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About WI_Hedgehog

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  • Location
    Milwaukee, Wisconsin, U.S.A.
  • EUC
    miniPro, KS-14SMD; EUC World Supporter

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  1. Do you mean the cost of a Smart BMS? I thought Gotway, and most other EUC manufacturers, don't monitor cells during discharge, only charge. If that's the case @Cody makes a good point. Aren't schottkey diodes $0.28 each out of China, less in bulk?
  2. From @Carbonos post: Monster V3 3108Wh compared to my friends on their Monster V3 84v 2400Wh. Mi riding weight is 100 kg. Last friday we went on a non stop 75km ride with lots of 40 kmh+ riding and my battery was down to 28%. From the EUC Comparison Table: Monster V3 84V: 2400Wh / 25Wh/mi = 96mi (154km) expected range Monster V3 100V: 1845Wh / 25Wh/mi = 74mi (119km) expected range (both match eWheels expected range) From @Carbonos post: 100kg = 220lbs = 15.75 stone 40kph = 25mph 75km = 47mi Expected range of his wheel: 3108Wh / 25Wh/mi = 124mi 3108Wh / 1
  3. Is the package rated at 1/16 watt? (What is the wattage?)
  4. What is the value (in ohms) of the balance resistors?
  5. Income tax started out as a 1% tax on the richest 1% of the population. Drivers licenses started out as a slip of paper you sent off for in the mail. EUC insurance will be 3x the cost of car insurance due to the risk, and health insurance providers won't cover EUC riders, like with sky-diving. Regulations will be endless, like anything burrocrats get control of, and insurance mandatory. Stay under the radar so you can afford to enjoy wheeling.
  6. I'm sure I'll wait until next year as you're doing. Much the same though, was thinking KS-18XL, MSX, or Monster? Now it's how nice the V11 should be, and by Spring all the bugs should be worked out.
  7. To stop the beeps when it cannot find the wheel, touch the chat bubble in the upper right so it is hollow instead of solid. To exit the program and have it not run in the background, press the BACK button twice, then wait 4 seconds. The first press will display a notification to press the button again to shut down the program. The second press displays the "Good bye!" message and close the resources it is using and exit.
  8. InMotion keeps making me want this wheel more and more. Every time I read the forum there's something more positive that InMotion has done, such as the 2nd charger when they already have a reasonable purchase price. In fact, it's pretty hard to not buy the V11.
  9. The resistor will try to dissipate charge current when cell voltage is above 4.20V. (Note how many cells are in Parallel doesn't matter unless there is more than one BMS, as one resistor R is used per cell group, regardless of the number of cells in the group. This is the problem with basing charger current on what the cells in parallel can handle instead of what the BMS can handle.) P = I x E Power is greatest at the Constant Currant -> Constant Voltage crossover point. If we take the charger to be 84V 2A (note 3A was used be the thread starter, but I'm using a more conservativ
  10. You may wish to read this series of posts on balancing, which appears to relate to your situation.
  11. HOW EUC FIRES ARE GOING TO BECOME MORE COMMON SUMMARY: To minimize the risk, use the Charging Best Practices. A new BMS thread popped up that relates to what we've been talking about with balance charging. The BMS got cooked. This post builds on how cells get out of balance, and state what happens next. This problem is compounded by using any/all of: recycled cells, charging to 80%, and fast-charging. To quickly recap, one of the dangers in using recycled cells is some cells will be near their End Of Life and start to go out of balance quickly, which is unexpect
  12. I think it's possibly more like top-tier sellers forcing battery exchanges, and I should have stated that more clearly. Gotway is probably not going to do more than they absolutely have to. If that is the case, it's potentially very short-sighted, and could cause a similar ban to the cheap-China-hoverboard ban where poor lithium battery management caused a fire in a plane's cargo hold leading to a complete ban on low-quality imports for a while. (I know someone who lost $150,000 because the ship was prohibited from unloading the hoverboard cargo. Of course, the Chinese were already paid,
  13. Well, there's the other shoe. I'm going to guess the reputable sellers got the Panasonic 21700 information from Gotway. Gotway possibly bought refurbished cells, and is now recalling them because, quite frankly, using used cells not designed for this task is generally a bad idea. China does a lot of "recycling," that's how all those plastic straws ended up in the ocean. Now we have the evidence they imported TESLA batteries in bulk and are ripping them apart for the cells. I can understand third party sellers using them, figuring "they seem good and are cheap, they'll last six months."
  14. So I learned something new, thank you @houseofjob !! Those sellers do indeed say Panasonic 21700 to this day! As far as I could find, Panasonic makes only one 21700 packaged cell, exclusively for TESLA. @Mike Sacristan seems to have gotten to the bottom of where the used cells are coming from. While there aren't any laser markings (my mistake), there are the three unique squiggles on the bottom of the cell as Mike mentions, though there is also the ultrasonic weld joint from the fuseable wire on the top: The seller adds various colored wrappers.
  15. I think you read my post incorrectly, as my position is since TESLA automotive cells are not available to anyone but TESLA, they are only used in-house, and TESLA doesn't have enough cells for their own use, the cells in Gotway wheels most likely aren't new TESLA cells. If TESLA/Panasonic was selling TESLA cells to third-parties, it would be big news. If for no other reason than real TESLA cells are very traceable, Gotway probably wouldn't buy stolen ("siphoned") cells to put in new EUCs. If Gotway was using TESLA cells, there should be evidence of it by now. Without any evidence at all,
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