JP2016197566A - Electrode lamination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode lamination device that can easily pick up electrodes laminated at a laminating unit irrespective of the arrangement of a sliding unit and the laminating unit.SOLUTION: An electrode laminating apparatus 100 is an electrode laminating apparatus for laminating a plurality of sheet-like electrodes 50, and includes a sliding unit 40 having a bottom plate portion 41 which is inclined with respect to a horizontal direction so as to make the electrodes 50 slide downwards, and a laminating unit 60 for laminating the electrodes 50 dropping from a running unit 40. The laminating unit 60 includes an electrode receiving portion 70 for guiding and stacking the electrode 50 falling from the bottom plate portion 41 to a predetermined position, and a support unit 80 for supporting an electrode reception unit 70 slidably between a first position for causing the electrode 50 falling from the bottom plate portion 41 to land on the electrode reception unit 70 and a second position which is farther from the bottom plate portion 41 than the first position in the horizontal direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electrode stacking apparatus.

  As described in Patent Document 1, there is known an apparatus for manufacturing a stacked secondary battery in which sheet-like electrodes are stacked. The apparatus includes a supply mechanism that supplies a sheet-like electrode, a drop moving unit that is disposed below the supply mechanism and moves the electrode supplied from the supply mechanism to a predetermined position, and a discharge unit of the drop transfer unit And laminating means for guiding and laminating the electrodes discharged from the discharge portion 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.

JP 2012-91372 A

  By the way, when a laminated body is paper, a resin sheet, etc., even if the side surface of a laminated body is rubbed a little, there is no influence. However, when the laminate is an electrode, an active material layer or a metal foil may be exposed on the side surface of the laminate. In particular, when the cut surface of the electrode is exposed, the binder applied between the active material particles or between the active material particles and the metal foil may be weakened on the cut surface due to a load applied during cutting. For this reason, when the electrode is removed from the laminated portion, if the side surface of the electrode is rubbed against a standing wall that functions as a stopper and contacts the electrode during lamination, the active material is peeled off and foreign matter is generated due to the peeling. There is a fear. Therefore, particularly when the laminated body is an electrode, when the electrode is taken out from the guide laminated portion, for example, a process of moving the electrode away from the standing wall is performed so that the electrode does not rub against the standing wall of the guide laminated portion. .

  In order to execute such an electrode extraction process, as shown in FIG. 4 of Patent Document 1, the discharge portion at the lower end of the sliding portion and the guide laminated portion do not overlap each other and are separated from each other. It is preferable to set an interval between the portion and the guide laminated portion. On the other hand, if the time during which the electrode is in the air becomes long, the posture of the electrode is likely to vary, and there may be a variation in the laminated state of the electrodes. For this reason, in order to suppress the variation of the electrode at the time of lamination | stacking to a guide lamination | stacking part, it is preferable that the discharge | emission part and a guide lamination | stacking part exist in the state as close as possible.

  An object of this invention is to provide the electrode lamination apparatus which can take out the electrode laminated | stacked on the lamination | stacking part easily irrespective of arrangement | positioning of a sliding part and a lamination | stacking part.

  An electrode laminating apparatus according to an aspect of the present invention is an electrode laminating apparatus for laminating a plurality of sheet-like electrodes, and includes a sliding portion having a bottom plate portion inclined with respect to the horizontal direction so that the electrodes are slid downward. A laminated portion for laminating the electrodes falling from the sliding portion, and the laminated portion comprises an electrode receiving portion for laminating the electrodes falling from the bottom plate portion to a predetermined position, and an electrode falling from the bottom plate portion. A support portion that movably supports the electrode receiving portion between a first position for landing on the receiving portion and a second position that is further away from the bottom plate portion than the first position in the horizontal direction. .

  In this electrode stacking apparatus, the electrode receiving portion includes a first position for landing the electrode falling from the bottom plate portion on the electrode receiving portion, and a second position farther from the bottom plate portion than the first position in the horizontal direction. In between, it is supported by a support part so that movement is possible. Therefore, when the electrodes are stacked, the electrode receiving portion can be supported at the first position, and when the stacked electrodes are taken out, the electrode receiving portion can be moved to the second position and supported. Thereby, the electrode laminated | stacked on the electrode receiving part can be taken out easily irrespective of arrangement | positioning of a sliding part and an electrode receiving part (lamination | stacking part).

  In the electrode stacking apparatus, the support portion includes a rail portion extending in the same direction as the horizontal component of the sliding direction in the sliding portion, and a sliding portion that supports the electrode receiving portion and slides along the rail portion. May be.

  According to this electrode stacking apparatus, the movement of the electrode receiving portion is slid along the same direction as the horizontal component of the sliding direction in the sliding portion, that is, the direction perpendicular to the width direction of the electrodes stacked on the electrode receiving portion. It can be. Thereby, it can suppress that the position of the electrode laminated | stacked on the electrode receiving part shifts | deviates by the movement of an electrode receiving part. In addition, since the rail portion has a structure extending in the same direction as the horizontal component of the sliding portion in the sliding direction, it is possible to suppress variations in the width direction in the overall configuration of the electrode stacking device, and to achieve a compact device. it can.

  The electrode stacking device detects the number of electrodes stacked on the electrode receiving portion, and when the number of detected electrodes reaches a predetermined number, the electrode receiving portion is moved from the first position to the second position. You may further provide the control part moved to.

  According to the electrode stacking apparatus, the control unit automatically moves the electrode receiving unit from the first position to the second position when the number of electrodes stacked on the electrode receiving unit reaches a predetermined number. It can be moved. In other words, when the lamination process for laminating the electrodes on the electrode receiving part is completed, the electrode receiving part can be automatically moved to a position (second position) for transferring the electrode (laminated body) to the next process. Therefore, workability can be improved.

  In the electrode stacking apparatus, the electrode receiving portion is disposed below the lower end portion of the bottom plate portion, is inclined with respect to the horizontal direction, has a bottom wall portion on which the electrode is placed, and is provided at the upper end portion of the bottom wall portion. Is provided with a protruding wall portion protruding upward in the inclination direction of the bottom wall portion, and a notch penetrating in the thickness direction of the bottom plate portion at a position corresponding to the protruding wall portion at a lower end portion of the bottom plate portion. May be provided.

  In this electrode laminating apparatus, a notch is provided at the lower end portion of the bottom plate portion of the sliding portion at a position corresponding to the protruding wall portion provided at the upper end portion of the bottom wall portion of the electrode receiving portion. Thus, when the electrode receiving portion is slid to take out the electrode laminated on the bottom wall portion, the protruding wall portion provided on the bottom wall portion has a notch provided on the lower end portion of the bottom plate portion. It is possible to pass. Accordingly, the electrode receiving portion can be moved while bringing the sliding portion and the electrode receiving portion as close as possible in order to suppress the displacement and damage of the electrodes stacked on the bottom wall portion.

  In the electrode stacking apparatus, a protruding portion is provided at one end of the electrode, and the protruding wall portion is provided at a position corresponding to the protruding portion in the width direction orthogonal to the inclination direction of the bottom wall portion. May be.

  According to this electrode stacking apparatus, the protruding portion of the electrode can be supported by the protruding wall portion provided at a position corresponding to the protruding portion of the electrode falling from the sliding portion and stacked on the bottom wall portion. Thereby, it can prevent that the protrusion part of an electrode protrudes outside from the upper end part of a bottom wall part, and bends by gravity.

  In the electrode laminating apparatus, the protruding wall portion may be disposed so as to overlap the notch when viewed from the electrode laminating direction.

  According to this electrode stacking apparatus, when the protruding portion of the electrode falls to the bottom wall portion through the notch provided in the lower end portion of the bottom plate portion, the protruding portion of the electrode lands on the protruding wall portion. Become. Thereby, the protrusion part of the electrode dropped from the lower end part of the bottom plate part can be appropriately supported by the protrusion wall part.

  In the electrode stacking apparatus, the protruding wall portion may be disposed so as to be accommodated in the notch when viewed from the front.

  According to this electrode stacking apparatus, when the electrode receiving portion is slid in the front-rear direction with respect to the sliding portion, the protruding wall portion provided at the upper end portion of the bottom wall portion is provided at the lower end portion of the bottom plate portion. You can pass through a notch. Thereby, for example, the movement of the electrode receiving portion between the stacking position for stacking the electrode on the electrode receiving portion and the take-out position for taking out the electrode stacked on the electrode receiving portion is uniaxially moved in the front-rear direction. This can be done easily by operation.

  According to the present invention, it is possible to easily take out the electrode laminated on the laminated portion regardless of the arrangement of the sliding portion and the laminated portion.

It is sectional drawing which shows an example of the 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 which shows a part of electrode lamination apparatus of 1st Embodiment. It is a side view showing a part of electrode laminating device of a 1st embodiment. It is the figure which looked at a part of electrode laminating device of a 1st embodiment from the lamination direction of an electrode. It is the figure which looked at a part of electrode laminating device of a 1st embodiment from the front. It is a figure which shows typically a partial 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 figure which shows the modification of a bottom wall part.

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

  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 apparatus according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. As shown in FIG.1 and FIG.2, the electrical storage apparatus 1 is comprised as a vehicle-mounted nonaqueous electrolyte secondary battery called a lithium ion secondary battery, for example.

  The power storage device 1 includes a hollow 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. On the inner wall surface of the case 2, an insulating film (not shown) is provided. For example, a non-aqueous organic solvent-based electrolyte 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 are impregnated with the electrolytic solution. . On the upper surface of the case 2, the positive terminal 5 and the negative terminal 6 are disposed so as to be separated 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 includes a positive electrode 11, a negative electrode 12, and a bag-shaped separator 13 disposed between the positive electrode 11 and the negative electrode 12. For example, the positive electrode 11 is accommodated in the separator 13. With the positive electrode 11 housed in the separator 13, the positive electrode 11 and the negative electrode 12 are alternately stacked via the separator 13. That is, the electrode assembly 3 includes the separator-attached positive electrode 10 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 connected to the lower ends of the positive electrode 10 with the separator and the negative electrode 12 (the positive terminal 5 And the end on the side opposite to the negative electrode terminal 6) can be accommodated in the case 2 so as to be in contact with the bottom surface of the case 2. An insulating member (not shown) is disposed on the inner surface of the case 2. Therefore, in this case, the lower ends of the positive electrode 10 with a separator and the negative electrode 12 are in contact with the bottom surface of the case 2 via an insulating member. However, a minute gap may be formed between the lower ends of the positive electrode with separator 10 and the negative electrode 12 and the bottom surface of the case 2 other than the space occupied by the insulating member.

  The positive electrode 11 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 a porous layer formed including a positive electrode active material and a binder. In other words, the positive electrode active material is supported on both surfaces of the substantially rectangular metal foil main body portion 14a. 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. A tab (protrusion) 14b is formed on the upper edge (one end) of the main body 14a corresponding to the position of the positive electrode terminal 5. The tab 14b does not carry a positive electrode active material. The tab 14 b extends upward from the upper edge portion of the main body portion 14 a and is connected to the positive electrode terminal 5 via the conductive member 16.

  The negative electrode 12 includes a metal foil 17 made of, for example, 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 formed including a negative electrode active material and a binder. In other words, the negative electrode active material is supported on both surfaces of the substantially rectangular metal foil main body portion 17a. 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 ) And the like, and boron-added carbon. A tab (protrusion) 17b is formed on the upper edge (one end) of the main body 17a corresponding to the position of the negative electrode terminal 6. The tab 17b does not carry a negative electrode active material. The tab 17 b extends upward from the upper edge portion of the main body portion 17 a 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 therein. 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), methylcellulose and the like. The tab 14 b of the positive electrode 11 and the tab 17 b of the negative electrode 12 protrude upward from the substantially rectangular separator 13. The separator 13 is not limited to a bag shape, and a sheet shape may be used.

  Then, the manufacturing method of the electrical storage apparatus 1 is demonstrated. The present invention relates to a lamination process in which a positive electrode, a negative electrode, and a separator are combined to form a laminated electrode assembly during the manufacturing process, and there is no substitute for a known technique for other processes. Accordingly, only the outline of the steps other than the laminating step will be described for one example.

  First, a kneading step is performed. In the kneading step, active material particles, which are the main components of the active material layer, and particles such as a binder and a conductive aid are kneaded in a solvent in a kneader to produce an electrode mixture with good dispersion of each particle. . The binder may be a thermoplastic resin such as polyamideimide 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, methyl isobutyl ketone, or water. The conductive assistant is, for example, a carbon-based material such as acetylene black, carbon black, or graphite. Next, a coating process is implemented. In the coating process, a strip-shaped metal foil wound in a roll shape is fed out, and an electrode mixture is intermittently or continuously applied 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. Thereby, the solvent contained in the electrode mixture is dried and removed, and a binder made of resin bonds the active material particles to each other. Thereby, an active material layer having fine gaps (holes) between the active material particles is formed.

  Next, 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 with a roll at a predetermined pressure. Thereby, the active material layer is compressed, and the density of the active material is increased to an appropriate value. Next, an appearance inspection process is performed. In the appearance inspection process, the surface state of the active material layer is confirmed with a camera or the like, and a non-defective product and a defective product are determined.

  Next, a vacuum drying step 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 by increasing the temperature under reduced pressure. Thereby, a slight solvent remaining in the active material layer is removed. Next, a punching process is performed. In the punching process, 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 accommodated in the bag-shaped separator 13 and then laminated with the negative electrode 12. In the separator wrapping process in which the positive electrode 11 is accommodated 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 separators is fed out, and the positive electrode 11 is placed on the separator while leaving gaps at equal intervals. At this time, the positive electrode 11 is arranged so that the tab 14b of the positive electrode 11 protrudes in the width direction of the separator. Next, the other strip separator is fed out, and the other strip separator is overlapped with one strip separator so as to sandwich the positive electrode 11. Thereafter, one strip separator and the other strip separator are welded at a position surrounding each positive electrode 11. The welded portion may be any member that surrounds and positions the three sides of the positive electrode 11, for example. Preferably, the welded portion is provided so as to surround the four sides. After welding, one and the other strip separators are cut for each of the positive electrode 11 and the welded portion, and the positive electrode with separator 10 accommodated in the bag-like separator 13 is created.

  Next, a lamination process is performed. In the laminating step, the separator-attached positive electrode 10 and the negative electrode 12 obtained in the separator wrapping step and the punching step are sequentially laminated. Next, an assembly process is performed. In the assembly process, the stacked body in which the positive electrode 11 and the negative electrode 12 are stacked via the separator 13 is integrated, and the tab 14b of the positive electrode 11 and the tab 17b of the negative electrode 12 are welded respectively. 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-attached positive electrode 10 produced by the punching process have substantially the same shape and size. That is, the width and height of the negative electrode 12 are substantially equal to the width and height of the positive electrode 10 with a separator. In other words, the width and height of the metal foil main body portion 14a of the positive electrode 11 on which the positive electrode active material layer 15 is formed are slightly larger than the width and height of the metal foil main body portion 17a of the negative electrode 12 on which the negative electrode active material layer 18 is formed. It is getting smaller.

  Then, the electrode lamination apparatus 100 of 1st Embodiment is demonstrated using FIGS. 3-7. FIG. 3 is a diagram schematically illustrating the overall configuration of the electrode stacking apparatus 100. 4 and 5 are a perspective view and a side view showing a part of the electrode stacking apparatus 100. FIG. FIG. 6 is a view of a part of the electrode stacking apparatus 100 as viewed from the electrode stacking direction. FIG. 7 is a view of a part of the electrode stacking apparatus 100 as viewed from the front. The electrode laminating apparatus 100 is an apparatus for laminating a plurality of sheet-like electrodes used in the above laminating process. As shown in FIGS. 3 to 6, the electrode stacking apparatus 100 includes, as main components, a supply unit 20 that supplies an electrode 50 (a positive electrode 10 with a separator and a negative electrode 12), and an electrode 50 that is supplied by the supply unit 20. A transport unit 30 that transports the electrode 50, a sliding unit 40 that slides the electrode 50 transported by the transport unit 30 downward, a stacking unit 60 that stacks the electrodes 50 that fall from the sliding unit 40, a supply unit 20, and a transport unit 30. , And a control unit 90 that controls the operation of the stacking unit 60.

  The electrode 50 (the positive electrode 10 with a separator or the negative electrode 12) is laminated as follows, thereby forming the laminated body X on the laminated portion 60. That is, the sliding unit 40 receives the electrode 50 transported by the transport unit 30 on the upper end side of the sliding unit 40 and slides the electrode 50 downward. The electrode 50 dropped from the lower end portion of the sliding portion 40 falls on the stacking portion 60 disposed below the sliding portion 40 and is sequentially stacked in the stacking portion 60. Thereby, the stacked body X is formed in the stacked portion 60.

  The supply unit 20 supplies the electrodes 50 (the positive electrode 10 with the separator 10 and the negative electrode 12) manufactured in the previous process (that is, the separator wrapping process and the punching process) to the transport unit 30. The supply unit 20 includes, for example, one belt conveyor that connects between the production line of the positive electrode 10 with a separator and the conveyance unit 30, and another belt conveyor that connects between the production line of the negative electrode 12 and the conveyance unit 30. Have. The supply part 20 transfers the positive electrode 10 with a separator and the negative electrode 12 on the conveyance part 30 by such two belt conveyors alternately. Here, the supply unit 20 puts the positive electrode with separator 10 and the negative electrode 12 on the transport unit 30 so that the tabs 14b and 17b of the positive electrode with separator 10 and the negative electrode 12 are positioned on the upstream side in the transport direction of the electrode 50. Transfer.

  When the stacking of the electrodes 50 in the stacking unit 60 is completed, the supply unit 20 receives a control signal instructing to stop the supply of the electrodes 50 from the control unit 90, and stops the supply of the electrodes 50 to the transport unit 30 To do. As will be described in detail later, as an example in the present embodiment, the control unit 90 detects that the number of electrodes 50 stacked on the stacking unit 60 has reached a predetermined number, thereby detecting the number of electrodes 50 in the stacking unit 60. It detects that the lamination has been completed, and transmits the above-described control signal to the supply unit 20. In addition, a buffer unit for temporarily storing a certain amount of the positive electrode 10 with separator and the negative electrode 12 may be provided between the supply unit 20 and each production line of the positive electrode 10 with separator and the negative electrode 12. .

  The transport unit 30 supplies the separator-attached positive electrode 10 and negative electrode 12 supplied by the supply unit 20 and alternately placed at regular intervals to the sliding unit 40. The conveyance unit 30 is, for example, a belt conveyor, and includes a driving unit 31 that drives the belt conveyor. The drive unit 31 is a motor that drives a belt conveyor, for example. The operation and stop of the drive unit 31 are controlled by a control signal from the control unit 90. Specifically, when the stacking of the electrodes 50 in the stacking unit 60 is completed, the drive unit 31 receives a control signal instructing to stop driving the transport unit 30 from the control unit 90 and stops driving the transport unit 30. To do.

  When the power storage device 1 is a lithium ion secondary battery, the front end portion (the end portion on the sliding portion 40 side) of the transport unit 30 may be provided with an electrode dispensing means (for example, a picker) (not shown). Since both ends of the electrode assembly 3 of the lithium ion secondary battery are the negative electrodes 12, it is necessary to adjust so that the electrode 50 initially stacked on the stacked portion 60 becomes the negative electrode 12. Therefore, when the electrode dispensing means described above completes the stacking of the electrodes 50 in the stacking unit 60, the electrode 50 at the front end of the transport unit 30 is the positive electrode 10 with a separator, based on an instruction from the control unit 90. In this case, the separator-attached positive electrode 10 is removed and returned to the supply unit 20.

  The sliding portion 40 is erected on the bottom plate portion 41 for sliding the electrode 50 downward, and at both end edges in the horizontal width direction orthogonal to the inclination direction of the bottom plate portion 41 (that is, the sliding direction of the electrode 50). And a pair of side plate portions 42 extending. The bottom plate portion 41 has a sliding surface 41a for sliding the electrode 50 downward. The bottom plate portion 41 is inclined with respect to the horizontal direction so that the electrode 50 which is conveyed by the conveyance portion 30 and falls on the sliding surface 41a of the bottom plate portion 41 slides downward. The side plate portion 42 abuts on the electrode 50 that slides on the sliding surface 41a of the bottom plate portion 41, and guides the electrode 50 to a predetermined position in the width direction.

  As shown in FIGS. 4 and 5, the sliding unit 40 is fixed by a pair of frames F that support both sides of the transport unit 30 in the width direction, for example. Specifically, the sliding portion 40 is supported by the pair of frames F by connecting the upper ends of the pair of side plate portions 42 and the pair of frames F. As shown in FIG. 5, the sliding portion 40 may be rotatable about an axis L <b> 1 that extends in the width direction through the connecting portion between the side plate portion 42 and the frame F. According to this configuration, the inclination angle θ1 of the bottom plate portion 41 with respect to the horizontal direction can be adjusted.

  Further, the pair of side plate portions 42 are provided so that the width between the pair of side plate portions 42 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 drops away from the lower end portion of the bottom plate portion 41.

  As shown in FIGS. 4 and 6, two rectangular cutouts S <b> 1 and S <b> 2 that penetrate the bottom plate portion 41 in the thickness direction are provided at the lower end portion of the bottom plate portion 41. The notches S1 and S2 are formed above the lower edge 41b of the bottom plate 41 where the notches S1 and S2 are not provided. The notches S1 and S2 have substantially the same shape and size, and are spaced apart in the width direction. The notches S <b> 1 and S <b> 2 are line symmetric with respect to a center line extending in the inclination direction of the bottom plate portion 41. Here, three flat portions of the lower end portion of the bottom plate portion 41 that are not provided with the cutouts S1 and S2 are the electrode 50 (specifically, until the electrode 50 is dropped from the lower end portion of the bottom plate portion 41). The portion corresponding to the upper end portions of the metal foil main body portions 14a and 17a) can be supported.

  The notch S1 is provided at a position corresponding to the position in the width direction of the rectangular tab 14b of the positive electrode 10 with a separator in the width direction. Thereby, when the positive electrode with a separator 10 that slides on the sliding surface 41a of the bottom plate portion 41 with the tab 14b positioned on the upstream side falls from the lower end portion of the bottom plate portion 41, the tab 14b of the positive electrode with separator 10 is It will pass through the notch S1. Therefore, when the positive electrode with a separator 10 falls from the lower end portion of the bottom plate portion 41, the tab 14 b of the positive electrode with a separator 10 can be prevented from being caught by the lower end portion of the bottom plate portion 41.

  Here, the width (size in the width direction) of the notch S1 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 41) is the separator. When the height of the tab 14b of the positive electrode 10 with the separator is higher than the height of the tab 14b, the tab 14b of the positive electrode 10 with the separator is caught by the lower end of the bottom plate portion 41 when the positive electrode 10 with the separator falls from the lower end portion of the bottom plate portion 41. 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 a separator. Even in such a configuration, when the positive electrode with separator 10 falls from the lower end portion of the bottom plate portion 41, the time during which the tab 14b of the positive electrode with separator 10 is hooked on the lower end portion of the bottom plate portion 41 can be shortened. it can. Thereby, a deformation | transformation or damage of the tab 14b of the positive electrode 10 with a separator can be suppressed.

  The notch S2 is provided at a position corresponding to the position in the width direction of the rectangular tab 17b of the negative electrode 12 in the width direction. Thus, when the negative electrode 12 sliding on the sliding surface 41a of the bottom plate portion 41 with the tab 17b positioned on the upstream side falls from the lower end portion of the bottom plate portion 41, the tab 17b of the negative electrode 12 has the notch S2. Will pass. Therefore, it is possible to prevent the tab 17 b of the negative electrode 12 from being caught by the lower end portion of the bottom plate portion 41 when the negative electrode 12 falls from the lower end portion of the bottom plate portion 41.

  Here, when the width of the notch S2 is larger than the width of the tab 17b of the negative electrode 12 and the height of the notch S2 is higher than the height of the tab 17b of the negative electrode 12, the negative electrode 12 is formed on the bottom plate 41. When falling from the lower end, the tab 17b of the negative electrode 12 can be reliably prevented from being caught by the lower end of the bottom plate portion 41. However, the height of the notch S2 may be lower than the height of the tab 17b of the negative electrode 12. Even in such a configuration, when the negative electrode 12 falls from the lower end portion of the bottom plate portion 41, the time during which the state in which the tab 17b of the negative electrode 12 is hooked on the lower end portion of the bottom plate portion 41 can be shortened. Thereby, the deformation | transformation or damage of the tab 17b of the negative electrode 12 can be suppressed.

  With the above configuration, when a plurality of electrodes 50 (positive electrode 10 and negative electrode 12 with separators) having different tab positions are slid downward by one sliding portion 40, the tab of each electrode 50 is formed on the bottom plate portion 41 of the sliding portion 40. It is possible to prevent the bottom end from being caught. That is, the notches S1 and S2 function as tab tabs of the electrode 50. In addition, the edge part 41c in which notches S1 and S2 are formed in the lower end part of the baseplate part 41 may be made into the chamfered shape (for example, R shape). Thereby, the deformation | transformation or damage of the tab 14b when the tab 14b of the positive electrode 10 with a separator contacts the edge part 41c of notch S1 can be reduced. Similarly, deformation or damage of the tab 17b when the tab 17b of the negative electrode 12 contacts the edge 41c of the notch S2 can be reduced.

  As shown in FIG. 3, the sliding unit 40 is provided with an optical sensor 43. In the present embodiment, as an example, the optical sensor 43 is disposed on the back surface of the bottom plate portion 41. A through hole is formed in a portion of the bottom plate portion 41 where the optical sensor 43 is disposed. The optical sensor 43 detects a state where the through hole is blocked by the electrode 50 sliding on the sliding surface 41a, and outputs a detection signal indicating that the through hole is blocked to the control unit 90. Based on this detection signal, the control unit 90 counts the number of electrodes 50 that have slid on the sliding unit 40 and headed toward the stacked unit 60 (details will be described later).

  The stacked portion 60 is a portion where the electrodes 50 that fall from the sliding portion 40 are stacked. The stacking section 60 includes an electrode receiving section 70 that guides and stacks the electrodes 50 that fall from the bottom plate section 41 to a predetermined position, and a support section 80 that supports the electrode receiving section 70 so as to be movable. The electrode receiving part 70 has a bottom wall part 71, a stopper 72, a pair of side wall parts 73, and protruding wall parts 74 and 75.

  The bottom wall portion 71 is disposed below the lower end portion of the bottom plate portion 41 and is inclined with respect to the horizontal direction. The electrode 50 is placed on the bottom wall portion 71. Specifically, the separator-attached positive electrode 10 and the negative electrode 12 that are alternately conveyed by the conveyance unit 30 sequentially fall on the bottom wall portion 71 via the sliding unit 40. Thereby, on the bottom wall part 71, the laminated body X by which the positive electrode 10 with a separator and the negative electrode 12 were laminated | stacked alternately is formed. A stopper 72 is attached to the bottom wall portion 71. In addition, the stopper 72 may be attached to the bottom wall part 71 so that it can move to the inclination direction of the bottom wall part 71, for example.

  The stopper 72 is erected on the bottom wall portion 71 and extends in the width direction perpendicular to the inclination direction of the bottom wall portion 71, and the tab (tab 14 b or tab 17 b) of the electrode 50 placed on the bottom wall portion 71. The electrode 50 is stopped in contact with the end portion (the other end portion) on the side where no is provided. The stopper 72 functions as a guide for aligning the position of the lower end portion of the electrode 50 stacked on the bottom wall portion 71.

  The pair of side wall portions 73 are erected on both edge portions in the width direction of the bottom wall portion 71, extend in the inclination direction of the bottom wall portion 71, and are separated in a direction orthogonal to the inclination direction. It is. As shown in FIG. 6, the distance between the pair of side wall portions 73 is equal to or greater than the width of the electrode 50, and the upper end portions of the pair of side wall portions 73 approach the width of the electrode 50 as it goes downward in the inclined direction. A tapered portion 73a having a narrow interval is provided. On the lower end side of the tapered portion 73a in each side wall portion 73, a parallel portion 73b having a constant interval is continuously provided. Thus, since the taper part 73a is provided in the upper end part of a pair of side wall part 73, the electrode 50 which falls from the lower end part of the baseplate part 41 is first received by the wide part of the taper part 73a. And the electrode 50 is guided by the taper part 73a as it slides and goes below. This makes it possible to align the positions of the electrodes 50 in the width direction (width direction of the bottom wall portion 71).

  As shown in FIG. 5, the bottom wall portion from the contact surface 72a of the stopper 72 contacting the other end portion of the electrode 50 to the lower end edge 41b of the lower end portion of the bottom plate portion 41 where the notches S1 and S2 are not provided. The distance d1 in the inclination direction of 71 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, the sliding portion 40 and the electrode receiving portion 70 are arranged by utilizing the fact that the tab 14b and the tab 17b pass through the notches S1 and S2 when the electrode 50 falls from the lower end portion of the bottom plate portion 41, respectively. ing. That is, the distance d1 in the inclination direction of the bottom wall portion 71 from the contact surface 72a of the stopper 72 to the lower end edge 41b where the notches S1 and S2 are not provided in the lower end portion of the bottom plate portion 41 is the total length of the electrode 50 (the other The sliding portion 40 and the electrode receiving portion 70 are disposed so as to be shorter than the distance d2) from the end of the tab to the tip of the tab. Thereby, the position where the other end portion of the electrode 50 falling from the lower end portion of the bottom plate portion 41 contacts the upper surface of the bottom wall portion 71 of the electrode receiving portion 70 (or the electrode 50 already placed on the bottom wall portion 71). Can be as close to the contact surface 72a of the stopper 72 as possible. That is, the other end of the electrode 50 comes into contact with the upper surface of the bottom wall portion 71 of the electrode receiving portion 70 (or the electrode 50 already placed on the bottom wall portion 71), and then slides down to the contact surface 72a of the stopper 72. The distance can be shortened. Thereby, the impact which the electrode 50 receives when laminating | stacking the electrode 50 on the electrode receiving part 70 can be reduced, and generation | occurrence | production of the shift | offset | difference at the time of lamination | stacking and damage to the electrode 50 can be suppressed.

  In addition, the sliding portion 40 and the electrode receiving portion 70 are configured so that the electrode 50 that slides on the sliding surface 41 a of the bottom plate portion 41 falls from the lower end portion of the bottom plate portion 41 and lands on the bottom wall portion 71. May be arranged so as to contact at least one of the side plate portion 42 of the sliding portion 40 and the side wall portion 73 of the electrode receiving portion 70. More specifically, when the electrode 50 falls from the lower end portion of the bottom plate portion 41, it is possible to continuously shift from the state in which the electrode 50 is in contact with the side plate portion 42 to the state in which the electrode 50 is in contact with the bottom wall portion 71. As such, the sliding portion 40 and the electrode receiving portion 70 may be disposed close to each other. In this case, when the electrode 50 falls from the lower end portion of the bottom plate portion 41, the electrode 50 protrudes downward from the lower end portion of the bottom plate portion 41 in a state where a part of the upper side of the electrode 50 is in contact with the side plate portion 42. A part of the lower side of the contact portion comes into contact with the side wall portion 73 (for example, the tapered portion 73a described above). That is, it is possible to prevent the electrode 50 from floating in the air without contacting either the sliding part 40 or the electrode receiving part 70. Thereby, when the electrode 50 falls from the lower end part of the baseplate part 41, it can prevent appropriately that the position of the width direction of the electrode 50 shifts | deviates. 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 71 is provided with two protruding wall portions 74 and 75 that protrude upward in the inclination direction of the bottom wall portion 71. Further, the notches S1 and S2 described above are provided at positions corresponding to the protruding wall portions 74 and 75, respectively. In other words, notches S1 and S2 penetrating in the thickness direction of the bottom plate portion 41 are provided at the lower end portion of the bottom plate portion 41 at positions corresponding to the protruding wall portions 74 and 75. Accordingly, when the electrode receiving portion 70 is slid to take out the stacked body X of the electrodes 50 stacked on the bottom wall portion 71 by a mechanism described later, the protruding wall portion 74 provided on the bottom wall portion 71. , 75 can pass through the notches S1 and S2 provided at the lower end of the bottom plate portion 41. Thereby, in order to suppress the position shift, damage, etc. of the electrode 50 laminated | stacked on the bottom wall part 71, an electrode receiving part is obtained, without interfering with the sliding part 40, bringing the sliding part 40 and the electrode receiving part 70 as close as possible. 70 can be slid.

  One protruding wall portion 74 is provided at a position corresponding to the tab 14 b of the separator-attached positive electrode 10 in the width direction orthogonal to the inclination direction of the bottom wall portion 71. The other protruding wall portion 75 is provided at a position corresponding to the tab 17b of the negative electrode 12 in the width direction. Accordingly, the tabs of the electrode 50 are supported by the protruding wall portions 74 and 75 provided at positions corresponding to the tabs (tab 14b and tab 17b) of the electrode 50 that fall from the sliding portion 40 and are stacked on the bottom wall portion 71. can do. Thereby, it is possible to prevent the tab of the electrode 50 from protruding from the upper end portion of the bottom wall portion 71 and bending due to gravity.

  The positional relationship between the notches S1 and S2 and the projecting wall portions 74 and 75 will be described. The projecting wall portions 74 and 75 are disposed so as to overlap the notches S1 and S2 when viewed from the stacking direction of the electrodes 50. . As a result, when the tab 14b of the positive electrode with separator 10 falls to the bottom wall portion 71 through the notch S1 provided at the lower end portion of the bottom plate portion 41, the tab 14b of the positive electrode with separator 10 protrudes from the protruding wall portion 74. It will land at the position where is provided. Further, when the tab 17 b of the negative electrode 12 falls to the bottom wall portion 71 through the notch S <b> 2 provided at the lower end portion of the bottom plate portion 41, the tab 17 b of the negative electrode 12 lands on the protruding wall portion 75. Become. Thereby, the tab 14b of the positive electrode 10 with a separator or the tab 17b of the negative electrode 12 dropped from the lower end portion of the bottom plate portion 41 can be appropriately supported by the protruding wall portions 74 and 75.

  Further, as shown in FIG. 7, the protruding wall portions 74 and 75 are disposed so as to be accommodated in the notches S <b> 1 and S <b> 2 when viewed from the front. Thereby, when the electrode receiving part 70 is slid in the front-rear direction with respect to the sliding part 40, the protruding wall parts 74 and 75 provided at the upper end part of the bottom wall part 71 are located at the lower end part of the bottom plate part 41. It can pass through the notches S1 and S2 provided. Therefore, the movement of the electrode receiving portion 70 between the stacking position for stacking the electrode 50 on the electrode receiving portion 70 and the take-out position for taking out the stacked body X of the electrode 50 stacked on the electrode receiving portion 70, This can be easily performed by a uniaxial movement operation in the front-rear direction.

  As illustrated in FIG. 3, the stacked unit 60 includes a support unit 80 that supports the electrode receiving unit 70 in a movable manner. The support portion 80 includes a rail portion 81 that extends in the same direction (that is, the front-rear direction) as the horizontal component of the sliding direction in the sliding portion 40, and a sliding portion that supports the electrode receiving portion 70 and slides along the rail portion 81. 82, a toothed belt 83 laid in the front-rear direction along the rail portion 81, and a motor (driving means) 84 for driving the toothed belt 83.

  The toothed belt 83 is connected to the rail portion 81 and to the sliding portion 82. That is, the sliding portion 82 is connected to the rail portion 81 via the toothed belt 83. The toothed belt 83 is driven in the front-rear direction by the operation of the motor 84 controlled by the control unit 90. By driving the toothed belt 83 in the front-rear direction, the sliding portion 82 causes the electrode 50 falling from the bottom plate portion 41 to land on the electrode receiving portion 70 from the stacking position (first position) and the stacking position in the horizontal direction. Also, it is possible to slide between the take-out position (second position) away from the bottom plate portion 41. As shown in FIG. 3, as an example in the present embodiment, the stacking position is a position where the sliding portion 40 and the electrode receiving portion 70 overlap (overlap) in the vertical direction. The take-out position is ahead of the stacking position and is a position where the sliding portion 40 and the electrode receiving portion 70 do not overlap in the vertical direction.

  The control unit 90 is a part that controls the operation of the supply unit 20, the transport unit 30, and the stacking unit 60, and includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), a hard disk, and the like. Composed. Specifically, the control unit 90 controls these operations by transmitting a control signal instructing start and stop of the operation to the supply unit 20, the drive unit 31 of the transport unit 30, and the motor 84. To do. The control signal may include information on the operation direction and speed. Hereinafter, the contents of control of the control unit 90 will be described along the flow of processing in the stacking process.

  At the start of stacking, the control unit 90 causes the motor 84 to drive the toothed belt 83 and sets the electrode receiving unit 70 at the stacking position. Subsequently, the control unit 90 controls the operation of the supply unit 20 to start the supply of the electrode 50 and causes the drive unit 31 to drive the transport unit 30. Thereby, the electrodes 50 (the positive electrode 10 with the separator and the negative electrode 12) are alternately transferred from the supply unit 20 to the conveyance unit 30 and are conveyed toward the sliding unit 40 by the conveyance unit 30.

  Subsequently, the optical sensor 43 provided in the sliding portion 40 detects the state where the through hole is blocked by the electrode 50 sliding on the sliding surface 41a, and indicates that the through hole is blocked. The signal is output to the control unit 90. Based on the detection signal, the control unit 90 detects (counts) the number of electrodes 50 that have slid on the sliding surface 41a (that is, the number of electrodes 50 stacked on the electrode receiving unit 70). When the control unit 90 detects that the number of the electrodes 50 stacked on the electrode receiving unit 70 has reached a predetermined number, the control unit 90 stops the operation of the driving unit 31 of the supply unit 20 and the conveyance unit 30. In addition, the control unit 90 controls the operation of the motor 84 to drive the toothed belt 83 and advance the sliding unit 82 and the electrode receiving unit 70 from the stacking position to the extraction position.

  The laminated body X on the electrode receiving portion 70 is transferred to the next process at the take-out position. Delivery of the laminated body X to the next process may be performed in units of the laminated body X, or may be performed in units of the electrode receiving unit 70. That is, only the laminated body X may be delivered, or the electrode receiving part 70 and the laminated body X may be collectively delivered to the next process by separating the electrode receiving part 70 from the sliding part 82. . When the power storage device 1 is a lithium ion secondary battery, the control unit 90 controls the electrode dispensing means provided at the front end of the transport unit 30 in order to generate the next stacked body X. Specifically, when the electrode 50 at the front end of the transport unit 30 is the positive electrode 10 with a separator, the control unit 90 removes the positive electrode 10 with the separator and returns the electrode so as to return to the supply unit 20. Activate the means. Thereby, the leading electrode 50 of the transport unit 30 can be set to the negative electrode 12. Thus, the control of one stacking process (a processing unit for transferring one stacked body X to the next process) is completed. The control by the control unit 90 is repeatedly executed for the number of stacked bodies X that need to be generated.

  As described above, according to the electrode stacking apparatus 100 of the first embodiment, the electrode receiving unit 70 is stacked by the support unit 80 for landing the electrode 50 falling from the bottom plate 41 on the electrode receiving unit 70. And in the horizontal direction, it is supported so as to be movable between an extraction position farther from the bottom plate portion 41 than a stacking position. Therefore, when the electrode 50 is stacked on the electrode receiving portion 70, the electrode receiving portion 70 is supported at the stacking position, and when the electrode 50 stacked on the electrode receiving portion 70 is taken out, the electrode receiving portion 70 is removed. It can be moved and supported. Thereby, the electrode 50 (laminated body X) laminated | stacked on the electrode receiving part 70 can be taken out easily irrespective of arrangement | positioning of the sliding part 40 and the electrode receiving part 70. FIG.

  The movement of the electrode receiving portion 70 by the rail portion 81 extending in the same direction as the horizontal component of the sliding direction in the sliding portion 40 and the sliding portion 82 that supports the electrode receiving portion 70 and slides along the rail portion 81. Can be a sliding movement along the same direction as the horizontal component of the sliding direction in the sliding portion 40, that is, the direction perpendicular to the width direction of the electrode 50 stacked on the electrode receiving portion 70. Thereby, it can suppress that the position of the electrode 50 (each electrode 50 which forms the laminated body X) laminated | stacked on the electrode receiving part 70 shifts | deviates by the movement of the electrode receiving part 70. FIG. Moreover, since the rail part 81 becomes a structure extended in the same direction as the horizontal direction component of the sliding direction of the sliding part 40, the dispersion | variation in the width direction in the structure of the electrode lamination apparatus 100 whole can be suppressed, and apparatus compactization is possible. Can be planned.

  Further, according to the electrode stacking apparatus 100, when the number of the electrodes 50 stacked on the electrode receiving unit 70 reaches a predetermined number by the control unit 90, the electrode receiving unit 70 is moved from the stacking position to the take-out position. It can be moved automatically. That is, when the lamination process of laminating the electrode 50 on the electrode receiving part 70 is completed, the electrode receiving part 70 can be automatically moved to the take-out position for delivering the electrode 50 (laminated body X) to the next process. Therefore, workability can be improved.

  Further, according to this electrode stacking apparatus 100, the notches S <b> 1 and S <b> 2 that penetrate in the thickness direction of the bottom plate portion 41 are provided at the lower end portion of the bottom plate portion 41, so When falling, the tab (tab 14b or tab 17b) of the electrode 50 can pass through the notches S1 and S2. Thereby, it is possible to suppress the tab from being caught by the lower end portion of the bottom plate portion 41 when the electrode 50 is dropped. Therefore, when the sheet-like electrode 50 having a tab is dropped and stacked, the deformation or damage of the tab can be suppressed.

  The electrode stacking apparatus according to the second embodiment will be described with reference to FIG. FIG. 8 is a diagram schematically illustrating the overall configuration of the electrode stacking apparatus according to the second embodiment. As shown in FIG. 8, in the electrode stacking apparatus 200 of the second embodiment, the sliding portion 40 is provided below the sliding portion (first sliding portion) 40A and the sliding portion (second sliding portion) 40A. It is mainly different from the electrode lamination apparatus 100 of 1st Embodiment by having the sliding part 40B.

  As shown in FIG. 8, in the system including the electrode stacking apparatus 200 of the second embodiment, the transport unit 30 is divided into a transport unit 30 </ b> A that transports the positive electrode with separator 10 and a transport unit 30 </ b> B that transports the negative electrode 12. . The sliding portion 40A includes a bottom plate portion (first bottom plate portion) 41A that is inclined with respect to the horizontal direction so that the separator-equipped positive electrode 10 conveyed by the conveyance portion 30A slides downward. The sliding portion 40B has a bottom plate portion (second bottom plate portion) 41B that is inclined with respect to the horizontal direction so as to slide the negative electrode 12 conveyed by the conveyance portion 30B downward.

  At the lower end portion of the bottom plate portion 41A of the sliding portion 40A, a notch (first notch) S1 penetrating in the thickness direction of the bottom plate portion 41A is provided at a position corresponding to the tab 14b of the positive electrode with separator 10 in the width direction. Is provided. At the lower end of the bottom plate portion 41B of the sliding portion 40B, a notch penetrating in the plate thickness direction of the bottom plate portion 41B 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 (second Notches) S1 and S2.

  In the electrode laminating apparatus 200 of the second embodiment, when the positive electrode 10 with a separator that slides on the bottom plate portion 41A with one end portion positioned upward falls from the lower end portion of the bottom plate portion 41A, the positive electrode 10 with a separator. The tab 14b passes through the notch S1 provided at the lower end portion of the bottom plate portion 41A. Further, when the negative electrode 12 that slides on the bottom plate portion 41B with one end positioned upward falls from the lower end portion of the bottom plate portion 41B, the tab 17b of the negative electrode 12 is cut off on the cut plate provided on the bottom plate portion 41B. It will pass through the notch S2. Moreover, since the notch S1 corresponding to the tab 14b of the separator-attached positive electrode 10 is also provided in the bottom plate portion 41B, the separator-attached positive electrode dropped from the lower end portion of the bottom plate portion 41A provided above the bottom plate portion 41B. The ten tabs 14b can pass through the notches S1 provided in the bottom plate portion 41B. Thereby, when each of the plurality of electrodes 50 having different tab positions is slid downward by the plurality of upper and lower stages of the sliding portions 40A and 40B, the tab of each electrode 50 is the bottom plate portion 41A of each of the sliding portions 40A and 40B. It can prevent being caught by the lower end part of 41B.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, 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 position and shape of the protruding wall portion of the stacked portion are not limited to the position and shape of the protruding wall portions 74 and 75 shown in the above embodiment.

  FIG. 9 shows a modification of the notch and the protruding wall portion. In the example of (a) of FIG. 9, the notch S <b> 3 has a concave shape formed by greatly hollowing out the central portion in the width direction of the lower end portion of the bottom plate portion 41. One protruding wall portion 76 is formed at the central portion in the width direction of the upper end portion of the bottom wall portion 71 corresponding to one notch S3. According to such a configuration, only one cutout S3 and one protruding wall portion 76 need be provided. Therefore, the bottom plate portion 41 is provided with the cutout S3 and the bottom wall portion 71 is provided with the protruding wall portion 76. Can be easily performed.

  In the example of FIG. 9B, the notches S4 and S5 are formed at both edge portions in the width direction of the lower end portion of the bottom plate portion 41. Thereby, the shape of the lower end part of the baseplate part 41 is convex shape. Corresponding to the notches S4 and S5, projecting wall portions 77 and 78 are formed at both end portions in the width direction of the upper end portion of the bottom wall portion 71, respectively. Providing such notches S4 and S5 and protruding wall portions 77 and 78 appropriately copes with the case where the tab positions of the electrode 50 stacked on the electrode receiving portion 70 are located at both ends in the width direction. be able to.

  Moreover, although the case where the two types of the positive electrode 10 with a separator and the negative electrode 12 existed as the electrode 50 of lamination | stacking in the said embodiment, the kind of electrode 50 of lamination | stacking object is not restricted to this. For example, a separator may be sandwiched between the positive electrode 11 and the negative electrode 12 in the stacking step. In this case, the positive electrode 11, the negative electrode 12, and the separator 13 may be stacked in the order of the positive electrode 11, the separator 13, the negative electrode 12, the separator 13, the positive electrode, and so on.

  FIG. 10 shows a modification of the bottom wall portion. As shown in FIG. 10, the electrode stacking apparatus may include an electrode receiving portion 70 </ b> B having a configuration in which the protruding wall portion is not provided on the bottom wall portion 71 in place of the electrode receiving portion 70 described above. That is, the upper end of the bottom wall portion 71 may be flat (on a straight line). In this case, the stacked body X may be formed on the bottom wall portion 71 such that the tabs 14 b and 17 b of the electrode 50 protrude from the upper end of the bottom wall portion 71.

  DESCRIPTION OF SYMBOLS 1 ... Power storage device, 3 ... Electrode assembly, 10 ... Positive electrode with separator, 11 ... Positive electrode, 12 ... Negative electrode, 13 ... Separator, 14 ... Metal foil, 14b ... Tab, 17 ... Metal foil, 17b ... Tab, 20 ... Supply Part, 30 ... conveying part, 40, 40A, 40B ... sliding part, 41, 41A, 41B ... bottom plate part, 41a ... sliding surface, 41b ... lower end edge, 42 ... side plate part, 43 ... optical sensor, 50 ... electrode, 60 ... Laminated part, 70 ... Electrode receiving part, 71 ... Bottom wall part, 72 ... Stopper, 72a ... Contact surface, 73 ... Side wall part, 73a ... Tapered part, 73b ... Parallel part, 74, 75, 76, 77, 78 ... Projection wall part, 80 ... support part, 81 ... rail part, 82 ... sliding part, 84 ... motor (driving means), 90 ... control part, 100,200 ... electrode stacking apparatus, S1-S5 ... notch.

Claims (7)

An electrode laminating apparatus for laminating a plurality of sheet-like electrodes,
A sliding portion having a bottom plate portion inclined with respect to a horizontal direction so as to slide the electrode downward;
A laminated part that laminates the electrodes falling from the sliding part,
The laminated portion is
An electrode receiving portion for guiding and laminating the electrode falling from the bottom plate portion to a predetermined position;
Between the first position for landing the electrode falling from the bottom plate portion on the electrode receiving portion and the second position farther from the bottom plate portion than the first position in the horizontal direction, A support part that movably supports the receiving part,
Electrode stacking device. The support part is
A rail portion extending in the same direction as the horizontal component of the sliding direction in the sliding portion;
A sliding part that supports the electrode receiving part and slides along the rail part,
The electrode lamination apparatus according to claim 1. The number of the electrodes stacked on the electrode receiving portion is detected, and when the number of the detected electrodes reaches a predetermined number, the electrode receiving portion is moved from the first position to the second position. Further comprising a control unit to be moved to
The electrode lamination apparatus according to claim 1 or 2. The electrode receiving portion is disposed below a lower end portion of the bottom plate portion and is inclined with respect to a horizontal direction, and has a bottom wall portion on which the electrode is placed, and an upper end portion of the bottom wall portion includes: A protruding wall portion protruding upward in the inclination direction of the bottom wall portion is provided,
At the lower end portion of the bottom plate portion, a notch penetrating in the thickness direction of the bottom plate portion is provided at a position corresponding to the protruding wall portion.
The electrode lamination apparatus as described in any one of Claims 1-3. A protrusion is provided at one end of the electrode,
The protruding wall portion is provided at a position corresponding to the protruding portion in the width direction orthogonal to the inclination direction of the bottom wall portion.
The electrode lamination apparatus according to claim 4. The protruding wall portion is disposed so as to overlap the notch when viewed from the stacking direction of the electrodes.
The electrode stacking apparatus according to claim 5. The protruding wall portion is disposed so as to be accommodated in the notch as viewed from the front.
The electrode lamination apparatus as described in any one of Claims 4-6.

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