Rechargeable battery including a terminal connecting member

1. A rechargeable battery, comprising:

an electrode assembly, the electrode assembly including a positive electrode and a negative electrode;

a case accommodating the electrode assembly;

a terminal electrically connected to the electrode assembly, the terminal being exposed outside the case;

a terminal connecting member extending outside of the case from an interior thereof, the terminal connecting member:

electrically connecting the electrode assembly and the terminal, and

including an electrolyte solution inlet therein; and

a sealing cap coupled with an outer side of the terminal connecting member, the sealing cap covering the electrolyte solution inlet, wherein:

the terminal connecting member includes a groove into which the sealing cap is inserted, the groove having a width greater than a width of the electrolyte solution inlet,

the width of the groove at a widest point thereof is about the same as a width of an adjacent top end of the terminal connecting member such that the groove at the widest point thereof abuts an edge of the top end of the terminal connecting member and abuts an outer edge of the sealing cap,

the edge of the top end of terminal connecting member, the terminal, and the outer edge of the sealing cap are adjacent to one another and are fixed by a single continuous weld, and

the terminal has a plate shape.

2. The rechargeable battery as claimed in claim 1 , wherein an upper part of the terminal connecting member includes a rivet thereon.

3. The rechargeable battery as claimed in claim 1 , further comprising a lower cap coupled with a bottom end of the electrolyte solution inlet.

4. The rechargeable battery as claimed in claim 3 , wherein:

a bottom end of the electrolyte solution inlet includes a lower step, the lower step having a transverse cross-sectional area greater than a transverse cross-sectional area of the electrolyte solution inlet, and

the lower cap is coupled with the lower step.

5. The rechargeable battery as claimed in claim 3 , wherein, when an electrolyte solution is injected, the lower cap is pressed by a connected wire and is inserted into and coupled with the bottom end of the electrolyte solution inlet.

6. The rechargeable battery as claimed in claim 1 , wherein the terminal includes a terminal column inserted thereinto, the terminal column protruding upwardly.

7. The rechargeable battery as claimed in claim 1 , wherein the groove has an arc shaped longitudinal cross-section.

8. The rechargeable battery as claimed in claim 1 , wherein:

a top surface of the sealing cap is substantially coplanar with a top surface of the terminal, and

an edge of a top end of the sealing cap abuts an edge of the top end of the terminal connecting member.

9. The rechargeable battery as claimed in claim 1 , wherein the terminal connecting member includes an upper step below the groove, the upper step having a transverse cross-sectional area that is greater than a transverse cross-sectional area of the electrolyte solution inlet and less than a transverse cross-sectional area of the groove.