JP2012113966A - Aluminum exterior body - Google Patents

Aluminum exterior body Download PDF

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JP2012113966A
JP2012113966A JP2010261922A JP2010261922A JP2012113966A JP 2012113966 A JP2012113966 A JP 2012113966A JP 2010261922 A JP2010261922 A JP 2010261922A JP 2010261922 A JP2010261922 A JP 2010261922A JP 2012113966 A JP2012113966 A JP 2012113966A
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aluminum
aluminum laminate
tape
exterior body
electrode tab
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JP4898952B1 (en
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Shinkichi Tanaka
信吉 田中
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II P I KK
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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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  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

PROBLEM TO BE SOLVED: To perform firm bonding of an electrode tab, etc. similar to chromate treatment by an environmentally safe processing method without the chromate treatment.SOLUTION: An aluminum exterior body 3 includes: two square aluminum laminate films 5 that encapsulate a power generation element or power storage element 4; and two positive and negative electrode tabs 1 that are connected to the power generation element or power storage element 4 and project from between both of the aluminum laminate films 5. Heat deposition is performed on each of the electrode tabs 1 and each of the aluminum laminate films 5 through a PP tape 2. In the heat deposition of the electrode tabs 1 and the aluminum laminate films 5 by the PP tape 2, surface treatment is performed on the surfaces of the electrode tabs 1 by a zirconium-based treatment agent.

Description

本発明は、主としてリチウムイオン電池、電気二重層キャパシタおよびリチウムイオンキャパシタ等に用いられるアルミニウム外装体に関する。   The present invention relates to an aluminum exterior body mainly used for lithium ion batteries, electric double layer capacitors, lithium ion capacitors and the like.

従来、例えばアルミニウムラミネートフィルムを用いたリチウムイオン電池等では、アルミニウム箔とその内面を被覆する樹脂皮膜層との間にクロメート処理による皮膜が形成されていた。   Conventionally, for example, in a lithium ion battery using an aluminum laminate film, a film is formed by chromate treatment between an aluminum foil and a resin film layer covering the inner surface thereof.

また、他のリチウムイオン電池では、基材層、接着層、化成処理層およびアルミニウムシート層を有する外装体において、前記化成処理層にクロメート処理が施されていた。   In other lithium ion batteries, the chemical conversion treatment layer is subjected to a chromate treatment in an exterior body having a base material layer, an adhesive layer, a chemical conversion treatment layer, and an aluminum sheet layer.

更にまた、他のリチウムイオン電池では、その電極タブとアルミニウムラミネートフィルムとがＰＰテープを介して熱溶着されており、そして、通常、前記電極タブはアルミニウム製であって、その表面には陽極酸化皮膜が存在し、該皮膜によって強固な接着が阻害されることから、電極タブとアルミニウムラミネートフィルムとをＰＰテープで熱溶着するにあたっては、前記電極表面にクロメート処理が施されていた。   Furthermore, in other lithium ion batteries, the electrode tab and the aluminum laminate film are thermally welded via PP tape, and the electrode tab is usually made of aluminum, and the surface thereof is anodized. Since a film is present and strong adhesion is inhibited by the film, the electrode surface and the aluminum laminate film were subjected to chromate treatment on the electrode surface when heat-welded with PP tape.

特開２００１−１９６０３６JP2001-196036 特開２００２−２４５９８４JP2002-245984

しかしながら、前述したクロメートにはクロム酸が含有されていることから、今後、Ｒｏｔｈ規制の対象となるおそれがあり、そのため前記クロメート処理以外の方法で電極タブ等を強固に接着させる必要がある。   However, since the chromate described above contains chromic acid, it may be subject to Roth regulation in the future, and therefore, it is necessary to firmly bond the electrode tab or the like by a method other than the chromate treatment.

本発明の目的は、前記クロメート処理を行うことなく、環境的に安全な処理方法で、しかもクロメート処理と同様に強固な電極タブ等の接着が行えるアルミニウム外装体を提供することにある。   An object of the present invention is to provide an aluminum outer package that can adhere to a strong electrode tab or the like by an environmentally safe treatment method without performing the chromate treatment, and similarly to the chromate treatment.

請求項１記載の本発明は、発電要素または蓄電要素を封入する二枚の方形なアルミニウムラミネートフィルムと、前記発電要素または蓄電要素に接続され、両アルミニウムラミネートフィルム間から突出した正負二枚の電極タブとを有し、各電極タブと前記アルミニウムラミネートフィルムとがＰＰテープを介して熱溶着されたアルミニウム外装体において、前記ＰＰテープによる電極タブとアルミニウムラミネートとの熱溶着にあたり、電極表面にジルコニウム系処理剤による表面処理が施されていることを技術的特徴とするものである。   The present invention according to claim 1 includes two rectangular aluminum laminate films enclosing a power generation element or a power storage element, and two positive and negative electrodes connected to the power generation element or the power storage element and projecting from between the two aluminum laminate films In the aluminum exterior body in which each electrode tab and the aluminum laminate film are heat-welded via PP tape, the electrode surface and the aluminum laminate using PP tape are heat-welded with a zirconium-based electrode surface. It is a technical feature that surface treatment with a treating agent is performed.

前記電極表面のジルコニウム系処理は、電極の全表面に行っても良いし、ＰＰテープによる熱溶着面だけに行っても良い。   The zirconium-based treatment on the electrode surface may be performed on the entire surface of the electrode, or may be performed only on the heat-welded surface using PP tape.

請求項２記載の本発明は、リチウムイオン電池、電気二重層キャパシタまたはリチウムイオンキャパシタに用いられる請求項１記載のアルミニウム外装体である。   The present invention according to claim 2 is the aluminum exterior body according to claim 1, which is used for a lithium ion battery, an electric double layer capacitor or a lithium ion capacitor.

本発明に係るアルミニウム外装体は、発電要素または蓄電要素を封入する二枚の方形なアルミニウムラミネートフィルムと、前記発電要素または蓄電要素に接続され、両アルミニウムラミネートフィルム間から突出した正負二枚の電極タブとを有し、各電極タブと前記アルミニウムラミネートフィルムとがＰＰテープを介して熱溶着されたアルミニウム外装体において、前記ＰＰテープによる電極タブとアルミニウムラミネートとの熱溶着にあたり、電極タブ表面にジルコニウム処理が施されているため、従来のクロメート処理のような環境面での問題がなく、しかも従来のクロメート処理の場合と同様、電極タブとアルミニウムラミネートフィルムとを強固に接着することができる。   The aluminum outer package according to the present invention includes two rectangular aluminum laminate films enclosing a power generation element or a power storage element, and two positive and negative electrodes connected to the power generation element or the power storage element and projecting between the two aluminum laminate films In the aluminum exterior body in which each electrode tab and the aluminum laminate film are thermally welded via PP tape, the electrode tab and the aluminum laminate are thermally welded with the PP tape. Since the treatment is performed, there is no environmental problem as in the conventional chromate treatment, and the electrode tab and the aluminum laminate film can be firmly bonded as in the conventional chromate treatment.


実施形態に用いられるリチウムイオン二次電池用電極タブの正面図である。It is a front view of the electrode tab for lithium ion secondary batteries used for an embodiment. 実施形態に用いられる電気二重層キャパシタ用電極タブの正面図である。It is a front view of the electrode tab for electric double layer capacitors used for an embodiment. 実施形態に係るアルミニウム外装体の縦断面図である。It is a longitudinal cross-sectional view of the aluminum exterior body which concerns on embodiment. 図３における電極タブ突出部分の拡大縦断面図である。FIG. 4 is an enlarged vertical cross-sectional view of an electrode tab protruding portion in FIG. 3. 実施形態に係るアルミニウム外装体の斜視図である。It is a perspective view of the aluminum exterior body concerning an embodiment. 本発明が適用されるリチウムイオン電池の内部構造を示す斜視図である。It is a perspective view which shows the internal structure of the lithium ion battery with which this invention is applied.

次に、本発明の実施形態を図面にしたがって説明するが、本発明はかかる実施形態に限定されるものではない。   Next, although embodiment of this invention is described according to drawing, this invention is not limited to this embodiment.

図１に示すように、リチウムイオン二次電池用の電極タブ１Ａは、全体が方形板状であって、銅ニッケル合金で構成されており、その一端寄り部分には市販のＰＰテープ２が貼着されている。   As shown in FIG. 1, the electrode tab 1A for a lithium ion secondary battery is a square plate as a whole and is composed of a copper nickel alloy, and a commercially available PP tape 2 is attached to a portion near one end thereof. It is worn.

ＰＰテープ２は、本実施形態では三層構造であって、両面を構成するポリプロピレン層の間に耐熱性シートやパルプシートが挟まれているものである。   The PP tape 2 has a three-layer structure in this embodiment, and a heat-resistant sheet or a pulp sheet is sandwiched between polypropylene layers constituting both surfaces.

図２に示すように、電気二重層キャパシタ用の電極タブ１Ｂは、全体が方形板状であって、アルミニウム（アルミニウム合金を含む）で構成されており、その一端寄り部分には前述した市販のＰＰテープ２が貼着されている。また、当該電極タブ１Ｂは、前記リチウムイオン二次電池用の電極タブ１Ａよりも縦長である。   As shown in FIG. 2, the electrode tab 1B for the electric double layer capacitor has a square plate shape as a whole and is made of aluminum (including an aluminum alloy). PP tape 2 is stuck. The electrode tab 1B is longer than the electrode tab 1A for the lithium ion secondary battery.

図３および図４に示すように、本実施形態に係るアルミニウム外装体３は、発電要素または蓄電要素となる電気機構部４を封入する二枚の方形なアルミニウムラミネートフィルム５と、前記電気機構部４に接続され、両アルミニウムラミネートフィルム５間から突出した正負二枚の電極タブ１とを有し、各電極タブ１と前記アルミニウムラミネートフィルム５とが前記ＰＰテープ２を介して熱溶着されている。そして、前記ＰＰテープ２による電極タブ１とアルミニウムラミネート５との熱溶着にあたっては、予め電極タブ１の表面にジルコニウム系処理剤（例：日本パーカライジング株式会社 商品名：パルコートＥ１００等）による表面処理が施されている。   As shown in FIG. 3 and FIG. 4, the aluminum exterior body 3 according to the present embodiment includes two rectangular aluminum laminate films 5 that enclose an electrical mechanism portion 4 serving as a power generation element or a power storage element, and the electrical mechanism portion. 4 and two positive and negative electrode tabs 1 projecting from between the two aluminum laminate films 5, and each electrode tab 1 and the aluminum laminate film 5 are thermally welded via the PP tape 2. . And in the heat welding of the electrode tab 1 and the aluminum laminate 5 by the said PP tape 2, the surface treatment by a zirconium type processing agent (example: Nippon Parkerizing Co., Ltd. brand name: Palcoat E100 etc.) is carried out on the surface of the electrode tab 1 beforehand. It has been subjected.

なお、電極タブ１は、具体的には前述したリチウムイオン二次電池用電極タブ１Ａや電気二重層キャパシタ用電極タブ１Ｂである。また、前記アルミニウムラミネートフィルム５はアルミニウム箔にポリプロピレンフィルムがラミネートされたものである。   The electrode tab 1 is specifically the above-described electrode tab 1A for a lithium ion secondary battery or the electrode tab 1B for an electric double layer capacitor. The aluminum laminate film 5 is obtained by laminating a polypropylene film on an aluminum foil.

図５に示すように、本実施形態のアルミニウム外装体３は、従来のものと同様に、両端から電極タブ１の一部が突出した構造となされているが、本発明はこれに限定されず、図６に示すような構造のリチウムイオン電池におけるアルミニウム外装体２３において、その一側に正負それぞれの電極タブ１が突出する場合もある。   As shown in FIG. 5, the aluminum exterior body 3 of this embodiment has a structure in which part of the electrode tab 1 protrudes from both ends, as in the conventional case, but the present invention is not limited to this. In the aluminum outer package 23 in the lithium ion battery having the structure as shown in FIG. 6, the positive and negative electrode tabs 1 may protrude on one side.

なお、図中２５はセパレータを示す。   In the figure, 25 indicates a separator.

本発明によれば、アルミニウム外装体におけるアルミニウムラミネートフィルムと電極タブとの接着において、従来のクロメート処理と同様の接着強度が得られ、しかも環境面でも全く問題がないため、電池やキャパシタの分野において幅広いが利用が期待できる。   According to the present invention, the adhesive strength between the aluminum laminate film and the electrode tab in the aluminum outer package is the same as that of the conventional chromate treatment, and there is no environmental problem at all. A wide range can be used.

１ 電極タブ
２ ＰＰテープ
３ アルミニウム外装体
４ 電気機構部
５ アルミニウムラミネートフィルム DESCRIPTION OF SYMBOLS 1 Electrode tab 2 PP tape 3 Aluminum exterior body 4 Electric mechanism part 5 Aluminum laminate film

請求項１記載の本発明は、発電要素または蓄電要素を封入する二枚の方形なアルミニウムラミネートフィルムと、前記発電要素または蓄電要素に接続され、両アルミニウムラミネートフィルム間から突出した正負二枚の電極タブとを有し、各電極タブと前記アルミニウムラミネートフィルムとがＰＰテープを介して熱溶着されたアルミニウム外装体であって、アルミニウムラミネートフィルムがアルミニウム箔にポリプロピレンフィルムがラミネートされたものであり、ＰＰテープが両面を構成するポリプロピレン層の間に耐熱性シートまたはパルプシートが挟まれたものであり、該ＰＰテープによる電極タブと前記アルミニウムラミネートとの熱溶着にあたり、電極表面にジルコニウム系処理剤による表面処理が施されていることを技術的特徴とするものである。 The present invention according to claim 1 includes two rectangular aluminum laminate films enclosing a power generation element or a power storage element, and two positive and negative electrodes connected to the power generation element or the power storage element and projecting from between the two aluminum laminate films Each of the electrode tabs and the aluminum laminate film is heat-welded via PP tape, and the aluminum laminate film is obtained by laminating a polypropylene film on an aluminum foil. A heat-resistant sheet or a pulp sheet is sandwiched between polypropylene layers constituting both surfaces of the tape, and the surface of the electrode surface is coated with a zirconium-based treatment agent in the thermal welding of the electrode tab with the PP tape and the aluminum laminate. That the treatment has been applied It is an butterfly.

Claims (2)

発電要素または蓄電要素を封入する二枚の方形なアルミニウムラミネートフィルムと、前記発電要素または蓄電要素に接続され、両アルミニウムラミネートフィルム間から突出した正負二枚の電極タブとを有し、各電極タブと前記アルミニウムラミネートフィルムとがＰＰテープを介して熱溶着されたアルミニウム外装体において、前記ＰＰテープによる電極タブとアルミニウムラミネートとの熱溶着にあたり、電極表面にジルコニウム系処理剤による表面処理が施されている、アルミニウム外装体。 Each of the electrode tabs has two rectangular aluminum laminate films enclosing the power generation element or the power storage element, and two positive and negative electrode tabs connected to the power generation element or the power storage element and projecting from between the aluminum laminate films. In the aluminum exterior body in which the aluminum laminate film is thermally welded via PP tape, the surface of the electrode is subjected to a surface treatment with a zirconium-based treatment agent when the electrode tab and the aluminum laminate are thermally welded with the PP tape. Aluminum exterior body. リチウムイオン電池、電気二重層キャパシタまたはリチウムイオンキャパシタに用いられる請求項１記載のアルミニウム外装体。 The aluminum exterior body according to claim 1, which is used for a lithium ion battery, an electric double layer capacitor or a lithium ion capacitor.
JP2010261922A 2010-11-25 2010-11-25 Aluminum exterior body Expired - Fee Related JP4898952B1 (en)

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JP3751834B2 (en) * 2001-02-05 2006-03-01 日本電気株式会社 Film seal type non-aqueous electrolyte battery
JP4595302B2 (en) * 2003-09-04 2010-12-08 日産自動車株式会社 Bipolar battery
JP2005149783A (en) * 2003-11-12 2005-06-09 Nissan Motor Co Ltd Secondary battery, battery pack, complex battery pack, and vehicle
JP4784236B2 (en) * 2004-09-30 2011-10-05 住友電気工業株式会社 Non-aqueous electrolyte battery lead wire and non-aqueous electrolyte battery
JP5157337B2 (en) * 2007-03-30 2013-03-06 大日本印刷株式会社 Battery tab and lithium ion battery using the same
JP5308696B2 (en) * 2008-03-17 2013-10-09 藤森工業株式会社 Sealing film and electrode with sealing film
JP5422842B2 (en) * 2009-04-10 2014-02-19 昭和電工パッケージング株式会社 Electrochemical devices

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