JPH10270072A - Manufacture of nonaqueous electrolyte secondary battery - Google Patents

Manufacture of nonaqueous electrolyte secondary battery

Info

Publication number
JPH10270072A
JPH10270072A JP9068087A JP6808797A JPH10270072A JP H10270072 A JPH10270072 A JP H10270072A JP 9068087 A JP9068087 A JP 9068087A JP 6808797 A JP6808797 A JP 6808797A JP H10270072 A JPH10270072 A JP H10270072A
Authority
JP
Japan
Prior art keywords
sheets
aqueous electrolyte
unsealed
power generating
power generation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP9068087A
Other languages
Japanese (ja)
Other versions
JP3787942B2 (en
Inventor
Hisashi Tsukamoto
寿 塚本
Yoichiro Arima
要一郎 有馬
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.)
Japan Storage Battery Co Ltd
Original Assignee
Japan Storage Battery 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 Japan Storage Battery Co Ltd filed Critical Japan Storage Battery Co Ltd
Priority to JP06808797A priority Critical patent/JP3787942B2/en
Publication of JPH10270072A publication Critical patent/JPH10270072A/en
Application granted granted Critical
Publication of JP3787942B2 publication Critical patent/JP3787942B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 of a single cell or a single battery
    • H01M50/14—Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors
    • H01M50/141—Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors for protecting against humidity
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/121—Organic material
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • 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
    • H01M50/557—Plate-shaped terminals
    • 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 provide a manufacturing method of a nonaqueous electrolyte secondary battery for easily carrying the batteries on a manufacturing line by storing a number of generating elements between continuously long aluminum laminate sheets to do sealing wok and filing, preliminarily charging and evacuating work for nonaqueous electrolyte in sequence. SOLUTION: Generating elements 1 are stored at preset spaces between two long aluminum laminate sheets 2, 4 lapping each other and the aluminum laminate sheets 2, 4 around the generating elements 1, except in non-sealed paths 5, are heated and forced for sealing. Recesses 2a in which the generating elements 1 are stored are depressuried to fill nonaqueous electrolyte 9 and preliminarily change the generating elements 1. The recesses 2a in which the generating elements 1 are stored are depressurized again to fill the shortage of the nonqueous electrolyte 9 and heat and force the aluminum laminate sheets 2, 4 lapping each other in the non-sealed paths 5 for sealing.

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、発電要素をシート
で覆って密閉した非水電解質二次電池の製造方法に関す
る。The present invention relates to a method for manufacturing a nonaqueous electrolyte secondary battery in which a power generation element is covered with a sheet and hermetically sealed.

【０００２】[0002]

【従来の技術】非水電解質二次電池には、発電要素（電
池エレメント）を、この発電要素の正負極に接続される
リードの先端部のみを突出させてアルミラミネートシー
トで覆い、内部に非水電解液を満たして密閉したものが
ある。例えばカード型二次電池は、このようなアルミラ
ミネートシートで密封した非水電解質二次電池をカード
型の外装ケース内に収納している。非水電解質二次電池
は、水溶液電解質二次電池の場合と異なり、充電時に発
電要素からほとんどガスが発生しないので、このような
アルミラミネートシートによる密閉が可能となる。2. Description of the Related Art In a non-aqueous electrolyte secondary battery, a power generation element (battery element) is covered with an aluminum laminate sheet by projecting only the tips of leads connected to the positive and negative electrodes of the power generation element. Some are filled with water electrolyte and sealed. For example, in a card type secondary battery, a non-aqueous electrolyte secondary battery sealed with such an aluminum laminate sheet is housed in a card type outer case. Unlike the aqueous electrolyte secondary battery, the nonaqueous electrolyte secondary battery generates almost no gas from the power generation element during charging, and thus can be hermetically sealed with such an aluminum laminate sheet.

【０００３】上記従来のアルミラミネートシートで密封
した非水電解質二次電池は、１個の電池ごとにアルミラ
ミネートシートの袋を作成して、この袋の中に発電要素
を収納すると共に非水電解液を満たし、この袋の開口部
をリードの先端部が突出した状態で封口することにより
製造していた。[0003] In the conventional non-aqueous electrolyte secondary battery sealed with an aluminum laminate sheet, a bag of an aluminum laminate sheet is formed for each battery, and a power generation element is accommodated in the bag and the non-aqueous electrolyte battery is stored. It has been manufactured by filling the bag with a liquid and closing the opening of the bag with the leading end of the lead protruding.

【０００４】[0004]

【発明が解決しようとする課題】ところが、非水電解質
二次電池には、最初の充電時にのみ負極の被膜形成反応
によって発電要素の極板間からガスが発生するものがあ
るので、この場合には、非水電解液を注入した後に予備
充電を行いガスの発生を完了させてから、アルミラミネ
ートシートの袋の開口部を完全に封口する必要がある。
また、発電要素が内部に空気を含んでいると、非水電解
液を注入しても極板間に十分に充填されなかったり、予
備充電で発生したガスが大気圧中では発電要素の極板間
から十分に抜け切らないので、これらの作業の際には、
アルミラミネートシートの袋の内部を真空引きによって
減圧することが好ましい。However, in some non-aqueous electrolyte secondary batteries, gas is generated from between the plates of the power generating element by a film forming reaction of the negative electrode only at the time of first charging. It is necessary to completely close the opening of the bag of the aluminum laminated sheet after precharging after injecting the non-aqueous electrolyte to complete gas generation.
In addition, if the power generating element contains air inside, even if a non-aqueous electrolyte is injected, the space between the electrodes will not be sufficiently filled, or if the gas generated during pre-charging is at atmospheric pressure, the electrode of the power generating element will not be filled. Because it is not enough to get out of between,
It is preferable to depressurize the inside of the bag of the aluminum laminate sheet by evacuation.

【０００５】しかし、上記従来の製造方法では、発電要
素を収納したアルミラミネートシートの袋を１個ずつ搬
送し、開口部を上向きにして非水電解液を注入すると共
に、予備充電や真空引きを行った後に開口部を封口する
作業を行わなければならない。このため、従来の非水電
解質二次電池の製造方法では、製造ラインにおける搬送
部等の構成が複雑となり、設備のコストが高くなりすぎ
るという問題があった。However, in the above-mentioned conventional manufacturing method, the aluminum laminate sheet containing the power generating element is transported one by one, the non-aqueous electrolyte is injected with the opening facing upward, and the preliminary charging and evacuation are performed. After that, the operation of closing the opening must be performed. For this reason, the conventional method of manufacturing a nonaqueous electrolyte secondary battery has a problem in that the configuration of the transport section and the like in the manufacturing line is complicated, and the cost of the equipment becomes too high.

【０００６】本発明は、かかる事情に鑑みてなされたも
のであり、連続した長尺なシートを重ね合わせた間に発
電要素を所定間隔で多数収納し、順次封口や非水電解液
の注入、予備充電、真空引き等の作業を行うことによ
り、製造ライン上の電池の搬送が容易となる非水電解質
二次電池の製造方法を提供することを目的としている。The present invention has been made in view of the above circumstances, and accommodates a large number of power generating elements at predetermined intervals while superposing continuous long sheets, and sequentially seals or injects a non-aqueous electrolyte. It is an object of the present invention to provide a method for manufacturing a non-aqueous electrolyte secondary battery in which a battery is easily transported on a manufacturing line by performing operations such as preliminary charging and vacuuming.

【０００７】[0007]

【課題を解決するための手段】即ち、請求項１の非水電
解質二次電池の製造方法は、上記課題を解決するため
に、２枚の長尺なシートを重ね合わせた間に、又は、
１枚の長尺なシートの一方の側辺部を折り返して重ね合
わせた間に、所定間隔で発電要素を収納する工程と、重
ね合わせたシートにおける各発電要素の収納部の周囲
を、この収納部からシートの側辺に至る適宜の未封口経
路を除いて、これらのシートの間に挟持された発電要素
のリードの全部又は一部と共に封口する工程と、封口し
たシートの間における各発電要素の収納部内を未封口経
路を通じて真空引きし減圧する工程と、減圧した各発電
要素の収納部内に未封口経路を通して非水電解液を注入
する工程と、収納部に非水電解液を満たした各発電要素
をこの発電要素のリードを通じて予備充電する工程と、
予備充電した各発電要素の収納部内を未封口経路を通じ
て再度真空引きし減圧する工程と、未封口経路で重なり
合うシートを封口する工程とを備えたことを特徴とす
る。In order to solve the above-mentioned problems, a method for manufacturing a non-aqueous electrolyte secondary battery according to the present invention is performed while two long sheets are stacked, or
A step of storing the power generating elements at a predetermined interval while one side of one long sheet is folded back and superimposed, and a step of storing the power generating elements around the storage section of each power generating element in the superimposed sheet. A step of sealing together with all or a part of the leads of the power generating element sandwiched between these sheets, except for an appropriate unsealed path from the section to the side of the sheet, and each power generating element between the sealed sheets. A step of evacuating and depressurizing the inside of the storage section through the unsealed path, a step of injecting the nonaqueous electrolyte through the unsealed path into the storage section of each decompressed power generating element, and a step of filling the storage section with the nonaqueous electrolyte. Pre-charging the power generating element through a lead of the power generating element;
The method further comprises a step of evacuating the inside of the storage portion of each of the pre-charged power generating elements again through an unsealed path to reduce the pressure, and a step of sealing the overlapping sheets in the unsealed path.

【０００８】の手段によれば、長尺な２枚のシートの
間に、又は、長尺な１枚のシートを折り返した間に、多
数の発電要素を挟んでそれぞれ密封するので、このシー
トを送るだけで、各発電要素の収納部内を真空引きし、
この収納部内に非水電解液を注入し、各発電要素を予備
充電する等の作業を連続的に行うことができる。According to the means, since a large number of power generating elements are sandwiched between two long sheets or while one long sheet is folded, the sheets are sealed. Just send it, vacuum the inside of the storage section of each power generation element,
Operations such as injecting a non-aqueous electrolyte into the storage portion and precharging each power generation element can be performed continuously.

【０００９】なお、未封口経路は、例えば、加熱した金
型のプレス面に溝を形成しておいて、この溝部でのみシ
ートが熱溶着しないようにして形成したり、フッ素樹脂
等のように耐熱性があり接着し難い樹脂からなるパイプ
や薄板等をシート間に挿入しておいて、このシートを加
熱圧迫してもパイプや薄板等の挿入部では熱溶着しない
ようにして形成することができる。The unsealed path is formed, for example, by forming a groove on the press surface of a heated mold so that the sheet is not heat-welded only at the groove, or by using a material such as fluororesin. A pipe or thin plate made of a heat-resistant resin that is difficult to adhere is inserted between the sheets, and even if this sheet is heated and pressed, it can be formed so as not to be welded at the inserted portion of the pipe or the thin plate. it can.

【００１０】また、各発電要素の収納部内を未封口経路
を通じて真空引きし減圧する工程では、封口したシート
における各発電要素の収納部の周囲をチャンバー等で覆
って、このチャンバー等の内部を真空引きすることによ
り、収納部内だけでなくその周囲も減圧することが好ま
しい。In the step of evacuating and decompressing the inside of the storage section of each power generation element through an unsealed path, the periphery of the storage section of each power generation element in the sealed sheet is covered with a chamber or the like, and the inside of the chamber or the like is evacuated. By pulling, it is preferable to reduce the pressure not only in the storage section but also around the storage section.

【００１１】さらに、各発電要素を予備充電する工程で
は、この発電要素のリードが封口したシート間から突出
したり、このシートの開口窓から露出していない場合に
は、このシートの一部を剥がしたりめくってから充電器
に接続する必要がある。Further, in the step of pre-charging each power generation element, if the leads of this power generation element protrude from between the sealed sheets or if they are not exposed from the opening window of this sheet, a part of this sheet is peeled off. It is necessary to turn over before connecting to the charger.

【００１２】請求項２の非水電解質二次電池の製造方法
は、前記の未封口経路で重なり合うシートを封口す
る工程の前に、再度の真空引きにより減圧した各発電要
素の収納部内に未封口経路を通して非水電解液の不足分
を注入する工程を挿入したことを特徴とする。In the method of manufacturing a non-aqueous electrolyte secondary battery according to a second aspect, before the step of sealing the overlapping sheets in the unsealed path, the unsealed portions are not sealed in the storage portions of the respective power generating elements which have been depressurized again by evacuation. A step of injecting a shortage of the nonaqueous electrolyte through the passage is inserted.

【００１３】の手段によれば、予備充電によって不足
した非水電解液を補充することができる。According to the means, the non-aqueous electrolyte which has become insufficient due to the preliminary charging can be replenished.

【００１４】請求項３の非水電解質二次電池の製造方法
は、前記の発電要素の収納部内に未封口経路を通
して非水電解液を注入する管路と、発電要素の収納部内
を未封口経路を通じて真空引きする管路とを別系統のも
のにしたことを特徴とする。According to a third aspect of the present invention, there is provided a method for manufacturing a non-aqueous electrolyte secondary battery, comprising: a conduit for injecting a non-aqueous electrolyte through an unsealed passage into the housing of the power generating element; And a separate line is used for the pipe line for evacuation.

【００１５】の手段によれば、非水電解液を注入する
管路と真空引きする管路を共用した場合に、非水電解液
から塩が析出して付着し管路を塞ぐのを防止することが
できる。According to the means, when the pipe for injecting the non-aqueous electrolyte and the pipe for evacuation are used in common, salt is prevented from depositing and adhering from the non-aqueous electrolyte to block the pipe. be able to.

【００１６】[0016]

【発明の実施の形態】以下、本発明の実施形態について
図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.

【００１７】図１〜図２は本発明の一実施形態を示すも
のであって、図１は電池の製造工程を示す正面図、図２
は電池の製造工程における発電要素収納工程の詳細を示
す斜視図である。FIGS. 1 and 2 show an embodiment of the present invention. FIG. 1 is a front view showing a battery manufacturing process.
FIG. 4 is a perspective view showing details of a power generation element housing step in a battery manufacturing process.

【００１８】本実施形態は、発電要素を２枚のアルミラ
ミネートシートで覆って密閉した非水電解質二次電池の
製造方法について説明する。図２に示す発電要素１は、
通常の巻回型と同様に、正負電極とセパレータとを巻回
して円筒形とし、正負電極に接続されたリード１ａをこ
の円筒形の一方の端面から２本突出させたものである。
ただし、この発電要素１は、円筒形の側面を押し潰すこ
とにより平型化させている。なお、発電要素１は、この
ような巻回型を押し潰して平型化させたものに限らず、
積層型やその他の任意の形状構成のものを用いることが
できる。また、この発電要素１は、１個の単電池に限ら
ず、複数個を組電池としたものであってもよい。さら
に、リード１ａは、２本に限らず、任意の本数を突出さ
せることができる。In this embodiment, a method of manufacturing a non-aqueous electrolyte secondary battery in which a power generation element is covered with two aluminum laminate sheets and hermetically sealed will be described. The power generating element 1 shown in FIG.
In the same manner as in a normal winding type, the positive and negative electrodes and the separator are wound into a cylindrical shape, and two leads 1a connected to the positive and negative electrodes are projected from one end face of the cylindrical shape.
However, the power generating element 1 is flattened by crushing a cylindrical side surface. In addition, the power generating element 1 is not limited to a flat type obtained by crushing such a wound type.
A laminated type or any other configuration may be used. The power generating element 1 is not limited to one unit cell, but may be a plurality of assembled cells. Further, the number of leads 1a is not limited to two, and any number of leads can be projected.

【００１９】下側のアルミラミネートシート２は、図示
左側のロール等（図示せず）から引き出して長尺なまま
順次供給され、まず所定間隔で凹部２ａがプレス成形さ
れると共に、これらの各凹部２ａ上にそれぞれ発電要素
１を載置し、この上に別のロール３から引き出した上側
のアルミラミネートシート４を重ね合わせる（発電要素
収納工程）。この際、各発電要素１は、２本のリード１
ａの先端部をアルミラミネートシート２，４の手前側の
側辺からそれぞれはみ出させて載置する。The lower aluminum laminated sheet 2 is drawn out from a roll or the like (not shown) on the left side in the figure and supplied sequentially while it is long. First, the concave portions 2a are press-formed at predetermined intervals, and each of these concave portions is formed. Each of the power generating elements 1 is placed on 2a, and the upper aluminum laminate sheet 4 drawn from another roll 3 is overlaid thereon (power generating element storage step). At this time, each power generating element 1 has two leads 1
The leading end of “a” protrudes from the front side of the aluminum laminate sheets 2 and 4 and is placed.

【００２０】次に、図１に示すように、発電要素１の周
囲で重なり合ったアルミラミネートシート２，４（ハッ
チングＡで示した領域）を、高温の金型で上下からプレ
スすることにより加熱圧迫して封口する（第１封口工
程）。ここで、アルミラミネートシート２，４は、いず
れも表面保護層であるＰＥＴ（ポリエチレンテレフタレ
ート）フィルムの互いに向かい合う面に、バリア層であ
るアルミニウム・フィルムと、水分バリア層であるポリ
エチレン・フィルムやポリプロピレン・フィルム等をラ
ミネートしたシートである。そして、これらのアルミラ
ミネートシート２，４を重ね合わせて加熱圧迫すること
により、水分バリア層同士を熱溶着させて封口すること
ができる。また、各発電要素１のリード１ａは、基部付
近を予め金属との接着層を介して電解液バリア層となる
エバール樹脂のフィルムで覆っている。従って、アルミ
ラミネートシート２，４をこのリード１ａと共に重ね合
わせて加熱圧迫すると、水分バリア層と電解液バリア層
が熱溶着して、これらアルミラミネートシート２，４と
リード１ａとの間も確実に封口することができる。Next, as shown in FIG. 1, the aluminum laminated sheets 2 and 4 (areas indicated by hatching A) that overlap each other around the power generating element 1 are heated and compressed by pressing from above and below with a high-temperature mold. And sealing (first sealing step). Here, the aluminum laminate sheets 2 and 4 are formed on a surface of a PET (polyethylene terephthalate) film which is a surface protective layer, on an opposing surface, by an aluminum film which is a barrier layer and a polyethylene film or polypropylene film which is a moisture barrier layer. It is a sheet on which a film or the like is laminated. Then, by laminating these aluminum laminated sheets 2 and 4 and pressing them under heat, the moisture barrier layers can be thermally welded to each other and sealed. In addition, the lead 1a of each power generating element 1 is previously covered with a film of eval resin serving as an electrolyte barrier layer via a bonding layer with a metal in the vicinity of the base. Therefore, when the aluminum laminate sheets 2 and 4 are overlapped with the leads 1a and heated and pressed, the moisture barrier layer and the electrolyte barrier layer are thermally welded to each other, and the gap between the aluminum laminate sheets 2 and 4 and the leads 1a is securely formed. Can be sealed.

【００２１】ただし、この第１封口工程では、ハッチン
グＡで示したように、発電要素１を収納した凹部２ａか
ら図１上方の側辺に至る未封口経路５のアルミラミネー
トシート２，４は溶着させないようにして、この凹部２
ａ内を外部と連通させておく。このような未封口経路５
を形成するには、上下双方又はいずれか一方の金型のプ
レス面に溝を形成し、未封口経路５となる部分のみを加
熱圧迫しないようにすればよい。また、例えばアルミラ
ミネートシート２，４の間にフッ素樹脂やポリイミド等
のように耐熱性があり接着し難い樹脂等からなるパイプ
や薄板状等の溶着阻止部材を挿入してから加熱圧迫して
もよい。アルミラミネートシート２，４の間にパイプが
挿入されると、金型のプレスによりこのパイプは一旦押
し潰された状態にはなるが、アルミラミネートシート
２，４同士の熱溶着は妨げられるので、このパイプの内
孔を広げれば未封口経路５が形成される。アルミラミネ
ートシート２，４の間に溶着阻止部材が挿入された場合
にも、挿入部の熱溶着が同様に妨げられるので、この溶
着阻止部材を引き抜いた跡が未封口経路５となる。However, in the first sealing step, as indicated by hatching A, the aluminum laminate sheets 2 and 4 of the unsealed path 5 extending from the concave portion 2a accommodating the power generating element 1 to the upper side in FIG. Do not allow this recess 2
The inside of a is communicated with the outside. Such an unsealed route 5
In order to form the groove, a groove may be formed on the press surface of both the upper and lower molds or any one of the molds so that only the portion to be the unsealed path 5 is not heated and pressed. Also, for example, even if a heat-pressing member is inserted between the aluminum laminated sheets 2 and 4 after inserting a welding prevention member such as a pipe or a thin plate made of a resin or the like having heat resistance such as fluororesin or polyimide which is difficult to adhere to, etc. Good. When the pipe is inserted between the aluminum laminated sheets 2 and 4, this pipe is once crushed by the pressing of the mold, but the heat welding between the aluminum laminated sheets 2 and 4 is prevented. If the inner hole of the pipe is widened, an unsealed path 5 is formed. Even when the welding prevention member is inserted between the aluminum laminated sheets 2 and 4, the heat welding of the insertion portion is similarly prevented, and the trace of pulling out the welding prevention member becomes the unsealed path 5.

【００２２】第１封口工程が完了すると、封口された凹
部２ａの周囲のアルミラミネートシート２，４をチャン
バ６内に収容する（第１減圧注液工程）。チャンバ６
は、下方のチャンバ本体上にアルミラミネートシート
２，４を挟み込んだ状態で上方から蓋部を被せて内部を
密閉したものである。この際、アルミラミネートシート
２，４には、所定のピッチで適宜位置決め孔を形成して
おき、チャンバ６内の位置決めピンによって正確な位置
決めを行うようにすることができる。このチャンバ６に
は、コールドトラップ７を介して、チャンバ６内を真空
引きするための真空ポンプ８が接続されている。コール
ドトラップ７は、脱気中に混じった非水電解液を除去し
て真空ポンプ８を保護するためのものである。また、こ
のチャンバ６には、非水電解液９を一定量ずつノズル１
０の先端から注液する非水電解液注入装置が設けられて
いる。ところで、チャンバ６内の未封口経路５が、単に
アルミラミネートシート２，４を熱溶着していないだけ
で、実際には開口していない場合には、適宜の手段によ
り開口させる必要がある。例えば未封口経路５の下側の
アルミラミネートシート４に下方から開口ヘッドを真空
吸着させ、この開口ヘッドを下方に押し下げれば、アル
ミラミネートシート４のみが撓んで未封口経路５を開口
させることができる。When the first sealing step is completed, the aluminum laminate sheets 2 and 4 around the sealed recess 2a are housed in the chamber 6 (first reduced pressure injection step). Chamber 6
Is a structure in which the aluminum laminate sheets 2 and 4 are sandwiched on the lower chamber main body, and the inside is sealed by covering the lid from above. At this time, positioning holes are appropriately formed in the aluminum laminate sheets 2 and 4 at a predetermined pitch, and accurate positioning can be performed by the positioning pins in the chamber 6. A vacuum pump 8 for evacuating the chamber 6 is connected to the chamber 6 via a cold trap 7. The cold trap 7 is for removing the non-aqueous electrolyte mixed during the degassing to protect the vacuum pump 8. A nonaqueous electrolytic solution 9 is supplied to the chamber
There is provided a non-aqueous electrolyte injection device for injecting liquid from the front end of the zero. By the way, if the unsealed path 5 in the chamber 6 is not simply opened by simply heat-welding the aluminum laminate sheets 2 and 4, it must be opened by an appropriate means. For example, if the opening head is vacuum-sucked from below to the aluminum laminated sheet 4 below the unsealed path 5 and the opening head is pressed down, only the aluminum laminated sheet 4 is bent to open the unsealed path 5. it can.

【００２３】上記チャンバ６は、非水電解液９を注入す
るためのノズル１０にコールドトラップ７を介して真空
ポンプ８を接続することも可能である。この場合、バル
ブを切り替えることにより、チャンバ６内の真空引きと
非水電解液９の注入とを同じノズル１０を通して行うこ
とになる。しかし、非水電解液９の注入後にノズル１０
にこの非水電解液９の液滴が付着した状態で真空引きを
行うと、溶剤が揮発して塩が管内に付着し、これを繰り
返す間に析出した塩が固まりとなって管路を塞ぐおそれ
が生じる。従って、チャンバ６内の真空引きを行う管路
は、本実施形態のようにノズル１０とは別個に設けるこ
とが好ましい。In the chamber 6, a vacuum pump 8 can be connected via a cold trap 7 to a nozzle 10 for injecting a non-aqueous electrolyte 9. In this case, by switching the valve, the evacuation of the chamber 6 and the injection of the non-aqueous electrolyte 9 are performed through the same nozzle 10. However, after injection of the non-aqueous electrolyte 9, the nozzle 10
When vacuuming is performed with the droplets of the non-aqueous electrolyte 9 adhered to the solvent, the solvent volatilizes and the salt adheres to the inside of the tube, and during this repetition, the precipitated salt solidifies and blocks the conduit. There is a fear. Therefore, it is preferable to provide a pipeline for performing vacuum evacuation in the chamber 6 separately from the nozzle 10 as in the present embodiment.

【００２４】上記第１減圧注液工程では、チャンバ６が
密閉されると、まず真空ポンプ８を動作させてチャンバ
６内を真空引きして減圧する。この際、凹部２ａ内も未
封口経路５を通して減圧されて、発電要素１の内部に含
まれた空気が引き抜かれる。次に、非水電解液注入装置
によって、ノズル１０の先端を未封口経路５内に挿入
し、凹部２ａ内に非水電解液９を一定量だけ注入する。
すると、この非水電解液９は、減圧された凹部２ａ内を
満たして、発電要素１の内部にも速やかに充填される。In the first reduced pressure injection step, when the chamber 6 is sealed, the vacuum pump 8 is first operated to evacuate the chamber 6 to reduce the pressure. At this time, the pressure inside the concave portion 2a is also reduced through the unsealed path 5, and the air contained in the power generating element 1 is drawn out. Next, the tip of the nozzle 10 is inserted into the unsealed passage 5 by a nonaqueous electrolyte injection device, and a predetermined amount of the nonaqueous electrolyte 9 is injected into the concave portion 2a.
Then, the non-aqueous electrolytic solution 9 fills the depressurized concave portion 2a and quickly fills the inside of the power generating element 1.

【００２５】上記第１減圧注液工程による非水電解液９
の注入が完了すると、チャンバ６を開いてアルミラミネ
ートシート２，４を移送し、これらのアルミラミネート
シート２，４の手前側の側辺から突出するリード１ａに
充電器１１を接続し予備充電を行う（予備充電工程）。
充電器１１は、アルミラミネートシート２，４に同期し
て移送されるベルトコンベア上にリード１ａとの接続端
子を設けてあり、このリード１ａを通じて発電要素１の
定電圧又は定電流による充電を行うものである。予備充
電は、発電要素１の極板間からガスを発生させるため
に、非水電解液９の注入後に最初に行う充電であり、電
池容量の１５％程度まで充電すれば足りる。The non-aqueous electrolyte 9 in the first vacuum injection step
Is completed, the chamber 6 is opened, the aluminum laminated sheets 2 and 4 are transferred, and the charger 11 is connected to the lead 1a protruding from the front side of the aluminum laminated sheets 2 and 4 to perform preliminary charging. Perform (preliminary charging step).
The charger 11 is provided with a connection terminal with a lead 1a on a belt conveyor transferred in synchronization with the aluminum laminated sheets 2 and 4, and charges the power generating element 1 with a constant voltage or a constant current through the lead 1a. Things. The pre-charging is the first charging performed after the injection of the non-aqueous electrolyte 9 in order to generate gas from between the electrodes of the power generating element 1, and it is sufficient to charge the battery to about 15% of the battery capacity.

【００２６】上記予備充電工程が完了すると、アルミラ
ミネートシート２，４を再度チャンバ６内に収容する
（第２減圧注液工程）。このチャンバ６は、第１減圧注
液工程で使用したものと同様の構成のものでよい。そし
て、この第２減圧注液工程でチャンバ６が密閉された場
合にも、まず真空ポンプ８で真空引きを行う。すると、
凹部２ａ内が未封口経路５を通して減圧されて、発電要
素１の電極間からガスが確実に引き抜かれる。次に、非
水電解液注入装置によって、ノズル１０の先端を未封口
経路５内に挿入し、凹部２ａ内に非水電解液９を一定量
だけ注入する。ここでの非水電解液９の注入は、予備充
電を行うことにより不足した分を補充するためのもので
あり、この不足分の補充が不要であれば省略してもよ
い。When the pre-charging step is completed, the aluminum laminate sheets 2 and 4 are stored again in the chamber 6 (second pressure-reducing liquid injection step). The chamber 6 may have the same configuration as that used in the first reduced pressure injection step. Then, even when the chamber 6 is sealed in the second reduced pressure injection step, first, the vacuum pump 8 is evacuated. Then
The inside of the concave portion 2 a is depressurized through the unsealed path 5, and the gas is reliably extracted from between the electrodes of the power generating element 1. Next, the tip of the nozzle 10 is inserted into the unsealed passage 5 by a nonaqueous electrolyte injection device, and a predetermined amount of the nonaqueous electrolyte 9 is injected into the concave portion 2a. The injection of the nonaqueous electrolytic solution 9 is for replenishing the shortage by performing the pre-charging, and may be omitted if the replenishment of the shortage is unnecessary.

【００２７】上記第２減圧注液工程が完了すると、チャ
ンバ６を開いてアルミラミネートシート２，４を移送
し、未封口経路５の付近（ハッチングＢで示した領域）
を、高温の金型で上下からプレスすることにより加熱圧
迫して封口する（第２封口工程）。すると、未封口経路
５で重なり合ったまま未封口であったアルミラミネート
シート２，４が溶着して封口され、発電要素１を収納し
た凹部２ａ内が完全に密封されるので、この長尺なアル
ミラミネートシート２，４に所定間隔ごとに電池が多数
形成されることになる。When the second vacuum injection step is completed, the chamber 6 is opened and the aluminum laminate sheets 2 and 4 are transferred to the vicinity of the unsealed path 5 (area indicated by hatching B).
Is heated and pressed by a high-temperature mold from above and below to seal (second sealing step). Then, the unsealed aluminum laminate sheets 2 and 4, which overlap with each other in the unsealed path 5, are welded and sealed, and the inside of the recess 2 a containing the power generation element 1 is completely sealed. A large number of batteries are formed on the laminated sheets 2 and 4 at predetermined intervals.

【００２８】以上説明した本実施形態の非水電解質二次
電池の製造方法によれば、重なり合った長尺なアルミラ
ミネートシート２，４の間に発電要素１を所定間隔で多
数収納して、これら各発電要素１を収納した凹部２ａの
周囲を封口すると共に、この凹部２ａ内を真空引きした
り、この凹部２ａ内に非水電解液９を注入し予備充電を
行うので、多数の電池を連続的に製造し容易に搬送する
ことができるようになる。According to the method for manufacturing a non-aqueous electrolyte secondary battery of the present embodiment described above, a large number of power generating elements 1 are housed at a predetermined interval between the long aluminum laminated sheets 2 and 4 that overlap each other. Since the periphery of the concave portion 2a accommodating each power generating element 1 is sealed and the inside of the concave portion 2a is evacuated, or the non-aqueous electrolyte 9 is injected into the concave portion 2a to perform preliminary charging, a large number of batteries can be continuously connected. It can be manufactured and transported easily.

【００２９】なお、上記実施形態では、２枚のアルミラ
ミネートシート２，４を重ね合わせて封口する場合につ
いて説明したが、１枚の幅広のアルミラミネートシート
２の他方の側辺部を折り返して重ね合わせるようにする
こともできる。また、上記実施形態では、下側のアルミ
ラミネートシート２に発電要素１を収納するための凹部
２ａを成形したが、このような凹部２ａの形成の有無は
任意である。In the above embodiment, the case where the two aluminum laminated sheets 2 and 4 are overlapped and sealed is described. However, the other side of one wide aluminum laminated sheet 2 is folded back and overlapped. They can be matched. Further, in the above embodiment, the concave portion 2a for accommodating the power generation element 1 is formed in the lower aluminum laminate sheet 2, but the presence or absence of the formation of such a concave portion 2a is arbitrary.

【００３０】さらに、上記実施形態では、アルミラミネ
ートシート２，４を用いたが、バリア性があるシートで
あれば、別の種類のラミネートシートやその他の樹脂シ
ート等を用いることもできる。また、上記実施形態で
は、アルミラミネートシート２，４を加熱圧迫して熱溶
着させる場合について説明したが、シートを封口する手
段は、このような熱溶着による場合に限らず任意であ
る。Further, in the above embodiment, the aluminum laminated sheets 2 and 4 are used, but other types of laminated sheets or other resin sheets may be used as long as they have a barrier property. Further, in the above-described embodiment, the case where the aluminum laminated sheets 2 and 4 are heat-pressed and heat-welded is described. However, the means for sealing the sheets is not limited to such heat-sealing and is arbitrary.

【００３１】さらに、上記実施形態では、各発電要素１
のリード１ａの先端部をアルミラミネートシート２，４
の間からはみ出させて封口したが、これらのリード１ａ
を先端部も含めてアルミラミネートシート２，４で完全
に覆うようにしてもよい。この場合、各リード１ａを完
全に覆って封口すると、これらのリード１ａに充電器１
１を接続する際に、アルミラミネートシート２，４の一
部を剥がす必要が生じる。ただし、アルミラミネートシ
ート２，４に予め開口窓を設けてリード１ａの一部を露
出させるようにしておけば、接続の際にアルミラミネー
トシート２，４を剥がす必要はなくなる。また、各リー
ド１ａをアルミラミネートシート２，４で完全に覆う
が、これら各リード１ａの先端部付近は熱溶着による封
口を行わないようにした場合には、このアルミラミネー
トシート２，４をめくるだけで充電器１１の接続を行う
ことができるようになる。Further, in the above embodiment, each power generating element 1
Of the lead 1a of the aluminum laminate sheet 2, 4
The lead 1a
May be completely covered with the aluminum laminate sheets 2 and 4 including the tip. In this case, when each lead 1a is completely covered and sealed, the charger 1 is connected to these leads 1a.
When connecting 1, the aluminum laminate sheets 2 and 4 need to be partially peeled off. However, if the aluminum laminated sheets 2 and 4 are provided with opening windows in advance to expose a part of the leads 1a, it is not necessary to peel off the aluminum laminated sheets 2 and 4 at the time of connection. The leads 1a are completely covered with the aluminum laminated sheets 2 and 4. However, if the vicinity of the tip of each of the leads 1a is not sealed by heat welding, the aluminum laminated sheets 2 and 4 are turned. The connection of the charger 11 can be performed only by the above.

【００３２】[0032]

【発明の効果】以上の説明から明らかなように、本発明
の非水電解質二次電池の製造方法によれば、重なり合っ
た長尺なシートの間に発電要素を所定間隔で多数収納し
て、これら各発電要素の収納部の周囲を封口すると共
に、この収納部内を真空引きしたり、この収納部内に非
水電解液を注入し予備充電を行うことができるので、こ
の長尺なシート上に連続的に電池を形成し搬送すること
ができるようになり、電池の生産性を高めることができ
る。As is apparent from the above description, according to the method of manufacturing a non-aqueous electrolyte secondary battery of the present invention, a large number of power generating elements are stored at a predetermined interval between overlapping long sheets. It is possible to close the periphery of the storage section of each of these power generating elements, evacuate the storage section, or inject a non-aqueous electrolyte into the storage section to perform preliminary charging. The battery can be formed and transported continuously, and the productivity of the battery can be increased.

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

【図１】本発明の一実施形態を示すものであって、電池
の製造工程を示す正面図である。FIG. 1, showing an embodiment of the present invention, is a front view illustrating a manufacturing process of a battery.

【図２】本発明の一実施形態を示すものであって、電池
の製造工程における発電要素収納工程の詳細を示す斜視
図である。FIG. 2, showing an embodiment of the present invention, is a perspective view illustrating details of a power generation element housing process in a battery manufacturing process.

【符号の説明】[Explanation of symbols]

１ 発電要素 １ａ リード ２ アルミラミネートシート ４ アルミラミネートシート ５ 未封口経路 ８ 真空ポンプ ９ 非水電解液 １１ 充電器 DESCRIPTION OF SYMBOLS 1 Power generation element 1a Lead 2 Aluminum laminated sheet 4 Aluminum laminated sheet 5 Unsealed path 8 Vacuum pump 9 Non-aqueous electrolyte 11 Charger

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 ２枚の長尺なシートを重ね合わせた間
に、又は、１枚の長尺なシートの一方の側辺部を折り返
して重ね合わせた間に、所定間隔で発電要素を収納する
工程と、 重ね合わせたシートにおける各発電要素の収納部の周囲
を、この収納部からシートの側辺に至る適宜の未封口経
路を除いて、これらのシートの間に挟持された発電要素
のリードの全部又は一部と共に封口する工程と、 封口したシートの間における各発電要素の収納部内を未
封口経路を通じて真空引きし減圧する工程と、 減圧した各発電要素の収納部内に未封口経路を通して非
水電解液を注入する工程と、 収納部に非水電解液を満たした各発電要素をこの発電要
素のリードを通じて予備充電する工程と、 予備充電した各発電要素の収納部内を未封口経路を通じ
て再度真空引きし減圧する工程と、 未封口経路で重なり合うシートを封口する工程とを備え
たことを特徴とする非水電解質二次電池の製造方法。1. A power generation element is stored at a predetermined interval while two long sheets are overlapped or one long sheet is folded back and overlapped. And the surroundings of the storage section of each power generation element in the superposed sheets, except for an appropriate unsealed path from this storage section to the side of the sheet, of the power generation element sandwiched between these sheets. A step of sealing with all or a part of the leads; a step of evacuating and depressurizing the inside of the storage section of each power generating element between the sealed sheets through an unsealed path; A step of injecting the non-aqueous electrolyte, a step of pre-charging each power generation element filled with the non-aqueous electrolyte in the storage section through a lead of the power generation element, and a step of opening the inside of the storage section of each pre-charged power generation element through an unsealed path. True again Pulling and a step of depressurizing method of the nonaqueous electrolyte secondary battery characterized by comprising the step of sealing the sheets overlapping in the non-sealing path. 【請求項２】 前記未封口経路で重なり合うシートを封
口する工程の前に、再度の真空引きにより減圧した各発
電要素の収納部内に未封口経路を通して非水電解液の不
足分を注入する工程を挿入したことを特徴とする請求項
１に記載の非水電解質二次電池の製造方法。2. A step of injecting a shortage of the non-aqueous electrolyte through the unsealed passage into the storage section of each power generating element which has been depressurized again by evacuation before the step of sealing the sheets which overlap each other in the unsealed passage. The method for manufacturing a non-aqueous electrolyte secondary battery according to claim 1, wherein the battery is inserted. 【請求項３】 前記発電要素の収納部内に未封口経路を
通して非水電解液を注入する管路と、発電要素の収納部
内を未封口経路を通じて真空引きする管路とを別系統の
ものにしたことを特徴とする請求項１又は請求項２に記
載の非水電解質二次電池の製造方法。3. A separate line for injecting the non-aqueous electrolyte into the housing of the power generating element through an unsealed channel, and a line for evacuating the housing of the power generating element through the unsealed channel. The method for producing a non-aqueous electrolyte secondary battery according to claim 1 or 2, wherein:
JP06808797A 1997-03-21 1997-03-21 Method for producing non-aqueous electrolyte secondary battery Expired - Lifetime JP3787942B2 (en)

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