US 12,191,807 B2
Non-destructive testing system and device for photovoltaic cells
Yunze He, Changsha (CN); Ruizhen Yang, Changsha (CN); Hongjin Wang, Changsha (CN); Zihao Sui, Changsha (CN); Pan Wang, Changsha (CN); and Xiaofei Zhang, Changsha (CN)
Assigned to Hunan University, Changsha (CN)
Filed by Hunan University, Changsha (CN)
Filed on Mar. 6, 2023, as Appl. No. 18/179,031.
Claims priority of application No. 202210270220.0 (CN), filed on Mar. 18, 2022.
Prior Publication US 2023/0208355 A1, Jun. 29, 2023
Int. Cl. H02S 50/15 (2014.01); G01J 5/00 (2022.01); G01J 5/48 (2022.01)
CPC H02S 50/15 (2014.12) [G01J 5/485 (2022.01); G01J 2005/0077 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A non-destructive testing system for photovoltaic cells, comprising:
a non-contact electromagnetic induction device;
a short-wave infrared (SWIR) camera or/and a visible-light camera;
a thermal imaging device; and
an image processing device;
wherein the non-contact electromagnetic induction device is configured to generate an external electric field acting on a to-be-tested photovoltaic cell without being in contact with the to-be-tested photovoltaic cell; and a direction of the external electric field is parallel to a direction of an internal electric field of the to-be-tested photovoltaic cell;
the SWIR camera or/and the visible light camera is/are configured to obtain an optical radiation distribution map within the to-be-tested photovoltaic cell;
the thermal imaging device is configured to obtain a thermal radiation distribution map within the to-be-tested photovoltaic cell;
the image processing device is configured to store and process the optical radiation distribution map and the thermal radiation distribution map;
the non-contact electromagnetic induction device comprises two induction coils; the two induction coils are respectively provided on both sides of the to-be-tested photovoltaic cell; and the two induction coils are parallel to the direction of the internal electric field of the to-be-tested photovoltaic cell; and
the two induction coils are the same in current magnitude and direction.