Can a Computer Power Supply Used as Car Battery Charger

[erick_214]

Hi guys,

May nakapag-try na ba sa inyo na gamitin yung computer power supply na pang-charge ng car baatery?

Paano ba gawin ito?

TIA

[yebo]

no it will not work because the minimum voltage needed to charge a lead-acid battery is 13.2 volts and the computer power supply puts out only 12 volts.

[lowslowbenz]

sorry double post .. me bad

[lowslowbenz]

For what purpose?

Trickle charging?

Check out this link: http://autospeed.com.au/cms/title_Ze...4/article.html

Naka gawa na ako nyan, and I'm using it sa bahay.

DIY lang, zero to minimal cost!

[erick_214]

For what purpose?

Trickle charging?

Check out this link: Browser Warning

Naka gawa na ako nyan, and I'm using it sa bahay.

DIY lang, zero to minimal cost!

Hi Sir,

Thanks for your reply. Hindi lang sana pang trickle, kung baga pang-charge na rin kung sakaling ma-drain. At balak ko rin sana gamitin habang nagpapatugtog ako ng sounds gamit yung set-up ng kotse.

So posible ba?

Tsaka kung sakaling gagawa ako sa house ng sub woofer at may 1000watts apms ako paired with a 15" 2000w na sub eh pwede pa kaya yung power supply ng PC..?

TIA

[Bin Diesel]

mababa ata amperahe ng power supply di kakayanin load.

[Type 100]

mababa ata amperahe ng power supply di kakayanin load.

Not all power supplies are created equal. If you go with an established brand of power supply (Corsair, Antec, FSP, Thermaltake, etc) and shop wattage ratings accordingly, you can see stuff with as much as 60A on one output rail. Quality power supply units can be pricey though.

If you plan on using a PC power supply unit as a charger, you'll need to read the labels to make sure you get the wattage or amperage you need. Otherwise I think it should be feasible.

[dr. d]

if you can manage to up the output voltage to at least 13.2 volts, then you can use it to charge your battery.. a little longer time (o sige, a lot longer time) than what the usual car battery chargers need, but it'll do the job.

[erick_214]

Ah, ok so basta't ma-modify yung PSU to have an output of 13.2V+ would be good. Tingin ko naman ay magagawan ng paraan ito.

What about using the PSU as the power source of my ampli? Kakayanin kaya? Napansin ko kasi maninipis yung wires ng PSU kumpara sa wire na ginagamit papuntang battery ng car eh. Ano sa tingin nyo guys?

[dr. d]

Ah, ok so basta't ma-modify yung PSU to have an output of 13.2V+ would be good. Tingin ko naman ay magagawan ng paraan ito.

What about using the PSU as the power source of my ampli? Kakayanin kaya? Napansin ko kasi maninipis yung wires ng PSU kumpara sa wire na ginagamit papuntang battery ng car eh. Ano sa tingin nyo guys?

in charging the battery, the important aspect is that the power supply should be able to push a higher voltage than the battery can push out. if not, you can not charge the battery, no matter how much current (amps) your source can dish out. the amperage is not a factor of yes charge or no charge. . it is a factor of how long it will take to charge the battery. let's say that a charger that dishes out 5 amps fully charges the battery in, say 8 hours.. if your PSU can only dish out 1 amp, than it'll take 40 hours to charge that battery. the only penalty would be time.
now, in powering your amplifier, let us say your amplifier demands x amps. if your power supply can not dish out continuously at least x amps, then it'll burn out fast. and do not equate electrical input watts with amplifier output sound watts.. they're different..
btw, those wires you mentioned.. they are a rough indication of just how much power your gadget will handle or will require, to function..

[yapoy86]

what you need is a SWITCHING POWER SUPPLY... those being used in CCTV system.. its regulated 12V up to 30 amps.. you can also combine 2 power supply to make it 60 amps..

you can buy that at around 2,500 petot each.. they can drive your amps without draining the battery plus its regulated so you will not hear noise

[erick_214]

what you need is a SWITCHING POWER SUPPLY... those being used in CCTV system.. its regulated 12V up to 30 amps.. you can also combine 2 power supply to make it 60 amps..

you can buy that at around 2,500 petot each.. they can drive your amps without draining the battery plus its regulated so you will not hear noise

Hi SiR,

Thanks for the infos, about this switching power supply, pwede ko ba iwanan overnight na naka-charge yung battery ng kotse w/o overcharging the car batt? Sa battery ng motorcycle pwede rin bang iwanan overnight or kailangan kong orasan?

Thanks

[Chinoi]

Hindi problem ang charging current sa car battery unless low charge na ito. Ang problem ay dapat increase yun dc output into 14.5V same as alternator charging voltage. Dapat dagdagan ang winding +12v secondary winding. Pero mahirap magsiksik ng extra winding sa ferrite transformer. Hindi mo naman pwede tangalin yun +5V winding dahil kailangan ito ng referance for overvoltage control ng pwm ic.

[CVT]

Sige subukan mo bro.,- at balitaan mo kami rito...

17.2K:type:

[miso_honi]

just purchase a battery charger and forget about your question. you don't buy a shoe brush to use as a toothbrush, vice versa

[yebo]

malay mo naman shoe brush ang toothbrush nya

kahit trickle charger di pwede ang comp power supply, sinabi na nga na 12 volts lang ang output nyan e, too low to push any charge to a lead acid battery. kung pwepwede yan e di sana nauna na ako gumawa nyan, sa tanda kong ito ba. ka-mura ng battery charger eh, may trickle charge function pa at siguradong hindi ma-overcharge ang battery mo.