Main-grid-free efficient back-contact solar battery and assembly and manufacturing technology thereof
A technology of solar cells and solar cells, which is applied in the field of solar cells, can solve the problems of impossibility, increase of series resistance, corrosion, etc., and achieve the effect of reducing the difficulty of series connection, reducing the series resistance, and reducing the transmission distance
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Embodiment 1
[0066] refer to figure 1 , figure 2 and Figure 4 , a busbar-free high-efficiency back-contact solar cell, the solar cell includes a solar cell sheet 1 and an electrical connection layer, the backlight surface of the solar cell sheet 1 has a P electrode connected to a P-type doped layer and an N-type doped layer The N electrode connected by heterogeneous layers is characterized in that: the electrical connection layer includes several conductive thin grid lines, and a part of the conductive thin grid lines is connected to the P electrode on the backlight surface of the solar battery sheet 1; the other part of the conductive fine grid lines The grid lines are connected to the N electrodes on the backlight surface of the solar battery sheet 1 , and the thin conductive grid lines have a multi-segment structure.
[0067] Such as figure 1 Shown is a busbar-free high-efficiency back-contact solar battery sheet-8, in which there are 15 rows of dot-shaped P electrodes 2, 16 in eac...
Embodiment 2
[0099] refer to Figure 5 , Figure 6 and Figure 7 , a busbar-free high-efficiency back-contact solar cell, the solar cell includes an electrical connection layer composed of more than one solar cell sheet 1, conductive wires 7 and conductive thin grid lines, and the silicon substrate backlight surface of the solar cell sheet 1 has The P electrode connected to the P-type doped layer and the N electrode connected to the N-type doped layer, the electrical connection layer on the backlight surface of the solar cell sheet 1 has several conductive thin grid lines connected to the P electrode and connected to the N electrode. A plurality of conductive thin grid lines, the conductive thin grid lines are multi-segment structures, and the intersections of the conductive thin grid lines and the conductive wires 7 are provided with barriers to prevent the electrical conduction between the conductive thin grid lines and the conductive wires 7. Insulation medium6.
[0100] Such as Fi...
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