CN218857209U - Die cutting equipment and cutting die suitable for lithium ion battery pole piece - Google Patents
Die cutting equipment and cutting die suitable for lithium ion battery pole piece Download PDFInfo
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- CN218857209U CN218857209U CN202223349065.6U CN202223349065U CN218857209U CN 218857209 U CN218857209 U CN 218857209U CN 202223349065 U CN202223349065 U CN 202223349065U CN 218857209 U CN218857209 U CN 218857209U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a lithium ion battery preparation field discloses a be applicable to lithium ion battery pole piece cross cutting equipment and cutting die. The cutting die includes: the insulating substrate, the bottom surface of insulating substrate is provided with an at least cutting edge, each cutting edge encloses into a closed shape with the appearance assorted of pole piece, be in the closed shape and be the bottom surface blank area of insulating substrate outside the closed shape, the surface in bottom surface blank area is at same horizontal plane, the cutting edge is protruding in bottom surface blank area, be located the cutting edge enclose the length width and the area of at least one side of closed shape all be greater than the bottom surface blank area of closed shape is: and the prepressing area corresponds to the cutting edge. By applying the technical scheme, the die cutting quality is improved, the die cutting size consistency is improved, and the powder falling condition is improved.
Description
Technical Field
The utility model relates to a lithium ion battery preparation field especially relates to a lithium ion battery.
Background
Due to the characteristic of green energy, the new energy lithium battery is widely applied and is in an explosive growth stage at present. The pole piece is a core component of the lithium ion battery, and the pole piece is coated with slurry, dried and rolled to form a three-layer composite structure of a current collector and a double-sided coating. Then, the pole piece is cut according to the design structure and specification of the battery. The die punching is also called die cutting and is the main process for cutting the lithium ion battery pole piece at present.
The inventor discovers that the phenomena of pole piece powder falling and pole piece size abnormity easily occur in the pole piece die cutting process, and abnormal phenomena such as poor product pressure drop, uncontrollable production process and the like are caused in the research process of the invention.
Disclosure of Invention
An object of the embodiment of the utility model is to provide a cross cutting equipment and cutting die for lithium ion battery pole piece, use this technical scheme to be favorable to improving the cross cutting quality, improve cross cutting size uniformity and improve the powder falling condition.
The embodiment of the utility model provides a pair of cutting die suitable for lithium ion battery pole piece cross cutting, include: an insulating substrate is provided on the substrate,
the bottom surface of the insulating substrate is provided with a cutting edge which encloses a closed shape matched with the shape of the pole piece,
the inner part and the outer part of the closed shape are both the bottom surface blank area of the insulating substrate, the surface of the bottom surface blank area is on the same horizontal plane, the blade is protruded from the bottom surface blank area,
the length, the width and the area of at least one side of the closed shape surrounded by the cutting edges are all larger than the blank area of the bottom surface of the closed shape: and the prepressing area corresponds to the cutting edge.
Optionally, the insulating substrate is a rubber plate.
Optionally, the method further comprises: the foam layer is fixed on the surface of the bottom surface blank area, and the cutting edges are arranged between the foam layer on the bottom surface blank area in the closed pattern formed by the cutting edges at intervals and the foam layer on the bottom surface blank area outside the closed pattern formed by the cutting edges.
Optionally, in a natural state, the surface of the foam layer is higher than the blade edge; when pressed, the thickness of the foam layer is compressed and the blade is exposed.
Optionally, the pre-press has an area at least twice the closed shape to which the pre-press corresponds.
Optionally, at least two cutting edges are arranged on the bottom surface of the insulating substrate, each cutting edge encloses a closed shape matched with the shape of the pole piece, and the same side of each cutting edge is provided with the pre-pressing area.
Optionally, the pre-pressing area is located at a length edge side of the closed shape corresponding to the pre-pressing area.
Optionally, in a blank area of a bottom surface of the periphery of the closed shape surrounded by the cutting edges, the width of the pre-pressing area is the largest.
The embodiment of the utility model provides a pair of be applicable to lithium ion battery pole piece cross cutting equipment, include:
the pole piece conveying device is used for conveying pole pieces, enabling the pole pieces to be unfolded to pass through the die cutting platform, setting the conveying direction of the pole pieces to the die cutting platform to be from left to right,
the die cutting platform is used for supporting the pole piece;
the cutting die suitable for die cutting of the lithium ion battery pole piece is positioned above the die cutting platform,
and a prepressing area on the cutting die is positioned on the left side of the cutting edge corresponding to the prepressing area, when the pole piece is positioned on the die cutting platform, the cutting die descends and presses on the pole piece, the cutting edge cuts the right end area of the pole piece to obtain the pole piece with the shape consistent with the closed figure enclosed by the cutting edge, and the prepressing area of the cutting die presses on the surface of the left end area of the pole piece.
As can be seen from the above, with the die cutting device and the cutting die of the present embodiment, the pole piece conveying device conveys a long rolled pole piece from left to right, unreels the pole piece to the die cutting platform, stops conveying the pole piece when the area of the front end of the pole piece is just opposite to the lower part of the pre-pressing area of the rear end of the cutting die, clamps the pole piece to prohibit displacement, lowers the cutting die by the lifting mechanism, and presses the front end area of the pole piece by the pre-pressing area on the left side of the insulating substrate to unfold and flatten the pole piece area;
and (3) lifting the cutting die, further conveying the pole piece rightwards, stopping conveying the pole piece when the front end area of the unfolded and flattened pole piece is conveyed to the position right below the cutting edge, clamping the pole piece to enable the pole piece to be forbidden to move, and descending the cutting die, wherein at the moment:
the cutting edge of the cutting die acts on the unfolded and flattened front end area of the pole piece, the pole piece with the same closed shape enclosed by the cutting edge is die-cut in the front end area of the pole piece, and the die-cut pole piece is collected in a pole piece collecting device for the next working procedure; meanwhile, the prepressing area on the left side of the cutting edge presses the left side area of the pole piece on the die cutting platform of the pole piece to spread and flatten the pole piece so as to facilitate die cutting. Therefore, the area to be die-cut of the pole piece is respectively flattened before die cutting at each time, the unfolding flatness of the die-cut area is ensured, the die-cut size consistency of the pole piece is improved, the powder falling condition of a coating caused by die cutting of the pole piece is improved, and the quality of the pole piece is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute an undue limitation on the invention.
Fig. 1 is a schematic bottom structure view of a cutting die suitable for die cutting of lithium ion battery pole pieces according to an embodiment of the present invention;
fig. 2 is the embodiment of the utility model provides a side direction structure schematic diagram of cutting die suitable for lithium ion battery pole piece cross cutting.
1: an insulating substrate; 11: a pre-pressing area; 2: a blade; 3: and (5) soaking a cotton layer.
Description of the preferred embodiment
The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided to explain the invention, but not to limit the invention.
Examples
See fig. 1-2.
The embodiment provides a cutting die suitable for die cutting of lithium ion battery pole pieces, which mainly comprises an insulating substrate 1, wherein the insulating substrate 1 can be but is not limited to a solid rubber plate with certain rigidity.
The bottom surface of the insulating substrate 1 is fixedly embedded with a blade 2, and the blade 2 encloses a pole piece in a shape of a closed shape. The bottom surface blank area of the insulating substrate 1 is formed in the closed shape and outside the closed shape, and the surfaces of the bottom surface blank area are all on the same horizontal plane, namely the bottom surface of the insulating substrate 1 is a flat horizontal plane. The cutting edge 2 is protruded from the surface of the blank area on the bottom surface, and when the cutting die is dropped on the pole piece, the protruded cutting edge 2 acts on the pole piece to cut the pole piece with the same shape as the closed shape.
Referring to fig. 1, in the present embodiment, the length, the width and the area of the bottom surface blank space located on at least one side of the closed shape surrounded by the cutting edges 2 are all larger than the length, the width and the area of the closed shape. For convenience of description, the length, width and area of one side of the closed shape surrounded by the cutting edges 2 are greater than the blank area of the bottom surface of the closed shape: the cutting edge 2 corresponds to a pre-stressed zone 11. And a prepressing area 11 corresponding to each blade 2 is arranged on one outer side of each blade 2, and the length, the width and the area of each prepressing area 11 are all larger than the closed pattern defined by the blades 2.
As an illustration of the present embodiment, a foam layer 3 is further fixed on the surface of the blank area on the bottom surface of the insulating substrate 1, the foam layer 3 covers the surface of the blank area on the bottom surface in the closed pattern surrounded by the cutting edges 2, and covers the blank area (including the pre-pressing area 11) on the bottom surface outside the closed shape, the cutting edges 2 are spaced between the two foam layers 3 inside the closed pattern and outside the closed pattern, and in a natural state, the surface of the foam layer 3 is higher than the cutting edges 2. When receiving the extrusion, bubble cotton layer 3 is compressed, and cutting edge 2 exposes, adopts this structure to be favorable to protecting cutting edge 2, prevents to be infected with dust, impurity. And, lay the cotton layer 3 of high-elastic bubble in the bottom surface of insulating substrate 1, be favorable to providing the buffering for the pressure of insulating substrate to the pole piece, and the coating of protection pole piece.
Install the cutting die of this embodiment to cross cutting equipment on, cross cutting equipment is including the pole piece conveyor who is used for carrying the pole piece, and the pole piece passes through the cross cutting platform under conveyor's transport, and the cutting die is installed on a elevating system, and the bottom surface level that is fixed with cutting edge 2 of insulating substrate 1 of cutting die is down, and the cutting die is located the top of cross cutting platform. Taking the pole piece conveying device to convey the pole piece from left to right as a reference, the left end of the bottom surface of the prepressing area 11 on the insulating substrate 1 is positioned at the right end of the bottom surface, and the cutting edge 2 corresponding to the prepressing area 11 is positioned at the left end of the bottom surface.
The working principle of the die cutting equipment is that the pole piece conveying device conveys a long-strip coiled pole piece from left to right and unreels the pole piece to a die cutting platform, when the area of the front end of the pole piece is over against the lower part of a prepressing area 11 at the rear end of a cutting die, the pole piece conveying is stopped, the pole piece is clamped to prohibit displacement, a lifting mechanism lowers the cutting die, and the prepressing area 11 at the left side of the insulating substrate 1 tightly presses the front end area of the pole piece to enable the pole piece area to be unfolded and flattened;
and (3) lifting the cutting die, further conveying the pole piece rightwards, stopping conveying the pole piece when the front end area of the unfolded and flattened pole piece is conveyed to the position right below the cutting edge 2, clamping the pole piece to enable the pole piece to be forbidden to move, and descending the cutting die, wherein at the moment:
the cutting edge 2 of the cutting die acts on the unfolded and flattened front end area of the pole piece, the pole piece with the same closed shape enclosed by the cutting edge 2 is die-cut in the front end area of the pole piece, and the die-cut pole piece is collected in a pole piece collecting device for the next working procedure;
meanwhile, the prepressing area 11 on the left side of the blade 2 presses the left area of the pole piece on the die cutting platform of the pole piece to spread and flatten the pole piece for die cutting. Therefore, the area to be die-cut of the pole piece is respectively flattened before die cutting at each time, the unfolding flatness of the die-cut area is ensured, the die-cut size consistency of the pole piece is improved, the powder falling condition of a coating caused by die cutting of the pole piece is improved, and the quality of the pole piece is improved.
In this embodiment, the width of the insulating rubber sheet in the left-right direction is increased to increase the area of the pre-pressing area 11, so as to ensure that the area of the pre-pressing area 11 exceeds the closed shape formed by the blade 2 to a certain extent, and improve the unfolding flatness of the die-cutting of the pole piece. For example, but not limited to, the area of the pre-pressing area 11 is set to be twice or more than twice the area of the closed pattern surrounded by the cutting edges 2, and the length and width of the area are all larger than the closed shape of the cutting edges 2.
As an illustration of the present embodiment, taking the pole piece length obtained by die cutting in the width direction of the long rolled pole piece as an example, the prepressing area 11 of the cutting die may be disposed on the left side of the length direction of the closed pattern enclosed by the cutting edge 2.
As an illustration of the present embodiment, when two or more blades 2 are disposed on the cutting die, each blade 2 corresponds to a pole piece, so that two or more independent pole pieces can be cut simultaneously. On the left side of each blade 2 (taking the example of feeding the pole piece from left to right), a pre-pressing zone 11 corresponding to the blade 2 is provided.
As an illustration of the present embodiment, in order to improve the effective utilization surface of the cutting die, it is preferable to provide the corresponding preliminary land 11 only on the left side of each cutting edge 2, and to maintain the width of the bottom surface blank area on the other outer side of the cutting edge 2 at a constant width to ensure the die cutting, and the width of the bottom surface blank area on the other outer side is narrower than the width of the preliminary land 11.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (9)
1. The utility model provides a cutting die suitable for lithium ion battery pole piece cross cutting, characterized by includes: an insulating substrate is provided on the substrate,
the bottom surface of the insulating substrate is provided with a cutting edge which encloses a closed shape matched with the shape of the pole piece,
the inner part and the outer part of the closed shape are both the bottom surface blank area of the insulating substrate, the surface of the bottom surface blank area is on the same horizontal plane, the blade is protruded from the bottom surface blank area,
the length, the width and the area of at least one side of the closed shape surrounded by the cutting edges are all larger than the blank area of the bottom surface of the closed shape: and the prepressing area corresponds to the cutting edge.
2. The cutting die suitable for lithium ion battery pole piece die cutting of claim 1, wherein the insulating substrate is a rubber plate.
3. The cutting die suitable for die cutting of lithium ion battery pole pieces of claim 1, further comprising: the foam layer is fixed on the surface of the bottom surface blank area, and the cutting edges are arranged between the foam layer on the bottom surface blank area in the closed pattern formed by the cutting edges at intervals and the foam layer on the bottom surface blank area outside the closed pattern formed by the cutting edges.
4. The cutting die suitable for lithium ion battery pole piece die cutting according to claim 3,
in a natural state, the surface of the foam layer is higher than the blade; when the pressure is exerted, the thickness of the foam layer is compressed, and the blade is exposed.
5. The cutting die suitable for lithium ion battery pole piece die cutting according to claim 1, wherein the area of the pre-pressing area is at least twice as large as the closed shape corresponding to the pre-pressing area.
6. The cutting die suitable for lithium ion battery pole piece die cutting according to claim 1, wherein at least two cutting edges are arranged on the bottom surface of the insulating substrate, each cutting edge respectively encloses a closed shape matched with the shape of the pole piece, and the same side of each cutting edge is respectively provided with the pre-pressing area.
7. The cutting die suitable for die cutting of lithium ion battery pole pieces according to claim 1, wherein the pre-pressing area is located on the edge side of the length of the closed shape corresponding to the pre-pressing area.
8. The cutting die suitable for die cutting of lithium ion battery pole pieces as claimed in claim 1, wherein the width of the pre-pressing area is the largest in a blank area of the bottom surface of the periphery of the closed shape surrounded by the cutting edges.
9. The utility model provides a be applicable to lithium ion battery pole piece cross cutting equipment which characterized by includes:
the pole piece conveying device is used for conveying pole pieces, the pole pieces are unfolded to pass through the die cutting platform, the conveying direction of the pole pieces to the die cutting platform is from left to right,
the die cutting platform is used for supporting the pole piece;
the cutting die suitable for lithium ion battery pole piece die cutting of any one of claims 1 to 8, wherein the cutting die is positioned above the die cutting platform,
and a prepressing area on the cutting die is positioned on the left side of the cutting edge corresponding to the prepressing area, when the pole piece is positioned on the die cutting platform, the cutting die descends and presses on the pole piece, the cutting edge cuts the right end area of the pole piece to obtain the pole piece with the shape consistent with the closed figure enclosed by the cutting edge, and the prepressing area of the cutting die presses on the surface of the left end area of the pole piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223349065.6U CN218857209U (en) | 2022-12-14 | 2022-12-14 | Die cutting equipment and cutting die suitable for lithium ion battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223349065.6U CN218857209U (en) | 2022-12-14 | 2022-12-14 | Die cutting equipment and cutting die suitable for lithium ion battery pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218857209U true CN218857209U (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223349065.6U Active CN218857209U (en) | 2022-12-14 | 2022-12-14 | Die cutting equipment and cutting die suitable for lithium ion battery pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218857209U (en) |
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2022
- 2022-12-14 CN CN202223349065.6U patent/CN218857209U/en active Active
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