US 11,728,454 B1
Method for soldering solar cell, cell string, photovoltaic module, and soldering device
Yongqian Wang, Yiwu (CN); Ning Zhang, Yiwu (CN); Wenli Xu, Yiwu (CN); Gang Wang, Yiwu (CN); and Gang Chen, Yiwu (CN)
Assigned to SOLARLAB AIKO EUROPE GMBH, Freiburg (DE)
Filed by Solarlab Aiko Europe GmbH, Freiburg (DE)
Filed on Jun. 21, 2022, as Appl. No. 17/845,962.
Claims priority of application No. 202210201738.9 (CN), filed on Mar. 3, 2022.
Int. Cl. H01L 31/18 (2006.01); H01L 31/0224 (2006.01); H01L 31/05 (2014.01)
CPC H01L 31/186 (2013.01) [H01L 31/022425 (2013.01); H01L 31/05 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for soldering a back contact solar cell string, comprising:
placing a plurality of back contact cells on a soldering platform forming gaps between adjacent back contact cells, wherein
the gaps comprise first gaps and second gaps that are disposed alternately with each other;
back surfaces of the back contact cells face away from the soldering platform, and
electrodes corresponding to two adjacent back contact cells have opposite polarities;
placing a plurality of ribbons on the electrodes of the plurality of back contact cells by using a first clamping portion, a second clamping portion, and a plurality of third clamping portions comprising cutting members, wherein
the first clamping portion, the second clamping portion, and the plurality of third clamping portions respectively correspond to head ends, tail ends, and middle portions of the plurality of ribbons, and
the plurality of ribbons comprises first ribbons and second ribbons, and polarities of electrodes of one of the back contact solar cells corresponding to the first ribbons are opposite to polarities of electrodes of the one of the back contact solar cells corresponding to the second ribbons;
grabbing and cutting the first ribbons at the first gaps and the second ribbons at the second gaps by using the plurality of third clamping portions; and
heating the plurality of ribbons by using a heater to connect the plurality of ribbons to the plurality of back contact solar cells.