Cycle life tests of High Energy density cylindrical cells

Small update

Update:
- updated 5300mAh+ charts 100% DoD

Unfortunately, I still can't get any more samples in the "58E" category. Typically, EVE 58Es are still not in mass production according to the information available to me, and a zillion amount to be ordered from BAK.
 
Small update

Update:
- updated 5300mAh+ charts 100% and 90% DoD
- added BAK N21700CD-53E to the charts. I have noticed that this is the second revision of this model, (the first revision was without E) so let's hope for better results. In charts it is listed with a bad marking without E, it will be corrected in the next update.
- I have temporarily removed the results for the 5000 mAh category 21700, which I will sort and bring them back in time.
- Samsung 50S2 sampes arrived so tests will start soon
 
Small update

Update:
- added Table data for BAK 53E
- added 1C @ 100% DoD discharge voltage chart for 5300+ category (in the second post)
- Samsung 50S2 start 0.5C-4C cycling 100% DoD (4C-rate is chosen here for two reasons, first is the limitation of my NEWARE tester to 20A and the second is that for Samsung 50S the end temperature at 20A is around 72°C with 20°C Room Temperature, so the 50S is not able to run 5C continuous discharge without forced cooling)
 
I found a shop Upgrade Energy Batteries - Elite Performance where it seems you can get Amprius SA10 cells (4Ah @ 14.4Wh in 18650 format) only you have to disassemble them from the pack. They have also other Amprius cells in pouch format. You can also download Amprius and Molicel P50B datasheets from here: Datasheets | Upgrade Energy

After looking at the datasheet for the SA10, I am not sure if I need to order this cell :unsure: , because the cycle life is already measured here (for which Amprius deserves a thumbs up, because it is not very good). Also there should be a SA17 cell (6Ah @ 21.6Wh in 21700 format) but not available here.
 
@BlueSwordM I think it's a great idea to test some of the best of the best of the best LFP competitor in the HE category. The question is only where to get samples of this particular Lishen LR2170EH model?

And I'd quite like to torture that HP NMC guy from Lishen with 5C charging (still limited to 20A for now). Very soon I'll have up to 3 channels free again (BAK 45D and EVE 40PL going into the final 1000cycles). Recently I thought to test the Molicel P50B at 4C charging, when it did 3C with ease. It was more a question of whether to set up a 4C charging and stay with the 3C discharge, to check the charging capability only, or to test with 4C-4C cycle.
 
Pajda said:
@BlueSwordM I think it's a great idea to test some of the best of the best of the best LFP competitor in the HE category. The question is only where to get samples of this particular Lishen LR2170EH model?

And I'd quite like to torture that HP NMC guy from Lishen with 5C charging (still limited to 20A for now). Very soon I'll have up to 3 channels free again (BAK 45D and EVE 40PL going into the final 1000cycles). Recently I thought to test the Molicel P50B at 4C charging, when it did 3C with ease. It was more a question of whether to set up a 4C charging and stay with the 3C discharge, to check the charging capability only, or to test with 4C-4C cycle.
Click to expand...
On the topic of the 21700 LFP cell, I sent an email to Lishen to know about their distributors.
Otherwise, I'll have to check if it's available on my Alibaba distributors.

Worst case scenario, I ask one of my Chinese friends to get one of those cells for me :p
 
Wow.. that would put another ~5ah into a 20ah pack with 5ah cells.
 
Pajda said:
Back to @BlueSwordM idea to test some HE LFP samples. I recently ordered JGNE 18650 2200mAh samples from Nkon, which should have an even higher VED of 420 Wh/l than the Lishen LR2170EH ones with 386 Wh/l.
Click to expand...
2200mAh? That is a nice amount of energy for an LFP 18650.

A 21700 class version of this cell for budget ebike builds would be wonderful to create 150$/kWh finished packs.
 
Kumyang has licenced StoreDot's technology and they have listed some curious new cells on their website:
  • 7.0Ah (325 Wh/kg)
  • 6.7Ah (320 Wh/kg)
  • 6.0Ah (316 Wh/kg)
  • 5.6Ah (301 Wh/kg, and apparently ready for production)
And a couple power variants:
  • 5.5Ah: 295Wh/kg
  • 5.0Ah: 268Wh/kg (two variants mentioned, 50P/50P3)
1743877568630.png


There's also some information about the 46-series form factor (with claims up to 320Wh/kg):
1743877715086.png
 
Last edited:
You must log in or register to reply here.

Similar threads

P
    • Like
Molicel P50B variable charge-rate cycle life test
Replies
7
Views
566
Pajda
P
P
    • Like
    • Doin' Science
  • Sticky
Tabless design cylindrical cells tests
11 12 13 14 15
Replies
359
Views
49,219
BatteryMooch
BatteryMooch
P
    • Like
Cycle life tests of High Power density cylindrical cells
2 3 4 5
Replies
123
Views
30,041
yantra yatra
Y
P
    • Like
Calendar ageing tests of mixed cylindrical cells
Replies
13
Views
3,825
Pajda
P
P
    • Like
Cycle life tests of mixed-technology cells
Replies
8
Views
2,025
Pajda
P
Back
Top