Help required to understand Prius Battery

Discussion in 'Gen 3 Prius Technical Discussion' started by Iqbal, Aug 5, 2018.

  1. Iqbal

    Iqbal New Member

    Joined:
    Jul 26, 2018
    5
    0
    2
    Location:
    Islamabad
    Vehicle:
    2012 Prius
    Model:
    N/A
    Screenshot_20180803-200421.jpg

    Screenshot_20180804-204935.jpg

    I have a 2012 Prius with over 99K KM on it. I have been getting the P0A80 error constantly. I used a OBDII to observe the battery status using DR Prius App. however I don't know what to make of the reading it is giving me. For example it shows the Delta SOC at 37% and its coloured in red. What does mean? Secondly block eight is always very low and coloured yellow. When the bar drop to red, the car throws the error P0A80. does this mean that the block 8 is faulty or the complete battery has gone? Pics are attached if some one can help me understand the readings please i.e, what should be the ideal values etc.
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    94,733
    42,959
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    just a guess, but it looks like you need to replace block 8 and rebalance the pack.i don't think there is such a thing as the complete battery gone.
     
  3. Iqbal

    Iqbal New Member

    Joined:
    Jul 26, 2018
    5
    0
    2
    Location:
    Islamabad
    Vehicle:
    2012 Prius
    Model:
    N/A
    Bisco can you suggest any specialization individual here on Prius chat that can give me technical advice
     
  4. The Critic

    The Critic Resident Critic

    Joined:
    Oct 28, 2005
    3,136
    2,237
    0
    Location:
    CA
    Vehicle:
    2011 Prius
    Model:
    Three
    In short, you need a replacement pack. New is ideal.

    Block 8 is your main issue, but the blocks around #8 are not in great shape either. I am surprised since your mileage is not very high. Is your hybrid battery cooling fan working properly?
     
  5. Iqbal

    Iqbal New Member

    Joined:
    Jul 26, 2018
    5
    0
    2
    Location:
    Islamabad
    Vehicle:
    2012 Prius
    Model:
    N/A
    Yes the fan working and in clean condition. Checked and cleaned it my self last week. I also must confess that sometimes cars here in Pakistan have tampered odometers. So I am suspecting this one maybe had an tampered odometer!
     
  6. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,698
    11,285
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    If you are a do-it-yourself type, you might want to message @2k1Toaster to research the cost of his pack of new cells. I know he has sold some outside the US. His website link is in my signature.
    His pack may be less expensive than a new Toyota battery pack.
     
  7. FuelMiser

    FuelMiser Senior Member

    Joined:
    Jun 29, 2008
    997
    703
    0
    Location:
    Monument, CO
    Vehicle:
    2016 Prius
    Model:
    Touring
    Look at this thread to understand the 14 bars in your graph, 3G Hybrid Battery Voltage? | PriusChat. What you want is to have all 14 bars at the same voltage near 15.0 volts. I believe you can explain the shape of your graph as such: as you move from the outside toward the middle, you are moving from the outside of the pack to the middle and the cooling is less efficient in the middle of the pack. Heat is degrading the packs in the middle giving the lower voltage readings. It's almost a perfect gradient as you move from the outside to the middle on both sides. I believe you can buy individual battery modules and replace the ones in the center of your pack giving you the lowest readings. Search the forum (or YouTube) for advice on re-conditioning battery packs.
     
  8. Prodigyplace

    Prodigyplace Senior Member

    Joined:
    Nov 1, 2016
    11,698
    11,285
    0
    Location:
    Central Virginia
    Vehicle:
    2017 Prius
    Model:
    Two
    You could replace modules but ideally you should get the same generation modules and balance them to match the other ones. Companies selling "reconditioned" packs do not take the time needed to proper balance and recondition a pack.

    I know Hybrid Automotive sells used modules and the Prolong reconditioning system. That may be the best way to lengthen the life of an old pack, but it is still an old pack that will fail sooner than a new pack or a pack with the new cylindrical cells I referenced earlier.
     
  9. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    6,359
    2,670
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    Greetings... Because you're in Pakistan, the cost of replacing the entire pack, once you account for shipping, customs, taxes, etc. is going to be a year's salary or more. Your best bet is to pull the hybrid pack out and replace individual modules with used replacements which will likely cost less than 7 thousand Ruppee. In the meantime don't drive the vehicle until the repairs have been made... As you can see in the graph, the failed/failing module is creating too much heat that is likely damaging neighboring modules.

    If you have some skills working with batteries you can pull and clean connectors (bus bars) off the modules, then test voltage of each of the 28 modules, as well as test how much the voltage of each module drops after 2 minutes of being hooked up to the car's head light bulb. Also measuring internal resistance provides good data. Once you have all that data, you'll know which modules are the highest priority to replace.

    While waiting for the replacement battery modules you can recondition battery modules you intend to keep using to improve it's overall performance by using two headlamp bulbs to drain each module down to 6.5 volts, then recharge each module using a NiMh smart battery charger that they sell for charging RC drones & toy cars to charge each module back up. Next step is to discharge each module again, this time down to 6 volts, then recharge... Then a 3rd time to below 6 volts... Be careful on the last one. When these modules drop below 6 they start to fall off a cliff and if they discharge to zero the polarity will reverse and you'll have to order more modules.

    Finally, test your replacement modules to make sure they have similar data under a load test and internal resistance, then put it all back together and pray that everything works and hopefully it will. Because you're in Pakistan, the hardest part is going to be finding quality replacement modules from reputable sellers who know how to successfully ship them there.
     
    #9 PriusCamper, Aug 7, 2018
    Last edited: Aug 7, 2018
Loading...