Dr Prius draining HV battery while testing

Hi there,

I ran today a "Life Expectancy Test" in Dr Prius on my 2006 Prius.

Test started by fully charging the battery by asking me the to push the brake and accelerator pedals at the same time for about a minute. Once battery was fully charged (all green bars), I had to keep the needle in the green zone for about 800 secs (don't remember exactly but it was long .

Test was running smoothly for the whole time. But around 3 minutes left, I could see a discrepancy between what the test was reading from the state charge (displaying something like 40%) and what the MFD displayed: only 3 bars. And then, MFD displayed 2 purple bars and the engine kicked in to not let the battery drain too low I guess.

The test then stopped and displayed this message:
"Error! Battery was somehow charging during test, accuracy was compromised.", scoring battery to 79.3%.

I am afraid that the sudden drop of the battery charge might be a sign of an issue with the battery. What do guys think?

Note that on the Dr Prius dashboard, everything looks "okay" (attached picture).

Thanks for your help!

 

Thanks @PriusCamper. Would you know what voltage difference is acceptable vs. is not? From the screenshot I attached in my last post, delta seems between 0.20 and 0.35v. No idea if that is an acceptable range.

 

Interesting enough, the original screenshot I attached was taken in parking mode. I drove the car and the voltage difference is much higher now in the blocks (attached picture).

It seems to me is the accumulative voltage difference at block level is not going to trigger the warning light in the dashboard but instead only the overall voltage difference between the weakest and the strongest blocks is considered (in my case, difference seems to be 0.10v).

Assuming I read correctly these data, I am wondering if a high voltage difference in a block is a sign of wear, hence ultimately leading to a high discrepancy between max/min blocks.