18650 battery 3.7v 6000mah requirements for diaphragm

　　18650 battery 3.7v 6000mah requirements for diaphragm:

　　(1) Have electronic dielectric strength to ensure positive and negative mechanical protection;

　　(2) It has a certain diameter and porosity to ensure low resistance and high positive ion conductivity, and has very good passability for lithium-ion batteries;

　　(3) It is resistant to 18650 battery 3.7v 6000mah electrolyte corrosion and has sufficient chemical and photocatalytic stability. This is because the organic solvent of the electrolyte solution is a highly optically active organic substance;

　　(4) It has excellent wettability with 18650 battery 3.7v 6000mah electrolyte and has strong ability to absorb liquid and moisturize;

　　(5) The structural mechanics are highly reliable, including puncture compressive strength, tensile strength, etc., but the thickness should be as small as possible;

　　(6) The indoor space has good reliability and leveling properties;

　　(7) Good heat resistance and automatic shutdown maintenance characteristics;

　　(8) The shrinkage rate when exposed to heat is small, otherwise it will cause short circuit failure and cause the rechargeable battery to become uncontrollable in heat.

　　In addition, power lithium batteries generally use composite membranes, which have higher requirements for diaphragms.

　　For a very long time in the future, lithium batteries will still be the most available rechargeable batteries for pure electric vehicles, including lithium manganate cathode materials, ternary system battery cathode materials, lithium iron phosphate battery cathode materials, composite carbon battery cathode materials, ceramics The technical development trends of coated diaphragms, electrolyte salts and functional 18650 battery 3.7v 6000mah electrolytes support the development of new batteries and industry development plans. As battery system technology develops in use, safety and reliability will be further improved in the next two years. Scientific research on the service life model of lithium-ion battery and the main parameters affected by the model, scientific research on the characteristics of rechargeable battery combination methods, scientific research on balancing strategies of high-efficiency large-space 18650 battery 3.7v 6000mah packs, single rechargeable battery battery charging heat model and Research on the temperature gradient analysis and control measures of assembled battery packs, and research on optimized fast charging methods for assembled batteries still need to be carried out.

　　Because the discrete system attenuation coefficient of lithium batteries is mainly caused by the precipitation of lithium metal materials on the negative surface layer, the battery charging current is closely related to the generation of the discrete system attenuation coefficient of lithium batteries, which is more harmful to the discrete system attenuation of rechargeable batteries. The coefficient is the current of the battery. A battery charged at 1C speed almost shows the development trend of the discrete system attenuation coefficient from the beginning. However, if we reduce the current to, then the time range of the battery is the discrete system Nuclear decay will be greatly delayed. The impact of charge and discharge current on the attenuation coefficient of the rechargeable battery discrete system can basically be ignored.

　　This is mainly because as the current increases, the electric polarization of the negative stage also increases significantly, which significantly increases the risk of lithium being released from the negative stage. The settled porous structure metal material promotes and accelerates the dissolution of the electrolyte solution. The reduction of negative stage dynamic characteristics causes the initial generation of nuclear decay in discrete systems.

　　At present, the main methods for producing 18650 battery 3.7v 6000mah diaphragms are wet and dry. Wet aliased phase chromatography or thermal phase chromatography, liquid hydrocarbons or small molecular hydrocarbons are mixed with polyolefin epoxy resin, and after heating and melting, a uniform compound is formed, and then the temperature is reduced to perform phase separation, and the obtained product is Pulse damper, then heat the pulse damper to a temperature close to the melting point, perform double stretching to make the molecular chains orient, and finally insulate for a certain period of time, and use the solvent remaining in the column to pass through the volatile substances to prepare the mutual Fully connected microplate membrane. In the dry process, polyolefin epoxy resin is melted, extruded, and blown into a crystalline polymer film. After crystallization and quenching, a high-trend double-layer structure is obtained, which is further stretched at high temperatures. , the crystalline surface is separated to form a porous material, which can increase the diameter of the plastic film.

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