32results 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.

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 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.

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.

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.

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.

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.

Provided is a binder composition for an electrical storage device, which enables the production of an electrical storage device electrode excellent in repeated charge-discharge characteristic through a reduction in internal resistance and also excellent in charge-discharge durability characteristic under high temperature through an improvement in adhesiveness. The binder composition for an electrical storage device according to the present disclosure includes: a polymer (A); and a liquid medium (B), wherein, with respect to 100 mass% in total of repeating units contained in the polymer (A), the polymer (A) contains: 15 mass% to 60 mass% of a repeating unit (a1) derived from a conjugated diene compound; and 1 mass% to 30 mass% of a repeating unit (a2) derived from an unsaturated carboxylic acid, and wherein tan6 (loss elastic modulus / storage elastic modulus) in dynamic viscoelasticity of the polymer (A) has one peak top in a range of from -50°C or more to less than 15°C (tanδ1), one peak top in a range of from 15°C or more to less than 85°C (tan62), and one peak top in a range of from 85°C or more to 150°C or less (tanδ3).

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.

Provided is a method for manufacturing an electrode for an all-solid-state battery comprising the steps of preparing primary granules comprising an active material, an electrically conductive material, and a binder, mixing the prepared primary granules with a solid electrolyte to prepare secondary granules coated with the solid electrolyte by a mechanofusion method, and applying the prepared secondary granules on a current collector to prepare an electrode. According to one embodiment of the present invention, the primary granules have an average particle diameter (D50) of 50 µm to 110 µm, and the secondary granules have an average particle diameter (D50) of 10 µm to 30 µm. The electrode manufactured according to the above manufacturing method contributes to improving the performance of the battery when applied to an all-solid-state battery by improving the electrical network between the active material and the solid electrolyte.

Provided in the present application are a battery cell, a battery, and an electric device. The battery cell comprises a top cover assembly and an electrode assembly. The top cover assembly comprises a top cover plate and an isolation member arranged on one side of the top cover plate. That is, the isolation member is arranged between the top cover plate and the electrode assembly, so as to reduce short circuit connections between the top cover plate and the electrode assembly. The electrode assembly is arranged on the side of the isolation member away from the top cover plate. The electrode assembly comprises an electrode body and tabs extending out of the electrode body. A protruding portion connected with the electrode body is connected to a peripheral side of at least one of the tabs, so as to increase an overcurrent area between the tab and the electrode body. The surface of the isolation member away from the top cover plate is provided with a clearance recess used to accommodate at least a portion of the protruding portion, such that the problem that the tab is deformed due to interference of the isolation member and the protruding portion with each other is mitigated, and the matching relation between the isolation member and the tab is improved, thereby improving the battery performance.

The present disclosure provides a method of manufacturing a separator for a lithium secondary battery, the method including a step (S1) of preparing a slurry in which a binder polymer is dissolved and inorganic particles are dispersed, the slurry being prepared by adding and mixing the binder polymer and the inorganic particles in a solvent, and a step (S2) of forming a porous coating layer by applying and drying the slurry on at least one surface of a porous polyolefin polymer substrate having a plurality of pores. The thickness of the porous polyolefin polymer substrate is 9 µm or less, the D90 particle size of the inorganic particles dispersed in the slurry is 3 µm or less, and the surface roughness Ra of the porous coating layer is 50 to 500 nm.

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 application relates to an electrolyte automatic mixing system and an automatic mixing method thereof, which comprises the following: a plurality of solvent metering units; at least one mixing and filling module; an intermediate pipeline which is connected in parallel with the mixing and filling module and the solvent metering units; a glove box which is connected to a weighing and configuration kettle through a feeding pipeline; a circulating and rinsing pipeline, the circulating pump inlet of which is connected to the outlet of a terminal filter, the outlet of which is connected to the top of the weighing and configuration kettle, and the circulating and rinsing pipeline is connected to the feeding pipeline of the glove box through a tee joint; and a nitrogen pipeline which is provided with three branches for pressurizing the solvent, purging the filling residues and maintaining the micro-positive pressure of the glove box. The electrolyte automatic mixing system realizes high-precision metering, zero waste, automatic mixing of the whole process, and improves the production efficiency and safety by pressurizing the solvent through nitrogen, reversely flushing the inner wall of a salt adding pipeline through the circulating and rinsing pipeline, and purging the residues after filling through nitrogen.

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.