CN210880825U - Auxiliary cooling system for wet lithium battery diaphragm casting sheet - Google Patents
Auxiliary cooling system for wet lithium battery diaphragm casting sheet Download PDFInfo
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- CN210880825U CN210880825U CN201921695350.9U CN201921695350U CN210880825U CN 210880825 U CN210880825 U CN 210880825U CN 201921695350 U CN201921695350 U CN 201921695350U CN 210880825 U CN210880825 U CN 210880825U
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- cooling
- chill roll
- oil
- roller
- lithium battery
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- 238000001816 cooling Methods 0.000 title claims abstract description 83
- 238000005266 casting Methods 0.000 title claims abstract description 22
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000008676 import Effects 0.000 claims abstract description 4
- 239000000498 cooling water Substances 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- -1 polytetrafluoroethylene Polymers 0.000 claims 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims 1
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 1
- 229920002635 polyurethane Polymers 0.000 claims 1
- 239000004814 polyurethane Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000005238 degreasing Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 102000004310 Ion Channels Human genes 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model discloses a supplementary cooling system of piece is cast to wet process lithium cell diaphragm relates to including the cooling bath, casts the piece die head, 1# chill roll, 2# chill roll, 3# chill roll, 4# chill roll, 5# chill roll, 6# squeeze roll, 7# deoiling roller, 8# deoiling roller, the scraper, casts the piece, condenser tube, the import of cooling bath oil, the export of cooling bath oil, the import of condenser tube, the export of condenser tube, extension tray. The utility model discloses a synchronous use of white oil and chill roll in the cooling bath can ensure that the inside and outside both sides of the cast sheet that the die head was extruded obtain unanimous cooling effect, and similar appearance, and do not introduce impurity such as water. The cooling tank can collect white oil dropped during the cooling and forming of the casting sheet for reuse, and the resource utilization rate is improved.
Description
Technical Field
The invention relates to the technical field of wet-process lithium battery diaphragm production, in particular to a wet-process lithium battery diaphragm casting auxiliary cooling system.
Background
The diaphragm plays a role in separating the anode and the cathode in the charge and discharge process of the lithium ion battery, preventing the two electrodes from contacting and short-circuiting, absorbing enough electrolyte, providing enough electrolyte lithium ion channels, having a micropore self-closing protection function and the like. The lithium ion conductivity of the separator is directly related to the overall performance of the lithium ion battery, and the performance of the separator determines the interface structure of the battery, the retentivity of electrolyte, the internal resistance of the battery and the like, so that the important characteristics of the battery, such as capacity, cycle performance, charge-discharge current density, safety and the like, are influenced.
Existing wet separator manufacturing methods generally include: batching and casting → bidirectional stretching → extraction → transverse stretching → rolling inspection. As the cast slab is dosed, a cast slab of molten mass exits the die. The existing process is that after a cast sheet is extruded, the cast sheet is cooled on one side by attaching a chill roll or is additionally provided with a water tank, and the cast sheet passes through the water tank and is cooled in a water cooling mode. In this way, two problems can exist: 1. the cooling speed of the two sides of the cast piece can not be consistent by attaching the chilling roller to carry out single-side cooling, so that the surface structures of the cast piece at the inner side and the outer side are different, and the difference of microstructures of the inner surface and the outer surface of the diaphragm after stretching is caused; 2. water cooling is carried out through a water tank, a non-raw material substance, namely water, is introduced, and the appearance defect of corrugation is easily generated on the surface of the cast sheet meeting water, so that similar defects also exist on the surface of the stretched diaphragm.
In view of this, it is particularly important in the field of wet lithium ion battery separator production to design and manufacture an auxiliary cooling system for a wet lithium ion battery separator cast piece.
Disclosure of Invention
In view of the above-mentioned disappearance, the utility model provides a supplementary cooling system of wet process lithium cell diaphragm casting, this system can be used to the cooling of the casting in the diaphragm manufacturing process, guarantees that casting both sides cooling rate is stable and unanimous to do not introduce new material, thereby improve diaphragm surface appearance, promote product market competition.
The utility model provides a technical problem can adopt following technical scheme now:
the utility model provides a supplementary cooling system of piece is cast to wet process lithium cell diaphragm, relates to including the cooling bath, casts piece die head, 1# chill roll, 2# chill roll, 3# chill roll, 4# chill roll, 5# chill roll, 6# squeeze roll, 7# deoiling roller, 8# deoiling roller, the scraper blade, casts the piece, condenser tube, the oil inlet of cooling bath, the oil outlet of cooling bath, the condenser tube import, the condenser tube export, extension tray.
Further, the cooling tank is arranged below the cast sheet die head, the No. 1 chill roll and the No. 5 chill roll.
Furthermore, one side of the cooling groove, which is close to the cast sheet die head, is provided with a cooling groove oil inlet, the bottom of the cooling groove is provided with a cooling groove oil outlet, and one side of the cooling groove, which is far away from the cast sheet die head, is provided with a lengthened tray.
Furthermore, the cooling water pipe is arranged in the cooling tank, the inlet of the cooling water pipe is arranged below the same side of the oil inlet of the cooling tank, and the outlet of the cooling water pipe is arranged below the same side of the lengthened tray.
Furthermore, the No. 7 oil removal roller, the No. 8 oil removal roller and the oil scraping knife are sequentially arranged above the No. 1 chill roller.
Further, the No. 2 chill roll, the No. 3 chill roll and the No. 4 chill roll are sequentially arranged in the advancing direction of the cast sheet.
The utility model provides a supplementary cooling system of wet process lithium cell diaphragm casting piece has following beneficial effect:
the utility model provides a supplementary cooling system of wet process lithium cell diaphragm casting piece, when using, cool off white oil in to the cooling bath through external mould temperature machine, the chill roll that deuterogamies carries out the heat transfer with the casting piece, guarantees the uniformity of casting piece inside and outside, ensures the outward appearance uniformity of diaphragm. The white oil attached to the chill roll can be removed by using the oil removing roll and the scraper. The use of the lengthened tray can collect white oil dripping from the casting piece at the cooling rear section and recycle the white oil to the cooling tank again, thereby reducing the waste of the white oil and improving the utilization rate of resources.
Drawings
For clearer explanation, the technical scheme and the beneficial effects of the embodiment of the present invention are clearer, the present invention provides the following drawings for explanation:
fig. 1 is a schematic structural diagram of a wet-process lithium battery separator casting auxiliary cooling system according to an embodiment of the present invention;
icon: 1-a cooling tank; 2-a sheet casting die head; 3-1# chill roll; 4-2# chill roll; 5-3# chill roll; 6-4# chill roll; 7-5# chill roll; 8-6# squeeze roll; 9-7# oil removing roller; 10-8# oil removing roller; 11-a scraper; 100-casting a sheet; 110-cooling water pipes; 111-cooling bath oil inlet; 112-cooling tank oil outlet; 113-cooling water pipe inlet; 114-cooling water pipe outlet; 115-lengthening the tray.
Detailed Description
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
Referring to fig. 1, the auxiliary cooling system for a wet lithium battery separator cast sheet provided in this embodiment includes a cooling tank 1; a cast sheet die head 2; 1# chill roll 3; 2# chill roll 4; a # 3 chill roll 5; 4# chill roll 6; 5# chill roll 7; 6# squeeze roll 8; 7# degreasing roller 9; 8# degreasing roller 10; a scraper 11; a cast sheet 100; a cooling water pipe 110; a cooling tank oil inlet 111; a cooling bath oil outlet 112; a cooling water pipe inlet 113; a cooling water tube outlet 114; the tray 115 is lengthened.
Preferably, cooling tank 1 is disposed below slab die 2, chill roll # 1, and chill roll # 5, 7.
The cooling tank 1 is provided with a cooling tank oil inlet 111 at one side close to the casting sheet die head 2, a cooling tank oil outlet 112 at the bottom and an elongated tray 115 at one side far away from the casting sheet die head 2. The cooling bath oil inlet 111 and the cooling bath oil outlet 112 are connected to an external oil storage device for transferring the white oil in the bath during use and maintenance of the device. The use of the extension tray 115 can collect white oil dropping from the casting piece 100 during the cooling process, and the white oil flows back to the cooling tank 1 to be used as a cooling medium.
The cooling water pipe 110 is arranged in the cooling tank 1 and is connected with an external mold temperature controller through a cooling water pipe inlet 113 and a cooling water pipe outlet 114, so that heat exchange between certain cooling temperature and cooling medium white oil in the cooling tank 1 is ensured. And each chill roll is also internally provided with a coil pipe type cooling runner and connected with an external mold temperature controller to ensure that a certain cooling temperature exchanges heat with the cast sheet.
The cooling water pipe 110 is placed in the cooling tank 1, the cooling water pipe inlet 113 is arranged below the same side of the cooling tank oil inlet 111, and the cooling water pipe outlet 114 is arranged below the same side of the lengthened tray 115. The cast sheet 100 is extruded from the cast sheet die head 2 and is cooled and heat exchanged by a # 1 chill roll 3, a # 2 chill roll 4, a # 3 chill roll 5 and a # 4 chill roll 6 in sequence.
And a 7# degreasing roller 9, an 8# degreasing roller 10 and an oil scraper 11 are sequentially arranged above the 1# chill roller 3. The white oil adhered to the No. 1 chill roll can be completely scraped by the matching use of the oil removing roll 9 and the oil scraping knife 11, and the removed white oil can be dropped into the cooling tank 1 to be continuously used as a cooling medium.
In the prior art, the temporary non-chill roll is provided with an oil-system auxiliary cooling device, and the invention has the advantages of simple structure, strong practicability and high cost performance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can also find the technical solutions and concepts of the present invention to be equivalent to the replacement or improvement, etc. within the technical scope of the present invention.
Claims (8)
1. The auxiliary cooling system for the wet lithium battery diaphragm cast sheet is characterized by comprising a cooling tank (1), a cast sheet die head (2), a 1# chilling roller (3), a 2# chilling roller (4), a 3# chilling roller (5), a 4# chilling roller (6), a 5# chilling roller (7), a 6# squeeze roller (8), a 7# oil removing roller (9), an 8# oil removing roller (10), an oil scraping knife (11), a cast sheet (100), a cooling water pipe (110), a cooling tank oil inlet (111), a cooling tank oil outlet (112), a cooling water pipe inlet (113), a cooling water pipe outlet (114) and a lengthened tray (115), wherein the cooling tank (1) is arranged below the cast sheet die head (2), the 1# chilling roller (3) and the 5# chilling roller (7), one side of the cooling tank (1) close to the cast sheet die head (2) is provided with the cooling tank oil inlet (111), and the bottom of the cooling tank oil outlet (112) is arranged at the bottom, keep away from cast piece die head (2) one side and have extension tray (115), cooling water pipe (110) place in cooling bath (1), cooling water pipe import (113) set up in cooling bath oil inlet (111) homonymy below, cooling water pipe export (114) set up in extension tray (115) homonymy below, 7# remove oiling roller (9), 8# remove oiling roller (10), oil scraper (11) set gradually in 1# chill roll (3) top, cast piece (100) extrude by cast piece die head (2), 1# chill roll (3), 2# chill roll (4), 3# chill roll (5) and 4# chill roll (6) place in cast piece (100) direction of advance in proper order.
2. The auxiliary cooling system for the diaphragm casting of the wet lithium battery as claimed in claim 1, wherein the cooling tank (1) is filled with white oil liquid which is injected through a cooling tank oil inlet (111) and is consistent with the raw material for manufacturing the diaphragm, and the cooling tank (1) can be emptied through a cooling tank oil outlet (112) during later maintenance.
3. The wet lithium battery separator cast sheet auxiliary cooling system as claimed in claim 1, wherein the extension tray (115) has a slope of 5 ° -10 °.
4. The auxiliary cooling system for the wet lithium battery diaphragm casting piece is characterized in that the cooling water pipe (110) is made of a thin-wall copper pipe with the thickness of 0.5mm, and an inlet (113) and an outlet (114) of the cooling water pipe are respectively connected with an external mold temperature controller.
5. The auxiliary cooling system for the wet lithium battery diaphragm cast piece is characterized in that the 1# chill roll (3), the 2# chill roll (4), the 3# chill roll (5), the 4# chill roll (6) and the 5# chill roll (7) are all provided with inner wall coil pipe runner structures, and water cooling and heat exchange are carried out on the cast piece by connecting an external mold temperature controller.
6. The auxiliary cooling system for the wet lithium battery diaphragm casting piece is characterized in that the surfaces of the No. 6 squeezing roller (8), the No. 7 oil removing roller (9) and the No. 8 oil removing roller (10) are made of polyurethane materials.
7. The auxiliary cooling system for the wet lithium battery separator cast piece as claimed in claim 1, wherein the scraper (11) is made of polytetrafluoroethylene.
8. The auxiliary cooling system for the wet lithium battery separator cast piece according to claim 7, wherein the length of the oil scraper (11) is wider than that of the # 1 chill roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921695350.9U CN210880825U (en) | 2019-10-11 | 2019-10-11 | Auxiliary cooling system for wet lithium battery diaphragm casting sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921695350.9U CN210880825U (en) | 2019-10-11 | 2019-10-11 | Auxiliary cooling system for wet lithium battery diaphragm casting sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210880825U true CN210880825U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921695350.9U Active CN210880825U (en) | 2019-10-11 | 2019-10-11 | Auxiliary cooling system for wet lithium battery diaphragm casting sheet |
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| Country | Link |
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| CN (1) | CN210880825U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112216927A (en) * | 2020-09-28 | 2021-01-12 | 常州星源新能源材料有限公司 | Lithium ion battery diaphragm and production process thereof |
| CN113561398A (en) * | 2021-07-22 | 2021-10-29 | 九江冠力新材料有限公司 | Chilling system device for eliminating bright spots of appearance defects of lithium battery diaphragm |
| CN114188657A (en) * | 2021-11-11 | 2022-03-15 | 乐凯胶片股份有限公司 | Lithium battery diaphragm casting cooling method and system and application thereof |
| CN114759310A (en) * | 2022-04-22 | 2022-07-15 | 中材锂膜有限公司 | Wet process lithium cell is deoiling system for diaphragm |
| CN118493821A (en) * | 2024-07-18 | 2024-08-16 | 天津华恒新材料股份有限公司 | Cast sheet device for BOPP film |
-
2019
- 2019-10-11 CN CN201921695350.9U patent/CN210880825U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112216927A (en) * | 2020-09-28 | 2021-01-12 | 常州星源新能源材料有限公司 | Lithium ion battery diaphragm and production process thereof |
| CN113561398A (en) * | 2021-07-22 | 2021-10-29 | 九江冠力新材料有限公司 | Chilling system device for eliminating bright spots of appearance defects of lithium battery diaphragm |
| CN114188657A (en) * | 2021-11-11 | 2022-03-15 | 乐凯胶片股份有限公司 | Lithium battery diaphragm casting cooling method and system and application thereof |
| CN114759310A (en) * | 2022-04-22 | 2022-07-15 | 中材锂膜有限公司 | Wet process lithium cell is deoiling system for diaphragm |
| CN114759310B (en) * | 2022-04-22 | 2023-05-23 | 中材锂膜有限公司 | Oil removal system for wet lithium battery diaphragm |
| CN118493821A (en) * | 2024-07-18 | 2024-08-16 | 天津华恒新材料股份有限公司 | Cast sheet device for BOPP film |
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