Search found 16 matches

by DaTree
Oct 28 2019 7:05pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: 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
by DaTree
Oct 28 2019 6:56pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: 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 charges j...
by DaTree
Oct 27 2019 5:07pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: 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
by DaTree
Oct 27 2019 2:35pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: DIY battery BMS issues

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 higher. then when i unplug the charger ...
by DaTree
Oct 27 2019 2:33pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: DIY battery BMS issues

Of you are looking for handholding guidance here, you need to get a lot more precise with describing what's going on. Have you got a known good DMM / volt meter? Ammeter, ideally clamp type? At exactly which measurement point are you getting the reading? Exactly what hardware do you have? Why ask w...
by DaTree
Oct 26 2019 11:16am
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: 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 higher. t...
by DaTree
Oct 26 2019 11:05am
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: 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. they o...
by DaTree
Oct 25 2019 4:28pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: 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 over a...
by DaTree
Oct 25 2019 3:54pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: DIY battery BMS issues

also what are those spacers your using?
by DaTree
Oct 25 2019 3:53pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: 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.
by DaTree
Oct 25 2019 3:37pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: 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 fourht...
by DaTree
Oct 25 2019 11:51am
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

Re: DIY battery BMS issues

The charge connector or the main power connector?
by DaTree
Oct 24 2019 4:35pm
Forum: E-Bike Technical
Topic: DIY battery BMS issues
Replies: 24
Views: 1364

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 do ...
by DaTree
Oct 18 2019 11:22am
Forum: General Discussion
Topic: Diy build. Questions questions, so many questions
Replies: 8
Views: 770

Re: 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?
by DaTree
Oct 17 2019 9:37pm
Forum: General Discussion
Topic: Diy build. Questions questions, so many questions
Replies: 8
Views: 770

Re: 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.
by DaTree
Oct 16 2019 7:47pm
Forum: General Discussion
Topic: Diy build. Questions questions, so many questions
Replies: 8
Views: 770

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 batterypa...