IP Library › Granted Patent US 7,029,790
Granted Patent B2
US 7,029,790 · App. 10/308,035 · Granted Apr 18, 2006

Closed type battery

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Quick Facts
Patent No.
US 7,029,790
App. No.
10/308,035
Granted
Apr 18, 2006
Kind
B2
Abstract

The invention provides a closed type battery comprising an electrode-leading terminal formed by caulking that ensures satisfactory sealing sealability. That terminal comprising a metal plate for sealing up an opening in a battery can, an insulating member that cover a through-hole provided through the metal plate and both surfaces of the metal plate around the through-hole, an electrode-drawing sheet positioned on a surface of the insulating member located on an outer surface of a battery and an electrode-leading pin that is inserted into the through-hole in the electrode-drawing sheet and caulked from above and below. At the surface of contact of a flange of the electrode-leading pin with the insulating member there is provided at least a projection.

Claims (7)

1. A closed type battery having an electrode terminal comprising a metal plate for sealing up an opening in a battery can, an insulating member that cover a through-hole provided through the metal plate and both surfaces of the metal plate around the through-hole, an electrode-drawing sheet positioned on a surface of the insulating member located on an outer surface of the battery and an electrode-leading pin that is inserted into the through-hole in the electrode-drawing sheet and caulked from above and below, wherein:

at a surface of contact of a flange of the electrode-leading pin with said insulating member there is provided at least a projection and a recess, said projection having an acute tip and said recess being acute at a deepest portion.

2. The closed type battery according to claim 1 , wherein said recess is located at a position nearer to a center of a shaft of said electrode-leading pin.

3. The closed type battery according to claim 1 , wherein said projection is configured in a ring form.

4. The closed type battery according to claim 1 , wherein said projection and recess are each configured in a ring form.

5. The closed type battery according to claim 1 , wherein said projection and recess are each configured in a ring form, and said recess is located at a position nearer to a center of a shaft of said electrode-leading pin.

6. The closed type battery according to claim 1 , which is a lithium ion battery.

Assignments (5)
RELEASE OF SECURITY INTEREST Recorded Oct 28, 2024
From: SUMITOMO MITSUI BANKING CORPORATION, AS SECURITY AGENT
To: ENVISION AESC JAPAN LTD.; ENVISION AESC ENERGY DEVICES LTD.
Reel/Frame 069461/0179 →
SECURITY AGREEMENT SUPPLEMENT Recorded Jul 2, 2019
From: ENVISION AESC ENERGY DEVICES, LTD.
To: SUMITOMO MITUSI BANKING CORPORATION, AS SECURITY AGENT
Reel/Frame 049649/0924 →
CHANGE OF NAME Recorded Jun 21, 2019
From: NEC ENERGY DEVICES, LTD.
To: ENVISION AESC ENERGY DEVICES, LTD.
Reel/Frame 049556/0123 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 24, 2010
From: NEC TOKIN CORPORATION
To: NEC ENERGY DEVICES, LTD.
Reel/Frame 025041/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 3, 2002
From: MIZUNO, HIROYUKI; HANAFUSA, HIROSHI; OGAKU, TETSUHIRO; HIRANO, KIKUO; HORIUCHI, JOTARO
To: NEC TOKIN TOCHIGI, LTD.
Reel/Frame 013541/0034 →