Press apparatus for electrode, electrode manufacturing apparatus, and electrode manufacturing method

Patent metadata

Field	Value
Publication number	US-9419269-B2
Application number	US-201213617239-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Sep 26, 2011
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

According to one embodiment, a press apparatus for an electrode, includes, a press unit configured to compress an electrode sheet includes a first region formed with an electrode layer on a surface thereof and a second region on which the electrode layer is not formed, and a stretching unit includes a stretching member, which comprises a projecting surface located opposite the electrode sheet and projecting toward the electrode sheet, in a position corresponding to the second region, a retracted surface retracted from the electrode sheet relative to the projecting surface, in a position corresponding to the first region, and a relief surface retracted away from the electrode sheet, in a position corresponding to an edge portion of the electrode sheet.

First claim

What is claimed is:

1. A press apparatus for an electrode, comprising:
a press unit configured to compress an electrode sheet comprising a first region formed with an electrode layer on a surface thereof and a second region on which the electrode layer is not formed; and
a stretching unit comprising a stretching member, which comprises a projecting surface located opposite the electrode sheet and projecting toward the electrode sheet, in a position corresponding to the second region, a retracted surface retracted from the electrode sheet relative to the projecting surface, in a position corresponding to the first region, and a relief surface retracted away from the electrode sheet, in a position corresponding to an edge portion of the electrode sheet, and configured to apply tension to the second region,
wherein the stretching member is a roller comprising a small-diameter portion, a large-diameter portion having a diameter larger than that of the small-diameter portion, and a relief portion having a diameter gradually reduced at a part distant from a boundary between the small-diameter and large-diameter portions on the side of the large-diameter portion,
outer peripheral surfaces of the small-diameter portion, the large-diameter portion, and the relief portion constitute the retracted surface, the projecting surface, and the relief surface, respectively,
the first region of the electrode sheet is located opposite the small-diameter portion, the second region of the electrode sheet is located opposite the large-diameter portion, a boundary between the first region and the second region of the electrode sheet is located nearer to the small-diameter portion than a step between the large-diameter portion and the small-diameter portion,
an outer peripheral surface of the small-diameter portion is out of contact with the first region, and an outer peripheral surface of the large-diameter portion is in contact with the second region from the boundary between the small-diameter and large-diameter portions to the relief surface.

2. The press apparatus for an electrode of claim 1 , wherein the relief portion is formed in a round shape with a curved cross-sectional profile.

3. A manufacturing apparatus for an electrode, comprising:
a press apparatus for an electrode comprising:
a press unit configured to compress an electrode sheet comprising a first region formed with an electrode layer on a surface thereof and a second region on which the electrode layer is not formed; and
a stretching unit comprising a stretching member, which comprises a projecting surface located opposite the electrode sheet and projecting toward the electrode sheet, in a position corresponding to the second region, a retracted surface retracted from the electrode sheet relative to the projecting surface, in a position corresponding to the first region, and a relief surface retracted away from the electrode sheet, in a position corresponding to an edge portion of the electrode sheet, and configured to apply tension to the second region,
wherein the stretching member is a roller comprising a small-diameter portion, a large-diameter portion having a diameter larger than that of the small-diameter portion, and a relief portion having a diameter gradually reduced at a part distant from a boundary between the small-diameter and large-diameter portions on the side of the large-diameter portion,
outer peripheral surfaces of the small-diameter portion, the large-diameter portion, and the relief portion constitute the retracted surface, the projecting surface, and the relief surface, respectively,
the first region of the electrode sheet is located opposite the small-diameter portion, the second region of the electrode sheet is located opposite the large-diameter portion, a boundary between the first region and the second region of the electrode sheet is located nearer to the small-diameter portion than a step between the large-diameter portion and the small-diameter portion,
an outer peripheral surface of the small-diameter portion is out of contact with the first region, and an outer peripheral surface of the large-diameter portion is in contact with the second region from the boundary between the small-diameter and large-diameter portions to the relief surface.

Assignees

• Uematsu Ikuo
• Nakahata Masaomi
• Toshiba Kk

Inventors

• Uematsu Ikuo
• Nakahata Masaomi

Classifications

• B30B3/04

  co-operating with one another, e.g. with co-operating cones · CPC title

• B30B3/005

  Roll constructions · CPC title

• H01M4/0435 Primary

  Rolling or calendering · CPC title

• B30B11/165

  Roll constructions · CPC title

• H01M4/0471 Primary

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title