Battery knowledge · Testing methods
Intermittent current interruption
Pausing the current for a few seconds every few minutes during a slow constant-current cycle and fitting the voltage response against the square root of time. The instant jump gives internal resistance and the slope a diffusion resistance, mapped across the whole state-of-charge range in a single cycle — a fast alternative to GITT.
- Abbreviation
- ICI
- Also called
- current interruption method
Example
Voltage response and relaxation
At τ = 20 s, 63.2% of the step response is complete; a relaxation retains 36.8%.
Two separate analytical experiments; normalized voltage, not measured data.
Explore the graph
One time constant completes about 63% of a first-order voltage change.
At τ = 20 s, 63.2% of the step response is complete; a relaxation retains 36.8%.
τ = RC; step response = 1 − e^(−t/τ)
Illustrative model. Two separate analytical experiments; normalized voltage, not measured data.
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
Further reading on this topic
These sources provide broader context; they are not presented as citations for every statement in this entry.
- 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.