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  1. whatever

    Hilleater ebikes vancouver on this forum?

    Not sure if hilleater ebikes vancouver watch this forum? but I found some info they posted on an old phylion 36v pack rather helpful, just a shout out to them for keeping their old info on the net, this is the info I found useful phylion 36v old prism cells pack I got a couple of old phyliion...
  2. whatever

    Mosfet swap

    I'm working on a Shopride mobility scooter, 24v brushed motor and very nice old controller ( 1997 approx)made in england ( Penny and Giles Drive Technologies Christchurch, Dorset UK). While checking the controller board for damage I noitced a small burn mark on the back of a small mosfet, the...
  3. whatever

    brushed controller with regen?

    Are there any el-cheapo brushed controllers with regen out there? 24v 20-30amps, mobility scooter rebuild without eletric brake which wastes energy
  4. whatever

    Convert standard charger to balancing charger

    This thread probably wont be of interest to those knowledgeable on bms boards, but it might be of interest to someone wanting to convert there standard charger to a balancing type charger. I'll start from the end point and go backwards how this came about. I'm guessing most premade battery packs...
  5. whatever

    new battery case idea no welding/soldering

    just came across a startup in brisbane, they've just recieved significant govt funding also, but the idea is cylinderical cell cases that make assembly and dissassembly quick and easy, its a very nice idea. It looks like the contacts are pressure based, heres a video might be of interest to some...
  6. whatever

    power-assist forum does it still exist?

    anyone know if power assist forum still exists was just looking for it on google and cant find it, probably only the long term users will remember it, it was for-runner to this forum, at some stage (cant remember what year) most of the power assist folk swapped over to endless sphere and the...
  7. whatever

    Self balancing charger idea: diy using tp4056

    I've found the tp4056 boards extremely useful for charging individual 18650 cells, there are two version so of this board, a basic one, and a better one with a couple of chips on it, the more complex board is much better and they are extremely cheap ( around $50c aud per board). Here is my idea...
  8. whatever

    Mosfet hole cleaning solder out

    Might seem pretty obvioius to some, but here is my method for cleaning out the holes in circuit boards that are filled with solder when replacing mosfets. I just get a safety pin which is approx same diameter of the hole, just a little bit smaller. Put the pointy end of safety pin on the hole...
  9. whatever

    mosfet testing 2022

    I did a thread on mosfet testing back in 2010 which showed a simple method for tested mosfets using 12v battery and lightglobe, its quite reliable way to test them. ( the old thread: https://endless-sphere.com/forums/viewtopic.php?t=19585 ) anyhoo added some additional info for using led to...
  10. whatever

    HobbyKing Eco8 charger teardown/mods

    After doing some repairs on old chargers ( icharger 208b and turnigy accucel 8150) I decided to open up a working HobbyKing eco 8 charger ( all chargers are 8s 150watt and all basically do same thing) just to see how it compares to those two. Turns out the hobbyking is imax rc brand written on...
  11. whatever

    turnigy accucel 8150 old charger repair

    TURNIGY ACCUCEL 8150 is model name So I was using an old turnigy charger the other day on a 7s 10ahr pack ( 24v nom), and I think I put the wires back to front, got a bigger than usually spark, a loud crack and smoke from inside the charger. Charger got stuck on reverse polarity on screen, and...
  12. whatever

    can bus networks

    so I did't own a car for over 10 years or so, used ebikes. Now getting older and getting back in to ice vehicles. I find that can bus is used to control just about everything in cars. I had no idea, didn't even know what a can bus was. I was vaguely aware you could send multiple signals down...
  13. whatever

    recharge amphour reading meaning

    I have two lots 24v 10ahr in series, runing 48v ebike. After my normal ride ( 4km very approx), both 24v packs are down to same voltage or very close to same voltage, but when I recharge there is quite a difference in ahr it takes to fully charge each pack. What information about the packs can...
  14. whatever

    soldering nickel turns out to be simple

    I've always had problems soldering nickel coatings, watched a video on youtube showing a commercial acid being used, thought I would try some rust converter I had lying around ( happens to be phosphoric acid), and bingo, just a little of it and the solder sticks extremely well. Also makes...
  15. whatever

    soldering aluminium

    just came across a very nice way to solder to aluminium, not sure what sort of amperage it would handle, guessing would be ok for pretty high amps but only guessing. Its a very simple method to coat the aluminium with a thin copper layer first before soldering...
  16. whatever

    converting from gas to electric economy

    Just some thoughts I've had recently. Seems the goal now is conversion from gas ( petrol ) based transport to electric, and it looks like this might actually occur, maybe in the next 20 to 30 years. Quite remarkable really that we are living in the beginnings of a transition period. There are...
  17. whatever

    lead acid battery made by hand

    heres a very interesting detailed video of how lead acid batteries are rebuilt in 3rd world setting, looks india or similar country. https://www.youtube.com/watch?v=VEvPjOKkPyE i dismantled a lead acid car battery some years ago, wasn't very careful and landed up some slight lead poisoning...
  18. whatever

    lithium battery factory in australia

    Lithium Battery Factory begins construction in australia ( tomago nsw) see https://www.pv-magazine-australia.com/2020/10/13/energy-renaissance-lithium-ion-gigafactory-breaks-ground-in-tomago-nsw/ I wonder how does it come about that a multimillion dollar project such as this just appears from...
  19. whatever

    Tesla 4680 tabless battery

    My thoughts on what it is: first pic shows top and bottom are aluminium and copper, heat transfer to top and bottom without going over the plastic separator between copper/aluminium, basically heat goes to the ends. so basically electrical path is same length as heat transfer path ( that is the...
  20. whatever

    parallel cells battery monitor idea

    just trying to think of some way to monitor a very large array of cells such as tesla pack for temperature. Some simple way to identify if any cells temperature goes too high. Came up with one idea that might work as follows. Model S battery pack has a plastic cover ( clear ) over the cells as...
  21. whatever

    formation charge of sei layer in lithiums

    just looking into formation charging regimes for nmc type lithiums. an interesting paper showing how to shorten formation charging times can be seen here: https://www.sciencedirect.com/science/article/pii/S0378775317300113 this pic sums up the method...
  22. whatever

    novel method battery discharge

    this guy has a really good method for discharging a battery using a high power mosfet in water, using one mosfet he discharges 1kw might be useful for high current discharge tests https://www.youtube.com/watch?v=QzdIjkhqM7Y&feature=youtu.be
  23. whatever

    diy bms stuart pittaway

    just doing a bit of research on powerwall style battery pack, and came across some really nice diy bms boards, very suitable for ebike applications. Pretty much an cheap alternative to something like Batrium. Anyone else had any experience with these? this video shows how they are used...
  24. whatever

    48v 20ahr aliexpress jungla brand

    anyone experience with these, they are cheap https://www.aliexpress.com/item/4000596239155.html
  25. whatever

    antonio zonardo italy

    if your still on this forum antonio, your email has been hacked, or someone pretending to be you, just got an email that said it was from you but it linked to some scammers site.
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