CN212857122U - Rolling production equipment for preventing lithium ion battery pole piece from breaking - Google Patents
Rolling production equipment for preventing lithium ion battery pole piece from breaking Download PDFInfo
- Publication number
- CN212857122U CN212857122U CN202021639522.3U CN202021639522U CN212857122U CN 212857122 U CN212857122 U CN 212857122U CN 202021639522 U CN202021639522 U CN 202021639522U CN 212857122 U CN212857122 U CN 212857122U
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- China
- Prior art keywords
- stretching
- pole piece
- lithium ion
- ion battery
- battery pole
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- 238000005096 rolling process Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 239000011888 foil Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000009966 trimming Methods 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000005336 cracking Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- 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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- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model discloses a rolling production device for preventing the breakage of a lithium ion battery pole piece, which comprises an unreeling mechanism, a trimming mechanism, a heating pre-stretching mechanism, a rolling mechanism and a reeling mechanism in sequence according to the moving direction of the pole piece; the heating pre-stretching mechanism comprises a heater and pre-stretching rollers on two sides of the heater; both ends of the pre-stretching roller are provided with pre-stretching pieces for extruding and stretching the foil in the tab area; the utility model discloses a prestretch the regional foil of utmost point ear, produce the fracture when preventing that the pole piece from crossing the roller.
Description
Technical Field
The utility model relates to a lithium ion battery production technical field especially relates to a prevent cracked rolling production facility of lithium ion battery pole piece.
Background
In the manufacturing process of the conventional lithium battery lamination process, continuous coating is mainly adopted, and then the pole piece is rolled. The rolling structure mainly comprises a discharging mechanism, a material receiving mechanism, a deviation rectifying mechanism, a tension mechanism and a rolling mechanism. The working principle of rolling is that the non-rolled pole piece after coating is subjected to deviation correction and tension control through a discharging mechanism, is rolled through a rolling mechanism, and is finally rolled.
The current roll-in structure is at pole piece roll-in-process, the material through the roll-in can produce the extension, because the ductility in pole piece coating district and the ductility of utmost point ear department foil have very big difference, pole piece coating district extension is far greater than the foil extension, lead to roll-in back pole piece coating district and utmost point ear district handing-over department to produce the extrusion, the difference of horizontal ductility leads to the unable release of the extrusion effect of this department, the pole piece of the final juncture of continuous roll-in can be crisp, fracture often when passing the roller, just can't use after the pole piece fracture, thereby very big promotion manufacturing cost.
Disclosure of Invention
An object of the utility model is to provide a prevent cracked rolling production facility of lithium ion battery pole piece, this utility model prestretch the regional foil of utmost point ear, prevent that the pole piece from producing the fracture when crossing the roller.
For solving the technical problem, the technical proposal of the utility model is that: a rolling production device for preventing a lithium ion battery pole piece from being broken sequentially comprises an unreeling mechanism, a trimming mechanism, a heating pre-stretching mechanism, a rolling mechanism and a reeling mechanism according to the moving direction of the pole piece;
the heating pre-stretching mechanism comprises a heater and pre-stretching rollers on two sides of the heater;
the two ends of the pre-stretching roller are provided with pre-stretching pieces for extruding and stretching the foil in the pole ear area.
Preferably, the pre-tensioning element is sleeve-shaped. The utility model discloses a set up the structure that the piece that prestretches of cover tube-shape obtained the symmetry, easy to assemble prestretches the piece to the size change of different battery models.
In a further improvement, the pre-stretching piece is provided with a transition section and an extrusion section in sequence towards one end of the pre-stretching roller. The utility model discloses prestretch and still need guarantee the foil simultaneously and follow the stability after the follow-up roll-in, consequently set up and prestretch the piece and be equipped with a changeover portion, prestretch the foil part and do not prestretch and set up a buffer segment between the foil of part, do benefit to foil and the complete protection of pole piece structure.
It is further preferred that the thickness of the transition section of the pre-tensioning element is smaller than the thickness of the extruded section. The utility model discloses a set up stage formula thickness and effectively protect pole piece and foil.
In a further improvement, the joint of the transition section and the extrusion section of the same pre-stretching piece is in a round corner structure. The utility model discloses the foil is effectively protected with the fillet structure of extrusion section to the changeover portion, prevents that it from taking place non-ductility deformation, influences the battery quality.
In a further improvement, a press roller is arranged above the pre-stretching roller close to one side of the rolling mechanism. The utility model discloses a compression roller cooperation is prestretched the roller and is prestretched the foil through the heater heating, and tensile effect is showing, and the percentage of elongation reaches 0.01% to 0.07%.
By adopting the technical scheme, the beneficial effects of the utility model are that:
the utility model respectively carries out stretching deformation at room temperature and after heating aiming at the foil in the tab area before rolling through the pre-stretching rollers at the two sides of the heater, thereby ensuring effective stretching; the utility model assists the stretching of the empty foil area, the rolled pole piece and the foil can have certain stretching, the extrusion effect at the boundary is reduced, and the pole piece is prevented from being broken when passing through the roller;
the utility model discloses change the different edge foil district that prestretches the piece and roll up the utmost point according to utmost point ear foil district width and stretch, to the battery of different models, change not unidimensional prestretching piece, the utility model discloses use in a flexible way.
Thereby achieving the above object of the present invention.
Drawings
Fig. 1 is a schematic structural diagram of a rolling production facility for preventing a lithium ion battery pole piece from cracking according to the present invention;
FIG. 2 is a perspective view of the pre-stretching roll of the present invention;
fig. 3 is a front view of the pretensioning element according to the invention.
In the figure:
an unwinding mechanism 1; the trimming mechanism 2; heating the pre-stretching mechanism 3; a heater 31; a pre-stretching roller 32; a pre-tensioning element 33; a transition section 331; a pressing section 332; a press roll 34; a rolling mechanism 4; and a winding mechanism 5.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
The embodiment discloses rolling production equipment for preventing a lithium ion battery pole piece from being broken, which comprises an unwinding mechanism 1, a trimming mechanism 2, a heating pre-stretching mechanism 3, a rolling mechanism 4 and a winding mechanism 5 in sequence according to the moving direction of the pole piece as shown in fig. 1 to 3; the heating prestressing mechanism 3 includes a heater 31 and prestressing rollers 32 on both sides of the heater 31; both ends of the pre-stretching roller 32 are provided with pre-stretching elements 33 that squeeze and stretch the foil in the pole ear regions. In the embodiment, foil in the tab area before rolling is stretched and deformed at room temperature and after heating by the pre-stretching rollers 32 on the two sides of the heater 31 respectively, so that effective pre-stretching is ensured; in the embodiment, the stretching of the empty foil area is assisted, the rolled pole piece and the rolled foil can be stretched to a certain extent, the extrusion effect at the boundary is reduced, and the pole piece is prevented from being broken when passing through a roller;
the different pre-stretching pieces 33 are replaced according to the width of the tab foil area to stretch the edge foil area of the electrode roll, the pre-stretching pieces 33 with different sizes are replaced according to different types of batteries, and the usage is flexible.
The pre-tensioning element 33 is in this embodiment sleeve-shaped. The embodiment obtains a symmetrical structure by providing the sleeve-like pre-tensioning element 33, facilitates installation, and facilitates replacement of the pre-tensioning element 33 for different battery models.
The pretensioning element 33 is in this embodiment provided with a transition section 331 and a pressing section 332 in sequence in the direction of one end of the pretensioning roller 32. In the embodiment, the foil needs to be ensured to be stable after being rolled in the subsequent process, so that the pre-stretching piece 33 is provided with a transition section 331, and a buffer section is arranged between the pre-stretched foil part and the foil without the pre-stretched part, so that the foil and the pole piece are protected in a complete structure.
The transition section 331 of the pre-tensioning element 33 in this embodiment has a smaller thickness than the extruded section 332. This embodiment is through setting up stage formula thickness effective protection pole piece and foil.
In this embodiment, the junction between the transition section 331 and the pressing section 332 of the pre-stretching element 33 is a rounded structure. The fillet structure of this embodiment changeover portion 331 and extrusion section 332 effectively protects the foil, prevents that it from taking place non-malleable deformation, influences the battery quality.
In this embodiment, a press roll 34 is also provided above the pre-stretching roll 32 on the side close to the rolling mechanism 4. In the embodiment, the foil heated by the heater 31 is stretched by the compression roller 34 in cooperation with the pre-stretching roller 32, the stretching effect is remarkable, and the extensibility reaches 0.01% to 0.07%.
The specific working mode of this embodiment is as follows: after the pole pieces sequentially pass through the unreeling mechanism 1 and the trimming mechanism 2, foil of the pole lugs is firstly contacted with a pre-stretching roller 32, stretched by a pre-stretching piece 33 under tension and then enters a heater 31, and after the heated foil is stretched under the combined action of the pre-stretching roller 32 and a pressing roller 34 again, the pole pieces enter a rolling mechanism 4 and a reeling mechanism 5.
The above embodiments and drawings are not intended to limit the forms and modes of the present embodiments, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present embodiments.
Claims (7)
1. The utility model provides a prevent cracked rolling production facility of lithium ion battery pole piece which characterized in that: the device sequentially comprises an unwinding mechanism, a trimming mechanism, a heating pre-stretching mechanism, a rolling mechanism and a winding mechanism according to the moving direction of a pole piece;
the heating pre-stretching mechanism comprises a heater and pre-stretching rollers on two sides of the heater;
the two ends of the pre-stretching roller are provided with pre-stretching pieces for extruding and stretching the foil in the pole ear area.
2. The rolling production equipment for preventing the lithium ion battery pole piece from cracking as claimed in claim 1, wherein: the pre-tensioning element is sleeve-shaped.
3. The rolling production equipment for preventing the lithium ion battery pole piece from cracking as claimed in claim 2, wherein: the thickness of the pre-tensioning element is 300 to 500 μm.
4. The rolling production equipment for preventing the lithium ion battery pole piece from cracking as claimed in claim 2, wherein: the pre-stretching piece is provided with a transition section and an extrusion section in sequence towards one end of the pre-stretching roller.
5. The rolling production equipment for preventing the lithium ion battery pole piece from cracking as claimed in claim 4, wherein: the thickness of the transition section of the pre-stretching element is smaller than that of the extruded section.
6. The rolling production equipment for preventing the lithium ion battery pole piece from cracking as claimed in claim 5, wherein: the joint of the transition section and the extrusion section of the same pre-stretching piece is of a round angle structure.
7. The rolling production equipment for preventing the lithium ion battery pole piece from cracking as claimed in any one of claims 1 to 6, wherein: and a press roller is also arranged above the pre-stretching roller close to one side of the rolling mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021639522.3U CN212857122U (en) | 2020-08-07 | 2020-08-07 | Rolling production equipment for preventing lithium ion battery pole piece from breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021639522.3U CN212857122U (en) | 2020-08-07 | 2020-08-07 | Rolling production equipment for preventing lithium ion battery pole piece from breaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212857122U true CN212857122U (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021639522.3U Active CN212857122U (en) | 2020-08-07 | 2020-08-07 | Rolling production equipment for preventing lithium ion battery pole piece from breaking |
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| Country | Link |
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| CN (1) | CN212857122U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709371A (en) * | 2022-03-11 | 2022-07-05 | 上海兰钧新能源科技有限公司 | Pole piece stretching device and stretching method thereof |
-
2020
- 2020-08-07 CN CN202021639522.3U patent/CN212857122U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709371A (en) * | 2022-03-11 | 2022-07-05 | 上海兰钧新能源科技有限公司 | Pole piece stretching device and stretching method thereof |
| CN114709371B (en) * | 2022-03-11 | 2024-05-28 | 上海兰钧新能源科技有限公司 | Pole piece stretching device and stretching method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230412 Address after: 226001 room 16010, building 21 (22), No. 1692, Xinghu Avenue, development zone, Nantong City, Jiangsu Province Patentee after: Nantong saide Energy Co.,Ltd. Address before: 213000 No.2 Hongyang Road, Tianning District, Changzhou City, Jiangsu Province Patentee before: Changzhou saide Energy Technology Co.,Ltd. |
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Effective date of registration: 20240325 Granted publication date: 20210402 |
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Date of cancellation: 20240521 Granted publication date: 20210402 |
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Effective date of registration: 20240621 Address after: Room 402-1, Door 5, Building 2, No. 6 Zhuyuan Road, Huayuan Industrial Zone, Binhai New Area, Tianjin, 300000 Patentee after: Tianjin Guangcaiweiye Technology Co.,Ltd. Country or region after: China Address before: 226001 room 16010, building 21 (22), No. 1692, Xinghu Avenue, development zone, Nantong City, Jiangsu Province Patentee before: Nantong saide Energy Co.,Ltd. Country or region before: China |