US 8,541,122 B2Granted

Lithium rechargeable cell with reference electrode for state of health monitoring

AssigneeA123 Systems, Inc.

InventorsRicardo Fulop, Yet-Ming Chiang, Karen E. Thomas-Alyea, William H. Gardner

Life of this patent

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Abstract

A battery management system includes one or more lithium ion cells in electrical connection, each said cell comprising: first and second working electrodes and one or more reference electrodes, each reference electrode electronically isolated from the working electrodes and having a separate tab or current collector exiting the cell and providing an additional terminal for electrical measurement; and a battery management system comprising a battery state-of-charge monitor, said monitor being operable for receiving information relating to the potential difference of the working electrodes and the potential of one or more of the working electrodes versus the reference electrode.

Claims19

Dependent claims

A battery, comprising:

first and second working electrodes separated by at least one separator, the first working electrode in electrical connection with a first terminal, and the second working electrode in electrical connection with a second terminal;
one or more reference electrodes;
and
a can housing the working electrodes and the one or more reference electrodes, wherein the can is electrically isolated from the first and second terminals and the one or more reference electrodes are integral to the can so that the can is electrically connected to the one or more reference electrodes to provide terminals for the one or more reference electrodes with the exterior of the can, and exposed metal surfaces of the can are coated with a nonporous electrically insulating coating.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/448,999Filed 17 Apr 2012 · continuation
Priority: 14 Sep 2007
Published: US 2012/0263986 A118 Oct 2012
Granted: 24 Sep 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

H01M 10/0525
Li-accumulators: rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
G01R 31/54
Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections: testing…
H01M 10/425
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: structural combination with electronic…
H01M 10/44
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: methods for charging or discharging

Family

Application60/993,802Us provisional application · filed 14 Sep 2007
Application60/994,089Us provisional application · filed 17 Sep 2007
Application12/210,812Parent of this continuation · filed 15 Sep 2008
US 2012/0263986 A1Pre-grant publication · published 18 Oct 2012
US 8,163,410 B2Parent of this continuation
US 2009/0104510 A1Published application
US 8,541,122 B2This patent

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

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