Abstract: The present invention belongs to the field of aviation compressor control, and relates to an aviation compressor active stabilization control method based on disturbance observation and compensation. Modeling errors and external disturbances of models used in design of a controller are observed, and sub-controllers are individually designed for state variables of interest to compensate for the disturbances, thus to simultaneously solve the problems of rotating stall and surge of an aviation compressor in a variety of complex situations.

Abstract: A graphite composite negative electrode material, a preparation method therefor and an application thereof. A coating layer formed by mixing a plurality of substances is coated on the surface of graphite, the high theoretical specific capacity of titanium niobate is utilized, and carbon nanotubes and amorphous carbon are added in an auxiliary manner, the carbon nanotubes form a network structure, and the amorphous carbon stabilizes the structure of the material, which jointly improve the structural stability of the material in the charging and discharging process, and improve the first efficiency and the cycle performance of the material.

Abstract: Provided are a lithium nickel manganese oxide composite material, a preparation method thereof and a lithium ion battery. The preparation method includes: a first calcining process is performed on a nano-oxide and a nickel-manganese precursor, to obtain an oxide-coated nickel-manganese precursor; and a second calcining process is performed on the precursor and a lithium source material, to obtain the lithium nickel manganese oxide, and a temperature of the first calcining process is lower than the second calcining process. A a lower temperature, the nano-oxide may be melted, a denser nano-oxide coating layer is formed on the surface of the precursor, so the oxide-coated nickel-manganese precursor is obtained. At a higher temperature, the nano-oxide, a nickel-manganese material and a lithium element may be more deeply combined. A problem that the nano-oxide layer is easy to fall off is solved, and cycle performance of the lithium nickel manganese oxide is greatly improved.

Abstract: Provided are a top cover for a battery, and a battery. The top cover for a battery includes a body; and a pole riveting block and a plurality of pole bodies, where the plurality of poles bodies are arranged on the body, and the plurality of poles bodies are connected to the pole riveting block.

Abstract: A graphite composite negative electrode material, a preparation method therefor and an application thereof. A coating layer formed by mixing a plurality of substances is coated on the surface of graphite, the high theoretical specific capacity of titanium niobate is utilized, and carbon nanotubes and amorphous carbon are added in an auxiliary manner, the carbon nanotubes form a network structure, and the amorphous carbon stabilizes the structure of the material, which jointly improve the structural stability of the material in the charging and discharging process, and improve the first efficiency and the cycle performance of the material.

Abstract: A negative electrode plate comprising a substrate, which comprises a current collector and negative electrode active material bonded on the current collector; first lithium bands arranged on a front surface of the substrate; second lithium bands arranged on a back surface of the substrate; the first lithium bands and the second lithium bands are mutually staggered; adjacent ones of the first lithium bands are spaced apart and adjacent ones of the second lithium bands are spaced apart, respectively.

Abstract: The present application relates to the technical field of lithium battery structures, in particular to a polished aluminum sheet for a lithium battery, a top cover, and a lithium battery. The polished aluminum sheet for a lithium battery comprises: a polished aluminum sheet body provided with an explosion-proof hole suitable for mounting an explosion-proof valve therein; a first reinforcing portion protruding or recessed from one surface of the polished aluminum sheet body and continuously or discontinuously surrounding the explosion-proof hole, the first reinforcing portion being spaced apart from the explosion-proof hole; and a second reinforcing portion protruding or recessed from the other surface of the polished aluminum sheet body and continuously or discontinuously surrounding the explosion-proof hole, the second reinforcing portion being spaced apart from the explosion-proof hole.

Abstract: The present disclosure provides an electrolyte system and an application thereof. The present disclosure combines a low-density electrolyte with a secondary liquid injection technique, and adds a large amount of negative electrode film-forming additives during the secondary liquid injection process, thereby improving the protection of a negative electrode interface, reducing the side reaction of carboxylate on a negative electrode surface, and improving the cyclic performance of a battery cell.

Abstract: The present disclosure provides a lithium-ion battery. The positive electrode plate meets the following requirements: 0.35<(ln Ds)2/(D50×CW×PD)<11.95. This ensures that the dynamics of the positive and negative electrodes of the lithium-ion battery can achieve optimal matching in the fast charging process, ensure that the lithium-ion battery has a higher charging capacity, while ensuring that the lithium-ion battery has a good cycle service life and safety when it is used for long-term fast charging.

Abstract: The present disclosure provides a lithium-ion battery. The positive electrode plate and the negative electrode plate of the lithium-ion battery meet the following requirements: 0.4<(ln Ds)2/CD50/(AOI)2<18.2.

Abstract: A cobalt-free positive electrode material, a preparation method therefor, and an application thereof. The preparation method comprises: mixing a lithium source, a cobalt-free precursor NixMny(OH)2, a nickel source, and a manganese source, performing primary sintering and secondary coating and sintering, and obtaining a cobalt-free positive electrode material, wherein the nickel source comprises nickel oxide, the manganese source comprises at least one among manganese dioxide, manganese(II,III) oxide, and manganese(II) oxide, and the molar ratio of the nickel source to the manganese source is x/y.

Abstract: Embodiments herein provide methods and systems for handling a level of a sustainability in a physical infrastructure by an electronic device (100). The method includes receiving the parameter corresponding to the sustainability in the physical infrastructure. The parameter includes goals and status at the instant of usage, an interventions selected (solutions chosen by the user), an impact achieved based on each solution, local environmental challenges, and the definition of each of the individual levels and what they mean. Further, the method includes determining the level of a sustainability in the physical infrastructure based on the received parameter.

Abstract: Provided in the present disclosure are a fluorine-doped lithium positive electrode material, a preparation method therefore and the use thereof. The preparation method includes: step S1, mixing and reacting NH4F, LixNiyMnzO2 and water to obtain an intermediate product system, which includes fluorine-modified LixNiyMnzO2; and step S2, carrying out first calcination on the fluorine-modified LixNiyMnzO2 in a first oxygen-containing gas, so as to obtain a fluorine-doped lithium positive electrode material, wherein x=1 to 1.3, y=0.1 to 0.9, z=0.1 to 0.9, and x:(y+z)=1.4 to 1.6. Doping with fluorine in a positive electrode material results in the oxygen in the material being protected by fluorine, such that the primary efficiency of a lithium-ion battery is effectively improved.

Abstract: Provided is a preparation method for a layered cobalt-free positive electrode material, the method comprising the steps: (1) mixing a lithium salt, a nickel source, a manganese source, a dopant and a solvent, and subjecting same to wet ball milling to obtain a mixed slurry; (2) spray drying the mixed slurry to obtain a precursor; and (3) carrying out one instance of calcination on the precursor in an oxygen-containing atmosphere to obtain the layered cobalt-free positive electrode material. Further provided are a layered cobalt-free positive electrode material, which is obtained by the preparation method, and a lithium-ion battery containing the layered cobalt-free positive electrode material.

Abstract: The present disclosure provides a cobalt-free and nickel-free positive electrode material and a preparation method therefor, and a battery. The preparation method includes: preparing a cobalt-free and nickel-free matrix material, and mixing the cobalt-free and nickel-free matrix material, a lithium source, and a divalent manganese compound for reaction to obtain the cobalt-free and nickel-free positive electrode material. By adding the divalent manganese compound, the generation of lamellar LiMnO2 and spinel LiMn2O4 is inhibited, the generation of lamellar Li2MnO3 is promoted, and the cycle performance of the material is improved.

Abstract: The present disclosure provides a gel electrolyte precursor and use thereof. The gel electrolyte precursor comprises a gel matrix monomer, a flexible additive, a polymerization initiator, and a lithium salt. The gel matrix monomer comprises an acrylonitrile-based monomer. The use of same in a semisolid battery achieves good electrical performance, and also reduces the amount of an electrolyte used. An acrylonitrile-based polymer obtained by the in-situ polymerization and gelation of an acrylonitrile-based monomer has good flame retardant performance and high voltage resistance, improving the safety performance of a battery.

Abstract: Provided are a cobalt-free positive electrode material, a preparation method thereof and a lithium ion battery. The preparation method includes: first sintering step is performed on a lithium source material and a cobalt-free precursor, to obtain a sintered product; the sintered product is crushed to 1 to 2 ?m, to obtain a cobalt-free single crystal material; and second sintering step is performed on the cobalt-free single crystal material, a boron coating agent and a carbon coating agent, to obtain the cobalt-free positive electrode material. The cobalt-free positive electrode material prepared by the above method has advantages of stable structure, high electric capacity, excellent current rate performance and good cycle performance and the like.

Abstract: Provided in the present disclosure are a gel electrolyte precursor and an application thereof. The gel electrolyte precursor comprises a gel skeleton monomer, a flexible additive, a crosslinking agent, a polymerization initiator, and a lithium salt. Applying same to a semi-solid battery can reduce the amount of electrolyte while ensuring the electrical performance of the battery, thereby achieving the purpose of improving battery safety performance.

Abstract: The present disclosure provides a gel electrolyte precursor and use thereof. The gel electrolyte precursor comprises a gel matrix monomer, a flexible additive, a polymerization initiator, and a lithium salt. The gel matrix monomer comprises an acrylonitrile-based monomer. The use of same in a semisolid battery achieves good electrical performance, and also reduces the amount of an electrolyte used. An acrylonitrile-based polymer obtained by the in-situ polymerization and gelation of an acrylonitrile-based monomer has good flame retardant performance and high voltage resistance, improving the safety performance of a battery.

Abstract: Provided are a lithium nickel manganese oxide composite material, a preparation method thereof and a lithium ion battery. The preparation method includes: a first calcining process is performed on a nano-oxide and a nickel-manganese precursor, to obtain an oxide-coated nickel-manganese precursor; and a second calcining process is performed on the precursor and a lithium source material, to obtain the lithium nickel manganese oxide, and a temperature of the first calcining process is lower than the second calcining process. At a lower temperature, the nano-oxide may be melted, a denser nano-oxide coating layer is formed on the surface of the precursor, so the oxide-coated nickel-manganese precursor is obtained. At a higher temperature, the nano-oxide, a nickel-manganese material and a lithium element may be more deeply combined. A problem that the nano-oxide layer is easy to fall off is solved, and cycle performance of the lithium nickel manganese oxide is greatly improved.