JP2017043037A - Methods for manufacturing laminate packaging material and power storage device electrode member - Google Patents
Methods for manufacturing laminate packaging material and power storage device electrode member Download PDFInfo
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- 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
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- 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
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Abstract
Description
本発明は、蓄電デバイスの外装体や食品等の包装材に用いられるラミネート外装材の製造方法、外装材を兼ねる蓄電デバイス用電極部材の製造方法、ならびにそれらの関連技術に関する。 The present invention relates to a method for manufacturing a laminate exterior material used for a packaging material for an exterior body of an electricity storage device or food, a method for manufacturing an electrode member for an electrical storage device that also serves as an exterior material, and related technologies thereof.
近年、スマートフォンやタブレット端末等の携帯機器の薄型軽量化に伴い、これらに搭載されるリチウムイオン二次電池やリチウムポリマー二次電池の外装材としては、従来の金属缶に代えて金属箔の両面に樹脂フィルムを貼り合わせたラミネート材が用いられている。また、電気自動車用の電源や蓄電用の大型電池やキャパシタにおいても、外装材としてラミネート材を用いることが検討されている。 In recent years, with the reduction in thickness and weight of mobile devices such as smartphones and tablet terminals, the exterior material of lithium ion secondary batteries and lithium polymer secondary batteries mounted on these devices has been replaced with metal foil on both sides. A laminate material in which a resin film is bonded together is used. In addition, the use of a laminate material as an exterior material has also been studied in power sources for electric vehicles, large batteries for power storage, and capacitors.
一般にラミネート外装材は金属缶に比べて、薄く、軽量で、成形および密封が容易であり扱い易いが、電池ケースとして使用した場合は金属面が外部に露出することがないので、乾電池のように外装そのものを導体として用いることができない。そのため、ケース内から絶縁処理をした正極端子および負極端子を引き出してはんだ付等によって結線し、電池自体は基板や筐体に粘着テープ等で固定されることが多い。また、電池ケース以外の用途においても、ジャムや調理済食品を発熱体に接触させて効率良く加温したり、ジュール加熱によって殺菌出来る容器包装に金属面の露出が望まれている。 In general, laminated outer packaging materials are thinner and lighter than metal cans, are easy to form and seal, and easy to handle, but when used as a battery case, the metal surface is not exposed to the outside, so The exterior itself cannot be used as a conductor. For this reason, the positive electrode terminal and the negative electrode terminal subjected to insulation treatment are pulled out from the case and connected by soldering or the like, and the battery itself is often fixed to the substrate or the case with an adhesive tape or the like. Also, in applications other than battery cases, it is desired to expose a metal surface to a container package that can be efficiently heated by bringing jam or cooked food into contact with a heating element or sterilized by Joule heating.
ラミネート外装材は層の中心に金属箔が用いられているので、外側の樹脂層を除去することで金属箔を露出させることができれば、これを導体やはんだ付部等として利用できる可能性がある。 Since the laminate outer packaging material uses a metal foil in the center of the layer, if the metal foil can be exposed by removing the outer resin layer, this may be used as a conductor or a soldered part. .
ラミネート外装材の金属箔を切らずに樹脂層のみを切る技術としては、食品や医療器具を密封状態に包装する包装袋において、樹脂層にレーザー加工や金属刃による機械加工によって切れ目を入れることによって片手で開封できるようにした易開封包装袋がある（特許文献１参照）。 As a technology to cut only the resin layer without cutting the metal foil of the laminate exterior material, in a packaging bag that wraps food and medical equipment in a sealed state, the resin layer is cut by laser processing or mechanical processing with a metal blade. There is an easy-open packaging bag that can be opened with one hand (see Patent Document 1).
特許文献１はラミネート外装材を断面方向に切断して包装袋を開封するための技術であって、樹脂層を除去して金属箔を露出させることに適用することはできない。仮に樹脂層にレーザーを照射しても線状の切れ目が形成されるだけであり、樹脂層を面状に除去してはんだ付可能な面積の金属箔を露出させるには至らない。また、レーザーを往復させて樹脂が残らないように樹脂層を面状に焼き切るには大変手間がかかる。 Patent Document 1 is a technique for cutting a laminate outer packaging material in a cross-sectional direction to open a packaging bag, and cannot be applied to removing a resin layer and exposing a metal foil. Even if the resin layer is irradiated with a laser, only a linear cut is formed, and the resin layer cannot be removed in a planar shape to expose a metal foil having a solderable area. Further, it takes much time and effort to burn the resin layer into a planar shape so that the resin does not remain by reciprocating the laser.
本発明は上述した技術背景に鑑み、金属箔の両面に樹脂層が貼り合わされ金属箔露出部を有するラミネート外装材を効率良く製造する方法、および金属箔露出部を有し活物質部が露出する蓄電デバイス用電極部材を効率良く製造する方法、ならびにそれらの関連技術の提供を目的とする。 In view of the above-described technical background, the present invention provides a method for efficiently producing a laminate exterior material having a metal foil exposed portion in which a resin layer is bonded to both surfaces of a metal foil, and an active material portion having a metal foil exposed portion. It is an object of the present invention to provide a method for efficiently producing an electrode member for an electricity storage device and related techniques thereof.
即ち、本発明は下記［１］〜［６］に記載の構成を有する。 That is, this invention has the structure as described in following [1]-[6].
［１］金属箔の第一の面に耐熱性樹脂層を貼り合わせる耐熱性樹脂層貼り合わせ工程と、
前記金属箔の第二の面に熱可塑性樹脂層を貼り合わせる熱可塑性樹脂層貼り合わせ工程とを含み、
前記耐熱性樹脂層貼り合わせ工程および熱可塑性樹脂層貼り合わせ工程のうちの少なくとも一方の工程を、樹脂層の一部を切り取って少なくとも１つの窓部を形成し、前記窓部を有する樹脂層に接着剤を塗布して金属箔とを貼り合わせることにより行い、前記窓部から金属箔を覗かせて金属箔露出部を形成することを特徴とするラミネート外装材の製造方法。
[1] A heat-resistant resin layer laminating step for laminating a heat-resistant resin layer to the first surface of the metal foil;
Including a thermoplastic resin layer laminating step for laminating a thermoplastic resin layer to the second surface of the metal foil,
At least one of the heat-resistant resin layer laminating step and the thermoplastic resin layer laminating step is performed by cutting out a part of the resin layer to form at least one window portion, and forming the resin layer having the window portion. A method for producing a laminated exterior material, characterized in that an adhesive is applied and bonded to a metal foil, and a metal foil exposed portion is formed by looking through the window from the window.
［２］蓄電デバイスの正極または負極となる金属箔の第一の面に耐熱性樹脂層を貼り合わせる耐熱性樹脂層貼り合わせ工程と、
前記金属箔の第二の面の一部に活物質を付与して活物質部を形成する活物質付与工程と、
前記金属箔の第二の面に熱可塑性樹脂層を貼り合わせる熱可塑性樹脂層貼り合わせ工程とを含み、
耐熱性樹脂層貼り合わせ工程および熱可塑性樹脂層貼り合わせ工程のうちの少なくとも一方の工程を、樹脂層の一部を切り取って少なくとも１つの窓部を形成し、前記窓部を形成した樹脂層と金属箔とを貼り合わせることにより行い、前記窓部において直下の層を覗かせることを特徴とする蓄電デバイス用電極部材の製造方法。
[2] A heat-resistant resin layer laminating step of laminating a heat-resistant resin layer to the first surface of the metal foil that becomes the positive electrode or negative electrode of the electricity storage device;
An active material applying step of forming an active material portion by applying an active material to a part of the second surface of the metal foil;
Including a thermoplastic resin layer laminating step for laminating a thermoplastic resin layer to the second surface of the metal foil,
At least one of the heat-resistant resin layer laminating step and the thermoplastic resin layer laminating step is formed by cutting out a part of the resin layer to form at least one window portion, and the resin layer having the window portion formed thereon, A method for producing an electrode member for an electricity storage device, wherein the method is performed by pasting together a metal foil, and the layer directly under the window is viewed.
［３］前記樹脂層の窓部から金属箔を覗かせて金属箔露出部を形成する前項２に記載の蓄電デバイス用電極材の製造方法。 [3] The method for producing an electrode material for an electricity storage device according to item 2 above, wherein the exposed portion of the metal foil is formed by looking into the metal foil from the window portion of the resin layer.
［４］前記熱可塑性樹脂層貼り合わせ工程を活物質付与工程の後に行い、前記熱可塑性樹脂層貼り合わせ工程を前記窓部を形成した熱可塑性樹脂層と金属箔とを貼り合わせることにより行い、前記窓部から活物質部を覗かせて活物質部を露出させる前項２または３に記載の蓄電デバイス用電極部材の製造方法。 [4] The thermoplastic resin layer laminating step is performed after the active material applying step, and the thermoplastic resin layer laminating step is performed by laminating the thermoplastic resin layer in which the window portion is formed and the metal foil, 4. The method for producing an electrode member for an electricity storage device according to item 2 or 3, wherein the active material part is exposed through the window part to expose the active material part.
［５］金属箔の第一の面に耐熱性樹脂層が貼り合わされ第二の面に熱可塑性樹脂層が貼り合わされ、少なくとも熱可塑性樹脂層側の面に金属箔が露出する金属箔露出部を有するラミネート外装材を作製する外装材作製工程と、
正極箔と負極箔とがセパレーターにより隔てられた電極本体を作製する工程と、
前記外装材作製工程により作製した２枚のラミネート外装材を熱可塑性樹脂層同士を向かい合わせることにより、室内に金属箔露出部が臨む収納室を形成するとともに外面に金属箔露出部を有する外装体を作製する工程と、
前記外装体の収納室に前記電極本体を装填して正極箔を一方のラミネート外装材の金属露出部に接触させるともに負極箔をもう一方のラミネート外装材の金属露出部に接触させ、収納室に電解質を注入した状態で２枚のラミネート外装材の熱可塑性樹脂層をヒートシール接合する工程とを含み、
前記２枚のラミネート外装材のうちの少なくとも１枚のラミネート外装材を作製する外装材作製工程を前項１に記載のラミネート外装材の製造方法により行うことを特徴とする蓄電デバイスの製造方法。
[5] A metal foil exposed portion in which a heat-resistant resin layer is bonded to the first surface of the metal foil, a thermoplastic resin layer is bonded to the second surface, and at least the metal foil is exposed on the surface of the thermoplastic resin layer side. An exterior material production process for producing a laminate exterior material,
Producing an electrode body in which a positive foil and a negative foil are separated by a separator;
An exterior body having a metal foil exposed portion on the outer surface while forming a storage chamber facing the exposed portion of the metal foil by facing the thermoplastic resin layers of the two laminated exterior materials produced by the exterior material producing step. A step of producing
The electrode body is loaded into the housing chamber of the exterior body, and the positive foil is brought into contact with the metal exposed portion of one laminate exterior material, and the negative foil is brought into contact with the metal exposed portion of the other laminate exterior material, Heat sealing and bonding the thermoplastic resin layers of the two laminate sheathing materials in a state where the electrolyte is injected,
A method for manufacturing an electricity storage device, wherein an exterior material preparation step for preparing at least one laminate exterior material of the two laminate exterior materials is performed by the method for manufacturing a laminate exterior material according to item 1 above.
［６］正極となる金属箔の第一の面に耐熱性樹脂層が貼り合わされ、第二の面の一部に正極活物質部を有し正極活物質部の周囲に熱可塑性樹脂層が貼り合わされた正極部材を作製する工程と、
負極となる金属箔の第一の面に耐熱性樹脂層が貼り合わされ、第二の面の一部に負極活物質部を有し負極活物質部の周囲に熱可塑性樹脂層が貼り合わされた負極部材を作製する工程と、
前記正極部材と前記負極部材とを互いの熱可塑性樹脂層で接触させて外面に金属露出部を有する外装体を形成し、前記正極活物質部と前記負極活物質部との間にセパレーターを挟み電解質を注入した状態で前記正極部材の熱可塑性樹脂層と前記負極部材の熱可塑性樹脂層とをヒートシール接合する工程とを含み、
前記正極部材を作製する工程および負極部材を作製する工程のうちの少なくとも一方の工程を前項２〜４のうちのいずれかに記載の蓄電デバイス用電極部材の製造方法により行うことを特徴とする蓄電デバイスの製造方法。
[6] A heat-resistant resin layer is bonded to the first surface of the metal foil to be the positive electrode, a positive electrode active material portion is provided on a part of the second surface, and a thermoplastic resin layer is bonded around the positive electrode active material portion. Producing a combined positive electrode member;
A negative electrode in which a heat-resistant resin layer is bonded to the first surface of the metal foil to be the negative electrode, a negative electrode active material portion is formed on a part of the second surface, and a thermoplastic resin layer is bonded around the negative electrode active material portion Producing a member;
The positive electrode member and the negative electrode member are brought into contact with each other with a thermoplastic resin layer to form an exterior body having a metal exposed portion on the outer surface, and a separator is sandwiched between the positive electrode active material portion and the negative electrode active material portion. Heat sealing and joining the thermoplastic resin layer of the positive electrode member and the thermoplastic resin layer of the negative electrode member in a state where an electrolyte is injected,
5. An electricity storage comprising performing at least one of the step of producing the positive electrode member and the step of producing the negative electrode member by the method for producing an electrode member for an electricity storage device according to any one of the preceding items 2 to 4. Device manufacturing method.
上記［１］に記載のラミネート外装材の製造方法は、耐熱性樹脂層貼り合わせ工程および熱可塑性樹脂層貼り合わせのうちの少なくとも一方の工程を、窓付き樹脂層と金属箔との貼り合わせによって行う。この貼り合わせ方法によれば、貼り合わせと同時に窓部から金属箔を覗かせて、金属箔が露出する金属箔露出部を形成できる。しかも、窓部付き樹脂層に接着剤を塗布し金属箔に接着剤を塗布しないので、残留接着剤による露出不良も起こらない。前記金属箔露出部の寸法、位置、数の変更は樹脂層に形成する窓部を変更すればよいので、容易に設計変更できる。以上より、金属箔露出部を有するラミネート外装材を効率良く製造できる。 In the method for producing a laminate exterior material according to [1], at least one of the heat-resistant resin layer bonding step and the thermoplastic resin layer bonding is performed by bonding a resin layer with a window and a metal foil. Do. According to this bonding method, the metal foil exposed portion where the metal foil is exposed can be formed by looking through the metal foil from the window simultaneously with the bonding. In addition, since the adhesive is applied to the resin layer with a window and the adhesive is not applied to the metal foil, the exposure failure due to the residual adhesive does not occur. Since the size, position, and number of the exposed metal foil portions may be changed by changing the window portion formed in the resin layer, the design can be easily changed. As described above, a laminate exterior material having a metal foil exposed portion can be efficiently produced.
上記［２］に記載の蓄電デバイス用電極材の製造方法によれば、耐熱性樹脂層貼り合わせ工程および熱可塑性樹脂層貼り合わせのうちの少なくとも一方の工程を、窓付き樹脂層と金属箔との貼り合わせによって行う。この貼り合わせ方法によれば、貼り合わせと同時に窓部の直下の層を覗かせて、窓部の直下の層が露出する蓄電デバイス用電極を効率良く製造できる。 According to the method for producing an electrode material for an electricity storage device described in [2] above, at least one of the heat-resistant resin layer laminating step and the thermoplastic resin layer laminating is performed with a resin layer with window and a metal foil. It is done by pasting together. According to this bonding method, it is possible to efficiently manufacture an electrode for an electricity storage device in which the layer immediately below the window is viewed simultaneously with the bonding, and the layer immediately below the window is exposed.
上記［３］に記載の蓄電デバイス用電極部材の製造方法によれば、樹脂層の窓部から金属箔を覗かせて金属箔露出部を形成でき、金属箔露出部を有する蓄電デバイス用電極材を効率良く製造できる。 According to the method for producing an electrode member for an electricity storage device described in [3] above, the metal foil exposed portion can be formed by looking through the metal foil from the window portion of the resin layer, and the electrode material for the electricity storage device having the metal foil exposed portion Can be manufactured efficiently.
上記［４］に記載の蓄電デバイス用電極部材の製造方法によれば、熱可塑性樹脂層の窓部から活物質層を覗かせて、活物質部が露出する蓄電デバイス用電極材を効率良く製造できる。 According to the method for producing an electrode member for an electricity storage device described in [4] above, an electrode material for an electricity storage device in which the active material portion is exposed is efficiently produced by looking through the window of the thermoplastic resin layer into the active material layer. it can.
上記［５］に記載の蓄電デバイスの製造方法によれば、外装体を構成するラミネート外装材の金属箔を電気の導通部として利用し、収納室内の金属箔露出部に電極本体の正極箔および負極箔が導通し、外装体外面の金属箔露出部で電気の授受を行う、タブリードを持たない蓄電デバイスを作製できる。そして、前記ラミネート外装材を窓部付き樹脂層と金属箔の貼り合わせる工程で作製することにより、蓄電デバイスを効率良く製造できる。 According to the method for manufacturing an electricity storage device described in [5] above, the metal foil of the laminate exterior material constituting the exterior body is used as an electrical conduction portion, and the positive electrode foil of the electrode body and the metal foil exposed portion in the storage chamber are used. An electricity storage device having no tab lead, in which the negative electrode foil is electrically connected and electricity is transferred and received at the metal foil exposed portion on the outer surface of the outer package, can be manufactured. And an electrical storage device can be manufactured efficiently by producing the said laminate exterior material in the process of bonding the resin layer with a window part, and metal foil.
上記［６］に記載の蓄電デバイスの製造方法によれば、蓄電デバイス用電極部材の金属箔を電極とし、蓄電デバイス用電極部材が外装体を兼ね、外装体外面の金属箔露出部で電気の授受を行うことで、タブリードを持たない蓄電デバイスを作製できる。そして、前記蓄電デバイス用電極部材を窓部付き樹脂層と金属箔とを貼り合わせる工程で作製することにより、蓄電デバイスを効率良く製造できる。 According to the method for manufacturing an electricity storage device described in [6] above, the metal foil of the electrode member for the electricity storage device is used as an electrode, and the electrode member for the electricity storage device also serves as an exterior body. By giving and receiving, an electricity storage device having no tab lead can be manufactured. And an electrical storage device can be manufactured efficiently by producing the said electrode member for electrical storage devices in the process of bonding the resin layer with a window part, and metal foil.
［ラミネート外装材およびその製造方法］
図１Ａ〜１Ｃに本発明の方法により作製したラミネート外装材１を示す。
[Laminate exterior material and manufacturing method thereof]
1A to 1C show a laminate exterior material 1 produced by the method of the present invention.
前記ラミネート外装材１は、金属箔１１の第一の面に第一接着剤層１２により外側層となる耐熱性樹脂層１３が貼り合わされ、前記金属箔１１の第二の面に第二接着剤層１４により内側層となる熱可塑性樹脂層１５が貼り合わされた５層材である。 In the laminate exterior material 1, a heat-resistant resin layer 13 serving as an outer layer is bonded to the first surface of the metal foil 11 by the first adhesive layer 12, and the second adhesive is applied to the second surface of the metal foil 11. This is a five-layer material in which a thermoplastic resin layer 15 serving as an inner layer is bonded to the layer 14.
前記耐熱性樹脂層１３側の面の端部近傍に耐熱性樹脂層１３および第一接着剤層１２が無く金属箔１１が露出する長方形の第一金属箔露出部２１が設けられ、前記熱可塑性樹脂層１５側の面の中央から前記第一金属箔露出部２１と対向する辺側に寄った位置に熱可塑性樹脂層１５および第二接着剤層１４が無く金属箔１１が露出する長方形の第二金属箔露出部２３が設けられている。 A rectangular first metal foil exposed portion 21 where the metal foil 11 is exposed without the heat resistant resin layer 13 and the first adhesive layer 12 is provided near the end of the surface on the heat resistant resin layer 13 side, and the thermoplastic A rectangular second layer in which the metal foil 11 is exposed without the thermoplastic resin layer 15 and the second adhesive layer 14 at a position near the side facing the first metal foil exposed portion 21 from the center of the surface on the resin layer 15 side. A two-metal foil exposed portion 23 is provided.
前記ラミネート外装材１は、図２に参照される下記の方法で作製することができる。
（１）耐熱性樹脂層貼り合わせ工程
前記耐熱性樹脂層１３の一部を切り取り、第一金属箔露出部２１に対応する形状の窓部１３ａを形成する。前記窓部１３ａは耐熱性樹脂層１３を貫通する穴である。前記窓部１３ａは、トムソン刃やピナクル刃等の工具、レーザーカッター、ホットナイフ等により耐熱性樹脂層１３の一部を切断することにより形成する。
The laminate exterior material 1 can be produced by the following method referred to in FIG.
(1) Heat-resistant resin layer bonding step A part of the heat-resistant resin layer 13 is cut out to form a window portion 13 a having a shape corresponding to the first metal foil exposed portion 21. The window portion 13 a is a hole that penetrates the heat resistant resin layer 13. The window portion 13a is formed by cutting a part of the heat-resistant resin layer 13 with a tool such as a Thomson blade or a pinnacle blade, a laser cutter, a hot knife, or the like.
前記窓部１３ａを形成した耐熱性樹脂層１３の片面全域に接着剤を塗布して第一接着剤層１２を形成する。前記窓部１３ａには接着剤が塗布されないので、第一接着剤層１２にも窓部１２ａが形成されて窓部付きの二層体２０が作製される。 The first adhesive layer 12 is formed by applying an adhesive to the entire area of one side of the heat resistant resin layer 13 on which the window portion 13a is formed. Since no adhesive is applied to the window portion 13a, the window portion 12a is formed also in the first adhesive layer 12, and the two-layer body 20 with the window portion is produced.
前記二層体２０の第一接着剤層１２を金属箔１１の第一の面に重ね合わせ、第一接着剤層１２により金属箔１１と耐熱性樹脂層１３を貼り合わせる。 The first adhesive layer 12 of the bilayer body 20 is superposed on the first surface of the metal foil 11, and the metal foil 11 and the heat resistant resin layer 13 are bonded together by the first adhesive layer 12.
前記耐熱性樹脂層１３の窓部１３ａの直下は第一接着剤層１２ａの窓部１２ａであり接着剤が存在しないので、窓部１３ａから金属箔１１が覗いて第一金属箔露出部２１が形成される。
（２）熱可塑性樹脂層貼り合わせ工程
前記熱可塑性樹脂層１５の一部を切り取り、第二金属箔露出部２３に対応する形状の窓部１５ａを形成する。前記窓部１５ａは熱可塑性樹脂層１５を貫通する穴である。窓部１５ａの形成方法は耐熱性樹脂層１３の窓部１３ａの形成方法と同じである。
Immediately below the window portion 13a of the heat-resistant resin layer 13 is the window portion 12a of the first adhesive layer 12a, and no adhesive is present. Therefore, the metal foil 11 is seen through the window portion 13a and the first metal foil exposed portion 21 is formed. It is formed.
(2) Thermoplastic resin layer bonding step A part of the thermoplastic resin layer 15 is cut out to form a window portion 15 a having a shape corresponding to the second metal foil exposed portion 23. The window portion 15 a is a hole that penetrates the thermoplastic resin layer 15. The method for forming the window portion 15 a is the same as the method for forming the window portion 13 a of the heat resistant resin layer 13.
前記窓部１５ａを形成した熱可塑性樹脂層１５の片面全域に接着剤を塗布して第二接着剤層１４を形成する。前記窓部１５ａには接着剤が塗布されないので、第二接着剤層１４にも窓部１４ａが形成されて窓部付きの二層体２２が作製される。 The second adhesive layer 14 is formed by applying an adhesive to the entire area of one surface of the thermoplastic resin layer 15 on which the window portion 15a is formed. Since no adhesive is applied to the window portion 15a, the window portion 14a is also formed in the second adhesive layer 14 to produce a two-layer body 22 with a window portion.
前記二層体２２の第二接着剤層１４を金属箔１１の第二の面に重ね合わせ、第二接着剤層１４により金属箔１１と熱可塑性樹脂層１５を貼り合わせる。 The second adhesive layer 14 of the bilayer body 22 is overlaid on the second surface of the metal foil 11, and the metal foil 11 and the thermoplastic resin layer 15 are bonded together by the second adhesive layer 14.
前記熱可塑性樹脂層１５の窓部１５ａの直下は第二接着剤層１４の窓部１４ａであり接着剤が存在しないので、窓部１５ａから金属箔１１が覗いて第二金属箔露出部２３が形成される。 Immediately below the window portion 15a of the thermoplastic resin layer 15 is the window portion 14a of the second adhesive layer 14, and no adhesive is present. Therefore, the metal foil 11 is seen through the window portion 15a and the second metal foil exposed portion 23 is formed. It is formed.
上記の製造方法において、耐熱性樹脂層貼り合わせ工程と熱可塑性樹脂層貼り合わせ工程の実施順序は限定されないが、接着剤の硬化温度等を考慮すると耐熱性樹脂層貼り合わせ工程を先に行う方が好ましい。すなわち、２種類の二層体２０、２２を作製し、これらの二層体２０、２２を金属箔１１の両面に耐熱性樹脂層１３と第一接着剤層１２の二層体２０、熱可塑性樹脂層１５と第二接着剤層１４の二層体２２の順に貼り合わせ貼り合わせることが好ましい。 In the above manufacturing method, the execution order of the heat-resistant resin layer bonding step and the thermoplastic resin layer bonding step is not limited, but considering the curing temperature of the adhesive, the heat-resistant resin layer bonding step is performed first. Is preferred. That is, two types of two-layer bodies 20 and 22 are produced, and these two-layer bodies 20 and 22 are formed on both surfaces of the metal foil 11 with the two-layer body 20 of the heat-resistant resin layer 13 and the first adhesive layer 12, thermoplastic. The two layers 22 of the resin layer 15 and the second adhesive layer 14 are preferably bonded and bonded together in this order.
上述した窓部付き樹脂層と金属箔の貼り合わせによれば、貼り合わせと同時に金属箔露出部が形成され、少ない工程で容易に金属箔露出部を形成できる。しかも、窓部付き樹脂層に接着剤を塗布し金属箔の金属箔露出部の対応部分には接着剤が塗布されないので、残留接着剤による露出不良も起こらない。貼り合わせ前に樹脂層に窓部を形成する準備作業が必要であるが、窓部の輪郭線を切る作業は、貼り合わせ後にレーザーで樹脂層および接着剤層を焼き切る作業よりも極めて簡単な作業である。また、金属箔露出部の寸法、位置、数の変更は樹脂層に形成する窓部を変更すればよいので、ラミネート外装材の設計変更は容易である。以上より、金属箔露出部を有するラミネート外装材を効率良く製造できる。 According to the bonding of the resin layer with window part and the metal foil described above, the metal foil exposed part is formed at the same time as the bonding, and the metal foil exposed part can be easily formed with fewer steps. In addition, since the adhesive is applied to the resin layer with the window portion and the adhesive is not applied to the corresponding portion of the exposed portion of the metal foil, the exposure failure due to the residual adhesive does not occur. Preparation work to form a window part in the resin layer before bonding is necessary, but cutting the outline of the window part is much easier than burning the resin layer and adhesive layer with a laser after bonding. It is. Further, since the size, position, and number of the exposed metal foil portions may be changed by changing the window portion formed in the resin layer, the design change of the laminate exterior material is easy. As described above, a laminate exterior material having a metal foil exposed portion can be efficiently produced.
ラミネート外装材の外側にあたる金属露出部において、耐熱性樹脂層側の面、熱可塑性樹脂層側の面のどちら側に金属箔露出部が必要であるかは、外装体の形態によって異なる。従って、本発明のラミネート外装材の製造方法は、耐熱性樹脂層貼り合わせ工程および熱可塑性樹脂層貼り合わせ工程のうちの少なくとも一方の工程において、窓部付きの樹脂層に接着剤を塗布して金属箔と貼り合わせる工程を適用する。また、一方の樹脂層に形成される金属箔露出部の数も任意であり、形状や寸法も限定されない。通常、少なくとも熱可塑性樹脂側に金属露出部を設ける場合が多いが、熱可塑性樹脂層側に金属露出部を設けない即ち耐熱性樹脂層側のみに金属露出部を設ける例としてはタブ付き蓄電デバイスの漏電チェック用に窓部(金属露出部)を利用することなどが挙げられる。 Whether the metal foil exposed portion is required on the heat-resistant resin layer side surface or the thermoplastic resin layer side surface in the metal exposed portion corresponding to the outside of the laminate exterior material varies depending on the form of the exterior body. Therefore, in the method for producing a laminate exterior material of the present invention, in at least one of the heat-resistant resin layer laminating step and the thermoplastic resin layer laminating step, an adhesive is applied to the resin layer with a window portion. A process of bonding with metal foil is applied. Moreover, the number of the metal foil exposed parts formed in one resin layer is also arbitrary, and the shape and dimensions are not limited. Usually, there are many cases where a metal exposed portion is provided at least on the thermoplastic resin side, but as an example in which the metal exposed portion is not provided only on the thermoplastic resin layer side, that is, the metal exposed portion is provided only on the heat resistant resin layer side, For example, the use of a window (metal exposed part) for checking for electric leakage is mentioned.
本発明のラミネート外装材は蓄電デバイスの外装体以外に、食品や液体の包装材料としても用いることができる。金属箔露出部の位置、数、寸法は限定されず、ラミネート外装材の用途に応じて任意に設定することができる。図示例のラミネート外装材１は金属箔１１の両面に金属箔露出部２１、２３を形成しているが、両面に金属箔露出部２１、２３を形成することにも限定されず、一方の面のみに形成することもできる。一方の面のみに金属箔露出部を有するラミネート外装材を作製する場合は、金属箔露出部を形成する面の貼り合わせを上述した窓部付き樹脂層を貼り合わせる方法で行い、金属箔露出部を形成しない面の樹脂層の貼り合わせは周知の手法により貼り合わせる。 The laminate exterior material of the present invention can be used as a packaging material for foods and liquids in addition to the exterior body of the electricity storage device. The position, number, and dimensions of the exposed metal foil portion are not limited, and can be arbitrarily set according to the use of the laminate exterior material. In the illustrated laminate outer packaging material 1, the metal foil exposed portions 21 and 23 are formed on both surfaces of the metal foil 11. However, the present invention is not limited to the formation of the metal foil exposed portions 21 and 23 on both surfaces. It can also be formed only. When producing a laminate exterior material having a metal foil exposed portion only on one surface, the surface forming the metal foil exposed portion is bonded by the above-described method of bonding the resin layer with a window portion, and the metal foil exposed portion. Bonding of the resin layer on the surface on which no film is formed is performed by a known method.
食品や液体の包装材料のラミネート外装材の用途の一例として食品容器を挙げることができる。食品容器用ラミネート外装材では、容器の外面である耐熱性樹脂層側の面および内面である熱可塑性樹脂層側の面の両方に金属箔露出部を形成し、この金属箔露出部に発熱体を接触させたり、内容物を介してジュール熱による加熱が行え、これらが可能な食品容器を作製できる。
［蓄電デバイス用電極部材およびその製造方法］
蓄電デバイスにおいては、ラミネート外装材の金属箔を電極として利用することがある。図３の蓄電デバイス用電極部材２はかかる用途に適した部材であり、蓄電デバイスに専用されるラミネート外装材である。
A food container can be mentioned as an example of the use of the laminate outer packaging material of a foodstuff or a liquid packaging material. In the laminated outer packaging material for food containers, a metal foil exposed portion is formed on both the heat resistant resin layer side surface that is the outer surface of the container and the thermoplastic resin layer side surface that is the inner surface, and a heating element is formed on the metal foil exposed portion. Or heating by Joule heat through the contents, and a food container capable of these can be produced.
[Electrode member for power storage device and manufacturing method thereof]
In an electricity storage device, a metal foil of a laminate outer packaging material may be used as an electrode. The electrode member 2 for an electricity storage device in FIG. 3 is a member suitable for such an application, and is a laminate exterior material dedicated to the electricity storage device.
前記蓄電デバイス用電極材２は、金属箔１１の第一の面に第一接着剤層１２により外側層となる耐熱性樹脂層１３が貼り合わされ、端部近傍に耐熱性樹脂層１３および第一接着剤層１２が無く金属箔１１が露出する第一金属箔露出部２１が形成されている。一方、前記金属箔１１の第二の面には中央部にバインダー７４を介して活物質が付与されて活物質部１６が形成され、前記活物質部１６を囲むように第二接着剤層１４が形成されている。そして、前記第二接着剤層１４上に熱可塑性樹脂層１５が積層されている。前記熱可塑性樹脂層１５は第二接着剤層１４上のみに存在し、前記活物質部１６は露出している。 In the electricity storage device electrode material 2, a heat-resistant resin layer 13 serving as an outer layer is bonded to a first surface of a metal foil 11 by a first adhesive layer 12, and the heat-resistant resin layer 13 and the first layer are disposed in the vicinity of the end portion. A first metal foil exposed portion 21 is formed in which the metal foil 11 is exposed without the adhesive layer 12. On the other hand, an active material portion 16 is formed on the second surface of the metal foil 11 through a binder 74 at the center portion to form an active material portion 16, and the second adhesive layer 14 surrounds the active material portion 16. Is formed. A thermoplastic resin layer 15 is laminated on the second adhesive layer 14. The thermoplastic resin layer 15 exists only on the second adhesive layer 14, and the active material portion 16 is exposed.
前記蓄電デバイス用電極部材２が正極部材であるときは、前記金属箔１１を正極となる金属箔で構成し、活物質部１６を正極活物質部で構成する。同様に、前記蓄電デバイス用電極部材２が負極部材であるときは、前記金属箔１１を負極となる金属箔で構成し、活物質部１６を負極活物質部で構成する。 When the electricity storage device electrode member 2 is a positive electrode member, the metal foil 11 is constituted by a metal foil serving as a positive electrode, and the active material portion 16 is constituted by a positive electrode active material portion. Similarly, when the electricity storage device electrode member 2 is a negative electrode member, the metal foil 11 is constituted by a metal foil serving as a negative electrode, and the active material portion 16 is constituted by a negative electrode active material portion.
前記蓄電デバイス用電極部材２は、図４に参照される下記の方法で作製することができる。
（１）耐熱性樹脂層貼り合わせ工程
本工程は前記ラミネート外装材１の耐熱性樹脂層貼り合わせ工程と同じである。
The said electrode member 2 for electrical storage devices can be produced with the following method referred to FIG.
(1) Heat-resistant resin layer bonding step This step is the same as the heat-resistant resin layer bonding step of the laminate exterior material 1.
即ち、前記耐熱性樹脂層１３の一部を切り取り、第一金属箔露出部２１に対応する形状の窓部１３ａを形成し、前記窓部１３ａを形成した耐熱性樹脂層１３の片面全域に接着剤を塗布して第一接着剤層１２を形成し、窓部付きの二層体２０を作製する。前記二層体２０を金属箔１１の第一の面に重ね合わせ、第一接着剤層１２により金属箔１１と耐熱性樹脂層１３を貼り合わせる。 That is, a part of the heat-resistant resin layer 13 is cut off to form a window portion 13a having a shape corresponding to the first metal foil exposed portion 21, and bonded to the entire area of one surface of the heat-resistant resin layer 13 on which the window portion 13a is formed. The first adhesive layer 12 is formed by applying an agent, and a two-layer body 20 with a window portion is produced. The bilayer body 20 is overlaid on the first surface of the metal foil 11, and the metal foil 11 and the heat resistant resin layer 13 are bonded together by the first adhesive layer 12.
前記耐熱性樹脂層１３の窓部１３ａの直下は接着剤が存在しないので、窓部１３ａから金属箔１１が覗いて第二金属箔露出部２１が形成される。
（２）活物質付与工程
前記金属箔１１の第二の面の所要位置に、バインダー７４とペースト状に調製した活物質を塗工して活物質部１６を形成する。本発明においてバインダー７４は必須の層ではないが、金属箔１１と活物質部１６との密着性を高めるためにバインダー７４を介在させることが好ましい。
（３）熱可塑性樹脂層貼り合わせ工程
前記熱可塑性樹脂層１５の一部を切り取り、活物質部１６に対応する形状の窓部１５ａを形成する。前記窓部１５ａは熱可塑性樹脂層１５を貫通する穴である。前記窓部１５ａを形成した熱可塑性樹脂層１５の片面全域に接着剤を塗布して第二接着剤層１４を形成する。前記窓部１５ａには接着剤が塗布されないので、第二接着剤層１４にも窓部１４ａが形成されて窓部付きの二層体２２となる。
Since there is no adhesive immediately below the window portion 13a of the heat-resistant resin layer 13, the metal foil 11 is viewed from the window portion 13a, and the second metal foil exposed portion 21 is formed.
(2) Active material application | coating process The active material part 16 is formed by apply | coating the binder 74 and the active material prepared in the paste form in the required position of the 2nd surface of the said metal foil 11. FIG. In the present invention, the binder 74 is not an essential layer, but it is preferable to interpose the binder 74 in order to improve the adhesion between the metal foil 11 and the active material portion 16.
(3) Thermoplastic resin layer bonding step A part of the thermoplastic resin layer 15 is cut out to form a window portion 15 a having a shape corresponding to the active material portion 16. The window portion 15 a is a hole that penetrates the thermoplastic resin layer 15. The second adhesive layer 14 is formed by applying an adhesive to the entire area of one surface of the thermoplastic resin layer 15 on which the window portion 15a is formed. Since no adhesive is applied to the window portion 15a, the window portion 14a is also formed in the second adhesive layer 14 to form a two-layer body 22 with a window portion.
前記二層体２２の第二接着剤層１４を金属箔１１の第二の面に重ね合わせ、第二接着剤層１４により金属箔１１と熱可塑性樹脂層１５を貼り合わせる。 The second adhesive layer 14 of the bilayer body 22 is overlaid on the second surface of the metal foil 11, and the metal foil 11 and the thermoplastic resin layer 15 are bonded together by the second adhesive layer 14.
前記熱可塑性樹脂層１５の窓部１５ａの直下は接着剤が存在しないので、窓部１５ａから活物質部１６が覗いて該活物質部１６が露出する。図示例の蓄電デバイス用電極部材２は、窓部１５ａと活物質部１６とが同一寸法でかつ位置が完全に一致して両者の端面が付き合わされているが、活物質部１６を完全に露出させる必要はなく熱可塑性樹脂層１５が活物質部１６の一部に被さっていても支障はない。例えば、窓部１５ａの寸法を活物質部１６よりも少し小さくして活物質部１６の縁に熱可塑性樹脂層１５が被さるように設計してもよい。 Since there is no adhesive immediately below the window portion 15a of the thermoplastic resin layer 15, the active material portion 16 is exposed through the window portion 15a, and the active material portion 16 is exposed. In the electrode member 2 for the electricity storage device of the illustrated example, the window portion 15a and the active material portion 16 have the same dimensions and the positions are completely coincided with each other, and the end surfaces of both are attached, but the active material portion 16 is completely exposed. There is no problem even if the thermoplastic resin layer 15 covers a part of the active material portion 16. For example, the size of the window portion 15 a may be slightly smaller than the active material portion 16, and the thermoplastic resin layer 15 may be designed to cover the edge of the active material portion 16.
前記耐熱性樹脂層貼り合わせ工程によれば、前記ラミネート外装材１の耐熱性樹脂層貼り合わせ工程と同じく、貼り合わせと同時に金属箔露出部２１を形成することができる。また、前記熱可塑性樹脂層貼り合わせ工程によれば、貼り合わせと同時に熱可塑性樹脂層１５側の面に活物質部１６を露出させることができる。前記金属箔露出部２１の形成方法と同じく、活物質部１６には接着剤が付与されないので、残留接着剤による露出不良も起こらない。貼り合わせ前に樹脂層に窓部を形成する準備作業が必要であるが、窓部の輪郭線を切る作業は、貼り合わせ後にレーザーで樹脂層および接着剤層を焼き切る作業よりも極めて簡単な作業であり、少ない工程で容易に活物質部１６を露出させることができる。以上より、金属箔露出部２１を有し活物質部１６が露出する蓄電デバイス用電極部材２を効率良く製造できる。 According to the heat-resistant resin layer bonding step, the metal foil exposed portion 21 can be formed simultaneously with the bonding, as in the heat-resistant resin layer bonding step of the laminate exterior material 1. Moreover, according to the said thermoplastic resin layer bonding process, the active material part 16 can be exposed to the surface at the side of the thermoplastic resin layer 15 simultaneously with bonding. Similar to the method of forming the metal foil exposed portion 21, no adhesive is applied to the active material portion 16, so that exposure failure due to the residual adhesive does not occur. Preparation work to form a window part in the resin layer before bonding is necessary, but cutting the outline of the window part is much easier than burning the resin layer and adhesive layer with a laser after bonding. Therefore, the active material portion 16 can be easily exposed with a small number of steps. As mentioned above, the electrode member 2 for electrical storage devices which has the metal foil exposed part 21 and which the active material part 16 exposes can be manufactured efficiently.
上記の製造方法において、耐熱性樹脂層貼り合わせ工程と熱可塑性樹脂層貼り合わせ工程の実施順序は限定されないが、接着剤の硬化温度等を考慮すると耐熱性樹脂層の工程を先に行う方が好ましい。また、まず活物質付与工程を実施し、その一方で２種類の二層体２０、２２を作製し、これらの二層体２０、２１を金属箔１１に貼り合わせることもできる。 In the above manufacturing method, the execution order of the heat-resistant resin layer bonding step and the thermoplastic resin layer bonding step is not limited, but considering the curing temperature of the adhesive, it is better to perform the heat-resistant resin layer step first. preferable. Moreover, an active material provision process is implemented first, On the other hand, two types of two-layer bodies 20 and 22 can be produced, and these two-layer bodies 20 and 21 can also be bonded together to the metal foil 11. FIG.
なお、図３の蓄電デバイス用電極部材２は、図２に示した方法でラミネート外装材１を作製し、第二金属箔露出部２３にバインダー７４と活物質部１６を形成することによっても作製することができる。
［蓄電デバイスおよびその製造方法］
（第一の蓄電デバイスおよびその製造方法）
図５に、前記ラミネート外装材１で外装体３０を作製した蓄電デバイス３を示す。この蓄電デバイス３は、ラミネート外装材１の金属箔１１を電気の導通部として利用して電気の授受を行う、タブリードを持たないデバイスである。
The electrode member 2 for an electricity storage device in FIG. 3 is also produced by producing the laminate outer packaging material 1 by the method shown in FIG. 2 and forming the binder 74 and the active material part 16 on the second metal foil exposed part 23. can do.
[Power storage device and manufacturing method thereof]
(First power storage device and manufacturing method thereof)
FIG. 5 shows an electricity storage device 3 in which an exterior body 30 is made of the laminate exterior material 1. The electricity storage device 3 is a device that does not have a tab lead and transfers electricity by using the metal foil 11 of the laminate exterior material 1 as an electrical conduction portion.
なお、図３はラミネート外装材１の第一接着剤層１２および第二接着剤層１４の図示を省略している。 In FIG. 3, illustration of the first adhesive layer 12 and the second adhesive layer 14 of the laminate exterior material 1 is omitted.
前記蓄電デバイス３は、外装体３０が、凹部４１を有する本体４０とこの本体４０に被せるフラットな蓋体５０とからなり、それぞれが前記ラミネート外装材１を用いて作製されている。 In the electricity storage device 3, the exterior body 30 includes a main body 40 having a recess 41 and a flat lid body 50 that covers the main body 40, and each is manufactured using the laminate exterior material 1.
前記本体４０は、フラットシートのラミネート外装材１に張り出し成形や絞り成形等の加工を施すことにより、収納室６０となる平面視長方形の凹部４１を成形し、凹部４１の４辺の開口縁から外方にほぼ水平に延びるフランジ４２を有している。前記凹部４１の底壁の内側、即ち、熱可塑性樹脂層１５側の面に金属箔１１が露出する第一内側導通部４３が形成されている。また、４辺のフランジ４２のうちの一つのフランジ４２の外面、即ち耐熱性樹脂層１３に金属箔１１が露出する第一外側導通部４４が設けられている。 The main body 40 forms a rectangular concave portion 41 as a storage chamber 60 by subjecting a flat sheet laminate exterior material 1 to processing such as overhanging or drawing, and from the opening edges on the four sides of the concave portion 41. There is a flange 42 extending substantially horizontally outward. A first inner conductive portion 43 where the metal foil 11 is exposed is formed on the inner side of the bottom wall of the recess 41, that is, on the surface on the thermoplastic resin layer 15 side. In addition, a first outer conducting portion 44 is provided through which the metal foil 11 is exposed on the outer surface of one of the four flanges 42, that is, the heat resistant resin layer 13.
前記本体４０は、まず所要位置に金属箔露出部２１、２３を有するラミネート外装材１を上述した工程で作製し、作製したラミネート外装材１に凹部４１を成形し、トリミングすることにより作製される。ラミネート外装材１の第一金属露出部２１および第二金属箔露出部２３は、それぞれ前記本体４０の第一外側導通部４４および第一内側導通部に４３に対応する。 The main body 40 is manufactured by first manufacturing the laminate outer packaging material 1 having the metal foil exposed portions 21 and 23 at the required positions by the above-described process, forming the recess 41 in the manufactured laminate outer packaging material 1 and trimming. . The first metal exposed portion 21 and the second metal foil exposed portion 23 of the laminate exterior material 1 correspond to the first outer conductive portion 44 and the first inner conductive portion 43 of the main body 40, respectively.
前記蓋体５０は本体４０の平面寸法と同寸であり、組み立て時に収納室６０内において前記第一内側導通部４３に対向する位置、即ち熱可塑性樹脂層１５側の面に金属箔１１が露出する第二内側導通部５１が形成されている。また、前記蓋体５０の外面である耐熱性樹脂層１３側の面に金属箔１１が露出する第二外側導通部５２が設けられている。 The lid 50 has the same size as the plane of the main body 40, and the metal foil 11 is exposed at a position facing the first inner conducting portion 43 in the storage chamber 60 during assembly, that is, on the surface on the thermoplastic resin layer 15 side. A second inner conducting portion 51 is formed. Further, a second outer conductive portion 52 where the metal foil 11 is exposed is provided on a surface on the heat resistant resin layer 13 side which is an outer surface of the lid body 50.
前記蓋体５０は、まず所要位置に金属箔露出部２１、２３を有するラミネート外装材１を上述した工程で作製し、作製したラミネート外装材１をトリミングして寸法を調えることにより作製される。ラミネート外装材１の第一金属露出部２１および第二金属箔露出部２３は、それぞれ前記蓋体５０の第二外側導通部５２および第二内側導通部５１に対応する。 The lid body 50 is manufactured by first manufacturing the laminate exterior material 1 having the metal foil exposed portions 21 and 23 at the required positions by the above-described steps, and trimming the manufactured laminate exterior material 1 to adjust the dimensions. The first metal exposed portion 21 and the second metal foil exposed portion 23 of the laminate exterior material 1 correspond to the second outer conductive portion 52 and the second inner conductive portion 51 of the lid 50, respectively.
電極本体７０は、正極箔７１と負極箔７２との間にセパレーター７３を配置して捲回して積層した積層体である。 The electrode body 70 is a laminated body in which a separator 73 is disposed between a positive foil 71 and a negative foil 72 and wound and laminated.
前記蓄電デバイス３は、収納室６０に電極本体７０を装填し、本体４０の第一内側導通部４３にバインダー７４を介して電池要素７０の正極箔７１の端部を接続するとともに、蓋体５０の第二内側導通部５１にバインダー７４を介して負極箔７２の端部を接続し、電解質を注入して収納室６０の周囲、即ち本体４０のフランジ４２の熱可塑性樹脂層１５と前記フランジ４２に接触する蓋体５０の熱可塑性樹脂層１５をヒートシール接合して熱封止部６１を形成することにより作製される。 The electricity storage device 3 is loaded with the electrode body 70 in the storage chamber 60, the end of the positive foil 71 of the battery element 70 is connected to the first inner conducting portion 43 of the body 40 via the binder 74, and the lid body 50. The end of the negative electrode foil 72 is connected to the second inner conductive portion 51 via a binder 74, and an electrolyte is injected to surround the housing chamber 60, that is, the thermoplastic resin layer 15 of the flange 42 of the main body 40 and the flange 42. It is produced by heat-sealing and joining the thermoplastic resin layer 15 of the lid body 50 in contact with the heat-shielding portion 61.
前記蓄電デバイス３は、収納室６０内においては正極箔７１が第一内側導通部４３で本体４０の金属箔１１に導通し、外装体３０の外面においては第一外側導通部４４で外部との導通を得る。同様に、収納室６０内においては負極箔７２が第二内側導通部５１で蓋体５０の金属箔１１に導通し、外装体３０の外面においては第二外側導通部５２で外部との導通を得る。そして、前記蓄電デバイス３は外装体３０外面の第一外側導通部４４および第二外側導通部５２を通じて電気の授受を行う。 In the storage device 60, the positive foil 71 is electrically connected to the metal foil 11 of the main body 40 by the first inner conductive portion 43 in the storage chamber 60, and the first outer conductive portion 44 is connected to the outside on the outer surface of the exterior body 30. Get continuity. Similarly, in the storage chamber 60, the negative electrode foil 72 is electrically connected to the metal foil 11 of the lid 50 by the second inner conductive portion 51, and the second outer conductive portion 52 is electrically connected to the outside on the outer surface of the exterior body 30. obtain. The electricity storage device 3 transmits and receives electricity through the first outer conductive portion 44 and the second outer conductive portion 52 on the outer surface of the exterior body 30.
外装体用のラミネート外装材は収納室内の導通部として熱可塑性樹脂層側に金属箔露出部を有していることが必須条件であるが、外装体外面の導通部を耐熱性樹脂層側の面に設けることには限定されない。熱可塑性樹脂層側の面の一部が外面に現れる形状の外装体では熱可塑性樹脂層側の面に形成した金属箔露出部を外面の導通部として利用できる。例えば、２枚のラミネート外装材を端部をずらして重ねると熱可塑性樹脂層が外装体の外面に現れる。また、ラミネート外装材の端部を折り返すことでも熱可塑性樹脂層が外装体の外面に現れる。従って、熱可塑性樹脂層側の面に外装体の外側導通部を形成するラミネート外装材は、熱可塑性樹脂層に外側導通部用の窓部および内側導通部用の窓部を形成し、この窓部付き熱可塑性樹脂層に接着剤を塗布して金属箔と貼り合わせることにより作製する。 The laminated exterior material for the exterior body is required to have a metal foil exposed portion on the thermoplastic resin layer side as a conductive portion in the storage chamber, but the conductive portion on the outer surface of the exterior body is on the heat resistant resin layer side. It is not limited to providing on the surface. In an exterior body having a shape in which a part of the surface on the thermoplastic resin layer side appears on the outer surface, the exposed metal foil portion formed on the surface on the thermoplastic resin layer side can be used as the conductive portion on the outer surface. For example, when two laminated exterior materials are stacked with their end portions shifted, a thermoplastic resin layer appears on the outer surface of the exterior body. The thermoplastic resin layer also appears on the outer surface of the exterior body by folding back the end of the laminate exterior material. Therefore, the laminate exterior material for forming the outer conductive portion of the exterior body on the surface on the thermoplastic resin layer side forms the window portion for the outer conductive portion and the window portion for the inner conductive portion on the thermoplastic resin layer. It is produced by applying an adhesive to the thermoplastic resin layer with part and bonding it to a metal foil.
上述した蓄電デバイスの製造方法は、外装体を構成する２枚のラミネート外装材のうちの少なくとも一方を上述した本発明の方法で作製することが要件である。また、ラミネート外装材の製造に際しては、収納室内の金属箔露出部および外装体外面の金属露出部の両方を上述した窓部付き樹脂層と金属層の貼り合わせによって形成することが好ましいが、どちらか一方の金属箔露出部を窓部付き樹脂層と金属層の貼り合わせによって形成し、他方の金属箔露出部を他の方法によって形成する場合も本発明の技術的範囲に含まれる。
（第２の蓄電デバイスおよびその製造方法）
図６の蓄電デバイス４は、図３の２枚の蓄電デバイス用電極部材２を正極部材８０および負極部材８１として用い、これらで外装体３１を形成するとともに、それぞれの金属箔１１を正極および負極として利用する薄型デバイスである。なお、図６は蓄電デバイス用電極材２の第一接着剤層１２、第二接着剤層１４およびバインダー７４の図示を省略している。
The above-described method for manufacturing an electricity storage device requires that at least one of the two laminated exterior materials constituting the exterior body be produced by the above-described method of the present invention. Further, in the production of the laminate exterior material, it is preferable to form both the exposed metal foil portion in the storage chamber and the exposed metal portion on the outer surface of the exterior body by laminating the above-described resin layer with a window portion and the metal layer. The case where one of the exposed portions of the metal foil is formed by bonding the resin layer with a window portion and the metal layer and the other exposed portion of the metal foil is formed by another method is also included in the technical scope of the present invention.
(Second power storage device and manufacturing method thereof)
The power storage device 4 in FIG. 6 uses the two power storage device electrode members 2 in FIG. 3 as the positive electrode member 80 and the negative electrode member 81 to form the outer package 31, and the metal foil 11 is used as the positive electrode and the negative electrode. As a thin device. In FIG. 6, the first adhesive layer 12, the second adhesive layer 14, and the binder 74 of the electricity storage device electrode material 2 are not shown.
前記蓄電デバイス用電極部材２の活物質部１６は正極部材８０の正極活物質部７６および負極部材８１の負極活物質部７７に対応する。また、前記蓄電デバイス用電極部材２の第一金属箔露出部２１、即ち耐熱性樹脂層１３側の面に設けられた金属箔露出部は正極部材８１の第一外側導通部１０３および負極部材８０の第二外側導通部１０５に対応する。 The active material portion 16 of the electrode member 2 for the electricity storage device corresponds to the positive electrode active material portion 76 of the positive electrode member 80 and the negative electrode active material portion 77 of the negative electrode member 81. The first metal foil exposed portion 21 of the electricity storage device electrode member 2, that is, the metal foil exposed portion provided on the surface on the heat resistant resin layer 13 side, is the first outer conductive portion 103 of the positive electrode member 81 and the negative electrode member 80. This corresponds to the second outer conductive portion 105 of the second.
前記蓄電デバイス４は、前記正極部材８０の正極活物質部７６と負極部材８１の負極活物質部７７とでセパレーター７３を挟み、電解質とともに正極部材８０の熱可塑性樹脂層１５と負極部材８１の熱可塑性樹脂層１５をヒートシール接合して熱封止部６３を形成することにより作製することができる。 In the electricity storage device 4, the separator 73 is sandwiched between the positive electrode active material portion 76 of the positive electrode member 80 and the negative electrode active material portion 77 of the negative electrode member 81, and the heat of the thermoplastic resin layer 15 of the positive electrode member 80 and the negative electrode member 81 together with the electrolyte. It can be manufactured by heat-sealing the plastic resin layer 15 to form the heat-sealed portion 63.
前記蓄電デバイス４は外装体３１の外面において第一外側導通部１０３および第二外側導通部１０５において電気の授受を行う。 The electricity storage device 4 transmits and receives electricity at the first outer conductive portion 103 and the second outer conductive portion 105 on the outer surface of the exterior body 31.
前記蓄電デバイス４は外装体３１外面の導通部（金属箔露出部）を耐熱性樹脂層１３側の面に設けているが、前記蓄電デバイス３と同じく、正極部材８０と負極部材８１の端部をずらして重ねるかあるいは端部を折り返すことにより熱可塑性樹脂層１５の一部を外装体の外面に現すことができるので、熱可塑性樹脂層１５側の面に導通部を設けることができる。従って、蓄電デバイス用電極材は、熱可塑性樹脂層が貼り合わされる金属箔の第二の面に活物質部が設けられ、金属箔の第一の面および第二の面のうちの一方に外面導通用の金属箔露出部が設けられる。 The electricity storage device 4 is provided with a conductive portion (metal foil exposed portion) on the outer surface of the outer package 31 on the surface on the heat resistant resin layer 13 side. Since a part of the thermoplastic resin layer 15 can be exposed on the outer surface of the exterior body by overlapping and shifting the ends, the conducting portion can be provided on the surface on the thermoplastic resin layer 15 side. Therefore, the electrode material for the electricity storage device is provided with an active material portion on the second surface of the metal foil to which the thermoplastic resin layer is bonded, and an outer surface on one of the first surface and the second surface of the metal foil. A conductive metal foil exposed portion is provided.
上述した熱可塑性樹脂層側の面に外側導通部を形成する蓄電デバイス用電極部材は、熱可塑性樹脂層に外側導通部用の窓部および活物質部露出用の窓部を形成し、この窓部付き熱可塑性樹脂層に接着剤を塗布して金属箔と貼り合わせることにより作製する。 The electrode member for an electricity storage device that forms the outer conductive portion on the surface on the thermoplastic resin layer side described above forms a window portion for the outer conductive portion and a window portion for exposing the active material portion on the thermoplastic resin layer. It is produced by applying an adhesive to the thermoplastic resin layer with part and bonding it to a metal foil.
本発明の蓄電デバイス用電極部材の製造方法は、活物質部の露出および外面導通用の金属箔露出部の形成のうちも少なくとも一方を窓部付き樹脂層の貼り合わせによって行うことが好ましいが、どちらか一方を窓部付き樹脂層と金属層の貼り合わせによって形成し、他方を他の方法によって形成する場合も本発明の技術的範囲に含まれる。さらには、正極部材および負極部材のうちの一方の電極部材を本発明の蓄電デバイス用電極部材の製造方法により作製し、他方の電極部材を他の方法で作成する場合も本発明の蓄電デバイスの製造方法の技術的範囲に含まれる。 In the method for producing an electrode member for an electricity storage device of the present invention, it is preferable to perform at least one of the exposure of the active material part and the formation of the metal foil exposed part for outer surface conduction by laminating a resin layer with a window part, The case where either one is formed by bonding a resin layer with a window part and a metal layer and the other is formed by another method is also included in the technical scope of the present invention. Further, when one electrode member of the positive electrode member and the negative electrode member is produced by the method for producing an electrode member for an electricity storage device of the present invention and the other electrode member is produced by another method, the electricity storage device of the present invention is also used. It is included in the technical scope of the manufacturing method.
［ラミネート外装材、蓄電デバイス用電極部材および蓄電デバイスの構成材料］
本発明はラミネート外装材、蓄電デバイス用電極部材および蓄電デバイスの材料を限定するものではないが、好ましい材料として以下の材料を挙げることができる。
（金属箔）
前記金属箔１１は、ラミネート外装材１および蓄電デバイス用電極部材２に酸素や水分の侵入を阻止するガスバリア性を付与する役割を担うものである。また、金属箔１１を導通部としてとして利用する場合は、導電性の良い金属箔を使用する。例えば、アルミニウム箔、銅箔、ニッケル箔、ステンレス箔、あるいはこれのクラッド箔、これらの焼鈍箔または未焼鈍箔等が挙げられる。また、ニッケル、錫、銅、クロム等の導電性金属でめっきした金属箔、たとえばめっきしたアルミニウム箔を用いることも好ましい。また、前記金属箔１１の厚さは７〜１５０μｍが好ましい。
[Laminate exterior material, electrode member for power storage device, and constituent material of power storage device]
Although this invention does not limit the material of a laminate exterior material, the electrical storage device electrode member, and an electrical storage device, the following materials can be mentioned as a preferable material.
(Metal foil)
The metal foil 11 plays a role of providing a gas barrier property for preventing the entry of oxygen and moisture to the laminate outer packaging material 1 and the electrode member 2 for an electricity storage device. Moreover, when utilizing the metal foil 11 as a conduction | electrical_connection part, metal foil with favorable electroconductivity is used. For example, an aluminum foil, a copper foil, a nickel foil, a stainless steel foil, or a clad foil thereof, an annealed foil or an unannealed foil thereof can be used. It is also preferable to use a metal foil plated with a conductive metal such as nickel, tin, copper, or chromium, for example, a plated aluminum foil. The thickness of the metal foil 11 is preferably 7 to 150 μm.
また、前記金属箔１１には化成皮膜が形成されているのが好ましい。前記化成皮膜は、金属箔の表面に化成処理を施すことによって形成される皮膜であり、このような化成処理が施されていることによって、内容物（電解液等）による金属箔表面の腐食を十分に防止できる。例えば、次のような処理を行うことによって、金属箔に化成処理を施す。即ち、脱脂処理を行った金属箔の表面に、
１）リン酸と、
クロム酸と、
フッ化物の金属塩およびフッ化物の非金属塩からなる群より選ばれる少なくとも１種の化合物と、を含む混合物の水溶液
２）リン酸と、
アクリル系樹脂、キトサン誘導体樹脂およびフェノール系樹脂からなる群より選ばれる少なくとも１種の樹脂と、
クロム酸およびクロム（III）塩からなる群より選ばれる少なくとも１種の化合物と、を含む混合物の水溶液
３）リン酸と、
アクリル系樹脂、キトサン誘導体樹脂およびフェノール系樹脂からなる群より選ばれる少なくとも１種の樹脂と、
クロム酸およびクロム（III）塩からなる群より選ばれる少なくとも１種の化合物と、
フッ化物の金属塩およびフッ化物の非金属塩からなる群より選ばれる少なくとも１種の化合物と、を含む混合物の水溶液
上記１）〜３）のうちのいずれかの水溶液を金属箔の表面に塗工した後、乾燥することにより、化成処理を施す。
The metal foil 11 is preferably formed with a chemical conversion film. The chemical conversion film is a film formed by performing a chemical conversion treatment on the surface of the metal foil, and by performing such chemical conversion treatment, corrosion of the metal foil surface by the contents (electrolytic solution, etc.) is caused. Can be sufficiently prevented. For example, the chemical conversion treatment is performed on the metal foil by performing the following treatment. That is, on the surface of the metal foil that has been degreased,
1) phosphoric acid;
Chromic acid,
An aqueous solution of a mixture comprising at least one compound selected from the group consisting of a metal salt of fluoride and a non-metal salt of fluoride; 2) phosphoric acid;
At least one resin selected from the group consisting of acrylic resins, chitosan derivative resins and phenolic resins;
An aqueous solution of a mixture comprising at least one compound selected from the group consisting of chromic acid and a chromium (III) salt, 3) phosphoric acid,
At least one resin selected from the group consisting of acrylic resins, chitosan derivative resins and phenolic resins;
At least one compound selected from the group consisting of chromic acid and a chromium (III) salt;
An aqueous solution of a mixture comprising at least one compound selected from the group consisting of a metal salt of fluoride and a nonmetal salt of fluoride, and coating the surface of the metal foil with any one of the above aqueous solutions 1) to 3) After the process, chemical conversion treatment is performed by drying.
前記化成皮膜は、クロム付着量（片面当たり）として０．１ｍｇ／ｍ２〜５０ｍｇ／ｍ２が好ましく、特に２ｍｇ／ｍ２〜２０ｍｇ／ｍ２が好ましい。
（耐熱性樹脂層）
耐熱性樹脂層１３を構成する耐熱性樹脂としては、熱封止する際の熱封止温度で溶融しない耐熱性樹脂を用いる。前記耐熱性樹脂としては、前記熱可塑性樹脂層１５を構成する熱可塑性樹脂の融点より１０℃以上高い融点を有する耐熱性樹脂を用いるのが好ましく、熱可塑性樹脂の融点より２０℃以上高い融点を有する耐熱性樹脂を用いるのが特に好ましい。例えば、延伸ポリアミドフィルム（延伸ナイロンフィルム等）または延伸ポリエステルフィルムを用いるのが好ましい。中でも、二軸延伸ポリアミドフィルム（二軸延伸ナイロンフィルム等）、二軸延伸ポリブチレンテレフタレート（ＰＢＴ）フィルム、二軸延伸ポリエチレンテレフタレート（ＰＥＴ）フィルムまたは二軸延伸ポリエチレンナフタレート（ＰＥＮ）フィルムを用いるのが特に好ましい。なお、前記耐熱性樹脂層１３は単層で形成されていても良いし、或いは、例えば延伸ポリエステルフィルム／延伸ポリアミドフィルムからなる複層（延伸ＰＥＴフィルム／延伸ナイロンフィルムからなる複層等）で形成されていても良い。前記耐熱性樹脂層１３の厚さは２０μｍ〜１００μｍが好ましい。
The conversion coating, chromium coating weight preferably is 0.1mg / m 2 ~50mg / m 2 as a (per one surface), in particular 2mg / m 2 ~20mg / m 2 preferred.
(Heat resistant resin layer)
As the heat resistant resin constituting the heat resistant resin layer 13, a heat resistant resin that does not melt at the heat sealing temperature at the time of heat sealing is used. As the heat resistant resin, it is preferable to use a heat resistant resin having a melting point higher by 10 ° C. or higher than the melting point of the thermoplastic resin constituting the thermoplastic resin layer 15, and having a melting point higher by 20 ° C. or higher than the melting point of the thermoplastic resin. It is particularly preferable to use a heat resistant resin having the same. For example, it is preferable to use a stretched polyamide film (stretched nylon film or the like) or a stretched polyester film. Among them, a biaxially stretched polyamide film (such as a biaxially stretched nylon film), a biaxially stretched polybutylene terephthalate (PBT) film, a biaxially stretched polyethylene terephthalate (PET) film, or a biaxially stretched polyethylene naphthalate (PEN) film is used. Is particularly preferred. The heat-resistant resin layer 13 may be formed as a single layer or, for example, a multilayer composed of a stretched polyester film / stretched polyamide film (a multilayer composed of a stretched PET film / stretched nylon film). May be. The thickness of the heat-resistant resin layer 13 is preferably 20 μm to 100 μm.
また、前記耐熱性樹脂層１３を貼り合わせる第一接着剤層１２を構成する接着剤は、ポリエステルウレタン系接着剤およびポリエーテルウレタン系接着剤からなる群より選ばれる少なくとも１種の接着剤を用いるのが好ましい。前記第一接着剤層１２の厚さは、０．５μｍ〜５μｍに設定されるのが好ましい。
（熱可塑性樹脂層）
熱可塑性樹脂層１５を構成する熱可塑性樹脂は、ポリエチレン、ポリプロピレン、オレフィン系共重合体、これらの酸変性物およびアイオノマーからなる群より選ばれた少なくとも１種の熱可塑性樹脂からなる未延伸フィルムにより構成されるのが好ましい。前記熱可塑性樹脂層１５の厚さは２０μｍ〜１５０μｍに設定されるのが好ましい。
Moreover, the adhesive which comprises the 1st adhesive bond layer 12 which bonds the said heat resistant resin layer 13 uses the at least 1 sort (s) of adhesive chosen from the group which consists of a polyester urethane type adhesive agent and a polyether urethane type adhesive agent. Is preferred. The thickness of the first adhesive layer 12 is preferably set to 0.5 μm to 5 μm.
(Thermoplastic resin layer)
The thermoplastic resin constituting the thermoplastic resin layer 15 is an unstretched film made of at least one thermoplastic resin selected from the group consisting of polyethylene, polypropylene, olefin copolymers, acid-modified products thereof, and ionomers. Preferably it is configured. The thickness of the thermoplastic resin layer 15 is preferably set to 20 μm to 150 μm.
また、前記熱可塑性樹脂層１５を貼り合わせる第二接着剤層１４を構成する接着剤は、フィン系接着剤により形成された層であるのが好ましい。２液硬化型のオレフィン系接着剤を用いた場合には、電解液による膨潤で接着性が低下するのを十分に防止できる。前記第二接着剤層１４の厚さは、０．５μｍ〜５μｍに設定されるのが好ましい。
（活物質部）
前記電池要素７５において、正極活物質部７６は、例えば、ＰＶＤＦ（ポリフッ化ビニリデン）、ＳＢＲ（スチレンブタジエンゴム）、ＣＭＣ（カルボキシメチルセルロースナトリウム塩など）、ＰＡＮ（ポリアクリロニトリル）等のバインダーに、塩（例えば、コバルト酸リチウム、ニッケル酸リチウム、リン酸鉄リチウム、マンガン酸リチウム等）を添加した混合組成物などで形成される。前記正極活物質部７６の厚さは、２μｍ〜３００μｍに設定されるのが好ましい。さらに、前記正極活物質部７６には、カーボンブラック、ＣＮＴ（カーボンナノチューブ）等の導電補助剤を含有させてもよい。また、負極活物質部７７として、例えば、ＰＶＤＦ、ＳＢＲ、ＣＭＣ、ＰＡＮ等のバインダーに、添加物（例えば、黒鉛、チタン酸リチウム、Ｓｉ系合金、スズ系合金等）を添加した混合組成物等で形成される。前記負極活物質部７７の厚さは、１μｍ〜３００μｍに設定されるのが好ましい。さらに、前記負極活物質部７７には、カーボンブラック、ＣＮＴ（カーボンナノチューブ）等の導電補助剤を含有させてもよい。
せしめてもよい。
（電極本体）
前記電極本体７０において、正極箔７１は厚さ７〜５０μｍの硬質または軟質のアルミニウム箔が好ましく用いられ、負極箔７２は厚さ７〜５０μｍの銅箔が好ましく用いられ、他にアルミニウム箔やチタン箔、ステンレス箔を使用することができる。
（セパレーター）
また、セパレーター７３としては、ポリエチレン製セパレーター、ポリプロピレン製セパレーター、ポリエチレンフィルムとポリプロピレンフィルムとからなる複層フィルムで形成されるセパレーター、あるいはこれの樹脂製セパレーターにセラミック等の耐熱無機物を塗布した湿式または乾式の多孔質フィルムで構成されるセパレーター等が挙げられる。前記セパレーター７３の厚さは、５μｍ〜５０μｍに設定されるのが好ましい。
Moreover, it is preferable that the adhesive which comprises the 2nd adhesive bond layer 14 which bonds the said thermoplastic resin layer 15 is a layer formed with the fin type adhesive. In the case of using a two-component curable olefin adhesive, it is possible to sufficiently prevent the adhesiveness from being lowered due to swelling by the electrolytic solution. The thickness of the second adhesive layer 14 is preferably set to 0.5 μm to 5 μm.
(Active Material Department)
In the battery element 75, the positive electrode active material portion 76 is made of, for example, a salt ( For example, it is formed of a mixed composition to which lithium cobaltate, lithium nickelate, lithium iron phosphate, lithium manganate, etc.) are added. The thickness of the positive electrode active material portion 76 is preferably set to 2 μm to 300 μm. Furthermore, the positive electrode active material portion 76 may contain a conductive auxiliary agent such as carbon black or CNT (carbon nanotube). Further, as the negative electrode active material portion 77, for example, a mixed composition in which an additive (eg, graphite, lithium titanate, Si-based alloy, tin-based alloy, etc.) is added to a binder such as PVDF, SBR, CMC, PAN, etc. Formed with. The thickness of the negative electrode active material portion 77 is preferably set to 1 μm to 300 μm. Furthermore, the negative electrode active material portion 77 may contain a conductive auxiliary agent such as carbon black or CNT (carbon nanotube).
You may squeeze it.
(Electrode body)
In the electrode body 70, the positive foil 71 is preferably a hard or soft aluminum foil having a thickness of 7 to 50 μm, the negative foil 72 is preferably a copper foil having a thickness of 7 to 50 μm. A foil and a stainless steel foil can be used.
(separator)
Further, as the separator 73, a polyethylene separator, a polypropylene separator, a separator formed of a multilayer film composed of a polyethylene film and a polypropylene film, or a wet or dry type in which a heat resistant inorganic material such as ceramic is applied to a resin separator thereof. And separators composed of a porous film. The thickness of the separator 73 is preferably set to 5 μm to 50 μm.
本発明は、樹脂層から金属箔が覗くラミネート外装材および樹脂層から活物質部が覗く蓄電デバイス用電極部材の製造に適用される。 The present invention is applied to the manufacture of a laminate exterior material in which a metal foil is viewed from a resin layer and an electrode member for an electricity storage device in which an active material portion is viewed from a resin layer.
１…ラミネート外装材
２…蓄電デバイス用電極部材
３、４…蓄電デバイス
１１…金属箔
１２…第一接着剤層
１３…耐熱性樹脂層
１３ａ…窓部
１４…第二接着剤層
１５…熱可塑性樹脂層
１５ａ…窓部
１６…活物質部
２０、２２…二層体
２１…第一金属箔露出部（金属箔露出部）
２３…第二金属箔露出部（金属箔露出部）
３０、３１…外装体
４０…本体（ラミネート外装材）
４３…第一内側導通部（金属箔露出部）
４４…第一外側導通部（金属箔露出部）
５０…蓋体（ラミネート外装材）
５１…第二内側導通部（金属箔露出部）
５２…第二外側導通部（金属箔露出部）
６０…収納室
６１、６３…熱封止部
７０…電極本体
７１…正極箔
７２…負極箔
７３…セパレーター
７６…正極活物質部（活物質部）
７７…負極活物質部（活物質部）
８０…正極部材（蓄電デバイス用電極部材）
８１…負極部材（蓄電デバイス用電極部材）
１０３…第一外側導通部（金属箔露出部）
１０５…第二外側導通部（金属箔露出部）
DESCRIPTION OF SYMBOLS 1 ... Laminate exterior material 2 ... Electrode member 3 for electrical storage devices, 4 ... Electrical storage device 11 ... Metal foil 12 ... 1st adhesive layer 13 ... Heat-resistant resin layer 13a ... Window part 14 ... 2nd adhesive layer 15 ... Thermoplastic Resin layer 15a ... Window 16 ... Active material part 20, 22 ... Double layer 21 ... First metal foil exposed part (metal foil exposed part)
23. Second metal foil exposed part (metal foil exposed part)
30, 31 ... exterior body 40 ... main body (laminate exterior material)
43 ... 1st inside conduction | electrical_connection part (metal foil exposed part)
44 ... 1st outer side conduction | electrical_connection part (metal foil exposed part)
50: Lid (laminate exterior)
51. Second inner conductive portion (exposed metal foil portion)
52. Second outer conductive portion (exposed metal foil portion)
60 ... Storage chamber 61, 63 ... Heat sealing part 70 ... Electrode body 71 ... Positive electrode foil 72 ... Negative electrode foil 73 ... Separator 76 ... Positive electrode active material part (active material part)
77 ... Negative electrode active material part (active material part)
80 ... Positive electrode member (electrode member for power storage device)
81 ... Negative electrode member (electrode member for power storage device)
103 ... 1st outer side conduction | electrical_connection part (metal foil exposed part)
105 ... Second outer conductive portion (metal foil exposed portion)
Claims (6)
前記金属箔の第二の面に熱可塑性樹脂層を貼り合わせる熱可塑性樹脂層貼り合わせ工程とを含み、
前記耐熱性樹脂層貼り合わせ工程および熱可塑性樹脂層貼り合わせ工程のうちの少なくとも一方の工程を、樹脂層の一部を切り取って少なくとも１つの窓部を形成し、前記窓部を有する樹脂層に接着剤を塗布して金属箔とを貼り合わせることにより行い、前記窓部から金属箔を覗かせて金属箔露出部を形成することを特徴とするラミネート外装材の製造方法。 A heat-resistant resin layer laminating step for laminating a heat-resistant resin layer to the first surface of the metal foil;
Including a thermoplastic resin layer laminating step for laminating a thermoplastic resin layer to the second surface of the metal foil,
At least one of the heat-resistant resin layer laminating step and the thermoplastic resin layer laminating step is performed by cutting out a part of the resin layer to form at least one window portion, and forming the resin layer having the window portion. A method for producing a laminated exterior material, characterized in that an adhesive is applied and bonded to a metal foil, and a metal foil exposed portion is formed by looking through the window from the window.
前記金属箔の第二の面の一部に活物質を付与して活物質部を形成する活物質付与工程と、
前記金属箔の第二の面に熱可塑性樹脂層を貼り合わせる熱可塑性樹脂層貼り合わせ工程とを含み、
耐熱性樹脂層貼り合わせ工程および熱可塑性樹脂層貼り合わせ工程のうちの少なくとも一方の工程を、樹脂層の一部を切り取って少なくとも１つの窓部を形成し、前記窓部を形成した樹脂層と金属箔とを貼り合わせることにより行い、前記窓部において直下の層を覗かせることを特徴とする蓄電デバイス用電極部材の製造方法。 A heat-resistant resin layer laminating step of laminating a heat-resistant resin layer to the first surface of the metal foil that becomes the positive electrode or negative electrode of the electricity storage device;
An active material applying step of forming an active material portion by applying an active material to a part of the second surface of the metal foil;
Including a thermoplastic resin layer laminating step for laminating a thermoplastic resin layer to the second surface of the metal foil,
At least one of the heat-resistant resin layer laminating step and the thermoplastic resin layer laminating step is formed by cutting out a part of the resin layer to form at least one window portion, and the resin layer having the window portion formed thereon, A method for producing an electrode member for an electricity storage device, wherein the method is performed by pasting together a metal foil, and the layer directly under the window is viewed.
正極箔と負極箔とがセパレーターにより隔てられた電極本体を作製する工程と、
前記外装材作製工程により作製した２枚のラミネート外装材を熱可塑性樹脂層同士を向かい合わせることにより、室内に金属箔露出部が臨む収納室を形成するとともに外面に金属箔露出部を有する外装体を作製する工程と、
前記外装体の収納室に前記電極本体を装填して正極箔を一方のラミネート外装材の金属露出部に接触させるともに負極箔をもう一方のラミネート外装材の金属露出部に接触させ、収納室に電解質を注入した状態で２枚のラミネート外装材の熱可塑性樹脂層をヒートシール接合する工程とを含み、
前記２枚のラミネート外装材のうちの少なくとも１枚のラミネート外装材を作製する外装材作製工程を請求項１に記載のラミネート外装材の製造方法により行うことを特徴とする蓄電デバイスの製造方法。 A laminate exterior having a metal foil exposed portion in which a heat resistant resin layer is bonded to the first surface of the metal foil, a thermoplastic resin layer is bonded to the second surface, and at least the metal foil is exposed on the surface of the thermoplastic resin layer side An exterior material production process for producing a material;
Producing an electrode body in which a positive foil and a negative foil are separated by a separator;
An exterior body having a metal foil exposed portion on the outer surface while forming a storage chamber facing the exposed portion of the metal foil by facing the thermoplastic resin layers of the two laminated exterior materials produced by the exterior material producing step. A step of producing
The electrode body is loaded into the housing chamber of the exterior body, and the positive foil is brought into contact with the metal exposed portion of one laminate exterior material, and the negative foil is brought into contact with the metal exposed portion of the other laminate exterior material, Heat sealing and bonding the thermoplastic resin layers of the two laminate sheathing materials in a state where the electrolyte is injected,
The manufacturing method of the electrical storage device characterized by performing the exterior material preparation process which produces at least 1 laminate exterior material of the said 2 laminated exterior materials by the manufacturing method of the laminate exterior material of Claim 1.
負極となる金属箔の第一の面に耐熱性樹脂層が貼り合わされ、第二の面の一部に負極活物質部を有し負極活物質部の周囲に熱可塑性樹脂層が貼り合わされた負極部材を作製する工程と、
前記正極部材と前記負極部材とを互いの熱可塑性樹脂層で接触させて外面に金属露出部を有する外装体を形成し、前記正極活物質部と前記負極活物質部との間にセパレーターを挟み電解質を注入した状態で前記正極部材の熱可塑性樹脂層と前記負極部材の熱可塑性樹脂層とをヒートシール接合する工程とを含み、
前記正極部材を作製する工程および負極部材を作製する工程のうちの少なくとも一方の工程を請求項２〜４のうちのいずれかに記載の蓄電デバイス用電極部材の製造方法により行うことを特徴とする蓄電デバイスの製造方法。
A positive electrode in which a heat-resistant resin layer is bonded to the first surface of the metal foil to be the positive electrode, a positive electrode active material portion is formed on a part of the second surface, and a thermoplastic resin layer is bonded around the positive electrode active material portion Producing a member;
A negative electrode in which a heat-resistant resin layer is bonded to the first surface of the metal foil to be the negative electrode, a negative electrode active material portion is formed on a part of the second surface, and a thermoplastic resin layer is bonded around the negative electrode active material portion Producing a member;
The positive electrode member and the negative electrode member are brought into contact with each other with a thermoplastic resin layer to form an exterior body having a metal exposed portion on the outer surface, and a separator is sandwiched between the positive electrode active material portion and the negative electrode active material portion. Heat sealing and joining the thermoplastic resin layer of the positive electrode member and the thermoplastic resin layer of the negative electrode member in a state where an electrolyte is injected,
The method for producing an electrode member for an electricity storage device according to any one of claims 2 to 4, wherein at least one of the step of producing the positive electrode member and the step of producing the negative electrode member is performed. A method for manufacturing an electricity storage device.
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| JPS55107225A (en) * | 1979-02-09 | 1980-08-16 | Matsushita Electric Ind Co Ltd | Electric double layer capacitor and method of manufacturing same |
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| JPH0294619A (en) * | 1988-09-30 | 1990-04-05 | Elna Co Ltd | Electric double layer capacitor and manufacture thereof |
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