Pouch-type battery and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9859535-B2
Application number	US-201514864439-A
Country	US
Kind code	B2
Filing date	Sep 24, 2015
Priority date	Sep 30, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

There is provided a pouch-type battery that includes an exterior packaging member having an accommodating space in which an electrode and an electrolyte are accommodated and which has a curved shape at least in a first direction. The exterior packaging member includes a first film member on which a cup section having the accommodating space inside is provided, a second film member disposed to face the first film member, and a sealing section around the cup section, with which the first and second film members are bonded to each other and the accommodating space is sealed. A top surface of the cup section of the first film member has a curved shape and is provided with a plurality of concave portions or convex portions, and the sealing section has a curved shape in the first direction and is configured of a flat surface on which neither concave portion nor convex portion is provided.

First claim

What is claimed is:

1. A pouch-type battery comprising:
a sheet-shaped electrode;
an electrolyte; and
an exterior packaging member having an accommodating space in which the electrode and the electrolyte are accommodated,
wherein the exterior packaging member includes
a first film member on which a cup section having the accommodating space inside is provided,
a second film member disposed to face the first film member, the second film member not including concave portions or convex portions, and
a sealing section around the cup section, with which the first and second film members are bonded to each other and the accommodating space is sealed, and

wherein the cup section of the first film member has a top surface on which a plurality of concave portions or convex portions are provided and the sealing section is configured of a flat surface on which neither concave portion nor convex portion is provided, and wherein the accommodating space in the exterior packaging member has a curved shape at least in a first direction.

2. The pouch-type battery of claim 1 , wherein the top surface of the cup section of the first film member has a curved shape and is provided with the plurality of concave portions or convex portions, and the sealing section has a curved shape in the first direction and is configured of the flat surface on which neither concave portion nor convex portion is provided.

3. The pouch-type battery of claim 1 ,
wherein the top surface of the cup section of the first film member has a planar shape and is provided with the plurality of concave portions or convex portions, and the sealing section has a planar shape in a first direction and is configured of the flat surface on which neither concave portion nor convex portion is provided.

4. The pouch-type battery of claim 3 ,
wherein the plurality of concave portions or convex portions extend in a second direction intersecting with the first direction, on the top surface of the cup section of the first film member.

5. The pouch-type battery of claim 4 ,
wherein the plurality of concave portions or convex portions extend from one end to the other end of the top surface of the cup section of the first film member.

6. The pouch-type battery of claim 4 ,
wherein the top surface of the cup section of the first film member has a corrugation structure in which the concave portions and the convex portions are alternately disposed in the first direction.

7. The pouch-type battery of claim 6 ,
wherein, in the corrugation structure of the top surface of the cup section of the first film member, a corrugation height on an end side is greater than a corrugation height at the center portion in the first direction.

8. The pouch-type battery of claim 6 ,
wherein, in the corrugation structure of the top surface of the cup section of the first film member, a corrugation pitch on an end side is narrower than a corrugation pitch at the center portion in the first direction.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Iseri Mitsuhiro
• Ueda Tomohiro
• Asano Yuya
• Yagi Haruhisa

Classifications

• H01M50/124 Primary

  having a layered structure · CPC title

• H01M50/136

  Flexibility or foldability · CPC title

• H01M50/129

  with two or more layers of only organic material · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M50/55

  on the same side of the cell · CPC title