Embedded Fiber Optic Sensing System for Battery Packs

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Palo Alto, California
Project Term:
10/01/2012 - 03/06/2017

Technology Description:

Palo Alto Research Center (PARC) is developing new fiber optic sensors that would be embedded into batteries to monitor and measure key internal parameters during charge and discharge cycles. Two significant problems with today's best batteries are their lack of internal monitoring capabilities and their design oversizing. The lack of monitoring interferes with the ability to identify and manage performance or safety issues as they arise, which are presently managed by very conservative design oversizing and protection approaches that result in cost inefficiencies. PARC's design combines low-cost, embedded optical battery sensors and smart algorithms to overcome challenges faced by today's best battery management systems. These advanced fiber optic sensing technologies have the potential to dramatically improve the safety, performance, and life-time of energy storage systems.

Potential Impact:

If successful, PARC's compact fiber optic sensing system would actively assess the battery's state and health with high accuracy while in use to avoid degradation and/or failure during use. Additionally, the new system could help to reduce design oversizing by more than 25%, resulting in a significant reduction in the price of electrical energy storage systems.


Advances in energy storage management could reduce the cost and increase the adoption of electric vehicles and renewable energy storage technologies, which in turn would reduce our nation's dependence on foreign sources of energy.


Improving the reliability and safety of electric vehicles and renewable energy storage facilities would enable more widespread use of these technologies, resulting in a substantial reduction in carbon dioxide emissions.


Enabling alternatives to conventional sources of energy could insulate consumers, businesses, and utilities from unexpected price swings.


ARPA-E Program Director:
Dr. Patrick McGrath
Project Contact:
Ajay Raghavan
Press and General Inquiries Email:
Project Contact Email:


LG Chem Power, Inc.

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