How to use the battery coulombic efficiency calculator
Find how much charge a battery gives back on discharge compared with the charge put in. Enter discharge capacity, charge capacity in the fields above; the coulombic efficiency, capacity lost per cycle are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “coulombic efficiency battery”, “charge efficiency”, “capacity lost per cycle”, “calculate battery coulombic efficiency”, “find coulombic efficiency”.
Formula
Variables
- Qd — Discharge capacity (Ah)
- Qc — Charge capacity (Ah)
Worked example
With discharge capacity = 2.8 Ah, charge capacity = 3.0 Ah, the calculator gives coulombic efficiency ≈ 93.33333 %; capacity lost per cycle ≈ 0.2 Ah.
Frequently asked questions
What is the battery coulombic efficiency calculator used for?
Find how much charge a battery gives back on discharge compared with the charge put in. It helps with questions such as “coulombic efficiency battery”, “charge efficiency”, “capacity lost per cycle”.
What is the formula for the battery coulombic efficiency calculation?
Coulombic efficiency (%) = Qd / Qc × 100. Capacity lost per cycle (Ah) = Qc-Qd. Here Qd is discharge capacity (Ah), Qc is charge capacity (Ah).
What inputs do I need for the battery coulombic efficiency calculator?
You need discharge capacity in Ah, charge capacity in Ah. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the battery coulombic efficiency calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the battery coulombic efficiency result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.