Solar cell interconnect with multiple current paths
View Patent ↗Solar cell interconnects with multiple current paths. A solar cell interconnect may include a plurality of in-plane slits arranged in several rows. The in-plane slits may be spaced to provide strain relief without unduly increasing the electrical path resistance through the solar cell interconnect. The in-plane slits may be staggered, for example.
1. A continuous solar cell interconnect for electrically connecting two adjacent back side contact solar cells, the solar cell interconnect comprising:
a first portion having first and second tabs, the first tab being configured to electrically connect to a conductive pad of a first back side contact solar cell, the second tab being configured to electrically connect to a conductive pad of a second back side contact solar cell that is adjacent to the first back side contact solar cell, the first portion having an in-plane slit located in a first row, an in-plane slit located in a second row, and an in-plane slit located in a third row having first and second opposite ends, the third row being between the first and second rows, the in-plane slit in the third row being staggered with the in-plane slits in the first and second rows to form a first electrical current path that goes from the first tab, around the first end of the in-plane slit in the third row, and to the second tab, and a second electrical current path that goes from the first tab, around the second end of the in-plane slit in the third row, and to the second tab, the first and second electrical current paths being divergent electrical current paths; and
a second portion having third and fourth tabs, the third tab being configured to electrically connect to a conductive pad of the first back side contact solar cell, the fourth tab being configured to electrically connect to a conductive pad of the second back side contact solar cell;
wherein the solar cell interconnect has a solid plane between the first and second portions.
2. The solar cell interconnect of claim 1 further comprising:
a third portion having fifth and sixth tabs, the fifth tab being configured to electrically connect to a conductive pad of the first back side contact solar cell, the sixth tab being configured to electrically connect to a conductive pad of the second back side contact solar cell.
3. The solar cell interconnect of claim 1 wherein the first and second tabs are located on opposite sides of the solar cell interconnect.
4. The solar cell interconnect of claim 1 wherein there are two in-plane slits in the first and second rows and a single in-plane slit in the third row.
5. The solar cell interconnect of claim 1 wherein the first and second tabs are offset relative to each other.
6. The solar cell interconnect of claim 1 wherein the second portion is configured to mirror half of the first portion.
7. The solar cell interconnect of claim 1 further comprising an interconnect shield between the first and second back side contact solar cells and the solar cell interconnect, the interconnect shield comprising a material that visually blocks the interconnects as seen from a front side of the first and second back side contact solar cells.