Highest current 16340 cell?

[rhd]

The AW IMR 16340s can do a max safe discharge rate of about 4.4 A

Is anyone aware of any 16340 cells that can do better? It seems like there should be LifePo4s that can best this figure, but I can only find relatively low current LifePo4 16340s.

 

[LaZeRz]

May I ask why you need 16340 cells? Your projects are usually interesting, thats why im asking

 

[rhd]

I have a host that can accommodate a C-Mount diode (which needs a lot of current), but unfortunately, the host only takes 16340s.

I've been hoping PontaicG5 would have the 12mm C-Mount modules available, but I don't know whether he's still tackling those. So I'm trying to improvise.

 

[LaZeRz]

Oh, Thats good and bad.

Good part is that your making a C-mount.

bad news is runtime and discharge rates.

I'l look around for you

 

[rhd]

Thanks!

Run-time is not a concern for me. The heat issue will be such that duty cycles are incredibly low anyway. Discharge rate, obviously, is a concern.

 

[LaZeRz]

Im guessing the c-mount takes 10-15 amps of current, am I right?

Best luck in finding a suitable battery!

 

[rhd]

Im guessing the c-mount takes 10-15 amps of current, am I right?

Best luck in finding a suitable battery!

No, more like 6A.

I've seen Lipo (or LifePo4?) 18650s that can do 20A safely. So by logic, there should be some 16340s that can do 6A.

 

[LaZeRz]

Ah, I see

Well, I will continue searching!

AW sell 17670 or something of the sort batteries but im not sure about discharge rates and ofcourse thats only 1 cell instead of two

 

[rhd]

Well a 17670 would be out of the question - too big.

My host can only hold a single 16340. Possibly a 17340 (but those are rare)

 

[LaZeRz]

Oh woops, when you said it can take 16340's I automatically thought it took more than 1 cell. My bad.

 

[Ra1nfade]

Is it a host that looks as though it can be bored to accept 18mm cells?

 

[rhd]

I don't have it with me right now, but from memory that would create huge problems with threading. I think the body is female threaded (threaded on the inside). So boring it out larger would remove those threads. Even if re-threaded, the tailcap would be too small.

So I really think I'm stuck with needing to find a high current 16340.

But either 3V or 3.6V cells are ok.

 

[Ra1nfade]

I see, if it was bored the threads would have to be reformed and a new cap would have to made to accomadate the larger diameter.

 

[rhd]

I see, if it was bored the threads would have to be reformed and a new cap would have to made to accomadate the larger diameter.

In which case, I might as well just get a custom host machined.

So for this to actually be a time saver (ie, using the C-Mount host I have, as opposed to trying to get some custom 12mm modules machined by eMachineShop, etc), I really need to find a high current 16340.

 

[BShanahan14rulz]

It needs 6A at what voltage? If the voltage is low enough, why not just go for the AW imr16340? It should get you close, assuming you find a suitable buck driver, or are you trying to stick witha linear one?

 

[rhd]

It needs 6A at what voltage? If the voltage is low enough, why not just go for the AW imr16340? It should get you close, assuming you find a suitable buck driver, or are you trying to stick witha linear one?

That would be an interesting approach, but I want / need the ability to diy a driver. The specs of my diode will need to be trial and errored to some extent, and I'm not familiar enough with high current buck drivers to be able to tailor one to my needs here.

Plus, I suspect a Vf of ~3V. I'm doubtful that the excess voltage provided by a 4V AW IMR would be enough to turn 4 A (in reality) of input current into the 6 A of output current my die needs -especially after efficiency losses are taken into account.