Pure nickel strips (updated)

rexgoodwin

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I would like to use fuse wires in my battery pack but I hate the idea of soldering directly onto the cells so is there some sort of combination between using nickel strips and fuse wire?
 
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floydR

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Fuse wire can be spot welded, or the nickel strip can have the fuse wire soldered to it and the nickel strip spot welded to the cell.
Later floyd
 

rexgoodwin

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Fuse wire can be spot welded, or the nickel strip can have the fuse wire soldered to it and the nickel strip spot welded to the cell.
Later floyd
I watched a video earlier on spot welding fuse wires and I think that is the route I want to take but then I wonder why don't people do this over soldering onto the cells? It seems like a good idea if you want to keep your cells lifecycle intact

Is there a video out there where someone uses both fuse wires and nickel strips? I also like this method but I think if one of the cells short circuits even if the fuse wires melt the nickel strip connection is still there and will affect the other cells in that parallel group right? Sorry I am not a professional

Note: this is all theory work (everything I post) because the pandemic lockdown made it impossible for us to build the electric vehicles for our project..so the practical work was cancelled and moved everything to theory and simulations using softwares sadly :(
 

floydR

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No need to be sorry the closest I came to batteries before 5 years ago was changing them in car/truck,laptops,radios etc. Could you link the video you refer to above? i saw a video think it was one of lithuimsolar's where he spot welds a 3 cell parallel block then uses fuse wire i am not sure if he spot welded th fuse wire or soldered it. 3 cells would be taken out of the battery if one fuse were to burn. The nickel strip and fuse wire makes sense for huge packs think his were 300p.

Later floyd
 

rexgoodwin

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No need to be sorry the closest I came to batteries before 5 years ago was changing them in car/truck,laptops,radios etc. Could you link the video you refer to above? i saw a video think it was one of lithuimsolar's where he spot welds a 3 cell parallel block then uses fuse wire i am not sure if he spot welded th fuse wire or soldered it. 3 cells would be taken out of the battery if one fuse were to burn. The nickel strip and fuse wire makes sense for huge packs think his were 300p.

Later floyd
here is the video:
 

floydR

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Is this the one you were looking for
. the one you posted was a 80 cell pack made with justcopper bus bars and spotwelded fuse wire each cell has a fuse the fuse wire is welded to thecells and soldered to the bus bar.
Using nickel strips with a fuse wire as shown in the video I posted is great and note than when a fuse wire burns it there is no longer a connection to the bus bar. I thought lithiumsolar spot welded the fuse wire but he soldered them which is ok because you can solder away from the cells.
Later floyd
 

rexgoodwin

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yes something like that. i watched the video and made me want to sketch a quick design for how i can connect mine using both nickel strips, bus bars and fuse wires (see attached image). so in the attached image, the dark-grey wire is the nickel strips, i decided to connect 2 parallel cells per nickel strip and use the last 3 cells together, i could use 3 cells per strip but i thought the fewer number of cells per strip is ideal. the red wire is the fuse wire forming the series connection. this is only for the top view, i will do the same for the bottom as well. hope it looks good :)
 

floydR

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Fuse wire isn't typically used for series connection s as it has to be able to handle the current thereby it no longer preforms as a fuse wire.
Later floyd
 

rexgoodwin

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Fuse wire isn't typically used for series connection s as it has to be able to handle the current thereby it no longer preforms as a fuse wire.
Later floyd
oh i meant how they connect 2 parallel groups to each other by a busbar using fuse wires
 

floydR

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In your drawing they were<the drawing has disappeared> being used as the series connection. You can upload images directly to this server
the red wire is the fuse wire forming the series connection. this is only for the top view, i will do the same for the bottom as well. hope it looks good :)
Fuse wire can't be the series connection. The parallel Groups are either positive or negative. . This video shows a 14s pack that is the only difference yours is 10s iirc
later floyd
 
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