JP2002110246A - Method of producing thin battery - Google Patents
Method of producing thin batteryInfo
- Publication number
- JP2002110246A JP2002110246A JP2000301506A JP2000301506A JP2002110246A JP 2002110246 A JP2002110246 A JP 2002110246A JP 2000301506 A JP2000301506 A JP 2000301506A JP 2000301506 A JP2000301506 A JP 2000301506A JP 2002110246 A JP2002110246 A JP 2002110246A
- Authority
- JP
- Japan
- Prior art keywords
- film material
- aqueous electrolyte
- exterior film
- electrode group
- thin battery
- 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
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 65
- 239000011255 nonaqueous electrolyte Substances 0.000 claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000009835 boiling Methods 0.000 claims abstract description 18
- 239000003125 aqueous solvent Substances 0.000 claims abstract description 11
- 230000004888 barrier function Effects 0.000 claims abstract description 9
- 238000005470 impregnation Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 7
- 230000006837 decompression Effects 0.000 claims description 5
- 239000002650 laminated plastic Substances 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 239000011888 foil Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000000565 sealant Substances 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- 239000011149 active material Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 229920006284 nylon film Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 2
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
- KZVBBTZJMSWGTK-UHFFFAOYSA-N 1-[2-(2-butoxyethoxy)ethoxy]butane Chemical compound CCCCOCCOCCOCCCC KZVBBTZJMSWGTK-UHFFFAOYSA-N 0.000 description 1
- JRRDISHSXWGFRF-UHFFFAOYSA-N 1-[2-(2-ethoxyethoxy)ethoxy]-2-methoxyethane Chemical compound CCOCCOCCOCCOC JRRDISHSXWGFRF-UHFFFAOYSA-N 0.000 description 1
- PPDFQRAASCRJAH-UHFFFAOYSA-N 2-methylthiolane 1,1-dioxide Chemical compound CC1CCCS1(=O)=O PPDFQRAASCRJAH-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910015645 LiMn Inorganic materials 0.000 description 1
- 229910014689 LiMnO Inorganic materials 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229930188620 butyrolactone Natural products 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 150000001786 chalcogen compounds Chemical class 0.000 description 1
- 150000001869 cobalt compounds Chemical class 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- MCVFFRWZNYZUIJ-UHFFFAOYSA-M lithium;trifluoromethanesulfonate Chemical compound [Li+].[O-]S(=O)(=O)C(F)(F)F MCVFFRWZNYZUIJ-UHFFFAOYSA-M 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011302 mesophase pitch Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- YTBWYQYUOZHUKJ-UHFFFAOYSA-N oxocobalt;oxonickel Chemical compound [Co]=O.[Ni]=O YTBWYQYUOZHUKJ-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- CFJRPNFOLVDFMJ-UHFFFAOYSA-N titanium disulfide Chemical compound S=[Ti]=S CFJRPNFOLVDFMJ-UHFFFAOYSA-N 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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
Landscapes
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、薄型電池の製造方
法に関する。The present invention relates to a method for manufacturing a thin battery.
【０００２】[0002]
【従来の技術】近年、非水系二次電池、特にリチウムイ
オン二次電池は高電圧、高エネルギー密度を有すること
から一体型ビデオカメラ、移動通信機、ノートブック型
パソコン等のコードレスの携帯型電子機器の電源として
注目されている。とりわけ、角型二次電池の需要が伸び
ており、小型・軽量化への要求が進むに伴って電池の厚
さを薄くすることが要望されている。このような要求に
対し、小型・軽量化かつ薄型の電池の開発が盛んに行な
われている。中でも、アルミニウム箔のようなガスバリ
アフィルムを中間に挟んだプラスチックラミネートフィ
ルムを外装フィルム素材として用いる例えばポリマー電
池の研究が注目されている。2. Description of the Related Art In recent years, non-aqueous secondary batteries, particularly lithium ion secondary batteries, have a high voltage and a high energy density. Therefore, cordless portable electronic devices such as integrated video cameras, mobile communication devices, and notebook personal computers have been developed. It is drawing attention as a power source for equipment. In particular, the demand for prismatic secondary batteries is growing, and with the demand for smaller and lighter batteries, there is a demand to reduce the thickness of the batteries. In response to such demands, small, lightweight and thin batteries have been actively developed. Above all, attention has been focused on, for example, a polymer battery using a plastic laminate film having a gas barrier film such as an aluminum foil sandwiched therebetween as an exterior film material.
【０００３】ところで、従来の薄型電池は低沸点系の非
水溶媒を含む非水電解液を使用する場合、次のような方
法により製造されている。正極および負極をセパレータ
を挟んで捲回もしくは積層した電極群を中間にガスバリ
アフィルムを介在させたプラスチックラミネートフィル
ムからなる外装フィルム素材により包囲し、前記外装フ
ィルム素材を前記電極群の形状に合せて熱シールし、減
圧状態の下で非水電解液を前記外装フィルム素材に注入
した後、大気状態に戻すことにより、前記非水電解液を
前記電極群に含浸させる。Incidentally, a conventional thin battery is manufactured by the following method when a non-aqueous electrolyte containing a non-aqueous solvent having a low boiling point is used. An electrode group in which a positive electrode and a negative electrode are wound or laminated with a separator interposed therebetween is surrounded by an exterior film material made of a plastic laminate film with a gas barrier film interposed therebetween, and the exterior film material is heated according to the shape of the electrode group. After sealing and injecting the non-aqueous electrolyte into the exterior film material under reduced pressure, the electrode group is impregnated with the non-aqueous electrolyte by returning to the atmospheric state.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前述し
た従来の方法では装置が大掛りで複雑になるばかりか、
非水電解液の電極群への含浸量がばらつくという問題が
あった。However, in the above-mentioned conventional method, not only is the apparatus large and complicated,
There has been a problem that the impregnation amount of the non-aqueous electrolyte into the electrode group varies.
【０００５】本発明は、高沸点（沸点２００℃以上）の
非水溶媒を含む非水電解液を用い、簡易な製造ラインで
前記非水電解液を外装フィルム素材内の電極群に均一に
含浸することが可能な薄型電池の製造方法を提供しよう
とするものである。The present invention uses a non-aqueous electrolyte containing a non-aqueous solvent having a high boiling point (boiling point of 200 ° C. or higher), and impregnates the non-aqueous electrolyte uniformly into a group of electrodes in an exterior film material by a simple production line. It is an object of the present invention to provide a method of manufacturing a thin battery capable of performing the above.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
の本発明に係る薄型電池は、正極および負極をセパレー
タを挟んで捲回もしくは積層した電極群を中間にガスバ
リアフィルムを介在させたプラスチックラミネートフィ
ルムからなる外装フィルム素材に収納すると共に、その
外装フィルム素材の一端を開口する工程と、高沸点系の
非水溶媒を含む非水電解液を前記外装フィルム素材にそ
の開口部を通して大気圧下で注入する工程と、前記外装
フィルム素材を減圧雰囲気下に置いて、前記外装フィル
ム素材内の前記電極群に前記非水電解液を含浸する工程
とを具備したことを特徴とするものである。A thin battery according to the present invention for achieving the above object is a plastic laminate in which a gas barrier film is interposed between an electrode group in which a positive electrode and a negative electrode are wound or laminated with a separator interposed therebetween. A step of opening one end of the exterior film material while storing it in the exterior film material made of a film, and applying a non-aqueous electrolyte containing a high-boiling nonaqueous solvent to the exterior film material under atmospheric pressure through the opening. A step of injecting, and a step of impregnating the non-aqueous electrolyte into the electrode group in the exterior film material by placing the exterior film material under a reduced pressure atmosphere.
【０００７】本発明に係る薄型電池の製造方法におい
て、前記含浸工程における最高到達減圧度を１００Ｔｏ
ｒｒ以下にすることが好ましい。In the method of manufacturing a thin battery according to the present invention, the maximum attained decompression degree in the impregnation step is 100 To
It is preferable to set it to rr or less.
【０００８】本発明に係る薄型電池の製造方法におい
て、前記含浸工程を減圧度をステップ状に高くすること
により行なうことが好ましい。In the method for manufacturing a thin battery according to the present invention, it is preferable that the impregnation step is performed by increasing the degree of pressure reduction stepwise.
【０００９】本発明に係る薄型電池の製造方法におい
て、前記含浸工程後に前記外装フィルム素材の開口部を
熱シールする際、減圧下で行なって前記電極群および非
水電解液を外装フィルム内に密閉すること許容する。In the method of manufacturing a thin battery according to the present invention, when the opening of the exterior film material is heat-sealed after the impregnation step, the electrode group and the non-aqueous electrolyte are hermetically sealed in the exterior film. Tolerate.
【００１０】[0010]
【発明の実施の形態】以下、本発明に係る薄型電池の製
造方法図１〜図６を参照して詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing a thin battery according to the present invention will be described in detail with reference to FIGS.
【００１１】（第１工程）まず、正極、セパレータ、負
極およびセパレータを渦巻き状に捲回してほぼ円筒状に
した後、例えば室温で加圧成形することにより図１およ
び図２に示すように正極１、セパレータ２、負極３およ
びセパレータ２を渦巻き状に捲回され、扁平で矩形状を
なす電極群４を作製する。なお、前記捲回に先立って正
負極１，３に外部端子５，６をそれぞれ例えば超音波溶
接により接続する。つづいて、二つ折りのカップ型外装
フィルム素材を用意し、この外装フィルム素材７のカッ
プ８内に前記扁平状の電極群４をその外部端子５，６の
反対側の面が前記外装フィルム素材の折り曲げ部側に位
置するように収納する。前記外装フィルム素材７は、内
面側に位置するシーラントフィルム、例えばアルミニウ
ム箔のようなガスバリアフィルムおよび剛性を有する有
機樹脂フィルムをこの順序で積層した構造を有する。ひ
きつづき、前記電極群４の長辺に対応する前記外装フィ
ルム素材７の左端部および前記外部端子５，６の延出側
に対応する前記素材７の端部を熱シールしてシール部９
ａ,９ｂを形成することにより図３に示すように前記電
極群４の長辺と平行する端部が未シール部（開口部）１
０とした袋状外装フィルム素材１１とする。(First Step) First, the positive electrode, the separator, the negative electrode, and the separator are spirally wound into a substantially cylindrical shape, and then subjected to pressure molding at room temperature, for example, as shown in FIG. 1 and FIG. 1, a separator 2, a negative electrode 3, and a separator 2 are spirally wound to produce a flat and rectangular electrode group 4. Prior to the winding, external terminals 5 and 6 are connected to the positive and negative electrodes 1 and 3, respectively, for example, by ultrasonic welding. Subsequently, a two-fold cup-shaped exterior film material is prepared, and the flat electrode group 4 is placed in the cup 8 of the exterior film material 7 so that the surface opposite to the external terminals 5 and 6 is formed of the exterior film material. It is stored so as to be located on the bent part side. The exterior film material 7 has a structure in which a sealant film located on the inner surface side, for example, a gas barrier film such as an aluminum foil and a rigid organic resin film are laminated in this order. Subsequently, the left end of the exterior film material 7 corresponding to the long side of the electrode group 4 and the end of the material 7 corresponding to the extension side of the external terminals 5 and 6 are heat-sealed to form a sealing portion 9.
By forming the a and 9b, the end parallel to the long side of the electrode group 4 becomes an unsealed portion (opening) 1 as shown in FIG.
The bag-shaped exterior film material 11 was set to 0.
【００１２】前記正極、セパレータ、負極およびセパレ
ータを渦巻き状に捲回するための捲回機および巻芯は、
特に限定されないが、巻芯には円柱状、楕円柱状、平板
状、菱形状等のものを用いることができる。A winding machine and a winding core for spirally winding the positive electrode, the separator, the negative electrode and the separator include:
Although not particularly limited, a core having a columnar shape, an elliptical columnar shape, a flat plate shape, a diamond shape, or the like can be used.
【００１３】前記電極群を扁平状に成形するためのプレ
ス機は、特に限定されないが、電極群に均一な加圧力を
与えることが可能な一軸成形法が好ましい。The press for forming the electrode group into a flat shape is not particularly limited, but a uniaxial forming method capable of applying a uniform pressing force to the electrode group is preferable.
【００１４】（第２工程）図３に示すように袋状外装フ
ィルム素材１１の開口部１０を拡口し、この開口部１０
に非水電解液を大気圧下で例えば注入ノズル１２を通し
て所定量注入する。つづいて、図４に示すように図示し
ないバルブが介装された排気管１３および図示しないバ
ルブが介装された大気導入管１４が側壁に接続された角
型真空チャンバ１５を用意し、この真空チャンバ１５内
に大気圧下で非水電解液が注入された複数の袋状外装フ
ィルム素材１１をそれぞれ設置し、前記排気管１３に接
続された真空ポンプ（図示せず）を作動して前記真空チ
ャンバ１５内を所定の減圧度にすることにより前記複数
の袋状外装フィルム１１内の非水電解液を電極群４に含
浸させる。(Second Step) As shown in FIG. 3, the opening 10 of the bag-shaped exterior film material 11 is widened, and this opening 10
A predetermined amount of a non-aqueous electrolyte is injected under atmospheric pressure through, for example, an injection nozzle 12. Subsequently, as shown in FIG. 4, a rectangular vacuum chamber 15 in which an exhaust pipe 13 in which a valve (not shown) is interposed and an air introducing pipe 14 in which a valve (not shown) is interposed is connected to a side wall is prepared. A plurality of bag-shaped exterior film materials 11 into which a non-aqueous electrolyte is injected under atmospheric pressure are installed in a chamber 15, and a vacuum pump (not shown) connected to the exhaust pipe 13 is operated to operate the vacuum. The electrode group 4 is impregnated with the non-aqueous electrolyte in the plurality of bag-shaped exterior films 11 by reducing the pressure in the chamber 15 to a predetermined degree.
【００１５】前記非水電解液の含浸工程において、前記
排気管１３に介装した図示しないバルブおよび前記大気
導入管１４に介装した図示しないバルブの開度をそれぞ
れコントロールして前記真空チャンバ１５内をステップ
状に減圧にすることが好ましい。また、前記真空チャン
バ１５内の最大到達減圧度は１００Ｔｏｒｒ以下、より
好ましくは５０Ｔｏｒｒ以下にすることが望ましい。In the impregnation step of the non-aqueous electrolyte, the degree of opening of a valve (not shown) provided in the exhaust pipe 13 and a valve (not shown) provided in the atmosphere introducing pipe 14 are controlled to control the degree of opening of the vacuum chamber 15. Is preferably reduced stepwise. Further, it is preferable that the maximum attained decompression degree in the vacuum chamber 15 is 100 Torr or less, more preferably 50 Torr or less.
【００１６】（第３工程）前記含浸工程後に前記開口部
１０側の電極群４の長辺近傍に位置する前記袋状外装フ
ィルム素材１１部分を前記開口部１０に平行して熱シー
ルし、さらに不要なフィルム素材１１部分を切断するこ
とにより、図５、図６に示すようにシーラントフィルム
１６、ガスバリアフィルム１７および剛性を有する有機
樹脂フィルム１８がこの順序で積層され、３つの辺にシ
ール部９ａ，９ｂ，９ｃを有する外装フィルム１９内に
非水電解液が含浸された電極群４を密封した構造の薄型
二次電池を製造する。(Third Step) After the impregnating step, the bag-like exterior film material 11 located near the long side of the electrode group 4 on the opening 10 side is heat-sealed in parallel with the opening 10, By cutting off the unnecessary film material 11, a sealant film 16, a gas barrier film 17 and a rigid organic resin film 18 are laminated in this order as shown in FIGS. , 9b, and 9c, a thin secondary battery having a structure in which the electrode group 4 in which the nonaqueous electrolyte is impregnated in the exterior film 19 is sealed.
【００１７】前記熱シール工程は、減圧状態で行なうこ
とが好ましい。Preferably, the heat sealing step is performed under reduced pressure.
【００１８】次に、前記正極１、セパレータ２、負極
３、非水電解液および外装フィルム５を説明する。Next, the positive electrode 1, the separator 2, the negative electrode 3, the non-aqueous electrolyte and the outer film 5 will be described.
【００１９】前記正極１は、集電体の片面もしくは両面
に活物質を含む正極活物質層を形成した構造を有する。The positive electrode 1 has a structure in which a positive electrode active material layer containing an active material is formed on one or both surfaces of a current collector.
【００２０】前記集電体としては、例えばアルミニウ
ム、ニッケルまたはステンレスの板、アルミニウム、ニ
ッケルまたはステンレスのメッシュ等を挙げることがで
きる。Examples of the current collector include a plate of aluminum, nickel or stainless steel, and a mesh of aluminum, nickel or stainless steel.
【００２１】前記正極活物質としては、種々の酸化物、
例えば二酸化マンガン、リチウムマンガン複合酸化物、
リチウム含有ニッケル酸化物、リチウム含有コバルト化
合物、リチウム含有ニッケルコバルト酸化物、リチウム
含有鉄酸化物、リチウムを含むバナジウム酸化物や、二
硫化チタン、二硫化モリブデンなどのカルコゲン化合物
などを挙げることができる。中でも、リチウムコバルト
酸化物（ＬｉＣｏＯ2）、リチウムニッケル酸化物（Ｌ
ｉＮｉＯ2 ）、リチウムマンガン酸化物（ＬｉＭｎ2 Ｏ
4 またはＬｉＭｎＯ2 ）を用いると、高電圧が得られる
ために好ましい。As the positive electrode active material, various oxides,
For example, manganese dioxide, lithium manganese composite oxide,
Examples include lithium-containing nickel oxide, lithium-containing cobalt compound, lithium-containing nickel-cobalt oxide, lithium-containing iron oxide, lithium-containing vanadium oxide, and chalcogen compounds such as titanium disulfide and molybdenum disulfide. Among them, lithium cobalt oxide (LiCoO 2 ) and lithium nickel oxide (L
iNiO 2 ), lithium manganese oxide (LiMn 2 O)
4 or LiMnO 2 ) is preferable because a high voltage can be obtained.
【００２２】前記正極活物質層は、結着剤および導電剤
を含有することが好ましい。The positive electrode active material layer preferably contains a binder and a conductive agent.
【００２３】前記結着剤としては、例えばポリテトラフ
ルオロエチレン（ＰＴＦＥ）、ポリフッ化ビニリデン
（ＰＶＤＦ）、エチレン−プロピレン−ジエン共重合体
（ＥＰＤＭ）、スチレン−ブタジエンゴム（ＳＢＲ）等
を用いることができる。Examples of the binder include polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), ethylene-propylene-diene copolymer (EPDM), and styrene-butadiene rubber (SBR). it can.
【００２４】前記導電剤としては、例えばアセチレンブ
ラック、カーボンブラック、黒鉛等を挙げることができ
る。Examples of the conductive agent include acetylene black, carbon black, graphite and the like.
【００２５】前記正極から取り出される外部端子の主た
る材質は、アルミニウムであることが好ましい。また、
前記外装フィルムとのシール性を向上するために前記外
部端子に化学的または物理的な表面処理を行なうことが
より好ましい。The main material of the external terminal taken out from the positive electrode is preferably aluminum. Also,
It is more preferable to perform a chemical or physical surface treatment on the external terminals in order to improve the sealing property with the exterior film.
【００２６】前記セパレータ２としては、例えばポリエ
チレン、ポリプロピレン、エチレン−プロピレン共重合
体、エチレン−ブテン共重合体からなる微多孔性膜また
はこれら材料の繊維を有する織布、不織布により作られ
る。The separator 2 is made of, for example, a microporous film made of polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene copolymer, or a woven or nonwoven fabric having fibers of these materials.
【００２７】前記負極３は、集電体の少なくとも片面に
活物質を含む負極活物質層を形成した構造を有する。The negative electrode 3 has a structure in which a negative electrode active material layer containing an active material is formed on at least one surface of a current collector.
【００２８】前記集電体としては、例えば銅板、銅メッ
シュ等を挙げることができる。Examples of the current collector include a copper plate and a copper mesh.
【００２９】前記負極活物質は、特に限定されないが、
金属リチウム、リチウム合金、または充放電時にリチウ
ムイオンを可逆的に吸蔵・放出、もしくはインターカレ
ート・ディインターカレートするコークス、炭素繊維、
黒鉛、メソフェーズピッチ系炭素、熱分解気相炭素質
物、樹脂焼成体等の炭素質材料等を挙げることができ
る。The negative electrode active material is not particularly limited.
Lithium metal, lithium alloy, or coke or carbon fiber that reversibly inserts or releases lithium ions during charge / discharge, or intercalates / deintercalates,
Examples include graphite, mesophase pitch-based carbon, pyrolytic gas-phase carbonaceous materials, and carbonaceous materials such as resin fired bodies.
【００３０】前記負極活物質層は、例えば結着剤を含有
することが好ましい。The negative electrode active material layer preferably contains, for example, a binder.
【００３１】前記結着剤としては、例えばポリテトラフ
ルオロエチレン、ポリビニリデンフルオロライド、エチ
レン−プロピレン−ジエン共重合体、スチレン−ブタジ
エンゴム、カルボキシメチルセルロース等の結着剤を含
有することが好ましい。The binder preferably contains, for example, a binder such as polytetrafluoroethylene, polyvinylidene fluoride, ethylene-propylene-diene copolymer, styrene-butadiene rubber, and carboxymethyl cellulose.
【００３２】前記負極から取り出される外部端子の主た
る材質は、ニッケルであることが好ましい。また、前記
外装フィルムとのシール性を向上するために前記外部端
子に化学的または物理的な表面処理を行なうことがより
好ましい。The main material of the external terminal taken out from the negative electrode is preferably nickel. Further, it is more preferable to perform a chemical or physical surface treatment on the external terminals in order to improve the sealing property with the exterior film.
【００３３】前記外装フィルム素材７のシーラントフィ
ルムとしては、例えばポリエチレン（ＰＥ）フィルム、
ポリプロピレン（ＰＰ）フィルム、ポリプロピレン−ポ
リエチレン共重合体フィルム、アイオノマーフィルム、
エチレンビニルアセテート（ＥＶＡ）フィルム等を用い
ることができる。前記剛性を有する有機樹脂フィルムと
しては、例えばポリエチレンテレフタレート（ＰＥＴ）
フィルム、ナイロンフィルム等を用いることができる。As the sealant film of the exterior film material 7, for example, a polyethylene (PE) film,
Polypropylene (PP) film, polypropylene-polyethylene copolymer film, ionomer film,
An ethylene vinyl acetate (EVA) film or the like can be used. As the rigid organic resin film, for example, polyethylene terephthalate (PET)
Films, nylon films and the like can be used.
【００３４】前記シーラントフィルム、アルミニウム箔
および有機樹脂フィルムの厚さは、特に限定されない
が、シーラントフィルムは２０〜１００μｍ、アルミニ
ウム箔は２０〜８０μｍ、有機樹脂フィルム１０〜１０
０μｍにすることが好ましい。The thickness of the sealant film, the aluminum foil and the organic resin film is not particularly limited, but is 20 to 100 μm for the sealant film, 20 to 80 μm for the aluminum foil, 10 to 10 μm for the organic resin film.
Preferably, the thickness is 0 μm.
【００３５】前記非水電解液は、電解質を非水溶媒で溶
解した組成を有する。The non-aqueous electrolyte has a composition in which an electrolyte is dissolved in a non-aqueous solvent.
【００３６】電解質としては、例えば過塩素酸リチウム
（ＬｉＣｌＯ4）、四フッ化硼酸リチウム（ＬｉＢ
Ｆ4）、六フッ化燐酸リチウム（ＬｉＰＦ6）、六フッ化
砒素酸リチウム（ＬｉＡｓＦ6）、トリフルオロメタン
スルホン酸リチウム（ＬｉＣＦ3ＳＯ3）、ＬｉＮ（ＣＦ
3ＳＯ2）2等を用いることができる。As the electrolyte, for example, lithium perchlorate (LiClO 4 ), lithium tetrafluoroborate (LiB
F 4 ), lithium hexafluorophosphate (LiPF 6 ), lithium hexafluoroarsenate (LiAsF 6 ), lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), LiN (CF
3 SO 2 ) 2 or the like can be used.
【００３７】非水溶媒としては、沸点が２００℃以上の
高沸点系であればいずれのものも使用でき、例えばエチ
レンカーボネート、プロピレンカーボネート、ブチレン
カーボネート、γ−ブチロラクトン、スルホラン、３−
メチルスルホラン、テトラエチレングリコールジメチル
エーテル、トリエチレングリコールジメチルエーテル、
メチルトリグライム、ブチルジグライム等を用いること
ができる。これらの非水溶媒は、１種または２種以上の
混合物の形態で用いることができる。As the non-aqueous solvent, any high-boiling system having a boiling point of 200 ° C. or more can be used. For example, ethylene carbonate, propylene carbonate, butylene carbonate, γ-butyrolactone, sulfolane,
Methylsulfolane, tetraethylene glycol dimethyl ether, triethylene glycol dimethyl ether,
Methyl triglyme, butyl diglyme and the like can be used. These non-aqueous solvents can be used in the form of one kind or a mixture of two or more kinds.
【００３８】前記非水電解液は、通常、溶液の形態で用
いられるが、固体状（例えばゾル状、ゲル状等）、また
は固体状と溶液状の混合形態でもよい。The non-aqueous electrolyte is usually used in the form of a solution, but may be in the form of a solid (for example, a sol, a gel or the like) or a mixture of a solid and a solution.
【００３９】前記非水溶媒中の前記電解質の濃度は、
０．５モル／Ｌ以上にすることが好ましい。The concentration of the electrolyte in the non-aqueous solvent is as follows:
It is preferable to set it to 0.5 mol / L or more.
【００４０】前記電極群は、前述した扁平状のものに限
らず、正極、セパレータおよび負極を積層した構造のも
のでもよい。The electrode group is not limited to the flat one described above, but may have a structure in which a positive electrode, a separator and a negative electrode are laminated.
【００４１】本発明に係わる薄型電池の製造において、
外装フィルム素材は図１に示すカップ型に限らず、折り
曲げシール部を有するピロー構造の外装フィルム素材、
パウチ型の外装フィルム素材を用いてもよい。In the manufacture of the thin battery according to the present invention,
The exterior film material is not limited to the cup type shown in FIG. 1, but an exterior film material having a pillow structure having a bent seal portion,
A pouch-type exterior film material may be used.
【００４２】以上説明したように、本発明の薄型電池の
製造方法は正極および負極をセパレータを挟んで捲回も
しくは積層した電極群を中間にガスバリアフィルムを介
在させたプラスチックラミネートフィルムからなる外装
フィルム素材に収納すると共に、その外装フィルム素材
の一端を開口する工程と、高沸点系の非水溶媒を含む非
水電解液を前記外装フィルム素材にその開口部を通して
大気圧下で注入する工程と、前記外装フィルム素材を減
圧雰囲気下に置いて、前記外装フィルム素材内の前記電
極群に前記非水電解液を含浸する工程とを具備する。As described above, the method of manufacturing a thin battery according to the present invention provides an exterior film material composed of a plastic laminate film having a gas barrier film interposed between an electrode group in which a positive electrode and a negative electrode are wound or laminated with a separator interposed therebetween. Along with storing in the exterior film material, a step of opening one end of the exterior film material, and a step of injecting a non-aqueous electrolyte containing a high-boiling nonaqueous solvent into the exterior film material under atmospheric pressure through the opening portion, Placing the exterior film material under a reduced-pressure atmosphere and impregnating the electrode group in the exterior film material with the non-aqueous electrolyte.
【００４３】このような方法によれば、高沸点系の非水
溶媒を含む非水電解液を用いることによって、大気圧下
で前記外装フィルム素材に注入することができるため、
製造ラインが簡易になり、電極群に非水電解液を液量の
ばらつきを生じることなく円滑に含浸することができ
る。According to such a method, by using a non-aqueous electrolyte containing a non-aqueous solvent having a high boiling point, the non-aqueous electrolyte can be injected into the exterior film material under atmospheric pressure.
The production line is simplified, and the electrode group can be smoothly impregnated with the non-aqueous electrolyte without causing a variation in the amount of the solution.
【００４４】また、前記含浸工程後に前記外装フィルム
素材の開口部を熱シールする際、減圧下で行なって前記
電極群および非水電解液を外装フィルム内に密閉するこ
とによって、厚さがより薄い薄型電池を製造できる。When the opening of the exterior film material is heat-sealed after the impregnation step, the thickness is reduced by sealing the group of electrodes and the non-aqueous electrolyte in the exterior film by performing the process under reduced pressure. Thin batteries can be manufactured.
【００４５】さらに、前記含浸工程において雰囲気中の
減圧度を制御して減圧度をステップ状に高くすることに
よって前記外装フィルム素材に注入した非水電解液の吹
き出しを抑制しつつ、非水電解液を電極群に含浸するこ
とができる。その上、前記含浸工程後に前記外装フィル
ム素材の開口部を減圧下で熱シールする際、非水電解液
の外装フィルム素材からの突沸を抑制することができ
る。Further, in the impregnation step, the degree of pressure reduction in the atmosphere is controlled so as to increase the degree of pressure reduction in a step-like manner, thereby preventing the non-aqueous electrolyte solution injected into the exterior film material from being blown out. Can be impregnated into the electrode group. In addition, when the opening of the exterior film material is heat-sealed under reduced pressure after the impregnation step, bumping of the non-aqueous electrolyte from the exterior film material can be suppressed.
【００４６】[0046]
【実施例】以下、本発明の好ましい実施例を前述した図
面を参照して説明する。Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
【００４７】（実施例１） ＜正極の作製＞まず、活物質としてのＬｉＣｏＯ2粉末
８９重量部に導電フィラーとしてのグラファイト粉末８
重量部および結着剤としてポリフッ化ビニリデン樹脂３
重量部をＮ−メチルピロリドン２５重量部に混合してペ
ーストを調製した。このペーストを外部端子が取付けら
れたアルミニウム箔の両面に塗布し、乾燥し、さらにプ
レス加工、スリット加工を施してリール状の正極を作製
した。Example 1 <Preparation of Positive Electrode> First, graphite powder 8 as a conductive filler was added to 89 parts by weight of LiCoO 2 powder as an active material.
Parts by weight and polyvinylidene fluoride resin 3 as a binder
Parts by weight was mixed with 25 parts by weight of N-methylpyrrolidone to prepare a paste. This paste was applied to both sides of an aluminum foil to which external terminals were attached, dried, and then subjected to press working and slit processing to produce a reel-shaped positive electrode.
【００４８】＜負極の作製＞まず、鱗片状グラファイト
カーボン１００重量部をカルボキシメチルセルロースお
よびスチレン−ブタジエンの架橋ゴムラテックス粒子２
重量部を含む水溶液に混合してペーストを調製した。こ
のペーストを外部端子が取付けられた銅箔の両面に塗布
し、乾燥し、さらにプレス加工、スリット加工を施して
リール状の負極を作製した。<Preparation of Negative Electrode> First, 100 parts by weight of flaky graphite carbon was mixed with carboxymethyl cellulose and styrene-butadiene crosslinked rubber latex particles 2
It was mixed with an aqueous solution containing parts by weight to prepare a paste. This paste was applied to both sides of the copper foil to which the external terminals were attached, dried, and then subjected to press working and slit processing to produce a reel-shaped negative electrode.
【００４９】＜非水電解液＞エチレンカーボネートとγ
−ブチロラクトンを１：１の体積比で混合した高沸点系
混合溶媒（沸点２０５℃）に四フッ化硼酸リチウム（Ｌ
ｉＢＦ4）を１モル／Ｌ溶解して非水電解液を調製し
た。<Non-aqueous electrolyte> Ethylene carbonate and γ
Lithium tetrafluoroborate (L) was added to a high-boiling mixed solvent (boiling point 205 ° C.) in which butyrolactone was mixed at a volume ratio of 1: 1.
iBF 4 ) was dissolved at 1 mol / L to prepare a non-aqueous electrolyte.
【００５０】次いで、前記正負極の間および正極側にポ
リエチレン製微多孔膜を配置し、正負極にアルミニウム
製外部端子を、負極にニッケル製外部端子をそれぞれ接
続した後、捲回機により前記正極のアルミニウム箔が最
外周に位置するように渦巻き状に捲回して円筒状物を作
成した。つづいて、この円筒状物を８０℃、１５ｋｇｆ
／ｃｍ2の圧力で加熱加圧成形することにより扁平状を
なす電極群を作製した。Next, a polyethylene microporous membrane is disposed between the positive and negative electrodes and on the positive electrode side, and an aluminum external terminal is connected to the positive and negative electrodes, and a nickel external terminal is connected to the negative electrode. The aluminum foil was spirally wound so that the aluminum foil was positioned at the outermost periphery to form a cylindrical object. Subsequently, this cylindrical object is heated at 80 ° C. and 15 kgf
An electrode group having a flat shape was produced by heating and pressing at a pressure of / cm 2 .
【００５１】次いで、二つ折りされたカップ型外装フィ
ルム素材（シーラントフィルム、アルミニウム箔および
ナイロンフィルムのラミネートフィルム）を用意し、こ
の外装フィルム素材のカップ内に前記扁平状電極群をそ
の外部端子の反対側の面が前記外装フィルム素材の折り
曲げ部側に位置するように収納した。つづいて、前記電
極群の長辺に対応する前記外装フィルム素材の左端部お
よび前記各外部端子の延出側に対応する前記素材の端部
を熱シールしてシール部を形成することにより前記電極
群の長辺と平行する端部が未シール部（開口部）とした
袋状外装フィルム素材を作製した。Next, a cup-shaped exterior film material (a laminate film of a sealant film, an aluminum foil and a nylon film) which is folded in two is prepared, and the flat electrode group is placed in a cup of the exterior film material opposite to its external terminals. The outer film material was housed so that its side surface was located on the bent portion side of the exterior film material. Subsequently, the left end of the exterior film material corresponding to the long side of the electrode group and the end of the material corresponding to the extension side of each of the external terminals are heat-sealed to form a seal portion, thereby forming the electrode. A bag-shaped exterior film material in which an end parallel to the long side of the group was an unsealed portion (opening) was produced.
【００５２】次いで、前記袋状外装フィルム素材の開口
部を拡口し、この開口部に前記組成の非水電解液３．２
０ｇを大気圧下で注入ノズルを通して注入した。つづい
て、角型真空チャンバ内に複数の前記袋状外装フィルム
素材をそれぞれ設置し、前記チャンバの排気管に接続さ
れた真空ポンプを作動すると共に、その排気管に介装さ
れたバルブの開閉および前記チャンバの大気導入管に介
装されたバルブの開閉を行なって、減圧・大気開放を繰
り返して前記チャンバ内の減圧度をステップ状に上げて
最大到達減圧度５０Ｔｏｒｒにすることにより前記袋状
外装フィルム素材において非水電解液を電極群に含浸さ
せた。ひきつづき、減圧状態で前記開口部側の電極群の
長辺近傍に位置する前記袋状外装フィルム素材部分を前
記開口部に平行して熱シールし、さらに不要なフィルム
素材部分を切断することにより、図５、図６に示すよう
に外装フィルム１９内に非水電解液が含浸された電極群
４を密封した構造を有する２０個の薄型二次電池を製造
した。Next, the opening of the bag-shaped exterior film material was widened, and the nonaqueous electrolytic solution 3.2 having the above composition was formed in the opening.
0 g were injected at atmospheric pressure through the injection nozzle. Subsequently, a plurality of the bag-shaped exterior film materials are respectively installed in a rectangular vacuum chamber, and a vacuum pump connected to an exhaust pipe of the chamber is operated, and opening and closing of a valve interposed in the exhaust pipe and The bag-shaped exterior is opened and closed by repeatedly opening and closing a valve interposed in an air introduction pipe of the chamber, and increasing the decompression degree in the chamber in steps by reducing and opening the air to the maximum decompression degree of 50 Torr. The electrode group was impregnated with a non-aqueous electrolyte in a film material. Subsequently, the bag-shaped exterior film material portion located in the vicinity of the long side of the electrode group on the opening side under reduced pressure is heat-sealed in parallel with the opening, and further unnecessary film material portions are cut, As shown in FIGS. 5 and 6, 20 thin secondary batteries having a structure in which the electrode group 4 in which the non-aqueous electrolyte was impregnated in the outer film 19 were sealed were manufactured.
【００５３】（比較例１）非水電解液としてエチレンカ
ーボネートおよびメチルエチルカーボネートを１：１の
体積比混合した混合溶媒（沸点１１０℃）に六フッ化燐
酸リチウム（ＬｉＰＦ6）を１モル／Ｌ溶解して調製し
たものを用いた以外、実施例１と同様な方法により２０
個の薄型非水電解液二次電池を製造した。Comparative Example 1 As a non-aqueous electrolyte, 1 mol / L of lithium hexafluorophosphate (LiPF 6 ) was mixed with a mixed solvent (boiling point: 110 ° C.) in which ethylene carbonate and methyl ethyl carbonate were mixed at a volume ratio of 1: 1. Except for using a solution prepared by dissolving, 20
Two thin non-aqueous electrolyte secondary batteries were manufactured.
【００５４】得られた実施例１および比較例１の２０個
の薄型非水電解液二次電池について、非水電解液の注
入、含浸前と非水電解液含浸後の二次電池の重量を測定
することにより含浸後の非水電解液の重量を求めた。そ
の結果を下記表１に示す。For the 20 thin non-aqueous electrolyte secondary batteries of Example 1 and Comparative Example 1, the weight of the secondary batteries before injection and impregnation of the non-aqueous electrolyte and after impregnation with the non-aqueous electrolyte were measured. The weight of the non-aqueous electrolyte after impregnation was determined by measurement. The results are shown in Table 1 below.
【００５５】[0055]
【表１】 [Table 1]
【００５６】前記表１から明らかなように実施例１の薄
型非水電解液二次電池は、電極群に含浸される非水電解
液量のばらつきが比較例１の低沸点の非水電解液を用い
る薄型非水電解液二次電池に比べて極めて小さく、安定
した非水電解液の注入・含浸がなされ、高沸点系の非水
電解液の含浸に有効であることがわかる。As is clear from Table 1, the thin non-aqueous electrolyte secondary battery of Example 1 has a low boiling point non-aqueous electrolyte of Comparative Example 1 in which the amount of non-aqueous electrolyte impregnated in the electrode group varies. It can be seen that injection and impregnation of a non-aqueous electrolyte are extremely small and stable compared with a thin non-aqueous electrolyte secondary battery using, and it is effective for impregnation with a high-boiling non-aqueous electrolyte.
【００５７】[0057]
【発明の効果】以上詳述したように、本発明によれば高
沸点（沸点２００℃以上）の非水溶媒を含む非水電解液
を用い、簡易な製造ラインで前記非水電解液を外装フィ
ルム素材内の電極群に均一に含浸することが可能で、一
体型ビデオカメラ、移動通信機、ノートブック型パソコ
ン等のコードレスの携帯型電子機器の電源等に有効な薄
型電池の製造方法を提供できる。As described above in detail, according to the present invention, a non-aqueous electrolyte containing a non-aqueous solvent having a high boiling point (boiling point of 200 ° C. or more) is used, and the non-aqueous electrolyte is packaged on a simple production line. Provides a method of manufacturing a thin battery that can uniformly impregnate the electrodes in a film material and is effective as a power source for cordless portable electronic devices such as integrated video cameras, mobile communication devices, and notebook computers. it can.
【図１】本発明に係わる薄型非水電解液二次電池の製造
工程を示す斜視図。FIG. 1 is a perspective view showing a manufacturing process of a thin non-aqueous electrolyte secondary battery according to the present invention.
【図２】図１のII−II線に沿う断面図。FIG. 2 is a sectional view taken along the line II-II in FIG.
【図３】本発明に係わる薄型非水電解液二次電池の製造
工程を示す斜視図。FIG. 3 is a perspective view showing a manufacturing process of the thin non-aqueous electrolyte secondary battery according to the present invention.
【図４】本発明に係わる薄型非水電解液二次電池の製造
に用いられる角型真空チャンバを示す斜視図。FIG. 4 is a perspective view showing a rectangular vacuum chamber used for manufacturing a thin non-aqueous electrolyte secondary battery according to the present invention.
【図５】本発明に係る方法により製造された薄型非水電
解液二次電池を示す斜視図。FIG. 5 is a perspective view showing a thin non-aqueous electrolyte secondary battery manufactured by the method according to the present invention.
【図６】図５のVI−VI線に沿う断面図。FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;
１…正極、 ２…セパレータ、 ３…負極、 ４…電極群、 ５，６…外部端子、 ７…外装フィルム素材、 ９ａ，９ｂ，９ｃ…シール部、 １１…袋状外装フィルム素材、 １５…角型真空チャンバ、 １６…シーラントフィルム、 １７…ガスバリアフィルム、 １８…剛性を有する有機樹脂フィルム １９…外装フィルム。 DESCRIPTION OF SYMBOLS 1 ... Positive electrode, 2 ... Separator, 3 ... Negative electrode, 4 ... Electrode group, 5, 6 ... External terminal, 7 ... Exterior film material, 9a, 9b, 9c ... Seal part, 11 ... Bag-shaped exterior film material, 15 ... Square Mold vacuum chamber, 16: sealant film, 17: gas barrier film, 18: organic resin film having rigidity 19: exterior film
Claims (4)
回もしくは積層した電極群を中間にガスバリアフィルム
を介在させたプラスチックラミネートフィルムからなる
外装フィルム素材に収納すると共に、その外装フィルム
素材の一端を開口する工程と、 高沸点系の非水溶媒を含む非水電解液を前記外装フィル
ム素材にその開口部を通して大気圧下で注入する工程
と、 前記外装フィルム素材を減圧雰囲気下に置いて、前記外
装フィルム素材内の前記電極群に前記非水電解液を含浸
する工程とを具備したことを特徴とする薄型電池の製造
方法。An electrode group in which a positive electrode and a negative electrode are wound or laminated with a separator interposed therebetween is housed in an exterior film material made of a plastic laminate film with a gas barrier film interposed therebetween, and one end of the exterior film material is opened. And a step of injecting a non-aqueous electrolyte containing a non-aqueous solvent having a high boiling point into the exterior film material under atmospheric pressure through the opening thereof. Impregnating the non-aqueous electrolyte into the electrode group in a film material.
は、１００Ｔｏｒｒ以下であることを特徴とする請求項
１記載の薄型電池の製造方法。2. The method for manufacturing a thin battery according to claim 1, wherein a maximum ultimate pressure reduction degree in the impregnation step is 100 Torr or less.
高くすることによりなされることを特徴とする請求項１
または２記載の薄型電池の製造方法。3. The method according to claim 1, wherein the impregnating step is performed by increasing the degree of decompression stepwise.
Or a method for manufacturing a thin battery according to 2.
の開口部を熱シールする際、減圧下で行なって前記電極
群および非水電解液を外装フィルム内に密閉することを
特徴とする請求項１ないし３いずれか記載の薄型電池の
製造方法。4. The method according to claim 1, wherein the heat sealing of the opening of the exterior film material after the impregnation step is performed under reduced pressure to seal the electrode group and the non-aqueous electrolyte in the exterior film. 4. The method for producing a thin battery according to any one of items 3 to 3.
Priority Applications (1)
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|---|---|---|---|
| JP2000301506A JP2002110246A (en) | 2000-09-29 | 2000-09-29 | Method of producing thin battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000301506A JP2002110246A (en) | 2000-09-29 | 2000-09-29 | Method of producing thin battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002110246A true JP2002110246A (en) | 2002-04-12 |
Family
ID=18783039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000301506A Pending JP2002110246A (en) | 2000-09-29 | 2000-09-29 | Method of producing thin battery |
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| Country | Link |
|---|---|
| JP (1) | JP2002110246A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008071496A (en) * | 2006-09-12 | 2008-03-27 | Enax Inc | Sheet-shaped secondary battery and its manufacturing method |
| KR101043847B1 (en) | 2003-02-28 | 2011-06-22 | 에프디케이 가부시키가이샤 | Heat-Resistant Lithium Battery |
| KR20120013901A (en) * | 2010-08-06 | 2012-02-15 | 소니 주식회사 | Battery and method for producing the same |
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| WO2000041263A1 (en) * | 1998-12-28 | 2000-07-13 | Mitsubishi Denki Kabushiki Kaisha | Thin battery and method of manufacturing |
| JP2000200587A (en) * | 1999-01-04 | 2000-07-18 | Mitsubishi Electric Corp | Battery and its manufacture |
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| JPH10270072A (en) * | 1997-03-21 | 1998-10-09 | Japan Storage Battery Co Ltd | Manufacture of nonaqueous electrolyte secondary battery |
| JPH10302827A (en) * | 1997-04-24 | 1998-11-13 | Nec Corp | Manufacture of electrode group of angular battery |
| JPH11307133A (en) * | 1998-02-19 | 1999-11-05 | Matsushita Electric Ind Co Ltd | Manufacture of organic electrolyte battery |
| WO2000041263A1 (en) * | 1998-12-28 | 2000-07-13 | Mitsubishi Denki Kabushiki Kaisha | Thin battery and method of manufacturing |
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|---|---|---|---|---|
| KR101043847B1 (en) | 2003-02-28 | 2011-06-22 | 에프디케이 가부시키가이샤 | Heat-Resistant Lithium Battery |
| JP2008071496A (en) * | 2006-09-12 | 2008-03-27 | Enax Inc | Sheet-shaped secondary battery and its manufacturing method |
| KR20120013901A (en) * | 2010-08-06 | 2012-02-15 | 소니 주식회사 | Battery and method for producing the same |
| KR101893608B1 (en) * | 2010-08-06 | 2018-08-30 | 가부시키가이샤 무라타 세이사쿠쇼 | Battery and method for producing the same |
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