WO1995019052A1 - Appareil de melange continu a vis et d'extrusion d'une pate pour electrode - Google Patents

Appareil de melange continu a vis et d'extrusion d'une pate pour electrode Download PDF

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Publication number
WO1995019052A1
WO1995019052A1 PCT/US1995/000365 US9500365W WO9519052A1 WO 1995019052 A1 WO1995019052 A1 WO 1995019052A1 US 9500365 W US9500365 W US 9500365W WO 9519052 A1 WO9519052 A1 WO 9519052A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
mixing
conductive filler
active cathodic
filler material
Prior art date
Application number
PCT/US1995/000365
Other languages
English (en)
Inventor
Steven M. Mallinson
Scot S. Cheu
Original Assignee
Valence Technology, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valence Technology, Inc. filed Critical Valence Technology, Inc.
Priority to AU15635/95A priority Critical patent/AU1563595A/en
Publication of WO1995019052A1 publication Critical patent/WO1995019052A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
    • B29C48/37—Gear pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/41—Intermeshing counter-rotating screws
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0411—Methods of deposition of the material by extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/14—Cells with non-aqueous electrolyte
    • H01M6/18—Cells with non-aqueous electrolyte with solid electrolyte
    • H01M6/181—Cells with non-aqueous electrolyte with solid electrolyte with polymeric electrolytes

Definitions

  • the present invention relates to an apparatus and method for mixing and extruding materials and, more particularly, to an apparatus and method for mixing and extruding a material for use as an electrode layer in a battery having a laminated electrode layer.
  • the materials for forming a cathode layer of the laminate may be mixed in batches in a chamber, and with a device such as a double-planetary mixer, by a process that has proven satisfactory for limited production.
  • the cathode material is formed from a mixture of active cathodic material (usually a V 6 O 13 or V 3 O g material), a conductive filler material (usually carbon particles), and an ionically conductive electrolyte material.
  • the mixture of active cathodic material, conductive filler material, and electrolyte material is heated in the chamber to a temperature sufficient to melt materials comprising the electrolyte material so that they can be intimately mixed with the cathodic material and the conductive filler material.
  • the mixer apparatus is removed from the chamber, and a plunger apparatus compresses the mixed material through an orifice in the chamber and to a metering pump, which then transports the mixture to an extruder through which it is extruded onto an application site, usually a substrate upon which the cathode layer is coated.
  • the present invention generally speaking, provides an apparatus and a method for continuous production of cathode material for being coated in a layer on a substrate.
  • an apparatus for the production of cathode material includes means for mixing an active cathodic material and a conductive filler material with an electrolyte material such that intimate mixing occurs between the active cathodic material, the conductive filler material, and the electrolyte material and such that a homogeneous mixture is formed.
  • the apparatus further includes means for pressurizing the mixed active cathodic material, conductive filler material, and electrolyte material to a constant outlet pressure.
  • the mixing means and the pressurizing means are defined by respective sections of a common member for the continuous intimate mixture and pressurization of active cathodic material, conductive filler material, and electrolyte material.
  • the mixing means and the pressurizing means are arranged sequentially in an advancing direction of the apparatus.
  • the common member comprises a screw disposed in a barrel.
  • a method for continuous intimate mixture and pressurization of cathode material is disclosed.
  • An active cathodic material and a conductive filler material are mixed with an electrolyte material such that intimate mixing and homogenization occurs between the active cathodic material, the conductive filler material, and the electrolyte material.
  • the mixed active cathodic material, conductive filler aterial, and electrolyte material are pressurized to a constant outlet pressure. The mixing and pressurizing steps occur continuously and simultaneously.
  • Figure 1 is a schematic view of a continuous screw mixer according to a first embodiment of the present invention
  • Figure 2 is a schematic view of a continuous screw mixer according to a second embodiment of the present invention.
  • Figure 3 is a schematic view of a screw for use with a continuous screw mixer according to a third embodiment of the present invention.
  • Figure 4 is a schematic view of a screw for use with a continuous screw mixer according to a fourth embodiment of the present invention.
  • Figure 5 is a schematic view of a screw for use with a continuous screw mixer according to a fifth embodiment of the present invention.
  • Figure 6 is a schematic view of a screw for use with a continuous screw mixer according to a sixth embodiment of the present invention.
  • Figure 7 is a schematic view of a screw for use with a continuous screw mixer according to a seventh embodiment of the present invention
  • Figure 8 is a block diagram of a thickness control apparatus according to an embodiment of the present invention.
  • the cathode material (which is formed from intimately mixed active cathodic material, conductive filler material, and electrolyte material) has a paste-like consistency, having a viscosity in the range of 1,000,000 centipoise, and must be pressurized by the plunger to an extremely high pressure, usually approximately 500 p.s.i., in order for a metering pump, usually a gear pump, to be able to transport the cathode material at a desired feed rate.
  • the pressures necessary for transport of the mixed material out of the mixing chamber to a substrate can require complex hydraulic or pneumatic equipment.
  • an apparatus 21 for continuous intimate mixing and homogenization and for continuous pressurization of cathode materials includes a zone or portion 23 for, primarily, blending (hereinafter refe ⁇ ed to as the blending portion) together an active cathodic material 25 with a conductive filler material 27.
  • the active cathodic material 25 and the conductive filler material 27 are fed to the apparatus through one or more inlets 29.
  • the apparatus 21 further includes a zone or portion 31 for, primarily, mixing (hereinafter refe ⁇ ed to as the mixing portion) a blend 33 comprising the previously-fed active cathodic material 25 and conductive filler material 27 with an electrolyte material 35 such that intimate mixing occurs between the blend and the electrolyte material.
  • the electrolyte material 35 is fed to the mixing portion 31 through a secondary inlet 37.
  • the apparatus 21 still further includes a zone or portion 39 for, primarily, pressurizing (hereinafter referred to as the pressurizing portion) the mixture of cathode material 41 comprising the blend 33 and the electrolyte material 35 to a constant pressure at the outlet 43 of the apparatus.
  • the blending portion 23, the mixing portion 31, and the pressurizing portion 39 are sequential in an advancing direction A (shown by an arrow) of the apparatus 21.
  • the cathode material 41 is formed from a homogenous mixture of active cathodic material 25 (usually a V 6 O 13 or V 3 O 8 material), a conductive filler material 27 (usually carbon particles), and an ionically conductive electrolyte material 35 that are intimately and homogeneously mixed.
  • active cathodic material 25 usually a V 6 O 13 or V 3 O 8 material
  • conductive filler material 27 usually carbon particles
  • ionically conductive electrolyte material 35 that are intimately and homogeneously mixed.
  • the term "homogenized”, as used herein, refers to a condition of the cathode material 41 in which uniform samples, in terms of percent (volume or mass) of active cathodic material 25, conductive filler material 27, and electrolyte material 29 are taken throughout the cathode material.
  • U.S. Patent No. 4,830,939 and U.S. Patent No. 4,925,751 more fully describe preferred active cathodic materials 25, preferred conductive filler materials 27, preferred electrolyte materials 35, and are incorporated by reference to the extent that they disclose such materials.
  • the functions of blending, mixing, and compressing are performed continuously in each of the integrated blending portion 23, mixing portion 31, and compressing portion 39, in order to identify particular portions of the apparatus 21 for the purpose of discussion, the portions are identified by the primary activity occurring therein in the overall operation of the apparatus.
  • the function performed in the blending portion 23, for example, is primarily directed to blending or mixing the active cathodic material 25 and the conductive filler material 27. In the blending portion 23, much of the breaking down of the active cathodic material 25 and the conductive filler material 27 into similarly-sized particles occurs.
  • the function performed in the mixing portion 31, is primarily directed to mixing the already blended or mixed active cathodic material 25 and the conductive filler material 27 with the electrolyte material 35 such that the electrolyte material compounds with the active cathodic material and the conductive filler material.
  • the function performed in the pressurizing portion 39 is primarily directed to pressurizing the mixture of active cathodic material 25, conductive filler material 27, and electrolyte material 35 to a sufficient pressure to exit the apparatus 21.
  • the cathode material 41 formed in the apparatus 21 is pumped, preferably by a metering pump, which is preferably a gear pump 45, through a conduit 47, through an extruder nozzle 49, and onto a substrate 51, which is usually a conductive web or strip of material, such as a copper or nickel web.
  • a metering pump which is preferably a gear pump 45
  • a conduit 47 through an extruder nozzle 49
  • a substrate 51 which is usually a conductive web or strip of material, such as a copper or nickel web.
  • a metering pump permits greater control of flow of cathode material 41 to the substrate 51, as the rate at which cathode material is pumped to the substrate may be controlled by means including a thickness sensor 81 and a microprocessor, shown in Figure 8 and discussed further below.
  • the apparatus 21 preferably includes a screw 53, shown in Figure 1, for continuous mixing and compressing, the screw forming a common member defining the successive zones or portions 23, 31, and 39. Portions of the screw 53 are disposed in the blending portion 23, the mixing portion 31, and the pressurizing portion 39. As the active cathodic material 25, conductive filler material 27, and electrolyte material 35 are moved in an advancing direction A along the length of the screw 53, they are continuously mixed to form the cathode material 41 and compressed for further transport or extrusion beyond the apparatus 21.
  • the screw ' may assume different configurations. In that regard, screws 53, 53A, 53B, 53C, 53D, and 53E are depicted in Figures 1-2, 3, 4, 5, 6, and 7, respectively.
  • the screw 53 is preferably formed as a single piece and no distinct boundaries define the portions of the screw in the different portions 23, 31, 39 of the apparatus 21.
  • the screw 53E may be formed of interconnected segments in which a screw segment 55 is provided in the blending portion 23, a screw segment 57 is provided in the mixing portion 31, and a screw segment 59 is provided in the compressing portion 39.
  • the screw segments 55, 57, 59 may be interconnected by male and female members 55m, 57f, 57m, 59f. While no distinct boundaries define different screw segments 55, 57, and 59 in the single piece screws shown in Figures 1-6, portions of the screw 53 substantially corresponding to the distinct segments shown in Figure 7 are shown by dashed lines in Figures 3-6 for comparative purposes.
  • the screw 53 is rotated inside of a ba ⁇ el 61 by a drive means, which preferably includes a variable speed electric motor 63, so that material is advanced in the advancing direction A.
  • a drive means which preferably includes a variable speed electric motor 63, so that material is advanced in the advancing direction A.
  • the screw section 55 of the blending portion 23 is preferably formed with a smaller minor diameter dj than the minor diameter d 2 of the screw section 57 of the mixing portion 31 or the minor diameter d 3 of the screw section 59 of the pressurizing portion 39 so that the apparatus 21 is self- feeding.
  • the apparatus is formed such that the volume through which the cathode material 41 passes in the advancing direction either remains constant or decreases to facilitate flow of the cathode material.
  • the cathode material 41 (as well as the active cathodic material 25, the conductive filler material 27, and the electrolyte material 35 that form the cathode material) is a "shearing-thinning" material, meaning that its viscosity decreases as the material is subjected to increasing shear stress. If a shearing-thinning material is compressed, the material becomes less viscous and flows better. If a shearing-thinning material is allowed to expand, however, flow substantially stops at the point of expansion.
  • the void volume between the thread 65 of the screw 53 and the ba ⁇ el 61 is decreased or remains constant in the advancing direction A, thereby preventing the material being mixed and compressed from expanding and stopping flowing.
  • Representative screw thread profiles in which the void volume between the thread 65 and the ba ⁇ el 61 remains constant or decreases are shown in Figures 1-7.
  • the screws 53, 53A, 53B, 53C, and 53E, respectively have minor diameters d d 2 , and d 3 , taken at subsequent points in the advancing direction A, that increase in the advancing direction A to facilitate reduction of the void volume.
  • the axial flight distances D a , D b , . . ., D n of successive turns 65a, 65b, . . ., 65n of the thread 65 of the screws 53 and 53B, shown in Figures 1-2 and 4, respectively, are progressively reduced, and the axial flight distances between successive turns of the threads of the screws 53A and 53E, shown in Figures 3 and 7, respectively, are maintained at a substantially constant distance, to provide a screw in which a void volume between the thread of the screw and a ba ⁇ el is reduced in the advancing direction A.
  • the axial flight distances Derne D b , . . ., D n between successive turns 65a, 65b, . . ., 65n of the thread 65 of the screw 53C, shown in Figure 5, are progressively increased, to reduce the void volume between the thread of the screw and a ba ⁇ el in the advancing direction
  • the minor diameter d of the screw 53D, shown in Figure 6, is held substantially constant in the advancing direction A.
  • the void volume may be reduced in the advancing direction A by progressively reducing the axial flight distances D a , D b , . . ., D n of successive turns 65a, 65b, . . ., 65n of the thread of the screw (not shown), or the void volume may be held constant in the advancing direction by holding the axial flight distances constant (not shown). It is understood that the foregoing descriptions of screw profiles are merely illustrative and not intended to encompass all possible combinations of screw profiles in which the screw is shaped such that the void volume between the thread of the screw and a ba ⁇ el decreases or remains constant.
  • the continued shearing of the material being mixed and compressed in the apparatus 21 also ensures that all areas of the volume of material being mixed and compressed receive substantially the same amount of mixing.
  • the lengths of the sections 55, 57, and 59 and the thread profile of the screw 53-53E are selected so that more or less blending, mixing, and compression can be accomplished for a particular desired result, and so that the mean sizes of particles of conductive filler material 27 are optimized.
  • the apparatus 21 is preferably provided with a means 67 for heating the material being mixed and compressed above the melting point of the electrolyte material 35.
  • the heating means 67 preferably includes a resistance heating element 69 a ⁇ anged around or adjacent to the barrel 61 of the apparatus 21, however, core heating elements (not shown) disposed in the screw 53 or in the ba ⁇ el or other heating techniques may be used.
  • the heating means 67 is arranged to heat a portion of the apparatus
  • the heating means 67 is preferably arranged to heat a portion of the apparatus 21 subsequent, in the advancing direction A, to the secondary inlet 37 through which the electrolyte material 35 is introduced.
  • the axial flight distances are also selected to optimize the residence time of the material being blended, mixed, and compressed in the apparatus 21 and in the particular portions 23, 31, 39 of the apparatus. For example, if the axial flight distances D a , D b , . . ., D n of successive turns 65a, 65b, . . ., 65n of the thread 65 of the screw 53 to ensure that the void volume between the thread and a ba ⁇ el decreases or remains constant in the advancing direction of the screw, the axial flight distances are also selected to optimize the residence time of the material being blended, mixed, and compressed in the apparatus 21 and in the particular portions 23, 31, 39 of the apparatus. For example, if the axial flight distances D a , D b , . ., D n of successive turns 65a, 65b, . . ., 65n of the thread 65 of the screw 53 to ensure that the void volume between the thread and a ba ⁇ el decreases or remains constant in the advancing direction of the screw,
  • the axial flight distances D a , D b , . . ., D n are increased in the advancing direction A, as shown in the screw 53C in Figure 5, then there will be an even further decreased residence time of material in the advancing direction, and the material is moved past the portions of the screw 53 having the longer axial flight distances even more quickly.
  • the axial flight distances are decreased, as shown in the screws 53, 53A, 53B, and 53D in Figures 1-2, 3, 4, and 6, respectively, the material will reside in the portions of the screw 53 having the shorter axial flight distances for more turns of the screw.
  • D n are selected such that the residence time of the material is sufficiently long in the portion of the apparatus 21 near the heating means 67 to melt the electrolyte material 35.
  • the axial flight distances D a , D b , . . ., D n are selected to optimize the degree of breakage of the filaments.
  • One or more stationary pins 71 may be provided in the barrel 61 to extend substantially to the minor diameter d of the screw 53 to clean out the thread 65.
  • the screw 53 is further formed with a circumferential groove or break 73, i.e., a cut flight, through the thread 65 in a location on the screw co ⁇ esponding to the location on the barrel of each stationary pin 71 so that the screw is able to rotate without interference from the stationary pin.
  • at least one stationary pin 71 is hollow and forms a portion of the secondary inlet 37 and is provided with an opening such as a bore 75 for facilitating introduction of electrolyte material 35 into the blend 33 of active cathodic material 25 and conductive filler material 27. Sufficient space is provided between the end of the hollow pin 71 and the bottom of the groove or break 73 so that electrolyte material 35 is able to flow out of the bore
  • Another self-cleaning mechanism that may be used in conjunction with or independently of the stationary pin 71 is a secondary screw 77, shown in Figure 2.
  • the secondary screw 77 is formed with thread 79 for intermeshing with the thread 65 of the primary screw 53 to continually clean out the thread as the two screws rotate side by side.
  • the foregoing self-cleaning mechanisms i.e., the stationary pin 71 and the secondary screw 77, further facilitate intimate mixing of the components of the cathode material 41 by causing additional shearing of the material.
  • compressed cathode material 41 exits the pressurizing portion 39 of the apparatus 21 and is either extruded directly onto the substrate 51 or, preferably, flows through the outlet 43 of the apparatus and onto the gear pump 45 through the conduit 47. From the gear pump 45, the cathode material 41 flows through an extruder nozzle 49 and onto the substrate 51.
  • the amount of cathode material 41 that is extruded onto the substrate 51 may, from time to time, have to be modified to adjust the thickness of the cathode material on the substrate.
  • a thickness measuring apparatus 81 is provided to measure the thickness of the cathode material 41 on the substrate 51.
  • the thickness measuring apparatus 81 provides a signal to a microprocessor 82 to indicate that too much or too little cathode material 41 is being applied to the substrate 51.
  • the microprocessor provides a signal to the gear pump 45 to cause the gear pump to slow down or speed up to advance more or less cathode material 41 to the substrate 51, or provides a signal to the variable speed electric motor 63 that turns the screw 53 to cause the screw to turn more or less quickly to advance more or less cathode material to the gear pump or the substrate, or provides a signal to both the gear pump and the variable speed electric motor to cause them both to speed up or slow down.
  • the active cathodic material and the conductive filler material are blended together so that they are thoroughly dispersed.
  • the blended active cathodic material 25 and conductive filler material 27 form a blend 33 that is mixed with an electrolyte material 35 such that intimate mixing between the cathodic material, the conductive filler material, and the electrolyte material occurs.
  • the mixed active cathodic material 25, conductive filler material 27, and electrolyte material 35 form cathode material that is pressurized to a constant pressure at an outlet 43 of a mixing and pressurizing apparatus 21.
  • the pressurized cathode material 41 is transported through a conduit 47 by a metering pump such as a gear pump 45 and passes through an extruder nozzle 49 to a substrate 51.
  • the extruded cathode material 41 is spread over the substrate 51 in a constant thickness layer.
  • the thickness of the constant thickness layer is measured and monitored for consistency and extrusion rates of cathode material 41 are adjusted to maintain constant thickness by adjusting the rate at which the gear pump 45 transports the cathode material or by adjusting the rate at which the screw 53 turns to transport the material, or by adjusting both the rate at which the gear pump and the screw operate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention a pour objet un appareil (21) conçu pour le mélange intime continu de matières destinées à former une cathode d'un accumulateur. Ledit appareil comprend une zone (23) prévue pour le mélange d'une matière active cathodique (25) et d'une matière de remplissage conductrice (27), ces deux matières étant mélangées avec une électrolyte (35) dans une zone (31) permettant d'effectuer un mélange intime entre la matière active cathodique (25), la matière de remplissage conductrice (27) et l'électrolyte (35), ledit mélange étant maintenu à pression constante à la sortie (43) de l'appareil.
PCT/US1995/000365 1994-01-07 1995-01-09 Appareil de melange continu a vis et d'extrusion d'une pate pour electrode WO1995019052A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15635/95A AU1563595A (en) 1994-01-07 1995-01-09 Continuous screw mixing and extruding of an electrode paste

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17900394A 1994-01-07 1994-01-07
US08/179,003 1994-01-07

Publications (1)

Publication Number Publication Date
WO1995019052A1 true WO1995019052A1 (fr) 1995-07-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/000365 WO1995019052A1 (fr) 1994-01-07 1995-01-09 Appareil de melange continu a vis et d'extrusion d'une pate pour electrode

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AU (1) AU1563595A (fr)
WO (1) WO1995019052A1 (fr)

Cited By (9)

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EP1118447A2 (fr) * 2000-01-19 2001-07-25 Maag Pump Systems Textron AG Appareil pour l'alimentation de matériaux élastomériques et utilisation d'un tel appareil
WO2004051769A2 (fr) * 2002-12-02 2004-06-17 Avestor Limited Partnership Procede de fabrication par co-extrusion de cellule electrochimique a couche mince pour batteries au lithium-polymere et appareil associe
JP2014050784A (ja) * 2012-09-06 2014-03-20 Toyota Motor Corp 電極ペースト製造装置および電極ペースト製造方法
JP2015069776A (ja) * 2013-09-27 2015-04-13 トヨタ自動車株式会社 非水電解質２次電池の電極用ペーストの製造方法
WO2017124098A1 (fr) * 2016-01-15 2017-07-20 24M Technologies, Inc. Systèmes et procédés de mélange par infusion d'une électrode à base de suspension concentrée
CN112072063A (zh) * 2020-09-15 2020-12-11 惠州亿纬锂能股份有限公司 一种极片成型的挤出头及包括其的成型装置及其成型方法和制备方法
DE102021121392A1 (de) 2021-08-18 2023-02-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung und Verfahren zur Herstellung einer Beschichtung
CN117139066A (zh) * 2023-10-30 2023-12-01 宁德时代新能源科技股份有限公司 涂布机构和涂布装置
WO2024016210A1 (fr) * 2022-07-20 2024-01-25 宁德时代新能源科技股份有限公司 Appareil de fabrication de séparateur et dispositif de fabrication de feuille d'électrode

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023456A (en) * 1959-08-03 1962-03-06 Dow Chemical Co Extruder apparatus
US3060512A (en) * 1955-06-14 1962-10-30 Us Rubber Co Solventless extrusion method for making shaped microporous articles from thermoplastic resinous material
US3577494A (en) * 1969-09-05 1971-05-04 Dow Chemical Co Method for the preparation of extrudable synthetic resinous materials
US4384837A (en) * 1980-07-08 1983-05-24 Oryza Oil & Fat Chemical Co., Ltd. Apparatus for pretreatment for extracting crude oil from rice bran
US4648827A (en) * 1983-09-30 1987-03-10 Netsal-Maschinen Ag Screw plastifying and conveying device of an injection molding machine for plastics
US4976904A (en) * 1989-04-20 1990-12-11 Energy Research Corporation Method and apparatus for continuous formation of fibrillated polymer binder electrode component
US5127741A (en) * 1990-12-14 1992-07-07 Hermann Berstorff Maschinenbau Gmbh High-performance extruder
US5156790A (en) * 1991-07-25 1992-10-20 Union Carbide Chemicals & Plastics Technology Corporation Method for extruding ethylene polymers
US5316556A (en) * 1993-03-30 1994-05-31 Valence Technology, Inc. Apparatus and method for extruding shear thinning material

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060512A (en) * 1955-06-14 1962-10-30 Us Rubber Co Solventless extrusion method for making shaped microporous articles from thermoplastic resinous material
US3023456A (en) * 1959-08-03 1962-03-06 Dow Chemical Co Extruder apparatus
US3577494A (en) * 1969-09-05 1971-05-04 Dow Chemical Co Method for the preparation of extrudable synthetic resinous materials
US4384837A (en) * 1980-07-08 1983-05-24 Oryza Oil & Fat Chemical Co., Ltd. Apparatus for pretreatment for extracting crude oil from rice bran
US4648827A (en) * 1983-09-30 1987-03-10 Netsal-Maschinen Ag Screw plastifying and conveying device of an injection molding machine for plastics
US4976904A (en) * 1989-04-20 1990-12-11 Energy Research Corporation Method and apparatus for continuous formation of fibrillated polymer binder electrode component
US5127741A (en) * 1990-12-14 1992-07-07 Hermann Berstorff Maschinenbau Gmbh High-performance extruder
US5156790A (en) * 1991-07-25 1992-10-20 Union Carbide Chemicals & Plastics Technology Corporation Method for extruding ethylene polymers
US5316556A (en) * 1993-03-30 1994-05-31 Valence Technology, Inc. Apparatus and method for extruding shear thinning material

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1118447A2 (fr) * 2000-01-19 2001-07-25 Maag Pump Systems Textron AG Appareil pour l'alimentation de matériaux élastomériques et utilisation d'un tel appareil
EP1118447A3 (fr) * 2000-01-19 2003-05-02 Maag Pump Systems Textron AG Appareil pour l'alimentation de matériaux élastomériques et utilisation d'un tel appareil
WO2004051769A2 (fr) * 2002-12-02 2004-06-17 Avestor Limited Partnership Procede de fabrication par co-extrusion de cellule electrochimique a couche mince pour batteries au lithium-polymere et appareil associe
WO2004051769A3 (fr) * 2002-12-02 2005-02-03 Avestor Ltd Partnership Procede de fabrication par co-extrusion de cellule electrochimique a couche mince pour batteries au lithium-polymere et appareil associe
US7700019B2 (en) 2002-12-02 2010-04-20 Bathium Canada Inc. Co-extrusion manufacturing process of thin film electrochemical cell for lithium polymer batteries and apparatus therefor
US9630344B2 (en) 2012-09-06 2017-04-25 Toyota Jidosha Kabushiki Kaisha Electrode paste production device and electrode paste production method
CN103682252A (zh) * 2012-09-06 2014-03-26 丰田自动车株式会社 电极浆料制造装置和电极浆料制造方法
JP2014050784A (ja) * 2012-09-06 2014-03-20 Toyota Motor Corp 電極ペースト製造装置および電極ペースト製造方法
JP2015069776A (ja) * 2013-09-27 2015-04-13 トヨタ自動車株式会社 非水電解質２次電池の電極用ペーストの製造方法
WO2017124098A1 (fr) * 2016-01-15 2017-07-20 24M Technologies, Inc. Systèmes et procédés de mélange par infusion d'une électrode à base de suspension concentrée
US11005087B2 (en) 2016-01-15 2021-05-11 24M Technologies, Inc. Systems and methods for infusion mixing a slurry based electrode
US11961990B2 (en) 2016-01-15 2024-04-16 24M Technologies, Inc. Systems and methods for infusion mixing a slurry-based electrode
CN112072063A (zh) * 2020-09-15 2020-12-11 惠州亿纬锂能股份有限公司 一种极片成型的挤出头及包括其的成型装置及其成型方法和制备方法
DE102021121392A1 (de) 2021-08-18 2023-02-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung und Verfahren zur Herstellung einer Beschichtung
WO2024016210A1 (fr) * 2022-07-20 2024-01-25 宁德时代新能源科技股份有限公司 Appareil de fabrication de séparateur et dispositif de fabrication de feuille d'électrode
CN117139066A (zh) * 2023-10-30 2023-12-01 宁德时代新能源科技股份有限公司 涂布机构和涂布装置
CN117139066B (zh) * 2023-10-30 2024-04-05 宁德时代新能源科技股份有限公司 涂布机构和涂布装置

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