Mitsubishi Electric Corporation

Yoshimi Yabugaki

Daisuke Echizenya

Shinsuke Miyamoto

Tsuneo Hamaguchi

Jun Fujita

Tomoo Takayama

A solar cell module in the present invention includes: a wiring member electrically connecting solar cell elements to each other; and a structure in which a solder bonding portion is formed by bonding a collecting electrode, which is provided on a light receiving surface of the solar cell element, extends in a first direction parallel to the wiring member, and has a width smaller than that of the wiring member in a cross section vertical to the first direction, and the wiring member together by melting solder, a cross-sectional shape of the solder bonding portion vertical to the first direction has a shape that gradually narrows toward the collecting electrode from a lower surface of the wiring member, and a side surface of the solder bonding portion and a side surface of the wiring member are covered with a thermosetting resin.

Solar cell module and manufacturing method thereof

A plurality of thin linear thin wire electrodes are formed entirely over a first surface that is a light receiving surface of a solar cell element, a back surface collecting electrode is formed on a second surface that is a back surface of the solar cell element, and a wiring member which draws power is connected to each of the thin wire electrode and the back surface collecting electrode. The thin wire electrode and the wiring member are bonded with solder and side surfaces of the solder bonding portion in a longitudinal direction along the wiring member are coated with a thermosetting resin, and, in a region excluding the thin wire electrodes, the wiring member and the first surface are bonded with a thermosetting resin. The wiring member and the thin wire electrodes are bonded to have a sufficient mechanical bonding strength and high bonding reliability.

Growing community of inventors

Tokyo, Japan

Yoshimi Yabugaki