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ACEP has been involved with flow battery testing for several years, including a performance test of a 10 kW vanadium redox flow battery (2006 – 2009). This unit was supplied by VRB, then a Canadian company. Fig. 8. The 10 kW VRB battery that was tested at ACEP Lab between 2006 and 2009. During the test period for the VRB battery, several issues were identified that were a cause for concern for this battery technology. A full report is available12, but identified failure mechanisms were: • “Balance of plant” failures. Two pumps, electrical contacts, computer hardware, leaky fittings and leaky tanks – all of which caused the unit to stop running. Some of these issues could be resolved with better selection of components. • Stack failures. Though a fundamental flaw for this technology, these were not unexpected given the parent company’s commitment to finding low cost materials for their manufacture (VRB announced that it intended to manufacture these units from commercially available off the shelf components, using materials of standard commercial purity.) 12 Dennis Witmer, “VRB Vanadium redox battery testing at UAF,” ACEP Report, June 2009. Available online: http://www.uaf.edu/acep/publications/ ADVANCED ENERGY STORAGE RESEARCH 12 | A C E P ACEP 12-03 | March 2012 Previous WorkPDF Image | Advanced Battery Storage Systems Testing at ACEP VRB ESS
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