JP6589344B2 - Electrode laminating apparatus and electrode laminating method - Google Patents

Description

  The present invention relates to an electrode stacking apparatus and an electrode stacking method.

  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

  Here, when the sheet-like electrode is naturally dropped from the discharge part of the drop moving means and laminated on the guide laminating means as in the above apparatus, the height of the laminate in the laminating direction is increased as the electrodes are successively laminated. (Ie stacking height) increases. Thereby, there is a possibility that a problem may occur at the time of stacking. The defect is, for example, damage near the upper end of the electrode forming the laminated body. By the way, as described in Patent Document 1, when using the discharge unit of the drop moving means and the guide stacking means, it is more advantageous to have a close positional relationship so as to substantially overlap in the vertical direction. If the electrode is in the air for a long time, the air flow due to the surrounding environment may affect the dropping posture of the electrode, which may cause a positional shift, while the distance between the discharge part of the drop moving means and the guide stacking means may be increased. This is because the influence can be suppressed by shortening.

  However, as shown in FIG. 8, when the distance between the discharge portion 201 a of the drop moving means 201 and the guide stacking means 202 is shortened, when the stacking height h of the electrodes 203 is increased, the falling electrode 203 is not stacked. It becomes easy to land near the upper end of the uppermost electrode. In particular, when an uncoated tab 203a is provided on the upper end portion of the electrode 203, the lower end portion of the falling electrode 203 is landed on the upper surface of the tab 203a of the electrode 203 in the uppermost layer of the laminate X, and the tab 203a is There is a risk of problems such as bending.

  An object of the present invention is to provide an electrode laminating apparatus and an electrode laminating method capable of suppressing the occurrence of problems associated with an increase in the electrode stacking height when dropping and laminating sheet-like electrodes. .

  An electrode stacking apparatus according to an aspect of the present invention is an electrode stacking apparatus that stacks a plurality of sheet-like electrodes, and includes a sliding portion that is inclined with respect to the horizontal direction so that the electrodes slide downward, and a lower end of the sliding portion. A bottom wall portion disposed below the bottom portion and inclined with respect to the horizontal direction, on which an electrode falling from the lower end portion of the sliding portion is placed, and extending in a direction perpendicular to the inclination direction of the bottom wall portion, An electrode receiving portion having a stopper that contacts the electrode placed on the wall portion and stops the electrode, and the electrode so that the bottom wall portion is separated from the lower end portion of the sliding portion as the stacked height of the electrode increases. A control unit that moves the receiving unit.

  In this electrode laminating apparatus, an electrode falling from the lower end portion of the sliding portion is laminated on the bottom wall portion of the electrode receiving portion, whereby an electrode laminate is formed. Here, as the electrodes are stacked in the electrode receiving portion, the stack height of the stacked body formed on the bottom wall portion increases. Thereby, the electrode falling from the lower end portion of the sliding portion can easily land near the upper end portion of the uppermost electrode of the laminate. According to this electrode laminating apparatus, the control unit moves the electrode receiving portion so that the bottom wall portion is separated from the lower end portion of the sliding portion in accordance with an increase in the laminating height of the laminated body. Even if the height is increased, the falling electrode is prevented from landing near the upper end of the uppermost electrode of the laminate. Therefore, it is possible to suppress the occurrence of problems associated with an increase in the stacked height of the electrodes.

  In the above electrode stacking apparatus, the bottom wall portion intersects a virtual plane along the sliding surface of the sliding portion and a portion above the stopper of the bottom wall portion or the upper surface of the electrode placed on the bottom wall portion. It may be arranged to do.

  For example, it is possible to stack the electrodes by changing the conditions (speed, angle, etc.) of the electrode falling from the sliding portion so that the electrode collides with the stopper and falls on the bottom wall portion. However, in this case, the following event may occur. FIG. 9 is a diagram illustrating an example of electrode stacking of the electrode stacking apparatus of the comparative example. As shown in FIG. 9A, when the electrode 203 collides with the stopper 204 of the guide laminating means 202 at an angle close to perpendicular, the electrode 203 rebounds strongly, and the lower end of the electrode 203 abuts against the stopper 204. There is a possibility that the electrode 203 cannot be stacked at an appropriate position in contact. Further, as shown in FIG. 9B, the lower end of the electrode 203 falls along the stopper 204, stops in a state where the lower end of the electrode 203 is caught by the stopper 204, and the electrode 203 is laminated obliquely. There is a fear.

  According to the electrode stacking apparatus, since the sliding portion and the bottom wall portion of the electrode receiving portion have the above-described positional relationship, even when the speed of the electrode falling from the sliding portion is high, the electrode is first of the electrode receiving portion. After landing on the upper portion of the bottom wall stopper or on the upper surface of the laminated body placed on the bottom wall, it slides down and stops at the stopper. Therefore, the occurrence of the event illustrated in FIG. 9 can be suppressed. Furthermore, as the electrode stacking progresses, the distance to which the electrode slides changes, but as the electrode stacking height increases, the electrode receiving part moves so that the bottom wall part moves away from the lower end part of the sliding part. The change of the distance that the part slides down is suppressed, and the displacement of the electrode can be suppressed.

  In the above electrode stacking apparatus, the control unit may move the electrode receiving unit along a predetermined uniaxial direction.

  According to this electrode stacking apparatus, since the electrode receiving part moves along a predetermined uniaxial direction, the moving mechanism of the electrode receiving part can be simplified.

  In the electrode laminating apparatus, the direction in which the electrode receiving portion is moved in order to take out the electrode laminated on the electrode receiving portion may be along the uniaxial direction.

  According to this electrode stacking apparatus, it is possible to realize the movement for suppressing the positional deviation of the electrode due to the increase in the stacking height of the electrodes by the movement by the uniaxial moving mechanism, and further realize the movement for taking out the electrodes. be able to. Thereby, it is not necessary to provide a separate moving mechanism for each of the movement for suppressing the positional deviation of the electrode and the movement for taking out the electrode, so that the movement mechanism of the electrode receiving portion can be further simplified.

  In the above electrode laminating apparatus, the control unit is configured such that the bottom between the landing position where the electrode first contacts the upper surface of the laminate formed on the electrode receiving part or the bottom wall and the contact surface where the stopper contacts the electrode. The electrode receiving portion may be moved so that the distance along the inclination direction of the wall portion is equal to or less than a predetermined reference value.

  According to this electrode laminating apparatus, the electrode receiving portion can be moved so that the distance that the electrode slides to the stopper position after landing on the electrode receiving portion or the upper surface of the laminated body is equal to or less than a predetermined reference value. it can. Thereby, the position shift of the electrode accompanying the increase in the lamination | stacking height of an electrode can be suppressed more effectively.

  The electrode stacking method according to one aspect of the present invention includes a sliding portion that is inclined with respect to the horizontal direction so that the sheet-like electrode is slid downward, and is disposed below the lower end portion of the sliding portion and is horizontal with respect to the horizontal direction. The bottom wall portion on which the electrode that is inclined and falls from the lower end of the sliding portion is placed, and extends in a direction orthogonal to the inclination direction of the bottom wall portion, and contacts the electrode placed on the bottom wall portion. An electrode laminating method using an electrode laminating apparatus comprising an electrode receiving portion having a stopper for stopping an electrode, wherein the bottom wall portion is separated from the lower end portion of the sliding portion as the electrode laminating height increases. In addition, a movement control step of moving the electrode receiving portion is included.

  According to this electrode stacking method, in the movement control step, the electrode receiving portion is moved so that the bottom wall portion is separated from the lower end portion of the sliding portion as the electrode stack height increases, so that the stack height of the stacked body is increased. Is increased, the falling electrode is prevented from landing near the upper end of the uppermost electrode of the laminate. Therefore, it is possible to suppress the occurrence of problems associated with an increase in the stacked height of the electrodes.

  According to the present invention, when a sheet-like electrode is dropped and stacked, the occurrence of problems associated with an increase in the stacked height of the electrodes can be suppressed.

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 this embodiment. It is a figure for demonstrating the movement control of an electrode receiving part. It is a reference figure which shows the case where an electrode is laminated | stacked with the electrode lamination apparatus of a comparative example. It is a figure which shows a part of modification of a laminated part. It is a figure which shows a part of modification of a laminated part. It is a side view of the electrode lamination apparatus of a comparative example. It is a figure which shows the example of lamination | stacking of the electrode of the electrode lamination apparatus of 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 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 14b is formed on the upper edge 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 17b is formed on the upper edge portion of the main body portion 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. Note that the width in the left-right direction of the bag-like separator 13 used in the electrode stacking apparatus 100 (see FIG. 3) according to the present embodiment is the same as the width of the negative electrode 12.

  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 present 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.

  Subsequently, the electrode stacking apparatus 100 of the present embodiment will be described with reference to FIG. FIG. 3 is a diagram schematically illustrating the overall configuration of the electrode stacking apparatus 100. As shown in FIG. 3, the electrode laminating apparatus 100 is an apparatus for alternately laminating the positive electrode 10 with a separator and the negative electrode 12 as a sheet-like body, which is used in the above laminating process. In the following description, the negative electrode 12 and the positive electrode 10 with a separator are collectively referred to as an electrode 50.

  The electrode stacking apparatus 100 includes, as main components, a supply unit 20 that supplies the electrodes 50 (the positive electrode 10 with the separator and the negative electrode 12), a conveyance unit 30 that conveys the electrodes 50 supplied by the supply unit 20, and a conveyance unit. 30 controls the operation of the sliding unit 40 that slides the electrode 50 transported downward by 30, the stacking unit 60 that stacks the electrode 50 falling from the sliding unit 40, the supply unit 20, the transporting unit 30, and the stacking unit 60. And a control unit 90.

  The electrode 50 is stacked as follows to form the stacked body X on the stacked 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 inclined with respect to the horizontal direction so as to slide the electrode 50 downward. In this embodiment, as an example, the sliding portion 40 includes a bottom plate portion 41 that slides the electrode 50 downward, and a pair of side plate portions 42 that extend in the inclination direction of the bottom plate portion 41 (that is, the sliding direction of the electrode 50). Have. The side plate portions 42 are erected at both edge portions in the horizontal width direction orthogonal to the inclination direction of the bottom plate portion 41. The bottom plate portion 41 has a sliding surface 41a for sliding the electrode 50 downward. The bottom plate part 41 is inclined with respect to the horizontal direction so that the electrode 50 dropped from the transport unit 30 onto the sliding surface 41a of the bottom plate part 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 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. The optical sensor 43 may be disposed above the sliding surface 41 a or the conveyance unit 30 so as to face the sliding surface 41 a or the conveyance unit 30. In this case, for example, the optical sensor 43 irradiates light on the sliding surface 41a or the conveyance unit 30, receives light reflected on the sliding surface 41a or the conveyance unit 30, and detects a color based on the received light. Also good. The optical sensor 43 outputs a detection signal indicating the detected color to the control unit 90, and the control unit 90 detects the number of electrodes 50 that have slid on the sliding surface 41a based on the detection signal. Good. Specifically, by making the color of the main body portions 14a and 17a of the electrode 50 different from the color of the sliding surface 41a or the conveyance unit 30, the control unit 90 can determine whether the electrode 50 is based on the color indicated by the detection signal. It can be detected that the vehicle has passed the sliding surface 41a or the conveyance unit 30.

  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 portion 70 is disposed below the lower end portion (lower end portion of the sliding portion) P of the bottom plate portion 41 and is inclined with respect to the horizontal direction, and the bottom wall portion 71 is erected on the bottom wall portion 71. And a stopper 72 extending in a direction orthogonal to the inclination direction of the portion 71. On the bottom wall portion 71, the electrode 50 that falls from the lower end portion P of the bottom plate portion 41 is placed. The stopper 72 comes into contact with the electrode 50 placed on the bottom wall 71 and stops the electrode 50. Further, the electrode receiving part 70 has a pair of side wall parts 73 erected on both edge parts in the width direction of the bottom wall part 71. The pair of side wall portions 73 extends in the inclination direction of the bottom wall portion 71 and is separated in a direction orthogonal to the inclination direction.

  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 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. As shown in FIG. 3, the inclination angle with respect to the horizontal direction of the bottom wall portion 71 is equal to or less than the inclination angle with respect to the horizontal direction of the bottom plate portion 41. When the inclination angle of the bottom wall portion 71 is smaller than the inclination angle of the bottom plate portion 41, a virtual plane along the sliding surface 41 a of the sliding portion 40 and a portion above the stopper 72 of the bottom wall portion 71, or the bottom It arrange | positions so that the upper surface (upper surface of the laminated body X) of the electrode 50 mounted on the wall part 71 may cross | intersect.

  The stopper 72 comes into contact with the lower end of the contact surface 72a where the tab (tab 14b or tab 17b) of the electrode 50 placed on the bottom wall portion 71 is not provided, and stops the electrode 50. 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 with the contact surface 72a.

  The interval between the pair of side wall portions 73 is, for example, equal to or greater than the width of the electrode 50, and the upper end portion of the pair of side wall portions 73 is narrowed so as to approach the width of the electrode 50 as it goes downward in the tilt direction. A non-tapered taper is provided. On the lower end side of the tapered portion in each side wall portion 73, a parallel portion (not shown) having a constant interval is continuously provided. Thus, since the taper part 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 a taper part. The electrode 50 is guided by the tapered portion as it slides and moves downward. 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 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 that extends across the rail portion 81 in the front-rear direction, and a motor 84 that drives 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 is further away from the bottom plate portion 41 than in the stacking position in the horizontal position and the stacking position for landing the electrode 50 falling from the bottom plate portion 41 on the electrode receiving portion 70. It is possible to slide between the take-out positions. 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 bottom plate portion 41 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).

  The control unit 90 calculates the stacking height of the stacked body X from the detected number of electrodes 50. For example, the control unit 90 can calculate the stack height of the stacked body X by multiplying the preset average thickness per electrode by the number of detected electrodes 50. The control unit 90 controls the operation of the motor 84 based on the calculated stacking height of the stacked body X, thereby driving the toothed belt 83 and moving the sliding unit 82 and the electrode receiving unit 70 in the front-rear direction. Let Specifically, the control unit 90 moves the electrode receiving portion 70 so that the bottom wall portion 71 is separated from the lower end portion P of the bottom plate portion 41 as the stacked height of the stacked body X increases. In addition, the timing etc. which move the electrode receiving part 70 by the control part 90 can be defined arbitrarily. For example, the control unit 90 may move the electrode receiving unit 70 by a predetermined distance each time the number of the electrodes 50 forming the stacked body X increases by one, or each time the electrode 50 increases by a plurality of predetermined units. The electrode receiving part 70 may be moved by a predetermined distance. Further, the control unit 90 may move the electrode receiving unit 70 stepwise as described above, or may move the electrode receiving unit 70 continuously at a predetermined speed.

  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. In order to enable such movement, the sliding portion 40 and the electrode receiving portion 70 are configured such that the sliding portion 40 (the lower end portion of the bottom plate portion 41) and the electrode receiving portion 70 (the upper end portion of the bottom wall portion 71) are mutually connected. They are arranged in a positional relationship that does not interfere.

  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.

  Next, the movement of the electrode receiver 70 by the controller 90 will be described in detail with reference to FIG. 4A and 4B are views of the sliding portion 40 and the electrode receiving portion 70 as viewed from the side, and the illustration of the side wall portion 73 on the near side of the pair of side wall portions 73 is omitted. 4A and 4B, the Y-axis direction indicates the inclination direction of the bottom wall 71, and the Z-axis direction indicates the stacking direction of the stacked body X.

  As shown in FIG. 4, the control unit 90 moves the electrode receiving portion 70 so that the bottom wall portion 71 is separated from the lower end portion of the bottom plate portion 41 as the stacking height of the stacked body X increases. This will be specifically described below. 4A shows the sliding portion 40 and the electrode receiving portion 70 when the first electrode 50 (that is, the electrode 50 forming the lowermost layer of the stacked body X) is stacked on the electrode receiving portion 70 (initial state). The positional relationship of is shown. FIG. 4B shows the positional relationship between the sliding portion 40 and the electrode receiving portion 70 when the stacking of the electrodes 50 has progressed to some extent from the initial state. Hereinafter, the process of forming the stacked body X will be described, and the movement control of the electrode receiving unit 70 by the control unit 90 will be described.

  First, the first electrode 50 moved from the transport unit 30 to the bottom plate portion 41 slides on the sliding surface 41 a of the bottom plate portion 41 and falls from the lower end portion P of the bottom plate portion 41. As shown in FIG. 4A, the lower end portion of the first electrode 50 that has dropped from the lower end portion P of the bottom plate portion 41 lands at the landing position P <b> 1 on the upper surface of the bottom wall portion 71. Here, the landing position P <b> 1 is a position where the first electrode 50 falling from the lower end portion P of the bottom plate portion 41 first contacts the upper surface of the bottom wall portion 71. The first electrode 50 that has landed at the landing position P <b> 1 slides on the bottom wall portion 71 until reaching the position where the lower end portion contacts the contact surface 72 a of the stopper 72. The sliding distance d1 at this time is a distance along the inclination direction of the bottom wall portion 71 between the landing position P1 and the contact surface 72a of the stopper 72. The sliding distance d1 is less than a reference value dy described later.

  As the stacking of the electrodes 50 in the electrode receiving portion 70 proceeds, the stacking height of the stacked body X formed on the bottom wall portion 71 increases. Therefore, as illustrated in FIG. 4B, the control unit 90 includes the electrode receiving unit 70 such that the bottom wall portion 71 is separated from the lower end portion P of the bottom plate portion 41 as the stacking height of the stacked body X increases. Move. In FIG. 4B, P2 indicates the landing position of the electrode 50 at the time shown in FIG. Moreover, a broken line shows the position of the electrode receiving part 70 in an initial state.

  Specifically, as described above, the control unit 90 moves the electrode receiving unit 70 backward based on the calculated stacking height of the stacked body X. As a result, the bottom wall portion 71 is separated from the lower end portion P of the bottom plate portion 41. More specifically, the control unit 90 moves the electrode receiving unit 70 rearward so that the sliding distance d2 of the electrode 50 dropped on the electrode receiving unit 70 is equal to or less than a predetermined reference value dy. Here, the reference value dy is a value set from the viewpoint of avoiding damage and displacement of the electrode 50.

  For example, if the lower end portion of the electrode 50 falling from the lower end portion P of the bottom plate portion 41 lands on the tab (tab 14b or tab 17b) of the electrode 50 that forms the uppermost layer of the laminate X, the tab is damaged by impact. There is a risk. From the viewpoint of avoiding such damage to the tab, the reference value dy may be set to a value smaller than the height of the main body portion (main body portion 14a or main body portion 17a) of the electrode 50. The reference value dy may be set to be less than or equal to half the height of the main body (the main body 14a or the main body 17a) of the electrode 50. Moreover, when the sliding distance of the electrode 50 increases, the impact when the electrode 50 contacts the contact surface 72a of the stopper 72 increases. For this reason, the electrode 50 bounces off at the contact surface 72a, and there is a possibility that a position shift in which the lower end portion of the electrode 50 does not align with the contact surface 72a may occur. From the viewpoint of preventing such misalignment, the reference value dy may be set to a running distance (running distance obtained by prior verification, simulation, or the like) in which the probability that such misalignment occurs falls within a threshold value, for example. Good.

  FIG. 5 is a reference diagram illustrating a case where the electrodes 50 are stacked by the electrode stacking apparatus of the comparative example that does not include the mechanism for moving the electrode receiving portion 70 as described above. In the electrode stacking apparatus of the comparative example shown in FIG. 5, the relative position of the electrode receiving portion 70 with respect to the sliding portion 40 does not change during the stacking of the electrodes 50 as in the electrode stacking apparatus 100 of the present embodiment. For this reason, when the stacking height of the stacked body X increases, the distance from the lower end portion P of the bottom plate portion 41 to the upper surface of the stacked body X decreases. Therefore, the landing position where the electrode 50 falling from the lower end portion P of the bottom plate portion 41 first contacts the electrode receiving portion 70 or the stacked body X moves away from the stopper 72 as the stacking height increases. If the landing position moves in this way, the sliding distance that the electrode 50 slides to the contact surface 72a of the stopper 72 after landing on the electrode receiving portion 70 increases, and there is a high possibility that the displacement of the electrode 50 will occur. Become. On the other hand, as described above, according to the electrode stacking apparatus 100 according to the present embodiment, it is possible to suppress such positional deviation of the electrode 50.

  As described above, in the electrode stacking apparatus 100 according to this embodiment, the electrode 50 falling from the lower end portion P of the bottom plate portion 41 is stacked on the bottom wall portion 71 of the electrode receiving portion 70, thereby The stacked body X is formed. Here, as stacking of the electrodes 50 in the electrode receiving portion 70 proceeds, the stacking height of the stacked body X formed on the bottom wall portion 71 increases. According to the electrode stacking apparatus 100, the control unit 90 moves the electrode receiving unit 70 so that the bottom wall portion 71 is separated from the lower end portion P of the bottom plate portion 41 as the stacking height of the stacked body X increases. Thus, even when the stacking height of the stacked body X increases, the falling electrode 50 is prevented from landing near the upper end of the uppermost electrode 50 of the stacked body X. Therefore, it is possible to suppress the occurrence of problems (for example, damage to the tabs 14b and 17b of the electrode 50) accompanying the increase in the stacking height of the electrode 50.

  Further, in the electrode stacking apparatus 100, the bottom wall portion 71 is placed on a virtual plane along the sliding surface 41 a of the sliding portion 40 and a portion above the stopper 72 of the bottom wall portion 71 or on the bottom wall portion 71. It arrange | positions so that the upper surface of the laminated body X made may cross | intersect. For this reason, even when the velocity of the electrode 50 falling from the sliding portion 40 is high, the electrode 50 is first placed on a portion above the stopper 72 of the bottom wall portion 71 of the electrode receiving portion 70 or on the bottom wall portion 71. After landing on the upper surface of the laminated body X, it slides down and stops at the stopper 72. Therefore, the occurrence of the event illustrated in FIG. 9 can be suppressed. Further, as the stacking of the electrodes 50 proceeds, the distance at which the electrodes 50 slide down changes. However, as the stacking height of the electrodes 50 increases, the electrode receiving portion 70 moves so that the bottom wall portion 71 moves away from the lower end portion P of the bottom plate portion 41. By moving, the change in the distance that the electrode receiving portion 70 slides down is suppressed, and the displacement of the electrode 50 can be suppressed.

  Further, according to the electrode laminating apparatus 100, the distance (the sliding distances d1 and d2 in the example of FIG. 4) that the electrode 50 slides from the landing on the electrode receiving portion 70 to the stopper position (that is, the position of the contact surface 72a) is predetermined. The electrode receiving part 70 can be moved so that it may become below the defined reference value dy. Thereby, the position shift of the electrode 50 accompanying the increase in the lamination | stacking height of the electrode 50 can be suppressed more effectively.

  Further, as described above, the electrode stacking method executed by the electrode stacking apparatus 100 is performed by the control unit 90 so that the bottom wall portion 71 moves away from the lower end portion P of the bottom plate portion 41 as the stacking height of the electrodes 50 increases. A movement control step for moving the electrode receiver 70 is included. According to this electrode stacking method, in the movement control step, the electrode receiving portion 70 is moved so that the bottom wall portion 51 moves away from the lower end portion P of the bottom plate portion 41 as the stack height of the electrodes 50 increases. Even if the stacked height of the body X increases, the falling electrode 50 is prevented from landing near the upper end of the uppermost electrode 50 of the stacked body X. Therefore, it is possible to suppress the occurrence of problems (for example, damage to the tabs 14b and 17b of the electrode 50) accompanying the increase in the stacking height of the electrode 50.

  Moreover, according to the electrode stacking apparatus 100, the electrode receiving part 70 moves along the front-rear direction, so that the moving mechanism of the electrode receiving part 70 can be simplified.

  Further, in the electrode stacking apparatus 100, the direction in which the electrode receiving portion 70 is moved to take out the electrode 50 (laminated body X) stacked on the electrode receiving portion 70 is a direction along the front-rear direction (front). Therefore, according to the electrode stacking apparatus 100, the movement for suppressing the positional deviation of the electrode 50 accompanying the increase in the stacking height of the electrode 50 (that is, the backward movement) can be realized by the movement by the uniaxial moving mechanism, Furthermore, movement for taking out the electrode 50 (that is, movement forward) can also be realized. Accordingly, it is not necessary to provide separate movement mechanisms for the movement for suppressing the positional deviation of the electrode 50 and the movement for taking out the electrode 50, so that the movement mechanism of the electrode receiving portion 70 can be further simplified. In the present embodiment, as an example, the rail unit 81, the sliding unit 82, the toothed belt 83, the motor 84, and the like constitute the moving mechanism described above.

  In the example of FIG. 4, the control unit 90 moves the electrode receiving unit 70 so that the absolute position of the landing position of the electrode 50 becomes substantially constant as the stacked body X is formed. That is, the electrode receiving portion 70 is moved so that the relative distance of the landing position of the electrode 50 with respect to the lower end portion P of the bottom plate portion 41 is substantially constant. When the electrode receiving portion 70 is moved in this way, the magnitude of impact when the electrode 50 falling from the lower end portion P of the bottom plate portion 41 lands on the upper surface of the bottom wall portion 71 or the upper surface of the laminate X is set. It can be kept substantially constant. Thereby, the landing condition of the electrode 50 can be made constant, and it can be expected that the displacement of the electrode 50 due to the impact at the time of landing is suppressed.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, the method by which the control unit 90 detects the stacking height of the stacked body X is not limited to the above embodiment. As shown in FIG. 6, the electrode stacking apparatus may include an electrode receiving portion 70 </ b> A that can move with respect to the sliding portion 85. In this example, the electrode receiving portion 70A is attached to the sliding portion 85 so as to be slidable in the sliding direction of the electrode 50 in the bottom wall portion 71A. Specifically, the sliding portion 85 includes a plate portion 85a that contacts the bottom wall portion 71A of the electrode receiving portion 70A, and a plate portion 85b that stands on the plate portion 85a at the lower end of the plate portion 85a. is doing. Since the bottom wall portion 71A is not fixed to the plate portion 85a, the electrode receiving portion 70A is movable as described above. The plate portion 85b supports the stopper 72A in the sliding direction of the electrode 50 in the bottom wall portion 71A. A load sensor 85c for measuring a load from the stopper 72A in the sliding direction of the electrode 50 on the bottom wall portion 71A is provided on the surface of the plate portion 85b on the stopper 72A side. The load sensor 85c transmits the measurement value to the control unit 90 as needed.

  The control unit 90 may calculate the stack height of the stack X formed on the electrode receiving unit 70A based on the measurement value received from the load sensor 85c. Specifically, the control unit 90 subtracts a preset weight value of the electrode receiving portion 70A from the measured value received from the load sensor 85c, for example, to thereby reduce the weight of the stacked body X formed in the electrode receiving portion 70A. Is calculated. Then, for example, the control unit 90 calculates the number of electrodes 50 forming the stacked body X by dividing the calculated weight of the stacked body X by a preset average weight per one electrode. Then, the control unit 90 can calculate the stacking height of the stacked body X by multiplying the preset average thickness per electrode by the calculated number of electrodes 50.

  When the transport speed of the transport unit 30 is a predetermined constant speed, that is, when the number of electrodes 50 stacked on the electrode receiving unit 70 per unit time is constant, the control unit 90 The stacking height of the stacked body X may be detected based on the elapsed time from the start of stacking. Thus, the method by which the control unit 90 detects the stacking height of the stacked body X is not limited to specific mounting means and methods.

  The direction in which the electrode receiving portion 70 is moved so that the bottom wall portion 71 is separated from the lower end portion P of the bottom plate portion 41 is not limited to the backward movement exemplified in the above-described embodiment. For example, as shown in FIG. 7, the rail portion 81A, the sliding portion 82A, and the toothed belt 83A may be configured so that the electrode receiving portion 70 can move in the vertical direction. In the example shown in FIG. 7, the sliding portion 82A that supports the electrode receiving portion 70 is connected to the toothed belt 83A that is stretched along the rail portion 81A that extends in the vertical direction, so that the electrode receiving portion 70 and The sliding portion 82A is slidable in the vertical direction. In this case, the control unit 90 may move the electrode receiving unit 70 downward as the stacking height of the stacked body X increases. In addition to the above, the electrode receiving part 70 can be moved along the stacking direction of the stacked body X, and the control unit 90 can increase the stacking height as the stacking height of the stacked body X increases. The electrode receiving part 70 may be moved in the direction opposite to the above. Further, the electrode receiving portion 70 is movable in the front-rear direction and the up-down direction, and the control unit 90 moves backward and downward as the stacking height of the stacked body X increases. The electrode receiving part 70 may be moved in combination.

  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, 30 ... Conveyance 40, sliding portion, 41 ... bottom plate portion, 42 ... side plate portion, 43 ... optical sensor, 50 ... electrode, 60 ... laminated portion, 70 ... electrode receiving portion, 71 ... bottom wall portion, 72 ... stopper, 72a ... contact Surface, 73 ... Side wall part, 80 ... Support part, 81, 81A ... Rail part, 82, 82A, 85 ... Sliding part, 83, 83A ... Toothed belt, 84 ... Motor, 85c ... Load sensor, 90 ... Control part , 100: Electrode laminating device, dy: Reference value, P: Lower end, P1, P2: Landing position, X: Laminate.

Claims (5)

An electrode laminating apparatus for laminating a plurality of sheet-like electrodes,
A sliding part inclined with respect to a horizontal direction so as to slide the electrode downward;
A bottom wall portion disposed below the lower end portion of the sliding portion and inclined with respect to the horizontal direction, on which the electrode falling from the lower end portion of the sliding portion is placed, and orthogonal to the inclination direction of the bottom wall portion A stopper that extends in a direction to contact the other end of the main body of the electrode placed on the bottom wall and is opposite to the other end provided with a tab, and stops the electrode; An electrode receiver having
Depending on the increase in stack height of the electrode, the stop and landing position where the other end contacts the first upper surface of the electrode receiving portion or laminates formed on the bottom wall portion of the electrode is the A control unit that moves the electrode receiving portion so that a distance along the inclination direction of the bottom wall portion between the contact surface that contacts the other end portion of the electrode is equal to or less than a predetermined reference value. and, with a,
The electrode stacking apparatus, wherein the reference value is a value smaller than a height from the one end to the other end of the main body . The bottom wall portion intersects a virtual plane along the sliding surface of the sliding portion and a portion of the bottom wall portion above the stopper, or an upper surface of the electrode placed on the bottom wall portion. Arranged to
The electrode lamination apparatus according to claim 1. The control unit moves the electrode receiver along a predetermined uniaxial direction.
The electrode lamination apparatus according to claim 1 or 2. The direction in which the electrode receiving portion is moved to take out the electrode laminated on the electrode receiving portion is along the uniaxial direction.
The electrode lamination apparatus according to claim 3. A sliding part inclined with respect to the horizontal direction so as to slide the sheet-like electrode downward;
A bottom wall portion disposed below the lower end portion of the sliding portion and inclined with respect to the horizontal direction, on which the electrode falling from the lower end portion of the sliding portion is placed, and orthogonal to the inclination direction of the bottom wall portion A stopper that extends in a direction to contact the other end of the main body of the electrode placed on the bottom wall and is opposite to the other end provided with a tab, and stops the electrode; An electrode stacking method using an electrode stacking apparatus comprising:
Depending on the increase in stack height of the electrode, the stop and landing position where the other end contacts the first upper surface of the electrode receiving portion or laminates formed on the bottom wall portion of the electrode is the Movement control for moving the electrode receiving portion so that the distance along the inclined direction of the bottom wall portion between the contact surface contacting the other end portion of the electrode is equal to or less than a predetermined reference value. the process only contains,
The reference value is an electrode stacking method , wherein the reference value is a value smaller than a height from the one end portion to the other end portion of the main body portion .

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