US 8,945,761 B2Granted

Battery

AssigneeGS Yuasa International Ltd.

InventorsIsao Suzuki, Takeshi Nakamoto, Syun Ito, Shogo Waki

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Abstract

A battery includes current collectors for electrically connecting a power generating element contained inside of a battery case to external terminals, respectively. A caulking head of a rivet for fixing the negative current collector to a cover is contained in a engagement recess which is a space inside of a engagement receiving portion in the cover. The positive current collector is caulked to the cover via a shaft of the positive external terminal. A caulking head at a tip end of the shaft is contained in the engagement recess which is a space defined inside of the engagement receiving portion. The caulking heads do not project from a lower surface of the cover, and therefore, a clearance space defined between the power generating element and the cover is set to the minimum.

Claims19

Dependent claims

A battery, comprising:

a battery case which contains a power generating element therein and whose top surface is opened;
a cover which covers the top surface of the battery case and includes an expanding portion that is formed as a part of the cover expanding upward from an upper surface of the cover, a bottom surface of the cover being formed with a recess that includes a space inside of the expanding portion;
an external terminal, at least part of the external terminal being disposed outside of the cover;
a current collector which electrically connects the power generating element to the external terminal, the current collector comprising a base and a leg, the base comprising a caulked portion, the leg being connected to the power generating element;
and
a joining member which fixes the caulked portion to the cover,
wherein the caulked portion and a head of the joining member are contained in the recess, and
wherein the head of the joining member caulks the caulked portion for fixing the current collector to the cover.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/316,266Filed 9 Dec 2011
Priority: JP 2010-27631010 Dec 2010
Published: US 2012/0148911 A114 Jun 2012
Granted: 3 Feb 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H01M 10/0431
Construction or manufacture in general: cells with wound or folded electrodes
H01M 50/147
Primary casings; Jackets or wrappings: lids or covers
H01M 50/15
Characterised by their shape: for prismatic or rectangular cells
H01M 50/169
Characterised by the methods of assembling casings with lids: by welding, brazing or soldering