Abstract: An aluminum wire with which, at the time of bonding a bonding wire for a power semiconductor, the wire is not detached from a wedge tool, and a long life is achieved in a power cycle test. The aluminum wire is made of an aluminum alloy having an aluminum purity of 99 mass % or more and contains, relative to a total amount of all elements of the aluminum alloy, a total of 0.01 mass % or more and 1 mass % or less of iron and silicon. In a lateral cross-section in a direction perpendicular to a wire axis of the aluminum wire, an orientation index of is 1 or more, an orientation index of is 1 or less, and an area ratio of precipitated particles is in a range of 0.02% or more to 2% or less.

Abstract: Disclosed is a coin battery including: a cylindrical battery can having a bottom portion, and a first side wall rising from the periphery of the bottom portion; a sealing plate having a top portion, and a second side wall extending from the periphery of the top portion along the inner side of the first side wall; a gasket interposed and compressed between the first side wall and the second side wall; and a power generation element sealed with the battery can and the sealing plate. In order to improve the battery capacity while ensuring leakage resistance, the second side wall is provided with a bulging portion bulging outward, and a part of the power generation element is disposed inside the bulging portion. The negative electrode is preferably in contact with the inner side of the bulging portion.

Abstract: A lithium primary battery includes a positive electrode, a negative electrode, a separator, a positive electrode case, a negative electrode case, a gasket, and a non-aqueous electrolyte. The negative electrode includes: lithium or a lithium alloy; a lithium carboxylate layer formed on a surface of the lithium or lithium alloy; and a carbon layer formed on a surface of the lithium carboxylate layer. This configuration allows the lithium primary battery to have suppressed negative electrode polarization during discharge and improved large-current discharge characteristics in a low temperature environment and after high temperature storage.

Abstract: A lithium primary battery includes a positive electrode, a negative electrode, a separator, a positive electrode case, a negative electrode case, a gasket, and a non-aqueous electrolyte. The negative electrode includes: lithium or a lithium alloy; a lithium carboxylate layer formed on a surface of the lithium or lithium alloy; and a carbon layer formed on a surface of the lithium carboxylate layer. This configuration allows the lithium primary battery to have suppressed negative electrode polarization during discharge and improved large-current discharge characteristics in a low temperature environment and after high temperature storage.