Vehicle Electric Energy Storage Unit Charger

Abstract

A vehicle electrical energy storage unit charger (1) comprising: - a voltage converter (3) comprising at least two voltage conversion modules (4), each voltage conversion module (4) being identical and comprising: - a first inverter / rectifier (5) comprising two switching arms (6), each switching arm (6) comprising two switching cells (7), in particular bidirectional in current and voltage, these two switching cells (7) being mounted in series across the terminals of a first input (12) of the first inverter / rectifier (5) on which an alternating voltage is present, these two switching cells being arranged on either side of a midpoint (8), the two respective midpoints (8) defining a second input of the first inverter / rectifier (5), - a second inverter / rectifier (15), comprising two switching arms (16),each switching arm (16) comprising two switching cells (17) mounted in series across the terminals of a first input (18) of the second inverter / rectifier (15) on which a DC voltage is present, these two switching cells (17) being arranged on either side of a midpoint (19), the two respective midpoints defining a second input of the second inverter / rectifier (15), and - an isolation transformer (20) comprising a primary winding (21) whose terminals are connected to the second input (8) of the first inverter / rectifier (5), and a secondary winding (22) whose terminals are connected to the second input (18) of the second inverter / rectifier (15), the first inputs (18) of the second inverter / rectifiers (15) of the voltage conversion modules (4) being mounted in series or in parallel so as to be able to be connected together to an electrical energy storage unit (2). Abbreviated figure: Fig. 1,

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