Method for determining a pressure inside a housing of a battery cell, and battery cell

Abstract

The invention relates to a method for determining a pressure inside a housing (3) of a battery cell (2), comprising a measuring electrode (70) arranged inside the housing (3) and an electrode unit (10) arranged inside the housing (3), having a cathode, an anode (21) and a separator (18) impregnated with an electrolyte, wherein the housing (3) is at least partially electrically conductive. In addition, an electrical impedance between the measuring electrode (70) and the housing (3) is measured, and the pressure inside the housing (3) is determined from the electrical impedance. The invention also relates to a battery cell (2) comprising a housing (3) that is at least partially electrically conductive, a measuring electrode (70) arranged inside the housing (3), and an electrode unit (10) arranged inside the housing (3) and having a cathode, an anode (21) and a separator (18) impregnated with an electrolyte. In addition, the separator (18) is arranged between the housing (3) and the measuring electrode (70) in such a way that an electrical impedance between the measuring electrode (70) and the housing (3) can be measured, or an insulation layer (50) is provided in contact with the housing (3), which is arranged between the housing (3) and the measuring electrode (70) in such a way that an electrical impedance between the measuring electrode (70) and the housing (3) can be measured.

Dependencies are inferred from the claim text.