JPS61179059A - Manufacture of flat cell - Google Patents

Manufacture of flat cell

Info

Publication number
JPS61179059A
JPS61179059A JP60018251A JP1825185A JPS61179059A JP S61179059 A JPS61179059 A JP S61179059A JP 60018251 A JP60018251 A JP 60018251A JP 1825185 A JP1825185 A JP 1825185A JP S61179059 A JPS61179059 A JP S61179059A
Authority
JP
Japan
Prior art keywords
heated
sealing process
sealing
pressured
film
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
Application number
JP60018251A
Other languages
Japanese (ja)
Inventor
Yutaka Hashimoto
裕 橋本
Hiroharu Fukuda
福田　弘治
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP60018251A priority Critical patent/JPS61179059A/en
Publication of JPS61179059A publication Critical patent/JPS61179059A/en
Pending 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
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/04—Cells with aqueous electrolyte
    • H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
    • H01M6/12—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with flat electrodes
    • 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
    • H01M50/555—Window-shaped terminals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

PURPOSE:To prevent a melting away of an outer formation, by forming areas of the secondary process apart to the inside from the areas of the primary sealing process, when the outside of the outer formation covering generating elements is heated and welded to seal up. CONSTITUTION:Generating elements, consisting of a negative electrode 15, a positive electrode 19, a separator 18, and current collectors 14 and 17, are placed on a layer 22 of a polyester nonwoven fabric 12 and a polyethylene film 11, covered with an outer formation 2 formed of an aluminum foil 10 and a polyester film 9, and then closed up tightly to make a flat cell. In this case, the side brims 4 and 5 are heated and pressured, then an electrolyte is poured, and the brim 6-1 of the opening is heated and pressured at a low pressure, in the primary sealing process. After that, the portions 7, apart to the inside from the areas 4, 5, and 6-1, are heated and pressured in the secondary sealing process, and then sealed up. Therefore, any portion of the outer formation 2 is never melted away despite its thin formation, improving its anti-leakage property.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、扁平電池の製造法の改良に関するものでるる
。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement in a method for manufacturing flat batteries.

従来の技術 第一図は、これまでの代表的な扁平電池１の拡大部分断
面図である。この電池は非水電解液を含有したセパレー
タ１８を介して、板状のリチウム負極１６と、弗化炭素
を成形した正極活物質１９とを対向させ、これらの両活
物質にそれぞれ、負極集電体１４、正極集電体１７を電
気的に当接しこの集電体１４．１７間には絶縁体１６″
ｔ６介在させている。これらの構成要素は、次のような
積層状構造を有するフィルム状外装体２により被覆され
ている。フィルム状外装体２は、ポリエステル不織布１
２を両側から挾持するポリエチレンフィルム１１よりな
るポリエチレンラミネート層２２と、このポリエチレン
ラミネートｌ１ｉｉ２２の片側にアルミニウム箔１ｏを
配し、δらにその外側にポリエステルフィルム９を配し
たマルチラミネートである。このフィルム状外装体２に
は、負極用端子孔１３と、図示していないが正極用端子
孔が穿設されている。このフィルム状外装体２周縁の重
ね合わせ部分２ｏが熱溶着されて扁平電池が作られてい
る。この扁平電池の外周部の封止は、定められた封口領
域について、一定の温度と圧力を加える封口工程により
溶着封口される。この封口法について、第２図により詳
細に説明する。１は扁平電池、２はフィルム状外装体、
３は封目前の扁平電池をその中央部より、長さ方向に２
つに折り曲げた折曲部分を示す。第１の工程（第１次封
口工程）でまず４．６で示す長手方向に沿った縁部の斜
線部分６を、加熱加圧により溶着密封する。BACKGROUND OF THE INVENTION FIG. 1 is an enlarged partial cross-sectional view of a typical flat battery 1 of the prior art. In this battery, a plate-shaped lithium negative electrode 16 and a positive electrode active material 19 made of molded carbon fluoride are placed facing each other with a separator 18 containing a non-aqueous electrolyte interposed therebetween, and negative electrode current collectors are respectively applied to both active materials. The body 14 and the positive electrode current collector 17 are in electrical contact with each other, and an insulator 16'' is placed between the current collectors 14 and 17.
t6 is interposed. These components are covered with a film-like exterior body 2 having the following laminated structure. The film-like exterior body 2 is made of polyester nonwoven fabric 1
This is a multi-laminate comprising a polyethylene laminate layer 22 made of polyethylene film 11 sandwiching 2 from both sides, aluminum foil 1o arranged on one side of this polyethylene laminate 11ii22, and polyester film 9 arranged on the outside of δ. This film-like exterior body 2 is provided with a negative electrode terminal hole 13 and a positive electrode terminal hole (not shown). The overlapping portion 2o of the periphery of this film-like exterior body 2 is thermally welded to form a flat battery. The outer periphery of this flat battery is sealed by welding in a sealing process that applies constant temperature and pressure to a predetermined sealing area. This sealing method will be explained in detail with reference to FIG. 1 is a flat battery, 2 is a film-like exterior body,
3 is an unsealed flat battery, starting from the center and extending 2 times in the length direction.
The bent part is shown. In the first step (first sealing step), first, the hatched portion 6 of the longitudinal edge shown in 4.6 is welded and sealed by heating and pressurizing.

第２の工程で、図示していないが、８の矢印で示す開口
部分より、非水電解液を注入し、第３の工程で、開口部
分を形成する側縁部６−１の斜線部分を、減圧下で第１
の工程と同じ方法で溶着密封する。第４工程（第２次封
口工程）では斜線４．５．６−１の三辺上に実線７で示
す形状に再度加熱加圧し溶着密封する。In the second step, although not shown, a non-aqueous electrolyte is injected through the opening indicated by the arrow 8, and in the third step, the diagonal lined portion of the side edge 6-1 forming the opening is injected. , the first under reduced pressure
Weld and seal using the same method as in step . In the fourth step (second sealing step), the shape shown by the solid line 7 on the three sides indicated by the diagonal lines 4,5,6-1 is heated and pressurized again to seal by welding.

発明が解決しようとする問題点 しかしこのように第４工程（第２次封口工程）で、第１
、第３工程により既に加熱加圧した溶着密封部分を、更
に実線７で示すように線状に加熱加圧するために、第１
、第３工程の加熱加圧で薄くなっている部分がさらに薄
くなる。そして引張り力が作用する第３図の２１部分の
ポリエチレン１１とポリエステル不織布１２により、形
成され念ポリエチレンラミネート層２２が溶断され、溶
断部分より非水電解液が浸出してアルミニウム箔１ｏと
接触することにより、非水電解液を導電媒体として、内
部短絡を生じることにより、１５〜７５チの電圧不良が
発生していた。Problems to be Solved by the Invention However, in the fourth step (second sealing step), the first
, in order to further heat and pressurize the welded and sealed portion that has already been heated and pressurized in the third step in a linear manner as shown by the solid line 7, the first step is performed.
, the portion that has become thinner due to heating and pressurization in the third step becomes even thinner. Then, the polyethylene laminate layer 22 formed by the polyethylene 11 and the polyester nonwoven fabric 12 in the section 21 in FIG. By using the nonaqueous electrolyte as a conductive medium, internal short circuits occur, resulting in voltage failures of 15 to 75 inches.

本発明は上述したように、扁平電池の封口工程において
、溶着密封するための第１次封口の加熱加圧領域部分に
、再度線状に加熱加圧する第２次封口工程を施すとポリ
エチレンラミネート層を溶断し、アルミニウム箔に非水
電解液が浸出する原因となることを解決したものであり
、内部短絡を生じない方法を提供することを目的とする
。As described above, in the sealing process of a flat battery, the present invention provides a polyethylene laminate layer by performing a second sealing process in which heating and pressurizing the area of the primary sealing area for welding and sealing the battery in a linear manner again. The purpose is to solve the problem of non-aqueous electrolyte leaking into aluminum foil by fusing it, and to provide a method that does not cause internal short circuits.

問題点を解決するための手段 本発明は扁平電池を封口する際の加熱加圧工程として、
加熱加圧工程を同一領域に再度繰り返えして実施しない
ように相互に分離するものである。Means for Solving the Problems The present invention provides a heating and pressurizing step when sealing a flat battery.
They are separated from each other so that the heating and pressurizing process is not repeated over the same area.

すなわち、第１次封口工程と、第２次封口工程とにより
形成される溶着密封領域において、第２次封口工程によ
る溶着密封領域が第１次封口工程による溶着密封領域の
内側方向に分離して形成されるようにしたものである。That is, in the welded and sealed area formed by the first sealing process and the second sealing process, the welded and sealed area by the second sealing process is separated inward from the welded and sealed area by the first sealing process. It is designed to be formed.

作用 このような第１次、第２次の２工程からなる封口工程で
の加熱加圧工程を同じ封口領域部分に重ならないよう避
けて行なうことにより、フィルム状外装体を構成するポ
リエチレンラミネート層の溶断を防止することができる
。Function: By performing the heating and pressurizing process in the sealing process consisting of the first and second steps so as not to overlap the same sealing area, the polyethylene laminate layer constituting the film-like exterior body can be heated and pressed. Melting can be prevented.

実施例 以下本発明に係る扁平電池の製造法における封口法につ
いて、第１図により詳細に説明する。尚第２図による従
来の封口工程と重複する部分の説明は省略する。EXAMPLES Below, the sealing method in the method of manufacturing a flat battery according to the present invention will be explained in detail with reference to FIG. Note that explanations of parts that overlap with the conventional sealing process shown in FIG. 2 will be omitted.

まず第１次の封口工程で長手方向に沿った側縁４．６を
加熱加圧する。ついで第２工程でフィルム状外装体の開
口部から非水電解液を注入し、開口部分を形成する側縁
部６−１の斜線部分を減圧下で、力ロ熱加圧して溶着密
封した第３工程後、斜線で示す４．６．６−１の各々の
加熱加圧封口領域部分より内側方向で離れた個所に、第
４工程（第２次封口工程）により最終封口のために線状
の加熱加圧封口領域７を形成することにより、扁平な発
電要素を被覆するフィルム状外装体の開口部の溶着密封
を完了する。First, in the first sealing step, the side edges 4.6 along the longitudinal direction are heated and pressurized. Then, in a second step, a non-aqueous electrolyte is injected through the opening of the film-like exterior body, and the diagonally shaded part of the side edge 6-1 forming the opening is heated under reduced pressure and welded and sealed. After the 3rd step, a linear shape is applied in the 4th step (secondary sealing step) for final sealing at a location that is inwardly away from the heating and pressurizing sealing area of each of 4.6.6-1 indicated by diagonal lines. By forming the heating and pressurizing sealing region 7, welding and sealing of the opening of the film-like exterior covering the flat power generation element is completed.

発明の効果 このようにフィルム状外装体の外周重ね合わせ部分を、
相互に分離さｔＮた密封封口領域で溶着密封することに
より、ポリエチレンラミネート層の溶断をなくシ、アル
ミニウム箔の非水電解液との接触を阻止できる結果、扁
平電池内での内部短絡による電圧不良を防ぐことができ
る。Effects of the invention In this way, the overlapping portion of the outer periphery of the film-like exterior body,
By welding and sealing the sealed areas separated from each other, the polyethylene laminate layer can be prevented from fusing and the aluminum foil can be prevented from coming into contact with the non-aqueous electrolyte, thereby preventing voltage failures due to internal short circuits within the flat battery. can be prevented.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に係る製造法で密封した扁平電池の正面
図、第２図は従来の封口法で密封した扁平電池の正面図
、第３図は扁平電池の要部拡大断面図である。 ６・・・・・・第１次封口工程による密封領域、６−１
・・・・・・第２次封口工程による密封領域、１ｏ・・
・・・・アルミニウム箔、１１・・・・・・ポリエチレ
ンフィルム、１２・・・・・・ポリエステル不織布、２
２・・・・・・ポリエチレンラミネートＮ、ＪFig. 1 is a front view of a flat battery sealed by the manufacturing method according to the present invention, Fig. 2 is a front view of a flat battery sealed by the conventional sealing method, and Fig. 3 is an enlarged sectional view of the main parts of the flat battery. . 6... Sealed area by first sealing step, 6-1
...Sealed area by second sealing process, 1o...
... Aluminum foil, 11 ... Polyethylene film, 12 ... Polyester nonwoven fabric, 2
2...Polyethylene laminate N, J

Claims (1)

【特許請求の範囲】[Claims] （１）軽金属を活物質とする負極と、正極と、非水電解
液とからなる扁平な発電要素をフィルム状外装体で密封
外装する電池の製造法であって、発電要素を包被するフ
ィルム状外装体の外周を加熱溶着する封口工程に際して
第１次の封口工程による密封領域とは分離して、第２次
の封口工程で密封領域を形成することを特徴とする扁平
電池の製造法。(1) A method for producing a battery in which a flat power generation element consisting of a negative electrode using a light metal as an active material, a positive electrode, and a non-aqueous electrolyte is hermetically packaged with a film-like exterior body, the film enveloping the power generation element. A method for manufacturing a flat battery, which comprises forming a sealed area in a second sealing process, which is separated from a sealing area in a first sealing process during a sealing process in which the outer periphery of a shaped exterior body is heat-welded.
JP60018251A 1985-02-01 1985-02-01 Manufacture of flat cell Pending JPS61179059A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60018251A JPS61179059A (en) 1985-02-01 1985-02-01 Manufacture of flat cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60018251A JPS61179059A (en) 1985-02-01 1985-02-01 Manufacture of flat cell

Publications (1)

Publication Number Publication Date
JPS61179059A true JPS61179059A (en) 1986-08-11

Family

ID=11966460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60018251A Pending JPS61179059A (en) 1985-02-01 1985-02-01 Manufacture of flat cell

Country Status (1)

Country Link
JP (1) JPS61179059A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102208673A (en) * 2010-03-30 2011-10-05 三星Sdi株式会社 Pouch type secondary battery and the fabrication method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247110A (en) * 1988-06-30 1990-02-16 Basf Ag Method for preparing an ion-bridged ethylene copolymer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247110A (en) * 1988-06-30 1990-02-16 Basf Ag Method for preparing an ion-bridged ethylene copolymer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102208673A (en) * 2010-03-30 2011-10-05 三星Sdi株式会社 Pouch type secondary battery and the fabrication method thereof
JP2011210707A (en) * 2010-03-30 2011-10-20 Samsung Sdi Co Ltd Pouch type secondary battery, and the fabrication method thereof
US8771866B2 (en) 2010-03-30 2014-07-08 Samsung Sdi Co., Ltd. Pouch type secondary battery and the fabrication method thereof

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