JP4171873B2 - Battery connection structure and connection method - Google Patents

Battery connection structure and connection method Download PDF

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JP4171873B2
JP4171873B2 JP2002048164A JP2002048164A JP4171873B2 JP 4171873 B2 JP4171873 B2 JP 4171873B2 JP 2002048164 A JP2002048164 A JP 2002048164A JP 2002048164 A JP2002048164 A JP 2002048164A JP 4171873 B2 JP4171873 B2 JP 4171873B2
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battery
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axis
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JP2003249207A (en
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利幸 板橋
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Toyota Motor Corp
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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
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    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Description

【０００１】
【発明の属する技術分野】
本発明は、電池の接続構造及び接続方法に関し、特に、隣接して配置される電池間の端子を電気的に接続させる際の電池の接続構造及び接続方法に関する。
【０００２】
【従来の技術】
一般に、リチウムイオン電池は、端子電圧が３．６〜３．８Ｖであるので、複数のリチウムイオン電池を直列に接続して所望の電圧を得ることが行われている。この場合、図８に示すように、予め各端子３，４の端部に雄ねじを設けておいて、該雄ねじに螺合したナット１１で導電性材料からなるバスバー１２を各端子３，４に締結して、接続する各端子３，４間にバスバー１２を架設することが従来から行われていた。また、図９に示すように、予め各端子３，４に当該各端子３，４と同軸の雌ねじを設けておいて、該雌ねじに螺合したボルト１３で導電性材料からなるバスバー１２を各端子３，４に締結して、接続する各端子３，４間にバスバー１２を架設することが従来から行われていた。また、図１０に示すように、端面に雌ねじが設けられた一対のボス１４を電池ホルダ１５に立設し、接続させる各端子３，４をボス対の軸平面上に配置し、各ボス１４の端面に螺合したボルト１３でバスバー１２が付設されたエンドプレート１６を各ボス１４に架設する。これにより、バスバー１２を各端子３，４に押圧させ、各端子３，４を電気的に接続することが従来から行われていた。
【０００３】
前者従来例の、端子に雄ねじ又は雌ねじを設け、ナット１１又はボルト１３を用いて、各端子３，４間にバスバー１２を架設して当該各端子３，４を接続させるものでは、部品点数及び組み付け工数が増大し、製造コストが増加する。さらに、ナット１１又はボルト１３の締付け時に、各端子３，４に軸線回りの締付トルクが作用し、各端子３，４が回転することにより内部電極（図示せず）との接合部が破損する虞がある。また、後者従来例の、エンドプレート１６に設けたバスバー１２を接続させる各端子３，４に押圧し、当該各端子３，４を電気的に接続するものでは、各端子３，４に前者のような締付トルクが作用しないため、各端子３，４と内部電極との接合部が捩れて破損するようなことはない。しかしながら、各端子３，４等の寸法のばらつきが大きい場合、各端子３，４とバスバー１２との接触状態が不安定になり、内部抵抗が大きくなる虞がある。
【０００４】
そこで、実開昭６３−１５５６８号公報には、Ｕ字状に形成した板状端子を備え、板状端子間接続動体を端子で弾性反撥力により圧迫挟持して、端子間が電気的に接続可能な鉛蓄電池が開示されている。この鉛蓄電池では、端子間を接続するナット又はボルトが不要となり部品点数が増大するようなことがなく、また、組付けも容易であるであるため、製造コストの増加を抑制することが可能となる。また、特開平４−１７４９６６号公報には、板金加工して一体に形成された断面が略Ｕ字状のバッテリー間端子接続体のＵ字溝を、接続する端子の双方に嵌め込んでバッテリー間端子を接続するバッテリー間端子接続体及びバッテリー集合体が開示されている。このバッテリー間端子接続体及びバッテリー集合体では、Ｕ字状に形成されたバッテリー間端子接続体のばね力で端子を挟持し、端子間の導電性を確実に保持するようにしている。
【０００５】
しかしながら、両者（実開昭６３−１５５６８号公報及び特開平４−１７４９６６号公報）は、端子と接続体とがＵ字状に形成した板状の部材のばね力で接触するため、接続と取り外しとを繰り返したり、周囲の環境の影響により上記ばね力が低下すると、端子と接続体との接触状態が一様でなくなり、内部抵抗、即ち端子間電圧にばらつきを生じることとなる。
【０００６】
【発明が解決しようとする課題】
そこで本発明は、上記事情に鑑みてなされたもので、部品点数を削減して製造コストを減少させると共に確実な電池接続を保持することができる電池の接続構造を提供することを第１の目的とする。また、部品点数を削減して製造コストを減少させると共に確実な電池接続を保持することができる電池の接続方法を提供することを第２の目的とする。
【０００７】
【課題を解決するための手段】
上記第１の目的を達成するために、本発明のうち請求項１に記載の発明は、本体部上面に正極側端子と負極側端子の一対が電池配列方向の略中央に左右対称に配設された電池を隣接して配置し、隣接して配置される電池の端子間を接続させる電池の接続構造であって、各端子に設けられて所定のスリット幅で形成される切欠き部と、該各切欠き部に係合可能な係合片が弾性変形可能な連結部を介して両端に配設される接続部材と、を具備し、前記接続部材の両端に配設した各係合片が互いに電池配列方向の軸線回りに捩れ角度をなしており、また、前記各端子の各切欠き部がなす電池配列方向の軸線回りの角度が前記捩れ角度よりも大きく設定されており、前記連結部を前記端子間で捩るように弾性変形させて前記各係合片を前記各端子の各切欠き部に係合することを特徴とする。
【０００８】
請求項２に記載の発明は、請求項１に記載の発明において、前記各切欠き部が、電池配列方向に略平行に設けられると共に、各端子に設けられる前記各切欠き部が、端子端部から端子基部に向けて斜めに、且つ同一方向に設けられ、また、前記連結部が、前記端子間で捩れて弾性変形可能であることを特徴とする。
【０００９】
請求項３に記載の発明は、請求項１に記載の発明において、前記各切欠き部が、電池配列方向に略平行に設けられると共に、各端子に設けられる前記各切欠き部が、端子側部から端子基部に向けて斜めに、且つ同一方向に設けられ、また、前記連結部が、端子間で捩れて弾性変形可能であることを特徴とする。
【００１０】
請求項４に記載の発明は、請求項１または２に記載の発明において、前記各端子の各端面に形成される前記各切欠き部の各スリットが、前記各端子の軸線から所定量オフセットされ、前記各端子の軸線と前記各切欠き部とが前記各端子の内部で交わることを特徴とする。
【００１１】
請求項５に記載の発明は、請求項１、２または４に記載の発明において、前記各スリットのオフセット量が、前記係合片の板厚の２倍以上３倍以下に設定されると共に、前記連結部が、接続される各端子の各軸線と直交する直線となす角度が、５度以上１５度以下に設定されることを特徴とする。
【００１２】
上記第１の目的を達成するために、本発明のうち請求項６に記載の発明は、本体部上面に正極側端子と負極側端子の一対が電池配列方向の略中央に左右対称に配設された電池を隣接して配置し、隣接して配置される電池の端子間を接続させる電池の接続構造であって、各端子に設けられて所定のスリット幅で形成される切欠き部と、該各切欠き部に係合可能な係合片が連結部を介して両端に配設される接続部材と、を具備し、前記各切欠き部が、各端子側部の一側に前記各端子端面と略平行に設けられ、また、前記各係合片が弾性変形可能な曲面で形成されることを特徴とする。
【００１３】
上記第２の目的を達成するために、請求項７に記載の発明は、本体部上面に正極側端子と負極側端子の一対が電池配列方向の略中央に左右対称に配設された電池を隣接して配置し、隣接して配置される電池の端子間を接続する電池の接続方法であって、各端子に所定のスリット幅で形成した切欠き部を設け、該各切欠き部に係合可能な係合片が弾性変形可能な連結部を介して両端に配設される接続部材の各係合片を互いに電池配列方向の軸線回りに捩れ角度をなすように配設し、また、前記各端子の各切欠き部がなす電池配列方向の軸線回りの角度を前記捩れ角度よりも大きく設定して、前記連結部を前記端子間で捩るように弾性変形させて前記各係合片を各切欠き部に係合することを特徴とする。
【００１４】
従って、請求項１に記載の発明では、弾性変形可能な連結部を介して接続部材の両端に配設した各係合片を、連結部を端子間で捩るように弾性変形させて各係合片を各端子の各切欠き部に係合させることにより、各端子間を電気的に接続することができる。
この場合、切欠き部と係合部との間に所要の接触面圧が生じて、端子と接続部材との接触抵抗が軽減し、電池の内部抵抗の増加を抑制することができる。また、接続部材を各端子間に取付ける際に、接続部材の係合片を端子の切欠き部に挿入するのが容易となると共に、取付けられた接続部材の脱落を防ぐことができる。
【００１５】
請求項２に記載の発明では、接続部材の各係合片を各端子の端子端部から端子基部に向けて設けた各切欠き部に係合させることにより、接続部材の連結部が捩られるように弾性変形し、係合片と端子との間に所要の接触面圧を発生させることが可能となり、内部抵抗のばらつきを抑えることができる。
【００１６】
請求項３に記載の発明では、接続部材の各係合片を各端子の端子側部から端子基部に向けて各切欠き部に係合させることにより、接続部材の連結部が捩られるように弾性変形し、係合片と端子との間に所要の接触面圧を発生させることが可能となり、内部抵抗のばらつきを抑えることができる。また、切欠き部を端子端面から端子基部に向けて設ける場合と比較して、接続部材をより低い位置に取付けることが可能となり、電池全体の高さを低く抑えることができる。
【００１７】
請求項４に記載の発明では、切欠き部が形成されたことによる端子の剛性の低下を最小限に抑えることができる。
【００１８】
請求項５記載の発明では、切欠き部が形成されたことによる端子の剛性の低下を最小限に抑えると共に接続部材の破損を防止しながら、接続部材と端子との間の所要の接触面圧を得ることができる。
【００１９】
請求項６記載の発明では、接続部材の各係合片を接続させる端子間の各切欠き部に係合させることにより、曲面で形成された係合片が弾性変形し、係合片と端子との間に所要の接触面圧を発生させることが可能となり、内部抵抗のばらつきを抑えることができる。また、切欠き部を端子端面から端子基部に向けて設ける場合と比較して、接続部材をより低い位置に取付けることが可能となり、電池全体の高さを低く抑えることができる。
【００２０】
請求項７に記載の発明では、接続部材の各係合片を端子間の各切欠き部に係合させることで接続部材の連結部が捩られるように弾性変形し、係合片と端子との間に所要の接触面圧を発生させることが可能となり、内部抵抗のばらつきを抑えることができる。
【００２１】
【発明の実施の形態】
本発明の一実施の形態の電池の接続構造及び接続方法を図１乃至図５に基づいて説明する。なお、以下、同一又は相当部には同一の符号を付与する。図１に示すように、本電池１の接続構造は、互いに隣接して配置した電池１の正極側端子３と負極側端子４とを導電性材料からなる接続部材５で接続するものである。図１乃至図３に示すように、電池１は本体部２がボックス状に形成されており、該本体部２の上面には、正極側端子３と負極側端子４との一対が、当該上面の電池配列方向（図２における紙面視上下方向）の略中央に左右（図３における左右方向）対称に配設されている。
【００２２】
上記各端子３，４は、略円柱状に形成され、各端子端面３ａ，４ａには、当該各端子端面３ａ，４ａから端子基部に向けて斜めに形成した切欠き部６が設けられている。上記切欠き部６は、各端子端面３ａ，４ａに形成されたスリット６ａが、電池配列方向と略平行となるように形成され、各端子端面３ａ，４ａから端子基部に向けて同一角度（図３に示すθ１）で、且つ同一方向に設けられている。これにより、図１に示すように、電池１を、電池配列方向に異なる極性の各端子３，４が対向するように配置することで、互いに接続される各端子３，４間の切欠き部６が、電池配列方向の軸線回りに角度θ２（θ２＝２θ１、図示せず）をなすように構成されている。また、切欠き部６は、図５に示すように、スリット６ａが各端子３，４の軸線位置（図５に示すＣ）からＬだけオフセットされ、当該軸線と各端子３，４の内部で交わるように形成されている。
【００２３】
また、上記接続部材５は、所要の弾性力を有した板状の部材で形成されており、図４に示すように、上記切欠き部６に係合可能な係合片５ａを連結部５ｂで連結した構造になっている。両端の係合片５ａは、各端子３，４の切欠き部６に所定の嵌め合いで嵌合するように厚み（図４に示すＴ）が設定されている。また、接続部材５は、両端の係合片５ａが、フリーの状態（各端子３，４間から取り外された状態）で電池配列方向の軸線回りに捩れ角度θ３（図４参照）だけ捩れるように形成され、連結部５ｂが、接続される各端子３，４の各軸線と直交する直線（図５に示すＣ）に対して平面視でθ４（図５参照）の角度をなしている。
【００２４】
なお、本電池１の接続構造では、連結部５ｂで連結される両係合片５ａがなす電池配列方向の軸線回りの角度θ３が、上記各端子３，４間の両切欠き部６が電池配列方向の軸線回りになす角度θ２よりも小さい角度に設定されている（θ２＞θ３）。また、図５に示す切欠き部６のスリット６ａの、各端子３，４の軸線位置からのオフセット量Ｌが、上記係合片５ａの板厚Ｔの２〜３倍に設定されると共に、上記連結部５ｂで連結される両係合片が、接続される各端子３，４の各軸線と直交する直線Ｃとなす角度θ３が、５〜１５度に設定されている。
【００２５】
次に、本電池の接続構造及び接続方法の作用を説明する。各電池１，１を直列に接続する場合、まず、図１に示すように、異なる極性の各端子３，４が対向して配置されるように各電池１，１を配列する。これにより、接続する各端子３，４間の切欠き部６は、電池配列方向の軸線回りにθ２の角度をなすと共に各端子端面３ａ，４ａのスリット６ａが電池配列方向と直交する方向に２Ｌだけオフセットされた位置関係となる。次に、接続部材５の両端の各係合片５ａを、これら各端子３，４間の各端子端面３ａ，４ａ，のスリット６ａから切欠き部６に挿入し、各係合片５ａと各切欠き部６とを所要の嵌め合いで係合させる。この際、接続部材５は、各端子３，４の軸線間の中心の位置を軸に平面視で時計回りに回転するようにして挿入される。
【００２６】
そして、各端子３，４間に取付けられた接続部材５は、連結部５ｂが各端子３，４間で捩れるように弾性変形し、両端の係合片５ａが電池配列方向の軸線回りになす角度が、θ３からθ２に広がる。これにより、各係合片５ａが、各切欠き部６のスリット６ａ両側の面の下側の面に押圧された状態となり、各切欠き部６と各係合片５ａとの間に所要の接触面圧を発生させることが可能となり、各端子３，４と接続部材５との結合力を高めることができる。また、連結部５ｂが、接続される各端子３，４の各軸線と直交する直線Ｃに対して平面視でθ４（図５参照）の角度をなすことで、各端子３，４間の連結部の捩れ力が大きくなる。これにより、各端子３，４と接続部材５との結合力がより向上し、当該各端子３，４と接続部材５との接触抵抗が軽減され、各電池１，１の内部抵抗の増加を抑制すると共に当該内部抵抗のばらつきを防止することができる。
【００２７】
この実施の形態では以下の効果を奏する。
本電池１の接続構造では、従来の電池の接続構造（図８〜図１０参照）で用いる端子接続用のバスバー１２を取付けるためのナット１１やボルト１３を廃止して、部品点数を削減すると共に組付け工数を削減することが可能となり、製造コストを減少させることができる。また、連結部５ｂを各端子３，４間で捩るように弾性変形させて、両端の各係合片５ａを各端子３，４の切欠き部６に係合させたので、切欠き部６と係合片５ａとの間に所要の接触面圧を発生させることが可能となり、各端子３，４と接続部材５との接触抵抗が軽減され、各電池１，１の内部抵抗の増加を抑制すると共に当該内部抵抗のばらつきを防止することができる。
【００２８】
また、接続部材５の両端に配設された各係合片５ａが電池配列方向の軸線回りに捩れ角度θ３をなして配設され、各端子３，４間の互いの切欠き部６がなす電池配列方向の軸線回りの角度θ２が、上記捩れ角度θ３よりも大きく設定される。従って、切欠き部６と係合片５ａとの間に所要の接触面圧が生じて、各端子３，４と接続部材５との接触抵抗が軽減し、各電池１，１の内部抵抗の増加を抑制することができる。また、接続部材５を各端子３，４間に取付ける際に、接続部材５の各係合片５ａを各端子３，４の切欠き部６に挿入するのが容易となると共に、取付けられた接続部材５の脱落を防ぐことができる。
【００２９】
また、各端子端面３ａ，４ａに形成される切欠き部６のスリット６ａが、各端子３，４の軸線から所定量Ｌだけオフセットされ、該スリット６ａのオフセット量Ｌが、係合片５ａの板厚Ｔの２倍〜３倍に設定されると共に、連結部５ｂが、接続される各端子３，４の各軸線と直交する直線Ｃとなす角度が、５度〜１５度に設定される。従って、切欠き部６が形成されたことによる各端子３，４の剛性の低下を最小限に抑えると共に接続部材５の破損を防止して、且つ接続部材５と各端子３，４との間に所要の接触面圧を発生させることが可能となり、各端子３，４と接合部材との剛性と、当該各端子３，４と接続部材５との結合力とを高いレベルでバランスさせることができる。
【００３０】
なお、実施の形態は上記に限定されるものではなく、例えば次のように構成してもよい。
図６に示すように、切欠き部６を、端子側部から端子基部に向けて斜めに設けてもよい。この場合、切欠き部６を端子端面から端子基部に向けて設けた場合と比較して、接続部材５がより低い位置に取付けられて電池全体の高さを低く抑えることが可能となり、電池１の収納スペースを省スペース化することができる。
また、図７に示すように、切欠き部６を、端子側部の一側に、各端子端面３ａ，４ａと略平行に設け、係合片５ａを、スリット幅方向に弾性変形可能な曲面で形成してもよい。この場合、曲面で形成した各係合片５ａを、切欠き部６で圧縮するように弾性変形させて各端子３，４間の各切欠き部６に係合させることにより、各係合片５ａと各端子３，４との間に所要の接触面圧を発生させることが可能となり、電池１の内部抵抗のばらつきを抑制することができる。また、切欠き部６を各端子端面３ａ，４ａから端子基部に向けて設ける場合と比較して、接続部材５がより低い位置に取付けられて電池全体の高さを低く抑えることが可能となり、電池１の収納スペースを省スペース化することができる。
【００３１】
【発明の効果】
以上詳述したように、本発明によれば、部品点数を削減して製造コストを減少させると共に確実な電池接続を保持することができる電池の接続構造を提供することができる。また、部品点数を削減して製造コストを減少させると共に確実な電池接続を保持することができる電池の接続方法を提供することができる。
【図面の簡単な説明】
【図１】 本実施の形態の電池の接続構造の説明図である。
【図２】 電池単体の平面図である。
【図３】 電池単体の正面図である。
【図４】 接続部材の平面図と正面図である。
【図５】 端子間が接続部材で接続された状態を示す図である。
【図６】 他の実施の形態の電池の接続構造の説明図で、特に、切欠き部が、端子側部から端子基部に向けて設けられた端子を示す図である。
【図７】 他の実施の形態の電池の接続構造の説明図で、特に、切欠き部が、端子側部の一側に端子端面と略平行に設けられた端子と、係合片が曲面で形成された接続部材と、を示す図である。
【図８】 従来の電池の接続構造の説明図で、特に、端子に設けられた雄ねじにナットを螺合してバスバーを取付けて、端子間が接続された状態を示す図である。
【図９】 従来の電池の接続構造の説明図で、特に、端子に設けられた雌ねじにボルトを螺合してバスバーを取付けて、端子間が接続された状態を示す図である。
【図１０】 従来の電池の接続構造の説明図で、特に、電池配列方向両側に配置したボスにバスバーを架設して端子間が接続された状態を示す図である。
【符号の説明】
１ 電池、３ 正極側端子、３ａ，４ａ 端子端面、４ 負極側端子、５ 接続部材、５ａ 係合片、５ｂ 連結部、６ 切欠き部、６ａ スリット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery connection structure and a connection method, and more particularly, to a battery connection structure and a connection method when terminals between adjacent batteries are electrically connected.
[0002]
[Prior art]
Generally, since a terminal voltage of a lithium ion battery is 3.6 to 3.8 V, a desired voltage is obtained by connecting a plurality of lithium ion batteries in series. In this case, as shown in FIG. 8, a male screw is provided in advance on the end of each terminal 3 and 4, and a bus bar 12 made of a conductive material is attached to each terminal 3 and 4 with a nut 11 screwed to the male screw. Conventionally, the bus bar 12 is constructed between the terminals 3 and 4 to be fastened. Further, as shown in FIG. 9, each terminal 3, 4 is provided with a female screw coaxial with each terminal 3, 4 in advance, and each bus bar 12 made of a conductive material is connected with a bolt 13 screwed to the female screw. Conventionally, the bus bar 12 is installed between the terminals 3 and 4 to be connected to the terminals 3 and 4. Further, as shown in FIG. 10, a pair of bosses 14 provided with female threads on their end faces are erected on the battery holder 15 and the terminals 3 and 4 to be connected are arranged on the axial plane of the boss pair, and each boss 14 An end plate 16 to which a bus bar 12 is attached is installed on each boss 14 with a bolt 13 screwed to the end face. Thus, it has been conventionally performed to press the bus bar 12 against the terminals 3 and 4 and to electrically connect the terminals 3 and 4.
[0003]
In the former conventional example, the terminal is provided with a male screw or a female screw, and the nut 11 or the bolt 13 is used to construct the bus bar 12 between the terminals 3 and 4 so that the terminals 3 and 4 are connected. Assembling man-hours increase and manufacturing costs increase. Further, when the nut 11 or the bolt 13 is tightened, a tightening torque around the axis acts on the terminals 3 and 4, and the joints with the internal electrodes (not shown) are damaged by the rotation of the terminals 3 and 4. There is a risk of doing. Also, in the latter conventional example, the terminals 3 and 4 to which the bus bars 12 provided on the end plate 16 are connected are pressed and the terminals 3 and 4 are electrically connected. Since such a tightening torque does not act, the joint portion between each terminal 3, 4 and the internal electrode is not twisted and broken. However, if the dimensional variations of the terminals 3 and 4 are large, the contact state between the terminals 3 and 4 and the bus bar 12 becomes unstable, and the internal resistance may increase.
[0004]
Therefore, Japanese Utility Model Laid-Open No. 63-15568 includes a U-shaped plate-like terminal, and the plate-like inter-terminal connecting moving body is pressed and clamped by elastic repulsion between the terminals to electrically connect the terminals. Possible lead-acid batteries are disclosed. In this lead-acid battery, there is no need for a nut or bolt to connect between terminals, the number of parts does not increase, and assembly is easy, so that an increase in manufacturing cost can be suppressed. Become. Japanese Patent Laid-Open No. 4-174966 discloses a U-shaped groove of an inter-battery terminal connector having a substantially U-shaped cross-section formed by sheet metal processing and is fitted into both terminals to be connected between batteries. An inter-battery terminal connector and a battery assembly for connecting terminals are disclosed. In the inter-battery terminal connection body and the battery assembly, the terminals are clamped by the spring force of the inter-battery terminal connection body formed in a U shape so that the conductivity between the terminals is reliably maintained.
[0005]
However, both (Japanese Utility Model Publication No. 63-15568 and Japanese Patent Application Laid-Open No. 4-174966) contact and disconnect the terminal and the connecting body by the spring force of the U-shaped plate-like member. When the spring force is reduced due to the influence of the surrounding environment, the contact state between the terminal and the connection body is not uniform, and the internal resistance, that is, the voltage between the terminals is varied.
[0006]
[Problems to be solved by the invention]
Accordingly, the present invention has been made in view of the above circumstances, and it is a first object of the present invention to provide a battery connection structure capable of reducing the number of parts to reduce manufacturing costs and maintaining reliable battery connection. And It is a second object of the present invention to provide a battery connection method capable of reducing the number of parts to reduce the manufacturing cost and maintaining a reliable battery connection.
[0007]
[Means for Solving the Problems]
In order to achieve the first object, the invention according to claim 1 of the present invention is such that a pair of a positive electrode side terminal and a negative electrode side terminal is disposed on the upper surface of the main body portion symmetrically in the approximate center of the battery arrangement direction. A battery connection structure for arranging the adjacent batteries, and connecting between the terminals of the adjacent batteries, each of which is provided in each terminal and formed with a predetermined slit width; and engagement pieces which can engage the engaging pieces in respective notch is provided with connecting members disposed on both ends via an elastically deformable coupling portion, is disposed at both ends of said connecting member Are twisted around the axis in the battery array direction, and the angle around the axis in the battery array direction formed by each notch of each terminal is set larger than the twist angle, and the connection wherein each of said engaging pieces is elastically deformed so as twists parts between the terminals each of the terminals Wherein the engagement to Rukoto in-out portion.
[0008]
According to a second aspect of the present invention, in the first aspect of the present invention, the notch portions are provided substantially parallel to the battery array direction, and the notch portions provided in the terminals are terminal ends. It is characterized in that it is provided obliquely and in the same direction from the portion toward the terminal base, and the connecting portion is elastically deformable by being twisted between the terminals.
[0009]
The invention according to claim 3 is the invention according to claim 1, wherein each notch is provided substantially parallel to the battery array direction, and each notch provided in each terminal is provided on the terminal side. It is characterized in that it is provided obliquely from the portion toward the terminal base and in the same direction, and the connecting portion can be twisted and elastically deformed between the terminals.
[0010]
The invention according to claim 4 is the invention according to claim 1 or 2 , wherein each slit of each notch formed in each end face of each terminal is offset by a predetermined amount from the axis of each terminal. The axis of each terminal and each notch intersect each other inside each terminal.
[0011]
The invention according to claim 5 is the invention according to claim 1, 2 or 4 , wherein the offset amount of each slit is set to be not less than 2 times and not more than 3 times the plate thickness of the engagement piece, An angle between the connecting portion and a straight line orthogonal to each axis of each terminal to be connected is set to 5 degrees or more and 15 degrees or less.
[0012]
In order to achieve the first object, the invention according to claim 6 of the present invention is such that a pair of a positive electrode side terminal and a negative electrode side terminal is disposed on the upper surface of the main body part symmetrically in the approximate center of the battery arrangement direction. A battery connection structure for arranging the adjacent batteries, and connecting between the terminals of the adjacent batteries, each of which is provided in each terminal and formed with a predetermined slit width; and Engaging members that can be engaged with the respective notches at both ends via connecting portions, and each of the notches is arranged on one side of each terminal side. It is provided substantially parallel to the terminal end face, and each engagement piece is formed of a curved surface that can be elastically deformed.
[0013]
In order to achieve the second object, the invention according to claim 7 is a battery in which a pair of a positive electrode side terminal and a negative electrode side terminal is disposed on the upper surface of the main body portion symmetrically in the approximate center of the battery arrangement direction. adjacent arranged, a connection method of battery connecting between terminals of the battery to be placed adjacent, provided notch formed in a predetermined slit width to each terminal, engages the respective notch The engaging pieces of the connecting members arranged at both ends via the elastically deformable connecting portions are arranged so as to form a twist angle around the axis in the battery array direction , and The angle around the axis in the battery arrangement direction formed by each notch of each terminal is set to be larger than the twist angle, and the connecting portions are elastically deformed to twist between the terminals, thereby causing the engagement pieces to be It engages with each notch part, It is characterized by the above-mentioned.
[0014]
Therefore, according to the first aspect of the present invention, the engagement pieces disposed at both ends of the connecting member via the elastically deformable connecting portions are elastically deformed so that the connecting portions are twisted between the terminals. By engaging the piece with each notch of each terminal, the terminals can be electrically connected.
In this case, a required contact surface pressure is generated between the notch and the engaging portion, the contact resistance between the terminal and the connection member is reduced, and an increase in the internal resistance of the battery can be suppressed. Moreover, when attaching a connection member between each terminal, it becomes easy to insert the engagement piece of a connection member into the notch part of a terminal, and can prevent the attached connection member from dropping off.
[0015]
According to the second aspect of the present invention, the connecting portion of the connecting member is twisted by engaging each engaging piece of the connecting member with each notch portion provided from the terminal end portion of each terminal toward the terminal base portion. Thus, it becomes possible to generate a required contact surface pressure between the engagement piece and the terminal, and to suppress variations in internal resistance.
[0016]
In the invention according to claim 3, the coupling portions of the connection member are twisted by engaging the respective engagement pieces of the connection member with the respective notches from the terminal side portion of each terminal toward the terminal base portion. It is elastically deformed and a required contact surface pressure can be generated between the engagement piece and the terminal, and variations in internal resistance can be suppressed. Moreover, compared with the case where a notch is provided from the terminal end face toward the terminal base, the connecting member can be attached at a lower position, and the overall height of the battery can be kept low.
[0017]
In the invention according to the fourth aspect , it is possible to minimize a decrease in the rigidity of the terminal due to the formation of the notch.
[0018]
According to the fifth aspect of the present invention, the required contact surface pressure between the connection member and the terminal is minimized while minimizing a decrease in the rigidity of the terminal due to the formation of the notch and preventing damage to the connection member. Can be obtained.
[0019]
According to the sixth aspect of the present invention, by engaging each notch between the terminals to which each engaging piece of the connecting member is connected, the engaging piece formed of a curved surface is elastically deformed, and the engaging piece and the terminal It is possible to generate a required contact surface pressure between them, and to suppress variations in internal resistance. Moreover, compared with the case where a notch is provided from the terminal end face toward the terminal base, the connecting member can be attached at a lower position, and the overall height of the battery can be kept low.
[0020]
In the invention according to claim 7 , by engaging each engagement piece of the connection member with each notch portion between the terminals, the connection portion of the connection member is elastically deformed to be twisted, and the engagement piece, the terminal, During this period, a required contact surface pressure can be generated, and variations in internal resistance can be suppressed.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
A battery connection structure and a connection method according to an embodiment of the present invention will be described with reference to FIGS. Hereinafter, the same reference numerals are given to the same or corresponding parts. As shown in FIG. 1, the connection structure of the battery 1 is such that the positive electrode side terminal 3 and the negative electrode side terminal 4 of the battery 1 arranged adjacent to each other are connected by a connection member 5 made of a conductive material. As shown in FIGS. 1 to 3, the battery 1 has a main body 2 formed in a box shape, and a pair of a positive electrode side terminal 3 and a negative electrode side terminal 4 is formed on the upper surface of the main body portion 2. Are arranged symmetrically in the left and right (left and right direction in FIG. 3) in the approximate center of the battery arrangement direction (up and down direction in FIG. 2).
[0022]
Each of the terminals 3 and 4 is formed in a substantially cylindrical shape, and each terminal end surface 3a and 4a is provided with a notch 6 formed obliquely from the terminal end surface 3a and 4a toward the terminal base. . The notch 6 is formed so that the slits 6a formed in the terminal end faces 3a and 4a are substantially parallel to the battery arrangement direction, and the same angle from the terminal end faces 3a and 4a toward the terminal base (see FIG. 3 and the same direction. Accordingly, as shown in FIG. 1, the battery 1 is arranged so that the terminals 3 and 4 having different polarities face each other in the battery arrangement direction, so that a notch between the terminals 3 and 4 connected to each other is provided. 6 is configured to form an angle θ2 (θ2 = 2θ1, not shown) around the axis in the battery array direction. Further, as shown in FIG. 5, the notch 6 has a slit 6 a that is offset by L from the axial position of each terminal 3, 4 (C shown in FIG. 5). It is formed to intersect.
[0023]
The connecting member 5 is formed of a plate-like member having a required elastic force. As shown in FIG. 4, an engaging piece 5a that can be engaged with the notch 6 is connected to a connecting portion 5b. It is the structure which connected with. The thickness (T shown in FIG. 4) is set so that the engagement pieces 5a at both ends are fitted into the notches 6 of the terminals 3 and 4 with a predetermined fit. In addition, the connecting member 5 is twisted by a twist angle θ3 (see FIG. 4) around the axis in the battery arrangement direction in a state where the engagement pieces 5a at both ends are free (a state where they are removed from between the terminals 3 and 4). The connecting portion 5b is formed at an angle of θ4 (see FIG. 5) in a plan view with respect to a straight line (C shown in FIG. 5) orthogonal to each axis of each of the terminals 3 and 4 to be connected. .
[0024]
In the connection structure of the battery 1, the angle θ3 about the axis in the battery arrangement direction formed by the engaging pieces 5 a connected by the connecting part 5 b is the same as the notch 6 between the terminals 3 and 4. The angle is set smaller than the angle θ2 formed around the axis in the arrangement direction (θ2> θ3). Further, the offset amount L of the slit 6a of the notch portion 6 shown in FIG. 5 from the axial position of each of the terminals 3 and 4 is set to 2 to 3 times the plate thickness T of the engagement piece 5a, and An angle θ3 formed by the two engaging pieces connected by the connecting portion 5b and a straight line C orthogonal to the axes of the terminals 3 and 4 to be connected is set to 5 to 15 degrees.
[0025]
Next, the effect | action of the connection structure and connection method of this battery is demonstrated. When connecting the batteries 1 and 1 in series, first, as shown in FIG. 1, the batteries 1 and 1 are arranged so that the terminals 3 and 4 having different polarities face each other. Thereby, the notch 6 between the terminals 3 and 4 to be connected forms an angle θ2 around the axis in the battery arrangement direction, and the slit 6a of each terminal end face 3a, 4a is 2L in the direction orthogonal to the battery arrangement direction. The positional relationship is offset by only. Next, the engaging pieces 5a at both ends of the connecting member 5 are inserted into the notches 6 from the slits 6a of the terminal end faces 3a, 4a between the terminals 3, 4, respectively. The notch 6 is engaged with the required fit. At this time, the connecting member 5 is inserted so as to rotate clockwise in plan view with the center position between the axes of the terminals 3 and 4 as the axis.
[0026]
The connecting member 5 attached between the terminals 3 and 4 is elastically deformed so that the connecting portion 5b is twisted between the terminals 3 and 4, and the engagement pieces 5a at both ends are arranged around the axis in the battery array direction. The angle formed increases from θ3 to θ2. Thereby, each engagement piece 5a will be in the state pressed by the surface below the surface of both sides of the slit 6a of each notch part 6, and required between each notch part 6 and each engagement piece 5a. A contact surface pressure can be generated, and the coupling force between the terminals 3 and 4 and the connection member 5 can be increased. Further, the connecting portion 5b forms an angle of θ4 (see FIG. 5) in a plan view with respect to a straight line C orthogonal to the axis of each of the terminals 3 and 4 to be connected. The twisting force of the part increases. As a result, the coupling force between the terminals 3 and 4 and the connection member 5 is further improved, the contact resistance between the terminals 3 and 4 and the connection member 5 is reduced, and the internal resistance of the batteries 1 and 1 is increased. It is possible to suppress the variation in the internal resistance and suppress the internal resistance.
[0027]
This embodiment has the following effects.
In the connection structure of the battery 1, the nut 11 and the bolt 13 for attaching the bus bar 12 for terminal connection used in the conventional battery connection structure (see FIGS. 8 to 10) are eliminated, and the number of parts is reduced. Assembling man-hours can be reduced, and manufacturing costs can be reduced. Further, the connecting portion 5b is elastically deformed so as to be twisted between the terminals 3 and 4, and the engaging pieces 5a at both ends are engaged with the notched portions 6 of the terminals 3 and 4, respectively. And the engagement piece 5a can generate a required contact surface pressure, the contact resistance between the terminals 3 and 4 and the connection member 5 is reduced, and the internal resistance of each battery 1 and 1 is increased. It is possible to suppress the variation in the internal resistance and suppress the internal resistance.
[0028]
Further, the engagement pieces 5a disposed at both ends of the connection member 5 are disposed at a twist angle θ3 around the axis in the battery arrangement direction, and the notch portions 6 between the terminals 3 and 4 are formed. An angle θ2 around the axis in the battery arrangement direction is set to be larger than the twist angle θ3. Accordingly, a required contact surface pressure is generated between the notch 6 and the engagement piece 5a, and the contact resistance between the terminals 3 and 4 and the connection member 5 is reduced, and the internal resistance of each battery 1 and 1 is reduced. Increase can be suppressed. Further, when the connecting member 5 is attached between the terminals 3 and 4, it is easy to insert the engaging pieces 5a of the connecting member 5 into the notch portions 6 of the terminals 3 and 4, and they are attached. The connection member 5 can be prevented from falling off.
[0029]
In addition, the slit 6a of the notch 6 formed in each terminal end face 3a, 4a is offset by a predetermined amount L from the axis of each terminal 3, 4, and the offset amount L of the slit 6a is the amount of the engagement piece 5a. It is set to 2 to 3 times the plate thickness T, and the angle between the connecting portion 5b and the straight line C orthogonal to each axis of each connected terminal 3 and 4 is set to 5 to 15 degrees. . Accordingly, a decrease in rigidity of the terminals 3 and 4 due to the formation of the notch 6 is minimized, the breakage of the connection member 5 is prevented, and between the connection member 5 and the terminals 3 and 4. It is possible to generate a required contact surface pressure and balance the rigidity between the terminals 3 and 4 and the joining member and the coupling force between the terminals 3 and 4 and the connecting member 5 at a high level. it can.
[0030]
In addition, embodiment is not limited above, For example, you may comprise as follows.
As shown in FIG. 6, the notch portion 6 may be provided obliquely from the terminal side portion toward the terminal base portion. In this case, compared with the case where the notch portion 6 is provided from the terminal end surface toward the terminal base portion, the connecting member 5 can be attached at a lower position, and the height of the entire battery can be kept low. Storage space can be saved.
Further, as shown in FIG. 7, a notch portion 6 is provided on one side of the terminal side portion substantially in parallel with the terminal end surfaces 3a and 4a, and the engagement piece 5a is a curved surface that can be elastically deformed in the slit width direction. May be formed. In this case, each engagement piece 5a formed by a curved surface is elastically deformed so as to be compressed by the cutout portion 6 and engaged with each cutout portion 6 between the terminals 3 and 4, thereby each engagement piece. A required contact surface pressure can be generated between the terminal 5a and the terminals 3 and 4, and variations in the internal resistance of the battery 1 can be suppressed. Further, compared to the case where the notch portion 6 is provided from the terminal end faces 3a, 4a toward the terminal base portion, the connecting member 5 can be attached at a lower position, and the overall height of the battery can be kept low. The storage space for the battery 1 can be saved.
[0031]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a battery connection structure that can reduce the number of parts to reduce the manufacturing cost and can maintain a reliable battery connection. In addition, it is possible to provide a battery connection method capable of reducing the number of parts to reduce the manufacturing cost and maintaining a reliable battery connection.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a battery connection structure according to an embodiment of the present invention.
FIG. 2 is a plan view of a single battery.
FIG. 3 is a front view of a single battery.
FIG. 4 is a plan view and a front view of a connection member.
FIG. 5 is a diagram showing a state in which terminals are connected by a connecting member.
FIG. 6 is an explanatory diagram of a battery connection structure according to another embodiment, and particularly shows a terminal in which a notch portion is provided from a terminal side portion toward a terminal base portion.
FIG. 7 is an explanatory diagram of a battery connection structure according to another embodiment, in particular, a notch portion having a terminal provided on one side of the terminal side portion substantially parallel to the terminal end surface, and an engagement piece having a curved surface. It is a figure which shows the connection member formed by.
FIG. 8 is an explanatory diagram of a conventional battery connection structure, and particularly shows a state in which a bus bar is attached by screwing a nut to a male screw provided on a terminal and the terminals are connected to each other.
FIG. 9 is an explanatory diagram of a conventional battery connection structure, and particularly shows a state in which a bolt is screwed to a female screw provided on a terminal and a bus bar is attached, and terminals are connected to each other.
FIG. 10 is an explanatory diagram of a conventional battery connection structure, and particularly shows a state where bus bars are installed on bosses arranged on both sides of the battery arrangement direction and terminals are connected to each other.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery, 3 Positive side terminal, 3a, 4a Terminal end surface, 4 Negative side terminal, 5 Connection member, 5a Engagement piece, 5b Connection part, 6 Notch part, 6a Slit

Claims (7)

本体部上面に正極側端子と負極側端子の一対が電池配列方向の略中央に左右対称に配設された電池を隣接して配置し、隣接して配置される電池の端子間を接続させる電池の接続構造であって、各端子に設けられて所定のスリット幅で形成される切欠き部と、該各切欠き部に係合可能な係合片が弾性変形可能な連結部を介して両端に配設される接続部材と、を具備し、前記接続部材の両端に配設した各係合片が互いに電池配列方向の軸線回りに捩れ角度をなしており、また、前記各端子の各切欠き部がなす電池配列方向の軸線回りの角度が前記捩れ角度よりも大きく設定されており、前記連結部を前記端子間で捩るように弾性変形させて前記各係合片を前記各端子の各切欠き部に係合することを特徴とする電池の接続構造。 A battery in which a pair of a positive electrode side terminal and a negative electrode side terminal are arranged symmetrically on the upper surface of the main body in the center of the battery arrangement direction adjacent to each other, and the terminals of the adjacent batteries are connected to each other The connection structure of each of the first and second ends through a notch portion provided at each terminal and formed with a predetermined slit width, and an engagement piece engageable with each notch portion is elastically deformed. A connecting member disposed on both ends of the connecting member, and the engaging pieces disposed at both ends of the connecting member are twisted around an axis in the battery array direction, and each of the terminals is cut off. The angle around the axis of the battery arrangement direction formed by the notch is set to be larger than the twist angle, and the connecting portions are elastically deformed so as to be twisted between the terminals, so that the engaging pieces are respectively connected to the terminals. connecting structure of the battery, wherein the engagement to Rukoto the notch. 前記各切欠き部が、電池配列方向に略平行に設けられると共に、各端子に設けられる前記各切欠き部が、端子端部から端子基部に向けて斜めに、且つ同一方向に設けられ、また、前記連結部が、前記端子間で捩れて弾性変形可能であることを特徴とする請求項１に記載の電池の接続構造。  Each notch is provided substantially parallel to the battery array direction, and each notch provided in each terminal is provided obliquely from the terminal end toward the terminal base and in the same direction. The battery connection structure according to claim 1, wherein the connecting portion is elastically deformable by being twisted between the terminals. 前記各切欠き部が、電池配列方向に略平行に設けられると共に、各端子に設けられる前記各切欠き部が、端子側部から端子基部に向けて斜めに、且つ同一方向に設けられ、また、前記連結部が、端子間で捩れて弾性変形可能であることを特徴とする請求項１に記載の電池の接続構造。  Each notch is provided substantially parallel to the battery array direction, and each notch provided in each terminal is provided obliquely from the terminal side to the terminal base and in the same direction. The battery connection structure according to claim 1, wherein the connecting portion is elastically deformable by being twisted between terminals. 前記各端子の各端面に形成される前記各切欠き部の各スリットが、前記各端子の軸線から所定量オフセットされ、前記各端子の軸線と前記各切欠き部とが前記各端子の内部で交わることを特徴とする請求項１または２に記載の電池の接続構造。Each slit of each notch formed on each end face of each terminal is offset by a predetermined amount from the axis of each terminal, and the axis of each terminal and each notch are inside each terminal. connecting structure of the battery according to claim 1 or 2, characterized in that meet. 前記各スリットのオフセット量が、前記係合片の板厚の２倍以上３倍以下に設定されると共に、前記連結部が、接続される各端子の各軸線と直交する直線となす角度が、５度以上１５度以下に設定されることを特徴とする請求項１、２または４に記載の電池の接続構造。The offset amount of each slit is set to be not less than 2 times and not more than 3 times the plate thickness of the engagement piece, and the angle between the connecting portion and the straight line orthogonal to each axis of each terminal to be connected is connecting structure of the battery according to claim 1, 2 or 4, characterized in that it is set to be equal to or less than 5 degrees to 15 degrees. 本体部上面に正極側端子と負極側端子の一対が電池配列方向の略中央に左右対称に配設された電池を隣接して配置し、隣接して配置される電池の端子間を接続させる電池の接続構造であって、各端子に設けられて所定のスリット幅で形成される切欠き部と、該各切欠き部に係合可能な係合片が連結部を介して両端に配設される接続部材と、を具備し、前記各切欠き部が、各端子側部の一側に前記各端子端面と略平行に設けられ、また、前記各係合片が弾性変形可能な曲面で形成されることを特徴とする電池の接続構造。 A battery in which a pair of a positive electrode side terminal and a negative electrode side terminal are arranged symmetrically on the upper surface of the main body in the center of the battery arrangement direction adjacent to each other, and the terminals of the adjacent batteries are connected to each other In this connection structure, a notch portion provided at each terminal and formed with a predetermined slit width, and an engagement piece engageable with each notch portion are disposed at both ends via a connecting portion. Each notch is provided on one side of each terminal side substantially parallel to each terminal end face, and each engagement piece is formed of a curved surface that can be elastically deformed. Battery connection structure characterized by being made. 本体部上面に正極側端子と負極側端子の一対が電池配列方向の略中央に左右対称に配設された電池を隣接して配置し、隣接して配置される電池の端子間を接続する電池の接続方法であって、各端子に所定のスリット幅で形成した切欠き部を設け、該各切欠き部に係合可能な係合片が弾性変形可能な連結部を介して両端に配設される接続部材の各係合片を互いに電池配列方向の軸線回りに捩れ角度をなすように配設し、また、前記各端子の各切欠き部がなす電池配列方向の軸線回りの角度を前記捩れ角度よりも大きく設定して、前記連結部を前記端子間で捩るように弾性変形させて前記各係合片を各切欠き部に係合することを特徴とする電池の接続方法。 A battery in which a pair of a positive electrode side terminal and a negative electrode side terminal are arranged symmetrically in the center of the battery arrangement direction on the upper surface of the main body, adjacent to each other, and connected between adjacent battery terminals In this connection method, each terminal is provided with a notch portion formed with a predetermined slit width, and an engaging piece engageable with each notch portion is disposed at both ends via a resiliently deformable connecting portion. The engaging pieces of the connecting members are arranged so as to form a twist angle around the axis in the battery arrangement direction, and the angle around the axis in the battery arrangement direction formed by each notch of each terminal is A battery connecting method , wherein the connecting portion is elastically deformed so as to be twisted between the terminals by setting it to be larger than a twist angle, and the engaging pieces are engaged with the notches .
JP2002048164A 2002-02-25 2002-02-25 Battery connection structure and connection method Expired - Fee Related JP4171873B2 (en)

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US20090075163A1 (en) * 2007-09-14 2009-03-19 Ford Global Technologies, Llc System and method for electrically connecting terminals of a battery
US7972185B2 (en) * 2009-03-16 2011-07-05 Sb Limotive Co., Ltd. Battery module having connector for connecting terminals
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KR101244739B1 (en) * 2011-05-09 2013-03-18 로베르트 보쉬 게엠베하 Battery module
US20130260611A1 (en) * 2012-04-03 2013-10-03 Jang-Gun Ahn Battery module
JP2014099290A (en) * 2012-11-13 2014-05-29 Japan Aviation Electronics Industry Ltd Connector and battery pack
KR20140066929A (en) * 2012-11-23 2014-06-03 삼성에스디아이 주식회사 Rechargeable battery and module of the same
JP5858291B2 (en) * 2012-12-20 2016-02-10 株式会社豊田自動織機 Battery module
KR101794096B1 (en) * 2013-04-16 2017-11-06 삼성에스디아이 주식회사 Rechargeable battery module with bus bar
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