TERMINAL ASSEMBLY FOR A SECONDARY CELL

Patentradars sammanfattning

Northvolt's terminal assembly comprises a hollow metallic shaft that passes axially through a casing opening, with its first end welded to—or integrally forming—a current collector inside the cell, while a separate cap is welded to the second end to close and hermetically seal the axial through-hole. The hollow shaft may be riveted to form internal and external flanges that compress a gasket against both corners of the casing opening, achieving a controlled, asymmetric seal (1.5–2.5× greater compression internally). An optional solid shaft insertable into the through-hole improves thermal mass and heat dissipation during resistance or laser welding of the cap. The multi-part architecture decouples shaft and cap material/dimension choices, permits laser-beam passage through the bore for internal welding, and allows electrolyte filling through the same conduit, eliminating separate fill ports.

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