JP2014161968A - Cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device that cuts a work without an influence of a hit mark occurring when cutting the work.SOLUTION: A cutting device 1 comprises: a carrying mechanism 2 that carries a long plate-like work 8 along a carrying route in a longitudinal direction L of the work 8; a cutting blade 15 that is provided on one surface of the work 8 on the carrying route and cuts the work in the width direction; a long plate-like protective sheet 18 that is provided on the other surface of the work 8 on the carrying route and holds the work 8 between the cutting blade 15 and the sheet; a receiving member 4 that supports the protective sheet 18 when cutting the work 8; and a guiding member 5 that guides the protective sheet 18 in a direction different from the carrying route of the work 8 on at least one side of front and back sides of the receiving member 4.

Description

  The present invention relates to a cutting device, and more particularly to a cutting device that cuts a long workpiece in the width direction of the workpiece.

  Conventionally, a battery cell has been used as a power source for various electric devices. A secondary battery, which is a battery cell that can be repeatedly charged and discharged, may be used as a power buffer for a power generator or the like in addition to a power source. As an example of the configuration of the battery cell, a configuration having a stacked body in which a positive electrode plate and a negative electrode plate are stacked with a separator interposed therebetween can be given. An electrode plate (a positive electrode plate or a negative electrode plate) is obtained by providing an electrode active material on the surface of a current collector.

  As an example of a method for manufacturing an electrode plate, a protective plate called a protective sheet is arranged below an electrode original plate (electrode strip) that is a workpiece, and a structure that suppresses damage to the apparatus when it is cut by punching the electrode original plate Is known (see, for example, Patent Document 1). As shown in FIG. 5, the conventional cutting device 101 has a structure in which the electrode original plate 8 is punched using a punching blade 103 called a Thomson blade, and the protective sheet 18 is disposed between the electrode original plate 8 and the device. . In this apparatus, the electrode original plate 8 is conveyed in one direction along the upper surface of the original plate support base 104 by the conveyance rollers 111 and 112, and the protective sheet 18 is fed in the same direction as the electrode original plate 8 by the conveyance rollers 119 and 120. It is configured to be.

JP 2012-074178 A

  However, in the above-described conventional technique, there may be a punching mark (a punching mark) that was created when the electrode plate 8 was previously punched at a position where the punching blade 103 hits on the protective sheet 18. When the electrode base plate 8 is punched out, the dents bite the active material on the electrode, so that the active material may be peeled off. In addition, the metal foil that becomes the substrate of the electrode is sandwiched between the dents, and when it is punched out, a metal whisker (metal piece) is generated, which may cause an internal short circuit in the battery.

  Thereby, the product yield of a battery cell or an electrode will become low, and it will become a cause which raises the manufacturing cost of a battery cell. Therefore, it is necessary to suppress the influence of this dent.

  The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a cutting apparatus capable of cutting a workpiece without being affected by a dent generated when the workpiece is cut. It is in.

In order to achieve the above object, the present invention provides the following means.
The cutting device according to the present invention is provided on the one surface side of the work on the transport path, a transport mechanism that transports the long plate-shaped work along the transport path in the longitudinal direction of the work, A cutting blade that cuts the workpiece in the width direction, a long plate-shaped protective sheet that is provided on the other surface side of the workpiece on the conveyance path and sandwiches the workpiece between the cutting blade, and the workpiece And a guide member that guides the protective sheet in a direction different from the conveyance path of the workpiece. The receiving member supports the protective sheet.

  According to the said structure, a workpiece | work can be cut | disconnected without receiving the influence of the dent which arises when cutting a workpiece | work by guiding a protection sheet in the direction different from the conveyance path | route of a workpiece | work.

  In the cutting apparatus, a feed mechanism for causing the protection sheet to travel in the longitudinal direction is provided, and the feed mechanism feeds the protection sheet with a feed amount smaller than a transport amount of the workpiece every time the cutting blade is cut. It is preferable.

  According to the above configuration, the consumption of the protective sheet can be reduced as compared with the case where the feeding amount of the protective sheet is equal to the conveyance amount of the workpiece.

  In the cutting apparatus, it is preferable that the guide member guides the protective sheet in a direction different from the conveyance path of the workpiece before and after the receiving member.

  According to the said structure, since the contact area of a workpiece | work and a protection sheet becomes small, reattachment of the chips etc. at the time of cut | disconnecting a workpiece | work can be prevented.

  In the cutting apparatus, the guide member may be configured to guide the protective sheet in a direction different from the conveyance path of the workpiece either before or after the receiving member.

  According to the said structure, since a workpiece | work is supported by the protective sheet guided in the same direction as a workpiece | work, the cutting | disconnection of a workpiece | work can be stabilized.

  In the cutting apparatus, it is preferable that the receiving member has a cylindrical shape, a center axis of which is a roller orthogonal to the longitudinal direction, and the cutting blade cuts a position where the receiving member and the workpiece are in contact with each other.

  According to the said structure, since the receiving member also fulfill | performs the function of the roller which sends a protection sheet, the structure of an apparatus can be simplified more.

  According to the present invention, since the protective sheet is guided in a direction different from the conveyance path of the workpiece, the workpiece can be cut without being affected by dents generated when the workpiece is cut.

It is a perspective view of the battery cell of embodiment of this invention. It is a perspective view explaining the outline of the electrode cutting device of embodiment of this invention. It is a side view of the electrode cutting device seen from the A direction of FIG. It is a side view which shows the modification of the electrode cutting device of embodiment of this invention. It is a side view of the conventional power-off device.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The electrode cutting device of this embodiment is a device that cuts out an electrode plate of a battery cell from a long plate-shaped electrode original plate that is a workpiece. First, a battery cell having this electrode plate will be described.

  As shown in FIG. 1, the battery cell 51 includes a battery container 52 that stores an electrolytic solution therein. The battery cell 51 is, for example, a lithium ion secondary battery. The application range of the present invention is not limited to the shape and material of the battery case. The battery container 52 of this example is a hollow container made of aluminum and has an outer shape of a substantially prismatic shape (substantially rectangular parallelepiped shape). The battery container 52 includes a container body 53 having an opening and a lid 54 that closes the opening and is joined to the container body 53.

  The lid 54 is provided with electrode terminals 55 and 56. For example, the electrode terminal 55 is a positive terminal and the electrode terminal 56 is a negative terminal. A plurality of electrode plates 57 and 58 and a plurality of separators 59 are accommodated in the battery container 52. For example, the electrode plate 57 is a positive electrode plate, and the electrode plate 58 is a negative electrode plate. The plurality of electrode plates 57 and 58 are repeatedly arranged so that the positive electrode plates and the negative electrode plates are alternately arranged.

  The separator 59 is disposed between the pair of electrode plates 57 and 58 so that the electrode plates 57 and 58 are not in direct contact with each other. The separator 59 is made of a porous insulating material or the like, and allows electrolytic components such as lithium ions to pass through. Actually, a plurality of positive plates, a plurality of negative plates, and a plurality of separators are laminated to form a laminate. The battery cell 51 has a structure in which the stacked body is accommodated in a battery container 52. The electrolytic solution is stored inside the battery container 52 so as to be in contact with the electrode plates 57 and 58.

Next, an electrode cutting device which is a cutting device for cutting the electrode plates 57 and 58 from the long electrode original plate in the manufacturing process of the battery cell 51 described above will be described.
As shown in FIGS. 2 and 3, the electrode cutting apparatus 1 of the present embodiment includes an electrode transport mechanism 2 (transport mechanism) having a master roll 10 around which a long (strip-shaped) electrode master 8 is wound, A cutting means 3 for cutting the electrode original plate 8 conveyed by the electrode conveying mechanism 2 to form an electrode plate 9; a receiving member 4 for supporting the electrode original plate 8 when the electrode original plate 8 is cut by the cutting means 3; A protective sheet feeding mechanism 17 that has the receiving member 4, has a guide member 5 that guides the protective sheet 18 that protects the receiving member 4, travels the protective sheet 18, and a control unit that controls the electrode cutting apparatus 1 (FIG. (Not shown).

  In the electrode cutting device 1, the electrode original plate 8 conveyed in the longitudinal direction L by the electrode conveying mechanism 2 is orthogonal to the longitudinal direction L of the electrode original plate 8 (hereinafter simply referred to as the longitudinal direction L) using the cutting means 3. This is an apparatus for forming an electrode plate 9 having a predetermined length by cutting in the width direction W. When cutting by the cutting means 3, the electrode original plate 8 is disposed between the cutting blade 15 of the cutting means 3 and the receiving member 4, and the receiving member is protected by the protective sheet 18.

  In the following description, a position where the conveyed electrode plate 8 is cut is referred to as a cutting position C. At the cutting position C, the electrode original plate 8 is conveyed in one direction along the longitudinal direction L of the electrode original plate 8. Hereinafter, the planar path of the electrode plate 8 at the cutting position C is referred to as a transport path R.

  The electrode transport mechanism 2 includes an original plate roll 10, a plurality of transport rollers 11 and 12, and a plurality of holding rollers 13 arranged before and after the cutting position C, and transports the electrode original plate 8 to the cutting position C. Device. The electrode original plate 8 is pulled out from the original plate roll 10 by the electrode conveying mechanism 2 and is conveyed to the cutting position C in a tensioned state.

  An electrode original plate 8 is wound around the original plate roll 10. The electrode base plate 8 is provided with an electrode active material on both surfaces of a base material of a current collector. Here, an electrode active material is provided in the formation region 22 of the electrode original plate 8, and one end portion in the width direction W of the electrode original plate 8 is a non-formation region 23 in which no electrode active material is provided.

  A conveyance roller consists of the cylindrical 1st conveyance roller 11 and the 2nd conveyance roller 12, and suspends and conveys the electrode original plate 8. FIG. The electrode original plate 8 drawn from the original plate roll 10 is applied with tension by the first transport roller 11 and changed in direction, and then applied with tension by the second transport roller 12 and changed in direction, and then the cutting position. Introduced into C.

The second transport roller 12 is a roller for applying tension to the electrode base plate 8 in the transport path R while transporting the electrode base plate 8 in cooperation with the holding roller 13. The first transport roller 11 is disposed at a position different from the extension line of the transport path R in order to apply tension to the electrode original plate 8.
The holding roller 13 is constituted by a pair of rollers that sandwich the electrode plate 8 from one surface side and the other surface side of the transport path R before and after the cutting position C. Although not shown, the holding roller 13 includes suction means for sucking the electrode original plate 8 cut from the downstream side in the transport direction in order to stably hold the electrode original plate 8.

  The cutting means 3 is provided on one surface side of the transport path R at the cutting position C, and a cutting blade 15 that cuts the electrode plate 8 in the width direction W, and a cutting blade drive that moves the cutting blade 15 in the width direction W. Device 16. The cutting blade 15 is a cutter that can cut the electrode original plate 8 by moving it in the width direction W of the electrode original plate 8, and for example, a round blade cutter can be adopted. Further, as the cutting means 3, a so-called Thomson blade that has a length in the width direction W and cuts the electrode original plate 8 by moving it in a direction orthogonal to the surface of the electrode original plate 8 can also be adopted.

  The protective sheet feeding mechanism 17 includes a receiving member 4 that receives the cutting blade 15, and is a mechanism that sends a protective sheet 18 that protects the receiving member 4. The guide member 5 includes a first guide member 19 and a second guide member 20. The receiving member 4 is a roller that can support the electrode original plate 8 from the other side of the transport path R when the cutting blade 15 of the cutting means 3 cuts the electrode original plate 8. That is, the receiving member 4 is disposed so that the longitudinal direction of the receiving member 4 is along the moving direction of the cutting blade 15.

The guide member 5 is a roller arranged so as to give tension to the protective sheet 18 before and after the receiving member 4. Here, the guide member 5 of the present embodiment includes a first guide member 19 that sends the protective sheet 18 to the receiving member 4 from a direction different from the conveying path R of the electrode original plate 8, and a direction different from the conveying path R from the receiving member 4. The second guide member 20 guides the protective sheet 18. In other words, the guide member 5 is not arranged to send the protection sheet 18 along the transport path R before and after the contact portion between the protection sheet 18 and the electrode original plate 8.
In other words, the first guide member 19 and the second guide member 20 constituting the guide member 5 are arranged offset with respect to the transport path R. Thereby, the electrode base plate 8 and the protective sheet 18 are linearly contacted at the cutting position C.

  Next, operation | movement of the electrode cutting device 1 of this embodiment is demonstrated. The control unit controls the electrode conveying mechanism 2 and the protective sheet feeding mechanism 17 to convey the electrode original plate 8 to the cutting position C and to supply the protective sheet 18 with a feeding operation. Next, the control unit conveys the electrode original plate 8 at a predetermined conveyance pitch corresponding to the length of the electrode plate 9 to be manufactured. Then, the control unit conveys the electrode original plate 8 at a predetermined conveyance pitch, temporarily stops conveyance of the electrode original plate 8, and cuts the electrode original plate 8 in the width direction W using the cutting means 3.

  On the other hand, the protective sheet 18 is fed at a predetermined feed pitch (feed width) every time the cutting operation is performed. The feeding direction is the same as the conveying direction of the electrode plate 8 at the cutting position C. The feed pitch is set so as to be as small as possible in a range in which punching marks (punching marks) formed on the protective sheet 18 in the cutting process do not affect the next cutting process. That is, the transport pitch of the electrode original plate 8 and the feed pitch of the protective sheet are not the same, and the feed pitch of the protective sheet 18 is made as small as possible. Through the steps as described above, a plurality of electrode plates 9 are cut out from the electrode original plate 8.

According to the above embodiment, the protective sheet 18 is guided in a direction different from the transport path R of the electrode original plate 8, so that the electrode original plate 8 is not affected by the dents generated when the electrode original plate 8 is cut. Can be cut.
In particular, the guide member 5 of the present embodiment guides the protective sheet 18 to the receiving member 4 from a direction different from the conveyance path R of the electrode original plate 8 and guides the protective sheet 18 from the receiving member 4 to a direction different from the conveyance path R. Therefore, since the contact area between the electrode original plate 8 and the protective sheet 18 is reduced, it is possible to prevent reattachment of chips and the like when the electrode original plate 8 is cut.

  In addition, by reducing the feed pitch of the protective sheet 18, it is possible to reduce the consumption of the protective sheet as compared with the case where the feed amount of the protective sheet 18 is equal to the transport amount of the electrode original plate 8. Thereby, the manufacturing cost of the electrode plate 9 can be reduced. Note that the feed pitch may be the same when the consumption of the protective sheet does not significantly affect the manufacturing cost.

  Moreover, since the receiving member 4 also functions as a roller for feeding the protective sheet 18, the configuration of the apparatus can be further simplified. In addition, when there is little necessity for the structure of an electrode conveyance mechanism, you may provide a receiving member and a roller separately.

Next, a modified example of the electrode cutting device of this embodiment will be described.
As shown in FIG. 4, the modified electrode cutting apparatus 1 </ b> B has a different arrangement of the second guide member 20, and is configured to guide the protective sheet 18 from the receiving member 4 in the same direction as the transport path R. That is, the protective sheet 18 and the electrode original plate 8 are configured to be in surface contact.

  According to the modified example, since the electrode original plate 8 is supported by the protective sheet 18 guided in the same direction as the electrode original plate 8, the cutting of the electrode original plate 8 can be stabilized.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the protective sheet 18 is sent in the same direction as the electrode original plate 8, but the present invention is not limited to this, and the feeding direction of the protective sheet 18 and the conveying direction of the electrode original plate 8 may be reversed. .
Moreover, the structure of a conveyance roller does not need to be the same as the structure demonstrated in the said embodiment, for example, you may abbreviate | omit the 1st conveyance roller 11. FIG.

1 Electrode cutting device (cutting device)
2 Electrode transport mechanism (transport mechanism)
3 Cutting means 4 Receiving member 5 Guide member 6 Control unit 8 Electrode original plate (workpiece)
DESCRIPTION OF SYMBOLS 9 Electrode plate 10 Original plate roll 11 1st conveyance roller 12 2nd conveyance roller 13 Holding roller 15 Cutting blade 16 Cutting blade drive device 17 Protective sheet feed mechanism 18 Protective sheet 19 First guide member 20 Second guide member C Cutting position R Conveyance Path W width direction

Claims (5)

A transport mechanism for transporting a long plate-shaped work along a transport path in the longitudinal direction of the work;
A cutting blade that is provided on one surface side of the workpiece on the conveyance path and cuts the workpiece in the width direction;
A long plate-like protective sheet that is provided on the other surface side of the workpiece on the conveyance path and sandwiches the workpiece between the cutting blade,
A receiving member that supports the protective sheet when cutting the workpiece;
A cutting device comprising: a guide member that guides the protective sheet in a direction different from a conveyance path of the workpiece at least one of the front and rear sides of the receiving member.   A feed mechanism that travels the protective sheet in the longitudinal direction is provided, and the feed mechanism feeds the protective sheet with a feed amount that is smaller than the transport amount of the workpiece every time the cutting blade performs a cutting operation. The cutting device according to claim 1.   The cutting apparatus according to claim 1 or 2, wherein the guide member guides the protective sheet in a direction different from a conveyance path of the workpiece before and after the receiving member.   The cutting according to any one of claims 1 to 3, wherein the guide member guides the protective sheet in a direction different from a conveyance path of the workpiece either before or after the receiving member. apparatus.   The said receiving member comprises a cylinder shape, the center axis | shaft is a roller orthogonal to the said longitudinal direction, and the said cutting blade cut | disconnects the position where the said receiving member and the said workpiece | work contact. Item 5. The cutting device according to any one of Items 4 to 6.

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