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kevinloh
Apprentice
Brunei
121 Posts |
 Posted - Nov 12 2003 : 7:22:53 PM
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You mentioned a filter cpapacitor. What does the filter capacitor does? And the transformer is mounted on plastic I'm worried that it would melt if it is connected to a car battery.
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Nov 13 2003 : 10:34:54 AM
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Filter capacitor just smooths the pulsing DC from the bridge rectifier into continuous DC.
As for the heat issue, you will have to be the judge.
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Auterium
Member
42 Posts |
Posted - Nov 13 2003 : 5:37:18 PM
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One thing that u should get to know is that every car battery(no matter if it is lead acid or gel) is that htey charge from 2 to 6 amp/hr.
Only if the manufacturer of the battery says so, then the charging amperage should be different. As for what i know only the liquid carbon batteries can be charged over 6 amp/hr. Actually thet charge at 35 amp/hr.
Maybe the charger might be getting too hot because, as the battery can't take much more than certain amperage, the rest of it is transformed to heat.
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Nov 14 2003 : 09:15:51 AM
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You know, a battery can be charged at any current as long as you can control the temperature. It's not recommended, but done all the time...I can charge the 20AH pack on my scooter in under an hour, but at that point, the batteries are uncomfortably hot so I have to let them cool befure I can use it. Electric drag racers use "dump packs" to recharge 50 or 100AH 300V packs in about 10 minutes.
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kevinloh
Apprentice
Brunei
121 Posts |
Posted - Jan 19 2004 : 12:39:20 AM
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I saw a 80A charger it cost US$279.00. Do you think it could charge a 40Ah car battery in less than an hour or will the battery boils like crazy?
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Jan 21 2004 : 09:33:52 AM
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It will charge the battery very quickly, but at the cost of cycle life. Of course, you shouldn't be cycling a car battery anyway, so it probably doesn't matter...
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Kale
Nobel Prize Winner
Canada
795 Posts |
Posted - Jan 25 2004 : 12:54:15 AM
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There are chips that do a fast charge up to ~%80 of maximum and then slow to trickle for the remaining ~20% claiming that this is better for the battery. Is this true?
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How long does it takes to charge...
