JP5881023B2

JP5881023B2 - battery

Info

Publication number: JP5881023B2
Application number: JP2014186456A
Authority: JP
Inventors: 佐々木　丈; 丈佐々木; 和秀戸塚; 戸塚　　和秀; 勝彦岡本; 雅和 ▲堤▼
Original assignee: GS Yuasa International Ltd
Current assignee: GS Yuasa International Ltd
Priority date: 2014-09-12
Filing date: 2014-09-12
Publication date: 2016-03-09
Anticipated expiration: 2028-10-16
Also published as: JP2015038874A

Description

本発明は、発電要素を収納した電池容器の上端開口部を塞ぐ蓋板に端子を設けた電池に関するものである。 The present invention relates to a battery in which a terminal is provided on a lid plate that closes an upper end opening of a battery container that houses a power generation element.

図７に従来の大型の非水電解質二次電池の端子の取り付け構造を示す（例えば、特許文献１の第６図〜第８図参照。）。この非水電解質二次電池は、電池容器１内に長円筒形の巻回型の発電要素２を収納し、電池容器１の上端開口部を蓋板３で塞いで密閉したものである。発電要素２には、左右の端部に電極の金属箔２ａ、２ａが巻回された巻き束状のままはみ出していて、これらの金属箔２ａ、２ａには集電接続体５、５が接続されている。また、蓋板３には、左右の端部に外部端子４、４が取り付けられている。 FIG. 7 shows a terminal mounting structure of a conventional large nonaqueous electrolyte secondary battery (see, for example, FIGS. 6 to 8 of Patent Document 1). This non-aqueous electrolyte secondary battery is a battery container 1 in which a long cylindrical wound power generation element 2 is housed, and the upper end opening of the battery container 1 is closed with a cover plate 3 and sealed. The power generation element 2 protrudes in the form of a bundle of metal foils 2a and 2a wound around the left and right ends, and current collector connectors 5 and 5 are connected to these metal foils 2a and 2a. Has been. In addition, external terminals 4 and 4 are attached to the left and right ends of the lid plate 3.

外部端子４は、高さの低い円柱状の台座部４ａの上面からボルト部４ｂが上方に突設されると共に、この台座部４ａの下面からかしめ筒４ｃが下方に突設されたものである。そして、正極側と負極側の外部端子４、４のかしめ筒４ｃ、４ｃは、蓋板３の左右端部の上面に配置された外部絶縁封止材６、６の貫通孔と、蓋板３の左右端部の端子引出貫通孔３ａ、３ａと、蓋板３の左右端部の下面に配置された内部絶縁封止材７、７の貫通孔を通して、この蓋板３の上方から電池容器１内に嵌入すると共に、集電接続体５、５の上部の水平に折り曲がった接続部５ａ、５ａに形成された貫通孔にも通して下方からかしめられる。従って、外部端子４は、かしめ筒４ｃがかしめによって集電接続体５に接続され、発電要素２の電極の金属箔２ａにも接続されると共に、絶縁封止材６、７を介して蓋板３を挟持するので、この蓋板３に絶縁封止された状態で固着されることになる。 The external terminal 4 has a bolt portion 4b projecting upward from an upper surface of a columnar pedestal portion 4a having a low height, and a caulking tube 4c projecting downward from a lower surface of the pedestal portion 4a. . The caulking cylinders 4 c and 4 c of the external terminals 4 and 4 on the positive electrode side and the negative electrode side are provided with through holes of the external insulating sealing materials 6 and 6 disposed on the upper surfaces of the left and right ends of the cover plate 3, and the cover plate 3. The battery container 1 from above the cover plate 3 through the terminal lead-out through holes 3a, 3a at the left and right ends of the cover plate and the through holes of the internal insulating sealing materials 7, 7 disposed on the lower surfaces of the left and right ends of the cover plate 3. In addition to being fitted in, it is also caulked from below through the through holes formed in the horizontally bent connection portions 5a, 5a of the upper portions of the current collector connection bodies 5, 5. Therefore, the external terminal 4 is connected to the current collector connection body 5 by caulking cylinder 4c by caulking, and is also connected to the metal foil 2a of the electrode of the power generating element 2, and the lid plate via the insulating sealing materials 6 and 7 3 is sandwiched, it is fixed to the lid plate 3 in an insulated and sealed state.

ところが、このような外部端子４の取り付け構造では、非水電解質二次電池を外部機器と接続するためにリード線の圧着端子等を外部端子４のボルト部４ｂに嵌めてナット等で締め付けた場合、特にこのようなナット等の着脱を繰り返した場合に、締め付けトルクがかしめ筒４ｃのかしめ部に直接加わり、集電接続体５の接続部５ａとのかしめが緩んで外部端子４だけが空転するおそれがある。そして、外部端子４が空転すると、集電接続体５との接触電気抵抗が大きくなって電池性能が低下するだけでなく、絶縁封止材６、７との間にも隙間が生じて電池容器１内の密閉が不完全になるという問題が生じる。 However, in such an external terminal 4 mounting structure, when a non-aqueous electrolyte secondary battery is connected to an external device, a lead wire crimp terminal or the like is fitted to the bolt portion 4b of the external terminal 4 and tightened with a nut or the like. In particular, when such attachment and detachment of a nut or the like is repeated, the tightening torque is directly applied to the caulking portion of the caulking cylinder 4c, the caulking with the connection portion 5a of the current collector connection body 5 is loosened, and only the external terminal 4 is idled. There is a fear. When the external terminal 4 idles, not only does the contact electrical resistance with the current collector connector 5 increase and the battery performance deteriorates, but also a gap is formed between the insulating sealing materials 6 and 7 and the battery container. There arises a problem that the sealing inside 1 is incomplete.

しかも、非水電解質二次電池の場合、正極側の外部端子４にアルミニウム合金が用いられることが多いので、ボルト部４ｂをナット等で強く締め付けたり、このようなナット等の着脱を繰り返すと、このボルト部４ｂのねじ山が破損するという問題もあった。 Moreover, in the case of a non-aqueous electrolyte secondary battery, since an aluminum alloy is often used for the external terminal 4 on the positive electrode side, if the bolt portion 4b is strongly tightened with a nut or the like, and such attachment and detachment of such a nut is repeated, There was also a problem that the screw thread of this bolt part 4b was damaged.

そこで、従来は、外部端子４の台座部４ａを横断面が四角形や六角形等の多角柱状とし、外部絶縁封止材６にも同様の形状の外部端子凹部を設け、この外部絶縁封止材６の外部端子凹部に台座部４ａを嵌合させて外部端子４の回り止めを行わせようという提案もあった（例えば、特許文献１の第１図〜第５図参照。）。 Therefore, conventionally, the pedestal portion 4a of the external terminal 4 has a polygonal columnar shape such as a square or hexagonal cross section, and the external insulating sealing material 6 is also provided with an external terminal recess having the same shape. There has also been a proposal to prevent the external terminal 4 from rotating by fitting the pedestal 4a into the external terminal recess 6 (see, for example, FIGS. 1 to 5 of Patent Document 1).

しかしながら、このような外部端子４の取り付け構造でも、台座部４ａと外部絶縁封止材６の外部端子凹部との嵌合の若干の隙間によって外部端子４が僅かな角度だけ空転するおそれがあり、かしめ筒４ｃと集電接続体５の接続部５ａとのかしめが緩むのを完全に防ぐことはできないという問題がある。しかも、ボルト部４ｂをナット等で締め付けたときの締め付けトルクは、外部絶縁封止材６にも直接加わることになり、この外部絶縁封止材６に大きなストレスがかかって気密性が損なわれるおそれがあるという問題も生じる。 However, even with such an external terminal 4 mounting structure, there is a possibility that the external terminal 4 may idle by a slight angle due to a slight gap between the pedestal 4a and the external terminal recess of the external insulating sealing material 6. There is a problem that the caulking between the caulking cylinder 4c and the connecting portion 5a of the current collector connector 5 cannot be completely prevented. Moreover, the tightening torque when the bolt portion 4b is tightened with a nut or the like is also directly applied to the external insulating sealing material 6, and the external insulating sealing material 6 may be subjected to a great stress and airtightness may be impaired. There is also a problem that there is.

このため、従来は図８に示すような外部端子４の取り付け構造も提案されていた（例えば、特許文献２参照。）。この場合の外部端子４は、台座部４ａが六角柱状に形成されると共に、この台座部４ａの上面からはボルト部４ｂが突設されるが、下面にはかしめ筒が突設されない。また、外部絶縁封止材６の上面にも同様の六角形の外部端子凹部６ａを設け、この外部端子凹部６ａに台座部４ａを嵌合させて外部端子４の回り止めを行わせようにしている。 For this reason, the attachment structure of the external terminal 4 as shown in FIG. 8 has been conventionally proposed (see, for example, Patent Document 2). In the external terminal 4 in this case, the pedestal portion 4a is formed in a hexagonal column shape, and the bolt portion 4b protrudes from the upper surface of the pedestal portion 4a, but the caulking tube does not protrude from the lower surface. Further, a similar hexagonal external terminal recess 6a is also provided on the upper surface of the external insulating sealing material 6, and the pedestal 4a is fitted into the external terminal recess 6a to prevent the external terminal 4 from rotating. Yes.

上記外部絶縁封止材６の上面には、補助端子凹部６ｂも設けられ、この補助端子凹部６ｂには、補助端子８の台座部８ａが嵌合するようになっている。補助端子８は、台座部８ａの下面から第１かしめ筒８ｂが下方に突設されると共に、この台座部８ａの上面から第２かしめ筒８ｃが上方に突設されたものである。そして、正極側と負極側の補助端子８、８の第１かしめ筒８ｂ、８ｂは、外部絶縁封止材６、６の補助端子凹部６ｂ、６ｂの底面に形成された貫通孔と、蓋板３の左右端部の端子引出貫通孔３ａ、３ａと、内部絶縁封止材７、７の貫通孔を通して、この蓋板３の上方から電池容器１内に嵌入すると共に、集電接続体５、５の接続部５ａ、５ａに形成された貫通孔にも通して下方からかしめられる。従って、補助端子８は、第１かしめ筒８ｂと集電接続体５の接続部５ａとのかしめによる接続部を介して発電要素２の金属箔２ａに接続されると共に、絶縁封止材６、７を介して蓋板３を挟持するので、この蓋板３に対して絶縁封止された状態で固着されることになる。 An auxiliary terminal recess 6b is also provided on the upper surface of the external insulating sealing material 6, and a pedestal portion 8a of the auxiliary terminal 8 is fitted into the auxiliary terminal recess 6b. The auxiliary terminal 8 has a first caulking tube 8b projecting downward from the lower surface of the pedestal portion 8a and a second caulking tube 8c projecting upward from the upper surface of the pedestal portion 8a. The first caulking cylinders 8b and 8b of the auxiliary terminals 8 and 8 on the positive electrode side and the negative electrode side have through holes formed on the bottom surfaces of the auxiliary terminal recesses 6b and 6b of the external insulating sealing materials 6 and 6, and a cover plate 3 is inserted into the battery case 1 from above the cover plate 3 through the terminal lead-out through holes 3a and 3a at the left and right end portions of the cover 3 and the through holes of the internal insulating sealing materials 7 and 7, and the current collecting connector 5, 5 is also caulked from below through the through holes formed in the connecting portions 5a and 5a. Accordingly, the auxiliary terminal 8 is connected to the metal foil 2a of the power generating element 2 through a connection portion by caulking between the first caulking tube 8b and the connection portion 5a of the current collector connection body 5, and the insulating sealing material 6, Since the lid plate 3 is sandwiched via 7, the lid plate 3 is fixed to the lid plate 3 while being insulated and sealed.

また、上記補助端子８の第２かしめ筒８ｃと外部端子４のボルト部４ｂには、接続導体９が取り付けられる。接続導体９は、ほぼ長方形状の板材であり、一端部にはかしめ孔９ａが形成されると共に、他端部には端子貫通孔９ｂが形成されている。そして、この接続導体９は、端子貫通孔９ｂに外部端子４のボルト部４ｂが下方から挿入されると共に、かしめ孔９ａに補助端子８の第２かしめ筒８ｃが下方から挿入されて上方からかしめられる。従って、外部端子４は、外部機器との接続のためにボルト部４ｂをナット等で締め付けると、接続導体９を介して補助端子８に接続固定され、これによって発電要素２の電極の金属箔２ａにも接続されることになる。 A connection conductor 9 is attached to the second caulking cylinder 8 c of the auxiliary terminal 8 and the bolt part 4 b of the external terminal 4. The connection conductor 9 is a substantially rectangular plate material. A caulking hole 9a is formed at one end, and a terminal through hole 9b is formed at the other end. The connecting conductor 9 has a bolt portion 4b of the external terminal 4 inserted into the terminal through hole 9b from below, and a second caulking tube 8c of the auxiliary terminal 8 inserted into the caulking hole 9a from below so as to be caulked from above. It is done. Therefore, the external terminal 4 is connected and fixed to the auxiliary terminal 8 via the connection conductor 9 when the bolt portion 4b is tightened with a nut or the like for connection with an external device, and thereby the metal foil 2a of the electrode of the power generation element 2 is fixed. Will also be connected to.

このような外部端子４の取り付け構造を用いれば、ボルト部４ｂをナット等で締め付けても、締め付けトルクは補助端子８には直接加わらないので、集電接続体５の接続部５ａとのかしめが緩むようなおそれはなくなる。しかも、非水電解質二次電池の場合であっても、正極側の補助端子８だけにアルミニウム合金を用い、外部端子４には鉄や鋼等の強度の高い金属材を用いることができるので、ナット等の締め付けによってボルト部４ｂのねじ山が破損するようなこともなくなる。 If such an external terminal 4 mounting structure is used, the tightening torque is not directly applied to the auxiliary terminal 8 even if the bolt portion 4b is tightened with a nut or the like. There is no risk of loosening. Moreover, even in the case of a non-aqueous electrolyte secondary battery, an aluminum alloy can be used only for the auxiliary terminal 8 on the positive electrode side, and a high-strength metal material such as iron or steel can be used for the external terminal 4. The screw thread of the bolt part 4b is not damaged by tightening the nut or the like.

なお、外部端子の台座部に凸部を設け、この凸部を樹脂製の蓋板部の凹穴に挿入して外部端子の回り止めを行う発明も従来から提案されている（例えば、特許文献３参照。）。しかしながら、この場合は、外部端子の台座部は電池容器の内側にあり、凹穴も蓋板部の内側の下面に形成されているので、この外部端子の取り付けと凸部の凹穴への挿入を電池容器の内側で行う必要があり、電池の組み立てが困難であるという問題があった。 In addition, an invention in which a convex portion is provided on the pedestal portion of the external terminal and the convex portion is inserted into a concave hole of the resin lid plate portion to prevent the external terminal from rotating has been proposed (for example, Patent Documents). 3). However, in this case, since the pedestal portion of the external terminal is inside the battery case and the concave hole is also formed on the lower surface inside the lid plate portion, the external terminal is attached and the convex portion is inserted into the concave hole. There is a problem that it is difficult to assemble the battery.

特開２００１−３５７８３３号公報JP 2001-357833 A 特開２００３−３４６７７４号公報（第２頁、第３図）JP 2003-346774 A (2nd page, FIG. 3) 特開平１０−１２５２９１号公報JP-A-10-125291

ところが、発明者らがさらに検討を重ねたところ、上述したような外部端子４の取り付け構造であっても、ボルト部４ｂをナット等で締め付けると、締め付けトルクは外部絶縁封止材６の外部端子凹部６ａに直接加わるので、補助端子８の第１かしめ筒８ｂをかしめることにより蓋板３との間の封止を行う外部絶縁封止材６に大きなストレスがかかって高いレベルでの気密性が損なわれるのを確実に避けることができないという問題があることを見いだした。即ち、外部絶縁封止材６は、蓋板３の上面に強く圧迫される他に、ねじれ方向の大きな力を受けるので、素材の僅かな変形によって蓋板３との界面に微小な隙間を生じて密閉が不完全になるおそれが生じるのである。また、この外部絶縁封止材６が蓋板３に対して回り止めがなされていても、この回り止めとの間の若干の隙間によって外部絶縁封止材６自体が僅かに位置ずれするおそれがあり、これによって蓋板３との界面に微小な隙間を生じて密閉が不完全になるおそれが生じるのである。 However, as a result of further investigations by the inventors, even when the external terminal 4 is attached as described above, when the bolt portion 4b is tightened with a nut or the like, the tightening torque is external terminal of the external insulating sealing material 6. Since it is directly applied to the recess 6a, a large level of stress is applied to the external insulating sealing material 6 that seals between the cover plate 3 by caulking the first caulking cylinder 8b of the auxiliary terminal 8, and airtightness at a high level. I have found that there is a problem that it cannot be surely avoided that it is damaged. That is, the external insulating sealing material 6 is strongly pressed against the upper surface of the lid plate 3 and receives a large force in the twisting direction, so that a slight gap in the material causes a minute gap at the interface with the lid plate 3. As a result, the sealing may be incomplete. Further, even if the external insulating sealing material 6 is prevented from rotating with respect to the cover plate 3, the external insulating sealing material 6 itself may be slightly displaced due to a slight gap between the external insulating sealing material 6 and the cover plate 3. There is a possibility that a minute gap is formed at the interface with the cover plate 3 and the sealing is incomplete.

本発明は、蓋板に突設した回り止め部によって外部端子の回り止めを行うことにより、この外部端子の締め付けトルクが気密性や導電性を損なうようなおそれのない電池を提供しようとするものである。 The present invention intends to provide a battery in which the tightening torque of the external terminal does not impair the airtightness and conductivity by preventing the external terminal from being rotated by the rotation preventing portion protruding from the cover plate. It is.

本発明に係る電池は、
発電要素を収納し且つ開口部を有する電池容器と、
前記電池容器の開口部を塞ぐ蓋板と、
台座部と該台座部から延びるボルト部とを有する外部端子と、
前記台座部と嵌合した状態で前記蓋板の上面に配置される樹脂部材と、を備え、
前記蓋板は、複数の凸部を有し、
前記複数の凸部は、互いに略平行な突条であり、
前記樹脂部材は、前記蓋板における複数の凸部が嵌り込む凹部と該凹部の反対側に前記複数の凸部と同様の形状の部位とを有すると共に、該凹部が前記蓋板における複数の凸部が設けられた部位と凹凸嵌合し且つ前記複数の凸部と同様の形状の部位が前記台座部と前記嵌合することを特徴とする。 The battery according to the present invention is
A battery container that houses a power generation element and has an opening;
A lid plate for closing the opening of the battery case;
An external terminal having a pedestal portion and a bolt portion extending from the pedestal portion ;
A resin member disposed on the upper surface of the lid plate in a state of being fitted to the pedestal portion ,
The lid plate has a plurality of convex portions,
The plurality of convex portions are ridges substantially parallel to each other,
The resin member has a concave portion into which a plurality of convex portions in the lid plate are fitted, and a portion having the same shape as the plurality of convex portions on the opposite side of the concave portion, and the concave portion has a plurality of convex portions in the lid plate. A portion having a concave and convex portion and a portion having the same shape as the plurality of convex portions are fitted to the pedestal portion .

また、本発明に係る電池は、The battery according to the present invention is
発電要素を収納し且つ開口部を有する電池容器と、A battery container that houses a power generation element and has an opening;
前記電池容器の開口部を塞ぐ蓋板と、A lid plate for closing the opening of the battery case;
台座部と該台座部から延びるボルト部とを有する外部端子と、An external terminal having a pedestal portion and a bolt portion extending from the pedestal portion;
前記台座部と嵌合した状態で前記蓋板の上面に配置される樹脂部材と、を備え、A resin member disposed on the upper surface of the lid plate in a state of being fitted to the pedestal portion,
前記蓋板は、前記ボルト部の軸方向視において四角状の周面を有する凸部を有し、The lid plate has a convex part having a square peripheral surface in the axial direction view of the bolt part,
前記樹脂部材は、前記蓋板における凸部が嵌り込む凹部と該凹部の反対側に前記凸部と同様の形状の部位とを有すると共に、該凹部が前記蓋板における凸部が設けられた部位と凹凸嵌合し且つ前記凸部と同様の形状の部位が前記台座部と前記嵌合することを特徴とする。The resin member has a concave portion into which the convex portion of the lid plate is fitted and a portion having the same shape as the convex portion on the opposite side of the concave portion, and the concave portion is provided with the convex portion of the lid plate. And a portion having the same shape as the convex portion is fitted to the pedestal portion.

前記電池では、
前記蓋板において、前記凸部と他の部位とは、一体であってもよい。 In the battery,
In the lid plate, the convex portion and the other portion may be integrated.

前記電池では、
前記樹脂部材は、少なくとも、前記外部端子と、前記蓋板における複数の凸部が設けられた部位と、の間に配置されてもよい。 In the battery,
The resin member may be disposed at least between the external terminal and a portion provided with a plurality of convex portions in the lid plate.

本発明によれば、外部端子に締め付けトルクが加わっても、この外部端子の回転を制限することができる。 According to the present invention, even if a tightening torque is applied to the external terminal, the rotation of the external terminal can be limited.

本発明の一実施形態を示すものであって、非水電解質二次電池の構造を示す分解斜視図である。1 is an exploded perspective view showing a structure of a nonaqueous electrolyte secondary battery according to an embodiment of the present invention. 本発明の一実施形態を示すものであって、非水電解質二次電池の外部端子の取り付け構造を示す部分拡大縦断面正面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially enlarged longitudinal sectional front view showing an embodiment of the present invention and showing an external terminal mounting structure of a nonaqueous electrolyte secondary battery. 本発明の他の実施形態を示すものであって、回り止め部を額縁状とした場合の一部省略分解斜視図である。FIG. 10 is a partially omitted exploded perspective view showing another embodiment of the present invention, in the case where the detent portion has a frame shape. 本発明の他の実施形態を示すものであって、回り止め部を４本の小円筒状とした場合の一部省略分解斜視図である。FIG. 10 is a partially omitted exploded perspective view showing another embodiment of the present invention, in the case where the rotation preventing portion has a shape of four small cylinders. 本発明の他の実施形態を示すものであって、外部端子の台座部と回り止め部を畝状にした場合の一部省略分解斜視図である。FIG. 10 is a partially omitted exploded perspective view illustrating another embodiment of the present invention, in which a base portion and a rotation stopper portion of an external terminal are formed in a bowl shape. 本発明の他の実施形態を示すものであって、非水電解質二次電池の構造を示す分解斜視図である。FIG. 6 is an exploded perspective view showing another embodiment of the present invention and showing the structure of a nonaqueous electrolyte secondary battery. 従来例を示すものであって、非水電解質二次電池の構造を示す分解斜視図である。It is a disassembled perspective view which shows a prior art example and shows the structure of a nonaqueous electrolyte secondary battery. 他の従来例を示すものであって、非水電解質二次電池の構造を示す分解斜視図である。It is a disassembled perspective view which shows another prior art example and shows the structure of a nonaqueous electrolyte secondary battery.

以下、本発明の最良の実施形態について図１〜図６を参照して説明する。なお、これらの図においても、図７〜図８に示した従来例と同様の機能を有する構成部材には同じ番号を付記する。 Hereinafter, the best embodiment of the present invention will be described with reference to FIGS. In these drawings, the same reference numerals are given to constituent members having the same functions as those of the conventional example shown in FIGS.

本実施形態は、図７〜図８に示した従来例と同様に、大型の非水電解質二次電池について説明する。この非水電解質二次電池は、図１及び図２に示すように、電池容器１内に長円筒形の巻回型の発電要素２を収納し、電池容器１の上端開口部を蓋板３で塞いで密閉したものである。 In the present embodiment, a large non-aqueous electrolyte secondary battery will be described in the same manner as the conventional examples shown in FIGS. As shown in FIGS. 1 and 2, this non-aqueous electrolyte secondary battery includes a battery container 1 that houses a long cylindrical wound power generation element 2, and the upper end opening of the battery container 1 is covered with a cover plate 3. It is closed and sealed.

発電要素２は、帯状の電極である正極と負極をセパレータを介し左右の異なる方向にずらして、左右方向の回転軸を中心に上下に長円となる長円筒形に巻回したものである。正極は、アルミニウム箔の表面に正極活物質を担持させたものであり、負極は、銅箔の表面に負極活物質を担持させたものであるが、それぞれ左右のずらす方向の端縁部を活物質の未塗工部とすることによりアルミニウム箔や銅箔が露出するようになっている。従って、発電要素２の左右の端部には、これら電極の金属箔２ａ、２ａが巻回された巻き束状のままはみ出している。 The power generation element 2 is formed by shifting a positive electrode and a negative electrode, which are band-shaped electrodes, in different directions on the left and right sides through a separator, and winding them into a long cylindrical shape that forms an ellipse vertically around a rotation axis in the left-right direction. The positive electrode has a positive electrode active material supported on the surface of an aluminum foil, and the negative electrode has a negative electrode active material supported on the surface of a copper foil. An aluminum foil or a copper foil is exposed by setting the uncoated portion of the substance. Accordingly, the left and right ends of the power generation element 2 protrude as a wound bundle in which the metal foils 2a and 2a of these electrodes are wound.

上記発電要素２の左右の端部にはみ出した金属箔２ａ、２ａには、それぞれ集電接続体５、５が接続されている。集電接続体５は、正極側ではアルミニウム又はアルミニウム合金からなり、負極側では銅又は銅合金からなる上下に長い導電金属板であり、上部は水平に折り曲げられると共に貫通孔が形成されて接続部５ａとなり、この接続部５ａより下方の部分は前後に二股に分けられて下方に突出している。そして、この集電接続体５の下方の二股に分けられた部分が発電要素２の金属箔２ａと共に挟持板に挟まれて超音波溶接等により接続固定される。 Current collector connectors 5 and 5 are connected to the metal foils 2a and 2a protruding from the left and right ends of the power generating element 2, respectively. The current collector connection body 5 is made of aluminum or an aluminum alloy on the positive electrode side, and is a vertically long conductive metal plate made of copper or a copper alloy on the negative electrode side. The upper part is bent horizontally and a through hole is formed in the connection part. 5a, and the portion below the connecting portion 5a is divided into two parts in the front and rear and protrudes downward. And the part divided into the fork lower part of this current collection connection body 5 is pinched | interposed into a clamping plate with the metal foil 2a of the electric power generation element 2, and is connected and fixed by ultrasonic welding etc.

電池容器１と蓋板３は、アルミニウム合金や鋼等からなり、電池容器１は左右方向に長い方形の金属容器であり、蓋板３は、左右に細長い方形の金属板である。そして、この蓋板３は、後に電池容器１の上端開口部に嵌め込まれてレーザ溶接等により内部を密閉することになる。 The battery container 1 and the cover plate 3 are made of aluminum alloy, steel, or the like. The battery container 1 is a rectangular metal container that is long in the left-right direction, and the cover plate 3 is a rectangular metal plate that is elongated in the left-right direction. And this cover plate 3 is inserted in the upper end opening part of the battery container 1 later, and the inside is sealed by laser welding or the like.

上記蓋板３には、左右の端部に端子引出貫通孔３ａ、３ａ（左側の端子引出貫通孔３ａは部品の陰になって見えない）が開口されると共に、これら端子引出貫通孔３ａ、３ａの左右の外側に回り止め部３ｂ、３ｂ（左側の回り止め部３ｂは部品の陰になって見えない）が形成されている。回り止め部３ｂは、蓋板３の金属板をプレス加工によって上方に四角形状に突出させた凸部である。 The lid plate 3 is provided with terminal lead through holes 3a and 3a (the left terminal lead through hole 3a is not visible behind the parts) at the left and right ends, and these terminal lead through holes 3a, Anti-rotation portions 3b and 3b (the left anti-rotation portion 3b cannot be seen behind the parts) are formed on the left and right outer sides of 3a. The rotation prevention part 3b is a convex part which made the metal plate of the cover plate 3 protrude upward in the shape of a rectangle by press working.

上記蓋板３の端子引出貫通孔３ａ、３ａには、外部絶縁封止材６、６と内部絶縁封止材７、７を介して補助端子８、８が取り付けられる。補助端子８は、正極側ではアルミニウム又はアルミニウム合金からなり、負極側では銅又は銅合金からなる導電金属部品である。この補助端子８は、高さが低い八角柱状の台座部８ａの下面から第１かしめ筒８ｂが下方に突設されると共に、この台座部８ａの上面から第２かしめ筒８ｃが上方に突設されている。 Auxiliary terminals 8, 8 are attached to the terminal lead-through holes 3 a, 3 a of the cover plate 3 via external insulating sealing materials 6, 6 and internal insulating sealing materials 7, 7. The auxiliary terminal 8 is a conductive metal part made of aluminum or an aluminum alloy on the positive electrode side and made of copper or a copper alloy on the negative electrode side. The auxiliary terminal 8 has a first caulking tube 8b protruding downward from the lower surface of the octagonal columnar pedestal portion 8a having a low height, and a second caulking tube 8c protruding upward from the upper surface of the pedestal portion 8a. Has been.

外部絶縁封止材６と内部絶縁封止材７は、絶縁性と封止性を備えた合成樹脂からなる。外部絶縁封止材６は、補助端子８の台座部８ａよりは一回り大きい八角柱体からなり、上面にこの台座部８ａが嵌合する形状の補助端子凹部６ｂが設けられている。また、この外部絶縁封止材６には、補助端子凹部６ｂの底面に貫通孔が形成されると共に、この貫通孔の下面開口部はスリーブ状に下方に突出している（図２参照）。内部絶縁封止材７は、貫通孔が形成された板材である。 The outer insulating sealing material 6 and the inner insulating sealing material 7 are made of a synthetic resin having insulating properties and sealing properties. The external insulating sealing material 6 is formed of an octagonal column body that is slightly larger than the pedestal portion 8a of the auxiliary terminal 8, and an auxiliary terminal recess 6b having a shape in which the pedestal portion 8a is fitted is provided on the upper surface. The external insulating sealing material 6 has a through hole formed in the bottom surface of the auxiliary terminal recess 6b, and the lower surface opening of the through hole protrudes downward in a sleeve shape (see FIG. 2). The internal insulating sealing material 7 is a plate material in which through holes are formed.

上記外部絶縁封止材６は、蓋板３の上面に配置され、スリーブ状に突出した部分が端子引出貫通孔３ａに嵌入される。また、内部絶縁封止材７は、蓋板３の下面に配置され、端子引出貫通孔３ａから下方に突出する外部絶縁封止材６のスリーブ状に突出した部分が貫通孔に嵌入される。そして、補助端子８は、台座部８ａを外部絶縁封止材６の補助端子凹部６ｂに嵌め込むと共に、第１かしめ筒８ｂをこの補助端子凹部６ｂの底面の貫通孔と蓋板３の端子引出貫通孔３ａと内部絶縁封止材７の貫通孔とを介して、集電接続体５の接続部５ａの貫通孔に通し、この接続部５ａの貫通孔から下方に突出する部分を下方からかしめることにより蓋板３に取り付けられる。従って、この補助端子８は、第１かしめ筒８ｂと集電接続体５の接続部５ａとのかしめによる接続部を介して発電要素２の金属箔２ａに接続されると共に、絶縁封止材６、７を介して蓋板３を挟持するので、この蓋板３に対して絶縁封止された状態で固着されることになる。 The external insulating sealing material 6 is disposed on the upper surface of the cover plate 3, and a portion protruding in a sleeve shape is fitted into the terminal lead-through hole 3a. Further, the inner insulating sealing material 7 is disposed on the lower surface of the cover plate 3, and a portion of the outer insulating sealing material 6 protruding downward from the terminal lead-through hole 3a is fitted into the through hole. The auxiliary terminal 8 fits the pedestal portion 8 a into the auxiliary terminal recess 6 b of the external insulating sealing material 6, and the first caulking tube 8 b extends from the through hole in the bottom surface of the auxiliary terminal recess 6 b and the terminal lead of the cover plate 3. Through the through-hole 3a and the through-hole of the internal insulating sealing material 7, it passes through the through-hole of the connecting portion 5a of the current collector connector 5, and the portion protruding downward from the through-hole of this connecting portion 5a is viewed from below. It is attached to the cover plate 3 by crimping. Therefore, the auxiliary terminal 8 is connected to the metal foil 2a of the power generating element 2 through a connection portion by caulking between the first caulking tube 8b and the connection portion 5a of the current collector connection body 5, and the insulating sealing material 6 , 7, the cover plate 3 is clamped, so that the cover plate 3 is fixed to the cover plate 3 while being insulated and sealed.

上記蓋板３の回り止め部３ｂの上には、端子絶縁材１０を介して外部端子４が配置される。外部端子４は、非水電解質二次電池を外部機器と接続するためのものであり、鉄やステンレス鋼、クロムモリブデン鋼等の鋼、その他の強度の高い導電金属材からなる。この外部端子４は、高さの低い四角柱ではあるが、蓋板３の回り止め部３ｂの凸部の形状よりは一回り大きい台座部４ａの上面からボルト部４ｂを上方に突設したものである。また、この台座部４ａの下面には上方に向けて、回り止め部３ｂの凸部と同様の形状で少し大きい回り止め凹部４ｄが設けられている。端子絶縁材１０は、ポリフェニレンサルファイド（ＰＰＳ）等の合成樹脂の薄板を高さの低い四角形の帽子状に成形したものであり、上面の四角形の凸部は外部端子４の回り止め凹部４ｄに嵌合し、下面の四角形の凹部には蓋板３の回り止め部３ｂが嵌合するような大きさになっている。そして、外部端子４は、蓋板３の回り止め部３ｂに下面の凹部を嵌合させた端子絶縁材１０の上面の凸部に台座部４ａの回り止め凹部４ｄを被せるようにして、回り止め部３ｂの上に載置される。従って、外部端子４は、台座部４ａの回り止め凹部４ｄに端子絶縁材１０を介して回り止め部３ｂが嵌合し、この台座部４ａの下面は、端子絶縁材１０の帽子状の縁部の上に乗るので、蓋板３に対しては絶縁される。また、端子絶縁材１０に帽子状の縁部がなかったとしても、外部端子４の台座部４ａの回り止め凹部４ｄに端子絶縁材１０を介して回り止め部３ｂを嵌合させたときに、この台座部４ａの下面が蓋板３の上面よりも上方に浮いた状態となるようにしても、外部端子４を蓋板３に対して絶縁することができる。 An external terminal 4 is disposed on the anti-rotation portion 3 b of the lid plate 3 via a terminal insulating material 10. The external terminal 4 is for connecting the nonaqueous electrolyte secondary battery to an external device, and is made of steel such as iron, stainless steel, chrome molybdenum steel, or other highly conductive metal material. The external terminal 4 is a rectangular column having a low height, but has a bolt part 4b protruding upward from the upper surface of the base part 4a which is slightly larger than the shape of the convex part of the rotation preventing part 3b of the cover plate 3. It is. Further, on the lower surface of the pedestal portion 4a, a slightly larger anti-rotation recess 4d having a shape similar to that of the protrusion of the anti-rotation portion 3b is provided upward. The terminal insulating material 10 is made of a synthetic resin thin plate such as polyphenylene sulfide (PPS) formed into a square cap shape having a low height, and the quadrangular convex portion on the upper surface is fitted into the rotation preventing concave portion 4 d of the external terminal 4. In addition, the size is such that the rotation preventing portion 3b of the cover plate 3 is fitted into the rectangular recess on the lower surface. Then, the external terminal 4 is prevented from rotating by covering the convex portion on the upper surface of the terminal insulating material 10 in which the concave portion on the lower surface is fitted to the anti-rotating portion 3b of the cover plate 3 with the convex portion 4d of the base portion 4a. It is mounted on the part 3b. Therefore, the external terminal 4 is fitted with the anti-rotation portion 3b via the terminal insulating material 10 in the anti-rotation recess 4d of the pedestal portion 4a, and the lower surface of the pedestal portion 4a is a hat-shaped edge of the terminal insulating material 10. Is insulated from the lid plate 3. Further, even if the terminal insulating material 10 does not have a hat-shaped edge, when the anti-rotation portion 3b is fitted to the anti-rotation recess 4d of the base portion 4a of the external terminal 4 via the terminal insulating material 10, The external terminal 4 can be insulated from the lid plate 3 even if the lower surface of the pedestal portion 4 a is in a state of floating above the upper surface of the lid plate 3.

上記補助端子８の第２かしめ筒８ｃと外部端子４のボルト部４ｂには、接続導体９が取り付けられる。接続導体９は、銅合金等の導電金属材からなるほぼ長方形状の板材であり、表面には防錆等の他、滑りを良くするためにニッケルメッキが施されている。この接続導体９は、一端部にかしめ孔９ａが形成されると共に、他端部に端子貫通孔９ｂが形成されている。そして、この接続導体９は、端子貫通孔９ｂに外部端子４のボルト部４ｂが下方から挿入されると共に、かしめ孔９ａに補助端子８の第２かしめ筒８ｃが下方から挿入されて上方からかしめられる。従って、接続導体９は、補助端子８には接続固定されるが、外部端子４はボルト部４ｂが端子貫通孔９ｂに嵌入しているだけとなる。なお、平板状の接続導体９を補助端子８にかしめによって確実に固定するためには、補助端子８の台座部８ａの上面と、蓋板３の回り止め部３ｂの上に端子絶縁材１０を介して載置した外部端子４の台座部４ａの上面は、面一か外部端子４の台座部４ａの上面の方が僅かに低いことが好ましい。もっとも、外部端子４が持ち上がり台座部４ａの上面が接続導体９の下面に当接した際に、回り止め凹部４ｄと端子絶縁材１０と回り止め部３ｂとの嵌合が外れるようでは、この回り止め部３ｂが外部端子４の回り止めを行うことができないので、台座部４ａの上面は低すぎてはいけない。 A connection conductor 9 is attached to the second caulking cylinder 8 c of the auxiliary terminal 8 and the bolt part 4 b of the external terminal 4. The connection conductor 9 is a substantially rectangular plate material made of a conductive metal material such as a copper alloy, and the surface thereof is nickel-plated to improve sliding in addition to rust prevention. The connecting conductor 9 has a caulking hole 9a at one end and a terminal through hole 9b at the other end. The connecting conductor 9 has a bolt portion 4b of the external terminal 4 inserted into the terminal through hole 9b from below, and a second caulking tube 8c of the auxiliary terminal 8 inserted into the caulking hole 9a from below so as to be caulked from above. It is done. Accordingly, the connection conductor 9 is connected and fixed to the auxiliary terminal 8, but the external terminal 4 has only the bolt portion 4 b fitted into the terminal through hole 9 b. In order to securely fix the flat connection conductor 9 to the auxiliary terminal 8 by caulking, the terminal insulating material 10 is provided on the upper surface of the base portion 8a of the auxiliary terminal 8 and on the anti-rotation portion 3b of the cover plate 3. It is preferable that the upper surface of the pedestal portion 4a of the external terminal 4 placed thereon is flush or slightly lower than the upper surface of the pedestal portion 4a of the external terminal 4. However, when the external terminal 4 is lifted and the upper surface of the pedestal portion 4a is in contact with the lower surface of the connecting conductor 9, the rotation preventing recess 4d, the terminal insulating material 10, and the rotation preventing portion 3b are not fitted. Since the stopper 3b cannot prevent the external terminal 4 from rotating, the upper surface of the base 4a should not be too low.

上記構成の非水電解質二次電池の外部端子４は、例えば図示しない外部機器のリード線の圧着端子をボルト部４ｂに嵌めてナットを螺着する。すると、外部端子４は、通常は僅かに持ち上がって、台座部４ａの上面を接続導体９の下面に押し付け、ナットとの間でリード線の圧着端子と共にこの接続導体９を挟持圧迫するので、これら圧着端子と外部端子４と接続導体９とが接続される。従って、リード線の圧着端子は、接続導体９と補助端子８と集電接続体５とを介して発電要素２の電極（金属箔２ａ）に接続され、これによって外部機器が非水電解質二次電池と接続される。 For example, the external terminal 4 of the non-aqueous electrolyte secondary battery having the above-described configuration is formed by fitting a crimp terminal of a lead wire of an external device (not shown) into the bolt portion 4b and screwing a nut. Then, the external terminal 4 is usually lifted slightly and presses the upper surface of the pedestal portion 4a against the lower surface of the connection conductor 9 and presses the connection conductor 9 with the crimp terminal of the lead wire between the nut and the nut. The crimp terminal, the external terminal 4 and the connection conductor 9 are connected. Therefore, the crimp terminal of the lead wire is connected to the electrode (metal foil 2a) of the power generation element 2 through the connection conductor 9, the auxiliary terminal 8, and the current collector connection body 5, whereby the external device is connected to the nonaqueous electrolyte secondary. Connected with battery.

しかも、ナットをボルト部４ｂに締め付ける際に回転しようとする外部端子４は、回り止め凹部４ｄに端子絶縁材１０を介して嵌合した蓋板３の回り止め部３ｂによって確実に回り止めされる。なお、この際、回り止め部３ｂと端子絶縁材１０と回り止め凹部４ｄとの嵌合による多少の隙間によって外部端子４がある程度の角度だけ空転したとしても、接続や封止に支障が生じるおそれは全くない。 In addition, the external terminal 4 to be rotated when the nut is tightened to the bolt portion 4b is reliably prevented from rotating by the rotation preventing portion 3b of the cover plate 3 fitted to the rotation preventing recess 4d via the terminal insulating material 10. . At this time, even if the external terminal 4 is idled by a certain angle due to a slight gap due to the fitting of the anti-rotation portion 3b, the terminal insulating material 10 and the anti-rotation recess 4d, there is a problem in connection and sealing. It is not at all.

また、このときボルト部４ｂに加わった締め付けトルクは、外部端子４とは分離された補助端子８にトルクとして伝わることはないので、この補助端子８が空転して集電接続体５の接続部５ａとのかしめが緩み接続が損なわれたり、絶縁封止材６、７と蓋板３との間の封止が損なわれるようなおそれも生じない。なお、ナットによる締め付けトルクは、ボルト部４ｂの軸線を中心として接続導体９を回転させるような力も生じるが、このような力は補助端子８にとっては第２かしめ筒８ｃを前後方向に押す方向の力となるので、これによって接続や封止が損なわれる心配はない。特に、本実施形態では、接続導体９の表面に滑りを良くするためのニッケルメッキが施されているので、ナットによる締め付けが行われても、接続導体９を回転させるような力がほとんど生じない。 Further, at this time, the tightening torque applied to the bolt portion 4 b is not transmitted as torque to the auxiliary terminal 8 separated from the external terminal 4, so that the auxiliary terminal 8 idles and the connecting portion of the current collector connector 5 is connected. There is no possibility that the caulking with 5a is loosened and the connection is lost, or the sealing between the insulating sealing materials 6 and 7 and the cover plate 3 is damaged. The tightening torque by the nut also causes a force that rotates the connection conductor 9 about the axis of the bolt portion 4b. However, such a force is in the direction of pushing the second caulking cylinder 8c in the front-rear direction for the auxiliary terminal 8. There is no worry that this will damage the connection and sealing. In particular, in this embodiment, since the surface of the connection conductor 9 is nickel-plated to improve slippage, even if tightening with a nut is performed, a force that rotates the connection conductor 9 hardly occurs. .

また、蓋板３の回り止め部３ｂを嵌合させた端子絶縁材１０は、ナットによる締め付けの際に、外部端子４の回り止めを行うので、大きな締め付けトルクを受けることになる。しかし、端子絶縁材１０は、蓋板３上で外部絶縁封止材６とは分離されているので、補助端子８の封止を行う外部絶縁封止材６に締め付けトルクが加わることはなく、このため外部絶縁封止材６による封止が損なわれるおそれも生じない。 Further, since the terminal insulating material 10 fitted with the anti-rotation portion 3b of the cover plate 3 prevents the external terminal 4 from rotating when tightening with a nut, it receives a large tightening torque. However, since the terminal insulating material 10 is separated from the external insulating sealing material 6 on the cover plate 3, no tightening torque is applied to the external insulating sealing material 6 for sealing the auxiliary terminal 8, For this reason, there is no possibility that the sealing by the external insulating sealing material 6 is impaired.

また、ナットによる締め付けトルクは、鉄や鋼等の強度の高い導電金属材からなる外部端子４にのみ加わり、強度が弱いアルミニウム又はアルミニウム合金からなる正極側の補助端子８や強度が比較的弱い銅又は銅合金からなる負極側の補助端子８には加わらないので、ナットを強く締め付けたり、このようなナットの着脱を繰り返しても、ボルト部４ｂのねじ山が破損するようなおそれがなくなる。 Further, the tightening torque by the nut is applied only to the external terminal 4 made of a conductive metal material having high strength such as iron or steel, and the auxiliary terminal 8 on the positive electrode side made of weak aluminum or aluminum alloy or relatively weak copper. Or, since it is not applied to the auxiliary terminal 8 on the negative electrode side made of a copper alloy, there is no possibility that the screw thread of the bolt portion 4b is damaged even if the nut is strongly tightened or the nut is repeatedly attached and detached.

さらに、蓋板３の回り止め部３ｂは、蓋板３の金属板をプレス加工によって凸状に突出させたものなので、この蓋板３を製造する際のプレス加工時に端子引出貫通孔３ａ等と共に容易に一体的に形成することができ、本実施形態の場合には、図１に示す蓋板３の左右の中央部の安全弁３ｄのための開口部の形成なども同時に一体成形が可能となる。しかも、図７や図８に示した従来例の場合には、外部絶縁封止材６を回り止めするために蓋板３の縁にちょうど嵌まり込むような形状にしなければならないので、電池サイズが異なり蓋板３の大きさも相違する電池ごとに形状の異なる外部絶縁封止材６を用意する必要があったが、本実施形態の場合には、回り止め部３ｂの形状や大きさが共通であれば、蓋板３の大きさが相違する電池であっても、同じ外部端子４と端子絶縁材１０と接続導体９と補助端子８と外部絶縁封止材６とを共用することができ、端子構造を共通化させることができる。 Furthermore, since the rotation prevention part 3b of the cover plate 3 is a metal plate of the cover plate 3 that protrudes in a convex shape by press processing, it is used together with the terminal lead-through holes 3a and the like at the time of press processing when manufacturing the cover plate 3. In the case of this embodiment, the opening for the safety valve 3d at the center of the left and right sides of the lid plate 3 shown in FIG. 1 can be integrally formed at the same time. . In addition, in the case of the conventional example shown in FIGS. 7 and 8, since the outer insulating sealing material 6 must be shaped so as to be fitted into the edge of the lid plate 3 in order to prevent rotation, the battery size However, in the present embodiment, the shape and size of the anti-rotation portion 3b are common in the present embodiment. If so, the same external terminal 4, terminal insulating material 10, connecting conductor 9, auxiliary terminal 8, and external insulating sealing material 6 can be shared even if the batteries of the cover plate 3 have different sizes. The terminal structure can be made common.

なお、上記実施形態では、蓋板３の金属板をプレス加工によって上方に突出させて凸部とすることにより回り止め部３ｂを形成する場合を示したが、底面に凹部が形成された外部端子４の台座部４ａを蓋板３上に当接させた状態で、この蓋板３の下方から凸状の金型でプレスすることにより、蓋板３の金属板を台座部４ａの凹部に嵌合する形状に上方に突出させて凸部とすることにより回り止め部３ｂを形成することもできる。蓋板３の金属板を単にプレス加工する場合には、蓋板の上面に凹状の金型を配置しておき、下方から凸状の金型でプレスすることになるが、台座部４ａの凹部を用いれば、この凹状の金型を用いる必要がなくなるので、金型作製の費用と手間を軽減できる。しかも、台座部４ａの凹部に現物合わせによって凸部を成形するので、回り止め部３ｂが台座部４ａの凹部にぴったりと嵌合することになり、プレス加工の加工精度を必要以上に高めなくても、外部端子４の回り止めを確実に行うことができるようになる。さらに、このような回り止め部３ｂの形成方法は、台座部４ａと回り止め部３ｂとの間に端子絶縁材１０や端子絶縁層を介在させた場合にも実施することができる。 In the above embodiment, the case where the rotation stopper 3b is formed by projecting the metal plate of the cover plate 3 upward by pressing to form a protrusion is shown. However, the external terminal having a recess formed on the bottom surface 4 with the pedestal portion 4a in contact with the lid plate 3, the metal plate of the lid plate 3 is fitted into the concave portion of the pedestal portion 4a by pressing from below the lid plate 3 with a convex mold. The anti-rotation part 3b can also be formed by projecting upward into the shape to be combined into a convex part. When the metal plate of the lid plate 3 is simply pressed, a concave mold is placed on the upper surface of the lid plate and pressed with a convex mold from below, but the concave portion of the pedestal portion 4a Since it is not necessary to use this concave mold, it is possible to reduce the cost and labor of mold production. In addition, since the convex portion is formed by matching the actual portion with the concave portion of the pedestal portion 4a, the rotation preventing portion 3b fits exactly into the concave portion of the pedestal portion 4a, and the processing accuracy of the press work is not increased more than necessary. However, the rotation of the external terminal 4 can be reliably performed. Further, such a method of forming the rotation preventing portion 3b can be carried out even when the terminal insulating material 10 or the terminal insulating layer is interposed between the base portion 4a and the rotation preventing portion 3b.

また、上記実施形態では、蓋板３の金属板を四角形状に突出させた回り止め部３ｂを端子絶縁材１０を介して台座部４ａの回り止め凹部４ｄに嵌合させることにより外部端子４の回り止めを行う場合を示したが、この蓋板３の金属板の上面を部分的に凸状若しくは凹状、又は、凸状と凹状を組み合わせた凹凸状とした回り止め部３ｂに端子絶縁材１０を介して台座部４ａが係止することによりボルト部４ｂの軸線を中心とした外部端子４の回転を制限することができるものであれば、これら台座部４ａと回り止め部３ｂの形状は任意である。そして、端子絶縁材１０も、これら台座部４ａと回り止め部３ｂが係止する部分に合わせた形状にすればよい。 Moreover, in the said embodiment, by fitting the rotation prevention part 3b which made the metal plate of the cover plate 3 protrude in the shape of a rectangle to the rotation prevention recessed part 4d of the base part 4a via the terminal insulating material 10, the external terminal 4 of FIG. Although the case where the rotation prevention is performed is shown, the terminal insulating material 10 is provided on the rotation prevention portion 3b in which the upper surface of the metal plate of the cover plate 3 is partially convex or concave, or the concave / convex shape combining the convex and concave shapes. As long as the rotation of the external terminal 4 around the axis of the bolt part 4b can be restricted by locking the pedestal part 4a via the pedestal part 4a, the shape of the pedestal part 4a and the rotation preventing part 3b is arbitrary. It is. And the terminal insulating material 10 should just be made into the shape match | combined with the part which these base parts 4a and the rotation prevention part 3b latch.

例えば、図３には、外部端子４の台座部４ａを四角柱状とし、回り止め部３ｂをこの台座部４ａの周囲を囲む額縁状の凸部とした場合を示す。この場合も、台座部４ａが額縁状の回り止め部３ｂで囲まれた回り止め凹部３ｃに端子絶縁材１０を介して嵌まり込むことにより、外部端子４の回り止めを行うことができる。図１や図３に示すように回り止め部３ｂと台座部４ａが柱体を凹部に嵌合させて回り止めを行う場合には、この柱体や凹部の横断面形状がボルト部４ｂの軸線を中心とした回転体ではない形状であれば、どのような形状であってもよく、四角柱状以外の任意の多角柱状を用いてもよい。 For example, FIG. 3 shows a case where the pedestal portion 4a of the external terminal 4 has a quadrangular prism shape, and the detent portion 3b has a frame-like convex portion surrounding the pedestal portion 4a. Also in this case, the external terminal 4 can be prevented from being rotated by fitting the pedestal part 4a into the rotation preventing recess 3c surrounded by the frame-shaped rotation preventing part 3b via the terminal insulating material 10. As shown in FIG. 1 and FIG. 3, when the anti-rotation portion 3 b and the pedestal portion 4 a prevent the rotation by fitting the column into the recess, the cross-sectional shape of the column or recess is the axis of the bolt portion 4 b. As long as it is a shape that is not a rotating body centering on, any shape may be used, and any polygonal column shape other than a square columnar shape may be used.

また、例えば図４には、外部端子４の台座部４ａを四角柱状とし、蓋板３の金属板を上方に突出させた４本の小円筒状の凸部を回り止め部３ｂとした場合を示す。この場合の回り止め部３ｂの４本の凸部は、図３に示した額縁状の回り止め部３ｂにおける四隅付近の位置に形成されることになる。この場合も、回り止め部３ｂにおける前後に２本ずつ並んだ凸部の左右の間に台座部４ａが端子絶縁材１０を介して嵌まり込んで回転が制限されるので、外部端子４の回り止めを行うことができる。さらに、例えば図５には、台座部４ａの下面に畝状の凹凸を形成すると共に、蓋板３の金属板を畝状に突出させた複数本の凸部を回り止め部３ｂとした場合を示す。この場合も、台座部４ａの畝状の凹凸と回り止め部３ｂの畝状の凸部が波板状の端子絶縁材１０を介して互いに噛み合って外部端子４の回り止めを行うことができる。 For example, FIG. 4 shows a case where the pedestal portion 4a of the external terminal 4 has a quadrangular prism shape, and the four small cylindrical convex portions projecting upward from the metal plate of the cover plate 3 serve as the rotation preventing portion 3b. Show. In this case, the four convex portions of the rotation stopper 3b are formed at positions near the four corners of the frame-shaped rotation stopper 3b shown in FIG. Also in this case, since the pedestal portion 4a is fitted between the left and right convex portions arranged in front and rear in the rotation preventing portion 3b via the terminal insulating material 10 and the rotation is restricted, Stop can be done. Further, for example, FIG. 5 shows a case where a bowl-shaped unevenness is formed on the lower surface of the pedestal part 4a and a plurality of convex parts obtained by projecting the metal plate of the lid plate 3 in a bowl shape are used as the rotation preventing part 3b. Show. Also in this case, the flange-like unevenness of the pedestal part 4a and the hook-like convex part of the anti-rotation part 3b can be engaged with each other via the corrugated terminal insulating material 10 to prevent the external terminal 4 from rotating.

また、上記図３では、回り止め部３ｂを額縁状の凸部とし、この回り止め部３ｂで囲まれた内側に回り止め凹部３ｃを形成する場合を示したが、蓋板３の金属板の上面を凹状に窪ませた回り止め部３ｂを形成することもできる。この場合の外部端子４の台座部４ａや端子絶縁材１０は、図３に示したものと同様の形状でもよいし、回り止め部３ｂの凹部の形状に応じて適宜変更することもできる。さらに、上記図５では、蓋板３の金属板を畝状に突出させた回り止め部３ｂを示したが、例えばこの金属板に波板状の凹凸を形成して回り止め部３ｂとすることもできる。そして、この場合も、外部端子４の台座部４ａや端子絶縁材１０は、図５に示したものと同様の形状でもよいし、回り止め部３ｂの凹凸の形状に応じて適宜変更することもできる。 In FIG. 3, the case where the rotation stopper 3 b is a frame-shaped protrusion and the rotation stopper 3 c is formed on the inner side surrounded by the rotation stopper 3 b is shown. An anti-rotation portion 3b whose upper surface is recessed in a concave shape can also be formed. In this case, the pedestal portion 4a of the external terminal 4 and the terminal insulating material 10 may have the same shape as that shown in FIG. 3, or may be appropriately changed according to the shape of the concave portion of the rotation preventing portion 3b. Further, in FIG. 5, the rotation preventing portion 3 b in which the metal plate of the lid plate 3 is protruded in a bowl shape is shown. For example, a corrugated plate-like unevenness is formed on the metal plate to form the rotation preventing portion 3 b. You can also. Also in this case, the pedestal 4a and the terminal insulating material 10 of the external terminal 4 may have the same shape as that shown in FIG. 5, or may be appropriately changed according to the uneven shape of the rotation stopper 3b. it can.

また、上記実施形態では、合成樹脂の薄板を台座部４ａと回り止め部３ｂが係止する部分に合わせた形状に成形した端子絶縁材１０を用いる場合を示したが、この端子絶縁材１０は、合成樹脂を射出成形によって所定形状に成形したものであってもよく、合成樹脂に代えて絶縁性を有しある程度以上の強度を有するものであれば、例えばセラミックス等の任意の材料を用いることができる。さらに、この端子絶縁材１０は、台座部４ａと回り止め部３ｂが係止する部分の形状に沿って変形するフレキシブルな合成樹脂シート等からなるものであってもよい。 Moreover, in the said embodiment, although the case where the terminal insulating material 10 shape | molded in the shape which match | combined the thin plate of a synthetic resin with the part which the base part 4a and the rotation prevention part 3b latch was shown, this terminal insulating material 10 is shown. In addition, synthetic resin may be molded into a predetermined shape by injection molding, and any material such as ceramics may be used as long as it has insulation and a certain level of strength instead of synthetic resin. Can do. Further, the terminal insulating material 10 may be made of a flexible synthetic resin sheet or the like that deforms along the shape of the portion where the pedestal portion 4a and the rotation preventing portion 3b are locked.

さらに、上記端子絶縁材１０は、外部端子４の台座部４ａを係止すると共に、蓋板３の回り止め部３ｂに係止されるようになっていてもよい。即ち、例えば端子絶縁材１０が、合成樹脂製のブロックからなり、上面に台座部４ａを係止する凸部や凹部等を備えると共に、下面に回り止め部３ｂに係止されるような凸部や凹部等を備えたものとすることもできる。ただし、例えば端子絶縁材１０の上面と下面に同様の形状の凸部と凹部が形成されている場合には、上記端子絶縁材１０との相違が不明瞭となることがある。 Further, the terminal insulating material 10 may be configured to lock the base portion 4 a of the external terminal 4 and to be locked to the rotation preventing portion 3 b of the lid plate 3. That is, for example, the terminal insulating material 10 is made of a block made of synthetic resin, and has a convex portion or a concave portion that locks the pedestal portion 4a on the upper surface, and a convex portion that is locked on the lower surface by the detent portion 3b. Or a recess or the like. However, for example, when convex and concave portions having the same shape are formed on the upper and lower surfaces of the terminal insulating material 10, the difference from the terminal insulating material 10 may become unclear.

さらに、上記のような端子絶縁材１０に代えて、蓋板３の上面における少なくとも回り止め部３ｂの表面を覆う端子絶縁層を用いることもできる。このような端子絶縁層としては、例えば回り止め部３ｂの表面に射出成形された合成樹脂層、又は、塗布焼成や堆積等により形成された合成樹脂層やセラミックス層等を用いることもでき、回り止め部３ｂの表面に熱融着や接着等により接合された合成樹脂フィルム等の層であってもよい。 Furthermore, instead of the terminal insulating material 10 as described above, a terminal insulating layer that covers at least the surface of the anti-rotation portion 3b on the upper surface of the cover plate 3 may be used. As such a terminal insulating layer, for example, a synthetic resin layer injection-molded on the surface of the anti-rotation portion 3b, or a synthetic resin layer or a ceramic layer formed by coating, baking, deposition, or the like can be used. It may be a layer such as a synthetic resin film joined to the surface of the stopper 3b by heat fusion or adhesion.

また、上記では、外部端子４を蓋板３と絶縁するために端子絶縁材１０や端子絶縁層を用いる場合を示したが、例えば外部端子４が蓋板３と導通してもよいというように、外部端子４の絶縁を考慮しなくてもよい事情があるときには、これらの端子絶縁材１０や端子絶縁層を用いることなく、外部端子４の台座部４ａが直接蓋板３の回り止め部３ｂに係止されるようにしてもよい。 In the above description, the terminal insulating material 10 and the terminal insulating layer are used to insulate the external terminal 4 from the cover plate 3. For example, the external terminal 4 may be electrically connected to the cover plate 3. When there is no need to consider the insulation of the external terminal 4, the base 4 a of the external terminal 4 is directly connected to the anti-rotation part 3 b of the lid 3 without using the terminal insulating material 10 or the terminal insulating layer. You may make it latch on.

また、上記実施形態では、集電接続体５と補助端子８が正極側ではアルミニウム又はアルミニウム合金からなり負極側では銅又は銅合金からなる場合を示したが、電池の種類に応じた導電金属材料であれば、これらの材料は任意である。さらに、上記実施形態では、外部端子４と接続導体９の材料についても例示したが、強度や導電性等の特性が適合する導電金属材料であれば、これらの材料も任意である。 In the above embodiment, the case where the current collector connector 5 and the auxiliary terminal 8 are made of aluminum or an aluminum alloy on the positive electrode side and copper or copper alloy on the negative electrode side is shown, but the conductive metal material according to the type of the battery If so, these materials are optional. Furthermore, in the said embodiment, although illustrated about the material of the external terminal 4 and the connection conductor 9, as long as it is a conductive metal material with which characteristics, such as intensity | strength and electroconductivity, are compatible, these materials are also arbitrary.

また、上記実施形態では、外部端子４の台座部４ａの上面からボルト部４ｂが突設される場合を示したが、このボルト部４ｂの代わりに、円筒形や多角形の筒状等の適宜形状の突出部が突設され、この突出部の上端面にねじ穴が穿設されているような場合であっても、同様に実施可能である。 Moreover, in the said embodiment, although the case where the bolt part 4b protruded from the upper surface of the base part 4a of the external terminal 4 was shown, instead of this bolt part 4b, cylindrical shape, polygonal cylindrical shape, etc. suitably Even in the case where a protruding portion having a shape protrudes and a screw hole is formed in the upper end surface of the protruding portion, the embodiment can be similarly implemented.

また、上記実施形態では、補助端子８の第２かしめ筒８ｃを接続導体９のかしめ孔９ａに通してかしめることにより接続固定する場合を示したが、補助端子８と接続導体９の接続固定手段は任意であり、例えば補助端子８の台座部８ａの上面に接続導体９の一端部を溶接等により固着して接続固定することもできる。 In the above embodiment, the case where the second caulking cylinder 8c of the auxiliary terminal 8 is connected and fixed by caulking through the caulking hole 9a of the connecting conductor 9 is shown. However, the auxiliary terminal 8 and the connecting conductor 9 are fixedly connected. The means is arbitrary. For example, one end of the connection conductor 9 can be fixed to the upper surface of the base portion 8a of the auxiliary terminal 8 by welding or the like.

また、接続導体９の他端部に形成されるのは、下方から外部端子４のボルト部を貫通させて接続するようにした端子貫通孔９ｂに限らず、このボルト部４ｂが接続されるようになった端子接続部であればどのようなものでもよく、例えば切欠き溝のようなものであってもよい。さらに、この接続導体９は、他端部に端子接続部が形成されていれば、必ずしも板状である必要はない。さらに、接続導体９が補助端子８に接続固定されるのは一端部に限らず、接続導体９の一部であればどの部位でもよく、端子接続部も、この補助端子８に接続固定される部位以外の他の部位であればどこに形成されていてもよい。 Moreover, what is formed in the other end part of the connection conductor 9 is not limited to the terminal through hole 9b that is connected through the bolt part of the external terminal 4 from below, so that this bolt part 4b is connected. Any terminal connection part can be used, for example, a notch groove. Further, the connection conductor 9 does not necessarily have a plate shape as long as the terminal connection portion is formed at the other end. Further, the connection conductor 9 is connected and fixed to the auxiliary terminal 8 not only at one end portion, but may be any part as long as it is a part of the connection conductor 9, and the terminal connection portion is also connected and fixed to the auxiliary terminal 8. Any part other than the part may be formed.

また、上記実施形態では、接続導体９を用いる場合を示したが、この接続導体９に代えて、補助端子８の上部から引き出され、この引き出された部分に端子接続部が形成された接続導体部を用いるようにしてもよい。この場合、接続導体部は、補助端子８と一体のものであるため、接続導体９が不要となり部品点数を削減できると共に、この接続導体９とのかしめ作業が不要となるので、組み立て作業工数も削減できる。 Moreover, although the case where the connection conductor 9 was used was shown in the said embodiment, it replaced with this connection conductor 9, and was pulled out from the upper part of the auxiliary terminal 8, and the connection conductor by which the terminal connection part was formed in this extracted part May be used. In this case, since the connecting conductor portion is integrated with the auxiliary terminal 8, the connecting conductor 9 is not necessary, and the number of parts can be reduced, and the caulking work with the connecting conductor 9 is not required. Can be reduced.

また、上記実施形態では、補助端子８と発電要素２の電極との間の接続を集電接続体５を介して行う場合を示したが、この補助端子８と電極との間の接続構造は任意であり、上記実施形態とは異なる集電接続体を用いてもよいし、他の手段によって接続を行うようにしてもよい。さらに、発電要素２も、長円筒形の巻回型のものには限定されず、他の形状のものでもよく、積層型のものであってもよい。 Moreover, in the said embodiment, although the case where the connection between the auxiliary terminal 8 and the electrode of the electric power generation element 2 was performed via the current collection connection body 5 was shown, the connection structure between this auxiliary terminal 8 and an electrode is shown. It is optional, and a current collector connector different from the above embodiment may be used, or connection may be made by other means. Furthermore, the power generation element 2 is not limited to a long cylindrical winding type, and may be of other shapes or a laminated type.

また、上記実施形態では、補助端子８の台座部８ａや外部絶縁封止材６が八角柱状である場合を示したが、これら台座部８ａや外部絶縁封止材６の形状は任意であり、外部絶縁封止材６にも、必ずしも補助端子凹部６ｂを設ける必要はない。さらに、上記実施形態では、補助端子８が台座部８ａの下面から第１かしめ筒８ｂを突設したものである場合を示したが、上部が蓋板３上に配置され、下部が端子引出貫通孔３ａを通して電池容器１内部に嵌入していれば、必ずしも台座部８ａや第１かしめ筒８ｂを有する必要はなく、特に第１かしめ筒８ｂは、上記補助端子８と電極との間の接続構造に応じて任意の構成のものに変更することができる。 Moreover, in the said embodiment, although the case where the base part 8a of the auxiliary terminal 8 and the external insulation sealing material 6 were octagonal column shape was shown, the shape of these base parts 8a and the external insulation sealing material 6 is arbitrary, The external insulating sealing material 6 is not necessarily provided with the auxiliary terminal recess 6b. Furthermore, although the case where the auxiliary terminal 8 has the first caulking tube 8b protruding from the lower surface of the pedestal portion 8a is shown in the above embodiment, the upper portion is disposed on the cover plate 3, and the lower portion is the terminal lead-through. If it is inserted into the battery case 1 through the hole 3a, it is not always necessary to have the pedestal portion 8a and the first caulking cylinder 8b. In particular, the first caulking cylinder 8b has a connection structure between the auxiliary terminal 8 and the electrode. It can be changed to an arbitrary configuration according to the above.

また、上記実施形態では、封止材として外部絶縁封止材６と内部絶縁封止材７を用いる場合を示したが、補助端子８と蓋板３との間の封止するものであれば任意の封止材を用いることができる。例えば、補助端子８には締め付けトルクが加わらないので、ハーメチックシールによって蓋板３に封止固着してもよいし、シート状や接着剤状の封止材を用いることもできる。 Moreover, in the said embodiment, although the case where the external insulation sealing material 6 and the internal insulation sealing material 7 were used as a sealing material was shown, if it seals between the auxiliary terminal 8 and the cover board 3, it will be shown. Any sealing material can be used. For example, since the tightening torque is not applied to the auxiliary terminal 8, it may be sealed and fixed to the cover plate 3 by a hermetic seal, or a sheet-like or adhesive-like sealing material may be used.

また、上記実施形態では、外部端子４と補助端子８とを別部品とする場合を示したが、図６に示すように、外部端子４が補助端子８も兼用することにより、この補助端子８や接続導体９を用いないようにすることもできる。即ち、図６に示す非水電解質二次電池は、外部端子４のかしめ筒４ｃが、補助端子８の第１かしめ筒８ｂの代わりに電池容器１内に嵌入して集電接続体５の接続部５ａにかしめられるようになっている。そして、蓋板３では、上方に四角形状に突出させた凸部からなる回り止め部３ｂのこの凸部の中央部に端子引出貫通孔３ａを開口している。さらに、外部絶縁封止材６は、端子絶縁材１０を兼用するために、上面には外部端子４の回り止め凹部４ｄに嵌合する四角形の凸部を有し、下面には蓋板３の回り止め部３ｂに嵌合する四角形の凹部を有する係止部６ｃが設けられると共に、この係止部６ｃの中央部に外部絶縁封止材６の本来の貫通孔が形成されている。 In the above-described embodiment, the external terminal 4 and the auxiliary terminal 8 are shown as separate parts. However, as shown in FIG. 6, the external terminal 4 also serves as the auxiliary terminal 8. Alternatively, the connection conductor 9 can be omitted. That is, in the nonaqueous electrolyte secondary battery shown in FIG. 6, the caulking cylinder 4 c of the external terminal 4 is fitted into the battery container 1 instead of the first caulking cylinder 8 b of the auxiliary terminal 8 to connect the current collector connection body 5. It can be crimped to the part 5a. And in the cover plate 3, the terminal extraction through-hole 3a is opened in the center part of this convex part of the rotation prevention part 3b which consists of a convex part projected upwards in the shape of a rectangle. Further, the external insulating sealing material 6 also has a quadrangular convex portion that fits in the rotation-preventing concave portion 4d of the external terminal 4 on the upper surface so that the terminal insulating material 10 is also used, and the lower surface of the lid plate 3 A locking portion 6c having a square recess to be fitted to the rotation preventing portion 3b is provided, and an original through hole of the external insulating sealing material 6 is formed at the center of the locking portion 6c.

上記図６に示した非水電解質二次電池の場合も、ナットをボルト部４ｂに締め付ける際に回転しようとする外部端子４は、回り止め凹部４ｄに外部絶縁封止材６を介して嵌合した蓋板３の回り止め部３ｂによって確実に回り止めされる。しかも、蓋板の回り止め部は、蓋板のプレス加工時に端子引出貫通孔３ａや安全弁３ｄと共に容易に一体的に形成することができ、サイズの異なる電池の端子構造も共通化させることができる。そして、この場合も、回り止め部３ｂと外部絶縁封止材６と外部端子４の形状は上記と同様に任意であり、他の構成も上記と同様に適宜変更することができる。 In the case of the non-aqueous electrolyte secondary battery shown in FIG. 6 as well, the external terminal 4 to be rotated when the nut is fastened to the bolt part 4b is fitted into the anti-rotation recess 4d via the external insulating sealing material 6. The lid plate 3 is reliably prevented from being rotated by the rotation preventing portion 3b. Moreover, the detent portion of the lid plate can be easily formed integrally with the terminal lead-through hole 3a and the safety valve 3d when the lid plate is pressed, and the terminal structure of the batteries having different sizes can be made common. . Also in this case, the shapes of the anti-rotation portion 3b, the external insulating sealing material 6 and the external terminal 4 are arbitrary as described above, and other configurations can be appropriately changed as described above.

また、上記実施形態では、電池容器１や蓋板３がアルミニウム合金や鋼等からなる場合を示したが、これら電池容器１や蓋板３の材質は任意であり、金属以外のものを用いてもよく、例えば絶縁性の材質を用いることもできる。さらに、これら電池容器１と蓋板３の形状や構造も、上記実施形態に限定されず任意である。 Moreover, in the said embodiment, although the case where the battery container 1 and the cover plate 3 consist of aluminum alloys, steel, etc. was shown, the material of these battery containers 1 and the cover plate 3 is arbitrary, and uses things other than a metal. For example, an insulating material can be used. Furthermore, the shapes and structures of the battery container 1 and the cover plate 3 are not limited to the above embodiment and are arbitrary.

また、上記実施形態では、大型の非水電解質二次電池について説明したが、電池の種類や大きさ（容量）も任意である。 Moreover, in the said embodiment, although the large sized non-aqueous electrolyte secondary battery was demonstrated, the kind and magnitude | size (capacity) of a battery are also arbitrary.

１電池容器
２発電要素
２ａ金属箔
３蓋板
３ａ端子引出貫通孔
３ｂ回り止め部10
３ｃ回り止め凹部
４外部端子
４ａ台座部
４ｂボルト部
４ｃかしめ筒
４ｄ回り止め凹部
５集電接続体
５ａ接続部
６外部絶縁封止材
６ａ外部端子凹部20
６ｂ補助端子凹部
７内部絶縁封止材
８補助端子
８ａ台座部
８ｂ第１かしめ筒
８ｃ第２かしめ筒
９接続導体
９ａかしめ孔
９ｂ端子貫通孔
１０端子絶縁材30 DESCRIPTION OF SYMBOLS 1 Battery container 2 Power generation element 2a Metal foil 3 Cover plate 3a Terminal extraction through-hole 3b Non-rotation part
3c Anti-rotation recess 4 External terminal 4a Base 4b Bolt 4c Caulking cylinder 4d Anti-rotation recess 5 Current collector connector 5a Connection 6 External insulation sealing material 6a External terminal recess 20
6b Auxiliary terminal recess 7 Internal insulating sealing material 8 Auxiliary terminal 8a Pedestal portion 8b First caulking cylinder 8c Second caulking cylinder 9 Connection conductor 9a Caulking hole 9b Terminal through hole 10 Terminal insulating material 30

Claims

発電要素を収納し且つ開口部を有する電池容器と、
前記電池容器の開口部を塞ぐ蓋板と、
台座部と該台座部から延びるボルト部とを有する外部端子と、
前記台座部と嵌合した状態で前記蓋板の上面に配置される樹脂部材と、を備え、
前記蓋板は、複数の凸部を有し、
前記複数の凸部は、互いに略平行な突条であり、
前記樹脂部材は、前記蓋板における複数の凸部が嵌り込む凹部と該凹部の反対側に前記複数の凸部と同様の形状の部位とを有すると共に、該凹部が前記蓋板における複数の凸部が設けられた部位と凹凸嵌合し且つ前記複数の凸部と同様の形状の部位が前記台座部と前記嵌合することを特徴とする電池。 A battery container that houses a power generation element and has an opening;
A lid plate for closing the opening of the battery case;
An external terminal having a pedestal portion and a bolt portion extending from the pedestal portion ;
A resin member disposed on the upper surface of the lid plate in a state of being fitted to the pedestal portion ,
The lid plate has a plurality of convex portions,
The plurality of convex portions are ridges substantially parallel to each other,
The resin member has a concave portion into which a plurality of convex portions in the lid plate are fitted, and a portion having the same shape as the plurality of convex portions on the opposite side of the concave portion, and the concave portion has a plurality of convex portions in the lid plate. A battery characterized in that a portion having a protrusion and recess is fitted to a portion provided with a portion and a portion having the same shape as the plurality of convex portions is fitted to the pedestal portion .

発電要素を収納し且つ開口部を有する電池容器と、
前記電池容器の開口部を塞ぐ蓋板と、
台座部と該台座部から延びるボルト部とを有する外部端子と、
前記台座部と嵌合した状態で前記蓋板の上面に配置される樹脂部材と、を備え、
前記蓋板は、前記ボルト部の軸方向視において四角状の周面を有する凸部を有し、
前記樹脂部材は、前記蓋板における凸部が嵌り込む凹部と該凹部の反対側に前記凸部と同様の形状の部位とを有すると共に、該凹部が前記蓋板における凸部が設けられた部位と凹凸嵌合し且つ前記凸部と同様の形状の部位が前記台座部と前記嵌合することを特徴とする電池。 A battery container that houses a power generation element and has an opening;
A lid plate for closing the opening of the battery case;
An external terminal having a pedestal portion and a bolt portion extending from the pedestal portion;
A resin member disposed on the upper surface of the lid plate in a state of being fitted to the pedestal portion,
The lid plate has a convex part having a square peripheral surface in the axial direction view of the bolt part,
The resin member has a concave portion into which the convex portion of the lid plate is fitted and a portion having the same shape as the convex portion on the opposite side of the concave portion, and the concave portion is provided with the convex portion of the lid plate. The battery is characterized in that a concave and convex portion and a portion having the same shape as the convex portion are fitted to the pedestal portion .

前記蓋板において、前記凸部と他の部位とは、一体である、請求項１又は２に記載の電池。 In the cover plate, the convex portion and the other portions are integral battery according to claim 1 or 2.

前記樹脂部材は、少なくとも、前記外部端子と、前記蓋板における複数の凸部が設けられた部位と、の間に配置される、請求項１〜３のいずれか１項に記載の電池。 The battery according to claim 1, wherein the resin member is disposed at least between the external terminal and a portion provided with a plurality of convex portions in the lid plate.