Pulse discharge battery ratings aren't going to happen

[Mooch]

I failed :-(

For the past couple of months I have been working on a method to assign pulse discharge ratings to the batteries I test. But there have been so many problems trying to standardize the ratings that I am giving up. Add on the safety issues and it's just not going to happen.

But, all is not lost for those who want to know how their batteries perform when pulsed. The soon-to-be-released 26650 battery test results will use the new version of the ratings table. This table condenses the confusing continuous current safety ratings down into one simple pass/fail number. It also adds pulse performance data and a performance score (see photos) at a level below the continuous current level that would overheat the battery.

I'll be discussing this new table more after I release the 26650 testing results.

 

[Jim_ MDP]

For the past couple of months I have been working on a method to assign pulse discharge ratings to the batteries I test. But there have been so many problems trying to standardize the ratings that I am giving up. Add on the safety issues and it's just not going to happen.

Sucks, but Ok. Knew it was going to be an uphill slog, but better to just set it aside than drive yourself nuts over it. Who knows, maybe somewhere down the road, you'll revisit the challenge.

And just knowing it's a thornier issue than thought is information in itself.
As always... you're looking out for battery safety and that means our safety, and I we all thank you for that.

 

[r77r7r]

TY Mooch!

 

[KenD]

I'm not sad nor disappointed actually. Kinda goes to show that pulse ratings are all but useless, doesn't it?

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[inspects]

Thanks for all you do Mooch...!

 

[Jim_ MDP]

I'm not sad nor disappointed actually. Kinda goes to show that pulse ratings are all but useless, doesn't it?

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That's really not how science works. Not even a little bit.

 

[KenD]

That's really not how science works. Not even a little bit.

Hey, I'm a liberal arts guy, what do I know

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[Jim_ MDP]

Fair enough.

(ex-NASA here )

 

[Marc411]

Appreciate you giving it a shot Mooch.

 

[Robert Cromwell]

Thanks for the shot at it Mooch. Just watched Plumes and found about this on there.
I knew it was problematic at best.
Stay within the CDR rating of your battery.
Anything else is battery abuse.

 

[Jim_ MDP]

...
Stay within the CDR rating of your battery.
Anything else is battery abuse.

Speaking solely for myself... I don't think that's the takeaway here.

 

[Robert Cromwell]

Any current over the CDR will do some damage to your battery and shorten it's life.
Some handle abuse better than others.

I vape some low CDR batteries and stay within their CDR. I use them in regulated devices that cannot draw more current than the CDR of the battery.

I use HG2's in higher wattage devices.

If I can't vape staying within the CDR of my battery I do not vape that way.

Just my opinion though.

My takeaway is that there is no way to properly pulse rate a battery.
So do not use one based on it's pulse rating.

 

[Jim_ MDP]

Any current over the CDR will do some damage to your battery and shorten it's life.
...

And I don't believe that to be a factual statement.

It is potential true though, so I'm trying to care... it's not happening.
(we're not talking about hazardous damage, just the potentially life cycle shortening type)

 

[suprtrkr]

Thanks for the shot, Mooch. Not to worry. I would have been interested, but most people just want to know what battery to buy to put in their mod. Your original chart does that just fine

 

[Train2]

I'm not sad nor disappointed actually. Kinda goes to show that pulse ratings are all but useless, doesn't it?

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That's really not how science works. Not even a little bit.

You're implying that the pulse ratings being published for batteries currently are "science"?
I'm not too sure...
Heck - we've seen the published Amp ratings... Science done by Mooch here DOES kind of IMPLY that determining a useful "Pulse Rating" is fairly complex - and makes it somewhat likely that the ones bragged about in battery advertising might be nonsense (and non-science).

 

[Jim_ MDP]

You're implying that the pulse ratings being published for batteries currently are "science"?
I'm not too sure...

As far as I know... only Samsung makes honest pulse ratings available.
Because the pulses are specified, and graded against a measurement.
No one mentioned what I presume you're referring to... inflated specs by re-wrappers.
With no disclosure of controls and specs.

Regarding "science"...
The suggestion was made that pulse ratings would be useless.
The effort to determine such a rating system is science.
If an effort produces new information, even if it fails to achieve it's goal... it's useful.
That's the very essence of science. And Mooch does it well.

I'll just add... "science" is not something relegated to brightly lit labs populated by arcane glassware and white coats. It's a process, a frame of mind, and an organized approach to discovering knowledge. We've probably all done it, even if only in minor ways and not even aware of it.

 

[Layzee Vaper]

Thanks Mooch, I don't think you have failed, more than enough information for people to make an informed decision on battery usage.

 

[edyle]

@Mooch
how did you 'pulse at a certain current' ?

 

[nyiddle]

If I can't vape staying within the CDR of my battery I do not vape that way.

Same. This concept seems pretty simple. I don't need 20A going to my atomizer under any circumstance, really.

But yeah, as @KenD said, this just further proves that pulse ratings are pretty much irrelevant and, given that they're so hard to determine, likely to be inflated or estimated. So we still learned something, therefore, not a fail.

 

[edyle]

hmm
20 amps for over an hour?
That's over 20,000 mAh

CORRECTION:
ok, 5sec on and 30 seconds off
so 80 min works out to maybe .... 800 seconds... about .. 13min... 0.22 hours

20 x 0.22 = 4.4 amp hours.

4400 mAh.

hmmmm. still higher than what I was expecting