Brandon8792
New Member
- Joined
- Nov 20, 2019
- Messages
- 57
Hello! I have a unique situation that I don’t think has been posted about.
Let me start out by saying I accidentally shorted the pack out when screwing a terminal down, and a bms lead was under it… burnt the lead in two because my ass ran because I knew chaos was potentially about to happen, but in the end just burnt the bms wire in two, no biggie.
So my pack will read 53v at the main terminals…
Cell 2, 3, and 4 will all read their voltages out (having issues with cell two reading out the voltage to the bms and active balancer leads).
All other cells read out correctly as well, which makes sense since the main terminals read 53v.
When I read the outputs on the pins for bms and active balancer, cell 1 reads 3.3, cell 2 doesn’t read, cell 3 turns to -3.3 cell 4 -6.6 and so on.
What’s weird to me is the polarity is changing, when all the cells are hooked up correct, no reverse polarity happening. So one, I can’t figure out why cell 2 reads correctly on the terminals and the threaded screws, and even the bus bars, but will not read on the bms leads or active balancer leads
But two I can’t figure out why the polarity is changing but not causing issues anywhere else except on the bms and active balancer leads.
All bus bars, terminals, and terminal ends have been sanded, alcohol wiped down, and then rewiped down. Super clean connections, not to tight but definitely tight enough, much more it would strip. 20-25 in lbs.
Also swapped out the bms leads and connectors, and active balancer connectors and leads with new ones, just in case maybe that was causing the issue… still nothing.
I learned there was an issue about this when I hooked up my active balancer and it fried it, I was like bullshit there’s no way… well guess what, there is, because something is off and for the life of me I cannot figure it out.
Please god someone help me figure out wtf is going on here… no cells swelled or anything, everything is normal!!!
I have two other packs hooked up same way, no issues, and on 3rd pack bout to be done same way… I know I’m doing it right but something is just weird on this one.
Let me start out by saying I accidentally shorted the pack out when screwing a terminal down, and a bms lead was under it… burnt the lead in two because my ass ran because I knew chaos was potentially about to happen, but in the end just burnt the bms wire in two, no biggie.
So my pack will read 53v at the main terminals…
Cell 2, 3, and 4 will all read their voltages out (having issues with cell two reading out the voltage to the bms and active balancer leads).
All other cells read out correctly as well, which makes sense since the main terminals read 53v.
When I read the outputs on the pins for bms and active balancer, cell 1 reads 3.3, cell 2 doesn’t read, cell 3 turns to -3.3 cell 4 -6.6 and so on.
What’s weird to me is the polarity is changing, when all the cells are hooked up correct, no reverse polarity happening. So one, I can’t figure out why cell 2 reads correctly on the terminals and the threaded screws, and even the bus bars, but will not read on the bms leads or active balancer leads
But two I can’t figure out why the polarity is changing but not causing issues anywhere else except on the bms and active balancer leads.
All bus bars, terminals, and terminal ends have been sanded, alcohol wiped down, and then rewiped down. Super clean connections, not to tight but definitely tight enough, much more it would strip. 20-25 in lbs.
Also swapped out the bms leads and connectors, and active balancer connectors and leads with new ones, just in case maybe that was causing the issue… still nothing.
I learned there was an issue about this when I hooked up my active balancer and it fried it, I was like bullshit there’s no way… well guess what, there is, because something is off and for the life of me I cannot figure it out.
Please god someone help me figure out wtf is going on here… no cells swelled or anything, everything is normal!!!
I have two other packs hooked up same way, no issues, and on 3rd pack bout to be done same way… I know I’m doing it right but something is just weird on this one.