The battery builders club

How-Tos & Esk8 mechanics
, , , ,
5073

PMd :slight_smile:

1 Like
5074

Originally developed for audio for cleaner signals

2 Likes
5075

Excellent write up:
https://www.ebikes.ca/learn/connectors.html

5076

True. And since 2003 adopted by ebikes. Quality ones are rated for 15A.

1 Like
5077

what’s wrong with you lol

4 Likes
5078

I have an issue, not sure if battery and bms related?
On the bench I can pull full throttle no problem, as soon as I get on the board and pull more then 15 amp…board dies, and my vx2 is stuck on a screen like this

20200408_173435
20200408_1734352268×4032 2.17 MB

I have to turn my board off and then turn it on
And it comes on again but then as soon as I get on it the same thing happens
I brought it home with the switch in on position, this switch is the switch on my D595 or whatever it’s called. This bms
20200217_141836
20200217_1418363024×4032 3.36 MB

Those two white wires go to my switch and that is how I turn the board on and off
15863933162355170045453764673019
158639331623551700454537646730192268×4032 2.31 MB

15863933610706164087571250093722
158639336107061640875712500937222268×4032 2.33 MB

That’s the back of it, and those wires connect to the two white wires on my bms. I’m still able to switch the board on and off, but my issue persists…what do you guys think this could be? Should I try to bypass the switch and see if it keeps happening?

1 Like
5079

I also noticed this when I turned my board on and off my vescs one of them has a purple blinking light and the other doesnt…

20200408_174329
20200408_1743292268×4032 3.58 MB
is this also an issue?

1 Like
5080

Check faults on VESC tool. DRV in particular

2 Likes
5081

kk will do rn

5082

Just says no fault registered since start up

5083

discharge bypass BMS?

1 Like
5084

No its wired for discharge

5085

yeah, I bet the BMS is screwing with you

1 Like
5086

Hot garbage, I guess it’s time to rewire this pup…actually throw it away, going to wait for my smart bmss to get here

1 Like
5087

no, save it. you may need it. Besides, if you can probably use it for charging just fine, since the charging current is much, much lower. Edit: not sure the smart bms will be better, I’m struggling here with one.

1 Like
5088

I saw that post, not sure what you could do, what happened to the bluetooth? Mine started up right away!

5089

You tried putting a charger on the BMS?

5090

I did. Verified 50.4v between Batt+ and BMS C-.
The cells were a bit out of balance so I spend the day manually bringing them back within .02v. going to try charging again now

Edit: looks like its working now @BluPenguin @Bobby

1 Like
5091

When you give up, I have D140 charge only coming :joy:

1 Like
5092

Is this still that eBay BMS you got that you needed help with the wiring diagram?

I’ve ran two of them with zero issues so far.