END COVER ASSEMBLY, BATTERY CELL AND ELECTROLYTE INJECTION METHOD THEREFOR, BATTERY, AND POWER CONSUMPTION DEVICE

An end cover assembly, a battery cell and an electrolyte injection method therefor, a battery, and a power consumption device are provided. The end cover assembly may include an end cover provided with a through hole for injecting an electrolyte and an accommodating portion; a seal configured to seal the through hole; and a cover body covering at least part of the seal, the cover body including a limiting portion, the limiting portion being located within the accommodating portion to restrict the cover body from separating from the end cover, and the cover body being movable together with the seal by movement of the limiting portion relative to the accommodating portion, wherein when the cover body moves to a first position, the seal covers the through hole, and when the cover body moves to a second position, the seal avoids the through hole.