Battery knowledge · Capacity, energy, power and ratings
Rate capability
How much of its capacity a cell can still deliver as the C-rate rises. It is measured by discharging at a series of rates and falls faster for thick, dense electrodes and at low temperature.
Example
High current and usable capacity
At 5 A the ideal duration is 2 h; the chosen exponent gives 1.45 h (7.248 Ah delivered).
Not fitted cell data. A Ragone plot compares specific power and specific energy across measured or modeled conditions.
Explore the graph
An empirical exponent changes the ideal inverse-current duration.
At 5 A the ideal duration is 2 h; the chosen exponent gives 1.45 h (7.248 Ah delivered).
t = H [C / (I H)]ᵏ
Illustrative model. Not fitted cell data. A Ragone plot compares specific power and specific energy across measured or modeled conditions.
Use in Lemonergy
Separate nameplate ratings from test results.
This is a reference concept. No executable Lemonergy block has been verified for this term.
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.