JP4527191B1 - 非水系電池用電極群およびその製造方法並びに円筒形非水系二次電池およびその製造方法 - Google Patents
非水系電池用電極群およびその製造方法並びに円筒形非水系二次電池およびその製造方法 Download PDFInfo
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- JP4527191B1 JP4527191B1 JP2009259090A JP2009259090A JP4527191B1 JP 4527191 B1 JP4527191 B1 JP 4527191B1 JP 2009259090 A JP2009259090 A JP 2009259090A JP 2009259090 A JP2009259090 A JP 2009259090A JP 4527191 B1 JP4527191 B1 JP 4527191B1
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- negative electrode
- electrode plate
- active material
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- material layer
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- Inorganic Chemistry (AREA)
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Abstract
【解決手段】正極板2は、集電用芯材72の中央部に形成された芯材露出部78に正極集電リード70が接続され、負極板3は、集電用芯材12の両面に活物質層13および多孔性保護膜28が形成された両面塗工部14と、芯材露出部18と、両面塗工部14と芯材露出部18との間であって、集電用芯材12の片面にのみ活物質層13および多孔性保護膜28が形成された片面塗工部17とを有している。両面塗工部14には複数の溝部10が形成され、片面塗工部17には溝部10が形成されておらず、芯材露出部18には、負極集電リード20が接続され、芯材露出部18を巻き終端として負極板3が巻回されている。
【選択図】図2
Description
2 正極板
3 負極板
4 セパレータ
7 電池ケース
8 ガスケット
9 封口板
10 溝部
11 負極板フープ材
12 集電用芯材
13 負極活物質層
14 両面塗工部
17 片面塗工部
18 芯材露出部
19 極板構成部
20 集電リード
21 絶縁テープ
22,23 溝加工ローラ
22a,23a 溝加工用突条
24,27 ギヤ
28 多孔性保護膜
70 集電リード
71 絶縁テープ
72 集電用芯材
73 正極活物質層
74 両面塗工部
78 芯材露出部
79 極板構成部
Claims (12)
- 正極板および負極板がセパレータを介して巻回されてなる非水系電池用電極群であって、
前記正極板は、
正極の集電用芯材の両面に正極活物質層が形成された両面塗工部と、
前記正極の集電用芯材の長手方向における中央部であって、前記正極活物質層が形成されていない芯材露出部と
を有し、
前記正極板の前記芯材露出部には、正極の集電リードが接続されており、
前記負極板は、
負極の集電用芯材の両面に負極活物質層および多孔性保護膜が形成された両面塗工部と、
前記負極の集電用芯材の端部であって、前記負極活物質層および多孔性保護膜が形成されていない芯材露出部と、
前記両面塗工部と前記芯材露出部との間であって、前記負極の集電用芯材の片面にのみ前記負極活物質層および多孔性保護膜が形成された片面塗工部と
を有し、
前記負極板の前記両面塗工部の両面に複数の溝部が形成され、かつ、前記負極板の前記片面塗工部には溝部が形成されておらず、
前記溝部は、前記多孔性保護膜の表面から前記活物質層の表面に及んで該活物質層表面にも形成され、かつ、前記多孔性保護膜の膜厚は、前記溝部の深さよりも小さく、
前記負極板の前記芯材露出部には、負極の集電リードが接続されており、
前記負極板の前記芯材露出部を巻き終端として前記負極板が巻回されていることを特徴とする非水系電池用電極群。 - 前記多孔性保護膜は、無機酸化物を主成分とする材料からなることを特徴とする請求項1に記載の非水系電池用電極群。
- 前記多孔性保護膜の主成分である無機酸化物は、アルミナおよび/またはシリカを主成分とすることを特徴とする請求項2に記載の非水系電池用電極群。
- 前記両面塗工部の両面に形成された溝部は、位相が対称になっていることを特徴とする請求項1に記載の非水系電池用電極群。
- 前記負極板の両面塗工部の両面に形成された溝部の深さは、4μm〜20μmの範囲にあることを特徴とする請求項1に記載の非水系電池用電極群。
- 前記負極板の両面塗工部の両面に形成された溝部は、前記負極板の長手方向に沿って、100μm〜200μmのピッチで形成したことを特徴とする請求項1に記載の非水系電池用電極群。
- 前記負極板の両面塗工部の両面に形成された溝部は、前記負極板の幅方向に対して、一端面から他端面に貫通して形成されていることを特徴とする請求項1に記載の非水系電池用電極群。
- 前記負極板の両面塗工部の両面に形成された溝部は、前記負極板の長手方向に対して、互いに異なる方向に45°の角度に傾斜して形成され、且つ、互いに直角に立体交差していることを特徴とする請求項1に記載の非水系電池用電極群。
- 前記負極の集電リードと前記負極板の片面塗工部における前記活物質層および多孔性保護膜とは、前記集電用芯材に対して互いに反対側に位置していることを特徴とする請求項1に記載の非水系電池用電極群。
- 請求項1に記載の非水系電池用電極群を製造する方法であって、
前記セパレータを介して前記正極板および前記負極板を捲回する工程を備え、
前記正極板と前記負極板とを捲回する工程では、前記負極板の前記芯材露出部を巻き終端として前記負極板を捲回することを特徴とする非水系電池用電極群の製造方法。 - 電池ケース内に、請求項1に記載の前記電極群が収容されるとともに、所定量の非水電解液が注液され、かつ、前記電池ケースの開口部が密閉状態に封口されていることを特徴とする円筒形非水系二次電池。
- 請求項11に記載の円筒形非水系二次電池の製造方法であって、
請求項9に記載の方法に従って前記電極群を作製する工程と、
前記電池ケース内に前記電極群および前記非水電解液を収容して、前記電池ケースを封口する工程とを備えていることを特徴とする円筒形非水系二次電池の製造方法。
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CN2009801153482A CN102017272A (zh) | 2009-01-16 | 2009-11-16 | 非水系电池用电极组及其制造方法、以及圆筒形非水系二次电池及其制造方法 |
US12/933,071 US7951487B2 (en) | 2009-01-16 | 2009-11-16 | Electrode group for nonaqueous battery and method for producing the same, and cylindrical nonaqueous secondary battery and method for producing the same |
KR1020107019949A KR20100112644A (ko) | 2009-01-16 | 2009-11-16 | 비수성 전지용 전극군 및 그 제조 방법, 그리고 원통형 비수성 이차전지 및 그 제조 방법 |
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