Battery not charging!

[Trent4670]

I have a Samsung 37.5v lithium battery in my golf cart. Daly BMS 10s 36v 200A.

Constantly getting the fault alarms: ‘Sun volt high level 1’ and ‘cell volt high level 1’ and SOC not charging at all.

Current protection parameters:

Cell volt high 4.25v
Cell volt low 2.70
Sum volt high pro 42.5
Sun volt low pro 27.00
Chg overcurrent 300.0A

Any suggestions on what could be going wrong?

 

[Jordi]

Does this happen after or while you use the battery?
Could the battery be full and that is why it does not charge?

cell volt high level 1; one of the cells has a too high voltage?
Can you please provide screenshots of the Daly app to see all the cell voltages and SOC?

 

[Trent4670]

Seems to happen when I put it on charge. I put the charger in all last night when it was SOC 37% and did go up

 

[Jordi]

There is something wrong here; li-ion cells are full at 4,2V per cell; so SOC should be 100%. LiFePo4 cells full charge voltage is 3,65V per cell while charging, so you are far beyond that already and also should have reached SOC 100%. Any way to calibrate the BMS with your battery? Maybe the BMS is programmed for 12/24/48V and since you are putting a battery that is 10S; 42V... you get odd results.

Did you buy this BMS for the battery you are using or are you reusing it from another similar battery?