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| Electronic Projects Design/Ideas/Reviews Are you building an electronic project or want to? Maybe you need some assistance? Come and submit your electronic questions here and let our experienced members find a solution. |
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24th March 2008, 06:18 PM
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600W battery charger design
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 :- http://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 1.1) 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? 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)? 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? 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 |
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24th March 2008, 07:42 PM
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I couldn't access your picture, please attach it.
To float charge the battery, the output voltage needs to be 27.6V. Just make sure the SMPs is current limited.
__________________
I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez |
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24th March 2008, 07:56 PM
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sorry about the jpg. The charging cycle chart can be seen on this page:
http://www.electroparts.com.au/page.php?x=3&i=2&o=4 |
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26th March 2008, 02:24 AM
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if you don't want to build one i would use this batteyr charger
http://www.meanwell.com/search/pb-1000/default.htm |
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26th March 2008, 11:33 AM
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Thanks for the link carmusic, but i do want to design one.
Any ideas? |
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