Power in Flux

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Type: Posts; User: BaldBruce

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    Ignore the charts in the data sheet. They show...

    Ignore the charts in the data sheet. They show where and when they did their ESR measurements and are not useful to your calculations. Also, do not use absolute max from any electronic part data...
  2. 3/4 of the way towards his target. Please...

    3/4 of the way towards his target. Please consider funding a dedicated electric motorcycle junkie and his deserving project. I don't comment very often, but this project is worth backing!
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    This is a great point to make with people who try...

    This is a great point to make with people who try to argue against the value of using electric vehicles! I use the line "Just give me the energy you wasted to produce your gasoline. I'll run my...
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    Quick question Noah, If these are new units, why...

    Quick question Noah,
    If these are new units, why do they measure 58 and 59 Ah? I have some 3 year old units and they measure almost exactly the same Ah as yours.......
    Great batteries or are yours...
  5. I also use a Vicor, but wanted it to be...

    I also use a Vicor, but wanted it to be completely off in storage and enabled by the key switch durring normal operation. My solution was to use a switch hidden in the bike that interrupts the 72V to...
  6. Yes, a swiched reluctance motor can be more...

    Yes, a swiched reluctance motor can be more efficient than an induction motor. Yes, a SR motor can be cheaper in principle than an induction motor. But, the math doesn't add up. Think about what they...
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    But my third cousin heard from his best friend...

    But my third cousin heard from his best friend that we had to break in cells before we use them!:eek::eek:
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    Very nice demonstration. I love data over people...

    Very nice demonstration. I love data over people typing themselves smart.
    Might I suggest your next step? Run cell number 1 through the 1C/5C regime and see if there is any difference to cell number...
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    Forming happens the most on the first TWO cycles...

    Forming happens the most on the first TWO cycles with LiCo batteries. I have done pretty exhaustive studies in that area to try to speed up manufacturing. Can't speak for any other Li battery, but no...
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    Thanks for sharing the data! I know everyone...

    Thanks for sharing the data!

    I know everyone takes it easy on their cells at first. Myself included. Probably a smart choice for all the new parts in a bike rebuit for it's new EV life. But where...
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    Cool vehicle that might convince people who...

    Cool vehicle that might convince people who currently drive SUVs to convert to electric! They showed a prototype in 2012 and predict actual production in 2015....
    Also keep in mind that this is...
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    Ted, your opinion that discussing battery fires...

    Ted, your opinion that discussing battery fires propagates the myth has some validity, but isn't it more important to use these types of events as teaching moments? The slew of videos you posted...
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    Just wanted to point out the obvious. Not all...

    Just wanted to point out the obvious. Not all Lithium chemistries are equal. Tesla chose high energy and high power (LCo and NCA) and thus they can and do catch fire if mutilated. This is not true of...
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    Do not just read an abstract of a patent and form...

    Do not just read an abstract of a patent and form a validity argument!

    This is a method patent on how to use two different batteries and control their SOC. I copy directly from the only...
  15. Thread: THANKS MIKE!

    by BaldBruce
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    Thanks Mike! Real question is how cranky was...

    Thanks Mike!

    Real question is how cranky was Ted without his daily ElMoto fix?:D
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    Always heatsink your controller IMO. They are...

    Always heatsink your controller IMO. They are roughly 90 to 95% efficient. Sounds good untill you calculate the power loss in watts it needs to dissipate. Lets assume 5% loss at max power. 96V * 250A...
  17. Podium!...

    Podium! http://www.examiner.com/article/bostrom-wins-eroadracing-at-laguna-seca-kluge-2nd-johnson-3rd
  18. Paypal sent. Have a great trip!

    Paypal sent. Have a great trip!
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    O-----H------I------O :cool:

    O-----H------I------O
    :cool:
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    We understand Dave. You're happiest when it's...

    We understand Dave. You're happiest when it's barely above freezing...
  21. Thread: Today, I ...

    by BaldBruce
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    Mowed the lawn with my LiFePO4 converted tractor....

    Mowed the lawn with my LiFePO4 converted tractor. 48V 60Ah of CALB.
    44934494
    I know it has to many wheels and only goes 5mph, but the EV grin is similar....
  22. Thread: Tesla

    by BaldBruce
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    I had a limit sale at $75.00 for half my shares...

    I had a limit sale at $75.00 for half my shares and never thought it would kick in! Hit over 75 this afternoon.

    As several have alluded to, be careful with a stock this volital. The shorts and us...
  23. So we could sum up all three of your rules as one...

    So we could sum up all three of your rules as one golden rule:

    Efficiency matters. Going the farthest and the fastest is about optimizing for minimum waste of energy and power.
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    Rigidbot just passed the 750,000 funding level! I...

    Rigidbot just passed the 750,000 funding level! I know this because you guys hooked me on buying a kit.
    Thanks, I think......:O
  25. Thread: Tesla

    by BaldBruce
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    Own a few at $25. Go TESLA! Shorts are...

    Own a few at $25. Go TESLA!

    Shorts are running for the hills in a classic short squeeze.
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