Lithium conversion

Discussion in 'Gen 2 Prius Accessories & Modifications' started by Thumb, Apr 29, 2016.

  1. Thumb

    Thumb Junior Member

    Joined:
    May 17, 2015
    21
    1
    0
    Location:
    Greece
    Vehicle:
    2009 Prius
    Model:
    Three
    hello
    I am planning to design a new lithium battery for my 2006 Prius.
    I am thinking to use 18650 batteries but I am confused to the continius discharge current....
    I found a batteries with 40A continius discharge current.My question is how much discharge current I need for my battery?
     
  2. S Keith

    S Keith Senior Member

    Joined:
    Sep 4, 2015
    799
    291
    0
    Location:
    AZ
    Vehicle:
    2003 Prius
    I have seen discharge currents up to 120A momentary with 40-60A typical with somewhat brisk acceleration.

    Charge/regenerative currents up to 80A.

    Good luck. Please don't die in a fire from a poorly designed battery.

    I assume you're going to design an in-line BCM to monitor on the cell level and spoof the Prius BCM on its 14 voltage channels?
     
  3. Thumb

    Thumb Junior Member

    Joined:
    May 17, 2015
    21
    1
    0
    Location:
    Greece
    Vehicle:
    2009 Prius
    Model:
    Three

    So how can calculate how many batteries I need to have this discharge current??
    I am thinking to use it like plug in and not like main battery...
    I am searching to make the safest move.
     
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    56,319
    17,519
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    possibly search through other threads. someone in france has been quite successful, but the guy is an electrical genius. all the best!
     
  5. S Keith

    S Keith Senior Member

    Joined:
    Sep 4, 2015
    799
    291
    0
    Location:
    AZ
    Vehicle:
    2003 Prius
    You are in DEEP over your head. Give up now.
     
    strawbrad likes this.
  6. Thumb

    Thumb Junior Member

    Joined:
    May 17, 2015
    21
    1
    0
    Location:
    Greece
    Vehicle:
    2009 Prius
    Model:
    Three

    .??????
     
  7. S Keith

    S Keith Senior Member

    Joined:
    Sep 4, 2015
    799
    291
    0
    Location:
    AZ
    Vehicle:
    2003 Prius
    Based on your initial responses, it's clear you have little or no expertise in this area. Rather than do your own research, you're asking to be spoon fed massive amounts of information.

    I conclude you are not equipped to embark on such a task. It is best to abandon the project before it starts. You have at least a few hundred hours of research and work ahead of you that includes extremely basic information you appear to lack.

    You should either give up now or devote yourself to doing the research for yourself. I lean towards giving up due to your complete lack of understanding of the project scope and unwillingness to engage in your own research.
     
    strawbrad likes this.
  8. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    56,319
    17,519
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    go to the main forum page and scroll down to gen 2 prius accessories and modifications. just below, you'll see prius phev plug in modifications. some good threads there, including two by 'planetaire'.
     
  9. Thumb

    Thumb Junior Member

    Joined:
    May 17, 2015
    21
    1
    0
    Location:
    Greece
    Vehicle:
    2009 Prius
    Model:
    Three
    I am posting my thinking to learn and listen other opinions,if I knowing exactly how i can finish this project I don't ask anyone .i think
    The purpose of the forum is to discuss opinions.if you to help your opinion is welcome if you think you are so smart and you want to fooling and not help please don't waste you time
     
    bisco likes this.
  10. j12

    j12 Junior Member

    Joined:
    Oct 2, 2013
    5
    1
    0
    Vehicle:
    2005 Prius
    Model:
    N/A
    Keith was a bit blunt but he's right. It's not as simple as soldering together enough 18650 cells to roughly match the voltage of the NiMH pack. There is a ton more to it. If you're interested, I suggest googling and reading other ev conversions. There are tons and tons of resources out there, I learned a lot from ecomodder.

    If you want to play around with lithium vehicles start small with an electric bike or something. (I started with lithium rc planes and cars) and have moved on to a 1kw electric bike.

    There is now no real practical purpose to do lithium conversions of hybrid vehicles now, unless it's to learn. The investment of batteries, charging systems, BMS, etc are not cheap at all. Buying a used purpose built lithium EV can be had for about $8000 USD now.
     
  11. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    56,319
    17,519
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how is this project coming along?
     
Loading...