Charging system and method for multicell storage batteries

Details Charging system and method for multicell storage batteries Charging system and method for multicell storage batteries

H - Electricity

02

J

320/11

H02J 7/10 (2006.01) H02J 7/00 (2006.01)

Patent

CA 1072631

ABSTRACT OF THE DISCLOSURE A battery-charging system includes a first charging circuit connected in series with a plurality of battery cells for controlled current charging. A second charging circuit applies a controlled voltage across each individual cell for equalization of the cells to the fully charged condition. This controlled voltage is determined at a level above the fully charged open-circuit voltage but at a sufficiently low level to prevent corrosion of cell components by electrochemical reaction. In this second circuit for cell equalization, a transformer primary receives closely regulated, square-wave voltage which is coupled to a plurality of equal secondary coil windings. Each secondary winding is connected in parallel to each cell of a series-connected pair of cells through half-wave rectifiers and a shared, intermediate conductor.

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