CN212598237U - Cutting die - Google Patents
Cutting die Download PDFInfo
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- CN212598237U CN212598237U CN202021215993.1U CN202021215993U CN212598237U CN 212598237 U CN212598237 U CN 212598237U CN 202021215993 U CN202021215993 U CN 202021215993U CN 212598237 U CN212598237 U CN 212598237U
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- cutting die
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Abstract
The utility model belongs to the technical field of the cross cutting, a cutting die is disclosed, include: one side of the bottom plate is used for being connected with the power output end; the blade is arranged as an annular blade, and one end of the blade is connected to one side of the bottom plate far away from the power output end; the buffer layer is connected to one side, far away from the power output end, of the bottom plate and is used for buffering the extrusion of the bottom plate on the lithium metal sheet; the elastic piece is connected to the bottom plate and located between the bottom plate and the buffer layer, and the elastic piece can push away the lithium metal sheet from the buffer layer. The method for cutting the metal lithium pole piece by the cutting die is used for cutting the metal lithium pole piece by the cutting die, and by the structure and the method, the cutting die can avoid the adhesion of the metal lithium pole piece when processing the metal lithium pole piece, and is favorable for the rapid and large-scale production of the metal lithium pole piece.
Description
Technical Field
The utility model relates to a cross cutting technical field especially relates to a cutting die.
Background
With the wide application of electric vehicles and various electronic products, the application range of the lithium ion battery with high specific energy is more and more extensive. Because the specific energy of the battery is directly influenced by the capacity of the material used by the battery, the graphite cathode material commonly used at present cannot meet the requirement of the battery with high specific energy because of lower capacity.
Because the theoretical specific capacity is higher and the density is smaller, the metal lithium is the preferred negative electrode material for improving the energy density of the battery. However, because the texture of the lithium metal is soft, the lithium metal sheet is easy to adhere in the process of processing into the electrode plate, and is not easy to separate, but also easy to adhere on a processing cutting die, thereby seriously restricting the large-scale production of the lithium metal electrode plate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cutting die, this cutting die can avoid the adhesion of metal lithium pole piece when processing metal lithium pole piece, is favorable to quick, the scale production of metal lithium pole piece.
To achieve the purpose, the utility model adopts the following technical proposal:
a cutting die, comprising:
one side of the bottom plate is used for being connected to a power output end;
the blade is arranged to be an annular blade, and one end of the blade is connected to one side, far away from the power output end, of the bottom plate;
the buffer layer is connected to one side, far away from the power output end, of the bottom plate and used for buffering extrusion of the bottom plate on the lithium metal sheet;
the elastic piece is connected to the bottom plate and located between the bottom plate and the buffer layer, and the elastic piece can push the lithium metal sheet away from the buffer layer.
Preferably, the bottom plate is provided with a connector, and the connector is used for being connected with the power output end.
Preferably, the buffer layer is of a sponge structure or a silica gel structure.
Preferably, the surface of the annular blade is provided with a stripping layer, and the stripping layer is used for stripping the lithium metal sheet from the annular blade.
Preferably, the stripping layer is a polytetrafluoroethylene structure or a polyformaldehyde structure.
Preferably, the elastic member is a spring, one end of the spring is connected to the bottom plate, and the other end of the spring is used for pushing the lithium metal sheet away from the buffer layer.
Preferably, the spring includes a first spring attached to the base plate inside the ring blade and a second spring attached to the base plate outside the ring blade.
Preferably, the buffer layer is provided with an extending hole, the spring is arranged in the extending hole, and the spring is used for pushing one end of the lithium metal sheet to extend out of the extending hole.
Preferably, the thickness of the annular blade is set in the range of 0.02mm to 1 mm.
The utility model has the advantages that:
the utility model provides a cutting die, this cutting die include bottom plate, blade, buffer layer and elastic component, and one side of bottom plate is used for being connected with power take off end, and the blade sets up to the annular blade, and the one end of blade is connected on one side that power take off end was kept away from to the bottom plate, and under power take off end's drive, the blade is pressed and is cut into the lithium metal thin slice, can follow in the lithium metal thin slice and cut out the lithium metal pole piece according to certain shape. The buffer layer is connected on the side of bottom plate keeping away from power take off end, presses when cutting on the lithium metal thin slice when the blade, and the buffer layer is pressed from both sides between bottom plate and lithium metal thin slice, can cushion the extrusion of bottom plate to the lithium metal thin slice, is favorable to preventing the lithium metal thin slice because of the extrusion impaired. The elastic piece is connected on the bottom plate and stretches out from the buffer layer, and the elastic piece can push away the lithium metal sheet and the lithium metal pole piece that cuts down from the buffer layer, has avoided the adhesion on buffer layer or blade after lithium metal pole piece and the lithium metal sheet are cut, has guaranteed cutting of follow-up lithium metal pole piece, is favorable to quick, the scale production of lithium metal pole piece. The utility model also provides a method of above-mentioned cutting die cutting metal lithium pole piece, can cut metal lithium area or metal lithium thin slice into metal lithium pole piece fast through above-mentioned cutting die of this method, realized metal lithium pole piece's quick, large-scale production.
Drawings
Fig. 1 is a schematic perspective view of a cutting die according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for cutting a lithium metal pole piece by using a cutting die according to an embodiment of the present invention.
In the figure:
1. a base plate; 2. a blade; 3. a buffer layer; 4. an elastic member.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the specific embodiments with reference to the drawings.
The embodiment provides a cutting die for cutting a lithium metal pole piece from a lithium metal sheet, as shown in fig. 1, the cutting die comprises a bottom plate 1 and a blade 2, the bottom plate 1 comprises two sides which are oppositely arranged, one side of the bottom plate 1 is used for connecting a power output end, one end of the blade 2 is connected to one side of the bottom plate 1, which is far away from the power output end, the blade 2 is arranged to be an annular blade, the power output end can drive the blade 2 to move through the bottom plate 1, the blade 2 is pressed and cut into the lithium metal sheet, and the lithium metal pole piece can be cut off from the lithium metal sheet according to a certain shape. It is understood that the cross-sectional shape of the ring blade may be one of a circular ring shape, a semi-circular ring shape, a square ring shape and a special ring shape, and a person skilled in the art may design the specific shape of the cross-section of the ring blade according to the shape of the required lithium metal pole piece, and the specific shape of the cross-section of the ring blade is not particularly limited in this embodiment. Preferably, the bottom plate 1 is a nylon resin member or a metal member, that is, the bottom plate 1 is made of nylon resin or metal, and has high strength and can bear large acting force from the power output end.
Preferably, the bottom plate 1 is provided with a connector, the connector is arranged on the side surface connected with the power output end, and the power output end is connected with the bottom plate 1 through the connector. Specifically, the connector can be for having the structure in joint groove, is equipped with the joint on the power take off end, and power take off end can pass through the joint in the joint inslot, is favorable to the quick installation of this cutting die, is convenient for switch the shape of metal lithium pole piece.
In this embodiment, as shown in fig. 1, the cutting die further includes a buffer layer 3, the buffer layer 3 is connected to a side of the bottom plate 1 away from the power output end, and when the cutting die is used for cutting the lithium metal pole piece, the buffer layer 3 is sandwiched between the bottom plate 1 and the lithium metal sheet, so as to buffer the extrusion of the bottom plate 1 on the lithium metal sheet, which is beneficial to preventing the lithium metal sheet from being damaged due to the extrusion. Specifically, buffer layers 3 are laid on the bottom plate 1 inside the annular blade and the bottom plate 1 outside the annular blade, so that when the metal lithium thin sheet is cut, the metal lithium thin sheet outside the annular blade can be prevented from being damaged, and the metal lithium pole piece inside the annular blade can also be prevented from being damaged. Preferably, the buffer layer 3 is of a sponge structure or a silica gel structure, that is, the buffer layer 3 is made of sponge or silica gel, and can better buffer the extrusion of the bottom plate 1 on the lithium metal sheet.
Preferably, as shown in fig. 1, the cutting die further comprises an elastic member 4, the elastic member 4 is connected to a side of the bottom plate 1 away from the power output end, and the elastic member 4 is located between the bottom plate 1 and the buffer layer 3 and can push the lithium metal sheet away from the buffer layer 3. The elastic element can also be arranged in such a way that one end of the elastic element is connected to the side of the bottom plate 1 far away from the power output end, and the other end of the elastic element extends out of the buffer layer 3. When this cutting die cuts, the cutting die presses to the lithium metal thin slice, the one end butt that bottom plate 1 was kept away from to elastic component 4 is on the lithium metal thin slice and compressed, when this cutting die cuts the end and keeps away from the lithium metal thin slice, elastic component 4 pushes away lithium metal thin slice and lithium metal pole piece from buffer layer 3 under the effect of elastic restoring force, can avoid the adhesion on buffer layer 3 or blade 2 after lithium metal pole piece and lithium metal thin slice are cut, be favorable to guaranteeing cutting of follow-up lithium metal pole piece, be favorable to the quick of lithium metal pole piece, large-scale production.
In this embodiment, the elastic member 4 is a spring, one end of the spring is connected to the side of the bottom plate 1 away from the power output end, and the other end of the spring is used for pushing the lithium metal sheet away from the buffer layer 3. Preferably, the springs comprise a first spring and a second spring, the first spring is connected to an inner bottom plate 1 which is encircled into a ring shape by the annular blade, the second spring is connected to an outer bottom plate 1 which is encircled into a ring shape by the annular blade, the first spring can push the cut lithium metal pole piece away under the action of elastic restoring force, and the second spring can push the cut lithium metal pole piece away under the action of the elastic restoring force. More preferably, the buffer layer 3 is provided with an extending hole, the spring is arranged in the extending hole, and the spring is used for pushing one end of the lithium metal sheet away to extend out of the extending hole, so that the spring can abut against the lithium metal sheet when the cutting die cuts.
Preferably, the thickness of the ring blade is set in the range of 0.02mm to 1 mm. In this embodiment, the thickness of the annular blade is set to 0.5mm, and the thickness can ensure the sharpness of the annular blade, so as to realize smooth cutting of the lithium metal sheet. It will be appreciated that the thickness of the ring blade can be designed by those skilled in the art as is practical. Preferably, the annular blade is a 304 stainless steel blade, and the surface of the annular blade is provided with a stripping layer which can enable the lithium metal sheet to smoothly drop off from the annular blade. Specifically, the stripping layer is of a polytetrafluoroethylene structure or a polyformaldehyde structure, namely the stripping layer is made of polytetrafluoroethylene or polyformaldehyde, so that the adhesion of the lithium metal sheet and the annular blade can be prevented, the edge of the lithium electrode sheet is neat and burr-free, and the phenomenon of knife adhesion is avoided. Optionally, the annular blade is made of polypropylene materials, and the adhesion between the lithium metal sheet and the annular blade can be avoided, so that the edge of the lithium electrode sheet is neat and free of burrs, and the occurrence of knife adhesion is avoided. It can be understood that the annular blade can also be directly made of polytetrafluoroethylene or polyformaldehyde, so that the annular blade can prevent the lithium metal sheet from being adhered to the annular blade, the edge of the lithium electrode sheet is tidy and free of burrs, and the phenomenon of knife adhesion is avoided.
In this embodiment, the lithium metal flakes may be pure lithium metal (greater than 99%); lithium alloys such as lithium magnesium alloy, lithium aluminum alloy, lithium copper alloy, etc.; and the composite sheet can also be made of metal lithium sheets and other metal sheets (such as magnesium sheets, aluminum sheets, copper sheets and the like). Preferably, the thickness of the lithium metal flake is set in the range of 1 μm to 2000. mu.m. Specifically, the thickness of the lithium metal sheet was set to 30 μm, the width of the lithium metal sheet was set to 100mm, the length of the ring blade was set to 50mm, and the width of the ring blade was set to 40mm, so that the cutting of the lithium metal sheet by the cutting die was facilitated.
The embodiment also provides a method for cutting the metal lithium pole piece by using the cutting die, as shown in fig. 2, the method comprises the following steps:
s1, laying a metal lithium belt or a metal lithium sheet on a plane. The metal lithium belt is stretched into a sheet shape, the stretched metal lithium belt or metal lithium sheet is horizontally laid on the plane, no gap is formed between the metal lithium belt or metal lithium sheet and the plane, and the metal lithium belt or metal lithium sheet is prevented from being tilted on the plane to influence the cutting of the metal lithium belt or metal lithium sheet by the cutting die.
The metallic lithium strip or the metallic lithium sheet can be made of pure metallic lithium (purity > 99%) or metallic lithium alloy, including but not limited to lithium magnesium alloy, lithium aluminum alloy, lithium copper alloy, and the like; composite sheets made from lithium metal sheets and other metal sheets (e.g., magnesium sheets, aluminum sheets, copper sheets, etc.) may also be used, including but not limited to lithium copper composite sheets. S2, placing the cutting die right above the metal lithium belt or the metal lithium sheet.
And placing the cutting die right above the metal lithium belt or the metal lithium sheet, and keeping the cutting die and the metal lithium belt or the metal lithium sheet to be arranged in parallel, so that the cutting die can cut the metal lithium belt or the metal lithium sheet conveniently.
And S3, enabling the cutting die to approach the metal lithium belt or the metal lithium sheet at a preset speed, and enabling the cutting die to press the metal lithium belt or the metal lithium sheet.
The power output end drives the cutting die to approach the metal lithium belt or the metal lithium sheet at a speed of 0.1-1 m/s, preferably, the power output end drives the cutting die to press and cut the metal lithium belt or the metal lithium sheet at a speed of 0.5m/s, so that when the cutting die is cut on the metal lithium belt or the metal lithium sheet, the cut part can be smoothly taken off from the metal lithium belt or the metal lithium sheet.
S4, the cutting die keeps pressing the metal lithium belt or the metal lithium sheet for a certain time at a preset pressure.
When the cutting die is pressed on the metal lithium belt or the metal lithium sheet, the pressure applied by the power output end to the cutting die is 0.5Mpa, and the pressure maintaining time is 0.1s-5s, so that the smooth cutting of the metal lithium belt or the metal lithium sheet is favorably realized. In this example, the cutting die was pressed against the lithium metal tape or the lithium metal sheet at a pressure of 0.5Mpa for a pressing time of 0.3 s.
S5, the cutting die is far away from the metal lithium belt or the metal lithium sheet, and the cutting die is reset.
And after the time for pressing the metal lithium belt or the metal lithium sheet by the cutting die is over, the cutting die moves in the direction away from the metal lithium belt or the metal lithium sheet, the cutting die returns to the position right above the metal lithium belt or the metal lithium sheet again, and the cutting die finishes cutting the metal lithium belt or the metal lithium sheet once.
By the method for cutting the metal lithium pole piece through the cutting die, the cutting die can quickly cut a metal lithium belt or a metal lithium sheet into the metal lithium pole piece, and the quick and large-scale production of the metal lithium pole piece is facilitated.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A cutting die, comprising:
the power supply device comprises a bottom plate (1), wherein one side of the bottom plate (1) is used for being connected to a power output end;
the blade (2) is arranged to be an annular blade, and one end of the blade (2) is connected to one side, away from the power output end, of the bottom plate (1);
the buffer layer (3) is connected to one side, away from the power output end, of the bottom plate (1), and the buffer layer (3) is used for buffering extrusion of the bottom plate (1) on a lithium metal sheet;
the elastic piece (4) is connected to the bottom plate (1), the elastic piece (4) is located between the bottom plate (1) and the buffer layer (3), and the elastic piece (4) can push the lithium metal sheet away from the buffer layer (3).
2. Cutting die according to claim 1, characterized in that a connector is arranged on the base plate (1), and the connector is used for connecting with the power output end.
3. The cutting die according to claim 1, characterized in that the cushioning layer (3) is of a sponge structure or a silicone structure.
4. The cutting die according to claim 1, wherein the surface of the annular blade is provided with a stripper layer for stripping the lithium metal foil from the annular blade.
5. The cutting die of claim 4, wherein the stripper layer is a polytetrafluoroethylene structure or a polyoxymethylene structure.
6. The cutting die according to claim 1, characterized in that the elastic member (4) is a spring, one end of which is connected to the base plate (1) and the other end of which is used for pushing the lithium metal foil away from the buffer layer (3).
7. Cutting die according to claim 6, characterized in that the springs comprise a first spring connected to the base plate (1) inside the ring blade and a second spring connected to the base plate (1) outside the ring blade.
8. The cutting die according to claim 6, wherein the buffer layer (3) is provided with an extending hole, the spring is arranged in the extending hole, and the spring is used for pushing one end of the lithium metal sheet to extend out of the extending hole.
9. The cutting die of claim 1, wherein the thickness of the ring blade is set in a range of 0.02mm to 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021215993.1U CN212598237U (en) | 2020-06-28 | 2020-06-28 | Cutting die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021215993.1U CN212598237U (en) | 2020-06-28 | 2020-06-28 | Cutting die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212598237U true CN212598237U (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021215993.1U Active CN212598237U (en) | 2020-06-28 | 2020-06-28 | Cutting die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760962A (en) * | 2020-06-28 | 2020-10-13 | 惠州亿纬锂能股份有限公司 | Cutting die, method for cutting metal lithium pole piece by using same and battery |
-
2020
- 2020-06-28 CN CN202021215993.1U patent/CN212598237U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760962A (en) * | 2020-06-28 | 2020-10-13 | 惠州亿纬锂能股份有限公司 | Cutting die, method for cutting metal lithium pole piece by using same and battery |
| CN111760962B (en) * | 2020-06-28 | 2024-05-03 | 惠州亿纬锂能股份有限公司 | Cutting die, method for cutting metal lithium pole piece by using cutting die and battery |
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