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INCREASING A PRIUS PERFORMANCE WITH ANOTHER HV BATTERY? JUST THINKING MIGHT BE POSSIBLE

Discussion in 'Gen 2 Prius Technical Discussion' started by Dxta, Nov 5, 2017.

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  1. Dxta

    Dxta Senior Member

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    people! I'm just wondering, if the performance of any gen2 Prius can be increased using another HV battery(increasing the voltages).

    I already understand that Toyota typically designed the Prius from bottom up, for basically for less emissions, and gasoline cost savings, with some little HP available.

    Here's what I'm thinking:
    Since a Prius electronics, or HV ECU has being configured for its current 201+...volts from the HV battery, isnt it possible,

    1)for a highlander battery, with same capacity(6.5Ah), and nominal voltage of 9.6V to be added along side the stock HV battery of the Prius, inorder to produce more torque for either of the MG 1/2?

    2) or alternatively, can I use one of a highlander pack(24modules rated at 9.6volt=230.4volts combined)?

    3) if any of the above were possible, I guess the HV wiring harnesses, ECU would have to be replaced with ones that could bear the load(current. Although, current would still be same).


    PS: Using some of the highlander battery pack(the 2* 12modules), should reduce the space the stock Prius pack occupies.

    I know incorporating electric motors on the rear wheels would also add more HP.

    I'm specific about additional batteries (whether some of the highlander, or otherwise)
    @MTL_hihy . Can you chip in some word or two, since you've worked extensively on hybrid highlanders?
     
    #1 Dxta, Nov 5, 2017
  2. bisco

    bisco cookie crumbler

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    anything is possible. :cool:
     
    #2 bisco, Nov 5, 2017
  3. Dxta

    Dxta Senior Member

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    Well, bisco! You're always giving SUMMARISED ANSWERS:D. I need technical inputs from you on its workability. Remember, this is still in its IMAGINATION stage(s).
     
    #3 Dxta, Nov 5, 2017
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  4. bisco

    bisco cookie crumbler

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    sorry, technical is above my pay grade. skeptical is my m.o., the problem is, we have seen lot's of ideas come through here, but no one ever follows through after realizing the amount of work involved.

    for instance, we got a guy in another thread who is going to install gull wing doors and a diesel engine.:rolleyes:
     
    #4 bisco, Nov 5, 2017
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  5. Prodigyplace

    Prodigyplace Senior Member

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    #5 Prodigyplace, Nov 5, 2017
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  6. Dxta

    Dxta Senior Member

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    What? Gull blablabla and a diesel engine?:mad::(
     
    #6 Dxta, Nov 5, 2017
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  7. Prodigyplace

    Prodigyplace Senior Member

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    Thread is here.
    Gullwing Doors | PriusChat

    The DeLorean, for instance, had gullwing doors.

    upload_2017-11-5_14-46-45.jpeg
     
    #7 Prodigyplace, Nov 5, 2017
  8. Kevin_Denver

    Kevin_Denver Active Member

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    The ECUs in the Prius coordinate the working of the two electric motors and ICE. The programming involved in making everything work together is very complex and likely involved a large engineering team at Toyota to make it work. It's not practical to think a single person could create new ECUs for the Prius to manage the HSD systems. Therefore the approach taken with aftermarket battery packs is to send a fake signal the ECU to make it think the battery is at ~100% and then wire a power supply connected to a large lithium ion battery wired in parallel with the existing HV battery to feed current to the system. The Prius ECUs are pretty happy to feed ~30A of current to the motors all day, until the extra battery is depleted, at which point the systems disconnect an the car behaves as normal.

    The Enginer battery systems worked like this: Enginer | Prius Plugin PHEV Conversion Kit with Lithium-Ion | Hybrid

    However with the cost of these aftermarket systems, there's no real reason to buy one today. I would just go buy a used/new plug-in Prius/Prime/Volt instead.
     
    #8 Kevin_Denver, Nov 5, 2017
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  9. Shane Burns

    Shane Burns Member

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    I saw a video where they have a Prius with 3 yes... THREE HV batteries with the gas engine removed. Very interesting... so yes anything is possible!
     
    #9 Shane Burns, Nov 5, 2017
  10. bisco

    bisco cookie crumbler

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    agreed!(y)
     
    #10 bisco, Nov 5, 2017
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  11. bisco

    bisco cookie crumbler

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    let's see, 3 hv batteries = 3 miles, then you have to recharge them.(n)
     
    #11 bisco, Nov 5, 2017
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  12. Raytheeagle

    Raytheeagle Senior Member

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    You were probably tagged as a realist and not an optimist throughout life I bet:whistle:.
     
    #12 Raytheeagle, Nov 5, 2017
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  13. bisco

    bisco cookie crumbler

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    yep, see myself that way too. can't teach an old dog new tricks. on the plus side, i'm rarely disappointed.:cool:
     
    #13 bisco, Nov 5, 2017
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  14. Raytheeagle

    Raytheeagle Senior Member

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    How’s your rotator cuff doing?
     
    #14 Raytheeagle, Nov 5, 2017
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  15. jerrymildred

    jerrymildred Senior Member

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    You probably don't see the spectacular and awesomely wondrous advantages of daylight savings time either. :ROFLMAO::D:ROFLMAO: Anything is possible but not everything is useful.
     
    #15 jerrymildred, Nov 5, 2017
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  16. bisco

    bisco cookie crumbler

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    yeah, not a big fan of 04:30 darkness. at least you folks have an extra hour of light down there.:)
     
    #16 bisco, Nov 6, 2017
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  17. bisco

    bisco cookie crumbler

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    great, thank you. 5th month anniversary this week, only 7 to go!(y)
     
    #17 bisco, Nov 6, 2017
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  18. Prodigyplace

    Prodigyplace Senior Member

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    How are we ever going to survive when you get back to working IRL? :eek:
     
    #18 Prodigyplace, Nov 6, 2017
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  19. MTL_hihy

    MTL_hihy Active Member

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    Its a great thought but the issue is that this setup probably won't play nice (you can't just match total voltages because the ECU checks them by block, thus the Highlander pack would be the same total voltage but the blocks would mismatch) with the Prius ECU without doing some serious custom work. You'd be far better to double or triple up on Prius packs to extend your range because it would be far easier technically to make them work without getting too technical in the process. It's sort of like daisy chaining RC batteries for both charging and discharging. You would need to do regular grid charge top ups to ensure none fall behind in use but it would definitely work (although you'd need to give up some trunk space to do it).
     
    #19 MTL_hihy, Nov 6, 2017
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  20. Dxta

    Dxta Senior Member

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    That's y I had to wait got your inputs
     
    #20 Dxta, Nov 6, 2017
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