CN114308899A - Laser film removing equipment and method for lithium battery cell insulation protective film - Google Patents

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

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Publication number
CN114308899A
CN114308899A CN202111577934.8A CN202111577934A CN114308899A CN 114308899 A CN114308899 A CN 114308899A CN 202111577934 A CN202111577934 A CN 202111577934A CN 114308899 A CN114308899 A CN 114308899A
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CN
China
Prior art keywords
battery cell
lithium battery
protective film
adhesive tape
laser
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Pending
Application number
CN202111577934.8A
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Chinese (zh)
Inventor
赵裕兴
郭宏宇
徐海滨
李焕然
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Suzhou Delphi Laser Co Ltd
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Suzhou Delphi Laser Co Ltd
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Publication date
Application filed by Suzhou Delphi Laser Co Ltd filed Critical Suzhou Delphi Laser Co Ltd
Priority to CN202111577934.8A priority Critical patent/CN114308899A/en
Publication of CN114308899A publication Critical patent/CN114308899A/en
Priority to PCT/CN2022/095471 priority patent/WO2023115818A1/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/04—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by a combination of operations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Laser Beam Processing (AREA)
  • Primary Cells (AREA)

Abstract

The invention relates to laser film removing equipment and a laser film removing method for an insulation protective film of a lithium battery cell, which comprise the following steps: the product inlet and outlet unit is used for clamping and conveying the lithium battery cell to enter and exit; the modification mechanical arm unit is positioned on one side of the product inlet and outlet unit and used for continuously scanning the surface insulation protective film of the lithium battery cell to modify the lithium battery cell according to the set parameters; the automatic adhesive tape feeding system is positioned on one side of the product inlet and outlet unit and is used for providing adhesive tapes with fixed lengths; the film tearing manipulator unit is positioned on one side of the product inlet and outlet unit and used for adhering the adhesive tape provided by the adhesive tape automatic feeding system to one end of the modified insulating protective film, tearing off the insulating protective film in a manner of clamping the adhesive tape, and rotating the lithium battery cell; and the rolling mechanism is positioned on one side of the product inlet and outlet unit and used for compacting the adhesive tape adhered to the modified insulating protective film so as to firmly adhere the adhesive tape and the modified insulating protective film. The laser modifies the insulating protective film, and the insulating protective film is taken up together after the adhesive tape is bonded with the whole modified surface, so that the insulating protective film is efficiently stripped.

Description

Laser film removing equipment and method for lithium battery cell insulation protective film
Technical Field
The invention relates to laser film removing equipment and a laser film removing method for an insulation protective film of a lithium battery cell.
Background
With the progress of science and technology and the awakening of user environmental protection consciousness, the occupancy of new energy automobile is gradually increased, and the lithium battery is used as the power source of the new energy automobile, so that the yield is increased. For the security of guaranteeing lithium electricity electric core, can wrap up in the production manufacture in-process one deck insulating protective film, avoid electric core and metal aluminum hull direct contact to cause the short circuit. As shown in fig. 1, the appearance of the lithium battery cell is schematically illustrated, the surface of the lithium battery cell comprises an upper surface a, a front surface B, a lower surface C, a rear surface D, a right surface E and a left surface F, the upper surface a is opposite to the lower surface C, the front surface B is opposite to the rear surface D, the right surface E is opposite to the left surface F, the upper surface a is provided with a convex tab 11, the front surface B, the lower surface C and the rear surface D are covered by an insulating protective film 12 made of PET and acrylic acid, and the right surface E and the left surface F are covered by an insulating protective film 13 made of structural adhesive material. The direct contact removal mode such as manual or mechanical scraping can lead to the problems of low processing efficiency, more surface residues, damage to the aluminum material on the surface of the battery cell and the like.
In view of the fact that the current film removing method cannot meet the production requirements, research and development of efficient film removing equipment and technology of the lithium battery cell insulation protective film are urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides laser film removing equipment and a laser film removing method for an insulation protective film of a lithium battery cell.
The purpose of the invention is realized by the following technical scheme:
laser of lithium electricity electric core insulation protective film removes membrane equipment, characteristics are: comprises
The product inlet and outlet unit is used for clamping and conveying the lithium battery cell to enter and exit;
the modification mechanical arm unit is positioned on one side of the product inlet and outlet unit and used for continuously scanning the surface insulation protective film of the lithium battery cell to modify the lithium battery cell according to the set parameters;
the automatic adhesive tape feeding system is positioned on one side of the product inlet and outlet unit and is used for providing adhesive tapes with fixed lengths;
the film tearing manipulator unit is positioned on one side of the product inlet and outlet unit and used for adhering the adhesive tape provided by the adhesive tape automatic feeding system to one end of the modified insulating protective film, tearing off the insulating protective film in a manner of clamping the adhesive tape, and rotating the lithium battery cell;
and the rolling mechanism is positioned on one side of the product inlet and outlet unit and used for compacting the adhesive tape adhered to the modified insulating protective film so as to firmly adhere the adhesive tape and the modified insulating protective film.
Further, the laser film removing equipment for the lithium battery cell insulation protective film further comprises: and the waste film collecting mechanism is positioned on one side of the product inlet and outlet unit and used for collecting adhesive tapes and tearing off waste films.
Further, the laser film removing equipment for the lithium battery cell insulation protective film further comprises: and the discharging manipulator unit is positioned on one side of the product inlet and outlet unit and used for discharging the lithium battery cell of the insulating protective film.
Further, foretell lithium electricity electric core insulation protective film's laser removes membrane and equips, wherein, modified manipulator unit includes the robot, scans mirror and laser range finder that shake, scans mirror and laser range finder and install on the tool head, and the tool head is installed on the robot, and laser range finder is located the scanning mirror side that shakes, scans the mirror output laser beam that shakes and scans lithium electricity electric core surface insulation protective film.
Further, the laser film removing equipment for the lithium battery cell insulation protective film comprises a product inlet and outlet unit, wherein the product inlet and outlet unit comprises a linear motion platform and a jig which is positioned on the linear motion platform and used for positioning and clamping the lithium battery cell, and the linear motion platform can drive the jig to move along the X-axis direction;
the jig comprises a carrying platform, and an X-direction positioning block I, an X-direction positioning block II and a Y-direction positioning block which are positioned on the carrying platform, wherein a hollow structure for the product supporting plate to move up and down is arranged at the middle part of the carrying platform;
the X-direction positioning block I, the X-direction positioning block II and the Y-direction positioning block are located on the side of the hollow structure, X-direction clamping cylinders for X-direction clamping are arranged on the opposite sides of the X-direction positioning block I and the X-direction positioning block II, Y-direction clamping cylinders for Y-direction clamping are arranged on the opposite sides of the Y-direction positioning block, and the X-direction positioning and the Y-direction positioning and clamping can be performed on lithium battery cells on a product supporting plate;
the lateral part of microscope carrier is equipped with sharp cylinder, installs the scraper on the sharp cylinder, can drive the scraper and follow Z axial motion.
Further, the laser film removing equipment for the lithium battery cell insulation protective film comprises an automatic adhesive tape feeding system, a servo motor, an adhesive tape turntable, a pressing block, a cutter and a material stirring block, wherein the servo motor is in driving connection with the adhesive tape turntable;
a guide rail parallel to the axial direction of the adhesive tape rotating disc is arranged beside the adhesive tape rotating disc, a cutter bar is arranged on the guide rail, a cylinder is in driving connection with the cutter bar, and a cutter is arranged on the cutter bar;
the cylinder is vertically arranged beside the adhesive tape turntable, and the material stirring block is arranged on the cylinder and can drive the cylinder to vertically lift.
Further, the laser film removing equipment for the lithium battery cell insulation protective film further comprises a first guide shaft, a second guide shaft and a third guide shaft, wherein the first feeding shaft, the first guide shaft, the second guide shaft and the third guide shaft are arranged in parallel with the adhesive tape rotating disc to form a wheel set for adhesive tape conveying.
Further, the laser film removing equipment for the lithium battery cell insulation protective film comprises a film tearing manipulator unit, a film tearing manipulator unit and a film removing device, wherein the film tearing manipulator unit comprises an industrial robot, a rubber belt sucker, a first material clamping claw cylinder, a second material clamping claw cylinder, a clamping claw cylinder and a laser sensor, the rubber belt sucker, the first material clamping claw cylinder, the second material clamping claw cylinder, the clamping claw cylinder and the laser sensor are installed on a tool head, the tool head is installed on the industrial robot, the first material clamping claw cylinder and the second material clamping claw cylinder are distributed at two ends of the tool head, the first material clamping claw cylinder is provided with a first material clamping claw, the second material clamping claw cylinder is provided with a second material clamping claw, and the first material clamping claw and the second material clamping claw can be driven to move relatively to clamp the lithium battery cell;
the clamping jaw cylinder is arranged in the middle of the tool head, the adhesive tape sucker and the laser sensor are located on the left side and the right side of the tool head, the adhesive tape sucker sucks the adhesive tape with the fixed length, and the laser sensor emits laser to detect and judge whether a workpiece exists or not.
Further, foretell lithium electricity core insulation protective film's laser removes membrane and equips, wherein, rolling mechanism includes support, roll extrusion cylinder, spring, gyro wheel, and on the roll extrusion cylinder was fixed in the support, the support frame of spring passed through spring coupling on the roll extrusion cylinder, and roll extrusion cylinder control gyro wheel up-and-down motion.
Further, foretell lithium electricity core insulation protective film's laser removes membrane equipment, wherein, the waste film is collected the mechanism and is included linear motion mechanism, pressure claw and clamp plate, and on linear motion mechanism arranged the guide rail in, servo motor rather than the drive connection, the last backup pad that is equipped with of linear motion mechanism pressed the claw to pass through spring mounting in the backup pad, pressed the claw relative with the clamp plate, and linear motion mechanism drives and presses claw and clamp plate relative motion and be used for pressing the clamp to get the waste film.
Further, the laser film removing equipment for the lithium battery cell insulation protective film is characterized in that a waste film collecting box is arranged below the pressing claw.
Further, foretell lithium electricity core insulation protective film's laser removes membrane and equips, wherein, unloading manipulator unit includes unloading manipulator and unloading conveyer belt, and the unloading manipulator can follow its motion on arranging linear guide in, and linear guide passes through the support to be fixed in the frame, and the unloading conveyer belt is located the below of unloading manipulator motion trail.
The laser film removing method of the lithium battery cell insulation protective film comprises the following steps:
removing the insulation protective film on the front side B, the lower side C and the rear side D:
the product in-out unit clamps and conveys the lithium battery cell, the modification mechanical arm unit outputs laser beams to continuously scan the insulation protective film on the surface of the lithium battery cell to modify the lithium battery cell, and the insulation protective film is modified by the irradiation of the laser beams on the insulation protective film, so that the temperature of the insulation protective film is increased, the viscosity of the insulation protective film is reduced, and the insulation protective film is convenient to fall off; the energy density is greater than the modification threshold of the insulation protective film and less than the damage threshold of the aluminum material on the surface of the lithium battery cell, so that the whole insulation protective film is modified without damaging the surface of the lithium battery cell;
the modified insulation protective film is adhered with an adhesive tape and then is peeled off from the lithium battery cell in a tearing mode, an adhesive tape with a fixed length is provided by an adhesive tape automatic feeding system, the adhesive tape provided by the adhesive tape automatic feeding system is adhered to one end of the modified insulation protective film by a film tearing manipulator unit, the adhesive tape is adhered to one end of the modified insulation protective film, and a suspended part is reserved; compacting the adhesive tape adhered to the modified insulating protective film by a rolling mechanism to firmly bond the adhesive tape and the modified insulating protective film, and rolling the overlapped part of the adhesive tape and the insulating protective film by a roller to realize firm bonding of the adhesive tape and the insulating protective film; the film tearing mechanical hand unit tears off the insulating protective film in a mode of clamping the adhesive tape, and the clamping jaw cylinder clamps the suspended part of the adhesive tape and tears the adhesive tape to peel off the insulating protective film;
removing the insulation protective films on the right side E and the left side F:
the modification mechanical hand unit outputs laser beams to continuously scan the insulation protective film on the surface of the lithium battery cell to modify the lithium battery cell, the laser directly irradiates the insulation protective film, and the process is the same as that of removing the front side B, the lower side C and the rear side D; the insulating protective film is different in material, the allowable technological parameter interval is adaptively adjusted, and 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;
the insulating protective film is stripped from the lithium battery cell in a mechanical scraping mode, and the modified insulating protective film is removed by a scraper.
Furthermore, the laser film removing method of the lithium battery cell insulation protective film specifically comprises the following steps:
the method comprises the following steps: placing a lithium battery cell on a jig of a product inlet and outlet unit, keeping the front surface B of the jig upwards, positioning the lithium battery cell at a station 1, and positioning and clamping the lithium battery cell by utilizing an X-direction positioning block I, an X-direction positioning block II, a Y-direction positioning block, an X-direction clamping cylinder and a Y-direction clamping cylinder of the jig to complete feeding;
step two: the robot of the modified manipulator unit aligns the laser irradiation direction of the scanning galvanometer to the front surface B along the Z axis, and the laser range finder measures the distance from the scanning galvanometer to the surface of the lithium battery cell to realize the determination of the processing position and the automatic focusing; emitting laser beams according to set parameters, and irradiating the laser beams to the insulation protective film on the surface of the lithium battery cell to realize the modification of the insulation protective film;
step three: the product in-out unit moves the lithium battery cell to a station 2, at the moment, the automatic adhesive tape feeding system starts to work, the servo motor drives the adhesive tape rotating disc to rotate for an angle, and the adhesive tape with a certain length is pulled out from an adhesive tape roll of the feeding shaft due to the adhesive force between the adhesive tape and the adsorption claw on the adhesive tape rotating disc; then, the pressing block is driven by the air cylinder to extrude the pressing block and the adsorption claw on the adhesive tape rotating disc, so that the adhesive tape is adhered to the adsorption claw; then, driving a cutter bar to move through a cylinder, feeding a cutter arranged on the cutter bar along a guide rail, and cutting the adhesive tape into sheets; the material shifting block is jacked upwards by the air cylinder, so that the cut adhesive tape is separated from the adsorption claw;
step four: the film tearing mechanical arm unit sends laser through a laser sensor to judge whether a workpiece exists at the position of the station 2, the workpiece is identified, then the working head is moved to the position above an automatic adhesive tape feeding system, an adhesive tape sucker adsorbs the stripped adhesive tape, then the adhesive tape is moved to the position above the lithium battery cell, the adhesive tape is adhered to one end of the lithium battery cell, and meanwhile, a suspended part is reserved;
step five: the product in-out unit moves the lithium battery cell to a station 3, a rolling cylinder of a rolling mechanism drives a roller to descend, then the product in-out unit controls the lithium battery cell to reciprocate under the roller, and after the adhesive tape is firmly bonded with the modified surface insulation protective film of the lithium battery cell, the roller ascends;
step six: the product in-out unit moves the lithium battery cell to a station 2, the film tearing manipulator unit moves the working head to the position above the lithium battery cell, the clamping jaw cylinder clamps and pulls the suspended part of the adhesive tape, and the adhesive tape drives the whole front surface B to remove the insulating protective film;
step seven: the film tearing manipulator unit moves the adhesive tape and the torn waste film to the waste film collecting mechanism, the servo motor drives the linear motion mechanism to move linearly and is guided by the guide rail, the pressing claw and the pressing plate are extruded, clamping of the waste film is achieved, and the waste film is adhered to the pressing plate;
step eight: the film tearing mechanical arm unit moves the working head to the position of a lithium battery cell, the material clamping claw I and the material clamping claw II are driven to move relatively through the material clamping claw cylinder I and the material clamping claw cylinder II to grab the lithium battery cell, then the lithium battery cell is clockwise rotated by 90 degrees around the Y axis and placed on the jig again, and at the moment, the lower surface C of the lithium battery cell faces upwards;
step nine: an X-direction positioning block I, an X-direction positioning block II, a Y-direction positioning block, an X-direction clamping cylinder and a Y-direction clamping cylinder of the jig are used for positioning and clamping the lithium battery cell, and a product inlet and outlet unit moves the lithium battery cell to a station 1;
repeating the first step to the ninth step to finish the removal of the insulation protective films on the lower surface C and the rear surface D of the lithium battery cell;
step ten: after the insulation protective film on the back surface D is removed, the product in-out unit moves the lithium battery cell to the station 1 again, the combination of the linear cylinder and the rotary cylinder of the jig enables the lithium battery cell fixed on the product supporting plate by means of self gravity to move upwards along the Z axis in a linear mode and rotate 90 degrees clockwise around the Z axis, and the right surface E faces the negative direction of the X axis; the modification mechanical arm unit moves the working head to the X-axis negative direction of the jig, and emits laser beams according to set parameters to modify the insulation protective film;
step eleven: after modification is finished, the straight-line cylinder of the jig drives the scraper to vertically move upwards, and the scraper is used for removing the modified insulating protective film on the right side E;
step twelve: a rotary cylinder of the jig rotates the lithium battery cell anticlockwise for 180 degrees around the Z axis, so that the left surface F faces the negative direction of the X axis;
repeating the tenth step to the eleventh step to finish the removal of the F insulation protective film on the left surface of the lithium battery cell;
step thirteen: after the insulation protective film on the surface of the lithium battery cell is completely removed, a rotary cylinder of the jig rotates the lithium battery cell clockwise by 90 degrees around a Z axis, a product supporting plate is lowered by a linear cylinder, and then a product in-out unit moves the lithium battery cell to a station 4; the discharging manipulator of the discharging manipulator unit grabs the lithium battery cell and places the lithium battery cell on the discharging conveyor belt.
Further, the laser film removing method of the lithium battery cell insulation protective film comprises the steps that pulse laser with the wavelength of 500-1100 nm, the laser power of more than 50w and the pulse width of 300 fs-1 us is output by a pulse laser, a rectangular large light spot is formed through shaping, the size of the light spot is 1.5 multiplied by 0.5mm, and the energy distribution is uniform during laser scanning; the scanning galvanometer controls the movement of light spots, can deflect left and right, up and down, and controls the change of deflection angles of the laser on the left and right, up and down; focusing laser by adopting a laser range finder; and controlling the power, the scanning times, the scanning speed and the defocusing amount process parameters of the laser, so that the energy density is greater than the modification threshold of the insulation protective film and less than the damage threshold of the surface aluminum material of the lithium battery cell.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and is embodied in the following aspects:
firstly, the invention skillfully utilizes the transmissivity of the insulating protective film to laser with certain wavelength, so that the laser directly acts on the pressure-sensitive adhesive layer, the pressure-sensitive adhesive is heated to be modified, and finally the viscosity is reduced, thereby greatly reducing the removal difficulty of the insulating protective film; the insulating protective film is modified by laser by regulating and controlling process parameters without damaging the aluminum shell on the surface of the battery cell; the surface layer material of the insulation protective film is not physically damaged by melting, gasification and the like, the temperature rise of the surface of the lithium battery cell is less than 70 ℃, and the aluminum material of the lithium battery cell is not damaged;
secondly, the modified insulating protective film is taken up together by using the adhesive tape to bond the whole surface, namely, an automatic adhesive tape feeding system provides the adhesive tape, a mechanical arm pastes the adhesive tape, a rolling mechanism compacts the adhesive tape, the mechanical arm tears the adhesive tape, a waste film collecting mechanism collects the complete flow of the waste film, and the modified insulating protective film is efficiently stripped from the surface of the lithium battery cell;
the modified manipulator unit can quickly and spatially select the processing surface of the lithium battery cell, so that the right side E and the left side F of the lithium battery cell are efficiently modified;
the multifunctional jig realizes the functions of clamping, positioning and rotating the lithium battery cell and mechanical scraping, and the film tearing and blanking manipulator realizes the functions of adsorbing an adhesive tape, tearing off an insulating protective film, transferring a waste film, rotating the lithium battery cell and the like, so that the multifunctional jig is multifunctional and saves the cost;
and the rest processes are all automatic operation except the manual feeding process, so that compared with the traditional manual scraping mode, the labor resources and the production cost are greatly saved, and the economic benefit is remarkable.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1: the appearance schematic diagram of the lithium battery cell;
FIG. 2: the structure of the laser film removing equipment is shown schematically;
FIG. 3: a station schematic diagram;
FIG. 4: the structural schematic diagram of the modified manipulator unit;
FIG. 5: the structure schematic diagram of the product inlet and outlet unit;
FIG. 6: one-axis measuring schematic diagram of the jig;
FIG. 7: another schematic axial view of the jig;
FIG. 8: an axial measuring schematic diagram of the automatic adhesive tape feeding system;
FIG. 9: another schematic axial view of the automatic adhesive tape feeding system;
FIG. 10: a structural schematic diagram of the film tearing manipulator unit;
FIG. 11: the structural schematic diagram of the rolling mechanism;
FIG. 12: the structural schematic diagram of the waste film collecting mechanism;
FIG. 13: the structural schematic diagram of the blanking manipulator unit;
FIG. 14: schematic representation of laser modification of front side B, bottom side C, back side D;
FIG. 15: a schematic diagram of a film tearing manipulator unit sticking an adhesive tape;
FIG. 16: a schematic view of rolling;
FIG. 17: a film tearing manipulator unit tears the adhesive tape;
FIG. 18: and (4) removing the insulating protective films on the right side E and the left side F.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the directional terms and the sequence terms, etc. are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 2-3, the laser film removing equipment for the lithium battery cell insulation protective film comprises:
a product inlet and outlet unit 24 for clamping and conveying the lithium battery cell 23;
the modification manipulator unit 25 is positioned on one side of the product inlet and outlet unit 24 and used for continuously scanning the insulation protective film on the surface of the lithium battery cell to modify the lithium battery cell according to the set parameters;
an automatic tape feeding system 22 for supplying a fixed length of tape on one side of the product inlet and outlet unit 24;
a film tearing manipulator unit 26, which is located on one side of the product in-out unit 24 and is used for adhering the adhesive tape provided by the adhesive tape automatic feeding system 22 to one end of the modified insulation protective film, tearing off the insulation protective film in a manner of clamping the adhesive tape, and rotating the lithium battery cell;
a rolling mechanism 28 located on one side of the product inlet and outlet unit 24 for compacting the adhesive tape adhered to the modified insulating protective film to firmly adhere the adhesive tape to the modified insulating protective film;
a waste film collecting mechanism 21 located on one side of the product inlet and outlet unit 24 for collecting adhesive tape and tearing off waste film;
a discharging manipulator unit 27 which is positioned on one side of the product inlet and outlet unit 24 and used for discharging the lithium battery cell of which the insulation protective film is removed;
the laser and the control system are arranged on the frame 29, the laser wavelength range is 500-1100 nm, the laser power range is more than 50w, the pulse width range is 300 fs-1 us, and the shaped rectangular light spot with the size of 1.5 multiplied by 0.5mm is used.
In the film removing process, the lithium battery cell mainly runs in four stations, and the positions of the stations are shown in fig. 3.
In order to improve the processing efficiency, two sets of product inlet and outlet units can be arranged to operate simultaneously.
As shown in fig. 4, the modified manipulator unit 25 includes a robot 44, a scanning galvanometer 41, a laser range finder 42, and a dust collecting device 43, the scanning galvanometer 41, the laser range finder 42, and the dust collecting device 43 are mounted on a tool head, the tool head is mounted on the robot 44, the robot realizes six-degree-of-freedom movement of the tool head in space, the laser range finder 42 is located at a side of the scanning galvanometer 41 and is used for positioning and auto-focusing, laser emitted by the laser optically propagates to the scanning galvanometer, and a laser beam 411 output by the scanning galvanometer realizes rapid irradiation of an insulating protective film on the surface of a lithium battery cell; the dust collector 43 is used to collect fine debris generated during the modification process.
As shown in fig. 5, the product in-and-out unit 24 includes a linear motion platform 51 and a jig 52 located thereon for positioning and clamping the lithium battery cell 23, and the linear motion platform 51 can drive the jig 52 to move along the X-axis direction;
as shown in fig. 6 to 7, the jig 52 includes a carrier, and a first X-direction positioning block 64, a second X-direction positioning block 68, and a second Y-direction positioning block 67 located thereon, a hollow structure for allowing the product supporting plate 65 to move up and down is provided at the middle part of the carrier, the product supporting plate 65 is connected to a rotating shaft of a rotary cylinder 71, and the rotary cylinder 71 is installed on a linear cylinder 72 and can drive the product supporting plate 65 to move up and down and rotate; the Z-axis direction movement and the rotation around the Z axis of the lithium battery cell are realized, so that the lithium battery cell does not interfere with components such as a positioning block and the like during rotation;
the X-direction positioning block I64, the X-direction positioning block II 68 and the Y-direction positioning block 67 are located on the side of the hollow structure, an X-direction clamping cylinder 69 for clamping in the X direction is arranged on the opposite side of the X-direction positioning block I64 and the X-direction positioning block II 68, a Y-direction clamping cylinder 66 for clamping in the Y direction is arranged on the opposite side of the Y-direction positioning block 67, and the X-direction and Y-direction positioning and clamping can be performed on a lithium battery cell on the product supporting plate 65;
the side of the carrying platform is provided with a linear air cylinder 63, a scraper 62 is arranged on the linear air cylinder 63, the scraper 62 can be driven to move along the Z-axis, and the waste film collecting box 61 is arranged beside the scraper 62.
As shown in fig. 8 to 9, the automatic tape feeding system 22 includes a feeding shaft 87, a first guide shaft 84, a second guide shaft 85, a third guide shaft 86, a tape turntable 83, a pressing block 92, a cutter 95 and a material stirring block 98, the feeding shaft 87, the first guide shaft 84, the second guide shaft 85, the third guide shaft 86 and the tape turntable 83 are arranged in parallel to form a tape conveying wheel set, the guide shafts are used for guiding and tensioning the tape, a servo motor 81 is in driving connection with the tape turntable 83 through a coupler 82, a tape roll 88 is arranged on the feeding shaft 87, five adsorption claws 99 are arranged on the tape turntable 83, the adsorption claws leave intervals for the cutter to cut the tape to avoid interference, the pressing block 92 is arranged beside the tape turntable 83, the pressing block 92 is arranged on an air cylinder 93, and the air cylinder 93 can drive the pressing block 92 to press the adsorption claws 99;
a guide rail 94 parallel to the axial direction of the adhesive tape turntable 83 is arranged beside the adhesive tape turntable, a cutter bar 96 is arranged on the guide rail 94, an air cylinder 97 is in driving connection with the cutter bar 96, a cutter 95 is arranged on the cutter bar 96, and the air cylinder controls the cutter to cut the adhesive tape;
the cylinder 91 is vertically arranged beside the adhesive tape turntable 83, the material stirring block 98 is arranged on the cylinder 91 and can drive the vertical lifting motion of the cylinder, the cylinder controls the material stirring block to jack up the cut adhesive tape, the adhesive force of the adhesive tape and the adsorption claw is reduced, and the film tearing manipulator is convenient to take away the adhesive tape.
As shown in fig. 10, the film tearing manipulator unit 26 includes an industrial robot 101, a tape chuck 104, a first material clamping claw cylinder 103, a second material clamping claw cylinder 108, a clamping claw cylinder 106 and a laser sensor 107, where the tape chuck 104, the first material clamping claw cylinder 103, the second material clamping claw cylinder 108, the clamping claw cylinder 106 and the laser sensor 107 are mounted on a tool head, the tool head is mounted on the industrial robot 101, the industrial robot realizes six-degree-of-freedom movement of the tool head in space, the first material clamping claw cylinder 103 and the second material clamping claw cylinder 108 are distributed at two ends of the tool head, the first material clamping claw cylinder 103 is mounted on the first material clamping claw 102, the second material clamping claw cylinder 108 is mounted on the second material clamping claw cylinder 109, and the first material clamping claw 102 and the second material clamping claw 109 can be driven to move relatively to clamp the lithium battery cell;
the clamping jaw air cylinder 106 is arranged in the middle of the tool head, the adhesive tape suction cup 104 and the laser sensor 107 are located on the left side and the right side of the tool head, the adhesive tape suction cup 104 sucks the fixed-length adhesive tape 105, and the laser sensor 107 emits laser 1071 to judge whether the laser 1071 exists or not.
As shown in fig. 11, the rolling mechanism 28 includes a bracket 111, a rolling cylinder 114, a spring 113, and a roller 112, the rolling cylinder 114 is fixed on the bracket 111, a support frame of the spring 113 is connected to the rolling cylinder 114 through the spring 113, the rolling cylinder 114 controls the roller 112 to move up and down in the Z-axis direction, the spring has a buffering function, and the roller rolls the adhesive tape. In the rolling process, the product inlet and outlet unit 24 drives the lithium battery cell to reciprocate in the X-axis direction, so that the adhesive tape is adhered to the insulating protective film.
As shown in fig. 12, the waste film collecting mechanism 21 includes a linear motion mechanism 128, a pressing claw 123, a pressing plate 121 and a waste film collecting box 126, the linear motion mechanism 128 is disposed on a guide rail 125, a servo motor 129 is drivingly connected to the linear motion mechanism 128, a supporting plate 127 is disposed on the linear motion mechanism 128, the pressing claw 123 is mounted on the supporting plate 127 through a spring 124, the pressing claw 123 is opposite to the pressing plate 121, the linear motion mechanism 128 drives the pressing claw 123 and the pressing plate 121 to move relatively to clamp the waste film 122, the waste film collecting box 126 is disposed below the pressing claw 123, and the dropped waste film is collected. The linear motion of pressing the claw and the cooperation of briquetting realize getting of waste film to set up the spring and cushion.
As shown in fig. 13, the discharging manipulator unit 27 includes a discharging manipulator 132 and a discharging conveyor 133, the discharging manipulator 132 is disposed on a linear guide 134 and can move along the linear guide 134, the linear guide 134 is fixed on the rack 29 through a bracket 131, the discharging conveyor 133 is located below the movement track of the discharging manipulator 132, and the discharging conveyor 133 sends out the lithium battery cells after the film removal.
The invention relates to a laser film removing method of an insulation protective film of a lithium battery cell, which comprises the following steps of firstly removing the insulation protective films of a front side B, a lower side C and a rear side D:
the product in-out unit 24 is used for clamping and conveying the lithium battery cell 23, the modification mechanical arm unit 25 is used for emitting laser beams to continuously scan the insulation protective film on the surface of the lithium battery cell to modify the lithium battery cell, and the insulation protective film is modified by means of irradiation of the laser beams, so that the temperature of the insulation protective film is increased, the viscosity of the insulation protective film is reduced, and the insulation protective film is convenient to fall off; the pulse laser outputs pulse laser with the wavelength of 500-1100 nm, the laser power of more than 50w and the pulse width of 300 fs-1 us, and the shaped rectangular large light spot has the size of 1.5 multiplied by 0.5mm, so that the energy distribution is uniform during laser scanning, the working efficiency is improved, and the working hours are shortened; the scanning galvanometer controls the movement of light spots and deflects left and right and up and down according to instructions, so that the deflection angle change of the laser on the left and right and up and down is controlled; the laser range finder is adopted to realize the automatic focusing of laser; controlling the power, scanning times, scanning speed and defocusing amount process parameters of the laser, so that the energy density is greater than the modification threshold of the insulation protective film and less than the damage threshold of the surface aluminum material of the lithium battery cell, and finally the whole insulation protective film is modified without damaging the surface of the lithium battery cell;
the modified insulation protective film is adhered with an adhesive tape and then is peeled off from the lithium battery cell in a tearing mode, the adhesive tape with the fixed length is provided by the adhesive tape automatic feeding system 22, the adhesive tape provided by the adhesive tape automatic feeding system 22 is adhered to one end of the modified insulation protective film by the film tearing manipulator unit 26, the adhesive tape is adhered to one end of the modified insulation protective film, and a suspended part is left; the rolling mechanism 28 is used for compacting the adhesive tape adhered to the modified insulating protective film to firmly bond the adhesive tape and the modified insulating protective film, and a roller is used for rolling the overlapped part of the adhesive tape and the insulating protective film to realize the firm bonding of the adhesive tape and the insulating protective film; the film tearing mechanical hand unit 26 tears off the insulating protective film in a mode of clamping the adhesive tape, clamps the suspended part of the adhesive tape by using the clamping jaw cylinder and tears the adhesive tape, so that the insulating protective film is stripped, and meanwhile, the waste film is collected after stripping;
then, removing the insulation protective films on the right side E and the left side F:
the modification mechanical hand unit 25 outputs laser beams to continuously scan the insulation protective film on the surface of the lithium battery cell to modify the lithium battery cell, the laser directly irradiates the insulation protective film, and the process is the same as that of removing the front side B, the lower side C and the rear side D except that the working positions of the scanning galvanometers are different; the insulating protective film is different in material, the allowable process parameter intervals are different, and the criterion 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 is met;
stripping the insulation protective film from the lithium battery cell in a mechanical scraping manner, and directly removing the modified insulation protective film by adopting a linear cylinder to control a scraper; meanwhile, a waste film collecting box is arranged to collect the dropped waste films;
and (4) discharging through a discharging manipulator after all the insulation protective films are removed.
The specific process steps are as follows:
the method comprises the following steps: placing the lithium battery cell 23 on a jig 52 of the product in-out unit 24, keeping the front surface B of the lithium battery cell 23 upward, positioning and clamping the lithium battery cell 23 at the station 1 by using an X-direction positioning block I64, an X-direction positioning block II 68, a Y-direction positioning block 67, an X-direction clamping cylinder 69 and a Y-direction clamping cylinder 66 of the jig 52, and finishing feeding;
step two: as shown in fig. 14, the robot 44 of the manipulator unit 25 aligns the laser irradiation direction of the scanning galvanometer 41 to the front surface B along the Z axis, and the laser distance meter 42 measures the distance from the scanning galvanometer 41 to the surface of the lithium battery cell 23 to determine the processing position and perform auto-focusing; emitting a laser beam 411 according to set parameters, and irradiating the laser beam to the insulating protective film 12 on the surface of the lithium battery cell to realize the modification of the insulating protective film 12;
step three: the product in-out unit 24 moves the lithium battery cell 23 to the station 2, at this time, the automatic adhesive tape feeding system 22 starts to work, the servo motor 81 rotates the adhesive tape rotating disc 83 by an angle through the coupling 82, the adhesive tape and the adsorption claw 99 on the adhesive tape rotating disc 83 have adhesive force, the adhesive tape with a certain length is pulled out from the adhesive tape roll 88 of the feeding shaft 87, and the guide shaft III 86, the guide shaft II 85 and the guide shaft I84 guide and tension the adhesive tape, so that the part of the adhesive tape pulled out each time is fixed in length; then, the pressing block 92 is driven by the air cylinder 93 to extrude the adsorption claw 99 on the adhesive tape turntable 83, so that the adhesive tape is adhered to the adsorption claw 99; then, the cutter bar 96 is driven to move through the air cylinder 97, the cutter 95 arranged on the cutter bar 96 feeds along the guide rail 94, and the adhesive tape is cut into sheets with the length of 85 mm; the cylinder 91 jacks up the material shifting block 98 to separate the cut adhesive tape from the adsorption claw 99;
step four: the film tearing manipulator unit 26 sends laser 1071 through the laser sensor 107 to judge whether a workpiece exists at the station 2, after the workpiece is identified, the working head is moved to the upper part of the automatic adhesive tape feeding system 22, and the peeled adhesive tape 105 is absorbed by the adhesive tape sucking disc 104, as shown in fig. 15; then moving the lithium battery cell 23 to the upper side, adhering the adhesive tape 105 to one end of the lithium battery cell 23, and reserving a suspended part not smaller than 30 mm;
step five: the product in-and-out unit 24 moves the lithium battery cell 23 to the working position 3, the rolling air cylinder 114 of the rolling mechanism 28 drives the roller 112 to descend, and then the product in-and-out unit 24 controls the lithium battery cell 23 to reciprocate under the roller 112, wherein the rolling position is shown in fig. 16; after the adhesive tape 105 is firmly bonded with the modified lithium battery cell surface insulation protective film 12, the roller 112 is lifted;
step six: the product in-out unit 24 moves the lithium battery cell 23 to the working position 2, and the film tearing manipulator unit 26 moves the working head above the lithium battery cell 23, as shown in fig. 17; the clamping jaw cylinder 106 clamps the suspended part of the adhesive tape 105 and pulls the suspended part, and the adhesive tape drives the whole insulation protective film on the front surface B to be removed;
step seven: the film tearing manipulator unit 26 moves the adhesive tape and the torn waste film to the waste film collecting mechanism 21, the servo motor 129 drives the linear motion mechanism 128 to perform linear motion, the linear motion mechanism is guided by the guide rail 125, the pressing claw 123 extrudes the pressing plate 121, the waste film 122 is clamped, and the waste film 122 is either adhered to the pressing plate 121 or falls into the waste film collecting box 126;
step eight: the film tearing manipulator unit 26 moves the working head to the position of the lithium battery cell 23, drives the first clamping claw 102 and the second clamping claw 109 to move relatively through the first clamping claw cylinder 103 and the second clamping claw cylinder 108, so as to grab the lithium battery cell 23, then rotates the lithium battery cell 23 clockwise by 90 degrees around the Y axis and places the lithium battery cell on the jig 52 again, and at the moment, the lower surface C of the lithium battery cell 23 faces upwards;
step nine: the lithium battery cell 23 is positioned and clamped by an X-direction positioning block I64, an X-direction positioning block II 68, a Y-direction positioning block 67, an X-direction clamping cylinder 69 and a Y-direction clamping cylinder 66 of the jig 52, and the lithium battery cell 23 is moved to the station 1 by the product in-out unit 24;
repeating the first step to the ninth step to finish the removal of the insulation protective films on the lower surface C and the rear surface D of the lithium battery cell 23;
step ten: after the insulation protective film on the back surface D is removed, the product in-out unit 24 moves the lithium battery cell 23 to the station 1 again, the combination of the linear cylinder 72 and the rotary cylinder 71 of the jig 52 moves the lithium battery cell 23 fixed on the product supporting plate 65 by the gravity of the lithium battery cell upwards along the Z axis linearly and rotates 90 degrees clockwise around the Z axis, so that the right surface E faces the negative direction of the X axis; as shown in fig. 18, the modifying manipulator unit 25 moves the working head to the X-axis negative direction of the jig 52, and emits a laser beam 411 according to the set parameters to modify the insulating protective film 13;
step eleven: after the modification is finished, the straight-line cylinder 63 of the jig 52 drives the scraper 62 to move vertically upwards, and the modified insulating protective film 13 on the right side E is removed by the scraper;
step twelve: the rotary cylinder 71 of the jig 52 rotates the lithium battery cell 23 counterclockwise by 180 degrees around the Z axis, so that the left surface F faces the X axis negative direction;
repeating the tenth step to the eleventh step to finish the removal of the F insulation protective film 12 on the left surface of the lithium battery cell 23;
step thirteen: after the insulating protective film on the surface of the lithium battery cell is completely removed, the rotary cylinder 71 of the jig 52 rotates the lithium battery cell 23 clockwise by 90 degrees around the Z axis, the linear cylinder 72 lowers the product supporting plate 65, and then the product in-out unit 24 moves the lithium battery cell 23 to the station 4; the discharging manipulator 132 of the discharging manipulator unit 27 grabs the lithium battery cell 23 and places the lithium battery cell on the discharging conveyor belt 133.
In conclusion, the invention ingeniously utilizes the transmissivity of the insulating protective film to laser with certain wavelength, so that the laser directly acts on the pressure-sensitive adhesive layer, the pressure-sensitive adhesive is heated to be modified, finally the viscosity is reduced, and the difficulty in removing the insulating protective film is greatly reduced; the insulating protective film is modified by laser by regulating and controlling process parameters without damaging the aluminum shell on the surface of the battery cell; the surface layer material of the insulation protective film is not physically damaged by melting, gasification and the like, the temperature rise of the surface of the lithium battery cell is less than 70 ℃, and the aluminum material of the lithium battery cell is not damaged;
the modified insulating protective film is taken up together by using the adhesive tape to bond the whole surface, namely, the adhesive tape automatic feeding system provides an adhesive tape, a mechanical arm pastes the adhesive tape, a rolling mechanism compacts the adhesive tape, the mechanical arm tears the adhesive tape, a waste film collecting mechanism collects the complete flow of the waste film, and the modified insulating protective film is efficiently stripped from the surface of the lithium battery cell;
the modification manipulator unit can quickly and spatially select the processing surface of the lithium battery cell, so that the right side E and the left side F of the lithium battery cell are efficiently modified;
the multifunctional jig realizes the clamping, positioning and rotating of the lithium battery cell and the mechanical scraping shovel, and the film tearing and blanking manipulator realizes the adsorption of an adhesive tape, the tearing of an insulating protective film, the transfer of a waste film, the rotation of the lithium battery cell and other functions, so that the multifunctional jig is multifunctional and saves the cost;
except that the material loading process is artifical, all other processes are automatic operation, compare in traditional artifical mode of striking off, greatly save manpower resources and manufacturing cost, and economic benefits is showing.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and shall be covered by the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims (15)

1. Laser of lithium electricity core insulation protective film removes membrane equipment, its characterized in that: comprises
A product inlet and outlet unit (24) for clamping and conveying the lithium battery cell (23) in and out;
the modification manipulator unit (25) is positioned on one side of the product inlet and outlet unit (24) and is used for continuously scanning the insulation protective film on the surface of the lithium battery cell to modify the insulation protective film according to set parameters;
an automatic tape feeding system (22) for supplying a fixed length of tape on one side of the product inlet and outlet unit (24);
the film tearing manipulator unit (26) is positioned on one side of the product in-out unit (24) and is used for adhering the adhesive tape provided by the adhesive tape automatic feeding system (22) to one end of the modified insulating protective film, tearing off the insulating protective film in a manner of clamping the adhesive tape, and rotating the lithium battery cell;
and the rolling mechanism (28) is positioned on one side of the product inlet and outlet unit (24) and is used for compacting the adhesive tape adhered to the modified insulating protective film so as to firmly adhere the adhesive tape to the modified insulating protective film.
2. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 1, characterized in that: further comprising: and a waste film collecting mechanism (21) which is positioned at one side of the product inlet and outlet unit (24) and is used for collecting adhesive tapes and tearing off waste films.
3. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 1, characterized in that: further comprising: and the discharging manipulator unit (27) is positioned on one side of the product inlet and outlet unit (24) and is used for discharging the lithium battery cell after the insulating protective film is removed.
4. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 1, characterized in that: modified manipulator unit (25) include robot (44), scanning galvanometer (41) and laser range finder (42), and scanning galvanometer (41) and laser range finder (42) are installed on the tool head, and the tool head is installed on robot (44), and laser range finder (42) are located scanning galvanometer (41) side, and scanning galvanometer output laser beam (411) scans lithium electricity core surface insulation protecting film.
5. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 1, characterized in that: the product in-out unit (24) comprises a linear motion platform (51) and a jig (52) which is positioned on the linear motion platform and used for positioning and clamping the lithium battery cell (23), and the linear motion platform (51) can drive the jig (52) to move along the X-axis direction;
the jig (52) comprises a carrying platform, and an X-direction positioning block I (64), an X-direction positioning block II (68) and a Y-direction positioning block (67) which are positioned on the carrying platform, wherein a hollow structure for enabling the product supporting plate (65) to move up and down is arranged in the middle of the carrying platform, the product supporting plate (65) is connected to a rotating shaft of a rotating cylinder (71), and the rotating cylinder (71) is arranged on a linear cylinder (72) and can drive the product supporting plate (65) to move up and down and rotate;
the X-direction positioning block I (64), the X-direction positioning block II (68) and the Y-direction positioning block (67) are located on the side of the hollowed-out structure, an X-direction clamping cylinder (69) for clamping in the X direction is arranged on the opposite side of the X-direction positioning block I (64) and the X-direction positioning block II (68), a Y-direction clamping cylinder (66) for clamping in the Y direction is arranged on the opposite side of the Y-direction positioning block (67), and the X-direction positioning block I and the Y-direction positioning block II can position and clamp the lithium battery cell on the product supporting plate (65) in the X direction and the Y direction;
a linear air cylinder (63) is arranged on the side portion of the carrying platform, a scraper (62) is installed on the linear air cylinder (63), and the scraper (62) can be driven to move along the Z axial direction.
6. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 1, characterized in that: the automatic adhesive tape feeding system (22) comprises a feeding shaft (87), an adhesive tape rotating disc (83), a pressing block (92), a cutter (95) and a material stirring block (98), a servo motor (81) is in driving connection with the adhesive tape rotating disc (83), an adhesive tape roll (88) is arranged on the feeding shaft (87), a plurality of adsorption claws (99) are arranged on the adhesive tape rotating disc (83), the pressing block (92) is arranged beside the adhesive tape rotating disc (83), the pressing block (92) is installed on an air cylinder (93), and the air cylinder (93) can drive the pressing block (92) to press the adsorption claws (99);
a guide rail (94) which is parallel to the axial direction of the adhesive tape turntable (83) is arranged beside the adhesive tape turntable, a cutter bar (96) is arranged on the guide rail (94), an air cylinder (97) is in driving connection with the cutter bar (96), and a cutter (95) is arranged on the cutter bar (96);
an air cylinder (91) is vertically arranged beside the adhesive tape rotating disc (83), and a material stirring block (98) is arranged on the air cylinder (91) and can be driven to vertically lift.
7. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 6, characterized in that: the rubber belt conveying device further comprises a first guide shaft (84), a second guide shaft (85), a third guide shaft (86), and a feeding shaft (87), the first guide shaft (84), the second guide shaft (85), the third guide shaft (86) and the rubber belt turntable (83) are arranged in parallel to form a rubber belt conveying wheel set.
8. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 1, characterized in that: the film tearing manipulator unit (26) comprises an industrial robot (101), an adhesive tape sucker (104), a material clamping claw cylinder I (103), a material clamping claw cylinder II (108), a clamping claw cylinder 106 and a laser sensor (107), wherein the adhesive tape sucker (104), the material clamping claw cylinder I (103), the material clamping claw cylinder II (108), the clamping claw cylinder (106) and the laser sensor (107) are mounted on a tool head, the tool head is mounted on the industrial robot (101), the material clamping claw cylinder I (103) and the material clamping claw cylinder II (108) are distributed at two ends of the tool head, the material clamping claw cylinder I (103) is provided with the material clamping claw I (102), the material clamping claw cylinder II (108) is provided with the material clamping claw II (109), and the material clamping claw I (102) and the material clamping claw II (109) can be driven to move relatively to clamp the lithium battery cell;
clamping jaw cylinder (106) arranges in the middle of the tool head, and sticky tape sucking disc (104) and laser sensor (107) are located its left and right sides, and sticky tape sucking disc (104) absorbs fixed length sticky tape (105), and laser sensor (107) transmission laser (1071) are used for detecting and judge whether there is the work piece.
9. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 1, characterized in that: the rolling mechanism (28) comprises a support (111), a rolling air cylinder (114), a spring (113) and a roller (112), the rolling air cylinder (114) is fixed on the support (111), a support frame of the spring (113) is connected to the rolling air cylinder (114) through the spring (113), and the rolling air cylinder (114) controls the roller (112) to move up and down.
10. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 2, characterized in that: the waste film collecting mechanism (21) comprises a linear motion mechanism (128), a pressing claw (123) and a pressing plate (121), the linear motion mechanism (128) is arranged on a guide rail (125), a servo motor (129) is in driving connection with the linear motion mechanism, a supporting plate (127) is arranged on the linear motion mechanism (128), the pressing claw (123) is installed on the supporting plate (127) through a spring (124), the pressing claw (123) is opposite to the pressing plate (121), and the linear motion mechanism (128) drives the pressing claw (123) and the pressing plate (121) to move relatively so as to clamp the waste film (122).
11. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 10, characterized in that: a waste film collecting box (126) is arranged below the pressing claw (123).
12. The laser film removing equipment for the lithium battery cell insulation protective film according to claim 3, characterized in that: the blanking manipulator unit (27) comprises a blanking manipulator (132) and a blanking conveyor belt (133), the blanking manipulator (132) is arranged on the linear guide rail (134) and can move along the linear guide rail (134), the linear guide rail (134) is fixed on the rack (29) through a support (131), and the blanking conveyor belt (133) is located below the movement track of the blanking manipulator (132).
13. The laser film removing method for realizing the lithium battery cell insulation protective film by using the device of claim 1, which is characterized by comprising the following steps: the method comprises the following steps:
removing the insulation protective film on the front side B, the lower side C and the rear side D:
the product in-out unit (24) clamps and conveys the lithium battery cell (23), the modification manipulator unit (25) outputs laser beams to continuously scan the insulation protective film on the surface of the lithium battery cell to modify the lithium battery cell, and the insulation protective film is modified by the way of irradiating the insulation protective film by laser, so that the temperature of the insulation protective film is increased, the viscosity of the insulation protective film is reduced, and the lithium battery cell is convenient to fall off; the energy density is greater than the modification threshold of the insulation protective film and less than the damage threshold of the aluminum material on the surface of the lithium battery cell, so that the whole insulation protective film is modified without damaging the surface of the lithium battery cell;
the modified insulation protective film is adhered with an adhesive tape and then is peeled off from the lithium battery cell in a tearing mode, an adhesive tape with a fixed length is provided by an adhesive tape automatic feeding system (22), the adhesive tape provided by the adhesive tape automatic feeding system (22) is adhered to one end of the modified insulation protective film by a film tearing manipulator unit (26), the adhesive tape is adhered to one end of the modified insulation protective film, and a suspended part is reserved; the adhesive tape adhered to the modified insulating protective film is compacted by a rolling mechanism (28) to firmly bond the adhesive tape and the modified insulating protective film, and the overlapped part of the adhesive tape and the insulating protective film is rolled by a roller to realize the firm bonding of the adhesive tape and the insulating protective film; the film tearing manipulator unit (26) tears off the insulating protective film in a mode of clamping the adhesive tape, and the clamping jaw cylinder clamps the suspended part of the adhesive tape and tears the adhesive tape to peel off the insulating protective film;
removing the insulation protective films on the right side E and the left side F:
the modification mechanical hand unit (25) outputs laser beams to continuously scan the insulation protective film on the surface of the lithium battery cell to modify the lithium battery cell, the insulation protective film is directly irradiated by laser, and the process is the same as that of removing the front side B, the lower side C and the rear side D; the insulating protective film is different in material, the allowable technological parameter interval is adaptively adjusted, and 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;
the insulating protective film is stripped from the lithium battery cell in a mechanical scraping mode, and the modified insulating protective film is removed by a scraper.
14. The laser film removing method for the lithium battery cell insulation protective film according to claim 13, wherein: the method specifically comprises the following steps:
the method comprises the following steps: placing a lithium battery cell (23) on a jig (52) of a product in-out unit (24), keeping the front surface B of the lithium battery cell (23) upward, positioning the lithium battery cell (23) at a station 1, and positioning and clamping the lithium battery cell (23) by utilizing an X-direction positioning block I (64), an X-direction positioning block II (68), a Y-direction positioning block (67), an X-direction clamping cylinder (69) and a Y-direction clamping cylinder (66) of the jig (52) to finish feeding;
step two: a robot (44) of the modified manipulator unit (25) aligns the laser irradiation direction of the scanning galvanometer (41) to the front surface B along the Z axis, and a laser distance meter (42) measures the distance from the scanning galvanometer (41) to the surface of the lithium battery cell (23) to realize the determination of the processing position and automatic focusing; emitting laser beams (411) according to set parameters, and irradiating the laser beams to the insulating protective film (12) on the surface of the lithium battery cell to realize the modification of the insulating protective film (12);
step three: the product in-out unit (24) moves the lithium battery cell (23) to the station 2, at the moment, the adhesive tape automatic feeding system (22) starts to work, the servo motor (81) drives the adhesive tape rotating disc (83) to rotate for an angle, and as the adhesive tape and an adsorption claw (99) on the adhesive tape rotating disc (83) have adhesive force, the adhesive tape with a certain length is pulled out from an adhesive tape roll (88) of a feeding shaft (87); then, the pressing block (92) is driven by the air cylinder (93) to extrude the adhesive tape rotating disc (83) with the adsorption claw (99), so that the adhesive tape is adhered to the adsorption claw (99); then, a cutter bar (96) is driven to move through an air cylinder (97), a cutter (95) arranged on the cutter bar (96) feeds along a guide rail (94), and the adhesive tape is cut into sheets; the air cylinder (91) jacks up the material stirring block (98) to separate the cut adhesive tape from the adsorption claw (99);
step four: the film tearing manipulator unit (26) sends laser (1071) through a laser sensor (107) to judge whether a workpiece exists at a station 2, after the workpiece is identified, the working head is moved to the position above an automatic adhesive tape feeding system (22), an adhesive tape sucker (104) adsorbs a peeled adhesive tape (105), then the adhesive tape is moved to the position above a lithium battery cell (23), the adhesive tape (105) is adhered to one end of the lithium battery cell (23), and meanwhile, a suspended part is reserved;
step five: the product in-out unit (24) moves the lithium battery cell (23) to the station 3, a rolling cylinder (114) of a rolling mechanism (28) drives a roller (112) to descend, then the product in-out unit (24) controls the lithium battery cell (23) to reciprocate under the roller (112), and after the adhesive tape (105) is firmly bonded with the modified lithium battery cell surface insulation protective film (12), the roller (112) ascends;
step six: the product in-out unit (24) moves the lithium battery cell (23) to the station 2, the film tearing manipulator unit (26) moves the working head to the position above the lithium battery cell (23), the clamping jaw cylinder (106) clamps the suspended part of the adhesive tape (105) and pulls the suspended part, and the adhesive tape drives the whole front surface B to remove the insulating protective film;
step seven: the film tearing manipulator unit (26) moves the adhesive tape and the torn waste film to the waste film collecting mechanism (21), the servo motor (129) drives the linear motion mechanism (128) to perform linear motion, the linear motion mechanism is guided by the guide rail (125), the pressing claw (123) and the pressing plate (121) are extruded, the waste film (122) is clamped, and the waste film (122) is adhered to the pressing plate (121);
step eight: the film tearing manipulator unit (26) moves the working head to the position of a lithium battery cell (23), drives a first clamping claw (102) and a second clamping claw (109) to move relatively through a first clamping claw cylinder (103) and a second clamping claw cylinder (108), so as to grab the lithium battery cell (23), then rotates the lithium battery cell (23) clockwise by 90 degrees around the Y axis and places the lithium battery cell on the jig (52) again, and at the moment, the lower surface C of the lithium battery cell (23) faces upwards;
step nine: an X-direction positioning block I (64), an X-direction positioning block II (68), a Y-direction positioning block (67), an X-direction clamping cylinder (69) and a Y-direction clamping cylinder (66) of the jig (52) position and clamp the lithium battery cell (23), and the product inlet and outlet unit (24) moves the lithium battery cell (23) to the station 1;
repeating the first step to the ninth step to finish the removal of the insulation protective films on the lower surface C and the rear surface D of the lithium battery cell (23);
step ten: after the insulation protective film of the back D is removed, the product in-out unit (24) moves the lithium battery cell (23) to the station 1 again, the combination of the linear cylinder (72) and the rotary cylinder (71) of the jig (52) enables the lithium battery cell (23) fixed on the product supporting plate (65) by means of self gravity to move upwards along the Z axis linearly and rotate 90 degrees clockwise around the Z axis, and the right E faces to the X axis negative direction; the modification mechanical arm unit (25) moves the working head to the X-axis negative direction of the jig (52), and emits a laser beam (411) according to set parameters to modify the insulation protective film (13);
step eleven: after modification is finished, a straight-line cylinder (63) of the jig (52) drives a scraper (62) to vertically move upwards, and the scraper is used for removing the modified insulating protective film (13) on the right side E;
step twelve: a rotary cylinder (71) of the jig (52) rotates the lithium battery cell (23) anticlockwise for 180 degrees around the Z axis, so that the left surface F faces the X axis negative direction;
repeating the tenth step to the eleventh step to finish the removal of the F insulation protective film (12) on the left surface of the lithium battery cell (23);
step thirteen: after the insulation protective film on the surface of the lithium battery cell is completely removed, a rotary cylinder (71) of a jig (52) rotates the lithium battery cell (23) clockwise by 90 degrees around a Z axis, a product supporting plate (65) is lowered by a linear cylinder (72), and then a product in-out unit (24) moves the lithium battery cell (23) to a station 4; a discharging manipulator (132) of the discharging manipulator unit (27) grabs the lithium battery cell (23) and places the lithium battery cell on a discharging conveyor belt (133).
15. The laser film removing method for the lithium battery cell insulation protective film according to claim 13 or 14, wherein: a pulse laser outputs pulse laser with the wavelength of 500-1100 nm, the laser power of more than 50w and the pulse width of 300 fs-1 us, and a rectangular large light spot is formed by shaping, wherein the size of the light spot is 1.5 multiplied by 0.5mm, and the energy distribution is uniform during laser scanning; the scanning galvanometer controls the movement of light spots, can deflect left and right, up and down, and controls the change of deflection angles of the laser on the left and right, up and down; focusing laser by adopting a laser range finder; and controlling the power, the scanning times, the scanning speed and the defocusing amount process parameters of the laser, so that the energy density is greater than the modification threshold of the insulation protective film and less than the damage threshold of the surface aluminum material of the lithium battery cell.
CN202111577934.8A 2021-12-22 2021-12-22 Laser film removing equipment and method for lithium battery cell insulation protective film Pending CN114308899A (en)

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