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  1. zogthegreat

    best value hub motor for mountain bike conversion

    Hi @Chalo, thanks for the reply. My daughter is 17 next month, (gaaa my little girl is getting big!), so I want to keep the speed to a reasonable number. When I was that age, I tended to be somewhat stupid about things like speed, and if I am honest, my common sense was also lacking then, which...
  2. zogthegreat

    best value hub motor for mountain bike conversion

    Hi @2old, thanks for the reply. I have been going through the ebikes.ca website. Lot's of information there. However, I have a mailbox across the border, so shopping in the US is also an option for me. BTW, in regard to your name, it's not the age that counts... it's the mileage! :lol...
  3. zogthegreat

    best value hub motor for mountain bike conversion

    Hi everyone! I'm looking at converting a mountain bike to an ebike hybrid for my daughter. I already have a 48v lifepo4 battery pack to power the bike. I assume that I will also need a controller for the motor, so recommendations for that would also be appreciated. My daughter weighs...
  4. zogthegreat

    Good batteries for rebuilding laptop battery pack

    Hi everyone! I've checked the wiki and perused the site, but it seems I'm trying to do the opposite of what everyone else does! :lol: I need to replace a battery for one of my laptops. Although I can get a new battery for it from China for about $20.00 USD, my past experiences with these...
  5. zogthegreat

    New build - Razor E300 "Blue Carbon"

    Hi armandd, I've been busy for the last few weeks, so no updates. But I haven't abandoned the project, I'm hoping to get some work done this month.
  6. zogthegreat

    New build - Razor E300 "Blue Carbon"

    OK, I got the swing arm pivot welded in today. The regulator on my welder is bad and I'm waiting on a replacement, so I'm using flux core wire and it sucks! I can't believe how fast I got used to gas! Big difference in the amount of splatter with the welds. I might ask around and see if...
  7. zogthegreat

    New build - Razor E300 "Blue Carbon"

    So I finished the pieces for the pivot today. I used a piece of foam board to get the shape I needed for the pivot connector. I rounded the corner and drilled a hole the size of the pivot bolt. Then I mounted it onto the pivot tube: I marked the foam board against the mount on the frame...
  8. zogthegreat

    New build - Razor E300 "Blue Carbon"

    I added the support for the pivot to the swing arm: Then I cut and welded the parts to mount the pivot tube to the swing arm: I needed the pivot to stick out so that the two frames won't hit each other when the scooter hit's a bump. I probably over-welded everything, but since this...
  9. zogthegreat

    looking for recommendations for BMS upgrade

    :( So in short, no. OK, so I'll rework my design. Thanks amberwolf!
  10. zogthegreat

    New build - Razor E300 "Blue Carbon"

    I was at the scrap yard the other day looking for metal when I found these triangles of 1/16" steel: Normally I prefer 1/8" or larger for a mount, but since I'm trying to keep the weight down, I decided to pay $2.00 and use them. I really love my local scrap yard. They have a literal hill of...
  11. zogthegreat

    New build - Razor E300 "Blue Carbon"

    Hi everyone! :) I've been asking questions on this forum for a while, and I thought I should contribute to the community that has been giving me so much assistance.I'm already posting this on another forum, but maybe some of the techniques that I'm using might help someone else, (and maybe...
  12. zogthegreat

    looking for recommendations for BMS upgrade

    A follow up question, if I may :? I'm looking at the design of my build and it would work better if I stacked the battery cells like this: I realize/understand that the board on the top: is there to facilitate the connections of the battery leads. I'm sure that I could fabricate a new...
  13. zogthegreat

    looking for recommendations for BMS upgrade

    Thanks! I guess I was using the wrong search phrases! :shock: :shock: Thanks for that bit of information! It's always the little details like that that end up nailing you! Fortunately, I kept all of the original packaging from when I disassembled the battery. I reused the yellow plastic...
  14. zogthegreat

    looking for recommendations for BMS upgrade

    Thanks amberwolf! BTW, do you know where I can get some shrink wrap for the pack? I'm using packing tape right now, not sure how good that is for the long term! ;)
  15. zogthegreat

    looking for recommendations for BMS upgrade

    I hooked up everything according to the schematic that I made and all of the light come on now. :D :D This just leaves "D-". On the original BMS, "D-" went to the key switch: It's hard to see on the picture, but the black lead from "D-" is spliced into the red wire going to the key...
  16. zogthegreat

    looking for recommendations for BMS upgrade

    OK, I drained the cells down to 3.6v ea and emailed sun-ebike. To further confuse the issue, I found the manufactures label on the battery case: It very clearly states that it's 48v 12ah. 48v 12ah 13S does make it a Li-Ion. Maybe the HPPN7070260 printed on the side was a manufacturing...
  17. zogthegreat

    looking for recommendations for BMS upgrade

    Man I really want to use profanity right now! What do you think is my best course of action now? I'm a noob when it comes to lithium batteries, I've been using SLA's up to now. The charger matches the charging port on the case. Here is the link to the battery on sun-ebike.com...
  18. zogthegreat

    looking for recommendations for BMS upgrade

    OK, I think I have this figured out: The positive from the charger goes to the battery positive, which loops back to B16 via the connector wires as per OEM's diagram. B16, B15, B14 and B13 connect to the battery positive. All of the other connections go to the battery in sequence. The...
  19. zogthegreat

    looking for recommendations for BMS upgrade

    To answer my own question, yeah, I did do a dumb arsed noob mistake. I went back and checked the pictures I took before and I noticed that there were neg wires on the BMS go to the battery: I'm going to drain the pack down to about 46v, hopefully I didn't screw anything up. Is there anyone...
  20. zogthegreat

    looking for recommendations for BMS upgrade

    I went back to the sellers eBay page and reread the instructions and I noticed this: I don't have anything connected to the part that says "C- charge or discharge negative" "D- only as discharge negative". Is this where I should be connecting the charger? The original BMS was connected...
  21. zogthegreat

    looking for recommendations for BMS upgrade

    So I drained the battery pack down to 50.5v and hooked it up to the charger. When it was finished charging, I remeasured and got the same results, cells 10, 11 and 12 showing 4.0v and all the rest showing 4.1v. The BMS is also still showing red lights on D4 through D15, with D1, D2, D3 and D16...
  22. zogthegreat

    looking for recommendations for BMS upgrade

    LOL, I only have 12v lights in my RV. I made a loop with a controller and a motor, then taped the throttle open about 15% to drain the battery. I'll take it down to about 50 - 51v and then try charging it again. I'm using the charger that came with the batteries, so I'm assuming that it's the...
  23. zogthegreat

    looking for recommendations for BMS upgrade

    OK, so I finished wiring up everything last night. I put it out on my BBQ and plugged it in, (paranoia can be healthy at time! :wink: ), and left it for the night. This morning the light on the charger was green and I started testing the packs and I got the following: The strange thing is...
  24. zogthegreat

    looking for recommendations for BMS upgrade

    The battery is rated at 500w max, with a "Standard current - <15a" and "Max current: <30A（100us". It's the same as this: https://www.ebay.com/itm/DuraB-48V-12Ah-Fish-Li-ion-Battery-for-Electric-Bicycles-Lithium-E-Bike-Fit-500W/152526481967?hash=item2383496a2f:g:EJQAAOSwJ4hY8kgS
  25. zogthegreat

    looking for recommendations for BMS upgrade

    How should I test? I measured complete pack voltage and I got 47.5v. I then measured terminal to terminal, walking down: and I got 3.6v on each. The math seems right, but when I hook the BMS back up, I still have a light out on #D16. (EDIT) Just to mention, #'s D1, D2 and D3 also don't light...
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