JPH11154495A - Sheet-like battery - Google Patents
Sheet-like batteryInfo
- Publication number
- JPH11154495A JPH11154495A JP9318101A JP31810197A JPH11154495A JP H11154495 A JPH11154495 A JP H11154495A JP 9318101 A JP9318101 A JP 9318101A JP 31810197 A JP31810197 A JP 31810197A JP H11154495 A JPH11154495 A JP H11154495A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- electrode
- battery
- shaped
- lithium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、シート状電池に係
り、さらに詳しくはコンパクト化、および暴発防止化し
たシート状電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-type battery, and more particularly, to a sheet-type battery having a reduced size and a reduced explosion.
【０００２】[0002]
【従来の技術】携帯型の電話機やテレビカメラなどの電
源としては、小形、軽量、薄型や大容量、高電圧化など
が求められており、たとえば、正極層、ポリマ−電解質
層および負極層を重ね合わせ、シート状（薄型）に一体
化した構成の電極要素（電池要素）を備えた厚さ 0.5mm
程度のリチウム非水溶媒電池も知られている（米国特許
第 5,296,318号明細書など）。2. Description of the Related Art Small, lightweight, thin, large-capacity, high-voltage power sources are required for power supplies for portable telephones and television cameras. For example, a positive electrode layer, a polymer electrolyte layer and a negative electrode layer are required. 0.5 mm thick with electrode elements (battery elements) that are stacked and integrated into a sheet (thin)
Some lithium non-aqueous solvent batteries are also known (US Pat. No. 5,296,318, etc.).
【０００３】図４は、前記ポリマー電解質電池の要部構
成を断面的に示したものである。FIG. 4 is a cross-sectional view showing the structure of a main part of the polymer electrolyte battery.
【０００４】図４において、１はセパレーターの機能を
する電解質保持性のポリマ−電解質系（たとえばヘキサ
フロロプロピレン−フッ化ビニリデン共重合体などのポ
リマと、リチウム塩などのエチレンカーボネート溶液…
非水電解液…との系）、２は金属酸化物などの活物質、
非水電解液および電解質保持性ポリマーを含む正極層を
集電体に積層して成る正極、３はリチウムイオンを吸蔵
・放出する活物質、非水電解液および電解質保持性ポリ
マーを含む負極層を集電体に積層して成る負極でる。ま
た、４，５は前記セパレーター１、正極２および負極３
の積層体から成る電池要素を対応する電極端子2a、3aを
外部に導出しながら封装し、保護する外装樹脂フィルム
から成るシール層（封止層）である。In FIG. 4, reference numeral 1 denotes an electrolyte-retaining polymer-electrolyte system which functions as a separator (for example, a polymer such as a hexafluoropropylene-vinylidene fluoride copolymer) and an ethylene carbonate solution such as a lithium salt.
A non-aqueous electrolyte solution), 2 is an active material such as a metal oxide,
A positive electrode formed by laminating a positive electrode layer containing a non-aqueous electrolyte and an electrolyte-retaining polymer on a current collector; and 3, an active material for absorbing and releasing lithium ions, and a negative electrode layer containing a non-aqueous electrolyte and an electrolyte-retaining polymer. It is a negative electrode laminated on a current collector. Reference numerals 4 and 5 denote the separator 1, the positive electrode 2 and the negative electrode 3, respectively.
Is a sealing layer (sealing layer) made of an exterior resin film that seals and protects the battery element made of the laminate of (1) while leading the corresponding electrode terminals 2a and 3a to the outside.
【０００５】なお、正極集電体は、たとえばアルミニウ
ム箔、アルミニウムメッシュ、アルミニウム製エキスバ
ンドメタル、アルミニウム製パンチメタルなどであり、
これらに電極端子となるアルミニウム箔片を溶接した構
成と成っている。一方、負極集電体は、銅箔、銅製エキ
スバンドメタル、銅製パンチメタルなどであり、これら
に電極端子となる銅箔片を溶接した構成と成っている。The positive electrode current collector is, for example, aluminum foil, aluminum mesh, aluminum band metal, aluminum punch metal, or the like.
An aluminum foil piece serving as an electrode terminal is welded to these. On the other hand, the negative electrode current collector is a copper foil, a copper expanded metal, a copper punched metal, or the like, and has a configuration in which a copper foil piece serving as an electrode terminal is welded thereto.
【０００６】ここで、正極２の活物質としては、リチウ
ムイオンを吸蔵・放出するリチウム含有金属酸化物、た
とえばリチウムマンガン複合酸化物、リチウム含有コバ
ルト酸化物、リチウム含有ニッケルコバルト酸化物、リ
チウムを含む非晶質五酸化バナジウムや、二酸化マンガ
ン、カルコゲン化合物などが挙げられる。Here, the active material of the positive electrode 2 includes lithium-containing metal oxides that occlude and release lithium ions, such as lithium-manganese composite oxide, lithium-containing cobalt oxide, lithium-containing nickel-cobalt oxide, and lithium. Examples include amorphous vanadium pentoxide, manganese dioxide, and chalcogen compounds.
【０００７】また、負極活物質としては、たとえばビス
フェノール樹脂、ポリアクリロニトリル、セルローズな
どの焼成物、コークスやピッチの焼成物が挙げられ、こ
れらは天然もしくは人口グラファイト、カーボンブラッ
ク、アセチレンブラック，ケッチェンブラック、ニッケ
ル粉末、ニッケル粉末などを含有した形態を採ってもよ
い。Examples of the negative electrode active material include fired products such as bisphenol resin, polyacrylonitrile, and cellulose, and fired products of coke and pitch. These are natural or artificial graphite, carbon black, acetylene black, and Ketjen black. , Nickel powder, nickel powder, and the like.
【０００８】さらに、電解質系１は、たとえばエチレン
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、ジメチルカーボネート、ジエチルカーボネー
ト、メチルエチルカーボネートなどの非水溶媒に、過塩
素酸リチウム、六フッ化リン酸リチウム、ホウ四フッ化
リチウム、六フッ化ヒ素リチウム、トリフルオロメタン
スルホン酸リチウムなどを 0.2〜 2mol/ l程度に溶解さ
せたものが挙げられる。 そして、この種の軽量、フレ
キシブルなリチウムポリマー電池の製造に当たっては、
電極要素である正極２、セパレータ（ポリマ−電解質
系）１および負極３を積層状に組み合わせる。その後、
電池要素の両面側に外装樹脂フィルム４，５を積層・配
置し、集電体に接続する各電極端子2a，3aを外部に導出
しながら、前記外装樹脂フィルム４，５の周縁部を溶
着、もしくは接着剤層を介して接合・一体化して封装す
ることによって、シート状のリチウムポリマー電池を製
造している。Further, the electrolyte system 1 is prepared by adding lithium perchlorate, lithium hexafluorophosphate, boron tetrafluoride to a non-aqueous solvent such as ethylene carbonate, propylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate and methyl ethyl carbonate. Examples thereof include those in which lithium fluoride, lithium arsenide hexafluoride, lithium trifluoromethanesulfonate, and the like are dissolved at about 0.2 to 2 mol / l. And in producing this kind of lightweight, flexible lithium polymer battery,
The positive electrode 2, the separator (polymer-electrolyte system) 1, and the negative electrode 3, which are electrode elements, are combined in a layered manner. afterwards,
The outer resin films 4, 5 are laminated and arranged on both sides of the battery element, and the outer peripheral portions of the outer resin films 4, 5 are welded while the respective electrode terminals 2a, 3a connected to the current collector are led out. Alternatively, a sheet-shaped lithium polymer battery is manufactured by joining, integrating and sealing through an adhesive layer.
【０００９】なお、上記リチウムポリマー電池に限ら
ず、シート状電池ないし平板状電池の場合は、それらの
構成部材など変わって、同様の構成を採って、また、同
様の手段で製造されている。Not only the above-mentioned lithium polymer battery, but also a sheet-shaped battery or a flat-shaped battery is manufactured by using the same configuration and using the same means instead of the components.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、上記シ
ート状リチウムポリマー電池の場合、次のような不都合
がある。すなわち、上記構成のシート状リチウムポリマ
ー電池においては、電極要素の各集電体に、それぞれ一
端を接続した電極端子2a，3aが、そのまま延設した形で
外部に同一平面を成して封止・導出されている。換言す
ると、少なくとも電極端子2a，3aを封止・導出する辺に
おいては、外装樹脂フィルム４，５の溶着・接合封止に
要する面積が比較的大きく採られ、その分、シート状リ
チウムポリマー電池のコンパクト化が損なわれるか、あ
るいは電池容量の低減となるなどの問題がある。However, the above-mentioned sheet-shaped lithium polymer battery has the following disadvantages. That is, in the sheet-shaped lithium polymer battery having the above structure, the electrode terminals 2a and 3a each having one end connected to each of the current collectors of the electrode element are formed in the same plane to the outside in the form of being directly extended and sealed.・ Derived. In other words, at least on the sides where the electrode terminals 2a and 3a are sealed and led out, a relatively large area required for welding and joining and sealing the exterior resin films 4 and 5 is taken, and accordingly, the sheet-shaped lithium polymer battery There are problems such as a reduction in compactness or a reduction in battery capacity.
【００１１】また、上記構成のシート状二次電池の場合
は、充放電の過程で（使用中）、電極要素など外装樹脂
フィルム４，５に封装された領域内のガス圧が上昇する
と、容易に破損する恐れがある。すなわち、外装樹脂フ
ィルム４，５は重ね合わせ部の全周辺を溶着・接合して
封止した構成と成っているため、封装された領域内にガ
スガ生じ内圧が上昇すると、前記溶着・接合部の一部が
暴発的に破損し、内部のガスを放出することになる。し
たがって、取扱操作において、装着組み込んだ機器類の
損傷などを招来する恐れもあり、安全性が懸念される。In the case of the sheet-shaped secondary battery having the above-described structure, if the gas pressure in the region sealed with the exterior resin films 4 and 5 such as the electrode elements increases during the charging / discharging process (during use), it is easy. May be damaged. That is, since the exterior resin films 4 and 5 have a configuration in which the entire periphery of the overlapped portion is welded and joined and sealed, when gas is generated in the sealed region and the internal pressure rises, the welding / joined portion of the welded / joined portion is increased. Some parts will be damaged in a violent manner, releasing the gas inside. Therefore, in handling operation, there is a possibility that the installed and built-in equipment may be damaged, and there is a concern about safety.
【００１２】本発明は、このような事情に対処してなさ
れたもので、よりコンパクト化もしくはより高容量化と
ともに、暴発性も回避されたシート状電池の提供を目的
とする。The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sheet-shaped battery which is more compact, has a higher capacity, and is also free from explosiveness.
【００１３】[0013]
【課題を解決するための手段】請求項１の発明は、正極
集電体を有するシート状正極と、前記シート状正極主面
に積層・配置され、かつ電解液を担持するシート状セパ
レーターと、前記シート状セパレーター主面に積層・配
置された負極集電体を有するシート状負極と、前記シー
ト状電極およびシート状セパレーターの積層体から成る
電極要素を封装する外装樹脂フィルムと、前記シート状
電極の集電体に一端がそれぞれ接続し、電極要素の端面
に沿わせて折り曲げられ、かつ電池主面に平行して同一
面を成して他端が外装樹脂フィルム外に封止・導出され
た正・負両電極端子とを有するシート状電池であって、
前記外装樹脂フィルムの周辺重ね合わせ封止部の一部が
挟着性治具で、挟着封止されていることを特徴とするシ
ート状電池である。According to the present invention, there is provided a sheet-like positive electrode having a positive electrode current collector, a sheet-like separator laminated and arranged on the main surface of the sheet-like positive electrode and carrying an electrolytic solution, A sheet-shaped negative electrode having a negative electrode current collector laminated and arranged on the main surface of the sheet-shaped separator, an exterior resin film for sealing an electrode element composed of a stacked body of the sheet-shaped electrode and the sheet-shaped separator, and the sheet-shaped electrode One end was connected to the current collector of each, bent along the end face of the electrode element, and made the same plane parallel to the main surface of the battery, and the other end was sealed and led out of the exterior resin film. A sheet-like battery having both positive and negative electrode terminals,
A sheet-shaped battery, wherein a part of a peripheral overlapping sealing portion of the exterior resin film is sandwiched and sealed by a sandwiching jig.
【００１４】請求項２の発明は、リチウム含有金属酸化
物を活物質とし、かつ正極集電体を有するシート状正極
と、前記シート状正極主面に積層・配置され、かつ電解
液を担持するシート状セパレーターと、前記シート状セ
パレーター主面に積層・配置されたリチウム金属もしく
はリチウムを吸蔵・放出する炭素質材を活物質とし、か
つ負極集電体を有するシート状負極と、前記シート状電
極およびシート状セパレーターの積層体から成る電極要
素を封装する外装樹脂フィルムと、前記シート状電極の
集電体に一端がそれぞれ接続し、電極要素の端面に沿わ
せて折り曲げられ、かつ電池主面に平行して同一面を成
して他端が外装樹脂フィルム外に封止・導出された正・
負両電極端子とを有するリチウムポリマー電池であっ
て、前記外装樹脂フィルムの周辺重ね合わせ封止部の一
部が挟着性治具で、挟着封止されていることを特徴とす
るリチウムポリマー電池である。According to a second aspect of the present invention, there is provided a sheet-like positive electrode comprising a lithium-containing metal oxide as an active material and having a positive electrode current collector, and laminated and arranged on the main surface of the sheet-like positive electrode, and carrying an electrolyte. A sheet-shaped separator, a sheet-shaped negative electrode having a lithium metal or a carbonaceous material that occludes / releases lithium as an active material and laminated and disposed on the main surface of the sheet-shaped separator, and a negative electrode current collector; and the sheet-shaped electrode. And an exterior resin film for sealing the electrode element composed of a laminate of sheet-like separators, and one end respectively connected to the current collector of the sheet-like electrode, bent along the end face of the electrode element, and on the main surface of the battery. The positive and negative leads that are parallel and form the same surface and the other end is sealed and led out of the exterior resin film
A lithium polymer battery having both negative electrode terminals, wherein a part of a peripheral overlapping sealing portion of the exterior resin film is sandwiched and sealed by a sandwiching jig. Battery.
【００１５】すなわち、請求項１および請求項２の発明
は、シート状電池（一次電池、二次電池）において、正
・負両電極端子を電極要素の端面に沿わせて折り曲げ、
かつ電池主面に平行する同一面を成して外装樹脂フィル
ム外に封止・導出するとともに、前記外装樹脂フィルム
の重ね合わせ封止部の大部分を溶接ないし接着封止し、
一部を溶接ないし接着封止せずに挟着性治具によって、
挟着封止したことを骨子としている。That is, according to the first and second aspects of the present invention, in a sheet battery (primary battery, secondary battery), both positive and negative electrode terminals are bent along the end faces of the electrode elements.
And while forming the same plane parallel to the main surface of the battery and sealing and leading out of the exterior resin film, and welding or adhesively sealing most of the overlapping sealing portion of the exterior resin film,
With a clamping jig without welding or bonding partly,
The essence of sandwiching and sealing is the outline.
【００１６】なお、請求項１および請求項２の発明にお
いて、正・負のシート状電極、シート状セパレーター、
各集電体および外装樹脂フィルムは、たとえばリチウム
ポリマー電池場合、あるいはニッケル水素電池の場合な
ど、対応する電池ごとの各構成材料、構造や形状など
は、基本的に、従来の場合と変わらない。In the first and second aspects of the present invention, the positive and negative sheet electrodes, the sheet separator,
Each of the current collectors and the exterior resin films are basically the same as those of the conventional case, for example, in the case of a lithium polymer battery or a nickel-metal hydride battery, and the constituent materials, structures, shapes, etc. of the corresponding batteries are the same.
【００１７】[0017]
【発明の実施の形態】以下、図１、図２および図３を参
照して実施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. 1, 2 and 3. FIG.
【００１８】図１は、実施例に係るリチウムポリマー電
池の要部構成を部一切り欠いて示す平面図、図２は図１
の A-A線に沿った断面図である。図１および図２におい
て、１は電解液を担持するシート状セパレーター、２は
前記シート状セパレーター１の一主面に積層・配置され
たリチウム含有金属酸化物を活物質とし、かつ正極集電
体を有するシート状正極、３は前記シート状セパレータ
ー１の他主面に積層・配置されたリチウム金属もしくは
リチウムを吸蔵・放出する炭素質材を活物質とし、かつ
負極集電体を有するシート状負極である。FIG. 1 is a plan view showing a main part of a lithium polymer battery according to an embodiment, with a part cut away. FIG.
FIG. 3 is a cross-sectional view taken along line AA of FIG. 1 and 2, reference numeral 1 denotes a sheet-like separator for supporting an electrolytic solution; 2, a lithium-containing metal oxide laminated and arranged on one main surface of the sheet-like separator 1 as an active material; The sheet-like negative electrode 3 has a lithium metal or a carbonaceous material that occludes / releases lithium as an active material, and has a negative electrode current collector. It is.
【００１９】ここで、シート状セパレーター１は、電解
質保持性のポリマ、たとえばヘキサフロロプロピレン−
フッ化ビニリデン共重合体などのポリマ−電解質系であ
る。また、シート状の正極２は、リチウムを含む金属酸
化物などの活物質、電解質保持性ポリマーおよび正極集
電体で構成されており、シート状の負極は、たとえばリ
チウムイオンを吸蔵・放出する活物質、電解質保持性ポ
リマーをおよび負極集電体で構成されている。Here, the sheet-like separator 1 is made of an electrolyte-retaining polymer, for example, hexafluoropropylene-
It is a polymer-electrolyte system such as a vinylidene fluoride copolymer. The sheet-shaped positive electrode 2 is composed of an active material such as a metal oxide containing lithium, an electrolyte-retaining polymer, and a positive electrode current collector. The sheet-shaped negative electrode is, for example, an active material that stores and releases lithium ions. It is composed of a substance, an electrolyte-retaining polymer, and a negative electrode current collector.
【００２０】なお、正極２は正極集電体に、アルミニウ
ム箔片の一端を溶接・接続して正電極端子2aが、負極３
は負極集電体に、銅箔片の一端を溶接・接続して負電極
端子3aがそれぞれ配設されている。そして、これら各シ
ート状電極２，３およびシート状セパレーター１は、積
層体化して電極要素を形成している。また、前記両電極
端子2a，3aは、電極要素の一端面に沿わせ、ほぼ直角に
折り曲げられ2a′，3a′、かつリチウムポリマー電池主
面に平行な面をなして外装樹脂フィルム４，５外に封止
・導出される。The positive electrode 2 is connected to the positive electrode current collector by welding and connecting one end of an aluminum foil piece to the positive electrode terminal 2a so that the negative electrode 3
Each of the negative electrode terminals 3a is provided by welding and connecting one end of a copper foil piece to a negative electrode current collector. These sheet electrodes 2 and 3 and sheet separator 1 are laminated to form an electrode element. The two electrode terminals 2a and 3a are bent substantially at right angles along one end face of the electrode element, and are formed at 2a 'and 3a' and parallel to the main surface of the lithium polymer battery to form the outer resin films 4 and 5a. Sealed and led out.
【００２１】さらに、４，５は前記シート状電極２，３
およびシート状セパレーター１の積層体から成る電極要
素を封装する外装樹脂フィルムであり、前記正・負両電
極端子2a，3aを封止しながら、外装樹脂フィルム４，５
で形成する封装体外に導出されている。ここで、前記外
装樹脂フィルム４，５は、その周辺部重ね合わせ大部分
の領域（たとえば四辺中の三辺）を溶接ないし接着封止
し、一部の領域（たとえば四辺中の一辺）を非溶接ない
し非接着にし、この一部の領域を挟着性治具６（たとえ
ばクリップ）で、液漏れなど生じない程度に挟着封止し
てある。Further, reference numerals 4 and 5 denote the sheet electrodes 2 and 3 respectively.
And an exterior resin film for sealing an electrode element comprising a laminate of the sheet-like separator 1. The exterior resin films 4, 5 are sealed while sealing the positive and negative electrode terminals 2a, 3a.
It is led out of the sealing body formed by. Here, the exterior resin films 4 and 5 are welded or adhesively sealed in most areas (for example, three out of four sides) of the peripheral portions thereof, and some areas (for example, one side in four sides) are not sealed. Welding or non-adhesion is performed, and a part of this area is clamped and sealed with a clamping jig 6 (for example, a clip) to such an extent that liquid leakage does not occur.
【００２２】図３は、前記挟着性治具６の構成例を断面
的に示したもので、たとえばポリプロピレン樹脂板製の
本体6aに、バイトン製帯状体6bを張り合わせた構造を成
している。FIG. 3 is a cross-sectional view showing an example of the structure of the clamping jig 6, which has a structure in which a band 6b made of viton is attached to a main body 6a made of, for example, a polypropylene resin plate. .
【００２３】上記したように、電極端子2a，3aを電池要
素の端面に沿わせ、ほぼ直角に折り曲げられ2a′，3a′
て封装体外へ封止・導出したことにより、電極端子2a，
3aの延設が回避されるので、電極端子2a，3aの導出方向
の長さが短縮される。つまり、短縮した分がコンパクト
化されるし、また、短縮するスペース分を電極要素領域
として利用することによって電池容量を大きくできる。As described above, the electrode terminals 2a and 3a are bent substantially at right angles along the end faces of the battery element and are bent at 2a 'and 3a'.
The electrode terminals 2a,
Since the extension of 3a is avoided, the length of the electrode terminals 2a and 3a in the lead-out direction is reduced. That is, the shortened portion is made compact, and the battery capacity can be increased by using the shortened space as the electrode element region.
【００２４】一方、封装体を形成する外装樹脂フィルム
４，５の周辺重ね合わせ部おいては、一部の領域を除い
て大部分の領域を溶接・接着などで封止してあるが、前
記一部の領域を挟着性治具６で、液漏れなど生じない程
度挟着封止してある。したがって、一般的な条件ないし
環境で使用できるし、仮に、電極要素部を封装する電池
内部にガスが生じ、その領域のガス圧が上昇した場合
は、前記挟着封止部を介してガス漏れが行われるので、
暴発的にシート状電池が破損する恐れも解消する。 以
下具体例を説明する。On the other hand, in the peripheral overlapping portions of the exterior resin films 4 and 5 forming the sealing body, most regions except for some regions are sealed by welding / adhesion. Part of the area is sandwiched and sealed by the sandwiching jig 6 to such an extent that liquid leakage does not occur. Therefore, it can be used under general conditions or environments, and if gas is generated inside the battery that seals the electrode element portion and the gas pressure in that region increases, gas leakage occurs through the sandwiching sealing portion. Is performed, so
This eliminates the possibility that the sheet-shaped battery may be damaged suddenly. A specific example will be described below.
【００２５】実施例１ 電極活物質の塗布部面積（図１のＡ領域）52×30 m2 、
電極活物質の非塗布部面積（図１のＢ領域）15×10 m2
で、かつ前記非塗布部領域Ｂの集電体面に、リボン状電
極端子2a，3aを重ね部分 5mmで溶接し、このリボン状電
極端子2a，3aを端面に沿わせて折り曲げて成るシート状
電極シート２，３をそれぞれ用意する。一方、予め用意
しておいた電気絶縁製の多孔質セパレータ１を介して、
前記リボン状電極端子2a，3aを同一方向に引き出し、か
つシート状電極シート２，３を積層配置して電極要素を
構成する。Example 1 The area of the electrode active material coating area (A area in FIG. 1) was 52 × 30 m 2 ,
Area of non-coated part of electrode active material (region B in FIG. 1) 15 × 10 m 2
A sheet-like electrode formed by welding the ribbon-shaped electrode terminals 2a, 3a to the current collector surface in the non-coating area B at an overlapping portion of 5 mm, and bending the ribbon-shaped electrode terminals 2a, 3a along the end face. Sheets 2 and 3 are prepared. On the other hand, through a porous separator 1 made of electric insulation prepared in advance,
The electrode elements are formed by pulling out the ribbon-shaped electrode terminals 2a and 3a in the same direction and laminating and disposing the sheet-shaped electrode sheets 2 and 3.
【００２６】その後、前記端面に沿わせて折り曲げたリ
ボン状電極端子2a，3aを、電極要素主面に平行するよう
に再度折り曲げ、かつリボン状電極端子2a，3aの先端部
を20mm導出させて、この電極要素の両主面側に、91×50
m2 の気密性樹脂フィルム４，５を配置する一方、前記
電極要素に電解液を注入する。ここで、電解液は、たと
えばエチレンカーボネートおよびジメチルカーボネート
の容量比２：１の混合液に、LiPF6 が1mol/lの濃度に溶
解された非水電解液である。Thereafter, the ribbon-shaped electrode terminals 2a, 3a bent along the end face are bent again so as to be parallel to the main surface of the electrode element, and the leading ends of the ribbon-shaped electrode terminals 2a, 3a are led out by 20 mm. , 91 × 50 on both main surfaces of this electrode element
While placing the airtight resin film 4,5 of m 2, the electrolyte solution is injected into the electrode element. Here, the electrolyte is, for example, a non-aqueous electrolyte in which LiPF 6 is dissolved at a concentration of 1 mol / l in a mixture of ethylene carbonate and dimethyl carbonate at a volume ratio of 2: 1.
【００２７】次いで、樹脂フィルム４，５の重ね合わせ
部四辺中の三辺については、 9mm幅程度に接着剤を介し
て気密に封止し、他の一辺については図３に図示したよ
うな挟着性治具６で、液漏れなど生じない程度に挟着封
止してシート状のリチウムポリマー二次電池を作製し
た。Next, three sides of the four sides of the overlapped portions of the resin films 4 and 5 are hermetically sealed with an adhesive to a width of about 9 mm, and the other side is sandwiched as shown in FIG. A sheet-shaped lithium polymer secondary battery was produced by sandwiching and sealing with an adhesive jig 6 to such an extent that liquid leakage did not occur.
【００２８】上記のリチウムポリマー二次電池につい
て、0.2Cの定電流で4.5Vまで充電した後、0.2Cの定電流
で2.8Vまで放電させる充・放電サイクルを繰り返して、
充・放電時に電池内に発生するガスの影響を調べた結
果、暴発的な電池の破損は認められなかった。The charge / discharge cycle of charging the above lithium polymer secondary battery to 4.5 V at a constant current of 0.2 C and then discharging it to 2.8 V at a constant current of 0.2 C was repeated.
As a result of examining the influence of gas generated in the battery at the time of charging and discharging, no violent battery damage was found.
【００２９】実施例２ 上記実施例１において、電極要素の両主面側に配置し、
電極要素を封装する気密性樹脂フィルム４，５の寸法・
大きさを66×50 m2 とした他は、実施例１の場合と同じ
条件でシート状のリチウムポリマー二次電池を作製し
た。そして、このシート状のリチウムポリマー二次電池
について、実施例１の場合と同じ条件で充・放電サイク
ル試験を行ったところ、同様の結果が得られた。Embodiment 2 In the above-described embodiment 1, the electrode elements are arranged on both main surface sides,
The dimensions of the airtight resin films 4 and 5 that seal the electrode elements
A sheet-shaped lithium polymer secondary battery was produced under the same conditions as in Example 1 except that the size was set to 66 × 50 m 2 . Then, when a charge / discharge cycle test was performed on the sheet-shaped lithium polymer secondary battery under the same conditions as in Example 1, similar results were obtained.
【００３０】比較例 上記実施例１において、リボン状電極端子2a，3aを端面
に沿わせて折り曲げずに、また、外装用樹脂フィルム
４，５の寸法・大きさを97×50 m2 とし、さらに、外装
用樹脂フィルム４，５の周辺重ね合わせ部の全てを接着
剤で接着封止した他は、実施例１の場合と同じ条件でシ
ート状のリチウムポリマー二次電池を作製した。そし
て、このシート状のリチウムポリマー二次電池につい
て、実施例１の場合と同じ条件で充・放電サイクル試験
を行ったところ、ガス圧の上昇によって暴発的な損傷を
起こした。COMPARATIVE EXAMPLE In the first embodiment, the ribbon-shaped electrode terminals 2a and 3a were not bent along the end faces, and the dimensions and size of the exterior resin films 4 and 5 were 97 × 50 m 2 . Further, a sheet-shaped lithium polymer secondary battery was manufactured under the same conditions as in Example 1 except that all of the peripheral overlapping portions of the exterior resin films 4 and 5 were bonded and sealed with an adhesive. When a charge / discharge cycle test was performed on the sheet-shaped lithium polymer secondary battery under the same conditions as in Example 1, sudden damage was caused by an increase in gas pressure.
【００３１】上記実施例および比較例に係るシート状の
リチウムポリマー二次電池の全長、充・放電サイクルに
よる電池の状態など比較し易いように表１にまとめて示
す。Table 1 collectively shows the overall length of the sheet-shaped lithium polymer secondary batteries according to the above Examples and Comparative Examples, the state of the batteries by charge / discharge cycles, and the like for easy comparison.
【表１】 なお、本発明は上記例示に限定されるものでなく、発明
の趣旨を逸脱しない範囲でいろいろの変形を採ることが
できる。たとえばリチウムポリマー二次電池以外のシー
ト状電池、これら電極要素の構成材料、外装樹脂フィル
ムの材質、形状・寸法など、特に限定されるものでな
く、従来知られている材質などはいずれも使用できる。[Table 1] It should be noted that the present invention is not limited to the above examples, and various modifications can be made without departing from the spirit of the invention. For example, sheet batteries other than lithium polymer secondary batteries, constituent materials of these electrode elements, materials and shapes and dimensions of the exterior resin films are not particularly limited, and any conventionally known materials can be used. .
【００３２】[0032]
【発明の効果】請求項１の発明によれば、シート状電池
の電極端子を封止・導出する領域辺の平面積が低減化さ
れるため、その低減部分の小形化を図ることができる。
あるいは、前記低減化領域に対応して、電極要素を大き
く設定できるので、その分、電池の大容量化を図ること
ができる。また、外装樹脂フィルムの重ね合わせ封止部
の一部は、電池内におけるガス圧が一定圧を超えると放
出できる構造と成っているので、暴発など回避できる電
池の提供が可能となる。According to the first aspect of the present invention, since the plane area of the region for sealing and leading the electrode terminals of the sheet-shaped battery is reduced, the reduced portion can be reduced in size.
Alternatively, since the electrode element can be set large in accordance with the reduced area, the capacity of the battery can be increased accordingly. In addition, since a part of the overlap sealing portion of the exterior resin film has a structure that can release the gas when the gas pressure in the battery exceeds a certain pressure, it is possible to provide a battery that can avoid violence.
【００３３】請求項２の発明によれば、リチウムポリマ
ー電池の電極端子を封止・導出する領域辺の平面積が低
減化されるため、その低減部分の小形化を図ることがで
きる。あるいは、前記低減化領域に対応して、電極要素
を大きく設定できるので、その分、リチウムポリマー電
池の大容量化を図ることができる。また、外装樹脂フィ
ルムの重ね合わせ封止部の一部は、電池内におけるガス
圧が一定圧を超えると放出できる構造と成っているの
で、暴発など回避できるリチウムポリマー電池の提供が
可能となる。According to the second aspect of the present invention, the flat area of the side of the region where the electrode terminal of the lithium polymer battery is sealed and led out is reduced, so that the reduced portion can be reduced in size. Alternatively, the electrode element can be set large in accordance with the reduced area, so that the capacity of the lithium polymer battery can be increased accordingly. In addition, since a part of the overlapping sealing portion of the exterior resin film has a structure that can be released when the gas pressure in the battery exceeds a certain pressure, it is possible to provide a lithium polymer battery that can avoid violence and the like.
【００３４】さらに、両発明によれば、外装樹脂フィル
ムから導出される電極端子が振動などによる断線も起こ
り難くなるので、信頼性の高い電池の提供ともなる。Further, according to the two inventions, the electrode terminals derived from the exterior resin film are less likely to be disconnected due to vibration or the like, so that a highly reliable battery can be provided.
【図１】実施例のリチウムポリマー電池の要部構成を一
部切り欠いて示す平面図。FIG. 1 is a plan view showing a main part of a lithium polymer battery according to an embodiment with a part cut away.
【図２】図１の A-A線に沿って切断したた断面構造を示
す断面図。FIG. 2 is a sectional view showing a sectional structure taken along line AA in FIG. 1;
【図３】実施例のリチウムポリマー電池の構成に使用し
た挟着性治具の構成を示す断面図。FIG. 3 is a cross-sectional view showing the configuration of a clamping jig used in the configuration of the lithium polymer battery of the embodiment.
【図４】従来のリチウムポリマー電池の要部構成を示す
断面図。FIG. 4 is a cross-sectional view showing a configuration of a main part of a conventional lithium polymer battery.
１……セパレーター ２……シート状の正極 2a……正極電極端子 2a′，3a′……折り曲げ ３……シート状の負極 3a……負極電極端子 ４，５……外装樹脂フィルム ６……挟着性治具（クリップ） DESCRIPTION OF SYMBOLS 1 ... Separator 2 ... Sheet-shaped positive electrode 2a ... Positive electrode terminal 2a ', 3a' ... Bending 3 ... Sheet-shaped negative electrode 3a ... Negative electrode terminal 4, 5 ... Outer resin film 6 ... Nipping Wearable jig (clip)
Claims (2)
担持するシート状セパレーターと、 前記シート状セパレーター主面に積層・配置された負極
集電体を有するシート状負極と、 前記シート状電極およびシート状セパレーターの積層体
から成る電極要素を封装する外装樹脂フィルムと、 前記シート状電極の集電体に一端がそれぞれ接続し、電
極要素の端面に沿わせて折り曲げられ、かつ電池主面に
平行して同一面を成して他端が外装樹脂フィルム外に封
止・導出された正・負両電極端子とを有するシート状電
池であって、 前記外装樹脂フィルムの周辺重ね合わせ封止部の一部が
挟着性治具で、挟着封止されていることを特徴とするシ
ート状電池。1. A sheet-like positive electrode having a positive electrode current collector, a sheet-like separator laminated and arranged on the main surface of the sheet-like positive electrode and carrying an electrolytic solution, and a sheet-like separator laminated and arranged on the main surface of the sheet-like separator. A sheet-shaped negative electrode having a negative electrode current collector, an exterior resin film for sealing an electrode element formed of a laminate of the sheet-shaped electrode and the sheet-shaped separator, and one end connected to the current collector of the sheet-shaped electrode, A sheet-like sheet having both positive and negative electrode terminals bent along the end faces of the electrode elements and formed on the same plane in parallel with the main surface of the battery and the other end is sealed and led out of the exterior resin film. A sheet-shaped battery, wherein a part of a peripheral overlapping sealing portion of the exterior resin film is sandwiched and sealed by a sandwiching jig.
かつ正極集電体を有するシート状正極と、 前記シート状正極主面に積層・配置され、かつ電解液を
担持するシート状セパレーターと、 前記シート状セパレーター主面に積層・配置されたリチ
ウム金属もしくはリチウムを吸蔵・放出する炭素質材を
活物質とし、かつ負極集電体を有するシート状負極と、 前記シート状電極およびシート状セパレーターの積層体
から成る電極要素を封装する外装樹脂フィルムと、 前記シート状電極の集電体に一端がそれぞれ接続し、電
極要素の端面に沿わせて折り曲げられ、かつ電池主面に
平行して同一面を成して他端が外装樹脂フィルム外に封
止・導出された正・負両電極端子とを有するリチウムポ
リマー電池であって、 前記外装樹脂フィルムの周辺重ね合わせ封止部の一部が
挟着性治具で、挟着封止されていることを特徴とするリ
チウムポリマー電池。2. A lithium-containing metal oxide as an active material,
And a sheet-like positive electrode having a positive electrode current collector; a sheet-like separator laminated and arranged on the main surface of the sheet-like positive electrode, and carrying a liquid electrolyte; and a lithium metal laminated and arranged on the main surface of the sheet-like separator or A sheet-shaped negative electrode having a carbonaceous material that occludes and releases lithium as an active material, and having a negative electrode current collector; an exterior resin film that seals an electrode element formed of a laminate of the sheet-shaped electrode and the sheet-shaped separator; One end is connected to the current collector of the sheet-like electrode, and is bent along the end face of the electrode element, and forms the same plane parallel to the main surface of the battery, and the other end is sealed outside the exterior resin film. A lithium polymer battery having the derived positive and negative electrode terminals, wherein a part of the peripheral overlapping sealing portion of the exterior resin film is sandwiched and sealed by a sandwiching jig. Lithium polymer battery, characterized in that there.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9318101A JPH11154495A (en) | 1997-11-19 | 1997-11-19 | Sheet-like battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9318101A JPH11154495A (en) | 1997-11-19 | 1997-11-19 | Sheet-like battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11154495A true JPH11154495A (en) | 1999-06-08 |
Family
ID=18095508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9318101A Withdrawn JPH11154495A (en) | 1997-11-19 | 1997-11-19 | Sheet-like battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11154495A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015173686A1 (en) * | 2014-05-16 | 2015-11-19 | Semiconductor Energy Laboratory Co., Ltd. | Electronic device with secondary battery |
| JP2016189345A (en) * | 2014-05-29 | 2016-11-04 | 株式会社半導体エネルギー研究所 | Secondary battery |
-
1997
- 1997-11-19 JP JP9318101A patent/JPH11154495A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015173686A1 (en) * | 2014-05-16 | 2015-11-19 | Semiconductor Energy Laboratory Co., Ltd. | Electronic device with secondary battery |
| US9640831B2 (en) | 2014-05-16 | 2017-05-02 | Semiconductor Energy Laboratory Co., Ltd. | Electronic device with secondary battery |
| US10056578B2 (en) | 2014-05-16 | 2018-08-21 | Semiconductor Energy Laboratory Co., Ltd. | Electronic device with secondary battery |
| JP2016189345A (en) * | 2014-05-29 | 2016-11-04 | 株式会社半導体エネルギー研究所 | Secondary battery |
| US10714784B2 (en) | 2014-05-29 | 2020-07-14 | Semiconductor Energy Laboratory Co., Ltd. | Secondary battery and electronic device |
| US11444311B2 (en) | 2014-05-29 | 2022-09-13 | Semiconductor Energy Laboratory Co., Ltd. | Secondary battery and electronic device |
| US11949061B2 (en) | 2014-05-29 | 2024-04-02 | Semiconductor Energy Laboratory Co., Ltd. | Secondary battery and electronic device |
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