21results about How to "Improve battery performance" patented technology

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.

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.

Disclosed are a separator for a lithium-sulfur battery, a method for preparing the same and a lithium-sulfur battery containing the same. The separator comprises: a polymeric substrate film; and a composite layer on one surface of the polymeric substrate film, wherein the composite layer comprises a SCM molecular sieve and a conductive carbon material, wherein the SCM molecular sieve is selected from SCM-14 and SCM-15, and preferably, the SCM molecular sieve further contains cobalt. The separator in accordance with the present disclosure can effectively suppress the shuttle of polysulfides in lithium-sulfur batteries, and thereby reduce side reactions within the batteries, lower the self-discharge rate of lithium-sulfur batteries, and improve the cycling performances, rate performances, and storage life of the batteries.

The invention discloses a preparation method of a solar cell and the solar cell. The preparation method of the solar cell comprises the following steps: preparing a tunneling layer on the back surface of a silicon substrate; a first N-type silicon slurry layer and a second N-type silicon slurry layer are prepared in a first region on the back surface of the tunneling layer and a second region spaced from the first region respectively, and the first N-type silicon slurry layer and the second N-type silicon slurry layer are doped with different types of doping sources respectively; annealing to convert the first N-type silicon slurry layer and the second N-type silicon slurry layer into an N-type doped polycrystalline silicon layer and a P-type doped polycrystalline silicon layer respectively; and forming a first electrode and a second electrode in the first region and the second region respectively. According to the method, the silicon slurry of different doping types is deposited in the two regions of the silicon substrate, the preparation of the N region and the P region can be completed in the annealing process, multiple times of masking and laser grooving are not needed, the preparation process of the solar cell is greatly simplified, and the production cost of the solar cell is reduced.

The utility model discloses a kind of electrolyte's liquid pool condensing device, including electrolyte plating liquid pool, condensing plate and mould temperature machine;The top liquid pool mouth of the electrolyte plating liquid pool is covered with condensing plate;The condensing plate is equipped with condensing pipe and cooling fin;The input end of the condensing pipe is communicated with the output end of mould temperature machine, and the output end of condensing pipe is communicated with the input end of mould temperature machine;The cooling fin is abutted with condensing pipe, and cooling fin is arranged in the inside of electrolyte plating liquid pool;The mould temperature machine is used to output low-temperature liquid into condensing pipe;This scheme can improve condensing efficiency, enhance the adaptability with electrolyte plating liquid pool, realize flexible adjustment, ensure equipment stable operation, reduce electrolyte volatilization loss, improve the stability of lithium supplement process and battery product quality.

The utility model relates to a driving system and a vehicle. The driving system comprises an engine; the first motor can generate electricity under the driving of the engine; the second motor is used for outputting power; and the Ravigneaux planet row is connected to the engine and is used for outputting power. The first motor is driven by the engine to generate power, can directly supply power to the second motor or store the power in the battery pack, so that the power guarantee performance of the battery can be improved, the second motor can continuously output power independently or together with the engine, and the problem that oil consumption is increased due to frequent driving of the engine, low-efficiency parallel power generation and the like is solved.

The invention discloses a polymer film as well as a preparation method and application thereof. The polymer film has a spongy porous structure; the pore size of the polymer film is 0.05 to 150nm; the porosity of the polymer film is 1-200%; and the thickness of the polymer film is 10-500 [mu] m. According to the membrane prepared by the invention, the cyclohexane structure with good toughness and adjustable substituent groups is combined with the spongy pore structure obtained by the steam-induced phase separation method, so that the ionic conduction membrane with good mechanical property, good ion selectivity and good ionic conductivity is obtained. When the material is applied to a flow battery, good flow battery performance is obtained through multiple regulation and control of a cyclohexane structure, an organic solvent, a volatile solvent and a poor solvent steam atmosphere.

The utility model discloses a kind of battery unit and electric equipment, and battery unit includes battery shell and electrode assembly.Electrode assembly includes insulating component and metal conductor.Electricity shell is equipped with through-hole.Insulating component includes first insulating piece and second insulating piece.First insulating piece is connected to battery shell inner side, and second insulating piece is connected to battery shell outer side.Metal conductor is worn through hole, and part of metal conductor extends to battery shell inner side and is connected first insulating piece, and another part extends to battery shell outer side and is connected second insulating piece.Metal conductor of the scheme can be directly led out from battery shell to battery shell outside, can effectively reduce pole column internal resistance, improve battery performance.And, the scheme can omit rivet and its riveting process, effectively simplify processing technology, save material cost.

The application discloses a preparation of a nitrogen-doped carbon loaded iron-cobalt nanoparticle bifunctional catalyst and catalytic application thereof, and first prepares a graphene loaded iron metal monatomic atom catalyst; then the catalyst is subjected to iron trichloride intercalation, and is subjected to dry ball milling with a nitrogen source and a cobalt source to obtain a precursor; and the nitrogen-doped carbon loaded iron-cobalt nanoparticle oxygen reduction / oxygen evolution bifunctional catalyst is prepared by pyrolysis of the precursor through programmed temperature rising. The iron source is first introduced to prepare the monatomic atom catalyst with high oxygen reduction performance, and then the cobalt source is introduced to make the catalyst realize efficient bifunctional catalysis of oxygen reduction and oxygen evolution, and the catalytic performance is superior to that of a commercial platinum-carbon catalyst and an iridium oxide catalyst using noble metals, but the preparation cost is greatly reduced, and the catalyst has wide application prospect.

The invention relates to the technical field of fuel cells, in particular to a proton exchange membrane capable of efficiently resisting carbon monoxide poisoning and a preparation method of the proton exchange membrane. According to the invention, a graphene functionalized anchored catalyst and gradient catalyst distribution membrane structure design strategy is adopted, so that the dispersity and utilization rate of the catalyst in a proton membrane are improved, further, the stack performance degradation caused by gas impurities is effectively relieved, and membrane electrode and stack optimization iteration is guided. The proton exchange membrane with an excellent carbon monoxide poisoning resisting effect is prepared, the proton exchange membrane is prepared into a membrane electrode for a fuel cell, compared with an additive-free proton exchange membrane, the performance of the cell based on the membrane is greatly improved, the carbon monoxide poisoning resisting capability can reach 0.72 V at 600 mA / cm < 2 > at 60 ppm CO, and the durability of the fuel cell is effectively improved.

The present invention relates to a solid electrolyte powder to be used in a lithium-ion all-solid-state battery, the volumetric grain size distribution in the solid electrolyte powder having a first peak within the grain size range of 0.5-0.7 µm and having a second peak within the grain size range of 1-3 µm.

A non-aqueous electrolyte secondary battery provided with a first electrode, a second electrode, a non-aqueous electrolyte, and a separator interposed between the first electrode and the second electrode, the first electrode being provided with a first current collector and a first active material layer supported on the first current collector, the first active material layer containing a first active material, a binder, and an additive; the additive is a polymer material having a melting point or a thermal decomposition temperature of 200-500 DEG C inclusive, the polymer material forms a plurality of island-like regions and is dispersed in a cross section of the first active material layer, and when the first active material layer is heated from 25 DEG C to 400 DEG C or more, the area of the island-like regions in the cross section of the first active material layer is increased by four times or more.

Provided is a laminate for a secondary battery in which separator curling up is inhibited. A method of producing a laminate for a secondary battery includes: a step (A) of producing an affixed body including a negative electrode material and separator webs affixed to both surfaces of the negative electrode material or an affixed body including a negative electrode material, a first separator web, a positive electrode, and a second separator web affixed in stated order; and a step (B) of cutting the affixed body. The step (A) includes a step (a1) of applying an adhesive material at affixing surfaces of the negative electrode material and the separator webs. The adhesive material is applied in the step (a1) such that a first coated section including a region where the adhesive material is applied with a coating weight M1 and a second coated section including a region where the adhesive material is applied with a coating weight M2 (≥ M1 + 0.02 g / m2) are located alternately in a longitudinal direction. The affixed body is cut within a range where the second coated section is located in the step (B). The positive electrode is located at a position opposite the first coated section.

The invention discloses a lithium battery diaphragm, a battery cell, a lithium ion battery and an electronic device. A continuous coating side heat-resistant coating is formed on one surface of a base membrane of the lithium battery diaphragm, a continuous coating side glue coating is formed on the surface, far away from the base membrane, of the continuous coating heat-resistant coating, and the other surface of the base membrane is coated with a heat-resistant coating at intervals; and gluing the surface, far away from the base film, of the interval coating side heat-resistant coating and the surface of the interval coating side base film to form an interval coating side glue coating. When the lithium battery diaphragm disclosed by the invention is used for winding a pole group, an overlapping region of the heat-resistant coating on the interval coating side and the surface adhesive coating falls in a corner region of the pole group, and the single adhesive coating falls in a large-surface region of the pole group, so that the pole group can keep relatively good flatness after hot pressing, and the improvement of a positive and negative pole piece interface and battery performance in a full-charge state of a battery cell is facilitated; and the problem of lithium precipitation at the outer side of the negative electrode at the corner can be improved, and the safety performance and cycle performance of the battery are improved.

The application provides a battery management strategy generation method and a battery management method, and relates to the technical field of battery management. The method comprises the following steps: receiving battery data uploaded from multiple vehicles; grouping the multiple vehicles according to clustering attributes based on the clustering attributes corresponding to the battery data, to obtain multiple vehicle sets; performing data analysis on the battery data of the vehicles in a target vehicle set, to obtain a data analysis result of the target vehicle set; generating a battery management strategy corresponding to the target vehicle set according to the data analysis result; and issuing the battery management strategy to one or more target vehicles in the target vehicle set. The application not only enables the battery data of each vehicle in the vehicle set to serve as a reference basis for generating a battery management strategy, but also enables differentiated battery management for different vehicle sets, thereby continuously improving the battery performance of the vehicles.

A non-aqueous electrolyte secondary battery provided with a first electrode, a second electrode, a non-aqueous electrolyte, and a separator interposed between the first electrode and the second electrode, the first electrode being provided with a first current collector and a first active material layer supported on the first current collector, the first active material layer containing a first active material, a binder, and an additive; the additive is a polymer material having a melting point or thermal decomposition temperature of 200-500 DEG C inclusive, and the aspect ratio DL / DW of the length DL of the long axis defining the maximum diameter of the particles of the polymer material to the length DW of the short axis perpendicular to the long axis at the intermediate point of the long axis is 1.5 or less.

This invention belongs to the field of flow battery electrolyte technology and discloses a method for inhibiting water migration or permeation across the membrane in a zinc-iron flow battery. The positive electrode electrolyte of the zinc-iron flow battery is composed of sodium ferrocyanide and an alkali metal hydroxide, and the negative electrode electrolyte is composed of zinc oxide and an alkali metal hydroxide. Both the positive and negative electrode electrolytes are magnetically stirred until completely dissolved in a water bath at a temperature of 20-80°C. Then, equal volumes of the positive and negative electrode electrolytes are placed in the zinc-iron flow battery, with a separator separating the positive and negative electrodes. This invention is simple, has widely available and low-cost resources, and features high safety and good stability, making it applicable to the field of flow battery electrolytes.