A method and system for evaluating specific parts of electric vehicle components by simultaneously applying 3D vibrations, cycling electric current, and optional temperature variation to detect mechanical, thermal, electrical, and insulation irregularities.

Patentradars sammanfattning

The invention provides a targeted evaluation method for electric vehicle components (inverters, converters, control units, motor drives) by fastening the component to a vibration table applying 3D vibrations (8–2000 Hz, 5–30 g) while simultaneously cycling a high electric current (0–600/1000 A) through a chosen internal part such as a busbar connection or fastening arrangement. The cyclic current induces localized resistive heating and cooling, creating thermal stress precisely at the part under test rather than the whole component. An evaluation entity monitors resistance, short-circuit behavior, temperature, and mechanical responses to detect cracks, loose fasteners, insulation failures, and electrical degradation. An optional surrounding temperature cycle (−50 °C to +120 °C) synchronized with the current cycle amplifies the thermal swing rate and improves detection sensitivity.

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