Details

Autor(en) / Beteiligte

• Raghavan, Ajay
• Kiesel, Peter
• Sommer, Lars Wilko
• Schwartz, Julian
• Lochbaum, Alexander
• Hegyi, Alex
• Schuh, Andreas
• Arakaki, Kyle
• Saha, Bhaskar
• Ganguli, Anurag
• Kim, Kyung Ho
• Kim, ChaeAh
• Hah, Hoe Jin
• Kim, SeokKoo
• Hwang, Gyu-Ok
• Chung, Geun-Chang
• Choi, Bokkyu
• Alamgir, Mohamed

Titel

Embedded fiber-optic sensing for accurate internal monitoring of cell state in advanced battery management systems part 1: Cell embedding method and performance

Ist Teil von

• Journal of power sources, 2017-02, Vol.341 (C), p.466-473

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• A key challenge hindering the mass adoption of Lithium-ion and other next-gen chemistries in advanced battery applications such as hybrid/electric vehicles (xEVs) has been management of their functional performance for more effective battery utilization and control over their life. Contemporary battery management systems (BMS) reliant on monitoring external parameters such as voltage and current to ensure safe battery operation with the required performance usually result in overdesign and inefficient use of capacity. More informative embedded sensors are desirable for internal cell state monitoring, which could provide accurate state-of-charge (SOC) and state-of-health (SOH) estimates and early failure indicators. Here we present a promising new embedded sensing option developed by our team for cell monitoring, fiber-optic sensors. High-performance large-format pouch cells with embedded fiber-optic sensors were fabricated. The first of this two-part paper focuses on the embedding method details and performance of these cells. The seal integrity, capacity retention, cycle life, compatibility with existing module designs, and mass-volume cost estimates indicate their suitability for xEV and other advanced battery applications. The second part of the paper focuses on the internal strain and temperature signals obtained from these sensors under various conditions and their utility for high-accuracy cell state estimation algorithms. •Embedded battery sensors critical for accurate cell state, safer/fuller utilization.•Fiber-optic (FO) sensors presented as a promising new option in this regard.•Method for embedding FO sensors without affecting cell performance discussed.•Compatibility with pack designs, low cost will ease xEV, grid battery deployment.