HEAT TRANSFER SUPPRESSING SHEET AND BATTERY PACK

• Main Authors: JINBO NAOYUKI, SHIMADA SHOHEI
• Format: Patent
• Language: English; Japanese
• Published: 10.07.2023
• 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

To further improve a shape-retaining property, strength, compression characteristics and the like which are required for a heat transfer suppressing sheet, and to prevent the deterioration of the shape-retaining property, strength, compression characteristics and the like of the sheet as a whole even if a battery pack exhibits a thermal runaway.SOLUTION: A heat transfer suppressing sheet includes first inorganic fibers and second inorganic fibers 1 that have a glass transition point of 800°C or lower and have different glass transition points, respectively, and third inorganic fibers 3 that have a glass transition point of 1000°C or higher. Preferably, the heat transfer suppressing sheet further includes first inorganic particles 2 that have a glass transition point of 800°C or lower, second inorganic particles 4 that have a glass transition point of 1000°C or higher, and an organic binder 5.SELECTED DRAWING: Figure 1 【課題】熱伝達抑制シートに要求されている保形性や強度、圧縮特性などを更に向上させるとともに、電池セルが熱暴走を起こしたとしても、シート全体としての保形性や強度、圧縮特性などの低下を防ぐ。【解決手段】熱伝達抑制シートは、ガラス転移点が８００℃以下で、かつ、ガラス転移点が互いに異なる第１の無機繊維及び第２の無機繊維１と、ガラス転移点が１０００℃以上である第３の無機繊維３と、を含み、好ましくはさらに、ガラス転移点が８００℃以下である第１の無機粒子２と、ガラス転移点が１０００℃以上である第２の無機粒子４と、有機バインダ５とを含む。【選択図】図１