I was thinking of ways of how to answer this question. I think most importantly if your not an adult then make sure you seek adult supervision when making a pack like this as potentially serious fire/smoke damage can be done.Hummina Shadeeba wrote:Are u doing just one strip of .05" for all the connections or is it folded over and how many times? How many amps do u do?
My batteries, magnets, and copper are still sitting here and waiting for the answer to that question..but much more so really waiting to finish the skateboard
With the cavity im still set on potting the battery in...w 50duro silicone.
My main goal is still just on average 500watts of power.. I have a Bafang 500W CST hub motor.. and a S12S 500watt controller.. It can go up to 1000watts on take off though.
The reason I have made a somewhat large battery pack of 7P is because I only like to have to recharge maximum of once per week, mainly because I have no access to power outlets to where I keep my bike.
I currently rebuilt my pack with two layers of the adhesive copper foil. The biggest pain in the arse with using the copper adhesive foil is I had to remove at least some of the adhesive glue on the inside so that it wasn't pointlessly insulting the two layers..
To remove some of the adhesive glue I dipped the copper foil in acetone and then scrapped it off with a coin.. Once submerged in acetone the adhesive glue expands and discolors.. The amount of adhesive they put on the one side of this copper tape has to be seen to be believed once its dipped in acetone. I scraped off all of the middle adheasive and left the sides in tacted so I can still fold the second layer over and have some stick. For just one 2S7P link I decided to use the ebay "Copper Sheet 0.05 x 100 x 1000 mm" that I ordered, cut to size, the massive upside to this is there is no adhesive but its still thicker..
http://www.ebay.com/itm/181443383724?_t ... EBIDX%3AIT
It feels way more 'springy/less contouring' against the postitive terminals as at least for Samsung 29E cells the positive side sits a bit inward from the round top edges of the 18650 cell.
I was thinking that for most folks who build their packs they draw enough current that the links get very hot to the point of BBQing.. So I was thinking that if your going to be drawing a large amount of power that creates a lot of heat then theres no real point of building a nib pack as your going to be putting your cells through the same or more amount of heat over time then just using them in the first place.
In other words if your going to draw heavy amounts of power out of them you may as well just use a soldering iron and solder your cells together as theres not going to be any difference in the heat they endure in the first place.
https://endless-sphere.com/forums/viewt ... 5#p1234810
https://endless-sphere.com/forums/viewt ... 5#p1236850
So in that case you might consider building a pack soldered together like this guy did.
https://endless-sphere.com/forums/viewt ... 19#p988212