Joyetech Evic Primo 2 - exploded component

[Scor]

Hello everyone!
My eVic primo 2 stopped charging 18650 batteries. It's an old model but I love it so much!
I opened the vape to clean it up and saw the exploded part. I am trying to determine what exactly this detail is. It looks a lot like a regular battery "pill".
I am attaching a photo, I will be grateful for advice or help.

 

[puffon]

If I remember the mod had a clock.
Maybe the internal battery for the clock?

 

[Scor]

If I remember the mod had a clock.
Maybe the internal battery for the clock?

That's right, this mod has a clock and kind of calendar. But in which way I can identify this battery?

 

[puffon]

That's right, this mod has a clock and kind of calendar. But in which way I can identify this battery?

I'm not sure, never had one apart.
I have many VTC Mini's that have an internal battery for the clock.
Seems the mod should still work even if that battery is dead?
It's just used to keep the time when no 18650s are installed.

 

[Scor]

Seems the mod should still work even if that battery is dead?
It's just used to keep the time when no 18650s are installed.

Thats sound smart but the circuit could close via this battery on charging mode...

 

[puffon]

Thats sound smart but the circuit could close via this battery on charging mode...

That's true.
I've never charged using the onboard charging.

 

[Scor]

That's true.
I've never charged using the onboard charging.

I do only this way ))

 

[Coyote628]

I do only this way ))

That is most likely the problem. For charging batteries, an external charger is best. Though its possible to charge batteries with the mod, its not the best way and eventually you get what you have here.

 

[Hawise]

That is most likely the problem. For charging batteries, an external charger is best. Though its possible to charge batteries with the mod, its not the best way and eventually you get what you have here.

To clarify, charging a battery in an enclosed space, like a mod, can generate more heat than is healthy for the battery or the board and its components. That's one reason why external chargers are often recommended.

I'd suggest contacting the manufacturer to see if they'll identify the blown bit. Failing that, if the mod's working apart from the charging function, you could continue to use it with an external charger.

 

[UncLeJunkLe]

Well if you are certain that the PCB contains a button cell battery for the clock and you can't find it anywhere else on the PCB, then that must be the battery. Looks like it sits in a cone spring. Try taking it out to see if you can discern what size it is.

On the PCB, it says right next to it either SW305 or SW3D5. Not sure which it is, but searching on Google doesn't help. But any button cell that would fit might work.

Problems:
1) Whatever caused the meltdown will probably ruin any new battery you put in it.
2) The fact that you had a meltdown tells me the mod is likely unsafe to use.
3) There are a few other components on that PCB that look to be in bad shape, this also indicates the mod may be unsafe to use and these poor components may even be the cause of the meltdown to begin with.
4) It's an old mod and even though you like it, all of the above pretty much dictate that it's time to retire that mod.

 

[BrotherBob]

Hello everyone!

Welcome and glad you joined.

 

[Scor]

Looks like it sits in a cone spring.

No, it is soldered. That's strange, right?

On the PCB, it says right next to it either SW305 or SW3D5.

No, I see "C51".

I'd suggest contacting the manufacturer

It can work, but I don't know if they answer nor how to contact them.

 

[DavidOck]

"C" on a printed circuit board usually designates a capacitor.

 

[UncLeJunkLe]

"C" on a printed circuit board usually designates a capacitor.

And that looks like a capacitor right below the "C51", and it also looks blown lol. Too far away from the battery. The SW305 or SW3D5 on the other hand is very close to the designated area for the battery.