TENPOWER 50XG survives test to 239.9 a

[Bille]

Funny I don't see anyone discussing this cell here ?

Bille

 

[BlueSwordM]

We discuss a lot about the cell actually.

It's a great cell with slightly better performance than the RS50, best pulse discharge performance out of current high power 21700 cells.

However, it isn't the toughest (that award goes to the RS50 with its tougher cathode setup), nor does it have the best very high current sustained discharge performance (the Ampace JP50 is special in this regard).

It's a great cell, but not the top performer in the categories that matter the most.

 

[BatteryMooch]

It's a great cell, but not the top performer in the categories that matter the most.

Depends on what the priorities are.
As you mentioned, it has great pulse performance.

But all of the top not-actually-tabless-but-called-tabless cells perform so close to each other that they all need to be tested in each particular application to really choose the best performer, longest life, etc. And even then I don't think there will be any noticeable differences except in cycle life.

 

[Bille]

We discuss a lot about the cell actually.
...
However, it isn't the toughest (that award goes to the RS50 with its tougher cathode setup), nor does it have the best very high current sustained discharge performance (the Ampace JP50 is special in this regard).
...

I did use the forum search funtion ; I will try to do a better job of it , next time.

So the other two cells you mentioned ; they might
have a longer cycle life ?

The pack I eventually want to learn to make , will pull near 200a , but in
parallel each cell would never see over 50a ; so that ultra high discharge , kinda
doesn't qualify as necessary ?

On the Ampace cell :
I had a JP40 , 6s , 2p pack made for me over a year ago , and it had over 500
cycles on it when this video was made . It's spiking near 100a on each
flight , and comes down just warm to the touch !! So yes BlueSword ; I
believe you.

Bille

 

[j bjork]

Check out the cell test threads:

Tabless design cylindrical cells tests

Please note: You can find my other tests on my Patreon channel www.patreon.com/Pajda704 These tests will not be available anywhere else for a certain period of time. By subscribing, you will also support my future work here on the ES DIY forum. EVE 40PL sample: EVE 40PL disassembly BAK...

endless-sphere.com

On the last pages you can see a lot about the 50XG

 

[BatteryMooch]

The pack I eventually want to learn to make , will pull near 200a , but in
parallel each cell would never see over 50a ; so that ultra high discharge , kinda
doesn't qualify as necessary ?

Never running a cell near its very high current rating is a great way to help extend the cycle life of the cell. Also, running at 50A is still very high and having a cell with an extremely high rating helps reduce the voltage sag in the cell and that helps extend run time.

 

[Bille]

@ BatteryMooch

So the high discharge rating ; it does qualify as necessary !!

Thanks for that : Bille

 

[BatteryMooch]

@ BatteryMooch

So the high discharge rating ; it does qualify as necessary !!

Thanks for that : Bille

Let‘s call it helpful.
It’s not necessary but it can definitely help improve performance and extend cycle life. If those things are priorities and are worth the, possibly, higher price you must pay then that rating is necessary. The lower cell temps can help improve safety a bit too since the cells won’t be stressed as much and that slows down aging and the increased cell temps that come from that aging.

 

[Bille]

Let‘s call it helpful.
... The lower cell temps can help improve safety a bit too since the cells won’t be stressed as much and that slows down aging and the increased cell temps that come from that aging.

I get it now !!
As mentioned on my JP40 pack that was totally mis-used in flight ; I figure
it has over 800 cycles now, and it's still running strong. I never did charge it over .8C
though ...

Bille