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Forum Index : Electronics : battery chargeing
| Author | Message | ||||
| Eddie Newbie  Joined: 16/10/2011 Location: United StatesPosts: 25 |
I've got it in my head that electrons flow from neg to pos,anyway thats what I learned back in the 60s when I was in the USAF.I also thought batteries were charged by forceing a current thru the battery from pos to neg,meaning you would put the neg terminal from the charger to the pos of the battery.but I keep reading its the other way around. Can someone tell me what I'm missing? |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Yeah thats right, electron flow is actually the other way, from negative to positive. I think, remembering from my school days, this fact was discovered long after we starting using circuits and batteries and had some standards in place, and it was too late to change. So even though, technically, electricity flows in the opposite direction, its better to totaly ignore that fact, it will only confuse you and for day to day electronics, we assume its the other way, from positive to negative. To charge a battery, you put a higher voltage source across its terminals, + to +, - to -. That makes current flow in the other direction, back into the battery, causing it to charge. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| Warpspeed Guru  Joined: 09/08/2007 Location: AustraliaPosts: 4406 |
Yeah, its sure confusing. Electrons are negative, and flow from negative to positive THROUGH THE LOAD. But within the battery they flow the opposite way, from positive to negative. So when you connect battery + to load +, and connect the two negatives, current flows around in a loop. When you connect up a charger, the charger becomes the source, and the battery the load. You still connect + to + but the current then flows the other way through the battery. Cheers, Tony. |
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| Eddie Newbie Joined: 16/10/2011 Location: United StatesPosts: 25 |
Thanks Tony. I finally get it! |
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