Method and apparatus for charging lead-acid-accumulators

Details Method and apparatus for charging lead-acid-accumulators Method and apparatus for charging lead-acid-accumulators

1987-08-27

1989-05-23

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 32, 320 39, H02J 704

Patent

active

048333913

ABSTRACT:
The charging apparatus for lead-acid-accumulators controls the charging current and the charging voltage above the gassing voltage level according to a linearly declining characteristic. The charging current and the charging voltage are converted to a current signal (50) and a voltage signal (60) which are normalized (70, 80) and combined (150) into an indicating signal (160) which is constant as long as the charging current and the charging voltage follow the linear characteristic. A regulating device (130, 140, 40) compares the indicating signal (160) to a reference signal (132) for correcting the charging current and the charging voltage. The current signal (50) and the voltage signal (60) are converted to the indicating signal (160) by means of a weighted summation. For performing the summation there is provided an operational amplifier circuit.

REFERENCES:
patent: 4146830 (1979-03-01), Foster
patent: 4217533 (1980-08-01), Van Beek
patent: 4695784 (1987-09-01), Reynolds

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