Battery management based on internal optical sensing

US9553465B2 · kind B2 · utility

Assignee

• Palo Alto Research Center Incorporated · US

Inventors

• Ajay Raghavan · Mountain View, US
• Peter Kiesel · Palo Alto, US
• Alexander Lochbaum · Landau, DE
• Bhaskar Saha · Redwood City, US
• Lars Wilko Sommer · Bretten, DE
• Tobias Staudt · Palo Alto, US

Key dates

• Filing date: Apr 21, 2014
• Grant date: Jan 24, 2017
• Expiry date: Jun 14, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A battery management system includes one or more fiber optic sensors configured to be disposed within an electrochemical battery. Each fiber optic sensor is capable of receiving input light and providing output light that varies based on the input light and an amount of free or dissolved gas present within the battery. A detector detects the output light and generates an electrical detector signal in response to the output light. Battery management circuitry determines the state of the battery based at least in part on the detector signal.