ELECTRODE ASSEMBLY AND ELECTROCHEMICAL ELEMENT COMPRISING SAME

• Main Authors: LEE, Junghoon, LEE, Hyunsoo, KWON, Soon Kwan, LEE, Jong Yoon, LEE, Changhoon
• Format: Patent
• Language: English; French; Korean
• Published: 25.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided is an electrode assembly comprising a negative electrode structure and multiple positive electrodes. The negative electrode structure comprises first and second separators, and a lithium metal layer interposed between the first and second separators. The negative electrode structure comprises multiple stack portions and multiple folding portions. The electrode assembly has a structure in which the stack portions of the negative electrode structure and the positive electrodes are stacked alternately and successively. The negative electrode includes multiple negative electrode tabs protruding in the transverse direction compared with the first and second separators in the negative electrode structure. The number of negative electrode tabs is smaller than the number of stack portions of the the negative electrode structure by at least one. An electrode assembly according to a specific embodiment of the present invention has a reduced number of negative electrode tabs, thereby improving the productivity in following processes such as a negative electrode tab welding process. L'invention concerne un ensemble électrode comprenant une structure d'électrode négative et de multiples électrodes positives. La structure d'électrode négative comprend des premier et second séparateurs, et une couche métallique de lithium interposée entre les premier et second séparateurs. La structure d'électrode négative comprend de multiples parties d'empilement et de multiples parties de pliage. L'ensemble électrode a une structure dans laquelle les parties d'empilement de la structure d'électrode négative et des électrodes positives sont empilées en alternance et successivement. L'électrode négative comprend de multiples languettes d'électrode négative faisant saillie dans la direction transversale par rapport aux premier et second séparateurs dans la structure d'électrode négative. Le nombre de languettes d'électrode négative est inférieur au nombre de parties d'empilement de la structure d'électrode négative d'au moins une unité. Un ensemble électrode selon un mode de réalisation spécifique de la présente invention a un nombre réduit de languettes d'électrode négative, ce qui permet d'améliorer la productivité dans les processus suivants tels qu'un processus de soudage de languette d'électrode négative. 음극 구조체 및 복수의 양극을 포함하는 전극 조립체가 제공된다. 상기 음극 구조체는 제1 및 제2 분리막, 및 상기 제1 및 제2 분리막 사이에 개재된 리튬 금속층을 포함한다. 상기 음극 구조체는 복수의 스택부 및 복수의 폴딩부를 포함한다. 상기 전극 조립체는 음극 구조체의 스택부와 양극이 교호로 순차적으로 적층된 구조를 가진다. 상기 음극은 음극 구조체에서 제1 및 제2 분리막보다 폭 방향으로 돌출된 복수의 음극 탭을 포함한다. 상기 음극 탭의 수는 음극 구조체의 스택부의 수보다 적어도 하나 이상 적다. 본 발명의 일 구체예에 따른 전극 조립체는 음극 탭의 개수를 줄여 음극 탭의 용접 공정 등 이후 공정에서 생산성을 향상시킬 수 있다.