159 results about "Mass energy" patented technology

The invention relates to the technical field of cutting machine control, in particular to a wire cutting machine feeding speed control system and method.The wire cutting machine feeding speed control method comprises the steps that a multi-mode signal recognition material module extracts current and vibration signal features through the self-adaptive feature selection technology, and the current and vibration signal features are obtained on the basis of an improved random forest model; a processing material is identified by combining dynamic weight voting and a weighted fusion method, and online learning and model updating are supported so as to adapt to processing requirements of different materials. The double-loop self-adaptive control module comprises outer-loop initial compensation and inner-loop fuzzy PID adjustment, real-time fine adjustment parameters are optimized according to historical machining records and double-target error values, machining precision and stability are ensured, and machining quality is improved. And the energy consumption management optimization module intelligently regulates and controls the energy consumption of the system by identifying non-processing and processing periods, so that the overall energy efficiency is improved, and energy-saving production is realized. According to the invention, the efficiency and the accuracy of the wire cutting machine in machining of multi-variety and small-batch dies are improved.

The invention provides a test system and method for simulating a blow-off stage of a crevasse accident, and relates to the technical field of nuclear reactors, the test system for simulating the blow-off stage of the crevasse accident comprises a fluid generation module, a test body, a crevasse module, a mass energy recovery module and a data acquisition module; the data acquisition module is used for acquiring test data for test analysis; the fluid generation module is used for generating two-phase fluid mixed by saturated water and steam and introducing the two-phase fluid into the test body through a first pipeline; the test body is a reactor core simulation body and is used for heating the two-phase fluid and introducing the two-phase fluid into the crevasse module through a second pipeline; the crevasse module is used for spraying two-phase fluid; and the mass-energy recovery module is used for recovering the sprayed fluid through a third pipeline, and performing mass-energy balance evaluation through the recovered fluid, so that the technical problem that a large break accident spraying stage test method in a nuclear reactor scene is lacked in the prior art is solved.

The invention relates to the technical field of solid-state lithium ion batteries, in particular to a composite solid-state electrolyte diaphragm, a preparation method and an all-solid-state battery. According to the invention, a 3D ion / electron channel is constructed through a cellulose skeleton, an oxide electrolyte nanowire directional arrangement technology is adopted, and an in-situ interface lithium fluoride repairing layer is adopted, so that the industrialization bottleneck that high ion conduction-mechanical strength-interface stability is difficult to collaboratively optimize in the prior art is broken through; the common problems of insufficient bulk phase and interface ion conductivity, poor mechanical strength, poor compatibility with a high-nickel positive electrode / silicon carbon negative electrode and the like of a solid-state battery are effectively solved. The mass energy density of the prepared all-solid-state battery can reach 360 Wh / kg, the capacity retention ratio can still be maintained at 80% or above after 1100 times of circulation, and the all-solid-state battery successfully passes 190 DEG C thermal runaway and acupuncture tests and shows excellent safety performance and wide industrial application prospects.

The utility model relates to the technical field of battery thermal management, and discloses a battery thermal management device and a battery pack, and the battery thermal management device comprises a plurality of heat pipes, a battery cell and a cooling piece. According to the battery heat management device with the structure, in a cooling mode, a liquid working medium in the evaporation section at the bottom of the heat pipe is heated and evaporated into a gaseous working medium, the gaseous working medium rises to the condensation section at the top of the heat pipe, the gaseous working medium is in contact with a low-temperature wall surface of the condensation section to be condensed into the liquid working medium, and the liquid working medium flows back to the condensation section at the bottom of the heat pipe by gravity; and heat exchange circulation is achieved. The transition section, the condensation section and the evaporation section of the heat pipe are all in contact with the battery cell, so that the heat exchange area is greatly increased, the heat exchange amount is increased, and the cooling effect of the battery cell can be remarkably improved. The arrangement number of the cooling plates can be reduced, so that the arrangement of the cooling pipelines can be simplified, the occupied space of the cooling plates and the cooling pipelines can be reduced, and the volume utilization rate and the mass energy density of the battery thermal management device and the battery pack can be improved.

The invention discloses a high-strength sealing metal plate welding structure battery box of a new energy storage system, and relates to the technical field of energy storage equipment, the high-strength sealing metal plate welding structure battery box comprises a battery box main body, four side edges of the battery box main body are semi-enclosed tubular structures, and the tubular structures and the battery box main body are integrally formed; an inward concave boss is arranged at the bottom of the battery box main body, the boss and the battery box main body are integrally formed, an electrical mounting plate is fixed on the inner wall of the front side of the battery box main body, a front module rib plate and a rear module rib plate are fixed in the battery box main body, and the boss is positioned between the front module rib plate and the rear module rib plate. According to the battery box body, the tubular structure is arranged, so that the battery box body has relatively high torsion resistance and bending resistance, and the tubular structure and the battery box body are integrally formed, so that the battery box body has relatively good sealing performance, the internal space of the battery box body can be more effectively utilized, and the grouping efficiency and the mass specific energy of the battery box body are greatly improved.

The invention provides a construction method of a low-internal-resistance lithium ion battery based on a graphene-carbon nanotube three-dimensional conductive structure, which comprises the following steps: step 1, preparation of a three-dimensional conductive composite material: preparing the three-dimensional conductive composite material from graphene oxide (the thickness is 0.8-1.2 nm, and the number of layers is less than or equal to 3), carboxylated carbon nanotubes (the tube diameter is 20-50nm, the thickness is 0.8-1.2 nm, and the number of layers is less than or equal to 3), and the graphene-carbon nanotube three-dimensional conductive composite material is The preparation method comprises the following steps: mixing the raw materials (the length-diameter ratio is greater than or equal to 500) and conductive carbon black (the DBP oil absorption value is greater than or equal to 300cm < 3 > / 100g) according to the mass ratio of (1.5-3): (1-2): (0.5-1), and performing argon protection treatment in a ball mill with the power density being greater than or equal to 200W / L for 2-4 hours to form a premix; the electrochemical performance is improved, the overall internal resistance of the battery is smaller than or equal to 8 m omega (the traditional battery is larger than or equal to 20 m omega), the 5C discharge capacity retention ratio is larger than or equal to 88% (the traditional battery is smaller than or equal to 70%), the mass energy density is larger than or equal to 320 Wh / kg, the volume energy density is larger than or equal to 750 Wh / L, the capacity fading after 2500 times of circulation is smaller than or equal to 15% (the traditional silicon-based battery is smaller than or equal to 500 times), and the 1C discharge capacity at-20 DEG C is larger than or equal to 85% of normal-temperature capacity (the traditional battery is smaller than or equal to 60%). The lithium ion diffusion coefficient is greater than or equal to 1 * 10 <-10 > cm < 2 > / s.

The present application provides a secondary battery having high compaction density and high energy density. The secondary battery comprises a negative electrode piece, the negative electrode piece comprises a negative electrode active material, the negative electrode active material comprises a first particle size material and a second particle size material, the average particle size D1 of the first particle size material and the average particle size D2 of the second particle size material meet the condition that D2 / D1 is smaller than or equal to 0.6, the first particle size material comprises a silicon-carbon composite material, and the second particle size material comprises a silicon-carbon composite material. The silicon-carbon composite material comprises carbon matrix particles and a silicon-based material arranged in the carbon matrix particles. According to the secondary battery, by improving the structure of the silicon-carbon composite material and matching the first particle size material and the second particle size material, the mass energy density and the compaction density of the secondary battery are improved, so that the volume energy density of the secondary battery is improved, meanwhile, the resistance of the negative pole piece is reduced, and the rate capability of the secondary battery is improved.

The invention relates to a containment comprehensive experiment system and a containment comprehensive experiment method. The containment comprehensive experiment system comprises a main equipment simulation unit, a mass energy release simulation unit and a control unit, the mass energy release simulation unit comprises a high-energy spraying pipeline, a steam injection pipeline and a water injection pipeline; the high-energy blowing pipeline, the steam injection pipeline and the water injection pipeline are respectively communicated with the main equipment simulation unit; and the control unit is used for respectively controlling the opening, closing and flow of the high-energy blowing pipeline, the steam injection pipeline and the water injection pipeline. According to the invention, the integrality and accuracy of experimental simulation can be improved.

The invention relates to the technical field of new energy batteries, in particular to a preparation method of a lithium iron manganese phosphate battery and a lithium battery thereof, and the preparation method comprises the following steps: preparing a positive plate and a negative plate; a positive plate is sequentially coated with LFMP and NCM and then dried to obtain a double-layer functional coating, the positive plate with the double-layer functional coating and a negative plate with the double-layer functional coating are assembled with a diaphragm in a lamination or winding mode, and a proper amount of electrolyte is injected to obtain the lithium manganese iron phosphate battery. The positive plate is sequentially coated with the LFMP and the NCM and then dried to obtain the double-layer functional coating, and the energy density is improved by about 4-7% compared with that of a lithium iron phosphate battery; by adopting a novel double-layer electrode structure, the internal resistance is greatly reduced; compared with a ternary battery, the safety is greatly improved, and the needling passing rate is 100%; the use of ternary materials is reduced, the cost is saved, the cost is low, and non-toxic and environment-friendly effects are achieved; the operation is simple, the effect is obvious, and mass production can be realized; and the quality energy density and the safety performance of the product are greatly improved, and the maximum benefits are brought to enterprises and customers.

The invention discloses an integrated battery module integrated with a thermal management device, which belongs to the field of thermal management of lithium ion batteries and comprises a shell, an outer wall, an inner wall, a micro-channel, an inlet, an outlet, an accommodating bin, a bare roll core upper cover plate and a tab lead-out port. According to the invention, the heat dissipation shell is used as a battery core packaging shell, and as only one layer of water-cooled jacket (micro-channel) thin wall is arranged between the cooling liquid and the bare roll core for producing heat, the heat resistance is extremely small, and the heat dissipation path is shortest, the fastest heat dissipation rate and the optimal temperature uniformity can be realized, the heat management performance is improved, and the battery is particularly suitable for ultrahigh-rate charge and discharge scenes; a battery cell independent shell and a part of module structural members are omitted, high function integration is realized, the weight is reduced from the source of the system, and the potential of light weight is larger; the integrated heat dissipation shell serves as a main force bearing structure, and the compression resistance and impact resistance of the integrated heat dissipation shell are far better than those of a traditional liquid cooling plate only serving as an additional part in combination with the enhancement effect of metal foam. Redundant parts are reduced, and the mass energy density and the volume energy density of the battery pack are improved.

The invention relates to a self-supporting alloy negative electrode and a preparation method thereof. The negative electrode is a composite material containing metal, an intermetallic compound and a high polymer material. The preparation method comprises the following steps: firstly, preparing a copper foil with a circular through hole structure through a direct current electrodeposition method, then coating a layer of polymer insulating film on one surface of the copper foil, and then depositing a layer of dual-phase alloy negative electrode active material on the other surface of the copper foil through a double-target co-sputtering method. And dropwise adding a colloidal electrolyte on the surface of the active material, curing at a certain temperature, and finally pre-embedding lithium to obtain the final alloy negative electrode. The prepared alloy negative electrode has outstanding electrochemical performance: the gram volume is higher than 1000mAh / g, the lithium intercalation and deintercalation potential is lower than 0.5 V (Vs Li / Li < + >), and the alloy negative electrode has high volume and mass energy density; the cycle life is long, and the material can stably circulate for more than 100 cycles; the growth of lithium dendrites can be inhibited, the risk of short circuit is avoided, and the safety is high. The preparation method of the electrode material is simple, and industrial large-scale production can be realized.

The invention discloses a preparation method of a sodium ion battery hard carbon negative electrode with high first efficiency and ultrahigh specific capacity. Comprising the following steps: taking a carbon-containing material as a hard carbon precursor, and carrying out pre-oxidation treatment on the hard carbon precursor through a muffle furnace; and adding a nitrogen-containing doping source into the hard carbon precursor, putting the mixture into a vacuum tube furnace containing a protective atmosphere, calcining and pyrolyzing, and naturally cooling. The carbon-containing material is used as a precursor, the nitrogen-doped hard carbon powder is prepared through high-temperature pyrolysis by adding the nitrogen-containing doping source, and the nitrogen-doped hard carbon powder is compounded with MXene to obtain the self-supporting structure electrode material, so that the space and mass energy density of the electrode is greatly improved. MXene on the surface of the hard carbon anode material not only has excellent conductivity and electrochemical stability, but also can effectively prevent electrolyte from damaging the surface structure of the hard carbon, so that the first charge-discharge efficiency and reversible specific capacity of the hard carbon anode material are greatly improved.

The application discloses a preparation method of a hard carbon negative electrode of a sodium ion battery suitable for high initial efficiency and super-high specific capacity. The method comprises the following steps: taking a carbon-containing material as a hard carbon precursor, and performing pre-oxidation treatment on the hard carbon precursor through a muffle furnace; adding a nitrogen-containing doping source into the hard carbon precursor, and placing the hard carbon precursor into a vacuum tube furnace containing a protective atmosphere to perform calcination pyrolysis and natural cooling. The application adopts the carbon-containing material as the precursor, adds the nitrogen-containing doping source to prepare nitrogen-doped hard carbon powder through high-temperature pyrolysis, and obtains a self-supporting structure electrode material by compounding the nitrogen-doped hard carbon powder with MXene, so that the space and mass energy densities of the electrode are greatly improved. The MXene on the surface is not only excellent in conductivity and electrochemical stability, but also can effectively block the destruction of electrolyte to the surface structure of the hard carbon, so that the initial charge-discharge efficiency and reversible specific capacity of the hard carbon negative electrode material are greatly improved.

The invention provides an energy storage system coordination controller and a control method, an electric energy control strategy prediction model is deployed in the energy storage system coordination controller, an electric energy control instruction matched with power grid operation data and electric energy index data is identified and output, the electric energy control instruction is reported to an upper computer, and the upper computer executes the electric energy control instruction on energy storage equipment. Therefore, the AI model is deployed on the controller to identify and output the electric energy control instruction matched with the operation condition and the system index of the energy storage equipment, and the electric energy control instruction is transmitted to the upper computer to execute control on the energy storage equipment, so that intelligent recommendation and management of the control strategy can be realized by utilizing the model, the maintenance difficulty of the control strategy is reduced, and the maintenance efficiency is improved. Only one-key updating of model training data is needed subsequently, and the dimension is simple. And the upper computer only needs to carry out equipment coordination control management according to the feedback electric energy control instruction, so that the background operation pressure is greatly reduced, the control management efficiency of mass energy storage equipment is improved, and the applicability is enhanced.

The invention provides a silicon-containing organic resin particle and a preparation method thereof, a silicon-containing organic resin particle emulsion, an isolating membrane, a secondary battery monomer, a battery device and an electric device, the volume distribution particle size Dv50 of the silicon-containing organic resin particle is 80-320 nm, and the particle size distribution (Dv90-Dv10) / Dv50 of the silicon-containing organic resin particle is less than or equal to 1.7. The silicon-containing organic resin particles are used in the isolating membrane, so that the secondary battery monomer has high reliability, high mass energy density and good cycle performance.