Electrical Contact Braid Volume Design for Overcurrent Resistance

The invention uses a composite structure combining a metallic braid with a thermally conductive material (such as aluminum oxide, silicon carbide, or boron nitride) to create an electrical contact that provides both electrical conductivity and thermal management. This composite approach allows the braid to maintain structural integrity and electrical function while the thermally conductive material absorbs and dissipates heat, enabling resistance to high overcurrents without requiring a larger braid cross-section.

The thermally conductive material acts as an intermediary between the braid and the surrounding environment, facilitating heat transfer away from the braid during overcurrent events. This mediator material protects the braid from direct thermal exposure while maintaining the compact dimensions of the electrical contact, thus resolving the contradiction between heat resistance and size.

The invention optimizes the free length parameter of the braid within a specific range (0.5 to 2.0 times the crimped length) to balance mechanical durability and compact dimensions. By carefully controlling this geometric parameter, the design achieves sufficient stress distribution and mechanical durability while maintaining a compact overall length suitable for confined space applications.

The invention introduces controlled flexibility through the braid's construction and the relationship between free length and crimped length, allowing the electrical contact to dynamically accommodate mechanical stresses. The braid can flex and deform elastically during overcurrent events and mechanical stress, dissipating energy without permanent damage, thus improving durability without requiring excessive length.