Auto-start and magnetic shut down battery charging and surveilla

Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries

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Details

320 11, 320 39, 320DIG2, 320 35, 320 48, H02J 710

Patent

active

046022040

ABSTRACT:
Battery charging and surveillance circuits are provided which may have either shunt regulation or series regulation of the control coil. Automatic start up of the charging sequence is initiated when a battery is connected to the output terminals by providing a latch circuit which is powered from a capacitor charged from the high ripple voltage at the open output, which capacitor voltage collapses and causes a one-shot circuit to close, which closes a control power cut-off device in series with the control coil, thereby initiating a battery charging sequence. When the battery is to be disconnected, either a push button switch may be momentarily closed or a latch operates to open the cut-off device, thus causing the output voltage of the battery charging circuit to fall below that of the battery--the power diodes in the circuit preclude back-charge from the battery--so that the battery may then be disconnected without any substantial current flow and therefore without any arcing at the output terminals. No electro-mechanical AC power interruptors are required.

REFERENCES:
patent: 3652916 (1972-03-01), Ballman
patent: 3735233 (1973-05-01), Ringle
patent: 3781631 (1973-12-01), Nelson et al.
patent: 3848173 (1974-11-01), Hase
patent: 4320333 (1983-03-01), Hase
patent: 4383212 (1979-05-01), Ballman
patent: 4399396 (1983-08-01), Hase

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