Thermal insulation material for battery pack and manufacturing method thereof

Abstract

A thermal insulation material for battery pack includes a pressure-molded body (1) of a composition having powder of a porous structure in which multiple primary particles are connected to form skeletons and which has pores between the skeletons. The porous structure is manufactured by a sol-gel reaction of a solution having two or more types of silane compounds with different numbers of siloxane bonds, and the powder of the porous structure includes particles (10) with different shapes and sizes obtained by subjecting the porous structure to a grinding process. The content of the powder of the porous structure in the composition is 65 mass % or more in a case where the solid content of the composition is 100 mass %, and the void ratio of the pressure-molded body (1) is 20% or less.

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