip 122, and a knife cover closing part 123. The knife lip 122 is located on one side of the cover body 121, and the middle part of the knife lip 122 gradually protrudes outward. The knife cover closing part 123 is located on the cover body 121 and penetrates the large surface of the cover body 121. The knife cover closing part 123 can close with the knife body closing part 116. After closing, the knife lip 122 and the knife lip 114 form a knife lip 130, and the air outlet 115 forms an air outlet 140.

[0029] See Figure 3 The air knife film application mechanism 1000 includes a film application frame 200, a film application slide 300, and an air knife film application assembly (1000A). The air knife film application assembly (1000A) includes a linear drive module 400, a slide plate 500, and the aforementioned film application air knife 100. The slide rails of the film application slide 300 are vertically fixed to both sides of the film application frame 200. The linear drive module 400 is fixed to the top of the film application frame 200. The slide plate 500 is fixed to the output end of the linear drive module 400 and the slider of the film application slide 300. The film application air knife 100 is mounted on a mounting section 117. The blade lip 130, positioned under the slide plate 500, can be deflected along its length to adjust the blade angle (A2) so that the air outlet 140 faces the surface of the battery 10 on the external material carrier mechanism. The film-applying frame 200 is partially hollowed out below the film-applying air knife 100 to form a film-applying channel 700. The linear drive module 400 drives the slide plate 500 to move vertically along the slide rail of the film-applying slide block 300 towards the battery 10, and applies wind-powered film to the surface of the battery 10 facing the film-applying air knife 100 located in the film-applying channel 700.

[0030] Further, see Figure 3The air knife film application mechanism 1000 of this embodiment includes two air knife film application assemblies (1000A). The two air knife film application assemblies (1000A) are mirror-symmetrically arranged at the upper and lower ends of the film application frame 200 and have a common film application channel 700. The upper and lower linear drive modules 400 are used to drive the upper and lower slide plates 500 to bring the upper and lower film application air knives 100 vertically closer along the slide rail of the film application slide group 300, so as to simultaneously apply air-powered film to the upper and lower surfaces of the battery 10 located in the film application channel 700 facing the upper and lower film application air knives 100.

[0031] The air knife film application method of this embodiment, using the aforementioned air knife film application mechanism 1000, includes the following steps: S1. Preparation: See below Figure 5 Prepare insulating film strip 20 with the width L3 of insulating film strip being wider than the width L2 of battery; prepare air knife 100 with the length L1 of air outlet being longer than the width L3 of insulating film strip; prepare air knife film application mechanism 1000, external material carrier mechanism and battery 10 to be filmed according to whether single-sided or double-sided film application is required. S2, Fabric membrane: See [link] Figure 4 The insulating film strip 20 is placed below the film-applying air knife 100 of the air knife film-applying mechanism 1000 and above the surface of the battery 10 with a film-applying distance D1, a film-applying angle A1 and a preset film-applying tension. S3, Tool Adjustment: See below Figure 4 Adjust the blade angle A2 of the film-applying air knife 100 of the air knife film-applying mechanism 1000 so that the air outlet direction of the air outlet 140 is directed toward the surface of the battery 10 on the external material carrier mechanism. S4. Applying a screen protector: See below Figure 4 , Figure 5 First, the linear drive module 400 drives the slide plate 500 to carry the film-applying air knife 100 vertically along the slide rail of the film-applying slide group 300 towards the insulating film strip 20 until the preset height of the knife-mounting distance D2 is reached; then, compressed air of preset pressure is introduced into the film-applying air knife 100; then, the film-applying air knife 100 is moved relative to the battery 10 on the external material carrier mechanism, and the surface of the battery 10 facing the film-applying air knife 100 is applied with air force in the film-applying channel 700.

[0032] Furthermore, the fabric tension is 1.5±0.5 kgf, which is proportional to the width of the edge film (L3), as determined by process testing.

[0033] Furthermore, the blade angle A2 is 30 to 120°. The blade angle A2 and the length and width of the air outlet groove determine the shape, length and width of the film-applying line 20C on which the film-applying air knife 100 presses the insulating film tape 20 onto the surface of the battery 10.

[0034] Furthermore, the preset height of the blade holder distance D2, the blade holder angle A2, and the preset pressure of the compressed air ensure that the pressure of the air blowing on the film application line 20C meets 15±5Mpa. The pressure of the air application is proportional to the area of ​​the film application line 20C, as determined by process testing.

[0035] Furthermore, the distance between the blade 130 and the battery 10 gradually increases from the middle to both ends, and the intensity of the airflow blowing from the air outlet 140 towards the battery 10 gradually weakens from the middle to both ends. The film-applying airflow that meets the pressure requirements first reaches a midpoint and then extends continuously to both ends, reliably pressing the insulating film strip 20 onto the surface of the battery 10 from point to line, forming a film-applying line 20C, ensuring that defects such as adhesive peeling, bubbles, and wrinkles will not appear on the film-applying line 20C. As the film-applying air blade 100 moves stably relative to the battery 10, the film-applying line 20C extends continuously in the height direction of the battery 10, reliably pressing the insulating film strip 20 onto the surface of the battery 10 from line to surface, obtaining a film-applying surface 20B, ensuring that defects such as adhesive peeling, bubbles, and wrinkles will not appear on the film-applying surface 20B. Finally, the entire surface of the battery 10 becomes a complete film-applying surface 20B, ensuring that defects such as adhesive peeling, bubbles, wrinkles, corners, and lifting will not appear on the complete film-applying surface 20B.

[0036] Furthermore, the preparation and film-laying stages allow the insulating film tape 20 to retain some extension on the complete film-laying surface 20B after film application, for subsequent folding and application to the sides, top, and bottom surfaces of the battery 10 according to process requirements.

[0037] Furthermore, the distance between the film and D1 is between 1 and 3 mm, and the film angle A1 is between 0 and 3°, to ensure that the film application line 20C and the film application surface 20B do not delaminate during the film application process, and to ensure that the insulating film tape 20A does not touch the surface of the battery 10 during the film application process.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A film-applying air knife (100) for applying film to a battery (10) using airflow, comprising a knife body (110) and a knife cover (120), wherein the knife cover (120) is fixedly fitted onto the knife body (110), characterized in that, The blade cover (120) and the blade body (110) are closed on the same side to form a blade lip (130). An air outlet groove (140) extending along its width direction is provided on the blade lip (130). The blade lip (130) gradually protrudes from both sides to the middle in the width direction, so that the distance between the blade lip (130) and the battery (10) gradually increases from the middle to both sides. The air outlet groove (140) gradually narrows from both sides to the middle in the width direction, so that the strength of the wind blowing from the air outlet groove (140) to the battery (10) gradually weakens from the middle to both sides. The film-applying air knife (100) is used to be mounted on the surface of the battery (10). Compressed air is introduced to press the insulating film strip (20) located between the air outlet groove (140) and the surface of the battery (10) onto the surface of the battery (10) by air force.

2. The film-applying air knife (100) according to claim 1, characterized in that, The blade body (110) includes a blade body (111), an air chamber (112), an air inlet (113), a blade lip (114), an air outlet (115), a blade body cover (116), and a mounting part (117). The air chamber (112) is located in the middle of the blade (111) and has an opening on one large surface of the blade (111). The air inlet (113) extends from the air chamber (112) to another large surface of the blade (111). The body blade lip (114) is located on one side of the blade (111), and the middle part of the body blade lip (114) gradually protrudes outward. The air outlet (115) is provided on the body blade lip (114) and is connected to the air inlet. The chamber (112) is connected, and the air outlet (115) forms the air outlet (140) after the knife cover (120) is closed onto the knife body (110). The knife body cover (116) and the mounting part (117) are provided on the knife body (111). The knife body cover (116) is used to close the knife cover (120) onto the knife body (110), and the mounting part (117) is used to install the film-applying air knife (100) onto the external bracket.

3. The film-applying air knife (100) according to claim 2, characterized in that, The knife cover (120) includes a cover body (121), a knife lip (122), and a knife cover fitting part (123). The knife lip (122) is located on one side of the cover body (121), and the middle part of the knife lip (122) gradually protrudes outward. The knife cover fitting part (123) is provided on the cover body (121) and penetrates the large surface of the cover body (121). The knife cover fitting part (123) can fit with the knife body fitting part (116). After fitting, the knife lip (122) and the knife lip (114) form the knife lip (130), and the air outlet (115) forms the air outlet groove (140).

4. A wind-knife film-applying mechanism (1000), comprising a film-applying frame (200), a film-applying slide block (300), and a wind-knife film-applying assembly (1000A), wherein the wind-knife film-applying assembly (1000A) comprises a linear drive module (400), a slide plate (500), and a film-applying wind knife (100) as described in any one of claims 1 to 3, wherein the slide rail of the film-applying slide block (300) is vertically fixed to both sides of the film-applying frame (200), the linear drive module (400) is fixed to the top of the film-applying frame (200), the slide plate (500) is fixed to the output end of the linear drive module (400) and the slider of the film-applying slide block (300), and the film-applying wind knife (1000) is mounted as described above. The part (117) is mounted under the slide plate (500), which allows the blade lip (130) to deflect along its length, so that the air outlet direction of the air outlet slot (140) is adjustable towards the surface of the battery (10) on the external material carrier mechanism. The part of the film-applying frame (200) located under the film-applying air knife (100) is hollowed out to form a film-applying channel (700). The linear drive module (400) is used to drive the slide plate (500) to carry the film-applying air knife (100) to move vertically along the slide rail of the film-applying slide group (300) and approach the battery (10), so as to apply wind-powered film to the surface of the battery (10) located in the film-applying channel (700) facing the film-applying air knife (100).

5. The air knife film application mechanism (1000) according to claim 4, characterized in that, The device includes two air-knife film-applying assemblies (1000A), which are mirror-symmetrically arranged at the upper and lower ends of the film-applying frame (200) and have a common film-applying channel (700). Two linear drive modules (400) drive two slide plates (500) to carry the two film-applying air knives (100) vertically closer along the slide rail of the film-applying slide group (300) to simultaneously apply wind-powered film to the upper and lower surfaces of the battery (10) located in the film-applying channel (700) facing the two film-applying air knives (100).

6. A method for applying film using an air knife, characterized in that, The air knife film application mechanism (1000) as described in any one of claims 4 to 5 includes the following steps: S1 Preparation: Prepare the insulating film strip (20) with the width of the insulating film strip (L3) being wider than the width of the battery (L2), prepare the air knife (100) with the length of the air outlet groove (L1) being longer than the width of the insulating film strip (L3), and prepare the air knife film application mechanism (1000), the external material carrier mechanism and the battery (10) to be filmed according to whether single-sided or double-sided film application is required. S2 Fabrication: The insulating film tape (20) is fabricated with a fabrication distance (D1), a fabrication angle (A1) and a preset fabrication tension below the film-applying air knife (1000) of the air knife film-applying mechanism (1000) and above the surface of the battery (10). S3 Adjusting the blade: Adjust the blade angle (A2) of the film-applying air knife (100) of the air knife film-applying mechanism (1000) so that the air outlet direction of the air outlet groove (140) is towards the surface of the battery (10) on the external material carrier mechanism; S4 Film Application: First, the linear drive module (400) drives the slide plate (500) to carry the film application air knife (100) vertically close to the insulating film strip (20) along the slide rail of the film application slide group (300) until the preset height of the knife mounting distance (D2) is reached; then, compressed air of preset pressure is introduced into the film application air knife (100); then, the film application air knife (100) moves relative to the battery (10) on the external material loading mechanism, and the surface of the battery (10) facing the film application air knife (100) is applied with air force film in the film application channel (700).

7. The air knife film application method according to claim 6, characterized in that, The tension of the fabric is 1.5 ± 0.5 kgf, which is proportional to the width of the edge film (L3), as determined by process testing.

8. The air knife film application method according to claim 7, characterized in that, The blade angle (A2) is 30~120°. The blade angle (A2) and the length (L1) and width of the air outlet groove determine the shape, length and width of the film-applying line (20C) by which the film-applying air knife (100) presses the insulating film tape (20) onto the surface of the battery (10).

9. The air knife film application method according to claim 8, characterized in that, The preset height of the blade mounting distance (D2), the preset blade mounting angle (A2), and the preset pressure of the compressed air ensure that the pressure of the film-applying air blowing on the film-applying line (20C) meets 15±5Mpa. The pressure of the film-applying air is proportional to the area of ​​the film-applying line (20C), as determined by process testing.

10. The air knife film application method according to claim 9, characterized in that, The distance between the blade (130) and the battery (10) gradually increases from the middle to both ends. The strength of the airflow blowing from the air outlet (140) towards the battery (10) gradually weakens from the middle to both ends. The film-applying airflow that meets the pressure requirements first reaches a midpoint and then extends continuously to both ends, reliably pressing the insulating film tape (20) onto the surface of the battery (10) from point to line, forming the film-applying line (20C), ensuring that no defects such as adhesive residue, bubbles, or wrinkles appear on the film-applying line (20C); as the film-applying air blade (130)... 0) With stable relative movement with the battery (10), the film-applying line (20C) extends continuously in the height direction of the battery (10) to reliably press the insulating film strip (20) onto the surface of the battery (10) from line to surface to obtain the film-applying surface (20B), ensuring that no defects such as adhesive peeling, bubbles, or wrinkles appear on the film-applying surface (20B). Finally, the entire surface of the battery (10) becomes a complete film-applying surface (20B), ensuring that no defects such as adhesive peeling, bubbles, wrinkles, corners, or lifting appear on the complete film-applying surface (20B).

11. The air knife film application method according to claim 10, characterized in that, The preparation stage and the film-laying stage allow the insulating film tape (20) to retain some extensions on the complete film-laying surface (20B) after film application, so that it can be subsequently folded and applied to the side, top, and bottom surfaces of the battery (10) according to process requirements.

12. The air knife film application method according to claim 11, characterized in that, The distance between the film layers (D1) is between 1 and 3 mm, and the angle between the film layers (A1) is between 0 and 3°, to ensure that the film application line (20C) and the film application surface (20B) do not delaminate during the film application process, and to ensure that the insulating film tape (20A) does not touch the surface of the battery (10) during the film application process.

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