CN219324963U

CN219324963U - Electrode lug embossing device

Info

Publication number: CN219324963U
Application number: CN202320075913.4U
Authority: CN
Inventors: 何金超; 胡毅铭
Original assignee: Rept Battero Energy Co Ltd
Current assignee: Rept Battero Energy Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-07-11
Anticipated expiration: 2033-01-10

Abstract

The utility model provides a tab embossing device which comprises an embossing roller, wherein at least one strip-shaped reinforcing rib and a plurality of uniformly arranged point-shaped reinforcing ribs are distributed on the periphery of the embossing roller, and the strip-shaped reinforcing ribs and the plurality of point-shaped reinforcing ribs are distributed on the periphery of the embossing roller. The utility model has reasonable structure, ingenious design and lower cost. The utility model solves the technical problems of poor expansion caused by off-couch and embossing of the pole lugs and foot tilting of the pole lugs by combining the structure of the strip-shaped reinforcing ribs on the basis of the traditional dot-shaped reinforcing ribs.

Description

Electrode lug embossing device

Technical Field

The utility model relates to the field of battery processing, in particular to a lug embossing device.

Background

With the development of batteries, the application occasions of the batteries are more and more, and the production technology of the batteries is required to be higher and higher, the tab is an indispensable component of the batteries, and the tab is processed by cutting the side edge of the pole piece in a laser cutting or hardware die cutting mode and is wound into a winding core along with the pole piece. Due to the characteristics of the geometry and the material of the tab, uneven shearing force can be generated on the surface of the tab in the winding process, and wrinkling, bending and the like can be easily generated under the condition of being subjected to tiny disturbance, so that the charge and discharge and even the safety performance of the winding core are influenced. Therefore, the improvement of the bending rigidity of the tab has important significance for the production efficiency and yield of the wound battery.

The embossing roller is one of important structures for improving the bending rigidity of the tab, but the embossing roller is conventional equidistant bar-shaped embossing, the wavy edges of the foil are easy to cause in the embossing process, the excessive extension is easy to cause because the bars are relatively close to each other, the cutting is not easy to be performed, and the die-cutting tab is easy to appear in the phenomenon of falling down or tilting feet.

The patent document CN206153835U discloses a lug knurling structure. The pole lug knurling structure comprises a pole piece passing roller, a passing roller shaft, a support, a fixing seat, a guide shaft, a spring guide shaft, a knurling wheel shaft fixing seat, a shaft, a pressing wheel and a knurling pressing wheel, wherein the pole piece passing roller is connected to the support through the passing roller shaft, the fixing seat is connected between the two supports, and the upper part of the fixing seat is connected with the knurling wheel shaft fixing seat through the guide shaft and the spring guide shaft; the knurled wheel shaft fixing seat is provided with a shaft, the shaft is provided with a pressing wheel and a knurled pressing wheel, and the pressing wheel and the knurled pressing wheel are correspondingly arranged in parallel with the pole piece passing roller. But the above scheme is complicated in structure.

The utility model patent with the patent document of CN206824462U discloses a tab reinforcing indentation mechanism which comprises a second shaft and a fourth shaft which can rotate in opposite directions, wherein the shaft ends of the second shaft and the fourth shaft are respectively power input ends; two ends of the second shaft are respectively and rotatably arranged in the first bearing seat and the second bearing seat, and two ends of the fourth shaft are respectively and rotatably arranged in the third bearing seat and the fourth bearing seat; a driving roller which rotates along with the second shaft is fixedly arranged on the second shaft, and a passive indentation roller which rotates along with the fourth shaft is fixedly arranged on the fourth shaft; the setting positions of the driving roller and the driven indentation roller correspond to the lugs on the pole piece, the roller surface of the driven indentation roller or the driving roller is provided with protruding embossing capable of embossing the lugs, and the roller surfaces of the driving roller and the driven indentation roller are matched to embossing the lugs. But the above scheme is complicated in structure.

The utility model patent of patent document CN212136624U discloses a compression roller device for lithium battery lugs, which comprises a supporting frame and a roller, a plurality of round angle bulges are uniformly distributed on the periphery of the roller, the supporting frame comprises a cross beam and upright posts, the upright posts are provided with two, are respectively and fixedly connected with two ends of the cross beam and are vertical to the cross beam, an upper roller and a lower roller are fixedly arranged between the upright posts, the upper roller and the lower roller are horizontally arranged, the roller comprises an upper roller and a lower roller, the surface of the upper roller is provided with a bearing, the upper roller is rotationally connected with the upper roller through the bearing, the surface of the lower roller is provided with the bearing, the lower roller is rotationally connected with the lower roller through the bearing, and the bulges of the upper roller and the lower roller are correspondingly arranged on the upper side and the lower side of the same position of the lug. However, the above scheme is easy to cause wavy edges of the foil and is unfavorable for cutting.

The utility model patent with patent document CN208753419U discloses a battery lug embossing roller, which 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. However, the above scheme is easy to cause wavy edges of the foil and is unfavorable for cutting.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a tab embossing device.

The lug embossing device comprises an embossing roller, wherein one or more strip-shaped reinforcing ribs and a plurality of uniformly arranged dot-shaped reinforcing ribs are distributed on the periphery of the embossing roller, and the periphery of the embossing roller is fully covered by the strip-shaped reinforcing ribs and the dot-shaped reinforcing ribs.

Preferably, the embossing drum is annular.

Preferably, each strip-shaped reinforcing rib is connected end to end.

Preferably, each of the bar-shaped reinforcing ribs is formed around one circumference in a wave shape along the circumferential direction of the embossing drum.

Preferably, each of the bar-shaped reinforcing ribs includes a plurality of linear reinforcing ribs, and two adjacent linear reinforcing ribs are integrally connected along the circumferential direction of the embossing drum. In particular, two adjacent linear reinforcing ribs here refer to two of the same bar-shaped reinforcing ribs.

Preferably, two straight reinforcing bars adjacent along the circumference of the embossing drum are in a V-shaped or inverted V-shaped structure.

Preferably, the two adjacent straight-line reinforcing ribs are in arc transition connection.

Preferably, the straight reinforcing ribs are arranged at an included angle with the projection of the upper surface or the lower surface of the embossing roller along the radial direction of the embossing roller, and the included angle is 30-40 degrees.

Preferably, the thickness of the bar-shaped reinforcing ribs is the same as that of the dot-shaped reinforcing ribs.

Preferably, the width of the straight reinforcing ribs is 2-3mm.

Preferably, the embossing drum has a height of 40-50cm.

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

1. the utility model has reasonable structure, ingenious design and lower cost.

2. The utility model solves the technical problems of poor expansion caused by off-couch and embossing of the pole lugs and foot tilting of the pole lugs by combining the structure of the strip-shaped reinforcing ribs on the basis of the traditional dot-shaped reinforcing ribs.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

fig. 1 is a plan view of a tab embossing device of example 1.

Fig. 2 is a schematic structural view of a tab embossing device in embodiment 1.

Fig. 3 is a front structural view of the tab embossing device of embodiment 1.

Fig. 4 is a front structural view of the tab embossing device of embodiment 2.

The figure shows:

embossing drum 1

Bar-shaped reinforcing rib 2

Straight reinforcing rib 201

Point-like reinforcing rib 3

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

As shown in fig. 1 and 2, the tab embossing device provided by the utility model comprises an embossing roller 1, wherein one or more strip-shaped reinforcing ribs 2 and a plurality of uniformly arranged point-shaped reinforcing ribs 3 are distributed on the periphery of the embossing roller 1, and the strip-shaped reinforcing ribs 2 and the point-shaped reinforcing ribs 3 are distributed on the periphery of the embossing roller 1. The embossing drum 1 is ring-shaped. The bar-shaped reinforcing bars 2 are formed around one circumference in a wave shape along the circumferential direction of the embossing drum 1. The strip-shaped reinforcing ribs 2 are connected end to end. The utility model solves the technical problems of poor expansion caused by off-couch and embossing of the pole lugs and foot tilting of the pole lugs by combining the structure of the strip-shaped reinforcing ribs on the basis of the traditional dot-shaped reinforcing ribs. A more detailed description is given below:

example 1:

the lug embossing device comprises an embossing roller 1, wherein the embossing roller 1 is annular, the outer side of the embossing roller 1 is a rolling surface and comprises a strip-shaped reinforcing rib 2 and a plurality of dot-shaped reinforcing ribs 3, the inner side of the embossing roller 1 is of a hollow structure, and the embossing roller 1 is convenient to install on a rotating shaft. Furthermore, fixing parts may be provided at both upper and lower sides of the embossing drum 1, by which the embossing drum is mounted on the rotating shaft, where the embossing drum is not unfolded.

As a modification, the embossing cylinder 1 may be provided in a polygonal cylindrical structure, and a flat surface is used for the pressing roller. For example, patent document CN210182473U discloses a tab roll suitable for electrode sheet, and a roll structure of regular hexagonal body is adopted.

It should be noted that if the regular polygon structure is adopted, each tab needs to be ensured to pass through one side surface of the column body through calculation and arrangement, so that the tab is prevented from being bent due to the fact that the tab passes through a side edge between two side surfaces.

In more detail, if the embossing roller 1 with the polygonal cylinder structure is adopted, the side edges between the two side surfaces can be changed into an arc structure, so that the side edges can be prevented from causing the indentation perpendicular to the length direction of the pole piece main body 1 on the pole piece main body 1.

In some embodiments, the bar-shaped reinforcing ribs 2 are provided on the embossing drum 1, and the bar-shaped reinforcing ribs 2 are formed around one circumference in a wave shape along the circumferential direction of the embossing drum 1, end to end. The wave crests of the bar-shaped reinforcing ribs 2 are close to the upper surface of the embossing roller 1, and the wave troughs of the bar-shaped reinforcing ribs 2 are close to the lower surface of the embossing roller 1, so that the side surface of the whole embossing roller 1 is maximally covered. Further preferably, the uppermost point-like reinforcing rib 3 is flush with the crest of the bar-like reinforcing rib 2, and the lowermost point-like reinforcing rib 3 is flush with the trough of the bar-like reinforcing rib 2.

It should be noted that the bar-shaped reinforcing ribs 2 may be M-shaped; or in a sine and cosine shape similar to the wave shape.

In some embodiments, the bar-shaped reinforcing bars 2 include a plurality of straight reinforcing bars 201, and two adjacent straight reinforcing bars 201 in the circumferential direction of the embossing drum 1 are integrally connected. In particular, the straight bead 201 means that the projections of its two opposite sides in the circumferential direction of the embossing cylinder in the radial direction of the embossing cylinder 1 are straight. And, when it is noted, since the linear stiffener 201 is provided on the embossing drum 1, the linear stiffener 201 is also attached to the surface of the embossing drum 1 in an arc shape.

As a modification, the projections of the two opposite sides of the linear stiffener 201 along the circumferential direction of the embossing cylinder along the radial direction of the embossing cylinder 1 may be arc lines, for example, the strip-shaped stiffener 2 having sine and cosine is provided, and the projection of the linear stiffener 201 is represented as arc lines.

In some embodiments, two adjacent linear stiffeners 201 along the circumference of the embossing drum 1 have a V-shaped or inverted V-shaped structure, and preferably, the circular arc between the adjacent two linear stiffeners 201 is smoothly transited.

In some embodiments, the linear stiffener 201 is disposed obliquely on the periphery of the embossing drum 1, i.e. the linear stiffener 201 is disposed at an angle to the projection of the upper or lower surface of the embossing drum 1 in the radial direction of the embossing drum, such as angle α shown in fig. 3, which is preferably 30-40 degrees. The reason for selecting the included angle range is as follows: too small an angle with the upper or lower surface of the embossing drum 1 can cause dense straight impressions leading to overextended wavy edges, thus leading to poor foil stretching; and the angle between the embossing drum 1 and the upper surface or the lower surface is too large to achieve an effective supporting effect.

In some embodiments, as shown in fig. 3, the width d of the linear stiffener 201 disposed in the circumferential direction of the embossing drum 1 is the same, and the width is preferably 2-3mm. The width of the linear stiffener 201 refers to the distance between two opposite sides of the linear stiffener 201 along the circumference of the embossing cylinder.

In some embodiments, the spot-like reinforcing bars 3 are distributed at the rest of the outer circumferential surface of the embossing drum 1. The dot-shaped reinforcing ribs 3 are uniformly distributed at equal intervals in an array mode, and the array direction of the dot-shaped reinforcing ribs 3 can be horizontal or vertical or inclined.

In some embodiments, the dot-shaped reinforcing ribs 3 are arranged in a semicircle shape, and the shape of the dot-shaped reinforcing ribs can be a boss structure with a hemispherical top part cut off into a sphere. The tangential plane of the embossing drum 1 is perpendicular to the radial direction of the spot-like reinforcing bars 3. Or the tangent plane is also an arc surface, so that the contact with the lug is ensured.

In some embodiments, the thicknesses of the strip-shaped reinforcing ribs 2 and the dot-shaped reinforcing ribs 3 are the same, so that the strip-shaped reinforcing ribs 2 and the dot-shaped reinforcing ribs 3 can be contacted with the tab at the same time in the rolling process of the embossing drum 1. The thickness of the bar-shaped reinforcing ribs 2 or the dot-shaped reinforcing ribs 3 refers to the distance from one end of the bar-shaped reinforcing ribs 2 or the dot-shaped reinforcing ribs 3, which is far away from the embossing drum 1, to the circumferential side of the embossing drum 1.

In some embodiments, the height of the embossing drum 1 is preferably set to 40-50cm.

Example 2:

the lug embossing device comprises an embossing roller 1, wherein the embossing roller 1 is annular, the outer side of the embossing roller 1 is a rolling surface, the embossing roller comprises 2 strip-shaped reinforcing ribs 2 and a plurality of dot-shaped reinforcing ribs 3, the inner side of the embossing roller 1 is of a hollow structure, and the embossing roller 1 is convenient to install on a rotating shaft.

The strip-shaped reinforcing ribs 2 are arranged on the embossing roller 1, the strip-shaped reinforcing ribs 2 are connected end to end, and the strip-shaped reinforcing ribs are formed around a circle in a wave shape along the circumferential direction of the embossing roller 1. The wave crests of the bar-shaped reinforcing ribs 2 are close to the upper surface of the embossing roller 1, and the wave troughs of the bar-shaped reinforcing ribs 2 are close to the lower surface of the embossing roller 1, so that the side surface of the whole embossing roller 1 is maximally covered.

The difference from embodiment 1 is that, as shown in fig. 2, the bar-shaped reinforcing bars 2 are provided in two, and the two bar-shaped reinforcing bars 2 are alternately distributed on the circumferential side surface of the embossing drum 1.

In some embodiments, the two bar-shaped reinforcing bars 2 are preferably distributed mirror-symmetrically with respect to a horizontal plane in which the axial center of the embossing drum 1 is located.

In some embodiments, the bar-shaped reinforcing bars 2 may be provided in 3 bars, 4 bars, or the like. The considerations include the size, dimensions, height of the embossing drum 1, thickness of the bar-shaped reinforcing bars 2, etc., as the case may be.

The shape setting of the embossing drum 1, the structure of the spot-like reinforcing ribs 3, the arrangement of the bar-like reinforcing ribs 2 and the spot-like reinforcing ribs 3 in this embodiment may be the same as in embodiment 1, and are not developed here.

According to the utility model, the strip-shaped reinforcing ribs 2 are arranged on the embossing roller 1 to play a supporting role, the dot-shaped reinforcing ribs 3 are filled in the rest part of the embossing roller 1, so that the defect that no stress point exists in the middle part is overcome, and the pole ear parts tend to be flat by using single-side reverse indentation through the strip-shaped reinforcing ribs 2 and the dot-shaped reinforcing ribs 3, so that the phenomena of off-couch or turning over are avoided.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims

1. The tab embossing device is characterized by comprising an embossing roller, wherein one or more strip-shaped reinforcing ribs and a plurality of uniformly arranged point-shaped reinforcing ribs are distributed on the periphery of the embossing roller, and the periphery of the embossing roller is fully covered by the strip-shaped reinforcing ribs and the point-shaped reinforcing ribs.

2. The tab embossing device of claim 1 wherein the embossing drum is annular.

3. The tab embossing device of claim 1 wherein each of the bar-shaped reinforcing bars are connected end to end.

4. A tab embossing apparatus as set forth in claim 3, wherein each of the bar-shaped reinforcing ribs is formed around one circumference in a wave form along the circumferential direction of the embossing drum.

5. The tab embossing apparatus as set forth in claim 1, wherein each of the bar-shaped reinforcing ribs comprises a plurality of straight reinforcing ribs integrally connected between two adjacent straight reinforcing ribs along the circumferential direction of the embossing drum.

6. The tab embossing apparatus as set forth in claim 5, wherein two straight reinforcing bars adjacent to each other in the circumferential direction of the embossing drum have a V-shaped or inverted V-shaped structure.

7. The tab embossing device of claim 6 wherein the arcuate transition between two adjacent linear ribs.

8. The tab embossing device of claim 6, wherein the linear rib is disposed at an angle of 30-40 degrees from a projection of the upper or lower surface of the embossing drum in a radial direction of the embossing drum.

9. The tab embossing device of claim 1 wherein the bar-shaped reinforcing ribs and the dot-shaped reinforcing ribs have the same thickness.

10. The tab embossing device of claim 5 wherein the linear stiffener has a width of 2-3mm.