JP7750138B2 - Electrode unloading device - Google Patents

Description

The present invention relates to an electrode removal device.

Patent Document 1 discloses an electrode stacking device equipped with a box-shaped electrode storage unit, a transfer device, and an air injection device. The electrode storage unit contains multiple sheet-like electrodes stacked horizontally. The transfer device uses a suction pad to adsorb the upper surface of the electrode in the electrode storage unit and transfers the adsorbed electrode to the stacking table. When the suction pad adsorbs the electrode to be transferred, another electrode may adhere to the underside of the electrode. In this case, the air injection device injects air toward the upper electrode, and as the upper electrode bends due to the air injection pressure, the lower electrode peels off and falls.

JP 2015-082491 A

In the above-mentioned electrode stacking device, the air injection device blows air toward the upper electrode, which can cause the upper electrode to shift from the suction pad due to the air injection pressure. If the electrode shifts position relative to the suction pad, the stacking positions of the electrodes on the stacking table will not be aligned.

This disclosure was developed based on the above circumstances, and aims to prevent the electrode from shifting position relative to the transport device.

The electrode carrying-out device of the present disclosure is
an electrode storage section in which two types of sheet-shaped electrodes having different shapes in plan view are alternately stacked in a horizontal position and stored;
a transfer device that holds, by suction, an uppermost electrode to be transferred among the plurality of electrodes stacked in the electrode storage section, and transfers the electrode to a stacking table for stacking the electrode and a separator;
a detachment device that detaches a non-transfer target electrode from the transfer target electrode by an air jet pressure when the non-transfer target electrode comes into close contact with the lower surface of the transfer target electrode attracted by the transfer device,
the two types of electrodes have exposed portions that are not hidden by the upper electrode when the two types of electrodes are overlapped, and are exposed in a plan view,
When the non-transfer target electrode comes into close contact with the lower surface of the transfer target electrode, the detaching device injects air only toward the exposed portion of the non-transfer target electrode.

With the electrode removal device disclosed herein, the air injection pressure does not act on the target electrode that is attached to the transfer device. Therefore, when air is injected to separate the non-target electrode from the target electrode, the target electrode can be prevented from shifting position relative to the transfer device.

1 is a perspective view of an electrode carrying-out device according to a first embodiment; Perspective diagram showing the shapes of two types of negative electrodes Perspective diagram showing two types of positive electrode shapes FIG. 10 is a perspective view showing a state in which a negative electrode that is not a target for transfer is in close contact with the lower surface of a negative electrode that is a target for transfer that has been lifted by a transfer device. 10 is a side view showing a state in which a negative electrode not to be transferred is in close contact with the lower surface of a negative electrode to be transferred that has been lifted by a transfer device. FIG. 10 is a perspective view showing a state in which a non-transfer target negative electrode is separated from a transfer target negative electrode;

Here, a preferred example of the present disclosure will be described.
The electrode has a substrate, a coated portion where the substrate is coated with a slurry, and an uncoated portion where the substrate is exposed without the slurry being coated, and the exposed portion is formed only in the uncoated portion. Even if the uncoated portion is damaged, it does not affect the power generation function or electromotive function, so even if the air jet pressure acts on the uncoated portion, it does not impair the performance of the electrode.
An electrode carrying-out device in which, when one of the two types of electrodes stacked in the electrode storage section is turned upside down, the uncoated portions of both electrodes have the same shape in a plan view. With this configuration, it is sufficient to prepare only one type of electrode.
The electrode carrying-out device has a notch formed in the uncoated portion that exposes the exposed portion of the uncoated portion of the lower electrode when the two types of electrodes are overlapped. With this configuration, it is not necessary to make the exposed portion a shape that partially protrudes from the outer periphery of the uncoated portion, and therefore it is possible to prevent the exposed portion from being deformed by interference from foreign matter.
The cutout portion is a recessed portion of a linear edge of the outer periphery of the uncoated portion. This configuration makes it easier to visually check the position of the cutout portion and the orientation of the electrode in a plan view, compared to a hole-shaped cutout portion whose opening edge is continuous around the entire periphery.
The electrode carrying-out device includes a guide member that guides the asymmetric electrode that has fallen off the target electrode to a predetermined position in the electrode storage section. With this configuration, the asymmetric electrode that has fallen off the target electrode can be returned to a predetermined position in the electrode storage section.
An electrode carrying-out device in which the guide member is inserted into a guide hole formed in the uncoated portion of the electrode not to be transferred. With this configuration, even if the uncoated portion is damaged, it does not affect the power generation function or electromotive function, so even if the uncoated portion slides against the guide member, the performance of the electrode is not impaired.

[Embodiment 1]
A first embodiment of the present disclosure will be described with reference to FIGS. 1 to 6. Note that the present invention is not limited to these examples, but is defined by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included. In this first embodiment, with regard to the front-to-back direction, the positive direction of the X axis in FIGS. 1 to 6 is defined as the front. With regard to the left-to-right direction, the positive direction of the Y axis in FIGS. 1 to 4 and 6 is defined as the right. The left-to-right direction and the width direction are used synonymously. With regard to the up-down direction, the positive direction of the Z axis in FIGS. 1 to 6 is defined as the up.

The electrode discharge device of this embodiment is used to manufacture a laminated electrode assembly constructed by alternately stacking sheet-shaped negative electrodes 10 and sheet-shaped positive electrodes 20 with sheet-shaped separators 55 sandwiched between them. The electrode discharge device comprises a stacking table 56, a negative electrode storage section 30 for storing negative electrodes 10, a positive electrode storage section 40 for storing positive electrodes 20, a transfer device 50, a negative electrode removal device 60, and a positive electrode removal device 65. On the upper surface of the stacking table 56, the negative electrodes 10 stored in the negative electrode storage section 30 and the positive electrodes 20 stored in the positive electrode storage section 40 are alternately transferred and stacked one by one.

<Negative electrode 10>
The negative electrode 10 includes a sheet-like negative electrode substrate 11 having a rectangular shape as a whole, and a negative electrode slurry 12 applied to both the front and back surfaces of the negative electrode substrate 11. Note that the thickness of the negative electrode 10 is exaggerated in Figures 1, 2, and 4 to 6. The negative electrode slurry 12 is a mixture of a negative electrode active material, a binder, a conductive material, a dispersion thickener, etc., and is applied to a region of the negative electrode substrate 11 excluding the rear end portion. The rectangular region of the negative electrode 10 to which the negative electrode slurry 12 is applied functions as a negative electrode-side coating portion 13.

The rear end region of the negative electrode 10, where the negative electrode substrate 11 is not coated with the negative electrode slurry 12 and the negative electrode substrate 11 is exposed, is defined as the negative electrode side uncoated portion 14, which is elongated in the left-right direction. The negative electrode side uncoated portion 14 has one negative electrode side notch 15 and two negative electrode side guide holes 16. The negative electrode side notch 15 is located at only one of the left and right ends of the negative electrode side uncoated portion 14. The negative electrode side notch 15 is formed by cutting out a portion of the rear edge portion 10R and a portion of the side edge portion 10S of the outer peripheral edge of the negative electrode 10. The two negative electrode side guide holes 16 are located in the left-right center of the negative electrode side uncoated portion 14 and at the end of each of the left and right ends where the negative electrode side notch 15 is not formed. The opening area of the negative electrode side guide hole 16 is smaller than that of the negative electrode side cutout 15.

<Positive electrode 20>
The positive electrode 20 has the same overall configuration as the negative electrode 10. Note that the thickness of the positive electrode 20 is exaggerated in FIGS. 1 and 3 . The region of the positive electrode 20 where the positive electrode slurry 22 is applied to the positive electrode substrate 21 functions as a positive electrode coated portion 23. The region of the front end of the positive electrode 20 where the positive electrode substrate 21 is exposed without being coated with the positive electrode slurry 22 is defined as a narrow positive electrode uncoated portion 24 extending in the left-right direction. The positive electrode uncoated portion 24 has one positive electrode notch 25 and two positive electrode guide holes 26. The positive electrode notch 25 is located at only one of the left-right ends of the positive electrode uncoated portion 24. The positive electrode notch 25 is formed by cutting out a portion of the front edge portion 20F and a portion of the side edge portion 20S of the outer periphery of the positive electrode 20 in a rectangular shape. The two positive electrode side guide holes 26 are located in the left-right center of the positive electrode side uncoated portion 24 and at one of the left and right end portions on the side where the positive electrode side cutout portion 25 is not formed.

<Negative electrode storage section 30>
1, the negative electrode storage section 30 is disposed to the left of the stacking table 56. The negative electrode storage section 30 has a horizontal negative electrode base 31 and three (a plurality of) negative electrode guide members 32 that protrude upward from the rear end of the negative electrode base 31. The three negative electrode guide members 32 are rod-shaped with circular cross sections and are disposed at intervals in the left-right direction.

The negative electrode storage section 30 stores two types of negative electrodes 10, each with a different shape in the plan view of the negative electrode side uncoated portion 14, stacked alternately in a horizontal position. The two types of negative electrodes 10 are held in a fixed position in a plan view by fitting the negative electrode side guide holes 16 into the negative electrode guide members. As shown in Figure 2, the two types of negative electrodes 10 are made up of negative electrodes 10 of the same shape, and the combination of the two types of negative electrodes 10 is achieved by flipping one of the negative electrodes 10 around a front-to-back symmetry axis (not shown) in the center of the left-to-right direction.

When two types of negative electrodes 10 are stacked one on top of the other so that their outer edges are aligned, the positions of the negative electrode cutouts 15 are reversed between the two types of negative electrodes 10, and a portion of the lower negative electrode uncoated portion 14 is exposed in the upper negative electrode cutout 15. This exposed area of the lower negative electrode uncoated portion 14 is defined as the negative electrode exposed portion 17. The negative electrode exposed portion 17 is the area that includes the negative electrode guide hole 16. The position of the negative electrode guide hole 16 in the center in the left-right direction matches between the two types of negative electrodes 10.

<Positive electrode storage section 40>
The positive electrode storage section 40 is disposed to the right of the stacking table 56. The positive electrode storage section 40 has a horizontal positive electrode base 41 and three (a plurality of) positive electrode guide members 42 that protrude upward from the front end of the positive electrode base 41. The three positive electrode guide members 42 are rod-shaped with circular cross sections and are disposed at intervals in the left-right direction.

The positive electrode storage section 40 stores two types of positive electrodes 20, each with a different shape in the plan view of the positive electrode side uncoated section 24, stacked alternately in a horizontal position. The two types of positive electrodes 20 are held in a fixed position in a plan view by fitting the positive electrode side guide holes 26 into the positive electrode guide members 42. As shown in Figure 3, the two types of positive electrodes 20 are made up of positive electrodes 20 of the same shape, and the combination of the two types of positive electrodes 20 is achieved by flipping one of the positive electrodes 20 around a front-to-back symmetry axis (not shown) in the center of the left-to-right direction.

When two types of positive electrodes 20 are stacked one on top of the other so that their outer edges are aligned, the positions of the positive electrode cutouts 25 are reversed between the two types of positive electrodes 20, and a portion of the lower positive electrode uncoated portion 24 is exposed in the upper positive electrode cutout 25. This exposed area of the lower positive electrode uncoated portion 24 is defined as the positive electrode exposed portion 27. The positive electrode exposed portion 27 is an area that includes the positive electrode guide hole 26. The position of the positive electrode guide hole 26 in the center in the left-right direction matches between the two types of positive electrodes 20.

<Transfer device 50>
The transfer device 50 has the function of removing the uppermost transfer target negative electrodes 18 from the plurality of negative electrodes 10 stacked in the negative electrode storage section 30 one by one and transferring them to the stacking table 56. The transfer device 50 also has the function of removing the uppermost transfer target positive electrodes 28 from the plurality of positive electrodes 20 stacked in the positive electrode storage section 40 one by one and transferring them to the stacking table 56.

The transfer device 50 includes a movable member 51 that is moved by a drive mechanism (not shown), an arm 52 that extends downward from the movable member 51, and a suction cup 53 attached to the lower end of the arm 52. The movable member 51 performs a reciprocating transfer operation in the left-right direction between a position above the negative electrode storage unit 30, a position above the stacking table 56, and a position above the positive electrode storage unit 40. The transfer path of the movable member 51 includes a position above the stacking table 56. The movable member 51 performs a carry-out operation by rising and falling directly above the negative electrode storage unit 30, a supply operation by rising and falling directly above the stacking table 56, and a carry-out operation by rising and falling directly above the positive electrode storage unit 40. The suction cup 53 adheres to the upper surface of the negative electrode coating unit 13, thereby adsorbing the negative electrode 10. The suction cup 53 adheres to the upper surface of the positive electrode coating unit 23, thereby adsorbing the positive electrode 20.

<Negative electrode detachment device 60>
The negative electrode detachment device 60 is provided above the negative electrode storage section 30. When the transfer device 50 lifts multiple negative electrodes 10 at once, the negative electrode detachment device 60 is a device for leaving only the topmost negative electrode 18 to be transferred and detaching the negative electrodes 19 below it that are not to be transferred. The negative electrodes 19 that are not to be transferred are the negative electrodes 10 stacked second or lower from the top among the multiple negative electrodes 10 stacked in the negative electrode storage section 30.

The negative electrode removal device 60 is moved left and right by a drive mechanism (not shown). The negative electrode removal device 60 has a negative electrode air nozzle 61 that sprays air downward or diagonally downward. When the negative electrode removal device 60 moves left and right, the negative electrode air nozzle 61 also moves left and right with the air spray direction directed toward the negative electrode uncoated portion 14.

<Positive electrode detachment device 65>
The positive electrode detachment device 65 is provided above the positive electrode storage section 40. When the transfer device 50 lifts up multiple positive electrodes 20 at once, the positive electrode detachment device 65 is a device for leaving only the topmost transfer target positive electrode 28 and detaching the non-transfer target positive electrodes 29 below it. The non-transfer target positive electrodes 29 are the positive electrodes 20 stacked second or lower from the top among the multiple positive electrodes 20 stacked in the positive electrode storage section 40.

The positive electrode removal device 65 is moved left and right by a drive mechanism (not shown). The positive electrode removal device 65 has a positive electrode air nozzle 66 that sprays air downward or diagonally downward. When the positive electrode removal device 65 moves left and right, the positive electrode air nozzle 66 also moves left and right with the air spray direction directed toward the positive electrode uncoated portion 24.

<Export process>
Next, the process of transferring the negative electrode 10 and the positive electrode 20 to the stacking table 56 will be described. First, the suction cups 53 of the transfer device 50 move directly above the negative electrode storage section 30 and descend to adsorb the upper surface of the transfer target negative electrode 18. When the suction cups 53 rise while adsorbing the transfer target negative electrode 18, the transfer target negative electrode 18 is lifted. At this time, if the non-transfer target negative electrode 19 is in close contact with the lower surface of the transfer target negative electrode 18 due to static electricity or the like, the non-transfer target negative electrode 19 will also be lifted along with the transfer target negative electrode 18. In this case, air is sprayed from the negative electrode air nozzle 61 of the negative electrode detachment device 60 toward the upper surface of the negative electrode-side exposed portion 17 of the non-transfer target negative electrode 19. The pressure of the air spray causes the non-transfer target negative electrode 19 to separate from the transfer target negative electrode 18 and fall.

The falling non-transfer target negative electrode 19 does not shift position or change direction in plan view because the two negative electrode guide holes 16 are fitted into the two negative electrode guide members 32. As a result, the non-transfer target negative electrode 19 that has detached from the transfer target negative electrode 18 falls while maintaining a constant position and orientation, returning to its original position (stacked position) within the negative electrode storage section 30.

After the non-transfer target negative electrode 19 has been detached, the transfer target negative electrode 18 is carried to the upper surface of the stacking table 56 by the transfer device 50 and placed on top of it. When detaching the non-transfer target negative electrode 19, the air sprayed from the negative electrode detachment device 60 is directed only toward the negative electrode side exposed portion 17 of the non-transfer target negative electrode 19, and not toward the negative electrode side uncoated portion 14 of the transfer target negative electrode 18. Therefore, there is no risk of the transfer target negative electrode 18 shifting forward/backward or left/right relative to the suction cup 53 due to the air spray pressure, and the placement position of the transfer target negative electrode 18 on the stacking table 56 remains constant.

After placing the negative electrode 10 on the stacking table 56, a separator 55 is placed on top of the placed negative electrode 10. During this time, the suction cup 53 of the transfer device 50 moves directly above the positive electrode storage section 40 and descends, adsorbing the upper surface of the target positive electrode 28. When the suction cup 53 rises while adsorbing the target positive electrode 28, the target positive electrode 28 is lifted. If the non-target positive electrode 29 is also lifted up together with the target positive electrode 28, air is sprayed from the positive electrode air nozzle 66 of the positive electrode detachment device 65 toward the upper surface of the exposed positive electrode portion 27 of the non-target positive electrode 29, just as in the case of the negative electrode 10. The pressure of the air spray causes the non-target positive electrode 29 to separate from the target positive electrode 28 and fall.

The falling non-transfer target positive electrode 29 does not shift position or change direction in plan view because the two positive electrode guide holes 26 are fitted into the two positive electrode guide members 42. As a result, the non-transfer target positive electrode 29 that has detached from the transfer target positive electrode 28 falls while maintaining a constant position and orientation, returning to its original position (stacked position) within the positive electrode storage section 40.

After the non-transfer target positive electrode 29 is detached, the transfer target positive electrode 28 is carried to the upper surface of the stacking table 56 by the transfer device 50 and placed on the top surface of the separator 55. When detaching the non-transfer target positive electrode 29, the air ejected from the positive electrode ejection device 65 is directed only toward the positive electrode side exposed portion 27 of the non-transfer target positive electrode 29, and not toward the positive electrode side uncoated portion 24 of the transfer target negative electrode 18. Therefore, there is no risk of the transfer target positive electrode 28 shifting forward/backward or left/right relative to the suction cup 53 due to the air ejection pressure, and the placement position of the transfer target positive electrode 28 on the stacking table 56 remains constant. In other words, in a plan view, the transfer target positive electrode 28 is placed in the correct positional relationship with the negative electrode 10 placed on the stacking table 56.

After the positive electrode 20 is placed on the stacking table 56, a separator 55 is placed on top of the placed positive electrode 20. The above-mentioned negative electrode 10 transfer process and the above-mentioned positive electrode 20 transfer process are then repeated to form a stacked electrode body on the stacking table 56.

When the negative electrodes 10 are removed from the negative electrode storage section 30, the non-transfer target negative electrodes 19 that have detached and fallen from the transfer target negative electrodes 18 are transferred to the stacking table 56 as transfer target negative electrodes 18 in the next removal process. As described above, the non-transfer target negative electrodes 19 that have detached and fallen from the transfer target negative electrodes 18 are returned to their predetermined positions (the positions where they were originally stacked) in the plan view of the negative electrode storage section 30 by the negative electrode guide members 32. Therefore, the non-transfer target negative electrodes 19 that have returned to the negative electrode storage section 30 are attracted to the suction cups 53 while maintaining the appropriate positional relationship with respect to the suction cups 53.

When the positive electrode 20 is removed from the positive electrode storage section 40, the non-transfer target positive electrode 29 that has detached from the transfer target positive electrode 28 and fallen is transferred to the stacking table 56 as the transfer target positive electrode 28 in the next removal process. Like the negative electrode 10, the non-transfer target positive electrode 29 that has detached from the transfer target positive electrode 28 and fallen is returned to a predetermined position in the positive electrode storage section 40 in a planar view by the positive electrode guide member 42. Therefore, the non-transfer target positive electrode 29 that has returned to the positive electrode storage section 40 is attracted to the suction cup 53 while maintaining the appropriate positional relationship with respect to the suction cup 53.

<Actions and Effects of First Embodiment>
The electrode carry-out device of the first embodiment has a negative electrode storage unit 30, a positive electrode storage unit 40, a transfer device 50, a negative electrode detachment device 60, and a positive electrode detachment device 65. The negative electrode storage unit 30 stores a plurality of sheet-shaped negative electrodes 10 stacked in a horizontal position. The plurality of negative electrodes 10 stacked in the negative electrode storage unit 30 consist of two types of negative electrodes 10 with different shapes in a plan view. In the negative electrode storage unit 30, the two types of negative electrodes 10 are stacked alternately. The negative electrode 10 has a negative electrode substrate 11, a negative electrode-side coated portion 13 in which the negative electrode substrate 11 is coated with a negative electrode slurry 12, and a negative electrode-side uncoated portion 14 in which the negative electrode substrate 11 is exposed without being coated with the negative electrode slurry 12.

The positive electrode storage section 40 stores multiple sheet-like positive electrodes 20 stacked horizontally. The multiple positive electrodes 20 stacked in the positive electrode storage section 40 consist of two types of positive electrodes 20 with different shapes in a plan view. In the positive electrode storage section 40, the two types of positive electrodes 20 are stacked alternately. The positive electrode 20 has a positive electrode substrate 21, a positive electrode-side coated section 23 in which the positive electrode substrate 21 is coated with the negative electrode slurry 12, and a positive electrode-side uncoated section 24 in which the positive electrode substrate 21 is not coated with the positive electrode slurry 22 and the positive electrode substrate 21 is exposed.

The transfer device 50 holds, in an adsorbed state, the uppermost negative electrode 18 to be transferred among the multiple negative electrodes 10 stacked in the negative electrode storage section 30, and transfers it to the stacking table 56 for stacking the negative electrode 10, positive electrode 20, and separator 55. The transfer device 50 also holds, in an adsorbed state, the uppermost positive electrode 28 to be transferred among the multiple positive electrodes 20 stacked in the positive electrode storage section 40, and transfers it to the stacking table 56.

When a non-transfer target negative electrode 19, which is not a transfer target, comes into close contact with the underside of a transfer target negative electrode 18 held by suction by the transfer device 50, the negative electrode detachment device 60 detaches the non-transfer target negative electrode 19 from the transfer target negative electrode 18 using air injection pressure, causing the electrode to fall into the negative electrode storage section 30. The negative electrode detachment device 60 detaches the non-transfer target negative electrode 19 from the transfer target negative electrode 18 using air injection pressure. The negative electrode side uncoated portion 14 of the negative electrode 10 functions as the target area for the air injected from the negative electrode detachment device 60. This prevents the negative electrode side coated portion 13 of the negative electrode 10 from being deformed by the air injection pressure.

When a non-transfer target positive electrode 29, which is not a transfer target, comes into close contact with the underside of a transfer target positive electrode 28 that is adsorbed and held by the transfer device 50, the positive electrode detachment device 65 detaches the non-transfer target positive electrode 29 from the transfer target positive electrode 28 using air injection pressure, causing the electrode to fall into the positive electrode storage section 40. The positive electrode detachment device 65 detaches the non-transfer target positive electrode 29 from the transfer target positive electrode 28 using air injection pressure. The positive electrode uncoated portion 24 of the positive electrode 20 functions as the target area for the air injected from the positive electrode detachment device 65. This prevents the positive electrode coated portion 23 of the positive electrode 20 from being deformed by the air injection pressure.

The negative electrode storage unit 30 is equipped with multiple negative electrode guide members 32 that guide the non-transfer target negative electrode 19 that has detached from the transfer target negative electrode 18 so that it falls to a predetermined position in the negative electrode storage unit 30 while maintaining a constant position in a plan view. The negative electrode guide members 32 allow the falling non-transfer target negative electrode 19 to be returned to a predetermined position in the negative electrode storage unit 30 without being damaged.

The negative electrode guide member 32 is positioned so that it slides against the negative electrode uncoated portion 14. Even if the negative electrode uncoated portion 14 is damaged, it does not affect the power generation or electromotive functions, so the negative electrode guide member 32 does not impair the performance of the negative electrode 10.

Multiple negative electrode guide holes 16 are formed in the negative electrode uncoated portion 14. Multiple negative electrode guide members 32 are individually inserted into the multiple negative electrode guide holes 16. With this configuration, there is no risk of the negative electrode 10 coming off the negative electrode guide members 32. The negative electrode 10 can be reliably positioned relative to the negative electrode storage portion 30 in a plan view.

The positive electrode storage section 40 is equipped with multiple positive electrode guide members 42 that guide the non-transfer target positive electrode 29 that has detached from the transfer target positive electrode 28 so that it falls to a predetermined position in the positive electrode storage section 40 while maintaining a constant position in a plan view. The positive electrode guide members 42 allow the falling non-transfer target positive electrode 29 to be returned to a predetermined position in the positive electrode storage section 40 without being damaged.

The positive electrode guide member 42 is positioned so that it slides against the positive electrode uncoated portion 24. Even if the positive electrode uncoated portion 24 is damaged, it does not affect the power generation or electromotive functions, so the positive electrode guide member 42 does not impair the performance of the positive electrode 20.

Multiple positive electrode guide holes 26 are formed in the positive electrode uncoated portion 24. Multiple positive electrode guide members 42 are individually inserted into the multiple positive electrode guide holes 26. With this configuration, there is no risk of the positive electrode 20 becoming detached from the positive electrode guide members 42. The positive electrode 20 can be reliably positioned relative to the positive electrode storage portion 40 in a plan view.

The two types of negative electrodes 10 have negative electrode-side exposed portions 17 that are exposed in a planar view and are not hidden by the upper negative electrode 10 when the two types of negative electrodes 10 are overlapped. When the non-transfer target negative electrode 19 is in close contact with the underside of the transfer target negative electrode 18, the negative electrode detachment device 60 injects air only toward the negative electrode-side exposed portion 17 of the non-transfer target negative electrode 19. With this configuration, the air injection pressure does not act on the transfer target negative electrode 18 adsorbed to the transfer device 50. Therefore, when air is injected to detach the non-transfer target negative electrode 19 from the transfer target negative electrode 18, the transfer target negative electrode 18 can be prevented from shifting position relative to the transfer device 50.

The two types of positive electrodes 20 each have a positive electrode-side exposed portion 27 that is exposed in a plan view and not hidden by the upper positive electrode 20 when the two types of positive electrodes 20 are overlapped. When the non-transfer target positive electrode 29 is in close contact with the underside of the transfer target positive electrode 28, the positive electrode detachment device 65 injects air only toward the positive electrode-side exposed portion 27 of the non-transfer target positive electrode 29. With this configuration, the air injection pressure does not act on the transfer target positive electrode 28 adsorbed to the transfer device 50. Therefore, when air is injected to detach the non-transfer target positive electrode 29 from the transfer target positive electrode 28, the transfer target positive electrode 28 can be prevented from shifting position relative to the transfer device 50.

The negative electrode side exposed portion 17 is formed only on the negative electrode side uncoated portion 14 of the negative electrode 10. Even if the negative electrode side uncoated portion 14 is damaged, it does not affect the power generation or electromotive functions, so even if air jet pressure acts on the negative electrode side uncoated portion 14, it does not impair the performance of the negative electrode 10. The positive electrode side exposed portion 27 is formed only on the positive electrode side uncoated portion 24 of the positive electrode 20. Even if the positive electrode side uncoated portion 24 is damaged, it does not affect the power generation or electromotive functions, so even if air jet pressure acts on the positive electrode side uncoated portion 24, it does not impair the performance of the positive electrode 20.

When one of the two types of negative electrodes 10 stacked in the negative electrode storage section 30 is inverted upside down, the planar shape of the negative electrode side uncoated portion 14 of both negative electrodes 10 is the same. Therefore, only one type of negative electrode 10 needs to be prepared. When one of the two types of positive electrodes 20 stacked in the positive electrode storage section 40 is inverted upside down, the planar shape of the positive electrode side uncoated portion 24 of both positive electrodes 20 is the same. Therefore, only one type of positive electrode 20 needs to be prepared.

The negative electrode side uncoated portion 14 has a negative electrode side cutout 15 that exposes the negative electrode side exposed portion 17 of the negative electrode side uncoated portion 14 of the lower negative electrode 10 when two types of negative electrodes 10 are overlapped. This configuration eliminates the need for the negative electrode side exposed portion 17 to partially protrude from the outer periphery of the negative electrode side uncoated portion 14, preventing deformation of the negative electrode side exposed portion 17 due to interference from foreign matter. The negative electrode side cutout 15 is shaped by partially recessing the linear edge portion (rear edge portion 10R and side edge portion 10S) of the outer periphery of the negative electrode side uncoated portion 14. This configuration makes it easier to visually confirm the position of the negative electrode side cutout 15 and the orientation of the negative electrode 10 in a plan view compared to a hole-shaped cutout with an open edge that is connected around the entire circumference.

The positive electrode side uncoated portion 24 has a positive electrode side cutout 25 that exposes the positive electrode side exposed portion 27 of the positive electrode side uncoated portion 24 of the lower positive electrode 20 when two types of positive electrodes 20 are overlapped. This configuration eliminates the need for the positive electrode side exposed portion 27 to partially protrude from the outer periphery of the positive electrode side uncoated portion 24, preventing deformation of the positive electrode side exposed portion 27 due to interference from foreign matter. The positive electrode side cutout 25 is shaped by recessing a portion of the linear edge (front edge 20F and side edge 20S) of the outer periphery of the positive electrode side uncoated portion 24. This configuration makes it easier to visually confirm the position of the positive electrode side cutout 25 and the orientation of the positive electrode 20 in a plan view compared to a hole-shaped cutout with an open edge that is connected around the entire circumference.

<Other Examples>
The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments are also included within the technical scope of the present invention.
The exposed portion to which the air jet pressure of the transfer device acts may be set in the coating portion.
The two types of electrodes may be combined such that the uncoated portions have the same shape in plan view, but the coated portions have different shapes in plan view.
The two types of electrodes may be combined in such a way that the planar shapes of the uncoated portions of both electrodes are different even when one electrode is inverted upside down (a combination in which the planar shapes of the uncoated portions are asymmetrical).
The exposed portion may be in a shape that partially protrudes from the outer periphery of the uncoated portion.
The cutout portion may be a hole-like portion whose opening edge is continuous around the entire periphery.

10...Negative electrode (electrode)
10R...rear edge of negative electrode (straight edge)
10S: Side edge of negative electrode (straight edge)
11... Base material for negative electrode (base material)
12...Slurry for negative electrode (slurry)
13... Negative electrode side coating part (coating part)
14...Negative electrode side uncoated portion (uncoated portion)
15...Negative electrode side notch (notch)
16...Negative electrode side guide hole (guide hole)
17...Negative electrode side exposed part (exposed part)
18...Transfer target negative electrode (transfer target electrode)
19...Transfer non-target negative electrode (transfer non-target electrode)
20...Positive electrode (electrode)
20F...Front edge of positive electrode (straight edge)
20S: Side edge of positive electrode (straight edge)
21...Base material for positive electrode (base material)
22...Positive electrode slurry (slurry)
23...Positive electrode side coating part (coating part)
24: Positive electrode side uncoated part (uncoated part)
25...Positive electrode side notch (notch)
26...Positive electrode side guide hole (guide hole)
27...Positive electrode side exposed portion (exposed portion)
28...Transfer target positive electrode (transfer target electrode)
29...Transfer non-target positive electrode (transfer non-target electrode)
30...Negative electrode storage section (electrode storage section)
32...Negative electrode guide member (guide member)
40...Positive electrode reservoir (electrode reservoir)
42...Positive electrode guide member (guide member)
50: Transfer device 55: Separator 56: Stacking table 60: Negative electrode detachment device (detachment device)
65... Positive electrode detachment device (detachment device)

Claims (7)

an electrode storage section in which two types of sheet-shaped electrodes having different shapes in plan view are alternately stacked in a horizontal position and stored;
a transfer device that holds, by suction, an uppermost electrode to be transferred among the plurality of electrodes stacked in the electrode storage section, and transfers the electrode to a stacking table for stacking the electrode and a separator;
a detachment device that detaches a non-transfer target electrode from the transfer target electrode by an air jet pressure when the non-transfer target electrode comes into close contact with the lower surface of the transfer target electrode attracted by the transfer device,
the two types of electrodes have exposed portions that are not hidden by the upper electrode when the two types of electrodes are overlapped, and are exposed in a plan view,
The electrode carrying-out device is configured to eject air only toward the exposed portion of the non-transfer target electrode when the non-transfer target electrode comes into close contact with the lower surface of the transfer target electrode. the electrode has a substrate, a coated portion in which a slurry is applied to the substrate, and an uncoated portion in which the slurry is not applied and the substrate is exposed;
The electrode carrying-out device according to claim 1 , wherein the exposed portion is formed only in the uncoated portion. The electrode discharge device described in claim 2, wherein when one of the two types of electrodes stacked in the electrode storage section is inverted upside down, the uncoated portions of both electrodes have the same shape in plan view. An electrode conveying device as described in claim 2 or claim 3, wherein the uncoated portion has a notch formed therein that exposes the exposed portion of the uncoated portion of the lower electrode when the two types of electrodes are overlapped. The electrode transport device described in claim 4, wherein the cutout portion is a recess in a linear portion of the outer periphery of the uncoated portion. An electrode transport device according to any one of claims 1 to 5, wherein the electrode storage section is provided with a guide member that guides the asymmetric electrode that has fallen off the target electrode to a predetermined position in the electrode storage section. The electrode transport device described in claim 6, wherein the guide member is inserted into a guide hole formed in the uncoated portion of the electrode not to be transported.