Method for controlling a regeneration process of a lithium-ion battery cell that comprises an anode, a cathode and a regeneration electrode

A method for controlling a regeneration process of a lithium-ion battery cell (1) that comprises a regeneration electrode (4), an anode (2) positioned on a first side of the regeneration electrode (4), a first separator (9) positioned between the anode (2) and the regeneration electrode (4), a cathode (3) positioned on a second side of the regeneration electrode (4), the second side being opposite to the first side, a second separator (10) positioned between the cathode (3) and the regeneration electrode (4), the regeneration electrode (4) oriented parallel to the anode (2) and the cathode (3), the method comprising:

• sensing a current availability of cyclable lithium in the anode (2),
• sensing a current availability of cyclable lithium in the cathode (3),
• passing a first current (I1) between the anode (2) and the regeneration electrode (4) until the current availability of cyclable lithium in the anode (2) corresponds to a target availability of cyclable lithium in the anode (2), and
• passing a second current (I2) between the cathode (3) and the regeneration electrode (4) until the current availability of cyclable lithium in the cathode (3) corresponds to a target availability of cyclable lithium in the cathode (3)
• wherein no additional anode is positioned on the second side of the regeneration electrode (4) and no additional cathode is positioned on the first side of the regeneration electrode (4)
• wherein the first current (I1) is provided via a first current source (12) connected between the anode (2) and the regeneration electrode (4) and the second current (I2) is provided via a second current source (13) connected between the cathode (6) and the regeneration electrode (4).