Battery Pack Comprising Top Frame with Bent Blocking Part

• Main Authors: KIM SOO YOUL, PARK JUN KYU, SEONG JUN YEOB
• Format: Patent
• Language: English; Korean
• Published: 03.06.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ELECTRICITY; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The present invention relates to a battery pack including a top frame having a bent blocking part formed thereon. According to the present invention, the battery pack comprises: a battery cell stack in which a plurality of battery cells are stacked; a main frame formed of a bottom surface and two side walls to cover the lower surface and both sides of the battery cell stack; a top frame disposed on the upper surface of the battery cell stack; and an end frame disposed to face an electrode lead of the battery cell stack, wherein a bent part bent toward the battery cell stack is formed on the outer periphery of the top frame. Accordingly, the present invention provides a battery pack preventing a laser beam according to laser welding from being transmitted into the battery pack during a battery pack manufacturing process and having increased energy density while reducing the weight compared to the same volume of the battery pack. 본 발명은 복수의 전지셀들이 적층되어 있는 전지셀 적층체, 상기 전지셀 적층체의 하면과 양쪽 측면을 감싸도록 바닥면과 2개의 측벽으로 구성되는 메인 프레임, 상기 전지셀 적층체의 상면 상에 위치하는 탑 프레임, 및 상기 전지셀 적층체의 전극리드와 대향하도록 배치되는 엔드 프레임을 포함하고, 상기 탑 프레임의 외주변부에는 전지셀 적층체 방향으로 구부러진 절곡부를 포함하는 전지팩에 대한 것으로서, 전지팩 제조 과정에서 레이저 용접에 따른 레이저 빔이 전지팩 내부로 투과되는 것을 방지하고, 전지팩의 동일 부피 대비 무게를 줄이고 에너지밀도는 향상된 전지팩을 제공할 수 있다.