Passed test!
Charged to 4.2v 150mah cutoff
Discharged to 2.5v at constant 10A
Capacity at 10A discharge rate 2.885Ah
Max temp 57.4°C
https://lygte-info.dk/review/batteries2012/Samsung%20INR18650-30Q%203000mAh%20(Pink)%20UK.html
2 Likes
This is 7s28p configuration?
Depending of soldering , it can be 2x 7s14p , but in the case I will switch the first 7rows to get the wires shorter if plug in series after …
Other wise this would be really really heavy battery if 14s is needed with 2 of them 
It will be two 7s14p groups.
That way I can balance charge them with commonly available 8s hobby chargers. They will be wired in series to power the e-foil board as one 14s14p battery.
Stay tuned. More updates to follow.
4 Likes
Happy owner since today.
Thanks to Jan for using his Spotwelder. Now need to build a nice enclosure.
2 Likes
Looking good! What are you planning for an enclosure? What is this? 12s15p? You gonna do a BMS?
12s15p…
Why not 12a16p??? 
Nice job. I hope you have a good solution for the terminal wires?
Yes 12/15. I planned to make a nice housing from HPL Board. But just figured out that it will not fit with housing. Collision wit the front latch of my lid:scream:
So for now it will be only shrinking
Terminal wires are 8mm2. With 150A connectors
1 Like
Sucks when you build I and I doesn’t fit. Hopefully you can find a solution. Are you planning on a BMS?
I’m on the process of building 2 VTC6 packs, had the cells from Nkon but I still waiting to receive the stupid Lipo to power up my Arduino spot welder…
I’m facing the same drama: 2x 6s 14p can barely fit my housing if gluing the cells alternated with no plastic spacers, I when hot gluing rows of14 cell I kept a minimum clearance cell to cell, the glue help. The problem is that I can’t fit the spacers.
30A rated cell in 14p setup gives me some peace of mind, I always fuse my efoil with 90-100A max, right after the batteries, Tesla system looks good but I don’t want to touch cells with a solder iron. I do solder and I’m not so convinced that you could do an hot solder in less than 3 seconds on a 18650, and if so, it wants a very hot iron and lots of solder…
You can spot weld fuse wire. But it is difficult to do until you master the technique. I have no experience with spot-welding.
Which size/type/gauge of wire do you suggest for 10-15A? VTC6 are rated up to 30A, so at least 10A fuse is necessary (140A max current at 14s)
Search for spot weld fuse wire on YouTube. A number of videos showing how to do it.
2 Likes
PLEASE USE SAFTY GALSSES WHILE WELDING! I recommend to have a bag of sand, li-ion cells doesn’t require oxygen to ignite or create enough heat to ignite sounding material
I had a couple of short cut with 18650 , the cell will heat up very fast and de-gas through the top ( between the + and the - ring ) always add time to take it away , no fire so far …
With time fuse will become weaker and weaker , 20awg is used on eSkate …
Read the manufacter spec , short cut cell discharge around 150-200A
Here is the 30q safety test
Not found the vtc6
But the 30q gives 138A , so I guess fuse should blow before but not too fin to keep good contact, 30awg looks to weak to me
I do not understand why you want to use the fuse on every cell. This is a bottle neck for your current. I do not know about Sony, but I assume they have same safety standard as Samsung. Even a shortcut of the cell will not resume in any fire or explosion. The cell will heat up to something between 60 and 100C and then it is dead.