Re: Another EV bike :)
Posted: Fri Sep 20, 2013 7:48 am
The postman arrived with my first lot of cell spacers. I bought just a few to play with first before taking the plunge.
http://www.flickr.com/photos/28496053@N04/9832511044/
The weight for 12 cells is 580g, working out at about 48.5gm each. I've yet to sort out the cells into capacity groups for mixing together in equal proportions, as well as figure out how to pack the flat cells but I think amethod will become apparent once i start building the larger packs of cylindrical cells.
I like the fact that there is a generous gap between cells... http://www.flickr.com/photos/28496053@N ... otostream/
I also have to grind the tops of the cells to remove the weld pips that were left from the previous pack dismantling, but I don't want to do that just yet and remove any finish to the metal tops before welding, otherwise they could start to oxidise and then when it comes to welding the tabs on things might not go as well as they could.
It looks like 8mm wide nickel tabbing will just fit in the lots across the top, so I'll order a kilo of 8mm x 0.2mm nickel strip and a load more cell spacers. http://www.flickr.com/photos/28496053@N ... otostream/
Chris
http://www.flickr.com/photos/28496053@N04/9832511044/
The weight for 12 cells is 580g, working out at about 48.5gm each. I've yet to sort out the cells into capacity groups for mixing together in equal proportions, as well as figure out how to pack the flat cells but I think amethod will become apparent once i start building the larger packs of cylindrical cells.
I like the fact that there is a generous gap between cells... http://www.flickr.com/photos/28496053@N ... otostream/
I also have to grind the tops of the cells to remove the weld pips that were left from the previous pack dismantling, but I don't want to do that just yet and remove any finish to the metal tops before welding, otherwise they could start to oxidise and then when it comes to welding the tabs on things might not go as well as they could.
It looks like 8mm wide nickel tabbing will just fit in the lots across the top, so I'll order a kilo of 8mm x 0.2mm nickel strip and a load more cell spacers. http://www.flickr.com/photos/28496053@N ... otostream/
Chris