JP2000353504A - Laminate pack battery - Google Patents
Laminate pack batteryInfo
- Publication number
- JP2000353504A JP2000353504A JP11163412A JP16341299A JP2000353504A JP 2000353504 A JP2000353504 A JP 2000353504A JP 11163412 A JP11163412 A JP 11163412A JP 16341299 A JP16341299 A JP 16341299A JP 2000353504 A JP2000353504 A JP 2000353504A
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- battery
- lead terminals
- heat
- lead terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ラミネートパック
電池に関するものであり、特にラミネートパック電池用
接着剤に関するものである。The present invention relates to a laminate pack battery, and more particularly to an adhesive for a laminate pack battery.
【０００２】[0002]
【従来の技術】近年、携帯用電子機器や電池使用機器の
小型軽量化が急速に進展している。それに伴い、それら
電子機器の電源として使用される電池についても、小型
軽量・薄型化の要求が増加してきている。特にリチウム
イオン電池においては、電解液をゲル化することで液漏
れを防ぎ、それによって従来のように頑丈に封口された
電槽を不要にした電池が提案されている。例えば特開平
６−３０２３０５号には、一対の正極集電体と負極集電
体が端子および電槽を兼ね、両集電体間に枠状熱融着性
樹脂を挟んでシールする方法が提案されている。このよ
うな薄型電池は、ＩＣカード等への用途が期待されてい
る。2. Description of the Related Art In recent years, portable electronic devices and devices using batteries have been rapidly reduced in size and weight. Along with this, the demand for smaller, lighter, and thinner batteries used as power supplies for these electronic devices has been increasing. In particular, in the case of lithium ion batteries, a battery has been proposed in which the electrolyte is gelled to prevent liquid leakage, thereby eliminating the need for a conventionally tightly sealed battery case. For example, Japanese Unexamined Patent Publication No. Hei 6-302305 proposes a method in which a pair of a positive electrode current collector and a negative electrode current collector also serve as a terminal and a battery case, and a frame-like heat-fusible resin is sandwiched between the two current collectors to seal them. Have been. Such thin batteries are expected to be used for IC cards and the like.
【０００３】一方、そのような小型軽量の電池は、携帯
情報端末機器等への用途の需要が高まっており、それに
伴い電池容量も大きなものが求められている。電池容量
を大きくしようとすると電極の体積を大きくせねばなら
ず、そうなれば上記に例示した電池のように端子を兼ね
た一対の正極集電体と負極集電体を電槽とする構造の薄
型電池では、大きな容量を持つ電池の設計が困難にな
る。そこで、電極を積層、巻き込み、折り畳み等の方法
で容量を上げたうえ、熱融着性樹脂を片面に配したアル
ミラミネートパック等で全体を包み、ヒートシール法に
より封口する方法が提案されている。On the other hand, such small and lightweight batteries are increasingly used for portable information terminal equipment and the like, and accordingly, batteries having a large battery capacity are required. In order to increase the battery capacity, the volume of the electrode must be increased. In such a case, as in the battery exemplified above, a structure in which a pair of a positive electrode current collector and a negative electrode current collector also serving as terminals are used as a battery case. With a thin battery, it is difficult to design a battery having a large capacity. Therefore, a method has been proposed in which the capacity is increased by a method such as laminating, winding, or folding the electrodes, and the whole is wrapped with an aluminum laminate pack or the like in which a heat-fusible resin is arranged on one side, and sealed by a heat sealing method. .
【０００４】ここで、封口性を向上させるために封口材
にフィラーを入れる方法がいくつか提案されている。例
えば、熱融着性樹脂を用いるものではないが、特開昭６
２−１５４５５２号では電池の封口剤に無機微粒子を含
ませる方法が示されている。また、特開昭６２―５５８
６６号、特開昭６３―２２１５５５号、特開昭６３―２
４４５５１号、特開昭６３―２４４５５２号では、熱融
着性樹脂に無機物質をフィラーとして混入する方法が示
されている。封口材にフィラーを混入すると、ヒートシ
ール時に加えられた熱により封口材が流れ出し、アルミ
ラミネート材料のアルミニウムが露出し、絶縁性を低下
させるのを防ぐことができ、また、封口材を透過して侵
入する水分をフィラーの混入によって侵入経路を長くす
ることで水分の侵入を遅らせることができる。Here, there have been proposed several methods for adding a filler to a sealing material in order to improve the sealing property. For example, although a heat-fusible resin is not used,
Japanese Patent Application Laid-Open No. 2-154552 discloses a method of including inorganic fine particles in a sealing agent for a battery. In addition, Japanese Patent Application Laid-Open No. 62-558
No. 66, JP-A-63-221555, JP-A-63-2
No. 44551 and JP-A-63-244552 disclose a method in which an inorganic substance is mixed as a filler into a heat-fusible resin. When a filler is mixed into the sealing material, the sealing material flows out due to the heat applied at the time of heat sealing, the aluminum of the aluminum laminate material is exposed, and it is possible to prevent the insulating property from being lowered. The invasion of moisture can be delayed by lengthening the invasion path of the invading moisture by mixing the filler.
【０００５】ところで、アルミラミネートパック表面は
電気的に絶縁体であるため、ラミネートパック電槽内部
から正負極のリード端子を用いてラミネートパックの封
口部を横断し、外部に端子を導き出す必要がある。リー
ド端子としては、例えばニッケル板などの金属板を用い
ることができる。Since the surface of the aluminum laminate pack is an electrically insulating material, it is necessary to use the positive and negative lead terminals from the inside of the laminate pack container to cross the sealing portion of the laminate pack and to lead the terminals to the outside. . As the lead terminals, for example, a metal plate such as a nickel plate can be used.
【０００６】封口部のうちリード端子周縁部について
は、シール性が特に不足することから、熱融着される温
度で溶融する接着剤を別途配置することで、接着力を強
化することが行われている。接着剤としては、例えば変
成ポリオレフィンが用いられる。[0006] Since the sealing performance is particularly insufficient in the peripheral portion of the lead terminal in the sealing portion, an adhesive that melts at the temperature at which the heat is fused is separately provided to enhance the adhesive force. ing. As the adhesive, for example, a modified polyolefin is used.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上記熱
融着性樹脂にフィラーを混入する方法は、電池の重量エ
ネルギー密度並びに体積エネルギー密度を下げることに
なり、特に軽量薄型の電池ではこれによるデメリットは
大きかった。また、これらの技術を用いても、上記リー
ド端子の周縁部で生じる問題を解決するものではなかっ
た。However, the method of mixing a filler into the heat-fusible resin reduces the weight energy density and the volume energy density of the battery. It was big. Further, even if these techniques are used, the problem that occurs at the peripheral edge of the lead terminal is not solved.
【０００８】一方、封口部のリード端子周縁部において
は、固い金属製のリード端子が挟み込まれるため、ヒー
トシール時に接着剤や熱融着性樹脂に亀裂等が生じやす
いという問題があった。これらに亀裂等が生じると、ア
ルミラミネートに用いられているアルミニウムが露出
し、リード端子と電気的に接触して電池の短絡を引き起
こすおそれがある。ヒートシール条件を厳密にコントロ
ールすることで、亀裂等の発生をある程度減少させるこ
とができるが、それでも亀裂等に基づく短絡不良を大き
く低減させることは困難である。On the other hand, since a hard metal lead terminal is sandwiched in the peripheral portion of the lead terminal in the sealing portion, there is a problem that a crack or the like is easily generated in the adhesive or the heat-fusible resin at the time of heat sealing. When cracks or the like occur in these, the aluminum used for the aluminum laminate is exposed, and may be in electrical contact with the lead terminals to cause a short circuit of the battery. Although the occurrence of cracks and the like can be reduced to some extent by strictly controlling the heat sealing conditions, it is still difficult to greatly reduce short-circuit defects due to cracks and the like.
【０００９】本発明は、上記問題点を解決するべくなさ
れたものであって、ヒートシール時に発生するリード端
子部分の短絡不良を低減させ、高い生産効率を実現する
ことを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to reduce short circuit defects at a lead terminal portion which occur at the time of heat sealing and realize high production efficiency.
【００１０】[0010]
【課題を解決するための手段】本発明は上記の目的を達
成するべく、熱融着樹脂によって全体を封口する電池に
おいて、熱融着される温度で溶融しない物質を含有する
接着剤をリード端子周縁に配置して、該接着剤と該熱融
着樹脂とを接合させたラミネートパック電池である。ま
た、上記接着剤が、熱融着される温度で溶融しない繊維
状、粒子状、多孔体フィルム状、無孔体フィルム状の中
から選ばれた少なくともひとつの形状の物質を含んでい
るラミネートパック電池である。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a battery which is entirely sealed with a heat-sealing resin. This is a laminate pack battery in which the adhesive and the heat-sealing resin are bonded to each other at the periphery. A laminate pack containing at least one material selected from the group consisting of fibrous, particulate, porous film, and non-porous films, wherein the adhesive does not melt at a temperature at which the adhesive is thermally fused. Battery.
【００１１】熱融着される温度で溶融しない物質として
は、ポリエチレンテレフタレート、エポキシ樹脂、ポリ
カーボネートなど多くの高分子材料、セラミック樹脂、
無機ガラス、金属酸化物などの電子伝導性を持たない無
機材料を用いることができる。Examples of the substance which does not melt at the temperature at which heat fusion is performed include many polymer materials such as polyethylene terephthalate, epoxy resin and polycarbonate, ceramic resin, and the like.
An inorganic material having no electronic conductivity such as inorganic glass or metal oxide can be used.
【００１２】接着剤が、熱融着される温度で溶融しない
物質を含有する構造としては、溶融しない物質の繊維ま
たは多孔体の細孔に接着剤が埋め込まれた構造をとる方
法、繊維または多孔体が接着剤フィルムに挟み込まれた
構造をとる方法、粒子状の溶融しない物質が接着剤に埋
め込まれ、または分散され、あるいは挟み込まれた構造
をとる方法、溶融しないフィルムが接着剤フィルムに挟
み込まれた構造をとる方法などがある。The structure containing a substance that does not melt at the temperature at which the adhesive is heat-sealed includes a method in which the adhesive is embedded in the fibers of the substance that does not melt or the pores of the porous body, and a method in which the fiber or the porous material is used. A method in which the body takes a structure sandwiched by an adhesive film, a method in which a particulate non-melting substance is embedded or dispersed in the adhesive, or a structure in which the body is sandwiched, or a film that does not melt is sandwiched by the adhesive film There is a method to take the structure.
【００１３】[0013]
【発明の実施の形態】以下、実施例に基づき本発明を具
体的に説明する。。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on embodiments. .
【００１４】先ず、本発明電池の発電要素を構成する材
料について説明する。正極には、集電体となるアルミニ
ウム箔上に正極活物質を塗布し、電極形状に打ち抜いた
ものを用いた。正極活物質としては、リチウム含有遷移
金属酸化物、例えば、スピネル型マンガン酸リチウム
（ＬｉＭｎＯ4 ）、ニッケル酸リチウムなどが挙げられ
るが、これらに限定されるものではない。First, the materials constituting the power generating element of the battery of the present invention will be described. As the positive electrode, one obtained by applying a positive electrode active material on an aluminum foil serving as a current collector and punching it into an electrode shape was used. Examples of the positive electrode active material include, but are not limited to, lithium-containing transition metal oxides, such as spinel-type lithium manganate (LiMnO 4 ) and lithium nickelate.
【００１５】負極には、集電体となる電解銅箔上に負極
活物質を塗布し、電極形状に打ち抜いたものを用いた。
負極活物質としては、メソカーボンマイクロビーズ、コ
ークス、ハードカーボンなどの炭素材が挙げられるが、
これらに限定されるものではない。The negative electrode was prepared by applying a negative electrode active material on an electrolytic copper foil serving as a current collector and punching it into an electrode shape.
Examples of the negative electrode active material include mesocarbon microbeads, coke, and carbon materials such as hard carbon.
It is not limited to these.
【００１６】電解質には、ゲル状にしたポリマー電解質
を用いた。電解質としては、エチレンカーボネート、ジ
メチルカーボネート、ジエチルカーボネート、エチルメ
チルカーボネート、プロピレンカーボネート、スルホラ
ン、γ−ブチロラクトンなどの単独または混合溶媒に、
ＬｉＰＦ6 ，ＬｉＢＦ4 ，ＬｉＣｌＯ4 、リチウムビス
−トリフルオロメタンスルホニルイミドなどの支持塩を
溶解した電解液、あるいは、これらの電解液とポリエチ
レンオキシド、ポリアクリロニトリル、ポリ弗化ビニリ
デンなどの高分子とのゲル状電解質などが挙げられる
が、これらに限定されるものではない。As the electrolyte, a gelled polymer electrolyte was used. As the electrolyte, ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, propylene carbonate, sulfolane, a single or mixed solvent such as γ-butyrolactone,
An electrolytic solution in which a supporting salt such as LiPF 6 , LiBF 4 , LiClO 4 or lithium bis-trifluoromethanesulfonylimide is dissolved, or a gel of such an electrolytic solution and a polymer such as polyethylene oxide, polyacrylonitrile, or polyvinylidene fluoride Electrolyte, and the like, but are not limited thereto.
【００１７】セパレータとしては、ポリプロピレン不織
布にポリマー電解質前駆体を含浸させ、それに電子線を
照射することにより得られたゲル状フィルムを用いた。
セパレータについても、特に限定されず、従来から使用
されているポリエチレン微多孔膜、ポリ弗化ビニリデン
微多孔膜など種々のセパレータを用いることができる。As a separator, a gel film obtained by impregnating a polypropylene nonwoven fabric with a polymer electrolyte precursor and irradiating it with an electron beam was used.
The separator is not particularly limited, and various separators such as a conventionally used microporous polyethylene membrane and a microporous polyvinylidene fluoride membrane can be used.
【００１８】次に、本発明の接着剤の配置方法を図によ
って説明する。図１は接着剤の配置方法を示した図であ
り、図４は完成電池の外観図である。積層された電極群
は、正極・負極各々の集電体の一部にリード端子３が取
り付けられている。アルミラミネートシート５は、熱融
着性樹脂の貼り合わされた面を上にし、その上に電極群
を配置する。リード端子３のうち、封口部６によって挟
まれる部分に接着剤４を配置する。図１は、この段階の
様子を示してある。Next, the method for arranging the adhesive according to the present invention will be described with reference to the drawings. FIG. 1 is a view showing a method of disposing an adhesive, and FIG. 4 is an external view of a completed battery. In the stacked electrode group, a lead terminal 3 is attached to a part of the current collector of each of the positive electrode and the negative electrode. The aluminum laminate sheet 5 has the surface to which the heat-fusible resin is attached facing upward, and the electrode group is disposed thereon. The adhesive 4 is arranged in a portion of the lead terminal 3 that is sandwiched between the sealing portions 6. FIG. 1 shows the state at this stage.
【００１９】接着剤４は、リード端子の両面にそれぞれ
配置されることが好ましい。接着剤４の配置の方法とし
ては、図１のように二本のリード端子３を橋渡しするよ
うに配置してもよいし、二本のリード端子３の各々に別
個に配置してもよい。また、リード端子３の必要な部分
に本発明の接着剤４をあらかじめ熱で被覆しておいても
よい。別途用意した接着剤４の形態や配置方法は、これ
らの例示に限定されるものではない。Preferably, the adhesive 4 is disposed on both sides of the lead terminal. As a method of disposing the adhesive 4, the two lead terminals 3 may be disposed so as to bridge as shown in FIG. 1 or may be disposed separately for each of the two lead terminals 3. Further, a necessary portion of the lead terminal 3 may be previously coated with the adhesive 4 of the present invention by heat. The form and arrangement method of the separately prepared adhesive 4 are not limited to these examples.
【００２０】次に、上部に同じ外形寸法のアルミラミネ
ートシート５を熱融着性樹脂の貼り合わされた面を下に
して配置し、次いで５の周辺部をヒートシール法により
封口する。ラミネートパックの中身は、一対の正極と負
極からなる単セルとしてもよいし、図２のように必要に
応じて積層を繰り返すことで電池の容量を調整した極群
を配置してもよい。また、図３のように帯状の正極と負
極を重ねて巻き込んだ極群を配置してもよい。ラミネー
トパック電池の容量を調整するための電極の構造や配置
方法は、これらの例示に限定されるものではない。Next, an aluminum laminated sheet 5 having the same external dimensions is placed on the upper side with the surface to which the heat-fusible resin is bonded facing down, and then the periphery of 5 is sealed by a heat sealing method. The contents of the laminate pack may be a single cell composed of a pair of a positive electrode and a negative electrode, or an electrode group in which the capacity of the battery is adjusted by repeating lamination as necessary as shown in FIG. Further, as shown in FIG. 3, a pole group in which a strip-shaped positive electrode and a strip-shaped negative electrode are overlapped and wound may be arranged. The structure and arrangement of the electrodes for adjusting the capacity of the laminate pack battery are not limited to these examples.
【００２１】次に、本発明の接着剤の製造方法を具体的
に説明する。Next, the method for producing the adhesive of the present invention will be specifically described.
【００２２】モレキュラーシーブ５Ａを自動乳鉢で粉砕
し、２μｍ未満の微粉末をふるいで分取し、ゼオライト
微粉末とした。市販の厚さ３０μｍの変成ポリプロピレ
ンシートを数センチ角に切り出し二つ折りにし、分取し
た微粉末を挟み込み、さらにテフロンコーティングした
ガラスクロスで両側を挟み、２２０℃に熱した二枚のス
テンレス板でホットプレスした。得られた材料を縦１０
ｍｍ、横２５ｍｍに切り出し、接着剤シートを得た。こ
の接着剤シートの厚みは約１００μｍであった。この接
着剤シートを用いて前記方法で電池を作成し、その電池
を本発明電池１とする。The molecular sieve 5A was pulverized in an automatic mortar, and a fine powder of less than 2 μm was sieved and fractionated to obtain a fine zeolite powder. A commercially available modified polypropylene sheet having a thickness of 30 μm is cut into several centimeters, cut into two pieces, sandwiched between finely divided powders, sandwiched on both sides with a glass cloth coated with Teflon, and heated with two stainless steel plates heated to 220 ° C. Pressed. The obtained material is vertically 10
mm and a width of 25 mm to obtain an adhesive sheet. The thickness of this adhesive sheet was about 100 μm. Using this adhesive sheet, a battery is prepared by the method described above, and the battery is referred to as Battery 1 of the present invention.
【００２３】厚さ１ｍｍのポリカーボネート板を遊星ボ
ールミルで一昼夜粉砕し、４μｍ未満の微粉末をふるい
で分取し、ポリカーボネート微粉末とした。市販の厚さ
３０μｍの変成ポリプロピレンを数センチ角に切り出し
二つ折りにし、分取した微粉末を挟み込み、さらにテフ
ロンコーティングしたガラスクロスで両側を挟み、２２
０℃に熱した二枚のステンレス板でホットプレスした。
得られた材料を縦１０ｍｍ、横２５ｍｍに切り出し、接
着剤シートを得た。この接着剤シートの厚みは約１２０
μｍであった。この接着剤シートを用いて前記方法で電
池を作成し、その電池を本発明電池２とする。A 1 mm-thick polycarbonate plate was ground with a planetary ball mill for 24 hours, and fine powder having a size of less than 4 μm was sieved to obtain a fine polycarbonate powder. A commercially available denatured polypropylene having a thickness of 30 μm is cut into a few centimeters, folded in half, sandwiched with the fine powder, and sandwiched on both sides with a Teflon-coated glass cloth.
Hot pressing was performed using two stainless plates heated to 0 ° C.
The obtained material was cut into a length of 10 mm and a width of 25 mm to obtain an adhesive sheet. The thickness of this adhesive sheet is about 120
μm. Using this adhesive sheet, a battery is prepared by the above method, and the battery is referred to as Battery 2 of the present invention.
【００２４】市販の厚さ３０μｍの変成ポリプロピレン
シートを数センチ角に切り出し二つ折りにし、繊維径約
３０μｍの微細ガラス繊維を薄く伸ばして挟み込み、さ
らにテフロンコーティングしたガラスクロスで両側を挟
み、２２０℃に熱した二枚のステンレス板でホットプレ
スした。得られた材料を縦１０ｍｍ、横２５ｍｍに切り
出し、接着剤シートを得た。この接着剤シートの厚みは
約１３０μｍであった。この接着剤シートを用いて前記
方法で電池を作成し、その電池を本発明電池３とする。A commercially available modified polypropylene sheet having a thickness of 30 μm is cut into several centimeters and folded in half. Fine glass fibers having a fiber diameter of about 30 μm are thinly stretched and sandwiched. Further, both sides are sandwiched between glass cloths coated with Teflon. Hot pressing was performed with two heated stainless steel plates. The obtained material was cut into a length of 10 mm and a width of 25 mm to obtain an adhesive sheet. The thickness of this adhesive sheet was about 130 μm. Using this adhesive sheet, a battery is prepared by the method described above, and the battery is referred to as Battery 3 of the present invention.
【００２５】２０μｍの厚さのポリエチレンテレフタレ
ートフィルムを５ｍｍ幅のテープ状に切り出し、市販の
厚さ３０μｍの２枚の変成ポリプロピレンで挟み、市販
のヒートシール機を用いて加熱した。ポリエチレンテレ
フタレートのテープが芯材として長さ方向に含まれるよ
うに縦１０ｍｍ横２５ｍｍに切り出し、接着剤シートを
得た。この接着剤シートの厚みは約７０μｍであった。
この接着剤シートを用いて前記方法で電池を作成し、そ
の電池を本発明電池４とする。A polyethylene terephthalate film having a thickness of 20 μm was cut into a tape having a width of 5 mm, sandwiched between two modified polypropylene sheets having a thickness of 30 μm, and heated using a commercially available heat sealing machine. The tape was cut into a length of 10 mm and a width of 25 mm so that a tape of polyethylene terephthalate was included in the length direction as a core material to obtain an adhesive sheet. The thickness of this adhesive sheet was about 70 μm.
Using this adhesive sheet, a battery is prepared by the above method, and the battery is referred to as Battery 4 of the present invention.
【００２６】ステンレス製ビーカーに市販の電解二酸化
マンガンを入れ、バルブ付き耐圧密閉ステンレス容器に
入れた後、２００℃に熱しながらトラップを経由した拡
散ポンプに繋ぎ、密閉ステンレス容器内を１０-6ｔｏｒ
ｒに減圧した。１６時間経過後に取り出し、０．１〜
０．３μｍに微粉化された二酸化マンガン粉末を得た。
市販の厚さ３０μｍの変成ポリプロピレンシートを数セ
ンチ角に切り出し、二つ折りにし、分取した微粉末を挟
み込み、さらにテフロンコーティングしたガラスクロス
で両側を挟み、２２０℃に熱した二枚のステンレス板で
ホットプレスした。得られた材料を縦１０ｍｍ、横２５
ｍｍに切り出し、接着剤シートを得た。この接着剤シー
トの厚みは約８０μｍであった。この接着剤シートを用
いて前記方法で電池を作成し、その電池を本発明電池５
とする。A commercially available electrolytic manganese dioxide is placed in a stainless steel beaker, placed in a pressure-resistant closed stainless steel container with a valve, connected to a diffusion pump via a trap while heating to 200 ° C., and the inside of the closed stainless steel container is filled with 10 -6 torr.
The pressure was reduced to r. Remove after 16 hours, 0.1 ~
Manganese dioxide powder pulverized to 0.3 μm was obtained.
A commercially available modified polypropylene sheet having a thickness of 30 μm is cut into a few centimeters square, folded in two, sandwiched by fine powder, and sandwiched on both sides with a glass cloth coated with Teflon, and then with two stainless steel plates heated to 220 ° C. Hot pressed. The obtained material is 10 mm long and 25 mm wide.
mm to obtain an adhesive sheet. The thickness of this adhesive sheet was about 80 μm. Using this adhesive sheet, a battery was prepared by the method described above, and the battery was used as the battery 5 of the present invention.
And
【００２７】１５μｍの厚さのポリプロピレン不織布を
５ｍｍ幅のテープ状に切り出し、市販の厚さ３０μｍの
２枚の変成ポリプロピレンで挟み、市販のヒートシール
機を用いて加熱した。ポリエチレンテレフタレートのテ
ープが芯材として長さ方向に含まれるように縦１０ｍ
ｍ、横２５ｍｍに切り出し、接着剤シートを得た。この
接着剤シートの厚みは約７０μｍであった。この接着剤
シートを用いて前記方法で電池を作成し、その電池を本
発明電池６とする。A 15 μm-thick polypropylene nonwoven fabric was cut into a tape having a width of 5 mm, sandwiched between two 30 μm-thick modified polypropylene sheets, and heated using a commercially available heat sealing machine. 10m long so that polyethylene terephthalate tape is included in the length direction as a core material
m, 25 mm wide to obtain an adhesive sheet. The thickness of this adhesive sheet was about 70 μm. Using this adhesive sheet, a battery is prepared by the method described above, and the battery is referred to as Battery 6 of the present invention.
【００２８】熱融着される温度で溶融しない物質を含有
しない接着剤として、市販の厚さ５０μｍおよび厚さ１
００μｍの変成ポリプロピレンシートを接着剤として用
い、前記と同様の方法で電池を作成し、その電池をそれ
ぞれ比較電池１、比較電池２とした。As an adhesive which does not contain a substance which does not melt at a temperature at which heat fusion is performed, a commercially available adhesive having a thickness of 50 μm and a thickness of 1
Batteries were prepared in the same manner as described above using a modified polypropylene sheet of 00 μm as an adhesive, and the batteries were designated as Comparative Battery 1 and Comparative Battery 2, respectively.
【００２９】次に、本発明の効果を確認するため、完成
電池の評価試験を行った。各々の上記電池について１０
個づつの完成電池を選び、初期充電を行った。条件は定
電流定電圧充電０．２Ｃ、４．２Ｖ、１０時間とした。
充電後１６時間放置し、電池電圧を測定した。測定結果
に基づき、電池電圧が４．１Ｖ以上のグループと４．０
Ｖ未満のグループに分け、後者を短絡不良が発生した電
池と見なした。結果を表１に示す。Next, in order to confirm the effect of the present invention, an evaluation test of the completed battery was performed. 10 for each of the above batteries
Each completed battery was selected and initially charged. The conditions were constant current and constant voltage charging of 0.2 C, 4.2 V, and 10 hours.
After charging, the battery was left for 16 hours, and the battery voltage was measured. Based on the measurement results, the battery voltage group was 4.1 V or higher and the battery voltage was 4.0
The batteries were divided into groups of less than V, and the latter was regarded as a battery having a short circuit failure. Table 1 shows the results.
【００３０】[0030]
【表１】 [Table 1]
【００３１】表１から明らかなように本発明電池１〜６
は、比較電池１、２に比べて短絡不良の発生を大幅に防
止することができる。As is apparent from Table 1, the batteries 1 to 6 of the present invention were obtained.
Can significantly prevent the occurrence of short-circuit failure as compared with the comparative batteries 1 and 2.
【００３２】[0032]
【発明の効果】以上説明したごとく、本発明は、接着剤
へのフィラーの混入により、ヒートシール時に発生する
接着剤の亀裂の発生を抑えることでリード端子部分の短
絡不良を低減させ、高い生産効率を提供することができ
るので、本発明の効果は極めて大である。As described above, the present invention reduces the short-circuit failure of the lead terminal portion by suppressing the generation of cracks in the adhesive which occurs at the time of heat sealing by mixing the filler into the adhesive. Since the efficiency can be provided, the effect of the present invention is extremely large.
【図１】接着剤の配置方法について示した図である。FIG. 1 is a diagram showing a method of arranging an adhesive.
【図２】発電要素の極群の積層方法について示した図で
ある。FIG. 2 is a diagram showing a method of stacking pole groups of a power generation element.
【図３】発電要素の極群の積層方法について示した図で
ある。FIG. 3 is a diagram illustrating a method of stacking pole groups of a power generation element.
【図４】本発明電池の完成図である。FIG. 4 is a completed drawing of the battery of the present invention.
３ リード端子 ４ 接着剤 ５ アルミラミネートシート ６ 熱融着部分 3 Lead terminal 4 Adhesive 5 Aluminum laminated sheet 6 Heat-sealed part
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H011 AA03 AA09 CC02 CC06 CC10 DD13 EE04 FF04 GG01 HH02 HH08 HH09 HH11 HH19 JJ12 KK04 5H024 AA00 AA02 BB14 CC04 DD03 DD11 EE09 HH11 5H029 AJ12 AK03 AL06 AM02 AM03 AM05 AM07 AM16 BJ04 CJ05 DJ02 DJ03 DJ05 DJ15 DJ16 EJ05 EJ06 EJ08 EJ12 HJ14 ──────────────────────────────────────────────────続 き Continued on front page F-term (reference) DJ03 DJ05 DJ15 DJ16 EJ05 EJ06 EJ08 EJ12 HJ14
Claims (2)
において、熱融着される温度で溶融しない物質を含有す
る接着剤をリード端子周縁に配置して、該接着剤と該熱
融着樹脂とを接合させたラミネートパック電池。In a battery which is entirely sealed by a heat-sealing resin, an adhesive containing a substance which does not melt at a temperature at which the heat-sealing is performed is disposed on the periphery of a lead terminal, and the adhesive and the heat-sealing resin are disposed. And a laminated pack battery.
しない繊維状、粒子状、多孔体フィルム状、無孔体フィ
ルム状の中から選ばれた少なくともひとつの形状の物質
を含んでいる請求項１記載のラミネートパック電池。2. The adhesive according to claim 1, wherein the adhesive contains at least one substance selected from the group consisting of fibrous, particulate, porous film, and non-porous film that does not melt at a temperature at which the adhesive is thermally fused. The laminate pack battery according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16341299A JP4292490B2 (en) | 1999-06-10 | 1999-06-10 | Laminated pack battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16341299A JP4292490B2 (en) | 1999-06-10 | 1999-06-10 | Laminated pack battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000353504A true JP2000353504A (en) | 2000-12-19 |
| JP4292490B2 JP4292490B2 (en) | 2009-07-08 |
Family
ID=15773414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16341299A Expired - Fee Related JP4292490B2 (en) | 1999-06-10 | 1999-06-10 | Laminated pack battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4292490B2 (en) |
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