STRUCTURE AND METHOD FOR SEALING A BUTTON-TYPE LITHIUM CELL

A structure for sealing a button-type lithium cell includes a cell cover, a sealing ring and a cell casing. The cell cover includes an overlapping structure. The overlapping structure includes a first overlapping portion, a second overlapping portion and a third overlapping portion and the third overlapping portion includes a locking portion and a sealing portion. The cell casing includes a sealing structure. The sealing structure includes a first sealing portion, a second sealing portion, a third sealing portion and a fourth sealing portion. The first overlapping portion abuts against the fourth sealing portion through the sealing ring, the second overlapping portion abuts against the third sealing edge through the sealing ring, the locking portion of the third overlapping portion abuts against the second sealing edge through the sealing ring, and the sealing portion of the third overlapping portion abuts against the first sealing edge through the sealing ring.