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OneLeg

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About OneLeg

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    Hong Kong
  • EUC
    V5F,MCM5

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  1. Sorry for the late reply... Here is my progress, getting batteries has been a big problem due to the wuhan virus and only got them 2 weeks ago. I have cycled them all through an Opus charger. I think my photos speak 1000 words. https://pixhost.to/gallery/dnNUX I sourced both original BMS boards and bout 64 x Sanyo 20700b 4250mha (20A discharge) To begin with the made a pack 4S8P, brick shaped battery. At least it helps demonstrate that the battery fits in the top compartment. After we got things sorted we are building the side battery, 32 cells. It shows that you can't put 20700 batteries in an 84V as you can't put 2 extra batteries. I want to test performance and pedal stability with one pack then I will install the top one. But first we the electronics workshop must finish! so slow.
  2. yes but only if you have a 67V/900W you can use 16 x 21700 on pack on the side panel for sure. I think the top compartment woudl also handle 21700's...
  3. Here guys. https://pixhost.to/show/335/142427911_topbattery-32cell-20700x2.jpg https://pixhost.to/show/335/142427912_sidebattery-32cell-20700x.jpg I sourced both original BMS boards and bout 64 x Sanyo 20700b 4250mha (20A discharge) To begin with the made a pack 4S8P, brick shaped battery. At least it helps demonstrate that the battery fits in the top compartment. After we got things sorted we are building the side battery, 32 cells. It shows that you can't put 20700 batteries in an 84V as you can't put 2 extra batteries. I want to test performance and pedal stability with one pack..
  4. It seems that the top location can't take the 20700 if inserted the same way as we have to do 4 x 20mm + 2 BMS.... that is close to 83mm... and the space is only 76mm tall... So the batteries battery pack must go in sideways... I still have to measure how much does it stick out by...
  5. Oh that is how they can configure 800Whr.... that is an interesting option but you would be using 10A batteries..... maybe my 48 x 20700B option is better though only 734Whr/20A
  6. Thank you. 1. BTW make sure your generic BMS does not have mosfets, original Gotway does not have any 2 . Where did you plug the BMS cable from the new pack on to the motherboard? I have taken photos of my MCM's battery slots and the motherboard. https://www.dropbox.com/sh/uymym2tko903xlu/AAAtoDGWv5CBdZgrJklz4vFpa?dl=0 3. I think the top location if you remove all the pad the has enough space for the Sanyo 20700B's. This means that there is space at the top location be able to configure it with 16S2P and 16S1P on the side location. In my calcualtions that would give 734Whr. In some places the rate the 20700B as 20A. 4. Do you know what the mostfet model/part number. Seems the mosfets are not visible and are under the board.
  7. Thank you. Today I have opened my MCM5 900W too and are looking at battery options. Have you put a BMS on that pack that you have made. I have just ordered both of the BMS's for each style. Of battery pack. The only issue I have is I don't know where I connect the second BMS. https://www.dropbox.com/sh/uymym2tko903xlu/AAAtoDGWv5CBdZgrJklz4vFpa?dl=0
  8. mrelwood, I kind of feel is totally futile to respond to you. I see you don't listen, you think you are right, you make many assumptions, about everything including my riding skills etc... I don't think your knowledge is complete see little point responding as I don't think you are interested in discussions, you just want to show everyone you are right... when maybe you are not totally right. I would be grateful if you could just add me to your ignore list please as it seems I can't block you. Thank you.
  9. Exactly, you need very loooooong feed, you have two choices either you have shit acceleration or shit breaking... take your pick... Also I don't understand why the breaking system needs limiting, they should make it aggressive and fast to breaking. I slam by V5 so hard so times it has failed at maintaining the balance. Also being able to turn fast means I can do a 90 degree turn and break kiind of like if I was skying. KS16X is weird, don't like it pedals changing pitch etc makes it very unstable as I am a rider that leans at slow and high speeds. I scrape the pedals on the ground on inmotion's regularly.
  10. It is all software but some unicycles accelerate slower than others to make them safer. Those 2000W motors could pull a lot of amps if they were not restricted. so they have a software based accelerator curve. If they didn't and they engaged the 2000W, you would not stay on, it would throw you off.... 2.15 = less friction, means that can turn easier, will respond better. All those 2.5" feel sluggish and hard to turn. If you ride in urban areas where you may meet lots of pedestrians you need manouverability... Least effort turnning, slowest speeds, the most leaning at slow speeds, the best return to vertical, and the most acceleration... V10F is attrocious at braking. I find it scary, when I hit it hard then it just won't stop, when where i need to to stop... I don't understand why they don't let breaking be direct instead of smoothened.
  11. The V10F, is software limited as engaging the motor like your ninebot did would probably throw you off. Unfortunately I find it i very irresponsive compared the V5F or the NInebot 14" wheels. If I was given one, I would replace the tired for 2.15" wide tire to enjoy a bit of nimbleness.... also pump that tire, also change the settings to maximum on pedal sensitivity.... Kind of feel there is a hole in the market, for a unicycle that is nimbler and has the range.... MCM5's pedals are too low, though the L column can be replaced. It is nice to ride. We need night and simple unicycles with long range.....
  12. We recently opened a 1500W unit and only saw the 2 packs totally 60 cells... mind you we didn't open the other side.... but all the cabling didn't show any signes of a 3rd battery pack... On the 1500W there is no room to put 20700 or 21700 cells... I think the max is 3.5A x 3.6V x 20S3P = 756Whr.... IF they used 21700 it would be lighter and could be setup with 5A 3.6 x 60 = 1080Whr... but they don't. It would also would lose weight.
  13. Thanks for your concern, I am concerned too, so they are being manufacture by a electronics pro, that works reparsing everything and anything day in day out for the past 20 years. The packs will be inspected with a FLIR infrared camera. Manufacturing,, testing, inspection, burn it, safety runs safety measures have been figured out.
  14. I want to know if anyone sees any problems with what I am trying to do. My MCM5 is a 130Whr version (2200mha 16S) on the side panel battery pack. I want to replace the batteries with Sany 20700B 4250mah/20A batteries. (732Whr in theory if I replace all 60 cells) The reason for this is for the battery to be able to discharge quicker. I weight about 87kg and find a big difference in the responsiveness of the 20A battery packs. I understand that physically the side panel the batteries it may not fit, however I see @Traveller else has already done it. On the LHY16S version 2 board (the big flat one), I don't see anything limiting the AMPs like other generic BMS do. For the top battery pack I've yet not figured out how I am going to put 20700 batteries into it and whether it feasible. I have to take the MCM5 apart. As I don't have an existing battery pack to savage I don't have the BMS board. I think it is the LHY16S version 1 board. If anyone can tell me where I can source our or anyone has a dead battery pack I take one from it would be great. How will the mosfet handle going from a theoretical 600A discharge to a 960A discharge rate? Do I have to replace those?
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