lonewolf754
New Member
- Joined
- Feb 12, 2020
- Messages
- 30
I have two of these BYD modules and I'm trying to get them to a charge of 3.5v per cell. One of the modules will reach 3.325v per cell with 17-24mv difference in their voltages. The other module will only get to 3.240v per cell with a difference of 7-10mv.
I check the cell voltages and the total voltage of the module every 10 minutes during charging. The voltages will rise quickly at first and will gradually slow to a stop.
The cell voltages on both modules arrived at my home at 2.7-2.9v.
Here is the ending results from my last charge attempt on my worst module. It's beginning voltage was 24.0v. I checked every 10 minutes.
25.83
25.89
25.93
25.95
25.97
25.97
25.97 -The amperage output on the Korad began slowly rising here, that's why I stopped.
The other module behaves in the same manner. The voltage stops rising.
I stop charging because I'm afraid something "bad" will happen, as I charge these in my home. If both modules stopped progressing at about the same voltages I'd probably think this is normal and I just need to keep charging.
Here is what I use to charge these BYD modules as I haven't finished with my solar panel installation.
1. Korad 30v 5a variable power supply.
2. DROK numerical control regulator DC 8-60v to 10v-120v 15A Boost Converter.
* I set the DROK to 4A CC output and the charging voltage of 28v which is 3.5v per cell.
* I set the Korad to .10v below the actual voltage of the module and it charges in CV mode. I raise
the voltage .10v whenever the module's voltage rises by the same .10v.
I monitor the module using a BattGo BG-8S.
No BMS yet. Plan to get a couple if these modules are found to be good.
*Is it normal for these BYD modules to stop rising in voltage?
*Any suggestions?
*What am I doing wrong?
Any help and suggestions is appreciated. I am new at this.
I check the cell voltages and the total voltage of the module every 10 minutes during charging. The voltages will rise quickly at first and will gradually slow to a stop.
The cell voltages on both modules arrived at my home at 2.7-2.9v.
Here is the ending results from my last charge attempt on my worst module. It's beginning voltage was 24.0v. I checked every 10 minutes.
25.83
25.89
25.93
25.95
25.97
25.97
25.97 -The amperage output on the Korad began slowly rising here, that's why I stopped.
The other module behaves in the same manner. The voltage stops rising.
I stop charging because I'm afraid something "bad" will happen, as I charge these in my home. If both modules stopped progressing at about the same voltages I'd probably think this is normal and I just need to keep charging.
Here is what I use to charge these BYD modules as I haven't finished with my solar panel installation.
1. Korad 30v 5a variable power supply.
2. DROK numerical control regulator DC 8-60v to 10v-120v 15A Boost Converter.
* I set the DROK to 4A CC output and the charging voltage of 28v which is 3.5v per cell.
* I set the Korad to .10v below the actual voltage of the module and it charges in CV mode. I raise
the voltage .10v whenever the module's voltage rises by the same .10v.
I monitor the module using a BattGo BG-8S.
No BMS yet. Plan to get a couple if these modules are found to be good.
*Is it normal for these BYD modules to stop rising in voltage?
*Any suggestions?
*What am I doing wrong?
Any help and suggestions is appreciated. I am new at this.