Hi all,
I’ll try to make this short. Received 4 200a cells on the island of St Martin 1 1/2 years ago. Could not get a BMS to use so I rode bare back until just recently. The cells were all equal all the way up to 13.4v, never charged higher than that as I was being careful without BMS. Never went below 12.8v.
So everything was running fine until I installed a Daly BMS. Now all hell has broke loose ?. When I started monitoring with Bluetooth everything looked good for a couple of weeks. One day I fired the engine up and stated charging with the alternator. Voltage started spiking up to 14.8v and back to 13.6v. I could hear the load coming and going on the engine. Checked Bluetooth and my #4 cell was up to 3.7 with a delta of .5 with the other cells. I’m on a boat and did not have equipment to top balance or anything. The Daly balance function didn’t seem to be doing much of anything. I noticed that my #1 cell was at the lowest voltage. So I switched them around. (Please note at this point my meter said all cells were equal). This switch worked wonders and everything was running smoothly with only a delta of around .03 to .05 while charging and .003 at rest.
Then it started again. $&)($&&!!
This time my batteries were down to 12.95 when I started charging. All cells were equal via meter. The spiking again was up to 14.8v. Blue tooth was showing my #4 was again spiking from 3.2 to 3.8 instantly for a delta of around .6. Same as before before I swapped 4 and 1.
I suspect the BMS. Has anybody else run into this problem?
I’ll try to make this short. Received 4 200a cells on the island of St Martin 1 1/2 years ago. Could not get a BMS to use so I rode bare back until just recently. The cells were all equal all the way up to 13.4v, never charged higher than that as I was being careful without BMS. Never went below 12.8v.
So everything was running fine until I installed a Daly BMS. Now all hell has broke loose ?. When I started monitoring with Bluetooth everything looked good for a couple of weeks. One day I fired the engine up and stated charging with the alternator. Voltage started spiking up to 14.8v and back to 13.6v. I could hear the load coming and going on the engine. Checked Bluetooth and my #4 cell was up to 3.7 with a delta of .5 with the other cells. I’m on a boat and did not have equipment to top balance or anything. The Daly balance function didn’t seem to be doing much of anything. I noticed that my #1 cell was at the lowest voltage. So I switched them around. (Please note at this point my meter said all cells were equal). This switch worked wonders and everything was running smoothly with only a delta of around .03 to .05 while charging and .003 at rest.
Then it started again. $&)($&&!!
This time my batteries were down to 12.95 when I started charging. All cells were equal via meter. The spiking again was up to 14.8v. Blue tooth was showing my #4 was again spiking from 3.2 to 3.8 instantly for a delta of around .6. Same as before before I swapped 4 and 1.
I suspect the BMS. Has anybody else run into this problem?