a plurality of energy-storage units sequentially arranged in a first direction, wherein each of the plurality of energy-storage units comprises an explosion-proof valve;

an isolation plate, wherein the isolation plate is located at one side of each of the plurality of energy-storage units where the explosion-proof valve is located, extends in the first direction, and defines a plurality of vents arranged at intervals in the first direction, and wherein each of the plurality of vents is at least partially aligned with a corresponding explosion-proof valve, and different explosion-proof valves are aligned with different vents; and

a first thermal insulator and a second thermal insulator, wherein the first thermal insulator and the second thermal insulator are both located at one side of the isolation plate away from the plurality of energy-storage units, the first thermal insulator and the second thermal insulator are spaced apart from each other in a second direction at two opposite sides of each of the plurality of explosion-proof valves, the first thermal insulator, the second thermal insulator, and the isolation plate cooperatively define a guide channel, two opposite ends of the guide channel are both in communication with an external environment and a space in which each of the plurality of explosion-proof valves faces the isolation plate, and the first direction intersects the second direction;

wherein the first thermal insulator comprises a first thermal insulation portion and a second thermal insulation portion that are connected to each other and arranged in the first direction; the second thermal insulator comprises a third thermal insulation portion and a fourth thermal insulation portion that are connected to each other and arranged in the first direction; the first thermal insulation portion faces the third thermal insulation portion, and a distance between the first thermal insulation portion and the third thermal insulation portion gradually increases in a direction from one end of the first thermal insulation portion close to the second thermal insulation portion and one end of the third thermal insulation portion close to the fourth thermal insulation portion to another end of the first thermal insulation portion away from the second thermal insulation portion and another end of the third thermal insulation portion away from the fourth thermal insulation portion; and the second thermal insulation portion faces the fourth thermal insulation portion, and a distance between the second thermal insulation portion and the fourth thermal insulation portion gradually increases in a direction from one end of the second thermal insulation portion close to the first thermal insulation portion and one end of the fourth thermal insulation portion close to the third thermal insulation portion to another end of the second thermal insulation portion away from the first thermal insulation portion and another end of the fourth thermal insulation portion away from the third thermal insulation portion;

wherein an angle α between a surface of the first thermal insulation portion facing the third thermal insulation portion and a surface of the third thermal insulation portion facing the first thermal insulation portion satisfies 5°≤α≤30°; an angle β between a surface of the second thermal insulation portion facing the fourth thermal insulation portion and a surface of the fourth thermal insulation portion facing the second thermal insulation portion satisfies 5°≤β≤30°;

wherein the isolation plate comprises a main body portion, a first mounting portion, a second mounting portion, a third mounting portion, and a fourth mounting portion, the main body portion defines the plurality of vents arranged at intervals in the first direction, and the first mounting portion, the second mounting portion, the third mounting portion, and the fourth mounting portion are sequentially arranged at intervals in the second direction on a surface of the main body portion away from the plurality of energy-storage units; the first mounting portion and the second mounting portion are both arranged at one side of each of the plurality of explosion-proof valves, the main body portion, the first mounting portion, and the second mounting portion cooperatively define a first fitting groove, the first thermal insulator is fitted with the first fitting groove; and the third mounting portion and the fourth mounting portion are both arranged at one side of each of the plurality of explosion-proof valves away from the first mounting portion and the second mounting portion, the main body portion, the third mounting portion, and the fourth mounting portion cooperatively define a second fitting groove, and the second thermal insulator is fitted with the second fitting groove;

wherein the energy-storage device further comprises a frame body and a cover plate, the frame body defines an accommodating groove for receiving the plurality of energy-storage units, the isolation plate, the first thermal insulator, and the second thermal insulator, and the cover plate seals the accommodating groove and is fixed to the frame body; the isolation plate further comprises a first elastic portion and a second elastic portion, and the first elastic portion and the second elastic portion are both arranged on the surface of the main body portion away from the plurality of energy-storage units; at least part of the first elastic portion is received in the first fitting groove and abuts against the first thermal insulator, so that an end face of the first thermal insulator away from the first elastic portion is in tight contact with a surface of the cover plate facing the accommodating groove; and at least part of the second elastic portion is received in the second fitting groove and abuts against the second thermal insulator, so that an end face of the second thermal insulator away from the second elastic portion is in tight contact with the surface of the cover plate facing the accommodating groove; and

wherein the first elastic portion comprises a first support sub-portion and a first protrusion sub-portion, the first support sub-portion is connected to a surface of the main body portion facing the first thermal insulator, the first protrusion sub-portion protrudes from a surface of the first support sub-portion away from the main body portion and abuts against the first thermal insulator, and a height h1 of the first protrusion sub-portion satisfies 0.5 mm≤h1≤1.5 mm in a direction from the first support sub-portion to the first protrusion sub-portion; and the second elastic portion comprises a second support sub-portion and a second protrusion sub-portion, wherein the second support sub-portion is connected to a surface of the main body portion facing the second thermal insulator, the second protrusion sub-portion protrudes from a surface of the second support sub-portion away from the main body portion and abuts against the second thermal insulator, and a height h2 of the second protrusion sub-portion satisfies 0.5 mm≤ h2≤1.5 mm in a direction from the second support sub-portion to the second protrusion sub-portion.