This has probably been discussed before, but I could not find it with a search. How does the usb charger that comes with your manufactured e-cigarette charge the battery if you don't push the button. Is there some sort of electronic magic hocus pocus (i'm a plumber) that allows the charge to reach the battery with the switch open? Just curious why a mod couldn't be charged in the same way if you had some of that magic in it.
Charging 3.7 volt single cell thru atty connector
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This might help for a home made mod.
http://www.e-cigarette-forum.com/forum/battery-mods/221258-510-charge-port-3-7-v-boxmods.html
The commercial e-cig has a mosfet swtch to allow you to vape, and another mosfet to allow you to charge.
Sort of like filling a tank by opening the valve with your left hand, and draining it with your right hand. Same tank, same valve.
http://www.e-cigarette-forum.com/forum/battery-mods/221258-510-charge-port-3-7-v-boxmods.html
The commercial e-cig has a mosfet swtch to allow you to vape, and another mosfet to allow you to charge.
Sort of like filling a tank by opening the valve with your left hand, and draining it with your right hand. Same tank, same valve.
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Thanks for the reply and the link. Thought something like that might be the case but needed someone to confirm. I picked up a mosfet at RS just to play around with, but would need wheels on a mod that had two of them in it. Just amazing how they can fit all that into a 510 size battery along with an auto switch.
From my little bit of research each mosfet needs at least one draw down/up resistor also, correct? Any idea if someone has drawn a schematic with both mosfet's?
From my little bit of research each mosfet needs at least one draw down/up resistor also, correct? Any idea if someone has drawn a schematic with both mosfet's?
How about the circuit board in a 3.7 volt Riva?
Or the protection circuit board on a protected Li-ion battery?
They use 1 or 2 (depending on current capability dual mosfets.
Pic 1 Riva board
Pic 2 8 amp protection board with 4 mosfets (2 duals)
pic 3 The typical block diagram for a Li-ion protection controller chip
pic 4 and the circuit diagram
Not the typical RS components
Or the protection circuit board on a protected Li-ion battery?
They use 1 or 2 (depending on current capability dual mosfets.
Pic 1 Riva board
Pic 2 8 amp protection board with 4 mosfets (2 duals)
pic 3 The typical block diagram for a Li-ion protection controller chip
pic 4 and the circuit diagram
Not the typical RS components
Thanks again Rocket, from my limited time on ecf it seems you are always willing to help the electro-challanged and I am one that is very greatful. Armed with your info, I went ahead and bought a few ego-t electronic sets. They cost me less then I could buy all the parts and a heck of alot less time.
I had looked at your thread on putting an additional 510 connection in a mod for charging and considered doing so, but don't like the idea of it being a live connection. Not a problem for me but my wife would not be as careful and might even screw an atty into it. I have a few 4.8v nimh battery packs for radios that just sit into a desk charger. The charging contacts on this battery pack are NOT live and have some sort of voltage gate that allow the charge to reach the batteries. I took a bad pack apart and this gate is very small, there is a 2 pin part on the + side and one on the - side. The one on the + side apears to be a rectifier (GS 1A) but I am not sure about the - side, maybe thyristor (P 200)? Could this sort of set up be used on your 510 charging connections?
I had looked at your thread on putting an additional 510 connection in a mod for charging and considered doing so, but don't like the idea of it being a live connection. Not a problem for me but my wife would not be as careful and might even screw an atty into it. I have a few 4.8v nimh battery packs for radios that just sit into a desk charger. The charging contacts on this battery pack are NOT live and have some sort of voltage gate that allow the charge to reach the batteries. I took a bad pack apart and this gate is very small, there is a 2 pin part on the + side and one on the - side. The one on the + side apears to be a rectifier (GS 1A) but I am not sure about the - side, maybe thyristor (P 200)? Could this sort of set up be used on your 510 charging connections?
Joe
(plumber joke)
I try to keep things on the simple side.
The 510 charge port is "live" and wired with a much smaller ga wire and placed hopefully in an inconvenient place.
But it is not fool proof. A diode would drop voltage and most Li-ion cell/charger set ups will not compensate for the voltage loss. A Mosfet switch has a very low resistance when on. Turn it on at the right time and voltage loss is almost nil at charging currents.
Not sure what's in your nimh packs but since you have them, use them. No need to let them sit around.
They don't need the same level of protection that Li-ion cells do.
Even the mods I make with UN-protected Li-ion cells have a protection board in the circuit. They are about a buck from DX. I order about 10 at a time, and about a month later, SURPRISE, they arrive
Another, somewhat redneck approach is the Rubber Band charging adapter
(rubber band to hold the switch on and put in on charge through the atty connector),
Looks dumb, but works.
(plumber joke)
I try to keep things on the simple side.
The 510 charge port is "live" and wired with a much smaller ga wire and placed hopefully in an inconvenient place.
But it is not fool proof. A diode would drop voltage and most Li-ion cell/charger set ups will not compensate for the voltage loss. A Mosfet switch has a very low resistance when on. Turn it on at the right time and voltage loss is almost nil at charging currents.
Not sure what's in your nimh packs but since you have them, use them. No need to let them sit around.
They don't need the same level of protection that Li-ion cells do.
Even the mods I make with UN-protected Li-ion cells have a protection board in the circuit. They are about a buck from DX. I order about 10 at a time, and about a month later, SURPRISE, they arrive
Another, somewhat redneck approach is the Rubber Band charging adapter
(rubber band to hold the switch on and put in on charge through the atty connector),
Looks dumb, but works.
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just thought i would chime in with an idea...
using an eGo USB charger, would i be able to safely charge a AW Protected 16340 750mah battery
make a box big enough for the battery,
add a 510 threaded connector and wiring it to the + and - spring terminals to make contact to the battery.
then dropping my battery in it
would this work, reguardless of battery protection?
*purpose of this would be to charge a spare 16340 in my car, while out and about or cottaging.
using an eGo USB charger, would i be able to safely charge a AW Protected 16340 750mah battery
make a box big enough for the battery,
add a 510 threaded connector and wiring it to the + and - spring terminals to make contact to the battery.
then dropping my battery in it
would this work, reguardless of battery protection?
*purpose of this would be to charge a spare 16340 in my car, while out and about or cottaging.
I add a protection board to unprotected 18650 cells, and in the photo of the tube mod a few posts back, a 26650 LiMnNi cell and charge them with 420mah eGo chargers. The charger terminates correctly.
Using a cell with built in protection and a spring contact holder would be about the same thing.
Using a cell with built in protection and a spring contact holder would be about the same thing.
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