An electrode assembly, comprising: at least one first electrode plate which comprises a first body portion and a first tab, wherein the first body portion has a first end portion in a first direction, and the first tab is connected to the first end portion; and at least one second electrode plate whose polarity is opposite to that of the first electrode plate, wherein the second electrode plate comprises a second body portion and a second insulation portion connected to the second body portion, the first body portion and the second body portion are stacked in a direction perpendicular to the first direction, the second body portion has a second end portion close to the first tab in the first direction, and the second insulation portion covers at least part of the second end portion so as to separate the first tab from the second end portion when the first tab is bent; wherein the second insulation portion comprises a second coverage zone and a second connection zone connected to the second coverage zone, the second coverage zone is disposed on a side of the second body portion in the first direction and covers at least part of the second end portion, and the second connection zone is connected to the second body portion; and the second connection zone is at least partially located between the first body portion and the second body portion so as to separate the second body portion from the first tab when the first tab is inserted between the first body portion and the second body portion; and wherein the first electrode plate further comprises a first insulation portion, wherein the first insulation portion comprises a first coverage zone and a first connection zone connected to the first coverage zone, and the first coverage zone is disposed on a side of the first body portion in the first direction and covers at least part of the first end portion; and the first connection zone is at least partially located between the first body portion and the second body portion and is connected to the first body portion; and wherein the first electrode plate is a positive electrode plate and the second electrode plate is a negative electrode plate; and in a direction farther away from the first tab and parallel to the first direction, an edge of the second connection zone farther away from the second coverage zone does not exceed an edge of the first connection zone farther away from the first coverage zone. at least one first electrode plate which comprises a first body portion and a first tab, wherein the first body portion has a first end portion in a first direction, and the first tab is connected to the first end portion; and at least one second electrode plate whose polarity is opposite to that of the first electrode plate, wherein the second electrode plate comprises a second body portion and a second insulation portion connected to the second body portion, the first body portion and the second body portion are stacked in a direction perpendicular to the first direction, the second body portion has a second end portion close to the first tab in the first direction, and the second insulation portion covers at least part of the second end portion so as to separate the first tab from the second end portion when the first tab is bent; wherein the second insulation portion comprises a second coverage zone and a second connection zone connected to the second coverage zone, the second coverage zone is disposed on a side of the second body portion in the first direction and covers at least part of the second end portion, and the second connection zone is connected to the second body portion; and the second connection zone is at least partially located between the first body portion and the second body portion so as to separate the second body portion from the first tab when the first tab is inserted between the first body portion and the second body portion; and wherein the first electrode plate further comprises a first insulation portion, wherein the first insulation portion comprises a first coverage zone and a first connection zone connected to the first coverage zone, and the first coverage zone is disposed on a side of the first body portion in the first direction and covers at least part of the first end portion; and the first connection zone is at least partially located between the first body portion and the second body portion and is connected to the first body portion; and wherein the first electrode plate is a positive electrode plate and the second electrode plate is a negative electrode plate; and in a direction farther away from the first tab and parallel to the first direction, an edge of the second connection zone farther away from the second coverage zone does not exceed an edge of the first connection zone farther away from the first coverage zone.