CN0510 development kit shows unexplainable values on LFP LiFePO cell, impedance and battery impedance SensorPal

Hello, 

For a battery management system project I started off with the AD CN0510 development board as I wanted to check how well this chipset works for EIS. 

When trying the devkit with the SensorPal environment I get to a set of results that I do not expect, and I cannot get the values I do expect.

Boards:
- CN0510
- EVAL–ADICUP3029

Software:

- Sensorpal ver. 2.5.2.10
-  firmware ver 2.5.2.7

Used battery cell:

- LFP/LiFePO4

- 3.65V when full, currently ~3.23V

- 6700mAh

Black terminals 1&3 combined and 2&4 combined. 

Red terminals 1&3 to battery neg, red terminals 2&4 to battery pos

Impedance:

When I use the Impedance functionality at a static frequency, the response is "NAN" at the moment:

In previous runs I did manage to get values, however they were very unstable (large range of resistance values, 100-600 ohms)

Battery Impedance:
At a static value this already seems to be noisy:

At a sweep it does not get much better:

I have the feeling I am doing something wrong, but with the manuals and forum replies I don't know what my mistake is.