Patent ID: 6150795
Filing Date: 2000-11-21
Classification: H02J,Y02T

Abstract:
A battery equalizer module comprising:(a) a transformer having a primary and a secondary with the same number of turns;(b) a controllable switching device connected in series with the primary between a high side terminal and a first intermediate terminal of the module;(c) a diode connected in series with the secondary between a low side terminal and a second intermediate terminal of the module,whereby the module may be connected to a series connected pair of upper and lower batteries with the high side terminal connected to the high side of the upper battery, the first and second intermediate terminals connected to a junction between the two batteries and the low side terminal connected to the low side of the lower battery, and whereby a controller may be connected to the controllable switching device to control it to switch on and off at a frequency to transfer charge from a more highly charged upper battery in the pair of batteries to a lesser charged lower battery in the pair of batteries.