CN219615960U

CN219615960U - Compression roller assembly, wrinkle removing device and coating machine

Info

Publication number: CN219615960U
Application number: CN202320458272.0U
Authority: CN
Inventors: 单小正
Original assignee: Ningxia Baofeng Yuneng Technology Co Ltd
Current assignee: Ningxia Baofeng Yuneng Technology Co Ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-09-01
Anticipated expiration: 2033-03-10

Abstract

The utility model discloses a compression roller assembly, a wrinkle removing device and a coating machine, and relates to the technical field of lithium battery manufacturing equipment. The compression roller assembly comprises a fixing frame, a compression roller and two pressure adjusting pieces, wherein the two pressure adjusting pieces are respectively connected to two ends of the compression roller, the pressure adjusting pieces comprise a connecting part and a telescopic part, the telescopic part is connected with the fixing frame, the connecting part is respectively connected with the compression roller and the telescopic part, and when two ends of the compression roller move towards a direction close to or far away from a pole piece due to pole piece folds, the two telescopic parts respectively drive two ends of the compression roller to move towards a direction far away from or close to the pole piece so that the two ends of the compression roller are always at preset positions. The press roller assembly can automatically flatten the folds on the pole piece, does not need manual operation, reduces the cost and improves the production efficiency.

Description

Compression roller assembly, wrinkle removing device and coating machine

Technical Field

The utility model relates to the technical field of lithium battery manufacturing equipment, in particular to a compression roller assembly, a wrinkle removing device and a coating machine.

Background

The pole pieces are in inconsistent extension and other conditions due to tension in the production process, so that the pole pieces form folds to cause the problems of belt breakage, poor coating size and the like, and the pole pieces are required to be flattened to avoid the problems.

The existing coating machine generally cannot automatically adjust the flattened pole piece according to the conditions of the fold position, the fold degree and the like of the pole piece, so that the aim of uniformly flattening the pole piece is fulfilled by manually monitoring in real time and timely adjusting the coating machine. However, the manual operation has the defects of high cost, change of the adjusted standard and quality according to subjective consciousness of operators, possibility of various burst problems in the production process, incapability of timely responding by the operators, and reduction of the product yield.

Disclosure of Invention

In view of the above, the present utility model aims to overcome the defects in the prior art, and provides a press roll assembly, a wrinkle removing device and a coating machine, so as to solve the technical problems of high cost and low product yield caused by the fact that the coating machine in the prior art needs to perform the wrinkle removing operation manually.

The utility model provides:

a wrinkle removal device, comprising:

a fixing frame;

a press roller;

the two pressure adjusting parts are respectively connected to two ends of the press roller, the pressure adjusting parts comprise a connecting part and a telescopic part, the telescopic part is connected with the fixing frame, the connecting part is respectively connected with the press roller and the telescopic part, and when two ends of the press roller move in a direction close to or far away from the pole piece due to pole piece folds, the telescopic part respectively drives two ends of the press roller to move in a direction far away from or close to the pole piece so that two ends of the press roller are always in preset positions.

In addition, the press roll assembly according to the present utility model may have the following additional technical features:

in some embodiments of the present utility model, the fixing frame includes a first fixing seat and a second fixing seat that are disposed at intervals, the pressure adjusting member is disposed between the first fixing seat and the second fixing seat, the telescopic portion is connected to the first fixing seat, and the compression roller is suspended below the first fixing seat.

In some embodiments of the present utility model, the fixing frame further includes two long sides and two short sides, the two long sides and the two short sides are connected to form a rectangular structure, the two long sides are parallel to the expansion direction of the expansion part, the connecting part is sandwiched between the two long sides, and the connecting part can slide between the two long sides;

the first fixing seat and the second fixing seat are respectively arranged on one side of the two short sides opposite to each other.

In some embodiments of the present utility model, the number of the fixing frames is two, and the two fixing frames are respectively arranged at two ends of the press roller.

In some embodiments of the present utility model, one end of the telescopic portion is fixedly connected to the first fixing base, and the other end is fixedly connected to the connecting portion.

In some embodiments of the present utility model, two ends of the pressing roller are respectively penetrated through the two connecting parts, and the pressing roller and the connecting parts are rotatably connected.

In some embodiments of the utility model, the telescoping portion is a resilient device.

In some embodiments of the utility model, the surface of the press roll is provided with a coating that increases the coefficient of friction.

The utility model also provides a wrinkle removing device which comprises at least one group of press roller assemblies, wherein the press roller assemblies are arranged at intervals along the advancing direction of the pole piece.

The utility model also provides a coating machine comprising the wrinkle removing device.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a press roller assembly, which is characterized in that two pressure adjusting parts are respectively connected to two ends of a press roller, a telescopic part is connected with a fixing frame, and a connecting part is respectively connected with the press roller and the telescopic part. Like this, when the both ends of compression roller are moved to the direction that is close to or keeps away from the pole piece because of the pole piece fold, two the telescoping portion drives respectively the both ends of compression roller are kept away from or are close to the direction of pole piece and move so that the compression roller both ends are in the position of predetermineeing all the time, pressure regulating part is automatic according to the effort that the fold produced to the compression roller exert corresponding reaction force on the compression roller to the fold department on the roll-out pole piece surface makes pole piece everywhere have the same thickness, need not manual operation, has reduced the cost. Meanwhile, the problems that the quality of the product is unstable and the yield of the product is reduced due to the fact that personnel cannot respond in time in the production process caused by manual operation are avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, 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 utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a schematic view of a pressure roller assembly from a perspective in accordance with some embodiments of the utility model;

FIG. 2 illustrates a schematic view of a configuration of a pressure roller assembly from another perspective in accordance with some embodiments of the utility model;

fig. 3 illustrates a schematic diagram of a nip roll assembly in some embodiments of the utility model.

Description of main reference numerals:

100-a press roll assembly; 110-fixing frame; 111-a first fixing seat; 112-a second fixing seat; 113-two long sides; 114-two short sides; 120-pressing rolls; 130-pressure regulator; 131-a connection; 132—telescoping portion; 200-pole piece.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The pole piece is a key component of the lithium-ion battery, and the manufacturing process of the pole piece is as follows: firstly, coating electrode slurry on the surface of a current collector by using a coating machine, drying to enable the coated electrode slurry to be solidified on the surface of the current collector, and then rolling the pole piece by using a roller press to obtain the pole piece with a compact structure. However, when the pole piece is pressed by the roller press, the middle position of the pole piece is easy to generate a wrinkle phenomenon, and the wrinkle part of the pole piece is required to be flattened and wrinkle removed.

As shown in fig. 1 to 3, an embodiment of the present utility model provides a press roll assembly 100 mainly for flattening wrinkles of a surface of a pole piece. The press roller assembly 100 includes a fixing frame 110, a press roller 120, and two pressure adjusting members 130.

The two pressure adjusting members 130 are respectively connected to two ends of the press roller 120, the pressure adjusting members 130 include a connecting portion 131 and a telescopic portion 132, the telescopic portion 132 is connected to the fixing frame 110, and the connecting portion 131 is respectively connected to the press roller 120 and the telescopic portion 132.

Further, the fixing frame 110 includes a first fixing seat 111 and a second fixing seat 112 disposed at intervals, the pressure adjusting member 130 is disposed between the first fixing seat 111 and the second fixing seat 112, the telescopic portion 132 is connected to the first fixing seat 111, and the pressing roller 120 is suspended below the first fixing seat 111. In such a structure, when the pole piece 200 is fed, only the pressing roller 120 is lifted and the pressing roller 120 is placed on the surface of the pole piece 200, the pressing roller 120 presses the surface of the pole piece 200 under the action of gravity, and meanwhile, the pressure applied by the pressing roller 120 on the pole piece 200 can be changed by adjusting the length of the telescopic part 132. The pressure can be set according to the actual production requirement, and after the initial pressure setting is completed, the relative position between the press roller 120 and the surface of the pole piece 200 is the preset position.

When the two ends of the press roller 120 move in the direction approaching or separating from the pole piece 200 due to the fold of the pole piece 200, the two telescopic parts 132 respectively drive the two ends of the press roller 120 to move in the direction separating from or approaching to the pole piece 200, so that the two ends of the press roller 120 are always at the preset positions.

Specifically, the working principle of the press roller assembly 100 at the fold of the pole piece 200 is as follows:

the press roller 120 is moved to a preset position, and at this time, the pressures applied to the pole piece 200 by the two ends of the press roller 120 are F1 and F2, respectively, and it can be understood that the reaction forces generated by the pole piece 200 at the two ends of the press roller 120 are F3 and F4, f1=f3, and f2=f4, respectively.

During operation of the press roller assembly 100, when any position on the press roller 120 passes through the fold of the pole piece 200, the reaction force generated by the fold on the press roller 120 will increase, at this time, F1 < F3, F2 < F4, and both ends of the press roller 120 move away from the pole piece 200 due to the fold, and the two telescopic parts 132 extend in the direction close to the pole piece 200/preset position to increase F1 and F2 to f1=f3, f2=f4, so that the fold is automatically pressed.

When the pressing roller 120 is pressed and wrinkled, the reaction force applied to the two ends of the pressing roller 120 is recovered to the reaction force at the preset position, the telescopic part 132 is compressed in the direction away from the pole piece 200 until f1=f3 and f2=f4, and the pressing roller 120 returns to the preset position. The above-mentioned steps are repeatedly performed at the positions of the folds after encountering, and the fold removing operation of the pole piece 200 can be completed.

In the above-mentioned wrinkle removing process, the press roller assembly 100 automatically performs the lamination of the wrinkling part of the pole piece 200, so that the pole piece 200 has the same thickness everywhere, no manual operation is required, and the cost is reduced. Meanwhile, the problems that the product quality is unstable and the yield of the product is reduced due to the fact that personnel cannot respond in time in the production process caused by manual operation are avoided, and the production efficiency and the product quality are improved.

The existing pole piece can also be wrinkled due to feeding problems, such as uneven tension of the fed pole piece.

To solve the above problems, the two ends of the press roller 120 are respectively pressed on the left and right sides of the pole piece 200, the press roller 120 automatically adjusts to enable f1=f3 and f2=f4, so that the left and right stress of the pole piece 200 is uniform, and the problems of wrinkling, edge collapse, deviation rectification failure, uneven winding and the like of the pole piece 200 caused by uneven stress are prevented.

In addition, on the premise that the left and right stress of the pole piece 200 is uniform, the length of the press roller 120 is changed, so that the press roller 120 can be completely pressed on the surface of the pole piece 200, and the wrinkle removing effect of the material with large width and thin thickness can be obviously improved.

It should be noted that the preset position is a position for keeping the axis of the pressing roller 120 always parallel to the surface of the pole piece 200. The projected distance of the axis of the press roller 120 to the surface of the pole piece 200 along a direction perpendicular to the direction of travel of the pole piece 200 should be less than or equal to the radius of the press roller 120.

The fixing frame 110 further includes two long sides 113 and two short sides 114, the two long sides 113 and the two short sides 114 are connected to form a rectangular structure, the two long sides 113 are parallel to the extending direction of the extending portion 132, the connecting portion 131 is clamped between the two long sides 113, and the connecting portion 131 can slide between the two long sides 113. In this way, the connecting portion 131 can only move in the direction approaching or separating from the pole piece 200, so that the freedom degree in other directions is limited, and the slipping of the pressing roller 120 is avoided, so that the wrinkle removing efficiency is reduced.

In other embodiments, V-shaped grooves may also be provided on both long sides 113 to limit movement of the connection 131 in a direction toward or away from the pole piece 200.

The first fixing base 111 and the second fixing base 112 are respectively disposed on opposite sides of the two short sides 114. The pressure adjusting member 130, the first fixing base 111 and the second fixing base 112 are all disposed in the rectangular structure, so that the compactness and the integrity of the structure of the press roller assembly 100 are improved, and the size is reduced.

The number of the fixing frames 110 is two, and the two fixing frames 110 are respectively arranged at two ends of the press roller 120. Further, the expansion and contraction part 132 is a device having elastic force, preferably a compression spring or a rubber block.

One end of the telescopic part 132 is fixedly connected with the first fixing base 111, and the other end is fixedly connected with the connecting part 131.

It should be noted that, when the press roller assembly 100 does not perform the wrinkle removing operation, the two ends of the press roller 120 are placed on the two second fixing bases 112, so that the telescopic portion 132 is prevented from hanging the press roller 120 when it is idle, the loss of the telescopic portion 132 is increased, and the service life of the press roller assembly 100 is improved.

The two ends of the press roller 120 are respectively penetrated through the two connecting parts 131, and the press roller 120 is rotationally connected with the connecting parts 131. The connection portion 131 is a connection bearing or a suspension bearing, preferably a universal fish-eye rod knuckle bearing or a suspension ball bearing.

The surface of the pressing roller 120 is provided with a coating layer that increases the friction coefficient. Thereby improving the efficiency of flattening the wrinkles by the press roll 120.

As an example, a plurality of grooves along the axial direction of the pressing roller 120 may be formed on the surface of the pressing roller 120, and a filler may be disposed in the grooves, wherein the surface of the filler is flush with the surface of the pressing roller 120, and the friction coefficient of the surface of the filler is greater than that of the surface of the pressing roller 120.

It will be appreciated that the particles may also be uniformly coated on the surface of the platen roller 120, reducing the smoothness of the surface of the platen roller 120.

The utility model also provides a wrinkle removing device which comprises at least one group of press roller assemblies 100, wherein the press roller assemblies are arranged at intervals along the advancing direction of a pole piece. The wrinkle removing device has all the advantages of the roller assembly 100 in any of the above embodiments, and will not be described in detail herein.

In addition, when the wrinkle removing device is provided with a plurality of groups of press roller assemblies 100, at least one group of press roller assemblies 100 close to the feeding end can be arranged to perform wrinkle removing work, and the purpose of extending the pole piece 200 is achieved by changing the preset positions of the press rollers 120 in the subsequent groups of press roller assemblies 100.

As an example, the wrinkle removing device is provided with a first compression roller assembly and a second compression roller assembly which are arranged along the travelling direction of the pole piece, the first compression roller assembly can be arranged for wrinkle removing, and the preset positions of compression rollers in the second compression roller assembly are changed to increase the pressures F1 and F2 applied to the pole piece at the two ends of the compression rollers, so that the second compression roller assembly can extend the pole piece after wrinkle removing, and the practicability of the wrinkle removing device is improved. Of course, the first press roller assembly and the second press roller assembly can be arranged to perform wrinkle removal.

As an example, the wrinkle removing device has a first press roller assembly, a second press roller assembly, a third press roller assembly, and a fourth set of press roller assemblies disposed along the traveling direction of the pole piece, the first press roller assembly and the second press roller assembly being disposed for wrinkle removing work. The preset positions of the press rolls in the third press roll assembly and the fourth press roll assembly are changed so as to increase the pressures F1 and F2 exerted on the pole pieces by the two ends of the press rolls. Specifically, the pressure applied on the pole piece by the compression rollers in each group of compression roller assemblies can be set to be equal to the pressure of the first compression roller assembly=the second compression roller assembly < the third compression roller assembly < the fourth compression roller assembly, so that the third compression roller assembly and the fourth compression roller assembly can extend the pole piece after wrinkle removal, and the practicability of the wrinkle removal device is improved.

It will be appreciated that the number of press roll assemblies performing the de-wrinkling work and the number of press roll assemblies performing the stretching work may be set as desired.

The utility model also provides a coating machine, which comprises the wrinkle removing device and has all the beneficial effects of the wrinkle removing device, and the wrinkle removing device is not described in detail herein.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," 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 utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A pressure roller assembly, comprising:

a fixing frame;

a press roller;

2. The press roll assembly of claim 1, wherein the fixed frame comprises a first fixed seat and a second fixed seat which are arranged at intervals, the pressure adjusting piece is arranged between the first fixed seat and the second fixed seat, the telescopic part is connected with the first fixed seat, and the press roll is hung below the first fixed seat.

3. The press roll assembly according to claim 2, wherein the fixing frame further comprises two long sides and two short sides, the two long sides and the two short sides are connected to form a rectangular structure, the two long sides are parallel to the expansion and contraction direction of the expansion and contraction part, the connecting part is clamped between the two long sides, and the connecting part can slide between the two long sides;

4. A press roll assembly according to claim 3, wherein the number of the fixing frames is two, and the two fixing frames are respectively arranged at two ends of the press roll.

5. The press roll assembly according to claim 4, wherein one end of the telescopic part is fixedly connected with the first fixing base, and the other end is fixedly connected with the connecting part.

6. The press roll assembly according to claim 1, wherein two ends of the press roll are respectively penetrated through the two connecting parts, and the press roll is rotatably connected with the connecting parts.

7. A press roll assembly according to any one of claims 1 to 6, wherein the telescoping portion is a resilient device.

8. A press roll assembly according to any one of claims 1 to 6, characterized in that the surface of the press roll is provided with a coating layer which increases the coefficient of friction.

9. A wrinkle removing device comprising at least one set of press roller assemblies according to any one of claims 1 to 8, each of the press roller assemblies being disposed at intervals along the direction of travel of the pole pieces.

10. A coater comprising a wrinkle removing device as claimed in claim 9.