Hi all,
My battery charging knowledge is limited, but I know a bit about SMPSU
design.
I was wondering what topologies and silicon could be used to deliver
substantial powers used to charge a 300Ah 24V lead acid battery bank
(employing three stage charge curve like :-
https://www.electroparts.com.au/images/bc_chart_large.jpg).
My battery charging knowledge is limited, but I know a bit about SMPSU
design.
I was wondering what topologies and silicon could be used to deliver
substantial powers used to charge a 300Ah 24V lead acid battery bank
(employing three stage charge curve like :-
https://www.electroparts.com.au/images/bc_chart_large.jpg).
I have thought:-
1) Front end boost circuit, to give unity PFC and constant voltage
over wide input voltage range
1) Front end boost circuit, to give unity PFC and constant voltage
over wide input voltage range
1.1) But have read that due to high peak currents can be unusable at
powers above 150w (onsemmi switch mode PSU reference manual SMPSRM/D
rev 3B July 2002 page 9)
1.2) Should I parallel up boost circuit or go to duel-phase for higher
powers (not just components entire circuit)
1.3) What effect would the input frequency swing have on the boost
circuit?
powers (not just components entire circuit)
1.3) What effect would the input frequency swing have on the boost
circuit?
2) Probably a full isolated bridge with synchronous rectification.
3) what effect does the three stage charge cycle have on output
voltage and current the PSU supplies (told you I don't know much about
battery charging)?
3) what effect does the three stage charge cycle have on output
voltage and current the PSU supplies (told you I don't know much about
battery charging)?
4) Are there any good guides for designing lead acid battery chargers
within this power range?
5) any application guides / circuits on the net for this type of
application?
within this power range?
5) any application guides / circuits on the net for this type of
application?
specification:
Input voltage: 90 - 260 VAC RMS
Input frequency: 40 - 100 Hz
Nominal output power: 600 W +/- 5%
Nominal output current: 25 A
Rated battery voltage: 24 VDC
Operating amb. temperature: -25ºC to +40ºC
Efficiency: >85%
Cooling: forced air and none forced air
Package:187mm x 116mm x 50mm
Input voltage: 90 - 260 VAC RMS
Input frequency: 40 - 100 Hz
Nominal output power: 600 W +/- 5%
Nominal output current: 25 A
Rated battery voltage: 24 VDC
Operating amb. temperature: -25ºC to +40ºC
Efficiency: >85%
Cooling: forced air and none forced air
Package:187mm x 116mm x 50mm