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  1. Diamondback

    Lithium battery upgrade for mobility scooter

    Apart from the soldering of the battery and charge wires it was a straight drop in. With a small change to the battery mount and hold down. Once the brushes were sorted, it never had any more issues starting. Or hill climbing. In fact it climbs hills now better than it did with the SLA...
  2. Diamondback

    Lithium battery upgrade for mobility scooter

    This is the first ping battery and bms I’ve used in a scooter. Given it’s fairly low power requirements, it’s been fine. If we had the money I would have liked to have added the larger AH battery for extra range. But at around 30km or so from the one we got it’s more than enough for his...
  3. Diamondback

    Lithium battery upgrade for mobility scooter

    Update. I spent a few hours today on the scooter. I pulled the motor and removed the armature and brushes. There definitely was some wear and dirt. I polished the commutator and polished the brushes with fine emery paper. Splashed some shellite around also to help clean out the casing and...
  4. Diamondback

    Lithium battery upgrade for mobility scooter

    I tried to get the rear wheel off today and failed. I don’t have a long enough tool to get enough leverage on the nut. And without the wheel off the motor can’t be removed. So I’ll have to see if i can get to the brushes without removing it. There is a black rubber weather proof cap on the...
  5. Diamondback

    Lithium battery upgrade for mobility scooter

    Yeah. The motor is on a transaxle between the rear wheels. Looks fairly well sealed, though the rubber Boot that seals the motor is not seated properly. I’ll continue investigation tomorrow. I will plug and unplug all the main power wires going to the controller and motor and see if that...
  6. Diamondback

    Lithium battery upgrade for mobility scooter

    Here’s what I’ve found so far. Leaning more and more towards motor and or brushes. Under load, to the point the scooter actually stops moving, (tested on a hill in reverse so worst case scenario) voltage drops to 25.9V. On a fully charged lifep04 ping 24V pack. Pack was resting voltage...
  7. Diamondback

    Lithium battery upgrade for mobility scooter

    Thanks for the tips. I’ll be taking a close look at it today and try to see what’s causing it. I’ll start with the motor brushes. As i Suspect that’s the most likely thing, given how new the battery is. I will report what I find. Jason.
  8. Diamondback

    Lithium battery upgrade for mobility scooter

    Hi all. I’m back. The lithium upgrade went well with a range of around 35km on a full charge. But we have a new issue now. About a week ago, he managed to get it a little wet. Not flooded. But he did get caught in light rain. Now when starting off there is a bad shudder. Once moving it’s...
  9. Diamondback

    Lithium battery upgrade for mobility scooter

    Cool idea. Thanks.
  10. Diamondback

    Lithium battery upgrade for mobility scooter

    The battery has been installed and works great. First full charge got him just over 30km range and the battery took roughly 27ah to recharge. Plenty of range. Now all I need is to find a decent SOC meter for it. Doesn’t need to be a current shiny type. Just based off voltage would do. So he...
  11. Diamondback

    Lithium battery upgrade for mobility scooter

    I didn’t know about the drop in option. I’ve already ordered the ping battery. So have to make that work. This particular scooter only uses the 2 pins on the xlr plug. It’s a cheap Chinese import. (Cheap is relative when it comes to mobility scooters) Good point about the weight. Hadn’t...
  12. Diamondback

    Lithium battery upgrade for mobility scooter

    Not with the way he drives already. Lol. I could hide a “turbo” button somewhere though ;) Jason.
  13. Diamondback

    Lithium battery upgrade for mobility scooter

    Thanks. I like the 4 pin idea. Edit. Thinking about it, I should be able to achieve this using the current 3 pin xlr charge plug it has now. The negative side of the fan can run to the battery charger directly (scooter side) and the positive line in the charger side plug can be bridged to...
  14. Diamondback

    Lithium battery upgrade for mobility scooter

    A thermo switch hadn’t really occurred to me. , but given where we are, summer often sees days much hotter than 30°c so would have to be careful that a temp switch doesn’t drain a parked up battery either. The charger we have coming is a 4A unit. And the scooter is only 400W brushless dc...
  15. Diamondback

    Lithium battery upgrade for mobility scooter

    Hi all. It’s been quite some time since I posted anything in the forum. Life kinda got In the way. My father (79) has a few health issues and few years ago I bought him a scooter. It’s a 3 wheeler. It has 2x12v sla 28ah (supposedly 28ah) batteries in Series for 24v. The lead is not giving...
  16. Diamondback

    Aussie 200 Watt Limit Thread

    Re 3rd party insurance. Different states do things very differently. If you are driving an unregistered vehicle in nsw,you have NO 3RD party insurance. It's the way things are here. Jason.
  17. Diamondback

    Aussie 200 Watt Limit Thread

    That's a shame for you. Just one of my local councils has over 500km of shared paths. For example, I can ride the entire 22km trip from home to work and not have to ride on one road.Sure I have to cross a few, but I'm not riding on them. Luckily, it seems that more and more councils are...
  18. Diamondback

    Aussie 200 Watt Limit Thread

    I've been running a "500" watt hub motor on my trike for a few years. Never even had a second glance. Helps that it's hidden in the small rear wheel with panniers on either side. Add to that I'm not a dick where and how I ride, and I don't have any concern at all. In reality, that little hub...
  19. Diamondback

    Aussie 200 Watt Limit Thread

    i have always thought that speed limits (not power limits) were the way to go. i would think 25kmh while on a shared path, and 40kmh elsewhere. then things become very simple for enforcement, and allows sensible power to be used in our bikes. 35kg limit wouldn't do for me. my trike weighs more...
  20. Diamondback

    Cycle Analyst V3 preview and first beta release

    maybe try reducing the throttle up ramp rate ? Jason
  21. Diamondback

    Aussie 200 Watt Limit Thread

    i once had an Airzound. its an air horn that is pumped up to 80psi by bike pump, and it's super loud. 110DB i think from memory. im planning to add another to my trike soon. Jason.
  22. Diamondback

    System (U, Motor, Controller) Efficiency

    my CA calculates these numbers for me...
  23. Diamondback

    "Zephyr" - Finally, the "v4" Fechter/Goodrum/Hecker BMS...

    hi George. i can't help as far as interfacing the zephyr to the DC-DC converter, but as yours (and mine for that matter) is still wired to the batteries the same way as it was originally, even with the DC-DC tripped off by those two wires, there will always be a very small draw from the...
  24. Diamondback

    Active pre-charge/inrush control

    that circuit sounds a lot like kfong's intelligent smart switch described here..... http://www.endless-sphere.com/forums/viewtopic.php?f=31&t=32135 it has the anti spark, and LVC, and it also features a timer to shut down power in the even that the rider forgets to turn off or unplug. i have...
  25. Diamondback

    Cycle Analyst V3 preview and first beta release

    speed errors are regular on my CA V3. it's caused by contact bounce in the reed switch. i routinely see max speeds of over 600kph :) i think your idea that it has to be sustained for some time before being logged as a valid speed would help eliminate the error. Jason
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