JP5430978B2 - 密閉電池及びその製造方法 - Google Patents
密閉電池及びその製造方法 Download PDFInfo
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- 230000005856 abnormality Effects 0.000 description 3
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
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- 229910052739 hydrogen Inorganic materials 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
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Description
開口を有する外装缶と、
前記外装缶内に収容された、正極集電板及び負極集電板をそれぞれ備える正極極板及び負極極板を有する電極体と、
前記外装缶の開口を封口している封口板と、
前記封口板に取り付けられた接続端子を有する外部端子と、
を備えた密閉電池であって、
前記接続端子と前記電極体とは電気的に接続され、
前記接続端子と前記電極体とを電気的に接続する導電経路の間に前記外装缶内部の圧力の上昇に対応して電流を遮断する電流遮断機構が設けられ、
前記接続端子は、その内部に前記電流遮断機構の電池外側に対応する側の空間に連なる貫通穴が形成され、
前記貫通穴は、前記電流遮断機構との間に密閉空間が形成されるように、弾性部材と金属板とからなる端子栓によって封止されており、前記金属板は前記接続端子に溶接されている、
ことを特徴とする。
さらに、端子栓は、弾性部材と金属板とからなるものを使用し、しかも、この金属板を接続端子にレーザ溶接等により溶接しているので、より強固に貫通穴を封止することができる。なお、この金属板のサイズは、端子栓の頭部径と同程度若しくは僅かに大径のものが好ましい。
開口を有する外装缶と、正極極板及び負極極板を有する電極体と、前記正極極板及び負極極板にそれぞれ取り付けられた正極集電板及び負極集電板と、貫通穴が形成された接続端子が設けられた外部端子と電解液注液口とを有する封口板と、を備えた密閉電池の製造方法において、
前記接続端子を前記封口板に取り付ける第1の工程と、
前記接続端子に、前記貫通穴の一方側の端部を密封するように電流遮断機構を取り付ける第2の工程と、
前記貫通穴の他方側の端部からガスを送り込んで前記接続端子と前記電流遮断機構との間の空気漏れを検査する第3の工程と、
前記電極体の正極集電体ないし負極集電体を前記電流遮断機構に固定する第4の工程と、
前記貫通穴内に弾性部材と金属板とからなる端子栓を挿入した後、前記金属板を前記接続端子に溶接固定する第5の工程と、
前記正極集電体及び負極集電体を前記電極体に溶接し、前記電極体を外装缶内に挿入し、前記封口板を前記外装缶の開口に封口する第6の工程と、
前記電解液を前記電解液注液口より注入した後、前記電解液注液口を封止する第7の工
程と、
を備えることを特徴とする。
Claims (5)
- 開口を有する外装缶と、
前記外装缶内に収容された、正極集電板及び負極集電板をそれぞれ備える正極極板及び負極極板を有する電極体と、
前記外装缶の開口を封口している封口板と、
前記封口板に取り付けられた接続端子を有する外部端子と、
を備えた密閉電池であって、
前記接続端子と前記電極体とは電気的に接続され、
前記接続端子と前記電極体とを電気的に接続する導電経路の間に前記外装缶内部の圧力の上昇に対応して電流を遮断する電流遮断機構が設けられ、
前記接続端子は、その内部に前記電流遮断機構の電池外側に対応する側の空間に連なる貫通穴が形成され、
前記貫通穴は、前記電流遮断機構との間に密閉空間が形成されるように、弾性部材と金属板とからなる端子栓によって封止されており、前記金属板は前記接続端子に溶接されている、
ことを特徴とする密閉電池。 - 前記接続端子に形成された貫通穴は、前記外装缶の外部側に大径部が、前記外装缶の内部側に小径部が形成されており、
前記端子栓は、上端部に前記貫通穴の小径部よりも大径で前記貫通穴の大径部よりも小径の頭部と、下端部に前記頭部よりも小径で前記貫通穴の小径部よりも大径の突出部及び前記突出部よりテーパー状にすぼまるように形成された係止部と、中間に前記貫通穴の小径部と略同一径で前記貫通穴の小径部の長さと実質的に同一の長さの連結部を備え、前記頭部が前記貫通穴の大径部側に位置し、前記係止部が前記貫通穴の小径部の端部より突出するように前記貫通穴に取り付けられている、
ことを特徴とする請求項1に記載の密閉電池。 - 前記電流遮断機構は、前記外装缶内部の圧力の上昇に対応して変形し、前記接続端子と前記電極体との間の電気的接続を遮断するものである、ことを特徴とする請求項1又は2
のいずれかに記載の密閉電池。 - 開口を有する外装缶と、正極極板及び負極極板を有する電極体と、前記正極極板及び負極極板にそれぞれ取り付けられた正極集電板及び負極集電板と、貫通穴が形成された接続端子が設けられた外部端子と電解液注液口とを有する封口板と、を備えた密閉電池の製造方法において、
前記接続端子を前記封口板に取り付ける第1の工程と、
前記接続端子に、前記貫通穴の一方側の端部を密封するように電流遮断機構を取り付ける第2の工程と、
前記貫通穴の他方側の端部からガスを送り込んで前記接続端子と前記電流遮断機構との間の空気漏れを検査する第3の工程と、
前記電極体の正極集電体ないし負極集電体を前記電流遮断機構に固定する第4の工程と、
前記貫通穴内に弾性部材と金属板とからなる端子栓を挿入した後、前記金属板を前記接続端子に溶接固定する第5の工程と、
前記正極集電体及び負極集電体を前記電極体に溶接し、前記電極体を外装缶内に挿入し、前記封口板を前記外装缶の開口に封口する第6の工程と、
前記電解液を前記電解液注液口より注入した後、前記電解液注液口を封止する第7の工程と、
を備えることを特徴とする、密閉電池の製造方法。 - 前記第4の工程と第5の工程との間に、再度前記貫通穴の他方側の端部からガスを送り込んで前記接続端子と前記電流遮断機構との間の空気漏れを検査する第8の工程を備えることを特徴とする請求項4に記載の密閉電池の製造方法。
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