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US 7,410,724 B2Granted
Film packaged battery having a cupped portion
AssigneeNEC Corporation
InventorsHiroshi Yageta, Makihiro Otohata, Nobuaki Yoshioka
Life of this patent
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Abstract
A battery is fabricated on the basis of at least one of the following four concepts, i.e., lead terminals passing through a package not lower than the uppermost surface of an electrolyte cell, lead terminals projecting from a package in directions opposite to each other, a film package with a crushed portion expandable for accumulating gas and sheets of gas barrier sealant for keeping the boundaries between component parts of a package sealed; the seal is hardly broken so that the battery is durable and highly reliable.
Claims16
A film packaged battery comprising:
- a film package made of an expandable material and having a cup portion defining a space and a deformable portion expandable in a first direction, said deformable portion extending into said space when said space is lower in pressure than an ambience around said battery, and said deformable portion recovering to an initial shape when gas is generated in said package;
- an electrolyte cell having electrodes laminated in a second direction different from said first direction, received in said space and sealed in said film package, and
- terminals having respective inner portions electrically connected to said electrolyte cell and respective outer portions projecting to the outside of said film package.
A film packaged battery comprising:
- a film package made of an expandable material and having a cup portion defining a space, said cup having walls expandable in a first direction, said walls having an inwardly extending dent or bulge that extends into said space when said space is lower in pressure than an ambience around said battery and outwardly expands when the pressure in said space is higher than the pressure of said ambience;
- an electrolyte cell having laminated electrodes received in said space and sealed in said film package;
- and
- terminals having respective inner portions electrically connected to said electrolyte cell and respective outer portions projecting outside of said film package.
1 more element
Dependencies are inferred from the claim text.