Measuring impedance

Pajda, thank you for your kind words. And thank you for the DCIR 10s description in other thread.

Unfortunately ZKE testers are not convenient for DCIR measurement (measurement lags and unsufficient resolution)

HKJ data - you are right, there is some weird consistency here. :-)

Anybody who understand DCIR measurement knows that such method, resolution and results is not OK. Especially for HKJ, as his renowned pages are in my opinion probably the most respected pages regarding the Li-ion cells testing.

For example such measurement is not possible to use for tracing of the cell resistance trend during use or cycling/aging. Temperature measurement is also little bit issue, but not so much as internal calculated resistance.

Frankly, I am surprised that nobody is using IEC 61960-3 standard for DCIR.

Yes, it´s always good to have possibility to compare measurement, therefore would be nice to have all using one standard method, which obviously is not the case today.

I had similar issues with Sanyo GA and 20700B DCIR values like you.

Bellow is a new table with added SONY VTC6 and Sanyo 20700B. As all cells were on the table, I have made 10s DCIR measurement to compare both methods, IEC 61960-3 and 10s DCIR and added ACIR to have all data gathered.