Chemistry: electrical current producing apparatus – product – and – With measuring – testing – or indicating means – For charge or liquid level
Patent
1984-12-24
1986-01-07
LeFevour, Charles F.
Chemistry: electrical current producing apparatus, product, and
With measuring, testing, or indicating means
For charge or liquid level
429105, 429196, 429199, H01M 1048
Patent
active
045634017
ABSTRACT:
An electrochemical cell of the type characterized by an essentially constant operating voltage essentially independent of the degree of cell discharge is disclosed, which in its output voltage exhibits one or more step changes of predetermined and fully adjustable magnitudes at any predetermined point or points during the life of the cell. This enables timely replacement of the cell under non-critical circumstances, and also can be used to indicate state of discharge of the cell. In essence, the anode of the cell comprises a plurality of anode elements which become depleted at mutually different degrees of cell discharge. As each anode element becomes depleted, the internal resistance of the cell increases to cause a drop in the operating voltage of the cell as the remaining active anode elements are required to supply the required current.
REFERENCES:
patent: 4293622 (1981-10-01), Marincic et al.
patent: 4331745 (1982-05-01), Catanzarite
patent: 4416957 (1983-11-01), Goebel et al.
patent: 4431719 (1984-02-01), Uiry
Kane Philip F.
Marincic Nikola
Battery Engineering Inc.
LeFevour Charles F.
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