JP2001110445A - Cord type battery - Google Patents

Cord type battery

Info

Publication number
JP2001110445A
JP2001110445A JP28978099A JP28978099A JP2001110445A JP 2001110445 A JP2001110445 A JP 2001110445A JP 28978099 A JP28978099 A JP 28978099A JP 28978099 A JP28978099 A JP 28978099A JP 2001110445 A JP2001110445 A JP 2001110445A
Authority
JP
Japan
Prior art keywords
cord
negative electrode
type battery
electrode material
positive electrode
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Withdrawn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
JP28978099A
Other languages
Japanese (ja)
Inventor
Takao Yuyama
恭男 湯山
Takayuki Kobayashi
隆幸 小林
Rumi Nakano
留美 中野
Kazuhiro Noda
和宏 野田
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP28978099A priority Critical patent/JP2001110445A/en
Publication of JP2001110445A publication Critical patent/JP2001110445A/en
Withdrawn legal-status Critical Current

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

PROBLEM TO BE SOLVED: To realize a large capacity power source, with keeping a compact and lightweight body for electronic apparatus and the like by adding function as a battery to a cord, where the cord is used for electronic apparatus and the like. SOLUTION: Either a long material of a negative electrode 2 or a long material of a positive electrode 4, which are made by forming substances 10 and 12 for activating the electrodes respectively at circumferencial areas of electrodes 9 and 11, is used as a core material, while the other electrode provided co axially around the core material via a high molecular solid electrolyte 3, thereafter, the entire materials are coated with an armor material 5, so as to organize a flexible cord shape.

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、携帯型電子機器等
に用いて好適なコード型バッテリに関する。The present invention relates to a cord-type battery suitable for use in portable electronic equipment and the like.

【０００２】[0002]

【従来の技術】各種の電子機器等においては、一般に本
体機器に対して各種の付属機器がケーブルを介して接続
され、両者の間で信号等の送受信が行われる。かかる電
子機器等においては、各付属機器の小型、軽量化、構造
の簡易化等を図るために、これら付属機器に対して本体
機器から電源を供給するように構成したものが多い。ま
た、電子機器等においては、商用電源とともに、携帯時
等の使用可能とし、またバックアップや予備電源として
電池が搭載されている。搭載される電池は、一般に繰り
返し充電が可能な二次電池が用いられる。電池には、容
量や出力電圧等の仕様とともに、様々な形状と大きさの
ものが提供されている。電池の形状としては、円筒型、
角筒型、ボタン型或いは板状型等が一般的である。さら
に、二次電池としては、従来鉛電池やニッケル・カドミ
ウム蓄電池等が用いられていた。2. Description of the Related Art In various electronic devices, various attached devices are generally connected to a main device via a cable, and signals and the like are transmitted and received between the two devices. Many of such electronic devices and the like are configured to supply power from the main device to the accessory devices in order to reduce the size, weight, and simplification of the structure of the accessory devices. In addition, electronic equipment and the like have a commercial power supply and can be used at the time of carrying, etc., and a battery is mounted as a backup or a standby power supply. Generally, a secondary battery that can be repeatedly charged is used. Batteries are provided in various shapes and sizes, along with specifications such as capacity and output voltage. The shape of the battery is cylindrical,
A rectangular tube type, a button type, a plate type or the like is generally used. Further, as a secondary battery, a lead battery, a nickel-cadmium storage battery, or the like has been conventionally used.

【０００３】ところで、電子機器等においては、薄型軽
量化とともに、多機能化或いは長時間使用化が図られて
おり、このために高出力、高容量で小型、軽量かつ薄型
で安全性の高い二次電池が求められている。上述した従
来の二次電池は、かかる要求仕様に対応することが困難
であった。このため、電子機器等においては、小型、軽
量、クリーンで高エネルギー密度を有するとともに、サ
イクル特性、安全性に優れかつ低温特性や負荷特性、或
いは急速充電特性に優れる等の種々の特徴を有するリチ
ウムイオン二次電池が用いられるようになっている。By the way, electronic devices and the like have been reduced in thickness and weight, and have been designed to be multifunctional or have been used for a long period of time. The next battery is required. It is difficult for the above-mentioned conventional secondary battery to meet such required specifications. For this reason, in electronic devices and the like, lithium, which is small, lightweight, clean and has a high energy density, and has various characteristics such as excellent cycle characteristics, safety, and excellent low-temperature characteristics, load characteristics, or rapid charging characteristics. An ion secondary battery has been used.

【０００４】リチウムイオン二次電池は、リチウムをド
ープ／脱ドープ可能とする炭素系材料からなる負極活物
質によって負極を構成するとともに、リチウムコバルト
酸化物やリチウムニッケル酸化物等のリチウムを含む遷
移金属酸化物からなる正極活物質によって正極を構成す
る。リチウムイオン二次電池は、これら負極と正極とを
セパレータを介して重ね合わせて発電体を構成し、この
発電体を電池缶に装填するとともに電解液を充填して電
池蓋によって封入してなる。In a lithium ion secondary battery, a negative electrode is formed of a negative electrode active material made of a carbon-based material capable of doping / dedoping lithium, and a transition metal containing lithium such as lithium cobalt oxide or lithium nickel oxide is used. A positive electrode is composed of a positive electrode active material composed of an oxide. In a lithium ion secondary battery, a negative electrode and a positive electrode are overlapped with a separator interposed therebetween to form a power generator. The power generator is loaded into a battery can, filled with an electrolyte, and sealed with a battery lid.

【０００５】[0005]

【発明が解決しようとする課題】電子機器等において
は、筐体容量に占める電池の収納スペースの割合が極め
て大きく、電池の薄型化によって大幅な小型軽量化が図
られている。一方、電子機器においては、搭載した電池
の容量も極めて重要であり、充分な容量を保持するため
には多数個の電池が搭載されるために大きな収納スペー
スが必要となる。特に、携帯型電子機器等においては、
携帯時にも搭載した二次電池を電源として長時間に亘っ
て使用されるが、使用途中で二次電池の容量不足といっ
た事態がしばしば発生することがあった。使用者は、こ
のために予備の電池パックを購入してこれを持ち歩くこ
とになるが、わざわざ購入しなければならない面倒があ
るとともに、重くかつ嵩張るためについつい持参するこ
とを忘れてしまうことが多いといった問題があった。In electronic equipment and the like, the ratio of the storage space of the battery to the housing capacity is extremely large, and the size and weight of the battery are significantly reduced by reducing the thickness of the battery. On the other hand, in an electronic device, the capacity of a mounted battery is also extremely important, and a large storage space is required because a large number of batteries are mounted to maintain a sufficient capacity. In particular, in portable electronic devices and the like,
Although the battery is used for a long time using the mounted secondary battery as a power source even when the mobile phone is used, a situation such as a shortage of the capacity of the secondary battery sometimes occurs during use. For this reason, the user purchases a spare battery pack and carries it around, but it is troublesome to purchase it and often forgets to bring it because it is heavy and bulky. There was such a problem.

【０００６】また、電子機器等においては、夜間時等に
おいて充電器を介して二次電池の充電が行われるが、こ
の操作がしばしば忘れられることが多い。特に、携帯型
電子機器等においては、二次電池の充電中には当然これ
を携帯して使用することができないことから、二次電池
の充電忘れや充電不足がたびたび発生していた。[0006] In an electronic device or the like, a secondary battery is charged via a charger at night or the like, but this operation is often forgotten. Particularly, in a portable electronic device or the like, since the secondary battery cannot be carried and used during the charging of the secondary battery, the secondary battery is often forgotten or insufficiently charged.

【０００７】一方、日頃携帯されて使用される携帯型電
子機器等は、パーソナルコンピュータ等の情報処理装
置、カムコーダやテープやディスクの再生専用等のＡＶ
機器、或いは携帯電話機等といったように様々である。
したがって、使用者にとっては、上述した問題に対応す
るために携帯するこれら携帯型電子機器等についてそれ
ぞれの専用の予備電源パックを持ち歩くとともに充電操
作も行わなければならないが、到底その実行が不可能で
あって二次電池の容量不足を頻発させていた。On the other hand, portable electronic devices and the like which are usually carried and used include information processing devices such as personal computers, and AV devices such as camcorders, tapes and discs for reproduction only.
There are various types such as devices and mobile phones.
Therefore, the user must carry a dedicated backup power supply pack and carry out a charging operation for each of these portable electronic devices and the like to cope with the above-described problems, but it is impossible to perform the operation at all. As a result, the capacity shortage of the secondary battery frequently occurred.

【０００８】したがって、本発明は、電子機器等に用い
られるコードに着目し、このコードに電池機能を付加す
ることで、電子機器等の全体の小型軽量化を保持しなが
ら搭載電源の大容量化を実現するコード型バッテリを提
供することを目的に提案されたものである。Accordingly, the present invention focuses on a cord used in electronic equipment and the like, and by adding a battery function to this cord, it is possible to increase the capacity of a mounted power supply while maintaining the overall size and weight of the electronic equipment and the like. Has been proposed for the purpose of providing a corded battery realizing the above.

【０００９】[0009]

【課題を解決するための手段】上述した目的を達成する
本発明にかかるコード型バッテリは、それぞれ電極の外
周部に電極活物質を形成してなる長尺の負極材又は正極
材のいずれか一方の電極材を芯材とし、その外周部に高
分子固体電解質を介して他方の電極材を同軸に設け、こ
れらを外装材によって封装することにより全体が可撓性
を有する長軸のコード状に構成されてなる。A cord-type battery according to the present invention, which achieves the above-mentioned object, comprises a long negative electrode material and a long positive electrode material each having an electrode active material formed on the outer periphery of an electrode. The electrode material is a core material, and the other electrode material is coaxially provided on the outer periphery of the core material with a polymer solid electrolyte interposed therebetween. It is composed.

【００１０】以上のように構成された本発明にかかるコ
ード型バッテリによれば、電子機器等に備えられるコー
ド自体を電池として構成することで電池の収納スペース
を小型化或いは不要とすることが可能となるためにその
小型軽量化が図られるようになる。また、コード型バッ
テリは、より大きな長さとすることによって電子機器等
を大型化すること無く電池の容量を増やすことが可能と
なることから、これを長時間に亘って使用した場合でも
電池の容量が不足するといった事態の発生を低減する。According to the cord-type battery according to the present invention having the above-described configuration, the cord itself provided in the electronic device or the like is configured as a battery, so that the storage space for the battery can be reduced in size or made unnecessary. Therefore, the size and weight can be reduced. In addition, since the cord-type battery can have a larger length and increase the capacity of the battery without increasing the size of the electronic device or the like, the battery capacity can be increased even when the battery is used for a long time. The occurrence of a situation such as a shortage is reduced.

【００１１】[0011]

【発明の実施の形態】以下、本発明の実施の形態につい
て、図面を参照して詳細に説明する。実施の形態として
図１乃至図３に示したコード型バッテリ１は、全体の形
態が可撓性を有する長軸なコード状を呈して構成され、
電源コードや他のケーブル類と同様に図示しない電子機
器に接続されて用いられることによって電源を供給する
電池電源を構成する。また、コード型バッテリ１は、詳
細を後述するようにリチウムイオン二次電池からなり、
例えば電子機器に内蔵された電源電池の予備電源やバッ
クアップ電源としても作用する。さらに、コード型バッ
テリ１は、携帯型電子機器に接続されて、携帯時にその
内蔵二次電池を充電する充電用電源としても作用する。Embodiments of the present invention will be described below in detail with reference to the drawings. The cord-type battery 1 shown in FIGS. 1 to 3 as an embodiment is configured so that the whole form exhibits a long-axis cord shape having flexibility,
Like a power cord and other cables, it is connected to an electronic device (not shown) and used to constitute a battery power supply for supplying power. The cord-type battery 1 is made of a lithium ion secondary battery as described in detail below,
For example, it also functions as a backup power supply or a backup power supply for a power supply battery built in an electronic device. Further, the cord-type battery 1 is connected to a portable electronic device, and also functions as a charging power source for charging the built-in secondary battery when the portable battery is carried.

【００１２】コード型バッテリ１は、図１乃至図３に示
すように、負極材２を芯材としてその外周部に高分子固
体電解質３を介して正極材４が同軸に形成され、全体を
絶縁チューブ５によって封装した断面が略円形を以って
構成されてなる。コード型バッテリ１には、両端部に封
止剤６を介して、負極端子７と正極端子８とが突出して
形成されている。負極材２は、比較的細径とされること
によって全長に亘って可撓性を有する銅線からなる負極
集電体９と、この負極集電体９の外周部に均一な厚みで
負極活物質合剤を塗布して形成された負極活物質１０と
からなる。負極集電体９は、図２及び図３に示すよう
に、先端部９ａが封止剤６によって封装状態を保持され
て外方へと突き出されて負極端子７を構成する。As shown in FIGS. 1 to 3, the cord type battery 1 has a negative electrode material 2 as a core material, and a positive electrode material 4 formed coaxially on an outer peripheral portion thereof with a polymer solid electrolyte 3 interposed therebetween. The cross section sealed by the tube 5 has a substantially circular shape. The cord type battery 1 is formed with a negative electrode terminal 7 and a positive electrode terminal 8 protruding at both ends with a sealant 6 interposed therebetween. The negative electrode material 2 is made of a copper wire having a relatively small diameter and having flexibility over its entire length, and a negative electrode active material having a uniform thickness on the outer periphery of the negative electrode current collector 9. And a negative electrode active material 10 formed by applying a material mixture. As shown in FIGS. 2 and 3, the tip portion 9 a of the negative electrode current collector 9 is kept outwardly sealed by the sealant 6 and protrudes outward to form the negative electrode terminal 7.

【００１３】負極集電体９は、銅線に代えて金属リチウ
ム線によって構成してもよい。負極集電体９は、この場
合、両端部が封止剤６によって封止されるとともに、例
えば銅線等からなる負極端子が接続されこの負極端子を
封止剤６から引き出すようにする。The negative electrode current collector 9 may be constituted by a metal lithium wire instead of a copper wire. In this case, both ends of the negative electrode current collector 9 are sealed with the sealant 6, and a negative electrode terminal made of, for example, a copper wire is connected to the negative electrode terminal 9 so as to be drawn out of the sealant 6.

【００１４】負極活物質合剤は、負極物質としてリチウ
ムイオンをドープ・脱ドープ可能な材料、例えばグラフ
ァイトや難黒鉛化炭素或いは易黒鉛化炭素等の炭素材料
が用いられる。負極活物質合剤は、これら炭素材料に対
して、バインダとしてＰＹｄＦ（ポリフッ化ビニリデ
ン）、溶剤としてＮＭＰ（ｎ−メチルピロリドン）を加
えてスラリー状されてなる。なお、負極物質には、炭素
材料の他にも、ポリアセチレン、ポリピロール等の高分
子材料やＳｎＯ2等の酸化物も使用される。As the negative electrode active material mixture, a material capable of doping and undoping lithium ions as a negative electrode material, for example, a carbon material such as graphite, non-graphitizable carbon or graphitizable carbon is used. The negative electrode active material mixture is a slurry obtained by adding PYdF (polyvinylidene fluoride) as a binder and NMP (n-methylpyrrolidone) as a solvent to these carbon materials. In addition to the carbon material, a polymer material such as polyacetylene and polypyrrole and an oxide such as SnO 2 are used for the negative electrode material.

【００１５】負極活物質合剤は、例えばディップ法によ
って負極集電体９の外周部に均一に塗布される。すなわ
ち、負極活物質合剤は、スラリー状化されて所定の塗布
容器内に充填され、この塗布容器内に負極集電体９を連
続的に導いて所定時間浸すことによってその外周部に均
一な厚みで塗布されて負極活物質１０を形成する。The negative electrode active material mixture is uniformly applied to the outer periphery of the negative electrode current collector 9 by, for example, a dipping method. That is, the negative electrode active material mixture is made into a slurry and filled in a predetermined application container, and the negative electrode current collector 9 is continuously guided into the application container and immersed for a predetermined time to form a uniform material on the outer periphery thereof. The negative electrode active material 10 is formed by being applied in a thickness.

【００１６】負極材２は、上述した工程により負極集電
体９の外周部に負極活物質合剤を塗布した後に塗布容器
から遠赤外線炉へと送られ、この遠赤外線炉内において
高温乾燥処理が施されてＮＭＰが飛ばされて負極活物質
１０を成膜形成する。負極材２は、さらにロールプレス
等を通過させて加圧処理が施されることによって、負極
集電体９に対して負極活物質１０の高密度化を図るよう
にする。The negative electrode material 2 is applied to the outer periphery of the negative electrode current collector 9 by the above-described process, and then sent from the application container to a far-infrared furnace, where it is subjected to a high-temperature drying treatment. The NMP is blown off to form a film of the negative electrode active material 10. The negative electrode material 2 is further subjected to a pressure treatment by passing it through a roll press or the like, thereby increasing the density of the negative electrode active material 10 with respect to the negative electrode current collector 9.

【００１７】高分子固体電解質３は、高分子材料と、電
解液と、電解質塩とを混合してゲル状化した電解質が用
いられる。高分子材料は、電解液に相溶する性質を有
し、シリコンゲル、アクリルゲル、アクリロニトリルゲ
ル、ポリフォスファゼン変性ポリマー、ポリエチレンオ
キサイド、ポリプロピレンオキサイド、及びこれらの複
合ポリマーや架橋ポリマー、変性ポリマー等、若しくは
フッ素系ポリマーとして、例えばポリ（ビニリデンフル
オロライド）、ポリ（ビニリデンフルオロライド-c o-テ
トラフルオロサフルオロプロピレン）、ポリ（ビニリデ
ンフルオロライド-c o-トリフルオロエチレン）等の高分
子材料、及びこれらの混合物が各種使用される。As the polymer solid electrolyte 3, a gelled electrolyte obtained by mixing a polymer material, an electrolytic solution, and an electrolyte salt is used. The polymer material has a property of being compatible with the electrolytic solution, and includes a silicone gel, an acrylic gel, an acrylonitrile gel, a polyphosphazene-modified polymer, a polyethylene oxide, a polypropylene oxide, and a composite polymer, a cross-linked polymer, and a modified polymer thereof. or fluorine-based polymers, such as poly (vinylidene fluoride), poly (vinylidene fluoride -c o-tetrafluoro fluoro-propylene), poly (vinylidene fluoride -c o-trifluoroethylene) polymer material such and, Various mixtures of these are used.

【００１８】電解液成分は、上述した高分子材料を分散
可能とし、非プロトン性溶媒として例えばエチレンカー
ボネート（ＥＣ）やプロピレンカーボネート（ＰＣ）或
いはブチレンカーボネート（ＢＣ）等が用いられる。電
解質塩には、溶剤に相溶するものが用いられ、カチオン
とアニオンとが組み合わされてなる。カチオンには、ア
ルカリ金属やアルカリ土類金属が用いられる。アニオン
には、Ｃｌ-、Ｂｒ-、Ｉ-、ＳＣＮ-、ＣｌＯ4 -、Ｂ
Ｆ4 -、ＰＦ6 -、ＣＦ3ＳＯ3 -等が用いられる。電解質塩
には、具体的には六フッ化リン酸リチウムや四フッ化ホ
ウ酸リチウムが、電解液に対して溶解可能な濃度で用い
られる。The above-mentioned polymer material can be dispersed in the electrolytic solution component, and as the aprotic solvent, for example, ethylene carbonate (EC), propylene carbonate (PC), or butylene carbonate (BC) is used. As the electrolyte salt, one that is compatible with the solvent is used, and a combination of a cation and an anion is used. As the cation, an alkali metal or an alkaline earth metal is used. Anions include Cl − , Br − , I − , SCN − , ClO 4 − , B
F 4 − , PF 6 − , CF 3 SO 3 − and the like are used. As the electrolyte salt, specifically, lithium hexafluorophosphate or lithium tetrafluoroborate is used at a concentration that can be dissolved in the electrolytic solution.

【００１９】高分子固体電荷質３は、上述した負極材２
の外周部に、例えばディップ法によって均一な厚みで塗
布形成される。すなわち、高分子固体電荷質３は、ゲル
状化された状態で所定の塗布容器内に充填され、この容
器内に上述した工程を経て製作された負極材２を連続的
に導いて所定時間浸すことによって、その負極活物質１
０の外周部に均一な厚みで塗膜形成されて電池中間体を
形成する。勿論、高分子固体電荷質３は、負極材２の外
周部に一般的な塗布方法によって形成するようにしても
よい。The solid polymer charge 3 is composed of the negative electrode material 2 described above.
Is formed with a uniform thickness by, for example, a dip method. That is, the polymer solid charge 3 is filled into a predetermined application container in a gelled state, and the negative electrode material 2 manufactured through the above-described process is continuously guided into the container and dipped for a predetermined time. By doing so, the negative electrode active material 1
0 to form a coating film with a uniform thickness on the outer peripheral portion to form a battery intermediate. Of course, the polymer solid charge 3 may be formed on the outer peripheral portion of the negative electrode material 2 by a general coating method.

【００２０】正極材４は、アルミニウムからなる正極集
電体１１と、この正極集電体１１の内周部に正極活物質
合剤を均一な厚みで塗布して形成した正極活物質１６と
からなる。正極集電体１１は、詳細を後述するように高
分子固体電荷質３の外周部に正極活物質１６を形成した
後に、アルミニウムを吹き付けてアルミニウム層を形成
するメタルスプレー法によって形成される。正極集電体
１１には、詳細を後述するようにその先端部１１ａに正
極端子８が接合される。The positive electrode material 4 is composed of a positive electrode current collector 11 made of aluminum and a positive electrode active material 16 formed by applying a positive electrode active material mixture to the inner periphery of the positive electrode current collector 11 with a uniform thickness. Become. The positive electrode current collector 11 is formed by a metal spray method in which after forming the positive electrode active material 16 on the outer periphery of the solid polymer electrolyte 3 as described later in detail, aluminum is sprayed to form an aluminum layer. The positive electrode terminal 8 is joined to the front end 11a of the positive electrode current collector 11 as described in detail later.

【００２１】正極活物質合剤は、例えばＴｉＳ2、Ｍｏ
Ｓ2、ＮｂＳｅ2、Ｖ2Ｏ5等のリチウムを含有しない金属
硫化物或いは酸化物、ＬｉxＭＯ2（式中、Ｍは一種以上
の遷移金属を表す。ｘは電池の充放電状態によって異な
り、通常０．０５以上１．１０以下である。）を主体と
するリチウム複合酸化物等の正極物質が用いられる。遷
移金属Ｍには、例えばＣｏ（コバルト）、Ｎｉ（ニッケ
ル）、Ｍｎ（マンガン）が用いられ、具体的にはＬｉＣ
ｏＯ2、ＬｉＮｉＯ2、ＬｉＮｉyＣｏ1-yＯ2（０＜ｙ＜
１）、ＬｉＭｎ2Ｏ4が用いられる。これらリチウム複合
酸化物は、高電圧を発生することができるとともにエネ
ルギー密度的に優れた物質である。なお、正極活物質合
剤には、これらの物質を複数種混合して用いてもよい。
正極活物質合剤は、上述した正極物質に対して、例えば
バインダとしてＰＹｄＦ、溶剤としてＮＭＰを加えてス
ラリー状化されてなる。The positive electrode active material mixture is, for example, TiS 2 , Mo
Lithium-free metal sulfide or oxide such as S 2 , NbSe 2 , V 2 O 5 , or Li x MO 2 (where M represents one or more transition metals. X varies depending on the charge / discharge state of the battery. , And usually 0.05 or more and 1.10 or less). For the transition metal M, for example, Co (cobalt), Ni (nickel), or Mn (manganese) is used.
oO 2 , LiNiO 2 , LiNi y Co 1-y O 2 (0 <y <
1) LiMn 2 O 4 is used. These lithium composite oxides are substances that can generate a high voltage and are excellent in energy density. In the positive electrode active material mixture, a plurality of these substances may be mixed and used.
The positive electrode active material mixture is formed into a slurry by adding, for example, PYdF as a binder and NMP as a solvent to the above-described positive electrode material.

【００２２】正極材４は、上述した負極材２を芯材とし
てその外周部に高分子固体電荷質３を成膜形成した電池
中間体に対して、例えばディップ法により正極活物質１
２が成膜形成され、さらに正極集電体１１が形成され
る。すなわち、電池中間体は、上述したようにゲル状化
した正極活物質合剤を充填した所定の塗布容器内に連続
的に導かれて所定時間浸されることによって、その外周
部に均一な厚みで正極活物質合剤が塗布される。電池中
間体は、塗布容器から遠赤外線炉へと送られ、この遠赤
外線炉内において高温乾燥処理が施されてＮＭＰが飛ば
されて高分子固体電荷質３の外周部に正極活物質１２を
成膜形成する。なお、電池中間体は、ロールプレス等を
通過させて加圧処理を施すことによって、高分子固体電
荷質３に対して正極活物質１２の高密度化を図るように
する。The positive electrode material 4 is applied to a battery intermediate in which the above-mentioned negative electrode material 2 is used as a core material and a polymer solid charge 3 is formed on the outer periphery thereof by, for example, a dip method.
2 is formed and a positive electrode current collector 11 is further formed. That is, the battery intermediate is continuously guided and immersed in a predetermined application container filled with the gelled positive electrode active material mixture as described above, and is immersed for a predetermined time, so that a uniform thickness is formed on the outer peripheral portion thereof. The positive electrode active material mixture is applied. The battery intermediate is sent from the coating container to a far-infrared furnace, where it is subjected to a high-temperature drying treatment and NMP is blown off to form a positive electrode active material 12 on the outer periphery of the polymer solid charge 3. Form a film. The battery intermediate is subjected to a pressure treatment by passing it through a roll press or the like so as to increase the density of the positive electrode active material 12 with respect to the polymer solid charge 3.

【００２３】電池中間体には、上述した正極活物質１２
の外周部に正極集電体１１が形成される。なお、正極材
４は、例えばアルミ箔が用いられ、このアルミ箔の主面
に正極活物質１２を成膜形成したものを上述した電池中
間体の外周部に巻き付けて構成するようにしてもよい。
正極集電体１１には、上述したようにその両端部に正極
端子７がそれぞれ接合される。正極端子７は、例えば正
極集電体１１の外径とほぼ等しい内径を有する環状のア
ルミニウム材からなり、図２及び図３に示すようにその
自由端側が封止剤６によって封装状態を保持されて外方
へと突出する。正極端子７は、負極端子７と同心円をな
し、その外周を取り囲んで延在する。In the battery intermediate, the positive electrode active material 12 described above is used.
A positive electrode current collector 11 is formed on the outer periphery of the positive electrode current collector 11. The positive electrode material 4 is made of, for example, an aluminum foil, and may be formed by winding a film of the positive electrode active material 12 formed on the main surface of the aluminum foil around the outer periphery of the above-described battery intermediate. .
As described above, the positive electrode terminals 7 are joined to both ends of the positive electrode current collector 11, respectively. The positive electrode terminal 7 is made of, for example, an annular aluminum material having an inner diameter substantially equal to the outer diameter of the positive electrode current collector 11, and the free end side of the positive electrode terminal 7 is sealed by the sealant 6 as shown in FIGS. 2 and 3. Protruding outward. The positive electrode terminal 7 forms a concentric circle with the negative electrode terminal 7 and extends around the outer periphery thereof.

【００２４】電池中間体には、上述した負極材形成工程
と、高分子固体電解質形成工程及び正極材形成工程とを
経て、正極集電体１１の外周部に絶縁チューブ５が被覆
されるとともに、両端部に封止剤６が充填されてコード
型バッテリ１を形成する。絶縁チューブ５には、例えば
加熱処理を施すことによって全体が縮径する熱収縮性の
合成樹脂チューブが用いられる。したがって、コード型
バッテリ１は、絶縁チューブ５及び封止剤６によって上
述した負極材２、高分子固体電解質３及び正極材４から
なる発電体が確実に封装されて、全体が長軸でかつ可撓
性を有して構成される。Through the above-described negative electrode material forming step, polymer solid electrolyte forming step and positive electrode material forming step, the outer peripheral portion of the positive electrode current collector 11 is coated with an insulating tube 5 on the battery intermediate. Both ends are filled with the sealant 6 to form the cord-type battery 1. As the insulating tube 5, for example, a heat-shrinkable synthetic resin tube whose entire diameter is reduced by performing a heat treatment is used. Accordingly, in the cord-type battery 1, the power generator including the negative electrode material 2, the solid polymer electrolyte 3, and the positive electrode material 4 described above is securely sealed by the insulating tube 5 and the sealant 6, so that the entirety of the cord battery 1 has a long axis. It is configured to have flexibility.

【００２５】以上のように構成されたコード型バッテリ
１は、負極端子７と正極端子８とが電子機器に設けられ
た同軸型の電源コネクタ部に差し込まれて接続される。
電源コネクタ部は、図示しないが負極端子７が差し込ま
れる小径の筒状負極端子と、正極端子８が差し込まれる
大径の筒状正極端子とを備えてなる。コード型バッテリ
１は、電子機器に内蔵された電源電池の予備電源やバッ
クアップ電源として作用する。また、コード型バッテリ
１は、付属機器の電源を構成する。さらに、コード型バ
ッテリ１は、携帯型電子機器に接続されて、携帯時にそ
の内蔵二次電池を充電する充電用電源としても作用す
る。In the cord-type battery 1 configured as described above, the negative electrode terminal 7 and the positive electrode terminal 8 are connected by being inserted into a coaxial power supply connector provided in an electronic device.
Although not shown, the power supply connector section includes a small-diameter cylindrical negative electrode terminal into which the negative electrode terminal 7 is inserted, and a large-diameter cylindrical positive electrode terminal into which the positive electrode terminal 8 is inserted. The cord-type battery 1 functions as a backup power supply or a backup power supply for a power supply battery built in the electronic device. In addition, the cord-type battery 1 constitutes a power supply for an accessory device. Further, the cord-type battery 1 is connected to a portable electronic device, and also functions as a charging power source for charging the built-in secondary battery when the portable battery is carried.

【００２６】コード型バッテリ１は、充分な長さを有す
ることから、従来の電池と比較して大きな容量の電池を
構成することが可能である。コード型バッテリ１は、機
器本体と付属機器等の間を接続する各種のケーブルと同
様の形態を呈する形態から、邪魔にならずかつ違和感を
生じさせることは無い。コード型バッテリ１は、機器内
部に電池の収納スペースを不要とし或いは小さなスペー
スで大容量の電池電源を構成することを可能とすること
から、電子機器の小型軽量化を図る。コード型バッテリ
１は、大容量の電池電源を構成することで、携帯型電子
機器を長時間に亘って使用した場合においても容量不足
等の発生を抑制する。Since the cord type battery 1 has a sufficient length, it is possible to constitute a battery having a larger capacity than a conventional battery. Since the cord-type battery 1 has a form similar to various kinds of cables for connecting between the main body of the apparatus and the auxiliary equipment, it does not become an obstacle and does not cause a feeling of strangeness. The cord-type battery 1 eliminates the need for a battery storage space inside the device or makes it possible to configure a large-capacity battery power supply in a small space, thereby reducing the size and weight of the electronic device. The cord-type battery 1 constitutes a large-capacity battery power supply, thereby suppressing shortage of capacity or the like even when the portable electronic device is used for a long time.

【００２７】上述したコード型バッテリ１においては、
負極材２を芯材として、その外周部に高分子固体電解質
３を介して正極材４を形成したが、かかる構成に限定さ
れるものでは無い。コード型バッテリ１は、例えば正極
材４を芯材としてその外周部に高分子固体電解質３を介
して負極材２を形成するようにしてもよい。コード型バ
ッテリ１は、この場合正極材４の正極集電体１１に例え
ばアルミニウム線が用いられ、高分子固体電解質３の外
周部に負極活物質１０を形成した後に銅をメタルスプレ
ーして負極集電体９が形成される。In the cord type battery 1 described above,
Although the negative electrode material 2 is used as a core material and the positive electrode material 4 is formed on the outer periphery thereof with the polymer solid electrolyte 3 interposed therebetween, the present invention is not limited to this configuration. The cord type battery 1 may be configured such that, for example, the positive electrode material 4 is used as a core material, and the negative electrode material 2 is formed on the outer peripheral portion thereof via the solid polymer electrolyte 3. In this case, for example, an aluminum wire is used for the positive electrode current collector 11 of the positive electrode material 4, the negative electrode active material 10 is formed on the outer periphery of the solid polymer electrolyte 3, and then the metal is sprayed with copper to form the negative electrode current collector 1. An electric body 9 is formed.

【００２８】また、コード型バッテリ１においては、ゲ
ル状化した高分子固体電解質３を負極材２の外周部に塗
布形成するようにしたが、例えばポリマーに高分子電解
質を染み込ませた高分子ポリマー電解質を負極材２と正
極材４との間に介挿して構成してもよい。コード型バッ
テリ１は、断面を略円形に構成したが、負極材２と、高
分子固体電解質３と、正極材４とが互いに同軸に形成さ
れていればよく、例えば断面が楕円形であってもよい。In the cord-type battery 1, the gelled polymer solid electrolyte 3 is formed by coating on the outer periphery of the negative electrode material 2. For example, a polymer polymer electrolyte impregnated with a polymer is used. The electrolyte may be inserted between the negative electrode material 2 and the positive electrode material 4. The cord type battery 1 has a substantially circular cross section. However, the negative electrode material 2, the solid polymer electrolyte 3, and the positive electrode material 4 may be formed coaxially with each other. Is also good.

【００２９】さらに、コード型バッテリ１は、繰り返し
充電が可能なリチウムイオン二次電池によって構成され
たが、電子機器に対して着脱自在とされることから一次
電池であってもよい。コード型バッテリ１は、この場合
負極材２の電極に上述したように金属リチウム線が用い
られ、また各電極活物質や高分子固体電解質も適宜の組
成のものが用いられる。Further, although the cord type battery 1 is constituted by a rechargeable lithium ion secondary battery, it may be a primary battery because it is detachable from electronic equipment. In this case, the cord-type battery 1 uses a metal lithium wire for the electrode of the negative electrode material 2 as described above, and also uses an appropriate composition for each electrode active material and solid polymer electrolyte.

【００３０】さらにまた、コード型バッテリ１は、銅線
を用いた負極材２の負極集電体９の先端９ａを封止剤６
から突出させて負極端子７とするとともにその周囲を囲
む環状の正極端子８によって端子部を構成したが、かか
る端子構造に限定されるものでは無い。端子構造は、例
えば負極集電体９や正極集電体１１に接続された板状の
端子によって構成してもよい。Further, in the cord type battery 1, the tip 9a of the negative electrode current collector 9 of the negative electrode material 2 using a copper wire is
The terminal portion is constituted by an annular positive terminal 8 surrounding the periphery of the negative electrode terminal 7 by protruding from the terminal portion, but is not limited to such a terminal structure. The terminal structure may be configured by, for example, plate-shaped terminals connected to the negative electrode current collector 9 and the positive electrode current collector 11.

【００３１】本発明の第２の実施の形態として図４に示
したコード型バッテリユニット２０は、上述したコード
型バッテリ１と信号ケーブル２１とを一体化して構成し
てなる。すなわち、コード型バッテリユニット２０は、
同図に示すようにコード型バッテリ１と信号ケーブル２
１とを全長に亘って互いに平行な状態に保持するととも
に、これらを絶縁樹脂２２によって封装することにより
平行フィーダ型に構成してなる。信号ケーブル２１は、
詳細を省略するが例えば絶縁被覆コード内に互いに絶縁
を保持された状態で少なくとも一対の信号線が封装され
てなる。勿論、信号ケーブル２１は、多数本の信号線を
有する多芯線や、同軸ケーブルであってもよい。A cord type battery unit 20 shown in FIG. 4 as a second embodiment of the present invention is constructed by integrating the above-mentioned cord type battery 1 and a signal cable 21. That is, the cord type battery unit 20
As shown in the figure, a cord type battery 1 and a signal cable 2
1 are held parallel to each other over the entire length, and are sealed with an insulating resin 22 to form a parallel feeder type. The signal cable 21
Although details are omitted, for example, at least a pair of signal lines are sealed in a state in which the insulation is held in an insulating coating cord. Of course, the signal cable 21 may be a multi-core wire having many signal lines or a coaxial cable.

【００３２】コード型バッテリユニット２０には、例え
ば携帯型ディスク再生装置に用いられて、その機器本体
とコントローラとの間を接続する。コード型バッテリユ
ニット２０は、信号ケーブル２１によって機器本体から
コントローラを介して楽音信号をイヤホンへと送信して
その再生が行われるようにするとともに、機器本体とコ
ントローラとの間で制御信号を送受信して所定の制御動
作が行われるようにする。コード型バッテリユニット２
０は、コード型バッテリ１によってコントローラに電源
を供給してこれを駆動する。勿論、コード型バッテリユ
ニット２０は、コード型バッテリ１が上述した電源供給
作用を奏する。The cord type battery unit 20 is used, for example, in a portable disk reproducing apparatus, and connects between the main body of the apparatus and a controller. The cord-type battery unit 20 transmits a tone signal from the device main body to the earphone via the controller via the signal cable 21 via the controller so that the earphone is reproduced, and transmits and receives a control signal between the device main body and the controller. Thus, a predetermined control operation is performed. Cord type battery unit 2
Numeral 0 supplies power to the controller by the cord-type battery 1 and drives it. Of course, in the cord-type battery unit 20, the cord-type battery 1 performs the above-described power supply operation.

【００３３】上述したコード型バッテリユニット２０に
おいては、コード型バッテリ１と信号ケーブル２１とが
平行に保持された平行フィーダ型として構成されたが、
かかる構成に限定されるものでは無い。コード型バッテ
リユニット２０は、例えばコード型バッテリ１の内部に
信号ケーブル２１を設けた同軸型として構成してもよ
い。コード型バッテリユニット２０は、この場合芯材と
なる負極材２の負極集電体９が筒状に構成され、その内
部に信号ケーブル２１が導通される。勿論、コード型バ
ッテリユニット２０は、この場合信号ケーブル２１の外
周部に例えばメタルスプレー法によって負極集電体９を
形成するようにしてもよい。In the cord type battery unit 20 described above, the cord type battery 1 and the signal cable 21 are configured as a parallel feeder type which is held in parallel.
The configuration is not limited to this. The cord type battery unit 20 may be configured as a coaxial type in which a signal cable 21 is provided inside the cord type battery 1, for example. In the cord-type battery unit 20, the negative electrode current collector 9 of the negative electrode material 2 serving as a core material in this case is formed in a cylindrical shape, and the signal cable 21 is conducted therein. Of course, in this case, in the cord type battery unit 20, the negative electrode current collector 9 may be formed on the outer peripheral portion of the signal cable 21 by, for example, a metal spray method.

【００３４】[0034]

【発明の効果】以上詳細に説明したように、本発明にか
かるコード型バッテリによれば、電極の外周部に電極活
物質を形成してなる長尺の負極材又は正極材のいずれか
一方の電極材を芯材とし、その外周部に高分子固体電解
質を介して他方の電極材を同軸に設けて外装材によって
封装することにより全体が可撓性を有する長軸のコード
状に構成されることから、電子機器等に備えられるコー
ド自体を電池として構成することで電池の収納スペース
を小型化或いは不要とすることを可能としてその小型軽
量化が図られるする。また、コード型バッテリは、より
大きな長さとすることによって電子機器等を大型化する
こと無く電池の容量を増やすことを可能とすることか
ら、電子機器等を長時間に亘って使用した場合でも電池
の容量が不足するといった事態の発生を低減する。As described above in detail, according to the cord type battery of the present invention, either the long negative electrode material or the positive electrode material having the electrode active material formed on the outer periphery of the electrode. The electrode material is used as a core material, and the other electrode material is coaxially provided on the outer periphery of the core material via a solid polymer electrolyte and sealed with an exterior material. Therefore, by configuring the cord itself provided in the electronic device or the like as a battery, the storage space for the battery can be reduced or made unnecessary, and the size and weight of the battery can be reduced. In addition, the cord-type battery can increase the capacity of the battery without increasing the size of the electronic device or the like by increasing the length, so that the battery can be used even when the electronic device or the like is used for a long time. The occurrence of a situation such as a shortage of capacity is reduced.

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

【図１】本発明にかかるコード型バッテリの縦断面図で
ある。FIG. 1 is a longitudinal sectional view of a cord type battery according to the present invention.

【図２】同コード型バッテリの要部断面図である。FIG. 2 is a sectional view of a main part of the cord type battery.

【図３】同コード型バッテリの一部切欠き要部斜視図で
ある。FIG. 3 is a partially cutaway perspective view of a main part of the cord type battery.

【図４】本発明の第２の実施の形態として示すコード型
バッテリユニットの要部斜視図である。FIG. 4 is a perspective view of a main part of a cord-type battery unit shown as a second embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１ コード型バッテリ、２ 負極材、３ 高分子固体電
解質、４ 正極材、５絶縁チューブ、６ 封止剤、７
負極端子、８ 正極端子、９ 負極集電体、１０ 負極
活物質、１１ 正極集電体、１２ 正極活物質、２０
コード型バッテリユニット、２１ 信号ケーブル1 cord-type battery, 2 negative electrode material, 3 polymer solid electrolyte, 4 positive electrode material, 5 insulating tube, 6 sealant, 7
Negative electrode terminal, 8 positive electrode terminal, 9 negative electrode current collector, 10 negative electrode active material, 11 positive electrode current collector, 12 positive electrode active material, 20
Cord type battery unit, 21 signal cable

───────────────────────────────────────────────────── フロントページの続き (72)発明者 中野 留美 東京都品川区北品川６丁目７番35号 ソニ ー株式会社内 (72)発明者 野田 和宏 東京都品川区北品川６丁目７番35号 ソニ ー株式会社内 Ｆターム(参考） 5H029 AJ03 AJ14 AK02 AK03 AK05 AL02 AL06 AL07 AL12 AL16 AM00 AM03 AM05 AM07 AM16 BJ00 BJ16 CJ02 CJ22 CJ23 DJ02 DJ05 DJ07 DJ11 EJ01 EJ12  ──────────────────────────────────────────────────続 き Continued on the front page (72) Rumi Nakano, Inventor 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Kazuhiro Noda 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F term (reference) 5H029 AJ03 AJ14 AK02 AK03 AK05 AL02 AL06 AL07 AL12 AL16 AM00 AM03 AM05 AM07 AM16 BJ00 BJ16 CJ02 CJ22 CJ23 DJ02 DJ05 DJ07 DJ11 EJ01 EJ12

Claims (9)

【特許請求の範囲】[Claims] 【請求項１】 それぞれ電極の外周部に電極活物質を形
成してなる長尺の負極材又は正極材のいずれか一方の電
極材を芯材とし、その外周部に高分子固体電解質を介し
て他方の電極材を同軸に設け、これらを外装材によって
封装することにより全体が可撓性を有するコード状に構
成されたことを特徴とするコード型バッテリ。1. A long negative electrode material or a positive electrode material having an electrode active material formed on an outer peripheral portion of each electrode is used as a core material, and an outer peripheral portion of the electrode material is interposed with a polymer solid electrolyte. A cord-type battery in which the other electrode material is provided coaxially and sealed with an exterior material to form a flexible cord as a whole. 【請求項２】 芯材となる上記負極材又は正極材のいず
れか一方の電極材は、上記電極が金属線材によって形成
されたことを特徴とする請求項１に記載のコード型バッ
テリ。2. The cord-type battery according to claim 1, wherein one of the negative electrode material and the positive electrode material serving as a core material has the electrode formed of a metal wire. 【請求項３】 芯材となる上記電極材は、負極材であ
り、上記電極がリチウム金属線により形成されたことを
特徴とする請求項２に記載のコード型バッテリ。3. The cord-type battery according to claim 2, wherein the electrode material serving as a core material is a negative electrode material, and the electrode is formed of a lithium metal wire. 【請求項４】 芯材となる上記負極材又は正極材のいず
れか一方の電極材は、上記電極活物質が上記集電体の外
周部にディップ法によって塗布形成されることを特徴と
する請求項１に記載のコード型バッテリ。4. An electrode material of one of the negative electrode material and the positive electrode material serving as a core material, wherein the electrode active material is formed by applying a dip method to an outer peripheral portion of the current collector. Item 2. A cord-type battery according to item 1. 【請求項５】 外側となる上記正極材又は負極材のいず
れか一方の電極材は、上記電極が上記高分子固体電解質
の外周部にメタルスプレー法によって形成されることを
特徴とする請求項１に記載のコード型バッテリ。5. The electrode material of one of the positive electrode material and the negative electrode material on the outside, wherein the electrode is formed on the outer periphery of the solid polymer electrolyte by a metal spray method. A cord-type battery according to claim 1. 【請求項６】 上記外装材には、加熱処理が施されるこ
とによって縮径して外側の電極材に密着する熱収縮性の
合成樹脂チューブが用いられることを特徴とする請求項
１に記載のコード型バッテリ。6. A heat-shrinkable synthetic resin tube which is reduced in diameter by being subjected to a heat treatment and is in close contact with an outer electrode material is used as the exterior material. Cord type battery. 【請求項７】 上記高分子固体電解質は、イオン導電性
を有し、上記電極を介して外部電源が供給されることに
よって充電が可能な二次電池を構成することを特徴とす
る請求項１に記載のコード型バッテリ。7. The secondary battery according to claim 1, wherein the solid polymer electrolyte has ionic conductivity and can be charged when external power is supplied through the electrode. A cord-type battery according to claim 1. 【請求項８】 上記負極材は、銅製の負極集電体の外周
部にリチウムイオンをドープ／脱ドープ可能とする炭素
系材料からなる負極活物質が塗布されてなり、 上記正極材は、アルミニウム製の正極集電体の内周部に
リチウムを含む遷移金属酸化物からなる正極活物質が塗
布されてなり、リチウムイオン二次電池を構成すること
を特徴とする請求項７に記載のコード型バッテリ。8. The negative electrode material is formed by coating a negative electrode active material made of a carbon-based material capable of doping / dedoping lithium ions around the outer periphery of a negative electrode current collector made of copper. The cord type according to claim 7, wherein a positive electrode active material made of a transition metal oxide containing lithium is applied to an inner peripheral portion of a positive electrode current collector made of a lithium ion secondary battery. Battery. 【請求項９】 電子機器間に接続されて信号等を送受信
する信号ケーブルと一体化されることを特徴とする請求
項１に記載のコード型バッテリ。9. The cord-type battery according to claim 1, wherein the cord-type battery is integrated with a signal cable connected between electronic devices for transmitting and receiving signals and the like.
JP28978099A 1999-10-12 1999-10-12 Cord type battery Withdrawn JP2001110445A (en)

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