78results about How to "Improve battery performance" patented technology

The invention provides a vehicle mode control method and system and a vehicle, and belongs to the technical field of vehicles. According to the embodiment of the invention, the gearbox controller sends the second flag bit to the vehicle control unit, so that the vehicle control unit can comprehensively consider the first flag bit and the second flag bit to determine an appropriate low-speed direct-drive function flag bit, and then the low-speed direct-drive function of the vehicle is achieved through coordination between the gearbox controller and the vehicle control unit. Accurate control over the low-speed direct-drive mode is achieved, and the vehicle can be switched to the low-speed direct-drive mode at a proper time. On the other hand, by developing a low-speed direct-drive mode, the engine can drive the vehicle in a low-speed scene, the problem that the vehicle runs in winter and consumes too fast electricity is effectively solved, the electricity protection capacity of the vehicle is improved, the vehicle can be always kept in a four-wheel-drive state in a low-speed state, the phenomenon that the vehicle slips and drifts in snowy days is effectively avoided, and the service life of the vehicle is prolonged. And the driving safety of the vehicle is ensured.

The invention relates to a formula of a high-performance sodium-ion battery electrolyte, and aims to improve the cycle life, safety and rate capability of a sodium-ion battery. The electrolyte comprises sodium hexafluorophosphate as a sodium salt, carbonic ester as an organic solvent and a plurality of additives (fluoroethylene carbonate, bis (2, 2, 2-trifluoroethyl) carbonate, ethylene sulfate, 1, 3-allyl sultone and sodium difluoro (oxalato) borate). Through the synergistic effect of the additives, a stable positive electrode / electrolyte interface film (CEI) is formed, cation dissolution is reduced, and the sodium ion transmission performance and the high-voltage stability of the battery are improved. In a half cell assembled with a NaNi0. 4Fe0. 2Mn0. 4O2 positive electrode, when the electrolyte works in a voltage range of 2-4.2 V, the specific discharge capacity of more than 160mA. H / g is provided, and the capacity retention ratio exceeds 80% after 200 cycles at the rate of 1C.

The invention relates to a preparation method of a membrane electrode suitable for a low-humidity working condition, which comprises the following steps: (1) dissolving an ionic liquid in ultrapure water, and uniformly dispersing to obtain an ionic liquid aqueous solution; (2) uniformly mixing the ionic liquid aqueous solution obtained in the step (1) with a catalyst, coating the surface of the catalyst with the ionic liquid, and cleaning and drying the coated catalyst to obtain an ionic liquid coated catalyst; (3) uniformly mixing the ionic liquid coated catalyst obtained in the step (2) with an ionomer and a dispersing solvent, preparing catalyst slurry, and spraying to prepare a cathode catalyst layer; and (4) hot-pressing the cathode catalyst layer and the anode catalyst layer obtained in the step (3) to two sides of a proton exchange membrane to prepare the membrane electrode. Compared with the prior art, the membrane electrode disclosed by the invention can ensure high-efficiency transmission of protons in the catalyst layer under a low-humidity working condition, so that wide-working-condition operation is realized; meanwhile, oxygen mass transfer is enhanced, and the battery performance under high current density is improved.

This application discloses an all-solid-state hydrogen negative ion battery, belonging to the field of hydrogen negative ion conductors. It includes a positive electrode containing a hydrogen negative ion donor, a negative electrode capable of storing hydrogen negative ions, and a solid hydrogen negative ion conductor between the positive electrode and the negative electrode; the chemical formula is M 1 α M 2 β O x N y H z ; M 1 is selected from at least one of alkaline earth metal elements Ba, Sr, Ca, Mg; M 2 is selected from at least one of lanthanide metal elements La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu; 0 ≤ α ≤ 6, 0 ≤ β ≤ 4, and α and β are not both 0 at the same time; 0 < x ≤ 6, 0 < y ≤ 4, 0 < z ≤ 12; when M 2 is trivalent, 2α + 3β = 2x + 3y + z; when M 2 is tetravalent, 2α + 4β = 2x + 3y + z.

The invention relates to the technical field of vehicle control, and provides a vehicle control method and device and a vehicle. The method comprises the following steps: acquiring a current running mode of a vehicle; determining a torque distribution coefficient to be selected based on the current actual battery electric quantity of the vehicle in response to the determination that the current operation mode is a direct drive mode or a series-parallel mode; the current torque distribution coefficient at the current moment is determined, and the target torque distribution coefficient with the minimum energy consumption is determined from the torque distribution coefficients to be selected and the current torque distribution coefficient according to the driving mode of the vehicle; and distributing the current torque request according to the target torque distribution coefficient. Therefore, the current torque request can be distributed according to the target torque distribution coefficient with the minimum energy consumption, so that the power consumption of the vehicle is reduced, and the power protection capability of the vehicle can be improved when the electric quantity of the vehicle battery is low.

The invention provides a preparation method of an oxygen-etched Fe-N-C cathode oxygen reduction catalyst, which comprises the following steps: in a protective atmosphere, performing first pyrolysis on ZIF-8 to obtain a nitrogen-carbon substrate with a regular dodecahedron frame structure; the method comprises the following steps: dispersing a nitrogen-carbon substrate, superoxide and crown ether in a solvent to obtain a turbid liquid, releasing superoxide ions in the turbid liquid, forming a carbon-oxygen double bond defect by the superoxide ions and carbon atoms in the nitrogen-carbon substrate, and centrifuging the turbid liquid to obtain a composite solid; and grinding and mixing the composite solid and iron salt, performing secondary pyrolysis in a protective atmosphere, and performing acid pickling and drying to obtain the oxygen-etched Fe-N-C cathode oxygen reduction catalyst. The invention further provides the Fe-N-C cathode oxygen reduction catalyst obtained through the preparation method and application of the Fe-N-C cathode oxygen reduction catalyst.

The embodiment of the present application relates to the field of battery technology and provides a method for preparing a lithium-ion battery, comprising: winding or laminating a positive electrode sheet, a negative electrode sheet and a separator and then placing them into a shell to form an initial battery cell; in a first liquid injection process, injecting a first electrolyte into the initial battery cell, the components of the first electrolyte including: 0.5wt%~2wt% of vinylene carbonate, 5wt%~15wt% of lithium salt and a non-aqueous organic solvent; performing a formation process on the initial battery cell; in a second liquid injection process, injecting a second electrolyte into the initial battery cell, the components of the second electrolyte including: 5wt%~20wt% of vinylene carbonate, 5wt%~15wt% of lithium salt, 0.005wt%~30wt% of a wetting stabilizer and a non-aqueous organic solvent; wherein, the first electrolyte or the second electrolyte further includes: at least one of 1,3-propane sultone or fluoroethylene carbonate, which is at least conducive to maintaining the lithium-ion battery with high energy efficiency and long cycle life under the condition of low liquid injection amount.

Provided is a binder for nonaqueous electrolyte secondary battery electrodes, which is capable of suppressing the degree of swelling of an electrode. A crosslinked polymer containing a carboxyl group or a salt thereof is used as the binder for nonaqueous electrolyte secondary battery electrodes. The cross-linked polymer or a salt thereof has a particle diameter measured in an acetonitrile medium of 0.60-1.0 [mu] m in terms of volume-based median diameter, and a water swelling degree at pH 8 of 25-40.

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 discloses a preparation method and preparation equipment of a dry electrode film. The preparation method of the dry electrode film comprises providing a pair of first rollers with a roller diameter of d1, setting the pressure of the first rollers to t1, rolling the fibrous powder by the pair of first rollers to obtain an initial film of initial thickness; providing a pair of second rollers with a roller diameter of d2, and d2<d1, setting the pressure of the second rollers to t2, and t2<t1, and performing primary thinning on the initial film by the pair of second rollers to obtain a secondary film of secondary thickness; providing at least a pair of third rollers with a roller diameter of d3, and d3>d1, setting the pressure of the third rollers to t3, and t3>t1, and performing secondary thinning on the secondary film by the third roller to obtain a target film of target thickness. The target film prepared in this embodiment has better strength and more suitable toughness characteristics.

The present disclosure belongs to the field of battery technologies, and specifically relates to a battery. The battery includes a positive electrode plate, a negative electrode plate, a non-aqueous electrolyte solution, and a separator. The non-aqueous electrolyte solution includes a non-aqueous organic solvent, a lithium salt, and an optional electrolyte additive. A termination tape of the positive electrode plate is disposed at a paste coating tail of the positive electrode plate. An area of a termination tape of the positive electrode plate is A cm2, and a width of the positive electrode plate is C cm, wherein a ratio of A to C is in a range of 1 to 3. The battery can effectively improve high-temperature performance of a battery cell of the prepared battery, and can also solve a problem of lithium deposition at an edge of an electrode plate occurred after cycling of the battery cell, to avoid problems, such as thickness failure in high-temperature storage and lithium deposition in high-temperature cycling of the battery cell caused by warping and deformation of a termination tape of a positive electrode plate, an adhesive layer in the termination tape of the positive electrode plate being easily soluble in a non-aqueous electrolyte solution, and the non-aqueous electrolyte solution being easily oxidized, reduced and decomposed at positive and negative interfaces, occurred when the battery is used in a high-temperature environment.

The present invention provides a secondary battery electrode binder that exhibits superior binding capacity as compared to conventional binders and that makes it possible to reduce slurry viscosity, even when the solid concentration of an electrode slurry is high. A secondary battery electrode binder according to the present invention contains a block polymer having a polymer block (A) and a polymer block (B), wherein: the polymer block (A) includes a structural unit derived from an ethylenically unsaturated carboxylic acid monomer; the content of a structural unit derived from an ethylenically unsaturated carboxylic acid monomer in the polymer block (B) is less than 30 mass% (and is different from that in the polymer block (A)) with respect to all the structural units of the polymer block (B); the ratio of the polymer block (A) in the block polymer is 10-90 mass%; and the block polymer does not contain a structural unit derived from a crosslinkable monomer.

The invention relates to the technical field of lithium ion battery material preparation, and discloses a core-shell structure composite electrolyte and a preparation method and application thereof. The method comprises the following steps: (1) carrying out ultrasonic treatment on a mixed solution containing a polyphenol solution and an organic amine solution and a titanium-aluminum-lithium phosphate electrolyte to obtain a modified titanium-aluminum-lithium phosphate electrolyte; performing emulsion liquefaction reaction on an acrylate monomer, a first emulsifier and a first initiator to obtain a pre-emulsion; and (2) in the presence of a second emulsifier, a second initiator and a buffer agent, dropwise adding the pre-emulsion to the modified lithium titanium aluminum phosphate electrolyte under a temperature programming condition, and carrying out a polymerization reaction to obtain the core-shell structure composite electrolyte. The core-shell structure composite electrolyte prepared by the preparation method of the core-shell structure composite electrolyte provided by the invention can synergistically solve the interface problem of an LATP solid electrolyte and the problem of low liquid absorption rate of a polymer electrolyte, and the cell performance is obviously improved.

The present invention aims to provide an electrically conductive material that can have high conductivity even when it contains a smaller amount of a noble metal than usual. The present invention relates to an electrically conductive material containing rutile titanium oxide and iridium oxide on the rutile titanium oxide, a percentage of a total iridium element in the electrically conductive material being 30 mass% or less based on a total 100 mass% of the titanium oxide and the iridium, a percentage of the iridium element as measured by XPS being 30 at% or more based on a total 100 at% of the titanium element and the iridium element.

A negative electrode for secondary battery includes a negative electrode current collector; a first active material layer in which a first negative electrode slurry containing a first negative electrode active material is coated onto the negative electrode current collector; and a second active material layer in which a second negative electrode slurry containing a second negative electrode active material is coated onto the first active material layer, wherein the first negative electrode active material contains natural graphite having an mesopore volume of 0.6∗10-3cm3 / g or more and 2.5∗10-3cm3 / g or less, and the second negative electrode active material contains artificial graphite.

Disclosed are a non-aqueous electrolyte solution and a lithium battery. In order to reduce or avoid the use of a sulfur-containing compound in a non-aqueous electrolyte solution and solve the problems of a poor high-temperature storage performance and cycle performance of a lithium battery, in the present invention a non-aqueous electrolyte solution is used, comprising a lithium salt, an organic solvent and additives. The additives include an additive A and an additive B. The additive A is one or more of substances as shown in structural general formula (1). In the structural general formula (1) of the additive A, R1 is selected from alkylene, alkyleneoxy, fluoroalkylene, fluoroalkyleneoxy, alkenylene or fluoroalkenylene, and R2 and R3 are independently selected from hydrogen, phenyl, alkynyl, alkynyloxy, alkyl, alkoxy, fluoroalkyl, fluoroalkoxy, alkenyl or fluoroalkenyl. The additive B is a boron-containing lithium salt. In the non-aqueous electrolyte solution of the present invention, a new additive capable of replacing a sulfur-containing compound is used, such that the high-temperature storage performance and cycle performance of a lithium battery can be improved.

This application relates to an electrode active composition, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active composition includes: a first component, the first component being lithium cobalt oxide particles; and a second component, the second component being ternary material particles. The first component includes lithium cobalt oxide particles with a particle size greater than 11 µm and lithium cobalt oxide particles with a particle size less than 6 µm, and a ratio in number of the lithium cobalt oxide particles with a particle size greater than 11 µm to the lithium cobalt oxide particles with a particle size less than 6 µm is 0.2-4.8, and optionally 0.2-2.8. A summed number of the lithium cobalt oxide particles with a particle size greater than 11 µm and the lithium cobalt oxide particles with a particle size less than 6 µm accounts for above 90% of a total number of particles in the first component.

An object is to provide a binder capable of improving battery performance. Further, an object is to provide a binder, in an electrode using a polytetrafluoroethylene resin, capable of reducing resistance and achieving high strength of the electrode. A binder including a mixed powder including a polytetrafluoroethylene resin and a single-walled carbon nanotube. A method for producing a binder, including homogeneously mixing a polytetrafluoroethylene resin dispersion and a single-walled carbon nanotube dispersion by using water as a dispersion solvent, followed by drying to form a mixed powder.

The invention provides a water-based polyimide containing a copolymer of diaminomaleonitrile and a dianhydride monomer, a preparation method and an application, the main chain of the water-based polyimide is composed of a rigid aryl skeleton with high molecular weight, and the water-based polyimide is combined with diaminomaleonitrile (DAMN) with a large number of nitrile polar groups and carbon-carbon double bonds. The high-molecular-weight polymer with excellent mechanical strength can be prepared, and the polarity of nitrile groups and the affinity of lithium ions are achieved at the same time. The obtained maleonitrile polyimide is proved to have excellent chemical stability, film-forming property and high adhesion strength at the same time.

The invention provides an MOF precursor nitrogen-doped porous carbon / sulfur composite material and a preparation method and application thereof, and belongs to the field of material preparation.MIL-88 (B)-NH2 is used as a precursor for preparing porous carbon, after calcination, an iron element in MOF is oxidized into Fe3O4, nitrogen-doped carbon-coated Fe3O4 nanoparticles are obtained, finally, the Fe3O4 nanoparticles in a carbon shell are etched through acid pickling, and the nitrogen-doped porous carbon / sulfur composite material is obtained. The N-MPC is obtained; and sulfur powder enters micropores of the porous carbon through a melt diffusion method to obtain N-MPC (at) S which is used as the positive electrode of the RT-Na / S battery. And under the synergistic effect of the porous structure and nitrogen doping, excellent battery performance and excellent rate reversibility are shown in an RT-Na / S battery.

A metal composite compound, in which, in a powder X-ray diffraction measurement using CuKα rays, a relative standard deviation of a volume-based crystallite size distribution calculated from a diffraction peak in a range of 2θ = 19 ± 1° is 0.50 or more.

A method of fabricating an electrically-controlled birefringence cell. The cell has a cell gap no more than 20 micrometers. The cell has an alignment layer arranged to impart a pretilt on liquid crystal in contact with the alignment layer. The method comprises processing the alignment layer to achieve a surface anchoring value between the liquid crystal and alignment layer of less than 1 mJ / m2.

The present application relates to fuel cell technology field, it is a kind of dendritic flow passage structure, including shell, primary separator, secondary separator and tertiary separator, closed mounting cavity is equipped in shell, outlet is equipped in shell upper side with the upper portion of mounting cavity intercommunication, inlet is equipped in shell lower side with the lower portion of mounting cavity intercommunication.The present application is reasonable and compact in structure, inlet is small flow channel, after gas flow into mouth, with flow, small flow channel gradually carries out merging, finally converges into relatively larger flow channel in the outlet of end and flows out.The gas of the present application enters when, it will be under the action of pressure, symmetrically flows into flow passage two ends, is forced to pass through porous gas diffusion layer, after reaction, enters gas outlet branch flow passage, then two branches converge into wider flow channel and flow out, the dendritic flow passage structure can make gas flow through flow passage evenly, make pressure distribution uniform in flow passage, improve fuel cell battery performance.

This invention provides an electrode and a battery that improve battery safety performance. The battery provided by this invention improves battery safety performance by providing an insulating layer near the edge of the current collector close to the tab, with the insulating layer partially extending to the surface of the tab. This reduces the generation of burrs at the electrode edge during electrode cutting. Furthermore, by controlling the color difference between the insulating layer and the empty foil area, the uniformity and good coating quality of the insulating layer can be ensured, thereby improving the sealing performance, electrolyte stability, and battery performance of the lithium-ion battery. This contributes to improving the battery's reliability, safety, and overall performance.

The composite-coated conversion positive electrode material comprises a conversion positive electrode base and a composite coating layer coated on the surface of the conversion positive electrode base, the conversion positive electrode base is M x S y , M a O, M b Z, M is at least one of Li, Fe, Cu, Ni, Mn, Co, Mo, Sn, Ti and W, Z is at least one of F, Cl and Br, the values of x, y, a and b vary according to the principle of electrical neutrality; the particle size of the conversion positive electrode base ranges from 30 nm to 25000 nm, the thickness of the composite coating layer accounts for 0.1% to 10% of the particle size of the conversion positive electrode base, the composite coating layer comprises an elastomer material and an electronic conductor material, the breaking elongation of the elastomer material is greater than or equal to 100%, and the tensile strength is greater than or equal to 5 MPa.

This invention discloses a method for preparing carbon-coated lithium titanium phosphate anode material, comprising the following steps: sequentially mixing water, a lithium source, a phosphorus source, a titanium source, a carbon source, and a dispersant, stirring to obtain a mixture; and sequentially subjecting the mixture to sand milling, drying, and heat treatment to obtain carbon-coated lithium titanium phosphate material. The preparation method of this invention is simple, efficient, and easy to operate. The carbon-coated lithium titanium phosphate material prepared reduces the polarization phenomenon of lithium titanium phosphate, thereby improving the battery capacity and cycle stability.

The present application provides a vehicle control method, a storage medium and a vehicle, and belongs to the field of vehicle technology. By acquiring vehicle status information when the vehicle is in a low-speed four-wheel drive state, the vehicle can be controlled to switch from the current drive mode to the low-speed direct drive mode when the vehicle status information meets the mode switching conditions, and the vehicle can be controlled to travel in the low-speed direct drive mode; wherein, in the low-speed direct drive mode, the clutch of the vehicle is in a slipping state, and the engine is in a driving state. By developing a low-speed direct drive mode, the embodiment of the present application enables the engine to drive the vehicle in a low-speed scenario, on the one hand, effectively solving the problem of excessive power consumption of the vehicle in winter, thereby improving the vehicle's power conservation ability; on the other hand, the vehicle can always be maintained in a four-wheel drive state at a low speed, effectively avoiding the vehicle from skidding and drifting in snowy weather, thereby ensuring the vehicle's driving safety.

The invention discloses an integrated metal hydrogen-oxygen fuel cell system constructed based on an aluminum-lithium alloy, and by optimizing the element composition and the surface appearance of a metal air cell negative electrode, the working voltage of the cell is kept stable, and meanwhile, the generation efficiency and the stability of hydrogen are remarkably improved. The 2195 aluminum-lithium alloy negative electrode is selected, the electrochemical activity is enhanced, more reaction sites are exposed through the optimized morphology, it is ensured that hydrogen is continuously generated in the side reaction, and sufficient and stable fuel is provided for the hydrogen-oxygen fuel cell. According to the system, the metal-air cell and the hydrogen-oxygen fuel cell are coupled, so that efficient cyclic utilization of hydrogen is realized, the problem of hydrogen waste in a traditional cell is avoided, and the energy efficiency and the cell performance of the whole system are further improved.

Provided are an end cap assembly, a battery cell, a battery and a power consuming device. The end cap assembly includes: an end cap provided with a positive electrode terminal, an insulating member being provided between the positive electrode terminal and the end cap; and a fuse structure, the fuse structure electrically connecting the end cap to the positive electrode terminal. The fuse structure is configured to be capable of melting when a current flowing through the fuse structure is greater than a predetermined threshold. With the technical solution of the present application, the performance of the battery can be improved.

Embodiments of the present disclosure relate to the field of battery technologies and disclose a cell winding device and method. The cell winding device includes a first cutting unit, a first connection unit, a winding unit, and a second cutting unit. The first cutting unit is configured to perform cutting on an electrode sheet. The first connection unit is adjacent to the first cutting unit, and configured to connect, through a connection tape, adjacent electrode sheets that have been subject to the cutting. The winding unit is configured to perform winding on the adjacent electrode sheets connected through the connection tape and drive, in response to completion of the winding, the electrode sheets that are wound to move, in such a manner that the connection tape corresponds to the second cutting unit. The second cutting unit is configured to perform cutting on the connection tape. With the above scheme, a winding efficiency for a battery cell is improved according to the embodiments of the present disclosure.