Abstract: This application relates to a lithium-ion battery, including a positive electrode, a negative electrode, and an electrolyte, where the negative electrode includes a negative electrode current collector and a negative electrode active material layer containing a negative electrode active material attached to at least one surface of the negative electrode current collector, where an average width-to-length ratio of particles of the negative electrode active material is 0.1-1; an ionic conductivity of the electrolyte is 7-15 mS/cm; and a negative electrode lithiation capacity to positive electrode delithiation capacity ratio CB is 1.05-1.5. An electric apparatus including such lithium-ion battery is also disclosed. The lithium-ion battery has a large-rate fast charging capability and good cycling performance.

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes lithium salt, the lithium salt includes lithium hexafluorophosphate, and a mass proportion of the lithium hexafluorophosphate relative to a total mass of the electrolyte is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

Abstract: A battery cell includes an electrolyte, positive and negative electrode plates, and a separator between the positive and negative electrode plates. The electrolyte includes a lithium salt including lithium hexafluorophosphate, a mass percentage of which with respect to a total mass of the electrolyte ranges from 15% to 20%. The positive/negative electrode plate includes a positive/negative electrode current collector and a positive/negative electrode film layer provided on at least one side of the positive/negative electrode current collector and containing a positive/negative electrode active material. The negative electrode active material includes a carbon-based material and a silicon-carbon composite. A mass percentage of silicon in the silicon-carbon composite with respect to a total mass of the negative electrode active material is greater than or equal to 0.3% and less than or equal to 10.0%.

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes a lithium salt, where the lithium salt includes lithium hexafluorophosphate, and based on a total mass of the electrolyte, a mass proportion of the lithium hexafluorophosphate is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

Abstract: A battery cell includes an electrolyte, positive and negative electrode plates, and a separator provided between the positive and negative electrode plates. The electrolyte includes a lithium salt including lithium hexafluorophosphate, a mass percentage of which with respect to a total mass of the electrolyte ranges from 15% to 20%. The positive/negative electrode plate includes a positive/negative electrode current collector and a positive/negative electrode film layer provided on at least one side of the positive/negative electrode current collector and containing a positive/negative electrode active material. The negative electrode active material contains carbon and silicon. A mass percentage of silicon with respect to a total mass of the negative electrode active material is greater than or equal to 0.3% and less than or equal to 3.0%.

Abstract: Provided is an intake bypass recirculation structure capable of silencing, including: an intake bypass recirculation structure body and a structure-conducted silencing device. An intake bypass recirculation cavity is provided on the intake bypass recirculation structure body. An inlet of the intake bypass recirculation structure and an outlet of the intake bypass recirculation structure that are provided on the intake bypass recirculation structure body are each connected to the intake bypass recirculation cavity. The structure-conducted silencing device is disposed inside the intake bypass recirculation cavity. In this application, during working, noise generated by a compressor is transmitted into the intake bypass recirculation cavity via an inlet of the intake bypass recirculation structure, and transmitted outside via the outlet of the intake bypass recirculation structure.

Abstract: The present application relates to a lithium ion battery and a power consuming device, the lithium ion battery comprising a positive electrode, a negative electrode and an electrolyte solution, wherein the electrolyte solution has a viscosity c of 1-6 mPa·s at 25° C., as measured in accordance with GB/T10247-2008; and the ratio CB of the lithium intercalation capacity of the negative electrode to the delithiation capacity of the positive electrode is 1.05-1.5. The lithium ion battery has high-rate fast charging capability and good cycling performance.

Abstract: A multi-objective optimized evaluation method of anti-seismic performance of a slope reinforced by a pile-anchor system is provided. The method includes: training an initial three-dimensional slope numerical calculation model to obtain an target three-dimensional slope numerical calculation model; determining numerical values to be imported into the target three-dimensional slope numerical calculation model according to deformation differences, to obtain a model analysis result; obtaining a simulation operation result according to a reinforcement scheme working condition table of the pile-anchor system; based on the model analysis result and the simulation operation result, evaluating anti-seismic reinforcing performance of the pile-anchor system to obtain comprehensive evaluation values, and then optimizing and evaluating the reinforcement schemes of an overall slope to be reinforced.

Abstract: A multiple scenario-oriented item retrieval method and system. The method includes the steps of extracting, by Hashing learning, image features from an image training set to train a pre-built item retrieval model; when an image is in a scenario of hard samples, introducing an adaptive similarity matrix, optimizing the similarity matrix by an image transfer matrix, constructing an adaptive similarity matrix objective function in combination with an image category label; constructing a loss quantization objective function between the image and a Hash code according to the image transfer matrix; when the image is in a scenario of zero samples, introducing an asymmetric similarity matrix, constructing an objective function by taking the image category label as supervisory information in combination with equilibrium and decorrelation constraints of the Hash code; and training the item retrieval model based on the above objective function to obtain a retrieved result of a target item image.

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate and an electrolytic solution; the positive electrode plate including a positive electrode active material; the electrolytic solution includes a boron-containing salt; a mass percentage of the boron-containing salt based on the total mass of the electrolytic solution is denoted as A %; an upper-limit potential of the positive electrode active material with respect to lithium metal is denoted as V1 (V); and the secondary battery satisfies: 0<A/(V1?4.1)?4 and V1>4.1; optionally, 0<A/(V1?4.1)?3. The present application is capable of improving the cycle capacity retention and cycle DCR growth rate of secondary batteries.

Abstract: The present application provides a non-aqueous electrolyte, a secondary battery, and an electrical device. The non-aqueous electrolyte includes at least two of a boron-containing lithium salt additive, a phosphorus-containing lithium salt additive, and a sulfur-containing lithium salt additive; based on a total mass of the non-aqueous electrolyte, a mass percentage of the boron-containing lithium salt additive is A1%; based on the total mass of the non-aqueous electrolyte, a mass percentage of the phosphorus-containing lithium salt additive is A2%; based on the total mass of the non-aqueous electrolyte, a mass percentage of the sulfur-containing lithium salt additive is A3%; and the non-aqueous electrolyte satisfies: 0<A1+A2+A3?3. The present application can improve cycle performance and dynamics performance of the secondary battery.

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The secondary battery includes a positive electrode plate including a positive electrode film layer, a negative electrode plate including a negative electrode film layer, an electrolytic solution, and a solid electrolyte; the solid electrolyte is disposed on a surface of the positive and/or negative electrode film layer and includes a polymer matrix and a first additive, and the first additive is configured to form an interface film on the surface of the positive and/or negative electrode film layer, where a mass percentage of the polymer matrix relative to a total mass of the solid electrolyte is denoted as A %; and a mass percentage of the first additive relative to the total mass of the solid electrolyte is denoted as B %, and the secondary battery satisfies 0.1?B/A?19.

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate, a negative electrode plate comprising a negative electrode active material; and an electrolytic solution including a first additive and a carbonate solvent, and the first additive including a boron-containing lithium salt and an ester additive, which are configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as B1 in Ah, a change in amount of gas production of the secondary battery is denoted as B2 in mL, a mass of the electrolytic solution is denoted as C in g, a reduction potential of the first additive relative to lithium metal is denoted as D.

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The secondary battery includes a positive electrode plate, a negative electrode plate and an electrolytic solution, the negative electrode plate including a negative electrode film layer containing a negative electrode active material; and the electrolytic solution including a boron-containing lithium salt, the boron-containing lithium salt being configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as A in Ah, a mass of the electrolytic solution is denoted as B in g, a mass percentage of the boron-containing lithium salt relative to a total mass of the electrolytic solution is denoted as C %; and the secondary battery satisfies: 1?B/A?5, 5×10?6?B×C %/A?0.25.

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are described. The secondary battery includes a positive electrode plate comprising a positive electrode active material, a negative electrode plate comprising a negative electrode active material, a separator being disposed between the positive electrode plate the negative electrode plate and an electrolytic solution, comprising a first organic solvent and a film-forming additive and the film-forming additive being configured to form an interface film on the surface of the positive electrode active material and/or negative electrode active material, wherein a porosity of the separator is denoted as 8%; a mass percentage of the film-forming additive relative to a total mass of the electrolytic solution is denoted as b %; and a viscosity of the electrolytic solution at 25° C. is denoted as c in mPa·s, and the secondary battery satisfies: 4? (b*?)/c?240.

Abstract: A mapping table updating method, a memory storage device and a memory control circuit unit are disclosed. The method includes: receiving, a plurality of operation commands from a host system; performing a first table updating operation according to a first operation command and a third operation command among the operation commands to read and update a first sub-mapping table and a third sub-mapping table from a rewritable non-volatile memory module; and after the first table updating operation is finished, performing a second table updating operation according to a second operation command among the operation commands to read and update a second sub-mapping table from the rewritable non-volatile memory module.

Abstract: A mapping table updating method, a memory storage device and a memory control circuit unit are disclosed. The method includes: receiving, a plurality of operation commands from a host system; performing a first table updating operation according to a first operation command and a third operation command among the operation commands to read and update a first sub-mapping table and a third sub-mapping table from a rewritable non-volatile memory module; and after the first table updating operation is finished, performing a second table updating operation according to a second operation command among the operation commands to read and update a second sub-mapping table from the rewritable non-volatile memory module.

Abstract: The present application refers to a secondary battery, a battery module, a battery pack and an electrical device. The secondary battery includes a battery housing, an electrode assembly contained in the battery housing and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a compound represented by Formula I and based on the total mass of the non-aqueous electrolyte, the compound represented by Formula I is present in an amount of A1 by mass; the secondary battery has a group margin B and the secondary battery satisfies: B is from 0.88 to 0.99, B/A1 is from 0.5 to 45. This application can provide a secondary battery having both high group margin design and high safety performance, and meanwhile having good cycle performance and kinetic performance.