New Prius Battery already out of balance

How is the battery being maintained while you're not driving it?

 

did you contact @2k1Toaster for advice?

 

I don't think the voltage differences you are showing (.13V, .12V, and .11V) is any cause for concern, and the sample size is too small to conclude that Block #6 is becoming weak (since according to the time stamp at the top of the screen shots, they were all taken within seconds of one another). If you were to report the statistic that shows the percentage of time that Block #6 has the lowest voltage, that might be a little more conclusive. Our Gen 4 was purchased new, and Dr. Prius has always shown some variability in the voltages of the various blocks. I believe it is unrealistic to expect that all the blocks' voltages will always be perfectly aligned, even on a new battery.

 

yeah, that's not recommended, and can lead to a fire

 

The voltage difference you're looking at is insignificant. Sure, you can verify the torques on the fasteners, but this voltage difference should be at the very bottom of your list of things to worry about. Regardless of what other things you have going on in your life, this should not be anywhere in your list of high priorities.

 

here's some data from my New Prius Batteries on my 2007. Your variation range is 0.1 in your screenshots which seems normal to me. Here mine goes over 2.5 for some moments. It depends on what the car is doing (accelerating, braking with regen, etc)

 

Log the data during a full acceleration, from a dead stop. You will be drawing 150 amps from that pack. Repost....

 

Drive the car. 10 miles a week is nothing and is hard on both battery's. In the morning before starting the car get a voltmeter and check the 12 volt battery at the front jump point. You wont like that either. A healthy happy 12 volt battery in a Prius lives at 12.6 volts.
At least that's what the 3 battery s I have put in my G2 measured over the last 14 years.

Take the car for a long drive on the highway.

 

The 'bumps' are just casting flash which is pretty much present on most plastic things that are vacuum cast. Think of when you were a kid and built one of those plastic model airplanes or cars and had to break a small plastic part off that big sheet that had like 20 pieces all connected together. It always left a small tit of plastic sticking out.

Like this

 

The main problem I see with those Dr. Prius screen shots is that they are not drawn to the proper scale. This is how the first one should really look:

 

One of things I don't like about Dr Prius app is the auto scaling on the voltage bar graph. It makes block 6 LOOK horrible but really anything under 0.3V is nothing to worry about.

Posted via the PriusChat mobile app.

 

I just used the graphing function in Excel to create that, after copying the Voltage values I saw in your first screen shot.

In Torque Pro, once you have specified the data set that you want to monitor (the HV Block Voltage for Blocks 1 - 14, for instance), you can touch the gear icon on the bottom left of your Torque screen, and it will bring up a menu that includes "Start Logging". Choosing that will create a .csv file that contains the values you have specified, recorded at 1 second intervals, until you hit the gear icon again and tell it to "Stop Logging". This log is very useful for determining how each block performs under both charging and discharging conditions. One example of its usefulness would be to allow you to calculate what percentage of time each block is at the minimum voltage of all the blocks and what percentage of time it is at the maximum voltage, as I alluded to in Post #4. If you find images easier to work with than raw numbers, that .csv file can be imported into Excel and using Excel's graphing function, you can create line graphs like the one @donbright showed you in Post #9. (I believe I've seen that same ability in Hybrid Assistant, but I haven't used that app as much as I have Torque Pro).