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  1. flippy

    TIG welding battery strips

    not really. they are too "violent" for the really senstive work as they give too hard of a pulse. its like tryng to close a glass door with a swing of a sledgehammer. personally i prefer laser welding. the control is insane and extremely localized. but again: not for us peasants at 20k a pop...
  2. flippy

    Charging LTO at Max Speed?

    its abosutely no problem to make a battery last 10+ years. i do so in a daily basis, its litteraly the core of my business. hell even the scooter my wife uses every day to drive 50 miles has done so for 7 years now and it still has 87% of its orignal capacity. you thinking you can get full...
  3. flippy

    Charging a portable power station from a Tesla Model 3

    Where would you connect the daygreen on?
  4. flippy

    Charging LTO at Max Speed?

    i am still missing WHY you need to recharge in less then 15 minutes after consuming ~1kWh of energy. it would seem that increasing the battery size would decrease the need for such a charging need. 160A does not change the metrics (or imperial :mrgreen: ) any better in practical terms. the...
  5. flippy

    Charging LTO at Max Speed?

    that was not the question. i asked what you actually -need- in power. that has nothing to do with charging. the voltage has nothing to do with safety. the amps you are taking about is a MUCH bigger problem here. 250A is enough to jump start 3 pickups at once. even the slightest loose...
  6. flippy

    Charging LTO at Max Speed?

    i am sorry, but is you goal to make something actually useful or just a experimental setup as a hobby to play around with over the weekends? or an experimental thing that you might want to use properly? this is important. i see a lot of people that see 1 or 2 things about a certain battery...
  7. flippy

    Running parallel battery pack. I need help please.

    i doubt you will get beyond 150 cycles with your planned setup. especially if you dont compress the batteries in a frame. the C rating on those batteries is fictional. please ignore. Its best to start a new thread for your situation.
  8. flippy

    Running parallel battery pack. I need help please.

    if you plan to make this your commuter scooter i would recommend getting different batteries. no way those will survive riding 40~50mph constantly.
  9. flippy

    Charging LTO at Max Speed?

    please ignore john fatty and chalo, they dont have a clear understanding of the basics and you end up in the woods like that. what you want is no a problem from a technical perspective. but the problem is amps mostly, this is what makes it so expensive so there need to be a good technical...
  10. flippy

    Running parallel battery pack. I need help please.

    not really , it will work and each battery will simply give depending on their internal resistance, but even the connectors and wires you are using to tie the batteries together are a factor. unless a bms trips i would not worry so much.
  11. flippy

    Running parallel battery pack. I need help please.

    it depends on what each battery can give. there are too many variables for that. the controller does not care in the slightest wich battery gives him the power nor does it have control over that.
  12. flippy

    is there a prob in this battery diy plan with prebuid case?

    there is no anode like in a akline battery. a 18650 cell is made up of a rolled up sheet. the "anti-cyclindrical" people here think that spotwelding damages the bottom part of the rolled up piece, completly ignoring the insulation and space there still remains. while it tehoretically is...
  13. flippy

    10s6p x2 or 20s6px1

    Always go with the higher voltage. Controllers only care about amps. So a 50A controller delivers double the power at 72V compared to 36V.
  14. flippy

    Building a large capacity battery for bicycle trailer

    then dont compare a reseller of used and/or fake cells with a actual offical vendor that sells certified original cells at MSRP.
  15. flippy

    TIG welding battery strips

    Not for you no. Not me either, or anyone else on this forum.
  16. flippy

    TIG welding battery strips

    The shops that use those types of welders dont allow cameras or phones to enter the work area. Should be obvious. I only know 1 company in my country that has a welder like that and they only do work for the millitary and sattelite manufacturing, and they got armed guards, so good luck whipping...
  17. flippy

    supercap battery boosting

    Sorry, it does not work like that in practice. If you have the space for supercaps you have the space for more batteries. More batteries gives you more everything so you dont need supercaps. If you have problems with voltage sag you need to change your battery, not bolt on more crap to offset...
  18. flippy

    TIG welding battery strips

    (as usual) you'd be wrong, tig and plasma-like welding styles is used in the very higest end of products. just not mass produced ones due to the cost and low speed. but you will see it in plenty of millitary gear like the hush-hush special forces electric 1~2 person submarines and most...
  19. flippy

    supercap battery boosting

    no, its useless in real world applications. this has been a topic of discussion for many years now and always with the same result: its stupid to do so. its like sticking your hand out a window to help you slow down. its basically never the battery that is the limiting factor. if you have the...
  20. flippy

    Building a large capacity battery for bicycle trailer

    you get what you pay for. fake cells are still fake cells. same goes with the used ones they sell. even if they sell "original" cells at a considerable lower price what i can get them for by my wholesaler that buys them by the container from the factory you cannot expect to get original cells...
  21. flippy

    Tab cooling prismatics.

    as i said, making a setup like that that works on a workbench is 100% not a problem. i have already done so and tried it. making one that can survive the shocks and viberations of a go cart for the packs lifespan is something else entirely. and yes, i am condecending because you need to check...
  22. flippy

    Tab cooling prismatics.

    Keep telling yourself that. :bigthumb:
  23. flippy

    Temporary precharge circuit

    XT90-S (dispite the name: not for applications above 45A continous)
  24. flippy

    Tab cooling prismatics.

    a peltier is only 5% efficient. so good luck with that :lol: you need 4kW of input power and heat dissipation to get 200W of cooling.
  25. flippy

    Tab cooling prismatics.

    dont worry about belittering me. i am often the one that gets the short stick for trying to keep everyone on the ground. there are too many people think they are on the same level as professor level structural and electrical engineers. you need simplifcation, you are not a car company that can...
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