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  1. R

    4 years, and 3000+ miles later...

    Nice to read this Rafe from calibike
  2. R

    Kepler Bottom Bracket Friction Drive For Sale (Finally)

    Hi Kepler Did u ever get pas running with vesc I was thinking pas could go where the skateboard throttle goes Rafe
  3. R

    Xiongda YTW-06 mini hub motor

    whats the net weight motor batt and all
  4. R

    YOUTUBE RECOMMENDS :

    did a good 11 mile commute on my 30lb 30 mph 30 mi range road ebike, https://www.youtube.com/watch?v=QS0JenyUf-M&t=180s QS0JenyUf-M
  5. R

    Ebikes faster than cars in local transit

    I use my ebike on metro and metrolink as range extenders. I find ebike is faster same start point same end point. Log ride on strava eride than compare w google maps for car. Driving is for drones as far as la is concerned...
  6. R

    GPS tracker

    i got one of these rear flasher with a tracker built in. http://www.aliexpress.com/item/Spybike-gps-tracker-it-s-built-in-the-bike-rear-lamp-with-motion-sensor-support-anti/1697020412.html I put a pay one last all year sim and put $20 in it. http://www.lycamobile.us/en/ After 2 weeks act was...
  7. R

    Calibike batt stats with CAv2.3

    I did a formal test of my ebike 40c3 with calibike 48v15a battery https://endless-sphere.com/forums/viewtopic.php?f=3&t=73270 and the video q1vkqMkvTqU
  8. R

    System (U, Motor, Controller) Efficiency

    I did a formal test of my ebike 40c3 with calibike 48v15a battery https://endless-sphere.com/forums/viewtopic.php?f=3&t=73270 and the video q1vkqMkvTqU
  9. R

    CAV3-DPS not recognizing Calibike Battery

    hi sloan the battery will show a voltage even when switched due to high capacity caps inside BMS. But if you put a load with switch off this voltage will go to zero. This is normal behavior. rafe
  10. R

    CAv3 Powering off Low Voltage Cuttoff

    Dunum Our calibike battery packs have electronic balancing circuit not a resistor based one as in older designs. You cannot see any resistors on bms because there aren't any. Just like your intel motherboard. its all integrated inside the bms chip set. rafe
  11. R

    Calibike 48V 15ah battery

    the cells are screened for 2200 mah capacity They are rated for 3C but our BMs only uses them at 2C. The BMS chips are a family with different chipset/ pinouts for 13Sx7P pack 2200 mah * 7 in parallel = 15.4 Ah 4.2v * 13 in series = 54.6V Thus a fully charged calibike 48v15 will show up as 54V...
  12. R

    Calibike 48V 15ah battery

    hi Here is what i was able to dig up on the bms chip set I went thru the BMS chip level schematic. The chip used as master controller in the BMS has a balancing network and does not need external resistors. I tracked down the chip specs which are in Chinese along with a Chinese app note. I...
  13. R

    Calibike 48V 15ah battery

    As i said previously the BMS uses fet based balancing network does not need resistors. The balancing network is in the BMS controller chip. As far as the 18650 I use generic Chinese batteries that are screened for 2200 ma output. I hope that helps Rafe
  14. R

    Calibike batt stats with CAv2.3

    dear DnMun, I am sorry I dont't think you know what you are talking about re balancing network. I went thru the BMS chip level schematic. The chip used as master controller in the BMS has a balancing network and does not need external resistors. I tracked down the chip specs which are in...
  15. R

    Calibike batt stats with CAv2.3

    got my ultra 72v15. (got a pair) monster power
  16. R

    Calibike batt stats with CAv2.3

    One of the issues i am seeing with calibike bms is that BMS is designed to put out 30a max continuously. But some people's controller motor combination are pulling 35 to 40 causing premature bms failure or weakening a slice. I am now recommending that every one limit their controller to 30a and...
  17. R

    Calibike batt stats with CAv2.3

    re cell balancing older style bms uses balancing resistors on bms while newer BMS is moving to switched capacitor cell balancing. bms cell balancing 2 methods (resistive and capacitive see schematic how does one upload a pic?) "The switched capacitor balancing system can be operated...
  18. R

    Calibike batt stats with CAv2.3

    the cali pack will go down to 37v. most people have lvc shutoff in controller that stops at 41v. please lover the lvc on your controller to get 15ah rafe
  19. R

    Calibike batt stats with CAv2.3

    Im sorry I dont mean to be rude but I think proof beyond I dont see something is required. If it did2 have balancing bms battery would get only the top slice would go to 0. Meaning battery would stop at 47v.
  20. R

    Calibike batt stats with CAv2.3

    I m electrical engineer and I would be interested in seeing your test to decide the bms lacks balancing network. Visual does not cut it. If the bms wasnt there the top slice would go to 0 while the rest of pack was fine
  21. R

    Calibike batt stats with CAv2.3

    Hi this is rafe The bms does have a balancing network. I have tried it down to 40v and I tested its output. There are various bms and some look different. Rafe
  22. R

    Thank you everyone

    this is rafe from calibike. I now have plenty of stock of the 48v15 batteries www.calibike.com
  23. R

    MOSFET gate PCB design question

    i am advocating no pcb to bus bar but rather screw on to metal bar like used on auto battery terminals used to extract 500a for 30 seconds or 50 to 100 a continuously..
  24. R

    MOSFET gate PCB design question

    one more thing use differential opamp to measure voltage drop across 2" of power line metal and use that to sense current use or use hall sensor. Do not use in series resistor hall effect current sensor...
  25. R

    MOSFET gate PCB design question

    how about some more ideas. 1. make the mosfets modular. so others can make mini pcb with new mosfets as they come out 2. send power in and out on common metal rails mounted below pcb. 3. input dc pwr and output motor connectors cables directly screwed on metal rails 4. modular mosfets pcbs...
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