711results about "Non-aqueous electrolyte accumulators" patented technology

A positive electrode plate includes a positive electrode current collector and a positive electrode active material layer disposed on at least one surface of the positive electrode current collector, where the positive electrode active material layer includes two respective positive electrode active materials represented by chemical formula (1) and chemical formula (2): Li1+xNaaCo1+yAlzMgpTiuMvO2+w (1), where in chemical formula (1), M includes at least one of Zr, La, or Y, −0.1<x<0.1, 0<a<0.005, −0.05<y<0.05, 0.01<z<0.05, 0.001<p<0.01, 0<u<0.005, 0<v<0.005, and −0.05<w<0.05; and Li2+rNasN1+qO2+t (2), where in chemical formula (2), −0.2<r<0.2, 0≤s≤0.05, −0.1<q<0.1, −0.05<t<0.05, and N includes at least one of Ni, Cu, Mn, Fe, or Co. Such a positive electrode plate can achieve a high specific discharge capacity of the electrochemical apparatus, thereby increasing high-temperature cycling performance and energy density of the electrochemical apparatus.

The invention relates to a composite positive active material and a preparation method thereof, a positive pole piece and a secondary battery. The composite positive electrode active material comprises a positive electrode active material substrate, a porous metal oxide coating layer arranged on the surface of the positive electrode active material substrate and a conductive polymer coating layer arranged on the surface of the porous metal oxide coating layer. In the composite positive electrode active material, the electrochemical inert porous metal oxide coating layer has good thermal stability and is beneficial to stabilization of a crystal structure and inhibition of surface side reaction, and in addition, the porous structure is beneficial to transmission of lithium ions and storage of oxygen free radicals separated out due to structural collapse of a positive electrode active material matrix in the overcharge process; severe reaction with electrolyte is relieved, and overcharge failure of the positive electrode active material is slowed down. The conductive polymer coating layer can make up the electrochemical inertness of the metal oxide and improve the electronic conductivity of the positive electrode active material.

The invention provides a battery monomer, a battery device, a power utilization device and an energy storage device. The size of the positive electrode active material layer in the length direction of the electrode assembly is 300 mm to 950 mm; in the length direction of the electrode assembly, the difference value between the size of the negative electrode active material layer and the size of the positive electrode active material layer is OH1, and OH1 is larger than 1 mm and smaller than 5 mm; in the width direction of the electrode assembly, the difference value between the size of the negative electrode active material layer and the size of the positive electrode active material layer is OH2, and OH2 is larger than 1 mm and smaller than or equal to 4 mm; based on the total mass of the electrolyte, the mass ratio of the carboxylic ester solvent is 8%-57%, and the mass ratio of the fluorine-containing sulfimide lithium salt is 3%-8%. The battery monomer gives consideration to improvement of energy density, fast charge performance, cycle stability under fast charge and safety performance, and comprehensive improvement of battery performance is realized.

The invention provides a preparation method and application of a petroleum asphalt-based porous carbon material, and belongs to the technical field of porous carbon materials. The preparation method comprises the following steps: by taking petroleum asphalt as a carbon precursor, stirring and pre-oxidizing the petroleum asphalt and molten salt at a certain temperature, then pre-carbonizing, washing away the molten salt, and carbonizing with KOH to prepare the petroleum asphalt-based porous carbon material. The petroleum asphalt with low carbon yield (11%) is converted into the petroleum asphalt-based porous carbon material with obviously improved carbon yield (up to 30%) through an efficient and convenient method. When the petroleum asphalt-based porous carbon material prepared by the method provided by the invention is used as an electrode material of a lithium ion battery / zinc ion capacitor, the petroleum asphalt-based porous carbon material shows excellent electrochemical performance.

The present invention discloses a ceramic coated diaphragm and a preparation method thereof, and a secondary battery. The ceramic coated diaphragm comprises a substrate layer and a ceramic coating, wherein the ceramic coating comprises ceramic particles, a binder polymer and an organic high molecular polymer. Under hot pressing conditions of a temperature of 90°C and a pressure of 4MPa, an organic film is formed on the surface of the ceramic coating after hot pressing, wherein the coverage of the organic film is 0-5%, the value-added permeability per unit coating thickness after hot pressing is 0-15s / 100cc, and the peel strength after hot pressing is above 20gf / 15mm. The separator designed by the present invention still has high peel strength and ion permeability after hot pressing, the internal resistance of the battery is reduced, and the cycle and capacity are correspondingly improved.

The embodiment of the invention provides a sodium battery positive electrode material as well as a preparation method, a precursor and application thereof. The sodium battery positive electrode material comprises a sodium-based metal oxide, an X-ray diffraction spectrum of the material comprises diffraction peaks of the following 12 crystal faces: (003), (006), (101), (012), (104), (107), (018), (110), (113), (1010), (116) and (024), and the ratio of the peak area of the diffraction peak of the crystal face (003) to the sum of the peak areas of the diffraction peaks of the 12 crystal faces is less than 25%. The positive electrode material meeting the conditions is high in particle sphericity degree and relatively round and full in structure, so that the material is relatively high in compaction density and relatively good in dynamic performance, and the energy density and the rate capability of the sodium battery are conveniently improved.

Provided are a secondary battery, an electrolyte and an electric device. The secondary battery comprises a positive electrode sheet, an electrolyte, a separator and a negative electrode current collector, wherein the electrolyte comprises a non-aqueous solvent, an electrolyte salt and an additive, the non-aqueous solvent comprises an ether organic solvent, the additive comprises a first additive, and the first additive comprises one or more of a phosphite ester additive or a borate additive.

The invention discloses a pole piece lamination deviation rectification method and system, and relates to the technical field of energy storage batteries, and the method comprises the steps: S100, obtaining the position of a lamination table, and determining the preset standard position of a pole piece on a deviation rectification table; s200, acquiring a preset distance between the range finder and the pole piece at the preset standard position of the pole piece; s300, the actual distance between the distance measuring instrument and the pole piece arranged on the deviation correcting table is obtained; s400, according to the actual distance and the preset distance, the deviation rectifying table is driven to move so that the pole piece can move till the distance between the pole piece and the distance meter is equal to the preset distance; and S500, executing a pole piece lamination process. The preset standard position and the actual position of the pole piece on the deviation rectifying table are obtained through the distance measuring instrument, the deviation rectifying table is directly moved, so that the pole piece reaches the required lamination position, the edge grabbing error of the pole piece is avoided, the lamination effect is better, the accuracy is higher, and the pole pieces of various specifications can be effectively laminated.

A rechargeable battery is disclosed. The rechargeable battery comprises an anode, a cathode comprising a lithium-ion intercalation host, and an electrolyte comprising a solvent and a halogen-containing compound acting as an active cathode conversion material, wherein the electrolyte is in contact with the anode and the cathode.

An electrolyte for secondary battery, a secondary battery including the electrolyte, a battery module including the secondary battery, a battery pack including the secondary battery, and an electric apparatus including the secondary battery. The electrolyte for secondary battery includes an ester solvent and an additive, where the additive includes one or more of an ionic liquid additive, an amide compound additive, an inert cation additive, and an alloy additive.

A cathode for a lithium secondary battery according to exemplary embodiments may include a cathode current collector; and a cathode active material layer formed on the cathode current collector and including over-lithiated oxide particles. A D value represented by Equation 1 of the cathode may be greater than 5.

An electrolyte for sodium ion batteries can comprise a salt comprising one or more of sodium bis (fluoro sulfonyl) imide (NaFSI) salt, NaOTf, NaTFSI, NaBF4, NaPFe, and NaCICh, and an electrolyte solvent comprising at least one carboxylate ester as a dominant solvent. A sodium ion battery cell (100) can comprise the electrolyte (140) having a salt comprising one or more of NaFSI salt, NaOTf, NaTFSI, NaBF4, NaPFe, and NaC104, and an electrolyte solvent comprising at least one carboxylate ester as a dominant solvent. The battery cell (100) can also include an anode (130) in electrical contact with the electrolyte (140) and a cathode (150) in electrical contact with the electrolyte (140). A casing (120) can enclose the electrolyte (140), the anode (130), and the cathode (150) sufficient to prevent oxygen and moisture from entering the casing (120).

In a control device for an electric vehicle, a setting unit sets, as a maximum value of power capable of being charged into the battery, a short time SOP applied during charging in which a charging time is equal to or less than a predetermined time and a long time SOP applied during charging in which the charging time exceeds the predetermined time. A calculation unit calculates a regeneration SOP corresponding to a maximum value of regeneration power from the motor based on the short time SOP and the long time SOP. A control unit controls the regeneration power from the motor in a range equal to or less than the regeneration SOP. The calculation unit gradually changes the regeneration SOP from the short time SOP to the long time SOP in accordance with a duration time of the regeneration power generation.

A battery (1100), a battery cell (10), and an electric device. The battery comprises a battery unit (1) and a sampling assembly (2). The battery unit (1) comprises a plurality of columns of battery cells (10) arranged in a first direction, and each column of battery cells (10) comprises a plurality of battery cells (10) arranged in a second direction. Each battery cell (10) is provided with a pressure relief mechanism (12), electrode terminals (13), and a first side wall (1111) in a third direction, and the electrode terminals (13) comprise a first electrode terminal (131) and a second electrode terminal (132) having different polarities. The first electrode terminal (131), the second electrode terminal (132), and the pressure relief mechanism (12) are arranged at intervals on the first side wall (1111) in the first direction, and the second electrode terminal (132) is located between the first electrode terminal (131) and the pressure relief mechanism (12); or the first electrode terminal (131) and the second electrode terminal (132) are spaced apart from each other on the first side wall (1111) in the first direction, and the pressure relief mechanism (12) is arranged on another side wall of the battery cell (10), wherein the first direction intersects with the second direction, and a third direction is perpendicular to the first direction and the second direction. The sampling assembly (2) comprises electrical connection members (21) and sampling members (22) used for being electrically connected to the electrical connection members (21), the electrode terminals (13) of two adjacent battery cells (10) are connected by means of the electrical connection members (21), and a sampling member (22) is provided between the electrode terminals (13) of every two adjacent columns of battery cells (10).

Novel electrolyte compositions for lithium ion energy storage devices with silicon-based electrode materials have improved stability. The electrolyte composition may be used in an energy storage device that includes a first electrode and a second electrode, where at least one of the first electrode and the second electrode is a silicon-based electrode; a separator between the first electrode and the second electrode; and the electrolyte composition.

The purpose of the present disclosure is to provide: a composition for a fluoride-ion solid-state battery capable of improving battery capacity; and a fluoride-ion solid-state battery in which the same is used. The present disclosure is a composition for a fluoride-ion solid-state battery, said composition containing: a fluoride-ion conductive solid electrolyte and / or an active material for a fluoride-ion solid-state battery; and a fluoropolyether compound and / or a silicone compound.

The invention provides a diaphragm, a battery and an electric device, and aims to solve the technical problem that ion transmission on the diaphragm is easily blocked. The separator comprises: a base film; the metal organic framework layer is arranged on the base film, and the metal organic framework layer comprises a metal organic framework compound modified with dissociable groups. The metal-organic framework layer is further compounded on the basis of the base membrane, the metal-organic framework layer contains the metal-organic framework compound, and the metal-organic framework compound is a porous material and has the characteristics of high specific surface area and high porosity, so that the diaphragm is favorably infiltrated by electrolyte, and further, the performance of the diaphragm is improved. The metal organic framework compound is modified with the dissociable group, the dissociable group is easy to repel anions in the electrolyte, meanwhile, ion migration in the electrolyte is promoted through the ion-dipole effect, and the problem that ion transmission in the diaphragm is easy to block is solved, so that the internal resistance of the battery can be reduced, the cycle life of the battery is prolonged, and the rate capability of the battery is improved.

The invention provides a preparation method of an SA / GO / metal ion functional coating diaphragm suitable for a chloride ion battery, which comprises the following steps: mixing SA (sodium alginate) and GO (graphene oxide) aqueous solution, grinding into gel, and uniformly coating the gel on the diaphragm; then, the diaphragm is sequentially put into an ethanol solution containing metal salt and absolute ethyl alcohol to be soaked; and finally, vacuum drying is performed to prepare the SA / GO / metal ion functional coating diaphragm. By introducing the sodium alginate, on one hand, the sodium alginate is crosslinked with the graphene oxide to construct a better network structure, so that an excellent effect can still be ensured while the dosage of the sodium alginate is reduced; on the other hand, carboxyl and hydroxyl on the sodium alginate can be cross-linked with multivalent metal ions to form a film layer capable of effectively preventing ions from passing through so as to prevent loss of active substances, and meanwhile, rich oxygen-containing functional groups can capture free multivalent metal ions. The synergistic effect finally greatly improves the discharge capacity and the cycle stability of the chloride ion battery.

The invention relates to the technical field of secondary batteries, in particular to an amphiphilic polymer as well as a preparation method and application thereof, and the amphiphilic polymer comprises a structure as shown in a formula (I) and / or a formula (II): # imgabs 0 # formula (I) and # imgabs 1 # formula (II). The amphiphilic polymer provided by the invention captures hydrogen fluoride (HF) under the action of electrostatic adsorption, hydrogen bonds and weak electrons in an acid environment, and realizes metal ion capture by virtue of coordination chelation of nitrogen atoms of a triazole ring and auxiliary enrichment and wrapping of a polyether chain in an alkaline environment, so that corrosion of internal materials of a battery is effectively prevented, and the service life of the battery is prolonged. The performance and the service life of the battery are improved.

The utility model belongs to the technical field of battery sampling, and particularly relates to a battery, battery monomers and a power utilization device, the battery comprises a battery unit and a sampling assembly, the battery unit comprises a plurality of columns of battery monomers arranged along a first direction, and each column of battery monomers comprises a plurality of battery monomers arranged along a second direction; the battery monomer is provided with a pressure relief mechanism, electrode terminals and a first side wall along a third direction, and the electrode terminals comprise a first electrode terminal and a second electrode terminal; the first electrode terminal, the second electrode terminal and the pressure relief mechanism are sequentially arranged on the first side wall at intervals; or, the first electrode terminal and the second electrode terminal are arranged on the first side wall at an interval, and the pressure relief mechanism is arranged on the other side walls of the battery monomer; the sampling assembly comprises an electric connecting piece electrically connected with the electrode terminals and a sampling piece, the sampling piece is arranged between the electrode terminals of every two adjacent rows of battery monomers, and the two rows of battery monomers can share one sampling piece, so that the number of the sampling pieces is reduced, and the manufacturing cost of the battery is reduced.

The invention provides a positive electrode composite current collector, a positive electrode plate, a secondary battery and an electric device. The positive electrode composite current collector comprises a polymer supporting layer, a conductive layer and a high-resistance layer, and the conductive layer is arranged on at least one surface of the polymer supporting layer; the high-resistance layer is arranged on the surface, away from the polymer supporting layer, of the conducting layer, the resistivity of the high-resistance layer is higher than that of the conducting layer, the total sheet resistance of the high-resistance layer and the conducting layer is R1, and R1 is larger than or equal to 50 m omega / -and smaller than or equal to 80 m omega / -. The positive electrode composite current collector disclosed by the invention can keep normal electrode conductivity, so that the DCR of the battery is in a proper range; therefore, the battery has a high nail penetrating test passing rate, and the safety performance of the battery is improved.

An energy storage device according to an aspect of the present invention includes an electrode assembly in which a positive electrode including a positive active material layer and a negative electrode including a negative active material layer are stacked with each other with a separator interposed therebetween, in which the positive active material layer contains a positive active material particle, and the positive active material particle has an internal porosity of 15% or less, and the negative active material layer contains a graphite particle, and the graphite particle has an internal porosity of 2% or less.

Disclosed or provided are high melt temperature microporous Lithium-ion rechargeable battery separators, shutdown high melt temperature battery separators, battery separators, membranes, composites, and the like that preferably prevent contact between the anode and cathode when the battery is maintained at elevated temperatures for a period of time, methods of making, testing and / or using such separators, membranes, composites, and the like, and / or batteries, Lithium-ion rechargeable batteries, and the like including one or more such separators, membranes, composites, and the like.

The present application provides a polymer, a preparation method, a dispersing agent, a positive electrode slurry, a positive electrode plate, a secondary battery, and an electrical apparatus. The polymer comprises a structure as shown in a formula (I), X comprising at least one of a carboxyl group, an ester group, a sulfo group, a sulfonate group, a phosphate group and a phosphate ester group; X' comprising a non-polar group; L comprising a structural unit represented by formula (II), R1 comprising a C1-12 alkylene, a C6-12 arylene or formula (A), R2 containing a C1-12 alkylene, a C6-12 arylene or formula (B), and R3 containing hydrogen or a C1-3 alkyl, EO representing -CH2-CH2-O-, PO representing -CH(CH3)-CH2-O -, m1 and m2 each independently being an integer between 3 and 60, and n1 and n2 each independently being an integer between 0 and 60.

The invention discloses a diaphragm assembly, a battery monomer, a battery and an electric device, and belongs to the technical field of batteries. The diaphragm assembly comprises a first diaphragm, the first diaphragm comprises a first base membrane and a first coating, the first coating is located on the surface of at least one side of the first base membrane, the first coating comprises an inorganic material, and the volume average particle size Dv50 of the inorganic material meets the condition that Dv50 is smaller than or equal to 0.16 [mu] m. According to the technical scheme provided by the embodiment of the invention, the risk of short circuit of the battery monomer can be reduced under the condition that the rate capability of the battery monomer is not deteriorated, so that the battery monomer has relatively good comprehensive performance.

The embodiment of the present invention relates to a method, material and application for improving the air stability of sodium ion layered oxide. The method for improving the air stability of sodium ion layered oxide positive electrode material comprises: regulating the air stability of copper-based sodium ion layered oxide positive electrode material Na x Cu y M z The weighted average ionic potential Φ of O2 ions except sodium ions M And adjust the crystal primary particle size r, so that 47.5 nanometers ‑1 ≤Φ M ≤50.5 nm ‑1 , and 1.4 microns ≤ r ≤ 100 microns, thereby reducing the amount of sodium loss after the sodium ion layered oxide positive electrode material deteriorates in the air, and obtaining a class of air-stable sodium ion battery layered oxide positive electrode materials; wherein M is selected from Ni 2+ 、Zn 2+ Mg 2+ 、Fe 3+ 、La 3+ 、Lu 3+ 、Sb 3+ 、Mn 4+ 、Ti 4+ 、Zr 4+ 、Sn 4+ 、Bi 5+ One or more of; 0.9≤x≤1, and y+z=1.

The invention belongs to the technical field of energy materials, further relates to the field of alkali metal batteries, and particularly relates to an electrolyte for an alkali metal-thionyl chloride secondary battery and application of the electrolyte. The electrolyte is salt capable of transmitting alkali metal ions, thionyl chloride and an additive; the additive is a salt of organic aniline cations. The additive is added into a basic electrolyte adopted by the alkali metal-thionyl chloride secondary battery. According to the present invention, with the introduced additive, the redox couple of the carbon positive electrode interface, which actually participates in the electrochemical reaction, can be changed, the potential and the capacity of the discharge platform under the large current density can be significantly improved, the voltage hysteresis phenomenon can be significantly improved, and the alkali metal-thionyl chloride secondary battery can obtain the excellent specific energy and the excellent energy efficiency. Compared with a comparison sample without addition of the additive, the battery using the additive provided by the invention has the advantages that the charge-discharge polarization is obviously reduced, and the discharge rate capability is improved. According to the battery using the additive provided by the invention, a primary battery is successfully converted into a secondary battery, and after 100 times of circulation, the cycle capacity retention rate of the secondary battery is remarkable.

The utility model discloses a single battery, a battery and electric equipment. The single battery comprises a shell, a shielding piece and a pressing piece, the shell is provided with a first wall which is provided with a weak part; the shielding piece is arranged in the shell and shields at least part of the weak part in the thickness direction of the first wall; the abutting piece is located on the side, away from the first wall, of the shielding piece and abuts against the shielding piece. And the weak part can be opened when the pressure in the shell reaches a certain value, so that the pressure in the shell is reduced, and the probability of structural damage of the battery monomer is reduced. The shielding piece can reduce the impact of the electrolyte on at least part of the weak part in the thickness direction of the first wall, so that the probability that the weak part is opened in advance due to the impact of the electrolyte is reduced to a certain extent. The abutting piece can apply a certain force to the shielding piece, so that the position of the shielding piece is limited, the probability that the shielding piece dissociates to other positions along with flowing of the electrolyte is reduced, and the shielding piece can continuously cover the weak part.

The invention relates to an adhesive, an insulating film, a battery shell, a preparation method of the battery shell, a battery monomer, a battery and electric equipment, and the adhesive comprises 60-95 wt% of acrylic resin, 3-35 wt% of an active monomer and 0.8-10 wt% of a photoinitiator. The battery shell comprises a shell body and an insulating protective film, the insulating protective film comprises a connecting layer and a base film layer, and the connecting layer is formed by photo-curing an adhesive layer and is connected with the outer surface of the side wall of the shell body. According to the adhesive, the acrylic resin is taken as a main component, the acrylic resin is matched with the active monomer and the photoinitiator with specific contents, and is cured under the irradiation of light to form a polyester three-dimensional network cross-linked body, so that relatively good adhesion can be provided for an insulating film, and the bonding strength of the insulating film and the surface of a battery shell can be improved.

The present application discloses a current collecting component, an energy storage device and an electrical equipment, relating to the technical field of batteries. The current collecting component includes: a first connecting member, including a first connecting portion, a second connecting portion and a conducting portion; the conducting portion has at least one first reinforcing rib and at least one second reinforcing rib, the first reinforcing rib protrudes from a first surface of the conducting portion, and the second reinforcing rib protrudes from a second surface of the conducting portion; a second connecting member, the second connecting portion is mechanically connected to a surface of the second connecting member, and after the second connecting portion rotates, the second connecting member is located on a side of the second connecting portion away from the conducting portion. In the embodiment of the present application, the first reinforcing rib and the second reinforcing rib can achieve positioning when the first connecting portion and the second connecting portion rotate relative to the conducting portion, so as to improve the bending yield rate of the current collecting component, and after the first connecting portion and the second connecting portion rotate, the first reinforcing rib and the second reinforcing rib can respectively support the first connecting portion and the second connecting portion, avoiding the brittle fracture of the current collecting component.