5results about How to "Guaranteed electrical contact" patented technology

The present invention relates to a negative electrode active material, comprising: a silicon-based core particle; and an outer carbon coating formed on the silicon-based core particle, wherein the outer carbon coating comprises graphene having a D / G ratio of 0.35 or less in a Raman spectrum.

The present application belongs to the technical field of vehicle glass, and in particular, relates to a vehicle and a sliding window thereof, comprising a vehicle window glass, a heating module and a window frame mechanism, wherein the window frame mechanism comprises a frame body and two guide rails, wherein the two guide rails are respectively arranged on both sides of the frame body, the vehicle window glass comprises a fixed glass and a sliding glass, wherein the fixed glass is arranged in the frame body and has a window, and the sliding glass is slidingly arranged on the two guide rails, and the heating module comprises a first heating circuit, a second heating circuit and an electrical contact assembly, wherein the electrical contact assembly is in electrical contact with the second heating circuit, and the first heating circuit is electrically connected to the electrical contact assembly through a wire. When the sliding glass slides, as the wire is extended and shortened, the first heating circuit and the second heating circuit can always maintain electrical connection, thereby eliminating the connection mode of the electrical contact plug, improving the electrical connection stability of the first heating circuit and the second heating circuit, and thus ensuring the stable operation of the heating module of the sliding window during long-term use.

The utility model discloses a side expansion bus connector, which comprises a side expansion sleeve, a fixing hole is formed in the side expansion sleeve, an electric contact is arranged in the fixing hole, a fixing groove is formed in one end of the side expansion sleeve with a large radius, a side bus coupler is arranged in the fixing groove, a connecting hole is formed in one end of the electric contact, and the side bus coupler is arranged in the connecting hole. The other end of the electrical contact is provided with a conductive sphere, the conductive sphere is located in the fixing groove and clamped in one end of the fitting, the outer wall of the electrical contact is provided with a plurality of annular grooves, the side expansion sleeve is provided with corresponding protruding blocks, the two ends of the side bus coupler are connected to the interior of the side expansion sleeve, and the middle end of the inner wall of the side bus coupler is provided with a limiting ring. The side buscouple is sleeved on the outer wall of the fitting, the outer wall of the fitting is provided with a limiting groove, a limiting ring is arranged in the limiting groove, the middle end of the fitting is provided with a fixing block, two ends of the fixing block are respectively provided with a connecting block, the connecting blocks are clamped with the conductive sphere, and the connecting blocks are provided with chamfers.

The application provides a silicon-carbon negative electrode material and a preparation method thereof, a negative electrode sheet and a battery. The silicon-carbon negative electrode material comprises a core and a carbon coating layer coated on the core; the core comprises a porous carbon framework and silicon particles, and the silicon particles are arranged in the pores of the porous carbon framework; there is a gap between the silicon particles and the surface of the pores of the porous carbon framework; in the core, the volume of the gap is V1, the volume of the silicon particles is V2, and V1 / V2 is 0.04-0.9. The silicon-carbon negative electrode material provided by the application has a buffer cavity reserved between the silicon particles and the pores of the porous carbon framework for silicon expansion, and can realize a silicon-carbon negative electrode material with low expansion and excellent electrical performance.

The invention discloses a silicon-based negative electrode material with high specific volume and high power and a preparation method of the silicon-based negative electrode material, and relates to the technical field of negative electrode materials. The silicon-based negative electrode material sequentially comprises a second carbon layer, a first carbon layer, a large-length-diameter-ratio conductive agent winding layer and an inner core from outside to inside, wherein the inner core is a carbon skeleton adsorbed with silicon particle units. The invention also provides a preparation method of the silicon-based negative electrode material. According to the invention, the problem of silicon material aggregation stress concentration is solved through a carbon skeleton, the problem of coating uniformity is solved through gas-phase carbon attachment, and the problem of coating shell strength is solved through solid-phase coating, so that expansion of the silicon material can be limited, the cycle performance is improved, contact between the silicon material and an electrolyte is isolated, and side reaction and gas production are avoided.