State of charge battery monitor

Details State of charge battery monitor State of charge battery monitor

1980-08-19

1982-01-05

Smith, Robert I.

Signals and indicators

Indicators

Gravity type

429 90, 429 91, G01F 2302, H01M 3104

Patent

active

043088171

ABSTRACT:
There is disclosed a monitor for monitoring the state of charge of a battery having an internal charge transfer medium. A monitor includes detecting means arranged to be disposed beneath the surface of the charge transfer medium and arranged for sensing the specific gravity of a fluid medium, enclosure means for enclosing the detecting means, and a fluid medium within the enclosure means. The fluid medium exhibits specific gravities related to the degree of electric charge therein and the enclosure means is formed at least partly from a non-permeable electric charge transmissible material to enable the fluid medium to assume the electric charge of the charge transfer medium while substantially separating the fluid medium therefrom. The monitor further includes indicating means responsive to the detecting means for indicating the specific gravity of the fluid medium and thus the state of charge of the battery.

REFERENCES:
patent: 2132923 (1938-10-01), Beck
patent: 3647641 (1972-03-01), Grubb et al.
patent: 3893339 (1975-07-01), Melone
patent: 3895964 (1975-07-01), Sakamoto
patent: 4074025 (1978-02-01), Miyagawa
patent: 4203065 (1980-05-01), Whitford

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