Laser automatic film removing equipment and method for lithium battery cell insulation protective film

Abstract

The application relates to laser automatic film removing equipment and method for lithium battery cell insulation protection film, and contains a modification unit, the modification unit comprises a product modification in-out shaft, a modification mechanical hand assembly, a product modification turnover mechanism, a transfer assembly line and a modification rack, the modification mechanical hand assembly is installed on the modification rack on one side of the product modification in-out shaft, the product modification turnover mechanism is installed on one side near the negative direction of the X shaft above the product modification in-out shaft, and the transfer assembly line is installed on one side along the negative direction of the X shaft on the modification rack. Through the cooperation of the modification unit and the film tearing unit, the film tearing treatment of the insulation protection film on six surfaces and the structural glue on two surfaces can be realized, the degree of automation is high, the laser is used for modifying the insulation protection film by accurately controlling process parameters, and the surface aluminum shell of the battery cell is not damaged.

Description

Technical Field

[0001] This invention relates to an automatic laser film removal device and method for insulating protective film on lithium battery cells. Background Technology

[0002] With technological advancements and increased environmental awareness among users, the market share of new energy vehicles is gradually increasing, leading to a surge in the production of lithium batteries, the power source for these vehicles. To ensure the safety of lithium battery cells, an insulating protective film is wrapped around them during the manufacturing process to prevent direct contact between the cell and the aluminum casing, which could cause a short circuit. Figure 1 The diagram shows the external shape of a lithium-ion battery cell. The surface of a lithium-ion battery cell can be divided into six sides: A, B, C, D, E, and F. Sides A and E are opposite each other, side B and F are opposite each other, and side C and D are opposite each other. Side C has a raised terminal post installed. Sides A, D, and E are completely covered by an insulating protective film made of PET and acrylic material. Sides B, C, and F are partially covered. Sides B and F are covered by an insulating protective film made of structural adhesive material, but due to the strong adhesion of the insulating protective film, its complete and rapid removal is very difficult. Directly removing it by manual or mechanical scraping methods results in low processing efficiency, excessive surface residue, and damage to the aluminum material on the cell surface.

[0003] Given that current film removal methods cannot meet production needs, there is an urgent need to develop laser-based automated film removal equipment and methods for lithium battery cell insulation protective films. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a laser-automatic film removal equipment and method for the insulating protective film of lithium battery cells.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] The laser automatic film removal equipment for the insulating protective film of lithium battery cells is characterized by: including a modification unit, which includes a product modification inlet / outlet shaft, a modification robot assembly, a product modification flipping mechanism, a transfer assembly line, and a modification frame. At least one product modification inlet / outlet shaft is evenly distributed along the Y-axis direction on the modification frame, and the product inlet / outlet shaft is set along the X-axis direction. A modification robot assembly is installed on the modification frame on one side of the product modification inlet / outlet shaft. A product modification flipping mechanism is installed on the side of the product modification inlet / outlet shaft near the negative X-axis direction. A transfer assembly line is installed on the side of the modification frame along the negative X-axis direction.

[0007] It also includes a film-tearing unit, which includes a product film-tearing inlet / outlet shaft, a product film-tearing flipping mechanism, an automatic tape feeding system, a rolling mechanism, a film-tearing robot assembly, a feeding line, a film-tearing frame, and a product transfer mechanism. At least one product film-tearing inlet / outlet shaft with the same structure as the aforementioned product modification inlet / outlet shaft is evenly distributed along the X-axis direction on the film-tearing frame, and the product film-tearing inlet / outlet shaft is set along the Y-axis direction. Above the product film-tearing inlet / outlet shaft, along the positive Y-axis direction, the automatic tape feeding system, the product film-tearing flipping mechanism, and the rolling mechanism are sequentially arranged. A product transfer mechanism is installed on one side of the film-tearing frame along the negative Y-axis direction. A film-tearing robot assembly is installed on the film-tearing frame on the side of the product film-tearing inlet / outlet shaft along the positive Y-axis direction. A feeding line is installed on one side of the film-tearing frame along the positive X-axis direction.

[0008] The transfer line can be extended to one side of the film-tearing frame along the negative Y-axis. Roll-to-roll tape wrapping mechanisms are installed on both sides of the transfer line between the modification frame and the film-tearing frame along the X-axis.

[0009] Furthermore, the product modification infeed / outfeed shaft or product film-removal infeed / outfeed shaft includes an infeed / outfeed shaft X-axis linear motor and a fixture. The infeed / outfeed shaft X-axis linear motor is mounted on the modification frame along the X-axis direction. The infeed / outfeed shaft X-axis linear motor can drive the fixture above to move along the X-axis direction. The fixture includes a fixture base, a fixture inner frame, an X-axis positioning drive module, a Y-axis positioning drive module, a suction cup rotation drive module, and a suction cup lifting cylinder. The fixture inner frame is mounted on the fixture base. The suction cup lifting cylinder is mounted on the fixture base below the fixture inner frame. The drive end at the top of the fixture lifting cylinder can drive the fixture lifting frame located in the middle of the inner side of the fixture inner frame to move along the Z-axis direction. A rotating shaft is installed in the middle of the jig lifting frame. A suction cup rotation drive module installed at the bottom of the jig lifting frame can drive the rotating shaft above to rotate. A vacuum suction cup is installed on the top of the rotating shaft. A first positioning strip is provided on the top of the jig inner frame on both sides of the vacuum suction cup along the X-axis direction. A second positioning strip is provided on the top of the jig inner frame on both sides of the vacuum suction cup along the Y-axis direction. An X-axis positioning drive module installed on the jig inner frame can drive the two first positioning strips to move towards or away from each other along the X-axis direction. A Y-axis positioning drive module installed on the jig inner frame can drive the two second positioning strips to move towards or away from each other along the Y-axis direction.

[0010] Furthermore, the modified manipulator assembly includes a modified manipulator, a laser rangefinder, a dust removal device, and a scanning galvanometer for emitting a laser beam. The modified manipulator is mounted on a modified frame, a scanning galvanometer is mounted on the drive end of the modified manipulator, and a laser rangefinder and a dust removal device are mounted on one side of the scanning galvanometer.

[0011] The film-tearing robot assembly includes a film-tearing robot and a film-tearing gripper cylinder. The film-tearing robot is mounted on the film-tearing machine frame, and the film-tearing gripper cylinder is mounted on the drive end of the film-tearing robot.

[0012] Furthermore, the product modification and flipping mechanism or the product film-tearing and flipping mechanism includes a flipping Z-axis module, a flipping rotary cylinder, a flipping gripper cylinder, and a flipping laser sensor. The flipping Z-axis module is mounted on the modification frame or film-tearing frame via a flipping gantry. The flipping Z-axis module can drive the flipping rotary cylinder to move along the Z-axis direction. The flipping rotary cylinder can drive the flipping gripper cylinder to rotate. A flipping laser sensor is installed on the flipping gripper cylinder.

[0013] Furthermore, the transfer assembly line includes a transfer gantry, a transfer Y-axis conveyor belt, a transfer Y-axis transfer module, a transfer lifting cylinder, and a transfer gripper cylinder. The transfer Y-axis transfer module installed on the transfer gantry can drive the transfer lifting cylinder to move along the Y-axis direction, and the transfer lifting cylinder can drive the transfer gripper cylinder to move along the Z-axis direction. A transfer Y-axis conveyor belt is installed on one side of the transfer gantry along the negative Y-axis direction, and the transfer Y-axis conveyor belt can continue to extend to the film-tearing machine frame on one side along the negative Y-axis direction.

[0014] The unloading production line includes an unloading Y-axis transfer module, an unloading X-axis conveyor belt, an unloading gripper cylinder, and an unloading gantry. The unloading Y-axis transfer module installed on the unloading gantry can drive the unloading gripper cylinder to move along the Y-axis direction. An unloading X-axis conveyor belt is installed on one side of the unloading gantry along the negative Y-axis direction.

[0015] The product transfer mechanism includes a transfer X-axis transfer module, a transfer Z-axis transfer module, and a transfer gripper cylinder. The transfer X-axis transfer module is mounted on the film-tearing machine frame along the X-axis direction, and the transfer X-axis transfer module can drive at least one transfer Z-axis transfer module to move along the X-axis direction. The transfer Z-axis transfer module can drive the transfer gripper cylinder to move along the Z-axis direction.

[0016] Furthermore, the roll-to-roll tape coating mechanism includes a tape coating frame, a take-up motor, an unwind motor, a tape pressing cylinder, a tape coating Z-axis module, a tape coating gripper cylinder, and a tape coating rotary cylinder. A take-up motor for connecting to the take-up shaft and an unwind motor for connecting to the unwind shaft are mounted side-by-side along the Y-axis on the tape coating frame. A first tape is installed between the take-up shaft and the unwind shaft. A tape pressing cylinder is installed on the tape coating frame behind the roll-to-roll tape, and a tape coating Z-axis module is installed on the tape coating frame above the roll-to-roll tape. The tape coating Z-axis module can drive the tape coating rotary cylinder to move along the Z-axis, and the tape coating rotary cylinder can drive the tape coating gripper cylinder to rotate.

[0017] Furthermore, the automatic tape feeding system includes an automatic tape feeding gantry, a tape feeding X-axis module, a tape feeding Z-axis module, and a roll feeding module. The tape feeding X-axis module mounted on the automatic tape feeding gantry can drive the tape feeding Z-axis module to move along the X-axis direction, and the tape feeding Z-axis module can drive the roll feeding module to move along the Z-axis direction. The roll feeding module includes a roll feeding frame, a roll feeding shaft, a tape pulling cylinder, a first rolling cylinder, and a cutting cylinder. The frame is equipped with a feed shaft for feeding the second tape and several guide shafts for guiding the second tape. Near the center of the guide shafts, there are pull cylinders for pulling the second tape. At the bottom of the guide shafts, from top to bottom, there are cutting cylinders and first rolling cylinders. The cutting blade on the cutting cylinder can be used to cut the second tape, and the rolling shaft on the first rolling cylinder can be used to roll the second tape.

[0018] Furthermore, the rolling mechanism includes a rolling gantry, a second rolling cylinder, a spring, rollers, and a rolling bracket. The second rolling cylinder is mounted on the rolling gantry and can drive the lower rolling bracket to move along the Z-axis direction via the spring. Rollers are mounted on the rolling bracket.

[0019] The present invention provides an automated laser removal method for the insulating protective film of lithium battery cells, comprising the following steps:

[0020] Step 1: The product is manually placed on the fixture of the X-axis linear motor of the product modification input / output axis, keeping the A-side of the product facing upwards. At this time, the product is located at the first modification station. The X-axis positioning drive module and the Y-axis positioning drive module drive the two first positioning bars and the two second positioning bars respectively to achieve the positioning and clamping of the product, thus completing the loading.

[0021] Step 2: The X-axis linear motor moves along the negative direction of the X-axis to the second modification station. The laser rangefinder measures the distance and provides feedback. The modification robot adjusts its position up and down according to the feedback from the laser rangefinder. Then, the scanning galvanometer performs laser modification on the A-side of the product.

[0022] Step 3: Release the product positioning and clamping from Step 2. The suction cup lifting cylinder drives the fixture lifting frame to rise, and the modification robot arm drives the scanning galvanometer to rotate. The scanning galvanometer performs laser modification on the insulating protective film on the C side of the product. Then, the suction cup rotation drive module rotates counterclockwise, and the scanning galvanometer performs laser modification on the insulating protective film and structural adhesive on the B side of the product. Then, the suction cup rotation drive module continues to rotate counterclockwise, and the scanning galvanometer performs laser modification on the insulating protective film on the D side of the product. Then, the suction cup rotation drive module continues to rotate counterclockwise, and the scanning galvanometer performs laser modification on the insulating protective film and structural adhesive on the F side of the product. Thus, this step sequentially completes the laser modification of the C, B, D, and F sides of the product. Then, the suction cup lifting cylinder drives the fixture lifting frame to descend, and the product positioning and clamping from Step 2 continues.

[0023] Step 4: The X-axis linear motor drives the fixture to transfer the product to the third modification station along the negative direction of the X-axis. The suction cup lifting cylinder drives the fixture lifting frame to lift. The flipping Z-axis module descends and senses the presence of the product through the flipping laser sensor. Then, the flipping gripper cylinder clamps the product. The flipping Z-axis module rises and the flipping rotation cylinder rotates. After that, the flipping Z-axis module descends and the flipping gripper cylinder releases the product. Continue to position and clamp the product in Step 2. At this time, the E-side of the product is set upwards.

[0024] Step 5: The X-axis linear motor drives the fixture to transfer the product to the second modification station along the positive direction of the X-axis. The modification robot moves the scanning galvanometer to directly above the product, measures the distance with a laser rangefinder and provides feedback. The modification robot adjusts its position up and down according to the feedback from the laser rangefinder, and then the scanning galvanometer performs laser modification on the E-side of the product.

[0025] Step Six: The X-axis linear motor drives the fixture to transfer the product to the fourth modification station along the negative direction of the X-axis. Under the action of the Y-axis transfer module, the transfer lifting cylinder and the transfer gripper cylinder, the product is picked up and placed on the Y-axis conveyor belt. The product moves along the negative direction of the Y-axis and flows to the first film-tearing station via the Y-axis conveyor belt.

[0026] Step 7: The tape-wrapping Z-axis module, together with the tape-wrapping gripper cylinder and the tape-wrapping rotary cylinder, grips and rotates the product. The pressing cylinder completely presses the first tape onto the structural adhesive on the B and F sides of the product. Together with the unwinding motor and the rewinding motor, the structural adhesive on the B and F sides of the product is automatically removed.

[0027] Step 8: The product continues to move along the negative direction of the Y-axis conveyor belt and flows to the tape application station. Then, under the action of the transfer Z-axis transfer module and the transfer gripper cylinder, the product is lowered and transferred to the fixture of the X-axis linear motor of the product film-tearing input / output axis. The tape-pulling cylinder pulls out the second tape, and the tape-feeding Z-axis module lowers to stick half of the second tape to the product and suspend the other half in the air. The tape-feeding Z-axis module, in conjunction with the rolling cylinder, rolls the second tape onto the product, and the cutting cylinder cuts the second tape. The above processing of the six sides of the product is completed sequentially by the flipping of the product film-tearing flipping mechanism and the rotation drive module of the fixture's suction cup.

[0028] Step Nine:

[0029] The X-axis linear motor moves along the positive direction of the X-axis and moves the fixture to the rolling station. Then the second rolling cylinder descends and the roller presses the second tape firmly.

[0030] Step 10:

[0031] The X-axis linear motor moves along the positive direction of the X-axis and moves the fixture to the second film-tearing station. The film-tearing gripper cylinder clamps the second half of the tape that is suspended in the air. The film-tearing robot moves in three dimensions in space to perform film-tearing. The waste film is thrown into the waste film collection box by the film-tearing robot.

[0032] Step 11: Under the action of the Y-axis transfer module and the clamping cylinder, the product is transferred to the X-axis conveyor belt and transported out along the positive direction of the X-axis.

[0033] Compared with the prior art, the present invention has significant advantages and beneficial effects, specifically reflected in the following aspects:

[0034] ① This invention, through the coordinated operation of the modification unit and the film-peeling unit, can achieve the film-peeling process of the insulating protective film on six sides of the product and the structural adhesive on two of them. It has a high degree of automation. By precisely controlling the process parameters, the laser can modify the insulating protective film without damaging the aluminum shell on the surface of the battery cell.

[0035] ② This invention cleverly utilizes the transmissivity of the insulating protective film to a certain wavelength of laser light, allowing the laser to directly act on the pressure-sensitive adhesive layer, causing the pressure-sensitive adhesive to heat up and undergo modification, ultimately reducing its adhesion and greatly reducing the difficulty of removing the insulating protective film.

[0036] ③ The method of the present invention prevents the surface material of the insulating protective film from being physically damaged by melting, vaporization, etc.; the surface temperature rise of the lithium battery cell is less than 70°C, and the aluminum material of the lithium battery cell is not damaged.

[0037] ④ The modification module of this invention can quickly select the processing surface of the lithium battery cell in space, thereby efficiently modifying the six surfaces of the lithium battery cell; the robotic arm automatically peels off the film, saving manpower;

[0038] ⑤ The production fixture of the present invention is a highly compatible mechanism, which is combined with functions such as vacuum adsorption and rotation, and a robotic arm for automatically tearing the film and an automatic adhesive application mechanism.

[0039] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing specific embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 : A schematic diagram of the external shape of the lithium battery cell used in this invention;

[0042] Figure 2 : A schematic diagram of the structure of the laser automatic film removal equipment of the present invention;

[0043] Figure 3 : Figure 2 A schematic diagram of the structure of the product modification inlet / outlet shaft or the product film-removal inlet / outlet shaft;

[0044] Figure 4 : Figure 3 A structural diagram of one side of the central fixture;

[0045] Figure 5 : Figure 3 A schematic diagram of the structure on the other side of the central fixture;

[0046] Figure 6 : Figure 2 A schematic diagram of the structure of the modified robotic arm component;

[0047] Figure 7 : Figure 2 A schematic diagram of the structure of the product modification flipping mechanism or the product film-tearing flipping mechanism;

[0048] Figure 8 : Figure 2 Schematic diagram of the intermediate transfer assembly line;

[0049] Figure 9 : Figure 2 A schematic diagram of the structure of the roll-to-roll adhesive tape wrapping mechanism;

[0050] Figure 10 : Figure 2 Schematic diagram of the automatic feeding system for medium-density conveyor belts;

[0051] Figure 11 : Figure 2 Schematic diagram of the intermediate rolling mechanism;

[0052] Figure 12 : Figure 2 Schematic diagram of the structure of the film-tearing robotic arm assembly;

[0053] Figure 13 : Figure 2 Schematic diagram of the structure of the intermediate feeding and unloading production line;

[0054] Figure 14 : Figure 2 Schematic diagram of the structure of the intermediate product transfer mechanism;

[0055] Figure 15 : A schematic diagram of the film peeling process of this invention;

[0056] Figure 16 : Schematic diagram of laser large-area modification of the present invention;

[0057] Figure 17 : Schematic diagram of laser side modification of the present invention.

[0058] The accompanying figure is labeled as follows:

[0059] 1. Product modification infeed / outfeed axis; 2. Product modification flipping mechanism; 3. Transfer line; 4. Modification frame; 5. Roll-to-roll tape wrapping mechanism; 6. Product film tearing infeed / outfeed axis; 7. Product film tearing flipping mechanism; 8. Automatic tape feeding system; 9. Rolling mechanism; 10. Film tearing robot assembly; 11. Unloading line; 12. Film tearing frame; 13. Product transfer mechanism; 14. Infeed / outfeed axis X-axis linear motor; 15. Fixture; 16. X-axis positioning drive module; 17. Y-axis positioning drive module; 18. Suction cup rotation drive module; 19. Suction cup lifting cylinder; 20. Modification robot; 21. Laser rangefinder; 22. Dust removal device; 23. Scanning galvanometer; 24. Laser beam; 25. Flipping Z-axis module; 31. Flipping rotary cylinder; 32. Flipping gripper cylinder; 33. Flipping laser sensor; 34. Transfer gantry; 41. Transfer Y-axis. 42. Conveyor belt, Y-axis transfer module, 43. Transfer lifting cylinder, 44. Transfer gripper cylinder, 45. Take-up motor, 61. Unwind motor, 62. Pressing cylinder, 63. Tape wrapping Z-axis module, 64. Tape wrapping gripper cylinder, 65. Tape wrapping rotary cylinder, 66. Tape feeding X-axis module, 91. Tape feeding Z-axis module, 92. Roll feeding shaft, 93. Belt pulling cylinder, 94. First rolling cylinder. 5. Cutting cylinder 96, Second rolling cylinder 101, Spring 102, Roller 103, Rolling support 104, Film tearing robot 111, Film tearing gripper cylinder 112, Unloading Y-axis transfer module 121, Unloading X-axis conveyor belt 122, Unloading gripper cylinder 123, Unloading gantry 124, Transfer X-axis transfer module 141, Transfer Z-axis transfer module 142, Transfer gripper cylinder 143. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0061] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, directional and ordinal terms are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0062] like Figures 1 to 17As shown, the laser automatic film removal equipment for the insulating protective film of lithium battery cells includes a modification unit. The modification unit includes a product modification inlet / outlet shaft 1, a modification robot assembly 2, a product modification flipping mechanism 3, a transfer line 4, and a modification frame 5. At least one product modification inlet / outlet shaft 1 is evenly distributed along the Y-axis direction on the modification frame 5, and the product inlet / outlet shaft 1 is set along the X-axis direction. The modification robot assembly 2 is installed on the modification frame 5 on one side of the product modification inlet / outlet shaft 1. The product modification flipping mechanism 3 is installed on the side of the product modification inlet / outlet shaft 1 near the negative X-axis direction. The transfer line 4 is installed on the side of the modification frame 5 along the negative X-axis direction. It also includes a film-tearing unit, which includes a product film-tearing inlet / outlet shaft 7, a product film-tearing flipping mechanism 8, an automatic tape feeding system 9, a rolling mechanism 10, a film-tearing robot assembly 11, a feeding line 12, a film-tearing frame 13, and a product transfer mechanism 14. At least one product film-tearing inlet / outlet shaft 7 with the same structure as the aforementioned product modification inlet / outlet shaft 1 is evenly distributed along the X-axis direction on the film-tearing frame 13, and the product film-tearing inlet / outlet shaft 7 is arranged along the Y-axis direction. Above the product film-tearing inlet / outlet shaft 7, along the positive Y-axis direction, the automatic tape feeding system 9, the product film-tearing flipping mechanism 8, and the rolling mechanism 10 are arranged sequentially. On the side of the film-tearing frame 13 along the negative Y-axis direction, the product transfer mechanism 14 is installed. On the side of the film-tearing frame 13 along the positive Y-axis direction of the product film-tearing inlet / outlet shaft 7, the film-tearing robot assembly 11 is installed. On the side of the film-tearing frame 13 along the positive X-axis direction, the feeding line 12 is installed. The transfer line 4 can be extended to one side of the film-tearing frame 13 along the negative Y-axis. Roll-to-roll tape wrapping mechanisms 6 are installed on both sides of the transfer line 4 between the modification frame 5 and the film-tearing frame 13 along the X-axis.

[0063] The product modification in / out axis 1 or the product film removal in / out axis 7 is used for clamping and moving the product, i.e., the lithium battery cell. It includes an in / out axis X-axis linear motor 15 and a fixture 16. The in / out axis X-axis linear motor 15 is mounted on the modification frame 5 along the X-axis direction. The in / out axis X-axis linear motor 15 can drive the upper fixture 16 to move along the X-axis direction. The fixture 16 includes a fixture base, a fixture inner frame, an X-axis positioning drive module 17, a Y-axis positioning drive module 18, a suction cup rotation drive module 19, and a suction cup lifting cylinder 20. The fixture inner frame is mounted on the fixture base. The suction cup lifting cylinder 20 is mounted on the fixture base below the fixture inner frame. The drive end at the top of the fixture lifting cylinder 20 can drive the upper fixture lifting frame, located in the middle of the inner side of the fixture inner frame, to move along the Z-axis direction. A rotating shaft is installed at the center of the lifting frame. A suction cup rotation drive module 19, installed at the bottom of the jig lifting frame, drives the rotating shaft to rotate. A vacuum suction cup is installed at the top of the rotating shaft. First positioning strips are provided on the top of the jig's inner frame on both sides of the vacuum suction cup along the X-axis, and second positioning strips are provided on the top of the jig's inner frame on both sides of the vacuum suction cup along the Y-axis. An X-axis positioning drive module 17, installed on the jig's inner frame, can drive the two first positioning strips to move towards or away from each other along the X-axis. A Y-axis positioning drive module 18, installed on the jig's inner frame 15, can drive the two second positioning strips to move towards or away from each other along the Y-axis. The jig 16 is bolted to the X-axis linear motor 15, which enables the jig 16 to move along the X-axis. The upper surface of the jig is equipped with X and Y-axis servo centering positioning mechanisms (i.e., two first positioning strips and two second positioning strips) for positioning and clamping the lithium battery cells. The fixture is equipped with a rotating mechanism and linear lifting mechanism to enable the lithium battery cell to move in the Z-axis direction and rotate around the Z-axis, so that the lithium battery cell does not interfere with the positioning block and other surface parts when rotating.

[0064] The modified robotic arm assembly 2 emits a laser beam according to set parameters to continuously scan the insulating protective film on the surface of the lithium battery cell, thereby reducing the adhesion of the insulating protective film after laser modification. It includes a modified robotic arm 21, a laser rangefinder 22, a dust removal device 23, and a scanning galvanometer 24 for emitting the laser beam 25. The modified robotic arm 21 is mounted on the modification frame 5. The scanning galvanometer 24 is mounted on the drive end of the modified robotic arm 21, and the laser rangefinder 22 and dust removal device 23 are mounted on one side of the scanning galvanometer 24. The laser rangefinder and dust removal device are integrated into a tool head mounted on an industrial robot, enabling the tool head to move with six degrees of freedom in space. The laser emitted by the laser is optically propagated to the scanning galvanometer, which then rapidly irradiates the insulating protective film on the surface of the lithium battery cell. The laser rangefinder is used for positioning and automatic focusing, and the dust removal device is used to collect fine debris generated during the modification process.

[0065] The film-tearing robot assembly 11 is used to attach tape to one end of the modified insulating protective film, and then tear off the insulating protective film by gripping the tape, and send the waste film into the waste film collection mechanism. It includes a film-tearing robot 111 and a film-tearing gripper cylinder 112. The film-tearing robot 111 is mounted on the film-tearing frame 13, and the film-tearing gripper cylinder 112 is mounted on the drive end of the film-tearing robot 111.

[0066] The product modification flipping mechanism 3 or the product film-tearing flipping mechanism 8 includes a flipping Z-axis module 31, a flipping rotary cylinder 32, a flipping gripper cylinder 33, and a flipping laser sensor 34. The flipping Z-axis module 31 is mounted on the modification frame 5 or the film-tearing frame 13 via a flipping gantry. The flipping Z-axis module 31 can drive the flipping rotary cylinder 32 to move along the Z-axis direction. The flipping rotary cylinder 32 can drive the flipping gripper cylinder 33 to rotate. The flipping gripper cylinder 33 is equipped with a flipping laser sensor 34.

[0067] The transfer assembly line 4 includes a transfer gantry 41, a transfer Y-axis conveyor belt 42, a transfer Y-axis transfer module 43, a transfer lifting cylinder 44, and a transfer gripper cylinder 45. The transfer Y-axis transfer module 43, which is installed on the transfer gantry 41, can drive the transfer lifting cylinder 44 to move along the Y-axis direction. The transfer lifting cylinder 44 can drive the transfer gripper cylinder 45 to move along the Z-axis direction. The transfer Y-axis conveyor belt 42 is installed on one side of the transfer gantry 41 along the negative Y-axis direction. The transfer Y-axis conveyor belt 42 can continue to extend to the film-tearing frame 13 on one side along the negative Y-axis direction.

[0068] The unloading production line 12 includes an unloading Y-axis transfer module 121, an unloading X-axis conveyor belt 122, an unloading gripper cylinder 123, and an unloading gantry 124. The unloading Y-axis transfer module 121, which is installed on the unloading gantry 124, can drive the unloading gripper cylinder 123 to move along the Y-axis direction. The unloading X-axis conveyor belt 122 is installed on one side of the unloading gantry 124 along the negative direction of the Y-axis.

[0069] The product transfer mechanism 14 includes a transfer X-axis transfer module 141, a transfer Z-axis transfer module 142, and a transfer gripper cylinder 143. The transfer X-axis transfer module 141 is mounted on the film-tearing frame 13 along the X-axis direction, and the transfer X-axis transfer module 141 can drive at least one transfer Z-axis transfer module 142 to move along the X-axis direction. The transfer Z-axis transfer module 142 can drive the transfer gripper cylinder 143 to move along the Z-axis direction.

[0070] The roll-to-roll tape wrapping mechanism 6 is used to peel off structural adhesive. It includes a tape wrapping frame, a take-up motor 61, an unwind motor 62, a tape pressure cylinder 63, a tape wrapping Z-axis module 64, a tape wrapping gripper cylinder 65, and a tape wrapping rotary cylinder 66. The take-up motor 61, which connects to the take-up shaft, and the unwind motor 62, which connects to the unwind shaft, are mounted side-by-side along the Y-axis on the tape wrapping frame. A first tape is installed between the take-up shaft and the unwind shaft. The tape pressure cylinder 63 is mounted on the tape wrapping frame behind the roll-to-roll tape, and the tape wrapping Z-axis module 64 is mounted on the tape wrapping frame above the roll-to-roll tape. The tape wrapping Z-axis module 64 can drive the tape wrapping rotary cylinder 66 to move along the Z-axis, and the tape wrapping rotary cylinder 66 can drive the tape wrapping gripper cylinder 65 to rotate. The roll-to-roll tape wrapping mechanism mainly includes a tape winding and unwinding motor and a tape pressing cylinder. It uses the adhesive properties of the tape to adhere the structural adhesive to the tape and automatically winds it up to achieve automatic removal of the structural adhesive.

[0071] The automatic tape feeding system 9 includes an automatic tape feeding gantry, a tape feeding X-axis module 91, a tape feeding Z-axis module 92, and a roll feeding module. The tape feeding X-axis module 91, mounted on the automatic tape feeding gantry, can drive the tape feeding Z-axis module 92 to move along the X-axis direction. The tape feeding Z-axis module 92 can drive the roll feeding module to move along the Z-axis direction. The roll feeding module includes a roll feeding frame, a roll feeding shaft 93, a tape pulling cylinder 94, a first rolling cylinder 95, and a cutting cylinder 96. The feeder frame is equipped with a feed shaft 93 for feeding the second tape and several feed guide shafts for guiding the second tape. Near the center of each feed guide shaft is a pull cylinder 94 for pulling the second tape. At the bottom of each feed guide shaft, from top to bottom, are a cutting cylinder 96 and a first rolling cylinder 95. The cutting blade on the cutting cylinder 96 is used to cut the second tape, and the rolling shaft on the first rolling cylinder 95 is used to roll the second tape. The pull cylinder pulls the second tape out, the Z-axis module descends to adhere the second tape to the product, the servo moves a certain length to adhere the second tape to the product, and the first cutting cylinder cuts the second tape.

[0072] The rolling mechanism 10 includes a rolling gantry, a second rolling cylinder 101, a spring 102, rollers 103, and a rolling support 104. The second rolling cylinder 101 is mounted on the rolling gantry and can drive the lower rolling support 104 to move along the Z-axis direction via the spring 102. Rollers 103 are mounted on the rolling support 104. The second rolling cylinder controls the rollers to move up and down in the Z-axis direction, while the spring acts as a buffer. The rollers roll the tape. During the rolling process, the lithium battery cells are driven to reciprocate in the X-axis direction by the product in / out axis, causing the tape to adhere to the insulating protective film.

[0073] The laser-automated method for removing the insulating protective film from lithium battery cells mainly includes:

[0074] First, laser modification of the insulating protective film on all six sides and the structural adhesive on sides B and F:

[0075] The insulating protective film is modified by irradiating it with a laser, causing its temperature to rise and reducing its adhesion, thus facilitating its removal. Specifically, the pulsed laser used has an output wavelength of 500-1100nm, a laser power greater than 50W, and a pulse width of 300fs to 1us. A shaped rectangular large spot, 1.5x0.5mm in size, is used to ensure uniform energy distribution during laser scanning, improve work efficiency, and shorten processing time. A scanning galvanometer controls the movement of the spot; the galvanometer can deflect left, right, up, and down according to instructions, thereby controlling the deflection angle of the laser. A laser rangefinder is used to achieve automatic laser focusing. The laser power, number of scans, scanning speed, and defocusing amount are controlled to ensure that the energy density is greater than the modification threshold of the insulating protective film but less than the damage threshold of the aluminum surface of the lithium battery cell. Ultimately, the entire insulating protective film is modified without damaging the surface of the lithium battery cell.

[0076] The removal methods for the structural adhesive and insulating protective film on sides B and F are the same. However, because the materials of the structural adhesive and the insulating protective film are different, their allowable process parameter ranges are also different. But they meet the criteria that the energy density is greater than the modification threshold of the insulating protective film and less than the damage threshold of the surface aluminum material of the lithium battery cell.

[0077] Second, remove the insulating protective film and structural adhesive from all six sides:

[0078] The modified insulating protective film and structural adhesive are peeled off from the lithium battery cell by first applying adhesive tape and then removing it. A piece of tape is attached to one end of the lithium battery cell, leaving a certain amount of space above the film. Rollers are used to press the overlapping portion of the tape and insulating protective film to ensure a strong bond. A gripper cylinder is used to clamp the exposed portion of the tape and tear it off, ultimately removing the insulating protective film. Waste film is collected after removal. The structural adhesive is completely wrapped with tape, and a motor and tension control system are used to unwind and rewind the tape roll, peeling off the structural adhesive during this process.

[0079] The laser-automatic method for removing the insulating protective film from lithium battery cells includes the following steps:

[0080] Step 1: The product is manually placed on the fixture 16 of the X-axis linear motor 15 of the product modification input / output axis 1, keeping the A-side of the product facing upward. At this time, the product is located at the first modification station. The X-axis positioning drive module 17 and the Y-axis positioning drive module 18 drive the two first positioning bars and the two second positioning bars respectively to achieve the positioning and clamping of the product, thus completing the loading.

[0081] Step Two: As Figure 16 The X-axis linear motor 15 moves along the negative direction of the X-axis to the second modification station. The laser rangefinder 22 measures the distance and provides feedback. The modification robot 21 moves up and down according to the feedback from the laser rangefinder 22. Then, the scanning galvanometer 24 performs laser modification on the A-side of the product.

[0082] Step 3:

[0083] like Figure 17 The positioning and clamping of the product in step two is released. The suction cup lifting cylinder 20 drives the fixture lifting frame to lift, and the modification robot 21 drives the scanning galvanometer 24 to rotate 90 degrees. The scanning galvanometer 24 performs laser modification on the insulating protective film on the C side of the product. Then, the suction cup rotation drive module 19 rotates 90 degrees counterclockwise, and the scanning galvanometer 24 performs laser modification on the insulating protective film and structural adhesive on the B side of the product. Then, the suction cup rotation drive module 19 continues to rotate 90 degrees counterclockwise, and the scanning galvanometer 24 performs laser modification on the insulating protective film on the D side of the product. Then, the suction cup rotation drive module 19 continues to rotate 90 degrees counterclockwise, and the scanning galvanometer 24 performs laser modification on the insulating protective film and structural adhesive on the F side of the product. Thus, this step sequentially completes the laser modification of the C, B, D, and F sides of the product. Then, the suction cup lifting cylinder 20 drives the fixture lifting frame to descend, and the positioning and clamping of the product in step two continues.

[0084] Step 4: The X-axis linear motor 15 drives the fixture 16 to transfer the product to the third modification station along the negative direction of the X-axis. The suction cup lifting cylinder 20 drives the fixture lifting frame to lift. The flipping Z-axis module 31 descends and senses the presence of the product through the flipping laser sensor 34. Then, the flipping gripper cylinder 33 clamps the product. Then, the flipping Z-axis module 31 rises and the flipping rotary cylinder 32 rotates 180 degrees. After that, the flipping Z-axis module 31 descends and the flipping gripper cylinder 33 releases the product. Continue to position and clamp the product in Step 2. At this time, the E-side of the product is set upwards.

[0085] Step 5:

[0086] The X-axis linear motor 15 drives the fixture 16 to transfer the product to the second modification station along the positive direction of the X-axis. The modification robot 21 drives the scanning galvanometer 24 to move directly above the product. The laser rangefinder 22 measures the distance and provides feedback. The modification robot 21 moves up and down according to the feedback from the laser rangefinder 22. Then the scanning galvanometer 24 performs laser modification on the E-side of the product.

[0087] Step Six: The X-axis linear motor 15 drives the fixture 16 to transfer the product to the fourth modification station along the negative direction of the X-axis. Under the action of the Y-axis transfer module 43, the transfer lifting cylinder 44 and the transfer gripper cylinder 45, the product is picked up and placed on the Y-axis conveyor belt 42. The product moves along the negative direction of the Y-axis through the Y-axis conveyor belt 42 and flows to the first film-tearing station.

[0088] Step Seven: As Figure 9 The tape-wrapping Z-axis module 64, together with the tape-wrapping gripper cylinder 65 and the tape-wrapping rotary cylinder 66, grips and rotates the product. The pressing cylinder 63 presses the first tape completely onto the structural adhesive on the B and F sides of the product. Together with the unwinding motor 62 and the rewinding motor 61, the structural adhesive on the B and F sides of the product is automatically removed.

[0089] Step 8: As Figure 10 The product continues to move along the negative direction of the Y-axis on the Y-axis conveyor belt 42 and flows to the tape application station. Then, under the action of the transfer Z-axis transfer module 142 and the transfer gripper cylinder 143, the product is lowered and transferred to the fixture 16 of the X-axis linear motor 15 of the product film tearing input / output axis 7. The tape pulling cylinder 94 pulls out the second tape, and the tape feeding Z-axis module 92 descends to stick half of the second tape to the product and suspend the other half. The tape feeding Z-axis module 92, in conjunction with the rolling cylinder 95, rolls the second tape onto the product, and the cutting cylinder 96 cuts the second tape. The above processing of the six sides of the product is completed in sequence by the flipping of the product film tearing flipping mechanism 8 and the suction cup rotation drive module 19 of the fixture 16.

[0090] Step Nine: As Figure 11 The X-axis linear motor 15 moves along the positive direction of the X-axis and moves the fixture 16 to the rolling station. Then the second rolling cylinder 101 descends and the roller 103 presses the second tape firmly.

[0091] Step 10:

[0092] like Figure 12 and Figure 15The X-axis linear motor 15 moves along the positive direction of the X-axis and moves the fixture 16 to the second film-tearing station. The film-tearing gripper cylinder 112 clamps the second half of the tape that is suspended in the air. The film-tearing robot 111 moves in three dimensions in space to perform film-tearing. The waste film is thrown into the waste film collection box by the film-tearing robot 111.

[0093] Step 11: Under the action of the Y-axis unloading transfer module 121 and the unloading gripper cylinder 123, the product is transferred to the X-axis unloading conveyor belt 122 and transported out along the positive direction of the X-axis.

[0094] This invention, through the synergistic cooperation of the modification unit and the film-peeling unit, can achieve the film-peeling process of the insulating protective film on six sides of the product and the structural adhesive on two of them. It has a high degree of automation. By precisely controlling the process parameters, the laser can modify the insulating protective film without damaging the aluminum shell on the surface of the battery cell.

[0095] By cleverly utilizing the transmissivity of the insulating protective film to a certain wavelength of laser light, the laser light can be directly applied to the pressure-sensitive adhesive layer, causing the pressure-sensitive adhesive to heat up and undergo modification, ultimately reducing its adhesion and greatly reducing the difficulty of removing the insulating protective film.

[0096] This ensures that the surface material of the insulating protective film is not physically damaged by melting, vaporization, or other means; the surface temperature rise of the lithium battery cell is less than 70°C, and the aluminum material of the lithium battery cell is not damaged.

[0097] The modification module can quickly select the processing surface of the lithium battery cell in space, thereby efficiently modifying all six surfaces of the lithium battery cell; the robotic arm automatically peels off the film, saving manpower;

[0098] The production fixture is a highly compatible mechanism, incorporating functions such as vacuum adsorption and rotation, and features a robotic arm for automatic film tearing and an automatic adhesive application mechanism.

[0099] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0100] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

[0101] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A laser automatic film removal equipment for insulating protective film of lithium battery cells, comprising a modification unit, the modification unit comprising a product modification inlet / outlet shaft (1), a modification robot assembly (2), a product modification flipping mechanism (3), a transfer assembly line (4) and a modification frame (5), wherein at least one product modification inlet / outlet shaft (1) is evenly distributed along the Y-axis direction on the modification frame (5), and the product modification inlet / outlet shaft (1) is arranged along the X-axis direction, the modification robot assembly (2) is installed on the modification frame (5) on one side of the product modification inlet / outlet shaft (1), the product modification flipping mechanism (3) is installed on the side of the product modification inlet / outlet shaft (1) near the negative X-axis direction, and the transfer assembly line (4) is installed on the side of the modification frame (5) along the negative X-axis direction; Its features are: It also includes a film-tearing unit, which comprises a product film-tearing inlet / outlet shaft (7), a product film-tearing flipping mechanism (8), an automatic tape feeding system (9), a rolling mechanism (10), a film-tearing robot assembly (11), a feeding line (12), a film-tearing frame (13), and a product transfer mechanism (14). At least one product film-tearing inlet / outlet shaft (7) with the same structure as the aforementioned product modification inlet / outlet shaft (1) is evenly distributed along the X-axis direction on the film-tearing frame (13), and the product film-tearing inlet / outlet shaft (7) is arranged along the Y-axis direction. Above the product tearing film inlet / outlet shaft (7), along the positive direction of the Y-axis, an automatic tape feeding system (9), a product tearing film flipping mechanism (8), and a rolling mechanism (10) are arranged in sequence. On the tearing film frame (13), along the negative direction of the Y-axis, a product transfer mechanism (14) is installed. On the tearing film frame (13) along the positive direction of the Y-axis, a tearing film robot assembly (11) is installed. On the tearing film frame (13) along the positive direction of the X-axis, a feeding line (12) is installed. The transfer line (4) can be extended to one side of the film-tearing frame (13) along the negative Y-axis. Roll-to-roll tape wrapping mechanisms (6) are installed on both sides of the transfer line (4) between the modified frame (5) and the film-tearing frame (13) along the X-axis. The roll-to-roll tape coating mechanism (6) includes a tape coating frame, a take-up motor (61), an unwind motor (62), a tape pressing cylinder (63), a tape coating Z-axis module (64), a tape coating gripper cylinder (65), and a tape coating rotary cylinder (66). A take-up motor (61) for connecting to the take-up shaft and an unwind motor (62) for connecting to the unwind shaft are respectively mounted side-by-side along the Y-axis on the tape coating frame. A first tape is installed between the roll and the unroll roll. A tape pressing cylinder (63) is installed on the tape wrapping frame behind the first tape. A tape wrapping Z-axis module (64) is installed on the tape wrapping frame above the first tape. The tape wrapping Z-axis module (64) can drive the tape wrapping rotary cylinder (66) to move along the Z-axis direction. The tape wrapping rotary cylinder (66) can drive the tape wrapping gripper cylinder (65) to rotate.

2. The laser automatic film removal equipment for the insulating protective film of lithium battery cells according to claim 1, characterized in that: The product modification inlet / outlet shaft (1) or product film removal inlet / outlet shaft (7) includes an inlet / outlet shaft X-axis linear motor (15) and a fixture (16). The inlet / outlet shaft X-axis linear motor (15) is mounted on the modification frame (5) along the X-axis direction. The inlet / outlet shaft X-axis linear motor (15) can drive the fixture (16) above to move along the X-axis direction. The fixture (16) includes a fixture base, a fixture inner frame, an X-axis positioning drive module (17), a Y-axis positioning drive module (18), a suction cup rotation drive module (19), and a suction cup lifting cylinder (20). The fixture inner frame is mounted on the fixture base. The suction cup lifting cylinder (20) is mounted on the fixture base below the fixture inner frame. The drive end at the top of the suction cup lifting cylinder (20) can drive the fixture located above and within the fixture inner frame. The jig lifting frame in the middle of the inner side moves along the Z-axis. A rotating shaft is installed in the middle of the jig lifting frame. The suction cup rotation drive module (19) installed at the bottom of the jig lifting frame can drive the rotating shaft above to rotate. A vacuum suction cup is installed on the top of the rotating shaft. A first positioning strip is provided on the top of the jig inner frame on both sides of the vacuum suction cup along the X-axis. A second positioning strip is provided on the top of the jig inner frame on both sides of the vacuum suction cup along the Y-axis. The X-axis positioning drive module (17) installed on the jig inner frame can drive the two first positioning strips to move towards or away from each other along the X-axis. The Y-axis positioning drive module (18) installed on the jig inner frame can drive the two second positioning strips to move towards or away from each other along the Y-axis.

3. The laser automatic film removal equipment for the insulating protective film of lithium battery cells according to claim 2, characterized in that: The modified manipulator assembly (2) includes a modified manipulator (21), a laser rangefinder (22), a dust removal device (23), and a scanning galvanometer (24) for emitting a laser beam (25). The modified manipulator (21) is mounted on a modified frame (5). The scanning galvanometer (24) is mounted on the drive end of the modified manipulator (21). The laser rangefinder (22) and the dust removal device (23) are mounted on one side of the scanning galvanometer (24). The film-tearing manipulator assembly (11) includes a film-tearing manipulator (111) and a film-tearing gripper cylinder (112). The film-tearing manipulator (111) is mounted on the film-tearing frame (13), and the film-tearing gripper cylinder (112) is mounted on the drive end of the film-tearing manipulator (111).

4. The laser automatic film removal equipment for the insulating protective film of lithium battery cells according to claim 3, characterized in that: The product modification flipping mechanism (3) or product film tearing flipping mechanism (8) includes a flipping Z-axis module (31), a flipping rotary cylinder (32), a flipping gripper cylinder (33), and a flipping laser sensor (34). The flipping Z-axis module (31) is mounted on the modification frame (5) or the film tearing frame (13) via a flipping gantry. The flipping Z-axis module (31) can drive the flipping rotary cylinder (32) to move along the Z-axis direction. The flipping rotary cylinder (32) can drive the flipping gripper cylinder (33) to rotate. The flipping gripper cylinder (33) is equipped with a flipping laser sensor (34).

5. The laser automatic film removal equipment for the insulating protective film of lithium battery cells according to claim 4, characterized in that: The transfer assembly line (4) includes a transfer gantry (41), a transfer Y-axis conveyor belt (42), a transfer Y-axis transfer module (43), a transfer lifting cylinder (44), and a transfer gripper cylinder (45). The transfer Y-axis transfer module (43) installed on the transfer gantry (41) can drive the transfer lifting cylinder (44) to move along the Y-axis direction. The transfer lifting cylinder (44) can drive the transfer gripper cylinder (45) to move along the Z-axis direction. A transfer Y-axis conveyor belt (42) is installed on one side of the transfer gantry (41) along the negative Y-axis direction. The transfer Y-axis conveyor belt (42) can continue to extend to one side of the film-tearing frame (13) along the negative Y-axis direction. The unloading production line (12) includes an unloading Y-axis transfer module (121), an unloading X-axis conveyor belt (122), an unloading gripper cylinder (123), and an unloading gantry (124). The unloading Y-axis transfer module (121) installed on the unloading gantry (124) can drive the unloading gripper cylinder (123) to move along the Y-axis direction. An unloading X-axis conveyor belt (122) is installed on one side of the unloading gantry (124) along the negative Y-axis direction. The product transfer mechanism (14) includes a transfer X-axis transfer module (141), a transfer Z-axis transfer module (142), and a transfer gripper cylinder (143). The transfer X-axis transfer module (141) is mounted on the film-tearing frame (13) along the X-axis direction, and the transfer X-axis transfer module (141) can drive at least one transfer Z-axis transfer module (142) to move along the X-axis direction. The transfer Z-axis transfer module (142) can drive the transfer gripper cylinder (143) to move along the Z-axis direction.

6. The laser automatic film removal equipment for the insulating protective film of lithium battery cells according to claim 5, characterized in that: The automatic tape feeding system (9) includes an automatic tape feeding gantry, a tape feeding X-axis module (91), a tape feeding Z-axis module (92), and a roll feeding module. The tape feeding X-axis module (91) mounted on the automatic tape feeding gantry can drive the tape feeding Z-axis module (92) to move along the X-axis direction. The tape feeding Z-axis module (92) can drive the roll feeding module to move along the Z-axis direction. The roll feeding module includes a roll feeding frame, a roll feeding shaft (93), a tape pulling cylinder (94), a first rolling cylinder (95), and a cutting cylinder (96). The roll feeding frame is equipped with a roll feeding shaft (93) for feeding the second tape and several roll guide shafts for guiding the second tape. A pull cylinder (94) for pulling the second tape is installed near the middle of several roll guide shafts. A cutting cylinder (96) and a first rolling cylinder (95) are installed sequentially from top to bottom at the bottom of several roll guide shafts. The cutting blade on the cutting cylinder (96) can be used for cutting the second tape, and the rolling shaft on the first rolling cylinder (95) can be used for rolling the second tape.

7. The laser automatic film removal equipment for the insulating protective film of lithium battery cells according to claim 6, characterized in that: The rolling mechanism (10) includes a rolling gantry, a second rolling cylinder (101), a spring (102), a roller (103), and a rolling bracket (104). The second rolling cylinder (101) is mounted on the rolling gantry. The second rolling cylinder (101) can drive the lower rolling bracket (104) to move along the Z-axis direction through the spring (102). The roller (103) is mounted on the rolling bracket (104).

8. A method for automatically removing the insulating protective film from lithium battery cells using the laser automatic film removal equipment as described in claim 7, characterized in that: Includes the following steps: Step 1: The product is placed manually on the fixture (16) of the X-axis linear motor (15) of the product modification input / output shaft (1), keeping the A-side of the product facing upward. At this time, the product is located at the first modification station. The X-axis positioning drive module (17) and the Y-axis positioning drive module (18) drive the two first positioning bars and the two second positioning bars respectively to achieve the positioning and clamping of the product, thus completing the loading. Step 2: The X-axis linear motor (15) moves along the negative direction of the X-axis to the second modification station. The laser rangefinder (22) measures the distance and provides feedback. The modification robot (21) moves up and down according to the feedback from the laser rangefinder (22). Then, the scanning galvanometer (24) performs laser modification on the A-side of the product. Step 3: Release the product positioning and clamping from Step 2. The suction cup lifting cylinder (20) drives the jig lifting frame to lift, and the modification robot (21) drives the scanning galvanometer (24) to rotate 90 degrees. The scanning galvanometer (24) performs laser modification on the insulating protective film on the C side of the product. Then, the suction cup rotation drive module (19) rotates 90 degrees counterclockwise, and the scanning galvanometer (24) performs laser modification on the insulating protective film and structural adhesive on the B side of the product. The needle continues to rotate 90 degrees, and the scanning galvanometer (24) performs laser modification on the insulating protective film on the D side of the product; then the suction cup rotation drive module (19) continues to rotate 90 degrees counterclockwise, and the scanning galvanometer (24) performs laser modification on the insulating protective film and structural adhesive on the F side of the product; at this point, this step has completed the laser modification of the C side, B side, D side and F side of the product in sequence; then the suction cup lifting cylinder (20) drives the fixture lifting frame to descend, and continues the positioning and clamping of the product in step two; Step 4: The X-axis linear motor (15) drives the fixture (16) to transfer the product to the third modification station along the negative direction of the X-axis. The suction cup lifting cylinder (20) drives the fixture lifting frame to lift. The flipping Z-axis module (31) descends and senses the presence or absence of the product through the flipping laser sensor (34). Then, the flipping gripper cylinder (33) clamps the product. Then, the flipping Z-axis module (31) rises and the flipping rotary cylinder (32) rotates 180 degrees. After that, the flipping Z-axis module (31) descends and the flipping gripper cylinder (33) releases the product. Continue to position and clamp the product in step 2. At this time, the E-side of the product is set upward. Step 5: The X-axis linear motor (15) drives the fixture (16) to transfer the product to the second modification station along the positive direction of the X-axis. The modification robot (21) drives the scanning galvanometer (24) to move directly above the product. The laser rangefinder (22) measures the distance and provides feedback. The modification robot (21) adjusts its position up and down according to the feedback from the laser rangefinder (22). Then, the scanning galvanometer (24) performs laser modification on the E-side of the product. Step 6: The X-axis linear motor (15) drives the fixture (16) to transfer the product to the fourth modification station along the negative direction of the X-axis. Under the action of the Y-axis transfer module (43), the transfer lifting cylinder (44) and the transfer gripper cylinder (45), the product is picked up and placed on the Y-axis conveyor belt (42). The product moves along the negative direction of the Y-axis through the Y-axis conveyor belt (42) and flows to the first film-tearing station. Step 7: The tape-wrapping Z-axis module (64) works with the tape-wrapping gripper cylinder (65) and the tape-wrapping rotary cylinder (66) to grab and rotate the product. The pressing cylinder (63) presses the first tape completely onto the structural adhesive on the B and F sides of the product. The unwinding motor (62) and the rewinding motor (61) work together to automatically remove the structural adhesive from the B and F sides of the product. Step 8: The product continues to move along the negative direction of the Y-axis on the Y-axis conveyor belt (42) and flows to the tape application station. Then, under the action of the transfer Z-axis transfer module (142) and the transfer gripper cylinder (143), the product is transferred to the fixture (16) of the X-axis linear motor (15) of the product film tearing input shaft (7). The tape pulling cylinder (94) pulls out the second tape. The tape feeding Z-axis module (92) descends and sticks half of the second tape to the product and suspends the other half. The tape feeding Z-axis module (92) cooperates with the first rolling cylinder (95) to roll the second tape onto the product. The cutting cylinder (96) cuts the second tape. The above processing of the six sides of the product is completed in sequence by the flipping of the product film tearing flipping mechanism (8) and the suction cup rotation drive module (19) of the fixture (16). Step 9: The X-axis linear motor (15) moves along the positive direction of the X-axis and moves the fixture (16) to the rolling station. Then the second rolling cylinder (101) descends and the roller (103) presses the second tape firmly. Step 10: The X-axis linear motor (15) moves along the positive direction of the X-axis and moves the fixture (16) to the second film-tearing station. The film-tearing gripper cylinder (112) clamps the second half of the tape that is suspended in the air. The film-tearing robot (111) moves in three dimensions in space to perform film-tearing. The waste film is thrown into the waste film collection box by the film-tearing robot (111). Step 11: Under the action of the Y-axis unloading transfer module (121) and the unloading gripper cylinder (123), the product is transferred to the X-axis unloading conveyor belt (122) and transported out along the positive direction of the X-axis.

Images