US 12,328,952 B2
Large cell sheets, solar cells, shingled solar module, and manufacturing method thereof
Bingwei Yin, Hefei (CN); Jun Sun, Hefei (CN); Dengyun Chen, Hefei (CN); Yan Li, Hefei (CN); and Gang Shi, Hefei (CN)
Assigned to TONGWEI SOLAR (HEFEI) CO., LTD., (CN)
Appl. No. 17/915,633
Filed by TONGWEI SOLAR (HEFEI) CO., LTD, Anhui (CN)
PCT Filed Sep. 27, 2020, PCT No. PCT/CN2020/118186
§ 371(c)(1), (2) Date Sep. 29, 2022,
PCT Pub. No. WO2021/013276, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 202010237613.2 (CN), filed on Mar. 30, 2020.
Prior Publication US 2023/0097957 A1, Mar. 30, 2023
Int. Cl. H10F 19/90 (2025.01); H10F 10/14 (2025.01); H10F 71/00 (2025.01); H10F 71/10 (2025.01); H10F 77/166 (2025.01)
CPC H10F 19/904 (2025.01) [H10F 10/14 (2025.01); H10F 71/103 (2025.01); H10F 71/137 (2025.01); H10F 77/1662 (2025.01)] 18 Claims
OG exemplary drawing
 
1. A large cell sheet which is to be split to form a plurality of solar cells which can be arranged in a shingled manner to form a cell string,
wherein the large cell sheet comprises a base sheet, a top surface and a bottom surface of the base sheet are provided with secondary grid lines, and the top surface or bottom surface of the base sheet is provided with primary grid lines spanning all secondary grid lines, the large cell sheet is divided into a plurality of units arranged in a first direction, any two adjacent units are a first unit and a second unit, after the large cell sheet is split the first unit is formed as a first cell, and the second unit is formed as a second cell,
wherein a top surface of a boundary portion between the first unit and the second unit is divided into:
a cutting area extending in a direction perpendicular to the first direction, the cutting area being configured such that the large cell sheet can be cut along it; and
a top surface bonding area and a top surface electrically-conductive contact area which are disposed on a side of the cutting area, and alternately disposed in a direction perpendicular to the first direction, the cutting area and the top surface electrically-conductive contact area being formed as a top surface of an overlapping edge of the second cell,
wherein the top surface bonding area and the top surface electrically-conductive contact area are configured such that when the second cell is located in the cell string, a non-electrically-conductive adhesive can be applied on the top surface bonding area to bond with a bottom surface of another solar cell,
wherein the primary grid lines comprise multiple groups with a group being disposed at an edge of each of the units, each group of primary grid lines comprises a structure with intermittently-arranged multiple segments, the segments of the primary grid lines correspond one to one with the top surface electrically-conductive contact area, and
wherein, after the large cell sheet is split to form solar cells, when the second cell is arranged in a shingled manner with said another solar cell, the top surface electrically-conductive contact area of the second cell can face with a corresponding area on the bottom surface of said another solar cell formed by splitting the large cell sheet to achieve shingled connection of the two solar cells, and the large cell sheet is configured in a way that one of the top surface electrically-conductive contact area of the second cell and the corresponding area of said another solar cell is provided with primary grid lines, and when shingled, the primary grid lines on one of the top surface electrically-conductive contact area of the second cell and the corresponding area on the bottom surface of said another solar cell directly contact with secondary grid lines on the other of the top surface electrically-conductive contact area of the second cell and the corresponding area on the bottom surface of said another solar cell, to achieve electrically-conductive connection of the two solar cells.