Patent ID: 9130391
Filing Date: 2015-09-08
Classification: B60L,H02J,Y02T

Abstract:
1. An apparatus comprising a charge balancing system for a power battery, said charge balancing system comprising a predefined number of modules connected in series, each module comprising at least two accumulator stages, each accumulator stage comprising at least one accumulator, a plurality of isolated converters configured in parallel and connected to a predefined number of associated accumulator stages and to a low-voltage power system for supplying electrical auxiliaries of an automobile, said plurality of isolated converters comprising a plurality of first unidirectional converters, each of which is connected across terminals of a module and to said low-voltage supply system, and a plurality of second unidirectional converters each of which is connected to said low-voltage supply system and across said terminals of said accumulator stages of said module, and a control unit for said first unidirectional converters and for said second unidirectional converters, said control unit being configured for controlling at least a first converter in such a manner as to bring said predefined number of modules to a similar level of charge or discharge, for controlling a transfer of energy from said power battery to said low-voltage supply system via said first converters, and for controlling at least a second converter in such a manner as to bring said associated accumulator stages of a module to a similar level of charge or discharge.