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 . <EOS>