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  1. D

    DIY battery BMS issues

    another question, how can i tell wether my charger is actually pushing 4a to this thing? i just put an amp meter on the negative side of my charge connector and only got a reading of 0.01ac whatever that means
  2. D

    DIY battery BMS issues

    ITS WORKING! its working!!! yay im getting the correct voltage reading now! i put the charge leads directly onto the battery. let it charge up a lil bit and now the bms is putting all the volts out to my connector. i am soooo happy i dont have to change anything else. atm im watching as it...
  3. D

    DIY battery BMS issues

    i have another small question. i have a 14s bms, can i use that one and just disregard the 14th balancing wire? also what are some good bms's for 13s systems. if anybodies got any good sources. i just bought some more batteries so imma needem
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    DIY battery BMS issues

    thank you i will try this
  5. D

    DIY battery BMS issues

    whats a dmm? i have a volt meter and a amp meter (though i dont know how to use it) my power connector reads 16v. my charger is a chino special yzpower-42 https://www.ebay.com/itm/283494884759 yea im just not sure what im doing and was hoping to get some guidance from people who might have...
  6. D

    DIY battery BMS issues

    what chargers do you guys use? ive got this thing hooked up to my charger. says its a 54.6v 4a charger. and when i do hook it up i can test the main power lead, which now actually tests at the correct voltage while the battery charger is plugged in. its sittin at 53.8 volts and wont go any...
  7. D

    DIY battery BMS issues

    when when i got those weird readding i was messuring from the negative side of the charge connect coming off the bms. but when i test off the black balance lead, and check each white lead after that i get good voltages. the problem comes when i test the charge and power connectors themselves...
  8. D

    DIY battery BMS issues

    i have a bluetooth chip that i havent yet installed. i did what you said and all my cell groups are showing correct volatges. im thinking maybe the under voltage thingy is triggered, that might be why its not working. do i need a pc interface to program this thing? or can i just do everything...
  9. D

    DIY battery BMS issues

    also what are those spacers your using?
  10. D

    DIY battery BMS issues

    ive just swapped the connection points on the bms. from the p- to the second spot on the c-. im still getting the same readings. do i need to charge it? all of my connections look solid.
  11. D

    DIY battery BMS issues

    ive check all my cell groups voltages they're all 3.7 - 3.9, im affraid to start charging this thing if ive miss wired it. also when i do what you suggested. negative side of the main power connector and testing each white balance lead. i get 0v for the first three groups then i get 1v on the...
  12. D

    DIY battery BMS issues

    The charge connector or the main power connector?
  13. D

    DIY battery BMS issues

    uhh, i think its all wired correctly but obviously its not because my power connector only reads 16 volts, also the charge connecter reads the same 16v. its wierd because when i first get the reading it can be as high as 36v then i watch as it degrades down to 16v. i dont know if maybe i need to...
  14. D

    Diy build. Questions questions, so many questions

    Ive tested all the cells im using. its 4p12s right now but i can change that back to 13s easy. Only thing im really worried about now it that red switch plug wire that ive circled. would that be connected directly to the possitive lead on the battery along with the other red wire for power?
  15. D

    Diy build. Questions questions, so many questions

    so from what you guys are telling me i need to connect that red switch plug line from the controller to the positive lead on my battery. then somehow connect the hall sensor up. and i shouldnt need to do anything with the extra white line coming from the motor.
  16. D

    Diy build. Questions questions, so many questions

    I have a few questions. if i have a 48v controller, can i use a 54.6v battery? what are the bare minimum components required for an ebike? motor, controller, battery, accelerator, and bike? are there any ways to test controllers? basically ive been trying to build an ebike from used laptop...
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