JPH10106531A - Packaged flat battery - Google Patents

Packaged flat battery

Info

Publication number
JPH10106531A
JPH10106531A JP8252711A JP25271196A JPH10106531A JP H10106531 A JPH10106531 A JP H10106531A JP 8252711 A JP8252711 A JP 8252711A JP 25271196 A JP25271196 A JP 25271196A JP H10106531 A JPH10106531 A JP H10106531A
Authority
JP
Japan
Prior art keywords
battery
package
conductive terminal
electrode
conductive
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.)
Withdrawn
Application number
JP8252711A
Other languages
Japanese (ja)
Inventor
Takashi Namikata
尚 南方
Masaaki Sasayama
昌聡 笹山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP8252711A priority Critical patent/JPH10106531A/en
Publication of JPH10106531A publication Critical patent/JPH10106531A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • 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

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a battery having excellent reliability, stability and safety by sealing conductive terminals, which pass through inside and outside a package and which are connected to a battery electrode layer for conduction, in side surfaces of the package. SOLUTION: Side surfaces 1 of a package of a packaged flat battery, which is formed of side surfaces 1, an upper surface 2 and a lower surface 3, are made of the resin insulating body. Conductive terminals 6. 6' are sealed in the side surfaces 1 of the package, and the conductive terminals 6, 6' and an electrode laminated body 4 are connected to each other for conduction. With this structure, since the side surfaces 1 of the package are formed of the resin insulating body, sealing is facilitated, and battery productivity can be improved, and while in the case where the upper surface 2 and the lower surface 3 or a part of the upper surface 2 and the lower surface 3 have conductive property, generation of short circuits can be prevented.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明はパッケージ扁平型電
池および組電池に関するものである。[0001] 1. Field of the Invention [0002] The present invention relates to a flat battery pack and a battery pack.

【０００２】[0002]

【従来の技術】現在、パソコン、携帯電話、ビデオカメ
ラなど種々の携帯機器に用いる電源として高エネルギー
密度電池が開発されている。この電池として繰り返し充
放電可能なリチウムイオン二次電池、ニッケル水素電
池、ニッケルカドミウム電池などが利用されている。特
にリチウムイオン二次電池はエネルギー密度が大きいこ
とが特徴であり、電池の小型軽量化が可能であるため活
発な開発が進められている。2. Description of the Related Art At present, high energy density batteries have been developed as power supplies for various portable devices such as personal computers, mobile phones and video cameras. As this battery, a lithium ion secondary battery, a nickel hydride battery, a nickel cadmium battery and the like which can be repeatedly charged and discharged are used. In particular, lithium ion secondary batteries are characterized by high energy density, and are being actively developed because the batteries can be reduced in size and weight.

【０００３】従来、リチウムイオン二次電池は電極間の
イオン移動媒体として電解液が用いられ、通常は電極と
多孔質セパレータの積層体に電解液が含浸された構造を
有する。このように電解液を用いる電池では液漏れを防
ぐため電池パッケージに重厚な金属材料が用いられてい
る。一方、固体電解質をイオン移動媒体とする電池は、
従来の電解液をイオン移動媒体とする電池に比べ、実質
的に液漏れがないため電池の信頼性、安全性が向上する
とともに薄膜化や積層体形成の容易さ、電池形態の自由
度が高いこと、パッケージの簡略化、軽量化が期待され
ている。Conventionally, a lithium ion secondary battery uses an electrolytic solution as an ion transfer medium between electrodes, and usually has a structure in which a laminate of an electrode and a porous separator is impregnated with the electrolytic solution. As described above, in a battery using an electrolytic solution, a heavy metal material is used for a battery package in order to prevent liquid leakage. On the other hand, batteries using a solid electrolyte as an ion transfer medium
Compared to a conventional battery using an electrolyte as an ion transfer medium, there is virtually no liquid leakage, improving the reliability and safety of the battery, making it easier to form thin films and laminates, and having a high degree of freedom in battery form. In addition, simplification of the package and weight reduction are expected.

【０００４】固体電解質を用いた電池は、シート状の電
極と固体電解質が積層された積層体や電極表面に高分子
固体電解質層を塗布形成後積層させた積層対を所定の形
状に加工して作製することができる。また、電極／高分
子固体電解質／電極の各層を塗工によって形成する方法
も提案されている。このように、シート積層や塗工など
の方法が採用できることから製造プロセスが量産性に優
れることが予想されている。また、従来の電解液系電池
で起こりうる液漏れが実質的に起こらないため製造工程
管理が容易であり、電極／固体電解質／電極積層体の直
列接続積層による高電圧化も期待されている。A battery using a solid electrolyte is formed by processing a laminate formed by laminating a sheet-like electrode and a solid electrolyte or a laminate formed by coating a polymer solid electrolyte layer on the electrode surface and then laminating the laminate into a predetermined shape. Can be made. A method of forming each layer of the electrode / polymer solid electrolyte / electrode by coating has also been proposed. As described above, since a method such as sheet lamination or coating can be adopted, it is expected that the production process is excellent in mass productivity. Further, since the liquid leakage that can occur in the conventional electrolyte battery does not substantially occur, the production process can be easily controlled, and a higher voltage is expected by series connection and lamination of the electrode / solid electrolyte / electrode laminate.

【０００５】上記の固体電解質電池は、通常、樹脂シー
トと金属シートが積層したラミネートポリマーシートで
パッケージされて用いられている。電池をパッケージし
て用いるためにはパッケージ内部の電極からパッケージ
外部への電流取り出し端子を設ける必要があり、通常は
電極端子をラミネートポリマーシートの封口部で挟み込
んで融着させる構造で電池が構成される。ところが、こ
の構造では電極端子部がパッケージ面からはみ出した構
造となり電池の小型化の支障となっていた。また、パッ
ケージの一部に空孔を設け、この空孔に電極積層体の集
電体面を密着させる構造の電池が提供されている（米国
特許第５４７８６６８号明細書）。ところがこれらの構
造の電池ではパッケージの電極端子封口部で電池内外の
リーク、工程中の電極端子の切断、導通不良などが起こ
り、これによってリチウム二次電池の性能低下が起こる
という問題もあった。The above-described solid electrolyte battery is usually used by being packaged with a laminated polymer sheet in which a resin sheet and a metal sheet are laminated. In order to use the battery as a package, it is necessary to provide a current extraction terminal from the electrode inside the package to the outside of the package.In general, the battery is configured with a structure in which the electrode terminal is sandwiched between the sealing portions of the laminated polymer sheet and fused. You. However, in this structure, the electrode terminal portions protrude from the package surface, which hinders miniaturization of the battery. Further, there is provided a battery having a structure in which a hole is provided in a part of a package and a current collector surface of an electrode laminate is closely attached to the hole (US Pat. No. 5,478,668). However, in the batteries having these structures, there is a problem that leakage occurs inside and outside of the battery, disconnection of the electrode terminals during the process, poor conduction, and the like at the electrode terminal sealing portion of the package, thereby lowering the performance of the lithium secondary battery.

【０００６】さらに、電池を誤って過充電した場合や充
電状態で電極端子を短絡させた場合、電極内部で発熱が
起こり電池の安全性を損なうことがある。この場合の安
全性確保のために電極端子にＰＴＣ素子（Positive Tem
perature Coefficient素子）を内蔵させ、高温時の電極
の導通を阻止する機能を付与させている。ポリマーパッ
ケージ電池においてもこのＰＴＣ素子を用いる試みがあ
る（米国特許第５４７８６６８号明細書）が電極積層体
集電体への接続加工が煩雑という問題があった。Further, when the battery is erroneously overcharged or when the electrode terminals are short-circuited in a charged state, heat is generated inside the electrode, which may impair the safety of the battery. In order to ensure safety in this case, a PTC element (Positive Tem
perature Coefficient element) to provide a function to prevent conduction of electrodes at high temperatures. Attempts have been made to use this PTC element also in a polymer package battery (US Pat. No. 5,478,668), but there has been a problem that connection processing to the electrode laminate current collector is complicated.

【０００７】[0007]

【発明が解決しようとする課題】本発明は、上記の問題
を解決し、封止性、加工性に優れたパッケージ構造によ
り信頼性、安定性、安全性に優れた電池を得るととも
に、効率良く製造することのできる高性能電池を提供す
ることを目的とする。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, and obtains a battery having excellent reliability, stability and safety by using a package structure having excellent sealing properties and processability, and efficiently using the same. It is an object to provide a high-performance battery that can be manufactured.

【０００８】[0008]

【課題を解決するための手段】本発明者らは、固体電解
質を用いた固体電池のパッケージ材料および構造の研究
を進め、本発明を完成した。本発明は、 （１） イオン輸送層を挟んで正極および負極が接合し
てなる単位積層体構造を有するパッケージ電池におい
て、該パッケージが上面、下面、および樹脂絶縁体で形
成される側面から構成され、該側面に、パッケージ内外
に貫通する、電池電極層と導電接合する導電性端子が封
入されていることを特徴とするパッケージ扁平型電池。 （２） 上記１のパッケージ扁平型電池の導電性端子の
少なくとも一部を電気抵抗が一定温度以上で急激に上昇
し導電性端子の導通を遮断することのできる金属的伝導
体粒子／絶縁性ポリマーの混合体で形成することを特徴
とする電池。 （３） 上記１のパッケージ扁平型電池を２個以上直列
に積層してなる組電池の導電性端子の少なくとも一部が
電気抵抗が一定温度以上で急激に上昇し導電性端子の導
通を遮断することのできる金属的伝導体粒子／絶縁性ポ
リマーの混合体で形成されていることを特徴とする組電
池。Means for Solving the Problems The present inventors have studied the package material and structure of a solid-state battery using a solid electrolyte, and have completed the present invention. The present invention provides (1) a package battery having a unit laminate structure in which a positive electrode and a negative electrode are joined with an ion transport layer interposed therebetween, wherein the package includes an upper surface, a lower surface, and a side surface formed of a resin insulator. A flat package type battery in which a conductive terminal penetrating into and out of a package and electrically conductively bonding to a battery electrode layer is sealed in the side surface. (2) Metallic conductive particles / insulating polymer capable of interrupting conduction of the conductive terminal by rapidly increasing the electrical resistance of at least a part of the conductive terminal of the flat packaged battery of the above 1 at a certain temperature or higher. A battery formed of a mixture of the following. (3) At least a part of the conductive terminals of the battery pack formed by stacking two or more of the flat package batteries of the above-mentioned one in series has a sudden increase in electric resistance at a certain temperature or higher and interrupts conduction of the conductive terminals. A battery pack formed of a mixture of metallic conductive particles / insulating polymer that can be used.

【０００９】以下、本発明について詳細に説明する。本
発明のパッケージ扁平型電池におけるパッケージは、上
面、下面および側面により構成され、該側面は樹脂絶縁
体からなることが特徴である。この側面が樹脂で形成さ
れていることにより、従来のパッケージ電池における金
属同士の封口に比べ、封口が容易であり電池生産性の向
上を図ることができる。また、側面が樹脂絶縁体で形成
されていることから、上面と下面または上面と下面の一
部が導電性を有する場合、短絡防止を図ることができ
る。この側面は、円柱状または角柱状の単一パーツで形
成することもできるが、複数個のパーツに分割し、電池
の組立を行う過程でこの分割したパーツを一体化するこ
とも可能である。この側面を構成するパーツとパーツと
の間に、または側面を構成するパーツ中に導電性端子を
封入することにより、導電性端子と電池電極層とを導電
接合させて使用できることも本発明の電池の特徴であ
る。さらに、パーツ中に封入された導電性端子と電池電
極層の導電接合を行った後に、分割されているパーツを
一体化して側面を作成し、その後に上面、下面と接合し
て電池のパッケージを行うこともできる。Hereinafter, the present invention will be described in detail. The package of the flat package type battery according to the present invention has an upper surface, a lower surface, and side surfaces, and the side surfaces are made of a resin insulator. Since this side surface is formed of resin, the sealing is easier and the productivity of the battery can be improved as compared with the sealing between metals in a conventional package battery. Further, since the side surface is formed of a resin insulator, when the upper surface and the lower surface or a part of the upper surface and the lower surface have conductivity, a short circuit can be prevented. This side surface can be formed of a single columnar or prismatic part, but can also be divided into a plurality of parts, and these divided parts can be integrated in the process of assembling the battery. The battery according to the present invention can also be used by encapsulating a conductive terminal between the parts constituting the side surface or in the parts constituting the side surface so that the conductive terminal and the battery electrode layer can be conductively joined. It is a feature of. Furthermore, after conducting conductive joining of the conductive terminal encapsulated in the parts and the battery electrode layer, the divided parts are integrated to create a side surface, and then joined to the upper and lower surfaces to form a battery package. You can do it too.

【００１０】この側面に導電性端子を封入する方法とし
ては、側面に用いられる樹脂が熱可塑性樹脂の場合に
は、例えば、パーツとパーツとの間に導電性端子を挟ん
で熱圧着する方法、一つのパーツを二枚の樹脂シートで
形成し、導電性端子を樹脂シートの間に挟んで熱圧着す
る方法等が挙げられる。もちろん側面に孔を開け、導電
性端子を通した後に接着剤で封入することも可能であ
る。[0010] As a method of encapsulating the conductive terminal on the side surface, when the resin used for the side surface is a thermoplastic resin, for example, a method of thermocompression bonding by sandwiching the conductive terminal between the parts, There is a method in which one part is formed of two resin sheets, and a conductive terminal is sandwiched between the resin sheets and thermocompression-bonded. Of course, it is also possible to make a hole in the side surface, pass through the conductive terminal, and then seal with an adhesive.

【００１１】本発明の側面の形成に用いることのできる
樹脂絶縁体としては、ポリエチレン、ポリプロピレン、
ポリ（エチレン−ビニルアルコール）共重合体、アイオ
ノマー樹脂、ナイロン、芳香族系ポリアミド、芳香族系
ポリエステル、ポリフェニレンオキシド、ポリオキシメ
チレン、ポリカーボネートなどを挙げることができる。
この中でもポリエチレン、ポリプロピレン、ポリ（エチ
レン−ビニルアルコール）共重合体、ポリフェニレンオ
キシド、ポリオキシメチレンが好ましい。As the resin insulator that can be used for forming the aspect of the present invention, polyethylene, polypropylene,
Examples thereof include poly (ethylene-vinyl alcohol) copolymer, ionomer resin, nylon, aromatic polyamide, aromatic polyester, polyphenylene oxide, polyoxymethylene, and polycarbonate.
Among them, polyethylene, polypropylene, poly (ethylene-vinyl alcohol) copolymer, polyphenylene oxide, and polyoxymethylene are preferable.

【００１２】本発明で用いられているパッケージの上面
および下面の形状はシート状もしくは皿状であることが
好ましく、上面、下面を導電性端子の一部として用いる
場合は、金属材料、金属−樹脂複合材料などの導電材料
を使用する。具体例として、ステンレス、アルミニウ
ム、銅、鉄などの金属、カーボン、表面を良導電性材料
でメッキ、蒸着メタライズ加工された樹脂、良導電性材
料のフィラーを樹脂に分散した樹脂複合体が挙げられ
る。また、この上面、下面の面内に導電性領域と非導電
性領域を設け、導電性領域によって電池電極層と導電接
合させ外部への電流取り出しを可能とすることもでき
る。これら上面、下面を電池電極層と導電接合させるこ
とによって導電性端子として用いる場合、導電接合を向
上させるため上面、下面に凹凸形状、エンボス加工を付
与することが好ましい。The upper and lower surfaces of the package used in the present invention are preferably sheet-shaped or dish-shaped. When the upper and lower surfaces are used as a part of the conductive terminal, a metal material, metal-resin is used. Use a conductive material such as a composite material. Specific examples include a metal such as stainless steel, aluminum, copper, and iron, carbon, a resin whose surface is plated with a good conductive material, a metallized resin, and a resin composite in which a filler of a good conductive material is dispersed in the resin. . In addition, a conductive region and a non-conductive region may be provided in the upper and lower surfaces, and the conductive region may be conductively bonded to the battery electrode layer so that current can be extracted to the outside. When these upper and lower surfaces are used as a conductive terminal by being electrically conductively bonded to the battery electrode layer, it is preferable that the upper and lower surfaces are provided with a concavo-convex shape and embossing to improve the conductive bonding.

【００１３】また、これら上面および下面には、パッケ
ージ扁平型電池作製工程において樹脂絶縁体からなる側
面と接合させるため、側面との接合部分に密着性向上の
ため樹脂コーテイングすることが好ましい。本発明にお
いては、側面に導電性端子を封入していることから、上
面および下面は必ずしも導電性を有する必要はなく、樹
脂、セラミックなどの絶縁性材料を用いることもでき
る。ただし、導電性材料を用いることは、電池電極層と
導電接合させて導電性端子として用いることが可能にな
るばかりでなく、電池内部からの放熱を促進できること
から好ましい。[0013] In addition, since these upper and lower surfaces are joined to a side surface made of a resin insulator in a package flat battery manufacturing process, it is preferable to apply a resin coating to a joint portion with the side surface to improve adhesion. In the present invention, since the conductive terminals are sealed on the side surfaces, the upper surface and the lower surface do not necessarily have to have conductivity, and an insulating material such as resin or ceramic may be used. However, the use of a conductive material is preferable because not only can it be conductively bonded to the battery electrode layer to be used as a conductive terminal, but also heat dissipation from the inside of the battery can be promoted.

【００１４】また、正極、負極を、それぞれ、導電性材
料からなる上面、下面に導電接合した扁平型電池を作成
すれば、この電池を単位セルとして単純積層により複数
個の電池が直列または並列接続された組電池が構成でき
る。本発明のパッケージにおいて上面、側面、下面の接
合方法として、例えば熱可塑性樹脂材料を接合部表面に
有する場合は熱融着により行うことができる。また、接
着材により接合させることもできる。Further, if a flat battery in which a positive electrode and a negative electrode are conductively bonded to the upper surface and the lower surface, respectively, made of a conductive material, is prepared, a plurality of batteries are connected in series or in parallel by simple lamination using this battery as a unit cell. The assembled battery can be configured. In the package of the present invention, the upper surface, the side surface, and the lower surface can be joined by, for example, heat fusion when a thermoplastic resin material is provided on the joint surface. In addition, they can be joined by an adhesive.

【００１５】また、本発明の扁平型電池において、導電
性端子の一部をＰＴＣ素子材料で形成することによって
導電性端子の高温時の電流遮断機能を付与することがで
きる。この高温時の電流遮断により、たとえば、過放
電、外部短絡などの異常作動を防止できるため電池の安
全性を向上させることができる。このＰＴＣ素子材料
は、通常、導電性粒子、フィラーが樹脂バインダーで分
散されているものであり、樹脂バインダーの熱膨張係数
が導電体粒子より大きいことを利用して高温において導
電性粒子間の導通を遮断することができるものである。Further, in the flat battery according to the present invention, by forming a part of the conductive terminal with a PTC element material, a current interrupting function at a high temperature of the conductive terminal can be provided. By interrupting the current at this high temperature, for example, abnormal operations such as overdischarge and external short circuit can be prevented, so that the safety of the battery can be improved. This PTC element material usually has conductive particles and fillers dispersed in a resin binder. By utilizing the fact that the coefficient of thermal expansion of the resin binder is larger than that of the conductive particles, conduction between the conductive particles at high temperatures is achieved. Can be cut off.

【００１６】本発明の電池構造において、上面または／
および下面に電池電極層と導電接合された導電性部位を
持つ場合、これら上面または／および下面の導電性部位
にＰＴＣ素子シートを貼り合わせ、ＰＴＣ素子を通じて
電流の出し入れを行う構造にすればＰＴＣ素子を作動さ
せることができる。また、側面に導電性端子を封入した
構造である場合、側面の導電性端子封入箇所の内側また
は外側表面にＰＴＣ素子を接合させることにより作動可
能であり、これらも本発明に含まれるものである。本発
明のパッケージ扁平型電池を正極面側と負極面側とが重
なり合う構造で積層した組電池においては、図３に例示
するように正極面側と負極面側の間にＰＴＣ素子を配置
させて組電池を作製することもできる。In the battery structure of the present invention, the upper surface and / or
In the case where the PTC element sheet has a structure in which a PTC element sheet is bonded to the upper and / or lower surface of the conductive part and has a conductive part which is electrically connected to the battery electrode layer on the lower surface, a current is passed through the PTC element. Can be activated. Further, in the case of a structure in which the conductive terminal is sealed on the side surface, it can be operated by joining a PTC element to the inside or outside surface of the conductive terminal sealing portion on the side surface, and these are also included in the present invention. . In the assembled battery in which the flat packaged battery of the present invention is stacked in a structure in which the positive and negative electrode surfaces overlap each other, a PTC element is disposed between the positive and negative electrode surfaces as illustrated in FIG. An assembled battery can also be manufactured.

【００１７】また、本発明のパッケージ扁平型電池にお
いて、導電性端子と、電池電極層または電極集電体とを
導電接合することによって電池が作動するが、この接合
方法として、圧着、密着、かしめにより直接接触させる
方法、導電性接着剤による方法、スポット溶接、超音波
溶接などの溶接方法などが挙げられる。この直接接触の
導通を良好にするため、電池電極層および／または導電
性端子の一部に凹凸形状を設けることができる。In the flat-packaged battery of the present invention, the battery is operated by conductively bonding the conductive terminal to the battery electrode layer or the electrode current collector. The bonding method includes crimping, adhesion, and caulking. , A method using a conductive adhesive, a welding method such as spot welding, ultrasonic welding and the like. In order to improve the continuity of the direct contact, the battery electrode layer and / or a part of the conductive terminal can be provided with an uneven shape.

【００１８】通常のポリマーパッケージ扁平状電池にお
いてパッケージシール部の面積が大きく体積利用率が低
く留まっている。これに比較して本発明の電池は、パッ
ケージ側面部が樹脂で封口された構造であり、この側面
部の肉厚を薄くできるので、かさばらず、高エネルギー
密度電池が作製できる。また電池構造のデザイン性に優
れるので本発明の電池を単セルまたは複数セルパック電
池として利用することができる。本発明の電池は、特に
リチウムイオン電池に好適であるが、これにとどまらず
鉛電池、アルカリ電池、ニッケル水素電池など種々の電
池に応用できるため産業上有用である。In a normal polymer package flat battery, the area of the package seal portion is large and the volume utilization rate remains low. In comparison with this, the battery of the present invention has a structure in which the side surface of the package is sealed with a resin, and since the thickness of the side surface can be reduced, a high energy density battery can be manufactured without being bulky. Further, since the battery structure is excellent in design, the battery of the present invention can be used as a single-cell or multiple-cell battery. The battery of the present invention is particularly suitable for a lithium ion battery, but is not limited to this and is industrially useful because it can be applied to various batteries such as a lead battery, an alkaline battery, and a nickel hydrogen battery.

【００１９】[0019]

【発明の実施の形態】以下実施例で本発明を詳細に説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

【００２０】[0020]

【実施例１】ＬｉＣｏＯ2 シート（幅９３ｍｍ、バイン
ダーにポリフッ化ビニリデン、膜厚１１０μｍ片面塗
工、アルミニウム集電体）、ニードルコークスシート
（幅９３ｍｍ、スチレン−ブタジエンラテックス、膜厚
１２５μｍ片面塗工、銅集電体）をそれぞれ正極、負極
に用い、ポリフッ化ビニリデン−ヘキサフルオロプロピ
レン共重合体発泡体シートに電解液を含浸させた固体電
解質（幅９５ｍｍ）とともに積層した電極積層体を作製
した。該積層体シートを１１０ｍｍ毎に４回折り曲げ、
折り曲げ積層体の上面にアルミニウム集電体が、下面に
銅集電体を有する構造に加工した。ポリエチレン製角形
バットを切断して外寸１００×１２０ｍｍ、高さ２ｍ
ｍ、肉厚約２ｍｍのフレームを作製した。このポリエチ
レン製フレームの一辺を切断してコの字型に加工した。
厚さ１ｍｍのポリエチレンシートを幅２ｍｍ、長さ１０
０ｍｍに切断した短冊を２個用い、この短冊間に幅１０
ｍｍ幅、長さ２５ｍｍのステンレスシート（厚さ１０μ
ｍ）の長手方向を短冊に直交させる方向に２枚それぞれ
を左右端から２０ｍｍの部分にステンレスシートの耳が
５ｍｍでる構造で配置、加熱して一体化させ、さらに前
記のコの字部分に配置して熱封止してフレームを作製し
た。上面および下面シートとしてポリエチレン／アルミ
ニウム／ポリエチレンテレフタレート積層シートを用
い、１００×１２０ｍｍのシートを切断した。下面シー
トとフレーム部を熱圧着させて形成した容器に前記の電
極積層体を入れ、この電極積層体のアルミニウム集電体
表面、金属銅集電体表面にフレームのステンレスシート
がそれぞれ接触するように配置し、短絡防止のためステ
ンレスシートのフレーム近傍１０ｍｍに絶縁テープを貼
りつけた。次いで上面シートを側面フレーム上に配置し
て加熱プレスして封口して電池を作製した。ステンレス
シートの耳を充放電機の電極端子に接続して充放電試験
をおこなった結果、初回放電量１．３２Ａｈ、平均電圧
３．６Ｖ（４．７６Ｗｈ）であり繰り返し充放電が可能
であった。Example 1 LiCoO 2 sheet (width 93 mm, binder polyvinylidene fluoride, thickness 110 μm, single-sided coating, aluminum current collector), needle coke sheet (width 93 mm, styrene-butadiene latex, thickness 125 μm, single-sided coating) Using a copper current collector as a positive electrode and a negative electrode, an electrode laminate was prepared by laminating a polyvinylidene fluoride-hexafluoropropylene copolymer foam sheet with a solid electrolyte (95 mm wide) impregnated with an electrolytic solution. Bending the laminated sheet four times every 110 mm,
The folded laminate was processed into a structure having an aluminum current collector on the upper surface and a copper current collector on the lower surface. Cut a square bat made of polyethylene and measure outside dimensions 100 x 120mm, height 2m
m, a frame having a thickness of about 2 mm was produced. One side of this polyethylene frame was cut and processed into a U-shape.
A 1mm thick polyethylene sheet is 2mm wide and 10mm long
Using two strips cut to 0 mm, a width of 10 mm
mm width, length 25mm stainless steel sheet (thickness 10μ)
m) The two pieces are arranged in a direction in which the longitudinal direction is perpendicular to the strip, and the stainless steel sheet is arranged with a structure in which the ears of the stainless sheet are 5 mm at 20 mm from the left and right ends, heated and integrated, and further arranged at the U-shaped part. And heat sealed to form a frame. Using a polyethylene / aluminum / polyethylene terephthalate laminated sheet as the upper and lower sheets, a 100 × 120 mm sheet was cut. The electrode laminate is placed in a container formed by thermocompression bonding the lower sheet and the frame portion, and the stainless steel sheet of the frame is in contact with the aluminum current collector surface and the metal copper current collector surface of the electrode laminate, respectively. In this case, an insulating tape was attached to a stainless sheet near the frame 10 mm in order to prevent a short circuit. Next, the top sheet was placed on the side frame, heated and pressed to seal, thereby producing a battery. As a result of conducting a charge / discharge test by connecting the ears of the stainless sheet to the electrode terminals of the charge / discharge machine, the initial discharge amount was 1.32 Ah, the average voltage was 3.6 V (4.76 Wh), and the charge / discharge was possible repeatedly. .

【００２１】[0021]

【実施例２】実施例１で作製した扁平型電池３個を、図
３に示すように正極面側と負極面側とが重なり合う構造
で積層し、正極面側と負極面側との間にＰＴＣシート
（直径１０ｍｍ、厚さ約１００μｍ）を配置させて組電
池を作製した。組電池の正極および負極を充放電機の電
極端子に接続して充放電（充電電圧１２．６Ｖ、０．５
Ａ定電流充電、０．５Ａ定電流放電、８Ｖカットオフ）
を行った結果、初回放電量１．３０Ａｈ、平均電圧１
０．７Ｖ（１３．９Ｗｈ）であり繰り返し充放電が可能
であった。さらにこの組電池を加熱して電極間の抵抗変
化を測定した結果、１１０℃で電極間抵抗が急激に増加
し、ＰＴＣ素子が作動していることがわかった。Example 2 Three flat batteries manufactured in Example 1 were laminated in a structure in which the positive electrode surface side and the negative electrode surface side overlap as shown in FIG. 3, and between the positive electrode surface side and the negative electrode surface side. A PTC sheet (diameter: 10 mm, thickness: about 100 μm) was arranged to produce an assembled battery. The positive and negative electrodes of the assembled battery are connected to the electrode terminals of the charger / discharger to charge / discharge (charge voltage 12.6 V, 0.5
A constant current charge, 0.5A constant current discharge, 8V cutoff)
As a result, the initial discharge amount was 1.30 Ah and the average voltage was 1.
It was 0.7 V (13.9 Wh), and charging and discharging were possible repeatedly. Furthermore, as a result of measuring the change in resistance between the electrodes by heating this assembled battery, it was found that the resistance between the electrodes rapidly increased at 110 ° C., and that the PTC element was operating.

【００２２】[0022]

【発明の効果】本発明の扁平型電池は、信頼性、安定
性、安全性に優れ、効率良く製造することのできる高性
能電池である。The flat battery according to the present invention is a high-performance battery excellent in reliability, stability and safety and can be manufactured efficiently.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明のパッケージ扁平型電池の一例である実
施例１の電池の上面を外した上面図である。FIG. 1 is a top view of a battery according to a first embodiment, which is an example of a flat battery according to the present invention, in which a top surface is removed.

【図２】本発明のパッケージ扁平型電池の一例である実
施例１の電池のＡＡ′面における断面図である。FIG. 2 is a cross-sectional view of the battery of Example 1, which is an example of a flat package battery of the present invention, taken along the AA ′ plane.

【図３】ＰＴＣ素子を接合した実施例２の組電池の断面
模式図である。FIG. 3 is a schematic cross-sectional view of an assembled battery according to a second embodiment in which PTC elements are joined.

【符号の説明】[Explanation of symbols]

１ パッケージ側面 ２ パッケージ上面 ３ パッケージ下面 ４ 電極積層体 ５ ＰＴＣシート ６、６′ 導電性端子 DESCRIPTION OF SYMBOLS 1 Package side surface 2 Package upper surface 3 Package lower surface 4 Electrode laminated body 5 PTC sheet 6, 6 'Conductive terminal

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 イオン輸送層を挟んで正極および負極が
接合してなる単位積層体構造を有するパッケージ電池に
おいて、該パッケージが上面、下面、および樹脂絶縁体
で形成される側面から構成され、該側面に、パッケージ
内外に貫通する、電池電極層と導電接合する導電性端子
が封入されていることを特徴とするパッケージ扁平型電
池。1. A package battery having a unit laminate structure in which a positive electrode and a negative electrode are joined with an ion transport layer interposed therebetween, wherein the package comprises an upper surface, a lower surface, and side surfaces formed of a resin insulator, A flat battery having a package in which a conductive terminal penetrating into and out of the package and electrically conductively bonding to a battery electrode layer is sealed on a side surface. 【請求項２】 請求項１のパッケージ扁平型電池の導電
性端子の少なくとも一部を電気抵抗が一定温度以上で急
激に上昇し導電性端子の導通を遮断することのできる金
属的伝導体粒子／絶縁性ポリマーの混合体で形成するこ
とを特徴とする電池。2. The metallic conductive particles capable of interrupting conduction of the conductive terminal by rapidly increasing the electrical resistance of at least a part of the conductive terminal of the flat package battery according to claim 1 at a certain temperature or higher. A battery formed of a mixture of insulating polymers. 【請求項３】 請求項１のパッケージ扁平型電池を２個
以上直列に積層してなる組電池の導電性端子の少なくと
も一部が電気抵抗が一定温度以上で急激に上昇し導電性
端子の導通を遮断することのできる金属的伝導体粒子／
絶縁性ポリマーの混合体で形成されていることを特徴と
する組電池。3. The conductive terminal of at least a part of the conductive terminal of the battery pack formed by stacking two or more flat-type batteries according to claim 1 in series at a certain temperature or higher and the conductive terminal conducts. Metallic conductor particles capable of blocking
An assembled battery comprising a mixture of insulating polymers.
JP8252711A 1996-09-25 1996-09-25 Packaged flat battery Withdrawn JPH10106531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8252711A JPH10106531A (en) 1996-09-25 1996-09-25 Packaged flat battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8252711A JPH10106531A (en) 1996-09-25 1996-09-25 Packaged flat battery

Publications (1)

Publication Number Publication Date
JPH10106531A true JPH10106531A (en) 1998-04-24

Family

ID=17241194

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8252711A Withdrawn JPH10106531A (en) 1996-09-25 1996-09-25 Packaged flat battery

Country Status (1)

Country Link
JP (1) JPH10106531A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11265704A (en) * 1998-03-17 1999-09-28 Asahi Chem Ind Co Ltd Nonaqueous battery and electrode terminal
JP2000251872A (en) * 1999-03-03 2000-09-14 Toshiba Battery Co Ltd Polymer lithium secondary battery
JP2003045410A (en) * 2001-08-02 2003-02-14 Mitsubishi Heavy Ind Ltd Secondary battery
JP2003092094A (en) * 2001-09-19 2003-03-28 Japan Storage Battery Co Ltd Cell device
JP2006196428A (en) * 2004-05-31 2006-07-27 Nissan Motor Co Ltd Battery pack and its manufacturing method
JP2007500920A (en) * 2003-07-31 2007-01-18 アヴェスター リミティッド パートナーシップ Polymer battery with temperature converter
JP2008103093A (en) * 2006-10-17 2008-05-01 Nissan Motor Co Ltd Manufacturing method of battery pack, and battery pack
WO2020189750A1 (en) * 2019-03-20 2020-09-24 Ａｐｂ株式会社 Lithium ion battery and method for assessing deterioration of lithium ion battery

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11265704A (en) * 1998-03-17 1999-09-28 Asahi Chem Ind Co Ltd Nonaqueous battery and electrode terminal
JP2000251872A (en) * 1999-03-03 2000-09-14 Toshiba Battery Co Ltd Polymer lithium secondary battery
JP2003045410A (en) * 2001-08-02 2003-02-14 Mitsubishi Heavy Ind Ltd Secondary battery
JP2003092094A (en) * 2001-09-19 2003-03-28 Japan Storage Battery Co Ltd Cell device
JP4842129B2 (en) * 2003-07-31 2011-12-21 バシウム・カナダ・インコーポレーテッド Polymer battery with temperature converter
JP2007500920A (en) * 2003-07-31 2007-01-18 アヴェスター リミティッド パートナーシップ Polymer battery with temperature converter
US9997760B2 (en) 2004-05-31 2018-06-12 Nissan Motor Co., Ltd. Assembled battery and manufacturing method thereof
US9246145B2 (en) 2004-05-31 2016-01-26 Nissan Motor Co., Ltd. Assembled battery and manufacturing method thereof
JP2006196428A (en) * 2004-05-31 2006-07-27 Nissan Motor Co Ltd Battery pack and its manufacturing method
JP2008103093A (en) * 2006-10-17 2008-05-01 Nissan Motor Co Ltd Manufacturing method of battery pack, and battery pack
WO2020189750A1 (en) * 2019-03-20 2020-09-24 Ａｐｂ株式会社 Lithium ion battery and method for assessing deterioration of lithium ion battery
JP2021044230A (en) * 2019-03-20 2021-03-18 三洋化成工業株式会社 Lithium ion battery, and method for making judgement about the degradation of lithium ion battery
US12003000B2 (en) 2019-03-20 2024-06-04 Apb Corporation Lithium ion battery and method for assessing deterioration of lithium ion battery

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