elkooo
Member
- Joined
- Aug 9, 2019
- Messages
- 32
Hi all,
SO...
I have built myself a spotwelder out of a golf-cart-relay (500A) an old car battery and an arduino (which over a mosfet times the closing of the relay very precisely) . So far I have great success welding nickel-strips . This works now nearly every time (except for when the cell is really dirty ormessy or not cleaned the old weld-bumps --> notflat... :angel: :dodgy: ).
Now I am aiming for the next step:
Welding fuses :exclamation: . For my project (probbably gonna be a 14s32p for starters) I want all cells individually fused. But if not strictly necessary,I 'd prefer notto solder directlyon to the cells. I'd rather prefer welding since it is convenient, fast, and nearly free of fumes and nearly doesn't heat up the cell at all if well configured.
I did some first tests with resistor / diode legs/leads (as they are similar to the glass-fuses I ordered... still waiting for those).
It was a fatal fail. It is on one hand nearly impossible to get the electrode tip to rest on the cell and on the other hand was the current to weak for the resistor wire to be welded. My welder had only one setup (hard-coded to the arduino) so I will implement an adjustment potentiometer next... but one other idea got to my mind which I would like to test:
I thought on tapping the connector wires of the resistors (respectively fuses)with a hammer to flatten them out. This leads to making the wirethinner/sheet-likeand give a larger area to position the electrodes on. I didn't test it yet but as soon as I have results, I will post images of the process and results.
Cheers, elkooo
SO...
I have built myself a spotwelder out of a golf-cart-relay (500A) an old car battery and an arduino (which over a mosfet times the closing of the relay very precisely) . So far I have great success welding nickel-strips . This works now nearly every time (except for when the cell is really dirty ormessy or not cleaned the old weld-bumps --> notflat... :angel: :dodgy: ).
Now I am aiming for the next step:
Welding fuses :exclamation: . For my project (probbably gonna be a 14s32p for starters) I want all cells individually fused. But if not strictly necessary,I 'd prefer notto solder directlyon to the cells. I'd rather prefer welding since it is convenient, fast, and nearly free of fumes and nearly doesn't heat up the cell at all if well configured.
I did some first tests with resistor / diode legs/leads (as they are similar to the glass-fuses I ordered... still waiting for those).
It was a fatal fail. It is on one hand nearly impossible to get the electrode tip to rest on the cell and on the other hand was the current to weak for the resistor wire to be welded. My welder had only one setup (hard-coded to the arduino) so I will implement an adjustment potentiometer next... but one other idea got to my mind which I would like to test:
I thought on tapping the connector wires of the resistors (respectively fuses)with a hammer to flatten them out. This leads to making the wirethinner/sheet-likeand give a larger area to position the electrodes on. I didn't test it yet but as soon as I have results, I will post images of the process and results.
Cheers, elkooo