Electrochemical cell and method for producing an electrochemical cell

2:

• The electrochemical cell according to claim 1, wherein the electrolyte filling opening (72, 74, 76) is arranged so as to be radially spaced apart from a central longitudinal axis of the electrode coil (20).

3:

• The electrochemical cell according to claim 1, wherein multiple surface regions (28, 30, 32) which are free of tabs are provided on the first end face of the electrode coil (20), and the current collector (70) has multiple electrolyte filling openings (72, 74, 76) which are each arranged in the region of a surface region (28, 30, 32) that is free of tabs.

4:

• The electrochemical cell according to claim 1, wherein the at least one surface region (28, 30, 32) that is free of tabs extends as far as a radially outer edge of the electrode coil (20).

5:

• The electrochemical cell according to claim 1, wherein the distance (X) between tabs (46, 50, 52) and/or between groups (40, 42, 44) of tabs (46, 50, 52) increases in a direction of the unwound electrode coil (20).

6:

• The electrochemical cell according to claim 1, wherein a width (B) of the tabs (46, 50, 52) and/or of groups (40, 42, 44) of tabs (46, 50, 52) increases in a direction of the unwound electrode coil (20).

7:

• The electrochemical cell according to claim 1, wherein the distance (X) between tabs (46, 50, 52) and/or groups (40, 42, 44) of tabs (46, 50, 52) is constant in a length portion (L) of the unwound electrode coil (20) corresponding to one winding.

8:

• The electrochemical cell according to claim 1, wherein a width (B) of the tabs (46, 50, 52) and/or of groups (40, 42, 44) of tabs (46, 50, 52) is constant in a length portion (L) of the unwound electrode coil (20) corresponding to one winding.

9:

• The electrochemical cell according to claim 1, wherein the current collector (70) is welded to the tabs (46, 50, 52) in a surface region (22, 24, 26) of the first end face which has tabs (46, 50, 52), wherein a surface of the weld (60, 62, 64) is smaller than the surface region (22, 24, 26) having the tabs (46, 50, 52).

10:

• The electrochemical cell according to claim 1, wherein the current collector (70) is discoid.

11:

• The electrochemical cell according to claim 1, wherein a diameter of the current collector (70) corresponds approximately to a diameter of the electrode coil (20).

12:

• The electrochemical cell according to claim 1, wherein at least one surface region (28, 30, 32) that is free of tabs is provided on a second end face of the electrode coil (20).

13:

• The electrochemical cell according to claim 1, wherein the surface regions (28, 30, 32) free of tabs, of the first end face, and surface regions (22, 24, 26) of the first end face having the tabs (46, 50, 52) are of approximately the same size.

14:

• The electrochemical cell according to claim 1, wherein the electrode coil (20) is arranged in a housing (12) and the current collector (70) is connected to the housing.

16:

• The method according to claim 15, wherein
• a. the distance between tabs (46, 50, 52) or groups (40, 42, 44) of tabs (46, 50, 52), and/or
• b. the width of tabs (46, 50, 52) and/or groups (40, 42, 44) of tabs (46, 50, 52) is set taking into account a detected size and/or shape of at least one surface region (28, 30, 32) that is free of tabs and/or at least one surface region (22, 24, 26) having tabs (28, 30, 32), of the end face of a previously manufactured electrochemical cell (10).

17:

• The method according to claim 15, wherein the size and/or shape of at least one surface region (28, 30, 32) that is free of tabs (28, 30, 32) and/or at least one surface region (28, 30, 32) having tabs (46, 50, 52) is detected, in particular optically.

18:

• The method according to claim 15, wherein electrolyte is poured in at the first end face of the electrode coil (20) and is sucked up by a surface region that is free of tabs, on a second end face.