Battery charger spark suppressor

Details Battery charger spark suppressor Battery charger spark suppressor

1986-02-18

1987-07-21

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 11, 361 58, 320 40, H02H 718

Patent

active

046822623

ABSTRACT:
A spark suppression circuit for a battery charger includes a large filter capacitor connected in series with a semiconductor switch across the terminals of the battery charger. The battery charger does not have any output voltage even though the input is energized because the circuit includes a device to delay supplying of voltage until after the charger output terminals are connected to a battery to be charged. The semiconductor switch is non-conductive until the battery charger output terminals are actually connected to the battery to be charged. At this time, a bias circuit connected across the charger output terminals supplies a bias to turn on the semiconductor switch so that only at that time is the filter capacitor connected across the charger output terminals, and hence this suppresses the possibility of a spark upon connection of the charger output terminals to the battery to be charged.

REFERENCES:
patent: 3075124 (1963-01-01), Bagno
patent: 3614464 (1971-10-01), Chumakov
patent: 3729655 (1973-04-01), Gratzke
patent: 3781631 (1973-12-01), Nelson et al.
patent: 3912941 (1975-10-01), Passarella
patent: 4025820 (1977-05-01), Penrod
patent: 4062051 (1977-12-01), Way
patent: 4241369 (1980-12-01), Ikawa
patent: 4251845 (1981-02-01), Hancock
patent: 4383212 (1983-05-01), Ballman
patent: 4602204 (1986-07-01), Hose

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