Flywheel design challenges batteries

摘要

Cambridge, MA—Cable TV companies and telephone companies typically provide the backup power needed to maintain service for their customers with valve-regulated lead-acid (VRLA) batteries. Designed to function at 77F, the batteries experience a reduction of 50% in usable life for every 15F rise in operating temperature. Batteries present environmental problems and require on-site monitoring and regular maintenance to function properly. Despite their technical maturity and relatively low acquisition cost, VRLA batteries can prove short-lived and expensive to maintain in many regions of the U.S.