Lid plate and battery

A battery, comprising a housing with an opening defined on at least one end, battery cells accommodated in the housing, and a lid plate;

• wherein the lid plate is configured to seal the opening of the housing, and the battery cells are connected with the current collecting disk in the lid plate, the lid plate comprises:
• a top lid;
• a lower plastic, wherein the lower plastic is stacked with the top lid, an accommodating space is defined on a side of the lower plastic away from the top lid, supporting protrusions are arranged in the accommodating space, and the supporting protrusions are configured to define a limiting space;
• and
• a current collecting disk located in the accommodating space, wherein the current collecting disk comprises a current collecting disk main body and a fuse structure, the fuse structure comprises a first part and a second part, the first part and the second part are both located in the limiting space, the first part is electrically connected to the top lid through the lower plastic, the second part is connected to the current collecting disk main body, the current collecting disk main body is located outside the limiting space and abuts against the supporting protrusions, and the first part, the second part and the current collecting disk main body are spaced apart from each other along a height direction of the supporting protrusions;
• wherein the lower plastic comprises an adapting part, the adapting part is located in the limiting space, and the first part is inserted into the adapting part;
• wherein a height of the limiting space is defined as a, and a sum of thicknesses of the first part and the second part is defined as b along a thickness direction of the lower plastic, a sum of thicknesses of the first part, the second part, and the adapting part between the first part and the second part is defined as c along the thickness direction of the lower plastic, and a >2b>c.