INFLEX

Charging process finishes when a inflexion point is detected (10 to 20% earlier than –dV occurs). At this point temperature of charged battery begins to rise very quickly. All the energy after inflexion point appears is lost into heat and further charging does not result in increasing capacity of the battery.

Vertical line on a current graph (blue line) – inflexion point marker

Start temperature - 28

Inflexion point temperature - 33

-dV temperature - 40