Understanding Battery Capacity

The capacity of a battery is a measure of the energy it can store. The relationship between voltage, battery capacity, and stored energy is given by the formula:

Formula:

E = V × C (For Wh and kWh)

E = V × C × 3600 (For Joules and Kilojoules)

Where:

• E: Stored energy (in Wh, kWh, Joules, or Kilojoules)
• V: Voltage (in volts)
• C: Battery capacity (in ampere-hours)
• 3600: Conversion factor from hours to seconds (for Joules)

Example Calculations

• Example 1: Wh Calculation

  • Voltage: 12V
  • Battery Capacity: 100Ah
  • Stored Energy: 12 × 100 = 1,200 Wh
  • Result: 1,200 Wh

• Example 2: kWh Calculation

  • Voltage: 48V
  • Battery Capacity: 200Ah
  • Stored Energy: 48 × 200 = 9,600 Wh = 9.6 kWh
  • Result: 9.6 kWh

• Example 3: Joules Calculation

  • Voltage: 12V
  • Battery Capacity: 50Ah
  • Stored Energy: 12 × 50 × 3600 = 2,160,000 J
  • Result: 2,160,000 Joules (J)

• Example 4: Kilojoules Calculation

  • Voltage: 24V
  • Battery Capacity: 10Ah
  • Stored Energy: 24 × 10 × 3600 = 864,000 J
  • Result: 864 kJ (Kilojoules)