A battery, comprising a battery cell, a thermal management component and a support component, the battery cell comprising: at least two walls, the at least two walls comprising a first wall and a second wall that intersect with each other; and a pressure relief mechanism, the pressure relief mechanism being disposed at the first wall, and the pressure relief mechanism being configured to, when an internal pressure or a temperature of the battery cell reaches a threshold, be actuated to release the internal pressure; the thermal management component attached to the first wall, the thermal management component being configured to accommodate a fluid to adjust the temperature of the battery cell; the support component attached to the second wall, and configured to support the battery cell; wherein the thermal management component is configured such that when the pressure relief mechanism is actuated, emissions discharged from the battery cell pass through the thermal management component; wherein the battery cell further comprises: a housing, the housing comprising an accommodating chamber formed by a bottom wall and side walls and an opening; and a cover plate, the cover plate being suitable for closing the opening; wherein the first wall comprises at least one of the side walls, and the second wall is the bottom wall; wherein the battery further comprises: a case, the case comprising a cover body and a case shell, and the case shell and the cover body jointly forming an electrical chamber for accommodating the battery cell in an enclosing manner, wherein the support component is a portion of the case shell. at least two walls, the at least two walls comprising a first wall and a second wall that intersect with each other; and a pressure relief mechanism, the pressure relief mechanism being disposed at the first wall, and the pressure relief mechanism being configured to, when an internal pressure or a temperature of the battery cell reaches a threshold, be actuated to release the internal pressure; the thermal management component attached to the first wall, the thermal management component being configured to accommodate a fluid to adjust the temperature of the battery cell; the support component attached to the second wall, and configured to support the battery cell; wherein the thermal management component is configured such that when the pressure relief mechanism is actuated, emissions discharged from the battery cell pass through the thermal management component; wherein the battery cell further comprises: a housing, the housing comprising an accommodating chamber formed by a bottom wall and side walls and an opening; and a cover plate, the cover plate being suitable for closing the opening; a housing, the housing comprising an accommodating chamber formed by a bottom wall and side walls and an opening; and a cover plate, the cover plate being suitable for closing the opening; wherein the first wall comprises at least one of the side walls, and the second wall is the bottom wall; wherein the battery further comprises: a case, the case comprising a cover body and a case shell, and the case shell and the cover body jointly forming an electrical chamber for accommodating the battery cell in an enclosing manner, wherein the support component is a portion of the case shell. a case, the case comprising a cover body and a case shell, and the case shell and the cover body jointly forming an electrical chamber for accommodating the battery cell in an enclosing manner, wherein the support component is a portion of the case shell.