Has anyone tried out these lipo’s? http://www.hobbyking.com/hobbyking/store/_18560__Turnigy_5000mAh_1S_20C_Lipoly_Single_Cell.html
u could but at that point it makes more sense to build a 18650 or 26650 pack
You are probably right. I have only been using pre-build lipo’s… I just think that these lipo’s is VERY cheap and also very slim so you have the opportunity to make a ultra slim board.
Do you think it is possible to build a 18650 battery pack around the same price?
no but now i want to. with the right bms and a single drive system with only one vesc you could bury 12 of these directly in a 9ply deck along with all the electronics. add some hub motors and its total stealth.
Hey @longhairedboy when you bury these cells in a deck, taking out material means the board is more flexible, is that a concern? and how much can you safely take (depth)? thanks
on a 9-ply deck i would say 2-ply and it depends how much surface area is shaved, but if its not your whole deck flex should be really low or non-existent
i could cut pretty damn deep if i cover the whole thing back over in cf twill. I could for instance bury the cells all the way into the deck and CF over them, then just worry about making a tiny removable cover for the vesc compartment which may also house the bms and receiver. then cover the top in CF too for added strength.
it would suck if one of the cells went dead though.
thats why i would reccomend a nice 26650 lifepo4 pack
totally… better off with nice expensive high cycle cells if you’re locking them in forever.
plus the probelem with a 18650 pack is u have to use more and more cells to get the power but increase ur chances of a short, and decrease the life cycle of your li ions. Lifepo4 however is a relatively safe chemistry. Will last 1-2 years on average and during those years will still hold a good charge and provide good power. Also u only need 1 or 2p with the 26650s
Lipo all the way for me. although I found its cheaper to pull apart a pack and re assemble it than buy individual cells.
I don’t know how complicated it is to cover a board with carbon fiber. I am thinking that fiber glass is easier? I might be wrong though… Fiber glass adds a lot of strength to the board though (again, I don’t know if fiber glass adds more strength…)!
@OskarCastrone Its not complicated to cover a board with carbon fiber. Fiberglass and Carbon Fiber each have their advantages. They can be applied to your deck in much the same way. Generally speaking, fiberglass is cheap and allows considerable flex (when compared to carbon fiber) and if you put a couple of layers of 'glass over your deck it will stiffen it, but it will allow flex (e.g. like with snowboards and skis). Carbon fiber is much lighter but more expensive and if you put it on your deck, it wont allow much flex at all. If you bend carbon fiber like you would to fiberglass, it is likely to snap or shatter.
The big drawback with carbon fiber is if you want the weave to look pretty, and to take advantage of carbon fiber’s physical properties, there is usually a lot of prep work and careful sanding required. If you want to do this well, you’ll need to do some research into the accessories for applying carbon fiber.
I suggest you do a forum search for “carbon fiber”. There are few threads I’m sure you’d would be interested in reading.
Now, lets get this thread back to back to Soldering cells
What type of nickel strip do u normaly use, Nickel plated or pure nickel strips?
pure nickel, higher amp rating. dont want your board bursting in to flames going up a hill.
it makes sense! is hard to find the pure nickel, do u have a reliable online store?
I used 400°C soldering Iron and copper braid. Sanded cells before soldering and had really no issues. 3-4 sec per cell is fine some took a bit longer but they weren’t too warm at the end when iI touched them. 10S6P NCR GA is now waiting to power something
well not sure if this is pure nickel, it says nickel steel…not too sure if is the right thing… http://www.ebay.com/itm/311532646723?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
nope thats nickel plated steel
Copied off of ES spot welding repository: Where should I get nickel strips?
Nickel strips: (~100 meters (1Kg)) http://aliexpress.com/store/product/Free-Shipping-0-15-7-mm-pure-nickel-plate-for-battery-welding/610392_32261769234.html
Nickel strips: (~100 meters (1Kg)(tested)) http://aliexpress.com/item/FREE-SHIPPING-High-Quality-Pure-Nickel-Plate-Strap-Strip-Sheets-99-96-for-battery-spot/2054948107.html