Good evening!!!
I'm having a problem with the JK BMS's i've got for my batteries. As I told in my intro, I own several VW iD3/iD4 batteries to power my whole house even for weeks (as long as I don't charge the cars, of course).
These 12S Li-Ion batteries I have are the best thing I can think of, with no balancing and after 6 months working, the ones I have monitored are showing ONLY 0,010V of maximum voltage delta between cells, with 0,007 being the most common values found.
The balancing connector for the batteries uses a flat cable internally, with one small SMD fuse for each of the 13 wires. The batteries are very very well built and enclosed, and I don't want to open them to improve that flat cabling, as the charging currents I need are really low, and if that flat cable is enough for the batteries inside a car, for my home application where my batteries work almost idle compared to the demand of a car it should be more than enough,
The problem is that the BMS, a JK one 17S, 60A dis/charge and 0,6A balance current (BD6A17S6P) is showing an error indicating that the resistance in the balance wiring is too high and the balancing function is not usable. I've got values ranging from 0,45ohms up to 0,58ohms. I'm sure it is because of the flat wiring and the integrated fuse, but I've seen videos where other guys have similar impedances in their balance wiring and have not this error.
I've tried to contact the manufacturer to no avail, so I beg to the community knowledge to see if any of you has had this problem or any similar and has been able to solve it, or has any idea on how to deal with ir or what to try.
One thing I've tried is to manually enter the value showed in yellow in the advanced configuration page of the BMS, and then it starts acting weird, starting to balance but after a few seconds it fails, disconnecting even the battery completely for a second and the reconnecting in an endless loop. When I've done that the voltage offset inside of the battery also worsens, instead of improving, so I'm just scratching my head on this...
Attached you can see screenshots of what I'm telling and a little video showing that bizarre behavior when I manually set the impedance values...
Hope it helps
Regards
Angel
P.S: I don' see how to add a video, so here are some screenshots until I find out
I'm having a problem with the JK BMS's i've got for my batteries. As I told in my intro, I own several VW iD3/iD4 batteries to power my whole house even for weeks (as long as I don't charge the cars, of course).
These 12S Li-Ion batteries I have are the best thing I can think of, with no balancing and after 6 months working, the ones I have monitored are showing ONLY 0,010V of maximum voltage delta between cells, with 0,007 being the most common values found.
The balancing connector for the batteries uses a flat cable internally, with one small SMD fuse for each of the 13 wires. The batteries are very very well built and enclosed, and I don't want to open them to improve that flat cabling, as the charging currents I need are really low, and if that flat cable is enough for the batteries inside a car, for my home application where my batteries work almost idle compared to the demand of a car it should be more than enough,
The problem is that the BMS, a JK one 17S, 60A dis/charge and 0,6A balance current (BD6A17S6P) is showing an error indicating that the resistance in the balance wiring is too high and the balancing function is not usable. I've got values ranging from 0,45ohms up to 0,58ohms. I'm sure it is because of the flat wiring and the integrated fuse, but I've seen videos where other guys have similar impedances in their balance wiring and have not this error.
I've tried to contact the manufacturer to no avail, so I beg to the community knowledge to see if any of you has had this problem or any similar and has been able to solve it, or has any idea on how to deal with ir or what to try.
One thing I've tried is to manually enter the value showed in yellow in the advanced configuration page of the BMS, and then it starts acting weird, starting to balance but after a few seconds it fails, disconnecting even the battery completely for a second and the reconnecting in an endless loop. When I've done that the voltage offset inside of the battery also worsens, instead of improving, so I'm just scratching my head on this...
Attached you can see screenshots of what I'm telling and a little video showing that bizarre behavior when I manually set the impedance values...
Hope it helps
Regards
Angel
P.S: I don' see how to add a video, so here are some screenshots until I find out