JPWO2018097285A1 - Terminal structure and washer - Google Patents

Terminal structure and washer Download PDF

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JPWO2018097285A1
JPWO2018097285A1 JP2018552997A JP2018552997A JPWO2018097285A1 JP WO2018097285 A1 JPWO2018097285 A1 JP WO2018097285A1 JP 2018552997 A JP2018552997 A JP 2018552997A JP 2018552997 A JP2018552997 A JP 2018552997A JP WO2018097285 A1 JPWO2018097285 A1 JP WO2018097285A1
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Prior art keywords
terminal
washer
fitted
fitting
lid member
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聖治 金光
聖治 金光
智史 釘野
智史 釘野
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Showa Denko Materials Co Ltd
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Hitachi Chemical Co Ltd
Showa Denko Materials Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

ワッシャを用いてしかも部品点数を増やすことなく、しかも端子部材を大型化することなく、端子部材の回り止めを実現することができる端子構造を提供することにある。第１の回り止め嵌合構造５ｂ，１５ｃにより蓋部材５に対してワッシャ１５，１７が回動することを阻止する。第２の回り止め嵌合構造１１ｅ，１５ｆによりワッシャ１５，１７に対して端子部材１１，１３が回動することを阻止する。特別に部品を準備することなく、端子部材１１，１３の回り止めを実現する。An object of the present invention is to provide a terminal structure that can prevent the terminal member from rotating without using a washer and without increasing the number of parts and without increasing the size of the terminal member. The washers 15 and 17 are prevented from rotating with respect to the lid member 5 by the first detent fitting structures 5b and 15c. The second detent fitting structures 11e and 15f prevent the terminal members 11 and 13 from rotating with respect to the washers 15 and 17. The terminal members 11 and 13 can be prevented from rotating without specially preparing parts.

Description

本発明は、端子構造及びワッシャに関するものである。   The present invention relates to a terminal structure and a washer.

特開２０００−７７０５３号公報（特許文献１）の図５及びＷＯ２０１２／０３９４２３号公報（特許文献２）の図７には、電池容器の蓋部材と端子部材の端子部に螺合されるナットとの間に配置されて蓋部材とナットとの間を電気的に絶縁する環状のフランジ部と、端子部に嵌合され且つ蓋部材の端子貫通孔に嵌合されて、端子部と蓋部材との間を電気的に絶縁する筒状部とを一体に備えた絶縁部材（ワッシャ）を備えたリチウムイオン電池等の非水電解液二次電池が開示されている。しかしながらこれらの公報には、絶縁部材及び端子部材の回り止めについては記載されていない。特開２０１４−７２１４５号公報（特許文献３）の図１には、蓋部材に固定されたピン部材を端子部材のタブ溶接部と係止して端子部材が回ることを防止する回り止め構造が開示されている。   FIG. 5 of Japanese Patent Laid-Open No. 2000-77053 (Patent Document 1) and FIG. 7 of WO 2012/039423 (Patent Document 2) include a nut screwed to a lid member of a battery container and a terminal portion of a terminal member. An annular flange portion that is disposed between and electrically insulating between the lid member and the nut, and fitted into the terminal portion and fitted into the terminal through hole of the lid member, the terminal portion and the lid member A non-aqueous electrolyte secondary battery such as a lithium ion battery provided with an insulating member (washer) integrally provided with a cylindrical portion that electrically insulates the battery is disclosed. However, these publications do not describe the detent of the insulating member and the terminal member. In FIG. 1 of Japanese Patent Application Laid-Open No. 2014-72145 (Patent Document 3), there is a rotation prevention structure that locks the pin member fixed to the lid member with the tab welded portion of the terminal member to prevent the terminal member from turning. It is disclosed.

特開２０００−７７０５３号公報JP 2000-77053 A ＷＯ２０１２／０３９４２３号公報WO2012 / 039423 特開２０１４−７２１４５号公報JP 2014-72145 A

特許文献１及び２に示された二次電池のように、フランジ部と筒状部とが一体化された絶縁部材（ワッシャ）を設けると部品点数を少なくすることができる。しかしながら一体化され絶縁部材を用いても、特許文献３に記載のような回り止め構造を用いると結果的に部品点数が増加することになる上、ピン部材の係止のために端子部材のタブ溶接部の形状を大きくする必要があった。   As in the secondary batteries disclosed in Patent Documents 1 and 2, if an insulating member (washer) in which the flange portion and the cylindrical portion are integrated is provided, the number of components can be reduced. However, even if an integrated insulating member is used, if the anti-rotation structure as described in Patent Document 3 is used, the number of parts increases as a result, and the tab of the terminal member is used for locking the pin member. It was necessary to enlarge the shape of the weld.

本発明の目的は、部品点数の増加、端子部材の大型化をせずに、端子部材の回り止めを実現することができる端子構造を提供することにある。   The objective of this invention is providing the terminal structure which can implement | achieve rotation prevention of a terminal member, without increasing the number of components and enlarging a terminal member.

本発明の他の目的は、端子構造に適用可能なワッシャと嵌合する部材の回転を防止できるワッシャを提供することにある。   Another object of the present invention is to provide a washer capable of preventing rotation of a member fitted to a washer applicable to a terminal structure.

本発明は、端子貫通孔を有する蓋部材と、蓋部材の端子貫通孔に嵌合される筒状部を一体に備えたワッシャと、ワッシャの筒状部に嵌合された端子部を有する端子部材と、端子部材の端子部にナットが螺合されてなる端子構造を改良の対象とする。   The present invention relates to a lid member having a terminal through-hole, a washer integrally provided with a cylindrical portion fitted into the terminal through-hole of the lid member, and a terminal having a terminal portion fitted into the cylindrical portion of the washer. A terminal structure in which a nut is screwed to a member and a terminal portion of the terminal member is an object of improvement.

本発明の端子構造では、蓋部材の端子貫通孔とワッシャの筒状部には、ワッシャが蓋部材に対して端子部材を中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成する第１の嵌合構成部がそれぞれ形成されている。またワッシャの筒状部と端子部材との間には、ワッシャに対して端子部材が回動することを嵌合により阻止する第２の回り止め嵌合構造を構成する第２の嵌合構成部がそれぞれ形成されている。本発明によれば、第１の回り止め嵌合構造により蓋部材に対してワッシャが回動することを阻止し、第２の回り止め嵌合構造によりワッシャに対して端子部材が回動することを阻止する。特に、本発明では、第１の回り止め嵌合構造を蓋部材の端子貫通孔とワッシャの筒状部にそれぞれ設けた第１の嵌合構成部により形成し、第２の回り止め嵌合構造をワッシャの筒状部と端子部材とにそれぞれ設けた第２の嵌合構成部により形成したので、特別に部品を準備することなく、端子部材の回り止めを実現することができる。   In the terminal structure of the present invention, the terminal through hole of the lid member and the cylindrical portion of the washer are fitted with a first detent fitting that prevents the washer from rotating about the terminal member with respect to the lid member by fitting. A first fitting component that constitutes the combined structure is formed. Further, a second fitting component that constitutes a second detent fitting structure that prevents the terminal member from rotating with respect to the washer by fitting between the tubular portion of the washer and the terminal member. Are formed respectively. According to the present invention, the first detent fitting structure prevents the washer from rotating relative to the lid member, and the second detent fitting structure prevents the terminal member from rotating relative to the washer. To prevent. In particular, in the present invention, the first detent fitting structure is formed by the first fitting components provided respectively in the terminal through hole of the lid member and the cylindrical portion of the washer, and the second detent fitting structure Is formed by the second fitting components provided in the cylindrical part of the washer and the terminal member, respectively, so that the terminal member can be prevented from rotating without specially preparing parts.

第１の回り止め嵌合構造の構成は任意であるが、端子貫通孔の内周部に、端子貫通孔の径方向に延びる第１の嵌合部または第１の被嵌合部が前記第１の嵌合構成部として一体に形成されており、ワッシャの筒状部の外周部に、第１の嵌合部または第１の被嵌合部と嵌合する第２の被嵌合部または第２の嵌合部が一体に形成されているのが好ましい。このような構成を採用すると、簡単に第１の回り止め嵌合構造を実現できる。   The configuration of the first detent fitting structure is arbitrary, but the first fitting portion or the first fitted portion extending in the radial direction of the terminal through hole is provided on the inner peripheral portion of the terminal through hole. A second fitted portion that is integrally formed as a first fitting component and is fitted to the outer peripheral portion of the tubular portion of the washer with the first fitted portion or the first fitted portion; It is preferable that the second fitting portion is integrally formed. If such a configuration is employed, the first detent fitting structure can be easily realized.

第２の回り止め嵌合構造の構成は任意であるが、端子部材の外周部に、端子部の径方向に延びる第３の嵌合部または第３の被嵌合部が第２の嵌合構成部として一体に形成されており、ワッシャの筒状部の内周部に、第３の嵌合部または第３の被嵌合部と嵌合する第４の被嵌合部または第４の嵌合部が一体に形成されているのが好ましい。このような構成を採用すると、簡単に第２の回り止め嵌合構造を実現できる。   The configuration of the second detent fitting structure is arbitrary, but the third fitting portion or the third fitted portion extending in the radial direction of the terminal portion is fitted to the outer peripheral portion of the terminal member. It is integrally formed as a constituent part, and a fourth fitted part or a fourth part fitted to the third fitting part or the third fitted part on the inner peripheral part of the cylindrical part of the washer. It is preferable that the fitting portion is integrally formed. By adopting such a configuration, the second detent fitting structure can be easily realized.

また蓋部材の端子貫通孔から蓋部材の裏側に突出するワッシャの筒状部の端部部分の外側にオーリングが嵌合されているのが好ましい。この構造では、ワッシャにより、オーリングの位置の規制を図ることができる。したがってオーリングの位置の規制に別部品を用いる必要性がなくなる。   Moreover, it is preferable that an O-ring is fitted to the outside of the end portion of the tubular portion of the washer protruding from the terminal through hole of the lid member to the back side of the lid member. In this structure, the O-ring position can be regulated by the washer. Therefore, it is not necessary to use a separate part for regulating the O-ring position.

さらに蓋部材の前記裏面側に位置する端子部材の一部には、ワッシャの筒状部が外接する拡径部が一体に設けられているのが好ましい。筒状部が基部の拡径部に外接することにより、
この場合、端子部の拡径部に第３の被嵌合部が被接触平面として形成されており、ワッシャの筒状部の第４の嵌合部には、被接触平面と接触する接触平面を備えているのが好ましい。この構成を採用すると、第３の被嵌合部及び第４の嵌合部の強度の低下を防止できる。Further, it is preferable that a part of the terminal member located on the back surface side of the lid member is integrally provided with an enlarged diameter portion that circumscribes the cylindrical portion of the washer. When the cylindrical part circumscribes the enlarged diameter part of the base,
In this case, the third fitted portion is formed as a contacted flat surface in the enlarged diameter portion of the terminal portion, and the fourth fitting portion of the washer tubular portion is in contact with the contacted flat surface. Is preferably provided. If this structure is employ | adopted, the fall of the intensity | strength of a 3rd to-be-fitted part and a 4th fitting part can be prevented.

また端子部材の拡径部と連続し且つ径方向外側に拡がる基部（二次電池の場合にはタブ溶接部）には、蓋部材側に向かって開口し且つワッシャの筒状部の端部部分及びオーリングが入る環状の溝部が形成されているのが好ましい。この環状の溝部も、オーリングの位置を規制するので、部品点数の削減に寄与する。   Also, the base portion (in the case of a secondary battery, a tab welded portion) that is continuous with the enlarged diameter portion of the terminal member and expands outward in the radial direction is open toward the lid member side and the end portion of the tubular portion of the washer And it is preferable that the annular groove part into which an O-ring enters is formed. This annular groove also regulates the position of the O-ring, which contributes to a reduction in the number of parts.

電池容器の両端に正極端子部材と負極端子部材が配置される二次電池に本発明が適用される場合には、正極端子部材と負極端子部材の両方に対して、上記と同じ構成を採用できるのは勿論である。
本発明のワッシャは、端子部材の端子部が貫通する貫通孔を備えた筒状部を有する。そしてワッシャには、筒状部の外周部にワッシャの回動を阻止する第１の嵌合構成部が形成されており、筒状部の内周部に端子部材の回動を阻止する第２の嵌合構成部が形成されている。When the present invention is applied to a secondary battery in which a positive electrode terminal member and a negative electrode terminal member are disposed at both ends of the battery container, the same configuration as described above can be adopted for both the positive electrode terminal member and the negative electrode terminal member. Of course.
The washer according to the present invention has a cylindrical portion having a through hole through which the terminal portion of the terminal member passes. In the washer, a first fitting component that prevents the washer from rotating is formed on the outer peripheral portion of the cylindrical portion, and a second that prevents the terminal member from rotating on the inner peripheral portion of the cylindrical portion. The fitting component is formed.

本発明をリチウムイオン二次電池に適用した一実施の形態をその長手方向に沿って切断し且つ一部を省略して示した断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment in which the present invention is applied to a lithium ion secondary battery, cut along the longitudinal direction and partially omitted. ナットを締め付ける前の二次電池の側面図である。It is a side view of the secondary battery before tightening a nut. 本実施の形態で用いる電極群を捲回する状態を示す図である。It is a figure which shows the state which winds the electrode group used by this Embodiment. （Ａ）はワッシャの平面図、（Ｂ）はワッシャの側面図、（Ｃ）は（Ａ）のＡ−Ａ線断面図、（Ｄ）は（Ａ）のＢ−Ｂ線断面図である。(A) is a plan view of the washer, (B) is a side view of the washer, (C) is a cross-sectional view taken along line AA of (A), and (D) is a cross-sectional view taken along line BB of (A). （Ｅ）は正極端子部材の正面図、（Ｆ）は（Ｇ）のＢ−Ｂ線断面図、（Ｇ）は正極端子部材の平面図である。(E) is a front view of a positive electrode terminal member, (F) is a sectional view taken along line BB of (G), and (G) is a plan view of the positive electrode terminal member. 正極端子部材，オーリング，蓋部材，ワッシャ，ナットからなる分解斜視図である。It is a disassembled perspective view which consists of a positive electrode terminal member, an O ring, a cover member, a washer, and a nut.

以下、図面を参照して本発明の実施の形態を詳細に説明する。図１は、本発明をリチウムイオン二次電池に適用した一実施の形態をその長手方向に沿って切断し且つ一部を省略して示した断面図である。なお図１においては、リチウムイオン二次電池の構成部材の一部の図示を省略してある。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment in which the present invention is applied to a lithium ion secondary battery, cut along the longitudinal direction and partially omitted. In FIG. 1, some of the constituent members of the lithium ion secondary battery are not shown.

〈リチウムイオン二次電池の全体構成〉
本実施の形態のリチウムイオン二次電池１は、電池容器本体３と、正極側電池蓋（単に蓋部材ともいう）５と、負極側電池蓋７と、電解液に浸潤されて軸芯８に正極電極と負極電極とが捲回されてなる電極群９と、正極端子部材１１と、負極端子部材１３と、絶縁部材からなるワッシャ１５及び１７と、ナット１９及び２１と、オーリング２３及び２５を備えている。容器本体３内には、非水電解液（図示せず）が注入されている。従って、電極群９には、非水電解液が浸潤している。なお、図１においては理解を容易にするため、リチウムイオン電池の一部の寸法を誇張して示している。また図２は、後述するナットを締め付ける前の二次電池の側面図を示している。<Overall configuration of lithium-ion secondary battery>
The lithium ion secondary battery 1 according to the present embodiment includes a battery container body 3, a positive battery lid (also simply referred to as a lid member) 5, a negative battery lid 7, and a shaft 8 infiltrated with an electrolyte solution. Electrode group 9 formed by winding the positive electrode and the negative electrode, positive electrode terminal member 11, negative electrode terminal member 13, washers 15 and 17 made of insulating members, nuts 19 and 21, and o-rings 23 and 25 It has. A non-aqueous electrolyte (not shown) is injected into the container body 3. Accordingly, the electrode group 9 is infiltrated with the non-aqueous electrolyte. In FIG. 1, some dimensions of the lithium ion battery are exaggerated for easy understanding. FIG. 2 shows a side view of the secondary battery before tightening a nut to be described later.

電池容器本体３は、ニッケルメッキが施されたスチール材料により両端が開口した円筒形状を有している。電池容器本体３の両端の開口部は、正極側電池蓋５及び負極側電池蓋７とによりそれぞれ塞がれている。正極側電池蓋５及び負極側電池蓋７は、ガス排出口６を備えており、その中央部には、端子貫通孔５ａ及び７ａがそれぞれ設けられている。ガス排出口６は、例えば特開平１１−２７３６５０号公報に示される安全弁構造と同様に、図示しない開裂形安全弁により塞がれており、開裂形安全弁は弁押え環により保持されている。安全弁は、電池容器本体内でガスが発生することにより、電池容器本体内の圧力が一定以上となると、開裂状態となって発生したガスを放出する。端子貫通孔５ａ及び７ａには、後述する正極端子部材１１の端子部１１ｃ及び負極端子部材１３の端子部１３ｃが貫通している。   The battery container body 3 has a cylindrical shape with both ends opened by a nickel-plated steel material. Openings at both ends of the battery container body 3 are respectively closed by the positive battery cover 5 and the negative battery cover 7. The positive electrode side battery cover 5 and the negative electrode side battery cover 7 are provided with a gas discharge port 6, and terminal through holes 5 a and 7 a are respectively provided in the center thereof. The gas discharge port 6 is closed by a cleaving safety valve (not shown) as in the safety valve structure disclosed in, for example, Japanese Patent Application Laid-Open No. 11-273650, and the cleaving safety valve is held by a valve retainer ring. When the pressure in the battery container body exceeds a certain level due to the generation of gas in the battery container body, the safety valve is in a cleaved state and releases the generated gas. A terminal portion 11c of the positive electrode terminal member 11 and a terminal portion 13c of the negative electrode terminal member 13, which will be described later, pass through the terminal through holes 5a and 7a.

図３は、本実施の形態で用いる電極群９を捲回する状態を示す図である。電極群９は、帯状の正極電極９１と帯状の負極電極９２とを、セパレータ９３を介して中空円筒状の軸芯８を中心として断面渦巻き状に捲回することにより構成されている。本実施の形態の正極電極９１は、正極集電板としてのアルミニウム箔の両面に、リチウム遷移金属複酸化物であるマンガン酸リチウムを含む正極活物質を略均質に塗布した構成となっている。アルミニウム箔の長手方向の一方の辺側には、正極合剤が塗装されていない未塗着部９４が形成されている。未塗着部９４は、櫛歯状に切り欠かれており、切り欠かれた残部により、正極タブ９５が形成されている。   FIG. 3 is a diagram showing a state in which the electrode group 9 used in the present embodiment is wound. The electrode group 9 is configured by winding a belt-like positive electrode 91 and a belt-like negative electrode 92 in a spiral shape with a hollow cylindrical shaft core 8 as a center through a separator 93. The positive electrode 91 of the present embodiment has a configuration in which a positive electrode active material containing lithium manganate, which is a lithium transition metal double oxide, is applied almost uniformly on both surfaces of an aluminum foil serving as a positive electrode current collector plate. On one side in the longitudinal direction of the aluminum foil, an uncoated portion 94 that is not coated with the positive electrode mixture is formed. The uncoated portion 94 is cut out in a comb-like shape, and a positive electrode tab 95 is formed by the remaining portion cut out.

負極電極９２は、負極集電板としての圧延銅箔の両面に、負極活物質としてリチウムイオンを吸蔵・放出可能な炭素粉末を含む負極合剤を略均質に塗布した構成となっている。負極活物質は、電極群を捲回したときに正極電極９１の正極活物質の全体がセパレータを介して負極活物質と対向するように、負極版に塗布されている。そのため、負極活物質の軸方向の長さは、正極活物質の軸方向よりも長く形成されている。銅箔の長手方向の一方の辺側には、負極合剤が塗装されていない未塗着部９６が形成されている。未塗着部は、櫛歯状に切り欠かれており、切り欠かれた残部により、負極タブ９７が形成されている。負極タブ９７は、正極タブ９５が形成された辺側と対向する辺側に形成される。正極側電池蓋５側に複数の正極タブ９５が位置し、負極側電池蓋７側に複数の負極タブ９７が位置している。   The negative electrode 92 has a configuration in which a negative electrode mixture containing carbon powder capable of occluding and releasing lithium ions as a negative electrode active material is applied almost uniformly on both surfaces of a rolled copper foil as a negative electrode current collector. The negative electrode active material is applied to the negative electrode plate so that the entire positive electrode active material of the positive electrode 91 faces the negative electrode active material through the separator when the electrode group is wound. Therefore, the length of the negative electrode active material in the axial direction is longer than that of the positive electrode active material. On one side in the longitudinal direction of the copper foil, an uncoated portion 96 that is not coated with the negative electrode mixture is formed. The uncoated part is cut out in a comb-like shape, and a negative electrode tab 97 is formed by the remaining part cut out. The negative electrode tab 97 is formed on the side opposite to the side on which the positive electrode tab 95 is formed. A plurality of positive electrode tabs 95 are located on the positive electrode side battery lid 5 side, and a plurality of negative electrode tabs 97 are located on the negative electrode side battery lid 7 side.

セパレータ９３は、リチウムイオンが通過可能なポリエチレン製の多孔質材により形成されている。セパレータ９３は、正極電極９１及び負極電極９２が互いに接触することを防止する。軸芯８はポリプロピレン樹脂により中空円筒状に形成されている。軸芯８の内周面の軸線方向の両端部には、軸線方向に開口する被嵌合部８１及び８２がそれぞれ設けられている。なお、正極電極９１、負極電極９２及びセパレータ９３の詳細な構成については、本発明の要旨とは関係しないので、説明を省略する。   The separator 93 is formed of a polyethylene porous material through which lithium ions can pass. The separator 93 prevents the positive electrode 91 and the negative electrode 92 from contacting each other. The shaft core 8 is formed in a hollow cylindrical shape from polypropylene resin. At both ends of the inner peripheral surface of the shaft core 8 in the axial direction, fitted portions 81 and 82 that open in the axial direction are provided. Note that the detailed configuration of the positive electrode 91, the negative electrode 92, and the separator 93 is not related to the gist of the present invention, and thus the description thereof is omitted.

（ワッシャ）
本実施形態で用いるワッシャ１５及び１７について説明する。正極側電池蓋５及び負極側電池蓋７の端子貫通孔５ａ及び７ａには、ワッシャ１５及び１７が嵌合されている。ワッシャ１５及び１７は、蓋部材５及び７とナット１９及び２１との間に配置されている。(Washer)
The washer 15 and 17 used in this embodiment will be described. Washers 15 and 17 are fitted in the terminal through holes 5 a and 7 a of the positive battery cover 5 and the negative battery cover 7. Washers 15 and 17 are disposed between the lid members 5 and 7 and the nuts 19 and 21.

ワッシャ１５及び１７は、環状のフランジ部１５ａ及び１７ａと、筒状部１５ｂ及び１７ｂとを一体に備えている。フランジ部１５ａ及び１７ａは、蓋部材５及び７とナット１９及び２１との間を電気的に絶縁し、筒状部１５ｂ及び１７ｂは、端子部１１ｃ及び１３ｃに嵌合され且つ端子貫通孔５ａ及び７ａに嵌合されて、端子部１１ｃ及び１３ｃと蓋部材５及び７との間を電気的に絶縁する。ワッシャ１５（１７）は、電気絶縁性と耐電解液性とを有する樹脂材料又はゴム材料により成形された絶縁部材である。   Washers 15 and 17 are integrally provided with annular flange portions 15a and 17a and cylindrical portions 15b and 17b. The flange portions 15a and 17a electrically insulate between the lid members 5 and 7 and the nuts 19 and 21, and the cylindrical portions 15b and 17b are fitted to the terminal portions 11c and 13c and the terminal through holes 5a and 7a is fitted to electrically insulate between the terminal portions 11c and 13c and the lid members 5 and 7. The washer 15 (17) is an insulating member formed of a resin material or rubber material having electrical insulation properties and electrolytic solution resistance.

〈正極端子部材及び負極端子部材〉
本実施形態の正極端子部材１１及び負極端子部材１３は、軸芯嵌合部１１ａ及び１３ａと、タブが溶接されるタブ溶接部１１ｂ及び１３ｂと、ネジ付きの端子部１１ｃ及び１３ｃとを備えている。ネジ付きの端子部１１ｃ及び１３ｃは、軸芯嵌合部１１ａ及び１３ａが延びる方向とは反対側に延びて蓋部材５及び７に形成された端子貫通孔５ａ及び７ａに貫通されている。<Positive electrode terminal member and negative electrode terminal member>
The positive electrode terminal member 11 and the negative electrode terminal member 13 of the present embodiment include shaft core fitting portions 11a and 13a, tab weld portions 11b and 13b to which tabs are welded, and screwed terminal portions 11c and 13c. Yes. The screwed terminal portions 11c and 13c extend through the terminal through holes 5a and 7a formed in the lid members 5 and 7 so as to extend in a direction opposite to the extending direction of the shaft core fitting portions 11a and 13a.

ナット１９及び２１は、ネジ付きの端子部１１ｃ及び１３ｃのネジ部に螺合される。また、オーリング２３及び２５は、ゴム材料によって成形されて、タブ溶接部１１ｂ及び１３ｂ（端子部材の基部）の環状の溝部１１ｆ及び溝部１３ｆと蓋部材５及び７との間で圧縮された状態で配置される。   The nuts 19 and 21 are screwed into the screw portions of the terminal portions 11c and 13c with screws. Further, the O-rings 23 and 25 are formed of a rubber material and compressed between the annular grooves 11f and 13f of the tab welded portions 11b and 13b (base portions of the terminal members) and the lid members 5 and 7. It is arranged with.

〈第１の回り止め嵌合構造及び第２の回り止め嵌合構造〉
本実施の形態では、蓋部材５及び７の端子貫通孔５ａ及び７ａとワッシャ１５及び１７の筒状部１５ｂ及び１７ｂには、ワッシャ１５及び１７が蓋部材５及び７に対して端子部１１ｃ及び１３ｃを中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成する後に説明する第１の嵌合構成部（５ｂ，１５ｃ）がそれぞれ形成されている。またワッシャ１５及び１７の筒状部１５ｂ及び１７ｂと端子部材１１及び１３との間には、ワッシャ１５及び１７に対して端子部１１ｃ及び１３ｃが回動することを嵌合により阻止する第２の回り止め嵌合構造を構成する後に説明する第２の嵌合構成部（１１ｅ，１５ｄ）がそれぞれ形成されている。<First detent fitting structure and second detent fitting structure>
In the present embodiment, the terminal through holes 5a and 7a of the lid members 5 and 7 and the cylindrical portions 15b and 17b of the washers 15 and 17 are connected to the terminal portions 11c and 17 with respect to the lid members 5 and 7. First fitting components (5b, 15c) which will be described later are formed to constitute a first detent fitting structure that prevents the rotation around 13c by fitting. Further, a second portion that prevents the terminal portions 11c and 13c from rotating with respect to the washers 15 and 17 is fitted between the cylindrical portions 15b and 17b of the washers 15 and 17 and the terminal members 11 and 13. Second fitting components (11e, 15d), which will be described later after forming the detent fitting structure, are formed.

次に第１の回り止め嵌合構造を構成する２つの第１の嵌合構成部（５ｂ，１５ｃ）及び第２の回り止め嵌合構造を構成する２つの第２の嵌合構成部（１１ｅ，１５ｄ）について説明する。なお負極側の端子嵌合構造は、正極側の端子嵌合構造と同じであるため、代表して正極側の端子嵌合構造について説明する。説明のために、図４乃至図６を参照する。図４（Ａ）はワッシャ１５の平面図を示しており、図４（Ｂ）はワッシャ１５の側面図を示しており、図４（Ｃ）は図４（Ａ）のＡ−Ａ線断面図を示しており、図４（Ｄ）は図４（Ａ）のＢ−Ｂ線断面図を示している。また図５（Ｅ）は正極端子部材１１の正面図、図５（Ｆ）は図５（Ｇ）のＢ−Ｂ線断面図、図５（Ｇ）は正極端子部材１１の平面図を示している。さらに図６には、正極端子部材１１，オーリング２３，蓋部材５，ワッシャ１５，ナット１９の分解斜視図を示してある。   Next, two first fitting components (5b, 15c) constituting the first detent fitting structure and two second fitting components (11e) constituting the second detent fitting structure , 15d). Since the terminal fitting structure on the negative electrode side is the same as the terminal fitting structure on the positive electrode side, the terminal fitting structure on the positive electrode side will be described as a representative. For explanation, reference is made to FIGS. 4A shows a plan view of the washer 15, FIG. 4B shows a side view of the washer 15, and FIG. 4C is a cross-sectional view taken along line AA in FIG. 4A. FIG. 4D is a cross-sectional view taken along line BB in FIG. 5 (E) is a front view of the positive electrode terminal member 11, FIG. 5 (F) is a cross-sectional view taken along line BB of FIG. 5 (G), and FIG. 5 (G) is a plan view of the positive electrode terminal member 11. Yes. FIG. 6 is an exploded perspective view of the positive electrode terminal member 11, the O-ring 23, the lid member 5, the washer 15, and the nut 19.

〈第１の回り止め嵌合構造〉
ワッシャ１５が蓋部材５に対して端子部材１１を中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成する２つの第１の嵌合構成部について説明する。図１及び図６に示すように、蓋部材５の端子貫通孔５ａの内周部に、端子貫通孔５ａの径方向内側に延びる凸部（第１の嵌合部）５ｂが蓋部材５側の第１の嵌合構成部として一体に形成されている。そしてワッシャ１５の筒状部１５ｂの外周部には、凸部（第１の嵌合部）５ｂと嵌合する溝（第１の被嵌合部）１５ｃがワッシャ１５側の第１の嵌合構成部として形成されている。溝１５ｃは、筒状部１５ｂの径方向外側に向かう方向とフランジ部１５ａから離れる方向に向かって開口している。そして溝１５ｃの横断面形状は、凸部５ｂの輪郭形状と相似形になっている。なお凸部５ｂ及び溝１５ｃの形状は、凸部５ｂが溝１５ｃに殆ど隙間無く嵌合できるものであれば、どのような形状であってもよく、本実施の形態の形状に限定されるものではない。本実施の形態とは逆に、端子貫通孔の内周部に、端子貫通孔５ａの径方向外側に延びる第１の被嵌合部（溝）が第１の嵌合構成部として一体に形成されており、ワッシャ１５の筒状部１５ｂの外周部に、第１の被嵌合部と嵌合する第２の嵌合部（凸部）が一体に形成されていてもよいのは勿論である。<First detent fitting structure>
Two first fitting components constituting the first detent fitting structure that prevents the washer 15 from rotating around the terminal member 11 with respect to the lid member 5 by fitting will be described. As shown in FIGS. 1 and 6, a convex portion (first fitting portion) 5 b extending radially inward of the terminal through-hole 5 a is provided on the inner side of the terminal through-hole 5 a of the lid member 5. Are integrally formed as a first fitting component. A groove (first fitted portion) 15c that fits with the convex portion (first fitting portion) 5b is provided on the outer peripheral portion of the cylindrical portion 15b of the washer 15 in the first fitting on the washer 15 side. It is formed as a component. The groove 15c is opened in a direction toward the radially outer side of the cylindrical portion 15b and in a direction away from the flange portion 15a. And the cross-sectional shape of the groove | channel 15c is similar to the outline shape of the convex part 5b. The shape of the convex portion 5b and the groove 15c may be any shape as long as the convex portion 5b can be fitted into the groove 15c with almost no gap, and is limited to the shape of the present embodiment. is not. Contrary to the present embodiment, a first fitted portion (groove) extending outward in the radial direction of the terminal through hole 5a is integrally formed as a first fitting component on the inner peripheral portion of the terminal through hole. Of course, a second fitting portion (convex portion) that fits with the first fitted portion may be integrally formed on the outer peripheral portion of the cylindrical portion 15b of the washer 15. is there.

（第２の回り止め嵌合構造）
次にワッシャ１５に対して端子部材１１が回動することを嵌合により阻止する第２の回り止め嵌合構造を構成する２つの第２の嵌合構成部について説明する。本実施の形態では、端子部材１１の外周部に、端子部材１１の径方向と直交する方向に延びる第３の被嵌合部（１１ｅ）が端子部材１１側の第２の嵌合構成部として一体に形成されている。またワッシャ１５の筒状部１５ｂの内周部に、第３の被嵌合部（１１ｅ）と嵌合する第４の嵌合部（１５ｄ）がワッシャ１５側の第２の嵌合構成部として一体に形成されている。具体的には、端子部１１ｃのタブ溶接部１１ｂに連続する基部には、ワッシャ１５の筒状部１５ｂが外接する拡径部１１ｄが一体に設けられている。そして端子部１１ｃの拡径部１１ｄに、第３の被嵌合部を構成する被接触平面１１ｅとして形成されている。この例では、第２の被嵌合部を構成する被接触平面１１ｅは、端子部材１１側の第２の嵌合構成部を構成している。そしてワッシャ１５の筒状部１５ｂの内周部には、径方向内側に突出する突出部１５ｄが第４の嵌合部（ワッシャ１５側の第２の嵌合構成部）として形成されている。突出部１５ｄの端面１５ｆが、端子部材１１の被接触平面１１ｅと接触する接触平面を構成している。このような面接触を採用すると、第３の被嵌合部（１１ｅ）及び第４の嵌合部（１５ｆ）の強度の低下を防止できる。なお本実施の形態とは逆に、端子部１１ｃの外周部に、端子部の径方向に外側に延びる第３の嵌合部（突出部）を第２の嵌合構成部として一体に形成してもよく、またワッシャ１５の筒状部１５ｂの内周部に、第３の嵌合部（突出部）と嵌合する第４の被嵌合部（例えば突出部が嵌る溝部）を一体に形成してもよい。(Second detent fitting structure)
Next, two second fitting components constituting a second detent fitting structure that prevents the terminal member 11 from rotating relative to the washer 15 by fitting will be described. In the present embodiment, the third fitted portion (11e) extending in the direction orthogonal to the radial direction of the terminal member 11 is provided on the outer peripheral portion of the terminal member 11 as the second fitting component on the terminal member 11 side. It is integrally formed. Further, a fourth fitting portion (15d) that fits with the third fitted portion (11e) is provided on the inner peripheral portion of the cylindrical portion 15b of the washer 15 as a second fitting component on the washer 15 side. It is integrally formed. Specifically, an enlarged diameter portion 11d that circumscribes the tubular portion 15b of the washer 15 is integrally provided at a base portion that is continuous with the tab weld portion 11b of the terminal portion 11c. And it forms in the enlarged diameter part 11d of the terminal part 11c as the to-be-contacted plane 11e which comprises a 3rd to-be-fitted part. In this example, the contacted flat surface 11e constituting the second fitted portion constitutes a second fitting component on the terminal member 11 side. A protruding portion 15d that protrudes radially inward is formed as a fourth fitting portion (second fitting component on the washer 15 side) on the inner peripheral portion of the cylindrical portion 15b of the washer 15. The end surface 15 f of the protruding portion 15 d constitutes a contact plane that contacts the contacted plane 11 e of the terminal member 11. Employing such surface contact can prevent the strength of the third fitted portion (11e) and the fourth fitted portion (15f) from decreasing. Contrary to the present embodiment, a third fitting portion (projecting portion) extending outward in the radial direction of the terminal portion is integrally formed as a second fitting component portion on the outer peripheral portion of the terminal portion 11c. Alternatively, a fourth fitted portion (for example, a groove portion into which the protruding portion fits) that fits with the third fitting portion (projecting portion) is integrally formed on the inner peripheral portion of the cylindrical portion 15b of the washer 15. It may be formed.

図１を参照して、本実施の形態では、ワッシャ１５及び１７の筒状部１５ｂ及び１７ｂの端子貫通孔５ａ及び７ａからタブ溶接部１１ｂ及び１３ｂ側に突出する端部部分１５ｇ及び１７ｇの外側にオーリング２３及び２５が嵌合されている。この構造では、ワッシャ１５及び１７により、オーリング２３及び２５の位置の規制を図ることができる。したがってオーリング２３及び２５の位置の規制に別部品を用いる必要性がなくなる。   Referring to FIG. 1, in the present embodiment, outside of end portions 15g and 17g projecting from terminal through holes 5a and 7a of tubular portions 15b and 17b of washers 15 and 17 toward tab welded portions 11b and 13b. O-rings 23 and 25 are fitted to each other. In this structure, the positions of the O-rings 23 and 25 can be regulated by the washers 15 and 17. Therefore, it is not necessary to use separate parts for regulating the positions of the O-rings 23 and 25.

そしてタブ溶接部１１ｂ及び１３ｂには、環状の溝部１１ｆ及び１３ｆが形成されている。環状の溝部１１ｆ及び１３ｆは、蓋部材５及び７側に向かって開口し且つ筒状部１５ｂ及び１７ｂの端部部分１５ｇ及び１７ｇ及びオーリング２３及び２５が入る環状の溝部１１ｆ及び１３ｆが形成されている。この環状の溝部１１ｆ及び１３ｆも、オーリング２３及び２５の位置を規制するので、部品点数の削減に寄与する。   And the annular groove parts 11f and 13f are formed in the tab welding parts 11b and 13b. The annular grooves 11f and 13f are opened toward the lid members 5 and 7, and annular grooves 11f and 13f into which the end portions 15g and 17g of the cylindrical portions 15b and 17b and the O-rings 23 and 25 enter are formed. ing. Since the annular grooves 11f and 13f also regulate the positions of the O-rings 23 and 25, it contributes to a reduction in the number of parts.

本実施の形態によれば、第１の回り止め嵌合構造（５ｂ，１５ｃ）により蓋部材５に対してワッシャ（１５，１７）が回動することを阻止し、第２の回り止め嵌合構造（１１ｅ，１５ｄ）によりワッシャ（１５，１７）に対して端子部材（１１，１３）が回動することを阻止することができる。その結果、部品点数を増やすことなく、端子部材（１１，１３）の回り止めを実現することができる。   According to this embodiment, the first detent fitting structure (5b, 15c) prevents the washer (15, 17) from rotating relative to the lid member 5, and the second detent fitting The structure (11e, 15d) can prevent the terminal member (11, 13) from rotating with respect to the washer (15, 17). As a result, the terminal member (11, 13) can be prevented from rotating without increasing the number of parts.

上記実施の形態では、リチウムイオン二次電池に本発明の端子構造を適用したが、二次電池の種類は本実施の形態に限定されるものではない。また本実施の形態では、電池容器本体の長手方向の両端に正極端子部材及び負極端子部材が配置されているが、一方の極性の端子部材だけを本発明の構造として、他方の極性の端子を容器本体自身とする場合にも、本発明を適用できるのは勿論である。   In the above embodiment, the terminal structure of the present invention is applied to a lithium ion secondary battery, but the type of the secondary battery is not limited to this embodiment. In the present embodiment, the positive electrode terminal member and the negative electrode terminal member are arranged at both ends in the longitudinal direction of the battery container body, but only the terminal member of one polarity is used as the structure of the present invention, and the terminal of the other polarity is used. Of course, the present invention can also be applied to the container body itself.

＜二次電池の構成＞
以下本願明細書に記載の二次電池の構成要件を列挙する。<Configuration of secondary battery>
The constituent requirements of the secondary battery described in this specification will be listed below.

（１）少なくとも一端側に開口部を有する金属製の筒状の電池容器本体、及び中心部に端子貫通孔を有して前記電池容器本体の前記開口部を塞ぐ金属製の蓋部材を備えてなる電池容器と、
タブを備えた一方の極性の電極と他方の極性の電極とが、セパレータを介して筒状の軸芯に捲回されて構成され、前記電池容器内に収納された捲回型電極群と、
前記電池容器内に注入された電解液と、
前記軸芯の軸線方向の一端側に配置され、前記軸芯の前記一端に嵌合される軸芯嵌合部と、前記タブが溶接されるタブ溶接部と、前記軸芯嵌合部が延びる方向とは反対側に延びて前記蓋部材に形成された前記端子貫通孔を貫通するネジ付きの端子部を備えた一方の極性の端子部材と、
前記端子部材の前記端子部に螺合されるナットと、
前記蓋部材と前記ナットとの間に配置されて前記蓋部材と前記ナットとの間を電気的に絶縁する環状のフランジ部と、前記端子部に嵌合され且つ前記端子貫通孔に嵌合されて、前記端子部材と前記蓋部材との間を電気的に絶縁する筒状部とを一体に備えたワッシャと、前記タブ溶接部と前記蓋部材との間で圧縮されたオーリングとを備えた二次電池であって、
前記蓋部材の前記端子貫通孔と前記ワッシャの前記筒状部には、前記ワッシャが前記蓋部材に対して前記端子部を中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成する第１の嵌合構成部がそれぞれ形成されており、
前記ワッシャの前記筒状部と前記端子部材との間には、前記ワッシャに対して端子部材が回動することを嵌合により阻止する第２の回り止め嵌合構造を構成する第２の嵌合構成部がそれぞれ形成されていることを特徴とする二次電池。(1) A metal cylindrical battery case main body having an opening at at least one end side, and a metal lid member having a terminal through hole at the center and closing the opening of the battery case main body. A battery container,
One polarity electrode with a tab and the other polarity electrode are wound around a cylindrical shaft core via a separator, and a wound electrode group housed in the battery container;
An electrolyte injected into the battery container;
An axial core fitting portion that is disposed on one end side in the axial direction of the axial core and is fitted to the one end of the axial core, a tab weld portion to which the tab is welded, and the axial core fitting portion extend. A terminal member of one polarity provided with a screwed terminal portion extending in the opposite direction to the direction and penetrating the terminal through hole formed in the lid member;
A nut screwed into the terminal portion of the terminal member;
An annular flange portion disposed between the lid member and the nut to electrically insulate between the lid member and the nut, and fitted into the terminal portion and fitted into the terminal through hole. A washer integrally including a cylindrical portion that electrically insulates between the terminal member and the lid member, and an O-ring compressed between the tab welded portion and the lid member. Secondary battery,
A first detent fit that prevents the washer from rotating about the terminal portion with respect to the lid member by fitting to the terminal through hole of the lid member and the cylindrical portion of the washer. A first fitting component that forms the combined structure is formed,
A second fitting that constitutes a second detent fitting structure that prevents the terminal member from rotating with respect to the washer by fitting between the tubular portion of the washer and the terminal member. A secondary battery in which a combined component is formed.

本発明によれば、第１の回り止め嵌合構造により蓋部材に対してワッシャが回動することを阻止し、第２の回り止め嵌合構造によりワッシャに対して端子部材が回動することを阻止する。特に、本発明では、第１の回り止め嵌合構造を蓋部材の端子貫通孔とワッシャの筒状部にそれぞれ設けた第１の嵌合構成部により形成し、第２の回り止め嵌合構造をワッシャの筒状部と端子部とにそれぞれ設けた第２の嵌合構成部により形成したので、特別に部品を準備することなく、端子部材の回り止めを実現することができる。   According to the present invention, the first detent fitting structure prevents the washer from rotating relative to the lid member, and the second detent fitting structure prevents the terminal member from rotating relative to the washer. To prevent. In particular, in the present invention, the first detent fitting structure is formed by the first fitting components provided respectively in the terminal through hole of the lid member and the cylindrical portion of the washer, and the second detent fitting structure Is formed by the second fitting components provided in the cylindrical part and the terminal part of the washer, respectively, so that the terminal member can be prevented from rotating without specially preparing parts.

１ リチウムイオン二次電池
３ 電池容器本体
５ 正極側電池蓋（蓋部材）
５ａ 端子貫通孔
５ｂ 凸部（第１の嵌合構成部）
６ ガス排出口
７ 負極側電池蓋
７ａ 端子貫通孔
７ｂ 凸部
８ 軸芯
９ 電極群
１１ 正極端子部材
１１ａ 軸芯嵌合部
１１ｂ タブ溶接部
１１ｃ 端子部
１１ｄ 拡径部
１１ｅ 被接触平面（第２の嵌合構成部）
１１ｆ 溝部
１３ａ 軸芯嵌合部
１３ｂ タブ溶接部
１３ｃ 端子部
１５，１７ ワッシャ
１５ａ フランジ部
１５ｂ 筒状部
１５ｃ 溝（第１の嵌合構成部）
１５ｄ 突出部（第２の嵌合構成部）
１５ｆ 端面
１５ｇ 端部部分
１９，２１ ナット
２３，２５ オーリング
８１ 被嵌合部
９１ 正極電極
９２ 負極電極
９３ セパレータ
９４ 未塗着部
９５ 正極タブ
９６ 未塗着部
９７ 負極タブDESCRIPTION OF SYMBOLS 1 Lithium ion secondary battery 3 Battery container main body 5 Positive electrode side battery cover (lid member)
5a Terminal through hole 5b Convex part (first fitting component)
6 Gas exhaust port 7 Negative electrode side battery cover 7a Terminal through hole 7b Protruding portion 8 Axial core 9 Electrode group 11 Positive electrode terminal member 11a Axial core fitting portion 11b Tab welded portion 11c Terminal portion 11d Expanded portion 11e Contacted plane (second Mating component)
11f Groove portion 13a Shaft core fitting portion 13b Tab weld portion 13c Terminal portion 15, 17 Washer 15a Flange portion 15b Tubular portion 15c Groove (first fitting component)
15d protrusion (second fitting component)
15f End surface 15g End portion 19, 21 Nut 23, 25 O-ring 81 Fit portion 91 Positive electrode 92 Negative electrode 93 Separator 94 Uncoated portion 95 Positive tab 96 Uncoated portion 97 Negative electrode tab

本発明は、端子構造及びワッシャに関するものである。   The present invention relates to a terminal structure and a washer.

特開２０００−７７０５３号公報（特許文献１）の図５及びＷＯ２０１２／０３９４２３号公報（特許文献２）の図７には、電池容器の蓋部材と端子部材の端子部に螺合されるナットとの間に配置されて蓋部材とナットとの間を電気的に絶縁する環状のフランジ部と、端子部に嵌合され且つ蓋部材の端子貫通孔に嵌合されて、端子部と蓋部材との間を電気的に絶縁する筒状部とを一体に備えた絶縁部材（ワッシャ）を備えたリチウムイオン電池等の非水電解液二次電池が開示されている。しかしながらこれらの公報には、絶縁部材及び端子部材の回り止めについては記載されていない。特開２０１４−７２１４５号公報（特許文献３）の図１には、蓋部材に固定されたピン部材を端子部材のタブ溶接部と係止して端子部材が回ることを防止する回り止め構造が開示されている。   FIG. 5 of Japanese Patent Laid-Open No. 2000-77053 (Patent Document 1) and FIG. 7 of WO 2012/039423 (Patent Document 2) include a nut screwed to a lid member of a battery container and a terminal portion of a terminal member. An annular flange portion that is disposed between and electrically insulating between the lid member and the nut, and fitted into the terminal portion and fitted into the terminal through hole of the lid member, the terminal portion and the lid member A non-aqueous electrolyte secondary battery such as a lithium ion battery provided with an insulating member (washer) integrally provided with a cylindrical portion that electrically insulates the battery is disclosed. However, these publications do not describe the detent of the insulating member and the terminal member. In FIG. 1 of Japanese Patent Application Laid-Open No. 2014-72145 (Patent Document 3), there is a rotation prevention structure that locks the pin member fixed to the lid member with the tab welded portion of the terminal member to prevent the terminal member from turning. It is disclosed.

特開２０００−７７０５３号公報JP 2000-77053 A ＷＯ２０１２／０３９４２３号公報WO2012 / 039423 特開２０１４−７２１４５号公報JP 2014-72145 A

特許文献１及び２に示された二次電池のように、フランジ部と筒状部とが一体化された絶縁部材（ワッシャ）を設けると部品点数を少なくすることができる。しかしながら一体化され絶縁部材を用いても、特許文献３に記載のような回り止め構造を用いると結果的に部品点数が増加することになる上、ピン部材の係止のために端子部材のタブ溶接部の形状を大きくする必要があった。   As in the secondary batteries disclosed in Patent Documents 1 and 2, if an insulating member (washer) in which the flange portion and the cylindrical portion are integrated is provided, the number of components can be reduced. However, even if an integrated insulating member is used, if the anti-rotation structure as described in Patent Document 3 is used, the number of parts increases as a result, and the tab of the terminal member is used for locking the pin member. It was necessary to enlarge the shape of the weld.

本発明の目的は、部品点数の増加、端子部材の大型化をせずに、端子部材の回り止めを実現することができる端子構造を提供することにある。   The objective of this invention is providing the terminal structure which can implement | achieve rotation prevention of a terminal member, without increasing the number of components and enlarging a terminal member.

本発明の他の目的は、端子構造に適用可能なワッシャと嵌合する部材の回転を防止できるワッシャを提供することにある。   Another object of the present invention is to provide a washer capable of preventing rotation of a member fitted to a washer applicable to a terminal structure.

本発明は、端子貫通孔を有する蓋部材と、蓋部材の端子貫通孔に嵌合される筒状部を一体に備えたワッシャと、ワッシャの筒状部に嵌合された端子部を有する端子部材と、端子部材の端子部にナットが螺合されてなる端子構造を改良の対象とする。   The present invention relates to a lid member having a terminal through-hole, a washer integrally provided with a cylindrical portion fitted into the terminal through-hole of the lid member, and a terminal having a terminal portion fitted into the cylindrical portion of the washer. A terminal structure in which a nut is screwed to a member and a terminal portion of the terminal member is an object of improvement.

本発明の端子構造では、蓋部材の端子貫通孔とワッシャの筒状部には、ワッシャが蓋部材に対して端子部材を中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成する第１の嵌合構成部がそれぞれ形成されている。またワッシャの筒状部と端子部材との間には、ワッシャに対して端子部材が回動することを嵌合により阻止する第２の回り止め嵌合構造を構成する第２の嵌合構成部がそれぞれ形成されている。本発明によれば、第１の回り止め嵌合構造により蓋部材に対してワッシャが回動することを阻止し、第２の回り止め嵌合構造によりワッシャに対して端子部材が回動することを阻止する。特に、本発明では、第１の回り止め嵌合構造を蓋部材の端子貫通孔とワッシャの筒状部にそれぞれ設けた第１の嵌合構成部により形成し、第２の回り止め嵌合構造をワッシャの筒状部と端子部材とにそれぞれ設けた第２の嵌合構成部により形成したので、特別に部品を準備することなく、端子部材の回り止めを実現することができる。   In the terminal structure of the present invention, the terminal through hole of the lid member and the cylindrical portion of the washer are fitted with a first detent fitting that prevents the washer from rotating about the terminal member with respect to the lid member by fitting. A first fitting component that constitutes the combined structure is formed. Further, a second fitting component that constitutes a second detent fitting structure that prevents the terminal member from rotating with respect to the washer by fitting between the tubular portion of the washer and the terminal member. Are formed respectively. According to the present invention, the first detent fitting structure prevents the washer from rotating relative to the lid member, and the second detent fitting structure prevents the terminal member from rotating relative to the washer. To prevent. In particular, in the present invention, the first detent fitting structure is formed by the first fitting components provided respectively in the terminal through hole of the lid member and the cylindrical portion of the washer, and the second detent fitting structure Is formed by the second fitting components provided in the cylindrical part of the washer and the terminal member, respectively, so that the terminal member can be prevented from rotating without specially preparing parts.

第１の回り止め嵌合構造の構成は任意であるが、端子貫通孔の内周部に、端子貫通孔の径方向に延びる第１の嵌合部または第１の被嵌合部が前記第１の嵌合構成部として一体に形成されており、ワッシャの筒状部の外周部に、第１の嵌合部または第１の被嵌合部と嵌合する第２の被嵌合部または第２の嵌合部が一体に形成されているのが好ましい。このような構成を採用すると、簡単に第１の回り止め嵌合構造を実現できる。   The configuration of the first detent fitting structure is arbitrary, but the first fitting portion or the first fitted portion extending in the radial direction of the terminal through hole is provided on the inner peripheral portion of the terminal through hole. A second fitted portion that is integrally formed as a first fitting component and is fitted to the outer peripheral portion of the tubular portion of the washer with the first fitted portion or the first fitted portion; It is preferable that the second fitting portion is integrally formed. If such a configuration is employed, the first detent fitting structure can be easily realized.

第２の回り止め嵌合構造の構成は任意であるが、端子部材の外周部に、端子部の径方向に延びる第３の嵌合部または第３の被嵌合部が第２の嵌合構成部として一体に形成されており、ワッシャの筒状部の内周部に、第３の嵌合部または第３の被嵌合部と嵌合する第４の被嵌合部または第４の嵌合部が一体に形成されているのが好ましい。このような構成を採用すると、簡単に第２の回り止め嵌合構造を実現できる。   The configuration of the second detent fitting structure is arbitrary, but the third fitting portion or the third fitted portion extending in the radial direction of the terminal portion is fitted to the outer peripheral portion of the terminal member. It is integrally formed as a constituent part, and a fourth fitted part or a fourth part fitted to the third fitting part or the third fitted part on the inner peripheral part of the cylindrical part of the washer. It is preferable that the fitting portion is integrally formed. By adopting such a configuration, the second detent fitting structure can be easily realized.

また蓋部材の端子貫通孔から蓋部材の裏面側に突出するワッシャの筒状部の端部部分の外側にオーリングが嵌合されているのが好ましい。この構造では、ワッシャにより、オーリングの位置の規制を図ることができる。したがってオーリングの位置の規制に別部品を用いる必要性がなくなる。 Also preferably O-ring is fitted to the outer end portion of the cylindrical portion of the washer which projects from the terminal through-hole of the lid member on the back surface side of the lid member. In this structure, the O-ring position can be regulated by the washer. Therefore, it is not necessary to use a separate part for regulating the O-ring position.

さらに蓋部材の前記裏面側に位置する端子部材の一部には、ワッシャの筒状部が外接する拡径部が一体に設けられているのが好ましい。 Furthermore a part of the terminal member located at the back surface side of the lid member, the enlarged diameter portion of the cylindrical portion of the washer is circumscribed preferably provided integrally.

この場合、端子部の拡径部に第３の被嵌合部が被接触平面として形成されており、ワッシャの筒状部の第４の嵌合部には、被接触平面と接触する接触平面を備えているのが好ましい。この構成を採用すると、第３の被嵌合部及び第４の嵌合部の強度の低下を防止できる。 In this case, the third fitted portion to the enlarged diameter portion of the terminal portion is formed as the contact plane, the fourth fitting portion of the cylindrical portion of the washer, the contact to contact with the contact plane It is preferable to have a flat surface. If this structure is employ | adopted, the fall of the intensity | strength of a 3rd to-be-fitted part and a 4th fitting part can be prevented.

また端子部材の拡径部と連続し且つ径方向外側に拡がる基部（二次電池の場合にはタブ溶接部）には、蓋部材側に向かって開口し且つワッシャの筒状部の端部部分及びオーリングが入る環状の溝部が形成されているのが好ましい。この環状の溝部も、オーリングの位置を規制するので、部品点数の削減に寄与する。   Also, the base portion (in the case of a secondary battery, a tab welded portion) that is continuous with the enlarged diameter portion of the terminal member and expands outward in the radial direction is open toward the lid member side and the end portion of the tubular portion of the washer And it is preferable that the annular groove part into which an O-ring enters is formed. This annular groove also regulates the position of the O-ring, which contributes to a reduction in the number of parts.

電池容器の両端に正極端子部材と負極端子部材が配置される二次電池に本発明が適用される場合には、正極端子部材と負極端子部材の両方に対して、上記と同じ構成を採用できるのは勿論である。
本発明のワッシャは、端子部材の端子部が貫通する貫通孔を備えた筒状部を有する。そしてワッシャには、筒状部の外周部にワッシャの回動を阻止する第１の嵌合構成部が形成されており、筒状部の内周部に端子部材の回動を阻止する第２の嵌合構成部が形成されている。 When the present invention is applied to a secondary battery in which a positive electrode terminal member and a negative electrode terminal member are disposed at both ends of the battery container, the same configuration as described above can be adopted for both the positive electrode terminal member and the negative electrode terminal member. Of course.
The washer according to the present invention has a cylindrical portion having a through hole through which the terminal portion of the terminal member passes. In the washer, a first fitting component that prevents the washer from rotating is formed on the outer peripheral portion of the cylindrical portion, and a second that prevents the terminal member from rotating on the inner peripheral portion of the cylindrical portion. The fitting component is formed.

本発明をリチウムイオン二次電池に適用した一実施の形態をその長手方向に沿って切断し且つ一部を省略して示した断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment in which the present invention is applied to a lithium ion secondary battery, cut along the longitudinal direction and partially omitted. ナットを締め付ける前の二次電池の側面図である。It is a side view of the secondary battery before tightening a nut. 本実施の形態で用いる電極群を捲回する状態を示す図である。It is a figure which shows the state which winds the electrode group used by this Embodiment. （Ａ）はワッシャの平面図、（Ｂ）はワッシャの側面図、（Ｃ）は（Ａ）のＡ−Ａ線断面図、（Ｄ）は（Ａ）のＢ−Ｂ線断面図である。(A) is a plan view of the washer, (B) is a side view of the washer, (C) is a cross-sectional view taken along line AA of (A), and (D) is a cross-sectional view taken along line BB of (A). （Ｅ）は正極端子部材の正面図、（Ｆ）は（Ｇ）のＢ−Ｂ線断面図、（Ｇ）は正極端子部材の平面図である。(E) is a front view of a positive electrode terminal member, (F) is a sectional view taken along line BB of (G), and (G) is a plan view of the positive electrode terminal member. 正極端子部材，オーリング，蓋部材，ワッシャ，ナットからなる分解斜視図である。It is a disassembled perspective view which consists of a positive electrode terminal member, an O ring, a cover member, a washer, and a nut.

以下、図面を参照して本発明の実施の形態を詳細に説明する。図１は、本発明をリチウムイオン二次電池に適用した一実施の形態をその長手方向に沿って切断し且つ一部を省略して示した断面図である。なお図１においては、リチウムイオン二次電池の構成部材の一部の図示を省略してある。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment in which the present invention is applied to a lithium ion secondary battery, cut along the longitudinal direction and partially omitted. In FIG. 1, some of the constituent members of the lithium ion secondary battery are not shown.

〈リチウムイオン二次電池の全体構成〉
本実施の形態のリチウムイオン二次電池１は、電池容器本体３と、正極側電池蓋（単に蓋部材ともいう）５と、負極側電池蓋７と、電解液に浸潤されて軸芯８に正極電極と負極電極とが捲回されてなる電極群９と、正極端子部材１１と、負極端子部材１３と、絶縁部材からなるワッシャ１５及び１７と、ナット１９及び２１と、オーリング２３及び２５を備えている。容器本体３内には、非水電解液（図示せず）が注入されている。従って、電極群９には、非水電解液が浸潤している。なお、図１においては理解を容易にするため、リチウムイオン電池の一部の寸法を誇張して示している。また図２は、後述するナットを締め付ける前の二次電池の側面図を示している。 <Overall configuration of lithium-ion secondary battery>
The lithium ion secondary battery 1 according to the present embodiment includes a battery container body 3, a positive battery lid (also simply referred to as a lid member) 5, a negative battery lid 7, and a shaft 8 infiltrated with an electrolyte solution. Electrode group 9 formed by winding the positive electrode and the negative electrode, positive electrode terminal member 11, negative electrode terminal member 13, washers 15 and 17 made of insulating members, nuts 19 and 21, and o-rings 23 and 25 It has. A non-aqueous electrolyte (not shown) is injected into the container body 3. Accordingly, the electrode group 9 is infiltrated with the non-aqueous electrolyte. In FIG. 1, some dimensions of the lithium ion battery are exaggerated for easy understanding. FIG. 2 shows a side view of the secondary battery before tightening a nut to be described later.

電池容器本体３は、ニッケルメッキが施されたスチール材料により両端が開口した円筒形状を有している。電池容器本体３の両端の開口部は、正極側電池蓋５及び負極側電池蓋７とによりそれぞれ塞がれている。正極側電池蓋５及び負極側電池蓋７は、ガス排出口６を備えており、その中央部には、端子貫通孔５ａ及び７ａがそれぞれ設けられている。ガス排出口６は、例えば特開平１１−２７３６５０号公報に示される安全弁構造と同様に、図示しない開裂形安全弁により塞がれており、開裂形安全弁は弁押え環により保持されている。安全弁は、電池容器本体内でガスが発生することにより、電池容器本体内の圧力が一定以上となると、開裂状態となって発生したガスを放出する。端子貫通孔５ａ及び７ａには、後述する正極端子部材１１の端子部１１ｃ及び負極端子部材１３の端子部１３ｃが貫通している。   The battery container body 3 has a cylindrical shape with both ends opened by a nickel-plated steel material. Openings at both ends of the battery container body 3 are respectively closed by the positive battery cover 5 and the negative battery cover 7. The positive electrode side battery cover 5 and the negative electrode side battery cover 7 are provided with a gas discharge port 6, and terminal through holes 5 a and 7 a are respectively provided in the center thereof. The gas discharge port 6 is closed by a cleaving safety valve (not shown) as in the safety valve structure disclosed in, for example, Japanese Patent Application Laid-Open No. 11-273650, and the cleaving safety valve is held by a valve retainer ring. When the pressure in the battery container body exceeds a certain level due to the generation of gas in the battery container body, the safety valve is in a cleaved state and releases the generated gas. A terminal portion 11c of the positive electrode terminal member 11 and a terminal portion 13c of the negative electrode terminal member 13, which will be described later, pass through the terminal through holes 5a and 7a.

図３は、本実施の形態で用いる電極群９を捲回する状態を示す図である。電極群９は、帯状の正極電極９１と帯状の負極電極９２とを、セパレータ９３を介して中空円筒状の軸芯８を中心として断面渦巻き状に捲回することにより構成されている。本実施の形態の正極電極９１は、正極集電板としてのアルミニウム箔の両面に、リチウム遷移金属複酸化物であるマンガン酸リチウムを含む正極活物質を略均質に塗布した構成となっている。アルミニウム箔の長手方向の一方の辺側には、正極合剤が塗装されていない未塗着部９４が形成されている。未塗着部９４は、櫛歯状に切り欠かれており、切り欠かれた残部により、正極タブ９５が形成されている。   FIG. 3 is a diagram showing a state in which the electrode group 9 used in the present embodiment is wound. The electrode group 9 is configured by winding a belt-like positive electrode 91 and a belt-like negative electrode 92 in a spiral shape with a hollow cylindrical shaft core 8 as a center through a separator 93. The positive electrode 91 of the present embodiment has a configuration in which a positive electrode active material containing lithium manganate, which is a lithium transition metal double oxide, is applied almost uniformly on both surfaces of an aluminum foil serving as a positive electrode current collector plate. On one side in the longitudinal direction of the aluminum foil, an uncoated portion 94 that is not coated with the positive electrode mixture is formed. The uncoated portion 94 is cut out in a comb-like shape, and a positive electrode tab 95 is formed by the remaining portion cut out.

負極電極９２は、負極集電板としての圧延銅箔の両面に、負極活物質としてリチウムイオンを吸蔵・放出可能な炭素粉末を含む負極合剤を略均質に塗布した構成となっている。負極活物質は、電極群を捲回したときに正極電極９１の正極活物質の全体がセパレータを介して負極活物質と対向するように、負極版に塗布されている。そのため、負極活物質の軸方向の長さは、正極活物質の軸方向よりも長く形成されている。銅箔の長手方向の一方の辺側には、負極合剤が塗装されていない未塗着部９６が形成されている。未塗着部は、櫛歯状に切り欠かれており、切り欠かれた残部により、負極タブ９７が形成されている。負極タブ９７は、正極タブ９５が形成された辺側と対向する辺側に形成される。正極側電池蓋５側に複数の正極タブ９５が位置し、負極側電池蓋７側に複数の負極タブ９７が位置している。   The negative electrode 92 has a configuration in which a negative electrode mixture containing carbon powder capable of occluding and releasing lithium ions as a negative electrode active material is applied almost uniformly on both surfaces of a rolled copper foil as a negative electrode current collector. The negative electrode active material is applied to the negative electrode plate so that the entire positive electrode active material of the positive electrode 91 faces the negative electrode active material through the separator when the electrode group is wound. Therefore, the length of the negative electrode active material in the axial direction is longer than that of the positive electrode active material. On one side in the longitudinal direction of the copper foil, an uncoated portion 96 that is not coated with the negative electrode mixture is formed. The uncoated part is cut out in a comb-like shape, and a negative electrode tab 97 is formed by the remaining part cut out. The negative electrode tab 97 is formed on the side opposite to the side on which the positive electrode tab 95 is formed. A plurality of positive electrode tabs 95 are located on the positive electrode side battery lid 5 side, and a plurality of negative electrode tabs 97 are located on the negative electrode side battery lid 7 side.

セパレータ９３は、リチウムイオンが通過可能なポリエチレン製の多孔質材により形成されている。セパレータ９３は、正極電極９１及び負極電極９２が互いに接触することを防止する。軸芯８はポリプロピレン樹脂により中空円筒状に形成されている。軸芯８の内周面の軸線方向の両端部には、軸線方向に開口する被嵌合部８１及び８２がそれぞれ設けられている。なお、正極電極９１、負極電極９２及びセパレータ９３の詳細な構成については、本発明の要旨とは関係しないので、説明を省略する。   The separator 93 is formed of a polyethylene porous material through which lithium ions can pass. The separator 93 prevents the positive electrode 91 and the negative electrode 92 from contacting each other. The shaft core 8 is formed in a hollow cylindrical shape from polypropylene resin. At both ends of the inner peripheral surface of the shaft core 8 in the axial direction, fitted portions 81 and 82 that open in the axial direction are provided. Note that the detailed configuration of the positive electrode 91, the negative electrode 92, and the separator 93 is not related to the gist of the present invention, and thus the description thereof is omitted.

（ワッシャ）
本実施形態で用いるワッシャ１５及び１７について説明する。正極側電池蓋５及び負極側電池蓋７の端子貫通孔５ａ及び７ａには、ワッシャ１５及び１７が嵌合されている。ワッシャ１５及び１７は、蓋部材５及び７とナット１９及び２１との間に配置されている。 (Washer)
The washer 15 and 17 used in this embodiment will be described. Washers 15 and 17 are fitted in the terminal through holes 5 a and 7 a of the positive battery cover 5 and the negative battery cover 7. Washers 15 and 17 are disposed between the lid members 5 and 7 and the nuts 19 and 21.

ワッシャ１５及び１７は、環状のフランジ部１５ａ及び１７ａと、筒状部１５ｂ及び１７ｂとを一体に備えている。フランジ部１５ａ及び１７ａは、蓋部材５及び７とナット１９及び２１との間を電気的に絶縁し、筒状部１５ｂ及び１７ｂは、端子部１１ｃ及び１３ｃに嵌合され且つ端子貫通孔５ａ及び７ａに嵌合されて、端子部１１ｃ及び１３ｃと蓋部材５及び７との間を電気的に絶縁する。ワッシャ１５（１７）は、電気絶縁性と耐電解液性とを有する樹脂材料又はゴム材料により成形された絶縁部材である。   Washers 15 and 17 are integrally provided with annular flange portions 15a and 17a and cylindrical portions 15b and 17b. The flange portions 15a and 17a electrically insulate between the lid members 5 and 7 and the nuts 19 and 21, and the cylindrical portions 15b and 17b are fitted to the terminal portions 11c and 13c and the terminal through holes 5a and 7a is fitted to electrically insulate between the terminal portions 11c and 13c and the lid members 5 and 7. The washer 15 (17) is an insulating member formed of a resin material or rubber material having electrical insulation properties and electrolytic solution resistance.

〈正極端子部材及び負極端子部材〉
本実施形態の正極端子部材１１及び負極端子部材１３は、軸芯嵌合部１１ａ及び１３ａと、タブが溶接されるタブ溶接部１１ｂ及び１３ｂと、ネジ付きの端子部１１ｃ及び１３ｃとを備えている。ネジ付きの端子部１１ｃ及び１３ｃは、軸芯嵌合部１１ａ及び１３ａが延びる方向とは反対側に延びて蓋部材５及び７に形成された端子貫通孔５ａ及び７ａに貫通されている。 <Positive electrode terminal member and negative electrode terminal member>
The positive electrode terminal member 11 and the negative electrode terminal member 13 of this embodiment are provided with shaft core fitting portions 11a and 13a, tab weld portions 11b and 13b to which tabs are welded, and terminal portions 11c and 13c with screws. Yes. The screwed terminal portions 11c and 13c extend through the terminal through holes 5a and 7a formed in the lid members 5 and 7 so as to extend in a direction opposite to the extending direction of the shaft core fitting portions 11a and 13a.

ナット１９及び２１は、ネジ付きの端子部１１ｃ及び１３ｃのネジ部に螺合される。また、オーリング２３及び２５は、ゴム材料によって成形されて、タブ溶接部１１ｂ及び１３ｂ（端子部材の基部）の環状の溝部１１ｆ及び溝部１３ｆと蓋部材５及び７との間で圧縮された状態で配置される。   The nuts 19 and 21 are screwed into the screw portions of the terminal portions 11c and 13c with screws. Further, the O-rings 23 and 25 are formed of a rubber material and compressed between the annular grooves 11f and 13f of the tab welded portions 11b and 13b (base portions of the terminal members) and the lid members 5 and 7. It is arranged with.

〈第１の回り止め嵌合構造及び第２の回り止め嵌合構造〉
本実施の形態では、蓋部材５及び７の端子貫通孔５ａ及び７ａとワッシャ１５及び１７の筒状部１５ｂ及び１７ｂには、ワッシャ１５及び１７が蓋部材５及び７に対して端子部１１ｃ及び１３ｃを中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成する後に説明する第１の嵌合構成部（５ｂ，１５ｃ）がそれぞれ形成されている。またワッシャ１５及び１７の筒状部１５ｂ及び１７ｂと端子部材１１及び１３との間には、ワッシャ１５及び１７に対して端子部１１ｃ及び１３ｃが回動することを嵌合により阻止する第２の回り止め嵌合構造を構成する後に説明する第２の嵌合構成部（１１ｅ，１５ｄ）がそれぞれ形成されている。 <First detent fitting structure and second detent fitting structure>
In the present embodiment, the terminal through holes 5a and 7a of the lid members 5 and 7 and the cylindrical portions 15b and 17b of the washers 15 and 17 are connected to the terminal portions 11c and First fitting components (5b, 15c) which will be described later are formed to constitute a first detent fitting structure that prevents the rotation around 13c by fitting. Further, a second portion that prevents the terminal portions 11c and 13c from rotating with respect to the washers 15 and 17 is fitted between the cylindrical portions 15b and 17b of the washers 15 and 17 and the terminal members 11 and 13. Second fitting components (11e, 15d), which will be described later after forming the detent fitting structure, are formed.

次に第１の回り止め嵌合構造を構成する２つの第１の嵌合構成部（５ｂ，１５ｃ）及び第２の回り止め嵌合構造を構成する２つの第２の嵌合構成部（１１ｅ，１５ｄ）について説明する。なお負極側の端子嵌合構造は、正極側の端子嵌合構造と同じであるため、代表して正極側の端子嵌合構造について説明する。説明のために、図４乃至図６を参照する。図４（Ａ）はワッシャ１５の平面図を示しており、図４（Ｂ）はワッシャ１５の側面図を示しており、図４（Ｃ）は図４（Ａ）のＡ−Ａ線断面図を示しており、図４（Ｄ）は図４（Ａ）のＢ−Ｂ線断面図を示している。また図５（Ｅ）は正極端子部材１１の正面図、図５（Ｆ）は図５（Ｇ）のＢ−Ｂ線断面図、図５（Ｇ）は正極端子部材１１の平面図を示している。さらに図６には、正極端子部材１１，オーリング２３，蓋部材５，ワッシャ１５，ナット１９の分解斜視図を示してある。   Next, two first fitting components (5b, 15c) constituting the first detent fitting structure and two second fitting components (11e) constituting the second detent fitting structure , 15d). Since the terminal fitting structure on the negative electrode side is the same as the terminal fitting structure on the positive electrode side, the terminal fitting structure on the positive electrode side will be described as a representative. For explanation, reference is made to FIGS. 4A shows a plan view of the washer 15, FIG. 4B shows a side view of the washer 15, and FIG. 4C is a cross-sectional view taken along line AA in FIG. 4A. FIG. 4D is a cross-sectional view taken along line BB in FIG. 5 (E) is a front view of the positive electrode terminal member 11, FIG. 5 (F) is a cross-sectional view taken along line BB of FIG. 5 (G), and FIG. 5 (G) is a plan view of the positive electrode terminal member 11. Yes. FIG. 6 is an exploded perspective view of the positive electrode terminal member 11, the O-ring 23, the lid member 5, the washer 15, and the nut 19.

〈第１の回り止め嵌合構造〉
ワッシャ１５が蓋部材５に対して端子部材１１を中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成する２つの第１の嵌合構成部について説明する。図１及び図６に示すように、蓋部材５の端子貫通孔５ａの内周部に、端子貫通孔５ａの径方向内側に延びる凸部（第１の嵌合部）５ｂが蓋部材５側の第１の嵌合構成部として一体に形成されている。そしてワッシャ１５の筒状部１５ｂの外周部には、凸部（第１の嵌合部）５ｂと嵌合する溝（第１の被嵌合部）１５ｃがワッシャ１５側の第１の嵌合構成部として形成されている。溝１５ｃは、筒状部１５ｂの径方向外側に向かう方向とフランジ部１５ａから離れる方向に向かって開口している。そして溝１５ｃの横断面形状は、凸部５ｂの輪郭形状と相似形になっている。なお凸部５ｂ及び溝１５ｃの形状は、凸部５ｂが溝１５ｃに殆ど隙間無く嵌合できるものであれば、どのような形状であってもよく、本実施の形態の形状に限定されるものではない。本実施の形態とは逆に、端子貫通孔の内周部に、端子貫通孔５ａの径方向外側に延びる第１の被嵌合部（溝）が第１の嵌合構成部として一体に形成されており、ワッシャ１５の筒状部１５ｂの外周部に、第１の被嵌合部と嵌合する第２の嵌合部（凸部）が一体に形成されていてもよいのは勿論である。 <First detent fitting structure>
Two first fitting components constituting the first detent fitting structure that prevents the washer 15 from rotating around the terminal member 11 with respect to the lid member 5 by fitting will be described. As shown in FIGS. 1 and 6, a convex portion (first fitting portion) 5 b extending radially inward of the terminal through-hole 5 a is provided on the inner side of the terminal through-hole 5 a of the lid member 5. Are integrally formed as a first fitting component. A groove (first fitted portion) 15c that fits with the convex portion (first fitting portion) 5b is provided on the outer peripheral portion of the cylindrical portion 15b of the washer 15 in the first fitting on the washer 15 side. It is formed as a component. The groove 15c is opened in a direction toward the radially outer side of the cylindrical portion 15b and in a direction away from the flange portion 15a. And the cross-sectional shape of the groove | channel 15c is similar to the outline shape of the convex part 5b. The shape of the convex portion 5b and the groove 15c may be any shape as long as the convex portion 5b can be fitted into the groove 15c with almost no gap, and is limited to the shape of the present embodiment. is not. Contrary to the present embodiment, a first fitted portion (groove) extending outward in the radial direction of the terminal through hole 5a is integrally formed as a first fitting component on the inner peripheral portion of the terminal through hole. Of course, a second fitting portion (convex portion) that fits with the first fitted portion may be integrally formed on the outer peripheral portion of the cylindrical portion 15b of the washer 15. is there.

（第２の回り止め嵌合構造）
次にワッシャ１５に対して端子部材１１が回動することを嵌合により阻止する第２の回り止め嵌合構造を構成する２つの第２の嵌合構成部について説明する。本実施の形態では、端子部材１１の外周部に、端子部材１１の径方向と直交する方向に延びる第３の被嵌合部（１１ｅ）が端子部材１１側の第２の嵌合構成部として一体に形成されている。またワッシャ１５の筒状部１５ｂの内周部に、第３の被嵌合部（１１ｅ）と嵌合する第４の嵌合部（１５ｄ）がワッシャ１５側の第２の嵌合構成部として一体に形成されている。具体的には、端子部１１ｃのタブ溶接部１１ｂに連続する基部には、ワッシャ１５の筒状部１５ｂが外接する拡径部１１ｄが一体に設けられている。そして端子部１１ｃの拡径部１１ｄに、第３の被嵌合部を構成する被接触平面１１ｅとして形成されている。この例では、第２の被嵌合部を構成する被接触平面１１ｅは、端子部材１１側の第２の嵌合構成部を構成している。そしてワッシャ１５の筒状部１５ｂの内周部には、径方向内側に突出する突出部１５ｄが第４の嵌合部（ワッシャ１５側の第２の嵌合構成部）として形成されている。突出部１５ｄの端面１５ｆが、端子部材１１の被接触平面１１ｅと接触する接触平面を構成している。このような面接触を採用すると、第３の被嵌合部（１１ｅ）及び第４の嵌合部（１５ｆ）の強度の低下を防止できる。なお本実施の形態とは逆に、端子部１１ｃの外周部に、端子部の径方向に外側に延びる第３の嵌合部（突出部）を第２の嵌合構成部として一体に形成してもよく、またワッシャ１５の筒状部１５ｂの内周部に、第３の嵌合部（突出部）と嵌合する第４の被嵌合部（例えば突出部が嵌る溝部）を一体に形成してもよい。 (Second detent fitting structure)
Next, two second fitting components constituting a second detent fitting structure that prevents the terminal member 11 from rotating relative to the washer 15 by fitting will be described. In the present embodiment, the third fitted portion (11e) extending in the direction orthogonal to the radial direction of the terminal member 11 is provided on the outer peripheral portion of the terminal member 11 as the second fitting component on the terminal member 11 side. It is integrally formed. Further, a fourth fitting portion (15d) that fits with the third fitted portion (11e) is provided on the inner peripheral portion of the cylindrical portion 15b of the washer 15 as a second fitting component on the washer 15 side. It is integrally formed. Specifically, a base portion continuous with the tab weld portion 11b of the terminal portion 11c is integrally provided with an enlarged diameter portion 11d that circumscribes the tubular portion 15b of the washer 15. And it forms in the enlarged diameter part 11d of the terminal part 11c as the to-be-contacted plane 11e which comprises a 3rd to-be-fitted part. In this example, the contacted flat surface 11e constituting the second fitted portion constitutes a second fitting component on the terminal member 11 side. A protruding portion 15d that protrudes radially inward is formed as a fourth fitting portion (second fitting component on the washer 15 side) on the inner peripheral portion of the cylindrical portion 15b of the washer 15. The end surface 15 f of the protruding portion 15 d constitutes a contact plane that contacts the contacted plane 11 e of the terminal member 11. Employing such surface contact can prevent the strength of the third fitted portion (11e) and the fourth fitted portion (15f) from decreasing. Contrary to the present embodiment, a third fitting portion (projecting portion) extending outward in the radial direction of the terminal portion is integrally formed as a second fitting component portion on the outer peripheral portion of the terminal portion 11c. Alternatively, a fourth fitted portion (for example, a groove portion into which the protruding portion fits) that fits with the third fitting portion (projecting portion) is integrally formed on the inner peripheral portion of the cylindrical portion 15b of the washer 15. It may be formed.

図１を参照して、本実施の形態では、ワッシャ１５及び１７の筒状部１５ｂ及び１７ｂの端子貫通孔５ａ及び７ａからタブ溶接部１１ｂ及び１３ｂ側に突出する端部部分１５ｇ及び１７ｇの外側にオーリング２３及び２５が嵌合されている。この構造では、ワッシャ１５及び１７により、オーリング２３及び２５の位置の規制を図ることができる。したがってオーリング２３及び２５の位置の規制に別部品を用いる必要性がなくなる。   Referring to FIG. 1, in the present embodiment, outside of end portions 15g and 17g projecting from terminal through holes 5a and 7a of tubular portions 15b and 17b of washers 15 and 17 toward tab welded portions 11b and 13b. O-rings 23 and 25 are fitted to each other. In this structure, the positions of the O-rings 23 and 25 can be regulated by the washers 15 and 17. Therefore, it is not necessary to use separate parts for regulating the positions of the O-rings 23 and 25.

そしてタブ溶接部１１ｂ及び１３ｂには、環状の溝部１１ｆ及び１３ｆが形成されている。環状の溝部１１ｆ及び１３ｆは、蓋部材５及び７側に向かって開口し且つ筒状部１５ｂ及び１７ｂの端部部分１５ｇ及び１７ｇ及びオーリング２３及び２５が入る環状の溝部１１ｆ及び１３ｆが形成されている。この環状の溝部１１ｆ及び１３ｆも、オーリング２３及び２５の位置を規制するので、部品点数の削減に寄与する。   And the annular groove parts 11f and 13f are formed in the tab welding parts 11b and 13b. The annular grooves 11f and 13f are opened toward the lid members 5 and 7, and annular grooves 11f and 13f into which the end portions 15g and 17g of the cylindrical portions 15b and 17b and the O-rings 23 and 25 enter are formed. ing. Since the annular grooves 11f and 13f also regulate the positions of the O-rings 23 and 25, it contributes to a reduction in the number of parts.

本実施の形態によれば、第１の回り止め嵌合構造（５ｂ，１５ｃ）により蓋部材５に対してワッシャ（１５，１７）が回動することを阻止し、第２の回り止め嵌合構造（１１ｅ，１５ｄ）によりワッシャ（１５，１７）に対して端子部材（１１，１３）が回動することを阻止することができる。その結果、部品点数を増やすことなく、端子部材（１１，１３）の回り止めを実現することができる。   According to this embodiment, the first detent fitting structure (5b, 15c) prevents the washer (15, 17) from rotating relative to the lid member 5, and the second detent fitting The structure (11e, 15d) can prevent the terminal member (11, 13) from rotating with respect to the washer (15, 17). As a result, the terminal member (11, 13) can be prevented from rotating without increasing the number of parts.

上記実施の形態では、リチウムイオン二次電池に本発明の端子構造を適用したが、二次電池の種類は本実施の形態に限定されるものではない。また本実施の形態では、電池容器本体の長手方向の両端に正極端子部材及び負極端子部材が配置されているが、一方の極性の端子部材だけを本発明の構造として、他方の極性の端子を容器本体自身とする場合にも、本発明を適用できるのは勿論である。   In the above embodiment, the terminal structure of the present invention is applied to a lithium ion secondary battery, but the type of the secondary battery is not limited to this embodiment. In the present embodiment, the positive electrode terminal member and the negative electrode terminal member are arranged at both ends in the longitudinal direction of the battery container body, but only the terminal member of one polarity is used as the structure of the present invention, and the terminal of the other polarity is used. Of course, the present invention can also be applied to the container body itself.

＜二次電池の構成＞
以下本願明細書に記載の二次電池の構成要件を列挙する。 <Configuration of secondary battery>
The constituent requirements of the secondary battery described in this specification will be listed below.

（１）少なくとも一端側に開口部を有する金属製の筒状の電池容器本体、及び中心部に端子貫通孔を有して前記電池容器本体の前記開口部を塞ぐ金属製の蓋部材を備えてなる電池容器と、
タブを備えた一方の極性の電極と他方の極性の電極とが、セパレータを介して筒状の軸芯に捲回されて構成され、前記電池容器内に収納された捲回型電極群と、
前記電池容器内に注入された電解液と、
前記軸芯の軸線方向の一端側に配置され、前記軸芯の前記一端に嵌合される軸芯嵌合部と、前記タブが溶接されるタブ溶接部と、前記軸芯嵌合部が延びる方向とは反対側に延びて前記蓋部材に形成された前記端子貫通孔を貫通するネジ付きの端子部を備えた一方の極性の端子部材と、
前記端子部材の前記端子部に螺合されるナットと、
前記蓋部材と前記ナットとの間に配置されて前記蓋部材と前記ナットとの間を電気的に絶縁する環状のフランジ部と、前記端子部に嵌合され且つ前記端子貫通孔に嵌合されて、前記端子部材と前記蓋部材との間を電気的に絶縁する筒状部とを一体に備えたワッシャと、前記タブ溶接部と前記蓋部材との間で圧縮されたオーリングとを備えた二次電池であって、
前記蓋部材の前記端子貫通孔と前記ワッシャの前記筒状部には、前記ワッシャが前記蓋部材に対して前記端子部を中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成する第１の嵌合構成部がそれぞれ形成されており、
前記ワッシャの前記筒状部と前記端子部材との間には、前記ワッシャに対して端子部材が回動することを嵌合により阻止する第２の回り止め嵌合構造を構成する第２の嵌合構成部がそれぞれ形成されていることを特徴とする二次電池。 (1) A metal cylindrical battery case main body having an opening at at least one end side, and a metal lid member having a terminal through hole at the center and closing the opening of the battery case main body. A battery container,
One polarity electrode with a tab and the other polarity electrode are wound around a cylindrical shaft core via a separator, and a wound electrode group housed in the battery container;
An electrolyte injected into the battery container;
An axial core fitting portion that is disposed on one end side in the axial direction of the axial core and is fitted to the one end of the axial core, a tab weld portion to which the tab is welded, and the axial core fitting portion extend. A terminal member of one polarity provided with a screwed terminal portion extending in the opposite direction to the direction and penetrating through the terminal through hole formed in the lid member;
A nut screwed into the terminal portion of the terminal member;
An annular flange portion disposed between the lid member and the nut to electrically insulate between the lid member and the nut, and fitted into the terminal portion and fitted into the terminal through hole. A washer integrally including a cylindrical portion that electrically insulates between the terminal member and the lid member, and an O-ring compressed between the tab welded portion and the lid member. Secondary battery,
A first detent fit that prevents the washer from rotating about the terminal portion with respect to the lid member by fitting to the terminal through hole of the lid member and the cylindrical portion of the washer. A first fitting component that forms the combined structure is formed,
A second fitting that constitutes a second detent fitting structure that prevents the terminal member from rotating with respect to the washer by fitting between the tubular portion of the washer and the terminal member. A secondary battery in which a combined component is formed.

本発明によれば、第１の回り止め嵌合構造により蓋部材に対してワッシャが回動することを阻止し、第２の回り止め嵌合構造によりワッシャに対して端子部材が回動することを阻止する。特に、本発明では、第１の回り止め嵌合構造を蓋部材の端子貫通孔とワッシャの筒状部にそれぞれ設けた第１の嵌合構成部により形成し、第２の回り止め嵌合構造をワッシャの筒状部と端子部とにそれぞれ設けた第２の嵌合構成部により形成したので、特別に部品を準備することなく、端子部材の回り止めを実現することができる。   According to the present invention, the first detent fitting structure prevents the washer from rotating relative to the lid member, and the second detent fitting structure prevents the terminal member from rotating relative to the washer. To prevent. In particular, in the present invention, the first detent fitting structure is formed by the first fitting components provided respectively in the terminal through hole of the lid member and the cylindrical portion of the washer, and the second detent fitting structure Is formed by the second fitting components provided in the cylindrical part and the terminal part of the washer, respectively, so that the terminal member can be prevented from rotating without specially preparing parts.

１ リチウムイオン二次電池
３ 電池容器本体
５ 正極側電池蓋（蓋部材）
５ａ 端子貫通孔
５ｂ 凸部（第１の嵌合構成部）
６ ガス排出口
７ 負極側電池蓋
７ａ 端子貫通孔
７ｂ 凸部
８ 軸芯
９ 電極群
１１ 正極端子部材
１１ａ 軸芯嵌合部
１１ｂ タブ溶接部
１１ｃ 端子部
１１ｄ 拡径部
１１ｅ 被接触平面（第２の嵌合構成部）
１１ｆ 溝部
１３ａ 軸芯嵌合部
１３ｂ タブ溶接部
１３ｃ 端子部
１５，１７ ワッシャ
１５ａ フランジ部
１５ｂ 筒状部
１５ｃ 溝（第１の嵌合構成部）
１５ｄ 突出部（第２の嵌合構成部）
１５ｆ 端面
１５ｇ 端部部分
１９，２１ ナット
２３，２５ オーリング
８１ 被嵌合部
９１ 正極電極
９２ 負極電極
９３ セパレータ
９４ 未塗着部
９５ 正極タブ
９６ 未塗着部
９７ 負極タブ DESCRIPTION OF SYMBOLS 1 Lithium ion secondary battery 3 Battery container main body 5 Positive electrode side battery cover (lid member)
5a Terminal through hole 5b Convex part (first fitting component)
6 Gas exhaust port 7 Negative electrode side battery cover 7a Terminal through hole 7b Protruding part 8 Axial core 9 Electrode group 11 Positive electrode terminal member 11a Axle core fitting part 11b Tab welded part 11c Terminal part 11d Expanded part 11e Contacted plane (second Mating component)
11f Groove portion 13a Shaft core fitting portion 13b Tab weld portion 13c Terminal portion 15, 17 Washer 15a Flange portion 15b Tubular portion 15c Groove (first fitting component)
15d protrusion (second fitting component)
15f End surface 15g End portion 19, 21 Nut 23, 25 O-ring 81 Fit portion 91 Positive electrode 92 Negative electrode 93 Separator 94 Uncoated portion 95 Positive tab 96 Uncoated portion 97 Negative electrode tab

Claims (13)

端子貫通孔を有する蓋部材と、前記蓋部材の前記端子貫通孔に嵌合される筒状部を備えたワッシャと、前記ワッシャの前記筒状部に嵌合された端子部を有する端子部材と、前記端子部材の前記端子部にナットが螺合されてなる端子構造であり、
前記蓋部材の前記端子貫通孔と前記筒状部には、前記ワッシャが前記蓋部材に対して前記端子部材を中心として回動することを阻止する第１の嵌合構成部がそれぞれ形成されており、
前記筒状部と前記端子部材との間には、前記ワッシャに対して前記端子部材が回動することを阻止する第２の嵌合構成部がそれぞれ形成されていることを特徴とする端子構造。A lid member having a terminal through-hole, a washer having a cylindrical portion fitted into the terminal through-hole of the lid member, and a terminal member having a terminal portion fitted into the cylindrical portion of the washer; A terminal structure in which a nut is screwed onto the terminal portion of the terminal member,
A first fitting component that prevents the washer from rotating about the terminal member with respect to the lid member is formed in the terminal through hole and the cylindrical portion of the lid member, respectively. And
A terminal structure in which a second fitting component that prevents the terminal member from rotating with respect to the washer is formed between the tubular portion and the terminal member. . 前記ワッシャは、前記筒状部を一体に備えた絶縁部材から構成され、
前記蓋部材の前記端子貫通孔と前記筒状部にそれぞれ設けられた前記第１の嵌合構成部は、前記ワッシャが前記蓋部材に対して前記端子部材を中心として回動することを嵌合により阻止する第１の回り止め嵌合構造を構成し、
前記筒状部と前記端子部材にそれぞれ設けられた前記第２の嵌合構成部は、前記ワッシャに対して前記端子部材が回動することを阻止する第２の回り止め嵌合構造を構成することを特徴とする請求項１に記載の端子構造。The washer is composed of an insulating member integrally provided with the tubular portion,
The first fitting components provided in the terminal through-hole and the cylindrical part of the lid member, respectively, are fitted when the washer rotates about the terminal member with respect to the lid member. Constituting a first detent fitting structure to prevent by
The second fitting component provided on each of the cylindrical part and the terminal member constitutes a second detent fitting structure that prevents the terminal member from rotating with respect to the washer. The terminal structure according to claim 1. 前記端子貫通孔の内周部には、前記端子貫通孔の径方向に延びる第１の嵌合部または第１の被嵌合部が前記第１の嵌合構成部として形成されており、
前記ワッシャの前記筒状部の外周部には、前記第１の嵌合部または第１の被嵌合部と嵌合する第２の被嵌合部または第２の嵌合部が形成されている請求項１に記載の端子構造。A first fitting part or a first fitted part extending in a radial direction of the terminal through hole is formed as an inner part of the terminal through hole as the first fitting component.
A second fitted portion or a second fitting portion that is fitted to the first fitting portion or the first fitted portion is formed on the outer peripheral portion of the cylindrical portion of the washer. The terminal structure according to claim 1. 前記端子部材の外周部には、前記端子部材の径方向と直交する方向に延びる第３の嵌合部または第３の被嵌合部が前記第２の嵌合構成部として形成されており、
前記ワッシャの前記筒状部の内周部には、前記第３の嵌合部または第３の被嵌合部と嵌合する第４の被嵌合部または第４の嵌合部が形成されている請求項１または３に記載の端子構造。A third fitting portion or a third fitted portion extending in a direction perpendicular to the radial direction of the terminal member is formed on the outer peripheral portion of the terminal member as the second fitting component.
A fourth fitted portion or a fourth fitted portion that is fitted to the third fitted portion or the third fitted portion is formed on the inner peripheral portion of the tubular portion of the washer. The terminal structure according to claim 1 or 3. 前記蓋部材の前記端子貫通孔から前記蓋部材の裏側に突出する前記ワッシャの前記筒状部の端部部分の外側に前記オーリングが嵌合されている請求項１に記載の端子構造。   2. The terminal structure according to claim 1, wherein the O-ring is fitted to an outer side of an end portion of the tubular portion of the washer that protrudes from the terminal through hole of the lid member to a back side of the lid member. 前記蓋部材の前記裏面側に位置する前記端子部材の一部には、前記筒状部が外接する拡径部が一体に設けられている請求項５に記載の端子構造。   The terminal structure according to claim 5, wherein a part of the terminal member located on the back side of the lid member is integrally provided with an enlarged diameter portion that circumscribes the cylindrical portion. 前記拡径部に前記第３の被嵌合部が被接触平面として形成されており、
前記筒状部の前記第４の嵌合部には、前記被接触平面と接触する接触平面が形成されている請求項５に記載の端子構造。The third fitted portion is formed as a contacted flat surface in the enlarged diameter portion,
The terminal structure according to claim 5, wherein a contact plane that contacts the contacted plane is formed in the fourth fitting portion of the cylindrical portion. 前記端子部材の前記拡径部と連続し且つ前記径方向外側に拡がる基部には、前記蓋部材側に向かって開口し且つ前記筒状部の前記端部部分及び前記オーリングが入る環状の溝部が形成されている請求項５に記載の端子構造。   An annular groove portion that opens toward the lid member side and that includes the end portion of the tubular portion and the O-ring at a base portion that is continuous with the enlarged diameter portion of the terminal member and extends outward in the radial direction. The terminal structure according to claim 5, wherein 少なくとも一端側に開口部を有する金属製の筒状の電池容器本体、及び中心部に端子貫通孔を有して前記電池容器本体の前記開口部を塞ぐ金属製の蓋部材を備えてなる電池容器と、
前記端子部材の前記端子部に螺合されるナットと、
前記蓋部材と前記ナットとの間に配置されて前記蓋部材と前記ナットとの間を電気的に絶縁する環状のフランジ部と、前記端子部に嵌合され且つ前記端子貫通孔に嵌合されて、前記端子部材と前記蓋部材との間を電気的に絶縁する筒状部とを一体に備えた絶縁部材からなるワッシャと、前記端子部材の一部と前記蓋部材との間で圧縮されたオーリングとを備えた二次電池に、請求項１乃至請求項８いずれか１項に記載の端子構造を備える二次電池。A battery container comprising a metal cylindrical battery container main body having an opening at least on one end side, and a metal lid member having a terminal through hole at the center and closing the opening of the battery container main body When,
A nut screwed into the terminal portion of the terminal member;
An annular flange portion disposed between the lid member and the nut to electrically insulate between the lid member and the nut, and fitted into the terminal portion and fitted into the terminal through hole. And a washer made of an insulating member integrally provided with a cylindrical portion that electrically insulates between the terminal member and the lid member, and compressed between a part of the terminal member and the lid member. A secondary battery comprising the terminal structure according to any one of claims 1 to 8 in a secondary battery comprising an O-ring. 端子部材の端子部が貫通する貫通孔を備えた筒状部を有するワッシャであって、
前記筒状部の外周部に前記ワッシャの回動を阻止する第１の嵌合構成部が形成され、
前記筒状部の内周部に前記端子部材の回動を阻止する第２の嵌合構成部が形成されているワッシャ。A washer having a cylindrical portion with a through-hole through which a terminal portion of a terminal member passes,
A first fitting component that prevents rotation of the washer is formed on the outer periphery of the cylindrical portion,
A washer in which a second fitting component for preventing rotation of the terminal member is formed on an inner peripheral portion of the cylindrical portion. 前記第１の嵌合構成部は記筒状部の外周部の一部に設けられた凹部又は凸部であり、前記第２の嵌合構成部は前記筒状部の前記内周部に突出する突出部である請求項１０に記載のワッシャ。   The first fitting component is a recess or a protrusion provided in a part of the outer peripheral portion of the cylindrical portion, and the second fitting component protrudes from the inner peripheral portion of the cylindrical portion. The washer according to claim 10, wherein the washer is a protruding portion. 前記筒状部の一端にフランジ部を有する請求項１０に記載のワッシャ。 The washer according to claim 10, which has a flange portion at one end of the cylindrical portion. 前記突出部は一体に形成され、前記端子部材と接触する端面を有する請求項１１に記載のワッシャ。 The washer according to claim 11, wherein the protruding portion is integrally formed and has an end surface that contacts the terminal member.
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