JP6575370B2 - Electrode laminator - Google Patents

Description

  The present invention relates to an electrode stacking apparatus.

  As an electrode stacking apparatus for manufacturing an electrode stack, for example, an apparatus described in Patent Document 1 is known. The electrode stacking apparatus described in Patent Document 1 is provided with a supply mechanism that supplies a sheet-like electrode, and an electrode supplied from the supply mechanism at a predetermined position by using gravity. A drop moving mechanism for dropping and a guide stacking mechanism arranged below the drop moving mechanism and sequentially laminating the electrodes discharged from the discharge unit of the drop moving mechanism to a predetermined position. The guide stacking mechanism includes a bottom wall on which the stacked body is placed, and a standing wall that protrudes perpendicularly to the bottom wall and stops the movement of the electrode discharged from the discharge portion of the drop moving mechanism, have. The downstream side of the guide stacking mechanism in the electrode movement direction is lower than the upstream side in order to easily adjust the position of the stacked electrodes.

  Although omitted in Patent Document 1, the electrode is provided with a connection portion for electrical connection to the outside. In the case of an electrode used in a stacked power storage device, a part of the metal foil is protruded from a part of the outer periphery of the electrode body in which the active material layer is formed on both surfaces of the substantially rectangular metal foil. In many cases, a tab portion is formed from a part of the protruding metal foil, and the tab portion is used as a connection portion. Patent Documents 2 and 3 disclose a lamination method in the case where an electrode having a tab portion is used. In the laminating method described in Patent Document 2, the positive electrode and the negative electrode supplied from opposite directions are stacked on the mounting means. Moreover, in the lamination | stacking method described in patent document 3, it is described that the positive electrode and negative electrode which were alternately mounted on the conveyor are dropped and laminated | stacked at the terminal end of the said conveyor. In Patent Documents 2 and 3, the positive electrode and the negative electrode are aligned and transported so that the protruding direction of the tab portion is orthogonal to the supply direction of the positive electrode and the negative electrode.

  In addition, so-called multi-striping is known as an efficient manufacturing method for an electrode provided with a tab portion. As an example, Patent Document 4 discloses a 2-strip manufacturing method. In the manufacturing method disclosed in Patent Document 4, a tab portion facing the center is formed in the short direction of the belt-shaped plate portion. By the way, when forming an active material layer by coating, continuous coating tends to stabilize quality, such as a film thickness of a coating film, rather than intermittent coating. For this reason, in Patent Document 4, an active material layer is formed by continuous coating when two strips are taken, while an uncoated portion in which no active material layer is formed at the end or center in the short direction of the strip electrode material Form. And the tab part is formed from a part of this uncoated part.

JP 2012-91372 A JP 2012-129098 A JP-A-3-138868 JP-A-2-174058

  By the way, in a pair of electrodes formed by, for example, two strips, the tab portions protrude in directions opposite to each other. When this is laminated by a single laminating apparatus, it is necessary to reverse the direction of one electrode and align the direction of the electrode. However, since changing the direction of the electrode involves contact with a conveyor or the like, some of the active material particles may be peeled off from the active material layer and fall (powders).

  An object of the present invention is to provide an electrode stacking apparatus that can efficiently manufacture a stacked body without aligning the direction of a pair of electrodes formed by double striping or the like.

  An electrode laminating apparatus according to one embodiment of the present invention is an electrode laminating apparatus for manufacturing a laminate by laminating a sheet-like electrode having a main body provided with an active material and a tab protruding from the main body. An electrode supply mechanism that supplies a pair of electrodes arranged so as to protrude in opposite directions, a main surface on which the electrodes are stacked, and a first surface of the main surface that is erected and supplied A first stacking table and a second stacking table each having a positioning wall for positioning the electrodes, a transport mechanism for transporting the first stacking table and the second stacking table, and a first rotating unit that rotates clockwise in plan view. And a first rotating base that is attached to the first rotating part and has a first receiving part that receives the first stacking base from the transport mechanism, a second rotating part that rotates counterclockwise in plan view, and a second Attached to the rotating part, the second stack from the transport mechanism And a second turntable having a second receiving portion for receiving the first stacking table and the second stacking table in the transport mechanism so that the direction of the positioning wall relative to the main surface is the same. The electrode supply mechanism is configured such that one of the pair of electrodes falls on the first stacking table held by the first receiving unit, and the other of the pair of electrodes falls on the second stacking table held by the second receiving unit. A pair of electrodes is supplied as described above.

  According to such an electrode stacking apparatus, the first stacking table and the second stacking table are arranged in the transport mechanism so that the direction in which the positioning wall is positioned with respect to the main surface is the same, for example, the first stacking table. And the positioning wall of the 2nd lamination stand is located in the downstream of the conveyance direction in a conveyance mechanism. The first stacking table transferred by the transfer mechanism is received and held by the first receiving unit of the first turntable, and the second stacking table transferred by the transfer mechanism is received by the second receiving of the second turntable. Received and held by the department. Here, the first rotating unit and the second rotating unit rotate in opposite directions. For this reason, the direction in which the positioning wall is positioned with respect to the main surface of the first stacking table when the first rotating unit rotates 90 ° after the first receiving unit receives the first stacking table, and the second stacking table The direction in which the positioning wall is positioned with respect to the main surface of the second stacking table when the second rotating unit rotates 90 ° after the second receiving unit receives the position is opposite to each other. Accordingly, even when the electrode supply mechanism supplies a pair of electrodes in which the tabs protrude in opposite directions, one of the pair of electrodes is moved to the first without aligning the directions of the tabs. While being able to drop and laminate | stack on the 1st lamination | stacking stand currently hold | maintained by the receiving part, the other of a pair of electrodes can be dropped and laminated | stacked on the 2nd lamination | stacking stand currently hold | maintained by the 2nd receiving part. Therefore, according to the above electrode stacking apparatus, it is possible to efficiently manufacture a stacked body without aligning the direction of a pair of electrodes formed by double striping or the like.

  The first receiving unit includes a first holding unit that holds the first stacking base, and a first lifting mechanism that can move the first holding unit up and down in a vertical direction. A second holding unit that holds the stacking base; and a second lifting mechanism that can move the second holding unit up and down in a vertical direction. The first lifting mechanism changes a position of the first holding unit in the vertical direction. In addition, the inclination angle of the first holding part may be adjusted, and the second lifting mechanism may change the position of the second holding part in the vertical direction and adjust the inclination angle of the second holding part. In this case, by controlling the first lifting mechanism, it is possible to prevent the first holding unit or the first stacking table held by the first holding unit from coming into contact with the transport mechanism or the like. Similarly, by controlling the second lifting mechanism, it is possible to prevent the second holding unit or the second stacking table held by the second holding unit from coming into contact with the transport mechanism or the like.

  Each of the first elevating mechanism and the second elevating mechanism may include a first elevating unit and a second elevating unit that are separated from each other and controlled independently of each other. In this case, the inclination angles of the first holding part and the second holding part can be adjusted with a simple configuration.

  Each of the first elevating part and the second elevating part has a cylinder part that can be expanded and contracted in the vertical direction and a tip part that is attached to the tip of the cylinder part, and is included in the first lifting mechanism. The front end of the second elevating unit included in the first elevating mechanism may be in contact with the first holding unit. In this case, since the position shift of the 1st holding | maintenance part with respect to a 1st raising / lowering part can be prevented, the position shift of the 1st lamination | stacking stand hold | maintained at the said 1st holding | maintenance part is suppressed.

  The first elevating mechanism adjusts the position of the first stacking table in the vertical direction according to the number of electrodes stacked on the first stacking table, and the second lifting mechanism is stacked on the second stacking table. The position in the vertical direction of the second stacking table may be adjusted according to the number of electrodes being provided. In this case, even if the stacking height of the stacked body increases, the falling electrode is prevented from landing near the upper end of the uppermost electrode of the stacked body. Therefore, it is possible to suppress the occurrence of problems associated with an increase in the stacked height of the electrodes.

  Further, the first elevating mechanism may incline the first holding portion so that the first side of the first stacking base is positioned below the side facing the first side. In this case, the electrode dropped toward the first stacking table slides on the inclined main surface and comes into contact with the positioning wall. Thereby, the position of the lower end part of the electrode in a 1st lamination | stacking stand can be arrange | equalized.

  Further, the first stacking base may have a recess that engages with the first holding unit, and the first holding unit may have a protrusion that fits into the recess. In this case, the first stacking table is stably held by the first holding unit.

  The transport mechanism includes a first transport unit that transports the empty first stacking table and the second stacking table, a first stacking unit that is provided above the first transport unit, and that houses the stack, and a second stacking unit. A second transport unit that transports the stacking table, the first transport unit and the second transport unit extend along one direction and overlap each other in plan view, and the first receiving unit is , Receiving an empty first stacking table from the first transport unit, and placing the first stacking table containing the stacked body on the second transport unit, wherein the second receiving unit is empty from the first transport unit While receiving a 2nd lamination | stacking stand, you may mount the 2nd lamination | stacking stand in which the laminated body was accommodated in a 2nd conveyance part. In this case, the first stacking table is received by the first receiving unit from the first transport unit, and can be placed on the second transport unit after the first rotating unit has rotated 360 °. Similarly, the second stacking table is received by the second receiving unit from the first transport unit, and can be placed on the second transport unit after the second rotating unit has rotated 360 °. Here, as described above, the first stacking table and the second stacking table are arranged in the transport mechanism so that the first stacking table and the second stacking table have the same direction of the positioning wall with respect to the main surface. Then transported. For this reason, the direction in which the positioning wall is positioned with respect to the main surfaces of the first stacking table and the second stacking table placed on the second transport unit is the same as that when the positioning wall is disposed on the first transport unit. Therefore, a mechanism for aligning the directions of the first stacking table and the second stacking table in which the stack is accommodated can be omitted.

  The first turntable may include a plurality of first receiving units, and the second turntable may include a plurality of second receiving units. In this case, since each of the first turntable and the second turntable can hold a plurality of stacking tables, the stacked body can be manufactured more efficiently.

  The electrode stacking device includes a first inspection device for inspecting a state of the stacked body in the first stacking table held by the first receiving unit, and a second stacking held by the second receiving unit. You may further provide the 2nd inspection apparatus which test | inspects the state of the laminated body in a stand. In this case, it is possible to quickly inspect the misalignment or the like of the stacked body accommodated in the first stacking base and the stacked body accommodated in the second stacking base.

  The electrode supply mechanism may include a first electrode supply unit that supplies a pair of positive electrodes that are a pair of electrodes, and a second electrode supply unit that supplies a pair of negative electrodes that are a pair of electrodes. In this case, since the positive electrode and the negative electrode are supplied to the corresponding stacking table by separate supply units, the supply of the positive electrode is more than the case where both the positive electrode and the negative electrode are supplied to the corresponding stacking table using one supply unit. The interval between the timing and the supply timing of the negative electrode can be shortened, and the stacking speed of the electrodes can be improved.

  An electrode laminating apparatus according to another aspect of the present invention is an electrode laminating apparatus for manufacturing a laminated body by laminating a main body portion provided with an active material and a sheet-like electrode having tabs protruding from the main body portion. An electrode supply unit that has a pair of conveyors extending in parallel and supplies a pair of electrodes arranged so that tabs protrude in opposite directions to each other by the pair of conveyors, and a linear conveyance path Forming and supporting the first stacking table in conjunction with the transport mechanism in which the first stacking table and the second stacking table are placed in the same direction, the first rotating shaft arranged in the vertical direction, and the first rotating shaft And a first turntable for moving the first stacking table supported by the first receiving unit between the supply position of one electrode by the one conveyor and the transport mechanism, and arranged in the vertical direction Second rotation axis and second time It has a second receiving part that interlocks with the shaft and supports the second stacking table, and moves the second stacking table supported by the second receiving unit between the supply position of the other electrode by the other conveyor and the transport mechanism. A first rotating shaft that rotates in the first direction after receiving the first stacking table from the transport mechanism, and the second rotating shaft receives the second stacking table from the transport mechanism. After that, it rotates in the second direction opposite to the first direction.

  According to such an electrode stacking apparatus, the first stacking table and the second stacking table are arranged in the same direction with respect to the transport mechanism that forms a linear transport path. The first stacking table transferred by the transfer mechanism is received and supported by the first receiving unit of the first turntable, and the second stacking table transferred by the transfer mechanism is received by the second receiving table of the second turntable. Received and supported by the department. Here, the first rotating shaft and the second rotating shaft rotate in opposite directions. For this reason, after the first receiving unit receives the first stacking unit, the direction of the first stacking unit when the first rotation shaft rotates 90 ° and the second receiving unit receives the second stacking unit. The directions of the second stacking table when the second rotation shaft rotates 90 ° are opposite to each other. As a result, even if the tabs of the electrodes respectively supplied by the pair of conveyors protrude in opposite directions, the first receiving portion can be connected to one of the pair of electrodes without aligning the directions of the tabs. And the other of the pair of electrodes can be stacked on the second stacking table supported by the second receiving unit. Therefore, according to the above electrode stacking apparatus, it is possible to efficiently manufacture a stacked body without aligning the direction of a pair of electrodes formed by double striping or the like.

  Further, the first stacking table located at the first supply position and the second stacking table positioned at the second supply position may be opposite to each other.

  ADVANTAGE OF THE INVENTION According to this invention, a laminated body can be manufactured efficiently, without aligning the direction of a pair of electrode formed by double striping etc.

It is sectional drawing which shows the internal structure of the electrical storage apparatus manufactured by applying the electrode lamination apparatus which concerns on this embodiment. It is the II-II sectional view taken on the line of FIG. It is a top view of the positive electrode with a separator and negative electrode which were shown by FIG. It is a plane schematic diagram which shows the electrode lamination apparatus which concerns on this embodiment. It is a side surface schematic diagram which shows the electrode lamination apparatus which concerns on this embodiment. 6A is a perspective view of the stacking table, FIG. 6B is a plan view of the stacking table, and FIG. 6C is a sectional view taken along line VIc-VIc in FIG. is there. It is a schematic side view which shows a 1st turntable. It is an expansion schematic diagram for demonstrating supply to the lamination stand of the electrode formed in the electrode supply mechanism. It is a flowchart explaining operation | movement with a conveyance mechanism and a 1st turntable. It is a flowchart explaining operation | movement with a conveyance mechanism and a 2nd turntable. FIG. 11A is an enlarged side view of a part of an electrode stacking apparatus according to a modification. FIG.11 (b) is the XIb-XIb sectional view taken on the line of Fig.11 (a).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a cross-sectional view showing an internal configuration of a power storage device manufactured by applying the electrode stacking apparatus according to this embodiment. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a plan view of the positive electrode with the separator and the negative electrode shown in FIG. In each figure, the power storage device 1 is a lithium ion secondary battery having a stacked electrode assembly.

  The power storage device 1 includes a case 2 having a substantially rectangular parallelepiped shape, for example, and an electrode assembly 3 accommodated in the case 2. The case 2 is made of a metal such as aluminum. Although not shown, for example, a non-aqueous (organic solvent) electrolyte is injected into the case 2. On the case 2, the positive terminal 4 and the negative terminal 5 are arranged so as to be separated from each other. The positive terminal 4 is fixed to the case 2 via an insulating ring 6, and the negative terminal 5 is fixed to the case 2 via an insulating ring 7. Although not shown, an insulating film is disposed between the electrode assembly 3 and the side and bottom surfaces inside the case 2 by wrapping the electrode assembly 3, and the case 2 and the electrode assembly are separated by the insulating film. 3 is insulated. In FIG. 1, for the sake of convenience, a slight gap is provided between the lower end of the electrode assembly 3 and the bottom surface of the case 2, but actually the lower end of the electrode assembly 3 is located inside the case 2 via an insulating film. Touching the bottom. A gap may be formed between the electrode assembly 3 and the case 2 by arranging a spacer between the electrode assembly 3 and the case 2.

  The electrode assembly 3 has a structure in which a plurality of sheet-like positive electrodes 8 and a plurality of sheet-like negative electrodes 9 are alternately stacked via bag-like separators 10. The positive electrode 8 is wrapped in a bag-like separator 10. The positive electrode 8 wrapped in the bag-shaped separator 10 is configured as a positive electrode 11 with a separator. Therefore, the electrode assembly 3 has a structure in which the negative electrodes 9 are disposed at both ends thereof, and a plurality of separator-attached positive electrodes 11 and a plurality of negative electrodes 9 are alternately stacked inside thereof.

  As illustrated in FIG. 3A, the separator 10 has a rectangular shape in plan view. The horizontal dimension (dimension in the X direction in the figure) of the separator 10 is larger than the vertical dimension (dimension in the Y direction in the figure) of the separator 10. The positive electrode 8 includes a positive electrode main body portion 8a having a rectangular shape in plan view, and a positive electrode tab 8b integrated with the positive electrode main body portion 8a. The horizontal dimension of the positive electrode main body part 8a is larger than the vertical dimension of the positive electrode main body part 8a. The positive electrode tab 8b constitutes a protruding portion that protrudes from an edge in the vicinity of one end portion in the lateral direction (longitudinal direction) of the positive electrode main body portion 8a. The positive electrode tab 8 b is exposed from the separator 10. The positive electrode tab 8b is connected to the positive electrode terminal 4 via the conductive member 12, as shown in FIG.

  As shown in FIG. 3B, the negative electrode 9 includes a negative electrode main body 9a having a rectangular shape in plan view, and a negative electrode tab 9b integrated with the negative electrode main body 9a. The horizontal dimension of the negative electrode main body 9a is larger than the vertical dimension of the negative electrode main body 9a. The negative electrode tab 9b constitutes a protruding portion that protrudes from an edge in the vicinity of one end portion in the lateral direction (longitudinal direction) of the negative electrode main body portion 9a. The negative electrode tab 9b is connected to the negative electrode terminal 5 via the conductive member 13, as shown in FIG.

  As shown in FIG. 2, the positive electrode 8 includes a metal foil 14 made of, for example, an aluminum foil, and a positive electrode active material layer 15 formed on both surfaces of the metal foil 14. The positive electrode active material layer 15 is formed in a region of the metal foil 14 excluding the edge on the positive electrode tab 8b side of the positive electrode main body 8a and the positive electrode tab 8b. In FIG. 2, the positive electrode tab 8b is omitted for convenience. The positive electrode active material layer 15 is a porous layer formed including a positive electrode active material and a binder. Examples of the positive electrode active material include composite oxide, metallic lithium, and sulfur. The composite oxide includes, for example, at least one of manganese, nickel, cobalt, and aluminum and lithium.

  As shown in FIG. 2, the negative electrode 9 includes a metal foil 16 made of, for example, copper foil, and a negative electrode active material layer 17 formed on both surfaces of the metal foil 16. The negative electrode active material layer 17 is formed in a region excluding the edge on the negative electrode tab 9 b side of the negative electrode main body 9 a and the negative electrode tab 9 b in the metal foil 16. In FIG. 2, the negative electrode tab 9b is omitted for convenience. The negative electrode active material layer 17 is a porous layer formed including a negative electrode active material and a binder. Examples of the negative electrode active material include carbon such as graphite, highly oriented graphite, mesocarbon microbeads, hard carbon, and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5 ≦ x ≦ 1.5 ) Or boron-containing carbon.

  Examples of the material for forming the separator 10 include a porous film made of a polyolefin-based resin such as polyethylene (PE) and polypropylene (PP), or a woven or non-woven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose, or the like. .

  When manufacturing the power storage device 1 configured as described above, first, the positive electrode 11 with a separator and the negative electrode 9 are produced, and then the positive electrode 11 with a separator and the negative electrode 9 are alternately laminated to obtain a laminate. Then, the electrode assembly 3 is obtained by fixing the positive electrode 11 with a separator and the negative electrode 9 which comprise a laminated body with a tape. Then, the positive electrode tab 8b of the positive electrode 8 is connected to the positive electrode terminal 4 via the conductive member 12, and the negative electrode tab 9b of the negative electrode 9 is connected to the negative electrode terminal 5 via the conductive member 13, and then the electrode assembly 3 is attached to the case. 2 to accommodate. In addition, the detail of the method of manufacturing the laminated body by laminating | stacking the positive electrode 11 with a separator and the negative electrode 9 alternately is mentioned later.

  FIG. 4 is a schematic plan view showing the electrode stacking apparatus according to this embodiment. FIG. 5 is a schematic side view showing the electrode stacking apparatus according to this embodiment. As shown in FIGS. 4 and 5, the electrode stacking apparatus 100 includes, as main components, a transport mechanism 20, a stacking table 30, a first rotating table 40, a second rotating table 60, and an electrode supply mechanism. 70, a first inspection device 81, and a second inspection device 82. Hereinafter, the conveyance direction of the conveyance mechanism 20 in FIGS. In addition, a direction orthogonal to the direction α in the horizontal plane is defined as a direction β, and a direction orthogonal to the direction α and the direction β is defined as a direction γ that is the vertical direction (vertical direction). Each of the direction α, the direction β, and the direction γ is not limited to one direction. For example, the direction α includes not only the downstream direction but also the upstream direction in the transport direction of the transport mechanism 20.

  First, the configuration of the transport mechanism 20 will be described. The transport mechanism 20 is a mechanism that transports the stacking table 30 as a transported object to a predetermined position. The transport mechanism 20 includes a first transport unit 21 that transports an empty stack base 30 toward one side in the direction α, and a stack in which a stack E in which the positive electrodes 11 and the negative electrodes 9 with separators are alternately stacked is accommodated. And a second conveyance unit 22 that conveys the table 30 toward the other side in the direction α. The first transport unit 21 and the second transport unit 22 extend along the direction α. Further, the first transport unit 21 and the second transport unit 22 overlap each other in plan view, and the first transport unit 21 is located below the second transport unit 22 in the direction γ. A distance D1 in the direction γ between the first transport unit 21 and the second transport unit 22 is set to be larger than at least the height at which the two stacking tables 30 are stacked.

  The first transport unit 21 includes transporters 23A to 23C extending along the direction α, a stopper 24A provided in the transporter 23A, a stopper 24B provided in the transporter 23B, and a stopper 24C provided in the transporter 23C. With. That is, the transfer machines 23A to 23C form a linear transfer path.

  The transporters 23 </ b> A to 23 </ b> C are separated from each other along the direction α and are provided in order along the transport direction of the first transport unit 21. The transporter 23A is located on the most upstream side in the transport direction of the first transport unit 21. Each of the conveyors 23A to 23C is a pair of belt conveyors that are rotationally driven by, for example, a pulley and a motor. The pair of belt conveyors extend along the direction α and are separated from each other in the direction β. Each of the transporters 23A to 23C may be configured by a rail or the like. The separation distance along the direction α between the transfer machine 23A and the transfer machine 23B is equal to or greater than the width of the holding portion 64 (details will be described later) of the second turntable 60, and is transferred from the transfer machine 23A to the transfer machine 23B. The stacking table 30 may be a distance that does not fall before reaching the transport machine 23B. Similarly, the separation distance along the direction α between the transfer machine 23B and the transfer machine 23C is equal to or greater than the width of the holding portion 44 (details will be described later) of the first turntable 40, and the transfer machine 23B to the transfer machine 23C. It is sufficient that the stacking table 30 to be transported to the distance that does not fall before reaching the transporting machine 23C.

  The stoppers 24 </ b> A to 24 </ b> C block the stacking table 30 transported by the first transport unit 21. The stoppers 24 </ b> A to 24 </ b> C include, for example, a damming portion that can expand and contract in a direction γ, and a main body portion that can accommodate the damming portion. The stopper 24A is provided on the upstream side in the transport direction in the transport machine 23A, and hinders the transport of the stacking table 30 toward the transport machine 23B. The stopper 24B is provided at the end of the transport machine 23B on the transport machine 23A side, and prevents the stacking table 30 from being transported from the transport machine 23A to the transport machine 23B. The stopper 24 </ b> C is provided at the end of the transport machine 23 </ b> C on the transport machine 23 </ b> B side and prevents the transport of the stacking table 30 from the transport machine 23 </ b> B to the transport machine 23 </ b> C.

  The second transport unit 22 includes transporters 25A to 25C extending along the direction α, a stopper 26A provided on the transporter 25A, and a stopper 26B provided on the transporter 25B.

  The transporters 25 </ b> A to 25 </ b> C are separated from each other along the direction α and are provided in order along the transport direction of the second transport unit 22. The transporter 25 </ b> C is located on the most upstream side in the transport direction of the first transport unit 21. Each of the transporters 25A to 25C is a pair of belt conveyors that are rotationally driven by, for example, a pulley and a motor. The pair of belt conveyors extend along the direction α and are separated from each other in the direction β. Each of the transporters 25A to 25C may be configured by a rail or the like. Further, the transporter 25A has substantially the same shape as the transporter 23A, and overlaps the transporter 23A so as to completely hide the transporter 23A in plan view. Similarly, the transport machine 25B has substantially the same shape as the transport machine 23B, and overlaps the transport machine 23B so as to completely hide the transport machine 23B in plan view. The transport machine 25C And overlaps with the transport device 23C so as to completely hide the transport device 23C in plan view. Therefore, the separation distance along the direction α between the transport machine 25A and the transport machine 25B is substantially the same as the separation distance along the direction α between the transport machine 23A and the transport machine 23B. Similarly, the separation distance along the direction α between the transport machine 25B and the transport machine 25C is substantially the same as the separation distance along the direction α between the transport machine 23B and the transport machine 23C.

  The stoppers 26 </ b> A and 26 </ b> B block the stacking table 30 transported by the second transport unit 22. The stoppers 26 </ b> A and 26 </ b> B have, for example, a damming portion that can be expanded and contracted in the direction γ, and a main body portion that can accommodate the damming portion. The stopper 26 </ b> A is provided at the end of the transporter 25 </ b> A on the transporter 25 </ b> B side, and prevents the stacking table 30 from being transported to the transporter 25 </ b> A. The stopper 26B is provided at the end of the transport machine 25B on the transport machine 23C side, and prevents the stacking table 30 from being transported to the transport machine 25B.

  Next, the configuration of the stacking table 30 will be described with reference to FIGS. 6A is a perspective view of the stacking table, FIG. 6B is a plan view of the stacking table, and FIG. 6C is a sectional view taken along line VIc-VIc in FIG. is there.

  6 (a) to 6 (c) are stacked by stacking electrodes (the positive electrode 11 with the separator 11 and the negative electrode 9) that are transported by the transport mechanism 20 and dropped from the electrode supply mechanism 70. E is a base on which a main body 32 having a main surface 31, a positioning wall 33, a first side wall 34, a second side wall 35, and a bottom 36 are provided. Hereinafter, the shape and the like of the stacking table 30 will be described based on the state in which the stacking table 30 is placed on the transport mechanism 20.

  The main surface 31 of the main body portion 32 is a surface on which the positive electrode 11 with a separator and the negative electrode 9 are laminated. The main surface 31 includes a first side 31a and a second side 31b extending substantially parallel to each other along the direction α, and a third side 31c and a fourth side 31d extending substantially parallel to each other along the direction β. Have The first side 31a and the second side 31b are opposed to each other, and the third side 31c and the fourth side 31d are opposed to each other. The first side 31a (second side 31b) and the third side 31c (fourth side 31d) extend so as to be substantially orthogonal to each other.

  A part of the main body 32 is cut out by a pair of first cutouts 37 so that a part of the laminated body is exposed from the main surface 31 when the laminated body is manufactured on the laminated base 30. Specifically, the intersection of the first side 31 a and the third side 31 c on the main surface 31 and the main body portion 32 at the periphery thereof are cut out by one first cutout portion 37, and the first surface 31 on the main surface 31 is first. The body portion 32 at the intersection of the side 31a and the fourth side 31d and the periphery thereof is cut out by the other first cutout portion 37. For this reason, the length of the first side 31a is shorter than the length of the second side 31b. In addition, a pair of 1st notch part 37 is a mere name, and does not need to be provided by actually notching a part of the lamination | stacking stand 30. FIG. For example, when the stacking table 30 is made of resin and the stacking table 30 is formed by injection molding, the first notch 37 is formed on the stacking table 30 using a mold in which the first notch 37 is provided. Also good.

  Further, the other part of the main body 32 is notched by the pair of second notch portions 38 so that a part of the laminate is exposed from the main surface 31 when the laminate is manufactured on the stacking table 30. It is. Specifically, a part of the main body portion 32 on the third side 31c side and in the direction β on the second side 31b side with respect to the one first notch portion 37 is notched by the one second notch portion 38. A part of the main body portion 32 on the fourth side 31d side and in the direction β on the second side 31b side with respect to the other first notch portion 37 is notched by the other second notch portion 38. . Therefore, each of the third side 31c and the fourth side 31d is divided into two, and the shape of the main surface 31 in plan view is determined by the pair of first cutout portions 37 and the pair of second cutout portions 38. A part of a substantially rectangular shape is cut out. The pair of second cutout portions 38 are simply names like the first cutout portion 37 and may not be provided by actually cutting out a part of the stacking table 30.

  By providing the first cutout portion 37 and the second cutout portion 38 in the main body portion 32, a part of the portion in contact with the main surface 31 in the laminated body manufactured on the laminated base 30 is exposed from the laminated base 30. In this case, for example, in a state where the laminated body E is stored in the laminated base 30, a tape is applied to the laminated body E at the first cutout portion 37 and the second cutout portion 38, and the electrodes forming the laminated body E are mutually connected. Can be fixed. Thereafter, in the first cutout portion 37 and the second cutout portion 38, the stack E is easily taken out from the stack base 30 by holding and lifting the part of the stack E by a pickup device such as a robot arm. Can do.

  The positioning wall 33 extends along the first side 31 a of the main surface 31 in the main body portion 32 and is erected upward in the direction γ. The positioning wall 33 comes into contact with the end portion (lower end portion) of the positive electrode with separator 11 placed on the main surface 31 on the side where the positive electrode tab 8b is not provided, so that the positive electrode with separator 11 dropped on the stacking table 30. Stop. Similarly, the positioning wall 33 contacts the end portion (lower end portion) of the negative electrode 9 placed on the main surface 31 on the side where the negative electrode tab 9b is not provided. Stop. Therefore, the positioning wall 33 functions as a guide for determining and aligning the positions of the lower end portions of the positive electrode 11 with separator and the negative electrode 9 stacked on the main surface 31.

  The first side wall 34 extends along the third side 31 c of the main surface 31 in the main body 32 and is erected upward in the direction γ. The first side wall 34 includes a first portion 34 a erected along the third side 31 c closer to the first side 31 a than the one second notch 38, and the second side 31 b than the one second notch 38. And a second portion 34b erected along the third side 31c on the side. A tapered portion 34c that is inclined so as to approach the fourth side 31d from the second side 31b toward the first side 31a in a plan view is provided inside the end of the second portion 34b on the second side 31b side. It has been. The distance L1 from the positioning wall 33 along the direction β to the second portion 34b is shorter than the length of the positive electrode main body portion 8a and the negative electrode main body portion 9a in the vertical direction (short direction).

  The second side wall 35 extends along the fourth side 31 d of the main surface 31 in the main body 32 and is erected upward in the direction γ. The second side wall 35 includes a first portion 35a erected along the fourth side 31d closer to the first side 31a than the other second cutout portion 38, and a second side 31b than the other second cutout portion 38. And a second portion 35b erected along the fourth side 31d. A tapered portion 35c that is inclined so as to approach the third side 31c from the second side 31b toward the first side 31a in plan view is provided inside the end of the second portion 35b on the second side 31b side. It has been. A distance L2 from the positioning wall 33 along the direction β to the second portion 35b is shorter than the length of the positive electrode main body portion 8a and the negative electrode main body portion 9a in the vertical direction (short direction). The distance along the direction α (or the extending direction of the first side 31a) between the first side wall 34 and the second side wall 35 is equal to or longer than the length in the longitudinal direction of the positive electrode 11 with a separator.

  The bottom portion 36 is a portion protruding downward from the main body portion 32 in the direction γ. The length along the direction α of the bottom portion 36 is substantially the same as the length of the first side 31a, and is shorter than the length of the second side 31b. Further, the bottom portion 36 in the direction β is located on the second side 31b side with respect to the positioning wall 33 and on the first side 31a side with respect to the tapered portion 34c of the first side wall 34. In addition, the bottom portion 36 is provided with recesses 39a and 39b into which protrusions 44b and 44c (see FIG. 7A) provided on the holding portion 44 described later are fitted. The depressions 39a and 39b are provided away from each other along the direction β. The depression 39a is provided closer to the first side 31a than the center of the bottom 36 in the direction β, and the depression 39b is provided closer to the second side 31b than the center of the bottom 36 in the direction β. Further, when the stacking table 30 is transported to the transport mechanism 20, the bottom portion 36 is accommodated in a space between a pair of belt conveyors that respectively configure the transporters 23A to 23C and 25A to 25C. Thereby, the posture of the stacking table 30 transported by the transport mechanism 20 is kept constant by the bottom portion 36.

  Next, the structure of the 1st turntable 40 is demonstrated, using FIG.4 and FIG.7. FIGS. 7A to 7C are schematic side views showing the first turntable. As shown in FIG. 4 and FIGS. 7A to 7C, the first turntable 40 is disposed on one side (the right side in FIG. 4) in the direction β with respect to the transport mechanism 20. A main body 41, a rotating plate 42 (first rotating unit) that rotates clockwise (first direction) in plan view, and a receiving unit that is attached to the rotating plate 42 and receives the stacking table 30 from the transport mechanism 20 43A to 43D (first receiving unit).

  The main body 41 includes a pedestal 41a installed on the floor and a drive 41b that rotates the rotating plate 42. The drive part 41b has a substantially cylindrical shape, and is a part protruding upward along the direction γ from the center of the pedestal part 41a. The drive unit 41b accommodates, for example, a drive shaft (first rotation shaft) that is attached to the rotating plate 42 and rotates clockwise, a motor for driving the drive shaft, and the like.

  The rotating plate 42 is a plate-like member having a circular shape in plan view. For example, when the drive shaft of the main body 41 is fixed to the center of the rotating plate 42, the rotating plate 42 rotates clockwise in plan view. The rotating plate 42 rotates intermittently under the control of the drive unit 41b. The intermittent rotation of the rotating plate 42 may be synchronized with the driving of the electrode supply mechanism 70.

  Each of the receiving units 43 </ b> A to 43 </ b> D receives the stacking table 30 from the transfer machine 23 </ b> B of the first transfer unit 21 and places the stacking table 30 on the transfer machines 25 </ b> B and 25 </ b> C of the second transfer unit 22. The receiving portions 43 </ b> A to 43 </ b> D are provided on the rotating plate 42 with a certain interval along the circumferential direction of the rotating plate 42. In the present embodiment, the receiving units 43B to 43D on the rotating plate 42 are provided in order every 90 ° along the clockwise direction with the receiving unit 43A as a reference. The receiving units 43 </ b> A to 43 </ b> D rotate clockwise in conjunction with the rotation of the drive shaft and the rotating plate 42. At this time, the receiving units 43 </ b> A to 43 </ b> D rotate about the drive shaft of the main body 41. 4 and 5, the receiving unit 43D is located between the transporters 25B and 25C so as to be orthogonal to the first transport unit 21 and the second transport unit 22 in plan view. Each of the receiving units 43A to 43D includes a holding unit 44 (first holding unit) that holds (supports) the stacking table 30 received from the transport mechanism 20, and an elevating mechanism 45 that can freely move the holding unit 44 up and down (first). 1 lifting mechanism).

  The holding unit 44 is attached to the rotating plate 42 via an elevating mechanism 45, and is controlled between the conveyors 23 </ b> B and 23 </ b> C in the first conveying unit 21 and the first by the rotation of the rotating plate 42 and the control by the elevating mechanism 45. 2 is a plate-like member that can be arranged between the transporters 25B and 25C in the transport unit 22. The holding portion 44 has a plate-like main body portion 44a and protrusions 44b and 44c for fitting into the recesses 39a and 39b of the stacking base 30 as described above. The protrusions 44b and 44c are provided on the upper surface of the main body 44a and on the radially outer side of the rotating plate 42 in the main body 44a. The protrusions 44b and 44c are provided symmetrically with respect to the center of the main body 44a. The protrusion 44c is provided on the outer side in the radial direction of the rotating plate 42 in the main body 44a than the protrusion 44b.

  The elevating mechanism 45 changes the position of the holding unit 44 in the direction γ and adjusts the inclination angle of the holding unit 44. The elevating mechanism 45 may change the position of the holding unit 44 above the second transfer unit 22 of the transfer mechanism 20, and may change the position of the holding unit 44 below the first transfer unit 21. The elevating mechanism 45 includes a first elevating part 46 and a second elevating part 47 that are separated from each other in the radial direction of the rotating plate 42. The first elevating part 46 is located on the radial center side of the rotating plate 42 with respect to the second elevating part 47.

  The first elevating unit 46 and the second elevating unit 47 are separated from each other and controlled independently of each other. For this reason, the raising / lowering degree of the 1st raising / lowering part 46 and the raising / lowering degree of the 2nd raising / lowering part 47 may mutually differ. For example, when the raising / lowering degree of the first raising / lowering part 46 is smaller than the raising / lowering degree of the second raising / lowering part 47 in the receiving part 43A, as shown in FIG. The holding portion 44 is inclined such that the end portion of the holding portion 44 is located above the end portion on the radial center side of the holding portion 44. Further, in the receiving part 43A, when the elevation degree of the first raising / lowering part 46 is larger than the elevation degree of the second raising / lowering part 47, as shown in FIG. The holding portion 44 is inclined such that the end portion of the holding portion 44 is positioned below the end portion on the radial center side of the holding portion 44. In addition, in the 1st turntable 40 of this embodiment, the state of FIG.7 (c) is not used.

  The first elevating part 46 has a cylinder part 48 that can be expanded and contracted along the direction γ, and a tip part 49 that is attached to the tip of the cylinder part 48 and fixed to the holding part 44. The cylinder portion 48 includes a drive shaft 48a that is driven along the direction γ, and a hollow cylindrical portion 48b that houses the drive shaft 48a. The distal end portion 49 is provided at the distal end of the drive shaft 48 a and transmits a force along the direction γ by the drive shaft 48 a to the holding portion 44. The tip 49 is fixed to the bottom surface of the main body 44a so as to be freely rotatable. The tip 49 is, for example, a knuckle joint. In this case, a fixing portion for fixing the link rotating portion is provided on the bottom surface of the holding portion 44. By fixing the distal end portion 49 to the holding portion 44, it is possible to prevent the holding portion 44 from falling off the lifting mechanism 45.

  The second elevating part 47 includes a cylinder part 50 that can be expanded and contracted along the direction γ, and a tip part 51 that is attached to the tip of the cylinder part 50 and contacts the main body 44 a of the holding part 44. The cylinder portion 50 includes a drive shaft 50a that is driven along the direction γ, and a hollow cylindrical portion 50b that houses the drive shaft 50a.

  The distal end portion 51 is provided at the distal end of the drive shaft 50 a and transmits a force along the direction γ by the drive shaft 50 a to the holding portion 44. As the tip 51, a rotating member that is rotatably attached to the tip of the drive shaft 50a is used. Examples of the rotating member include a cam follower or a bearing having a ring shape when viewed from the horizontal direction perpendicular to the direction in which the first elevating part 46 and the second elevating part 47 are separated from each other. It only needs to be rotatable clockwise and counterclockwise as an axis. Since the tip 51 is the rotating member, the tip 51 can reduce wear due to friction with the main body 44a.

  Next, the second turntable 60 will be described. The second turntable 60 shown in FIG. 4 is arranged on the opposite side (left side in FIG. 4) from the side where the first turntable 40 is provided in the direction β with respect to the transport mechanism 20. That is, the first turntable 40 and the second turntable 60 are provided on the opposite sides with respect to the transport mechanism 20 in the direction β. The second turntable 60 has the same function and the same shape as the first turntable 40 except that the rotation direction of the rotation plate 62 is counterclockwise (second direction). Accordingly, the second turntable 60 is attached to the main body (not shown), the rotating plate 62 (second rotating portion) that rotates counterclockwise in plan view, and the rotating plate 62. Receiving units 63A to 63D (second receiving units). The receiving parts 63 </ b> A to 63 </ b> D are provided on the rotating plate 62 at regular intervals along the circumferential direction of the rotating plate 62. In the present embodiment, the receiving portions 63B to 63D on the rotating plate 62 are provided in order every 90 ° along the counterclockwise direction with the receiving portion 63A as a reference. The receiving parts 63A to 63D rotate counterclockwise as the rotating plate 62 rotates. At this time, the receiving units 63A to 63D rotate with the drive shaft (second rotation shaft) of the main body unit 61 as an axis in conjunction with the drive shaft. 4 and 5, the receiving unit 63D is located in a space between the transporters 25A and 25B so as to be orthogonal to the first transport unit 21 and the second transport unit 22 in plan view.

  Each of the receiving units 63 </ b> A to 63 </ b> D receives the stacking table 30 from the transfer machine 23 </ b> A of the first transfer unit 21, and places the stacking table 30 on the transfer machines 23 </ b> A and 23 </ b> B of the second transfer unit 22. For this reason, the second turntable 60 is located closer to the transporter 23A in the direction α than the first turntable 40. Further, the second turntable 60 and the first turntable 40 are disposed on opposite sides of the transport mechanism 20 in the direction β. Thereby, the stacking table 30 received by one of the first rotating table 40 and the second rotating table 60 comes into contact with the stacked table 30 received by the other of the first rotating table 40 and the second rotating table 60. Can be prevented.

  As shown in FIG. 5, each of the receiving parts 63 </ b> A to 63 </ b> D is similar to the receiving parts 43 </ b> A to 43 </ b> D of the first turntable 40 and has a plate-like holding part 64 (second support) that holds (supports) the stacked base 30. Holding portion) and a lifting mechanism 65 (second lifting mechanism) that changes the position of the holding portion 64 in the direction γ and adjusts the inclination angle of the holding portion 64. The holding part 64 has a main body part 64 a and protrusions 64 b and 64 c, similarly to the holding part 44 of the first turntable 40. The elevating mechanism 65 includes a first elevating unit 66 and a second elevating unit 67 that are separated from each other and controlled independently from each other, like the elevating mechanism 45 of the first turntable 40. The first elevating part 66 is attached to the cylinder part that can be expanded and contracted along the direction γ and the tip of the cylinder part and fixed to the holding part 64 in the same manner as the first elevating part 46 of the first turntable 40. And a tip. Similarly to the second lifting / lowering part 47 of the first turntable 40, the second lifting / lowering part 67 has a cylinder part that can be expanded and contracted along the direction γ and a tip that is attached to the tip of the cylinder part and contacts the holding part 64. Part. In addition, in the 2nd turntable 60 of this embodiment, the state of FIG.7 (b) is not used.

  Next, a schematic configuration of the electrode supply mechanism 70 will be described with reference to FIGS. 4 and 8. FIG. 8 is an enlarged schematic view for explaining supply of the electrodes formed in the electrode supply mechanism to the stacking base. The electrode supply mechanism 70 shown in FIGS. 4 and 8 drops the separator-attached positive electrode 11 and the negative electrode 9 onto the stacking table 30 held by the first rotating table 40 or the second rotating table 60. It is a device to supply. The electrode supply mechanism 70 includes a first electrode supply unit 71 that supplies the positive electrode 8 and a second electrode supply unit 72 that supplies the negative electrode 9. The first electrode supply unit 71 and the second electrode supply unit 72 are disposed to face each other with at least the transport mechanism 20 in the direction β and from the first turntable 40 and the second turntable 60 in the direction γ. Is also located above.

  In the positive electrode production line, which is a pre-process of the production line, for the first electrode supply unit 71, the strip-shaped electrode 73 is processed to form the individual positive electrode 8, and then the positive electrode 8 with a separator is wrapped with the separator 10. 11 is formed. The first electrode supply unit 71 is a pair of conveyors 71a and 71b extending in parallel. The conveyors 71a and 71b respectively transport the pair of separator-equipped positive electrodes 11 formed in the previous process along the direction β, and drop and supply them to the stacking table 30 disposed at the corresponding supply position. Each of the conveyors 71a and 71b which are the 1st electrode supply part 71 is a roller conveyor, although not shown in figure. Each of the conveyors 71 a and 71 b may include a guide member that aligns the position of the positive electrode with separator 11 in the direction α immediately before supplying the positive electrode with separator 11 to the stacking table 30 along the direction β. Further, as the conveyors 71a and 71b, other conveying devices such as a belt conveyor may be used. The conveyor 71 a extends toward the first turntable 40, and the conveyor 71 b extends toward the second turntable 60.

  About the 2nd electrode supply part 72, in the negative electrode manufacturing line which is a pre-process of a manufacturing line, the strip | belt-shaped electrode 74 is processed and the piece-like negative electrode 9 is formed. The second electrode supply unit 72 is a pair of conveyors 72a and 72b extending in parallel. The conveyors 72a and 72b respectively transport the pair of negative electrodes 9 formed in the previous process along the direction β, and drop and supply them to the stacking table 30 disposed at the corresponding supply position. Each of the conveyors 72a and 72b is a roller conveyor, for example, similarly to the conveyors 71a and 71b, and may be another conveying device such as a belt conveyor. The conveyor 72 a extends toward the first turntable 40, and the conveyor 72 b extends toward the second turntable 60.

  The strip electrode 73 is composed of a strip (rectangular) metal foil (for example, an aluminum foil) having a positive electrode active material formed on both surfaces thereof. The longitudinal direction of the strip electrode 73 coincides with the direction in which the first electrode supply unit 71 supplies the positive electrode 8 (the positive electrode 11 with the separator). The short direction of the strip electrode 73 is orthogonal to the long direction. In addition, the positive electrode active material is not provided in the both ends of the transversal direction in the strip electrode 73.

  Similar to the strip electrode 73, the strip electrode 74 is composed of a strip (rectangular) metal foil (for example, copper foil) having a negative electrode active material formed on both surfaces thereof. The longitudinal direction of the strip electrode 74 coincides with the direction in which the second electrode supply unit 72 supplies the negative electrode 9. The short direction of the strip electrode 74 is orthogonal to the long direction. Note that the negative electrode active material is not provided at both ends of the strip electrode 74 in the short direction. The longitudinal direction of the strip electrode 74 may coincide with the longitudinal direction of the strip electrode 73.

  Next, an example of a method for forming an electrode supplied to the electrode supply mechanism 70 and an example of an electrode supply method by the electrode supply mechanism 70 will be described. First, the separator-attached positive electrode 11 is formed from the strip-shaped electrode 73, and the stacking table 30 held by the receiving units 43 </ b> A to 43 </ b> D of the first turntable 40 and the stacking units held by the receiving units 63 </ b> A to 63 </ b> D of the second turntable 60. A method of supplying the separator-equipped positive electrode 11 to each of the tables 30 will be described.

  First, the positive electrode is punched in the pre-process of the first electrode supply unit 71, and the positive electrode 8 is formed by punching the belt-like electrode 73 into a predetermined shape by, for example, press cutting. As shown in FIG. 8, so-called double striping is performed on the strip electrode 73 to form a pair of positive electrodes 8. The double striping in the present embodiment is to form a pair of positive electrodes 8 side by side in the lateral direction from the strip-shaped electrode 73 defined within a predetermined range in the longitudinal direction. As described above, the positive electrode active material is provided in a region other than both ends of the strip electrode 73 in the short direction. Therefore, a pair of positive electrodes 8 in which the positive electrode tabs 8b protrude in opposite directions in the short direction is formed by the positive electrode punching.

  The pair of positive electrodes 8 formed by two strips from the strip electrode 73 is processed into the separator-equipped positive electrode 11 by the separator packaging machine, and then placed on the conveyors 71a and 71b without changing their orientation. . That is, the positive electrode 11 with one separator is conveyed by the conveyor 71a extending toward the first turntable 40 without changing its orientation, and the positive electrode 11 with the other separator is transferred to the second turntable 60. The conveyor 71b extends toward the conveyor without changing its direction. And one positive electrode 11 with a separator falls and is supplied to the lamination | stacking stand 30 hold | maintained by the receiving parts 43A-43D of the 1st turntable 40. FIG. Specifically, as shown in FIG. 8, the separator-attached positive electrode 11 from which the positive electrode tab 8 b protrudes downstream in the conveyance direction of the first conveyance unit 21 is held by the receiving unit 43 </ b> A of the first turntable 40. It is dropped and supplied to the stacking table 30. The other separator-attached positive electrode 11 is dropped and supplied to the stacking table 30 held by the receiving units 63A to 63D of the second turntable 60. Specifically, as shown in FIG. 8, the separator-attached positive electrode 11 from which the positive electrode tab 8 b protrudes upstream in the conveyance direction of the first conveyance unit 21 is held by the receiving unit 63 </ b> A of the second turntable 60. It is dropped and supplied to the stacking table 30.

  Next, the negative electrode 9 is formed from the strip electrode 74, and the stacked stage 30 held by the receiving parts 43A to 43D of the first turntable 40 and the stacked stage held by the receiving parts 63A to 63D of the second turntable 60. A method of supplying the negative electrode 9 to each of 30 will be described.

  First, the negative electrode punching in the pre-process of the second electrode supply unit 72 forms the negative electrode 9 by punching the strip electrode 74 into a predetermined shape by, for example, press cutting. As shown in FIG. 8, two strips are formed on the strip electrode 74 in the same manner as the pair of positive electrodes 8 to form the pair of negative electrodes 9. The negative electrode punching forms a pair of negative electrodes 9 in which the negative electrode tabs 9b protrude in opposite directions in the short direction, similarly to the positive electrode punching.

  The pair of negative electrodes 9 are conveyed by the corresponding conveyors 72a and 72b without changing their orientation. That is, one negative electrode 9 is placed without changing its orientation by the conveyor 72a extending toward the first turntable 40. The other negative electrode 9 is placed on the conveyor 72b extending toward the second turntable 60 without changing its orientation. One negative electrode 9 is dropped and supplied to the stacking table 30 held by the receiving units 43 </ b> A to 43 </ b> D of the first turntable 40. Specifically, as illustrated in FIG. 8, the negative electrode 9 from which the negative electrode tab 9 b protrudes downstream in the conveyance direction of the first conveyance unit 21 is stacked on the receiving unit 43 </ b> A of the first turntable 40. It is dropped and supplied to the table 30. The other negative electrode 9 drops and is supplied to the stacking table 30 held by the receiving parts 63 </ b> A to 63 </ b> D of the second turntable 60. Specifically, as shown in FIG. 8, the negative electrode 9 from which the negative electrode tab 9 b protrudes upstream in the transport direction of the first transport unit 21 is a stack that is held by the receiving unit 63 </ b> A of the second turntable 60. It is dropped and supplied to the table 30.

  One stacked positive electrode 11 and one negative electrode 9 are alternately supplied to the stacking table 30 held by the receiving units 43 </ b> A to 43 </ b> D of the first turntable 40. Thereby, the laminated body 30 is formed with a laminated body E (see FIG. 4) in which one separator-attached positive electrode 11 and one negative electrode 9 are alternately laminated. Similarly, the other positive electrode 11 with the separator and the other negative electrode 9 are alternately supplied to the stacked base 30 held by the receiving parts 63A to 63D of the second turntable 60. Thereby, the laminated body 30 (refer FIG. 4) in which the other positive electrode 11 with a separator and the other negative electrode 9 were laminated | stacked alternately is formed.

  Next, the first inspection device 81 and the second inspection device 82 will be described with reference to FIGS. 4 and 8. As shown in FIGS. 4 and 8, the first inspection device 81 is an apparatus that inspects the stacked state of the stacked body E in the stacked table 30 held by the receiving units 43 </ b> A to 43 </ b> D of the first turntable 40. is there. The second inspection device 82 is a device that inspects the stacked state of the stacked body E in the stacked table 30 held by the receiving units 63 </ b> A to 63 </ b> D of the second turntable 60. The first inspection device 81 and the second inspection device 82 perform image processing by photographing the lower end and the side surface of the stacked body E exposed from the first cutout portion 37 (see FIG. 6B) of the stacked table 30. Thus, it is inspected that no deviation or the like occurs in the electrodes of the laminate E. As other methods, the first inspection apparatus 81 and the second inspection apparatus 82 are not misaligned with the electrodes of the multilayer E using an X-ray inspection apparatus, and are not mixed with a large foreign metal or the like in the multilayer E. You may check that.

  The first inspection device 81 is located closer to the first turntable 40 than the transport mechanism 20 in the direction β. Specifically, the first inspection device 81 is arranged so as to sandwich the first rotating table 40 between the first inspection device 81 and the transport mechanism 20 in the direction β. In the case of FIG. It arrange | positions so that it may oppose. On the other hand, the second inspection device 82 is located closer to the second turntable 60 than the transport mechanism 20 in the direction β. Specifically, the second inspection device 82 is arranged so that the second rotary table 60 is sandwiched between the second inspection device 82 and the transport mechanism 20 in the direction β. In the case of FIG. It arrange | positions so that it may oppose.

  Next, the operation of the electrode stacking apparatus 100 according to this embodiment will be described with reference to FIGS. FIG. 9 is a flowchart for explaining the operation of the transport mechanism and the first turntable. FIG. 10 is a flowchart for explaining the operation of the transport mechanism and the second turntable.

  First, with reference to FIG. 9, the first rotary table 40 receives a first stacking table, which will be described later, from the transport mechanism 20, and the first stacking table on which the stacked body E is formed is unloaded using the transport mechanism 20. The operation of the electrode stacking apparatus 100 will be described. Hereinafter, the stacking table 30 in which the stacked body E is accommodated is held by the receiving unit 43A in the first rotating table 40, and the stacking table 30 held by the receiving unit 43A is to be carried out to the transport mechanism 20. The operation of the electrode stacking apparatus 100 will be described in order from the point of time.

  First, the rotating plate 42 of the first turntable 40 is rotated (step S1). In step S1, the drive unit 41b rotates the rotating plate 42 by 90 degrees clockwise. Accordingly, one of the receiving units 43A to 43D (hereinafter, referred to as a receiving unit 43A) is disposed so as to overlap the transport mechanism 20. Specifically, the receiving unit 43A that receives the stacking table 30 in which the stacked body E is accommodated overlaps the space between the transporters 25B and 25C in the direction α (the space between the transporters 23B and 23C). Are arranged as follows. Further, the position of the holding unit 44 along the direction γ is located above the second transport unit 22 so that the holding unit 44 of the receiving unit 43A does not contact the transport mechanism 20.

  Next, the holding portion 44 of the receiving portion 43A is lowered by the lifting mechanism 45 (step S2). In step S2, the elevating mechanism 45 lowers the holding unit 44 until the stacking table 30 held by the holding unit 44 is placed on the transporters 25B and 25C. Here, the protrusions 44 b and 44 c provided on the holding portion 44 are fitted and engaged with the recesses 39 a and 39 b of the stacking table 30, respectively, and the blocking portion of the stopper 26 B shown in FIG. Since they are in contact with each other, the transport of the stacking table 30 by the transporters 25B and 25C is hindered.

  Next, the holding unit 44 of the receiving unit 43A is further lowered by the lifting mechanism 45, and the stacking table 30 is transported by the second transport unit 22 (step S3). In step S <b> 3, the lifting mechanism 45 lowers the holding unit 44 to the lower side of the first transport unit 21. Thereby, each fitting of the hollows 39a and 39b of the protrusions 44b and 44c is released. Further, when the clogging of the stacking table 30 by the stopper 26B shown in FIG. 4 is released, the second transport unit 22 transports the stacking table 30 along the direction α.

  Next, an empty stacking table 30 (hereinafter referred to as a first stacking table) is transferred by the first transfer unit 21 (step S4). In step S4, the first stacking table from the transfer machine 23A to the transfer machine 23C in the first transfer unit 21 is blocked by the stopper 24C shown in FIG. 4, and the transfer is interrupted. Accordingly, a part of the first stacking table including the recesses 39a and 39b overlaps the space between the transfer machines 23B and 23C in the direction α. Here, the empty stacking table 30 (hereinafter referred to as the second stacking table) transported by the first transport unit 21 next to the first stacking table is blocked by a stopper 24A shown in FIG. Transport is interrupted. Note that the second side walls 35 of all the stacking bases 30 that are transported by the first transport unit 21 are located on the downstream side in the transport direction of the first transport unit 21. That is, all the stacking tables 30 transported by the first transport unit 21 are transported such that the positioning walls 33, the first side walls 34, and the second side walls 35 are positioned in the same direction with respect to the main surface 31. It is arranged in the mechanism 20 and conveyed. In other words, the stacking tables 30 conveyed by the first conveying unit 21 are all conveyed in the same direction.

  Next, the holding portion 44 of the receiving portion 43A is raised by the lifting mechanism 45 (step S5). In step S <b> 5, the lifting mechanism 45 raises the holding unit 44 between the first transport unit 21 and the second transport unit 22 in the direction γ. By the movement of the holding portion 44 by the elevating mechanism 45, first, the holding portion 44 comes into contact with the first stacking base and the protrusions 44b and 44c are fitted and engaged with the recesses 39a and 39b, respectively. Then, the holding unit 44 lifts the first stacking table and raises the first stacking table above the first transport unit 21, whereby the receiving unit 43A receives the first stacking table. As described above, since the protrusions 44b and 44c of the holding unit 44 are fitted in the recesses 39a and 39b of the first stacking table, the first stacking table is stably held by the holding unit 44. The lifting mechanism 45 raises the holding unit 44 so that the first stacking table held by the holding unit 44 does not contact the second transport unit 22.

  Next, the rotating plate 42 of the first turntable 40 is rotated (step S6). In step S6, as in step S1, the drive unit 41b rotates the rotating plate 42 by 90 ° clockwise. As a result, the receiving unit 43A and the first stacking table are arranged in positions that do not overlap the transport mechanism 20 without contacting the first transport unit 21 and the second transport unit 22. In addition, the 1st edge | side 31a of a 1st lamination | stacking stand is located in the radial direction center side of the rotating plate 42 rather than the 2nd edge | side 31b.

  Next, the holding unit 44 of the receiving unit 43A and the first stacking table held by the holding unit 44 are tilted by the lifting mechanism 45 (step S7). In step S7, for example, as shown in FIG. 7B, the drive shafts 48a and 50a are moved so that the tip 51 of the second lift 47 is positioned above the tip 49 of the first lift 46. Drive. Accordingly, the holding portion 44 is inclined so that the end portion on the radial center side of the rotating plate 42 of the holding portion 44 is positioned below the end portion on the radially outer side. Then, with the inclination of the holding portion 44, the first stacking table is also tilted so that the first side 31a of the first stacking table is positioned below the second side 31b. At this time, since the depressions 39a and 39b of the first stacking base are respectively fitted into the protrusions 44b and 44c of the holding portion 44, the first stacking base is inclined without slipping the holding portion 44. In step S7, the elevating mechanism 45 may raise the holding unit 44 for a later process (step).

  Next, the stacked body E is formed on the inclined first stacking table (step S8). In step S8, the laminated body E is formed by supplying the positive electrode 11 with a separator and the negative electrode 9 alternately from the electrode supply mechanism 70 to the inclined 1st lamination | stacking stand. The supply method of the positive electrode 11 with a separator and the negative electrode 9 with respect to a 1st lamination | stacking stand is the method mentioned above. In addition, as above-mentioned, in the 1st lamination | stacking stand, the space | interval along the extension direction of the 1st edge | side 31a of the 1st side wall 34 and the 2nd side wall 35 becomes more than the length in the longitudinal direction of the positive electrode 11 with a separator. The second portion 34b is provided with a tapered portion 34c, and the second portion 35b is provided with a tapered portion 35c. For this reason, each of the positive electrode 11 with a separator and the negative electrode 9 falling on the first stacking base is first received by the wide portions of the tapered portions 34c and 35c. And each of the positive electrode 11 with a separator and the negative electrode 9 is guided by the taper parts 34c and 35c when sliding on the main surface 31 toward the 1st edge | side 31a side. This makes it possible to align the positions of the positive electrode 11 with separator and the negative electrode 9 in the longitudinal direction. Further, the positioning wall 33 makes it possible to align the positions of the positive electrode 11 with separator and the negative electrode 9 in the short direction.

  In step S8, the elevating mechanism 45 adjusts the position of the first stacking base in the direction γ according to the total number of separator-attached positive electrodes 11 and negative electrodes 9 stacked on the first stacking base. Specifically, the elevating mechanism 45 includes the drive shaft 48a and the drive shaft so as to lower the first stacked base as the total number of the positive electrode 11 with separator and the negative electrode 9 stacked on the first stacked base increases. Shrink 50a. The contraction degrees of the drive shaft 48a and the drive shaft 50a are set to be the same so that the inclination angle of the first stacking base does not change. It should be noted that during the manufacture of the first laminate, the timing for contracting the drive shaft 48a and the drive shaft 50a by the elevating mechanism 45 can be arbitrarily determined. For example, the elevating mechanism 45 may contract the drive shaft 48a and the drive shaft 50a every time the total number of the positive electrode 11 with separator and the negative electrode 9 increases by one, or every time the total number becomes a predetermined multiple (for example, The drive shaft 48a and the drive shaft 50a may be contracted every 3 to 5 sheets. The elevating mechanism 45 may contract the drive shaft 48a and the drive shaft 50a stepwise, or may continuously contract the drive shaft 48a and the drive shaft 50a at a predetermined speed.

  Next, the rotating plate 42 of the first turntable 40 is rotated (step S9). In step S9, as in steps S1 and S6, the drive unit 41b rotates the rotating plate 42 by 90 ° clockwise. Accordingly, the receiving unit 43A that holds the first stacking table that houses the stacked body E is disposed at a position that is 180 ° different from the position that is disposed in step S1.

  Next, the laminated body E accommodated in the first laminated table is inspected by the first inspection device 81 (step S10). In step S10, the laminate E is inspected by the method described above.

  Next, the rotating plate 42 of the first turntable 40 is rotated (step S11). In step S11, as in steps S1, S6, and S9, the drive unit 41b rotates the rotating plate 42 by 90 degrees clockwise. Accordingly, the receiving portion 43A that holds the first stacking table that accommodates the inspected stacked body E is disposed at a position that is 180 ° different from the position that is disposed in step S6.

  Next, the holding part 44 of the receiving part 43A is raised by the lifting mechanism 45 (step S12). In step S <b> 12, the holding unit 44 of the receiving unit 43 </ b> A is lifted so that the inclined state is released by the elevating mechanism 45 and is positioned above the second transport unit 22. In addition, the test | inspection performed by step S10 may be performed with respect to the laminated body E accommodated in the 1st lamination | stacking stand in step S12.

  Next, returning to step S1, the rotating plate 42 of the first turntable 40 is rotated. As a result, the receiving unit 43A that holds the first stacking table that houses the inspected stacked body E returns to the position where it is arranged in step S1. Therefore, by repeating the above-described steps S1 to S12, the laminated body E is accommodated in the first laminated base received by the receiving unit 43A, the laminated state of the laminated body E is inspected, and then the inspected laminated body E is checked. Can be transported by placing the first stacking table for housing the second stacking unit 22 on the second transport unit 22. The first stacking table is received from the first transport unit 21 by the receiving unit 43A, rotated 360 ° in plan view in accordance with the operation of the receiving unit 43A, and then placed on the second transport unit 22. Therefore, the positioning wall 33, the first side wall 34, and the second side wall 35 are transported by the second transport unit 22 with respect to the main surface 31 of the first stacking table transported by the first transport unit 21. The direction in which the positioning wall 33, the first side wall 34, and the second side wall 35 are positioned with respect to the main surface 31 of the first stacked base is the same as each other. For example, all the second side walls 35 of the first stacking table transported by the second transport unit 22 are located downstream in the transport direction of the first transport unit 21 (upstream in the transport direction of the second transport unit 22). is doing.

  Similarly to the receiving unit 43A, the receiving units 43B to 43D of the first turntable 40 receive an empty first stacking table from the first transport unit 21, and the second stacking unit E is accommodated in the second stacking table. Place on the transport unit 22. Specifically, the receiving unit 43D provided adjacent to the receiving unit 43A in the rotation direction of the rotating plate 42 passes through another process similar to Steps S2 to S5 between Steps S7 and S8, and forms another empty stacking table. Receive. In addition, another stacked body is formed on the stacking table received by the receiving unit 43D through steps similar to steps S7 and S8 during step S10, and through steps similar to step S10 during step S12. The laminate is inspected. Similarly, the receiving portion 43C provided adjacent to the receiving portion 43D on the opposite side to the receiving portion 43A in the rotation direction of the rotating plate 42 undergoes the same processes as steps S2 to S5 during step S10, and is separated. Upon receiving an empty stacking table, another stack is formed on the stacking table received by the receiving unit 43C through steps S7 and S8 during step S12, and steps between steps S2 and S5. The laminate is inspected through the same steps as S10. In addition, the receiving unit 43B provided adjacent to the receiving unit 43C on the opposite side to the receiving unit 43D in the rotation direction of the rotating plate 42 undergoes the same steps as in Steps S2 to S5 during Step S12. In the stacking table received by the receiving unit 43C, another stack is formed through steps similar to steps S7 and S8 between steps S2 and S5, and between steps S7 and S8. The laminate is inspected through the same process as step S10.

  In addition, the required time of step S1, step S6, step S9, and step S11 is set the same. Similarly, the required times of steps S2 to S5, steps S7 and S8, step S10, and step S12 are set to be the same. The time required for Steps S2 to S5, Steps S7 and S8, Step S10, and Step S12 is set together with the step that requires the most time. For example, when the required time of steps S7 and S8 is about 30 seconds that is the longest and the required time of step S12 is about 10 seconds that is the shortest, in step S12, the holding unit 44 held by the receiving unit 43A After the tilted state is released and it is lifted so as to be positioned higher than the second transport unit 22, the receiving unit 43A continues until the stacked body E is formed on the first stacking table held by the receiving unit 43C. Waiting.

  Next, with reference to FIG. 10, the second turntable 60 receives the second stacking table from the transport mechanism 20, and the electrodes until the second stacking table on which the stacked body E is formed are unloaded using the transport mechanism 20. The operation of the stacking apparatus 100 will be described. Below, in the operation | movement of the 2nd turntable 60, it abbreviate | omits about the operation | movement similar to the 1st turntable 40, and demonstrates a different part especially. Hereinafter, the stacking table 30 in which the stacked body E is accommodated is held by the receiving unit 63A in the second turntable 60, and the stacking table 30 held by the receiving unit 63A is to be carried out to the transport mechanism 20. The operation of the electrode stacking apparatus 100 will be described in order from the point of time.

  First, the rotating plate 62 of the second turntable 60 is rotated (step S21). In step S21, the drive unit 61b rotates the rotary plate 62 by 90 ° counterclockwise. Accordingly, one of the receiving units 63A to 63D (hereinafter, referred to as a receiving unit 63A) is arranged so as to overlap the transport mechanism 20. More specifically, the receiving unit 63A that receives the stacking table 30 in which the stacked body E is accommodated is in a space between the transporters 25A and 25B in the direction α (a space between the transporters 23A and 23B). Arranged to overlap. Further, the holding unit 64 of the receiving unit 63A is located above the second transport unit 22 in the same manner as the holding unit 44 in step S1.

  Next, the holding unit 64 of the receiving unit 63A is lowered by the elevating mechanism 65 (step S22), and the holding unit 64 is placed until the stacking table 30 held by the holding unit 64 is placed on the transporters 25A and 25B. Is lowered. At this time, the stacking table 30 has the protrusions 64b and 64c provided on the holding portion 64 fitted into the recesses 39a and 39b, respectively, and the damming portion of the stopper 26A shown in FIG. Therefore, the transport of the stacking table 30 by the transporters 25A and 25B is hindered. Further, the holding unit 64 of the receiving unit 63A is further lowered by the lifting mechanism 65, and the stacking table 30 is transported by the second transport unit 22 (step S23).

  Next, the empty stacking table 30 is transported by the first transport unit 21 (step S24). In step S24, the stopper of the second stacking table by the stopper 24A shown in FIG. 4 is released, and the second stacking table is transported toward the transport machine 23B. Then, the second stacking table is blocked by the stopper 24B shown in FIG. 4 so that a part of the second stacking table including the recesses 39a and 39b overlaps the space between the transfer machines 23A and 23B in the direction α. .

  Next, the holding part 64 is raised by the elevating mechanism 65 (step S25). In step S25, the receiving unit 63A receives the second stacking table. Since the holding part 64 has protrusions 64b and 64c similar to the protrusions 44b and 44c of the holding part 44, the second stacked base is stably held by the holding part 64.

  Next, the rotating plate 62 of the second turntable 60 is rotated (step S26). In step S26, as in step S21, the drive unit 61b rotates the rotating plate 62 by 90 ° counterclockwise. As a result, the receiving unit 63A and the second stacking table are arranged in positions that do not overlap the transport mechanism 20 without contacting the first transport unit 21 and the second transport unit 22. As described above, the first turntable 40 and the second turntable 60 are provided on the opposite sides of the transport mechanism 20 in the direction β. For this reason, when the rotating plate 62 of the 2nd turntable 60 rotates counterclockwise unlike the turntable 42 of the 1st turntable 40, the 1st edge | side 31a of a 2nd lamination | stacking stand is a rotation board rather than the 2nd edge | side 31b. 62 is located radially outside. That is, the direction in which the positioning wall 33, the first side wall 34, and the second side wall 35 are positioned with respect to the main surface 31 in the first stacking table held by the receiving unit 43A rotated by 90 ° in step S6. The direction in which the positioning wall 33, the first side wall 34, and the second side wall 35 are positioned with respect to the main surface 31 of the second stacking table held by the receiving portion 63A rotated by 90 ° in step S26 is mutually It will be the opposite. For this reason, the first side 31a of the second stacking table held by the holding unit 64 is positioned on the outer side in the radial direction of the rotating plate 42 than the second side 31b. In other words, the second stacking table in step S26 is opposite to the first stacking table in steps S6 to S8.

  Next, the holding unit 64 of the receiving unit 63A and the second stacking table held by the holding unit 64 are inclined by the lifting mechanism 65 (step S27). In step S27, for example, as shown in FIG. 7C, the holding portion 64 is arranged such that the radially outer end of the rotating plate 62 of the holding portion 64 is positioned lower than the end on the radial center side. Will be inclined. That is, the holding part 64 of the receiving part 63A is inclined to the opposite side to the holding part 44 of the first turntable 40 in step S7. By tilting the holding portion 64 in this manner, the second stacking table is tilted so that the first side 31a of the second stacking table is positioned below the second side 31b.

  Next, the stacked body E is formed on the inclined second stacking table (step S28). In step S28, similarly to the receiving part 43A of the first turntable 40, the lifting mechanism 65 is provided on the second stacking table according to the total number of the positive electrode 11 with separator and the negative electrode 9 stacked on the second stacking table. Adjust the position in the direction γ. The adjustment method using the lifting mechanism 65 is the same as the adjustment method using the lifting mechanism 45 described above.

  Next, the rotating plate 62 of the second turntable 60 is rotated (step S29). In step S29, as in steps S21 and S26, the drive unit 61b rotates the rotating plate 62 by 90 ° counterclockwise. Accordingly, the receiving unit 63A that holds the second stacking table that houses the stacked body E is disposed at a position that is 180 ° different from the position that is disposed in step S21.

  Next, the laminated body E accommodated in the second laminated table is inspected by the second inspection device 82 (step S30). In step S30, the laminate E is inspected by the method described above.

  Next, the rotating plate 62 of the second turntable 60 is rotated (step S31). In step S31, as in steps S21, S26, and S29, the drive unit 61b rotates the rotating plate 62 by 90 ° counterclockwise. Accordingly, the receiving unit 63A that holds the second stacking table that houses the inspected stacked body E is disposed at a position that is 180 ° different from the position that is disposed in step S26.

  Next, the holding part 64 of the receiving part 63A is raised by the elevating mechanism (step S32). In step S <b> 32, as in step S <b> 12, the holding unit 64 of the receiving unit 63 </ b> A is lifted so that the inclined state is released by the elevating mechanism 65 and positioned above the second transport unit 22.

  Next, returning to step S21, the rotating plate 62 of the second turntable 60 is rotated. As a result, the receiving unit 63A that holds the second stacking table that houses the inspected stacked body E returns to the position where it was placed in step S21. Therefore, by repeating the above-described steps S21 to S32, the laminated body E is accommodated in the second laminated base received by the receiving unit 63A, the laminated state of the laminated body E is inspected, and then the inspected laminated body E is checked. Can be transported by placing the second stacking table that accommodates the second stacking unit on the second transport unit 22. In addition, the 2nd lamination stand is the positioning wall 33, the 1st side wall 34, and the 2nd side wall 35 with respect to the main surface 31 in the 2nd lamination stand conveyed by the 1st conveyance part 21 similarly to the 1st lamination stand. The direction in which the positioning wall 33, the first side wall 34, and the second side wall 35 are positioned with respect to the main surface 31 of the second stacking table transported by the second transport unit 22 is the first transport. It is mutually the same along the conveyance direction of the part 21 (or the conveyance direction of the 2nd conveyance part 22).

  Similarly to the receiving unit 63A, the receiving units 63B to 63D of the second turntable 60 receive the empty second stacking table from the first transport unit 21, and the second stacking table in which the stack E is accommodated is the second. Place on the transport unit 22. In other words, the receiving unit 63D provided adjacent to the receiving unit 63A in the rotation direction of the rotating plate 62 receives another empty stacking table through steps S22 to S25 between steps S27 and S28. Further, another stacked body is formed on the stacking table received by the receiving unit 63D through steps S27 and S28 during step S30, and through steps similar to step S30 during step S32. The laminate is inspected. The same applies to the receiving units 63B and 63C.

  The time required for step S21, step S26, step S29, and step S31 is set to be the same as the time required for step S1, step S6, step S9, and step S11. Similarly, the time required for steps S22 to S25, steps S27 and S28, step S30, and step S32 is as follows. The time required for steps S2 to S5, steps S7, S8, step S10, and step S12 is as follows. They are set the same. Here, step S21 is performed while the rotating plate 42 is not rotating (that is, during steps other than steps S1, S6, S9, and S11). In the present embodiment, steps S21 to S25 are performed during step S8. By shifting the start timing of step S1 and the start timing of step S21 in this way, the transport timing of the stacking table 30 (the first stacking table and the second stacking table) by the first transport unit 21 can be shortened.

  According to the electrode stacking apparatus 100 according to the present embodiment described above, the first stacking table and the second stacking table are positioned at the positioning wall 33, the first side wall 34, and the second side wall 35 with respect to the main surface 31. It arrange | positions at the 1st conveyance part 21 and is conveyed so that the direction to perform may become the same. In the present embodiment, the second side walls 35 of all the stacked bases 30 that are arranged and transported in the first transport unit 21 are located on the downstream side in the transport direction of the first transport unit 21. The first stacking table transferred by the first transfer unit 21 is received and held by the receiving unit 43A of the first turntable 40, and the second stacking table transferred by the first transfer unit 21 is the second stacking table. It is received and held by the receiving unit 63A of the turntable 60. Here, the rotating plate 42 and the rotating plate 62 rotate in opposite directions. Therefore, the direction in which the second side wall 35 is positioned with respect to the main surface 31 of the first stacking table when the rotating plate 42 is rotated 90 ° after the receiving unit 43A receives the first stacking table, and the second stacking The direction in which the second side wall 35 is positioned with respect to the main surface 31 of the second stacking table when the rotating plate 62 rotates 90 ° after the receiving unit 63A receives the table is opposite to each other. Thereby, even if it is a case where a pair of positive electrode 8 which the positive electrode tabs 8b protrude toward the mutually opposite direction is supplied by the 1st electrode supply part 71, without aligning direction of the positive electrode tab 8b, a pair One of the positive electrodes with separator 11 can be dropped and stacked on the first stacking table held by the receiving portion 43A, and the other of the pair of positive electrodes with separator 11 can be dropped on the second stacking table held by the receiving portion 63A. Can be stacked. The same applies to the pair of negative electrodes 9 supplied by the second electrode supply unit 72. Therefore, according to the electrode stacking apparatus 100, the stacked body E can be efficiently manufactured without aligning the directions of the pair of separator-attached positive electrode 11 and negative electrode 9 formed by double striping or the like.

  The receiving unit 43A includes a plate-like holding unit 44 that holds the first stacking table, and an elevating mechanism 45 that can move the holding unit 44 in the vertical direction. The receiving unit 63A includes the second stacking table. A plate-like holding portion 64 and an elevating mechanism 65 that can elevate the holding portion 64 in the vertical direction. The elevating mechanism 45 changes the position of the holding portion 44 in the direction γ and holds the holding portion. 44, the lifting mechanism 65 changes the position of the holding part 64 in the vertical direction and adjusts the inclination angle of the holding part 64. By controlling the elevating mechanism 45, it is possible to prevent the holding unit 44 or the first stacking table held by the holding unit 44 from contacting the transport mechanism 20 or the like. Similarly, by controlling the lifting mechanism 65, it is possible to prevent the holding unit 64 or the second stacking table held by the holding unit 64 from coming into contact with the transport mechanism 20 or the like.

  The elevating mechanism 45 includes a first elevating unit 46 and a second elevating unit 47 that are separated from each other and controlled independently from each other, and the elevating mechanism 65 is separated from each other and is controlled independently from each other. Part 66 and second elevating part 67. Thereby, the inclination angles of the holding portion 44 and the holding portion 64 can be adjusted with a simple configuration.

  The first elevating part 46 has a cylinder part 48 that can be expanded and contracted in the vertical direction and a tip part 49 that is attached to the tip of the cylinder part 48, and the second elevating part 47 is a cylinder that can be expanded and contracted in the vertical direction. Part 50 and a tip part 51 attached to the tip of the cylinder part 50, the tip part 49 of the first lifting part 46 is fixed to the holding part 44, and the tip part 51 of the second lifting part 47 is , Is in contact with the holding portion 44. Thereby, since the position shift of the holding | maintenance part 44 with respect to the 1st raising / lowering part 46 can be prevented, the position shift of the 1st lamination | stacking stand hold | maintained at the said holding | maintenance part 44 is suppressed. Further, the first elevating unit 66 and the second elevating unit 67 of the receiving unit 63A may also have the above configuration. In this case, since the positional deviation of the holding part 64 with respect to the first lifting / lowering part 66 can be prevented, the positional deviation of the second stacking table held by the holding part 64 is suppressed.

  The lifting mechanism 45 adjusts the position of the first stacking base in the direction γ according to the number of the positive electrode 11 with separator and the negative electrode 9 stacked on the first stacking base, and the lifting mechanism 65 includes the second stacking base. The position in the direction γ of the second stacked table is adjusted according to the number of the positive electrode 11 with separator and the negative electrode 9 stacked on the table. Thereby, even if the laminated height of the laminated body E increases, the falling positive electrode 11 with a separator and the negative electrode 9 are prevented from landing near the upper end of the uppermost layer of the laminated body E. Therefore, it is possible to suppress the occurrence of a defect (for example, damage to the positive electrode tab 8b of the separator-attached positive electrode 11 and the negative electrode tab 9b of the negative electrode 9) that accompanies an increase in the stacked height of the stacked body E.

  Moreover, the raising / lowering mechanism 45 inclines the holding | maintenance part 44 so that the 1st edge | side 31a of a 1st lamination | stacking base may be located below rather than the 2nd edge | side 31b facing the said 1st edge | side 31a. As a result, the separator-attached positive electrode 11 and negative electrode 9 dropped toward the first stacking table slide on the inclined main surface 31 and come into contact with the positioning wall 33. Thereby, the position of the lower end part of the positive electrode 11 with a separator and the negative electrode 9 in a 1st lamination | stacking stand can be arrange | equalized.

  The stacking base 30 has recesses 39a and 39b that engage with the holding portion 44, and the holding portion 44 has protrusions 44b and 44c that fit into the recesses 39a and 39b, respectively. Thereby, the stacking table 30 is stably held by the holding unit 44.

  The transport mechanism 20 includes a first transport unit 21 that transports the empty first stacking table and the second stacking table, and a first stack that is provided above the first transport unit 21 and in which the stacked body E is accommodated. And a second transport unit 22 for transporting the table and the second stacking table. The first transport unit 21 and the second transport unit 22 extend along the direction α and overlap each other in plan view. The receiving unit 43A receives an empty first stacking table from the first transport unit 21 and places the first stacking table containing the stack E on the second transport unit 22, and the receiving unit 63A The empty second stacking table is received from the first transfer unit 21, and the second stacking table in which the stacked body E is accommodated is placed on the second transfer unit 22. In this case, for example, the first stacking table is received by the receiving unit 43A from the first transport unit 21 and is placed on the second transport unit 22 after the rotating plate 42 has rotated 360 °. Similarly, the second stacking table is received by the receiving unit 63A from the first transport unit 21, for example, and is placed on the second transport unit 22 after the rotating plate 62 has rotated 360 °. Here, as described above, the first stacking table and the second stacking table are arranged and transferred to the first transfer unit 21 so that the direction in which the positioning wall 33 is positioned with respect to the main surface 31 is the same. For this reason, the direction in which the positioning wall 33 is positioned with respect to the main surface 31 of the first stacking table and the second stacking table placed on the second transfer unit 22 is arranged in the first transfer unit 21. Be the same. Therefore, a mechanism for aligning the directions of the first stacking table and the second stacking table in which the stacked body E is accommodated can be omitted. In addition, since the second transport unit 22 overlaps the first transport unit 21 in plan view, the occupation area of the transport mechanism 20 in plan view can be reduced.

  The first turntable 40 includes receiving units 43B to 43D in addition to the receiving unit 43A, and the second turntable 60 includes receiving units 63B to 63D in addition to the receiving unit 63A. Thereby, since each of the 1st turntable 40 and the 2nd turntable 60 can hold | maintain the some lamination stand 30, the laminated body E can be manufactured more efficiently.

  The electrode stacking apparatus 100 includes a first inspection device 81 that inspects the state of the stacked body E in the first stacking table held by the receiving unit 43A, and a second stack that is held by the receiving unit 63A. And a second inspection device 82 that inspects the state of the stacked body E in the table. Thereby, the position shift etc. of the laminated body E accommodated in the 1st laminated base and the laminated body E accommodated in the 2nd laminated base can be test | inspected at an early stage.

  The electrode supply mechanism 70 includes a first electrode supply unit 71 that supplies a pair of separator-attached positive electrodes 11 and a second electrode supply unit 72 that supplies a pair of negative electrodes 9. Thereby, since the positive electrode 11 with a separator and the negative electrode 9 are supplied to the corresponding stacking table 30 by separate supply units, the stacking table corresponding to both the positive electrode 11 with a separator and the negative electrode 9 using a single supply unit. The interval between the supply timing of the positive electrode 11 with a separator and the supply timing of the negative electrode 9 can be shortened compared to the case of supplying to the electrode 30, and the electrode stacking speed can be improved.

  The formation positions of the positive electrode tabs 8b in the pair of positive electrodes 8 formed by the first electrode supply unit 71 and the formation positions of the negative electrode tabs 9b in the pair of negative electrodes 9 formed by the second electrode supply unit 72 are as follows. As shown in FIG. 8, it is preferable that they are symmetrical with each other in plan view. In this case, the positions of the positive electrode tab 8b and the negative electrode tab 9b with respect to the stack base 30 of the stack E formed on the first stack base, the positive tab 8b with respect to the stack base 30 of the stack E formed on the second stack base, and The position of the negative electrode tab 9b can be matched.

  The electrode stacking apparatus according to the present invention is not limited to the above embodiment. FIG. 11A is an enlarged side view of a part of a back electrode laminating apparatus according to a modification. FIG.11 (b) is the XIb-XIb sectional view taken on the line of Fig.11 (a). As shown in FIGS. 11A and 11B, for example, between step S25 and before step S26, the elevating mechanism 65 raises the holding portion 64 that holds the stacking base 30 (second stacking base). Then, the other stacking table 30 (first stacking table) may be transported toward the transporting machine 23B so as to pass under the holding unit 64. In this case, the conveyance timing of the stacking table 30 by the first conveyance unit 21 to the first rotation table 40 and the second rotation table 60 can be further optimized.

  Moreover, in the said embodiment, in the lamination | stacking stand, the positive electrode with a separator and the negative electrode which are the states where the positive electrode was wrapped in the bag-shaped separator were laminated | stacked alternately, However, It is not restricted to this. For example, in the stacking table, the negative electrode with a separator in which the negative electrode is wrapped in a bag-shaped separator and the positive electrode may be alternately stacked. At this time, a positive electrode is conveyed by a 1st electrode supply part, and a negative electrode with a separator is conveyed by a 2nd electrode supply part.

  Moreover, in the said embodiment, a 2nd conveyance part does not necessarily overlap with a 1st conveyance part by planar view.

  Moreover, in the said embodiment, when a laminated body is manufactured by a lamination stand, the said lamination stand does not necessarily need to incline.

  Moreover, in the said embodiment, although both the 1st notch part and the 2nd notch part are provided in the lamination | stacking stand, it is not restricted to this. For example, one of the first cutout part and the second cutout part may be provided on the stacking table.

  Moreover, in the said embodiment, the 1st turntable may not be arrange | positioned with respect to the conveyance mechanism in the opposite side to the side in which the 2nd turntable is provided in direction (beta). In this case, the first turntable may be provided on the side where the second turntable is provided in the direction β with respect to the transport mechanism. Further, the drive shaft of the first turntable always rotates clockwise, and the drive shaft of the second turntable always rotates counterclockwise. However, the present invention is not limited to this. The first turntable and the second turntable need only rotate in opposite directions (reverse directions) after receiving the corresponding stacking table.

  In the above embodiment, the electrode stacking apparatus does not necessarily include the first inspection apparatus and the second inspection apparatus. In addition, the number of receiving units in the first turntable and the second turntable is not limited, and may be one, two, three, or five or more. Moreover, each of the 1st turntable and the 2nd turntable does not necessarily need to be equipped with a rotating plate. In other words, each of the 1st turntable and the 2nd turntable should just be provided with the rotating shaft and the receiving part at least.

  In addition, when the number of receiving units in the first rotating table and the second rotating table is one, the driving shaft of the first rotating table is configured such that after the first receiving unit receives the first stacking table from the transport mechanism, While rotating counterclockwise, the drive shaft of the second rotating table may rotate clockwise after the second receiving unit receives the second stacking table from the transport mechanism. In this case, each of the first receiving unit and the second receiving unit may perform a swing motion in conjunction with the corresponding drive shaft.

  Moreover, in the said embodiment, although the positive electrode punching part of a 1st electrode supply part forms a pair of positive electrode by two strips, it is not restricted to this. For example, the positive electrode punching portion may simultaneously form a plurality of pairs of positive electrodes by four-threading or the like. The same applies to the negative electrode punching part of the second electrode supply part.

  Moreover, in the said embodiment, although the electrical storage apparatus 1 is a lithium ion secondary battery, this invention is not restricted especially to a lithium ion secondary battery, For example, other secondary batteries, such as a nickel metal hydride battery, an electric double layer The present invention can also be applied to the stacking of electrodes in a power storage device such as a capacitor or a lithium ion capacitor.

  DESCRIPTION OF SYMBOLS 1 ... Power storage device, 8 ... Positive electrode, 8a ... Positive electrode main-body part, 8b ... Positive electrode tab, 9 ... Negative electrode, 9a ... Negative electrode main-body part, 9b ... Negative electrode tab, 10 ... Separator, 11 ... Positive electrode with a separator, 20 ... Conveyance mechanism, DESCRIPTION OF SYMBOLS 21 ... 1st conveyance part, 22 ... 2nd conveyance part, 30 ... Laminate stand, 31 ... Main surface, 31a ... 1st edge, 31b ... 2nd edge, 31c ... 3rd edge, 31d ... 4th edge, 32 ... Body part 33 ... Positioning wall 36 ... Bottom part 37 ... First notch part 38 ... Second notch part 39a, 39b ... Indentation 40 ... First turntable 42, 62 ... Rotating plate 43A-43D ... Receiving part 44 ... holding part 44b 44c ... projection 45 ... lifting mechanism 46 ... first lifting part 47 ... second lifting part 48, 50 ... cylinder part 49, 51 ... tip part 60 ... first Two-turn table, 63A to 63D ... receiving unit, 70 ... electrode supply mechanism, 71 ... first electrode supply unit 72 ... second electrode supply unit, 81 ... first inspection device, 82 ... second inspection apparatus, 100 ... electrode laminate unit, E ... laminate.

Claims (13)

An electrode laminating apparatus for producing a laminate by laminating a main body portion provided with an active material and a sheet-like electrode having a tab protruding from the main body portion,
An electrode supply mechanism for supplying a pair of the electrodes arranged such that the tabs protrude in opposite directions;
A first stacking table and a second stacking table each having a main surface on which the electrodes are stacked, and a positioning wall for positioning the supplied electrode while standing along the first side of the main surface;
A transport mechanism for transporting the first stacking table and the second stacking table;
A first rotating unit that rotates clockwise in plan view, and a first rotating table that is attached to the first rotating unit and has a first receiving unit that receives the first stacking table from the transport mechanism;
A second rotating unit that rotates counterclockwise in plan view, and a second rotating table that is attached to the second rotating unit and has a second receiving unit that receives the second stacking table from the transport mechanism; Prepared,
The first stacking table and the second stacking table are arranged in the transport mechanism so that the direction in which the positioning wall is positioned with respect to the main surface is the same.
The electrode supply mechanism is configured such that one of the pair of electrodes falls on the first stacking table held by the first receiving unit, and the other of the pair of electrodes is held by the second receiving unit. Supplying a pair of said electrodes so as to fall on two stacking stands,
Electrode stacking device. The first receiving unit includes a first holding unit that holds the first stacking base, and a first elevating mechanism that can move the first holding unit up and down in an up and down direction,
The second receiving unit includes a second holding unit that holds the second stacking base, and a second lifting mechanism that can move the second holding unit up and down in an up-and-down direction.
The first elevating mechanism changes the position of the first holding part in the vertical direction and adjusts the inclination angle of the first holding part,
2. The electrode stacking apparatus according to claim 1, wherein the second elevating mechanism changes a position of the second holding portion in the vertical direction and adjusts an inclination angle of the second holding portion.   3. The electrode stacking apparatus according to claim 2, wherein each of the first elevating mechanism and the second elevating mechanism includes a first elevating unit and a second elevating unit that are separated from each other and controlled independently of each other. Each of the first elevating part and the second elevating part has a cylinder part that can be expanded and contracted in the vertical direction, and a tip part that is attached to the tip of the cylinder part,
The tip end portion of the first elevating unit included in the first elevating mechanism is fixed to the first holding unit,
4. The electrode stacking apparatus according to claim 3, wherein the tip end portion of the second elevating unit included in the first elevating mechanism is in contact with the first holding unit. The first elevating mechanism adjusts the position in the vertical direction of the first stacking table according to the number of the electrodes stacked on the first stacking table,
The said 2nd raising / lowering mechanism adjusts the position in the up-down direction of the said 2nd lamination | stacking stand according to the number of the said electrodes laminated | stacked on the said 2nd lamination | stacking stand. The electrode stacking apparatus described.   The said 1st raising / lowering mechanism inclines the said 1st holding | maintenance part so that the said 1st edge | side of the said 1st lamination | stacking stand may be located below rather than the edge | side facing the said 1st edge | side. The electrode lamination apparatus as described in any one. The first stacking table has a recess that engages with the first holding portion,
The electrode stacking apparatus according to claim 2, wherein the first holding part has a protrusion that fits into the recess. The transport mechanism includes a first transport unit that transports the empty first stacking table and the second stacking table, and the first stack that is provided above the first transport unit and that houses the stacked body. And a second transport unit that transports the base and the second stacked base,
The first transport unit and the second transport unit extend along one direction and overlap each other in plan view,
The first receiving unit receives the empty first stacking table from the first transfer unit, and places the first stacking unit in which the stacked body is accommodated on the second transfer unit,
The second receiving unit receives the empty second stacking table from the first transport unit, and places the second stacking table in which the stack is accommodated on the second transport unit. The electrode lamination apparatus as described in any one of 1-7.   The electrode stacking apparatus according to claim 1, wherein the first turntable has a plurality of the first receiving units, and the second turntable has a plurality of the second receiving units. A first inspection device for inspecting a state of the stacked body in the first stacking table held by the first receiving unit;
The electrode according to any one of claims 1 to 9, further comprising: a second inspection device that inspects a state of the stacked body in the second stacked base held by the second receiving unit. Laminating equipment.   The said electrode supply mechanism has a 1st electrode supply part which supplies a pair of positive electrode which is a pair of said electrodes, and a 2nd electrode supply part which supplies a pair of negative electrode which is a pair of said electrodes. The electrode lamination apparatus according to any one of 10. An electrode laminating apparatus for producing a laminate by laminating a main body portion provided with an active material and a sheet-like electrode having a tab protruding from the main body portion,
An electrode supply unit that has a pair of conveyors extending in parallel and supplies the pair of electrodes arranged so that the tabs protrude in opposite directions to each other by the pair of conveyors;
A transport mechanism that forms a straight transport path, and the first stacking table and the second stacking table are placed in the same direction;
A first rotating shaft arranged in a vertical direction, and a first receiving unit that is linked to the first rotating shaft and supports the first stacking base, and the first supply of one of the electrodes by one of the conveyors A first turntable for moving the first stacking table supported by the first receiving unit between a position and the transport mechanism;
A second rotating shaft arranged in a vertical direction; and a second receiving portion that interlocks with the second rotating shaft and supports the second stacking base, and the second supply of the other electrode by the other conveyor A second turntable for moving the second stacking table supported by the second receiving unit between a position and the transport mechanism;
The first rotating shaft rotates in a first direction after receiving the first stacking table from the transport mechanism,
The second rotating shaft rotates in a second direction opposite to the first direction after receiving the second stacking table from the transport mechanism.
Electrode stacking device.   The electrode stacking apparatus according to claim 12, wherein the first stacking table located at the first supply position and the second stacking table positioned at the second supply position are opposite to each other.

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