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Battery series/parallel arithmetic
Compare nominal pack voltage, capacity, energy and cell current sharing.
A clear answer. Here’s how.
For identical balanced cells, series multiplies voltage and parallel multiplies ampere-hour capacity. Total nominal Wh is Ns×Np×Vcell×Ahcell. Assumes equal current sharing across parallel cells and reports per-cell C-rate. This is nominal connection arithmetic; it does not infer charge limits, protection, current ratings, balancing or physical pack construction.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Cells/groups in series
- 4
- Cells in each parallel group
- 3
- Nominal cell voltage (V)
- 3.6
- Nominal cell capacity (Ah)
- 3
- Supplied pack load current (A)
- 6
Example result
- Total cells
- 12
- Nominal pack voltage (V)
- 14.4
- Nominal pack capacity (Ah)
- 9
- Nominal stored energy (Wh)
- 129.6
- Load current per parallel cell (A)
- 2
- Per-cell discharge rate (C)
- 0.666666666667