END COVER ASSEMBLY, BATTERY CELL, BATTERY AND POWER-CONSUMING APPARATUS

The present application provides an end cover assembly, a battery cell, a battery, an electric device and a method for preparing a battery cell and an apparatus for manufacturing a battery cell, and belongs to the technical field of battery manufacturing. The present application provides an end cover assembly, where the end cover assembly includes: a cover plate provided with a pressure relief hole; a fixing member fixed on the cover plate, the fixing member having a first through hole and a second through hole, and the first through hole being opposite to the pressure relief hole; and a gas permeable membrane covering at least a portion of the pressure relief hole, an edge part of the gas permeable membrane being connected to the fixing member, and a portion of the edge part being embedded into the second through hole, so as to prevent the edge part from moving relative to the fixing member. The present application further provides a battery cell, a battery and an electric device, all of which include the end cover assembly, thus having good safety performance and sealing performance. The present application further provides a method for preparing a battery cell and an apparatus for manufacturing a battery cell, which are used for manufacturing the above-mentioned battery cell.