Charging a Car Battery with a Bench Power Supply
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Posted by D from BC on July 11, 2008, 7:42 pm
Please log in for more thread options CC modes. If I set the power supply to say 14V, then short out the leads and set the current limit to _______ then connect the wires to the battery, would that be ok? I mean it won't harm the supply if it can handle the power. I was thinking of putting an inline diode and power resistor (lightbulb?) if the power supply is at risk. I dunno what charging current to use.. If possible, I want the battery fully charged overnight. Perhaps I just use whatever max current that results from placing a 14V source across the car battery. How do I tell when the battery is charged? Check for gassing? Or stop charging when the current falls off to a certain amount? D from BC British Columbia Canada | ||||||||||||||||||||||
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Posted by MooseFET on July 11, 2008, 8:02 pm
Please log in for more thread options Never ever ever hook it up backwards. Set the current to the AH rating of the battery divided by 10. A 1AH battery gets 0.1A charging. Make your 14V 13.8V. > I mean it won't harm the supply if it can handle the power.
> I was thinking of putting an inline diode and power resistor > (lightbulb?) if the power supply is at risk. > > I dunno what charging current to use.. If possible, I want the battery > fully charged overnight. > Perhaps I just use whatever max current that results from placing a > 14V source across the car battery. > How do I tell when the battery is charged? Check for gassing? > Or stop charging when the current falls off to a certain amount? > > D from BC > British Columbia > Canada | ||||||||||||||||||||||
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Posted by will on July 11, 2008, 8:16 pm
Please log in for more thread options > I plan on charging a car battery with a bench power supply with CV and
> CC modes. > > If I set the power supply to say 14V, then short out the leads and set > the current limit to _______ then connect the wires to the battery, > would that be ok? > I mean it won't harm the supply if it can handle the power. > I was thinking of putting an inline diode and power resistor > (lightbulb?) if the power supply is at risk. > > I dunno what charging current to use.. If possible, I want the battery > fully charged overnight. > Perhaps I just use whatever max current that results from placing a > 14V source across the car battery. > How do I tell when the battery is charged? Check for gassing? > Or stop charging when the current falls off to a certain amount? > > D from BC > British Columbia > Canada | ||||||||||||||||||||||
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Posted by will on July 11, 2008, 8:20 pm
Please log in for more thread options > I plan on charging a car battery with a bench power supply with CV and
POWER WILL NEVER TURN OFF
> CC modes. > > If I set the power supply to say 14V, then short out the leads and set > the current limit to _______ then connect the wires to the battery, > would that be ok? > I mean it won't harm the supply if it can handle the power. > I was thinking of putting an inline diode and power resistor > (lightbulb?) if the power supply is at risk. > CURRENT IS LIMITED BY THE TRANSFORMER RATING. BENCH SUPPLY ISAFTEN 1-3 AMPS. ALL CURRENT AFTER FULL CHARGE WILL PRODUCE HEAT. I WOULD SAY 5-10 HRS WILL BE OK. WILL > I dunno what charging current to use.. If possible, I want the battery
> fully charged overnight. > Perhaps I just use whatever max current that results from placing a > 14V source across the car battery. > How do I tell when the battery is charged? Check for gassing? > Or stop charging when the current falls off to a certain amount? > > D from BC > British Columbia > Canada | ||||||||||||||||||||||
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Posted by D from BC on July 11, 2008, 8:39 pm
Please log in for more thread options On Fri, 11 Jul 2008 17:20:41 -0700 (PDT), will
>> I plan on charging a car battery with a bench power supply with CV and
POWER WILL NEVER TURN OFF
>> CC modes. >> >> If I set the power supply to say 14V, then short out the leads and set >> the current limit to _______ then connect the wires to the battery, >> would that be ok? >> I mean it won't harm the supply if it can handle the power. >> I was thinking of putting an inline diode and power resistor >> (lightbulb?) if the power supply is at risk. >> CURRENT IS LIMITED BY THE TRANSFORMER RATING. BENCH SUPPLY ISAFTEN 1-3 AMPS. > ALL CURRENT AFTER FULL CHARGE WILL PRODUCE HEAT.
> I WOULD SAY 5-10 HRS WILL BE OK. >WILL >> I dunno what charging current to use.. If possible, I want the battery
>> fully charged overnight. >> Perhaps I just use whatever max current that results from placing a >> 14V source across the car battery. >> How do I tell when the battery is charged? Check for gassing? >> Or stop charging when the current falls off to a certain amount? >> >> D from BC >> British Columbia >> Canada Perhaps I can monitor the car battery temperature to know if it's fully charged. D from BC British Columbia Canada | ||||||||||||||||||||||
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> CC modes.
>
> If I set the power supply to say 14V, then short out the leads and set
> the current limit to _______ then connect the wires to the battery,
> would that be ok?