APPLICATION NOTE
6
Figure 3:NICD battery discharge models
Using the Discharge Models
To use the battery models in a simulation, add the required number of cells to the circuit file, and pass the
appropriate parameters to the subcircuit model. The manufacturers' data sheets may be consulted for information
on the cell parameters shown in Table 1.
Table 1 Cell Parameters
Cell Model Parameter Meaning
ALKALINE
CAPACITY
Capacity of the cell measured at greater than 100 hour
discharge time
RESISTANCE Initial cell resistance in ohms
9V ALKALINE
No parameters are needed for a generic 9 Volt
Alkaline battery
NICKELCADMIUM
CAPACITY
Amp-hour capacity of cell measured at the C/5 rate
RESISTANCE Mid-discharge cell resistance in ohms
CELLTEMP
1
Initial cell temperature at start of simulation
VOLUME
1
Volume of cell in cubic inches
WT
1
The weight of the cell in grams
NICKEL METAL
HYDRIDE
CAPACITY
Amp-hour capacity of cell measured at the C/5 rate
RESISTANCE Mid-discharge cell resistance in ohms
