US 12,261,234 B2
Solar cell module and method for operating a solar cell module
Max Köntopp, Bitterfeld-Wolfen (DE); Uwe Weigelt, Bitterfeld-Wolfen (DE); Thoralf Harder, Bitterfeld-Wolfen (DE); and Carsten Baer, Bitterfeld-Wolfen (DE)
Assigned to HANWHA Q CELLS GMBH, Bitterfeld-Wolfen (DE)
Appl. No. 17/759,432
Filed by HANWHA Q CELLS GMBH, Bitterfeld-Wolfen (DE)
PCT Filed Jan. 26, 2021, PCT No. PCT/DE2021/100074
§ 371(c)(1), (2) Date Aug. 24, 2022,
PCT Pub. No. WO2021/151430, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 10 2020 101 809.6 (DE), filed on Jan. 27, 2020.
Prior Publication US 2023/0046616 A1, Feb. 16, 2023
Int. Cl. H01L 31/0443 (2014.01); H01L 31/02 (2006.01); H01L 31/05 (2014.01)
CPC H01L 31/0443 (2014.12) [H01L 31/02021 (2013.01); H01L 31/0504 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A solar cell module, comprising:
a plurality of strings formed in each case from a plurality of solar cells connected to one another in a series circuit,
wherein each string is connected to a bypass circuit assigned thereto, and the bypass circuit has a switching element and is configured, upon an occurrence of a back current within an associated string, to reduce an electric current within the associated string by switching of the switching element,
wherein the bypass circuit has a control circuit configured to:
cyclically reduce the electric current within the associated string by controlling the switching element,
upon the occurrence of the back current within the associated string due to a shading situation, to reduce the electric current within the associated string by controlling the switching element for a predefined time period, and
after the predefined time period, and when the shading situation persists, to switch the switching element again in order to limit the electric current in the associated string to cyclically reduce the electric current within the associated string by controlling the switching element.