JP2007194064A - Sealed battery - Google Patents

Sealed battery Download PDF

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JP2007194064A
JP2007194064A JP2006010805A JP2006010805A JP2007194064A JP 2007194064 A JP2007194064 A JP 2007194064A JP 2006010805 A JP2006010805 A JP 2006010805A JP 2006010805 A JP2006010805 A JP 2006010805A JP 2007194064 A JP2007194064 A JP 2007194064A
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battery
output terminal
lid
positive electrode
negative electrode
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Takashi Kimura
孝史 木村
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Maxell Holdings Ltd
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Hitachi Maxell Ltd
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    • 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

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Abstract

<P>PROBLEM TO BE SOLVED: To prevent an internal short circuit between a cover and an output terminal caused by lithium metal even if the lithium metal deposits on the inner surface or the output terminal. <P>SOLUTION: A sealed battery contains a cylindrical battery can 1 with bottom whose top is opened, an electrode body 2 having a positive electrode 11, a negative electrode 12 and housed in the battery can 1, the cover 3 for sealing the opening top of the battery can 1, and an output terminal 7 fit to the cover 3 through an insulating gasket 6 so as to pass through the cover 3. A positive current collecting lead 15 drawn out of the positive electrode 11 is connected to the output terminal 7. The lower part of the output terminal 7 exposed to the inside of a battery is covered with insulating coating 21 such as UV curing resin. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、負極活物質としてリチウム金属またはリチウム合金を用いたリチウム一次電池などの密閉型電池に関する。   The present invention relates to a sealed battery such as a lithium primary battery using lithium metal or a lithium alloy as a negative electrode active material.

前記リチウム一次電池においては、特許文献１に示すごとく、正極と負極との間にセパレータを介在させた状態で渦巻状に巻回して電極体を形成し、その電極体を電池缶内に収容して蓋で密閉する構造が知られている。   In the lithium primary battery, as shown in Patent Document 1, an electrode body is formed by spirally winding a separator between a positive electrode and a negative electrode, and the electrode body is accommodated in a battery can. A structure that is sealed with a lid is known.

前記リチウム一次電池では、前記蓋に対して、出力端子が絶縁ガスケットを介して貫通状に取り付けられており、集電リードによって電極体の正極が出力端子に接続されることで、出力端子が正極の電位になっている。電極体の負極は、電池缶の内面に接続されていて、電池缶を介して蓋が負極の電位になっている。   In the lithium primary battery, the output terminal is attached in a penetrating manner to the lid through an insulating gasket, and the positive electrode of the electrode body is connected to the output terminal by a current collecting lead, so that the output terminal is positive. The potential is. The negative electrode of the electrode body is connected to the inner surface of the battery can, and the lid is at the negative potential through the battery can.

この種のリチウム一次電池は、アルカリ電池などと比べて、高エネルギー密度であって長期間の使用ができることから、その需要がますます増えるとともに、その用途も広がっている。   This type of lithium primary battery has a higher energy density and can be used for a long period of time as compared with an alkaline battery and the like.

特開平１−２３９７６９号公報（第１図）JP-A-1-239769 (FIG. 1) 特開平５−４１２４８号公報（図１）Japanese Patent Laid-Open No. 5-41248 (FIG. 1) 特開平５−１０９４３５号公報（図１）Japanese Patent Laid-Open No. 5-109435 (FIG. 1)

前記リチウム一次電池では、誤って充電されると、本来の放電電流とは逆方向に電流が流れる。また、放電容量が少なくなった古い電池と新品の電池とを混ぜて使用すると、新品の電池から古い電池へ本来の放電電流とは逆方向に電流が流れる。これらの場合、負極の電位となる蓋の内面などに微粒子状のリチウム金属が析出し、このリチウム金属が成長して出力端子に接触し、内部短絡が生じることがある。   In the lithium primary battery, when it is accidentally charged, a current flows in a direction opposite to the original discharge current. Further, when an old battery having a reduced discharge capacity and a new battery are mixed and used, a current flows from the new battery to the old battery in a direction opposite to the original discharge current. In these cases, fine lithium metal may be deposited on the inner surface of the lid that becomes the potential of the negative electrode, and the lithium metal may grow and contact the output terminal, causing an internal short circuit.

前記リチウム金属の析出に起因する内部短絡の防止手段が、特許文献１〜３に開示されている。ところが、特許文献１では、電極体の外周全面および下面周辺部と、電池缶の内面との短絡を絶縁フィルムで防ぐだけである。特許文献２では、リチウム金属がセパレータを乗り越えて正極に短絡することを隔離板で防ぐだけであり、特許文献３では、リチウム金属がセパレータを乗り越えることを絶縁性物質で防ぐだけである。   Patent Documents 1 to 3 disclose means for preventing an internal short circuit caused by the deposition of lithium metal. However, in Patent Document 1, the short circuit between the entire outer periphery and lower surface periphery of the electrode body and the inner surface of the battery can is prevented only by the insulating film. In patent document 2, it is only prevented with a separator that a lithium metal gets over a separator and short-circuits to a positive electrode, and patent document 3 only prevents a lithium metal from getting over a separator with an insulating substance.

つまり、特許文献１〜３では、負極の電位となる蓋の内面にリチウム金属が析出することには着目されておらず、蓋の内面に析出したリチウム金属が出力端子に接触して内部短絡することを防止できないところに問題がある。   That is, Patent Documents 1 to 3 do not pay attention to the deposition of lithium metal on the inner surface of the lid, which is the potential of the negative electrode, and the lithium metal deposited on the inner surface of the lid contacts the output terminal and causes an internal short circuit. There is a problem where this cannot be prevented.

また、電極体の負極を出力端子に接続し、電極体の正極を電池缶の内面に接続した電池では、出力端子の下部にリチウム金属が析出するため、この電池でも前記リチウム金属によって蓋の内面と出力端子とが内部短絡するおそれがある。   Further, in a battery in which the negative electrode of the electrode body is connected to the output terminal and the positive electrode of the electrode body is connected to the inner surface of the battery can, lithium metal is deposited below the output terminal. And the output terminal may be internally short-circuited.

そこで本発明の目的は、蓋の内面や出力端子にリチウム金属が析出しても、そのリチウム金属で蓋と出力端子とが内部短絡することがない密閉型電池を提供することにある。   Accordingly, an object of the present invention is to provide a sealed battery in which, even if lithium metal is deposited on the inner surface of the lid or the output terminal, the lid and the output terminal are not internally short-circuited by the lithium metal.

本発明が対象とする密閉型電池は、図２に示すごとく、上面が開口する有底筒形状の電池缶１と、正極１１と負極１２とを有して電池缶１内に収容される電極体２と、電池缶１の開口上面を塞ぐ蓋３と、蓋３に対して絶縁ガスケット６を介して貫通状に取り付けられる出力端子７とを含む。   As shown in FIG. 2, the sealed battery targeted by the present invention has a bottomed cylindrical battery can 1 having an open top, a positive electrode 11, and a negative electrode 12, and is an electrode accommodated in the battery can 1. It includes a body 2, a lid 3 that closes the upper surface of the battery can 1, and an output terminal 7 that is attached to the lid 3 through an insulating gasket 6 in a penetrating manner.

本発明は、図１に示すごとく、正極１１および負極１２のいずれか一方の電極１１から導出された集電リード１５が出力端子７に接続されており、電池内に露出する出力端子７の下部と蓋３の内面とのうち、少なくとも一方が絶縁材で被覆されている。   In the present invention, as shown in FIG. 1, the current collecting lead 15 led out from one of the positive electrode 11 and the negative electrode 12 is connected to the output terminal 7, and the lower part of the output terminal 7 exposed in the battery is shown. And at least one of the inner surface of the lid 3 is covered with an insulating material.

ここでの絶縁材には、絶縁性塗料２１や絶縁テープなどが該当し、絶縁材の材料としては、ＵＶ硬化樹脂や、ゴム系樹脂や、フッ化ビニリデン（ＰＶＤＦ）樹脂や、水ガラス（ケイ酸ナトリウム溶液）などが該当する。絶縁材が絶縁性塗料２１の場合には、塗布後に半固体状あるいは固体状に固化するものでもよい。   Insulating materials here include insulating paint 21 and insulating tape, and insulating materials include UV curable resin, rubber-based resin, vinylidene fluoride (PVDF) resin, water glass (silica). Acid sodium solution). When the insulating material is the insulating paint 21, it may be solidified into a semi-solid or solid state after application.

絶縁材は、出力端子７の下部あるいは蓋３の内面において電池内に露出する箇所の全てを被覆することが好ましいが、出力端子７の下部であって蓋３の内面に近い周辺部のみ、あるいは蓋３の内面であって出力端子７の下部に近い周辺部のみを被覆するものであってもよい。   The insulating material preferably covers all of the portions exposed in the battery at the lower portion of the output terminal 7 or the inner surface of the lid 3, but only the peripheral portion near the inner surface of the lid 3 at the lower portion of the output terminal 7, or The inner surface of the lid 3 and only the peripheral portion close to the lower portion of the output terminal 7 may be covered.

具体的には、電極体２は、帯状の正極１１と帯状の負極１２との間にセパレータ１３を介在させた状態で巻回して形成してあり、負極１２の負極活物質としては、リチウム金属またはリチウム合金を用いている。   Specifically, the electrode body 2 is formed by winding a separator 13 between a strip-shaped positive electrode 11 and a strip-shaped negative electrode 12, and the negative electrode active material of the negative electrode 12 is lithium metal. Alternatively, a lithium alloy is used.

集電リード１５は、絶縁材で被覆されているものとすることができる。   The current collecting lead 15 can be covered with an insulating material.

より具体的には、蓋３に、絶縁ガスケット６および出力端子７が貫通状に取り付けられる端子取付孔９を設けてあり、絶縁ガスケット６の下側に押さえ板１０が配されて、出力端子７が、押さえ板１０および絶縁ガスケット６を介して端子取付孔９の周縁に固定されており、押さえ板１０が絶縁材で被覆されている。   More specifically, the lid 3 is provided with a terminal mounting hole 9 through which the insulating gasket 6 and the output terminal 7 are attached in a penetrating manner, and a pressing plate 10 is disposed below the insulating gasket 6 so that the output terminal 7 Are fixed to the periphery of the terminal mounting hole 9 via the pressing plate 10 and the insulating gasket 6, and the pressing plate 10 is covered with an insulating material.

本発明によれば、電池内に露出する出力端子７の下部と蓋３の内面とのうち、少なくとも一方が絶縁材で被覆されるので、出力端子７の下部あるいは蓋３の内面にリチウム金属などが析出しても、そのリチウム金属などによって出力端子７と蓋３との間で内部短絡が生じることが防止され、その分だけ電池の信頼性が向上する。   According to the present invention, at least one of the lower portion of the output terminal 7 exposed in the battery and the inner surface of the lid 3 is covered with the insulating material, so that the lower portion of the output terminal 7 or the inner surface of the lid 3 is covered with lithium metal or the like. Even if it deposits, the internal short circuit between the output terminal 7 and the lid 3 is prevented by the lithium metal, and the reliability of the battery is improved accordingly.

集電リード１５を絶縁材で被覆すると、集電リード１５と蓋３との間での内部短絡も確実に防止できて、電池の信頼性がより向上する。   If the current collecting lead 15 is covered with an insulating material, an internal short circuit between the current collecting lead 15 and the lid 3 can be surely prevented, and the reliability of the battery is further improved.

出力端子７が押さえ板１０および絶縁ガスケット６を介して端子取付孔９の周縁に固定されている場合に、押さえ板１０を絶縁材で被覆すると、押さえ板１０と蓋３との間での内部短絡が確実に防止できて、この点でも電池の信頼性が向上する。   When the output terminal 7 is fixed to the periphery of the terminal mounting hole 9 via the pressing plate 10 and the insulating gasket 6, the inner portion between the pressing plate 10 and the lid 3 is covered with the insulating material. A short circuit can be reliably prevented, and the reliability of the battery is also improved in this respect.

図面は、本発明が対象とする密閉型電池を示し、図２に示すごとく、上面が開口する有底円筒形状の電池缶１と、電池缶１内に収容される電極体２および非水電解液と、電池缶１の開口上面を塞ぐ円形状の蓋３と、電極体２と蓋３との間に配置される絶縁体５とを含む。電池缶１および蓋３は、冷間圧延鋼板（ＳＰＣＣ）などで形成される。前記電池は、外径寸法が１７mm、高さ寸法が４５mmである。   The drawing shows a sealed battery as an object of the present invention. As shown in FIG. 2, a bottomed cylindrical battery can 1 having an open top surface, an electrode body 2 accommodated in the battery can 1, and non-aqueous electrolysis. A liquid, a circular lid 3 that covers the upper surface of the opening of the battery can 1, and an insulator 5 disposed between the electrode body 2 and the lid 3. The battery can 1 and the lid 3 are formed of a cold rolled steel plate (SPCC) or the like. The battery has an outer diameter of 17 mm and a height of 45 mm.

蓋３の中央には、図１に示すごとく、絶縁ガスケット６および出力端子７が貫通状に取り付けられる端子取付孔９が設けられる。蓋３の外周縁が電池缶１の開口内周面にレーザーでシーム溶接されることで、電池缶１と蓋３とが導通する。絶縁ガスケット６の下側には、押さえ板１０が配されており、出力端子７は、押さえ板１０および絶縁ガスケット６を介して端子取付孔９の周縁にかしめ固定される。   In the center of the lid 3, as shown in FIG. 1, a terminal attachment hole 9 is provided in which the insulating gasket 6 and the output terminal 7 are attached in a penetrating manner. When the outer peripheral edge of the lid 3 is seam welded to the inner peripheral surface of the opening of the battery can 1 by a laser, the battery can 1 and the lid 3 are electrically connected. A pressing plate 10 is disposed below the insulating gasket 6, and the output terminal 7 is caulked and fixed to the periphery of the terminal mounting hole 9 via the pressing plate 10 and the insulating gasket 6.

電極体２は、電極としての帯状の正極１１と帯状の負極１２とを有しており、正極１１と負極１２との間に帯状のセパレータ１３を介在させた状態で渦巻状に巻回して形成される。セパレータ１３は、ポリプロピレン樹脂製の微多孔性薄膜フィルムからなる。   The electrode body 2 has a belt-like positive electrode 11 and a belt-like negative electrode 12 as electrodes, and is formed by winding in a spiral shape with a belt-like separator 13 interposed between the positive electrode 11 and the negative electrode 12. Is done. The separator 13 is made of a microporous thin film made of polypropylene resin.

正極１１は、網状ステンレス箔製の正極集電体１１ａの裏表両面に正極剤が配されることで形成される。正極剤は、正極活物質としての二酸化マンガンと、バインダーと、カーボンブラックなどを含有する。負極１２は、銅箔製の負極集電体１２ａの裏表両面に負極活物質としてのリチウム金属またはリチウム合金が配されることで形成される。正極１１からは、薄板状の正極集電リード１５が導出されており、負極１２からは、薄板状の負極集電リード１６が導出される。   The positive electrode 11 is formed by arranging a positive electrode agent on both the front and back surfaces of a positive electrode current collector 11a made of a mesh stainless steel foil. The positive electrode agent contains manganese dioxide as a positive electrode active material, a binder, carbon black, and the like. The negative electrode 12 is formed by arranging lithium metal or a lithium alloy as a negative electrode active material on both sides of a negative electrode current collector 12a made of copper foil. A thin plate-like positive electrode current collecting lead 15 is led out from the positive electrode 11, and a thin plate-like negative electrode current collecting lead 16 is led out from the negative electrode 12.

蓋３の外周寄りには、開裂ベント１７が形成されており、電池内圧が異常上昇したときに開裂ベント１７が開裂して電池内圧を解放する。蓋３には、電池缶１内に電解液を注入するための注液孔１９が形成されており、電解液の注入後の注液孔１９に栓２０が配されてレーザーでシーム溶接される。   A cleaving vent 17 is formed near the outer periphery of the lid 3, and the cleaving vent 17 is cleaved to release the battery internal pressure when the battery internal pressure rises abnormally. A liquid injection hole 19 for injecting an electrolyte into the battery can 1 is formed in the lid 3, and a plug 20 is disposed in the liquid injection hole 19 after the injection of the electrolyte and is seam welded with a laser. .

前記かしめ加工後の出力端子７の下端面７ａには、図１に示すごとく正極集電リード１５が溶接される。負極集電リード１６は、図２に示すごとく電池缶１の内周上端部に溶接される。これによって、出力端子７が正極の電位になり、電池缶１および蓋３が負極の電位になる。負極集電リード１６は、蓋３の内面に溶接されてもよい。電極体２は、その外周面がセパレータ１３で巻回されるよう形成される。   A positive electrode current collecting lead 15 is welded to the lower end surface 7a of the output terminal 7 after the caulking process as shown in FIG. The negative electrode current collector lead 16 is welded to the inner peripheral upper end of the battery can 1 as shown in FIG. As a result, the output terminal 7 has a positive potential, and the battery can 1 and the lid 3 have a negative potential. The negative electrode current collecting lead 16 may be welded to the inner surface of the lid 3. The electrode body 2 is formed such that its outer peripheral surface is wound around the separator 13.

非水電解液は、プロピレンカーボネート（ＰＣ）やジメチルエーテル（ＤＭＥ）などを含有する有機溶剤からなる。絶縁体５および絶縁ガスケット６は、ポリプロピレン（ＰＰ）樹脂などからなる。押さえ板１０は、ステンレス鋼でリング状に形成される。なお、本発明に係る電池は、電池缶１が有底角筒形状などであってもよい。電池缶１の底部には、図２に示すごとく、ポリプロピレン（ＰＰ）樹脂などからなる絶縁板２５が配される。   The non-aqueous electrolyte is composed of an organic solvent containing propylene carbonate (PC), dimethyl ether (DME), or the like. The insulator 5 and the insulating gasket 6 are made of polypropylene (PP) resin or the like. The holding plate 10 is formed in a ring shape from stainless steel. In the battery according to the present invention, the battery can 1 may have a bottomed rectangular tube shape or the like. As shown in FIG. 2, an insulating plate 25 made of polypropylene (PP) resin or the like is disposed on the bottom of the battery can 1.

電池の組み立てに際しては、蓋３に対し、前述のように出力端子７、絶縁ガスケット６および押さえ板１０を取り付けておき、絶縁板２５、電極体２および絶縁体５を電池缶１内に収容したのちに、正極集電リード１５を出力端子７の下端面７ａに、負極集電リード１６を電池缶１の内周面にそれぞれ前述の要領で溶接する。   When assembling the battery, the output terminal 7, the insulating gasket 6 and the pressing plate 10 are attached to the lid 3 as described above, and the insulating plate 25, the electrode body 2 and the insulating body 5 are accommodated in the battery can 1. Thereafter, the positive electrode current collector lead 15 is welded to the lower end surface 7a of the output terminal 7 and the negative electrode current collector lead 16 is welded to the inner peripheral surface of the battery can 1 as described above.

次いで、図１に示すごとく、電池内に露出する出力端子７の下端部と押さえ板１０と正極集電リード１５の上部とに絶縁性塗料（絶縁材）２１がそれぞれ塗布されて被覆される。絶縁性塗料２１は、ＵＶ硬化樹脂や、ゴム系樹脂や、フッ化ビニリデン樹脂や、水ガラスなどの前記電解液に対して耐性を有する絶縁材が設定される。ゴム系樹脂としては、前記電解液に膨潤し難く、かつ溶解し難いものが好ましく、ブチルゴムやポリイソブチレンゴムまたはこれらの混合物からなるゴム成分などが好ましい。   Next, as shown in FIG. 1, an insulating paint (insulating material) 21 is applied and coated on the lower end portion of the output terminal 7 exposed in the battery, the holding plate 10, and the upper portion of the positive electrode current collecting lead 15. The insulating paint 21 is set with an insulating material having resistance to the electrolytic solution, such as a UV curable resin, a rubber-based resin, a vinylidene fluoride resin, and water glass. The rubber-based resin is preferably one that does not easily swell and dissolve in the electrolytic solution, and a rubber component made of butyl rubber, polyisobutylene rubber, or a mixture thereof is preferable.

絶縁性塗料２１は、撥水性や發油性を有するものがより好ましい。正極集電リード１５の全体に絶縁性塗料２１を塗布してもよいが、正極集電リード１５の下部は、図１に示すごとく絶縁テープ２２で覆われているために、前記下部には絶縁性塗料２１を塗布しなくても済むことになる。   The insulating paint 21 is more preferably water-repellent or oil-repellent. Insulating paint 21 may be applied to the entire positive electrode current collecting lead 15, but the lower part of the positive electrode current collecting lead 15 is covered with an insulating tape 22 as shown in FIG. Therefore, it is not necessary to apply the functional paint 21.

絶縁性塗料２１の塗布後に蓋３を電池缶１に前述の要領で溶接し、注液孔１９から電解液を注入したのちに、注液孔１９を栓２０で塞いで溶接することで電池が完成する。   After applying the insulating paint 21, the lid 3 is welded to the battery can 1 as described above, the electrolyte is injected from the injection hole 19, and then the injection hole 19 is closed with the plug 20 and welded. Complete.

このように、正極の電位であって電池内に露出し、かつ蓋３の内面近くに位置する箇所、すなわち出力端子７の下部と、押さえ板１０と、正極集電リード１５の上部とが絶縁性塗料２１で被覆されるので、蓋３の内面にリチウム金属が析出しても、そのリチウム金属が出力端子７や押さえ板１０や正極集電リード１５に接触することが低減される。   In this way, the potential of the positive electrode that is exposed in the battery and located near the inner surface of the lid 3, that is, the lower portion of the output terminal 7, the pressing plate 10, and the upper portion of the positive current collecting lead 15 are insulated. Since it is covered with the conductive paint 21, even if lithium metal is deposited on the inner surface of the lid 3, the contact of the lithium metal with the output terminal 7, the holding plate 10, and the positive electrode current collecting lead 15 is reduced.

前記説明では、出力端子７と、押さえ板１０と、正極集電リード１５とを絶縁性塗料２１で被覆したが、これに代えて蓋３の内面を絶縁性塗料２１で被覆してもよく、また出力端子７と、押さえ板１０と、正極集電リード１５と、蓋３の内面とをそれぞれ絶縁性塗料２１で被覆してもよい。   In the above description, the output terminal 7, the holding plate 10, and the positive electrode current collector lead 15 are covered with the insulating paint 21. Instead, the inner surface of the lid 3 may be covered with the insulating paint 21. Further, the output terminal 7, the pressing plate 10, the positive electrode current collector lead 15, and the inner surface of the lid 3 may be covered with an insulating paint 21, respectively.

本発明は、出力端子７を負極の電位、電池缶１および蓋３を正極の電位に設定した電池であっても適用できる。この場合、前述と同様に出力端子７と、押さえ板１０と、正極集電リード１５とを絶縁性塗料２１で被覆してもよく、これに代えて蓋３の内面を絶縁性塗料２１で被覆してもよく、また出力端子７と、押さえ板１０と、正極集電リード１５と、蓋３の内面とを絶縁性塗料２１で被覆してもよい。   The present invention can also be applied to a battery in which the output terminal 7 is set to a negative potential and the battery can 1 and the lid 3 are set to a positive potential. In this case, the output terminal 7, the holding plate 10, and the positive electrode current collecting lead 15 may be covered with the insulating paint 21 as described above. Instead, the inner surface of the lid 3 is covered with the insulating paint 21. Alternatively, the output terminal 7, the pressing plate 10, the positive electrode current collector lead 15, and the inner surface of the lid 3 may be covered with an insulating paint 21.

本発明に係る密閉型電池の要部の拡大縦断正面図Enlarged longitudinal front view of the main part of the sealed battery according to the present invention 密閉型電池の全体の縦断正面図Overall front view of sealed battery

符号の説明Explanation of symbols

１ 電池缶
２ 電極体
３ 蓋
６ 絶縁ガスケット
７ 出力端子
１１ 正極
１２ 負極
１３ セパレータ
１５ 正極集電リード
２１ 絶縁性塗料 DESCRIPTION OF SYMBOLS 1 Battery can 2 Electrode body 3 Cover 6 Insulation gasket 7 Output terminal 11 Positive electrode 12 Negative electrode 13 Separator 15 Positive electrode current collection lead 21 Insulating paint

Claims (4)

上面が開口する有底筒形状の電池缶と、正極と負極とを有して前記電池缶内に収容される電極体と、前記電池缶の開口上面を塞ぐ蓋と、前記蓋に対して絶縁ガスケットを介して貫通状に取り付けられる出力端子とを含む密閉型電池において、
前記正極および前記負極のいずれか一方の電極から導出された集電リードが前記出力端子に接続されており、
電池内に露出する前記出力端子の下部と前記蓋の内面とのうち、少なくとも一方が絶縁材で被覆されることを特徴とする密閉型電池。 A bottomed cylindrical battery can having an open top surface, an electrode body having a positive electrode and a negative electrode and housed in the battery can, a lid for closing the open top surface of the battery can, and insulation from the lid In a sealed battery including an output terminal attached in a penetrating manner through a gasket,
A current collecting lead led out from one of the positive electrode and the negative electrode is connected to the output terminal,
A sealed battery, wherein at least one of the lower part of the output terminal exposed in the battery and the inner surface of the lid is covered with an insulating material. 前記電極体は、帯状の前記正極と帯状の前記負極との間にセパレータを介在させた状態で巻回して形成してあり、
前記負極の負極活物質としては、リチウム金属またはリチウム合金を用いた請求項１記載の密閉型電池。 The electrode body is formed by winding with a separator interposed between the strip-shaped positive electrode and the strip-shaped negative electrode,
The sealed battery according to claim 1, wherein lithium metal or a lithium alloy is used as the negative electrode active material of the negative electrode. 前記集電リードが、前記絶縁材で被覆される請求項１又は２記載の密閉型電池。   The sealed battery according to claim 1, wherein the current collecting lead is covered with the insulating material. 前記蓋には、前記絶縁ガスケットおよび前記出力端子が貫通状に取り付けられる端子取付孔を設けてあり、
前記絶縁ガスケットの下側に押さえ板が配されて、前記出力端子が、前記押さえ板および前記絶縁ガスケットを介して前記端子取付孔の周縁に固定されており、
前記押さえ板が、前記絶縁材で被覆される請求項１又は２又は３記載の密閉型電池。 The lid is provided with a terminal mounting hole for mounting the insulating gasket and the output terminal in a penetrating manner,
A pressing plate is arranged on the lower side of the insulating gasket, and the output terminal is fixed to a peripheral edge of the terminal mounting hole via the pressing plate and the insulating gasket,
The sealed battery according to claim 1, wherein the pressing plate is covered with the insulating material.
JP2006010805A 2006-01-19 2006-01-19 Sealed battery Withdrawn JP2007194064A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009289718A (en) * 2008-06-02 2009-12-10 Hitachi Vehicle Energy Ltd Lithium secondary battery
CN102136561A (en) * 2010-01-26 2011-07-27 Sb锂摩托有限公司 Rechargeable battery
WO2019054312A1 (en) * 2017-09-15 2019-03-21 三洋電機株式会社 Cylindrical nonaqueous electrolyte secondary battery

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009289718A (en) * 2008-06-02 2009-12-10 Hitachi Vehicle Energy Ltd Lithium secondary battery
CN102136561A (en) * 2010-01-26 2011-07-27 Sb锂摩托有限公司 Rechargeable battery
US20110183194A1 (en) * 2010-01-26 2011-07-28 Chiyoung Lee Rechargeable battery
JP2011154990A (en) * 2010-01-26 2011-08-11 Sb Limotive Co Ltd Secondary battery
WO2019054312A1 (en) * 2017-09-15 2019-03-21 三洋電機株式会社 Cylindrical nonaqueous electrolyte secondary battery
JPWO2019054312A1 (en) * 2017-09-15 2020-10-15 三洋電機株式会社 Cylindrical non-aqueous electrolyte secondary battery
JP7171585B2 (en) 2017-09-15 2022-11-15 三洋電機株式会社 Cylindrical non-aqueous electrolyte secondary battery

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