Method for detecting low battery state without precise calibrati

Details Method for detecting low battery state without precise calibrati Method for detecting low battery state without precise calibrati

1991-02-14

1993-12-07

Cosimano, Edward R.

Boots, shoes, and leggings

323275, 340636, 364550, G05F 1565

Patent

active

052688453

ABSTRACT:
A portable electronic system, which can accurately predict impending battery failure, without using expensive comparators, by using voltage and current measurements to determine the source impedance of a battery. Preferably two banks of batteries are used, with a load-switching relay; the voltage and current of both banks is monitored, so that voltage drop under load can be monitored. Alternatively, the voltage variation of a single battery bank can simply be correlated to the current drawn by a changing load.

REFERENCES:
patent: 3899732 (1975-08-01), Staby
patent: 4288739 (1981-09-01), Nercessian
patent: 5087870 (1992-02-01), Salesky et al.

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