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Welding Al–Ni Bimetallic Contact Pads onto a 21700 Cell (Laser Welding)What we do: laser-weld a bimetallic aluminum–nickel pad onto the cell…20₴+ у кошик
135₴
21700 Tesla Battery Cell (salvaged) 4.4–4.6 Ah / >15 mOm, in heat shrink with insulating ring
Battery CellsOrigin: disassembled Tesla batteries
Form factor: 21700
Capacity: 4.4–4.6 Ah
Internal resistance: >15 mOm
Insulation: new heat shrink + insulating ring on the positive terminal
Quality control: 100% of cells tested and sorted by capacity and internal resistance
Service: laser welding of bimetallic aluminum–nickel contact pads for soldering and spot welding — UAH 20 per cell
500 in stock
Description
21700 cells from disassembled Tesla batteries. Each cell has new heat shrink with an insulating ring on the positive terminal and is ready for assembly. 100% of cells are tested and sorted: this group has a capacity of 4.4–4.6 Ah and internal resistance of >15 mOm. Use cells from the same group in one pack so the cells work evenly and charge equally. The lower the internal resistance, the better the cell handles current and the less it heats up. For a pack made of identical cells, the difference between adjacent resistance groups is small. What matters most is that all cells in the pack come from the same group. For convenience, we can laser-weld bimetallic aluminum–nickel contact pads onto the cells. Such a pad makes it easy to solder a wire or spot-weld a nickel strip. The service costs UAH 20 per cell.
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