Method of determining battery life

Details Method of determining battery life Method of determining battery life

1982-09-30

1984-03-20

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

With measuring, testing, or indicating means

For charge or liquid level

429 50, H01M 600

Patent

active

044381824

ABSTRACT:
A method of determining battery life is shown wherein a dielectric constant sensor measures the dielectric constant value of the electrolyte of the battery. The measured dielectric constant value is compared to empirical values to provide battery status. In particular, a fluid electrolyte initially composed of thionyl chloride changes during discharge or aging to an electrolyte having sulfur monochloride therein. Based upon the changes in dielectric constant between the initial fully charged state to the fully discharged state, the battery status is obtained.

REFERENCES:
patent: 3508973 (1970-04-01), Hicks et al.
patent: 4025700 (1977-05-01), Fagan, Jr. et al.
patent: 4074025 (1978-02-01), Miyagawa
patent: 4179799 (1979-12-01), Fritts
patent: 4293622 (1981-10-01), Marincic et al.

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