JP2015225745A - Electrode processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode processing device capable of suppressing the scattering of cutting powder with a simple configuration, while understanding the deterioration state of the cut.SOLUTION: In an electrode processing device 1, an adhesive part 50 is arranged below the cutting position B on the opposite side of an air blowing section 30 while holding an electrode body S therebetween. Since air is blown from above the side of the electrode body S to the cutting powder produced at the cutting position B, and the cutting powder adheres to the adhesive part 50 below the cutting position B, scattering of the cutting powder can be suppressed with a simple configuration. Deterioration state of the cut 10 can be understood, by confirming the adhesion amount or adhesion state of the cutting powder adhering to the adhesive part 50.

Description

  The present invention relates to an electrode processing apparatus.

  For example, a power storage device such as a lithium ion secondary battery is configured by housing an electrode assembly in which a positive electrode and a negative electrode are stacked via a separator together with an electrolyte in a case. The step of forming these electrodes (positive electrode and negative electrode) includes, for example, a step of cutting a foil-like electrode body into a desired shape. As an apparatus used for cutting out an electrode, for example, there is an electrode processing apparatus that cuts a part of an electrode body transported by a transport means along a transport direction.

  For example, the apparatus described in Patent Document 1 includes a cutting processing unit that performs edge trimming of steel strip, a suction nozzle that sucks iron powder generated during trimming, and a blowout nozzle that blows air toward the suction port of the suction nozzle. ing. In this apparatus, the iron powder generated at the time of trimming is collected at the suction port, thereby suppressing the scattering of the iron powder.

JP 2005-81456 A

  In the electrode processing apparatus as described above, the removal of cutting powder is promoted by forming an air flow from the cutting portion toward the exhaust port. However, it is necessary to improve the suction performance in order to ensure the cutting powder removal performance, which causes an increase in the size of the electrode processing apparatus.

  In addition, it is conceivable that the cut portion deteriorates by repeatedly cutting the electrode body. When the electrode body is cut at the cutting portion where the deterioration has progressed, burrs may occur on the cut end surface of the electrode body. In addition, there is a risk of increasing the scattering of the cutting powder, and it is important in the process to grasp the deterioration state of the cut portion.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an electrode processing apparatus that can suppress the scattering of cutting powder with a simple configuration and can grasp the deterioration state of a cutting portion. To do.

  In order to solve the above-described problems, an electrode processing apparatus according to the present invention includes a cutting unit that cuts a part of a foil-like electrode body transported by a transport unit along a transport direction, and a cutting position of the electrode body by the cutting unit An air blowing portion that blows air from the upper side of the electrode body toward the upper side, and an adhesive portion that is disposed below the cutting position on the opposite side of the air blowing portion across the electrode body.

  In this electrode processing apparatus, the adhesive portion is disposed below the cutting position on the opposite side of the air blowing portion with the electrode body interposed therebetween. Thereby, since the cutting powder generated at the cutting position is blown to the air from the upper side of the electrode body and adheres to the adhesive portion below the cutting position, it is possible to suppress scattering of the cutting powder with a simple configuration. it can. By confirming the amount and state of attachment of the cutting powder adhering to the adhesive portion, the deterioration state of the cutting portion can be grasped.

  Moreover, the wall part in which the air spraying part and the adhesion part were provided may be each arrange | positioned on both sides of an electrode body on both sides of a cutting position. In this case, since air is blown from both sides of the electrode body, the cutting powder can be more reliably removed.

  Moreover, the box-type cover comprised including the wall part may be arrange | positioned so that a cutting position may be enclosed. In this case, scattering of the cut powder outside the box can be suppressed by surrounding the cutting portion with the box-type cover. In addition, the air blowing unit can reliably blow air toward the cutting position without being affected by the air flow from the outside.

  Moreover, the exhaust part which exhausts the air in a box-type cover may be arrange | positioned in the wall part below the cutting position. In this case, since an air flow from the upper side to the lower side of the cutting position can be formed in the box, the air flows toward the adhesive portion. Therefore, cutting powder can be more reliably attached to the adhesive part.

  According to the electrode processing apparatus according to the present invention, it is possible to suppress the scattering of the cutting powder with a simple configuration and to grasp the deterioration state of the cutting portion.

It is a mimetic diagram showing one embodiment of an electrode processing device concerning the present invention. It is the II-II sectional view taken on the line in FIG. It is a schematic diagram which shows the modification of the electrode processing apparatus which concerns on this invention. It is the IV-IV sectional view taken on the line in FIG.

  Hereinafter, preferred embodiments of an electrode processing apparatus according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view showing an embodiment of an electrode processing apparatus according to the present invention. 2 is a cross-sectional view taken along line II-II in FIG. An electrode processing apparatus 1 shown in FIGS. 1 and 2 is an apparatus that cuts out (processes) an electrode that is a constituent element of a power storage device (for example, a lithium ion secondary battery). An electrode is formed through the process of cutting the foil-shaped electrode body S into a desired shape by the electrode processing apparatus 1. The electrode body S is formed by intermittently forming an active material layer S2 on both surfaces of a metal foil S1, for example, and is wound in a roll shape. In FIG. 1, a part of the active material layer S2 is omitted for convenience. The electrode body S is conveyed to the electrode processing apparatus 1 while being unwound by a conveying means (not shown), and is cut out into a desired shape by the electrode processing apparatus 1.

  As shown in FIGS. 1 and 2, the electrode processing apparatus 1 includes, for example, a cutting part 10, a box-type cover 20, an air blowing part 30, an exhaust part 40, and an adhesive part 50.

  The cutting unit 10 cuts a part of the transported electrode body S along the transport direction A. The cutting part 10 has an upper blade part 11 and a lower blade part 12. The upper blade portion 11 is disposed on the upper surface side of the electrode body S to be transported, and the lower blade portion 12 is disposed on the lower surface side of the electrode body S to be transported.

  The upper blade portion 11 has an upper blade 11a having a substantially disc shape and a roller 11b to which the upper blade 11a is fixed. The lower blade portion 12 includes a lower blade 12a having a substantially disc shape, and a roller 12b to which the lower blade 12a is fixed. The upper blade 11a and the lower blade 12a are disposed adjacent to each other so as to cut the electrode body S at the cutting position B. Each roller 11b, 12b is connected to a drive source (not shown), and rotates in synchronization with the applied driving force. The upper blade 11a and the lower blade 12a are preferably arranged so as to be substantially parallel to the conveying direction A when viewed from above (that is, the rotation axes of the upper blade 11a and the lower blade 12a are viewed from above). Sometimes orthogonal to the transport direction A).

  The box-type cover 20 is a hollow cover having a substantially rectangular parallelepiped shape, for example, and includes a pair of wall portions 21. The box-type cover 20 is disposed so as to surround the cutting position B (cutting part 10).

  The wall portions 21 are disposed on both sides of the electrode body S with the cutting position B interposed therebetween. A plurality of air blowing ports 22 and air exhaust ports 23 having, for example, a circular shape are formed in the wall portion 21. The air blowing ports 22 are formed in a matrix shape above the cutting position B, and the air exhaust ports 23 are formed below the cutting position B. An electrode body inlet 26 having, for example, a rectangular shape is formed in the front wall portion 24 disposed at a position orthogonal to the wall portion 21. An electrode body outlet 27 having a rectangular shape, for example, is formed in the rear wall portion 25 disposed at a position facing the front wall portion 24. The electrode body inlet 26 and the electrode body outlet 27 are formed so as to face each other.

  The air blowing unit 30 includes, for example, a blowing duct 31 and an air tube 32. The blowing duct 31 is fixed to the outside of the wall portion 21, and distributes the air supplied from the air tube 32 corresponding to the air blowing port 22 into the box-type cover 20.

  The exhaust unit 40 includes, for example, an exhaust duct 41 and an air tube 42. The exhaust duct 41 is fixed to the outside of the wall portion 21 and exhausts the air flowing through the box-type cover 20 corresponding to the air exhaust port 23 to the outside through the air tube 42.

  The adhesive portions 50 are respectively disposed below the cutting position B inside the wall portion 21. That is, the adhesion part 50 is arrange | positioned below the cutting position B on the opposite side of the air spraying part 30 on both sides of the electrode body S. The adhesion part 50 is comprised from the sheet | seat material which makes a rectangular shape, for example. On the surface of the adhesive portion 50, an adhesive surface 51 is formed to which cutting powder generated when the electrode body S is cut is attached. Examples of the material for forming the adhesive surface 51 include urethane adhesives. In the adhesive part 50, a position corresponding to the air exhaust port 23 is circularly opened so as not to cover the air exhaust port 23.

  The electrode processing apparatus 1 cuts out the electrode body S as follows. First, the electrode body S wound in a roll shape is supplied into the box-shaped cover 20 through the electrode body inlet 26 by the conveying means while being unwound. Then, the center part (part which passes the cutting position B) of the electrode body S conveyed in the box-type cover 20 is cut | disconnected along the conveyance direction A by the upper blade 11a and the lower blade 12a. The electrode body S divided into two is discharged out of the box-type cover 20 through the electrode body outlet 27. One of the divided electrode bodies S is conveyed upward and wound in a roll shape, and the other of the divided electrode bodies S is conveyed downward and wound in a roll shape.

  When the electrode body S is cut, as shown in FIG. 2, air is blown toward the cutting position B from the upper side on both sides of the electrode body S through the air blowing port 22. As a result, the cutting powder generated at the time of cutting the electrode body S is blown off with air and adheres to the adhesive surface 51 of the adhesive portion 50. For example, in FIG. 2, the cutting powder sprayed from the air blowing port 22 located on the left side adheres to the adhesive surface 51 of the adhesive part 50 located on the right side, and is cut from the air blowing port 22 located on the right side. The powder adheres to the adhesive surface 51 of the adhesive part 50 located on the left side.

  As described above, in the electrode processing apparatus 1, the adhesive portion 50 is disposed below the cutting position B on the opposite side of the air blowing portion 30 with the electrode body S interposed therebetween. As a result, the cutting powder generated at the cutting position B is blown to the air from the upper side of the electrode body S and adheres to the adhesive surface 51 of the adhesive part 50 below the cutting position B. Powder scattering can be suppressed. Moreover, the deterioration state of the cutting part 10 can be grasped | ascertained by confirming the adhesion amount or adhesion state of the cutting powder adhering to the adhesive surface 51. As a method for determining the deterioration state, for example, when the ratio of the adhesion area of the cutting powder to the surface area of the adhesive surface 51 exceeds a predetermined value, or when the shape of the adhering cutting powder is different from normal (a large burr has occurred. In some cases, the deterioration state is determined.

  Moreover, in the electrode processing apparatus 1, the wall part 21 in which the air spraying part 30 and the adhesion part 50 were provided is arrange | positioned on both sides of the electrode body S on both sides of the cutting position B, respectively. In this case, since air is blown from both sides of the electrode body S, the cutting powder can be more reliably removed.

  In the electrode processing apparatus 1, the box cover 20 including the wall portion 21 is disposed so as to surround the cutting position B. In this case, the cutting powder 10 can be prevented from being scattered outside the box by surrounding the cutting portion 10 with the box-shaped cover 20. Further, the air blowing unit 30 can reliably blow air toward the cutting position B without being affected by the air flow from the outside.

  In the electrode processing apparatus 1, an exhaust part 40 that exhausts the air in the box-type cover 20 is disposed below the cutting position B on the wall part 21. In this case, since the air flow from the upper side to the lower side of the cutting position B can be formed in the box, the air flows toward the adhesive portion 50. Therefore, cutting powder can be more reliably attached to the adhesive part 50.

  The present invention is not limited to the above embodiment. In the embodiment described above, the cutting position B is one, but a plurality of cutting positions B may be provided as in the electrode processing apparatus 100 shown in FIGS. 3 and 4, for example. FIG. 3 is a schematic view showing a modification of the electrode processing apparatus according to the present invention. 4 is a cross-sectional view taken along line IV-IV in FIG. In this modification, the cutting part 10 differs from the said embodiment by the point which has the two upper blades 11a and the lower blades 12a. The two upper blades 11a and the lower blades 12a are fixed to both end sides of the rollers 11b and 12b, respectively.

  Since this electrode processing apparatus 100 has two upper blades 11a and lower blades 12a, the edge portions on both sides of the electrode body S can be cut. Further, since there are two cutting positions B, one air blowing part 30 blows air to one cutting position B via the air blowing opening 22, and the other air blowing part 30 passes through the air blowing opening 22. Then, air can be blown to the other cutting position B. For example, in FIG. 4, the air blowing port 22 located on the left side blows air to the cutting position B located on the right side, and the air blowing port 22 located on the right side blows air to the cutting position B located on the right side. Also good. That is, the electrode processing apparatus 100 may be configured to blow air to the cutting position B on the far side. Moreover, it is good also as a structure by which air is sprayed intensively with respect to one cutting position B from both each air spraying part 30. FIG.

  Moreover, in the said embodiment, although the air spraying part 30 and the adhesion part 50 are provided in each wall part 21, only the air spraying part 30 is provided in one wall part 21, and the adhesion part is provided in the other wall part 21 You may provide only. That is, as long as the adhesion part 50 is arrange | positioned below the cutting position B on the opposite side of the air spraying part 30, what kind of form may be sufficient.

  Moreover, in the said embodiment, although the box-type cover 20 is arrange | positioned, you may arrange | position only the wall part 21 without arrange | positioning the box-type cover 20. FIG. Moreover, you may support the air spraying part 30 and the adhesion part 50 by another support means, without arrange | positioning the box-type cover 20 and the wall part 21. FIG.

  Moreover, in the said embodiment, although the exhaust part 40 is arrange | positioned, it is good also as a simpler structure by not arrange | positioning the exhaust part 40. FIG.

  Moreover, the adhesion part 50 does not need to be a rectangular sheet material, and may be a circular or polygonal sheet. Moreover, the adhesion part 50 may be any size as long as it is disposed below the cutting position B on the opposite side of the air blowing part 30. Furthermore, the adhesive part 50 does not need to be a sheet material, for example, what applied the adhesive directly to the wall part 21 may be used.

DESCRIPTION OF SYMBOLS 10 ... Cutting part, 20 ... Box-type cover, 21 ... Wall part, 30 ... Air spraying part, 40 ... Exhaust part, 50 ... Adhesive part, B ... Cutting position, S ... Electrode body.

Claims (4)

A cutting part for cutting a part of the foil-like electrode body conveyed by the conveying means along the conveying direction;
An air blowing section for blowing air from above the side of the electrode body toward the cutting position of the electrode body by the cutting section;
An electrode processing apparatus comprising: an adhesive portion disposed below the cutting position on the opposite side of the air blowing portion with the electrode body interposed therebetween.   The electrode processing apparatus according to claim 1, wherein wall portions provided with the air blowing portion and the adhesive portion are respectively disposed on both sides of the electrode body with the cutting position interposed therebetween.   The electrode processing apparatus according to claim 2, wherein a box-type cover configured to include the wall portion is disposed so as to surround the cutting position.   The electrode processing apparatus according to claim 3, wherein an exhaust portion for exhausting air in the box-type cover is disposed below the cutting position on the wall portion.

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