Power in Flux

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  1. Replies
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    A whole 15KwHs such a nice large battery for an...

    A whole 15KwHs such a nice large battery for an electric bike.
    Got a side on view so we can see the length of the batteries.
  2. Thread: Ripperton's 8)

    by tomdb
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    No need to sync. Two controllers, with...

    No need to sync.

    Two controllers, with individual hall sensors. Since they are mechanically linked, one provides more torque they both speed up. Running motors in torque control there is no need...
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    Fitting them in that direction in a bike would be...

    Fitting them in that direction in a bike would be hard i bett. Do you have the vertical room to mount them smallest side down?
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    https://www.google.nl/search?q=bmw+i3+battery&sour...

    https://www.google.nl/search?q=bmw+i3+battery&source=lnms&tbm=isch&sa=X&ved=0ahUKEwic48ejqM3VAhWEI1AKHVqrAooQ_AUICigB&biw=1920&bih=950

    ...
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    http://automotoclassicsale.com/node/22141 even...

    http://automotoclassicsale.com/node/22141

    even one for sale
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    http://evalbum.com/5094 Almost the same, but...

    http://evalbum.com/5094

    Almost the same, but slightly more ludicrous.

    http://www.instructables.com/id/How-to-build-a-96-Volt-Electric-Motorcycle/

    even instructions on how to do it;)
  7. Thread: Tesla BMS

    by tomdb
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    What is a bit of fun with out some danger. Just...

    What is a bit of fun with out some danger. Just like any battery treat it with care and mount it in a safe housing.

    However the size still limits it into what vehicles you can stuff them.
  8. Thread: Tesla BMS

    by tomdb
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    https://endless-sphere.com/forums/viewtopic.php?f=...

    https://endless-sphere.com/forums/viewtopic.php?f=14&t=88862

    fits in a vectrix :D
  9. Thread: Tesla BMS

    by tomdb
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    To be fair EV west have no clue what they are...

    To be fair EV west have no clue what they are doing. These are not the "safe" Lipo cells they are used to.

    Please do not go without a cell voltage monitor.
  10. Thread: Tesla BMS

    by tomdb
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    https://hackaday.io/project/10098-model-s-bms-hack...

    https://hackaday.io/project/10098-model-s-bms-hacking

    The slave modules on the tesla battery modules are cracked. I am currently working on getting some code for the Teensy family working with the...
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    Want to know a secret. :cool: This was my...

    Want to know a secret. :cool:

    This was my first smd board I ever designed. And only my third pcb design, other two were single sided etched ones. That is why it took me 3 tries.
    Is the SPI...
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    Yes/no. this means that you battery negative will...

    Yes/no. this means that you battery negative will be the only negative, so no isolation of you hv battery.

    It will work but depending on what you want to do this might cause issues.
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    You need to isolate the ltc6804 and uno from the...

    You need to isolate the ltc6804 and uno from the other ltc6804's otherwise you can have shorts.
    Anything is possible, Take it one step at a time.
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    definitely worth the price. Good read, and indeed...

    definitely worth the price. Good read, and indeed focused on the true innovators in this field. A lot of the text gets backed up by real quotes and stories from people who where part of it.
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    Nice bms boards. Please be mindful of the face,...

    Nice bms boards. Please be mindful of the face, that when interfacing with the bq76 your micro will have to be tied to the pack negative (or atleast the negative of what ever bms board you are...
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    Currently working on a simple master bms board....

    Currently working on a simple master bms board. Will build a test setup once that is complete.
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    This is really good to know, now just need to get...

    This is really good to know, now just need to get my license.

    Now some good weather to get miles on it
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    I would just add the 208, since the power rating...

    I would just add the 208, since the power rating for those is already way more then plenty for the range of motors you have so far.
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    http://www.enstroj.si/Electric-products/emrax-200....

    http://www.enstroj.si/Electric-products/emrax-200.html

    Emrax 207, 80kw peaks at 9.4kg
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    I have bought a new inverter to use as the...

    I have bought a new inverter to use as the powerstage this time from a chevy volt / opel ampera.

    Two 600amp stages so it should be good enough for what ever motor I currently own. Took me some...
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    https://www.youtube.com/watch?v=pgPT-Rt6hKk ...

    https://www.youtube.com/watch?v=pgPT-Rt6hKk

    The Honda IMA stage kick up way to much EMC so looking for a true full metal cased inverter. Have a Rinehart pm100dxr laying around, but that will be...
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    Of course it does, I would say look at the way...

    Of course it does, I would say look at the way the arduino boards (or breadboard arduino's) are designed and copy that.
    Are you attempting to make a BMS based on the LTC6804 too?
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    Did some more playing with the controller. Got a...

    Did some more playing with the controller. Got a new motor today, deal was too good to pass up, a Lexus rx350h/rx400h rear motor.

    Did some playing with the controller, turns out that I set a...
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    Tested the controller with two packs in series to...

    Tested the controller with two packs in series to give me roughly 110V. Oh boy does this motor want to go now, need to ofcourse do some tuning on the motor controller combo once I am happy with...
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    Yes i am just feeding in 5v pwm signals (6, high...

    Yes i am just feeding in 5v pwm signals (6, high and low per phase) and tapping off the analogue output from the phase current sensors.

    Got a document with all my reverse engineering I did so far,...
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