Mitsubishi Electric Corporation

Daisuke Echizenya

Shinsuke Miyamoto

Hiroo Sakamoto

Masashi Nakamura

Teruto Miura

Atsushi Michimori

Tsuneo Hamaguchi

Yoshimi Yabugaki

Hiroaki Sugiura

Jun Fujita

Tomohiro Sasagawa

Hiroaki Morikawa

Norihiro Watanabe

Hiromichi Aoki

Junichi Yasuda

Shiro Takada

Keiichiro Utsunomiya

Hisashi Tominaga

Yoshikazu Ikuta

Nobuaki Ando

Taisuke Sueda

Tomoo Takayama

A failure prediction device is provided for predicting, using a structure having a high degree of design freedom, failure at a soldered joint due to vibration stress, and a circuit board using the same. The failure prediction device is disposed on a substrate having a mounting component that is fixed thereon through a solder joint. The failure prediction device is provided with a load amplifying portion that includes a pair of support leg portions each having one end to be fixed to the substrate or the mounting component, and a sacrificial fracture portion that is supported by the other ends of the pair of support leg portions, wherein the load amplifying portion transmits, to the sacrificial fracture portion via the pair of support leg portions, vibration that is applied to the substrate.

Failure prediction device and circuit board using the same

To obtain a reinforcing frame capable of securing sufficient reinforcing strength and adhesive strength while suppressing a manufacturing cost by omitting a rim-like frame. A reinforcing frame is adhered to a rear surface, which is a non-light receiving surface of a solar battery panel, and includes a cylindrical portion that has a cylindrical shape along a longitudinal direction of the reinforcing frame and on which an adhesive surface for adhering to the solar battery panel is formed, and protruding portions that protrude from end portions along a longitudinal direction of the adhesive surface and that are substantially parallel to the adhesive surface.

Reinforcing frame and solar battery module

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.

In a solar battery cell, a plurality of silver electrodes are formed in a dot shape with a predetermined gap therebetween linearly along a rear surface tab line. Pitches among the silver electrodes are set so as to be large in a central part of a silicon substrate and small at the ends of the silicon substrate. By arranging many silver electrodes at ends of the silicon substrate having a large stress, the rigidity at the ends is improved, and the warpage is decreased, thereby suppressing cell cracking.

Solar battery cell

A solar cell includes a silicon substrate, an aluminum electrode that collects electricity from the rear surface of the silicon substrate, and a silver electrode that extracts output from the aluminum electrode. The aluminum electrode includes an opening formed on the rear surface of the silicon substrate. On a side of the opening is formed a notch that recesses parallel to the direction in which principal stress acts in a plane of the silicon substrate. The silver electrode covers at least the opening and the notch of the aluminum electrode.

Solar cell

A solar battery cell that comprises a plurality of grid electrodes and light-receiving-surface lead connection electrodes on a light receiving surface of a semiconductor substrate, and comprises a plurality of back-surface lead connection electrodes that are connected to back-surface lead wires, formed on the second straight lines that are substantially opposite to the first straight lines while sandwiching the semiconductor substrate together with the first straight lines, on a back surface of the semiconductor substrate, wherein an edge portion of each of the light-receiving-surface lead connection electrodes is not overlapped with an edge portion of each of the back-surface lead connection electrodes in a width direction.

A solar battery panel wherein cracking of solar battery cells can be reduced without reducing the power generating capacity per unit area. The solar battery panel consists of a plurality of solar battery cells () connected in series by connecting surface electrode tabs () to rear electrode tabs (). In the solar battery panel, a tab-to-tab connecting portion () and a tab-to-cell connecting portion () are arranged via a gap () in the solar battery cell arrangement direction () without these portions overlapping each other. One end portion () of the tab-to-tab connecting portion () exists within a region of a non-light receiving surface ().

Solar battery panel

A solar cell module includes a plate-shaped solar panel including a plurality of solar cells arranged on same plane; a plate-shaped cell protection member that covers the plural solar cells that are arranged on the same plane; and a surface protection member that is bonded onto a top surface of the cell protection member; an outer frame that supports a circumference of the solar panel; and a brace having rigidity against bending and that supports a center area of a back surface of the solar panel in such a manner that both ends of the brace are joined to each of two opposed positions of the outer frame. An initial tension is provided to the brace.

Solar cell module

A Fresnel lens collimates a light modulated by an image signal and outputs a collimated light. A diffusion member diffuses the collimated light and outputs a diffused light. A driver continually moves the Fresnel lens or the diffusion member on a predetermined trajectory within a plane parallel with a screen. A spring member couples the Fresnel lens or the diffusion member with a casing, including a first deformation plane flexible in a first direction within the plane, and a second deformation plane flexible in a second direction substantially perpendicular to the first direction within the plane, while it is not flexible in a direction perpendicular to the plane.

Growing community of inventors

Tokyo, Japan

Daisuke Echizenya