JPH065291A - Manufacture of thin battery - Google Patents
Manufacture of thin batteryInfo
- Publication number
- JPH065291A JPH065291A JP4188797A JP18879792A JPH065291A JP H065291 A JPH065291 A JP H065291A JP 4188797 A JP4188797 A JP 4188797A JP 18879792 A JP18879792 A JP 18879792A JP H065291 A JPH065291 A JP H065291A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- substance
- active material
- thin
- negative 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.)
- Pending
Links
Classifications
-
- Y02E60/12—
Landscapes
- Primary Cells (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、エレクトロニクス機
器、玩具、アクセサリ−、電気自動車などの分野に使わ
れる薄形電池及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin battery used in the fields of electronic equipment, toys, accessories, electric vehicles and the like, and a method for manufacturing the thin battery.
【０００２】[0002]
【従来の技術】薄形電池は正極集電体の周縁に接着剤を
配置し、該正極集電体の内面中央域（接着剤の介在しな
い領域）に正極活物質を配置し、さらに該正極活物質面
上に電解質を配置し正極板を作製する。また負極集電体
の周縁に前記正極用接着剤枠より内寸が僅かに小さい負
極用接着剤枠体を配置し、該負極集電体の内面中央域に
負極活物質例えばリチウム又はカ−ボンを配置し、さら
に又は該負極活物質面上に電解質を配置して負極板を作
製する。このようにして作製された正極板及び負極板を
互いに内面同士を重ね合わせ、減圧状態下で前記正極・
負極接着剤を集電体の上から加圧しながらヒ−トシ−ル
し、電池内部を減圧状態で密閉することにより電池を作
製していた。2. Description of the Related Art In a thin battery, an adhesive is arranged on the periphery of a positive electrode current collector, and a positive electrode active material is arranged in the central area (area where no adhesive is present) of the positive electrode current collector. An electrolyte is arranged on the surface of the active material to produce a positive electrode plate. Further, a negative electrode adhesive frame whose inner size is slightly smaller than the positive electrode adhesive frame is arranged on the periphery of the negative electrode current collector, and a negative electrode active material such as lithium or carbon is provided in the central area of the inner surface of the negative electrode current collector. And the electrolyte is further arranged on the surface of the negative electrode active material to prepare a negative electrode plate. The positive electrode plate and the negative electrode plate produced in this manner were laminated on each other with their inner surfaces being overlapped with each other, and the positive electrode
A battery was produced by heat-sealing the negative electrode adhesive while pressing it from above the current collector and sealing the inside of the battery in a reduced pressure state.
【０００３】しかしながら、この減圧密閉工程は、正極
板及び負極板などの電池構成部品を単体で、減圧装置内
に配置し、電池一つ一つについてヒ−トシ−ルするた
め、電池作製工程がバッチ方式となり生産性が極めて悪
く、また生産工程も不連続となり個々の極板を移動さ
せ、且つ電池構成部品が薄いため極板位置を正確に決定
することなどが難しく、生産設備を複雑にする必要があ
ると共に、完成した電池では電池内部に電気的短絡が発
生したりする場合があった。薄形電池は厚さが薄く、エ
ネルギ−密度が高く、且つ簡便名方法で生産されること
が要求されている。However, in this depressurizing and sealing step, battery components such as the positive electrode plate and the negative electrode plate are individually placed in the depressurizing device, and each battery is heat-sealed. It becomes a batch system, productivity is extremely poor, the production process becomes discontinuous, individual plates are moved, and it is difficult to accurately determine the plate position because the battery component parts are thin, which complicates the production equipment. In addition to the necessity, the completed battery may cause an electrical short circuit inside the battery. Thin batteries are required to be thin, have high energy density, and be produced by a simple name method.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記問題点に
鑑みてなされたものであって、その目的とするところは
電池生産性が優れ、電池性能が安定化でき、電池歩留率
の優れた薄形電池を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to have excellent battery productivity, stable battery performance, and excellent battery yield rate. To provide a thin battery.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するもので、正極集電体と負極集電体の間に正極活物
質、電解質、負極活物質を配置し、集電体周縁を接着材
で密閉してなる薄形電池及びその製造方法において、電
池内部に電池生産雰囲気ガス成分と反応する物質が充填
され、且つ該ガス雰囲気で電池を密閉すること、前記雰
囲気ガス成分が電池内部の前記物質により反応または吸
収され、電池密閉後に電池内が減圧状態となることなど
を特徴とし、これにより上述の問題点を解決するもので
ある。Means for Solving the Problems The present invention achieves the above object. A positive electrode active material, an electrolyte, and a negative electrode active material are arranged between a positive electrode current collector and a negative electrode current collector, and a peripheral edge of the current collector is provided. In a thin battery sealed by an adhesive and a method for manufacturing the same, the inside of the battery is filled with a substance that reacts with an atmospheric gas component for battery production, and the battery is hermetically sealed in the gas atmosphere. The above-mentioned problem is solved by the reaction or absorption by the above substance, and the inside of the battery is in a reduced pressure state after the battery is sealed.
【０００６】[0006]
【作用】電池内に配置された電池生産雰囲気ガス成分と
反応する物質、例えば酸素反応物質、二酸化炭素反応物
質、窒素反応物質などが、該ガス成分雰囲気中で電池が
密閉された後、電池内に閉じ込められた該ガス成分と反
応し、電池内のガス成分分圧量だけ電池内が減圧され
（なお電池生産雰囲気ガスがすべて電池内に充填された
ガス反応物質と反応すれば減圧度は高まる。）、電池内
部が減圧状態となるので、電池を構成している各層の密
着性が優れ、電気的接触抵抗が低下し、これによりク−
ロン効率や、集電効率を向上させることが出来る。また
減圧工程が不必要であるので、電池を個々に分断する必
要がなく、一貫した連続方式を採用でき、個々の極板の
移送機構及び減圧設備・工程が不要となり、生産設備が
簡略化でき生産性に優れる。尚、本発明において使用す
る該物質としては、アルカリ金属、Ｆｅ2 Ｏ3 、Ｆｅ、
Ｍｇ、Ｃａ、Ｚｎ、Ｓｎ、Ｍｎ、Ｐｂ，Ｔｉなどが挙げ
られるが、電池特性を低下させないものであれば、一般
的な還元剤、有機物質も全て使用することが出来、場合
によっては、ガス反応効率を向上させるために熱処理や
触媒の使用も可能である。A substance which reacts with a gas component in a battery producing atmosphere disposed in the battery, such as an oxygen reactant, a carbon dioxide reactant, a nitrogen reactant, etc., is sealed in the gas component atmosphere, Reacts with the gas component trapped in the battery, and the pressure inside the battery is reduced by the partial pressure of the gas component inside the battery. (If all the gas produced in the battery reacts with the gas reactants filled in the battery, the degree of pressure reduction increases. ), Since the inside of the battery is in a depressurized state, the adhesion of each layer constituting the battery is excellent, and the electrical contact resistance is reduced, which causes
Ron efficiency and current collection efficiency can be improved. In addition, since the depressurization process is unnecessary, it is not necessary to divide the battery into individual cells, a consistent continuous system can be adopted, and a transfer mechanism for individual electrode plates and depressurization equipment / processes are not required, simplifying production equipment. Excellent productivity. The substances used in the present invention include alkali metals, Fe 2 O 3 , Fe,
Examples thereof include Mg, Ca, Zn, Sn, Mn, Pb, and Ti, but general reducing agents and organic substances can all be used as long as they do not deteriorate the battery characteristics, and in some cases, gas is used. Heat treatment and the use of catalysts are also possible to improve the reaction efficiency.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。なお、ここでは電池生産雰囲気ガス成分として特
別な付帯設備が不要な酸素ガスについて説明する。Embodiments of the present invention will be described below with reference to the drawings. It should be noted that oxygen gas, which does not require special incidental equipment, will be described as a gas component for battery production atmosphere.
【０００８】（実施例１）図１に本発明に係わる薄形電
池の断面図を示す。約１０μｍ〜２０μｍのステンレス
製の負極集電体１の周縁に正極用の接着剤６より内寸が
約１．５ｍｍ小さい負極用接着剤２を仮接着した。次に
負極活物質３としてのリチウムを負極集電体１の内側
（即ち負極用接着剤２枠の内側）に圧着（例えばロ−ル
加圧による転写）し、さらにその上に電解質４を配置し
負極板（ａ）を作製した。(Embodiment 1) FIG. 1 is a sectional view of a thin battery according to the present invention. A negative electrode adhesive 2 having an inner dimension smaller than that of the positive electrode adhesive 6 by about 1.5 mm was temporarily adhered to the periphery of the stainless negative electrode current collector 1 having a thickness of about 10 μm to 20 μm. Next, lithium as the negative electrode active material 3 is pressure-bonded (for example, transferred by roll pressure) to the inside of the negative electrode current collector 1 (that is, the inside of the negative electrode adhesive 2 frame), and the electrolyte 4 is further arranged thereon. Then, a negative electrode plate (a) was produced.
【０００９】一方、アンダ−コ−トした約１０μｍ〜２
０μｍのステンレス製の正極集電体５の周縁にＰＰ、Ｐ
ＥＴなどの樹脂を金属薄膜（アルミニウム、ステンレス
など）の内外面に被覆した接着剤６の枠体を仮接着し、
その内側に周縁部約０．５ｍｍ幅を残し、例えばＭｎＯ
2 のような正極活物質にアセチレンブラックなどの導電
剤、フッ素樹脂のような結着剤を定量混合した正極物質
７を印刷、塗布、吹きつけなどで配置した後、熱硬化、
電子線硬化などで正極物質７を硬化させた。次に正極物
質７の周縁部と接着剤６との間隙８に電池生産雰囲気ガ
ス成分である酸素と反応する物質としてＭｎ微粉体を配
置した。次に、これらの正極板（ｂ）と負極板（ａ）の
活物質面を互いに向き合わせ、酸素ガス分圧下で見当合
わせし、圧着後、接着剤２及び６を互いに熱融着し接着
した。On the other hand, the undercoat is about 10 μm to 2 μm.
PP and P are attached to the periphery of the positive electrode current collector 5 of 0 μm made of stainless steel.
A frame body of an adhesive agent 6 in which a resin such as ET is coated on the inner and outer surfaces of a metal thin film (aluminum, stainless steel, etc.) is temporarily adhered,
A peripheral portion of about 0.5 mm width is left inside, for example, MnO.
A positive electrode material 7 obtained by quantitatively mixing a positive electrode active material such as 2 with a conductive agent such as acetylene black and a binder such as a fluororesin is arranged by printing, coating, spraying, etc., and then heat curing,
The positive electrode material 7 was cured by electron beam curing or the like. Next, Mn fine powder was placed in the gap 8 between the peripheral portion of the positive electrode substance 7 and the adhesive 6 as a substance that reacts with oxygen, which is a gas component for producing the battery atmosphere. Next, the active material surfaces of the positive electrode plate (b) and the negative electrode plate (a) are opposed to each other, and they are aligned under oxygen gas partial pressure, and after pressure bonding, the adhesives 2 and 6 are heat-sealed and bonded to each other. .
【００１０】このようにして得られた薄形電池（ｃ）は
電池内部特に正極活物質７と接着剤６との間隙８（及び
僅かではあるが、電解質４と正極活物質７との隙間部
分）に介在する酸素ガス圧（又は酸素分圧）の為、１気
圧または接着剤２及び６の接着時の熱で薄形電池が冷却
された時、多少減圧状態となる。The thin battery (c) thus obtained has a gap 8 between the inside of the battery, in particular, the positive electrode active material 7 and the adhesive 6 (and a slight gap between the electrolyte 4 and the positive electrode active material 7). Due to the oxygen gas pressure (or oxygen partial pressure) present in (1), when the thin battery is cooled by 1 atm or heat when the adhesives 2 and 6 are bonded, the thin battery is slightly decompressed.
【００１１】次に、薄形電池を約１日、８０℃で保存し
た。保存後、上記電池内の酸素がマンガンと反応して減
少し、酸素分圧が低下したため電池内圧は減圧状態とな
った。その時の圧力は約０．１気圧であった。さらに電
池容量を測定したところ、表に示す如く、５２ｍＡｈ〜
５５ｍＡｈ（公称容量５０ｍＡｈ）であった。またマン
ガンの代わりにＦｅ2 Ｏ3 を用いても同様な結果が得ら
れた。Next, the thin battery was stored at 80 ° C. for about 1 day. After storage, the oxygen in the battery was reacted with manganese and decreased, and the oxygen partial pressure decreased, so that the internal pressure of the battery was reduced. The pressure at that time was about 0.1 atm. Further, when the battery capacity was measured, as shown in the table, 52 mAh
It was 55 mAh (nominal capacity 50 mAh). Similar results were obtained when Fe 2 O 3 was used instead of manganese.
【００１２】（実施例２）他の実施例として、図１の薄
形電池を作製するとき、前記間隙８を正極側に設けない
で負極側、すなわち負極活物質３と接着剤２との間に設
け、さらに電解質４を正極活物質７側に設け、該間隙９
（但し図示されていない）にリチウム粉体１０を充填
（なお該間隙９に何も充填せず、負極活物質３としての
リチウムの端部が露出するようにするだけでもよい。ま
た該リチウムの端部露出部が活性化するようにしておく
となお一層効果がある。）した。この時の電池内圧は約
０．０７気圧であり、電池容量は約５３ｍＡｈ〜５５ｍ
Ａｈであった。(Example 2) As another example, when the thin battery of FIG. 1 was manufactured, the gap 8 was not provided on the positive electrode side, but between the negative electrode side, that is, between the negative electrode active material 3 and the adhesive 2. And the electrolyte 4 on the positive electrode active material 7 side.
The lithium powder 10 (not shown) may be filled (note that the gap 9 is not filled with anything and only the end of lithium as the negative electrode active material 3 is exposed). It is even more effective if the exposed end portions are activated.) At this time, the internal pressure of the battery was about 0.07 atm, and the battery capacity was about 53 mAh to 55 m.
It was Ah.
【００１３】（比較例１）実施例１と同様な構成で真空
状態下で密閉シ−ルした場合、電池内圧は約０．０１気
圧で、電池容量は約５２ｍＡｈ〜５５ｍＡｈであった。(Comparative Example 1) When the structure was the same as that of Example 1 and sealed under vacuum, the internal pressure of the battery was about 0.01 atm and the battery capacity was about 52 mAh to 55 mAh.
【００１４】（比較例２）実施例１と同様な構成でアル
ゴンガスフロ−中で密閉シ−ルした場合、電池内圧は約
１気圧で、電池容量は約２４ｍＡｈ〜３７ｍＡｈであっ
た。これらの結果を表１に示す。(Comparative Example 2) When the structure was the same as that of Example 1 and sealed in an argon gas flow, the internal pressure of the battery was about 1 atm and the battery capacity was about 24 mAh to 37 mAh. The results are shown in Table 1.
【００１５】 [0015]
【００１６】なお電池容量測定は各５セルで行った。以
上のことから本発明による薄形電池及び従来の減圧密閉
薄形電池においては、公称電池容量５０ｍＡｈを充分満
足する電池容量が得られた。このことは電池製作後に電
池内が減圧状態になることで、集電体内面に配置された
各活物質の密着性が高まり、電池内部抵抗が減少したこ
と、及び接触が均一となり安定することで電池間の性能
バラツキがなくなったことによるものである。また、従
来の真空密閉工程は連続して生産されてきた各極板が、
この工程で不連続なバッチ式となり、且つ連続極板を分
断する必要から余分な設備及び工程を要し、且つ分断さ
れた極板のその後の移送工程をも複雑にするなど、従来
の真空密閉工程は本薄形電池生産プロセスの上で大きな
問題であったが、以上に示されるように本発明は生産性
の上でも大いに改善された。The battery capacity was measured for each 5 cells. From the above, in the thin battery according to the present invention and the conventional vacuum sealed thin battery, a battery capacity sufficiently satisfying the nominal battery capacity of 50 mAh was obtained. This means that after the battery is manufactured, the inside of the battery is in a depressurized state, the adhesion of each active material arranged on the inner surface of the current collector is increased, the internal resistance of the battery is decreased, and the contact becomes uniform and stable. This is because there is no variation in performance between batteries. In addition, each electrode plate that has been continuously produced in the conventional vacuum sealing process,
In this process, it becomes a batch type that is discontinuous, requires extra equipment and processes because it is necessary to divide the continuous electrode plate, and complicates the subsequent transfer process of the divided electrode plate. Although the process was a big problem in the present thin battery production process, as shown above, the present invention was greatly improved in productivity.
【００１７】[0017]
【発明の効果】上述したごとく、本発明は次に記載する
効果を奏する。 （１）薄形電池において減圧工程を設ける必要がない。 （２）電池内のガスと反応する物質により、ガス分圧を
低下せしめ、電池内圧を低下せしめ、電池内を減圧密閉
状態にする。 （３）電池が連続で生産でき生産能力を高めることがで
きる。 （４）各電池構成部品の密着性を高めク−ロン効率、集
電効率を高めることができる。 （５）電池生産工程が簡略化できる。 （６）正極及び負極の集電効果を高め、且つ両極間の電
気絶縁性を高める。 （７）ヒ−トシ−ルが容易となる。 なお本発明は以上の実施例に限るものではなく、必要に
応じて充填物質、電池構造、該物質充填箇所、該物質状
態（混合物、単体、化合物など）など変更しうるもので
ある。As described above, the present invention has the following effects. (1) It is not necessary to provide a decompression step in the thin battery. (2) A substance that reacts with the gas in the battery lowers the gas partial pressure, lowers the battery internal pressure, and puts the inside of the battery in a depressurized and sealed state. (3) Batteries can be continuously produced and production capacity can be increased. (4) The adhesion of each battery component can be improved, and the cron efficiency and the current collection efficiency can be improved. (5) The battery production process can be simplified. (6) The current collecting effect of the positive electrode and the negative electrode is enhanced, and the electrical insulation between the both electrodes is enhanced. (7) The heat seal becomes easy. The present invention is not limited to the above embodiments, but the filling substance, the battery structure, the place of filling the substance, the state of the substance (mixture, simple substance, compound, etc.) can be changed as necessary.
【図１】本発明に係わる薄形電池の構成を示す断面図で
ある。FIG. 1 is a cross-sectional view showing a configuration of a thin battery according to the present invention.
【符号の説明】 １ 負極集電体 ２ 負極用接着剤 ３ 負極活物質 ４ 電解質 ５ 正極集電体 ６ 正極用接着剤 ７ 正極物質 ８ 隙間 （ａ） 負極板 （ｂ） 正極板 （ｃ） 薄形電池[Explanation of Codes] 1 Negative electrode current collector 2 Negative electrode adhesive 3 Negative electrode active material 4 Electrolyte 5 Positive electrode current collector 6 Positive electrode adhesive 7 Positive electrode material 8 Gap (a) Negative electrode plate (b) Positive electrode plate (c) Thin Shaped battery
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村田 和雄 大阪府高槻市城西町６番６号 湯浅電池株 式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Murata 6-6 Josaimachi, Takatsuki City, Osaka Prefecture Yuasa Battery Co., Ltd.
Claims (2)
質、電解質、負極活物質を配置し、集電体周縁を接着材
で密閉してなる薄形電池の製造方法において、電池内部
に電池生産雰囲気ガス成分と反応する物質が充填され、
且つ該ガス雰囲気中で電池を密閉することを特徴とする
薄形電池の製造方法。1. A method of manufacturing a thin battery, comprising a positive electrode active material, an electrolyte, and a negative electrode active material disposed between a positive electrode current collector and a negative electrode current collector, and the periphery of the current collector being sealed with an adhesive. The inside of the battery is filled with a substance that reacts with the gas components in the battery production atmosphere,
A method for manufacturing a thin battery, which comprises sealing the battery in the gas atmosphere.
質により反応または吸収され、電池密閉後に電池内が減
圧状態となることを特徴とする請求項１記載の薄形電池
の製造方法。2. The method for manufacturing a thin battery according to claim 1, wherein the atmospheric gas component is reacted or absorbed by the substance inside the battery, and the inside of the battery is in a reduced pressure state after the battery is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4188797A JPH065291A (en) | 1992-06-22 | 1992-06-22 | Manufacture of thin battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4188797A JPH065291A (en) | 1992-06-22 | 1992-06-22 | Manufacture of thin battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH065291A true JPH065291A (en) | 1994-01-14 |
Family
ID=16229972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4188797A Pending JPH065291A (en) | 1992-06-22 | 1992-06-22 | Manufacture of thin battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH065291A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10620325B2 (en) | 2013-12-20 | 2020-04-14 | Korea Atomic Energy Research Institute | Different radiation measuring sensor and manufacturing method thereof |
-
1992
- 1992-06-22 JP JP4188797A patent/JPH065291A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10620325B2 (en) | 2013-12-20 | 2020-04-14 | Korea Atomic Energy Research Institute | Different radiation measuring sensor and manufacturing method thereof |
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