CN220479716U

CN220479716U - Roll shaft for rolling pole lugs and roll squeezer

Info

Publication number: CN220479716U
Application number: CN202321895499.8U
Authority: CN
Inventors: 杨振印; 云雷; 张文凯
Original assignee: Tianneng New Energy Huzhou Co ltd
Current assignee: Tianneng New Energy Huzhou Co ltd
Priority date: 2023-07-19
Filing date: 2023-07-19
Publication date: 2024-02-13
Anticipated expiration: 2033-07-19

Abstract

The roll shaft and the roll squeezer for rolling the tab comprise a roll shaft, wherein at least one group of roll bar groups are formed on the surface of the roll shaft, the at least one group of roll bar groups are arranged along the length direction of the roll shaft, each roll bar group consists of a plurality of roll bars, the roll bars are arranged along the axial direction of the roll shaft, and the plurality of roll bars are circumferentially distributed on the surface of the roll shaft; compared with the prior art, through setting up at the roller surface and by the roll-in strip group that a plurality of roll-in strip is constituteed, every roll-in strip sets up along the axial direction of roller, and a plurality of roll-in strips circumference distribute on the roller surface, when rolling in the tab, the roll-in strip forms continuous horizontal indentation on the tab surface for the tab surface forms horizontal continuous strengthening rib, improves the internal stress of tab, has strengthened holistic bending strength and bending rigidity of tab, effectively solves the problem of buckling of tab in the winding process.

Description

Roll shaft for rolling pole lugs and roll squeezer

Technical Field

The utility model relates to the technical field of lithium battery production and manufacturing, in particular to a roll shaft and a roll squeezer for rolling a tab.

Background

In the lithium ion battery production process, the thickness of the electrode lug of the negative electrode pole piece is only 6 microns, so that the electrode lug is easily folded and then rolled into the electrode roll during laser die cutting, and the poor winding core is easily caused during the winding of the next working procedure.

For solving above-mentioned problem, chinese patent application number 201721647133.3 discloses a utmost point ear shaping compression roller, and the utmost point ear shaping compression roller of above-mentioned disclosure, including being first roller and the second roller of upper and lower direction parallel arrangement on the compression roller support frame, first roller and second roller on be equipped with respectively and carry out first compression roller and the second compression roller of roll-in to the utmost point ear, first compression roller and second compression roller be the columnar roller, and evenly be provided with the concave part on the roll surface of first compression roller, interval adjustable between first compression roller and the second compression roller, the compression roller support frame on still be equipped with the inductor that is used for detecting the utmost point ear position, inductor and controller link to each other. According to the technical scheme, the first press roller and the second press roller are arranged to roll and shape the cut tab, so that good control on tab folding can be realized during the winding of the pole piece in the later stage, and meanwhile, in the moving process of the pole piece, the driving motor can control the relative distance between the first press roller and the second press roller, so that only the tab is rolled without damaging the tab. The Chinese patent with the application number of 201820710535.1 discloses a lug embossing roller of a lithium battery, and the lug embossing roller comprises a roller, a fixing part and a circular boss; the two ends of the roller are provided with fixing parts in an extending way, and the fixing parts are annular; the fixing part is uniformly provided with a plurality of mounting holes along the periphery thereof; the diameter of the fixing part is smaller than that of the roller; a plurality of round bosses are uniformly distributed on the periphery of the roller. In the specific working process of the lithium battery tab embossing roller of the embodiment, the roller rotates along with the running of the pole piece; the round boss at the periphery of the roller is directly contacted with the lug, and round indentations which are uniformly distributed are applied to the lug by the round boss, so that reinforcing ribs are formed on the surface of the lug, the internal stress of the lug is improved, the integral bending rigidity of the lug is further improved, and the problem that the lug bends and bends when passing through the roller in a winding link is effectively solved on the premise of ensuring the overcurrent capacity and the welding performance of the lug; the equipment is convenient to replace, has lower cost and is suitable for large-scale application in the production process of the coiled lithium battery.

The roller surface is provided with the plurality of circular bosses, and when the lug is rolled, the inner stress of the lug is improved by rolling the plurality of circular bosses on the roller, but in the actual use process, the inner stress formed by pressing the lug into the punctiform concave-convex points is smaller due to the fact that the circular bosses are distributed more dispersedly, the required strength of the lug cannot be achieved, and the lug still has bad conditions when being folded.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a roll shaft and a roll squeezer for rolling the tab, which can improve the internal stress of the tab and increase the bending strength of the tab.

In order to achieve the above object, the present utility model adopts the following technical scheme: the utility model provides a roller for utmost point ear roll-in, includes the roller, the surface of roller is formed with at least a set of roll-in strip group, and at least a set of roll-in strip group sets up along the length direction of roller, the roll-in strip group comprises a plurality of roll-in strips, and the roll-in strip sets up along roller axial direction, and a plurality of roll-in strips circumference formula distributes in the surface of roller.

As a preferable scheme of the utility model, at least two roller strip groups are formed on the surface of the roller shaft, and gaps are formed between adjacent roller strip groups.

As a preferable mode of the present utility model, the positions of the rolling bars on the adjacent rolling bar groups correspond to each other.

As a preferable mode of the present utility model, the roll bar has a long strip structure.

As a preferable mode of the utility model, the cross section of the rolling bar is in a circular arc structure.

As a preferable mode of the utility model, the cross section of the rolling bar is of a trapezoid structure.

As a preferable mode of the utility model, the cross section of the rolling bar is rectangular.

As a preferable scheme of the utility model, two ends of the roll shaft are provided with rotating shafts fixedly connected with the roll shaft, and two ends of the roll shaft are provided with bearings for fixing the roll shaft.

A roller press comprises a roller shaft for rolling a tab.

As a preferable scheme of the utility model, the bearing is sleeved on the rotating shaft and fixedly arranged on the roller press.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the roll bar group which is arranged on the surface of the roll shaft and consists of a plurality of roll bars, each roll bar is arranged along the axial direction of the roll shaft, the plurality of roll bars are circumferentially distributed on the surface of the roll shaft, and when the tab is rolled, the roll bars form continuous transverse indentation on the surface of the tab, so that the surface of the tab forms transverse continuous reinforcing ribs, the internal stress of the tab is improved, the integral bending strength and bending rigidity of the tab are enhanced, and the bending problem of the tab in the winding process is effectively solved;

2. furthermore, the cross section of the roll pressing strip is in a circular arc, trapezoid or rectangle structure, so that the roll pressing strip forms an indentation with a required shape on the surface of the tab, the risk of breakage or deformation of the tab in the roll pressing process can be changed while the internal stress of the tab is improved, and the bending strength and bending rigidity of the tab are improved.

Drawings

FIG. 1 is a schematic view of a first embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of the present utility model;

FIG. 3 is a schematic view of a third embodiment of the present utility model;

FIG. 4 is a schematic diagram of a fourth embodiment of the present utility model;

FIG. 5 is a schematic diagram of a fifth embodiment of the present utility model;

reference numerals: the roller shaft 1, the rolling bar group 2, the rolling bars 201, the gap 202, the rotating shaft 3 and the bearing 4.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Embodiment one:

as shown in FIG. 1, a roll shaft for pole ear rolling comprises a roll shaft 1, wherein a group of rolling strip groups 2 are formed on the surface of the roll shaft 1, the rolling strip groups 2 are arranged along the length direction of the roll shaft 1, each rolling strip group 2 consists of a plurality of rolling strips 201, the rolling strips 201 are arranged along the axial direction of the roll shaft 1, and the rolling strips 201 are circumferentially distributed on the surface of the roll shaft 1.

The plurality of rolling strips 201 are distributed on the surface of the roll shaft 1 at equal intervals, and when the tabs are rolled, transverse continuous indentations are formed on the surfaces of the tabs through the plurality of rolling strips 201, so that the internal stress of the tabs is improved, and the bending strength and the bending rigidity of the tabs are enhanced.

Further, the rolling bar 201 has a strip structure, and a gap is formed between two ends of the rolling bar 201 and two ends of the roller shaft 1, so that the influence of the rolling bar 201 on the rotating bearing of the roller shaft 1 is prevented.

In addition, the length of the roll bar 201 is greater than the width of the tab, so that the roll bar 201 is ensured to completely cover the surface of the tab when the tab is rolled.

The axis of rotation 3 with roller 1 fixed connection is equipped with at roller 1 both ends, and roller 1 both ends all are equipped with the bearing 4 that is used for fixed roller 1, and axis of rotation 3 sets up along the axial direction of roller 1, and the axis of rotation 3 and the axis coincidence of roller 1.

Further, the bearing 4 is sleeved on the rotating shaft 3, the bearing 4 is fixedly connected with the rotating shaft 3, the rotating shaft 3 is abutted with the inner ring of the bearing 4, and the fixing of the rotating shaft 3 is realized through the bearing 4.

The utility model provides a roll squeezer, includes the roller that is used for the utmost point ear roll-in, and bearing 4 is fixed to be set up on the roll squeezer, and roller 1 passes through bearing 4 rotation with the roll squeezer and is connected.

Embodiment two:

as shown in fig. 2, on the basis of the first embodiment, at least two rolling bar groups 2 are formed on the surface of the roll shaft 1, and gaps 202 are formed between adjacent rolling bar groups 2, and the number of the specific rolling bar groups 2 to be set on the roll shaft 1 is determined according to the length of the roll shaft 1 and the width of the tab to be rolled.

Through the roll bar group 2 of two at least groups that set up, when roller 1 carries out the roll-in to the utmost point ear, when guaranteeing roll bar 2 to the continuity of the indentation that produces when the utmost point ear roll-in, also make between the horizontal adjacent indentation on the utmost point ear form by the space to ensure that the utmost point ear can not take place to curl the condition in the middle of from both sides in the roll-in process, thereby guaranteed the horizontal roughness of utmost point ear, improved utmost point ear roll-in quality.

Further, the positions of the rolling strips 201 on the adjacent rolling strip groups 2 are corresponding, so that the staggered arrangement of the rolling strips 201 of the adjacent rolling strip groups 2 is avoided.

Embodiment III:

as shown in fig. 3, on the basis of the first embodiment and the second embodiment, the cross section of the rolling strip 201 is in a circular arc structure, the rolling strip 201 with the circular arc structure is rolled to form circular arc indentations on the tab, and the rolling strip 201 with the circular arc cross section can realize better stress distribution, so that the tab can bear force uniformly when being stressed; this helps to reduce stress concentrations and reduces the risk of cracking or deformation of the tab; further, the rolling bar 201 with the circular arc-shaped section can provide a larger section area, so that the bending strength of the tab is increased; the arc shape of the roll pressing bar 201 can increase the section moment of inertia, so that the tab can better resist bending stress caused by external load, and the bending strength is improved.

In addition, the rolling bars with circular arc-shaped cross sections have higher bending rigidity, namely, lower deformation under stress. This helps to maintain the shape stability of the tab, reduces deformation, and enables the tab to better maintain its original shape and function.

Example IV

As shown in fig. 4, on the basis of the first embodiment and the second embodiment, the cross section of the rolling bar 201 is a trapezoid structure, a rectangular indentation is formed on the tab by rolling the rolling bar 201 with the trapezoid structure, and the rolling bar 201 with the trapezoid cross section can provide a larger cross section area relative to the circular arc cross section, so that the bending strength of the tab is increased; the bottom of the trapezoid cross-section rolling bar 201 is wider, so that stress can be effectively dispersed, stress concentration is reduced, and the bearing capacity of the lug is improved.

Further, compared with the arc-shaped section, the trapezoid-section rolling bar 201 has higher bending rigidity, and the top of the trapezoid-section rolling bar 201 is narrower, so that the trapezoid-section rolling bar 201 deforms less when being stressed, the shape stability of the tab can be better maintained, and the deformation is reduced.

In addition, the roll-in strip 201 of trapezoidal cross section can provide stable support to on transmitting the whole width of utmost point ear with the atress, reduce the local deformation of utmost point ear, owing to trapezoidal cross section has wider bottom, can support utmost point ear better, reduce the atress and concentrate, improve the stability of utmost point ear.

Example five

As shown in fig. 5, on the basis of the first embodiment and the second embodiment, the cross section of the rolling bar 201 is in a rectangular structure, a rectangular indentation is formed on the tab by rolling the rolling bar 201 with the rectangular structure, and the rectangular cross section rolling bar 201 has a larger cross section area relative to the arc-shaped and trapezoid cross sections, so that the bending strength of the tab is increased, the width and the height of the rectangular cross section rolling bar 201 are larger, the stress can be effectively dispersed, a larger cross section moment of inertia is provided, and the bearing capacity of the tab is increased.

Further, compared with arc-shaped and trapezoid-shaped sections, the rectangular-section rolling bar 201 has higher bending rigidity, and the edges of the rectangular-section rolling bar 201 are straight, so that the rectangular-section rolling bar 201 deforms less when being stressed, the shape stability of the tab can be better maintained, and the deformation is reduced.

In addition, the rectangular cross-section roll-bar 201 can achieve better stress distribution, so that the tabs can bear force uniformly when stressed, and as the rectangular cross-section roll-bar 201 has obvious edges, uniform support can be provided, stress concentration is reduced, and the risk of cracking or deformation of the tabs is reduced.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model; thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more herein: the terms roll shaft 1, roll bar set 2, roll bar 201, gap 202, rotation shaft 3, bearing 4, etc. do not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. A roller for utmost point ear roll-in, its characterized in that includes roller (1), the surface of roller (1) is formed with at least a set of roll-in strip group (2), and at least a set of roll-in strip group (2) set up along the length direction of roller (1), roll-in strip group (2) are constituteed by a plurality of roll layering (201), and roll layering (201) set up along roller (1) axial direction, and a plurality of roll layering (201) circumference are distributed in the surface of roller (1).

2. The roll shaft for pole ear rolling according to claim 1, wherein at least two rolling bar groups (2) are formed on the surface of the roll shaft (1), and gaps (202) are formed between adjacent rolling bar groups (2).

3. A roll shaft for tab roll-in according to claim 2, characterized in that the roll bars (201) on adjacent roll bar groups (2) are positioned in correspondence.

4. A roll shaft for tab roll-in according to claim 3, characterized in that the roll bar (201) is of an elongated structure.

5. A roll shaft for tab roll-in according to claim 1, characterized in that the cross section of the roll bar (201) is of circular arc configuration.

6. A roll shaft for tab roll-in according to claim 1, characterized in that the cross section of the roll bar (201) is of a trapezoidal structure.

7. A roll shaft for tab roll-in according to claim 1, characterized in that the roll bar (201) has a rectangular cross section.

8. The roll shaft for pole ear rolling according to claim 1, wherein the roll shaft (1) is provided with a rotating shaft (3) fixedly connected with the roll shaft (1) at two ends, and bearings (4) for fixing the roll shaft (1) are arranged at two ends of the roll shaft (1).

9. A roll press comprising the roll shaft for tab roll pressing according to any one of claims 1 to 8.

10. A roller press according to claim 9, characterized in that the bearing (4) is sleeved on the rotating shaft (3), and the bearing (4) is fixedly arranged on the roller press.