Prolong system on newpriusbatteries

I'll give a quick comment, before the people that are very familiar with the subject chime in.

What you care about is min/max battery/bank voltage difference.
The graph you posted had a min/max battery/bank voltage difference of 0.09volts.

I can show a graph how the stock market was massively volatile for the day, or how the stock market was very steady for the day.
It all depends on the scale.

Iirc, the app scales the min/max voltages.
So, you'll see a big difference between the lowest voltage and the highest voltage, regardless if the min/max difference is 0.01volts, or 15volts.


Again, what you care about is min/max voltage difference.

Check out:
How Do You Check A Toyota Prius Battery? | Torque News


Also,
https://seandippold.com/2017/10/25/determining-health-prius-hybrid-battery/

Predictive battery failure analysis for the Prius Hybrid

Summary:
Knowledge of battery state
According to Predictive Analysis of Prius battery failure, the state of the battery may be derived by the difference between the highest voltage bank and lowest voltage bank.

0.20V = 100% acceptable efficiency
0.45V = 75% acceptable efficiency
0.70V = 50% acceptable efficiency
0.95V = 25% acceptable efficiency
1.20V = 0% acceptable efficiency – bad battery soon to need replacement




Plus,

Good Luck!

 

seems way premature, but i would ask @2k1Toaster

 

The way Dr. Prius scales the voltages on the graphs drives me crazy.

On your image, as mentioned above by prius16, the difference between the highest and lowest is only 9/100 of a volt, but the visual impact of the way it has been graphed leaves you with the impression the "battery modules seem a bit too out of balance" which is actually far from the reality.

Here is the same voltage data graphed more sensibly:

Now it looks like all blocks are fairly close which is much closer to reality.

You can use an HA-type conditioning system on these modules, but as bisco said, it seems way premature. The 8-10 year mark would be what I would expect to be the "early" point to start reconditioning.

 

I wouldn't worry about it. A NPB system should last for years and years if taken care of properly which is very easy and hassle free.

Taking care of it properly means don't just give it short drives all the time. The more and longer you drive the healthier the battery is.
There's many G2's out there with the original hybrid battery because that owner drives the heck out of the car.

Long periods of inactivity really shorten the life of the cars hybrid and 12 volt battery. If you don't drive much for whatever reason this is the wrong car for that life style.

Besides Prolong systems are very expensive.

 

For what it's worth, I have a 2012 Prius v that I started using the Prolong battery charges/discharges at around 30,000 miles.

I just finished one at 79,000 miles and Dr Hybrid's life expectancy test says it "has estimated 101.39% capacity left, it is in new condition."

Not bad for a 10 year old battery.

 

I used a Prolong for 3 years works very good. But started using it when the battery was 9 years old and car was not driving much since wife retired.
Prolong kept it alive long enough till the NPR system came online. I installed an NPR system runs great.

But car became such a hassle with the cat theft crap and not driving it much I sold last year. Sold the oem cat off it before i sold it then sold my prolong too on eBay got more than I paid for it .

But new NPB system...you got years and years before worrying about a prolong...unless you don't drive much. And if you don't drive much don't have a G2 Prius.

 

What is the NPR System?

Posted via the PriusChat mobile app.

 

NPR...NPB........Third sentence post #1

 

lol...sorry I had NPR Tiny Desk music playing while I was typing. Bitch getting old lol....

 

I watched the videos but I am still not clear on what is a "good" voltage difference? Is anything under 0.20 difference considered good?

I need to do more tests with the app it is a little challenging to follow the prompts and get it to test properly, but I think I am at 49% expectancy/capacity, but no codes or errors or bad cells reported.

 

I would expect that the cylindrical batteries would work pretty much the same as the original prismatic ones with the prolong charger. It is more or less the same chemistry, only the battery geometry is different.

My worry about the new battery would be that the cylindrical cells would not last very long. This is based on three things:

First, the miserable experience I had with the "new and higher capacity" cylindrical batteries for the Honda Civic Hybrid (HCH) which I used to own. Put simply, those Chinese made batteries were of much lower quality than the original Japanese cells and so the pack failed in just a few years.

Second, that the first gen Prius had the same sort of cylindrical batteries as the HCH and this new battery, and Toyota decided to change over to the prismatics. Probably I think because they were seeing hints of the short battery life that plagued the HCH, even with the original Japanese batteries.

Third, a conversation I had with a fellow who did basic research on NiMH batteries, and his view that the prismatics were simply better for use in cars than the cylindricals. Admittedly that was several years ago and things might have changed. However, given the move away from NiMH batteries I wouldn't really expect many if any improvements as the technology is phased out of new products.