Assembled structure of pole and pole current collector disk, and battery

A battery, comprising a housing and a cell disposed inside the housing, wherein the housing is of a groove body structure, the housing comprises a housing bottom portion and a housing bottom end surface, wherein the battery is provided with an assembled structure of a pole and a pole current collector disk;

• the assembled structure of the pole and the pole current collector disk comprises a positive pole, a positive current collector disk, a first insulating member and a second insulating member, and the second insulating member is disposed between the positive current collector disk and the first insulating member;
• the positive pole comprises a conductive end, a connection end and a connection rod, the conductive end and the connection end are connected through the connection rod, and a width of the conductive end and a width of the connection end are both larger than a width of the connection rod;
• the connection rod sequentially penetrates through the first insulating member and the second insulating member, the first insulating member is closer to the conductive end than the second insulating member, and an accommodating space is formed between the first insulating member and the second insulating member;
• the positive current collector disk comprises a welding disk and a conductive protrusion, the conductive protrusion is disposed on an end surface of the welding disk facing the second insulating member, and an end surface of the connection end facing the positive current collector disk is provided with a first groove, a contact portion of the positive current collector disk and the positive pole is only an end surface of the conductive protrusion facing away the welding disk and a groove bottom surface of the first groove.