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WO2013031642A1 - Dispositif accumulateur - Google Patents

Dispositif accumulateur Download PDF

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Publication number
WO2013031642A1
WO2013031642A1 PCT/JP2012/071328 JP2012071328W WO2013031642A1 WO 2013031642 A1 WO2013031642 A1 WO 2013031642A1 JP 2012071328 W JP2012071328 W JP 2012071328W WO 2013031642 A1 WO2013031642 A1 WO 2013031642A1
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WO
WIPO (PCT)
Prior art keywords
bag
electrode member
positive electrode
separator
shaped separator
Prior art date
Application number
PCT/JP2012/071328
Other languages
English (en)
Japanese (ja)
Inventor
阿部一博
大塚大輔
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2013031642A1 publication Critical patent/WO2013031642A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/466—U-shaped, bag-shaped or folded
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/52—Separators
    • 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
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • 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
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/579—Devices or arrangements for the interruption of current in response to shock
    • 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
    • H01M10/052—Li-accumulators
    • 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
    • H01M2004/025—Electrodes composed of, or comprising, active material with shapes other than plane or cylindrical
    • 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 is an electricity storage device in which a positive electrode member and a negative electrode member are laminated so as to face each other via a separator, and are housed in an outer packaging material together with an electrolytic solution, wherein at least one of the positive electrode member and the negative electrode member is
  • the present invention relates to an electricity storage device having a structure housed in a bag-like separator that functions as a separator.
  • High energy density power storage devices represented by lithium ion secondary batteries, lithium ion capacitors, electric double layer capacitors, and the like are, for example, sheet-shaped current collector foils (such as aluminum foil or copper foil) and active materials (activated carbon, An electricity storage element configured by laminating a sheet-like positive electrode member and a negative electrode member formed by coating a lithium composite oxide, carbon, etc.) via a separator for preventing a short circuit due to contact between them;
  • the electrolytic solution is contained in an outer packaging material made of an aluminum can or an aluminum laminated film.
  • the power storage element is formed by alternately laminating with the negative electrode plate 52 in a state where the main part of the positive electrode plate 51 is accommodated in the bag-shaped separator 50.
  • the laminated body 53 which comprises, ie, the laminated body 53 which has the structure where the positive electrode plate 51 and the negative electrode plate 52 were laminated
  • the bag-like separator is made of a polymer material such as polypropylene resin or polyethylene resin, and shrinks (heat shrinks) when exposed to a high temperature of 80 ° C. or higher.
  • the separator heat-shrinks, and if there is not a sufficient distance between the inner edge of the separator and the electrode plate that has been secured in the past, the electrode plate contained in the inside (in the above example, the positive electrode plate) 51) breaks through the bag-shaped separator and is exposed, which may cause a short circuit with the negative electrode plate 52, resulting in low reliability. Also, in consideration of miniaturization, when the size of the bag-like separator is brought close to the size of the electrode plate to be accommodated, for example, the possibility that the electrode plate breaks through the separator due to thermal contraction of the separator becomes higher. .
  • the upper and lower separators may be bonded or welded to form a bag-shaped separator around the electrode plate to be accommodated, but in consideration of the liquid permeability of the electrolytic solution, the portion to be bonded or welded is preferably as small as possible. For example, it is conceivable to bond or weld at a plurality of points.
  • the adhesion part or welding part for forming the bag-shaped separator is small, there arises a problem that the electrode plate easily breaks through the separator due to thermal contraction of the separator.
  • the present invention solves the above-described problem, and is an electricity storage device having a structure in which at least one of a positive electrode member and a negative electrode member is accommodated in a bag-like separator, and the positive electrode member and the negative electrode accommodated in the bag-like separator It is an object of the present invention to provide a highly reliable power storage device that does not cause a short circuit due to at least one of the members breaking through and exposing the bag-shaped separator.
  • the electricity storage device of the present invention is: A positive electrode member and a negative electrode member are stacked so as to face each other via a separator, and are stored in an outer packaging material together with an electrolyte,
  • the separator is a bag-shaped separator formed in a bag shape having an opening at least on one end side, and at least one main part of the positive electrode member and the negative electrode member is accommodated in the bag-shaped separator, And, At least one of the positive electrode member and the negative electrode member accommodated in the bag-shaped separator has an angle of 90 ° or less at a corner portion located near the bottom opposite to the one end side where the bag-shaped separator is opened. It is characterized by the absence of corners with
  • a predetermined region that does not include a corner portion located at both ends of the side on the one end side of the bag-shaped separator is opened, and a region between the opening and the corner portion is closed,
  • a portion of at least one of the positive electrode member and the negative electrode member accommodated in the bag-shaped separator protrudes from the opening of the bag-shaped separator,
  • At least one of the positive electrode member and the negative electrode member accommodated in the bag-shaped separator, the corner portion located near the one end side opposite to the bottom-side vicinity side of the bag-shaped separator is 90 ° or less. It is preferable that there is no corner having an angle.
  • At least one of the positive electrode member and the negative electrode member accommodated in the bag-like separator is provided with a roundness.
  • At least one of the positive electrode member and the negative electrode member accommodated in the bag-shaped separator at least the ridge line portion formed by the surface along the thickness direction and both main surfaces of the corner portion. Is preferably chamfered.
  • the bag-like separator is particularly significant when it is made of a polymer material.
  • the corner portion of at least one of the positive electrode member and the negative electrode member accommodated in the bag-shaped separator does not have a portion having an angle of 90 ° or less. Even when a part of the bag-shaped separator is exposed to a high temperature by being placed in a high-temperature environment or subjected to a large current discharge, the corner portion of the negative electrode member is It is possible to prevent breakage of the bag-shaped separator and to prevent occurrence of a short circuit due to exposure of the positive electrode member and the negative electrode member from the bag-shaped separator.
  • a predetermined region that does not include the corner portion located at both ends of the side on the one end side of the bag-shaped separator is opened, a region between the opening and the corner portion is closed, and from the opening of the bag-shaped separator, A part of at least one of the positive electrode member and the negative electrode member accommodated in the bag-shaped separator protrudes, and at least one of the positive electrode member and the negative electrode member accommodated in the bag-shaped separator is a side near the bottom of the bag-shaped separator. Even when the corner portion located near one end on the opposite side does not have a corner portion having an angle of 90 ° or less, at least one corner portion of the positive electrode member and the negative electrode member breaks through the bag-shaped separator. Therefore, it is possible to provide a highly reliable power storage device that does not cause a short circuit.
  • At least one of the positive electrode member and the negative electrode member accommodated in the bag-shaped separator is chamfered at least at the ridge line portion formed by the surface along the thickness direction of the corner portion and the two main surfaces, whereby the corner portion is 90 °.
  • the bag-like separator functioning as the separator is made of a polymer material
  • the bag-like separator is easily shrunk by heat, and at least one corner portion of the positive electrode member and the negative electrode member accommodated in the bag-like separator is
  • FIG. 2 is a sectional view taken along line AA in FIG. 1.
  • (a) is a top view which shows the positive electrode member which comprises the electrical storage device concerning Embodiment 1 of this invention
  • (b) is a top view which shows the state accommodated in the bag-shaped separator which a positive electrode member functions as a separator
  • c) is a sectional view.
  • (a) is a plan view showing a state before heat shrinkage occurs in the bag-like separator when the corner portion of the positive electrode member is not rounded and chamfered
  • (b) It is a top view which shows typically the state after shrinkage
  • (a) is the top view which shows the state before heat contraction arises in a bag-shaped separator in the electrical storage device concerning Embodiment 1 of this invention which rounded the corner part of the positive electrode member and performed the chamfering process
  • (b) ) Is a plan view schematically showing a state after heat shrinkage has occurred in the bag-shaped separator. It is a top view which shows typically the structure of the electrical storage device concerning other embodiment (Embodiment 2) of this invention.
  • (A) is a top view which shows the state which accommodated the positive electrode member in the bag-shaped separator in the electrical storage device concerning Embodiment 2 of this invention
  • (b) is a top view which shows a negative electrode member. It is a disassembled perspective view which shows the principal part structure of the conventional electrical storage device. It is a top view which shows the state in which the positive electrode plate which comprises the conventional electrical storage device was accommodated in the bag-shaped separator.
  • FIG. 1 is a plan view of an electricity storage device (lithium ion secondary battery) according to an embodiment (Embodiment 1) of the present invention
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1
  • FIG. The top view which shows the positive electrode member which comprises the electrical storage device concerning one Embodiment (Embodiment 1) of this invention
  • FIG.5 (b) is a top view which shows the state accommodated in the bag-shaped separator which a positive electrode member functions as a separator
  • FIG. 3C is a cross-sectional view.
  • an electricity storage device (lithium ion secondary battery) 100 includes a positive electrode member 11 and a negative electrode member 12 via a separator (bag-like separator) 13.
  • a laminated body (electrode structure) 10 that is laminated so as to face each other has a structure that is accommodated in an outer packaging material 20 together with an electrolytic solution 14.
  • the electricity storage device (lithium ion secondary battery) 100 is connected to the positive electrode member 11 via a plurality of current collecting members 15, and is the same as the positive electrode terminal 16 a led out from one end side of the outer packaging material 20.
  • a negative electrode terminal 16 b connected to the negative electrode member 12 through a plurality of current collecting members 15 and led out from the other end side of the outer packaging material 20 is provided.
  • the positive electrode member (positive electrode layer) 11 includes, for example, LiCoO 2 that is a positive electrode active material, polyvinylidene fluoride (PVDF) that is a binder, and acetylene black that is a conductive auxiliary agent.
  • LiCoO 2 that is a positive electrode active material
  • PVDF polyvinylidene fluoride
  • acetylene black that is a conductive auxiliary agent.
  • a plate-like positive electrode member formed by applying a positive electrode mixture on the surface of a current collector made of aluminum foil and drying to form a positive electrode active material layer on the surface of the current collector is used. Yes.
  • the part which the surface of the aluminum foil exposed is provided in the edge part of the aluminum foil as a collector, without apply
  • the negative electrode member (negative electrode layer) 12 for example, a negative electrode mixture containing a graphite-based material as a negative electrode active material and polyvinylidene fluoride (PVDF) as a binder is used as a current collector made of copper foil.
  • the part which the surface of copper foil exposed is provided in the edge part of copper foil as an electrical power collector, without apply
  • a non-aqueous electrolyte is used as the electrolyte 14, and in the first embodiment, a non-aqueous electrolyte prepared by dissolving a supporting salt in a non-aqueous solvent is used.
  • a non-aqueous electrolyte LiPF 6 is mixed with a non-aqueous solvent in which propylene carbonate, ethylene carbonate, and diethyl carbonate are mixed at a volume ratio of 5:25:70, and a concentration of 1.0 mol / L. What was melt
  • the non-aqueous solvent and the supporting salt are not limited to these, and materials used for conventional batteries can be used without limitation.
  • the electrolyte may be a gel or solid electrolyte.
  • the outer packaging material 20 is formed from, for example, a laminate sheet (laminated sheet) obtained by laminating and integrating an outer protective layer made of resin, an intermediate gas barrier layer made of aluminum, and an inner adhesive layer made of resin.
  • a laminate sheet laminate sheet obtained by laminating and integrating an outer protective layer made of resin, an intermediate gas barrier layer made of aluminum, and an inner adhesive layer made of resin.
  • an aluminum can or the like can be used as the outer packaging material.
  • the bag-shaped separator 13 the sheet-like material which consists of a microporous polypropylene film or a polyethylene film was processed into the shape which opened one end side by the bag shape. A separator is used.
  • a planar shape is substantially square, A structure in which the two corner portions 11a and 11b that are located on the back side, that is, in the vicinity of the bottom portion as viewed from the opening 13x of the bag-shaped separator 13 when being accommodated in the bag-shaped separator 13 are rounded. Is used.
  • the two corners 11a and 11b are rounded, for example, the direction in which the shrinkage rate of the bag separator 13 is the largest is the direction of the width W of the bag separator 13 in FIG.
  • the radius of curvature of 1/100 to 1/10 of the width W of the bag-like separator 13 80 mm in this embodiment 1 ( That is, it is preferable to have a roundness having 0.8 to 8 mm).
  • the corner portions 11a and 11b are rounded as described above to eliminate a portion having an angle of 90 ° or less.
  • a plurality of obtuse angle portions are formed in the corner portion. By doing so, the part which has an angle of 90 degrees or less can also be eliminated.
  • the stress to the corresponding portion of the bag-like separator 13 can be dispersed as compared with the case of having one right angle. However, since stress concentrates at an obtuse angle, it is preferable to provide roundness in terms of efficiently distributing the stress.
  • At least the ridge line portion formed by the surfaces along the thickness direction of the corner portions 11a and 11b rounded as described above and the main surfaces of the positive electrode member 11 is chamfered.
  • this positive electrode member 11 is accommodated in the bag-like separator 13 with the corners 11a and 11b that are rounded and chamfered at the ridge line portions, and is rounded and chamfered. The ends opposite to the direction in which the broken corner portions 11a and 11b are located are exposed from the bag-like separator 13 so that the current collecting member 15 can be connected.
  • the positive electrode member 11 in which the corner portions 11a and 11b are rounded and chamfered is accommodated in the bag-shaped separator 13.
  • the positive electrode member 11 and the negative electrode member 12 are alternately stacked with the negative electrode member 12 that is not housed in the bag-shaped separator and that is not subjected to the process of rounding the corner portion.
  • a laminated body (electrode structure) 10 having a structure laminated via a separator (bag-like separator) 13 is formed (see FIG. 2).
  • the corner portions 11a and 11b of the positive electrode member 11 accommodated in the bag-like separator 13 are rounded, and the corner portion 11a. 11b is chamfered so that the positive electrode member 11 is prevented from breaking through the corner portion of the bag-like separator 13 even when a thermal shrinkage occurs in the bag-like separator 13. And reliability can be improved.
  • FIGS. 5A and 5B are diagrams schematically showing the state after the occurrence, and FIGS. 5A and 5B show the case of Embodiment 1 in which the corner portions 11a and 11b of the positive electrode member 11 are rounded and chamfered. It is a figure which shows typically the state before heat contraction in the bag-shaped separator 13 and the state after it has occurred.
  • the case where the positive electrode member 11 is accommodated in the bag-shaped separator 13 has been described as an example. However, the same applies to the case where the negative electrode member 12 is accommodated in the bag-shaped separator 13. An effect can be obtained.
  • FIG. 6 is a plan view showing the electricity storage device 100 according to Embodiment 2 of the present invention.
  • Fig.7 (a) is a top view which shows the positive electrode member of the state accommodated in the bag-shaped separator which comprises the electrical storage device of Embodiment 2
  • (b) is accommodated in a bag-shaped separator
  • It is a top view which shows the negative electrode member used by laminating
  • 6 and 7A and 7B the same reference numerals as those in FIGS. 1 to 5 denote the same or corresponding parts.
  • the positive electrode terminal 16a and the negative electrode terminal 16b are both positioned on one side of the outer packaging material 20 (upper side in FIG. 6). Has been.
  • This power storage device 100 is a laminated body (electrode structure) in which the positive electrode member 11 accommodated in the bag-shaped separator 13 and the negative electrode member 12 not accommodated in the bag-shaped separator are alternately laminated so as to face each other. ) Together with the electrolytic solution in the outer packaging material 20.
  • the lower side and both side sides in FIG. 7 are closed, and the upper side is also a pair of corner portions 13c, 13d at both ends.
  • a region other than the opening portion 30 ie, a region between the opening portion 30 and the corner portions 13c and 13d
  • a predetermined position a position slightly shifted to the corner portion 13c side from the center of the upper side
  • the positive electrode member 11 a positive electrode member formed by applying the positive electrode mixture 27 to the entire surface of the region excluding the protruding portion 26a of the current collector 26 is used.
  • the protrusion part 26a is a part which functions as a connection part for connecting to the positive electrode terminal 16a, and the part to which the positive electrode mixture 27 is applied other than the protrusion part 26a is accommodated in the bag-shaped separator 13.
  • corner parts 11a, 11b, 11c, and 11d accommodated in the bag-shaped separator 13 of this positive electrode member 11 are made into the shape where all are round. Furthermore, the ridgeline part which the surface along the thickness direction of both the four corner parts 11a, 11b, 11c, and 11d rounded as mentioned above and the both main surfaces make is chamfered.
  • the negative electrode member 12 a negative electrode member formed by applying a negative electrode mixture 28 to the entire surface of the region excluding the protruding portion 26b of the current collector 26 is used.
  • the protruding portion 26b is configured to function as a connecting portion for connecting to the negative electrode terminal 16b.
  • the negative electrode member 12 is used without being housed in a bag-shaped separator. Therefore, the negative electrode member 12 is not subjected to a process of rounding the corner portion or a process of chamfering.
  • the positive electrode member 11 configured as described above and accommodated in the bag-shaped separator 13 is laminated so that the negative electrode member 12 and the protrusions 26a and 26b do not face each other, and the plurality of protrusions 26a are connected to the outer packaging material 20.
  • the power storage device 100 By connecting to the positive electrode terminal 16a disposed on the upper side and connecting the plurality of protruding portions 26b to the negative electrode terminal 16b disposed on the upper side of the outer packaging material 20, the power storage device 100 as shown in FIG. Is obtained.
  • the positive electrode member 11 is accommodated in the bag-shaped separator 13 configured as described above, and all of the four corner portions 11a, 11b, 11c, and 11d of the positive electrode member 11 are included. Even when the bag-shaped separator 13 is in a state where heat shrinkage occurs because the corners 11a, 11b, 11c, and 11d are chamfered and the corners 11a, 11b, 11c, and 11d are chamfered. It becomes possible to reliably prevent the member 11 from breaking through the corner portions 13a, 13b, 13c, and 13d of the bag-like separator 13, and the reliability can be improved.
  • the corner portions 11a, 11b, 11c, and 11d of the positive electrode member 11 are rounded to eliminate a portion having an angle of 90 ° or less. It is also possible to disperse the stress to the corresponding part of the bag-like separator 13 by forming a plurality of obtuse angle parts in the corner parts 11a, 11b, 11c, 11d and eliminating the part having an angle of 90 ° or less. is there. However, since stress concentrates at an obtuse angle, it is preferable to provide roundness in terms of efficiently distributing the stress.
  • the battery (lithium ion secondary battery) has been described as an example of the power storage device.
  • the present invention is not limited to the battery, and is also applicable to a lithium ion capacitor, an electric double layer capacitor, and the like. Is possible.
  • an aluminum foil is used as a positive electrode current collector layer, and an electrode in which a mixture layer containing activated carbon is provided on the aluminum foil as a positive electrode active material layer is a positive electrode member
  • the negative electrode current collector layer for example, a copper foil is used, and an electrode provided with a mixture layer containing graphite as a negative electrode active material layer on the copper foil is used as a negative electrode layer, and lithium ions are further pre-doped into the negative electrode layer.
  • an aluminum foil is used as a positive electrode current collector layer, and a mixture layer containing a carbon material, such as activated carbon, is provided on the aluminum foil as a positive electrode active material layer.
  • the electrode is used as the positive electrode layer.
  • the negative electrode current collector layer for example, an aluminum foil is used, and an electrode in which a mixture layer containing a carbon material, for example, activated carbon is provided on the aluminum foil is used as the negative electrode layer.
  • An electric double layer capacitor can be produced by using, as an electrolytic solution, 1 mol / L triethylmethylammonium tetrafluoroborate dissolved in propylene carbonate.
  • the present invention is not limited to the above embodiment in other respects, and the specific shape of the positive electrode member and the negative electrode member, the specific shape and constituent materials of the bag-shaped separator, and the separator Various applications and modifications can be made within the scope of the invention with respect to the number of stacked positive electrode members and negative electrode members, the constituent material and shape of the outer packaging material, and the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Cell Separators (AREA)
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Abstract

Le problème à résoudre dans le cadre de la présente invention consiste à proposer un dispositif accumulateur qui présente une construction dans laquelle un élément d'électrode positive et/ou un élément d'électrode négative sont agencés dans un séparateur en forme de sac, un court-circuit par percement du séparateur en forme de sac ne pouvant pas se produire par exposition de l'élément d'électrode positive ou de l'élément d'électrode négative agencé dans ce dernier même lorsque le séparateur en forme de sac est thermorétracté. La solution proposée consiste en un dispositif accumulateur (100) qui présente une construction dans laquelle un élément d'électrode positive (11) et/ou un élément d'électrode négative (12) sont agencés dans un séparateur en forme de sac (13), des parties qui présentent un angle inférieur à 90°, étant éliminées en utilisant des arrondis au niveau des coins (11a, 11b) ou une pluralité de parties à angle obtus de l'élément d'électrode positive et/ou de l'élément d'électrode négative agencés dans le séparateur en forme de sac, qui sont positionnés à proximité d'au moins la partie inférieure du séparateur en forme de sac. De même, la partie périphérique créée par les deux faces principales et une face dans le sens de l'épaisseur de l'élément d'électrode positive et/ou de l'élément d'électrode négative agencés dans le séparateur en forme de sac est arrondie.
PCT/JP2012/071328 2011-08-29 2012-08-23 Dispositif accumulateur WO2013031642A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011185556 2011-08-29
JP2011-185556 2011-08-29

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WO2013031642A1 true WO2013031642A1 (fr) 2013-03-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013161631A (ja) * 2012-02-03 2013-08-19 Toyota Industries Corp 電極収納セパレータ、蓄電装置及び車両
JP2019133891A (ja) * 2018-02-02 2019-08-08 株式会社Ｇｓユアサ 蓄電素子
JP2020513166A (ja) * 2017-04-03 2020-04-30 ナワテクノロジー 電気化学キャパシタの製造方法
JP7585760B2 (ja) 2020-12-15 2024-11-19 株式会社豊田自動織機 蓄電装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0256856A (ja) * 1988-08-20 1990-02-26 Sanyo Electric Co Ltd 電池及びその極板の製造方法
JPH09213377A (ja) * 1996-01-30 1997-08-15 Ricoh Co Ltd 角形電池
JPH10188938A (ja) * 1996-12-20 1998-07-21 Ricoh Co Ltd 電池装置
JP2004303963A (ja) * 2003-03-31 2004-10-28 Nissan Diesel Motor Co Ltd 電気二重層キャパシタおよびその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0256856A (ja) * 1988-08-20 1990-02-26 Sanyo Electric Co Ltd 電池及びその極板の製造方法
JPH09213377A (ja) * 1996-01-30 1997-08-15 Ricoh Co Ltd 角形電池
JPH10188938A (ja) * 1996-12-20 1998-07-21 Ricoh Co Ltd 電池装置
JP2004303963A (ja) * 2003-03-31 2004-10-28 Nissan Diesel Motor Co Ltd 電気二重層キャパシタおよびその製造方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013161631A (ja) * 2012-02-03 2013-08-19 Toyota Industries Corp 電極収納セパレータ、蓄電装置及び車両
JP2020513166A (ja) * 2017-04-03 2020-04-30 ナワテクノロジー 電気化学キャパシタの製造方法
JP2019133891A (ja) * 2018-02-02 2019-08-08 株式会社Ｇｓユアサ 蓄電素子
JP7096994B2 (ja) 2018-02-02 2022-07-07 株式会社Ｇｓユアサ 蓄電素子
JP7585760B2 (ja) 2020-12-15 2024-11-19 株式会社豊田自動織機 蓄電装置

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