METHOD FOR PREDICTING DEGRADATION OF STORAGE BATTERY

Title:

METHOD FOR PREDICTING DEGRADATION OF STORAGE BATTERY

Document Type and Number:

Japanese Patent JP2003161768

Kind Code:

A

Abstract:

To provide a method for predicting degradation of storage battery, superior in reliability and capable of highly accurately predicting the progress of degradation of a storage battery with regard to changes in the temperature of the storage battery and charges and discharges of the storage battery.

An arithmetic expression (4) expressing the state of degradation of the capacity of the storage battery with the passage of time with the presence times of the temperature T of the storage battery in a plurality of temperature ranges as parameters is previously obtained. From predicted changes in the temperature of the storage battery with the passage of time, the presence time of the temperature T of the storage battery in each temperature range is grasped. By substituting the presence time of the temperature T of the storage battery in each temperature range in the arithmetic expression (4), the state of degradation of the storage battery is predicted.

Inventors:

KATO NAOKI
SHIMA HIDEFUMI
KUDO MITSURU
NOZAKI YOSUKE
AKIYAMA KAZUYA

Application Number:

JP2001362648A

Publication Date:

June 06, 2003

Filing Date:

November 28, 2001

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NTT POWER & BUILDING
NIPPON TELEGRAPH & TELEPHONE

International Classes:

G01R31/36; H01M10/48; H02J7/00; (IPC1-7): G01R31/36; H01M10/48; H02J7/00

Attorney, Agent or Firm:

Takehiko Suzue (5 outside)

Previous Patent: SEMICONDUCTOR TESTING APPARATUS

Next Patent: TESTER FOR RECHARGEABLE BATTERY FOR CORDLESS TELEPHONE