JP2001068071A - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JP2001068071A JP2001068071A JP23695699A JP23695699A JP2001068071A JP 2001068071 A JP2001068071 A JP 2001068071A JP 23695699 A JP23695699 A JP 23695699A JP 23695699 A JP23695699 A JP 23695699A JP 2001068071 A JP2001068071 A JP 2001068071A
- Authority
- JP
- Japan
- Prior art keywords
- metal foil
- foil package
- negative electrode
- resin film
- positive electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は密閉式電池に関する
ものであり、特に金属箔パッケージによって密閉された
密閉式電池に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery, and more particularly to a sealed battery sealed by a metal foil package.
【０００２】[0002]
【従来の技術】近年、電子技術の大きな進歩により、一
般ユーザー向けの携帯機器の小型軽量化が進んでいる。
それに伴い、電池に対しても小型軽量化の要求が高まっ
ている。また、環境保全の観点から、電池に対するリサ
イクルの要求も高まっている。電池のパッケージの面か
ら小型軽量化の動きをみると、例えば非水電解液系の密
閉式電池では、成型品の場合、それまでの鉄、ステンレ
ス鋼等の重い材質を用いた電槽から、アルミニウム等の
軽い材質を用いた電槽への転換がある。さらに最近で
は、アルミニウム箔を芯材としてその両面に合成樹脂層
を配したラミネートフィルムを用いる動きがある。2. Description of the Related Art In recent years, with the great progress in electronic technology, portable devices for general users have been reduced in size and weight.
Accordingly, there is an increasing demand for smaller and lighter batteries. Also, from the viewpoint of environmental protection, the demand for recycling of batteries is increasing. Looking at the trend toward smaller and lighter batteries from the perspective of battery packaging, for example, in the case of non-aqueous electrolyte sealed batteries, in the case of molded products, the battery case using heavy materials such as iron, stainless steel, etc. There is conversion to a battery case using a light material such as aluminum. More recently, there has been a movement to use a laminate film having an aluminum foil as a core material and a synthetic resin layer disposed on both sides thereof.
【０００３】一方、リサイクルに関しては、電池の設計
面でリサイクルが容易な構造や材質を選ぶための工夫が
望まれるが、まだ具体的な試みが無いのが現状である。[0003] On the other hand, in terms of recycling, it is desired to devise a structure and a material which can be easily recycled in terms of battery design, but at present, there is no concrete attempt.
【０００４】上記成型品の場合、密閉機能については長
期信頼性に優れるものの、重い、絞り加工技術の限界か
ら大きなものができずサイズの制約を受ける、成型金型
代が高く成型工程も多いことからコストが嵩む、分解が
困難でリサイクルに適さない、といった問題点があっ
た。[0004] In the case of the above-mentioned molded product, although the sealing function is excellent in long-term reliability, it is heavy, it cannot be made large due to the limit of drawing technology, and its size is limited. However, there is a problem that the cost is increased, the decomposition is difficult, and the material is not suitable for recycling.
【０００５】また、ラミネートフィルムの場合は軽量で
サイズの自由度が高いという利点があるが、機械的強度
が弱い、パッケージが損傷を受けやすい、１００℃を超
える高温にさらされると、電池の内圧の上昇に伴い、パ
ッケージフィルムに張力がかかり、樹脂シールが破れ
る、といった欠点があった。またラミネート構成材であ
る金属箔と樹脂フィルムの分離が困難であり、リサイク
ルに適さない問題点があった。A laminate film has the advantages of being lightweight and having a high degree of freedom in size, but has a low mechanical strength, is susceptible to damage to the package, and has a high internal pressure when exposed to a high temperature exceeding 100 ° C. As a result, the package film has a drawback that tension is applied to the package film and the resin seal is broken. Further, it is difficult to separate a metal foil and a resin film, which are laminated components, and there is a problem that it is not suitable for recycling.
【０００６】これに対して特開平１０―３２４３０４号
には、ラミネートフィルムの開口端部の樹脂層を除去
し、金属同士を溶接シールする方式が提案されている。
しかし、この方式では、ラミネートフィルムに関する上
記問題点のうち、耐高温性には優れるが、それ以外の問
題点を解決するものではなかった。On the other hand, Japanese Patent Application Laid-Open No. Hei 10-324304 proposes a method in which a resin layer at an opening end of a laminate film is removed and metals are welded and sealed.
However, in this method, among the above-mentioned problems relating to the laminate film, high temperature resistance is excellent, but other problems have not been solved.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、上記問題点
に鑑み、なされたものであり、従来電池では両立が困難
であった、軽量、形状サイズの自由度、長期信頼性、安
価、リサイクル適合性を両立させた電池を提供するもの
である。DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in light of the difficulty in achieving compatibility with conventional batteries. It is an object of the present invention to provide a battery having both compatibility.
【０００８】[0008]
【課題を解決するための手段】本発明は前記課題を解決
するため、樹脂フィルムにより包装した発電要素を金属
箔パッケージで覆って密閉し、該発電要素の正極及び負
極のいずれか一方を該金属箔パッケージと電気的に接続
した密閉式電池である。また、正極及び負極のいずれか
一方が電気絶縁性フィラー含有合成樹脂からなる絶縁層
を介して金属箔パッケージと電気的に絶縁されているこ
とを特徴とする密閉式電池である。According to the present invention, in order to solve the above-mentioned problems, a power generating element wrapped with a resin film is covered with a metal foil package and hermetically sealed, and one of a positive electrode and a negative electrode of the power generating element is sealed with the metal. A sealed battery electrically connected to a foil package. Further, the sealed battery is characterized in that one of the positive electrode and the negative electrode is electrically insulated from the metal foil package via an insulating layer made of a synthetic resin containing an electrically insulating filler.
【０００９】[0009]
【発明の実施の形態】以下、本発明を実施例に基づき説
明する。各構成要素の材質、寸法等については、これら
の記述に限定されるものではない。図１は、本発明の実
施の一形態を示す図である。正極１、負極２、セパレー
タ３で構成される発電要素は、それぞれ電解液を含有
し、樹脂フィルム６内に仮封止されている。４は正極端
子である。負極リード５は、負極端子を兼ねる金属箔パ
ッケージ７と電気的に接続されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments. The materials, dimensions, and the like of each component are not limited to these descriptions. FIG. 1 is a diagram showing an embodiment of the present invention. The power generating elements composed of the positive electrode 1, the negative electrode 2, and the separator 3 each contain an electrolytic solution and are temporarily sealed in the resin film 6. 4 is a positive electrode terminal. The negative electrode lead 5 is electrically connected to a metal foil package 7 also serving as a negative electrode terminal.
【００１０】樹脂フィルム６の材質は、融着が可能で、
電極や電解液と接触しても変質しないものが要求され
る。非水電解質電池の場合、具体的にはポリプロピレン
やポリエチレンが好適である。ポリプロピレンを用いた
場合、樹脂フィルム６の厚さは、２０〜１００μｍが好
適である。前記厚さが２０μｍ未満であれば、仮封止状
態において電解液を含有した状態の発電要素を取り扱う
ことが物理的に困難であり、工程途中で放置された場
合、電解液の蒸発と工程雰囲気からの水分の侵入を起こ
しやすい。１００μｍを超えると、電池のエネルギー密
度を下げる原因となり、好ましくない。The material of the resin film 6 can be fused.
A material that does not deteriorate even when it comes into contact with an electrode or an electrolytic solution is required. In the case of a non-aqueous electrolyte battery, specifically, polypropylene and polyethylene are preferred. When polypropylene is used, the thickness of the resin film 6 is preferably 20 to 100 μm. If the thickness is less than 20 μm, it is physically difficult to handle the power generation element containing the electrolyte in the temporarily sealed state, and if left unattended during the process, the evaporation of the electrolyte and the process atmosphere Easily invaded by water from If the thickness exceeds 100 μm, the energy density of the battery is lowered, which is not preferable.
【００１１】金属箔パッケージ７の材質は、溶接が容易
であり、耐錆性が良く、電位安定性が高く、機械的強度
が高いものが要求される。パッケージが負極と接続され
る場合、その材質はニッケル、またはステンレス鋼が好
適であり、厚さは１０〜５０μｍが適当である。一方、
パッケージが正極と接続される場合、その材質はアルミ
ニウム、アルミニウムを内面に配したニッケルとの貼り
合わせ材、またはアルミニウムを内面に配したステンレ
ス鋼との貼り合わせ材が好適である。アルミニウム箔の
場合、厚さは５０〜２００μｍが好ましい。貼り合わせ
材の場合、トータル厚さは２０〜６０μｍが好ましい。The material of the metal foil package 7 is required to be easy to weld, have good rust resistance, high potential stability, and high mechanical strength. When the package is connected to the negative electrode, the material is preferably nickel or stainless steel, and the thickness is suitably 10 to 50 μm. on the other hand,
When the package is connected to the positive electrode, the material is preferably aluminum, a bonding material with nickel having aluminum disposed on the inner surface, or a bonding material with stainless steel having aluminum disposed on the inner surface. In the case of aluminum foil, the thickness is preferably 50 to 200 μm. In the case of a bonding material, the total thickness is preferably 20 to 60 μm.
【００１２】金属箔パッケージ７の接合は、電解液の蒸
発や水分の侵入を避けるため、樹脂層を介した接合より
も金属同士の接合が望ましい。本実施例では、正極端子
４の貫通部を有する開口端のみ樹脂接合とし、他の開口
端は金属接合とした。内容物を高温から保護するため、
溶接方法は、例えば抵抗溶接、レーザー溶接、超音波溶
接等の局部加熱が好ましい。The metal foil package 7 is preferably bonded to metals rather than via a resin layer in order to avoid evaporation of the electrolyte and intrusion of moisture. In this embodiment, only the opening end having the penetrating portion of the positive electrode terminal 4 is resin-bonded, and the other opening ends are metal-bonded. To protect the contents from high temperatures,
As the welding method, for example, local heating such as resistance welding, laser welding, or ultrasonic welding is preferable.
【００１３】樹脂接合部分の絶縁層８は、電解液の蒸発
や水分の侵入を避けるため、電気絶縁性フィラー含有融
着性合成樹脂を用いることが望ましい。絶縁層８と端子
４および絶縁層８と金属箔パッケージ７との接合は熱融
着である。絶縁層８の厚さは２０〜５０μｍが好適であ
る。２０μｍより薄いと、融着時に絶縁が破壊されやす
く、５０μｍより厚いと、絶縁層からの水分の浸入が問
題となることがある。本接合部は、電池内圧が高まった
時の圧力解放弁の役目を果たす。開口端の大部分が金属
同士の溶接によって接合されているので、高温にさらさ
れた場合に張力が加わっても、シールが破壊されること
がない。It is desirable that the insulating layer 8 at the resin-joined portion is made of an electrically insulating filler-containing fusible synthetic resin in order to avoid evaporation of the electrolytic solution and penetration of moisture. The bonding between the insulating layer 8 and the terminal 4 and the bonding between the insulating layer 8 and the metal foil package 7 are heat fusion. The thickness of the insulating layer 8 is preferably 20 to 50 μm. When the thickness is less than 20 μm, insulation is easily broken at the time of fusion, and when the thickness is more than 50 μm, intrusion of moisture from the insulating layer may become a problem. This junction serves as a pressure relief valve when the battery internal pressure increases. Most of the open ends are joined by metal-to-metal welding, so that the seal is not broken even if tension is applied when exposed to high temperatures.
【００１４】図２に、上記電池の平面図を示した。ここ
で、斜線を付けた部分９は熱融着されている部分を示
し、影を付けた部分１０は金属接合されている部分を示
している。FIG. 2 is a plan view of the battery. Here, a hatched portion 9 indicates a portion which is thermally fused, and a shaded portion 10 indicates a portion which is metal-joined.
【００１５】上記の実施例では、負極が金属箔パッケー
ジと電気的に接続され、正極が電気的に絶縁された例を
示したが、正極が金属箔パッケージと電気的に接続さ
れ、負極が電気的に絶縁された方式を採用してもよい。In the above embodiment, the negative electrode is electrically connected to the metal foil package, and the positive electrode is electrically insulated. However, the positive electrode is electrically connected to the metal foil package, and the negative electrode is electrically connected. A system that is electrically insulated may be employed.
【００１６】本発明による構造の密閉電池は、小型軽量
であり、部品のサイズが自由なためサイズの制約を受け
ず、部品が安価である利点がある。また、従来のラミネ
ートフィルムに比べ、パッケージの機械的強度が大きい
こと、金属溶接という信頼性の高いシール方式を採用し
ているため長期の密閉の信頼性が高い、といった利点が
ある。さらに、成型品に比べ分解が容易なこと、ラミネ
ートフィルムと異なり、樹脂と金属が分離していること
などリサイクル適合性にも優れている。The sealed battery having the structure according to the present invention has the advantages that it is small and lightweight, and the size of the parts is free, so that the size is not restricted and the parts are inexpensive. In addition, there is an advantage that the mechanical strength of the package is higher than that of the conventional laminated film, and the long-term sealing reliability is high because a highly reliable sealing method of metal welding is employed. Furthermore, it is excellent in recyclability, such as being easily disassembled as compared to molded products and being separated from resin and metal, unlike a laminated film.
【００１７】[0017]
【発明の効果】以上詳述したように、本発明は、サイズ
の自由度が高く、長期信頼性に優れ、リサイクル適合性
に優れた密閉型電池を安価に提供することができるの
で、工業的価値は極めて大である。As described above in detail, the present invention can provide an inexpensive sealed battery having high flexibility in size, excellent long-term reliability, and excellent recyclability. The value is enormous.
【図１】本発明の密閉式電池の断面図であるFIG. 1 is a sectional view of a sealed battery according to the present invention.
１ 正極 ２ 負極 ６ 樹脂フィルム ７ 金属箔パッケージ ８ 絶縁層 DESCRIPTION OF SYMBOLS 1 Positive electrode 2 Negative electrode 6 Resin film 7 Metal foil package 8 Insulation layer
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１１年９月１６日（１９９９．９．１
６）[Submission Date] September 16, 1999 (1999.9.1)
6)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Correction target item name] Brief description of drawings
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の密閉式電池の断面図であるFIG. 1 is a sectional view of a sealed battery according to the present invention.
【図２】本発明の密閉式電池の平面図であるFIG. 2 is a plan view of the sealed battery of the present invention.
【符号の説明】 １ 正極 ２ 負極 ６ 樹脂フィルム ７ 金属箔パッケージ ８ 絶縁層[Description of Signs] 1 Positive electrode 2 Negative electrode 6 Resin film 7 Metal foil package 8 Insulating layer
Claims (2)
金属箔パッケージで覆って密閉し、該発電要素の正極及
び負極のいずれか一方を該金属箔パッケージと電気的に
接続した密閉式電池。1. A sealed battery in which a power generation element packaged with a resin film is covered and sealed with a metal foil package, and one of a positive electrode and a negative electrode of the power generation element is electrically connected to the metal foil package.
性フィラー含有合成樹脂からなる絶縁層を介して金属箔
パッケージと電気的に絶縁されていることを特徴とする
請求項１記載の密閉式電池。2. The sealed type according to claim 1, wherein one of the positive electrode and the negative electrode is electrically insulated from the metal foil package via an insulating layer made of an electrically insulating filler-containing synthetic resin. battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23695699A JP2001068071A (en) | 1999-08-24 | 1999-08-24 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23695699A JP2001068071A (en) | 1999-08-24 | 1999-08-24 | Sealed battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001068071A true JP2001068071A (en) | 2001-03-16 |
Family
ID=17008265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23695699A Pending JP2001068071A (en) | 1999-08-24 | 1999-08-24 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001068071A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003007266A (en) * | 2001-06-25 | 2003-01-10 | Toyota Motor Corp | Sealing structure for electrode body |
| KR100768178B1 (en) * | 2001-10-13 | 2007-10-17 | 삼성에스디아이 주식회사 | Lithium secondary battery |
| KR100818206B1 (en) * | 2006-08-10 | 2008-03-31 | (주)비피에스 | Method of making battery using as case with aluminium foil |
| JP2009543317A (en) * | 2006-07-10 | 2009-12-03 | エルジー・ケム・リミテッド | Safety kit for secondary battery |
-
1999
- 1999-08-24 JP JP23695699A patent/JP2001068071A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003007266A (en) * | 2001-06-25 | 2003-01-10 | Toyota Motor Corp | Sealing structure for electrode body |
| JP4639538B2 (en) * | 2001-06-25 | 2011-02-23 | トヨタ自動車株式会社 | Sealing structure of electrode body |
| KR100768178B1 (en) * | 2001-10-13 | 2007-10-17 | 삼성에스디아이 주식회사 | Lithium secondary battery |
| JP2009543317A (en) * | 2006-07-10 | 2009-12-03 | エルジー・ケム・リミテッド | Safety kit for secondary battery |
| KR100818206B1 (en) * | 2006-08-10 | 2008-03-31 | (주)비피에스 | Method of making battery using as case with aluminium foil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7410723B2 (en) | Pouch type secondary battery | |
| US8389152B2 (en) | Pouch type polymer battery pack | |
| JP5248069B2 (en) | Pouch type secondary battery | |
| JP4609432B2 (en) | Lead terminal for power storage device with fuse and non-aqueous electrolyte power storage device | |
| KR100601577B1 (en) | Rechargeable battery | |
| US20060093922A1 (en) | Composite material tape for lithium secondary battery and lithium secondary battery using the same | |
| US6048639A (en) | Thin type sealed cell and producing method thereof | |
| KR100778982B1 (en) | Pouch case and pouch type secondary battery employing the same | |
| JPH11176400A (en) | Battery case | |
| JP2008021634A (en) | Secondary battery with security of sealing part improved | |
| JPH1055792A (en) | Thin battery | |
| JP2004247244A (en) | Laminated battery, joint terminal, battery pack, and manufacturing method of battery pack | |
| JP3931983B2 (en) | Structure of electric lead part, electric device having the lead part structure, battery and assembled battery | |
| JP2000077042A (en) | Case of lithium secondary battery | |
| JPH1167190A (en) | Thermal fuse and lithium secondary battery provided therewith | |
| JP2001068071A (en) | Sealed battery | |
| WO2005101546A1 (en) | Laminate-type cell, joining terminal, battery set, and process for producing battery set | |
| JP2006228591A (en) | Nonaqueous electrolyte secondary battery | |
| JP4154456B2 (en) | Battery device with lithium ion battery | |
| KR101546002B1 (en) | electrochemical energy storage device | |
| JP7275096B2 (en) | film type battery | |
| JP2005108633A (en) | Heat bonding method of laminated film, manufacturing method of film-packaged battery, and heat bonding device for laminated film | |
| KR20170052547A (en) | Battery | |
| KR102384007B1 (en) | Pouch Type Secondary Battery And Method For Preparing The Same | |
| JP2001084971A (en) | Sealed battery and manufacturing method thereof |