WO2011099620A1 - 二次電池および二次電池製造装置 - Google Patents
二次電池および二次電池製造装置 Download PDFInfo
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- WO2011099620A1 WO2011099620A1 PCT/JP2011/053126 JP2011053126W WO2011099620A1 WO 2011099620 A1 WO2011099620 A1 WO 2011099620A1 JP 2011053126 W JP2011053126 W JP 2011053126W WO 2011099620 A1 WO2011099620 A1 WO 2011099620A1
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- Prior art keywords
- electrode plate
- negative electrode
- positive electrode
- plate
- lid
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- 238000004519 manufacturing process Methods 0.000 title claims description 37
- 230000005484 gravity Effects 0.000 claims abstract description 21
- 238000003475 lamination Methods 0.000 claims description 9
- 238000010030 laminating Methods 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims 1
- 230000032258 transport Effects 0.000 description 27
- 238000003860 storage Methods 0.000 description 15
- 230000007246 mechanism Effects 0.000 description 10
- 239000000725 suspension Substances 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000010062 adhesion mechanism Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
-
- 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
- H01M10/0404—Machines for assembling batteries
-
- 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
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
-
- 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
- H01M10/0468—Compression means for stacks of electrodes and separators
-
- 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
- H01M10/049—Processes for forming or storing electrodes in the battery container
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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
-
- 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
Definitions
- the present invention relates to a secondary battery configured by laminating a positive electrode plate and a negative electrode plate, and a secondary battery manufacturing apparatus for manufacturing the secondary battery.
- a stacked secondary battery has an electrode body having a structure in which positive and negative plates having tabs at the edge are alternately stacked, and the tabs of the positive and negative plates are connected to corresponding positive or negative terminals.
- the configuration is Here, since the positive electrode plate and the negative electrode plate need to be in a state of being insulated from each other while being in a laminated state, separators made of an insulating material are disposed between each other (for example, Patent Document 1). Further, as a separator, there is a separator that is formed in a bag shape and configured to wrap around the negative electrode plate to achieve insulation with the positive electrode plate (for example, see Patent Document 2).
- the charge / discharge performance may be lowered due to the reduction of the reaction area, Li deposition due to the nonuniform reaction may occur,
- the positive electrode plate and the negative electrode plate which should be adjacent to each other via the separator, come in contact with each other to cause a short circuit. Therefore, in the process of manufacturing the electrode body, it is necessary to laminate the positive electrode body and the negative electrode body with high accuracy. Generally, the positive electrode plate and the negative electrode plate are alternately laminated while positioning with a positioning pin or the like. Going to be done.
- the positive electrode plate and the negative electrode plate constituting the secondary battery as in Patent Documents 1 and 2 generally have different sizes.
- the electrode plate becomes large by the margin of the separator. Therefore, among the positive electrode plate and the negative electrode plate, one of the large-sized electrode plates can be accurately positioned by the pins, while the other small-sized electrode plate is obstructed by the already stacked one electrode plate.
- the positioning by the pin can not be performed, and the positional accuracy of the electrode plate has to be relied on the transport accuracy by the transport means. For this reason, the electrode body can not be configured with sufficient accuracy, or even if sufficient accuracy can be obtained, there has been a problem that it takes time to transport the electrode plate and the manufacturing cost is increased.
- the present invention has been made in view of the above-mentioned circumstances, and even if the sizes of the positive electrode plate and the negative electrode plate are different, the misalignment is prevented, and both electrode plates are accurately positioned and stacked.
- a secondary battery and an apparatus for manufacturing the secondary battery are provided.
- the secondary battery manufacturing apparatus of the present invention is provided with a lid fixing portion for fixing the above-mentioned shaft portion upward, and a first through hole, and a lid body on which the respective shaft portions of the positive electrode terminal and the negative electrode terminal are formed.
- a positive electrode plate including a positive electrode plate, the positive electrode plate carrying portion carrying the positive electrode plate disposed in line symmetry with the center line of gravity of the positive electrode plate to the lid fixing portion;
- a negative electrode plate including a positive plate arranging portion for inserting the first through hole of the plate into a shaft portion of the positive electrode terminal, and a tab provided with a second through hole, wherein the tab is a center of gravity of the negative plate
- a negative plate transport portion for transporting a negative plate disposed in line symmetry with respect to a line to the lid fixing portion, and the second through hole of the transported negative plate are inserted into the shaft portion of the negative terminal.
- a negative electrode plate arrangement portion for laminating the negative electrode plate on the positive electrode plate, and the negative electrode plate fixed by the lid fixing portion Wherein said stacked by erecting the body hanging positive electrode plate and the negative electrode plate and a standing means for positioning.
- the positive electrode plate and the negative electrode plate are suspended in a state in which the lid supports the tabs by being raised by the raising means.
- the tabs are provided in line symmetry with respect to the center of gravity line (the definition will be described later)
- the positive electrode plate and the negative electrode plate supported and suspended by the tabs have directions of their respective center of gravity lines. It is automatically positioned in order to match. Therefore, it is possible to manufacture a secondary battery in which both electrode plates are accurately positioned and stacked.
- the secondary battery of the present invention is provided with an electrode body in which a positive electrode plate and a negative electrode plate are alternately stacked via a separator, a case for housing the electrode body, a positive electrode terminal and a negative electrode terminal, And the positive electrode plate is disposed in line symmetry with respect to the substantially plate-like positive electrode main body and the center of gravity line of the positive electrode plate, and is connected to the positive electrode main body and the positive electrode terminal
- the negative electrode plate is provided with a first tab
- the negative plate is a plate-like negative electrode main body and a second plate disposed in line symmetry with respect to a barycentric line of the negative electrode plate and connected to the negative electrode body and the negative electrode terminal
- the first and second tabs are arranged so as not to overlap each other when stacked.
- the tabs are provided so as to be line symmetrical with respect to each barycentric line. For this reason, they are accurately positioned and stacked. Furthermore, for example, when the secondary battery is incorporated for driving a power motor of a movable body such as an electric car, and vibration occurs in the direction of the gravity center line swinging the lid surface up and down, the positive electrode main body and the tab of the positive electrode plate In the connecting portion, the rotational force is prevented from being applied to the positive electrode body portion, and the rotational force is prevented from being applied to the negative electrode body portion in the connecting portion between the negative electrode body portion and the tab of the negative electrode plate. For this reason, it is possible to prevent a failure such as breakage at these connection parts.
- the secondary battery manufacturing apparatus of the present invention even if secondary batteries having different sizes of the positive electrode plate and the negative electrode plate, it is possible to manufacture a secondary battery which is accurately positioned and stacked. According to the secondary battery of the present invention, it is possible to provide a secondary battery in which the positive electrode plate and the negative electrode plate are laminated with high accuracy.
- FIG. 2 is a cross-sectional view taken along the line AA of FIG.
- FIG. 2 is a cross-sectional view taken along line B-B in FIG.
- the secondary battery manufacturing apparatus of embodiment of this invention WHEREIN: It is sectional drawing which shows the detail of a guide member.
- the secondary battery manufacturing apparatus of embodiment of this invention WHEREIN: It is sectional drawing which shows the detail of a guide member attachment or detachment means.
- the secondary battery manufacturing apparatus of embodiment of this invention WHEREIN: It is sectional drawing which shows the detail of an accommodation means.
- it is explanatory drawing explaining lid conveyance operation.
- the manufacturing apparatus of the secondary battery of embodiment of this invention it is explanatory drawing explaining a guide member mounting operation.
- it is an explanatory view explaining lamination operation.
- the manufacturing apparatus of the secondary battery of embodiment of this invention WHEREIN: It is explanatory drawing explaining a suspending operation. In the manufacturing apparatus of the secondary battery of embodiment of this invention, it is explanatory drawing explaining lamination
- the manufacturing apparatus of the secondary battery of embodiment of this invention WHEREIN: It is explanatory drawing explaining the operation
- the secondary battery of embodiment of this invention WHEREIN: It is a front view which shows the other example of a positive electrode plate and a negative electrode plate.
- the secondary battery of embodiment of this invention WHEREIN It is a side view which shows the other example of a guide member.
- FIGS. 1 to 15. 1 to 6 show a secondary battery of this embodiment.
- an electrode body 103 in which a positive electrode plate 101 and a negative electrode plate 102 are alternately stacked and a case 104 for housing the electrode body 103.
- the case 104 is provided with a positive electrode terminal 105 and a negative electrode terminal 106 provided corresponding to the positive electrode plate 101 and the negative electrode plate 102 inside.
- the case 104 has a case main body 107 having an opening 107a in the Z direction orthogonal to the X direction which is the stacking direction of the electrode body 103, and a lid 108 closing the opening 107a of the case main body 107.
- the positive electrode terminal 105 and the negative electrode terminal 106 are attached to the lid 108 via the insulating sleeve 109.
- One end portions 105a and 106a of the positive electrode terminal 105 and the negative electrode terminal 106 protrude to the outside of the case 104, while the other end portions 105b and 106b protrude to the inside of the case 104, and respectively correspond to the positive electrode plate 101 or the corresponding negative electrode plate 102. It is connected.
- Each of the positive electrode plate 101 and the negative electrode plate 102 has substantially plate-shaped and rectangular main body portions 101a and 102a, and tabs 101b, 102b and 102c protruding from the edge of the main body portions 101a and 102a.
- the tabs 101b, 102b and 102c of the positive electrode plate 101 and the negative electrode plate 102 are orthogonal to the X direction, which is the stacking direction, and in a state of being accommodated inside the case 104, the terminal connection direction toward the positive electrode terminal 105 and the negative electrode terminal 106 It protrudes in the Z direction.
- the main body portion 102a of one negative electrode plate 102 is covered with a separator 110 formed of an insulating material, whereby the positive electrode plate 101 and the negative electrode plate 102 are separated by a separator
- the electrodes 110 are stacked in an insulated state to form an electrode body 103.
- a fixing tape 111 made of an insulating material is attached to the edge of the electrode body 103 at a plurality of places, and the positive electrode plate 101 and the negative electrode plate 102 stacked thereby are fixed so as not to be misaligned. .
- the fixing tape 111 is formed in the X direction at both ends of the electrode assembly 103 in which the electrode plates (positive electrode plate 101 and negative electrode plate 102) are sequentially stacked in the X direction orthogonal to the Y direction and Z direction. Are provided at two locations along the.
- the projecting positions of the tabs 101 b, 102 b and 102 c of the positive electrode plate 101 and the negative electrode plate 102 coincide with each other between the positive electrode plates 101 and the negative electrodes 102 as viewed in the X direction.
- the positive electrode plate 101 and the negative electrode plate 102 are set to be different from each other.
- through holes 101c, 102d and 102e are formed in the respective tabs 101b, 102b and 102c, and the positive electrode tab bundle 103a and the negative electrode tab bundles 103b and 103c are communicated with each other in a state of being configured.
- the tabs 101b, 102b and 102c of the positive electrode plate 101 and the negative electrode plate 102 are made substantially symmetrical with respect to center of gravity lines L101 and L102 of the main body portions 101a and 102a, respectively.
- One or two or more are arranged.
- one tab 101b is disposed in line symmetry with respect to a barycentric line L101 along the Z direction.
- two tabs 102b and 102c are disposed in line symmetry with respect to a barycentric line L102 along the Z direction.
- the center of gravity line means a line in the projecting direction (Z direction) of the tab passing through the center of gravity of the positive electrode plate or the negative electrode plate.
- one tab 101b of the positive electrode plate 101 is bundled as a connection tab, and comprises the positive electrode tab bundle 103a.
- a shaft portion 105c inserted into the through hole 101c and an enlarged diameter portion 105d expanded in a flange shape from the tip of the shaft portion 105c are formed.
- the positive electrode tab bundle 103a in which the shaft portion 105c is inserted into the hole 101c is sandwiched and fixed between the enlarged diameter portion 105d and the other end portion 105b.
- one tab 102b of the two tabs 102b and 102c of the negative electrode plate 102 is bundled as a connection tab to form a negative electrode tab bundle 103b.
- a shaft portion 106c inserted into the through hole 102d and an enlarged diameter portion 106d expanded in a flange shape from the tip of the shaft portion 106c are formed.
- the negative electrode tab bundle 103b in which the shaft portion 106c is inserted into the hole 102d is sandwiched and fixed between the enlarged diameter portion 106d and the other end portion 106b.
- a dummy terminal 112 is provided at a position corresponding to the other tab 102c of the two tabs 102b and 102c of the negative electrode plate 102 in the lid 108 of the case 104. There is.
- the dummy terminal 112 has only the other end 112 b corresponding to the other end 106 b of the negative electrode terminal 106, and does not have a configuration corresponding to the tip 106 a protruding outward of the case 104. ing.
- the shaft portion 112c and the enlarged diameter portion 112d are formed on the end face of the other end portion 112b of the dummy terminal 112.
- the other tab 102c of the two tabs 102b and 102c of the negative electrode plate 102 is bundled as a dummy tab to form a negative electrode tab bundle 103c, and the shaft portion 112c of the dummy terminal 112 is inserted through the through hole 102e. It is sandwiched and fixed between the end portion 112 b and the enlarged diameter portion 112 d.
- the diameter-increased portions 105d, 106d, and 112d of the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 respectively plastically deform a part of the corresponding shaft portions 105d, 106c, and 112c as will be described later in the manufacturing apparatus. It is formed by
- FIG. 7 shows a secondary battery manufacturing apparatus 1 of this embodiment.
- a working table 2 on which a positive electrode plate 101 and a negative electrode plate 102 are mounted, and a positive electrode plate 101 constituting an electrode body 103 on the working table 2.
- Electro plate transport means 3 for transporting the negative electrode plate 102
- lid transport means 4 for transporting the lid 108 to the work table 2
- raising means 5 for raising the electrode body 103 on the work table 2
- the laminated fixing means 6 for fixing the positive electrode plate 101 and the negative electrode plate 102 integrally, the tab fixing means 7 for fixing the tabs 101b, 102b and 102c to the terminals, and the electrode body 103 inside the case 104
- Accommodation means 8 for accommodating.
- the work table 2 has a table main body 21 and a mounting plate 22 disposed on the table main body 21 and on which the positive electrode plate 101 and the negative electrode plate 102 are mounted.
- the placement plate 22 is placed such that the Z direction in which the tabs 101b, 102b and 102c of the positive electrode plate 101 and the negative electrode plate 102 protrude is the P direction shown in FIG.
- the placement plate 22 is disposed on the lid fixing portion 22 a having a concave portion formed in a concave shape so that the lid 108 can be fitted, and on the P 2 side in the P direction from the lid fixing portion 22 a.
- an electrode plate placement portion 22b on which the negative electrode plate 102 is placed.
- the lid fixing portion 22a is formed with a recess having a width in the P direction substantially equal to the width (see FIG. 1) along the X direction of the lid 108 so that the lid 108 can be fitted.
- the longitudinal direction of the recess is in the Q direction orthogonal to the P direction.
- the recess has a width in the Y direction of the lid 108 so that the lid 108 can be fitted to the lid fixing portion 22 a in a state where the lid 108 is gripped by the lid conveyance means 4 (see FIG. 1). It is designed to have a larger length than).
- a groove 22c is formed along the Q direction orthogonal to the P direction.
- the grooves 22c are formed to penetrate to both side edges of the mounting plate 22, and in the present embodiment, two grooves 22c are arranged along the P direction.
- first rotation shaft 51 is provided along the Q direction at an edge of the mounting plate 22 on the P direction P2 side, and a rotation driving unit (not shown) for rotating the first rotation shaft 51 A first rotary drive) is provided. Then, the placement plate 22 can be pivoted around the first rotation shaft 51 on the table main body 21 so that the lid fixing portion 22a is on the upper side, so as to rise with the stacked electrode body 103. It is.
- the first rotation shaft 51 and the first rotation drive unit constitute a raising means 5 for raising the electrode body 103.
- the electrode plate transport means 3 has a positive plate transport portion 31 for transporting the positive plate 101 and a negative plate transport portion 32 for transporting the negative plate 102.
- the positive plate transport portion 31 and the negative plate transport portion 32 are Q It is provided on both sides across the work bench 2 in the direction.
- the positive plate transport unit 31 and the negative plate transport unit 32 are movable between the electrode plate receiving positions M 1 and M 2 for receiving the corresponding positive plate 101 or the corresponding negative plate 102 and the electrode plate arrangement portion 22 b of the work table 2.
- Electrode plate hand portions 31b and 32b provided at the ends of the plate conveyance arm portions 31a and 32a, and the electrode plate conveyance arm portions 31a and 32a and capable of attaching and detaching the positive electrode plate 101 or the negative electrode plate 102, and electrode plate conveyance arm portions 31a and 32a
- it has a positive electrode plate placement portion for adjusting the position of the electrode plate hand portions 31b and 32b in the R direction, which is the vertical direction, and electrode plate vertical position adjustment portions 31c and 32c which are negative electrode plate placement portions.
- the electrode plate hand units 31 b and 32 b are, for example, suction pads capable of sucking the positive electrode plate 101 or the negative electrode plate 102 by vacuum suction.
- the positive electrode plate 101 and the negative electrode plate 102 are sequentially conveyed by the electrode plate conveying belt conveyors 11 and 12, for example, to the corresponding electrode plate receiving positions M1 and M2.
- the positive electrode plate 101 and the negative electrode plate 102 are formed by punching a long electrode sheet before the above conveyance.
- the through holes are formed in the tabs integrally formed with the respective main body portions simultaneously with the punching.
- the main body, the tab and the through hole are simultaneously formed in the same mold.
- the positive electrode plate and the negative electrode plate were stacked and then the tabs were bundled, and then through holes were formed, so that burrs or the like could be mixed to cause battery failure.
- the through holes are formed simultaneously with the formation of the positive electrode plate 101 and the negative electrode plate 102 as described above, the generation of burrs can be prevented. Describing this reason in detail, burrs are likely to be generated when a large number of tabs are bundled and die-cut, but burrs are unlikely to occur in the first place when die-cutting is performed on only one tab to form a through hole It is from. Furthermore, since the through holes are formed in the same type for each of the positive electrode plate and the negative electrode plate, when focusing on one electrode plate, for example, each of the plurality of positive electrode plates (or multiple negative electrode plates) to be stacked The positions of the through holes in the tabs can be unified. That is, it is possible to prevent positional deviation of the through holes in each tab of the plurality of positive electrode plates, and as a result, it is possible to accurately perform alignment when laminating both electrode plates.
- Each of the electrode plate transport belt conveyors 11 and 12 transports the positive electrode plate 101 or the negative electrode plate 102 from the electrode plate receiving position M1 or M2 onto the work bench 2 by the corresponding positive electrode plate transport unit 31 or negative electrode plate transport unit 32, When placed, the corresponding positive electrode plate 101 or negative electrode plate 102 is transported to the electrode plate receiving positions M1, M2 such that the protruding direction of each tab 101b, 102b, 102c is on the P1 side in the P direction.
- the electrode plate transport arms 31a and 32a of the positive electrode plate transport unit 31 and the negative electrode plate transport unit 32 rotate approximately 90 degrees around their respective rotation axes, thereby making the electrodes It is movable from the plate receiving positions M1, M2 to the electrode plate placement portion 22a of the work table 2.
- the respective electrode plate conveyance belt conveyors 11 and 12 are separated from the work bench 2 along the Q direction in the direction away from the work bench 2 , 102c are conveyed, and the corresponding positive electrode plate 101 or negative electrode plate 102 is conveyed.
- the lid conveyance means 4 is provided adjacent to the work table 2 on the P1 side in the P direction from which the tabs 101b, 102b and 102c of the positive electrode plate 101 and the negative electrode plate 102 to be mounted protrude. .
- the lid conveyance means 4 is disposed between the lid receiving position N for receiving the lid 108 and the work bench 2 along the lid conveyance guide 41 and the lid conveyance guide 41 disposed along the P direction.
- the lid hand portion 43 has a base 43a disposed along the Q direction, and a pair of sandwiching pieces 43b slidable along the base 43a. Then, the lid 108 can be held by narrowing the separation distance between the pair of holding pieces 43b along the base 43a.
- the lid hand portion 43 may be a suction pad by vacuum suction, as in the case of the positive electrode plate 101 and the negative electrode plate 102 described above.
- the lid 108 is sequentially conveyed to the lid receiving position N by, for example, the lid belt conveyor 13. Moreover, the attitude
- Each of the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 of the lid 108 when transported to the lid receiving position N by the lid belt conveyor 13 is provided with enlarged diameter portions 105d, 106d, 112d.
- the shaft portions 105c, 106c, 112c project from the end faces of the other end portions 105b, 106b including the front end portions before becoming the diameter-increased portions 105d, 106d, 112d plastically. Then, from the tip end surfaces of these projecting shaft portions, tip small diameter portions 105e, 106e, 112e are formed which are smaller in diameter than the shaft portions 105c, 106c, 112c and become a part of the enlarged diameter portions 105d, 106d, 112d. ing.
- the layering and fixing means 6 includes a temporary fixing means 61 for temporarily fixing the electrode body 103 erected by the raising means 5 and a tape sticking means 62 for fixing the temporarily fixed electrode body 103 with the fixing tape 111. It is configured.
- the temporary fixing means 61 includes a holding plate 63 disposed next to the mounting plate 22 (P2 side in the P direction) on the table main body 21 of the work table 2 and an edge of the holding plate 63 in the P direction on the P1 side.
- a second rotation shaft 64 provided along the Q direction and capable of rotating the holding plate 63 on the table main body 21, and a rotation drive unit (not shown) for rotating the second rotation shaft 64 (second rotation drive Part).
- the holding plate 63 is provided at a position at which the electrode body 103 on the mounting plate 22 can be held between the holding plate 63 and the mounting plate 22 raised by the raising means 5 when rotated about the second rotation shaft 64. It is done. Further, on the holding plate 63, a groove 63a is similarly formed at a position facing the groove 22c formed in the placement plate 22. The groove 63a is also formed to penetrate to both edges along the Q direction.
- the tape attaching means 62 is provided on both sides in the Q direction across the work table 2 and the attaching mechanism 65 for attaching the fixing tape 111 to the electrode body 103 and the attaching mechanism 65 in the Q direction And an advancing and retracting mechanism 66 for advancing and retracting toward and away from the workbench 2.
- the advancing and retracting mechanism 66 has an advancing and retracting guide portion 66a disposed along the Q direction, and a sticking mechanism 65 at the tip, and has an advancing and retracting member 66b advanced and retracted along the Q direction by the advancing and retracting guide portion 66a.
- two bonding mechanisms 65 are provided in the upper and lower positions corresponding to the two grooves 22c and 63a of the mounting plate 22 and the holding plate 63, respectively.
- the adhesion mechanism 65 is set to a length corresponding to the thickness of the electrode body 103, and a base piece 65a disposed along the P direction, and a pair of projection pieces 65b projecting in the Q direction from both ends of the base piece 65a. , 65b, and is formed in a U-shape as a whole by the base piece 65a and the pair of protruding pieces 65b, 65b. Then, the adhesion mechanism 65 is advanced toward the work table 2 by the advancing and retracting mechanism 66 so that the groove 22 c of the placement plate 22 raised by the raising means 5 and the placement plate 22 are rotated to face each other. It is possible to insert the projection 65 b in each of the grooves 63 a of the holding plate 63.
- the projecting piece 65b is configured to be slidable along the base piece 65a. At the part forming the U-shape forming the sticking mechanism 65, it is for fixing so as to straddle the other projecting piece 65b from the one projecting piece 65b through the base piece 65a and so that the adhesive part faces inward.
- a tape 111 is provided. According to this configuration, after the projecting pieces 65b are inserted into the respective grooves 63a as described above, the pair of projecting pieces 65b are slid relative to each other to sandwich and press the electrode body 103, whereby the fixing tape is fixed to the electrode body 103. 111 can be stuck.
- the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 of the lid 108 fixed to the lid fixing portion 22a are located at positions corresponding to the lid fixing portion 22a formed on the mounting plate 22.
- guide member attaching / detaching means 9 for attaching / detaching a guide member 14 described later are respectively provided.
- the guide member 14 is formed in a conical shape in the present embodiment, and the enlarged diameter portions 105 d, 106 d and 112 d are not provided yet on the bottom surface 14 a serving as the base end.
- Recesses 14 b that can be fitted to the tip small diameter portions 105 e, 106 e and 112 e of the positive electrode terminal 105, the negative electrode terminal 106 and the dummy terminal 112 of the lid 108 are formed. Further, the diameter of the bottom surface 14a of the guide member 14 is set to be substantially equal to the diameter of each of the shaft portions 105d, 106c, 112c.
- the guide member attaching / detaching means 9 is specifically an inserted portion 91 into which the tip end portion 14c of the guide member 14 is inserted, and a guide provided and inserted in the inserted portion 91. And a chuck portion 92 capable of holding the tip portion 14 c of the member 14. Then, as shown in FIG. 7, the inserted portion 91 is fitted to the lid fixing portion 22 a of the mounting plate 22 in a state where the mounting plate 22 raised by the raising means 5 and the holding plate 63 are opposed to each other.
- the guide member 14 of each of the terminals is inserted into the corresponding inserted portion 91 so as to face the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 of the lid 108.
- the guide member 14 can be delivered to and from the chuck portion 92.
- the tab fixing means 7 is provided at the pressing plate 7a provided on the P1 side of the mounting plate 22 in the P direction, and at the edge of the mounting plate 22 on the P1 side in the P direction. It has a third rotation shaft 7b for rotating the pressure plate 7a with the direction as an axis and a rotation drive unit (a third rotation drive unit) (not shown) for rotating the third rotation shaft 7b. Then, as described later, after the positive electrode plate 101 and the negative electrode plate 102 are stacked on the mounting plate 22 and the guide member 14 is removed from the positive electrode terminal 105, the negative electrode terminal 106 and the dummy terminal 112, the third rotation shaft 7b is rotated.
- the pressure plate 7a is rotated to press the tip portions of the shaft portions 105d, 106c, 112c of the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 of the lid 108 fixed to the lid fixing portion 22a with the pressure plate 7a.
- caulking it is possible to form the enlarged diameter portions 105d, 106d, 112d.
- the housing means 8 moves along the housing guide portion 81 disposed along the P direction and the housing guide portion 81 from the work table 2 to the housing position S for housing the electrode body 103 in the case main body 107
- the case main body 107 is sequentially transported to the housing position S by, for example, the case main body belt conveyor 16. Further, the attitude of the case main body 107 when it is conveyed by the case main body belt conveyor 16 is set such that the opening 107 a faces upward.
- the accommodating hand portion 83 has a base portion 83 a disposed along the Q direction, and a pair of sandwiching pieces 83 b slidable along the base portion 43 a.
- the lid 108 can be held in the Q direction by narrowing the distance between the pair of holding pieces 83b from each other along the base 43a.
- a contact plate 83c rotatably supported at a position for holding the lid 108 is disposed.
- the preparation step the positive electrode plate 101 and the negative electrode plate 102 are prepared, and the lid 108 and the case main body 107 are prepared. Then, the prepared positive electrode plate 101 and negative electrode plate 102 are sequentially conveyed to the respective electrode plate receiving positions M1 and M2 by the corresponding electrode plate conveying belt conveyors 11 and 12, respectively. The prepared lids 108 are sequentially transported to the lid receiving position N by the lid belt conveyor 13. Furthermore, the prepared case body 107 is sequentially transported to the storage position S by the case body belt conveyor 16.
- the lid 108 transported to the lid receiving position N does not include the diameter-increased portions 105 d, 106 d, 112 d of the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112, and the lids 108 c, 106 c, 112 c
- the tip small diameter portions 105e, 106e, and 112e protrude from the end face.
- the lid 108 transported to the lid receiving position N by the lid transport means 4 is transported to the lid fixing portion 22 a of the mounting plate 22 of the work table 2. That is, the lid 108 is pinched by the pair of pinching pieces 43 b of the lid conveying means 4 at the lid receiving position N. Then, the held lid 108 is conveyed along the P direction to the upper side of the lid fixing portion 22 a on the placement plate 22 of the work table 2. Then, by lowering the lid 108 by the lid vertical adjustment section 44, the lid 108 is fitted and fixed to the lid fixing portion 22a so as to receive the inner surface 108a upward.
- the guide member 14 is attached to each of the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 of the lid 108 on the work bench 2.
- the guide member 14 is in a state in which the tip end portion 14 c is inserted into the inserted portion 91 of the guide member attaching / detaching means 9 provided on the holding plate 63 and held by the chuck portion 92.
- the mounting plate 22 is rotated about the first rotation shaft 51 of the raising means 5, and the holding plate 63 is rotated about the second rotation shaft 64 of the temporary fixing means 61, so that the setting plate 22 and the holding plate Make 63 face each other.
- the concave portion 14b of the bottom surface 14a of the guide member 14 inserted into the inserted portion 91 has the small diameter at the tip of each of the positive electrode terminal 105, the negative electrode terminal 106 and the dummy terminal 112 of the lid 108 fixed to the lid fixing portion 22a.
- the parts 105e, 106e and 112e are fitted.
- the nipped state of the guide member 14 by the chuck portion 92 of the guide member attaching / detaching means 9 is released.
- the holding plate 63 back from the upright state by rotating it around the second rotation shaft 64 the guide member 14 is inserted into the inserted portion 91 while being attached to the tip small diameter portions 105e, 106e, 112e. Leave the.
- the mounting plate 22 is also rotated about the first rotation shaft 51, and returned from the upright state.
- the positive electrode plates 101 and the negative electrode plates 102 are alternately laminated so that the tabs 101 b, 102 b, 102 c protrude in the same direction (P1 side in the P direction).
- the positive electrode plate conveyance portion 31 is driven.
- the positive electrode plate transport unit 31 holds the positive electrode plate 101 transported to the corresponding electrode plate receiving position M1 with the electrode plate hand portion 31b, and then rotates the electrode plate transport arm portion 31a, whereby the electrode plate of the work bench 2
- the positive electrode plate 101 is moved to the upper side of the placement portion 22 b.
- the positive electrode plate 101 has the through holes 101c of the tab 101b. It is arrange
- the positive electrode terminal 105 has a shape in which the guide member 14 is attached and the tip is sharpened, and the diameter is increased as it goes to the positive electrode terminal 105 side, thereby minimizing conveyance accuracy in the through hole 101c of the tab 101b.
- the negative electrode plate transport unit 32 is driven.
- the negative electrode plate transport unit 32 holds the negative electrode plate 102 transported to the corresponding electrode plate receiving position M1 with the electrode plate hand unit 32b, and then rotates the electrode plate transport arm unit 32a, whereby the electrode plate of the work bench 2
- the positive electrode plate 101 is moved to the upper side of the placement portion 22 b.
- the held negative electrode plate 102 is lowered to the electrode plate placement portion 22b by the electrode plate vertical position adjustment portion 32c (negative electrode plate placement portion), whereby the negative electrode plate 102 has the through holes 102d of the tab 102b.
- the through holes 102 e of the tab 102 c are inserted into the axial portion 112 c of the dummy terminal 112 and are disposed in the electrode plate disposition portion 22 b, respectively. Also at this time, the guide member 14 is attached to each of the negative electrode terminal 106 and the dummy terminal 112, so that the shaft portion of the negative electrode terminal 106 can be easily carried out with minimal conveyance accuracy to the through holes 102d and 102e of the tabs 102b and 102c. It is possible to accurately adjust the position while making it possible to insert the 106 c and 112 c.
- the positive electrode plate 101 and the negative electrode plate 102 are alternately stacked in a state where the corresponding positive electrode terminal 105, negative electrode terminal 106 or shaft portions 105 d, 106 c and 112 c of the dummy terminal 112 are inserted. Is configured.
- the positive electrode tab bundle 103 a and the negative electrode tab bundles 103 b and 103 c of the electrode body 103 are supported, and the positive electrode plate 101 and the negative electrode plate 102 are suspended. That is, the raising means 5 rotates the placement plate 22 around the first rotation shaft 51 to make it stand up. At this time, the shaft portions 105d, 106c, 112c of the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 are inserted into the through holes 101c, 102d, 102e of the tabs 101b, 102b, 102c of the positive electrode plate 101 and the negative electrode plate 102.
- the positive electrode tab bundle 103a and the negative electrode tab bundles 103b and 103c are suspended while being supported by the respective shaft portions 105d, 106c and 112c.
- the standing state of the mounting plate 22 by the standing means 5 may be substantially vertical, but it is slightly inclined to maintain the laminated state of the positive electrode plate 101 and the negative electrode plate 102. Is preferred.
- the tabs 101b, 102b and 102c are provided in line symmetry with respect to center of gravity lines L101 and L102 of the positive electrode plate 101 and the negative electrode plate 102.
- the positive electrode plate 101 and the negative electrode plate 102 supported and suspended by the positive electrode tab bundle 103a and the negative electrode tab bundles 103b and 103c have the directions of the center of gravity lines L101 and L102 coincide with each other by the action of gravity. Is positioned automatically. Since the positive electrode plate 101 and the negative electrode plate 102 are positioned and stacked so as to overlap substantially at the center position of each other if not only the directions of the center of gravity lines but also the positions coincide with or overlap with each other, It is more preferable from the viewpoint of reducing or preventing.
- the raising means 5 may have, for example, an oscillating unit such as a vibration motor.
- vibration can be given, and the positive electrode plate 101 and the negative electrode plate stacked together by the vibration. It is possible to more effectively perform positioning by reducing the frictional force that acts between it and 102, that is, it is possible to effectively prevent the misalignment.
- the positive electrode plate 101 and the negative electrode plate 102 are integrally fixed in a stacked state.
- the electrode body 103 is temporarily fixed by the temporary fixing means 61 in the layering fixing means 6. That is, by rotating the holding plate 63 around the second rotation shaft 64 to face the mounting plate 22, the electrode body 103 is held between the mounting plate 22 and the holding plate 63.
- the positive electrode plate 101 and the negative electrode plate 102 constituting the electrode body 103 are temporarily fixed so as not to be displaced from the stacked state after the positioning by the hanging.
- the fixing tape 111 is attached to the electrode body 103 by the tape attaching means 62 so that the electrode body 103 is integrated.
- the sticking mechanism 65 is advanced toward the work bench 2 by the advancing and retracting mechanism 66 of the tape sticking means 62, and the projection 65b Are inserted into the grooves 22 c and 63 a of the mounting plate 22 and the holding plate 63.
- the fixing tape 111 is attached to the U-shaped end of the electrode body 103 disposed between the projecting pieces 65b. It fixes so that it may become integral in the lamination
- the guide member 14 is removed from each of the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 of the lid 108. That is, in a state in which the electrode body 103 is held by the placement plate 22 and the holding plate 63, the tip end portion 14c of the guide member 14 is inserted into the inserted portion 91 of the guide member attaching / detaching means 9 (see FIG. 14). ). Then, the guide member 14 is held by the chuck portion 92 in this state. Next, when the holding plate 63 is rotated around the first rotation shaft 51 to be separated from the mounting plate 22, as shown in FIG.
- the guide member 14 held by the chuck portion 92 is attached
- the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 are separated and retracted together with the holding plate 63, and on the mounting plate 22 side, the positive electrode tab bundle 103a and the negative electrode tab bundle 103b, 103c to the shaft portion 105d. , 106c, 112c are in a state where they project.
- the guide member 14 retracted together with the holding plate 63 is used at the time of assembling another new secondary battery 100.
- the mounting plate 22 is rotated around the first rotation shaft 51 of the raising means 5, and the mounting plate 22 is returned to the state of being mounted on the table main body 21.
- the positive electrode tab bundle 103a and the negative electrode tab bundle 103b, 103c are fixed to the corresponding terminals. That is, the pressure plate 7 a of the tab fixing means 7 is rotated about the third rotation shaft 7 b so as to face the placement plate 22. As a result, the distal end sides of the shaft portions 105d, 106c, 112c protruding from the tabs 101b, 102b, 102c are pressed including the distal end small diameter portions 105e, 106e, 112e and plastically deformed, and the enlarged diameter portions 105d, 106d, 112d It is formed.
- each tab 101b, 102b, 102c has the enlarged diameter portion 105d, 106d, 112d and the other end 105c, 106c while the corresponding shaft portion 105d, 106c, 112c is inserted through the through hole 101c, 102d, 102e. , 112c, and is in a fixed state.
- the electrode body 103 is accommodated in the case main body 107. That is, as shown in FIG. 18, the pair of sandwiching pieces 83b of the accommodating hand portion 83 in the accommodating means 8 are inserted into the gaps formed on both sides in the Q direction of the lid 108 in the lid fixing portion 22a. The body 108 is pinched. Then, by moving the storage hand portion 83 upward by the storage vertical position adjustment portion 84, the lid 108 held by the storage hand portion 83 is separated from the lid fixing portion 22a, and the lid 108 is further moved. The electrode body 103 including the positive electrode terminal 105 and the negative electrode terminal 106 fixed to the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 is also separated.
- the lid 108 and the electrode body 103 are suspended by the storage means 8 in a state of being gripped by the storage hand portion 83, move along the P direction, and are transported to the storage position S. Then, at the housing position S, the electrode body 103 is inserted from the opening 107 a of the case main body 107 by being lowered from above the case main body 107 by the housing vertical position adjustment unit 84.
- the electrode body 103 is completely housed in the case main body 107, and the positive electrode tab bundle 103a
- the negative electrode tab bundles 103 b and 103 c are also folded and accommodated in the case body 107, and the lid 108 is disposed at the opening 107 a of the case body 107.
- the lid 108 is rotatable relative to the storage hand 83 by the contact plate 83c provided on the storage hand 83 of the storage means 8 as described above, the opening of the case main body 107
- the case body 107 is closed at the opening 107a while turning to close the case 107a.
- the positive electrode plate 101 and the negative electrode plate 102 have line symmetry with respect to the centroid lines L101 and L102 of the main body portions 101a and 102a. Even if the sizes of the positive electrode plate 101 and the negative electrode plate 102 are different by using the one provided with one or two or more tabs and carrying out the above-mentioned suspension by the raising means 5, the accuracy does not occur in the lamination
- the secondary battery 100 can be manufactured by laminating well and efficiently.
- the lid fixing portion 22 a is provided on the mounting plate 22 of the work table 2 on which the positive electrode plate 101 and the negative electrode plate 102 are stacked, so that the lid 108 transported by the lid transport means 4 is mounted on the work platform 2.
- the positive electrode plate 101 and the negative electrode plate 102 can be conveyed by the electrode plate conveying means 3, and the respective tabs 101 b, 102 b and 102 c can be fixed on the lid 108. Then, at the time of the hanging, the positive electrode plate 101 and the negative electrode plate 102 can be positioned with each other while being supported by the lid 108 by the raising means 5. Furthermore, the positive electrode plate 101 and the negative electrode plate 102 are conveyed by the electrode plate conveyance means 3, and the corresponding positive electrode terminal 105 or the negative electrode terminal 106 is inserted into the through holes 101c, 102d, 102e of the respective tabs 101b, 102b, 102c.
- the conical guide member 14 is fixed to the positive electrode terminal 105 and the negative electrode terminal 106, the through holes 101c, 102d, 102e of the tabs 101b, 102b, 102c can be easily carried out with minimum conveyance accuracy.
- the positive electrode terminal 105 or the negative electrode terminal 106 can be inserted.
- the guide member 14 does not interfere with the operation of the tab fixing means 7 thereafter by removing the guide member 14 by the guide member attaching / detaching means 9 .
- FIG. 20 shows another embodiment of the secondary battery.
- the case 201 in the secondary battery 200 of this embodiment, has a case main body 202 having an opening 202a on one side in the stacking direction X, and a lid 203 closing the opening 202a.
- the lid 203 has a larger surface than the positive electrode plate 101 and the negative electrode plate 102 housed in the case main body 202 because the lid 203 is configured to close the opening 202 a.
- the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 are provided in the lid 203.
- the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 which penetrate the lid 203 also project in the X direction.
- the positive electrode plates 101 and the negative electrode plates 102 are alternately stacked so that not only the tabs 101b, 102b, 102c but also the body portions 101a, 102a are placed on the lid 203. Can go. For this reason, the lid 203 and the electrode body 103 can be handled more easily as one.
- the electrode body 103 is accommodated in the case body 107, the suspended electrode body 103 does not need to be transported and inserted, and it is only necessary to cover the case body 202 from above the lid 202, which makes the operation easier. It becomes a thing.
- the tabs 101b, 102b, 102c can be disposed without being changed in direction without being folded. For this reason, there is no possibility that the tab 101b, 102b, 102c acts on the tab 101b, 102b, 102c in a state of being accommodated in the case 201 to cause tensile stress or compressive stress to cause breakage.
- the positive electrode plate 101 has one tab 101 b and the negative electrode plate 102 has two tabs 102 b and 102 c
- the present invention is not limited to this.
- the positive electrode plate 101 may have two tabs 101b and 101d, one of which may be a connection tab and the other may be a dummy tab.
- the number of tabs is not limited to two, and may be three or more.
- At least the positive electrode plate and the negative electrode plate have one or two or more tabs that are different in position when stacked, that is, do not overlap each other, and a line with respect to the barycentric lines L101 and L102 of these electrode plates. It may be arranged to be symmetrical.
- the directions of the center of gravity lines are made to coincide with each other by the action of gravity at the time of the hanging, and the positioning and the lamination are accurately performed.
- the positive electrode main portion is connected to the tab of the positive electrode main portion It is possible to prevent the rotational force from being applied to the negative electrode body portion and to prevent the rotational force from being applied to the negative electrode body portion at the connection portion between the negative electrode body portion and the tab of the negative electrode plate. As a result, failure of the secondary battery can also be prevented.
- the width of the tab is designed to be wider than the width of the tab of the other electrode plate. desirable. Since the strength can be increased by designing wide, the breakage can be prevented more effectively.
- the tabs are arranged in line symmetry with respect to the center of gravity line of the positive electrode plate or the negative electrode plate including the bag-like separator.
- the lid 108 is disposed on the work bench 2, and the through holes 101 c, 102 d and 102 e of the tabs 101 b, 102 b and 102 c of the positive electrode plate 101 and the negative electrode plate 102 are
- the negative electrode terminal 106 and the dummy terminal 112 are connected to each other, the present invention is not limited to this.
- the positive electrode terminal 105, the negative electrode terminal 106, and the dummy terminal 112 of the lid 108 may be connected to the positive electrode tab bundle 103a and the negative electrode tab bundles 103b and 103c, respectively.
- terminal connection may be performed.
- the guide member 14 is attached to each terminal before the lamination of the positive electrode plate 101 and the negative electrode plate 102 is performed, the present invention is not limited to this. For example, it is good also as what is already mounted
- the guide member 14 to be used shall be conical shape, the thing of various shapes is applicable. Furthermore, as in the case of the guide member 18 shown in FIG.
- the ridge line located on the upper side may be in a conical shape substantially parallel to the axis of the terminal at the time of the suspension.
- the layers can be easily stacked, and the positioning accuracy of the positive electrode plate 101 and the negative electrode plate 102 can be further improved.
- the secondary battery manufacturing apparatus of the present invention even if secondary batteries having different sizes of the positive electrode plate and the negative electrode plate, it is possible to manufacture a secondary battery which is accurately positioned and stacked. According to the secondary battery of the present invention, it is possible to prevent a failure such as breakage in the connection portion between the positive electrode main body and the tab of the positive electrode plate or the connection portion between the negative electrode main body and the tab of the negative electrode plate.
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Abstract
Description
本願は、2010年2月15日に日本出願された特願2010-030421に基づいて優先権を主張し、その内容をここに援用する。
本発明の二次電池製造装置は、正極端子および負極端子の軸部がそれぞれ形成された蓋体を、前記軸部を上方に向けて固定する蓋固定部と、第1の貫通孔の設けられたタブを備えた正極板であって前記タブは前記正極板の重心線に対して線対称に配置されている正極板を前記蓋固定部に搬送する正極板搬送部と、前記搬送された正極板の前記第1の貫通孔を前記正極端子の軸部へ挿入する正極板配置部と、第2の貫通孔が設けられたタブを備えた負極板であって前記タブは前記負極板の重心線に対して線対称に配置されている負極板を前記蓋固定部に搬送する負極板搬送部と、前記搬送された負極板の前記第2の貫通孔を前記負極端子の軸部へ挿入して前記正極板に前記負極板を積層する負極板配置部と、前記蓋固定部により固定された前記蓋体を起立させることで前記積層された前記正極板および前記負極板を吊り下げて位置決めする起立手段とを有する。
このため、両電極板を精度良く位置決めして積層された二次電池を製造することができる。
さらに、例えば電気自動車などの移動体の電力モータ駆動用として当該二次電池が組み込まれ、蓋の面を上下に揺する重心線方向の振動が生じた場合に、正極本体部と正極板のタブとの接続部分において正極本体部に回転力が加わることが防止され、また、負極本体部と負極板のタブとの接続部分において負極本体部に回転力が加わることが防止される。
このため、これら接続部分における破断等の故障を防止することができる。
本発明の二次電池によれば、正極板と負極板とが精度よく積層された二次電池を提供できる。
また、電極体103の縁端には、絶縁材からなる固定用テープ111が複数箇所貼着されており、これにより積層された正極板101及び負極板102が位置ずれしないように固定されている。本実施形態では、固定用テープ111は、Y方向及びZ方向に直交するX方向に電極板(正極板101、負極板102)が順次積層されてなる電極体103の両縁端に、X方向に沿って2箇所ずつ設けられている。
そして、ダミー端子112の他端部112bの端面には、正極端子105及び負極端子106同様に軸部112c及び拡径部112dが形成されている。負極板102の二つのタブ102b、102cの内の他方のタブ102cは、ダミータブとして、束ねられて負極タブ束103cを構成し、貫通孔102eにダミー端子112の軸部112cが挿通されて、他端部112bと拡径部112dとの間に挟み込まれて固定されている。なお、正極端子105、負極端子106及びダミー端子112のそれぞれにおける拡径部105d、106d、112dは、後述の製造装置でも説明するように対応する軸部105d、106c、112cの一部を塑性変形させることで形成されている。
図7は、この実施形態の二次電池製造装置1を示している。図7に示すように、この実施形態の二次電池製造装置1は、正極板101及び負極板102が載置される作業台2と、該作業台2に電極体103を構成する正極板101及び負極板102をそれぞれ搬送する電極板搬送手段3と、作業台2に蓋体108を搬送する蓋体搬送手段4と、作業台2上の電極体103を起立させる起立手段5と、積層された正極板101及び負極板102を一体となるように固定する積層固定手段6と、各タブ101b、102b、102cを各端子に固定するタブ固定手段7と、電極体103をケース104の内部に収容させる収容手段8とを備える。
そして、載置板22は、蓋体108を嵌合可能とするよう凹状に形成された凹部を備えた蓋固定部22aと、蓋固定部22aからP方向のP2側に配置され、正極板101及び負極板102が載置される電極板配置部22bとを有する。
蓋固定部22aには、蓋体108を嵌合可能なように、蓋体108のX方向に沿う幅(図1参照)と略等しいP方向の幅の凹部が形成されている。この凹部の長さ方向はP方向と直交するQ方向にある。蓋体搬送手段4によって蓋体108が把持された状態でこの蓋体108を蓋固定部22aに嵌合させることが可能なように、当該凹部は蓋体108のY方向の幅(図1参照)よりも大きな長さを持つよう設計されている。
また、電極板配置部22bには、P方向と直交するQ方向に沿って溝22cが形成されている。溝22cは、載置板22の両側縁まで貫通するように形成されており、本実施形態ではP方向に沿って二つ配列している。
なお、正極板101及び負極板102は、上記搬送前に長尺状の電極シートを打抜いて形成される。この際、それぞれの本体部と一体形成されるタブには、当該打抜と同時にそれぞれ上記貫通孔が形成される。具体的には、同一の型で本体部、タブおよび貫通孔が同時に形成される。
従来は正極板と負極板とを積層した後に各タブを束ね、その後、貫通孔を形成していたため、バリなどが混入し電池故障を引き起こす可能性があった。しかし、上述のように正極板101及び負極板102を形成時に同時に貫通孔を形成するのでバリの発生が防止できる。この理由を詳しく述べると、多数のタブを束ねて型抜きを行うとバリが発生しやすいが、1つのタブのみに型抜きをして貫通孔を形成する場合には、そもそもバリは発生し難いからである。
さらに、正極板と負極板のそれぞれにつき、各々同一の型で貫通孔を形成するので、一方の電極板に着目した際、例えば積層される複数の正極板(または複数の負極板)のそれぞれのタブにおける貫通孔の位置を統一できる。すなわち、複数の正極板のそれぞれのタブにおける貫通孔の位置ずれを防止でき、結果として両電極板の積層時に位置合わせを精度よく行うことができる。
より具体的には、本実施形態では、正極板搬送部31及び負極板搬送部32の各電極板搬送アーム部31a、32aは、それぞれの回転軸回りに概略90度回転移動することで、電極板受取位置M1、M2から作業台2の電極板配置部22a上まで移動可能となっている。このため、このような正極板搬送部31及び負極板搬送部32の構成では、各電極板搬送用ベルトコンベア11、12は、それぞれQ方向に沿って作業台2から離れる方向にタブ101b、102b、102cを突出させるようにして、対応する正極板101または負極板102を搬送する。
また、蓋体用ベルトコンベア13で蓋受取位置Nに搬送される際の蓋体108の正極端子105、負極端子106及びダミー端子112のそれぞれは、拡径部105d、106d、112dを備えておらず、塑性して拡径部105d、106d、112dとなる前の先端部分を含めて他端部105b、106bの端面から軸部105c、106c、112cが突出する。そして、突出したこれら軸部の先端面からは軸部105c、106c、112cよりも小径で塑性して拡径部105d、106d、112dの一部となる先端小径部105e、106e、112eが形成されている。
仮固定手段61は、作業台2の台本体21上で載置板22の隣(P方向のP2側)に配置された挟持板63と、該挟持板63のP方向のP1側の縁端にQ方向に沿って設けられ台本体21上で挟持板63を回動可能とする第二の回転軸64と、第二の回転軸64を回転駆動させる図示しない回転駆動部(第二回転駆動部)とを有する。挟持板63は、第二の回転軸64回りに回転した際に、起立手段5により起立した載置板22との間で載置板22上の電極体103を挟み込むことが可能な位置に設けられている。また、挟持板63上には、載置板22に形成される溝22cと対向する位置に同様に溝63aが形成されている。当該溝63aもQ方向に沿って両縁端まで貫通するように形成されている。
そして、進退機構66によって貼着機構65が作業台2に向かって進出することにより、起立手段5により起立した載置板22の溝22c、及び、載置板22に対向するように回動させた挟持板63の溝63aのそれぞれに突片65bを挿入させることが可能となっている。また、突片65bは、基片65aに沿ってスライド可能に構成されている。
貼着機構65を形成するU字内側となる部分には、一方の突片65bから基片65aを経て他方の突片65bへと跨るよう、かつ、内側に粘着部が向くようにして固定用テープ111が配されている。
この構成により、上述のように溝63aのそれぞれに突片65bが挿入された後、対の突片65bが互いにスライドされて電極体103を挟んで押圧することで、電極体103に固定用テープ111を貼着することができる。
ここで、図8に示すように、案内部材14は、本実施形態では円錐状に形成されており、基端となる底面14aには、まだ拡径部105d、106d、112dが設けられていない蓋体108の正極端子105、負極端子106及びダミー端子112のそれぞれの先端小径部105e、106e、112eに嵌合可能な凹部14bが形成されている。また、案内部材14の底面14aにおける径は、各軸部105d、106c、112cの径と略等しく設定されている。
そして、後述のように正極板101及び負極板102が載置板22に積層され且つ案内部材14が正極端子105、負極端子106及びダミー端子112から外された後に、第三の回転軸7b回りに加圧板7aを回転させることで、蓋固定部22aに固定された蓋体108の正極端子105、負極端子106及びダミー端子112の軸部105d、106c、112cの先端部分を加圧板7aにより押圧し、かしめて、拡径部105d、106d、112dを形成することが可能となっている。
ここで、ケース本体107は、収容位置Sに、例えばケース本体用ベルトコンベア16により順次搬送される。また、ケース本体107のケース本体用ベルトコンベア16により搬送される際の姿勢は、開口部107aが上方に向くように設定されている。
ここで、図10に示すように、収容用ハンド部83の一対の挟持片83bのそれぞれには、蓋体108を挟持する位置に回転可能に支持された当接板83cが配されている。このため、一対の挟持片83bで蓋体108を挟持する際には、当接板83cが蓋体108にそれぞれ当接することとなり、当接板83cの回転により挟持片83bに対する蓋体108の向きを変更することが可能となっている。
まず、準備工程として、上記正極板101及び負極板102を準備するとともに、蓋体108及びケース本体107を準備する。そして、準備された正極板101及び負極板102は、それぞれ対応する電極板搬送用ベルトコンベア11、12により各電極板受取位置M1、M2に順次搬送される。また、準備された蓋体108は、蓋体用ベルトコンベア13により蓋受取位置Nに順次搬送される。さらに、準備されたケース本体107は、ケース本体用ベルトコンベア16により収容位置Sに順次搬送される。
ここで、蓋受取位置Nに搬送される蓋体108は、正極端子105、負極端子106及びダミー端子112が拡径部105d、106d、112dを備えておらず、軸部105c、106c、112cの端面から先端小径部105e、106e、112eが突出した構成となっている。
そして、第二の回転軸64回りに回転させて挟持板63を起立した状態から元に戻すことで、案内部材14は、各先端小径部105e、106e、112eに装着されたまま被挿入部91から離脱する。そして、載置板22も第一の回転軸51回りに回転させて、起立した状態から元に戻す。
そして、この状態で、電極板上下位置調整部31c(正極板配置部)により、把持した正極板101を電極板配置部22bに降下させることにより、正極板101は、タブ101bの貫通孔101cが正極端子105の軸部105dに挿入されつつ電極板配置部22bに配置される。この際、正極端子105は案内部材14が装着されて先端が尖った形状であるとともに、正極端子105側にいくに従って拡径していくことで、タブ101bの貫通孔101cに最小限の搬送精度で容易に正極端子105の軸部105dを挿入可能としつつ、正確に位置調整することが可能となる。
負極板搬送部32は、対応する電極板受取位置M1に搬送される負極板102を電極板ハンド部32bで把持してから電極板搬送アーム部32aを回転させることで、作業台2の電極板配置部22b上方まで正極板101を移動させる。
そして、この状態で、電極板上下位置調整部32c(負極板配置部)により、把持した負極板102を電極板配置部22bに降下させることにより、負極板102は、タブ102bの貫通孔102dが負極端子106の軸部106cに、タブ102cの貫通孔102eがダミー端子112の軸部112cにそれぞれ挿入されつつ電極板配置部22bに配置される。
この際も、負極端子106及びダミー端子112のそれぞれに案内部材14が装着されていることで、タブ102b、102cの貫通孔102d、102eに最小限の搬送精度で容易に負極端子106の軸部106c、112cを挿入可能としつつ、正確に位置調整することが可能となる。
そして、正極板搬送部31及び負極板搬送部32による正極板101及び負極板102の搬送を交互に繰り返すことで、載置板22上には、それぞれ、タブ101b、102b、102cの貫通孔101c、102d、102eに、対応する正極端子105、負極端子106またはダミー端子112の軸部105d、106c、112cが挿通された状態で、正極板101と負極板102が交互に積層されて電極体13が構成される。
なお、起立手段5による載置板22の起立状態としては、ほぼ鉛直状態となるようにしても良いが、正極板101と負極板102との積層状態を維持させるために若干傾斜した状態であることが好ましい。ここで、正極板101及び負極板102のそれぞれにおいて、タブ101b、102b、102cは、正極板101及び負極板102の重心線L101、L102に対して線対称に設けられている。このため、正極タブ束103a及び負極タブ束103b、103cで支持されて吊下げられた正極板101及び負極板102のそれぞれは、重力の作用により、互いの重心線L101、L102の方向が一致するように自動的に位置決めされる。互いの重心線の方向のみならず位置も一致または重なるようにすれば、正極板101と負極板102とは互いのほぼ中心位置で重なるように位置決めされて積層されるので、積層ずれの影響を減少または防止する観点から、より好ましい。
この際、正極板101及び負極板102のタブは互いに重ならない位置に配置されているので、正極板101及び負極板102のタブが接触して短絡することが防止される。
ここで、起立手段5は、例えば振動モータなどの起振部を有するものとしても良い。このように起振部を備えることで、載置板22上で正極板101及び負極板102を位置決めする際に、振動を与えることができ、該振動によって互いに積層された正極板101と負極板102との間に作用する摩擦力を低減させて位置決めをより効果的に行う、すなわち積層ズレを効果的に防止することができる。
まず、図14に示すように、積層固定手段6において仮固定手段61によって電極体103の仮固定を行う。すなわち、第二の回転軸64回りに挟持板63を回転させて載置板22と対向させることで、載置板22と挟持板63との間で電極体103を挟み込む。これにより電極体103を構成する正極板101及び負極板102は、上記吊下げによる位置決め実施後における積層状態から変位しないように仮固定される。
次に、図15に示すように、テープ貼着手段62によって電極体103に固定用テープ111を貼着することで電極体103を一体にする。すなわち、電極体103が載置板22及び挟持板63に挟持された状態のまま、テープ貼着手段62の進退機構66により、貼着機構65を作業台2に向かって進出させて突片65bを載置板22及び挟持板63の各溝22c、63aに挿入させる。
この状態で一対の突片65b同士の幅を狭めることで、突片65bの間に配置された電極体103の縁端にU字上に固定用テープ111が貼着され、電極体103は、上記吊下げによる位置決め実施後における積層状態のままで一体となるように固定される。
そして、起立手段5の第一の回転軸51回りに載置板22を回転させて、載置板22を台本体21上に載置された状態に戻す。
また、正極板101及び負極板102を積層させる作業台2の載置板22に蓋固定部22aが設けられていることで、蓋体搬送手段4で搬送した蓋体108を作業台2上において蓋固定部22aに固定することができる。このため、電極板搬送手段3によって正極板101及び負極板102を搬送し、それぞれのタブ101b、102b、102cを蓋体108上に固定させることが可能となる。
そして、上記吊下げの際、起立手段5によって、正極板101及び負極板102を、蓋体108に支持された状態のまま互いに位置決めさせることができる。
さらに、電極板搬送手段3で正極板101及び負極板102を搬送して、それぞれのタブ101b、102b、102cの貫通孔101c、102d、102eに、対応する正極端子105または負極端子106を挿通させる際に、これら正極端子105及び負極端子106に錘状の案内部材14が固定されていることで、最小限の搬送精度で容易に、タブ101b、102b、102cの貫通孔101c、102d、102eに正極端子105または負極端子106を挿通させることができる。また、正極板101及び負極板102を積層した後は、案内部材着脱手段9により案内部材14を取り外すことで、その後のタブ固定手段7の動作において案内部材14が支障となってしまうこともない。
図20は、二次電池についての他の実施形態を示している。図20に示すように、この実施形態の二次電池200では、ケース201が、積層方向Xの一方側に開口部202aを有するケース本体202と、開口部202aを閉塞する蓋体203とを有する。蓋体203は、開口部202aを閉塞する構成であることから、ケース本体202に収容される正極板101及び負極板102よりも大きな面を有する。そして、本実施形態でも、蓋体203に、正極端子105、負極端子106及びダミー端子112が設けられている。ここでは、蓋体203を貫通する正極端子105、負極端子106及びダミー端子112もX方向に突出する。
また、ケース本体107へ電極体103を収容工程する際、吊下げた電極体103を搬送・挿入する必要はなく、蓋体202の上方からケース本体202を被せるだけで良いので、作業がより容易なものとなる。
さらに、蓋体203でケース本体202の開口部202aを閉塞した後も、タブ101b、102b、102cは、折り畳まれることなく、向きを変えずに配設させることができる。このため、ケース201に収容された状態で、タブ101b、102b、102cに曲げが作用して引張応力や圧縮応力が生じて破損してしまうおそれもない。
さらには、タブは二つに限られず、三つ以上としても良い。少なくとも、正極板、負極板は、積層された際に互いに位置が異なる、すなわち互いに重ならない一または二以上のタブを有しており、これら各電極板の各重心線L101、L102に対して線対称となるように配置されていればよい。
この構成により、上記吊下げ時に重力の作用により互いの重心線の方向を一致させるようにして精度よく位置決めして積層される。
さらに、例えば電気自動車などの移動体の電力モータ駆動用として当該二次電池が組み込まれ、重心線方向の振動が生じた場合に、正極本体部と正極板のタブとの接続部分において正極本体部に回転力が加わることが防止され、また、負極本体部と負極板のタブとの接続部分において負極本体部に回転力が加わることが防止されるので、これら接続部分における破断等が防止され、結果として二次電池の故障を防止することもできる。
正極板または負極板の一方の電極板のタブが図4の正極板のように1つしか設けられない場合には、当該タブの幅は他方の電極板のタブの幅より広く設計するのが望ましい。幅広に設計することで強度を上げることができるので、上記破断をより効果的に防止することができる。
正極板または負極板が袋状セパレータで包まれている場合には、この袋状セパレータを含む正極板または負極板の重心線に対して線対称となるように上記タブが配置される。
例えば、正極板101と負極板102とを積層した後に別の支持部材によって各タブ101b、102b、102cを支持して吊下げ、この吊下げにより位置決めされた電極体103の積層状態を固定した後に、正極タブ束103a及び負極タブ束103b、103cに、蓋体108の正極端子105、負極端子106及びダミー端子112のそれぞれを接続するようにしても良い。
案内部材14は、正極板101と負極板102との積層を実施する前に、案内部材14を各端子に装着させるものとしたが、これに限るものではない。例えば、蓋受取位置で受け取る蓋体に既に装着されているものとしても良い。この場合には、案内部材14を着脱するための案内部材着脱手段9を備える必要はなく、少なくとも案内部材14を除去可能な案内部材除去手段を備えていれば良い。また、使用する案内部材14は、円錐状であるものとしたが、様々な形状のものが適用可能である。
さらに、図22に示す案内部材18のように、上記吊下げの際、上側に位置する稜線が、端子の軸線に略平行となるような円錐形状としても良い。この場合には、容易に積層を行うことが可能であるとともに、上記吊下げを実施時の正極板101及び負極板102の位置決め精度をさらに向上させることができる。
本発明の二次電池によれば、正極本体部と正極板のタブとの接続部分又は負極本体部と負極板のタブとの接続部分における破断等の故障を防止することができる。
2 作業台
22a 蓋体固定部
3 電極板搬送手段
4 蓋体搬送手段
5 起立手段
6 積層固定手段
8 収容手段
9 案内部材着脱手段(案内部材除去手段)
14 案内部材
31c 電極板上下位置調整部(正極板配置部)
32c 電極板上下位置調整部(負極板配置部)
100 二次電池
101 正極板
101a 本体部
101b、101d タブ
101c 貫通孔
102 負極板
102a 本体部
102b、102c タブ
102d、102e 貫通孔
103 電極体
104 ケース
105 正極端子
106 負極端子
107 ケース本体
107a 開口部
108 蓋体
Claims (4)
- 正極板と負極板とがセパレータを介して交互に積層された電極体と、
前記電極体を収容するケースと、
正極端子及び負極端子が設けられ、前記ケースに嵌合する蓋とを有し、
前記正極板は、略板状の正極本体部と、前記正極板の重心線に対して線対称に配置され前記正極本体部および前記正極端子に接続された第1のタブとを備え、
前記負極板は、略板状の負極本体部と、前記負極板の重心線に対して線対称に配置され前記負極本体部および前記負極端子に接続された第2のタブとを備え、
前記第1および第2のタブは前記積層された際に互いに重ならない位置に配置されている二次電池。 - 前記蓋に設けられたダミー端子をさらに有し、
前記第2のタブは接続用タブとダミータブとを備え、
前記接続用タブが前記負極端子に接続されるとともに前記ダミータブが前記ダミー端子に接続されている請求項1記載の二次電池。 - 正極端子および負極端子の軸部がそれぞれ形成された蓋体を、前記軸部を上方に向けて固定する蓋固定部と、
第1の貫通孔の設けられたタブを備えた正極板であって前記タブは前記正極板の重心線に対して線対称に配置されている正極板を前記蓋固定部に搬送する正極板搬送部と、
前記搬送された正極板の前記第1の貫通孔を前記正極端子の軸部へ挿入する正極板配置部と、
第2の貫通孔が設けられたタブを備えた負極板であって前記タブは前記負極板の重心線に対して線対称に配置されている負極板を前記蓋固定部に搬送する負極板搬送部と、
前記搬送された負極板の前記第2の貫通孔を前記負極端子の軸部へ挿入して前記正極板に前記負極板を積層する負極板配置部と、
前記蓋固定部により固定された前記蓋体を起立させることで前記積層された前記正極板および前記負極板を吊り下げて位置決めする起立手段と
を有する二次電池製造装置。 - 前記位置決めされた前記正極板と前記負極板とを互いにテープで固定する積層固定手段と、
前記テープで固定された前記正極板と前記負極板とを前記蓋体と嵌合するケースに収容する収容手段と
をさらに有する請求項3に記載の二次電池製造装置。
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US13/391,550 US20120148913A1 (en) | 2010-02-15 | 2011-02-15 | Secondary battery and secondary battery manufacturing apparatus |
EP11742359A EP2538483A1 (en) | 2010-02-15 | 2011-02-15 | Secondary cell and secondary cell production device |
CN2011900001466U CN203085688U (zh) | 2010-02-15 | 2011-02-15 | 二次电池及二次电池制造装置 |
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EP (1) | EP2538483A1 (ja) |
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EP2538483A1 (en) | 2012-12-26 |
TW201205917A (en) | 2012-02-01 |
KR20120046292A (ko) | 2012-05-09 |
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CN203085688U (zh) | 2013-07-24 |
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