1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Lithium Prototype Test

Discussion in 'Gen 3 Prius Accessories and Modifications' started by AzusaPrius, Oct 26, 2020.

  1. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,103
    4,032
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    It’s not even accurate for the original nimh battery either. When dash shows 2 bars, actual battery is around 40% Or if it shows all bars, hv SOC is around 80% so that may not be an important issue to Toyota when designing the SOC gauge
     
  2. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,774
    4,372
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    These inaccurate measurements are common with less expensive / older technology... When I rebuild battery packs my cheap gear can tell me the amount of amp-hours it pumps into the pack but it does terrible at telling me how much of that is lost to heat and how much of that actually got stored into the module. So I suspect technology in the early 2000's in Gen2 Prius has a similar problem? Anyone with a Gen4 Prius get more accurate SOC readings?

    We once had a dude from Pakistan on here who was convinced his battery pack he rebuilt wasn't completely fixed because the SOC reading was bad so I explained to him the reason to ignore it and pay attention to the other readings instead... Though still more to learn in that regard...
     
  3. Soh

    Soh Junior Member

    Joined:
    Oct 25, 2018
    26
    8
    0
    Location:
    Australia
    Vehicle:
    2010 Prius
    Model:
    i-Tech
    I re read it. It and a few other pistd regarding cooling is one of the reasons why I asked the question. Does their implementation of Lipo have any updates on ECU for 3rd Gen?
     
  4. jacktheripper

    jacktheripper Active Member

    Joined:
    Dec 13, 2017
    229
    465
    4
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    Base
    Hell no on Lipo, it's powerful and affordable but too dangerous. That's why I switched to LTO and LifePO4 only, safety first even if it cost more. also, no ECU reprogram required @Soh

    Jack
     
    Soh and PriusCamper like this.
  5. jacktheripper

    jacktheripper Active Member

    Joined:
    Dec 13, 2017
    229
    465
    4
    Location:
    USA
    Vehicle:
    2010 Prius
    Model:
    Base
    Believe me button is overrated :)

    I have aftermarket temperature sensors probe directly to the battery cells on all my modified Prius, the temperature sensing from stock location has a small delay due to the heat transfer through the case, that's what I have been doing/testing for the past few years guys!

    upload_2020-11-29_0-30-48.png
    upload_2020-11-29_0-32-33.png
     

    Attached Files:

    PriusCamper and SFO like this.
  6. AzusaPrius

    AzusaPrius Senior Member

    Joined:
    May 27, 2020
    1,639
    766
    0
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    IV
    Looks like "back to the future"
    Or better yet "Pack of the future"

    Posted via the PriusChat mobile app.
     
    kazbach, mjoo, GG707 and 2 others like this.
  7. Travis Sanders

    Travis Sanders Junior Member

    Joined:
    Feb 4, 2019
    63
    25
    0
    Location:
    Hawaii
    Vehicle:
    2005 Prius
    Model:
    Two
    At 35C Isn't that high for lithium iron? I Assume nexcell is using some kind of nano technology to achieve higher C rates? If I drag race at every start how will that affect the cycle life?
     
  8. Rmay635703

    Rmay635703 Senior Member

    Joined:
    Oct 16, 2016
    2,567
    1,595
    0
    Location:
    Somewhere in Wisconsin
    Vehicle:
    2013 Chevy Volt
    Model:
    N/A
    Not really it gets hotter than that in the summer in northern Wisconsin

    Low temperatures are a much greater risk
     
  9. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,774
    4,372
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    We've tested reasonable below freezing temps this winter with Nexcell test packs in western most states and everything works great, but when it comes to extreme mid-west style temps of sub-zero, that's not been tested yet. Or maybe I'm mistaken?
     
  10. AzusaPrius

    AzusaPrius Senior Member

    Joined:
    May 27, 2020
    1,639
    766
    0
    Location:
    California
    Vehicle:
    2010 Prius
    Model:
    IV
  11. Rmay635703

    Rmay635703 Senior Member

    Joined:
    Oct 16, 2016
    2,567
    1,595
    0
    Location:
    Somewhere in Wisconsin
    Vehicle:
    2013 Chevy Volt
    Model:
    N/A
    I’ve seen a real -40F here in Wisconsin during my lifetime (not windchill) gotta wonder if you could damage operating frozen.
     
  12. vvillovv

    vvillovv Senior Member

    Joined:
    Mar 19, 2013
    3,493
    1,231
    1
    Location:
    NY
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    Lipo temp specs are getting better both high and low. Do some spec checks.
    But yeah, real low temps personally bothers me too. That's one big reason I used DrPrius to monitor them.

    Primes dash thermometer blinks for 5 seconds at or below 37 F after going into Ready or On mode.
    Wish I knew exactly why Toyota chose 37 F.
     
    #92 vvillovv, Mar 21, 2021
    Last edited: Mar 21, 2021
  13. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,103
    4,032
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    o_O
     
    vvillovv likes this.
  14. vvillovv

    vvillovv Senior Member

    Joined:
    Mar 19, 2013
    3,493
    1,231
    1
    Location:
    NY
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    O LOL - Just noticed ...... LiFePO
     
    Grit likes this.
  15. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,103
    4,032
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    lipo batteries are typically in cell phones and laptops, they are only good up to 200 charge cycles :cool:
     
  16. Rmay635703

    Rmay635703 Senior Member

    Joined:
    Oct 16, 2016
    2,567
    1,595
    0
    Location:
    Somewhere in Wisconsin
    Vehicle:
    2013 Chevy Volt
    Model:
    N/A
    And the ones in Samsung phones light on fire in your pocket
     
    Grit likes this.
  17. Vman455

    Vman455 Senior Member

    Joined:
    Feb 8, 2014
    534
    551
    13
    Location:
    The Middle
    Vehicle:
    2013 Prius
    Model:
    Two
    Probably to warn of the potential for ice on bridges. BMWs do the same thing.
     
  18. vvillovv

    vvillovv Senior Member

    Joined:
    Mar 19, 2013
    3,493
    1,231
    1
    Location:
    NY
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Plus
    BattleBorn (brand name) LiFiPo 12 volt 35 minutes of Lab setup for testing and too much data to process in that much time, unless not really caring much about how the stuff works. ymmv
    Don't Waste Your Money On Batteries - The Shocking Truth I Discovered When Testing RV Batteries
    Don't buy batteries until you watch this! Which RV or boat battery is best? We ran laboratory-controlled tests to determine the best RV battery type by power and cost. This video takes a look at lead acid vs lithium batteries, how much power and energy these batteries make, and what is the cheapest battery by energy provided. After watching this video you can decide which battery type is right for you because you will be armed with real-world battery data!

    Time Linked Index of Video in Description
     
  19. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,103
    4,032
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    that battery chemistry doesn’t exist.