CN104871360A - Device and method for producing lithium ion secondary battery - Google Patents
Device and method for producing lithium ion secondary battery Download PDFInfo
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- CN104871360A CN104871360A CN201380066009.6A CN201380066009A CN104871360A CN 104871360 A CN104871360 A CN 104871360A CN 201380066009 A CN201380066009 A CN 201380066009A CN 104871360 A CN104871360 A CN 104871360A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Secondary Cells (AREA)
Abstract
Provided is a device for producing a lithium ion secondary battery that comprises at least: a coating unit that applies an electrode material slurry containing an active material for a positive electrode or a negative electrode, a binder, a solidification agent, and a first solvent to the surface of a current collector foil (15); a solidification chamber (18) that brings a solidification liquid (24) into contact with the coating film (22) that has been applied to the surface of the current collector foil (15) and solidifies the coating film (22); and a drying chamber that removes a liquid component contained in the coating film (22) that has solidified in the solidification chamber (18) and dries the coating film (22). The solidification chamber (18) is provided with a spray nozzle (23) that sets the contact width of the solidification liquid (24) along a direction that is orthogonal to the conveyance direction of the current collector foil (15) to be greater than the width of the coating film (22) that is applied to the surface of the current collector foil (15) and within a current collector tab attachment position of the current collector foil (15).
Description
Technical field
The present invention relates to the manufacturing technology of lithium rechargeable battery, the effective technology that the battery lead plate being particularly applicable to lithium rechargeable battery manufactures.
Background technology
As the background technology of technical field of the present invention, there are Japan Patent No. 3953911 publications (patent documentation 1).In this publication, describe " a kind of manufacture method of pellicula; it is the manufacture method of the pellicula of the coating be coated with at least containing active material, binding agent and solvent, has following operation: to be less than the 1st operation of the above-mentioned pellicula of heating temperatures of the above-mentioned solvent boiling point contained by above-mentioned coating; In order to keep the state of the above-mentioned binding agent distribution uniformity in above-mentioned film, with the 2nd operation being less than the above-mentioned pellicula of heating temperatures lower compared with the said temperature of above-mentioned solvent boiling point; And with the 3rd operation of the above-mentioned pellicula of the heating temperatures more than said temperature being less than above-mentioned solvent boiling point, by above-mentioned 3rd operation, above-mentioned pellicula maintains the state making the above-mentioned binding agent distribution uniformity in above-mentioned film through above-mentioned 2nd operation ".
Prior art document
Patent documentation
Patent documentation 1: Japan Patent No. 3953911 publication
Summary of the invention
The problem that invention will solve
Along with the development of mancarried electronic aid, as the electric power supply source of these mancarried electronic aids, use the small-sized secondary batteries that can repeatedly charge.Wherein, lithium rechargeable battery due to have energy density high, have extended cycle life, the low and high such advantage of operating voltage of simultaneously self discharge, be therefore used for the mancarried electronic aids such as digital camera, notebook personal computer, mobile phone.
Further, in recent years, as battery for electric automobile, power storage battery, carrying out realizing high power capacity, height is exporting and the research and development of the large-scale lithium rechargeable battery of high-energy-density.Particularly in automobile industry, in order to response environment problem, carrying out using motor as power source electric automobile, use engine (internal combustion engine) and motor as the exploitation of the hybrid vehicle of power source.Lithium rechargeable battery also receives publicity as the power supply of this electric automobile, hybrid vehicle.Further, lithium rechargeable battery is as effectively utilizing the importance of the purposes such as the power storage of solar power generation, night electricity also to increase gradually.
In lithium rechargeable battery, positive plate and negative plate are carried out reeling or stacked across the dividing plate preventing two battery lead plates from contacting.Then, this coiling body or duplexer are accommodated in after in battery exterior package container, in battery exterior package container, inject electrolyte.
Above-mentioned positive and negative electrode plate manufactures usually by the following method.First, by can be released by discharge and recharge/active material of occlusion lithium ion and the powder of conductive auxiliary agent and adhesive, solvent etc. mixing and make electrode slurry, use the coating means such as mould painting machine using very thin for this slurry, coat as in the metal forming of collector foil equably.Afterwards, by solvent seasoning contained in the slurry (, the coating sizing-agent before drying being designated as coated film below) in metal forming, thus form electrode film, manufacture battery lead plate.
In the manufacture of lithium rechargeable battery as described above, need through comprising the manufacture of pulp-like electrode material, the electrode material in collector foil coating and this series of processes dry or combine these operations to manufacture battery lead plate.But such battery lead plate manufacture needs sizable financial burden, therefore expects to be improved, and expect that the quality for battery lead plate maintains, manages and also improve.
Wherein, in the operation of the coated film of drying electrode material, the battery lead plate good in order to quality bills of materials and in order to ensure fail safe when manufacturing, usually dry cost considerable time, cost.That is, in the drying process of coated film, by with supply the solvent that accompanies of heat to coated film and carry out drying from coated film surface evaporation.But, as everyone knows, if evaporation rate of solvent is now excessive, then can not realize uniform drying in coating face, the composition of the thickness direction of electrode material is uneven, unstable, sometimes produces large burden due to the restriction of drying process to manufacturing equipment.
Therefore, in order to solve the problem, in patent documentation 1, propose the method for the multiple operations being divided into coating temperature different drying process.But in the method, owing to comprising the drying process under low temperature, therefore can not accelerate the rate of drying of electrode, productivity ratio reduces.Further, when by carrying out drying from the surface evaporation solvent of coated film, the uniform concentration distribution making adhesive is not easy.
Point in view of the above problems, the object of the present invention is to provide a kind of by manufacturing the battery lead plate that adhesive distributes roughly equably in electrode film with low cost and while boosting productivity, thus can maintain/improve the manufacture method of battery lead plate quality and manufacturing installation and employ the lithium rechargeable battery of this battery lead plate.
Above-mentioned and other object of the present invention and new feature, clearly demonstrated by the description of this specification and accompanying drawing.
The method of dealing with problems
In order to solve the problem, such as, adopt the formation described in claims.The application comprises multiple solution to the problems described above, enumerates a wherein example, is a kind of manufacturing installation of lithium rechargeable battery,
Have: the coating part pulp-like electrode material at least comprising the active material of positive pole or negative pole, adhesive, curing agent and the 1st solvent being coated collector foil surface; Make consolidation liquid and the above-mentioned pulp-like electrode material contacts coating above-mentioned collector foil surface, thus make the curing room that above-mentioned pulp-like electrode material solidifies; And by the liquid component removing contained by the above-mentioned electrode material that is cured in above-mentioned curing room by the hothouse of above-mentioned electrode material drying,
Above-mentioned curing room has consolidation liquid contact mechanism, and the contact width of the above-mentioned consolidation liquid along the direction vertical with above-mentioned collector foil carriage direction is defined in more than the width of the above-mentioned pulp-like electrode material coating above-mentioned collector foil surface and within the collector plate installation site of above-mentioned collector foil by described consolidation liquid contact mechanism.
Invention effect
For the effect obtained by invention representational in invention disclosed herein, the words of simple declaration are as described below.
The lithium rechargeable battery of high-quality can be manufactured with low cost and while boosting productivity.
Accompanying drawing explanation
Fig. 1 is the overall pie graph of the one side application type electrode plate manufacturing device represented in execution mode.
Fig. 2 is the summary sectional view of the curing room of the electrode plate manufacturing device represented in embodiment 1.
Fig. 3 is the major part plane graph of the collector foil of the spray pattern of the consolidation liquid represented in embodiment 1.
Fig. 4 is the figure of the flow distribution of the consolidation liquid represented in embodiment 1.
Fig. 5 is the summary sectional view of the curing room of the electrode plate manufacturing device represented in embodiment 2.
Fig. 6 (a) is the plane graph of the spraying mask of the curing room of the electrode plate manufacturing device be arranged in embodiment 2, and (b) is the sectional view of this spraying mask.
Fig. 7 (a) is the plane graph of the spraying mask of the curing room of the electrode plate manufacturing device be arranged in embodiment 3, and (b) is the sectional view of this spraying mask.
Fig. 8 is the summary sectional view representing the double spread curing room of drying type electrode plate manufacturing device in the lump.
Fig. 9 is the overall pie graph representing former one side application type electrode plate manufacturing device.
Figure 10 is the overall pie graph of the successively double spread type electrode plate manufacturing device before representing.
Figure 11 is the overall pie graph representing former double spread drying type manufacturing installation in the lump.
Embodiment
Below, embodiments of the present invention are described in detail based on accompanying drawing.In addition, for illustration of in all figure of execution mode, give identical symbol for the component with identical function, its repeat specification is omitted.In addition, in embodiments, except situation about needing especially, the part that not repeat specification is identical or same in principle.Further, in the accompanying drawing that execution mode is described, in order to easy understand is formed, there is the situation that plane graph also adds hatching, sectional view also omits hatching.
First, for the electrode plate manufacturing device of former usual lithium rechargeable battery, use Fig. 9 ~ Figure 11 to be described.
For the formation of the electrode material forming the positive pole of lithium rechargeable battery or the electrode film of negative pole, for by can be released by discharge and recharge/active material of occlusion lithium ion and the powder of conductive auxiliary agent and the adhesive, solvent etc. of these powder that are used for boning be mixing/disperse and the highly viscous slurry shape liquid that obtains.
First, as shown in Figure 9, use and be arranged at the coated components 52 such as the mould painting machine of coating part 51, very thin on the surface of the collector foil 55 supplied by collector foil roller 53, be coated with above-mentioned pulp-like electrode material equably.Then, by for while with the rear-face contact of collector foil 55 while transport the roller delivery system 54 of collector foil 55 with certain speed, the collector foil 55 being coated with pulp-like electrode material (coated film) is delivered in the hot-air drying stove represented with hothouse 56.In hothouse 56, solvent composition contained in heating evaporation coated film and electrode material is dry, forms electrode film on the surface of collector foil 55.Afterwards, collector foil 55 to be wound on electrode roller 57 and to be transported to next operation.In common battery lead plate manufacturing process, respectively such operation is carried out to the surface of collector foil 55 and the back side, thus be manufactured on the two-sided battery lead plate being formed with electrode film of collector foil 55.
In order to use the good battery lead plate of one side application type electrode plate manufacturing device quality bills of materials as described above and guarantee fail safe when manufacturing, the drying cost considerable time of usual coated film, cost.Namely, this is because, in the drying process of coated film, by with supply the solvent that accompanies of heat to coated film and carry out drying from coated film surface evaporation, if but at this moment the evaporation rate of solvent is excessive, then can not realizes uniform drying or become uneven, unstable along the composition of the electrode material of the thickness direction of coated film in coating face.
In addition, in the drying process of above-mentioned manufacturing installation, the travelling speed of collector foil is 1 ~ 100m/ minute degree, is 1 ~ 100 minute degree as observation speed.In the region close to this travelling speed lower limit, because the travelling speed in hothouse is slow, therefore, it is possible to dry under the lower temperature that inhibit evaporation rate of solvent.Therefore, even if small-sized hothouse also can be tackled, and the quality of the battery lead plate manufactured also easily is stablized.
But in the region close to travelling speed lower limit as described above, the productivity ratio that battery lead plate manufactures is low, therefore can become the operation of high price relatively, sometimes also can become for the obstacle by relatively cheap lithium rechargeable battery supply market.
On the other hand, in the region close to the travelling speed upper limit, the productivity ratio that battery lead plate manufactures can be improved, but in order to ensure the quality of battery lead plate for guaranteeing necessary drying time time, hothouse can become very roomy.Therefore, in this case, not only the equipment cost of hothouse self increases, and needs a large amount of heats in order to the large-scale hothouse that operates, and has the problem that operating cost increases.
In addition, in order to improve the productivity ratio of battery lead plate and make hothouse miniaturized and reduce equipment cost and operating cost, the method for dry solvent rapidly is also considered at high temperature.But, in such method, produce following problem: the surface of coated film is first dry, produces the component fluctuation of electrode material in the inside of coated film and surface, or in the generation crack, surface etc. of coated film.
For problem contrary like this, usually by both adjustment at two extreme zone lines, by obtain by rule of thumb just when method construct battery lead plate manufacturing process, equipment.Therefore, require to realize carrying out at a high speed being coated with drying and the electrode plate manufacturing method that can make the stay in grade of battery lead plate.
Successively double spread type electrode plate manufacturing device before Figure 10 represents.Use and be arranged at the coated components 52A such as the mould painting machine of coating part 51A, very thin on the surface of the collector foil 55 supplied by collector foil roller 53, be coated with above-mentioned pulp-like electrode material equably.Then, by the rear-face contact with collector foil 55 while transport the roller delivery system 54A of collector foil 55 with certain speed, the collector foil 55 being coated with pulp-like electrode material is delivered in the hot-air drying stove represented with hothouse 56A.In hothouse 56A, solvent composition contained in heating evaporation coated film and by electrode material dry solidification, form electrode film on the surface of collector foil 55.Series of processes is before this same with the example of Fig. 9.
In the successively double-side type electrode plate manufacturing device shown in Figure 10, unlike the example of Fig. 9, the collector foil 55 being formed with electrode film to be wound on electrode roller 57 but to be transported to next coating part 51B, use coated components 52B, equably coating sizing-agent shape electrode material very thin at the back side of collector foil 55.Then, by the surface contact with collector foil 55 while transport the roller delivery system 54B of collector foil 55 with certain speed, collector foil 55 is delivered in the next hot-air drying stove represented with hothouse 56B.In hothouse 56B, heating evaporation is coated solvent composition contained in the coated film at collector foil 55 back side and by electrode material dry solidification, forms electrode film at the back side of collector foil 55.Thus, the two-sided battery lead plate being formed with electrode film of collector foil 55 is manufactured on.Afterwards, collector foil 55 to be wound on electrode roller 57 and to be transported to next operation.
When so two-sided continuous coating, although the two-sided battery lead plate being formed with electrode film of collector foil can be manufactured on, owing to needing hothouse respectively for each coating, therefore there are the problems such as the manufacturing cost increase of equipment enlarging, battery lead plate.
Figure 11 represents the proposed double spread drying type manufacturing installation in the lump that solves the problem.In the coating part 51 of this manufacturing installation, there is the second coated components 52B at the first coated components 52A of the surperficial coating sizing-agent shape electrode material of collector foil 55 and the backsize pulp-like electrode material in collector foil 55.In this manufacturing installation, use 2 coated components 52A, 52B, on the surface of the collector foil 55 supplied by collector foil roller 53 with the back side is very thin, coating electrode material equably.Then, the solvent composition in the hot-air drying stove represented with hothouse 56 in heating evaporation coated film, by electrode material dry solidification, thus forms electrode film.By such method, the two-sided collector foil 55 being formed with electrode film to be wound on electrode roller 57 and to be transported to next operation.
When so two-sided continuous coating, due to can in the inside of a hothouse 56 film of the simultaneously drying coated electrode material two-sided in collector foil 55, therefore drying equipment can be reduced by half in theory compared with the manufacturing installation of Figure 10, the reduction of equipment cost, operating cost can be expected.
But, in this approach, be difficult in theory utilize the contact shown in Fig. 9, Figure 10 and the roller delivery system of cheapness, the problem therefore how will the collector foil of pulp-like electrode material being had to be transported to hothouse become very large at double spread.Therefore, in the manufacturing installation of Figure 11, adopt the non-contact transport systems 58 such as air suspension delivery system.But such non-contact transport system exists relatively at high price and is also difficult to control the problems such as transport.
As mentioned above, in former manufacture method, adopt and the pulp-like electrode material coating collector foil is directly imported the mode that hothouse carries out drying.
On the other hand, the feature of the manufacture method of present embodiment is, has the curing process be cured before pulp-like electrode material is transported to drying process.By having this curing process, can solve simultaneously pulp-like electrode material is directly carried out the various problems caused by drying by drying process.
Below, about manufacturing installation and the manufacture method of the lithium rechargeable battery of present embodiment, Fig. 1 is used to be described.Fig. 1 is the overall pie graph of the electrode plate manufacturing device of the one side application type representing present embodiment.
In the manufacturing process of the lithium rechargeable battery of present embodiment, first, this electrode material, for the formation of the positive pole of lithium rechargeable battery or the electrode material of negative pole, is filled in the coated components 12 such as the mould painting machine of the coating part 11 being arranged on the electrode plate manufacturing device shown in Fig. 1 by modulation.
About the electrode material of present embodiment, at least comprise and can release the active material powder of the positive pole of occlusion lithium ion or negative pole and conductive auxiliary agent powder according to circumstances by discharge and recharge, comprising the curing agent for making adhesive and the present embodiment bondd between powdered ingredients or between powdered ingredients and collector foil after drying further, using the 1st solvent of present embodiment that these compositions are modulated into highly viscous slurry shape electrode material.In addition, more preferably adhesive ingredients is used as the curing agent of present embodiment.
Then, use and be arranged on the coated components 12 of coating part 11, very thin on the surface of the collector foil 15 supplied by collector foil roller 13, be coated with above-mentioned highly viscous slurry shape electrode material equably.This operation is designated as painting process.
Then, by while be coated with the rear-face contact of collector foil 15 of above-mentioned electrode material while transport the roller delivery system 14 of collector foil 15 with certain speed, collector foil 15 is imported in curing room 18, make the consolidation liquid of the 2nd solvent as present embodiment and the surface contact of coated film, thus coated film is solidified.
As the consolidation liquid of the 2nd solvent of present embodiment, different from the 1st solvent for modulator electrode material, the character of the curing agent do not dissolved contained by electrode material must be had, and there is the character of dissolving each other with the 1st solvent.
When the surface contact of the 2nd solvent and coated film, the 2nd solvent dissolves each other while immerse in coated film with the 1st solvent in coated film.Further, when the concentration of the 2nd solvent in coated film increases, the solubility of curing agent reduces, and therefore curing agent is separated out in coated film, the bondings such as the curing agent of precipitation and the active material particle contained by coated film, coated film integrally curing thus.This operation is designated as curing process.Usually, the process of this solidification is far be shorter than the dry time waiting required time, and the various compositions therefore in coated film are immobilized instantaneously, can not produce their CONCENTRATION DISTRIBUTION, the variation etc. of composition.
Like this, in the inside of above-mentioned curing room 18, carry out the curing process making coated film to be solidified as the consolidation liquid of the 2nd solvent and the surface contact of coated film, but according to the method contacted, worry that the composition in electrode material flows out to the non-coated on collector foil 15 surface.The battery lead plate of common lithium rechargeable battery is installed the collector plate of the electricity that is used for being charged by battery lead plate, export, therefore becomes and do not form electrode film, the state that the two end portions of Width is exposed on the whole surface of collector foil.Therefore, in the present embodiment, be also the whole surperficial coating electrode material not in collector foil in painting process, the two ends of Width are uncoated state.If in this uncoated part, be more specifically attached with electrode material in the installation site of collector plate, then likely the installation of collector plate is bad, resistance between collector foil and collector plate increases, reduce as the characteristic of battery.
In the curing process of present embodiment, in order to make the two ends of the Width of collector foil be uncoated, be provided with the spray nozzle (Fig. 1 is not shown) to the surface spray consolidation liquid of coated film in the inside of curing room 18.In the contact method of consolidation liquid employing spray nozzle, the position can sprayed according to the morphology Control of spray nozzle, amount, therefore can not exceed the installation site of collector plate, and consolidation liquid can be made to contact with coated film.
In the present embodiment, after the curing process in above-mentioned curing room 18, by roller delivery system 14, the collector foil 15 maintaining the coated film of solidification is transported in hothouse 16.Then, by well-known methods such as heated-air dryings, the solvent composition in heating evaporation coated film and electrode material is dry, forms electrode film, thus manufactures the battery lead plate of lithium rechargeable battery on the surface of collector foil 15.This operation is designated as drying process.Afterwards, collector foil 15 to be wound on electrode roller 17 and to be transported to next operation.
Like this, in the present embodiment, owing to coated film being solidified before the drying process of coated film, therefore, it is possible to use the contact roller delivery system 14 contacted with collector foil 15 to transport collector foil 15.That is, in the present embodiment, owing to not needing to use non-contact transport system that is complicated and high price, therefore have employed the cheap hothouse 16 of the roller delivery system 14 using contact.This advantage when by coat the two-sided electrode material of collector foil 15 dry in the lump play extra high effect, certainly, do not get rid of the use of non-contact transport system.
In addition, in the drying process of present embodiment, owing to not being the coated film of dry liquid shape but the drying coated film of solidifying in curing room 18, therefore, it is possible to dry before preventing time change produce the component fluctuation of electrode material, the thickness variation etc. of coated film, and can be dry rapidly at short notice.
According to the feature of such present embodiment, even if when employing the short hothouse of transport path 16, or when employing the fast delivery system of travelling speed, also can not reduce electrode film product quality and making drying equipment miniaturized.That is, the hothouse 16 of the present embodiment shown in Fig. 1 has the structures such as hot-air drying stove in the same manner as the hothouse before shown in Fig. 9 ~ Figure 11, but compared with former hothouse, can shorten the transport path in hothouse.
Below, the composition of the electrode material of the electrode film of the lithium ion battery for the formation of present embodiment is described.
As the positive active material that present embodiment is used, can enumerate cobalt acid lithium, spinel structure containing manganese lithium-contained composite oxide or comprise nickel, cobalt, the composite oxides of manganese or the olivine compounds etc. representated by olivine-type ferric phosphate, but be not limited to these materials.The lithium-contained composite oxide of the spinel structure particularly containing manganese is due to excellent heat stability, therefore, it is possible to the battery that making fail safe is high.
As the active material of positive pole, only can use the lithium-contained composite oxide of the above-mentioned spinel structure containing manganese, also can use with other positive pole active material.As such positive pole active material, include, for example Li
1+xmO
2olivine compounds etc. represented by (-0.1 < x < 0.1, M:Co, Ni, Mn, Al, Mg, Zr, Ti etc.).In addition, as the object lesson of the lithium-containing transition metal oxide of layer structure, except LiCoO
2, LiNi
1-xco
x-yal
yo
2oxide (the LiMn at least comprising Co, Ni and Mn also can be enumerated outside (0.1≤x≤0.3,0.01≤y≤0.2) etc.
1/3ni
1/3co
1/3o
2, LiMn
5/12ni
5/12co
1/6o
2, LiNi
3/5mn
1/5co
1/5o
2deng) etc.
As the negative electrode active material that present embodiment is used, the graphite materials such as native graphite (flaky graphite), Delanium, expanded graphite can be enumerated, burn till pitch and easily graphite voltinism carbonaceous material, easy fired furfuryl alcohol resin (PFA), poly (PPP) and phenolic resins and the material with carbon elements such as difficult graphite voltinism carbonaceous material such as the amorphous carbon that obtains such as the coke that obtains.In addition, in addition to carbon material, lithium, lithium-containing compound also can be used as negative electrode active material.As lithium-containing compound, the lithium alloys such as Li-Al can be enumerated, comprise Si, Sn etc. like that can with the alloy of the element of lithium alloyage.Further, the oxide based material such as Sn oxide, Si oxide can also be used.
Present embodiment conductive auxiliary agent used is typically used as the electrical conductivity auxiliary agent contained by electrode film of positive pole, such as the preferred material with carbon element such as carbon black, acetylene black, Ketjen black, graphite, carbon fiber, carbon nano-tube.In these material with carbon elements, from manufacturing aspect by electrode material paste of the effect of addition and conductivity and coating, particularly preferably acetylene black or Ketjen black.This conductive auxiliary agent also can be included in the electrode film of negative pole, and preferably sometimes also is contained in the electrode film of negative pole.
Present embodiment adhesive used is preferably containing for the adhesive by above-mentioned active material and conductive auxiliary agent bonding.As such adhesive, such as, preferably use Kynoar based polymer (containing the polymer of more than 80 quality % as the fluorochemical monomer group of the vinylidene of main component monomer), rubber-based polymeric thing etc.Two or more kinds may be used for these polymer.In addition, the adhesive that present embodiment is used preferably provides with the solution morphology dissolved in a solvent.
As the fluorochemical monomer group for the synthesis of above-mentioned Kynoar based polymer, the mixture of vinylidene, vinylidene and other monomers can be enumerated and the monomer mixture etc. containing the above vinylidene of 80 quality %.As other monomer above-mentioned, include, for example PVF, trifluoro-ethylene, chlorotrifluoroethylene, tetrafluoroethene, hexafluoropropylene, vinyl ethers etc.In addition, as above-mentioned rubber-based polymeric thing, include, for example styrene butadiene ribber (SBR), ethylene propylene diene rubber, fluorubber etc.
The adhesive that present embodiment is used, can add respectively with the composition had as the performance of curing agent, and adhesive itself also can have the function as curing agent.When adhesive adds respectively with the composition had as the performance of curing agent, adhesive is applicable to using the above-mentioned polymeric material with bonding active material and conductive auxiliary agent character, but need not be dissolving solution morphology in a solvent, also can for being dispersed with the emulsion form of polymeric material in a solvent.
The content of the above-mentioned adhesive in electrode material, using dried electrode film as benchmark, is preferably more than 0.1 quality %, is more preferably more than 0.3 quality % and below 10 quality %, is more preferably below 5 quality %.If the content of adhesive is very few, then have the solidification of the coated film in not only curing process insufficient, and dry after the mechanical strength of electrode film of gained not enough, the problem that electrode film is peeled off from collector foil.On the other hand, if the content of adhesive is excessive, then the amount of the active material in electrode film reduces, and likely battery capacity reduces.
The collector foil that present embodiment is used, is not limited to the paper tinsel of sheet, also can use the paper tinsel etc. using being processed into net, punch metal, foam metal or tabular gained as the simple metal such as aluminium, copper, stainless steel, titanium of its matrix or alloy properties electric conducting material.The thickness of matrix is such as 5 μm ~ 30 μm, is more preferably 8 μm ~ 16 μm.
As the method for pulp-like electrode material in the surface of collector foil coating present embodiment, the various coating processes that to include, for example with extrusion coated machine, reverse roll, scraping blade, applicator etc. be representative.
Suitably choice for use is very important for present embodiment 2 kinds of solvents (the 1st solvent and the 2nd solvent) used.This solvent according to the curing agent of present embodiment or should be also used as the dissolubility of adhesive ingredients of curing agent and the mutual dissolubility of solvent is selected.
As the 1st solvent, the mixed liquor of more than two kinds representative aprotic polar solvent such as 1-METHYLPYRROLIDONE, dimethyl sulfoxide (DMSO), propylene carbonate, dimethyl formamide, gamma-butyrolacton can enumerated or comprise in these materials.In addition, as the 2nd solvent, the mixed liquor of more than two kinds representative protonic solvent such as water, ethanol, isopropyl alcohol, acetic acid can enumerated or comprise in these materials, but be not limited to the example enumerated here.According to circumstances, as the 2nd solvent, sturated aliphatic hydrocarbon, aliphat amine, ester class, ethers, the various solvents of halogen system etc. also can be selected.Further, according to circumstances, exchange the 1st solvent and the 2nd solvent can also be selected.The selective dependency of this solvent is in the selection of electrode film cure component used and the combination of 2 kinds of solvents that meets with it.
The curing room of present embodiment has the consolidation liquid feedway that the consolidation liquid for making to comprise above-mentioned 2nd solvent contacts with the coated film in the collector foil comprising above-mentioned 1st solvent.In addition, this curing room has and makes the contact area of consolidation liquid more than the coating width end in the direction vertical with collector foil carriage direction and consolidation liquid contact mechanism within the collector plate installation site of the non-coated of collector foil.Specifically, being use the spray nozzle being arranged at consolidation liquid feedway, making the mode of consolidation liquid and coated film surface contact, by adjusting kind and the configuration of spray nozzle, thus consolidation liquid only being contacted with above-mentioned spray area.
In addition, above-mentioned curing process is also contained between spray nozzle and coated film and installs spraying mask to control the mode of the contact area of consolidation liquid.Utilize spraying mask to control the mode of the contact area of the consolidation liquid from spray nozzle ejection, compare with the mode configuring to control spray area with the kind by spray nozzle, the control of spray area can be carried out more simply.About the more specifically formation of solidification equipment, clearly demonstrate in embodiment described later.
In the present embodiment, because the adhesive that can not occur in coated film in the drying process after curing process moves, therefore the method for the coated film drying after solidification is not limited to the drying of common warm air.That is, can be irradiate the so electromagnetic mode of heating of infrared ray or far infrared or visible ray, or also can for utilizing the dielectric heating mode of high-frequency electric field.Further, also can use utilize the induction heating mode of magnetic flux change or utilize introduce the warm-up mill of heater, the contact mode of heating of hot plate.
The lithium rechargeable battery that can be provided by present embodiment, except comprising the positive and negative electrode plate that manufactured by said method, can with before lithium rechargeable battery in the same manner as manufacture.That is, for the structure of battery exterior package container of these battery lead plates of storage, size or using the coiling body of positive and negative electrode plate as main composition key element or the structure etc. of duplexer, be not particularly limited.
Above, for while boost productivity while manufacture adhesive roughly equally distributed battery lead plate in electrode film with low cost, thus can maintain/improve the manufacture method of the present embodiment of battery lead plate quality and manufacturing installation is illustrated, below the preferred embodiment for realizing present embodiment is described.
(embodiment 1)
In the present embodiment 1, for according to making the electrode plate manufacturing device being configured with spray nozzle along the mode of contact width more than the width of coated film and within collector plate installation site of the consolidation liquid in the direction vertical with collector foil carriage direction in curing room be described.
As shown in Figure 2, the curing room 18 of the present embodiment 1 is surrounded by metal or plastic outer wall 21, and the transport path of collector foil 15 is provided with the space separated with outside.The collector foil 15 being coated with the coated film 22 of electrode material is imported into spray nozzle 23 by roller delivery system 14, stores solidification flow container 25, the supply pump 26 of consolidation liquid 24, is had in the curing room 18 of waste liquid tank 27.Then, by contacting with the consolidation liquid 24 supplied by spray nozzle 23, coated film 22 is solidified, and transports in next drying device.
As shown in Figure 3, to the spray pattern 33 of consolidation liquid 24 that coated film 22 surface is sprayed, the spray area end of its coated film Width be arranged on collector foil 15 non-coated collector plate installation site 28 compared with more in the inner part.Therefore, the electrode material composition in coated film 22 can not flow out to collector plate installation site 28.
About the shape of spray pattern 33, as long as the spray area end in coating width direction than collector plate installation site 28 more in the inner part, being just not limited to the elliptical shape shown in Fig. 3, can be round-shaped, square shape or the pattern etc. by these combination of shapes.Further, the flow distribution in spray area has impartial flow distribution as shown in Figure 4, becomes the position of 50% flow of spray nozzle 23 centralized traffic more than the end of coated film width.There is the spray area of so impartial flow distribution, can be realized by single-nozzle, also can combine multiple nozzle and realize.By using, there is the spray nozzle 23 of such spray pattern, flow distribution, consolidation liquid can be made to contact equably with coated film surface, the uniformity in direction in the face can improving electrode film.
As the kind of spray nozzle 23, the second fluid nozzle of fluid nozzle and the mixing ejection liquids and gases only spraying liquid can be used.From the view point of the impact alleviated when water contacts with the coated film by spray solidification, the second fluid nozzle of the more fine droplets of preferably can spraying.In addition, by the average grain diameter D50 of the spray particle of spraying from spray nozzle 23 being set to less than 20 μm, being more preferably set to less than 10 μm, coated film defect equivalent damage can be prevented.
As the spray pattern of single-nozzle, according to the nozzle configuration of nozzle, plane pattern, straight-line pattern, full cone pattern etc. can be used.In addition, as flow distribution, when built up nozzle, as long as form the impartial flow distribution shown in Fig. 4, the spray nozzle with various flow distribution such as chevron flow distribution, impartial flow distribution during single-nozzle, can be used.Further, from the view point of the damage to coated film, the spray hits power of per unit area is preferably adjusted to below 5g/cm, is more preferably adjusted to 1g/cm.
Then, each operation related to for the lithium rechargeable battery manufacture of the present embodiment 1 more specifically illustrates.
With regard to positive active material, the nickle cobalt lithium manganate as lithium-transition metal composite oxide can be selected.Using as conductive auxiliary agent powdered graphite and acetylene black, mix with the ratio of mass ratio range 85:8:2:5 with the Kynoar (hereinafter referred to as PVdF) of adhesive of holding concurrently as consolidation liquid, the METHYLPYRROLIDONE successively added further as the 1st solvent is (following, be called NMP), use planetary mixer these compositions mixing and modulate full-bodied anode sizing agent.In anode sizing agent, consolidation liquid adhesive ingredients of holding concurrently is dissolved in NMP.The viscosity using the anode sizing agent of rotary viscosity design determining is about 10Pas.Then, the aluminium foil (positive pole collector foil) of thickness 20 μm, width 200mm use applicator to be coated with mixing anode sizing agent according to the mode of thickness 100 μm, width 150mm.Here, the collector plate installation site in non-coated is apart from coated film end 15mm.
Above operation is the painting process of the surperficial coating sizing-agent shape electrode material in collector foil.Then, the aluminium foil being coated with electrode material is transported in the curing room 18 shown in Fig. 2, to coated film surface spray consolidation liquid, thus electrode material is solidified.Consolidation liquid uses pure water, and spray nozzle uses the second fluid nozzle of internal mix type.The average grain diameter D50 of the spray particle sprayed from this second fluid nozzle is 10 μm.Distance from spray nozzle to coated film is 100mm, and atomisation pressure is set to 0.1MPa, and spray hits power is adjusted to 1g/cm.Spray pattern is the round-shaped of full cone, and spray area diameter is 80mm, and 50% flow region is 70mm.2 these spray nozzles are configured, to coated film surface spray at the Width of coated film.
Above operation is for making to comprise the consolidation liquid of 2nd solvent different from the first solvent contained by electrode material and electrode material contacts and the curing process solidified by electrode material.
Above-mentioned solidification phenomenon refers to: dissolve each other while soak into by the water of spraying attachment with the NMP in coated film, the moisture concentration in coated film rises, and the solubility of the adhesive thus contained by coated film reduces, the phenomenon of precipitation.Utilize the adhesive of separating out, the bonding such as to make between positive pole particle, coated film is solidified.The electrode material of such solidification, without mobility and adherence, remains on aluminium foil, therefore also fully can tolerate the contact Transfer method of contact roller.
Then, the aluminium foil of the coated film maintaining solidification is transported in hothouse, by hot-air drying stove 120 DEG C of dryings 10 minutes, by pure water contained in the coated film of solidification and NMP evaporation removing, manufacture lithium ion secondary battery anode plate.Above operation is removed and the drying process of drying by solvent composition from electrode material.
The composition along thickness direction measuring the positive plate cross section that the present embodiment 1 obtains distributes, and the amount of binder of result aluminium foil side is 5.2%, and face side is 4.4%, the amount of binder many 16% of aluminium foil side.In addition, observe the surface, collector plate installation site of aluminium foil, the result attachment to electrode material unconfirmed.
(embodiment 2)
In the present embodiment 2, spray nozzle is configured with in curing room for the mode of the contact width according to the consolidation liquid along the direction vertical with collector foil carriage direction more than the width of coated film and within collector plate installation site and is described with the electrode plate manufacturing device of spraying mask.
As shown in Figure 5, the curing room 18 of the present embodiment 2 similarly to Example 1, is surrounded by metal or plastic outer wall 21, in the transport path of collector foil 15, is provided with the space separated with outside.The collector foil 15 being coated with the coated film 22 of electrode material is imported into spray nozzle 23 by roller delivery system 14, stores solidification flow container 25, the supply pump 26 of consolidation liquid 24, is had in the curing room 18 of waste liquid tank 27.Then, by contacting with the consolidation liquid 24 supplied by spray nozzle 23, coated film 22 is solidified, and transports in next drying device.
The spray nozzle 23 of the present embodiment 2, the spray nozzle with the same kind described in embodiment 1 can be used, but as different from Example 1, determine spray area by the spraying mask 29 be configured between spray nozzle 23 and roller delivery system 14, be therefore not limited to the shape of spray pattern.
Fig. 6 represents an example of spraying mask.Being provided with the spraying mask 29 of opening at central portion, in order to make excessive consolidation liquid not flow into coated film side, there is the rake 30 that central portion side is high, outer circumferential side is low.In the present embodiment 2, show the example of the rake 30 of linearity, also can be set to the spraying mask 29 on rake 30 with ア ー Le (R).In addition, be provided with for excessive consolidation liquid being expelled to outside drain tank 31 in the periphery of spraying mask 29.By using such spraying mask 29, spray area can be controlled more easily, can prevent electrode material from flowing out to collector plate installation site.
The anode sizing agent that the aluminium foil (positive pole collector foil) of thickness 20 μm, width 200mm uses applicator coating Examples 1 to modulate according to the mode of thickness 100 μm, width 150mm.Here, the collector plate installation site in non-coated is 15mm apart from coated film end.
Then, the aluminium foil being coated with electrode material is transported in the curing room 18 shown in Fig. 2, to coated film surface spray consolidation liquid, thus electrode material is solidified.Consolidation liquid uses pure water, and spray nozzle uses the second fluid nozzle of internal mix type.The average grain diameter D50 of the spray particle sprayed from this second fluid nozzle is 10 μm.Be 100mm from spray nozzle to the distance of coated film, atomisation pressure is set to 0.1MPa, and spray hits power is adjusted to 1g/cm.Spray pattern is the round-shaped of full cone, and spray area diameter is 100mm, and 50% flow region is 80mm.Configure 2 these spray nozzles at the Width of coated film, spraying mask is installed between spray nozzle and coated film, to coated film surface spray.Here, the opening footpath of spraying mask is set to 100mm in coating width direction, is set to 50mm at carriage direction.
Then, the aluminium foil of the coated film maintaining solidification is transported to hothouse, 120 DEG C of dryings 10 minutes in hot-air drying stove, thus by pure water contained in the coated film of solidification and NMP evaporation removing, manufactures lithium ion secondary battery anode plate.
The composition along thickness direction measuring the positive plate cross section that the present embodiment 2 obtains distributes, and the amount of the adhesive of result aluminium foil side is 5.0%, and face side is 4.3%, the amount of binder many 14% of aluminium foil side.In addition, observe the surface, collector plate installation site of aluminium foil, the result attachment to electrode material unconfirmed.
(embodiment 3)
In the present embodiment 3, the electrode plate manufacturing device spraying mask used in embodiment 2 having been installed heater is described.
The curing room 18 of the present embodiment 2, similarly to Example 2, is surrounded by metal or plastic outer wall 21, in the transport path of collector foil 15, is provided with the space separated with outside.Be coated with the collector foil 15 of the coated film 22 of electrode material, be imported into spray nozzle 23 by roller delivery system 14, store solidification flow container 25, the supply pump 26 of consolidation liquid 24, have in the curing room 18 of waste liquid tank 27.Then, by contacting with the consolidation liquid 24 supplied by spray nozzle 23, coated film 22 is solidified, and transport in next drying device.
The spraying mask 29 being configured with heater between spray nozzle 23 and roller delivery system 14 built-in.
Fig. 7 represents an example of spraying mask.In order to make excessive consolidation liquid not flow to coated film side, spraying mask 29 has the rake 30 that central side is high, outer circumferential side is low.At this rake 30, be built-in with heater 32.In the present embodiment 3, similarly to Example 2, show the example of the rake 30 of linearity, also can be set to the spraying mask 29 at rake 30 with ア ー Le (R).In addition, in the periphery of spraying mask 29, the drain tank 31 for discharging excessive consolidation liquid is provided with.
By in rake 30 internal heater 32, to the unnecessary consolidation liquid evaporation of the surface spray of spraying mask 29, therefore, it is possible to prevent the consolidation liquid accumulating in spraying mask 29 surface from dripping and being attached to the phenomenon in coated film.By using such spraying mask, compared with embodiment 2, even if when having sprayed more substantial consolidation liquid, also precision spray area can be controlled well, and the attachment of unnecessary consolidation liquid can be prevented, the uniformity in direction in the face can improving preventing effectiveness that electrode material flows out to collector plate installation site and electrode film.
The composition along thickness direction measuring the positive plate cross section that the present embodiment 3 obtains distributes, and the amount of the adhesive of result aluminium foil side is 5.2%, and face side is 4.5%, the amount of binder many 15% of aluminium foil side.In addition, observe the surface, collector plate installation site of aluminium foil, the result attachment to electrode material unconfirmed.
(comparative example 1)
Here, the aluminium foil (positive pole collector foil) of thickness 20 μm uses according to the mode of thickness 100 μm the anode sizing agent of applicator coating Examples 1, directly in hot-air drying stove, after 10 minutes, NMP contained in coated film evaporation removing is manufactured lithium ion secondary battery anode plate 120 DEG C of dryings.The manufacture method of this comparative example 1 is equivalent to former manufacture method.
Measure the composition distribution of the thickness direction in the positive plate cross section that this comparative example 1 obtains, amount minimizing compared with near surface of the adhesive of result aluminium foil side.Specifically, the amount of the adhesive of aluminium foil side is 2.2%, face side is 6.5%, aluminium foil side few 66%.
(comparative example 2)
Here, the aluminium foil (positive pole collector foil) of thickness 20 μm uses the anode sizing agent of applicator coating Examples 1 according to the mode of thickness 100 μm, flood 20 seconds in pure water and electrode material is solidified.Afterwards, 120 DEG C of dryings 10 minutes in hot-air drying stove, pure water contained in coated film and NMP evaporation removing are manufactured lithium ion secondary battery anode plate.The manufacture method of this comparative example 2 is the manufacture method that the electrode material do not considered in curing process flows out.
Measure the composition distribution of the thickness direction in the positive plate cross section that this comparative example 2 obtains, the amount of the adhesive of result aluminium foil side adds compared with near surface.Specifically, the amount of the adhesive of aluminium foil side is 5.3%, and face side is 4.0%, aluminium foil side many 25%.In addition, from the observed result on surface, collector plate installation site, be attached with the adhesive as electrode material.
(effect of embodiment 1 ~ 3)
As embodiment 1 ~ 3, by arranging curing process before the drying process of electrode material, in the inside of coated film, the binder concn of collector foil side is less compared with the comparative example 1 not arranging curing process with the difference of face side binder concn, the uniform concentration distribution of adhesive.
In comparative example 1, infer because coated film when drying starts is aqueous, in film, therefore produce the movement of the compositions such as adhesive, i.e. convection current, diffusion, after drying, the distribution of electrode material produces segregation, on the other hand, in embodiment 1 ~ 3, while by curing process solidification coated film, its composition is immobilized, and can not move time dry, the segregation therefore distributed diminishes.Thus, the binder concn of collector foil side relatively uprises, and therefore the adaptation of electrode film and collector foil is good, the effect that the durability obtaining lithium rechargeable battery improves.
In addition, as embodiment 1 ~ 3, by controlling the region that consolidation liquid contacts with coated film, can prevent electrode material from flowing out to the non-coated of collector foil.In comparative example 2, because the collector plate installation site being arranged on non-coated is attached with adhesive ingredients, the resistance therefore between collector foil-collector plate increases, and capacity and the cycle characteristics of lithium rechargeable battery likely worsen.
Further, the feature from the present embodiment 1 ~ 3: when transport maintains the collector foil of the coated film of solidification, also can use the contact roller delivery system contacted with coated film.Even if that is, former only can use air suspension delivery system, as shown in Figure 8 two-sided be when being coated with in the lump, also can use the roller delivery system 14 of contact, cheap hothouse can be utilized.
The effect of embodiment illustrated before this, not only obtained by the anode electrode plate comprising positive electrode, negative el also can obtain same effect.In addition, illustrate only specialize one example when implementing of the present invention, only otherwise depart from its technological thought or main feature, the present invention can implement in every way.In addition, also the present invention can be implemented by combination the present embodiment 1 ~ 3.
Industrial applicibility
The present invention may be used for manufacturing lithium rechargeable battery.
Symbol description
11: coating part
12: coated components
13: collector foil roller
14: roller delivery system
15: collector foil
16: hothouse
18: curing room
21: outer wall
22: coated film
23: spray nozzle
24: consolidation liquid
25: solidification flow container
26: supply pump
27: waste liquid tank
28: collector plate installation site
29: spraying mask
30: rake
31: drain tank
32: heater
51,51A, 51B: coating part
52,52A, 52B: coated components
53: collector foil roller
54,54A, 54B: roller delivery system
55: collector foil
56,56A, 56B: hothouse
57: electrode roller
58: non-contact transport system
Claims (15)
1. a manufacturing installation for lithium rechargeable battery, has:
The pulp-like electrode material comprising the active material of positive pole or negative pole, adhesive, curing agent and the 1st solvent is coated the coating part on collector foil surface;
Make consolidation liquid and the described pulp-like electrode material contacts coating described collector foil surface, thus make the curing room that described pulp-like electrode material solidifies; And
By the liquid component removing contained by the described electrode material that is cured in described curing room by the hothouse of described electrode material drying,
Described curing room has consolidation liquid contact mechanism, and the contact width of the described consolidation liquid along the direction vertical with described collector foil carriage direction is defined in more than the width of the described pulp-like electrode material coating described collector foil surface and within the collector plate installation site of described collector foil by described consolidation liquid contact mechanism.
2. the manufacturing installation of lithium rechargeable battery according to claim 1, described consolidation liquid contact mechanism is spray nozzle.
3. the manufacturing installation of lithium rechargeable battery according to claim 2,
Described in the spray area of described spray nozzle, the flow distribution of consolidation liquid has impartial flow distribution,
The position becoming 50% flow of described spray nozzle centralized traffic coat described collector foil surface described pulp-like electrode material width end more than.
4. the manufacturing installation of lithium rechargeable battery according to claim 2,
The spraying mask of the spray area specifying described spray nozzle is provided with between described spray nozzle and described collector foil.
5. the manufacturing installation of lithium rechargeable battery according to claim 4,
Described spraying mask has rake and the drain tank for being discharged by the excessive described consolidation liquid being attached to described rake surface.
6. the manufacturing installation of lithium rechargeable battery according to claim 5, described rake internal heater.
7. the manufacturing installation of lithium rechargeable battery according to claim 1,
As the delivery system transporting described collector foil, there is the contact roller delivery system with described collector foil surface contact.
8. a manufacture method for lithium rechargeable battery, has following operation:
A the pulp-like electrode material at least comprising the active material of positive pole or negative pole, adhesive, curing agent and the 1st solvent is coated the operation on collector foil surface by ();
B () makes consolidation liquid and the described pulp-like electrode material contacts coating described collector foil surface, thus make the operation that described pulp-like electrode material solidifies; And
(c) by the liquid component removing contained by the described electrode material that is cured by the operation of described electrode material drying,
In described (b) operation, the contact width of the described consolidation liquid along the direction vertical with described collector foil carriage direction is set to more than the width of the described pulp-like electrode material coating described collector foil surface and within the collector plate installation site of described collector foil.
9. the manufacture method of lithium rechargeable battery according to claim 8,
Described 1st solvent is with 1-METHYLPYRROLIDONE, dimethyl sulfoxide (DMSO), propylene carbonate, dimethyl formamide, the gamma-butyrolacton aprotic polar solvent that is representative or the mixed liquor of more than two kinds that comprises in these materials.
10. the manufacture method of lithium rechargeable battery according to claim 8,
Described consolidation liquid comprises the 2nd solvent, the character that described 2nd solvent has the described curing agent do not dissolved contained by described pulp-like electrode material and the character of dissolving each other with described 1st solvent contained by described pulp-like electrode material.
The manufacture method of 11. lithium rechargeable batteries according to claim 10,
Described 2nd solvent is with water, ethanol, isopropyl alcohol, the acetic acid protonic solvent that is representative or the mixed liquor of more than two kinds that comprises in these materials.
The manufacture method of 12. lithium rechargeable batteries according to claim 8,
Described pulp-like electrode material comprises conductive auxiliary agent further.
The manufacture method of 13. lithium rechargeable batteries according to claim 8,
Described adhesive is Kynoar based polymer, rubber-based polymeric thing or their mixture.
The manufacture method of 14. lithium rechargeable batteries according to claim 8,
Described adhesive is also used as described curing agent.
15. 1 kinds of lithium rechargeable batteries, are obtained by manufacturing installation according to claim 1 or manufacture method according to claim 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013050523A JP6033131B2 (en) | 2013-03-13 | 2013-03-13 | Method for manufacturing electrode plate of lithium ion secondary battery and apparatus for manufacturing electrode plate of lithium ion secondary battery |
| JP2013-050523 | 2013-03-13 | ||
| PCT/JP2013/082324 WO2014141547A1 (en) | 2013-03-13 | 2013-12-02 | Device and method for producing lithium ion secondary battery |
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| CN104871360A true CN104871360A (en) | 2015-08-26 |
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| CN201380066009.6A Pending CN104871360A (en) | 2013-03-13 | 2013-12-02 | Device and method for producing lithium ion secondary battery |
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|---|---|
| JP (1) | JP6033131B2 (en) |
| KR (1) | KR101697249B1 (en) |
| CN (1) | CN104871360A (en) |
| WO (1) | WO2014141547A1 (en) |
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| CN111758178A (en) * | 2018-02-26 | 2020-10-09 | 玛太克司马特股份有限公司 | Method for manufacturing membrane electrode assembly of fuel cell |
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| CN113841272A (en) * | 2019-05-17 | 2021-12-24 | Ppg工业俄亥俄公司 | System for roll-to-roll electrocoating battery electrode coatings onto foil substrates |
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| DE102018207649A1 (en) * | 2018-05-16 | 2019-11-21 | Robert Bosch Gmbh | Device for the electrochemical machining of components of a battery cell, method for operating the same and their use |
| WO2020139823A1 (en) * | 2018-12-23 | 2020-07-02 | Worcester Polytechnic Institute | Adhesive interlayer for battery electrode through dry manufacturing |
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|---|---|
| JP6033131B2 (en) | 2016-11-30 |
| KR101697249B1 (en) | 2017-01-17 |
| WO2014141547A1 (en) | 2014-09-18 |
| KR20150081301A (en) | 2015-07-13 |
| JP2014179170A (en) | 2014-09-25 |
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