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  1. jonescg

    2024 MotoE season - technical interview with Roberto Cane

    https://www.epaddock.it/en/interview-with-roberto-can%C3%A8-director-of-motoe-project-at-ducati/ "Absurdly, if the V21L had cells working at maximum temperatures increased by 20°C or 30°C, we would completely remove the cooling system: radiator, ducts, channels inside the battery, and liquid...
  2. jonescg

    Perth EV Expo, November 3rd-5th

    The AEVAs annual conference and EV expo is on this year in Perth! Come to the Perth Convention and Exhibition Centre in Perth CBD for this free event. Expo is free, but the Friday conference is ticketed. Lots of electric cars, bikes, boats, planes, buses and more! Test drives/rides, charging...
  3. jonescg

    DIY Quadricycle ideas - 100 V controllers?

    Hi all, some of my students are looking into building an electric quadricycle and I've told them I'll provide a battery (I've got a 6 kWh, 88 V nominal 24s pack which weighs 33 kg - from the Prelude project). Are 100 V controllers common enough? I might get a couple of 1000 W hub motors and...
  4. jonescg

    Making ES Friends IRL - Poll

    Hi Everyone, I've had the joy of being on Endless Sphere since 2009 and in that time, learned so much, built so much and made stacks of great friends. The funny thing about the internet is that we can form a tight community without the in-real-life meetings we'd normally have. But if you've...
  5. jonescg

    e-bike battery, pouches and 18650 cells for sale - Perth WA

    HI everyone, I've got stacks of leftover 18650 cells for sale. I'd buy 1000+ of them, build a battery and have like, 70 left over. Not enough to start a new project, but too many for a simple project. Red cells are Panasonic NCR18650BD cells (60 of them) - 3200 mAh and 3C continuous. $200...
  6. jonescg

    Melbourne - E-moto and E-bike technicians wanted!

    Hi everyone, Brad from Braaap motorcycles in Melbourne is looking for some electric motorbike / electric bicycle / EV technical assistance. He's got a team of mechanics who do a lot of work on their gas range, but are often stumped with the electrical troubleshooting. He needs someone to train...
  7. jonescg

    jonescg's battery builds (historical reference - image heavy)

    I've decided to put this thread together as my original thread was in the For Sale section, and it was quite reasonably deleted along with hundreds of other threads which were taking up space. So it makes sense to put the details here. Table of contents: My first electric motorbike battery -...
  8. jonescg

    Gazelle Chamonix conversion

    Hi All, So I will be convering my wife's step-through Dutch bike (aka tall person's bike) to electric. She's got an electric ladies bike but doesn't ride it much as its not exactly a sturdy machine for longer trips. The Gazelle frame always suited her as she's quite tall, but it was never an...
  9. jonescg

    jonescg's cylindrical cell build thread

    I've got a LiPo build thread in the for sale section which folks are welcome to check out - It's a long running study in the best (or rather, least worst) way of assembling a LiPo pack with multiple cells in parallel. I have recently started building battery packs using cylindrical cells...
  10. jonescg

    China trade difficulties?

    Has anyone here on the Sphere had trouble buying stuff out of China? I've been given the root-around trying to buy some 63 Ah LG pouch cells from these guys: http://vodno.en.alibaba.com/ After sending them US$2424.40 back in June, they assured me the cells were on their way. 3 months later...
  11. jonescg

    14s7p 18650 battery pack, potted. Australia.

    I built this some time back but only just finished it. It's a 14s7p battery built using Panasonic NCR18650GA cells spotwelded with nickel. It's got fly-wires for a balance port, but I've left it in case a specific BMS is wanted. The battery has been potted in West Systems epoxy resin, so...
  12. jonescg

    Cylindrical cells - How do you do your final terminations?

    I recently re-packed an e-bike battery for a friend using 18650 cells, and while the hexagonal Kart kit was a dream to work with, the final terminations had me scratching my head. I ended up spot-welding the last parallel cells with excess tab and soldered heavier gauge wire to it - maybe 2.5...
  13. jonescg

    Tesla video (with interesting shots)

    https://chargedevs.com/newswire/documentary-offers-some-new-footage-from-teslas-gigafactory-but-you-might-want-to-mute-the-sound/ The words don't match the pictures (hence the advice to turn the sound down) but what caught my eye was the battery being assembled at 3:49 An axially cooled...
  14. jonescg

    Question for the Perth (Australia) e-bikers

    Just curious as to how much battery you'd need for an e-bike capable of Perth Hills to Curtin uni and back (or charge at work). I'm keen to push for a sealed path which cuts through Mundy park and reduced the trip by at least 5 km. Gravity alone will demand 100 Wh worth of battery, so I'm...
  15. jonescg

    Charged EVs Virtual Conference Sep 1-3

    https://chargedevs.com/conference-sessions Some really interesting stuff to be presented here - sign up and tune in if you can. For those of us in distant time zones we might be lucky enough to get recordings. I'm particularly interested in the battery recycling side of things, as well as the...
  16. jonescg

    Temperature and capacity loss in LiFePO4

    https://www.sciencedirect.com/science/article/pii/S0013468617306060 A very interesting read on degradation in the form of capacity loss at different temperatures. Interesting the nature of charging and discharging at different temperatures.
  17. jonescg

    Article in The Australian

    https://www.theaustralian.com.au/nation/push-to-charge-ev-drivers-for-road-use/news-story/42359e970afcb369629414590ececda0 Paywalled, so only Beastie is likely to have a subscription. Yours truly and his Ioniq pictured for the story. Frustratingly, I was totally misquoted on the fuel excise...
  18. jonescg

    Capacity testing 18650 LFP cells

    Hi all, I need to capacity test about 100 LFP cells, and DCIR. I have some 4-cell testers but they are designed specifically for Li-ion chemistries like Li-NMC and Li-Co and take the cells up to 4.2 V. Does anyone know of a good option for LFP cells at 3.2 V nominal, and 3.65 V max?
  19. jonescg

    Perth Electrikhana 2020 - Canning River Eco Education Centre, March 7th

    Can you believe the Perth Electrikhana has been running for TEN YEARS! We've been showcasing electric cars, bikes, motorcycles, scooters, go-karts and just about anything electric since 2010. We've come a long way. https://www.electrikhana.org/wa.html Bookings for test-drives can be made...
  20. jonescg

    OSU electric motor

    Not sure if this has been posted already, but NutsandVolts (aka Kyle's) old alma mater has been busy working on a crazy motor...
  21. jonescg

    1988 Honda Prelude conversion - fastest build log ever.

    Well it's only the fastest build log because it's the first time I've started a build log here on Endless-Sphere. If you want to read the whole lot from start to finish, look here: http://forums.aeva.asn.au/viewtopic.php?f=18&t=5502#p67017 But in a single post I'll document it here. A...
  22. jonescg

    Australian EV Association's 46th Annual General Meeting and AGM - Sydney this weekend!

    Hey everyone, The AEVA's annual electric vehicle expo and annual general meeting will be held at Sydney Showgrounds this weekend (26th and 27th of October). https://www.theevexpo.com/ We're running a test driving and riding (ebikes aplenty) out the back too, so please come along and show your...
  23. jonescg

    Wire Bonding machines

    Has anyone here in the e-bike manufacturing world bought an ultrasonic wirebonder for terminating cells? It's a big ticket expense, so I'm expecting to only hear from larger e-bike manufacturers, but the company I work for is looking at buying one with a working area of about 500 x 900 mm. I'm...
  24. jonescg

    Grid tie inverters and HV battery

    Hi All, A question came up on another forum about testing battery packs. Lots of people will have a 100-400 V battery they would like to load test, but a decent load for a high voltage battery can be hard to come across. So the suggestion was to feed power into the grid using a solar grid-tie...
  25. jonescg

    Congratulations chemists!

    John B Goodenough, M Stanley Whittington and Akira Yoshino, chemists who published the seminal work on lithium ion batteries in 1980, were awarded the Nobel Prize for Chemistry. https://www.abc.net.au/news/2019-10-09/nobel-prize-in-chemistry-for-lithium-ion-battery-development/11588298...
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