145results about How to "Lower internal resistance" patented technology

The present application provides an electrode plate, an electrode assembly, and a secondary battery. An electrode plate includes a current collector, an active material layer arranged on one surface of the current collector, and an electrical connection member electrically connected to the current collector. The active material layer is arranged on a main body portion of the current collector, the electrical connection member and the current collector are connected to each other by welding at an edge of the current collector, the welding connection region is referred to as a transfer welding region, and the current collector includes a support layer and an electrically conductive layer arranged on one surface of the support layer. The electrode plate further includes a first insulation layer arranged on a further surface of the current collector and covering at least the entirety of the transfer welding region when viewed in a thickness direction of the electrode plate. According to the present application, it is possible to improve the safety performance of the secondary battery and reduce an internal resistance of the secondary battery.

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.

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.

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 invention provides a composite positive plate, a preparation method thereof and a battery, and belongs to the technical field of batteries. The interface conductive layer is arranged on at least one side of the positive electrode active material layer, and the interface conductive layer comprises conductive filler and an elastic matrix. According to the composite positive plate, the interface conductive layer with conductivity, flexibility and elasticity is arranged on at least one side of the positive active material layer, so that when the composite positive plate is applied to the battery and the interface conductive layer is close to one side of the diaphragm, not only can the interface impedance be reduced, but also the wettability of electrolyte on the positive active material layer can be improved; when the interface conducting layer is close to one side of the shell, the positive electrode active material layer can be better protected, extrusion damage of the shell to the positive electrode active material layer is reduced, the interface conducting layer can serve as a current collector, the electrochemical performance of the battery is improved, and the interface conducting layer can adapt to volume expansion of the composite positive plate in the charging and discharging process of the battery and improve the cycle performance of the battery.

The invention discloses efficient closed-pore high-stability slurry and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the technical field of lithium batteries, the efficient closed-pore high-stability slurry comprises water, core-shell microspheres, a heat stabilizer, a wetting auxiliary agent and a dispersing auxiliary agent, the core-shell microspheres comprise first core-shell particles and second core-shell particles, the core of the first core-shell particle is a mixture of a heat conducting agent and a flame retardant, or a composition of any one or more of the heat conducting agents, and the shell of the first core-shell particle is a mixture of a thermosensitive accelerator and a thermosensitive main agent, or a composition of any one or more of the thermosensitive accelerators; the core of the second core-shell particle is a mixture of a heat conducting agent and a flame retardant, or a composition of any one or more of the flame retardants, and the shell of the second core-shell particle is a mixture of a thermosensitive accelerator and a thermosensitive main agent, or a composition of any one or more of the thermosensitive main agents. The material has the advantages of early quick and synchronous response to temperature change, excellent thermal stability and excellent flame retardancy.

The utility model provides a cover plate and a battery, and relates to the technical field of batteries. The cover plate comprises a pole and an electric connecting piece, the pole is provided with a first placement hole, and the first placement hole extends along a preset direction; the electric connecting piece comprises a first connecting part and a second connecting part, the first connecting part is arranged in the first placement hole and connected with the hole wall of the first placement hole, the second connecting part is located outside the first placement hole and connected with the pole, and the first connecting part is used for being connected with a tab. Therefore, the tab of the pole group can extend into the first mounting hole to be connected with the first connecting part, so that the current of the pole group can be directly led out through the electric connecting piece, the flowing path of the current is shortened, and the internal resistance of the battery is reduced.

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 discloses an electrode assembly, a battery, a battery pack including the same, and an automobile. The electrode assembly defines a core and an outer peripheral surface by winding around an axis with a first electrode, a second electrode, and a separator membrane between them. The electrode assembly is characterized in that the first electrode includes an uncoated portion at its long side end that exposes to the outside of the separator membrane along the winding axis direction of the electrode assembly. A portion of the uncoated portion is bent in the radial direction of the electrode assembly to form a bent surface region comprising overlapping layers of the uncoated portion. In a portion of the bent surface region, the number of layers of the uncoated portion in the winding axis direction of the electrode assembly is 10 or more.

A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The negative electrode includes: a negative electrode current collector including a carbon layer and a silicon layer, the carbon layer including a first porous substrate and a carbon-based material present inside the first porous substrate, and the silicon layer including a second porous substrate and a silicon-based negative electrode active material present inside the second porous substrate; and a negative electrode active material layer disposed on a surface of the negative electrode current collector and including a negative electrode active material.

The present invention relates to: [1] a nonaqueous electrolytic solution comprising a compound (A) represented by formula (I); and [2] a nonaqueous electrolytic solution battery comprising a positive electrode, a negative electrode, and the nonaqueous electrolytic solution.

This invention belongs to the field of lithium battery material technology, specifically relating to a metal oxide / mesoporous manganese dioxide / conductive polymer composite material, its preparation method, and its application. The preparation method includes the following steps: 1) ball milling a commercial metal oxide; 2) mixing the metal oxide powder with an organic polymer monomer and a methyl orange solution and ultrasonically dispersing the mixture to obtain a liquid mixture; 3) adding a potassium permanganate solution to the liquid mixture and performing a high-pressure hydrothermal reaction under stirring to obtain the composite material; 4) subjecting the composite material to alkali treatment, filtering, washing with water, and drying to obtain the metal oxide / mesoporous manganese dioxide / conductive polymer composite material. This metal oxide / mesoporous manganese dioxide / conductive polymer composite material can be used to prepare lithium battery cathode materials with high specific capacity, high conductivity, and high stability in a simple, efficient, and low-cost manner. It is easy to industrialize and solves the problems of low conductivity and poor rate discharge performance of traditional metal oxide cathode materials.

This invention provides a modified aqueous negative electrode, its preparation method, and its application. The modified aqueous negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed on the surface of the current collector. The negative electrode active material layer includes a negative electrode active material, a conductive agent, sodium alginate, waterborne polyurethane, and a pore-forming agent. The modified aqueous negative electrode of this invention solves both the raw material shortage problem of oil-based negative electrode formulations and the pain points of current aqueous negative electrode formulations, improving the slurry solids content, electrode porosity, and flexibility, while reducing electrode resistivity. Furthermore, this formulation is environmentally friendly, requiring no control of ambient humidity, and can significantly reduce production costs.

The present invention relates to a graphene material. Disclosed are a graphene powder and its preparation method and application. The graphene powder is a stack of graphene sheets. The graphene powder involves in its Raman spectrum a D peak and a G peak with peak heights of ID and IG respectively, where ID / IG is 0.10 or less. The graphene powder in accordance with the present disclosure can be applied in conductive composite materials, anti-corrosion coatings, heat dissipation composite materials. In particular, when used in lithium-ion batteries, it can significantly reduce electrode internal resistance and improve battery stability at any current rates.

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 utility model relates to a battery field discloses a kind of battery, battery module and battery pack. Battery includes shell and electric core component, electric core component is set in shell, and electric core component includes pole group and insulating film of wrapping pole group;Wherein, the inside width of shell along width direction is T;The inside width of insulating film along width direction is M, and the outside width is t;In the state that pole group is not wrapped insulating film, the width of pole group along width direction is m;Satisfy, 89.5%≤t / T≤92.5%, -1mm≤(M-m) / 2≤2mm. The utility model can improve assembly efficiency, and can improve security and volumetric energy density.

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 lead-out terminal structure and a secondary battery, belonging to the field of secondary battery technology. It aims to solve the problems of complex manufacturing processes, poor welding reliability, insufficient sealing, uneven stress, and high internal resistance in existing secondary batteries. The lead-out terminal structure includes a battery casing and a lead-out terminal assembly disposed on its lead-out holes. The lead-out terminal assembly consists of an upper electrode post, a lower electrode post, an upper sealing gasket, a lower sealing gasket, and a positive current collector. The upper electrode post has a concave center forming a recessed portion, with a welding hole at the bottom of the recessed portion. The lower electrode post is a circular plate, fixedly connected to the bottom of the recessed portion. The upper and lower sealing gaskets are respectively disposed on the inner and outer sides of the battery casing, and are pressed together by matching sealing bevels to form a continuous sealing surface. The upper surface of the positive current collector has a protrusion and is welded to the lower electrode post. This invention simplifies the manufacturing process, reduces costs, improves welding stability, sealing, and stress uniformity. Even if defects such as weld spatter occur during the welding process, it does not affect the battery's sealing performance, reduces the battery's internal resistance, and is suitable for various types of secondary batteries.

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 relates to battery technical field discloses circuit board, battery and terminal equipment, and circuit board includes: board body, first connecting assembly and second connecting assembly, board body includes main body and staggered arrangement at least one first extension and second extension of main body, first extension and second extension are arranged in any one side of main body respectively, and first extension and second extension can all fold towards main body, first connecting assembly sets up in first extension, second connecting assembly sets up in second extension, the utility model adopts the extension of board body to bear first connecting assembly and second connecting assembly, can spare more cloth piece arrangement space for main body, in addition, since first extension and second extension can fold towards main body and staggered arrangement, both can avoid the interference of extension when folding, simultaneously also can avoid the circuit of first connecting assembly and second connecting assembly on the same plane forms the overlap.

The application discloses a mobile charging robot, and relates to the technical field of charging management, and aims to solve the technical problems of the existing mobile charging robot, that is, the overall output capacity of the battery pack is reduced, the charging speed is limited, and there are safety hazards due to the inconsistency of the health state when the mobile charging robot performs high-power fast charging service, and the mobile charging robot comprises a mobile charging robot body and a thermal management system integrated in the mobile charging robot body; the mobile charging robot body comprises a chassis, a driving system arranged on the chassis, a charging control unit for being connected with an electric vehicle, and a control system; the thermal management system comprises a battery pack comprising a plurality of battery units and used for storing electric energy; the application fundamentally solves the problems of the limited output capacity and safety hazards of the mobile charging robot in the fast charging process due to the inconsistency of the battery pack by introducing the differential two-way thermal management based on the health state of the battery unit.

This application relates to a method and application for determining the amount of conductive agent in each layer of a multilayer coated electrode. The method includes the following steps: determining the optimal amount of conductive agent in a single-layer coated electrode with m different areal densities, wherein the single-layer coated electrode includes a single active material layer; based on the optimal amount of conductive agent in the single-layer coated electrode with different areal densities, constructing a fitting curve between the optimal amount of conductive agent in the single-layer coated electrode and the areal density of the single-layer coated electrode, obtaining a functional relationship with areal density as the independent variable G and conductive agent amount as the dependent variable B; for each active material layer in the multilayer coated electrode, the sum of the areal densities of the active material layer and all active material layers located on the surface of the active material layer away from the current collector is used as the independent variable G in the functional relationship, and the obtained dependent variable B is used as the amount of conductive agent in the active material layer. This achieves precise quantification of the amount of conductive agent in each layer of the multilayer coated electrode.

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 utility model relates to battery technology field, concretely provides a kind of battery pole piece and battery.The battery pole piece includes current collector and active material layer.Active material layer is arranged on at least one side surface in the thickness direction of current collector, and active material layer includes multiple coating layers stacked along the thickness direction.Coating layer is provided with blind hole on at least one side surface of current collector, and the orifice of blind hole is arranged on the surface away from current collector in the thickness direction of active material layer, and blind hole is through the contact interface of adjacent coating layers in the thickness direction.Blind hole is provided with filling layer inside.The utility model sets up blind hole and filling layer, solves the problem that the interface bonding force of different coating layers in multilayer coated active material layer is low, and ion transmission efficiency is low.Improve the problem that active material layer coating is thicker and prolongs the transmission distance of ion and electron, leads to dynamics slow, internal resistance increases and polarization exacerbates.

An electricity storage device (10) includes a first electrode (21) having a first current collector, a second electrode (22) having a second current collector, and a separator (23). The first electrode (21), the second electrode (22), and the separator (23) constitute a cylindrical winding body (20). The electricity storage device (10) further includes a cylindrical body (32, 61) covering an outer periphery of the cylindrical winding body (20) and having a first opening (31), a sealing body (40) sealing the first opening (31), and at least one first tab (21a) having one end connected to the first current collector and the other end connected to the sealing body (40). The sealing body (40) includes a first member (41) having a first surface (41a) facing a side opposite to the cylindrical winding body (20), and a second member (42) having a second surface (42a) facing the side of the cylindrical winding body (20). The other end of the first tab (21a) is welded to the first surface (41a) of the first member (41) to form a first welded portion (43), and the first welded portion (43) is located between the first surface (41a) and the second surface (42a). Thus, the internal resistance of the electricity storage device (10) can be reduced.

The invention discloses a halide solid electrolyte with electrochemical activity and a preparation method and application thereof, the solid electrolyte is a zirconium-doped ferric lithium chloride solid electrolyte, the chemical general formula of the solid electrolyte is LiFe1-4x / 3MxCl4, M is a metal element with the valence state higher than + 3, 0 lt; xlt; 1. According to the halide solid-state electrolyte with the electrochemical activity, the ionic conductivity order of magnitude is improved, the room-temperature ionic conductivity is improved to 10 <-3 > S / cm from 10 <-6 > S / cm by three orders of magnitude, so that the material is changed from'unavailability 'to'high performance', and the application requirement of an all-solid-state battery is met.