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  1. nickceouk

    Lightest and most compact E-Bike charger 14s(DIY GaN charger research)

    I plan on E-Bike Touring and need to keep weight to a minimum. I will be carrying AC charger with me to top up where possible. Everything that can be made lighter is welcome and hence focusing on the charger. Two Batteries is 14s each. At the moment I use 2x 58.8v 4amps brick chargers...
  2. nickceouk

    New Gallium(GaN) chargers -any tangible benefit to ebike battery charging?

    I checked the Eltek Flat pack SHE against the Huawei R4850S1(98% max efficiency) rectifier. The Huawei rectifier was recommended and has a few threads on this forum. It's surprising that there is no real difference in size or specs between the two. High efficiency means less heat loss afaik...
  3. nickceouk

    New Gallium(GaN) chargers -any tangible benefit to ebike battery charging?

    The newer GaN wall chargers have been making rounds at CES 2020. The question I have is if there are any clear benefits to be had for portable ebike charging - 13s - 54.6v DC. 99% efficiency is what these things advertise ...how does this compare with standard brick charger used before GaN -...
  4. nickceouk

    20Ah li-on NMC cells UK London new boxed £12 each on box of 50 limited stock

    Used the cells I bought from James today and they performed very good indeed. The voltage drop I experienced(ebike) with other chemistry cells was much less noticeable with these. :thumb:
  5. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    Did a test with 13s 20ah cells today. I am guessing the added weight is under 25kgs but the results are challenging enough to put any more weight adding on hold. Wheelie's - yes definitely an issue. I gathered because I placed the added weight in a top box on the rear rack - the front hub is...
  6. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    Did a test with 13s 20ah cells today. I am guessing the added weight is under 25kgs but the results are challenging enough to put any more weight on hold. Wheelie's - yes definitely an issue. I gathered because I placed the added weight in a top box on the rear rack - the front hub is...
  7. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    I got 13 cells off James to test today. Come well packaged and from a new stack of 50. Female terminals are M3 size from what I found and I also ordered copper rivets to then thread myself with some copper strip 7mm width as a busbar etc. I have to wait about a week until I put everything...
  8. nickceouk

    20Ah li-on NMC cells UK London new boxed £12 each on box of 50 limited stock

    Thanks :D
  9. nickceouk

    20Ah li-on NMC cells UK London new boxed £12 each on box of 50 limited stock

    Not sure if the pm I sent you works as it s in Outbox and not going to Sent :? Can I do a local London pickup - 14 cells ? Pm me how with details - can do same day too.
  10. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    With rear rack or even this one on a suitable folding bike(with rear rack + panniers for gear Edit : Daga stroke - tilting cargo trike This one might just be it for me in terms of capacity and weight distribution (battery at its lowest point should improve stability and handling) The only...
  11. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    I messaged jimbob01 who sells them. Happy to avoid shipping charges, dangerous goods fees , handling &import taxes and the long waiting time. Had to recheck on the 30 min charge - 20ah cells charged at 10a(0.5c as per spec) would actually take 2 hours right? I would need to charge at 40a to...
  12. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    I am eyeing NMC 14s6p 7.5ah cells which will be about 13.5kg (each cell is 159 grams but it's a Chinese taobao seller so might be lighter/heavier due to misunderstanding on my side) 72v22ah 20s3p is just over 9.5kg mean cells weight. Here are the cells (white packaged shell)...
  13. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    I am laughing with you on this one :lol: :lol: :lol: 2160 wh NMC battery + 1 Huawei R4850G 3kw AC/DC DC rectifier - this is the 45 minute newish target after scrapping the 10 min. LTO. My current setup is feeling rough for awhile now - no suspension and a sturdy but heavy aluminium frame...
  14. nickceouk

    Hub motor on 240v DC ebike? Controller(MOSFETs), windings(phases)...

    There is someone on the other thread(before I started this one)and he claims 6 phase motor with some other eyebrow stuff to match :shock: https://endless-sphere.com/forums/viewtopic.php?f=14&t=104319&start=25#p1523855 I found a page while waiting and regarding more than 3 phases they were...
  15. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    Thanks, NMC cells - with 40min charging(or as close as I can get to that) is definitely where I am at. Switching chemistries to NMC cells(32650 at 7.5ah) means that 45ah will be about 12kgs(lowering my voltage to 48v while testing too 13s6p) 12kg is a half the original challenge and what a...
  16. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    Thank you for guiding me along the way. I started with a sketchy sketchy idea and now with all the input into account I gained better clarity on what's worth pursuing as well as how to make it happen. :D Some adjustments will be needed while charging and I do love the freedom to explore good...
  17. nickceouk

    Hub motor on 240v DC ebike? Controller(MOSFETs), windings(phases)...

    I am down to 2-3kw charging ball park - NMC/NCA route. Street EV charging is solid and a matter of time - who wants to wait through :o There are Type 1(3kw AC) and Type 2(7kw AC) chargers with good enough coverage to be worth tapping into for ebiking. There is also the gorilla charging...
  18. nickceouk

    Hub motor on 240v DC ebike? Controller(MOSFETs), windings(phases)...

    I should mention the other LTO thread that started this discussion https://endless-sphere.com/forums/viewtopic.php?f=14&t=104319 The series to charge parallel to hub motor idea is one of 3 options that emerged for me on that thread. Thanks for bringing the specifics and yeah safety comes out...
  19. nickceouk

    Hub motor on 240v DC ebike? Controller(MOSFETs), windings(phases)...

    This was a directed at hub motor design. No specifics unfortunately
  20. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    It's ok - these links still don't work for me but now I know what to look for AC-DC and DC-DC wise. The Huawei 3kw is genuinely intriguing :shock:
  21. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    Not all foldable bikes are flimsy and feeble : A variation on this fat foldable ebike type setup is a good candidate for touring plus maybe some public transport possibility. Powered by 6-8 tiger sharks and Street AC/DC recharging in 40mins ...it's a maybe for sure 8) The sharks could be...
  22. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    I get nothing on eBay when I search with the above number or the number in your previous post.
  23. nickceouk

    Hub motor on 240v DC ebike? Controller(MOSFETs), windings(phases)...

    Nothing I know of that can charge LTO packs in 10 mins worth mentioning...LTO are low density but can fully charge in 10 mins. The problem becomes more obvious when trying to fit everything on anebike scale setup. Is the basic idea of maintaining the ~1000 Watts 240v DC at 5 amps workable to...
  24. nickceouk

    Practical advice on achieving the 10min full charge LTO(Titanate) cells are meant to deliver

    Actual cells Li-NMC, NCA ...so yes please scratch the LFP 💯
  25. nickceouk

    Hub motor on 240v DC ebike? Controller(MOSFETs), windings(phases)...

    The hub motor is to drive an ebike with none trivial specs. The idea is that I should be able to drive a hub motor with 240v DC battery (100 lto cells in series or 67 cells log higher density cells 3.6v nominal). The controller would obviously need to be able to handle 240v DC switching and I...
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