Cell Specifications

Nominal Voltage:
Chemistry:
Full Charge Voltage:
Full Discharge Voltage:
Capacity:
Max Continuous Charge: A
Max Continuous Discharge: A

Calculate Your Battery Pack

Desired Total Voltage (V):
Desired Power:
Watts (W)
Kilowatts (kW)

Desired Energy:
Watt-hours (Wh)
Kilowatt-hours (kWh)

function detectBatteryChemistry(nominalVoltage) {
if (nominalVoltage >= 3.6 && nominalVoltage = 3.2 && nominalVoltage <= 3.3) {
return {chemistry: LiFePO4 , fullChargeVoltage: 3.65, fullDischargeVoltage: 2.5};
} else if (nominalVoltage === 2.2) {
return {chemistry: LTO , fullChargeVoltage: 2.8, fullDischargeVoltage: 1.5};
} else if (nominalVoltage === 3.0) {
return {chemistry: Sodium Ion , fullChargeVoltage: 4.0, fullDischargeVoltage: 2.0};
} else {
return {chemistry: Unknown , fullChargeVoltage: nominalVoltage, fullDischargeVoltage: nominalVoltage};
}
}

function formatCapacity(capacity) {
var capacityInAh = capacity 1000;
if (capacityInAh % 1 === 0) {
return capacityInAh.toString() + Ah ;
} else {
return capacityInAh.toFixed(1) + Ah ;
}
}

function initialize() {
var nominalVoltage = parseFloat(document.getElementById( nominalVoltage ).value);
var capacity = parseFloat(document.getElementById( capacity ).value);
var maxCharge = parseFloat(document.getElementById( maxCharge ).value);
var maxDischarge = parseFloat(document.getElementById( maxDischarge ).value);
var batteryDetails = detectBatteryChemistry(nominalVoltage);
document.getElementById( cellVoltage ).textContent = nominalVoltage + V ;
document.getElementById( cellChemistry ).textContent = batteryDetails.chemistry;
document.getElementById( cellFullChargeVoltage ).textContent = batteryDetails.fullChargeVoltage + V ;
document.getElementById( cellFullDischargeVoltage ).textContent = batteryDetails.fullDischargeVoltage + V ;
document.getElementById( cellCapacity ).textContent = formatCapacity(capacity);
document.getElementById( cellMaxCharge ).textContent = maxCharge.toString();
document.getElementById( cellMaxDischarge ).textContent = maxDischarge.toString();
}

function calculatePackConfiguration() {
var nominalVoltage = parseFloat(document.getElementById( nominalVoltage ).value);
var capacity = parseFloat(document.getElementById( capacity ).value);
var maxCharge = parseFloat(document.getElementById( maxCharge ).value);
var maxDischarge = parseFloat(document.getElementById( maxDischarge ).value);

var desiredVoltage = parseFloat(document.getElementById( desiredVoltage ).value);
var powerUnit = document.getElementById( powerUnit ).value;
var desiredWatts = parseFloat(document.getElementById( desiredWatts ).value);
if (powerUnit === kW ) {
desiredWatts *= 1000;
}

var energyUnit = document.getElementById( energyUnit ).value;
var desiredWattHours = parseFloat(document.getElementById( desiredWattHours ).value);
if (energyUnit === kWh ) {
desiredWattHours *= 1000;
}

var cellsInSeries = Math.ceil(desiredVoltage nominalVoltage);
var wattCellsInParallel = Math.ceil(desiredWatts (cellsInSeries * detectBatteryChemistry(nominalVoltage).fullDischargeVoltage * maxDischarge));
var energyCellsInParallel = Math.ceil((desiredWattHours (cellsInSeries * nominalVoltage)) (capacity 1000));
var cellsInParallel = Math.max(wattCellsInParallel, energyCellsInParallel);
var totalCells = cellsInSeries * cellsInParallel;
var totalAmpHours = (capacity 1000) * cellsInParallel;
var totalKWh = (totalAmpHours * (cellsInSeries * nominalVoltage)) 1000;
var maxChargeCurrent = cellsInParallel * maxCharge;

document.getElementById( result ).innerHTML =
Pack Configuration: + cellsInSeries + s + cellsInParallel + p
+
Total Cells Needed: + totalCells +
+
Nominal Voltage: + (cellsInSeries * nominalVoltage).toFixed(2) + V
+
Amp Hours of the Pack: + totalAmpHours.toFixed(2) + Ah
+
kWh of the Pack: + totalKWh.toFixed(2) + kWh
+
Fully Charged Voltage: + (cellsInSeries * detectBatteryChemistry(nominalVoltage).fullChargeVoltage).toFixed(2) + V
+
Fully Discharged Voltage: + (cellsInSeries * detectBatteryChemistry(nominalVoltage).fullDischargeVoltage).toFixed(2) + V
+
Max Continuous Charge Current: + maxChargeCurrent.toFixed(2) + A
+
Max Continuous Discharge Current: + ((desiredWatts (cellsInSeries * detectBatteryChemistry(nominalVoltage).fullDischargeVoltage)).toFixed(2)) + A
;
}

window.onload = initialize;
 This calculation also takes into consideration the maximum continuous amp ratings of the cells.

If you over tighten your bolts it could damage the cell. If you have a torque wrench set it to 3nm. Do not tighten over 4nm. We are not responsible for user error. Every cell is factory tested and in new condition. If you over charge discharge, over torque the connections, or cause a short we will not replace the cells once they are handled and assembled into a pack. Always use a BMS, cell holders or insulation between the cells, proper size busbars to carry the current, stay within the voltage amps of the cells, and take necessary safety precautions.

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