METHOD FOR FABRICATING A SOLAR MODULE OF REAR CONTACT SOLAR CELLS USING LINEAR RIBBON-TYPE CONNECTOR STRIPS AND RESPECTIVE SOLAR MODULE
1 Assignment
0 Petitions
Accused Products
Abstract
A solar module and a method for fabricating a solar module comprising a plurality of rear contact solar cells are described. Rear contact solar cells (1) are provided with a large size of e.g. 156×156 mm2. Soldering pad arrangements (13, 15) applied on emitter contacts (5) and base contacts (7) are provided with one or more soldering pads (9, 11) arranged linearly. The soldering pad arrangements (13, 15) are arranged asymmetrically with respect to a longitudinal axis (17). Each solar cell (1) is then separated into first and second cell portions (19, 21) along a line (23) perpendicular to the longitudinal axis (17). Due to such cell separation and the asymmetrical design of the soldering pad arrangements (13, 15), the first and second cell portions (19, 21) may then be arranged alternately along a line with each second cell portion (21) arranged in a 180°-orientation with respect to the first cell portions (19) and such that emitter soldering pad arrangements (13) of a first cell portion (19) are aligned with base soldering pad arrangements (15) of neighboring second cell portions (21), and vice versa. Simple linear ribbon-type connector strips (25) may be used for interconnecting the cell portions (19, 21) by soldering onto the underlying aligned emitter and base soldering pad arrangements (13, 15). The interconnection approach enables using standard ribbon-type connector strips (25) while reducing any bow as well as reducing series resistance losses.
-
Citations
22 Claims
-
1-11. -11. (canceled)
-
12. A method for fabricating a solar module, the method comprising:
-
providing a plurality of rear contact solar cells having emitter contacts and base contacts on a rear surface of a semiconductor substrate and soldering pad arrangements applied on emitter contacts and on base contacts, wherein each soldering pad arrangement comprises one or more soldering pads arranged linearly and wherein the soldering pad arrangements are arranged on the rear surface of the semiconductor substrate asymmetrically with respect to a longitudinal axis of the semiconductor substrate; separating each of the rear contact solar cells into first and second cell portions along a line perpendicular to the longitudinal axis of the semiconductor substrate; arranging the plurality of first and second cell portions of the rear contact solar cells alternately along a line such that the second cell portions are arranged in a 180°
orientation with respect to the first cell portions and such that soldering pad arrangements of emitter contacts and of base contacts of first cell portions are aligned with soldering pad arrangements of base contacts and of emitter contacts of second cell portions, respectively;electrically connecting the plurality of first and second cell portions of the rear contact solar cells in series by arranging a linear ribbon-type connector strip on top of a linear soldering pad arrangement of an emitter contact of each first cell portion and on top of an aligned linear soldering pad arrangement of a base contact of a second cell portion neighboring the respective first cell portion on one side, and by arranging a linear ribbon-type connector strip on top of a linear soldering pad arrangement of a base contact of the respective first cell portion and on top of an aligned linear soldering pad arrangement of an emitter contact of a second cell portion neighboring the respective first cell portion on an opposite side, and by electrically connecting the connector strips to the underlying soldering pad arrangements. - View Dependent Claims (13, 14, 15, 16, 17)
-
-
18. A solar module comprising a plurality of first and second cell portions of rear contact solar cells arranged along a longitudinal axis,
wherein each of the first and second cell portions comprises soldering pad arrangements on top of each of emitter contacts and base contacts which soldering pad arrangements each comprise one or more soldering pads arranged linearly and the soldering pad arrangements being arranged on the rear surface of the semiconductor substrate asymmetrically with respect to a longitudinal axis of the semiconductor substrate; -
wherein the plurality of first and second cell portions of the rear contact solar cells are arranged alternately along a line such that the second cell portions are arranged in a 180°
orientation with respect to the first cell portions and such that soldering pad arrangements of emitter contacts and of base contacts of the first cell portions are aligned with soldering pad arrangements of base contacts and of emitter contacts of the second cell portions, respectively; andwherein the plurality of first and second cell portions of the rear contact solar cells are connected in series by linear ribbon-type connectors strips each being arranged on top of a linear soldering pad arrangement of an emitter contact of each first cell portion and on top of an aligned linear soldering pad arrangement of a base contact of a second cell portion neighboring the respective first cell portion on one side and by linear ribbon-type connector strips each being arranged on top of a linear soldering pad arrangement of a base contact of the respective first cell portion and on top of an aligned linear soldering pad arrangement of an emitter contact of a second cell portion neighboring the respective first cell portion on an opposite side, wherein no insulation layer is interposed between each of the connector strips and the emitter and base contacts. - View Dependent Claims (19, 20, 21, 22)
-
Specification