JP5281836B2 - 電極組立体及びこれを用いた二次電池 - Google Patents
電極組立体及びこれを用いた二次電池 Download PDFInfo
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- 239000006183 anode active material Substances 0.000 claims description 85
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- 238000004804 winding Methods 0.000 claims description 30
- 239000006256 anode slurry Substances 0.000 claims description 14
- 239000006257 cathode slurry Substances 0.000 claims description 14
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
20 陽極板
21 陽極集電体
22 陽極活物質層
23 陽極集電体露出領域(陽極無地部)
24 陽極タブ
25、35 保護部材
26、26’、36 絶縁部材
26a、26a’ 接着層
26b、26b’ 絶縁フィルム
30 陰極板
31 陰極集電体
32 陰極活物質層
33 陰極集電体露出領域(陰極無地部)
34 陰極タブ
40、125、225 セパレータ
100、200 二次電池
110、210 外装材
121、123、221、223 電極タブ
122、124、222、224 電極板
130 キャップ組立体
131 キャッププレート
131a 端子通孔
131b 電解液注入口
131c 電解液注入口栓
132 電極端子
133 ガスケット
134 絶縁プレート
135 ターミナルプレート
136 絶縁ケース
136a 電解液注入通孔
136b 引出し溝(引出しグルーブ)
136c 引出し孔(引出しホール)
210a 熱融着層
210b 金属層
210c 絶縁膜
211 上部外装材
211a 上部シーリング部
212 下部外装材
212a 下部シーリング部
226、227 タブテープ
A、B 不均一領域
C 均一領域
Claims (15)
- 陽極集電体と、前記陽極集電体上に形成された陽極活物質層と、前記陽極集電体上に設けられた陽極集電体露出領域とを備えた陽極板と、
陰極集電体と、前記陰極集電体上に形成された陰極活物質層と、前記陰極集電体上に設けられた陰極集電体露出領域とを備えた陰極板と、
前記陽極板と前記陰極板との間に介在されるセパレータとを含み、
前記陽極活物質層または/および前記陰極活物質層の電極組立体の巻き取り方向の両端のうちの少なくともいずれかの端部に隣接して、前記陽極集電体露出領域または前記陰極集電体露出領域の少なくとも一面に配設される絶縁部材を備え、
前記陽極活物質層及び前記陰極活物質層は、陽極用スラリーまたは陰極用スラリーが均一に塗布された均一領域及び、前記陽極用スラリーまたは前記陰極用スラリーが均一に塗布されない不均一領域を有し、
前記絶縁部材は、接着層と前記接着層の一面に付着される絶縁フィルムからなり、
前記接着層は、前記陽極活物質層または前記陰極活物質層の前記電極組立体の巻き取り方向の両端部の前記不均一領域に隣接して位置し、かつ、前記陽極活物質層または前記陰極活物質層と接触しないように設けられ、
前記絶縁フィルムは、前記不均一領域を覆うことを特徴とする電極組立体。 - 前記接着層は、前記陽極活物質層または前記陰極活物質層の前記電極組立体の巻き取り方向の両端部の各端部から、3.5mm以内の間隔で離隔されて設けられることを特徴とする、請求項1に記載の電極組立体。
- 前記絶縁部材の前記接着層と前記絶縁フィルムとを合わせた厚さは、前記陽極活物質層または前記陰極活物質層の前記均一領域の厚さと同一であることを特徴とする、請求項1に記載の電極組立体。
- 前記不均一領域は、前記陽極用スラリーまたは前記陰極用スラリーを塗布する際の、塗布開始領域及び塗布終了領域であることを特徴とする、請求項1に記載の電極組立体。
- 前記塗布開始領域は前記均一領域の厚さよりも厚く形成され、前記塗布終了領域は前記均一領域の厚さよりも薄く形成されることを特徴とする、請求項4に記載の電極組立体。
- 前記塗布開始領域に隣接して形成された前記絶縁部材の前記接着層と前記絶縁フィルムとを合わせた厚さは、前記塗布開始領域の厚さと同一であることを特徴とする、請求項4に記載の電極組立体。
- 外装材と;
前記外装材に収容され、
陽極集電体と、前記陽極集電体上に形成された陽極活物質層と、前記陽極集電体上に設けられた陽極集電体露出領域と、を備えた陽極板と、
陰極集電体と、前記陰極集電体上に形成された陰極活物質層と、前記陰極集電体上に設けられた陰極集電体露出領域と、を備えた陰極板と、
前記陽極板と前記陰極板との間に介在されるセパレータと、
を含む電極組立体と;
を含み、
前記電極組立体は、前記陽極活物質層または/および前記陰極活物質層の前記電極組立体の巻き取り方向の両端のうちの少なくともいずれかの端部に隣接して、前記陽極集電体露出領域または前記陰極集電体露出領域の少なくとも一面に配設される絶縁部材を備え、
前記陽極活物質層及び前記陰極活物質層は、陽極用スラリーまたは陰極用スラリーが均一に塗布された均一領域及び、前記陽極用スラリーまたは前記陰極用スラリーが均一に塗布されない不均一領域を有し、
前記絶縁部材は、接着層と前記接着層の一面に付着される絶縁フィルムからなり、
前記接着層は、前記陽極活物質層または前記陰極活物質層の前記電極組立体の巻き取り方向の両端部の前記不均一領域に隣接して位置し、かつ、前記陽極活物質層または前記陰極活物質層と接触しないように設けられ、
前記絶縁フィルムは、前記不均一領域を覆うことを特徴とする二次電池。 - 前記外装材の形状は、円筒型、角柱型または、角に丸みを有する柱型のうちのいずれかの形状に形成されることを特徴とする、請求項7に記載の二次電池。
- 前記外装材は、一方の端部に開口部が形成され、前記開口部にキャップ組立体が装着されることを特徴とする、請求項8に記載の二次電池。
- 前記外装材は、パウチ型であることを特徴とする、請求項7に記載の二次電池。
- 前記接着層は、前記陽極活物質層または前記陰極活物質層の前記電極組立体の巻き取り方向の端部から、3.5mm以内の間隔で離隔されて設けられることを特徴とする、請求項7に記載の二次電池。
- 前記絶縁部材の前記接着層と前記絶縁フィルムとを合わせた厚さは、前記陽極活物質層または前記陰極活物質層の前記均一領域の厚さと同一であることを特徴とする、請求項7に記載の二次電池。
- 前記不均一領域は、前記陽極用スラリーまたは前記陰極用スラリーを塗布する際の、塗布開始領域及び塗布終了領域であることを特徴とする、請求項7に記載の二次電池。
- 前記塗布開始領域は前記均一領域の厚さよりも厚く形成され、前記塗布終了領域は前記均一領域の厚さよりも薄く形成されることを特徴とする、請求項13に記載の二次電池。
- 前記塗布開始領域に隣接して形成された前記絶縁部材の前記接着層と前記絶縁フィルムとを合わせた厚さは、前記塗布開始領域の厚さと同一であることを特徴とする、請求項13に記載の二次電池。
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