Battery evaluation test system

Details Battery evaluation test system Battery evaluation test system

1990-08-13

1991-10-29

Wieder, Kenneth A.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

320 13, 320 48, 324428, G01N 2746, H01M 1048

Patent

active

050618989

ABSTRACT:
A method of evaluating the present capacity of a rechargeable battery by connecting a known test load to the battery so that the battery supplies the test load with electrical current; monitoring the battery voltage while the battery is connected to the test load; monitoring the current supplied to the test load by the battery, and determining the ampere-hours of energy delivered by the battery while it is connected to test load; and determining when the acceleration of the monitored battery voltage changes from negative to positive, and then projecting the ampere-hours of energy that would be delivered by the battery for the remainder of the range of useful output voltages from the battery. The total present capacity of the battery is preferably determined by summing the projected ampere-hours and the ampere-hours actually delivered by the battery to the test load prior to said projection.

REFERENCES:
patent: 4549127 (1985-10-01), Taylor
patent: 4583034 (1986-04-01), Martin
patent: 4595880 (1986-06-01), Patil
patent: 4629965 (1986-12-01), Fallon
patent: 4678998 (1987-07-01), Muramatsu
patent: 4849700 (1989-07-01), Morioka
patent: 4952862 (1990-08-01), Biagetti
patent: 4958127 (1990-08-01), Williams
Ganssle, J., "Marine Electrical Systems", Ocean Navigator, No. 32, May 1990, pp. 40, 44-48.

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