Method and apparatus for measuring the voltage and charge of a b

Details Method and apparatus for measuring the voltage and charge of a b Method and apparatus for measuring the voltage and charge of a b

1989-05-22

1992-09-01

Wieder, Kenneth A.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324433, 324435, 324436, 340636, G01N 2727

Patent

active

051442485

ABSTRACT:
Method and apparatus for measuring the voltage and state of charge of a secondary battery. The voltage and state of charge values are taken by a circuit every four (4) seconds by reading voltage, waiting two (2) seconds, reading current, waiting two (2) seconds, and repeating the voltage readings and the current readings. The circuit includes a 4-bit microprocessor, CMOS analog switches, and two operational amplifiers. The voltage and current readings are taken from dual-sloped converters, and the values determined by software algorithms in the microprocessor.

REFERENCES:
patent: 4390841 (1983-06-01), Martin et al.
patent: 4558281 (1985-12-01), Codd et al.
patent: 4575679 (1986-03-01), Chung et al.
patent: 4678998 (1987-07-01), Muramatsu
patent: 4719427 (1988-01-01), Morishita et al.
patent: 4849700 (1989-07-01), Morioka et al.
patent: 4876513 (1989-10-01), Brilmyer et al.

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