Method for detecting remaining battery current, voltage, and tem

Details Method for detecting remaining battery current, voltage, and tem Method for detecting remaining battery current, voltage, and tem

1995-07-03

1997-07-22

Tso, Edward

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

429 90, 324427, H01M 1048

Patent

active

056507127

ABSTRACT:
A map charging index representing discharge characteristics of a battery is obtained based on a battery voltage under a predetermined discharging operation. The map charging index indicates 100 at a first battery voltage obtainable immediately after the battery starts the discharging operation from a fully charged condition and also indicates 0 at a second battery voltage obtainable when the battery substantially ceases the discharging operation. An accumulative charging index is calculated by subtracting a charged capacity from a temporary full-charge capacity of the battery. The temporary full-charge capacity is corrected based on a difference between the map charging index and the accumulative charging index, thereby obtaining a corrected full-charge capacity. And, a dischargeable capacity of the battery is calculated by subtracting the discharged capacity from the corrected full-charge capacity.

REFERENCES:
patent: 4775827 (1988-10-01), Ijntema et al.
patent: 5144218 (1992-09-01), Bosscha
patent: 5287286 (1994-02-01), Ninomiya
patent: 5434495 (1995-07-01), Toko
patent: 5473262 (1995-12-01), Yoshimatsu

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