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palachzzz

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About palachzzz

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  1. palachzzz

    Ninebot One Z : Z6-Z8-Z10

    Absolutely the same, Z10: https://ecodrift.ru/2018/09/10/razbiraem-z10-vzveshivaem-raznye-dvigateli/ Z6: https://ecodrift.ru/2018/08/10/ninebot-z6-razbiraem-izmeryaem-i-vzveshivaem/
  2. palachzzz

    WheelLog Android App

    About 3-5W when stop, so it's <0.01A for 84V battery, so it isn't noticeably. By the way we can't use Voltage for extremely accurate calculation, because different EUC's wheel boards may lie up to 1-2V. You need to use the lowest current curve, not 1A, not 0.7A. 0.2A is more then we need, but we haven't curves for lower currents (but difference between 0.2A and 0.05A won't be signifficant). Also you trying to calculate capcacity to 2.8V, no EUCs which can accept you to discharge to such voltage, 3.0V it is absolute zero for 18L. We use wheels, not batteries itself, so we need to know remaining charge of wheel, not some theoretical capacity of cells (3500mAh), you can't use more then ~3000-3100 mAh in EUCs from MJ1.
  3. palachzzz

    WheelLog Android App

    Oh.. Guys, KS official APP lies more than others (Gotwat, Inmo, Ninebot..).. You need to understand physics of discharge graphs, before making any decisions.. Take a look to MJ1 graph: How do you think, why the discharge curves are different for different currents? Because of internal battery resistan—Āe! When you connect 10A load, battery dissipate some voltage by itself (Ohm's law), this value = internal_resistance*current, and you can see difference about 0.45V-0.5V between 10A and 0.2A, so the internal resistance is about 40-50 mOhm. How do you think, what voltage cell will have if you turn off the load after some time? It will return to zero-current voltage curve: see 15A discharge curve at 1.5 Ah (discharge was stopped because of overheat). Therefore, if you want to know battery condition using voltage measure (everyone does this, except Ninebot), you should measure the voltage at a near-zero current and use about zero-current discharge curve (at least 0.2A in our case), or make a correction taking into account the immediate current and the internal resistance of the battery (such thing does Inmo controller, except V10/F) And you can see steep falling after 3.45V for MJ1 cells, so KS formula which is linear from 4.125V to 3.0V cell voltage (18L, and to 3.125 for 67V wheels) shows some kind of non-relevant bullshit, but not battery charge. For example, it shows 27% at 68V, it is 3.4V per cell, can you find 27% of battery capacity after 3.4V on this graph? By the way, there are no WheelLog version for 84V KingSong which show the same numbers that KS APP for such EUCs (only 18L for now)
  4. palachzzz

    WheelLog Android App

    Kind of... For 67V version: battery = ((voltage - 52.90)/13)*100 if (voltage > 65.8) battery = 100 if (voltage < 52.9) battery = 0 Or if we talking about voltage per cell (all versions): battery = ((cell_voltage - 3.30625)/0.8125)*100 if (cell_voltage > 4.1125) battery = 100 if (cell_voltage < 3.30625) battery = 0 The problems are: - Full charge actually is 4.2V per cell, not 4.11V, that's why you can ride for free (in percent meaning) on full charge (100% won't decrease) - Discharge curve of most of Li-ion cells at <3.40V becomes nonlinear with a steep falling, that's why at 12% the battery becomes almost empty, any acceleration produce significant voltage sag, and you can't ride normally. In the other hand: - Gotway controllers very inaccurate in voltage measuring, +-1V for 67V version (with linear magnification for 84v and 100v versions), that's why some riders note that their EUC doesn't charging to 100% with new formulas.
  5. palachzzz

    WheelLog Android App

    Marty, the latest version you should like is 2.0.13, not 2.0.9. The calculation formulas there are exactly the same as in Gotway application. The problem is that these formulas aren't accurate. But let me rephrase your "my real-world 2-year experience" into "my 2-year habbits", and in this case everything in your words becomes correct and moreover, now I understand that I agree with you. In version 2.0.14 I tried to transfer in percentages what would be more correct to attribute to the "remaining mileage" as separate metric. Now when I look at the percentages and see the numbers, I do not quite understand how much I can still drive, and how much I still have? for example, I know that I can ride about 8 km after 20% with old formulas, is it real 20% when my total one charge mileage is 70 km? not, it isn't accurate at all, but I knew what it means, because I had it all time before. But now I little bit scared to see 12% at this point, but it is real-world true. This applies not only to Gotway, but in general to all the wheels (except KS-18L)
  6. palachzzz

    My Z10 Triumphs, Tribulations, and Failures

    It is slightly difficult to describe it with my poor english, but I will try: When you are braking, FETs short one of motor winding for a short period of time, the motor winding turns into a coil of step-up DC-DC convertor, which accumulates braking energy, after that FETs disconnect coil from itself and connect*** to a battery, and accumulated coil energy flows to a battery. Coil short needed to increase generated voltage, otherwise it won't charge a battery. It's basic principle of regeneration in electric transport. ***actually FET don't connect it to a battery, it is done by back Diodes built-in into FETs, but such description will help to understand proccess.
  7. palachzzz

    WheelLog Android App

    Read this and one page further:
  8. palachzzz

    My Z10 Triumphs, Tribulations, and Failures

    Just connect all the motor wires together, and try again.
  9. palachzzz

    My Z10 Triumphs, Tribulations, and Failures

    Possible options: 1.Diodes (from charger to each battery) 2 The lowest battery charging first, until voltage becames equal, then charging both batteries
  10. palachzzz

    My Z10 Triumphs, Tribulations, and Failures

    It isn't true for Z. There are one two-channel BMS, but two separate batteries, two power- wire harness, and two set of FETs (for each battery), they are not connected between themselves. So batteries may be connected only when two pair of FETs are opened simultaneously for feeding the motor, but also it may be possible that board don't open two pairs of FETs (from batteries) simultaneously. I don't know how it can be checked. @Marty Backe, ninebot Z protocol very different from others. In other wheel battery percent calculates from voltage in App. But Z transmitted also battery percent by himself. It transmitts percent for each battery and separate general battery percent for both batteries, I don't know how it calculated, but I use "general battery percent" for WheelLog, because WL has only one battery meter. I suggest to supervise regeneration in Ninebot app in "Battery menu", there are voltage, battery percent, and also remaining capacity in mAh.
  11. palachzzz

    Ninebot One Z : Z6-Z8-Z10

    Z - tire designed especially for Z, it is CST with "Ninebot" mark
  12. palachzzz

    Ninebot One Z : Z6-Z8-Z10

    We haven't reviews from them. It may be "short" for Z. And he isn't owner of Z
  13. palachzzz

    Ninebot One Z : Z6-Z8-Z10

    If someone will read it, you need to know, that we have some tricky naming of Z10. We call it ZlO, it is translated from russian as "Evil"
  14. palachzzz

    Ninebot One Z : Z6-Z8-Z10

    Guys, there are no Z-owners in Russia for now, because first batch will arrived on next week, the second batch will arrived on October. The reviews described above are short attempts by experienced riders riding on Z6 which our dealer provided for testing.
  15. palachzzz

    Ninebot One Z : Z6-Z8-Z10

    400 pcs Z8 were produced and are no longer planned, info from our dealer (from manufacturer)
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