2results about How to "Shorten the current path" patented technology

The application discloses a battery and a manufacturing method thereof, and the battery comprises a positive current collector layer, which is a composite structure with dense normal layers and porous functional layers alternately distributed formed on an aluminum foil substrate through electric field assisted selective etching, a positive electrode sheet coated with positive active material aluminum powder and subjected to formation treatment, and a top cover assembly and a bottom cover assembly connected with the positive and negative electrodes through full-tab cross-section laser welding and full-tab end face laser welding respectively; the manufacturing method comprises the steps of preparing a composite positive current collector layer, coating active material, assembling a battery cell, laser welding and packaging, etc. The specific surface area and ion transmission efficiency are greatly improved through the composite current collector layer structure, the internal resistance and temperature rise are reduced by combining the optimized full-tab welding process, so that the rate performance, cycle stability and thermal safety of the battery are significantly improved, and the battery is suitable for the manufacturing of high-power long-life batteries such as electric vehicles and energy storage systems.

The utility model discloses a kind of power module based on silicon carbide device, including main power plate, silicon carbide chip and radiator, radiator is annular, and the outer edge surface of radiator is polygonal, the outer edge surface of each radiator is attached with silicon carbide chip, the inner edge surface of radiator is provided with the fin of fish fin shape, radiator is attached on main power plate.The utility model discloses a kind of power module based on silicon carbide device, using main power plate and coaxial circle design of drive board, radiator is attached on main power plate, and silicon carbide chip is attached on the outer edge surface of radiator, to shorten current path, reduce parasitic inductance, reduce thermal coupling by symmetrical layout, the central airflow channel (diameter 40mm) formed by combining fin center Forced convection, temperature difference can be reduced to <5 ℃, in combination with the fan of radiator top, low thermal resistance, high power density and electromagnetic compatibility optimization can be realized.