CN219151170U

CN219151170U - Device for improving rolling uniformity

Info

Publication number: CN219151170U
Application number: CN202223077205.9U
Authority: CN
Inventors: 王留军
Original assignee: Dongguan Higen Bytek Intelligent Equipment Co ltd
Current assignee: Dongguan Higen Bytek Intelligent Equipment Co ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-06-09
Anticipated expiration: 2032-11-18

Abstract

The utility model relates to the technical field of lithium battery pole piece production, in particular to a device for improving rolling uniformity, which comprises a frame housing, a main oil cylinder, an upper roller system and a lower roller system, wherein the upper roller system and the lower roller system are both rotatably arranged on the frame housing, the main oil cylinder is used for jacking the lower roller system so as to enable the lower roller system to be close to the upper roller system, and the device is characterized in that: the upper roller system and/or the lower roller system are/is respectively provided with an adjusting mechanism, and the adjusting mechanism is used for driving the upper roller system/the lower roller system to horizontally rotate so as to enable projection of the upper roller system and the lower roller system on a horizontal plane to be misplaced. The utility model adopts a mode of adjusting the included angle between the upper roller system and the lower roller system in the horizontal plane projection, so that the line contact between the pole piece and the roller system is changed into the point contact, the influence of the roller deformation on the rolling effect can be effectively reduced, and the rolling uniformity of the pole piece is improved.

Description

Device for improving rolling uniformity

Technical Field

The utility model relates to the technical field of lithium battery pole piece production, in particular to a device for improving rolling uniformity.

Background

With the great development of new energy automobiles, the demand of power batteries is rapidly increasing, and battery manufacturers pursue higher rolling speeds and pole piece widths in order to obtain higher yields. As the width of the pole piece increases, the width of the roller also progresses from 300, 400mm and other narrow widths to 700, 800mm, even 1200, 1300, 1500 and 1600mm. However, as the width of the roll changes, the roll width ratio (roll width/roll diameter) increases. The large width-diameter ratio influences deflection deformation of the roller, so that the phenomenon that the middle thickness and the two sides of the rolled pole piece are thin under the intervention of no means of the roller press is caused; and the elastic deformation of the roller is caused by the influence of the contact stress of the roller and the pole piece, especially the deformation generated at the width edge of the pole piece causes the phenomenon that the thickness of the edge of the pole piece is suddenly reduced.

In order to solve the problem that the middle of the pole piece is thick and the two sides are thin, the scheme adopted at present is as follows: the bending cylinder device (also called a bending roller device) is utilized to enable the roller to generate deflection deformation opposite to the deflection deformation during rolling, so that the thickness uniformity of the pole piece is improved. However, the use of the bending cylinder device increases the rated dynamic load of the roller bearing, and generates harmful load to the roller, the roller bearing and the like, so that the equipment adopting the bending cylinder device has the phenomena of reduced service life, abnormal sound, heating and the like of the bearing with different degrees; the bending cylinder device cannot improve the edge dip phenomenon of the pole piece, and each battery manufacturer can only adopt a pole piece edge thinning mode to cope with the problem in a coating stage, but the edge thinning has an influence on the compaction density of the pole piece, namely the pole piece density at the edge is smaller than that at other positions, and the capacity of the battery is further influenced.

In view of the foregoing, there is a need for a solution that can achieve the effect of uniformly compacting the pole piece without using a cylinder bending device and thinning the edge of the pole piece.

Disclosure of Invention

The utility model provides a device for improving the uniformity of rolling, aiming at the problems in the prior art, and the relative angle of projection of an upper roller system and a lower roller system on a horizontal plane is adjusted, so that the rolling position is changed, and the effect of improving the uniformity of pole pieces is achieved.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a device for improving rolling uniformity, which comprises a frame housing, a master cylinder, an upper roller system and a lower roller system, wherein the upper roller system and the lower roller system are both rotatably arranged on the frame housing, and the master cylinder is used for jacking the lower roller system to enable the lower roller system to be close to the upper roller system, and is characterized in that: the upper roller system and/or the lower roller system are/is respectively provided with an adjusting mechanism, and the adjusting mechanism is used for driving the upper roller system/the lower roller system to horizontally rotate so as to enable projection of the upper roller system and the lower roller system on a horizontal plane to be misplaced.

Further, the adjusting mechanism comprises two adjusting components which are respectively arranged at two sides of the upper roller system or the lower roller system, the adjusting components comprise two adjusting rods, the two adjusting rods respectively abut against two ends of one side of the upper roller system/the lower roller system, and the two adjusting rods are matched to drive one side of the upper roller system/the lower roller system to move.

Still further, the regulation subassembly still includes two nuts, adjusts the pole and is the screw rod, and two nuts are all installed in the frame memorial archway, two regulation poles and two nuts one-to-one spiro union.

Preferably, the frame housing has an upper roller mounting position and a lower roller mounting position, the upper roller system and the lower roller system respectively have bearing seats, the upper roller system and the lower roller system are arranged at the upper roller mounting position/the lower roller mounting position, and the width of the upper roller mounting position and the width of the lower roller mounting position are both larger than the width of the bearing seats.

Furthermore, the adjusting mechanism further comprises two gaskets, and the screw rod is in contact with the upper roller system/the lower roller system through the gaskets.

Preferably, the pad comprises a convex pad and a concave pad, the convex pad is arranged between the concave pad and the adjusting rod, the concave end of the concave pad is abutted against the convex section of the convex pad, and the other end of the concave pad is abutted against the bearing seat.

Still further, the regulation subassembly still includes the scale, and the scale sets up in the frame torii, and the scale is used for the feedback regulation pole to insert the degree of depth of upper roller system/lower roller system.

The utility model has the beneficial effects that: the utility model adopts a mode of adjusting the included angle between the upper roller system and the lower roller system in the horizontal plane projection, so that the line contact between the pole piece and the roller system is changed into the point contact, the influence of the roller deformation on the rolling effect can be effectively reduced, and the rolling uniformity of the pole piece is improved.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic diagram showing the cooperation of the upper roller system and the adjusting mechanism.

Fig. 3 is a schematic diagram of the present utility model.

FIG. 4 is a schematic view of the upper and lower roll systems of the present utility model in one operating condition.

Reference numerals: 1-frame housing, 2-master cylinder, 3-upper roller system, 4-lower roller system, 5-adjusting mechanism, 31-roller, 32-bearing seat, 6-adjusting component, 61-adjusting rod, 62-gasket, 63-nut, 64-convex pad, 65-concave pad, 66-scale.

Detailed Description

The utility model will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the utility model. The present utility model will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the device for improving rolling uniformity provided by the utility model comprises a frame housing 1, an upper roller system 3 and a lower roller system 4, wherein the upper roller system 3 and the lower roller system 4 are both rotatably arranged on the frame housing 1, the upper roller system 3 and/or the lower roller system 4 are respectively provided with an adjusting mechanism 5, and the adjusting mechanism 5 is used for driving the upper roller system 3/the lower roller system 4 to horizontally rotate so as to enable the projection of the upper roller system 3 and the lower roller system 4 on a horizontal plane to be misplaced.

In actual use, the frame housing 1 is provided with a main oil cylinder 2, the main oil cylinder 2 is arranged in the frame housing 1 and is used for jacking up the lower roller system 4, and the upper roller system 3 and the lower roller system 4 are preferably respectively provided with an adjusting mechanism 5, and the utility model can adopt the following method:

A. obtaining the roller diameter D of the upper roller system 3 and the lower roller system 4 _w The width B of the pole piece and the equivalent convexity C between the upper roller system 3 and the lower roller system 4 _r ；

B. According to D _W B and C _r Calculating a crossing angle theta;

C. controlling the upper roller system 3 and the lower roller system 4 to rotate relatively according to the crossing angle theta so that the included angle between the projections of the upper roller system 3 and the lower roller system 4 on the horizontal plane is theta;

D. the master cylinder 2 is controlled to jack up the lower roller system 4, so that the upper roller system 3 and the lower roller system 4 are matched to roll the pole piece, and the thickness error of any position of the pole piece rolled by the upper roller system 3 and the lower roller system 4 is within an allowable range.

Specifically, when the upper roll system 3 and the lower roll system 4 are dislocated, the positions where the rolling is performed between the two are inevitably changed, and the positions where the two should be originally opposite are also dislocated due to the dislocation, so that the gap between the two is correspondingly changed, and the concept C of equivalent convexity is introduced in the present utility model _r That is, the convexity after the dislocation of the upper roll system 3 and the lower roll system 4 is shown at the same position.

The longer the length of the roller is, the more easily the middle part of the roller is deformed by deflection caused by rolling force, namely the middle top part of the roller is bent, so that the phenomena of thick middle and thin two sides are generated when the pole piece is pressed.

Compared with the prior art, the utility model adopts the bending cylinder device, the relative angle between the upper roller system 3 and the lower roller system 4 is adjusted, the upper roller system 3 and the lower roller system 4 form the equivalent convexity roller because of crossing each other, so that the overlapping position of the upper roller system 3 and the lower roller system 4 in the vertical direction is reduced, when rolling is performed, the overlapping position between the upper roller system 3 and the lower roller system 4 is reduced, and the rolling position of the roller system with angle modulation thickness is also changed, so that the distribution of the pole piece raw material stress is more uniform, the distribution of the pole piece raw material after rolling is more uniform, and the phenomenon that the middle thickness and the two sides are thin can not occur.

In this embodiment, the adjusting mechanism 5 includes two adjusting assemblies 6 respectively disposed on two sides of the upper roller system 3 or the lower roller system 4, the adjusting assemblies 6 include two adjusting rods 61, the two adjusting rods 61 respectively abut against two ends of one side of the upper roller system 3/the lower roller system 4, and the two adjusting rods 61 are matched to drive one side of the upper roller system 3/the lower roller system 4 to move.

In actual use, the adjusting assembly 6 further comprises two nuts 63, the adjusting rods 61 are screws, the two nuts 63 are mounted on the frame housing 1, and the two adjusting rods 61 are in one-to-one corresponding screw connection with the two nuts 63. And the structure of the upper roller system 3 and the lower roller system 4 is basically identical: the machine frame housing 1 is mainly composed of a roller 31 and bearing blocks 32 on two sides, wherein the machine frame housing 1 is provided with an upper roller installation position 11 and a lower roller installation position 12, the bearing blocks 32 are positioned on the upper roller installation position 11 or the lower roller installation position 12, and the widths of the upper roller installation position 11 and the lower roller installation position 12 are larger than the length of the bearing blocks 32, so that the bearing blocks 32 can move on the upper roller installation position 11 or the lower roller installation position 12.

For example, in fig. 2, when the upper roller system 3 is to be controlled to rotate, only the right lower and left upper adjusting rods 61 need to be screwed to move the two adjusting rods 61 in the direction of the roller 31, and the left lower and right upper adjusting rods 61 are retracted, so that the right bearing housing 32 is moved upward, and the left bearing housing 32 is moved downward, thereby driving the roller 31 to rotate counterclockwise. The utility model can adjust the rotation of the roller 31 only by screwing the adjusting rod 61, so the action is more convenient, and the threaded connection can effectively convert the rotation action into the linear action to improve the precision of the linear action, so the rotation angle of the roller 31 is more controllable.

Specifically, the adjusting mechanism 6 further includes two gaskets 62, and the screw 61 abuts against the upper roller system 3/the lower roller system 4 through the gaskets 62.

In actual use, the spacer 62 includes a convex pad 64 and a concave pad 65, the convex pad 64 is disposed between the concave pad 65 and the adjusting rod 61, the concave end of the concave pad 65 abuts against the convex section of the convex pad 64, and the other end of the concave pad 65 abuts against the bearing seat 32. The gasket 64 prevents the adjusting rod 61 from directly rigidly colliding with the bearing seat 32, and plays a role in buffering, so that the service lives of the bearing seat 32 and the adjusting rod 61 are prolonged.

Specifically, the adjusting assembly 6 further includes a scale 66, the scale 66 is disposed on the housing space 1, and the scale 66 is used for feeding back the depth of the adjusting rod 61 inserted into the upper roller system 3/the lower roller system 4. That is, the above scheme further includes a step EX. of calculating a linear relationship between the depth H of insertion of the adjustment lever 61 into the upper roller system 3/lower roller system 4 and the rotation angle α of the upper roller system 3/lower roller system 4.

That is, before the above method is used, it is preferable to sort and summarize the correlation between the depth of insertion of the adjusting rod 61 into the roller system and the rotation angle of the roller system, and then, when the relative angle between the two roller systems is adjusted by calculating the crossing angle θ, the adjustment can be directly performed only according to the data of the adjusting rod 61 corresponding to the scale 66, and the angle measurement is not performed in other manners, thereby being beneficial to improving the efficiency.

In addition, the adjusting mechanism 5 adopted in the embodiment is one of the optimal schemes, but other adjusting modes still exist, for example, a linear driving module, a motor, a screw rod structure and the like are adopted, and the upper roller system 3/the lower roller system 4 can be controlled to horizontally rotate; these structures are conventional and will not be described in detail herein.

Specifically, in step B, the formula is followed

The intersection angle θ is calculated.

Specifically, calculate the equivalent convexity C _r The way of (2) is as follows:

A1. acquiring the height S at the middle part of the gap between the upper roller system 3 and the lower roller system 4 in the initial state _c ；

A2. The upper roller system 3 and the lower roller system 4 are controlled to rotate relatively, and the height S at the middle part of the gap between the upper roller system 3 and the lower roller system 4 is measured _c ；

A3. According to C _r ＝S _y -S _c Calculating equivalent convexity C _r 。

The present utility model is not limited to the preferred embodiments, but is intended to be limited to the following description, and any modifications, equivalent changes and variations in light of the above-described embodiments will be apparent to those skilled in the art without departing from the scope of the present utility model.

Claims

1. The utility model provides a promote device of roll-in degree of consistency, includes frame memorial archway, master cylinder, goes up roller system and lower roller system all rotate and set up in the frame memorial archway, and master cylinder is used for jack-up lower roller system so that lower roller system is close to roller system, its characterized in that: the upper roller system and/or the lower roller system are/is respectively provided with an adjusting mechanism, and the adjusting mechanism is used for driving the upper roller system/the lower roller system to horizontally rotate so as to enable projection of the upper roller system and the lower roller system on a horizontal plane to be misplaced.

2. The apparatus for improving roll uniformity as set forth in claim 1, wherein: the adjusting mechanism comprises two adjusting components which are respectively arranged at two sides of the upper roller system or the lower roller system, the adjusting components comprise two adjusting rods, the two adjusting rods respectively abut against two ends of one side of the upper roller system/the lower roller system, and the two adjusting rods are matched to drive one side of the upper roller system/the lower roller system to move.

3. The apparatus for improving roll uniformity as set forth in claim 2, wherein: the adjusting assembly further comprises two nuts, the adjusting rods are threaded rods, the two nuts are mounted on the machine frame housing, and the two adjusting rods are in one-to-one corresponding threaded connection with the two nuts.

4. The apparatus for improving roll uniformity according to claim 3, wherein: the frame housing is provided with an upper roller installation position and a lower roller installation position, the upper roller system and the lower roller system are respectively provided with a bearing seat, the bearing seats are arranged at the upper roller installation position/the lower roller installation position, and the widths of the upper roller installation position and the lower roller installation position are both larger than the widths of the bearing seats.

5. The apparatus for improving roll uniformity as set forth in claim 2, wherein: the adjusting mechanism further comprises two gaskets, and the screw rod is in contact with the upper roller system/the lower roller system through the gaskets.

6. The apparatus for improving roll uniformity as set forth in claim 5, wherein: the pad comprises a convex pad and a concave pad, the convex pad is arranged between the concave pad and the adjusting rod, the concave end of the concave pad is abutted against the convex section of the convex pad, and the other end of the concave pad is abutted against the bearing seat.

7. The apparatus for improving roll uniformity as set forth in claim 2, wherein: the adjusting component further comprises a scale, the scale is arranged on the housing, and the scale is used for feeding back the depth of the adjusting rod inserted into the upper roller system/the lower roller system.