You cannot get it to top balance because the BMS will over voltage way before you are able to get there.
After exhausting all other methods and spending weeks trying everything. If no one else can help, and if you can find it.
Use the Barracuda Bob Top Balance Method (BBTBM)
Warning: For advanced users! Use all possible safety equipment.
Make sure you update your battery firmware and have a good monitoring software running.
Charge the battery up to 54.6V normally and hold it for over an hour or when it quits taking current.
Turn the BMS off
Open the battery pack.
Put an active balancer on all the cells and set it for 3.420V to active balancer.
Put a low current power supply (1-4A) and set it for constant current of 1-3.5 Amps at 58.4V (16 Cell @ 3.650V/each) charge up slowly until you get all the cells to 3.650V and let it sit for as long as can.
After top balancing every cell for a couple of hours turn it off and let them settle down.
Turn battery on and monitor with software/Bluetooth.
Discharge it as low as it will go. I use a 3K inverter running appliance or even a charger and dump into my main battery pack. I don't like wasting the energy.
Charge it up at 25-50% C rate at the BMS 100% SOC Reset Voltage (EG4 LifePower4 V1 with latest software is 56.6V, ECO-WORTHY Rack Battery is 56.8V)
Check the status to see if it is properly balanced. Discharge the PAC to 3% or below and then recharge back up to 100% BMS reset voltage (E-W is 56.8V, LP4 V1 is 56.6V).
If your cells are in decent shape, you should be good to go. If after doing this procedure multiple times and still having issues permanently install active balancer inside battery pack.
After exhausting all other methods and spending weeks trying everything. If no one else can help, and if you can find it.
Use the Barracuda Bob Top Balance Method (BBTBM)
Warning: For advanced users! Use all possible safety equipment.
Make sure you update your battery firmware and have a good monitoring software running.
Charge the battery up to 54.6V normally and hold it for over an hour or when it quits taking current.
Turn the BMS off
Open the battery pack.
Put an active balancer on all the cells and set it for 3.420V to active balancer.
Put a low current power supply (1-4A) and set it for constant current of 1-3.5 Amps at 58.4V (16 Cell @ 3.650V/each) charge up slowly until you get all the cells to 3.650V and let it sit for as long as can.
After top balancing every cell for a couple of hours turn it off and let them settle down.
Turn battery on and monitor with software/Bluetooth.
Discharge it as low as it will go. I use a 3K inverter running appliance or even a charger and dump into my main battery pack. I don't like wasting the energy.
Charge it up at 25-50% C rate at the BMS 100% SOC Reset Voltage (EG4 LifePower4 V1 with latest software is 56.6V, ECO-WORTHY Rack Battery is 56.8V)
Check the status to see if it is properly balanced. Discharge the PAC to 3% or below and then recharge back up to 100% BMS reset voltage (E-W is 56.8V, LP4 V1 is 56.6V).
If your cells are in decent shape, you should be good to go. If after doing this procedure multiple times and still having issues permanently install active balancer inside battery pack.
