NiCd-DataBattery Sizing Nickel CadmiumVoltage120VLOAD EXAMPLEMaximum Voltage140V15%Minimum Voltage105V12.50%Cell Voltage1.47V/Cell (for Satisfactory Charging)Cells=Maximum Voltage=140=95CellsEqualizing Voltage1.47EODV*)=Minimum Voltage=105=1.1052631579VCells95*) End Of Discharge VoltageBATTERY CAPACITY FACTOR CURVE

NiCd-KtBattery Sizing Calculation for Nickel Cadmium Battery (IEEE 1115)(Kt Capacity Factor, Based on 5 Hours AH)Lowest Electrolyte Temp0C32FEnd of Discharge Voltage1.10VPeriodPeriod No. & Load LoadDuration (Mins.)Time to End (Mins)Capacity (Kt) vs Time to EndTD (Temperature Derating)Required Size (Kt *TD*Load)+-If A2 is greater than A1 proceed to Period 21A13203200.080.080.561.37245.504245.5040Subtotal 1245.5040If A3 is greater than A2 proceed to Period 3002A100A200Subtotal 200If A4 is greater than A3 proceed to Period 4003A13203200.08601.611.17602.784602.7840A2100-22029.9259.921.61.17-411.840-411.84A328018030301.331.2287.28287.280Subtotal 3478.2240If A5 is greater than A4 proceed to Period 5004A13203200.081202.351.14857.28857.280A2100-22029.92119.922.341.14-586.8720-586.872A328018030901.951.15403.65403.650A4200-8060601.611.17-150.6960-150.696Subtotal 4523.3620If A6 is greater than A5 proceed to Period 6005A100A200A300A400A500Subtotal 500If A7 is greater than A61 proceed to Period 7006A13203200.08179.993.31.131193.281193.280A2100-22029.91179.913.291.13-817.8940-817.894A3280180301502.811.13571.554571.5540A4200-80601202.351.14-214.320-214.32A540-16059.42601.611.17-301.3920-301.392A6120800.580.580.681.3573.4473.440Subtotal 6504.6680If A8 is greater than A7 proceed to Period 8007A100A200A300A400A500A600A700Subtotal 70Random Equipment Only00RAR100100110.731.3598.5598.550Subtotal R98.55List of SubtotalsP1245.504P20P3478.224P4523.362P50P6504.668P70Maximum Subtotal523.362Random Section Size98.55Uncorrected Size621.912af = deEP OF DISCHARGECorrected Size = Uncorrected Size x T Design Margin x Aging FactorDM1.1AF1.25(performance starts to decline 80% from battery's lifetime)Corrected Size =855.13AHConnectedIsolated

LeadAcid-DataBattery Sizing Lead AcidLOAD EXAMPLEMaximum Voltage140VMinimum Voltage105VFloating Voltage2.25V/Cell (from manufacturer)Equalizing Voltage2.33V/Cell (from manufacturer)Case 1Battery and charger are continuously connected to the load.(Equalizing Voltage is used to determine Number of Cells)Cells=Maximum Voltage=140=60CellsEqualizing Voltage2.33EODV*)=Minimum Voltage=105=1.75VCells60*) End Of Discharge VoltageCase 2Battery and charger are isolated from the load(Floating Voltage is used to determine Number of Cells)Cells=Maximum Voltage=140=62CellsFloating Voltage2.25EODV*)=Minimum Voltage=105=1.6935483871VCells62*) End Of Discharge VoltageBATTERY CAPACITY FACTOR CURVE

LeadAcid-KtBattery Sizing Calculation for Lead Acid Battery (IEEE 485)(Kt Capacity Factor, Based on 8 Hours AH)Lowest Electrolyte Temp18.3CBattery&Charger to LoadConnectedEnd of Discharge Voltage1.75VPeriodPeriod No. & Load LoadDuration (Mins.)Time to End (Mins)Capacity (Kt) vs Time to EndRequired Size (Kt * Load)+-If A2 is greater than A1 proceed to Period 21A1320320110.77246.4246.40Subtotal 1246.40If A3 is greater than A2 proceed to Period 3002A100A200Subtotal 200If A4 is greater than A3 proceed to Period 4003A132032016026406400A2100-22029592-4400-440A328018030301.44259.2259.20Subtotal 3459.20If A5 is greater than A4 proceed to Period 5004A132032011202.91931.2931.20A2100-220291192.91-640.20-640.2A328018030902.46442.8442.80A4200-8060602-1600-160Subtotal 4573.80If A6 is greater than A5 proceed to Period 6005A100A200A300A400A500Subtotal 500If A7 is greater than A61 proceed to Period 7006A132032011803.721190.41190.40A2100-220291793.72-818.40-818.4A3280180301503.33599.4599.40A4200-80601202.91-232.80-232.8A540-16059602-3200-320A612080110.7761.661.60Subtotal 6480.20If A8 is greater than A7 proceed to Period 8007A100A200A300A400A500A600A700Subtotal 70Random Equipment Only00RAR100100110.7777770Subtotal R77List of SubtotalsP1246.4P20P3459.2P4573.8P50P6480.2P70Maximum Subtotal573.8Random Section Size77Uncorrected Size650.8Corrected Size = Uncorrected Size x Temperature Correction x Design Margin x Aging FactorTC1.08(from Table 1 IEEE 485)DM1.15AF1.25(performance starts to decline 80% from battery's lifetime)Corrected Size =1010.37AHConnectedIsolated

LeadAcid-RtBattery Sizing Calculation (IEEE 485)(Rt Capacity Factor, Based on 8 Hours AH)Lowest Electrolyte Temp18.3CBattery&Charger to LoadConnectedEnd of Discharge Voltage1.75VPeriodPeriod No. & Load LoadDuration (Mins.)Time to End (Mins)Capacity (Rt)Required Size (load/Rt)+-If A2 is greater than A1 proceed to Period 21A1320320111043.07692307693.07692307690Subtotal 13.07692307690If A3 is greater than A2 proceed to Period 3002A100A200Subtotal 200If A4 is greater than A3 proceed to Period 4003A132032016040880A2100-220295940-5.50-5.5A3280180303055.43.24909747293.24909747290Subtotal 35.74909747290If A5 is greater than A4 proceed to Period 5004A1320320112027.511.636363636411.63636363640A2100-2202911927.5-80-8A3280180309032.55.53846153855.53846153850A4200-80606040-20-2Subtotal 47.17482517480If A6 is greater than A5 proceed to Period 6005A100A200A300A400A500Subtotal 500If A7 is greater than A61 proceed to Period 7006A1320320118021.514.883720930214.88372093020A2100-2202917921.5-10.23255813950-10.2325581395A328018030150247.57.50A4200-806012027.5-2.90909090910-2.9090909091A540-160596040-40-4A612080111040.76923076920.76923076920Subtotal 66.01130265080If A8 is greater than A7 proceed to Period 8007A100A200A300A400A500A600A700Subtotal 70Random Equipment Only00RAR100100111040.96153846150.96153846150Subtotal R0.9615384615List of SubtotalsP13.0769230769P20P35.7490974729P47.1748251748P50P66.0113026508P70Maximum Subtotal7.1748251748Random Section Size0.9615384615Uncorrected Size8.1363636364Corrected Size = Uncorrected Size x Temperature Correction x Design Margin x Aging FactorTC1.08(from Table 1 IEEE 485)DM1.15AF1.25(performance starts to decline 80% from battery's lifetime)Corrected Size =12.63Plates.ConnectedIsolated

ComparisonBattery Sizing Calculation for Lead Acid Battery (IEEE 485)(Kt Capacity Factor, Based on 8 Hours AH)Lowest Electrolyte Temp18.3CBattery&Charger to LoadConnectedEnd of Discharge Voltage1.75VPeriodPeriod No. & Load LoadDuration (Mins.)Time to End (Mins)Capacity (Kt) vs Time to EndRequired Size (Kt * Load)+-If A2 is greater than A1 proceed to Period 21A1320320110.77246.4246.40Subtotal 1246.40If A3 is greater than A2 proceed to Period 3002A100A200Subtotal 200If A4 is greater than A3 proceed to Period 4003A132032016026406400A2100-22029592-4400-440A328018030301.44259.2259.20Subtotal 3459.20If A5 is greater than A4 proceed to Period 5004A132032011202.91931.2931.20A2100-220291192.91-640.20-640.2A328018030902.46442.8442.80A4200-8060602-1600-160Subtotal 4573.80If A6 is greater than A5 proceed to Period 6005A100A200A300A400A500Subtotal 500If A7 is greater than A61 proceed to Period 7006A132032011803.721190.41190.40A2100-220291793.72-818.40-818.4A3280180301503.33599.4599.40A4200-80601202.91-232.80-232.8A540-16059602-3200-320A612080110.7761.661.60Subtotal 6480.20If A8 is greater than A7 proceed to Period 8007A100A200A300A400A500A600A700Subtotal 70Random Equipment Only00RAR100100110.7777770Subtotal R77List of SubtotalsP1246.4P20P3459.2P4573.8P50P6480.2P70Maximum Subtotal573.8Random Section Size77Uncorrected Size650.8Corrected Size = Uncorrected Size x Temperature Correction x Design Margin x Aging FactorTC1.08(from Table 1 IEEE 485)DM1.15AF1.25(performance starts to decline 80% from battery's lifetime)Corrected Size =1010.37AHBattery Sizing Calculation for Nickel Cadmium Battery (IEEE 1115)(Kt Capacity Factor, Based on 5 Hours AH)Lowest Electrolyte Temp0C32FEnd of Discharge Voltage1.10VPeriodPeriod No. & Load LoadDuration (Mins.)Time to End (Mins)Capacity (Kt) vs Time to EndTD (Temperature Derating)Required Size (Kt *TD*Load)+-If A2 is greater than A1 proceed to Period 21A1320320110.751.43363360Subtotal 13360If A3 is greater than A2 proceed to Period 3002A100A200Subtotal 200If A4 is greater than A3 proceed to Period 4003A13203201601.91.257607600A2100-22029591.91.25-522.50-522.5A328018030301.51.33513510Subtotal 3588.50If A5 is greater than A4 proceed to Period 5004A132032011202.41.2921.6921.60A2100-220291192.41.2-633.60-633.6A3280180309021.22439.2439.20A4200-8060601.91.25-1900-190Subtotal 4537.20If A6 is greater than A5 proceed to Period 6005A100A200A300A400A500Subtotal 500If A7 is greater than A61 proceed to Period 7006A1320320118031.1105610560A2100-2202917931.1-7260-726A3280180301502.851.1564.3564.30A4200-80601202.41.2-230.40-230.4A540-16059601.91.25-3800-380A612080110.751.484840Subtotal 6367.90If A8 is greater than A7 proceed to Period 8007A100A200A300A400A500A600A700Subtotal 70Random Equipment Only00RAR100100110.751.35101.25101.250Subtotal R101.25List of SubtotalsP1336P20P3588.5P4537.2P50P6367.9P70Maximum Subtotal588.5Random Section Size101.25Uncorrected Size689.75Corrected Size = Uncorrected Size x Temperature Correction x Design Margin x Aging FactorDM1.1AF1.25(performance starts to decline 80% from battery's lifetime)Corrected Size =948.41AHConnectedIsolated