3results about How to "High technical difficulty" patented technology

The present disclosure discloses a multilayer annular pore nickel-cobalt-aluminum precursor and a preparation method and a positive electrode material thereof. The precursor D50 is 8 to 20µm. It may be seen from a section diagram that there is a plurality of layers of annular pores in a secondary spherical particle structure, and a average porosity value of the section with a single particle or a plurality of particles is 6% to 14%. A co-precipitation reaction of nickel-cobalt mixed salt solution, alkali-aluminum solution, a complexing agent, and a precipitating agent is performed, a pH value and a concentration of aluminum solution at each stage are strictly controlled, and then working procedures of solid-liquid separating, washing, drying, mixing, sieving, and demagnetizing are performed to obtain the multilayer annular pore nickel-cobalt-aluminum precursor. The loose and porous morphology of the precursor is beneficial to obtain the positive electrode material by mixed lithium sintering.

The present invention discloses a device and method for pre-oxidizing carbon fiber by concentrating sunlight. The device mainly includes a wire-releasing device, a quartz tube, a catalyst micro-injection pump, a hot air device, a sunlight concentrating device and a wire-collecting device. The wire-releasing device is located at the front end of the system, the quartz tube is installed on the right side of the wire-releasing device, the catalyst micro-injection pump and the hot air device are respectively located on the upper and lower sides of the quartz tube, the right side of the catalyst micro-injection pump and the hot air device and the two sides of the quartz tube are respectively installed with sunlight concentrating devices, and the rightmost end of the quartz tube is installed with a wire-collecting device. In the method of the present invention, concentrated sunlight or a xenon lamp is used to directly heat the carbon fiber, the temperature response is fast, and a large number of heating and heat preservation devices are omitted; a catalyst solution is injected by a micro-injection pump, the concentration and dosage of the catalyst can be quantitatively controlled, the pre-oxidation rate is accelerated, the skin-core structure is reduced, and the temperature of the carbon fiber surface is controllable by adjusting the distance from the Fresnel lens to the carbon fiber surface.

A universal magnetic fragrance component mounting structure for headbands belongs to the technical field of wearable jewelry accessories. The mounting structure includes a universal mounting base and a magnetically detachable fragrance liquid storage device. The universal mounting base has a slot and elastic clamping piece at the bottom to accommodate headbands of different sizes. The top surface has a standardized magnetic coupling plane with a three-point magnetic array (including two main magnetic contacts and one auxiliary positioning magnetic point) arranged in an isosceles triangle. It also has an asymmetrical positioning boss composed of D-shaped and circular positioning pins, with snap-fit ​​grooves on both sides and an elastic sealing lip around the perimeter. The bottom surface of the magnetic fragrance liquid storage device has a corresponding asymmetrical positioning groove, a magnetic unit, an elastic anti-loosening snap, and a sealing pressing flange. This invention achieves a unique correct installation direction through the cooperation of the asymmetrical positioning boss and groove, forms a double fixation through the three-point magnetic array and the elastic anti-loosening snap, and forms a sealed space through the pressing of the elastic sealing lip and the sealing pressing flange. It features convenient assembly and disassembly, unique orientation, reliable connection, leak-proof design, and strong versatility.