Battery potting premixed polyether polyol as well as preparation method and application thereof

The invention relates to battery potting premixed polyether polyol as well as a preparation method and application thereof, and the battery potting premixed polyether polyol is prepared from the following raw materials in parts by weight: 10 to 20 parts of polyether polyol I, 38 to 50 parts of polyether polyol II, 10 to 15 parts of chain extender, 0.1 to 0.5 part of catalyst, 1.0 to 3.0 parts of silicon surfactant DS2125, 0.1 to 0.8 part of water and 25 to 40 parts of flame retardant. The flame retardant is prepared from TCPP, TEP and beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) isooctyl propionate according to the mass ratio of 20 to 10 to (1 to 3); the sum of the parts of the polyether polyol I, the polyether polyol II, the chain extender, the catalyst, the silicon surfactant, the water and the flame retardant is 100; the polyurethane pouring sealant prepared from the premixed polyether polyol is simple in construction process and has excellent flame retardant property, and the flame retardant grade is UL94 V0