Charge equalization system for batteries

摘要

An equalization system for batteries has two series-connected accumulator stages connected, each including an accumulator, a voltage generator including positive and negative poles, for each stage, an associated charging device supplied by the voltage generator. The charging device includes an inductor having a first and second ends, and a capacitor having first and second ends. The capacitor's first end connects to the generator's positive pole. It also has a diode whose anode connects to a negative pole of the accumulator stage and whose cathode connects to the inductor's first end. It also has a switch whose first end connects to the inductor. And it also has a control device that controls the generator and closes a switch of a charging device associated with an accumulator stage to be charged so that the inductor stores energy, and causes its transfer to that accumulator stage.

主权项

1. An apparatus comprising a battery equalization system, said battery equalization system comprising two stages of accumulators placed in series, each stage having a negative pole and a positive pole, each stage comprising an accumulator placed between said negative pole and said positive pole, a voltage generator comprising a positive terminal and a negative terminal, for each stage of accumulators, an associated charging device powered by said voltage generator, said associated charging device comprising an inductor, a first capacitor having a first end and a second end, said first end being connected to a terminal of said voltage generator, a diode having an anode and a cathode, said diode being connected by said anode to said negative pole of said associated stage of accumulators and connected to an end of said inductor to allow, when said diode is forward biased, a flow of a charging current through said associated stage of accumulators, said associated diode and said associated inductor, and a switch, one end of which is linked to an end of said inductor so that said switch, said inductor and said first capacitor of said associated charging device are connected in series between a terminal of said voltage generator and a pole of said associated stage of accumulators, and a control device configured to, during a conduction time interval, to apply a voltage variation between said terminals of said voltage generator and to close a switch of a charging device associated with a stage of accumulators to be charged such that said inductor and said switch of said charging device are traversed by an increasing power supply current originating from said voltage generator and such that said inductor stores energy, and after said conduction time interval, to interrupt said power supply current through said inductor and allow transfer of the energy stored in said inductor to said associated stage of accumulators by flow of a decreasing charging current through said associated inductor and said associated diode.