Abstract

Lithium-ion batteries (LiBs) have seen increasing use in automobiles and buildings over the past decade. Usable lifetimes of several years are sufficient for LiBs used in electronic devices, but infrastructure applications require lifetimes measured in decades. Users of LiBs are faced with uncertainty about LiB lifetimes, which hinders the spread of LiBs. Predicting LiB performance degradation and evaluating useful lifetimes by examining present performance is therefore important for planning. Our research group has developed an evaluation model for LiBs that comprises an empirically obtained degradation speed database and a method for recognizing LiB usage patterns.

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