32650 Protected D size li-ion Tested at 3 amps

[Rocketvapor]

Has the source for these 32650 cells changed?
I got 3 and the first would not accept charge.
The supplier has offered to replace it, but I have not received it yet.
The second one has also shut down.
My application is an electronic cigarette mod.
Using 1.5 ohms this second cell outlasted a pair of 18650 Li-ion cells (2600mah Tenergy), a 4000mah LiMnNi,
and a 3600mah LiMnNiCo cell. I was happy. Upon recharging (0.1 C) the cell shut down at 4.11 volts.
Voiding the possibility of returning it, I opened the plastic wrapper and found a rather noxious liquid has leaked from the cell.
The cell is now outside.
After washing (in 91% IPA) the protection board now works.
These were Green wrapped cells.
Anyone check theirs for leakage?

[Rocketvapor]

If if goes through, here is a pics of the 32650 (32700) that leaked on me. Notice that the protection board is on the positive end.
I have not drawn the circuit to see what is different from the normal Li-ion boards, yet.
After cleaning the board and drying, it seems to work fine.
2nd pic is the 32mm board temporarily attached to a 18650 tabbed cell.
The P+ lead can not be seen in this photo. It runs under the cell to the + charger terminal.

http://i965.photobucket.com/albums/a...32650_LEAK.jpg
http://i965.photobucket.com/albums/a.../32mmBoard.jpg

[Rocketvapor]

The cell that leaked did not run warm. It did not seem to mind being run into a 1.5 ohm load for 4 to 6 seconds at a time.
Even though this was an e-cig application, this type of load is much less than you would expect from some lights. I did not measure the mah capacity but it easily exceeded 18650 and 26650 cells I have.


Charging was done with a 500ma e-cig charger. Charge termination was 4.19 volts for the first cycle but the cell shut down on the 2nd charge cycle. Cell voltage was 4.11v at the cell, no output through the board.
It was not overcharged or overdischarged. It appears the leakage got to the board and caused it to shut off.

A leaking/venting Li-ion cell is not something to take lightly. Their was no external indication that the cell leaked.
Only after I decided to void any change of a refund or replacement, I opened the wrapper.
The protection board works after being washed and dried.



http://i965.photobucket.com/albums/a...32mmVs18mm.jpg

[Rocketvapor]

The vendor has sent me replacement cells. Really nice folks.
I did a little work with the protection board and identified the Mosfets and the Polyswitch on the board.
The two Mosfets are singles connected 'back-to-back' whereas the 18650 protection board use dual Mosfets in a single chip. The ones I have use two dual Mosfets.
The polyswitch is rated 2.6 amp continuous/5 amp max.
At 3 amps the 32650 protection board drops about 200 mv, and costs about 900 mah over the full charge.

[moderator007]

Hi Rocketvapor, I have never had one to leak. Never had any li-ion to leak for that matter. I still have the original blue ones that were tested at the start of this thread. No problems what so every. I did receive one that had the pcb almost ripped of the battery. I would assume from shipping handlers. Looked like it had been droped hard on the corner of the bottom of the battery right where the pcb is. The shrink wrap was tore almost all the way around the battery exactly where the pcb was.

Its possible you could have received a battery that had took a hard drop also. I know that Nimh's when droped can do damage to the battery. Because of the thin construction trying to gain as much capacity as possible. Don't know if this applies to li-ion's. Maybe someone else here does?

Glad you got replacement cells. I had no problems getting a replacement cell for the damage one I received even though it was probably not their fault. They were very easy to deal with and seemed to go out of their way to make it right.

Thanks for the info above.

[Rocketvapor]

Did your 'Blue ones' have the PCB on the negative end, or like the Green ones I got with the board at the positive end?
and Adrian has been about the nicest you could ask for.

[dwminer]

I have four of these that I removed the protection boards and use two at a time in a TK 70. So far no problems.

[moderator007]

Did your 'Blue ones' have the PCB on the negative end, or like the Green ones I got with the board at the positive end?
and Adrian has been about the nicest you could ask for.

The blue ones have the pcb at the negative end. I also have couple sets of the green ones which are at the positive end. I like the blue ones the best. Sometime after receiving a couple of sets of the blue ones they switched to green ones. I have no idea why or if its the exact same battery. But does seem to test out about the same. So it was probably just green shrink wrapped with a positive pcb added to the same battery.

[Thr3Evo]

Well, I purchased these cells about a month ago, charged them when they arrived and waited for more parts to start on a triple xml Shorty mag with the slave boards mod. Last night I prewired everything to make sure I have all systems go and sure enough, worked like a charm. I'm using the KD 7135 drivers and if the manufacturer specs of the drivers are correct this cell should be pumping out around 3 amps to each driver. So yes these cells (protected) are capable of supplying more than the discharge rate stated on the website.

[CTS]

I did contact them (novae) and received a email back stating that they do have these in stock.

Do you have contact information for Novae? They are not responding to inquiries on their webform and the email address supplied with the Paypal receipt is bouncing back.

I'd like to receive my batteries and I'd prefer not to have to file a chargeback.

[moderator007]

Do you have contact information for Novae? They are not responding to inquiries on their webform and the email address supplied with the Paypal receipt is bouncing back.

I'd like to receive my batteries and I'd prefer not to have to file a chargeback.

PM Sent