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WO2012132186A1 - Battery module and manufacturing method therefor - Google Patents

Battery module and manufacturing method therefor Download PDF

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Publication number
WO2012132186A1
WO2012132186A1 PCT/JP2012/000679 JP2012000679W WO2012132186A1 WO 2012132186 A1 WO2012132186 A1 WO 2012132186A1 JP 2012000679 W JP2012000679 W JP 2012000679W WO 2012132186 A1 WO2012132186 A1 WO 2012132186A1
Authority
WO
WIPO (PCT)
Prior art keywords
holder
unit cell
elastic member
battery module
groove
Prior art date
Application number
PCT/JP2012/000679
Other languages
French (fr)
Japanese (ja)
Inventor
下司　真也
真一 湯淺
永山　雅敏
佑治 大竹
圭亮 内藤
Original Assignee
パナソニック株式会社
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 パナソニック株式会社 filed Critical パナソニック株式会社
Priority to CN201280000382.7A priority Critical patent/CN102844907B/en
Priority to JP2012516430A priority patent/JP5410604B2/en
Publication of WO2012132186A1 publication Critical patent/WO2012132186A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • 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
    • H01M10/0422—Cells or battery with cylindrical casing
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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

  • the present invention relates to a battery module including a plurality of unit cells and a method for manufacturing the same.
  • Battery modules are often used as a power source for mobile objects such as hybrid electric vehicles (HEV).
  • HEV hybrid electric vehicles
  • a battery holding part for holding the end of the unit cell is provided on two or more holding frames constituting the holding plate (battery holder), and the battery holding part absorbs vibration and impact.
  • a vibration shock absorber is disposed. Then, after the unit cell is assembled in the holding frame, the holding frames are coupled to each other, thereby vibrating between the upper end portion of the unit cell and the battery holding unit and between the lower end portion of the unit cell and the battery holding unit.
  • the shock absorbing portion is arranged to improve the vibration resistance of the battery module (see, for example, Patent Document 1).
  • the present invention has been made in view of the above problems, and a main object thereof is to provide a battery module that can easily improve vibration resistance with fewer members and a method for manufacturing the same.
  • the battery module has a configuration in which an elastic member is mounted in a groove on a side surface of the unit cell.
  • a battery module includes a plurality of cylindrical unit cells each having a groove on a side surface, and a holder having a plurality of cylindrical storage units that respectively store the plurality of unit cells.
  • Each of the battery groove portions is provided with an elastic member that comes into contact with the accommodating portion, and the unit cell is fixed to the holder accommodating portion via the elastic member.
  • the unit cell can be fixed to the housing portion of the holder via the elastic member. Since vibration and impact on the unit cell can be reduced, the earthquake resistance can be improved. Furthermore, since no special member is required, it is extremely easy and productivity can be improved.
  • the manufacturing method of the 1st battery module which concerns on this invention prepares the holder which has the several cylindrical storage part which each accommodates the several cylindrical unit cell which each has a groove part in a side surface, and a several unit cell.
  • the elastic member is provided in the groove on the side surface of the unit cell, and the plurality of unit cells are brought into contact with the inner wall of the holder accommodating unit while the elastic member is pressed against the inner wall of the holder.
  • the unit cell can be fixed to the housing portion of the holder via an elastic member.
  • the manufacturing method of the 2nd battery module which concerns on this invention prepares the holder which has the several cylindrical storage part which each accommodates the several cylindrical unit cell which respectively has a groove part in a side surface, and a several unit cell.
  • a step of providing an elastic member in each groove of each of the plurality of unit cells, a step of inserting the plurality of unit cells into the holder of the holder, and pressing the plurality of unit cells in the axial direction in the axial direction of the groove A step of fixing the unit cell to the holder accommodating part by reducing the width so that the elastic member is clamped in the groove and deformed so as to spread outward in the radial direction of the unit cell.
  • the elastic member is provided in the groove portion on the side surface of the unit cell, the plurality of unit cells are inserted into the housing portion of the holder, and the elastic member is clamped in the groove portion. Since the battery cell is deformed so as to spread outward in the radial direction of the battery, the unit cell can be fixed to the holder housing portion via an elastic member. Thereby, since the vibration and impact with respect to a unit cell can be reduced with an elastic member, earthquake resistance can be improved. Furthermore, since no special member is required, it is extremely easy and productivity can be improved. Furthermore, since the elastic member is deformed so as to spread outward in the radial direction of the unit cell after the unit cell is accommodated in the holder, the process of accommodating the unit cell in the holder becomes easier.
  • the unit cell can be easily fixed to the holder housing portion, and vibration and impact on the unit cell can be reduced and a battery module having high earthquake resistance can be obtained.
  • FIG. 1 is a cross-sectional view showing a unit cell of a battery module according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view showing the configuration of the battery module according to the embodiment of the present invention.
  • FIG. 3 is a cross-sectional view showing a battery module according to an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing a unit cell of a battery module according to a modification of the embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing one step of a method for manufacturing a battery module according to a modification of one embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing one step of a method for manufacturing a battery module according to a modification of one embodiment of the present invention.
  • FIG. 1 is a cross-sectional view showing a unit cell of a battery module according to an embodiment of the present invention.
  • the “cylindrical shape” refers to a shape having a hollow portion in the axial direction, and the cross-sectional shape is not particularly limited, and includes, for example, a circle, an ellipse, a quadrangle, and the like. That is, the unit cell 14 may be a prismatic battery or the like in addition to the cylindrical battery.
  • an electrode group 32 configured by winding a positive electrode plate 26 and a negative electrode plate 28 via a separator 30 is housed together with a nonaqueous electrolyte.
  • a non-aqueous electrolyte is used.
  • the present invention is not limited to this.
  • an aqueous electrolyte may be used.
  • the positive electrode plate 26 is connected to a sealing plate 24 that also serves as a positive electrode terminal via a positive electrode lead 34.
  • the negative electrode plate 28 is connected to the bottom of the battery case 20 that also serves as a negative electrode terminal via a negative electrode lead.
  • the sealing plate 24 is formed with an open portion 24a. When abnormal gas is generated in the unit cell 14, the abnormal gas is discharged from the open portion 24a to the outside of the battery case 20.
  • a part of the battery case 20 is curved inward, so that an annular groove 36 is formed on the side surface.
  • An annular elastic member 12 is mounted in the groove portion 36.
  • the annular elastic member 12 for example, an O-ring or the like can be used.
  • the groove part 36 and the elastic member 12 are not limited to said shape,
  • the groove part 36 may be a groove part extended in the circumferential direction instead of cyclic
  • the material of the elastic member 12 is not particularly limited, but is preferably made of resin, such as polystyrene, polypropylene, polyphenylene ether, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, polycarbonate, polyphenylene sulfide, polybutylene terephthalate.
  • resin such as polystyrene, polypropylene, polyphenylene ether, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, polycarbonate, polyphenylene sulfide, polybutylene terephthalate.
  • Ethylene-propylene-diene rubber, nylon, polyoxymethylene, silicone and the like can be used.
  • FIG. 2 is an exploded perspective view showing the configuration of the battery module according to the embodiment of the present invention.
  • the battery module 10 includes a plurality of cylindrical unit cells 14 each having an elastic member 12 mounted on a side surface, and a plurality of cylindrical units that respectively accommodate the plurality of unit cells 14. And a holder 18 having an accommodating portion 16.
  • the plurality of unit cells 14 are respectively accommodated in the accommodating portion 16 of the holder 18, whereby the battery module 10 of the present embodiment is formed.
  • the shape of the accommodating portion 16 can be appropriately determined according to the shape of the unit cell 14 to be accommodated.
  • the cylindrical accommodating portion 16 is used.
  • the shape is not limited to this, and any shape that can accommodate the unit cell 14 is acceptable.
  • the holder 18 shown in FIG. 2 is integrally formed, for example. If it does in this way, since a unit cell is fixed to one member, a manufacturing process can be made easy and durability of a holder can be improved.
  • the holder 18 is made of, for example, aluminum (Al) or an aluminum alloy.
  • the aluminum alloy is not particularly limited as long as it is lightweight and has good thermal conductivity. For example, Al—magnesium (Mg) alloy, Al—Mg—silicon (Si) alloy, Al A zinc (Zn) -Mg alloy, an Al-Zn-Mg-copper (Cu) alloy, or the like can be used. If it does in this way, when abnormality will arise in the unit cell 14 and it will generate
  • FIG. 3 is a cross-sectional view showing a battery module according to an embodiment of the present invention.
  • the accommodating portion 16 of the holder 18 has a diameter larger than the diameter of the unit cell 14 and is an elastic member provided in the groove 36 of the unit cell 14. It has a diameter smaller than 12 outer diameters. Therefore, when the unit cell 14 to which the elastic member 12 is attached is accommodated in the accommodating part 16, a gap is formed between the inner wall of the accommodating part 16 and the unit cell 14, but the elastic member 12 is deformed and formed on the inner wall of the accommodating part 16. Abut. Thereby, the unit cell 14 is fixed to the accommodating portion 16 of the holder 18. In addition, it is preferable that the gap between the accommodating portion 16 and the unit cell 14 is small in order to improve heat dissipation against the heat generated by the unit cell 14.
  • the unit cell 14 is accommodated in the accommodating part 16 with the positive electrode facing upward, but the present invention is not limited thereto, and the unit cell 14 may be accommodated in the accommodating part 16 with the negative electrode facing upward.
  • the unit cell 14 can be easily fixed to the holder 18, and vibration and impact on the unit cell 14 can be achieved. Can be reduced.
  • a plurality of cylindrical unit cells 14 having groove portions 36 on the side surfaces and a holder 18 having a plurality of cylindrical accommodating portions 16 are prepared.
  • the groove 36 is, for example, an annular groove, but is not limited thereto.
  • the holder 18 may be an integrally formed holder made of a material having thermal conductivity such as aluminum.
  • an annular elastic member 12 is provided in each groove portion 36 of the plurality of unit cells 14. At this time, the elastic member 12 protrudes radially outward from the side surface of the unit cell 14.
  • the outer diameter of the unit cell 14 is smaller than the diameter of the accommodating portion 16 of the holder 18, and the outer diameter of the elastic member 12 provided in the groove portion 36 of the unit cell 14 is larger than the diameter of the accommodating portion 16.
  • each unit cell 14 may be accommodated in the accommodating portion 16 with the positive electrode facing upward, or the negative electrode may be facing upward. Since the outer diameter of the elastic member 12 provided in the groove portion 36 of the unit cell 14 is larger than the diameter of the housing portion 16, an elastic stress is generated between the elastic member 12 and the housing portion 16, thereby causing the unit cell 14. Is fixed to the accommodating portion 16 of the holder 18.
  • the unit cell can be easily fixed to the housing portion of the holder, and the vibration and impact on the unit cell can be reduced, so that a battery module having high earthquake resistance can be obtained.
  • FIG. 4 is a cross-sectional view showing a unit cell of a battery module according to a modification of the embodiment of the present invention.
  • FIG. 5 and FIG. 6 are cross-sectional views showing one process of a method for manufacturing a battery module according to a modification of one embodiment of the present invention.
  • a unit cell 14 in which the elastic member 12 is mounted in the groove 36 is prepared.
  • the elastic member 12 is firmly attached to the groove portion 36 as in the unit cell 14 of the embodiment shown in FIG. There is no need to be.
  • the holder 18 is placed on the first mold 38 formed in a flat plate shape. Then, each unit cell 14 in which the elastic member 12 is mounted in the groove portion 36 is accommodated in each accommodation portion 16 of the placed holder 18.
  • the outer diameter of the portion of the unit cell 14 where the elastic member 12 is provided is configured to be smaller than the diameter of the housing portion 16. For this reason, when inserting the unit cell 14 into the accommodating part 16, the elastic member 12 and the accommodating part 16 are few to contact, and the unit cell 14 equipped with the elastic member 12 can be easily accommodated in the accommodating part 16.
  • the height of the upper surface of the unit cell 14 accommodated in the accommodating portion 16 of the holder 18 is configured to be higher than the height of the upper surface of the holder 18.
  • the unit cell 14 is inserted into the accommodating portion 16 with the positive electrode facing upward, and therefore the upper surface of the unit cell 14 is specifically the upper surface of the positive electrode terminal.
  • the unit cell 14 may be inserted into the housing portion 16 with the negative electrode terminal facing upward.
  • the unit cell 14 and the holder 18 accommodating the unit cell 14 are simultaneously pressed in the axial direction of the unit cell 14 by the pressing member 50 constituted by the first mold 38 and the second mold 40.
  • die 40 consists of the flat plate part 42 formed in flat form, and the cylindrical part 44 formed in the lower surface of a flat plate part.
  • the cylindrical part 44 is in contact with the upper surface of the battery case 20 of the unit cell 14 and is designed so that the positive electrode terminal fits into the cavity part between the cylindrical parts 44.
  • the lower surface of the flat plate portion 42 of the second mold 40 is configured to be in contact with the upper surface of the positive electrode terminal of the unit cell 14 and the upper surface of the holder 18.
  • FIG. 6 shows a state where the unit cell 14 is pressed.
  • the unit cell 14 and the holder 18 that accommodates the unit cell 14 are pressed by the pressing member 50, the unit cell 14 is compressed in the axial direction. Specifically, the axial width of the groove portion 36 is reduced, whereby the elastic member 12 provided in the groove portion 36 is deformed so as to be pinched in the groove portion 36 and spread outward in the radial direction of the unit cell 14. .
  • the elastic member 12 comes into contact with the inner wall of the housing portion 16, and the unit cell 14 is fixed to the housing portion 16 of the holder 18 by the elastic member 12.
  • the second mold 40 is configured such that the lower surface of the flat plate portion 42 is in contact with the upper surface of the positive electrode terminal of the unit cell 14 and the upper surface of the holder 18, the first mold 38 and the second mold 40 are arranged.
  • the holder 18 that accommodates the unit cell 14 is pressed at 40, each unit cell 14 that is accommodated in each of the accommodating units 16 even if the depth of the plurality of accommodating units 16 provided in the holder 18 varies.
  • the height of the upper surface of the positive electrode terminal is equal to the height of the upper surface of the holder 18. If it does in this way, a connection defect can be reduced when connecting the positive electrode terminals of the unit cell 14 with a bus bar etc. later.
  • the height of the upper surface of the positive electrode terminal of each unit cell 14 and the height of the upper surface of the holder 18 are made equal by using the pressing member 50 having the above-described configuration.
  • the same effect can be obtained by pressing each unit cell 14 to a predetermined height using, for example, a flat plate-like pressing member so that only the heights of the upper surfaces of the unit cells 14 are equal to each other. .
  • the axial width of the groove portion 36 of the unit cell 14 is reduced and the elastic member 12 is spread outward in the radial direction of the unit cell 14. If the unit cell 14 can be fixed to the accommodating portion 16 of the holder 18 by being deformed as described above, it is not necessary to use the pressing member as described above.
  • the elastic member 12 provided in the groove 36 of the unit cell 14 is deformed to deform the holder 18. And the unit cell 14 can be fixed, and vibration and impact on the unit cell 14 can be reduced, so that a battery module having high earthquake resistance can be obtained. Further, since the diameter of the accommodating portion 16 is larger than the outer diameter of the elastic member 12 before deformation, the unit cell 14 with the elastic member 12 mounted on the accommodating portion 16 can be easily inserted, so that productivity can be improved.
  • the unit cell 14 and the holder 18 are pressed in the axial direction by the pressing member 50, and thus are accommodated in each accommodating portion 16.
  • the height of the upper surface of the positive electrode terminal of the unit cell 14 can be made equal to the height of the upper surface of the holder 18.
  • the battery module according to the present invention can easily fix the unit cell to the holder accommodating portion, reduce vibration and impact on the unit cell, and is useful for a portable electronic device, a mobile communication device, a vehicle power source, or the like. .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

In the battery module according to the present invention, single cells can be easily fixed to the accommodating sections of a holder, and vibrations and impacts to the single cells can be mitigated. The battery module (10) is provided with a plurality of tubular single cells (14) having groove sections on the side surfaces, and a holder (18) having a plurality of tubular accommodating sections (16) housing the plurality of single cells (14). An elastic member (12) is disposed on the groove section of each of the single cells (14) and abuts a respective accommodating section (16), and the single cells (14) are fixed to the accommodating sections (16) of the holder (18) by the elastic members (12).

Description

電池モジュール及びその製造方法Battery module and manufacturing method thereof
　本発明は、複数の素電池を備えた電池モジュール及びその製造方法に関するものである。 The present invention relates to a battery module including a plurality of unit cells and a method for manufacturing the same.
　近年、電子機器の多様化に伴い高容量、高電圧、高出力で且つ安全性が高い電池や複数の素電池を一つの筐体に収めた電池モジュールが求められている。 In recent years, with the diversification of electronic devices, a battery having a high capacity, a high voltage, a high output, and a high safety and a battery module in which a plurality of unit cells are housed in a single casing are required.
　電池モジュールは、ハイブリッド車（hybrid electric vehicle：ＨＥＶ）等の移動体用の電源として使用されることが多い。電池モジュールに含まれる素電池の保持固定が各素電池と接続端子との溶接にのみ依存している場合、その部分に移動体の走行中の強い振動及び衝撃が加わると、接続端子の変形が生じたり、素電池と接続端子との溶接部が外れたりするおそれがある。 Battery modules are often used as a power source for mobile objects such as hybrid electric vehicles (HEV). When the holding and fixing of the unit cells included in the battery module depend only on the welding of each unit cell and the connection terminal, if strong vibration and impact are applied to the part during traveling of the moving body, the connection terminal is deformed. There is a risk that the welded portion between the unit cell and the connection terminal may come off.
　そこで、従来の電池モジュールでは、保持板（電池ホルダ）を構成する２個以上の保持枠に素電池の端部を保持する電池保持部が設けられ、電池保持部には、振動及び衝撃を吸収する振動衝撃吸収部が配置されている。そして、素電池を保持枠に組み込んだ後、前記保持枠同士を結合することにより、素電池の上端部と電池保持部との間、及び素電池の下端部と電池保持部との間に振動衝撃吸収部を配置して、電池モジュールの耐振性を向上させている（例えば、特許文献１を参照。）。 Therefore, in the conventional battery module, a battery holding part for holding the end of the unit cell is provided on two or more holding frames constituting the holding plate (battery holder), and the battery holding part absorbs vibration and impact. A vibration shock absorber is disposed. Then, after the unit cell is assembled in the holding frame, the holding frames are coupled to each other, thereby vibrating between the upper end portion of the unit cell and the battery holding unit and between the lower end portion of the unit cell and the battery holding unit. The shock absorbing portion is arranged to improve the vibration resistance of the battery module (see, for example, Patent Document 1).
特開２０１０－０４０２４３号公報JP 2010-040243 A
　しかしながら、特許文献１に開示された技術では、素電池の上端部と電池保持部との間、及び素電池の下端部と電池保持部との間に振動衝撃吸収部を配置する際に、２個以上の保持枠を結合させる必要がある。このため、多くの部材が必要となり、電池モジュールの小型化を妨げ、製造工程も煩雑となり、生産性が悪化する問題が生じることとなる。 However, in the technique disclosed in Patent Document 1, when the vibration shock absorbing part is disposed between the upper end part of the unit cell and the battery holding part and between the lower end part of the unit cell and the battery holding part, It is necessary to combine more than one holding frame. For this reason, many members are required, and the battery module is prevented from being miniaturized, the manufacturing process is complicated, and the productivity is deteriorated.
　本発明は前記の問題に鑑みてなされたもので、その主な目的は、より少ない部材により容易に耐振性を向上できる電池モジュール及びその製造方法を提供することにある。 The present invention has been made in view of the above problems, and a main object thereof is to provide a battery module that can easily improve vibration resistance with fewer members and a method for manufacturing the same.
　前記の目的を達成するために、本発明は、電池モジュールを、素電池の側面の溝部に弾性部材が装着された構成とする。 In order to achieve the above object, according to the present invention, the battery module has a configuration in which an elastic member is mounted in a groove on a side surface of the unit cell.
　具体的に、本発明に係る電池モジュールは、側面にそれぞれ溝部を有する筒状の複数の素電池と、複数の素電池をそれぞれ収容する複数の筒状の収容部を有するホルダとを備え、素電池の溝部には、それぞれ収容部と当接する弾性部材が設けられ、素電池は、弾性部材を介してホルダの収容部に固定されている。 Specifically, a battery module according to the present invention includes a plurality of cylindrical unit cells each having a groove on a side surface, and a holder having a plurality of cylindrical storage units that respectively store the plurality of unit cells. Each of the battery groove portions is provided with an elastic member that comes into contact with the accommodating portion, and the unit cell is fixed to the holder accommodating portion via the elastic member.
　本発明に係る電池モジュールによると、素電池の側面に溝部が形成され、その溝部に弾性部材が設けられているため、素電池をホルダの収容部に弾性部材を介して固定でき、弾性部材により素電池に対する振動及び衝撃を低減できるため、耐震性を向上できる。さらに、特別な部材を必要としないため、極めて容易であり、生産性を向上することができる。 According to the battery module of the present invention, since the groove portion is formed on the side surface of the unit cell and the elastic member is provided in the groove portion, the unit cell can be fixed to the housing portion of the holder via the elastic member. Since vibration and impact on the unit cell can be reduced, the earthquake resistance can be improved. Furthermore, since no special member is required, it is extremely easy and productivity can be improved.
　本発明に係る第１の電池モジュールの製造方法は、側面にそれぞれ溝部を有する筒状の複数の素電池、及び複数の素電池をそれぞれ収容する複数の筒状の収容部を有するホルダを準備する工程と、複数の素電池のそれぞれの溝部に弾性部材を設ける工程と、複数の素電池を、弾性部材をホルダの収容部の内壁に圧接しながら、収容部に圧入する工程とを備えている。 The manufacturing method of the 1st battery module which concerns on this invention prepares the holder which has the several cylindrical storage part which each accommodates the several cylindrical unit cell which each has a groove part in a side surface, and a several unit cell. A step, a step of providing an elastic member in each groove portion of the plurality of unit cells, and a step of press-fitting the plurality of unit cells into the housing portion while pressing the elastic member against the inner wall of the housing portion of the holder. .
　本発明に係る第１の電池モジュールの製造方法によると、素電池の側面の溝部に弾性部材を設け、複数の素電池を、弾性部材をホルダの収容部の内壁に圧接しながら、収容部に圧入するため、素電池をホルダの収容部に弾性部材を介して固定できる。これにより、弾性部材により素電池に対する振動及び衝撃を低減できるため、電池モジュールの耐震性を向上できる。さらに、特別な部材を必要としないため、極めて容易であり、生産性を向上することができる。 According to the first battery module manufacturing method of the present invention, the elastic member is provided in the groove on the side surface of the unit cell, and the plurality of unit cells are brought into contact with the inner wall of the holder accommodating unit while the elastic member is pressed against the inner wall of the holder. In order to press-fit, the unit cell can be fixed to the housing portion of the holder via an elastic member. Thereby, since the vibration and impact with respect to a unit cell can be reduced with an elastic member, the earthquake resistance of a battery module can be improved. Furthermore, since no special member is required, it is extremely easy and productivity can be improved.
　本発明に係る第２の電池モジュールの製造方法は、側面にそれぞれ溝部を有する筒状の複数の素電池、及び複数の素電池をそれぞれ収容する複数の筒状の収容部を有するホルダを準備する工程と、複数の素電池のそれぞれの溝部に弾性部材を設ける工程と、複数の素電池をホルダの収容部に挿入する工程と、複数の素電池を軸方向に押圧して溝部の軸方向の幅を縮小することにより、弾性部材を溝部内で挟圧して素電池の径方向外側に広がるように変形させて、素電池をホルダの収容部に固定する工程とを備えている。 The manufacturing method of the 2nd battery module which concerns on this invention prepares the holder which has the several cylindrical storage part which each accommodates the several cylindrical unit cell which respectively has a groove part in a side surface, and a several unit cell. A step of providing an elastic member in each groove of each of the plurality of unit cells, a step of inserting the plurality of unit cells into the holder of the holder, and pressing the plurality of unit cells in the axial direction in the axial direction of the groove A step of fixing the unit cell to the holder accommodating part by reducing the width so that the elastic member is clamped in the groove and deformed so as to spread outward in the radial direction of the unit cell.
　本発明に係る第２の電池モジュールの製造方法によると、素電池の側面の溝部に弾性部材を設け、複数の素電池をホルダの収容部に挿入し、弾性部材を溝部内で挟圧して素電池の径方向外側に広がるように変形させるため、素電池をホルダの収容部に弾性部材を介して固定できる。これにより、弾性部材により素電池に対する振動及び衝撃を低減できるため、耐震性を向上できる。さらに、特別な部材を必要としないため、極めて容易であり、生産性を向上することができる。さらに、素電池をホルダに収容した後に、弾性部材を素電池の径方向外側に広がるように変形させるため、素電池をホルダに収容する工程がより容易となる。 According to the second battery module manufacturing method of the present invention, the elastic member is provided in the groove portion on the side surface of the unit cell, the plurality of unit cells are inserted into the housing portion of the holder, and the elastic member is clamped in the groove portion. Since the battery cell is deformed so as to spread outward in the radial direction of the battery, the unit cell can be fixed to the holder housing portion via an elastic member. Thereby, since the vibration and impact with respect to a unit cell can be reduced with an elastic member, earthquake resistance can be improved. Furthermore, since no special member is required, it is extremely easy and productivity can be improved. Furthermore, since the elastic member is deformed so as to spread outward in the radial direction of the unit cell after the unit cell is accommodated in the holder, the process of accommodating the unit cell in the holder becomes easier.
　本発明に係る電池モジュール及びその製造方法によると、容易に素電池をホルダの収容部に固定でき、素電池に対する振動及び衝撃を低減できて耐震性が高い電池モジュールを得ることができる。 According to the battery module and the method for manufacturing the same according to the present invention, the unit cell can be easily fixed to the holder housing portion, and vibration and impact on the unit cell can be reduced and a battery module having high earthquake resistance can be obtained.
図１は本発明の一実施形態に係る電池モジュールの素電池を示す断面図である。FIG. 1 is a cross-sectional view showing a unit cell of a battery module according to an embodiment of the present invention. 図２は本発明の一実施形態に係る電池モジュールの構成を示す分解斜視図である。FIG. 2 is an exploded perspective view showing the configuration of the battery module according to the embodiment of the present invention. 図３は本発明の一実施形態に係る電池モジュールを示す断面図である。FIG. 3 is a cross-sectional view showing a battery module according to an embodiment of the present invention. 図４は本発明の一実施形態の変形例に係る電池モジュールの素電池を示す断面図である。FIG. 4 is a cross-sectional view showing a unit cell of a battery module according to a modification of the embodiment of the present invention. 図５は本発明の一実施形態の変形例に係る電池モジュールの製造方法の一工程を示す断面図である。FIG. 5 is a cross-sectional view showing one step of a method for manufacturing a battery module according to a modification of one embodiment of the present invention. 図６は本発明の一実施形態の変形例に係る電池モジュールの製造方法の一工程を示す断面図である。FIG. 6 is a cross-sectional view showing one step of a method for manufacturing a battery module according to a modification of one embodiment of the present invention.
　以下、本発明の実施形態を図面に基づいて詳細に説明する。なお、本発明は、以下の実施形態に限定されるものではない。また、本発明の効果を奏する範囲を逸脱しない範囲で、適宜変更は可能である。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment. Moreover, it can change suitably in the range which does not deviate from the range which has the effect of this invention.
　まず、本発明の一実施形態に係る電池モジュールに用いられる素電池について図１を参照しながら説明する。図１は、本発明の一実施形態に係る電池モジュールの素電池を示す断面図である。 First, a unit cell used in a battery module according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view showing a unit cell of a battery module according to an embodiment of the present invention.
　図１に示すように、素電池１４は、筒状の電池ケース２０の開口部がガスケット２２を介して封口板２４で封止されている。なお、本実施形態において、「筒状」とは、軸方向に中空部を備えた形状をいい、その断面形状は特に限定されず、例えば円形、楕円形及び四角形等を含む。すなわち、素電池１４は円筒形電池の他に角形電池等であっても構わない。 As shown in FIG. 1, in the unit cell 14, an opening of a cylindrical battery case 20 is sealed with a sealing plate 24 through a gasket 22. In the present embodiment, the “cylindrical shape” refers to a shape having a hollow portion in the axial direction, and the cross-sectional shape is not particularly limited, and includes, for example, a circle, an ellipse, a quadrangle, and the like. That is, the unit cell 14 may be a prismatic battery or the like in addition to the cylindrical battery.
　電池ケース２０内には、正極板２６と負極板２８とがセパレータ３０を介して捲回されて構成された電極群３２が、非水電解質と共に収容されている。ここでは、非水電解質を用いているが、これに限られず、例えば水溶液系の電解質等を用いても構わない。正極板２６は、正極リード３４を介して正極端子を兼ねる封口板２４に接続されている。また、負極板２８は、負極リードを介して、負極端子を兼ねる電池ケース２０の底部に接続されている。なお、封口板２４には、開放部２４ａが形成されおり、素電池１４に異常ガスが発生したとき、異常ガスが、開放部２４ａから電池ケース２０外へ排出される。 In the battery case 20, an electrode group 32 configured by winding a positive electrode plate 26 and a negative electrode plate 28 via a separator 30 is housed together with a nonaqueous electrolyte. Here, a non-aqueous electrolyte is used. However, the present invention is not limited to this. For example, an aqueous electrolyte may be used. The positive electrode plate 26 is connected to a sealing plate 24 that also serves as a positive electrode terminal via a positive electrode lead 34. The negative electrode plate 28 is connected to the bottom of the battery case 20 that also serves as a negative electrode terminal via a negative electrode lead. The sealing plate 24 is formed with an open portion 24a. When abnormal gas is generated in the unit cell 14, the abnormal gas is discharged from the open portion 24a to the outside of the battery case 20.
　素電池１４は、電池ケース２０の一部が内側に湾曲されていることにより、側面に環状の溝部３６が形成されている。溝部３６には環状の弾性部材１２が装着されている。環状の弾性部材１２には、例えばＯリング等を用いることができる。なお、溝部３６及び弾性部材１２は、上記の形状に限定されず、例えば、溝部３６は環状でなく周方向に延びる溝部であってもよく、弾性部材１２は溝部３６に設けることが可能な形状であればよい。また、弾性部材１２は、その材料は特に制限されないが、好ましくは樹脂からなり、例えば、ポリスチレン、ポリプロピレン、ポリフェニレンエーテル、テトラフルオロエチレン・パーフルオロアルキルビニルエーテル共重合体、ポリカーボネート、ポリフェニレンサルファイド、ポリブチレンテレフタレート、エチレン－プロピレン－ジエンゴム、ナイロン、ポリオキシメチレン及びシリコーン等を用いることができる。 In the unit cell 14, a part of the battery case 20 is curved inward, so that an annular groove 36 is formed on the side surface. An annular elastic member 12 is mounted in the groove portion 36. As the annular elastic member 12, for example, an O-ring or the like can be used. In addition, the groove part 36 and the elastic member 12 are not limited to said shape, For example, the groove part 36 may be a groove part extended in the circumferential direction instead of cyclic | annular form, and the elastic member 12 is a shape which can be provided in the groove part 36. If it is. The material of the elastic member 12 is not particularly limited, but is preferably made of resin, such as polystyrene, polypropylene, polyphenylene ether, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer, polycarbonate, polyphenylene sulfide, polybutylene terephthalate. Ethylene-propylene-diene rubber, nylon, polyoxymethylene, silicone and the like can be used.
　次に、本実施形態に係る電池モジュールの構成について図２を参照しながら説明する。図２は、本発明の一実施形態に係る電池モジュールの構成を示す分解斜視図である。 Next, the configuration of the battery module according to this embodiment will be described with reference to FIG. FIG. 2 is an exploded perspective view showing the configuration of the battery module according to the embodiment of the present invention.
　図２に示すように、本実施形態に係る電池モジュール１０は、側面に弾性部材１２が装着された筒状の複数の素電池１４と、複数の素電池１４がそれぞれ収容される筒状の複数の収容部１６を有するホルダ１８とを備えている。複数の素電池１４がそれぞれホルダ１８の収容部１６に収容されることによって、本実施形態の電池モジュール１０が形成される。ここで、収容部１６の形状は、収容する素電池１４の形状に応じて適宜決定でき、本実施形態では円筒状の素電池１４を用いているため円筒状の収容部１６を用いているが、これに限らず、素電池１４を収容できる形状であればよい。 As shown in FIG. 2, the battery module 10 according to the present embodiment includes a plurality of cylindrical unit cells 14 each having an elastic member 12 mounted on a side surface, and a plurality of cylindrical units that respectively accommodate the plurality of unit cells 14. And a holder 18 having an accommodating portion 16. The plurality of unit cells 14 are respectively accommodated in the accommodating portion 16 of the holder 18, whereby the battery module 10 of the present embodiment is formed. Here, the shape of the accommodating portion 16 can be appropriately determined according to the shape of the unit cell 14 to be accommodated. In the present embodiment, since the cylindrical unit cell 14 is used, the cylindrical accommodating portion 16 is used. However, the shape is not limited to this, and any shape that can accommodate the unit cell 14 is acceptable.
　図２に示すホルダ１８は、例えば一体形成されている。このようにすると、１つの部材に素電池を固定するため、製造工程を容易にでき且つホルダの耐久性を向上できる。また、ホルダ１８は、例えばアルミニウム（Ａｌ）又はアルミニウム合金により形成されている。アルミニウム合金としては、軽量で且つ良好な熱伝導性を有している限り、特に限定されるものではなく、例えばＡｌ－マグネシウム（Ｍｇ）系合金、Ａｌ－Ｍｇ－シリコン（Ｓｉ）系合金、Ａｌ－亜鉛（Ｚｎ）－Ｍｇ系合金、Ａｌ－Ｚｎ－Ｍｇ－銅（Ｃｕ）系合金等を使用することができる。このようにすると、素電池１４に異常が生じて発熱した場合に、その熱を放熱することができ、電池モジュール１０の燃焼等を防ぐことができる。 The holder 18 shown in FIG. 2 is integrally formed, for example. If it does in this way, since a unit cell is fixed to one member, a manufacturing process can be made easy and durability of a holder can be improved. The holder 18 is made of, for example, aluminum (Al) or an aluminum alloy. The aluminum alloy is not particularly limited as long as it is lightweight and has good thermal conductivity. For example, Al—magnesium (Mg) alloy, Al—Mg—silicon (Si) alloy, Al A zinc (Zn) -Mg alloy, an Al-Zn-Mg-copper (Cu) alloy, or the like can be used. If it does in this way, when abnormality will arise in the unit cell 14 and it will generate | occur | produce heat, the heat | fever can be radiated | emitted and the combustion etc. of the battery module 10 can be prevented.
　次に、本発明の一実施形態に係る電池モジュールにおける収容部内における素電池の固定について図３を参照しながら説明する。図３は、本発明の一実施形態に係る電池モジュールを示す断面図である。 Next, fixing of the unit cell in the housing part in the battery module according to the embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view showing a battery module according to an embodiment of the present invention.
　図３に示すように、本実施形態に係る電池モジュール１０において、ホルダ１８の収容部１６は、素電池１４の径よりも大きい径を有し、素電池１４の溝部３６に設けられた弾性部材１２の外径よりも小さい径を有する。従って、弾性部材１２を装着した素電池１４を収容部１６に収容すると、収容部１６の内壁と素電池１４の間には隙間が生じるが、弾性部材１２は変形して収容部１６の内壁に当接する。これにより、素電池１４は、ホルダ１８の収容部１６に固定される。なお、素電池１４の発熱に対して、放熱性を向上するために収容部１６と素電池１４との間の隙間は小さい方が好ましい。 As shown in FIG. 3, in the battery module 10 according to this embodiment, the accommodating portion 16 of the holder 18 has a diameter larger than the diameter of the unit cell 14 and is an elastic member provided in the groove 36 of the unit cell 14. It has a diameter smaller than 12 outer diameters. Therefore, when the unit cell 14 to which the elastic member 12 is attached is accommodated in the accommodating part 16, a gap is formed between the inner wall of the accommodating part 16 and the unit cell 14, but the elastic member 12 is deformed and formed on the inner wall of the accommodating part 16. Abut. Thereby, the unit cell 14 is fixed to the accommodating portion 16 of the holder 18. In addition, it is preferable that the gap between the accommodating portion 16 and the unit cell 14 is small in order to improve heat dissipation against the heat generated by the unit cell 14.
　なお、図３では、正極を上側にして素電池１４が収容部１６に収容されているが、これに限らず、負極を上側にして素電池１４が収容部１６に収容されていてもよい。 In FIG. 3, the unit cell 14 is accommodated in the accommodating part 16 with the positive electrode facing upward, but the present invention is not limited thereto, and the unit cell 14 may be accommodated in the accommodating part 16 with the negative electrode facing upward.
　本発明の一実施形態に係る電池モジュール１０によると、素電池１４の溝部３６に弾性部材１２が形成されているため、容易に素電池１４をホルダ１８に固定できると共に素電池１４に対する振動及び衝撃を低減することが可能となる。 According to the battery module 10 according to the embodiment of the present invention, since the elastic member 12 is formed in the groove portion 36 of the unit cell 14, the unit cell 14 can be easily fixed to the holder 18, and vibration and impact on the unit cell 14 can be achieved. Can be reduced.
　続いて、本発明の一実施形態に係る電池モジュールの製造方法について説明する。 Then, the manufacturing method of the battery module which concerns on one Embodiment of this invention is demonstrated.
　まず、側面に溝部３６を有する筒状の複数の素電池１４と、筒状の複数の収容部１６を有するホルダ１８とを準備する。上記の通り、溝部３６は、例えば環状の溝部であるが、これに限られない。また、ホルダ１８には、例えばアルミニウム等の熱伝導性を有する材料からなり、一体形成されたホルダを用いることができる。 First, a plurality of cylindrical unit cells 14 having groove portions 36 on the side surfaces and a holder 18 having a plurality of cylindrical accommodating portions 16 are prepared. As described above, the groove 36 is, for example, an annular groove, but is not limited thereto. The holder 18 may be an integrally formed holder made of a material having thermal conductivity such as aluminum.
　次に、複数の素電池１４の各溝部３６に、例えば環状である弾性部材１２を設ける。このとき、弾性部材１２は、素電池１４の側面から径方向外側に突出している。ここで、素電池１４の外径は、ホルダ１８の収容部１６の径よりも小さく、素電池１４の溝部３６に設けられた弾性部材１２の外径は、収容部１６の径よりも大きくなるように各部材は形成されている。 Next, for example, an annular elastic member 12 is provided in each groove portion 36 of the plurality of unit cells 14. At this time, the elastic member 12 protrudes radially outward from the side surface of the unit cell 14. Here, the outer diameter of the unit cell 14 is smaller than the diameter of the accommodating portion 16 of the holder 18, and the outer diameter of the elastic member 12 provided in the groove portion 36 of the unit cell 14 is larger than the diameter of the accommodating portion 16. Thus, each member is formed.
　次に、複数の素電池１４を、弾性部材１２をホルダ１８の収容部１６の内壁に圧接しながら、収容部１６に圧入する。なお、上記の通り、正極を上側にして各素電池１４を収容部１６に収容してもよいし、負極を上側にしてもよい。素電池１４の溝部３６に設けられた弾性部材１２の外径は、収容部１６の径よりも大きいため、弾性部材１２と収容部１６との間に弾性応力が生じ、これにより、素電池１４は、ホルダ１８の収容部１６に固定される。 Next, the plurality of unit cells 14 are press-fitted into the housing portion 16 while the elastic member 12 is pressed against the inner wall of the housing portion 16 of the holder 18. As described above, each unit cell 14 may be accommodated in the accommodating portion 16 with the positive electrode facing upward, or the negative electrode may be facing upward. Since the outer diameter of the elastic member 12 provided in the groove portion 36 of the unit cell 14 is larger than the diameter of the housing portion 16, an elastic stress is generated between the elastic member 12 and the housing portion 16, thereby causing the unit cell 14. Is fixed to the accommodating portion 16 of the holder 18.
　本実施形態に係る電池モジュール及びその製造方法によると、容易に素電池をホルダの収容部に固定でき、素電池に対する振動及び衝撃を低減できるため、耐震性が高い電池モジュールを得ることができる。 According to the battery module and the manufacturing method thereof according to the present embodiment, the unit cell can be easily fixed to the housing portion of the holder, and the vibration and impact on the unit cell can be reduced, so that a battery module having high earthquake resistance can be obtained.
　本発明の一実施形態では、素電池１４の溝部３６に設けられた弾性部材１２の外径は、収容部１６の径よりも大きいため、素電池１４を収容部１６に圧入する必要があったが、圧入することなく、素電池１４を収容部１６に挿入できる本発明の一実施形態の変形例について図４～図６を参照しながら説明する。なお、本変形例では、上記の一実施形態と同一の部材には同一の符号を付けて、その説明を省略する。図４は本発明の一実施形態の変形例に係る電池モジュールの素電池を示す断面図である。図５及び図６は、それぞれ本発明の一実施形態の変形例に係る電池モジュールの製造方法の一工程を示す断面図である。 In one embodiment of the present invention, since the outer diameter of the elastic member 12 provided in the groove portion 36 of the unit cell 14 is larger than the diameter of the storage unit 16, it is necessary to press-fit the unit cell 14 into the storage unit 16. However, a modification of the embodiment of the present invention in which the unit cell 14 can be inserted into the housing portion 16 without being press-fitted will be described with reference to FIGS. 4 to 6. In this modification, the same members as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. FIG. 4 is a cross-sectional view showing a unit cell of a battery module according to a modification of the embodiment of the present invention. FIG. 5 and FIG. 6 are cross-sectional views showing one process of a method for manufacturing a battery module according to a modification of one embodiment of the present invention.
　まず、図４に示すように、弾性部材１２が溝部３６に装着された素電池１４を準備する。ここで、本変形例では、上記の通り素電池１４を収容部１６に圧入しないため、図１に示す一実施形態の素電池１４のように、溝部３６に弾性部材１２が堅固に装着されている必要はない。 First, as shown in FIG. 4, a unit cell 14 in which the elastic member 12 is mounted in the groove 36 is prepared. Here, in this modification, since the unit cell 14 is not press-fitted into the housing portion 16 as described above, the elastic member 12 is firmly attached to the groove portion 36 as in the unit cell 14 of the embodiment shown in FIG. There is no need to be.
　次に、図５に示すように、平板状に形成された第１金型３８の上にホルダ１８を載置する。そして、載置されたホルダ１８の各収容部１６に、弾性部材１２が溝部３６に装着された各素電池１４を収容する。ここで、本変形例では、素電池１４の弾性部材１２が設けられた部分の外径は、収容部１６の径よりも小さくなるように構成されている。このため、素電池１４を収容部１６に挿入する際に、弾性部材１２と収容部１６とが接触することは少なく、弾性部材１２を装着した素電池１４を容易に収容部１６に収容できる。なお、この時点でホルダ１８の収容部１６に収容された素電池１４の上面の高さは、ホルダ１８の上面の高さよりも高くなるように構成されている。なお、本変形例では、正極を上側にして素電池１４を収容部１６に挿入しているため、素電池１４の上面は、具体的に正極端子の上面である。但し、上記の通り、負極端子を上側にして、素電池１４を収容部１６に挿入しても構わない。 Next, as shown in FIG. 5, the holder 18 is placed on the first mold 38 formed in a flat plate shape. Then, each unit cell 14 in which the elastic member 12 is mounted in the groove portion 36 is accommodated in each accommodation portion 16 of the placed holder 18. Here, in this modification, the outer diameter of the portion of the unit cell 14 where the elastic member 12 is provided is configured to be smaller than the diameter of the housing portion 16. For this reason, when inserting the unit cell 14 into the accommodating part 16, the elastic member 12 and the accommodating part 16 are few to contact, and the unit cell 14 equipped with the elastic member 12 can be easily accommodated in the accommodating part 16. At this time, the height of the upper surface of the unit cell 14 accommodated in the accommodating portion 16 of the holder 18 is configured to be higher than the height of the upper surface of the holder 18. In the present modification, the unit cell 14 is inserted into the accommodating portion 16 with the positive electrode facing upward, and therefore the upper surface of the unit cell 14 is specifically the upper surface of the positive electrode terminal. However, as described above, the unit cell 14 may be inserted into the housing portion 16 with the negative electrode terminal facing upward.
　そして、素電池１４及びそれを収容したホルダ１８を、第１金型３８と第２金型４０とにより構成される押圧部材５０により素電池１４の軸方向に同時に押圧する。ここで、第２金型４０は平板状に形成された平板部４２と、平板部の下面に形成された円筒部４４とからなる。円筒部４４は素電池１４の電池ケース２０の上面と接し、円筒部４４同士の間の空洞部に正極端子が嵌るように設計されている。また、第２金型４０の平板部４２の下面と、素電池１４の正極端子の上面及びホルダ１８の上面とが接するように構成されている。 Then, the unit cell 14 and the holder 18 accommodating the unit cell 14 are simultaneously pressed in the axial direction of the unit cell 14 by the pressing member 50 constituted by the first mold 38 and the second mold 40. Here, the 2nd metal mold | die 40 consists of the flat plate part 42 formed in flat form, and the cylindrical part 44 formed in the lower surface of a flat plate part. The cylindrical part 44 is in contact with the upper surface of the battery case 20 of the unit cell 14 and is designed so that the positive electrode terminal fits into the cavity part between the cylindrical parts 44. Further, the lower surface of the flat plate portion 42 of the second mold 40 is configured to be in contact with the upper surface of the positive electrode terminal of the unit cell 14 and the upper surface of the holder 18.
　素電池１４を押圧した状態を図６に示す。図６に示すように、素電池１４及びそれを収容したホルダ１８を、押圧部材５０により押圧すると、素電池１４が軸方向に圧縮される。具体的に、溝部３６の軸方向の幅が縮小し、これにより、溝部３６に設けられた弾性部材１２は、溝部３６内で挟圧されて素電池１４の径方向外側に広がるように変形する。その結果、収容部１６の内壁に弾性部材１２が当接し、弾性部材１２により素電池１４がホルダ１８の収容部１６に固定される。 FIG. 6 shows a state where the unit cell 14 is pressed. As shown in FIG. 6, when the unit cell 14 and the holder 18 that accommodates the unit cell 14 are pressed by the pressing member 50, the unit cell 14 is compressed in the axial direction. Specifically, the axial width of the groove portion 36 is reduced, whereby the elastic member 12 provided in the groove portion 36 is deformed so as to be pinched in the groove portion 36 and spread outward in the radial direction of the unit cell 14. . As a result, the elastic member 12 comes into contact with the inner wall of the housing portion 16, and the unit cell 14 is fixed to the housing portion 16 of the holder 18 by the elastic member 12.
　また、第２金型４０は、平板部４２の下面と、素電池１４の正極端子の上面及びホルダ１８の上面とが接するように構成されているため、第１金型３８と第２金型４０とで素電池１４を収容したホルダ１８を押圧すると、ホルダ１８に設けられている複数の収容部１６の深さにばらつきがあったとしても、各収容部１６に収容された各素電池１４の正極端子の上面の高さと、ホルダ１８の上面との高さが同等になる。このようにすると、後に素電池１４の正極端子同士をバスバー等で接続する際に接続不良を低減できる。なお、本変形例では、上記のような構成の押圧部材５０を用いて、各素電池１４の正極端子の上面の高さと、ホルダ１８の上面との高さが同等にしたが、特に、これに限られず、各素電池１４の上面同士の高さのみが同等となるように、例えば平板状の押圧部材を用いて各素電池１４を所定の高さまで押圧しても同様の効果が得られる。また、各素電池１４の上面の高さを同等にする必要がない場合は、素電池１４の溝部３６の軸方向の幅が縮小して、弾性部材１２を素電池１４の径方向外側に広がるように変形させることにより、素電池１４をホルダ１８の収容部１６に固定できれば、上記のような押圧部材を用いる必要はない。 Further, since the second mold 40 is configured such that the lower surface of the flat plate portion 42 is in contact with the upper surface of the positive electrode terminal of the unit cell 14 and the upper surface of the holder 18, the first mold 38 and the second mold 40 are arranged. When the holder 18 that accommodates the unit cell 14 is pressed at 40, each unit cell 14 that is accommodated in each of the accommodating units 16 even if the depth of the plurality of accommodating units 16 provided in the holder 18 varies. The height of the upper surface of the positive electrode terminal is equal to the height of the upper surface of the holder 18. If it does in this way, a connection defect can be reduced when connecting the positive electrode terminals of the unit cell 14 with a bus bar etc. later. In this modification, the height of the upper surface of the positive electrode terminal of each unit cell 14 and the height of the upper surface of the holder 18 are made equal by using the pressing member 50 having the above-described configuration. The same effect can be obtained by pressing each unit cell 14 to a predetermined height using, for example, a flat plate-like pressing member so that only the heights of the upper surfaces of the unit cells 14 are equal to each other. . Further, when it is not necessary to make the height of the upper surface of each unit cell 14 equal, the axial width of the groove portion 36 of the unit cell 14 is reduced and the elastic member 12 is spread outward in the radial direction of the unit cell 14. If the unit cell 14 can be fixed to the accommodating portion 16 of the holder 18 by being deformed as described above, it is not necessary to use the pressing member as described above.
　本発明の一実施形態の変形例に係る電池モジュールの製造方法によると、素電池１４を収容部１６に挿入した後、素電池１４の溝部３６に設けられた弾性部材１２を変形させてホルダ１８と素電池１４とを固定でき、素電池１４に対する振動及び衝撃を低減できるため、耐震性が高い電池モジュールを得ることができる。また、変形前の弾性部材１２の外径よりも収容部１６の径のほうが大きいため、容易に収容部１６に弾性部材１２を装着した素電池１４を挿入できるので生産性を向上できる。さらに、ホルダ１８に設けられている複数の収容部１６の深さにばらつきがあったとしても、押圧部材５０による素電池１４及びホルダ１８を軸方向に押圧するため、各収容部１６に収容された素電池１４の正極端子の上面の高さを、ホルダ１８の上面の高さと同等にすることができる。 According to the method for manufacturing a battery module according to the modified example of the embodiment of the present invention, after inserting the unit cell 14 into the housing part 16, the elastic member 12 provided in the groove 36 of the unit cell 14 is deformed to deform the holder 18. And the unit cell 14 can be fixed, and vibration and impact on the unit cell 14 can be reduced, so that a battery module having high earthquake resistance can be obtained. Further, since the diameter of the accommodating portion 16 is larger than the outer diameter of the elastic member 12 before deformation, the unit cell 14 with the elastic member 12 mounted on the accommodating portion 16 can be easily inserted, so that productivity can be improved. Furthermore, even if there is a variation in the depth of the plurality of accommodating portions 16 provided in the holder 18, the unit cell 14 and the holder 18 are pressed in the axial direction by the pressing member 50, and thus are accommodated in each accommodating portion 16. The height of the upper surface of the positive electrode terminal of the unit cell 14 can be made equal to the height of the upper surface of the holder 18.
　以上、本発明を好適な実施形態により説明してきたが、こうした記述は限定事項ではなく、もちろん、種々の改変が可能である。 As mentioned above, although this invention has been demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible.
　本発明に係る電池モジュールは、容易に素電池をホルダの収容部に固定でき、素電池に対する振動及び衝撃を低減でき、携帯型電子機器、移動体通信機器、又は車両の電源等に有用である。 The battery module according to the present invention can easily fix the unit cell to the holder accommodating portion, reduce vibration and impact on the unit cell, and is useful for a portable electronic device, a mobile communication device, a vehicle power source, or the like. .
１０　電池モジュール
１２　弾性部材
１４　素電池
１６　収容部
１８　ホルダ
３６　溝部
３８　第１金型
４０　第２金型
４２　平板部
４４　円筒部
５０　押圧部材 DESCRIPTION OF SYMBOLS 10 Battery module 12 Elastic member 14 Unit cell 16 Storage part 18 Holder 36 Groove part 38 1st metal mold | die 40 2nd metal mold | die 42 Flat plate part 44 Cylindrical part 50 Pressing member

Claims (9)

  1. 　側面にそれぞれ溝部を有する筒状の複数の素電池と、
    　前記複数の素電池をそれぞれ収容する複数の筒状の収容部を有するホルダとを備え、
    　前記素電池の前記溝部には、それぞれ前記収容部と当接する弾性部材が設けられ、
    　前記素電池は、前記弾性部材を介して前記ホルダの収容部に固定されている電池モジュール。     A plurality of cylindrical unit cells each having a groove on a side surface;
    A holder having a plurality of cylindrical accommodating portions each accommodating the plurality of unit cells,
    Each of the groove portions of the unit cell is provided with an elastic member that comes into contact with the housing portion,
    The unit cell is a battery module fixed to the holder of the holder via the elastic member.
  2. 　前記溝部は、前記素電池の側面に環状に形成され、
    　前記弾性部材は、環状である請求項１に記載の電池モジュール。     The groove is annularly formed on the side surface of the unit cell,
    The battery module according to claim 1, wherein the elastic member is annular.
  3. 　前記ホルダは、一体形成されている請求項１に記載の電池モジュール。 The battery module according to claim 1, wherein the holder is integrally formed.
  4. 　側面にそれぞれ溝部を有する筒状の複数の素電池、及び前記複数の素電池をそれぞれ収容する複数の筒状の収容部を有するホルダを準備する工程と、
    　前記複数の素電池のそれぞれの溝部に弾性部材を設ける工程と、
    　前記複数の素電池を、前記弾性部材を前記ホルダの収容部の内壁に圧接しながら、前記収容部に圧入する工程とを備えている電池モジュールの製造方法。     Preparing a plurality of cylindrical unit cells each having a groove on a side surface, and a holder having a plurality of cylindrical storage units each storing the plurality of unit cells;
    Providing an elastic member in each groove of the plurality of unit cells;
    A step of press-fitting the plurality of unit cells into the housing portion while pressing the elastic member against the inner wall of the housing portion of the holder.
  5. 　側面にそれぞれ溝部を有する筒状の複数の素電池、及び前記複数の素電池をそれぞれ収容する複数の筒状の収容部を有するホルダを準備する工程と、
    　前記複数の素電池のそれぞれの溝部に弾性部材を設ける工程と、
    　前記複数の素電池を前記ホルダの収容部に挿入する工程と、
    　前記複数の素電池を軸方向に押圧して前記溝部の軸方向の幅を縮小することにより、前記弾性部材を前記溝部内で挟圧して前記素電池の径方向外側に広がるように変形させて、前記素電池を前記ホルダの収容部に固定する工程とを備えている電池モジュールの製造方法。     Preparing a plurality of cylindrical unit cells each having a groove on a side surface, and a holder having a plurality of cylindrical storage units each storing the plurality of unit cells;
    Providing an elastic member in each groove of the plurality of unit cells;
    Inserting the plurality of unit cells into the holder accommodating portion;
    By pressing the plurality of unit cells in the axial direction and reducing the axial width of the groove portion, the elastic member is sandwiched in the groove portion and deformed so as to spread outward in the radial direction of the unit cell. And a step of fixing the unit cell to the holder of the holder.
  6. 　前記複数の素電池の押圧を、押圧部材により同時に前記複数の素電池のそれぞれに対して行う請求項５に記載の電池モジュールの製造方法。 The battery module manufacturing method according to claim 5, wherein the plurality of unit cells are pressed against each of the plurality of unit cells simultaneously by a pressing member.
  7. 　前記複数の素電池の押圧を、前記複数の素電池の上面の高さがそれぞれ同等になるように行う請求項６に記載の電池モジュールの製造方法。 The method for manufacturing a battery module according to claim 6, wherein the pressing of the plurality of unit cells is performed such that the heights of the upper surfaces of the plurality of unit cells are equal to each other.
  8. 　前記複数の素電池のそれぞれの溝部に弾性部材を設ける工程では、前記素電池の側面に環状に形成された溝部に環状の弾性部材を設ける請求項４又は５に記載の電池モジュールの製造方法。 The battery module manufacturing method according to claim 4 or 5, wherein in the step of providing an elastic member in each groove of each of the plurality of unit cells, an annular elastic member is provided in a groove formed in an annular shape on a side surface of the unit cell.
  9. 　前記ホルダを準備する工程では、一体形成されているホルダを準備する請求項４又は５に記載の電池モジュールの製造方法。 6. The battery module manufacturing method according to claim 4, wherein in the step of preparing the holder, an integrally formed holder is prepared.
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