JPH10247489A - Adhesive tape or sheet for preventing internal short circuit of battery - Google Patents
Adhesive tape or sheet for preventing internal short circuit of batteryInfo
- Publication number
- JPH10247489A JPH10247489A JP9050064A JP5006497A JPH10247489A JP H10247489 A JPH10247489 A JP H10247489A JP 9050064 A JP9050064 A JP 9050064A JP 5006497 A JP5006497 A JP 5006497A JP H10247489 A JPH10247489 A JP H10247489A
- Authority
- JP
- Japan
- Prior art keywords
- adhesive tape
- battery
- electrolyte
- adhesive
- short circuit
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池内部において
内部短絡（例えばリードの接触、リード溶接バリ及びリ
ードエッジによるセパレータ貫通などによる短絡）を防
止するための粘着テープ又はシート（以下、単に粘着テ
ープということがある。）に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive tape or sheet (hereinafter simply referred to as "adhesive tape") for preventing an internal short circuit (for example, a short circuit due to lead contact, lead welding burrs, and penetration of a separator by a lead edge) inside a battery. It may be that.)
【０００２】[0002]
【発明が解決しようとする課題】電池内部においては、
例えばリードの接触、リード溶接バリ及びリードエッジ
によるセパレータ貫通などによる内部短絡が発生すると
発火事故などの原因となるため、これら内部を絶縁して
内部短絡を防止するために、図１の如く種々の部位に短
絡防止用粘着テープが使用されている。 ここで使用さ
れている粘着剤の構成材料は、主に被着体との接着性な
どを考慮して選択されているが、かかる粘着剤を電池内
部に使用した場合、たとえ上記の点を考慮して選択して
も未だ電池特性が低下するという問題があった。 これ
は、電池内部で電解液中の電解質（各種塩類）と粘着剤
成分が反応して、他の成分との結合もしくは各種塩類の
自己分解促進が発生して、電解質の機能が低下し、その
結果電池特性に悪影響を及ぼしていると考えられる。
しかし、従来、内部短絡の防止に使用する粘着テープの
粘着剤を選択する際、かかる電池電解液の電解質（各種
塩類）に対しての反応性を考慮して選択することはなさ
れていなかった。In the battery,
For example, if an internal short circuit occurs due to lead contact, lead welding burrs, and penetration of the separator by the lead edge, etc., it may cause a fire accident. Therefore, in order to insulate these insides and prevent internal short circuits, various types as shown in FIG. Adhesive tape for short circuit prevention is used at the site. The constituent material of the pressure-sensitive adhesive used here is selected mainly in consideration of the adhesiveness to an adherend and the like, but when such a pressure-sensitive adhesive is used inside a battery, even if the above points are considered. There is a problem that the battery characteristics are still deteriorated even if the battery is selected. This is because the electrolyte (various salts) in the electrolyte reacts with the adhesive component in the battery, and the bond with other components or the promotion of self-decomposition of the various salts occurs, thereby deteriorating the function of the electrolyte. As a result, it is considered that the battery characteristics are adversely affected.
However, conventionally, when selecting an adhesive for an adhesive tape used for preventing an internal short circuit, selection has not been made in consideration of reactivity of the battery electrolyte with respect to an electrolyte (various salts).
【０００３】[0003]
【課題を解決するための手段】本発明者らはかかる問題
点を解決するために鋭意研究した結果、電池内部におけ
る内部短絡を防止するための粘着テープに用いる粘着剤
として、特定の不飽和度を有するものを用いることによ
り、その粘着テープに本来要求される接着及び粘着特性
を満たしながら、かつ電池内部で電解質塩類と粘着剤成
分との反応による、結合もしくは分解促進等が少なくな
り、電解質の機能が低下しないことで、電池特性に悪影
響を及ぼさないことを見いだし、本発明に至ったもので
ある。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, as an adhesive used for an adhesive tape for preventing an internal short circuit inside a battery, a specific unsaturated degree By using the one having the above, while the adhesive tape has the adhesive and adhesive properties originally required, and due to the reaction between the electrolyte salts and the adhesive component inside the battery, bonding or decomposition promotion is reduced, and the It has been found that the battery characteristics are not adversely affected by the function not being lowered, and the present invention has been achieved.
【０００４】即ち本発明は、電池内部において内部短絡
を防止するための粘着テープ又はシートであって、該粘
着剤がその不飽和度としてヨウ素価が１０以下、又は／
及びＮＭＲ法による不飽和度が０．５［10-2mol/g ］以
下であることを特徴とする電池内部の短絡防止用粘着テ
ープ又はシートを提供する。That is, the present invention relates to an adhesive tape or sheet for preventing an internal short circuit inside a battery, wherein the adhesive has an iodine value of 10 or less as an unsaturated degree, or /
And an adhesive tape or sheet for preventing short-circuiting inside a battery, wherein the unsaturation degree by NMR method is 0.5 [10 -2 mol / g] or less.
【０００５】[0005]
【発明の実施の形態】本発明の短絡防止用粘着テープ又
はシートは、その粘着剤が、電解質塩類との反応性の観
点から、その不飽和度としてヨウ素価が１０以下、好ま
しくは５以下で、又は／及びＮＭＲ法による不飽和度が
０．５［10-2mol/g ］以下、好ましくは０．１［10-2mo
l/g ］以下であることが重要である。 かかる不飽和度
としてのヨウ素価が１０を超え、かつＮＭＲ法による不
飽和度が０．５［10-2mol/g ］を超える場合は、電池内
部で電解液中の電解質（各種塩類）と粘着剤成分とが反
応して、他の成分との結合もしくは各種塩類の自己分解
促進等が発生して、電解質の機能が低下してしまうおそ
れがあるため好ましくない。BEST MODE FOR CARRYING OUT THE INVENTION The pressure-sensitive adhesive tape or sheet according to the present invention is characterized in that the pressure-sensitive adhesive has an iodine value of 10 or less, preferably 5 or less as an unsaturated degree from the viewpoint of reactivity with electrolyte salts. And / or the degree of unsaturation by NMR method is 0.5 [10 -2 mol / g] or less, preferably 0.1 [10 -2 mo / g].
l / g]. When the iodine value as the degree of unsaturation exceeds 10, and the degree of unsaturation by NMR exceeds 0.5 [10 -2 mol / g], the electrolyte (various salts) in the electrolyte solution is used inside the battery. It is not preferable because the reaction with the pressure-sensitive adhesive component may cause the bond with other components or the promotion of self-decomposition of various salts to cause the function of the electrolyte to deteriorate.
【０００６】ここで、上記ヨウ素価は、JIS K 0070に準
じて測定したものであり、またＮＭＲ法による不飽和度
は、プロトンＮＭＲ測定において、オレフィンに由来す
るプロトンのピーク面積を、不飽和度が既知であるサン
プルのピーク面積を標準として算出したものである。Here, the above-mentioned iodine value is measured according to JIS K 0070, and the degree of unsaturation by NMR method is obtained by measuring the peak area of a proton derived from an olefin in the proton NMR measurement. Is calculated using the peak area of the sample for which is known as a standard.
【０００７】本発明の短絡防止用粘着テープ又はシート
における粘着剤の具体的な構成材料は、上記の特定の不
飽和度を有する限り特に限定されないが、例えばポリプ
ロピレンオリゴマー、ポリエチレンオリゴマー、ポリイ
ソブチレン、トリフルオロクロルエチレン−フッ化ビニ
リデン共重合体、ポリジメチルシロキサンなどの単独あ
るいは混合物、さらにこれらに水素添加テルペン樹脂、
水素添加ロジン樹脂などの粘着付与樹脂、また必要に応
じて、各種添加剤などを配合したものが挙げられる。な
お、用いる構成材料自体の不飽和度が上記値以上の場合
でも、不飽和基を接触水素添加などの方法で変性して、
不飽和度を上記範囲内になるようにすることもできる。The specific constituent material of the pressure-sensitive adhesive in the pressure-sensitive adhesive tape or sheet for short-circuit prevention of the present invention is not particularly limited, as long as it has the above-mentioned specific degree of unsaturation. For example, polypropylene oligomer, polyethylene oligomer, polyisobutylene, triisobutylene Fluorochloroethylene-vinylidene fluoride copolymer, polydimethyl siloxane alone or a mixture thereof, further hydrogenated terpene resin,
A tackifying resin such as a hydrogenated rosin resin, and a resin blended with various additives as necessary may be used. In addition, even when the degree of unsaturation of the constituent material used is equal to or more than the above value, the unsaturated group is modified by a method such as catalytic hydrogenation,
The degree of unsaturation can be set within the above range.
【０００８】なお、本発明の短絡防止用粘着テープ又は
シートの粘着剤の電池特性への影響は、後述の実施例に
おける電解液発色試験にて評価することができる。 即
ち、発色は、電解液中の電解質である各種塩類（例えば
リチウム塩）が自己分解又は他の成分との結合等で変質
し起こると考えられる。[0008] The effect of the pressure-sensitive adhesive of the pressure-sensitive adhesive tape or sheet of the present invention on battery characteristics can be evaluated by an electrolytic solution color test in Examples described later. That is, it is considered that the coloring occurs when various salts (for example, lithium salts), which are electrolytes in the electrolytic solution, are degraded due to self-decomposition or bonding with other components.
【０００９】本発明の短絡防止用粘着テープ又はシート
は、かかる粘着剤を適宜基材の少なくとも片面に設けて
なる。 かかる基材としては、特に限定されないが、例
えばＯＰＰ（延伸ポリプロピレン）、ポリエチレン、ポ
リイミド、ポリエステル、フッ素樹脂、ポリメチルペン
テン、シンジオタクチックポリスチレン、ポリフェニレ
ンサルファイド、ポリエチレンとポリプロピレンのブレ
ンドなどのフィルム、これらとガラス繊維との複合物な
どが挙げられる。 なお、これらの基材中に電解液の自
己分解や他成分との結合を促すような不純物を含まず、
電解液に容易に溶出しないものを選択することが好まし
い。In the pressure-sensitive adhesive tape or sheet for preventing short-circuit of the present invention, such a pressure-sensitive adhesive is suitably provided on at least one surface of a substrate. Examples of such a substrate include, but are not limited to, films such as OPP (stretched polypropylene), polyethylene, polyimide, polyester, fluororesin, polymethylpentene, syndiotactic polystyrene, polyphenylene sulfide, and a blend of polyethylene and polypropylene; A composite with a glass fiber is exemplified. In addition, these base materials do not contain impurities that promote self-decomposition of the electrolytic solution and bonding with other components,
It is preferable to select one that does not easily elute in the electrolytic solution.
【００１０】[0010]
【実施例】以下、本発明を実施例によりさらに詳しく説
明するが、本発明はこれらに何ら限定されるものではな
い。 実施例１〜７、比較例１〜２ 表１に示す配合組成の粘着剤を、延伸ポリプロピレン
（ＯＰＰ）フィルム（厚さ３０μｍ）に、３０μｍ厚で
塗布して粘着テープを得、これらの接着力、また粘着剤
の不飽和度、電解液変色性を以下の方法で評価し、その
結果を表２に示す。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto. Examples 1 to 7 and Comparative Examples 1 and 2 A pressure-sensitive adhesive having the composition shown in Table 1 was applied to an oriented polypropylene (OPP) film (thickness: 30 μm) at a thickness of 30 μm to obtain a pressure-sensitive adhesive tape. In addition, the degree of unsaturation and discoloration of the electrolytic solution of the pressure-sensitive adhesive were evaluated by the following methods, and the results are shown in Table 2.
【００１１】[0011]
【表１】 [Table 1]
【００１２】〔接着力〕得られた粘着テープを、被着体
標準としてのステンレス板に貼り合わせ、テープを１８
０°ピールにて引き剥がした時の荷重を測定した。 〔短絡防止性能〕図１に示す如く、リード１のエッジ及
びバリ、リード１と集電体２との溶接部の溶接バリ及び
エッジ、集電体２のエッジ及びバリを上記粘着テープ４
で被覆したところ、この粘着テープの十分な機械的強度
や耐熱性などの基本物性により、内部短絡を良好に防止
することができた。 〔不飽和度（ヨウ素価）〕JIS K 0070に準じて測定し
た。 〔不飽和度（ＮＭＲ法）〕プロトンＮＭＲ測定におい
て、オレフィンに由来するプロトンのピーク面積を、不
飽和度が既知であるサンプルのピーク面積を標準として
算出した。 〔電解液変色性（電解液発色試験）〕溶媒（電解液）と
しての、エチレンカーボネート（ＥＣ）：ジメチルカー
ボネート（ＤＭＣ）：ジエチルカーボネート（ＤＥＣ）
＝１：１：１（体積比）に、溶質（電解質）として６フ
ッ化リン酸リチウム（ＬｉＰＦ6 ）を１mol/dm3 添加し
てなる電解液に、十分に乾燥したサンプルを、アルゴン
置換した環境下でサンプル：電解液＝１：２００（重量
比）にて添加、密閉した。 そして６０℃にて１週間保
存後、電解液の発色度合いをサンプルを添加していない
電解液をブランクとして、目視にて比較した。 なお、
発色は電解液中の電解質であるリチウム塩が自己分解又
は他の成分との結合等で変質して起こると考えられる。[Adhesive Strength] The obtained pressure-sensitive adhesive tape was adhered to a stainless steel plate as a standard for an adherend.
The load when peeled off at 0 ° peel was measured. [Short Circuit Prevention Performance] As shown in FIG.
As a result, the internal short circuit was successfully prevented due to the basic physical properties such as sufficient mechanical strength and heat resistance of the pressure-sensitive adhesive tape. [Unsaturation (iodine value)] Measured according to JIS K0070. [Degree of Unsaturation (NMR Method)] In proton NMR measurement, the peak area of a proton derived from an olefin was calculated using the peak area of a sample having a known degree of unsaturation as a standard. [Electrolytic Solution Discoloration (Electrolytic Solution Coloring Test)] Ethylene carbonate (EC): dimethyl carbonate (DMC): diethyl carbonate (DEC) as a solvent (electrolytic solution)
= 1: 1: 1 (volume ratio) and 1 mol / dm 3 of lithium hexafluorophosphate (LiPF 6 ) as a solute (electrolyte) was replaced with an argon-substituted sample. Under an environment, the sample: electrolyte solution was added at 1: 200 (weight ratio) and sealed. After storage at 60 ° C. for one week, the degree of color development of the electrolyte was visually compared with the electrolyte without the sample as a blank. In addition,
It is considered that the color development occurs when the lithium salt, which is the electrolyte in the electrolytic solution, changes in quality due to self-decomposition or bonding with other components.
【００１３】[0013]
【表２】 [Table 2]
【００１４】[0014]
【発明の効果】本発明の電池内部の短絡防止用粘着テー
プ又はシートは、その粘着テープに本来要求される被着
体への接着及び粘着特性を満たしながら、かつ電池内部
で電解質塩類と粘着剤成分との反応による、結合もしく
は分解促進の発生等が少なくなり、電解質の機能が低下
しないことで、電池特性に悪影響を及ぼさないという効
果があり、特性及び信頼性の高い電池を作成できるとい
う利点がある。The adhesive tape or sheet for preventing short-circuiting inside a battery according to the present invention satisfies the adhesiveness and adhesive properties to an adherend originally required for the adhesive tape, and also contains an electrolyte salt and an adhesive inside the battery. The effect of reducing the occurrence of binding or accelerated decomposition due to the reaction with the components and preventing the function of the electrolyte from being reduced does not adversely affect the battery characteristics, and has the advantage that a battery having high characteristics and reliability can be produced. There is.
【図１】 電池内部の構造を示す一部分解概略図であ
る。FIG. 1 is a partially exploded schematic view showing the internal structure of a battery.
１ リード ２ 集電体（Ｃｕ、Ａｌ箔） ３ 活物質層 ４ 粘着テープ DESCRIPTION OF SYMBOLS 1 Lead 2 Current collector (Cu, Al foil) 3 Active material layer 4 Adhesive tape
───────────────────────────────────────────────────── フロントページの続き (72)発明者 奥野 敏光 大阪府茨木市下穂積１丁目１番２号 日東 電工株式会社内 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Toshimitsu Okuno 1-2-1, Shimohozumi, Ibaraki-shi, Osaka Nitto Denko Corporation
Claims (1)
めの粘着テープ又はシートであって、該粘着剤がその不
飽和度としてヨウ素価が１０以下、又は／及びＮＭＲ法
による不飽和度が０．５［10-2mol/g ］以下であること
を特徴とする電池内部の短絡防止用粘着テープ又はシー
ト。1. An adhesive tape or sheet for preventing an internal short circuit inside a battery, wherein the adhesive has an iodine value of 10 or less as an unsaturation degree and / or an unsaturation degree of 0. An adhesive tape or sheet for preventing short circuit inside a battery, wherein the adhesive tape or sheet has a content of 5 [10 -2 mol / g] or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9050064A JPH10247489A (en) | 1997-03-05 | 1997-03-05 | Adhesive tape or sheet for preventing internal short circuit of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9050064A JPH10247489A (en) | 1997-03-05 | 1997-03-05 | Adhesive tape or sheet for preventing internal short circuit of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10247489A true JPH10247489A (en) | 1998-09-14 |
Family
ID=12848576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9050064A Pending JPH10247489A (en) | 1997-03-05 | 1997-03-05 | Adhesive tape or sheet for preventing internal short circuit of battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10247489A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000173658A (en) * | 1998-12-02 | 2000-06-23 | Nitto Denko Corp | Glue, adhesive or adhesive tape sheet for battery |
| JP2003132875A (en) * | 2001-10-24 | 2003-05-09 | Matsushita Electric Ind Co Ltd | Lithium secondary battery |
| KR20030081640A (en) * | 2002-04-12 | 2003-10-22 | 삼성에스디아이 주식회사 | Jelly-roll type battery unit and the secondary battery applying the same |
| DE102004011683A1 (en) * | 2004-03-10 | 2005-10-06 | Gaia Akkumulatorenwerke Gmbh | Spreadable granulate of soft resinous and/or rubbery polyisobutylene and solid additive, used together with fluorinated polymer in electrode materials, e.g. for lithium ion-polymer accumulators |
| CN101824282A (en) * | 2009-03-02 | 2010-09-08 | 日东电工株式会社 | Battery is with pressure-sensitive adhesive tape and use the battery of this battery with pressure-sensitive adhesive tape |
| EP2423288A2 (en) | 2010-08-31 | 2012-02-29 | Nitto Denko Corporation | Pressure-sensitive adhesive tape for protecting electrode plate |
| EP2447331A1 (en) | 2010-10-29 | 2012-05-02 | Nitto Denko Corporation | Pressure-sensitive adhesive tape for battery |
| EP2481784A1 (en) | 2011-01-27 | 2012-08-01 | Nitto Denko Corporation | Laminate for nonaqueous battery |
| EP2573152A2 (en) | 2011-09-20 | 2013-03-27 | Nitto Denko Corporation | Pressure-sensitive adhesive tape for battery |
| WO2016121339A1 (en) * | 2015-01-29 | 2016-08-04 | 三洋電機株式会社 | Nonaqueous electrolyte secondary battery |
| US20170279110A1 (en) * | 2016-03-24 | 2017-09-28 | Dongguan Amperex Technology Limited | Li-ion battery electrode piece |
| CN113363642A (en) * | 2021-05-31 | 2021-09-07 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
-
1997
- 1997-03-05 JP JP9050064A patent/JPH10247489A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000173658A (en) * | 1998-12-02 | 2000-06-23 | Nitto Denko Corp | Glue, adhesive or adhesive tape sheet for battery |
| JP2003132875A (en) * | 2001-10-24 | 2003-05-09 | Matsushita Electric Ind Co Ltd | Lithium secondary battery |
| KR20030081640A (en) * | 2002-04-12 | 2003-10-22 | 삼성에스디아이 주식회사 | Jelly-roll type battery unit and the secondary battery applying the same |
| DE102004011683A1 (en) * | 2004-03-10 | 2005-10-06 | Gaia Akkumulatorenwerke Gmbh | Spreadable granulate of soft resinous and/or rubbery polyisobutylene and solid additive, used together with fluorinated polymer in electrode materials, e.g. for lithium ion-polymer accumulators |
| DE102004011683B4 (en) * | 2004-03-10 | 2011-12-15 | Dilo Trading Ag | Homogeneous polymer blend of fluorine-containing polymers and a polyisobutylene granule mixture, use of the homogeneous polymer blend and method for producing an electrode material |
| US8592033B2 (en) | 2009-03-02 | 2013-11-26 | Nitto Denko Corporation | Pressure-sensitive adhesive tape for battery and battery using the pressure-sensitive adhesive tape for battery |
| CN101824282A (en) * | 2009-03-02 | 2010-09-08 | 日东电工株式会社 | Battery is with pressure-sensitive adhesive tape and use the battery of this battery with pressure-sensitive adhesive tape |
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