WO2019087892A1 - 非水電解液二次電池用セパレータフィルム搬送装置及び非水電解液二次電池用セパレータフィルム製造方法 - Google Patents
非水電解液二次電池用セパレータフィルム搬送装置及び非水電解液二次電池用セパレータフィルム製造方法 Download PDFInfo
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- WO2019087892A1 WO2019087892A1 PCT/JP2018/039478 JP2018039478W WO2019087892A1 WO 2019087892 A1 WO2019087892 A1 WO 2019087892A1 JP 2018039478 W JP2018039478 W JP 2018039478W WO 2019087892 A1 WO2019087892 A1 WO 2019087892A1
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- separator film
- magnetic field
- electrolyte secondary
- field generation
- aqueous electrolyte
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H20/00—Advancing webs
- B65H20/02—Advancing webs by friction roller
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/02—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with longitudinal slitters or perforators
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
- H01M50/406—Moulding; Embossing; Cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/511—Processing surface of handled material upon transport or guiding thereof, e.g. cleaning
- B65H2301/5115—Cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/175—Plastic
- B65H2701/1752—Polymer film
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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
- H01M10/04—Construction or manufacture in general
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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
-
- 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
Definitions
- the present invention generally relates to a transport apparatus and a method for manufacturing a separator film for a non-aqueous electrolyte secondary battery having a thin film thickness.
- a technique for removing foreign matter from an object using a magnet is known.
- a slurry composition for a secondary battery Patent Document 1
- a composition for molding a fuel cell separator Patent document 2
- a positive electrode plate / negative electrode plate Patent Document 3
- a conveyer for conveying glass pieces Patent Document 4
- an interlayer tape Patent Document 5
- the transfer speed of ions is slower compared to, for example, an alkaline battery.
- the time required for the ions to move between the positive electrode and the negative electrode increases, and as a result, the output of the battery decreases.
- the separator film (hereinafter, unless otherwise specified, “separator film” refers to the separator film for non-aqueous electrolyte secondary battery) to reduce the ion migration distance It is necessary to compensate for the slow moving speed and to increase the output of the battery by reducing the
- the separator film has a very small thickness of about 10 ⁇ m to 20 ⁇ m due to the above requirement.
- the separator film needs to be porous in order to allow ions to pass through. Under these circumstances, the separator film is a very delicate material which can easily cause defects such as tears and wrinkles.
- a separator film is manufactured through various processes, a foreign material may be mixed in a separator film in those processes. If the foreign matter is brought into the battery while attached to the separator film, the battery characteristics may be adversely affected.
- the separator film is a very delicate material as described above, if the foreign matter is removed by an careless method, the defect may be caused thereby.
- One important significance of the present invention for solving the above-mentioned problems is that, in the production of a separator film, the separator film is applied while applying a magnetic field to the separator film being transported. It is in itself having introduced the method of peeling the adhering magnetic body from the said separator film.
- the magnetic substance is a foreign matter.
- the load on the separator film is very small as compared with other methods, and the possibility of causing the above-mentioned defects can be greatly reduced. It can be said that this effect is unique to the separator film which is a very delicate material.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery includes a transport path for transporting a separator film for a non-aqueous electrolyte secondary battery, and the transport path disposed and transported in the transport path.
- the distance between the first magnetic field generation source which generates a magnetic field for separating the magnetic substance adhering to the first surface of the separator film from the separator film, and the first magnetic field generation source with respect to the first surface of the separator film And a moving mechanism which is variable.
- the separator film for nonaqueous electrolyte secondary batteries which concerns on 1 aspect of this invention is the conveyance process of conveying the separator film for nonaqueous electrolyte secondary batteries,
- the 1st of the said separator film conveyed
- a first foreign matter removing step of bringing a first magnetic field generation source close to a surface and removing a magnetic body attached to the first surface of the separator film from the separator film to remove the magnetic material
- a retracting step of retracting the first magnetic field generation source when there is a risk of contacting the magnetic field generation source.
- a separator film transport apparatus for a non-aqueous electrolyte secondary battery includes a transport path for transporting a separator film for a non-aqueous electrolyte secondary battery, and the first and the first separator films in the transport path.
- the first and second magnetic field generation sources are disposed on the second surface side and generate a magnetic field for peeling the magnetic substance attached to the separator film conveyed from the separator film.
- the separator film for nonaqueous electrolyte secondary batteries which concerns on 1 aspect of this invention is the conveyance process of conveying the separator film for nonaqueous electrolyte secondary batteries, The 1st of the said separator film conveyed And a foreign matter removing step of bringing the first and second magnetic field sources close to the second surface and removing the magnetic substance adhering to the first and second surfaces of the separator film from the separator film and removing the magnetic material. ,including.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery adheres to a transport path for transporting a separator film for a non-aqueous electrolyte secondary battery, and the above-mentioned separator film to be transported
- a magnetic field generation unit provided with a magnetic field generation source for generating a magnetic field for separating a magnetic body from the separator film, and a cover made of a nonmagnetic material surrounding the magnetic field generation source, and arranged detachably in the transport path; Is equipped.
- the method further includes the step of transporting the separator film for the non-aqueous electrolyte secondary battery, and the surface of the separator film transported. And a foreign matter removing step of bringing a magnetic field generation unit into close proximity and removing the magnetic material adhering to the surface of the separator film from the separator film to remove the magnetic material from the separator film.
- a magnetic field generation source for generating a magnetic field for peeling off the film, and a cover made of a nonmagnetic material surrounding the magnetic field generation source are provided, and are detachably disposed in a transport path for transporting the separator film.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery includes a transport path for transporting a separator film for a non-aqueous electrolyte secondary battery, and the transport path disposed and transported in the transport path.
- a magnetic field generation source that generates a magnetic field for separating a magnetic body attached to the separator film from the separator film, and an auxiliary mechanism that assists the separation of the magnetic body by the magnetic field generation source.
- the method further includes the step of transporting the separator film for the non-aqueous electrolyte secondary battery, and the surface of the separator film transported. And a foreign matter removing step of bringing a magnetic field generation source into close proximity and peeling off a magnetic substance adhering to the surface of the separator film from the separator film, and aiding aiding the peeling of the magnetic substance by the magnetic field generation source And a process.
- FIG. 1 It is a side view which shows roughly the most primitive composition of a separator film conveyance device for nonaqueous electrolyte secondary batteries concerning one embodiment of the present invention.
- FIG. 1 Each of (a) and (b) is sectional drawing which shows the specific structural example of a magnetic field generation unit.
- (A) And (b) is sectional drawing which shows an example of the cleaning method of the magnet bar with which the cover was mounted
- It is a top view which shows roughly the 1st example of arrangement of a magnet bar. It is a top view which shows roughly the 2nd example of arrangement of a magnet bar. It is a top view which shows roughly the 1st example of arrangement of the 1st magnet bar and the 2nd magnet bar.
- Each of (a) and (b) is a graph which shows the 1st simulation result which concerns on the suitable conditions of the presence or absence of discharge by an air nozzle, and direction.
- Each of (a) and (b) is a graph which shows the 2nd simulation result which concerns on the suitable conditions of the direction of discharge by an air nozzle. It is a graph which shows the 3rd simulation result concerning the suitable conditions of the angle of discharge by an air nozzle. It is a figure which shows the example which applied the magnet bar with respect to the slit apparatus of a separator film.
- the “separator film” refers to a separator film for a non-aqueous electrolyte secondary battery.
- the “separator film” includes a raw material film of a separator film, a slit film slit from a raw material film of the separator film, and a film-like one of intermediates at the production stage thereof.
- Magnetic refers to a substance that has the property of being attracted to a magnet.
- examples of the magnetic substance include magnetic materials such as iron, cobalt, nickel, triiron tetraoxide, and ferritic stainless steel, but not limited thereto.
- Nonmagnetic material refers to a material that does not have the property of being attracted to a magnet.
- nonmagnetic materials include austenitic stainless steels such as SUS304 and SUS316.
- austenitic stainless steels become magnetic and become magnetic after being subjected to physical stimulation such as friction, plastic deformation, or impact. Therefore, the austenitic stainless steel shavings and wear powder generated by the physical stimulation of the manufacturing equipment including the austenitic stainless steel are magnetic bodies. 2.
- the production process of the separator film includes a kneading process, a rolling process, a removal process, a stretching process, a coating process, an original wound body forming process, a slit process, a slit film wound body forming process, It includes a transport process.
- the kneading step is a step of kneading a polyolefin resin and a film forming plasticizer to prepare a polyolefin resin solution.
- An example of the polyolefin resin is polyethylene.
- film forming plasticizers include (1) liquid paraffin, dibutyl phthalate, bis (2-ethylhexyl) phthalate, dioctyl phthalate, phthalic esters such as dinonyl phthalate, and (2) non-oleyl alcohol etc. Examples thereof include saturated higher alcohols, and (3) saturated higher alcohols such as paraffin wax and stearyl alcohol.
- the rolling step is a step of extruding the polyolefin resin solution prepared in the kneading step and processing it into a sheet-like film.
- the removing step is a step of removing the pore forming agent for film formation from the film formed in the rolling step to obtain a film in which fine pores are formed.
- the stretching step is a step of stretching the film in which the micropores are formed to obtain a porous film raw fabric.
- the order of the removing step and the stretching step may be reversed. That is, a porous film raw film can also be obtained by removing the pore forming agent from the stretched film.
- the coating step is a step of forming a heat-resistant layer on at least one side of the porous film.
- it is a step of forming an aramid heat-resistant layer by applying an aramid / NMP (N-methyl-pyrrolidone) solution (coating solution) to the porous film.
- aramid / NMP N-methyl-pyrrolidone
- coating solution coating solution
- the raw wound body forming step is a step of winding the above-mentioned film raw material or laminated film raw fabric to form a raw rolled body.
- the slitting step is a step of forming a slit film by slitting the raw fabric along a conveyance direction of the raw fabric by a slit device.
- the slit film wound body forming step is a step of winding the slit film to form a slit film wound body.
- a conveyance process is a process of conveying a separator film in each process from the said removal process to the said slit film winding body creation process.
- the separator film used in the present specification includes the above-described sheet-like film, a micropore-formed film, a porous film source, a porous laminated film source, and a slit film.
- the film thickness of the separator film is as thin as about 10 ⁇ m to 20 ⁇ m. For this reason, it can be seen that the separator film is a very delicate material that can easily cause defects such as tears and wrinkles.
- a magnetic field generation source is disposed in the transport path 11 for transporting the separator film 1.
- the magnetic field generation source generates a magnetic field for peeling the magnetic substance attached to the separator film 1 to be conveyed from the separator film 1. Thereby, the foreign material which consists of magnetic bodies can be removed from separator film 1 under conveyance.
- FIG. 1 is a side view schematically showing the most primitive configuration of a transfer device (a separator film transfer device for a non-aqueous electrolyte secondary battery) 101 according to an embodiment of the present invention.
- a transport path 11 for transporting the separator film 1 for the non-aqueous electrolyte secondary battery is formed.
- the transport device 101 also includes a magnet bar (magnetic field generation source) 12.
- the magnet bar 12 is disposed in the transport path 11 and generates a magnetic field for peeling the magnetic material attached to the separator film 1 transported from the separator film 1.
- FIG. 2 is a cross-sectional view showing a specific configuration example of the magnet bar 12.
- FIG. 2 shows a cross section of the magnet bar 12 along the separator film 1 in FIG.
- the magnet bar 12 is configured by linearly arranging a plurality of magnets 121 and a plurality of yokes 122 interposed between the magnets 121 in a plane along the separator film 1.
- the magnet bar 12 has a case 123 that accommodates the plurality of magnets 121 and the plurality of yokes 122.
- the case 123 is formed of a nonmagnetic stainless steel (SUS) in a pipe shape.
- the material forming the case 123 is not limited to the nonmagnetic stainless steel, but in consideration of the influence of the magnet 121 on the magnetic field, it is preferable to be made of a nonmagnetic material.
- the magnetic flux can be concentrated in the vicinity of each yoke 122 by the presence of the plurality of yokes 122, and the foreign substance removal effect can be enhanced in the portion where the magnetic flux is concentrated.
- the case 123 can prevent foreign matter from entering the gap between the magnet 121 and the yoke 122. Further, by providing the case 123, the magnet bar 12 can facilitate the cleaning of the magnet bar 12, and can improve the safety during handling.
- the thickness of the case 123 is, for example, 0.1 mm to 2 mm. Since the smaller the thickness of the case 123 is, the higher the foreign substance removing effect is, in this respect, the thinner the case 123, the better.
- the magnet bar 12 preferably generates a magnetic field having a magnetic flux density of 0.8 T or more in the vicinity of the yokes 122 outside the case 123, and more preferably generates a magnetic field of 1 T or more.
- the “linearly arranged” is preferably arranged linearly, but may not necessarily be linearly arranged, and may be curved or bent linear. Further, the number of magnet bars 12 arranged at a place where the transport path 11 is located may be one or more.
- the magnet bar 12 is configured, for example, as follows.
- the length of the magnet bar 12 on the surface along the separator film 1 may be influenced by the magnetic field from one end to the other end in the width direction of the separator film 1 by all the magnet bars 12 provided in the transport device 101
- the length in the width direction of the separator film 1 may be set as long as it can be made.
- the directions of the magnetic poles of the magnets 121 be such that the surfaces facing each other have the same polarity (that is, the N poles and the S poles face each other).
- the pitch of the plurality of magnets 121 on the surface along the separator film 1 is preferably 1 mm to 50 mm, and more preferably 5 mm to 20 mm.
- the pitch is larger, there is an advantage that it is easy to widen the range affected by the magnetic field.
- the magnet bar 12 since the magnet bar 12 generates a large magnetic field only in the vicinity of each of the yokes 122, the larger the pitch, the disadvantage is that the leakage of foreign particles is likely to occur due to interspersed positions where a large magnetic field is generated. .
- the pitch may be determined in consideration of these merits and demerits, and may be 10 mm, for example.
- each magnet 121 permanent magnets, such as a well-known neodymium magnet, a ferrite magnet, a samarium cobalt magnet, etc., and an electromagnet are mentioned.
- the magnetic flux density of the magnet bar 12 is preferably 4,000 gauss or more, more preferably 5,000 gauss or more, and still more preferably 9,000 gauss or more. If the magnetic flux density of the magnet bar 12 is 4000 gausses or more, peeling of the magnetic body is facilitated, which is preferable.
- the magnetic flux density of the magnet bar 12 is preferably 20000 gausses or less, more preferably 15000 gausses or less. When the magnetic flux density of the magnet bar 12 is 20000 gausses or less, it is easy to remove foreign matter attached to the magnet bar 12 and it is preferable. On the other hand, when the magnetic flux density of the magnet bar 12 is too high, it is difficult to remove the foreign matter attached to the magnet bar 12, and the introduction cost of the magnet bar 12 is not preferable.
- FIG. 3 is a cross-sectional view showing a specific configuration example of the magnetic field generation unit 14a.
- (B) of FIG. 3 is a cross-sectional view showing a specific configuration example of the magnetic field generation unit 14b.
- the magnetic bar 12 and the cover 13a surrounding the magnet bar 12 and made of a nonmagnetic material such as resin constitute a magnetic field generating unit 14a, and the magnetic field generating unit 14a carries The path 11 is detachably disposed.
- the magnetic field generation unit 14b is constituted by the magnet bar 12 and the cover 13b which is surrounded by the magnet bar 12 and made of nonmagnetic material such as resin.
- the cover 13a and the cover 13b are collectively referred to as the cover 13, and the magnetic field generating unit 14a and the magnetic field generating unit 14b are collectively referred to as the magnetic field generating unit 14.
- the cover 13 When the magnetic field generation unit 14 is removed from the transport path 11 or when the magnetic field generation unit 14 is attached to the transport path 11, the cover 13 generates the magnetic field generation unit 14. To suppress strong adsorption to the member made of the magnetic material that constitutes the
- the magnetic field generating unit 14 preferably has an elongated shape extending linearly. Further, in the transport path 11, a guide 15 for slidingly mounting the magnetic field generating unit 14 along the longitudinal direction of the magnetic field generating unit 14 is formed. Thereby, the magnetic field generation unit 14 can be easily attached and detached by the slide operation.
- the guide 15 is a generic term for a guide 15a and a guide 15b described later.
- the magnetic field generating unit 14 a shown in FIG. 3A is disposed downward from the upper surface side of the separator film 1.
- the guide 15a supports the magnetic field generation unit 14a on the same side (front side) as the side facing the separator film 1 in the magnetic field generation unit 14a.
- the cover 13 b of the magnetic field generating unit 14 b to be disposed upward from the lower surface side of the separator film 1 has a different shape from the cover 13 a.
- the guide 15b in this case supports the magnetic field generation unit 14b on the side (back side) opposite to the side facing the separator film 1 in the magnetic field generation unit 14b.
- the rigidity of the outer surface of the cover 13 is lower than any of the rigidity of the outer surface of the magnet bar 12 (the outer surface of the case 123) and the rigidity of the guide 15.
- the cover 13 is formed of resin and the case 123 is formed of stainless steel, the above-described rigidity relationship can be realized.
- the magnetic field generation unit 14 when the magnetic field generation unit 14 is removed from the transport path 11 or when the magnetic field generation unit 14 is attached to the transport path 11, the magnetic field generation unit 14 includes the other magnetic field generation units 14 and the transport path 11. Even in the case of a collision caused by being drawn to a member made of a magnetic body to be configured, it is possible to suppress the occurrence of damage to each part and injury of an operator.
- the cover 13 is formed of metal in the same manner as the guide 15, when the magnetic field generation unit 14 is attached and detached by sliding operation, metal foreign matter is removed by cutting (scrubbing) between metals (cover 13 and guide 15). It may occur.
- the resin forming the cover 13 is not particularly limited as long as the resin realizes the above-described rigidity relationship. However, from the viewpoint of having sufficient slidability and being hard to be scraped, as the resin, polyamide, polytetrafluoroethylene, polyurethane and polyolefin are preferable, polyolefin is more preferable, and ultrahigh molecular weight polyethylene is particularly preferable.
- an opening 16 (a generic name of an opening 16 a in FIG. 3A and an opening 16 b in FIG. 3B) is formed in a portion of the magnet bar 12 facing the separator film 1.
- FIGS. 4A and 4B are cross-sectional views showing an example of a method of cleaning the magnet bar 12 attached to the cover 13.
- cleaning of the magnet bar 12 can be facilitated. That is, as shown in FIG. 4A, the adhesive tape 21 is wound around the magnet bar 12 from the opening 16 while rotating the magnet bar 12 in the cover 13, as shown in FIG. 4B. By peeling off the wound adhesive tape 21 from the magnet bar 12, the foreign matter attached to the magnet bar 12 can be removed.
- the cover 13 holds the magnet bar 12 rotatably about an axis along the longitudinal direction on the inner side thereof.
- the magnet bar 12 needs cleaning for removing foreign matter, it is desirable to prepare a spare for the magnetic field generating unit 14. As a result, even when the magnetic field generation unit 14 is removed for cleaning or the like, it is possible to suppress the decrease in the operation rate of the device by mounting the spare and operating the manufacturing apparatus of the separator film 1.
- unit may be sufficient as the magnet bar 12 demonstrated below, you may comprise the magnetic field generation unit 14 mentioned above.
- the magnetic flux is concentrated on the yoke 122 portion, and the magnetic flux density is increased. Conversely, the magnetic flux density is low between the yokes 122. In the portion where the magnetic flux density is low, the effect of removing foreign matter is reduced as compared with the high portion. In order to narrow the portion where the magnetic flux density is low, it is conceivable to reduce the thickness of the magnet (thickness in the direction of the magnetic pole), but if it is too thin, for example less than 1 mm, the manufacture of the magnet bar 12 becomes difficult. Not
- the following idea of the arrangement of the magnet bars 12 can be considered.
- the device of the arrangement of the magnet bar 12 described here is appropriately adopted as needed. It is a matter to be done.
- FIG. 5 is a plan view schematically showing a first arrangement example of the magnet bar 12.
- the width direction of the separator film 1 that is, the width direction of the separator film 1
- Magnet bar 12 is arranged to be inclined with respect to TD. That is, the axis 12 x of the magnet bar 12 is inclined with respect to the width direction TD corresponding to the width direction of the separator film 1.
- the magnet bar 12 preferably has a linear shape, but may not necessarily have a linear shape.
- FIG. 6 is a plan view schematically showing a second arrangement example of the magnet bar 12.
- the respective yokes 122 are shown in perspective (in broken lines) for the sake of simplicity.
- a plurality of magnet bars 12 are arranged side by side in the transport direction on one side of the separator film 1 so as to complement mutually low magnetic flux density portions It is. That is, when viewed in the transport direction of the separator film 1, the yoke 122 of the other magnet bar 12 may be positioned between the two yokes 122 of the one magnet bar 12.
- the plurality of magnet bars 12 in the second arrangement example need not necessarily be arranged adjacent to each other, and other members may be interposed therebetween if arranged in a series of conveyance paths. Absent.
- the relationship between the two magnet bars 12 that is, the first magnet bars 12 a in the upstream-downstream relationship in the transport path 11 or the second magnet bars 12 b in the same relationship). May be as in the second arrangement example.
- the separator film 1 has the first and second surfaces, the basic arrangement of the magnet bar 12 is to be disposed on the first and second surfaces, respectively. However, if the foreign matter needs to be removed from only one side due to some reason, the magnet bar 12 may be disposed only on the one side.
- first magnet bar 12a the magnet bar 12 disposed on the first surface side of the separator film 1
- second magnet bar 12b the magnet bar 12 disposed on the second surface side
- FIG. 7 is a plan view schematically showing a first arrangement example of the first magnet bar 12a and the second magnet bar 12b.
- the first magnet bar 12 a and the second magnet bar 12 b be disposed at mutually offset positions in the transport direction of the separator film 1.
- it can suppress that the magnetic field which generate
- FIG. 8 is a plan view schematically showing a second arrangement example of the first magnet bar 12a and the second magnet bar 12b.
- the respective yokes 122 are shown in perspective (in broken lines) for the sake of simplicity.
- the first magnet bar 12 a and the second magnet bar 12 b are a weak range of the magnetic field of the first magnet bar 12 a (a portion between the two yokes 122). ) May be disposed such that the strong range (yoke 122 portion) of the magnetic field of the second magnet bar 12b is located.
- the first magnet bar 12a and the second magnet bar 12b can not be disposed at mutually offset positions in the transport direction of the separator film 1, or they can be disposed at offset positions, the offset amount must be reduced. It is particularly effective in the case.
- the magnet bar 12 In order to remove foreign matter made of a magnetic substance from the separator film 1 being conveyed by the magnet bar 12, the magnet bar 12 needs to be brought close to the surface of the separator film 1.
- the distance between the magnet bar 12 and the separator film 1 depends on the magnetic flux density of the magnet bar 12 but is preferably 1 mm to 20 mm, more preferably 1 mm to 10 mm, and more preferably 2 mm to 10 mm Desirably, 2 mm to 8 mm is more desirable.
- FIG. 9 is a side view schematically showing a first arrangement relationship of the magnet bar 12.
- the conveyance roller 111 shown in FIG. 9 is provided in the conveyance path 11, is in contact with the first surface of the separator film 1, and feeds the separator film 1 in the conveyance direction.
- the magnet bar 12 can be disposed at a position facing the transport roller 111 as a first disposition relation.
- the separator film 1 is easily vibrated during conveyance because of its thinness. When vibrated, the distance between the surface of the separator film 1 and the magnet bar 12 fluctuates, which makes it difficult to maintain an appropriate foreign matter removing effect.
- the magnet bar 12 By arranging the magnet bar 12 at a position facing the transport roller 111, the occurrence of the above problem can be suppressed.
- the outer peripheral member of the transport roller 111 facing the magnet bar 12 is preferably made of a nonmagnetic material, for example, nonmagnetic stainless steel.
- FIG. 10 is a side view schematically showing a second arrangement relationship of the magnet bar 12. As shown in FIG. 10, it is also possible to arrange the magnet bar 12 between the conveyance rollers 111 adjacent to each other as a second arrangement relation.
- the transport path 11 is provided with a plurality of first transport rollers 111 a which are respectively disposed along the transport direction of the separator film 1 and in contact with the first surface of the separator film 1.
- the magnet bar 12 is arrange
- the magnet bar 12 corresponding to the second surface of the separator film 1 is similarly disposed between the second transport rollers 111b.
- the magnet bar 12 may be disposed on the same side as the transport roller as illustrated as the first magnet bar 12 a and the second magnet bar 12 b in FIG. 10 with the separator film 1 as a boundary. However, it may be disposed on the opposite side to the transport roller.
- This arrangement relationship is particularly effective when magnetic materials are used for the first transport roller 111a and the second transport roller 111b themselves or peripheral members thereof.
- One of the first arrangement relationship and the second arrangement relationship may be adopted in one transport path 11, or may be adopted in combination.
- the magnet bar 12 needs to be disposed close to the surface of the separator film 1.
- the separator film 1 has a thickness sufficiently small with respect to the distance to the magnet bar 12, and basically has a uniform shape. Therefore, if the separator film 1 does not vibrate during transport of the separator film 1, the distance between the separator film 1 and the magnet bar 12 is kept constant.
- the shape of the separator film 1 may be partially different from the others, or another member may be applied to a specific part of the separator film 1.
- the leading raw material and the following raw material may be connected together using a tape or the like.
- a marking tape may be attached to that part.
- the separator film 1 (or a tape attached thereto or the like) has a distance to the magnet bar 12 more than usual. It may become smaller and possibly contact the magnet bar 12. When such a contact occurs, there may occur a problem that the separator film 1 may be damaged or foreign matter which has been peeled off from the separator film 1 and attached to the magnet bar 12 may be reattached to the separator film 1.
- the moving mechanism that makes the distance of the magnet bar 12 to the facing surface of the separator film 1 variable.
- the moving mechanism for example, the following can be considered.
- FIG. 11 is a side view schematically showing a first specific example of the moving mechanism of the magnet bar 12.
- the first specific example is a moving mechanism including a linear moving mechanism for moving the magnet bar 12 (for each magnetic field generating unit 14a in FIG. 11) by linear movement.
- a direct drive mechanism one by motor drive, one by hydraulic drive etc. can be considered, but the thing of FIG. 11 is by the air cylinder 17 driven by compressed air.
- the drive direction of the air cylinder 17 (direction Cy in FIG. 11) is the normal direction of the separator film 1, but even if the drive direction is inclined with respect to the normal direction. Good.
- the moving mechanism of the magnet bar 12 of the magnetic field generating unit 14a is provided in FIG. 11, the moving mechanism of the magnet bar 12 of the magnetic field generating unit 14b may be provided.
- the air nozzle 18 is shown in figure in FIG. 11, this is mentioned later.
- the moving mechanism in the separator film 1 is provided in the transport path 11 for a part that may protrude from the surface of the separator film 1, such as a joint of the separator film 1. You just have to go through the Note that by providing the moving mechanism on both sides of the separator film 1, it is not necessary to consider which side the joint should be made to pass through.
- FIG. 12 (a) is a side view schematically showing a second example of the moving mechanism of the magnet bar 12, and FIG. 12 (b) is a plan view thereof.
- the second specific example is based on a rotation mechanism 19 that moves the magnet bar 12 by rotation about the rotation axis 191 parallel to the surface of the separator film 1. Moving mechanism.
- the rotation mechanism 19 includes the rotation shaft 191 and a support 192 that rotates integrally with the rotation shaft 191 and supports the magnet bar 12.
- the rotation mechanism 19 may further include a motor (not shown) for rotating the rotation shaft 191, but may be manually rotated.
- the support 192 supports the magnet bar 12 so that its longitudinal direction is parallel to the surface of the separator film 1.
- the magnet bar 12 is supported in a cantilever manner by one support 192, but both sides of the magnet bar 12 are disposed with the support 192 and the rotating shaft 191. You may hold it to support it.
- one support 192 may support one magnet bar 12
- one support 192 may support the first magnet bar 12a and the second magnet bar 12b to rotate them integrally. Is desirable. Thus, the first magnet bar 12a and the second magnet bar 12b can be simultaneously moved by one rotational movement.
- FIG. 13 (a) is a side view schematically showing a modification of the second embodiment of the moving mechanism of the magnet bar 12, and FIG. 13 (b) is a plan view thereof.
- the center line of the rotating shaft 191 may be disposed to pass through the separator film 1.
- an auxiliary mechanism for assisting the peeling of the foreign matter by the magnet bar 12.
- an assisting mechanism that assists in peeling refers to a mechanism that exerts an action of facilitating peeling.
- the air nozzle (gas discharge mechanism) 18 as one aspect of the auxiliary mechanism will be mainly described below.
- the air nozzle 18 assists the separation of foreign matter made of a magnetic substance from the separator film 1 by spraying a gas onto the separator film 1.
- the gas discharged from the air nozzle 18 may be normal air, but other gases may be used, and ionized gas may be included to have an electrostatic elimination effect.
- the air nozzle 18 discharges the gas from the downstream side in the transport direction of the separator film 1 toward the magnet bar 12 side, and passes part of the gas through the gap between the separator film 1 and the magnet bar 12.
- the direction of discharge of the gas is as described above according to the simulation result described later, it may be from the transport direction upstream side of the separator film 1 to the magnet bar 12 side, and both upstream and downstream sides From the side to the magnet bar 12 side.
- the magnet bar 12 and the air nozzle 18 may be moved integrally, in other words, their relative positional relationship may be maintained constant. That is, the moving mechanism may be a mechanism for moving only the magnet bar 12 (including the magnetic field generating unit 14a) as described above, or the magnet bar 12 (including the magnetic field generating unit 14a) and the air nozzle 18 may be integrated. It may be a mechanism to move the magnet bar 12 (including the magnetic field generating unit 14a) as described above, or the magnet bar 12 (including the magnetic field generating unit 14a) and the air nozzle 18 may be integrated. It may be a mechanism to move the
- each of (a) and (b) of FIG. 14 is a graph showing a first simulation result according to the preferable condition of the presence / absence of the discharge by the air nozzle 18 and the direction.
- Each of (a) and (b) of FIG. 15 is a graph showing a second simulation result according to a preferable condition of the discharge direction by the air nozzle 18.
- FIG. 16 is a graph showing a third simulation result according to a preferable condition of the angle of discharge by the air nozzle 18. The conditions of these simulations are as follows.
- Wall-particle friction coefficient 0.67 Hamaker constant: 10-19 J Separation distance: 0.4 nm ⁇ Magnetic flux density of magnet (corresponding to magnet bar 12): 1 T (10,000 gauss) ⁇ Air assist (corresponds to the air nozzle 18)
- the discharge angle with respect to the normal direction of the wall using four conditions of (C) 5 °, (D) 15 °, (E) 30 °, and (F) 45 °, the rotation center (FIG. 14 (a) and (B) and the distance from the coordinates (-50, 0) in (a) and (b) of FIG.
- FIGS. 14A and 15A show an example in which the air nozzle 18 is disposed on the upstream side of the magnetic field generation unit 14 in the transport direction of the separator film 1.
- FIGS. 14B, 15B, and 16 show an example in which the air nozzle 18 is disposed downstream of the magnetic field generation unit 14 in the transport direction of the separator film 1. There is.
- the discharge angle of the air nozzle 18 (discharge angle with respect to the normal direction of the surface of the separator film 1) is determined so that the tip of the air nozzle 18 faces the magnetic field generation unit 14 side.
- lines 31 and 32 represent the contours of the separator film 1 and the magnetic field generation unit 14, respectively.
- an arrow 34 represents discharge (with a discharge direction) by the air nozzle 18.
- (a) and (b) in FIG. 14 and (a) and (b) in FIG. 15 show a large number of particles, but among these particles, there is no discharge by the air nozzle 18.
- the particles 35a exhibit behavior
- the particles 35b exhibit behavior when there is discharge by the air nozzle 18.
- the forces acting on the particles include contact force, gravity, adhesion, air resistance, and It calculated using the discrete element method (DEM: Discrete Element Method) which considered magnetic force.
- DEM discrete Element Method
- the contact force shall conform to the discrete element method.
- FIGS. 14A and 14B show the case of the condition (A) of each particle and the condition (E) of the discharge angle.
- each particle 35 a does not completely peel from the separator film 1
- each particle 35 b does not completely separate from the separator film 1. It was exfoliated, and the result which showed the effect by assistance of exfoliation was obtained. From this result, it is understood that the discharge by the air nozzle 18 is effective for peeling each particle from the separator film 1, in other words, assisting the peeling of each particle from the separator film 1.
- FIGS. 15A and 15B show the case of the condition (B) of each particle and the condition (E) of the discharge angle.
- the particle 35 b of (a) of FIG. 15 is peeled from the separator film 1 on the downstream side in the transport direction of the separator film 1 as compared with the particle 35 b of (a) of FIG. That is, when discharging by the air nozzle 18 from the upstream side to the downstream side in the transport direction of the separator film 1, particles having a small size may be difficult to separate from the separator film 1.
- the particle 35b of (b) of FIG. 15 is peeled from the separator film 1 at substantially the same position as compared with the particle 35b of (b) of FIG. That is, when discharging by the air nozzle 18 from the downstream side to the upstream side in the transport direction of the separator film 1, even particles having a small size are easily separated from the separator film 1.
- the air nozzle 18 may discharge from the upstream side to the downstream side in the transport direction of the separator film 1 or discharge from the downstream side to the upstream side in the transport direction of the separator film 1 It is understood that you may However, it is also understood that the latter is more preferable.
- FIG. 16 shows the case where the air nozzle 18 discharges from the downstream side to the upstream side in the transport direction of the separator film 1, and the condition (A) of each particle and the condition (C) to (F) of the discharge angle Each case is shown. Further, FIG. 16 shows a large number of particles, but the condition (C) to (F) is for the particles 35a described above and the behavior showing the case where there is discharge by the air nozzle 18 described above. Particles 35c to 35f for each correspondence with. From the results shown in FIG. 16, it can be seen that the particles are separated from the separator film 1 on the upstream side in the transport direction of the separator film 1 as the discharge angle is larger. In other words, the closer the discharge direction is to be parallel to the surface of the separator film 1, the higher the effect of the air nozzle 18 assisting the separation of particles.
- An example of the air nozzle 18 is shown below. That is, for example, 16 holes (diameter: 4 mm) for discharge are formed in the width direction of the separator film 1 (width: 1 m) per air nozzle 18. In addition, the velocity of the gas near the outlet of each discharge hole is, for example, 18 m / s.
- the following mode may be adopted as the foreign matter peeling assist mechanism.
- it is a mechanism which makes a part of conveyance way 11 a conveyance way along a curve so that the field by the side of magnet bar 12 of separator film 1 may become convex. Specifically, this corresponds to the portion of the separator film 1 facing the first magnet bar 12a on the uppermost stream of the transport path in FIG. 17 described later. According to this mechanism, it is possible to assist the separation of the foreign matter made of the magnetic material by the centrifugal force.
- Another embodiment is a vibration mechanism for giving vibration to the separator film 1.
- Ultrasonic vibration is desirable as the type of vibration.
- the ultrasonic vibration can add energy necessary for assisting the separation of the foreign matter while keeping the amplitude sufficiently smaller than the gap between the separator film 1 and the magnet bar 12.
- FIG. 17 is a view showing an example in which the magnet bar 12 is applied to the slit device 102 of the separator film 1. The example which applied the magnet bar 12 with respect to the slit apparatus 102 of the separator film 1 is demonstrated based on FIG.
- the slit device 102 pulls out and conveys the raw fabric from the raw fabric wound body 2 in which the raw fabric of the separator film 1 (hereinafter, simply referred to as “raw fabric”) is wound and transported along the transportation direction thereof.
- a plurality of slit separator films 1 (hereinafter referred to as “slit films 3") are formed by slitting the counter, and each slit film 3 is individually wound to form a slit film wound body 4 It is an apparatus. Therefore, the transport path of the separator film 1 is from the original wound body 2 to the slit film wound body 4.
- the direction of rotation of the original wound body 2 when drawing out the original fabric from the original wound body 2 may be clockwise or counterclockwise (broken line) in FIG. Then we assume clockwise.
- the direction of rotation of the slit film winding body 4 when winding the slit film 3 in the slit film winding body 4 may also be clockwise (broken line) in FIG. 17 or counterclockwise. Although it is good, it presupposes counterclockwise rotation here.
- the inner surface of the separator film 1 is referred to as a first surface
- the outer surface is referred to as a second surface
- the transport roller 111 in contact with the first surface and the second surface
- the rollers 40 and 40 and 41 and 41, excluding the slit roller 422.) are referred to as a first conveyance roller 111a and a second conveyance roller 111b, respectively, and are magnet bars disposed on the side of the first conveyance roller 111a and the second conveyance roller 111b.
- the reference numeral 12 is referred to as a first magnet bar 12a and a second magnet bar 12b, respectively.
- nip rollers 40 and 40 and 41 and 41 are provided which sandwich the separator film 1 from the first surface and the second surface.
- the nip rollers 40 and 40 and 41 and 41 apply a driving force for transporting the separator film 1 to the separator film 1.
- the first magnet bar 12a and the second magnet bar 12b are disposed upstream of the nip rollers 40 and 40 and 41 and 41, respectively.
- the foreign matter can be removed by the magnet bar 12 before the foreign matter made of the magnetic material is pressure-bonded to the surface of the separator film 1 by the nip rollers 40 and 40 and 41 and 41. Therefore, the fall of the foreign material removal effect by magnet bar 12 can be controlled.
- first magnet bar 12a and the second magnet bar 12b disposed on the upstream side of the nip rollers 40 and 40 and 41 and 41 are partially simplified in FIG.
- An auxiliary mechanism may be equipped.
- a slit portion 42 for slitting the separator film 1 is provided in the transport path of the slit device 102.
- the slit portion 42 is configured by a slit blade 421 and a slit roller 422 that supports the separator film 1 from the back surface of the slit blade 421.
- the first magnet bar 12 a and the second magnet bar 12 b are also disposed downstream of the slit portion 42.
- the slit portion 42 easily generates a metal foreign substance including a magnetic body.
- the first magnet bar 12a and the second magnet bar 12b are disposed on the downstream side of the slit portion 42, it is possible to suppress the foreign matter consisting of the magnetic material from remaining attached to the first surface and the second surface of the separator film 1 can do.
- first magnet bar 12a and the second magnet bar 12b disposed on the downstream side of the slit portion 42 are partially simplified in FIG. 17, the above-described moving mechanism and foreign matter peeling assist mechanism are provided. May be
- a foreign matter detection unit that detects foreign matter adhering to the separator film 1 be provided in the conveyance path of the slit device 102.
- the foreign matter detector is disposed downstream of the first magnet bar 12 a and the second magnet bar 12 b and upstream of the slit film winding body 4.
- a touch roller 44 may be provided on the transport path of the slit device 102 for each slit film winding body 4.
- the touch roller 44 prevents the slit film 3 wound around the corresponding slit film winding body 4 from fluttering or shifting, so that the slit film 3 corresponds to the outer periphery of the corresponding slit film winding body 4. It has a function to hold down.
- the magnet bar 12 may be applied in the manufacturing process of the laminated film in which the heat-resistant layer is formed through the coating process as described above. That is, by applying the magnet bar 12 to the laminated film raw fabric, foreign matter newly mixed in the coating process can be removed. On the other hand, by applying the magnet bar 12 to at least the surface on the coating side of the porous film before coating, it is possible to prevent foreign matter from mixing between the heat-resistant layer and the porous film.
- both sides it is preferable to apply to both sides of a porous film.
- a porous film When foreign matter is mixed between the heat-resistant layer and the porous film, removal of the foreign matter becomes very difficult after the film passes through the coating process and becomes a laminated film.
- the magnet bar 12 is applied. By thus removing the foreign matter in at least one or more steps, it is possible to prevent the foreign matter from being left behind.
- the magnet bar 12 having a configuration obtained by appropriately combining each of the configurations or a plurality of the configurations that are preferably applied to the transport device 101 described above, manufacturing at high speed like the separator film 1 Even if it is transported, it becomes possible to remove foreign matter. Also in the separator film 1 manufactured and conveyed at such a high speed, such as 5 m to 200 m per minute, preferably 10 m to 180 m per minute, as the transport speed of the separator film 1, for example, foreign matter is removed by this embodiment. Is possible.
- the X-ray inspection may be performed by irradiating X-rays to the slit film 3 or the slit film wound body 4 obtained through any of the above-described embodiments. By performing the X-ray inspection, it can be confirmed that the slit film 3 or the slit film wound body 4 does not contain any foreign matter.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery includes a transport path for transporting a separator film for a non-aqueous electrolyte secondary battery, and the transport path disposed and transported in the transport path.
- the distance between the first magnetic field generation source which generates a magnetic field for separating the magnetic substance adhering to the first surface of the separator film from the separator film, and the first magnetic field generation source with respect to the first surface of the separator film And a moving mechanism which is variable.
- the separator film for nonaqueous electrolyte secondary batteries which concerns on 1 aspect of this invention is the conveyance process of conveying the separator film for nonaqueous electrolyte secondary batteries,
- the 1st of the said separator film conveyed
- a first foreign matter removing step of bringing a first magnetic field generation source close to a surface and removing a magnetic body attached to the first surface of the separator film from the separator film to remove the magnetic material
- a retracting step of retracting the first magnetic field generation source when there is a risk of contacting the magnetic field generation source.
- the first magnetic field generation source In order to remove foreign matter made of magnetic material from the separator film being transported by the first magnetic field generation source, it is necessary to bring the first magnetic field generation source close to the surface of the separator film. Then, when a projection such as a joint of the separator film passes through, the projection contacts the first magnetic field generation source, the separator film is damaged, or the peeled magnetic substance reattaches to the separator film. obtain.
- the moving mechanism is preferably a linear moving mechanism that moves the first magnetic field generation source by linear motion.
- the first magnetic field generation source is preferably retracted by linear motion.
- the moving mechanism rotates the first magnetic field generation source by rotational movement about a rotation axis parallel to the surface of the separator film. It is preferable that it is a rotating mechanism to move.
- the first magnetic field is generated by rotational movement about a rotation axis parallel to the surface of the separator film. It is preferable to withdraw the source.
- a magnetic material attached to the second surface of the separator film disposed and transported in the transport path is obtained from the separator film It is preferable that a second magnetic field generation source that generates a magnetic field for separation be provided, and the rotation mechanism integrally rotate the first and second magnetic field generation sources.
- the second magnetic field generation source is brought close to the second surface of the separator film conveyed. It is preferable to include a second foreign matter removing step of peeling off and removing the magnetic substance adhering to the two surfaces from the separator film, and in the retracting step, integrally rotating the first and second magnetic field generation sources .
- the first magnetic field generation source is formed by a plurality of magnets and a plurality of yokes interposed between the magnets along the separator film. It is preferable that they are one or more magnet bars configured to be linearly arranged in the same plane.
- the first magnetic field generation source includes a plurality of magnets and a plurality of yokes interposed between the magnets. It is preferable that they are one or more magnet bars configured to be linearly arranged in a plane along the surface.
- the magnetic flux can be concentrated in the vicinity of the yoke by the interposition of the yoke, and the foreign substance removal effect can be enhanced in the portion where the magnetic flux is concentrated.
- linearly arranged is preferably linearly arranged, but is not necessarily limited to the linear arranged.
- At least one of the one magnet bar or the plurality of magnet bars has the linear arrangement direction of the separator It is preferable that the film is disposed so as to be inclined with respect to the direction perpendicular to the film transport direction.
- At least one of the one magnet bar or the plurality of magnet bars has the linear arrangement direction It is preferable that the separator film is disposed to be inclined with respect to the direction perpendicular to the transport direction.
- the magnet bars As described above, by arranging the magnet bars to be inclined, the distance between the yokes as viewed in the transport direction of the separator film is narrowed as compared with the case where the magnet bars are not arranged. Therefore, in the width direction of the separator film, it is possible to more densely form the region having a high removal effect of foreign matter.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery at least two of the plurality of magnet bars are in the transport direction of the separator film on one side of the separator film. It is preferable that the yokes of the other magnet bar be positioned between the yokes of the one magnet bar when viewed in a row and in the transport direction.
- At least two of the plurality of magnet bars transport the separator film on one side of the separator film. It is preferable that the yokes of the other magnet bar be positioned between the yokes of the one magnet bar when viewed in the transport direction and when viewed in the transport direction.
- the yokes of one magnet bar when viewed in the transport direction of the separator film, the yokes of one magnet bar can be complemented by the yokes of the other magnet bar. Therefore, in the width direction of the separator film, it is possible to more densely form the region having a high removal effect of foreign matter.
- a separator film transport apparatus for a non-aqueous electrolyte secondary battery includes a transport path for transporting a separator film for a non-aqueous electrolyte secondary battery, and the first and the first separator films in the transport path.
- the first and second magnetic field generation sources are disposed on the second surface side and generate a magnetic field for peeling the magnetic substance attached to the separator film conveyed from the separator film.
- the separator film for nonaqueous electrolyte secondary batteries which concerns on 1 aspect of this invention is the conveyance process of conveying the separator film for nonaqueous electrolyte secondary batteries, The 1st of the said separator film conveyed And a foreign matter removing step of bringing the first and second magnetic field sources close to the second surface and removing the magnetic substance adhering to the first and second surfaces of the separator film from the separator film and removing the magnetic material. ,including.
- the first and second magnetic field generation sources are disposed at mutually offset positions in the transport direction of the separator film. .
- the first and second magnetic field generation sources are disposed at mutually offset positions in the transport direction of the separator film. Is preferred.
- the first and second magnetic field generation sources generate magnetic fields in which the distribution in the cross direction with respect to the transport direction of the separator film repeats strength and weakness It is preferable that the strong range of the magnetic field of the second magnetic field generation source be located in the weak range of the magnetic field of the first magnetic field generation source when viewed in the transport direction of the separator film.
- the first and second magnetic field generation sources are magnetic fields in which the distribution in the cross direction to the transport direction of the separator film repeats strength and weakness It is preferable that the strong range of the magnetic field of the second magnetic field generation source be located in the weak range of the magnetic field of the first magnetic field generation source when viewed in the transport direction of the separator film.
- the transport path includes a first transport roller in contact with the first surface of the separator film, and the second magnetic field generation source Is preferably disposed at a position facing the first conveyance roller.
- the transport path for transporting the separator film includes a first transport roller in contact with the first surface of the separator film.
- the second magnetic field generation source is disposed at a position facing the first conveyance roller.
- the separator film for the non-aqueous electrolyte secondary battery is easily vibrated during transportation because of its thinness. When it vibrates, the distance between the separator film surface and the magnetic field generation source fluctuates, and it becomes difficult to maintain an appropriate foreign matter removal effect. By arranging the magnetic field generation source at a position facing the transport roller, the occurrence of the above problem can be suppressed.
- the transport path includes a second transport roller in contact with the second surface of the separator film, and the first magnetic field generation source Is preferably disposed at a position facing the second transport roller.
- the transport path includes a second transport roller in contact with the second surface of the separator film, and the first magnetic field It is preferable that the generation source be disposed at a position facing the second conveyance roller.
- the above-mentioned effect can be produced on both sides of a separator film.
- the first and second transport rollers are in contact with the first and second surfaces of the separator film, and are configured by nonmagnetic materials. It is preferable to have an outer peripheral member.
- the first and second transport rollers are in contact with the first and second surfaces of the separator film, respectively. It is preferable to have an outer peripheral member constituted by
- the influence of the first and second conveyance rollers on the magnetic field generated by the magnetic field generation source can be suppressed. Therefore, the fall of the foreign material removal effect by the 1st and 2nd magnetic field generation source can be controlled.
- the transport paths are respectively disposed along the transport direction of the separator film, and a plurality of transport paths are in contact with the first surface of the separator film. It is preferable that the first magnetic field generation source is disposed between the plurality of first conveying rollers adjacent to each other.
- the transport paths for transporting the separator film are disposed along the transport direction of the separator film. It is preferable that a plurality of first transport rollers that respectively contact the first surface are provided, and the first magnetic field generation source be disposed between the plurality of first transport rollers adjacent to each other.
- the influence of the first conveyance roller on the magnetic field generated by the magnetic field generation source can be suppressed (because the first conveyance roller itself or a peripheral member thereof may be made of a magnetic material). Therefore, the fall of the foreign material removal effect by the 1st magnetic field generation source can be controlled.
- the transport paths are respectively disposed along the transport direction of the separator film, and a plurality of transport paths are in contact with the second surface of the separator film. It is preferable that the second conveyance roller is provided, and the second magnetic field generation source is disposed between the plurality of second conveyance rollers adjacent to each other.
- the transport paths are respectively disposed along the transport direction of the separator film, and are each disposed on the second surface of the separator film. It is preferable that a plurality of second transport rollers in contact with each other be provided, and the second magnetic field generation source be disposed between the plurality of second transport rollers adjacent to each other.
- the first and second slit portions for slitting the separator film along the transport direction are provided in the middle of the transport path.
- at least one of the magnetic field generation sources is disposed downstream of the slit portion.
- a slit portion for slitting the separator film along the conveyance direction is provided in the middle of the conveyance path for conveying the separator film.
- at least one of the first and second magnetic field generation sources is disposed downstream of the slit portion.
- the slit portion is likely to generate metallic foreign matter including a magnetic material.
- the other of the first and second magnetic field generation sources be disposed downstream of the slit portion.
- the other of the first and second magnetic field generation sources is also disposed downstream of the slit portion.
- the above-mentioned effect can be produced on both sides of a separator film.
- a foreign matter detection unit for detecting foreign substances attached to the separator film is provided in the middle of the transport path, and the first and second magnetic fields are provided.
- at least one of the generation sources is disposed upstream of the foreign matter detector.
- a foreign matter detection unit for detecting foreign matter attached to the separator film is provided in the middle of the transport path for transporting the separator film. It is preferable that at least one of the first and second magnetic field generation sources be disposed upstream of the foreign matter detection unit.
- the transport path includes a nip roller sandwiching the separator film from the first and second surfaces, It is preferable that at least one of the second magnetic field generation sources is disposed upstream of the nip roller.
- the transport path for transporting the separator film is a nip roller sandwiching the separator film from the first and second surfaces. It is preferable that at least one of the first and second magnetic field generation sources be disposed upstream of the nip roller.
- the magnetic material can be removed by the magnetic field generation source before the magnetic material is pressure-bonded to the separator film surface by the nip roller. Therefore, it is possible to suppress a drop in the foreign matter removal effect by the magnetic field generation source.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery adheres to a transport path for transporting a separator film for a non-aqueous electrolyte secondary battery, and the above-mentioned separator film to be transported
- a magnetic field generation unit provided with a magnetic field generation source for generating a magnetic field for separating a magnetic body from the separator film, and a cover made of a nonmagnetic material surrounding the magnetic field generation source, and arranged detachably in the transport path; Is equipped.
- the method further includes the step of transporting the separator film for the non-aqueous electrolyte secondary battery, and the surface of the separator film transported. And a foreign matter removing step of bringing a magnetic field generation unit into close proximity and removing the magnetic material adhering to the surface of the separator film from the separator film to remove the magnetic material from the separator film.
- a magnetic field generation source for generating a magnetic field for peeling off the film, and a cover made of a nonmagnetic material surrounding the magnetic field generation source are provided, and are detachably disposed in a transport path for transporting the separator film.
- the magnetic field generation unit when the magnetic field generation unit is removed from the transport path, or when the magnetic field generation unit is attached to the transport path, the magnetic field generation unit is composed of other magnetic field generation units and magnetic bodies constituting the transport path.
- the strong adsorption to the member can be suppressed by the presence of the cover.
- the magnetic field generation unit has a longitudinally extending linear shape, and the transport path is the magnetic field generation unit.
- a guide is provided for sliding along the longitudinal direction.
- the magnetic field generation unit can be easily attached and detached by the slide operation.
- the guide supports the magnetic field generation unit on the side of the magnetic field generation unit opposite to the side facing the separator film. Is preferred.
- the magnetic field generation unit can be disposed upward from the lower surface side of the separator film.
- the guide may support the magnetic field generation unit on the same side as the side facing the separator film in the magnetic field generation unit. preferable.
- the magnetic field generation unit can be disposed downward from the upper surface side of the separator film.
- the rigidity of the outer surface of the cover is lower than the rigidity of the outer surface of the magnetic field generation source.
- the magnetic field generation unit when the magnetic field generation unit is removed from the transport path, or when the magnetic field generation unit is attached to the transport path, the magnetic field generation unit is composed of other magnetic field generation units and magnetic bodies constituting the transport path. Even in the case of a collision caused by being drawn to a member, it is possible to suppress the occurrence of damage to each part and injury to the worker.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery preferably includes another magnetic field generation unit which is a spare for the magnetic field generation unit.
- the cover is formed with an opening in a portion facing the separator film in the magnetic field generation source and other than the portion facing the opening It is preferable to surround the part of.
- the magnetic field source and the separator film can be brought close to each other, and foreign matter consisting of magnetic material can be effectively removed. it can.
- the magnetic field generation source has a linearly extending longitudinal shape
- the cover has the magnetic field generation source inside thereof. It is preferable to hold the disc so as to be rotatable about an axis along its longitudinal direction.
- the adhesive tape is wound around the magnetic field source from the opening while rotating the magnetic field source, and the wound adhesive tape is peeled off from the magnetic field source to remove foreign matter attached to the magnetic field source. it can. Thereby, cleaning of the magnetic field generation source can be facilitated.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery includes a transport path for transporting a separator film for a non-aqueous electrolyte secondary battery, and the transport path disposed and transported in the transport path.
- a magnetic field generation source that generates a magnetic field for separating a magnetic body attached to the separator film from the separator film, and an auxiliary mechanism that assists the separation of the magnetic body by the magnetic field generation source.
- the method further includes the step of transporting the separator film for the non-aqueous electrolyte secondary battery, and the surface of the separator film transported. And a foreign matter removing step of bringing a magnetic field generation source into close proximity and peeling off a magnetic substance adhering to the surface of the separator film from the separator film, and aiding aiding the peeling of the magnetic substance by the magnetic field generation source And a process.
- the assistance mechanism which assists peeling
- the mechanism which exerts the effect
- the auxiliary mechanism may be a gas discharge mechanism that assists the peeling of the magnetic body by spraying a gas onto the separator film. preferable.
- the separation of the magnetic body can be assisted by the wind pressure caused by the flow of gas.
- the gas discharge mechanism is a gas directed from the upstream side and / or the downstream side in the transport direction of the separator film toward the magnetic field generation source It is preferable to discharge the
- the separator film is directed from the upstream side and / or downstream side in the transport direction of the separator film to the magnetic field generation source side.
- the gas is discharged.
- the separator film transport apparatus for a non-aqueous electrolyte secondary battery includes a moving mechanism for changing the distance of the magnetic field generation source with respect to the separator film, the movement mechanism including the magnetic field generation source It is preferable to move the gas discharge mechanism integrally.
- the method further includes a moving step of changing a distance of the magnetic field generation source with respect to the separator film. It is preferable to move the generation source and the mechanism for discharging the gas integrally.
- the auxiliary mechanism is configured to partially cover the transport path so that the surface of the separator film on the magnetic field generation source side is convex. It is preferable that it is a mechanism which makes it the conveyance path along a curve.
- the separator film in the auxiliary step, is made convex so that the surface on the magnetic field generation source side of the separator film is convex. It is preferable that a part of the conveyance path to be conveyed be a conveyance path along a curve.
- the separation of the magnetic body can be assisted by the centrifugal force.
- the auxiliary mechanism is preferably a vibration mechanism that vibrates the separator film.
- the peeling of the magnetic body can be assisted by vibration (for example, ultrasonic vibration).
- the auxiliary mechanism opposes the energy for assisting the peeling of the magnetic body to the magnetic field generation source in the separator film. It is preferred to reach the area.
- energy for assisting the peeling of the magnetic material is the magnetic field generation source of the separator film. It is preferable to reach the area facing the
- the energy (by the auxiliary process) from the auxiliary mechanism reaches the region where the magnetic field is applied to the separator film, so the effect of removing the foreign matter made of the magnetic material can be further enhanced.
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Abstract
Description
まず、本明細書において用いる用語について説明すれば、以下のとおりである。
2.セパレータフィルムの仕様と製造工程
セパレータフィルムの製造工程は、混練工程、圧延工程、除去工程、延伸工程、塗工工程、原反捲回体作成工程、スリット工程、スリットフィルム捲回体作成工程、及び搬送工程を含んでいる。
3.異物除去のための要素発明
〔マグネットバーの構成〕
図2は、マグネットバー12の具体的な構成例を示す断面図である。図2には、マグネットバー12の、図1におけるセパレータフィルム1に沿った一断面を示している。図2に示すとおり、マグネットバー12は、複数の磁石121とこれら磁石121の間に介在する複数のヨーク122とが、セパレータフィルム1に沿った面内において線状に配列されて構成される。マグネットバー12は、複数の磁石121及び複数のヨーク122を収容するケース123を有している。このケース123は、非磁性体のステンレス鋼(SUS)をパイプ状に形成したものである。ケース123を構成する材料は、非磁性体のステンレス鋼に限られないが、磁石121の磁界への影響を考慮した場合、非磁性体の材料から構成されることが好ましい。
上述のとおり、マグネットバー12において、ヨーク122部分に磁束が集中し、磁束密度が高くなる。逆に、ヨーク122間においては磁束密度が低くなる。この磁束密度の低い部分では、高い部分と比較して、異物の除去効果が低くなってしまう。磁束密度の低い部分を狭くするためには、磁石の厚み(磁極方向の厚み。)を薄くすることも考えられるが、例えば1mm未満など薄くし過ぎるとマグネットバー12の製造が困難となるため現実的でない。
セパレータフィルム1は第1及び第2面を有しているため、マグネットバー12の配置の基本は、第1及び第2面側それぞれに配置することになる。ただし、何らかの事情により一方の面に対してのみ異物の除去が必要な場合には、その一方の面側のみにマグネットバー12を配置してもよい。
マグネットバー12をセパレータフィルム1の搬送路11に配置するためには、搬送路11に備えられた搬送ローラーとの配置関係を考慮する必要がある。
上述のとおり、マグネットバー12は、セパレータフィルム1の表面に近づけて配置する必要がある。セパレータフィルム1は、マグネットバー12との距離に対して十分小さい厚みを有し、基本的には一様な形状を有するものである。そのため、セパレータフィルム1の搬送中において、セパレータフィルム1が振動しなければ、セパレータフィルム1とマグネットバー12との距離は一定に保たれることになる。
セパレータフィルム1に付着した、磁性体からなる異物は、その付着の程度によってはマグネットバー12による磁界の影響のみではセパレータフィルム1から剥離することができない場合がある。そこで、マグネットバー12による異物の剥離を補助する補助機構(以下、異物剥離補助機構ということがある)を設けることが望ましい。ここで、「剥離を補助する補助機構」とは、剥離しやすくなる作用を及ぼす機構を指す。以下では主に、補助機構の一態様としてのエアノズル(気体吐出機構)18について説明する。
・壁(高密度ポリエチレン(HDPE):セパレータフィルム1に対応)
ヤング率:0.7GPa
ポアソン比:0.42
・粒子(異物に対応する。SUS304の屑を想定し、下記の物性値を規定した。)
ヤング率:210GPa
ポアソン比:0.28
粒子間の摩擦係数:0.52
密度:7800kg/m3
比透磁率:30
(A)直径50μmの球状粒子を2個連結させたもの、及び(B)直径40μmの球状粒子を2個連結させたもの、の2つの条件を使い分ける
・壁-粒子間
摩擦係数:0.67
Hamaker定数:10-19J
分離距離:0.4nm
・磁石(マグネットバー12に対応)の磁束密度:1T(1万ガウス)
・エアアシスト(エアノズル18に対応)
壁面の法線方向に対する吐出角度:(C)5°、(D)15°、(E)30°、及び(F)45°、の4つの条件を使い分ける
回転中心(図14の(a)及び(b)、並びに図15の(a)及び(b)における座標(-50、0))から先端までの距離(これらの図の符号33に対応):39mm(なお、これらの図において横軸をX、縦軸をYとしたとき、座標(X、Y)とする)
エア流量:2.3×10-4m3/s(ノズル孔1個)
ノズル孔径:4mm
ノズル出口風速:18m/s
・セパレータフィルム1の搬送速度:毎分32m
・重力加速度:9.8m/s2
・真空の透磁率:1.26×10-6N/A2
・空気粘度:1.82×10-5Pa・s
図14の(a)及び図15の(a)には、磁界発生ユニット14に対して、セパレータフィルム1の搬送方向における上流側に、エアノズル18が配置されている例を示している。図14の(b)、図15の(b)、及び図16には、磁界発生ユニット14に対して、セパレータフィルム1の搬送方向における下流側に、エアノズル18が配置されている例を示している。そして、エアノズル18の先端が磁界発生ユニット14側を向くように、エアノズル18の吐出角度(セパレータフィルム1の面の法線方向に対する吐出角度)が定められている。
4.スリット装置への適用例
図17は、セパレータフィルム1のスリット装置102に対してマグネットバー12を適用した例を示す図である。図17に基づき、セパレータフィルム1のスリット装置102に対してマグネットバー12を適用した例について説明する。
本発明の一態様に係る非水電解液二次電池用セパレータフィルム搬送装置は、非水電解液二次電池用のセパレータフィルムを搬送する搬送路と、上記搬送路に配置され、搬送される上記セパレータフィルムの第1面に付着している磁性体を上記セパレータフィルムから剥離するための磁界を発生させる第1磁界発生源と、上記セパレータフィルムの第1面に対する上記第1磁界発生源の距離を可変とする移動機構と、を備えている。
11 搬送路
12 マグネットバー
12a 第1マグネットバー
12b 第2マグネットバー
13、13a、及び13b カバー
14、14a、及び14b 磁界発生ユニット
15、15a、及び15b ガイド
16、16a、及び16b 開口
17 エアシリンダー(移動機構、直動機構)
18 エアノズル(補助機構、気体吐出機構)
19 回転機構(移動機構)
40、41 ニップローラー
42 スリット部
101 搬送装置(非水電解液二次電池用セパレータフィルム搬送装置)
102 スリット装置
111 搬送ローラー
111a 第1搬送ローラー
111b 第2搬送ローラー
121 磁石
122 ヨーク
123 ケース
191 回転軸
Claims (61)
- 非水電解液二次電池用のセパレータフィルムを搬送する搬送路と、
上記搬送路に配置され、搬送される上記セパレータフィルムの第1面に付着している磁性体を上記セパレータフィルムから剥離するための磁界を発生させる第1磁界発生源と、
上記セパレータフィルムの第1面に対する上記第1磁界発生源の距離を可変とする移動機構と、
を備えている非水電解液二次電池用セパレータフィルム搬送装置。 - 上記移動機構は、直線運動により上記第1磁界発生源を移動させる直動機構である請求項1に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記移動機構は、上記セパレータフィルムの表面と平行な回転軸を中心とする回転運動により上記第1磁界発生源を移動させる回転機構である請求項1に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記搬送路に配置され、搬送される上記セパレータフィルムの第2面に付着している磁性体を上記セパレータフィルムから剥離するための磁界を発生させる第2磁界発生源を備え、
上記回転機構は、上記第1及び第2磁界発生源を一体的に回転させる請求項3に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記第1磁界発生源は、複数の磁石とこれら磁石の間に介在する複数のヨークとが上記セパレータフィルムに沿った面内において線状に配列されて構成される1つ又は複数のマグネットバーである請求項1から4の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記1つのマグネットバー又は上記複数のマグネットバーのうちの少なくとも1つは、上記線状の配列の方向が上記セパレータフィルムの搬送方向に対する垂直方向に対して傾斜するように配置されている請求項5に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記複数のマグネットバーのうちの少なくとも2つは、上記セパレータフィルムの一方の面側において上記セパレータフィルムの搬送方向に並び、かつその搬送方向に見たときに一方のマグネットバーのヨーク間に他方のマグネットバーのヨークが位置するように配置されている請求項5に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 非水電解液二次電池用のセパレータフィルムを搬送する搬送工程と、
搬送される上記セパレータフィルムの第1面に対して第1磁界発生源を近接させ、上記セパレータフィルムの第1面に付着している磁性体を上記セパレータフィルムから剥離して除去する第1異物除去工程と、
上記セパレータフィルムが上記第1磁界発生源に接触するおそれがあるときに、上記第1磁界発生源を退避させる退避工程と、
を含む非水電解液二次電池用セパレータフィルム製造方法。 - 上記退避工程では、直線運動により上記第1磁界発生源を退避させる請求項8に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記退避工程では、上記セパレータフィルムの表面と平行な回転軸を中心とする回転運動により上記第1磁界発生源を退避させる請求項8に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 搬送される上記セパレータフィルムの第2面に対して第2磁界発生源を近接させ、上記セパレータフィルムの第2面に付着している磁性体を上記セパレータフィルムから剥離して除去する第2異物除去工程を含み、
上記退避工程では、上記第1及び第2磁界発生源を一体的に回転させる請求項10に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 上記第1磁界発生源は、複数の磁石とこれら磁石の間に介在する複数のヨークとが上記セパレータフィルムに沿った面内において線状に配列されて構成される1つ又は複数のマグネットバーである請求項8から11の何れか1項に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記1つのマグネットバー又は上記複数のマグネットバーのうちの少なくとも1つは、上記線状の配列の方向が上記セパレータフィルムの搬送方向に対する垂直方向に対して傾斜するように配置されている請求項12に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記複数のマグネットバーのうちの少なくとも2つは、上記セパレータフィルムの一方の面側において上記セパレータフィルムの搬送方向に並び、かつその搬送方向に見たときに一方のマグネットバーのヨーク間に他方のマグネットバーのヨークが位置するように配置されている請求項12に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 非水電解液二次電池用のセパレータフィルムを搬送する搬送路と、
上記搬送路における上記セパレータフィルムの第1及び第2面側にそれぞれ配置され、搬送される上記セパレータフィルムに付着している磁性体を上記セパレータフィルムから剥離するための磁界を発生させる第1及び第2磁界発生源と、
を備えている非水電解液二次電池用セパレータフィルム搬送装置。 - 上記第1及び第2磁界発生源は、上記セパレータフィルムの搬送方向において互いにずれる位置に配置されている請求項15に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 第1及び第2磁界発生源は、それぞれ上記セパレータフィルムの搬送方向に対する交差方向の分布が強弱を繰り返す磁界を発生させるとともに、上記セパレータフィルムの搬送方向に見たときに第1磁界発生源の磁界の弱い範囲に第2磁界発生源の磁界の強い範囲が位置するように配置されている請求項15又は16に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記搬送路は、上記セパレータフィルムの第1面に接する第1搬送ローラーを備えており、
上記第2磁界発生源は、上記第1搬送ローラーに対向する位置に配置されている請求項15から17の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記搬送路は、上記セパレータフィルムの第2面に接する第2搬送ローラーを備えており、
上記第1磁界発生源は、上記第2搬送ローラーに対向する位置に配置されている請求項18に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記第1及び第2搬送ローラーは、上記セパレータフィルムのそれぞれ第1及び第2面に接し、非磁性体によって構成される外周部材を有する請求項19に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記搬送路は、上記セパレータフィルムの搬送方向に沿ってそれぞれ配置され、上記セパレータフィルムの第1面にそれぞれ接する複数の第1搬送ローラーを備えており、
上記第1磁界発生源は、互いに隣り合う上記複数の第1搬送ローラーの間に配置されている請求項15から17の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記搬送路は、上記セパレータフィルムの搬送方向に沿ってそれぞれ配置され、上記セパレータフィルムの第2面にそれぞれ接する複数の第2搬送ローラーを備えており、
上記第2磁界発生源は、互いに隣り合う上記複数の第2搬送ローラーの間に配置されている請求項21に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記セパレータフィルムをその搬送方向に沿ってスリットするスリット部を上記搬送路の途中に備え、
上記第1及び第2磁界発生源の少なくとも一方は、上記スリット部の下流側に配置されている請求項15から22の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記第1及び第2磁界発生源の他方も、上記スリット部の下流側に配置されている請求項23に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記セパレータフィルムに付着した異物を検知する異物検知部を上記搬送路の途中に備え、
上記第1及び第2磁界発生源の少なくとも一方は、上記異物検知部の上流側に配置されている請求項15から24の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記搬送路は、上記セパレータフィルムを上記第1及び第2面側から挟むニップローラーを備えており、
上記第1及び第2磁界発生源の少なくとも一方は、上記ニップローラーの上流側に配置されている請求項15から25の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 非水電解液二次電池用のセパレータフィルムを搬送する搬送工程と、
搬送される上記セパレータフィルムの第1及び第2面に対して第1及び第2磁界発生源を近接させ、上記セパレータフィルムの第1及び第2面に付着している磁性体を上記セパレータフィルムから剥離して除去する異物除去工程と、
を含む非水電解液二次電池用セパレータフィルム製造方法。 - 上記第1及び第2磁界発生源は、上記セパレータフィルムの搬送方向において互いにずれる位置に配置されている請求項27に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 第1及び第2磁界発生源は、それぞれ上記セパレータフィルムの搬送方向に対する交差方向の分布が強弱を繰り返す磁界を発生させるとともに、上記セパレータフィルムの搬送方向に見たときに第1磁界発生源の磁界の弱い範囲に第2磁界発生源の磁界の強い範囲が位置するように配置されている請求項27又は28に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記セパレータフィルムを搬送する搬送路は、上記セパレータフィルムの第1面に接する第1搬送ローラーを備えており、
上記第2磁界発生源は、上記第1搬送ローラーに対向する位置に配置されている請求項27から29の何れか1項に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 上記搬送路は、上記セパレータフィルムの第2面に接する第2搬送ローラーを備えており、
上記第1磁界発生源は、上記第2搬送ローラーに対向する位置に配置されている請求項30に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 上記第1及び第2搬送ローラーは、上記セパレータフィルムのそれぞれ第1及び第2面に接し、非磁性体によって構成される外周部材を有する請求項31に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記セパレータフィルムを搬送する搬送路は、上記セパレータフィルムの搬送方向に沿ってそれぞれ配置され、上記セパレータフィルムの第1面にそれぞれ接する複数の第1搬送ローラーを備えており、
上記第1磁界発生源は、互いに隣り合う上記複数の第1搬送ローラーの間に配置されている請求項27から29の何れか1項に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 上記搬送路は、上記セパレータフィルムの搬送方向に沿ってそれぞれ配置され、上記セパレータフィルムの第2面にそれぞれ接する複数の第2搬送ローラーを備えており、
上記第2磁界発生源は、互いに隣り合う上記複数の第2搬送ローラーの間に配置されている請求項33に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 上記セパレータフィルムをその搬送方向に沿ってスリットするスリット部を上記セパレータフィルムを搬送する搬送路の途中に備え、
上記第1及び第2磁界発生源の少なくとも一方は、上記スリット部の下流側に配置されている請求項27から34の何れか1項に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 上記第1及び第2磁界発生源の他方も、上記スリット部の下流側に配置されている請求項35に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記セパレータフィルムに付着した異物を検知する異物検知部を上記セパレータフィルムを搬送する搬送路の途中に備え、
上記第1及び第2磁界発生源の少なくとも一方は、上記異物検知部の上流側に配置されている請求項27から36の何れか1項に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 上記セパレータフィルムを搬送する搬送路は、上記セパレータフィルムを上記第1及び第2面側から挟むニップローラーを備えており、
上記第1及び第2磁界発生源の少なくとも一方は、上記ニップローラーの上流側に配置されている請求項27から37の何れか1項に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 非水電解液二次電池用のセパレータフィルムを搬送する搬送路と、
搬送される上記セパレータフィルムに付着している磁性体を上記セパレータフィルムから剥離するための磁界を発生させる磁界発生源、及び上記磁界発生源を囲む非磁性体からなるカバーを備え、上記搬送路に着脱可能に配置された磁界発生ユニットと、
を備えている非水電解液二次電池用セパレータフィルム搬送装置。 - 上記磁界発生ユニットは、直線状に延びる長手形状を有しており、
上記搬送路は、上記磁界発生ユニットをその長手方向に沿ってスライドして装着するためのガイドを備えている請求項39に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記ガイドは、上記磁界発生ユニットにおける上記セパレータフィルムに対向する側とは反対側において上記磁界発生ユニットを支持する請求項40に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記ガイドは、上記磁界発生ユニットにおける上記セパレータフィルムに対向する側と同じ側において上記磁界発生ユニットを支持する請求項40に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記カバーは、その外面の剛性が上記磁界発生源の外面の剛性よりも低い請求項39から42の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記磁界発生ユニットのスペアとなる他の磁界発生ユニットを備えている請求項39から43の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記カバーは、上記磁界発生源における上記セパレータフィルムと対向する部分に開口が形成されているとともに上記対向する部分以外の部分を囲む請求項39から44の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記磁界発生源は、直線状に延びる長手形状を有しており、
上記カバーは、その内側において上記磁界発生源をその長手方向に沿った軸を中心として回転可能に保持する請求項45に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 非水電解液二次電池用のセパレータフィルムを搬送する搬送工程と、
搬送される上記セパレータフィルムの面に対して磁界発生ユニットを近接させ、上記セパレータフィルムの面に付着している磁性体を上記セパレータフィルムから剥離して除去する異物除去工程とを含み、
上記磁界発生ユニットは、上記磁性体を上記セパレータフィルムから剥離するための磁界を発生させる磁界発生源、及び上記磁界発生源を囲む非磁性体からなるカバーを備え、上記セパレータフィルムを搬送する搬送路に着脱可能に配置される非水電解液二次電池用セパレータフィルム製造方法。 - 非水電解液二次電池用のセパレータフィルムを搬送する搬送路と、
上記搬送路に配置され、搬送される上記セパレータフィルムに付着している磁性体を上記セパレータフィルムから剥離するための磁界を発生させる磁界発生源と、
上記磁界発生源による上記磁性体の剥離を補助する補助機構と、
を備えている非水電解液二次電池用セパレータフィルム搬送装置。 - 上記補助機構は、気体を上記セパレータフィルムに吹き付けることにより上記磁性体の剥離を補助する気体吐出機構である請求項48に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記気体吐出機構は、上記セパレータフィルムの搬送方向上流側及び/又は下流側から上記磁界発生源側に向けて気体を吐出する請求項49に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記セパレータフィルムに対する上記磁界発生源の距離を可変とする移動機構を備え、
上記移動機構は、上記磁界発生源と上記気体吐出機構とを一体的に移動させる請求項49又は50に記載の非水電解液二次電池用セパレータフィルム搬送装置。 - 上記補助機構は、上記セパレータフィルムの上記磁界発生源側の面が凸になるよう、上記搬送路の一部を曲線に沿った搬送経路とする機構である請求項48に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記補助機構は、上記セパレータフィルムに振動を与える振動機構である請求項48に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 上記補助機構は、上記磁性体の剥離を補助するためのエネルギーを、上記セパレータフィルムにおける上記磁界発生源に対向する領域に到達させる請求項48から53の何れか1項に記載の非水電解液二次電池用セパレータフィルム搬送装置。
- 非水電解液二次電池用のセパレータフィルムを搬送する搬送工程と、
搬送される上記セパレータフィルムの面に対して磁界発生源を近接させ、上記セパレータフィルムの面に付着している磁性体を上記セパレータフィルムから剥離して除去する異物除去工程と、
上記磁界発生源による上記磁性体の剥離を補助する補助工程と、
を含む非水電解液二次電池用セパレータフィルム製造方法。 - 上記補助工程にて、気体を上記セパレータフィルムに吹き付けることにより上記磁性体の剥離を補助する請求項55に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記補助工程にて、上記セパレータフィルムの搬送方向上流側及び/又は下流側から上記磁界発生源側に向けて気体を吐出する請求項56に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記セパレータフィルムに対する上記磁界発生源の距離を可変とする移動工程を含み、
上記移動工程にて、上記磁界発生源と上記気体を吐出する機構とを一体的に移動させる請求項56又は57に記載の非水電解液二次電池用セパレータフィルム製造方法。 - 上記補助工程にて、上記セパレータフィルムの上記磁界発生源側の面が凸になるよう、上記セパレータフィルムを搬送する搬送路の一部を曲線に沿った搬送経路とする請求項55に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記補助工程にて、上記セパレータフィルムに振動を与える請求項55に記載の非水電解液二次電池用セパレータフィルム製造方法。
- 上記補助工程にて、上記磁性体の剥離を補助するためのエネルギーを、上記セパレータフィルムにおける上記磁界発生源に対向する領域に到達させる請求項55から60の何れか1項に記載の非水電解液二次電池用セパレータフィルム製造方法。
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CN111295778B (zh) | 2022-10-21 |
US11491494B2 (en) | 2022-11-08 |
JP7325330B2 (ja) | 2023-08-14 |
JPWO2019087892A1 (ja) | 2020-11-26 |
CN111295778A (zh) | 2020-06-16 |
US20210184310A1 (en) | 2021-06-17 |
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KR20200081412A (ko) | 2020-07-07 |
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