JP3783082B2 - Sealed battery - Google Patents

Sealed battery Download PDF

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Publication number
JP3783082B2
JP3783082B2 JP02737499A JP2737499A JP3783082B2 JP 3783082 B2 JP3783082 B2 JP 3783082B2 JP 02737499 A JP02737499 A JP 02737499A JP 2737499 A JP2737499 A JP 2737499A JP 3783082 B2 JP3783082 B2 JP 3783082B2
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Japan
Prior art keywords
shaft portion
shaft
gasket
lid
hole
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JP2000228175A (en
Inventor
良樹 杣友
佳明 泉
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Hitachi Maxell Energy Ltd
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Hitachi Maxell Energy Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、電池ケースが密封してある密閉型の電池に関する。
【０００２】
【従来の技術】
密閉型の電池においては、電池ケースの開口を蓋で密封する。蓋には、負極端子（出力端子）がプラスチック製のガスケットを介して、蓋壁を内外に貫通する状態で固定してある。ガスケットは負極端子と蓋との直接接触を避ける絶縁体を兼ねている。多くの場合、負極端子はガスケットの外面に露出する頭部と、ガスケットに内嵌する軸部とを有し、軸部の下端をかしめ処理することによって、ガスケットと一体化され、蓋に対して抜け外れ不能に固定してある。
【０００３】
【発明が解決しようとする課題】
上記のように、負極端子をガスケットに対してかしめ固定する密閉型電池においては、軸部の下端をかしめ処理する際に軸部が僅かに膨張変形し、ガスケットに設けた軸挿通穴と密着して、軸部とガスケットとの間の隙間を封止する。しかし、軸部および軸挿通穴の仕上り寸法のばらつきや、かしめ処理時の軸部の変形量のばらつき等によって、軸部の軸挿通穴に対する密着度合が不足してシール不良を生じ、液漏れの原因になることがあった。とくに、電池ケースに内圧が作用する電池の場合には液漏れを生じやすい。
【０００４】
かしめ処理した後に負極端子とガスケットの密着度合を確認することは不可能ではないが、その分だけ電池の製造コストが高く付く。例えば、ねじを用いて、軸部と軸挿通穴の密着度を向上することも考えられるが、部品数の増加と、組み立て工数とが増えるのを避けられず、この場合にも製造コストが増加する。
【０００５】
この発明の目的は、従来と同様に出力端子をかしめ処理してガスケットに固定する構造を採りながら、軸部とガスケットとの密着度を向上し、以て軸部のシール不良に基づく液漏れを一掃し、密閉型電池の信頼性を向上することにある。
この発明の他の目的は、ガスケットの一部を変更することにより、軸部とガスケットとの間のシール不良を一掃でき、従って液漏れのない信頼性に優れた密閉型の電池をより低コストで提供することにある。
【０００６】
【課題を解決するための手段】
この発明は、電池ケース１の開口を塞ぐ蓋６に、一方の出力端子９がガスケット８を介してかしめ固定してある密閉型の電池を対象とする。その出力端子９は、ガスケット８の外面に露出する頭部２０と、頭部２０より小径の軸部２１と、軸部２１の下端に形成されたかしめ軸部２２とを備えている。ガスケット８は、頭部２０と蓋６とで挟持されるフランジ部２３と、蓋６に通設した取付穴１２に内嵌するボス部２４とを有する。ボス部２４には軸部２１と嵌合する軸挿通穴２５が上下貫通状に設けられてある。軸挿通穴２５の一部には、軸部２１より小径のシール穴２６を周回状に形成する。以て、出力端子９をガスケット８に組み付けた状態において、シール穴２６が軸部２１で拡径変形されるようにしたものである。
【０００７】
シール穴２６は軸挿通穴２５の下端に形成する。シール穴２６の直径寸法Ｄ２は、軸部２１の直径寸法Ｄ１を基準値にして、Ｄ１×（１−0.３）≦Ｄ２≦Ｄ１×（１−0.１）を満足するよう設定する。
【０００８】
【作用】
ガスケット８の軸挿通穴２５の一部には軸部２１より小径のシール穴２６を設け、出力端子９をガスケット８に組み付けた状態において、シール穴２６を軸部２１で強制的に拡径変形させるので、軸部２１や軸挿通穴２５の仕上り寸法にばらつきがあっても、軸部２１とシール穴２６とを確実に密着させて、両者２１・２６間の隙間を確実に封止できる。プラスチック成形品からなるガスケット８にシール穴２６を付加することにより、軸部２１とガスケット８との隙間を封止するので、部品点数や組み立て工数の増加を伴うことなく、液漏れのない密閉型の電池を構成できる。
【０００９】
かしめ軸部２２をかしめ処理するとき、軸部２１の下端は僅かに膨張変形する。従って、シール穴２６を軸挿通穴２５の下端に形成しておけば、シール穴２６と軸部２１とをより強固に密着させて、シール作用を強化でき、軸部２１を軸挿通穴２５に嵌入するときのシール穴２６による抵抗力を軽減し、出力端子９の組み付けがより容易に行える。
【００１０】
【実施例】
図１ないし図４は、この発明を角形のリチウムイオン二次電池に適用した実施例を示す。図２において、その電池は上面が開口する縦長角箱状の電池ケース１と、電池ケース１内に装填された電極体２および電解液と、電池ケース１の開口を塞ぐ封口部材などで構成する。電池ケース１はニッケル板を深絞り加工して形成してあり、正極側の出力端子を兼ねている。電極体２はＬｉＣｏＯ2 を活物質とするシート状の正極と、黒鉛を活物質とするシート状の負極とをセパレータを間にして渦巻状に巻回した後、全体を電池ケース１の断面形状に合致して断面四角形状に押し潰し変形して形成してあり、その正極シートおよび負極シートのそれぞれから導電タブ４・５が上向きに導出されている。
【００１１】
封口部材は、電池ケース１の上面開口を塞ぐ蓋６と、蓋６の内側に配置されるプラスチック製のインシュレータ７と、蓋６に対してガスケット８を介してかしめ固定される負極端子（出力端子）９と、負極端子９と同時にかしめ固定される押え板１０などからなる。
【００１２】
蓋６はアルミニウム合金板材を素材にしたプレス成形品からなり、図１に示すごとく、その板面中央にガスケット８用の取付穴１２を長円状に通設してあり、取付穴１２の一側板面に防爆用の開裂ベント１３を設け、他側板面に電解液用の注入口１４を通設してなる。取付穴１２の上面側の開口周縁壁には、ガスケット８用の受座１５が凹み形成されている。開裂ベント１３は、断続的に周回する切溝で囲まれていて、ケース内圧が一定値を越えると、切溝が破断してガスを放出する。注入口１４は電解液を注入したのちプラグ１６で閉止し、この状態でプラグ１６を蓋６に溶接してある。
【００１３】
図１において負極端子９は、長円状の頭部２０と、頭部２０より小径の軸部２１と、軸部２１の下端に形成したかしめ軸部２２とを有するアルミニウム製の軸体からなる。かしめ軸部２２は下向きに開口する中空の筒軸状を呈しており、この筒壁の下半側を拡径し反転状にかしめ変形することになる。
【００１４】
ガスケット８は、長円状のフランジ部２３と、フランジ部２３の下面に突設した丸軸状のボス部２４とを一体に形成したプラスチック成形品からなり、ボス部２４の中央に、先の軸部２１が嵌合する軸挿通穴２５を上下貫通状に設けてある。軸挿通穴２５の下端には、軸部２１より小径のシール穴２６を周回状に形成する。このシール穴２６を設けることによって、負極端子９を蓋６にかしめ固定した状態において、軸部２１とガスケット８との隙間を完全に封止し、液漏れを防ぐ。
【００１５】
封口部の組み付けは次の手順で行う。まずインシュレータ７を電池ケース１に内嵌装着した後、ガスケット８のボス部２４を蓋６の取付穴１２に嵌挿し、さらに負極端子９を軸挿通穴２５に挿嵌する。このとき軸部２１はシール穴２６を拡径状に弾性変形させるので、両者２１・２６は隙間なく密着する。この後、図４に示すごとく軸部２１に負極用の絶縁体２７を介して孔明きの押え板１０を外嵌し、この状態でかしめ軸部２２をかしめ処理することにより、フランジ部２３を頭部２０と蓋６の上面とで挟持固定できる。同時に、拡開変形したかしめ軸部２２と蓋６の内面とでボス部２４の下端を挟持固定できる。このとき、軸部２１の下部は図４に示すように、かしめ処理によって自由状態時よりも僅かに拡径変形する。従って、軸部２１の下側の部分をシール穴２６にさらに密着させて、軸挿通穴２５を確実に封止できる。
【００１６】
上記の組立体の押え板１０に負極側の導電タブ５を溶接し、正極側の導電タブ４を蓋６の内面に溶接する。この後に、蓋６を電池ケース１に内嵌したうえで、蓋６と電池ケース１との嵌合面を溶接して封止する。最後に注入口１４から電解液をケース内へ注入したのち、注入口１４にプラグ１６を内嵌して溶接し、注入口１４を封止することにより電池を完成する。
【００１７】
軸部２１、軸挿通穴２５およびシール穴２６の各直径寸法は、それぞれ次のように設定する。軸部２１の直径Ｄ１は軸挿入穴２５の直径寸法Ｄ３と同じか、前者直径Ｄ１を後者直径Ｄ３より僅かに小さく設定する。シール穴２６の直径寸法Ｄ２は、軸挿通穴２５の直径寸法Ｄ３より小さく、さらに軸部２１の直径寸法Ｄ１より小さく設定する。より具体的には、Ｄ１×（１−0.３）≦Ｄ２≦Ｄ１×（１−0.１）とする。シール穴２６の直径寸法Ｄ２が0.７Ｄ１未満であると、軸部２１を軸挿通穴２５に挿通する際の抵抗が大き過ぎ、組立てにくくなる。逆に直径寸法Ｄ２が0.９Ｄ１を越えると、軸部２１の直径寸法のばらつきが小径側へ片寄っている場合に、軸部２１とシール穴２６を完全に密着できないおそれがあるからである。
【００１８】
上記の実施例では、出力端子９が負極側の端子である場合について説明したが、正極側の端子であってもよい。シール穴２６は軸挿通穴２５の任意位置に形成でき、必要があれば複数個所に形成することができる。
【００１９】
【発明の効果】
この発明では、ガスケット８の軸挿通穴２５にシール穴２６を設けておき、出力端子９の軸部２１を軸挿通穴２５に挿嵌した状態において、シール穴２６を軸部２１で拡径状に変形させ、軸部２１と軸挿通穴２５との間の隙間を確実に封止できるようにした。従って、従前同様に出力端子９をかしめ固定する構造を採りながら、軸部２１とガスケット８との間を確実に封止して、軸部２１のシール不良に基づく液漏れを一掃でき、その分だけ密閉型電池の信頼性が向上する。軸挿通穴２５にこれより小径のシール穴２６を付加して軸部２１のシール不良を回避しているので、部品数の増加等のコスト増を伴うことなくシール作用を強化できる利点を有し、液漏れのない密閉型の電池をより低コストで提供できる。
【図面の簡単な説明】
【図１】出力端子とガスケットとを分離した状態での縦断面図である。
【図２】電池の縦断面図である。
【図３】電池の平面図である。
【図４】図２におけるＡ−Ａ線断面図である。
【符号の説明】
１ 電池ケース
６ 蓋
８ ガスケット
９ 出力端子
１２ 取付穴
２０ 頭部
２１ 軸部
２２ かしめ軸部
２３ フランジ部
２４ ボス部
２５ 軸挿通穴
２６ シール穴[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealed battery in which a battery case is sealed.
[0002]
[Prior art]
In a sealed battery, the opening of the battery case is sealed with a lid. A negative electrode terminal (output terminal) is fixed to the lid through a plastic gasket so as to penetrate the lid wall inward and outward. The gasket also serves as an insulator that avoids direct contact between the negative electrode terminal and the lid. In many cases, the negative electrode terminal has a head portion exposed on the outer surface of the gasket and a shaft portion fitted into the gasket, and is integrated with the gasket by caulking the lower end of the shaft portion, and is attached to the lid. It is fixed so that it cannot be removed.
[0003]
[Problems to be solved by the invention]
As described above, in a sealed battery in which the negative electrode terminal is caulked and fixed to the gasket, when the lower end of the shaft portion is caulked, the shaft portion is slightly expanded and deformed, and is in close contact with the shaft insertion hole provided in the gasket. Then, the gap between the shaft portion and the gasket is sealed. However, due to variations in the finished dimensions of the shaft and shaft insertion hole, and variations in the amount of deformation of the shaft during caulking, the degree of contact between the shaft and the shaft insertion hole is insufficient, resulting in poor sealing and liquid leakage. There was a cause. In particular, in the case of a battery in which internal pressure acts on the battery case, liquid leakage tends to occur.
[0004]
Although it is not impossible to confirm the degree of adhesion between the negative electrode terminal and the gasket after the caulking process, the manufacturing cost of the battery increases accordingly. For example, it is possible to improve the adhesion between the shaft part and the shaft insertion hole using screws, but it is inevitable that the number of parts and assembly man-hours will increase, and in this case also the manufacturing cost will increase. To do.
[0005]
The object of the present invention is to improve the adhesion between the shaft and the gasket while adopting a structure in which the output terminal is caulked and fixed to the gasket as in the prior art, thereby preventing liquid leakage due to poor sealing of the shaft. It is to wipe out and improve the reliability of the sealed battery.
Another object of the present invention is to change a part of the gasket so that the sealing failure between the shaft portion and the gasket can be eliminated. Therefore, a highly reliable sealed battery with no leakage of liquid can be obtained at a lower cost. There is to provide in.
[0006]
[Means for Solving the Problems]
The present invention is directed to a sealed battery in which one output terminal 9 is caulked and fixed to a lid 6 that closes the opening of the battery case 1 via a gasket 8. The output terminal 9 includes a head portion 20 exposed on the outer surface of the gasket 8, a shaft portion 21 having a smaller diameter than the head portion 20, and a caulking shaft portion 22 formed at the lower end of the shaft portion 21. The gasket 8 has a flange portion 23 sandwiched between the head portion 20 and the lid 6, and a boss portion 24 that fits inside the attachment hole 12 provided in the lid 6. The boss portion 24 is provided with a shaft insertion hole 25 that fits with the shaft portion 21 in a vertically penetrating manner. In a part of the shaft insertion hole 25, a seal hole 26 having a smaller diameter than the shaft portion 21 is formed in a circular shape. Thus, in the state where the output terminal 9 is assembled to the gasket 8, the seal hole 26 is expanded and deformed by the shaft portion 21.
[0007]
The seal hole 26 is formed at the lower end of the shaft insertion hole 25. The diameter dimension D2 of the seal hole 26 is set so as to satisfy D1 × (1-0.3) ≦ D2 ≦ D1 × (1-0.1) with the diameter dimension D1 of the shaft portion 21 as a reference value.
[0008]
[Action]
A seal hole 26 having a diameter smaller than that of the shaft portion 21 is provided in a part of the shaft insertion hole 25 of the gasket 8, and the seal hole 26 is forcibly enlarged and deformed by the shaft portion 21 in a state where the output terminal 9 is assembled to the gasket 8. Therefore, even if the finished dimensions of the shaft portion 21 and the shaft insertion hole 25 vary, the shaft portion 21 and the seal hole 26 can be securely brought into close contact with each other, and the gap between the two portions 21 and 26 can be reliably sealed. By adding a seal hole 26 to the gasket 8 made of a plastic molded product, the gap between the shaft portion 21 and the gasket 8 is sealed, so that there is no increase in the number of parts and assembly man-hours and there is no liquid leakage. Can be configured.
[0009]
When the caulking shaft portion 22 is caulked, the lower end of the shaft portion 21 is slightly expanded and deformed. Therefore, if the seal hole 26 is formed at the lower end of the shaft insertion hole 25, the seal hole 26 and the shaft portion 21 can be more firmly adhered to each other, and the sealing action can be strengthened. The resistance force due to the seal hole 26 when fitted is reduced, and the output terminal 9 can be assembled more easily.
[0010]
【Example】
1 to 4 show an embodiment in which the present invention is applied to a prismatic lithium ion secondary battery. In FIG. 2, the battery is composed of a vertically long rectangular box-shaped battery case 1 whose upper surface is open, an electrode body 2 and an electrolyte loaded in the battery case 1, a sealing member that closes the opening of the battery case 1, and the like. . The battery case 1 is formed by deep drawing a nickel plate, and also serves as an output terminal on the positive electrode side. The electrode body 2 is formed by winding a sheet-like positive electrode using LiCoO 2 as an active material and a sheet-like negative electrode containing graphite as an active material in a spiral shape with a separator interposed therebetween, and then the entire cross-sectional shape of the battery case 1 The conductive tabs 4 and 5 are led out upward from the positive electrode sheet and the negative electrode sheet, respectively.
[0011]
The sealing member includes a lid 6 that closes the upper surface opening of the battery case 1, a plastic insulator 7 that is disposed inside the lid 6, and a negative terminal (output terminal) that is caulked and fixed to the lid 6 via a gasket 8. ) 9 and a holding plate 10 that is caulked and fixed simultaneously with the negative electrode terminal 9.
[0012]
The lid 6 is made of a press-molded product made of an aluminum alloy plate material. As shown in FIG. 1, an attachment hole 12 for the gasket 8 is inserted in the center of the plate surface in an oval shape. An explosion-proof cleavage vent 13 is provided on the side plate surface, and an electrolyte inlet 14 is provided on the other side plate surface. A seat 15 for the gasket 8 is formed in a recess in the opening peripheral wall on the upper surface side of the mounting hole 12. The cleavage vent 13 is surrounded by a cut groove that circulates intermittently. When the internal pressure of the case exceeds a certain value, the cut groove breaks and releases gas. The injection port 14 is closed with a plug 16 after injecting an electrolytic solution, and the plug 16 is welded to the lid 6 in this state.
[0013]
In FIG. 1, the negative electrode terminal 9 is composed of an aluminum shaft body having an oval head portion 20, a shaft portion 21 having a smaller diameter than the head portion 20, and a caulking shaft portion 22 formed at the lower end of the shaft portion 21. . The caulking shaft portion 22 has a hollow cylindrical shaft shape that opens downward, and the lower half side of the cylindrical wall is enlarged to be caulked and deformed in an inverted manner.
[0014]
The gasket 8 is made of a plastic molded product in which an oval flange portion 23 and a round shaft-shaped boss portion 24 projecting from the lower surface of the flange portion 23 are integrally formed. A shaft insertion hole 25 into which the shaft portion 21 is fitted is provided in a vertically penetrating manner. A seal hole 26 having a smaller diameter than the shaft portion 21 is formed in a circular shape at the lower end of the shaft insertion hole 25. By providing the seal hole 26, the gap between the shaft portion 21 and the gasket 8 is completely sealed in a state where the negative electrode terminal 9 is caulked and fixed to the lid 6, thereby preventing liquid leakage.
[0015]
The sealing part is assembled by the following procedure. First, after the insulator 7 is fitted into the battery case 1, the boss portion 24 of the gasket 8 is fitted into the mounting hole 12 of the lid 6, and the negative electrode terminal 9 is further fitted into the shaft insertion hole 25. At this time, since the shaft portion 21 elastically deforms the seal hole 26 in a diameter-enlarged shape, the both 21 and 26 are in close contact with each other without a gap. Thereafter, as shown in FIG. 4, the perforated presser plate 10 is externally fitted to the shaft portion 21 via the negative electrode insulator 27, and the caulking shaft portion 22 is caulked in this state, whereby the flange portion 23 is removed. The head 20 and the upper surface of the lid 6 can be clamped and fixed. At the same time, the lower end of the boss portion 24 can be clamped and fixed by the caulking shaft portion 22 that has been expanded and deformed and the inner surface of the lid 6. At this time, as shown in FIG. 4, the lower portion of the shaft portion 21 is slightly enlarged and deformed by caulking, compared to the free state. Therefore, the shaft insertion hole 25 can be reliably sealed by further bringing the lower portion of the shaft portion 21 into close contact with the seal hole 26.
[0016]
The conductive tab 5 on the negative electrode side is welded to the holding plate 10 of the assembly, and the conductive tab 4 on the positive electrode side is welded to the inner surface of the lid 6. After this, the lid 6 is fitted into the battery case 1 and the fitting surface between the lid 6 and the battery case 1 is welded and sealed. Finally, the electrolytic solution is injected into the case from the inlet 14, and then the plug 16 is fitted into the inlet 14 and welded, and the inlet 14 is sealed to complete the battery.
[0017]
The diameter dimensions of the shaft portion 21, the shaft insertion hole 25, and the seal hole 26 are set as follows. The diameter D1 of the shaft portion 21 is set to be the same as the diameter dimension D3 of the shaft insertion hole 25, or the former diameter D1 is set slightly smaller than the latter diameter D3. The diameter dimension D2 of the seal hole 26 is set to be smaller than the diameter dimension D3 of the shaft insertion hole 25 and further smaller than the diameter dimension D1 of the shaft portion 21. More specifically, D1 × (1-0.3) ≦ D2 ≦ D1 × (1-0.1). When the diameter D2 of the seal hole 26 is less than 0.7D1, the resistance when the shaft portion 21 is inserted into the shaft insertion hole 25 is too large, and the assembly becomes difficult. Conversely, if the diameter dimension D2 exceeds 0.9D1, there is a possibility that the shaft part 21 and the seal hole 26 may not be completely adhered when the variation in the diameter dimension of the shaft part 21 is shifted to the small diameter side.
[0018]
In the above embodiment, the case where the output terminal 9 is a negative terminal is described. However, a positive terminal may be used. The seal hole 26 can be formed at an arbitrary position of the shaft insertion hole 25, and can be formed at a plurality of locations if necessary.
[0019]
【The invention's effect】
In the present invention, a seal hole 26 is provided in the shaft insertion hole 25 of the gasket 8, and the diameter of the seal hole 26 is increased by the shaft portion 21 in a state where the shaft portion 21 of the output terminal 9 is inserted into the shaft insertion hole 25. The gap between the shaft portion 21 and the shaft insertion hole 25 can be reliably sealed. Therefore, while adopting the structure in which the output terminal 9 is caulked and fixed as before, the gap between the shaft portion 21 and the gasket 8 can be reliably sealed, and the liquid leakage due to the seal failure of the shaft portion 21 can be eliminated. Only the reliability of the sealed battery is improved. Since the shaft insertion hole 25 is provided with a seal hole 26 having a smaller diameter to avoid a seal failure of the shaft portion 21, it has an advantage that the sealing action can be enhanced without increasing costs such as an increase in the number of parts. Thus, a sealed battery without liquid leakage can be provided at a lower cost.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view in a state in which an output terminal and a gasket are separated.
FIG. 2 is a longitudinal sectional view of a battery.
FIG. 3 is a plan view of a battery.
4 is a cross-sectional view taken along line AA in FIG. 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery case 6 Cover 8 Gasket 9 Output terminal 12 Mounting hole 20 Head part 21 Shaft part 22 Caulking shaft part 23 Flange part 24 Boss part 25 Shaft insertion hole 26 Seal hole

Claims (1)

電池ケース（１）の開口を塞ぐ蓋（６）に、一方の出力端子（９）がガスケット（８）を介してかしめ固定してある密閉型の電池であって、
出力端子（９）は、ガスケット（８）の外面に露出する頭部（２０）と、頭部（２０）より小径の軸部（２１）と、軸部（２１）の下端に形成されたかしめ軸部（２２）とを備えており、
ガスケット（８）は、頭部（２０）と蓋（６）とで挟持されるフランジ部（２３）と、蓋（６）に通設した取付穴（１２）に内嵌するボス部（２４）とを有し、
ボス部（２４）に軸部（２１）と嵌合する軸挿通穴（２５）が上下貫通状に設けてあり、
軸挿通穴（２５）の下端に軸部（２１）より小径のシール穴（２６）が周回状に形成されていて、シール穴（２６）の直径寸法（Ｄ２）が、軸部（２１）の直径寸法（Ｄ１）を基準値にして、Ｄ１×（１− 0. ３）≦Ｄ２≦Ｄ１×（１− 0. １）を満足するよう設定してあり、
出力端子（９）をガスケット（８）に組み付けた状態において、シール穴（２６）が軸部（２１）で拡径変形されることを特徴とする密閉型の電池。 A sealed battery in which one output terminal (9) is caulked and fixed via a gasket (8) to a lid (6) that closes the opening of the battery case (1),
The output terminal (9) includes a head portion (20) exposed on the outer surface of the gasket (8), a shaft portion (21) having a smaller diameter than the head portion (20), and a caulking formed on the lower end of the shaft portion (21). A shaft portion (22),
The gasket (8) includes a flange portion (23) sandwiched between the head portion (20) and the lid (6), and a boss portion (24) fitted in a mounting hole (12) provided in the lid (6). And
A shaft insertion hole (25) for fitting with the shaft portion (21) is provided in the boss portion (24) in a vertically penetrating manner,
A seal hole (26) having a smaller diameter than the shaft portion (21) is formed in a circular shape at the lower end of the shaft insertion hole (25), and the diameter dimension (D2) of the seal hole (26) is equal to that of the shaft portion (21). The diameter dimension (D1) is set as a reference value so that D1 × ( 1−0.3 ) ≦ D2 ≦ D1 × ( 1−0.1 ) is satisfied.
A sealed battery in which the seal hole (26) is expanded and deformed at the shaft portion (21) in a state where the output terminal (9) is assembled to the gasket (8) .
JP02737499A 1999-02-04 1999-02-04 Sealed battery Expired - Fee Related JP3783082B2 (en)

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Application Number Priority Date Filing Date Title
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JP3783082B2 true JP3783082B2 (en) 2006-06-07

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Publication number Priority date Publication date Assignee Title
KR100420761B1 (en) * 2001-07-10 2004-03-02 (주)상아프론테크 Secondary battery cap assembly and method for manufacturing thereof
KR100751310B1 (en) * 2001-09-24 2007-08-22 삼성에스디아이 주식회사 Cap assembly and retangular- type secondary battery therewith
KR100858806B1 (en) * 2002-09-04 2008-09-17 삼성에스디아이 주식회사 Battery
KR100646520B1 (en) * 2005-03-09 2006-11-14 삼성에스디아이 주식회사 secondary battery and method for assembling the same

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