Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1983-09-28
1986-12-16
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, 320 59, 320DIG2, 307 66, 323235, H02J 704, H02J 900
Patent
active
046299645
ABSTRACT:
A regulated, low-voltage DC power source which draws energy from a standard AC outlet and uses a bank of lead-acid batteries for intermediate power storage.
The power source features a multi-level charge-voltage controller which is automatically adjusted in function of the net current flowing in or out of the batteries. The charge-voltage control is accomplished by switching the charging current rectifiers on or off only at the zero-axis crossing in order to minimize voltage spikes, and only at every other crossing in order to minimize DC components in the secondary of the transformer. Charge current, load current and net battery current are separately metered in order to provide maximum efficiency and safety in the operation of the power source. A low-voltage-drop series regulator is relied upon to provide a 5 volt regulated output to the load from a 6 volt unregulated battery voltage source.
REFERENCES:
patent: 3950689 (1976-04-01), Jamison
patent: 4194146 (1980-03-01), Patry et al.
patent: 4220872 (1980-09-01), Fahey
patent: 4307330 (1981-12-01), Belot
patent: 4323788 (1982-04-01), Smith
patent: 4366390 (1982-12-01), Rathmann
patent: 4400661 (1983-08-01), Duley
patent: 4488057 (1984-12-01), Clarke
"SCR Zero-Cross Trigger Limits Maximum Load Power", Eckhardt, Designer's Casebook, Pub., McGraw-Hill, Aug., 1979, p. 51.
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