An energy storage device, comprising: an electrode assembly; an end cover assembly, the end cover assembly comprising a top cover, a lower plastic member, and a terminal, wherein the terminal is fixed to the top cover, the top cover comprises a response member, the top cover defines an opening, and the response member is attached to the top cover and covers the opening; and the lower plastic member is arranged between the top cover and the electrode assembly, the lower plastic member comprises a first surface facing the top cover and a second surface facing away from the first surface, the lower plastic member comprises a grid structure, the grid structure defines vent holes extending through the grid structure in a thickness direction of the grid structure, the grid structure is arranged opposite the response member in the thickness direction of the energy storage device, and the vent holes are in communication with the opening; and a current collecting member, the current collecting member comprising a first connecting portion and a second connecting portion connected to the first connecting portion, wherein the first connecting portion is connected to the terminal, and the second connecting portion is connected to the electrode assembly; a surface of the second connecting portion facing the second surface is provided with welding protrusions, and the second connecting portion at least partially shelters the grid structure; and the grid structure defines an avoidance space dented from the second surface towards the first surface, and the welding protrusions is accommodated in the avoidance space; the avoidance space has a first portion, a second portion, and a third portion, the second portion is connected between the first portion and the third portion, a dented depth of the first portion and a dented depth of the third portion are both less than a dented depth of the second portion, at least part of the welding protrusions faces the second portion in the thickness direction of the energy storage device, a height of each of the welding protrusions is less than the dented depth of the second portion and greater than each of the dented depth of the first portion and the dented depth of the third portion. an electrode assembly; an end cover assembly, the end cover assembly comprising a top cover, a lower plastic member, and a terminal, wherein the terminal is fixed to the top cover, the top cover comprises a response member, the top cover defines an opening, and the response member is attached to the top cover and covers the opening; and the lower plastic member is arranged between the top cover and the electrode assembly, the lower plastic member comprises a first surface facing the top cover and a second surface facing away from the first surface, the lower plastic member comprises a grid structure, the grid structure defines vent holes extending through the grid structure in a thickness direction of the grid structure, the grid structure is arranged opposite the response member in the thickness direction of the energy storage device, and the vent holes are in communication with the opening; and a current collecting member, the current collecting member comprising a first connecting portion and a second connecting portion connected to the first connecting portion, wherein the first connecting portion is connected to the terminal, and the second connecting portion is connected to the electrode assembly; a surface of the second connecting portion facing the second surface is provided with welding protrusions, and the second connecting portion at least partially shelters the grid structure; and the grid structure defines an avoidance space dented from the second surface towards the first surface, and the welding protrusions is accommodated in the avoidance space; the avoidance space has a first portion, a second portion, and a third portion, the second portion is connected between the first portion and the third portion, a dented depth of the first portion and a dented depth of the third portion are both less than a dented depth of the second portion, at least part of the welding protrusions faces the second portion in the thickness direction of the energy storage device, a height of each of the welding protrusions is less than the dented depth of the second portion and greater than each of the dented depth of the first portion and the dented depth of the third portion.