ELECTRODE ASSEMBLY, CYLINDRICAL BATTERY, AND BATTERY PACK AND VEHICLE INCLUDING SAME

An electrode assembly according to the present invention has a configuration in which a first electrode, a second electrode, and a separator interposed therebetween are wound around a winding axis, wherein the first electrode includes an insulating layer that covers the boundary between an uncoated...

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Bibliographic Details
Main Authors LEE, Kwan-Hee, LEE, Myung-An, PARK, Jong-Sik
Format Patent
LanguageEnglish
French
Korean
Published 27.04.2023
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Summary:An electrode assembly according to the present invention has a configuration in which a first electrode, a second electrode, and a separator interposed therebetween are wound around a winding axis, wherein the first electrode includes an insulating layer that covers the boundary between an uncoated portion and a coated portion along the winding direction. The uncoated portion of the first electrode includes a plurality of segments separated from each other by cutting lines that are repeatedly formed along the winding direction. The plurality of segments are bent along the radial direction of the electrode assembly, thus forming a bent surface. The distance between a reference line and one end of the separator in the winding axis direction is at most 30% of the height of a minimum segment, where the reference line is a line passing through the lowest point in a region of the uncoated portion of the first electrode, and the minimum segment is the shortest segment among the segments forming the bent surface. Un ensemble électrode selon la présente invention présente une configuration dans laquelle une première électrode, une seconde électrode et un séparateur interposé entre celles-ci sont enroulés autour d'un axe d'enroulement, la première électrode comprenant une couche isolante qui recouvre la limite entre une partie non revêtue et une partie revêtue dans la direction d'enroulement. La partie non revêtue de la première électrode comprend une pluralité de segments séparés les uns des autres par des lignes de coupe qui sont formées de manière répétée dans la direction d'enroulement. La pluralité de segments sont pliés dans la direction radiale de l'ensemble électrode, formant ainsi une surface courbée. La distance entre une ligne de référence et une extrémité du séparateur dans la direction de l'axe d'enroulement est d'au plus 30 % de la hauteur d'un segment minimal, la ligne de référence étant une ligne passant par le point le plus bas dans une région de la partie non revêtue de la première électrode, et le segment minimal étant le segment le plus court parmi les segments formant la surface courbée. 본 발명에 따른 전극 조립체는, 제1전극 및 제2전극과 이들 사이에 개재된 분리막이 권취 축을 중심으로 권취된 전극 조립체로서, 상기 제1전극은 권취 방향을 따라 무지부 및 유지부의 경계를 커버하는 절연층을 포함한다. 상기 제1전극의 무지부는 권취 방향을 따라 반복적으로 형성된 절단 라인에 의해 서로 분리된 복수의 분절편을 포함한다. 상기 복수의 분절편은 상기 전극 조립체의 반경 방향을 따라 절곡되어 절곡면을 형성한다. 상기 제1전극의 무지부의 영역 중에서 가장 작은 높이에 대응되는 지점을 통과하는 선을 기준선이라고 하고, 상기 절곡면을 형성하는 분절편들 중에서 가장 작은 높이를 갖는 분절편을 최소 분절편이라고 할 때, 상기 분리막의 권취 축 방향 일 단부와 상기 기준선의 이격 거리는 상기 최소 분절편 높이의 30% 이하이다.
Bibliography:Application Number: WO2022KR16195