Battery knowledge · Capacity, energy, power and ratings
Equivalent full cycle
Total charge throughput divided by nominal capacity, so that many shallow cycles count as the equivalent number of full ones. It lets cycle life be compared across different duty cycles.
- Abbreviation
- EFC
- Relationship
- EFC = ΣQ_throughput / (2·Q_nominal)
Example
Count partial throughput
For a 5 Ah reference capacity, 20 Ah of total absolute charge-plus-discharge throughput corresponds to 20/(2 × 5) = 2 EFC. If counting discharge throughput only, use its matching convention without the factor of two.
Explore the graph
Charge and discharge both contribute to throughput when this definition counts a full out-and-back cycle.
40 Ah of absolute charge-plus-discharge throughput equals one EFC at 20 Ah nominal capacity.
EFC = total absolute charge throughput / (2 × Q_nominal)
Illustrative model. Counts both charge and discharge. If a dataset counts discharge-only throughput, its denominator and convention must be changed.
Use in Lemonergy
Design protocol or analysis tool
Repeat charge/discharge
Cycle aging block repeats charge, discharge and rest.
Equation or tool to use
- Repeat
Repeats blocks
Inputs & settings
- count
- Discharge
Removes charge
Inputs & settings
- mode: cc
- a / s
- Rest
Sets zero current
Inputs & settings
- s
- Charge
Adds charge
Inputs & settings
- mode: cc
- a / s
This overview identifies the components to use. Follow the example in Lemonergy for their connections and settings.
- Open Cycle aging block.
- Review currents and rests; compare throughput.
Example. Twenty 50%-depth discharges give ten discharge-equivalent full cycles at fixed nominal capacity.
Observe. Cycle count differs from throughput.
Scheduling cycles does not supply calibrated degradation or physical lifetime evidence.
Open Design → Protocol bench →References & further reading
Further reading on this topic
These sources provide broader context; they are not presented as citations for every statement in this entry.
- The International System of Units (SI), 9th edition
Bureau International des Poids et Mesures · 2026
Topic background · Definitions of SI units and coherent derived units; 2026 revision.
- Battery Test Manual For Electric Vehicles, Revision 3
Jon P. Christopherson · Idaho National Laboratory · 2015
Topic background · Performance characterization, pulse resistance/power, life testing and reference performance tests; historical 2015 edition.