Battery knowledge · Testing methods
Calendar-life test
Storing cells at a matrix of temperatures and states of charge, typically 25–60 °C and 30–100 % SOC, with periodic reference tests, to fit the calendar-aging model. Months of data at high temperature are extrapolated to years at ambient through the Arrhenius law. [1]
- Also called
- storage test
Example
Diffusion-limited film growth
At four reference time units, thickness is 2× the reference thickness.
Normalized analytical relation, not a capacity-loss or SOH prediction.
Explore the graph
Four times the elapsed time gives twice the film thickness in this model.
At four reference time units, thickness is 2× the reference thickness.
δ / δ_ref = √[(t / t_ref) A]
Illustrative model. Normalized analytical relation, not a capacity-loss or SOH prediction.
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.