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LG Battery BS
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ogden:

--- Quote from: amyk on February 02, 2020, 08:18:16 pm ---In other words, according to the datasheet, their cells should not be exploding or catching fire when subjected to those abuses, and those that do are defective.... :-//

--- End quote ---
Cells in the video are green, LG cells are brown: https://www.18650batterystore.com/18650-p/lg-hg2.htm
[edit] I had to be corrected later. LG 18650 cell colors are all over the place, including green  :-DD U never know...
nctnico:

--- Quote from: amyk on February 02, 2020, 08:18:16 pm ---Looks like this thread has quite a few corporate shills too. :palm:

--- End quote ---
Ignorance is bliss.

--- Quote ---For an extra bit of irony, look at the datasheets for LG's own 18650s and particularly at the "safety" section:

--- End quote ---
Well... these are the results for testing new cells according to the UN38.3 regulations. These regulations also have requirements for the battery management systems. If you are going to use unprotected cells in a device designed for use with protected cells you are in big trouble. Overcharging and severe discharging will cause cell damage / deterioration which eventually can lead to the cell self-igniting.
wraper:

--- Quote from: ogden on February 02, 2020, 08:57:08 pm ---
--- Quote from: amyk on February 02, 2020, 08:18:16 pm ---In other words, according to the datasheet, their cells should not be exploding or catching fire when subjected to those abuses, and those that do are defective.... :-//

--- End quote ---
Cells in the video are green, LG cells are brown: https://www.18650batterystore.com/18650-p/lg-hg2.htm

--- End quote ---
LG makes cells of different color depending on model.
thm_w:

--- Quote from: amyk on February 02, 2020, 08:18:16 pm ---Looks like this thread has quite a few corporate shills too. :palm:

For an extra bit of irony, look at the datasheets for LG's own 18650s and particularly at the "safety" section:

https://www.eevblog.com/forum/chat/lg-battery-bs/?action=dlattach;attach=920904;image

In other words, according to the datasheet, their cells should not be exploding or catching fire when subjected to those abuses, and those that do are defective.... :-//

--- End quote ---

I wonder if there is any difference in spec, those are 3000mAh INR8650's which should have higher ESR. Vapers tend to use unprotected, high current capacity cells. Although 20mR I see in the datasheet seems very low.

They are saying short with a 100mR resistor so:
100mR + 20mR ESR => 4.2V / 0.120 = 35A peak current.

Some vapes are in the hundreds of mR, but I believe its rare, as the power would just be ridiculously high.
Who wants to measure the resistance of their keys?
EEVblog:

--- Quote from: tooki on February 02, 2020, 10:10:04 am ---It’s common knowledge among electronics experts that lithium ion cells have insanely high short circuit currents, far more than NiMH, and are much, much, much more susceptible to catastrophic damage resulting in fire. (Fire is NOT a common failure mode in NiMH cells, even if it’s possible.) I don’t think it’s fearmongering in any way to warn consumers away from bare LiIon cells, since most consumers have no idea just how badly a mishandled LiIon cell can behave.

--- End quote ---

Both Lithium Ion and NiMH are exothermic, so are essentially equivalent in their ability to have runaway thermal effects.
NiCd is endothermic.
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