sealed battery vs unsealed, pros and cons?

[paulw2014]

I think I remember someone talking about sealed batteries and unsealed before. As I understand it, the Ego is a sealed battery because the battery cell is "sealed" inside a metal shell, and we can't easily change the cell. Others, like the Tesla, is "unsealed" because we can change the cell inside. Is that correct?

Anyway, the pros and cons. Obviously being able to change cells is nice, but what about safety?

Are sealed batteries safer because the casing protects you in case the battery leaks or explode?

 

[scalewiz]

"Sealing" a battery inside a container is never a good idea. Should anything go wrong with the battery, the only way for it to expand/vent is to break the seal; this can create a VERY dangerous situation. Pipe bomb?

 

[degnr8]

Also bear in mind that what you're calling sealed batteries use lithium polymer which is much more volatile than the Li-ion or IMR replaceable cells we use in mods. Your best bet is to get a mod and some AW IMR batteries.

 

[Ryedan]

The terms sealed and unsealed in batteries is AFAIK only used in reference to lead acid batteries. As far as the casing goes, we never seal a battery in anything because it is not the batteries that explode (they can burn enthusiastically though), rather the battery venting powerfully and/or burning causing the casing to explode because of the pressure increase if it is sealed.

 

[gingko.leaf]

for ego, i think we use packed much better than sealed, it's not so vacuum. And when batt explode, it's the inner cell problem, people never say it's the shell problem. The shell increases batt reliability as to explode, not Make it more dangerous.

and i agree, lithium polymer which is much more volatile than the Li-ion or IMR replaceable cells. two different things.

 

[paulw2014]

The terms sealed and unsealed in batteries is AFAIK only used in reference to lead acid batteries. As far as the casing goes, we never seal a battery in anything because it is not the batteries that explode (they can burn enthusiastically though), rather the battery venting powerfully and/or burning causing the casing to explode because of the pressure increase if it is sealed.

So therefore, batteries like the EGO T or Ego twist can have explosive shrapnel potential?

 

[paulw2014]

"Sealing" a battery inside a container is never a good idea. Should anything go wrong with the battery, the only way for it to expand/vent is to break the seal; this can create a VERY dangerous situation. Pipe bomb?

but isn't the Ego and most e cig batteries out there like this?

 

[Myrany]

So therefore, batteries like the EGO T or Ego twist can have explosive shrapnel potential?

There is a reason the connector and bottom of an ego is press fit not glued on. If the battery vents top and bottom will pop off allowing the pressure to equalize.

 

[Baditude]

So therefore, batteries like the EGO T or Ego twist can have explosive shrapnel potential?

but isn't the Ego and most e cig batteries out there like this?

All batteries have the potential to vent hot gas, some can release flames or even explode when they go into thermal runaway.

Ego batteries and the replaceable batteries that the mods use are Li Ion chemistry. There are different chemistries involved: protected Lion, IMR (Li Mn), and the new hybrids. For the replaceable batteries, the IMR are considered a safer chemistry than protected Li Ion and are now recommended for both mechanical and regulated VV mods.

The better replaceable batteries have vent holes around the nipple of button top batteries to assist venting. The ego batteries are designed to to pop off at the bottom end to allow venting.

Battery Basics for Mods: IMR or Protected?

http://www.e-cigarette-forum.com/forum/ecf-library/129569-rechargeable-batteries.html

Below are images of IMR or protected Li Ion batteries where something went wrong, most likely from user error. Practice safe battery habits.

 

[Rickajho]

Guys you're really all... wrong.

The only time the terms "sealed" and "unsealed" come up in context of vaping batteries is with: automatic batteries.

All auto batteries have to have some kind of vent hole in them to get the auto sensor to function. In what is known as an "unsealed" auto battery that vent hole is right in the middle of the positive post. It's very easy for a flooding accident to allow liquid to get into the battery through that vent hole, ruining it in the process.

Someone came up with a better idea. They moved the sensor vent hole from the very center of the positive post to the side instead - where the 510 threads are on the battery. As a misnomer, companies started claiming these were "sealed automatic" batteries. Well, the top post is now sealed, but it still has sensor vent holes in the battery. The chances of a flooding accident are reduced with a "sealed automatic" but not eliminated. The holes for the auto function are still there - they were just moved. There can be no such thing as a truly sealed auto battery. If you can't draw air across the auto sensor it just can't work.

The only context I have ever heard the terms "sealed" versus "unsealed" come up is in context of automatic batteries - something hardly anyone uses any more.

 

[degnr8]

Guys you're really all... wrong.

The only time the terms "sealed" and "unsealed" come up in context of vaping batteries is with: automatic batteries.

All auto batteries have to have some kind of vent hole in them to get the auto sensor to function. In what is known as an "unsealed" auto battery that vent hole is right in the middle of the positive post. It's very easy for a flooding accident to allow liquid to get into the battery through that vent hole, ruining it in the process.

Someone came up with a better idea. They moved the sensor vent hole from the very center of the positive post to the side instead - where the 510 threads are on the battery. As a misnomer, companies started claiming these were "sealed automatic" batteries. Well, the top post is now sealed, but it still has sensor vent holes in the battery. The chances of a flooding accident are reduced with a "sealed automatic" but not eliminated. The holes for the auto function are still there - they were just moved. There can be no such thing as a truly sealed auto battery. If you can't draw air across the auto sensor it just can't work.

The only context I have ever heard the terms "sealed" versus "unsealed" come up is in context of automatic batteries - something hardly anyone uses any more.

Oll Korrect (the origin of OK) but not at all what the OP was asking about

 

[DancingHeretik]

Oll Korrect (the origin of OK) but not at all what the OP was asking about

He was asking about 2 things. Rick answered the sealed vs. unsealed terminology question correctly. Which no one else had bothered to do.

 

[Ryedan]

So therefore, batteries like the EGO T or Ego twist can have explosive shrapnel potential?

Those batteries are not really sealed by the case. The bottom plates are lose and they can vent around the switch. I have heard they can go flying when the battery vents though, which has AFAIK only happened when they are on charge.

 

[Ryedan]

Guys you're really all... wrong.

The only time the terms "sealed" and "unsealed" come up in context of vaping batteries is with: automatic batteries.

Hah, good catch Rick. You may have nailed it! Hopefully the OP will let us know.