Addy
100 W
On the other hand, if you clamp too hard you can dent the cell. I have dented some cells when pressing too hard with a spot welder, specifically on the positive side of the cell.
Anyone know what threads being referenced here?zzoing said:thanks to the genius discussions on this forum in about 2014
john61ct said:The clamping force needs to not be via a low-area "point", but spread over a flat contact area in order to lower the pressure psi.
Better electrically too, more surface area for lower resistance higher conductivity.
There are conductive epoxies as well, the physical cell-holding force does not need to be exerted by the electrical connection.
Sorry, don't follow.liveforphysics said:If you have a limited amount of contact pressure, you will find a point pretty fast where more surface area hurts the joint.john61ct said:The clamping force needs to not be via a low-area "point", but spread over a flat contact area in order to lower the pressure psi.
Better electrically too, more surface area for lower resistance higher conductivity.
zzoing wrote: thanks to the genius discussions on this forum in about 2014
Anyone know what threads being referenced here?
Wow can't ask for better curation than that, sure beats sorting through hundreds of google resultsspinningmagnets said:zzoing wrote: thanks to the genius discussions on this forum in about 2014
Anyone know what threads being referenced here?
No Solder / No Weld
"Another No Solder/Weld 18650 Build" (snath, 6 pages [plus more links to other no-solder/no-weld builds])]
zzoing said:Silver would get very worn out for an electrical contact. In the industry they have fairly precise micron widths and alloys for the best plating there are probably ASTM grades that you can have if you invest in equipment for it. Nickel micron astm search gives this page https://advancedplatingtech.com/electrolytic-plating/nickel-plating-electrolytic-services/
Very well clarified, thanks again.spinningmagnets said:If the contacts are also made from a very stiff material, microscopic irregularities means that there will be more pressure applied in one area, and less in another
liveforphysics said:This is why solderless packs aren't a mechanical design problem to solve as much as a materials tech challenge to select things that won't let force creep down to nothing after sitting a while.
BlueSwordM said:What do you mean current capability is too low?
That's why I've made my own BeCu spring design
Nickel plated BeCu C17530 springs.
In a dual spring setup, they are absolute monsters, and have no problem handling 20A+ currents.
I don't see a thread talking about this, just their cells.amberwolf said:EIG's bolt-together system on their OEM batteries seems to work fine. I've been using them for years on CrazyBike2 and SB Cruiser, with DIY interconnect bars since I didn't have the OEM ones.
BlueSwordM said:Also, this is quite the lengthy spring.
By making it shorter, I can easily lower the resistance of the spring.
@Matador, did you mean 100C or 1000C? Because nothing is going to resist that much heat at 1000C
john61ct said:I don't see a thread talking about this, just their cells.amberwolf said:EIG's bolt-together system on their OEM batteries seems to work fine. I've been using them for years on CrazyBike2 and SB Cruiser, with DIY interconnect bars since I didn't have the OEM ones.
Have you got a link to the weldless construction of their packs?