A heat-resistant heat insulation sheet， its manufacturing method， and an assembled battery

SUBJECT of the Invention The assembled battery which inserted a lightweight heat-resistant heat insulation sheet and this heat-resistant heat insulation sheet between cells is provided that it is excellent in heat resistance and an adiabaticity|thermal-insulation-property， and hard to burn. PROBLEM to be solved The whole thickness is 0.1-2.5 mm， The whole combustion heat is 1 MJ/m 2 or less， The ratio of content of the clay mineral which occupies for the total content of inorganic fiber and a clay mineral is equipped with the low density layer 1 below 50 mass %， and the 1st high-density layer 2 and the 2nd high-density layer 3 which were respectively provided on both surfaces of the low density layer 1， The ratio of content of the clay mineral which the 1st high-density layer 2 and the 2nd high-density layer 3 occupy for the total content of inorganic fiber and a clay mineral respectively is 50 mass % or more， The thickness of the 1st high-density layer 2 and the 2nd high-density layer 3 is the heat-resistant heat insulation sheet 10 which is below the thickness of the low density layer 1， and is 0.05 mm or more. SELECTED DRAWINGS FIG. 1 [MAT_IMAGE 000002]