Module battery

• US 20040050414A1
• Filed: 06/30/2003
• Published: 03/18/2004
• Est. Priority Date: 07/30/2002
• Status: Active Grant

• Current Assignee: Envision AESC Japan Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Oogami, Etsuo
• Granted Patent: US 7,270,912 B2
• Time in Patent Office: Days
• US Class Current: 136/249
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/647 Prismatic or flat cells, e.g. pouch cells
• CPC Class Codes: H01M 10/652 characterised by gradients for achieving a desired temperature gradient H01M10/617
• CPC Class Codes: H01M 10/6555 arranged between the cells
• CPC Class Codes: H01M 50/105 Pouches or flexible bags
• CPC Class Codes: H01M 50/503 characterised by the shape of the interconnectors
• CPC Class Codes: H01M 6/50 Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A module battery comprises a cell including an electrode tab and a cell body having a power generating element hermetically sealed in a package film. The module battery has a constitution in which a plurality of the cells are stacked on one another, and the electrode tabs of the cells adjacent to each other in a stacking direction are interconnected. Further, a bent portion of an approximate L-shape toward the stacking direction of the cells is formed in each of the electrode tabs of the cells, and the bent portions of the cells adjacent to each other in the stacking direction are at least partially overlapped with each other so as to be interconnected.

Claims

1. A module battery, comprising:

a cell including an electrode tab and a cell body having a power generating element hermetically sealed in a package film,

wherein the module battery has a constitution in which a plurality of the cells are stacked on one another, and the electrode tabs of the cells adjacent to each other in a stacking direction are interconnected,

a bent portion of an approximate L-shape toward the stacking direction of the cells is formed in each of the electrode tabs of the cells, and

the bent portions of the cells adjacent to each other in the stacking direction are at least partially overlapped with each other so as to be interconnected.

2. The module battery of claim 1,

wherein a slit is provided in the bent portion.

3. The module battery of claim 2,

wherein the slit is provided in an electrode tab excluding an electrode tab of which the bent portion is disposed on the nearest position to the cell body.

4. The module battery of claim 1,

wherein each of the cells is mounted and held on a frame-shaped cell holder, and

the electrode tab of the cell is exposed from between the cell holders adjacent to each other in the stacking direction.

5. The module battery of claim 4,

wherein the cell holder is made of heat-resistant insulating resin.

6. The module battery of claim 4,

wherein the cell holder has a locate pin, and the cell is provided with a through-bore penetrated by the locate pin of the cell holder.

7. The module battery of claim 6,

wherein the locate pin of the cell holder is projected toward the stacking direction of the cell holders, and a locate hole which receives the locate pin of the cell holder is provided in a cell holder adjacent to the cell holder in the stacking direction.