Chain Vaping & Battery Heat

[BreeZyCloudZ]

So, if anyone has seen my posts or builds, I tend to build low (below .15ohms). I use a mech-mod and I often chain vape. Now i know if your mod or batt gets hot out of nowhere, you have a problem. But what if everything is built correctly, your using lower gauge wire, everythings clean and everything is accumulating heat during the chain? Can you continue to vape or have to let it cool? Each pulse is safe, but are multiple in a row unsafe? And when I say HOT, I mean "Oh damn, thats getting HOT!"

 

[Mooch]

It's all about the battery temperature. Whether by short circuit, or by continuous or pulsed current, that's what causes problems..

Any battery discharging, continuous or in pulses, can be a problem if they heat up the battery enough. Pulsed current allows the battery to cool between pulses. But if the pulses themselves are above what the battery can handle continuously without overheating, then the pulses can still average out to a current level that is too high.

It all depends on how too damn hot your batteries are getting. It's fairly hard to get them to vent merely by pulsing at very high current levels. But, they are getting damaged. This will reduce their capacity and can increase their internal resistance (possibly making them even hotter the next time).

You could switch to HB6's if you want to run things cooler. They're the lowest running temperature 18650 batteries I've seen. Low capacity, but that's the classic tradeoff.

 

[3unu(h-80m83r]

Im kinda having the same problem, but it seems like my mod is getting hotter than the batteries.... Is it ok?

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[Mike H.]

Im kinda having the same problem, but it seems like my mod is getting hotter than the batteries.... Is it ok?

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That heat is coming more from the atty or tank than anything...keep in mind this heat will transfer to the battery so, still possibly damaging the cells in that sense with the added heat...Heat is the number one killer of batteries.

 

[BreeZyCloudZ]

It's all about the battery temperature. Whether by short circuit, or by continuous or pulsed current, that's what causes problems..

Any battery discharging, continuous or in pulses, can be a problem if they heat up the battery enough. Pulsed current allows the battery to cool between pulses. But if the pulses themselves are above what the battery can handle continuously without overheating, then the pulses can still average out to a current level that is too high.

It all depends on how too damn hot your batteries are getting. It's fairly hard to get them to vent merely by pulsing at very high current levels. But, they are getting damaged. This will reduce their capacity and can increase their internal resistance (possibly making them even hotter the next time).

You could switch to HB6's if you want to run things cooler. They're the lowest running temperature 18650 batteries I've seen. Low capacity, but that's the classic tradeoff.

Mooch, you are the man! I think alot of people need to be informed of this cause I couldnt find anything on it. I thought this was the case but I've seen people say they chain vape all day. Thank you once again!

 

[Jon@LiionWholesale]

Batteries can get quite warm if they're being pushed which is fine but as Mooch said they can get too hot. Battery damaging temperature depends on the battery but is generally something along the lines of 75 or 80 degrees C which is around 160-175 F....i.e. very hot. You can't really hold the batteries in your hand at this temperature. So that gives you a general ballpark...if you can hold the battery comfortably you're good. Unless you're some kind of mutant or kung fu master or something, then you need a thermometer.

 

[3unu(h-80m83r]

Ok, wondering if this is ok.. is my mod pushing my batteries too hard I have samsung imr 25rs and it's telling me the amps are around 30 its the ijoy asolo and the batteries are in series

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[NemesisVaper]

The amp figure isn't from the batteries. It's what the atty is being fed by the board.

Amps drawn from cells on a regulated device:

Wattage set ÷ battery voltage (not the voltage shown on screen.

To get battery voltage you need a mod that will show you or, more commonly a multi meter. For a series mod, measure one cell then double it. Worst case draw is wattage set ÷ cut off voltage which is around 6.4V on a series mod, or 3.2V on single cell and parallel.

 

[3unu(h-80m83r]

So I can go to 6.4 and be safe? Not going anywhere near that just trips me out because of all the "get the vtc 4 out you're gonna die" thing

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[NemesisVaper]

At 6.4 Volts the mod won't fire any way. Like I say, plug in your wattage set into the equation wattage ÷ battery voltage.

Amp draw increases as the battery voltage drops, so if you want worst case draw use 6.4V as the battery voltage.

 

[3unu(h-80m83r]

160÷3.7
=43.2432432432 nominal voltage... Is this safe or is it drawing 43 amps out of 20 amp batteries? But if fully charged 160÷4.2
=38.0952380952 this is still to high for my 20 amp batteries?

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[NemesisVaper]

You've got two cells in series mate so you need to double the voltage.

 

[3unu(h-80m83r]

Ok, so im a little above... But is it bad? Like 21 amps

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[NemesisVaper]

May bother some, but I'd be totally fine with it. For the vast majority of the time you'll be at or under 20A.

I calculate amp draw for my mods by how I Vape them. If you're vaping at 160W then maybe get some 25A HD2 or some VTC4. If you're vaping at around 120W or less you're good. Using max wattage of the mod is true ly worst case. If you'll never set it that high, use the very highest you will Vape at instead. As your tastes change you may need to get different cells.

You're definitely not going to die a horrible death by not using VTC4. I really dont like that cell personally in mechs and don't Vape at a high enough wattage to need them in a regulated mod. Very happy with 25R, HD2 and HB6. I was going to say that I think VTC4 are wank, but I don't want to upset anyone ;-)

 

[Slurp812]

160÷3.7
=43.2432432432 nominal voltage... Is this safe or is it drawing 43 amps out of 20 amp batteries? But if fully charged 160÷4.2
=38.0952380952 this is still to high for my 20 amp batteries?

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That would be 160/7.4 Better, but still pushing it.

 

[Slurp812]

May bother some, but I'd be totally fine with it. For the vast majority of the time you'll be at or under 20A.

I calculate amp draw for my mods by how I Vape them. If you're vaping at 160W then maybe get some 25A HD2 or some VTC4. If you're vaping at around 120W or less you're good. Using max wattage of the mod is true ly worst case. If you'll never set it that high, use the very highest you will Vape at instead. As your tastes change you may need to get different cells.

You're definitely not going to die a horrible death by not using VTC4. I really dont like that cell personally in mechs and don't Vape at a high enough wattage to need them in a regulated mod. Very happy with 25R, HD2 and HB6. I was going to say that I think VTC4 are wank, but I don't want to upset anyone ;-)

VTC4 are good, but not at double the price...

 

[NemesisVaper]

VTC4 are good, but not at double the price...

I've not had a great experience with them in a mech to be honest. Had several genuine sets and they all seemed lacking. My HD2 seem to take longer to drop off and they're lower in capacity.... Strange. Can't moan at their current handling ability, but unregulated I'm really not impressed. For a cloud comp they'd be alright but if you're vaping on them as normal from 4.2V through 3.4 (or what ever ones preference is) I've been very disappointed.

LG HB6 continue to impress me. They really don't last long though. Very good "house batteries" for when you're right next to the charger.

 

[Slurp812]

LOL @ house batteries!

 

[gracechen]

Ok, wondering if this is ok.. is my mod pushing my batteries too hard I have samsung imr 25rs and it's telling me the amps are around 30 its the ijoy asolo and the batteries are in series

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if you don't need to use the mod at 200w, you can use 25rs, just to make sure the battery have enough power to the tank. and that won't cause any problem.

 

[Bean8379]

OK so I know chain smoking is smoking cigarettes back to back, but this seems like a good opportunity to ask, what is chain vaping?

 

[NemesisVaper]

OK so I know chain smoking is smoking cigarettes back to back, but this seems like a good opportunity to ask, what is chain vaping?

Pretty much the same kind of thing, but constantly being on the Vape rather than the cigs.

 

[battery bro]

Rule of thumb: Keep your 18650 under 60 degrees C.