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US 2012/0231328 A1Published application
Cylindrical battery and gasket for use in same
AssigneeFDK Energy Co., Ltd.
InventorsTatsuya Yamazaki, Shuji Murakami, Hidenori Tsuzuki
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AssigneeFDK Energy Co., Ltd.
InventorsTatsuya Yamazaki, Shuji Murakami, Hidenori Tsuzuki
Estimating the term…
A cylindrical battery gasket that will not functionally deteriorate in absorbing stress caused by the gasket extending radially upon the battery being sealed is provided with a boss part (32) with a central hole 31 through which a negative electrode collector 22 is inserted, a canister contact part 33 that is affixed in place and in contact with a cathode canister 11, a disk-shaped part 34 that is provided to connect the boss part 32 to the canister contact part 33, and a stress buffering part 37 that is provided on the way to the disk-shaped part 34. The stress buffering part 37 has a first bent part 37a and a second bent part 37b, both of an acute angle, and is set nearer the center of the cathode canister 11 than to the positive electrode mixture 12, upon the gasket being installed in the cathode canister 11.
A cylindrical battery gasket for sealing the opening of a cylindrical battery canister, comprising a boss part with a central hole through which a negative-electrode collector is inserted, and a canister-contact part touching the inner side of the aforementioned opening, upon the battery canister being sealed, and a disk-shaped part extending radially from the outer periphery of the boss part, connecting the boss part to the canister-contact part, and a bent stress-buffering part, along the way to the disk-shaped part, which absorbs the radial distortion of the gasket upon the battery canister being sealed, whereof the aforementioned stress-buffering part, of two or more sharply-angled bent parts, is nearer the center of the battery than to the positive electrode mixture, upon the battery canister being sealed by the gasket.
A cylindrical battery gasket, according to claim (1), above, characterized by a stress-buffering part comprising a first bent part, convexly formed within the battery canister, and a second bent part, concavely formed within the battery canister, which is nearer the periphery of the gasket than to the first bent part.
Dependencies are inferred from the claim text.