CN219130331U - Lithium ion battery pole piece extension device - Google Patents
Lithium ion battery pole piece extension device Download PDFInfo
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- CN219130331U CN219130331U CN202223308222.9U CN202223308222U CN219130331U CN 219130331 U CN219130331 U CN 219130331U CN 202223308222 U CN202223308222 U CN 202223308222U CN 219130331 U CN219130331 U CN 219130331U
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- pole piece
- pressure
- material layer
- resistant material
- lithium ion
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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 belongs to a lithium ion battery pole piece extending device in the technical field of lithium ion batteries. The pressure-resistant roller comprises a working roller (1), wherein a first pressure-resistant material layer (5) is arranged on the working roller (1) close to one side, a second pressure-resistant material layer (6) is arranged on the working roller (1) close to the other side, the first pressure-resistant material layer (5) and the second pressure-resistant material layer (6) are working roller middle surfaces (7), the outer side of the first pressure-resistant material layer (5) is a first outer side surface (8), and the outer side of the second pressure-resistant material layer (6) is a second outer side surface (9). The lithium ion battery pole piece extension device is simple in structure, can effectively solve the problems of wrinkling, wavy edges, broken strips and the like caused by inconsistent extension of an empty foil area and a coating area in the pole piece rolling process, and improves the quality of the pole piece.
Description
Technical Field
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion battery pole piece extending device.
Background
The preparation process of the pole piece of the lithium ion battery comprises the working procedures of stirring, coating, rolling, slitting and the like. Among them, pole piece rolling is an indispensable process for improving the energy density of lithium batteries. The pole piece comprises a film coating area, an AT9 area and an empty foil area, wherein the thickness difference of the film coating area, the AT9 area and the empty foil area is as follows: when the thickness of the film coating area is greater than that of the AT9 area and that of the empty foil area, the film coating area is rolled tightly to roll to expand, the AT9 area is slightly expanded to be smaller, and the empty foil area is in a suspended state and is not expanded, so that various problems such as folds, wavy edges, broken bands and the like are caused by large expansion difference between the film coating area and the empty foil area. In order to solve the above problems, a solution is proposed in the prior art, and the solution has the modes of arranging a pin structure, a concave-convex special-shaped roller rolling, a separate heating empty foil area and the like on a working roller, which have defects, and can not completely solve the problems caused by inconsistent extension of a film coating area and a tab area, and the product has various types, different thickness differences of the film coating area and the tab area, and poor universality of the modes.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: aiming at the defects of the prior art, the lithium ion battery pole piece extending device has a simple structure, can effectively solve the problems of wrinkles, wavy edges, broken bands and the like caused by inconsistent extension of an empty foil area and a film coating area in the pole piece rolling process, and improves the quality of the pole piece.
The technical scheme adopted by the utility model is as follows:
the utility model relates to a lithium ion battery pole piece extending device, which comprises a working roller, wherein a first pressure-resistant material layer is arranged on the working roller close to one side, a second pressure-resistant material layer is arranged on the working roller close to the other side, the first pressure-resistant material layer and the second pressure-resistant material layer are the middle surfaces of the working roller, the outer side of the first pressure-resistant material layer is a first outer side surface, and the outer side of the second pressure-resistant material layer is a second outer side surface.
The lithium ion battery pole piece comprises a pole piece substrate, a pole piece coating region is arranged in the middle of the pole piece substrate, a first AT9 region is arranged on one side of the pole piece coating region, a second AT9 region is arranged on the other side of the pole piece coating region, a first empty foil region is arranged on the outer side of the first AT9 region, and a second empty foil region is arranged on the outer side of the second AT9 region.
When the lithium ion battery pole piece extending device extends the lithium ion battery pole piece, the middle of the working roll corresponds to a pole piece coating area, the first pressure-resistant material layer corresponds to a first AT9 area and a first empty foil area, and the second pressure-resistant material layer corresponds to a second AT9 area and a second empty foil area.
The thickness of the first pressure-resistant material layer corresponding to the first AT9 area is the thickness difference between the pole piece film coating area and the first AT9 area, and the thickness of the first pressure-resistant material layer corresponding to the first empty foil area is the thickness difference between the first empty foil area and the pole piece film coating area.
The thickness of the second pressure-resistant material layer corresponding to the second AT9 area is the thickness difference between the pole piece film coating area and the second AT9 area, and the thickness of the second pressure-resistant material layer corresponding to the second empty foil area is the thickness difference between the second empty foil area and the pole piece film coating area.
The working rolls comprise an upper working roll and a lower working roll.
The first pressure-resistant material layer and the second pressure-resistant material layer are both structures made of nylon materials.
The first pressure-resistant material layer and the second pressure-resistant material layer are both structures made of steel materials.
The first pressure-resistant material layer is arranged along the circumference of the working roller, and the second pressure-resistant material layer is arranged along the circumference of the working roller.
By adopting the technical scheme of the utility model, the working principle and the beneficial effects are as follows:
when the lithium ion battery pole piece extending device is used for extending the lithium ion battery pole piece, the lithium ion battery pole piece passes through between two working rolls to realize rolling, and the extending is carried out in the rolling process, so that the structure of the working rolls is improved. Because the thickness of each area on the surface of the lithium ion battery pole piece is different, the first pressure-resistant material layer and the second pressure-resistant material layer are arranged, so that the thickness of each area of the working roller is also different. When the lithium ion battery pole piece is extended, the middle of the working roll corresponds to a pole piece coating area, the first pressure-resistant material layer corresponds to a first AT9 area and a first empty foil area, and the second pressure-resistant material layer corresponds to a second AT9 area and a second empty foil area. Like this, the different thickness on first withstand voltage material layer to compensate the thickness difference between first empty foil area and first AT9 district and the pole piece district of filming in the roll-in process, the different thickness on second withstand voltage material layer, with the thickness difference between second empty foil area and second AT9 district and the pole piece district of filming in the roll-in process, make the different district of lithium ion battery pole piece accomplish synchronous tensile extension in the roll-in process, reduce fold, the wave limit that causes because of the extension inconsistency, the broken tape problem, improve pole piece overall quality and compare with prior art, the structure is light, easy to install, effectively make up thickness difference, make the extension in each district of whole pole piece unanimous, and overall cost can not increase a lot.
Drawings
The following is a brief description of what is expressed in the drawings of this specification and the references in the drawings:
fig. 1 is a schematic structural diagram of a lithium ion battery pole piece extension device according to the present utility model;
the reference numerals in the figures are respectively: 1. a work roll; 2. a pole piece coating area; 3. a first AT9 zone; 4. a first empty foil region; 5. a first pressure-resistant material layer; 6. a second pressure-resistant material layer; 7. a work roll intermediate surface; 8. a first outer side; 9. a second outer side; 10. a second AT9 zone; 11. a second empty foil region; 12. an upper work roll; 13. a lower work roll; 14. a pole piece substrate.
Detailed Description
The following describes the shape, structure, mutual position and connection relation between parts, action of parts and working principle of the specific embodiment of the present utility model by describing examples in further detail:
as shown in figure 1, the utility model relates to a lithium ion battery pole piece extension device, which comprises a working roller 1, wherein a first pressure-resistant material layer 5 is arranged on the working roller 1 near one side, a second pressure-resistant material layer 6 is arranged on the working roller 1 near the other side, the first pressure-resistant material layer 5 and the second pressure-resistant material layer 6 are working roller middle surfaces 7, the outer side of the first pressure-resistant material layer 5 is a first outer side surface 8, and the outer side of the second pressure-resistant material layer 6 is a second outer side surface 9. The structure provides an improved technical scheme aiming at the defects in the prior art. When the lithium ion battery pole piece is stretched, the device provided by the utility model is used, the lithium ion battery pole piece passes through between the two working rolls to realize rolling, and the lithium ion battery pole piece is stretched in the rolling process, so that the structure of the working rolls is improved. Because the thickness of each area on the surface of the lithium ion battery pole piece is different, the first pressure-resistant material layer 5 and the second pressure-resistant material layer 6 are arranged, so that the thickness of each area of the working roller is also different. When the lithium ion battery pole piece is extended, the middle surface 7 of the working roller corresponds to the pole piece coating region 2, the first pressure-resistant material layer 5 corresponds to the first AT9 region 3 and the first empty foil region 4, and the second pressure-resistant material layer 6 corresponds to the second AT9 region 10 and the second empty foil region 11. Like this, the different thickness of first withstand voltage material layer 5 to compensate the thickness difference between first empty foil area and first AT9 district and the pole piece district of filming in the roll-in process, the different thickness of second withstand voltage material layer 6, with the thickness difference between second empty foil area and second AT9 district and the pole piece district of filming in the roll-in process, make the different district of lithium ion battery pole piece accomplish synchronous stretching extension in the roll-in process, reduce fold, the wave limit that causes because of the extension inconsistency, the broken tape problem, improve pole piece bulk quality and compare with prior art, the structure is light, easy to install, effectively make up thickness difference, make the extension of each district of whole pole piece unanimous, and overall cost can not increase a lot. The lithium ion battery pole piece extension device is simple in structure, can effectively solve the problems of wrinkling, wavy edges, broken strips and the like caused by inconsistent extension of an empty foil area and a coating area in the pole piece rolling process, and improves the quality of the pole piece.
The lithium ion battery pole piece comprises a pole piece substrate 14, a pole piece film coating area 2 is arranged in the middle of the pole piece substrate 14, a first AT9 area 3 is arranged on one side of the pole piece film coating area 2, a second AT9 area 10 is arranged on the other side of the pole piece film coating area 2, a first empty foil area 4 is arranged on the outer side of the first AT9 area 3, and a second empty foil area 11 is arranged on the outer side of the second AT9 area 10. When the lithium ion battery pole piece extending device extends the lithium ion battery pole piece, the middle surface 7 of the working roller corresponds to the pole piece coating region 2, the first pressure-resistant material layer 5 corresponds to the first AT9 region 3 and the first empty foil region 4, and the second pressure-resistant material layer 6 corresponds to the second AT9 region 10 and the second empty foil region 11. Above-mentioned structure improves the structure of work roll, because the work roll carries out the roll-in to the polar plate, and because the different district thickness of polar plate is different, changes the thickness in the different district of work roll to corresponding to the structure of polar plate, compensation thickness is poor, improves extension effect.
The thickness of the first pressure-resistant material layer 5 corresponding to the first AT9 region 3 is the thickness difference between the pole piece film coating region 2 and the first AT9 region 3, and the thickness of the first pressure-resistant material layer 5 corresponding to the first empty foil region 4 is the thickness difference between the first empty foil region 4 and the pole piece film coating region 2. The thickness of the second pressure-resistant material layer 6 corresponding to the second AT9 region 10 is the thickness difference between the pole piece film coating region 2 and the second AT9 region 10, and the thickness of the second pressure-resistant material layer 6 corresponding to the second empty foil region 11 is the thickness difference between the second empty foil region 11 and the pole piece film coating region 2. According to the structure, the AT9 area and the empty foil area are respectively arranged on the two sides of the pole piece, when rolling is carried out, the pressure-resistant material layer on each side of the working roller is respectively in corresponding contact with the AT9 area and the empty foil area on one side, and the thicknesses of the areas of the working roller are different.
The working roll 1 comprises an upper working roll 12 and a lower working roll 13. Above-mentioned structure, upper working roll 12, lower working roll 13 parallel arrangement form the roll-in gap between the two, and the pole piece of being convenient for passes through from the gap, realizes the roll-in. In the utility model, AT9 is a tab insulating coating.
The first pressure-resistant material layer 5 and the second pressure-resistant material layer 6 are both made of nylon materials. The first pressure-resistant material layer 5 and the second pressure-resistant material layer 6 are both made of steel materials. With the structure, the pressure-resistant material layer is made of a material with high hardness, and is not easy to wear. In this way, a reliable action on the corresponding region of the pole piece during operation is ensured. The pressure-resistant material layer is not easy to wear after long-term use, so that the overall size is kept unchanged, and the precision of the pressure-resistant material layer is effectively ensured.
The first pressure-resistant material layer 5 is arranged along the circumference of the working roll 1, and the second pressure-resistant material layer 6 is arranged along the circumference of the working roll 1. According to the structure, when the working roller works, the working roller performs circular motion, and the pressure-resistant material layer is arranged along a circle and can continuously and correspondingly act on the corresponding area of the pole piece.
The structure of the utility model can realize the technical effects, and test verification examples are carried out:
experiment group a: the positive pole piece is rolled on a rolling device at a compaction density of 2.48g/cm < 3 >, 10 rolls are rolled together, more serious folds and wavy edges appear on each roll, the strip is broken for 18 times, and the strip is broken for 1.8 times. Experimental group B: the positive pole piece is rolled on rolling equipment provided with pressure-resistant materials at a compaction density of 2.48g/cm < 3 >, 10 rolls are rolled together, and the problems of wrinkles, wavy edges, broken belts and the like are avoided. Therefore, the device of the utility model can effectively solve the problems of the prior art.
While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the specific implementation of the utility model is not limited by the foregoing, but rather is within the scope of the utility model as long as various modifications are made by the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model are directly applied to other occasions without modification.
Claims (9)
1. The utility model provides a lithium ion battery pole piece extension device which characterized in that: the pressure-resistant roller comprises a working roller (1), wherein a first pressure-resistant material layer (5) is arranged on the working roller (1) close to one side, a second pressure-resistant material layer (6) is arranged on the working roller (1) close to the other side, the first pressure-resistant material layer (5) and the second pressure-resistant material layer (6) are working roller middle surfaces (7), the outer side of the first pressure-resistant material layer (5) is a first outer side surface (8), and the outer side of the second pressure-resistant material layer (6) is a second outer side surface (9).
2. The lithium ion battery pole piece extension device according to claim 1, wherein: the lithium ion battery pole piece comprises a pole piece base material (14), a pole piece film coating area (2) is arranged AT the middle part of the pole piece base material (14), a first AT9 area (3) is arranged AT one side of the pole piece film coating area (2), a second AT9 area (10) is arranged AT the other side of the pole piece film coating area (2), a first empty foil area (4) is arranged AT the outer side of the first AT9 area (3), and a second empty foil area (11) is arranged AT the outer side of the second AT9 area (10).
3. The lithium ion battery pole piece extension device according to claim 2, wherein: when the lithium ion battery pole piece extending device extends the lithium ion battery pole piece, the middle surface (7) of the working roller corresponds to the pole piece coating region (2), the first pressure-resistant material layer (5) corresponds to the first AT9 region (3) and the first empty foil region (4), and the second pressure-resistant material layer (6) corresponds to the second AT9 region (10) and the second empty foil region (11).
4. A lithium ion battery pole piece extension device as defined in claim 3, wherein: the thickness of the first pressure-resistant material layer (5) corresponding to the first AT9 region (3) is the thickness difference between the pole piece film coating region (2) and the first AT9 region (3), and the thickness of the first pressure-resistant material layer (5) corresponding to the first empty foil region (4) is the thickness difference between the first empty foil region (4) and the pole piece film coating region (2).
5. The lithium ion battery pole piece extension device according to claim 4, wherein: the thickness of the second pressure-resistant material layer (6) corresponding to the second AT9 region (10) is the thickness difference between the pole piece film coating region (2) and the second AT9 region (10), and the thickness of the second pressure-resistant material layer (6) corresponding to the second empty foil region (11) is the thickness difference between the second empty foil region (11) and the pole piece film coating region (2).
6. The lithium ion battery pole piece extension device according to claim 1 or 2, wherein: the working roll (1) comprises an upper working roll (12) and a lower working roll (13).
7. The lithium ion battery pole piece extension device according to claim 1 or 2, wherein: the first pressure-resistant material layer (5) and the second pressure-resistant material layer (6) are both made of nylon materials.
8. The lithium ion battery pole piece extension device according to claim 1 or 2, wherein: the first pressure-resistant material layer (5) and the second pressure-resistant material layer (6) are both made of steel materials.
9. The lithium ion battery pole piece extension device according to claim 7, wherein: the first pressure-resistant material layer (5) is arranged along the circumference of the working roller (1), and the second pressure-resistant material layer (6) is arranged along the circumference of the working roller (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223308222.9U CN219130331U (en) | 2022-12-10 | 2022-12-10 | Lithium ion battery pole piece extension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223308222.9U CN219130331U (en) | 2022-12-10 | 2022-12-10 | Lithium ion battery pole piece extension device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219130331U true CN219130331U (en) | 2023-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223308222.9U Active CN219130331U (en) | 2022-12-10 | 2022-12-10 | Lithium ion battery pole piece extension device |
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| Country | Link |
|---|---|
| CN (1) | CN219130331U (en) |
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2022
- 2022-12-10 CN CN202223308222.9U patent/CN219130331U/en active Active
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