P0A80 advice...

Bummer about your P0A80 code, but I’m not sure what you need to do to fix it. You probably have another bad module or possibly just the difference in resistance is triggering the code. I hope you can figure it out.

 

Are you monitoring block voltages while you drive? You should see a high "Voltage Diff" value at some point along with what ever block voltage is going too far above or below the others. Likely happening at high loads- heavy accel or braking/regen. I believe DrPrius will datalog on android then you can view the data in MS Office. If you have Techstream you can see if there is freezeframe capture for the P0A80 with any additional info.

Posted via the PriusChat mobile app.

 

My voltage difference range according to Dr. Prius app was 0.10 to 0.51v and a 1 milli-ohm difference in the resistance on just a single block. It may be the resistance and not the voltage difference causing your code still.
I read somewhere that you can replenish the electrolytes to restore the resistance and battery block to acceptable level. I’m just not sure if it’s worth it until you figure out what is triggering your P0A80 code.

 

I think you need to use Techstream. The Dr Prius app did not reveal a few blocks that Toyota said were also weak. That’s why I took my car into Servco. Your resistance looks good so you probably just have another bad block or two under load and a voltage difference. Finding which one is the hard part. I think your #14 module needs to have a more similar spec’d batteries paired together because the difference is too big. But, I’m not sure what the parameters are that actually triggers the P0A80 code, so I’m just guessing.
Sleep well!

 

That’s a good place to start. You may have to leave out the floor and box a little longer. Hopefully you’ll get it sorted out soon.

 

Sorry bypassing the hardness wastn't your problem.

But it sounds like all the packs are failing. You may eventually be able to match enough of them
to get it working, but for how long?
The stronger batteries will only put more stress on the weaker ones which will cause them to fail.

But, I do hope you are able to sort it out.

 

Hiya... I am going through the same. Not done yet.

A few hints:
* In Dr Prius, resetting codes ALSO clears any knowledge of IR (Internal Resistance.) Save IR before clearing!
* A better app for tracking block voltages during charge/discharge/driving is Hybrid Assistant. Creates wonderful graphs of all blocks. And can export the data.
* So far, I have learned that an extra-good or extra-bad block can throw a code during extreme drain. HA app will show the spike in delta-V (ie a block briefly drops its voltage WAY down, while other block(s) stay high.

More later. Will post my stuff on my thread...

 

i wonder if switching module 8 and module 13 would help. It looks like youre so close with everything, hopefully you can make this pack work for longer. Do you have a way to measure the mah of each module and match according to the capacities? These are just ideas and I have never actually reconditioned a battery yet, so far just a reader

 

My thoughts:
* Not sure how you matched up modules. Given the data you provided, see my new arrangement (attached)
- I sorted on vAfter
- Then made blocks (a-n) of lowest+highest
- As you can see, again assuming your data (see below for more on that), I have improved vDelta from (.09-.31 volts) to (.05-.11 volts) -- almost 300% improvement in "worst case" vDelta...

The Harder Issue, IMHO (just an educated guess as a EE... I do NOT really know what I am talking about at this point!!)
- measuring only after the modules have a chance to "recover" rather than at peak load...
- means we are not really matching module performances to make truly "similar" blocks.
- AFAIK, what drives the ECU nuts is when vDelta skyrockets during an extreme battery drain. I will try to upload a graph from one of my runs.

 

That's a great result!

And yes, a+a are intended to be a block, etc.
I was NOT specifying the block sequence. It was just low-to-high. As most suggest, you want the best blocks in the middle, where it gets hottest.

 

I’m saddened to hear that. I may have to do the same. Please keep us updated on your progress.
Thanks

 

That will give you peace of mind for the next few years!