Title:
METHOD AND APPARATUS FOR ANALYZING AN AgZn BATTERY
Document Type and Number:
WIPO Patent Application WO2001035111
Kind Code:
B1
Abstract:
A method and apparatus for diagnosing the status of a battery having high and low voltage plateau states corresponding to its state of charge in which the battery open circuit voltage is measured (S106) to determine its voltage state and its internal resistance also is measured (S114). A battery having a low voltage state (S116) is tested to determine if its internal resistance is greater than a predetermined maximum resistance (S118) and if it does the battery is considered as possibly having a low electrolyte level, and if it does not the battery is subjected to a current ramp test to determine from the voltage response a point of current transition (S130) due to a battery chemical gassing reaction. The battery state of charge (S132) is determined from curves or algorithms of state of charge versus current transition.
Inventors:
HOENIG STEVEN
SINGH HARMOHAN
PALANISAMY THIRUMALAI G
RUDAI PATRICK M
SINGH HARMOHAN
PALANISAMY THIRUMALAI G
RUDAI PATRICK M
Application Number:
PCT/US2000/030759
Publication Date:
September 07, 2001
Filing Date:
November 08, 2000
Export Citation:
Assignee:
ALLIED SIGNAL INC (US)
International Classes:
G01R31/28; G01R31/36; (IPC1-7): G01R31/36
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