Battery Cell Calculator
Calculate total voltage, capacity, and energy for battery packs
Battery Cell Calculator
For various battery chemistries (Li-ion, LiFePO4, NiMH, etc.)
Results:
Total Voltage (V): 0.00
Total Capacity (Ah): 0.00
Total Energy (Wh): 0.00
How to Use the Battery Cell Calculator
Series Connection (S)
- Enter the number of cells connected in series.
- Series connections increase total voltage.
- Capacity remains the same as a single cell.
Parallel Connection (P)
- Enter the number of cells connected in parallel.
- Parallel connections increase total capacity.
- Voltage remains the same as a single cell.
Cell Parameters
- Input the nominal voltage of a single cell (e.g., 3.7V for Li-ion).
- Provide the capacity of a single cell in Amp-hours (Ah).
Battery Cell Fundamentals
Series Connection
Connecting cells in series adds their voltages together while keeping the total capacity the same as a single cell. This is used to achieve higher operating voltages for devices.
Parallel Connection
- Connecting cells in parallel adds their capacities together while keeping the total voltage the same as a single cell. This is used to achieve higher energy storage and longer runtimes.
Key Concepts:
Total Voltage = Cells in Series × Nominal Cell Voltage
Total Capacity = Cells in Parallel × Cell Capacity
Total Energy (Wh) = Total Voltage × Total Capacity
Calculation Formulas
Total Voltage (V):
V_total = S × V_cell
Total Capacity (Ah):
Ah_total = P × Ah_cell
Total Energy (Wh):
Wh_total = V_total × Ah_total
Example Calculation
Battery Pack: 4S2P (4 cells in series, 2 in parallel)
Nominal Cell Voltage: 3.7V
Cell Capacity: 2.5Ah
Total Voltage = 4 × 3.7V = 14.8V
Total Capacity = 2 × 2.5Ah = 5.0Ah
Total Energy = 14.8V × 5.0Ah = 74.0Wh
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