Samlexpower PST-300-12 Owner's manual - Section 7 |
16 | SAMLEX AMERICA INC.
seCtIOn 7 |
General Information on Batteries for
Powering Inverters
typical Battery Sizes
TheTable7.1belowshowsdetailsofsomepopularbatterysizes:
tABLe 7.1: PoPULAR BAtteRY SiZeS
Bci* Group
Battery Voltage, V
Battery capacity, Ah
27/31
12
105
4D
12
160
8D
12
225
GC2**
6
220
*BatteryCouncilInternational;**GolfCart
Specifying charging / Discharging currents: c-Rate
Electricalenergyisstoredinacell/batteryintheformofDCpower.Thevalueofthe
stored energy is related to the amount of the active materials pasted on the battery
plates,thesurfaceareaoftheplatesandtheamountofelectrolytecoveringtheplates.
Asexplainedabove,theamountofstoredelectricalenergyisalsocalledtheCapacityof
thebatteryandisdesignatedbythesymbol“C”.
ThetimeinHoursoverwhichthebatteryisdischargedtothe“EndPointVoltage”for
purposesofspecifyingAhcapacitydependsuponthetypeofapplication.Letusdenote
thisdischargetimeinhoursby“T”.Letusdenotethedischargecurrentofthebattery
asthe“C-Rate”.Ifthebatterydeliversaveryhighdischargecurrent,thebatterywillbe
dischargedtothe“EndPointVoltage”inashorterperiodoftime.ontheotherhand,
ifthebatterydeliversalowerdischargecurrent,thebatterywillbedischargedtothe
“EndPointVoltage”afteralongerperiodoftime.Mathematically:
eQUAtion 1:
Discharge current “c-Rate” = capacity “c” in Ah ÷ Discharge time “t”