WO2018110001A1 - Electrode body production method - Google Patents

Electrode body production method Download PDF

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Publication number
WO2018110001A1
WO2018110001A1 PCT/JP2017/032345 JP2017032345W WO2018110001A1 WO 2018110001 A1 WO2018110001 A1 WO 2018110001A1 JP 2017032345 W JP2017032345 W JP 2017032345W WO 2018110001 A1 WO2018110001 A1 WO 2018110001A1
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Prior art keywords
separator
positive electrode
bonded
negative electrode
electrode
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PCT/JP2017/032345
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French (fr)
Japanese (ja)
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上川英康
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株式会社村田製作所
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Publication of WO2018110001A1 publication Critical patent/WO2018110001A1/en

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a method for manufacturing an electrode body of a battery.
  • an electrode body of a battery an electrode body having a structure in which a plurality of positive electrodes and negative electrodes are alternately stacked with a separator interposed therebetween is known.
  • Patent Document 1 discloses a method in which a long separator material, a long positive electrode material, a long separator material, and a long negative electrode material are laminated in this order, and then predetermined.
  • the method of manufacturing an electrode body is described by cut
  • the present invention solves the above-described problem, and is an electrode body that can suppress the occurrence of positional deviation between the time when the separator material on which the electrode is placed is cut and before the separator material is conveyed to the pickup position.
  • An object is to provide a manufacturing method.
  • the method for producing the electrode body of the present invention comprises: A method for producing an electrode body comprising a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, Adhering the positive electrode to the long first separator material; In the first working position, in a form surrounding the region to be a first separator for one element to which the positive electrode is bonded, while leaving an uncut portion in part based on the position of the positive electrode, Cutting the separator material, and The first separator material into which the first separator material is cut so that the region serving as the first separator for one element to which the positive electrode is bonded is located at a second work position different from the first work position.
  • a conveying step In the second working position, the region to be the first separator for one element to which the positive electrode is bonded is picked up, the uncut portion is cut, and the positive electrode is bonded from the first separator material. Separating the first separator for one element; A step of transporting the separated first separator for one element to which the positive electrode is bonded to a lamination stage; Adhering the negative electrode to the long second separator material; In a third working position, in a mode of surrounding the region serving as a second separator for one element to which the negative electrode is adhered, leaving an uncut portion in part based on the position of the negative electrode, Cutting the separator material, and The second separator material into which the second separator material is cut so that the region serving as the second separator for one element to which the negative electrode is bonded is located at a fourth work position different from the third work position.
  • a conveying step In the fourth work position, the region to be the second separator for one element to which the negative electrode is bonded is picked up, the uncut portion is cut, and the negative electrode is bonded from the second separator material. Separating the second separator for one element; Transporting the separated second separator for one element to which the negative electrode is bonded to the stacking stage; Laminating the first separator for one element to which the positive electrode is bonded and the second separator for one element to which the negative electrode is bonded in the stacking stage; It is characterized by having.
  • the notch of the first separator material does not cause a position shift of the region serving as the first separator for one element to which the positive electrode is bonded when the first separator material having the notch is conveyed, And when the area to be the first separator for one element to which the positive electrode is bonded is picked up, the uncut portion is cut in a mode,
  • the notch of the second separator material does not cause a positional shift of the region serving as the second separator for one element to which the negative electrode is bonded when the second separator material with the notch is conveyed. And when the area
  • the shape of the positive electrode and the shape of the negative electrode may be non-rectangular shapes.
  • the first separator material in the first working position, the first separator material is cut and conveyed to the second working position while leaving an uncut portion in part, and in the second working position, the positive electrode is Since the region that becomes the first separator for one element that has been bonded is picked up and the uncut portion is cut, the occurrence of misalignment when the region that becomes the first separator for one element to which the positive electrode is bonded is conveyed Can be suppressed.
  • the second separator material is cut while leaving an uncut portion in part, and conveyed to the fourth work position, and the negative electrode is adhered to the fourth work position.
  • the region to be the second separator for the element Since the region to be the second separator for the element is picked up and the uncut portion is cut, the occurrence of misalignment when the region to be the second separator for one element to which the negative electrode is bonded is conveyed is suppressed. be able to. Thereby, the electrode body which suppressed the position shift between a positive electrode and a negative electrode can be manufactured.
  • FIG. 1 It is sectional drawing which shows the structure of an electrode body. It is a side view for demonstrating each process in the manufacturing method of the electrode body in 1st Embodiment. It is a top view for demonstrating the method of making a notch in a 1st separator material. It is a figure for demonstrating the method to adhere
  • the structure of the electrode body will be briefly described, and then the method for manufacturing the electrode body will be described.
  • the electrode body 10 has a structure in which a plurality of first separators 11, positive electrodes 12, second separators 13, and negative electrodes 14 are sequentially laminated, and is used for a battery such as a lithium ion battery. .
  • the positive electrode 12 includes a positive electrode current collector made of a metal foil such as aluminum, and a positive electrode active material formed on both surfaces of the positive electrode current collector.
  • the positive electrode located on the outermost side may be configured such that the positive electrode active material is formed only on one surface of the positive electrode current collector.
  • the negative electrode 14 includes a negative electrode current collector made of a metal foil such as copper, and a negative electrode active material formed on both surfaces of the negative electrode current collector.
  • the negative electrode located on the outermost side may be configured such that the negative electrode active material is formed only on one surface of the negative electrode current collector.
  • first separator 11 and the second separator 13 those made of the same material can be used, and for example, the first separator 11 and the second separator 13 can be constituted by a microporous thin film made of polypropylene having excellent insulating properties.
  • FIG. 2 is a side view for explaining each step in the method of manufacturing the electrode body 10 in the first embodiment.
  • symbol of 11A is attached
  • symbol 11 is attached
  • the long first separator material 11 ⁇ / b> A is wound in a roll shape at the separator unwinding portion 21, unwound from the separator unwinding portion 21, and sent out in one direction.
  • the first separator material 11A is transported in one direction by stacking the long first separator material 11A on the long PET film and transporting the long PET film in one direction. To do.
  • the positive electrode 12 is placed on the long first separator material 11A, and the positive electrode 12 is bonded to the first separator material 11A.
  • the positive electrode 12 prepared in advance is placed at a predetermined distance H from one end S in the width direction of the long first separator material 11A.
  • one end S in the width direction of the first separator material 11A is the end on the side from which the positive electrode tab 12A protrudes when the positive electrode 12 is bonded, as shown in FIG.
  • the positive electrode 12 is attached to the first positive electrode 12 by the thermocompression bonding method in which the heater 12 is sandwiched between the upper part and the lower part of the positive electrode 12 placed on the first separator material 11A and heated and pressurized. Adhere to the separator material 11A.
  • the positive electrode tab 12A protrudes outside the one end S of the first separator material 11A.
  • the method of adhering the positive electrode 12 to the first separator material 11A is not limited to thermocompression bonding, and may be adhered by a method other than thermocompression bonding.
  • the cutting mechanism unit 23 cuts the first separator material 11A while leaving an uncut portion in part based on the position of the positive electrode 12.
  • the cutting mechanism unit 23 includes a camera (not shown), images the first separator material 11A including the positive electrode 12 by the camera, and based on the captured image, according to the position of the positive electrode 12, A cut 31 is made in the first separator material 11A by the cutting blade 23a.
  • a cut 31 is made in the first separator material 11A at positions along the outer periphery of the positive electrode 12 other than the side where the positive electrode tab 12A is provided. .
  • the cuts 31 are made so that the uncut portion 35 that is not cut is left so that the entire periphery of the positive electrode 12 is not cut off. That is, the cut 31 is a cut portion with respect to the uncut portion 35 described above.
  • FIG. 3 shows an example in which three uncut portions 35 are formed.
  • the notch 31 does not cause a positional shift between the region surrounded by the notch 31 and the other region when the first separator material 11A into which the notch 31 is put is conveyed in a later step. And when picking up the area
  • the cutting blade 23a with which the cutting mechanism part 23 is provided has a shape corresponding to the cut 31 which is a cutting part of FIG.
  • the uncut part 35 may be less than three places, and may be four or more places. It is preferable that the number of uncut portions 35 is small so that the uncut portion 35 can be easily cut when the uncut portion 35 is separated or separated in a later step, and the uncut portion along the length direction of the notch 31 is preferable.
  • the length of 35 is preferably shorter. However, when the number of uncut portions 35 is reduced and when the length of the uncut portions 35 is shortened, the first separator 11 is later transferred during the transport of the first separator material 11A into which the cuts 31 are made. There is a possibility that a position shift occurs in the region. For this reason, the number and length of the uncut portions 35 are appropriately set in consideration of easiness of cutting and prevention of misalignment when the first separator material 11A including the cuts 31 is conveyed. There is a need.
  • the shape of the positive electrode 12 is not limited to the shape shown in FIG.
  • the shape of the positive electrode 12 may be a non-rectangular shape or a rectangular shape.
  • the first separator material 11A is conveyed in the direction of arrow Y1 in FIG. That is, the portion of the first separator material 11A where the notch 31 is made at the first work position T1, that is, the region that becomes the first separator 11 for one element to which the positive electrode 12 is bonded is the first work. It is transported to a second work position T2 different from the position T1.
  • the positive electrode transport head 24 picks up an area to be the first separator 11 for one element to which the positive electrode 12 is adhered, and cuts the uncut portion 35. That is, the positive electrode transport head 24 adsorbs a region to be the first separator 11 for one element to which the positive electrode 12 is adhered, and the positive electrode transport head 24 is lifted to cut the uncut portion 35. Then, the first separator 11 for one element to which the positive electrode 12 is bonded is separated from the first separator material 11A. Thereby, the 1st separator 11 which the positive electrode 12 adhere
  • the first separator 11 picked up by the positive electrode conveying head 24 is conveyed to the lamination stage 25, the positive electrode 12 is recognized by a camera (not shown), the position and orientation are corrected, and the lamination is performed. Place on stage 25.
  • the first separator 11 and the positive electrode 12 placed on the stacking stage 25 are necessary until the second separator 13 for one element, to which the negative electrode 14 is bonded, is stacked on the first separator 11 and the positive electrode 12 in the next step. Accordingly, the laminated claw 27 is pressed from above.
  • the first separator material 11A in a state where the first separator 11 for one element to which the positive electrode 12 is bonded is picked up and separated by the positive electrode transport head 24 at the second work position T2. Show.
  • the first separator material 11A is cut while leaving the uncut portion 35 in a part based on the position of the positive electrode 12 at the first work position T1.
  • 31 is inserted, and the first separator material 11A into which the cut 31 has been made is conveyed from the first work position T1 to the second work position T2.
  • a region to be the first separator 11 for one element to which the positive electrode 12 is bonded is picked up, and the uncut portion 35 is cut by raising the positive electrode transport head 24,
  • the first separator 11 for one element is separated from the first separator material 11A. Thereafter, the separated first separator 11 for one element is conveyed to the stacking stage 25.
  • warping may occur.
  • the positive electrode in which the warp has occurred is suppressed in the state of being bonded to the first separator material 11A, but when the first separator material 11A is cut, the positive electrode 12 does not leave an uncut portion.
  • the warpage that has been suppressed is returned, and a positional shift is likely to occur when transporting from the first work position T1 to the second work position T2.
  • the uncut portion 35 is left so that the region that becomes the first separator 11 after cutting is not yet formed. Since it is connected to the first separator material 11 ⁇ / b> A via the cut portion 35, it is possible to suppress the occurrence of misalignment.
  • the notch 31 of the first separator material 11 ⁇ / b> A has a positional deviation of the region that becomes the first separator 11 for one element to which the positive electrode 12 is bonded when the first separator material 11 ⁇ / b> A with the notch is conveyed. This is performed in such a manner that the uncut portion 35 is cut when picking up the region that does not occur and becomes the first separator 11 for one element to which the positive electrode 12 is bonded. It is possible to effectively suppress the occurrence of positional deviation in the region that becomes the separator 11.
  • the shape of the positive electrode 12 in the present embodiment is a non-rectangular shape, but even in this case, the occurrence of misalignment of the region that becomes the first separator 11 after cutting is suppressed. Can do.
  • a step of making a cut 31 in the first separator material 11A, and a step of picking up a region to be the first separator 11 for one element to which the positive electrode 12 is bonded and separating it from the first separator material 11A Since it is performed at a different position, the efficiency of the manufacturing process can be improved.
  • the step of making the cut 31 in the first separator material 11A and the step of picking up the first separator 11 for one element to which the positive electrode 12 is bonded and separating it from the first separator material 11A are performed at the same position.
  • the cutting mechanism unit 23 and the positive electrode transport head 24 work at the same position, and work efficiency is reduced.
  • the cutting mechanism unit 23 performs the cutting operation at the first work position T1, and the positive electrode transport head 24 cuts the uncut portion 35 at the second work position T2. Since the pickup work of the first separator 11 for one element is performed, the work efficiency can be improved.
  • the first separator 11 to which the positive electrode 12 is bonded is picked up by the positive electrode transport head 24, the first separator material 11A is collected.
  • the negative electrode 14 is placed on a long second separator material (not shown), and the negative electrode 14 is bonded to the second separator material.
  • the negative electrode 14 is bonded to a position on the second separator material at a predetermined distance from one end in the width direction.
  • the one end in the width direction of the second separator material is the end on the side from which the negative electrode tab protrudes when the negative electrode 14 is bonded.
  • the second separator material is cut based on the position of the negative electrode 14 while leaving an uncut portion in part.
  • the method of cutting the second separator material is the same as the method of cutting the first separator material.
  • the second separator material is also conveyed in one direction.
  • the portion of the second separator material that is cut at the third work position, that is, the region that becomes the second separator 13 for one element to which the negative electrode 14 is bonded is different from the third work position. It is conveyed to the work position.
  • the negative electrode transport head 26 picks up an area to be the second separator 13 for one element to which the negative electrode 14 is bonded, and cuts the uncut portion. That is, the negative electrode transport head 26 adsorbs a region to be the second separator 13 for one element to which the negative electrode 14 is adhered, and lifts the negative electrode transport head 26 to cut an uncut portion.
  • the second separator 13 for one element to which the negative electrode 14 is bonded is separated from the second separator material. Thereby, the 2nd separator 13 which the negative electrode 14 adhere
  • the second separator 13 picked up by the negative electrode transport head 26 is transported to the stacking stage 25, and the second separator 13 is aligned with the position between the positive electrode 12 and the negative electrode 14. Is laminated on the first separator 11, more specifically, on the positive electrode 12 adhered on the first separator 11.
  • the alignment between the positive electrode 12 and the negative electrode 14 is performed, for example, by detecting the position of the positive electrode 12 on the stacking stage 25 and aligning the detected position of the positive electrode 12 with the position of the negative electrode 14 after stacking.
  • the laminated second separator 13 and negative electrode 14 are pressed from above by the laminating claws 27 as needed until the first separator 11 to which the positive electrode 12 is bonded is laminated on the next step.
  • the second separator material is cut based on the position of the negative electrode 14, the cut is made while leaving the uncut portion, so that the second separator material with the cut is used as the third separator material.
  • the cut is made while leaving the uncut portion, so that the second separator material with the cut is used as the third separator material.
  • the notch of the second separator material does not cause a position shift of the region to be the second separator 13 for one element to which the negative electrode 14 is adhered when the second separator material with the notch is conveyed.
  • the uncut portion is cut when picking up the region to be the second separator 13 for one element to which the negative electrode 14 is bonded, the second separator 13 for one element after cutting It is possible to effectively suppress the occurrence of positional deviation in the region.
  • the step of cutting the second separator material and the step of picking up the region to be the second separator 13 for one element to which the negative electrode 14 is bonded and separating it from the second separator material are performed at different positions. Therefore, the efficiency of the manufacturing process can be improved.
  • the first separator material 11A with the cuts is cut when transported from the first work position T1 to the second work position T2.
  • the occurrence of displacement of the first separator 11 for one element to which the positive electrode 12 is bonded can be suppressed.
  • the second separator material into which the cut has been made is transported from the third work position to the fourth work position, the second separator 13 corresponding to one element to which the negative electrode 14 is bonded is obtained by cutting. The occurrence of misalignment can be suppressed.
  • the alignment between the positive electrode 12 and the negative electrode 14 is performed. Since it performs, the position shift between the positive electrode 12 and the negative electrode 14 of the electrode body 10 manufactured can be suppressed more effectively.
  • the first separator 11 to which the positive electrode 12 is bonded is transferred to the stacking stage 25 by the positive electrode transfer head 24, and the first separator 11 is aligned while the position between the positive electrode 12 and the negative electrode 14 is adjusted.
  • the separator 11 is laminated on the second separator 13, more specifically, on the negative electrode 14 bonded on the second separator 13.
  • the laminated first separator 11 and the positive electrode 12 are pressed from above by the laminating claws 27 until the second separator 13 to which the negative electrode 14 is bonded is laminated on the first separator 11 and the positive electrode 12 as necessary.
  • the stacking of the second separator 13 to which the negative electrode 14 is bonded and the first separator 11 to which the positive electrode 12 is bonded is repeatedly performed until the number of stacked layers of the positive electrode 12 and the negative electrode 14 reaches a predetermined number.
  • first separator 11, the positive electrode 12, the second separator 13, and the negative electrode 14 that are stacked in plurality are bonded together.
  • first separator 11, the positive electrode 12, the second separator 13, and the negative electrode 14 are bonded together.
  • thermocompression bonding head 40 containing a heater from above the laminated body in which the first separator 11, the positive electrode 12, the second separator 13, and the negative electrode 14 are laminated.
  • the entire first separator 11, positive electrode 12, second separator 13 and negative electrode 14 are thermocompression bonded.
  • the heater may be incorporated not only in the thermocompression bonding head 40 but also in the lamination stage 25, or may be incorporated only in the lamination stage 25 without being incorporated in the thermocompression bonding head 40.
  • the electrode body 10 is manufactured by the above process.
  • the first separator 11, the positive electrode 12, the second separator 13, and the negative electrode 14 constituting the electrode body 10 are all laminated and then bonded together.
  • the laminated first separator 11, positive electrode 12, second separator 13, and negative electrode 14 may be bonded together.
  • thermocompression bonding head 40 can be omitted.
  • the manufactured electrode body 10 may have any structure as long as it includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode.
  • all the positive electrodes stacked may not have the same shape, and all the negative electrodes stacked may not have the same shape.
  • the positive electrode and the negative electrode positioned in the lower layer in the stacking direction may be smaller in size than the positive electrode and the negative electrode positioned in the upper layer and may have a step in the stacking direction.

Abstract

The invention suppresses the occurrence of a positional shift until a separator material carrying an electrode, after having been cut, has been conveyed to a pickup position. This electrode body production method comprises: a step of adhering a positive electrode 12 onto a long first separator material 11A; a step of making incisions in a first separator material, while leaving an uncut section, that surround a region whereon the positive electrode 12 has been adhered that is to be the first separator 11 for one element; a step of conveying the first separator material 11A in such a manner as to position, at a second work position T2, the region that is to be the first separator 11 whereon the positive electrode 12 has been adhered; a step of picking up, at the second work position T2, the region that is to be the first separator 11, cutting the uncut section, and separating the first separator 11 whereon the positive electrode 12 has been adhered; and a step of conveying to a layering stage 25 the first separator 11 whereon the positive electrode 12 has been adhered. These steps are also performed on a second separator material and a negative electrode 14.

Description

電極体の製造方法Method for manufacturing electrode body
　本発明は、電池の電極体の製造方法に関する。 The present invention relates to a method for manufacturing an electrode body of a battery.
　電池の電極体として、セパレータを間に介在させて、正極と負極を交互に複数積層した構造を有する電極体が知られている。 As an electrode body of a battery, an electrode body having a structure in which a plurality of positive electrodes and negative electrodes are alternately stacked with a separator interposed therebetween is known.
　そのような電極体の製造方法として、特許文献１には、長尺状のセパレータ材、長尺状の正極材、長尺状のセパレータ材および長尺状の負極材を順に積層した後、所定の形状となるように切断し、切断して得られる単位構造体を複数積層することによって、電極体を製造する方法が記載されている。 As a method for manufacturing such an electrode body, Patent Document 1 discloses a method in which a long separator material, a long positive electrode material, a long separator material, and a long negative electrode material are laminated in this order, and then predetermined. The method of manufacturing an electrode body is described by cut | disconnecting so that it may become the shape of this, and laminating | stacking multiple unit structures obtained by cut | disconnecting.
特表２０１５－５２８６２９号公報Special table 2015-528629
　しかしながら、特許文献１に記載の電極体の製造方法では、単位構造体を得るために、順に積層された長尺状のセパレータ材、長尺状の正極材、長尺状のセパレータ材および長尺状の負極材を切断する工程と、切断した単位構造体を積層位置に搬送するためにピックアップする工程とを別の位置で行っているので、切断した単位構造体を、ピックアップする位置に搬送するまでの間に位置ずれが生じる場合がある。単位構造体に位置ずれが生じると、単位構造体の積層時にも位置ずれが生じてしまう。 However, in the method of manufacturing an electrode body described in Patent Document 1, in order to obtain a unit structure, a long separator material, a long positive electrode material, a long separator material, and a long laminate that are sequentially stacked. Since the step of cutting the negative electrode material and the step of picking up the cut unit structure to transport to the stacking position are performed at different positions, the cut unit structure is transported to the position to be picked up There may be a positional shift between When the unit structure is displaced, the displacement is also caused when the unit structures are stacked.
　本発明は、上記課題を解決するものであり、電極を載置したセパレータ材を切断した後、ピックアップする位置に搬送するまでの間に、位置ずれが生じることを抑制することができる電極体の製造方法を提供することを目的とする。 The present invention solves the above-described problem, and is an electrode body that can suppress the occurrence of positional deviation between the time when the separator material on which the electrode is placed is cut and before the separator material is conveyed to the pickup position. An object is to provide a manufacturing method.
　本発明の電極体の製造方法は、
　正極と、負極と、前記正極および前記負極の間に配置されるセパレータとを備える電極体の製造方法であって、
　長尺状の第１のセパレータ材に前記正極を接着する工程と、
　第１の作業位置において、前記正極の位置に基づいて、一部に未切断部分を残しつつ、前記正極が接着した１素子分の第１のセパレータとなる領域を囲む態様で、前記第１のセパレータ材に切り込みを入れる工程と、
　前記正極が接着した１素子分の前記第１のセパレータとなる領域が、前記第１の作業位置とは異なる第２の作業位置に位置するように、切り込みを入れた前記第１のセパレータ材を搬送する工程と、
　前記第２の作業位置において、前記正極が接着した１素子分の前記第１のセパレータとなる領域をピックアップして前記未切断部分を切断し、前記第１のセパレータ材から、前記正極が接着した１素子分の前記第１のセパレータを分離する工程と、
　分離した、前記正極が接着した１素子分の前記第１のセパレータを積層ステージに搬送する工程と、
　長尺状の第２のセパレータ材に前記負極を接着する工程と、
　第３の作業位置において、前記負極の位置に基づいて、一部に未切断部分を残しつつ、前記負極が接着した１素子分の第２のセパレータとなる領域を囲む態様で、前記第２のセパレータ材に切り込みを入れる工程と、
　前記負極が接着した１素子分の前記第２のセパレータとなる領域が、前記第３の作業位置とは異なる第４の作業位置に位置するように、切り込みを入れた前記第２のセパレータ材を搬送する工程と、
　前記第４の作業位置において、前記負極が接着した１素子分の前記第２のセパレータとなる領域をピックアップして前記未切断部分を切断し、前記第２のセパレータ材から、前記負極が接着した１素子分の前記第２のセパレータを分離する工程と、
　分離した、前記負極が接着した１素子分の前記第２のセパレータを前記積層ステージに搬送する工程と、
　前記積層ステージで、前記正極が接着した１素子分の前記第１のセパレータと、前記負極が接着した１素子分の前記第２のセパレータを積層する工程と、
を有することを特徴とする。 The method for producing the electrode body of the present invention comprises:
A method for producing an electrode body comprising a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode,
Adhering the positive electrode to the long first separator material;
In the first working position, in a form surrounding the region to be a first separator for one element to which the positive electrode is bonded, while leaving an uncut portion in part based on the position of the positive electrode, Cutting the separator material, and
The first separator material into which the first separator material is cut so that the region serving as the first separator for one element to which the positive electrode is bonded is located at a second work position different from the first work position. A conveying step;
In the second working position, the region to be the first separator for one element to which the positive electrode is bonded is picked up, the uncut portion is cut, and the positive electrode is bonded from the first separator material. Separating the first separator for one element;
A step of transporting the separated first separator for one element to which the positive electrode is bonded to a lamination stage;
Adhering the negative electrode to the long second separator material;
In a third working position, in a mode of surrounding the region serving as a second separator for one element to which the negative electrode is adhered, leaving an uncut portion in part based on the position of the negative electrode, Cutting the separator material, and
The second separator material into which the second separator material is cut so that the region serving as the second separator for one element to which the negative electrode is bonded is located at a fourth work position different from the third work position. A conveying step;
In the fourth work position, the region to be the second separator for one element to which the negative electrode is bonded is picked up, the uncut portion is cut, and the negative electrode is bonded from the second separator material. Separating the second separator for one element;
Transporting the separated second separator for one element to which the negative electrode is bonded to the stacking stage;
Laminating the first separator for one element to which the positive electrode is bonded and the second separator for one element to which the negative electrode is bonded in the stacking stage;
It is characterized by having.
　前記第１のセパレータ材の切り込みは、切り込みを入れた前記第１のセパレータ材を搬送する際に、前記正極が接着した１素子分の前記第１のセパレータとなる領域の位置ずれが生じず、かつ、前記正極が接着した１素子分の前記第１のセパレータとなる領域をピックアップする際に前記未切断部分が切断されるような態様で行い、
　前記第２のセパレータ材の切り込みは、切り込みを入れた前記第２のセパレータ材を搬送する際に、前記負極が接着した１素子分の前記第２のセパレータとなる領域の位置ずれが生じず、かつ、前記負極が接着した１素子分の前記第２のセパレータとなる領域をピックアップする際に前記未切断部分が切断されるような態様で行うことができる。 The notch of the first separator material does not cause a position shift of the region serving as the first separator for one element to which the positive electrode is bonded when the first separator material having the notch is conveyed, And when the area to be the first separator for one element to which the positive electrode is bonded is picked up, the uncut portion is cut in a mode,
The notch of the second separator material does not cause a positional shift of the region serving as the second separator for one element to which the negative electrode is bonded when the second separator material with the notch is conveyed. And when the area | region used as the said 2nd separator for 1 element to which the said negative electrode adhere | attached is picked up, it can carry out in the aspect that the said uncut part is cut | disconnected.
　前記正極の形状および前記負極の形状は、非矩形の形状であってもよい。 The shape of the positive electrode and the shape of the negative electrode may be non-rectangular shapes.
　本発明によれば、第１の作業位置において、一部に未切断部分を残しつつ第１のセパレータ材に切り込みを入れて第２の作業位置に搬送し、第２の作業位置において、正極が接着した１素子分の第１のセパレータとなる領域をピックアップして未切断部分を切断するので、正極が接着した１素子分の第１のセパレータとなる領域が搬送される際の位置ずれの発生を抑制することができる。また、第３の作業位置において、一部に未切断部分を残しつつ第２のセパレータ材に切り込みを入れて、第４の作業位置に搬送し、第４の作業位置において、負極が接着した１素子分の第２のセパレータとなる領域をピックアップして未切断部分を切断するので、負極が接着した１素子分の第２のセパレータとなる領域が搬送される際の位置ずれの発生を抑制することができる。これにより、正極および負極間の位置ずれを抑制した電極体を製造することができる。 According to the present invention, in the first working position, the first separator material is cut and conveyed to the second working position while leaving an uncut portion in part, and in the second working position, the positive electrode is Since the region that becomes the first separator for one element that has been bonded is picked up and the uncut portion is cut, the occurrence of misalignment when the region that becomes the first separator for one element to which the positive electrode is bonded is conveyed Can be suppressed. Further, at the third work position, the second separator material is cut while leaving an uncut portion in part, and conveyed to the fourth work position, and the negative electrode is adhered to the fourth work position. Since the region to be the second separator for the element is picked up and the uncut portion is cut, the occurrence of misalignment when the region to be the second separator for one element to which the negative electrode is bonded is conveyed is suppressed. be able to. Thereby, the electrode body which suppressed the position shift between a positive electrode and a negative electrode can be manufactured.
電極体の構造を示す断面図である。It is sectional drawing which shows the structure of an electrode body. 第１の実施形態における電極体の製造方法における各工程を説明するための側面図である。It is a side view for demonstrating each process in the manufacturing method of the electrode body in 1st Embodiment. 第１のセパレータ材に切り込みを入れる方法を説明するための平面図である。It is a top view for demonstrating the method of making a notch in a 1st separator material. 積層された第１のセパレータ、正極、第２のセパレータおよび負極の全体を接着する方法を説明するための図である。It is a figure for demonstrating the method to adhere | attach the laminated | stacked 1st separator, the positive electrode, the 2nd separator, and the whole negative electrode.
　以下に本発明の実施形態を示して、本発明の特徴とするところをさらに具体的に説明する。 Embodiments of the present invention will be shown below, and the features of the present invention will be described more specifically.
　まず初めに電極体の構造について簡単に説明し、続いて、電極体の製造方法について説明する。 First, the structure of the electrode body will be briefly described, and then the method for manufacturing the electrode body will be described.
　電極体１０は、図１に示すように、第１のセパレータ１１、正極１２、第２のセパレータ１３および負極１４が順に複数積層された構造を有し、例えばリチウムイオン電池などの電池に用いられる。 As shown in FIG. 1, the electrode body 10 has a structure in which a plurality of first separators 11, positive electrodes 12, second separators 13, and negative electrodes 14 are sequentially laminated, and is used for a battery such as a lithium ion battery. .
　正極１２は、アルミニウムなどの金属箔からなる正極集電体と、正極集電体の両面に形成された正極活物質とを備える。ただし、電極体１０の積層方向における最も外側に正極が存在する場合、最も外側に位置する正極は、正極集電体の片面にのみ正極活物質が形成されている構成であってもよい。 The positive electrode 12 includes a positive electrode current collector made of a metal foil such as aluminum, and a positive electrode active material formed on both surfaces of the positive electrode current collector. However, when the positive electrode is present on the outermost side in the stacking direction of the electrode body 10, the positive electrode located on the outermost side may be configured such that the positive electrode active material is formed only on one surface of the positive electrode current collector.
　負極１４は、銅などの金属箔からなる負極集電体と、負極集電体の両面に形成された負極活物質とを備える。ただし、電極体１０の積層方向における最も外側に負極が存在する場合、最も外側に位置する負極は、負極集電体の片面にのみ負極活物質が形成されている構成であってもよい。 The negative electrode 14 includes a negative electrode current collector made of a metal foil such as copper, and a negative electrode active material formed on both surfaces of the negative electrode current collector. However, when the negative electrode is present on the outermost side in the stacking direction of the electrode body 10, the negative electrode located on the outermost side may be configured such that the negative electrode active material is formed only on one surface of the negative electrode current collector.
　第１のセパレータ１１および第２のセパレータ１３としては、同じ素材のものを用いることができ、例えば、絶縁性に優れたポリプロピレン製の微多孔性薄膜によって構成することができる。 As the first separator 11 and the second separator 13, those made of the same material can be used, and for example, the first separator 11 and the second separator 13 can be constituted by a microporous thin film made of polypropylene having excellent insulating properties.
　図２は、第１の実施形態における電極体１０の製造方法における各工程を説明するための側面図である。 FIG. 2 is a side view for explaining each step in the method of manufacturing the electrode body 10 in the first embodiment.
　なお、本明細書では、切断前の長尺状の第１のセパレータ材には１１Ａの符号を付し、切断後の第１のセパレータには１１の符号を付して説明する。 In addition, in this specification, the code | symbol of 11A is attached | subjected to the elongate 1st separator material before a cutting | disconnection, and the code | symbol 11 is attached | subjected and demonstrated to a 1st separator after a cutting | disconnection.
　長尺状の第１のセパレータ材１１Ａは、セパレータ巻出部２１においてロール状に巻かれており、セパレータ巻出部２１から巻出されて、一方向に送り出される。例えば、長尺状のＰＥＴフィルムの上に長尺状の第１のセパレータ材１１Ａを重ね、長尺状のＰＥＴフィルムを一方向に搬送することによって、第１のセパレータ材１１Ａを一方向に搬送する。 The long first separator material 11 </ b> A is wound in a roll shape at the separator unwinding portion 21, unwound from the separator unwinding portion 21, and sent out in one direction. For example, the first separator material 11A is transported in one direction by stacking the long first separator material 11A on the long PET film and transporting the long PET film in one direction. To do.
　初めに、長尺状の第１のセパレータ材１１Ａの上に正極１２を載せて、正極１２を第１のセパレータ材１１Ａに接着する。 First, the positive electrode 12 is placed on the long first separator material 11A, and the positive electrode 12 is bonded to the first separator material 11A.
　具体的には、予め用意した正極１２を、長尺状の第１のセパレータ材１１Ａの幅方向における一端Ｓから所定の距離Ｈの位置に載せる。この実施形態において、第１のセパレータ材１１Ａの幅方向における一端Ｓは、図３に示すように、正極１２が接着されたときに、正極タブ１２Ａが突出している側の端である。 Specifically, the positive electrode 12 prepared in advance is placed at a predetermined distance H from one end S in the width direction of the long first separator material 11A. In this embodiment, one end S in the width direction of the first separator material 11A is the end on the side from which the positive electrode tab 12A protrudes when the positive electrode 12 is bonded, as shown in FIG.
　そして、第１のセパレータ材１１Ａ上に載置された正極１２の上側および下側から、ヒーターを内蔵した接着部２２によって挟み込み、加熱しながら加圧する熱圧着の方法で、正極１２を第１のセパレータ材１１Ａに接着する。本実施形態では、図３に示すように、正極１２が第１のセパレータ材１１Ａに接着された状態において、正極タブ１２Ａは、第１のセパレータ材１１Ａの一端Ｓの外側に突出している。 Then, the positive electrode 12 is attached to the first positive electrode 12 by the thermocompression bonding method in which the heater 12 is sandwiched between the upper part and the lower part of the positive electrode 12 placed on the first separator material 11A and heated and pressurized. Adhere to the separator material 11A. In the present embodiment, as shown in FIG. 3, in a state where the positive electrode 12 is bonded to the first separator material 11A, the positive electrode tab 12A protrudes outside the one end S of the first separator material 11A.
　なお、正極１２を第１のセパレータ材１１Ａに接着する方法が熱圧着に限定されることはなく、熱圧着以外の方法により接着してもよい。 In addition, the method of adhering the positive electrode 12 to the first separator material 11A is not limited to thermocompression bonding, and may be adhered by a method other than thermocompression bonding.
　続いて、第１の作業位置Ｔ１において、切断機構部２３により、正極１２の位置に基づいて、一部に未切断部分を残しつつ、第１のセパレータ材１１Ａに切り込みを入れる。 Subsequently, at the first work position T1, the cutting mechanism unit 23 cuts the first separator material 11A while leaving an uncut portion in part based on the position of the positive electrode 12.
　具体的には、切断機構部２３は、図示しないカメラを備えており、カメラによって正極１２を含む第１のセパレータ材１１Ａを撮像し、撮像した画像に基づいて、正極１２の位置に応じて、切断刃２３ａにより、第１のセパレータ材１１Ａに切り込み３１を入れる。 Specifically, the cutting mechanism unit 23 includes a camera (not shown), images the first separator material 11A including the positive electrode 12 by the camera, and based on the captured image, according to the position of the positive electrode 12, A cut 31 is made in the first separator material 11A by the cutting blade 23a.
　この実施形態では、図３に示すように、正極１２の外周辺のうち、正極タブ１２Ａが設けられている辺以外の辺にそれぞれ沿った位置で、第１のセパレータ材１１Ａに切り込み３１を入れる。このとき、上述したように、正極１２の周囲が全て切り取られないように、切断されていない部分である未切断部分３５が残るように、切り込み３１を入れる。すなわち、切り込み３１は、上述の未切断部分３５に対する切断部分となる。図３では、３箇所の未切断部分３５が形成された例を示している。 In this embodiment, as shown in FIG. 3, a cut 31 is made in the first separator material 11A at positions along the outer periphery of the positive electrode 12 other than the side where the positive electrode tab 12A is provided. . At this time, as described above, the cuts 31 are made so that the uncut portion 35 that is not cut is left so that the entire periphery of the positive electrode 12 is not cut off. That is, the cut 31 is a cut portion with respect to the uncut portion 35 described above. FIG. 3 shows an example in which three uncut portions 35 are formed.
　ここで、切り込み３１は、後の工程で、切り込み３１を入れた第１のセパレータ材１１Ａを搬送する際に、切り込み３１により囲まれた領域と他の領域との間に位置ずれが生じず、かつ、後述の正極用搬送ヘッド２４により、切り込み３１により囲まれた領域をピックアップする際に、未切断部分３５が切断されて、１素子分の第１のセパレータ１１を第１のセパレータ材１１Ａから確実に分離することができるような態様で形成する。 Here, the notch 31 does not cause a positional shift between the region surrounded by the notch 31 and the other region when the first separator material 11A into which the notch 31 is put is conveyed in a later step. And when picking up the area | region enclosed by the notch 31 with the conveyance head 24 for positive electrodes mentioned later, the uncut part 35 is cut | disconnected, and the 1st separator 11 for 1 element is taken from the 1st separator material 11A. It forms in the aspect which can isolate | separate reliably.
　切断機構部２３が備える切断刃２３ａは、平面視で図３の切断部分である切り込み３１に対応する形状を有している。第１のセパレータ材１１Ａの上方から切断刃２３ａを押しつけることにより、図３に示すように、未切断部分３５を残しつつ、切り込み３１を入れることができる。 The cutting blade 23a with which the cutting mechanism part 23 is provided has a shape corresponding to the cut 31 which is a cutting part of FIG. By pressing the cutting blade 23a from above the first separator material 11A, the cut 31 can be made while leaving the uncut portion 35, as shown in FIG.
　なお、未切断部分３５は、３箇所未満でもよく、また、４箇所以上であってもよい。後の工程で未切断部分３５を切り離す、あるいは分離する際に、容易に切断できるように、未切断部分３５の数は少ない方が好ましく、また、切り込み３１の長さ方向に沿った未切断部分３５の長さは短い方が好ましい。ただし、未切断部分３５の数を少なくした場合、および、未切断部分３５の長さを短くした場合には、切り込み３１を入れた第１のセパレータ材１１Ａの搬送時に、後に第１のセパレータ１１となる領域に位置ずれが生じる可能性がある。このため、未切断部分３５の数や長さは、切断容易性、および、切り込み３１を入れた第１のセパレータ材１１Ａの搬送時における位置ずれ防止などの点を考慮して、適切に設定する必要がある。 In addition, the uncut part 35 may be less than three places, and may be four or more places. It is preferable that the number of uncut portions 35 is small so that the uncut portion 35 can be easily cut when the uncut portion 35 is separated or separated in a later step, and the uncut portion along the length direction of the notch 31 is preferable. The length of 35 is preferably shorter. However, when the number of uncut portions 35 is reduced and when the length of the uncut portions 35 is shortened, the first separator 11 is later transferred during the transport of the first separator material 11A into which the cuts 31 are made. There is a possibility that a position shift occurs in the region. For this reason, the number and length of the uncut portions 35 are appropriately set in consideration of easiness of cutting and prevention of misalignment when the first separator material 11A including the cuts 31 is conveyed. There is a need.
　なお、正極１２の形状が図３に示すような形状に限定されることはない。正極１２の形状は非矩形の形状であってもよいし、矩形の形状であってもよい。 Note that the shape of the positive electrode 12 is not limited to the shape shown in FIG. The shape of the positive electrode 12 may be a non-rectangular shape or a rectangular shape.
　第１のセパレータ材１１Ａは、図３の矢印Ｙ１の方向に搬送される。すなわち、第１のセパレータ材１１Ａの、第１の作業位置Ｔ１で切り込み３１が入れられた部分、すなわち、正極１２が接着した１素子分の第１のセパレータ１１となる領域は、第１の作業位置Ｔ１とは異なる第２の作業位置Ｔ２に搬送される。 The first separator material 11A is conveyed in the direction of arrow Y1 in FIG. That is, the portion of the first separator material 11A where the notch 31 is made at the first work position T1, that is, the region that becomes the first separator 11 for one element to which the positive electrode 12 is bonded is the first work. It is transported to a second work position T2 different from the position T1.
　続いて、第２の作業位置Ｔ２において、正極用搬送ヘッド２４により、正極１２が接着した１素子分の第１のセパレータ１１となる領域をピックアップして未切断部分３５を切断する。すなわち、正極用搬送ヘッド２４により、正極１２が接着した１素子分の第１のセパレータ１１となる領域を吸着して、正極用搬送ヘッド２４を上昇させることにより、未切断部分３５を切断して、第１のセパレータ材１１Ａから、正極１２が接着した１素子分の第１のセパレータ１１を分離する。これにより、正極１２が接着した第１のセパレータ１１、すなわち１素子分の第１のセパレータ１１が得られる。 Subsequently, at the second work position T2, the positive electrode transport head 24 picks up an area to be the first separator 11 for one element to which the positive electrode 12 is adhered, and cuts the uncut portion 35. That is, the positive electrode transport head 24 adsorbs a region to be the first separator 11 for one element to which the positive electrode 12 is adhered, and the positive electrode transport head 24 is lifted to cut the uncut portion 35. Then, the first separator 11 for one element to which the positive electrode 12 is bonded is separated from the first separator material 11A. Thereby, the 1st separator 11 which the positive electrode 12 adhere | attached, ie, the 1st separator 11 for 1 element, is obtained.
　続いて、正極用搬送ヘッド２４により、ピックアップした、正極１２が接着した第１のセパレータ１１を積層ステージ２５に搬送し、正極１２を図示しないカメラで認識し、位置・姿勢を補正して、積層ステージ２５上に載置する。積層ステージ２５上に載置された第１のセパレータ１１および正極１２は、次の工程で、負極１４が接着した、１素子分の第２のセパレータ１３がその上に積層されるまで、必要に応じて、積層爪２７によって上方から押さえられる。 Subsequently, the first separator 11 picked up by the positive electrode conveying head 24 is conveyed to the lamination stage 25, the positive electrode 12 is recognized by a camera (not shown), the position and orientation are corrected, and the lamination is performed. Place on stage 25. The first separator 11 and the positive electrode 12 placed on the stacking stage 25 are necessary until the second separator 13 for one element, to which the negative electrode 14 is bonded, is stacked on the first separator 11 and the positive electrode 12 in the next step. Accordingly, the laminated claw 27 is pressed from above.
　なお、図３では、第２の作業位置Ｔ２において、正極１２が接着した１素子分の第１のセパレータ１１が正極用搬送ヘッド２４によってピックアップされて分離された状態の第１のセパレータ材１１Ａを示している。 In FIG. 3, the first separator material 11A in a state where the first separator 11 for one element to which the positive electrode 12 is bonded is picked up and separated by the positive electrode transport head 24 at the second work position T2. Show.
　このように、本実施形態における電極体１０の製造方法では、第１の作業位置Ｔ１において、正極１２の位置に基づいて、一部に未切断部分３５を残しつつ第１のセパレータ材１１Ａに切り込み３１を入れ、切り込み３１を入れた第１のセパレータ材１１Ａを第１の作業位置Ｔ１から第２の作業位置Ｔ２に搬送する。そして、第２の作業位置Ｔ２において、正極１２が接着した１素子分の第１のセパレータ１１となる領域をピックアップし、正極用搬送ヘッド２４を上昇させることにより未切断部分３５を切断して、１素子分の第１のセパレータ１１を第１のセパレータ材１１Ａから分離する。その後、分離した１素子分の第１のセパレータ１１を積層ステージ２５に搬送するようにしている。このように、正極１２の位置に基づいて第１のセパレータ材１１Ａを切断する際に、未切断部分３５を残しつつ切り込み３１を入れるようにしているので、切り込み３１を入れた第１のセパレータ材１１Ａを第１の作業位置Ｔ１から第２の作業位置Ｔ２に搬送する際に、切断後に第１のセパレータ１１となる領域の位置ずれを抑制することができる。 Thus, in the manufacturing method of the electrode body 10 according to the present embodiment, the first separator material 11A is cut while leaving the uncut portion 35 in a part based on the position of the positive electrode 12 at the first work position T1. 31 is inserted, and the first separator material 11A into which the cut 31 has been made is conveyed from the first work position T1 to the second work position T2. Then, at the second work position T2, a region to be the first separator 11 for one element to which the positive electrode 12 is bonded is picked up, and the uncut portion 35 is cut by raising the positive electrode transport head 24, The first separator 11 for one element is separated from the first separator material 11A. Thereafter, the separated first separator 11 for one element is conveyed to the stacking stage 25. In this way, when the first separator material 11A is cut based on the position of the positive electrode 12, the cut 31 is made while leaving the uncut portion 35, so the first separator material with the cut 31 is inserted. When transporting 11A from the first work position T1 to the second work position T2, it is possible to suppress the positional deviation of the region that becomes the first separator 11 after cutting.
　例えば、正極集電体の片面にのみ正極活物質が形成されている正極の場合、反りが生じていることがある。反りが生じている正極は、第１のセパレータ材１１Ａに接着されている状態では反りが抑えられているが、第１のセパレータ材１１Ａを切断する際に、未切断部分を残さずに正極１２の周囲を切断すると、抑えられていた反りが戻って、第１の作業位置Ｔ１から第２の作業位置Ｔ２に搬送する際に位置ずれが生じやすくなる。 For example, in the case of a positive electrode in which a positive electrode active material is formed only on one side of the positive electrode current collector, warping may occur. The positive electrode in which the warp has occurred is suppressed in the state of being bonded to the first separator material 11A, but when the first separator material 11A is cut, the positive electrode 12 does not leave an uncut portion. When the perimeter of the sheet is cut, the warpage that has been suppressed is returned, and a positional shift is likely to occur when transporting from the first work position T1 to the second work position T2.
　しかしながら、本実施形態によれば、上述したように、第１のセパレータ材１１Ａに切り込み３１を入れる際に、未切断部分３５を残すことにより、切断後に第１のセパレータ１１となる領域は、未切断部分３５を介して第１のセパレータ材１１Ａと接続されているため、位置ずれの発生を抑制することができる。 However, according to the present embodiment, as described above, when the cut 31 is made in the first separator material 11A, the uncut portion 35 is left so that the region that becomes the first separator 11 after cutting is not yet formed. Since it is connected to the first separator material 11 </ b> A via the cut portion 35, it is possible to suppress the occurrence of misalignment.
　特に、第１のセパレータ材１１Ａの切り込み３１は、切り込みを入れた第１のセパレータ材１１Ａを搬送する際に、正極１２が接着した１素子分の第１のセパレータ１１となる領域の位置ずれが生じず、かつ、正極１２が接着した１素子分の第１のセパレータ１１となる領域をピックアップする際に未切断部分３５が切断されるような態様で行うので、切断後に１素子分の第１のセパレータ１１となる領域の位置ずれの発生を効果的に抑制することができる。 In particular, the notch 31 of the first separator material 11 </ b> A has a positional deviation of the region that becomes the first separator 11 for one element to which the positive electrode 12 is bonded when the first separator material 11 </ b> A with the notch is conveyed. This is performed in such a manner that the uncut portion 35 is cut when picking up the region that does not occur and becomes the first separator 11 for one element to which the positive electrode 12 is bonded. It is possible to effectively suppress the occurrence of positional deviation in the region that becomes the separator 11.
　また、図３に示すように、本実施形態における正極１２の形状は、非矩形の形状であるが、この場合でも、切断後に第１のセパレータ１１となる領域の位置ずれの発生を抑制することができる。 In addition, as shown in FIG. 3, the shape of the positive electrode 12 in the present embodiment is a non-rectangular shape, but even in this case, the occurrence of misalignment of the region that becomes the first separator 11 after cutting is suppressed. Can do.
　さらに、第１のセパレータ材１１Ａに切り込み３１を入れる工程と、正極１２が接着した１素子分の第１のセパレータ１１となる領域をピックアップして第１のセパレータ材１１Ａから分離する工程とを、別の位置で行うようにしているので、製造工程の効率を向上させることができる。 Furthermore, a step of making a cut 31 in the first separator material 11A, and a step of picking up a region to be the first separator 11 for one element to which the positive electrode 12 is bonded and separating it from the first separator material 11A, Since it is performed at a different position, the efficiency of the manufacturing process can be improved.
　すなわち、第１のセパレータ材１１Ａに切り込み３１を入れる工程と、正極１２が接着した１素子分の第１のセパレータ１１をピックアップして第１のセパレータ材１１Ａから分離する工程とを同じ位置で行う場合には、切断機構部２３と正極用搬送ヘッド２４とが同じ位置で作業をすることになり、作業効率が低下する。しかし、本実施形態によれば、切断機構部２３は、第１の作業位置Ｔ１で切断作業を行い、正極用搬送ヘッド２４は、第２の作業位置Ｔ２で、未切断部分３５を切断しつつ、１素子分の第１のセパレータ１１のピックアップ作業を行うので、作業効率を向上させることができる。 That is, the step of making the cut 31 in the first separator material 11A and the step of picking up the first separator 11 for one element to which the positive electrode 12 is bonded and separating it from the first separator material 11A are performed at the same position. In this case, the cutting mechanism unit 23 and the positive electrode transport head 24 work at the same position, and work efficiency is reduced. However, according to the present embodiment, the cutting mechanism unit 23 performs the cutting operation at the first work position T1, and the positive electrode transport head 24 cuts the uncut portion 35 at the second work position T2. Since the pickup work of the first separator 11 for one element is performed, the work efficiency can be improved.
　なお、正極用搬送ヘッド２４によって、正極１２が接着した第１のセパレータ１１がピックアップされた後、第１のセパレータ材１１Ａは回収される。 In addition, after the first separator 11 to which the positive electrode 12 is bonded is picked up by the positive electrode transport head 24, the first separator material 11A is collected.
　上述した工程を、負極１４に対しても行う。すなわち、初めに、長尺状の第２のセパレータ材（不図示）の上に負極１４を載せて、負極１４を第２のセパレータ材に接着する。正極１２を第１のセパレータ材１１Ａに接着するときと同様に、負極１４は、第２のセパレータ材上の、幅方向における一端から所定の距離の位置に置いて接着する。第２のセパレータ材の幅方向における一端とは、負極１４を接着したときに、負極タブが突出している側の端である。 The above-described process is also performed on the negative electrode 14. That is, first, the negative electrode 14 is placed on a long second separator material (not shown), and the negative electrode 14 is bonded to the second separator material. Similarly to the case where the positive electrode 12 is bonded to the first separator material 11A, the negative electrode 14 is bonded to a position on the second separator material at a predetermined distance from one end in the width direction. The one end in the width direction of the second separator material is the end on the side from which the negative electrode tab protrudes when the negative electrode 14 is bonded.
　続いて、第３の作業位置において、負極１４の位置に基づいて、一部に未切断部分を残しつつ、第２のセパレータ材に切り込みを入れる。第２のセパレータ材に切り込みを入れる方法は、第１のセパレータ材に切り込みを入れる方法と同じである。 Subsequently, at the third work position, the second separator material is cut based on the position of the negative electrode 14 while leaving an uncut portion in part. The method of cutting the second separator material is the same as the method of cutting the first separator material.
　第２のセパレータ材も、一方向に搬送される。第２のセパレータ材の、第３の作業位置で切り込みが入れられた部分、すなわち負極１４が接着した１素子分の第２のセパレータ１３となる領域は、第３の作業位置とは異なる第４の作業位置に搬送される。 The second separator material is also conveyed in one direction. The portion of the second separator material that is cut at the third work position, that is, the region that becomes the second separator 13 for one element to which the negative electrode 14 is bonded is different from the third work position. It is conveyed to the work position.
　続いて、第４の作業位置において、負極用搬送ヘッド２６により、負極１４が接着した１素子分の第２のセパレータ１３となる領域をピックアップして未切断部分を切断する。すなわち、負極用搬送ヘッド２６により、負極１４が接着した１素子分の第２のセパレータ１３となる領域を吸着して、負極用搬送ヘッド２６を上昇させることにより、未切断部分を切断して、第２のセパレータ材から、負極１４が接着した１素子分の第２のセパレータ１３を分離する。これにより、負極１４が接着した第２のセパレータ１３、すなわち１素子分の第２のセパレータ１３が得られる。 Subsequently, at the fourth work position, the negative electrode transport head 26 picks up an area to be the second separator 13 for one element to which the negative electrode 14 is bonded, and cuts the uncut portion. That is, the negative electrode transport head 26 adsorbs a region to be the second separator 13 for one element to which the negative electrode 14 is adhered, and lifts the negative electrode transport head 26 to cut an uncut portion. The second separator 13 for one element to which the negative electrode 14 is bonded is separated from the second separator material. Thereby, the 2nd separator 13 which the negative electrode 14 adhere | attached, ie, the 2nd separator 13 for 1 element, is obtained.
　続いて、負極用搬送ヘッド２６により、ピックアップした、負極１４が接着した第２のセパレータ１３を積層ステージ２５に搬送し、正極１２と負極１４との間の位置を合わせながら、第２のセパレータ１３を第１のセパレータ１１の上、より具体的には、第１のセパレータ１１の上に接着している正極１２の上に積層する。正極１２と負極１４との間の位置合わせは、例えば、積層ステージ２５上における正極１２の位置を検出し、検出した正極１２の位置と積層後の負極１４の位置が一致するように行う。 Subsequently, the second separator 13 picked up by the negative electrode transport head 26 is transported to the stacking stage 25, and the second separator 13 is aligned with the position between the positive electrode 12 and the negative electrode 14. Is laminated on the first separator 11, more specifically, on the positive electrode 12 adhered on the first separator 11. The alignment between the positive electrode 12 and the negative electrode 14 is performed, for example, by detecting the position of the positive electrode 12 on the stacking stage 25 and aligning the detected position of the positive electrode 12 with the position of the negative electrode 14 after stacking.
　積層された第２のセパレータ１３および負極１４は、必要に応じて、次の工程で正極１２が接着した第１のセパレータ１１がその上に積層されるまで、積層爪２７によって上方から押さえられる。 The laminated second separator 13 and negative electrode 14 are pressed from above by the laminating claws 27 as needed until the first separator 11 to which the positive electrode 12 is bonded is laminated on the next step.
　この場合も、負極１４の位置に基づいて第２のセパレータ材を切断する際に、未切断部分を残しつつ切り込みを入れるようにしているので、切り込みを入れた第２のセパレータ材を第３の作業位置から第４の作業位置に搬送する際に、切断後に第２のセパレータ１３となる領域の位置ずれを抑制することができる。 Also in this case, when the second separator material is cut based on the position of the negative electrode 14, the cut is made while leaving the uncut portion, so that the second separator material with the cut is used as the third separator material. When transporting from the work position to the fourth work position, it is possible to suppress the displacement of the region that becomes the second separator 13 after cutting.
　特に、第２のセパレータ材の切り込みは、切り込みを入れた第２のセパレータ材を搬送する際に、負極１４が接着した１素子分の第２のセパレータ１３となる領域の位置ずれが生じず、かつ、負極１４が接着した１素子分の第２のセパレータ１３となる領域をピックアップする際に未切断部分が切断されるような態様で行うので、切断後に１素子分の第２のセパレータ１３となる領域の位置ずれの発生を効果的に抑制することができる。 In particular, the notch of the second separator material does not cause a position shift of the region to be the second separator 13 for one element to which the negative electrode 14 is adhered when the second separator material with the notch is conveyed. Moreover, since the uncut portion is cut when picking up the region to be the second separator 13 for one element to which the negative electrode 14 is bonded, the second separator 13 for one element after cutting It is possible to effectively suppress the occurrence of positional deviation in the region.
　また、第２のセパレータ材に切り込みを入れる工程と、負極１４が接着した１素子分の第２のセパレータ１３となる領域をピックアップして第２のセパレータ材から分離する工程とを、別の位置で行うようにしているので、製造工程の効率を向上させることができる。 In addition, the step of cutting the second separator material and the step of picking up the region to be the second separator 13 for one element to which the negative electrode 14 is bonded and separating it from the second separator material are performed at different positions. Therefore, the efficiency of the manufacturing process can be improved.
　上述したように、本実施形態における電極体１０の製造方法では、切り込みを入れた第１のセパレータ材１１Ａを、第１の作業位置Ｔ１から第２の作業位置Ｔ２へと搬送する際に、切断により得られる、正極１２が接着した１素子分の第１のセパレータ１１の位置ずれの発生を抑制することができる。また、切り込みを入れた第２のセパレータ材を、第３の作業位置から第４の作業位置へと搬送する際に、切断により得られる、負極１４が接着した１素子分の第２のセパレータ１３の位置ずれの発生を抑制することができる。さらに、正極１２が接着した１素子分の第１のセパレータ１１および負極１４が接着した１素子分の第２のセパレータ１３をそれぞれ積層する前に、正極１２と負極１４との間の位置合わせを行うので、製造される電極体１０の正極１２と負極１４との間の位置ずれをより効果的に抑制することができる。 As described above, in the method of manufacturing the electrode body 10 according to the present embodiment, the first separator material 11A with the cuts is cut when transported from the first work position T1 to the second work position T2. The occurrence of displacement of the first separator 11 for one element to which the positive electrode 12 is bonded can be suppressed. Further, when the second separator material into which the cut has been made is transported from the third work position to the fourth work position, the second separator 13 corresponding to one element to which the negative electrode 14 is bonded is obtained by cutting. The occurrence of misalignment can be suppressed. Further, before laminating the first separator 11 for one element to which the positive electrode 12 is bonded and the second separator 13 for one element to which the negative electrode 14 is bonded, the alignment between the positive electrode 12 and the negative electrode 14 is performed. Since it performs, the position shift between the positive electrode 12 and the negative electrode 14 of the electrode body 10 manufactured can be suppressed more effectively.
　その後、続いて得られる、正極１２が接着した第１のセパレータ１１を、正極用搬送ヘッド２４によって積層ステージ２５に搬送して、正極１２と負極１４との間の位置を合わせながら、第１のセパレータ１１を第２のセパレータ１３の上、より具体的には、第２のセパレータ１３の上に接着している負極１４の上に積層する。積層された第１のセパレータ１１および正極１２は、必要に応じて、次の工程で負極１４が接着した第２のセパレータ１３がその上に積層されるまで、積層爪２７によって上方から押さえられる。 Thereafter, the first separator 11 to which the positive electrode 12 is bonded is transferred to the stacking stage 25 by the positive electrode transfer head 24, and the first separator 11 is aligned while the position between the positive electrode 12 and the negative electrode 14 is adjusted. The separator 11 is laminated on the second separator 13, more specifically, on the negative electrode 14 bonded on the second separator 13. The laminated first separator 11 and the positive electrode 12 are pressed from above by the laminating claws 27 until the second separator 13 to which the negative electrode 14 is bonded is laminated on the first separator 11 and the positive electrode 12 as necessary.
　以後、正極１２および負極１４の積層枚数が所定枚数となるまで、負極１４が接着した第２のセパレータ１３と、正極１２が接着した第１のセパレータ１１の積層を繰り返し行う。 Thereafter, the stacking of the second separator 13 to which the negative electrode 14 is bonded and the first separator 11 to which the positive electrode 12 is bonded is repeatedly performed until the number of stacked layers of the positive electrode 12 and the negative electrode 14 reaches a predetermined number.
　最後に、複数積層されている第１のセパレータ１１、正極１２、第２のセパレータ１３および負極１４の全体を接着する。例えば、図４に示すように、第１のセパレータ１１、正極１２、第２のセパレータ１３および負極１４が積層された積層体の上方から、ヒーターが内蔵されている熱圧着ヘッド４０を押しつけることによって、第１のセパレータ１１、正極１２、第２のセパレータ１３および負極１４の全体を熱圧着する。 Finally, the first separator 11, the positive electrode 12, the second separator 13, and the negative electrode 14 that are stacked in plurality are bonded together. For example, as shown in FIG. 4, by pressing a thermocompression bonding head 40 containing a heater from above the laminated body in which the first separator 11, the positive electrode 12, the second separator 13, and the negative electrode 14 are laminated. The entire first separator 11, positive electrode 12, second separator 13 and negative electrode 14 are thermocompression bonded.
　なお、ヒーターは、熱圧着ヘッド４０だけではなく、積層ステージ２５にも内蔵されていてもよいし、熱圧着ヘッド４０には内蔵されずに、積層ステージ２５にだけ内蔵されていてもよい。 The heater may be incorporated not only in the thermocompression bonding head 40 but also in the lamination stage 25, or may be incorporated only in the lamination stage 25 without being incorporated in the thermocompression bonding head 40.
　以上の工程により、電極体１０が製造される。 The electrode body 10 is manufactured by the above process.
　本発明は、上記実施形態に限定されるものではなく、本発明の範囲内において、種々の応用、変形を加えることが可能である。 The present invention is not limited to the above-described embodiment, and various applications and modifications can be made within the scope of the present invention.
　例えば、上記実施形態における電極体の製造方法では、電極体１０を構成する第１のセパレータ１１、正極１２、第２のセパレータ１３および負極１４の全てを積層した後に、全体を接着した。しかし、第１のセパレータ１１および第２のセパレータ１３をそれぞれ積層する毎に、積層された第１のセパレータ１１、正極１２、第２のセパレータ１３および負極１４の全体を接着するようにしてもよい。 For example, in the method of manufacturing an electrode body in the above embodiment, the first separator 11, the positive electrode 12, the second separator 13, and the negative electrode 14 constituting the electrode body 10 are all laminated and then bonded together. However, every time the first separator 11 and the second separator 13 are laminated, the laminated first separator 11, positive electrode 12, second separator 13, and negative electrode 14 may be bonded together. .
　例えば、正極用搬送ヘッド２４にヒーターを内蔵しておき、正極１２が接着した第１のセパレータ１１を積層した際に、正極用搬送ヘッド２４によって熱圧着を行うようにしてもよい。同様に、負極用搬送ヘッド２６にヒーターを内蔵しておき、負極１４が接着した第２のセパレータ１３を積層した際に、負極用搬送ヘッド２６によって熱圧着を行うようにしてもよい。このような構成とすることにより、上述した熱圧着ヘッド４０を省略することができる。 For example, a heater may be incorporated in the positive electrode transport head 24, and the first separator 11 to which the positive electrode 12 is bonded may be thermocompression bonded by the positive electrode transport head 24. Similarly, a heater may be incorporated in the negative electrode transport head 26 so that when the second separator 13 to which the negative electrode 14 is bonded is laminated, thermocompression bonding may be performed by the negative electrode transport head 26. With such a configuration, the above-described thermocompression bonding head 40 can be omitted.
　製造される電極体１０は、正極と、負極と、正極および負極の間に配置されるセパレータとを備える構造であればよく、その形状はどのようなものであってもよい。例えば、積層される全ての正極の形状が同一ではなくてもよいし、積層される全ての負極形状が同一ではなくてもよい。例えば、積層方向の下層に位置する正極および負極に対して、上層に位置する正極および負極の大きさが小さく、積層方向において段差を有するような形状であってもよい。 The manufactured electrode body 10 may have any structure as long as it includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. For example, all the positive electrodes stacked may not have the same shape, and all the negative electrodes stacked may not have the same shape. For example, the positive electrode and the negative electrode positioned in the lower layer in the stacking direction may be smaller in size than the positive electrode and the negative electrode positioned in the upper layer and may have a step in the stacking direction.
１０　　電極体
１１　　第１のセパレータ
１１Ａ　第１のセパレータ材
１２　　正極
１２Ａ　正極タブ
１３　　第２のセパレータ
１４　　負極
２１　　セパレータ巻出部
２２　　接着部
２３　　切断機構部
２３ａ　切断刃
２４　　正極用搬送ヘッド
２５　　積層ステージ
２６　　負極用搬送ヘッド
２７　　積層爪
３１　　切り込み
３５　　未切断部分
４０　　熱圧着ヘッド
Ｔ１　　第１の作業位置
Ｔ２　　第２の作業位置 DESCRIPTION OF SYMBOLS 10 Electrode body 11 1st separator 11A 1st separator material 12 Positive electrode 12A Positive electrode tab 13 2nd separator 14 Negative electrode 21 Separator unwinding part 22 Adhesion part 23 Cutting mechanism part 23a Cutting blade 24 Positive electrode conveyance head 25 Laminating stage 26 Negative electrode transport head 27 Lamination claw 31 Notch 35 Uncut portion 40 Thermocompression bonding head T1 First work position T2 Second work position

Claims (3)

  1. 　正極と、負極と、前記正極および前記負極の間に配置されるセパレータとを備える電極体の製造方法であって、
    　長尺状の第１のセパレータ材に前記正極を接着する工程と、
    　第１の作業位置において、前記正極の位置に基づいて、一部に未切断部分を残しつつ、前記正極が接着した１素子分の第１のセパレータとなる領域を囲む態様で、前記第１のセパレータ材に切り込みを入れる工程と、
    　前記正極が接着した１素子分の前記第１のセパレータとなる領域が、前記第１の作業位置とは異なる第２の作業位置に位置するように、切り込みを入れた前記第１のセパレータ材を搬送する工程と、
    　前記第２の作業位置において、前記正極が接着した１素子分の前記第１のセパレータとなる領域をピックアップして前記未切断部分を切断し、前記第１のセパレータ材から、前記正極が接着した１素子分の前記第１のセパレータを分離する工程と、
    　分離した、前記正極が接着した１素子分の前記第１のセパレータを積層ステージに搬送する工程と、
    　長尺状の第２のセパレータ材に前記負極を接着する工程と、
    　第３の作業位置において、前記負極の位置に基づいて、一部に未切断部分を残しつつ、前記負極が接着した１素子分の第２のセパレータとなる領域を囲む態様で、前記第２のセパレータ材に切り込みを入れる工程と、
    　前記負極が接着した１素子分の前記第２のセパレータとなる領域が、前記第３の作業位置とは異なる第４の作業位置に位置するように、切り込みを入れた前記第２のセパレータ材を搬送する工程と、
    　前記第４の作業位置において、前記負極が接着した１素子分の前記第２のセパレータとなる領域をピックアップして前記未切断部分を切断し、前記第２のセパレータ材から、前記負極が接着した１素子分の前記第２のセパレータを分離する工程と、
    　分離した、前記負極が接着した１素子分の前記第２のセパレータを前記積層ステージに搬送する工程と、
    　前記積層ステージで、前記正極が接着した１素子分の前記第１のセパレータと、前記負極が接着した１素子分の前記第２のセパレータを積層する工程と、
    を有することを特徴とする電極体の製造方法。     A method for producing an electrode body comprising a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode,
    Adhering the positive electrode to the long first separator material;
    In the first working position, in a form surrounding the region to be a first separator for one element to which the positive electrode is bonded, while leaving an uncut portion in part based on the position of the positive electrode, Cutting the separator material, and
    The first separator material into which the first separator material is cut so that the region serving as the first separator for one element to which the positive electrode is bonded is located at a second work position different from the first work position. A conveying step;
    In the second working position, the region to be the first separator for one element to which the positive electrode is bonded is picked up, the uncut portion is cut, and the positive electrode is bonded from the first separator material. Separating the first separator for one element;
    A step of transporting the separated first separator for one element to which the positive electrode is bonded to a lamination stage;
    Adhering the negative electrode to the long second separator material;
    In a third working position, in a mode of surrounding the region serving as a second separator for one element to which the negative electrode is adhered, leaving an uncut portion in part based on the position of the negative electrode, Cutting the separator material, and
    The second separator material into which the second separator material is cut so that the region serving as the second separator for one element to which the negative electrode is bonded is located at a fourth work position different from the third work position. A conveying step;
    In the fourth work position, the region to be the second separator for one element to which the negative electrode is bonded is picked up, the uncut portion is cut, and the negative electrode is bonded from the second separator material. Separating the second separator for one element;
    Transporting the separated second separator for one element to which the negative electrode is bonded to the stacking stage;
    Laminating the first separator for one element to which the positive electrode is bonded and the second separator for one element to which the negative electrode is bonded in the stacking stage;
    A method for producing an electrode body, comprising:
  2. 　前記第１のセパレータ材の切り込みは、切り込みを入れた前記第１のセパレータ材を搬送する際に、前記正極が接着した１素子分の前記第１のセパレータとなる領域の位置ずれが生じず、かつ、前記正極が接着した１素子分の前記第１のセパレータとなる領域をピックアップする際に前記未切断部分が切断されるような態様で行い、
    　前記第２のセパレータ材の切り込みは、切り込みを入れた前記第２のセパレータ材を搬送する際に、前記負極が接着した１素子分の前記第２のセパレータとなる領域の位置ずれが生じず、かつ、前記負極が接着した１素子分の前記第２のセパレータとなる領域をピックアップする際に前記未切断部分が切断されるような態様で行うことを特徴とする電極体の製造方法。     The notch of the first separator material does not cause a position shift of the region serving as the first separator for one element to which the positive electrode is bonded when the first separator material having the notch is conveyed, And when the area to be the first separator for one element to which the positive electrode is bonded is picked up, the uncut portion is cut in a mode,
    The notch of the second separator material does not cause a positional shift of the region serving as the second separator for one element to which the negative electrode is bonded when the second separator material with the notch is conveyed. And the manufacturing method of the electrode body characterized by performing in the aspect that the said uncut part is cut | disconnected when picking up the area | region used as the said 2nd separator for 1 element to which the said negative electrode adhere | attached.
  3. 　前記正極の形状および前記負極の形状は、非矩形の形状であることを特徴とする請求項１または２に記載の電極体の製造方法。 3. The method of manufacturing an electrode body according to claim 1, wherein the shape of the positive electrode and the shape of the negative electrode are non-rectangular shapes.
PCT/JP2017/032345 2016-12-15 2017-09-07 Electrode body production method WO2018110001A1 (en)

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JP7103291B2 (en) 2019-03-26 2022-07-20 株式会社豊田自動織機 Electrode manufacturing equipment with separator and electrode manufacturing method with separator

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