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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 / 12–13 mOm, in heat shrink with insulating ring
Battery CellsOrigin: disassembled Tesla batteries
Form factor: 21700
Capacity: 4.4–4.6 Ah
Internal resistance: 12–13 mOm
Insulation: new heat-shrink wrap + insulating ring on the positive terminal
Quality control: 100% of cells tested and sorted by capacity and internal resistance
Service: laser welding of aluminum–nickel bimetallic contact pads for soldering and spot welding — UAH 20 per cell
124 in stock
Description
21700 cells from disassembled Tesla batteries. Each cell comes in new heat-shrink wrap with an insulating ring on the positive terminal, ready for assembly. 100% of cells are tested and sorted: this group has a capacity of 4.4–4.6 Ah and an internal resistance of 12–13 mOm. Use cells from the same group in one battery pack — that way the cells work evenly and charge equally. The lower the internal resistance, the better a cell handles current and the less it heats up. For a pack built from identical cells, the difference between neighboring resistance groups is small — what matters is that all cells in the pack come from the same group. For convenience, we can laser-weld aluminum–nickel bimetallic contact pads onto the cells. Such a pad makes it easy to solder a wire to it and spot-weld a nickel strip. The service costs UAH 20 per cell.
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