Lumaci
April 24, 2018, 4:23pm
1
Never wired a bms up before wired it up once and fried the BMS took a new one out of the box and tried again.
Before when i wired it up every second wire was negative = No power out of the wire.
Now theres a group of two wires getting the same amount of power, is that wired up right?
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b264
April 24, 2018, 4:26pm
2
No, it is not correct. Do not plug that into the BMS.
Take a closer photo of the top of your cells.
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b264
April 24, 2018, 4:55pm
4
I’m confused how the small black balance lead can be at 3.7V. You’re measuring them all relative to the big black battery negative wire, right?
dg798
April 24, 2018, 4:57pm
5
What cell battery is this? And is this for charge only or discharge as well
Lumaci
April 24, 2018, 4:58pm
6
Old Evolve Bamboo GT Battery pack some prismatic 18650 cells.
Lumaci
April 24, 2018, 4:59pm
7
measuring them all from the - and + side. i can show you how two sec.
Lumaci
April 24, 2018, 5:02pm
8
Did this on each point, the entire side where theres no balance wires is a negative side the entire side with the balance wires is a positive afaik
b264
April 24, 2018, 5:04pm
9
No, the entire side with no balance wires is why it’s not working for you but I can’t suggest how to fix it because the little black wire shouldn’t be at 3.7V and I don’t know why it’s measuring that way
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dg798
April 24, 2018, 5:05pm
10
The black wire should be ground and no voltage and the yellow and white wire that were the same should be different leaving the black as 0
b264
April 24, 2018, 5:05pm
11
@dg798 Don’t confuse him more. There are two black wires.
b264
April 24, 2018, 5:05pm
12
You’re measuring them all relative to the big black battery negative wire, right?
Lumaci
April 24, 2018, 5:05pm
13
When i did it so the black wire and other wires were ground the bms instant fried.
Its been plugged in now for like 4 min no smoke.
dg798
April 24, 2018, 5:06pm
14
Should’ve been a little more specific the black wire on the end of the connector
Lumaci
April 24, 2018, 5:06pm
15
Should i do that? If i do that the voltage is really weird.
Getting 16V on the second last wire.
dg798
April 24, 2018, 5:07pm
16
I think it would be helpful to take a video of how u are measuring each cell so it’s easier for us to see what’s going on
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b264
April 24, 2018, 5:07pm
17
Lumaci:
Should i do that?
Yes, you have to do it that way and it’s why it didn’t work the first time
Lumaci
April 24, 2018, 5:08pm
18
Already did hahaha, on its way.
1 Like
b264
April 24, 2018, 5:13pm
20
The problem is that when you check the voltages, you need to keep the black multimeter probe on the fat black battery minus wire and just move the red multimeter probe. Those wires on the other side are not all negative, those are series connections just like the ones on the opposite side
1 Like