JP2011065866A - Container for battery or the like and manufacturing method of the same - Google Patents

Container for battery or the like and manufacturing method of the same Download PDF

Info

Publication number
JP2011065866A
JP2011065866A JP2009215606A JP2009215606A JP2011065866A JP 2011065866 A JP2011065866 A JP 2011065866A JP 2009215606 A JP2009215606 A JP 2009215606A JP 2009215606 A JP2009215606 A JP 2009215606A JP 2011065866 A JP2011065866 A JP 2011065866A
Authority
JP
Japan
Prior art keywords
layer
base material
container
material layer
folded
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.)
Pending
Application number
JP2009215606A
Other languages
Japanese (ja)
Inventor
Naoki Takao
直樹 高尾
Yasunori Senoo
恭憲 妹尾
Masanao Orihara
正直 折原
Masamichi Oyama
正道 大山
Yukio Kasai
幸生 香西
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.)
Okura Industrial Co Ltd
Original Assignee
Okura Industrial Co 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 Okura Industrial Co Ltd filed Critical Okura Industrial Co Ltd
Priority to JP2009215606A priority Critical patent/JP2011065866A/en
Publication of JP2011065866A publication Critical patent/JP2011065866A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for a battery or the like of which the laminate film in the opening is bent outward, in which the bent portion does not return to an original state even if an adhesive tape or the like is not used, and provide a manufacturing method of the same. <P>SOLUTION: In the container 20 for a battery or the like, a laminate film, in which a base material layer 29 including an electrolyte solution non-resistant resin layer, a barrier layer 28, and a sealant layer 27 are laminated in order, is formed in a bag shape with the base material layer at an outer side and the sealant layer at an inner side. The laminate film forms a folded part 21 with the periphery of the opening 23 folded outward, and further, on the folded part, there is formed a cut-out part 24 where the base material layer 29 and the barrier layer 28 are cut off so as to expose the sealant layer 27 to a container body 22 face, and in the cut-out part 24, the folded part 21 is fixed firm with the base material layer 29 on the container body side 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、非耐電解液性樹脂層を含む基材層、バリア層、シーラント層が積層されたラミネートフィルムからなる容器であって、リチウムイオン電池やリチウムポリマー電池等のリチウム二次電池及びキャパシタに用いられる、正極材料や負極材料、電解液等を密封するための絶縁性の容器に関する。尚、本明細書に於いて、リチウムイオン電池やリチウムポリマー電池等のリチウム二次電池、及びキャパシタのことを「電池等」と記す。   The present invention is a container comprising a laminate film in which a base material layer including a non-electrolytic solution-resistant resin layer, a barrier layer, and a sealant layer are laminated, and a lithium secondary battery such as a lithium ion battery or a lithium polymer battery, and a capacitor The present invention relates to an insulating container for sealing a positive electrode material, a negative electrode material, an electrolytic solution, etc. In the present specification, lithium secondary batteries such as lithium ion batteries and lithium polymer batteries, and capacitors are referred to as “batteries”.

近年、電池等用の容器には、複数の層から成るラミネートフィルムを袋状あるいはトレー状に成形したものが用いられている。リチウムイオン電池は、このような容器に正極材料と負極材料とセパレータとを積層したものを入れた後、電解液を充填し、最後に電極端子を内部から開口部を通して外部に延長し、開口部を熱接着により密封して製造する。リチウムポリマー電池は、容器に正極材料と負極材料と電解液を浸潤させたセパレータとを入れた後、電極端子を外部に延長し、開口部を密封して製造する。キャパシタは、アルミニウムの集電板の間に電解液を浸潤した活性炭の電極とセパレータとを挟んだ積層体を容器に入れ、電極端子を外部に延長し、開口部を密封して製造する。
これらの容器は、基材層、バリア層、シーラント層が順次積層されたラミネートフィルムから成形されることが多く、シーラント層にはポリエチレン系やポリプロピレン系の熱接着性樹脂が採用され、バリア層には水分バリア性に優れたアルミニウム箔等の金属箔が採用され、基材層にはナイロンやポリエステル等の機械的強度に優れた樹脂が採用されている。
2. Description of the Related Art In recent years, a container for a battery or the like is used in which a laminate film composed of a plurality of layers is formed into a bag shape or a tray shape. Lithium ion battery is a container in which a positive electrode material, a negative electrode material and a separator are stacked, and then filled with an electrolyte solution. Finally, an electrode terminal is extended from the inside to the outside through the opening, Is manufactured by heat sealing. A lithium polymer battery is manufactured by putting a positive electrode material, a negative electrode material, and a separator infiltrated with an electrolyte into a container, extending electrode terminals to the outside, and sealing an opening. Capacitors are manufactured by putting a laminate in which an activated carbon electrode and a separator infiltrated with an electrolyte between aluminum collector plates are placed in a container, electrode terminals are extended to the outside, and openings are sealed.
These containers are often formed from a laminate film in which a base material layer, a barrier layer, and a sealant layer are sequentially laminated, and a polyethylene-based or polypropylene-based heat-adhesive resin is adopted for the sealant layer. A metal foil such as an aluminum foil having excellent moisture barrier properties is employed, and a resin having excellent mechanical strength such as nylon or polyester is employed for the base material layer.

ところでナイロンは、機械的強度に優れ、尚且つ内容物保護性、容器形状への成形性、バリア層とのラミネート加工性等に優れており、ラミネートフィルムの基材層として非常に適した樹脂である。しかしながらナイロンは、電池やキャパシタの製造に必要不可欠な電解液に対する耐性がなく、電解液が付着すると変色、膨潤し、場合によっては溶解することもあった。
このような問題を解決する為に、例えば特許文献1では、二軸延伸ナイロンフィルム層の外側に二軸延伸ポリエステルフィルム層を設けたラミネートフィルムが開示されている。このような構成をとることにより、フィルムの表面に電解液が付着しても膨潤したり溶解したりすることを防止できる。
By the way, nylon is a resin that is excellent in mechanical strength, has excellent contents protection, moldability to container shape, and laminate processability with a barrier layer. is there. However, nylon has no resistance to the electrolyte solution essential for the production of batteries and capacitors, and when the electrolyte solution adheres, it discolors, swells, and sometimes dissolves.
In order to solve such a problem, for example, Patent Document 1 discloses a laminate film in which a biaxially stretched polyester film layer is provided outside a biaxially stretched nylon film layer. By adopting such a configuration, it is possible to prevent swelling or dissolution even when the electrolytic solution adheres to the surface of the film.

しかしながら特許文献1に開示されているラミネートフィルムであっても、フィルム端面にはナイロンが露出しているため、内容物を挿入する際に該端面に電解液が付着すると、ナイロンが変色、膨潤するという問題を有している。そこで本発明者らは、このような問題を解決しうるリチウム二次電池又はキャパシタ用容器を発明し、先に特許出願を行った(特願2009−117290号)。この先願発明の容器は、開口部においてラミネートフィルムが外向きに折り返されているので、開口部周辺にラミネートフィルム端面が露出しておらず、内容物挿入時に電解液がフィルム端面に付着し難い。
尚、折り返された部分(以下、折り返し部)は、単に折り返されただけでは元の状態(折り返されていない状態)に戻る恐れがあるので、容器本体側の基材層に貼着されることが望ましい。しかしながら基材同士は熱融着性に乏しいため、先願発明では粘着テープを用いて折り返し部を容器本体側の基材層に貼着する技術も同時に提案した。しかしながら粘着テープ等の別部材を用いることは、容器のコストアップに繋がるので、別部材を用いることなく、折り返し部が元の状態に戻ることを防止できる方法が求められていた。
However, even in the laminated film disclosed in Patent Document 1, since nylon is exposed on the film end face, when the electrolyte is attached to the end face when the contents are inserted, the nylon discolors and swells. Has the problem. Accordingly, the inventors have invented a lithium secondary battery or capacitor container that can solve such problems, and filed a patent application first (Japanese Patent Application No. 2009-117290). In the container of the prior invention, since the laminate film is folded outward at the opening, the end face of the laminate film is not exposed around the opening, and the electrolyte hardly adheres to the end face of the film when the contents are inserted.
Note that the folded portion (hereinafter referred to as the folded portion) may be returned to the original state (the unfolded state) simply by being folded, so that it is adhered to the base material layer on the container body side. Is desirable. However, since the base materials are poor in heat-fusibility, the prior invention also proposed a technique for sticking the folded portion to the base material layer on the container body side using an adhesive tape. However, since the use of another member such as an adhesive tape leads to an increase in the cost of the container, there has been a demand for a method that can prevent the folded portion from returning to its original state without using another member.

特開2002−56824号公報JP 2002-56824 A

本発明が解決しようとする課題は、開口部においてラミネートフィルムが外向きに折り返された電池等用容器において、粘着テープ等を用いなくても、折り返し部が元の状態に戻ることのない容器を提供することである。
また該容器を製造するためのラミネートフィルムの提供も課題とする。
更に、該容器の製造方法の提供も同時に課題とする。
The problem to be solved by the present invention is a container for a battery or the like in which the laminate film is folded outward at the opening, and the container in which the folded portion does not return to the original state without using an adhesive tape or the like. Is to provide.
Another object of the present invention is to provide a laminate film for producing the container.
Furthermore, the provision of a method for manufacturing the container is also an issue.

本発明によると、上記課題を解決するための手段として、
非耐電解液性樹脂層を含む基材層、バリア層、シーラント層が順次積層されたラミネートフィルムを、基材層を外側、シーラント層を内側にして袋状に成形した電池等用容器において、前記ラミネートフィルムが開口部周辺で外向きに折り返されて折り返し部を形成し、更に該折り返し部に、シーラント層が容器本体面に露出するように基材層およびバリア層が切り取られた欠損部が形成されており、該欠損部において、前記折り返し部が容器本体側の基材層に固着されていることを特徴とする電池等用容器を提供する。
また前記容器が折り返し辺に対して垂直な方向のヒートシール部を有しており、該ヒートシール部と折り返し部との交点に前記欠損部が形成されていることを特徴とする前記電池等用容器を提供する。
また基材層、バリア層、シーラント層が順次積層されたラミネートフィルムであって、シーラント層がフィルム両面に露出するように、基材層及びバリア層が切り取られた欠損部を有することを特徴とする前記電池等用容器の製造に用いられるラミネートフィルムが提供される。
また基材層、バリア層、シーラント層をそれぞれ別々にフィルム状に成形した後、基材層およびバリア層に欠損部を設け、次いでバリア層の欠損部と基材層の欠損部とが少なくとも一部で重なるように、基材層、バリア層、シーラント層を積層してラミネートフィルムを製造し、該ラミネートフィルムの前記欠損部を含む側辺を、シーラント層が外側となるように折り返して折り返し部を成形し、更に欠損部において折り返し部を容器本体側の基材層に固着させ、最後に折り返し辺が開口部となるようにラミネートフィルムを袋状に成形することを特徴とする前記電池等用容器の製造方法が提供される。
また基材層、バリア層、シーラント層をそれぞれ別々にフィルム状に成形した後、基材層およびバリア層に欠損部を設け、次いでバリア層の欠損部と基材層の欠損部とが少なくとも一部で重なるように、基材層、バリア層、シーラント層を積層してラミネートフィルムを製造し、該ラミネートフィルムの前記欠損部を含む側辺を、シーラント層が外側となるように折り返して折り返し部を成形し、次いで折り返し辺に対して垂直な方向にヒートシールを行い、ラミネートフィルムを製袋すると同時に、前記欠損部において折り返し部を容器本体側の基材層に固着させることを特徴とする前記電池等用容器の製造方法が提供される。
According to the present invention, as means for solving the above problems,
In a container for a battery or the like in which a base film including a non-electrolytic solution-resistant resin layer, a barrier layer, and a laminate film sequentially laminated are formed into a bag shape with the base material layer on the outside and the sealant layer on the inside, The laminate film is folded outward around the opening to form a folded portion, and the folded portion is further provided with a defect portion in which the base material layer and the barrier layer are cut off so that the sealant layer is exposed on the container body surface. Provided is a container for a battery or the like, wherein the container is formed and the folded portion is fixed to a base material layer on the container body side at the defect portion.
The container has a heat seal portion in a direction perpendicular to the folded side, and the defective portion is formed at the intersection of the heat seal portion and the folded portion. Provide a container.
Also, a laminate film in which a base material layer, a barrier layer, and a sealant layer are sequentially laminated, wherein the base material layer and the barrier layer have a cut-off portion so that the sealant layer is exposed on both surfaces of the film. There is provided a laminate film used in the production of the battery container or the like.
In addition, after the base material layer, the barrier layer, and the sealant layer are separately formed into a film shape, a defect portion is provided in the base material layer and the barrier layer, and then the defect portion of the barrier layer and the defect portion of the base material layer are at least one. A laminate film is produced by laminating a base material layer, a barrier layer, and a sealant layer so as to overlap each other, and a side portion including the defect portion of the laminate film is folded back so that the sealant layer is on the outer side. And the folded portion is fixed to the base material layer on the container body side at the defect portion, and finally the laminated film is formed into a bag shape so that the folded side becomes an opening. A method for manufacturing a container is provided.
In addition, after the base material layer, the barrier layer, and the sealant layer are separately formed into a film shape, a defect portion is provided in the base material layer and the barrier layer, and then the defect portion of the barrier layer and the defect portion of the base material layer are at least one. A laminate film is produced by laminating a base material layer, a barrier layer, and a sealant layer so as to overlap each other, and a side portion including the defect portion of the laminate film is folded back so that the sealant layer is on the outer side. And then heat-sealing in a direction perpendicular to the folded side to form a laminate film, and at the same time, the folded portion is fixed to the base material layer on the container body side at the defect portion. A method for producing a container for a battery or the like is provided.

本発明の電池等用容器は袋状の容器であって、開口部においてラミネートフィルムが外向きに折り返されているが、折り返し部の一部において基材層およびバリア層の二層が切り取られ、シーラント層が容器本体面に露出している(以下、基材層およびバリア層が切り取られ、シーラント層が露出した部分を「欠損部」とする)。そして欠損部に露出するシーラント層によって、折り返し部が容器本体側の基材層に固着されている。そのため粘着テープ等の別部材を用いなくても、折り返し部が元の状態に戻ることが抑制される。
また基材層、バリア層、シーラント層を積層した後、基材層およびバリア層のみを部分的に切り取ることは困難であるが、本発明の製造方法においては、予め基材層とバリア層について一部を切り取った後に、各層を積層してラミネートフィルムを製造するので、ラミネートフィルムの製造が簡単である。
The container for batteries of the present invention is a bag-like container, and the laminate film is folded outward at the opening, but two layers of the base material layer and the barrier layer are cut off at a part of the folded part, The sealant layer is exposed on the surface of the container main body (hereinafter, a portion where the base material layer and the barrier layer are cut off and the sealant layer is exposed is referred to as a “defect portion”). The folded portion is fixed to the base material layer on the container body side by the sealant layer exposed at the defect portion. Therefore, even if it does not use another members, such as an adhesive tape, it is suppressed that a return part returns to the original state.
Moreover, after laminating the base material layer, the barrier layer, and the sealant layer, it is difficult to partially cut out only the base material layer and the barrier layer. However, in the production method of the present invention, the base material layer and the barrier layer are previously Since a laminated film is produced by laminating each layer after cutting out a part, the production of the laminated film is simple.

本発明の容器に用いられるラミネートフィルムの層構成の一例を示す模式的断面図である。It is typical sectional drawing which shows an example of the laminated constitution of the laminate film used for the container of this invention. 本発明の電池等用容器の一実施例を表す模式的平面図(A)、a−a’端面図(B)、端面図(B)の部分拡大図(C)である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view (A), an a-a ′ end view (B), and a partial enlarged view (C) of an end view (B) illustrating an embodiment of a container for a battery of the present invention. 本発明の電池等用容器の他の実施例を表す模式的平面図(A)、b−b’端面図(B)、端面図(B)の部分拡大図(C)である。FIG. 6 is a schematic plan view (A), a b-b ′ end view (B), and a partial enlarged view (C) of the end view (B) showing another embodiment of the container for a battery of the present invention. 本発明の容器に用いられるラミネートフィルムの、切り取り及びラミネートの順序を示すためのフローチャート(A)(B)、及び欠損部の異なるラミネートフィルムの模式的平面図(C)である。It is the schematic plan view (C) of the flowchart (A) (B) for showing the order of cutting and laminating of the laminate film used for the container of this invention, and a different defect part. 本発明の容器に用いられるラミネートフィルムの、切り取り及びラミネートの順序を示すための他のフローチャートである。It is another flowchart for showing the order of cutting and laminating of the laminate film used for the container of the present invention. 欠損部を有するラミネートフィルムから本発明の容器を製造する方法を説明するフローチャートである。It is a flowchart explaining the method to manufacture the container of this invention from the laminated film which has a defect | deletion part.

以下、図面に基づき本発明について詳細に説明する。図1は、本発明の容器に用いられるラミネートフィルムの層構成の一例を示す模式的断面図である。該ラミネートフィルム10(10’)は基材層11(11’)、バリア層12(12’)、シーラント層13(13’)からなり、基材層11(11’)は非耐電解液性樹脂層11b(11b’)を含む。尚、非耐電解液性樹脂層とは電解液に対する耐性がなく、電解液が付着すると変色、膨潤、溶解等する樹脂からなる層を意味し、例えばナイロン6、ナイロン6,6、ナイロン6,6とナイロン6の共重合体、ナイロン6,10、ポリメタキシリレンアジパミド(MXD6)等のナイロンからなる層である。基材層11は、図1(A)に示すように、非耐電解性樹脂層11bのみから形成されていても、図1(B)に示すように、非耐電解性樹脂層11b’とその外側に設けられた耐電解液性樹脂層11a’から成形されていても良い。尚、耐電解液性樹脂層11a’とは、電解液が付着してもほとんど変質することのない樹脂からなる層を意味し、具体的には、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、エチレンテレフタレート/エチレンイソフタレート共重合体やブチレンテレフタレート/ブチレンイソフタレート共重合体等の共重合ポリエステル等のポリエステルを例示することができる。また、耐電解液性樹脂層11a’、非耐電解液性樹脂層11b(11b’)共に、二軸延伸したものを用いると、ラミネートフィルムの強度が向上する。   Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of a layer configuration of a laminate film used in the container of the present invention. The laminate film 10 (10 ′) includes a base material layer 11 (11 ′), a barrier layer 12 (12 ′), and a sealant layer 13 (13 ′). The base material layer 11 (11 ′) is non-electrolytic solution resistant. The resin layer 11b (11b ′) is included. The non-electrolytic solution-resistant resin layer means a layer made of a resin that is not resistant to the electrolytic solution and discolors, swells, dissolves, etc. when the electrolytic solution adheres. For example, nylon 6, nylon 6, 6, nylon 6, 6 and nylon 6 copolymer, nylon 6,10, and a layer made of nylon such as polymetaxylylene adipamide (MXD6). Even if the base material layer 11 is formed of only the non-electrolytic resin layer 11b as shown in FIG. 1 (A), as shown in FIG. 1 (B), the non-electrolytic resin layer 11b ′ and You may shape | mold from the electrolyte-resistant resin layer 11a 'provided in the outer side. The electrolytic solution-resistant resin layer 11a ′ means a layer made of a resin that hardly changes even when the electrolytic solution adheres. Specifically, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, Examples thereof include polyesters such as copolymerized polyesters such as ethylene terephthalate / ethylene isophthalate copolymer and butylene terephthalate / butylene isophthalate copolymer. In addition, when both the electrolytic solution-resistant resin layer 11a 'and the non-electrolytic solution-resistant resin layer 11b (11b') are biaxially stretched, the strength of the laminate film is improved.

バリア層12(12’)は、リチウム二次電池やキャパシタの内部に水分が浸入することを防止するための層であり、性能面から、アルミニウム、ニッケル、ステンレス等の金属箔が適しており、特に価格面からアルミニウム箔が適する。尚、バリア層がアルミニウム箔の場合は、若干の鉄を含有することが好ましく、更に多少または完全に焼きなまし処理をした軟質傾向にあるアルミニウム箔を用いることが望ましい。またバリア層には、フッ酸に対する耐性、即ち、防食性を向上させ、更にシーラント層11(11’)との密着性を向上させる目的で、クロメート処理、ベーマイト処理、パーカライジング処理、トリアジンチオール処理等の化成処理を施すと良い。
シーラント層13(13’)は、低密度ポリエチレン、高密度ポリエチレン、エチレン−αオレフィン共重合体等のポリエチレン系樹脂や、ポリプロピレン、プロピレン・エチレン共重合体等のポリプロピレン系樹脂等の熱融着性を有する樹脂から形成される。また、これらの樹脂を不飽和カルボン酸やアクリル酸、メタクリル酸、無水マレイン酸等で変性した樹脂やイオン架橋した樹脂を用いても良いてもよい。更にシーラント層13(13’)は、バリア層12(12’)との接着性がよい変性ポリオレフィン系樹脂からなる層と、ヒートシール性が良好なポリオレフィン系樹脂からなる層の二層であってもよい。
The barrier layer 12 (12 ′) is a layer for preventing moisture from entering the inside of the lithium secondary battery or the capacitor, and metal foils such as aluminum, nickel, and stainless steel are suitable in terms of performance. In particular, aluminum foil is suitable in terms of price. In the case where the barrier layer is an aluminum foil, it is preferable to contain some iron, and it is desirable to use an aluminum foil that has a soft tendency to be annealed somewhat or completely. In addition, the barrier layer has a resistance to hydrofluoric acid, that is, an anticorrosive property, and further has improved adhesion to the sealant layer 11 (11 ′), and is subjected to chromate treatment, boehmite treatment, parkerizing treatment, triazine thiol treatment, etc. It is good to perform the chemical conversion treatment.
The sealant layer 13 (13 ') is a heat-sealable material such as polyethylene resins such as low density polyethylene, high density polyethylene, and ethylene-α olefin copolymers, and polypropylene resins such as polypropylene and propylene / ethylene copolymers. It is formed from resin which has. Further, a resin obtained by modifying these resins with an unsaturated carboxylic acid, acrylic acid, methacrylic acid, maleic anhydride, or the like, or an ion-crosslinked resin may be used. Further, the sealant layer 13 (13 ′) is a two-layered layer composed of a modified polyolefin resin having good adhesion to the barrier layer 12 (12 ′) and a layer composed of a polyolefin resin having good heat sealability. Also good.

図2は、本発明の電池等用容器の一実施例を表す模式的平面図(A)、a−a’端面図(B)、折り返し部の部分拡大図(C)である。本発明の電池等用容器20は、図1に示すラミネートフィルムを基材層29が外側、シーラント層27が内側になるように折り返した後、二方をシールして袋にした容器、あるいは図1に示すラミネートフィルムを二枚用意し、これを基材層29が外側、シーラント層27が内側になるように重ね合わせた後、三方をシールして袋にした容器であり、開口部23においてラミネートフィルムが外向きに折り返され、折り返し部21を有する。そして該折り返し部21には、シーラント層27を容器本体22面に露出させる欠損部24が形成されており、該欠損部24においてシーラント層27が溶け出し、容器本体22側の基材層29に熱融着している。そのため折り返し部21が容器本体22側の基材層に固着され、折り返し部21に多少の力が加わっても元の状態(折り返されていない状態)に戻ることが抑制される。   FIG. 2 is a schematic plan view (A), an a-a ′ end view (B), and a partially enlarged view (C) of the folded portion, showing an embodiment of the container for a battery of the present invention. The battery container 20 of the present invention is a container in which the laminate film shown in FIG. 1 is folded so that the base material layer 29 is on the outside and the sealant layer 27 is on the inside, and then sealed on both sides to form a bag, or FIG. 1 is a container in which two laminate films shown in FIG. 1 are prepared, and are laminated so that the base material layer 29 is on the outside and the sealant layer 27 is on the inside, and then sealed on three sides to form a bag. The laminate film is folded outward and has a folded portion 21. The folded portion 21 is formed with a defect 24 that exposes the sealant layer 27 to the surface of the container body 22, and the sealant layer 27 is melted at the defect 24 to form a base material layer 29 on the container body 22 side. It is heat-sealed. Therefore, the folded-back portion 21 is fixed to the base material layer on the container body 22 side, and even if a slight force is applied to the folded-back portion 21, it is suppressed from returning to the original state (the unfolded state).

図3は、本発明の他の実施例を表す模式的平面図(A)、b−b’端面図(B)、折り返し部の部分拡大図(C)である。図3に図示する電池等容器30も、図2の容器20と同様に、該折り返し部31に欠損部34が形成されているが、図2の容器20と異なり、該欠損部34が折り返し辺36に対して垂直な方向のヒートシール部35と折り返し部31との交点に設けられている。該電池等容器30は容器の幅に合わせて欠損部34を設ける必要があるが、ヒートシール部35をシールバーで成形すると同時に、欠損部34におけるシーラント層37を溶融させ、折り返し部31を容器本体32側の基材層に固着することができる。   FIG. 3 is a schematic plan view (A), a b-b ′ end view (B), and a partially enlarged view (C) of a folded portion, showing another embodiment of the present invention. 3 also has a defect portion 34 formed in the folded portion 31 as in the case of the container 20 in FIG. 2. Unlike the container 20 in FIG. 2, the defect portion 34 has a folded side. It is provided at the intersection of the heat seal portion 35 and the folded portion 31 in a direction perpendicular to the direction 36. The container 30 such as a battery needs to be provided with a defect part 34 in accordance with the width of the container. At the same time as the heat seal part 35 is molded with a seal bar, the sealant layer 37 in the defect part 34 is melted, and the folded part 31 is formed in the container. It can be fixed to the base material layer on the main body 32 side.

次に、本発明の電池等用容器の製造方法について、図4〜図6に基づいて説明する。本発明者らは、容器を製造するために必要な欠損部を有するラミネートフィルムの製造方法として図4に示す方法を、欠損部を有するラミネートフィルムから容器を製造する方法として図5、図6に示す二つの方法を提案する。
図4に示す方法は、基材層41、バリア層42、シーラント層43を別々に製造した後、基材層41およびバリア層42は少なくとも一部を切り取って欠損部44を成形し(A)、その後基材層41の欠損部44とバリア層42の欠損部44とが少なくとも一部で重なるように、基材層41、バリア層42、シーラント層43を積層し(B)、必要に応じてスリット加工を行い、一側辺近傍に欠損部44のあるラミネートフィルム40を得る方法である。尚、図4では各層を積層する前に欠損部44を設けたが、基材層41とバリア層42とを予め積層した後、二層に同時に欠損部44を設け、その後シーラント層を積層してラミネートフィルム40を製造してもよい。欠損部44の大きさ、形状は特に限定されないが、欠損部44から露出するシーラント層43でもって、折り返し部を容器本体側の基材層に確実に固着させるためには、例えば直径が2〜20mm程度の略円形状であると良い。また欠損部44の間隔は容器の幅以下であれば特に限定されない。
尚、図4(A)〜(B)では、欠損部44をラミネートフィルムの一側辺より若干内側に設けたが、図4(C)に示すように、欠損部44’をラミネートフィルムの一側辺上に設けても良い。
Next, the manufacturing method of the container for batteries etc. of this invention is demonstrated based on FIGS. The present inventors have shown the method shown in FIG. 4 as a method for producing a laminate film having a defective portion necessary for producing a container, and the method shown in FIGS. 5 and 6 as a method for producing a container from a laminate film having a defective portion. Two methods are proposed.
In the method shown in FIG. 4, after the base material layer 41, the barrier layer 42, and the sealant layer 43 are separately manufactured, at least a part of the base material layer 41 and the barrier layer 42 is cut to form the defect portion 44 (A). Then, the base material layer 41, the barrier layer 42, and the sealant layer 43 are laminated so that the defective portion 44 of the base material layer 41 and the defective portion 44 of the barrier layer 42 overlap at least partially (B), and if necessary In this method, slit processing is performed to obtain a laminate film 40 having a defect 44 near one side. In FIG. 4, the defect portion 44 is provided before each layer is laminated. However, after the base material layer 41 and the barrier layer 42 are laminated in advance, the defect portion 44 is simultaneously provided in the two layers, and then the sealant layer is laminated. Thus, the laminate film 40 may be manufactured. The size and shape of the defect portion 44 are not particularly limited. In order to securely fix the folded portion to the base material layer on the container body side with the sealant layer 43 exposed from the defect portion 44, for example, the diameter is 2 to 2. A substantially circular shape of about 20 mm is preferable. Moreover, the space | interval of the defect | deletion part 44 will not be specifically limited if it is below the width | variety of a container.
In FIGS. 4A to 4B, the defect portion 44 is provided slightly inside one side of the laminate film. However, as shown in FIG. 4C, the defect portion 44 ′ is formed on one side of the laminate film. It may be provided on the side.

次に、図4に示す方法を用いて製造されたラミネートフィルムを用いて、本発明の容器を製造する方法について図5、図6を用いて説明する。図5は、欠損部53を含むラミネートフィルム50の側辺を折り返して折り返し部52を形成し(B)、欠損部53にシールバーを当てるなどして、欠損部53のシーラント層を容器本体側の基材層に熱融着させ、折り返し部52をフィルム本体51に固着させて(C)、その後同様のフィルムをもう一枚用意し、シーラント層同士が重なり、折り返し部52が近接するように、二枚のラミネートフィルムを重ね合わせ(D)、更に一定間隔ごとにラミネートフィルムをシールおよびカットし(E)、電池等用容器を製造する方法である。図5の製造方法は、後述する図6の製造方法のように、袋の幅と欠損部53間の距離が一致する必要がない。よって多品種少量生産を行う場合に適する。   Next, a method for producing the container of the present invention using the laminate film produced using the method shown in FIG. 4 will be described with reference to FIGS. FIG. 5 shows that the side of the laminate film 50 including the defective portion 53 is folded to form a folded portion 52 (B), and a seal bar is applied to the defective portion 53 so that the sealant layer of the defective portion 53 is placed on the container body side. (C) after which the folded portion 52 is fixed to the film body 51, and another similar film is prepared so that the sealant layers overlap and the folded portion 52 comes close. In this method, two laminated films are overlaid (D), and the laminated film is sealed and cut at regular intervals (E) to produce a battery container or the like. The manufacturing method of FIG. 5 does not need to match the width of the bag and the distance between the defect portions 53 unlike the manufacturing method of FIG. Therefore, it is suitable for high-mix low-volume production.

図6の製造方法は、欠損部63を含むラミネートフィルム60の側辺を折り返して折り返し部62を形成した後、これを容器に成形すると同時に、欠損部63のシーラント層を溶融させて折り返し部62をフィルム本体61に固着させ、容器を製造する方法である。具体的には、ラミネートフィルム60を製造する際に欠損部63間の距離を容器の幅に合せておき、該欠損部63を含むラミネートフィルム側辺を折り返し(B)、同様のフィルムをもう一枚用意し、二枚のラミネートフィルムをシーラント層が内側になるように重ね合わせ(C)、ラミネートフィルムをシールおよびカットし(D)、製造する方法である。このとき、ヒートシール部64を設けると同時に、欠損部63のシーラント層を溶融させ、折り返し部62を容器本体側の基材層に固着させる。該方法を用いると、欠損部63のシーラント層を溶融させるための工程を改めて設ける必要がない。
尚、図5、図6は共に二枚のラミネートフィルムから容器を製造する方法について説明したが、一枚のラミネートフィルムの両側辺近傍に欠損部を設け、更に両側辺に折り返し部62を成形し、これを半折して本発明の容器を製造することもできる。
In the manufacturing method of FIG. 6, the side of the laminate film 60 including the defect portion 63 is folded to form the folded portion 62, and then formed into a container. At the same time, the sealant layer of the defect portion 63 is melted to be folded. Is fixed to the film body 61 to produce a container. Specifically, when the laminate film 60 is manufactured, the distance between the defect portions 63 is matched to the width of the container, the side of the laminate film including the defect portion 63 is folded back (B), and another similar film is prepared. In this method, two sheets of laminated film are prepared, two laminated films are stacked so that the sealant layer is inside (C), and the laminated film is sealed and cut (D). At this time, the heat seal portion 64 is provided, and at the same time, the sealant layer of the defect portion 63 is melted, and the folded portion 62 is fixed to the base material layer on the container main body side. If this method is used, it is not necessary to provide a process for melting the sealant layer of the defect portion 63 again.
5 and 6 both explain the method of manufacturing a container from two laminated films. However, a defective portion is provided in the vicinity of both sides of one laminated film, and folded portions 62 are formed on both sides. The container of the present invention can be manufactured by folding it halfway.

本発明の電池等用容器を用いてリチウム二次電池やキャパシタを製造するには、開口部から内容物を挿入し、電極端子を電池等用容器の内部から外部に延長し、開口部を熱接着により密封して製造するとよい。   To manufacture a lithium secondary battery or capacitor using the battery container of the present invention, the contents are inserted from the opening, the electrode terminal is extended from the inside of the battery container to the outside, and the opening is heated. It is good to manufacture by sealing by adhesion.

本発明の容器は、リチウムイオン電池やリチウムポリマー電池等のリチウム二次電池や、キャパシタを製造する際に利用することができる。また、本発明の趣旨を逸脱しない範囲で変更可能であり、電解液を用いる様々な容器に利用することができる。   The container of this invention can be utilized when manufacturing lithium secondary batteries, such as a lithium ion battery and a lithium polymer battery, and a capacitor. Moreover, it can change in the range which does not deviate from the meaning of this invention, and can utilize for the various containers which use electrolyte solution.

10 10’ 40 50 60 ラミネートフィルム
11 11’ 29 39 41 基材層
11a’ 耐電解液性樹脂層
11b 11b’ 非耐電解性樹脂層
12 12’ 28 38 42 バリア層
13 13’ 27 37 43 シーラント層
20 30 電池等用容器
21 31 52 62 折り返し部
22 32 容器本体
23 33 開口部
24 34 44 53 63 欠損部
25 35 54 64 ヒートシール部
26 36 折り返し辺
51 61 フィルム本体
10 10 '40 50 60 Laminate film 11 11' 29 39 41 Base material layer 11a 'Electrolytic liquid resistant resin layer 11b 11b' Non-electrolytic resistant resin layer 12 12 '28 38 42 Barrier layer 13 13' 27 37 43 Sealant layer 20 30 Battery container 21 31 52 62 Folding part 22 32 Container body 23 33 Opening part 24 34 44 53 63 Defect part 25 35 54 64 Heat seal part 26 36 Folding side 51 61 Film body

Claims (5)

非耐電解液性樹脂層を含む基材層、バリア層、シーラント層が順次積層されたラミネートフィルムを、基材層を外側、シーラント層を内側にして袋状に成形した電池等用容器において、
前記ラミネートフィルムが開口部周辺で外向きに折り返されて折り返し部を形成し、
更に該折り返し部に、シーラント層が容器本体面に露出するように基材層およびバリア層が切り取られた欠損部が形成されており、
該欠損部において、前記折り返し部が容器本体側の基材層に固着されていることを特徴とする電池等用容器。
In a container for a battery or the like in which a base film including a non-electrolytic solution-resistant resin layer, a barrier layer, and a laminate film sequentially laminated are formed into a bag shape with the base material layer on the outside and the sealant layer on the inside,
The laminate film is folded outward around the opening to form a folded portion,
Furthermore, a chipped portion in which the base material layer and the barrier layer are cut off so that the sealant layer is exposed on the container body surface is formed in the folded portion,
A container for a battery or the like, wherein the folded portion is fixed to a base material layer on the container body side in the defect portion.
前記容器が折り返し辺に対して垂直な方向のヒートシール部を有しており、該ヒートシール部と折り返し部との交点に前記欠損部が形成されていることを特徴とする請求項1記載の電池等用容器。 The said container has a heat seal part of the direction perpendicular | vertical with respect to a folding | turning side, The said defect | deletion part is formed in the intersection of this heat sealing part and a folding | turning part. Container for batteries. 基材層、バリア層、シーラント層が順次積層されたラミネートフィルムであって、
シーラント層がフィルム両面に露出するように、基材層及びバリア層が切り取られた欠損部を有することを特徴とする請求項1乃至2のいずれかに記載の電池等用容器の製造に用いられるラミネートフィルム。
A laminate film in which a base material layer, a barrier layer, and a sealant layer are sequentially laminated,
The base material layer and the barrier layer have a cut-out portion so that the sealant layer is exposed on both sides of the film, and used for manufacturing a battery container or the like according to any one of claims 1 to 2. Laminate film.
基材層、バリア層、シーラント層をそれぞれ別々にフィルム状に成形した後、基材層およびバリア層に欠損部を設け、次いでバリア層の欠損部と基材層の欠損部とが少なくとも一部で重なるように、基材層、バリア層、シーラント層を積層してラミネートフィルムを製造し、
該ラミネートフィルムの前記欠損部を含む側辺を、シーラント層が外側となるように折り返して折り返し部を成形し、更に欠損部において折り返し部を容器本体側の基材層に固着させ、最後に折り返し辺が開口部となるようにラミネートフィルムを袋状に成形することを特徴とする請求項1記載の電池等用容器の製造方法。
After the base material layer, the barrier layer, and the sealant layer are separately formed into films, a defect portion is provided in the base material layer and the barrier layer, and then the defect portion of the barrier layer and the defect portion of the base material layer are at least partially Laminate a base material layer, a barrier layer, and a sealant layer so as to overlap with each other to produce a laminate film,
The side of the laminate film including the chipped portion is folded so that the sealant layer is on the outside to form a folded portion, and the folded portion is fixed to the base material layer on the container body side at the chipped portion, and finally folded. The method for producing a container for a battery or the like according to claim 1, wherein the laminate film is formed into a bag shape so that the side is an opening.
基材層、バリア層、シーラント層をそれぞれ別々にフィルム状に成形した後、基材層およびバリア層に欠損部を設け、次いでバリア層の欠損部と基材層の欠損部とが少なくとも一部で重なるように、基材層、バリア層、シーラント層を積層してラミネートフィルムを製造し、
該ラミネートフィルムの前記欠損部を含む側辺を、シーラント層が外側となるように折り返して折り返し部を成形し、次いで折り返し辺に対して垂直な方向にヒートシールを行い、ラミネートフィルムを製袋すると同時に、前記欠損部において折り返し部を容器本体側の基材層に固着させることを特徴とする請求項1乃至2のいずれかに記載の電池等用容器の製造方法。
After the base material layer, the barrier layer, and the sealant layer are separately formed into films, a defect portion is provided in the base material layer and the barrier layer, and then the defect portion of the barrier layer and the defect portion of the base material layer are at least partially Laminate a base material layer, a barrier layer, and a sealant layer so as to overlap with each other to produce a laminate film,
When the side of the laminate film including the defect is folded back so that the sealant layer is on the outside, a folded portion is formed, and then heat sealing is performed in a direction perpendicular to the folded side, and the laminate film is made into a bag 3. The method for producing a container for a battery or the like according to claim 1, wherein the folded portion is fixed to the base material layer on the container body side at the same time.
JP2009215606A 2009-09-17 2009-09-17 Container for battery or the like and manufacturing method of the same Pending JP2011065866A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009215606A JP2011065866A (en) 2009-09-17 2009-09-17 Container for battery or the like and manufacturing method of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009215606A JP2011065866A (en) 2009-09-17 2009-09-17 Container for battery or the like and manufacturing method of the same

Publications (1)

Publication Number Publication Date
JP2011065866A true JP2011065866A (en) 2011-03-31

Family

ID=43951911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009215606A Pending JP2011065866A (en) 2009-09-17 2009-09-17 Container for battery or the like and manufacturing method of the same

Country Status (1)

Country Link
JP (1) JP2011065866A (en)

Similar Documents

Publication Publication Date Title
EP2824728B1 (en) Resin-metal composite sealed container and method for producing same
JP5103693B2 (en) Battery laminated film and battery container using the same
JP6990972B2 (en) Exterior material for power storage device and power storage device using it
TW201637262A (en) Package for power storage device
JP2002056824A (en) Laminated film for battery, and battery container using it
KR20140130032A (en) Sealing part and container for charging device
KR101811934B1 (en) Safety-device-fitted electrochemical device and safety device for electrochemical device
JP7240824B2 (en) Deep-drawn molded case for exterior of power storage device and power storage device
JP2011142092A (en) Laminated film for batter and container for battery using the same
JP6738171B2 (en) Exterior material for power storage device and power storage device
JP4972816B2 (en) Polymer battery packaging materials
JP2015153513A (en) Laminate packaged battery
JP2003051291A (en) Packaging material for cell, and the cell using the same
JP2017195112A (en) Exterior material for power storage device, and power storage device
JP2001176466A (en) Battery case
JP2020050439A (en) Power storage device
JP2004158434A (en) Lithium cell
JP2015232957A (en) Jacket member with cooling fin for electrochemical device, and electrochemical device
JP2011065866A (en) Container for battery or the like and manufacturing method of the same
JP7048858B2 (en) Pouch type secondary battery and its manufacturing method
JP2002343313A (en) Packaging material for battery
JP6393971B2 (en) Secondary battery exterior material and secondary battery
JP2001222982A (en) Housing for thin battery
JP2011142091A (en) Laminated film for battery, and container for battery using it
JP2002216719A (en) Adhesive film used at tab part of lithium battery