u/Chance-Brilliant-720

4S1P issue

4S1P issue

Hello Community,

I can’t get it if the BMS is not working properly, or if I have done something wrong, or if it is normal (I doubt it).
Cells are mounted from right to left but I have wired everything accordingly.

Measured are:

B1- / B1+ = 3.9V
B1- / B2+ = 7.7V
B1- / B3+ = 11.6V
B1- / B+ = 15.4V
P- / P+ = 3.8V How’s that, shouldn’t it be 15.4V?

u/Chance-Brilliant-720 — 2 days ago

How to clean without causing corrosion

I cleaned the back metal case of a small monitor in order to stick a cardboard at its back, with some isopropyl alcohol (99.8) and a cotton swab.

Unfortunately I went a little too close of the PCB and it started to gnaw it. Hopefully the screen is still working. Yet, how close is it to stop functioning and above all, how to make sure there is no alcohol left that could do more damage in time?

Copper seems visible now. And I feel it would be a bad idea to rinse with water. Thanks.

u/Chance-Brilliant-720 — 8 days ago