CN103657983A - Vortex heating coating machine drying box - Google Patents
Vortex heating coating machine drying box Download PDFInfo
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- CN103657983A CN103657983A CN201310697628.7A CN201310697628A CN103657983A CN 103657983 A CN103657983 A CN 103657983A CN 201310697628 A CN201310697628 A CN 201310697628A CN 103657983 A CN103657983 A CN 103657983A
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- coating
- drying box
- pole piece
- eddy current
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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 invention provides a vortex heating coating machine drying box. Vortex coils (3-2) and a roller carrier roller (3-3) are arranged in the drying box. The vortex coils (3-2) are located in the middle upper position inside the drying box, and the roller carrier roller (3-3) is horizontally arranged in the middle lower position inside the drying box. The roller carrier roller (3-3) carries and transmits a coating pole piece (A), the coating pole piece (A) is dragged into the drying box through traction of a rolling part (4) after being coated through a coating part (2), and the coating pole piece (A) is carried and transmitted through the roller carrier roller (3-3), penetrates through the middle of the drying box and is rolled into a roll on an outlet of the drying box through the rolling part (4). The plurality of vortex coils (3-2) are evenly arranged above the coating pole piece (A) and generate an alternating magnetic field after being powered on, copper foil or aluminum foil of the coating pole piece (A) located below the vortex coils (3-2) generates heat so that the temperature can rise and solvents in lithium ion battery positive electrode or negative electrode active material pulp with which the copper foil or the aluminum foil is coated can be evaporated.
Description
Technical field
The present invention relates to a kind of lithium ion battery manufacturing equipment, particularly a kind of coating machine drying box.
Background technology
In lithium ion battery manufacturing equipment, rationally whether coating machine drying box technology, very outstanding to the quality of be coated with pole piece coating and effectiveness affects.The dry object of electrodes of lithium-ion batteries coating is that the organic solvent 1-METHYLPYRROLIDONE in coating paste or aqueous solvent evaporation are shifted away, makes the coating of pole piece dry.
The slurry that existing coating machine adopts large flow to add hot-air and pole piece coating carries out convection current and radiant heat exchange, makes the solvent in pole piece coating paste obtain the rising of heat temperature, reaches the object of solvent evaporation.Dry run is, the top layer of the coating wind waved that is first heated, and heat transfer type is to conduct to internal layer from top layer, internal layer is to copper foil of affluxion body or aluminium foil conduction.This heat transfer type makes the solvent preferential evaporation on cell size top layer, causes top layer skinning; After the top layer skinning of coating forms, the liquid phase proportion in the top layer of coating lowers, and solid-state phase proportion increases, and mass-and heat-transfer coefficient is tending towards lowering, and the solvent evaporation difficulty of internal layer is increased, and has caused the bad pole piece coating of " the dry flesh of skin is wet ".The bad pole piece coating of " the dry flesh of skin is wet ", the sheet operation of rolling of Xia road manufacturing process is very easy to occur that coating stratiform comes off, and has a strong impact on product quality.With this simultaneously, due to the liquid phase proportion attenuating in top layer of coating, solid-state phase proportion increases, mass-and heat-transfer coefficient is tending towards reducing, add capacity usage ratio in hot-air and reduce, cause energy waste, this is the outstanding large problem of energy consumption in existing lithium ion battery manufacturing technology.
Research shows, the dry run of Coating is to conduct heat and the recombination process of mass transfer, conducts heat and refers to the transmittance process of heat energy from high temperature to low temperature place, and heat transfer comprises conduction, radiation, convection type.Mass transfer refers to solvent or molecule from the diffusion process of high concentration side direction low concentration side.Heat transfer and mass transfer have determined dry run efficiency, also can affect product quality.
The dry run of coating, the difference according to rate of drying, is divided into three phases, and the first, the temperature rise period, input energy, be the stage that coating obtains heat energy.Existing coating machine is to be undertaken by electrical heating air and Coating convection current and radiation mode.
The second, the constant rate of drying stage, that is, liquid solvent is heated, and forms evaporating pressure evaporation, and with this simultaneously, solvent strength and ambient concentration in coating are poor, forms concentration difference diffusion.This stage is heated in stable state, and the heat and mass of coating, in stable condition, belongs to the constant rate of drying stage.
The 3rd, the rate of drying decline stage.Along with the solvent minimizing of coating, liquid phase proportion is more and more lower, and solid-state phase proportion is more next high.Mass-and heat-transfer condition changes along with liquid-solid phase conversion, and liquid phase proportion lowers, and solid-state phase proportion increases, and mass-and heat-transfer coefficient is tending towards lowering, and rate of drying declines.
Prior art with electrical heating air to coating surface convection heat transfer' heat-transfer by convection mode, along with the solvent of coating surface constantly reduces, its heat transfer coefficient constantly lowers, energy utilization coefficient constantly declines, a large amount of electrical heating air cannot conduct heat with coating, cause pole piece coating rate of drying slow, caused energy waste.
Summary of the invention
The defect that the object of the invention is to overcome drying box heating in existing lithium ion battery manufacturing equipment, proposes a kind of eddy current pyrogenicity coating machine drying box.
Principle of the present invention is: according to Faraday's electromagnetic induction law, produce alternating magnetic field during eddy current coil energising work.Metallic conductor in induced electromotive force region, forms induced-current, and this induced-current belongs to eddy current character.Because metallic conductor self exists resistance, so eddy current will produce heat and temperature rise in metallic conductor.Eddy current coil energising operating power is larger, and its metallic conductor will produce heat will be larger, and temperature rise will be higher, utilizes this eddy current effect to act on lithium ion battery coating pole piece.
The structure of lithium ion battery coating pole piece is: metallic conductor Copper Foil or lithium paper tinsel are carrier, and the coating layer of active substance of lithium ion battery is coated metallic conductor Copper Foil or lithium paper tinsel surface.
The heat transfer of drying box of the present invention adopts conduction pattern from the inside to the outside, lithium ion battery coating pole piece is dried from the inside to the outside, overcome existing from top layer the shortcoming to internal layer conduction, undercoating to the heat transfer type of copper foil of affluxion body or aluminium foil conduction, overcome the solvent preferential evaporation on cell size top layer, cause the bad pole piece coating of " the dry flesh of skin is wet " that top layer skinning causes.
The technical solution used in the present invention is as follows.
Lithium ion battery manufacturing equipment coating machine mainly forms by unreeling parts, coating parts, drying box, air inducing blower fan and rolling parts.Unreel parts and be connected with coating parts, the entrance of drying box connects coating parts, and the outlet top of drying box is furnished with air inducing blower fan, and rolling parts are connected with the outlet of drying box.
The function of described coating parts is that the slurry of being prepared by lithium ion battery plus-negative plate active material is coated to copper foil of affluxion body or aluminium foil top layer.The function of described drying box is by the solvent heating evaporation of coating in the lithium ion battery plus-negative plate active material slurry of Copper Foil or aluminium foil, plays dry object.The function of described air inducing blower fan is that the damp steam of coating the solvent heating evaporation in the lithium ion battery plus-negative plate active material slurry of Copper Foil or aluminium foil is drawn to drying box, make the interior space of drying box in a lower solvent strength atmosphere, solvent heating process concentration difference diffusion in favourable slurry, plays the object of accelerating evaporation drying.The described parts that unreel are sent Copper Foil or the aluminium foil coiled strip of the coating pole piece of needs coating into coating parts, the termination of Copper Foil or aluminium foil is fixed on rolling parts, described rolling parts are wound into reel by completing coating coating dry coating pole piece, unreel parts and the synchronous interaction of rolling parts.
In described drying box, be furnished with eddy current coil and cylinder carrying roller.Some cover eddy current coils are positioned at place, upper position in the middle of drying box, some cover cylinder carrying rollers horizontally disposed in drying box in the middle of position on the lower.
Cylinder carrying roller support also transmits coating pole piece, and coating pole piece is pulled drying box into by the traction of rolling parts after the coating of coating parts, and by cylinder carrying roller support transmission, coating pole piece, through the middle part of drying box, is wound into reel in drying box exit by rolling parts.The top of coating pole piece is evenly arranged a plurality of eddy current coils.Copper foil of affluxion body or aluminium foil are after coating parts coating lithium ion battery plus-negative plate active material slurry, form coating pole piece, coating pole piece is pulled drying box into through rolling parts tractions, and coating pole piece is through the middle part of drying box, in drying box exit by rolling parts winding drum.Eddy current coil is above coating.Cylinder carrying roller is below coating pole piece, and support also transmits coating pole piece, avoids Copper Foil or the stressed deformation causing of aluminium foil deadweight.
The casing of described drying box is made of heat-barrier material and steel plate.
During described eddy current coil energising work, produce alternating magnetic field, the Copper Foil of the coating pole piece in eddy current coil below or aluminium foil form induced-current in induced electromotive force region.Because Copper Foil or aluminium foil self exist resistance, eddy current will produce heat and temperature rise in Copper Foil or aluminium foil, to coating the solvent heating in the lithium ion battery plus-negative plate active material slurry of Copper Foil or aluminium foil; Solvent is heated rear evaporation, and the solvent of evaporation is drawn outside drying box by air inducing blower fan; In drying box, keep the lower atmosphere of solvent strength, in lasting eddy heating for heating effect, coating pole piece is dried.The dry process of coating pole piece is heat exchange pattern from the inside to the outside, and lithium ion battery coating pole piece is dried from the inside to the outside.
Described eddy current coil is comprised of around cylinder ferrite conductor loop.When wire is switched on, it is ferritic axially that magnetic induction line direction is positioned at cylinder, and electric current and electric current excite relation between the magnetic induction line direction in magnetic field to meet right-hand screw rule.
When described eddy current coil is switched on, the axial of eddy current coil is magnetic induction line direction, coating pole piece is positioned at the axial below of eddy current coil, axially the arranging in opposite directions with coating pole piece of eddy current coil, with the axial coating pole piece region in opposite directions of eddy current coil be alternating magnetic field induction region.
Compared with prior art, electrical heating air is to Coating convection heat transfer' heat-transfer by convection mode, and cross-ventilation heat transfer coefficient λ is 0.023～0.06W/m
2℃, being improved to copper foil of affluxion body or aluminium foil to Coating conduction heat transfer, liquid is 0.1～0.7W/m to solid heat transfer coefficient lambda
2℃, by improving heat-transfer mechanism, significantly improve heat transfer coefficient, more make full use of the energy, play and save energy meaning; After improving, heat transfer drying mode has been avoided the bad pole piece coating of " the dry flesh of skin is wet ", has improved lithium ion battery product quality.
Accompanying drawing explanation
Fig. 1 is eddy current pyrogenicity coating machine drying principles schematic diagram of the present invention, in figure, and 3-2 eddy current coil, A coating pole piece;
Fig. 2 is eddy current pyrogenicity coating machine drying box structural representation of the present invention, and in figure, 1 unreels parts, 2 coating parts, 3 drying boxes, 3-1 air inducing blower fan, 4 rolling parts, A coating pole piece;
Fig. 3 is eddy current pyrogenicity coating machine drying box partial sectional view of the present invention, in figure, and A coating pole piece, 3-2 eddy current coil, 3-3 cylinder carrying roller, 3-4 heat insulating box;
Fig. 4 is the eddy current coil structural representation of eddy current pyrogenicity coating machine drying box of the present invention, in figure, and 4-1 cylinder ferrite, 4-2 wire.
Fig. 5 is Fig. 2 D-D cutaway view, in figure, and A coating pole piece, 3-2 eddy current coil, 3-3 cylinder carrying roller, 3-4 heat insulating box;
Fig. 6 is E-E cutaway view of Fig. 5, in figure, and 3-2 eddy current coil, 3-4 heat insulating box.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
As shown in Figure 2, lithium ion battery manufacture key equipment coating machine mainly forms by unreeling parts 1, coating parts 2, drying box 3, air inducing blower fan 3-1 and rolling parts 4.
Unreel parts 1 and be connected with coating parts 2, the entrance of drying box 3 connects coating parts 2, and the outlet that the outlet top of drying box 3 is furnished with air inducing blower fan 3-1, drying box 3 connects rolling parts 4.
As shown in Figure 3, in described drying box 3, be furnished with eddy current coil 3-2 and cylinder carrying roller 3-3.As shown in Figure 3, Figure 5 and Figure 6, cylinder carrying roller 3-3 horizontally disposed in the interior centre of drying box 3 position on the lower, cylinder carrying roller 3-3 support also transmits coating pole piece A, coating pole piece A pulls drying box into by 4 tractions of rolling parts after 2 coatings of coating parts, by cylinder carrying roller 3-3 support transmission, coating pole piece A is through the middle part of drying box, in drying box exit by rolling parts
4be wound into reel.Coating pole piece A top is evenly arranged some cover eddy current coil 3-2.
Described copper foil of affluxion body that parts 1 adopt lithium ion battery plus-negative plate pole piece or the aluminum foil coiled material of unreeling sent in an orderly manner coating parts 2 and is coated with.
Described coating parts 2 are coated copper foil of affluxion body or aluminium foil top layer by the slurry of being prepared by lithium ion battery plus-negative plate active material, form coating pole piece A.
Described drying box 3 use heat-barrier materials and steel plate are made, and its function is the solvent in the lithium ion battery plus-negative plate active material slurry that is coated with of heating evaporation coating pole piece, with dry coating pole piece.Described air inducing blower fan 3-1 draws drying box 3 by the damp steam of coating the solvent heating evaporation in the lithium ion battery plus-negative plate active material slurry of Copper Foil or aluminium foil, make drying box 3 interior in a lower solvent strength atmosphere, solvent heating process concentration difference diffusion in favorable activity material slurry, plays the object of accelerating evaporation drying.
Described rolling parts 4 are by the coating pole piece A reel rolling of drying.
Described heat insulating box 3-3 is by heat-barrier material glass fibre or rock wool and steel plate is compound forms, preferred rock wool, and the inside and outside two sides of heat insulating box 3-3 is steel plate, filler rock wool between two-layered steel plates.
Described eddy current coil 3-2 produces alternating magnetic field while switching on work, the Copper Foil of coating pole piece A in the bottom or aluminium foil are in induced electromotive force region, form induced-current, owing to there is resistance in Copper Foil or aluminium foil self, eddy current will produce heat and temperature rise in Copper Foil or aluminium foil, temperature rise is to coating the solvent heating in the lithium ion battery plus-negative plate active material slurry of Copper Foil or aluminium foil, solvent is heated rear evaporation, the solvent of evaporation is drawn outside drying box 3 by air inducing blower fan 3-1, the lower environment of the interior maintenance solvent strength of drying box 3, in lasting eddy heating for heating effect, coating pole piece A is dried.
Described cylinder carrying roller 3-3 support also transmits Copper Foil or aluminium foil continuously, avoids Copper Foil or the stressed deformation causing of aluminium foil deadweight.
As shown in Figure 4, eddy current coil 3-2 consists of around cylinder ferrite 4-1 wire 4-2.When wire 4-2 switches on, magnetic induction line direction be positioned at cylinder ferrite 4-1 axially, electric current and electric current excite relation between the magnetic induction line direction in magnetic field to meet right-hand screw rule.
As shown in Figure 1, during eddy current coil 3-2 energising, eddy current coil 3-2's is axially magnetic induction line direction, coating pole piece A is positioned at the axial below of its eddy current coil 3-2, eddy current coil 3-2 axially arranges in opposite directions with coating pole piece A, and the axial coating pole piece a-quadrant in opposite directions of eddy current coil 3-2 is alternating magnetic field induction region.
Claims (3)
1. an eddy current pyrogenicity coating machine drying box, is characterized in that, is furnished with eddy current coil (3-2) and cylinder carrying roller (3-3) in described drying box; Some cover eddy current coils (3-2) are positioned at place, upper position in the middle of drying box, some cover cylinder carrying rollers (3-3) horizontally disposed in drying box in the middle of position on the lower; Cylinder carrying roller (3-3) support also transmits coating pole piece (A), coating pole piece (A) is pulled drying box into by rolling parts (4) traction after coating parts (2) coating, by cylinder carrying roller (3-3) support transmission, coating pole piece (A), through the middle part of drying box, is wound into reel in drying box exit by rolling parts (4); The top of coating pole piece (A) is evenly arranged a plurality of eddy current coils (3-2).
2. eddy current pyrogenicity coating machine drying box according to claim 1, it is characterized in that, described eddy current coil (3-2) consists of around cylinder ferrite (4-1) wire (4-2): when wire (4-2) is switched on, magnetic induction line direction is positioned at the axial of cylinder ferrite (4-1); Coating pole piece (A) is positioned at axially below of eddy current coil (3-2), with eddy current coil (3-2) axially coating pole piece (A) region be in opposite directions alternating magnetic field induction region.
3. eddy current pyrogenicity coating machine drying box according to claim 1, is characterized in that, the casing of described drying box (3-4) is by glass fibre or rock wool and steel plate is compound forms, and fills rock wool between two-layered steel plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697628.7A CN103657983A (en) | 2013-12-18 | 2013-12-18 | Vortex heating coating machine drying box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697628.7A CN103657983A (en) | 2013-12-18 | 2013-12-18 | Vortex heating coating machine drying box |
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| Publication Number | Publication Date |
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| CN103657983A true CN103657983A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310697628.7A Pending CN103657983A (en) | 2013-12-18 | 2013-12-18 | Vortex heating coating machine drying box |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111787649A (en) * | 2020-05-22 | 2020-10-16 | 广东日禾电器有限公司 | Preparation method of quick-heating slurry |
| CN112038633A (en) * | 2019-06-03 | 2020-12-04 | 万向一二三股份公司 | Silicon-carbon negative electrode binder of lithium ion battery, negative electrode plate and preparation method |
| US12000795B2 (en) | 2019-08-16 | 2024-06-04 | Lg Energy Solution, Ltd. | Eddy current sensor having improved crack detection capability, and eddy current inspection device including same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202048756U (en) * | 2011-05-16 | 2011-11-23 | 汕头市新青罐机有限公司 | High frequency induction drying device |
| CN102824984A (en) * | 2011-06-16 | 2012-12-19 | 赵宽 | Coating internal heat drying method lithium ion battery pole piece coater |
| CN202667107U (en) * | 2012-06-12 | 2013-01-16 | 东莞新能源科技有限公司 | Oven device of coating machine |
| CN202700767U (en) * | 2012-05-31 | 2013-01-30 | 钟智帆 | Drying oven for heating and drying device of battery pole piece double-sided coating machine |
-
2013
- 2013-12-18 CN CN201310697628.7A patent/CN103657983A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202048756U (en) * | 2011-05-16 | 2011-11-23 | 汕头市新青罐机有限公司 | High frequency induction drying device |
| CN102824984A (en) * | 2011-06-16 | 2012-12-19 | 赵宽 | Coating internal heat drying method lithium ion battery pole piece coater |
| CN202700767U (en) * | 2012-05-31 | 2013-01-30 | 钟智帆 | Drying oven for heating and drying device of battery pole piece double-sided coating machine |
| CN202667107U (en) * | 2012-06-12 | 2013-01-16 | 东莞新能源科技有限公司 | Oven device of coating machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038633A (en) * | 2019-06-03 | 2020-12-04 | 万向一二三股份公司 | Silicon-carbon negative electrode binder of lithium ion battery, negative electrode plate and preparation method |
| US12000795B2 (en) | 2019-08-16 | 2024-06-04 | Lg Energy Solution, Ltd. | Eddy current sensor having improved crack detection capability, and eddy current inspection device including same |
| CN111787649A (en) * | 2020-05-22 | 2020-10-16 | 广东日禾电器有限公司 | Preparation method of quick-heating slurry |
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Application publication date: 20140326 |