JP2012234785A - Sealed battery and sealing body thereof - Google Patents

Sealed battery and sealing body thereof Download PDF

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JP2012234785A
JP2012234785A JP2011114153A JP2011114153A JP2012234785A JP 2012234785 A JP2012234785 A JP 2012234785A JP 2011114153 A JP2011114153 A JP 2011114153A JP 2011114153 A JP2011114153 A JP 2011114153A JP 2012234785 A JP2012234785 A JP 2012234785A
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sealed battery
terminal pin
sealing plate
metal
gasket
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Kunitoshi Mutsuki
邦年 睦月
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Mutsuki Electric KK
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Mutsuki Electric KK
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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
    • 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

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  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a sealing body of a sealed battery whose terminal pin is fixed to a metal sealing plate by a caulking through a gasket, the sealing body capable of preventing deterioration of air tightness resulting from a long time usage between the gasket and both surfaces of the metal sealing plate and between the gasket and large diameter parts at both ends of the terminal pin so as to make an electrolyte leakage less likely to happen.SOLUTION: In a sealing body of a sealed battery, a terminal pin inserting hole 14 is configured by closely bonding a cylindrical part 11 of a gasket 1 made of a synthetic resin to a penetrating hole 21 of a metal sealing plate 2. The cylindrical part 11 is integrally molded with the metal sealing plate 2 so that the cylindrical part 11 has flanged parts 12 at its both ends made of the same synthetic resin, the flanged parts 12 closely bonded to both surfaces of the metal sealing plate 2 and extending in an outer peripheral direction. Thus, rigidity is added by forming a ring-shaped projection wall made of a synthetic resin with little compressive deformation around an outer peripheral edge 13 of the flanged parts 12.

Description

本発明は、密閉型電池の封口体およびその封口体を用いた密閉型電池に関する。  The present invention relates to a sealed body of a sealed battery and a sealed battery using the sealed body.

密閉型電池は、開口端を有する密閉型電池本体内に正極と陰極の電極および電解液を収容したものであり、その電解液がその開口端から外部へ漏れ出ないように封口体にてその開口端を封止させている。この封口体には電極の正極もしくは陰極と電気接続された外部端子となる端子ピンが設けられている。このような端子ピン付き封口体にあっては、金属封口板の端子ピン挿入孔に合成樹脂でできたガスケットを介して端子ピンの軸部を挿入して、その軸部の両端を突出させて押圧することにより、軸部の径より大きい径大部を形成するようにして端子ピンを金属封口板にガスケットを介してかしめ固着して、ガスケットを金属封口板の両面および端子ピン挿入孔に密着接合させている。このような端子ピンのかしめ加工では、ガスケットに大きな機械的なストレスを与えるので、ガスケットに機械的強度や化学的安定性の高い材料を用いて金属封口板の端子ピン挿入孔と端子ピンの軸部との間を電気的に絶縁させ、かつ密着接合をさせるよう対策を講じている。しかし、端子ピンの突出した軸部を押圧して径大部がガスケットを圧縮すると、ガスケットの端子ピンに近い部位は圧縮密度が高くなり、密閉型電池を長年使用すると、充放電の繰り返しによる温度や内圧の上昇でガスケットが膨張収縮を繰り返し、その結果、ガスケットと金属封口板の両面および端子ピンの両端の径大部との間の気密性が劣化して電解液が外部へ漏れ出やすくなるという問題がある。  A sealed battery is one in which a positive electrode and a cathode electrode and an electrolytic solution are accommodated in a sealed battery body having an open end, and a sealing body prevents the electrolyte from leaking outside from the open end. The open end is sealed. The sealing body is provided with a terminal pin serving as an external terminal electrically connected to the positive electrode or the cathode of the electrode. In such a sealing body with a terminal pin, a shaft portion of a terminal pin is inserted into a terminal pin insertion hole of a metal sealing plate through a gasket made of a synthetic resin, and both ends of the shaft portion are protruded. By pressing, the terminal pin is caulked and fixed to the metal sealing plate via the gasket so as to form a larger diameter portion than the diameter of the shaft portion, and the gasket is adhered to both sides of the metal sealing plate and the terminal pin insertion hole. It is made to join. Such crimping of terminal pins gives a large mechanical stress to the gasket. Therefore, use a material with high mechanical strength and chemical stability for the gasket. Measures are taken to electrically insulate the part from each other and to make close contact. However, if the large diameter part compresses the gasket by pressing the protruding shaft part of the terminal pin, the compression density of the part near the terminal pin of the gasket becomes high, and the temperature due to repeated charge and discharge when using a sealed battery for many years. As the internal pressure rises, the gasket repeatedly expands and contracts. As a result, the airtightness between the gasket and both sides of the metal sealing plate and the large diameter at both ends of the terminal pin deteriorates, and the electrolyte easily leaks to the outside. There is a problem.

そこで、特許文献１において、負極缶の開口部に封口板が固定されると共に、封口板の中央開口部に正極端子板（本願の端子ピン）がかしめ固定され、負極缶の内部に収容された電極体が発生する電力を、正極端子板および負極缶から外部へ取り出すことが可能な電気エネルギー蓄積デバイスにおいて、ガスケットを互いに係合するポリプロピレン樹脂やポリエチレン樹脂からなる２種の絶縁部材で構成して、正極端子板と封口板とをこれらの絶縁部材を介してかしめ固着させる際、その両絶縁部材の係合部が、封口板と正極端子板のかしめ部との間に挟圧されて、両絶縁部材が互いに係合したまま相対的なずれた状態で互いに圧着されることにより、正極端子板のかしめ固着に伴って両絶縁部材に生ずることとなる変形量の大部分が吸収され、各絶縁部材に生じる変形は十分に小さくなって、両絶縁部材の変形に伴う破損が防止されるようにした電気エネルギー蓄積デバイスが提案されている。  Therefore, in Patent Document 1, a sealing plate is fixed to the opening of the negative electrode can, and a positive terminal plate (terminal pin of the present application) is caulked and fixed to the central opening of the sealing plate, and is accommodated inside the negative electrode can. In an electrical energy storage device that can take out the electric power generated by the electrode body from the positive terminal plate and the negative electrode can, the gasket is composed of two kinds of insulating members made of polypropylene resin or polyethylene resin that engage with each other. When the positive electrode terminal plate and the sealing plate are caulked and fixed via these insulating members, the engaging portions of the both insulating members are sandwiched between the sealing plate and the caulked portion of the positive electrode terminal plate, Since the insulating members are pressed against each other while being engaged with each other, most of the deformation that occurs in both insulating members due to the caulking and fixing of the positive electrode terminal plate is absorbed. , Deformation caused in the insulating member is sufficiently small, the electric energy storage device breakage due to deformation of both the insulating member is to be prevented is proposed.

しかし、特許文献１のような２種の絶縁部材から構成されガスケットでは、封口板と正極端子板のかしめ固着時に両絶縁部材の変形に伴う破損が防止されるようにしても、両絶縁部材の外周縁には剛性をもたせていないので、密閉型電池を長年使用すると、充放電の繰り返しによる温度や内圧の上昇でガスケットに膨張収縮が繰り返されることにより、両絶縁部材がその圧着部から外周縁方向に伸びようとする応力歪を吸収することができないので、各絶縁部材と封口板および正極端子板との間および両絶縁部材の係合部間における気密性が劣化することになる。  However, in the gasket composed of two kinds of insulating members as in Patent Document 1, even if the sealing plate and the positive electrode terminal plate are caulked and fixed, damage due to deformation of both insulating members can be prevented. Since the outer periphery is not rigid, if the sealed battery is used for many years, the expansion and contraction of the gasket is repeated due to the increase in temperature and internal pressure due to repeated charge and discharge, so that both insulating members are separated from the crimped portion. Since the stress strain that tends to extend in the direction cannot be absorbed, the airtightness between each insulating member and the sealing plate and the positive terminal plate and between the engaging portions of both insulating members is deteriorated.

そこで、特許文献２において、絶縁性、気密性に優れ、絶縁部材（本願のガスケット）と金属板（本願の金属封口板）、電極導出ピン（本願の端子ピン）との間の気密保持性が良好で、経時的な変化が小さく信頼性が高い密閉型電池を提供することを課題として、電極導出ピンの頭部（本願の径大部）との接触面に、貫通孔の周囲を一周する環状の上部凸条部および下部凸条部を形成することにより、電極導出ピンをかしめた際に上下の凸条部に圧力が集中させるようにした電極端子を有する密閉型電池が提案されている。  Therefore, in Patent Document 2, it is excellent in insulation and airtightness, and has an airtightness retention between the insulating member (the gasket of the present application), the metal plate (the metal sealing plate of the present application), and the electrode lead-out pin (the terminal pin of the present application). Around the through hole around the contact surface with the head of the electrode lead-out pin (large diameter portion of the present application), with the object of providing a sealed battery that is good and has little change over time and high reliability. A sealed battery having electrode terminals in which pressure is concentrated on the upper and lower ridges when the electrode lead-out pins are caulked by forming annular upper ridges and lower ridges has been proposed. .

しかし、特許文献２のように貫通孔の周囲において圧力が集中させるようにしているが、外周縁方向に伸びようとする応力歪を吸収するように配慮されていないので、充放電の繰り返しによる温度や内圧の上昇で絶縁部材に膨張収縮が繰り返されることにより、絶縁部材がその凸条部から外周縁方向に伸びようとする応力歪を吸収することができないので、絶縁部材と電極導出ピンの頭部および金属板における気密性が劣化することを十分に防ぐにはいたっていない。  However, the pressure is concentrated around the through-hole as in Patent Document 2, but it is not considered to absorb the stress strain that tends to extend in the direction of the outer peripheral edge. Since the expansion and contraction of the insulating member is repeated due to the increase of the internal pressure or the internal pressure, the insulating member cannot absorb the stress strain that tends to extend from the ridge portion toward the outer peripheral edge. However, it is not enough to prevent the airtightness of the metal part and the metal plate from deteriorating.

特開２０００−３３１６５６号公報JP 2000-331656 A 特開２００６−２１６４１１号公報JP 2006-216411 A

本発明は、上記の問題点を解消するために、密閉型電池を長年使用することによるガスケットと金属封口板の両面および端子ピンの両端の径大部との間の気密性の劣化を防ぎ、電解液が外部へ漏れ出にくくする密閉型電池の封口体およびその封口体を用いた密閉型電池を提供することを目的とする。  In order to eliminate the above problems, the present invention prevents deterioration in airtightness between the gasket and the both sides of the metal sealing plate and the large diameters at both ends of the terminal pin due to the use of the sealed battery for many years. It is an object of the present invention to provide a sealed battery sealing body that makes it difficult for an electrolytic solution to leak to the outside, and a sealed battery using the sealing body.

本発明の密閉型電池の封口体に係る請求項１に記載の発明は、金属封口板の貫通孔に合成樹脂でできたガスケットの筒部を密着接合させて端子ピン挿入孔となし、前記筒部の両端に同じ合成樹脂で前記金属封口板の両面に密着させて外周方向に延出させた鍔部を有するように金属封口板と一体成形してできた密閉型電池の封口体において、前記鍔部の外周縁に圧縮変形の少ない合成樹脂でできた環状の凸壁を形成して前記外周縁に剛性をもたせたことを特徴とする。同請求項２に記載の発明は、請求項１記載の密閉型電池の封口体で、前記ガスケットの筒部および鍔部は同じ熱可塑性樹脂でできており、前記鍔部の外周縁は熱硬化性樹脂でできたことを特徴とする。同請求項３に記載の発明は、請求項１記載の密閉型電池の封口体で、前記ガスケットの筒部および鍔部は同じ熱可塑性樹脂でできており、前記鍔部の外周縁は剛性をもたせる充填剤を含有してなる熱可塑性樹脂でできたことを特徴とする。同請求項４に記載の発明は、請求項１から３の何れかひとつに記載の密閉型電池の封口体で、前記金属封口板にはその両面から突出した環状リブを形成してあり、前記鍔部を金属封口板の両面に密着接合させるに際し、前記鍔部の外周縁が前記環状リブを内包してガスケットと金属封口板とを一体成形してできたことを特徴とする。同請求項５に記載の発明は、請求項１から４の何れかひとつに記載の密閉型電池の封口体で、前記筒部には内部にゴム部材からなる芯部を備えたことを特徴とする。  The invention according to claim 1 relating to the sealing body of the sealed battery according to the present invention is characterized in that the cylindrical portion of the gasket made of synthetic resin is closely bonded to the through hole of the metal sealing plate to form the terminal pin insertion hole, and the cylinder In a sealed battery sealing body formed by integrally molding with a metal sealing plate so as to have a collar portion that is closely attached to both surfaces of the metal sealing plate with the same synthetic resin at both ends of the portion and extends in the outer peripheral direction, An annular convex wall made of a synthetic resin with little compression deformation is formed on the outer peripheral edge of the collar portion, and the outer peripheral edge is provided with rigidity. The invention according to claim 2 is the sealing body of the sealed battery according to claim 1, wherein the cylindrical portion and the flange portion of the gasket are made of the same thermoplastic resin, and the outer peripheral edge of the flange portion is thermoset. It is made of an adhesive resin. The invention according to claim 3 is the sealing body of the sealed battery according to claim 1, wherein the cylindrical portion and the flange portion of the gasket are made of the same thermoplastic resin, and the outer peripheral edge of the flange portion is rigid. It is characterized by being made of a thermoplastic resin containing a filler to be given. The invention according to claim 4 is the sealing body of the sealed battery according to any one of claims 1 to 3, wherein the metal sealing plate is formed with annular ribs protruding from both surfaces thereof, When the flange portion is tightly bonded to both surfaces of the metal sealing plate, the outer peripheral edge of the flange portion is formed by integrally molding the gasket and the metal sealing plate by enclosing the annular rib. The invention according to claim 5 is the sealing body of the sealed battery according to any one of claims 1 to 4, wherein the cylindrical portion includes a core portion made of a rubber member. To do.

本発明の密閉型電池の封口体で、端子ピン付き封口体に係る請求項６に記載の発明は、請求項１から５の何れかひとつに記載の密閉型電池の封口体で、その端子ピン挿入孔に端子ピンの軸部を挿入して前記軸部の両端が突出するように前記金属封口板に端子ピンを配置させた状態で、前記軸部の両端を押圧して端子ピンをかしめることにより形成した軸部の径より大きい径大部が前記ガスケットの筒部の鍔部に密着接合されてなり、端子ピンを前記金属封口板から電気的に絶縁させてできた密閉型電池の端子ピン付き封口体であって、前記端子ピンの径大部の外側に前記鍔部の外周縁があることを特徴とする。同請求項７に記載の発明は、請求項１から５の何れかひとつに記載の密閉型電池の封口体で、端子ピンの軸部の少なくとも一端に金属プレートを有し、前記端子ピン挿入孔に端子ピンの軸部を挿入して前記軸部の両端が突出するように前記金属封口板に端子ピンを配置させた状態で、前記軸部の両端を押圧して前記金属プレートを介して端子ピンをかしめることにより形成した軸部の径より大きい径大部が前記金属プレートを介して前記ガスケットの筒部の鍔部に密着接合されてなり、端子ピンおよび前記金属プレートを前記金属封口板から電気的に絶縁させてできた密閉型電池の端子ピン付き封口体であって、前記金属プレートの外側に前記鍔部の外周縁があることを特徴とする。  The invention according to claim 6 relating to the sealing body of the sealed battery according to the present invention and the sealing body with terminal pins is the sealing body of the sealed battery according to any one of claims 1 to 5, wherein the terminal pin is Inserting the shaft portion of the terminal pin into the insertion hole and pressing the both ends of the shaft portion to crimp the terminal pin in a state where the terminal pins are arranged on the metal sealing plate so that both ends of the shaft portion protrude. A terminal of a sealed battery in which a large diameter portion larger than the diameter of the shaft portion formed by this is closely joined to the flange portion of the cylindrical portion of the gasket, and the terminal pin is electrically insulated from the metal sealing plate. It is a sealing body with a pin, Comprising: The outer periphery of the said collar part exists in the outer side of the large diameter part of the said terminal pin, It is characterized by the above-mentioned. The invention according to claim 7 is the sealing body for a sealed battery according to any one of claims 1 to 5, wherein the terminal pin insertion hole has a metal plate at least at one end of the shaft portion of the terminal pin. In the state where the terminal pin is arranged on the metal sealing plate so that both ends of the shaft portion protrude from the shaft portion of the terminal pin, the both ends of the shaft portion are pressed to connect the terminal via the metal plate. A large diameter portion larger than the diameter of the shaft portion formed by caulking the pin is closely bonded to the flange portion of the cylindrical portion of the gasket via the metal plate, and the terminal pin and the metal plate are connected to the metal sealing plate. A sealing body with a terminal pin of a sealed battery that is electrically insulated from the metal plate, wherein the outer peripheral edge of the collar portion is outside the metal plate.

本発明の密閉型電池に係る請求項８に記載の発明は、請求項６または７に記載の密閉型電池の端子ピン付き封口体を電解液と電極を有する密閉型電池本体の開口端に設けた密閉型電池であって、前記端子ピンまたは金属プレートと密閉型電池本体内の電極とを接続させるとともに前記金属封口板または密閉型電池本体と密閉型電池本体内の他の電極とを接続させて端子ピン付き封口体を密閉型電池本体の開口端に設けて、密閉型電池本体と金属封口板とを気密性をもたせて固着したことを特徴とする。  The invention according to claim 8 relating to the sealed battery of the present invention is provided with the sealing body with terminal pins of the sealed battery according to claim 6 or 7 at the open end of the sealed battery body having the electrolyte and the electrode. A sealed battery, wherein the terminal pin or the metal plate and the electrode in the sealed battery body are connected and the metal sealing plate or the sealed battery body and another electrode in the sealed battery body are connected. The sealing body with terminal pins is provided at the opening end of the sealed battery body, and the sealed battery body and the metal sealing plate are fixed with airtightness.

本発明の封口体においては、金属封口板の貫通孔に合成樹脂でできたガスケットの筒部を密着接合させて端子ピン挿入孔となし、前記筒部の両端に同じ合成樹脂で前記金属封口板の両面に密着させて外周方向に延出させた鍔部を有するように金属封口板と一体成形してできており、その端子ピン挿入孔に端子ピンの軸部を挿入して前記軸部の両端が突出するように前記金属封口板に端子ピンを配置させた状態で、前記軸部の両端を押圧して端子ピンをかしめることにより端子ピン付き封口体となし、前記軸部の両端を押圧により軸部の径より大きい径大部にてガスケットの筒部および鍔部を圧縮させるとき、鍔部がその外周縁方向に伸びようとする応力歪が発生するが、前記鍔部の外周縁に圧縮変形の少ない合成樹脂でできた環状の凸壁を形成して前記外周縁に剛性をもたせているので、前記応力歪を吸収させることができる。その結果、内部に電解液を有する密閉型電池にあっては、その長年使用によりガスケットが膨張収縮されても、ガスケットの鍔部がその外周縁方向に伸びようとせずに、ガスケットと端子ピンの両端の径大部との間の気密性の劣化を防止して、電解液が外部へ漏れ出にくくして、密閉型電池本体と金属封口板とを気密性をもたせた密閉型電池を提供することができる。  In the sealing body of the present invention, the cylindrical portion of the gasket made of synthetic resin is tightly joined to the through hole of the metal sealing plate to form a terminal pin insertion hole, and the metal sealing plate is made of the same synthetic resin at both ends of the cylindrical portion. It is integrally formed with the metal sealing plate so as to have a collar portion that is in close contact with both surfaces and extends in the outer peripheral direction, and the shaft portion of the terminal pin is inserted into the terminal pin insertion hole thereof. In a state where the terminal pins are arranged on the metal sealing plate so that both ends protrude, the both ends of the shaft portion are pressed to caulk the terminal pins to form a sealing body with terminal pins, and both ends of the shaft portion are formed. When compressing the cylindrical part and the flange part of the gasket with a larger diameter than the diameter of the shaft part by pressing, stress distortion occurs in which the flange part tends to extend in the direction of the outer peripheral edge. An annular convex wall made of synthetic resin with little compression deformation Since imparted rigidity to the outer circumferential edge and can be absorbed the stress strain. As a result, in a sealed battery having an electrolyte inside, even if the gasket expands and contracts due to its long-term use, the flange portion of the gasket does not extend toward the outer peripheral edge, and the gasket and the terminal pin Provided is a sealed battery in which the sealed battery body and the metal sealing plate are hermetically sealed by preventing deterioration of the hermeticity between the large diameter portions at both ends, making it difficult for the electrolyte to leak to the outside. be able to.

さらに、本発明は、密閉型電池の封口体に用いるガスケットの筒部をゴム部材からなる芯部と前記芯部を包囲する熱可塑性樹脂部材とを一体成形して形成することにより、端子ピンの軸部を金属封口板の端子ピン挿入孔に挿入して前記金属封口板に端子ピンを配置させた状態で、前記軸部の両端を押圧して端子ピンがガスケットを介して金属封口板にかしめ固着される際、端子ピンの軸部が金属封口板の貫通孔に交叉する方向に伸びようとしてガスケットの筒部を圧縮させるが、ガスケットの筒部内のゴム部材の弾力性により金属封口板の貫通孔に交叉する方向の押圧力を向上させて、端子ピンの軸部とガスケットの筒部の内周面との間およびガスケットの筒部の外周面と金属封口板の貫通孔との間の気密性を維持することができ、しかも、ゴム部材であるので、電気的に絶縁もさせることができる。  Further, according to the present invention, the cylindrical portion of the gasket used for the sealing body of the sealed battery is formed by integrally forming a core portion made of a rubber member and a thermoplastic resin member surrounding the core portion. In a state where the shaft portion is inserted into the terminal pin insertion hole of the metal sealing plate and the terminal pin is arranged on the metal sealing plate, both ends of the shaft portion are pressed and the terminal pin is caulked to the metal sealing plate via the gasket. When fixed, the cylinder part of the gasket is compressed so that the shaft part of the terminal pin extends in the direction crossing the through hole of the metal sealing plate, but the metal sealing plate penetrates due to the elasticity of the rubber member in the cylinder part of the gasket. Improving the pressing force in the direction crossing the hole, the airtightness between the shaft part of the terminal pin and the inner peripheral surface of the gasket cylinder part and between the outer peripheral surface of the gasket cylinder part and the through hole of the metal sealing plate Can maintain sex, and Since in arm member may be electrically insulated also.

本発明の実施形態１で端子ピンを有する密閉型電池の封口体を示す断面図である。It is sectional drawing which shows the sealing body of the sealed battery which has a terminal pin in Embodiment 1 of this invention. 同上の密閉型電池の封口体に使用する金属封口板の断面図である。It is sectional drawing of the metal sealing board used for the sealing body of a sealed type battery same as the above. 同上の密閉型電池の封口体を示す断面図である。It is sectional drawing which shows the sealing body of a sealed type battery same as the above. 同上の密閉型電池の封口体に端子ピンの軸部の両端を押圧して端子ピンを金属封口板にガスケットを介してかしめ固着する分解した断面図である。It is the decomposed | disassembled sectional drawing which presses the both ends of the axial part of a terminal pin to the sealing body of a sealed battery same as the above, and crimps and fixes a terminal pin to a metal sealing board via a gasket. 同上の密閉型電池の封口体に端子ピンの軸部の両端を押圧して端子ピンを金属封口板にガスケットを介してかしめ固着する加工状態を示す断面図である。It is sectional drawing which shows the processing state which presses the both ends of the axial part of a terminal pin to the sealing body of a sealed battery same as the above, and crimps and fixes a terminal pin to a metal sealing board via a gasket. 同上の密閉型電池の封口体に端子ピンかしめ固着する際の応力発生状態を示す断面図である。It is sectional drawing which shows the stress generation | occurrence | production state at the time of adhering and fixing a terminal pin to the sealing body of a sealed battery same as the above. 図６の平面図である。FIG. 7 is a plan view of FIG. 6. 本発明の実施形態２で端子ピンを有する密閉型電池の封口体を示す断面図である。It is sectional drawing which shows the sealing body of the sealed battery which has a terminal pin in Embodiment 2 of this invention. 同上の密閉型電池の封口体に使用する金属封口板の断面図である。It is sectional drawing of the metal sealing board used for the sealing body of a sealed type battery same as the above. 同上の密閉型電池の封口体を示す断面図である。It is sectional drawing which shows the sealing body of a sealed type battery same as the above. 同上の密閉型電池の封口体に端子ピンの軸部の両端を押圧して端子ピンを金属封口板にガスケットを介してかしめ固着する分解した断面図である。It is the decomposed | disassembled sectional drawing which presses the both ends of the axial part of a terminal pin to the sealing body of a sealed battery same as the above, and crimps and fixes a terminal pin to a metal sealing board via a gasket. 同上の密閉型電池の封口体に端子ピンの軸部の両端を押圧して端子ピンを金属封口板にガスケットを介してかしめ固着する加工状態を示す断面図である。It is sectional drawing which shows the processing state which presses the both ends of the axial part of a terminal pin to the sealing body of a sealed battery same as the above, and crimps and fixes a terminal pin to a metal sealing board via a gasket. 本発明の実施形態３で端子ピンを有する密閉型電池の封口体を示す断面図である。It is sectional drawing which shows the sealing body of the sealed battery which has a terminal pin in Embodiment 3 of this invention. 同上の密閉型電池の封口体を示す断面図である。It is sectional drawing which shows the sealing body of a sealed type battery same as the above. 同上の密閉型電池の封口体に端子ピンの軸部の両端を押圧して端子ピンを金属封口板にガスケットを介してかしめ固着する分解した断面図である。It is the decomposed | disassembled sectional drawing which presses the both ends of the axial part of a terminal pin to the sealing body of a sealed battery same as the above, and crimps and fixes a terminal pin to a metal sealing board via a gasket. 本発明の実施形態４で密閉型電池の封口体を示す断面図である。It is sectional drawing which shows the sealing body of a sealed battery in Embodiment 4 of this invention. 同上で端子ピンを有する密閉型電池の封口体を示す断面図である。It is sectional drawing which shows the sealing body of the sealed battery which has a terminal pin same as the above. 本発明の端子ピン付き封口体を用いた密閉型電池を示す断面図である。It is sectional drawing which shows the sealed battery using the sealing body with a terminal pin of this invention.

以下、本発明の実施形態について図面を参照して説明する。  Embodiments of the present invention will be described below with reference to the drawings.

（実施形態１）
図１から図７において、Ａは密閉型電池の封口体であり、Ｂは端子ピン３を有する密閉型電池の封口体であり、外部へ出力する端子として、この端子ピン３自体若しくは図示しないが端子ピン３に被冠したキャップを用いることができる。(Embodiment 1)
1 to 7, A is a sealing body of a sealed battery, B is a sealing body of a sealed battery having a terminal pin 3, and the terminal pin 3 itself or a terminal that is output to the outside is not shown. A cap covered with the terminal pin 3 can be used.

図２は、図１８に示す密閉型電池Ｃの密閉型電池本体８の開口端８１を閉じる蓋となる形状の金属封口板２を示す断面図で、この金属封口板２は、ステンレス、アルミニウム、アルミニウム合金、銅および銅合金の何れかの金属材でできており、端子ピン３を設ける円形状または角形状の貫通孔２１が形成されている。また、図示しないが、必要に応じて密閉型電池本体８の内圧が一定値を越えると破断してガスを放出する安全弁を備える孔や電解液８２を注入する孔が形成されていてもよい。  FIG. 2 is a cross-sectional view showing the metal sealing plate 2 having a shape that serves as a lid for closing the open end 81 of the sealed battery body 8 of the sealed battery C shown in FIG. 18. The metal sealing plate 2 is made of stainless steel, aluminum, It is made of a metal material of any one of aluminum alloy, copper, and copper alloy, and a circular or square through hole 21 in which the terminal pin 3 is provided is formed. Although not shown, a hole provided with a safety valve that breaks and releases gas when the internal pressure of the sealed battery body 8 exceeds a certain value and a hole for injecting the electrolyte 82 may be formed as necessary.

図３において、Ａは密閉型電池の封口体で、金属封口板２とこの金属封口板２の表面および貫通孔２１を電気的に絶縁する合成樹脂でできたガスケット１とからなる。  In FIG. 3, A is a sealing body of a sealed battery, and includes a metal sealing plate 2 and a gasket 1 made of a synthetic resin that electrically insulates the surface of the metal sealing plate 2 and the through hole 21.

金属封口板２とガスケット１は、円板状でもよいが、図７では、細長板状を示している。ガスケット１は、筒部１１とその両端に外周方向に延出した鍔部１２とからなり、合成樹脂で一体成形してできている。この筒部１１は円筒または角筒の形状で金属封口板２の貫通孔２１に密着接合されて端子ピン挿入孔１４となり、鍔部１２は金属封口板２の表面に密着接合されている。これら筒部１１と鍔部１２とが一体成形される合成樹脂としては、ＰＦＡ樹脂（テトラフルオロエチレン−パーフルオロアルコキシエチレン共重合体樹脂）、ＰＰＳ樹脂（ポリフェニレンサルファイド樹脂）、ＰＰ樹脂（ポリプロピレン樹脂）、ＰＥＥＫ樹脂（ポリエーテルエーテルケトン樹脂）およびＦＥＰ樹脂（テトラフルオロエチレン−ヘキサフルオロプロピレン共重合体）などの熱可塑性樹脂が例示できる。また、鍔部１２の外周縁１３はその厚さ方向に突出した環状の凸壁の形状で、筒部１１および鍔部１２の材質とは異なる圧縮変形の少ない合成樹脂でできた外周縁１３が形成されており、この外周縁１３は筒部１１および鍔部１２と２色成形により一体成形して、筒部１１および鍔部１２の成形部材よりも剛性が高くなるようにしている。このように、外周縁１３を筒部１１および鍔部１２よりも剛性が高くなるようにするには、外周縁１３の成形材料にはＰＰＳ樹脂（ポリフェニレンサルファイド樹脂）を用い、筒部１１および鍔部１２の成形材料にはＰＦＡ樹脂（テトラフルオロエチレン−パーフルオロアルコキシエチレン共重合体樹脂）を用いるようにして硬い合成樹脂と柔らかい合成樹脂との組み合わせを選定すればよいが、圧縮変形の少ない合成樹脂、例えば、上記熱可塑性樹脂にガラス繊維や無機フィラーなどを含有させるか、エポキシ樹脂やフェノール樹脂などの熱硬化性樹脂が用いられる。このように、鍔部１２の外周縁１３はその厚さ方向に突出した環状の凸壁の形状となっているが、鍔部１２の外周縁１３以外の部分よりも剛性が高くなるようにすればよいので、筒部１１とその両端に外周方向に延出した鍔部１２とが同じ合成樹脂で一体成形しているのであれば、外周縁１３以外の部分においてもその厚さ方向に突出した凸部が形成されるなど平坦でなくてもよい。  The metal sealing plate 2 and the gasket 1 may be disk-shaped, but FIG. 7 shows an elongated plate shape. The gasket 1 includes a cylindrical portion 11 and flanges 12 extending in the outer peripheral direction at both ends thereof, and is integrally formed with a synthetic resin. The cylindrical portion 11 has a cylindrical or rectangular tube shape and is tightly joined to the through hole 21 of the metal sealing plate 2 to form a terminal pin insertion hole 14, and the flange portion 12 is tightly joined to the surface of the metal sealing plate 2. Synthetic resins in which the cylindrical portion 11 and the flange portion 12 are integrally molded include PFA resin (tetrafluoroethylene-perfluoroalkoxyethylene copolymer resin), PPS resin (polyphenylene sulfide resin), and PP resin (polypropylene resin). And thermoplastic resins such as PEEK resin (polyetheretherketone resin) and FEP resin (tetrafluoroethylene-hexafluoropropylene copolymer). Further, the outer peripheral edge 13 of the flange portion 12 is in the shape of an annular convex wall protruding in the thickness direction, and the outer peripheral edge 13 made of a synthetic resin that is different from the material of the cylindrical portion 11 and the flange portion 12 and has little compression deformation. The outer peripheral edge 13 is integrally formed with the cylindrical portion 11 and the flange portion 12 by two-color molding so that the rigidity is higher than the molded members of the cylindrical portion 11 and the flange portion 12. Thus, in order to make the outer peripheral edge 13 more rigid than the cylindrical portion 11 and the flange portion 12, PPS resin (polyphenylene sulfide resin) is used as a molding material for the outer peripheral edge 13, and the cylindrical portion 11 and the flange portion are used. A combination of a hard synthetic resin and a soft synthetic resin may be selected by using a PFA resin (tetrafluoroethylene-perfluoroalkoxyethylene copolymer resin) as a molding material of the portion 12, but a synthesis with less compression deformation A resin, for example, a glass fiber or an inorganic filler is contained in the thermoplastic resin, or a thermosetting resin such as an epoxy resin or a phenol resin is used. As described above, the outer peripheral edge 13 of the flange portion 12 has a shape of an annular convex wall protruding in the thickness direction, but the rigidity is higher than the portion other than the outer peripheral edge 13 of the flange portion 12. Therefore, if the cylindrical portion 11 and the flange portion 12 extending in the outer peripheral direction at both ends thereof are integrally formed of the same synthetic resin, the portion other than the outer peripheral edge 13 protrudes in the thickness direction. It does not have to be flat, for example, a convex part is formed.

また、金属プレート４は、端子ピン３の両端を押圧してかしめる際に、端子ピン３の径大部３３でガスケット１が損傷するのを防止するためのワッシャであるが、このような金属プレート４を用いずに、径大部３３のみでもよい。一方、金属プレート５は、金属プレート４と同様な作用のワッシャであるとともに、その一端は金属封口板２から離れる方向に突出させたリード板５１に接続されており、このリード板５１は、密閉型電池本体８内の電極体２の正極（または陰極）の電極と電気接続されるようにリード板５１に接続されている。  The metal plate 4 is a washer for preventing the gasket 1 from being damaged by the large-diameter portion 33 of the terminal pin 3 when both ends of the terminal pin 3 are pressed and caulked. Only the large diameter portion 33 may be used without using the plate 4. On the other hand, the metal plate 5 is a washer having the same action as the metal plate 4, and one end of the metal plate 5 is connected to a lead plate 51 protruding in a direction away from the metal sealing plate 2, and the lead plate 51 is hermetically sealed. The battery body 8 is connected to the lead plate 51 so as to be electrically connected to the positive electrode (or cathode) electrode of the electrode body 2 in the battery body 8.

図４において、上述のように形成した密閉型電池の封口体Ａの下方位置に、端子ピン３がその軸部３１の一端の径大部３２に予め金属プレート５を当接または固着した状態で配置させ、上方位置に金属プレート４を配置させる。  In FIG. 4, the terminal pin 3 is in contact with or secured to the large diameter portion 32 at one end of the shaft portion 31 at a position below the sealing body A of the sealed battery formed as described above. It arrange | positions and the metal plate 4 is arrange | positioned in an upper position.

図５は、このようにして配置された端子ピン３が金属プレート４、５およびガスケット１を介して金属封口板２にかしめ固着される加工状態を示す。軸部３１の一端の径大部３２に予め金属プレート５を取り付けて後、軸部３１の他端を端子ピン挿入孔１２に挿入して金属封口板２の表面から突出させてその他端に金属プレート４を取り付けて金属封口板２の表面（図では上面および下面）に金属プレート４、５を有するように端子ピン３を配置させた状態で、軸部３１の両端を矢印Ｐ方向およびＱ方向に押圧することにより、その他端はＲ方向に延出して軸部３１の径より大きい径大部３３が形成される。この場合、端子ピン３には図中で上面側の一端に予め径大部３２が形成されているが、下面側に形成しておいてもよい。また、予め径大部を形成せずに、軸部３１を端子ピン挿入孔１２に挿入できるようにしてその両端を矢印Ｐ方向およびＱ方向に押圧してＲ方向に延出させて径大部３２、３３を形成してもよい。このように、端子ピン３の軸部３１の両端を矢印Ｐ方向およびＱ方向に押圧して径大部３２、３３が形成されるようにして端子ピン３がガスケット１を介して金属封口板２にかしめ固着されることにより、端子ピン３の軸部３１と金属封口板２の貫通孔２１とはガスケット１の筒部１１を介して電気的に絶縁しかつ密着接合されるとともに、端子ピン３の径大部３２、３３にある金属プレート４、５と金属封口板２の表面とはガスケット１の鍔部１２を介して電気的に絶縁しかつ密着接合される。  FIG. 5 shows a processing state in which the terminal pins 3 arranged in this manner are caulked and fixed to the metal sealing plate 2 via the metal plates 4 and 5 and the gasket 1. After attaching the metal plate 5 to the large diameter portion 32 at one end of the shaft portion 31 in advance, the other end of the shaft portion 31 is inserted into the terminal pin insertion hole 12 and protruded from the surface of the metal sealing plate 2 to the other end. With the plate 4 attached and the terminal pins 3 arranged so as to have the metal plates 4 and 5 on the surface (upper surface and lower surface in the figure) of the metal sealing plate 2, both ends of the shaft portion 31 are in the arrow P direction and Q direction. , The other end extends in the R direction, and a large diameter portion 33 larger than the diameter of the shaft portion 31 is formed. In this case, the large diameter portion 32 is formed in advance at one end on the upper surface side of the terminal pin 3 in the drawing, but it may be formed on the lower surface side. Further, the shaft portion 31 can be inserted into the terminal pin insertion hole 12 without previously forming a large-diameter portion, and both ends thereof are pressed in the arrow P direction and the Q direction and extended in the R direction to increase the large-diameter portion. 32 and 33 may be formed. Thus, both ends of the shaft portion 31 of the terminal pin 3 are pressed in the directions of the arrows P and Q to form the large diameter portions 32 and 33 so that the terminal pin 3 is connected to the metal sealing plate 2 via the gasket 1. By being caulked and fixed, the shaft portion 31 of the terminal pin 3 and the through hole 21 of the metal sealing plate 2 are electrically insulated and closely bonded via the tube portion 11 of the gasket 1, and the terminal pin 3 The metal plates 4, 5 in the large diameter portions 32, 33 and the surface of the metal sealing plate 2 are electrically insulated and closely bonded via the flange portion 12 of the gasket 1.

端子ピン３の軸部３１の両端を矢印Ｐ方向およびＱ方向に押圧してＲ方向に延出させて径大部３２、３３を形成すると、ガスケット１の筒部１１および鍔部１２は端子ピン３の径大部３２、３３や金属プレート４、５の部位において圧縮密度が高くなるとともに、図６および図７の矢印に示すように、応力が発生して、ガスケット１の筒部１１および鍔部１２は圧縮されて矢印Ｒ方向に伸びようとする応力歪が発生する。ところが、この鍔部１２が矢印Ｒ方向にある外周縁１３は剛性が高いので、この外周縁１３にて矢印Ｒ方向に伸びようとする応力歪を少なくして、ガスケットが膨張収縮を繰り返してもガスケットと金属封口板の両面および端子ピンの両端の径大部との間の気密性の劣化を防ぎ、電解液が外部へ漏れ出にくくした密閉型電池の封口体Ａまたは端子ピン３を有する密閉型電池の封口体Ｂが得られる。従って、ガスケット１の鍔部１２の外周縁１３の位置は、筒部１１に近い位置で、端子ピン３の径大部３２、３３や金属プレート４、５の部位よりも離れた位置を設定すればよい。  When both ends of the shaft portion 31 of the terminal pin 3 are pressed in the directions of arrows P and Q to extend in the R direction to form the large diameter portions 32 and 33, the cylindrical portion 11 and the flange portion 12 of the gasket 1 are connected to the terminal pin. As shown by the arrows in FIGS. 6 and 7, stress is generated at the portions of the large diameter portions 32 and 33 of 3 and the portions of the metal plates 4 and 5, and stress is generated as shown by arrows in FIGS. The portion 12 is compressed and stress strain is generated to extend in the arrow R direction. However, since the outer peripheral edge 13 with the flange 12 in the arrow R direction has high rigidity, even if the gasket repeats expansion and contraction by reducing the stress strain that tends to extend in the arrow R direction at the outer peripheral edge 13. Sealing with a sealed battery sealing body A or terminal pin 3 that prevents deterioration of airtightness between the gasket and both surfaces of the metal sealing plate and the large diameter portions at both ends of the terminal pin, and prevents the electrolyte from leaking to the outside. A sealing body B of the battery is obtained. Accordingly, the position of the outer peripheral edge 13 of the flange portion 12 of the gasket 1 is set at a position close to the cylindrical portion 11 and away from the large diameter portions 32 and 33 of the terminal pin 3 and the portions of the metal plates 4 and 5. That's fine.

なお、図３に示す金属封口板２とガスケット１からなる封口体Ａは、金属封口板２の貫通孔２１にガスケット１の筒部１１を配置させ、金属封口板２の表面（図１においては上面および下面）にガスケット１の鍔部１２を配置させて、ガスケット１と金属封口板２とを一体成形してできている。この場合、ガスケット１と金属封口板２とを密着接合させるようにする必要があり、好ましくは、金属封口板２の貫通孔２１と金属封口板２の表面またはガスケット１の筒部１１の外周面とガスケット１の鍔部１２の内面（金属封口板２に対面する面）にメルカプト基、チオカルボニル基、シアノ基、イソシアナート基、アミノ基、アンモニウム基、ピリジニウム基、アジニル基、カルボキシル基、ベンゾトリアゾール基、トリアジンチオール基等の何れかまたはこれらを組み合わせた化学的処理剤からなる接着剤の薄膜層を形成して後、ガスケット１の筒部１１と端子ピン１の貫通孔２１およびガスケット１の鍔部１２と金属封口板２の表面とを一体に成形することにより、さらに強固に密着接合される。  The sealing body A composed of the metal sealing plate 2 and the gasket 1 shown in FIG. 3 has the cylindrical portion 11 of the gasket 1 disposed in the through hole 21 of the metal sealing plate 2 and the surface of the metal sealing plate 2 (in FIG. 1). The flange portion 12 of the gasket 1 is disposed on the upper surface and the lower surface, and the gasket 1 and the metal sealing plate 2 are integrally formed. In this case, it is necessary to closely bond the gasket 1 and the metal sealing plate 2, and preferably the through hole 21 of the metal sealing plate 2 and the surface of the metal sealing plate 2 or the outer peripheral surface of the cylindrical portion 11 of the gasket 1. And a mercapto group, a thiocarbonyl group, a cyano group, an isocyanate group, an amino group, an ammonium group, a pyridinium group, an azinyl group, a carboxyl group, a benzoate on the inner surface of the flange 12 of the gasket 1 (the surface facing the metal sealing plate 2) After forming a thin film layer of an adhesive composed of a chemical treatment agent, such as a triazole group or a triazine thiol group, or a combination thereof, the cylindrical portion 11 of the gasket 1, the through hole 21 of the terminal pin 1, and the gasket 1 By integrally forming the flange portion 12 and the surface of the metal sealing plate 2, it is possible to more firmly adhere to each other.

（実施形態２）
図８から図１２は、鍔部１２の外周縁１３に剛性をもたせて筒部１１を外周方向へ圧縮させたとき鍔部１２の合成樹脂の密度が密になって発生する応力歪を吸収して圧縮変形が少なくなるよう剛性をより一層高くするための異なる実施形態で、Ａは密閉型電池の封口体であり、Ｂは端子ピン３を有する密閉型電池の封口体であり、他の符号は図１から図７に示す実施形態１と同じである。(Embodiment 2)
8 to 12 absorb the stress strain generated when the density of the synthetic resin of the flange 12 becomes dense when the outer peripheral edge 13 of the flange 12 is stiffened and the cylindrical portion 11 is compressed in the outer circumferential direction. In another embodiment for further increasing rigidity so as to reduce compressive deformation, A is a sealed battery sealing body, B is a sealed battery sealing body having terminal pins 3, and other symbols. Is the same as that of the first embodiment shown in FIGS.

金属封口板２は実施形態１と同じ金属材でできており、その両面から突出した環状リブ２２が形成されている。この場合、環状リブ２２の突出高さは、ガスケット１の鍔部１２の外周縁１３に環状リブ２２が内包されて外周縁１３に剛性をもたせるようにする高さである。例えば、外周縁１３が鍔部１２の表面から突出した環状の凸壁で形成されたものであれば、環状リブ２２は鍔部１２の厚さよりも大きく設定すればよい。この環状リブ２２は、金属封口板２と同様なステンレス、アルミニウム、アルミニウム合金、銅および銅合金の何れかの金属材からなる金属環を金属封口板２の両面に溶接などで固着するかセラミックや合成樹脂で一体に形成されているが、このような金属封口板２別体とせずに、金属封口板２に上面に突出させた切り起こし片を環状に形成し、下面には上面の切り起こし片のない部位から逆方向に突出させた切り起こし片を環状に形成してもよい。  The metal sealing plate 2 is made of the same metal material as that of the first embodiment, and is formed with annular ribs 22 protruding from both surfaces. In this case, the protruding height of the annular rib 22 is a height that allows the outer peripheral edge 13 to have rigidity by enclosing the annular rib 22 in the outer peripheral edge 13 of the flange 12 of the gasket 1. For example, if the outer peripheral edge 13 is formed of an annular convex wall protruding from the surface of the flange portion 12, the annular rib 22 may be set larger than the thickness of the flange portion 12. The annular rib 22 is formed by fixing a metal ring made of any one of stainless steel, aluminum, aluminum alloy, copper and copper alloy to the both surfaces of the metal sealing plate 2 by welding or the like. Although it is integrally formed of synthetic resin, the metal sealing plate 2 is not formed as a separate body, but the metal sealing plate 2 is formed with a cut-and-raised piece projecting on the upper surface, and the upper surface is cut and raised on the lower surface. You may form the cut-and-raised piece protruded in the reverse direction from the site | part without a piece in cyclic | annular form.

このように形成された金属封口板２の環状リブ２２が筒部１１の鍔部１２の外周縁１３の部位にあり、筒部１１を金属封口板２の貫通孔２１の部位にある配置で金属封口板２とガスケット１とを一体成形することにより、この筒部１１は金属封口板２の貫通孔２１の内周面に密着接合されて端子ピン挿入孔１４を形成し、この筒部１１の両端は外周方向に延出された平板状の鍔部１２が形成されている。この鍔部１２の外周縁１３には上記環状リブ２２を内包されて外周縁１３に剛性をもたせることにより、この鍔部１２が矢印Ｒ方向にある外周縁１３は剛性が高いので、端子ピン３の軸部３１の両端を矢印Ｐ方向およびＱ方向に押圧してＲ方向に延出させて軸部３１の径より大きい径大部３２、３３を形成する際に、矢印Ｒ方向に伸びようとするガスケット１の鍔部１２の応力歪をこの外周縁１３にて少なくするようにしている。このようにして形成された密閉型電池の封口体Ａは、軸部３１の一端の径大部３２に予め金属プレート５を取り付けて後、端子ピン３の軸部３１の他端を端子ピン挿入孔１２に挿入して金属封口板２の表面から突出させ、その他端に金属プレート４を取り付けて金属封口板２の表面に金属プレート４を有するように端子ピン３を配置させた状態で、軸部３１の両端を押圧して他端に径大部３３を形成することにより、端子ピン３を有する密閉型電池の封口体Ｂが得られる。  The annular rib 22 of the metal sealing plate 2 formed in this way is located at the outer peripheral edge 13 portion of the flange portion 12 of the cylindrical portion 11, and the cylindrical portion 11 is disposed at the location of the through hole 21 of the metallic sealing plate 2. By integrally molding the sealing plate 2 and the gasket 1, the cylindrical portion 11 is closely bonded to the inner peripheral surface of the through hole 21 of the metal sealing plate 2 to form a terminal pin insertion hole 14. Both ends are formed with plate-like flanges 12 extending in the outer peripheral direction. Since the outer peripheral edge 13 of the flange 12 includes the annular rib 22 so that the outer peripheral edge 13 has rigidity, the outer peripheral edge 13 in which the flange 12 is in the arrow R direction has high rigidity. When both ends of the shaft portion 31 are pressed in the directions of the arrows P and Q to extend in the R direction to form the large diameter portions 32 and 33 larger than the diameter of the shaft portion 31, an attempt is made to extend in the arrow R direction. The stress distortion of the flange portion 12 of the gasket 1 is reduced at the outer peripheral edge 13. The sealing body A of the sealed battery formed in this way has the metal plate 5 attached in advance to the large-diameter portion 32 at one end of the shaft portion 31, and the other end of the shaft portion 31 of the terminal pin 3 is inserted into the terminal pin. The shaft is inserted into the hole 12 so as to protrude from the surface of the metal sealing plate 2, the metal plate 4 is attached to the other end, and the terminal pins 3 are arranged so as to have the metal plate 4 on the surface of the metal sealing plate 2. By sealing both ends of the portion 31 and forming the large-diameter portion 33 at the other end, a sealed battery B having a terminal pin 3 is obtained.

（実施形態３）
図１３から図１５は、密閉型電池の封口体の異なる実施形態で、特に、外部へ出力する端子を端子ピン自体を用いずに、金属プレート４に設ける端子６の実施形態を示し、Ａは密閉型電池の封口体であり、他の符号は図１から図７に示す実施形態１と同じである。(Embodiment 3)
FIGS. 13 to 15 show different embodiments of the sealing body of the sealed battery, and in particular, an embodiment of the terminal 6 provided on the metal plate 4 without using the terminal pin itself as a terminal for outputting to the outside. It is a sealing body of a sealed battery, and other reference numerals are the same as those in the first embodiment shown in FIGS.

金属プレート４の一部（図では左の部位）を金属封口板２から離れる方向に突出させたリード板４１がガスケット１の外周縁１３の凸壁の内壁に接するかまたは離間して設けられており、端子ピン３との中間位置を折り曲げ加工をして突出させてこの突出させた部位に外部へ出力する端子６が設けられている。  A lead plate 41 in which a part of the metal plate 4 (the left portion in the drawing) protrudes in a direction away from the metal sealing plate 2 is provided in contact with or away from the inner wall of the convex wall of the outer peripheral edge 13 of the gasket 1. In addition, a terminal 6 is provided which is bent at an intermediate position with respect to the terminal pin 3 and protrudes and outputs the projected portion to the outside.

この場合、図１４は、実施形態１の図３と同じ構成の密閉型電池の封口体Ａの断面図を示し、図１５は、端子ピン３の軸部３１の両端を押圧して端子ピン３を矢印Ｐ方向およびＱ方向に押圧してＲ方向に延出して軸部３１の径より大きい径大部３２、３３を形成するように金属封口板２にかしめ固着するが、実施形態２の図９に示す金属封口板２および図１０に示す封口体Ａを適用してもよい。  In this case, FIG. 14 shows a sectional view of the sealing body A of the sealed battery having the same configuration as FIG. 3 of the first embodiment, and FIG. 15 shows the terminal pin 3 by pressing both ends of the shaft portion 31 of the terminal pin 3. Is pressed in the directions of arrows P and Q and extended in the R direction to be caulked and fixed to the metal sealing plate 2 so as to form larger diameter portions 32 and 33 larger than the diameter of the shaft portion 31. You may apply the metal sealing board 2 shown in 9, and the sealing body A shown in FIG.

（実施形態４）
図１６および図１７は、本発明に付加して端子ピン挿入孔１２の部分における改良発明を示し、Ａは密閉型電池の封口体であり、Ｂは端子ピン３を有する密閉型電池の封口体であり、他の符号は図１から図７に示す実施形態１および図１３から図１５に示す実施形態３と同じである。(Embodiment 4)
16 and 17 show an improved invention in the portion of the terminal pin insertion hole 12 in addition to the present invention, wherein A is a sealed battery sealing body and B is a sealed battery sealing body having terminal pins 3. The other reference numerals are the same as those in the first embodiment shown in FIGS. 1 to 7 and the third embodiment shown in FIGS.

密閉型電池の封口体Ａは、密閉型電池Ｃの密閉型電池本体８の開口端８１（図１８参照）を閉じる蓋となる形状で貫通孔２１を有する金属封口板２と、この金属封口板２の表面および貫通孔２１を電気的に絶縁する合成樹脂でできたガスケット１とからなる。ガスケット１は、実施形態１と同様な合成樹脂でできており、金属封口板２の貫通孔２１に密着接合して端子ピン挿入孔１２となる筒部１１とその両端に設けた金属封口板２の表面に密着接合する径大な筒状のできた鍔部１２とからなるが、さらに、この合成樹脂でできた筒部１には、その内部にシリコンゴム、フッ素ゴム、ウレタンゴム、エチレンプロピレンゴムなどのゴム部材からなる環状の芯部７を有し、この芯部７を包囲するように実施形態１と同様な熱可塑性樹脂部材と一体成形されている。  The sealing body A of the sealed battery includes a metal sealing plate 2 having a through hole 21 in a shape that serves as a lid for closing the open end 81 (see FIG. 18) of the sealed battery body 8 of the sealed battery C, and the metal sealing plate. 2 and the gasket 1 made of a synthetic resin that electrically insulates the through hole 21. The gasket 1 is made of a synthetic resin similar to that of the first embodiment, and is formed by tightly joining the through hole 21 of the metal sealing plate 2 to form the terminal pin insertion hole 12 and the metal sealing plates 2 provided at both ends thereof. The cylindrical portion 1 made of a large-diameter cylindrical member that is tightly bonded to the surface of the cylindrical member 1 further includes a cylindrical portion 1 made of this synthetic resin, with silicon rubber, fluorine rubber, urethane rubber, and ethylene propylene rubber inside. An annular core portion 7 made of a rubber member or the like is included, and is integrally formed with a thermoplastic resin member similar to that of the first embodiment so as to surround the core portion 7.

このようにしてできた密閉型電池の封口体Ａは、実施形態３にて示す図１５と同様なかしめ加工により端子ピン３を有する密閉型電池の封口体Ｂが得られる。すなわち、端子ピン３の軸部３１の他端を端子ピン挿入孔１２に挿入して金属封口板２の表面から突出させてその他端に金属プレート４を取り付けて金属封口板２の表面に金属プレート４、５を有するように端子ピン３を配置させた状態で、軸部３１の両端を矢印Ｐ方向およびＱ方向押圧してＲ方向に延出させて他端に径大部３３を形成することにより、図１７に示す端子ピン３を有する密閉型電池の封口体Ｂが得られる。  The sealing body A of the sealed battery thus produced provides a sealed battery sealing body B having the terminal pins 3 by caulking similar to that shown in FIG. That is, the other end of the shaft portion 31 of the terminal pin 3 is inserted into the terminal pin insertion hole 12 so as to protrude from the surface of the metal sealing plate 2 and the metal plate 4 is attached to the other end, and the metal plate is attached to the surface of the metal sealing plate 2. In a state where the terminal pins 3 are arranged so as to have 4 and 5, both ends of the shaft portion 31 are pressed in the directions of arrows P and Q to extend in the R direction, and the large diameter portion 33 is formed at the other end. Thus, a sealed battery B having the terminal pins 3 shown in FIG. 17 is obtained.

この場合、図１７は、実施形態３の図１３と同じ構成の端子ピン３を有する密閉型電池Ｂの断面図を示すが、実施形態１の図１に示す端子ピン３を有する密閉型電池Ｂを適用してもよい。また、実施形態２の図９に示す金属封口板２を適用してもよい。  In this case, FIG. 17 shows a cross-sectional view of the sealed battery B having the terminal pin 3 having the same configuration as that of FIG. 13 of the third embodiment, but the sealed battery B having the terminal pin 3 shown in FIG. May be applied. Moreover, you may apply the metal sealing board 2 shown in FIG.

このようにして、端子ピン３の軸部３１の両端を押圧して端子ピン３がガスケット１を介して金属封口板２にかしめ固着される際、ガスケット１の筒部１１内の芯部７のゴム部材の弾力性により金属封口板２の貫通孔２１に交叉する方向（左右方向）に伸びる押圧力を向上させて、端子ピン３の軸部３１とガスケット１の筒部１１の内周面との間の気密性を維持することができる。さらに、この芯部７のゴム部材の弾力性により金属封口板２の貫通孔の貫通方向（上下方向）に伸びる押圧力を向上させて、ガスケット１の筒部１１の外周面と金属封口板２の貫通孔２１との間の気密性を維持することができるとともに、端子ピン３の径大部３２、３３とガスケット１の筒部１１および鍔部１２との間の密着性を向上させている。しかも、芯部７がゴム部材でできているので、金属封口板２の貫通孔２１の大きさに影響されず、所望の弾性力が得やすい。
（実施形態１から４を適用した密閉型電池）Thus, when both ends of the shaft portion 31 of the terminal pin 3 are pressed and the terminal pin 3 is caulked and fixed to the metal sealing plate 2 via the gasket 1, the core portion 7 in the cylindrical portion 11 of the gasket 1 is fixed. The pressing force extending in the direction (left-right direction) intersecting the through hole 21 of the metal sealing plate 2 is improved by the elasticity of the rubber member, and the shaft portion 31 of the terminal pin 3 and the inner peripheral surface of the cylindrical portion 11 of the gasket 1 The airtightness between can be maintained. Further, the pressing force extending in the penetrating direction (vertical direction) of the through hole of the metal sealing plate 2 is improved by the elasticity of the rubber member of the core portion 7, and the outer peripheral surface of the cylindrical portion 11 of the gasket 1 and the metal sealing plate 2. The airtightness between the through hole 21 and the large diameter portions 32 and 33 of the terminal pin 3 and the adhesion between the cylindrical portion 11 and the flange portion 12 of the gasket 1 can be improved. . Moreover, since the core portion 7 is made of a rubber member, a desired elastic force can be easily obtained without being affected by the size of the through hole 21 of the metal sealing plate 2.
(Sealed battery to which Embodiments 1 to 4 are applied)

図１８において、Ｂは実施形態１から実施形態４に示す端子ピン３を有する密閉型電池の封口体であり、Ｃは密閉型電池でその代表例としてリチウム電池が挙げられる。以下、実施形態１から実施形態４を適用した密閉型電池を説明する。  In FIG. 18, B is a sealing body of a sealed battery having the terminal pins 3 shown in Embodiments 1 to 4, C is a sealed battery, and a typical example thereof is a lithium battery. Hereinafter, a sealed battery to which Embodiments 1 to 4 are applied will be described.

８は、一端が開口した角筒状または円筒状の外殻となる密閉型電池本体で、金属封口板２を有する封口体Ｂで密閉されている。この密閉型電池本体８は端子ピン３の部位を正極端子もしくは負極端子としたとき、その対となって負極端子もしくは正極端子となるように、アルミニウムまたはその合金などの金属部材とするか、または、内表面にアルミニウム箔または蒸着やメッキなどの金属膜が形成された合成樹脂で形成してもよい。この密閉型電池本体８の内部には電解液８２および絶縁体１００にて支持された電極体９が収納されている。この電極体９は、電極の正極もしくは負極と電気接続された前述のリード板５１を有し、図示しないが、リチウム含有コバルト酸化物を活物質とするシート状の正極と、黒鉛を活物質とするシート状の負極とをセパレータを間にして構成されている。  Reference numeral 8 denotes a sealed battery main body which is a rectangular or cylindrical outer shell having one end opened, and is sealed with a sealing body B having a metal sealing plate 2. The sealed battery body 8 is made of a metal member such as aluminum or an alloy thereof so that when the part of the terminal pin 3 is a positive electrode terminal or a negative electrode terminal, it becomes a negative electrode terminal or a positive electrode terminal. The inner surface may be made of an aluminum foil or a synthetic resin having a metal film such as vapor deposition or plating. An electrode body 9 supported by an electrolytic solution 82 and an insulator 100 is accommodated in the sealed battery body 8. This electrode body 9 has the above-described lead plate 51 electrically connected to the positive electrode or negative electrode of the electrode, although not shown, a sheet-like positive electrode using lithium-containing cobalt oxide as an active material, and graphite as an active material. The sheet-like negative electrode is formed with a separator in between.

密閉型電池本体８の開口端８１には、リード板５１が電極体９の電極の正極もしくは負極と接続されるようにかつこの開口端８１が閉じられるように封口体Ｂが設けられており、この開口端８１は封口体Ｂの金属封口板２とレーザ溶接などにより固着されて、密閉型電池本体８の開口端８１が密閉されている。  A sealing body B is provided at the open end 81 of the sealed battery body 8 so that the lead plate 51 is connected to the positive electrode or the negative electrode of the electrode of the electrode body 9 and the open end 81 is closed. The opening end 81 is fixed to the metal sealing plate 2 of the sealing body B by laser welding or the like, and the opening end 81 of the sealed battery body 8 is sealed.

本発明の密閉型電池の封口体およびその封口体を用いた密閉型電池は電極体と外部端子と電気接続をさせる端子ピンを金属封口板にガスケットを介してかしめ固着する密閉型電池に有用である。  The sealing body of the sealed battery of the present invention and the sealed battery using the sealing body are useful for a sealed battery in which a terminal pin for electrically connecting an electrode body and an external terminal is caulked and fixed to a metal sealing plate via a gasket. is there.

１ ガスケット
１１筒部
１２鍔部
１３外周縁
２ 金属封口板
２１貫通孔
３ 端子ピン
３１軸部
３２、３３径大部
４、５金属プレート
７ 芯部
８ 密閉型電池本体DESCRIPTION OF SYMBOLS 1 Gasket 11 Cylindrical part 12 collar part 13 Outer periphery 2 Metal sealing board 21 Through-hole 3 Terminal pin 31 Shaft part 32, 33 diameter large part 4, 5 Metal plate 7 Core part 8 Sealed battery main body

Claims (8)

金属封口板の貫通孔に合成樹脂でできたガスケットの筒部を密着接合させて端子ピン挿入孔となし、前記筒部の両端に同じ合成樹脂で前記金属封口板の両面に密着させて外周方向に延出させた鍔部を有するように金属封口板と一体成形してできた密閉型電池の封口体において、前記鍔部の外周縁に圧縮変形の少ない合成樹脂でできた環状の凸壁を形成して前記外周縁に剛性をもたせたことを特徴とする密閉型電池の封口体。  A cylindrical portion of a gasket made of a synthetic resin is tightly joined to the through hole of the metal sealing plate to form a terminal pin insertion hole, and both ends of the cylindrical portion are closely adhered to both surfaces of the metallic sealing plate with the same synthetic resin. In a sealed battery sealing body formed integrally with a metal sealing plate so as to have a flange extending to the outer periphery, an annular convex wall made of a synthetic resin with little compression deformation is formed on the outer peripheral edge of the flange. A sealing body for a sealed battery, wherein the sealing body is formed so that the outer peripheral edge has rigidity. 前記ガスケットの筒部および鍔部は同じ熱可塑性樹脂でできており、前記鍔部の外周縁は熱硬化性樹脂でできたことを特徴とする請求項１記載の密閉型電池の封口体。  The sealed body of the sealed battery according to claim 1, wherein the cylindrical portion and the flange portion of the gasket are made of the same thermoplastic resin, and the outer peripheral edge of the flange portion is made of a thermosetting resin. 前記ガスケットの筒部および鍔部は同じ熱可塑性樹脂でできており、前記鍔部の外周縁は剛性をもたせる充填剤を含有してなる熱可塑性樹脂でできたことを特徴とする請求項１記載の密閉型電池の封口体。  The cylindrical portion and the flange portion of the gasket are made of the same thermoplastic resin, and the outer peripheral edge of the flange portion is made of a thermoplastic resin containing a filler having rigidity. Sealing body for sealed batteries. 前記金属封口板にはその両面から突出した環状リブを形成してあり、前記鍔部を金属封口板の両面に密着接合させるに際し、前記鍔部の外周縁が前記環状リブを内包してガスケットと金属封口板とを一体成形してできたことを特徴とする請求項１から３の何れかひとつに記載の密閉型電池の封口体。  The metal sealing plate is formed with annular ribs projecting from both surfaces thereof, and when the flange portion is tightly bonded to both surfaces of the metal sealing plate, an outer peripheral edge of the flange portion encloses the annular rib and a gasket. 4. The sealed battery sealing body according to claim 1, wherein the metal sealing plate is integrally formed with the metal sealing plate. 前記筒部には内部にゴム部材からなる芯部を備えたことを特徴とする請求項１から４の何れかひとつに記載の密閉型電池の封口体。  The sealed body for a sealed battery according to any one of claims 1 to 4, wherein the cylindrical portion includes a core portion made of a rubber member. 請求項１から５の何れかひとつに記載の密閉型電池の封口体で、その端子ピン挿入孔に端子ピンの軸部を挿入して前記軸部の両端が突出するように前記金属封口板に端子ピンを配置させた状態で、前記軸部の両端を押圧して端子ピンをかしめることにより形成した軸部の径より大きい径大部が前記ガスケットの筒部の鍔部に密着接合されてなり、端子ピンを前記金属封口板から電気的に絶縁させてできた密閉型電池の端子ピン付き封口体であって、前記端子ピンの径大部の外側に前記鍔部の外周縁があることを特徴とする密閉型電池の端子ピン付き封口体。  6. A sealing body for a sealed battery according to claim 1, wherein the metal sealing plate has a terminal pin shaft hole inserted into the terminal pin insertion hole so that both ends of the shaft portion protrude. In a state where the terminal pin is arranged, a large diameter portion larger than the diameter of the shaft portion formed by pressing the both ends of the shaft portion and caulking the terminal pin is closely bonded to the flange portion of the cylindrical portion of the gasket. A sealing pin with a terminal pin of a sealed battery made by electrically insulating the terminal pin from the metal sealing plate, wherein the outer peripheral edge of the flange portion is outside the large diameter portion of the terminal pin. Sealing body with terminal pin of sealed battery characterized by 請求項１から５の何れかひとつに記載の密閉型電池の封口体で、端子ピンの軸部の少なくとも一端に金属プレートを有し、前記端子ピン挿入孔に端子ピンの軸部を挿入して前記軸部の両端が突出するように前記金属封口板に端子ピンを配置させた状態で、前記軸部の両端を押圧して前記金属プレートを介して端子ピンをかしめることにより形成した軸部の径より大きい径大部が前記金属プレートを介して前記ガスケットの筒部の鍔部に密着接合されてなり、端子ピンおよび前記金属プレートを前記金属封口板から電気的に絶縁させてできた密閉型電池の端子ピン付き封口体であって、前記金属プレートの外側に前記鍔部の外周縁があることを特徴とする密閉型電池の端子ピン付き封口体。  6. A sealed battery sealing body according to claim 1, wherein a metal plate is provided on at least one end of the shaft portion of the terminal pin, and the shaft portion of the terminal pin is inserted into the terminal pin insertion hole. A shaft portion formed by pressing both ends of the shaft portion and crimping the terminal pin through the metal plate in a state where the terminal pins are arranged on the metal sealing plate so that both ends of the shaft portion protrude. A large-diameter portion larger than the diameter is tightly joined to the flange portion of the cylindrical portion of the gasket via the metal plate, and the terminal pin and the metal plate are electrically insulated from the metal sealing plate. A sealed body with terminal pins for a sealed battery, wherein the outer peripheral edge of the flange is on the outside of the metal plate. 請求項６または７に記載の密閉型電池の端子ピン付き封口体を電解液と電極を有する密閉型電池本体の開口端に設けた密閉型電池であって、前記端子ピンまたは金属プレートと密閉型電池本体内の電極とを接続させるとともに前記金属封口板または密閉型電池本体と密閉型電池本体内の他の電極とを接続させて端子ピン付き封口体を密閉型電池本体の開口端に設けて、密閉型電池本体と金属封口板とを気密性をもたせて固着したことを特徴とする密閉型電池。  A sealed battery in which the sealing body with terminal pins of the sealed battery according to claim 6 or 7 is provided at an open end of a sealed battery body having an electrolyte and an electrode, wherein the terminal pin or the metal plate and the sealed battery are sealed. Connect the electrode in the battery body and connect the metal sealing plate or the sealed battery body to the other electrode in the sealed battery body to provide a sealing body with terminal pins at the open end of the sealed battery body. A sealed battery characterized in that the sealed battery body and the metal sealing plate are fixed in an airtight manner.
JP2011114153A 2011-04-28 2011-04-28 Sealed battery and sealing body thereof Withdrawn JP2012234785A (en)

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