500 results about "Electrode fabrication" patented technology

An electrode manufacturing apparatus according to one aspect of the present disclosure is configured to discharge a liquid to form a resin layer or an inorganic layer on an electrode substrate which is being conveyed in a predetermined direction. The electrode manufacturing apparatus includes a detector, a liquid discharger provided downstream of the detector in the predetermined direction and configured to discharge the liquid to form the resin layer or the inorganic layer, and a controller configured to control a discharge condition of the liquid discharger. Points where a property varies are present on the electrode substrate along a direction intersecting the predetermined direction. The detector outputs pieces of detection information obtained by detecting one of the points in time series, and the controller controls the discharge condition of the liquid discharger based on combined detection information obtained by combining the pieces of detection information.

The present invention relates to: an electrochemical biosensor capable of effectively and sensitively detecting alfuzosin; an electrode applied thereto; a metal-organic framework (MOF) which includes a zinc / cobalt oxide and is applied in manufacturing the electrode; and methods for manufacturing same.

The invention discloses a Prussian blue type composite positive electrode material and a preparation method and application thereof, and the Prussian blue type composite positive electrode material provided by the invention is composite powder containing a Prussian blue type positive electrode material, a conductive agent, a binder and a functional additive, the mass ratio of the Prussian blue positive electrode material to the conductive agent to the binder to the functional additive is (90-99): (1-5): (0-5): (0-0.5). According to the Prussian blue composite positive electrode material provided by the invention, the components are uniformly distributed, the Prussian blue composite positive electrode material has the characteristics of high compaction, easy dispersion, relapse resistance, high conductivity and the like, and the Prussian blue composite positive electrode material can be directly used for wet homogenization and can also be directly used for dry electrode manufacturing.

The invention belongs to the technical field of lithium ion batteries, and discloses a carboxyl-containing copolyimide binder, a lithium ion battery silicon negative electrode, a lithium ion battery and a preparation method, and polyamide acid is prepared by using a carboxyl-containing diamine monomer, an amino-terminated long aliphatic chain diamine monomer and an anhydride monomer as raw materials; and carrying out chemical imidization, precipitation and washing on the polyamide acid to obtain the carboxyl-containing copolyimide binder. The prepared carboxyl-containing copolyimide binder has good solubility in a conventional electrode manufacturing solvent, and the solution system of the obtained carboxyl-containing copolyimide binder is uniform and stable. When the carboxyl-containing copolyimide binder is applied to preparation of a silicon negative electrode of a lithium ion battery, the carboxyl-containing copolyimide binder can generate dual covalent interface interaction with silicon active material particles and conductive material particles, so that the migration efficiency of lithium ions in an electrode system is remarkably improved, the transmission dynamics performance is enhanced, and the high-rate charge-discharge capacity of the battery is effectively improved.

Various embodiments of the teachings herein include an apparatus for hyperspectral imaging of electrode webs during electrode manufacturing for battery cells. An example includes: a hyperspectral spectroscopy unit with a line scan camera for imaging, the spectroscopy unit configured: to capture hyperspectral images of the forward-moving electrode web at a predefined location of the electrode manufacturing, to ascertain inhomogeneities of the electrode web from the images, wherein an inhomogeneity is a deviation of the chemical composition of the layers or of the particle size distribution from predefined target variables, and to ascertain and save a local position of the inhomogeneities in the longitudinal direction of the electrode web; and a deflection roll over which the electrode web is guided. The line scan camera captures the images at the position of the contact surface between the deflection roll and the electrode web.

A device and method for manufacturing an electrode are disclosed. An electrode manufacturing device includes an electrode sheet supply roll transferring a pre-electrode sheet which forms a face and another face; a position adjustment roll adjacent to the electrode sheet supply roll and receiving the pre-electrode sheet from the electrode sheet supply roll; a laminating roll and a pressurizing roll which receive the pre-electrode sheet from the position adjustment roll and face each other; an active material supply roll facing the laminating roll and providing an active material to the laminating roll; and a heater proving heat to a heating area of the pre-electrode sheet positioned between the electrode sheet supply roll and the position adjustment roll. The pre-electrode sheet and the active material are inserted into and discharged from between the laminating roll and the pressurizing roll.

The present invention relates to a training device and method for predicting adhesion to an electrode, an electrode monitoring device and an electrode manufacturing method using a prediction model trained using same, and a lithium secondary battery manufactured thereby. The training device for predicting adhesion to an electrode according to one embodiment of the present invention comprises: a memory in which a near-infrared spectrum for an electrode and a measurement value for the adhesion of the electrode are stored; a prediction model which receives a differential average of a plurality of wavenumber sections including characteristics for the adhesion of the electrode in the near-infrared spectrum so as to predict the adhesion of the electrode; and a processor which receives the near-infrared spectrum, performs a first-order differentiation on the near-infrared spectrum, extracts the plurality of wavenumber sections from the first-order differentiated near-infrared spectrum, calculates a differential average of the plurality of wavenumber sections, and transmits the differential average to the prediction model, wherein the processor may receive a prediction value predicted by the prediction model for the adhesion of the electrode, and train the prediction model such that the prediction value is close to the measurement value.

The present invention relates to an electrode manufacturing apparatus, comprising: an unwinding unit for continuously supplying an electrode current collector wound into a roll shape; the plasma processing unit is used for performing plasma processing on the surface of the expanded electrode current collector; an active material applying unit that applies an active material slurry to a surface of the electrode current collector such that the active material layer is disposed thereon; a drying unit for drying the active material layer disposed on the surface of the electrode current collector; and a winding unit for winding the electrode current collector having the dried active material layer into a roll shape, in which the plasma processing unit includes: a guide roller applying tension to the electrode current collector; and at least one plasma generating device inside the guide roller, and the plasma generating device sprays a gas in a plasma state at a surface of the electrode current collector in contact with the guide roller to perform a surface treatment on the surface of the electrode current collector.

An electrode fabrication system is provided. The system includes a powder feeding unit, a powder charging unit, a carrier roller, a carrier roller charging unit and a calendering unit. The dry powder particles applied from the powder feeding unit are charged and attached onto the carrier roller surface through an electrostatic process by applying a proper bias voltage. The charged powder attached on the surface of carrier roller are released and deposited onto a moving foil web to form a powder coating layer through an electrostatic process by applying a proper bias voltage. The powder coating layer is conveyed to the calendering unit and densified with or without heat to form an electrode.

The present disclosure provides a method of controlling binder crystallization during a drying process in electrode fabrication. A method of producing an electrode for battery fabrication includes: drying an electrode material in a compaction phase; applying an electric field to the electrode material during the compaction phase; and adjusting the frequency and magnitude of the electric field to control crystallization of the binder material. The electrode material includes a binder material. The crystallization rate of the binder material is increased or decreased.

The present disclosure relates to an electrode for an electrochemical device, and more particularly, to a dry electrode and a method for manufacturing the same. According to an aspect of the present disclosure, there is provided a new method for manufacturing a dry electrode free of wrinkles in an uncoated portion having no electrode active material layer on a current collector.

The present invention discloses an extrusion molding device for manufacturing graphite electrodes, which belongs to the technical field of graphite electrode molding devices, including a table and a pressure plate arranged above the table, wherein a plurality of pressure heads are fixedly installed on the bottom surface of the pressure plate, and a plurality of molding holes cooperating with the pressure heads are opened on the top surface of the table, wherein a push block is slidably assembled inside the molding hole, and the bottom end of the push block is rotatably connected to a lifting rod, which passes downward through the table and is threadedly connected to the table; when the pressure head moves out of the molding hole, it drives the ring to rotate again, and when the push block just pushes the molded product to move above the table, the slider can move out of the slide groove, thereby preventing the lifting rod from continuing to move upward. Based on the above structure, even if the amount of raw materials in each molding hole is different, when the push block pushes the molded product to move just above the table, the slider can be disengaged from the slide groove, so that the push block remains stable, which is conducive to the push plate to push out each molded product.

A method of producing a battery electrode includes applying an electrode material onto a surface of a current collector, the electrode material comprising a binder material having binder particles, initiating a drying process to dry the electrode material, and applying a non-uniform electric field to the electrode material during the drying process. The non-uniform electric field defines a magnitude gradient to generate dielectrophoretic forces on the binder particles, thereby moving the binder particles.

The invention relates to the technical field of battery electrodes, and discloses an integrated electrode and a preparation method thereof. The method comprises the following steps: pre-oxidizing, carbonizing and cutting a fiber precursor to obtain carbonized fiber; activating the carbonized fibers to obtain porous fibers; combining the porous cellosilk with an energy storage battery electrode active material through a vapor deposition reaction to obtain active cellosilk; and coating the active fibers with a conductive and / or ion-conductive coating material to obtain the integrated electrode. Through the synergistic effect of the porous carbon skeleton structure design, the vapor deposition active substance and the surface coating, the problem that an active material is easy to separate from a current collector in the charging and discharging process of a traditional electrode is solved, the electrode manufacturing process is simplified, and the prepared self-supporting integrated electrode has high specific capacity, excellent cycling stability and rate capability and is suitable for large-scale popularization and application. The material can be applied to energy storage equipment such as lithium ion batteries, sodium ion batteries, lithium-sulfur batteries, solid-state batteries and the like.

The invention provides a polyimide porous carbon-based silicon-carbon negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of lithium battery materials. The high-strength polyimide is prepared from diamine and dianhydride monomers with rigid structures, the porous carbon material prepared from the polyimide has high mechanical strength and structural stability, the structural integrity of porous carbon can be kept in the electrode manufacturing and using process, collapse or pulverization caused by stress or high temperature is reduced, and the service life of the electrode is prolonged. And the long cycle performance is improved. Polyimide is rich in nitrogen element, and nitrogen doping naturally exists in porous carbon formed after pyrolysis, so that electric contact between silicon particles and the porous carbon is enhanced, and the conductivity and rate capability of the material are improved. Therefore, the silicon-carbon negative electrode material prepared by the invention has the advantages of stable structure, good conductivity, high capacity and ultra-long cycle, and solves the problems of long preparation period, low conductivity, insufficient skeleton strength and the like of the existing porous carbon substrate.

The present invention relates to an electrode connection apparatus including a transfer unit configured to transfer a start portion of a standby electrode roll in a state of gripping the start portion, a leading unit configured to move upwards in a state of gripping the start portion of the standby electrode roll transferred by the transfer unit, a first connection unit configured to fix the standby electrode roll transferred by the leading unit, a second connection unit configured to fix an end portion of a moving electrode roll, and a taping unit configured to connect the standby electrode roll and the moving electrode roll to each other, whereby it is possible to automatically connect the electrode rolls to each other during an electrode manufacturing process performed as a roll-to-roll process.

An electrode manufacturing device is provided. The electrode manufacturing device includes a pressing roll configured to apply pressure to an uncoated part of the electrode, wherein the pressing roll comprises a central part, a first end part and a second end part, wherein the uncoated part comprises an insulating coated part and a non-insulating coated part, wherein the first end part is adjacent to a boundary between the insulating coated part and the non-insulating coated part, wherein the second end part is located at a portion far away from the insulating coated part, and wherein a first outer diameter of the central part connected to the first end part is greater than a second outer diameter of the central part connected to the second end part.

To provide a manufacturing method for an electrode with high adhesion between a current collector and an active material layer.SOLUTION: A manufacturing method for an electrode for a secondary battery includes an unevenness forming step for forming unevenness on the surface of a metal foil which is a current collector, and an active material layer forming step for forming an active material layer by placing coated powder particles, formed by coating the surface of the active material powder particles with a non-aqueous binder, on the surface of the metal foil.SELECTED DRAWING: Figure 1

The present invention relates to an electrode connecting apparatus, comprising: a conveying unit configured to convey the starting portion of a backup electrode roll while clamping the starting portion; a leading unit configured to move upward while clamping the starting portion of the backup electrode roll conveyed by the conveying unit; a first connecting unit configured to fix the backup electrode roll conveyed by the guiding unit; a second connecting unit configured to fix the end portion of a moving electrode roll; and a tape applying unit configured to connect the backup electrode roll and the moving electrode roll to each other, thereby enabling the electrode rolls to be automatically connected to each other during an electrode manufacturing process performed in a roll-to-roll process.

The utility model provides film pressing equipment and an electrode manufacturing system. The film pressing equipment comprises a film forming roller, a fixed roller, a first calendering roller and a second calendering roller which are sequentially arranged according to a material feeding sequence, wherein the circumferential surfaces of the film forming roller, the fixed roller, the first calendering roller and the second calendering roller are all provided with wear-resistant layers, and the thicknesses of the wear-resistant layers are sequentially increased according to the material feeding sequence; the wear resistance of the surfaces of the compression rollers is enhanced, the wear degree of the surfaces of the compression rollers is reduced, the wear degree of the compression rollers can be relatively balanced, the service life of the compression rollers can be prolonged, and the film pressing equipment is ensured to run for a long time with stable performance.

The present invention pertains to a binder for a secondary battery positive electrode, to a method of preparation of said electrode and to its use in a secondary battery. The invention also relates to the secondary batteries manufactured by incorporating said electrode.

To provide a disposing method of metal foil that reduces waste.SOLUTION: A disposing method of metal foil includes: winding up a long piece of metal foil that is left unused during electrode production while being suctioned to a winding core equipped with an air suction mechanism; and then stopping the suction to separate the metal foil from the winding core and recover the metal foil.SELECTED DRAWING: Figure 1

The present invention relates to an electrode manufacturing device and an electrode assembly manufacturing device including the electrode manufacturing device, the electrode manufacturing device including: a first electrode conveying unit, which is configured to convey a first electrode with an electrode coating formed on one surface or two opposite surfaces; a first cutter, which is configured to cut the first electrode conveyed by the first electrode conveying unit to form a first unit electrode; a first diaphragm conveying unit arranged on one side of the first electrode conveying unit, the first diaphragm conveying unit being configured to convey the first diaphragm; a first sensor unit, which is configured to sense the position of the first unit electrode; and a first alignment unit, which is configured to adjust the conveying speed of the outer periphery of the first unit electrode parallel to its conveying direction so as to adjust the interval between the first unit electrodes placed on one surface of the first diaphragm, wherein before the process of stacking and laminating electrodes with different polarities, it is determined whether the positive electrode and the negative electrode are aligned with each other, and then the positive electrode and the negative electrode are stacked, thereby preventing defective electrodes from being generated due to misalignment between the positive electrode and the negative electrode.

Disclosed is a dry electrode manufacturing apparatus. The dry electrode manufacturing apparatus may include: an adding portion to supply an electrode powder for dry electrode manufacturing; a guide chute through which the electrode powder supplied from the adding portion passes; a dispersion rod provided in the guide chute for dispersing the electrode powder and adjusting the particle size distribution; a driver for moving at least one selected from the group consisting of the guide chute and the dispersion rod by applying an external force; and a press roller for compressing the electrode powder having the particle size distribution adjusted by the guide chute and the dispersion rod into an electrode member in the form of a sheet having a set thickness.

An apparatus for manufacturing a dry electrode may include a feeder configured to supply fine powder, a plurality of main rollers sequentially disposed in a first direction and configured to calender the fine powder supplied from the feeder into a free-standing film, and a plurality of shear rollers adjacent to the plurality of main rollers in a second direction crossing the first direction. The plurality of main rollers and the plurality of shear roller are configured such that the free-standing film is interposed between the main rollers and the shear rollers.

The adhesion between the current collector and the electrode layer is improved, while reducing resistance at the interface between the current collector and the electrode layer. [Solution] The current collector 100 of this disclosure comprises a substrate 101 and a coating layer 102. The coating layer 102 includes a conductive material 103 and a binder 104. The conductive material 103 includes a carbon material. In the Raman spectrum of the coating layer 102, the G / D ratio, which is the ratio of the peak intensity of the G band to the peak intensity of the D band, is greater than 0.80 and less than 3.09.

One embodiment of the present invention provides a lithium secondary battery electrode comprising a current collector, and an electrode active material layer provided on the current collector, wherein, when a particle size distribution is measured on the upper side of the electrode active material layer, less than 24% of fractured particles having a particle size of less than 40% of the average particle size of electrode active material particles are present. One embodiment of the present invention provides a method for manufacturing a lithium secondary battery electrode and a device for manufacturing a lithium secondary battery electrode by using same, the method comprising the steps of: preparing a current collector; forming an electrode active material layer on the current collector so as to obtain a laminated electrode body; and rolling the electrode active material layer, wherein the rolling allows the laminated electrode body to be passed between a first rolling roller and a second rolling roller, and is performed so that at least a portion of the surface of the first rolling roller or the second rolling roller is coated with a buffer material, and the buffer material makes contact with the electrode active material layer.

The present invention pertains to a binder for a secondary battery positive electrode, to a method of preparation of said electrode and to its use in a secondary battery. The invention also relates to the secondary batteries manufactured by incorporating said electrode.

According to one embodiment of the present invention, an electrode powder for manufacturing a dry electrode for a secondary battery is provided, wherein the powder comprises an active material, a conductive material, and a binder, and has a resistivity of 700 Ω·cm or less when pressurized at a pressure of 50 MPa, a method for manufacturing the same, a method for manufacturing a dry electrode using the same, a dry electrode, a secondary battery including the same, an energy storage device, and a dry electrode manufacturing device.

A dry electrode manufacturing apparatus according to an embodiment of the disclosure includes a supply unit including a discharge port opened at a lower portion thereof and a feeding roller installed below the discharge port, a chute unit providing the electrode powder discharged from the discharge port onto a traveling current collector, and a squeezer flattening the electrode powder provided on the current collector, wherein a density of the flattened electrode powder in a traveling direction of the current collector can be adjusted according to an amount of the electrode powder supplied from the chute unit onto the current collector.