37results about How to "Lower internal resistance" patented technology

The utility model relates to a kind of lithium iron phosphate starting power supply, and cell group includes multiple full tab low temperature lithium iron phosphate battery, and multiple full tab low temperature lithium iron phosphate battery is electrically connected battery management system after mutual series connection or parallel combination;PI heating film is attached to the outer surface of cell group, and PI heating film is closely attached with cell group by heat-conducting silica gel;PI heating film is electrically connected battery management system, for heating cell group under the control of battery management system;GPS positioning module is integrated in the outside of cell group, for obtaining the position information of lithium iron phosphate starting power supply and uploading to remote processing equipment;Cell group, battery management system, PI heating film and GPS positioning module are all set in insulating box body.The utility model reduces internal resistance by full tab low temperature battery structure, can still stable output current in low temperature environment, solves the problem of insufficient low temperature discharge capacity of traditional battery.

This application relates to the field of battery technology, and more particularly to a battery management component and battery pack. The battery management component includes a battery management module, which comprises: a BDU component, the BDU component including a housing and a relay module, the relay module being located within the housing; and a BMS slave board assembly, located above the BDU component along the height direction of the battery pack. The BMS slave board assembly includes a BMS cover and a slave circuit board, the BMS cover being disposed on the housing, and a cavity being formed between the BMS cover and the housing, with the slave circuit board located within the cavity. This application is beneficial for improving the energy density of the battery pack.

This invention relates to the field of lithium-ion battery manufacturing technology, specifically providing a full-tab battery cell for large cylindrical batteries, its preparation method, and applications. This invention innovatively employs a "winding-fixing-laser axial cutting-graded flattening" process flow, changing the traditional "cut-then-winding" process long used in the industry, achieving a breakthrough in the precision of tab forming. Specifically, after the bare cell is wound, the blank areas of each current collector layer have formed a stable stacked structure, which is precisely fixed using a special fixture and simultaneously cut along the axial direction by laser, completing the high-precision forming of multiple tabs in one step. This method fundamentally eliminates the problem of accumulated deviations caused by step-by-step operations in traditional winding processes, stably controlling the tab alignment accuracy within 0.1mm, effectively solving the long-standing problem of alignment consistency in existing technologies.

The application discloses a battery and a manufacturing method thereof, and the battery comprises a positive current collector layer, which is a composite structure with dense normal layers and porous functional layers alternately distributed formed on an aluminum foil substrate through electric field assisted selective etching, a positive electrode sheet coated with positive active material aluminum powder and subjected to formation treatment, and a top cover assembly and a bottom cover assembly connected with the positive and negative electrodes through full-tab cross-section laser welding and full-tab end face laser welding respectively; the manufacturing method comprises the steps of preparing a composite positive current collector layer, coating active material, assembling a battery cell, laser welding and packaging, etc. The specific surface area and ion transmission efficiency are greatly improved through the composite current collector layer structure, the internal resistance and temperature rise are reduced by combining the optimized full-tab welding process, so that the rate performance, cycle stability and thermal safety of the battery are significantly improved, and the battery is suitable for the manufacturing of high-power long-life batteries such as electric vehicles and energy storage systems.

This invention discloses a low-temperature negative electrode lead paste formulation and its preparation method. The raw materials are as follows by weight percentage: lead powder: 82%-88%, barium sulfate: 5%-12%, sodium lignosulfonate: 0.2%-1.0%, humic acid: 0.5%-1.0%, carbon black: 1%-2%, expanded graphite: 1%-2%, graphene: 0.5%-1.5%, and deionized water: balance. A mixture of spherical lead powder and flake lead powder (spherical powder accounting for 60%-70%) is used. The high specific surface area of ​​the spherical lead powder improves the wettability of the electrolyte, while the layered structure of the flake lead powder increases the porosity. The synergistic effect of these two materials increases the porosity of the negative electrode active material to 65%-70% (compared to approximately 55%-60% in traditional lead paste), accelerating the dissolution of lead sulfate and the diffusion of Pb²⁺.

This invention provides a composite anode material, its preparation method, and its application. The preparation method includes the following steps: mixing and lithiating graphene material and lithium metal material in a protective atmosphere to obtain lithiated graphene material; wherein both the graphene material and the lithium metal material are in particulate form; mixing the metal material and the lithiated graphene material and heating to obtain the composite anode material. The composite anode material obtained by the preparation method of this invention is a lithium alloyed graphene material, which can guide the uniform deposition of metallic lithium, reduce the probability of lithium dendrite formation, and provide more electron pathways, enhancing lithium diffusion, thereby reducing the gap between the anode material and the solid electrolyte, reducing battery impedance, and improving battery cycle performance and rate performance.

The application provides a double-coating lithium iron phosphate positive electrode sheet, a preparation method and application thereof. The preparation method comprises the following steps: mixing modified large-particle lithium iron phosphate, modified small-particle lithium iron phosphate, a conductive agent, a binder and a solvent to obtain a first slurry and a second slurry; adopting double-layer slot extrusion coating to coat the first slurry on the surface of a current collector and coat the second slurry on the surface of the first slurry; and drying and rolling to obtain the double-coating lithium iron phosphate positive electrode sheet; the modified large-particle lithium iron phosphate is doped with Ti and Nb, and the modified small-particle lithium iron phosphate is doped with Mg and Al. The application adopts a multi-element doped positive electrode material combined with a double-layer coating preparation method to avoid the shortcomings of LFP materials, improve the rate performance, high-temperature performance and cycle performance of LFP, and has the advantages of simple preparation process and easy industrial production. The prepared positive electrode material and the secondary battery using the same have excellent comprehensive performance, and have a wide application prospect in the field of power batteries.

The utility model discloses a device of carbon film's continuous deposition on metal surface through capacitive coupling plasma, contain vacuum chamber, oil diffusion pump, roots pump, mechanical pump, vacuum valve, vacuum pipeline, take off roll no.

This invention discloses a lithium-ion battery separator with a porous alumina-based composite material coating and its preparation method. The lithium-ion battery separator with the porous alumina-based composite material coating includes a base film and a coating on the base film. The coating includes modified porous alumina, which comprises porous alumina and lithium element supported on the porous alumina. The method for preparing the modified porous alumina includes: immersing the porous alumina in an aqueous solution of lithium salt, simultaneously stirring and sonicating under vacuum for 4-6 hours, drying, grinding into powder, and calcining at 400-600℃ for 2-4 hours under an inert gas atmosphere to obtain the modified porous alumina. The lithium-ion battery separator of this invention has high heat resistance, high wettability, and high ionic conductivity.

This invention discloses a composite expander and its application in the negative electrode plate of a lead-acid battery, belonging to the field of lead-acid battery technology. Ammonium persulfate is used as an oxidant, added to an ethanol solution mixture of pyrrole / aniline monomers (conductive monomers), sodium lignosulfonate, and acrylamide, causing an oxidation reaction. Subsequently, it is calcined at high temperature under a nitrogen or argon atmosphere to obtain a compound in which a composite polymer encapsulates sodium lignosulfonate. After calcination under a protective gas atmosphere, some of the composite material carbonizes, forming a carbon-encapsulated sodium lignosulfonate composite expander. The carbon-encapsulated composite expander can slow down the consumption of sodium lignosulfonate. Using the composite expander results in a higher hydrogen evolution overpotential and more durable low-temperature performance. The application of the composite expander in the negative electrode plate of a lead-acid battery improves the sulfation problem of the negative electrode plate operating under high efficiency partial charge conditions, extending the cycle life of the lead-acid battery.

The present application provides a sunlight-resistant colored electrochemical energy storage fabric based on recycled cotton powder and a preparation method thereof, belonging to the technical fields of flexible electronic textiles and electrochemical energy storage. The preparation method first deposits a TiO2 film on the recycled cotton powder by ALD technology, and then performs mild hydrothermal synthesis to obtain a TMOs@TiO2@CP composite powder with a three-layer nested structure. Among them, the TiO2 film protects the internal recycled cotton powder from erosion during the hydrothermal reaction and is tightly combined with the TMOs functional layer through Ti-O-TM covalent bonds, improving the structural stability and interfacial bonding force of the composite powder. The present application uses the inherent color characteristics of different transition metal oxides to replace traditional black carbon-based materials, endowing the energy storage fabric with rich color choices and meeting the aesthetic and design requirements of high-end textiles. The process route of the present application avoids the damage to the inherent flexibility and structure of cotton fabrics by drastic means such as high-temperature carbonization.

The present application relates to the technical field of new energy battery, in particular to a coated ternary material mixed with different particle sizes, a preparation method thereof and a battery; the preparation method comprises the following steps: mixing a nickel-cobalt-manganese precursor and a lithium salt, and then mixing the mixture with a gel solution to obtain a premix; mixing a metal oxide with the gel solution to obtain an oxide coating agent; mixing a carbon source with the gel solution to obtain a carbon coating agent; coating the oxide coating agent on the outside of the premix by using an electrospinning method to obtain an oxide-coated ternary material; coating the carbon coating agent on the outside of the premix by using an electrospinning method to obtain a carbon-coated ternary material; sintering the oxide-coated ternary material and the carbon-coated ternary material; mixing and sintering the sintered oxide-coated ternary material and the sintered carbon-coated ternary material; wherein the particle size of the oxide-coated ternary material is larger than that of the carbon-coated ternary material. The preparation method is simple, has fewer processes, and can shorten the preparation time.

This utility model discloses a large cylindrical lithium battery structure with a hard connection between the current collector and the terminal, relating to the technical field of cylindrical batteries. It includes a casing, inside which a core is connected. A positive current collector and a negative current collector are respectively connected to the upper and lower sides of the core. The positive and negative current collectors have a plurality of heat dissipation and ventilation holes arranged in a circular array. The center of the negative current collector has a flange, which is inserted into the terminal below the top cover assembly. This application divides the current collector into a positive and a negative current collector, and the terminal is directly welded to the flange at the center of the current collector, which is equivalent to the terminal being directly connected to the negative electrode of the core. This reduces the internal resistance of the cell and avoids heat generation, making it suitable for high-rate charge and discharge conditions. Compared with the original soft connection scheme, the "Z" folding process of the current collector can be omitted, significantly reducing the current collector area and greatly lowering the manufacturing cost of the large cylindrical lithium battery.

The application belongs to a two-flow evaporator, which is a one-piece welded structure, comprising two parallel flat tube groups, inlet / outlet header, intermediate header, fins and two guards; the two flat tube groups are inlet flow flat tube group and return flow flat tube group, fins are arranged between adjacent flat tubes, the two guards are arranged outside the flat tube groups, and the two ends are fixed with the inlet / outlet header and the intermediate header; the inlet / outlet header is provided with a first partition plate, which divides the inner cavity into an end inlet flow cavity and a liquid outlet cavity, which are respectively connected with the inlet flow flat tube group and the return flow flat tube group, and the tube body is provided with an air inlet and a liquid outlet hole at one end; the intermediate header is provided with a second partition plate, a third partition plate and an intermediate partition cover, which divide the inner cavity into a middle inlet liquid cavity and a middle return liquid cavity, which are respectively connected with the inlet flow flat tube group and the return flow flat tube group, and the refrigerant flows from both ends to the middle through the middle inlet liquid cavity, and flows into the middle return liquid cavity through the upper and lower space of the intermediate partition cover, so as to realize double-flow heat exchange. The application can significantly reduce the core resistance and improve the temperature uniformity.

The application relates to a preparation method of a lithium battery diaphragm and belongs to the technical field of lithium battery preparation. The method is as follows: epoxy resin, a diluent, a curing agent 1 and an oleophilic emulsifier are uniformly mixed to obtain dispersion liquid 1; an electrolyte solution is constantly dropped into the dispersion liquid 1, constant-temperature high-speed stirring is carried out, and a water-in-oil emulsion is obtained; under constant temperature, deionized water, a hydrophilic emulsifier and a curing agent 2 are uniformly mixed to obtain dispersion liquid 2; the water-in-oil emulsion is added into the dispersion liquid 2, high-speed emulsification is carried out, and a water-in-oil-in-water emulsion system is obtained; the water-in-oil-in-water emulsion system is subjected to temperature rising and curing; after curing, centrifugal separation, washing and drying are carried out, and a solid nanometer adhesive is obtained; the solid nanometer adhesive is ground, then is uniformly coated in a mold and is subjected to high-temperature treatment, and the lithium battery diaphragm is obtained. The electrolyte solution is selected as the inner water phase of the water-in-oil emulsion, the internal osmotic pressure of the emulsion can be increased, fusion between the emulsions can be prevented, and the particle size is increased.

This invention relates to the field of anode materials, specifically to an antimony-based anode material, its preparation method, and a lithium-ion battery. The method involves preparing Schiff base-functionalized carbon quantum dots by adding a phosphorus source, an antimony source, and the Schiff base-functionalized carbon quantum dots to a reaction solvent, followed by a solvothermal reaction. This antimony-based anode material achieves a synergistic improvement in high specific capacity, long cycle life, excellent rate performance, and high structural stability, making it a highly promising anode material for lithium batteries, particularly suitable for high-energy-density, long-life lithium-ion batteries.

The application provides a high-voltage sodium ion battery additive and an electrolyte thereof, and belongs to the field of sodium ion batteries, and comprises a nonaqueous organic solvent, a sodium salt and an electrolyte additive, the high-voltage sodium ion battery electrolyte is applied to a sodium ion battery with a maximum working voltage of 4.0V-4.3V, and the electrolyte additive is a 1H, 1H, 5H-octafluoropentyl-1, 1, 2, 2-tetrafluoroethyl ether compound. In the first charging process of the battery, the electrolyte additive participates in the introduction of F elements to form an inorganic positive electrode interface passivation film, blocks the direct contact between the electrolyte and the positive electrode surface, reduces the occurrence of side reactions between the cathode and the electrolyte, plays a role in protecting the cathode, improves the interface performance of the positive electrode material, effectively reduces the internal resistance of the battery, inhibits the capacity reduction, and can effectively improve the high-voltage cycle performance of the sodium ion battery.

This invention discloses a method for preparing lithium iron phosphate (LFP) materials, as well as the LFP materials and their applications, belonging to the field of LFP material technology. Addressing the problems of low volumetric energy density and high production costs associated with current LFP preparation methods, this invention provides a method for preparing LFP materials. Under co-precipitation and excess phosphorus source reaction conditions, a chelating agent is first used to chelate and inhibit grain growth to prepare nano-micron-sized hydrous ferrous phosphate salts. High-temperature decrystallization treatment is then used to form anhydrous ferrous phosphate with numerous defects. During calcination in a reducing atmosphere, high-performance LFP is synthesized through secondary phosphorus supplementation and the combined effects of sufficient lithium and carbon sources.

This invention relates to a nitrogen-phosphorus co-doped composite carbon nanotube catalyst, its in-situ growth preparation method, and its application. The in-situ growth preparation method includes the following steps: immersing a conductive nickel-containing substrate with a three-dimensional porous structure in a precursor solution containing both nitrogen and phosphorus elements; removing and drying the substrate; and then subjecting it to a calcination reaction in a flame under a combustible atmosphere. This causes the precursor to burn and decompose on the substrate surface, resulting in an in-situ reaction and growth of a three-dimensional network structure of nitrogen- and phosphorus-doped carbon nanotubes embedded with nickel nanoparticles. After cooling, the nitrogen-phosphorus co-doped composite carbon nanotube catalyst is obtained supported on the substrate. Compared with existing technologies, this invention enables the one-step, rapid, and inexpensive preparation of a non-precious metal catalyst with a highly conductive network, abundant active sites, and excellent stability on a conductive substrate, which can be directly used for efficient water electrolysis to produce hydrogen, thereby promoting its large-scale industrial application.

The invention discloses a cylindrical battery and a power utilization device, and belongs to the technical field of new energy materials. By adopting an in-situ polymerization technology, a compact and continuous quasi-solid electrolyte network is constructed in the cylindrical roll core, so that the safety pain points that a traditional liquid lithium ion battery is easy to leak and inflammable and explosive are fundamentally solved, and meanwhile, the technical bottlenecks that a solid-solid interface of a solid-state battery is poor in contact and large in impedance are overcome; according to the battery system, atomic-scale close contact of the electrolyte and the electrode particles is realized, the intrinsic safety and the energy density of the battery are remarkably improved while high ionic conductivity is ensured, and the battery system is particularly suitable for the power and energy storage fields with extremely high safety requirements.

This invention belongs to the field of secondary batteries, and provides a novel structural additive, a preparation method, a non-aqueous electrolyte containing the novel structural additive, and a secondary battery. The novel structural additive is a complex of an inner salt compound containing a hydrocarbon sulfonate anion and a quaternary ammonium cation with difluorophosphate, having the structure shown in Formula I: where R1 is a hydrocarbon-like group with 1-6 carbon atoms; R2 is a chain-like or cyclic quaternary ammonium cation; R3 and R4 are independently selected from one of , , , , or ; R5, R6, and R7 are independently selected from hydrocarbon groups or hydrocarbon oxygen groups; R8, R9, and R... 10 The elements are independently selected from hydroxyl groups; n=1~6, m=1~6, p=1~6, and n, m, and p are independent of each other; M is a metallic element selected from Li or Na. A non-aqueous electrolyte and a secondary battery containing this novel structural additive are provided, which can improve the battery's low-temperature discharge performance and high-temperature storage performance, and extend cycle life.

This invention relates to a rapid drying method, apparatus, and sodium-ion battery for Prussian blue analogue sodium-ion battery electrodes, belonging to the field of sodium-ion battery manufacturing technology. The rapid drying method includes the following steps: S1: Preparing the wet electrode sheet and feeding it into a drying chamber for drying; S2: Transferring it to an internally heated dehydration section for gradient temperature dehydration; S3: Transferring it to an instantaneous high-temperature dehydration section for instantaneous high-temperature dehydration; S4: Transferring it to a heat-preserving dehydration section for further deep dehydration; S5: Cooling the electrode sheet after step S4 to obtain a dried electrode sheet. This drying method has the advantages of being rapid and low-cost, and can minimize structural damage to the Prussian blue analogue material.

This invention provides a gel polymer electrolyte, its preparation method, and a semi-solid-state lithium-ion battery. The preparation method includes: step S1, mixing a lithium salt with a solvent to obtain a lithium salt solution; step S2, mixing the lithium salt solution, a polymeric monomer, and an initiator and carrying out a polymerization reaction to obtain the gel polymer electrolyte; wherein the polymeric monomer has the structure shown in formula (I). The gel polymer electrolyte obtained in this application exhibits superior flame retardancy, thermal stability, ionic conductivity, and lower interfacial impedance.

This invention relates to the field of scraper cleaning technology, specifically to a scraper cleaning device and a processing equipment for electrode welding grooves. It includes a liquid inlet assembly, a negative pressure assembly, and a drive unit. The liquid inlet assembly includes a liquid inlet body with a liquid inlet channel. The negative pressure assembly includes a negative pressure body and a scraper. The negative pressure body is movably connected to the liquid inlet body, and a negative pressure chamber is formed within the negative pressure body. The scraper is embedded in the negative pressure body and communicates with the negative pressure chamber, with a portion of the scraper extending out from the negative pressure body. The drive unit is connected to the negative pressure body and drives the negative pressure body to reciprocate on the liquid inlet body, thereby switching the scraper between a working position and a cleaning position. When the scraper is in the cleaning position, the cleaning fluid in the liquid inlet channel flows along the working surface of the scraper to the negative pressure chamber to clean the accumulated material inside the scraper. This significantly improves production continuity, accurately flushes the accumulated material inside the scraper, ensures the cleanliness and geometric consistency of the electrode welding groove, and improves the welding quality and electrical performance of lithium batteries.

The present disclosure provides a low-internal-resistance ceramic-coated separator, a preparation method thereof, and a lithium battery. The low-internal-resistance ceramic-coated separator of the present disclosure includes a polymer base film, and a ceramic layer coated on one or two sides of the polymer base film. The ceramic layer adopts low-sodium boehmite and does not contain sodium carboxymethyl cellulose (CMC). A sodium content of the ceramic layer is less than 1000 ppm, so that a Gurley increase value of the separator is significantly lowered. When applied to the lithium battery, the ceramic layer can greatly reduce an internal resistance of a cell, thereby improving the power performance and discharge efficiency of the battery.

This invention discloses a lead-acid automotive starting battery with a carbon-coated negative electrode separator and its preparation method, belonging to the field of automotive lead-acid battery technology. By applying a conductive carbon material coating to the surface of the separator, the separator is tightly attached to the negative electrode active material, forming a porous conductive layer that balances conductivity and porosity. During charging, this effectively guides electron conduction and uniformly distributes the electrolyte, solving the problems of sulfate precipitation and reduced charge acceptance in traditional lead-acid batteries at low charging rates or in partially charged states, thus improving the battery's charging efficiency and cycle life.

This invention belongs to the field of capacitor technology and discloses a composite activated carbon, its preparation method, and its application. The composite activated carbon comprises activated carbon and graphene generated in situ. When the composite activated carbon of this invention is used to prepare supercapacitor electrodes, the prepared electrodes have high specific capacitance and high volumetric specific capacitance.

This invention discloses an aqueous binder for lithium-ion battery cathodes, its preparation method, and its application, belonging to the field of lithium-ion battery material technology. The binder raw materials, by weight, include: 40-90 parts acrylonitrile, 10-60 parts acrylate monomers, 0.01-1 parts functional monomers, 0.2-1 parts emulsifier, and 0.2-1 parts initiator. The functional monomers contain specific functional groups such as hydroxyl and amide groups. The preparation method involves dispersing the monomers in water under inert gas protection, polymerizing with an initiator, demulsifying, filtering, and drying. The preparation process is environmentally friendly and cost-controllable. This binder is fluorine-free and can complex with metal ions in the cathode active material to form a protective layer. It also constructs a dynamic reversible structure through multiple hydrogen bonds, effectively improving the impedance, lithium plating, and cycle performance of high-voltage battery systems, and suppressing gas expansion. Its application in cathode sheets and lithium-ion batteries solves problems such as poor environmental compliance of traditional PVDF containing fluorine and high electrolyte absorption by acrylonitrile copolymers.

This invention discloses a high-power battery integrating a radioactive structure and a multi-element corrosion-resistant alloy, belonging to the field of lead-acid battery technology. It constructs a core component integrating a radioactive grid structure and a multi-element corrosion-resistant alloy. The radioactive grid adopts a centrally radiating structure, with 8-12 variable cross-section radial grid bars and 3-4 rings of progressively spaced annular grid bars forming a closed conductive network. The multi-element alloy is composed of Pb 98.5%-99.2%, Sn 0.3%-0.8%, Ag 0.05%-0.1%, Ca 0.06%-0.12%, and Al 0.03%-0.05%, with precise matching between composition and structure. The battery is manufactured through medium-frequency induction melting, controlled-cooling grid forming, stepped heat treatment, and optimized assembly processes. The battery has a C10 capacity of not less than 100Ah, a P15min discharge time of not less than 15min, a cycle life of not less than 780 cycles, a grid corrosion rate of not more than 0.023mm / a, and an energy utilization rate of not less than 87%. This design overcomes the performance bottleneck of traditional grid-alloy separation designs, combining high power, long lifespan, and high stability.

This application relates to the field of limiting device technology, and discloses a limiter and a vehicle having the same. The limiter provided in this application is used to limit the distance between a fixed component and a moving component, and includes a first limiting shaft and a limiting housing. The first limiting shaft is connected to the fixed component; the limiting housing has a limiting hole that extends through the limiting housing along its length; one end of the first limiting shaft, axially away from the fixed component, is movably inserted into the limiting hole; the limiting housing is connected to the moving component; wherein, a magnet is provided on the first limiting shaft, and a coil is provided on the limiting housing. According to the limiter of this application, while realizing the movement of the moving component relative to the fixed component, the noise and internal resistance of the limiter are significantly reduced, and the working efficiency of the limiter is improved.