Method and apparatus for testing batteries

Details Method and apparatus for testing batteries Method and apparatus for testing batteries

1987-10-26

1989-05-02

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

340636, G01N 2746

Patent

active

048272205

ABSTRACT:
A circuit for testing a computer battery without removing it from the computer includes a plurality of serially connected resistors, and a transistor connected to saturate. The voltages at the junctions of the transistors is sensed by a logic device such as a buffer, for application to the data bus of the computer. The transistor may be controlled from the computer via a latch. The resistors have values to produce voltages at two sensed resistor junctions such that the corresponding logic levels applied to the computer are the same, at a first level, when the battery voltage is acceptable, are the same at another logic level when the battery voltage is unacceptable, and are different when the battery voltage is between acceptable and unacceptable voltage values.

REFERENCES:
patent: 4193026 (1980-03-01), Finger et al.
patent: 4520353 (1985-03-01), McAuliffe
patent: 4670703 (1987-06-01), Williams

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