A battery, comprising: a plurality of battery cells, wherein a wall with the largest area among outer walls of each of the battery cells is provided parallel to a horizontal plane; and a binding component, configured to accommodate and bind the plurality of battery cells, wherein a reinforcing portion is provided at a part of the binding component parallel to the wall with the largest area, and the reinforcing portion is configured to reinforce a strength of the binding component so as to enhance a binding force of the binding component to walls with the largest area among outer walls of the plurality of battery cells; wherein the binding component comprises: an upper cover, wherein at least a part of the upper cover is provided at a top of the plurality of battery cells; and a lower case, wherein at least a part of the lower case is provided at a bottom of the plurality of battery cells, wherein the reinforcing portion is provided at a part of the upper cover provided at the top of the plurality of battery cells, and/or a part of the lower case provided at the bottom of the plurality of battery cells; wherein the binding component protrudes in a direction away from the battery cells to form the reinforcing portion, and a recess is formed on a surface of the binding component close to the battery cells in a region opposite to the reinforcing portion. a plurality of battery cells, wherein a wall with the largest area among outer walls of each of the battery cells is provided parallel to a horizontal plane; and a binding component, configured to accommodate and bind the plurality of battery cells, wherein a reinforcing portion is provided at a part of the binding component parallel to the wall with the largest area, and the reinforcing portion is configured to reinforce a strength of the binding component so as to enhance a binding force of the binding component to walls with the largest area among outer walls of the plurality of battery cells; wherein the binding component comprises: an upper cover, wherein at least a part of the upper cover is provided at a top of the plurality of battery cells; and a lower case, wherein at least a part of the lower case is provided at a bottom of the plurality of battery cells, wherein the reinforcing portion is provided at a part of the upper cover provided at the top of the plurality of battery cells, and/or a part of the lower case provided at the bottom of the plurality of battery cells; wherein the binding component protrudes in a direction away from the battery cells to form the reinforcing portion, and a recess is formed on a surface of the binding component close to the battery cells in a region opposite to the reinforcing portion. an upper cover, wherein at least a part of the upper cover is provided at a top of the plurality of battery cells; and a lower case, wherein at least a part of the lower case is provided at a bottom of the plurality of battery cells, wherein the reinforcing portion is provided at a part of the upper cover provided at the top of the plurality of battery cells, and/or a part of the lower case provided at the bottom of the plurality of battery cells; wherein the binding component protrudes in a direction away from the battery cells to form the reinforcing portion, and a recess is formed on a surface of the binding component close to the battery cells in a region opposite to the reinforcing portion.