JP7484071B2 - 電極の積層特性を改善した負極シート及び負極を含む電極組立体及びその製造方法 - Google Patents
電極の積層特性を改善した負極シート及び負極を含む電極組立体及びその製造方法 Download PDFInfo
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Description
10 正極
11 正極合剤層
111 正極平坦部
112 正極傾斜部
113 正極無地部
114 正極タブネック
2 負極板
20 負極
21 負極合剤層
211 負極平坦部
212 負極傾斜部
213 負極無地部
214 負極タブネック
3 正極タブ
31 正極タブ下部
4 負極タブ
41 負極タブ下部
5 分離膜
6 ショルダー部
100 プレス
110 下部プレス
200 負極シート
210 金型
220 負極タブ金型部
230 ショルダー部金型部
300 シートフィーダー
400 正極シート
500 負極対正極容量逆転部
Claims (18)
- ACOH(Anode Cathode Overhang)ギャップを確保するための負極の製造方法であって、
全長方向(Y軸方向)に活物質塗布部及び無地部が形成された陰極ロールを製造する第1段階と、
前記陰極ロールの全幅方向(X軸方向)に所定の間隔Aで前記活物質塗布部及び無地部を含む負極タブ及び前記活物質塗布部を含むショルダー部を形成するためのノッチングを遂行する第2段階と、
前記ショルダー部を基準に全幅方向(X軸方向)に所定の間隔Bでカッティングする第3段階と、を含み、
前記ショルダー部の全長方向中心線は正極の正極タブの中心線と一致するレベルで形成され、
前記負極に含まれる負極板は前記正極に含まれる正極板より相対的に大きな面積を有する、負極の製造方法。 - 負極の外周端部を基準に前記ショルダー部の全長方向の高さは前記負極タブの前記活物質塗布部の高さと一致するかそれより低い、請求項1に記載の負極の製造方法。
- 前記ショルダー部の全幅W6は、前記正極タブの全幅及び前記正極タブの両側のACOHギャップを含む、請求項1に記載の負極の製造方法。
- 前記ショルダー部の全長L6は前記負極の一側外部端部から0.1~3mmである、請求項1に記載の負極の製造方法。
- 所定の間隔Aで活物質塗布部及び無地部を含む負極タブ及び前記活物質塗布部を含むショルダー部が形成される負極であって、
前記ショルダー部は、正極と積層されるとき、正極タブと対面する位置に形成され、
前記負極に含まれる負極板は前記正極に含まれる正極板より相対的に大きな面積を有し、
前記ショルダー部の突出長L6は正極合剤層が塗布されている前記正極タブの下部より大きい長さを有する、負極。 - 前記ショルダー部の活物質塗布部のうちの負極傾斜部の断面容量は正極タブの活物質塗布部のうちの正極傾斜部の断面容量より高い負極対正極容量逆転部がない、請求項5に記載の負極。
- 負極端から負極タブネックまでの高さHNTN2と前記負極端において前記ショルダー部が形成される開始点から前記活物質塗布部までの高さHNSの負極高比HNTN2/HNSは5.0~1である、請求項5に記載の負極。
- 正極タブが一側外部端部から突出しており、正極活物質を含む正極合剤層が前記正極タブの下部及び集電体上に塗布されている正極と、
負極タブが一側外部端部から突出しており、陰極活物質を含む負極合剤層が前記負極タブの下部及び集電体上に塗布されている負極と、
前記正極及び負極の間に位置する分離膜と、を含み、
前記負極は、請求項5から7のいずれか一項に記載の負極である、電極組立体。 - 前記負極の前記負極タブ及び前記ショルダー部は前記負極の全長方向(Y軸方向)の一側端部に一緒に形成されるか両側端部に形成される、請求項8に記載の電極組立体。
- 請求項8または9に記載の電極組立体を製造する電極組立体製造方法であって、
負極のショルダー部をビジョンセンシングする段階と、
前記ショルダー部の全幅または全長を基準に正極の正極タブが位置するように積層する段階と、
前記積層された正極タブ及び前記ショルダー部のACOHギャップを測定して電極組立体の積層ずれを防止する段階とを含み、
前記負極は、全幅方向(X軸方向)に所定の間隔Aで活物質塗布部及び無地部を含む負極タブ及び前記活物質塗布部のみを含む前記ショルダー部が形成され、
前記ショルダー部の全幅は前記正極タブの全幅及び前記正極タブの両側のACOHギャップを含む、電極組立体製造方法。 - 前記ショルダー部の全幅または全長を基準に前記正極の前記正極タブが位置するように積層する段階と、
前記正極の前記正極タブの下に積層された前記負極の前記ショルダー部をビジョンセンシングする段階と、
積層された全長方向(Y軸方向)の前記正極の一端部と前記負極の一端部との間の間隔及び前記積層された正極タブ及び前記ショルダー部のACOHギャップを測定して前記正極及び前記負極のギャップを把握する段階とを含む、請求項10に記載の電極組立体製造方法。 - 前記電極組立体は、スタック型、ジグザグ型、ゼリーロール型またはスタック/フォルディング型の構造を有する、請求項10または11に記載の電極組立体製造方法。
- 前記電極組立体は、単一極板、両側外面の極板の極性が同一であるバイセル、または両側外面の極板の極性が互いに異なるフルセルからなる単位セルから構成される、請求項10または11に記載の電極組立体製造方法。
- 前記正極タブ及び前記負極タブは、全長方向(Y軸方向)を基準に同一方向または反対方向に形成される、請求項10から13のいずれか一項に記載の電極組立体製造方法。
- 請求項8または9に記載の電極組立体と、前記電極組立体と電解液を内蔵する電池ケースと、を有する、電池セル。
- 請求項15に記載の電池セルを一つ以上含んでいる、電池パック。
- 請求項16に記載の電池パックを含む、デバイス。
- 電極合剤層を含む電極シートを準備する第1段階と、
前記電極シートを一対以上の電極挿入ローラーに挿入する第2段階と、
挿入された前記電極シートを前記一対以上の電極挿入ローラーが回転しながら一方向に移動させる第3段階と、
前記電極シートが移動するうちに電極シートに形成された電極合剤層の厚さの測定によって、負極の厚さ比、正極の厚さ比、及び負極対正極容量比を含む測定値を得る第4段階と、を含み、
前記電極シートのうちの負極シートは、所定の間隔Aで活物質塗布部及び無地部を含む負極タブ及び前記活物質塗布部を含むショルダー部が形成され、
前記ショルダー部の全長方向中心線は正極の正極タブの中心線と一致するレベルで形成される、電極合剤層厚さ測定方法。
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JP2019050095A (ja) | 2017-09-08 | 2019-03-28 | 株式会社豊田自動織機 | 蓄電装置及び蓄電装置の製造方法 |
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JP2009123752A (ja) | 2007-11-12 | 2009-06-04 | Mitsubishi Electric Corp | 電力貯蔵デバイスおよびその製造方法 |
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JP2015536034A (ja) | 2013-09-25 | 2015-12-17 | エルジー・ケム・リミテッド | 電極組立体及びこれを含む二次電池 |
JP2019050095A (ja) | 2017-09-08 | 2019-03-28 | 株式会社豊田自動織機 | 蓄電装置及び蓄電装置の製造方法 |
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WO2022034995A1 (ko) | 2022-02-17 |
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CN216054795U (zh) | 2022-03-15 |
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