5results about How to "Increase the effective surface area" patented technology

This invention discloses a perforated chip capacitor and its manufacturing method. The capacitor uses an integral aluminum plate with multiple through holes forming a perforated structure, and at least some of the through holes penetrate the aluminum plate. An oxide layer is formed on the entire surface of the aluminum plate, including the inner surface of the through holes. The manufacturing method includes: welding an anode lead plate to the aluminum plate; laser drilling the aluminum plate to form through holes; acid etching to increase the specific surface area; anodizing to form an oxide layer; and sequentially forming a polymer layer, a graphite layer, and a silver paste layer. This invention, through its integrated porous aluminum plate structure, replaces the traditional multi-layer laminated structure, effectively improving the problems of high leakage current, poor heat dissipation, and insufficient vibration resistance of multilayer capacitors. It also achieves high specific capacitance and low ESR, significantly improving the overall performance and reliability of the capacitor.

The invention belongs to the technical field of immune cell culture perfusion, and particularly relates to an immune cell culture perfusion device which comprises a base, a plurality of culture trays are arranged at the top of the base, fixing blocks are mounted at the bottoms of the culture trays in an inserted mode, a supporting rod is rotatably mounted at the top of the base, a sliding groove is formed in the supporting rod, and a lifting plate is slidably mounted in the sliding groove. A pump body is fixedly mounted at the top of the lifting plate, a water outlet pipe is fixedly mounted at the water outlet end of the pump body, the bottom end of the water outlet pipe penetrates through the lifting plate and is fixedly provided with a plurality of connecting pipes, and atomizing nozzles are fixedly mounted at the bottom ends of the connecting pipes and are located in the culture trays respectively, and a water inlet pipe is fixedly mounted at the water inlet end of the pump body; the sprayed culture medium can be uniformly attached to the inner wall of the culture disc, compared with the situation that the culture medium is locally gathered in a traditional device, the effective surface area of the culture medium in the culture disc is remarkably increased, and the contact efficiency of immune cells in the culture disc and the culture medium can be greatly improved through the larger surface area.

The utility model discloses a lead frame, including a plurality of parallelly arranged frame groups, and each frame group includes two frame units, and each frame unit includes a carrier area, and four pins located below the carrier area, the carrier area is divided into left carrier area and right carrier area, and the four pins are same in size and are commonly connected with middle ribs, and the two middle ribs of each frame group are equipped with connecting ribs, and the two frame units of each frame group are centrally symmetric with the center of connecting rib as the symmetry center, and the four pins of one frame unit are staggered with the four pins of another frame unit. The two frame units of each frame group are centrally symmetric with the center of connecting rib as the symmetry center, and the four pins of one frame unit are staggered with the four pins of another frame unit, so that the gap between the pins is fully utilized, thereby making the arrangement of the frame unit more compact, the material utilization rate of the lead frame is higher, and the waste of materials is reduced.

This application discloses a method for preparing a graphene / carbon nanotube composite slurry and its application, relating to the field of electrochemical sensing. The method includes: S1, placing multi-walled carbon nanotubes in concentrated sulfuric acid, reacting, washing with deionized water until neutral, and drying to obtain carboxylated carbon nanotubes; S2, adding the carboxylated carbon nanotubes to thionyl chloride, stirring the reaction, rinsing with tetrahydrofuran, and drying to obtain acyl chloride-based carbon nanotubes; S3, mixing the following components: 4.0-6.0% multi-walled carbon nanotubes, graphene microsheets... 0.2-1.0%, dispersant 0.5-1.0%, melamine 3.0-6.0%, balance NMP; S4, add graphene oxide / carbon nanotube filter material to dilute hydrochloric acid solution for acid washing and purge with nitrogen bubbles, stir evenly, filter, dry, and repeat 4 times. Mix and disperse each component in N-methylpyrrolidone to improve the uniformity of the mixture. Carbon nanotubes and graphene microsheets are uniformly dispersed in NMP to reduce the possibility of agglomeration and break up the already agglomerated groups.

The utility model relates to battery technology field especially, and particularly relates to a battery module. The battery module of the utility model, including electric core subassembly, electric core subassembly includes multiple electric core, and one heat dissipation board is clamped between every two adjacent electric core, and the heat dissipation board includes main body board and foam layer, and the main body board is sleeved in the outside of foam layer, and the foam layer is used for emitting the heat generated by electric core. The battery module of the utility model can increase the effective surface area of heat dissipation board and air contact through the foam layer of heat dissipation board, improves the uniformity of air distribution in foam layer, improves the heat exchange efficiency and avoids local overheating, thereby improves the overall performance and life consistency of battery module.