JP2019021485A - Manufacturing installation of power storage device - Google Patents

Abstract

To provide a manufacturing installation of power storage device capable of taking out an electrode under high speed conveyance, while suppressing damage on the end of the electrode.SOLUTION: An extractor 13 includes a cylindrical suction roll 14 placed on the underside of an electrode 40, and sucking the electrode 40, and first and second backup rolls 19a, 19b placed above the electrode 40. The suction roll 14 has a first roll 17, and a second roll 18 rotating normally around the first roll 17. The second roll 18 has a protrusion 22 protruding radially outward from the outer peripheral surface of the cylindrical body part 21, and extending spirally over the whole circumference of the body part 21. The first and second backup rolls 19a, 19b include multiple roll members 32 rotating normally in the width direction X3. The roll member 32 includes a roll body 33, and multiple convex portions 34 of convex shape from the outer peripheral surface of the roll body 33 to the radial outside. The extension direction Y2 of the convex portions 34 is inclining for the transport direction X1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for manufacturing a power storage device including an extraction device that extracts a part of electrodes from a plurality of electrodes conveyed at high speed.

  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 positive electrode and a negative electrode are stacked via a separator. The manufacturing process of the secondary battery includes a cutting process of cutting the strip-shaped electrode material into an electrode shape, a transporting process of transporting the cut electrode, and a stacking process of stacking the electrodes to manufacture an electrode assembly. . For example, an adsorption conveyance conveyor disclosed in Patent Document 1 is used in the conveyance step. The adsorption conveyance conveyor conveys the electrode while adsorbing it. In order to improve the productivity of the secondary battery, the electrode is conveyed at high speed, and the time required for the conveyance process is shortened.

JP 2013-136437 A

  By the way, in a cutting process, a burr | flash may arise in the cut surface of an electrode, ie, the edge part of an electrode. When a positive electrode and a negative electrode in which burrs are generated at the end are stacked via a separator, the burrs may penetrate the separator, and the positive electrode and the negative electrode may be short-circuited via the penetrating burrs. Therefore, it is necessary to inspect whether or not burrs are generated at the ends of the electrodes. Such an inspection is performed during the conveyance process in order to suppress a decrease in the productivity of the secondary battery. And when the burr | flash has generate | occur | produced in the edge part of an electrode, an applicable electrode is taken out and collect | recovered from several electrodes currently conveyed at high speed. The collected electrode is used, for example, to investigate the cause of burr. In some cases, some of the electrodes are periodically or randomly taken out from the plurality of electrodes being conveyed at high speed, and it is inspected whether or not burrs are generated on the taken-out electrodes. The extraction of the electrode is performed by, for example, discharging the electrode in the surface direction. At this time, if the end portion of the electrode is damaged, it becomes difficult to investigate the cause of the subsequent generation of burrs and to check for the presence of burrs.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an apparatus for manufacturing a power storage device that can take out an electrode during high-speed conveyance while suppressing damage to the end portion of the electrode. There is to do.

  An apparatus for manufacturing a power storage device for solving the above problems is arranged between a plurality of suction conveyance conveyors that adsorb sheet-like electrodes and convey them at high speed, and the adsorption conveyance conveyors in the conveyance direction of the electrodes. An extraction device that extracts some of the electrodes from the plurality of electrodes to be conveyed, and the extraction device includes a cylindrical suction roll disposed on the lower side of the electrode, and a conveyance direction of the electrode on the upper side of the electrode A plurality of backup rolls arranged side by side, the position of the suction roll, the extraction position where the apex of the suction roll pushes up the lower surface of the electrode, the lower side of the extraction position, and does not contact the electrode A control device that controls to the standby position, and a decompression device that constantly depressurizes the internal space of the suction roll, and the suction roll has a first decompressed internal space by the decompression device. A roll, and a second roll that is positioned on an outer periphery of the first roll and that rotates constantly with respect to the first roll. The first roll penetrates the first roll in a radial direction, and the first roll A first hole communicating with the inner space of one roll, the first hole having a pair of inner surfaces facing the circumferential direction of the first roll, and one of the pair of inner surfaces; An inner side surface of the second roll is positioned upstream of the apex in the transport direction, the other inner side is positioned downstream of the apex in the transport direction, and the second roll includes a cylindrical main body and the main body. A protrusion that protrudes radially outward from the outer peripheral surface of the portion and extends spirally over the entire periphery of the main body, and a plurality of second holes that penetrate the second roll in the radial direction. The direction in which the protrusions extend is inclined with respect to the transport direction of the electrodes, The hole portion is disposed in the projecting portion, and a part of the plurality of second hole portions communicates with the first hole portion while the second roll is always rotated. The total volume of the internal space of the part of the second hole portion that is disposed in communication with the first hole portion is smaller than the volume of the internal space of the first hole portion, and the transport direction and the vertical direction are When the direction orthogonal to the width direction is the width direction, the plurality of backup rolls are provided with a plurality of roll members that rotate constantly in the width direction, and between the backup rolls adjacent in the transport direction, both roll members are in the width direction. Alternatingly arranged, the roll member includes a roll main body and a plurality of convex portions projecting radially outward from an outer peripheral surface of the roll main body, and a direction in which the convex portion extends is the transport direction. It must be inclined with respect to Let ’s do it.

  According to this, in order to take out the electrode by always having the suction force and moving the rotating suction roll to the take-out position, for example, compared with the case of generating the suction force after moving the suction roll to the take-out position The electrode can be removed immediately. Therefore, even an electrode being conveyed at high speed can be taken out by the take-out device. Moreover, since the adsorption | suction roll adsorbs and takes out the lower surface of an electrode, the damage to the edge part of the electrode at the time of taking out can be suppressed. Further, the volume gradually decreases in the order of the internal space of the first roll, the internal space of the first hole, and the internal space of a part of the second holes communicating with the first hole. For this reason, the suction force of the suction roll is maximized in the second hole portion having the smallest volume, and can be sucked even by the electrode conveyed at high speed. Further, when the suction roll is in the take-out position, the electrode is pushed up by the suction roll and is sandwiched between the second roll of the suction roll and the roll members of the plurality of backup rolls. Therefore, it is possible to sufficiently apply force in the transport direction and the width direction to the electrode from the second roll and the roll member, and it becomes easier to take out the electrode. Moreover, since the main-body part of a 2nd roll is provided with the groove | channel comprised by the clearance gap between adjacent protrusion parts, compared with the case where a groove | channel is not provided, the contact area of the outer peripheral surface of a 2nd roll and an electrode is small. Become. Therefore, even if the foreign matter adheres to the second roll, the foreign matter can be prevented from adhering to the lower surface of the electrode.

  Moreover, about the manufacturing apparatus of the said electrical storage apparatus, it is preferable that the inclination angle of the direction where the said protrusion part is extended with respect to the said conveyance direction and the inclination angle of the direction where the said convex part is extended with respect to the said conveyance direction are the same.

  According to this, since the direction of the force applied from the suction roll to the electrode is the same as the direction of the force applied from the backup roll to the electrode, generation of wrinkles of the electrode when the electrode is sandwiched between the suction roll and the backup roll Can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the electrode in high speed conveyance can be taken out, suppressing the damage to the edge part of an electrode.

(A) is a side view of the manufacturing apparatus of the secondary battery of embodiment, (b), (c) is a top view of the manufacturing apparatus of the secondary battery of embodiment. The perspective view of the adsorption | suction roll of embodiment. (A), (b) is a side view of an extraction device.

  Hereinafter, an embodiment in which a manufacturing apparatus for a power storage device is embodied as a manufacturing apparatus for a secondary battery will be described with reference to FIGS. The secondary battery manufacturing apparatus of this embodiment manufactures an electrode assembly used in a lithium ion battery.

  As shown in FIG. 1A, the secondary battery manufacturing apparatus 10 includes a suction conveyance conveyor 11 that sucks and conveys a sheet-like electrode 40 at a high speed. Here, high speed conveyance refers to a case where the conveyance speed is about 50 to 80 m / s. A direction in which the electrode 40 is transported by the suction transport conveyor 11 is defined as a transport direction X1, and a direction constituting the thickness of the electrode 40 is defined as a vertical direction X2. A direction orthogonal to the transport direction X1 and the up-down direction X2 is defined as a width direction X3.

  The suction conveyance conveyor 11 includes first to fourth suction conveyance conveyors 11a to 11d. The 1st-4th adsorption conveyance conveyors 11a-11d are arrange | positioned in order along the conveyance direction X1. The 1st adsorption conveyance conveyor 11a is arrange | positioned under the electrode 40 in the up-down direction X2, and adsorb | sucks the lower surface 40b of the electrode 40. FIG. The second suction transport conveyor 11b is disposed downstream of the first suction transport conveyor 11a in the transport direction X1 and above the electrode 40 in the vertical direction X2, and sucks the upper surface 40a of the electrode 40. Part of the transport direction X1 of the first suction transport conveyor 11a and part of the transport direction X1 of the second suction transport conveyor 11b overlap in the vertical direction X2. The third suction transfer conveyor 11c is disposed downstream of the second suction transfer conveyor 11b in the transfer direction X1 and above the electrode 40 in the vertical direction X2, and sucks the upper surface 40a of the electrode 40. In the transport direction X1, the distance between the second suction transport conveyor 11b and the third suction transport conveyor 11c is smaller than the dimension of the electrode 40. An area between the second suction transfer conveyor 11b and the third suction transfer conveyor 11c in the transfer direction X1 is defined as an extraction area A. The fourth suction transport conveyor 11d is disposed downstream of the third suction transport conveyor 11c in the transport direction X1 and below the electrode 40 in the vertical direction X2, and sucks the lower surface 40b of the electrode 40. Part of the transport direction X1 of the third suction transport conveyor 11c and part of the transport direction X1 of the fourth suction transport conveyor 11d overlap in the vertical direction X2.

  The secondary battery manufacturing apparatus 10 includes an inspection apparatus 12 that inspects the electrode 40. The inspection apparatus 12 includes a first inspection unit 12a disposed on the upper side of the electrode 40 adsorbed on the first suction conveyance conveyor 11a and a first electrode disposed on the lower side of the electrode 40 adsorbed on the second adsorption conveyance conveyor 11b. 2 inspection unit 12b. The inspection device 12 of this embodiment inspects the presence or absence of burrs at the end of the electrode 40. The inspection device 12 determines that the electrode 40 is a non-defective product when there is no burr at the end of the electrode 40, and determines that the electrode 40 is a defective product when there is a burr at the end of the electrode 40.

  The secondary battery manufacturing apparatus 10 includes an extraction device 13 that extracts some of the electrodes 40 from the plurality of electrodes 40 conveyed by the adsorption conveyance conveyor 11. In the present embodiment, the take-out device 13 takes out the electrode 40 determined as a defective product as a result of the inspection by the inspection device 12.

  The take-out device 13 includes a cylindrical suction roll 14 that sucks the electrode 40, a control device 15 that controls the position of the suction roll 14, and an exhaust fan 16 that serves as a decompression device that constantly depressurizes the internal space of the suction roll 14. Prepare.

  The suction roll 14 is disposed below the electrode 40 in the extraction area A. The axial direction of the suction roll 14 coincides with the width direction X3. As shown in FIG. 2, the suction roll 14 is a non-rotating cylindrical first roll 17 and a cylindrical second roll 18 that is positioned on the outer periphery of the first roll 17 and always rotates with respect to the first roll 17. With. As shown in FIG. 1, the portion located on the uppermost side in the vertical direction X <b> 2 in the second roll 18 is defined as a vertex P. The suction roll 14 is arranged in the vertical direction X2 between the take-out position where the apex portion P of the second roll 18 pushes up the lower surface 40b of the electrode 40 and the standby position below the take-out position and not in contact with the conveyed electrode 40. It is movable.

  The control device 15 positions the suction roll 14 at the standby position during normal times. The normal time is when the electrode 40 is not conveyed and the inspection device 12 is not inspected, or when the electrode 40 is determined to be non-defective as a result of the inspection by the inspection device 12. The control device 15 is signal-connected to the inspection device 12. If the first and second inspection units 12 a and 12 b determine that the electrode 40 is defective, the first and second inspection units 12 a and 12 b transmit a signal to the control device 15. When the control device 15 receives a signal from at least one of the first and second inspection units 12a and 12b, the suction roll 14 is positioned at the extraction position when the electrode 40 determined to be defective is conveyed to the extraction area A. Thus, the suction roll 14 is raised from the standby position to the take-out position at a high speed. The distance from the first inspection unit 12a to the extraction area A is longer than the distance from the second inspection unit 12b to the extraction area A. Therefore, the moving speed of the suction roll 14 when the first inspection unit 12a determines that the product is non-defective and the second inspection unit 12b determines that the product is defective is the movement when the first inspection unit 12a determines that the product is defective. Be faster than speed.

  Exhaust fans 16 are connected to both ends of the first roll 17 in the axial direction. The exhaust fan 16 depressurizes the internal space S17 by constantly discharging the air in the internal space S17 of the first roll 17 to the outside of the suction roll 14. The first roll 17 has a first hole 17 a that penetrates the first roll 17 in the radial direction and communicates with the internal space S <b> 17 of the first roll 17. The dimension of the first hole 17a in the axial direction of the first roll 17 is substantially the same as the dimension of the electrode 40 in the width direction X3. The first hole portion 17 a exists at the center in the axial direction of the first roll 17.

  As shown in FIG. 2, the first hole portion 17 a includes a pair of inner side surfaces B <b> 1 and B <b> 2 that face the circumferential direction of the first roll 17, and a pair of inner side surfaces C <b> 1 and C <b> 2 that face the axial direction of the first roll 17. Have A space surrounded by the inner side surfaces B1, B2, C1, and C2 is defined as an internal space S17a of the first hole portion 17a. The volume of the internal space S17a is smaller than the volume of the internal space S17 of the first roll 17.

  As shown in FIGS. 3A and 3B, one inner surface B1 of the first roll 17 is upstream of the apex P in the transport direction X1, and the other inner surface B2 is in the transport direction. It is downstream from the apex P at X1. The angle α formed by one inner surface B1 and the straight line L connecting the apex portion P and the central axis of the first roll 17 is 20 degrees in the present embodiment. In addition, the angle β formed by the other inner surface B2 and the straight line L connecting the apex portion P and the central axis of the first roll 17 is 20 degrees in the present embodiment. That is, the angle α + β (hereinafter referred to as the angle α + β of the first hole portion 17a) formed by the pair of inner side surfaces B1, B2 is 40 degrees in the present embodiment. The angles α and β may be appropriately changed within a range of 10 to 30 degrees, and the angles α and β may be different angles.

  The second roll 18 is rotated by a motor (not shown). The rotation direction of the second roll 18 is a direction in which the upper portion of the vertical direction X2 is directed from the upstream side to the downstream side in the transport direction X1. A speed at which the electrode 40 is fed in the transport direction X1 by the rotation of the second roll 18 is defined as a feed speed. The rotation speed of the second roll 18 is set so that the feed-out speed matches the transport speed of the electrode 40 by the suction transport conveyor 11.

  As shown in FIG. 2, the second roll 18 of the suction roll 14 protrudes radially outward from the outer peripheral surface of the cylindrical main body 21 and the main body 21 and spirals over the entire circumference of the main body 21. And a plurality (two in this embodiment) of protrusions 22 extending in the direction. The protruding portion 22 is disposed in a spiral shape with respect to the main body portion 21. As shown in FIG. 1B, in the side view when the suction roll 14 is viewed from the radial direction, the direction Y1 in which the protrusion 22 extends is at an inclination angle θ1 (30 degrees in the present embodiment) with respect to the transport direction X1. Inclined. In addition, inclination-angle (theta) 1 is not limited to 30 degree | times, You may change in the range of 30-45 degree | times. The main body 21 has a groove 21 a formed by a gap between the protrusions 22 adjacent to each other in the axial direction of the main body 21.

  The second roll 18 of the suction roll 14 has a plurality of second hole portions 18 a that penetrate the second roll 18 in the radial direction. The cross-sectional shape of the second hole 18a along the circumferential direction of the second roll 18 is a circular shape. The plurality of second hole portions 18a are arranged at equal intervals in a line along the direction Y1 in which the protruding portion 22 extends. That is, the plurality of second hole portions 18a are spirally arranged with respect to the main body portion 21, and the direction in which the second hole portions 18a are arranged is inclined at an inclination angle θ1 with respect to the transport direction X1. The volume of the internal space S18a of each second hole 18a is smaller than the volume of the internal space S17a of the first hole 17a. Further, as shown in FIGS. 3A and 3B, the angle γ formed between the central axes M of the adjacent second hole portions 18a in the circumferential direction of the second roll 18 is the first It is smaller than the angle α + β of the first hole portion 17 a of the roll 17. For this reason, regardless of the rotation angle of the second roll 18, a part of the second hole portions 18 a (three in the circumferential direction of the second roll 18 in this embodiment) are always the first hole portions 17 a of the first roll 17. And overlap in the circumferential direction. That is, in a state where the second roll 18 is always rotated, a part of the second hole portions 18a among the plurality of second hole portions 18a communicates with the internal space S17a of the first hole portion 17a in the radial direction. The total volume of the internal space S18a of a part of the second hole 18a communicating with the first hole 17a is smaller than the volume of the internal space S17a of the first hole 17a.

  The internal space S17 of the first roll 17 is outside the suction roll 14 by the internal space S17a of the first hole 17a and the internal space S18a of the second hole 18a of the second roll 18 that overlaps the first hole 17a. Communicate. Therefore, when the internal space S17 of the first roll 17 is depressurized by the exhaust fan 16, the internal space S17a of the first hole 17a of the first roll 17 is depressurized, and the second hole 18a of the second roll 18 is further reduced. The internal space S18a is decompressed. As described above, the volume of each internal space S17, S17a, S18a is such that the internal space S17 of the first roll 17, the internal space S17a of the first hole 17a, and a part of the second holes communicating with the first hole 17a. It becomes smaller stepwise in the order of the internal space S18a of the portion 18a. Therefore, the pressure in each of the internal spaces S17, S17a, S18a is such that the internal space S17 of the first roll 17, the internal space S17a of the first hole 17a, and a part of the second hole 18a that communicates with the first hole 17a. The inner space S18a becomes smaller step by step. Therefore, the suction roll 14 has the maximum suction force in the second hole 18a of the second roll 18 that overlaps with the first hole 17a of the first roll 17 in the circumferential direction and has the smallest volume (pressure). In other words, the suction roll 14 has a suction force in the second hole portion 18a in the range of the angle α + β. It is assumed that the suction force of the second hole 18 a of the second roll 18 does not reach the electrode 40 when the suction roll 14 is in the standby position described above.

  The take-out device 13 includes a first backup roll 19a and a second backup roll 19b as backup rolls arranged in parallel in the transport direction X1 above the suction roll 14. In FIG. 1B, the first and second backup rolls 19a and 19b are not shown. The first backup roll 19a is disposed upstream of the suction roll 14 in the transport direction X1 and above the electrode 40 in the vertical direction X2. The second backup roll 19b is disposed downstream of the suction roll 14 in the transport direction X1 and above the electrode 40 in the vertical direction X2. The apex P of the suction roll 14 is located between the bottom Q of the first backup roll 19a and the bottom Q of the second backup roll 19b in the transport direction X1. As shown in FIG. 3A, when the suction roll 14 is in the standby position, there is a slight gap between the bottom Q of the first and second backup rolls 19a and 19b and the upper surface 40a of the electrode 40. . On the other hand, as shown in FIG. 3B, when the suction roll 14 is in the take-out position, the bottom portions Q of the first and second backup rolls 19 a and 19 b are in contact with the upper surface 40 a of the electrode 40.

  As shown in FIG. 1C, each of the first and second backup rolls 19a and 19b includes a plurality (six in this embodiment) of cylindrical roll members 32 in the width direction X3. The roll member 32 is made of rubber. The plurality of roll members 32 are supported by one shaft portion 31. In the width direction X3, the roll member 32 of the first backup roll 19a is disposed between the roll members 32 of the second backup roll 19b, and the roll member 32 of the second backup roll 19b is the roll of the first backup roll 19a. It arrange | positions between the members 32. That is, the roll member 32 of the first backup roll 19a and the roll member 32 of the second backup roll 19b are alternately arranged in the width direction X3. Each roll member 32 is always rotated by always rotating the shaft portion 31 by a motor (not shown). The rotation direction of each roll member 32 is a direction in which the lower part of the vertical direction X2 is directed from the upstream side to the downstream side in the transport direction X1. The rotation speeds of the roll members 32 of the first and second backup rolls 19a and 19b are the same for all the roll members 32, and the feed speed is set so as to coincide with the transport speed of the electrodes 40 by the suction transport conveyor 11. Yes.

  Each roll member 32 includes a roll main body 33 and a plurality of convex portions 34 that are convex outward from the outer peripheral surface of the roll main body 33 in the radial direction. The plurality of convex portions 34 are arranged at intervals in the circumferential direction of the roll body 33. Further, in a side view of the roll member 32 viewed from the radial direction, the direction Y2 in which the convex portion 34 extends is inclined at an inclination angle θ2 (30 degrees in the present embodiment) with respect to the transport direction X1. That is, the inclination angle θ2 in the direction Y2 in which the convex portions 34 of the first and second backup rolls 19a and 19b extend with respect to the transport direction X1 is in the direction Y1 in which the protrusion 22 of the suction roll 14 extends in the transport direction X1. It is the same as the inclination angle θ1. In addition, inclination | tilt angle (theta) 2 is not limited to 30 degree | times, You may change in the range of 30-45 degree | times.

  The secondary battery manufacturing apparatus 10 includes a transport device (not shown) that transports the extracted electrode 40 to a recovery device (not shown). The transport device is disposed downstream of the suction roll 14 in the transport direction X1, below the electrode 40 in the vertical direction X2, and on the side of the third suction transport conveyor 11c in the width direction X3. The collection device according to the present embodiment includes a plurality of pockets and a pocket conveyance unit that circulates and conveys the pockets.

Next, of the manufacturing process of the secondary battery, the electrode transport process, the inspection process, and the removal process will be described in detail. The inspection process and the extraction process are performed during the conveyance process.
As shown in FIG. 3A, before the conveyance of the electrode 40 is started, the second roll 18 of the suction roll 14 located at the standby position is rotating, and the exhaust fan 16 causes the internal spaces S17 and S17a to be rotated. , S18a is depressurized, and an attractive force is generated in the second hole 18a in the range of the angle α + β.

  The conveyance of the electrode 40 is started. The electrode 40 transported from the previous process by a transport device (not shown) is delivered to the first suction transport conveyor 11a. The first suction conveyance conveyor 11a conveys the lower surface 40b of the electrode 40 downstream in the conveyance direction X1 while adsorbing the lower surface 40b of the electrode 40. At this time, the first inspection unit 12a inspects the electrode 40. The electrode 40 transported by the first suction transport conveyor 11a is transferred to the second suction transport conveyor 11b. The second suction transport conveyor 11b transports the upper surface 40a of the electrode 40 downstream in the transport direction X1 while sucking the upper surface 40a of the electrode 40. At this time, the second inspection unit 12b inspects the electrode 40.

  And if the 1st test | inspection part 12a and the 2nd test | inspection part 12b determine with the electrode 40 being non-defective, a signal will not be transmitted to the control apparatus 15, but the adsorption | suction roll 14 will remain in the standby position. Then, the electrode 40 conveyed by the 2nd adsorption conveyance conveyor 11b is delivered to the 3rd adsorption conveyance conveyor 11c. The 3rd adsorption conveyance conveyor 11c conveys to the downstream of the conveyance direction X1, adsorb | sucking the upper surface 40a of the electrode 40. FIG. The electrode 40 conveyed by the 3rd adsorption conveyance conveyor 11c is delivered to the 4th adsorption conveyance conveyor 11d. The fourth suction conveyance conveyor 11d conveys the lower surface 40b of the electrode 40 downstream in the conveyance direction X1 while adsorbing the lower surface 40b of the electrode 40. The electrode 40 transported by the fourth suction transport conveyor 11d is transferred to a transport device (not shown) and transported to a subsequent process.

  On the other hand, when the first inspection unit 12a or the second inspection unit 12b determines that the electrode 40 is a defective product, the first inspection unit 12a or the second inspection unit 12b transmits a signal to the control device 15. When receiving a signal from at least one of the first inspection unit 12a and the second inspection unit 12b, the control device 15 raises the suction roll 14 from the standby position to the removal position at high speed. As shown in FIG. 3B, the suction roll 14 is located at the take-out position when the electrode 40 determined to be defective is transported to the take-out area A. Thereby, the electrode 40 is adsorbed by the second roll 18 by the adsorbing force generated in the second hole 18a. The electrode 40 is pushed up by the suction roll 14 toward the first and second backup rolls 19a and 19b, and the outer peripheral surface of the second roll 18 of the suction roll 14 and the first and second backup rolls 19a and 19b. It is clamped by the outer peripheral surface of the member 32. At this time, as the second roll 18 and the roll member 32 rotate, as shown in FIG. 1A, the electrode 40 adsorbed on the second roll 18 is downstream in the transport direction X1 and in the vertical direction X2. It is conveyed downward. Moreover, as shown in FIG.1 (b) and FIG.1 (c) by the 2nd hole 18a and the convex part 34 which are arrange | positioned with inclination-angle (theta) 1, (theta) 2 with respect to the conveyance direction X1, the electrode 40 is shown. It is taken out to the side in the width direction X3. Thereafter, when the second roll 18 further rotates, the second hole 18a facing the electrode 40 is out of the range of the angle α + β and loses the adsorption force. The control device 15 lowers the suction roll 14 to the standby position at a high speed after the electrode 40 is taken out.

  The transport device transports the extracted electrode 40 to the collection device. The electrodes 40 conveyed to the collection device are collected one by one in the pocket conveyed by the pocket conveyance unit. In the present embodiment, the electrode 40 collected in the pocket is used to investigate the cause of burrs.

Next, the effect of this embodiment will be described together with the action.
(1) Since the electrode 40 is taken out by always moving the suction roll 14 having the suction force to the take-out position, compared with, for example, the case where the suction force is generated after the suction roll 14 is moved to the take-out position. Then, the electrode 40 can be taken out immediately. Therefore, even the electrode 40 being conveyed at high speed can be taken out by the take-out device 13. Moreover, since the adsorption | suction roll 14 adsorbs and takes out the lower surface 40b of the electrode 40, the damage to the edge part of the electrode 40 at the time of taking out can be suppressed. Further, the volume gradually decreases in the order of the internal space S17 of the first roll 17, the internal space S17a of the first hole 17a, and the internal space S18a of a part of the second holes 18a communicating with the first hole 17a. . For this reason, the suction force of the suction roll 14 is maximized at the second hole 18a having the smallest volume, and can be attracted even by the electrode 40 that is transported at high speed. Further, when the suction roll 14 is in the take-out position, the electrode 40 is pushed up by the suction roll 14 and is sandwiched between the suction roll 14 and the roll members 32 of the first and second backup rolls 19a and 19b. Therefore, the force in the transport direction X1 and the width direction X3 can be sufficiently applied to the electrode 40 from the second roll 18 and the roll member 32, and the electrode 40 can be easily taken out. Moreover, since the main-body part 21 of the 2nd roll 18 is provided with the groove | channel 21a comprised by the clearance gap between adjacent protrusion parts 22, compared with the case where the groove | channel 21a is not provided, the outer peripheral surface and electrode of the 2nd roll 18 are provided. The contact area with 40 is reduced. Therefore, even if a foreign substance adheres to the second roll 18, it can be suppressed that the foreign substance adheres to the lower surface 40 b of the electrode 40.

  (2) Since the inclination angle θ1 in the direction Y1 in which the protrusion 22 extends with respect to the conveyance direction X1 and the inclination angle θ2 in the direction Y2 in which the protrusion 34 extends in the conveyance direction X1 are the same, the suction roll 14 applies the electrode 40 The direction of the force and the direction of the force applied to the electrode 40 from the roll member 32 of the first and second backup rolls 19a and 19b are the same direction. Therefore, generation | occurrence | production of the wrinkle of the electrode 40 at the time of clamping the electrode 40 with the adsorption | suction roll 14 and the 1st and 2nd backup rolls 19a and 19b can be suppressed.

In addition, you may change the said embodiment as follows.
The electrode 40 taken out by the take-out device 13 may be an inspection electrode that is taken out from the electrode 40 being transported periodically or randomly and inspected. In this case, the inspection process by the inspection apparatus 12 is performed after the extraction process by the extraction apparatus 13.

  O Wear resistant coating (for example, ePTFE, DLC, etc.) may be applied to at least one of the outer peripheral surface of the first roll 17 and the inner peripheral surface of the second roll 18. By the coating, the generation of wear powder due to the sliding between the first roll 17 and the second roll 18 is suppressed, and the generation of foreign matter around the take-out device 13 can be suppressed. Moreover, the resistance at the time of rotation of the 1st roll 17 becomes small, and the energy required for rotation of the 1st roll 17 can be reduced.

  A ball bearing may be disposed between the outer peripheral surface of the first roll 17 and the inner peripheral surface of the second roll 18. However, the pressure reduction state of each internal space S17, S17a, S18a is maintained by providing packing etc. which block | close between the 1st roll 17 and the 2nd roll 18 at the both ends of the suction roll 14 in the axial direction.

  The first hole 17a of the first roll 17 may be filled with a porous solid material or may be covered with a porous solid material. Similarly, the 2nd hole 18a of the 2nd roll 18 may be filled with the porous solid material, and may be covered with the porous solid material.

  (Circle) the number of the protrusion parts 22 of the 2nd roll 18 is not limited to two, Three or more may be sufficient. Further, the number may be one as long as it extends spirally over the entire circumference of the main body 21. When there is one protrusion, the groove is composed of the outer peripheral surface of the main body and the side surfaces of the one protrusion that are adjacent to each other in the axial direction of the main body.

○ The backup roll arranged in parallel in the transport direction X1 is not limited to two sets, and may be three sets or more.
The number of roll members 32 included in the first and second backup rolls 19a and 19b is not limited to six, and may be appropriately changed according to, for example, the dimension of the electrode 40 in the width direction X3.

  ○ If the feed speed of the electrode 40 by each roll member 32 of the first backup roll 19a matches the feed speed of the electrode 40 by each roll member 32 of the second backup roll 19b, the diameter of the roll member 32 may be different. Good.

  The angle γ formed between the second hole portions 18a adjacent to each other in the circumferential direction of the second roll 18 is appropriately changed within a range smaller than the angle α + β of the first hole portion 17a of the first roll 17. Good.

  (Circle) the cross-sectional shape of the 2nd hole 18a is not limited to circular shape, Ellipse shape and multi-angle shape may be sufficient. Moreover, the cross-sectional shape of the second hole 18a may not be the same in all the second holes 18a.

(Circle) the cross-sectional shape of the 2nd roll 18 is not limited to a circle, A 18-36 angle form may be sufficient.
The decompression device is not limited to the exhaust fan 16. The decompression device only needs to be able to decompress the internal space of the suction roll 14, and may be a suction device such as a vacuum pump that sucks air in the internal space of the suction roll 14.

The taken-out electrode 40 may be collected by a plurality of sheets and stored in a pocket.
(Circle) the electrode 40 may be an electrode used for other secondary batteries other than a lithium ion secondary battery. Moreover, the electrode 40 may be an electrode used for a power storage device other than the secondary battery, such as a capacitor.

  DESCRIPTION OF SYMBOLS 10 ... Secondary battery manufacturing apparatus as an electrical storage apparatus manufacturing apparatus, 11 ... Adsorption conveyance conveyor, 13 ... Extraction apparatus, 14 ... Adsorption roll, 15 ... Control apparatus, 16 ... Decompression apparatus, 17 ... First roll, 17a ... 1st hole part, 18 ... 2nd roll, 18a ... 2nd hole part, 19a ... 1st backup roll as a backup roll, 19b ... 2nd backup roll as a backup roll, 21 ... Main-body part, 22 ... Projection part, 32 ... roll member, 33 ... roll body, 34 ... convex part, 40 ... electrode, X1 ... conveying direction, X2 ... vertical direction, X3 ... width direction, Y1 ... projection extending direction, Y2 ... projection extending direction, P ... apex, Q ... bottom, S17, S17a, S18a ... internal space, [theta] 1, [theta] 2 ... inclination angle.

Claims (2)

A plurality of suction conveyance conveyors that adsorb sheet-like electrodes and convey them at high speed, and an extraction device that is arranged between the adsorption conveyance conveyors in the electrode conveyance direction and extracts some of the plurality of electrodes that are conveyed at high speed And
The take-out device is
A cylindrical suction roll disposed under the electrode;
A plurality of backup rolls arranged side by side in the conveying direction of the electrode on the upper side of the electrode;
A control device that controls the position of the suction roll to a take-out position in which the apex of the suction roll pushes up the lower surface of the electrode, and a standby position that is lower than the take-out position and does not contact the electrode;
A decompression device that constantly decompresses the internal space of the suction roll;
With
The suction roll has a first roll whose internal space is decompressed by the decompression device, and a second roll that is positioned on the outer periphery of the first roll and rotates constantly with respect to the first roll,
The first roll has a first hole portion that penetrates the first roll in a radial direction and communicates with an internal space of the first roll, and the first hole portion is arranged in a circumferential direction of the first roll. It has a pair of opposing inner surfaces, and one inner surface of the pair of inner surfaces is located upstream from the apex in the transport direction, and the other inner surface is downstream from the apex in the transport direction. Located in
The second roll has a cylindrical main body portion, a protruding portion that protrudes radially outward from the outer peripheral surface of the main body portion, and extends spirally over the entire circumference of the main body portion, and the second roll has a diameter. A plurality of second hole portions penetrating in a direction, and a direction in which the protruding portion extends is inclined with respect to a conveying direction of the electrode, and the plurality of second hole portions are disposed in the protruding portion. In addition, in a state where the second roll is always rotating, a part of the plurality of second holes is arranged so that a part of the second holes communicates with the first hole, The total volume of the internal space of the part of the second holes communicating with each other is smaller than the volume of the internal space of the first hole,
When the direction perpendicular to the transport direction and the vertical direction is the width direction,
The plurality of backup rolls are provided with a plurality of roll members that rotate at all times in the width direction, and between the backup rolls adjacent in the transport direction, both roll members are alternately arranged in the width direction, and the roll members are: A roll main body, and a plurality of convex portions projecting radially outward from the outer peripheral surface of the roll main body, and a direction in which the convex portion extends is inclined with respect to the transport direction. An apparatus for manufacturing a power storage device. 2. The power storage device manufacturing apparatus according to claim 1, wherein an inclination angle in a direction in which the projecting portion extends with respect to the transport direction and an inclination angle in a direction in which the convex portion extends with respect to the transport direction are the same.