Using Protection?

[StarsAndBars]

Ok guys I got a question about batteries. What is the diff between protected and unprotected? I thought it was like a copyright thing but eer, I guess not.

It also seems that between the two, protected is preferred.

Can someone please tell me everything there is to know about the difference? Thanks. BTW My Puresmoker Icon shipped yesterday!

 

[Whistle_Pig]

Protected batteries have a little circuit in the enclosure to protect against overcharge, overcurrent, and overdischarge.

Read more at battery university

The unprotected cells are really intended to be used in packs, where the pack enclosure has the protection circuit. Panasonic, for example, will sell unprotected cells to pack manufacturers only. (No I can't find where I read that, but I did read it someplace -- it was on the internet, so it must be true! Not to say that you can't find a vendor who'll sell you Panasonic unprotected batts though.)

 

[four2109]

Here are a couple of other links well worth reading.

http://www.e-cigarette-forum.com/forum/battery-mods/19698-abcs-batteries.html

http://www.e-cigarette-forum.com/forum/modders-forum/18959-lithium-battery-failure-boom-im-okay.html

 

[cozzicon]

Are the batts used in Joye product protected?

And does protection only matter if you are ganging batteries together for a HV mod?

I know I know... I should know this. But LI batteries are outside my current scope of expertise.

 

[Whistle_Pig]

Are the batts used in Joye product protected?

And does protection only matter if you are ganging batteries together for a HV mod?

I know I know... I should know this. But LI batteries are outside my current scope of expertise.

I don't know about Joye products. Scottbee might, since he's disassembled some -- they do have internal circuitry.

Protection matters in single-cell applications.

You can always go reading at battery university

 

[StarsAndBars]

hey thanks Whistle Pig and 42109. Exactly what I wanted to know

 

[LACENAIRE35]

Protected batteries have a little circuit in the enclosure to protect against overcharge, overcurrent, and overdischarge.

The unprotected cells are really intended to be used in packs, where the pack enclosure has the protection circuit. Panasonic, for example, will sell unprotected cells to pack manufacturers only. (No I can't find where I read that, but I did read it someplace -- it was on the internet, so it must be true! Not to say that you can't find a vendor who'll sell you Panasonic unprotected batts though.)

+1 Good advise

 

[Drozd]

you've got protected and non protected Li-Ion...
And then you have safe chemistry batteries which do not have a protection circuit like LiFePo4, and LiMN..

In all better batteries there is something called a PTC...which protects the cell against Over pressure and over temperature....this can usually be visually seen on the battery as a metal strip running down the side of the cell and little vents in the button end...

Then you have the PCB on Li-Ions that handle overcurrent, undercurrent, and short circuit protection....that can be seen visually on a battery on the negative end (the wrapper usually looks like it crimps in a little before the bottom)... there is a chance that a PCB could be shorted out or damaged via charger or even static electricity thus making it an unprotected battery with no visual warning...

the batteries that have both are usually labeled as IC or fully protected...

the safe chemistry batteries don't need the PCB because they are more stable and can withstand a higher amount of heat...and they do not vent with flames..where Li-Ions do vent gas and then flames because they contain an oxydizer...though they do require you to be more mindful of them because you can over discharge them (discharge them so low that they're ruined (won't take a charge))...

while using protected batteries is more important in stacked cell applications some find they're also prefer them in single cell aplications because the PCB will just cause the battery to stop working all together when the batery voltage gets too low as opposed to pushing an unprotected too far and overdraining it...

Cozzicon... the joye batteries don't really use traditional PCB protection ....the eGo is known to have a cheap mosfet in it for example and if you short an atty it'll fry the mosfet and kill the battery.... but usually the stock batteries are really as such a low capacity that the protection really isn't critical..

Oh aditionally when chosing batteries in addition to protected versus unprotected...I find that also taking into consideration what battery, atty, and voltage you'll be running and evaluating whether or not you'll be overstressing the battery or not....

other than that it's a call for you to make.... I have my list of which batteries I like and use...bassed on making sure I don't overstress them, trade offs between how long they'll run between charges and overall longevity, and the application..