Battery module

1. A battery module, comprising a plurality of round cells of identical dimensions, target charge capacity and voltage, which are grouped into a series of round cell stacks, which round cell stacks are arranged one behind the other in a row and which round cell stacks all consist of an identical plurality of round cells which lie in each round cell stack axis-parallel to the stack row direction, adjacent and on top of each other in identical position in the stack row direction, wherein

contact plates interposed between adjacent round cell stacks are provided, as well as end-side contact plates at the ends of the round cell stack row disposed in the stack row direction, which connect the round cells of each round cell stack in an electrically parallel manner at their poles disposed in the stack row direction, and wherein

all the round cells are arranged in such a way that all identical electrical poles face in the same direction and form a plurality of aligned round cell rows corresponding to the plurality of round cells per round cell stack, the round cells of each round cell row are respectively electrically connected in series via the interposed contact plates, wherein

at least the contact plates interposed between adjacent round cell stacks comprise protrusions for contacting the poles of the round cells and are electrically conductive at the protrusions and in the flat sections between the protrusions, wherein the protrusions press on the poles, but are not integrally connected to the poles, and wherein,

at the two ends of the round cell stack row, a respective pole plate rests on the outside on the end-side contact plate there, which pole plates are thicker-walled as compared to the contact plates, and which form the ends of the round cell stack row forming the poles of the battery module, and wherein

the protrusions have either identical dimensions and are provided on the contact plates at the positions corresponding to the axes of the round cell rows, wherein the protrusions each contact a pole of a round cell or both mutually facing poles of two adjoining round cells of a round cell row, so that all round cell poles are contacted via one of the protrusions,

or

the contact plates, which contact the plus poles of a round cell stack, comprise respective protrusions of identical dimensions on their sides facing the plus poles on the axes of the round cell rows, which protrusions each contact a plus pole of one of the round cells, and the contact plates, which contact the minus poles of a round cell stack, respectively comprise a plurality of protrusions with identical dimension on their sides facing the minus poles around the positions corresponding to the axes of the round cell regions, which protrusions each contact one of the minus poles of one of the round cells.

2. A battery module according to claim 1 , wherein the protrusions have identical dimensions and are provided on the contact plates at the positions corresponding to the axes of the round cell rows, wherein the protrusions each contact one pole of a round cell, and wherein

a pair of contact plates, which are in the form of sheet metal plates are interposed between the adjoining round cell stacks, wherein the protrusions are formed as nubs impressed into the contact plates.

3. A battery module according to claim 2 , wherein also the two end-side contact plates are formed as sheet metal plates with impressed nubs, and wherein all of the contact plates are identical.

4. A battery module according to claim 3 , wherein the contact plates interposed between the round cell stacks and the two end-side contact plates are formed as sheet copper plates.

5. A battery module according to claim 1 , wherein the protrusions have identical dimensions and are provided on the contact plates at the positions corresponding to the axes of the round cell rows, wherein the protrusions each contact both mutually facing poles of two mutually adjoining round cells of a round cell row, and wherein a respective contact plate formed as a printed circuit board or a pair of contact plates formed as printed circuit boards is or are interposed between adjoining round cell stacks, and also the end-side contact plates, which are provided at the ends of the round cell stack row disposed in the stack row direction, are formed as printed circuit boards, wherein the contact plates comprise through-bores at the positions corresponding to the axes of the round cell rows, and wherein the protrusions are formed as sleeves or bolts, consisting of copper, and are inserted into the through-bores, or as solder points placed there, wherein each of the protrusions of a contact plate is connected in parallel to each other protrusion of the contact plate via conductor tracks on the respective contact plate, and wherein all of the contact plates are identical.

6. A battery module according to claim 1 , wherein the contact plates contacting the plus poles of one of the round cell stacks have protrusions of identical dimensions on their sides facing the plus poles on the axes of the round cell rows, which each contact a plus pole of a round cell, and the contact plates contacting the minus poles of one of the round cell stacks comprise a plurality of protrusions of identical dimensions on their sides facing the minus poles around positions corresponding to the axes of the round cell regions, which each contact one of the minus poles of a round cell, wherein a respective contact plate, which is formed as a sheet metal plate, is interposed between adjoining round cell stacks, and at the ends of the round cell stack row situated in the stack row direction an end-side contact plate is provided, respectively, which is formed as a sheet metal plate, wherein the protrusions are formed as nubs impressed into the contact plates, wherein also the two end-side contact plates are formed with impressed nubs.

7. A battery module according to claim 6 , wherein the protrusions of each of a plurality of protrusions assigned to a minus pole are distributed concentrically and circumferentially uniformly around the associated axis of the respective round cell row.

8. A battery module according to claim 7 , wherein the contact plates interposed between the adjacent round cell stacks each have the central protrusions on their sides facing the plus poles of the one round cell stack, and on their sides assigned to the minus poles of the other round cell stack the pluralities of protrusions arranged around the axis of the round cell rows.

9. A battery module according to claim 8 , wherein each of a plurality of protrusions assigned to a minus pole consists of three protrusions.

10. A battery module according to claim 8 , wherein all of the contact plates interposed between the round cell stacks are identical.

11. A battery module according to claim 10 , wherein each of the contact plates

interposed between the round cell stacks and each of the end-side contact plates are formed as a sheet copper plate.

12. A battery module according to claim 6 , wherein each of the end-side contact plates comprises either the central protrusions or the pluralities of protrusions, only.

13. A battery module according to claim 1 , wherein the batter module comprises at least one clamping means acting on one of the two ends of the round cell stack row in order to exert a clamping force acting in the stack row direction on the round cell stack row, wherein the clamping means act on the pole plates.

14. A battery module according to claim 13 , wherein the contact plates, the end contact plates and the pole plates have recesses through which tie rods are guided, which exert the clamping force on the round cell stack row with the clamping means formed as nuts.

15. A battery module according to claim 1 , wherein the round cells are arranged in groups in a receptacle adapted to form the row of round cell stacks.

16. A battery module according to claim 15 , wherein the receptacle has a base and two longitudinal flanks which are fixedly connected thereto and extend longitudinally along the base and upwards, wherein the receptacle has, at the ends of the two longitudinal flanks, transverse walls, on which the clamping means are supported which press from the outside against one or both ends of the round cell stack row, wherein the pole plate there is movably accommodated in the receptacle in the stack row direction.

17. A battery module according to claim 16 , wherein a detachable cover adapted to the receptacle is provided, which forms, together with the receptacle, a housing which is closed at least at the base, top and longitudinal sides, from which connecting lines that are electrically connected to the pole plates are guided to the outside or which has connections which are electrically connected to the pole plates.

18. A battery module according to claim 15 , wherein the round cell stacks comprise layers of round cells which are stacked on top of each other, wherein the round cells of each of these round cell layers lie directly on the round cells of the respective round cell layer located underneath.

19. A battery module according to claim 1 , wherein the contact plates interposed between the round cell stacks are inserted loosely between the round cell stacks.

20. A battery module according to claim 19 , wherein also the end-side contact plates are inserted loosely into the receptacle.