2results 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.

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.