Photovoltaic module

Abstract

It is an object of the present invention to provide a photovoltaic module capable of reducing an area occupied by interconnectors. The photovoltaic module of the present invention comprises light-transmitting substrate, strings including a plurality of solar cells interconnected through tab connector, and rear surface member. A plurality of the strings is electrically connected through interconnectors and arranged on a rear surface side so as not to overlap each other. The photovoltaic module is sealed with a sealant between the light-transmitting substrate and the rear surface member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view illustrating a schematic photovoltaic module according to the embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating a photovoltaic submodule used for the photovoltaic module in the present invention.

FIG. 3 is a schematic cross-sectional view illustrating a solar cell used in the embodiment of the present invention.

FIG. 4 is a schematic plan view seeing from the rear surface side illustrating a connection status between strings in the first embodiment of the present invention.

FIG. 5 is a circuit explanation view schematically illustrating the connection status between the strings in the first embodiment of the present invention.

FIG. 6 is a schematic structural diagram of manufacturing equipment for manufacturing the photovoltaic submodule.

FIG. 7 is a schematic cross-sectional view illustrating the photovoltaic submodule used for the photovoltaic module in the second embodiment of the present invention.

FIG. 8 is a schematic cross-sectional view illustrating the photovoltaic submodule used for the photovoltaic module in the second embodiment of the present invention.

FIG. 9 is a schematic plan view seeing from the rear surface side illustrating the connection status between the strings in the second embodiment of the present invention.

FIG. 10 is a circuit explanation view schematically illustrating the connection status between the strings in the second embodiment of the present invention.

FIG. 11 is a schematic plan view seeing from the rear surface side illustrating the connection status between the strings in the third embodiment of the present invention.

FIG. 12 is a schematic plan view seeing from the rear surface side illustrating the connection status between the strings in the fourth embodiment of the present invention.

FIG. 13 is a schematic plan view seeing from the rear surface side illustrating a modified embodiment of the connection status between the strings in the embodiment of the present invention.

FIG. 14 is a schematic plan view seeing from the rear surface side illustrating a modified embodiment of the connection status between the strings in the embodiment of the present invention.

FIG. 15 is a schematic plan view seeing from the rear surface side illustrating a modified embodiment of the connection status between the strings in the embodiment of the present invention.

FIG. 16 is a schematic plan view illustrating an example of method for connecting between rear surface interconnectors and series-connected tab connectors at the edge of the solar cell in the embodiment of the present invention.

FIG. 17 is a schematic plan view illustrating an example of method for connecting between rear surface interconnectors and series-connected tab connectors at the edge of the solar cell in the embodiment of the present invention.

FIG. 18 is a schematic plan view illustrating an example of method for connecting between rear surface interconnectors and series-connected tab connectors at the edge of the solar cell in the embodiment of the present invention.

FIG. 19 is a schematic plan view illustrating an arrangement relationship of the rear surface interconnectors in the embodiment of the present invention.

FIG. 20 is a cross-sectional view partially illustrating the structure of the conventional photovoltaic module.

FIG. 21 is a plan view of the conventional photovoltaic module.

Claims

1. A photovoltaic module comprising: a light-transmitting substrate;a unit including a plurality of solar cells connected through a tab connector;a rear surface member;interconnectors electrically connecting a plurality of the units; anda sealant sealing the plurality of the units connected through the interconnectors between the light transmitting substrate and the rear surface member, whereinthe interconnectors are arranged on a rear surface side of the solar cell.

2. The photovoltaic module according to claim 1, wherein the interconnectors are arranged on the rear surface side of the solar cell so as not to overlap each other.

3. The photovoltaic module according to claim 2, wherein for the interconnectors, a metal foil coated with a laminated film having self-adhesiveness is used.

4. The photovoltaic module according to claim 2, wherein for the interconnectors, a wide tab connector having a line width which is not less than two hundreds times a film thickness is used.

5. The photovoltaic module according to claim 3, wherein for the interconnectors, a metal foil having a film thickness which is not less than 100 μm and not more than 300 μm and a width which is not less than 20 mm and not more than 35 mm is used.

6. The photovoltaic module according to claim 1, wherein the unit is interconnected through tab connectors with solar cells arranged on same surface side having alternately reversed polarity, andsolar cells of adjacent units have alternately reversed polarity.

7. The photovoltaic module according to claim 6, wherein the interconnectors are arranged on the rear surface side of the solar cell so as not to overlap each other.

8. The photovoltaic module according to claim 7, wherein for the interconnectors, a metal foil coated with a laminated film having self-adhesiveness.

9. The photovoltaic module according to claim 7, wherein for the interconnectors, a wide tab connector having a line width which is not less than two hundreds times a film thickness is used.

10. The photovoltaic module according to claim 9, wherein for the interconnectors, a metal foil having a film thickness which is not less than 100 μm and not more than 300 μm and a width which is not less than 20 mm and not more than 35 mm is used.