Abstract: The disclosure relates to a sandwich composite board and a preparation method thereof. The sandwich composite board includes, from top to bottom, an upper panel layer, a core material layer, and a lower panel layer, wherein the upper panel layer and the lower panel layer are glass or fiber reinforced resin-based composite sheets; and the core material layer is composed of an aerogel, a resin, and an expandable microsphere foaming agent. Method (1) includes: heating and melting the resin to obtain slurry A, cooling the same, adding the aerogel and the expandable microsphere foaming agent thereto, and uniformly mixing the same to obtain slurry B, then flat-laying the lower panel layer, coating or printing with the slurry B, then laying the upper panel layer and hot press molding the same.

Abstract: This application discloses a heat-resistant protective member and a battery. The heat-resistant protective member includes a reinforcing layer, a functional layer, and a strengthening layer that are sequentially arranged; the functional layer includes a first resin and a filler dispersed in the first resin; and the reinforcing layer and the strengthening layer each include a fiber matrix. In the foregoing manner, thermal impact of a single battery during ignition and detonation can be resisted, and structural integrity under the thermal impact can still be prevented from being broken through, so as to provide effective heat insulation and protection for a battery pack.

Abstract: A heat-resistant protective member and a battery are disclosed. The heat-resistant protective member includes a compound layer, and the compound layer includes a fiber matrix and a resin. The resin is dispersed in pores of the fiber matrix and/or a surface of the fiber matrix, and a volume proportion of the fiber matrix in the compound layer is 50% to 75%. In this way, the thermal shock when a battery cell is ignited and exploded can be resisted, and the structural integrity can still be maintained without being broken through under the thermal shock, thereby providing effective heat insulation and protection for a battery pack.

Abstract: The present disclosure provides a preparation method of an aluminum silicate fiber-reinforced aerogel felt, including the following steps: mixing orthosilicate, ethanol, and water evenly, adding an NH4F solution and ammonia water successively, and stirring evenly to obtain a silica sol; winding an aluminum silicate fiber felt into a roll and mounting on a rotatable central shaft of a impregnation reaction kettle; where a plurality of injection holes are equidistantly provided on a surface of the reaction kettle; the central shaft of the reaction kettle drives the aluminum silicate fiber felt to rotate and slowly inject the silica sol into the surface of the fiber felt through the injection holes to conduct the impregnation; allowing the fiber felt-gel composite to stand to conduct aging; placing the aged fiber felt-gel composite in absolute ethanol to conduct solvent replacement to remove moisture; and drying to obtain the aluminum silicate fiber-reinforced aerogel felt.

Abstract: A heat insulation and preservation composite board includes a first panel layer and a heat insulation and preservation layer. The heat insulation and preservation layer and the first panel layer are integrally formed. The first panel layer is a fiber-reinforced resin-based composite sheet, a metal plate, a cement plate, a calcium silicate plate, or a gypsum plate. The heat insulation and preservation layer is a fiber-reinforced aerogel felt. A preparation method of the heat insulation and preservation composite board includes: (1) laying the fiber-reinforced aerogel felt flat; (2) laying the first panel layer flat on the upper surface of the fiber-reinforced aerogel felt; (3) performing a hot-press molding process to obtain the heat insulation and preservation composite board.

Abstract: The disclosure relates to a sandwich composite board and a preparation method thereof. The sandwich composite board includes, from top to bottom, an upper panel layer, a core material layer, and a lower panel layer, wherein the upper panel layer and the lower panel layer are glass or fiber reinforced resin-based composite sheets; and the core material layer is composed of an aerogel, a resin, and an expandable microsphere foaming agent. Method (1) includes: heating and melting the resin to obtain slurry A, cooling the same, adding the aerogel and the expandable microsphere foaming agent thereto, and uniformly mixing the same to obtain slurry B, then flat-laying the lower panel layer, coating or printing with the slurry B, then laying the upper panel layer and hot press molding the same.

Abstract: The present disclosure provides a preparation method of an aluminum silicate fiber-reinforced aerogel felt, including the following steps: mixing orthosilicate, ethanol, and water evenly, adding an NH4F solution and ammonia water successively, and stirring evenly to obtain a silica sol; winding an aluminum silicate fiber felt into a roll and mounting on a rotatable central shaft of a impregnation reaction kettle; where a plurality of injection holes are equidistantly provided on a surface of the reaction kettle; the central shaft of the reaction kettle drives the aluminum silicate fiber felt to rotate and slowly inject the silica sol into the surface of the fiber felt through the injection holes to conduct the impregnation; allowing the fiber felt-gel composite to stand to conduct aging; placing the aged fiber felt-gel composite in absolute ethanol to conduct solvent replacement to remove moisture; and drying to obtain the aluminum silicate fiber-reinforced aerogel felt.