Traction Battery Health Monitor for Toyota Prius

Discussion in 'Prius OBDII Third-Party Apps' started by pnitin, Oct 11, 2012.

  1. bisco

    bisco cookie crumbler

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    welcome! could be a loss of mpg's, or you might notice the battery meter acting erratically. but before you blame the hybrid battery, you want to check/replace the 12v as it has a mysterious effect on many different operations of the vehicle.
     
  2. pnitin

    pnitin New Member

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    Hello Mutual,
    you should look for along with the cell Voltage is cell resistance which should not be above 35 miliohm,
    I have always seen it between 20 to 29 miliohm on 2004 prius.
    also being in PA you can do one very simple test, collect the data for few days and analyze what is the voltage difference between the battery charging state cell voltage and battery discharging state cell voltage at same SOC.
    for good battery these Numbers should not deviate from each other too much.
    I would say collect data on hilly tureen that will let you know more of stress test on battery,
    also one thing watch is temperature of battery , bad cells will cause more heat.
    regards
    Nitin



     
  3. jdcollins5

    jdcollins5 Senior Member

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    I received my Can Log device from OpenElectrons.com. I plugged it in the OBDII connector and made a couple of trips on Sunday. I checked the Micro SD card and saw a new file created. I checked the file and it had ZVW# and a couple of other pieces of data but no battery data.

    I contacted Nitin at [email protected] and he stated that this was due to being a 2010 ZVW30 and he would have to send me some additional files. Evidently I was the first Gen III beta tester. I downloaded the file and this time I had a new file full of hex data. He sent me a second file which I downloaded and drove to work this morning.

    Nitin was saying that it would take a few iterations to get the data storing correctly for the Gen III. I will keep updating this site with our progress. I look forward to monitoring and storing the HV battery health data.
     
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  4. lensovet

    lensovet Not your typical youngin :)/BP Brigade 207

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    I'm slated to receive a unit for my PiP as well
     
  5. jdcollins5

    jdcollins5 Senior Member

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    Nitin has my PriLog working very well now. Find attached a log file of my morning commute to work. For reference the outside temp was about 43F. A description of my commute is:
    • 3 blocks - residential neighborhood at 25 mph
    • 5 miles - main boulevard at 45-50 mph with stop lights
    • 20 miles - highway at 60 mph with CC
    • 1 mile - 45 mph in to work parking lot.
    Data info:
    • Vb1 = millivolts : 15983 = 15.983V
    • Rb1 = milliohms : 24 = 0.024 ohms
    • Temperatures = degrees C
    I have monitored all of this data at one time or the other with SGII XGauges but only 4 at a time. It is really nice to see this much data at sample intervals and see how the battery management ECU responds to current flow and SOC changes. My car has 53k miles so I have a very good record of what my HV battery looks like operating normally. I plan to gather another log file the first time it gets below freezing. I am really looking forward to next summer in 95F weather especially after the car has been parked in an open asphalt parking lot all day !!

    Once these devices become available I would highly recommend getting one to record your data. This is the very information that you would pay a Toyota dealer a $100 diagnostic fee to hook up their Techstream and give you a report.

    It is very simple to use. Connect to your OBDII port with car off. A yellow led will begin to blink. Start the car and a red led will blink indicating that it is uploading data. Each time you stop and start the car it will open another log file. Remove the device, slide back the Micro SD card holder and remove the module, insert the SD module in a SD card reader to view and save PriLog text file. I have cut and paste my text file into an Excel spreadsheet in order to view better, make calculations, create trends, etc.
     

    Attached Files:

  6. midear

    midear New Member

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    I am interested too :)

    2006 Prius


    . At present I am soliciting beta testers.

    if any one interested please let me know
    Nitin[/quote]
     
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  7. boppo

    boppo Active Member

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    I am interested in this beta test also.
     
  8. pnitin

    pnitin New Member

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  9. Fred_H

    Fred_H Misoversimplifier

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    Hi Nitin,
    Thanks for making this neat little gadget available. Mine came ready to go with a 2GB card already installed. Thanks also for shipping to Germany.

    I noticed that there seems to be no link or chain of links from your home page to the CanLog ordering page. Apparently only Priuschat readers can find it from this thread.

    After I ordered, I was away for a couple weeks, so I have only been testing during the last week. I noticed that the log times are not in regular intervals. The intervals seem to vary randomly mostly between three and twenty seconds; sometimes longer. For me that is no problem. It has no effect on my analysis of the data, but perhaps it should be mentioned in the users guide just to avoid potential confusion for new users.

    Below is my latest log file. On that trip I tested nearly the full SOC operating range of the battery by driving in EV as long as possible, then driving up a hill, force charging, and driving downhill to charge as much as I could.
     

    Attached Files:

  10. Jeff80465

    Jeff80465 Junior Member

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    Is this device no longer available? The link to the page to add it to the cart does not have a price listed and says it can not be added to the cart?
     
  11. r4rd

    r4rd New Member

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    Hi Nitin, it is possible to test your device on Plug in: ZVW35L-BHXEBW
     
  12. bisco

    bisco cookie crumbler

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    au revoir nitin.:(
     
  13. boppo

    boppo Active Member

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    Jeff, I bought on a few months ago.
     
  14. boppo

    boppo Active Member

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    I placed the order on April 16th.
     
  15. johnjamis

    johnjamis Junior Member

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    Will this data logger work on both gen2 and gen3 cars? How about running a special for us and I will give it a try. It looks like a fun gadget.
     
  16. pnitin

    pnitin New Member

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    this works with GneII and GneIII well but not on the latest PIP however new PIP's are under factory warranty any way.
    Nitin
     
  17. jdenenberg

    jdenenberg EE Professor

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    Do you also log the HV battery current at the time of the module pair (not cell) voltages (14 module pairs in a Gen2 or Gen3).

    JeffD
     
  18. pnitin

    pnitin New Member

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    yes it logs all these parameters
    Time(S) SOC I(A) HV Vb1 Vb2 Vb3 Vb4 Vb5 Vb6 Vb7 Vb8 Vb9 Vb10 Vb11 Vb12 Vb13 Vb14 Rb1 Rb2 Rb3 Rb4 Rb5 Rb6 Rb7 Rb8 Rb9 Rb10 Rb11 Rb12 Rb13 Rb14 T_in T1 T2 T3 MG1T MG1IT MG2T MG2IT
     
  19. jdcollins5

    jdcollins5 Senior Member

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    Nitin,

    Just wanted to let you know that I just used my Traction Battery Health Montior yesterday to check battery condition now that we are in the 90's and my car sits in an open asphalt parking lot all day.

    It was comforting to see that my battery is holding up well in this NC July heat. I graphed all 14 of the battery module pair voltages during the trip to and from work and they all tracked very nicely.

    Even though the inside of the car was like 113F and the battery starting temps were around 97F, once I got on the highway and the AC cooled down the interior the battery fan did a good job of stabilizing the battery temps and actually dropped the temps from a high of about 104F down to about 95F. By the time I drove through the city traffic to the house the battery temps only rose back up to about 104F, which is about where it would get to when the temps were in the 80's.

    This is an excellent device to have for peace of mind about the battery health with the car being 3.5 years old and 63k miles. I have some good historical data to compare as the car and the battery continues to age.

    Thanks,

    Dwight
     
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  20. bisco

    bisco cookie crumbler

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    cool! will one be developed for the pip in the future?
     
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