Exceeded Volt threshold?

A couple of noob questions and THANK YOU in advance for all the answers.

My LG HE4 fully charged is 4.20 Volt.

Box MOD: IPV D2
My current setting is :
16.5W, 1.10 Ohm, 4.26V

Q:
1) Does that means I'm not allowed to exceed 4.20 V with my ipv d2?
2) If I continue exceeding 4.20V, will it shorten the battery life or even worst, explode?

Cheers.



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Battery life is expected to be shorter the harder the batteries work. I'm guessing the current draw is only 4A, the HE4 is good for 20(+).

You could fire that build at 8-10v with no issues battery wise. Not that I'm suggesting you do

 

Thanks a lot my friends.. Please correct me if I'm wrong. That means battery's Max Volt is not the main concern here, as long as I'm using a reputable, authentic and recommended IMR18650? And of course, finding the sweet spot is more important, right?

Cheers.

 

@etlava , from what I understand li ion batteries normal operating voltages are around 3.5v to 4.2v ... In unregulated mod, that means the voltage delivered to the coil is the same as the battery's present voltage when you hit "fire" button.

Li ion batteries also have discharge amp ratings, often good quality vaping batteries like the VTC4 VTC5 from Sony have like 30A, I think LGs are similar ... In unregulated mod this equates to maximum 4.2v multiplied by 30A, which equals 126W (watts = volts x amps), as an approximated maximum wattage.

Regulated mods have additional circuit "trickery", which often can manipulate voltage and wattage, hence variable wattage (VW) and variable voltage (VV). So the components inside the mod, allow the mod to potentially send higher volts than the battery is rated at, to the coil.

Regulated mods can also send higher wattage than the battery or batteries are rated at, they do this by "pulsing" at a higher wattage, so not a continuous "burn". Or at least that's my current understanding.

This is my current simplified understanding of mods, happy to be corrected if there's something I missed.

Measuring voltage can vary from one measuring device to another. So it's possible it might read 4.2v in your charger, and 4.26v in your mod. Also :

"high capacity Li-ion may go to 4.30V/cell and higher." - batteryuniversity.com ... So 4.26v is almost certainly within safe operating voltages for your LGs.

Li ion batteries if of good quality and looked after properly, and used in good quality/non faulty equipment, well, safety concerns are minimal. Most people these days have phone, tablet and laptop, or similar, all containing li ion batteries and NEVER experience ANY problems.

So, no I don't think max volts is a concern as you've presented it ... And finding a sweet spot, well, that's a continual search in life isn't it?

 

Pulsing is just a way to deliver power accurately in an easier manner. A constant power delivery without pulsing is harder to acheive but a much better way for vaping in my opinion as it smooths everything out.Most of the cheaper mods will use pulsing. Having said that I am sure there is a good number of high end mods that do this as well. lol

 

Hence - "approximated maximum voltage", and not "safe operating wattage".

And yes I'm still getting to grips myself with resistances of coils, in conjunction with the mods, so thanks for the link, helpful.

Have several buck and boost modules sat on my desk right now, and just built some LM7809 9v regulated circuits myself, so yes, but wasn't sure would help OPs understanding in my going into underlying tech

I've seen at least one video so far of a 200w mod, where the coil is clearly pulsing at higher wattages, presumably because batts couldn't supply the full 200w or perhaps a safety feature. I don't know enough about the specifics, so will take that with a pinch of salt, for now, as pulsing would be one way to stick "200w" on a mod that's in reality not able to deliver that much power.

Update - @Longtail1 posted whilst I was writing this, seems to concur with what I said already about pulsing on cheaper mods. You get what you pay for !

Not sure that OPs equipment is accurate enough to measure down to 0.06v above 4.2v conclusively, and charger takes care of charging to safe operating voltage. And TBH, not used his equipment so I don't know whether it's a regulated 4.26v or if that's the reading off the battery, that he's talking about, assuming a regulated 4.26v. In either case I can't see an overcharge issue, which has been verified with professional (certified and calibrated) equipment, in a more ideal test situation. I can't even offer to do it for him, as I don't have access to those facilities.

The spec sheet for those LGs says 4.2v, and since he indicated this is what the charger is reading, I can't see any indication of overcharge issue.

And yes totally, I've invested a bit of time and money in selecting good quality chargers, my XTAR should arrive soon, very grateful for your help with that

Happy new year !

 

Mostly was trying to keep it simple and not make into a blog post, thought would help the OP. I haven't studied the circuits in Mods in detail, so just putting together what I assume is going on. Obviously there's multiple electronic wizardry, the Chinese are clever

There's different types of pulsing in electronics, and I thought easier to understand than yet more acronyms in vaping, having a hard time myself remembering them all, along with the million and one brands and types ...

"Altering" circuits (for VV,VW, VT) will be things like voltage regulators, buck/boost converters, mosfets (transistors) and almost certainly PWM, amongst other things. Not that I'm electronics expert, just a persistent amateur.

I suspect pulsing is quite common with higher power mods, as converter and regulator circuits seem to get bulky over about 2 or 3 amps, and 200w at 3.7v is a whopping 54AMPs !

Sometimes I do, but I don't always get things right - this is how we learn, right ?

 

PS, just read the links, and yes exactly this will be the type of thing going on, pulsing is a way to regulate electricity, don't know if it's inferior or superior way of doing it, could be superior - after all I think "superior" power supplies use high frequency switching to reduce size and bulk of circuit, and increase efficiency

 

You and me both dude, but at least we've educated ourselves a little, enough to be able to find out what we don't know ...

I dunno yet whether I'll bother with 200w mod. I think vaping is probably set to go and stay sub ohm, but this can be done with < 50-60w ... And yes why waste battery power and liquid on big clouds ... Although, ask me again in a year, maybe I'll be saying a different story !