Abstract: The invention proceeds from a method of operating a cell system (22) having at least one electrochemical cell (24). It is proposed that at least one operational parameter of a temperature control unit (30) of the cell system (22) is set depending on at least one internal temperature parameter of the cell system (22).

Abstract: The invention proceeds from a method for determining at least one cell parameter, in particular an aging parameter, of a cell system (30) comprising at least one electrochemical cell (32). It is proposed that the cell parameter be determined based on a physical model of the cell system (30) depending on operational parameters of the cell system (30). (FIG.

Abstract: The invention relates to a method for monitoring an electrochemical system, in particular a high-temperature electrochemical system, preferably a fuel cell system, wherein, in at least one method step, a functionality of the electrochemical system is determined on the basis of at least one machine learning process (14, 16). According to the invention, the functionality is determined using a degradation model which is at least partly separated from a reference model of the electrochemical system.

Abstract: The present invention relates to a safety device (20) for decreasing the total power output of a battery element (12) comprising at least one component (26) with porous material, especially of a Li-ion battery element (16), in response to a trigger signal, which safety device (20) includes a compression unit (22) for actively compressing at least the component (26) with the porous material, wherein the compression unit (22) is suitable for compressing the porous material in such way that the output current of the battery element (12) is significantly reduced as a result of a reduction of the porosity of the porous material due to the compression. The present invention further relates to a corresponding safety system (14), a corresponding battery unit (10) and a corresponding method for discharging a battery element (12).

Abstract: The invention relates to a battery cell, in particular a lithium ion battery cell, having a cathode (3) comprising a cathode active material (333) and having an anode (1) comprising an anode active material (111), wherein the cathode active material (333) and/or the anode active material (111) is/are structured in such a way that between contiguous cathode active material regions (333a) and/or between contiguous anode active material regions (111a) there are hollow spaces (4) which spatially separate the contiguous cathode active material regions (333a) and/or the contiguous anode active material regions (111a) from one another and wherein the hollow spaces (4) are at least partly filled with an electrically insulating material (5).