CN218123442U

CN218123442U - Lithium ion battery pole piece dividing cutter

Info

Publication number: CN218123442U
Application number: CN202221543961.3U
Authority: CN
Inventors: 杨锐泽; 杨浩; 黄相博
Original assignee: Yueyang Yaoning New Energy Technology Co Ltd
Current assignee: Yueyang Yaoning New Energy Technology Co Ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-12-23
Anticipated expiration: 2032-06-20

Abstract

The utility model discloses a divide cutter on lithium ion battery pole piece, divide cutter blade and divide cutter blade down including last. The upper slitting knife is an oblique angle knife, an oblique angle gap is arranged at the meshing position of the upper slitting knife and the lower slitting knife, and an alpha angle is arranged at the tail end of the upper slitting knife. The utility model discloses divide the cutter to cut on the lithium ion battery pole piece and the current device different that cuts, the utility model discloses divide the cutter to reduce the blade angle of going up the branch cutter and reached the purpose that reduces the friction width of cutting the pole piece, also reduce simultaneously and go up the branch cutter and divide extrusion force between the cutter down for the pole piece incision is comparatively neat when cutting lithium ion battery pole piece, and the condition that the burr produced has obvious reduction.

Description

Lithium ion battery pole piece dividing cutter

Technical Field

The utility model relates to a lithium ion battery production facility technical field especially relates to a divide cutter on lithium ion battery pole piece.

Background

Lithium batteries are widely used in various electronic products, and have good application prospects in future electric vehicles. The process technology of the lithium ion battery is very strict and complex, the pole piece is the core of the lithium battery, the charge and discharge reaction of the battery is mainly carried out by depending on the active substance and the electrolyte on the substrate, and the pole piece directly influences the key factor of the performance of the storage battery in the production process of the lithium battery. When the pole piece is prepared, a special solvent and an adhesive are respectively mixed with active substances of a positive electrode and a negative electrode, the mixture is stirred and uniformly mixed to prepare positive and negative electrode slurry materials, the prepared slurry is uniformly coated on the surface of a metal foil, and the surface of the metal foil is dried and rolled to prepare the pole piece.

In the prior art, the lithium ion battery pole piece slitting device is generally an upper blade with a cutting edge angle and a lower blade perpendicular to 90 degrees, but the cutting edge angle of the upper blade is relatively large. The problem exists like this is that both sides are because of the different and existence of upper slitter blade edge angle of tension to the pole piece extrusion after cutting causes the influence, causes the pole piece incision orderly inadequately.

For example, chinese utility model patent with an authorization publication number of CN207883803 discloses a lithium ion battery pole piece slitting device, which comprises a frame and an upper cutter shaft and a lower cutter shaft which are horizontally arranged on the frame. Above-mentioned technical scheme goes up the cutter point that divides cutter angle great relatively and go up the blade and directly the laminating is in the same place with the bottom knife, thereby can lead to the extrusion force between top and bottom knife too big the not good condition of pole piece effect appears cutting when the pole piece of cutting.

Disclosure of Invention

The utility model discloses there is the technical problem of falling powder, burr mainly to solve original lithium ion and cut the device when cutting thicker pole piece, provides a lithium ion battery pole piece divides the cutter, through the angle that reduces the upper minute cutter alpha angle and increase the upper minute cutter and the oblique angle clearance of dividing cutter meshing department down for the upper minute cutter is less with the extrusion force and the friction width of dividing between the cutter down when cutting lithium ion battery pole piece.

The above technical problem of the present invention can be solved by the following technical solutions: the utility model discloses an on divide the cutter, divide the cutter down, on divide the cutter to be the bevel sword, on divide the cutter to have the oblique angle clearance with dividing the cutter down, on divide the cutter end to be equipped with the alpha angle, the existence in oblique angle clearance and the reducing of alpha angle fully solve lithium ion battery pole piece and divide the powder burr problem that falls that the cutter produced when cutting thick battery pole piece.

Preferably, the upper slitting knife comprises an upper slitting knife back face, an upper slitting knife vertical knife face and an upper slitting knife edge face 1.3, and the upper slitting knife and the lower slitting knife act together to realize slitting of the lithium ion battery pole piece.

Preferably, the back surface of the upper slitting knife and the cutting edge surface of the upper slitting knife are clamped to form an alpha angle, and the extrusion force born by the slitting knife during pole piece slitting can be changed by adjusting the angle of the alpha angle.

As preferred, go up the angle of the terminal alpha angle of minute cutter and be 16 ~ 30 degrees, the angle of the ordinary alpha angle of minute cutter is generally 26 degrees or 30 degrees, the utility model discloses a minute cutter can be according to actual conditions adjustment minute cutter's alpha angle and reach better effect of cutting.

Preferably, the lower slitting blade comprises a lower slitting cutter vertical blade surface and a lower slitting cutter horizontal blade surface, the lower slitting cutter blade is a 90-degree right-angle cutter, and the lower slitting cutter is matched with the upper slitting cutter to perform slitting work and simultaneously needs to support the lithium ion battery pole piece.

Preferably, the distance between the cutting edge surface of the upper slitting knife and the vertical knife surface of the lower slitting knife is an oblique angle gap L, the range of the oblique angle gap L is 2-9 mu m, and an oblique angle gap is additionally arranged between the upper slitting knife and the lower slitting knife so as to reduce the extrusion force borne by the blades when the lithium ion battery pole pieces are slit to a certain extent.

Preferably, the cutting edge surface of the upper slitting knife and the vertical knife surface of the lower slitting knife form a beta angle, the angle range of the beta angle is 1-3 degrees, the angle of the beta angle is closely related to the bevel gap, and the larger the angle of the beta angle is, the larger the bevel gap is.

Preferably, the upper and lower slitting knives are both circular-sheet-shaped blades, and the slitting effect of the slitting knife of the circular-sheet-shaped blades is better in the slitting process of the lithium ion battery pole piece.

The utility model has the advantages that: 1. the friction width between the upper slitting knife and the pole piece is small, and when the thickness of the pole piece is thickened, the friction width is still small, and the powder falling effect can still be kept;

2. the extrusion force between the upper slitting knife and the lower slitting knife is small, and when the thickness of the pole piece is thickened, the extrusion force is still small, and the effects of no burr generation and no powder falling can be still kept.

Drawings

Fig. 1 is a front view of the cutting knife on the lithium ion battery electrode plate of the present invention.

Fig. 2 is a detailed connection diagram of the upper slitting knife and the lower slitting knife of the utility model.

Fig. 3 is a side view of the cutting knife on the lithium ion battery electrode plate of the present invention.

In the figure, an upper cutting knife 1, a lower cutting knife 2, an upper cutting knife back 1.1, an upper cutting knife vertical knife face 1.2, an upper cutting knife edge face 1.3, a lower cutting knife vertical knife face 2.1 and a lower cutting knife horizontal knife face 2.2 are arranged.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

The embodiment is as follows: the lithium ion battery pole piece dividing and cutting knife of the embodiment comprises an upper dividing and cutting knife 1 and a lower dividing and cutting knife 2 as shown in fig. 1. The upper slitting knife 1 and the lower slitting knife 2 are meshed with each other to realize slitting of the lithium ion battery pole piece.

As shown in fig. 2, preferably, the back surface 1.1 of the upper slitting knife 1 and the edge surface 1.3 of the upper slitting knife form an angle α, and the size of the extrusion force borne by the slitting knife during slitting of the pole pieces can be changed by adjusting the angle α. Go up the angle of the terminal alpha angle of minute cutter 1 and be 16 ~ 30 degrees, the conventional alpha angle of minute cutter generally is 26 degrees or 30 degrees, the utility model discloses a minute cutter can be according to actual conditions adjustment minute cutter's alpha angle reach better effect of cutting. The best blade angle that divides cutter 1 on the utility model discloses the device is 16 degrees, goes up reducing of the blade angle that divides cutter 1 and can reduce and go up dividing cutter 1 and pole piece friction width, and the reduction of blade angle makes on divide cutter 1 also corresponding reduction in the atress on the horizontal direction simultaneously, and then burr when making the cutting pole piece, fall the powder condition and reduce and appear.

As shown in fig. 2, the lower slitting knife includes a lower slitting knife vertical knife face 2.1 and a lower slitting knife horizontal knife face 2.2, the blade of the lower slitting knife 2 is a 90-degree right-angle knife, and the lower slitting knife 2 is matched with the upper slitting knife 1 to perform slitting work and simultaneously needs to support a lithium ion battery pole piece. During cutting, the pole piece is pressed on the blade of the lower slitting knife 1, the blade of the lower slitting knife 2 bears larger gravity and the pressure of the upper blade on the pole piece during slitting, the blade of the lower slitting knife 2 is easy to damage, and the blade of the lower slitting knife 2 uses a 90-degree right-angle knife, so that the service life of the knife is longer, and the knife is more durable.

As shown in figure 2, the distance between the cutting edge face 1.3 of the upper slitting cutter and the vertical cutter face 2.1 of the lower slitting cutter of the upper slitting cutter is an oblique angle gap L, the range of the oblique angle gap L is 2-9 mu m, and an oblique angle gap is additionally arranged between the upper slitting cutter 1 and the lower slitting cutter 2, so that the extrusion force borne by the cutter blade during slitting of the lithium ion battery pole piece is reduced to a certain extent, and the quality problems of powder falling and burr of a slit edge are solved.

As shown in fig. 2, the cutting edge surface 1.3 of the upper slitting knife 1 and the lower slitting knife perpendicular knife surface 2.1 of the lower slitting knife 2 are clamped to form a beta angle, the angle range of the beta angle is 1-3 degrees, the angle of the beta angle is closely related to the bevel gap, and the larger the angle of the beta angle is, the larger the bevel gap is. The angle of the beta angle can be adjusted to directly influence the bevel gap, and further influence the slitting effect of the slitting knife.

As shown in fig. 3, the upper slitting knife 1 and the lower slitting knife 2 are both circular sheet type slitting knives, and when the area of the daily lithium ion battery pole piece to be slit is very large and the size of the required area is different, the pole piece needs to be slit in order to meet the requirements of the lithium ion battery pole pieces with different specifications. At present, the lithium ion battery pole piece dividing cutter mainly comprises a roller cutter and a wafer dividing cutter, wherein a blade of the wafer dividing cutter is in a wafer shape and has a certain cutting edge angle, and cutting is carried out through an upper blade and a lower blade which are matched with each other.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms upper slitting knife, lower slitting knife, friction width, bevel gap, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a lithium ion battery pole piece divides cutter, its characterized in that includes and goes up branch cutter (1) and divides cutter (2) down, go up the branch cutter and be bevel angle sword, go up the meshing department that divides cutter (1) and divide cutter (2) down and be equipped with the oblique angle clearance, go up the branch cutter end and be equipped with alpha angle.

2. The lithium ion battery pole piece upper slitting knife according to claim 1, wherein the upper slitting knife (1) comprises an upper slitting knife back surface (1.1), an upper slitting knife vertical knife surface (1.2) and an upper slitting knife edge surface (1.3), and the upper slitting knife vertical knife surface (1.2) is meshed with the lower slitting knife vertical knife surface (2.1).

3. The cutting knife for the lithium ion battery pole piece according to claim 2, wherein the back surface (1.1) of the upper cutting knife and the edge surface (1.3) of the upper cutting knife are clamped to form an angle α.

4. The cutting knife for the lithium ion battery pole piece according to claim 3, wherein the angle alpha of the tail end of the upper cutting knife (1) is 16-30 degrees.

5. The lithium ion battery pole piece upper slitting knife according to claim 1, characterized in that, the lower slitting knife (2) comprises a lower slitting knife vertical knife surface (2.1) and a lower slitting knife horizontal knife surface (2.2), and the lower slitting knife (2) blade is a 90-degree right-angle knife.

6. The lithium ion battery pole piece upper slitting knife according to claim 1 or 5, characterized in that the distance between the upper slitting knife edge surface (1.3) and the lower slitting knife vertical knife surface (2.1) of the upper slitting knife (1) is a bevel gap L, and the bevel gap L ranges from 2 to 9 μm.

7. The lithium ion battery pole piece upper slitting knife according to claim 5, characterized in that the upper slitting knife edge surface (1.3) of the upper slitting knife (1) and the lower slitting knife vertical knife surface (2.1) of the lower slitting knife (2) form a beta angle.

8. The lithium ion battery pole piece slitting knife according to claim 7, wherein the angle of the β angle is in a range of 1 to 3 degrees.