US 2011/0256444 A1Published application

Secondary battery having third terminal in addition to positive and negative electrode terminals and storage battery using the same

AssigneeNEC Corporation

InventorsHiroshi KANETA, Chika KANBE

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Abstract

A secondary battery in which temperature rise (heat generation) can be measured accurately at the time of quick charge/discharge, and a battery which can be configured readily using the secondary batteries while realizing low resistance. Separately from the positive and negative electrode terminals of a flat laminate film secondary battery, a third terminal is fixed perpendicularly thereto. The third terminal is connected with the electrode current collecting parts of a power generating element body constituting the secondary battery (1) and imparted with a potential equal to that of any one of the positive and negative electrode terminals. Inner temperature of the secondary battery is determined by measuring the temperature of the third terminal and a cell balancer circuit, or the like, is connected with the third terminal. The battery is configured by connecting the positive and negative electrode terminals directly in series.

Claims3

Dependent claims

A flat secondary battery comprising:

an electric-power generating element provided with positive and negative electrode collectors, each of said collectors having a respective uncoated area that is free of active material;
positive and negative electrode terminals for charge and discharge and that are attached to said uncoated areas of said positive and negative electrode collectors, respectively;
and
third terminal that is attached directly to said uncoated area of one of said positive and negative electrode collectors and that does not directly contact either of said positive and negative electrode terminals,
wherein said third terminal and a respective one of said positive and negative electrode terminals are attached to said uncoated area of said positive and negative electrode collectors at different positions,
wherein said third terminal has a same electric potential as said respective one of said positive and negative electrode terminals and said third terminal is attached electrically and conductively to said uncoated area of said one of said positive and negative electrode collectors,
wherein said third terminal connects to a cell balancer circuit, and
wherein one of said positive and negative electrode terminals, that is attached to said uncoated area that is attached with said third terminal, is not connected to said cell balancer circuit.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/167,436Filed 23 Jun 2011
Priority: JP 2002-12263824 Apr 2002
Published: 20 Oct 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H01M 10/0436
Construction or manufacture in general: small-sized flat cells or batteries for portable equipment
H01M 50/105
Characterised by their shape or physical structure: pouches or flexible bags
H01M 50/548
Characterised by the disposition of the terminals on the cells: on opposite sides of the cell
H01M 50/55
Characterised by the disposition of the terminals on the cells: on the same side of the cell

Family

Application10/505,417Division · filed 24 Aug 2004
Application13/167,436Division
US 2005/0130037 A1Published application
US 8,017,260 B2Related patent
US 2011/0256444 A1This patent

From the US filing history. Foreign family members aren’t listed.