Tabless design cylindrical cells tests

[BatteryMooch]

@BatteryMooch @Pajda I think you should buy yourselves nice flashlights:

Spend over $30 (total) for testing one Amprius cell?
I think you should buy @Pajda and I a nice flashlight.

 

[BlueSwordM]

Spend over $30 (total) for testing one Amprius cell?
I think you should buy @Pajda and I a nice flashlight.

Honestly, that wouldn't be a bad idea as a gift, but yes, it'd be preferably to order the cells separately

If Convoy managed to get the cells, that must mean another distributor must have the cells.

 

[BatteryMooch]

Honestly, that wouldn't be a bad idea as a gift, but yes, it'd be preferably to order the cells separately
If Convoy managed to get the cells, that must mean another distributor must have the cells.

Agreed, on both counts.

 

[Pajda]

@BatteryMooch @Pajda I think you should buy yourselves nice flashlights:

Convoy M21H 21700 flashlight - Convoy flashlight

Convoy M21H 21700 flashlight

convoylight.com

I recommend buying the 4000/5000k 4x519A light and with it, an Amprius 6500mAh SA112.

Doesn't seem like Simon stocked the Amprius SA112 separately.

If you want to order a cheaper light with this, the Convoy S21E LHP531 is also a good choice.

Thanks for the tip , I sent them an email to ask if they have them in stock. Now that I think about it, it may have sounded a little rude, in the spirit of saying that you offer amazing flashlights, but I am just intersted in the third-party cell you put in them...

 

[BlueSwordM]

Thanks for the tip , I sent them an email to ask if they have them in stock. Now that I think about it, it may have sounded a little rude, in the spirit of saying that you offer amazing flashlights, but I am just intersted in the third-party cell you put in them...

No need to worry. I assume Simon will sell them eventually by themselves.

 

[ZEUS-FL]

Guys just to share some results from testing different tabless cells at 50A CC. Also I include Non tabless for reference.
https://nelvick.com/50A

 

[Pajda]

Thanks Nelvick . The Ampace JP50 looks promising. Although the Tenpower 50XG performs slightly better in terms of power performance, the JP50 still has the potential to achieve better cycle life, which is unfortunately rather average for the 50XG.

 

[Nix Liou]

Honestly, that wouldn't be a bad idea as a gift, but yes, it'd be preferably to order the cells separately

If Convoy managed to get the cells, that must mean another distributor must have the cells.

I have talked to a sales rep at Amprius, and they are willing to sell small amounts of cells directly to people it seems like... I guess I'm not sure about the newer ones, but they told me that their model is that there's no MOQ, but you can get the cells for cheaper if you are buying 1000+ cells.

 

[Pajda]

No need to worry. I assume Simon will sell them eventually by themselves.

Yup, Simon just answered that it took one or two days to list them in his store.

 

[Eneko77]

Receiving Ampace JP50, Reliance RS50 and Tenpower XG50 next monday 12 january from Nkon. Did anybody tested Ampace JP50?

Do you know if this cells (all 3) are preproduction or are they industrialized ones?

Thanks!

 

[h1tec]

I have talked to a sales rep at Amprius, and they are willing to sell small amounts of cells directly to people it seems like... I guess I'm not sure about the newer ones, but they told me that their model is that there's no MOQ, but you can get the cells for cheaper if you are buying 1000+ cells.

Shipping costs were a bit rough though. I was going to buy from them before I found Shenzhen Cebattery Technology on Alibaba. Test video coming soon.

 

[BlueSwordM]

Receiving Ampace JP50, Reliance RS50 and Tenpower XG50 next monday 12 january from Nkon. Did anybody tested Ampace JP50?

Do you know if this cells (all 3) are preproduction or are they industrialized ones?

Thanks!

RS50 has been in full production for a while.
Tenpower 50XG should enter full prod very soon.
I have no idea about the JP50.

 

[Pajda]

Did anybody tested Ampace JP50?

@BatteryMooch and @ZEUS-FL in the link few posts above already tested JP50P1 discharge characteristics, my results will be available this weekend I hope. One of the cycle life tests started yesterday.

 

[TJLNL]

The Jp50p1 that is now sold by nkon looks like it could be a pre-production model as it is lacking a ccc logo. With that being said, quite alot of them are lacking the ccc 'badge' So far the jp50p1 seems to perform right smack in the middle of the pack, like pajda said. Lets hope for an improved cycle life over the competition.
*Forgot the xg50, but that also does not have it.

 

[BlueSwordM]

It's very weird that the SA112 has a very low nominal voltage since it has a similar capacity in terms of mAh/g vs the Molicel/Tenpower M65A.

In fact, the energy content of this cell is quite a bit lower than the M65A with similar weight and while having lower charging and discharging limits.

It's still using an SiCore anode, not SiMaxx, so I wonder why its nominal voltage is rather low.

 

[BatteryMooch]

It's still using an SiCore anode, not SiMaxx, so I wonder why its nominal voltage is rather low.

Could be higher silicon content (raising anode potential) than M65A and/or lower cathode potential.

 

[h1tec]

Could be higher silicon content than M65A and/or lower cathode potential.

I think someone here was talking about higher and lower grade FEB 6000mAh 21700 cells. Maybe the same was done for the 4000mAh cells? Hence Vapcell 'F63' and 'N41' are born, which don't meet their ratings properly, but are SLIGHTLY better than the N40 and F60 which could just be lower grade of the same cell. Although they could've gotten their hands on Lishen 6Ah and Sinowatt 4Ah to get the job done as well.

 

[BatteryMooch]

I think someone here was talking about higher and lower grade FEB 6000mAh 21700 cells. Maybe the same was done for the 4000mAh cells? Hence Vapcell 'F63' and 'N41' are born, which don't meet their ratings properly, but are SLIGHTLY better than the N40 and F60 which could just be lower grade of the same cell. Although they could've gotten their hands on Lishen 6Ah and Sinowatt 4Ah to get the job done as well.

I was thinking the same thing but, for the N40/N41 at least, they are different cells.

 

[BlueSwordM]

So, it seems like some of my flashlights enthusiasts got their hands on their Amprius SA112.

The following capacity measurements are super accurate because the tests are done at 500mA on hobby AIO chargers, but they do provide a frame of reference.

If we add a correction factor of 6% (the Vapcell BL4 tends to overrate cells by 5-6% on average), that would give the Amprius SA112 a capacity of 6750mAh.

I know to wait for proper benchmarks, but this is quite impressive for the SA112, even if it's just done at just 0.076C lmao.

For reference, here's a Vapcell V62 26800 measurement.

 

[BatteryMooch]

I know to wait for proper benchmarks, but this is quite impressive for the SA112, even if it's just done at just 0.076C lmao.

Agreed, looking forward to testing these (mine just landed in the US).

 

[Pajda]

Agreed, looking forward to testing these (mine just landed in the US).

And my samples are also close to delivery.

 

[BlueSwordM]

@Pajda Seems like the nominal voltage is indeed 3.45V for the Amprius SA112, even at just 0.2C :/

 

[Pajda]

@Pajda Seems like the nominal voltage is indeed 3.45V for the Amprius SA112, even at just 0.2C :/

Yes but if the SA112 cell can deliver 6697 mAh at 0.2C rate 100% DoD which gives you 23.16 Wh, or even 6587 mAh @ 22 Wh at 1C-rate* (6A limited by my cycler) one could turn a blind eye to that

 

[BlueSwordM]

@ZEUS-FL Interesting question: based on your Tenpower 50XG observations and testing, would you be comfortable building a large battery pack with it?

 

[BlueSwordM]

I have official confirmation from Tenpower that they are currently in the process of getting the 3C certification with current cells.