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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
158₴
21700 Tesla Battery Cell (salvaged) 4.6–4.8 Ah / >15 mOm, in heat shrink with insulating ring
Battery CellsOrigin: disassembled Tesla batteries
Form factor: 21700
Capacity: 4.6–4.8 Ah
Internal resistance: >15 mOhm
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 bimetallic aluminum–nickel contact pads for soldering and spot welding — UAH 20 per cell
148 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 4.6–4.8 Ah and an internal resistance of >15 mOhm. Use cells from the same group in one battery pack so the cells work evenly and charge uniformly. 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 adjacent resistance groups is small; what matters 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. Wires are easy to solder to such a pad, and nickel strip can be spot-welded to it. The service costs UAH 20 per cell.
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