Method for monitoring/managing electrochemical energy device by detecting intercalation stage changes

US9583796B2 · kind B2 · utility

Assignee

• Palo Alto Research Center Incorporated · US

Inventors

• Bhaskar Saha · Redwood City, US
• Ajay Raghavan · Mountain View, US
• Peter Kiesel · Palo Alto, US
• Lars Wilko Sommer · Bretten, DE
• Alexander Lochbaum · Landau, DE
• Tobias Staudt · Palo Alto, US
• Saroj Kumar Sahu · Tracy, US
• Anurag Ganguli · Saratoga, US

Key dates

• Filing date: Apr 1, 2014
• Grant date: Feb 28, 2017
• Expiry date: Aug 27, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A method for determining an operating state (e.g., state-of-charge or state-of-health) and/or generating management (charge/discharge) control information in a system including an electrochemical energy device (EED, e.g., a rechargeable Li-ion battery, supercapacitor or fuel cell) that uses optical sensors to detect the intercalation stage change events occurring in the EED. The externally or internally mounted optical sensors measure operating parameter (e.g., strain and/or temperature) changes of the EED during charge/recharge cycling, and transmit measured parameter data using light signals sent over optical fibers to a detector/converter. A processor then analyzes the measured parameter data, e.g., using a model-based estimation process, to detect intercalation stage changes (i.e., crystalline structure changes caused by migration of guest species, such as Li-ions, between the EED's anode and cathode), and generates the operating state and charge/discharge control information based the analysis.