CN214604810U

CN214604810U - Pole piece cutting knife group

Info

Publication number: CN214604810U
Application number: CN202023345991.7U
Authority: CN
Inventors: 钱涛
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Tongcheng Guoxuan New Energy Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-05
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a pole piece cutting knife tackle, it includes: a movable cutter and two fixed cutters, fixed cutter with movable cutter is located the both sides of treating the sanction pole piece respectively, just fixed cutter's cutting edge sets up relatively, its cutting edge with movable cutter's cutting edge meshing, this movable cutter keeps away from or is close to fixed cutter to realize deciding and pole piece V angle or fillet one shot forming of pole piece, can show the uniformity that improves the pole piece, then improve the uniformity of lamination back electricity core.

Description

Pole piece cutting knife group

Technical Field

The utility model relates to a battery production technical field, concretely relates to pole piece cutting knife tackle.

Background

With the rapid development of lithium ion batteries, related production equipment, such as lamination equipment, is also rapidly developed.

The structural design of lamination electricity core is longer and longer, especially more outstanding with soft packet of lamination battery, and wherein soft packet of battery requires the four corners of pole piece monolithic to be V angle or fillet shape in the aspect of the electricity core to have enough space between electricity core four corners and the plastic-aluminum membrane, protection plastic-aluminum membrane.

At present, the long pole piece is manufactured by cutting a V-shaped corner or a fillet and cutting the pole piece separately, but the V/fillet shape of four corners of the pole piece after being cut is not consistent by the method, so that the attractiveness of a battery core and the performance of the battery are greatly influenced.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses it is necessary to provide a pole piece cutting knife tackle, and this pole piece cutting knife tackle can realize that the pole piece is decided and is cut one shot forming with V angle or fillet, guarantees that the shape of four corners after the pole piece cuts is identical completely, is showing the uniformity requirement that improves pole piece size shape for electric core uniformity after the lamination is better.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a pole piece cutting knife tackle, it includes:

the movable cutter comprises a first main cutter body, a first end part and a second end part, wherein the first end part and the second end part are oppositely arranged along the length direction of the first main cutter body; the cutting edge of the movable cutter comprises a first short cutting edge arranged at the inner chamfer, a first long cutting edge and a second long cutting edge which are oppositely arranged along the width direction of the first main cutter body, and the end parts of the first long cutting edge and the second long cutting edge are respectively connected with the first short cutting edge;

the fixed cutters and the movable cutters are respectively positioned on two sides of the pole piece to be cut, cutting edges of the fixed cutters are arranged oppositely, and the cutting edges of the fixed cutters are meshed with the cutting edges of the movable cutters.

Further, the inner chamfer is a straight inner chamfer.

Further, the inner chamfer is an arc inner chamfer.

Further, the surfaces of the first long cutting edge, the second long cutting edge and the first short cutting edge are plated with tungsten steel or hard alloy steel.

Further, the fixed cutter includes: the second main cutter body, the second main cutter body includes along the relative first side and the second side that sets up of its width direction, the both ends on first side and second side are outer chamfer, outer chamfer with interior chamfer meshing is tangent, first side is equipped with the long cutting edge of third, outer chamfer department is equipped with the short cutting edge of second, the both ends of the long cutting edge of third respectively with the short cutting edge of second is connected.

Preferably, the surfaces of the third long cutting edge and the second short cutting edge are plated with tungsten steel or hard alloy steel.

Further, the distance between the third long cutting edges of the fixed cutters is equal to the distance between the first long cutting edge and the second long cutting edge of the movable cutter.

Further, the distance between the first long cutting edge and the second long cutting edge of the movable cutter is 2 mm.

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

this pole piece cuts knife tackle can guarantee deciding of pole piece and the one shot forming that V angle or fillet cut, and guarantees that the shape of four corners after the pole piece cuts is identical completely, compares in the mode that the pole piece was decided after cutting earlier in current corner, and the uniformity of pole piece size, shape has very big promotion, and the electric core uniformity behind the lamination is also better.

Drawings

Fig. 1 is a schematic structural view of a movable cutter 10 according to a preferred embodiment of the present invention;

fig. 2 is a schematic structural view of a fixed cutter 20 according to a preferred embodiment of the present invention;

FIG. 3 is a schematic structural view of the working state of the middle pole piece cutting knife set of the present invention;

FIG. 4 is a schematic view of the V-angle pole piece 32 shown in FIG. 3;

fig. 5 is a schematic structural diagram of a rounded pole piece 31 obtained in another preferred embodiment of the present invention.

In the figure: the movable cutter 10, the first main cutter body 101, the first long cutting edge 1011, the second long cutting edge 1012, the first end 102, the second end 103, and the first short cutting edge 104;

a fixed cutter 20, a third long cutting edge 201, a second short cutting edge 202;

pole piece 30, fillet pole piece 31, V angle pole piece 32.

Detailed Description

The following will combine with the drawings of the specification to further explain the pole piece cutting knife assembly provided by the present invention in detail.

It will be understood that when an element is referred to as being "secured to," "disposed on," or "mounted to" another element, it can be directly on the other element or be indirectly on the other element. One element is said to be "connected to" another element, and it can be directly connected to the other element or be indirectly connected to the other element. In addition, attachment is generally referred to as attachment, where attachment may be by any means conventional in the art, such as "threading," "riveting," "welding," or the like.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the specification and are used in an illustrative or positional relationship based on the orientation shown in the drawings and are used for convenience in describing embodiments of the invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed or operated in a particular orientation, and thus should not be construed as limiting the invention.

The embodiment of the invention discloses a pole piece cutting knife group, which consists of a movable cutter 10 and two fixed cutters 20, wherein the movable cutter 10 and the fixed cutters 20 are respectively arranged at two sides of a pole piece 30, the positions of the fixed cutters 20 are fixed, and the movable cutter 10 moves to be far away from or close to the fixed cutters 20, so that the cutting of the pole piece 30 and the forming of a V-shaped angle or a round angle of the pole piece are realized.

Specifically, as shown in fig. 1, the movable cutter 10 includes a first main cutter body 101, a first end 102 and a second end 103, the first end 102 and the second end 103 are oppositely disposed along a length direction of the first main cutter body 101, and the first main cutter body 101, the first end 102 and the second end 103 respectively form four inner chamfers with the same angle, in other words, the first end 102 and the second end 103 are oppositely disposed and respectively fixedly connected to two ends of the first main cutter body 101, and the first main cutter body 101 is located on a median line of the first end 102 and the second end 103, and the four inner chamfers are stacked on each other, as shown in fig. 1, in this embodiment, the first main cutter body 101 is a rectangular parallelepiped structure. Further, referring to fig. 1, a first long cutting edge 1011 and a second long cutting edge 1012 are disposed on the first main cutter body 101, the first long cutting edge 1011 and the second long cutting edge 1012 are disposed opposite to each other along the width direction of the first main cutter body 101, and a first short cutting edge 104 is disposed at the inner chamfer, as can be seen from fig. 1, the end portions of the first long cutting edge 1011 and the second long cutting edge 1012 are respectively connected to the first short cutting edge 104. In addition, the inner chamfer is designed according to the first short cutting edge 104, specifically, when the pole piece needs to be cut into a V-angle, the inner chamfer is a linear inner chamfer, and the first short cutting edge 104 is a straight line; when the pole pieces need to be cut into round corners, the inner chamfer is an arc inner chamfer, and the first short cutting edge 104 is an arc. Further, the surfaces of the first long cutting edge 1011, the second long cutting edge 1012, and the first short cutting edge 104 are plated with tungsten steel or hard alloy steel.

In a further scheme, the two fixed cutters 20 and the movable cutter 10 are respectively positioned at two sides of the pole piece 30, and the cutting edges of the fixed cutters 20 are meshed with the cutting edges of the movable cutter 10. Specifically, as shown in fig. 2, the fixed cutter 20 includes a second main cutter body, which is also a rectangular parallelepiped structure in this embodiment, and includes a first side and a second side oppositely disposed along the width direction thereof, and two ends of the first side and the second side are two outer chamfers located on the same side, and the outer chamfers are engaged with the inner chamfers of the movable cutter 10 in a tangent manner. Further, with continued reference to fig. 2, a third long cutting edge 201 is provided at the first side edge, and the third long cutting edge 201 is tangent to the first long cutting edge 1011 or the second long cutting edge 1012, it being understood that the third long cutting edge 201 is the same length as the first long cutting edge 1011 or the second long cutting edge 1012. A second short cutting edge 202 is provided at the outer chamfer of the fixed cutter 20, and the second short cutting edge 202 is connected to the third long cutting edge 201. Further, with reference to fig. 2, the cutting edges of the two fixed cutters 20 are disposed opposite to each other, and the distance between the third long cutting edges 201 is equal to the distance between the first long cutting edge 1011 and the second long cutting edge 1012. And as with the movable cutter 10, the surfaces of the third long cutting edge 201 and the second short cutting edge 202 are plated with tungsten steel or hard alloy steel.

When the pole piece is cut, as shown in fig. 3, the movable cutter 10 and the fixed cutter 20 are respectively disposed at two sides of the pole piece 30, and the movable cutter 10 is located between the fixed cutters 20, wherein the connection between the movable cutter 10 and the fixed cutter 20 and the pole piece cutting device is not particularly limited, and is a conventional connection manner in the art, and is not particularly limited here. The distance between the third long cutting edges 201 of the two fixed cutters 20 is equal to the distance between the first long cutting edge 1011 and the second long cutting edge 1012 of the movable cutter 10, and in order to avoid the generation of the scrap as much as possible, the distance between the third long cutting edges 201 of the two fixed cutters 20 is 2mm in the present embodiment. When the pole piece 30 reaches the cutting position, the movable cutter 10 moves toward the fixed cutter 20, and when the cutting edge of the movable cutter 10 engages with the cutting edge of the fixed cutter 20, the pole piece 30 is cut, and the first short cutting edge 104 engages with the second short cutting edge 202 to form a V-angle. After the pole piece 30 is cut off, the movable cutter 10 is far away from the fixed cutter 20, after the pole piece 30 is drawn to a specified width, the movable cutter 10 is close to the fixed cutter 20 again, and the process is repeated. As shown in fig. 4, a V-angle pole piece 32 is cut from the pole piece cutter set of fig. 3. When the inner chamfer is a circular arc inner chamfer, the rounded pole piece 31 can be cut as shown in fig. 5, which will not be described in detail here.

Through this pole piece cutting knife tackle, can realize that the pole piece is decided and once forms with cutting of V angle or fillet, and the size of V angle or fillet is unanimous completely, produces few waste material when cutting simultaneously, and the width of waste material equals the interval between first long cutting edge 1011 and the long cutting edge 1012 of second, and this interval can be controlled for being enough little, and the waste material of production is few, and this pole piece cutting knife tackle can improve the uniformity of pole piece, then improves the uniformity of lamination back electric core.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A pole piece cutting knife group is characterized in that the pole piece cutting knife group comprises:

2. The pole piece cutter group of claim 1, wherein the internal chamfer is a straight internal chamfer.

3. The pole piece cutter group of claim 1, wherein the inner chamfer is a radiused inner chamfer.

4. The pole piece cutter group of claim 1, wherein the surfaces of the first long cutting edge, the second long cutting edge and the first short cutting edge are plated with tungsten steel or hard alloy steel.

5. The pole piece cutting knife assembly of claim 1, wherein the fixed knife comprises: the second main cutter body, the second main cutter body includes along the relative first side and the second side that sets up of its width direction, the both ends on first side and second side are outer chamfer, outer chamfer with interior chamfer meshing is tangent, first side is equipped with the long cutting edge of third, outer chamfer department is equipped with the short cutting edge of second, the both ends of the long cutting edge of third respectively with the short cutting edge of second is connected.

6. The pole piece cutter group of claim 5, wherein the surfaces of the third long cutting edge and the second short cutting edge are plated with tungsten steel or hard alloy steel.

7. The pole piece cutter assembly of any one of claims 1 to 6 wherein the distance between the third long cutting edges of the fixed cutters is equal to the distance between the first and second long cutting edges of the movable cutters.

8. The pole piece cutter assembly of claim 7 wherein the movable cutter has a first long cutting edge and a second long cutting edge spaced apart by a distance of 2 mm.