JP2007265863A - Manufacturing method of film sheathed battery - Google Patents

Manufacturing method of film sheathed battery Download PDF

Info

Publication number
JP2007265863A
JP2007265863A JP2006090889A JP2006090889A JP2007265863A JP 2007265863 A JP2007265863 A JP 2007265863A JP 2006090889 A JP2006090889 A JP 2006090889A JP 2006090889 A JP2006090889 A JP 2006090889A JP 2007265863 A JP2007265863 A JP 2007265863A
Authority
JP
Japan
Prior art keywords
film
electrode plate
separator
positive electrode
negative electrode
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP2006090889A
Other languages
Japanese (ja)
Other versions
JP5481766B2 (en
Inventor
Kazuaki Uchiumi
和明 内海
Hiroshi Yagata
弘志 屋ケ田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Lamilion Energy Ltd
Original Assignee
NEC Lamilion Energy Ltd
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 NEC Lamilion Energy Ltd filed Critical NEC Lamilion Energy Ltd
Priority to JP2006090889A priority Critical patent/JP5481766B2/en
Publication of JP2007265863A publication Critical patent/JP2007265863A/en
Application granted granted Critical
Publication of JP5481766B2 publication Critical patent/JP5481766B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

Landscapes

  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a film sheathed electric device capable of detecting occurrence of shedding and wrinkle generation of a separator in a laminated layer structure after sealing the laminated structure by a film under reduced pressure. <P>SOLUTION: This includes a process of preparing a positive electrode plate, a negative electrode plate, and the separator which are locally deformed by being applied of a local stress, a process of preparing a laminate film which is locally deformed according to the local deformation of the positive electrode plate, the negative electrode plate, and the separator, a process of obtaining a battery element by sequentially laminating the positive electrode plate, the separator, and the negative electrode plate, a process of sealing the battery element by the laminate film under the reduced pressure, and a process that a calculation processing part 19 judges occurrence of abnormality in the battery element when the local deformation of the surface of the laminate film is detected by light-receiving detectors 26, 27. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明はラミネートフィルムを用いたフィルム外装電池の製造方法に関する。   The present invention relates to a method for producing a film-clad battery using a laminate film.

近年、携帯機器等の電源としての電池は、軽量化、薄型化が強く要求されている。そこで、電池の外装材に関しても、軽量化、薄型化に限界のある従来の金属缶に代わり、さらなる軽量化、薄型化が可能であり、金属缶に比べて自由な形状を採ることが可能な外装材として、金属薄膜フィルム、または金属薄膜と熱融着性樹脂フィルムとを積層したラミネートフィルムを用いたものが使用されるようになった。   In recent years, batteries as power sources for portable devices and the like are strongly required to be light and thin. Therefore, the battery exterior material can be further reduced in weight and thickness in place of conventional metal cans that are limited in weight and thickness, and can have a free shape compared to metal cans. As the exterior material, a metal thin film or a laminate film obtained by laminating a metal thin film and a heat-fusible resin film has been used.

電池の外装材として用いられるラミネートフィルムの代表的な例としては、金属薄膜であるアルミニウム薄膜の片面にヒートシール層である熱融着性樹脂フィルムを積層するとともに、他方の面に保護フィルムを積層した３層ラミネートフィルムが挙げられる。   A typical example of a laminate film used as a battery exterior material is to laminate a heat-sealable resin film as a heat seal layer on one side of an aluminum thin film as a metal thin film and a protective film on the other side. Three-layer laminated film.

外装材にラミネートフィルムを用いたフィルム外装電池においては、正極と負極とをセパレータを介して積層した電池要素を、熱融着性樹脂フィルムを互いに対向させてラミネートフィルムで包囲し、電池要素の周囲でラミネートフィルムを熱融着することによって電池要素を気密封止（以下、単に封止という）している。電池要素の正極および負極をラミネートフィルムの外部へ引き出すために、正極および負極にはそれぞれタブが突出して設けられており、これらタブに、リード端子をラミネートフィルムから突出させて接続している。また、セパレータとしては、ポリオレフィン等の熱可塑性樹脂を用いて形成した多孔性フィルムなどが用いられる。   In a film-clad battery using a laminate film as an exterior material, a battery element in which a positive electrode and a negative electrode are laminated via a separator is surrounded by a laminate film with a heat-fusible resin film facing each other, The battery element is hermetically sealed (hereinafter simply referred to as sealing) by heat-sealing the laminate film. In order to draw out the positive electrode and the negative electrode of the battery element to the outside of the laminate film, tabs are provided to protrude from the positive electrode and the negative electrode, respectively, and lead terminals are protruded from the laminate film and connected to these tabs. Moreover, as a separator, the porous film etc. which were formed using thermoplastic resins, such as polyolefin, are used.

工業製品であるリチウムイオン二次電池は、品質管理の面から良品を選別する必要がある。リチウムイオン電池の製造工程において不良品が生じる原因として、不十分なガス除去や不完全な熱シールが挙げられる（特許文献１、特許文献２参照）。この他、リチウムイオン電池の製造工程において不良品が生じる原因には、以下のようなものがある。リチウムイオン電池では一般に粒子状の電極材料を含む電極合剤を金属箔に薄く塗布した電極が使われるが、電極積層体の内部の層で脱粒が起きる場合がある。また、リチウムイオン電池では１０〜数十ミクロンの厚さの樹脂製セパレータを正極と負極との間に挟み込んで形成されるが、自動機、あるいは作業者により電池要素を製造する際、セパレータを積層する際にセパレータにしわが寄った状態で積層されてしまう場合もある。脱粒やセパレータのしわが発生したものは不良品として除去されなければならない。
特開２００２−２８００７７号公報 特開２００４−０９３２０８号公報 It is necessary to select good products from the viewpoint of quality control for lithium ion secondary batteries, which are industrial products. Insufficient gas removal and incomplete heat sealing can be cited as causes of defective products in the manufacturing process of lithium ion batteries (see Patent Document 1 and Patent Document 2). In addition, there are the following causes of defective products in the manufacturing process of the lithium ion battery. In a lithium ion battery, an electrode in which an electrode mixture containing a particulate electrode material is thinly applied to a metal foil is generally used. However, degranulation may occur in an inner layer of the electrode laminate. In addition, in lithium ion batteries, a resin separator having a thickness of 10 to several tens of microns is sandwiched between a positive electrode and a negative electrode. When manufacturing battery elements by an automatic machine or an operator, the separators are stacked. In some cases, the separators are stacked with wrinkles. Those that have shattered or wrinkled separators must be removed as defective products.
JP 2002-280077 A JP 2004-093208 A

しかしながら、脱粒やセパレータのしわの発生は、積層工程での発生をなくしたとしても電池要素が電解液に浸された積層工程後に発生することもあった。   However, the occurrence of degranulation and wrinkling of the separator may occur after the stacking process in which the battery element is immersed in the electrolytic solution even if the generation in the stacking process is eliminated.

そこで本発明は、積層構造体をフィルムにて減圧封止した後に、積層構造体内における脱粒やセパレータのしわの発生を検出することができるフィルム外装電気デバイスの製造方法を提供することを目的とする。   Then, this invention aims at providing the manufacturing method of the film-clad electrical device which can detect the generation | occurrence | production of the grain fall in a laminated structure, and the wrinkle of a separator, after sealing a laminated structure with a film under reduced pressure. .

上記目的を達成するため本発明のフィルム外装電気デバイスの製造方法は、活物質が塗布された複数の正極板と、複数のセパレータと、活物質が塗布された複数の負極板とが交互に積層されてなる積層構造体と、積層構造体の表面に密着するようにして積層構造体を減圧下にて封止する外装体フィルムとを有するフィルム外装電気デバイスの製造方法において、局部的な応力が印加されることで局部的に変形する正極板、負極板およびセパレータを用意する工程と、正極板、負極板およびセパレータの局部的な変形に応じて局部的に変形する外装体フィルムを用意する工程と、正極板、セパレータ、負極板を順次積層して積層構造体を得る工程と、減圧下にて、積層構造体を外装体フィルムにより封止する工程と、外装体フィルムの表面の局部的な変形が検出されると積層構造体内にて異常が発生していると判断する工程とを含むことを特徴とする。   In order to achieve the above object, a method for manufacturing a film-clad electrical device according to the present invention includes a plurality of positive plates coated with an active material, a plurality of separators, and a plurality of negative plates coated with an active material alternately stacked. In a method for manufacturing a film-clad electrical device, comprising a laminated structure formed and an exterior film that seals the laminated structure under reduced pressure so as to be in close contact with the surface of the laminated structure, local stress is A step of preparing a positive electrode plate, a negative electrode plate, and a separator that are locally deformed by application, and a step of preparing an exterior body film that is locally deformed in response to local deformation of the positive electrode plate, the negative electrode plate, and the separator. A step of sequentially laminating a positive electrode plate, a separator and a negative electrode plate to obtain a laminated structure, a step of sealing the laminated structure with an exterior body film under reduced pressure, and a surface area of the exterior body film Characterized in that it comprises the step of deformation is determined that an abnormality has occurred in the laminated structure to be detected.

上記の通りの本発明のフィルム外装電気デバイスの製造方法は、変形しやすい、例えば極めて薄い正極板、負極板、セパレータおよび外装体フィルムを用い、かつ外装体フィルムを積層構造体に密着させてフィルム外装電気デバイスを製造する。つまり、積層構造体内部にて生じた脱粒やセパレータのしわが発生すると、正極板、負極板およびセパレータに局部的に応力が印加されて変形することとなる。そして、この正極板、負極板およびセパレータの変形が、積層された他の正極板、負極板およびセパレータに次々に応力を印加していき、次々に変形させ、変形は積層構造体の表面にまで及ぶこととなる。さらに、積層構造体の表面に生じた変形は、突起が生じるといったかたちで外装体フィルムをも変形させる。本発明の製造方法は、フィルム外装電気デバイスのこのような特性に着目したものであり、外装体フィルムの表面検査を行うことで積層構造体の内部の異常を検出し、外装体フィルムの表面に局部的な変形が認められたものは不良品として除外することを可能としている。本製造方法は、外装体フィルムで積層構造体を減圧下にて封止した後に積層構造体内の異常を検出することができるため、積層構造体を形成している段階では発生しなかったものの、その後の製造工程で生じた脱粒やセパレータのしわを検出することができる。   The method for producing a film-clad electrical device of the present invention as described above is a film that is easily deformed, for example, using a very thin positive electrode plate, negative electrode plate, separator, and outer package film, and the outer package film is adhered to the laminated structure. Manufactures exterior electrical devices. That is, when the grain breakage or the wrinkle of the separator generated in the laminated structure occurs, the stress is locally applied to the positive electrode plate, the negative electrode plate, and the separator to be deformed. Then, the deformation of the positive electrode plate, the negative electrode plate and the separator successively applies stress to the other laminated positive electrode plate, negative electrode plate and separator, and the deformation is successively applied to the surface of the laminated structure. It will reach. Furthermore, the deformation that occurs on the surface of the laminated structure also deforms the exterior body film in the form of protrusions. The manufacturing method of the present invention pays attention to such characteristics of the film-clad electrical device, detects the internal abnormality of the laminated structure by performing a surface inspection of the packaging film, and the surface of the packaging film. It is possible to exclude products with local deformation as defective products. Since this manufacturing method can detect an abnormality in the laminated structure after sealing the laminated structure with an exterior body film under reduced pressure, although it did not occur at the stage of forming the laminated structure, It is possible to detect degranulation and separator wrinkles that occur in the subsequent manufacturing process.

本発明の製造方法は、照射手段が発した光が外装体フィルムの局部的に変形した箇所に照射されることで生じる光の散乱光を検出手段により検出する工程と、演算処理部が、検出手段で検出された散乱光の量が所定の閾値を超えることで、少なくとも活物質の脱粒およびセパレータのしわのいずれか一方が積層構造体内にて発生していると判断する工程とを含むものであってもよい。   In the manufacturing method of the present invention, the step of detecting the scattered light of the light generated when the light emitted from the irradiation unit is irradiated to the locally deformed portion of the exterior body film by the detection unit, and the arithmetic processing unit detects the light And a step of determining that at least one of the active material degreasing and the separator wrinkle is generated in the laminated structure when the amount of scattered light detected by the means exceeds a predetermined threshold value. There may be.

また、本発明の製造方法は、照射手段が外装体フィルムの主面に対して外装体フィルムの主面の法線方向以外の方向から主面全体に光を照射し、観察判断手段が、光が照射された状態の主面を観察し、該観察の結果に基づき、異常を判断する工程を含むものであってもよい。   Further, in the manufacturing method of the present invention, the irradiation unit irradiates the entire main surface from a direction other than the normal direction of the main surface of the exterior body film with respect to the main surface of the exterior body film. It may include a step of observing the main surface in a state of being irradiated and determining an abnormality based on the result of the observation.

本発明によれば、積層構造体をフィルムにて減圧封止した後に、積層構造体内における脱粒やセパレータのしわの発生を検出することができる。   According to the present invention, after the laminated structure is sealed with a film under reduced pressure, it is possible to detect the occurrence of degranulation and separator wrinkles in the laminated structure.

図１に、本実施形態のフィルム外装電池の一例の分解斜視図を示す。また、図２に本実施形態のフィルム外装電池の一例の側断面図を示す。   FIG. 1 shows an exploded perspective view of an example of the film-clad battery of this embodiment. FIG. 2 shows a side sectional view of an example of the film-clad battery of the present embodiment.

フィルム外装電池１は、複数の正極集電部３ａ、複数のセパレータ７、複数の負極集電部３ｂを交互に積層してなる電池要素２と、電池要素２を電解液とともに収納する、２枚のラミネートフィルム５、６からなる外装体と、正極集電部３ａに接続された正極リード端子４ａと、負極集電部３ｂに接続された負極リード端子４ｂとを有する。   The film-clad battery 1 includes a battery element 2 formed by alternately laminating a plurality of positive electrode current collectors 3a, a plurality of separators 7, and a plurality of negative electrode current collectors 3b, and two sheets containing the battery element 2 together with an electrolyte. Of the laminated films 5 and 6, a positive electrode lead terminal 4a connected to the positive electrode current collector 3a, and a negative electrode lead terminal 4b connected to the negative electrode current collector 3b.

正極板２ａおよび負極板２ｂはそれぞれ、集電体の表面に、活物質、導電剤、結着剤等を含む組成物の層（以下、活物質組成物層）を設けて構成される。   Each of the positive electrode plate 2a and the negative electrode plate 2b is configured by providing a layer of a composition containing an active material, a conductive agent, a binder, and the like (hereinafter referred to as an active material composition layer) on the surface of the current collector.

正極活物質としては、Ｌｉ−Ｍｎ系複合酸化物、Ｌｉ−Ｎｉ系複合酸化物、Ｌｉ−Ｃｏ系複合酸化物などが挙げられる。正極活物質の結着剤としては、ポリテトラフルオロエチレン、ポリフッ化ビニリデン、エチレン−プロピレン−ジエン系ポリマー等を用いることができる。導電剤としては、例えば繊維状黒鉛、鱗片状黒鉛、球状黒鉛などの天然または人造の黒鉛類、導電性カーボンブラックなどを用いることができる。   Examples of the positive electrode active material include Li—Mn composite oxide, Li—Ni composite oxide, and Li—Co composite oxide. As a binder for the positive electrode active material, polytetrafluoroethylene, polyvinylidene fluoride, ethylene-propylene-diene polymer, or the like can be used. As the conductive agent, for example, natural or artificial graphites such as fibrous graphite, flaky graphite, and spherical graphite, conductive carbon black, and the like can be used.

負極活物質としては、球状黒鉛、繊維状のメソフェーズ系黒鉛化炭素などの黒鉛類、アモルファスカーボン、難黒鉛化炭素などを用いることができ、負極活物質の結着剤としては、上記正極活物質の結着剤と同じものを用いることができる。   As the negative electrode active material, graphite such as spherical graphite and fibrous mesophase-based graphitized carbon, amorphous carbon, non-graphitizable carbon, and the like can be used. As the binder of the negative electrode active material, the above positive electrode active material The same binder as can be used.

集電体としては、導電性金属で形成された箔または穴あき箔などを用いることができ、その厚みを５μｍ〜２０μｍ程度とすれば良い。正極側の集電体の材料としては、厚みが１０μｍ〜２０μｍ程度のアルミニウム、ステンレスなどが用いられ、負極側の集電体の材料としては、厚みが５μｍ〜１５μｍ程度の銅、ニッケル、銀、ステンレスなどが用いられる。   As the current collector, a foil or a perforated foil formed of a conductive metal can be used, and the thickness may be about 5 μm to 20 μm. As the material for the current collector on the positive electrode side, aluminum, stainless steel or the like having a thickness of about 10 μm to 20 μm is used, and as the material for the current collector on the negative electrode side, copper, nickel, silver having a thickness of about 5 μm to 15 μm, Stainless steel or the like is used.

セパレータ７としては、例えば、ポリエチレンフィルムからなるセパレータ、ポリプロピレンフィルムからなるセパレータ、ポリプロピレン／ポリエチレン／ポリプロピレンフィルムの３層構造からなるセパレータ等が挙げられる。セパレータ７の厚みは１０μｍ〜３０μｍ程度である。   Examples of the separator 7 include a separator made of a polyethylene film, a separator made of a polypropylene film, and a separator made of a three-layer structure of polypropylene / polyethylene / polypropylene film. The thickness of the separator 7 is about 10 μm to 30 μm.

ラミネートフィルム５、６としては、電解液が漏洩しないように電池要素２を封止できるものであれば、この種のフィルム外装電池に用いられるフィルムを用いることができ、一般的には、金属薄膜層と熱融着性樹脂層とを積層したラミネートフィルムが用いられる。この種のラミネートフィルムとしては、例えば、厚さ１０μｍ〜６０μｍの金属箔に厚さ３μｍ〜２００μｍの熱融着性樹脂を貼りつけたものが使用できる。金属箔、すなわち、金属層の材質としては、Ａｌ、Ｔｉ、Ｔｉ系合金、Ｆｅ、ステンレス、Ｍｇ系合金などが使用できる。熱融着性樹脂、すなわち、熱融着性樹脂層としては、ポリプロピレン、ポリエチレン、これらの酸変成物、ポリフェニレンサルファイド、ポリエチレンテレフタレートなどのポリエステル等、ポリアミド、エチレン−酢酸ビニル共重合体などが使用できる。また、保護層としては、ポリエステル、ナイロン等が好適である。   As the laminate films 5 and 6, as long as the battery element 2 can be sealed so that the electrolytic solution does not leak, a film used for this type of film-clad battery can be used. A laminate film in which a layer and a heat-fusible resin layer are laminated is used. As this type of laminate film, for example, a film obtained by attaching a heat-fusible resin having a thickness of 3 μm to 200 μm to a metal foil having a thickness of 10 μm to 60 μm can be used. As the material of the metal foil, that is, the metal layer, Al, Ti, Ti-based alloy, Fe, stainless steel, Mg-based alloy and the like can be used. As the heat-fusible resin, that is, the heat-fusible resin layer, polypropylene, polyethylene, acid-modified products thereof, polyester such as polyphenylene sulfide, polyethylene terephthalate, polyamide, ethylene-vinyl acetate copolymer, etc. can be used. . Moreover, as a protective layer, polyester, nylon, etc. are suitable.

上述した各部材の厚さについては、例示した範囲を下回ると部材のそれぞれの機能が損なわれるおそれが生じ、上回ると本発明でねらいとしている、積層体内部の異物やしわを表面に浮かび上がらせる効果が得られにくくなる。   About the thickness of each member mentioned above, if it falls below the illustrated range, the respective functions of the member may be impaired, and if it exceeds, the effect aimed at the present invention is to lift up the foreign matter and wrinkles inside the laminate on the surface. Is difficult to obtain.

以上の構成のフィルム外装電池１の製造工程について以下説明する。   The manufacturing process of the film-clad battery 1 having the above configuration will be described below.

まず、電池要素２を作製する。正極板２ａおよび負極板２ｂは、公知の方法に従って製造することができる。例えば、正極板２ａは、正極活物質、結着剤および導電剤を混合加工し、Ｎ−メチルピロリドンなどの有機溶媒に分散させてペーストとし、集電体にこのペーストを塗布、乾燥させた後、加圧して適当な形状に切断して得ることができる。このようにして得られた正極板２ａおよび負極板２ｂと、別途用意したセパレータ７を、正極板２ａ、セパレータ７、負極板２ｂの順で順次積層していく。続いて、正極板２ａ、セパレータ７、負極板２ｂが積層された積層領域から延出している延出部において、正極板の延出同士、および負極板の延出部同士をそれぞれ一括して超音波溶接することで中継部である正極集電部３ａおよび負極集電部３ｂを形成する。これと同時に正極集電部３ａへの正極リード端子４ａの接続、および負極集電部３ｂへの負極リード端子４ｂの接続も超音波溶接によりなされる。以上のようにして電池要素２を得る。   First, the battery element 2 is produced. The positive electrode plate 2a and the negative electrode plate 2b can be manufactured according to a known method. For example, the positive electrode plate 2a is obtained by mixing and processing a positive electrode active material, a binder and a conductive agent, dispersing it in an organic solvent such as N-methylpyrrolidone, applying the paste to a current collector, and drying it. It can be obtained by pressurizing and cutting into an appropriate shape. The positive electrode plate 2a and the negative electrode plate 2b thus obtained and the separately prepared separator 7 are sequentially laminated in the order of the positive electrode plate 2a, the separator 7 and the negative electrode plate 2b. Subsequently, in the extending portion extending from the laminated region where the positive electrode plate 2a, the separator 7, and the negative electrode plate 2b are laminated, the extension of the positive electrode plate and the extending portion of the negative electrode plate are collectively superposed. The positive electrode current collector 3a and the negative electrode current collector 3b, which are relay parts, are formed by sonic welding. At the same time, connection of the positive electrode lead terminal 4a to the positive electrode current collector 3a and connection of the negative electrode lead terminal 4b to the negative electrode current collector 3b are also made by ultrasonic welding. The battery element 2 is obtained as described above.

次に、ラミネートフィルム５、６により電池要素２を封止する。まず、２枚のラミネートフィルム５、６を、熱融着性樹脂層が内側となるように互いに対向させて、電池要素２を挟んで包囲する。その後、ラミネートフィルム５、６の周縁部においてラミネートフィルム５、６を熱融着ヘッド（不図示）によって加圧しつつ加熱し、電池要素２を封止することによって、フィルム外装電池１が製造される。封止に際しては、ラミネートフィルム５、６の３辺を先に熱融着して１辺が開放した袋状としておき、その袋状となったラミネートフィルム５、６の開放している残りの１辺から電解液を注入し、その後、残りの１辺を熱融着する。なお、残りの１辺を熱融着する際は減圧チャンバ内にて行う。減圧下にて電池要素２をラミネートフィルム５、６により封止した後、減圧チャンバ内の圧力を大気圧に戻すことでラミネートフィルム５、６が電池要素２の表面に密着する。   Next, the battery element 2 is sealed with the laminate films 5 and 6. First, the two laminate films 5 and 6 are surrounded with the battery element 2 sandwiched therebetween so that the heat-fusible resin layers face each other. Thereafter, the laminate films 5 and 6 are heated while being pressed by a thermal fusion head (not shown) at the peripheral edge of the laminate films 5 and 6, and the battery element 2 is sealed, whereby the film-clad battery 1 is manufactured. . At the time of sealing, the three sides of the laminate films 5 and 6 are first heat-sealed to form a bag shape in which one side is opened, and the remaining 1 of the laminate films 5 and 6 in the bag shape is opened. The electrolyte is injected from the side, and then the remaining one side is heat-sealed. The remaining one side is heat-sealed in a decompression chamber. After the battery element 2 is sealed with the laminate films 5 and 6 under reduced pressure, the laminate films 5 and 6 are brought into close contact with the surface of the battery element 2 by returning the pressure in the reduced pressure chamber to atmospheric pressure.

次に、電池要素２の内部において不具合が発生していないかどうか検査する。すわなち、電池要素２の積層内部で脱粒（集電体に塗布した活物質が脱落する現象）が生じたり、あるいはセパレータ７にしわが寄ったりするという不具合が生じていないかを、ラミネートフィルム５、６の表面検査により確認する。このような検査を行うのは以下の理由によるものである。   Next, the battery element 2 is inspected for defects. In other words, the laminate film 5 is used to determine whether or not there is a problem that degranulation (a phenomenon in which the active material applied to the current collector is dropped) occurs in the stack of the battery elements 2 or the separator 7 is wrinkled. , 6 Confirm by surface inspection. Such an inspection is performed for the following reason.

正極板２ａあるいは負極板２ｂから活物質組成物層が脱粒してしまうと、脱粒してしまった部分は充放電に寄与しなくなる。また、セパレータ７にしわが寄ってしまうと、正極板２ａと負極板２ｂとの間隔が拡がってしまい、これにより正極板２ａと負極板２ｂとの間における均一性がなくなる。これらはいずれも電池特性および寿命に悪影響を及ぼすことが予測される。よって電池要素２内で脱粒やセパレータにしわが寄ってしまった電池は不良品として除去する必要がある。   If the active material composition layer is degranulated from the positive electrode plate 2a or the negative electrode plate 2b, the degranulated portion does not contribute to charge / discharge. Further, when the separator 7 is wrinkled, the distance between the positive electrode plate 2a and the negative electrode plate 2b is widened, and the uniformity between the positive electrode plate 2a and the negative electrode plate 2b is lost. All of these are expected to adversely affect battery characteristics and lifetime. Therefore, it is necessary to remove a battery that has been crushed or wrinkled on the separator in the battery element 2 as a defective product.

以下に、電池要素２内で発生した脱粒やセパレータのしわといった異常を、ラミネートフィルム５、６の表面を検査することで検出することができる、その原理について説明する。   Below, the principle which can detect abnormality, such as the degranulation and separator wrinkle which generate | occur | produced in the battery element 2, by inspecting the surface of the laminate films 5 and 6 is demonstrated.

本実施形態では、セパレータ７にはポリエチレンあるいはポリプロピレンの多孔質膜、またはこれらの複合膜からなる総厚２０μｍ〜３０μｍのものが用いられており、このセパレータ７上に積層された正極板２ａには厚み１０μｍ〜２０μｍのアルミニウム箔に２０μｍ〜１００μｍの厚さの正極活物質組成物層が両面形成されたものが用いられ、また、負極板２ｂには厚み５μｍ〜１５μｍの銅箔に２０μｍ〜１００μｍの厚さの負極活物質組成物層が両面形成されたものが用いられている。つまり、本実施形態の電池要素２は薄く変形しやすい薄板を積層して形成したものである。   In the present embodiment, the separator 7 is made of a polyethylene or polypropylene porous film or a composite film thereof having a total thickness of 20 μm to 30 μm. The positive electrode plate 2 a stacked on the separator 7 is used as the separator 7. An aluminum foil having a thickness of 20 μm to 100 μm formed on both sides of an aluminum foil having a thickness of 10 μm to 20 μm is used, and the negative electrode plate 2b has a thickness of 20 μm to 100 μm on a copper foil having a thickness of 5 μm to 15 μm. A negative electrode active material composition layer having a thickness formed on both sides is used. That is, the battery element 2 of this embodiment is formed by laminating thin plates that are easily deformed.

このような構造の電池要素２の内部で活物質組成物層が脱粒４０を生じると、図２に示すように、セパレータ７上に脱粒した活物質が溜まり、正極板２ａ、セパレータ７、負極板２ｂに局部的な応力を印加し、局部的に変形を生じさせる。また、セパレータ７にしわ４１が寄ってしまった場合も、図３に示すように、しわ４１の寄った箇所が***し、正極板２ａ、セパレータ７、負極板２ｂに局部的な応力を印加し、局部的に変形を生じさせる。このように、正極板２ａあるいは負極板２ｂは極めて薄く変形しやすいため、脱粒４０あるいはしわ４１が発生してセパレータ７上に***部分が生じると、***部分が積層された正極板２ａ、セパレータ７、負極板２ｂに局部的な応力を印加し、局部的に変形を生じさせる。そして、この正極板２ａ、負極板２ｂおよびセパレータ7の変形が、積層された他の正極板２ａ、負極板２ｂおよびセパレータ７に次々に応力を印加していき、次々に変形させていく。最終的にはこの変形は電池要素２の最上層あるいは最下層の正極板２ａ、負極板２ｂの表面にまで及ぶこととなる。   When the active material composition layer generates degranulation 40 inside the battery element 2 having such a structure, as shown in FIG. 2, the degranulated active material accumulates on the separator 7, and the positive electrode plate 2a, the separator 7, and the negative electrode plate A local stress is applied to 2b to cause local deformation. In addition, even when the wrinkle 41 approaches the separator 7, as shown in FIG. 3, the portion where the wrinkle 41 approaches rises, and a local stress is applied to the positive electrode plate 2a, the separator 7, and the negative electrode plate 2b. , Causing deformation locally. As described above, since the positive electrode plate 2a or the negative electrode plate 2b is extremely thin and easily deformed, when the grain separation 40 or the wrinkle 41 is generated and the raised portion is generated on the separator 7, the positive electrode plate 2a and the separator 7 on which the raised portions are laminated. Then, a local stress is applied to the negative electrode plate 2b to cause local deformation. Then, the deformation of the positive electrode plate 2a, the negative electrode plate 2b, and the separator 7 successively applies stress to the other stacked positive electrode plate 2a, negative electrode plate 2b, and separator 7 and deforms them one after another. Eventually, this deformation extends to the surface of the uppermost layer or the lowermost positive electrode plate 2a or negative electrode plate 2b of the battery element 2.

本実施形態のラミネートフィルム５、６は、正極板２ａおよび負極板２ｂの表面に密着しているが、ラミネートフィルム５、６の厚みは２６０μｍ程度以下であるため、密着させた正極板２ａおよび負極板２ｂの形状がラミネートフィルム５、６の表面に浮き出てくる。すなわち、積層内部で生じた***によって電池要素２の最上層あるいは最下層の正極板２ａ、負極板２ｂにまで及んだ変形箇所がラミネートフィルム５、６の表面に突起５０として浮き出てくる。つまり、本実施形態の製造方法における電池要素２の内部検査は、フィルム外装電池１が極めて薄いことで変形しやすい正極板２ａ、負極板２ｂ、セパレータ７、ラミネートフィルム５、６を積層してなるものであるという特徴を活かし、ラミネートフィルム５、６の表面に浮き出た突起５０、場合によっては窪みを検出することで、電池要素２の積層内部における脱粒４０やセパレータ７のしわ４１の発生といった異常を検出するものである。   Although the laminate films 5 and 6 of the present embodiment are in close contact with the surfaces of the positive electrode plate 2a and the negative electrode plate 2b, the thicknesses of the laminate films 5 and 6 are about 260 μm or less. The shape of the plate 2 b is raised on the surfaces of the laminate films 5 and 6. That is, a deformed portion that extends to the uppermost layer or the lowermost positive electrode plate 2 a or the negative electrode plate 2 b of the battery element 2 due to the bulge generated in the laminated layer emerges as protrusions 50 on the surfaces of the laminate films 5 and 6. That is, the internal inspection of the battery element 2 in the manufacturing method of the present embodiment is made by laminating the positive electrode plate 2a, the negative electrode plate 2b, the separator 7, and the laminate films 5 and 6 that are easily deformed because the film-covered battery 1 is extremely thin. By taking advantage of the characteristic of being a thing, by detecting the protrusion 50 that floats on the surface of the laminate film 5, 6, and in some cases, the depression, abnormalities such as the occurrence of grain separation 40 and wrinkles 41 of the separator 7 inside the stack of the battery elements 2 Is detected.

次に、上述した表面検査を行うための表面検査装置の概略的な構成図を図４に示す。   Next, FIG. 4 shows a schematic configuration diagram of a surface inspection apparatus for performing the surface inspection described above.

本実施形態の表面検査装置は照射光学系１５、検出系１６、駆動機構部１７、走査系１８と、演算処理部１９とを有する。   The surface inspection apparatus according to the present embodiment includes an irradiation optical system 15, a detection system 16, a drive mechanism unit 17, a scanning system 18, and an arithmetic processing unit 19.

照射光学系１５は検査光であるレーザ光線３２を発する光源部１２、光源部１２からのレーザ光線３２をフィルム外装電池１上に向けるミラー等の偏向光学部材２３、２４、レーザ光線３２をフィルム外装電池１の表面に集光させるレンズ群２５とを有する。   The irradiation optical system 15 includes a light source unit 12 that emits a laser beam 32 as inspection light, a deflecting optical member 23 and 24 such as a mirror that directs the laser beam 32 from the light source unit 12 onto the film-clad battery 1, and a laser beam 32 that covers the film And a lens group 25 that focuses light on the surface of the battery 1.

検出系１６はフィルム外装電池１の表面に照射されるレーザ光線３２の光軸に交差する検出光軸を有する受光検出器２６、２７を具備している。受光検出器２６は、電池表面で反射したレーザ光線３２のうち直接反射した直接反射光を受光する。一方、受光検出器２７は、電池表面で反射した際に生じた散乱光を受光する。   The detection system 16 includes light receiving detectors 26 and 27 having detection optical axes that intersect the optical axis of the laser beam 32 irradiated on the surface of the film-clad battery 1. The light receiving detector 26 receives the directly reflected light directly reflected from the laser beam 32 reflected from the battery surface. On the other hand, the light receiving detector 27 receives scattered light generated when reflected by the battery surface.

駆動機構系１７は、フィルム外装電池１を保持する電池保持部２０と、電池保持部２０を直線的に駆動させる駆動部１０とを有する。   The drive mechanism system 17 includes a battery holding unit 20 that holds the film-clad battery 1 and a drive unit 10 that drives the battery holding unit 20 linearly.

走査系１８は、駆動機構部１７によるフィルム外装電池１の駆動方向に交差する方向に照射光学系１５を往復走査させる。   The scanning system 18 reciprocally scans the irradiation optical system 15 in a direction crossing the driving direction of the film-clad battery 1 by the driving mechanism unit 17.

演算処理部１９は、検出系１６から送信されてきた信号の処理のほか、照射光学系１５、駆動機構部１７および走査系１８の駆動制御を行う。   The arithmetic processing unit 19 performs drive control of the irradiation optical system 15, the drive mechanism unit 17, and the scanning system 18 in addition to processing of the signal transmitted from the detection system 16.

次に、上記表面検査装置を用いての、本実施形態のフィルム外装電池の製造方法における表面検査工程について説明する。   Next, the surface inspection process in the manufacturing method of the film-clad battery of this embodiment using the said surface inspection apparatus is demonstrated.

減圧封止されたフィルム外装電池１を電池保持部２０に保持させる。次いで、駆動部１０を駆動させて、照射光学系１５により発せられたレーザ光線３２を照射可能な照射領域へと、フィルム外装電池１を搬送する。フィルム外装電池１が照射領域へと搬送されると、駆動部１０はフィルム外装電池１を直線的、かつ所定のピッチでステップ送りする。フィルム外装電池１の搬送方向と直交する方向に往復走査される照射光学系１５から、フィルム外装電池１に対してレーザ光線３２が発せられる。フィルム外装電池１の外装体であるラミネートフィルム５、６に照射されたレーザ光線３２はラミネートフィルム５、６の表面で反射し、検出系１６により受光される。ラミネートフィルム５、６の表面に何ら突起５０がない場合は、ラミネートフィルム５、６の表面で反射したレーザ光線３２は受光検出器２６により受光される。一方、ラミネートフィルム５、６の表面に突起５０が浮き出ている場合は、該突起５０によりレーザ光線３２の一部が散乱光を生じる。つまり、突起５０で反射したレーザ光線３２は、直接反射光が受光検出器２６により検出される他、一部の散乱光が受光検出器２７で受光される。   The film-clad battery 1 sealed under reduced pressure is held by the battery holding unit 20. Next, the driving unit 10 is driven, and the film-clad battery 1 is conveyed to an irradiation region where the laser beam 32 emitted from the irradiation optical system 15 can be irradiated. When the film-clad battery 1 is transported to the irradiation region, the driving unit 10 feeds the film-clad battery 1 linearly and stepwise at a predetermined pitch. A laser beam 32 is emitted to the film-covered battery 1 from the irradiation optical system 15 that is reciprocally scanned in a direction orthogonal to the conveyance direction of the film-covered battery 1. The laser beam 32 applied to the laminate films 5 and 6 that are the exterior bodies of the film-clad battery 1 is reflected by the surfaces of the laminate films 5 and 6 and received by the detection system 16. When there are no protrusions 50 on the surfaces of the laminate films 5 and 6, the laser beam 32 reflected by the surfaces of the laminate films 5 and 6 is received by the light receiving detector 26. On the other hand, when the protrusions 50 are raised on the surfaces of the laminate films 5 and 6, a part of the laser beam 32 is scattered by the protrusions 50. That is, the laser beam 32 reflected by the protrusion 50 is directly reflected by the light receiving detector 26 and part of the scattered light is received by the light receiving detector 27.

演算処理部１９は、受光検出器２７から送信されてきた信号の処理を行い、散乱光の受光量が所定のしきい値を超えるとラミネートフィルム５、６の表面に突起５０が形成されたと判断する。そして、さらに演算処理部１９は、電池要素２内にて脱粒４０、あるいはセパレータ７のしわ４１といった不具合が発生したと判断し、当該フィルム外装電池１を不良品と判断する。   The arithmetic processing unit 19 processes the signal transmitted from the light receiving detector 27, and determines that the protrusion 50 is formed on the surfaces of the laminate films 5 and 6 when the amount of scattered light received exceeds a predetermined threshold value. To do. Further, the arithmetic processing unit 19 determines that a defect such as sag 40 or wrinkles 41 of the separator 7 has occurred in the battery element 2, and determines that the film-covered battery 1 is a defective product.

なお、所定のしきい値を超える散乱光の受光量は、１個の突起５０により生じたものを対象としてもよいし、あるいは複数の突起５０のからの総量を対象とするものであってもよい。すわなち、大きな突起５０が検出された場合に不良品と認定する他、小さな突起５０が複数箇所検出された場合も不良品として認定するものであってもよい。   It should be noted that the amount of scattered light that exceeds a predetermined threshold may be targeted for the one generated by one protrusion 50 or may be the total amount from a plurality of protrusions 50. Good. In other words, when a large protrusion 50 is detected, it is recognized as a defective product, and when a plurality of small protrusions 50 are detected, it may be recognized as a defective product.

また、上記実施形態では、レーザ光線を用いてラミネートフィルム５、６の表面の突起５０を検出する例を示したが、突起の検出方法はこれに限定されるものではない。例えば、突起を検出するための光はレーザ光線以外の光を用いてもよい。この場合、ラミネートフィルム５、６の主面に対して、ラミネートフィルム５、６の主面の法線方向以外の方向から光を照射し、観察判断装置が光が照射された状態の主面の少なくとも一部を観察し、その結果に基づき異常を判断するものであってもよい。   Moreover, although the example which detects the processus | protrusion 50 on the surface of the laminate films 5 and 6 using the laser beam was shown in the said embodiment, the detection method of a processus | protrusion is not limited to this. For example, light other than the laser beam may be used as the light for detecting the protrusion. In this case, the main surface of the laminate films 5 and 6 is irradiated with light from a direction other than the normal direction of the main surfaces of the laminate films 5 and 6, and the observation determination device is irradiated with the light. An abnormality may be determined based on the result of observing at least a part.

ここで、ラミネートフィルム５、６の主面とは、特に電池要素２を収納した部分のラミネートフィルム５、６の表面を指す。また、ラミネートフィルム５、６の主面の法線方向とは、電池要素２を収納した部分のラミネートフィルム５、６の表面における法線を意味する。また、光の照射方向であるラミネートフィルム５、６の主面の法線方向以外の方向とは、主面に対して斜め方向あるいは主面に対して平行な方向を意味するものである。観察判断装置は、光学カメラと、光学カメラによる撮像画像の画像情報を処理する画像情報処理部とを有するものであってもよい。   Here, the main surface of the laminate films 5 and 6 particularly refers to the surface of the laminate films 5 and 6 in the portion in which the battery element 2 is accommodated. In addition, the normal direction of the main surface of the laminate films 5 and 6 means a normal line on the surface of the laminate films 5 and 6 in a portion where the battery element 2 is accommodated. Moreover, directions other than the normal direction of the main surface of the laminate films 5 and 6 which are the light irradiation directions mean a direction oblique to the main surface or a direction parallel to the main surface. The observation determination apparatus may include an optical camera and an image information processing unit that processes image information of an image captured by the optical camera.

突起５０が形成されたラミネートフィルム５、６に上記方向から光を照射すると突起５０による影ができる。光学カメラによりこの影を撮像し、画像情報処理部がラミネートフィルム５、６の平坦な部分よりも暗い部分、すわなち、影を検出する。画像情報処理部は、影を検出するとラミネートフィルム５、６の表面に突起５０が生じている、すわなち、電池要素２の積層内部における脱粒４０やセパレータ７のしわ４１の発生といった異常が発生していると判断する。   When the laminate films 5 and 6 on which the protrusions 50 are formed are irradiated with light from the above direction, a shadow is formed by the protrusions 50. The shadow is picked up by an optical camera, and the image information processing unit detects a darker portion, that is, a shadow, than the flat portions of the laminate films 5 and 6. When the image information processing unit detects a shadow, the projections 50 are formed on the surfaces of the laminate films 5 and 6, that is, abnormalities such as the occurrence of sag 40 in the stack of battery elements 2 and wrinkles 41 in the separator 7 occur. Judge that you are doing.

また、表面観察の方法としては、ラミネートフィルム５、６の主面に縞模様、格子模様などの周期的な模様の光を照射し、その反射光を周期的な模様のスリットを通して観察することによりラミネートフィルム５、６の表面の凹凸を検出する、いわゆるモアレトポグラフィによる方法でもよい。この場合も、光学カメラによる撮像画像の画像情報処理を行って凹凸の有無を判断しても良いし、あるいは目視による判断でもよい。   Further, as a surface observation method, the main surfaces of the laminate films 5 and 6 are irradiated with light having a periodic pattern such as a striped pattern or a lattice pattern, and the reflected light is observed through a slit having a periodic pattern. A so-called moire topography method for detecting irregularities on the surfaces of the laminate films 5 and 6 may also be used. Also in this case, the presence or absence of unevenness may be determined by performing image information processing of the captured image by the optical camera, or may be determined visually.

本発明において、主面に光を照射して表面観察を行う場合、ラミネートフィルムの金属層の外側に向く面はつや消し面であることが好ましい。ラミネートフィルムの金属層によく使われるアルミ箔は、一方の面が光沢面（あるいは鏡面）、他方の面がつや消し面であることが多い。光沢面が外側に向くようにすると、鏡のように周囲の景色が写り込み、表面の突起５０の判別がしにくくなる。一方、つや消し面が外側に向くようにすることで景色の写り込みは防止され、平坦な面ならば均一な散乱光を反射させることができ、突起５０による影を光学カメラや目視によって捉えやすくなる。よって、表面観察の精度を上げるためにも金属層の外側に向く面はつや消し面とするのが好ましい。   In the present invention, when surface observation is performed by irradiating the main surface with light, the surface facing the outside of the metal layer of the laminate film is preferably a matte surface. An aluminum foil often used for a metal layer of a laminate film often has a glossy surface (or mirror surface) on one surface and a matte surface on the other surface. When the glossy surface is directed outward, the surrounding scenery is reflected like a mirror, making it difficult to distinguish the protrusion 50 on the surface. On the other hand, by making the matte surface face outward, the reflection of the scenery is prevented, and if it is a flat surface, uniform scattered light can be reflected, and the shadow by the protrusion 50 can be easily caught by an optical camera or visual observation. . Therefore, the surface facing the outside of the metal layer is preferably a matte surface in order to increase the accuracy of surface observation.

なお、上述のようなレーザ光線以外のを照射して、ラミネートフィルムの表面を検査する場合、主面の全面に対して光を照射し、全面に光が照射された状態の主面を一括して観察するのが好ましい。これによりスループットを向上させることができる。   In addition, when inspecting the surface of the laminate film by irradiating other than the laser beam as described above, the entire main surface is irradiated with light, and the main surface in a state where the entire surface is irradiated with light is collectively collected. It is preferable to observe. Thereby, throughput can be improved.

さらに、突起５０の検出方法としては、光学的な方法以外の方法でもよく、例えば、ラミネートフィルム５、６の表面上をプローブやローラを走査させ、突起上を走査した際のプローブ、ローラの変位量を検出することで突起を検出するものであってもよい。   Further, as a method for detecting the protrusion 50, a method other than an optical method may be used. For example, the probe or roller is scanned on the surface of the laminate films 5 and 6, and the probe or roller is displaced when the protrusion is scanned. The protrusion may be detected by detecting the amount.

本発明のフィルム外装電池の一例の分解斜視図である。It is a disassembled perspective view of an example of the film-clad battery of this invention. 本発明のフィルム外装電池の一例の側断面図である。It is side sectional drawing of an example of the film-clad battery of this invention. 脱粒が発生した状態を示す模式図である。It is a schematic diagram which shows the state which the degranulation generate | occur | produced. セパレータにしわが発生した状態を示す模式図である。It is a schematic diagram which shows the state which the wrinkle generate | occur | produced in the separator. 本発明の表面検査装置の概略的な構成図である。It is a schematic block diagram of the surface inspection apparatus of this invention.

符号の説明Explanation of symbols

１ フィルム外装電池
２ 電池要素
２ａ 正極板
２ｂ 負極板
３ａ 正極集電部
３ｂ 負極集電部
４ａ 正極リード端子
４ｂ 負極リード端子
５、６ ラミネートフィルム
７ セパレータ
１０ 駆動部
１２ 光源部
１５ 照射光学系
１６ 検出系
１７ 駆動機構部
１８ 走査系
１９ 演算処理部
２０ 電池保持部
２３、２４ 偏向光学部材
２５ レンズ群
２６、２７ 受光検出器
３２ レーザ光線
４０ 脱粒
４１ しわ
５０ 突起 DESCRIPTION OF SYMBOLS 1 Film exterior battery 2 Battery element 2a Positive electrode plate 2b Negative electrode plate 3a Positive electrode current collection part 3b Negative electrode current collection part 4a Positive electrode lead terminal 4b Negative electrode lead terminal 5, 6 Laminate film 7 Separator 10 Drive part 12 Light source part 15 Irradiation optical system 16 Detection System 17 Drive mechanism section 18 Scanning system 19 Arithmetic processing section 20 Battery holding section 23, 24 Deflection optical member 25 Lens group 26, 27 Light receiving detector 32 Laser beam 40 Shattering 41 Wrinkle 50 Projection

Claims (3)

活物質が塗布された複数の正極板と、複数のセパレータと、活物質が塗布された複数の負極板とが交互に積層されてなる積層構造体と、前記積層構造体の表面に密着するようにして前記積層構造体を減圧下にて封止する外装体フィルムとを有するフィルム外装電気デバイスの製造方法において、
局部的な応力が印加されることで局部的に変形する前記正極板、前記負極板および前記セパレータを用意する工程と、
前記正極板、前記負極板および前記セパレータの局部的な変形に応じて局部的に変形する前記外装体フィルムを用意する工程と、
前記正極板、前記セパレータ、前記負極板を順次積層して積層構造体を得る工程と、
減圧下にて、前記積層構造体を前記外装体フィルムにより封止する工程と、
前記外装体フィルムの表面の局部的な変形が検出されると前記積層構造体内にて異常が発生していると判断する工程とを含むことを特徴とするフィルム外装電気デバイスの製造方法。 A laminated structure in which a plurality of positive plates coated with an active material, a plurality of separators, and a plurality of negative plates coated with an active material are alternately laminated, and the surface of the laminated structure In the method for producing a film-clad electrical device having an exterior body film that seals the laminated structure under reduced pressure,
Preparing the positive electrode plate, the negative electrode plate and the separator that are locally deformed by applying a local stress;
Preparing the exterior body film that locally deforms in response to local deformation of the positive electrode plate, the negative electrode plate, and the separator;
A step of sequentially laminating the positive electrode plate, the separator, and the negative electrode plate to obtain a laminated structure;
Sealing the laminated structure with the exterior body film under reduced pressure;
And a step of determining that an abnormality has occurred in the laminated structure when a local deformation of the surface of the exterior body film is detected. 照射手段が発した光が前記外装体フィルムの局部的に変形した箇所に照射されることで生じる前記光の散乱光を検出手段により検出する工程と、
演算処理部が、前記検出手段で検出された散乱光の量が所定の閾値を超えることで、少なくとも前記活物質の脱粒および前記セパレータのしわのいずれか一方が前記積層構造体内にて発生していると判断する工程とを含む、請求項１に記載のフィルム外装電気デバイスの製造方法。 A step of detecting the scattered light of the light generated by irradiating the light emitted from the irradiation unit to a locally deformed portion of the exterior body film by the detection unit;
When the amount of scattered light detected by the detection means exceeds a predetermined threshold, the arithmetic processing unit generates at least one of the active material degreasing and the separator wrinkles in the stacked structure. The method of manufacturing a film-covered electrical device according to claim 1, comprising a step of determining that the film is covered. 照射手段が前記外装体フィルムの主面に対して前記外装体フィルムの主面の法線方向以外の方向から前記主面全体に光を照射し、観察判断手段が、光が照射された状態の前記主面を観察し、該観察の結果に基づき、前記異常を判断する工程を含む、請求項１に記載のフィルム外装電気デバイスの製造方法。   The irradiating means irradiates light on the entire main surface from a direction other than the normal direction of the main surface of the outer package film with respect to the main surface of the outer package film, and the observation determining means is in a state where the light is irradiated. The manufacturing method of the film-clad electrical device of Claim 1 including the process of observing the said main surface and judging the said abnormality based on the result of this observation.
JP2006090889A 2006-03-29 2006-03-29 Method for producing film-clad battery Active JP5481766B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006090889A JP5481766B2 (en) 2006-03-29 2006-03-29 Method for producing film-clad battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006090889A JP5481766B2 (en) 2006-03-29 2006-03-29 Method for producing film-clad battery

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2013061940A Division JP2013127989A (en) 2013-03-25 2013-03-25 Film outer package battery

Publications (2)

Publication Number Publication Date
JP2007265863A true JP2007265863A (en) 2007-10-11
JP5481766B2 JP5481766B2 (en) 2014-04-23

Family

ID=38638650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006090889A Active JP5481766B2 (en) 2006-03-29 2006-03-29 Method for producing film-clad battery

Country Status (1)

Country Link
JP (1) JP5481766B2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2390074A1 (en) * 2010-05-26 2011-11-30 General Electric Company In-line inspection methods and closed loop processes for the manufacture of prepregs and/or laminates comprising the same
WO2012090652A1 (en) * 2010-12-28 2012-07-05 オートモーティブエナジーサプライ株式会社 Film covered battery and method for screening same
JP2013127989A (en) * 2013-03-25 2013-06-27 Nec Corp Film outer package battery
JP2014182970A (en) * 2013-03-21 2014-09-29 Automotive Energy Supply Corp Abnormality detection device for battery and abnormality detection method
JP2015065178A (en) * 2014-12-02 2015-04-09 日本電気株式会社 Method for manufacturing film exterior battery
WO2015087631A1 (en) * 2013-12-10 2015-06-18 日産自動車株式会社 Detection method and detection device
TWI490447B (en) * 2011-04-07 2015-07-01 Nissan Motor Fold detection device and crease detection method
JP2016194972A (en) * 2015-03-31 2016-11-17 大日本印刷株式会社 Wound body of packaging material for battery
KR101940449B1 (en) * 2018-04-13 2019-01-18 유광룡 Inspection apparatus using infrared ray lighting
JP2023505981A (en) * 2020-03-09 2023-02-14 エルジー エナジー ソリューション リミテッド Pouch type battery with swelling sensor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57111401A (en) * 1980-12-29 1982-07-10 Toshiba Corp External form inspector
JP2002298833A (en) * 2001-03-30 2002-10-11 Shibaura Mechatronics Corp Secondary battery producing method and liquid injection method
JP2003021604A (en) * 2001-07-06 2003-01-24 Toshiba Corp Defect inspecting method and its device
JP2004093208A (en) * 2002-08-29 2004-03-25 Mitsubishi Chemicals Corp Leakage inspection method for shape variable packaging body and battery inspection and manufacturing method using the inspection method
JP2005093261A (en) * 2003-09-18 2005-04-07 Nec Lamilion Energy Ltd Method for manufacturing battery wrapped with laminated film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57111401A (en) * 1980-12-29 1982-07-10 Toshiba Corp External form inspector
JP2002298833A (en) * 2001-03-30 2002-10-11 Shibaura Mechatronics Corp Secondary battery producing method and liquid injection method
JP2003021604A (en) * 2001-07-06 2003-01-24 Toshiba Corp Defect inspecting method and its device
JP2004093208A (en) * 2002-08-29 2004-03-25 Mitsubishi Chemicals Corp Leakage inspection method for shape variable packaging body and battery inspection and manufacturing method using the inspection method
JP2005093261A (en) * 2003-09-18 2005-04-07 Nec Lamilion Energy Ltd Method for manufacturing battery wrapped with laminated film

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8522614B2 (en) 2010-05-26 2013-09-03 General Electric Company In-line inspection methods and closed loop processes for the manufacture of prepregs and/or laminates comprising the same
CN102294874A (en) * 2010-05-26 2011-12-28 通用电气公司 In-line inspection methods and closed loop processes for the manufacture of prepregs and/or laminates comprising the same
EP2390074A1 (en) * 2010-05-26 2011-11-30 General Electric Company In-line inspection methods and closed loop processes for the manufacture of prepregs and/or laminates comprising the same
KR101719030B1 (en) 2010-12-28 2017-03-22 오토모티브 에너지 서플라이 가부시키가이샤 Film covered battery and method for screening same
JP2012142144A (en) * 2010-12-28 2012-07-26 Automotive Energy Supply Corp Film exterior battery, battery module, module assembly, film exterior battery selecting method and electric automobile
CN103314465A (en) * 2010-12-28 2013-09-18 汽车能源供应公司 Film covered battery and method for screening same
EP2660892A1 (en) * 2010-12-28 2013-11-06 Automotive Energy Supply Corporation Film covered battery and method for screening same
KR20140003428A (en) * 2010-12-28 2014-01-09 오토모티브 에너지 서플라이 가부시키가이샤 Film covered battery and method for screening same
US9837643B2 (en) 2010-12-28 2017-12-05 Automotive Energy Supply Corporation Film covered battery and method for screening same
WO2012090652A1 (en) * 2010-12-28 2012-07-05 オートモーティブエナジーサプライ株式会社 Film covered battery and method for screening same
EP2660892A4 (en) * 2010-12-28 2016-09-07 Automotive Energy Supply Corp Film covered battery and method for screening same
US9243903B2 (en) 2011-04-07 2016-01-26 Nissan Motor Co., Ltd. Wrinkle detection device and wrinkle detection method
TWI490447B (en) * 2011-04-07 2015-07-01 Nissan Motor Fold detection device and crease detection method
JP2014182970A (en) * 2013-03-21 2014-09-29 Automotive Energy Supply Corp Abnormality detection device for battery and abnormality detection method
JP2013127989A (en) * 2013-03-25 2013-06-27 Nec Corp Film outer package battery
WO2015087631A1 (en) * 2013-12-10 2015-06-18 日産自動車株式会社 Detection method and detection device
CN105981200A (en) * 2013-12-10 2016-09-28 日产自动车株式会社 Detection method and detection device
JPWO2015087631A1 (en) * 2013-12-10 2017-03-16 日産自動車株式会社 Detection method and detection apparatus
CN105981200B (en) * 2013-12-10 2017-09-26 日产自动车株式会社 Detection method and detection means
US10026999B2 (en) 2013-12-10 2018-07-17 Nissan Motor Co., Ltd. Detection method and detection device
JP2015065178A (en) * 2014-12-02 2015-04-09 日本電気株式会社 Method for manufacturing film exterior battery
JP2016194972A (en) * 2015-03-31 2016-11-17 大日本印刷株式会社 Wound body of packaging material for battery
KR101940449B1 (en) * 2018-04-13 2019-01-18 유광룡 Inspection apparatus using infrared ray lighting
JP2023505981A (en) * 2020-03-09 2023-02-14 エルジー エナジー ソリューション リミテッド Pouch type battery with swelling sensor
JP7427092B2 (en) 2020-03-09 2024-02-02 エルジー エナジー ソリューション リミテッド Pouch type battery with swelling sensor

Also Published As

Publication number Publication date
JP5481766B2 (en) 2014-04-23

Similar Documents

Publication Publication Date Title
JP5481766B2 (en) Method for producing film-clad battery
JP2013127989A (en) Film outer package battery
CN108475756B (en) Method for manufacturing electrode body and method for manufacturing nonaqueous electrolyte secondary battery
CN113300050B (en) Inspection system for battery electrodes
TWI660536B (en) Method for detecting the positional deviation of electrode plate in an electrode stacked body and device therefor
KR101676407B1 (en) Test method for thermal pad and method of fabricating battery module using the same
JP6459850B2 (en) Short-circuit inspection apparatus and short-circuit inspection method
JP2008243439A (en) Abnormality detecting device of battery and abnormality detecting method of battery
JP2015065178A (en) Method for manufacturing film exterior battery
KR20120096621A (en) Methode and device for inspection of intensity of ultrasonic welding
US11835468B2 (en) Device and method for inspecting air void at lead film of battery
JP2004022206A (en) Battery inspection device
KR20210119787A (en) The Apparatus And The Method For Manufacturing Unit Cell
KR102443461B1 (en) Method for inspecting all-solid cell quality using thermal imaging inspection
KR20220033865A (en) How to inspect the welding quality of electrode tap-lead welds
JP2015170402A (en) Inspection method of tab lead and inspection apparatus of tab lead
JP2006179424A (en) Manufacturing method of battery
KR102425230B1 (en) Welding condition inspection method for secondary battery
JP4386705B2 (en) Pinhole detection method and pinhole detection device
US10921294B2 (en) System for non-destructively inspecting and determining sealing of aluminum pouch by using ultrasonic waves
KR20230108775A (en) Vision Inspection System for Efficiently Inspecting Ultrasonic Welding Status of Secondary Battery Using Stereo Camera
JP2010096548A (en) Device for inspecting nonaqueous electrolyte secondary battery
KR20170093377A (en) Device for Welding Electrode Tabs Comprising Vision Inspection Part
JP2009043469A (en) Manufacturing method of battery, and inspection method of battery
CN114690048A (en) Inspection device and manufacturing method for thin film battery

Legal Events

Date Code Title Description
A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20070906

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090212

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120202

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120508

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120705

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130122

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130325

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20130827

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20131127

A911 Transfer to examiner for re-examination before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20131206

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20140121

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20140203

R150 Certificate of patent or registration of utility model

Ref document number: 5481766

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150