If a battery
of
open-circuit
voltage EB
has a loaded
voltage VL
when
supplying
load current
IL,
the battery
internal
resistance
RB
is:
RB
= (EB
- VL)
/ IL
The load
voltage VL
and load
current IL
for a load
resistance
RL
are:
VL
= ILRL
= EB
- ILRB
= EBRL
/ (RB
+ RL)
IL
= VL
/ RL
= (EB
- VL)
/ RB
= EB
/ (RB
+ RL)
The battery
short-circuit
current Isc
is:
Isc
= EB
/ RB
= EBIL
/ (EB
- VL)
