Battery charger
Patent
·
OSTI ID:6801223
A battery charger in which full-wave rectified current is supplied to a battery through a silicon-controlled rectifier (SCR) is described. By controlling the gating of the SCR the average charging current is controlled. An oscillator circuit formed by a unijunction transistor with a timing capacitor in its emitter circuit provides the necessary gating pulses. The charging rate of the capacitor is controlled to alter the period during which the SCR is conductive. This control of the charging rate is provided by a circuit responsive to battery voltage and by a circuit responsive to charging current. A portion of the battery-voltage-responsive circuit acts to short-circuit the capacitor to stop charging in the event that the battery is connected with reverse polarity. A high-charging-rate mode is controlled by a timer circuit which overrides the normal voltage and current control circuits. 2 figures.
- Assignee:
- Controlled Systems (Windsor) Ltd.
- Patent Number(s):
- US 4087733
- OSTI ID:
- 6801223
- Country of Publication:
- United States
- Language:
- English
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