Is there a short in this topology?There's one: cell1+ is connected to cell1- (right where charge.neg is connected too).
battery_configuration {
cc_cv.charge.pos->+cell.0-|+cell.1-+cell.2-+cell.3->bms.neg.upstream
|->cc_cv.charge.neg
}
I'll check.I have the BMS so we need to decide which opto coupler to order.
Here is a primer.Since the BMS over voltage protection can be set to any value, I can set it to trip at 3.35V and see what it does. I have a lot of cells and a lot of volts to charge so I can do a lot of test runs.
I don't know anything about opto couplers or relays so my search probably won't help much. But I'll see what I can find.
Perl:DF11-EP2428PCFA make 16s pack with bms battery.pos<->|->normally_closed_relay->power_supply_s.pos |<-48_volt_charger.pos bms<--------->|<-normally_closed_relay<-power_supply_s.neg |->48_volt_charger.neg disable bms balancing set hi cell cutoff to 3.5 volts set high pack cutoff as high as it will go so the hi cell cutoff trips first charge the pack with 48 volt charger until one cell trips the hi cell cutoff disconnect 48 volt charger set hi cell cutoff to 3.65 volts wait until the hi cell settles to the bms resume threshold foreach cell in cells connect power_supply charge leads to cell charge cell with power_supply bms triggers power_supply disconnect disconnect power_supply charge leads from cell wait until the high cell settles to the bms resume threshold next
Lets call that the 48 volt charger.Since I am are using the 0A-12A 0V-60V power supply, I will connect the relay to the on/off switch. Or at least see if I can figure it out.
Agreed. ThanksLets call that the 48 volt charger.
And you don't need to use a relay with it.
Your charge current goes through the bms fets for that one.
For the 3.3 volt psu you need the relay for charge termination.
Agreed?