Battery knowledge · Capacity, energy, power and ratings
Energy throughput
The total energy a battery has delivered, or charged and discharged, over its life, counted in kWh or MWh. Discharged energy divided by usable energy gives equivalent full cycles. Stationary-storage and electric-bus warranties often set a throughput limit alongside years, because aging tracks the energy cycled as well as time.
- Also called
- lifetime throughput, MWh throughput, charge throughput, Ah throughput
- Unit
- kWh, MWh
Example
Capacity, energy, power and ratings: an example situation
5 Ah at 3.6 V gives 18 Wh nominally. Integrated measured terminal power may give a different result.
Read Energy throughput alongside Cycle life in this context. The number of full charge–discharge cycles a cell completes before its capacity falls to a stated fraction, usually 80 %, of its initial value under defined conditions. LFP cells reach several thousand cycles; high-energy NMC fewer.
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.