the insulation holder comprises a main body plate, a first wall plate, and a second wall plate, wherein;

the main body plate has a first surface and a second surface, the second surface faces an electrode assembly of the energy-storage apparatus, and the first wall plate and the second wall plate are provided on the first surface and opposite to each other in a length direction of the main body plate;

the first wall plate extends away from the main body plate in a thickness direction of the main body plate, the second wall plate extends away from the main body plate in the thickness direction of the main body plate, the main body plate, the first wall plate, and the second wall plate jointly define a receiving space, the receiving space is used for receiving the explosion-proof-valve holder, and the main body plate, the first wall plate, and the second wall plate are all spaced apart from the explosion-proof-valve holder to form a first airflow channel;

the first wall plate and the second wall plate are both spaced apart from the explosion-proof-valve holder by a spacing distance S1 ranging from 0.95 mm to 2.65 mm in the length direction of the main body plate;

the insulation holder comprises a first holder and a second holder, wherein the first holder and the second holder are in mirror symmetry, the first holder is spaced apart from the second holder to form a second airflow channel, and the first holder is spaced apart from the second holder by a spacing distance S3 ranging from 1.6 mm to 5.25 mm; and

the main body plate defines a vent hole, wherein an inner wall of the vent hole is recessed in the length direction of the main body plate to define a first notch; and the explosion-proof-valve holder comprises a baffle, wherein the baffle faces the main body plate and the vent hole, an edge of the baffle is recessed in the length direction of the main body plate to define a second notch, and the first notch is aligned with the second notch in the thickness direction of the main body plate.