JP3619903B2 - Sealed electrode terminal structure - Google Patents

Sealed electrode terminal structure Download PDF

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JP3619903B2
JP3619903B2 JP03790494A JP3790494A JP3619903B2 JP 3619903 B2 JP3619903 B2 JP 3619903B2 JP 03790494 A JP03790494 A JP 03790494A JP 3790494 A JP3790494 A JP 3790494A JP 3619903 B2 JP3619903 B2 JP 3619903B2
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hole
outer container
battery outer
synthetic resin
insulating film
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JPH07226198A (en
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正隆 山下
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株式会社エイ・ティーバッテリー
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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

Description

【０００１】
【産業上の利用分野】
本発明は、密閉型電池における電池外装容器を貫通して配設される正極若しくは負極の端子構造に係り、特に絶縁性、気密性に優れるとともに電極端子が特殊な材料に限定されることのない封止電極端子構造に関する。
【０００２】
【従来の技術】
最近、携帯電話、携帯用ノートパソコン、ビデオムービー等の小型でコードレスで用いられる携帯用電子機器がめざましく普及している。そして、このような機器には、小型で高容量化が図れるリチウム電池やリチウムイオン二次電池等の非水系電解液の電池が多く用いられてきている。
【０００３】
【発明が解決しようとする課題】
しかしながら、このような非水系電解液の電池にあっては、その高い起電力に起因し正極端子の材質としてはチタン、モリブデン等を含有する特殊なステンレス、金、白金、アルミニウム等の限られた材料しか用いることができなかった。特に、この正極端子が電池蓋若しくは電池缶からなる電池外装容器を貫通して配設され、高い密閉性を求められる融着ガラスを用いるハーメチックシール方式の電池にあっては、電極端子の材料は融着ガラスの熱膨張係数と近い値であることが必要であり、このことからチタン、モリブデン等を含有する特殊なステンレス等にその材料が限定されていた。
【０００４】
しかし、このチタン、特殊なステンレスはいずれも加工性及び溶接性に大きな難点があるとともに、高価であった。
【０００５】
そこで、本発明にあっては、加工性及び溶接性に問題があり且つ高価なチタン、特殊なステンレスを用いることなく、例えば正極端子であれば加工性に優れ且つ廉価なアルミニウム若しくはアルミニウム合金を、また負極端子であれば銅、ニッケル、ニッケルメッキを施した鉄、ＳＵＳ３０４，ＳＵＳ４３０等の汎用ステンレス等を用いることが可能であるとともに、高い密閉性が得られる封止電極端子構造を実現することを目的とする。
【０００６】
【課題を解決するための手段】
上述した目的を達成すべく、本発明の封止電極端子構造は、電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の両面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる絶縁フィルムと、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製封止ピンとからなり、前記合成樹脂製筒体は少なくとも前記電池外装容器に穿設された前記孔部の長さと前記両面に配設された絶縁フィルムの厚さを加えた長さ以上を有し、前記合成樹脂製筒体の孔部と絶縁フィルムの孔部を挿通し前記電池外装容器の孔部から突出する前記金属製封止ピンの柱状部の他端をかしめることにより、金属製封止ピンの両端間で絶縁フィルム、合成樹脂製筒体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことを特徴とするものである。
【０００７】
また、電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の両面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる絶縁フィルムと、この一方の絶縁フィルムの外面に孔部を連通して配置されたワッシャー体と、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製封止ピンとからなり、前記合成樹脂製筒体は少なくとも前記電池外装容器に穿設された前記孔部の長さと前記両面に配設された絶縁フィルムの厚さを加えた長さ以上を有し、前記合成樹脂製筒体の孔部と絶縁フィルムの孔部とワッシャー体を挿通し前記電池外装容器の孔部から突出する前記金属製封止ピンの柱状部の他端をかしめることにより、金属製封止ピンの両端間で絶縁フィルム、合成樹脂製筒体、ワッシャー体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことを特徴とするものである。
【０００８】
また、電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の一方面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる第１の絶縁フィルムと、前記電池外装容器の孔部に対応する部分に孔部を穿設し電池外装容器の他方面に配置された第２の絶縁フィルムとワッシャー体との積層体と、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製電極ピンとからなり、前記合成樹脂製筒体は少なくとも前記電池外装容器に穿設された前記孔部の長さと前記両面に配設された絶縁フィルムの厚さを加えた長さ以上を有し、前記合成樹脂製筒体の孔部と積層体の孔部を挿通し前記電池外装容器の孔部から突出する前記金属製電極ピンの柱状部の他端をかしめることにより、金属製電極ピンの両端間で第１の絶縁フィルム、合成樹脂製筒体、積層体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことを特徴とするものである。
【０００９】
【作用】
電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の両面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる絶縁フィルムと、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製封止ピンとからなり、前記合成樹脂製筒体の孔部と絶縁フィルムの孔部を挿通し前記電池外装容器の孔部から突出する前記金属製封止ピンの柱状部の他端をかしめることにより、金属製封止ピンの両端間で絶縁フィルム、合成樹脂製筒体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことで、本発明の封止電極端子構造は電極端子の材料が限定されてしまう従来の融着ガラスによる封止構造を用いることなく電池外装容器に対して確実に絶縁されるとともに、電池外装容器の孔部を優れた気密性で封止することができる。
【００１０】
また、電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の両面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる絶縁フィルムと、この一方の絶縁フィルムの外面に孔部を連通して配置されたワッシャー体と、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製封止ピンとからなり、前記合成樹脂製筒体の孔部と絶縁フィルムの孔部とワッシャー体を挿通し前記電池外装容器の孔部から突出する前記金属製封止ピンの柱状部の他端をかしめることにより、金属製封止ピンの両端間で絶縁フィルム、合成樹脂製筒体、ワッシャー体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことで、本発明の封止電極端子構造は電極端子の材料が限定されてしまう従来の融着ガラスによる封止構造を用いることなく電池外装容器に対して確実に絶縁されるとともに、電池外装容器の孔部を優れた気密性で封止することができる。
【００１１】
また、電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の一方面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる第１の絶縁フィルムと、前記電池外装容器の孔部に対応する部分に孔部を穿設し電池外装容器の他方面に配置された第２の絶縁フィルムとワッシャー体との積層体と、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製電極ピンとからなり、前記合成樹脂製筒体の孔部と積層体の孔部を挿通し前記電池外装容器の孔部から突出する前記金属製電極ピンの柱状部の他端をかしめることにより、金属製電極ピンの両端間で第１の絶縁フィルム、合成樹脂製筒体、積層体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことで、本発明の封止電極端子構造は電極端子の材料が限定されてしまう従来の融着ガラスによる封止構造を用いることなく電池外装容器に対して確実に絶縁されるとともに、電池外装容器の孔部を優れた気密性で封止することができる。
【００１２】
【実施例】
図１は、本発明の封止電極端子構造の第１の実施例を示す分解図、図２は組立て状態の断面図であり、１は本発明の封止電極端子構造、２は柱状部２ａの上端に鍔縁２ｂを形成した電極ピン、３はポリパラフェニレンテレフタルアミド（ＰＰＴＡアラミド）、ポリイミド等からなる高強度で、耐熱性、耐薬品性に優れた絶縁フィルム、４は孔部４ａを設けたポリテトラフルオロエチレンからなる絶縁性を有する合成樹脂製筒体、５は貫通孔６を穿設した電池蓋若しくは電池缶からなる電池外装容器である。
【００１３】
電極ピン２は、その柱状部２ａの外径を電池外装容器５の貫通孔６よりも小さく且つ合成樹脂製筒体４の孔部４ａ内径と略同一か若干小さくするとともに、柱状部２ａの長さを電池外装容器５と絶縁フィルム３の２枚分を加えた厚さをよりも大きくする。また、鍔縁２ｂの外径は貫通孔６よりも大きいものとする。また、電極ピン２の先端部分は、かしめ易いように略円錐形状に凹陥させている。
【００１４】
電池を非水系電解液のリチウム電池やリチウムイオン二次電池とすると、電極ピン２を正極とした場合には、電極ピン２の材質としてはアルミニウム、アルミニウム合金、チタニウムが好適であり、特にアルミニウムやアルミニウム合金は加工性、溶接性に優れるとともに廉価であることから最適である。そして、負極となる電池外装容器５の材質をステンレス、ニッケルメッキ鋼板等とする。また、電極ピン２を負極とした場合には、電極ピン２の材質としては加工性、溶接性に優れた銅、ニッケルメッキを施した鉄、軟質のステンレスが好適であり、ステンレスのなかでも、ＳＵＳ３０４，ＳＵＳ４３０，ＳＵＳ３０５等の汎用品が使用できる。このとき、正極となる電池外装容器５の材質はアルミニウム、アルミニウム合金とする。
【００１５】
絶縁フィルム３は、ポリパラフェニレンテレフタルアミド（ＰＰＴＡアラミド）若しくはポリイミドをフィルム状としたもので、耐熱性、耐薬品性、絶縁性に優れるとともに、数〜数十μｍという薄さであっても高強度で優れた機械的特性を発揮し得るものである。そして、電池外装容器５の貫通孔６に対応する部分に電池外装容器５の貫通孔６よりも若干大きめの孔部３ａを穿設し、この絶縁フィルム３を電池外装容器５の両面に配設する。
【００１６】
合成樹脂製筒体４は、外径を電池外装容器５の貫通孔６の幅径と略同一とし、その長さは電池外装容器５と絶縁フィルム３を２枚分加えた厚さと略同一か若しくは若干大きく、且つ電極ピン２の柱状部２ａの長さよりも短くする。そして、電池外装容器５の貫通孔６に合成樹脂製筒体４を挿入配置する。その材質としては、フッ化ポリエチレン、ポリエチレン、ポリプロピレン、ポリアミド、シリコーン樹脂等の合成樹脂、若しくはエラストマー等でよい。耐侯性、耐電解液性、シール性、機械特性等を考慮のうえ選定する。もちろん、ポリマーアロイ化、変性して用いてもよい。
【００１７】
更に、電極ピン２の柱状部２ａが合成樹脂製筒体４の孔部４ａと絶縁フィルム３の孔部３ａを挿通し、合成樹脂製筒体４の下端から柱状部２ａを突出させる。この状態で突出した電極ピン２の柱状部２ａをかしめ、金属製封止ピン２の両端間で絶縁フィルム３、合成樹脂製筒体４及び電池外装容器５を圧接挟持する。かしめ方法として、インパクトに限らずプレス、冷間揺動プレス等であってもよい。これにより、図２に示す如く、本発明の封止電極端子構造１が、電極ピン２を電池外装容器５から確実に絶縁しつつ貫通孔６を気密封止していることがわかる。
【００１８】
図３、図４は、本発明の封止電極端子構造の第２の実施例を示し、この封止電極端子構造１は、前述した第１の実施例の封止電極端子構造に、貫通孔６を連通するワッシャー体７を追加したものである。このワッシャー体７は、電極ピン２をかしめたことで生じる尖鋭なかえりにより破断することのない強度を有するもので、電気的絶縁物が好適であるが、絶縁フィルム３と併用することから導電性を有する金属であってもよい。
【００１９】
このワッシャー体７を、かしめる側の絶縁フィルム３の外方に配置する。そして、金属製封止ピン２の柱状部２ａが合成樹脂製筒体４の孔部４ａと絶縁フィルム３の孔部３ａとワッシャー体７を挿通し、貫通孔６から突出した金属製封止ピン２の柱状部２ａの先端をかしめることで、図４に示す如く、金属製封止ピン２の両端間で絶縁フィルム３、合成樹脂製筒体４、ワッシャー体７及び電池外装容器５を圧接挟持する。
【００２０】
図５、図６は、本発明の封止電極端子構造の第３の実施例を示し、この封止電極端子構造１は、第２の実施例におけるワッシャー体７に予めフッ化ポリエチレン等熱可塑性の樹脂、アクリル、シリコーン、天然ゴム等の粘着剤、エポキシ、シリコーン等の接着剤を用いて絶縁フィルム３を被着させてなる積層体８を用いるもので、ワッシャー体７を外方に位置させる。そして、金属製封止ピン２の柱状部２ａが合成樹脂製筒体４の孔部４ａと絶縁フィルム３の孔部３ａと積層体８の孔部８ａを挿通し、貫通孔６から突出した金属製封止ピン２の柱状部２ａの先端をかしめることで、図６に示す如く、金属製封止ピン２の両端間で絶縁フィルム３、合成樹脂製筒体４、積層体８及び電池外装容器５を圧接挟持する。
【００２１】
【発明の効果】
以上詳述した如く、本発明の封止電極端子構造によれば、電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の両面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる絶縁フィルムと、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製金属製封止ピンとからなり、前記合成樹脂製筒体の孔部と絶縁フィルムの孔部を挿通し前記電池外装容器の孔部から突出する前記金属製金属製封止ピンの柱状部の他端をかしめることにより、金属製金属製封止ピンの両端間で絶縁フィルム、合成樹脂製筒体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことにより、本発明の封止電極端子構造は電極端子の材料が限定されてしまう従来の融着ガラスによる封止構造を用いることなく電池外装容器に対して確実に絶縁されるとともに、電池外装容器の孔部を優れた気密性で封止することができる。
【００２２】
また、電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の両面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる絶縁フィルムと、この一方の絶縁フィルムの外面に孔部を連通して配置されたワッシャー体と、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製封止ピンとからなり、前記合成樹脂製筒体の孔部と絶縁フィルムの孔部とワッシャー体を挿通し前記電池外装容器の孔部から突出する前記金属製封止ピンの柱状部の他端をかしめることにより、金属製封止ピンの両端間で絶縁フィルム、合成樹脂製筒体、ワッシャー体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことにより、本発明の封止電極端子構造は電極端子の材料が限定されてしまう従来の融着ガラスによる封止構造を用いることなく電池外装容器に対して確実に絶縁されるとともに、電池外装容器の孔部を優れた気密性で封止することができる。
【００２３】
更に、電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の一方面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる第１の絶縁フィルムと、前記電池外装容器の孔部に対応する部分に孔部を穿設し電池外装容器の他方面に配置された第２の絶縁フィルムとワッシャー体との積層体と、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製電極ピンとからなり、前記合成樹脂製筒体の孔部と積層体の孔部を挿通し前記電池外装容器の孔部から突出する前記金属製電極ピンの柱状部の他端をかしめることにより、金属製電極ピンの両端間で第１の絶縁フィルム、合成樹脂製筒体、積層体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことにより、本発明の封止電極端子構造は電極端子の材料が限定されてしまう従来の融着ガラスによる封止構造を用いることなく電池外装容器に対して確実に絶縁されるとともに、電池外装容器の孔部を優れた気密性で封止することができる。
【００２４】
したがって、リチウム電池やリチウムイオン二次電池等の非水系電解液の電池にあっては、高い密閉性を求められる場合に従来融着ガラスによる封止構造を用いることで電極ピンの材質を加工性及び溶接性に問題があり且つ高価なチタン、特殊なステンレスとすることが余儀なくされていたが、本発明の封止電極端子構造は、チタン、特殊なステンレスを用いることなく、例えば正極端子であれば加工性に優れ且つ廉価なアルミニウム若しくはアルミニウム合金を、また負極端子であれば銅等を用いることが可能となるものである。
【図面の簡単な説明】
【図１】本発明の封止電極端子構造の第１の実施例の分解図である。
【図２】本発明の封止電極端子構造の第１の実施例の組立て状態の断面図である。
【図３】本発明の封止電極端子構造の第２の実施例の分解図である。
【図４】本発明の封止電極端子構造の第２の実施例の組立て状態の断面図である。
【図５】本発明の封止電極端子構造の第３の実施例の分解図である。
【図６】本発明の封止電極端子構造の第３の実施例の組立て状態の断面図である。
【符号の説明】
１ 封止電極端子構造
２ 電極ピン
３ 絶縁フィルム
３ａ 孔部
４ 合成樹脂製筒体
４ａ 孔部
５ 電池外装容器
６ 貫通孔
７ ワッシャー体
８ 積層体
８ａ 孔部[0001]
[Industrial application fields]
The present invention relates to a terminal structure of a positive electrode or a negative electrode disposed through a battery outer casing in a sealed battery, and is particularly excellent in insulation and airtightness, and the electrode terminal is not limited to a special material. The present invention relates to a sealing electrode terminal structure.
[0002]
[Prior art]
Recently, small and cordless portable electronic devices such as mobile phones, portable notebook computers, and video movies have been remarkably widespread. In such devices, batteries of non-aqueous electrolyte solutions such as lithium batteries and lithium ion secondary batteries that are small in size and high in capacity have been used.
[0003]
[Problems to be solved by the invention]
However, in such a non-aqueous electrolyte battery, due to its high electromotive force, the material of the positive electrode terminal is limited to special stainless steel containing titanium, molybdenum, etc., gold, platinum, aluminum, etc. Only materials could be used. In particular, in the case of a hermetic seal type battery using a fused glass in which this positive electrode terminal is disposed through a battery outer casing made of a battery lid or a battery can and requires high sealing performance, the material of the electrode terminal is It is necessary to have a value close to the coefficient of thermal expansion of the fused glass, and from this, the material is limited to special stainless steel containing titanium, molybdenum and the like.
[0004]
However, both the titanium and the special stainless steel have a great difficulty in workability and weldability and are expensive.
[0005]
Therefore, in the present invention, there is a problem in workability and weldability, and without using expensive titanium and special stainless steel, for example, if it is a positive electrode terminal, an aluminum or aluminum alloy that is excellent in workability and inexpensive, In addition, as long as it is a negative electrode terminal, it is possible to use copper, nickel, nickel-plated iron, general-purpose stainless steel such as SUS304, SUS430, and the like, and to realize a sealed electrode terminal structure with high sealing performance. Objective.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the sealed electrode terminal structure of the present invention is disposed on both surfaces of the synthetic resin cylindrical body housed in the hole formed in the battery outer container and the battery outer container. An insulating film formed by drilling a hole in a portion corresponding to the hole of the battery outer casing, and a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder It is composed of a metal sealing pin, and the synthetic resin cylindrical body has at least a length obtained by adding at least the length of the hole formed in the battery outer casing and the thickness of the insulating film disposed on the both surfaces. has, by caulking the other end of the columnar portion of the metallic sealing pin projecting from the hole of the inserted through holes of the insulating film and the hole portion of the synthetic resin tubular body wherein cell outer container, metal Press the insulating film, synthetic resin cylinder, and battery case between both ends of the sealing pin. It is characterized in that the hermetically sealed hole of the battery outer container to clamp.
[0007]
In addition, a synthetic resin cylindrical body housed in a hole formed in the battery outer container, and a hole formed in both sides of the battery outer container corresponding to the hole of the battery outer container. An insulating film formed, a washer body arranged with a hole communicating with the outer surface of the one insulating film, and one end of a columnar section having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder The synthetic resin cylinder includes at least the length of the hole formed in the battery outer casing and the thickness of the insulating film provided on both sides. Other than the columnar portion of the metal sealing pin that has a length equal to or longer than the hole of the synthetic resin cylindrical body, the hole of the insulating film, and the washer body and protrudes from the hole of the battery outer casing. Insulating film between both ends of metal sealing pin by caulking the end Synthetic resin tubular body, in which the washer body and the battery outer vessel was nipped characterized in that hermetically sealed hole of the battery outer case.
[0008]
Further, a synthetic resin cylindrical body housed in a hole formed in the battery outer container, and a hole in a portion corresponding to the hole of the battery outer container disposed on one surface of the battery outer container. A first insulating film formed by perforation, a second insulating film formed in a portion corresponding to the hole of the battery outer container and disposed on the other surface of the battery outer container, and a washer body. The laminate and a metal electrode pin provided with a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder , and the synthetic resin cylinder is at least attached to the battery outer container It has a length equal to or greater than the length of the hole formed and the thickness of the insulating film disposed on both surfaces, and is inserted through the hole of the synthetic resin cylinder and the hole of the laminate. The other end of the columnar part of the metal electrode pin protruding from the hole of the battery outer case is caulked. Thus, the first insulating film, the synthetic resin cylindrical body, the laminate, and the battery outer container are pressed and sandwiched between both ends of the metal electrode pin to hermetically seal the hole of the battery outer container. Is.
[0009]
[Action]
A synthetic resin cylindrical body housed in a hole formed in the battery outer container and a hole formed in a portion corresponding to the hole of the battery outer container disposed on both surfaces of the battery outer container. And a metal sealing pin provided with a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder, and a hole portion of the synthetic resin cylinder Insulating film and synthetic resin between both ends of the metal sealing pin by caulking the other end of the columnar portion of the metal sealing pin that passes through the hole of the insulating film and protrudes from the hole of the battery outer casing The sealed electrode terminal structure of the present invention is limited in the material of the electrode terminal by sandwiching the cylindrical body and the battery outer container in pressure contact and hermetically sealing the hole of the battery outer container. Reliable insulation against battery outer packaging without using a sealing structure Rutotomoni, can be sealed with excellent airtightness the hole of the battery outer case.
[0010]
In addition, a synthetic resin cylindrical body housed in a hole formed in the battery outer container, and a hole formed in both sides of the battery outer container corresponding to the hole of the battery outer container. An insulating film formed, a washer body arranged with a hole communicating with the outer surface of the one insulating film, and one end of a columnar section having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder The metal sealing pin comprising a metal sealing pin provided with a flange, passing through the hole of the synthetic resin cylinder, the hole of the insulating film, and the washer, and protruding from the hole of the battery outer casing By caulking the other end of the columnar portion, the insulating film, the synthetic resin cylinder, the washer body, and the battery outer container are pressed and sandwiched between the both ends of the metal sealing pin to open the hole of the battery outer container. By sealing hermetically, the sealed electrode terminal structure of the present invention has an electrode end. It is possible to reliably insulate the battery outer container without using a conventional sealing structure made of fused glass that limits the material, and to seal the hole of the battery outer container with excellent airtightness. it can.
[0011]
Further, a synthetic resin cylindrical body housed in a hole formed in the battery outer container, and a hole in a portion corresponding to the hole of the battery outer container disposed on one surface of the battery outer container. A first insulating film formed by perforation, a second insulating film formed in a portion corresponding to the hole of the battery outer container and disposed on the other surface of the battery outer container, and a washer body. A laminate and a metal electrode pin having a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder, and the hole of the synthetic resin cylinder and the laminate A first insulating film and a synthetic resin cylinder are inserted between both ends of the metal electrode pin by caulking the other end of the columnar portion of the metal electrode pin that passes through the hole and protrudes from the hole of the battery outer casing. The hole of the battery outer container is hermetically sealed by pressing the body, the laminate and the battery outer container. Thus, the sealing electrode terminal structure of the present invention is reliably insulated from the battery outer casing without using the conventional sealing structure made of fused glass that limits the material of the electrode terminal, and the battery outer casing The hole of the container can be sealed with excellent airtightness.
[0012]
【Example】
FIG. 1 is an exploded view showing a first embodiment of the sealing electrode terminal structure of the present invention, FIG. 2 is a sectional view in an assembled state, 1 is the sealing electrode terminal structure of the present invention, and 2 is a columnar portion 2a. An electrode pin having a flange 2b formed on the upper end thereof, 3 is an insulating film made of polyparaphenylene terephthalamide (PPTA aramid), polyimide, etc., having high strength, excellent heat resistance and chemical resistance, and 4 has a hole 4a. The provided synthetic resin cylinder 5 made of polytetrafluoroethylene and having insulating properties is a battery outer casing made of a battery lid or a battery can having a through hole 6 formed therein.
[0013]
The electrode pin 2 has an outer diameter of the columnar portion 2a smaller than the through hole 6 of the battery outer casing 5 and substantially the same as or slightly smaller than the inner diameter of the hole 4a of the synthetic resin cylindrical body 4, and the length of the columnar portion 2a. Then, the thickness of the battery outer case 5 and the insulating film 3 is increased. In addition, the outer diameter of the flange edge 2 b is larger than that of the through hole 6. The tip portion of the electrode pin 2 is recessed in a substantially conical shape so that it can be easily caulked.
[0014]
When the battery is a non-aqueous electrolyte lithium battery or lithium ion secondary battery, when the electrode pin 2 is a positive electrode, the material of the electrode pin 2 is preferably aluminum, an aluminum alloy, or titanium. Aluminum alloys are optimal because they are excellent in workability and weldability and are inexpensive. The material of the battery outer casing 5 serving as the negative electrode is stainless steel, nickel-plated steel plate, or the like. In addition, when the electrode pin 2 is a negative electrode, the electrode pin 2 is preferably made of copper, nickel-plated iron, and soft stainless steel, which are excellent in workability and weldability. General-purpose products such as SUS304, SUS430, and SUS305 can be used. At this time, the material of the battery outer casing 5 serving as the positive electrode is aluminum or an aluminum alloy.
[0015]
The insulating film 3 is a film made of polyparaphenylene terephthalamide (PPTA aramid) or polyimide, and is excellent in heat resistance, chemical resistance, and insulation, and even if it is as thin as several to several tens of μm. It can exhibit excellent mechanical properties in strength. Then, a hole 3 a slightly larger than the through hole 6 of the battery outer container 5 is formed in a portion corresponding to the through hole 6 of the battery outer container 5, and the insulating film 3 is disposed on both surfaces of the battery outer container 5. To do.
[0016]
Is the outer diameter of the synthetic resin cylinder 4 substantially the same as the width of the through-hole 6 of the battery outer container 5 and is the length substantially the same as the thickness of the two battery outer containers 5 and the insulating film 3 added? Alternatively, it is slightly larger and shorter than the length of the columnar portion 2a of the electrode pin 2. Then, the synthetic resin cylinder 4 is inserted and disposed in the through hole 6 of the battery outer container 5. The material may be synthetic resin such as fluorinated polyethylene, polyethylene, polypropylene, polyamide, silicone resin, or elastomer. Select in consideration of weather resistance, electrolyte resistance, sealing properties, mechanical properties, etc. Of course, it may be used after polymer alloying or modification .
[0017]
Further, the columnar part 2 a of the electrode pin 2 is inserted through the hole 4 a of the synthetic resin cylinder 4 and the hole 3 a of the insulating film 3, and the columnar part 2 a is protruded from the lower end of the synthetic resin cylinder 4. The columnar portion 2 a of the electrode pin 2 protruding in this state is caulked, and the insulating film 3, the synthetic resin cylinder 4, and the battery outer casing 5 are pressed and sandwiched between both ends of the metal sealing pin 2. The caulking method is not limited to impact, and may be a press, a cold rocking press, or the like. 2, it can be seen that the sealed electrode terminal structure 1 of the present invention hermetically seals the through-hole 6 while reliably insulating the electrode pin 2 from the battery outer casing 5.
[0018]
3 and 4 show a second embodiment of the sealing electrode terminal structure of the present invention, and this sealing electrode terminal structure 1 has a through hole in the sealing electrode terminal structure of the first embodiment described above. 6. A washer body 7 that communicates 6 is added. The washer body 7 has a strength that does not break due to the sharp burr generated by caulking the electrode pin 2, and is preferably an electrical insulator, but is electrically conductive because it is used in combination with the insulating film 3. The metal which has this may be sufficient.
[0019]
This washer body 7 is arranged outside the insulating film 3 on the caulking side. The columnar portion 2a of the metal sealing pin 2 passes through the hole 4a of the synthetic resin cylinder 4, the hole 3a of the insulating film 3, and the washer body 7, and protrudes from the through hole 6. 4, the insulating film 3, the synthetic resin cylinder 4, the washer body 7, and the battery outer container 5 are pressed between the both ends of the metal sealing pin 2 as shown in FIG. Hold it.
[0020]
5 and 6 show a third embodiment of the sealing electrode terminal structure of the present invention. This sealing electrode terminal structure 1 is preliminarily made of thermoplastic such as fluorinated polyethylene on the washer body 7 in the second embodiment. A laminate 8 formed by adhering the insulating film 3 using an adhesive such as resin, acrylic, silicone, natural rubber, or an adhesive such as epoxy, silicone, and the washer body 7 is positioned outward. . The columnar portion 2a of the metal sealing pin 2 is inserted through the hole portion 4a of the synthetic resin cylinder 4, the hole portion 3a of the insulating film 3, and the hole portion 8a of the laminated body 8, and protrudes from the through hole 6. By crimping the ends of the columnar portions 2a of the sealing pins 2, the insulating film 3, the synthetic resin cylinder 4, the laminate 8 and the battery exterior are provided between both ends of the metal sealing pins 2, as shown in FIG. The container 5 is clamped.
[0021]
【The invention's effect】
As described above in detail, according to the sealed electrode terminal structure of the present invention, the synthetic resin cylindrical body housed in the hole formed in the battery outer container and the both surfaces of the battery outer container are disposed. An insulating film formed by drilling a hole in a portion corresponding to the hole of the battery outer casing, and a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder A metal-made metal sealing pin, and a columnar portion of the metal-made metal sealing pin that protrudes from the hole of the battery exterior container through the hole of the synthetic resin cylinder and the hole of the insulating film. By caulking the other end, the insulating film, the synthetic resin cylinder, and the battery outer container are pressed and sandwiched between both ends of the metal metal sealing pin to hermetically seal the hole of the battery outer container The conventional sealing electrode terminal structure of the present invention limits the material of the electrode terminal. While being reliably insulated from the battery outer container without using a sealing structure by the fused glass, it can be sealed with excellent airtightness the hole of the battery outer case.
[0022]
In addition, a synthetic resin cylindrical body housed in a hole formed in the battery outer container, and a hole formed in both sides of the battery outer container corresponding to the hole of the battery outer container. An insulating film formed, a washer body arranged with a hole communicating with the outer surface of the one insulating film, and one end of a columnar section having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder The metal sealing pin comprising a metal sealing pin provided with a flange, passing through the hole of the synthetic resin cylinder, the hole of the insulating film, and the washer, and protruding from the hole of the battery outer casing By caulking the other end of the columnar portion, the insulating film, the synthetic resin cylinder, the washer body, and the battery outer container are pressed and sandwiched between the both ends of the metal sealing pin to open the hole of the battery outer container. By sealing hermetically, the sealed electrode terminal structure of the present invention is electrically conductive. Insulate the battery outer container reliably without using the conventional sealing structure with fused glass that limits the material of the terminal, and seal the hole of the battery outer container with excellent airtightness. Can do.
[0023]
Furthermore, a synthetic resin cylinder body accommodated in a hole formed in the battery outer container, and a hole in a portion corresponding to the hole of the battery outer container disposed on one surface of the battery outer container. A first insulating film formed by perforation, a second insulating film formed in a portion corresponding to the hole of the battery outer container and disposed on the other surface of the battery outer container, and a washer body. A laminate and a metal electrode pin having a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder, and the hole of the synthetic resin cylinder and the laminate A first insulating film and a synthetic resin cylinder are inserted between both ends of the metal electrode pin by caulking the other end of the columnar portion of the metal electrode pin that passes through the hole and protrudes from the hole of the battery outer casing. The hole of the battery outer container is hermetically sealed by pressing the body, the laminate and the battery outer container. As a result, the sealing electrode terminal structure of the present invention is reliably insulated from the battery outer casing without using the conventional sealing structure made of fused glass that limits the material of the electrode terminal, and the battery outer casing The hole of the container can be sealed with excellent airtightness.
[0024]
Therefore, in non-aqueous electrolyte batteries such as lithium batteries and lithium ion secondary batteries, when a high sealing property is required, the material of the electrode pin can be processed by using a conventional sealing structure with fused glass. In addition, there has been a problem in weldability and it has been unavoidable to use expensive titanium or special stainless steel. However, the sealed electrode terminal structure of the present invention can be made of, for example, a positive electrode terminal without using titanium or special stainless steel. For example, it is possible to use aluminum or aluminum alloy which is excellent in workability and inexpensive, and copper or the like if it is a negative electrode terminal.
[Brief description of the drawings]
FIG. 1 is an exploded view of a first embodiment of a sealed electrode terminal structure of the present invention.
FIG. 2 is a sectional view of an assembled state of the first embodiment of the sealed electrode terminal structure of the present invention.
FIG. 3 is an exploded view of a second embodiment of the sealed electrode terminal structure of the present invention.
FIG. 4 is a sectional view of an assembled state of a second embodiment of the sealed electrode terminal structure of the present invention.
FIG. 5 is an exploded view of a third embodiment of the sealed electrode terminal structure of the present invention.
FIG. 6 is a sectional view of an assembled state of a third embodiment of the sealed electrode terminal structure of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sealing electrode terminal structure 2 Electrode pin 3 Insulating film 3a Hole part 4 Synthetic resin cylinder 4a Hole part 5 Battery exterior container 6 Through-hole 7 Washer body 8 Laminated body 8a Hole part

Claims (3)

電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の両面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる絶縁フィルムと、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製封止ピンとからなり、前記合成樹脂製筒体は少なくとも前記電池外装容器に穿設された前記孔部の長さと前記両面に配設された絶縁フィルムの厚さを加えた長さ以上を有し、前記合成樹脂製筒体の孔部と絶縁フィルムの孔部を挿通し前記電池外装容器の孔部から突出する前記金属製封止ピンの柱状部の他端をかしめることにより、金属製封止ピンの両端間で絶縁フィルム、合成樹脂製筒体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことを特徴とする封止電極端子構造。A synthetic resin cylindrical body housed in a hole formed in the battery outer container and a hole formed in a portion corresponding to the hole of the battery outer container disposed on both surfaces of the battery outer container. And a metal sealing pin having a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder , and the synthetic resin cylinder is at least the battery The hole of the synthetic resin cylinder and the hole of the insulating film have a length equal to or longer than the length of the hole formed in the outer container and the thickness of the insulating film disposed on the both surfaces. By inserting the other end of the columnar portion of the metal sealing pin that protrudes from the hole of the battery outer container, an insulating film, a synthetic resin cylinder, and a battery are formed between both ends of the metal sealing pin. The outer container is pressed and clamped to hermetically seal the hole of the battery outer container. Sealing the electrode terminal structure to. 電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の両面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる絶縁フィルムと、この一方の絶縁フィルムの外面に孔部を連通して配置されたワッシャー体と、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製封止ピンとからなり、前記合成樹脂製筒体は少なくとも前記電池外装容器に穿設された前記孔部の長さと前記両面に配設された絶縁フィルムの厚さを加えた長さ以上を有し、前記合成樹脂製筒体の孔部と絶縁フィルムの孔部とワッシャー体を挿通し前記電池外装容器の孔部から突出する前記金属製封止ピンの柱状部の他端をかしめることにより、金属製封止ピンの両端間で絶縁フィルム、合成樹脂製筒体、ワッシャー体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことを特徴とする封止電極端子構造。A synthetic resin cylindrical body housed in a hole formed in the battery outer container and a hole formed in a portion corresponding to the hole of the battery outer container disposed on both surfaces of the battery outer container. An insulating film, a washer body having a hole communicating with the outer surface of the one insulating film, and a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder The synthetic resin cylinder has a length obtained by adding at least the length of the hole formed in the battery outer casing and the thickness of the insulating film provided on the both surfaces. has more than is the other end of the columnar portion of the metallic sealing pin inserted through a hole and washer of insulating film and the hole portion of the synthetic resin tubular body protruding from the hole of the battery outer container By caulking, insulating film between both ends of the metal sealing pin, synthetic Fat made cylindrical body, a sealing electrode terminal structure the washer body and the battery outer vessel was nipped characterized in that hermetically sealed hole of the battery outer case. 電池外装容器に穿設された孔部に収納されてなる合成樹脂製筒体と、前記電池外装容器の一方面に配設され前記電池外装容器の孔部に対応する部分に孔部を穿設してなる第１の絶縁フィルムと、前記電池外装容器の孔部に対応する部分に孔部を穿設し電池外装容器の他方面に配置された第２の絶縁フィルムとワッシャー体との積層体と、前記合成樹脂製筒体の内径と略同一の外径からなる柱状部の一端に鍔縁を備えた金属製電極ピンとからなり、前記合成樹脂製筒体は少なくとも前記電池外装容器に穿設された前記孔部の長さと前記両面に配設された絶縁フィルムの厚さを加えた長さ以上を有し、前記合成樹脂製筒体の孔部と積層体の孔部を挿通し前記電池外装容器の孔部から突出する前記金属製電極ピンの柱状部の他端をかしめることにより、金属製電極ピンの両端間で第１の絶縁フィルム、合成樹脂製筒体、積層体及び電池外装容器を圧接挟持して前記電池外装容器の孔部を気密封止したことを特徴とする封止電極端子構造。A synthetic resin cylindrical body housed in a hole formed in the battery outer container and a hole formed in a portion corresponding to the hole of the battery outer container disposed on one surface of the battery outer container A laminated body of a first insulating film and a second insulating film and a washer body, each of which is provided on the other surface of the battery outer container with a hole formed in a portion corresponding to the hole of the battery outer container. And a metal electrode pin having a flange at one end of a columnar portion having an outer diameter substantially the same as the inner diameter of the synthetic resin cylinder , and the synthetic resin cylinder is drilled at least in the battery outer container The battery has a length equal to or greater than the length of the hole and the thickness of the insulating film disposed on both surfaces, and is inserted through the hole of the synthetic resin cylinder and the hole of the laminate. By caulking the other end of the columnar part of the metal electrode pin protruding from the hole of the outer container. The sealing member is characterized in that the first insulating film, the synthetic resin cylinder, the laminate, and the battery outer container are press-fitted between both ends of the metal electrode pin to hermetically seal the hole of the battery outer container. Stop electrode terminal structure.
JP03790494A 1994-02-10 1994-02-10 Sealed electrode terminal structure Expired - Fee Related JP3619903B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03790494A JP3619903B2 (en) 1994-02-10 1994-02-10 Sealed electrode terminal structure

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Application Number Priority Date Filing Date Title
JP03790494A JP3619903B2 (en) 1994-02-10 1994-02-10 Sealed electrode terminal structure

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JPH07226198A JPH07226198A (en) 1995-08-22
JP3619903B2 true JP3619903B2 (en) 2005-02-16

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4904618B2 (en) * 2000-09-13 2012-03-28 株式会社Ｇｓユアサ battery
KR100751310B1 (en) 2001-09-24 2007-08-22 삼성에스디아이 주식회사 Cap assembly and retangular- type secondary battery therewith
JP4715114B2 (en) * 2004-06-17 2011-07-06 トヨタ自動車株式会社 Battery case lid packing, battery case lid manufacturing method, battery manufacturing method
CN101692501B (en) * 2005-05-17 2012-08-22 本田技研工业株式会社 Storage battery and insulating material and battery container using the same
JP5213404B2 (en) * 2007-09-28 2013-06-19 三洋電機株式会社 Sealed battery and manufacturing method thereof
JP5493265B2 (en) * 2007-12-03 2014-05-14 日産自動車株式会社 Batteries, battery packs and vehicles equipped with the same
JP2008159592A (en) * 2008-01-18 2008-07-10 Nissan Motor Co Ltd Laminated battery, battery pack module, battery pack, and vehicle equipped with the battery
DE102011089138A1 (en) * 2011-12-20 2013-06-20 Robert Bosch Gmbh Sealing device for sealing a lithium-ion battery and lithium-ion battery
JP7360861B2 (en) * 2019-09-18 2023-10-13 エナジーウィズ株式会社 battery

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