Cycle life tests of High Energy density cylindrical cells
- Thread starter Pajda
- Start date
Have you seen the news from EVE, some really interesting cells:
I mean the 100A claim is crazy, and these 5800mah ones also look very good if true.
EVE Releases the 21700 40PL Tabless Cell and 21700 58E High Capacity Energy Cell-News-EVE
News
www.evebattery.com
I mean the 100A claim is crazy, and these 5800mah ones also look very good if true.
Pajda
10 kW
Small update in N38+F40 post. I have added some new informations in the Table. Added temperatures measured without forced air (I just turn off the thermal chamber after conditioning the cells to 25°C, so it acts as isolated box with 100l volume of air. There could be further confusion here 
, as modern best HE cells handle 3C continuous discharges just fine. No they don't.
Also added results of EVE INR18650 35V which seems to be also a decent cell. Cycle life tests started today.
After switching to the new version of the ES forum, I noticed a limit of 10 images per post. Unfortunately this now restricts me enough to move or add the new results to the first posts of the thread
, as modern best HE cells handle 3C continuous discharges just fine. No they don't.Also added results of EVE INR18650 35V which seems to be also a decent cell. Cycle life tests started today.
After switching to the new version of the ES forum, I noticed a limit of 10 images per post. Unfortunately this now restricts me enough to move or add the new results to the first posts of the thread
Last edited:
Pajda
10 kW
small update:
Managed to get the image per post limit back from 10 to 20, so I was able to do some editing in the first 4 posts of this thread. The basic idea is to make the data display clearer. So I tried these modifications:
- data are now categorised by format (18650 and 21700 data in separate graphs)
- removed nominal capacity "dots" after each 50 cycle from the graphs.
- capacity (vertical) axis now have different scale! (18650 ends at 4Ah, 21700 ends at 6Ah)
News:
added more results from 100% DoD cycling (this test settings will also get its own table in near future)
Vapcell N36 and F36 will be added soon
Managed to get the image per post limit back from 10 to 20, so I was able to do some editing in the first 4 posts of this thread. The basic idea is to make the data display clearer. So I tried these modifications:
- data are now categorised by format (18650 and 21700 data in separate graphs)
- removed nominal capacity "dots" after each 50 cycle from the graphs.
- capacity (vertical) axis now have different scale! (18650 ends at 4Ah, 21700 ends at 6Ah)
News:
added more results from 100% DoD cycling (this test settings will also get its own table in near future)
Vapcell N36 and F36 will be added soon
Pajda
10 kW
small update:
more cycles with Vapcell 18650 cells, but more interesting news, Vapcell recently announced a 21700 F60 cell with 6000 mAh. Samples are already on their way to me.
more cycles with Vapcell 18650 cells, but more interesting news, Vapcell recently announced a 21700 F60 cell with 6000 mAh. Samples are already on their way to me.
small update:
more cycles with Vapcell 18650 cells, but more interesting news, Vapcell recently announced a 21700 F60 cell with 6000 mAh. Samples are already on their way to me.
Yo, would you test the new Murata VX40 cell? 4ah, tabless and 60-80A approx
Pajda
10 kW
I didn't even know Sony had something like that. If it's available somewhere, it's no big problem to add it to the tests
Currently not easy to get, easiest way is to buy a Makita BL4040F (F is important) pack and extract cells, it has 10 of them. That is it for now but I hope it will soon be available on the free market.
