WO2014050835A1 - 二次電池用粉体供給装置および電極体の製造装置 - Google Patents
二次電池用粉体供給装置および電極体の製造装置 Download PDFInfo
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- WO2014050835A1 WO2014050835A1 PCT/JP2013/075777 JP2013075777W WO2014050835A1 WO 2014050835 A1 WO2014050835 A1 WO 2014050835A1 JP 2013075777 W JP2013075777 W JP 2013075777W WO 2014050835 A1 WO2014050835 A1 WO 2014050835A1
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- powder
- rotor
- supplied
- supply device
- secondary battery
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
- B05C19/04—Apparatus specially adapted for applying particulate materials to surfaces the particulate material being projected, poured or allowed to flow onto the surface of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
- B05C19/06—Storage, supply or control of the application of particulate material; Recovery of excess particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T19/00—Devices providing for corona discharge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/5313—Means to assemble electrical device
- Y10T29/532—Conductor
- Y10T29/53204—Electrode
Definitions
- the present invention relates to a technology for a secondary battery powder supply device and an electrode body manufacturing device.
- Patent Document 1 discloses a powder supply device that includes a hopper-like chute into which powder is charged, a rolling member disposed in the chute, and a mesh body disposed below the chute. ing. And the powder supply apparatus currently disclosed by patent document 1 gives a vibration to the chute
- An object of the present invention is to provide an apparatus for manufacturing an electrode body that is provided with the apparatus for supplying powder for a secondary battery and that can efficiently manufacture an electrode body.
- a powder supply device for a secondary battery includes a case having a storage part as a gap for storing powder as a supply object, and a rectangular opening communicating with the storage part, The opening is provided at the lower end of the case, discharges the powder from the opening, and is horizontally displaced vertically below the opening.
- a plurality of uneven portions or a plurality of convex portions are formed, and the rotor is The rotor is axially supported by the reservoir so as to be parallel and horizontal to the width direction of the opening in a plan view, and the outer periphery of the rotor and the reservoir A gap serving as a powder transfer path is formed between the inner surface and the inner surface of the rotor so that the distance between them is constant, and the mesh body is disposed at a constant distance from the outer peripheral portion of the rotor. ing.
- the powder supply device for a secondary battery it is preferable to further include a leveling mechanism for leveling the upper surface of the powder supplied to the reservoir and deposited on the rotor.
- the rotor is a substantially cylindrical roller member, and the plurality of uneven portions are formed on an outer peripheral surface of the rotor and the outer peripheral surface.
- the plurality of groove portions are arranged in parallel to the axial direction of the roller member and at equal intervals in the circumferential direction.
- the groove is formed in an arc shape in a cross section orthogonal to the axial direction of the rotor.
- a discharge electrode for corona discharge is further provided to the mesh body, and the discharge electrode is disposed below the mesh body.
- An electrode body manufacturing apparatus is an electrode body manufacturing apparatus including the above-described secondary battery powder supply apparatus, wherein the powder forms an electrode body constituting a secondary battery.
- the material to be supplied is an electrode foil for forming an electrode body constituting a secondary battery, and the powder supplied to the surface of the material to be supplied is the thickness of the material to be supplied.
- a powder compression means for compressing in the direction is provided.
- the powder supply device for a secondary battery according to the present invention can supply a fixed amount of powder to a material to be supplied regardless of the state of the powder.
- the powder supply device for a secondary battery according to the present invention it is possible to prevent the distribution of the powder supplied to the material to be supplied from being biased due to clogging of the mesh body.
- an electrode body can be efficiently manufactured by a dry method. Thereby, shortening of the manufacturing process of a secondary battery and reduction of the manufacturing cost of a secondary battery are realizable.
- FIG. 1 is a front cross-sectional view showing a first embodiment of a powder supply apparatus according to the present invention.
- 1 is a side cross-sectional view showing a first embodiment of a powder supply apparatus according to the present invention.
- the elements on larger scale which show the structure around the discharge port in a fixed quantity supply part.
- It is a figure which shows the rotor which comprises a fixed supply part, (a) is a side view, (b) is a side surface partial enlarged view.
- the powder supply apparatus 1 according to the first embodiment of the present invention is such that the number of supply systems of the powder 10 (that is, the number of powder discharge ports) is only one system.
- the direction of arrow A shown in FIGS. 1 and 2 is defined as vertically upward, and the direction of arrow B is defined as vertically downward.
- the powder supply apparatus 1 is set as the structure which supplies powder from the upper direction toward the downward direction.
- the powder supply apparatus 1 supplies the powder 10 quantitatively to the material 5 to be supplied with the powder 10.
- the apparatus includes a fixed quantity supply unit 2, a powder supply unit 3, and a powder amount detection sensor 4.
- the material 5 to be supplied with the powder 10 is supplied at a constant speed in a predetermined feed direction ⁇ . Has moved.
- the powder supply device 1 the amount of the powder 10 stored in the quantitative supply unit 2 is detected by the powder amount detection sensor 4, and when the powder 10 is reduced, The powder replenishing unit 3 replenishes the powder 10 to the fixed amount supply unit 2.
- an ultrasonic sensor is employed as the powder amount detection sensor 4.
- the powder amount detection sensor 4 it is preferable to use a sensor capable of detecting the top level of the powder 10 in a non-contact manner, such as an ultrasonic sensor or an infrared sensor.
- the fixed quantity supply unit 2 is a part configured to continuously supply the fixed quantity of powder 10 to the material 5 to be supplied with the powder 10, and includes a case 6 and a rotor 7. , A mesh body 8 and a leveling mechanism 9 are provided.
- the fixed amount supply unit 2 is arranged immediately below the powder supply unit 3 and is configured to receive the powder 10 falling from the powder supply unit 3 in the case 6. Then, the fixed amount supply unit 2 drops the powder 10 discharged from the case 6 onto the material to be supplied 5 that is moving in the vertical lower direction of the case 6 in the predetermined feeding direction ⁇ , and the powder 10 is provided.
- “falling” of the powder 10 there is an aspect in which the powder 10 is naturally dropped by its own weight, or an aspect in which the powder 10 is dropped while being pressed by the rotor 7.
- the case 6 is a container for temporarily storing the powder 10 supplied from the powder replenishing unit 3, and forms a storage unit 6 a that is a gap for storing the powder 10.
- an introduction port 6b that is an opening for introducing the powder 10 is formed at the upper end of the reservoir 6a, and the powder 10 is discharged at the lower end of the reservoir 6a.
- a discharge port 6c as an opening is formed.
- the discharge port 6 c has a length direction (short side direction in the present embodiment) as L and a width direction (long side direction in the present embodiment) as W. It is formed as a rectangular opening and communicates with the reservoir 6a.
- the lower end surface of the discharge port 6c is formed horizontally, and the amount of the powder 10 discharged from the discharge port 6c is configured to be uniform at each part of the discharge port 6c.
- the discharge port 6c has a length direction parallel to the feed direction ⁇ of the material to be supplied 5 and a width direction perpendicular to the feed direction ⁇ of the material to be supplied 5 in plan view. It is formed as follows.
- “quantitative” as used in the present embodiment means that the weight per unit area of the powder 10 discharged from the discharge port 6c is equal in any part of the discharge port 6c. That is, the powder supply apparatus 1 is configured such that the powder 10 supplied from the quantitative supply unit 2 toward the material to be supplied 5 adheres to the supply surface of the material 5 to be supplied per unit area on the supply surface. The weight of the powder 10 is configured to be constant.
- the rotor 7 is disposed in the reservoir 6 a of the case 6.
- the rotor 7 in this embodiment is a substantially cylindrical roller member.
- the rotor 7 is disposed such that the shaft portion 7c is parallel to the width direction of the discharge port 6c and is orthogonal to the feed direction ⁇ of the material to be supplied 5 in plan view, and around the shaft portion 7c. It is supported horizontally in a rotatable manner.
- a plurality of groove portions 7b, 7b,... are formed on the outer peripheral surface 7a of the rotor 7 in parallel to the axial center direction of the rotor 7, and are arranged at equal intervals in the circumferential direction of the rotor 7. .
- the rotor 7 is configured so that the powder 10 can be transferred in the rotation direction according to the rotation of the rotor 7 by allowing the powder 10 to enter the grooves 7b, 7b. That is, on the outer peripheral portion of the rotor 7, a plurality of concave and convex portions are formed at equal intervals in the circumferential direction by the outer peripheral surface 7a and the groove portion 7b.
- the bottom of the reservoir 6a has an arc shape that is concentric with the outer circumferential surface 7a of the rotor 7 (that is, the shaft portion 7c is the axial center position), and the outer circumferential surface 7a. And a reservoir 6a are formed with a uniform gap so that they are separated by a distance d1.
- the quantitative supply unit 2 suppresses the occurrence of bias in the flow of the powder 10 when the powder 10 is transferred along the gap between the storage unit 6 a of the case 6 and the rotor 7. To do.
- the outer peripheral surface 7a of the rotor 7 is separated from the lower end position of the discharge port 6c of the case 6 by a distance d2.
- the rotor 7 is arrange
- the accumulated powder 10 can be transferred to the lower side of the rotor 7 (that is, the discharge port 6c side).
- the leveling mechanism 9 is a mechanism for leveling the powder 10 accumulated in a mountain shape above the rotor 7 and making the top end substantially flat. And a pair of slide rails 9a and 9a and a leveling plate 9b.
- the mesh body 8 as a member for equally dividing the discharge port 6c into a mesh is formed on the entire surface of the discharge port 6c below the discharge port 6c. It is provided so as to cover.
- the mesh body 8 is disposed so as to be separated from the outer peripheral surface 7a of the rotor 7 by a distance d2.
- the discharge electrode 11 which is a means for removing the powder 10 clogged in the mesh body 8 is provided below the mesh body 8. ing.
- the discharge electrode 11 can perform corona discharge on the mesh body 8, and is disposed in a range corresponding to the width W of the discharge port 6c.
- the discharge electrode 11 discharges continuously or periodically with respect to the mesh body 8, whereby the powder 10 clogged in the mesh body 8 can be removed. Thereby, it can prevent that the quantity of the powder 10 supplied by the powder supply apparatus 1 fluctuates, and can prevent that the distribution of the powder 10 supplied via the mesh body 8 is biased.
- the powder supply apparatus 1 includes the discharge electrode 11 for performing corona discharge on the mesh body 8 below the mesh body 8. With such a configuration, it is possible to prevent the distribution of the powder 10 supplied to the material to be supplied 5 from being biased due to clogging of the mesh body 8.
- each groove portion 7 b formed on the outer peripheral surface 7 a of the rotor 7 has an arc shape in a cross section orthogonal to the axis of the rotor 7.
- the powder 10 that has entered the groove parts 7b, 7b,... Is compressed between the storage part 6a and the groove parts 7b, 7b,.
- the powder 10 can be easily detached from the grooves 7b, 7b, and so on without adhering to the grooves 7b, 7b, and so on. If the powder 10 adheres to the inside of the groove portion 7b, the amount of the powder 10 dropped into the discharge port 6c in accordance with the rotation of the rotor 7 will vary.
- the groove portion 7 b is formed in parallel to the axis of the rotor 7. If the groove portion 7b is formed so as to be inclined with respect to the axial direction of the rotor 7, stress acting on the axial direction is applied to the powder 10 that has entered the groove portion 7b as the rotor 7 rotates. Therefore, the distribution of the powder 10 in the width direction of the discharge port 6c is biased, and it becomes difficult to discharge the powder 10 from the discharge port 6c evenly.
- the powder replenishing unit 3 is a part for replenishing the powder 10 with respect to the quantitative supply unit 2 and includes a frame 12, a mesh body 13, and a vibration generator 14.
- the frame 12 is a substantially rectangular frame member having an opening that penetrates in the vertical direction, and a mesh body 13 that covers the entire opening of the lower surface is attached.
- a vibration generator 14 is attached to the frame 12.
- the frame 12 and the mesh body 13 can be vibrated in a predetermined direction with a predetermined amplitude.
- the vibration generator 14 by operating the vibration generator 14 and supplying the powder 10 into the frame 12 while vibrating the frame 12 and the mesh body 13, the supplied powder 10 is sieved by the mesh body 13.
- the powder 10 can be supplied to the quantitative supply unit 2 disposed below the powder supply unit 3.
- the powder 10 can be deposited according to the height of the frame 12, and the powder is replenished according to the ON / OFF of the vibration generator 14.
- the supply of the powder 10 from the unit 3 to the quantitative supply unit 2 can be turned ON / OFF.
- a powder amount detection sensor indicates that the deposition height (top position) of the powder 10 deposited on the rotor 7 has dropped to the lower limit level LL. 4
- the vibration generator 14 is operated for a predetermined time by a control device (not shown), and the powder supply unit 3 supplies a predetermined amount of the powder 10 to the quantitative supply unit 2.
- the powder 10 is piled up just below the powder replenishment unit 3, so that the vibration generator 14 is controlled by a control device (not shown).
- the leveling mechanism 9 is operated and the leveling plate 9b is reciprocated in the horizontal direction so that the top end of the accumulated powder 10 is leveled substantially horizontally.
- the leveling mechanism 9 is stopped by a control device (not shown). Yes.
- the height of the powder 10 deposited above the rotor 7 is adjusted to a predetermined level (that is, a range from the upper limit level HL to the lower limit level LL) over the entire length of the rotor 7, and By leveling the top end of the powder 10 substantially horizontally, the pressure acting on the powder 10 due to the weight of the powder 10 can be made substantially uniform in each part of the discharge port 6c. Thereby, according to rotation of the rotor 7, a fixed amount of powder 10 can be discharged from the discharge port 6c.
- a predetermined level that is, a range from the upper limit level HL to the lower limit level LL
- the powder supply device 1 in which the rotor 7 that is a substantially cylindrical roller member is provided in the quantitative supply unit 2 is illustrated, but the rotor provided in the powder supply device 1 is, for example, A rotor 17 having a hollow structure as shown in FIG.
- a rotor 17 which is another embodiment of the rotor includes a rotating shaft 17c, a pair of plates 17b and 17b fixed to both ends in the length direction of the rotating shaft 17c, and a pair.
- the blade member 17a protrudes outward from the outer peripheral portion of the plate 17b. That is, on the outer peripheral portion of the rotor 17, a plurality of convex portions are formed at equal intervals by the blade members 17a, 17a.
- the quantitative supply unit including the rotor 17 scrapes the powder 10 existing near the inner surface of the reservoir 6a at the top and sides of the blade member 17a as the rotor 17 rotates about the rotation shaft 17c.
- the powder 10 is configured to be transferred.
- FIG. 6B plate members 18a, 18a,... For scraping the powder 10 are attached to an endless belt-like rotor 18 that circulates on a substantially oval track. It is good.
- the powder in the case is not a structure in which a fixed amount of powder is discharged using a rotor, but the vibrator 19 which is a comb-like member is reciprocally oscillated in the horizontal direction. It is good also as a structure which disperse
- the powder supply apparatus 1 provided with the powder supply part 3 which is a site
- the powder supply part 3 It is also possible to use the quantitative supply unit 2 instead of the above. That is, the two fixed quantity supply units 2 and 2 are arranged so as to be stacked one above the other, and the fixed quantity powder 10 is supplied from the upper fixed quantity supply unit 2 to the lower fixed quantity supply unit 2. Is possible. In such a case, it is possible to expect an effect that the supply amount of the powder 10 to the material to be supplied 5 can be made more accurate and constant by accurately controlling the replenishment amount of the powder 10 to the lower quantitative supply unit 2.
- the powder supply apparatus 1 is a storage portion 6a that is a gap for storing the powder 10 that is a supply object, and a rectangular opening that communicates with the storage portion 6a. And a discharge port 6c.
- the discharge port 6c is provided at the lower end of the case 6, discharges the powder 10 from the discharge port 6c, and vertically below the discharge port 6c.
- the powder 10 is supplied while being dropped from the discharge port 6c to the supply material 5 that is the supply target of the powder 10 that moves parallel and horizontally to the length direction, A rotor 7 (or the rotor 17) for dropping the powder 10 into the discharge port 6c and a mesh body 8 for covering the lower end of the discharge port 6c and allowing the powder 10 dropped into the discharge port 6c to pass therethrough.
- the part includes an outer peripheral surface 7a and grooves 7b, 7b (or a plurality of concave and convex parts) that are parallel to the axial center direction of the rotor 7 (or the rotor 17) and at equal intervals in the circumferential direction.
- the rotor 7 has an axis that is parallel to the width direction of the discharge port 6c and is horizontal in plan view.
- the storage unit 6a is rotatably supported, and the powder 10 is transferred between the outer peripheral surface 7a of the rotor 7 and the inner surface of the storage unit 6a so that they are separated by a distance d1.
- a gap is formed, and the mesh body 8 is arranged at a distance d2 from the outer peripheral surface 7a of the rotor 7.
- the powder supply device 1 is a leveling device for leveling the upper surface of the powder 10 supplied to the reservoir 6a and deposited on the upper portion of the rotor 7 as a roller member substantially horizontally.
- a mechanism 9 is further provided.
- the rotor 7 is a substantially cylindrical roller member, and the plurality of concave and convex portions are connected to the outer peripheral surface 7a of the rotor 7 and the rotation.
- the groove portion 7b is formed in an arc shape in a cross section orthogonal to the axial direction of the rotor 7 as a roller member.
- the powder supply apparatus 21 according to the second embodiment of the present invention has a plurality of supply systems of powder 10 (three systems in this embodiment), and the material to be supplied 5
- the layer of the powder 10 supplied to the substrate is multilayered to ensure the thickness of the powder 10 to be attached to the material to be supplied 5 and to allow the powder 10 to be attached more uniformly.
- the supply object that moves at a constant speed in the predetermined feed direction ⁇ .
- the material 5 is a supply target of the powder 10.
- the powder supply device 21 according to the second embodiment of the present invention can supply the powder 10 quantitatively to the material 5 to be supplied with the powder 10.
- a plurality (three in this embodiment) of powder supply devices 1 according to the first embodiment are arranged in series in the direction of the feed direction ⁇ of the material to be supplied 5.
- the phases of the rotors 7, 7, 7 in the quantitative supply units 2, 2, 2 are different from each other.
- the phase of the rotor 7 will be described. As shown in FIG. 8A, 72 grooves 7b, 7b,... Are formed at equal intervals on the outer peripheral surface 7a of the rotor 7 provided in the powder supply device 21 in the circumferential direction. Has been. That is, in the rotor 7, the groove portions 7b, 7b,... Are formed by shifting the angle by 5 degrees. For this reason, in the powder supply apparatus 21, the phases of the three rotors 7, 7, and 7 are 5/3 degrees so that the phases (rotational positions) of the rotor 7 do not become the same within the range of 5 degrees. They are shifted one by one (see FIG. 8B).
- the discharge port in the first quantitative supply unit 2 located on the most upstream side in the feed direction ⁇ of the material to be supplied 5 When the point P of the material to be supplied 5 passes directly below 6c, the first rotor 7 (hereinafter referred to as the rotor 7X) has a phase X shown in FIG. It is configured as follows.
- the second rotor 7 (hereinafter referred to as the second rotor 7) , Described as a rotor 7Y) is configured such that the phase Y shown in FIG. 8B is positioned vertically downward and is different from the phase X of the first rotor 7X.
- the third rotor 7 (Hereinafter, referred to as the rotor 7Z) is configured such that the phase Z shown in FIG. 8B is positioned vertically downward and is different from the phases X and Y of the rotors 7X and 7Y.
- the supply state of the powder 10 is caused by the shape of the rotor 7 by making the phases of the first to third rotors 7X, 7Y, and 7Z different from each other with respect to the same point P in the material 5 to be supplied. Can be prevented, and even when the supply amount of the powder 10 to the material to be supplied 5 is increased, the powder 10 can be supplied without unevenness.
- the grooves 7b, 7b,... are formed at equal intervals by shifting the angle by 5 degrees, and the rotors 7X, 7Y, 7Z are configured to have different phases within the range of 5 degrees.
- the configuration of the rotor 7 in the powder supply device 21 according to the second embodiment of the present invention is not limited to this. That is, the phase difference of the rotor 7 can be determined according to the number of grooves 7 b formed in the rotor 7 and the number of quantitative supply units 2 in the powder supply device 21.
- phase differences of the rotors 7X, 7Y, and 7Z are made equal (5/3 degrees) is exemplified, but the phase differences of the rotors 7X, 7Y, and 7Z need not necessarily be made equal.
- the phases of the rotors 7X, 7Y, and 7Z only need to be different when the same point P passes directly under the discharge ports 6c, 6c, and 6c corresponding to the rotors 7X, 7Y, and 7Z.
- An electrode body manufacturing apparatus 31 provided with the powder supply apparatus 21 which concerns on 2nd embodiment of this invention is demonstrated using FIG.
- An electrode body manufacturing apparatus 31 according to an embodiment of the present invention described here includes the powder supply apparatus 21 according to the second embodiment of the present invention described above, and uses the powder supply apparatus 21.
- the electrode body 40 (positive electrode or negative electrode) constituting the secondary battery is manufactured by a dry method.
- an electrode body manufacturing apparatus 31 is an apparatus for manufacturing an electrode body 40 (positive electrode or negative electrode) constituting a secondary battery, and a powder supply apparatus 21.
- the supplied material 5 used in the electrode body manufacturing apparatus 31 according to the embodiment of the present invention is an electrode foil, and the powder supply apparatus 21 supplies a fixed amount of powder 10 to the surface of the supplied material 5.
- the powder 10 used in the electrode body manufacturing apparatus 31 includes an active material (for example, graphite as a negative electrode active material) that forms the composite layer 41 in the electrode body 40.
- the powder supply device 21 adheres a fixed amount of powder 10 containing an active material to the surface of the material 5 to be supplied in a layered manner with a constant thickness and density.
- the powder compression mechanism 32 is a mechanism for compressing the powder 10 adhered to the surface of the material to be supplied 5 to form a mixture layer 41 in the electrode body 40, and a pair of rollers 32a and 32a. Is provided. A pair of roller 32a * 32a is rotatably supported by the rotating shaft 32b * 32b.
- the powder compression mechanism 32 detects the distance between the rotating shafts 32b and 32b by a sensor (not shown) and inputs it to the control device 33.
- the control device 33 calculates the thickness of the formed mixture layer 41 in real time based on the diameters of the rollers 32a and 32a and the distance between the rotary shafts 32b and 32b.
- the control device 33 controls the rotational speed of the rotors 7, 7, 7 and the operation of the vibration generator 14 based on the calculated thickness of the composite material layer 41, and the composite material layer
- the thickness of 41 is adjusted to fall within a predetermined standard value.
- the electrode body manufacturing apparatus 31 forms the composite material layer 41 by compressing the uniform active material layer formed on the surface of the material to be supplied 5 by the powder compression mechanism 32, and is a dry type
- the electrode body 40 is manufactured by the technique. If such an electrode body manufacturing apparatus 31 is used, various steps for manufacturing an electrode paste (kneading, defoaming, etc.), and a past drying step that has conventionally been required can be omitted. An electrode body can be efficiently manufactured by a dry method.
- the electrode body manufacturing apparatus 31 includes a powder supply apparatus 21, and the powder 10 includes an active material for forming the electrode body 40 constituting the secondary battery,
- the supply material 5 is an electrode foil for forming the electrode body 40 constituting the secondary battery, and compresses the powder 10 supplied to the surface of the supply material 5 in the thickness direction of the supply material 5.
- the powder compression mechanism 32 is further provided. With such a configuration, the electrode body 40 can be efficiently manufactured by a dry method. Thereby, the shortening of the manufacturing process of a secondary battery and the reduction of the manufacturing cost of a secondary battery are realizable.
- the powder supply apparatus 21 (or powder supply apparatus 1) is illustrated as an apparatus for constituting the electrode body manufacturing apparatus 31 for manufacturing the electrode body 40 for secondary batteries.
- the use of the powder supply device 21 (or the powder supply device 1) is not limited to this, and can be used for manufacturing foods, chemicals, medicines, and the like.
- the present invention can be used for a secondary battery powder supply device and an electrode body manufacturing device.
- Powder supply device (first embodiment) DESCRIPTION OF SYMBOLS 2 Constant supply part 3 Powder supply part 4 Powder quantity detection sensor 5 Material to be supplied 6 Case 6a Storage part 6c Discharge port 7 Rotor 7b Groove part 8 Mesh body 9 Leveling mechanism 10 Powder 21 Powder supply apparatus (2nd Embodiment) 31 Electrode body production equipment 32 Powder compression mechanism
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
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Abstract
Description
このような粉体供給装置は、例えば、以下に示す特許文献1に開示されており、公知となっている。
そして、特許文献1に開示されている粉体供給装置は、粉体を投入したシュートに振動を与えるとともに、その振動で転動部材を転動させて、さらに、メッシュ体を通すことにより粉体を分散させて、規定された範囲(幅および長さ)に粉体を均等に供給する構成としている。
しかしながら、従来の粉体供給装置を用いた場合には、粉体の供給状況がばらついて、合材層を均等な厚みで形成することができないため、従来の粉体供給装置を二次電池用の電極体を製造するために使用することは困難であった。
これにより、二次電池の製造工程の短縮および二次電池の製造コストの低減を実現できる。
ここで説明をする本発明の第一の実施形態に係る粉体供給装置1は、粉体10の供給系統の数(すなわち、粉体の排出口の数)を1系統のみとするものである。
なお、本説明では、図1および図2に示す矢印Aの方向を鉛直上向き、矢印Bの方向を鉛直下向きと規定している。そして、粉体供給装置1は、上方から下方に向けて、粉体を供給する構成としている。
なお、本発明の第一の実施形態に係る粉体供給装置1では、図2に示すように、粉体10の供給対象たる被供給材5は、所定の送り方向αに、一定の速度で移動している。
本実施形態に示す粉体供給装置1では、粉体量検出センサ4として超音波センサを採用している。粉体量検出センサ4としては、超音波センサまたは赤外線センサ等の、非接触で粉体10の天端レベルを検出することができるものを使用するのが好適である。
そして、定量供給部2は、ケース6の鉛直下方において所定の送り方向αに向けて移動している被供給材5に対して、ケース6から排出される粉体10を落下させて、粉体10を供給するように構成されている。
なお、粉体10の「落下」の態様としては、自重により自然落下する態様、または回転子7に押圧されて付勢されつつ落下する態様がある。
そして、ケース6では、貯溜部6aの上端部において、粉体10を導入するための開口部たる導入口6bが形成されるとともに、貯溜部6aの下端部において、粉体10を排出するための開口部たる排出口6cが形成されている。
排出口6cの下端面は水平に形成されており、排出口6cから排出される粉体10の量が、排出口6cの各部で均等になるように構成されている。
そして、排出口6cは、その長さ方向が被供給材5の送り方向αに対して平行、かつ、平面視においてその幅方向が被供給材5の送り方向αに対して直交する方向となるように形成されている。
すなわち、粉体供給装置1は、定量供給部2から被供給材5に向けて供給された粉体10が、被供給材5の供給面に付着した状態で、その供給面における単位面積当たりの粉体10の重量が一定となるように構成されている。
本実施形態における回転子7は、略円柱状のローラ部材である。回転子7は、軸部7cが、排出口6cの幅方向に対して平行、かつ、平面視において、被供給材5の送り方向αに対して直交するように配置され、軸部7c回りに回転可能な態様で水平に支持されている。
すなわち、回転子7の外周部には、外周面7aおよび溝部7bにより、周方向に等間隔で複数の凹凸部が形成されている。
このような構成により、定量供給部2は、ケース6の貯溜部6aと回転子7との隙間に沿って、粉体10を移送するときに、粉体10の流れに偏りが生じることを抑制する。
このような構成により、定量供給部2は、貯溜部6aと回転子7との隙間に沿って、排出口6cまで移送されてきた粉体10を該排出口6cにおいて分散する際に、粉体10の流れに偏りが生じることを抑制する。
排出口6cから落下する粉体10を、メッシュ体8を通過させることによって、移送途中に塊状となりうる粉体10を確実に分散させて、粉体10の分布および密度を均等化させることができる。したがって、より確実に、被供給材5の表面に付着した粉体10の重量を均等化させることができる。
放電電極11は、メッシュ体8に対してコロナ放電をすることができるものであり、排出口6cの幅Wに対応する範囲に配置されている。
そして、放電電極11がメッシュ体8に対して、連続的にあるいは定期的に放電することによって、メッシュ体8に目詰まりした粉体10を除去することができる。これにより、粉体供給装置1によって供給される粉体10の量が変動することを防止できるとともに、メッシュ体8を介して供給される粉体10の分布に偏りが生じることを防止できる。
このような構成により、メッシュ体8の目詰まりによって、被供給材5に供給される粉体10の分布に偏りが生じることが防止できる。
このように、各溝部7bを円弧状の形状とすることにより、溝部7b・7b・・・に入り込んだ粉体10が、貯溜部6aと溝部7b・7b・・・との間で圧縮されても、溝部7b・7b・・・に付着することなく、粉体10を溝部7b・7b・・・から容易に離脱させることができる。
仮に、溝部7bの内部に粉体10が付着するようなことがあると、回転子7の回転に従って排出口6cに落とし込まれる粉体10の量にばらつきが生じることになるため、溝部7bのように曲面のみで構成される形状(円弧状等)を採用するのが好適である。
仮に、溝部7bを回転子7の軸心方向に対して傾斜させて形成すると、回転子7の回転に従って、溝部7bに入り込んだ粉体10に、軸心方向に向けて作用する応力を付与することになるため、排出口6cの幅方向における粉体10の分布に偏りが生じて、排出口6cから均等に粉体10を排出することが困難となる。
フレーム12は、上下方向に貫通する開口部を有する略矩形状の枠部材であり、下面の開口を全面的に覆うメッシュ体13が取り付けられている。
このような構成により、振動発生器14を作動させて、フレーム12およびメッシュ体13を振動させながらフレーム12内に粉体10を供給することで、その供給した粉体10をメッシュ体13でふるいにかけながら、粉体補給部3の下方に配置した定量供給部2に対して、粉体10を供給することができる。
例えば、図1および図2に示すように、回転子7の上に堆積している粉体10の堆積高さ(天端の位置)が、下限レベルLLまで下降したことを粉体量検出センサ4により検出したとき、図示しない制御装置により所定の時間だけ振動発生器14を作動させて、粉体補給部3によって定量供給部2に対して所定量の粉体10を補給する。
そして、粉体量検出センサ4により、粉体10の天端レベルが所定の上限レベルHLに達したことを確認できたときに、図示しない制御装置により、ならし機構9を停止させるようにしている。
これにより、回転子7の回転に従って、排出口6cから定量の粉体10を排出することができる。
図6(a)に示す如く、回転子の別実施形態である回転子17は、回転軸17cと、回転軸17cの長さ方向における両端部に固定される一対のプレート17b・17bと、一対のプレート17b・17bに固定され、回転軸17c回りに放射状に配置された複数(本実施形態では、72枚)の羽根部材17a・17a・・・とを有する。
すなわち、回転子17の外周部においては、複数の凸部が羽根部材17a・17a・・・によって等間隔で形成されている。
例えば、図6(b)に示すように、略長円状の軌道上を周回する無端ベルト状の回転子18に粉体10を掻きとるための板部材18a・18a・・・を付設する構成としてもよい。
すなわち、二つの定量供給部2・2を上下に積み重ねるように配置して、上側の定量供給部2から下側の定量供給部2に対して定量の粉体10を補給する構成とすることが可能である。斯かる場合、下側の定量供給部2に対する粉体10の補給量を精度よく制御することにより、被供給材5に対する粉体10の供給量をより精度よく一定にできるという効果が期待できる。
ここで説明をする本発明の第二の実施形態に係る粉体供給装置21は、粉体10の供給系統の数を複数(本実施形態では3系統)とするものであり、被供給材5に供給する粉体10の層を多層化して、被供給材5に付着させる粉体10の厚みを確保しつつ、よりムラなく粉体10を付着させることを可能にするものである。
なお、本発明の第二の実施形態に係る粉体供給装置21では、第一の実施形態に係る粉体供給装置1と同様に、所定の送り方向αに、一定の速度で移動する被供給材5を粉体10の供給対象としている。
図8(a)に示すように、粉体供給装置21に備えられる回転子7の外周面7aには、周方向に向けて、72個の各溝部7b・7b・・・が等間隔に形成されている。
すなわち、回転子7において、溝部7b・7b・・・は、5度ずつ角度をずらして形成されている。
このため、粉体供給装置21では、この5度の範囲内で、回転子7の位相(回転位置)が同一にならないように、3つの回転子7・7・7の位相が5/3度ずつずれている(図8(b)参照)。
すなわち、回転子7に形成される溝部7bの個数、および粉体供給装置21における定量供給部2の個数に応じて、回転子7の位相差を決定することができる。
また、本実施形態では、回転子7X・7Y・7Zの位相差を均等(5/3度)にした場合を例示したが、必ずしも回転子7X・7Y・7Zの位相差を均等にする必要はなく、回転子7X・7Y・7Zに対応する排出口6c・6c・6cの直下を同一点Pが通過するときの、回転子7X・7Y・7Zの位相が異なっていればよい。
ここで説明する本発明の一実施形態に係る電極体製造装置31は、前述した本発明の第二の実施形態に係る粉体供給装置21を備えるものであり、粉体供給装置21を利用して、乾式の手法によって、二次電池を構成する電極体40(正極あるいは負極)を製造する。
本発明の一実施形態に係る電極体製造装置31において用いる被供給材5は、電極箔であり、粉体供給装置21によって、被供給材5の表面に定量の粉体10が供給される。
電極体製造装置31においては、制御装置33が、算出した合材層41の厚みに基づいて、回転子7・7・7の回転速度および振動発生器14等の動作を制御し、合材層41の厚みを所定の規格値内に収めるように調整する。
このような電極体製造装置31を用いれば、電極用ペーストを製造するための種々の工程(混練、脱泡等)、および従来必要であったペーストの乾燥工程等も省略することができるため、乾式の手法で、効率よく電極体を製造することが可能になる。
このような構成により、乾式の手法によって、効率よく電極体40を製造することができる。
またこれにより、二次電池の製造工程の短縮および二次電池の製造コストの低減を実現できる。
2 定量供給部
3 粉体補給部
4 粉体量検出センサ
5 被供給材
6 ケース
6a 貯溜部
6c 排出口
7 回転子
7b 溝部
8 メッシュ体
9 ならし機構
10 粉体
21 粉体供給装置(第二の実施形態)
31 電極体製造装置
32 粉体圧縮機構
Claims (6)
- 供給対象物たる粉体を貯溜するための空隙たる貯溜部と、該貯溜部と連通する矩形状の開口部と、を有するケースを備え、前記開口部は、前記ケースの下端部に設けられ、
前記開口部から前記粉体を排出して、前記開口部の鉛直下方において水平に変位する、前記粉体の被供給対象物たる被供給材に対して、前記粉体を、前記開口部から落下させつつ供給する粉体供給装置であって、
前記粉体を前記開口部に落とし込むための回転子と、前記開口部の下端を覆い、前記開口部に落とし込まれた前記粉体を通過させるためのメッシュ体と、を備え、
前記回転子の外周部には、該回転子の軸心方向に平行に、かつ、周方向において等間隔に複数の凹凸部、または複数の凸部が形成され、
前記回転子は、該回転子の軸心が、平面視において前記開口部の幅方向に対して平行、かつ、水平となるように、前記貯溜部において回転可能に支持され、
前記回転子の外周部と前記貯溜部の内面との間には、それらの距離が一定となるように、前記粉体の移送経路となる隙間が形成され、
前記メッシュ体は、前記回転子の外周部と一定の距離をあけて配置されている、
ことを特徴とする二次電池用粉体供給装置。 - 前記貯溜部に供給され前記回転子の上部に堆積した前記粉体の上面を略水平にならすためのならし機構をさらに備える、
ことを特徴とする請求項1に記載の二次電池用粉体供給装置。 - 前記回転子は、略円柱状のローラ部材であり、
前記複数の凹凸部は、前記回転子の外周面と、前記外周面に形成される複数の溝部と、により構成され、
前記複数の溝部は、前記ローラ部材の軸心方向に平行に、かつ、周方向において等間隔に配置される、
ことを特徴とする請求項1または請求項2に記載の二次電池用粉体供給装置。 - 前記溝部は、前記回転子の軸心方向に直交する断面において、円弧状に形成される、
ことを特徴とする請求項3に記載の二次電池用粉体供給装置。 - 前記メッシュ体に対してコロナ放電するための放電電極をさらに備え、
前記放電電極は、前記メッシュ体の下方に配置される、
ことを特徴とする請求項1から請求項4のいずれか一項に記載の二次電池用粉体供給装置。 - 請求項1から請求項5のいずれか一項に記載の前記二次電池用粉体供給装置を備える電極体の製造装置であって、
前記粉体は、二次電池を構成する電極体を形成するための活物質を含み、
前記被供給材は、二次電池を構成する電極体を形成するための電極箔であり、
前記被供給材の表面に供給された前記粉体を、前記被供給材の厚み方向に圧縮するための粉体圧縮手段を備える、
ことを特徴とする電極体の製造装置。
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- 2013-09-24 EP EP13842196.1A patent/EP2903058B1/en active Active
- 2013-09-24 US US14/429,003 patent/US9825279B2/en active Active
- 2013-09-24 HU HUE13842196A patent/HUE045828T2/hu unknown
- 2013-09-24 CN CN201380049413.2A patent/CN104718645B/zh active Active
- 2013-09-24 WO PCT/JP2013/075777 patent/WO2014050835A1/ja active Application Filing
- 2013-09-24 KR KR1020157009937A patent/KR101691758B1/ko active IP Right Grant
- 2013-09-24 PL PL13842196T patent/PL2903058T3/pl unknown
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Also Published As
Publication number | Publication date |
---|---|
JP6009886B2 (ja) | 2016-10-19 |
US20150255778A1 (en) | 2015-09-10 |
JP2014067530A (ja) | 2014-04-17 |
KR101691758B1 (ko) | 2016-12-30 |
EP2903058B1 (en) | 2019-07-03 |
CN104718645A (zh) | 2015-06-17 |
PL2903058T3 (pl) | 2019-10-31 |
KR20150060786A (ko) | 2015-06-03 |
HUE045828T2 (hu) | 2020-01-28 |
US9825279B2 (en) | 2017-11-21 |
EP2903058A4 (en) | 2015-10-21 |
CN104718645B (zh) | 2017-11-17 |
EP2903058A1 (en) | 2015-08-05 |
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