Maybe they are not in stock in your part of the world, but here they are in stock here.
I did no shopping .. . just searched for what I know worked 1000 years ago as a "starting point"
(Ebike is like RC... information usually goes bad quickly... so I do not know what is currently "best")
Glad to hear you are going down the can route. Please find a way that does not suck and share with us how it works. I have taken apart many batteries made of cans. In nearly all cases it is a real file to fit situation - cardboard and glue and welded little tabs... nothing even remotely rebuildable in any way.
The Ability to REBUILD is #1 for the revolution!
(hence why I am even here...)
... In front of me is a rare example of a non-sucking 18650 implementation
A light weight aluminum housing machined to a specification that is dependent on the spring loading of the pogo's used.
(Yes, those are the cells I use. I paid $7 each but have in the past paid $15. They are just rebranded... you pay for convenience)
The spring loaded heavy gold button is rated for at least 9A continuous and they press VERY HARD... hard enough to dent the bottom of one cell when I did a 5' drop test of the mated assembly
(Cells stayed in)
I am running those two cells at 177W while in 2S
177W / 2*3.6 = 24.6A
BURST (We really only deal in Burst in EV... thinking otherwise is silly... BURST and AVERAGE)
At the bottom is a fixed post, also bulged out.
I... do not suspect that the 18650 cans with the built in BMS puck would fit into this assembly. It is a very tight fit! For an ebike it would absolutely suffice. I have dropped this assembly 20+ times and never had the cells flop out. Zero Chance of anything but the GNARLIEST of vibration (at perfect resonant frequency) causing a no-contact. Even right on the resonant frequency these cells would conduct at full rate in this assembly.
...
Since you did bow (my son and I bow before we fight - no bow, no fight... I take it seriously) ...
I will share with you what the Master said when I went to his shop many years ago. ... ... ... He showed me something very similar. His was protected by patent but the idea was the same...
MAKE IT SO THAT YOU CAN SWAP OUT THE CELLS
... so if you are on that path, you are on the right path.
The only thing I would add is to bypass the whole Global BMS and run per-cell BMS
[/quote]
(See how we are shifting away from fussy this and fussy that to global win idea? This is my job)
-methods
mati said:
methods said:
....
The lipo that you did link, the item is no longer available .....
....
I will have the Anderson PP45 and 10AWG wire in my mind when time get to the wiring.