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A battery, in particular a lead-acid rechargeable battery, having at least one battery cell connecting element, which has a connector, which has at least one side surface, for connection to at least one plate on a lower face of the connector, and a welding lug, which is electrically conductively con

A battery, in particular a lead-acid rechargeable battery, having at least one battery cell connecting element, which has a connector, which has at least one side surface, for connection to at least one plate on a lower face of the connector, and a welding lug, which is electrically conductively connected to the connector and has a recess which is bounded by a boundary, wherein, in a section which is adjacent to the side surface of the connector, the boundary has a profile which corresponds to a contour of the side surface of the connector.

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1. A lead-acid rechargeable battery comprising at least one battery cell connecting element (10) comprising: (a) a connector (12), which has at least one side surface (22, 24a, 24b), for connection to at least one plate (16a, 16b) on a lower face (20) of the connector (12), and(b) a welding lug (14)

1. A lead-acid rechargeable battery comprising at least one battery cell connecting element (10) comprising: (a) a connector (12), which has at least one side surface (22, 24a, 24b), for connection to at least one plate (16a, 16b) on a lower face (20) of the connector (12), and(b) a welding lug (14), which is electrically conductively connected to the connector (12) and has an open recess (26) which is bounded by a boundary (28),wherein, in a section (30) which is adjacent to the side surface (22, 24a, 24b) of the connector (12) the boundary (28) has a profile which corresponds to a contour of the side surface (22, 24a, 24b) of the connector (12) and a portion of the boundary overlaps a portion of the side surface of the connector. 2. The battery as claimed in claim 1, wherein the boundary (28) has a linear profile in places. 3. The battery as claimed in claim 1, wherein the boundary (28) has two sections (30a, 30b) which are adjacent to one another and have a linear profile. 4. The battery as claimed in claim 3, wherein the recess (26) has an essentially polygonal plan area. 5. The battery as claimed in 4, wherein the recess (26) has an essentially triangular plan area. 6. The battery as claimed in claim 1, wherein the boundary (28) runs essentially equidistantly from the contour of the side surface (22, 24a, 24b) in a section (30) which is adjacent to the side surface (22, 24a, 24b) of the connector (12). 7. The battery as claimed in claim 6, wherein the boundary (28) runs essentially equidistantly from the contour of the side surface (22, 24a, 24b) in all the sections (30) which are adjacent to the side surface (22, 24a, 24b) of the connector (12). 8. The battery as claimed in claim 1, wherein the upper face (22) of the connector (12) has a concave contour, in particular an essentially V-shaped contour. 9. The battery as claimed in claim 1, wherein the connector (12) has an essentially cuboid shape and the welding lug (14) is arranged on a transverse face (18a, 18b) of the connector (12). 10. The battery as claimed in claim 9, wherein the recess (26) is arranged at the side, alongside the projection area which is obtained by projection of the cross section of the connector (12) in its longitudinal direction onto the welding lug (14). 11. The battery as claimed in claim 9, wherein the recess (26) is arranged above the projection area which is obtained by projection of the cross section of the connector (12) in its longitudinal direction onto the welding lug (14). 12. The battery as claimed in claim 10, that wherein the boundary (28) runs, in places, essentially parallel to an adjacent longitudinal side surface (24a, 24b) of the connector (12). 13. The battery as claimed in claim 1, wherein the connector (12) has an essentially cuboid shape, and the welding lug (14) is arranged on a longitudinal face (24a, 24b) of the connector (12). 14. The battery as claimed in claim 1, comprising two battery cell connecting elements (10) which are separated from one another by an electrically insulating separating wall (36), have mirror-image symmetry with respect to the separating wall (36), and are electrically connected to one another through a separating wall recess which is provided in the separating wall (36). 15. The battery as claimed in claim 1, wherein at least one plate (16a, 16b) is integrally formed on the lower face (20) of the connector (12). 16. The battery as claimed in claim 1, wherein the recess is provided on a face of the welding lug which is bounded by a boundary. 17. The battery as claimed in claim 1, wherein the section of the boundary is provided on a first side of an area of the welding lug, and the side surface of the connector is provided on a second side of an area of the welding lug, the distance between the section of the boundary of the recess and the side surface is constant in the area of the welding lug. 18. The battery as claimed in claim 1, wherein the section of the boundary is provided on a first side of an area of the welding lug, and the side surface of the connector is provided on a second side of an area of the welding lug, wherein the profile of the section of the boundary of the recess is parallel to the profile of the side surface of the connector. 19. The battery as claimed in claim 1, wherein the side surface is provided at an acute angle to the lower face, and the profile of the section of the boundary of the recess is parallel to the profile of the side surface.