Title:
METHOD FOR DECIDING DETERIORATION OF STORAGE BATTERY
Document Type and Number:
Japanese Patent JP3927751
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for deciding deterioration of a storage battery, capable of deciding deterioration by maintaining the storage battery in a usable state, without requiring a discharging test, and is capable of reducing maintenance cost.
SOLUTION: Internal resistance of a plurality of cells comprising the storage battery are measured, and each of the cells having a value of 0.79 mΩ, which is a resistance value of deciding criteria, or lower is classified as a satisfactory cell. A ratio (%) of satisfactory cells obtained from the number of good cells and the number of total cells, and a capacity of the storage battery is estimated, based on the ratio (%) by using conversion graphs, etc., and deterioration is decided. Since conventional discharging tests are not performed, therefore decision of the deterioration of the storage battery can be performed by maintaining a usable state as an emergency power source. Then by measuring internal resistance of each cell, only considerably deteriorated cells can be selected and replaced, maintenance costs can be reduced.
Inventors:
Nagashima Isamu
Toshio Fujita
Toshio Fujita
Application Number:
JP2000060323A
Publication Date:
June 13, 2007
Filing Date:
March 06, 2000
Export Citation:
Assignee:
Idemitsu Engineering Co., Ltd.
International Classes:
G01R31/36; H01M10/42; H01M10/48; H02J7/00; (IPC1-7): H01M10/48; G01R31/36; H02J7/00
Domestic Patent References:
| JP8179018A | ||||
| JP2236473A | ||||
| JP8146107A |
Attorney, Agent or Firm:
Kinoshita Minoru
Kanji Nakayama
Tsuyoshi Ishizaki
Kanji Nakayama
Tsuyoshi Ishizaki