JP2018092834A - Electrode lamination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode lamination device in which an electrode can be sufficiently pushed to the depth in the travel direction of a pusher.SOLUTION: An electrode lamination device 20 includes: a lamination part 34 which is equipped with a side wall 45 and on which an electrode 11 with a separator is laminated; and a positive electrode pusher 36 for pushing the positive electrode 11 with the separator toward the lamination part 34. The positive electrode pusher 36 includes: an extruding part 52 for extruding the positive electrode 11 with the separator; and a side part 53 for performing positioning of the positive electrodes 11 with the separator in the width direction (Y direction) of the positive electrodes 11 intersected with each other in the travel direction (X direction) of the positive electrode pusher 36. The side part 53 collides with the lamination part 34 when the positive electrode 11 with the separator is pushed out, whereby the positive electrode pusher 36 is deformed.SELECTED DRAWING: Figure 6

Description

  One aspect of the present invention relates to an electrode stacking apparatus.

  As a conventional electrode stacking apparatus, for example, an apparatus described in Patent Document 1 is known. An electrode laminating device described in Patent Literature 1 includes an accumulating device having an accumulating unit that alternately laminates positive plate sheets and negative electrode plates, a negative plate conveying belt disposed on one side of the accumulating unit, and a negative electrode plate A negative plate supply device that is disposed near the base end side of the transport belt and supplies the negative plate to the negative plate transport belt, and a positive plate sheet transport belt disposed above the base end side of the negative plate transport belt. ing. The integrated unit rises in a direction perpendicular to the upper surface of the support substrate, the first side plate that rises in a direction perpendicular to the upper surface of the support substrate, and the angle formed by the first side plate is a right angle. And the second side plate. The negative electrode plate supplied from the negative electrode plate supply device is placed on the negative electrode plate conveyance belt, and the positive electrode plate sheet supplied by the positive electrode plate sheet conveyance belt falls and overlaps the negative electrode plate. Then, the negative electrode plate and the positive electrode plate sheet that are overlapped with each other are stacked on the support substrate of the stacking unit in a state of protruding from the tip of the negative plate transport belt and abutting against the first side plate of the stacking unit.

  Moreover, in the apparatus described in Patent Document 2, the work is transported along a path of ascending, horizontally moving, and descending by a transporting device provided with a suction unit, and stacked in a stacking unit having a box shape. The stacking unit moves in a state where the stacked workpieces are placed.

JP 2014-179304 A JP 2012-56648 A

  The technology of Patent Document 1 is to drop and stack the positive electrode plate and the negative electrode plate conveyed by the conveyor belt from one end of the conveyor belt, compared to the case of using the adsorption device described in Patent Document 2, The moving path of the work can be short. However, since the positive electrode plate and the negative electrode plate collide with the side plate of the accumulation portion at a high speed, the active material is easily separated from the active material layer. Then, it is possible to extrude a workpiece | work using the pusher from conveyance apparatuses, such as a conveyor, to the lamination | stacking part as described in patent document 2. FIG. If the pusher is used for extrusion, the contact between the pusher and the electrode is maintained, so that it is possible to decelerate the electrode, for example. However, in the extrusion of the electrode by the pusher, positioning in the width direction of the electrode (a direction orthogonal to the extrusion direction) becomes a problem. That is, when the pusher is applied only to the rear side of the electrode in the pusher traveling direction, the electrode may be displaced in the width direction. On the other hand, it is conceivable to position the electrode in the width direction by using a part of the pusher so that the electrode does not shift in the width direction during extrusion. In this case, the pusher stops closer to the front due to the interference between the pusher and the stacked portion, so that the electrode cannot be pushed in sufficiently in the pusher traveling direction.

  An object of one aspect of the present invention is to provide an electrode stacking apparatus that can push an electrode sufficiently deep in a pusher traveling direction.

  An electrode laminating apparatus according to one aspect of the present invention includes a laminating portion that includes side walls and on which an electrode is laminated, and a pusher that pushes the electrode toward the laminating portion, and the pusher pushes out the electrode. And a side portion for positioning the electrode in the width direction of the electrode intersecting the traveling direction of the pusher, and when the electrode is pushed out, the side portion collides with the stacked portion. The pusher is deformed.

  According to the electrode laminating apparatus, the side of the pusher collides with the laminated portion and the pusher is deformed. Due to the deformation of the pusher, the pushing portion can further proceed in the pusher moving direction, so that the electrode can be pushed in sufficiently deeply.

  The side portion may be connected to the push-out portion via an elastic member, and the side portion may move relative to the push-out portion when the side portion collides with the side wall of the stacked portion. .

  In this case, the extruding part that extrudes the electrode does not substantially move in the width direction of the electrode that intersects the traveling direction of the pusher regardless of the collision between the side part and the side wall. Therefore, the position shift of the electrode due to the movement of the pushing portion does not substantially occur.

  The pusher may have a plurality of side portions, and the plurality of side portions may move so as to approach each other as the electrode is pushed out.

  Thereby, the positioning of the electrode in the width direction of the electrode that intersects the traveling direction of the pusher can be performed while pushing out the electrode. As a result, the electrode stacking speed can be improved.

  The side portion may have elasticity in a traveling direction of the pusher.

  In this case, in the moving direction of the pusher, the pushing portion can further proceed by a distance that the side portion contracts from the position where the side portion collides with the laminated portion.

  A plurality of stacked portions may be provided, and a gap through which the electrode passes may be provided between the plurality of stacked portions.

  In this case, there is a high possibility that the pusher collides with the laminated portion when the electrode is pushed out toward the laminated portion. Even in such a case, the side of the pusher is deformed, so that the electrode can be pushed in sufficiently deeply.

  The electrode stacking apparatus further includes a transport unit that transports the electrode, and the transport unit has an outer peripheral surface that circulates so as to form a circulation path that descends after being lifted, and a circulation member that is movable in the vertical direction. A support portion that supports the electrode, wherein the support portion is provided on the outer peripheral surface of the circulation member, and the electrode is in a first region in which the outer peripheral surface of the circulation path rises, In the second region where the outer peripheral surface of the circulation path is supplied to the support portion and descends, the support portion may be pushed toward the stacked portion.

  In this case, in the first region where the outer peripheral surface of the circulation path rises, the electrode is supplied to the support portion, and in the second region where the outer peripheral surface of the circulation route descends, the electrode is pushed out toward the stacked portion. . For example, even when the electrodes are not supplied at regular intervals, the electrodes can be sequentially supplied to the plurality of support portions by moving the circulation member in the vertical direction.

  According to one aspect of the present invention, it is possible to provide an electrode stacking apparatus that can push an electrode sufficiently deep in the pusher traveling direction.

It is sectional drawing which shows the inside of the electrical storage apparatus manufactured by applying the electrode lamination apparatus which concerns on one Embodiment. It is the II-II sectional view taken on the line of FIG. 1 is a side view (including a partial cross section) illustrating an electrode stacking apparatus according to an embodiment. It is a perspective view which shows the external appearance of the electrode laminated | stacked in the laminated part shown in FIG. 3 and a laminated part. It is the schematic which shows a mode that an electrode is extruded toward a laminated part with the pusher shown by FIG. It is the schematic which shows a mode that the side part of the pusher shown by FIG. 3 collided with the laminated part and deform | transformed. It is a side view (a partial cross section is included) which shows the electrode lamination apparatus which concerns on other embodiment. It is the schematic which shows a mode that an electrode is extruded toward a laminated part with the pusher which concerns on a modification. It is the schematic which shows a mode that the side part of the pusher shown by FIG. 8 collided with the lamination | stacking part, and deform | transformed. It is a schematic plan view which shows the modification of the movement path | route of the side part of the pusher shown by FIG.

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

  FIG. 1 is a cross-sectional view showing the inside of a power storage device manufactured by applying an electrode stacking apparatus according to an embodiment. 2 is a cross-sectional view taken along line II-II in FIG. 1 and 2, the power storage device 1 is a lithium ion secondary battery having a stacked electrode assembly.

  The power storage device 1 includes, for example, a substantially rectangular parallelepiped case 2 and an electrode assembly 3 accommodated in the case 2. The case 2 is made of a metal such as aluminum. Although not shown, for example, a non-aqueous (organic solvent) electrolyte is injected into the case 2. The case 2 includes a case main body 2a having an opening at the top, and a lid 2b fixed to the case main body 2a by welding so as to close the opening. A positive electrode terminal 4 and a negative electrode terminal 5 are spaced apart from each other on the lid 2b. The positive electrode terminal 4 is fixed to the lid 2 b via an insulating ring 6, and the negative electrode terminal 5 is fixed to the lid 2 b via an insulating ring 7. Although not shown, for example, an insulating film is disposed between the electrode assembly 3 and the inner side surface and bottom surface of the case 2, and the case 2 and the electrode assembly 3 are insulated by the insulating film. ing.

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

  The positive electrode 8 includes a metal foil 14 made of, for example, an aluminum foil, and a positive electrode active material layer 15 formed on both surfaces of the metal foil 14. The metal foil 14 has a foil body portion 14a having a rectangular shape in plan view, and a tab 14b integrated with the foil body portion 14a. The tab 14b protrudes from the edge in the vicinity of one end portion in the longitudinal direction of the foil body portion 14a and penetrates the separator 10. The tab 14 b is connected to the positive electrode terminal 4 through the conductive member 12. In FIG. 2, the tab 14b is omitted for convenience.

  The positive electrode active material layer 15 is formed on both surfaces of the foil main body portion 14a. The positive electrode active material layer 15 is a porous layer formed including a positive electrode active material and a binder. Examples of the positive electrode active material include composite oxide, metallic lithium, and sulfur. The composite oxide includes, for example, at least one of manganese, nickel, cobalt, and aluminum and lithium.

  The negative electrode 9 includes a metal foil 16 made of, for example, copper foil, and a negative electrode active material layer 17 formed on both surfaces of the metal foil 16. The metal foil 16 includes a foil body portion 16a having a rectangular shape in plan view, and a tab 16b integrated with the foil body portion 16a. The tab 16b protrudes from the edge in the vicinity of one end in the longitudinal direction of the foil body 16a. The tab 16 b is connected to the negative electrode terminal 5 through the conductive member 13. In FIG. 2, the tab 16b is omitted for convenience.

  The negative electrode active material layer 17 is formed on both surfaces of the foil main body portion 16a. The negative electrode active material layer 17 is a porous layer formed including a negative electrode active material and a binder. Examples of the negative electrode active material include carbon such as graphite, highly oriented graphite, mesocarbon microbeads, hard carbon, and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5 ≦ x ≦ 1.5 ) And the like or boron-added carbon.

  The separator 10 has a rectangular shape in plan view. Examples of the material of the separator 10 include a porous film made of a polyolefin-based resin such as polyethylene (PE) and polypropylene (PP), or a woven or non-woven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose, or the like.

  When the power storage device 1 configured as described above is manufactured, first, the positive electrode 11 with separator and the negative electrode 9 are manufactured, and then the positive electrode 11 with separator and the negative electrode 9 are alternately stacked, and the positive electrode 11 with separator and the negative electrode 9 are stacked. Is fixed with tape or the like to obtain the electrode assembly 3. Then, in a state where the lid 2b of the case 2 and the conductive members 12, 13 and the positive electrode terminal 4 and the negative electrode terminal 5 are assembled and integrated in advance, the tab 14b of the positive electrode 11 with the separator is connected to the positive electrode terminal 4 via the conductive member 12. In addition to the connection, the tab 16 b of the negative electrode 9 is connected to the negative electrode terminal 5 through the conductive member 13. And the electrode assembly 3 is accommodated in the case main body 2a, and the case main body 2a and the lid | cover 2b are welded.

  FIG. 3 is a side view (including a partial cross-section) illustrating an electrode stacking apparatus according to an embodiment. The electrode stacking apparatus 20 of the present embodiment is an apparatus that alternately stacks the positive electrode 11 with separator and the negative electrode 9.

  The electrode lamination apparatus 20 includes a positive electrode conveyance unit 21 as a conveyance unit, a negative electrode conveyance unit 22 as a conveyance unit, a positive electrode supply conveyor 23, a negative electrode supply conveyor 24, and a lamination unit 25. The positive electrode transport unit 21 and the negative electrode transport unit 22 are arranged side by side in the X direction.

  The positive electrode transport unit 21 is a unit that sequentially transports the positive electrode 11 with the separator while storing it. The positive electrode transport unit 21 includes a loop-shaped circulation member 26 extending in the vertical direction (Z direction), and a plurality of U-shaped support portions attached to the outer peripheral surface 26b of the circulation member 26 and supporting the positive electrode 11 with a separator. 27 and a drive unit 28 for driving the circulation member 26. The Z direction is a direction perpendicular to the X direction.

  The circulation member 26 is composed of, for example, an endless belt. The circulation member 26 is stretched over two pulleys 26a that are spaced apart from each other in the vertical direction, and is rotated along with the rotation of each pulley 26a. Thereby, the outer peripheral surface 26b circulates so as to form a circulation path that descends after rising. As the circulation member 26 rotates (circulates) in this way, each support portion 27 circulates and moves. The separator-attached positive electrode 11 is supplied to the support portion 27 in the first region Rp1 where the outer peripheral surface 26b of the circulation path rises, and in the second region Rp2 where the outer peripheral surface 26b of the circulation path descends, the stacked portion 34 is provided. It is pushed out toward. Further, the circulation member 26 is movable in the vertical direction.

  The drive unit 28 rotates the circulation member 26 and moves the circulation member 26 in the vertical direction. At this time, the drive unit 28 rotates the circulation member 26 clockwise (in the direction of the arrow in the drawing) when viewed from the front side of the electrode stacking apparatus 20 (the front side of the drawing in FIG. 3). Accordingly, the support portion 27 on the positive electrode supply conveyor 23 side rises with respect to the circulation member 26, and the support portion 27 on the stacked unit 25 side descends with respect to the circulation member 26. Note that the front-rear direction of the electrode stacking apparatus 20 is a Y direction perpendicular to the X direction and the Z direction.

  The negative electrode transport unit 22 is a unit that sequentially transports the negative electrodes 9 while storing them. The negative electrode transport unit 22 includes a loop-shaped circulation member 29 extending in the vertical direction (Z direction), and a plurality of U-shaped support portions 30 that are attached to the outer peripheral surface 29 b of the circulation member 29 and support the negative electrode 9. And a drive unit 31 that drives the circulation member 29.

  The circulation member 29 is configured by, for example, an endless belt, like the circulation member 26. The circulation member 29 is stretched over two pulleys 29a that are spaced apart from each other in the vertical direction, and is rotated along with the rotation of each pulley 29a. Thereby, the outer peripheral surface 29b circulates so as to form a circulation path that descends after rising. As the circulation member 29 rotates (circulates) in this manner, each support portion 30 circulates and moves. The negative electrode 9 is supplied to the support portion 30 in the first region Rn1 where the outer peripheral surface 29b of the circulation path rises, and toward the stacked portion 34 in the second region Rn2 where the outer peripheral surface 29b of the circulation route descends. Pushed out. Further, the circulation member 29 is movable in the vertical direction.

  The drive unit 31 rotates the circulation member 29 and moves the circulation member 29 in the vertical direction. At this time, the drive unit 31 rotates the circulation member 29 counterclockwise (in the direction of the arrow in the drawing) when viewed from the front side of the electrode stacking apparatus 20 (the front side of the drawing in FIG. 3). Therefore, the support part 30 on the negative electrode supply conveyor 24 side rises with respect to the circulation member 29, and the support part 30 on the laminated unit 25 side descends with respect to the circulation member 29.

  The positive electrode supply conveyor 23 conveys the positive electrode 11 with a separator in a horizontal direction toward the positive electrode conveyance unit 21, and supplies the positive electrode 11 with a separator to the support portion 27 of the positive electrode conveyance unit 21. The positive electrode supply conveyor 23 has a plurality of claw portions 32 provided at equal intervals along the circulation direction of the positive electrode supply conveyor 23. The nail | claw part 32 contact | abuts the edge part of the conveyance direction rear side of the positive electrode 11 with a separator. Accordingly, the positive electrode 11 with a separator is supplied to the positive electrode transport unit 21 at regular intervals.

  The negative electrode supply conveyor 24 conveys the negative electrode 9 toward the negative electrode conveyance unit 22 in the horizontal direction, and supplies the negative electrode 9 to the support portion 30 of the negative electrode conveyance unit 22. The negative electrode supply conveyor 24 has a plurality of claw portions 33 provided at equal intervals along the circulation direction of the negative electrode supply conveyor 24. The claw portion 33 is in contact with the end of the negative electrode 9 on the rear side in the conveyance direction. Accordingly, the negative electrode 9 is supplied to the negative electrode transport unit 22 at regular intervals.

  The stacked unit 25 is disposed between the positive electrode transport unit 21 and the negative electrode transport unit 22. The laminated unit 25 includes a plurality of (four in this case) laminated portions 34 in which the positive electrodes 11 with separators and the negative electrodes 9 as electrodes are alternately laminated in the Z direction, and a drive for moving these laminated portions 34 in the vertical direction. Part 35. A gap 34 a for allowing the separator-attached positive electrode 11 or the negative electrode 9 to pass therethrough is provided between the plurality of stacked portions 34. The separator-attached positive electrode 11 is transferred into the stacked unit 34 through a gap 34 a located on the positive electrode transport unit 21 side. The negative electrode 9 is transferred into the stacked unit 34 through a gap 34a located on the negative electrode transport unit 22 side. The configuration of the stacked unit 34 will be described in detail later.

  The electrode stacking apparatus 20 includes a positive pusher 36 and a negative pusher 37 that are disposed so as to sandwich the stacked portions 34 of the stacked unit 25.

  The positive electrode pusher 36 can simultaneously extrude a plurality (four in this case) of the positive electrodes 11 with separators toward a plurality of stacked portions 34. The positive electrode pusher 36 includes a pair of pressing members 38 and 38 (see FIGS. 5 and 6) that press the positive electrodes 11 with separators, and a drive unit 39 that moves the pressing members 38 to be movable back and forth with respect to the stacked unit 34. have. The pair of pressing members 38, 38 can be driven synchronously by a plurality of driving units 39, 39 that can be driven independently of each other. The drive unit 39 includes, for example, a cylinder, but may include a motor and a link mechanism instead of the cylinder. The configuration of the positive electrode pusher 36 will be described in detail later.

  The negative electrode pusher 37 can simultaneously extrude a plurality (four in this case) of the negative electrodes 9 toward the multi-stage stacked portion 34. The negative electrode pusher 37 has a pair of pressing members 40, 40 that press each negative electrode 9, and a drive unit 41 that moves each pressing member 40 so as to be movable forward and backward with respect to the stacked unit 34. The pair of pressing members 40, 40 can be driven in synchronization by a plurality of driving units 41, 41 that can be driven independently of each other. The drive unit 41 includes, for example, a cylinder, but may include a motor and a link mechanism instead of the cylinder. The configuration of the negative electrode pusher 37 will be described in detail later.

  The positive electrode transport unit 21 and the negative electrode transport unit 22 perform periodic driving, for example, intermittent driving, in synchronization with the interval at which the positive electrode 11 with separator or the negative electrode 9 is supplied. Further, the normal operation states of the positive electrode transport unit 21 and the negative electrode transport unit 22 include three states of a circulation operation, a stacking operation, and a return operation. In the case of an abnormality, for example, when there is a shortage in supplying the electrodes from the positive electrode supply conveyor 23 and the negative electrode supply conveyor 24, the description is omitted here.

  The operation state of the negative electrode transport unit 22 will be described below, but the operation of the positive electrode transport unit 21 is the same. In this example, it is easy to understand. The negative electrode transport unit 22 is intermittently driven, and the support portion 30 is moved during a period in which the negative electrode 9 supplied from the negative electrode supply conveyor 24 is not transferred. This period is set as a unit travel time. Further, the distance that the support part 30 on the negative electrode supply conveyor 24 side moves during the unit movement time, that is, the interval between the support parts 30 is defined as a unit distance.

  In the circulation operation, the circulation member 29 performs only rotation (circulation) by intermittent driving. At this time, the height of the circulation member 29 is constant. The operation (initial operation) performed immediately after the operation is an operation of conveying the negative electrode 9 supported by the support unit 30 to a position where the negative electrode 9 can be pushed out to the lamination unit 34 from the state where the negative electrode 9 is not present in the electrode stacking device 20. is there.

  The stacking operation is an operation of pushing the negative electrode 9 supported by the support unit 30 to the stacking unit 34 on the side facing the stacking unit 34. On the side facing the stacked portion 34, the support portion 30 is stopped so that the negative electrode 9 can be pushed out. On the other hand, on the side facing the negative electrode supply conveyor 24, the negative electrode 9 is sequentially transferred from the negative electrode supply conveyor 24 to the support portion 30 while moving the support portion 30. Specifically, the circulation member 29 is circulated by a half of the unit distance within the unit movement time, and at the same time, the circulation member 29 is raised by the same distance. Thereby, the support part 30 stops on the side facing the laminated part 34, and the support part 30 rises by a unit distance on the side facing the negative electrode supply conveyor 24.

  In the returning operation, the circulating member 29 raised during the stacking operation is lowered, that is, returned to the original position, and the support portion 30 on which the negative electrode 9 is supported faces the stacking portion 34 so as to be stacked. It is an operation to move to. For this reason, the circulating member 29 is lowered within the unit movement time, and the circulating member 29 is circulated by an amount obtained by adding the unit distance to the lowered amount of the circulating member 29. Note that the descending amount of the circulation member 29 depends on the number of sheets stacked at the same time per stacking, the time required for stacking, and the like. In this example, the support unit 30 is lowered by 4 unit distances within the unit movement time on the side facing the stacked unit 34, and the support unit 30 is moved within the unit movement time on the side facing the negative electrode supply conveyor 24. Raised by unit distance. For this purpose, the circulating member 29 is lowered by 1.5 unit moving distance, and the circulating member 29 is circulated by 2.5 unit moving distance.

  In the above, during the initial operation (circulation operation), the separator-attached positive electrode 11 transferred from the positive electrode supply conveyor 23 to the support portion 27 of the positive electrode transport unit 21 once rises due to the rotation of the circulation member 26. Circulate so that it descends. At this time, the front and back of the positive electrode 11 with a separator are reversed in the upper part of the circulation member 26. Further, the negative electrode 9 transferred from the negative electrode supply conveyor 24 to the support portion 30 of the negative electrode transport unit 22 circulates and moves so as to rise once and then lower due to the rotation of the circulation member 29. At this time, the front and back of the negative electrode 9 are reversed in the upper part of the circulation member 29. And the positive electrode 11 with a separator and the negative electrode 9 are conveyed to the position which can be laminated | stacked with respect to the four-step lamination | stacking part 34 of the lamination | stacking unit 25. FIG.

  During the stacking operation, the height position of the support portion 27 facing the stacking portion 34 is constant. In this state, the positive electrodes 11 with separators are simultaneously stacked on the stacked portions 34 by simultaneously extruding the four positive electrodes 11 with separators toward the four-layer stacked portions 34 by the positive electrode pusher 36. After the separator-attached positive electrode 11 is stacked on the stacked portion 34 and the positive electrode pusher 36 returns to the original position, the return operation is performed. In the return operation, the support part 27 on which the positive electrode 11 with separator is supported is moved to a position facing the laminated part 34. The same applies to the operation until the negative electrode 9 is stacked on each stacked portion 34.

  The electrode stacking apparatus 20 further includes a control unit 60. The control unit 60 includes a CPU, a RAM, a ROM, an input / output interface, and the like. The control unit 60 controls the drive unit 28 of the positive electrode transport unit 21, the drive unit 31 of the negative electrode transport unit 22, the drive unit 35 of the stacked unit 25, the drive unit 39 of the positive electrode pusher 36, and the drive unit 41 of the negative electrode pusher 37.

  FIG. 4 is a perspective view showing the appearance of the positive electrode 11 with a separator and the negative electrode 9 laminated in the laminated part 34 and the laminated part 34 of the laminated unit 25 described above. In FIG. 4, the laminated portion 34 is provided with a rectangular base 42 in plan view on which the positive electrode 11 with separator and the negative electrode 9 are placed, and an edge of the base 42, and the positive electrode 11 with separator and the negative electrode 9. And a positioning side plate 43 for positioning.

  The positioning side plate 43 is erected on one edge of the base 42, and includes a side wall 44 for positioning the bottom edge 11 a (see FIG. 5) of the positive electrode 11 with a separator and the bottom edge of the negative electrode 9, and two of the base 42. Side walls 45 and 46, which are erected so as to face each other and position the side edge 11b (see FIG. 5) of the positive electrode 11 with a separator and the side edge of the negative electrode 9, and one edge of the base 42 The upper edge 11c of the positive electrode 11 with a separator (see FIG. 5) and the side walls 47 and 48 for positioning the upper edge of the negative electrode 9 are provided. The side wall 47 is connected to the side wall 45. The side wall 48 is connected to the side wall 46. The side walls 45 and 46 are connected to the side wall 44. The bottom edge 11a of the positive electrode 11 with a separator is an edge opposite to the upper edge 11c of the positive electrode 11 with a separator. A tab 14b is provided on the upper edge 11c of the positive electrode 11 with a separator. The bottom edge of the negative electrode 9 is an edge opposite to the upper edge of the negative electrode 9. A tab 16 b is provided on the upper edge of the negative electrode 9.

  FIG. 5 is a schematic view showing a state in which the separator-attached positive electrode 11 is pushed out toward the laminated portion 34 by the positive electrode pusher 36 described above. FIG. 6 is a schematic diagram illustrating a state in which the side portion 53 of the positive electrode pusher 36 described above collides with the stacked portion 34 and is deformed. 5 and 6, (A) is a top view and (B) is a side view. The positive pusher 36 has a pair of pressing members 38, 38 and a drive unit 39 corresponding to each pressing member 38. The drive unit 39 is connected to the pressing member 38 via a rod 51 that can expand and contract in the traveling direction (X direction) of the positive electrode pusher 36.

  The pressing member 38 is a side that positions the positive electrode 11 with the separator in the width direction (Y direction) of the positive electrode 11 with the separator that intersects the advancing direction (X direction) of the positive electrode pusher 36 and the pushing portion 52 that extrudes the positive electrode 11 with the separator. Part 53. The side portion 53 is connected to the extrusion portion 52 and extends in the traveling direction (X direction) of the positive electrode pusher 36. When the positive electrode 11 with separator is pushed out, the side portion 53 collides with the side wall 45 of the stacked portion 34, whereby the positive electrode pusher 36 is deformed. The extruding part 52 extends in the width direction (Y direction) of the positive electrode 11 with a separator intersecting the traveling direction (X direction) of the positive electrode pusher 36 and has an extruding surface that contacts the positive electrode 11 with separator. The traveling direction of the positive electrode pusher 36 and the width direction of the positive electrode 11 with the separator intersecting with the traveling direction both intersect the stacking direction (Z direction) of the positive electrode 11 with separator and the negative electrode 9. The extruding part 52 is a non-conductive resin member, for example. The extruding parts 52 and 52 are separated from each other by an interval through which the support part 27 can pass in the width direction of the positive electrode 11 with the separator intersecting the traveling direction of the positive electrode pusher 36. The side part 53 does not have the extrusion surface which extrudes the positive electrode 11 with a separator. The side portion 53 protrudes forward from the pushing portion 52 toward the stacked portion 34 in the traveling direction of the positive electrode pusher 36. The side portions 53 are arranged to face each other across the positive electrode 11 with the separator in the width direction of the positive electrode 11 with the separator intersecting the traveling direction of the positive electrode pusher 36. The side parts 53 and 53 are spaced apart from each other by a predetermined interval while the separator-attached positive electrode 11 is pushed out. The said space | interval is the same as the width | variety of the separator 10 of the positive electrode 11 with a separator. Thereby, the positive electrode 11 with a separator is positioned in the Y direction. The side portion 53 has elasticity in the traveling direction of the positive electrode pusher 36. The side portion 53 is connected to the pushing portion 52 via an elastic member 54 such as a spring, for example, but the elastic member 54 may be another elastic member such as rubber. When the side portion 53 collides with the side wall 45 of the stacked portion 34, the side portion 53 moves relative to the pushing portion 52.

  As shown in FIG. 5, the positive electrode pusher 36 pushes the positive electrode 11 with a separator toward the stacked portion 34 in a state where the positive electrode 11 with a separator is disposed between the side portions 53 and 53. When the side portion 53 of the positive electrode pusher 36 collides with the laminated portion 34, the pushing portion 52 of the positive electrode pusher 36 contacts the laminated portion 34 with the side portion 53 in contact with the laminated portion 34, as shown in FIG. 6. The side part 53 is deformed. When the extruding part 52 comes into contact with the laminated part 34, the progress of the positive pusher 36 is stopped. In the present embodiment, when the spring in the side portion 53 is contracted, the side portion 53 protrudes from the pushing portion 52 in a direction (backward) away from the stacked portion 34 in the traveling direction of the positive electrode pusher 36. When the positive electrode pusher 36 moves backward and the side portion 53 moves away from the stacked portion 34, the side portion 53 returns to the original position (see FIG. 5).

  The configuration and operation of the negative electrode pusher 37 are the same as those of the positive electrode pusher 36. The pressing member 40 of the negative electrode pusher 37 has an extrusion portion that pushes out the negative electrode 9 and a side portion that collides with the laminated portion 34 when the negative electrode 9 is pushed out.

  As described above, the electrode stacking apparatus 20 according to this embodiment includes the side wall 45, the stacked portion 34 where the positive electrode 11 with the separator and the negative electrode 9 are stacked, and the positive electrode that pushes the positive electrode 11 with the separator toward the stacked portion 34. And a pusher 36. The positive electrode pusher 36 is a side that positions the positive electrode 11 with separator in the width direction (Y direction) of the positive electrode 11 with separator that intersects the advancing direction (X direction) of the positive electrode pusher 36 and the extruding part 52 that extrudes the positive electrode 11 with separator. Part 53. When the positive electrode 11 with a separator is pushed out, the side portion 53 collides with the laminated portion 34, whereby the positive electrode pusher 36 is deformed.

  According to such an electrode stacking apparatus 20, the side portion 53 of the positive electrode pusher 36 collides with the side wall 45 of the stacked portion 34 and is deformed rearward in the traveling direction of the positive electrode pusher 36. Therefore, since the extrusion part 52 can further advance in the advancing direction of the positive electrode pusher 36, the positive electrode 11 with a separator is pushed in sufficiently deeply. Further, when the positive electrode pusher 36 is retracted and the side portion 53 is separated from the side wall 45 of the stacked portion 34, the side portion 53 can return to the original position.

  Note that when only the interference between the side portion 53 and the side wall 45 of the stacked portion 34 is considered, the support portion 27, the positive electrode pusher 36, and the stacked portion 34 may be largely shifted in the vertical direction (Z direction). In this case, the positive electrode 11 with the separator may be pushed out above the side wall 45 of the stacked portion 34 so that the side portion 53 that positions the positive electrode 11 with the separator in the width direction (Y direction) does not interfere. However, in this case, since the separator-equipped positive electrode 11 is thrown into the laminated portion 34 with a larger inclination angle, poor lamination tends to occur. For this reason, the support surface of the positive electrode 11 with the separator in the support portion 27 is at the same height as the upper end of the side wall 45 or slightly above it (position where the side portion 53 interferes with the side wall 45). 36 operates.

  Similarly to the positive electrode pusher 36, the negative electrode pusher 37 has an extruding part for extruding the negative electrode 9 and a side part that collides with the laminated part 34 when the negative electrode 9 is extruded. Can be pushed in deeply.

  Further, in the present embodiment, the positive electrode pusher 36 has a plurality of side portions 53, 53, and the plurality of side portions 53, 53 are in the width direction of the positive electrode 11 with separator that intersects the traveling direction of the positive electrode pusher 36. They are arranged to face each other across the positive electrode 11 with a separator. Therefore, the movement of the positive electrode 11 with the separator can be restricted in the width direction of the positive electrode 11 with the separator intersecting the traveling direction of the positive electrode pusher 36.

  Similar to the positive electrode pusher 36, the plurality of side portions of the negative electrode pusher 37 are also arranged to face each other across the negative electrode 9 in the width direction of the negative electrode 9 intersecting the traveling direction of the negative electrode pusher 37. Therefore, the movement of the negative electrode 9 can be restricted in the width direction of the negative electrode 9 intersecting the traveling direction of the negative electrode pusher 37.

  In the present embodiment, the side portion 53 is connected to the extrusion portion 52 via the elastic member 54, and the side portion 53 collides with the side wall 45 of the laminated portion 34, whereby the side portion 53 53 moves relatively. In this case, the extruding part 52 that extrudes the positive electrode 11 with the separator moves substantially in the width direction of the positive electrode 11 with the separator intersecting the traveling direction of the positive pusher 36 regardless of the collision between the side part 53 and the side wall 45. do not do. Therefore, the position shift of the positive electrode 11 with a separator due to the movement of the pushing portion 52 does not substantially occur.

  Similar to the positive electrode pusher 36, the side portion of the negative electrode pusher 37 is also connected to the extrusion portion via an elastic member, and the side portion collides with the side wall 46 of the laminated portion 34, so that the side portion is against the extrusion portion. Move relative. Therefore, the position shift of the negative electrode 9 due to the movement of the pushing portion does not substantially occur.

  In the present embodiment, the side portion 53 has elasticity in the traveling direction of the positive electrode pusher 36. Therefore, in the traveling direction of the positive electrode pusher 36, the pushing portion 52 further proceeds from the position where the side portion 53 collides with the laminated portion 34 by the distance that the side portion 53 contracts (the protruding distance of the side portion 53 from the pushing portion 52). it can.

  Similarly to the positive electrode pusher 36, the side portion of the negative electrode pusher 37 has elasticity in the traveling direction of the negative electrode pusher 37, so that the pushing portion can further proceed by the distance the side portion contracts in the traveling direction of the negative electrode pusher 37.

  In addition, the electrode stacking apparatus 20 of the present embodiment includes a plurality of stacked portions 34, and a gap 34 a through which the separator-attached positive electrode 11 passes is provided between the stacked portions 34 and 34. Therefore, there is a high possibility that the positive electrode pusher 36 collides with the stacked portion 34 when the positive electrode 11 with separator is pushed out toward the stacked portion 34. Even in such a case, the side portion 53 of the positive electrode pusher 36 is deformed, so that the positive electrode 11 with a separator is pushed in sufficiently deeply. Similarly, even if the gap 34a for allowing the negative electrode 9 to pass therethrough is provided between the plurality of stacked portions 34, 34, the negative electrode 9 can be pushed in sufficiently deeply.

  Moreover, the electrode lamination apparatus 20 of this embodiment is provided with the positive electrode conveyance unit 21 which conveys the positive electrode 11 with a separator. The positive electrode transport unit 21 includes an outer peripheral surface 26b that circulates so as to form a circulation path that descends after ascending, and a circulation member 26 that can move in the vertical direction, and a support portion 27 that supports the positive electrode 11 with a separator. . The support portion 27 is provided on the outer peripheral surface 26 b of the circulation member 26. The separator-attached positive electrode 11 is supplied to the support portion 27 in the first region Rp1 where the outer peripheral surface 26b of the circulation path rises, and in the second region Rp2 where the outer peripheral surface 26b of the circulation path descends, the stacked portion 34 is provided. It is pushed out toward. Therefore, the positive electrode 11 with a separator is supplied to the support portion 27 in the first region Rp1, and the positive electrode 11 with a separator is pushed out toward the stacked portion 34 in the second region Rp2. For example, even when the positive electrode with separator 11 is not supplied at a constant interval, the positive electrode with separator 11 can be sequentially supplied to the plurality of support portions 27 by moving the circulation member 26 in the vertical direction.

  Since the negative electrode transport unit 22 has the same configuration as that of the positive electrode transport unit 21, for example, even when the negative electrode 9 is not supplied at a constant interval, the circulation member 29 is moved in the vertical direction, so that a plurality of the negative electrodes 9 are provided. It becomes possible to supply to the support part 30 in order.

  FIG. 7 is a side view (including a partial cross section) showing an electrode stacking apparatus according to another embodiment. The electrode stacking apparatus 120 of this embodiment has the same configuration as the electrode stacking apparatus 20 of FIG. 3 except that the stacking unit 125 is provided instead of the stacking unit 25. The stacked unit 125 includes a stacked unit 134 instead of the stacked unit 34. The stacked portion 134 includes a plurality of bases 42 and positioning side plates 145 and 146 (side walls) that are connected to the edges of the bases 42 and position the positive electrode 11 with separator and the negative electrode 9. The positioning side plates 145 and 146 are arranged to face each other. The positioning side plate 145 is disposed between the positive electrode transport unit 21 and the base 42 so as to intersect the traveling direction of the positive electrode pusher 36. The positioning side plate 145 has slits 145a through which the separator-equipped positive electrodes 11 pass. The positioning side plate 146 is disposed between the negative electrode transport unit 22 and the base 42 so as to intersect the traveling direction of the negative electrode pusher 37. In the positioning side plate 146, slits 146a through which the negative electrodes 9 pass are formed.

  Also in the electrode laminating apparatus 120, the side parts 53, 53 of the positive pusher 36 collide with the positioning side plate 145 of the laminated part 134 and are deformed. Therefore, since the extrusion part 52 can further advance in the advancing direction of the positive electrode pusher 36, the positive electrode 11 with a separator is pushed in sufficiently deeply. Furthermore, when the positive electrode pusher 36 is retracted and the side portions 53 and 53 are separated from the stacked portion 34, the side portions 53 and 53 can return to their original positions. Similar to the positive electrode pusher 36, the plurality of side portions of the negative electrode pusher 37 collide with the positioning side plate 146 of the stacked portion 134 and deform. As a result, the negative electrode 9 can be pushed in sufficiently deeply.

  FIG. 8 is a schematic view showing a state in which the positive electrode 11 with a separator is pushed out toward the laminated portion 34 by the positive electrode pusher 136 according to the modification. FIG. 9 is a schematic diagram illustrating a state in which the side portion 153 of the positive electrode pusher 136 according to the modification collides with the stacked portion 34 and is deformed. 8 and 9, (A) is a top view and (B) is a side view. The positive electrode pusher 136 includes a pair of pressing members 138 and 138 and a single drive unit 39 that moves the pressing members 138 relative to the stacked unit 34 so as to advance and retract. The drive unit 39 is connected to each pressing member 138 via a rod 51 that can expand and contract in the traveling direction (X direction) of the positive pusher 136.

  The pressing member 138 is a side that positions the positive electrode 11 with the separator in the width direction (Y direction) of the positive electrode 11 with the separator that intersects the advancing direction (X direction) of the positive electrode pusher 136 and the pushing portion 52 that extrudes the positive electrode 11 with the separator. Part 153. The side portion 153 is connected to the extrusion portion 52 and extends in the traveling direction (X direction) of the positive electrode pusher 136. When the positive electrode 11 with separator is pushed out, the side portion 153 collides with the side wall 45 of the stacked portion 34, whereby the positive electrode pusher 136 is deformed. The extruding part 52 extends in the width direction (Y direction) of the positive electrode 11 with the separator intersecting the traveling direction (X direction) of the positive electrode pusher 136 and has an extruding surface that contacts the positive electrode 11 with separator. The traveling direction of the positive electrode pusher 136 and the width direction of the positive electrode with separator 11 intersecting the traveling direction intersect each other in the stacking direction (Z direction) of the positive electrode with separator 11 and the negative electrode 9. The side part 153 does not have the extrusion surface which extrudes the positive electrode 11 with a separator. The side portion 153 protrudes forward from the pushing portion 52 toward the laminated portion 34 in the traveling direction of the positive electrode pusher 136. The side portions 153 and 153 are arranged to face each other across the positive electrode with separator 11 in the width direction of the positive electrode with separator 11 intersecting the traveling direction of the positive electrode pusher 136. The side portions 153 and 153 are separated from each other by a predetermined interval while the separator-attached positive electrode 11 is pushed out. The said space | interval is the same as the width | variety of the separator 10 of the positive electrode 11 with a separator. Thereby, the positive electrode 11 with a separator is positioned in the Y direction. The side part 153 has elasticity in the width direction of the positive electrode 11 with a separator that intersects the traveling direction of the positive electrode pusher 136. The side portion 153 is a rubber member, for example, but may be a member including a spring.

  As shown in FIG. 8, the positive electrode pusher 136 pushes the positive electrode 11 with a separator toward the laminated portion 34 in a state where the positive electrode 11 with a separator is disposed between the side portions 153 and 153. When the side portion 153 of the positive electrode pusher 136 collides with the stacked portion 34, the pushing portion 52 of the positive electrode pusher 136 contacts the stacked portion 34 with the side portion 153 contacting the stacked portion 34, as shown in FIG. 9. The side part 153 is deformed. When the extruding part 52 comes into contact with the laminated part 34, the progress of the positive electrode pusher 136 is stopped. In the present modification, the side portion 153 is curved in the width direction of the positive electrode 11 with the separator intersecting with the traveling direction of the positive electrode pusher 136 by being pressed by the stacked portion 34. The side portion 153 may include a tip having a guide surface 153 a that guides the stacked portion 34. The guide surface 153 a is inclined so that the side portion 153 is tapered with respect to the traveling direction of the positive electrode pusher 136. Thereby, the laminated portion 34 enters between the plurality of side portions 153 and 153, and the side portions 153 and 153 are easily deformed in the width direction of the positive electrode 11 with the separator intersecting with the traveling direction of the positive electrode pusher 136. When the positive electrode pusher 136 moves backward and the side portion 153 moves away from the stacked portion 34, the side portion 153 returns to the original position (see FIG. 8).

  Similar to the positive electrode pusher 136, the negative electrode pusher may include an extrusion portion that extrudes the negative electrode 9 and a plurality of side portions that collide with the stacked portion 34 when the negative electrode 9 is extruded. When such a negative electrode pusher is used, the same effect as the positive electrode pusher 136 can be obtained. 8 and 9, the stacked unit 134 of FIG. 7 may be used instead of the stacked unit 34.

  FIG. 10 is a schematic plan view showing a modification of the movement path of the side portions 53 of the positive electrode pusher 36. As FIG. 10 shows, the side parts 53 and 53 of the positive electrode pusher 36 may move so that it may mutually approach as the positive electrode 11 with a separator is extruded. The movement path K1 of one pressing member 38 is inclined with respect to the movement path K2 of the other pressing member 38. Thereby, positioning of the positive electrode 11 with a separator in the width direction of the positive electrode 11 with a separator crossing the advancing direction of the positive electrode pusher 36 can be performed while extruding the positive electrode 11 with a separator. As a result, it becomes possible to improve the lamination speed of the positive electrode 11 with a separator.

  Similarly, for the positive electrode pusher 136 shown in FIGS. 8 and 9, the side portions 153 and 153 may move so as to approach each other as the positive electrode 11 with separator is pushed out. Further, like the positive electrode pushers 36 and 136, the plurality of side portions of the negative electrode pusher 37 may move so as to approach each other as the negative electrode 9 is pushed out. Thereby, the lamination speed of the negative electrode 9 can be improved.

  As mentioned above, although preferred embodiment of this invention was described in detail, this invention is not limited to the said embodiment.

  For example, in the positive pusher 36 shown in FIGS. 5 and 6, a pair of pressing members 38 are driven in synchronization by a plurality of drive units 39, 39, but as shown in FIGS. 8 and 9, 1 The two drive units 39 may be simultaneously driven. Conversely, in the positive pusher 136 shown in FIGS. 8 and 9, the pair of pressing members 138 may be driven in synchronization by a plurality of drive units 39, 39 that can be driven independently of each other. The same applies to the negative electrode pusher.

  Moreover, in the said embodiment, although the positive electrode pusher 36 has the some side parts 53 and 53, you may have the single side part 53. FIG. Similarly, although the positive electrode pusher 136 has a plurality of side portions 153 and 153, the positive electrode pusher 136 may have a single side portion 153.

  Moreover, in the said embodiment, although the extrusion part 52 and the side part 53 of the positive electrode pusher 36 are separate members, the extrusion part 52 and the side part 53 may be an integral member. For example, you may use an elastic member for the connection location of the rod 51 and the extrusion part 52. FIG. In this case, the pushing part 52 and the side part 53 move with respect to the rod 51. For example, the pushing portion 52 and the side portion 53 slide with respect to the rod 51 in the traveling direction (X direction) of the positive electrode pusher 36 or in the width direction (Y direction) of the positive electrode 11 with the separator intersecting the traveling direction of the positive electrode pusher 36. . Similarly, the extrusion part 52 and the side part 153 of the positive electrode pusher 136 may be an integral member.

  Further, in the above-described embodiment, the electrode stacking apparatus 20 includes the positive electrode transport unit 21 and the negative electrode transport unit 22, and the positive electrode 11 with the separator transported by the positive electrode transport unit 21 is pushed out toward the stacked portion 34 by the positive electrode pusher 36. In addition, the negative electrode 9 conveyed by the negative electrode conveyance unit 22 is pushed out toward the laminated portion 34 by the negative electrode pusher 37, but the form is not particularly limited. The present invention is also applicable to an electrode laminating apparatus that pushes an electrode conveyed by, for example, a P & P (pick and place) method toward a laminating portion by a pusher.

  Moreover, in the said embodiment, although the positive electrode 8 with the separator and the negative electrode 9 which are the states in which the positive electrode 8 was wrapped in the bag-shaped separator 10 are alternately laminated | stacked on the lamination | stacking part 34, this invention, Electrode laminating apparatus in which negative electrodes with separators in a state where the negative electrode is wrapped in a bag-like separator are alternately laminated in a laminated portion, and positive electrodes and negative electrodes are alternately laminated in a laminated portion with a sheet-like separator interposed therebetween The present invention can also be applied to an electrode stacking device, an electrode stacking device in which a plurality of positive electrodes are stacked in a stacked portion, an electrode stacking device in which a plurality of negative electrodes are stacked in a stacked portion.

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

  DESCRIPTION OF SYMBOLS 9 ... Negative electrode (electrode), 11 ... Positive electrode (electrode) with a separator, 20, 120 ... Electrode laminating device, 21 ... Positive electrode conveyance unit (conveyance part), 22 ... Negative electrode conveyance unit (conveyance part), 26, 29 ... Circulation member , 26b, 29b ... outer peripheral surface, 27, 30 ... support part, 34, 134 ... laminated part, 34a ... gap, 36, 136 ... positive electrode pusher, 37 ... negative electrode pusher, 52 ... extrusion part, 53, 153 ... side part, 54 ... elastic members, 145 and 146 ... positioning side plates (side walls), Rp1, Rn1 ... first region, Rp2, Rn2 ... second region.

Claims (6)

A laminated portion having a side wall and where the electrodes are laminated;
A pusher that pushes the electrode toward the laminated portion;
With
The pusher has an extruding part for extruding the electrode, and a side part for positioning the electrode in the width direction of the electrode intersecting the traveling direction of the pusher;
The electrode stacking apparatus, wherein the pusher is deformed when the side portion collides with the stacked portion when the electrode is pushed out.   The side part is connected to the extrusion part via an elastic member, and the side part relatively moves with respect to the extrusion part when the side part collides with the side wall of the stacked part. 2. The electrode stacking apparatus according to 1.   The electrode stacking apparatus according to claim 1, wherein the pusher has a plurality of side portions, and the plurality of side portions move so as to approach each other as the electrodes are pushed out.   The electrode lamination apparatus according to any one of claims 1 to 3, wherein the side portion has elasticity in a traveling direction of the pusher.   The electrode stacking apparatus according to claim 1, further comprising a plurality of stacked portions, wherein a gap through which the electrode passes is provided between the plurality of stacked portions. A transport unit for transporting the electrode;
The transport unit includes a circulation member that has an outer peripheral surface that circulates so as to form a circulation path that descends after being lifted and is movable in the vertical direction, and a support unit that supports the electrode.
The support portion is provided on the outer peripheral surface of the circulation member,
The electrode is supplied to the support portion in a first region of the circulation path where the outer peripheral surface rises, and is directed to the stacked portion in a second region of the circulation path where the outer peripheral surface descends. The electrode stacking apparatus according to claim 1, wherein the electrode stacking apparatus is extruded.

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