Battery packaging material

Patent metadata

Field	Value
Publication number	US-2017274622-A1
Application number	US-201515512283-A
Country	US
Kind code	A1
Filing date	Aug 31, 2015
Priority date	Sep 26, 2014
Publication date	Sep 28, 2017
Grant date	—

Abstract

Battery packaging material wherein a sheet-like laminated body is formed by sequentially stacking at least a base layer, metal layer, and sealant layer, the battery packaging material being equipped with substantially rectangular space that is formed to protrude from the sealant layer side toward the base layer side, and accommodates a battery element on the sealant layer side. In planar view from the base layer side view, a first and second curved sections are provided from the center portion toward the battery packaging material end parts, in a cross section in the thickness direction on a line connecting opposing corner parts protruding in a substantially rectangular shape. The thickness (a) of the metal layer at the first curved section, (c) of the metal layer at the second curved section, and (b) of the metal layer at the section located between the first and second curved sections, satisfy the following relationship a≧b>c or a≧c>b.

First claim

1 . A battery packaging material comprising a sheet-shaped laminate including at least a base material layer, a metal layer and a sealant layer laminated in this order, wherein
the battery packaging material is formed so as to protrude from the sealant layer side to the base material layer side, and includes on the sealant layer side a substantially rectangular parallelepiped space which accommodates a battery element, the battery packaging material includes a first curved section and a second curved section in this order from a center portion to an end part of the battery packaging material in a cross-section in the thickness direction on a straight line connecting mutually opposed corners of a portion protruding in a substantially rectangular shape in plan view of the battery packaging material from the base material layer side, and a thickness a of the metal layer at the first curved section, a thickness c of the metal layer at the second curved section, and a thickness b of the metal layer at a section situated between the first curved section and the second curved section satisfy the following relationship:
a≧b>c or a≧c>b.

2 . The battery packaging material according to claim 1 , wherein a thickness of the metal layer at the center portion of the portion protruding in a substantially rectangular shape in plan view of the battery packaging material is less than 30 μm.

3 . The battery packaging material according to claim 1 , wherein the thickness a of the metal layer at the first curved section is less than 30 μm.

4 . The battery packaging material according to claim 1 , wherein the thickness b of the metal layer at the section situated between the first curved section and the second curved section is less than 30 μm.

5 . The battery packaging material according to claim 1 , wherein the thickness c of the metal layer at the second curved section is less than 30 μm.

6 . The battery packaging material according to claim 1 , wherein the metal layer is formed of an aluminum foil.

7 . The battery packaging material according to claim 1 , wherein an adhesive layer is laminated between the base material layer and the metal layer.

8 . A battery comprising a battery element which includes at least a positive electrode, a negative electrode and an electrolyte, the battery element being stored in the battery packaging material according to claim 1 .

Assignees

• Dainippon Printing Co Ltd

Inventors

• Amano Makoto
• Yamashita Rikiya
• Takahagi Atsuko

Classifications

• B32B2307/71

  Resistive to light or to UV · CPC title

• B32B27/325

  comprising polycycloolefins · CPC title

• B32B2250/05

  5 or more layers · CPC title

• B32B7/12 Primary

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B15/088

  comprising polyamides · CPC title