Flame-retardant sheet, manufacturing method of the same, and assembled battery

Abstract

To provide a flame-retardant sheet which is formed by combining a heat insulation sheet with an elastic material, and can prevent deterioration of heat insulation quality and falling of powder of a material from the heat insulation sheet, secure sufficient strength of an elastic material, and maintain an effect for easing stress on a member disposed adjacent to the flame-retardant sheet.SOLUTION: A flame-retardant sheet 1 includes: a heat insulation sheet 50 having a pair of major surfaces 51 which are orthogonal to a thickness direction, and end surfaces 53 each connecting the pair of major surfaces 51; and an elastic material 60 covering the major surfaces 51 and the end surfaces 53 of the heat insulation sheet 50. The elastic material 60 has: a major surface side elastic material 61 covering the major surfaces 51 of the heat insulation sheet 50; and end surface side elastic materials 63 each covering the end surface 53 of the heat insulation sheet 50. The major surface side elastic material 61 does not enter the inside of the heat insulation sheet 50 from the major surface 51 side of the heat insulation sheet 50.SELECTED DRAWING: Figure 1B

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