Energy storage device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-2021194007-A1
Application number	US-201716076043-A
Country	US
Kind code	A1
Filing date	Feb 8, 2017
Priority date	Feb 10, 2016
Publication date	Jun 24, 2021
Grant date	—

Abstract

An energy storage device (10) includes: an electrode assembly (400) which includes a positive electrode plate (410) and a negative electrode plate (420), wherein the positive electrode plate (410) includes: a positive electrode substrate (411) which is electrically conductive; a positive electrode composite layer (414) which is formed on the positive electrode substrate (411), and an insulating layer (415), at least a part of the insulating layer being continuously formed on the positive electrode substrate (411) and an edge portion (414a) which is a portion including an edge of the positive electrode composite layer (414), and wherein an uneven portion (415a) is formed in the insulating layer (415) above the edge portion (414a) of the positive electrode composite layer (414).

First claim

1 . An energy storage device comprising:
an electrode assembly which includes a positive electrode plate and a negative electrode plate, wherein the positive electrode plate or the negative electrode plate includes:
a substrate which is electrically conductive;
a composite layer which is formed on the substrate, and
an insulating layer, at least a part of the insulating layer being continuously formed on the substrate and an edge portion which is a portion including an edge of the composite layer, and
wherein an uneven portion is formed in the insulating layer above the edge portion of the composite layer.

2 . The energy storage device according to claim 1 , wherein the uneven portion of the insulating layer is formed by an uneven shape of the composite layer at the edge portion.

3 . The energy storage device according to claim 2 , wherein the composite layer includes a plurality of active material particles and a binder,
wherein the insulating layer includes a plurality of particles and a binder, and wherein an average particle diameter of the plurality of particles is smaller than an average particle diameter of the plurality of active material particles.

4 . The energy storage device according to claim 3 , wherein a ratio of the particle and the binder which are included in the insulating layer is between 80:20 and 95:5.

5 . A method for manufacturing the energy storage device according to claim 1 , the method comprising:
a light irradiation step in which a light is irradiated on the insulating layer in a direction which intersects a thickness direction of the insulating layer; and an identification step in which a position of the edge portion of the composite layer is identified by using a position of a shadow generated at the uneven portion by the light which is irradiated in the light irradiation step.

Assignees

• Gs Yuasa Int Ltd

Inventors

• Danno Hiroyuki

Classifications

• H01M10/058 Primary

  Construction or manufacture · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M4/02

  Electrodes composed of, or comprising, active material · CPC title

• H01M4/628 Primary

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title

• H01G11/28

  arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives · CPC title