Sealed battery
The purpose of the present disclosure is to provide a sealed battery that can expand a joint area of an electrode lead with respect to a sealing body or the like without using a large-width electrode lead. A sealed battery, which is an example of an embodiment, comprises: an electrode body having an electrode lead; a bottomed tubular exterior can that accommodates the electrode body; and a sealing body that plugs an opening section of the exterior can. The electrode lead is welded, with energy beams, to the inner surface of the sealing body. In addition, the electrode lead includes: a first main surface making contact with the inner surface of the sealing body; and a second main surface on the opposite side of the first main surface, wherein the first main surface and the second main surface are formed in no-parallel with each other.
1 . A method of manufacturing a sealed battery comprising:
an electrode assembly comprising an electrode lead;
an outer can enclosing the electrode assembly, the outer can having a cylindrical shape with a closed bottom; and
a sealing assembly closing an opening of the outer can,
wherein the electrode lead is connected by energy beam welding to at least one of an inner face of the sealing assembly and an inner face of the outer can,
the electrode lead comprises
a first face in contact with the inner face of the sealing assembly or the inner face of the outer can,
a second face on the other side opposite from the first face,
the electrode lead having a length direction longer than a width direction
and when viewed in the cross-section in regards to the first face and the second face are arranged in non-parallel to each other along the width direction of the electrode lead, and
the energy beam welding is performed by applying an energy beam substantially perpendicular to the second face.
2 . The manufacturing method of a sealed battery according to claim 1 , wherein
in a lateral cross-sectional view of the electrode lead, an angle θ formed between a virtual line α along the first face and a virtual line β along the second face is 1° to 45°.
3 . The manufacturing method of a sealed battery according to claim 1 , wherein the ratio of a maximum thickness T2 of the electrode lead to a minimum thickness T1 (T2/T1) is 0<T2/T1≤100.