Vehicle battery diagnostic device

Details Vehicle battery diagnostic device Vehicle battery diagnostic device

1986-08-07

1988-01-12

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324426, 324430, 324431, 320 48, G01N 2746, H02J 704

Patent

active

047194278

ABSTRACT:
A vehicular charging system is provided with a microcomputer for performing a diagnostic routine on the vehicle battery and charging system. The battery charging condition and internal resistance are monitored to determine the service life of the battery and the state of the battery charging system. The internal resistance is calculated by taking the difference between the voltage when the battery terminals are in an open circuit condition and the voltage when the battery terminals are in a closed circuit state and dividing this difference by the battery current. Also included in the charge condition measurement is the measurement of the specific gravity of the battery.

REFERENCES:
patent: 4028616 (1977-06-01), Stevens
patent: 4308492 (1981-12-01), Mori et al.
patent: 4329406 (1982-05-01), Dahl et al.
patent: 4543521 (1985-09-01), Morishita et al.
patent: 4583036 (1986-04-01), Morishita et al.

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