Integrated battery

• US 7,288,340 B2
• Filed: 03/18/2004
• Issued: 10/30/2007
• Est. Priority Date: 03/20/2003
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Iwamoto, Kazuya
• Primary Examiner(s): Ryan; Patrick Joseph
• Assistant Examiner(s): ANTHONY, JULIAN
• Application Number:
  US10/802,911
• Publication Number:
  US 20040185334A1
• Time in Patent Office: 1,321 Days
• Field of Search: None
• US Class Current: 429/143
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 50/103 prismatic or rectangular H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 6/18 with solid electrolyte
• CPC Class Codes: H01M 6/40 Printed batteries , e.g. thin film batteries
• CPC Class Codes: H01M 6/46 of flat cells
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

In order to enhance reliability of a battery against bending or twisting in particular, at least one cell group comprising 4 unit cells is formed on a flexible substrate. The cell group has a rectangular shape, and is divided into the 4 unit cells by strip-shaped portions arranged along 2 diagonal lines of the rectangle.

Claims

1. An integrated battery comprising

(a) a flexible substrate and

(b) at least one cell group comprising 4 unit cells arranged on said flexible substrate;

each of said unit cells comprising a positive electrode, a negative electrode and a solid electrolyte interposed between said positive electrode and said negative electrode, and

said cell group having a shape of a rectangle and having strip-shaped plain portions arranged along 2 diagonal lines of said rectangle, said plain portions dividing said rectangular cell group into said 4 unit cells.

2. The integrated battery in accordance with claim 1, wherein said strip-shaped plain portions have a width twice or more times larger than the thickness of said unit cell.

3. The integrated battery in accordance with claim 1, wherein said flexible substrate has a rectangular outer shape, said outer shape being geometrically similar to said shape of said cell group, and said cell group is arranged on said flexible substrate such that each side of said flexible substrate and the corresponding side of said cell group are parallel.