Improvements in battery charging circuits

Details Improvements in battery charging circuits Improvements in battery charging circuits

1991-06-05

1994-04-26

Stephan, Steven L.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

H02J 704, H02J 716

Patent

active

053070020

ABSTRACT:
A battery charging circuit comprising means to supply a DC output from the mains supply for inter alia recharging a rechargeable battery, switch means in series with the battery across the DC output which are normally closed but which open from time to time to disconnect the battery from the DC output, battery voltage monitoring means for measuring the potential or emf of the battery at the time when the switch means are open, and means for determining a maximum potential and therefore fully charged state for the battery and decreasing the charging current from the DC output to the battery when a fully charged state is determined.

REFERENCES:
patent: 3576487 (1971-04-01), Chase
patent: 3621359 (1971-11-01), Schnegg
patent: 4563628 (1986-01-01), Tietz et al.
patent: 4595872 (1986-06-01), Ball
patent: 4670703 (1987-06-01), Williams
patent: 5122721 (1992-06-01), Okada et al.
"Power Electronics in the Minicomputer Industry", William W. Burns, III, member, IEEE, 8078 Proceedings of the I.E.E.E., 76 (1988) Apr., No. 4, New York, N.Y.
"Battery-Switching Circuit for Dual-Battery Systems" May, 1989, vol. 31, No. 12, pp. 319 and 320. IBM Technical Disclosure Bulletin.

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