3137 results about "Battery electrode" patented technology

Systems and apparatus may carry out analysis of battery physical phenomena, and characterize batteries based on phenomena occurring in particular time and / or frequency domains. These systems may be additionally responsible for charging and / or monitoring a rechargeable battery. Examples of battery physical phenomena include mass transport (e.g., diffusion and / or migration) in battery electrolytes, mass transport in battery electrodes, and reactions on battery electrodes.

Batteries, component structures and manufacturing methods, in particular including a glassy embedded battery electrode assembly having a composite material structure composed of interpenetrating material components including a porous electroactive network including a solid electroactive material, and a continuous glassy medium including a Li ion conducting sulfide glass, can achieve enhanced power output, reduced charging time and / or improved cycle life.

The invention relates to the technical field of lithium batteries, and discloses a lithium battery life decline quantitative prediction and health state intelligent evaluation method, which comprises the following steps: S1, multi-source data acquisition: arranging strain gauge sensors at battery electrode plates and a shell to acquire stress-strain data, integrating a gas sensor in a battery module to acquire gas data, and calculating the data of the stress-strain data; battery data and environment data are acquired by a high-precision synchronous acquisition system through nanosecond clock signals and are processed and stored, and the data quality is monitored at the same time; s2, data preprocessing: generating an extended data set through data transformation and combination and GAN-based data, and processing abnormal data by using a method based on statistics and machine learning; according to the invention, through multi-source data fusion acquisition, a stress-strain sensor and a plurality of gas sensors are added to monitor the internal mechanical change and gas component concentration of the battery, so that the problem that the accuracy and practicability of the model are greatly reduced due to a traditional method based on an electrochemical model is improved.

A glassy electroactive prepreg made by generating submicron particles of lithium-ion conducting sulfide glass by providing lithium-ion conducting sulfide glass feedstock material, and subjecting the feedstock material to subzero processing to transform the material into submicron particles can avoid plastic deformation of sulfide glass particles during grinding and produce submicron powders. The prepreg is formed by providing a porous electroactive layer comprising electroactive material, and infiltrating the porous electroactive layer with the submicron particles of lithium-ion conducting sulfide glass. The subzero processing can include cryogenic processing. The prepreg can be used to form glassy embedded electrodes.

The invention relates to a hybrid scrim / paste paper material for a plate-shaped battery electrode (2, 3) of a lead-acid battery, in particular for a positive plate-shaped battery electrode (2) of a lead-acid battery (1), wherein the scrim / paste paper material is designed as a nonwoven or woven mat and comprises: - fibers made of a first material which is chemically unstable, such that the fibers made of the first material dissolve at least substantially upon contact with an electrolyte of the lead-acid battery (1), in particular during the manufacture of the lead-acid battery (1); - fibers made of a second material which is chemically stable at least to the extent that the fibers made of the second material do not dissolve, or do not dissolve substantially, upon contact with the electrolyte of the lead-acid battery (1), in particular during the manufacture of the lead-acid battery (1);and - optionally a binding agent for the fibers from the second material;

The invention discloses an electrode assembly and a battery. The electrode assembly comprises a plurality of pole pieces and an isolating membrane arranged between two pole pieces with opposite polarities, and at least one pole piece is provided with a plurality of first convex parts; the pole piece comprises a current collector and an active material layer arranged on the surface of the current collector, the first convex part is formed by bending a part of the current collector and a part of the active material layer towards the same side of the pole piece, the height of the first convex part is H1, and H1 is more than or equal to 20 microns and less than or equal to 80 microns; the active material layer comprises a softener, the softener is selected from at least one of organic silicon, fatty acid salt and quaternary ammonium salt, based on the total weight of the active material layer, the weight percentage of the softener is A, and A is larger than or equal to 0.01% and smaller than or equal to 0.4%. In the application, the softening agent is added into the active material layer to improve the overall flexibility of the pole piece 300, so that the active material layer at the first convex parts does not generate microcracks while the height of the first convex parts is higher, further, an electrode assembly capable of meeting the use requirements can be conveniently processed, and the electrolyte infiltration effect is improved.

The invention provides a metal particle loaded self-supporting electrode material and a preparation method and application thereof, and belongs to the technical field of battery electrodes, the preparation method comprises the following steps: S1, cutting beech into pieces with the thickness of 5-7mm along the vertical growth direction, and calcining to obtain carbonized wood pieces; s2, metal salt is dissolved in the functionalized aqueous solution, the concentration of the metal salt is 0.03-0.05 M, and a soaking solution is obtained; the functionalized aqueous solution comprises dodecyl trimethyl ammonium chloride, sodium pyrophosphate, polyvinylpyrrolidone and water; s3, taking the carbonized wood chip as a working electrode, immersing the carbonized wood chip into the soaking solution, carrying out electro-deposition on a metal precursor, and then cleaning and drying to obtain a metal-loaded wood chip; and S4, pyrolyzing the metal-loaded wood chip in a hydrogen-argon mixed atmosphere, then cooling to room temperature, cleaning and drying to obtain the metal-loaded wood chip. According to the invention, the transition metal particles and the carbonized wood chips are better compounded, and more reliable active sites are provided for bromine electrochemical reaction, so that the overall performance of the zinc-bromine battery is improved.

The invention belongs to the technical field of sodium-ion battery electrolyte, and particularly discloses negative-electrode-free sodium metal battery electrolyte as well as a preparation method and application thereof. The negative-electrode-free sodium metal battery electrolyte comprises an organic solvent, sodium salt and a sodium supplementing additive; the sodium supplementing additive comprises at least one of sodium trimethylsilanolate and sodium amide. According to the electrolyte disclosed by the invention, through reasonable configuration, a compact solid electrolyte interface film (SEI film) is formed on an electrode-electrolyte interface of the negative-electrode-free sodium metal battery, so that irreversible loss of active sodium in an SEI forming stage is effectively compensated, reversible capacity loss in a circulating process is reduced, and the circulating stability and safety of the battery are improved.

The utility model discloses a battery pole piece, a secondary battery and electric equipment. The battery pole piece comprises a current collector, a priming coat arranged on the surface of at least one side of the current collector, and an active layer arranged on the surface of one side, far away from the current collector, of the priming coat, the bottom coating comprises a first conducting layer and a second conducting layer which are arranged in parallel along the length direction of the battery pole piece, the active layer at least partially covers the surface of one side, far away from the current collector, of the first conducting layer, and the surface of one side, far away from the current collector, of the second conducting layer is at least partially not covered by the active layer; the conductivity of the first conductive layer is greater than that of the second conductive layer. The bottom coating is arranged on the current collector of the battery pole piece, and the bottom coating can enable the current collector, which is not covered by the active layer, of the second conductive layer to be locally short-circuited in advance when the battery pole piece is mechanically abused, so that the safety performance of the battery is improved, and the battery pole piece has relatively good conductivity and can improve the charging capability and the energy density of the battery.

The invention discloses a lithium ion battery negative pole piece, a preparation method thereof and a lithium ion battery, and belongs to the technical field of lithium ion battery electrode materials. The lithium ion battery negative electrode plate provided by the invention comprises a negative electrode current collector; the graphite layers are arranged on the surfaces of the two sides of the negative electrode current collector; the graphite layer comprises graphite particles, a conductive agent and a binder; the hard carbon layer is arranged on the surface of one side, far away from the negative electrode current collector, of the graphite layer; the hard carbon layer comprises hard carbon particles, a conductive agent and a binder; wherein the graphite layer and the hard carbon layer meet the relational expression: 1.4 < = rho1 * D1 + rho2 * D2 + PD < = 1.75. According to the invention, through proper design of the composite layer structure, the surface density, the compaction density and the particle sizes of the graphite particles and the hard carbon particles, the rapid charging performance of the lithium ion battery is improved, and meanwhile, relatively high energy density is kept; and the negative pole piece also has relatively good flexibility, so that the problems of breakage and powder falling in the processing process are relieved.

The invention relates to the technical field of magnesium secondary battery electrode materials, in particular to a microalloyed magnesium alloy negative electrode material as well as a preparation method and application thereof, and the microalloyed magnesium alloy negative electrode material comprises the following components in percentage by mass: 0.01-2.0 wt.% of Gd and / or 0.01-2.0 wt.% of Ce, 0.01-1.0 wt.% of Mn and the balance of Mg. The preparation method comprises the following steps: weighing the raw materials according to the component proportion of the microalloyed magnesium alloy negative electrode material, smelting the raw materials, pouring, and carrying out air cooling solidification to obtain a cast ingot; the raw materials comprise pure Mg, an Mg-Gd intermediate alloy and an Mg-Mn intermediate alloy, or the raw materials comprise pure Mg, an Mg-Ce intermediate alloy and an Mg-Mn intermediate alloy; and sequentially carrying out solution treatment, extrusion treatment, rolling treatment and annealing treatment on the cast ingot to obtain the microalloyed magnesium alloy negative electrode material. The material is excellent in long cycle stability, low in overpotential, environment-friendly and low in cost.

The invention provides a safe lithium ion battery gel electrolyte as well as a preparation method and application thereof. The safe lithium ion battery gel electrolyte is prepared from the following raw materials: lithium salt, an organic solvent, a film-forming agent, a thermal initiator and a gel polymer monomer, the gel polymer monomer comprises an acrylic ester compound and a phosphate ester compound. According to the gel electrolyte provided by the invention, through cooperation and compounding of all the components, especially introduction of the phosphate ester compound, the electrolyte has relatively good safety performance; the acrylate compound has an acrylate functional group and plays a role of a cross-linking agent, the phosphate compound plays a flame-retardant role, and through thermal polymerization, phosphate with the flame-retardant role is distributed among battery pole pieces and among active particles of the pole pieces in a three-dimensional network manner along with the acrylate cross-linking agent; thermal runaway among active particles can be uniformly and effectively blocked, so that the safety of the battery can be improved.

The present invention relates to an electrode sheet having a multilayer solid-state electrolyte and a preparation method, and a solid-state battery and a preparation method. By making the solid-state battery electrode sheet comprise multiple electrolyte layers, such as an interface modification layer and an organic polymer solid-state electrolyte layer, the interface contact between a solid-state electrolyte and an electrode active substance and between the solid-state electrolyte and the battery electrode sheet is increased, such that the effects of replacing a separator, constructing a stable solid-state battery interface and improving the cycling stability of the solid-state battery can be achieved. By using a high-pressure atomization spraying method, uniform preparation of the battery electrode sheet containing multilayer solid-state electrolyte can be achieved; in addition, the thickness of each solid-state electrolyte layer is accurately controlled, and the energy density of the solid-state battery is improved.

The invention relates to the technical field of battery pole piece recovery, in particular to a waste lithium iron phosphate battery positive pole piece physical dry recovery method which comprises the following steps: fragmenting waste lithium iron phosphate battery positive pole pieces, carrying out electromagnetic separation, and sequentially carrying out low-temperature embrittlement treatment and two-stage mechanical dissociation, a dissociation material obtained by separating the black powder, the current collector and the high-molecular binder is obtained; then, two-stage screening is adopted, fine black powder smaller than 50 micrometers is obtained through screening, the binder in the fine black powder is fused through pulse hot air and enters a hollow porous ceramic roller along with airflow, the fused binder is adsorbed to the outside of the roller through micropores of the porous ceramic roller according to the surface energy difference, and therefore the binder is removed and recycled; and finally, airflow separation is carried out, and a black powder product and current collector chippings are obtained through separation. According to the method, chemical pollution and high-temperature damage can be avoided, accurate separation of the black powder, the aluminum foil and the binder is efficiently achieved, and the purity of the black powder product is 99% or above.

The invention relates to a lithium battery positive electrode slurry, a positive electrode plate, a preparation method and an application, and belongs to the technical field of battery plate processing, the positive electrode slurry comprises a positive electrode active material, a conductive agent, a binder and a solvent; the solvent comprises an amide solvent and dichloromethane, and the mass ratio of the positive active material to the conductive agent to the binder is (70-80): (10-15): (10-15); the mass ratio of the dichloromethane in the solvent is 0.01%-0.5%. The positive electrode plate comprises a positive electrode current collector and a positive electrode coating layer, and the positive electrode coating layer is obtained by coating the surface of the positive electrode current collector with positive electrode slurry. The positive pole piece is applied to the lithium ion battery. The prepared positive electrode slurry is good in uniformity, the coating uniformity of a positive electrode piece is good, the peeling strength of an electrode is remarkably enhanced, and the performance is more excellent in an electrochemical performance test.

The utility model discloses a coating device. The coating equipment comprises a conveying device, a coating device and a base material separating device, the conveying device is used for conveying a current collector along a conveying path, the current collector comprises a first surface and a second surface which are arranged oppositely, the current collector is provided with a through hole penetrating through the first surface and the second surface, and a hole blocking base material for blocking the through hole is attached to the first surface; the coating device is located on the conveying path and used for applying slurry to the second surface so as to allow the slurry to fill the through hole; the base material separating device is located on the downstream of the coating device on the conveying path and used for separating the hole blocking base material and the current collector. Therefore, pollution and the like caused by the fact that slurry flows into the first surface are improved, the slurry can be limited in the through hole through the hole blocking base material so as to fill the through hole, the hole blocking base material and the current collector can be separated through the base material separation device, the separation difficulty of the hole blocking base material and the current collector is reduced, and the production efficiency of the battery pole piece is improved.

The invention relates to the technical field of battery electrodes, in particular to a zinc pole piece coated with a sulfonic COF membrane, a preparation method of the zinc pole piece and an aqueous zinc battery, and the preparation method comprises the following steps: dissolving 2, 4, 6-triformyl phloroglucinol and p-phenylenediamine-2, 5-disulfonic acid in an organic solvent to obtain a mixed solution; and putting the zinc foil into the mixed solution, carrying out sealed standing at normal temperature, taking out the zinc foil coated with the sulfonic group COF film, and washing and drying the zinc foil to obtain the zinc pole piece coated with the sulfonic group COF film. The prepared zinc pole piece coated with the sulfonic COF film has good corrosion resistance and dendritic crystal inhibition capacity, and when the zinc pole piece is used as a negative electrode of a water-based zinc battery, the cycle performance of the water-based zinc battery can be improved, and the cycle life of the water-based zinc battery can be prolonged; the problems that a zinc negative electrode of an existing water-based zinc battery is prone to generating dendritic crystal and corrosion passivation side reactions in the battery circulation process, so that the use performance of the water-based zinc battery is reduced, and the service life is greatly shortened are solved.

Thermoplastic compositions include: from about 35 wt% to about 70 wt% of a polymer resin, wherein the polymer resin comprises at least two polymer resins, wherein at least one of the polymer resins includes a high density polyethylene (HDPE) polymer having a degree of crystallinity of at least 47% as measured by differential scanning calorimetry (DSC); from about 10 wt% to about 40 wt% synthetic graphite; from about 5 wt% to about 15 wt% carbon nanotubes (CNTs); and from about 3 wt% to about 15 wt% conductive carbon black powder.

The invention relates to a method for in-situ observation of an alkali metal solid-state battery. The method comprises the following steps: S1, observing morphology and component changes of interface cross sections of a positive electrode, a negative electrode and an electrolyte of the alkali metal solid-state battery through a scanning electron microscope; and S2, carrying out structure evolution characterization on an interface of the positive electrode, the negative electrode and the electrolyte of the alkali metal solid-state battery through synchrotron radiation X-ray diffraction. According to the method for in-situ observation of the alkali metal solid-state battery, the scanning electron microscope is combined with the synchrotron radiation X-ray diffraction, so that the defect that a traditional in-situ characterization method is single is overcome, and morphology, morphology and morphology of an air-sensitive alkali metal solid-state battery electrode and an electrolyte contact interface under the conditions of different working currents, voltages and temperatures are realized. And comprehensive and accurate real-time characterization and analysis of components and structures are realized.

The utility model discloses a solar energy and gravity combined power generation and energy storage system, which comprises a solar power generation assembly, an inversion controller, an energy storage battery, a charging and discharging station, a generator, a gravity power generation assembly and a lifting motor, and is characterized in that the gravity power generation assembly comprises a lifting frame and a battery platform arranged on the lifting frame; according to the utility model, the gravity power generation assembly utilizes electric energy exceeding the energy storage upper limit of the energy storage battery to generate power at night through the gravity power generation assembly, so that the power generation efficiency is improved, and the power generation efficiency is improved. The utilization rate of energy can be improved; besides, through the charging and discharging movable contact structure and the charging and discharging fixed contact structure, the charging and discharging processes of the energy storage battery are carried out on the ground, the charging and discharging movable contact structure is connected with the electrodes of the energy storage battery, wiring of the movement section of the energy storage battery can be omitted, and safety is higher.

Described are electrodes for use in lithium-ion and lithium metal electrochemical cells, lithium-ion and lithium metal electrochemical cells, and methods of making the electrodes using a bidirectional freeze-casting process. The electrodes described herein include vertical lamellar structures that provide beneficial performance characteristics to the electrochemical cells incorporating the electrodes. The electrodes can be prepared using a slurry that includes a conductive additive, particles of active material, a binder, and a solvent, such as water. The bidirectional freeze-casting process can freeze the slurry to form the vertical lamellar structures as an active material layer on a surface of a current collector. The vertical lamellar structures can define interlamellar channels that facilitate decoupling of lithium-ion transport in interlamellar and intralamellar regions of the electrodes, thereby providing beneficial areal capacity and rate capability performance.

A method for preparing a carbon nanotube sodiophilic metal anode-free sodium metal battery electrode material is provided, and the method includes the following steps: the carbon nanotubes are modified by a dielectric barrier plasma device; the modified carbon nanotubes are mixed and stirred with a sodiophilic metal salt to obtain a precursor slurry; the precursor slurry is dried, placed in a tube furnace after drying, and heated by introducing a reducing gas to react, thereby obtaining a carbon nanotube sodiophilic metal anode-free sodium metal battery electrode material. The electrode material prepared by the method has a stable structure, excellent electrical conductivity, and excellent sodium affinity, and can be applied to anode-free sodium metal battery electrode materials. The entire preparation process is controllable, the synthesis cycle is short, and the operation is simple.

The utility model relates to the technical field of new energy batteries, in particular to a laser welding clamp for battery tabs, the laser welding clamp for the battery tabs comprises a press-fit assembly and a bearing base plate, the press-fit assembly comprises a dust collection block, the dust collection block is provided with a dust collection groove and a dust collection hole, the dust collection hole communicates with the dust collection groove, and the bearing base plate is arranged opposite to the press-fit assembly. According to the laser welding clamp for the battery electrode lug, the pressing assembly and the bearing base plate are matched to clamp and fix the battery electrode lug, dust generated in the welding process is sucked back through the dust suction grooves through the dust suction holes, and the problem that in the traditional laser welding process of the electrode lug, a large amount of dust is generated to pollute the environment is solved.

A cell for use in an electrochemical cell, that includes a positive electrode, a negative electrode, an electrolyte, and a separator in the form of a zeolite-based material comprising one or more naturally occurring or synthetically synthesized zeolites applied directly to at least one of the positive electrode and the negative electrode. The positive electrode configured so that non-reactive metal ions are reversibly extracted there from and inserted therein. The negative electrode configured to reversibly accept and release the non-reactive metal ions. The electrolyte positioned between and in contact with the negative electrode and the positive electrode, such that the electrolyte supports a reversible flow of the non-reactive metal ions between the positive electrode and the negative electrode. The separator being configured to electrically isolate the positive electrode from the negative electrode, while being permeable to the reversible flow of the non-reactive metal ions there through.

The invention relates to a battery pole piece winding tension control method and device and winding equipment. The method comprises the following steps: acquiring the diameter of a roller and the winding thickness of a pole piece wound on the roller; according to the rolling thickness, the initial rolling tension and the tension taper coefficient are determined; wherein the size relation between the winding thickness and the initial tension is a reverse relation, and the size relation between the winding thickness and the tension taper coefficient is a forward relation; according to the roller diameter, the winding thickness, the initial tension, the tension taper coefficient and a preset algorithm, the winding tension for winding the pole piece on the roller is determined; and controlling the winding of the pole piece according to the winding tension. According to the scheme, according to the universal control method suitable for pole piece winding, the good winding effect of different types of material rolls is achieved.

Various embodiments of the teachings herein include an apparatus for hyperspectral imaging of electrode webs during electrode manufacturing for battery cells. An example includes: a hyperspectral spectroscopy unit with a line scan camera for imaging, the spectroscopy unit configured: to capture hyperspectral images of the forward-moving electrode web at a predefined location of the electrode manufacturing, to ascertain inhomogeneities of the electrode web from the images, wherein an inhomogeneity is a deviation of the chemical composition of the layers or of the particle size distribution from predefined target variables, and to ascertain and save a local position of the inhomogeneities in the longitudinal direction of the electrode web; and a deflection roll over which the electrode web is guided. The line scan camera captures the images at the position of the contact surface between the deflection roll and the electrode web.

To obtain a battery module that can reduce the man hour of welding and stabilize bonding strength at welding between a bus bar and a plurality of electrode leads.SOLUTION: A battery module 11 includes a plurality of battery cells 20 stacked on each other, a bus bar 30 electrically connected to electrode leads 26 of the battery cells, a welding part 50 that, at an overlap part 30A where a plurality of end parts of the electrode leads are overlapped on the bus bar, bonds the end parts and the bus bar, and a heat input part 60 that is formed at a position overlapping with the welding part in at least one of the electrode lead and the bus bar, where the heat input property in a bonding direction is made higher than that in the other part.SELECTED DRAWING: Figure 5

The invention provides waterborne polyurethane resin and a porphyrin-based lithium-sulfur battery electrode binder prepared from the waterborne polyurethane resin, and particularly relates to high-molecular waterborne polyurethane resin with carboxyl in a molecular chain and a preparation method of the high-molecular waterborne polyurethane resin. The preparation method comprises the following steps: carrying out condensation polymerization reaction on 2, 2-dimethylolpropionic acid, N-methyldiethanolamine and diisocyanate which are used as raw materials to prepare an isocyanate-terminated prepolymer solution, and then sequentially carrying out salifying carboxyl neutralization, emulsification and chain extension to prepare the polyurethane prepolymer. The invention discloses a water-based binder for a lithium-sulfur battery electrode, which is prepared by in-situ crosslinking of the water-based polyurethane resin and porphyrin / metalloporphyrin and has electrocatalytic performance, and a preparation method of a sulfur electrode based on the water-based binder for the lithium-sulfur battery electrode. Compared with a commercial electrode binder, the aqueous binder for the lithium-sulfur battery electrode has higher initial discharge capacity, higher capacity retention ratio and lower charge-discharge voltage polarization, and a brand new thought and scheme are provided for developing a high-performance lithium-sulfur battery.

The invention provides a high-stability low-temperature proton battery as well as a preparation method and application thereof, and belongs to the technical field of proton batteries. According to the invention, vanadium hexacyanoferrate is used as a positive electrode material, a PTCDA / MXene composite material is used as a negative electrode material, and an acetic acid-phosphoric acid solution is used as an electrolyte to prepare the proton battery, so that the interface stability of the electrode material and the electrolyte is good, and meanwhile, active substances cannot fall off in a circulating process; the acetic acid-phosphoric acid electrolyte has relatively high decomposition voltage and excellent electrochemical stability, can stably work in a relatively wide voltage range, and reduces the problems of electrolyte decomposition and water evaporation, so that the safety and cycle performance of the battery are improved; the acetic acid-phosphoric acid electrolyte has relatively good conductivity under a low temperature condition, can maintain relatively stable battery performance in a cold environment, and improves the problem of battery capacity fading at a low temperature.

This nonaqueous secondary battery electrode includes a current collector layer, a conductive adhesive layer, and an electrode mixture layer in the stated order. The electrode mixture layer contains an electrode active material and a binder. The conductive adhesive layer includes a first adhesive layer provided on the collector layer, and a second adhesive layer that is provided so as to partially cover the first adhesive layer and that is in contact with the electrode mixture layer. The first adhesive layer contains conductive particles and a binder. The second adhesive layer contains conductive particles and a binder. The second adhesive layer contains the conductive particles at a proportion lower than the first adhesive layer, or the second adhesive layer contains a binder and does not contain conductive particles. A method for manufacturing a nonaqueous secondary battery electrode and a nonaqueous secondary battery are also provided.