JP2004014173A - Battery and manufacturing method for battery - Google Patents

Battery and manufacturing method for battery Download PDF

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Publication number
JP2004014173A
JP2004014173A JP2002162767A JP2002162767A JP2004014173A JP 2004014173 A JP2004014173 A JP 2004014173A JP 2002162767 A JP2002162767 A JP 2002162767A JP 2002162767 A JP2002162767 A JP 2002162767A JP 2004014173 A JP2004014173 A JP 2004014173A
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rivet
terminal
hole
battery
insulating sealing
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JP2004014173A5 (en
JP4304919B2 (en
Inventor
Takeshi Shimozono
下薗　　武司
Kuniyoshi Munenaga
胸永　　訓良
Hiroshi Tasai
田才　　博志
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Japan Storage Battery Co Ltd
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Japan Storage Battery Co 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)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery in which a rivet terminal and a current collecting connector are firmly connected and the contact resistance value is reduced. <P>SOLUTION: The battery comprises: an insulation sealing material disposed on both inner and outer peripheral parts of an opening hole formed in a battery outer package and having a through hole; a current collecting connector disposed over the inner-side insulation sealing material and having a protrusion hanging down along terminal holes; and a rivet terminal having a rivet part projecting from a flange, the rivet part 7b passing through the through holes of the inner and outer insulation sealing materials 2, 4 and a rivet terminal hole of the current collecting connector from outside of the battery outer package. The rivet part 7a is caulked to press the protrusion 2d, and the rivet part 7a and the protrusion 2d are welded to each other. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は電池とその製造方法に関する。
【０００２】
【従来の技術】
電気自動車等に用いられる大型の非水電解質二次電池の構成例を図３に示す。この非水電解質二次電池は、長円筒形の巻回型の発電要素１を４個密着して並べ並列接続したものである。これらの発電要素１は、両端面部に配置された集電接続体２にそれぞれ正負の電極が接続固定されて並列接続されている。集電接続体２は、正極側の場合にはアルミニウム板、負極側の場合には銅板からなり、水平に配置されたほぼ二等辺三角形の板状の本体２ａの底辺部から下方に向けて櫛状に突出した複数本の接続部２ｂに、発電要素１の正極又は負極が接続固定されている。これらの集電接続体２の本体２ａは、それぞれ内部絶縁封止板３を介して蓋板４の裏面の両端部に配置される。内部絶縁封止板３は、絶縁性の樹脂等からなる、集電接続体２の本体２ａよりも一回り大きい二等辺三角形の板材であり、裏面側の周囲を下方に突出させた内側にこの集電接続体２の本体２ａが嵌まり込むようになっている。蓋板４は、矩形のステンレス鋼板からなり、４個の発電要素１を収納するステンレス製の容器である電池筐体５の上端開口部に嵌め込まれて溶接により固着されるようになっていて、これら蓋板４と電池筐体５が非水電解質二次電池の電池外装体を構成する。
【０００３】
上記蓋板４の上面の両端部には、それぞれ外部絶縁封止板６を介してリベット端子７が配置されている。リベット端子７は、正極側の場合にはアルミニウム材、負極側の場合には銅材からなり、正方形状の四隅を面取りした形状の鍔部７ａの下面から筒状のリベット部７ｂを突出させると共に、この鍔部７ａの上面から筒状の端子部７ｃを突出させたものである。リベット部７ｂと端子部７ｃを筒状としているのは、かしめを容易にするためであり、これら筒状の内穴はそれぞれ鍔部７ａには達しない深さまでしか形成されず、互いに貫通はしていない。また、これらリベット部７ｂと端子部７ｃは、筒状ではなく円柱状の中実体であってもよい。外部絶縁封止板６は、絶縁性の樹脂等からなる矩形の厚手の板材であり、上面の一端側にはほぼ正方形状の四角凹部６ａが形成されると共に、他端側には正六角形状の六角凹部６ｂが形成されている。また、四角凹部６ａの底面の中央部には、裏面に貫通する貫通孔６ｃが形成されている。この貫通孔６ｃの内径は、リベット端子７のリベット部７ｂが嵌合する程度の大きさを有するが、外部絶縁封止板６の下面は、貫通孔６ｃの開口部の縁が下方に向けて蓋板４の板厚よりも少し長く筒状に突出している。そして、この蓋板４にも、上面の両端部に配置される外部絶縁封止板６の貫通孔６ｃに対応する位置に、それぞれこの貫通孔６ｃの下端部の筒状の突設体の外径が嵌合する大きさの開口孔４ａが形成されている。また、この蓋板４の下面の両端部に配置される内部絶縁封止板３と集電接続体２の本体２ａにも、開口孔４ａに対応する位置に貫通孔３ａと端子孔２ｃが形成されている。内部絶縁封止板３の貫通孔３ａは、蓋板４の開口孔４ａと同様の大きさの孔であるが、集電接続体２の端子孔２ｃは、リベット端子７のリベット部７ｂの外径が嵌合する大きさの孔である。
【０００４】
上記外部絶縁封止板６は、図３に示すように、六角凹部６ｂに端子ボルト８の頭部が嵌入されると共に、上面に端子台９が配置される。これら端子ボルト８や端子台９も、正極側の場合にはアルミニウム材、負極側の場合には銅材からなる。端子ボルト８は、六角形状の頭部の上面から上方に向けてボルト部を突設した六角ボルト状のものである。端子台９は、外部絶縁封止板６よりも小さい矩形の板状であり、一端側に形成されたカシメ孔９ａにリベット端子７の端子部７ｃを嵌入させると共に、他端側に形成された貫通孔９ｂに端子ボルト８のボルト部を貫通させる。そこで、端子台９のカシメ孔９ａから突出した端子部７ｃの先端部をかしめることにより、リベット端子７と端子台９とを接続固定すると共に、端子ボルト８を端子台９に係止している。この端子ボルト８は、端子台９には直接固定されていないが、六角形の頭部が外部絶縁封止板６の六角凹部６ｂに嵌まり込むことにより回り止めされ、端子台９によって抜け止めされている。そして、この端子ボルト８のボルト部に電源コードの圧着端子等を嵌めてナット等で螺着することにより、端子台９とこの圧着端子等との接続固定を行うことができ、これによりリベット端子７と外部の電源コード等との配線接続を行うことができる。
【０００５】
なお、図３では、集電接続体２の接続部２ｂに発電要素１を接続固定してからリベット端子７のリベット部７ｂや端子部７ｃのかしめが行われるように示されているが、実際には、これらのかしめが行われてから発電要素１の接続固定が行われる。
【０００６】
【発明が解決しようとする課題】
ところが、リベット端子をかしめするのみでは、リベット端子７と集電接続体２との接続は完全に密着していないので、離脱する可能性があること、およびかかる部分の接続は接触のみであるため内部抵抗値が高くなるという問題があった。
【０００７】
本発明は、かかる事情に対処するためになされたものであり、リベット端子と集電接続体との接続が強固かつ接触抵抗値が低減化された電池を得ることを目的としている。
【０００８】
【課題を解決するための手段】
請求項１記載の発明は、電池外装体に形成された開口孔の内外両周縁部に配された絶縁封止材材であって貫通孔を有するものと、内側の絶縁封止材材に重ねて配された集電接続体であって端子孔と端子孔に沿って垂下する突設体とを有するものと、鍔部から突設したリベット部を有する端子であって、リベット部が電池外装体外側から内外の絶縁封止材材の貫通孔と電池外装体の開口孔と集電接続体の端子孔とを貫通するものとを備え、リベット部の先端部が突設体を押圧するようかしめられているとともにリベット部と突設体とが溶接されたことを特徴とする電池である。
【０００９】
この発明によれば、端子のリベット部が集電接続体の端子孔に沿って垂下する突設体とともにかしめられているので、従来のようにリベット部が直接集電接続体面にかしめられていたものに比べ、接続が強度になるとともに、リベット部と集電接続体とが溶接されるので、かかる部分が離脱することがなくなるとともに、内部抵抗値が低減化された電池を得ることが可能となる。
【００１０】
請求項２記載の発明は、突設体の根元に凹部が形成されたことを特徴とする前記電池である。この発明によれば、リベット部をかしめて突設体を押圧するに際し、リベット部のかしめ作業がし易くなる。
【００１１】
請求項３の発明は、鍔部から突設したリベット部を有する端子のリベット部を電池外装体外側から内外の絶縁封止材材の貫通孔と電池外装体の開口孔と集電接続体の端子孔とに貫通させ、リベット部と突設体とを溶接した後、リベット部の先端部をかしめることを特徴とする、請求項１又は２記載の電池の製造方法である。この発明によれば、リベット部と突設体とが溶接されているので、かしめ作業のため、鍔部から突設したリベット部を有する端子のリベット部を電池外装体外側から内外の絶縁封止材材の貫通孔と電池外装体の開口孔と集電接続体の端子孔とに貫通させたものを倒置しても、端子が脱落することがなく、かしめ作業が容易に行える。
【００１２】
請求項４記載の発明は、鍔部から突設したリベット部を有する端子のリベット部を電池外装体外側から内外の絶縁封止材材の貫通孔と電池外装体の開口孔と集電接続体の端子孔とに貫通させ、リベット部の先端部をかしめた後、リベット部と突設体とを溶接することを特徴とする、請求項１又は２記載の電池の製造方法である。この発明によれば、リベット部と突設体とをより確実に溶接することができる。
【００１３】
【発明の実施の形態】
以下、本発明の実施形態について図面を参照して説明する。
【００１４】
図１〜図２は本発明の一実施形態を示すものである。図１は、鍔部７ａから突設したリベット部７ｂが電池外装体外側から内外の絶縁封止材材４、２の貫通孔と電池外装体の開口孔と集電接続体２の端子孔及び突設体とを貫通するよう配された状態を示す模式断面図であり、図２は、リベット部７ｂの先端部が突設体２ｄを押圧するようかしめられているとともに、リベット部と突設体とが溶接部１０で一体化された状態を示す模式断面図である。
【００１５】
本実施形態は、従来例と同様に電気自動車等に用いられる大型の非水電解質二次電池について説明する。　図１は、かしめのために、図３に示す蓋板４を上下逆にした状態を示しているので、内部絶縁封止板３はこの蓋板４の上側に配置され、外部絶縁封止板６はこの蓋板４の下側に配置されている。外部絶縁封止板６は、貫通孔６ｃの開口部の縁から突出した筒状の突設体６ａを下方から蓋板４の開口孔４ａに嵌入させて配置される。また、内部絶縁封止板３は、貫通孔３ａが蓋板４の開口孔４ａに重なるようにして上側に配置される。この際、内部絶縁封止板３の貫通孔３ａには、蓋板４の開口孔４ａに嵌入された外部絶縁封止板６の突設体の先端部が嵌入されることになる。さらに、集電接続体２の本体２ａは、端子孔２ｃが蓋板４の開口孔４ａに重なるようにして内部絶縁封止板３の上側に配置される。そして、リベット端子７は、下方からリベット部７ｂを外部絶縁封止板６の貫通孔６ｃに嵌入させると共に、鍔部７ａを四角凹部６ａに嵌入させて配置される。この際、リベット端子７のリベット部７ｂは、外部絶縁封止板６の貫通孔６ｃを通ることにより、蓋板４の開口孔４ａや内部絶縁封止板３の貫通孔３ａを貫通する。そして、このリベット部７ｂは、集電接続体２の本体２ａの端子孔２ｃをも貫通して、先端部がこの端子孔２ｃから上方に突出することになる。
【００１６】
上記集電接続体２には、図１に示すように、端子孔２ｃに沿って垂下する（図１では図面上方に立設した状態でしめされている）環状の突設体２ｂが設けられており、この突設体２ｄの根元には欠切部２ｅを備えている。欠切部２ｅを備えることによって、かしめ加工を容易におこなうことが可能となる。
【００１７】
上記リベット端子７は、端子部７ｃや鍔部７ａを下方から支持するように治具上（図示せず）に載置される。また、集電接続体２の本体２ａは、リング状の押圧治具（図示せず）によって上方から押圧される。押圧治具は、リング状の中央の開口部に本体２ａの端子孔２ｃの開口縁部が露出しリベット端子７のリベット部７ｂが突出できるようになっている。従って、この押圧治具は、集電接続体２の本体２ａと内部絶縁封止板３とを蓋板４側に圧迫する。また、蓋板４は、外部絶縁封止板６とリベット端子７とを介して下方から支持される。
【００１８】
以上のように配置した各部品を、上記リベット端子７のリベット部７ｂと、集電接続体に設けられた突設体７ｄとをかしめる。かしめはかしめ機のヘッドで押圧することによりおこなわれる。かしめ機のヘッドは、押圧治具の中央の開口部を通して、リベット部７ｂの先端部まで下降することができる。そして、このリベット部７ｂの突設体２ｄの先端部を下方に圧迫しながら、集電接続体２の本体２ａにおける端子孔２ｃの上端側の開口縁部上に押し広げることによりリベット部７ｂがかしめられる。
【００１９】
この際、リベット端子７のリベット部７ｂの先端部は、鍔部７ａとの間に、集電接続体２の本体２ａと内部絶縁封止板３と蓋板４と外部絶縁封止板６とを挟持してこれらを押圧させることにより、樹脂からなる内部絶縁封止板３と外部絶縁封止板６を圧迫して、リベット端子７を貫通させた状態で、蓋板４の開口孔４ａを封止する。また、リベット端子７と集電接続体に設けられた突設体は、内部絶縁封止板３と外部絶縁封止板６とを介して蓋板４に絶縁した状態で固定されると共に、集電接続体２の本体２ａに接続固定される。しかるのち、かかる部分を溶接する。この状態を図２に示す。溶接させる方法としてはレーザー溶接法が好ましい。
【００２０】
上記かしめ工程によって蓋板４にリベット端子７と集電接続体２が取り付けられると、図３に示した端子ボルト８や端子台９の取り付けを行い、集電接続体２の接続部２ｂに発電要素１を取り付けてから、これらの発電要素１を電池筐体５に収納すると共に、この電池筐体５の上端開口部に蓋板４を嵌め込んで溶接により固着される。非水電解質二次電池を上記の通り製造すれば、リベット端子と集電接続体をかしめした後、溶接することによって、内部抵抗値の低減下を図り、製造した電池の特性値が均一である電池を提供することが可能である。
【００２１】
以上とは逆に、予めリベット部７ｂと集電接続体に設けられた突設体７ｄとを溶接しておき、しかるのちリベット部７ｂをかしめてもよい。図４は、鍔部７ａから突設したリベット部７ｂが電池外装体外側から内外の絶縁封止材材４、２の貫通孔と電池外装体の開口孔と集電接続体２の端子孔及び突設体とを貫通するよう配されるとともに、リベット部７ｂと集電接続体に設けられた突設体７とが溶接部１０で溶接された状態を示す模式断面図である。この図ではリベット部７ｂと突設体７の境界線部全周に渡って溶接されているが、一部分であってもよい。こののち、リベット部７ｂをかしめて図２の状態にすることができる。この方法によれば、リベット端子と集電接続体を溶接した後かしめすることによって、かかる部分が離脱することがなくなるとともに、内部抵抗値が低減化された電池を得ることが可能となる。さらに、集電接続体の端子孔に沿って突設された突設体の根元に、欠切部を備えることによって、かしめ加工を容易なものにすることが可能となる。
【００２２】
上記各部品の材質は上記実施形態で示したものに限定されない。さらに上記実施形態では、非水電解質二次電池について説明したが、本発明は電池の種類も限定されない。
【００２３】
【発明の効果】
以上の説明から明らかなように、従来では端子部と集電接続体の接続は接触のみであったが、本発明ではリベット端子と集電接続体との固定がより強固になるとともに、両者が溶接されるので、かかる部分が離脱することがなくなるとともに、内部抵抗値が低減化された電池を得ることが可能となる。さらに、集電接続体の端子孔に沿って突設された突設体の根元に、欠切部を備えることによって、かしめ加工を容易なものにすることが可能となる。これにより、電池特性が均一な電池を製造することが可能となり、電池の信頼性を長期間確保することが可能となる。
【図面の簡単な説明】
【図１】本発明の一実施形態を示す図である。
【図２】本発明の一実施形態を示す図である。
【図３】非水電解質二次電池の構造を説明するための分解斜視図である。
【図４】本発明の一実施形態を示す図である。
【符号の説明】
１　　発電要素
２　　集電接続体
２ａ　本体
２ｃ　端子孔
２ｄ　突設体
２ｅ　欠切部
３　　内部絶縁封止板
４　　蓋板
６　　外部絶縁封止板
７　　リベット端子
７ｂ　リベット部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a battery and a method for manufacturing the battery.
[0002]
[Prior art]
FIG. 3 shows a configuration example of a large non-aqueous electrolyte secondary battery used for an electric vehicle or the like. This non-aqueous electrolyte secondary battery is a battery in which four long cylindrical wound power generating elements 1 are closely arranged and connected in parallel. Positive and negative electrodes of these power generating elements 1 are connected and fixed to current collecting connectors 2 arranged on both end faces, respectively, and are connected in parallel. The current collection connector 2 is made of an aluminum plate on the positive electrode side and a copper plate on the negative electrode side, and is combed downward from the bottom of a horizontally arranged isosceles triangular plate-shaped main body 2a. The positive electrode or the negative electrode of the power generation element 1 is connected and fixed to the plurality of connection portions 2b protruding in a shape. The main bodies 2a of the current collectors 2 are disposed at both ends of the back surface of the cover plate 4 via the internal insulating sealing plate 3, respectively. The internal insulating sealing plate 3 is an isosceles triangular plate material, which is made of an insulating resin or the like and is slightly larger than the main body 2 a of the current collector 2, and is provided on the inside protruding downward on the back surface side. The main body 2a of the current collector 2 is fitted. The cover plate 4 is made of a rectangular stainless steel plate, is fitted into an upper end opening of a battery case 5 which is a stainless steel container that stores the four power generating elements 1, and is fixed by welding. The cover plate 4 and the battery housing 5 constitute a battery outer package of the non-aqueous electrolyte secondary battery.
[0003]
Rivet terminals 7 are arranged at both ends of the upper surface of the cover plate 4 via external insulating sealing plates 6 respectively. The rivet terminal 7 is made of an aluminum material on the positive electrode side, and made of a copper material on the negative electrode side. The rivet terminal 7 projects a cylindrical rivet portion 7b from the lower surface of the flange portion 7a having four corners of a square shape. A cylindrical terminal portion 7c protrudes from the upper surface of the flange portion 7a. The reason why the rivet portion 7b and the terminal portion 7c are cylindrical is to facilitate caulking, and these cylindrical inner holes are formed only to a depth that does not reach the flange portion 7a. Not. Also, the rivet portion 7b and the terminal portion 7c may be cylindrical solid bodies instead of cylindrical ones. The outer insulating sealing plate 6 is a rectangular thick plate made of an insulating resin or the like, and has a substantially square-shaped square recess 6a formed at one end of the upper surface and a regular hexagonal shape formed at the other end. Hex recess 6b is formed. At the center of the bottom surface of the square recess 6a, a through hole 6c penetrating the back surface is formed. The inner diameter of the through hole 6c is large enough to fit the rivet portion 7b of the rivet terminal 7, but the lower surface of the external insulating sealing plate 6 has the edge of the opening of the through hole 6c facing downward. It protrudes in a tubular shape slightly longer than the plate thickness of the lid plate 4. The lid plate 4 is also provided at positions corresponding to the through holes 6c of the external insulating sealing plate 6 disposed at both ends of the upper surface with the outer ends of the cylindrical projecting members at the lower ends of the through holes 6c. An opening hole 4a having a size to fit the diameter is formed. Also, the through holes 3a and the terminal holes 2c are formed at positions corresponding to the opening holes 4a in the internal insulating sealing plate 3 and the main body 2a of the current collecting connector 2 disposed at both ends of the lower surface of the lid plate 4. Have been. The through hole 3a of the internal insulating sealing plate 3 is a hole having the same size as the opening hole 4a of the cover plate 4, but the terminal hole 2c of the current collector 2 is located outside the rivet portion 7b of the rivet terminal 7. It is a hole whose size fits.
[0004]
As shown in FIG. 3, the head of the terminal bolt 8 is fitted into the hexagonal recess 6b, and the terminal block 9 is arranged on the upper surface of the external insulating sealing plate 6 as shown in FIG. The terminal bolts 8 and the terminal blocks 9 are also made of an aluminum material on the positive electrode side and made of a copper material on the negative electrode side. The terminal bolt 8 is a hexagonal bolt having a bolt protruding upward from the upper surface of the hexagonal head. The terminal block 9 has a rectangular plate shape smaller than the external insulating sealing plate 6, and has a terminal portion 7 c of the rivet terminal 7 fitted into a caulking hole 9 a formed on one end side, and is formed on the other end side. The bolt portion of the terminal bolt 8 is passed through the through hole 9b. Therefore, by caulking the end of the terminal portion 7c protruding from the caulking hole 9a of the terminal block 9, the rivet terminal 7 and the terminal block 9 are connected and fixed, and the terminal bolt 8 is locked to the terminal block 9 by locking. I have. Although the terminal bolt 8 is not directly fixed to the terminal block 9, it is prevented from rotating by the hexagonal head being fitted into the hexagonal recess 6 b of the external insulating sealing plate 6, and is prevented from falling off by the terminal block 9. Have been. Then, a crimp terminal of a power cord is fitted to the bolt portion of the terminal bolt 8 and screwed with a nut or the like, thereby connecting and fixing the terminal block 9 and the crimp terminal. 7 can be connected to an external power cord or the like.
[0005]
Although FIG. 3 shows that the power generation element 1 is connected and fixed to the connection portion 2b of the current collection connector 2, the rivet portion 7b and the terminal portion 7c of the rivet terminal 7 are caulked. After the caulking is performed, the connection and fixing of the power generating element 1 are performed.
[0006]
[Problems to be solved by the invention]
However, if only the rivet terminal is swaged, the connection between the rivet terminal 7 and the current collecting connector 2 is not completely in close contact with each other, and there is a possibility that the rivet terminal 7 may be detached. There is a problem that the internal resistance value becomes high.
[0007]
The present invention has been made in order to cope with such a situation, and an object of the present invention is to obtain a battery in which a connection between a rivet terminal and a current collector is strong and a contact resistance value is reduced.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is characterized in that the insulating sealing material disposed on the inner and outer peripheral edges of the opening formed in the battery exterior body and having a through hole and the inner insulating sealing material are overlapped. A terminal having a terminal hole and a projecting body hanging down along the terminal hole, and a terminal having a rivet portion protruding from a flange portion, wherein the rivet portion is a battery exterior. A through hole of the inner and outer insulating sealing material from the outside of the body, an opening of the battery exterior body, and a terminal through the terminal hole of the current collector, so that the tip of the rivet portion presses the projecting body. A battery which is caulked and has a rivet portion and a projecting body welded to each other.
[0009]
According to the present invention, since the rivet portion of the terminal is caulked together with the projecting body hanging down along the terminal hole of the current collecting connector, the rivet portion is directly caulked to the surface of the current collecting connector as in the related art. Compared to those, the connection becomes stronger and the rivet part and the current collector are welded, so that such a part does not come off, and it is possible to obtain a battery with a reduced internal resistance value. Become.
[0010]
The invention according to claim 2 is the battery, wherein a recess is formed at a root of the protruding body. ADVANTAGE OF THE INVENTION According to this invention, when crimping a rivet part and pressing a projecting body, it becomes easy to crimp the rivet part.
[0011]
According to a third aspect of the present invention, the rivet portion of the terminal having the rivet portion protruding from the flange portion is connected to the through hole of the insulating sealing material from the outside to the inside and outside of the battery exterior body, the opening of the battery exterior body, and the current collector connector. 3. The method for manufacturing a battery according to claim 1, wherein the rivet portion and the protruding body are welded to each other through the terminal hole, and then a tip portion of the rivet portion is caulked. According to the present invention, since the rivet portion and the projecting body are welded, the rivet portion of the terminal having the rivet portion projecting from the flange portion is sealed from the outside of the battery exterior body to the inside and outside for caulking work. Even if the material penetrated through the through-hole of the material, the opening of the battery package, and the terminal hole of the current collector is inverted, the terminal does not fall off, and the caulking operation can be easily performed.
[0012]
According to a fourth aspect of the present invention, the rivet portion of the terminal having the rivet portion protruding from the flange portion is provided with a through-hole of an insulating sealing material from the outside to the inside and outside of the battery exterior body, an opening hole of the battery exterior body, and a current collector. 3. The method for producing a battery according to claim 1, wherein the rivet portion and the projecting body are welded after the tip portion of the rivet portion is swaged through the terminal hole of the battery. According to the present invention, the rivet portion and the protruding body can be welded more reliably.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
1 and 2 show one embodiment of the present invention. FIG. 1 shows that the rivet portion 7b protruding from the flange portion 7a has through holes in the insulating sealing materials 4 and 2 from the outside to the inside and outside of the battery exterior, an opening in the battery exterior, a terminal hole in the current collector 2 and FIG. 2 is a schematic cross-sectional view showing a state in which the rivet portion 7b is disposed so as to penetrate through the projecting body. FIG. FIG. 3 is a schematic cross-sectional view showing a state where a body is integrated at a welded portion 10.
[0015]
In the present embodiment, a large non-aqueous electrolyte secondary battery used for an electric vehicle or the like will be described as in the conventional example. FIG. 1 shows a state in which the cover plate 4 shown in FIG. 3 is turned upside down for caulking, so that the internal insulating sealing plate 3 is disposed above the cover plate 4 and the external insulating sealing plate Reference numeral 6 is arranged below the cover plate 4. The outer insulating sealing plate 6 is arranged by fitting a cylindrical projecting body 6a projecting from an edge of the opening of the through hole 6c into the opening 4a of the cover plate 4 from below. The internal insulating sealing plate 3 is disposed on the upper side such that the through-hole 3a overlaps the opening 4a of the cover plate 4. At this time, the tip of the protruding body of the outer insulating sealing plate 6 fitted into the opening 4a of the cover plate 4 is fitted into the through hole 3a of the inner insulating sealing plate 3. Further, the main body 2 a of the current collector 2 is arranged above the inner insulating sealing plate 3 such that the terminal holes 2 c overlap the opening holes 4 a of the cover plate 4. The rivet terminal 7 is arranged such that the rivet portion 7b is fitted into the through hole 6c of the external insulating sealing plate 6 from below, and the flange portion 7a is fitted into the square recess 6a. At this time, the rivet portion 7b of the rivet terminal 7 passes through the opening 4a of the cover plate 4 and the through hole 3a of the internal insulating sealing plate 3 by passing through the through hole 6c of the external insulating sealing plate 6. Then, the rivet portion 7b also penetrates the terminal hole 2c of the main body 2a of the current collector 2 so that the tip portion protrudes upward from the terminal hole 2c.
[0016]
As shown in FIG. 1, the current collecting connector 2 is provided with an annular protruding member 2b which hangs down along the terminal hole 2c (shown in FIG. 1 as being erected upward in the drawing). The protrusion 2d has a notch 2e at the base. The provision of the notch 2e makes it possible to easily perform the caulking process.
[0017]
The rivet terminal 7 is mounted on a jig (not shown) so as to support the terminal portion 7c and the flange portion 7a from below. The main body 2a of the current collector 2 is pressed from above by a ring-shaped pressing jig (not shown). In the pressing jig, an opening edge of the terminal hole 2c of the main body 2a is exposed at a ring-shaped central opening, so that the rivet portion 7b of the rivet terminal 7 can protrude. Therefore, the pressing jig presses the main body 2 a of the current collector 2 and the inner insulating sealing plate 3 toward the lid plate 4. Further, the cover plate 4 is supported from below through the external insulating sealing plate 6 and the rivet terminals 7.
[0018]
Each component arranged as described above is swaged with the rivet portion 7b of the rivet terminal 7 and the protruding body 7d provided on the current collector. Caulking is performed by pressing with the head of a caulking machine. The head of the caulking machine can be lowered to the tip of the rivet part 7b through the central opening of the pressing jig. The rivet portion 7b is pushed over the opening edge on the upper end side of the terminal hole 2c in the main body 2a of the current collector 2 while pressing the tip of the projecting body 2d of the rivet portion 7b downward. Caulked.
[0019]
At this time, the tip of the rivet portion 7b of the rivet terminal 7 is located between the main body 2a of the current collecting connector 2, the inner insulating sealing plate 3, the cover plate 4, the outer insulating sealing plate 6, and the flange portion 7a. Are pressed to press the inner insulating sealing plate 3 made of resin and the outer insulating sealing plate 6, and with the rivet terminal 7 penetrated, the opening hole 4 a of the lid plate 4 is closed. Seal. In addition, the rivet terminal 7 and the protruding body provided on the current collecting connector are fixed to the cover plate 4 in an insulated state via the inner insulating sealing plate 3 and the outer insulating sealing plate 6, and are also collected. It is connected and fixed to the main body 2a of the electrical connection body 2. Thereafter, such a portion is welded. This state is shown in FIG. As a welding method, a laser welding method is preferable.
[0020]
When the rivet terminal 7 and the current collecting connector 2 are attached to the cover plate 4 by the above caulking process, the terminal bolts 8 and the terminal blocks 9 shown in FIG. After the elements 1 are attached, these power generating elements 1 are housed in the battery case 5, and the cover plate 4 is fitted into the upper end opening of the battery case 5 and fixed by welding. If the non-aqueous electrolyte secondary battery is manufactured as described above, after caulking the rivet terminal and the current collector, welding is performed to reduce the internal resistance value, and the characteristic value of the manufactured battery is uniform. It is possible to provide a battery.
[0021]
Conversely, the rivet portion 7b may be welded in advance to the projecting body 7d provided on the current collector and then the rivet portion 7b may be swaged. FIG. 4 shows that the rivet portion 7b protruding from the flange portion 7a has through holes in the insulating sealing materials 4 and 2 from the outside to the inside and outside of the battery exterior body, an opening hole in the battery exterior body, a terminal hole in the current collector connector 2, and FIG. 4 is a schematic cross-sectional view showing a state in which the rivet portion 7b and the projecting member 7 provided on the current collecting connector are welded at a welding portion 10 while being arranged to penetrate the projecting member. In this figure, the rivet 7b and the projecting body 7 are welded all around the boundary line, but may be partly welded. Thereafter, the rivet portion 7b can be swaged to the state shown in FIG. According to this method, by caulking after welding the rivet terminal and the current collector, it is possible to obtain a battery in which such a portion does not come off and the internal resistance value is reduced. Furthermore, by providing a notch at the base of the protruding body protruding along the terminal hole of the current collecting connector, it becomes possible to easily perform caulking.
[0022]
The material of each component is not limited to those shown in the above embodiment. Further, in the above embodiment, the non-aqueous electrolyte secondary battery has been described, but the present invention is not limited to the type of battery.
[0023]
【The invention's effect】
As is clear from the above description, in the related art, the connection between the terminal portion and the current collecting connector was only contact, but in the present invention, the fixing of the rivet terminal and the current collecting connector becomes stronger, and both are fixed. Since the welding is performed, such a portion does not separate and a battery having a reduced internal resistance value can be obtained. Furthermore, by providing a notch at the base of the protruding body protruding along the terminal hole of the current collecting connector, it becomes possible to easily perform caulking. As a result, it is possible to manufacture a battery having uniform battery characteristics, and it is possible to secure the reliability of the battery for a long period of time.
[Brief description of the drawings]
FIG. 1 is a diagram showing one embodiment of the present invention.
FIG. 2 is a diagram showing one embodiment of the present invention.
FIG. 3 is an exploded perspective view illustrating a structure of a non-aqueous electrolyte secondary battery.
FIG. 4 is a diagram showing one embodiment of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 power generating element 2 current collecting connector 2a main body 2c terminal hole 2d projecting body 2e cutout 3 internal insulating sealing plate 4 cover plate 6 external insulating sealing plate 7 rivet terminal 7b rivet portion

Claims (4)

電池外装体に形成された開口孔の内外両周縁部に配された絶縁材封止材であって貫通孔を有するものと、
内側の絶縁封止材に重ねて配された集電接続体であって、端子孔と端子孔に沿って垂下する突設体とを有するものと、
鍔部から突設したリベット部を有するリベット端子であって、リベット部が電池外装体外側から内外の絶縁封止材材の貫通孔と電池外装体の開口孔と集電接続体のリベット端子孔とを貫通するものとを備え、
リベット部が突設体を押圧するようかしめられているとともに、リベット部と突設体とが溶接されたことを特徴とする電池。Insulating material sealing material disposed on both the inner and outer peripheral portions of the opening hole formed in the battery exterior body and having a through hole,
A current collecting connector disposed on the inner insulating sealing material and having a terminal hole and a protruding body depending along the terminal hole,
A rivet terminal having a rivet portion protruding from a flange portion, wherein the rivet portion is a through hole of an insulating sealing material from the outside to the inside and outside of the battery exterior body, an opening hole of the battery exterior body, and a rivet terminal hole of a current collector. And one that penetrates,
A battery characterized in that the rivet portion is caulked to press the projecting body and the rivet portion and the projecting body are welded. 突設体の根元に凹部が形成されたことを特徴とする、請求項１記載の電池。2. The battery according to claim 1, wherein a recess is formed at the base of the protruding body. リベット端子のリベット部を電池外装体外側から内外の絶縁封止材材の貫通孔と電池外装体の開口孔と集電接続体のリベット端子孔とに貫通させ、リベット部と突設体とを溶接した後、リベット部をかしめることを特徴とする、請求項１又は２記載の電池の製造方法。The rivet part of the rivet terminal is passed from the outside of the battery exterior body to the through hole of the inside and outside insulating sealing material, the opening hole of the battery exterior body, and the rivet terminal hole of the current collector, and the rivet part and the protrusion are formed. 3. The method according to claim 1, wherein the rivet portion is caulked after welding. リベット端子のリベット部を電池外装体外側から内外の絶縁封止材材の貫通孔と電池外装体の開口孔と集電接続体のリベット端子孔とに貫通させ、リベット部をかしめた後、リベット部と突設体とを溶接することを特徴とする、請求項１又は２記載の電池の製造方法。The rivet part of the rivet terminal is passed from the outside of the battery exterior body to the through hole of the inner and outer insulating sealing material, the opening hole of the battery exterior body, and the rivet terminal hole of the current collector, and after the rivet part is swaged, the rivet is riveted. The method according to claim 1, wherein the portion and the protruding body are welded.
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