JP2018092723A - Transport device for electrode assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transport device for an electrode assembly, capable of inhibiting foreign matter from being adhered to the electrode assembly when positioning a transport jig to a transfer table.SOLUTION: A transport device 69 for an electrode assembly includes: a transport jig 70; a transfer table 80 for transferring the electrode assembly in a state where an arm 72 of the transport jig 70 is supported on the upper surface 80a; and a positioning protrusion 82 having a shape protruding from the upper surface 80a of the transfer table 80. Moreover, the transport device 69 includes: a positioning recess 73 which exists at the protrusion end 78 from the side surface 14d of the electrode assembly 14 in the arm 72 and into which the positioning protrusion 82 is inserted from below; and an air injector 85 capable of blowing air down toward an inserting position of the positioning protrusion 82 to the positioning recess 73.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a transfer jig on which an electrode assembly is placed, a transfer table for transferring the transfer jig, a positioning projection protruding from the upper surface of the transfer table, and a positioning in which the positioning projection is inserted from below And a recessed portion.

  A vehicle such as an EV (Electric Vehicle) or a PHV (Plug in Hybrid Vehicle) is equipped with a secondary battery such as a lithium ion battery as a power storage device that stores power supplied to an electric motor serving as a prime mover. The secondary battery includes, for example, an electrode assembly in which a rectangular positive electrode having an active material layer formed on both sides and a negative electrode are stacked with a separator interposed therebetween.

  When manufacturing an electrode assembly in a secondary battery, first, a positive electrode, a separator, and a negative electrode are stacked, and those electrode assemblies are manufactured. Thereafter, the electrode assembly is restrained by a restraining jig so as to be sandwiched from both sides in the stacking direction. As a restraining jig, for example, a pair of restraining plates is used to prevent a gap between the pair of metal restraining plates sandwiching the electrode assembly from both the stacking direction and the pair of restraining plates sandwiching the electrode assembly. And a bolt that is screwed into a female screw hole provided in one of the plates.

  The electrode assembly restrained by the restraining jig is further placed on the transport jig, and the transport jig is placed on the transfer table of the manufacturing apparatus, for example, the thickness adjusting apparatus. And a transfer stand moves, an electrode assembly is conveyed toward a manufacturing apparatus, and is provided to this manufacturing apparatus. In order to restrict the transfer jig from moving from the transfer table during transfer of the electrode assembly, the transfer jig is positioned on the transfer table.

  As a method for positioning the transfer jig on the transfer table, a general positioning mechanism is employed. For example, a positioning convex portion is provided on the upper surface of the transfer table, and a positioning concave portion is provided on the transport jig. And a conveyance jig is positioned with respect to a transfer stand by insertion of the positioning convex part to a positioning recessed part.

  By the way, when the positioning convex portion is inserted into the positioning concave portion, there is a possibility that foreign matter may be generated due to interference between the positioning convex portion and the inner peripheral surface of the positioning concave portion. Therefore, in the positioning mechanism, it has been proposed to blow off the generated foreign matter by air blow from the air injection device. For example, in patent document 1, the clamp mechanism as a positioning mechanism is provided in a base board, and the air injection apparatus is provided in the clamp mechanism. In Patent Document 1, a workpiece fixing pallet positioned on a base plate is provided with a positioning recess.

  When positioning the workpiece fixing pallet on the base plate, the piston rod (positioning convex portion) of the clamp mechanism is inserted into the positioning concave portion of the workpiece fixing pallet. At this time, pressurized air is supplied from the clamp mechanism into the positioning recess. As a result, even if foreign matter is generated due to interference between the piston rod and the positioning recess, the foreign matter is blown away from the positioning recess by air blow.

JP 2002-307255 A

  However, when a positioning mechanism having an air injection device such as Patent Document 1 is used and the transfer jig on which the electrode assembly is placed is positioned on the transfer table, when air is blown from the air injection device into the positioning recess, There is a possibility that foreign matter is blown up and the foreign matter adheres to the electrode assembly placed on the conveying jig.

  An object of the present invention is to provide an electrode assembly transfer device that can suppress foreign matter from adhering to the electrode assembly when positioning a transfer jig on a transfer table.

  An electrode assembly transfer apparatus for solving the above problems includes a main body portion on which an electrode assembly having a plurality of sheet-like electrodes is placed, and an arm having a shape protruding laterally from the main body portion. A transfer table that transfers the transfer jig while the arm is supported on the upper surface, a positioning convex portion that protrudes from the upper surface of the transfer table, and the arm, more than the side surface of the electrode assembly. A positioning recess that is present at a projecting end projecting sideward and into which the positioning projection is inserted from below, and an air injection device capable of blowing down air toward the insertion location of the positioning projection with respect to the positioning recess; The gist is to provide.

  According to this, the positioning concave portion of the transport jig is not the main body portion on which the electrode assembly is placed, but the protruding end portion of the arm that is further away from the electrode assembly. For this reason, even if the inner peripheral surface of the positioning concave portion interferes with the positioning convex portion and a foreign matter is generated, the foreign matter is generated at a position away from the electrode assembly and hardly adheres to the electrode assembly. Even if foreign matter is generated at the position where the positioning convex portion is inserted with respect to the positioning concave portion, the foreign matter generated at the insertion location is blown down below the electrode assembly by the air blown down from the air injection device. Therefore, when positioning a conveyance jig to a transfer stand, it can control that a foreign substance adheres to an electrode assembly.

In the electrode assembly transfer device, the transfer jig preferably includes a covering portion that covers the positioning recess from above on the protruding end.
According to this, even if the inner peripheral surface of the positioning concave portion interferes with the positioning convex portion and a foreign matter is generated, the covering portion can suppress the foreign matter from being scattered above the positioning concave portion. It becomes difficult to adhere to a solid.

  In the electrode assembly transfer apparatus, the positioning convex portion has a tapered shape as it protrudes from the upper surface of the transfer table, and the positioning concave portion gradually narrows the opening width as it is recessed from the lower surface of the protruding end portion. The shape is preferred.

  According to this, when the positioning convex portion is inserted into the positioning concave portion, the outer peripheral surface of the positioning convex portion tends to follow the inner peripheral surface of the positioning concave portion, and the positioning convex portion and the inner peripheral surface of the positioning concave portion are less likely to interfere with each other. This makes it easier to suppress the generation of foreign matter.

In the electrode assembly transport apparatus, the positioning convex portion preferably includes a solid lubricating layer on the outer peripheral surface.
According to this, compared with the case where there is no fixed lubrication layer, the slidability in the outer peripheral surface of a positioning convex part is improved. For this reason, when the positioning convex portion is inserted into the positioning concave portion, the inner peripheral surface of the positioning concave portion easily slides along the outer peripheral surface of the positioning convex portion, and the generation of foreign matters is easily suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, when positioning a conveyance jig to a transfer stand, it can suppress that a foreign material adheres to an electrode assembly.

The disassembled perspective view which shows the secondary battery of embodiment. The perspective view which shows the external appearance of the secondary battery of embodiment. The disassembled perspective view which shows the component of an electrode assembly. The exploded perspective view of an electrode assembly and a restraining jig. The perspective view which shows the state which restrained the electrode assembly with the restraining jig. The disassembled perspective view which shows a conveyance jig. The partial perspective view which shows a positioning recessed part and a positioning convex part. The perspective view which shows a conveyance jig and a transfer stand. (A) is a side view which shows the state before inserting a positioning convex part in a positioning recessed part, (b) is a side view which shows the state which inserted the positioning convex part in the positioning recessed part. The side view which shows the state by which the conveyance jig was positioned by the transfer stand. The front view which shows the state by which the conveyance jig was positioned by the transfer stand. The top view which shows the state by which the conveyance jig was positioned by the transfer stand.

Hereinafter, an embodiment in which an electrode assembly transport apparatus is embodied will be described with reference to FIGS.
As shown in FIG. 1 or FIG. 2, the secondary battery 10 is a lithium ion secondary battery. The secondary battery 10 includes a metal case 11. The case 11 includes a bottomed rectangular parallelepiped container 12 having an opening 12 a on one surface, and a lid 13 that closes the opening 12 a of the container 12. The container 12 has a rectangular bottom plate 12b, a short side wall 12c erected from a pair of opposed short side edges of the bottom plate 12b, and a long side wall 12d erected from a pair of opposed long side edges of the bottom plate 12b. Is provided. The case 11 contains an electrode assembly 14 and an electrolytic solution (not shown). The electrode assembly 14 has a rectangular parallelepiped shape as a whole, corresponding to the internal space of the container 12 having a rectangular parallelepiped shape.

  As shown in FIG. 3, the electrode assembly 14 is formed by laminating a positive electrode 15 as a rectangular sheet-like electrode and a negative electrode 19 as a rectangular sheet-like electrode with a separator 23 interposed therebetween. It is constituted by. The separator 23 is made of a resin and is made of a porous film through which lithium ions related to electrical conduction can pass. The positive electrode 15 includes a rectangular positive electrode metal foil (for example, aluminum foil) 16 and a positive electrode active material layer 17 present on both surfaces of the positive electrode metal foil 16. The positive electrode 15 includes a positive electrode current collecting tab 18 on a part of one side.

  The negative electrode 19 includes a rectangular negative electrode metal foil (for example, copper foil) 20 and negative electrode active material layers 21 present on both surfaces of the negative electrode metal foil 20. The negative electrode 19 includes a negative electrode current collecting tab 22 on a part of one side.

  As shown in FIG. 1, in the electrode assembly 14, the direction in which the positive electrode 15, the negative electrode 19, and the separator 23 are stacked is a stacking direction. The electrode assembly 14 includes stacked end faces 14a at both ends in the stacking direction. The electrode assembly 14 includes a tab-side end surface 14b on an end surface where the positive electrode current collecting tab 18 and the negative electrode current collecting tab 22 are present, and has an end surface parallel to the tab side end surface 14b. A bottom surface 14c is provided. The electrode assembly 14 includes side surfaces 14d on two end surfaces other than the tab-side end surface 14b and the bottom surface 14c.

  The positive electrode 15, the negative electrode 19, and the separator 23 are arranged in a line along the electrode stacking direction in which the positive electrode current collecting tabs 18 are arranged, and the negative electrode current collecting tabs 22 are not overlapped with the positive electrode current collecting tabs 18. Are stacked so as to be arranged in a row along the stacking direction of the electrodes. Each of the positive electrode current collecting tabs 18 and each of the negative electrode current collecting tabs 22 are bent in a collected (bundled) state. Each positive current collecting tab 18 is electrically connected by welding the portions where the positive current collecting tabs 18 are overlapped, and the positive electrode conductive member 24 is connected to the positive current collecting tab 18. A positive electrode terminal 25 for taking out electricity from the electrode assembly 14 is connected to the positive electrode conductive member 24.

  Similarly, the negative electrode current collecting tabs 22 are electrically connected by welding the portions where the negative electrode current collecting tabs 22 are overlapped, and the negative electrode conductive member 26 is connected to the negative electrode current collecting tabs 22. A negative electrode terminal 27 for taking out electricity from the electrode assembly 14 is connected to the negative electrode conductive member 26. The positive terminal 25 and the negative terminal 27 pass through the lid 13 and protrude out of the case 11, and the positive terminal 25 and the negative terminal 27 are insulated from the lid 13 by an insulating ring 28.

  The electrode assembly 14 is integrated by the first to third tapes 97a to 97c. The first tape 97a is stuck from the tab side end face 14b to both the laminated end faces 14a, and the second tape 97b is stuck from each side face 14d to both the laminated end faces 14a. The third tape 97c is stuck from the bottom surface 14c to both the laminated end surfaces 14a. The first to third tapes 97a to 97c maintain a constant thickness, which is a dimension along the electrode stacking direction in the electrode assembly 14.

  The thickness of the electrode assembly 14 is adjusted so that its thickness is slightly smaller than the inner dimension of the case 11. The thickness of the electrode assembly 14 is important in favor of the work of inserting the electrode assembly 14 into the case 11. However, there is a variation in the thickness of the electrode assembly 14 in which a large number of positive electrodes 15, negative electrodes 19, and separators 23 are laminated, and the difference between the thickness of the electrode assembly 14 and the internal dimensions of the case 11 increases. A gap is generated, and the electrode assembly 14 is rattled in the case 11. Accordingly, when the difference between the thickness and the internal dimension becomes large, as shown in FIG. 1, the spacer 96 made of a resin sheet is inserted by an appropriate number of one to a plurality. However, the thickness adjusted by the spacer 96 is a small value, for example, 1 mm or less, and in order to set the number of spacers 96 to be inserted (thickness), it is necessary to measure the precise thickness of the electrode assembly 14 in advance. There is. Although not shown, after the number of spacers 96 to be inserted is set, the spacers 96 and the electrode assembly 14 are integrated with a tape, and the thickness of the electrode assembly 14 is maintained at the adjusted thickness with the tape. The

Next, the restraining jig 40 of the electrode assembly 14 will be described.
As shown in FIG. 4 or FIG. 5, the restraining jig 40 includes a pair of restraining plates 50 and 60 made of a metal plate, a bolt 41 and a female screw portion 52.

  The restraint plates 50 and 60 include substantially rectangular main body portions 50a and 60a. One constraining plate 50 includes a pair of protruding portions 51 each having a shape protruding sideways from the side surfaces on both short sides of the main body portion 50a. On the side surface of each short side of the main body 50a, the pair of protrusions 51 are provided at an interval in the short direction of the main body 50a. One constraining plate 50 includes a female screw portion 52 near the tip of each protruding portion 51.

  The other constraining plate 60 includes a pair of projecting portions 61 each having a shape projecting laterally from the side surfaces on both short sides of the main body 60a. On the side surface of each short side of the main body 60a, the pair of protrusions 61 are provided at an interval in the short direction of the main body 60a. The other restraining plate 60 includes an insertion hole 62 near the tip of each protrusion 61. The protruding length of the protruding portion 51 from the main body portion 50a is the same as the protruding length of the protruding portion 61 from the main body portion 60a.

  The bolt 41 is made of resin. The bolt 41 is inserted into the insertion hole 62 of each protrusion 61 in a state where the electrode assembly 14 is sandwiched between the one restriction plate 50 and the other restriction plate 60, and the female screw portion of each protrusion 51. 52. By screwing the bolt 41 into the female thread portion 52, the pair of restraining plates 50, 60 are held in a state where the electrode assembly 14 is restrained by the pair of restraining plates 50, 60.

Next, the electrode assembly transfer apparatus will be described.
The electrode assembly transport device is a device for moving the electrode assembly 14 in and out of the thickness adjusting device that adjusts the thickness of the electrode assembly 14.

  As shown in FIG. 8 or FIG. 10, the transport device 69 includes a transport jig 70 on which the electrode assembly 14 restrained by the restraining jig 40 is placed, a transfer table 80 that transports the transport jig 70, and air injection. An apparatus 85.

  As shown in FIG. 6, the conveyance jig 70 includes a jig main body 71 made of a metal plate and an interposed member 76 made of a ceramic plate integrated with the jig main body 71. In the present embodiment, the jig main body 71 is made of iron-chromium alloy stainless steel (SUS430). The jig main body 71 includes a substantially rectangular main body 71a. The main body portion 71a of the jig main body 71 has the same size as the main body portions 50a and 60a of the restraining plates 50 and 60. The jig main body 71 includes an arm 72 having a shape protruding sideways from the side surfaces on both short sides that are opposite to the main body portion 71a. There are a pair of arms 72 on each side of the short side of the main body 71a. On the side surface of each short side of the main body 71a, the pair of arms 72 are provided with a gap in the short direction of the main body 71a.

  As shown in FIG. 7 or FIG. 9A, the jig main body 71 includes a positioning recess 73 at the distal end portion of each arm 72 in the longitudinal direction. The positioning recess 73 has a shape that is recessed upward from the lower surface 72 a of the arm 72. Further, the positioning recess 73 has a shape including an opening 73 a on the front end surface in the longitudinal direction of each arm 72, that is, on the protruding end surface of each arm 72. When the protruding end surface of each arm 72 is viewed from the front, the positioning recess 73 has a tapered shape that gradually narrows the opening width from the lower surface 72a of the arm 72 upward.

  The positioning recess 73 exists within a thickness that is a dimension along the vertical direction of the jig body 71. A portion of the arm 72 that is above the positioning recess 73 covers the positioning recess 73 from above. Therefore, the arm 72 includes a covering portion 79 that covers the positioning recess 73 from above.

  As shown in FIG. 6, the intervention member 76 is integrated with the jig body 71 in order to restrict the jig body 71 and the electrode assembly 14 from contacting each other. The intervention member 76 includes a substantially rectangular main body 76a. The main body portion 76 a of the intervention member 76 is the same size as the main body portion 71 a of the jig main body 71. The stacked end surface 14a of the electrode assembly 14 is placed on the main body 76a. The electrode assembly 14 is supported by the jig main body 71 via the interposed member 76. Therefore, the interposition member 76 restricts the stacked end surface 14 a of the electrode assembly 14 from contacting the jig body 71.

  The intervening member 76 includes a pair of arms 77 each having a shape protruding from the side surfaces on both short sides of the main body 76a. On the side surface of each short side of the main body portion 76a, the pair of arms 77 are provided at an interval in the short direction of the main body portion 76a. Regarding the arm 77 of the intervention member 76, the protruding length from the main body portion 76 a is shorter than the protruding length from the main body portion 71 a of the arm 72 of the jig main body 71.

  The conveying jig 70 is configured by fixing an interposed member 76 to the upper surface of the jig main body 71. In the conveying jig 70, the arm 77 of the interposition member 76 is placed on each arm 72 of the jig main body 71. The distal end portion of the arm 72 protrudes beyond the distal end portion of the arm 77 of the intervention member 76. In a state where the electrode assembly 14 is placed on the jig main body 71 via the interposed member 76, the distal end side of the arm 72 protrudes from the side surface 14 d of the electrode assembly 14. Each arm 72 includes a protruding end portion 78 at a portion protruding from the side surface 14 d of the electrode assembly 14. The jig body 71 includes a positioning recess 73 and a covering portion 79 at the protruding end portion 78.

Next, the transfer stand 80 that supports and transfers the transfer jig 70 will be described.
As shown in FIG. 8, the transfer table 80 moves the transport jig 70 in and out of the thickness adjusting device while supporting the transport jig 70 from below at two locations. The transfer table 80 is movably supported by a driving device (not shown). The transfer table 80 includes two positioning protrusions 82 on a rectangular upper surface 80a. In the present embodiment, the positioning projection 82 is made of iron-chromium-nickel alloy stainless steel (SUS304).

  On the upper surface 80a of each transfer table 80, the two positioning projections 82 are arranged at an interval in the longitudinal direction of the upper surface 80a. The two positioning projections 82 on each upper surface 80 a correspond to the pair of arms 72 of the jig main body 71 and can be inserted into the positioning recesses 73 of each arm 72.

  When the inner peripheral surface of the positioning concave portion 73 facing the short direction of the arm 72 is in contact with the positioning convex portion 82, the transfer jig 70 is moved in the front-rear direction along the short direction of the main body portion 71a. Be regulated. Moreover, the conveyance jig | tool 70 is the left-right direction in alignment with the longitudinal direction of the main-body part 71a, when the inner peripheral surface of the positioning recessed part 73 located in the back from the opening part 73a of the positioning recessed part 73 contacts with each positioning convex part 82. Movement to is regulated. Accordingly, the contact of the inner peripheral surface of the positioning recess 73 with respect to the positioning protrusion 82 restricts the movement of the conveying jig 70 in two directions, front, rear, left and right.

  As shown in FIG. 7 or FIG. 9B, each positioning convex portion 82 has a tapered shape that tapers along the protruding direction from the upper surface 80 a of the transfer table 80, and is made of metal. The taper shape of each positioning convex portion 82 has the same inclination angle along the inner peripheral surface of the positioning concave portion 73 in a state where the positioning convex portion 82 is inserted into the positioning concave portion 73. Each positioning projection 82 includes a solid lubricating layer 82a on the outer peripheral surface. The solid lubricating layer 82a is made of fluorine. The slidability of each positioning projection 82 is enhanced by the solid lubricant layer 82a.

In addition, as shown in FIG. 11, the conveyance apparatus 69 is provided with the base 86 which supports the conveyance jig 70 outside the thickness adjustment apparatus. The pedestal 86 can move up and down.
As shown in FIG. 10 or FIG. 11, the transport device 69 includes four air ejection devices 85. Each air injection device 85 is disposed above the conveying jig 70 supported by the pedestal 86. Two air injection devices 85 are arranged corresponding to each short side of the main body 71a. Each air injection device 85 is arranged corresponding to each arm 72. Each air injection device 85 is disposed above the pair of arms 72 on each short side of the main body 71 a and closer to the main body 71 a than the positioning recess 73. Each air injection device 85 can blow down air toward the projecting end portion 78 of each arm 72. In addition, each air ejecting device 85 ejects air so that the ejected air is directed toward the projecting end portion 78 of the arm 72 from the side surface 14 d of the electrode assembly 14 placed on the conveyance jig 70.

Next, the operation of the electrode assembly transport device 69 will be described.
First, as shown in FIG. 5, the electrode assembly 14 is restrained by a restraining jig 40. Next, as shown in FIG. 8, the restraining jig 40 is placed on the transport jig 70 supported by the pedestal 86, and the restraining jig 40 is positioned on the transport jig 70. At this time, in each arm 72 of the conveying jig 70, the protruding end portion 78 protrudes from the side surface 14d of the electrode assembly 14, and the positioning recess 73 is located away from the side surface 14d of the electrode assembly 14.

  Next, the transfer table 80 in the thickness adjusting device moves toward the conveying jig 70 outside the thickness adjusting device, and each positioning projection 82 of the transfer table 80 is below the positioning recess 73 of each arm 72. To position. At this time, as shown in FIG. 11, air is intermittently injected from each air injection device 85 toward each arm 72, and the air is blown down. Air injection is continued until the transfer table 80 starts moving toward the thickness adjusting device.

  Subsequently, when the pedestal 86 is lowered and the conveying jig 70 is lowered, as shown in FIG. 9B or FIG. 12, the positioning convex portion 82 is inserted into the positioning concave portion 73, and the upper surface 80a of the transfer table 80. The lower surface 72 a of each arm 72 is supported, and the transfer jig 70 is supported by the transfer table 80.

  Then, the transfer table 80 moves toward the thickness adjusting device to transfer the conveying jig 70, and the electrode assembly 14 restrained by the restraining jig 40 is conveyed toward the thickness adjusting device. Thereafter, the thickness of the electrode assembly 14 is adjusted by the thickness adjusting device. After the thickness adjustment, the transfer table 80 supporting the transfer jig 70 moves from the thickness adjustment device toward the pedestal 86, the transfer jig 80 is transferred by the transfer table 80, and the electrode assembly 14 faces the pedestal 86. Be transported. When the conveying jig 70 is transferred to above the pedestal 86, the pedestal 86 rises and the conveying jig 70 is lifted by the pedestal 86. Then, the positioning convex portion 82 is extracted from the positioning concave portion 73 of the arm 72.

According to the above embodiment, the following effects can be obtained.
(1) In a state where the electrode assembly 14 is placed on the conveying jig 70, a positioning recess 73 is provided in the projecting end portion 78 of the arm 72 from the side surface 14 d of the electrode assembly 14, and the positioning recess 73 is formed on the electrode assembly 14. Away from. Therefore, the positioning recess 73 is not at the main body 71 a that supports the electrode assembly 14 but at a position away from the electrode assembly 14. For this reason, when the positioning convex portion 82 is inserted into the positioning concave portion 73, the inner peripheral surface of the positioning concave portion 73 interferes with the positioning convex portion 82, and even if a foreign matter is generated, the foreign matter is not removed from the electrode assembly 14. It is hard to adhere to.

  Further, the air injection device 85 is in a position to blow down air toward the positioning recess 73 of the arm 72. For this reason, even if the positioning convex portion 82 and the positioning concave portion 73 interfere with each other and foreign matter is generated, the foreign matter can be blown down below the electrode assembly 14 by air injection, and the foreign matter adheres to the electrode assembly 14. Can be suppressed.

  (2) The positioning concave portion 73 exists within the thickness of the arm 72, and the upper portion of the positioning concave portion 73 is covered with a covering portion 79. For this reason, it is possible to suppress the foreign matter generated in the positioning recess 73 from being directed to the electrode assembly 14 above the positioning recess 73 by the covering portion 79, and to prevent the foreign matter from adhering to the electrode assembly 14.

  (3) The positioning convex portion 82 has a tapered shape as it protrudes from the upper surface 80a of the transfer table 80, and the positioning concave portion 73 has a tapered shape whose opening width becomes narrower from the lower surface 72a of the arm 72 upward. For this reason, when the positioning convex portion 82 is inserted into the positioning concave portion 73, the positioning concave portion 73 extends along the positioning convex portion 82, and the outer peripheral surface of the positioning convex portion 82 is less likely to come into contact with the inner peripheral surface of the positioning concave portion 73. Become. As a result, the positioning convex portion 82 and the positioning concave portion 73 do not easily interfere with each other, and the generation of foreign matters can be suppressed.

  (4) The positioning convex portion 82 includes a solid lubricating layer 82a on the outer peripheral surface, and the slidability on the outer peripheral surface of the positioning convex portion 82 is enhanced. For this reason, the slidability of the inner peripheral surface of the positioning concave portion 73 with respect to the outer peripheral surface of the positioning convex portion 82 is improved, and the generation of foreign matters from the inner peripheral surface of the positioning concave portion 73 can be suppressed.

  (5) The conveying jig 70 has a shape including a pair of arms 72 protruding from the respective short sides that are opposite sides of the rectangular main body 71a, and the restraining plates 50 and 60 of the restraining jig 40 are also rectangular. The shape includes a pair of projecting portions 51 and 61 projecting from the short sides of the main body portions 50a and 60a. In a state where the restraining jig 40 is placed on the transport jig 70, the protrusions 51 and 61 of the restraining jig 40 are placed on the arms 72 of the transport jig 70. Therefore, even when the restraining jig 40 is placed on the conveying jig 70, the laminated end face 14a, the tab side end face 14b, the bottom face 14c and the side face 14d of the electrode assembly 14 can be exposed, and the laminated end face 14a. The first to third tapes 97a to 97c can be attached to the tab side end surface 14b, the bottom surface 14c, and the side surface 14d.

  (6) The positioning recess 73 includes an opening 73a that opens at the protruding end surface of the arm 72 from the main body 71a. For this reason, about the inner peripheral surface of the positioning recessed part 73, the location which contacts the positioning convex part 82 is reduced and it is easy to suppress generation | occurrence | production of a foreign material.

  (7) The air ejection device 85 is disposed above the restraining jig 40 that restrains the electrode assembly 14 and is in a position to eject air to the positioning recess 73 of the arm 72. Therefore, the air injected from the air injection device 85 is injected in a direction away from the electrode assembly 14. Therefore, the foreign matter can be blown away by the air in a direction away from the electrode assembly 14, and the foreign matter can be prevented from adhering to the electrode assembly 14.

In addition, you may change the said embodiment as follows.
The positioning recess 73 may have a shape that is not provided with the opening 73 a on the protruding end surface of the arm 72 and is recessed in a circular hole shape from the lower surface 72 a of the arm 72.

The positioning convex part 82 does not need to be provided with the solid lubricating layer 82a.
The solid lubricating layer 82a may be provided by tin plating instead of fluorine coating.

  A solid lubricating layer may also be provided on the inner peripheral surface of the positioning recess 73 to improve the slidability of the inner peripheral surface of the positioning recess 73. Alternatively, the solid lubricating layer 82 a of the positioning convex portion 82 may be eliminated, and the solid lubricating layer may be provided only on the inner peripheral surface of the positioning concave portion 73.

The positioning recess 73 may not be covered by the covering portion 79 and may have a shape penetrating the arm 72 in the vertical direction.
The positioning protrusion 82 has a shape that protrudes from the upper surface 80a of the transfer table 80 with a constant diameter, and does not have to be a tapered shape.

The positioning recess 73 may have a shape that is recessed from the lower surface 72a of the protruding end 78 with a constant opening width.
(Circle) the air injection apparatus 85 may be arrange | positioned just above the positioning recessed part 73. FIG. In short, as long as the foreign matter generated at the position where the positioning projection 82 is inserted into the positioning recess 73 can be blown down below the electrode assembly 14, the arrangement position of the air injection device 85 may be changed as appropriate. Further, the number of the air injection devices 85 may be one, two, three, or five or more as long as air can be blown down to all the insertion positions of the positioning convex portion 82 with respect to the positioning concave portion 73.

O The air injection from the air injection device 85 may be performed continuously instead of intermittently.
○ One positioning convex portion 82 may be provided on the transfer table 80. In this case, in the conveyance jig 70, the arm 72 may have a shape protruding one by one from the side surface on the short side of the main body 71a. Alternatively, three or more positioning convex portions 82 may be provided on the transfer table 80. In this case, in the conveying jig 70, the arms 72 have a shape that protrudes from the side surface on the short side of the main body 71a by three or more.

The material of the jig body 71 including the positioning recess 73 and the positioning protrusion 82 may be changed to other stainless steel or other metal.
The transfer jig 70 may not include the interposition member 76. In this case, the electrode assembly 14 is directly placed on the main body 71a of the transfer jig 70.

In the conveying jig 70, the interposed member 76 may be made of resin.
The transport device 69 has been used to move the electrode assembly 14 in and out of the thickness adjusting device, but may be used to transport the electrode assembly 14 to other devices. For example, the electrode assembly 14 may be used for transporting to an apparatus for housing the case 11. In this case, since the electrode assembly 14 is held by the first to third tapes 97 a to 97 c, the electrode assembly 14 may not be restrained by the restraining jig 40, and the electrode assembly 14 is attached to the transport jig 70. It may be placed directly.

  The positive electrode 15 may be a type having the positive electrode active material layer 17 on one side of the positive electrode metal foil 16, and the negative electrode 19 may be a type having the negative electrode active material layer 21 on one side of the negative electrode metal foil 20.

The electrode assembly 14 may be a wound type in which one strip-shaped positive electrode and one strip-shaped negative electrode are wound around a winding shaft in a state where the strip is insulated with a separator.
The power storage device may be another power storage device such as an electric double layer capacitor.

  In embodiment, although the secondary battery 10 was a lithium ion secondary battery, it is not restricted to this, Other secondary batteries, such as nickel hydride, may be sufficient. In short, any ion may be used as long as ions move between the positive electrode active material layer and the negative electrode active material layer and transfer charge.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(1) The apparatus for transporting an electrode assembly, wherein the positioning recess includes an opening that opens at a protruding end surface of the arm from the main body.

  DESCRIPTION OF SYMBOLS 14 ... Electrode assembly, 14d ... Side surface, 15 ... Positive electrode as an electrode, 19 ... Negative electrode as an electrode, 71a ... Main part, 70 ... Conveying jig, 72 ... Arm, 72a ... Lower surface, 73 ... Positioning recessed part, 78 ... Projection end part, 79 ... Covering part, 80 ... Transfer table, 80a ... Upper surface, 82 ... Positioning convex part, 82a ... Solid lubricating layer, 85 ... Air injection device.

Claims (4)

A main body portion on which an electrode assembly having a plurality of sheet-like electrodes is placed, and a conveyance jig including an arm having a shape protruding laterally from the main body portion;
A transfer table for transferring the transfer jig with the arm supported on the upper surface;
A positioning protrusion having a shape protruding from the upper surface of the transfer table;
In the arm, a positioning recess that is present at a protruding end protruding sideward from the side surface of the electrode assembly, and the positioning protrusion is inserted from below,
An apparatus for transporting an electrode assembly, comprising: an air injection device capable of blowing air toward an insertion portion of the positioning convex portion with respect to the positioning concave portion.   The said conveying jig is a conveying apparatus of the electrode assembly of Claim 1 provided with the coating | coated part which covers the said positioning recessed part from upper direction in the said protrusion end part.   2. The positioning convex portion has a shape that tapers as it protrudes from the upper surface of the transfer table, and the positioning concave portion has a shape that gradually reduces the opening width as it is recessed from the lower surface of the protruding end portion. Item 3. The electrode assembly transport apparatus according to Item 2.   The said positioning convex part is a conveyance apparatus of the electrode assembly as described in any one of Claims 1-3 provided with a solid-lubricating layer in an outer peripheral surface.

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