Jon_And_Kate
New Member
- Joined
- Sep 2, 2022
- Messages
- 4
I had made a plexiglass (acrylic) cover for a 16s 280AH EVE battery bank. All in a line, about 46" long. It makes sense for the space, but it means the wire lengths are barely able to reach the far terminals, and the BMS needs to sit about in the middle, just above the cells.
I bent the plexiglass sides so that it's resting on top of the cells, containing everything, and I set the BMS on top of that for initial startup, not grounded. It was working fine, showing all 16 voltages with no issues for a day in the overkill app, and in the remote LCD interface. Then yesterday, while it was still not grounded and working fine, I bored a hole into the acrylic cover a bit wider so that the positive lead can stick through the cover easier, about 2 feet away from the BMS on the positive side of the battery bank. Then not long after, the BMS started beeping, showing cells 13 and 14 at 0mV and 5000mV respectively for a second, then they would swap for the next second, and repeat.
I unplugged the harnesses from the BMS to power down, hooked up a grounding wire to the BMS. Then measured cells 13 and 14 at the cells and on the harness with no issues. I started it up again, and it showed voltages correctly again. Then about 5 minutes later, the same issue came back with cells 13 and 14 flipping back and forth, this time with the unit grounded. I haven't grounded the negative pole of the battery yet, but the BMS is grounded. I suppose I'll try that next.
Has anyone else had this issue? Can it be fixed, or did I fry it?
I bent the plexiglass sides so that it's resting on top of the cells, containing everything, and I set the BMS on top of that for initial startup, not grounded. It was working fine, showing all 16 voltages with no issues for a day in the overkill app, and in the remote LCD interface. Then yesterday, while it was still not grounded and working fine, I bored a hole into the acrylic cover a bit wider so that the positive lead can stick through the cover easier, about 2 feet away from the BMS on the positive side of the battery bank. Then not long after, the BMS started beeping, showing cells 13 and 14 at 0mV and 5000mV respectively for a second, then they would swap for the next second, and repeat.
I unplugged the harnesses from the BMS to power down, hooked up a grounding wire to the BMS. Then measured cells 13 and 14 at the cells and on the harness with no issues. I started it up again, and it showed voltages correctly again. Then about 5 minutes later, the same issue came back with cells 13 and 14 flipping back and forth, this time with the unit grounded. I haven't grounded the negative pole of the battery yet, but the BMS is grounded. I suppose I'll try that next.
Has anyone else had this issue? Can it be fixed, or did I fry it?