Connecting lead wire for a solar battery, method for fabricating same, and solar battery using the connecting lead wire
AssigneesHitachi Cable, Ltd., Hitachi Cable Fine-Tech, Ltd.
InventorsHajime Nishi, Takayuki Tsuji, Yuju Endo, Hiroyuki Akutsu
Life of this patent
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Abstract
A metallic material is rolled to provide a conductor 3 having a rectangular cross section. A surface of the rectangular conductor 3 is plated with a plating layer 14. A thickness of the plating layer 14 at a surface facing to the Si cell is not more than 5 μm to provide a connecting lead wire 12 for a solar battery. The connecting lead wire 12 for a solar battery has 0.2% proof stress of not more than 60 MPa. The connecting lead wire 12 for a solar battery is connected to a predetermined contact region of a Si cell 1 of a solar battery at a high temperature.
Claims16
A connecting lead wire for a solar battery, to be connected to a predetermined contact region of a Si cell of the solar battery at a high temperature, the connecting lead wire comprising:
- a conductor having a rectangular cross section;
- and
- a plating layer provided on the rectangular conductor;
- wherein a 0.2% proof stress of the connecting lead wire is not more than 60 MPa, and a thickness of the plating layer at a surface facing to the Si cell is not more than 5 μm.
A method for fabricating a connecting lead wire for a solar battery, to be connected to a predetermined contact region of a Si cell of the solar battery at a high temperature, the method comprising the steps of:
- forming a conductor having a rectangular cross section from a metallic material;
- conducting a heat treatment on the rectangular conductor;
- providing a plating layer on the rectangular conductor to have a thickness of not more than 5 μm at a surface facing to the Si cell;
- and
- adjusting a 0.2% proof stress of the connecting lead wire to be not more than 60 MPa.
A solar battery comprising:
- a Si cell;
- and
- a connecting lead wire connected to a predetermined contact region of the Si cell at a high temperature, the connecting lead wire comprising:
- a conductor having a rectangular cross section;
- and a plating layer provided on the rectangular conductor;
- wherein a 0.2% proof stress of the connecting lead wire is not more than 60 MPa, and a thickness of the plating layer at a surface facing to the Si cell is not more than 5 μm.
A method for fabricating a solar battery, comprising the steps of:
- preparing a Si cell having a contact region;
- preparing a connecting lead wire comprising a conductor having a rectangular cross section and a plating layer provided on the rectangular conductor, a 0.2% proof stress of the connecting lead wire being not more than 60 MPa, and a thickness of the plating layer at a surface facing to the Si cell being not more than 5 μm;
- applying a conductive adhesive or a solder on a part of the connecting lead wire to be connected to the predetermined contact region of the Si cell;
- contacting the contact region of the Si cell with the part of the connecting lead wire on which the conductive adhesive or the solder is applied;
- melting the conductive adhesive or the solder by heating at a high temperature;
- and
- solidifying the conductive adhesive or the solder to adhere and connect the contact region of the Si cell and the connecting lead wire with each other.
Dependencies are inferred from the claim text.