Abstract: A small cylindrical lithium-ion secondary battery provided with a safety mechanism that enables internal pressure to be released when an anomaly occurs. The battery includes an electrode group formed of a positive electrode and a negative electrode that are wound or stacked with a separator interposed therebetween, an electrolytic solution, a battery case that contains the electrode group and the electrolytic solution, and a sealing body. The battery case has an outer diameter of 10 mm or less. The sealing body includes a ring having a through-hole and includes a sheet-like or film-like valve member disposed such that the valve member covers the through-hole of the ring, and a safety mechanism that causes the valve member to cleave when the internal pressure reaches a predetermined pressure is disposed therein. The ring includes protrusions formed of linear ridge lines that protrude toward an inside of the through-hole.

Abstract: A solar cell module including: a solar cell; a first protection member provided on the light receiving surface side of the solar cell; a second protection member provided on the rear surface side of the solar cell; an encapsulant layer, including a first encapsulant layer disposed between the solar cell and the first protection member, and a second encapsulant layer disposed between the solar cell and the second protection member, which seals the solar cell; and a wavelength conversion substance, contained in at least the first encapsulant layer, which absorbs light having a specified wavelength, and converts the wavelength. The concentration of the wavelength conversion substance is higher in the first encapsulant layer than in the second encapsulant layer, and a resin constituting the second encapsulant layer has a smaller diffusion coefficient of the wavelength conversion substance than the diffusion coefficient of a resin constituting the first encapsulant layer.

Abstract: It is an object of the present invention to easily and inexpensively provide a structure of effectively utilizing a light incident on an invalid area of a solar cell. Moreover, it is another object to improve output characteristics of the solar cell by effectively utilizing the light. The gist of the present invention resides in a solar battery module in which plate-like solar cells are held between a light penetrable sheet member on a light receiving surface side and a sheet member on a back surface side, and internal apertures are filled. with a sealing resin, wherein a light diffusion section for diffusely reflecting a light or a light diffusion section of a white color is arranged in an invalid region of each solar cell.

Abstract: A small cylindrical lithium-ion secondary battery provided with a safety mechanism that enables internal pressure to be released when an anomaly occurs. The battery includes an electrode group formed of a positive electrode and a negative electrode that are wound or stacked with a separator interposed therebetween, an electrolytic solution, a battery case that contains the electrode group and the electrolytic solution, and a sealing body. The battery case has an outer diameter of 10 mm or less. The sealing body includes a ring having a through-hole and includes a sheet-like or film-like valve member disposed such that the valve member covers the through-hole of the ring, and a safety mechanism that causes the valve member to cleave when the internal pressure reaches a predetermined pressure is disposed therein. The ring includes protrusions formed of linear ridge lines that protrude toward an inside of the through-hole.