JP2020035719A - Laminate manufacturing device - Google Patents

Abstract

To provide a laminate manufacturing device that can reduce a machine cycle time.SOLUTION: A laminate manufacturing device 100 is a device that manufactures a laminate in which first electrodes and second electrodes are alternately laminated, and includes a transfer arm that holds the first electrode and the second electrode, and a stage having a stage surface on which the first electrode and the second electrode held by the transfer arm are sequentially stacked, and the transfer arm includes a first holding unit that holds the first electrode, a second holding unit that holds the second electrode such that the second electrode is superimposed on the held first electrode in a state where the first electrode is held by the first holding unit, and a transport mechanism that transports the set of the held first and second electrodes to the stage surface.SELECTED DRAWING: Figure 4

Description

  One aspect of the present invention relates to a laminate manufacturing apparatus.

  2. Description of the Related Art Conventionally, a laminating apparatus for alternately laminating first electrodes sandwiched between separators and second electrodes having different polarities from the first electrodes has been known. The laminating apparatus disclosed in Patent Document 1 has a first table on which a first electrode is mounted, a second table on which a second electrode is mounted, and a first electrode and a second electrode alternately stacked. And a stacking table. In this laminating apparatus, a first gripper that grips a first electrode placed on a first table and a second gripper that grips a second electrode placed on a second table hold the first electrode on the laminate table. The first electrodes and the second electrodes are alternately stacked.

JP 2012-227130 A

  However, in the device disclosed in Patent Literature 1, the stacking operation by the first gripper and the second gripper is repeated the same number of times as the number of electrodes to be stacked. It is difficult to shorten the time.

  An object of one aspect of the present invention is to provide a laminate manufacturing apparatus capable of reducing a machine cycle time.

  A stacked body manufacturing apparatus according to one aspect of the present invention is an apparatus for manufacturing a stacked body in which first electrodes and second electrodes are alternately stacked, and includes a transfer arm that holds the first electrode and the second electrode. A stage having a stage surface on which the first electrode and the second electrode held by the transfer arm are sequentially stacked, wherein the transfer arm includes a first holding unit that holds the first electrode, and a first holding unit that holds the first electrode. In a state where the first electrode is held, a second holding unit that holds the second electrode such that the second electrode is superimposed on the held first electrode, and the first electrode and the second electrode that are held. A transport mechanism for transporting the set of electrodes to the stage surface.

  In the above-described laminate manufacturing apparatus, the first electrode is held by the first holding unit provided on the transfer arm, and then the second electrode is held by the second holding unit so as to overlap the first electrode. The first electrode and the second electrode held in a superimposed state by the transfer arm are sequentially stacked on the stage surface by the transfer mechanism. As described above, since the first electrode and the second electrode are overlapped by the transfer arm in advance, the number of times that the transfer arm stacks the electrodes on the stage surface is half the number of the stacked first and second electrodes. Becomes Therefore, the machine cycle time can be reduced as compared with the case where the first electrode is stacked on the stage and then the second electrode is stacked on the stage.

  The first holding portion may be a first support piece that supports the first electrode from below, and the second holding portion may be a second support piece that supports the second electrode from below. According to this configuration, it is easy to simultaneously hold the first electrode and the second electrode in a state where the first electrode and the second electrode overlap.

  The first holding unit may be a suction device that suctions the first electrode from above, and the second holding unit may be a support piece that supports the second electrode from below. According to this configuration, it is easy to simultaneously hold the first electrode and the second electrode in a state where the first electrode and the second electrode overlap.

  The stage has a pressing portion that presses the set of the first electrode and the second electrode transferred to the stage surface by the transfer arm toward the stage surface, and the stage is provided above the first electrode held by the transfer arm. A space adjacent to the upper surface of the first electrode and through which the pressing portion can be inserted may be provided. With this configuration, the pressing portion can be inserted into the space above the first electrode in a state where the first electrode and the second electrode are held by the transfer arm. In this case, the pressing unit can press the first electrode and the second electrode held by the transfer arm toward the stage surface.

  According to one aspect of the present invention, there is provided a laminate manufacturing apparatus capable of reducing a machine cycle time.

FIG. 3 is a cross-sectional view illustrating the inside of a power storage device. FIG. 2 is a sectional view taken along line II-II of FIG. 1. It is a plane schematic diagram showing a layered product manufacturing device. It is a figure explaining the turntable and the laminating apparatus (holding apparatus) which comprise a laminated body manufacturing apparatus. It is a figure explaining a stage which constitutes a layered product manufacturing device. It is a figure which shows the process of lamination by a laminated body manufacturing apparatus. It is a figure which shows the process of lamination by a laminated body manufacturing apparatus. It is a figure which shows the process of lamination by a laminated body manufacturing apparatus. It is a figure which shows the process of lamination by a laminated body manufacturing apparatus. It is a figure which shows the process of lamination by a laminated body manufacturing apparatus. It is a figure which shows the process of lamination by a laminated body manufacturing apparatus. It is a figure which shows the process of lamination by a laminated body manufacturing apparatus. It is a figure showing the lamination process by the laminated body manufacturing device concerning other forms. It is a figure showing the lamination process by the laminated body manufacturing device concerning other forms. It is a figure showing the lamination process by the laminated body manufacturing device concerning other forms. It is a figure showing the lamination process by the laminated body manufacturing device concerning other forms. It is a figure showing the lamination process by the laminated body manufacturing device concerning other forms.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements have the same reference characters allotted, and overlapping description will be omitted.

  First, a power storage device including a stack manufactured by the stack manufacturing apparatus according to one embodiment will be described. FIG. 1 is a cross-sectional view illustrating the inside of the power storage device. FIG. 2 is a sectional view taken along line II-II of 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 case 2 having a substantially rectangular parallelepiped shape, and an electrode assembly 3 housed in the case 2. The case 2 is formed of a metal such as aluminum. Although not shown, for example, a non-aqueous (organic solvent) electrolytic solution is injected into the case 2. On the case 2, the positive terminal 4 and the negative terminal 5 are arranged apart from each other. The positive terminal 4 is fixed to the case 2 via an insulating ring 6, and the negative terminal 5 is fixed to the case 2 via an insulating ring 7. An insulating film is disposed between the electrode assembly 3 and the inner side surface and the bottom surface of the case 2, and the case 2 and the electrode assembly 3 are insulated by the insulating film. In FIG. 1, for the sake of convenience, a slight gap is provided between the lower end of the electrode assembly 3 and the bottom surface of the case 2, but in reality, the lower end of the electrode assembly 3 is placed inside the case 2 via an insulating film. Is in contact with the bottom of

  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-shaped separator 10. The positive electrode 8 wrapped in the bag-like 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 positive electrodes 11 with separators 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 has a metal foil 14 as a positive electrode current collector 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 rectangular foil main body part 14a in a plan view and a tab 14b integrated with the foil main body part 14a. The tab 14b protrudes from an edge near one end in the longitudinal direction of the foil main body 14a. The tab 14b penetrates through the separator 10. The plurality of tabs 14 b extending from the plurality of positive electrodes 8 are connected (welded) to the conductive member 12 in a state where the foils are collected, and are connected to the positive electrode terminal 4 via 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 the front and back surfaces of the foil body 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 a composite oxide, metallic lithium, and sulfur. The composite oxide contains, for example, at least one of manganese, nickel, cobalt, and aluminum and lithium.

  The negative electrode 9 has a metal foil 16 as a negative electrode current collector made of, for example, a copper foil, and negative electrode active material layers 17 formed on both surfaces of the metal foil 16. The metal foil 16 has a foil main body 16a having a rectangular shape in plan view, and a tab 16b integrated with the foil main body 16a. The tab 16b protrudes from an edge near one end in the longitudinal direction of the foil main body 16a. The tab 16b is connected to the negative terminal 5 via 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 front and back surfaces of the foil main body 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 graphite, highly oriented graphite, mesocarbon microbeads, carbon such as hard carbon and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5 ≦ x ≦ 1.5 ) And boron-added carbon.

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

  In the case of manufacturing the power storage device 1 configured as described above, first, the positive electrode 11 with the separator and the negative electrode 9 are manufactured, and then the positive electrode 11 with the separator and the negative electrode 9 are alternately laminated to form the positive electrode 11 with the separator and the negative electrode 9. Is fixed to obtain the electrode assembly 3. Then, the tab 14b of the positive electrode 11 with separator is connected to the positive terminal 4 via the conductive member 12, and the tab 16b of the negative electrode 9 is connected to the negative terminal 5 via the conductive member 13. 2 For example, in the manufacturing process of the positive electrode 11 with a separator, more specifically, a strip-shaped electrode base material provided with an active material layer is manufactured, and the electrode base material is cut to manufacture the positive electrode 8. Will be By wrapping the manufactured positive electrode 8 with a separator, the positive electrode 11 with a separator is manufactured.

  Next, the laminated body manufacturing apparatus 100 according to the embodiment will be described with reference to FIG. FIG. 3 is a schematic plan view showing the laminated body manufacturing apparatus 100. As shown in FIG. 3, the laminated body manufacturing apparatus 100 includes a positive electrode transport system 101, a negative electrode transport system 103, a laminating apparatus 105, and a stage 107. In the laminate manufacturing apparatus 100, a positive electrode (first electrode) 11 with a separator transported by a positive electrode transport system 101 and a negative electrode (second electrode) 9 transported by a negative electrode transport system 103 are alternately laminated. That is, the stacked body manufacturing apparatus 100 forms the stacked body 30 for manufacturing the electrode assembly 3.

  The positive electrode transfer system 101 includes a transfer device 111, a pick and place device 113, and a turntable 115. The transport device 111 transports the positive electrode with separator 11 manufactured in the previous process along a predetermined transport route. The transport device 111 may be, for example, a belt conveyor. The pick-and-place device 113 moves the positive electrode with separator 11 transported by the transport device 111 to the turntable 115. The turntable 115 conveys the positive electrode with separator 11 received from the pick and place device 113 in the circumferential direction. The positive electrode with separator 11 transported to a predetermined position by the rotating table 115 is collected by the laminating apparatus 105. As an example, the rotary table 115 operates intermittently so as to repeat a rotation operation at a predetermined angle and a stop. The pick-and-place device 113 transfers the positive electrode with separator 11 to the turntable 115 when the turntable 115 is stopped. In addition, the stacking device 105 collects the separator-equipped positive electrode 11 from the turntable 115 when the turntable 115 is stopped.

  FIG. 4 is a diagram illustrating a turntable and a laminating apparatus that constitute the laminated body manufacturing apparatus. FIG. 4A is a side view showing a position where the turntable 115 and the stacking device 105 overlap in the vertical direction. FIG. 4B is a plan view of the holding device 155 included in the stacking device 105 as viewed from below. As shown in FIGS. 3 and 4A, the rotary table 115 includes a disk-shaped table main body 116 that rotates in a horizontal plane, and a plurality of electrode mounting portions 117 provided on the table main body 116. In. The plurality of electrode placement portions 117 are arranged evenly in the circumferential direction on the table main body 116. Each of the electrode mounting portions 117 includes an XYθ table 117a and a suction pad 117b provided on the XYθ table 117a. Table 117a controls the position of suction pad 117b in the X direction in the horizontal plane, the position in the Y direction intersecting (orthogonal to) the X direction, and the rotational position about the Z axis as the center of rotation. The suction pad 117b receives the positive electrode 11 with a separator from the pick and place device 113. That is, the pick-and-place device 113 places the positive electrode 11 with the separator on the suction pad 117b. Table 117a adjusts the position of suction pad 117b according to the position of positive electrode 11 with separator on suction pad 117b after suction pad 117b receives positive electrode 11 with separator. Thereby, the stacking apparatus 105 can receive the separator-attached positive electrode 11 from each of the electrode mounting portions 117 under the same conditions.

  The negative electrode transport system 103 includes a transport device 131, a pick-and-place device 133, and a turntable 135, as in the positive electrode transport system 101. The transport device 131 transports the negative electrode 9 manufactured in the previous process along a predetermined transport route. The transport device 131 may be, for example, a belt conveyor. The pick-and-place device 133 moves the negative electrode 9 transported by the transport device 131 to the turntable 135. The turntable 135 conveys the negative electrode 9 received from the pick-and-place device 133 in the circumferential direction. The negative electrode 9 transported to a predetermined position by the turntable 135 is collected by the stacking device 105. In this embodiment, the laminating apparatus 105 collects the negative electrode 9 from the turntable 135 after collecting the separator-equipped positive electrode 11 from the turntable 115. The configuration of the turntable 135 is the same as that of the turntable 115, and a detailed description thereof will be omitted.

  As shown in FIGS. 3 and 4A, the laminating apparatus 105 includes a disk-shaped rotating body (transporting mechanism) 151 rotating in a horizontal plane, and a plurality of transport arms 152 projecting radially from the rotating body 151. And The plurality of transfer arms 152 are arranged, for example, uniformly in the circumferential direction. Each of the transfer arms 152 includes a Z table (transfer mechanism) 153 and a holding device 155 provided below the Z table 153. The Z table 153 moves the holding device 155 in the Z direction (ie, the vertical direction).

  The holding device 155 includes a main body 156, a pair of first support pieces (first holding sections) 157, and a pair of second support pieces (second holding sections) 158. The main body 156 has, for example, a substantially rectangular shape in plan view. The upper surface of the main body 156 is fixed to the lower surface of the Z table 153. As illustrated in FIG. 4B, a plurality of (four in the illustrated example) grooves 156 a, 156 b, 156 c, and 156 d formed upward are formed on the lower surface of the main body 156. The grooves 156a, 156b, 156c, 156d extend from the center of each of four sides defining the periphery in plan view toward the center of the main body 156.

  The first support piece 157 includes a vertical portion 157a extending in the vertical direction, and a horizontal portion 157b extending horizontally from the tip of the vertical portion 157a. The pair of first support pieces 157 are arranged, for example, at point-symmetric positions where the center of the main body 156 is a symmetric point in plan view. The second support piece 158 includes a vertical portion 158a extending in the vertical direction, and a horizontal portion 158b extending horizontally from the tip of the vertical portion 158a. The pair of second support pieces 158 are arranged, for example, at point-symmetric positions where the center of the main body 156 is a symmetric point in plan view. In the illustrated example, the first support piece 157 and the second support piece 158 arranged on one side in the Y direction are opposed to each other with the groove 156a interposed therebetween, and the first support piece 157 and the second support piece arranged on the other side in the Y direction. The piece 157 and the second support piece 158 face each other across the groove 156c. Further, the first support piece 157 and the second support piece 158 arranged on one side in the X direction are arranged with the groove 156b interposed therebetween, and the first support piece 157 and the second support piece 157 arranged on the other side in the X direction. The second support piece 158 is arranged with the groove 156d interposed therebetween.

  The first support piece 157 and the second support piece 158 are driven and controlled in the vertical and horizontal directions. For example, in FIG. 4A, the first support piece 157 is located at a position close to the main body 156 in the vertical direction and is located inside in the horizontal direction (hereinafter, this state is referred to as a “holding state”). There is). In the holding state, the positive electrode 11 with the separator is supported from below by the horizontal portion 157b of the first support piece 157. Further, in FIG. 4A, the second support piece 158 is located at a position separated from the main body 156 in the vertical direction and located outside in the horizontal direction (hereinafter, this state is referred to as a “released state”). In some cases). The first support piece 157 and the second support piece 158 can be in a holding state and a release state, respectively.

  The second support piece 158 in the release state shown in the figure moves from the release state to the holding state by moving upward after the second support piece 158 horizontally moves inward. The first support piece 157 in the holding state shown in the figure moves downward from the holding state to the release state by moving downward after the first support piece 157 horizontally moves outward. In a plan view, the horizontal portion 157b of the first support piece 157 in the holding state overlaps with a position where the electrode (the positive electrode 11 with a separator in the illustrated example) is held. In a plan view, the horizontal portion 158b of the second support piece 158 in the released state is separated from the position where the electrode is held. In FIG. 4B, the positions of the held electrodes are indicated by broken lines.

  FIG. 5 is a diagram for explaining a stage. 5A is a plan view of the stage, FIG. 5B is a sectional view taken along line bb of FIG. 5A, and FIG. 5C is a sectional view of FIG. It is sectional drawing along the cc line of (a). The stage 107 includes, for example, a stage main body 171 having a rectangular plate shape. The upper surface of the stage body 171 is a stage surface 171a on which the positive electrode 11 with separator and the negative electrode 9 held by the transfer arm 152 are sequentially stacked. The stage 107 includes a pair of first pressing pieces (first pressing portions) 173 and a pair of second pressing pieces (first pressing pieces) 173 that press the separator-equipped positive electrode 11 and negative electrode 9 stacked on the stage surface 171a toward the stage surface 171a. (Second pressing portion) 175.

  The first pressing piece 173 includes a vertical portion 173a extending in the vertical direction, and a horizontal portion 173b extending in the horizontal direction from the tip of the vertical portion 173a. The pair of first pressing pieces 173 are arranged at positions facing each other with the center of the stage main body 171 interposed therebetween in a plan view, for example. In the illustrated example, the first pressing pieces 173 are arranged apart from each other in the Y direction. The second pressing piece 175 includes a vertical portion 175a extending in the vertical direction, and a horizontal portion 175b extending horizontally from the tip of the vertical portion 175a. The pair of second pressing pieces 175 are arranged, for example, at positions facing each other with the center of the stage main body 171 therebetween in plan view. In the illustrated example, the second pressing pieces 175 are arranged apart from each other in the X direction. The first pressing piece 173 and the second pressing piece 175 are driven and controlled in the vertical and horizontal directions, similarly to the first supporting piece 157 and the second supporting piece 158. As a result, the first pressing piece 173 and the second pressing piece 175 are separated from the pressed state in which the stacked set of the positive electrode 11 and the negative electrode 9 with the separator are pressed against the stage surface 171a, and separated from the set of the positive electrode 11 and the negative electrode 9 with the separator. The separated state can be taken.

  In plan view, the position of the first pressing piece 173 (see FIG. 5A) corresponds to the position of the grooves 156b and 156d of the main body 156 of the holding device 155 (see FIG. 4B). . The positions of the second pressing pieces 175 correspond to the positions of the grooves 156a and 156c of the main body 156. When the positive electrode 11 with a separator is held by the transfer arm 152, the grooves 156a to 156d of the main body form a space adjacent to the upper surface of the positive electrode 11 with the separator. In the separated state, the horizontal portion 173b of the first pressing piece 173 and the horizontal portion 175b of the second pressing piece 175 can be inserted into this space.

  Next, operations of the laminating apparatus and the stage in the laminated body manufacturing apparatus will be described. 6 to 13 are diagrams showing the steps of lamination by the laminate manufacturing apparatus. FIGS. 6 to 9A are side views of the holding device 155, and FIGS. 6 to 9B are plan views of the holding device 155 as viewed from above. 6 to 9B, the main body 156 is indicated by a two-dot chain line. FIG. 10A is a side view of the stage 107, and FIG. 10B is a plan view of the stage 107. 11A is a side view showing the holding device 155 and the stage 107, FIG. 11B is a plan view of FIG. 11A, and FIG. 11C is a plan view of FIG. It is sectional drawing along the cc line of b). 12A is a side view showing the holding device 155 and the stage 107, FIG. 12B is a plan view of FIG. 12A, and FIG. 12C is a plan view of FIG. It is sectional drawing along the cc line of b). 13A is a side view showing the holding device 155 and the stage 107, FIG. 13B is a plan view of FIG. 11A, and FIG. 13C is a plan view of FIG. It is sectional drawing along the cc line of b).

  As described above, in the stacking apparatus 105, the positive electrode 11 and the negative electrode 9 with the separator are sequentially held by the plurality of transfer arms 152. First, the holding device 155 waits with both the first support piece 157 and the second support piece 158 released. When the holding device 155 moves above the electrode mounting portion 117, the holding device 155 moves downward by operating the Z table 153. When the position of the horizontal portion 157b of the first support piece 157 moves to a position below the separator-equipped positive electrode 11 placed on the electrode placement section 117, the first support piece 157 is controlled to be in a holding state. . Thereby, as shown in FIG. 6, the positive electrode 11 with a separator is held by the first support piece 157.

  Subsequently, as the rotating body 151 of the stacking device 105 rotates, the holding device 155 holding the positive electrode 11 with the separator moves to above the electrode mounting portion (not shown) on the negative electrode transport system 103 side. When the holding device 155 moves above the electrode mounting portion, the holding device 155 moves downward by operating the Z table 153. As shown in FIG. 7A, the position of the horizontal part 158b of the second support piece 158 moves to a position below the negative electrode 9 placed on the electrode placement part. In this state, as shown in FIG. 7B, the negative electrode 9 and the second support piece 158 do not interfere with each other. Subsequently, the second support piece 158 is controlled to be in a holding state. Thereby, as shown in FIG. 8, the negative electrode 9 is held by the second support piece 158. The second support piece 158 holds the negative electrode 9 so that the negative electrode 9 is superimposed on the positive electrode with separator 11 held by the first support piece 157.

  Subsequently, as shown in FIG. 9, the first support piece 157 is released. In this state, the positive electrode 11 with the separator is held by the second support piece 158 via the negative electrode 9. Subsequently, as the rotating body 151 of the stacking device 105 rotates, the holding device 155 holding the set of the positive electrode 11 with separator and the negative electrode 9 moves above the stage surface 171a. The release of the first support piece 157 may be performed after the holding device 155 has moved above the stage surface 171a.

  Subsequently, a set of the positive electrode 11 with separator and the negative electrode 9 is stacked on the stage surface 171a. As shown in FIG. 10, in one example, a plurality of sets of the positive electrode 11 with separator and the negative electrode 9 are already stacked on the stage surface 171a. A plurality of sets (laminated body 30 in the drawing) of the positive electrode 11 and the negative electrode 9 with a separator stacked on the stage surface 171a are pressed toward the stage surface 171a by the first pressing piece 173 in a pressed state, for example. I have. In this case, the second pressing piece 175 is in a separated state. As the Z table 153 of the stacking device 105 moves downward, the set of the positive electrode 11 with the separator and the negative electrode 9 held by the holding device 155 approaches the stacked body 30. In this state, the height position of the horizontal portion 175b of the second pressing piece 175 is substantially the same as the height position of the horizontal portion 157b of the first support piece 157 (see FIG. 11C).

  Subsequently, the set of the positive electrode 11 with the separator and the negative electrode 9 held by the holding device 155 is pressed toward the stacked body 30 by the second pressing piece 175 by the second pressing piece 175 being pressed. In this case, the horizontal portion 175b of the second pressing piece 175 moves inside the grooves 156a and 156c of the main body 156, thereby moving above the set of the positive electrode 11 and the negative electrode 9 with the separator.

  Subsequently, the second support piece 158 is released, and the first pressing piece 173 is separated. That is, the second support piece 158 and the first pressing piece 173 located between the stacked body 30 and the set of the positive electrode 11 and the negative electrode 9 with the separator are pulled out. Thereby, as shown in FIG. 13, the stacked body 30 is formed on the stage surface 171a. By repeating the above operation by the plurality of holding devices 155, the set of the positive electrode 11 with the separator and the negative electrode 9 is sequentially stacked. When the next holding device 155 moves onto the stage surface 171a, the stacked body 30 is pressed by the second pressing piece 175, as shown in FIG. Therefore, the set of the positive electrode 11 and the negative electrode 9 with the separator newly laminated on the laminate 30 is pressed by the first pressing piece 173.

  According to the laminated body manufacturing apparatus described above, the positive electrode 11 with the separator is held by the first pressing piece 173 provided on the transfer arm 152, and then the negative electrode by the second support piece 158 is overlapped with the positive electrode 11 with the separator. 9 is retained. The positive electrode 11 with separator and the negative electrode 9 held in a state of being superimposed by the transfer arm 152 are sequentially stacked on the stage surface 171a with the operation of the rotating body 151 and the Z table 153. In the embodiment, the positive electrode 11 with the separator and the negative electrode 9 are overlapped by the transfer arm 152 in advance. Therefore, the number of times that the transfer arm 152 stacks the electrodes on the stage surface 171a is half the number of the stacked electrodes. Therefore, the machine cycle time can be reduced as compared with the case where the positive electrode 11 with the separator is stacked on the stage, and then the negative electrode 9 is stacked on the stage.

  The first support piece 157 supports the positive electrode 11 with a separator from below, and the second support piece 158 supports the negative electrode 9 from below. According to this configuration, it is easy to simultaneously hold the positive electrode 11 with the separator and the negative electrode 9 in a state where the positive electrode 11 with the separator and the negative electrode 9 overlap.

  Above the positive electrode with separator 11 held by the transfer arm 152, the horizontal portion 173 b of the first pressing piece 173 and the horizontal portion 175 b of the second pressing piece 175 can be inserted adjacent to the upper surface of the positive electrode with separator 11. Spaces (grooves 156a to 156d) are provided. In this configuration, the horizontal portions 173b and 175b can be inserted into the space above the positive electrode 11 with the separator while the positive electrode 11 with the separator and the negative electrode 9 are held by the transfer arm 152. In this case, the horizontal parts 173b and 175b can press the positive electrode 11 and the negative electrode 9 with the separator held by the transfer arm 152 toward the stage surface 171a from above.

[Second embodiment]
In the present embodiment, the configuration of the first holding unit that holds the positive electrode 11 with a separator is different from that of the first embodiment. Hereinafter, points different from the first embodiment will be mainly described, and the same elements and members will be denoted by the same reference numerals and detailed description thereof will be omitted. Since the device configuration of the present embodiment is the same as the device configuration of the first embodiment, FIGS. 3 and 4 are referred to as schematic diagrams.

  FIG. 14A is a side view of the holding device 255, and FIG. 14B is a plan view of the holding device 255. In FIG. 14B, a part of the configuration is indicated by a two-dot chain line. The holding device 255 includes a main body 256 and a pair of support pieces (second holding portions) 258. The main body 256 has, for example, a substantially rectangular shape in plan view. The upper surface of the main body 256 is fixed to the lower surface of the Z table 153, similarly to the main body 156 in the first embodiment. As shown in FIG. 14, a plurality of (four in the illustrated example) grooves 256 a, 256 b, 256 c, 256 d formed upward are formed on the lower surface of the main body 256. The grooves 256a, 256b, 256c, 256d have the same configuration as the grooves 156a, 156b, 156c, 156d in the first embodiment, and the horizontal portion 173b and the second pressing piece 175 of the first pressing piece 173 of the stage 107. Corresponds to the position of the horizontal portion 175b.

  The lower surface of the main body 256 forms a suction surface (first holding portion) 257. The suction surface 257 is formed with a plurality of suction holes (not shown) connected to a suction pump, and suction force is generated on the suction surface 257 by sucking air from the suction holes. Thus, as an example, the main body 256 functions as an adsorption device. Note that, on the lower surface of the main body 256, no intake hole is formed in a portion where the grooves 256 a to 256 d are formed.

  The support piece 258 has the same configuration as the second support piece 158 in the first embodiment. That is, the support piece 258 includes a vertical portion 258a extending in the vertical direction and a horizontal portion 258b extending horizontally from the tip of the vertical portion 258a. The pair of support pieces 258 are arranged, for example, at point-symmetric positions where the center of the main body 256 is a symmetric point in plan view.

  Hereinafter, the operation of the holding device 255 will be described with further reference to FIGS. FIG. 15A is a side view of the holding device 255, and FIG. 15B is a plan view of the holding device 255. 16A is a side view showing the holding device 255 and the stage 107, FIG. 16B is a plan view of FIG. 16A, and FIG. 16C is a plan view of FIG. It is sectional drawing along the cc line of b). FIG. 17A is a plan view showing the holding device 155 and the stage 107, and FIG. 17B is a cross-sectional view taken along the line bb of FIG.

  First, as shown in FIG. 14, the holding device 255 holds the separator-attached positive electrode 11 by the suction surface 257 of the main body 256. As an example, in a state where the suction surface 257 is in contact with the positive electrode with separator 11 placed on the electrode mounting portion 117 of the positive electrode transport system 101, the holding device 255 sucks the positive electrode with separator 11 from above by the suction surface 257. I do. At this time, the support piece 258 is in the released state.

  Subsequently, as the rotating body 151 rotates, the holding device 255 holding the positive electrode 11 with the separator moves above an electrode mounting portion (not shown) of the negative electrode transport system 103. When the holding device 255 moves above the electrode placement unit, the Z table 153 operates to move the holding device 255 downward. As shown in FIG. 15A, the support piece 258 is controlled to be in a holding state. Thus, the negative electrode 9 is held by the support piece 258. The support piece 258 holds the negative electrode 9 so that the negative electrode 9 is superimposed on the positive electrode with separator 11 held by the suction surface 257.

  Subsequently, a set of the positive electrode 11 with separator and the negative electrode 9 is stacked on the stage surface 171a. As shown in FIG. 16, in one example, a plurality of sets of the positive electrode 11 with separator and the negative electrode 9 are already stacked on the stage surface 171a. The plurality of sets of the positive electrode 11 with separator and the negative electrode 9 stacked on the stage surface 171a are pressed toward the stage surface 171a by, for example, the first pressing piece 173 in a pressed state. As the Z table 153 moves downward, the set of the positive electrode 11 with separator and the negative electrode 9 held by the holding device 255 approaches the stacked body 30. In this state, the height position of the horizontal portion 258b is substantially the same as the height position of the first pressing piece 173. Subsequently, the set of the positive electrode 11 and the negative electrode 9 with the separator held by the holding device 255 is pressed toward the stacked body 30 by the second pressing piece 175 by the second pressing piece 175 being pressed.

  Subsequently, as shown in FIG. 17, the support piece 258 is released, and the first pressing piece 173 is separated. Thus, the stacked body 30 is formed on the stage surface 171a. By repeating the above operation by the plurality of holding devices 255, a set of the positive electrode 11 with the separator and the negative electrode 9 is sequentially stacked. The operation of adsorbing the positive electrode 11 with the separator by the adsorption surface 257 is such that the set of the positive electrode 11 with the separator and the negative electrode 9 is moved toward the laminate 30 by the second pressing piece 175 after the negative electrode 9 is held by the support piece 258. It can be stopped at any timing before it is pressed.

  In the present embodiment, the positive electrode with separator 11 is adsorbed from above by the adsorbing surface 257, and the negative electrode 9 is supported from below by the support piece 258. According to this configuration, it is easy to hold the positive electrode 11 and the negative electrode 9 with the separator that are superimposed on each other.

  9: negative electrode (second electrode), 11: positive electrode with separator (first electrode), 30: laminated body, 100: laminated body manufacturing apparatus, 107: stage, 171a: stage surface, 151: rotating body (conveyance mechanism), 152: transport arm, 153: Z table (transport mechanism), 157: first support piece (first holding section), 158: second support piece (second holding section).

Claims (4)

A stacked body manufacturing apparatus for manufacturing a stacked body in which a first electrode and a second electrode are alternately stacked,
A transfer arm for holding the first electrode and the second electrode;
A stage having a stage surface on which the first electrode and the second electrode held by the transfer arm are sequentially stacked,
The transfer arm,
A first holding unit that holds the first electrode;
A second holding unit that holds the second electrode such that the second electrode is superimposed on the held first electrode while the first electrode is held by the first holding unit;
A transfer mechanism for transferring the held set of the first electrode and the second electrode to the stage surface. The first holding portion is a first support piece that supports the first electrode from below,
The apparatus according to claim 1, wherein the second holding unit is a second support piece that supports the second electrode from below. The first holding unit is a suction device that suctions the first electrode from above,
The apparatus according to claim 1, wherein the second holding unit is a support piece that supports the second electrode from below. The stage has a pressing portion that presses the set of the first electrode and the second electrode transferred to the stage surface by a transfer arm toward the stage surface,
4. The space according to claim 1, wherein a space adjacent to an upper surface of the first electrode and through which the pressing portion can be inserted is provided above the first electrode held by the transfer arm. 5. 3. The laminate manufacturing apparatus according to item 1.

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