agniusm
1 MW
Which cell would be most powerful to get, no matter capacity? Would US18650VTC5A be best of the best regarding power output?
“…Its temperature of 78°C at 40A continuous is the average for cells being operated at their rating so I am rating this cell at 40A…”
They also stated that the cell could provide a few seconds of a 60A burst. Not bad for a single 3.0-Ah cell
spinningmagnets said:
agniusm said:Yeah, that one isn't bad at all Maybe later. Now i need something to push my 6P module to the limit.
spinningmagnets said:I was sent a link to a vape forum that claims the 2100-mAh VTC4 produces more amps than VTC5, and the 1500-mAh LG HB6 is the highest amp 18650 cell.
https://endless-sphere.com/forums/download/file.php?id=175461&mode=view
redilast said:Not sure why people are posting data about VTC5. No one here is recommending that. VTC5A is a different cell with different specs.
spinningmagnets said:I think the Sony Konion VTC5 is probably the most powerful 18650.
cwah said:They have vtc6 now:
https://eu.nkon.nl/sony-us18650vtc6.html
However, if i remember correctly, all high discharge cell have pretty poor lifecycle. Usually 300 cycle to 80%.
You may as well get hk graphene
agniusm said:Basically yes. My bus bars are .6mm and I would like to see when they start to be a bottleneck. So far they heated up to 40C when cells were at 75C at 120A and I think its from the cells them selves. Its impressive as is but I need to find the upper limit just out of curiosity.
Matador said:I can't find the VTC5A datasheet... Where does that 35A rating comes from.... I would like to see some discharge curves.
redilast said:Matador said:I can't find the VTC5A datasheet... Where does that 35A rating comes from.... I would like to see some discharge curves.
Main datasheet: http://www.produktinfo.conrad.com/datenblaetter/1400000-1499999/001499575-da-01-en-SONY_LI_ION_AKKU_18650__2600MAH_35A.pdf
Some others....
http://www.accushop.at/images/products_images/apdf/Sony_US18650VTC5A.pdf
https://www.imrbatteries.com/content/sony_us18650vtc5a.pdf
litespeed said:My next super high powered pack I want to build another VTC pack. Right now I'm using the VTC3's I got from Dr Base and it performs well pushing 200 amps on a 20s15p but I get voltage sag pretty good. I want to go 30 amp hour on the next pack for more range less cell stress, I get over 50 miles now and 25% hot ridding and 75% bicycle speeds mostly peddling. So my choices on the new pack are a 20s15 of VTC4's, 20s12p of VTC5 or 5A or 20s10p of VTC6 cells.
Pricing is not drasticly different since the amount of cells drops and the cost goes up. Weight goes down as prices go up!
All prices in euro, (to lazy to convert!)
VTC4 20s15p 450 amp peak 627 +70 to ship
VTC5 20s12p 360 amp peak. 672 +60 to ship
VTC5A 20s12p 420 amp peak. 768 +60 to ship
VTC6 20s10p 300 amp peak. 750 +50 to ship
My bike has a Q205 3.5T and loves to suck amps (peaks at just about 200 amps) so I'm leaning toward the 5 or 5A to lower the weight some and still have 160 to 220 extra peak amps that I won't even be touching for future requirements......
Thoughts?
Tom
litespeed said:When pulling 196 amps the pack drops to the mid 70's on a fresh charge. I did have a bad sagging cell which I replaced so it may do better now. I did not cycle all of mine separately due to not having the proper equipment. I cycled the whole packs and pulled the bad ones. I bought 50 packs back in late 14 and built a 24s15p pack but changed it to 20s15p when I went MaxE.
Tom
So 9volts drop for 196A.litespeed said:No....I have a 20s15p 84 volt hot off the charger pack! When I originally built it was 24s15p. I have about 7 to 10 volts of voltage sag.
Tom