CN214813994U - Pole piece rolling and die cutting device - Google Patents
Pole piece rolling and die cutting device Download PDFInfo
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- CN214813994U CN214813994U CN202120521508.1U CN202120521508U CN214813994U CN 214813994 U CN214813994 U CN 214813994U CN 202120521508 U CN202120521508 U CN 202120521508U CN 214813994 U CN214813994 U CN 214813994U
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- pole piece
- roll
- assembly
- cutting device
- roll assembly
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- 238000005520 cutting process Methods 0.000 title claims abstract description 61
- 238000005096 rolling process Methods 0.000 title claims description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 5
- 239000013543 active substance Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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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- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model relates to a power battery makes technical field, especially relates to a pole piece roll-in cutting device. It includes: the roll mechanism comprises a first roll assembly and a second roll assembly, the second roll assembly is arranged at the downstream of the first roll assembly, and the pole piece is rolled by the first roll assembly and the second roll assembly; the oven is arranged on the pole piece transmission path, is positioned between the first roll assembly and the second roll assembly and is used for baking the pole piece; a die cutting assembly disposed on the pole piece drive path downstream of the second roll assembly for die cutting the pole piece. The pole piece process because the utility model discloses in the pole piece that provides just get into cross cutting technology after toasting immediately, consequently, pole piece thickness dimensional change is little, utmost point ear cross cutting dimensionally stable.
Description
Technical Field
The utility model relates to a power battery makes technical field, especially relates to a pole piece roll-in cutting device.
Background
At present, most of lithium ion battery negative electrode plate preparation comprises the process modes of raw material stirring, coating, normal temperature rolling and die cutting. Wherein the bonding strength between the active substance and the current collector is enhanced by rolling at normal temperature, and the internal porosity of the active substance is reduced. However, after the negative pole piece is rolled at normal temperature, the pole piece rebounds in different sizes at each position, and the die cutting is carried out when the pole piece does not rebound fully. Such a tableting approach has some disadvantages: 1) the main material of the negative plate is graphite which has rebound property, the negative plate is rolled and coiled, the rebound thicknesses of the inner ring, the middle ring and the outer ring are not uniform, and some places have no full rebound; 2) the pole piece rebounds slowly at normal temperature, the pole piece does not rebound completely, next-step die cutting is carried out, the die cutting size deviation of the pole lug is large, the thickness is not uniform, and the die cutting die is abraded greatly; 3) after the cathode plate which does not bounce completely is subjected to die cutting and wound with the anode plate and the diaphragm, the alignment degree of the pole lugs of the winding core is poor, the pole lugs are uneven, the assembly process of the winding core is influenced, the rejection rate of the winding core is high, and the manufacturing cost is high.
Therefore, a pole piece rolling and die cutting device is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pole piece roll-in cutting device can make the negative pole piece that obtains fully bounce-back with higher speed, and each position thickness of pole piece is more homogeneous and stable.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a pole piece roll-in cutting device includes:
the roll mechanism comprises a first roll assembly and a second roll assembly, the second roll assembly is arranged at the downstream of the first roll assembly, and the pole piece is rolled by the first roll assembly and the second roll assembly;
the oven is arranged on the pole piece transmission path, is positioned between the first roll assembly and the second roll assembly and is used for baking the pole piece;
a die cutting assembly disposed on the pole piece drive path downstream of the second roll assembly for die cutting the pole piece.
As an optimal technical scheme of the pole piece rolling and die cutting device, the oven comprises an oven body and a baking piece arranged in the oven body, and the oven body is provided with an inlet through which the pole piece can penetrate and an outlet through which the pole piece can penetrate.
As an optimal technical scheme of the pole piece rolling and die cutting device, the baking piece comprises a heating assembly and an air supply assembly, and the air supply assembly is arranged in the box body and close to one end of the inlet.
As a preferred technical scheme of the pole piece rolling and die cutting device, at least two groups of baking pieces are arranged in the box body, and the baking pieces are positioned on two sides of the pole piece to bake the pole piece.
As a preferable technical scheme of the pole piece rolling and die cutting device, the heating assembly comprises an electric heating pipe, and the air supply assembly comprises a fan.
As a preferred technical scheme of the pole piece rolling and die cutting device, the heating assembly comprises a heating body, and the heating body extends along the transmission direction of the pole piece.
As a preferable technical scheme of the above pole piece rolling and die cutting device, the first roll assembly includes a first upper roll and a first lower roll, and the first upper roll and the first lower roll the pole piece.
As a preferable technical scheme of the pole piece rolling and die cutting device, the second roll assembly comprises a second upper roll and a second lower roll, and the second upper roll and the second lower roll the pole piece.
As an optimized technical scheme of the pole piece rolling and die cutting device, the pole piece rolling and die cutting device further comprises a supporting assembly for supporting the pole piece, and the supporting assembly is arranged on a transmission path of the pole piece.
As a preferable technical scheme of the above pole piece rolling and die cutting device, the pole piece rolling and die cutting device further comprises a winding shaft which is arranged on the transmission path of the pole piece and is located at the downstream of the die cutting assembly.
The utility model discloses beneficial effect:
the utility model discloses in, through setting up the oven on the transmission path at the pole piece, and set up the oven in the low reaches of first roll assembly, still be located the upper reaches of second roll assembly simultaneously, the pole piece after once rolling in carries out the secondary roll-in after toasting promptly, because pole piece temperature is higher when the secondary roll-in, and the pole piece toasts under the state of opening a book, thereby avoided toasting the process alone and toasting the problem that the back pole piece curls after the roll-in, thereby the negative pole piece that obtains fully rebounds with higher speed, pole piece each position thickness homogeneous and stability. The pole piece process because the utility model discloses in the pole piece that provides just get into cross cutting technology after toasting immediately, consequently, pole piece thickness dimensional change is little, utmost point ear cross cutting dimensionally stable. After the pole piece of cross cutting after toasting is coiled at the diaphragm, it is high to roll up a core utmost point ear alignment degree, reduces to roll up a core and scraps, practices thrift the cost, reduces the super thick problem that full electricity negative pole piece fold of electric core leads to electric core.
Drawings
Fig. 1 is a schematic structural diagram of a pole piece rolling die cutting device provided by the embodiment of the present invention.
In the figure:
1. a first roll assembly; 2. a second roll assembly; 3. an oven; 31. a box body; 32. a heating assembly; 33. an air supply assembly; 4. a die cutting assembly; 5. passing through a roller; 6. a support roller; 7. and (6) pole pieces.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
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.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The utility model provides a pole piece roll-in cutting device, as shown in figure 1, this pole piece roll-in cutting device includes: a roller mechanism, an oven 3 and a die cutting assembly 4. The roller mechanism comprises a first roller assembly 1 and a second roller assembly 2, the second roller assembly 2 is arranged at the downstream of the first roller assembly 1, and the pole piece 7 is rolled by the first roller assembly 1 and the second roller assembly 2; the oven 3 is arranged on the transmission path of the pole piece 7 and is positioned at the downstream of the first roll assembly 1 and is also positioned at the upstream of the second roll assembly 2, namely the oven 3 is positioned between the first roll assembly 1 and the second roll assembly 2, and the oven 3 is used for baking the pole piece 7; the die cutting assembly 4 is arranged on the transmission path of the pole piece 7 and is positioned at the downstream of the second roll assembly 2 for die cutting the baked pole piece 7.
The utility model discloses in, through set up oven 3 on the transmission path at pole piece 7, and set up oven 3 in the low reaches of first roll set spare 1, still be located second roll set spare 2's upper reaches simultaneously, pole piece 7 after once rolling carries out the secondary roll-in after toasting promptly, because pole piece 7 temperature is higher when the secondary roll-in, and pole piece 7 toasts under the state of opening a book, thereby avoided toasting the process alone and toasting the problem that back pole piece 7 curls after the roll-in, thereby the negative pole piece 7 of obtaining fully rebounds with higher speed, pole piece 7 each position thickness homogeneous and stable. Pole piece 7 process because the utility model discloses in the pole piece 7 that provides just get into cross cutting technology immediately after toasting, consequently, 7 thickness dimensional change of pole piece are little, utmost point ear cross cutting dimensionally stable. After the pole piece 7 of cross cutting after toasting is coiled at the diaphragm, it is high to roll up a core utmost point ear alignment degree, reduces to roll up a core and scraps, practices thrift the cost, reduces the super thick problem of electric core that leads to of full electric negative pole piece 7 folds of electric core.
Optionally, in this embodiment the first roll assembly 1 comprises a first upper roll and a first lower roll, which roll press the pole piece 7. The second roll assembly 2 comprises an upper second roll and a lower second roll, which roll the pole pieces 7.
In this embodiment, with continued reference to fig. 1, the oven 3 includes a box 31 and a baking member disposed in the box 31, and the box 31 is provided with an inlet through which the pole piece 7 can pass and an outlet through which the pole piece 7 can pass. The baking part is used for baking the part of the pole piece 7 in the oven 3, the pole piece 7 can move in the oven 3 at a constant speed, and the tape moving speed of the pole piece 7 is 40-50 m/min. Thereby ensuring that all parts of the pole piece 7 are heated uniformly.
Specifically, one implementation of the baking component is: the baking part comprises a heating assembly 32 and an air supply assembly 33, and the air supply assembly 33 is arranged at one end of the box body 31 close to the inlet. The air supply assembly 33 blows directly to the heating assembly 32, so that baking air is provided for the pole piece 7, the flowing of heat inside the box body 31 is accelerated, and the pole piece 7 in the box body 31 can be kept to move in a high-temperature environment.
Preferably, at least two groups of baking parts are arranged in the box body 31, and the baking parts are positioned on two sides of the pole piece 7 to bake the pole piece. It can be understood that the baking parts are arranged in pairs, and the paired baking parts are positioned on the upper side and the lower side of the pole piece 7, so that the upper side and the lower side of the pole piece 7 are baked simultaneously, the heating area of the pole piece 7 is further increased, and the baking efficiency is improved.
Preferably, in the present embodiment, the heating assembly 32 includes an electric heating tube, and the air supply assembly 33 includes a fan, so as to supply the baking air to the pole piece 7. Specifically, the temperature in the oven 3 in this embodiment is 80 ℃ to 90 ℃. The fan speed is 8m/min-12 m/min. Specifically, the length of the heating assembly 32 is equal to the width of the pole piece 7, wherein the length of the heating assembly 32 is perpendicular to the conveying direction of the pole piece 7, and the arrangement mode can ensure the baked area of the pole piece 7.
In other embodiments, the heating assembly 32 comprises a heat generating body which is arranged to extend in the transport direction of the pole piece 7.
In this embodiment, the pole piece rolling and die cutting device further includes a support assembly for supporting the pole piece 7, and the support assembly is disposed on the transmission path of the pole piece 7 and is used for supporting the pole piece 7. The support assembly comprises a plurality of rollers 5, the rollers 5 are respectively arranged at the upstream of the first roller assembly 1 and at the downstream of the second roller assembly 2, and one roller 5 of the two adjacent rollers 5 is used for being in contact with the upper surface of the pole piece 7, and the other roller 5 is used for being in contact with the lower surface of the pole piece 7, so that the support for the pole piece 7 is formed. The support assembly further comprises support rollers 6 for flattening the pole piece 7, two support rollers 6 being arranged between the first roll assembly 1 and the second roll assembly 2, one of the support rollers 6 being located in the housing 31. Of course in other embodiments the support rollers 6 may be arranged both inside the box 31 and outside the box 31.
Preferably, in this embodiment, the pole piece rolling and die cutting device further includes a winding shaft disposed on the transmission path of the pole piece 7 and located at the downstream of the die cutting assembly 4, so as to wind the unfolded pole piece 7, thereby facilitating the subsequent processes.
The oven is arranged between the first roll assembly 1 and the second roll assembly 2, the pole piece 7 which is rolled by the first roll assembly 1 is baked by the oven, the independent baking process after rolling is avoided, the baked pole piece 7 is rolled for the second time by the second roll assembly 2, and the process time required by the independent baking of the pole piece 7 can be shortened, so that the manufacturing period of the power battery is shortened, the pole piece 7 is baked in an uncoiling form, the thickness and size of the pole piece 7 before being rolled for the second time are changed slightly, and the die cutting size of the pole lug is stable.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a pole piece roll-in cutting device which characterized in that includes:
the roll mechanism comprises a first roll assembly (1) and a second roll assembly (2), the second roll assembly (2) is arranged at the downstream of the first roll assembly (1), and the pole piece (7) is rolled by the first roll assembly (1) and the second roll assembly (2);
the oven (3) is arranged on the transmission path of the pole piece (7) and is positioned between the first roll assembly (1) and the second roll assembly (2) and used for baking the pole piece (7);
a die cutting assembly (4) disposed on the pole piece (7) drive path downstream of the second roll assembly (2) for die cutting of the pole piece (7).
2. The pole piece rolling and die cutting device according to claim 1, characterized in that the oven (3) comprises a box body (31) and a baking piece arranged in the box body (31), and the box body (31) is provided with an inlet through which the pole piece (7) can penetrate and an outlet through which the pole piece (7) can penetrate.
3. The pole piece rolling and die cutting device according to claim 2, wherein the baking piece comprises a heating assembly (32) and an air supply assembly (33), and the air supply assembly (33) is arranged in the box body (31) and close to one end of the inlet.
4. The pole piece rolling and die cutting device according to claim 2 or 3, characterized in that at least two sets of baking pieces are arranged in the box body (31), and the baking pieces are positioned on two sides of the pole piece (7) to bake the pole piece (7).
5. The pole piece roll die cutting device according to claim 3, wherein the heating assembly (32) comprises an electric heating tube and the air blowing assembly (33) comprises a fan.
6. The pole piece roll-in die-cutting device according to claim 5, characterized in that the heating assembly (32) comprises a heat generating body which is arranged to extend along the transport direction of the pole piece (7).
7. A pole piece rolling die-cutting device according to claim 1, characterized in that said first roll assembly (1) comprises a first upper roll and a first lower roll, which roll said pole piece (7).
8. A pole piece rolling die-cutting device according to claim 1, characterized in that said second roll assembly (2) comprises a second upper and a second lower roll, which roll said pole piece (7).
9. The pole piece roll die-cutting device according to claim 1, characterized in that it further comprises a support assembly for supporting the pole piece (7), which is arranged on the transmission path of the pole piece (7).
10. The pole piece roll die-cutting device according to claim 1, characterized in that it further comprises a take-up reel, which is arranged on the transmission path of the pole piece (7) and downstream of the die-cutting assembly (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120521508.1U CN214813994U (en) | 2021-03-12 | 2021-03-12 | Pole piece rolling and die cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120521508.1U CN214813994U (en) | 2021-03-12 | 2021-03-12 | Pole piece rolling and die cutting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214813994U true CN214813994U (en) | 2021-11-23 |
Family
ID=78885226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120521508.1U Active CN214813994U (en) | 2021-03-12 | 2021-03-12 | Pole piece rolling and die cutting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214813994U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116533004A (en) * | 2023-07-04 | 2023-08-04 | 江苏时代新能源科技有限公司 | Cutting device, battery manufacturing production line and processing method of pole piece material belt |
-
2021
- 2021-03-12 CN CN202120521508.1U patent/CN214813994U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116533004A (en) * | 2023-07-04 | 2023-08-04 | 江苏时代新能源科技有限公司 | Cutting device, battery manufacturing production line and processing method of pole piece material belt |
| CN116533004B (en) * | 2023-07-04 | 2024-03-08 | 江苏时代新能源科技有限公司 | Cutting device, battery manufacturing production line and processing method of pole piece material belt |
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