Design of a sensitivity-enhanced FBG strain sensor and its application in state estimation for lithium-ion battery

Jun Peng; Xing Zhou; Shuhai Jia; Shouping Xu; Jizhong Chen

doi:10.1117/12.2539787

18 December 2019 Design of a sensitivity-enhanced FBG strain sensor and its application in state estimation for lithium-ion battery

Jun Peng, Xing Zhou, Shuhai Jia, Shouping Xu, Jizhong Chen

Author Affiliations +

Proceedings Volume 11340, AOPC 2019: Optical Fiber Sensors and Communication; 113400A (2019) https://doi.org/10.1117/12.2539787
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

Lithium-ion batteries have become a most promising energy storage candidate in power station and electric vehicles because of its high power capability, high energy-conversion efficiency, and environmental friendliness. It is significant to diagnose the security of battery by monitoring the its state parameters. Wherein, temperature and strain are the two of the important ones. In this work, a sensitivity-enhanced FBG strain sensor was designed for the strain measurement of lithium-ion batteries. This proposed sensor consists of two FBGs and a lever mechanism. The lever mechanism works as a displacement amplifier. The amplified deformation of battery act on the functional FBG and induce the larger wavelength shift. The thermal compensation FBG can eliminate the influence of ambient temperature. The calibration test shows that this sensor has a high sensitivity of 11.55 pm/με and a good linearity. Application test on a battery illustrates that the strain responses of the sensor has a good repeatability in three cycles. Then, artificial neural networks were used for state of charge (SOC) estimation. When the strain and temperature data were set as input parameters, SOC can be well predicted. Therefore, this sensor can monitor the strain on the cell with high sensitivity and accuracy. This research demonstrated a new solution for SOC estimation especially based on strain signals, which can provide more informative data for battery management system.

Citation Download Citation

Jun Peng, Xing Zhou, Shuhai Jia, Shouping Xu, and Jizhong Chen "Design of a sensitivity-enhanced FBG strain sensor and its application in state estimation for lithium-ion battery", Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 113400A (18 December 2019); https://doi.org/10.1117/12.2539787

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available