Photovoltaic-type charger
AssigneeSomfy SAS
InventorsSerge Bruno, Serge Neuman
Life of this patent
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Abstract
A method of producing a photovoltaic panel that includes elementary photovoltaic cells in series and in parallel and intended for charging a low-voltage electrical energy accumulator via a voltage converter includes wiring a minimum number of elementary cells in series between the two terminals of the photovoltaic panel. The minimum number is established such that, under a given illumination, the knee voltage of the photovoltaic panel is greater than the threshold voltage of operation of the converter. The invention also relates to a device for charging a low-voltage accumulator via a converter comprising a photovoltaic panel obtained by this method.
Claims13
A method of producing a photovoltaic panel comprising elementary photovoltaic cells in series and in parallel and intended for charging a low-voltage electrical energy accumulator via a voltage converter,
- wherein a minimum number of elementary cells is wired in series between the two terminals of the photovoltaic panel, the minimum number being defined in such a way that, under a given illumination, the knee voltage of the photovoltaic panel is greater than the threshold voltage (UC) of operation of the converter,
- wherein a set-up voltage converter having a constant multiplicative factor is used.
A device comprising:
- a low-voltage electrical energy accumulator;
- a step-up voltage converter having a constant multiplicative factor;
- a photovoltaic panel comprising elementary photovoltaic cells in series and in parallel and intended for charging the accumulator via the converter, wherein
- interconnection of the elementary photovoltaic cells of said panel is essentially parallel, the series connections being limited to what is necessary for obtaining at least one of:
- a panel knee voltage, and a no-load voltage (UB2), of the panel which is greater than the threshold voltage of operation (UC) of the converter.
Dependencies are inferred from the claim text.