4results about How to "Avoid structural collapse" patented technology

A battery pack according to one embodiment of the present invention includes: one or more battery modules; a housing for accommodating the battery modules; and an upper heat sink disposed above the battery modules on the upper part of the housing. The battery pack according to one embodiment of the present invention has the following effects: if the battery modules within the battery pack experience excessive temperature rise or fire, it delays the rate of heat transfer, controls the temperature of the battery pack leads, and prevents structural collapse of the upper part of the battery pack.

This application relates to the field of sodium-ion batteries, specifically to an outdoor low-temperature sodium-ion battery and its preparation method. The preparation method of the positive electrode active material of this sodium-ion battery is as follows: Preparation of a mixed solution: soluble salts of nickel, manganese, and niobium are dissolved and mixed to obtain a mixed solution; Co-precipitation: under an inert atmosphere, the mixed solution is mixed with a precipitant and heated for co-precipitation, then filtered and dried to obtain a precursor; Mixed calcination: the precursor, sodium source, and acetylene black are mixed, pre-sintered at 450-550℃, then sintered at 850-900℃, and after crushing and grinding, the positive electrode active material is obtained; the sodium source includes at least one of sodium carbonate and sodium acetate. This application uses a nickel-manganese-niobium ternary metal synergistic preparation of the positive electrode active material, utilizing pre-sintering and high-temperature sintering to form a stable O3-type layered oxide structure, in which the tightly packed oxygen atom layers are Na. + It provides continuous diffusion channels, and the paths are not easily blocked by lattice contraction at low temperatures.

The present application relates to the field of preparation of bio-based multi-level pore carbon material and environmental governance, in particular to a kind of bio-based three-dimensional multi-level pore carbon material and its preparation method and application.The preparation method of bio-based three-dimensional multi-level pore carbon material of the present application includes the following steps: biomass raw material and phenol, composite acid catalyst are mixed and reacted 1, to obtain bio-based liquefied material;Bio-based liquefied material is mixed with composite base catalyst and polyformaldehyde, and then reacted 2, to obtain bio-based liquefied resin;Bio-based liquefied resin is mixed with surfactant, foaming agent, metal-based DES and curing agent, and then foamed, to obtain carbonization precursor;The carbonization precursor is subjected to carbonization treatment, and then ultrasonic water washing is carried out, to obtain bio-based three-dimensional multi-level pore carbon material.The bio-based three-dimensional multi-level pore carbon material prepared by the method of the present application has uniform structure, contains micron-nanometer multi-level pore structure, and has high adsorption performance.

The application relates to the technical field of biomaterials, and discloses a high-biocompatibility hydrogel based on enzyme catalysis cross-linking and a preparation method thereof, which comprises the following steps: mixing a polypeptide mother liquor containing a tyrosine residue, functional nanoparticle tyrosinase and an MES buffer solution to obtain precursor solution A; mixing gelatin, recombinant elastin and a phosphate buffered saline solution to obtain a polymer mother liquor, and adding microbial transglutaminase into the polymer mother liquor to obtain precursor solution B; and mixing and reacting the precursor solution A and the precursor solution B to obtain the high-biocompatibility hydrogel based on enzyme catalysis cross-linking. In the application, the interpenetrating network constructed by the tyrosinase and the microbial transglutaminase sequentially catalyzes a significant synergistic enhancement effect. In a hyperglycemic environment, a mesoporous silica nanoparticle built-in level connection system is automatically activated, realizing multiple effects of antibiosis, anti-inflammation and promotion of angiogenesis.