Battery Discharge Rate Calculator
This calculator helps you determine the discharge rate of a battery, often expressed in Amperes (A) or C-rate. Understanding discharge rate is crucial for managing battery performance, lifespan, and safety. A higher discharge rate means the battery is supplying more current, which can lead to increased heat and faster depletion.
Calculate
function calculateDischargeRate() {
var capacityAh = document.getElementById("batteryCapacityAh").value;
var dischargeCurrentA = document.getElementById("dischargeCurrentA").value;
var dischargeDurationHours = document.getElementById("dischargeDurationHours").value;
var resultDiv = document.getElementById("result");
// Clear previous results
resultDiv.innerHTML = "";
// Input validation
if (isNaN(capacityAh) || capacityAh === "" ||
isNaN(dischargeCurrentA) || dischargeCurrentA === "" ||
isNaN(dischargeDurationHours) || dischargeDurationHours === "") {
resultDiv.innerHTML = "Please enter valid numerical values for all fields.";
return;
}
// Convert inputs to numbers
capacityAh = parseFloat(capacityAh);
dischargeCurrentA = parseFloat(dischargeCurrentA);
dischargeDurationHours = parseFloat(dischargeDurationHours);
// Calculations
var cRate = dischargeCurrentA / capacityAh;
var actualCapacityUsedAh = dischargeCurrentA * dischargeDurationHours;
var percentageCapacityUsed = (actualCapacityUsedAh / capacityAh) * 100;
// Display results
var htmlOutput = "
Discharge Rate (C-rate): " + cRate.toFixed(2) + " C";
htmlOutput += "
Actual Capacity Used: " + actualCapacityUsedAh.toFixed(2) + " Ah";
htmlOutput += "
Percentage of Capacity Used: " + percentageCapacityUsed.toFixed(2) + "%";
// Edge case: If actual capacity used exceeds nominal capacity
if (actualCapacityUsedAh > capacityAh) {
htmlOutput += "Warning: The calculated discharge duration exceeds the battery's nominal capacity at this discharge rate.";
}
resultDiv.innerHTML = htmlOutput;
}
.calculator-container {
font-family: sans-serif;
border: 1px solid #ccc;
padding: 20px;
border-radius: 8px;
max-width: 500px;
margin: 20px auto;
background-color: #f9f9f9;
}
.calculator-container h2 {
text-align: center;
color: #333;
margin-bottom: 20px;
}
.calculator-container p {
color: #555;
line-height: 1.6;
}
.input-section {
margin-bottom: 20px;
}
.form-group {
margin-bottom: 15px;
display: flex;
align-items: center;
gap: 10px;
}
.form-group label {
flex: 1;
font-weight: bold;
color: #444;
}
.form-group input[type="number"] {
flex: 1.5;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box; /* Important for consistent sizing */
}
button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #007bff;
color: white;
border: none;
border-radius: 4px;
font-size: 16px;
cursor: pointer;
transition: background-color 0.3s ease;
}
button:hover {
background-color: #0056b3;
}
.result-section {
margin-top: 25px;
padding-top: 15px;
border-top: 1px solid #eee;
}
.result-section h3 {
color: #333;
margin-bottom: 10px;
}
#result p {
margin-bottom: 8px;
color: #333;
}