5results 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 invention provides a stacked transistor, a preparation method thereof, a device and electronic equipment. The method comprises the following steps: forming a first active structure and a second active structure which are stacked on a substrate; forming a first source-drain epitaxy of the first transistor based on the first active structure; reversing the wafer and thinning the substrate; forming a second source-drain epitaxy of the second transistor based on the second active structure; forming a second source drain metal, a second interlayer dielectric layer, a second gate structure and a second back-end interconnection layer of a second transistor based on the second active structure; a first interlayer dielectric layer and a first gate structure of the first transistor are formed based on the first active structure; forming a source-drain interconnection through hole and first source-drain metal of the first transistor in a source-drain region of the first transistor; the source-drain interconnection through hole penetrates through the first source-drain epitaxy and extends into the second source-drain epitaxy; the second source-drain epitaxy and the first source-drain epitaxy are electrically connected through a source-drain interconnection through hole; and forming a first back-end interconnection layer of the first transistor.

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.

The application discloses an electrochromic device and an electronic device. The electrochromic device comprises two parallel and opposite electrode layers, an electrochromic functional layer between the electrode layers, at least two main division gaps in the electrode layers, the main division gaps dividing the electrode layers into multiple independent electrode blocks, the main division gaps in the two electrode layers being mirror-symmetrical, multiple parallel secondary division gaps in the electrode blocks, the secondary division gaps dividing the electrode blocks into multiple sub-electrodes, one end of the secondary division gaps being cut off at a main division gap adjacent to the electrode block, the other end of the secondary division gaps being cut off at the edge of the electrode layer included in the electrode block, the direction perpendicular to the plane where the electrode layers are located being a first direction, and the secondary division gaps in the two electrode blocks being intersected in different planes for the two electrode blocks vertically opposite in the first direction, so that the electrochromic device is divided into multiple pixels. The application can realize real-time conversion dynamic display, improve the uniformity and response speed of electrochromism.

This invention relates to the field of secondary battery technology and discloses a wound battery. The negative electrode sheet contains silicon-based material with a silicon content of ≥3% by mass. The negative electrode sheet has multiple negative electrode tabs. The arc segment of the positive electrode sheet has a first groove. The arc segment of the negative electrode sheet has a first concave-convex structure including a first protrusion and a first recess, and the projection of the first protrusion is at least partially located within the first groove. This invention reduces internal resistance and uniforms current distribution through the multi-tab structure; mitigates heat generation from lithium desorption through the first groove; releases expansion stress through the first concave-convex structure; and effectively suppresses heat accumulation in the arc region by forming a heat dissipation space through the cooperation of the first protrusion and the first groove, thereby improving the rate performance and high-temperature cycle performance of the battery.