5results about How to "Prevent vulcanization" patented technology

The invention relates to the technical field of batteries, in particular to a safety type less-maintenance flooded battery which comprises a battery body, a battery cover and a battery cover, and the battery body is provided with a communication channel capable of releasing oxyhydrogen; and the reaction bin covers the battery body and forms a sealed space communicated with the communication channel, and a catalysis part capable of catalyzing a hydrogen-oxygen gas composite reaction is arranged in the reaction bin. The sealed space formed by the battery body and the reaction bin is matched with the precise positioning design of the catalytic part, so that the utilization rate of oxyhydrogen gas is greatly improved, water vapor generated by an oxyhydrogen composite reaction flows back to an original single-cell battery along a directional path after being condensed, a liquid supplementing closed loop of electrolysis-composite-backflow is formed, water loss of the battery is reduced, and the service life of the battery is prolonged. And the water replenishing maintenance frequency is reduced, the trouble of frequent maintenance is eliminated, and the maintenance cost and workload of a user are reduced.

This invention discloses a low-temperature negative electrode lead paste formulation and its preparation method. The raw materials are as follows by weight percentage: lead powder: 82%-88%, barium sulfate: 5%-12%, sodium lignosulfonate: 0.2%-1.0%, humic acid: 0.5%-1.0%, carbon black: 1%-2%, expanded graphite: 1%-2%, graphene: 0.5%-1.5%, and deionized water: balance. A mixture of spherical lead powder and flake lead powder (spherical powder accounting for 60%-70%) is used. The high specific surface area of ​​the spherical lead powder improves the wettability of the electrolyte, while the layered structure of the flake lead powder increases the porosity. The synergistic effect of these two materials increases the porosity of the negative electrode active material to 65%-70% (compared to approximately 55%-60% in traditional lead paste), accelerating the dissolution of lead sulfate and the diffusion of Pb²⁺.

This utility model provides an immersion thermal management system, comprising: a working chamber for housing a heating element; a cooling unit array located within the working chamber, the cooling unit array comprising multiple cooling units arranged at intervals, each cooling unit containing a flowing cooling liquid, the heating element being located between adjacent cooling units; a first heat exchanger connected to the cooling unit array via a liquid pipeline for cooling the cooling liquid; and a gas source connected to the working chamber via a gas pipeline for supplying a high thermal conductivity gas to the working chamber, the heating element being immersed in the high thermal conductivity gas, the high thermal conductivity gas flowing within the working chamber, transferring the heat generated by the heating element to the cooling units, thereby cooling the heating element.

The application relates to the technical field of composite film materials, and particularly discloses a bifunctional composite carrier as well as a preparation method and application thereof. 1‑a X a The ceramic material is selected from at least one of Al2O3, ZrO2, YSZ, TiO2, SiC or MoSi2. The bifunctional composite carrier provided by the application has structural support strength and high-efficiency heating performance, effectively making up the blank in the prior art that no ideal support body material is used in the field of Joule heat and has excellent electric conductivity to realize rapid and uniform heating, a suitable pore structure to ensure low-resistance mass transfer, and excellent mechanical strength and stability at high temperatures.

This invention belongs to the field of SERS detection, specifically relating to a double-shell Ag-ZnAl2O4-MOF composite material, its preparation method, and its application in trace detection of organic pollutants. First, ZnAl2O4 nanoparticles are synthesized using a hydrothermal method. Then, the prepared ZnAl2O4 nanoparticles are placed into a prepared MOF growth solution to form a ZnAl2O4-MOF composite structure. Further composite with Ag nanoparticles is then formed to create the double-shell Ag-ZnAl2O4-MOF composite material. The Ag-ZnAl2O4-MOF composite substrate exhibits a synergistic effect of physical and electromagnetic reinforcement. Furthermore, due to the large specific surface area, porosity, and multiple metal sites of the intermediate MOF layer, more hot spots can be formed. The charge transfer effect generated by the composite with ZnAl2O4 produces an electromagnetic reinforcement effect. These characteristics effectively enhance the SERS signal intensity.