CN114888451A

CN114888451A - Full laser film-making, cutting and folding integrated machine

Info

Publication number: CN114888451A
Application number: CN202210510663.2A
Authority: CN
Inventors: 陶雄兵; 徐俊南; 周欣; 张海波
Original assignee: Dongguan Shengxiong Laser Advanced Equipment Co ltd
Current assignee: Dongguan Shengxiong Laser Advanced Equipment Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-08-12

Abstract

The application discloses full laser system piece cuts and folds all-in-one, include positive pole piece film-making equipment, negative pole piece film-making equipment and be used for carrying out the lamination equipment of lamination to positive pole piece and negative pole piece. The anode pole piece production equipment comprises a first picosecond or femtosecond laser cutting system, the cathode pole piece production equipment comprises a second picosecond or femtosecond laser cutting system, and the laser power of a laser cutter in the first picosecond or femtosecond laser cutting system is designed to be 250W-1000W. The laser power of the positive pole piece production equipment is designed to be 250W-1000W, laser cutting of the positive pole piece can be well achieved, and the laser cutting device has the advantages of being small in heat affected zone, not prone to dust generation, less in molten bead splashing, good in edge burr control effect and the like, the quality stability of the positive pole piece production is improved, the positive pole piece production efficiency is improved, the full-laser cutting and stacking integrated battery production mode is achieved, and the stacking efficiency and the stacking yield are further improved.

Description

Full laser film-making, cutting and folding integrated machine

Technical Field

The application relates to the technical field of battery pole piece processing, in particular to a full-laser slicing, cutting and stacking all-in-one machine.

Background

Lithium ion batteries have the advantages of high specific energy, high cycle times, long storage time and the like, are widely applied to portable electronic equipment such as mobile phones, digital cameras and portable computers (consumer batteries), and are also widely applied to large and medium-sized electric equipment (power batteries) such as electric automobiles, electric bicycles, electric tools and the like, solar power generation equipment, wind power generation equipment and renewable energy sources stored energy sources (energy storage batteries).

The laminated battery is one of lithium batteries, has the advantages of high energy density, small internal resistance, good discharging platform, convenience for quick charging and discharging of large current, no dead angle and the like, and has a new development trend along with the release of a global head laminated battery application white paper 'Chinese vehicle-level power high-speed laminated battery development white paper'.

For the laminated battery, a plurality of pole pieces with the pole lugs need to be processed in advance, and the pole pieces are sequentially laminated to form the battery. However, the material composition of the positive electrode plate material is more complex than that of the negative electrode plate material, and the coating area of the positive electrode material cannot be cut by the conventional nanosecond laser cutter, so that the coating area of the positive electrode material can only be cut by using a hardware die cutting process. However, the service life of the cutter in the hardware die cutting process is short, the cutting effect becomes poor after the cutter is used for a period of time, burrs are easily generated and fall powder when the positive pole piece is cut, the production quality of the pole piece is affected, and further the lamination yield is low, and the safety performance of the battery cell is affected. Moreover, because the life of cutting die is short, also need often polish and change, long-term maintenance cost is high, and to multiple size cutting demand, need open many sets of moulds moreover, the remodelling is troublesome, can not realize flexible production. Therefore, the defects of low sheet production efficiency, unstable sheet production quality, high sheet production cost and the like still exist in the sheet production of the positive pole piece at present, and the further development of the laminated battery is severely restricted.

Disclosure of Invention

In view of this, the present application provides an all-laser sheet-making and cutting-stacking all-in-one machine, which improves the lamination efficiency and the lamination yield.

For reaching above-mentioned technical purpose, this application provides full laser system piece cutting folds all-in-one, includes: the device comprises positive pole piece manufacturing equipment for preparing a positive pole piece, negative pole piece manufacturing equipment for preparing a negative pole piece and laminating equipment for laminating the positive pole piece and the negative pole piece;

the positive pole piece manufacturing equipment comprises a first picosecond or femtosecond laser cutting system;

the negative pole piece manufacturing equipment comprises a second picosecond or femtosecond laser cutting system;

the laser power in the first picosecond or femtosecond laser cutting system is 250W-1000W;

the first picosecond or femtosecond laser cutting system and the second picosecond or femtosecond laser cutting system comprise a first laser cutting device and a second laser cutting device;

the first laser cutting device comprises a first laser cutter;

the first laser cutter is used for cutting the coiled material to form a sheet material;

the second laser cutting device comprises a second laser cutter;

and the second laser cutter is used for cutting the sheet to form a positive pole piece or a negative pole piece provided with a pole lug.

Further, the first laser cutter and the second laser cutter of the positive pole piece production equipment are picosecond or femtosecond laser cutters with the power of 250W-1000W.

Further, the second picosecond or femtosecond laser cutting system is also provided with a picosecond or femtosecond laser cutter with the laser power of 250W-1000W.

Furthermore, the width of each sheet is equal to the sum of the widths of n positive pole pieces or negative pole pieces obtained by cutting the sheet, wherein n is more than or equal to 1 and is a natural number.

Further, the first laser cutter comprises at least two laser units;

at least two laser units are arranged according to a first preset array rule array.

Further, the second laser cutter comprises at least two laser units;

and at least two laser units are arranged according to a second preset array rule array.

Further, the positive pole piece manufacturing equipment and the negative pole piece manufacturing equipment both comprise pre-positioning devices;

the pre-positioning device is used for correcting the position of the sheet material.

Furthermore, the pre-positioning device comprises a first rotating device, and a first feeding station, a first positioning station, a first discharging station and a second positioning station which are sequentially distributed around the first rotating device at equal angles;

a first material transfer device and a second material transfer device are fixedly connected to a rotating shaft of the first rotating device;

the first material transfer device can rotate among the first feeding station, the first positioning station and the first discharging station;

the second material transfer device can rotate among the first feeding station, the second positioning station and the first blanking station;

the first positioning station and the second positioning station are respectively provided with a correcting device for correcting the position of the sheet;

the first feeding station is in butt joint with the first laser cutting device, and the first discharging station is in butt joint with the second laser cutting device.

Further, the correcting device comprises a detection unit and a shifting unit which are distributed from top to bottom.

Furthermore, a connecting plate is fixedly connected to a rotating shaft of the first rotating device, and the first material transfer device and the second material transfer device are fixedly connected to the rotating shaft through the connecting plate.

Furthermore, the connecting plate is in a cross shape, two adjacent end parts of the connecting plate are respectively provided with the first material transfer device, and the other two adjacent end parts of the connecting plate are respectively provided with the second material transfer device.

Further, the first material transfer device and the second material transfer device each include a suction cup unit mounted on the connecting plate.

Furthermore, the second laser cutting device also comprises a second rotating device, and a second feeding station, a CCD (charge coupled device) detection station, a second cutting station and a second discharging station which are distributed around the second rotating device;

the second feeding station is in butt joint with the pre-positioning device, the CCD detection device is arranged on the CCD detection station, and the second laser cutter is arranged on the second cutting station.

Further, positive pole piece film-making equipment with negative pole piece film-making equipment is including the loading attachment that is used for carrying the coil stock to and be used for carrying the positive pole piece or the negative pole piece that prepare to the unloader of lamination equipment.

Furthermore, cleaning detection equipment is respectively arranged between the blanking device and the lamination equipment;

the cleaning detection equipment is used for detecting and cleaning the prepared positive pole piece or negative pole piece, and conveying the positive pole piece or negative pole piece which is qualified in detection and cleaned to the lamination equipment.

Further, the cleaning detection equipment comprises a detection device, a sorting device and a cleaning device which are sequentially arranged.

Further, the lamination machine include with positive pole piece material feeding unit that positive pole piece film-making equipment is connected, with negative pole piece material feeding unit that negative pole piece film-making equipment is connected, be used for carrying positive pole piece that comes and carrying out the pile platform device of lamination to positive pole piece material feeding unit and negative pole piece that negative pole piece device carried and come and carry out the rubberizing device of rubberizing with the battery that will fold.

Further, the positive pole piece conveying device and/or the negative pole piece conveying device comprises a first vacuum conveying belt, a second vacuum conveying belt, a knockout mechanism and a third vacuum conveying belt;

the first vacuum conveying belt and the second vacuum conveying belt are sequentially arranged along a straight line direction;

the third vacuum conveying belt is arranged below the second vacuum conveying belt and is vertical to the second vacuum conveying belt, the third vacuum conveying belt is provided with a part of conveying section which is overlapped with the second vacuum conveying belt in the vertical direction, and the third vacuum conveying belt is used for conveying the positive pole piece or the negative pole piece to the stacking device;

the second vacuum conveying belt is arranged above the first vacuum conveying belt and is provided with a part of conveying section which is overlapped with the first vacuum conveying belt in the vertical direction;

the positive pole piece or the negative pole piece can be transferred to the second conveying belt from a conveying section, which is overlapped with the second vacuum conveying belt, on the first vacuum conveying belt or transferred to the first vacuum conveying belt from a conveying section, which is overlapped with the first vacuum conveying belt, on the second vacuum conveying belt under the action of the first vacuum conveying belt and the second vacuum conveying belt;

the knockout mechanism is arranged at the conveying section position on the second vacuum conveying belt overlapped with the third vacuum conveying belt and is used for knocking the positive pole piece or the negative pole piece on the second vacuum conveying belt down to the third vacuum conveying belt.

According to the technical scheme, the full-laser slicing, cutting and stacking all-in-one machine comprises positive pole piece production equipment for preparing the positive pole piece, negative pole piece production equipment for preparing the negative pole piece and stacking equipment for stacking the positive pole piece and the negative pole piece. The positive pole piece production equipment comprises a first picosecond or femtosecond laser cutting system, the negative pole piece production equipment comprises a second picosecond or femtosecond laser cutting system, and the laser power in the first picosecond or femtosecond laser cutting system is designed to be 250W-1000W. The laser power of the positive pole piece production equipment is designed to be 250W-1000W, the laser cutting of the positive pole piece can be well realized, and the laser cutting equipment has the advantages of small heat affected zone, difficulty in generating dust, less splashing of molten beads, good edge burr control effect and the like, so that the quality stability of the positive pole piece production is improved, the positive pole piece production efficiency is also improved, the full-laser cutting and stacking integrated battery production mode is realized, and the stacking efficiency and the stacking yield are further improved. And first picosecond or femtosecond laser cutting system and second picosecond or femtosecond laser cutting system all design and include first laser cutting device and second laser cutting device, wherein, first laser cutter is used for cutting the coil stock and forms the sheet, the second laser cutter is used for cutting the sheet and forms the anodal pole piece or the negative pole piece that disposes utmost point ear, this kind cuts off earlier the continuity of realization pole piece production that the cutting design of cutting utmost point ear can be better, help improving the film-making efficiency, and then improve lamination efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a top view of an all-laser sheeting, cutting and folding all-in-one machine provided herein;

fig. 2 is a top view of a positive electrode sheet making device/a negative electrode sheet making device of the all-laser sheet making, cutting and stacking all-in-one machine provided in the present application;

FIG. 3 is an enlarged view of the position A in FIG. 2;

fig. 4 is a perspective view of a feeding device and a first laser cutting device with a first laser cutter of the all-laser sheet-making, cutting and stacking all-in-one machine provided in the present application;

FIG. 5 is a perspective view of a pre-positioning device of the all-laser sheeting, cutting and folding all-in-one machine provided in the present application;

fig. 6 is a perspective view of a second laser cutting device and a blanking device of the all-laser sheet-making, cutting and stacking all-in-one machine provided in the present application;

fig. 7 is a partial schematic structural view of a second laser cutting device of the all-laser sheet-making, cutting and stacking all-in-one machine provided in the present application;

fig. 8 is a schematic diagram of a cutting process of the positive electrode sheet producing apparatus/the negative electrode sheet producing apparatus;

fig. 9 is a schematic diagram of a splicing structure of a plurality of positive electrode sheet transport devices/a plurality of negative electrode sheet transport devices of the all-laser sheet-making, cutting and stacking all-in-one machine provided in the present application;

FIG. 10 is a schematic view of a cutting portion of the positive electrode tab;

in the figure: 100. positive pole piece manufacturing equipment; 200. negative pole piece manufacturing equipment; 300. a lamination device;

10. a feeding device;

20. a first laser cutting device; 21. a first laser cutter;

30. a pre-positioning device; 311. a first feeding station; 312. a first positioning station; 313. a first blanking station; 314. a second positioning station; 32. a first rotating device; 33. a first material transfer device; 34. a second material transfer device; 35. a corrective device; 351. a detection unit; 352. a shift unit; 36. a connecting plate; 37. a suction cup unit;

40. a second laser cutting device; 41. a second laser cutter; 42. a second rotating device; 431. a second feeding station; 432. a CCD detection station; 433. a second cutting station; 434. a second blanking station; 44. a CCD detection device; 45. a loading seat;

50. a blanking device;

60. a picosecond or femtosecond laser unit; 61. a positive pole piece feeding device; 62. a negative pole piece feeding device; 70. a stage stacking device; 80. a rubberizing device; 90. cleaning the detection device;

01. coiling; 02. a sheet material; 03. pole pieces; 031. a tab; 04. a first vacuum conveyor belt; 05. a second vacuum conveyor belt; 06. a third vacuum conveyor belt; 07. and a knockout mechanism.

Detailed Description

The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The embodiment of the application discloses full laser film making, cutting and folding all-in-one machine.

Referring to fig. 1, an embodiment of an all-laser slicing and stacking all-in-one machine provided in an embodiment of the present application includes:

the device comprises a positive pole piece manufacturing device 100 for preparing a positive pole piece, a negative pole piece manufacturing device 200 for preparing a negative pole piece and a laminating device 300 for laminating the positive pole piece and the negative pole piece.

The positive pole piece manufacturing equipment 100 comprises a first picosecond or femtosecond laser cutting system, the negative pole piece manufacturing equipment 200 comprises a second picosecond or femtosecond laser cutting system, and the laser power in the first picosecond or femtosecond laser cutting system is designed to be 250W-1000W. The laser power design of the positive pole piece production equipment 100 is 250W-1000W, the laser cutting of the positive pole piece can be well realized, and the laser cutting equipment has the advantages of small heat affected zone, difficulty in generating dust, less splashing of molten beads, good edge burr control effect and the like, so that the quality stability of the positive pole piece production is improved, the positive pole piece production efficiency is also improved, the lamination efficiency and the lamination yield are further improved, and the full laser cutting and stacking integrated battery production mode is high in quality and efficiency.

The first picosecond or femtosecond laser cutting system and the second picosecond or femtosecond laser cutting system in the application are galvanometer type laser cutting systems.

The above is a first embodiment of the all-laser slicing, stacking and cutting integrated machine provided in the embodiment of the present application, and the following is a second embodiment of the all-laser slicing, stacking and cutting integrated machine provided in the embodiment of the present application, specifically referring to fig. 1 to fig. 10.

The scheme based on the first embodiment is as follows:

as shown in fig. 1, 4 and 6, each of the first and second picosecond or femtosecond laser cutting systems includes a first laser cutting device 20 and a second laser cutting device 40; the first laser cutting device 20 includes a first laser cutter 21; the first laser cutter 21 is used to cut the web 01 to form the sheet 02. The second laser cutting device 40 includes a second laser cutter 41; the second laser cutter 41 is used to cut the sheet 02 to form a positive electrode sheet or a negative electrode sheet provided with a tab 031. This kind of cutting design of cutting off earlier back cutting utmost point ear 031 can be better realize the continuity of pole piece 03 production, helps improving the film-making efficiency, and then improves lamination efficiency.

Further, the laser power in the second picosecond or femtosecond laser cutting system is also designed to be 250W-1000W. The cutting of the positive/negative pole piece is performed by adopting a picosecond or femtosecond laser cutter with the power of 250W-1000W, the equipment is unified, the whole installation and maintenance are more convenient, and meanwhile, the film-making rhythm of the positive pole piece and the film-making rhythm of the negative pole piece are more easily unified, so that the better production efficiency of the laminated battery can be realized.

Further, in order to avoid adding excess leftover materials when the sheet 02 is cut to form the pole piece 03, the width of the sheet 02 can be designed to be the same as the sum of the widths of n pole pieces 03 obtained by cutting the sheet 02, wherein n is greater than or equal to 1 and is a natural number. To output two pole pieces 03 with one sheet 02, the width of one sheet 02 is just the sum of the widths of the two cut pole pieces 03, and so on. A many film-making processes can further reduce the film-making time of a single pole piece 03 and improve the film-making efficiency. In the case of a one-to-two design flow, the sheet-making time of a single pole piece 03 can reach 0.5s or more, that is, the sheet-making efficiency of more than 0.5 s/sheet is realized.

Further, in order to realize cutting of the sheet material 02 with a larger width, for example, a pole piece material with a width of 250mm or more, the first laser cutter 21 may be designed to include at least two picosecond or femtosecond laser units 60, and the at least two picosecond or femtosecond laser units 60 are arranged in a first preset array regular array. The picosecond or femtosecond laser unit comprises a scanning galvanometer and a laser, receives a laser beam emitted by the laser through the scanning galvanometer, and cuts a coil stock or a sheet according to a preset cutting path. Taking 590 battery pole pieces as an example, the actual length of 530mm (that is, the width of the pole piece material used for preparing 590 battery pole pieces is more than 530 mm), the cutting can be realized by splicing 270mm +270mm, so that the number of the vibrating mirrors is increased to further increase the coverage breadth of the vibrating mirrors.

As shown in fig. 8, two picosecond or femtosecond laser units 60, for example, may be disposed adjacent to each other in a direction perpendicular to the feeding direction of the web 01. For the division of the sheet 02 and the web 01, one picosecond or femtosecond laser unit 60 is responsible for the upper division of the sheet 02 and the web 01, and the other picosecond or femtosecond laser unit 60 is responsible for the lower division of the sheet 02 and the web 01, i.e., for the left division line of the sheet 02, the division is realized by two picosecond or femtosecond laser units 60.

Further, in order to be able to cut a plurality of pole pieces 03 at a time from the sheet 02 having a larger width, the second laser cutter 41 may also be designed to include at least two picosecond or femtosecond laser units 60, and the at least two picosecond or femtosecond laser units 60 are arranged in a second predetermined array rule array.

Taking two picosecond or femtosecond laser units 60 as an example, they may be arranged adjacent to each other in the length direction of the sheet 02 to be cut. As shown in fig. 8, that is, for the sheet 02, one picosecond or femtosecond laser unit 60 is responsible for cutting and forming the tab 031, and the sheet 02 is divided by the two picosecond or femtosecond laser units 60 to form two pole pieces 03, that is, for the dividing line of the two pole pieces 03, the two picosecond or femtosecond laser units 60 are respectively cut from both ends. That is, the second laser cutter 41 can cut the tab 031 and the cut sheet 02, and then form two or more pole pieces 03 having the tab 031 arranged thereon at one time.

When the positive pole piece is cut, the laser parameters of the laser can be designed to include: the energy of a single pulse is more than or equal to 75 mu J, the width of the single pulse is less than or equal to 10 picoseconds, and the repetition frequency is 2.0MHz-10 MHz. The power of the scanning galvanometer is 250-1000W, the laser parameters are picosecond lasers or femtosecond lasers with single pulse energy more than or equal to 75 muJ, single pulse width less than or equal to 10 picoseconds and repetition frequency of 2.0-10 MHz, so that the high-efficiency cutting of the anode coil or the anode sheet can be better realized, and the method has the advantages of small heat affected zone, difficult dust generation, less molten bead splashing, good edge burr control effect and the like.

In order to achieve better cutting quality, the cutting parameters of the scanning galvanometer are varied as the current cutting path changes corresponding to the material zone of the web or sheet. Taking cutting of the positive pole piece as an example: if the current cutting path corresponds to the AT9 region of the positive pole piece, the cutting parameters include: the single scanning speed is less than or equal to 5000mm/s and less than or equal to 55000mm/s, and the repeated scanning times are less than or equal to 3 times and less than or equal to 15 times. That is, when AT9 area cutting is performed, the repeated scanning times are set to 3-15 times, and the single scanning speed is set to 5000-55000 mm/s, so that the AT9 area can be cut through, and good cutting efficiency and cutting quality can be ensured. If the current cutting path corresponds to the AT9 region of the positive pole piece, the cutting parameters include: the single scanning speed is less than or equal to 5000mm/s and less than or equal to 55000mm/s, and the repeated scanning times are less than or equal to 3 times and less than or equal to 15 times. That is, when AT9 area cutting is performed, the repeated scanning times are set to 3-15 times, and the single scanning speed is set to 5000-55000 mm/s, so that the AT9 area can be cut through, and good cutting efficiency and cutting quality can be ensured. If the current cutting path corresponds to the coating area of the positive pole piece, the cutting parameters comprise: the single scanning speed is more than or equal to 20000mm/s and less than or equal to 55000mm/s, and the repeated scanning times are more than or equal to 6 times and less than or equal to 25 times. That is, when cutting the coating area, the number of repeated scanning is set to 6-25 times, and the single scanning speed is set to 20000 mm/s-55000 mm/s, so that the coating area can be cut through, and good cutting efficiency and cutting quality can be ensured.

Further, as for the specific range of the laser power, it may be a power range formed by any two power end points of 250W, 300W, 350W, 400W, 450W, 500W, 550W, 600W, 650W, 700W, 750W, 800W, 850W, 900W, 950W, 1000W, for example, 300W to 500W.

Further, the positive electrode sheet manufacturing apparatus 100 and the negative electrode sheet manufacturing apparatus 200 each further include a pre-positioning device 30, and the pre-positioning device 30 is used for correcting the position of the sheet 02. The pre-positioning device 30 is used for correcting the position of the sheet 02, so that the cutting precision of the sheet 02 can be further improved, and the quality of the pole piece 03 is improved.

The pre-positioning device 30 comprises a first rotating device 32, and a first feeding station 311, a first positioning station 312, a first discharging station 313 and a second positioning station 314 which are sequentially distributed around the first rotating device 32 at equal angles.

As shown in fig. 3 and 5, a first material transfer device 33 and a second material transfer device 34 are fixedly connected to a rotating shaft of the first rotating device 32; the first material transfer device 33 is rotatable between a first loading station 311, a first positioning station 312 and a first unloading station 313; the second material transfer device 34 is rotatable between a first loading station 311, a second positioning station 314 and a first unloading station 313; the first positioning station 312 and the second positioning station 314 are both provided with a correcting device 35 for correcting the position of the sheet material 02; the first feeding station 311 is in butt joint with the first laser cutting device 20, and the first discharging station 313 is in butt joint with the second laser cutting device 40.

The pre-positioning device 30 of this design of this application still possesses the correction effect, and adopts the mode of dislocation correction to carry out the position correction respectively to the sheet 02 of continuous input, has the advantage that the correction is efficient.

For example, when there is a sheet 02 at the first loading station 311, the first material transfer device 33 moves to above the first loading station 311 by the first rotating device 32 to grab the sheet 02, and after the first material transfer device 33 grabs the sheet 02, the first rotating device 32 rotates, at which time, the first material transfer device 33 moves the sheet 02 to the first positioning station 312, and the second material transfer device 34 is located at the second positioning station 314 to grab the sheet 02 straightened by the straightening device 35 to the second laser cutting device 40.

After the first material transfer device 33 clamps the sheet 02, the first rotating device 32 rotates, at this time, the first material transfer device 33 moves the sheet 02 to the first positioning station 312, the correcting device 35 adjusts the position of the sheet 02, and the second material transfer device 34 is located at the second positioning station 314; after the straightening device 35 at the first positioning station 312 finishes straightening, the first material transfer device 33 moves the sheet 02 to the first unloading station 313, and at this time, the second material transfer device 34 is located at the first loading station 311 to clamp the next sheet 02.

Further, the straightening device 35 includes a detecting unit 351 and a shifting unit 352 distributed from top to bottom, and the first positioning station 312 and the second positioning station 314 are disposed between the detecting unit 351 and the shifting unit 352. Specifically, the material transferring device places the sheet 02 on the shifting unit 352, the detecting unit 351 acquires the position of the sheet 02, if the position of the sheet 02 is deviated, the shifting unit 352 moves the sheet 02 to a specified position, and when the detecting unit 351 detects that the position of the sheet 02 is correct, the sheet 02 can be clamped into the first blanking station 313 through the material transferring device; the detection unit 351 may be a CCD detection module, and specifically includes a camera capable of acquiring position information of the sheet 02 and a processing unit for determining whether the position of the sheet 02 is correct; the shifting unit 352 may be an xy θ positioning platform for bearing the sheet 02, a structure for fixing the sheet 02 such as a suction cup is disposed on the positioning platform, and a structure for driving a ball screw module through a motor may be disposed between the positioning platform and the frame of the first laser cutting device 20, so as to control the movement of the xy θ positioning platform.

Further, a connection plate 36 is fixedly connected to the rotation shaft of the first rotation device 32, and the first material transfer device 33 and the second material transfer device 34 are fixedly connected to the rotation shaft through the connection plate 36.

Specifically, the connecting plate 36 is in a cross shape, two adjacent ends of the connecting plate 36 are respectively provided with a first material transfer device 33, and the other two adjacent ends of the connecting plate 36 are respectively provided with a second material transfer device 34. Illustratively, for the path from the first loading station 311, the first positioning station 312 to the first unloading station 313, the first material transfer device 33 mounted on the connecting plate 36 can reciprocate between the first loading station 311 and the first positioning station 312 to clamp the sheet 02 to the first positioning station 312, and the second material transfer device 33 can reciprocate between the first positioning station 312 and the first unloading station 313 to place the corrected sheet 02 to the first unloading station 313, which is equivalent to that the first rotating device 32 only needs to make a reciprocating degree rotation to complete the circulation of the sheet 02; similarly, the second material transferring device 34 is also located from the first loading station 311, the second positioning station 314 to the first unloading station 313.

Of course, the connecting plate 36 may also be designed as an "I" shape, and the two ends of the connecting plate are respectively provided with the first material transfer device 33 and the second material transfer device 34. The difference from the above embodiment is that the first rotating device 32 needs to rotate 180 degrees, and the circulation of the sheet 02 from the first loading station 311, the positioning station to the first unloading station 313 is completed through a material transferring device.

Further, the first material transfer device 33 and the second material transfer device 34 each include a suction cup unit 37 mounted on the connection plate 36. In the present embodiment, each first material transfer device 33 includes four suction cup units 37 mounted on the connecting plate 36, and each second material transfer device 34 includes four suction cup units 37 mounted on the connecting plate 36.

Further, the second laser cutting device 40 further includes a second rotating device 42, and a second feeding station 431, a CCD detection station 432, a second cutting station 433, and a second discharging station 434 distributed around the second rotating device 42; the second feeding station 431 is in butt joint with the pre-positioning device 30, the CCD detecting device 44 is arranged on the CCD detecting station 432, and the second laser cutter 41 is arranged on the second cutting station 433. The CCD detection device 44 is used for detecting the position information of the sheet on the CCD detection station 432 and feeding back the position information to the second picosecond or femtosecond laser cutting system, so that the scanning path of a galvanometer in the second picosecond or femtosecond laser cutting system can be adjusted according to the fed-back information, accurate cutting is realized, and a fine positioning effect is achieved.

Specifically, the rotating end of the second rotating device 42 is fixedly connected with four material loading seats 45, and the four material loading seats 45 are circumferentially distributed along the axis of the rotating end. After the first material transfer device 33 or the second material transfer device 34 places the corrected sheet 02 on the material loading seat 45, the second rotating device 42 drives the material loading seat 45 to sequentially pass through the CCD detection station 432, the second cutting station 433 and the second blanking station 434, so as to complete fine positioning, cutting and blanking.

Further, the positive electrode sheet production apparatus 100 and the negative electrode sheet production apparatus 200 each further include a feeding device 10 for transporting the coil stock 01, and a discharging device 50 for conveying the prepared positive electrode sheet or negative electrode sheet to the lamination apparatus 300.

The feeding device 10 includes a roller for storing the roll material 01, a roller for tensioning the roll material 01, a motor for driving the roller to rotate, and the like, and when the roll material 01 is conveyed to the first laser cutting device 20, the roller is driven to rotate by the motor, and under the tensioning action of the roller, the tail end of the roll material 01 moves to the position of the first laser cutting device 20.

The specific sheet making process example of the positive electrode sheet making equipment 100/negative electrode sheet making equipment 200 is as follows:

firstly, the feeding device 10 discharges materials, the tail end of a coil material 01 extends to a first laser cutting device 20, the first laser cutting device 20 cuts out a sheet material 02 from the coil material 01 through two picosecond or femtosecond laser units 60, then the sheet material 02 is moved to a first feeding station 311 through parts such as a conveyor belt, and at the moment, the first material transfer device 33 or the second material transfer device 34 sucks the sheet material onto a corresponding correcting device 35, and after the correction is finished, the sheet material is moved to a material carrying seat 45 through the material transfer device; the material loading seat 45 is driven by the second rotating device 42, and sequentially passes through the detection station and the second cutting station 433, so that positioning and cutting of the tab 031 are completed, two cut pole pieces 03 are obtained, and then the material loading seat 45 is moved to the second blanking station 434 and is moved to the lamination device 300 through the blanking device 50.

Further, cleaning detection equipment 90 is respectively arranged between the blanking device 50 and the lamination equipment 300; the cleaning detection device 90 is used for detecting and cleaning the prepared positive pole piece or negative pole piece, and conveying the positive pole piece or negative pole piece which is qualified in detection and cleaned to the lamination device 300.

Specifically, the cleaning detection device 90 includes a detection device, a sorting device, and a cleaning device that are sequentially disposed.

Further, the laminating machine comprises a positive pole piece feeding device 61 connected with the positive pole piece production equipment 100, a negative pole piece feeding device 62 connected with the negative pole piece production equipment 200, a laminating device 70 for laminating the positive pole piece conveyed by the positive pole piece feeding device 61 and the negative pole piece conveyed by the negative pole piece device, and a gluing device 80 for gluing the laminated battery.

Further, the positive pole piece conveying device and/or the negative pole piece conveying device comprises a first vacuum conveying belt 04, a second vacuum conveying belt 05, a knockout mechanism 07 and a third vacuum conveying belt 06; the first vacuum conveyer belt 04 and the second vacuum conveyer belt 05 are sequentially arranged along a straight line direction; the third vacuum conveying belt 06 is arranged below the second vacuum conveying belt 05 and is perpendicular to the second vacuum conveying belt 05, a part of conveying section of the third vacuum conveying belt 06 is overlapped with the second vacuum conveying belt 05 in the vertical direction, and the third vacuum conveying belt 06 is used for conveying the positive pole piece or the negative pole piece to the stacking device 70; the second vacuum conveying belt 05 is arranged above the first vacuum conveying belt 04 and is provided with a part of conveying section which is overlapped with the first vacuum conveying belt 04 in the vertical direction; under the action of the first vacuum conveyer belt 04 and the second vacuum conveyer belt 05, the positive pole piece or the negative pole piece can be transferred to the second conveyer belt from a conveying section, which is overlapped with the second vacuum conveyer belt 05, on the first vacuum conveyer belt 04 or transferred to the first vacuum conveyer belt 04 from a conveying section, which is overlapped with the first vacuum conveyer belt 04, on the second vacuum conveyer belt 05; the knockout mechanism 07 is installed at a conveying section position on the second vacuum conveying belt 05 overlapped with the third vacuum conveying belt 06, and is used for dropping the positive pole piece or the negative pole piece on the second vacuum conveying belt 05 to the third vacuum conveying belt 06.

Positive pole piece conveyor and/negative pole piece conveyor pass through this design of the aforesaid, new pole piece 03 mode of transportation has been realized, carry pole piece 03 through first vacuum conveyer belt 04 up earlier, when pole piece 03 reachs the repetitive region of first vacuum conveyer belt 04 and second vacuum conveyer belt 05 on first vacuum conveyer belt 04, shift to second vacuum conveyer belt 05, begin to carry down through second vacuum conveyer belt 05, when pole piece 03 reachs the region of second vacuum conveyer belt 05 with the coincidence of third vacuum conveyer belt 06, shift to the third conveyer belt fast by the effect of knockout mechanism, the rethread third conveyer belt is carried to stacking platform device 70 and is piled up. This kind of transportation, the dwell time of reduction conveyer belt that can be very big to avoid circumstances such as putty, hourglass material, mistake material, very big improvement pole piece 03 carry toward the efficiency of folding a device 70, more importantly, this conveyer's design can realize that conveyor of unlimited quantity splices in proper order along a straight line direction, thereby can realize a plurality of folding a device 70 simultaneous workings, further improves the production efficiency of lamination battery. In this implementation, the knockout device can be a material rejecting device used on the vacuum conveying device, and is not particularly limited.

The picosecond or femtosecond laser cutting system with the laser power of 250W-1000W in the application is applied to cutting of a nickel cobalt lithium manganate battery anode material, a lithium iron phosphate battery anode material, a lithium cobaltate battery anode material, a lithium manganate battery anode material, a lithium nickel cobalt lithium aluminate battery anode material, a manganese phosphate lithium battery anode material, a lithium manganese iron phosphate battery anode material and a sodium ion battery anode material aiming at an anode plate material, and can obtain better flaking efficiency and flaking quality.

The above detailed description is provided for the all-laser sheet-making, cutting and folding all-in-one machine provided in the present application, and for those skilled in the art, there may be variations in the specific implementation and application scope according to the ideas of the embodiments of the present application, and in summary, the content of the present specification should not be construed as limiting the present application.

Claims

1. Full laser system piece is cut and is folded all-in-one, its characterized in that includes: the device comprises positive pole piece manufacturing equipment for preparing a positive pole piece, negative pole piece manufacturing equipment for preparing a negative pole piece and laminating equipment for laminating the positive pole piece and the negative pole piece;

the laser power of a laser cutter in the first picosecond or femtosecond laser cutting system is 250W-1000W;

the first picosecond or femtosecond laser cutting system and the second picosecond or femtosecond laser cutting system respectively comprise a first laser cutting device and a second laser cutting device;

the first laser cutting device comprises a first laser cutter;

the second laser cutting device comprises a second laser cutter;

2. The all-laser slicing, cutting and stacking all-in-one machine according to claim 1, wherein the first laser cutter and the second laser cutter of the positive electrode sheet production equipment are picosecond or femtosecond laser cutters with power of 250W-1000W.

3. The all-laser sheet-making, slicing and stacking all-in-one machine according to claim 1, wherein the laser power in the second picosecond or femtosecond laser cutting system is 250W-1000W for a picosecond or femtosecond laser cutter.

4. The all-laser sheet-making, cutting and stacking all-in-one machine according to claim 2, wherein the width of each sheet is equal to the sum of the widths of n positive electrode plates or negative electrode plates obtained by cutting the sheet, and n is not less than 1 and is a natural number.

5. The all-laser sheeting, cutting and stacking all-in-one machine of claim 2, wherein the first laser cutter comprises at least two laser units;

6. The all-laser sheet cutting and stacking all-in-one machine according to claim 2, wherein the second laser cutter comprises at least two laser units;

7. The all-laser slicing, cutting and stacking all-in-one machine according to claim 2, wherein the positive electrode sheet making equipment and the negative electrode sheet making equipment further comprise pre-positioning devices;

8. The full-laser sheet cutting and folding all-in-one machine according to claim 7, wherein the pre-positioning device comprises a first rotating device and a first feeding station, a first positioning station, a first discharging station and a second positioning station which are sequentially distributed around the first rotating device at equal angles;

9. The all-laser slicing, cutting and stacking machine according to claim 8, wherein the correction device comprises a detection unit and a displacement unit which are distributed from top to bottom.

10. The all-laser slicing, cutting and stacking all-in-one machine according to claim 9, wherein a connecting plate is fixedly connected to a rotating shaft of the first rotating device, and the first material transfer device and the second material transfer device are fixedly connected to the rotating shaft through the connecting plate.

11. The all-laser slicing, cutting and stacking all-in-one machine according to claim 10, wherein the connecting plate is in a cross shape, two adjacent ends of the connecting plate are respectively provided with the first material transfer device, and the other two adjacent ends of the connecting plate are respectively provided with the second material transfer device.

12. The all-laser slicing, cutting and stacking machine according to claim 11, wherein the first material transfer device and the second material transfer device each comprise a suction cup unit mounted on the connecting plate.

13. The full-laser slicing, cutting and stacking all-in-one machine according to claim 7, wherein the second laser cutting device further comprises a second rotating device, and a second feeding station, a CCD detection station, a second cutting station and a second discharging station which are distributed around the second rotating device;

14. The all-laser slicing, stacking and integrating machine according to any one of claims 1 to 13, wherein the positive electrode sheet-making equipment and the negative electrode sheet-making equipment comprise a feeding device for conveying a coil stock, and a discharging device for conveying the prepared positive electrode sheet or negative electrode sheet to the laminating equipment.

15. The all-laser sheet-making, cutting and stacking all-in-one machine according to claim 14, wherein cleaning and detecting devices are respectively arranged between the blanking device and the sheet stacking device;

16. The all-laser sheet-making, cutting and stacking all-in-one machine according to claim 15, wherein the cleaning detection device comprises a detection device, a sorting device and a cleaning device which are arranged in sequence.

17. The all-laser slicing, cutting and stacking all-in-one machine according to claim 1, wherein the slicing machine comprises a positive pole piece feeding device connected with the positive pole piece production equipment, a negative pole piece feeding device connected with the negative pole piece production equipment, a stacking device for stacking the positive pole piece conveyed by the positive pole piece feeding device and the negative pole piece conveyed by the negative pole piece device, and a gluing device for gluing the stacked batteries.

18. The all-laser slicing, cutting and stacking all-in-one machine according to claim 17, wherein the positive electrode plate conveying device and/or the negative electrode plate conveying device comprises a first vacuum conveying belt, a second vacuum conveying belt, a knockout mechanism and a third vacuum conveying belt;

the knockout mechanism is arranged on the second vacuum conveying belt at a conveying section position overlapped with the third vacuum conveying belt and is used for dropping the positive pole piece or the negative pole piece on the second vacuum conveying belt to the third vacuum conveying belt.