JP6870233B2 - Electrode manufacturing equipment - Google Patents

Description

The present invention relates to an electrode manufacturing apparatus that cuts an electrode material provided with a coated portion of an active material mixture formed on the surface of a long metal foil into the shape of an individual electrode.

For example, vehicles such as EV (Electric Vehicle) and PHV (Plug in Hybrid Vehicle) are equipped with a power storage device for storing electric power used by a motor as a drive source. As such a power storage device, a secondary battery such as a lithium ion secondary battery or a nickel hydrogen secondary battery is known. The secondary battery includes an electrode assembly in which positive electrode and negative electrode electrodes having an active material layer are stacked in a layered manner. The structure of the electrode assembly includes a winding type in which long positive electrode and negative electrode of a certain length are wound up in a tubular shape in a superposed state, and a large number of positive electrode and negative electrode electrodes having a substantially rectangular shape are alternately arranged. The laminated type is known. For example, an electrode of a lithium ion secondary battery or the like is often configured to have a metal foil as a current collector and an active material layer on the surface of the metal foil.

As an apparatus used in the manufacturing process of a rectangular electrode, there is a rotary die cutter that cuts out a predetermined rectangular electrode by cutting a strip-shaped electrode material. The electrode material includes a coating portion formed by applying an active material mixture to a long metal foil which is a band-shaped current collector. Then, by passing the electrode material between the die roll and the anvil roll of the rotary die cutter, the electrode material is pushed off by the blade mold of the die roll, and the electrode is cut out.

As a rotary die cutter, a combination of a die roll and an anvil roll provided with a cushioning material is well known, but there is also a rotary die cutter in which a cushioning material made of sponge is attached to the surface of the die roll (for example, patent documents). 1). In Patent Document 1, the cushion material is gradually compressed as the blade mold approaches the electrode material. Then, after the electrode material is cut, the elastic force of the cushioning material acting toward the anvil roll makes it easier for the individual electrodes to be separated from the electrode material.

When the electrode material is cut using a die roll, for example, active material particles fall off from the coated portion or small pieces of metal leaf are peeled off to generate foreign matter. When such a foreign substance is separated from the electrode material when the blade mold penetrates the electrode material, a part of the foreign substance adheres to the anvil roll. In addition, when the individual electrodes are separated, if foreign matter is separated from the electrode material or the cut surface of the electrode, a part of the foreign matter may fall to the floor surface, or the individual electrode to be sent to the next process. , Adheres to the transport device that transports the electrodes. If these foreign substances are mixed during the lamination of the individual electrodes, they contribute to a short circuit inside the electrode assembly. Therefore, it is possible to remove the foreign substances adhering to the electrodes by means such as air blow before the lamination. Was known.

Japanese Unexamined Patent Publication No. 2001-93515

By the way, as in Patent Document 1, when a die roll having a cushioning material is used, foreign matter may further intervene between the coated portion of the electrode material before cutting and the blade mold of the die roll, which hinders good cutting. there were. It was suspected that foreign matter was mixed in from the previous process, but when the die roll was observed, it was found that the foreign matter was caused by cutting by the die roll. This foreign matter is a part of the foreign matter that has sunk into the cushion material of the die roll, and does not separate from the cushion material immediately after the cushion material is decompressed, but is gradually pushed out. It is a foreign substance that has fallen on the surface of the electrode material after rotating more than a degree. When this foreign matter is pressed against the surface of the coated portion by the blade mold of the die roll, for example, the shape of the electrodes around the foreign matter is distorted, which hinders good cutting.

An object of the present invention is to provide an electrode manufacturing apparatus suitable for removing foreign matter adhering to a cushion material of a die roll.

The electrode manufacturing apparatus for solving the above problems is an electrode manufacturing apparatus that cuts an electrode material provided with a coated portion of an active material mixture formed on the surface of a strip-shaped current collector into the shape of individual electrodes. A die roll having a blade shape on the peripheral surface, an anvil roll arranged to face the peripheral surface of the die roll, and an anvil roll mounted on the peripheral surface of the die roll, between the peripheral surface of the die roll and the anvil roll. It is a gist to include a cushion material made of sponge which is compressed and elastically deformed by the above and can project the blade mold, and a foreign matter removing device which is arranged to face the outer surface of the cushion material.

According to this, when the cushion material is pressed against the electrode material as the blade mold is pressed against the electrode material as the die roll rotates, the cushion material is compressed and the blade mold is pressed against the electrode material. It is pressed and the electrode material is cut. At the time of cutting, for example, active material particles may fall off from the coated portion, or small pieces of the current collector may peel off to generate foreign matter. When the cushioning material is compressed, the foreign matter enters the pores of the sponge and digs into the cushioning material. A part of this foreign matter separates from the cushion material immediately after the decompression of the cushion material and falls, but the other part does not separate immediately and is pushed out from the cushion material after the rotation of the die roll progresses. To separate. Therefore, the latter foreign matter can be removed from the cushion material at a position where the die roll is further rotated immediately after decompression by the foreign matter removing device, and an electrode manufacturing device suitable for removing foreign matter adhering to the cushioning material of the die roll is provided. it can.

Therefore, it is possible to prevent foreign matter adhering to the cushion material from falling on the surface of the coated portion before being subjected to cutting. Further, by using the foreign matter removing device, it is possible to prevent the foreign matter from being pushed into the cushion material again. As a result, the die roll blade mold can prevent foreign matter from being pressed against the surface of the coated portion, and good cutting of the electrode material is not hindered by the foreign matter.

Further, regarding the electrode manufacturing apparatus, it is preferable that the foreign matter removing apparatus is a non-contact type and is arranged on the upstream side of the cutting place of the electrode material by the blade mold in the transport direction of the electrode material.

According to this, even when a part of the foreign matter sunk into the cushion material is gradually pushed out, the foreign matter adhering to the cushion material can be removed on the upstream side of the cutting location in the transport direction. Most of the foreign matter is exposed from the cushion material, which makes it easy to remove. Further, since the foreign matter removing device arranged on the upstream side is a non-contact type, the exposed foreign matter is not pushed into the cushion material again.

Further, as for the electrode manufacturing apparatus, it is preferable that the foreign matter removing device has a suction port that faces the cushion material and opens, and sucks foreign matter together with air by an internal negative pressure.
According to this, the foreign matter removing device can peel off the foreign matter from the surface of the cushion material facing the opening, and can also suck and remove the foreign matter falling along the surface of the cushion material without leakage.

Further, regarding the electrode manufacturing apparatus, assuming that the direction along the plane direction of the electrode material and orthogonal to the longitudinal direction is the lateral direction, the dimensions of the foreign matter removing apparatus in the lateral direction of the electrode material are the cushioning material. It is preferable that the dimension is larger than the dimension in the lateral direction.

According to this, the foreign matter removing device can cover the entire range of the cushion material in the lateral direction, and the foreign matter can be removed from the entire range of the cushion material in the lateral direction.

According to the present invention, it is possible to provide an electrode manufacturing apparatus suitable for removing foreign matter adhering to a cushion material of a die roll.

The perspective view which shows typically the secondary battery. The perspective view which shows the electrode. The figure which shows the production equipment schematically. The perspective view which shows the electrode manufacturing apparatus. The plan view which shows the electrode manufacturing apparatus. The side view which shows the electrode manufacturing apparatus of another example.

Hereinafter, an embodiment in which the electrode manufacturing apparatus is embodied will be described with reference to FIGS. 1 to 5.
First, a secondary battery as a power storage device provided with electrodes will be described.
As shown in FIG. 1, the secondary battery 10 is a square battery having a square appearance. The secondary battery 10 is a lithium ion secondary battery. The secondary battery 10 includes an electrode assembly 11 in a case 12. The electrode assembly 11 is a laminated type in which a plurality of positive electrode electrodes and a plurality of negative electrode electrodes are alternately laminated in a state of being insulated from each other.

As shown in FIG. 2, the positive electrode and the negative electrode 13 have a rectangular shape, respectively. The electrode 13 is provided with an active material layer 15 on both sides of a rectangular metal foil (the positive electrode is an aluminum foil and the negative electrode is a copper foil) 14. The electrode 13 includes an uncoated portion 14a along one side of the metal leaf. The uncoated portion 14a is a portion where the active material layer 15 does not exist and the metal foil 14 is exposed. The uncoated portion 14a includes a tab 14b having a shape protruding from a part of one side of the metal foil 14.

Next, the electrode material 17, which is the material of the electrode 13, will be described.
As shown in FIG. 4, the electrode material 17 includes a long metal foil 18 as a band-shaped current collector and a coating portion 19 existing on both sides of the long metal foil 18. The long metal foil 18 is a portion of the electrode 13 that serves as the metal foil 14. Further, the coating portion 19 is a portion that becomes the active material layer 15 of the electrode 13. In the electrode material 17, the direction along the surface of the coated portion 19 and orthogonal to the longitudinal direction of the electrode material 17 is defined as the lateral direction Y. The electrode material 17 is both end edges in the lateral direction Y, and includes exposed portions 18a along both long edges along the longitudinal direction. Each exposed portion 18a is a portion of the long metal leaf 18 that is not covered by each coating portion 19, and is a portion where the long metal foil 18 is exposed. Each exposed portion 18a is a portion that becomes an uncoated portion 14a and a tab 14b when the electrode 13 is punched out from the electrode material 17.

Next, a method of manufacturing the electrode 13 will be described.
The electrode manufacturing method is associated with a coating step of continuously applying an active material mixture to the surface of a long metal foil 18 to form a coating portion 19 to form an electrode material 17, and a coating step. , The coating unit 19 is heated to evaporate the solvent contained in the active material mixture and to cure the binder. In the coating process, coating portions 19 are formed on both sides of the long metal foil 18, and exposed portions 18a of the long metal foil 18 are formed along a pair of long edges of the long metal foil 18. It is formed. Further, the electrode manufacturing method goes through a pressurizing step of compressing the coating portion 19 by pressurizing. The electrode manufacturing method involves a cutting step of cutting the electrode material 17 into the shape of the electrode 13. Then, the electrode 13 is cut out from the electrode material 17 in the cutting step.

Next, the production equipment 20 for the electrode 13 will be described. The production facility 20 is an apparatus that performs a cutting step on the electrode material 17 formed through the coating step including the drying step and the pressurizing step.

As shown in FIG. 3, the production facility 20 is a facility for performing a step of cutting the strip-shaped electrode material 17 to manufacture an electrode 13 having a predetermined shape.
The production facility 20 includes a supply unit 21 that supplies the electrode material 17. The supply unit 21 includes a holder 22 that supports the electrode material 17 wound in a roll shape. The holder 22 sends out the electrode material 17 according to the transport speed of the electrode material 17. The production equipment 20 includes a pair of columnar transport rolls 23 for transporting the electrode material 17 with the electrode material 17 interposed therebetween. The axis of the transport roll 23 extends along the lateral direction Y of the electrode material 17. The transport roll 23 is rotated around the axis by a drive device (not shown).

The production facility 20 includes an electrode manufacturing apparatus 30 on the downstream side of the transport roll 23 in the transport direction X of the electrode material 17 that has been sent out. The electrode manufacturing apparatus 30 includes a die roll 41, an anvil roll 45, a cushion material 44 mounted on the peripheral surface of the die roll 41, and a suction portion 46 as a foreign matter removing device.

As shown in FIG. 4, in the rotary die cutter 40 including the die roll 41 and the anvil roll 45, the axis of the die roll 41 and the axis of the anvil roll 45 extend along the lateral direction Y of the electrode material 17. And they are parallel to each other. The die roll 41 and the anvil roll 45 are supported by a drive device (not shown) so that they can rotate around the axis.

The die roll 41 includes a columnar roll body 42 and a blade type 43 having a shape protruding outward in the radial direction of the roll body 42. The blade mold 43 moves as the roll body 42 rotates. The blade mold 43 has a closed ring shape that matches the outer line of the electrode 13.

The cushion material 44 is made of, for example, a sponge. The cushion material 44 is attached so as to cover all the peripheral surfaces of the die roll 41 except the blade mold 43. The cutting edge of the blade mold 43 slightly protrudes from the tip of the cushion material 44. The cushion material 44 is compressed and elastically deformed between the die roll 41 and the anvil roll 45, and the blade mold 43 is projected from the outer peripheral surface of the cushion material 44.

Specifically, as shown in FIG. 3, as the blade mold 43 approaches the place closest to the anvil roll 45, the cushion material 44 is gradually compressed and elastically deformed, and the blade mold 43 becomes the anvil roll 45. The cushioning material 44 is most compressed at the location closest to. At this time, the blade mold 43 is in a state of being most protruding from the surface of the cushion material 44.

The blade mold 43 protruding from the outer peripheral surface of the cushion material 44 is pressed against the coating portion 19 of the electrode material 17, and cuts the upper coating portion 19, the long metal foil 18, and the lower coating portion 19. .. The electrode material 17 is cut at the place where the blade mold 43 is closest to the anvil roll 45 and where the cushion material 44 is most compressed. Hereinafter, the place where the blade mold 43 is closest to the anvil roll 45 is referred to as the cutting place P. Further, in the die roll 41, when the intersection with the straight line L extending vertically from the cutting place P is R, the cutting place P is from the cutting place P to the intersection R along the rotation direction of the die roll 41, that is, the position rotated by 180 degrees. The downstream side is defined as the upstream side from the cutting location P from the intersection R rotated by 180 degrees to the cutting location P.

As the die roll 41 rotates while the electrode material 17 is transported in the transport direction X, the electrode material 17 is gradually cut along the transport direction X by the blade mold 43, and the individual electrodes 13 are separated from the electrode material 17. It is cut out. When the cushion material 44 is compressed and elastically deformed, a restoring force to the original shape is generated in the cushion material 44. After the individual electrode 13 is cut from the electrode material 17, the individual electrode 13 is separated from the electrode material 17 by the restoring force of the cushion material 44 acting toward the anvil roll 45 to the original shape as the compression is released. It becomes easy to get rid of.

As shown in FIG. 3 or 5, the suction portion 46 included in the electrode manufacturing apparatus 30 is on the upstream side of the die roll 41 in the transport direction X of the electrode material 17. The suction portion 46 is arranged on the upstream side of the cutting location P in the rotation direction of the die roll 41 among the positions on the outer peripheral surface of the cushion material 44. The suction unit 46 has an elongated pipe shape, is connected to a negative pressure source (for example, a vacuum pump) (not shown), and sucks foreign matter or the like from the suction port 46a. The suction port 46a faces the outer peripheral surface of the cushion material 44 and opens. Then, the suction unit 46 sucks the foreign matter together with the air due to the negative pressure inside the suction unit 46.

Therefore, the suction unit 46 is a non-contact method for removing foreign matter and the like in a non-contact state with respect to the outer peripheral surface of the cushion material 44. The non-contact suction unit 46 is a method of generating a suction force to remove foreign matter from the cushion material 44, and in the present embodiment, the suction force is generated by a negative pressure source.

In the suction portion 46, the direction parallel to the lateral direction Y of the electrode material 17 is the longitudinal direction, and in the cushion material 44, the direction parallel to the lateral direction Y of the electrode material 17 is the longitudinal direction. The dimension of the suction port 46a in the longitudinal direction of the suction portion 46 is longer than the dimension in the longitudinal direction of the cushion material 44. Both ends of the suction port 46a are located beyond both ends of the cushion material 44 in the lateral direction Y. Therefore, the suction port 46a is open toward the entire longitudinal direction of the cushion material 44.

The production facility 20 also includes a suction unit 47 on the downstream side of the rotary die cutter 40 in the transport direction X. The suction unit 47 has an elongated pipe shape and is connected to a negative pressure source common to the suction unit 46, and sucks foreign matter and the like from the suction port 47a. In the suction portion 47, the direction parallel to the lateral direction Y of the electrode material 17 is defined as the longitudinal direction. The dimension of the suction port 47a in the longitudinal direction of the suction portion 47 is longer than the dimension in the longitudinal direction of the electrode material 17. Both ends of the suction port 47a are located beyond both ends of the electrode material 17 in the lateral direction Y. Therefore, the suction port 47a is open toward the entire lateral direction Y of the electrode material 17.

As shown in FIG. 3, the production facility 20 includes a guide device 50 on the downstream side of the suction unit 47 in the transport direction X. The guide device 50 guides the cut electrode 13 in the transport direction D1, while guiding the end material 54, which is a portion different from the portion cut out as the electrode 13, in the transport direction D2 different from the transport direction D1.

The guide device 50 includes a columnar separation roller 51, a guide roller 52, and a take-up reel 53. The axial centers of the separation roller 51 and the guide roller 52 extend along the lateral direction Y of the electrode material 17. The separation roller 51 is supported by a drive device (not shown) so that it can rotate around the axis, and the guide roller 52 is supported by a drive device (not shown) so that it can rotate around the axis. Further, the take-up reel 53 is supported by a drive device (not shown) so that it can rotate around the axis.

The separation roller 51 guides the cut-out electrode 13 in the transport direction D1. The transport direction D1 coincides with the transport direction X of the electrode material 17. On the other hand, the separation roller 51 and the guide roller 52 guide the end material 54 from which the electrode 13 is separated in the transport direction D2. Further, the guide roller 52 exerts tension on the end material 54 guided in the transport direction D2. The take-up reel 53 winds up the end material 54 guided in the transport direction D2.

The production equipment 20 includes an electrode transfer device 60. The electrode transfer device 60 conveys the electrode 13 guided by the guide device 50 to the transfer destination.
Next, a method of manufacturing the electrode 13 by the production equipment 20 including the electrode manufacturing apparatus 30 will be described.

The electrode material 17 supplied from the supply unit 21 passes between the die roll 41 and the anvil roll 45 in a state where a common negative pressure source is driven by both suction units 46 and 47 and a suction force is generated. ..

As shown in FIG. 3 or 4, the die roll 41 rotates while the electrode material 17 is being transported in the transport direction X, so that the electrode material 17 is gradually cut along the transport direction X by the blade mold 43. A piece of electrode 13 is cut out from the electrode material 17. Further, as the rotation of the die roll 41 progresses, the cushion material 44 is gradually compressed toward the cutting place P, and is most compressed at the cutting place P. The rotation of the die roll 41 progresses, and the compression of the cushion material 44 is released as the distance from the cutting location P increases.

When the electrode material 17 is cut, the active material may fall off from the coating portion 19 at the cutting location P, or a small piece of the long metal foil 18 may peel off to generate a foreign substance Z. When the cushion material 44 made of sponge is compressed, the generated foreign matter Z penetrates into the pores of the cushion material 44 and adheres to the cushion material 44. A part of the foreign matter Z sunk into the cushion material 44 near the cutting place P separates from the cushion material 44 immediately after the decompression of the cushion material 44 and falls, but the other part does not separate immediately and is a die roll. After the rotation of 41 has progressed, it is pushed out from the cushion material 44. The foreign matter Z extruded from the cushion material 44 after the die roll 41 is rotated 180 degrees or more from the cutting location P and is decompressed is sucked from the suction port 46a at a position facing the suction port 46a of the suction unit 46, and the cushion material 44 is sucked. Is removed from.

Immediately after adhering to the cushion material 44, the foreign matter Z that has fallen onto the electrode 13 after cutting is sucked from the suction port 47a of the suction portion 47 and removed from the surface of the electrode 13.
After that, when the end of the electrode 13 on the downstream side in the transport direction D1 rides on the electrode transport device 60, the electrode 13 is pulled by the electrode transport device 60 and transfers to the electrode transport device 60. On the other hand, the scrap material 54 left after the electrode 13 is cut out from the electrode material 17 is guided in the transport direction D2 by the separation roller 51.

According to the above embodiment, the following effects can be obtained.
(1) The electrode manufacturing apparatus 30 includes a suction portion 46 arranged to face the cushion material 44 that covers the surface of the die roll 41. When the electrode material 17 is cut by the blade mold 43 of the die roll 41, foreign matter Z is generated, and when the foreign matter Z sinks into the cushion material 44, even if the compression of the cushion material 44 is released, the foreign matter Z immediately becomes the cushion material. It may not be exposed on the surface of 44 and may not separate. In this way, the foreign matter Z that does not separate immediately after the cushion material 44 is decompressed can also be sucked by the suction unit 46 at the position where the die roll 41 is rotated and removed from the cushion material 44. Therefore, it is possible to prevent the foreign matter Z adhering to the cushion material 44 from falling onto the electrode material 17 before cutting. As a result, it is possible to prevent the foreign matter Z that has fallen from the cushion material 44 from being pressed against the coating portion 19 by the blade mold 43 of the die roll 41 to cause distortion, and the electrode material 17 can be cut satisfactorily. Therefore, it is possible to provide the electrode manufacturing apparatus 30 suitable for removing the foreign matter Z adhering to the cushion material 44 of the die roll 41.

(2) In the rotary die cutter 40, in order to weaken the pressing force of the blade mold 43 against the electrode material 17 and to make it easier to separate the individual electrodes 13 from the electrode material 17, the cushion material 44 is placed on the surface of the die roll 41. Is installed. Since the cushion material 44 is made of sponge, foreign matter Z easily gets stuck in the pores of the sponge, and foreign matter Z easily adheres to the cushion material 44. However, since the foreign matter Z can be removed from the cushion material 44 by the suction portion 46, the foreign matter Z is suppressed from being pressed against the coating portion 19 by the blade mold 43 of the die roll 41 while exerting the function of the cushion material 44. it can.

(3) The suction portion 46 is arranged so as to be located upstream of the cutting location P in the transport direction X of the electrode material 17. Therefore, the foreign matter Z, which was not extruded immediately after the cushion material 44 was decompressed, was almost extruded to the surface of the cushion material 44 on the upstream side of the cutting location P, and was easily separated by the suction unit 46. Can be removed. As a result, in the electrode material 17, it is possible to prevent the foreign matter Z from falling immediately before the cutting location P, and to prevent the foreign matter Z from being pressed against the coating portion 19 at the time of cutting.

(4) The suction portion 46 is in non-contact with the outer peripheral surface of the cushion material 44. Therefore, the suction portion 46 does not come into contact with the foreign matter Z and is not pushed into the cushion material 44 again. Further, the suction unit 46 has a suction port 46a that faces the cushion material 44 and opens, and sucks the foreign matter Z together with the air by the internal negative pressure. Therefore, the suction unit 46 can peel off the foreign matter Z from the surface of the cushion material 44, and can also suck and remove the foreign matter Z falling along the surface of the cushion material 44 without leakage.

(5) The dimension of the suction port 46a in the longitudinal direction of the suction portion 46 is longer than the dimension in the longitudinal direction of the cushion material 44. The suction ports 46a at both ends of the suction portion 46 in the longitudinal direction are located beyond both ends of the cushion material 44. Therefore, the suction port 46a is open toward the entire longitudinal direction of the cushion material 44, and foreign matter Z can be removed from the entire range of the cushion material 44 in the longitudinal direction.

(6) The production equipment 20 also includes a suction portion 47 on the downstream side of the rotary die cutter 40 in the transport direction X of the electrode material 17. Then, the foreign matter Z separated from the cushion material 44 on the downstream side of the cutting location P can be removed by the suction portion 47.

(7) The suction portion 46 is arranged on the upstream side of the cutting location P in the rotation direction of the die roll 41. In the suction portion 46 arranged at this position, the suction port 46a is located at the position closest to the outer peripheral surface of the cushion material 44. Therefore, the cushion material 44 in a state of returning to the original shape after decompression faces the suction port 46a. As a result, even the foreign matter Z adhered in the compressed state at the cutting location P is extruded to the surface of the cushion material 44 as the die roll 41 rotates and the cushion material 44 returns to its original shape. Since the suction unit 46 is closest to the outer peripheral surface of the cushion material 44 that has been restored after decompression, the foreign matter Z extruded near the outer peripheral surface can be efficiently sucked and removed from the cushion material 44.

The above embodiment may be changed as follows.
○ In the embodiment, the dimension of the suction port 46a in the longitudinal direction of the suction portion 46 is longer than the dimension of the suction port 46a in the longitudinal direction of the cushion material 44, but the dimension of the suction port 46a in the longitudinal direction of the suction portion 46 is the cushion. It may be the same as the longitudinal dimension of the material 44. Further, the shape of the suction port 46a is not limited to the elongated hole shape as described in the embodiment, and may be formed by a large number of small holes.

○ The foreign matter removing device is not limited to the use of air, and may be, for example, a method of charging the foreign matter Z and then generating a suction force by an electric field to suck the foreign matter, and is not particularly limited as long as it is a non-contact method. ..

○ As shown in FIG. 6, the foreign matter removing device includes a brush 48, which is a contact-type foreign matter removing device for scraping out foreign matter Z adhering to the cushion material 44, and a suction unit 46 for sucking the scraped foreign matter Z. It may have been done.

○ The foreign matter removing device is not limited to the suction units 46 and 47 connected to a common negative pressure source, and an independent suction device may be arranged individually.
The suction unit 46 may be arranged on the downstream side of the cutting location P in the transport direction X of the electrode material 17.

A plurality of suction portions 46 may be arranged side by side along the lateral direction Y of the electrode material 17.
○ A plurality of suction portions 46 may be arranged side by side in the circumferential direction of the die roll 41.
○ The cushion material 44 does not have to cover all the peripheral surfaces of the die roll 41 other than the blade mold 43, and may cover only the portion along the blade mold 43, for example.

○ The electrode material 17 may have a coating portion 19 on one side of the long metal foil 18, and in this case, the electrode 13 has an active material layer 15 on one side of the metal foil 14.
○ The electrode material 17 may be one in which the coating portion 19 is intermittently formed along the longitudinal direction.

○ The band-shaped current collector does not have to be a metal foil, but may be a sheet-shaped woven fabric or a non-woven fabric, as long as the coated portion 19 can be formed and the active material layer 15 can be provided on the electrode 13.
O The electrode manufacturing apparatus 30 of the embodiment may be adopted at the time of manufacturing an electrode used for a power storage device such as a nickel hydrogen secondary battery or an electric double layer capacitor.

Y ... Short direction, 13 ... Electrode, 17 ... Electrode material, 18 ... Long metal foil as a strip-shaped current collector, 19 ... Coating part, 30 ... Electrode manufacturing equipment, 41 ... Die roll, 43 ... Blade type, 44 ... Cushion material, 45 ... Anvil roll, 46 ... Suction part as a foreign matter removing device, 46a ... Suction port.

Claims (3)

An electrode manufacturing device that cuts an electrode material having an active material mixture coating portion formed on the surface of a strip-shaped current collector into the shape of individual electrodes.
A die roll with a blade type on the peripheral surface and
Anvil rolls arranged to face the peripheral surface of the die roll and
A sponge cushioning material that is attached to the peripheral surface of the die roll and is compressed and elastically deformed between the peripheral surface of the die roll and the anvil roll to project the blade mold.
A foreign matter removing device arranged to face the outer surface of the cushion material is provided.
The foreign matter removing device includes a brush, which is a contact-type foreign matter removing device that scrapes out foreign matter adhering to the cushion material, and a suction unit, which is a non-contact type foreign matter removing device that sucks the scraped out foreign matter. Cushion
The place where the blade mold was closest to the anvil roll and the place where the cushioning material was most compressed was used as the cutting place of the electrode material by the blade mold, and the die roll was rotated 180 degrees from the cutting place. Assuming that the position is on the downstream side and the position rotated by 180 degrees to the cutting place of the electrode material is on the upstream side, the brush is arranged on the downstream side of the cutting place of the electrode material, and the suction portion is An electrode manufacturing apparatus comprising a suction port that opens toward the cushion material, and the suction port is arranged on the upstream side of a cutting location of the electrode material. The suction unit, the electrode manufacturing apparatus according to claim 1 for sucking foreign substances together with air by the negative pressure of the inner portion. Assuming that the direction along the plane direction of the electrode material and orthogonal to the longitudinal direction is the lateral direction,
The axes of the die roll and the anvil roll extend along the lateral direction, and the suction port is open along the lateral direction, and the dimension of the suction port in the lateral direction is the cushion. The electrode manufacturing apparatus according to claim 1 or 2, which is larger than the dimension of the material in the lateral direction.

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