CN102824984A - Coating internal heat drying method lithium ion battery pole piece coater - Google Patents
Coating internal heat drying method lithium ion battery pole piece coater Download PDFInfo
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- CN102824984A CN102824984A CN 201110175711 CN201110175711A CN102824984A CN 102824984 A CN102824984 A CN 102824984A CN 201110175711 CN201110175711 CN 201110175711 CN 201110175711 A CN201110175711 A CN 201110175711A CN 102824984 A CN102824984 A CN 102824984A
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Abstract
The invention provides a technical scheme improving present coater heat transmission modes and overcoming defects of present coater coating drying modes and copper foil pretreatment lack, and provides a coating internal heat drying method lithium ion battery pole piece coater. The coater comprises a copper coil unreeling cylinder, a tension adjusting stick, a copper coil guide roller, a copper coil, a coating pole piece, a constant temperature heating box, a slurry tank, a main roller, a comma stick, a back stick, a hot stick, gas spraying ovens, a pole piece reeling cylinder, a pole piece tension balancing stick, a pole piece guide roller, a rack and the like. The coater enables a coating technology to comprise water removal and preheating before the coating of the copper coil, and the transmission mode between the copper coil and the battery slurry coating to be improved to overcome an adverse pole piece coating defect of dry surface and wet internal existing in present coaters.
Description
Technical field
The present invention relates to heated drying method electrodes of lithium-ion batteries coating machine in a kind of the lithium ion battery manufacturing technology, particularly coating.
Background technology
In the lithium ion battery manufacturing process, both positive and negative polarity pole piece coating process is crucial link, and the disturbing factor of coating process is very complicated, finds in the practice that commaterial is at same coating machine; Different coating qualities can appear in the different time sections operation, and production process is also found, different environment humidity; Can make copper foil surface attachment of moisture amount different, the different environment temperature can make coating pole piece water capacity different, with batch main and auxiliary material; Coating adhesion difference appears in same operation, causes these problem reasons relevant with existing coating machine defective, and existing coating machine does not contain amount of moisture identification and control to base material before coating, because Copper Foil specific heat is little; The airborne moisture that is easy to condense is when copper foil surface condenses one deck moisture when promptly being coated with, obviously; Influenced the contact combination of cell size with copper foil surface, and moisture compares with organic solvent NMP in the cell size, its evaporating temperature is high; More difficulty is evaporated away from the Copper Foil top layer, has influenced the coating dry mass, has also just influenced the adhesive force of coating and Copper Foil; In addition, because Copper Foil specific heat is little, relative temperature is lower; And cell size always is in ceaselessly stirring, stirs acting and makes the temperature of cell size be tending towards ascendant trend, promptly; The temperature that has formed cell size is higher than the Copper Foil temperature, when the Copper Foil that is lower than cell size contacts with cell size, occurs the cell size condensation easily; In case generation condensation, the adhesive that was in dispersity originally just form and disperse irregularly, disperseing irregular is one of reason of influencing coating quality.
Secondly, there is the heat transfer type defective in the drying means of existing coating machine, the coating machine dry run; Be that the wind of being heated earlier of the top layer of coating is stroked, heat transfer type is to conduct to internal layer from the top layer, interior course Copper Foil conduction; Heat transfer type like this makes the solvent preferential evaporation on cell size top layer, causes the top layer skinning; After the top layer skinning forms, the solvent evaporation difficulty of internal layer is increased, caused the wet bad pole piece coating of the dried flesh of skin; The bad pole piece coating that the dried flesh of skin is wet is rolled the sheet operation at Xia Dao and is very easy to occur the coating stratiform and comes off, and improves existing coating machine heat transfer type; Before improving coating Copper Foil being carried out removing immediately water treatment, is to improve the electrodes of lithium-ion batteries important channel.
Summary of the invention
The present invention will provide a kind of improvement existing coating machine heat transfer type; Overcome the defective of existing coating machine coating drying mode; Have coating machine removes the defective of water treatment immediately to Copper Foil before coating technical scheme now with overcoming; Provide heated drying method electrodes of lithium-ion batteries coating machine in a kind of coating, coating process is dewatered, preheating before coating to Copper Foil; And improve Copper Foil and cell size coating heat transfer type, overcome the defective of the bad pole piece that the dried flesh of skin that existing coating machine exists wets.
Realize technical scheme of the present invention, avoid the surface to have moisture in order to make Copper Foil, in the Copper Foil porch of coating machine rack constent temperature heater is installed, constent temperature heater is provided with a Copper Foil passage; After Copper Foil gets into this passage, by the hot plate heater that is distributed in the Copper Foil two sides in the constent temperature heater two sides of Copper Foil is heated simultaneously, Copper Foil is heated its surperficial moisture of back and promptly is heated evaporation, the cell size condensation can not take place in order to make Copper Foil get into coating cell size hopper district; Need with Copper Foil further heating make its temperature rise, make the copper foil surface temperature be higher than the cell size temperature, in the constent temperature heater exit hot rod is installed, flow in the surface that Copper Foil is attached to hot rod; Make the Copper Foil heating, back of the body rod is installed in hot rod top, and back of the body rod and main rod are pressed close to install; The comma rod is installed in main rod top, and main rod is pressed close to the slurry tank installation, and heated Copper Foil promptly gets into the coating of hopper district once leaving hot rod; At this moment, the Copper Foil that is higher than the cell size temperature heats cell size, after cell size is heated; Adhesive ingredients in the cell size will further dissolve, and can not be lower than cell size because of the Copper Foil temperature, and two phase materials are once contact; Make the adhesive ingredients generation condensation in the cell size, the coating pole piece after coating gets into jet baking oven, and jet baking oven connects rack and installs; Can make the coating pole piece arrive the thermal treatment zone of jet baking oven fast, jet baking oven is the sections structure, jet baking oven actual needs sections quantity; According to the increase and decrease of production capacity size, production capacity greatly then needs more more piece, and the pole piece deflector roll is installed in jet baking oven exit successively; Pole piece equalization of strain rod, pole piece rolling tube, through the pole piece of super-dry by the rolling of pole piece rolling tube.
In order to make the coating pole piece not produce skinning at the coating surface of the starting stage of dry run hygrometric state, need satisfy coating heat exchange pattern from inside to outside, improve existing coating machine dry run and be the top layer wind of being heated earlier and stroke; Heat transfer type is inwardly to conduct from the top layer, and such heat transfer type makes the solvent preferential evaporation on cell size top layer; Cause the top layer skinning, after the top layer skinning forms, the solvent evaporation difficulty of internal layer is increased; Caused the wet bad pole piece coating of the dried flesh of skin,, must make heat transfer type according to from inside to outside heat exchange pattern in order to overcome the wet bad phenomenon of the dried flesh of skin; Make the inner solvent preferential evaporation of coating,, air blast is installed in the bottom of jet baking oven in order to realize heat exchange pattern from inside to outside; The blower export direction is installed the baking oven heater, and jet microwell plate is installed in baking oven heater top, and box air flue is installed in jet microwell plate top; Box air flue top is an exhaust outlet, when the coating pole piece has got into baking oven, just blows bottom surface one side that is sprayed on the coating pole piece from the thermal current of jet microwell plate; And coating is on Copper Foil, and thermal current preferentially makes the Copper Foil heating, and Copper Foil is again to being in contact with it the finishing coat heating; The suitable heater to coating paste of Copper Foil this moment has so just reached heat conduction purpose from inside to outside, has also just reached the solvent preferential evaporation of coating near copper foil layer; Avoided the wind of being heated earlier on top layer to stroke, the solvent evaporation on preferential top layer causes the wet bad pole piece coating of the dried flesh of skin; In order to make Copper Foil ability thermally equivalent, the micropore of jet microwell plate needs evenly to distribute, and the aperture of micropore need be less than 2mm; The pitch of holes of micropore is less than 25mm, and the top of jet microwell plate is box air flue, and the top of box air flue is an exhaust outlet; Discharge through exhaust outlet from the solvent gas that contains of coating evaporation, mix, reduced jet microwell plate blow gas temperature owing to blow out hot gas with jet microwell plate from the damp steam of coating evaporation; The temperature of box air flue is lower than the temperature between coating pole piece and the jet microwell plate, and the both sides temperature remains temperature difference, makes heating evaporation heat exchange pattern from inside to outside keep stable process.
The baking oven heater adopts Steam Heating, or electrical heating.
In order to make Copper Foil before getting into coating, eliminate surface moisture; The Copper Foil two sides is heated evenly; Permanent steady heater constitutes the Copper Foil passage by upper and lower two hot plate heaters, and upper and lower two hot plate heaters are installed in the casing of upper and lower two case covers; The hot plate heater adopts Steam Heating, or electrical heating.
For Copper Foil can better be combined with cell size when being coated with, condensation takes place when avoiding cell size to contact with Copper Foil, it is to adopt hot rod Contact Heating mode that Copper Foil is further heated; The radially overcoat of hot rod is the rod cover, pours into conduction oil between rod cover inwall and the ring heater, and ring heater is with heat-conducting oil heating; Conduction oil is with the heating of rod cover; Ring heater is installed on rotating shaft radially, and ring heater adopts Steam Heating, or electrical heating.
The base material that uses in the production of lithium ion battery coating pole piece comprises also that except using Copper Foil the employing aluminum foil material as the pole piece base material, uses aluminium foil suitable equally in the present technique scheme as base material.
The positive effect of technical scheme of the present invention
Heated drying method electrodes of lithium-ion batteries coating machine in the coating; Improved existing coating machine heat transfer type; Remove the technical scheme of the defective of water treatment before the heat transfer defective that overcomes existing coating machine coating drying mode and the Copper Foil coating, provide the interior heated drying method electrodes of lithium-ion batteries coating machine of a kind of coating, coating process is dewatered to Copper Foil before coating; Preheating; And improve Copper Foil and cell size coating heat transfer type, make its defective that overcomes the bad pole piece coating that dried flesh of skin that existing coating machine exists wets, improved the product quality of lithium ion battery.
Description of drawings
Fig. 1 is a heated drying method electrodes of lithium-ion batteries coating machine structural representation in the coating of the present invention;
Among Fig. 1, Copper Foil unreels a 1-1, tension adjustment rod 1-2, Copper Foil deflector roll 1-3, Copper Foil 2-1, coating pole piece 2-2, permanent steady heating cabinet 3, slurry tank 4, main rod 5, comma rod 6, back of the body rod 7, hot rod 8, jet baking oven 9, pole piece rolling tube 10-1, pole piece equalization of strain rod 10-2, pole piece deflector roll 10-3, rack 11, Copper Foil inlet 11-1;
Fig. 2 is the structural representation of jet baking oven 9;
Among Fig. 2, air blast 9-1, baking oven heater 9-2, jet microwell plate 9-3, box air flue 9-4, exhaust outlet 9-5, coating pole piece 2-2;
Fig. 3 is constent temperature heater 3 structural representations;
Among Fig. 3, case cover 3-1, hot plate heater 3-2, Copper Foil 2-1;
Fig. 4 is hot rod 8 structural representations;
Among Fig. 4, rod cover 8-1, conduction oil 8-2, ring heater 8-3, rotating shaft 8-4, Copper Foil 2-1;
Specific embodiment
With reference to Fig. 1, the Copper Foil of rack 11 inlet 11-1 installs constent temperature heater 3 in the place, and hot rod 8 is installed in permanent steady heater 3 outlets; Back of the body rod 7 is installed in hot rod 8 tops; Back of the body rod 7 is pressed close to install with main rod 5, and comma rod 6 is installed in main rod 5 tops, and main rod 5 is pressed close to slurry tank 4 and installed; The jet baking oven 9 of four joints connects rack 11 and installs; Jet baking oven 9 actual needs quantity are according to the increase and decrease of production capacity size, and production capacity greatly then needs more more piece, and jet baking oven 9 exits are installed pole piece deflector roll 10-3, pole piece equalization of strain rod 10-2, pole piece rolling tube 10-1 successively;
With reference to Fig. 2; Air blast 9-1 is installed in bottom, the air blast 9-1 Way out of jet baking oven 9 baking oven heater 9-2, the jet microwell plate 9-3 of baking oven heater 9-2 top installation, the box air flue 9-4 of jet microwell plate 9-3 top installation is installed, and box air flue 9-4 top is exhaust outlet 9-5;
With reference to Fig. 3, upper and lower two hot plate heater 3-2 of permanent steady heater 3 cover installation by upper and lower two case cover 3-1 respectively;
With reference to Fig. 4, the radially overcoat of hot rod 8 is rod cover 8-1, perfusion conduction oil 8-2 between rod cover 8-1 and the ring heater 8-3, and ring heater 8-3 is installed on rotating shaft 8-4 radially;
Method for using: lithium ion battery negative material is contained into slurry tank 4, and Copper Foil 2-1 unreels a 1-1 from Copper Foil and makes the test, and the footpath sagging gravity of tension adjustment rod 1-2 is regulated the tension force of Copper Foil 2-1; Copper Foil deflector roll 1-3 in footpath gets into permanent steady heating cabinet 3, again around hot rod 8 then; Through main rod 5, promptly coat the lithium ion battery negative material coating, coating layer thickness is by regulating gap decision between comma rod 6 and the main rod 5; The Copper Foil 2-1 that coats the lithium ion battery negative material coating is coating pole piece 2-2, and coating pole piece 2-2 gets into jet baking oven 9 through pole piece rolling tube 10-1 rolling traction, and the top of coating pole piece 2-2 is that lithium ion battery negative material coating below is naked of a Copper Foil 2-1 material; Or the dry coating coated of preceding working procedure, coating pole piece 2-2 below is bloated through the jet microwell plate 9-3 ejection in baking oven heater 9-2 heated air stream footpath by air blast 9-1, and the heating surface of coating pole piece 2-2 is naked of a Copper Foil 2-1 material; Or the dry coating face coated of preceding working procedure; Heat conducts to new coating and Copper Foil 2-1 material binder course from Copper Foil 2-1 material, therefore through conduction; Coating is to coating surface from interior heat; New coating and Copper Foil 2-1 material land temperature are higher than the new coating outer surface, so just avoid the new coating outer surface to receive hot solvent evaporation skinning earlier, because the buoyancy of jet microwell plate 9-3 gaseous blast; Coating pole piece 2-2 is to float flow regime in box air flue 9-4; So just avoided the dry coating that preceding working procedure coated and the sassafras damage that rubs of old-fashioned coating machine transmission deflector roll, Copper Foil 2-1 removes moisture through permanent steady heating cabinet 3 preheatings before main rod 5 applies getting into, again through overheated rod 8 heating; It is hot that Copper Foil 2-1 is in when combining with cell size; Can avoid cell size to be condensed like this, through to the preheating of Copper Foil 2-1 with improve the quality that coating pole piece 2-2 heat exchange pattern can effectively improve coating pole piece 2-2, thereby improve the lithium ion battery product quality.
Claims (6)
1. the interior heated drying method electrodes of lithium-ion batteries coating machine of coating mainly locates to install permanent steady heater (3) by the Copper Foil inlet (11-1) of rack (11); Hot rod (8) is installed in permanent steady heater (3) outlet; Back of the body rod (7) is installed in hot rod (8) top; Back of the body rod (7) and the tangent installation of main rod (5); Comma rod (6) is installed in main rod (5) top, and main rod (5) is pressed close to slurry tank (4) jet baking oven (9) connection rack (11) installation is installed; Jet baking oven (9) exit is installed pole piece deflector roll (10-3), pole piece equalization of strain rod (10-2), pole piece rolling tube (10-1) composition successively, and it is characterized in that: upper and lower two hot plate heaters (3-2) of constent temperature heater (3) are installed between upper and lower two case covers (3-1).
2. it is characterized in that by heated drying method electrodes of lithium-ion batteries coating machine in the described coating of claim 1: air blast (9-1) is installed in jet baking oven (9) bottom; Air blast (9-1) Way out is installed baking oven heater (9-2); Jet microwell plate (9-3) is installed in baking oven heater (9-2) top; Box air flue (9-4) is installed in jet microwell plate (9-3) top, and box air flue (9-4) top is exhaust outlet (9-5).
3. it is characterized in that by heated drying method electrodes of lithium-ion batteries coating machine in the described coating of claim 2: baking oven heater (9-2) is a kind of for electric heater, steam heater.
4. it is characterized in that by heated drying method electrodes of lithium-ion batteries coating machine in the described coating of claim 1: hot plate heater (3-2) is a kind of for electric heater, steam heater.
5. it is characterized in that by heated drying method electrodes of lithium-ion batteries coating machine in the described coating of claim 1: ring heater (8-3) is a kind of for electric heater, steam heater.
6. it is characterized in that by heated drying method electrodes of lithium-ion batteries coating machine in the described coating of claim 2: the aperture≤2mm of jet microwell plate (9-3) micropore, the pitch of holes≤25mm of micropore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110175711 CN102824984A (en) | 2011-06-16 | 2011-06-16 | Coating internal heat drying method lithium ion battery pole piece coater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110175711 CN102824984A (en) | 2011-06-16 | 2011-06-16 | Coating internal heat drying method lithium ion battery pole piece coater |
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| CN102824984A true CN102824984A (en) | 2012-12-19 |
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| CN 201110175711 Pending CN102824984A (en) | 2011-06-16 | 2011-06-16 | Coating internal heat drying method lithium ion battery pole piece coater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545534A (en) * | 2013-09-24 | 2014-01-29 | 北京鼎能开源电池科技股份有限公司 | Lithium ion battery negative electrode structure and manufacturing method thereof |
| CN103657983A (en) * | 2013-12-18 | 2014-03-26 | 中国科学院电工研究所 | Vortex heating coating machine drying box |
| CN110892558A (en) * | 2018-01-16 | 2020-03-17 | 株式会社Lg化学 | Slitting apparatus and method for secondary battery |
| CN112774880A (en) * | 2019-11-06 | 2021-05-11 | 耿晋 | Air nozzle structure, battery pole piece drying method and drying device |
| CN114824170A (en) * | 2022-04-28 | 2022-07-29 | 珠海冠宇电池股份有限公司 | Pole piece and coating method and coating device thereof |
-
2011
- 2011-06-16 CN CN 201110175711 patent/CN102824984A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545534A (en) * | 2013-09-24 | 2014-01-29 | 北京鼎能开源电池科技股份有限公司 | Lithium ion battery negative electrode structure and manufacturing method thereof |
| CN103545534B (en) * | 2013-09-24 | 2016-08-10 | 北京鼎能开源电池科技股份有限公司 | A kind of lithium ion battery negative electrode structure and manufacture method thereof |
| CN103657983A (en) * | 2013-12-18 | 2014-03-26 | 中国科学院电工研究所 | Vortex heating coating machine drying box |
| CN110892558A (en) * | 2018-01-16 | 2020-03-17 | 株式会社Lg化学 | Slitting apparatus and method for secondary battery |
| CN110892558B (en) * | 2018-01-16 | 2022-11-25 | 株式会社Lg新能源 | Notching apparatus and method for secondary battery |
| US11581520B2 (en) | 2018-01-16 | 2023-02-14 | Lg Energy Solution, Ltd. | Notching apparatus and method for secondary battery |
| CN112774880A (en) * | 2019-11-06 | 2021-05-11 | 耿晋 | Air nozzle structure, battery pole piece drying method and drying device |
| CN114824170A (en) * | 2022-04-28 | 2022-07-29 | 珠海冠宇电池股份有限公司 | Pole piece and coating method and coating device thereof |
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Application publication date: 20121219 |