WO2011093368A1 - ペースト式鉛蓄電池用極板の製造方法及びその製造装置 - Google Patents
ペースト式鉛蓄電池用極板の製造方法及びその製造装置 Download PDFInfo
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- WO2011093368A1 WO2011093368A1 PCT/JP2011/051577 JP2011051577W WO2011093368A1 WO 2011093368 A1 WO2011093368 A1 WO 2011093368A1 JP 2011051577 W JP2011051577 W JP 2011051577W WO 2011093368 A1 WO2011093368 A1 WO 2011093368A1
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- electrode plate
- load
- paste
- forming roller
- region portion
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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
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/20—Processes of manufacture of pasted electrodes
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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
- H01M10/06—Lead-acid 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
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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
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/72—Grids
- H01M4/73—Grids for lead-acid accumulators, e.g. frame plates
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/10—Battery-grid making
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/49112—Electric battery cell making including laminating of indefinite length material
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/5313—Means to assemble electrical device
- Y10T29/53135—Storage cell or battery
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/5313—Means to assemble electrical device
- Y10T29/532—Conductor
- Y10T29/53204—Electrode
Definitions
- the present invention relates to a method for producing an electrode plate for a paste-type lead storage battery and a production apparatus used for the production.
- Paste type lead storage battery plates are conventionally manufactured as follows.
- an active material containing lead powder as a main component and other required components is kneaded with dilute sulfuric acid or water to prepare a paste-like active material.
- the adjusted paste-like active material is filled into a grid-shaped lead alloy current collector to form a filled electrode plate.
- the electrode plate surface of the filled electrode plate is pressed to obtain an electrode plate with improved paste-like active material filling properties.
- the filled electrode plate is dried.
- the current collector has a relatively thick frame bone and a relatively thin inner bone arranged integrally in a lattice shape inside the frame bone.
- Patent Document 1 a current collector placed on a belt conveyor is sequentially transported to a current collector passing under a hopper containing a pasty active material.
- a filled electrode plate is prepared by filling a paste-like active material. Then, this filled electrode plate is passed through a forming roller device, and the electrode plate surface is pressed with a uniform pressure to produce an electrode plate with suppressed variation in thickness.
- the pressure press load
- the forming roller is pressurized with one or two cylinders that operate at a common pressure.
- Patent Document 2 in order to make the paste-like active material sufficiently wrap around the lower surface side (the side opposite to the filling surface) of the current collector, there is a gap between the belt conveyor and the molding roller.
- a roller for improving the back side is disposed.
- the back improvement roller has a hard net on its peripheral surface.
- the upper surface of the net is covered with a thin cloth or thin film.
- the paste-like active material filled in the current collector is pushed into the gap, and the thin film covering the net is bent, and at the same time, the paste-like active material is filled in the bent portion of the thin film. Then, the paste-like active material enters between the lower surface side of the inner bone of the current collector and the back surface improving roller, and the paste-like active material is filled on the lower surface side of the current collector. As a result, an electrode plate in which the inner bone is not exposed on the lower surface side of the current collector is manufactured.
- Patent Document 1 is effective in suppressing the thickness variation of the electrode plate by making the press of the electrode plate uniform.
- a collector body bone may deform
- the hard net since the hard net is not necessarily arranged at a position that supports the bones in the current collector, the hard net may obstruct the filling property of the paste-like active material on the lower surface side of the electrode plate.
- the location where the hard net supports the current collector bone is problematic in that the current collector bone is exposed at the trace where the hard net is removed.
- a paste electrode active material is filled into a current collector that passes under a filling machine including a hopper that contains a paste active material to form a filled electrode plate. Make it. Thereafter, while the pasty active material after filling is soft, the electrode plate surface of the filling electrode plate is pressed while conveying the filling electrode plate.
- the electrode plate surface includes both a filling surface that is opposed to the hopper and filled with the paste-like active material by the hopper, and an opposite electrode plate lower surface facing the filling surface in the thickness direction. It is natural to dry the filled electrode plate after pressing.
- the first region portion of the electrode plate surface positioned on one side of the width direction orthogonal to the transfer direction for transferring the packed substrate and the orthogonal direction orthogonal to the electrode plate surface is emphasized (
- the third pressing step for pressing the first and second region portions over the entire width direction is performed at least once. At the end of the pressing process, a third pressing process is performed.
- the paste-like active material that is still in a soft state is preferentially pressed out of the first region portion and the second region portion that are aligned in the width direction of the filled electrode plate. It flows from the region portion side to the region portion side that is not pressed. Then, in the third pressing step, the paste-like active material flows over the entire width direction of the filled electrode plate so that the paste-like active material has a substantially uniform filling amount.
- the lower surface side of the electrode plate (the filling surface filled with the pasty active material) due to the flow of the pasty active material
- the inner bone of the current collector on the opposite side is not covered and exposed with the paste-like active material.
- the shape and dimensions are determined so that at least the end face in the thickness direction that does not face the filling machine for the inner bone is located inside the virtual plane including the end face in the thickness direction that does not face the filling machine for the frame bone. If this is the case, this effect is more certain.
- the press load of the first region portion is made larger than the press load of the second region portion
- the second region The press load of the portion is made larger than the press load of the first region portion.
- the pressing loads in the first and second region portions are made equal.
- the level of the press load is arbitrarily determined according to the paste-like active material clay.
- the first to third pressing steps include first to third moldings each including a pair of rollers arranged so as to be conveyed in the conveying direction with the filled electrode plate sandwiched in a direction orthogonal to the conveying direction of the filled electrode plate. It is carried out using a roller device.
- the first forming roller device is preferably configured so that the distance between the pair of rollers gradually increases in the direction from the first region portion to the second region portion of the electrode plate surface.
- molding roller apparatus is comprised so that the space
- the third forming roller device is configured so that the distance between the pair of rollers is constant. When such a forming roller device is used, the press load can be gradually changed, so that the paste-like active material can flow smoothly.
- the press load applied to the region of the area to be pressed heavily is the maximum load (a large load including the maximum press load that can be applied by the molding roller device to be used), and the press load that is not pressed strongly is
- the fluidity of the paste-like active material can be maximized, and the current collector on the lower surface side of the electrode plate can be further increased.
- the inner bone of the body is easily covered with the paste-like active material.
- an apparatus for manufacturing an electrode plate for a paste type lead-acid battery includes a belt conveyor that carries a current collector and sequentially conveys it, and a current collector that includes a hopper that contains a paste-like active material and passes thereunder.
- the pressing device preferentially presses the first region portion of the electrode plate surface located on one side of the conveying direction for conveying the filled electrode plate and the width direction orthogonal to the orthogonal direction orthogonal to the electrode plate surface.
- Forming roller apparatus a second forming roller apparatus that presses the second area portion of the electrode plate surface located on the other side in the width direction, and first and second area portions of the electrode plate surface And at least one third forming roller device that presses the entire length in the width direction. Then, the third forming roller device is arranged at the end of the row formed of the first to third forming rollers arranged in the transport direction.
- the first to third forming roller devices may each include a pair of rollers arranged so as to be conveyed in the conveying direction with the filling electrode plate interposed therebetween in the orthogonal direction.
- the first forming roller device is configured such that the distance between the pair of rollers gradually increases in the direction from the first region portion to the second region portion of the electrode plate surface.
- molding roller apparatus is comprised so that the space
- the third forming roller device is configured such that the distance between the pair of rollers is constant.
- the pair of rollers constituting each of the first to third forming roller devices has at least an outer peripheral portion of one roller in contact with the electrode plate surface (that is, the filling surface) facing the filling machine of the filling electrode plate with elasticity. It is preferable that it is comprised with the material which has property. If comprised in this way, the outer peripheral part of one roller of the side to press preferentially will deform
- the paste-like active material that is still in a soft state is preferentially pressed out of the first region portion and the second region portion arranged in the width direction of the filled electrode plate. It flows from the region portion side toward the region portion side that is not pressed. Then, the third forming roller device flows so that the pasty active material has a substantially uniform filling amount over the entire width direction of the filling electrode plate. Due to the flow of the paste-like active material, the inner bone of the current collector on the lower surface side of the electrode plate is not covered and exposed by the paste-like active material.
- the first to third forming roller devices may each include a load control device.
- the load control device applies controllable loads in the direction toward the filling electrode plate to both ends of the rotation shaft of one roller. Specifically, the load applied to the end of the rotating shaft on the side where the first region portion is located is larger than the load applied to the end of the rotating shaft on the side where the second region portion is located.
- the load control device of the forming roller device 1 controls the load.
- the load control device of the second forming roller device is configured such that the load applied to the end of the rotating shaft on the side where the second region portion is located is applied to the end of the rotating shaft on the side where the first region portion is located. The load is controlled so as to be larger than that.
- the load control apparatus of the 3rd forming roller apparatus controls a load so that the load applied to the both ends of a rotating shaft may become equal.
- the load control device of the first or second forming roller device is configured so that the load applied to one end of the rotating shaft is the maximum load and the load applied to the other end of the rotating shaft is the minimum load. Can be controlled.
- the load control device of the third forming roller device controls the load so that the maximum load is applied to both ends of the rotating shaft.
- the pair of rollers applies pressure not only to the pasty active material but also to the current collector.
- the current collector may be deformed. Therefore, the peripheral surface of the outer peripheral portion of the other roller of the pair of rollers may be made of an elastic material. In this case, it is preferable that the hardness of the outer peripheral part of one roller is lower than the hardness of the outer peripheral part of the other roller.
- one roller When configured in this way, one roller is deformed into a concave part in contact with the current collector by the pressure when it contacts the filling surface of the electrode plate, and the other part is in contact with the frame bone of the current collector. Projects to the inside of the area partitioned by bone. Therefore, the pasty active material is extruded from the filling surface to the lower surface side of the electrode plate. Therefore, the pasty active material filled from the upper surface of the electrode plate can be flowed to the lower surface of the electrode plate.
- the thickness of the elastic material constituting the outer peripheral portion of one roller is preferably 40 mm or more. If the thickness of the elastic material constituting the outer peripheral surface of one of the rollers is too thin, the force for pushing the paste-like active material becomes weak. Therefore, when the thickness is 40 mm or more, sufficient pressing can be performed.
- FIG. 3 is a cross-sectional view taken along line A-A ′ of FIG. 2 showing a state where the current collector of FIG. 2 is filled with a paste-like active material. It is sectional explanatory drawing which shows the state in which the thick inner bone is exposed in the electrode lower surface side.
- FIG. 1 is a diagram schematically showing a manufacturing apparatus 10 for an electrode plate for a paste-type lead storage battery according to the present embodiment.
- the manufacturing apparatus 10 includes a belt conveyor 2 that conveys the current collector 1, a filling machine 4 that includes a hopper 3 that contains a paste-like active material, and a press device 9.
- the press device 9 includes a first forming roller device 6, a second forming roller device 7, and a third forming roller device 8.
- the current collector 1 used in the present embodiment uses lead as a main raw material, and uses tin, calcium, antimony, sodium, or the like as an alloy raw material. Among these, it is preferable to use both tin and calcium as alloy raw materials. This is because the rate of self-discharge can be reduced by adding calcium. However, when calcium is added, corrosion of the current collector tends to occur. By adding tin, corrosion of the current collector can be suppressed.
- FIG. 2 is a plan view of the current collector 1 used in the present embodiment.
- the current collector 1 includes a rectangular frame bone 11 having a relatively thick thickness, and an inner bone 12 having a lattice shape integrally arranged inside the frame bone 11 and having a relatively smaller thickness than the frame bone 11. It is made up of.
- the cross-sectional shapes of the frame bone 11 and the inner bone 12 are not particularly limited, but it is preferable to have a shape that has a large contact area with the paste-like active material and can be easily filled with the paste-like active material. . More specifically, the cross-sectional shape can be a rhombus or hexagon that is long in the thickness direction.
- the cross-sectional shapes and dimensions of the frame bone 11 and the inner bone 12 are not limited to the present embodiment, but the inner bone 12 is at least in the thickness direction not facing the filling machine 4 for the inner bone 12. It is preferable that the end surface is determined so as to be located on the inner side of the virtual surface including the end surface in the thickness direction that does not face the filling machine 4 of the frame bone 11.
- the current collector 1 As a manufacturing method of the current collector 1, there are a gravity casting method (GDC: GravityDie Casting), a continuous casting method, an expanding method, a punching method, and the like.
- the current collector 1 of the present embodiment is manufactured by a gravity casting method.
- the gravity casting method there is no theoretical limit to the thickness of the grid that can be cast.
- the raw material metal (alloy) of the current collector is melted, and the molten raw material metal (alloy) is poured by gravity into a mold that can withstand the temperature of the molten metal and cast. It is a method.
- the pasty active material used in this embodiment is filled and held in a current collector.
- the preparation of this pasty active material is not particularly limited. For example, knead lead powder containing lead monoxide, water, sulfuric acid, etc. (additives such as cut fiber, carbon powder, lignin, barium sulfate, lead tan are added depending on the characteristics of the positive electrode and negative electrode)
- the prepared paste-like active material can be used. Further, the filling amount of the paste-like active material into the current collector is not a problem as long as the inner bone is completely hidden, but it is desirable to fill up the thickness of the frame bone.
- a plurality of current collectors 1 are placed on the belt conveyor 2 and sequentially conveyed to the filling machine 4.
- a filling machine 4 equipped with a hopper 3 containing a pasty active material is filled with a pasty active material into a current collector 1 that passes under the filling machine 4 to obtain a filled electrode plate 5.
- the filling machine 4 discharges the pasty active material to the lower side with a pair of pushing rollers rotating from the upper side toward the inner side, and collects the current passing through the lower side.
- the body 1 is filled with a paste-like active material.
- the description is omitted.
- the filled electrode plate 5 in which the current collector 1 is filled with the pasty active material is conveyed to a pressing device 9 that performs a pressing process.
- the press device 9 of the present embodiment has one each of the first forming roller device 6, the second forming roller device 7, and the third forming roller device 8.
- the third forming roller device 8 is arranged at the end of the row of the first to third forming rollers 6 to 8 arranged in the transport direction. Even when there are a plurality of forming roller devices, the third forming roller device 8 is arranged at the end of the row.
- FIG. 3A is a diagram schematically showing the configuration of the first forming roller device 6.
- the first forming roller device 6 of the present embodiment has a pair of rollers composed of rollers 61 and 62, a pair of air cylinders 64 and 65, and a load control device 66.
- the roller 61 includes a shaft portion 61a and a roller body 61b attached around the shaft portion 61a.
- the roller 61 is a so-called upper roller that contacts the upper electrode plate surface, that is, the filling surface, of the electrode plate surfaces of the filling electrode plate 5.
- the roller 62 includes a shaft portion 62a and a roller body 62b attached around the shaft portion 62a.
- the roller 62 is a so-called lower roller that comes into contact with the electrode plate surface (lower electrode plate surface) of the filling electrode plate 5 on the side not facing the filling machine 4.
- the outer peripheral portions of the roller bodies 61b and 62b of the rollers 61 and 62 are made of a material having elasticity.
- Rubber can be used as the elastic material.
- Usable rubbers include SBR (styrene butadiene rubber), BR (butadiene rubber), IR (isoprene rubber), EPM (ethylene propylene rubber), EPDM (ethylene propylene diene rubber), NBR (nitrile rubber), chloroprene.
- Rubber IIR (Butyl rubber), Urethane rubber, Silicone rubber, Polysulfide rubber, Hydroxyl nitrile rubber, Fluorine rubber, Ethylene tetrafluoride / propylene rubber, Ethylene tetrafluoride / propylene / vinylidene fluoride rubber, Acrylic rubber, Chlorosulfone Polyethylene rubber, epichlorohydrin rubber, ethylene / acrylic rubber, liquid rubber, olefin-based thermoplastic elastomer, urethane-based thermoplastic elastomer, polyester-based thermoplastic elastomer, polyamide-based thermoplastic elastomer, PVC-based thermoplastic Sex elastomers, fluorine-based thermoplastic elastomer and the like.
- the hardness of the outer peripheral portion of the roller main body 61 b of the upper roller 61 is set lower than the hardness of the outer peripheral portion of the roller main body of the lower roller 62.
- the distance between the upper roller 61 and the lower roller 62 is not constant.
- the transport direction for transporting the filled electrode plate 5 and the direction orthogonal to the orthogonal direction orthogonal to the electrode plate surface are the width direction of the electrode plate.
- the distance between the upper roller 61 and the lower roller 62 is the first region portion of the electrode plate surface located on one side in the width direction [the electrode plate viewed on the paper surface of FIG. Direction from the left region of the surface] to the second region of the electrode plate located on the other side in the width direction [the region on the right side of the electrode plate as viewed in FIG. 3A]. Is gradually spreading.
- the air cylinder 64 pushes the end portion on the side where the first region portion of the shaft portion 61a of the upper roller 61 is located in a direction toward the filling electrode plate 5 in accordance with an output command from the load control device 66.
- the air cylinder 65 pushes the end of the shaft 61 a of the upper roller 61 on the side where the second region is located in the direction toward the filling electrode plate 5.
- the load control device 66 applies a load applied to the end of the shaft portion 61a on the side where the first region portion is located [left side of FIG. 3A] to the second region portion [right side of FIG. 3A].
- the output command for driving and controlling the air cylinders 64 and 65 is output so as to be larger than the load applied to the end portion of the shaft portion 61a on the side where the air cylinder is located.
- FIG. 3 (B) is a diagram schematically showing the configuration of the second forming roller device 7.
- the second forming roller device 7 of the present embodiment has a pair of rollers including rollers 71 and 72, a pair of air cylinders 74 and 75, and a load control device 76. is doing. Since the configuration of the second molding roller device 7 and the configuration of the first molding roller device are the same, the description thereof is omitted.
- the distance between the upper roller 71 and the lower roller 72 is the first region portion of the electrode plate surface located on one side in the width direction. From the left region portion as viewed on the paper surface of FIG.
- the load control device 76 of the second forming roller device 7 applies a load applied to the end portion of the shaft portion 71a on the side where the second region portion is located [the right side in FIG. 3B].
- FIG. 3C is a diagram schematically showing the configuration of the third forming roller device 8.
- the third forming roller device 8 has a pair of rollers including rollers 81 and 82, a pair of air cylinders 84 and 85, and a load control device 86. Since the third forming roller device 8 has the same configuration as the first forming roller device 6 and the second forming roller device 7, the description thereof is omitted. As shown in FIG. 3C, in the third forming roller device 8, the interval between the upper roller 81 and the lower roller 82 is constant. Further, the load control device 86 of the third forming roller device 8 outputs an output command for driving and controlling the air cylinders 84 and 85 so that the loads applied to both ends of the shaft portion 81a are equal.
- the load control device 66 of the first forming roller device 6 is configured such that the air cylinder 64 has the first region portion [the electrode plate surface in FIG.
- the load applied to the end portion of the shaft portion 61a located on the left side region portion] side is the maximum load, and the air cylinder 65 is in the second region portion [the right side region portion of the electrode plate surface in FIG. 3A] side.
- the load applied to the end portion of the shaft portion 61a located at is set to the minimum load (for example, zero).
- the air cylinder 74 is provided at the end of the shaft portion 71a located on the first region portion [region portion on the left side of the electrode plate surface in FIG.
- the load to be applied is set to the minimum load (for example, zero), and the load applied to the end of the shaft portion 71a by which the air cylinder 75 is located on the second region portion [region portion on the right side of the electrode plate surface in FIG. Maximum load.
- the load control device 86 of the third forming roller device 8 has an air cylinder 84 at the end portion of the shaft portion 81a located on the first region portion [region portion on the left side of the electrode plate surface in FIG.
- the maximum load in the present embodiment is a load when a pressure of 0.5 MPa is applied with the used air cylinder, and the minimum load zero is a pressure of 0 MPa with the used air cylinder. This is the state where the indentation is not applied (only the roller's own weight). When the load is controlled in this manner, the fluidity of the paste-like active material is maximized.
- the first pressing step is a step of pressing mainly (mainly) the first region portion of the electrode plate surface located on one side in the width direction of the electrode plate.
- the second pressing step is a step of mainly (mainly) pressing the second region portion opposite to the first region portion.
- the third pressing step is performed on the filled electrode plate by the third forming roller device 8.
- the third pressing step is a step of pressing over the entire first region portion and second region portion.
- the paste-like active material filled in the filled electrode plate 5 flows in the width direction from the region part that is preferentially pressed toward the region part that is not preferentially pressed. To do. And by the 3rd press process performed at the end of a press process, the filling amount of a paste-form active material becomes substantially equal over the whole width direction.
- the upper rollers 61, 71, and 81 have elasticity on the outer peripheral surfaces of the roller bodies 61b, 71b, and 81b, so that the upper electrode plate surface (filling surface) of the filling electrode plate 5 is elastic.
- the contact portion with the current collector 1 is deformed into a concave shape by the pressure when it is in contact with.
- the portions other than the contact portions of the roller main bodies 61b, 71b, and 81b project (enter) into the inner region partitioned (enclosed) by the frame bone 11 and the inner bone 12 of the current collector 1. Accordingly, the paste-like active material is pushed out from the filling surface to the opposite surface.
- the hardness of the roller bodies 61b, 71b and 81b of the upper rollers 61, 71 and 81 is made lower than the hardness of the roller bodies 62b, 72b and 82b of the lower rollers 62, 72 and 82.
- the outer peripheral part of the roller body of the upper roller is made softer than the outer peripheral part of the roller body of the lower roller. Therefore, a gap formed between the inner bone 12 and the outer peripheral portions of the roller bodies 62b, 72b, and 82b of the lower rollers 62, 72, and 82 becomes a roller body 61b of the inner bone 12 and the upper rollers 61, 71, and 81.
- the paste-form active material with which the filling surface was filled can be made to flow to the electrode plate lower surface on the opposite side to the filling surface. Therefore, the inner bone of the current collector 1 opposite to the filling surface can be sufficiently covered with the paste-like active material.
- the rubber used for the upper roller and the lower roller for example, rubber having an upper roller with a Shore hardness A: 40 and rubber with a lower roller having a Shore hardness A: 60 can be used.
- the thickness of the rubber is preferably uniform so that careless pressing is not applied when the filled electrode plate is pressed, and the thickness is preferably 40 mm or more. If it is this range, sufficient press-in of a paste-form active material and pressure transmission without loss can be performed.
- a plurality of the first to third forming roller devices may be arranged on the conveyance path if installation space is allowed, and the arrangement order is not limited. However, a third forming roller device is disposed at the end in the transport direction.
- FIG. 4 is a cross-sectional view taken along line A-A ′ of FIG.
- the thickness of the inner bones (12-1, 12-2) of the current collector 1 is made thinner than the thickness of the frame bone 11, and is arranged in the frame bone 11.
- the shape dimensions of the inner bones (12-1, 12-2) are determined so that the inner bones are located inside two virtual planes that include both end faces in the thickness direction of the frame bone 11, respectively.
- a gap may not necessarily be formed between the outer peripheral surfaces of the roller bodies 61b, 71b, and 81b of the upper rollers 61, 71, and 81 and the thick inner bone (12-1).
- Example 1 A lead alloy was prepared by adding 1.6% by mass of tin and 1.68% by mass of calcium to lead to make the entire mixture 100% by mass, and a current collector for a positive electrode plate was produced by a gravity casting method. .
- the current collector 1 is provided with a thick inner bone 12-1 and a fine inner bone 12-2 inside the frame bone 11.
- the outer dimensions of the frame bone 11 were 385 mm ⁇ 140 mm, the thickness was 5.8 mm, and the width was 4.4 mm.
- the cross-sectional shape of the thick inner bone 12-1 was a hexagon whose thickness was larger than the width, the thickness was 5.4 mm, and the width was 4.3 mm.
- the cross-sectional shape of the narrow inner bone 12-2 was also a hexagon whose thickness was larger than the width, the thickness was 3.6 mm, and the width was 2.8 mm.
- the filling surface side in the thickness direction of the large inner bone 12-1 and the thin inner bone 12-2 arranged in the state of being directed upward when filling the paste-like active material is the same virtual plane. Located on top. On the lower electrode plate surface opposite to the filling surface, the difference in the thickness direction between the frame bone 11 and the thick inner bone 12-1 is 0.2 mm.
- the above-described current collector was filled with a paste-like active material by the method and apparatus of the above-described embodiment described with reference to FIGS. 1 and 2 to produce a filled electrode plate. That is, the filled electrode plate 5 formed by passing the filling machine 4 and filling the current collector 1 with the pasty active material was conveyed to the pressing device 9 to perform the pressing process.
- rollers having a peripheral surface made of rubber were used for the upper rollers 61, 71, and 81 and the lower rollers 62, 72, and 82 of the first to third forming roller devices 6 to 8.
- the rubber material of the upper roller is neoprene rubber (Shore hardness A: 40) and its thickness is 40 mm.
- the rubber material of the lower roller is neoprene rubber (Shore hardness A: 60) and its thickness is 40 mm. .
- a pressure of 0.5 MPa was generated on the air cylinder 64 and 0 MPa on the air cylinder 65 of the first forming roller device 6.
- a pressure of 0 MPa was generated on the air cylinder 74 and 0.5 MPa on the air cylinder 75 of the second forming roller device 7.
- a pressure of 0.5 MPa was generated on each of the air cylinders 84 and 85 of the third forming roller device 8.
- the first forming roller device 6 causes the pasty active material of the filling electrode plate 5 to flow to the surface opposite to the filling surface, and at the same time, from the side of the air cylinder 64 having a large pressing force to the side of the air cylinder 65 having a small pressing force. It also flows toward.
- the roller main body 61b of the upper roller 61 bites into a space surrounded by the frame bone 11 except for the portion in contact with the frame bone 11 of the current collector due to the elasticity of rubber. Since the degree of biting is greater on the air cylinder 64 side than on the air cylinder 65 side, the paste-like active material flows.
- the degree of biting that the roller body 71 b of the roller 71 bites into the internal space of the frame bone 11 is air Since the cylinder 75 side is larger than the air cylinder 74 side, the paste-like active material flows in the direction opposite to that of the first molding roller device 6. And since the air cylinder 84 and the air cylinder 85 of the 3rd shaping
- Example 1 Comparative Example 1 In Example 1, the first forming roller device 6 and the second forming roller device 7 in the pressing process were omitted, and the filling electrode plate 5 was pressed using only the third forming roller device 8. Others were the same as in Example 1.
- Example 1 When the surface of the electrode plate manufactured in Example 1 and the electrode plate manufactured in Comparative Example 1 on the opposite side to the paste-like active material filling surface were confirmed, in Example 1, the thick inner bone 12-1 Both the inner bone 12-2 were securely embedded in the active material (see FIG. 4). On the other hand, in Comparative Example 1, it was confirmed that the fillability of the active material was insufficient and that the thick inner bone 12-1 was partially exposed on the surface opposite to the filling surface.
- FIG. 5 shows a state where the thick inner bone 12-1 is exposed. Even when the thickness of the frame bone is thick (5.8 mm) and the thickness of the thick inner bone is thick (5.4 mm), in the embodiment according to the present invention, the filling of the paste-like active material is opposite to the filling surface. It can be performed satisfactorily up to the surface.
- the packed paste-like active material is still soft, and the electrode plate surface is pressed by making a difference in the pressing pressure in the electrode plate width direction orthogonal to the electrode plate conveying direction.
- the paste active material can be flowed to produce an electrode plate in which the inner bone of the current collector on the lower surface side of the electrode plate is well covered with the paste active material.
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Abstract
Description
鉛に、スズ:1.6質量%、カルシウム:0.08質量%を添加して混合物全体を100質量%とした鉛合金を溶融し、重力鋳造方式によって正極板用の集電体を作製した。この集電体1は、図3、図4に示すように、枠骨11の内側に太内骨12-1と細内骨12-2とを設けた。枠骨11の外形寸法を385mm×140mm、厚さを5.8mm、幅を4.4mmとした。太内骨12-1の断面形状は、厚さが幅よりも大きい六角形とし、厚さを5.4mm、幅を4.3mmとした。また、細内骨12-2の断面形状も、厚さが幅よりも大きい六角形とし、その厚さを3.6mm、幅を2.8mmとした。図4に示したように、ペースト状活物質充填時に上方に向けた状態で配置される太内骨12-1及び細内骨12-2の厚さ方向の充填面側を、同一の仮想平面上に位置させた。充填面と反対側の下側極板面において、枠骨11と太内骨12-1の厚さ方向の差は、0.2mmとしている。
上記実施例1において、プレス工程の第1の成形ローラ装置6及び第2の成形ローラ装置7を省略した構成とし、第3の成形ローラ装置8のみを用いて充填極板5をプレスした。そのほかは、実施例1と同様とした。
2 ベルトコンベア
3 ホッパ
4 充填機
5 極板
6 第1の成形ローラ装置
7 第2の成形ローラ装置
8 第3の成形ローラ装置
9 プレス装置
11 枠骨
12 内骨
Claims (11)
- ペースト状活物質を収容したホッパを備えた充填機の下方を通過する集電体にペースト状活物質を充填して充填極板とする充填工程と、
前記充填極板の前記ペースト状活物質が軟らかい間に、前記充填極板を搬送しながら前記充填極板の極板面をプレスする工程とからなるペースト式鉛蓄電池用極板の製造方法であって、
前記充填極板の前記極板面をプレスする工程は、
前記充填極板を搬送する搬送方向及び前記極板面と直交する直交方向と直交する幅方向の一方の側に位置する前記極板面の第1の領域部分を重点的にプレスする第1のプレス工程と、
前記幅方向の他方の側に位置する前記極板面の第2の領域部分を重点的にプレスする第2のプレス工程と、
前記極板面の前記第1及び第2の領域部分を前記幅方向全体に亘ってプレスする第3のプレス工程とをそれぞれ少なくとも1回行い、かつ、
前記プレスする工程の最後には前記第3のプレス工程を行うことを特徴とするペースト式鉛蓄電池用極板の製造方法。 - 前記第1のプレス工程では、前記第1の領域部分のプレス荷重を前記第2の領域部分のプレス荷重よりも大きくし、
前記第2のプレス工程では、前記第2の領域部分のプレス荷重を前記第1の領域部分のプレス荷重よりも大きくし、
前記第3のプレス工程では、前記第1及び第2の領域部分のプレス荷重を等しくすることを特徴とする請求項1に記載のペースト式鉛蓄電池用極板の製造方法。 - 前記第1乃至第3のプレス工程は、それぞれ前記直交方向に前記充填極板を挟んで前記搬送方向に搬送するように配置された一対のローラを備えた第1乃至第3の成形ローラ装置により実施され、
前記第1の成形ローラ装置は、前記一対のローラ間の間隔が前記極板面の前記第1の領域部分から前記第2の領域部分に向かう方向に徐々に広がるように構成されており、
前記第2の成形ローラ装置は、前記一対のローラ間の間隔が前記極板面の前記第1の領域部分から前記第2の領域部分に向かう方向に徐々に狭くなるように構成されており、
前記第3の成形ローラ装置は、前記一対のローラ間の間隔が一定になるように構成されている請求項2に記載のペースト式鉛蓄電池用極板の製造方法。 - 集電体を載せて順次搬送するベルトコンベアと、
ペースト状活物質を収容したホッパを備えその下方を通過する前記集電体にペースト状活物質を充填する充填機と、
前記ベルトコンベアの搬送方向の後方に配置されて前記集電体に前記ペースト状活物質を充填してなる充填極板の極板面をプレスするプレス装置とを備え、
前記プレス装置は、
前記充填極板を搬送する搬送方向及び前記極板面と直交する直交方向と直交する幅方向の一方の側に位置する前記極板面の第1の領域部分を重点的にプレスする第1の成形ローラ装置と、
前記幅方向の他方の側に位置する前記極板面の第2の領域部分を重点的にプレスする第2の成形ローラ装置と、
前記極板面の前記第1及び第2の領域部分を前記幅方向全体に亘ってプレスする第3の成形ローラ装置とをそれぞれ少なくとも1台備え、前記搬送方向に配置された前記第1乃至第3の成形ローラからなる列の最後に前記第3の成形ローラ装置が配置されていることを特徴とするペースト式鉛蓄電池用極板の製造装置。 - 前記第1乃至第3の成形ローラ装置は、それぞれ前記直交方向に前記充填極板を挟んで前記搬送方向に搬送するように配置された一対のローラを備えており、
前記第1の成形ローラ装置は、前記一対のローラ間の間隔が前記極板面の前記第1の領域部分から前記第2の領域部分に向かう方向に徐々に広がるように構成されており、
前記第2の成形ローラ装置は、前記一対のローラ間の間隔が前記極板面の前記第1の領域部分から前記第2の領域部分に向かう方向に徐々に狭くなるように構成されており、
前記第3の成形ローラ装置は、前記一対のローラ間の間隔が一定になるように構成されている請求項4に記載のペースト式鉛蓄電池用極板の製造装置。 - 前記第1乃至第3の成形ローラ装置は、それぞれ前記一対のローラのうち、少なくとも前記充填極板の前記充填機と対向する側の極板面と接触する一方の前記ローラの外周部が弾力性を有する材料で構成されている請求項5に記載のペースト式鉛蓄電池用極板の製造装置。
- 前記第1乃至第3の成形ローラ装置は、前記一方のローラの回転軸の両端に前記充填極板に向かう方向の荷重をそれぞれ制御可能に加える荷重制御装置を備えており、
前記第1の成形ローラ装置では、前記第1の領域部分が位置する側の前記回転軸の端部に加える荷重が、前記第2の領域部分が位置する側の前記回転軸端部に加える荷重よりも大きくなるように前記荷重制御装置が荷重を制御し、
前記第2の成形ローラ装置では、前記第2の領域部分が位置する側の前記回転軸の端部に加える荷重が、前記第1の領域部分が位置する側の前記回転軸の端部に加える荷重よりも大きくなるように前記荷重制御装置が荷重を制御し、
前記第3の成形ローラ装置では、前記回転軸の両端に加える荷重が等しくなるように前記荷重制御装置が荷重を制御することを特徴とする請求項6に記載のペースト式鉛蓄電池用極板の製造装置。 - 前記第1乃至第2の成形ローラ装置の前記荷重制御装置は、前記回転軸の一方の前記端部に加える荷重が最大荷重となり、他方の前記端部に加える荷重が最小荷重になるように、荷重を制御し、
前記第3の成形ローラ装置の前記荷重制御装置は、前記回転軸の両方の前記端部に最大荷重を加えるように荷重を制御することを特徴とする請求項7に記載のペースト式鉛蓄電池用極板の製造装置。 - 前記一対のローラの他方の前記ローラの外周部も、弾力性を有する材料により構成されており、
前記一方のローラの外周部の硬度が、前記他方のローラの外周部の硬度よりも低いことを特徴とする請求項6に記載のペースト式鉛蓄電池用極板の製造装置。 - 前記一方のローラの外周部を構成する弾力性を有する材料の厚みは、40mm以上であることを特徴とする請求項6に記載のペースト式鉛蓄電池用極板の製造装置。
- 前記集電体は、枠骨と該枠骨と一体に形成されて該枠骨の内部空間を複数の小さい空間に仕切る内骨とを備えており、少なくとも前記内骨の前記充填機とは対向しない厚み方向の端面は、前記枠骨の前記充填機とは対向しない厚み方向の端面を含む仮想面よりも内側に位置している請求項4に記載のペースト式鉛蓄電池用極板の製造装置。
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CN105958014A (zh) * | 2016-07-11 | 2016-09-21 | 湖北海蓝装备科技有限公司 | 铅酸蓄电池极板处理转接机 |
Also Published As
Publication number | Publication date |
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KR101221778B1 (ko) | 2013-01-11 |
CN102301507A (zh) | 2011-12-28 |
JP2012142266A (ja) | 2012-07-26 |
CN103560230B (zh) | 2016-03-16 |
EP2518798A4 (en) | 2012-12-19 |
CN102301507B (zh) | 2013-10-23 |
JP5445564B2 (ja) | 2014-03-19 |
EP2518798B1 (en) | 2014-04-02 |
US8353089B2 (en) | 2013-01-15 |
CN103560230A (zh) | 2014-02-05 |
JP4876199B2 (ja) | 2012-02-15 |
ES2466823T3 (es) | 2014-06-11 |
JPWO2011093368A1 (ja) | 2013-06-06 |
KR20120083846A (ko) | 2012-07-26 |
EP2518798A1 (en) | 2012-10-31 |
US20120000070A1 (en) | 2012-01-05 |
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