Battery knowledge · Testing methods
Rate capability test
Discharging a cell at a series of rates — C/10, C/3, 1C, 2C, 3C — from a full charge and recording the capacity delivered at each. The result is the rate-capability curve on a datasheet and the first sign of a transport limitation. [1]
- Also called
- C-rate test, discharge rate test
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
Record specimen, state, instrument, temperature and timing.
This is a reference concept. No executable Lemonergy block has been verified for this term.
References & further reading
Technical references
- Battery Test Manual For Electric Vehicles, Revision 3
Jon P. Christopherson · Idaho National Laboratory · 2015
Technical reference · Performance characterization, pulse resistance/power, life testing and reference performance tests; historical 2015 edition.