HEAT INSULATION SHEET FOR ASSEMBLED BATTERIES AND ASSEMBLED BATTERY

• Main Authors: TAKAHASHI NAOKI, ANDO HISASHI
• Format: Patent
• Language: English; Korean
• Published: 17.11.2022
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; ELECTRICITY; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

전지의 통상적 사용시의 온도에서 500℃ 이상의 고온까지 넓은 온도영역에서 뛰어난 단열성을 얻을 수 있고, 바람직하게는 단열시트에 대한 압축응력이 증가하는 경우에도 뛰어난 단열성을 유지할 수 있는 조전지용 단열시트, 및 조전지용 단열시트가 전지셀 사이에 개재된 조전지를 제공한다. 본 발명의 단열시트(10)는, 복수의 전지셀을 직렬 또는 병렬로 연결한 조전지에서 전지셀 사이에 개재되는 조전지용 단열시트로서, 실리카 나노입자로 구성된 제1 입자(21)과, 금속산화물로 구성된 제2 입자(22)를 포함하고, 제1 입자(21)의 함량은 제1 입자(21)와 제2 입자(22)의 총 중량에 대해 60 중량% 이상 95 중량% 이하이다. A heat-insulating sheet for a battery pack, ensuring that an excellent heat-insulating performance may be obtained in a wide temperature range from a temperature during normal use of a battery to a high temperature of 500°C or more and preferably, even when the compressive stress on the heat-insulating sheet for a battery pack is increased, the excellent heat-insulating performance may be maintained, and a battery pack in which the heat-insulating sheet for a battery pack is interposed between battery cells are provided. A heat-insulating sheet 10 of the present invention is a heat-insulating sheet for a battery pack, the heat-insulating sheet being interposed between battery cells of the battery pack in which the battery cells are connected in series or in parallel, in which the heat-insulating sheet for the battery pack contains a first particle 21 made from a silica nanoparticle, a second particle 22 made from a metal oxide, and an organic fiber, wherein the first particle has an average particle diameter of 1 nm or more and 100 nm or less, and in which a content of the first particle 21 is 60 mass% or more and 95 mass% or less relative to a total mass of the first particle 21 and the second particle 22.