JP4359417B2

JP4359417B2 - Battery with terminal

Info

Publication number: JP4359417B2
Application number: JP2002216730A
Authority: JP
Inventors: 哲也矢野; 伸一郎田原; 武史乾; 俊哉桑村
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2001-07-31
Filing date: 2002-07-25
Publication date: 2009-11-04
Anticipated expiration: 2022-07-25
Also published as: JP2003115292A

Description

【０００１】
【発明の属する技術分野】
本発明は、電池を回路基板に実装するための端子が取り付けられた端子付き電池に関し、この端子付き電池が装着された機器が廃棄処理される際に、回路基板から電池を取り外す作業を容易にする構造を設けたことを特徴とするものである。
【０００２】
【従来の技術】
リチウム電池のように長期間にわたって安定した出力電圧が得られる電池は、ガスメータの電源やメモリバックアップの電源として用いられ、電子回路を構成した回路基板に他の電子部品と共に実装される。回路基板に実装する用に供される電池は、回路基板に実装できるように正極及び負極に回路基板挿入用の端子が取り付けられる。
【０００３】
図７は、円筒形リチウム電池として構成された電池本体１に正極端子２１及び負極端子２２を取り付けた端子付き電池の従来構成を示すものである。正極端子２１はその一端側が電池本体１の正極に溶接され、他端側は電池本体１の円筒軸方向の投影面積外に突出して、その先端には２本の回路基板への正極挿入用端子２１ａが形成されている。負極端子２２はその一端側が電池本体１の負極に溶接され、他端側は電池本体１の投影面積外に突出して、その先端には１本の負極挿入用端子２２ａを形成して、回路基板に正極、負極が逆向きに装着されないようにしている。
【０００４】
また、パーソナルコンピュータなどではメモリバックアップやカレンダーＩＣの電源として扁平形のコイン形リチウム電池が用いられ、図１４に示すように、端子付き電池として回路基板に実装される。コイン形電池に対する端子の取り付け形態は様々であるが、図１４に示す端子付き電池では、電池本体３１の正極となる電池缶３５に一端側を溶接して正極端子５１が取り付けられ、負極となる封口板３６に一端側を溶接して負極端子５２が取り付けられている。正極端子５１及び負極端子５２の他端側は電池本体３１の投影面積外に延出され、その先端に回路基板に挿入する正極挿入端子５１ａ及び負極挿入端子５２ａが形成されている。
【０００５】
このような回路基板に実装するための端子付き電池は、それを用いた機器の耐用年数の経過や故障などにより廃棄されるときには、回路基板から取り外されて有用材料の回収の用に供される。例えば、リチウム電池の活物質として用いられているリチウムは海外資源に依存しており、これを回収してリサイクル、再利用することが資源の有効利用につながる。
【０００６】
機器が廃棄される際に、回路基板に実装された電池の取り外しを容易にするための端子構造として、特開２０００−２４３３７７号公報に開示されたものが知られている。ここに開示された端子構造は、リード端子に薄肉部分や切欠部分、ミシン目状部分のような切断を容易にする機構を形成して、電池の取り外し時にリード端子の切断を容易にしている。
【０００７】
【発明が解決しようとする課題】
しかしながら、端子付き電池を回路基板から取り外す際に、単に端子を切断するだけでは、電池本体より外に正極端子及び負極端子が突出しているので、正極端子と負極端子との間が何らかの金属物により短絡される恐れが多分にある。例えば、図７に示した端子付き電池を回路基板から取り外す際に、正極挿入用端子２１ａ及び負極挿入用端子２２ａを切断しても電池本体より外に正極端子２１及び負極端子２２が突出しているため、これを金属製の収集容器に投入した場合に、正極端子２１と負極端子２２との間が短絡されやすい状態になる。
【０００８】
また、コイン形の端子付き電池の場合では、電池本体の正極となる電池缶３５、負極となる封口板３６が絶縁物で被覆されることなく金属部分が全て露出しているため、正極、負極間が短絡しやすい状態となる。
【０００９】
回路基板に実装する用に供される電池は主にリチウム電池であり、その寿命は長く、これを用いた機器が廃棄された後でも放電エネルギーを残している場合が多く、正極と負極との間が何らかの金属物で短絡されたとき、リチウム電池のようなエネルギー密度の高い電池では発熱に伴って発火や破裂に至る恐れが多分にある。また、前述の特開２０００−２４３３７７号として開示された発明が対象とする電気二重層キャパシタは、蓄電を主目的とするデバイスであるため、放電エネルギーが残存している度合いは大きく、短絡によってリチウム電池と同様の問題が発生する。
【００１０】
比較的大型のリチウム電池では、短絡により大電流が流れたとき放電回路を遮断したり、過大な放電電流を阻止するなどの短絡防止機能や短絡に伴って電池内圧が異常上昇したとき、内圧を外部放出する排出弁等の機能が設けられているが、回路基板に実装するための小型のリチウム電池では、前記のような機能を備えることができないため、廃棄された機器の処理において短絡を発生させることを防止する必要がある。
【００１１】
本発明が目的とするところは、回路基板から取り外された電池の正極、負極間の短絡を防止する端子構造を設けた端子付き電池を提供することにある。
【００１２】
【課題を解決するための手段】
上記目的を達成するための本願第１発明は、円筒形に形成された電池本体の両端に設けられた正極及び負極にそれぞれ一端側が接合され、他端側が電池本体の円筒軸方向の投影面積外に位置するように正極端子及び負極端子が取り付けられてなる端子付き電池において、前記正極端子及び負極端子は、その一端側から他端側に至る前記投影面積内の位置で、立ち上がり部を有する段差が設けられ、前記立ち上がり部は開口部と前記開口部の両側に小さい幅で残された小幅部から形成されたことを特徴とする。
【００１３】
上記構成になる端子付き電池は、これが用いられた機器の廃棄に伴って実装された回路基板から取り外すとき、易破断部をニッパー等の切断工具により切断することにより端子付き電池を回路基板から容易に切り離すことができる。取り外された端子付き電池は、回収容器等に投入されて電池や金属物に混入したとき、電池本体から外に端子が突出していると、電池の正極と負極との間が金属により短絡される確率が増加し、リチウム電池などの場合に短絡に伴う発火や破裂の恐れがある。しかし、易破断部は投影面積の中にあるので、端子が切断された端子付き電池は、電池本体から外に端子の突出がなく、短絡が生じる確率は大幅に減少するので、廃棄処理時の電池による危険性が抑制される。また、上記構成によれば、回路基板から端子付き電池を取り出すとき、回路基板の面に対して鉛直の方向から易破断部に切断工具の刃先を挿入することができるので、端子付き電池の周囲に電子部品が実装されていても取り出しの作業に支障が生じない。
【００１６】
また、本願第２発明は、扁平形に形成された電池本体の両側平坦面にそれぞれ設けられた正極及び負極にそれぞれ一端側が接合され、他端側が電池本体の投影面積の外に延出するように正極端子及び負極端子が取り付けられ、一方の端子は前記平坦面と平行に取り付けられ、他方の端子は他端側が折り曲げられ前記一方の端子と同一平面上に位置するように取り付けられてなる端子付き電池において、
前記一方の端子の他端側は前記電池本体から外れた位置に、開口部とその両側の切り欠き部とに挟まれた易破断部を有し、
前記他方の端子の他端側は、前記電池本体の円盤軸方向の投影面積内となる位置に、開口部とその両側の切り欠き部とに挟まれた易破断部をすることを特徴とする。
【００１７】
上記構成になる端子付き電池は、これが用いられた機器の廃棄に伴って実装された回路基板から取り外すとき、易破断部を基板の面に対して鉛直の方向からニッパー等の切断工具により切断することにより端子付き電池を回路基板から容易に切り離すことができる。取り外された端子付き電池は、回収容器等に投入されて電池や金属物に混入したとき、電池本体から外に端子が突出していると、電池の正極と負極との間が金属により短絡される確率が増加し、リチウム電池などの場合に短絡に伴う発火や破裂の恐れがあるが、一方の端子は切断後に電池本体から外に端子の突出がなく、短絡が生じる確率は大幅に減少するので、廃棄処理時の電池による危険性が抑制される。
【００２０】
【発明の実施の形態】
以下、添付図面を参照して本発明の実施形態について説明し、本発明の理解に供する。尚、以下に示す実施形態は本発明を具体化した一例であって、本発明の技術的範囲を限定するものではない。
【００２１】
図１は、第１の実施形態に係る端子付き電池Ａの構成を示すもので、円筒形のリチウム一次電池として構成された電池本体１の正極１ａに正極端子２の一端側が接合され、負極１ｂに負極端子３の一端側が接合され、正極端子２及び負極端子３それぞれの他端側は回路基板に形成された挿入孔に挿入できるように正極挿入用端子２ａ、負極挿入用端子３ａが形成され、この端子付き電池Ａを回路基板に実装できるように構成されている。
【００２２】
前記正極端子２は、図２（ａ）に示すように、一端側に電池本体１の正極１ａに溶接により接合するための正極接合面２ｂが形成され、他端側に電池本体１の円筒軸方向の投影面積から外に出た両端に回路基板に挿入するための正極挿入用端子２ａ、２ａが形成されている。また、前記正極接合面２ｂから正極挿入用端子２ａに至る途上に、形成位置が前記投影面積内になるように開口部２ｃが形成され、この開口部２ｃの形成により、その両側に幅の狭い小幅部として易破断部２ｄが形成される。
【００２３】
また、前記負極端子３は、図２（ｂ）に示すように、一端側に電池本体１の負極１ｂに溶接により接合するための負極接合面３ｂが形成され、他端側に電池本体１の円筒軸方向の投影面積から外に回路基板に挿入するための負極挿入用端子３ａが形成されている。また、前記負極接合面３ｂから負極挿入用端子３ａに至る途上に、形成位置が前記投影面積内になるように開口部３ｃが形成され、この開口部３ｃの形成により、その両側に幅の狭い易破断部３ｄが形成される。尚、この負極端子３には負極挿入用端子３ａが１本形成され、正極端子２には正極挿入用端子２ａが２本形成されていることにより、端子付き電池Ａが回路基板に逆向きに装着されることを防止している。
【００２４】
上記構成になる端子付き電池Ａを用いた機器が寿命もしくは故障等により廃棄処理されるとき、機器に装備されている回路基板から端子付き電池Ａが取り外され、リチウム等の有用金属の回収の用に供される。この端子付き電池Ａを取り外すには、正極端子２の易破断部２ｄ及び負極端子３の易破断部３ｄをニッパー等の切断工具により切断して回路基板から端子付き電池Ａを切り離す。易破断部２ｄ、３ｄは開口部２ｃ、３ｃの形成により小さい幅になっているので切断が容易で、端子付き電池Ａの取り出し作業を効率よく行うことができる。
【００２５】
易破断部２ｄ、３ｄの切断により、開口部２ｃ、３ｃが電池本体１の円筒軸方向投影面積内に位置しているため、正極端子２及び負極端子３が切断された端子付き電池Ａ’は、図３に示すように、電池本体１の両側に投影面積内に収まるように正極端子残片２’、負極端子残片３’が残った状態になる。この状態では電池本体１の正極１ａと負極１ｂとの間が金属物によって短絡される状態は起こり難く、取り外された端子付き電池Ａ’に放電容量が残っていても短絡に伴う発火や破裂の発生は大幅に抑制される。
【００２６】
端子付き電池Ａを回路基板から取り出すための作業をより容易にするために、図４に示す第２の実施形態に係る端子付き電池Ｂでは、正極端子４及び負極端子５に形成した易破断部４ｄ、５ｄを外方に膨出させている。このように易破断部４ｄ、５ｄが外方に膨出していると、易破断部４ｄ、５ｄに切断工具の刃先を充分に挿入することができ、更には切断工具の刃先を挿入する方向の自由度も高くなるので、切断作業の作業性が向上する。
【００２７】
回路基板上には他の電子部品が多数実装されており、端子付き電池Ａの場合、易破断部２ｄの傍らに電子部品が実装されていると、切断工具で易破断部２ｄを切断する邪魔になることがあり、障害となる電子部品を先に取り外す手間を要する場合がある。その点では、端子付き電池Ｂの場合には、切断工具の刃先を挿入する方向角度の範囲は広くなって、取り外しの作業性が向上する。それでも周囲に実装された電子部品が取り外しの障害となるのは避け難い。回路基板の面に対して鉛直の方向から切断作業が実施できるようにすると、電子部品の実装密度に関係なく切断の作業性を向上させることができる。これを実現する構成を第３の実施形態として次に説明する。
【００２８】
図５（ａ）は、第３の実施形態に係る端子付き電池Ｃの構成を示すもので、正極端子６及び負極端子７は曲げ加工により段差が形成され、段差の立ち上がり部位に易破断部６ｄ、７ｄが形成されている。
【００２９】
正極端子６は、一端側に電池本体１の正極１ａに溶接により接合される接合部６ｂが形成され、他端側に回路基板に挿入する正極挿入用端子６ａが形成され、一端側から他端側に至る途中の電池本体１の円筒方向投影面積内に段差を形成し、段差の立ち上がり部位に開口部６ｃを形成することによって、その両側に切断を容易にする易破断部６ｄが形成されている。一方、負極端子７は、図５（ｂ）に示すように、正極端子６と同様の構成であるが、回路基板に挿入する負極挿入用端子７ａを１本にして、正極、負極が逆挿入されないようにしている。
【００３０】
上記構成によれば、回路基板から端子付き電池Ｃを取り出すとき、回路基板の面に対して鉛直の方向から易破断部６ｄ、７ｄに切断工具の刃先を挿入することができるので、端子付き電池Ｃの周囲に電子部品が実装されていても取り出しの作業に支障が生じない。また、易破断部６ｄ、７ｄが形成された段差の立ち上がり部位は、電池本体１の円筒軸方向の投影面積内に位置しているので、易破断部６ｄ、７ｄで正極端子６及び負極端子７が切断された後の残片は電池本体１の直径方向に外には突出せず、突出した正極端子６と負極端子７とが金属物によって短絡されることは大幅に減少する。
【００３１】
図６に示す端子付き電池Ｄのように、正極端子８及び負極端子９に段差を形成した構成において、開口部８ｃは段差の正極挿入用端子８ａ側に形成することもできる。この場合は、図６（ｂ）に示すように、開口部８ｃは電池本体１の円筒軸方向の投影面積内に位置するように形成すると、開口部８ｃの両側に形成される易破断部８ｄも投影面積内に位置し、それが切断されたとき、電池本体１の直径方向に正極端子８の残片が突出することがない。負極端子９についても同様に形成することにより、回路基板から取り出した端子付き電池Ｄの正極、負極間が短絡する確率は大幅に減少する。
【００３２】
次に、電池本体の形状が異なる端子付き電池に適用した第５〜第８の各実施形態について、図８〜図１２を参照して説明する。第５〜第８の各実施形態に係る端子付き電池は、一般にコイン形電池と称されている扁平形の電池本体の正極及び負極にそれぞれ回路基板への実装用の端子を取り付けたものである。
【００３３】
コイン形電池として構成された電池本体３１は、図８に示すように、浅い有底円筒状に形成された電池缶３５内に発電要素を収容し、電池缶３５の開口部にガスケットを介して封口板３６をかしめ固定することにより電池缶３５内を封止して形成され、一般に電池缶３５が正極に、封口板３６が負極に構成される。
【００３４】
この電池本体３１を用いた第５の実施形態に係る端子付き電池Ｅは、図８に示すように、電池缶３５に一端側を溶接により接合して正極端子３２が設けられ、封口板３６に一端側を溶接により接合して負極端子３３が設けられている。正極端子３２及び負極端子３３は、それぞれ一端側から他端側に至る途中で９０度に折り曲げられ、他端側の先端部分は回路基板に挿入実装できるように細幅の正極挿入用端子３２ｄ、負極挿入用端子３３ｄに形成されている。
【００３５】
正極端子３２には、円盤軸方向の封口板３６の平坦面より電池缶３５寄りの位置に、開口部３２ａとその両側の切欠部３２ｂ，３２ｂとに挟まれた易破断部３２ｃ，３２ｃが形成されている。また、負極端子３３には、図９に負極端子３３を独立表示するように、円盤直径方向の電池缶３５の外周面より中心軸寄りの位置に、開口部３３ａとその両側の切欠部３３ｂ，３３ｂとに挟まれた易破断部３３ｃが形成されている。
【００３６】
上記構成になる端子付き電池Ｅは、これを用いる機器に設けられた回路基板に形成された挿入穴に正極挿入用端子３２ｄ及び負極挿入用端子３３ｄを挿入し、正極挿入用端子３２ｄ及び負極挿入用端子３３ｄを回路基板の反対面側で折り曲げ加工した後に半田付けされることにより回路基板に実装される。この機器が寿命もしくは故障等により廃棄処理されるとき、回路基板から端子付き電池Ｅは取り外され、リチウム等の有用金属回収の用に供される。この端子付き電池Ｅを回路基板から取り外すには、正極端子３２の易破断部３２ｃ及び負極端子３３の易破断部３３ｃをニッパー等の切断工具により切断して回路基板から端子付き電池Ｅを切り離す。易破断部３２ｃ，３３ｃを形成するための開口部３２ａ，３３ａ及び切欠部３２ｂ，３３ｂは、丸穴と円弧によって形成してもよいが、図示するように、角穴に形成された開口部３２ａ，３３ａとその角部に角部を対向させた切欠部３２ｂ，３３ｂに形成することにより、切断工具による切断位置が一定し、切断が容易となる。
【００３７】
易破断部３２ｃ，３３ｃの切断により回路基板から取り外された端子付き電池Ｅは、電池本体３１の円盤軸方向においては正極端子３２は電池缶３５の高さ寸法範囲内にあり、電池本体３１の直径方向においては負極端子３３は電池缶３５の外周面より内側となるので、取り外された端子付き電池Ｅが金属製容器内に投入されたときにも正極、負極間の短絡が防止できる。即ち、図１０に示すように、易破断部３２ｃ，３３ｃで切断して取り外された端子付き電池Ｅ’は、金属製容器Ｍ内に封口板３６の平坦面で接地しても封口板３６と正極端子３２との間が金属製容器Ｍによって短絡されることはない。同じく図１０に示すように、金属製容器Ｍ内に電池缶３５の外周面で接地したときにも電池缶３５と負極端子３３との間が金属製容器によって短絡されることがない。従って、リチウム電池のように寿命が長く、それを用いた機器が廃棄された後でも放電エネルギーを残しているような場合でも、正極、負極間の短絡による端子付き電池Ｅの発火や破裂が防止できる。
【００３８】
図８に示した端子付き電池Ｅは、正極端子３２の正極挿入用端子３２ｄ及び負極端子３３の負極挿入用端子３３ｄが同一形状であるため、回路基板に逆向きに挿入されてしまう恐れがある。これを防止するため、図１１に示す第６の実施形態に係る端子付き電池Ｆのように、一方の端子、ここでは正極端子３７の正極挿入用端子３７ｄを２本足に形成して、逆挿入の防止を図ることができる。
【００３９】
この端子付き電池Ｆの場合にも、正極端子３７には開口部３７ａとその両側に切欠部３７ｂ，３７ｂを設けて易破断部３７ｃ，３７ｃが形成されている。尚、負極端子３３は、図９に示した端子付き電池Ｅのものと同一であり、その易破断部３３ｃの同一構成である。
【００４０】
図１２は、第７の実施形態に係る端子付き電池Ｇの構成を示すもので、電池本体３１の円盤面を回路基板に対して鉛直方向にして実装できるように構成されている。電池本体３１の正極となる電池缶３５には、その一端側を溶接により接合して正極端子４０が取り付けられ、電池本体３１の負極となる封口板３６には、その一端側を溶接により接合して負極端子４１が取り付けられている。正極端子４０の他端側は電池本体３１の投影面積外に延出され、その先端には回路基板の挿入穴に挿入実装することができるように細幅に正極挿入用端子４０ｄが形成され、負極端子４１の他端側は電池本体３１の投影面積外に延出され、その先端には回路基板の挿入穴に挿入実装することができるように細幅に負極挿入用端子４１ｄが形成されている。図示するように正極挿入用端子４０ｄと負極挿入用端子４１ｄの幅が異なるように形成されているので、回路基板に正極、負極が逆装填されることが防止できる。
【００４１】
図１２（ａ）に示すように、正極端子４０には、開口部４０ａとその両側の切欠部４０ｂ，４０ｂとに挟まれて易破断部４０ｃ，４０ｃが形成されている。この易破断部４０ｃの形成位置は正極端子４０の切断作業が容易な任意位置でよい。
【００４２】
図１２（ｃ）に示すように、負極端子４１には、開口部４１ａとその両側の切欠部４１ｂ，４１ｂとに挟まれて易破断部４１ｃ，４１ｃが形成されている。この易破断部４１ｃの形成位置は、電池缶３５の外周面より内側寄りの位置、即ち、電池本体３１の円盤軸方向投影面積内に形成される。
【００４３】
上記構成になる端子付き電池Ｇは、これを用いる機器に設けられた回路基板に形成された挿入穴に正極挿入用端子４０ｄ及び負極挿入用端子４１ｄを挿入し、正極挿入用端子４０ｄ及び負極挿入用端子４１ｄを回路基板の反対面側で折り曲げ加工した後に半田付けされることにより回路基板に実装される。この機器が寿命もしくは故障等により廃棄処理されるとき、回路基板から端子付き電池Ｇは取り外され、リチウム等の有用金属回収の用に供される。この端子付き電池Ｇを回路基板から取り外すには、正極端子４０の易破断部４０ｃ及び負極端子４１の易破断部４１ｃをニッパー等の切断工具により切断して回路基板から端子付き電池Ｇを切り離す。易破断部４０ｃ，４１ｃを形成するための開口部４０ａ，４１ａ及び切欠部４０ｂ，４１ｂは、丸穴と円弧によって形成してもよいが、図示するように、角穴に形成された開口部４０ａ，４１ａとその角部に角部を対向させた切欠部４０ｂ，４１ｂに形成することにより、切断工具による切断位置が一定し、切断が容易となる。
【００４４】
易破断部４０ｃ，４１ｃの切断により回路基板から取り外された端子付き電池Ｇは、負極端子４１が電池本体３１の投影面積内に在る易破断部４１ｃで切断されているので、取り外された端子付き電池Ｇが金属製容器内に投入されたときに、金属製容器内に電池缶３５の外周面で接地したときにも電池缶３５と負極端子３３との間が金属製容器によって短絡されることがない。従って、リチウム電池のように寿命が長く、それを用いた機器が廃棄された後でも放電エネルギーを残しているような場合でも、正極、負極間の短絡による端子付き電池Ｇの発火や破裂が防止できる。
【００４５】
図１３は、第８の実施形態に係る端子付き電池Ｈの構成を示すもので、回路基板に表面実装できるように、電池本体３１の電池缶３５に正極端子４３、封口板３６に負極端子４４が取り付けられている。
【００４６】
電池本体３１を構成する電池缶３５の平坦面には、その一端側を溶接により接合して正極端子４３が平坦面と平行に取り付けられ、封口板３６の平坦面には、その一端側を溶接により接合した負極端子４４が折り曲げ加工により他端側が正極端子４３と同一平面上に位置するように取り付けられている。
【００４７】
正極端子４３には、回路基板に実装された状態の端子付き電池Ｈから切断しやすい位置、即ち電池本体３１から外れた位置に、開口部４３ａとその両側の切欠部４３ｂ，４３ｂとに挟まれた易破断部４３ｃが形成されている。また、負極端子４４には、電池本体３１の円盤軸方向の投影面積内となる位置に、開口部４４ａとその両側の切欠部４４ｂ，４４ｂとに挟まれた易破断部４４ｃが形成されている。
【００４８】
上記構成になる端子付き電池Ｈは、これを用いる機器に設けられた回路基板の表面上に配設され、正極端子４３の他端側先端部及び負極端子４４の他端側先端部が回路基板のランドに半田付けされることにより表面実装される。この機器が寿命もしくは故障等により廃棄処理されるとき、回路基板から端子付き電池Ｈは取り外され、リチウム等の有用金属回収の用に供される。この端子付き電池Ｈを回路基板から取り外すには、正極端子４３の易破断部４３ｃ及び負極端子４４の易破断部４４ｃをニッパー等の切断工具により切断して回路基板から端子付き電池Ｈを切り離す。易破断部４３ｃ，４４ｃを形成するための開口部４３ａ，４４ａ及び切欠部４３ｂ，４４ｂは、丸穴と円弧によって形成してもよいが、図示するように、角穴に形成された開口部４３ａ，４４ａとその角部に角部を対向させた切欠部４３ｂ，４４ｂに形成することにより、切断工具による切断位置が一定し、切断が容易となる。
【００４９】
易破断部４３ｃ，４４ｃの切断により回路基板から取り外された端子付き電池Ｈは、負極端子４４が電池本体３１の投影面積内に在る易破断部４４ｃで切断されているので、取り外された端子付き電池Ｈが金属製容器内に投入されたときに、金属製容器内に電池缶３５の外周面で接地したときにも電池缶３５と負極端子４４との間が金属製容器によって短絡されることがない。従って、リチウム電池のように寿命が長く、それを用いた機器が廃棄された後でも放電エネルギーを残しているような場合でも、正極、負極間の短絡による端子付き電池Ｈの発火や破裂が防止できる。
【００５０】
以上説明した各実施形態は、断面形状が円形の端子付き電池に切断部位を特定したものであるが、断面形状が四角形などの形状のものにおいても同様に構成することができる。
【００５１】
【発明の効果】
以上の説明の通り本発明によれば、廃棄処理される回路基板に実装された端子付き電池を回路基板から取り出す作業が容易であり、取り出された端子付き電池の正極と負極との間が金属物により短絡される状態は著しく減少し、短絡による不測の事故を防止することができる。
【図面の簡単な説明】
【図１】第１の実施形態に係る端子付き電池の構成を示す斜視図。
【図２】同上構成における正極端子（ａ）及び負極端子（ｂ）の構成を示す平面図。
【図３】同上構成における易破断部を切断した状態を示す斜視図。
【図４】第２の実施形態に係る端子付き電池の構成を示す斜視図。
【図５】（ａ）は第３の実施形態に係る端子付き電池の構成を示す斜視図、（ｂ）は負極端子の構成を示す斜視図。
【図６】（ａ）は第４の実施形態に係る端子付き電池の構成を示す斜視図、（ｂ）は正極端子の構成を示す平面図。
【図７】従来技術に係る端子付き電池の構成を示す斜視図。
【図８】第５の実施形態に係る端子付き電池の構成を示す（ａ）（ｅ）は平面図、（ｂ）〜（ｄ）は側面図。
【図９】負極端子の構成を示す斜視図。
【図１０】短絡を発生させない状態を説明する説明図。
【図１１】第６の実施形態に係る端子付き電池の構成を示す（ａ）（ｅ）は平面図、（ｂ）〜（ｄ）は側面図。
【図１２】第７の実施形態に係る端子付き電池の構成を示す（ａ）（ｃ）は平面図、（ｂ）（ｄ）は側面図。
【図１３】第８の実施形態に係る端子付き電池の構成を示す（ａ）（ｃ）は平面図、（ｂ）（ｄ）は側面図。
【図１４】従来技術に係る端子付き電池の構成を示す（ａ）（ｃ）は平面図、（ｂ）は側面図。
【符号の説明】
１、３１電池本体
２、４、６、８、３２、３７、４０、４３正極端子
３、５、７、９、３３、４１、４４負極端子
２ｃ〜８ｃ、３２ａ、３３ａ、３７ａ、４０ａ、４１ａ、４３ａ、４４ａ開口部
２ｄ〜８ｄ、３２ｃ、３３ｃ、３７ｃ、４０ｃ、４１ｃ、４３ｃ、４４ｃ易破断部
３２ｂ、３３ｂ、３７ｂ、４０ｂ、４１ｂ、４３ｂ、４４ｂ切欠部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery with a terminal to which a terminal for mounting a battery on a circuit board is attached. When a device equipped with the battery with a terminal is disposed of, the operation of removing the battery from the circuit board is facilitated. The structure which provides is characterized by providing.
[0002]
[Prior art]
A battery that can obtain a stable output voltage for a long period of time, such as a lithium battery, is used as a power source for a gas meter or a memory backup, and is mounted on a circuit board that constitutes an electronic circuit together with other electronic components. A battery provided for mounting on a circuit board has a terminal for inserting a circuit board attached to the positive electrode and the negative electrode so that the battery can be mounted on the circuit board.
[0003]
FIG. 7 shows a conventional configuration of a battery with a terminal in which a positive electrode terminal 21 and a negative electrode terminal 22 are attached to a battery body 1 configured as a cylindrical lithium battery. One end of the positive electrode terminal 21 is welded to the positive electrode of the battery body 1, the other end protrudes outside the projection area in the cylindrical axis direction of the battery body 1, and a positive electrode insertion terminal for two circuit boards at the tip of the positive electrode terminal 21. 21a is formed. One end side of the negative electrode terminal 22 is welded to the negative electrode of the battery body 1, the other end side protrudes outside the projected area of the battery body 1, and one negative electrode insertion terminal 22 a is formed at the tip of the circuit board. The positive electrode and the negative electrode are not mounted in the reverse direction.
[0004]
Further, in a personal computer or the like, a flat coin-type lithium battery is used as a power source for memory backup or calendar IC, and as shown in FIG. 14, it is mounted on a circuit board as a battery with a terminal. The terminal mounting form for the coin-type battery is various, but in the battery with a terminal shown in FIG. 14, one end side is welded to the battery can 35 serving as the positive electrode of the battery body 31 to be the negative electrode. A negative electrode terminal 52 is attached to the sealing plate 36 by welding one end side. The other end sides of the positive electrode terminal 51 and the negative electrode terminal 52 are extended out of the projected area of the battery main body 31, and a positive electrode insertion terminal 51a and a negative electrode insertion terminal 52a to be inserted into the circuit board are formed at the tips.
[0005]
When a battery with a terminal for mounting on such a circuit board is discarded due to the lapse of the useful life or failure of a device using the battery, it is removed from the circuit board and used for recovering useful materials. . For example, lithium used as an active material for lithium batteries depends on overseas resources, and recovering, recycling and reusing them leads to effective use of resources.
[0006]
As a terminal structure for facilitating the removal of the battery mounted on the circuit board when the device is discarded, one disclosed in Japanese Patent Application Laid-Open No. 2000-243377 is known. In the terminal structure disclosed herein, a mechanism for facilitating cutting such as a thin-walled portion, a notch portion, or a perforated portion is formed on the lead terminal to facilitate cutting of the lead terminal when the battery is removed.
[0007]
[Problems to be solved by the invention]
However, when removing the battery with a terminal from the circuit board, simply cutting the terminal protrudes the positive electrode terminal and the negative electrode terminal outside the battery body, so there is some metal between the positive electrode terminal and the negative electrode terminal. May be short-circuited. For example, when the terminal-equipped battery shown in FIG. 7 is removed from the circuit board, the positive electrode terminal 21 and the negative electrode terminal 22 protrude from the battery body even when the positive electrode insertion terminal 21a and the negative electrode insertion terminal 22a are cut. Therefore, when this is put into a metal collection container, the positive electrode terminal 21 and the negative electrode terminal 22 are easily short-circuited.
[0008]
Further, in the case of a coin-shaped battery with a terminal, the battery can 35 serving as the positive electrode of the battery body and the sealing plate 36 serving as the negative electrode are all covered without being covered with the insulator, so that the positive electrode, the negative electrode It will be in the state which is easy to short-circuit between.
[0009]
Batteries used for mounting on circuit boards are mainly lithium batteries, which have a long lifespan and often leave discharge energy even after equipment using them is discarded. When the space is short-circuited with some metal object, a battery having a high energy density such as a lithium battery is likely to ignite or rupture with heat generation. In addition, since the electric double layer capacitor that is the subject of the invention disclosed in the aforementioned Japanese Patent Application Laid-Open No. 2000-243377 is a device mainly for power storage, the degree of remaining discharge energy is large, and the short-circuiting causes lithium to Problems similar to batteries occur.
[0010]
In a relatively large lithium battery, when the internal current rises abnormally due to a short-circuit prevention function such as shutting down the discharge circuit when a large current flows due to a short circuit or blocking an excessive discharge current, or due to a short circuit, the internal pressure is reduced. Functions such as a discharge valve that discharges to the outside are provided, but a small lithium battery that is mounted on a circuit board cannot have the functions described above, so a short circuit occurs in the disposal of discarded equipment. It is necessary to prevent it.
[0011]
An object of the present invention is to provide a battery with a terminal provided with a terminal structure for preventing a short circuit between a positive electrode and a negative electrode of a battery removed from a circuit board.
[0012]
[Means for Solving the Problems]
  In order to achieve the above object, the first invention of the present application is such that one end side is joined to the positive electrode and the negative electrode provided at both ends of the cylindrical battery body, and the other end is outside the projected area of the battery body in the cylindrical axis direction. In the battery with a terminal to which the positive electrode terminal and the negative electrode terminal are attached so as to be located at the position, the positive electrode terminal and the negative electrode terminal are located within the projected area from one end side to the other end side.A step having a rising portion is provided, and the rising portion is formed of an opening and a small width portion left on both sides of the opening with a small width.It is characterized by that.
[0013]
  When the battery with a terminal configured as described above is removed from the circuit board mounted with the disposal of the device in which it is used, the battery with a terminal can be easily removed from the circuit board by cutting the easily breakable portion with a cutting tool such as a nipper. Can be separated. When the removed battery with a terminal is put into a collection container or the like and mixed into a battery or metal object, if the terminal protrudes outside from the battery body, the positive electrode and the negative electrode of the battery are short-circuited by the metal. The probability increases, and in the case of a lithium battery, there is a risk of ignition or rupture due to a short circuit. However, since the easily breakable portion is within the projected area, the battery with a terminal whose terminal is cut does not protrude from the battery body, and the probability of a short circuit is greatly reduced. The danger from the battery is reduced.Further, according to the above configuration, when the battery with a terminal is taken out from the circuit board, the cutting edge of the cutting tool can be inserted into the easily breakable portion from a direction perpendicular to the surface of the circuit board. Even if an electronic component is mounted on the battery, there is no problem in the removal operation.
[0016]
  In addition, the second invention of the present application has one end joined to the positive electrode and the negative electrode respectively provided on the flat surfaces on both sides of the flat battery body,The positive electrode terminal and the negative electrode terminal are attached so that the other end side extends outside the projected area of the battery body, one terminal is attached in parallel to the flat surface, and the other terminal is bent at the other end side to Mounted so that it is flush with the terminalIn the battery with terminal
The other end of the one terminal has an easily breakable portion sandwiched between the opening and the cutouts on both sides thereof at a position removed from the battery body.
The other end of the other terminal has an easily breakable portion sandwiched between the opening and the notches on both sides at a position within the projected area of the battery body in the disk axial direction.It is characterized by that.
[0017]
  When the battery with a terminal configured as described above is removed from the circuit board mounted along with the disposal of the equipment in which it is used, the easily breakable portion is removed.From the direction perpendicular to the surface of the boardThe battery with terminals can be easily separated from the circuit board by cutting with a cutting tool such as a nipper. When the removed battery with a terminal is put into a collection container or the like and mixed into a battery or metal object, if the terminal protrudes outside from the battery body, the positive electrode and the negative electrode of the battery are short-circuited by the metal. The probability increases, and in the case of a lithium battery, there is a risk of ignition or explosion due to a short circuit,One terminal is battery after cuttingSince there is no protrusion of the terminal outside the main body and the probability of occurrence of a short circuit is greatly reduced, the risk of batteries during disposal is suppressed.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
[0021]
FIG. 1 shows a configuration of a battery A with a terminal according to the first embodiment, in which one end side of a positive electrode terminal 2 is joined to a positive electrode 1a of a battery body 1 configured as a cylindrical lithium primary battery, and a negative electrode 1b. One end side of the negative electrode terminal 3 is joined to each other, and the other end side of each of the positive electrode terminal 2 and the negative electrode terminal 3 is formed with a positive electrode insertion terminal 2a and a negative electrode insertion terminal 3a so as to be inserted into an insertion hole formed in the circuit board. The terminal-equipped battery A can be mounted on a circuit board.
[0022]
As shown in FIG. 2 (a), the positive electrode terminal 2 has a positive electrode joining surface 2b for welding to the positive electrode 1a of the battery body 1 at one end side and a cylindrical shaft of the battery body 1 at the other end side. Positive electrode insertion terminals 2a, 2a for insertion into the circuit board are formed at both ends that protrude outward from the projected area in the direction. In addition, an opening 2c is formed on the way from the positive electrode bonding surface 2b to the positive electrode insertion terminal 2a so that the formation position is within the projected area. By forming the opening 2c, the width is narrow on both sides. The easily breakable portion 2d is formed as the small width portion.
[0023]
Further, as shown in FIG. 2 (b), the negative electrode terminal 3 is formed with a negative electrode bonding surface 3b for welding to the negative electrode 1b of the battery body 1 on one end side, and on the other end side of the battery main body 1. A negative electrode insertion terminal 3a for insertion into the circuit board is formed outside the projected area in the cylindrical axis direction. In addition, an opening 3c is formed on the way from the negative electrode bonding surface 3b to the negative electrode insertion terminal 3a so that the formation position is within the projected area. By forming the opening 3c, the width is narrow on both sides thereof. An easily breakable portion 3d is formed. The negative electrode terminal 3 is formed with one negative electrode insertion terminal 3a, and the positive electrode terminal 2 is formed with two positive electrode insertion terminals 2a. Prevents wearing.
[0024]
When a device using the battery A with a terminal having the above configuration is disposed of due to a life or failure, the battery A with a terminal is removed from a circuit board equipped in the device, and a useful metal such as lithium is collected. To be served. In order to remove the battery A with a terminal, the easily breakable part 2d of the positive electrode terminal 2 and the easily breakable part 3d of the negative electrode terminal 3 are cut with a cutting tool such as a nipper to separate the battery A with terminal from the circuit board. Since the easily breakable portions 2d and 3d have a smaller width for forming the openings 2c and 3c, the easily breakable portions 2d and 3d can be easily cut, and the terminal A battery A can be taken out efficiently.
[0025]
Since the openings 2c and 3c are located within the cylindrical axial projection area of the battery body 1 by cutting the easily breakable portions 2d and 3d, the battery A ′ with terminal from which the positive electrode terminal 2 and the negative electrode terminal 3 have been cut is obtained. As shown in FIG. 3, the positive electrode terminal residue 2 ′ and the negative electrode terminal residue 3 ′ remain on both sides of the battery body 1 so as to be within the projected area. In this state, a state in which the positive electrode 1a and the negative electrode 1b of the battery body 1 are short-circuited by a metal object is unlikely to occur, and even if the discharge capacity remains in the removed battery A ′ with a terminal, ignition or rupture due to the short-circuiting occurs. Occurrence is greatly suppressed.
[0026]
In order to make the work for taking out the battery A with a terminal from the circuit board easier, in the battery B with a terminal according to the second embodiment shown in FIG. 4, easily breakable portions formed on the positive terminal 4 and the negative terminal 5. 4d and 5d are bulged outward. When the easily breakable portions 4d and 5d bulge outward in this manner, the cutting edge of the cutting tool can be sufficiently inserted into the easily breaking portions 4d and 5d, and further in the direction of inserting the cutting edge of the cutting tool. Since the degree of freedom increases, the workability of the cutting work is improved.
[0027]
Many other electronic components are mounted on the circuit board. In the case of the battery A with a terminal, if the electronic component is mounted beside the easily breakable portion 2d, it is an obstacle to cut the easily breakable portion 2d with a cutting tool. In some cases, it takes time and effort to first remove the electronic component that becomes an obstacle. In that respect, in the case of the battery B with a terminal, the range of the direction angle in which the cutting edge of the cutting tool is inserted is widened, and the workability of the removal is improved. Even so, it is inevitable that the electronic components mounted in the surrounding area become an obstacle to removal. If the cutting operation can be performed from the direction perpendicular to the surface of the circuit board, the cutting workability can be improved regardless of the mounting density of the electronic components. A configuration for realizing this will be described below as a third embodiment.
[0028]
FIG. 5A shows a configuration of a battery C with a terminal according to the third embodiment. The positive electrode terminal 6 and the negative electrode terminal 7 are stepped by bending, and an easily breakable portion 6d is formed at the rising portion of the step. , 7d are formed.
[0029]
The positive electrode terminal 6 is formed with a joining portion 6b to be joined to the positive electrode 1a of the battery body 1 by welding on one end side, and formed with a positive electrode insertion terminal 6a to be inserted into the circuit board on the other end side. By forming a step in the cylindrical projected area of the battery body 1 on the way to the side and forming an opening 6c at the rising portion of the step, easy breakable portions 6d that facilitate cutting are formed on both sides. Yes. On the other hand, as shown in FIG. 5 (b), the negative electrode terminal 7 has the same configuration as the positive electrode terminal 6, but the negative electrode terminal 7a to be inserted into the circuit board is one and the positive electrode and the negative electrode are reversely inserted. I'm trying not to be.
[0030]
According to the above configuration, when taking out the battery C with a terminal from the circuit board, the cutting edge of the cutting tool can be inserted into the easily breakable portions 6d and 7d from the direction perpendicular to the surface of the circuit board. Even if electronic components are mounted around C, there is no problem in the removal operation. Moreover, since the rising portions of the steps where the easily breakable portions 6d and 7d are formed are located within the projected area in the cylindrical axis direction of the battery body 1, the positive and negative terminals 6 and 7 are formed at the easily breakable portions 6d and 7d. The remaining pieces after cutting are not projected outward in the diameter direction of the battery body 1, and the fact that the projecting positive electrode terminal 6 and negative electrode terminal 7 are short-circuited by a metal object is greatly reduced.
[0031]
In the configuration in which a step is formed in the positive electrode terminal 8 and the negative electrode terminal 9 as in the battery D with a terminal shown in FIG. 6, the opening 8c can be formed on the positive electrode insertion terminal 8a side of the step. In this case, as shown in FIG. 6B, when the opening 8c is formed so as to be located within the projected area in the cylindrical axis direction of the battery body 1, the easily breakable portions 8d formed on both sides of the opening 8c. Is located within the projected area, and when it is cut, the remaining piece of the positive electrode terminal 8 does not protrude in the diameter direction of the battery body 1. By forming the negative electrode terminal 9 in the same manner, the probability of a short circuit between the positive electrode and the negative electrode of the battery with terminal D taken out from the circuit board is greatly reduced.
[0032]
Next, 5th-8th each embodiment applied to the battery with a terminal from which the shape of a battery main body differs is described with reference to FIGS. The batteries with terminals according to the fifth to eighth embodiments are obtained by attaching terminals for mounting on a circuit board to the positive electrode and the negative electrode of a flat battery body generally called a coin-type battery, respectively. .
[0033]
As shown in FIG. 8, the battery main body 31 configured as a coin-type battery accommodates a power generation element in a battery can 35 formed in a shallow bottomed cylindrical shape, and a gasket is provided in an opening of the battery can 35. The inside of the battery can 35 is sealed by caulking and fixing the sealing plate 36. Generally, the battery can 35 is configured as a positive electrode and the sealing plate 36 is configured as a negative electrode.
[0034]
As shown in FIG. 8, the battery E with a terminal according to the fifth embodiment using the battery main body 31 is joined to the battery can 35 by welding at one end side and provided with a positive electrode terminal 32. A negative electrode terminal 33 is provided by joining one end side by welding. The positive electrode terminal 32 and the negative electrode terminal 33 are each bent at 90 degrees in the middle from one end side to the other end side, and a narrow positive electrode insertion terminal 32d, so that the tip portion on the other end side can be inserted and mounted on the circuit board. It is formed on the negative electrode insertion terminal 33d.
[0035]
The positive terminal 32 is formed with easily breakable portions 32c and 32c sandwiched between the opening 32a and the notches 32b and 32b on both sides of the sealing plate 36 in the disc axial direction, closer to the battery can 35. Has been. Further, the negative electrode terminal 33 has an opening 33a and notches 33b on both sides thereof at positions closer to the central axis than the outer peripheral surface of the battery can 35 in the disk diameter direction so that the negative electrode terminal 33 is independently displayed in FIG. An easily breakable portion 33c sandwiched between 33b is formed.
[0036]
In the battery E with a terminal having the above-described configuration, the positive electrode insertion terminal 32d and the negative electrode insertion terminal 33d are inserted into insertion holes formed in a circuit board provided in a device using the same, and the positive electrode insertion terminal 32d and the negative electrode insertion are inserted. The terminal 33d is mounted on the circuit board by being soldered after being bent on the opposite side of the circuit board. When this equipment is disposed of due to its life or failure, the terminal-equipped battery E is removed from the circuit board and used for recovering useful metals such as lithium. In order to remove the terminal-equipped battery E from the circuit board, the easily breakable portion 32c of the positive electrode terminal 32 and the easily breakable portion 33c of the negative electrode terminal 33 are cut with a cutting tool such as a nipper to separate the battery E with terminal from the circuit board. The openings 32a and 33a and the notches 32b and 33b for forming the easily breakable portions 32c and 33c may be formed by round holes and arcs, but as shown in the figure, the openings 32a formed in square holes. 33a and the notches 32b and 33b with the corners opposed to the corners, the cutting position by the cutting tool is fixed and the cutting becomes easy.
[0037]
In the battery E with a terminal removed from the circuit board by cutting the easily breakable portions 32 c and 33 c, the positive electrode terminal 32 is within the height dimension range of the battery can 35 in the disk axial direction of the battery main body 31. In the diametrical direction, the negative electrode terminal 33 is located on the inner side of the outer peripheral surface of the battery can 35, so that a short circuit between the positive electrode and the negative electrode can be prevented even when the removed battery E with a terminal is put into a metal container. That is, as shown in FIG. 10, the terminal-equipped battery E ′ cut and removed by the easily breakable portions 32c and 33c is not connected to the sealing plate 36 even when grounded on the flat surface of the sealing plate 36 in the metal container M. There is no short circuit between the positive electrode terminal 32 and the metal container M. Similarly, as shown in FIG. 10, even when the metal can M is grounded on the outer peripheral surface of the battery can 35, the battery can 35 and the negative electrode terminal 33 are not short-circuited by the metal container. Therefore, even in the case where the life is long like a lithium battery and the discharge energy is left even after the device using the lithium battery is discarded, the terminal-equipped battery E is prevented from being ignited or ruptured by a short circuit between the positive electrode and the negative electrode. it can.
[0038]
In the battery E with a terminal shown in FIG. 8, since the positive electrode insertion terminal 32d of the positive electrode terminal 32 and the negative electrode insertion terminal 33d of the negative electrode terminal 33 have the same shape, they may be inserted in the circuit board in the opposite direction. . In order to prevent this, like the battery F with a terminal according to the sixth embodiment shown in FIG. 11, one terminal, here, the positive terminal 37d of the positive terminal 37 is formed on two legs, and Insertion can be prevented.
[0039]
Also in the case of this terminal-equipped battery F, the positive terminal 37 is provided with an opening 37a and notches 37b and 37b on both sides thereof to form easily breakable portions 37c and 37c. The negative electrode terminal 33 is the same as that of the battery E with a terminal shown in FIG. 9, and has the same configuration of the easily breakable portion 33c.
[0040]
FIG. 12 shows a configuration of a battery G with a terminal according to the seventh embodiment, and is configured so that the disk surface of the battery body 31 can be mounted in a vertical direction with respect to the circuit board. One end side of the battery can 35 serving as the positive electrode of the battery body 31 is joined by welding to attach the positive terminal 40, and one end side of the battery can 31 serving as the negative electrode of the battery body 31 is joined by welding. A negative electrode terminal 41 is attached. The other end side of the positive electrode terminal 40 extends out of the projected area of the battery body 31, and a positive electrode insertion terminal 40d is formed at a narrow width so that the positive electrode terminal 40 can be inserted and mounted in the insertion hole of the circuit board. The other end side of the negative electrode terminal 41 extends out of the projected area of the battery body 31, and a negative electrode insertion terminal 41d is formed at the tip so that the negative electrode terminal 41d can be inserted and mounted in the insertion hole of the circuit board. Yes. As illustrated, since the positive electrode insertion terminal 40d and the negative electrode insertion terminal 41d are formed to have different widths, it is possible to prevent the positive and negative electrodes from being reversely loaded on the circuit board.
[0041]
As shown in FIG. 12A, the positive terminal 40 is formed with easily breakable portions 40c and 40c sandwiched between an opening 40a and notches 40b and 40b on both sides thereof. The formation position of the easily breakable portion 40c may be an arbitrary position where the positive electrode terminal 40 can be easily cut.
[0042]
As shown in FIG. 12C, the negative terminal 41 is formed with easily breakable portions 41c and 41c sandwiched between an opening 41a and notches 41b and 41b on both sides thereof. The formation position of the easily breakable portion 41 c is formed at a position closer to the inner side than the outer peripheral surface of the battery can 35, that is, within a projected area in the disk axial direction of the battery body 31.
[0043]
In the terminal-equipped battery G having the above-described configuration, the positive electrode insertion terminal 40d and the negative electrode insertion terminal 41d are inserted into insertion holes formed in a circuit board provided in a device using the battery, and the positive electrode insertion terminal 40d and the negative electrode insertion are inserted. The terminal 41d is mounted on the circuit board by being bent after being bent on the opposite side of the circuit board and then soldered. When this equipment is disposed of due to its life or failure, the terminal-attached battery G is removed from the circuit board and used for recovering useful metals such as lithium. In order to remove the terminal-attached battery G from the circuit board, the easily breakable part 40c of the positive electrode terminal 40 and the easily breakable part 41c of the negative electrode terminal 41 are cut with a cutting tool such as a nipper to separate the battery G with terminal from the circuit board. The openings 40a, 41a and the notches 40b, 41b for forming the easily breakable portions 40c, 41c may be formed by round holes and arcs, but as shown in the figure, the openings 40a formed in square holes. , 41a and the notches 40b, 41b having the corners opposed to the corners, the cutting position by the cutting tool is fixed and the cutting becomes easy.
[0044]
The terminal-attached battery G removed from the circuit board by cutting the easily breakable portions 40c and 41c has the negative terminal 41 cut at the easily breakable portion 41c within the projected area of the battery main body 31, so the removed terminal When the attached battery G is put into the metal container, the battery can 35 and the negative electrode terminal 33 are short-circuited by the metal container even when grounded on the outer peripheral surface of the battery can 35 in the metal container. There is nothing. Therefore, even when the life of the battery such as a lithium battery is long and the discharge energy is left even after the device using the lithium battery is discarded, the terminal-equipped battery G is prevented from being ignited or ruptured by a short circuit between the positive electrode and the negative electrode. it can.
[0045]
FIG. 13 shows a configuration of a battery H with a terminal according to the eighth embodiment. The battery can 35 of the battery body 31 has a positive terminal 43 and the sealing plate 36 has a negative terminal 44 so that the battery can be surface-mounted. Is attached.
[0046]
One end side is joined to the flat surface of the battery can 35 constituting the battery body 31 by welding, and the positive terminal 43 is attached in parallel with the flat surface. The one end side is welded to the flat surface of the sealing plate 36. The other end side of the negative electrode terminal 44 joined by bending is attached by bending so that the other end side is located on the same plane as the positive electrode terminal 43.
[0047]
The positive terminal 43 is sandwiched between the opening 43a and the notches 43b and 43b on both sides of the positive terminal 43 at a position where it can be easily disconnected from the terminal-equipped battery H mounted on the circuit board, that is, a position removed from the battery body 31. An easily breakable portion 43c is formed. The negative electrode terminal 44 is formed with an easily breakable portion 44c sandwiched between the opening 44a and the notches 44b and 44b on both sides thereof at a position within the projected area of the battery body 31 in the disc axial direction. .
[0048]
The terminal-equipped battery H having the above-described configuration is disposed on the surface of a circuit board provided in a device using the battery, and the other end of the positive terminal 43 and the other end of the negative terminal 44 are arranged on the circuit board. Surface mounting is performed by soldering to the land. When this device is disposed of due to its life or failure, the terminal-attached battery H is removed from the circuit board and used for recovering useful metals such as lithium. In order to remove the terminal-equipped battery H from the circuit board, the easily breakable portion 43c of the positive electrode terminal 43 and the easily breakable portion 44c of the negative electrode terminal 44 are cut with a cutting tool such as a nipper to separate the battery H with terminal from the circuit board. The openings 43a, 44a and the notches 43b, 44b for forming the easily breakable portions 43c, 44c may be formed by round holes and arcs, but as shown in the figure, the openings 43a formed in square holes. 44a and the notches 43b and 44b with the corners opposed to the corners, the cutting position by the cutting tool is fixed and the cutting becomes easy.
[0049]
The battery H with a terminal removed from the circuit board by cutting the easily breakable portions 43c and 44c is disconnected at the easily breakable portion 44c in which the negative electrode terminal 44 is within the projected area of the battery body 31. When the attached battery H is inserted into the metal container, the battery can 35 and the negative electrode terminal 44 are short-circuited by the metal container even when the battery can be grounded on the outer peripheral surface of the battery can 35 in the metal container. There is nothing. Therefore, even in the case where the life is long like a lithium battery and the discharge energy is left even after the device using the lithium battery is discarded, the battery H with terminal is prevented from being ignited or ruptured due to a short circuit between the positive electrode and the negative electrode. it can.
[0050]
In each of the embodiments described above, a cutting site is specified for a battery with a terminal having a circular cross-sectional shape, but the same can be configured when the cross-sectional shape is a quadrangle or the like.
[0051]
【The invention's effect】
As described above, according to the present invention, it is easy to take out a battery with a terminal mounted on a circuit board to be disposed of from the circuit board, and the metal between the positive electrode and the negative electrode of the taken out battery with a terminal is metal. The state of being short-circuited by an object is remarkably reduced, and an unexpected accident due to a short-circuit can be prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a battery with a terminal according to a first embodiment.
FIG. 2 is a plan view showing a configuration of a positive electrode terminal (a) and a negative electrode terminal (b) in the above configuration.
FIG. 3 is a perspective view showing a state where an easily breakable portion is cut in the same configuration.
FIG. 4 is a perspective view showing a configuration of a battery with a terminal according to a second embodiment.
5A is a perspective view illustrating a configuration of a battery with a terminal according to a third embodiment, and FIG. 5B is a perspective view illustrating a configuration of a negative electrode terminal.
6A is a perspective view illustrating a configuration of a battery with a terminal according to a fourth embodiment, and FIG. 6B is a plan view illustrating a configuration of a positive electrode terminal.
FIG. 7 is a perspective view showing a configuration of a battery with a terminal according to a conventional technique.
FIGS. 8A and 8E are plan views and FIGS. 8B to 8D are side views showing the configuration of a battery with a terminal according to a fifth embodiment. FIGS.
FIG. 9 is a perspective view illustrating a configuration of a negative electrode terminal.
FIG. 10 is an explanatory diagram illustrating a state where no short circuit occurs.
11A and 11B are plan views and FIGS. 11B and 11D are side views showing the configuration of a battery with a terminal according to a sixth embodiment.
12A and 12C are plan views and FIGS. 12B and 12D are side views showing the configuration of a battery with a terminal according to a seventh embodiment.
13A and 13C are plan views and FIGS. 13B and 13D are side views showing the configuration of a battery with a terminal according to an eighth embodiment.
14 (a) and 14 (c) are plan views and FIG. 14 (b) is a side view showing a configuration of a battery with a terminal according to a conventional technique.
[Explanation of symbols]
1,31 Battery body
2, 4, 6, 8, 32, 37, 40, 43 Positive terminal
3, 5, 7, 9, 33, 41, 44 Negative terminal
2c-8c, 32a, 33a, 37a, 40a, 41a, 43a, 44a Opening
2d-8d, 32c, 33c, 37c, 40c, 41c, 43c, 44c
32b, 33b, 37b, 40b, 41b, 43b, 44b Notch

Claims

A positive electrode terminal and a negative electrode terminal are attached so that one end side is joined to the positive electrode and the negative electrode provided at both ends of the battery body formed in a cylindrical shape, and the other end side is located outside the projected area in the cylindrical axis direction of the battery main body. In the battery with terminal
The positive electrode terminal and the negative electrode terminal are provided with a step having a rising portion at a position within the projected area from the one end side to the other end side ,
The battery with a terminal, wherein the rising portion is formed of an opening and a small width portion left on both sides of the opening with a small width .

A positive electrode terminal and a negative electrode terminal are attached so that one end side is bonded to the positive electrode and the negative electrode respectively provided on the flat surfaces on both sides of the flat battery body, and the other end extends outside the projected area of the battery main body. One terminal is attached parallel to the flat surface, and the other terminal is attached so that the other end is bent and located on the same plane as the one terminal ,
The other end of the one terminal has an easily breakable portion sandwiched between the opening and the cutouts on both sides thereof at a position removed from the battery body.
The other end of the other terminal has an easily breakable portion sandwiched between the opening and the cutouts on both sides thereof at a position within the projected area of the battery body in the disk axial direction. Battery with terminal.