Title:
SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2002075318
Kind Code:
A
Abstract:
To provide a secondary battery having a high output, by elucidating the condition of a separator with electrodes and the separator composed as a group.
A distance [cm] between a positive electrode and a negative electrode is expressed as L, the reference weight [g/m2] of a separator is expressed as (u), and the true density [g/cm3] of the separator is expressed as (d). Porosity percentage of the separator in the secondary battery P=(L-u/ d)/L×100 is calculated, and porosity in a range of 15%-45% is regarded as the most suitable value to make the secondary battery have a high output.
Inventors:
MINAMINO TETSUO
HATTORI YOHEI
YOSHII FUMIHIKO
HATTORI YOHEI
YOSHII FUMIHIKO
Application Number:
JP2000260403A
Publication Date:
March 15, 2002
Filing Date:
August 30, 2000
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H01M2/18; H01M2/16; H01M10/04; (IPC1-7): H01M2/18; H01M2/16; H01M10/04
Domestic Patent References:
| JP2000090964A | 2000-03-31 | |||
| JP2000268800A | 2000-09-29 | |||
| JPH0562706A | 1993-03-12 | |||
| JPH0325865A | 1991-02-04 | |||
| JPH06310117A | 1994-11-04 | |||
| JPH03184257A | 1991-08-12 | |||
| JPH04212263A | 1992-08-03 | |||
| JPH08339818A | 1996-12-24 | |||
| JPH0982363A | 1997-03-28 | |||
| JPH11224693A | 1999-08-17 |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)