Technical FAQs 4

How important is safety advice for a vanadium flow battery?

As the global installed energy capacity of vanadium flow battery systems increases, it becomes increasingly important to have tailored standards offering specific safety advice.

Does a flow battery system need a mixed electrolyte test?

A flow battery system is not subjected to any further tests if at least one of the following two conditions are met: UL 9540A also requires that the test report state an RFB’s compliance with UL 1973. The mixed electrolyte test is most similar to two failure modes in an RFB stack: membrane rapture and electrolyte failure.

Are redox flow batteries safe?

Herein, the current landscape of redox flow batteries (RFB) safety is reviewed through: Vanadium RFBs (VRFBs) have achieved the highest degree of commercialization of all RFB chemistries and thus most of the tested RFBs are VRFBs.

Is electrolyte flammability a ul 9540a fire risk?

Ultimately, the focus on electrolyte flammability as the sole source of risk in UL 9540A tests for RFBs is inadequate. A more comprehensive view of RFB fire risks could be achieved by characterizing the fire risks of the other RFB components which have demonstrated high combustibility and would present a safety hazard in case of external fires.

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