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  1. J

    Battery warmer

    I have a batterypack with 9 gen1 Nissan Leaf modules. It's winter now and temperature lays around -10⁰C. After what I have read it's not adviseable to charge the battery when it is so cold so I wonder if you know of something that is keeping the battery warm, or over 0⁰C, when charging? I want...
  2. J

    How to protect cells from corrosion [Solved)

    I used a Dremel to remove old copper and zincstrips from cells I'm going to use in a new pack and I've read that it could lead to corrosion. I wonder if there is a way to prevent corrosion but still be able to spot weld them?
  3. J

    PSU vs charger

    I wonder if there is any benefits from using a PSU, a MeanWell or similar compared to an "ordinary" charger like this one: 20S - 72V (84V) 12amp Lithium Battery Charger ? Two MeanWell, I'm building a 20S li-ion pack, costs about 400$ together, the one I linked to costs 150£. According to this...
  4. J

    Low voltage in one P group

    I have one P group that is between 0.130 and 0.2V lower than the other groups and I wonder if it could be a bad cell or is it just unbalanced? I also wonder how I can find one bad cell in a pack built with copper/nickel sandwich method? I know which group it is
  5. J

    Connect Kelly KLS controller to mobile phone through USB

    I wonder if anyone has succeeded to connect to a kelly controller with you phone and the USB-cable? I can not and I don't have a PC anymore And I think it is to expensive to buy a bluetooth dongle for 100$
  6. J

    Bike dies driving downhill

    When my motorcycle is fully charged it cuts out power when I fully release throttle going downhill. Problem disappears after a short while. I always go downhill when it is fully charged because I live on top of the hill :) I think the problem lies in the BMS settings because I have another BMS...
  7. J

    Connect two packs in series and one BMS

    I have to split my 14S18P battery pack in two due to limited space. It is two 7S18P and i wonder two things. First is how to connect the BMS? I don't think it has to be different from a 14S pack. B0 is Battery- which is connected after serial connection of the packs. B1 is first positive of...
  8. J

    Belt or chain two stage reduction

    What is best, chain or belt, for primary reduction if I choose to have a two stage reduction on my motorcycle. Pros and cons are much appreciated
  9. J

    What do I Loose when reducing from 14 to 12S

    Yes, what do I loose? Acceleration and range? Torque does depend on Amperage I think? I need to place my motor a little higher in the frame and then I don't have enough room for the battery pack. At the moment I have 7 Nissan Leaf gen 1 modules. If I turn them from standing position to lying and...
  10. J

    Is mkV/A really correct?

    I have a halleffect current sensor and I can set sensitivity depending on how many amps it is rated for. I am trying to understand how to use it with an Arduino Uno. I dont understand the abbreviation mkV. 1 mkV is 1V isn't it?
  11. J

    Balancing Nissan Leaf pack Xiaoxiang BMS

    My Xiaoxiang 6S-22S BMS does not balance my Nissan Leaf battery pack. It's a 14S pack, 4.2V per cell and 58.8V fully charged. My charger cuts out at (I think) at 57.9. My problem is that my motor does not turn and only occasionally I have continuity thru the BMS (yes, occasionally, it seems to...
  12. J

    Solved! Problem connecting Xiaoxiang BMS

    See last post for answer :D I have a Xiaoxiang 6S-22S 250A continous current BMS. I try to connect it but I don't have any luck. My problems are that the app shows one extra cell, I can not charge it to 4.2V/cell (it's modules from a Nissan Leaf gen 1) the charget stops at 3.8-3.9V/cell and...
  13. J

    Damaged cell

    I accidentally shorted a module yesterday. I still get 3.8V from the cell (7.7V from the module) and the pack gives me 54.5V as expected. SoC is approx 50%. Is it dangerous to use it like this
  14. J

    Solved! Controller phase bolts gets very hot

    I don't know what the bolts where you connect the three pairs of cables from the motor are called but they where very hot when I came back home after a trip today. So hot so I burnt my hand when I touched them. I checked the controller temperature with my PC software and it said 54 degrees...
  15. J

    Relation of BMS, controller and motor

    Which one decides. My battery pack is good for 240A cont and 540A peak, my controller 200A cont and 500A peak and my BMS 250A continous and 375 peak. I read a post that states "battery:phase ratio at 1:2.5 is good". Is it 250A (my BMS continous amps) that sets the limit?
  16. J

    Solved! Peak current Daly BMS

    I have big problems with something turning power off when my bike reaches approx 250A. I am starting to beleive that it is the BMS. It is a Daly 14S, 48V, 250A BMS and I cant find anything about peak current. Does anyone know?
  17. J

    Fully charged battery blinking red Batavus

    A friend of mine has got a problem whith her Batavus ebike. It is fully charged (five dots) when she starts riding but it then looks like it is almost empty, it starts to blink red. She arrives at her destination as expected. Next time she starts the bike it's showing green light (four dots) as...
  18. J

    My Husqvarna SM610-99

    I could't resist driving it yesterday (and today) even though it is not finished. I have to add lighting and number plate before I will try to get it street legal and as you can see I have covered the battery pack and controller (under and behind the seat) with plastic bags because I haven't...
  19. J

    Which + terminal on KLS 8080i

    On my KLS controller there is a 200A fuse across the + terminals. One red terminal markt B+ and one grey markt +. I am not sure which one I shall connect to the battery +. I think that if I connect to the wrong terminal I bypass the fuse. Is that correct and which one should I connect to?
  20. J

    Use ebike batteries as they are inproject

    Yes, my question is just that, whats the pros and cons using, lets say 4, egoing batterys in a garden tractor project? Why dissemble when everything are there like bms, charging port and so on? Does it matter if Ah is different as long as voltage is the same?
  21. J

    6, 7 or 8 leaf modules for 48V system

    I am converting a 1999 Husqvarna SM610 to electric and I have a Golden motor, BLDC 10kW, with 48V windings. I will feed it with modules from a 2011 Nissan Leaf and if I choose 6 modules there is no problems with space in the frame, 7 is a tight fit and 8 is almost impossible. There are strikter...
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