Custom Battery minimum cutoff and Maximum resistance value


#1

Hi,
I am using the lithium thionyl chloride AA type battery. Did you provide the support for this type of battery ?
If yes then what is the minimum cut of voltage we are able to set ?
Also in terms of battery discharge profile, what is the maximum resistor value we can set ?
Did you provide the temperature data of battery ?

Thank you!


#2

Hi,
We have customers using lithium chloride batteries but we haven’t had the time to run an example profile ourselves yet. The voltage and current levels are within the Arc hardware capabilities.

The desired cutoff voltage during discharge is set in the battery profiling script, and the absolute minimum is 0.5V (our current sink will simply stop sinking current below this level). Typically we use two separate cutoff voltages, one open-circuit voltage cutoff and one that will stop the profiling when we’re about to hit our internal cutoff (typically set to 0.6V). As an example most coin cells have a specified cutoff voltage of 2.0V but that is specified at a very low load. Battery terminal voltage during peak load scenarios will be much lower and we almost always hit our 0.6V cutoff before hitting the 2.0V OCV cutoff.

There are two different maximum resistance values:

For the actual battery discharging (creating the battery profile) we can emulate constant current, constant power and constant resistance discharge loads but currently only constant current is being used by the example profiling script. The load resistance during discharge can be set between 1mOhm to 1MOhm.

The battery profile created during profiling will contain the open-circuit voltage and the internal resistance values over the profiled capacity range. The internal resistance that can be simulated by the Arc hardware is currently between 0 Ohms and 500 Ohms in 1mOhm steps.

Currently a profile will only contain data for one temperature, we’re looking into how to combine several runs at different temperatures into one profile. For now each profile will appear as a separate battery profile in the user interface.