Dual-beam laser film removing equipment and method for lithium battery cell insulation protective film

Abstract

The present application relates to a double-beam laser film removing equipment and method for insulating protective film of lithium battery cell, comprising a laser film removing unit, which comprises: a product in-out unit for clamping and conveying lithium battery cell in and out; a laser processing unit located above the middle part of the product in-out unit, for emitting laser beam to continuously scan the surface of the insulating protective film of lithium battery cell; a turnover manipulator located on one side of the product in-out unit along the negative direction of X axis, for moving and turning over the lithium battery cell; and a rack for installing the turnover manipulator, the product in-out unit and the laser processing unit. The present application adopts a double-beam laser processing method, first uses CO2 laser beam to ablate the insulating protective film, and then uses optical fiber laser beam to remove the residue, combining the advantages of CO2 laser and optical fiber laser, solving the problems of more surface residues when using single CO2 laser film removing and low processing efficiency when using single optical fiber laser.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery cells, in particular to a double-beam laser film removal device and method for lithium battery cell insulation protective film. BACKGROUND

[0002] With the awakening of users' environmental awareness and the progress of science and technology, new energy vehicles are gradually replacing traditional vehicles, and as the power source of new energy vehicles, the production of lithium batteries is also increasing. In order to ensure the safety of lithium batteries during use, a layer of insulation protective film will be wrapped around the lithium battery cell during production to prevent the battery cell from directly contacting the external metal shell and causing a short circuit. As shown in Figure 1 , it is a schematic diagram of the appearance of a lithium battery cell. The surface of the lithium battery cell includes top A, front B, bottom C, back D, right E, and left F. Top A is opposite to bottom C, front B is opposite to back D, and right E is opposite to left F. The top A is provided with a protruding tab, and the front B, bottom C, and back D are covered with PET and acrylic insulation protective film. The right E and left F are covered with structural adhesive insulation protective film. However, due to the good adhesion of the insulation protective film, it is very difficult to remove it completely and quickly. Directly using manual or mechanical scraping and other direct contact removal methods will result in low processing efficiency, many surface residues, and damage to the surface of the aluminum material of the battery cell.

[0003] In view of the fact that the current film removal method cannot meet the production needs, there is an urgent need to develop a high-efficiency film removal device and method for lithium battery cell insulation protective film. SUMMARY

[0004] To solve the above technical problems, the purpose of the present application is to provide a double-beam laser film removal device and method for lithium battery cell insulation protective film.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] One of the purposes of the present application is:

[0007] The double-beam laser film removal device for lithium battery cell insulation protective film comprises a laser film removal unit, and the laser film removal unit comprises:

[0008] A product in-out unit for clamping and conveying lithium battery cells in and out;

[0009] A laser processing unit located above the middle part of the product in-out unit for emitting laser beams to continuously scan the surface insulation protective film of the lithium battery cell;

[0010] A turnover manipulator located on one side of the product in-out unit along the negative direction of the X-axis for moving and turning over the lithium battery cell;

[0011] And, a rack for mounting the above-mentioned turnover manipulator, product in-out unit and laser processing unit;

[0012] The product in-out unit comprises a first product in-out shaft and a second product in-out shaft arranged side by side along the Y-axis direction; the first product in-out shaft comprises a first X-direction linear motion platform and a first jig, and the second product in-out shaft comprises a second X-direction linear motion platform and a second jig; the first X-direction linear motion platform and the second X-direction linear motion platform are arranged side by side along the Y-axis direction; the first X-direction linear motion platform drives the first jig to move along the X-axis direction; the second X-direction linear motion platform drives the second jig to move along the X-axis direction; and the first jig and the second jig are used for positioning and clamping the lithium battery cell.

[0013] The laser processing unit comprises a Y-direction linear motion platform, a CO2 laser module and a fiber laser module; the CO2 laser module and the fiber laser module are arranged on the two sides of the Y-direction linear motion platform along the X-axis direction respectively; and the Y-direction linear motion platform can drive the CO2 laser module and the fiber laser module to independently move along the Y-axis direction.

[0014] The turnover manipulator comprises an industrial robot and a tool head; the tool head is mounted on the driving end of the industrial robot.

[0015] As a further improvement of the present application, the first jig comprises a first carrier and a rotary clamping device and a lifting cylinder located on the first carrier; the first X-direction linear motion platform drives the first carrier to move along the X-axis direction; the rotary clamping device is driven by a built-in rotary cylinder; the rotary clamping device is provided with a first positioning block, a second positioning block, a second clamping cylinder and a first clamping cylinder arranged orthogonally to each other on one side along the positive direction of the Y-axis; the lifting cylinder is arranged on the first carrier on the one side along the positive direction of the Y-axis; a first position sensing device is arranged on one side of the bottom of the first carrier; and a second position sensing device is arranged on the side of the rotary clamping device close to the bottom.

[0016] As a further improvement of the present application, the second jig comprises a second carrier and a Y-direction clamping cylinder, an X-direction positioning block, a Y-direction positioning block and an X-direction clamping cylinder located on the second carrier; the Y-direction clamping cylinder and the Y-direction positioning block are located on the second carrier on the two sides along the Y-axis direction respectively; and the X-direction positioning block and the X-direction clamping cylinder are located on the second carrier on the two sides along the X-axis direction respectively; a third position sensing device is arranged on one side of the bottom of the second carrier.

[0017] As a further improvement of the present application, the Y-direction linear motion platform comprises a column, a Y-direction linear motor, a third carrier and a crossbeam, the crossbeam is arranged along the Y-axis direction, the crossbeam is mounted on the rack through a plurality of columns, the crossbeam is provided with a Y-direction linear motor along the Y-axis direction, the third carrier can move along the Y-axis direction under the driving and guiding of the Y-direction linear motor, the CO2 laser module and the fiber laser module are connected with the third carrier and the Y-direction linear motor respectively;

[0018] The CO2 laser module comprises a first light path module, a first scanning galvanometer, a dust collection module and a Z-direction moving module; the Z-direction moving module is connected with the third carrier, the Z-direction moving module drives the first light path module, the first scanning galvanometer and the dust collection module to move along the Z-axis direction, the first light path module is located at one side of the first scanning galvanometer, the CO2 laser beam is transmitted from the laser to the first scanning galvanometer, the first scanning galvanometer outputs the CO2 laser beam to scan the surface insulation protective film of the lithium battery cell, and the dust collection module is located directly below the first scanning galvanometer.

[0019] The fiber laser module comprises a second light path module and a second scanning galvanometer, the second light path module is located at one side of the second scanning galvanometer, the fiber laser beam is transmitted from the laser to the second scanning galvanometer, and the second scanning galvanometer outputs the fiber laser beam to scan the surface insulation protective film of the lithium battery cell.

[0020] As a further improvement of the present application, the tool head is provided with a laser sensor and a clamping cylinder, the laser sensor is located at one side of the clamping cylinder, the clamping cylinder can clamp the lithium battery cell, and the laser sensor can emit laser for detecting whether there is a lithium battery cell.

[0021] The second purpose of the present application is:

[0022] The double-beam laser film removing method for the insulation protective film of the lithium battery cell comprises the following steps:

[0023] Step A: removing the first insulation protective film on the upper surface A, the front surface B, the lower surface C and the rear surface D of the lithium battery cell:

[0024] The lithium battery cell is manually loaded into the first jig, the first X-direction linear motion platform conveys the lithium battery cell, the laser processing unit first outputs the CO2 laser beam to continuously scan the first insulation protective film on the surface of the lithium battery cell to ablate it, and then outputs the fiber laser beam to continuously scan the surface of the lithium battery cell to remove the residues of the first insulation protective film, and the rotary clamping device of the first jig and the overturning manipulator realize the change of the processing position; wherein the laser energy density is greater than the ablation threshold of the first insulation protective film and less than the damage threshold of the surface aluminum material of the lithium battery cell, so that the whole first insulation protective film is removed without damaging the surface of the lithium battery cell.

[0025] Step B: removing the second insulation protective film on the right surface E and the left surface F of the lithium battery cell:

[0026] The turnover manipulator transfers the lithium battery cell from the first fixture to the second fixture, the second X-direction linear motion platform conveys the lithium battery cell, and the steps of removing the first insulating protective film on the upper surface A, the front surface B, the lower surface C, and the rear surface D are repeated, wherein the laser energy density is greater than the ablation threshold of the second insulating protective film and less than the damage threshold of the surface aluminum material of the lithium battery cell, so that the entire surface of the second insulating protective film is removed without damaging the surface of the lithium battery cell.

[0027] Step C: After all the insulating protective films are removed, manual unloading is performed.

[0028] As a further improvement of the present application, step A specifically comprises:

[0029] Step one: Place the lithium battery cell on the first fixture on the first X-direction linear motion platform at the work station, keep the upper surface A upward, and use the first positioning block, the second positioning block, the second clamping cylinder, and the first clamping cylinder of the first fixture to position and clamp the lithium battery cell, complete the feeding, wherein the clamping part is the left half of the lithium battery cell.

[0030] Step two: The first X-direction linear motion platform moves the lithium battery cell to the work station, the CO2 laser module emits a CO2 laser beam according to the set parameters, irradiates the first insulating protective film on the right half of the surface of the upper surface A of the lithium battery cell, and realizes the ablation of the first insulating protective film.

[0031] Step three: The rotary clamping device of the first fixture starts to rotate until the second position sensing device senses that the front surface B is upward.

[0032] Repeat steps two and three to complete the ablation of the first insulating protective film on the right half of the surface of the front surface B, the lower surface C, and the rear surface D of the lithium battery cell.

[0033] Step four: The first X-direction linear motion platform moves the lithium battery cell to the work station, the fiber laser module emits a fiber laser beam according to the set parameters, irradiates the residue of the first insulating protective film on the right half of the surface of the rear surface D of the lithium battery cell, and realizes the removal of the first insulating protective film.

[0034] Step five: The rotary clamping device of the first fixture starts to rotate until the second position sensing device senses that the upper surface A is upward.

[0035] Repeat steps four and five to complete the removal of the first insulating protective film on the right half of the surface of the upper surface A, the front surface B, and the lower surface C of the lithium battery cell.

[0036] Step six: the first X linear motion platform moves the lithium battery cell to the work station, the first jig is lifted by the lifting cylinder, then the second clamping cylinder and the first clamping cylinder are loosened, at this time the lithium battery cell is placed on the first jig, the turning manipulator judges the position of the lithium battery cell by using the laser sensor, the lithium battery cell is clamped by using the jaw cylinder, the lithium battery cell is turned over and placed on the first jig again, the first positioning block, the second positioning block, the second clamping cylinder and the first clamping cylinder of the first jig are used to position and clamp the lithium battery cell again, at this time the clamping part is the right half of the lithium battery cell;

[0037] Steps two, three, four and five are repeated to complete the removal of the first insulation protective film on the left half of the upper surface A, the front surface B, the lower surface C and the rear surface D of the lithium battery cell, at this time the first insulation protective film on the upper surface A, the front surface B, the lower surface C and the rear surface D has been completely removed.

[0038] As a further improvement of the application, step B specifically comprises:

[0039] Step seven: the first X linear motion platform moves the lithium battery cell to the work station, the first jig is lifted by the lifting cylinder, then the second clamping cylinder and the first clamping cylinder are loosened, at this time the lithium battery cell is placed on the first jig, the turning manipulator judges the position of the lithium battery cell by using the laser sensor, the lithium battery cell is clamped by using the jaw cylinder, the lithium battery cell is placed into the second jig on the work station, the Y clamping cylinder, the X positioning block, the Y positioning block and the X clamping cylinder of the second jig are used to position and clamp the lithium battery cell, at this time the right surface E is on the top;

[0040] Step eight: the second X linear motion platform moves the lithium battery cell to the work station, the CO2 laser module emits a CO2 laser beam according to the set parameters, irradiates to the second insulation protective film of the right surface E, and realizes the ablation of the second insulation protective film;

[0041] Step nine: the second X linear motion platform moves the lithium battery cell to the work station, the fiber laser module emits a fiber laser beam according to the set parameters, irradiates to the residue of the second insulation protective film of the right surface E, and realizes the removal of the second insulation protective film;

[0042] Step ten: the second X linear motion platform moves the lithium battery cell to the work station, and the turning manipulator turns over the lithium battery cell again according to step six, and the lithium battery cell is placed into the second jig again, at this time the left surface F is on the top;

[0043] Steps eight and nine are repeated to complete the removal of the second insulation protective film on the left surface F of the lithium battery cell, at this time the insulation protective film on all surfaces of the lithium battery cell has been removed.

[0044] As a further improvement of the application, step C specifically comprises: the second X linear motion platform moves the lithium battery cell to the work station, and the unloading is realized by manual operation.

[0045] As a further improvement of the present application, the CO2 laser module outputs a wavelength of 500-1100 nm, a laser power greater than 50w, and a pulse width of 300fs-1us; the fiber laser module outputs a wavelength of 500-1100 nm, a laser power greater than 50w, and a pulse width of 300fs-1us.

[0046] By the above scheme, the present application has at least the following advantages:

[0047] The present application adopts a double-beam laser processing method, first ablates the insulating protective film with a CO2 laser beam, and then removes the residue with a fiber laser beam, combining the advantages of CO2 laser and fiber laser, solving the problems of using a single CO2 laser to remove film surface residue and using a single fiber laser to process low efficiency;

[0048] The energy density of the CO2 laser beam and the fiber laser beam is greater than the ablation threshold of the insulating protective film and less than the damage threshold of the surface aluminum material of the lithium battery cell, which causes little damage to the surface aluminum material of the lithium battery cell;

[0049] The CO2 laser and the fiber laser can work independently at the same time, and the processing efficiency is high;

[0050] Except for the feeding and discharging processes which are manual, the rest processes are all automatic operations, compared with the traditional manual scraping method, which greatly saves human resources and production cost, and has significant economic benefits.

[0051] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and can be implemented according to the content of the specification, the following will be described in detail with the preferred embodiments of the present application and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as a limitation on the scope, for those skilled in the art, without creative labor, other related drawings can also be obtained from these drawings.

[0053] Figure 1 is a structural schematic diagram of a lithium battery cell;

[0054] Figure 2 is a structural schematic diagram of a laser film removing unit of the present application;

[0055] Figure 3 is a processing station schematic diagram of the present application;

[0056] Figure 4 isFigure 2 Structure diagram of first product in-out shaft;

[0057] Figure 5 Figure 2 Structure diagram of second product in-out shaft;

[0058] Figure 6 Figure 4 Structure diagram of first jig;

[0059] Figure 7 Figure 5 Structure diagram of second jig;

[0060] Figure 8 Figure 2 Structure diagram of laser processing unit;

[0061] Figure 9 Figure 8 Structure diagram of Y-direction linear motion platform;

[0062] Figure 10 Figure 8 Structure diagram of CO2 laser module;

[0063] Figure 11 Figure 8 Structure diagram of fiber laser module;

[0064] Figure 12 Figure 2 Structure diagram of turnover manipulator;

[0065] Figure 13 Figure 12 Structure diagram of tool head;

[0066] Figure 14 CO2 laser beam ablation of the right half of the insulating protective film on the upper surface A is shown in the schematic diagram.

[0067] Figure 15 The fiber laser beam removes the residual insulating protective film on the right half of the back surface D.

[0068] In the drawings, the meanings of various reference signs are as follows.

[0069] 1, lithium battery cell; 11, tab; 12, first insulating protective film; 13, second insulating protective film;

[0070] 2, laser film removal unit; 21, rack; 22, turnover manipulator; 23, product in-out unit; 24, laser processing unit;

[0071] 31, first product in-out shaft; 32, second product in-out shaft; ​​​​​​​​​

[0072] 41, first X linear motion platform; 42, first jig;

[0073] 51, second X linear motion platform; 52, second jig;

[0074] 61, first carrier; 62, first position sensing device; 63, rotary clamping device; 64, second position sensing device; 65, first positioning block; 66, second positioning block; 67, lifting cylinder; 68, second clamping cylinder; 69, first clamping cylinder;

[0075] 71, second carrier; 72, Y-direction clamping cylinder; 73, X-direction positioning block; 74, Y-direction positioning block; 75, third position sensing device; 76, X-direction clamping cylinder;

[0076] 81, Y linear motion platform; 82, CO2 laser module; 83, fiber laser module;

[0077] 91, column; 92, Y linear motor; 93, third carrier; 94, cross beam;

[0078] 101, first optical path module; 102, first scanning galvanometer; 103, dust collection module; 104, Z-direction movement module; 1021, CO2 laser beam;

[0079] 111, second optical path module; 112, second scanning galvanometer; 1121, fiber laser beam;

[0080] 121, industrial robot; 122, tool head;

[0081] 131, laser sensor; 132, clamping cylinder; 1311, laser; DETAILED DESCRIPTION

[0082] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0083] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0084] Embodiment

[0085] As shown in Figures 1-15 ,

[0086] As shown in Figure 1 , it is a schematic diagram of the shape of a lithium battery cell. The surface of the lithium battery cell includes the top surface A, the front surface B, the bottom surface C, the back surface D, the right surface E, and the left surface F. The top surface A is opposite to the bottom surface C, the front surface B is opposite to the back surface D, and the right surface E is opposite to the left surface F. The top surface A is provided with a protruding tab 11. The front surface B, the bottom surface C, and the back surface D are covered by a first insulating protective film 12. The right surface E and the left surface F are covered by a second insulating protective film 13.

[0087] One of the objects of the present application is:

[0088] The double-beam laser film removing equipment for the insulating protective film of the lithium battery cell includes a laser film removing unit 2, which comprises:

[0089] A product in-out unit 23 for clamping and conveying the lithium battery cell 1 in and out;

[0090] A laser processing unit 24 located above the middle part of the product in-out unit 23 for emitting a laser beam to continuously scan the insulating protective film on the surface of the lithium battery cell 1;

[0091] A turnover mechanical hand 22 located on one side of the product in-out unit 23 along the negative direction of the X-axis for moving and turning over the lithium battery cell 1;

[0092] And a rack 21 for mounting the turnover mechanical hand 22, the product in-out unit 23, and the laser processing unit 24;

[0093] During the film removing process, the lithium battery cell 1 mainly operates in eight stations, and the station positions are as shown in Figure 3 .

[0094] In order to improve the processing efficiency, the product in-out unit 23 can be provided with a plurality of product in-out shafts according to the actual situation.

[0095] According to the size change of the lithium battery cell 1, the positioning block position of the jig of the product in-out unit 23 can be adjusted.

[0096] The product in-out unit 23 includes a first product in-out shaft 31 and a second product in-out shaft 32 arranged side by side along the Y-axis direction; the first product in-out shaft 31 includes a first X-direction linear motion platform 41 and a first jig 42, and the second product in-out shaft 32 includes a second X-direction linear motion platform 51 and a second jig 52; the first X-direction linear motion platform 41 and the second X-direction linear motion platform 51 are arranged side by side along the Y-axis direction; the first X-direction linear motion platform 41 drives the first jig 42 to move along the X-axis direction; the second X-direction linear motion platform 51 drives the second jig 52 to move along the X-axis direction; and the first jig 42 and the second jig 52 are used for positioning and clamping the lithium battery cell 1.

[0097] Among them, the first jig 42 is used for processing the upper surface A, the front surface B, the lower surface C and the rear surface D of the lithium battery cell 1; and the second jig 52 is used for processing the right surface E and the left surface F of the lithium battery cell 1.

[0098] The laser processing unit 24 includes a Y-direction linear motion platform 81, a CO2 laser module 82 and a fiber laser module 83; the CO2 laser module 82 and the fiber laser module 83 are arranged on both sides of the Y-direction linear motion platform 81 along the X-axis direction respectively; and the Y-direction linear motion platform 81 can drive the CO2 laser module 82 and the fiber laser module 83 to move independently along the Y-axis direction.

[0099] The turnover manipulator 22 includes an industrial robot 121 and a tool head 122; the tool head 122 is mounted on the driving end of the industrial robot 121.

[0100] Preferably, the first jig 42 includes a first carrier 61, a rotary clamping device 63 and a lifting cylinder 67 arranged on the first carrier 61; the first X-direction linear motion platform 41 drives the first carrier 61 to move along the X-axis direction; the rotary clamping device 63 is driven by a built-in rotary cylinder; a first positioning block 65, a second positioning block 66, a second clamping cylinder 68 and a first clamping cylinder 69 are arranged on one side of the rotary clamping device 63 along the positive direction of the Y-axis and are arranged orthogonally to each other; the lifting cylinder 67 is arranged on the first carrier 61 on one side of the rotary clamping device 63 along the positive direction of the Y-axis; a first position sensing device 62 is arranged on one side of the bottom of the first carrier 61; and a second position sensing device 64 is arranged on the side of the rotary clamping device 63 close to the bottom.

[0101] Among them, the second position sensing device 64 can sense whether the lithium battery cell 1 is rotated to the processing position; and the first position sensing device 62 can sense whether the first jig 42 has accurately reached the station on the first X-direction linear motion platform 41.

[0102] Preferably, the second jig 52 comprises a second carrier 71 and a Y-direction clamping cylinder 72, an X-direction positioning block 73, a Y-direction positioning block 74 and an X-direction clamping cylinder 76 located on the second carrier 71, the Y-direction clamping cylinder 72 and the Y-direction positioning block 74 are respectively located on the second carrier 71 on both sides along the Y-axis direction, and the X-direction positioning block 73 and the X-direction clamping cylinder 76 are respectively located on the second carrier 71 on both sides along the X-axis direction; a third position sensing device 75 is arranged on one side of the bottom of the second carrier 71.

[0103] The third position sensing device 75 has the same function as the first position sensing device 62 on the first jig 42.

[0104] Preferably, the Y-direction linear motion platform 81 comprises a column 91, a Y-direction linear motor 92, a third carrier 93 and a crossbeam 94, the crossbeam 94 is arranged along the Y-axis direction, the crossbeam 94 is installed on the rack 21 through a plurality of columns 91, the crossbeam 94 is provided with the Y-direction linear motor 92 along the Y-axis direction, the third carrier 93 is driven and guided by the Y-direction linear motor 92 to move in the Y-axis direction, and the CO2 laser module 82 and the fiber laser module 83 are respectively connected with the Y-direction linear motor 92 through the third carrier 93.

[0105] The column 91 and the crossbeam 94 have a supporting effect, the third carrier 93 can move in the Y direction under the guidance of the Y-direction linear motor 92, so that the CO2 laser module 82 and the fiber laser module 83 arranged on the third carrier 93 move across the product access unit 23.

[0106] The CO2 laser module 82 comprises a first light path module 101, a first scanning galvanometer 102, a dust collection module 103 and a Z-direction moving module 104; the Z-direction moving module 104 is connected with the third carrier 93, the Z-direction moving module 104 drives the first light path module 101, the first scanning galvanometer 102 and the dust collection module 103 to move along the Z-axis direction, the first light path module 101 is located on one side of the first scanning galvanometer 102, CO2 laser beam 1021 is transmitted from the laser to the first scanning galvanometer 102, the first scanning galvanometer 102 outputs the CO2 laser beam 1021 to scan the surface insulation protective film of the lithium battery cell 1, and the dust collection module 103 is located directly below the first scanning galvanometer 102 to absorb the dust generated during processing and prevent damage to the first scanning galvanometer 102.

[0107] The fiber laser module 83 comprises a second light path module 111 and a second scanning galvanometer 112, the second light path module 111 is located on one side of the second scanning galvanometer 112, and fiber laser beam 1121 is transmitted from the laser to the second scanning galvanometer 112, and the second scanning galvanometer 112 outputs the fiber laser beam 1121 to scan the surface insulation protective film of the lithium battery cell 1.

[0108] Preferably, the tool head 122 is provided with a laser sensor 131 and a clamping cylinder 132, the laser sensor 131 is located on one side of the clamping cylinder 132, the clamping cylinder 132 can realize the clamping of the lithium battery cell 1, and the laser sensor 131 can emit laser 1311 for detecting whether there is a lithium battery cell 1.

[0109] The second object of the present application is:

[0110] The double-beam laser film removal method of the lithium battery cell insulation protection film comprises the following steps:

[0111] Step A: removing the first insulation protection film 12 on the upper surface A, the front surface B, the lower surface C and the rear surface D of the lithium battery cell 1:

[0112] The lithium battery cell 1 is manually loaded into the first jig 42, the first X-direction linear motion platform 41 conveys the lithium battery cell 1, the laser processing unit 24 first outputs a CO2 laser beam 1021 to continuously scan the first insulation protection film 12 on the surface of the lithium battery cell 1 to ablate it, and then outputs a fiber laser beam 1121 to continuously scan the surface of the lithium battery cell 1 to remove the residues of the first insulation protection film 12, and the rotary clamping device 63 of the first jig 42 and the turnover manipulator 22 realize the transformation of the processing position; wherein the laser energy density is greater than the ablation threshold of the first insulation protection film 12 and less than the damage threshold of the surface aluminum material of the lithium battery cell 1, so that the entire first insulation protection film 12 is removed without damaging the surface of the lithium battery cell 1;

[0113] Step B: removing the second insulation protection film 13 on the right surface E and the left surface F of the lithium battery cell 1:

[0114] The turnover manipulator 22 transfers the lithium battery cell 1 from the first jig 42 to the second jig 52, the second X-direction linear motion platform 51 conveys the lithium battery cell 1, and the step of removing the first insulation protection film 12 on the upper surface A, the front surface B, the lower surface C and the rear surface D is repeated, wherein the laser energy density is greater than the ablation threshold of the second insulation protection film 13 and less than the damage threshold of the surface aluminum material of the lithium battery cell 1, so that the entire second insulation protection film 13 is removed without damaging the surface of the lithium battery cell 1;

[0115] Wherein, due to the difference in the material of the insulation protection film, the process parameter interval adaptability is adjusted.

[0116] Wherein, the first insulation protection film 12 is an acrylic insulation protection film, and the second insulation protection film 13 is a structural adhesive insulation protection film.

[0117] Step C: after all the insulation protection films are removed, the lithium battery cell 1 is manually unloaded.

[0118] Preferably, step A specifically comprises:

[0119] Step one: place the lithium battery cell 1 on the first jig 42 on the first X linear motion platform 41 in station 1, keep its upper surface A upward, use the first positioning block 65, the second positioning block 66, the second clamping cylinder 68 and the first clamping cylinder 69 of the first jig 42 to position and clamp the lithium battery cell 1, complete the feeding, wherein the clamping part is the left half of the lithium battery cell 1;

[0120] Step two: the first X linear motion platform 41 moves the lithium battery cell 1 to station 2, the CO2 laser module 82 emits the CO2 laser beam 1021 according to the set parameters, irradiates to the first insulating protective film 12 on the right half surface of the upper surface A of the lithium battery cell 1, realizes the ablation of the first insulating protective film 12;

[0121] Step three: the rotary clamping device 63 of the first jig 42 starts to rotate until the second position sensing device 64 senses that the front surface B is upward;

[0122] Repeat steps two and three to complete the ablation of the first insulating protective film 12 on the right half surface of the front surface B, the lower surface C and the rear surface D of the lithium battery cell 1;

[0123] Step four: the first X linear motion platform 41 moves the lithium battery cell 1 to station 3, the fiber laser module 83 emits the fiber laser beam 1121 according to the set parameters, irradiates to the residue of the first insulating protective film 12 on the right half surface of the rear surface D of the lithium battery cell 1, realizes the removal of the first insulating protective film 12;

[0124] Step five: the rotary clamping device 63 of the first jig 42 starts to rotate until the second position sensing device 64 senses that the upper surface A is upward;

[0125] Repeat steps four and five to complete the removal of the first insulating protective film 12 on the right half surface of the upper surface A, the front surface B and the lower surface C of the lithium battery cell 1;

[0126] Step six: the first X linear motion platform 41 moves the lithium battery cell 1 to station 4, the first jig 42 is lifted by the lifting cylinder 67, then the second clamping cylinder 68 and the first clamping cylinder 69 are loosened, at this time the lithium battery cell 1 is placed flat on the first jig 42, the turnover manipulator 22 uses the laser sensor 131 to judge the position of the lithium battery cell 1, uses the clamping jaw cylinder 132 to clamp the lithium battery cell 1, turns over the lithium battery cell 1, and puts it back on the first jig 42, the first positioning block 65, the second positioning block 66, the second clamping cylinder 68 and the first clamping cylinder 69 of the first jig 42 position and clamp the lithium battery cell 1 again, at this time the clamping part is the right half of the lithium battery cell 1;

[0127] Repeat steps two, three, four, five, to complete the removal of the first insulation protection film 12 of the left half of the upper A, front B, lower C, rear D of the lithium battery cell 1, at this time the first insulation protection film 12 of the upper A, front B, lower C, rear D has been completely removed.

[0128] Preferably, step B specifically includes:

[0129] Step seven: the first X-direction linear motion platform 41 moves the lithium battery cell 1 to the station 4, the first jig 42 is lifted by the lifting cylinder 67, then the second clamping cylinder 68 and the first clamping cylinder 69 are loosened, at this time the lithium battery cell 1 is placed flat on the first jig 42, the turning manipulator 22 judges the position of the lithium battery cell 1 by using the laser sensor 131, and the lithium battery cell 1 is clamped by using the jaw cylinder 132, and then the lithium battery cell 1 is placed into the second jig 52 on the station 5, the Y-direction clamping cylinder 72, the X-direction positioning block 73, the Y-direction positioning block 74 and the X-direction clamping cylinder 76 of the second jig 52 are used to position and clamp the lithium battery cell 1, at this time the right side E is on the top;

[0130] Step eight: the second X-direction linear motion platform 51 moves the lithium battery cell 1 to the station 7, the CO2 laser module 82 emits a CO2 laser beam 1021 according to the set parameters, and irradiates the second insulation protection film 13 of the right side E, so as to realize the ablation of the second insulation protection film 13;

[0131] Step nine: the second X-direction linear motion platform 51 moves the lithium battery cell 1 to the station 6, the fiber laser module 83 emits a fiber laser beam 1121 according to the set parameters, and irradiates the residue of the second insulation protection film 13 of the right side E, so as to realize the removal of the second insulation protection film 13;

[0132] Step ten: the second X-direction linear motion platform 51 moves the lithium battery cell 1 to the station 5, and the turning manipulator 22 turns over the lithium battery cell 1 according to step six, and then the lithium battery cell 1 is placed into the second jig 52 again, at this time the left side F is on the top;

[0133] Repeat steps eight and nine to complete the removal of the second insulation protection film 13 of the left side F of the lithium battery cell 1, at this time the insulation protection films of all sides of the lithium battery cell 1 have been removed.

[0134] Preferably, step C specifically includes: the second X-direction linear motion platform 51 moves the lithium battery cell 1 to the station 8, and the unloading is realized by manual operation.

[0135] Preferably, the CO2 laser module 82 outputs a CO2 laser with a wavelength of 500-1100 nm, a laser power greater than 50w, and a pulse width of 300fs-1us, and the fiber laser module 83 outputs a fiber laser with a wavelength of 500-1100 nm, a laser power greater than 50w, and a pulse width of 300fs-1us.

[0136] In summary, the present application adopts a double-beam laser processing method, first ablates the insulating protective film with a CO2 laser beam, and then removes the residue with a fiber laser beam, combining the advantages of CO2 laser and fiber laser, solving the problems of using a single CO2 laser to remove film surface residue and using a single fiber laser to process low efficiency;

[0137] The energy density of the CO2 laser beam and the fiber laser beam is greater than the ablation threshold of the insulating protective film and less than the damage threshold of the surface aluminum material of the lithium battery cell, and the surface aluminum material of the lithium battery cell is less damaged;

[0138] The CO2 laser and the fiber laser can work independently at the same time, and the processing efficiency is high;

[0139] Except that the feeding and discharging processes are manual, the remaining processes are all automatic operations, compared with the traditional manual scraping method, the manpower resources and production cost are greatly saved, and the economic benefit is remarkable.

[0140] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0141] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0142] The above is only the preferred embodiment of the present application, and is not used to limit the present application, it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, which should be regarded as the protection scope of the present application.

Claims

1. A double-beam laser film removing apparatus for insulating protective film of lithium battery cell, characterized in that, The laser film removing unit (2) comprises: A product in-out unit (23) for clamping and conveying lithium battery cells (1) in and out; A laser processing unit (24) located above the middle of the product in-out unit (23) and used for emitting a laser beam to continuously scan the surface insulating protective film of the lithium battery cell (1); A turnover mechanical arm (22) located on one side of the product in-out unit (23) along the negative direction of the X axis and used for moving and turning over the lithium battery cell (1); And a rack (21) for mounting the turnover mechanical arm (22), the product in-out unit (23) and the laser processing unit (24); The product in-out unit (23) comprises first and second product in-out shafts (31 and 32) arranged side by side along the Y axis direction; the first product in-out shaft (31) comprises a first X-direction linear motion platform (41) and a first jig (42), and the second product in-out shaft (32) comprises a second X-direction linear motion platform (51) and a second jig (52); the first and second X-direction linear motion platforms (41 and 51) are arranged side by side along the Y axis direction; the first X-direction linear motion platform (41) drives the first jig (42) to move along the X axis direction; the second X-direction linear motion platform (51) drives the second jig (52) to move along the X axis direction; and the first and second jigs (42 and 52) are used for positioning and clamping the lithium battery cell (1); The laser processing unit (24) comprises a Y-direction linear motion platform (81), a CO2 laser module (82) and a fiber laser module (83); the CO2 laser module (82) and the fiber laser module (83) are arranged on the two sides of the Y-direction linear motion platform (81) along the X axis direction; and the Y-direction linear motion platform (81) can drive the CO2 laser module (82) and the fiber laser module (83) to independently move along the Y axis direction; The turnover mechanical arm (22) comprises an industrial robot (121) and a tool head (122); and the tool head (122) is mounted on the driving end of the industrial robot (121); The first jig (42) comprises a first carrier (61), a rotary clamping device (63) and a lifting cylinder (67) arranged on the first carrier (61); the first X-direction linear motion platform (41) drives the first carrier (61) to move along the X axis direction; the rotary clamping device (63) is driven by a built-in rotary cylinder; a first positioning block (65), a second positioning block (66), a second clamping cylinder (68) and a first clamping cylinder (69) are arranged on one side of the rotary clamping device (63) along the Y axis positive direction and are arranged orthogonally to each other; the lifting cylinder (67) is arranged on the first carrier (61) on one side of the rotary clamping device (63) along the Y axis positive direction; a first position sensing device (62) is arranged on one side of the bottom of the first carrier (61); and a second position sensing device (64) is arranged on one side of the rotary clamping device (63) close to the bottom.

2. The dual-beam laser film stripping apparatus for lithium battery cell insulation protective film according to claim 1, wherein, The second jig (52) comprises a second carrier (71) and Y-direction clamping cylinders (72), X-direction positioning blocks (73), Y-direction positioning blocks (74) and X-direction clamping cylinders (76) on the second carrier (71), the Y-direction clamping cylinders (72) and the Y-direction positioning blocks (74) are respectively located on the second carrier (71) on both sides along the Y-axis direction, and the X-direction positioning blocks (73) and the X-direction clamping cylinders (76) are respectively located on the second carrier (71) on both sides along the X-axis direction; one side of the bottom of the second carrier (71) is provided with a third position sensing device (75).

3. The dual beam laser depaneling apparatus for lithium battery cell insulation protection film according to claim 1, wherein, The Y-direction linear motion platform (81) comprises a column (91), a Y-direction linear motor (92), a third carrier (93) and a crossbeam (94), the crossbeam (94) is arranged along the Y-axis direction, the crossbeam (94) is installed on the rack (21) through a plurality of columns (91), the crossbeam (94) is provided with the Y-direction linear motor (92) along the Y-axis direction, the third carrier (93) can move in the Y-axis direction under the driving and guiding of the Y-direction linear motor (92), and the CO2 laser module (82) and the fiber laser module (83) are connected with the Y-direction linear motor (92) through the third carrier (93) respectively; The CO2 laser module (82) comprises a first light path module (101), a first scanning galvanometer (102), a dust collection module (103) and a Z-direction moving module (104); the Z-direction moving module (104) is connected with the third carrier (93), the Z-direction moving module (104) drives the first light path module (101), the first scanning galvanometer (102) and the dust collection module (103) to move along the Z-axis direction, the first light path module (101) is located on one side of the first scanning galvanometer (102), CO2 laser beams (1021) are transmitted from a laser to the first scanning galvanometer (102), the first scanning galvanometer (102) outputs the CO2 laser beams (1021) to scan the surface insulating protective film of the lithium battery cell (1), and the dust collection module (103) is located directly below the first scanning galvanometer (102). The fiber laser module (83) comprises a second light path module (111) and a second scanning galvanometer (112), the second light path module (111) is located on one side of the second scanning galvanometer (112), fiber laser beams (1121) are transmitted from a laser to the second scanning galvanometer (112), and the second scanning galvanometer (112) outputs the fiber laser beams (1121) to scan the surface insulating protective film of the lithium battery cell (1).

4. The dual beam laser depaneling apparatus for lithium battery cell insulation protection film according to claim 1, wherein, The tool head (122) is provided with a laser sensor (131) and a clamping jaw cylinder (132), the laser sensor (131) is located on one side of the clamping jaw cylinder (132), the clamping jaw cylinder (132) can clamp the lithium battery cell (1), and the laser sensor (131) can emit laser (1311) to detect whether there is the lithium battery cell (1).

5. The double-beam laser demasking method for insulating the lithium battery cell according to claim 1, wherein, The method comprises the following steps: Step A: remove the first insulation protection film (12) on the top A, front B, bottom C, and back D of the lithium battery cell (1); The first X-direction linear motion platform (41) conveys the lithium battery cell (1), and the laser processing unit (24) first outputs a CO2 laser beam (1021) to continuously scan the first insulation protection film (12) on the surface of the lithium battery cell (1) to ablate it, and then outputs a fiber laser beam (1121) to continuously scan the surface of the lithium battery cell (1) to remove the residue of the first insulation protection film (12), and the rotary clamping device (63) of the first jig (42) and the turnover manipulator (22) realize the transformation of the processing position; wherein the laser energy density is greater than the ablation threshold of the first insulation protection film (12) and less than the damage threshold of the surface aluminum material of the lithium battery cell (1), so that the entire first insulation protection film (12) is removed without damaging the surface of the lithium battery cell (1); Step B: remove the second insulation protection film (13) on the right side E and the left side F of the lithium battery cell (1); The turnover manipulator (22) transfers the lithium battery cell (1) from the first jig (42) to the second jig (52), and the second X-direction linear motion platform (51) conveys the lithium battery cell (1), and repeats the steps of removing the first insulation protection film (12) on the top A, front B, bottom C, and back D, wherein the laser energy density is greater than the ablation threshold of the second insulation protection film (13) and less than the damage threshold of the surface aluminum material of the lithium battery cell (1), so that the entire second insulation protection film (13) is removed without damaging the surface of the lithium battery cell (1); Step C: after all the insulation protection films are removed, manually unload.

6. The dual-beam laser demasking method of claim 5, wherein the lithium battery cell insulation protective film is a film having a thickness of 10 to 100 μm. The step A specifically comprises: Step one: place the lithium battery cell (1) on the first jig (42) on the first X-direction linear motion platform (41) at station 1, keep the top A facing up, and use the first positioning block (65), the second positioning block (66), the second clamping cylinder (68), and the first clamping cylinder (69) of the first jig (42) to position and clamp the lithium battery cell (1), complete the feeding, wherein the clamping part is the left half of the lithium battery cell (1); Step two: the first X-direction linear motion platform (41) moves the lithium battery cell (1) to station 2, the CO2 laser module (82) emits a CO2 laser beam (1021) according to the set parameters, irradiates to the first insulation protection film (12) on the right half of the surface of the top A of the lithium battery cell (1), and realizes the ablation of the first insulation protection film (12); Step three: the rotary clamping device (63) of the first jig (42) starts to rotate until the second position sensing device (64) senses that the front B is facing up; Repeat steps two and three to complete the ablation of the first insulation protection film (12) on the right half of the surface of the front B, bottom C, and back D of the lithium battery cell (1); Step four: the first X linear motion platform (41) moves the lithium battery cell (1) to station 3, the optical fiber laser module (83) emits the optical fiber laser beam (1121) according to the set parameters, irradiates to the residual of the first insulation protection film (12) on the right half part surface of the back D of the lithium battery cell (1), and realizes the removal of the first insulation protection film (12); Step five: the rotary clamping device (63) of the first jig (42) starts to rotate until the second position sensing device (64) senses that the upper surface A faces upward; Steps four and five are repeated to complete the removal of the first insulation protection film (12) on the right half part surface of the upper surface A, the front surface B and the lower surface C of the lithium battery cell (1); Step six: the first X linear motion platform (41) moves the lithium battery cell (1) to station 4, the first jig (42) is lifted by the lifting cylinder (67), then the second clamping cylinder (68) and the first clamping cylinder (69) are loosened, at this time the lithium battery cell (1) is placed on the first jig (42), the overturning manipulator (22) judges the position of the lithium battery cell (1) by using the laser sensor (131), and the lithium battery cell (1) is clamped by using the jaw cylinder (132), the lithium battery cell (1) is turned over and placed on the first jig (42) again, the first positioning block (65), the second positioning block (66), the second clamping cylinder (68) and the first clamping cylinder (69) of the first jig (42) position and clamp the lithium battery cell (1) again, at this time the clamping part is the right half part of the lithium battery cell (1); Steps two, three, four and five are repeated to complete the removal of the first insulation protection film (12) on the left half part of the upper surface A, the front surface B, the lower surface C and the back D of the lithium battery cell (1), at this time the first insulation protection film (12) on the upper surface A, the front surface B, the lower surface C and the back D has been completely removed.

7. The dual-beam laser demasking method of claim 5, wherein the lithium battery cell insulation protective film is a polypropylene film. The step B specifically comprises: Step seven: the first X linear motion platform (41) moves the lithium battery cell (1) to station 4, the first jig (42) is lifted by the lifting cylinder (67), then the second clamping cylinder (68) and the first clamping cylinder (69) are loosened, at this time the lithium battery cell (1) is placed on the first jig (42), the overturning manipulator (22) judges the position of the lithium battery cell (1) by using the laser sensor (131), and the lithium battery cell (1) is clamped by using the jaw cylinder (132), the lithium battery cell (1) is placed into the second jig (52) on the station 5, the Y clamping cylinder (72), the X positioning block (73), the Y positioning block (74) and the X clamping cylinder (76) of the second jig (52) position and clamp the lithium battery cell (1), at this time the right surface E is on the top; Step eight: the second X linear motion platform (51) moves the lithium battery cell (1) to station 7, the CO2 laser module (82) emits the CO2 laser beam (1021) according to the set parameters, irradiates to the second insulation protection film (13) of the right surface E, and realizes the ablation of the second insulation protection film (13); Step nine: the second X linear motion platform (51) moves the lithium battery cell (1) to station 6, the fiber laser module (83) emits a fiber laser beam (1121) according to the set parameters, irradiates to the residue of the second insulating protective film (13) on the right surface E, and realizes the removal of the second insulating protective film (13); Step ten: the second X linear motion platform (51) moves the lithium battery cell (1) to station 5, and the turnover manipulator (22) turns over the lithium battery cell (1) according to step six, and then the lithium battery cell (1) is placed in the second jig (52) again, at this time, the left surface F is on the top. Repeat steps eight and nine to complete the removal of the second insulating protective film (13) on the left surface F of the lithium battery cell (1), at this time, the insulating protective film on all surfaces of the lithium battery cell (1) has been removed.

8. The dual-beam laser demasking method of claim 5, wherein the lithium battery cell insulation protective film is a polypropylene film. The step C specifically comprises: the second X linear motion platform (51) moves the lithium battery cell (1) to station 8, and realizes the unloading by manual operation.

9. The dual-beam laser demasking method of claim 5, wherein the lithium battery cell insulation protective film is a polypropylene film. The CO2 laser module (82) outputs CO2 laser with a wavelength of 500-1100 nm, a laser power greater than 50w, and a pulse width of 300fs-1us, and the fiber laser module (83) outputs fiber laser with a wavelength of 500-1100 nm, a laser power greater than 50w, and a pulse width of 300fs-1us.

Images