486results about How to "Improve cycle life" patented technology

The invention discloses a high-cycle-performance aqueous battery, which comprises an aqueous electrolyte, a negative electrode, a first positive electrode and a second positive electrode, wherein the first positive electrode and the second positive electrode are positioned on two sides of the negative electrode, and a first diaphragm and a second diaphragm are respectively arranged between the first positive electrode and the negative electrode and between the second positive electrode and the negative electrode; the battery is provided with an electromagnetic valve, the electromagnetic valve is electrically connected with the first positive electrode and the second positive electrode to control switching of the positive electrodes in the charging and discharging loop, and every time discharging and charging circulation are completed, the electromagnetic valve switches the electrode connection relation, and the first positive electrode and the second positive electrode are alternately connected into the charging and discharging loop. Switching of the two positive electrodes in the aqueous battery is accurately controlled through the electromagnetic valve, a positive-negative battery structure is formed in real time, the double positive electrodes alternately perform lithium removal-lithium intercalation reaction, excessive Li intercalation or insufficient positive electrode reduction caused by long-term charging and discharging of a single positive electrode is avoided, the structural stability of the positive electrode material is improved, and the service life of the battery is prolonged. The cycle life and the electrochemical performance stability of the aqueous battery are obviously improved.

The invention relates to the field of solid-state batteries, in particular to a halide electrolyte, a preparation method and a solid-state battery. The halide electrolyte comprises a tin element, and the chemical formula of the halide electrolyte is Li2Zr < 1-x > Sn < x > Cl < 6-4x > O < 2x >, and x is less than or equal to 0.3. Through tin-oxygen co-doping, force is exerted at the same time from the two aspects of crystal structure (bulk phase) and interface chemistry, the key problems of ionic conductivity, electrochemical stability, interface compatibility and the like are cooperatively solved, the cost and the process are perfectly considered, and an all-solid-state battery electrolyte solution with a great commercialization prospect is provided.

The invention provides a lithium metal negative electrode, a battery and a preparation method. Specifically, the lithium metal negative electrode comprises a lithium metal sheet and a first coating located on the surface of the lithium metal sheet; wherein the first coating layer is prepared from MXene modified by polyethylene glycol and-SH. MXene in the first coating has lithium affinity, a conductive network can be formed on the outer side of the lithium metal sheet, and the compatibility of the first coating and the sulfide solid electrolyte can be improved due to the existence of polyethylene glycol and-SH modification, so that the lithium metal sheet can be prevented from being in direct contact with the sulfide solid electrolyte through the first coating; ion conduction is ensured, electron permeation is inhibited, and self-discharge is reduced; in addition, polyethylene glycol enables the first coating to have certain mechanical flexibility, so that the first coating can adapt to volume change in the lithium deposition / stripping process, dendrite growth is inhibited, the cycle life of the battery is prolonged, and the safety of the battery is improved.

The invention provides a silicon-carbon composite negative electrode material, a preparation method of the silicon-carbon composite negative electrode material, a lithium ion battery negative electrode plate containing the silicon-carbon composite negative electrode material and a lithium ion battery, and relates to the technical field of lithium ion batteries. The silicon-carbon composite negative electrode material comprises a porous carbon skeleton, silicon distributed in internal pores of the porous carbon skeleton, and a functional interface layer covering the outer surface of the skeleton, wherein no free silicon elementary substance exists on the outer surface of the porous carbon skeleton, and the functional interface layer comprises a metal fluoride passivation layer formed by reacting metal elements doped in the carbon skeleton with a fluorine-containing etching agent; and the hybrid electrolyte coating layer is formed by reacting an oxygen-containing or nitrogen-containing functional group grafted on the surface of the carbon skeleton with a fluorine-containing etching agent. According to the technical scheme, the stable interface layer with passivation protection and ion conduction functions can be constructed in situ while high-activity silicon on the surface is removed, so that the first coulombic efficiency, the cycling stability and the rate capability of the battery are remarkably improved, side reactions are reduced, and the safety of the battery is improved.

The application discloses a compound and application thereof, and belongs to the technical field of display. A chemical structural formula of the compound is shown in the following formula: wherein Z1 and Z2 are independently O, S or Se; R1 and R2 are independently ; or one of R1 and R2 is ; Z3 to Z6 are independently N or CR4; the other of R1 and R2, R3 and R4 are independently hydrogen, deuterium, fluorine, cyano, C1-C10 alkyl, C1-C10 perfluoroalkyl, C1-C10 perfluoroalkoxy, C1-C10 perfluoroalkylthio, pentafluorothio, one of substituted or unsubstituted C6-C30 aryl, or substituted or unsubstituted C3-C30 heteroaryl; and A is O, S, S=O, SO2 or Se. The compound has high charge transfer capacity and thermal stability, and an OLED device prepared based on the compound has low working voltage, high efficiency and long cycle life.

The application provides a positive plate preparation method based on electrolyte moisture control and a battery. The core rule that "moisture of solid-state electrolyte wet powder is a key factor affecting the moisture of the positive plate" is first determined, and the long-standing error cognition in the industry that "controlling the total moisture of the slurry is enough" is corrected, providing a scientific theoretical basis for moisture control. By detecting three indexes before the slurry is used, the moisture of the positive plate can be accurately predicted whether it will exceed the standard, and the risk of scrapping the whole batch of positive plates is fundamentally avoided. By strictly controlling the moisture of the positive plate, the side reactions in the battery are effectively reduced, the capacity retention rate, rate performance and cycle life of the battery are improved, and the safety hazards such as swelling and thermal runaway caused by excessive moisture are reduced.

This utility model discloses a dual-battery charging and discharging circuit, including: a control module, a first switch module, a second switch module, a first battery, and a second battery; the control module is connected to the first battery and the second battery respectively, and is used to detect the voltage of the first battery and the second battery; the control module is also connected to the first switch module and the second switch module respectively, and is used to control the conduction and cutoff of the first switch module and the second switch module according to the voltage difference between the first battery and the second battery, so as to realize the switching of charging and discharging modes. In the discharging mode, the high-voltage battery is given priority to be powered or the batteries are connected in parallel to be powered; in the charging mode, the low-voltage battery is given priority to be charged or the batteries are connected in parallel to be charged.

This invention relates to a boron-doped multi-element polyanionic sodium-ion battery cathode material and its preparation method, comprising the following steps: [The method involves] mixing Na₄Fe₂O₃ with... 3‑X B X (PO4) 2‑Y (SiO4) Y The stoichiometric ratio of P2O7 is determined by adding ferrous source, boric acid, sodium source, phosphorus source, and silicon source to water, followed by the addition of carbon source and mixing thoroughly to obtain a mixed slurry; wherein 0.2≤X≤0.5, 0<Y≤1; the mixed slurry is then ground to obtain a sand-milled slurry; the sand-milled slurry is dried to obtain precursor powder; under a protective atmosphere, the precursor powder is sintered at 450~550℃ to obtain boron-doped multi-element polyanion sodium-ion battery cathode material. The introduction of boron and silicon elements in this invention helps reduce raw material costs, improve the electrochemical performance of the material, especially enhancing the structural stability, rate performance, and cycle life of the cathode material, and also lowers the sintering temperature, meeting the requirements for cost reduction and efficiency improvement.

Disclosed are a phosphorus-containing compound, a nonaqueous electrolyte, and a lithium ion battery. In the present application, an additive for a lithium ion battery is provided, the phosphorus-containing compound has a structure shown in formula (I), wherein the R1 and R2 groups are as described in the context of the present application, the phosphorus-containing compound is added in a nonaqueous electrolyte, and the internal resistance of the battery can be significantly reduced, particularly the internal resistance when the battery is fast-charged.

Examples of the present application provide a charging method for a secondary battery, a charging apparatus for a secondary battery, a charging device, and a computer storage medium. The method includes: acquiring a first state of health SOH1 of the secondary battery when the secondary battery is at a preset charging node; activating the lithium-supplementing material when the SOH1 is less than or equal to a first threshold, to supplement lithium for the secondary battery; performing a first charging process on the secondary battery; determining a second state of health SOH2 of the secondary battery based on a working parameter of the secondary battery in the first charging process; and charging the secondary battery when the SOH2 is greater than a second threshold.

The application discloses a kind of composite negative electrode material for all-solid-state iron air battery, its negative electrode and battery.The composite negative electrode material is composed of active substance and functional additive;Active substance is iron oxide doped with chemical element M, M is selected from one or more of W, Cr, Ti, Mn, V, Mo, Nb, Zr, Hf, Sn, Sb and Bi;Functional additive includes oxygen ion conductor and perovskite material.The application forms stable ion conductive network in situ during the reduction of iron oxide by doping with specific elements, and constructs multi-level composite conductive structure by combining oxygen ion conductor and perovskite, effectively solves the problem of ion transport collapse caused by phase change during the cycle of conversion-type negative electrode, significantly improves the coulomb efficiency, capacity development and cycle stability of all-solid-state iron air battery.

The invention discloses a composite modification film, a lithium metal negative electrode and a preparation method of the lithium metal negative electrode. The composite modified film comprises an organic polymer solid electrolyte, an inorganic solid electrolyte and a film-forming agent, and the mass ratio of the organic polymer solid electrolyte to the inorganic solid electrolyte to the film-forming agent is (10%-35%): (10%-35%): (30%-80%). The composite modified film effectively buffers cyclic stress, prevents early mechanical failure of the protective layer, and realizes mechanical durability of the interface protective layer; the immobilized film-forming agent can be slowly released, so that the continuous and stable repair of SEI is realized, the dynamic repair capability of the whole life cycle is provided, and the efficient cycle life of the battery is greatly prolonged; and the electrolyte does not need to depend on a high-concentration liquid additive, dramatic change of electrolyte components in circulation is avoided, the overall chemical stability of the battery is improved, and the stability of an electrolyte system is guaranteed.

The application relates to the technical field of batteries, in particular to a positive electrode material, a preparation method thereof, a positive electrode sheet and a battery. The positive electrode material comprises: an inner core, wherein the inner core comprises a high-nickel ternary positive electrode material; a first coating layer coated on the surface of the inner core, wherein the first coating layer comprises an oxide of cobalt, an oxide of titanium and an oxide of aluminum; and a second coating layer coated on the surface of the first coating layer, wherein the second coating layer comprises an oxide of selenium; wherein the surface of the high-nickel ternary positive electrode material is treated by an organic acid. The technical scheme can reduce the residual alkali on the surface of the material, effectively improve the structural stability and interface stability of the material in the long-term cycle process, and thus realize excellent cycle life and capacity retention rate.

The invention relates to the technical field of batteries, in particular to a positive electrode material, a preparation method and application thereof and an all-solid-state battery. The positive electrode material comprises an inner core and an outer core, wherein the inner core contains a nickel-rich ternary material; the interface modification layer is coated on at least part of the surface of the inner core, and the interface modification layer comprises lithium phosphorus oxide and metal sulfide. According to the positive electrode material, the interface impedance of the battery can be better reduced, the critical current density is improved, and the cycle life is prolonged.

The application discloses a preparation method of a nitrogen-containing heterocyclic compound and an alkali metal salt of the nitrogen-containing heterocyclic compound, and steps of the preparation method of the nitrogen-containing heterocyclic compound comprise: (1) uniformly mixing trithiocyanic acid with a first solvent, introducing sulfuryl fluoride gas or adding an alkenyl sulfonyl fluoride to perform a reaction, and obtaining a crude product through a crude treatment after the reaction is finished; (2) purifying the crude product to obtain the nitrogen-containing heterocyclic compound shown in a structural formula 1; wherein R1, R2 and R3 are each independently selected from -H, -SO2F or -CH2-(CH2) n -SO2F, n is an integer selected from 1-10, and R1, R2 and R3 are not H at the same time. The preparation method of the nitrogen-containing heterocyclic compound and the alkali metal salt of the nitrogen-containing heterocyclic compound can be applied to a large amount of trithiocyanic acid in a lithium battery electrolyte, raw materials are easy to obtain, operation is simple, the yield is high, the condition is mild, the requirement for equipment is low, and the method is suitable for industrial production.

The application discloses a new energy electric drive system of a novel green intelligent carrying frame, which comprises a multi-source energy supply module, an intelligent driving module, an energy efficiency control module, an energy recovery module and a communication interaction module.The multi-source energy supply module is used for supplying energy under different working conditions for the carrying frame.The intelligent driving module is used for driving walking mechanisms arranged on both sides of the carrying frame.The energy efficiency control module is used for generating a dynamic energy consumption adjustment decision by using an energy consumption optimization algorithm and sending the decision to the multi-source energy supply module and the intelligent driving module.The energy recovery module is used for monitoring the running state of the carrying frame in real time to start an energy recovery process and output electric energy to the multi-source energy supply module.The communication interaction module is used for establishing an information transmission channel between the intelligent driving module, the energy efficiency control module and a warehouse intelligent scheduling system.The novel green intelligent carrying frame has the remarkable effects that the green environmental protection, energy utilization efficiency and intelligent operation capacity of the carrying frame are remarkably improved through multi-element new energy collaborative power supply, full-working-condition high-efficiency driving, intelligent energy efficiency control and precise energy recovery.

The application relates to the technical field of electric tools, in particular to a battery cell containing structure and a soft package battery. The battery cell containing structure comprises a first half shell and a mounting bracket. The first half shell is provided with a bottom plate and a shell side wall connected with each other. The mounting bracket comprises a mounting partition plate and a first side plate connected with the mounting partition plate perpendicularly. The mounting partition plate is parallel and spaced apart from the bottom plate, and the first side plate extends towards the bottom plate. The mounting partition plate, the bottom plate and the first side plate enclose a containing cavity for containing a soft package battery cell. The surfaces of the mounting partition plate and the bottom plate facing the containing cavity extend horizontally, and the surface of the first side plate facing the containing cavity extends vertically. The application effectively physically restricts the soft package battery cell, avoids position deviation or collision of the soft package battery cell, improves the stability and service life of the battery, and improves the space utilization of the battery to a certain extent.

The application discloses a high-rate valve-regulated lead-acid battery and a preparation method thereof. The battery comprises a battery shell, a positive plate, a negative plate and an electrolyte arranged in the battery shell. The positive plate and the negative plate are both honeycomb lattice structure plates, and the positive plate is coated with a positive active material, and the negative plate is coated with a negative active material. The components of the positive active material include lead powder, graphite, sulfuric acid, nano lead dioxide and pure water. The components of the negative active material include lead powder, barium sulfate, sodium lignosulfonate, graphene composite additive and carbon black. The discharge rate of the high-rate valve-regulated lead-acid battery can reach 3-5C, and the discharge capacity retention rate is above 95% under the 1C discharge rate, which can meet the demand of 5G base stations, data centers and other fields for instantaneous large current and high power output.

This invention relates to the field of power management technology, and particularly to an intelligent integrated power system and control method based on multi-source collaboration, including a main power module, a backup power cluster, an energy management unit, a voltage adaptation module, a status monitoring unit, a communication module, and a load interface. Compared to existing technologies that typically use a single type of battery pack as a backup power source, which suffers from slow response speed and difficulty in withstanding instantaneous high-power surges, this invention employs a heterogeneous energy storage system composed of parallel lithium battery packs and supercapacitor modules as the backup power cluster, and uses a bidirectional DC / DC converter for intelligent control. This solution fully leverages the different advantages of lithium batteries (high energy density) and supercapacitors (high power density and rapid response), enabling the system to provide both long-term backup power support and instantaneous high-power discharge, thereby significantly improving the dynamic response capability, power support reliability, and overall service life of the backup power source.

The application relates to the technical field of battery materials. Disclosed are a lithium nickel-manganese acid positive electrode material, a preparation method thereof, a positive electrode and a battery. The lithium nickel-manganese acid positive electrode material comprises a base material and a first coating layer and a second coating layer successively coated on the surface of the base material; the chemical general formula of the base material is Li(Li a Ni b Mn c Fe d Sb e )O 4‑x , wherein a+b+c+d+e=2, 0<=x<=0.2, 0<=a<=0.1, 0.4<=b<=0.5, 1<=c<=1.5, 0.1<=d+e<=0.4; the first coating layer comprises NbTi(PO4)3, and the mass ratio of the first coating layer to the base material is 0.1-5:100; the second coating layer comprises a carbon material, and the mass ratio of the second coating layer to the base material is 0.1-5:100. The lithium nickel-manganese acid positive electrode material provided by the embodiment of the application has excellent electrochemical performance.

The invention provides a battery monomer, a negative pole piece, a battery device and a power utilization device, the battery monomer comprises the negative pole piece, the negative pole piece comprises a bottom coating arranged on at least one side of a negative current collector, and the bottom coating comprises a plurality of first bulges protruding back to the negative current collector and a first concave part between two adjacent first bulges; the bottom coating layer comprises a first binder; the active material layer is arranged on one side, opposite to the negative electrode current collector, of the bottom coating layer, the active material layer comprises a plurality of second bulges protruding towards the bottom coating layer and second concave parts between two adjacent second bulges, and the active material layer comprises a second binder; the first bulge is coupled with the second concave part, and the second bulge is coupled with the first concave part; the mass content a of the first binder in the undercoat layer is greater than the mass content b of the second binder in the active material layer. The dynamic performance and the cycle life of the battery monomer are relatively good; the battery device and the power utilization device at least have the above beneficial effects.

This application provides a method for regenerating ternary cathode materials based on acid etching and molten salt lithium replenishment, as well as the regenerated electrode material and battery. The method includes the following steps: pretreating the failed ternary battery cathode material with an organic acid solution; mixing the pretreated failed ternary battery cathode material, dopant, and lithium-containing molten salt, and performing a first-stage low-temperature molten salt heat treatment at a first specified temperature; further subjecting the material after the first-stage low-temperature molten salt heat treatment to a second-stage high-temperature heat treatment at a second specified temperature for 2-4 hours; and washing and drying the product after the second-stage high-temperature heat treatment to obtain the regenerated ternary cathode material. The wet acid etching process selectively removes rock salt phase impurities and contaminants from the electrode material surface, achieving interface cleaning and activation; the molten salt method for lithium replenishment using multi-element synergistic doping introduces multiple beneficial elements for bulk phase doping while replenishing lithium, thereby simultaneously strengthening the material's crystal structure and interface stability.

The invention provides a preparation method and application of a composite diaphragm with a multistage nanometer branch structure, and belongs to the technical field of lithium metal batteries. A polymer matrix, a first structure inducer and a second structure inducer form a precursor solution, and the precursor solution is subjected to an electrostatic spinning process and in-situ induction to form the multi-stage structure composite diaphragm with a trunk-branch characteristic; the first structure inducer is a quaternary ammonium salt compound, and the second structure inducer is imidazolium ionic liquid. The dual-inducer system endows the lithium metal negative electrode with interface stability and cycle reliability.

The application provides a flaky flower-like single-crystal sodium vanadium oxyfluorophosphate / carbon composite material, a preparation method thereof and a sodium ion battery. The flaky flower-like single-crystal sodium vanadium oxyfluorophosphate material is prepared through a hydrothermal reaction. A surfactant is used to control the crystal face growth direction in the material synthesis process, so that the sodium vanadium oxyfluorophosphate grows to form a flaky flower-like single-crystal structure, and then the ion transmission distance is shortened, the ion kinetic characteristics of the material can be effectively improved, and on the basis of ensuring the structural stability of the material, that is, the cycle performance, the rate characteristics of the material are effectively improved. Through carbon coating, the electronic conductivity of the surface of the material particles is improved, and the capacity rate performance of the material is effectively improved.

Lithium manganese iron phosphate (LMFP) batteries, systems, and methods. Lithium manganese iron phosphate (LMFP) battery systems, cells, and methods configured to smooth the step-like voltage behavior inherent to the LMFP chemistry are disclosed. The present disclosure describes blending LMFP cathode materials with different iron to manganese ratios to moderate the multi-phase redox reactions, resulting in more ramped voltage profiles during charge and discharge. Blending cathode materials can be integrated at the material level, electrode level, cell level, or battery pack level to improve state-of-charge estimation, power control, and battery management system performance while maintaining the inherent safety, cost, and cycle life advantages of the LMFP chemistry. The disclosed systems support a modular battery architecture suitable for electric vehicles, heavy-duty applications, and stationary energy storage. By reducing the steep voltage jumps without introducing higher risk chemistries, the disclosed approach enables improved controllability, reliability, and scalability of LMFP-based energy storage systems.

The application provides a method for determining a cell restraint gap, a cell, a battery pack and a power utilization device, and solves the problem of long cycle and high cost consumption in the prior art by relying on the experience trial and error method to determine the restraint gap. The risk determination method comprises: obtaining a cell thickness of a to-be-restrained cell in a restraint direction that meets a preset requirement; and determining the restraint gap of the to-be-restrained cell according to the cell thickness through a preset nonlinear function relationship. The method establishes a preset nonlinear function relationship between the cell thickness and the restraint gap, so that under the premise of meeting the specific structure condition, the optimal restraint gap suitable for the cell can be quickly and accurately determined without relying on the traditional multi-gradient trial and error verification.

The utility model belongs to the technical field of heating furnaces for preparing and storing hydrogen materials, and particularly discloses a cooling and stirring structure of a heating furnace for preparing and storing hydrogen materials, which comprises a cooling fan arranged outside a heating furnace body and a cooling component positioned in the heating furnace body, and the cooling fan is communicated with the cooling component through an air inlet pipe; a supporting assembly is arranged on the outer side of the air inlet pipe and connected with the cooling assembly, an air cylinder is arranged at the top of the heating furnace body, and the output end of the air cylinder is connected with the supporting assembly and used for driving the cooling assembly to move vertically. The cooling assembly is arranged in the heating furnace body, the cooling assembly is communicated with the external cooling fan to further cool a melt-spinning sheet falling off from the cooling roller in an accelerated mode, the air cylinder is connected with the cooling assembly, ascending and descending of the cooling assembly are achieved, and the melt-spinning sheet is crushed and stirred. The specific surface area of the material is greatly increased, the surface sites of the hydrogen storage material for adsorbing hydrogen are increased, and the hydrogen storage efficiency is effectively improved.

This invention relates to the field of sodium-ion battery technology, and discloses a sodium-ion cathode material, its preparation method and application, a sodium-ion battery, a sodium-ion battery pack, and a device. The sodium-ion cathode material includes a matrix and a coating layer covering the matrix; the matrix has the composition shown in Formula I: Na 1‑x [Ni y Mn z M u Ti v O2 Formula I; the coating layer has the composition shown in Formula II: Na 2‑β Ti 6‑α M′ α O 13 Formula II. This sodium-ion cathode material possesses characteristics such as high ionic and electronic conductivity, strong structural stability, and strong chemical stability. Furthermore, using this composite cathode material in sodium-ion batteries can effectively improve the battery's electrochemical performance.

The invention relates to the technical field of lithium ion battery positive electrode materials, in particular to an aluminum-yttrium-boric acid coated high-nickel positive electrode material and a preparation method and application thereof. The preparation method of the material comprises the following steps: synthesizing a doped and modified high-nickel ternary precursor from a mixed metal salt solution and a first aluminum source and / or a first yttrium source through a coprecipitation reaction; mixing the precursor with a lithium source, and performing first sintering treatment to obtain a base material; and mixing the base material with a solution containing boric acid, a second aluminum source and a second yttrium source, and carrying out solvent evaporation and second sintering treatment to obtain a final product. Through the synergistic effect of bulk phase doping and surface composite coating, generation of intragranular cracks and interface side reaction of the material in the circulation process are inhibited at the same time. The obtained positive electrode material successfully overcomes the technical problem that high capacity and long service life are difficult to consider at the same time, and the cycling stability is remarkably improved while the high specific capacity is kept.

The invention relates to a cooling plate assembly for a battery and a battery pack, in particular to the field of batteries, and the cooling plate assembly for the battery comprises a first cooling plate and a second cooling plate, the first cold plate is connected with heat-conducting glue of the battery; the heat conductivity coefficient of the first cold plate is 3000-50000 W / (m.K); the heat conductivity coefficient of the first cold plate is larger than that of the second cold plate. According to the cooling plate assembly for the battery, the heat conductivity coefficient of the side, in contact with the battery, of the cooling plate is optimized, so that heat can be quickly and transversely transferred before reaching the battery cell, the temperature difference is reduced, and the cycle life of the battery is prolonged.