Battery, comprising: a plurality of battery cells comprising a first battery cell and a second battery cell adjacent to each other, the first battery cell comprising a pressure relief mechanism, the pressure relief mechanism being disposed on a first wall of the first battery cell, and the pressure relief mechanism being configured to be actuated when an internal pressure or temperature of the first battery cell reaches a threshold, to relieve the internal pressure, wherein a first battery cell group and a second battery cell group among the plurality of battery cells are arranged side by side along a second direction, the first battery cell group comprises at least two first battery cells arranged side by side along a third direction, the second battery cell group comprises at least two second battery cells arranged side by side along the third direction; a fire-fighting pipeline configured to accommodate a fire-fighting medium and discharge the fire-fighting medium toward the first wall when the pressure relief mechanism is actuated; and a blocking component protruding from the first wall along a first direction, the first direction being a direction perpendicular to the first wall, the first direction, the second direction and the third direction are perpendicular to each other, and the blocking component being configured to block the fire-fighting medium discharged from the fire-fighting pipeline from flowing from the first battery cell to the second battery cell; wherein a part of the blocking component is clamped between a second wall of the first battery cell and a second wall of the second battery cell, and both the second wall of the first battery cell and the second wall of the second battery cell are perpendicular to the first wall; a plurality of isolation components being disposed between the first battery cell group and the second battery cell group, each isolation component of the plurality of isolation components clamped between the second wall of the first battery cell and the second wall of the second battery cell, the plurality of isolation components being located at one side of the blocking component along the first direction and abutting against an end portion of the blocking component, the each isolation component is configured to block heat transfer between the first battery cell and the second battery cell; wherein hardness of the blocking component is greater than hardness of the plurality of isolation components, and a melting point of the blocking component is higher than a melting point of the plurality of isolation components. a plurality of battery cells comprising a first battery cell and a second battery cell adjacent to each other, the first battery cell comprising a pressure relief mechanism, the pressure relief mechanism being disposed on a first wall of the first battery cell, and the pressure relief mechanism being configured to be actuated when an internal pressure or temperature of the first battery cell reaches a threshold, to relieve the internal pressure, wherein a first battery cell group and a second battery cell group among the plurality of battery cells are arranged side by side along a second direction, the first battery cell group comprises at least two first battery cells arranged side by side along a third direction, the second battery cell group comprises at least two second battery cells arranged side by side along the third direction; a fire-fighting pipeline configured to accommodate a fire-fighting medium and discharge the fire-fighting medium toward the first wall when the pressure relief mechanism is actuated; and a blocking component protruding from the first wall along a first direction, the first direction being a direction perpendicular to the first wall, the first direction, the second direction and the third direction are perpendicular to each other, and the blocking component being configured to block the fire-fighting medium discharged from the fire-fighting pipeline from flowing from the first battery cell to the second battery cell; wherein a part of the blocking component is clamped between a second wall of the first battery cell and a second wall of the second battery cell, and both the second wall of the first battery cell and the second wall of the second battery cell are perpendicular to the first wall; a plurality of isolation components being disposed between the first battery cell group and the second battery cell group, each isolation component of the plurality of isolation components clamped between the second wall of the first battery cell and the second wall of the second battery cell, the plurality of isolation components being located at one side of the blocking component along the first direction and abutting against an end portion of the blocking component, the each isolation component is configured to block heat transfer between the first battery cell and the second battery cell; wherein hardness of the blocking component is greater than hardness of the plurality of isolation components, and a melting point of the blocking component is higher than a melting point of the plurality of isolation components.