Battery and portable device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKiyoshi Hanafusa, Hiroichi Ishida
Life of this patent
Estimating the term…
Abstract
A battery (1, 11a to 11c, 31 to 36) includes a cylindrical or polygonal exterior can (2, 12); a safety valve (4, 14, 18, 19, 41 to 46) provided to the exterior can (2, 12) to reduce an internal pressure of the battery (1, 11a to 11c, 31 to 36). The exterior can (2, 12) includes: a relatively thick portion (2a, 2c, 12c) and a relatively thin portion (2d, 12d, 41a to 41c, 42a, 42b, 43a to 43d, 44a, 45a, 46a). The relatively thin portion (2d, 12d, 41a to 41c, 42a, 42b, 43a to 43d, 44a, 45a, 46a) constitutes the safety valve (4, 14, 18, 19, 41 to 46).
Claims5
A battery comprising:
- an exterior member of a tube-like shape;
- and
- a safety valve provided to said exterior member to reduce an internal pressure of said battery,
- wherein said exterior member includes a relatively thick portion and a relatively thin portion and said relatively thin portion constitutes said safety valve;
- wherein said exterior member is a one-piece, unitary structure having thin and thick portions;
- wherein said relatively thin portion is formed so as to surround part of said relatively thick portion;
- and wherein an electrode terminal is disposed on the exterior surface of said part of said relatively thick portion surrounded by said relatively thin portion.
A portable equipment comprising:
- a battery;
- and
- a body of said portable equipment to which said battery is mounted,
- wherein said battery includes:
- an exterior member of a tube-like shape and a safety valve provided to said exterior member to reduce an internal pressure of said battery, said exterior member includes a relatively thick portion and a relatively thin portion and said relatively thin portion constitutes said safety valve and said safety valve is located so as to face said body of said portable equipment;
- wherein said exterior member is a one-piece, unitary structure having thin and thick portions;
- wherein said relatively thin portion is formed so as to surround part of said relatively thick portion;
- and
- wherein an electrode terminal is disposed on the exterior surface of said part of said relatively thick portion surrounded by said relatively thin portion.
Dependencies are inferred from the claim text.