Battery case sealing method and a sealed battery manufacturing method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKatsuya Shikata
Life of this patent
Estimating the term…
Abstract
In a battery case sealing method, a lid is fitted to an opening of a battery case, and then a side wall on an inner side of the battery case and a side surface of the lid are brought into contact with each other. The side wall forms the opening. In a state where the side wall on the inner side of the battery case is in contact with the side surface of the lid, a boundary portion between the side wall and the side surface of the lid is welded by irradiating a laser beam in a direction from an outer side of the battery case toward the inner side of the battery case in a thickness direction of the lid.
Claims12
A battery case sealing method for sealing an opening of a battery case with a lid, the battery case having a rectangular shape and the opening having a rectangular shape, the lid having a rectangular plate shape that corresponds to the rectangular shape of the opening, and wherein an electrode body is housed in the battery case, comprising:
- fitting the lid to the opening of the battery case;
- in a state where the lid is fitted to the opening, bringing a side wall on an inner side of the battery case and a side surface of the lid into contact with each other, the side wall defining the opening, wherein the side wall on the inner side of the battery case includes a first portion that is brought into contact with an edge portion of a first surface of the lid, wherein the first surface of the lid is located on the inner side of the battery;
- when bringing the first portion of the battery case and the edge portion of the lid into contact with each other, pressing, with a lid pressing member, a second surface of the lid located on the outer side of the battery case in order to restrict a change in attitude of the lid with respect to the battery case;
- when bringing the first portion of the battery case and the edge portion of the lid into contact with each other, with the edge portion of the lid serving as a fulcrum, a second portion of the side wall is bent toward the outer side of the battery case to a degree that forms a gap between the second portion and the lid;
- and
- after forming the gap, welding a boundary portion between the side wall and the side surface of the lid by irradiating a laser beam into the gap, in a direction from an outer side of the battery case toward the inner side of the battery case in a thickness direction of the lid.
A battery case sealing method for sealing an opening of a battery case with a lid, the battery case having a rectangular shape and the opening having a rectangular shape, the lid having a rectangular plate shape that corresponds to the rectangular shape of the opening, and wherein an electrode body is housed in the battery case, comprising:
- fitting the lid to the opening of the battery case;
- in a state where the lid is fitted to the opening, bringing a side wall on an inner side of the battery case and a side surface of the lid into contact with each other, the side wall defining the opening, wherein the side wall on the inner side of the battery case includes a first portion that is brought into contact with an edge portion of a first surface of the lid, wherein the first surface of the lid is located on the inner side of the battery;
- wherein the side wall on the inner side of the battery case includes a second portion, and the second portion is closer to the opening than the first portion, and the side wall on the outer side of the battery case includes a third portion that is more spaced apart from the opening than the first portion in the thickness direction of the lid;
- and
- when bringing the side wall on the inner side of the battery case and the side surface of the lid into contact with each other, the third portion is pressed, by a pressing member located below the edge portion, from the outer side of the battery case toward the inner side of the battery case, with the edge portion of the lid serving as a fulcrum, so that the second portion of the side wall is bent toward the outer side of the battery case to a degree that forms a gap between the second portion and the lid;
- and
- after forming the gap, welding a boundary portion between the side wall and the side surface of the lid by irradiating a laser beam into the gap, in a direction from an outer side of the battery case toward the inner side of the battery case in a thickness direction of the lid.
Dependencies are inferred from the claim text.