Photovoltaic module and photovoltaic system

Abstract

The embodiment of the invention discloses a photovoltaic module and a photovoltaic system, relates to the technical field of photovoltaic, and aims to prolong the service life of a shielded battery to a certain extent and further prolong the service life of the photovoltaic module while improving the output electric quantity of the photovoltaic module. The photovoltaic module comprises at least two battery string groups, wherein at least two battery string groups are connected in series, and each battery string group comprises at least two battery strings connected in parallel; and two ends of at least two battery string groups connected in series are respectively a positive electrode output end and a negative electrode output end. The invention is suitable for converting solar energy into electric energy.

Description

technical field [0001] The present application relates to the field of photovoltaic technology, in particular to a photovoltaic module and a photovoltaic system. Background technique [0002] In the photovoltaic power generation system, the photovoltaic module is the core to realize the conversion of solar energy into electrical energy. Such as figure 1 As shown, in the prior art, the photovoltaic module includes a plurality of photovoltaic cell strings formed by connecting multiple photovoltaic cells in series, and the relationship between the plurality of photovoltaic cell strings is in series, in order to ensure that the cells in the photovoltaic cell strings are shaded To increase the output power of photovoltaic modules, connect diodes in parallel at both ends of each photovoltaic cell string. However, when the photovoltaic cells in the photovoltaic cell string are blocked, a path is formed between the cell string and the diode, and the blocked photovoltaic cell is loc...

AI Technical Summary

Problems solved by technology

As shown in Figure 1, in the prior art, photovoltaic The module includes a plurality of photovoltaic cell strings formed by connecting multiple photovoltaic cells in series. The relationship between the plurality of photovoltaic cell strings is in series. Diodes are connected in parallel at both ends of each photovoltaic cell string. However, when the photovoltaic cell in the photovoltaic cell string is blocked, a path is formed between the cell string and the diode, and the photovoltaic cell string where the blocked photovoltaic cell is located does not output power to the outside, resulting in The output power of the photovoltaic module is still low, and the energy consumed by the shaded photovoltaic cell is provided by other photovoltaic cells in the photovoltaic cell string where the shaded photovoltaic cell is located. Since the shaded photovoltaic cell consumes the energy of other batteries, Lead to hot spots on the shaded cells, and hot spots are the main factors affecting the life of photovoltaic cells, which will shorten the life of the shaded cells, and further shorten the life of photovoltaic modules

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