WO2021079601A1 - Corps d'isolation thermique et batterie secondaire l'utilisant - Google Patents

Corps d'isolation thermique et batterie secondaire l'utilisant Download PDF

Info

Publication number
WO2021079601A1
WO2021079601A1 PCT/JP2020/031376 JP2020031376W WO2021079601A1 WO 2021079601 A1 WO2021079601 A1 WO 2021079601A1 JP 2020031376 W JP2020031376 W JP 2020031376W WO 2021079601 A1 WO2021079601 A1 WO 2021079601A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat insulating
sheet
foam sheet
insulating body
face
Prior art date
Application number
PCT/JP2020/031376
Other languages
English (en)
Japanese (ja)
Inventor
佐藤　千尋
臼井　良輔
坤先 曹
Original Assignee
パナソニックＩｐマネジメント株式会社
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 パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2021554100A priority Critical patent/JPWO2021079601A1/ja
Publication of WO2021079601A1 publication Critical patent/WO2021079601A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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

Definitions

  • This disclosure relates to a heat insulating body used as a heat insulating measure and a secondary battery using the heat insulating body.
  • Patent Document 1 As the prior art document information related to the present application, for example, Patent Document 1 is known.
  • the invention according to the present disclosure has the following configuration in order to solve the above problem. That is, it is a heat insulating body provided with a foam sheet made of a thermoplastic resin, a heat insulating sheet provided inside the foam sheet, and a heat-sealing portion.
  • the foam sheet has a first end face, a second end face facing the first end face, an upper surface arranged between the first end face and the second end face, and a second from the first end face. It is provided with a notch provided along the upper surface toward the end face of the.
  • the heat insulating sheet has a fiber sheet and silica xerogel, and the fiber sheet is impregnated with silica gel and inserted into the notch.
  • the heat-sealing portion seals the heat insulating sheet by heat-sealing the first end face of the foam sheet.
  • the foam sheet is compressed when the battery cells expand and absorbs the expansion. Therefore, the heat insulating sheet is hardly compressed, and the heat insulating property can be maintained, so that the influence on other battery cells can be prevented.
  • Sectional drawing of the heat insulating body in one Embodiment of this disclosure Top view of the heat insulating body according to the embodiment of the present disclosure. Partial sectional view of the secondary battery according to the embodiment of the present disclosure.
  • the flowchart which shows the manufacturing method of the heat insulating body of one Embodiment of this disclosure.
  • FIG. 1 is a cross-sectional view of the heat insulating body 13 according to the embodiment of the present disclosure
  • FIG. 2 is a top view of the same.
  • FIG. 1 is a cross-sectional view of the heat insulating body 13 shown in FIG. 2 when the heat insulating body 13 is cut along a plane including line II and perpendicular to the upper surface of the heat insulating body 13.
  • an XYZ Cartesian coordinate system is defined with the horizontal direction as the X-axis, the vertical direction as the Y-axis, and the thickness direction as the Z-axis.
  • the upper surface of the heat insulating body 13 is a surface directed in the positive direction of the Z axis
  • the lower surface of the heat insulating body 13 is a surface directed in the negative direction of the Z axis.
  • the upper surface of the foam sheet 11 and the upper surface and the lower surface of the heat insulating sheet 12 are also defined in the same manner.
  • the heat insulating body 13 has a rectangular shape when viewed from above.
  • the heat insulating body 13 is composed of a foam sheet 11 made of a thermoplastic resin and a heat insulating sheet 12 provided inside the foam sheet 11.
  • the foam sheet 11 is formed into a sheet shape by foaming urethane resin.
  • a notch 14 is made from the first end surface 18 of the foam sheet 11 to the second end surface 19 along a plane (XY plane) that passes through substantially the center of the foam sheet 11 and is parallel to the upper surface 20 of the foam sheet 11.
  • the heat insulating sheet 12 is inserted into the notch 14 so that the upper surface 21 of the heat insulating sheet 12 is parallel to the upper surface 20 of the foam sheet 11, and the first end surface 18 forming the notch 14 is heat-sealed.
  • the heat-sealed portion 15 is formed. By doing so, the heat insulating sheet 12 is sealed to form the heat insulating body 13.
  • the width Le1 of the heat-sealed portion 15 is about 5 mm. Further, the portion of the foam sheet 11 in which the heat insulating sheet 12 is not inserted becomes the end portion of the foam sheet 11. With respect to the end portion, the width We1 of the end portion on the left side of FIG. 2 is about 5 mm, and the width of the end portion on the right side of FIG. 2 We2 is about 5 mm. Further, the width Le2 of the end portion on the lower side of FIG. 2 is about 5 mm.
  • the thickness of the heat insulating body 13 including the heat insulating sheet 12 is about 4 mm.
  • the above thickness is the thickness in the non-pressurized state described below.
  • the heat insulating sheet 12 is obtained by impregnating the internal space of a fiber sheet made of glass fiber with silica xerogel, and its thermal conductivity is about 0.04 W / (m ⁇ K). Further, when a pressure of 2 MPa is applied to the heat insulating sheet 12, the compressibility is about 15% and the restoration rate is about 97%. On the other hand, the compressibility of the foam sheet 11 is about 55%, the restoration rate is about 99.5%, and the thermal conductivity is about 0.1 W / (m ⁇ K).
  • the compression rate and the restoration rate are defined as follows. That is, consider a case where an object having a predetermined surface is considered and pressure is applied in a direction perpendicular to the surface of the object.
  • the thickness direction is the direction perpendicular to the surface of the object
  • the thickness of the object in the non-pressurized state (before applying pressure and in the state of atmospheric pressure) is t0
  • the object in the state of being pressurized at a pressure of 2 MPa Let t1 be the thickness of the object, and let t2 be the thickness of the object in the state immediately after the pressure is removed (immediately after the pressure is removed and in the state of atmospheric pressure).
  • "immediately after removing the pressurization” is a short time (a few seconds to 1 minute) until the thickness t2 of the object is measured after the pressure applied to the object is removed and the state is returned to the atmospheric pressure state. It means that.
  • the foam sheet 11 is more easily deformed by pressure than the heat insulating sheet 12, and is easier to restore.
  • the heat insulating body 13 configured in this way is sandwiched between the battery cells and fixed in the housing to form the secondary battery, when the battery cells expand due to heat or deterioration, the foam sheet 11 is distorted and expands. Absorb. This does not affect the heat insulating sheet and can maintain the heat insulating property. Further, when the battery cell expands due to heat, the battery cell tries to return to its original state when the temperature drops, but since the restoration rate of the foam sheet 11 is high, it is possible to prevent the formation of a gap.
  • the compressibility of the foam sheet 11 is 40% or more and 75% or less, and the restoration rate is 95% or more and 99.99% or less. It is desirable that the compressibility of the heat insulating sheet 12 is 1% or more and 20% or less, and the restoration rate is 80% or more and 99% or less. This is because if the compressibility of the foam sheet 11 is smaller than 40%, the reaction force that pushes back the dimensional change of the cell from the heat insulating sheet 12 becomes strong, which may deteriorate the battery performance. Further, if the compressibility of the foam sheet 11 is larger than 75%, the binding force for pressing the cell is weakened.
  • the restoration rate of the foam sheet 11 is smaller than 95%, it becomes difficult to sufficiently follow the dimensional change of the battery cell. It is not realistic to increase the compressibility of the foam sheet 11 to more than 99.99%. Further, when the compressibility of the heat insulating sheet 12 is smaller than 1%, the thermal conductivity becomes large. If the compressibility of the heat insulating sheet 12 is larger than 20%, the restoration rate becomes small. Further, when the restoration rate of the heat insulating sheet 12 becomes smaller than 80%, it becomes impossible to follow the repeated dimensional change of the cell. It is not realistic to make the compressibility of the heat insulating sheet 12 larger than 99%.
  • the thickness Tf of the foam sheet 11 is 0.3 times or more and 30 times or less the thickness Ta of the heat insulating sheet 12. If the thickness Tf of the foam sheet 11 is thinner than 0.3 times the thickness Ta of the heat insulating sheet 12, it is not possible to sufficiently absorb the strain from the outside. Further, when the thickness Tf of the foam sheet 11 is thicker than 30 times the thickness Ta of the heat insulating sheet 12, the foam sheet 11 has better thermal conductivity than the heat insulating sheet 12, so that the heat insulating body having the same thickness This is because the heat insulating property deteriorates when compared with 13.
  • the thickness of the foam sheet 11 means the sum of the thicknesses of the foam sheets 11 arranged on the upper surface and the lower surface of the heat insulating sheet 12.
  • thermoplastic resin capable of foaming such as polyethylene, acrylic, polystyrene, polypropylene, and ethylene vinyl acetate copolyma may be used.
  • the notch 14 is formed from the first end face 18 of the foam sheet 11, but the notch reaching from the first end face 18 to the second end face 19 facing the first end face 18.
  • the first end face 18 and the second end face 19 may be heat-sealed after the heat insulating sheet 12 is inserted. By doing so, it becomes easier to form the notch 14.
  • FIG. 3 is a partial cross-sectional view of the secondary battery according to the embodiment of the present disclosure.
  • This secondary battery is configured by arranging a plurality of battery cells 16 in a housing 17.
  • a heat insulating body 13 is sandwiched between adjacent battery cells 16 and fixed in the housing 17.
  • the secondary battery refers to a rechargeable battery such as a lithium ion battery or a nickel hydrogen battery.
  • the heat insulating body 13 of FIG. 1 is used, and the fused first end face is arranged so as to come to the upper part of the housing 17.
  • the foam sheet 11 By arranging the foam sheet 11 so that the surfaces other than the first end surface face the bottom surface of the housing 17, the silica xerogel can be further prevented from being separated and scattered around.
  • the battery cell 16 and the heat insulating body 13 due to the arrangement of the battery cell 16 and the heat insulating body 13 as described above, when one battery cell 16 becomes hotter than the other battery cells 16 and expands, the foam sheet 11 is compressed and the one battery is concerned. Since the expansion of the cell 16 is absorbed, the heat insulating sheet 12 is hardly compressed, and the heat insulating property can be maintained, it is possible to prevent the influence on other battery cells 16.
  • the foam sheet 11 and the heat insulating sheet 12 are each pressurized at a pressure of 2 MPa, and as soon as the pressure is removed, the thickness becomes the thickness indicated by the above-mentioned predetermined restoration rate. After that, the methods of changing the thicknesses of the foam sheet 11 and the heat insulating sheet 12 can be considered in the following three cases (1) to (3).
  • the secondary battery may be used by ignoring the battery cell 16 which has expanded due to the high temperature.
  • This fiber sheet is made of glass fiber having a thickness of about 1 mm, a size of about 300 mm ⁇ 500 mm, a rectangular shape, a thickness of about 1 mm, and an average fiber thickness of about ⁇ 2 ⁇ m.
  • a silica sol solution is prepared by adding about 6% by weight of ethylene carbonate as a catalyst to about 15% by weight of an aqueous sodium silicate solution (water glass) as this material (adjustment step).
  • the fiber sheet is immersed in this silica sol solution to impregnate the internal space of the fiber sheet with the silica sol solution (impregnation step).
  • the fiber sheet is pressed with the silica sol solution impregnated to make the thickness of the fiber sheet uniform (thickness equalization step).
  • a method of adjusting the thickness of the fiber sheet a method such as a roll press may be used.
  • the gel skeleton is strengthened by curing the fiber sheet with the adjusted thickness sandwiched between the films (curing process).
  • hydrophobize the silica xerogel The fiber sheet impregnated with silica xerogel is immersed in 6N hydrochloric acid for about 30 minutes to react the gel with hydrochloric acid. Then, as the second step of the hydrophobization treatment, the mixture is immersed in a silylation solution consisting of a mixed solution of a silylating agent and an alcohol, and then stored in a constant temperature bath at about 55 ° C. for about 2 hours (hydrophobicization step). At this time, a mixed solution of the silylating agent and alcohol permeates. When the reaction proceeds and trimethylsiloxane bonds begin to form, hydrochloric acid water is discharged to the outside from the fiber sheet containing the gel. After the silylation treatment is completed, the insulation sheet 12 is obtained by drying in a constant temperature bath at about 150 ° C. for about 2 hours (drying step).
  • a foam sheet made of urethane resin having a thickness of about 3 mm is cut to a predetermined size. After that, a notch 14 is formed from one end surface of the foam sheet in the surface direction of the foam sheet.
  • a method of forming the notch 14 a method of forming the notch 14 while moving the micro end mill or the cutting blade in the rear surface direction can be considered.
  • the heat insulating sheet 12 is inserted from one end surface in which the notch 14 is made, and the heat-sealed portion 15 is formed by heat-sealing this surface, and the heat insulating sheet 12 is sealed inside the foam sheet 11. Insulation body 13 can be obtained.
  • the manufacturing method of the heat insulating body 13 shown above is just an example of the optimum manufacturing method, and it is also possible to obtain the heat insulating body 13 according to the present disclosure by applying another manufacturing method.
  • the foam sheet when the battery cell expands, the foam sheet is compressed to absorb the expansion, the heat insulating sheet is hardly compressed, and the heat insulating property can be maintained. It is industrially useful because it can prevent the influence on other battery cells.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Thermal Insulation (AREA)

Abstract

L'objectif de la présente invention est d'obtenir un corps d'isolation thermique qui, même si une cellule de batterie gonfle, peut absorber ledit gonflement tout en maintenant une propriété d'isolation thermique. Ce corps d'isolation thermique (13) comprend : une feuille de mousse (11) qui comprend une résine thermoplastique ; et une feuille d'isolation thermique (12) qui est disposée à l'intérieur de la feuille de mousse (11). La feuille d'isolation thermique (12) est configurée par imprégnation d'une feuille de fibre avec un xérogel de silice. Une fente (14) est disposée dans une direction de surface de la feuille de mousse (11), à partir d'une première surface d'extrémité (18) de la feuille de mousse (11). La feuille d'isolation thermique (12) est insérée dans la fente (14), et le résultat est scellé avec une section d'étanchéité à la chaleur (15) qui est configurée par thermoscellage de la première surface d'extrémité (18).
PCT/JP2020/031376 2019-10-24 2020-08-20 Corps d'isolation thermique et batterie secondaire l'utilisant WO2021079601A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021554100A JPWO2021079601A1 (fr) 2019-10-24 2020-08-20

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019193200 2019-10-24
JP2019-193200 2019-10-24

Publications (1)

Publication Number Publication Date
WO2021079601A1 true WO2021079601A1 (fr) 2021-04-29

Family

ID=75620442

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/031376 WO2021079601A1 (fr) 2019-10-24 2020-08-20 Corps d'isolation thermique et batterie secondaire l'utilisant

Country Status (2)

Country Link
JP (1) JPWO2021079601A1 (fr)
WO (1) WO2021079601A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014237910A (ja) * 2013-06-10 2014-12-18 パナソニック株式会社 繊維シート
JP2018204708A (ja) * 2017-06-06 2018-12-27 パナソニックＩｐマネジメント株式会社 断熱材とそれを用いた発熱ユニット、および、電池ユニット
WO2019155713A1 (fr) * 2018-02-09 2019-08-15 三洋電機株式会社 Dispositif d'alimentation électrique et véhicule électrique et dispositif de stockage d'énergie comportant ledit dispositif d'alimentation électrique
CN209675463U (zh) * 2019-06-04 2019-11-22 王贝尔 气凝胶隔热片
WO2019225060A1 (fr) * 2018-05-24 2019-11-28 パナソニックＩｐマネジメント株式会社 Article moulé thermiquement isolant et son procédé de fabrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014237910A (ja) * 2013-06-10 2014-12-18 パナソニック株式会社 繊維シート
JP2018204708A (ja) * 2017-06-06 2018-12-27 パナソニックＩｐマネジメント株式会社 断熱材とそれを用いた発熱ユニット、および、電池ユニット
WO2019155713A1 (fr) * 2018-02-09 2019-08-15 三洋電機株式会社 Dispositif d'alimentation électrique et véhicule électrique et dispositif de stockage d'énergie comportant ledit dispositif d'alimentation électrique
WO2019225060A1 (fr) * 2018-05-24 2019-11-28 パナソニックＩｐマネジメント株式会社 Article moulé thermiquement isolant et son procédé de fabrication
CN209675463U (zh) * 2019-06-04 2019-11-22 王贝尔 气凝胶隔热片

Also Published As

Publication number Publication date
JPWO2021079601A1 (fr) 2021-04-29

Similar Documents

Publication Publication Date Title
JP5253377B2 (ja) ポーチ型バッテリー
JP2009533834A5 (fr)
KR101623106B1 (ko) 파우치 필름 포밍 장치
WO2021079601A1 (fr) Corps d'isolation thermique et batterie secondaire l'utilisant
JP6858304B2 (ja) 電池モジュール
WO2005081343A1 (fr) Membrane électrolytique en polymère solide et séparateur, tous deux pour pile à combustible
WO2019176216A1 (fr) Feuille d'isolation thermique, corps d'isolation thermique utilisant cette dernière et procédé de production associé
JP2007048616A (ja) 燃料電池セパレータ、セパレータ製造装置及びセパレータ製造方法
KR20190099056A (ko) 중공-코어 롤링식-전극 배터리 셀
JP2012102894A (ja) 断熱箱体、断熱壁
JP2014120317A (ja) 燃料電池用の電解質膜と膜電極接合体、および燃料電池用電解質膜の製造方法
CN101351915A (zh) 超声焊接燃料电池的组合电极组件
JP2008248618A (ja) 断熱遮音材
JP7422293B2 (ja) 断熱シートおよびその製造方法
JP4527844B2 (ja) 電池用電極板の製造方法
JP2007026967A (ja) 袋セパレータ入り電極板の製造方法
JP2016103450A (ja) 電池用極板の製造装置及び電池用極板の製造方法
JP5414751B2 (ja) 冷蔵庫
JP7462134B2 (ja) 断熱シートおよびこれを用いた二次電池
JP2009176428A (ja) 燃料電池用セパレータ
JP7332332B2 (ja) 熱伝達抑制シート及び組電池
JP2020187870A (ja) 電池セル及び組電池
KR102487120B1 (ko) 3면 실링 파우치형 이차전지의 돌출부 성형장치
JP6240542B2 (ja) 真空断熱材の再生方法
EP3843185B1 (fr) Procédé et dispositif de fabrication d'un assemblage membrane - couches actives d'une pile à combustible ou d'un électrolyseur

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20880249

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021554100

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20880249

Country of ref document: EP

Kind code of ref document: A1