JP5163026B2 - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
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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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Description
本発明の非水電解質二次電池の第一の実施の形態として説明した図1、および第二の実施の形態として説明した図2を参照して説明する。なお図2において第二の実施の形態では正極として説明したが、実施例1では負極として置き換えて説明する。実施例1の正極は、図1に示すように帯状の正極集電体1上に正極活物質層5が形成され、正極活物質層の非形成部6に正極タブ3が接合され、接合部を導電シート2で被覆した構造となっている。実施例1の負極は図2に示すように、帯状の負極集電体1上に負極活物質層5が形成され、負極活物質層の非形成部6に負極タブ3が接合され、接合部を導電シート2で被覆した構造となっている。負極タブには、集電体から突出しているところで、保護テープ4が負極タブの周りに巻かれている。この正極と負極とを、セパレータを介して巻回した電極巻回体が外装体に収納されて非水電解質二次電池を製造した。
実施例2は正極タブの接合部に導電シートを使用せず、負極タブの接合部のみに導電シートを使用した。それ以外は、実施例1と同様に非水電解質二次電池を製造した。
実施例3は実施例2の負極に使用した導電シートすなわち導電性樹脂を塗布した部分に代わりにポリプレピレン樹脂を基材とし炭素粉末を充填させたアクリル系導電樹脂を粘着剤とする導電シートを貼り付けた。導電シートの貼り付け寸法は、実施例1と同様に16mm×7mmとした。実施例2と同様に正極の正極タブの正極集電体の接合部には、導電シートを使用しない。それ以外は、実施例1と同様に非水電解質二次電池を製造した。
実施例4は実施例2の負極に使用した導電シートすなわち導電樹脂を塗布した部分に代わりに粘着剤のない厚さ30μmの銅箔シートを配置し、銅箔シートとNiタブ、集電体とを超音波溶接し銅箔シートからなる導電シートで負極タブと負極集電体の接合部を被覆した。実施例2と同様に正極の正極タブの正極集電体の接合部には、導電シートを使用しない。それ以外は、実施例1と同様に非水電解質二次電池を製造した。
実施例5は実施例4の銅箔シートのNiタブとの対向部分を除く、集電体との対向部分のみ超音波溶接し銅箔シートからなる導電シートで負極タブと負極集電体の接合部を被覆した。実施例2と同様に正極の正極タブの正極集電体の接合部には、導電シートを使用しない。それ以外は、実施例1と同様に非水電解質二次電池を製造した。
比較例1は、正極、負極ともに導電シートを使用していないもので、それ以外は、実施例1と同様に非水電解質二次電池を製造した。
比較例2は、実施例2の負極に使用した導電性樹脂を塗布した部分に基材をポリプレピレン樹脂とし粘着剤に導電性のないアクリル系樹脂を用いた絶縁性テープを貼り付けた。また、正極タブには、実施例2同様に導電シートを使用しない。それ以外は、実施例1と同様に非水電解質二次電池を製造した。
2 導電シート
3 正(負)極タブ
4 保護テープ
5 正(負)極活物質層
6 (正極活物質層の)非形成部
Claims (3)
- 正極集電体上の一部に正極活物質層が形成され、前記正極集電体の、該正極活物質層が形成されていない活物質層非成形部に正極タブが接合された正極と、負極集電体上の一部に負極活物質層が形成され、前記負極集電体の、該負極活物質層が形成されていない活物質層非成形部に負極タブが接合された負極とが、セパレータを介して積層または扁平状に巻回された電極体が外装体に収納されてなる非水電解質二次電池であって、
前記正極タブと前記正極集電体の活物質層非成形部との接合部、および前記負極タブと前記負極集電体の活物質層非成形部との接合部の少なくとも一方が導電性の粘着剤を有する導電シートで被覆されており、
前記導電シートが前記導電性の粘着剤を用いて該少なくとも一方の接合部に貼り付けられていることを特徴とする非水電解質二次電池。 - 前記導電シートは、前記正極集電体の活物質層非成形部の、前記正極タブが接合された側の面全体、および前記負極集電体の活物質層非成形部の、前記負極タブが接合された側の面全体の少なくとも一方を覆っていることを特徴とする、請求項1に記載の非水電解質二次電池。
- 前記導電シートは、前記正極集電体の活物質層非成形部の、前記正極タブが接合された側の面とは反対側の面全体、および前記負極集電体の活物質層非成形部の、前記負極タブが接合された側の面とは反対側の面全体の少なくとも一方をさらに覆っていることを特徴とする、請求項2に記載の非水電解質二次電池。
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JP5288452B2 (ja) * | 2008-05-21 | 2013-09-11 | Necエナジーデバイス株式会社 | 非水電解液二次電池 |
JP2014013647A (ja) * | 2010-10-20 | 2014-01-23 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
JP5468714B1 (ja) * | 2012-08-29 | 2014-04-09 | 昭和電工株式会社 | 蓄電デバイスおよびその製造方法 |
JP6070067B2 (ja) * | 2012-10-30 | 2017-02-01 | ソニー株式会社 | 電池、電極、電池パック、電子機器、電動車両、蓄電装置および電力システム |
JP2014207069A (ja) * | 2013-04-11 | 2014-10-30 | 株式会社Shカッパープロダクツ | 樹脂付きタブリード及びその連続体、並びにそれらの製造方法 |
KR102459970B1 (ko) * | 2018-11-27 | 2022-10-26 | 주식회사 엘지에너지솔루션 | 원통형 이차 전지 |
KR102549437B1 (ko) * | 2018-11-30 | 2023-06-28 | 주식회사 엘지에너지솔루션 | 전극 조립체 및 이를 포함하는 이차 전지 |
CN114039080B (zh) * | 2021-11-05 | 2022-07-19 | 宁德新能源科技有限公司 | 一种电芯、电池及用电装置 |
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JPS61218058A (ja) * | 1985-03-25 | 1986-09-27 | Fuji Elelctrochem Co Ltd | 電池 |
JPH05251073A (ja) * | 1991-04-30 | 1993-09-28 | Nippon Telegr & Teleph Corp <Ntt> | 円筒型非水電解液二次電池 |
US5705297A (en) * | 1996-03-04 | 1998-01-06 | Bell Communications Research, Inc. | Electrical connection for a polymeric laminate battery structure |
JP2000164196A (ja) * | 1998-11-25 | 2000-06-16 | Japan Storage Battery Co Ltd | 電池用極板の集電体とリードとの接合構造 |
JP2000277159A (ja) * | 1999-03-29 | 2000-10-06 | Japan Storage Battery Co Ltd | 非水電解質二次電池 |
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