JP6699090B2 - Electrode stacking device - Google Patents

Description

  The present invention relates to an electrode stacking device.

  As described in Patent Document 1, there is known a device for manufacturing a laminated secondary battery in which sheet electrodes are laminated. This device includes a supply mechanism for supplying a sheet-like electrode, a drop moving unit disposed below the supply mechanism for dropping and moving the electrode supplied from the supply mechanism to a predetermined position, and a discharge unit of the drop moving unit. And a guide stacking unit that is disposed below the stack and guides and stacks the electrode discharged from the discharge unit to a predetermined position. The drop moving means has a sliding portion for sliding the electrode, and a lower end portion of the sliding portion forms a discharge portion.

JP2012-91372A

  Here, in order to suppress the variation of the stacked electrodes, it is preferable to reduce the distance between the discharge part and the guide stacking means. On the other hand, the electrode described in Patent Document 1 has a simple rectangular shape, but a general sheet-shaped electrode is often provided with a protrusion such as a tab on one side thereof. When such an electrode is applied to the stacking device as described in Patent Document 1, protection of the protrusion becomes a problem. For example, when the electrode is dropped and moved with the protruding portion facing downward, the protruding portion bends when the electrode collides with the guiding and laminating means and stops. Therefore, at the time of dropping and moving, the protrusion is arranged so as to be on the side opposite to the dropping direction. However, also in this case, in the above apparatus, if the distance between the discharge part and the guide laminating means is shortened, the protruding part of the electrode may be caught in the discharge part when the electrode is discharged from the discharge part.

  FIG. 10 is a side view of an electrode stacking device according to a comparative example. As shown in FIG. 10, the electrode stacking apparatus 100 according to the comparative example includes a discharging unit 110 and a guide stacking unit 120. Specifically, in FIG. 10, the electrode 200 provided with the protruding portion 200 a is discharged from the discharging portion 110 such that the protruding portion 200 a is located on the side opposite to the dropping direction of the electrode 200, and the guide laminating means 120 is provided. It shows how it falls. As shown in FIG. 10, when the distance between the discharge part 110 and the guide laminating means 120 is shortened, the lower end of the electrode 200 (the protruding part 200a is removed before the whole electrode 200 falling from the discharge part 110 is separated from the discharge part 110). A state may occur in which the end portion (on the side not provided) contacts the guide laminating means 120 or the laminated body X of the electrodes 200 formed on the guide laminating means 120). In this case, the electrode 200 decelerates, and the upper end of the electrode 200 swings, so that the protruding portion 200 a is caught by the lower end 110 a of the discharging portion 110. If the protruding portion 200a is caught by the discharge portion 110, the protruding portion 200a may be bent or damaged. In particular, when the protrusion 200a is a tab of an electrode as in this example, the protrusion 200a is easily bent because the active material layer is not formed and the rigidity is low.

  It is an object of the present invention to provide an electrode stacking device capable of suppressing deformation or damage of a projection when a sheet-shaped electrode having a projection is dropped and stacked.

  An electrode stacking device according to one aspect of the present invention is an electrode stacking device that stacks a plurality of sheet-shaped electrodes, and has a sliding part having a bottom plate part inclined with respect to the horizontal direction so that the electrodes slide downward. And a laminated portion that is disposed below the lower end portion of the bottom plate portion and that guides and stacks the electrodes that fall from the lower end portion to a predetermined position, and the lower end portion of the bottom plate portion has a plate thickness of the bottom plate portion. A notch is provided that penetrates in the direction.

  In this electrode stacking device, a plurality of electrodes are stacked by the sheet-like electrodes sliding on the bottom plate falling from the lower end of the bottom plate and being stacked at the stacking part. Here, the electrode may be provided with a protrusion such as a tab for collecting current. According to the above electrode stacking device, since the lower end portion of the bottom plate portion is provided with the notch penetrating in the plate thickness direction of the bottom plate portion, when the electrode falls from the lower end portion of the bottom plate portion, the protruding portion of the electrode is It is possible to pass through the notch. Accordingly, it is possible to prevent the protruding portion from being caught on the lower end portion of the bottom plate portion when the electrode falls. Therefore, when the sheet-shaped electrode having the protruding portion is dropped and stacked, the deformation or damage of the protruding portion can be suppressed.

  In the above electrode stacking device, two cutouts that are spaced apart from each other are provided at the lower end of the bottom plate portion, and a support portion that is continuous with the sliding surface of the bottom plate portion is provided between the two cutouts. Good.

  According to this electrode stacking apparatus, the electrode can be properly supported by the support portion provided between the two notches that are separated from each other until just before the electrode falls from the lower end portion of the bottom plate portion. As a result, it is possible to suppress the deformation (bending, etc.) of the electrodes and also suppress the variation during stacking.

  In the above electrode stacking device, the protruding portion is provided at one end of the electrode, and the notch may be provided at a position corresponding to the protruding portion in the width direction orthogonal to the tilt direction of the bottom plate portion. Good.

  According to this electrode stacking device, when the electrode that slides on the bottom plate with one end positioned above falls from the lower end of the bottom plate, the protruding part of the electrode passes through the notch. Become. This can prevent the protruding portion of the electrode from being caught by the lower end portion of the bottom plate portion when the electrode falls from the lower end portion of the bottom plate portion.

  In the above electrode stacking device, the stacking portion is disposed below the lower end portion of the bottom plate portion, is inclined with respect to the horizontal direction, and has a bottom wall portion on which the electrode is placed, and a bottom wall portion provided upright on the bottom wall portion. Has a stopper that extends in a direction orthogonal to the inclination direction of the section and stops the electrode by contacting the other end of the electrode placed on the bottom wall, and contacts the other end of the electrode. The distance from the contact surface of the stopper to the lower edge of the bottom plate portion where the notch is not provided may be smaller than the distance from the other end of the electrode to the tip of the protruding portion of the electrode.

  In this electrode stacking device, the sliding part and the stacking part are arranged by utilizing the fact that the projecting part passes through the notch when the electrode falls from the lower end part of the bottom plate part. That is, the distance from the contact surface of the stopper that comes into contact with the other end of the electrode to the lower edge of the bottom plate where the notch is not provided is the total length of the electrode (from the other end to the tip of the protrusion). The distance between the planing part and the laminated part is arranged so as to be shorter than the distance. Thus, the position where the other end of the electrode falling from the lower end of the bottom plate comes into contact with the upper surface of the bottom wall portion (or the electrode placed on the bottom wall portion) of the laminated portion is preferably the contact surface of the stopper. Can be approached to. That is, it is possible to shorten the distance that the other end portion of the electrode slides down to the contact surface of the stopper after the other end portion of the electrode comes into contact with the upper surface of the bottom wall portion (or the electrode placed on the bottom wall portion) of the laminated portion. As a result, it is possible to reduce the impact on the electrode when the electrode is stacked on the stacked portion, and it is possible to suppress the occurrence of displacement during the stacking and the damage to the electrode.

  In the above electrode stacking device, the stacking portion is disposed below the lower end portion of the bottom plate portion, is inclined with respect to the horizontal direction, and has a bottom wall portion on which the electrode is placed, and a bottom wall portion provided upright on the bottom wall portion. A pair of side wall portions that extend in the inclination direction of the portion and are separated in a direction orthogonal to the inclination direction, and the distance between the pair of side wall portions is equal to or greater than the width of the electrode, and the upper end portions of the pair of side wall portions are provided. May be provided with a tapered portion having a narrower interval so as to approach the width of the electrode as it goes downward in the tilt direction.

  In this electrode stacking apparatus, since the tapered portions are provided at the upper ends of the pair of side wall portions, the electrode falling from the lower end of the bottom plate portion is first received in the wide portion of the tapered portions. The electrode is guided by the tapered portion as it slides downward. This makes it possible to align the positions of the electrodes in the width direction (direction orthogonal to the tilt direction of the bottom wall portion).

  In the above electrode stacking device, the electrodes are provided at the first electrode where the protrusion is provided at the first position in the width direction and at the second position where the protrusion is different from the first position in the width direction. A second electrode, and the notch may be provided at a position corresponding to the first position and the second position.

  In this electrode stacking device, when the first electrode that slides on the bottom plate portion with one end positioned above falls from the lower end portion of the bottom plate portion, the first protruding portion of the first electrode is , Will pass through the notch. Further, since the notch is provided in a shape corresponding to the second projecting portion as well, the second electrode sliding on the bottom plate portion in the state where one end portion is located above is provided from the lower end portion of the bottom plate portion. When falling, the second protrusion of the second electrode will pass through the notch. This makes it possible to prevent the protrusion of each electrode from being caught on the lower end of the bottom plate of the sliding part when a plurality of electrodes having different positions of the protruding part are slid downward by one sliding part.

  In the above electrode stacking device, the electrode has a first electrode in which the first protrusion is provided at a first position in the width direction and a second electrode in which the second protrusion is different from the first position in the width direction. And a second electrode provided at the position of, and the sliding portion has a first bottom plate portion inclined with respect to the horizontal direction so as to slide the first electrode downward. A sliding part and a second sliding part provided below the first sliding part and having a second bottom plate part that is inclined with respect to the horizontal direction so as to slide the second electrode downward. Then, the lower end of the first bottom plate portion is provided with a first notch penetrating in the plate thickness direction of the first bottom plate portion at a position corresponding to the first protruding portion in the width direction, The lower end of the second bottom plate portion is provided with a second notch penetrating in the plate thickness direction of the second bottom plate portion at a position corresponding to the first protrusion and the second protrusion in the width direction. It may be.

  In this electrode stacking device, when the first electrode that slides on the first bottom plate portion with one end portion positioned above falls from the lower end portion of the first bottom plate portion, the first electrode The first protrusion will pass through the first notch. In addition, when the second electrode sliding on the second bottom plate portion with one end located above is dropped from the lower end portion of the second bottom plate portion, the second protrusion of the second electrode is generated. The part will pass through the second notch. Further, since the second notch is also provided corresponding to the first projecting portion, the first notch dropped from the lower end portion of the first bottom plate portion provided above the second bottom plate portion. The first protrusion of the electrode of can pass through the second notch. This prevents the protrusion of each electrode from being caught on the lower end of the bottom plate of each slide when sliding each of a plurality of electrodes with different positions of the protrusion down the slides in the upper and lower stages. can do.

  According to the present invention, it is possible to suppress deformation or damage of the protrusion when the sheet-like electrodes having the protrusion are dropped and stacked.

It is sectional drawing which shows an example of an internal structure of the electrical storage apparatus manufactured by applying the electrode lamination apparatus of one Embodiment of this invention. It is the II-II sectional view taken on the line in FIG. It is a figure which shows typically the whole structure of the electrode lamination apparatus of 1st Embodiment. It is a perspective view of the electrode lamination device of 1st Embodiment. It is a side view of the electrode lamination device of 1st Embodiment. It is the figure which looked at the electrode lamination device of a 1st embodiment from the lamination direction of an electrode. It is the figure which looked at the electrode lamination device of a 1st embodiment from the front. It is a figure which shows typically the whole structure of the electrode lamination apparatus of 2nd Embodiment. It is a figure which shows the modification of a notch and a protrusion wall part. It is a side view of the electrode lamination device which concerns on a comparative example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same elements will be denoted by the same reference symbols, without redundant description.

  FIG. 1 is a cross-sectional view showing an example of the internal configuration of a power storage device manufactured by applying the electrode stacking device of one embodiment of the present invention. 2 is a sectional view taken along the line II-II in FIG. As shown in FIGS. 1 and 2, the power storage device 1 is configured as a vehicle-mounted non-aqueous electrolyte secondary battery such as a lithium ion secondary battery.

  The power storage device 1 includes, for example, a hollow case 2 having a substantially rectangular parallelepiped shape, and an electrode assembly 3 housed in the case 2. The case 2 is made of metal such as aluminum. An insulating film (not shown) is provided on the inner wall surface of the case 2. A non-aqueous organic solvent-based electrolyte solution is injected into the case 2. In the electrode assembly 3, the positive electrode active material layer 15 of the positive electrode 11, the negative electrode active material layer 18 of the negative electrode 12, and the separator 13 described later are porous, and the pores thereof are impregnated with the electrolytic solution. .. On the upper surface of the case 2, the positive electrode terminal 5 and the negative electrode terminal 6 are arranged separately from each other. The positive electrode terminal 5 is fixed to the case 2 via an insulating ring 7, and the negative electrode terminal 6 is fixed to the case 2 via an insulating ring 8.

  The electrode assembly 3 is composed of a positive electrode 11, a negative electrode 12, and a bag-shaped separator 13 arranged between the positive electrode 11 and the negative electrode 12. The positive electrode 11 is housed in the separator 13, for example. With the positive electrode 11 accommodated in the separator 13, the positive electrode 11 and the negative electrode 12 are alternately stacked with the separator 13 interposed therebetween. That is, the electrode assembly 3 has the positive electrode 10 with a separator configured by housing the positive electrode 11 in the bag-shaped separator 13.

  From the viewpoint of improving the space efficiency and increasing the volume of the electrode assembly 3 occupying the space in the case 2, as an example, the electrode assembly 3 is provided at the lower ends of the positive electrode 10 with a separator and the negative electrode 12 (the positive electrode terminal 5). And the end opposite to the negative electrode terminal 6) can be housed in the case 2 so that the bottom surface of the case 2 contacts. An insulating member (not shown) is arranged on the inner surface of the case 2. Therefore, in this case, the lower ends of the separator-attached positive electrode 10 and the negative electrode 12 contact the bottom surface of the case 2 via the insulating member. However, a minute gap may be formed between the lower ends of the separator-attached positive electrode 10 and the negative electrode 12 and the bottom surface of the case 2 in addition to the space occupied by the insulating member.

  The positive electrode 11 has 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 a porous layer including a positive electrode active material and a binder. In other words, the positive electrode active material is carried on both surfaces of the substantially rectangular metal foil body 14a. Examples of the positive electrode active material include complex oxides, metallic lithium, sulfur and the like. The composite oxide contains, for example, at least one of manganese, nickel, cobalt, and aluminum, and lithium. A tab (first protrusion) 14b is formed on the upper edge (one end) of the body 14a so as to correspond to the position of the positive electrode terminal 5. The tab 14b does not carry the positive electrode active material. The tab 14b extends upward from the upper edge portion of the main body portion 14a and is connected to the positive electrode terminal 5 via the conductive member 16.

  The negative electrode 12 has a metal foil 17 made of, for example, a copper foil, and a negative electrode active material layer 18 formed on both surfaces of the metal foil 17. The negative electrode active material layer 18 is a porous layer including a negative electrode active material and a binder. In other words, the negative electrode active material is carried on both surfaces of the substantially rectangular metal foil main body 17a. Examples of the negative electrode active material include graphite, highly oriented graphite, carbon such as mesocarbon microbeads, hard carbon and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5≦x≦1.5). ) And other metal oxides, boron-added carbon, and the like. A tab (second protrusion) 17b is formed at the upper edge (one end) of the main body 17a so as to correspond to the position of the negative electrode terminal 6. The tab 17b does not carry the negative electrode active material. The tab 17b extends upward from the upper edge of the main body 17a and is connected to the negative electrode terminal 6 via the conductive member 19.

  The separator 13 is formed in a bag shape, for example, and accommodates only the positive electrode 11 inside. Examples of the material for forming the separator 13 include a porous film made of a polyolefin resin such as polyethylene (PE) and polypropylene (PP), a woven fabric or a non-woven fabric made of polypropylene, polyethylene terephthalate (PET), methyl cellulose and the like. The tab 14b of the positive electrode 11 and the tab 17b of the negative electrode 12 project upward from the substantially rectangular separator 13. The separator 13 is not limited to the bag shape, and a sheet shape may be used.

  Subsequently, a method of manufacturing the power storage device 1 will be described. The present invention relates to a stacking process in which a positive electrode, a negative electrode, and a separator are combined during a manufacturing process to form a stacked electrode assembly, and other processes have no substitute for known techniques. Therefore, with respect to the steps other than the laminating step, only one example thereof will be briefly described.

  First, the kneading step is performed. In the kneading step, active material particles that are the main component of the active material layer and particles such as a binder and a conductive additive are kneaded in a solvent in a kneader to produce an electrode mixture having good dispersibility of each particle. .. The binder may be a thermoplastic resin such as polyamide-imide or polyimide, or may be a polymer resin having an imide bond in the main chain. The solvent may be an organic solvent such as NMP (N-methylpyrrolidone), methanol or methyl isobutyl ketone, or may be water. The conductive auxiliary agent is, for example, a carbon-based material such as acetylene black, carbon black, or graphite. Next, a coating process is implemented. In the coating step, a strip-shaped metal foil rolled into a roll is unrolled, and the electrode mixture is applied intermittently or continuously to the surface of the metal foil. The metal foil coated with the electrode mixture passes through the drying furnace immediately after the application of the electrode mixture. As a result, the solvent contained in the electrode mixture is dried and removed, and the binder made of resin bonds the active material particles to each other. As a result, an active material layer having fine gaps (voids) between the active material particles is formed.

  Then, a pressing process is performed. In the pressing step, the active material layer formed on the surface of the strip-shaped metal foil is pressed by a roll at a predetermined pressure. As a result, the active material layer is compressed and the density of the active material is increased to an appropriate value. Then, a visual inspection step is performed. In the appearance inspection process, the surface state of the active material layer is confirmed with a camera or the like to determine whether it is a good product or a defective product.

  Then, a reduced pressure drying process is performed. In the reduced pressure drying step, the strip-shaped metal foil on which the active material layer is formed is housed in a vacuum drying furnace and dried under reduced pressure and high temperature. This removes a small amount of solvent remaining in the active material layer. Then, a punching process is performed. In the punching step, the positive electrode 11 and the negative electrode 12 are formed by punching the metal foil on which the active material layer is formed into a predetermined shape using a punching machine.

  In the following first embodiment, the positive electrode 11 is housed in the bag-shaped separator 13 and then laminated with the negative electrode 12. In the separator wrapping step of housing the positive electrode 11 in the separator 13, a pair of the positive electrode 11 and a strip-shaped separator wound in a roll shape is used. First, one of the strip-shaped separators is fed out, and the positive electrode 11 is placed on the one separator while leaving a gap at equal intervals. At this time, the positive electrode 11 is arranged so that the tab 14b of the positive electrode 11 projects in the width direction of the separator. Next, the other strip-shaped separator is fed, and the other strip-shaped separator is overlapped with the one strip-shaped separator so as to sandwich the positive electrode 11. Then, one strip-shaped separator and the other strip-shaped separator are welded at a position surrounding each positive electrode 11. The welded portion may be, for example, one that surrounds and positions the three sides of the positive electrode 11, but preferably the welded portion is provided so as to surround four sides. After the welding, the one and the other strip-shaped separators are cut into the positive electrode 11 and each of the welded portions, and the positive electrode 10 with the separator housed in the bag-shaped separator 13 is prepared.

  Then, a laminating process is performed. In the laminating step, the separator-attached positive electrode 10 and negative electrode 12 obtained in the separator wrapping step and the punching step are sequentially laminated. Then, an assembly process is performed. In the assembling process, the positive electrode 11 and the negative electrode 12 are integrated with each other by stacking the laminated body with the separator 13 interposed therebetween, and the tab 14b of the positive electrode 11 and the tab 17b of the negative electrode 12 are welded to each other. Thereby, the electrode assembly 3 is obtained. Then, the conductive member 16 and the conductive member 19 are welded to the tab 14b of the positive electrode 11 and the tab 17b of the negative electrode 12, respectively.

  The negative electrode 12 and the separator-equipped positive electrode 10 produced in the above punching step have substantially the same shape and size. That is, the width and height of the negative electrode 12 and the width and height of the positive electrode 10 with a separator are substantially equal. In other words, the width and height of the metal foil main body 14a of the positive electrode 11 on which the positive electrode active material layer 15 is formed are slightly smaller than the width and height of the metal foil main body 17a of the negative electrode 12 on which the negative electrode active material layer 18 is formed. It is getting smaller.

  Subsequently, the electrode stacking device 20 according to the first embodiment will be described with reference to FIGS. 3 to 7. FIG. 3 is a diagram schematically showing the overall configuration of the electrode stacking device 20. 4 and 5 are a perspective view and a side view of the electrode stacking device 20. FIG. 6 is a view of the electrode stacking device 20 as viewed from the electrode stacking direction. FIG. 7 is a view of the electrode stacking device 20 as seen from the front. The electrode stacking device 20 is a device that is used in the stacking process described above and stacks a plurality of sheet-shaped electrodes. As shown in FIGS. 3 to 6, the electrode stacking device 20 includes, as main components, a sliding part 30 that slides the electrode 50 downward, and a stacking part 40 that stacks the electrodes 50 that fall from the sliding part 30. Is equipped with. The electrode 50 (the positive electrode 10 with the separator or the negative electrode 12) is laminated by the gliding portion 30 and the laminating portion 40 in the following manner to form the laminated body X. That is, the sliding unit 30 receives the electrode 50 transported by the transport unit 60 such as a belt conveyor on the upper end side of the sliding unit 30, and slides the electrode 50 downward. The electrode 50 that has fallen from the lower end of the sliding section 30 drops to the laminated section 40 arranged below the sliding section 30 and is sequentially laminated in the laminated section 40. As a result, the laminated body X is formed in the laminated portion 40. In addition, in this embodiment, in order to form the laminated body X in which the positive electrodes 10 with separators and the negative electrodes 12 are alternately laminated, the transport unit 60 alternately transports the positive electrodes 10 with separators and the negative electrodes 12. Further, the transport unit 60 transports the positive electrode 10 with separator and the negative electrode 12 such that the tabs 14b and 17b of the positive electrode 10 with separator and the negative electrode 12 are positioned on the upstream side in the transport direction of the electrode 50.

  As shown in FIG. 4, the sliding section 30 and the laminated section 40 are supported by, for example, a frame 70. The frame 70 includes a pair of rail members 74 extending in parallel and a connecting member 73 that connects the pair of rail members 74. The rail member 74 and the connecting member 73 are arranged on a horizontal plane to form a base of the frame 70. A pair of columns 72 extending in the vertical direction is joined to the intersection of the rail member 74 and the connecting member 73. A pair of support members 71 extending in parallel are joined to the upper portions of the pair of columns 72. The pair of support members 71 arranged in the upper part and the pair of rail members 74 arranged in the lower part are parallel to each other, and both extend in the front-rear direction (that is, the transport direction).

  The transport unit 60 is installed on the pair of support members 71. The upper ends of the sliding parts 30 are attached to the tip ends of the pair of support members 71. A columnar or rod-shaped movable member 75 is provided between the pair of rail members 74 in the width direction orthogonal to the transport direction. Both ends of the movable member 75 are supported by the rail members 74 and are movable in the carrying direction. The laminated portion 40 is attached to the central portion of the movable member 75 in the width direction. The movable member 75 is movable in the carrying direction by the rail structure described above, and the position in the carrying direction can be adjusted.

  The sliding portion 30 is erected on the bottom plate portion 31 that slides the electrode 50 downward, and on both edge portions in the horizontal width direction that is orthogonal to the inclination direction of the bottom plate portion 31 (that is, the sliding direction of the electrode 50), and is arranged in the sliding direction. It has a pair of side plate parts 32 extending. The bottom plate portion 31 has a sliding surface 31a that slides the electrode 50 downward. The bottom plate portion 31 is conveyed by the conveyance portion 60 and is inclined with respect to the horizontal direction so that the electrode 50 dropped on the sliding surface 31 a of the bottom plate portion 31 slides downward. The side plate portion 32 contacts the electrode 50 sliding on the sliding surface 31a of the bottom plate portion 31, and guides the electrode 50 to a predetermined position in the width direction.

  As shown in FIGS. 4 to 6, the sliding portion 30 is supported by the pair of support members 71 by connecting the upper ends of the pair of side plate portions 32 and the tip ends of the pair of support members 71. Note that, as shown in FIG. 5, the sliding portion 30 may be rotatable about an axis L1 extending in the width direction through a connecting portion between the side plate portion 32 and the support member 71. With this configuration, it is possible to adjust the inclination angle θ1 of the bottom plate portion 31 with respect to the horizontal direction.

  Further, the pair of side plate portions 32 is provided such that the width of the pair of side plate portions 32 becomes narrower in the sliding direction of the electrode 50. According to this configuration, it is possible to appropriately determine the position in the width direction of the electrode 50 when the electrode 50 separates from the lower end portion of the bottom plate portion 31 and falls.

  As shown in FIGS. 4 and 6, at the lower end of the bottom plate portion 31, two rectangular notches S1 and S2 penetrating in the plate thickness direction of the bottom plate portion 31 are provided. The cutouts S1 and S2 are formed above the lower end edge 31b of the bottom plate portion 31 where the cutouts S1 and S2 are not provided. The notches S1 and S2 have substantially the same shape and size, and are provided apart from each other in the width direction. The notches S1 and S2 are line-symmetric with respect to the center line extending in the tilt direction of the bottom plate portion 31. Here, among the lower end portions of the bottom plate portion 31, three flat portions where the notches S1 and S2 are not provided are provided with the electrodes 50 (specifically, until the electrode 50 is dropped from the lower end portion of the bottom plate portion 31). The portions corresponding to the upper ends of the metal foil body portions 14a and 17a) can be supported. A central support portion 31d is provided between the two notches S1 and S2 that are separated from each other in the width direction. The central support portion 31d smoothly continues to the sliding surface 31a of the bottom plate portion 31. The central support portion 31d is inclined with respect to the horizontal plane and has the same inclination direction and inclination angle as the sliding surface 31a.

  The notch S1 is provided in the width direction at a position corresponding to the position (first position) in the width direction of the rectangular tab 14b of the positive electrode with separator (first electrode) 10. As a result, when the positive electrode 10 with a separator that slides on the sliding surface 31a of the bottom plate portion 31 with the tab 14b positioned on the upstream side falls from the lower end of the bottom plate portion 31, the tab 14b of the positive electrode 10 with a separator is It will pass through the notch S1. Therefore, when the positive electrode with separator 10 falls from the lower end portion of the bottom plate portion 31, it is possible to prevent the tab 14b of the positive electrode with separator 10 from being caught by the lower end portion of the bottom plate portion 31.

  Here, the width of the notch S1 (size in the width direction) is larger than the width of the tab 14b of the positive electrode with separator 10, and the height of the notch S1 (size in the inclination direction of the bottom plate portion 31) is the separator. When the height of the tab 14b of the attached positive electrode 10 is higher than the height of the tab 14b of the attached positive electrode 10, the tab 14b of the positive electrode with separator 10 may be caught on the lower end portion of the bottom plate portion 31 when the positive electrode 10 with the separator falls from the lower end portion of the bottom plate portion 31. It can be surely prevented. However, the height of the notch S1 may be lower than the height of the tab 14b of the positive electrode 10 with the separator. Even with such a configuration, when the positive electrode with separator 10 falls from the lower end portion of the bottom plate portion 31, it is possible to shorten the time during which the tab 14b of the positive electrode with separator 10 is caught by the lower end portion of the bottom plate portion 31. it can. Thereby, the deformation or damage of the tab 14b of the separator-attached positive electrode 10 can be suppressed.

  The notch S2 is provided in a position corresponding to the position (second position) in the width direction of the rectangular tab 17b of the negative electrode (second electrode) 12 in the width direction. As a result, when the negative electrode 12 sliding on the sliding surface 31a of the bottom plate portion 31 with the tab 17b positioned on the upstream side falls from the lower end of the bottom plate portion 31, the tab 17b of the negative electrode 12 has the cutout S2. I will pass. Therefore, when the negative electrode 12 falls from the lower end portion of the bottom plate portion 31, it is possible to prevent the tab 17b of the negative electrode 12 from being caught by the lower end portion of the bottom plate portion 31.

  Here, when the width of the cutout S2 is larger than the width of the tab 17b of the negative electrode 12 and the height of the cutout S2 is higher than the height of the tab 17b of the negative electrode 12, the negative electrode 12 is attached to the bottom plate portion 31. It is possible to reliably prevent the tab 17b of the negative electrode 12 from being caught by the lower end portion of the bottom plate portion 31 when falling from the lower end portion. However, the height of the notch S2 may be lower than the height of the tab 17b of the negative electrode 12. Even with such a configuration, when the negative electrode 12 falls from the lower end portion of the bottom plate portion 31, it is possible to shorten the time during which the tab 17b of the negative electrode 12 is kept hooked on the lower end portion of the bottom plate portion 31. Thereby, the deformation or damage of the tab 17b of the negative electrode 12 can be suppressed.

  Between the two notches S1 and S2 through which the tabs 14b and 17b of the positive electrode with separator 10 and the negative electrode 12 pass, respectively, the bottom plate portion 31 is laminated more than the lower end edge 31e of the portion where the notches S1 and S2 are provided. A central support portion 31d having a lower end edge 31f adjacent to the portion 40 is provided. Since the bottom plate portion 31 has three flat portions not provided with the cutouts S1 and S2, the electrode 50 can be properly supported until just before the electrode 50 falls from the lower end portion of the bottom plate portion 31. In particular, the central support portion 31d that supports the central portion of the electrode 50 in the width direction can suppress the curvature of the electrode 50 and also suppress the variation during stacking.

  With the above configuration, when a plurality of electrodes 50 (positive electrode 10 with negative electrode and negative electrode 12 with separator) having different tab positions are slid downward by one gliding portion 30, the tabs of each electrode 50 are formed on the bottom plate portion 31 of the gliding portion 30. It is possible to prevent the lower end from being caught. That is, the notches S1 and S2 function as escapes for the tabs of the electrode 50. The edge portion 31c where the notches S1 and S2 are formed in the lower end portion of the bottom plate portion 31 may have a chamfered shape (for example, an R shape). This can reduce the deformation or damage of the tab 14b of the positive electrode 10 with the separator when the tab 14b comes into contact with the edge portion 31c of the notch S1. Similarly, the deformation or damage of the tab 17b when the tab 17b of the negative electrode 12 contacts the edge portion 31c of the cutout S2 can be reduced.

  The laminated portion 40 is disposed below the bottom plate portion 31, and guides the electrode 50 falling from the lower end portion of the bottom plate portion 31 to a predetermined position to be laminated. The laminated portion 40 has a bottom wall portion 41, a stopper 42, a pair of side wall portions 43, and protruding wall portions 44 and 45.

  The bottom wall portion 41 is arranged below the lower end portion of the bottom plate portion 31 and is inclined with respect to the horizontal direction. The electrode 50 is placed on the bottom wall portion 41. Specifically, the positive electrode 10 with a separator and the negative electrode 12, which are alternately transported by the transport unit 60, are sequentially dropped onto the bottom wall 41 via the sliding unit 30. Thereby, on the bottom wall portion 41, the laminated body X in which the positive electrodes 10 with separators and the negative electrodes 12 are alternately laminated is formed. The bottom wall portion 41 is provided with two slits 41a extending in the inclination direction of the bottom wall portion 41 for attaching the stopper 42 so that the stopper 42 can move in the inclination direction of the bottom wall portion 41. There is.

  The stopper 42 is erected on the bottom wall portion 41, extends in the width direction orthogonal to the inclination direction of the bottom wall portion 41, and is a tab (tab 14b or tab 17b) of the electrode 50 placed on the bottom wall portion 41. The electrode 50 is stopped by contacting the end portion (the other end portion) on the side where the is not provided. The stopper 42 functions as a guide for aligning the positions of the lower ends of the electrodes 50 stacked on the bottom wall 41. In the present embodiment, the fixing screw 42b is inserted in a position overlapping the slit 41a of the bottom wall portion 41 in the width direction of the stopper 42, and the fixing screw 42b is tightened, so that the stopper 42 is fixed to the bottom wall portion 41. To be done. The tip of the fixing screw 42b penetrates the slit 41a, and by loosening the tightening of the fixing screw 42b, the fixing screw 42b can be slid in the slit 41a in the inclination direction of the bottom wall portion 41. There is. With such a configuration, the position of the stopper 42 in the inclination direction of the bottom wall portion 41 can be adjusted.

  The pair of side wall portions 43 are erected on each of both end edges in the width direction of the bottom wall portion 41, extend in the inclination direction of the bottom wall portion 41, and are separated from each other in a direction orthogonal to the inclination direction. Is. As shown in FIG. 6, the distance between the pair of side wall portions 43 is equal to or larger than the width of the electrode 50, and the upper end portions of the pair of side wall portions 43 are closer to the width of the electrode 50 toward the lower side in the tilt direction. A tapered portion 43a having a narrow interval is provided. A parallel portion 43b having a constant interval is continuously provided on the lower end side of the tapered portion 43a in each side wall portion 43. Thus, since the tapered portions 43a are provided at the upper ends of the pair of side wall portions 43, the electrode 50 falling from the lower ends of the bottom plate portion 31 is first received in the wide portion of the tapered portion 43a. Then, the electrode 50 is guided by the tapered portion 43a as it slides downward. This makes it possible to align the positions of the electrodes 50 in the width direction (width direction of the bottom wall portion 41).

  As described above, the laminated portion 40 is supported by the movable member 75 by connecting the central portion in the width direction of the movable member 75 and the lower end portion of the bottom wall portion 41 via a fixture such as a screw. Further, both ends of the movable member 75 are connected to the pair of rail members 74 so as to be movable in the front-rear direction (conveyance direction). Therefore, the stacking unit 40 can slide in the front-rear direction by moving the movable member 75 in the front-rear direction. Note that, as shown in FIG. 5, the laminated portion 40 may be rotatable about an axis L2 extending in the width direction through the connecting portion between the bottom wall portion 41 and the movable member 75. According to this configuration, the inclination angle θ2 of the bottom wall portion 41 with respect to the horizontal direction can be adjusted.

  As shown in FIG. 5, the bottom wall portion from the contact surface 42a of the stopper 42 that contacts the other end portion of the electrode 50 to the lower end edge 31b of the bottom plate portion 31 where the notches S1 and S2 are not provided. The distance d1 in the tilt direction of 41 is smaller than the distance d2 from the other end of the electrode 50 to the tip of the tab (tab 14b or tab 17b) of the electrode 50. In this configuration, when the electrode 50 falls from the lower end portion of the bottom plate portion 31, the tab 14b and the tab 17b pass through the notches S1 and S2, respectively, and the sliding portion 30 and the laminated portion 40 are arranged. There is. That is, the distance d1 in the inclination direction of the bottom wall portion 41 from the contact surface 42a of the stopper 42 to the lower end edge 31b of the lower end portion of the bottom plate portion 31 where the notches S1 and S2 are not provided is the entire length of the electrode 50 (the other side). The sliding portion 30 and the laminated portion 40 are arranged so as to be shorter than the distance d2) from the end of the tab to the tip of the tab. As a result, the position where the other end of the electrode 50 falling from the lower end of the bottom plate 31 comes into contact with the upper surface of the bottom wall portion 41 (or the electrode 50 already mounted on the bottom wall portion 41) of the laminated portion 40 is positioned. , As close as possible to the contact surface 42a of the stopper 42. That is, the other end of the electrode 50 contacts the upper surface of the bottom wall portion 41 (or the electrode 50 already mounted on the bottom wall portion 41) of the laminated portion 40 and then slides down to the contact surface 42a of the stopper 42. Can be shortened. This can reduce the impact on the electrode 50 when the electrode 50 is stacked on the stacked portion 40, and can suppress the occurrence of displacement during stacking and damage to the electrode 50. In addition, the fact that the electrode 50 floats in the air for a short time also contributes to the suppression of the occurrence of displacement during stacking and the stable supply of the electrode 50.

  In addition, the sliding portion 30 and the laminated portion 40 are such that the electrode 50 is slid on the sliding surface 31 a of the bottom plate portion 31 until the electrode 50 falls from the lower end portion of the bottom plate portion 31 and lands on the bottom wall portion 41. It may be arranged so as to contact at least one of the side plate portion 32 of the sliding portion 30 and the side wall portion 43 of the laminated portion 40. More specifically, when the electrode 50 falls from the lower end portion of the bottom plate portion 31, it is possible to continuously transition from a state where the electrode 50 is in contact with the side plate portion 32 to a state in which it is in contact with the bottom wall portion 41. As described above, the sliding portion 30 and the laminated portion 40 may be arranged close to each other. In this case, when the electrode 50 falls from the lower end portion of the bottom plate portion 31, the electrode 50 protruding downward from the lower end portion of the bottom plate portion 31 with a part of the upper side of the electrode 50 in contact with the side plate portion 32. A part of the lower side of the side wall contacts the side wall portion 43 (for example, the above-described tapered portion 43a). That is, it is possible to prevent the electrode 50 from floating in the air without coming into contact with either the gliding portion 30 or the laminated portion 40. Thereby, when the electrode 50 falls from the lower end portion of the bottom plate portion 31, it is possible to appropriately prevent the position of the electrode 50 in the width direction from being displaced. As a result, the electrode 50 can be appropriately guided to the position where the stacked body X is to be formed.

  As shown in FIGS. 4 and 7, the upper end portion of the bottom wall portion 41 is provided with two projecting wall portions 44 and 45 that project upward in the inclination direction of the bottom wall portion 41. Further, the notches S1 and S2 described above are provided at positions corresponding to the protruding wall portions 44 and 45, respectively. In other words, the lower end of the bottom plate portion 31 is provided with notches S1 and S2 penetrating in the plate thickness direction of the bottom plate portion 31 at positions corresponding to the projecting wall portions 44 and 45. Accordingly, for example, when the laminated portion 40 is slid in order to take out the laminated body X of the electrodes 50 laminated on the bottom wall portion 41, the protruding wall portions 44 and 45 provided on the bottom wall portion 41 have the bottom plates. It becomes possible to pass through the notches S1 and S2 provided at the lower end of the portion 31. Thus, the sliding portion 30 and the stacked portion 40 are brought as close as possible in order to suppress the positional displacement and damage of the electrode 50 stacked on the bottom wall portion 41, and the stacked portion 40 is removed without interfering with the sliding portion 30. You can slide it.

  The one protruding wall portion 44 is provided at a position corresponding to the tab 14b of the separator-attached positive electrode 10 in the width direction orthogonal to the inclination direction of the bottom wall portion 41. The other protruding wall portion 45 is provided at a position corresponding to the tab 17b of the negative electrode 12 in the width direction. Therefore, the tabs of the electrode 50 are supported by the projecting wall portions 44 and 45 provided at the positions corresponding to the tabs (the tab 14b and the tab 17b) of the electrode 50 which are dropped from the sliding portion 30 and stacked on the bottom wall portion 41. can do. As a result, the tab of the electrode 50 can be prevented from protruding from the upper end of the bottom wall 41 and bending due to gravity.

  The positional relationship between the notches S1 and S2 and the protruding wall portions 44 and 45 will be described. The protruding wall portions 44 and 45 are arranged so as to overlap the notches S1 and S2 when viewed in the stacking direction of the electrodes 50. .. As a result, when the tab 14b of the positive electrode 10 with separator is dropped onto the bottom wall portion 41 through the notch S1 provided at the lower end portion of the bottom plate portion 31, the tab 14b of the positive electrode 10 with separator is provided with the protruding wall portion 44. It will land on the position where is provided. Moreover, when the tab 17b of the negative electrode 12 passes through the notch S2 provided in the lower end portion of the bottom plate portion 31 and drops to the bottom wall portion 41, the tab 17b of the negative electrode 12 lands on the protruding wall portion 45. Become. Thereby, the tab 14b of the positive electrode 10 with the separator or the tab 17b of the negative electrode 12 dropped from the lower end portion of the bottom plate portion 31 can be appropriately supported by the projecting wall portions 44 and 45.

  Further, as shown in FIG. 8, the protruding wall portions 44 and 45 are arranged so as to be accommodated in the notches S1 and S2 when viewed from the front. Thereby, when the laminated portion 40 is slid in the front-rear direction with respect to the sliding portion 30, the protruding wall portions 44 and 45 provided at the upper end portion of the bottom wall portion 41 are provided at the lower end portion of the bottom plate portion 31. It is possible to pass through the cutouts S1 and S2. Therefore, for example, the movement of the stacking portion 40 between the stacking position for stacking the electrode 50 on the stacking portion 40 and the take-out position for taking out the stacked body X of the electrode 50 stacked on the stacking portion 40 can be performed back and forth. It can be easily performed by a uniaxial movement operation in one direction.

  As described above, according to the electrode stacking apparatus 20 of the first embodiment, since the notches S1 and S2 penetrating in the plate thickness direction of the bottom plate portion 31 are provided at the lower end portion of the bottom plate portion 31, the electrode 50 is formed. The tab (the tab 14b or the tab 17b) of the electrode 50 can pass through the notches S1 and S2 when is dropped from the lower end of the bottom plate portion 31. As a result, it is possible to prevent the tab from being caught on the lower end portion of the bottom plate portion 31 when the electrode 50 falls. Therefore, when the sheet-shaped electrode 50 having the tab is dropped and stacked, the deformation or damage of the tab can be suppressed.

  The electrode stacking device of the second embodiment will be described with reference to FIG. FIG. 8: is a figure which shows typically the whole structure of the electrode lamination apparatus of 2nd Embodiment. As shown in FIG. 8, in the electrode stacking device 80 of the second embodiment, the sliding part 30 is provided below the sliding part (first sliding part) 30A and the sliding part (second sliding part) 30A. The difference from the electrode stacking apparatus 20 of the first embodiment is that it has a sliding section 30B.

  As shown in FIG. 8, in the system including the electrode stacking device 80 according to the second embodiment, the transport unit 60 is divided into a transport unit 60A that transports the positive electrode 10 with a separator and a transport unit 60B that transports the negative electrode 12. .. The sliding portion 30A has a bottom plate portion (first bottom plate portion) 31A that is inclined with respect to the horizontal direction so that the separator-attached positive electrode 10 transported by the transport portion 60A slides downward. The sliding portion 30B has a bottom plate portion (second bottom plate portion) 31B inclined with respect to the horizontal direction so that the negative electrode 12 transported by the transport portion 60B slides downward.

  A notch (first notch) S1 penetrating in the plate thickness direction of the bottom plate part 31A is provided at a position corresponding to the tab 14b of the positive electrode with separator 10 in the width direction at the lower end part of the bottom plate part 31A of the sliding part 30A. It is provided. A notch that penetrates in the thickness direction of the bottom plate portion 31B at a position corresponding to the tab 14b of the positive electrode with separator 10 and the tab 17b of the negative electrode 12 in the width direction at the lower end portion of the bottom plate portion 31B of the sliding portion 30B (second Notches S1 and S2 are provided.

  In the electrode stacking apparatus 80 of the second embodiment, when the separator-attached positive electrode 10 sliding on the bottom plate portion 31A with one end positioned above falls from the lower end portion of the bottom plate portion 31A, the separator-attached positive electrode 10 The tab 14b of 4 passes through the notch S1 provided at the lower end of the bottom plate portion 31A. In addition, when the negative electrode 12 sliding on the bottom plate portion 31B with one end portion positioned above falls from the lower end portion of the bottom plate portion 31B, the tab 17b of the negative electrode 12 is provided with the cut tab provided on the bottom plate portion 31B. It will pass through the notch S2. Further, since the bottom plate portion 31B is also provided with the notch S1 corresponding to the tab 14b of the positive electrode with separator 10, the positive electrode with separator dropped from the lower end portion of the bottom plate portion 31A provided above the bottom plate portion 31B. The tab 14b of 10 can pass through the notch S1 provided in the bottom plate portion 31B. Thereby, when each of the plurality of electrodes 50 having different tab positions is slid downward by the upper and lower sliding portions 30A and 30B, the tabs of the respective electrodes 50 have the bottom plate portions 31A and 30A of the sliding portions 30A and 30B. It is possible to prevent the lower end of 31B from being caught.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, it is not always necessary to provide the protruding wall portions 44 and 45 at the tip of the bottom wall portion 41 of the laminated portion 40. Further, the positions and shapes of the notches provided in the bottom plate portion of the sliding portion are not limited to the positions and shapes of the notches S1 and S2 shown in the above embodiment. Similarly, the positions and shapes of the protruding wall portions of the laminated portion are not limited to the positions and shapes of the protruding wall portions 44 and 45 shown in the above embodiment.

  FIG. 9 shows a modification of the notch and the protruding wall portion. In the example of FIG. 9A, the notch S3 has a concave shape formed by largely hollowing out the central portion in the width direction of the lower end portion of the bottom plate portion 31. Corresponding to one notch S3, one projecting wall portion 46 is formed in the center portion in the width direction of the upper end portion of the bottom wall portion 41. According to such a configuration, since only one notch S3 and one protruding wall portion 46 are required to be provided, processing for providing the notch S3 in the bottom plate portion 31 and processing for providing the protruding wall portion 46 in the bottom wall portion 41 Can be performed easily.

  In the example of FIG. 9B, the notches S4 and S5 are formed in each of both end edge portions in the width direction of the lower end portion of the bottom plate portion 31. Thereby, the shape of the lower end portion of the bottom plate portion 31 is a convex shape. Corresponding to the notches S4 and S5, projecting wall portions 47 and 48 are formed at both ends of the upper end portion of the bottom wall portion 41 in the width direction. By providing the cutouts S4 and S5 and the protruding wall portions 47 and 48, it is possible to appropriately cope with the case where the tabs of the electrode 50 laminated on the laminated portion 40 are located at both ends in the width direction. You can

  Further, in the above-described embodiment, the case where there are two types of the positive electrode 10 with a separator and the negative electrode 12 as the electrodes 50 to be stacked is exemplified, but the types of the electrodes 50 to be stacked are not limited to this. For example, a separator may be sandwiched between the positive electrode 11 and the negative electrode 12 in the stacking process. In this case, the positive electrode 11, the separator 13, the negative electrode 12, the separator 13, the positive electrode,...

  Further, when the structure in which the laminated portion 40 rotates about the axis L2 extending in the width direction is adopted, the protruding wall portion provided on the bottom wall portion 41 causes the notch of the bottom plate portion 31 to be formed during the rotation. You may provide the gliding part 30 and the laminated part 40 so that it may become a positional relationship to pass. As a result, similar to the case where the laminated portion 40 is slidably moved in the front-rear direction, the sliding portion 30 and the laminated portion 40 are arranged in order to suppress the positional displacement and damage of the electrode 50 laminated on the bottom wall portion 41. It is possible to move (rotate) the stacking unit 40 without interfering with the sliding unit 30 while bringing the and S as close as possible.

  DESCRIPTION OF SYMBOLS 1... Power storage device, 3... Electrode assembly, 10... Positive electrode with separator (first electrode), 11... Positive electrode, 12... Negative electrode (second electrode), 13... Separator, 14... Metal foil, 14b... Tab, 17... Metal foil, 17b... Tab, 20, 80... Electrode laminating device, 30, 30A, 30B... Sliding part, 31, 31A, 31B... Bottom plate part, 31a... Sliding surface, 31b, 31e... Bottom edge, 31d... Center Support portion, 32... Side plate portion, 40... Laminated portion, 41... Bottom wall portion, 41a... Slit, 42... Stopper, 42a... Contact surface, 43... Side wall portion, 43a... Tapered portion, 43b... Parallel portion, 44, 45 , 46, 47, 48... Projecting wall portion, 50... Electrode, 60... Conveying portion, S1 to S5... Notches.

Claims (6)

An electrode stacking device for stacking a plurality of sheet-shaped electrodes,
A sliding portion having a bottom plate portion inclined with respect to the horizontal direction so as to slide the electrode downward,
A stacking unit that is disposed below the lower end of the bottom plate, and guides and stacks the electrodes that fall from the lower end to a predetermined position,
At the lower end of the bottom plate portion, a notch that penetrates in the thickness direction of the bottom plate portion is provided,
An electrode tab is provided on one end of the electrode ,
The notch is provided at a position corresponding to the electrode tab in the width direction orthogonal to the tilt direction of the bottom plate portion,
The notch width is much larger than the width of the electrode tabs,
The sliding portion slides the electrode in a state in which one end of the electrode is located on the upstream side of the other end.
Electrode laminating device. The bottom plate portion has a lower end portion provided with the two notches that are spaced apart from each other, and a support portion that is continuous with the sliding surface of the bottom plate portion is provided between the two notches,
The electrode stacking device according to claim 1. The laminated portion is
A bottom wall portion that is disposed below the lower end portion of the bottom plate portion and is inclined with respect to the horizontal direction, and on which the electrode is mounted;
Standing on the bottom wall portion, extending in a direction orthogonal to the inclination direction of the bottom wall portion, contacting the other end of the electrode placed on the bottom wall portion to stop the electrode. Has a stopper and
The distance from the contact surface of the stopper that comes into contact with the other end of the electrode to the lower edge of the bottom plate portion where the notch is not provided is the distance from the other end of the electrode to that of the electrode. Less than the distance to the tip of the electrode tab ,
The electrode stacking device according to claim 1. The laminated portion is
A bottom wall portion that is disposed below the lower end portion of the bottom plate portion and is inclined with respect to the horizontal direction, and on which the electrode is mounted;
While standing upright on the bottom wall portion and extending in the inclination direction of the bottom wall portion, a pair of side wall portions separated in a direction orthogonal to the inclination direction, and,
The distance between the pair of side wall portions is not less than the width of the electrode,
The upper ends of the pair of side wall parts are provided with tapered parts whose intervals are narrowed so as to approach the width of the electrodes as they go downward in the tilt direction.
The electrode stacking device according to claim 1. The electrodes are
A first electrode in which the electrode tab is provided at a first position in the width direction,
The electrode tab has a second electrode provided at a second position different from the first position in the width direction,
The notch is provided at a position corresponding to the first position and the second position,
The electrode stacking device according to claim 1. The electrodes are
A first electrode in which the first electrode tab is provided at a first position in the width direction;
The second electrode tab has a second electrode provided at a second position different from the first position in the width direction,
The sliding part has a first sliding part having a first bottom plate part inclined with respect to a horizontal direction so as to slide the first electrode downward,
A second slide portion provided below the first slide portion and having a second bottom plate portion inclined with respect to the horizontal direction so as to slide the second electrode downward,
At the lower end of the first bottom plate portion, the first notch that penetrates in the plate thickness direction of the first bottom plate portion is provided at a position corresponding to the first electrode tab in the width direction. Has been
Wherein the second bottom plate portion lower end portion of a position corresponding to the first said electrode tab and the second of said electrode tabs of the said width direction to penetrate in the thickness direction of the second bottom plate portion A second said notch is provided,
The electrode stacking device according to claim 1.

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