CN114388874A

CN114388874A - Battery cell processing system

Info

Publication number: CN114388874A
Application number: CN202111584349.0A
Authority: CN
Inventors: 梁辰; 赵盛宇; 张松岭; 谢珩; 江桦锐; 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: 2022-04-22

Abstract

The utility model relates to the technical field of battery manufacturing, and provides a battery cell processing system which comprises a rack, and a winding device, a conveying device and a lug bending device which are connected to the rack. 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 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 winding quality of a winding core is improved, and the production efficiency of an electric core is improved.

Description

Battery cell processing system

Technical Field

The utility model relates to the field of battery manufacturing, in particular to 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 middle of the manufacturing process of the batteries, the winding efficiency of the battery core and the quality after winding are the key factors influencing the production efficiency and the product quality of the batteries, and in the related technology, the poor phenomena of tab folding, disorder and the like are easily caused when the battery core is wound, so that the tab is damaged, the quality of finished batteries is poor, and even the finished batteries are scrapped, and the production efficiency is influenced.

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 battery cell processing system which can effectively avoid the damage of a tab and is beneficial to improving the production efficiency and quality of a battery cell.

The battery cell processing system according to the embodiment of the utility model comprises:

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,

the winding device, the conveying device and the tab bending device are connected to the rack.

The battery cell processing system provided by the embodiment of the utility model at least has 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 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 winding quality of a winding core is improved, and the production efficiency of an electric core is improved.

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 roller pressing mechanism comprises:

the upper end of the first driving piece is connected with the mounting base, and the first driving piece is provided with a first output end;

the support is arranged at the first output end, the roller passing mechanism is positioned below the support, and the first driving piece drives the support to move along the vertical direction; and the number of the first and second groups,

the first roller is rotatably arranged at the lower end of the support.

According to some embodiments of the utility model, the roller hold down mechanism comprises:

the second driving piece is arranged on the support and is provided with a second output end;

the first connecting piece is provided with a first connecting end and a second connecting end, the first connecting end is rotatably connected with the support, the first roller is arranged on the first connecting end, and the second connecting end is rotatably connected with the second output end; and the number of the first and second groups,

the second idler wheel is arranged on the second connecting end, a male die is arranged on the second idler wheel, the second driving piece drives the second idler wheel to compress the tabs along the vertical direction, and the second idler wheel can roll and bend the tabs between the male die and the female die.

According to further embodiments of the present invention, the roller pressing mechanism comprises:

the motor is arranged on the support and is provided with a third output end;

one end of the first connecting piece is fixedly connected with the third output end, and the other end of the first connecting piece is rotatably connected with the second output end; and the number of the first and second groups,

the second gyro wheel, the second gyro wheel sets up on the first connecting piece, be provided with the terrace die on the second gyro wheel, the motor passes through first connecting piece drives the second gyro wheel rotates, the drive of second driving piece the second gyro wheel compresses tightly utmost point ear along vertical direction, the second gyro wheel can be with being located the terrace die with utmost point ear roll extrusion between the die is buckled.

the first connecting piece is rotatably arranged on the support;

one end of the first connecting piece is rotatably connected with the second output end, the other end of the first connecting piece is connected with the transmission piece, and the first connecting piece is connected with the roller passing mechanism through the transmission piece; and the number of the first and second groups,

the second gyro wheel, the second gyro wheel sets up on the first connecting piece, be provided with the terrace die on the second gyro wheel, the second gyro wheel passes through the driving medium with cross roller mechanism and rotate in step, the drive of second driving piece the second gyro wheel compresses tightly utmost point ear along vertical direction, the second gyro wheel can be located the terrace die with utmost point ear roll extrusion between the die is buckled.

According to some embodiments of the utility model, one or both sides of the tab bending device along the transport path of the strip of pole pieces are provided with tensioning rollers for tensioning the strip of pole pieces passing through the tab bending device.

According to some embodiments of the utility model, the conveyor comprises, connected to the frame:

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.

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 battery cell processing system 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 the tab bending device in the embodiment of the utility model;

fig. 6 is a partial schematic view of another structure of a female die and a male die in the tab bending device in the embodiment of the utility model;

fig. 7 is a partial schematic view of another structure of a female die and a male die in the tab bending device in the embodiment of the utility model;

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 of the junction of the pole piece web and the core changing position as the thickness of the core increases.

Reference numerals:

the device comprises a roll core 1, a pole piece material belt 2, a tab 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 element 331, a first output end 3311, a support 332, a first roller 333, a roller pressing mechanism 340, a second driving element 341, a second output end 3411, a first connecting element 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 element 345, a first gear 3451 and a second gear 3452.

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.

Fig. 1 is a schematic structural diagram of a battery cell processing system according to an embodiment of the present invention, and referring to fig. 1, an embodiment of the present invention provides a battery cell processing system, which includes a rack, and a winding device 100, a conveying device 200, and a tab bending device 300 that are connected to the rack. Winding device 100 includes winding mechanism and utmost point ear smooths mechanism, and winding mechanism includes winding needle 110 and is used for driving winding needle 110 drive assembly 146 that winding needle 110 pivoted, and winding needle 110 is used for coiling pole piece material area 2 and diaphragm material area 4 and forms a 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 mechanism and is used for smoothing the terminal portion of rolling up core 1 with the utmost point ear 3 orientation of rolling up core 1. The conveying device 200 is used for conveying the pole piece material belts 2 and the diaphragm material belts 4 to the winding needle 110, the tab bending device 300 is arranged on a conveying path of the pole piece material belts 2, and the tab bending device 300 is used for bending tabs 3 of the pole piece material belts 2 towards the inner side direction before the pole piece material belts 2 are wound. In the winding process, the tab bending device 300 can roll and bend the tab 3 of the pole piece material belt 2 in the tape winding process without stopping before winding, and flatten the bent tab 3 wound on the winding needle 110 through the tab flattening mechanism when the pole piece material belt 2 is wound, the impact of the tab 3 on the tab flattening mechanism when the winding core 1 is wound can be effectively eliminated by the bent tab 3, and the tab 3 is bent towards the inner side direction of the pole piece material belt 2, so that the tab flattening mechanism is facilitated to flatten the tab 3 towards the same side, and the adverse phenomena of tab 3 folding, disorder and the like in the winding process can be effectively avoided after the tab 3 is flattened, so that the purpose of not damaging the tab 3 is achieved, thereby improving the winding quality of the winding core 1 and being beneficial to improving the production efficiency of the electric core.

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 the pole lug flattening mechanism can flatten the pole lug 3 of the winding core 1 when the pole piece is wound, so that when the winding core 1 is wound, the pole lug 3 at the end part of the winding core 1 is flattened, and a subsequent flattening process can be omitted.

In addition, in order to improve the production efficiency of the battery cell, the winding speed of the winding machine, that is, the rotation speed of the winding needle 110, is usually increased, but with the increase of the winding speed, the tab 3 wound on the winding needle 110 is easily turned over, disordered or interfered by centrifugal force, and the like, so that the quality of the battery cell is affected. The lug flattening mechanism of the embodiment of the application can flatten the lug 3 rolled on the winding needle 110, and the lug flattening function can effectively avoid the problem that the lug 3 is generated due to centrifugal force in the winding process, so that the rotating speed of the winding needle 110 can be further improved to a certain extent, and the winding efficiency and the winding quality are improved.

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. 5 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 slot 148 relative to the connecting plate 147 by a conventional linear motion mechanism, for example, a conventional linear indian mechanism including a timing belt mechanism, a rack and pinion mechanism, a lead screw module mechanism, or a 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.

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 subsequent flattening process after the blanking of the winding core 1 can be omitted.

The electric core processing system can also be provided with a controller and a sensor (not shown in the figure), the controller is in communication connection with the winding needle 110 driving component 146 and the sensor, the sensor is used for detecting the thickness of the winding core 1 on the winding needle 110, a sensing signal is generated when the winding core 1 reaches the set thickness, the controller receives the sensing signal to indicate the winding needle 110 to stop winding, and at the moment, the pole piece material belt 2 can be cut so as to facilitate the discharging of the winding core 1 to the next processing procedure.

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 cell machining system, comprising:

2. The electric core processing system of claim 1, characterized in that, utmost point ear smooths mechanism 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 between the mounting with the tip of rolling up the 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.

3. The cell processing system according to claim 2, 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 feeding end to the discharging end, and the guide surface is used for smoothing a tab of the winding core towards the end of the winding core.

4. The electric core processing system of claim 2, 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.

5. The battery cell processing system according to claim 4, 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 groove, a guide post is connected to the connecting portion, the guide post is inserted into the guide groove and can move along the guide groove, the driving element is configured to drive the connecting portion to move, and the guide groove is configured to limit a moving path of the guide post.

6. The battery cell processing system according to claim 1, wherein the tab bending device includes a roller mechanism and a roller pressing mechanism, the roller mechanism is configured to support the outer side of the pole piece material strip and convey the pole piece material strip, a concave die is disposed on the roller mechanism at a position corresponding to a tab of the pole piece material strip, an opening of the concave die faces the inner side of the pole piece material strip, and the roller pressing mechanism is corresponding to the position of the concave die and is configured to roll and bend a tab located on the concave die.

7. The battery cell processing system according to claim 6, 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 strap onto 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 strap can move at a constant linear velocity.

8. The cell machining system of claim 7, wherein the compression roller pressing mechanism comprises:

the first roller is rotatably arranged at the lower end of the support.

9. The cell machining system of claim 8, wherein the roller pressing mechanism comprises:

10. The cell machining system of claim 8, wherein the roller pressing mechanism comprises:

the motor is arranged on the support and is provided with a third output end;

11. The cell machining system of claim 8, wherein the roller pressing mechanism comprises:

the first connecting piece is rotatably arranged on the support;

12. The cell processing system according to claim 1, wherein one or both sides of the tab bending device along the transport path of the pole piece material strip are provided with tensioning rollers for tensioning the pole piece material strip passing through the tab bending device.

13. The cell machining system according to any one of claims 1 to 12, wherein the conveyor comprises, connected to the machine frame:

14. The cell processing system according to claim 13, 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 during winding;