Abstract
Small DC-coupled battery test systems are deployed at NREL to evaluate capacity fade models and report on performance parameters such as round-trip efficiency under indoor and outdoor deployment scenarios. Initial commercial battery products include LG Chem RESU Lithium-ion and Avalon vanadium-redox flow batteries. Adapting indoor lab-scale test methods to outdoor systems has challenges, including maintaining constant temperature and fully controlling batteries through standard discharge curves. Initial measurements show the Lithium Ion battery systems performing within expectation, near 85% round-trip efficiency. Initial lifetime modeling and measurements indicate battery capacity may degrade by 20%-35% over 10 years at current rates.
Original language | American English |
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Number of pages | 8 |
State | Published - 2019 |
Event | 46th IEEE Photovoltaic Specialists Conference (PVSC 46) - Chicago, Illinois Duration: 16 Jun 2019 → 21 Jun 2019 |
Conference
Conference | 46th IEEE Photovoltaic Specialists Conference (PVSC 46) |
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City | Chicago, Illinois |
Period | 16/06/19 → 21/06/19 |
Bibliographical note
See NREL/CP-5K00-76288 for paper as published in IEEE proceedingsNREL Publication Number
- NREL/CP-5K00-74003
Keywords
- battery
- capacity fade
- field testing
- li-ion lithium ion