CN114243124A

CN114243124A - Lug shaping method, lug shaping equipment and battery cell processing system

Info

Publication number: CN114243124A
Application number: CN202111584353.7A
Authority: CN
Inventors: 江桦锐; 赵盛宇; 张松岭; 梁辰; 谢珩; 吴磊; 贵仁琦; 蓝维嘉; 陈胜德
Original assignee: Shenzhen Hymson Laser Intelligent Equipment Co Ltd
Current assignee: Shenzhen Hymson Laser Intelligent Equipment Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-03-25

Abstract

The utility model relates to the technical field of battery manufacturing, and provides a tab shaping method, tab shaping equipment and a battery cell processing system. The material loading, unloading and transferring operations among all working procedures in the conventional process are omitted, so that the production process is optimized. Bending and smoothing of utmost point ear in order can make utmost point ear keep buckling towards the middle part of rolling up the core, avoid utmost point ear damage or in disorder to can improve the rotational speed of rolling up the needle correspondingly, thereby show and improve winding efficiency, be of value to and improve electric core production efficiency.

Description

Lug shaping method, lug shaping equipment and battery cell processing system

Technical Field

The utility model relates to the field of battery manufacturing, in particular to a tab shaping method, tab shaping equipment and a battery cell processing system.

Background

Along with the rapid development of lithium batteries, the production efficiency and the product quality of the batteries are required to be higher, in the manufacturing process of the batteries, the winding efficiency of a battery core and the quality after winding are the key factors influencing the production efficiency and the product quality of the batteries, in the related technology, the poor phenomena of tab folding, disorder and the like are easily caused when the battery core is wound, the tab is damaged, the poor tab needs to be checked, repaired, shaped and the like after the winding is finished, the production efficiency is lower, and the damaged tab seriously influences the quality of the batteries.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a pole lug reshaping method which can reshape a pole lug in a winding process and is beneficial to improving the production efficiency and quality of a battery cell.

The utility model also provides tab shaping equipment and a battery cell processing system with the tab shaping equipment.

The tab reshaping method according to the embodiment of the first aspect of the utility model comprises the following steps:

conveying the pole piece material belt to a winding needle through a conveying device, and rotating the winding needle to wind the pole piece material belt to form a winding core;

on the conveying path of the pole piece material belt, before the pole piece material belt is rolled, the pole lugs of the pole piece material belt are bent towards the inner side of the pole piece material belt;

in the winding process of the winding needle, flattening the lug wound on the winding needle towards the end part of the winding core at the set position of the end part of the winding core until the winding core is wound to the set thickness and stopping winding;

discharging the winding core wound to the set thickness, and flattening the tab at the end of the winding core towards the end of the winding core.

The method for reshaping the tab of the embodiment of the utility model at least has the following beneficial effects: according to the method, the tab is bent before the pole piece material belt is wound, the tab is flattened during winding, and the tab is flattened after winding, so that the tab can be bent, shaped and wound on line under the condition that a machine platform does not stop, the defects of tab folding, wrinkling, disorder and the like are avoided, the work of subsequent inspection, repair, shaping and the like is omitted, and the production efficiency of the battery is improved.

According to some embodiments of the utility model, in the winding process of the winding needle, at the joint of the pole piece material belt to be wound and the winding core wound on the winding needle, the lug of the pole piece material belt and the lug of the winding core are shielded, so that the mutual interference between the lug of the pole piece material belt and the lug of the winding core during winding is avoided.

An embodiment of a second aspect of the present invention provides a tab shaping device, including:

the winding device comprises a winding mechanism and a lug flattening mechanism, wherein the winding mechanism comprises a winding needle and a winding needle driving assembly for driving the winding needle to rotate, the winding needle is used for winding a pole piece material belt and a diaphragm material belt to form a winding core, the pole piece material belt is provided with an inner side and an outer side, the inner side of the pole piece material belt faces the winding needle when the pole piece material belt is wound, and the lug flattening mechanism is used for flattening the lug of the winding core towards the end part of the winding core;

the conveying device is used for respectively conveying the pole piece material belt and the diaphragm material belt to the winding needle;

the pole lug bending device is arranged on a conveying path of the pole piece material belt and is used for bending the pole lugs of the pole piece material belt towards the inner side direction before the pole pieces are brought into a coil; and the number of the first and second groups,

utmost point ear flattening device, including bearing mechanism and pressing means, it includes and holds carrier, it is used for bearing to hold carrier the lateral part of core to hold carrier, pressing means includes the press head and presses drive assembly, the press head correspond to the tip of rolling up the core, it is used for the drive to press drive assembly the press head is relative hold carrier removal in order to be close to the tip of rolling up the core, the press head can court the tip of rolling up the core is pressed the utmost point ear of rolling up the core.

The tab reshaping device in the embodiment of the second aspect of the utility model has at least the following beneficial effects: the tab bending device can roll and bend the tabs of the pole piece material belt in the tape feeding process without stopping before winding, and flatten the bent tabs wound on the winding needle through the tab flattening mechanism when the pole piece material belt is wound, the impact of the tabs on the tab flattening mechanism when the winding core is wound can be effectively eliminated by the bent tabs, the tabs are bent towards the inner side direction of the pole piece material belt, the tab flattening mechanism is helpful to flatten the tabs towards the same side, and the adverse phenomena of tab folding, disorder and the like in the winding process can be effectively avoided after the tabs are flattened, so that the purpose of not damaging the tabs is achieved. The roll up core that convolutes the completion can flatten utmost point ear to the terminal surface of rolling up the core through utmost point ear flattening device to carry out next step's process, thereby improve the coiling quality of rolling up the core, help improving the production efficiency of electric core.

According to some embodiments of the utility model, the tab flattening mechanism comprises a bracket and a first guide mechanism, the bracket is connected to the frame, the bracket is provided with a mounting part, the first guide mechanism comprises a fixing part, the fixing part is located at a tab extending end of the winding core and connected to the mounting part, the fixing plate comprises a feeding end and a discharging end along the circumferential direction of the winding needle, the tab of the winding core can enter between the fixing part and the end part of the winding core from the feeding end along with the rotation of the winding needle and can move out from the discharging end, and the fixing part is used for flattening the tab of the winding core towards the end part of the winding core.

According to some embodiments of the utility model, the side of the fixture towards the end of the reeling core has a guide surface, the distance between the guide surface and the end of the reeling core decreases from the feed end towards the discharge end, the guide surface being adapted to smooth the tab of the reeling core towards the end of the reeling core.

According to some embodiments of the present invention, the tab flattening mechanism further includes a second guiding mechanism, the second guiding mechanism includes a movable member and a driving component, the movable member is disposed on one side of the winding needle corresponding to an end portion of the winding core having the tab, the movable member includes a connecting portion and a guiding portion, the connecting portion is connected to the mounting portion, the guiding portion is disposed on one side of the feeding end and can be shielded between the tab of the winding core and the tab of the pole piece material strip at a joint of the winding core and the pole piece material strip to be wound, and the driving component is configured to drive the movable member to move relative to the fixing member until the guiding portion is disposed at the joint.

According to some embodiments of the present invention, the driving assembly includes a driving element and a connecting plate, the connecting plate is connected to the mounting portion, the connecting plate is provided with a guide slot, a guide post is connected to the connecting portion, the guide post is inserted into the guide slot and can move along the guide slot, the driving element is used for driving the connecting portion to move, and the guide slot is used for limiting a moving path of the guide post.

According to some embodiments of the utility model, the tab bending device comprises a roller mechanism and a roller pressing mechanism, the roller mechanism is used for supporting the outer side of the pole piece material belt and conveying the pole piece material belt, a concave die is arranged on the roller mechanism corresponding to a tab of the pole piece material belt, an opening of the concave die faces the inner side of the pole piece material belt, and the roller pressing mechanism is corresponding to the concave die and used for rolling and bending the tab on the concave die.

According to some embodiments of the utility model, the tab bending device further comprises a mounting base and a pressing roller pressing mechanism, the pressing roller pressing mechanism and the roller passing mechanism are both arranged on the mounting base, the pressing roller pressing mechanism is used for pressing the pole piece material belt on the roller passing mechanism, the roller pressing mechanism is arranged on the pressing roller pressing mechanism, and the roller pressing mechanism, the roller pressing mechanism and the pole piece material belt can move at equal linear velocity.

According to some embodiments of the utility model, the carrier is configured to carry a plurality of winding cores, the pressing head is correspondingly located at a set position of the carrier, and the carrier mechanism further comprises a conveying assembly configured to drive the carrier to move relative to the pressing head so as to convey the winding cores to a position corresponding to the pressing head.

According to some embodiments of the utility model, the delivery device comprises:

the positive plate conveying mechanism is used for conveying a positive plate material belt to the winding needle;

the negative plate conveying mechanism is used for conveying a negative plate material belt to the winding needle, positive lugs on the positive plate material belt and negative lugs on the negative plate material belt respectively face opposite directions along the axial direction of the winding needle, and the positive lugs and the negative lugs on the winding needle are respectively faced to two ends of the winding core;

the first diaphragm conveying mechanism is used for conveying the diaphragm material belt to the winding needle between the positive plate material belt and the negative plate material belt; and the number of the first and second groups,

and the second diaphragm conveying mechanism is used for conveying the diaphragm material belt to the winding needle between the pole piece material belt and the winding needle.

According to some embodiments of the present invention, the winding needle is configured to wind a positive electrode sheet material strip, a negative electrode sheet material strip, and a separator material strip to form a winding core, the positive electrode sheet material strip and the negative electrode sheet material strip respectively have an inner side and an outer side, and the inner sides of the positive electrode sheet material strip and the negative electrode sheet material strip face the winding needle when the winding core is wound;

the winding device is provided with the lug flattening mechanisms corresponding to the two ends of the winding core respectively and used for flattening the positive lugs and the negative lugs at the two ends of the winding core towards the end part of the winding core;

the tab bending device is arranged on a conveying path of the positive plate material belt and used for bending the positive tabs towards the inner side of the positive plate material belt;

the pole ear bending device is also arranged on the conveying path of the negative pole piece material belt and used for bending the negative pole ears towards the inner side of the negative pole piece material belt.

The battery cell processing system according to the third aspect of the present invention includes a laser cutting device and the tab shaping device according to the second aspect of the present invention, where the laser cutting device is disposed on a conveying path of the pole piece material strap between the conveying device and the tab bending device, and is configured to process a tab on the pole piece material strap.

The battery cell processing system of the embodiment of the third aspect of the utility model at least has the following beneficial effects: the electric core processing system cuts the lug on line through the laser cutting device, and the lug is bent before the material belt is wound through the lug shaping equipment, the lug is flattened during winding, and the lug is flattened after winding, so that the lug can be cut, bent on line, shaped, wound and flattened under the condition of no shutdown, the transfer process is reduced, and the production efficiency is improved.

According to some embodiments of the utility model, the laser cutting device comprises a laser head, a feeding device, a cutting supporting plate and a waste separating device, the feeding device comprises a feeding roller and a discharging roller which are arranged at intervals, the cutting supporting plate is arranged between the feeding roller and the discharging roller, a first negative pressure port, a second negative pressure port and a third negative pressure port are sequentially arranged on the cutting supporting plate along the conveying direction of the pole piece material belt, the laser head can cut the material belt passing through the second negative pressure port, and the waste separating device can separate the cut and separated waste from the material belt.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic structural diagram of a tab shaping device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a tab bending device in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a tab bending device (with a motor added) in an embodiment of the present invention;

fig. 4 is a schematic structural view of a tab bending device (with a transmission member added) according to another embodiment of the present invention;

fig. 5 is a partial schematic view of a structure of a female die and a male die in a tab bending apparatus according to an embodiment of the present invention;

fig. 6 is a partial schematic view showing another structure of a female die and a male die in the tab bending apparatus according to the embodiment of the present invention;

fig. 7 is a partial schematic view showing another structure of a female die and a male die in the tab bending apparatus according to the embodiment of the present invention;

FIG. 8 is a schematic view of a winding apparatus according to an embodiment of the present invention;

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a schematic view of FIG. 9 taken along line A;

FIG. 11 is an enlarged view of a portion of FIG. 10 at B;

FIG. 12 is a schematic structural view of a fixing member according to an embodiment of the present invention;

FIG. 13 is a schematic structural view of the moveable member in an embodiment of the present invention;

FIG. 14 is a schematic view showing the change in position of the junction of the pole piece web and the core as the thickness of the core increases;

FIG. 15 is a schematic view of the handling apparatus of the embodiment of FIG. 1;

fig. 16 is a schematic view of a tab flattening device in the embodiment of fig. 1

Fig. 17 is a schematic structural diagram of a cell processing system according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of the laser cutting apparatus in the embodiment of FIG. 17;

FIG. 19 is a schematic view of the laser cutting apparatus of the embodiment of FIG. 17;

FIG. 20 is a right side view of FIG. 17;

FIG. 21 is a schematic structural view of the dust removing blade assembly, the front dust removing cover and the waste separating device in the embodiment of FIG. 17;

FIG. 22 is a schematic view of a cutting blade in the laser cutting apparatus;

FIG. 23 is a cross-sectional view taken along section C-C of FIG. 22;

fig. 24 is a front view of a pole piece strip of the present invention prior to tab processing;

fig. 25 is a front view of the pole piece strip of the present invention after processing the tabs with a laser cutting device.

Reference numerals:

the electrode plate comprises a roll core 1, a pole piece material belt 2, an edge area 21, waste materials 22, a pole lug 3 and a diaphragm material belt 4;

a winding device 100;

the winding needle 110, the bracket 120, the first guide mechanism 130, the fixed part 131, the feeding end 132, the discharging end 133, the guide surface 134, the second guide mechanism 140, the movable part 141, the connecting part 142, the guide part 143, the guide edge 144, the shielding surface 145, the driving assembly 146, the gear 1461, the rack 1462, the connecting plate 147, the guide groove 148, the guide column 149, the joint 150 and the joint position change curve 151;

a conveying device 200;

the positive plate conveying mechanism 210, the negative plate conveying mechanism 220, the first diaphragm conveying mechanism 230, the second diaphragm conveying mechanism 240 and the tensioning roller 250;

a tab bending device 300;

the device comprises a mounting base 310, a roller passing mechanism 320, a female die 321, a roller passing wheel 322, a roller passing shaft 323, a roller pressing mechanism 330, a first driving piece 331, a first output end 3311, a support 332, a first roller 333, a roller pressing mechanism 340, a second driving piece 341, a second output end 3411, a first connecting piece 342, a first connecting end 3421, a second connecting end 3422, a second roller 343, a male die 3431, a first motor 344, a third output end 3441, a transmission piece 345, a first gear 3451 and a second gear 3452;

a tab flattening device 400;

the bearing mechanism 410, the bearing 411, the conveying assembly 412, the pressing mechanism 420, the pressing head 421, the pressing driving assembly 422 and the pressing support 423;

a laser cutting device 500;

the device comprises a laser head 510, a feeding device 520, a frame 521, a feeding roller 522, a discharging roller 523, a dust removal knife assembly 530, a front dust removal cover 540, a side dust removal cover 550, a waste separation device 560, a driving device 561, a driving roller 562, a belt 563, a through hole 5631, a driven roller 564, a cutting supporting plate 570, a first negative pressure port 571, a second negative pressure port 572 and a third negative pressure port 573;

the device comprises a carrying device 600, a clamping jaw 610, a clamping jaw opening and closing mechanism 620 and a moving mechanism 630.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiment of the first aspect of the utility model provides a tab shaping method, which comprises the following steps: conveying the pole piece material belt to a winding needle through a conveying device, and rotating the winding needle to wind the pole piece material belt to form a winding core; on the conveying path of the pole piece material belt, before the pole piece material belt is rolled, the pole lugs of the pole piece material belt are bent towards the inner side of the pole piece material belt; winding the inner side of the pole piece material belt towards the direction of a winding needle, flattening a lug wound on the winding needle towards the end part of a winding core at a set position of the end part of the winding core in the winding process of the winding needle, and stopping winding until the winding core is wound to a set thickness; discharging the winding core wound to the set thickness, and flattening the tab at the end of the winding core towards the end of the winding core. According to the method, the tab is bent before the pole piece material belt is wound, the tab is flattened during winding, and the tab is flattened after winding, so that the tab can be bent, shaped and wound on line under the condition that a machine platform does not stop, the defects of tab folding, wrinkling, disorder and the like are avoided, the work of subsequent inspection, repair, shaping and the like is omitted, and the production efficiency of the battery is improved. The utmost point ear in pole piece material area is bent towards the inboard in pole piece material area, convolutes the inboard orientation book needle direction in pole piece material area to the utmost point ear that the messenger went into to roll up on the book needle all buckles towards the book needle direction, thereby be convenient for smooth and the operation of flattening of utmost point ear, and, the coiling in-process, roll up each layer utmost point ear of core and can stratify in order, avoid the staggered floor between utmost point ear layer.

In addition, in the conventional tab winding process, because the tab wound on the winding needle is easy to turn up, disorder or interfere with the tab to be wound due to centrifugal force, the winding speed needs to be limited within a certain range, and the tab shaping method of the utility model can avoid the poor phenomena of turning up, folding, disorder and the like of the tab of the winding core due to the action of the winding centrifugal force when being applied to the production of a battery cell, therefore, compared with the conventional tab winding process, the winding speed can be further improved, for example, the rotating speed of the winding needle is increased, and therefore, the winding efficiency can be obviously improved.

In the method, the lug of the pole piece material belt and the lug of the winding core can be shielded at the joint of the pole piece material belt to be wound and the winding core wound on the winding needle in the winding process of the winding needle, so that the mutual interference between the lug of the pole piece material belt and the lug of the winding core in the winding process is avoided. When coiling, each layer of the pole lugs on the coiling core are bent to the coiling needle direction to form the same angle, so that the pole lugs on different layers can be mutually interfered, and the pole lugs in the pole piece material belt to be coiled and the coiling core pole lugs can be shielded, so that the defects that the pole lugs are disordered and turned over due to mutual collision of the pole lugs on different layers can be avoided, and the pole lugs are orderly layered.

Fig. 1 is a schematic structural diagram of a tab shaping apparatus according to an embodiment of the present invention, and referring to fig. 1, a second aspect of the present invention provides a tab shaping apparatus, including a winding device 100, a conveying device 200, a tab bending device 300, and a tab flattening device 400, where the winding device 100 is configured to wind a pole piece material strip 2, the conveying device 200 is configured to convey the pole piece material strip 2 and a membrane material strip 4 to the winding device 100, the tab bending device 300 is configured to bend a tab 3 on the pole piece material strip 2, and the tab flattening device 400 is configured to flatten the tab 3 of a wound core 1 toward an end of the wound core 1 so as to enter a next processing procedure.

Wherein, take-up device 100 includes winding mechanism and utmost point ear and smooths the mechanism, and winding mechanism includes winding needle 110 and is used for driving winding needle 110 pivoted winding needle drive assembly, and winding needle 110 is used for winding pole piece material area 2 and diaphragm material area 4 and forms a book core 1, and pole piece material area 2 has inboard and outside, and pole piece material area 2's inboard orientation winding needle 110 when going into to roll up, utmost point ear smooths the mechanism and is used for smoothing the end that the utmost point ear 3 orientation that rolls up core 1 was rolled up to utmost point ear. And the conveying device 200 is used for conveying the pole piece material belt 2 and the diaphragm material belt 4 to the winding needle 110 respectively.

The tab bending device 300 is disposed on the conveying path of the pole piece material strip 2, and the tab bending device 300 is configured to bend the tab 3 of the pole piece material strip 2 towards the inside direction before the pole piece material strip 2 is wound. Utmost point ear bending device 300 can bend the utmost point ear 3 of the pole piece material area 2 of tape transport in-process before coiling without shutting down, the utmost point ear 3 of bending can effectively eliminate the impact that utmost point ear 3 received in utmost point ear smoothing mechanism department when rolling up 1 coiling of core, and utmost point ear 3 bends towards the inboard direction in pole piece material area 2, and smooth the utmost point ear 3 of bending of rolling up on book needle 110 through utmost point ear smoothing mechanism when pole piece material area 2 is coiled, help utmost point ear smoothing mechanism to smooth 3 orientation homonymies of utmost point ear, can effectively avoid coiling in-process utmost point ear 3 to turn over a book after utmost point ear 3 smoothes, the fold, bad phenomenon such as disorder, avoid utmost point ear 3 damage.

The tab flattening device 400 includes a bearing mechanism 410 and a pressing mechanism 420, the bearing mechanism 410 includes a bearing member 411, the bearing member 411 is used for bearing the side portion of the winding core 1, the pressing mechanism 420 includes a pressing head 421 and a pressing driving assembly 422, the pressing head 421 corresponds to the end portion of the winding core 1, the pressing driving assembly 422 is used for driving the pressing head 421 to move relative to the bearing member 411 so as to be close to the end portion of the winding core 1, and the pressing head 421 can press the tab 3 of the winding core 1 towards the end portion of the winding core 1. Therefore, the wound core 1 can flatten the tab 3 to the end surface of the core 1 by the tab flattening device 400, so that the next process can be performed.

Therefore, the lug 3 shaping equipment provided by the embodiment of the utility model bends the lug 3 before winding, flattens the lug 3 during winding, flattens the lug 3 after winding is completed, can be carried out in the conveying process of the pole piece material belt 2 without stopping operation, and avoids material transfer, loading and unloading and other operations among multiple processes, thereby improving the production efficiency of the battery cell. The above-mentioned bad phenomenon can be avoided appearing in utmost point ear 3 to 3 plastic of utmost point ear, effectively improves the coiling quality of rolling up core 1. In addition, the bent and flattened tab 3 can avoid the phenomena of eversion, folding, disorder and the like caused by the centrifugal force during winding, so that compared with the conventional tab 3 winding process, when the tab 3 shaping equipment provided by the embodiment of the utility model is used for production, the winding speed can be further increased, for example, the rotating speed of the winding needle 110 is increased, and therefore, the winding efficiency can be remarkably improved.

In some embodiments, the winding mechanism may include 1 winding needle 110 to form a single-station winding mechanism, or the winding mechanism may include a plurality of winding needles 110 to form a multi-station winding mechanism, for example, may include 2 or 3 winding needles 110, and may rotate other winding needles 110 to continue winding after winding at one station is completed, and may simultaneously blank the winding core 1 that is completely wound, thereby avoiding the time taken by the winding mechanism to blank, and effectively improving the efficiency of winding and shaping the tab 3.

Fig. 2 to 7 show a structure diagram of a tab bending device in some embodiments. Referring to fig. 2, in some embodiments, the tab bending apparatus 300 includes a roller mechanism 320 and a roller pressing mechanism 340, the roller mechanism 320 is configured to support an outer side of the pole piece material strip 2 and convey the pole piece material strip 2, a concave die 321 is disposed on the roller mechanism 320 at a position corresponding to a tab 3 of the pole piece material strip 2, an opening of the concave die 321 faces an inner side of the pole piece material strip 2, the roller pressing mechanism 340 is configured at a position corresponding to the concave die 321 and is configured to roll and bend the tab 3 on the concave die 321, thereby the tab 3 of the pole piece material strip 2 can be bent towards the inner side of the pole piece material strip 2, after the pole piece material strip 2 is rolled and the winding needle 110 forms the winding core 1, the tab 3 facing the inner side of the pole piece material strip 2 is all bent towards the winding needle 110, which can effectively avoid being turned over outwards along with the rotation of the winding core 1, so that the tab flattening mechanism presses the end face of the winding core 1 towards the same side at the winding apparatus 100, the damage of the tab 3 is avoided.

Referring to fig. 2, in some embodiments, the tab bending apparatus 300 further includes a mounting base 310 and a pressing roller pressing mechanism 330, the pressing roller pressing mechanism 330 and the roller passing mechanism 320 are both disposed on the mounting base 310, the pressing roller pressing mechanism 330 is configured to press the pole piece material strip 2 onto the roller passing mechanism 320, the roller pressing mechanism 340 is disposed on the pressing roller pressing mechanism 330, and the roller passing mechanism 320, the roller pressing mechanism 340 and the pole piece material strip 2 are capable of moving at a constant linear velocity. The pressing roller pressing mechanism 330 is located on one side of the pole piece material belt 2 facing the inner side of the pole piece material belt 320, and the pressing roller pressing mechanism 330 can apply pressure from the inner side of the pole piece material belt 2, so that the pressing roller pressing mechanism 330 can press the pole piece material belt 2 on the pressing roller mechanism 320. The roller pressing mechanism 340 is arranged on the pressing roller pressing mechanism 330, the roller pressing mechanism 340 is located at the position, corresponding to the tab 3, of the pressing roller pressing mechanism 330, when the roller pressing mechanism 340 rolls and bends the tab 3 located on the female die 321, the pressing roller pressing mechanism 330, the roller pressing mechanism 340 is in contact with the inner side of the pole piece material belt 2, the roller passing mechanism 320 is in contact with the outer side of the pole piece material belt 2, the pole piece material belt 2 can drive the roller passing mechanism 320 in the moving process, the pressing roller pressing mechanism 330 and the roller pressing mechanism 340 move at equal linear velocity, therefore, the tab 3 can be bent without stopping in the belt moving process of the pole piece material belt 2, the impact on the bending position of the tab 3 can be eliminated, and the purpose of not damaging the tab 3 is achieved.

Referring to fig. 2-4, in some embodiments, the pressure roller hold down mechanism 330 includes a first drive 331, a support 332, and a first roller 333. The upper end of the first driving member 331 is connected to the mounting base 310, the first driving member 331 has a first output end 3311, the support 332 is disposed at the first output end 3311, the roller passing mechanism 320 is located below the support 332, the first driving member 331 can drive the first output end 3311 to move up and down along the vertical direction, the first roller 333 is disposed at the lower end of the support 332, and the first roller 333 is rotatably connected to the support 332. It can be understood that, the first driving element 331 can drive the first roller 333 to move downward to compress the inner side surface of the pole piece material belt 2, the roller passing mechanism 320 supports the outer side surface of the pole piece material belt 2, when the pole piece material belt 2 moves, the pole piece material belt 2 drives the roller passing mechanism 320 and the first roller 333 to rotate synchronously, so that the first roller 333 rotates at a constant linear velocity with the roller passing mechanism 320, the compression roller compressing mechanism 330, the roller compressing mechanism 340 and the pole piece material belt 2 move at a constant linear velocity, and further the contact surface of the roller passing mechanism 320, the first roller 333 and the pole piece material belt 2 can rotate at a constant linear velocity.

Referring to fig. 2, in some embodiments, the roller press mechanism 340 includes a second driver 341, a first connector 342, and a second roller 343. The second driving element 341 is disposed on the support 332, the second driving element 341 is located at the left end of the support 332, the second driving element 341 has a second output end 3411, and the second driving element 341 can drive the second output end 3411 to move up and down in the vertical direction. The first connecting member 342 has a first connecting end 3421 and a second connecting end 3422, the first connecting end 3421 is located at the right end of the first connecting member 342, the second connecting end 3422 is located at the left end of the first connecting member 342, the first connecting end 3421 is rotatably connected to the support 332, the second connecting end 3422 is rotatably connected to the second roller 343, the first roller 333 is disposed on the first connecting end 3421, the second roller 343 is disposed on the second connecting end 3422, and the first roller 333 and the second roller 343 are fixedly connected to the first connecting member 342. A punch 3431 is arranged on the wheel surface of the second roller 343, the punch 3431 can be pressed into the die 321, the second driving member 341 can drive the second roller 343 to move vertically downwards, the wheel surface of the second roller 343 compresses the inner side surface of the pole piece material belt 2, the roller passing mechanism 320 supports the outer side surface of the pole piece material belt 2, the punch 3431 moves downwards to press the tab 3 into the die 321, when the pole piece material belt 2 moves, the pole piece material belt 2 drives the roller passing mechanism 320 and the first roller 333 to rotate synchronously, so that the first roller 333 and the roller passing mechanism 320 rotate at the same linear speed, the second roller 343 and the roller passing mechanism 320 rotate coaxially through the first connecting member 342, the first roller 333, the second roller 343 and the roller passing mechanism 320 rotate at the same linear speed under the driving of the pole piece material belt 2, the non-stop of the pole piece material belt 2 during the belt conveying process can be bent for the tab 3, and the impact on the tab 3 bending position can be eliminated, thereby achieving the purpose of not damaging the tab 3.

Referring to fig. 3, in other embodiments, the roller press mechanism 340 includes a second drive member 341, a first motor 344, a first link 342, and a second roller 343. The second driving element 341 is disposed on the support 332, the second driving element 341 is located at the left end of the support 332, the second driving element 341 has a second output end 3411, and the second driving element 341 can drive the second output end 3411 to move up and down in the vertical direction. The first motor 344 is disposed on the support 332, the first motor 344 has a third output end 3441, the left end of the first connecting member 342 is fixedly connected to the third output end 3441, the right end of the first connecting member 342 is rotatably connected to the second output end 3411, the second roller 343 is disposed on the first connecting member 342, the first motor 344 drives the second roller 343 to rotate via the first connecting member 342, a male mold 3431 is disposed on the wheel surface of the second roller 343, the male mold 3431 can be pressed into the female mold 321, and the second driving member 341 can drive the second roller 343 to move vertically and downwardly. The second driving member 341 is used for driving the second roller 343 to compress the tab 3, when the pole piece material belt 2 moves, the pole piece material belt 2 drives the roller mechanism 320 and the first roller 333 to rotate synchronously, the first motor 344 drives the second roller 343 and the pole piece material belt 2 to rotate synchronously, so that the first roller 333, the second roller 343 and the roller mechanism 320 rotate at the same linear speed, the first motor 344 drives the second roller 343 and the pole piece material belt 2, the roller mechanism 320 and the first roller 333 to move at the same linear speed, and the second roller 343 can roll and bend the tab 3 located between the male die 3431 and the female die 321.

Referring to fig. 4, in other embodiments, the roller press mechanism 340 includes a second driving member 341, a first connecting member 342, a transmission member 345, and a second roller 343. The second driver 341 is disposed on the support 332, the second driver 341 is located at the left end of the support 332, the second driver 341 has a second output 3411, and the second driver 341 can drive the second output 3411 to move up and down in the vertical direction. The right end of the first connecting piece 342 is rotatably connected with the second output end 3411, the left end of the first connecting piece 342 is rotatably connected with the support 332, the upper end of the transmission piece 345 is connected with the first connecting piece 342, the lower end of the transmission piece 345 is connected with the roller passing mechanism 320, the second roller 343 is arranged at the right end of the first connecting piece 342, a male die 3431 is arranged on the wheel surface of the second roller 343, the male die 3431 can be pressed into the female die 321, and the second driving piece 341 can drive the second roller 343 to vertically move downwards. When the pole piece material belt 2 moves, the pole piece material belt 2 drives the roller mechanism 320 to rotate, the roller mechanism 320 drives the first roller wheel 333 to rotate synchronously, the second roller wheel 343 rotates synchronously with the roller mechanism 320 through the transmission piece 345, so that the first roller wheel 333, the second roller wheel 343 and the roller mechanism 320 rotate at the same linear speed, the second roller wheel 343 is driven by the second driving piece 341 to compress the tab 3 along the vertical downward direction, the tab 3 between the male die 3431 and the female die 321 can be rolled and bent by the second roller wheel 343, the pole piece material belt 2 does not stop in the belt walking process and can be bent for the tab 3, the impact on the bending position of the tab 3 is eliminated, and the purpose of not damaging the tab 3 is achieved.

It should be noted that in some embodiments, the first driving member 331 and the second driving member 341 are both a cylinder (not shown) or a motor (not shown). It can be understood that the air cylinder can rapidly drive the output end, and can provide sufficient down force for the first roller 333 and the second roller 343, so that the first roller 333, the second roller 343, and the over-roller mechanism 320 can move at a constant linear velocity by friction with the pole piece material strip 2. The motor can smoothly drive the output terminal and can provide a stable down force to the first and

second rollers

333 and 343.

Referring to fig. 4, in some embodiments, the transmission member 345 includes a first gear 3451 and a second gear 3452, the roller passing mechanism 320 includes a roller passing wheel 322 and a roller passing shaft 323, the first gear 3451 is disposed on the first connecting member 342, the first gear 3451 is fixedly connected to a left end of the first connecting member 342, the second gear 3452 is disposed on the roller passing shaft 323, the second gear 3452 is connected to a left end of the roller passing shaft 323, and the first gear 3451 and the second gear 3452 are engaged to allow the first roller 333 and the roller passing wheel 322 to rotate synchronously. The right end of crossing roller axle 323 rotates with mounting base 310 to be connected, crosses running roller 322 and sets up on crossing roller axle 323, and die 321 sets up on the surface of crossing running roller 322 left end, and first gyro wheel 333 can press utmost point ear 3 on the surface of crossing running roller 322 right end, and second gyro wheel 343 can press pole piece material area 2 on the surface of crossing running roller 322 for second gyro wheel 343, cross running roller 322, first gyro wheel 333 and pole piece material area 2 do linear velocity motion such as.

Referring to fig. 5 to 7, in some embodiments, the shapes of the male die 3431 and the female die 321 can be customized according to the shape of the tab 3, and the shapes of the male die 3431, the female die 321, and the tab 3 include a circle, an inverted triangle, and an inverted trapezoid. It should be noted that the shapes of the punch 3431, the die 321 and the tab 3 exemplified above may be circular, inverted triangular or inverted trapezoidal, only for better illustrating that the punch 3431 and the die 321 have characteristics that can be customized according to the shape of the tab 3, and do not indicate or imply that the shapes of the punch 3431, the die 321 and the tab 3 referred to are only circular, inverted triangular and inverted trapezoidal, and thus, are not to be construed as limiting the present invention.

In some embodiments, the pole tab bending device 300 is provided with a tensioning roller 250 along one side or two sides of the conveying path of the pole piece material strip 2, so as to tension the pole piece material strip 2 passing through the pole tab bending device 300, thereby avoiding the problems of the pole piece material strip 2 such as being loosened and wrinkled, and affecting the bending of the pole tab 3 and the conveying of the pole piece material strip 2.

Fig. 8-14 illustrate schematic views of a tab flattening mechanism in some embodiments. Referring to fig. 8 to 11, in some embodiments, the tab flattening mechanism includes a bracket 120 and a first guide mechanism 130, the bracket 120 is connected to the machine frame, the bracket 120 is provided with a mounting portion, the first guide mechanism 130 includes a fixing member 131, the fixing member 131 is located at an extending end of the tab 3 of the winding core 1 and connected to the mounting portion, the fixing member includes a feeding end 132 and a discharging end 133 along a circumferential direction of the winding pin 110, the tab 3 of the winding core 1 can enter between the fixing member 131 and an end of the winding core 1 from the feeding end 132 and move out from the discharging end 133 along with rotation of the winding pin 110, and the fixing member 131 is used for flattening the tab 3 of the winding core 1 towards the end of the winding core 1. Wherein, the side of the fixing piece 131 facing the tab 3 is provided with a guide surface 134, thereby, a channel for the tab 3 to pass through is formed between the guide surface 134 and the end of the winding core 1 with the tab 3, the tab 3 can move relative to the fixing piece 131 along with the winding of the winding core 1, so that the tab can enter the channel from the feeding end 132 and move out of the channel from the discharging end 133.

Referring to fig. 11, in some embodiments, the distance between the guide surface 134 and the end of the winding core 1 is gradually reduced from the feeding end 132 to the discharging end 133, and therefore, the guide surface 134 can gradually extrude the tab 3 toward the end of the winding core 1 while the tab 3 moves in the channel until the tab 3 moves out of the discharging end 133, and the extruded tab 3 passing through the guide surface 134 can be bent toward the end surface of the winding core 1, so the guide surface 134 can flatten the tab 3 toward the end of the winding core 1 during winding, so that undesirable phenomena such as folding, wrinkling and disorder of the tab 3 during winding can be avoided, and damage to the tab 3 is effectively avoided, thereby contributing to improving the winding quality of the winding core 1. And, utmost point ear smooths the mechanism and can smooths the utmost point ear 3 of rolling up core 1 when the pole piece is convoluteed, consequently, when rolling up core 1 and coiling and accomplishing, the utmost point ear 3 of rolling up core 1 tip has also accomplished and has smoothed, and the utmost point ear 3 after smoothing is buckled in order towards rolling up needle 110, the operation of flattening of utmost point ear 3 of being convenient for.

Referring to fig. 8 and 9, in the above embodiment, the guide surface 134 of the fixing member 131 can cover a portion of the moving path of the tab 3, whereby the tab 3 wound on the winding pin 110 can be gradually flattened while passing through the guide surface 134. It should be noted that the size of the fixing member 131 from the feeding end 132 to the discharging end 133 can be reasonably configured by combining the rotating speed of the winding needle 110, the required pressing degree of the tab 3, the required thickness of the winding core 1 to be wound, and other factors, so as to ensure that the tab 3 can be gradually pressed and smoothed towards the end of the winding core 1 in a proper movement path, and avoid pressing the tab 3 to a large degree in an excessively short movement path. If the dimension of the fixing member 131 from the feeding end 132 to the discharging end 133 is too short, so that the portion of the guide surface 134 covering the moving path of the tab 3 is too short, and the path of the tab 3 passing through the guide surface 134 during winding is too short, the degree of the tab 3 being pressed in the unit path (i.e., the distance of the tab 3 being pressed toward the end of the winding core 1) is too large, it is difficult to ensure the leveling effect, and the tab 3 is easily damaged. In the tab flattening mechanism of this embodiment, the feeding end 132 and the discharging end 133 of the fixing member 131 are respectively located at two sides of the winding pin 110, so that the channel between the guide surface 134 and the end of the winding pin 1 extends to two sides of the circumference of the winding pin 110, and it is ensured that the channel has a proper length, therefore, the tab 3 wound on the winding pin 110 enters the channel from the feeding end 132 at one side of the winding pin 110, and is gradually extruded to the end of the winding pin 1 by the guide surface 134 in the channel along with the rotation of the winding pin 110, and the discharging end 133 at the other side of the winding pin 110 moves out of the channel, so that the flattening effect of the tab 3 can be ensured.

Referring to fig. 12, in the above embodiment, the fixing member 131 has a fan-shaped structure with the axis of the winding needle 110 as the central axis, and is adapted to the movement path of the tab 3 wound around the winding needle 110, the inner side of the fixing member 131 is provided with the slot for passing through the winding needle 110, so as to avoid interference, and the outer radius of the fixing member 131 is not less than the maximum radius of the winding core 1 to be wound, so that the tab 3 from the inner side to the outer side of the winding core 1 can be smoothed in the whole winding process of the winding core 1.

Referring to fig. 9 and 12, in the tab flattening mechanism of some embodiments, along the moving path of the tab 3, the thickness of the fixing member 131 gradually increases from the feeding end 132 to the discharging end 133, wherein the fixing member 131 may be connected to the mounting portion of the bracket 120 through a side away from the guide surface 134, or connected to the mounting portion through a connecting member, that is, the first guide mechanism 130 may further include a connecting member connected to the mounting portion and a side of the fixing member 131 away from the tab 3, so that the connecting position of the connecting member can be set reasonably according to the position of the winding pin 110 and the thickness of the winding core 1 to be wound, thereby ensuring that the guide surface 134 of the fixing member 131 corresponds to the end of the winding core 1. The fixing member 131 may be designed similar to an archimedes spiral to facilitate the processing of the fixing member 131. After the assembly, because of the change of thickness, the one side of mounting 131 towards rolling up core 1 is close to the tip of rolling up core 1 gradually from feed end 132 to discharge end 133, and the distance between the surface that mounting 131 faces to rolling up core 1 and the tip of rolling up core 1 is reduced to discharge end 133 by feed end 132 along the motion path of utmost point ear 3 promptly, forms foretell spigot surface 134 from this, forms the passageway that the size that stretches out the direction along utmost point ear 3 gradually diminishes between spigot surface 134 and the tip of rolling up core 1 to can push down the terminal surface of utmost point ear 3 towards rolling up core 1 gradually, realize utmost point ear 3 and smooth.

Referring to fig. 8 and 9, in some embodiments, the tab flattening mechanism further includes a second guiding mechanism 140, the second guiding mechanism 140 includes a movable member 141 and a driving component 146, the movable member 141 is disposed on one side of the winding needle 110 corresponding to an end of the winding core 1, the movable member 141 includes a connecting portion 142 and a guiding portion 143, the connecting portion 142 is connected to the mounting portion, the guiding portion 143 is disposed on one side of the feeding end 132, the guiding portion 143 can block between the tab 3 wound on the winding needle 110 and the tab 3 on the pole piece tape 2 to be wound at a joint 150 between the winding core 1 wound on the winding needle 110 and the pole piece tape 2 to be wound, mutual interference between the tab 3 of the winding core 1 wound on the winding needle 110 and the tab 3 to be wound can be effectively avoided, the driving component 146 is configured to drive the movable member 141 to move relative to the fixing member 131, so that the guide 143 remains at the junction 150 of the winding core 1 wound on the winding needle 110 and the strip 2 of pole pieces to be wound. Along with roll up the thickness that core 1 convoluteed and thicken gradually, drive assembly 146 orders about moving part 141 and moves for mounting 131 thereupon and makes guide portion 143 keep sheltering from between the utmost point ear 3 of rolling up on core 1 and the utmost point ear 3 of waiting to roll up, along with roll up the layer upon layer of winding of core 1, the mutual noninterference of utmost point ear 3 on the core 1 and the utmost point ear 3 of waiting to roll up can be guaranteed to sheltering from of guide portion 143 when coiling. When coiling, each layer utmost point ear 3 on the core 1 gets into the plane of guidance 134 and the passageway of rolling up 1 tip from the feed end 132 of mounting 131, when rolling up core 1 and coiling to utmost point ear 3 when the discharge end 133 of mounting 131 shifts out, the utmost point ear 3 of rolling up 1 upper and same circle layer is by the plane of guidance 134 towards the tip extrusion of rolling up core 1, make each utmost point ear 3 and the tip of rolling up core 1 be same settlement angle, utmost point ear 3 is to rolling up the same angle of buckling of needle 110 orientation promptly, can make mutually noninterfere between the utmost point ear 3 on different layers, thereby can avoid 3 mutual collisions of utmost point ear on different layers to lead to utmost point ear 3 to take place the mistake in disorder, turn over defects such as book, thereby guarantee that utmost point ear 3 divides the layer in order.

Referring to fig. 9 and 13, in some embodiments, the guide portion 143 of the movable member 141 has a guide edge 144, the guide edge 144 is parallel to the pole piece material strip 2 to be wound, one end of the guide edge 144 is located at the joint 150, the guide edge 144 is used for supporting the tab 3 on the side of the tab 3 of the pole piece material strip 2 facing the winding needle 110, and the guide edge 144 parallel to the pole piece material strip 2 can simultaneously support a plurality of tabs 3 on the pole piece material strip 2, so that the tab 3 on the pole piece material strip 2 is separated from the tab 3 already wound on the winding needle 110, and the two portions of the tabs 3 are prevented from colliding with each other and being damaged during the winding process.

Referring to fig. 9 and 13, in some embodiments, the side of the guide 143 facing the end of the winding core 1 has a shielding surface 145, and the shielding surface 145 is located between the tab 3 of the winding core 1 and the tab 3 of the pole piece web 2 to be wound, and can shield the tab 3 on the winding core 1 from interference. This face 145 of sheltering from can be inclined plane or cambered surface to keep away from the tip of rolling up core 1 gradually towards outer utmost point ear 3 direction, can effectively dodge utmost point ear 3 on rolling up core 1, avoid the collision.

Referring to fig. 14, in the winding process of the winding needle 110, a joint 150 is provided between the outer layer of the winding core 1 wound on the winding needle 110 and the pole piece tape 2 to be wound, that is, the position where the pole piece tape 2 is wound into the winding core 1, the thickness of the winding core 1 gradually increases as the winding continues, the position of the joint 150 also changes continuously, and the joint 150 where the pole piece tape 2 is wound into the winding core 1 changes along a set curved path from the inner layer of the winding core 1 to the outer side under the premise that the conveying path of the pole piece tape 2 is not changed, for convenience of explanation, fig. 14 shows the joint 150 where the pole piece tape 2 is wound into the winding core 1 at different thicknesses of the winding core 1, and the change curve 151 of the position of the joint 150 is obtained by connecting the joints 150 by curves.

Referring to fig. 8, 9 and 14, in the tab smoothing mechanism according to the embodiment of the present application, the driving assembly 146 may include a driving element and a connecting plate 147, the connecting plate 147 is connected to the mounting portion, the connecting plate 147 is provided with a guide slot 148, the connecting portion 142 of the movable element 141 is connected with a guide post 149, the guide post 149 is inserted into the guide slot 148 and can move along the guide slot 148, the driving element is configured to drive the connecting portion 142 to move, the guide slot 148 is configured to limit a moving path of the guide post 149, and the guide post 149 moves along the guide slot 148 with the driving of the driving element, and can drive the movable element 141 to move relative to the winding needle 110 according to the set path, so that the guide portion 143 is held at a joint 150 between the pole tab 3 of the winding core 1 and the pole piece material tape 2 to be wound and is shielded between the pole tab 3 on the pole piece material tape 2. Wherein the guide slot 148 has a first end and a second end, the first end is located at a smaller distance from the winding needle 110 than the second end is located at the winding needle 110, whereby the movement of the guide post 149 along the guide slot 148 changes the distance between the guide portion 143 and the winding needle 110, i.e. changes the distance between the guide portion 143 and the core 1 wound on the winding needle 110, so as to correspondingly move the guide portion 143 to the above-mentioned junction 150 as the core 1 is thickened.

Referring to fig. 8 and 9, in some embodiments, the guide slot 148 of the connecting plate 147 may be arc-shaped, and the concave arc side of the guide slot 148 faces away from the winding needle 110, so that when the guide post 149 moves along the guide slot 148, the guide portion 143 can be moved along the arc-shaped path, and thus can be moved along the position of the joint 150. The radian of the guide groove 148 can be set to be consistent with the radian of the curve formed by the connection of the joint 150, and at this time, only the movable element 141 needs to be driven to move along the guide groove 148, so that it can be ensured that one end of the guide portion 143 moves along with the position change of the joint point, and because the speed of winding the pole piece material strip 2 is constant, the change rate of the inclination angle of the pole piece material strip 2 is also constant, and the guide edge 144 of the guide portion 143 can be parallel to the pole piece material strip 2 to be wound and can support the tab 3 of the pole piece material strip 2.

The movable member 141 can be moved along the guide groove 148 relative to the connecting plate 147 by a conventional linear motion mechanism, for example, a conventional linear motion mechanism including a timing belt mechanism, a rack and pinion mechanism, a screw module mechanism, or an air cylinder mechanism. The driving assembly 146 of this embodiment includes a driving element, a gear 1461 and a rack 1462, the rack 1462 is fixedly connected to the moving member 141, the gear 1461 is connected to the driving element, and the gear 1461 is engaged with the rack 1462, thereby forming a rack-and-pinion mechanism, the driving element is configured to drive the gear 1461 to rotate, so that the rack 1462 drives the moving member 141 to move, and the mechanism is simple, reliable and easy to implement.

Fig. 15 is a schematic view of the handling device in the embodiment of fig. 1, and referring to fig. 1 and 15, in some embodiments, after the winding of the winding core 1 is completed, the winding core can be loaded and unloaded from the winding needle 110 to the lug flattening device 400 by the handling device 600. The handling device 600 comprises a clamping jaw 610, a clamping jaw opening and closing mechanism 620 and a moving mechanism 630, wherein the clamping jaw opening and closing mechanism 620 drives the clamping jaw 610 to open and close to take and place the winding core 1, and the moving mechanism 630 is used for moving the clamping jaw 610 so as to handle the winding core 1 between the winding needle 110 and the bearing member 411 of the tab flattening device 400.

Fig. 16 is a schematic diagram of the tab flattening apparatus in the embodiment of fig. 1, and referring to fig. 1, fig. 15 and fig. 16, a bearing element 411 of the tab flattening apparatus 400 can be used for bearing a plurality of winding cores 1, a pressing head 421 is correspondingly located at a set position of the bearing element 411, the bearing mechanism 410 further includes a conveying assembly 412, and the conveying assembly 412 is used for driving the bearing element 411 to move relative to the pressing head 421 so as to convey the winding cores 1 to a position corresponding to the pressing head 421, so as to be able to correspondingly press the tabs 3 of the winding cores 1. The carrier 411 may be a conveyor belt, the conveying assembly 412 is a conventional roller assembly for conveying the conveyor belt, the winding cores 1 are placed on the conveyor belt, and the winding cores 1 can be conveyed to the position of the pressing head 421 one by one through the conveying of the conveying assembly 412.

Generally, after the winding device 100 finishes winding the positive electrode sheet material strip 2 and the negative electrode sheet material strip 2, the tab 3 of the positive electrode sheet material strip 2 and the tab 3 of the negative electrode sheet material strip 2 are respectively located at two ends of the winding core 1, and are used as the positive electrode tab 3 and the negative electrode tab 3. In some embodiments, the pressing mechanism 420 includes a pressing assembly and a pressing driving assembly 422, the pressing assembly includes a pressing support 423 and two pressing heads 421 disposed opposite to each other, the pressing support 423 is fixed opposite to the conveying assembly 412, and the pressing driving assembly 422 is connected to the pressing support 423. The two pressing heads 421 are respectively connected to the pressing driving assembly 422, and the pressing driving assembly 422 is used for driving the two pressing heads 421 to move oppositely; or, a sliding rail is disposed on the pressing support 423, the two pressing heads 421 are slidably connected to the sliding rail, respectively, and the pressing driving assembly 422 is configured to drive the two pressing heads 421 to move along the sliding rail in an opposite direction. The two pressing heads 421 moving in opposite directions can respectively press the positive electrode tab 3 and the negative electrode tab 3 from the two ends of the winding core 1, thereby realizing the flattening operation of the tab 3 of the winding core 1. After the current roll core 1 is pressed and is accomplished, press drive assembly 422 drive two press heads 421 and move apart from each other to dodge the roll core 1 that has accomplished utmost point ear 3 and flatten the operation, and carry the carrier 411 motion by conveying assembly 412 drive to carry next roll core 1 to press head 421 department and carry out utmost point ear 3 and flatten, realize continuous operation of flattening from this. The pressing driving assembly 422 may be a conventional bidirectional cylinder, and can simultaneously drive the two pressing heads 421 to realize the above-mentioned opposite or separated movement. Alternatively, the pressing driving assembly 422 may also be a conventional unidirectional cylinder, and the two pressing heads 421 may respectively realize the above-mentioned opposite or separate movements by the extension and retraction of a unidirectional cylinder.

According to the winding method, the tab 3 is bent and flattened in the winding process, and the two ends of the winding core 1 which is wound form the tab 3 which is orderly in multiple layers and bent towards the central axis direction of the winding core 1, so that the tab 3 is conveniently flattened. The utmost point ear 3 after flattening can paste towards the middle part of rolling up core 1 and lean on in the tip of rolling up core 1, prevents that utmost point ear 3 from turning up to avoid the damage of utmost point ear 3 in follow-up process (for example roll core 1 income shell process), be of value to the quality that improves electric core.

The winding core 1 is generally formed by winding a positive electrode sheet and a negative electrode sheet with a separator interposed between the respective electrode sheets. The electrode sheet material strip 2 of the above embodiment may include a positive electrode sheet material strip 2 and a negative electrode sheet material strip 2. Referring to fig. 1, in some embodiments of the present invention, the conveying device 200 includes a positive plate conveying mechanism 210, a negative plate conveying mechanism 220, a first diaphragm conveying mechanism 230, and a second diaphragm conveying mechanism 240 connected to the frame, the positive plate conveying mechanism 210 is configured to convey a positive plate material strip 2 to the winding needle 110, the negative plate conveying mechanism 220 is configured to convey a negative plate material strip 2 to the winding needle 110, positive tabs 3 on the positive plate material strip 2 and negative tabs 3 on the negative plate material strip 2 face opposite directions along an axial direction of the winding needle 110, respectively, and the positive tabs 3 and the negative tabs 3 on the winding needle 110 face two ends of the winding core 1, respectively. The first membrane conveying mechanism 230 is used for conveying the membrane material strip 4 to the winding needle 110 between the positive electrode material strip 2 and the negative electrode material strip 2, and the second membrane conveying mechanism 240 is used for conveying the membrane material strip 4 to the winding needle 110 between the positive electrode material strip 2 and the winding needle 110. Positive plate conveying mechanism 210, negative pole piece conveying mechanism 220, first diaphragm conveying mechanism 230 and second diaphragm conveying mechanism 240 can adopt conventional unwinding mechanism, and positive plate material area 2, negative pole piece material area 2 and diaphragm material area 4 set up in unwinding mechanism with the book of lapping, and the one end of rolling up the material is taken out and can be unreeled, through the conveying roller orientation transport, perhaps drags through the coiling of book needle 110 and sustainably unreels. The transport apparatus 200 may be provided with rollers in the transport path between each transport mechanism and the winding needle 110 for the orderly distribution and transport of each strip of material.

Based on the above embodiment, the winding needle 110 is used for winding the positive plate material belt 2, the negative plate material belt 2 and the diaphragm material belt 4 to form the winding core 1, the positive plate material belt 2 and the negative plate material belt 2 respectively have an inner side and an outer side, and the inner sides of the positive plate material belt 2 and the negative plate material belt 2 face the winding needle 110 when the winding is performed. And a tab bending device 300 is arranged on the conveying path of the positive plate material belt 2 and used for bending the positive tabs 3 towards the inner side of the positive plate material belt 2. The conveying path of the negative electrode sheet material belt 2 is also provided with a tab bending device 300 for bending the negative electrode tabs 3 towards the inner side of the negative electrode sheet material belt 2. The positions of the positive electrode sheet material strip 2 and the negative electrode sheet material strip 2 of the above embodiment can be exchanged. The winding device 100 is provided with tab flattening mechanisms corresponding to the two ends of the winding core 1 respectively, and is used for flattening the positive tabs 3 and the negative tabs 3 at the two ends of the winding core 1 towards the end part of the winding core 1. Therefore, the positive electrode tab 3 and the negative electrode tab 3 can be bent and smoothed on line, and damage is avoided.

By the above, among the electric core processing system of this application embodiment, carry pole piece material area 2 through conveyor 200, and on the transport route in pole

piece material area

2, 3 towards inboard bending of utmost point ear 3 with pole piece material area 2 through utmost point ear bending device 300, thereby, pole piece material area 2 when coiling through winding needle 110 in take-up device 100 department, utmost point ear smooths the mechanism and can smooths the utmost point ear 3 of rolling up core 1 of rolling up on winding needle 110, avoid utmost point ear 3 damage, and in some embodiments, can also separate the utmost point ear 3 of pole piece material area 2 of waiting to roll up with the utmost point ear 3 of rolling up core 1, avoid interfering, thereby help rolling up the orderly layering of utmost point ear 3 on core 1. Therefore, the on-line bending and flattening of the lug 3 are realized when the pole piece is wound, and the damage to the lug 3 in the winding process can be effectively avoided, so that the processing efficiency and quality of the battery cell are improved. And in some embodiments, the pole lug 3 flattening device can also separate the pole lug 3 of the pole piece material belt 2 to be rolled from the pole lug 3 of the roll core 1, so as to avoid interference, thereby facilitating the orderly layering of the pole lug 3 on the roll core 1. After winding is finished, the flattening process of the subsequent coil core 1 after blanking and before flattening the lug 3 can be omitted.

Fig. 17 is a schematic structural diagram of a cell processing system according to an embodiment of the present invention, and referring to fig. 17, a third aspect of the present invention provides a cell processing system including a laser cutting device 500 and a tab 3 shaping device according to the second aspect of the present invention, where the laser cutting device 500 is disposed on a conveying path of a pole piece material strap 2 between a conveying device 200 and a tab bending device 300, and is configured to process a tab 3 on the pole piece material strap 2. The electric core processing system cuts the lug 3 on line through the laser cutting device 500, and the lug 3 is bent before the material belt is wound through the lug 3 shaping equipment, the lug 3 is flattened during winding, and the lug 3 is flattened after winding, so that the lug 3 can be cut, bent on line, shaped, wound and flattened under the condition of no shutdown, the transfer process is reduced, and the production efficiency is improved.

Fig. 18 to 25 are schematic diagrams of a laser cutting device in some embodiments, referring to fig. 18 and 19, in some embodiments, the laser cutting device 500 includes a laser head 510, a feeding device 520, a cutting pallet 570 and a scrap separating device 560, the feeding device 520 includes a feeding roller 522 and a discharging roller 523 arranged at intervals, the cutting pallet 570 is arranged between the feeding roller 522 and the discharging roller 523, a first negative pressure opening 571, a second negative pressure opening 572 and a third negative pressure opening 573 are sequentially arranged on the cutting pallet 570 along a conveying direction of the pole piece tape 2, the laser head 510 can cut the tape passing through the second negative pressure opening 572, and the scrap separating device 560 can separate the cut and separated scrap 22 (refer to fig. 25) from the tape, so that a tab 3 can be cut and formed on the pole piece tape 2.

Referring to fig. 18 and 19, in some embodiments, the laser cutting apparatus 500 includes a laser head 510, a feeding device 520, a dust blade assembly 530, a front dust hood 540, a side dust hood 550, a scrap separator 560, and a cutting blade 570, the feeding device 520 includes a frame 521, a feeding roller 522, and a discharging roller 523, the feeding roller 522 and the discharging roller 523 are rotatably disposed on the frame 521, and the tape is introduced from the feeding roller 522, is led out from the discharging roller 523, and is tensioned between the feeding roller 522 and the discharging roller 523. Cutting layer board 570 pastes the right side of pasting in the material area, and laser head 510 sets up with cutting layer board 570 relatively, and laser head 510 is located the left side of material area, and laser head 510 can cut the material area that is located cutting layer board 570 department. The front dust removing cover 540 is located on the same side as the laser head 510, the cutting blade 570 is covered by the front dust removing cover 540, and the front dust removing cover 540 is communicated with a first negative pressure gas source (not shown), so that the cutting blade 570 is cleaned in the front. The dust removing knife assembly 530 and the side dust removing cover 550 are respectively arranged on the left side and the right side of the cutting supporting plate 570, the side dust removing cover 550 is communicated with a second negative pressure air source (not shown), air flow formed by the dust removing knife assembly 530 blows to the side dust removing cover 550 after passing through the cutting supporting plate 570, and the dust removing knife assembly 530 and the side dust removing cover 550 are matched to perform side dust removal on the cutting supporting plate 570. The scrap separating device 560 is located on the left side of the tape, and the scrap separating device 560 is used for separating the scrap 22 (refer to fig. 25) of the cut tape.

Referring to fig. 19, 22 and 23, a first negative pressure port 571, a second negative pressure port 572 and a third negative pressure port 573 are provided on a side of the cutting support plate 570 facing the tape, and the first negative pressure port 571, the second negative pressure port 572 and the third negative pressure port 573 are sequentially arranged along the advancing direction of the tape, wherein the cutting position of the laser head 510 is located in the area of the second negative pressure port 572, and in this embodiment, the first negative pressure port 571, the second negative pressure port 572 and the third negative pressure port 573 are sequentially arranged from top to bottom. The negative pressure of the first, second and third

negative pressure ports

571, 572 and 573 can be generated by a blower or a vacuum generator. Therefore, when the material belt just enters the area where the cutting supporting plate 570 is located, the first negative pressure port 571 adsorbs the material belt, and the problem that the material belt floats before being cut is prevented; when the material belt is cut, the second negative pressure port 572 performs adsorption and fixation, and meanwhile, the second negative pressure port 572 also has a function of adsorbing dust; when the material belt is about to be separated from the area where the cutting support plate 570 is located, the material belt is adsorbed and fixed by the third negative pressure port 573, so that the material belt is prevented from shaking due to the influence of the material receiving action.

Referring to fig. 20, 21 and 25, the scrap separator 560 includes a driving device 561, a driving roller 562, a belt 563, and a driven roller 564, the belt 563 is sleeved on the driving roller 562 and the driven roller 564, the driving device 561 can drive the driving roller 562 to rotate, so as to drive the belt 563 to rotate circularly, the belt 563 is provided with through holes 5631 communicating two surfaces thereof, and the through holes 5631 are distributed on the belt 563 in an array. In this embodiment, the driving device 561 is a motor, and the motor is connected to the driving roller 562 through a coupling. The driven roller 564 is disposed between the third negative pressure port 573 and the discharging roller 523, and the belt 563 on one side is disposed between the fourth negative pressure port (not shown) and the tape, so that when the tape advances downward from the third negative pressure port 573, the tape passes through the area where the fourth negative pressure port is located, the negative pressure caused by the fourth negative pressure port penetrates through the through hole 5631, the waste 22 separated from the tape after cutting is adsorbed and fixed on the belt 563, the waste 22 moves along with the belt 563, and when the waste 22 on the belt 563 is separated from the area where the fourth negative pressure port is located, the waste 22 falls off from the belt 563, thereby completely separating the waste 22. Referring to fig. 24 and 25, the edge area 21 of the pole piece material strip 2 is used for processing and forming the tab 3, and the rest is the waste material 22 to be removed.

As can be seen from the above, in the battery cell processing system according to the embodiment of the present invention, the positive electrode sheet material strip 2, the negative electrode sheet material strip 2, and the separator are respectively conveyed to the winding device 100 by the conveying device 200 to be wound, and in the conveying process of the positive electrode sheet material strip 2, the tabs 3 are cut and bent on line, and the tabs 3 are smoothed during winding, and the tabs 3 at the end of the winding core 1 can be flattened after winding. The material loading, unloading and transferring operations among all working procedures in the conventional process are omitted, so that the production process is optimized. By the aforesaid, the orderly bending and smoothing of utmost point ear 3 can make utmost point ear 3 keep towards the middle part of rolling up core 1 and buckle, avoid utmost point ear 3 to damage or in disorder to can improve the rotational speed of rolling up needle 110 correspondingly, thereby show and improve winding efficiency, be of value to and improve electric core production efficiency.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims

1. A tab reshaping method is characterized by comprising the following steps:

2. The method for shaping the pole lug according to claim 1, wherein in the winding process of the winding needle, the joint of the pole piece material belt to be wound and the winding core wound on the winding needle is shielded, so that the pole lug of the pole piece material belt and the pole lug of the winding core are prevented from interfering with each other in the winding process.

3. A tab shaping device, comprising:

4. The utmost point ear plastic equipment of claim 3, characterized in that, utmost point ear smooths the mechanism and includes support and first guiding mechanism, the leg joint in the frame, the support is provided with the installation department, first guiding mechanism includes the mounting, the mounting is located the utmost point ear of rolling up the core stretches out the end and connect in the installation department follows the circumference of book needle, the fixed plate includes feed end and discharge end, the utmost point ear of rolling up the core along with the rotation of rolling up the needle can be followed the feed end gets into the mounting with roll up between the tip of core, and follow the discharge end shifts out, the mounting is used for with the utmost point ear orientation of rolling up the core the tip of rolling up the core smooths.

5. The tab shaping device according to claim 4, wherein a side of the fixing member facing an end of the winding core has a guide surface, a distance between the guide surface and the end of the winding core is gradually reduced from the feed end to the discharge end, and the guide surface is used for smoothing a tab of the winding core toward the end of the winding core.

6. The utmost point ear plastic equipment of claim 4, characterized in that, utmost point ear smooths mechanism still includes second guiding mechanism, second guiding mechanism includes moving part and drive assembly, the moving part correspond to the tip that has utmost point ear of rolling up the core set up in one side of book needle, the moving part includes connecting portion and guide part, connecting portion connect in the installation department, the guide part is located one side of feed end can roll up the core and wait to go into the junction in the pole piece material area of rolling up and shelter from in the utmost point ear of rolling up the core with between the utmost point ear in the pole piece material area, drive assembly is used for the drive the moving part is relative the mounting moves extremely the guide part is located the junction.

7. The tab shaping device according to claim 6, wherein the driving assembly includes a driving element and a connecting plate, the connecting plate is connected to the mounting portion, the connecting plate is provided with a guide slot, a guide post is connected to the connecting portion, the guide post is inserted into the guide slot and can move along the guide slot, the driving element is used for driving the connecting portion to move, and the guide slot is used for limiting a moving path of the guide post.

8. The pole lug shaping equipment according to claim 3, wherein the pole lug bending device comprises a roller mechanism and a roller pressing mechanism, the roller mechanism is used for supporting the outer side of the pole piece material belt and conveying the pole piece material belt, a concave die is arranged on the roller mechanism corresponding to the position of a pole lug of the pole piece material belt, the opening of the concave die faces the inner side of the pole piece material belt, and the roller pressing mechanism corresponds to the position of the concave die and is used for rolling and bending the pole lug on the concave die.

9. The tab shaping device according to claim 8, wherein the tab bending device further comprises a mounting base and a pressing roller pressing mechanism, the pressing roller pressing mechanism and the roller passing mechanism are both disposed on the mounting base, the pressing roller pressing mechanism is used for pressing the pole piece material belt on the roller passing mechanism, the roller pressing mechanism is disposed on the pressing roller pressing mechanism, and the roller passing mechanism, the roller pressing mechanism and the pole piece material belt can move at a constant linear velocity.

10. The tab shaping device according to claim 3, wherein the carrier is configured to carry a plurality of winding cores, the pressing head is correspondingly located at a set position of the carrier, and the carrying mechanism further includes a conveying assembly configured to drive the carrier to move relative to the pressing head so as to convey the winding cores to a position corresponding to the pressing head.

11. The tab shaping device as claimed in any one of claims 3 to 10, wherein the conveying means includes:

12. The tab shaping device according to claim 11, wherein the winding needle is configured to wind a positive electrode sheet material strip, a negative electrode sheet material strip, and a separator material strip to form a winding core, the positive electrode sheet material strip and the negative electrode sheet material strip respectively have an inner side and an outer side, and the inner sides of the positive electrode sheet material strip and the negative electrode sheet material strip face the winding needle when the winding core is wound;

13. A battery cell processing system, characterized by comprising a laser cutting device and the tab shaping device of any one of claims 3 to 12, wherein the laser cutting device is disposed on a conveying path of the pole piece material strap between the conveying device and the tab bending device, and is used for processing a tab on the pole piece material strap.

14. The battery cell processing system of claim 13, wherein the laser cutting device includes a laser head, a feeding device, a cutting support plate, and a waste material separating device, the feeding device includes a feeding roller and a discharging roller that are arranged at intervals, the cutting support plate is arranged between the feeding roller and the discharging roller, a first negative pressure port, a second negative pressure port, and a third negative pressure port are sequentially arranged on the cutting support plate along a conveying direction of the pole piece material belt, the laser head can cut the material belt passing through the second negative pressure port, and the waste material separating device can separate the waste material after being cut and separated from the material belt.