Panasonic Intellectual Property Management Co., Ltd.

Yuya Asano

Tomohiro Ueda

Haruhisa Yagi

Mitsuhiro Iseri

Yoko Sano

A thin battery includes a sheet-like electrode assembly; a non-aqueous electrolyte with which the electrode assembly is impregnated; and a housing in a sealed manner. The electrode assembly includes a pair of first electrodes located at an outermost side of the electrode assembly, a second electrode interposed between the pair of first electrodes, and a separator disposed between each first electrode and the second electrode. The first electrode includes a first current collector sheet and a first active material layer attached to one surface of the first current collector sheet. The second electrode includes a second current collector sheet and second active material layers attached to both surfaces of the second current collector sheet. A content x of the non-aqueous electrolyte per unit area of the first active material layer is larger than a content y of the non-aqueous electrolyte per unit area of the second active material layer.

Thin battery and battery-mounted device

A thin pouch battery, which is used as a power source of a portable electronic apparatus, a portable electronic terminal, or the like, includes protrusions, into which an electrode group is inserted, formed in both a laminate film on the upper side and a laminate film on the lower side. Then, concentrically concave and convex wave shapes (concentric crest ridges or trough furrows) are formed on the top surface of each of the protrusions such that the protrusion can extend or shrink in any direction, or the protrusion has a side surface that is gradually inclined and a wave shape is formed on the side surface of the protrusion.

Flexible battery

There is provided a pouch-type battery that includes an exterior packaging member having an accommodating space in which an electrode and an electrolyte are accommodated and which has a curved shape at least in a first direction. The exterior packaging member includes a first film member on which a cup section having the accommodating space inside is provided, a second film member disposed to face the first film member, and a sealing section around the cup section, with which the first and second film members are bonded to each other and the accommodating space is sealed. A top surface of the cup section of the first film member has a curved shape and is provided with a plurality of concave portions or convex portions, and the sealing section has a curved shape in the first direction and is configured of a flat surface on which neither concave portion nor convex portion is provided.

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Osaka, Japan

Yuya Asano