Advanced lithium ion battery charger

Abstract

A lithium-ion battery charger has been developed for four and eight cell batteries or multiples thereof. This charger has the advantage over those using commercial lithium-ion charging chips in that the individual cells are allowed to be taper charged at their upper charging voltage rather than be cut-off when all cells of the string have reached the upper charging voltage limit. Since 30-60% of the capacity of lithium-ion cells maybe restored during the taper charge, this charger has the distinct benefit of fully charging lithium ion-batteries by restoring all of the available capacity to all of its cells.