Application Note CC-001
77
Part of this belief that a straight line cannot describe a capacity
relationship is rooted in the differences exhibited during battery
discharges from cells with metallic vs. electrochemical resistance
problems. The typical discharge curve of a cell at 100% capacity is
shown in Figure 4.
A battery's capacity is adversely affected by
an increased
internal
resistance. Obviously, the power is dissipated internally, I
2
x R
INTERNAL
,
and is not available where it is really needed . . . at the load. Thus,
actual
capacity is diminished. However, during
discharge
this reduction in
capacity appears differently depending upon whether the resistance
change is primarily metallic or electrochemical in nature.
