CN220627851U

CN220627851U - Rolling stretching device

Info

Publication number: CN220627851U
Application number: CN202322328686.4U
Authority: CN
Inventors: 杨立华; 何林民; 吴建华
Original assignee: Lanjun New Energy Technology Co ltd
Current assignee: Lanjun New Energy Technology Co ltd
Priority date: 2023-08-29
Filing date: 2023-08-29
Publication date: 2024-03-19
Anticipated expiration: 2033-08-29

Abstract

The embodiment of the application provides a roll-in stretching device, relates to battery production technical field. The rolling stretching device comprises a mandrel, a supporting roller, a stretching roller assembly and a pushing roller assembly, wherein the supporting roller and the stretching roller assembly are sleeved on the mandrel, the supporting roller and the stretching roller assembly can contact the pole piece, the supporting roller corresponds to the coating area of the pole piece, the stretching roller assembly corresponds to the white area of the pole piece, the stretching roller assembly can move relative to the mandrel, the pushing roller assembly is arranged on one side of the mandrel and used for pushing the stretching roller assembly towards the pole piece so that the stretching roller assembly stretches the white area of the pole piece, the stretching roller assembly can conveniently stretch the white area of the pole piece, and the product quality is improved.

Description

Rolling stretching device

Technical Field

The application relates to the technical field of battery production, in particular to a rolling stretching device.

Background

In the process of producing lithium battery cells, there is an indispensable rolling process. However, when the pole piece is rolled, the tension of the coating area and the blank area of the pole piece is different, so that the blank area of the pole piece after rolling has larger tensile stress, and the edge of the foil material in the blank area is wrinkled.

The technology commonly adopted at present is to arrange a set of tension mechanism to pre-extend the polar plate before rolling or to arrange a set of tension mechanism to post-extend after rolling, in particular to wind 2-3 layers of Teflon cloth on the tension roller of the tension mechanism at the position corresponding to the blank area, so that the foil in the blank area is forced to be pulled away, and the extension is generated. However, as the incoming materials are changed frequently, the teflon cloth is required to be pasted again frequently on site, the pasting process is operated manually, and the pasting position is not easy to control; when the teflon cloth is stuck each time, the teflon cloth with different thickness and layer number needs to be tried for many times, which is very inconvenient to adjust; and because the space of the operation position is narrow, the pole piece is required to be cut off each time when the teflon cloth is stuck, and after the tape is re-connected, the pole piece can be stably centered only by one section, so that the product quality is influenced.

Disclosure of Invention

The purpose of this application includes, for example, provides a roll-in stretching device, and it can be convenient for to the blank district of pole piece extend, promotes product quality.

Embodiments of the present application may be implemented as follows:

the embodiment of the application provides a roll-in stretching device, and it includes dabber, backing roll, stretching roller subassembly and push roll subassembly, the backing roll with the dabber is all located to stretching roller subassembly cover, just the backing roll with stretching roller subassembly homoenergetic contacts the pole piece, the backing roll corresponds with the coating district position of pole piece, stretching roller subassembly corresponds with the blank district position of pole piece, stretching roller subassembly can relative dabber activity, the push roll subassembly set up in one side of dabber is used for the orientation pole piece promotes stretching roller subassembly, so that stretching roller subassembly stretches the blank district of pole piece.

Optionally, the stretching roller assembly includes sleeve, endotheca, stretching ring and elastic component, the sleeve cover is located the dabber, the endotheca cover is located the sleeve, the stretching ring cover is located the endotheca, the elastic component set up in between the lateral wall of sleeve and the inside wall of endotheca for the endotheca with stretching ring has the trend that deviates from the pole piece motion.

Optionally, the stretching roller assembly further comprises a first bearing, and the first bearing is arranged between the inner sleeve and the stretching ring.

Optionally, a first flat key is arranged between the sleeve shaft and the mandrel.

Optionally, the stretching ring comprises a metal layer and a wear-resistant layer which are arranged from inside to outside, and the wear-resistant layer is made of teflon, diamond-like carbon or ceramic.

Optionally, the push roller assembly includes cylinder, cylinder joint and push roller bearing, the cylinder joint connect in the piston rod of cylinder with between the push roller bearing, the push roller bearing can the butt the stretch roller assembly.

Optionally, the axis of the push roller bearing is parallel to the axis of the mandrel.

Optionally, the rolling stretching device further comprises a first roller and a second roller, and the first roller, the mandrel and the second roller are sequentially provided for winding the pole piece.

Optionally, a second bearing is disposed between the backup roll and the mandrel.

Optionally, the rolling stretching device further comprises a flange seat, one end of the mandrel is connected to the flange seat, and a second flat key is arranged between the mandrel and the flange seat.

The beneficial effects of the roll stretching device of the embodiment of the application include, for example: in order to be convenient for extend the blank area of pole piece, a roll-in stretching device is designed, this roll-in stretching device includes the dabber, the backing roll, stretching roller subassembly and push roll subassembly, when backing roll and stretching roller subassembly are around locating to the pole piece, the coating district of pole piece corresponds with the backing roll position, the blank area of pole piece corresponds with stretching roller subassembly position, one side of dabber is provided with the push roll subassembly, promote stretching roller subassembly through this push roll subassembly towards the pole piece, stretching roller subassembly relative dabber motion and outwards support the pole piece, thereby the blank area of pole piece has been stretched, the effect of extension has been played, need not to cut off the pole piece and promoted product quality during stretching.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a prior art tension mechanism;

FIG. 2 is a schematic structural view of a roll stretching device according to an embodiment of the present application;

FIG. 3 is a front view of a roller stretching assembly in a first operating condition according to an embodiment of the present application;

FIG. 4 is a cross-sectional view taken along the direction B-B in FIG. 3;

FIG. 5 is a cross-sectional view of a pole piece in an embodiment of the present application;

FIG. 6 is a cross-sectional view of a stretch roll assembly in an embodiment of the present application;

FIG. 7 is a schematic view of a sleeve shaft according to an embodiment of the present application;

FIG. 8 is a schematic view of the inner sleeve according to an embodiment of the present application;

FIG. 9 is a cross-sectional view of a push roller assembly in an embodiment of the present application;

fig. 10 is a schematic diagram for showing a pole piece feeding path when the rolling stretching device is in the first working state in the embodiment of the present application;

FIG. 11 is a front view of a roll stretching device in a second operating condition in an embodiment of the present application;

FIG. 12 is a cross-sectional view taken in the H-H direction of FIG. 11;

fig. 13 is a schematic diagram for showing a pole piece feeding path when the rolling stretching device is in the second working state in the embodiment of the application.

Icon: 1-a mandrel; 11-a first flat key; 12-a second flat key; 2-a support roller; 21-a second bearing; 3-a stretch roll assembly; 31-sleeve shaft; 32-an inner sleeve; 33-stretching ring; 34-an elastic member; 35-a first bearing; 4-a push roller assembly; 41-cylinder; 42-cylinder joint; 421-connecting cylinder; 422-connecting shaft; 43-push roller bearings; 5-pole pieces; 51-coating zone; 52-leaving a white area; 6-first roller passing; 7-a second roller passing; 8-a flange seat; 9-a tension mechanism; 91-a front drive roller; 92-a front glue press roller; 93-tension roller; 94-swinging rod; 95-a rear drive roller; 96-post-glue press roller.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, if the terms "upper," "lower," "inner," "outer," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present application and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that, without conflict, features in embodiments of the present application may be combined with each other.

As shown in fig. 1, a conventional technique is to provide a set of tension mechanisms 9 for pre-stretching the pole piece before rolling or to provide a set of tension mechanisms 9 for post-stretching after rolling. The tension mechanism 9 mainly comprises a front clamping mechanism, a tension swing roller and a rear clamping mechanism; the front clamping mechanism comprises a front driving roller 91 and a front glue pressing roller 92; the tension swing roller comprises a tension roller 93 and a swing rod 94; the rear clamping mechanism comprises a rear driving roller 95 and a rear glue pressing roller 96; 2-3 layers of teflon cloth are wound around the tension roller 93 at positions corresponding to the blank 52, and the foil of the blank 52 is thus forced "pulled apart" creating an extension.

The incoming materials are changed frequently, so that the teflon cloth is required to be pasted again frequently on site, the pasting process is operated manually, and the pasting position is not easy to control; when the teflon cloth is stuck each time, the teflon cloth with different thickness and layer number needs to be tried for many times, which is very inconvenient to adjust; and because the space of the operation position is narrow, the pole piece is required to be cut off each time when the teflon cloth is stuck, and after the tape is re-connected, the pole piece can be stably centered only by one section, so that the product quality is influenced. The embodiment of the application provides a rolling stretching device, which is at least used for solving the technical problems.

Referring to fig. 2-5, the roll stretching device provided in the embodiment of the application includes a mandrel 1, a support roll 2, a stretching roll assembly 3 and a push roll assembly 4, wherein the support roll 2 and the stretching roll assembly 3 are both sleeved on the mandrel 1, the support roll 2 and the stretching roll assembly 3 can contact the pole piece 5, the support roll 2 corresponds to a coating area 51 of the pole piece 5, the stretching roll assembly 3 corresponds to a blank area 52 of the pole piece 5, the stretching roll assembly 3 can move relative to the mandrel 1, and the push roll assembly 4 is arranged on one side of the mandrel 1 and is used for pushing the stretching roll assembly 3 towards the pole piece 5 so that the stretching roll assembly 3 stretches the blank area 52 of the pole piece 5.

The pole piece 5 has a blank area 52 and a coating area 51 which are alternately arranged in sequence, and the mandrel 1 is alternately provided with the support roller 2 and the stretching roller assemblies 3 in sequence along the axis direction, wherein each stretching roller assembly 3 corresponds to one blank area 52, and each support roller 2 corresponds to one coating area 51.

When the pole piece 5 is wound on the support roller 2 and the stretching roller assembly 3, the coating area 51 of the pole piece 5 corresponds to the position of the support roller 2, the blank area 52 of the pole piece 5 corresponds to the position of the stretching roller assembly 3, the stretching roller assembly 3 is pushed towards the pole piece 5 by the push roller assembly 4 on one side of the mandrel 1, the stretching roller assembly 3 moves relative to the mandrel 1 and is propped against the blank area 52 of the pole piece 5 outwards, so that the blank area 52 is stretched, the stretching effect is achieved, and the product quality is improved without cutting off the pole piece 5 during stretching the blank area 52.

Referring to fig. 6, the stretching roller assembly 3 includes a sleeve shaft 31, an inner sleeve 32, a stretching ring 33 and an elastic member 34, wherein the sleeve shaft 31 is sleeved on the mandrel 1, the inner sleeve 32 is sleeved on the sleeve shaft 31, the stretching ring 33 is sleeved on the inner sleeve 32, and the elastic member 34 is disposed between the outer sidewall of the sleeve shaft 31 and the inner sidewall of the inner sleeve 32, so that the inner sleeve 32 and the stretching ring 33 have a tendency to move away from the pole piece 5.

When the push roller assembly 4 pushes the stretching roller assembly 3 towards the pole piece 5, the push roller assembly 4 abuts against and pushes the stretching ring 33 to compress the elastic piece 34, the inner sleeve 32 and the stretching ring 33 move towards the pole piece 5, and the stretching ring 33 abuts against the blank area 52 of the pole piece 5 outwards and stretches the blank area 52; when the push roller assembly 4 is reset, the elastic piece 34 is decompressed, the inner sleeve 32 and the stretching ring 33 are driven to reset under the elastic force of the elastic piece 34, and at the moment, the stretching ring 33 releases the stretching of the blank area 52.

Alternatively, the elastic member 34 is an elastic pad or spring.

Of course, it will be appreciated that the resilient member 34 could be other resilient members as long as the inner sleeve 32 and the tension ring 33 are able to have a tendency to move away from the pole piece 5.

The stretch roller assembly 3 further includes a first bearing 35, the first bearing 35 being disposed between the inner sleeve 32 and the stretch ring 33.

It should be noted that the inner ring of the first bearing 35 is coupled to the inner sleeve 32, and the outer ring of the first bearing 35 is coupled to the tension ring 33, so that the tension ring 33 can rotate with respect to the inner ring.

A first flat key 11 is arranged between the sleeve shaft 31 and the mandrel 1.

The sleeve shaft 31 and the mandrel 1 are provided with key grooves matched with the first flat key 11, and the sleeve shaft 31 and the mandrel 1 are matched through the first flat key 11, so that relative rotation between the sleeve shaft 31 and the mandrel 1 is prevented.

The inner sleeve 32 is a square inner sleeve, and the sleeve shaft 31 is a square sleeve shaft.

Referring to fig. 7 and 8, the outer ring of the square inner sleeve is circular, and a square hole is formed in the outer ring; the outer ring of the square sleeve shaft is square, and a round hole is formed in the outer ring; the diameter of the inner hole of the square sleeve shaft and the outer diameter of the mandrel 1 are phi A, and the square sleeve shaft is sleeved on the mandrel 1 through an inner round hole; the outer contour width of the square sleeve shaft and the hole width of the square hole in the square inner sleeve are W, the outer circle diameter of the square inner sleeve is phi B, and the square inner sleeve is sleeved on the square sleeve shaft through the square hole in the square inner sleeve; the elastic piece 34 is disposed between the outer sidewall of the square sleeve shaft and the inner sidewall of the square inner sleeve, so that the square inner sleeve can move relative to the square sleeve shaft.

Chamfer angles are arranged on two sides of the outer ring of the stretching ring 33.

It should be noted that, the chamfer is disposed on two sides of the stretching ring 33 along the axial direction thereof, and the arrangement of the chamfer can prevent the blank region 52 from being scratched or broken when the stretching ring 33 stretches the blank region 52 to a certain extent, thereby protecting the pole piece 5.

The tension ring 33 comprises a metal layer and a wear-resistant layer which are arranged from inside to outside, wherein the material of the wear-resistant layer is teflon, diamond-like carbon or ceramic.

For example, the material of the metal layer is steel or copper, and the surface of the metal layer is plated with a wear-resistant material, so that a wear-resistant layer is formed on the metal layer, the metal layer is connected with the outer ring of the first bearing 35, and the wear-resistant layer is used for contacting the blank area 52 of the pole piece 5, and the service life of the stretching ring 33 is prolonged due to the fact that the material of the wear-resistant layer is firm and durable.

Referring to fig. 9, the push roller assembly 4 includes a cylinder 41, a cylinder joint 42, and a push roller bearing 43, the cylinder joint 42 being connected between a piston rod of the cylinder 41 and the push roller bearing 43, the push roller bearing 43 being capable of abutting against the tension roller assembly 3.

The number of the push roller assemblies 4 is multiple, and each push roller assembly 4 corresponds to one stretching roller assembly 3; in the single push roller assembly 4, the cylinder 41 is fixedly connected with an external fixture (e.g., a frame), the cylinder joint 42 comprises a connecting cylinder 421 and a connecting shaft 422, the connecting cylinder 421 is connected with the connecting shaft 422, the axial directions of the connecting cylinder 421 and the connecting shaft 422 are perpendicular, a piston rod of the cylinder 41 extends into the connecting cylinder 421 and is connected with the inner wall of the connecting cylinder 421, one end of the connecting shaft 422, which is away from the connecting cylinder 421, is connected with the inner ring of the push roller bearing 43, and the outer ring of the push roller bearing 43 can be abutted against the stretching ring 33.

The air pressure in the air cylinder 41 is controlled by an independent proportional valve, and the thrust of the air cylinder 41 can be changed by adjusting the air pressure of the proportional valve, so that the stretching effect is adjusted; and each cylinder 41 is controlled by an independent proportional valve, so that the stretching force of each blank zone 52 can be independently controlled, the stretching effect of each blank zone 52 can be further adjusted, and the product quality is improved.

With continued reference to fig. 3 and 4, when the air pressure output by the proportional valve is 0, the piston rod of the air cylinder 41 does not extend, the push roller bearing 43 does not contact with the stretching ring 33, and the stretching ring 33 is far away from the blank area 52 of the pole piece 5 under the elastic force action between the square inner sleeve and the square sleeve shaft and the pressure action of the pole piece 5 on the stretching ring 33, so that the rolling stretching device is in the first working state.

Referring to fig. 10, in the embodiment of the present application, the center of the mandrel 1 is O1, the center of the inner sleeve 32 is O2, the outer ring diameter of the stretching ring 33 is Φe, the diameter of the supporting shaft is Φd, o1o2=0.5·e-0.5·d, and in the first operating state, the running path of the coating area 51 of the pole piece 5 coincides with the running path of the blank area 52, and at this time, the stretching ring 33 has no stretching effect on the blank area 52.

Referring to fig. 11-13, when the air pressure output by the proportional valve reaches a certain value, the piston rod of the air cylinder 41 pushes out to press the push roller bearing 43 against the stretching ring 33, at this time, the stretching ring 33 overcomes the elastic force of the elastic member 34 and the pressure of the pole piece 5 under the thrust of the air cylinder 41 to press the blank area 52 of the pole piece 5, at this time, the rolling stretching device is in the second working state, and in the second working state, the length of the travelling path of the blank area 52 of the pole piece 5 is longer than the length of the travelling path of the coating area 51, so that the blank area 52 is stretched.

Wherein the axis of the push roller bearing 43 is parallel to the axis of the spindle 1.

When the roller bearing 43 abuts against the tension ring 33, the roller bearing 43 and the tension ring 33 can rotate relatively, and the roller bearing 43 is less likely to wear the tension ring 33.

In addition, the rolling stretching device further comprises a first roller 6 and a second roller 7, and the first roller 6, the mandrel 1 and the second roller 7 are sequentially wound by the pole piece 5.

In the direction of the movement of the pole piece 5, the first passing roller 6 and the second passing roller 7 are symmetrically arranged on two sides of the mandrel 1, and the first passing roller 6 and the second passing roller 7 are higher than the mandrel 1, when the pole piece 5 sequentially winds the first passing roller 6, the mandrel 1 and the second passing roller 7, the first passing roller 6 and the second passing roller 7 can play a role in guiding and conveying the pole piece 5.

In practice, winding the pole piece 5 around the mandrel 1 refers to winding the pole piece 5 around the tension ring 33 and the backup roll 2 on the mandrel 1.

A second bearing 21 is provided between the support roller 2 and the spindle 1.

The inner ring of the second bearing 21 is connected with the mandrel 1, and the outer ring of the second bearing 21 is connected with the support roller 2, so that the support roller 2 can rotate relative to the mandrel 1; in the embodiment of the present application, two second bearings 21 are provided between the single backup roller 2 and the mandrel 1, the two second bearings 21 being provided at both ends of the single backup roller 2 in the own axis direction, respectively.

The rolling stretching device further comprises a flange seat 8, one end of the mandrel 1 is connected to the flange seat 8, and a second flat key 12 is arranged between the mandrel 1 and the flange seat 8.

The flange seat 8 is fixedly connected with an external fixed object (such as a rack), two flange seats 8 are symmetrically arranged, two ends of the mandrel 1 are respectively connected with the two flange seats 8, key grooves matched with second flat keys 12 are formed in the mandrel 1 and the flange seats 8, and the mandrel 1 is matched with the flange seats 8 through the second flat keys 12, so that the mandrel 1 and the flange seats 8 are prevented from rotating relatively; wherein the second flat key 12 is a C-shaped flat key.

In summary, the embodiment of the present application provides a rolling stretching device, which can control the stretching roller assembly 3 to be close to or far from the blank zone 52 of the pole piece 5 only by adjusting the air pressure output by the proportional valve, so that the length of the tape running path of the blank zone 52 is changed, and the stretching effect of the blank zone 52 is adjusted.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a roll-in stretching device, its characterized in that, including dabber (1), backing roll (2), stretching roller subassembly (3) and push roll subassembly (4), backing roll (2) with dabber (1) are all located to stretching roller subassembly (3) cover, just backing roll (2) with stretching roller subassembly (3) all can contact pole piece (5), backing roll (2) correspond with coating district (51) position of pole piece (5), stretching roller subassembly (3) correspond with the blank district (52) position of pole piece (5), stretching roller subassembly (3) can be moved relative dabber (1), push roll subassembly (4) set up in one side of dabber (1) is used for promoting towards pole piece (5) stretching roller subassembly (3), so that stretching roller subassembly (3) carry out the stretching to blank district (52) of pole piece (5).

2. The roll stretching device according to claim 1, wherein the stretching roller assembly (3) comprises a sleeve shaft (31), an inner sleeve (32), a stretching ring (33) and an elastic member (34), wherein the sleeve shaft (31) is sleeved on the mandrel (1), the inner sleeve (32) is sleeved on the sleeve shaft (31), the stretching ring (33) is sleeved on the inner sleeve (32), and the elastic member (34) is arranged between the outer side wall of the sleeve shaft (31) and the inner side wall of the inner sleeve (32), so that the inner sleeve (32) and the stretching ring (33) have a tendency to deviate from the movement of the pole piece (5).

3. The roll stretching apparatus as claimed in claim 2, wherein the stretching roller assembly (3) further comprises a first bearing (35), the first bearing (35) being arranged between the inner sleeve (32) and the stretching ring (33).

4. The roll stretching apparatus as claimed in claim 2, characterized in that a first flat key (11) is arranged between the sleeve shaft (31) and the mandrel (1).

5. The roll stretching apparatus as claimed in claim 2, wherein the stretching ring (33) comprises a metal layer and a wear-resistant layer arranged from inside to outside, the wear-resistant layer being of teflon, diamond-like carbon or ceramic.

6. The roll stretching apparatus as claimed in claim 1, wherein the push roller assembly (4) comprises a cylinder (41), a cylinder joint (42) and a push roller bearing (43), the cylinder joint (42) being connected between a piston rod of the cylinder (41) and the push roller bearing (43), the push roller bearing (43) being capable of abutting the stretching roller assembly (3).

7. The roll stretching apparatus as claimed in claim 6, characterized in that the axis of the push roller bearing (43) is parallel to the axis of the mandrel (1).

8. The roll stretching device according to claim 1, further comprising a first pass roller (6) and a second pass roller (7), wherein the first pass roller (6), the mandrel (1) and the second pass roller (7) are sequentially provided with a pole piece (5) to be wound.

9. The roll stretching apparatus as claimed in claim 1, characterized in that a second bearing (21) is arranged between the support roll (2) and the mandrel (1).

10. The roll stretching device according to claim 1, further comprising a flange seat (8), wherein one end of the mandrel (1) is connected to the flange seat (8), and a second flat key (12) is arranged between the mandrel (1) and the flange seat (8).