Abstract: A method for controlling a charging current limiting value for a battery management system. In one example, the method includes determining, for a measured temperature and a prescribed state of charge, reference currents for various time intervals; calculating a corresponding reference time constant for each reference current by using a model for the calculation of a mean value of a charging current based on a continuous current; constituting a diagram for the relationship between the reference time constant and the reference current; determining a predictive time constant by the comparison of a measured value of a charging current with the reference currents; calculating a predictive limiting mean value of the charging current; and calculating a first predictive limiting value ipredS for a short predictive time tpredS, a second predictive limiting value ipredL for a long predictive time tpredL, and a third predictive limiting value ipredP for a continuous predictive time.

Abstract: A method for controlling a cell current limiting value for a battery management system. In some examples, the method includes determining quadratic reference currents of a battery cell; calculating a corresponding reference time constant for each reference current using a model for the calculation of a RMS value of a cell current by reference to a continuous current; constituting a diagram for the relationship between the reference time constant and the quadratic reference current; determining a predictive time constant by the comparison of a quadratic measured value of a cell current with the quadratic reference currents; calculating a predictive RMS limiting value of the cell current; calculating a first predictive limiting value for a short predictive time, a second predictive limiting value for a long predictive time, and a third predictive limiting value for a continuous predictive time; and calculating additional RMS limiting value for the cell current.

Abstract: A charging device (1) and a method for charging an electrical energy store (2), wherein the charging device (1) has an open-loop control unit (12) and a controller (9), and the charging device (1) is configured to charge the electrical energy store (2) to a defined state of charge within a predefined charging period and, in addition, to control a charging current and a secondary-reaction current of the electrical energy store (2).

Abstract: A charger (1) and a method for charging an electrical energy store (2), wherein the charger (1) has a control unit (12) and a regulation unit (9), wherein the charger (1) is designed to charge the electrical energy store (2) to a defined state of charge within a predefined charging time and, to this end, to set a charging current and a side reaction current of the electrical energy store (2).

Abstract: A method for determining a resistance parameter value of an electrical energy storage unit is disclosed, comprising the following steps: a) determining a current variable representing an electric current flowing into or out of the electrical energy storage unit; b) determining a first voltage variable, which represents an electrical voltage prevailing between two pole terminals of the electrical energy storage unit; c) determining a second voltage variable, which represents an electrical voltage and results from a mathematical model of the electrical energy storage unit, wherein the current variable determined in step a) is applied to the mathematical model and the latter comprises a resistance parameter which represents an internal resistance of the electrical energy storage unit and to which a first value is allocated; d) generating an adaptation value for the resistance parameter, wherein the adaptation value is dependent on a difference variable between the first voltage variable and the second voltage v

Abstract: The present invention relates to a method for controlling a regeneration procedure of a lithium battery cell (1) which comprises an anode (2), a cathode (3) and the regeneration electrode (4). The method comprises: detecting a current availability of cyclable lithium in the anode (2); detecting 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 actual availability of cyclable lithium in the anode (2) corresponds to a targeted 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 targeted availability of cyclable lithium in the cathode (3).

Abstract: A method for determining a resistance parameter value of an electrical energy storage unit is disclosed, comprising the following steps: a) determining a current variable representing an electric current flowing into or out of the electrical energy storage unit; b) determining a first voltage variable, which represents an electrical voltage prevailing between two pole terminals of the electrical energy storage unit; c) determining a second voltage variable, which represents an electrical voltage and results from a mathematical model of the electrical energy storage unit, wherein the current variable determined in step a) is applied to the mathematical model and the latter comprises a resistance parameter which represents an internal resistance of the electrical energy storage unit and to which a first value is allocated; d) generating an adaptation value for the resistance parameter, wherein the adaptation value is dependent on a difference variable between the first voltage variable and the second voltage v

Abstract: A method for controlling a temperature of a battery cell (22, 24) in a battery module (20), the method comprising the steps of: determining an initial temperature of the battery cell (22, 24); measuring a current (I) flowing into or out of the battery cell (22, 24); determining an actual temperature gradient of the battery cell (22, 24) using a thermal battery cell model described by a differential equation, for which input values comprise at least the determined initial temperature and the measured current (I); comparing the determined actual temperature gradient of the battery cell (22, 24) with a pre-defined desired temperature gradient; and automatically adjusting the current (I) flowing into or out of the battery cell (22, 24) according to a result of the comparison.

Abstract: A method for estimating a current open-circuit voltage characteristic of a battery, comprising acquiring a portion of an actual open-circuit voltage characteristic of the battery, detecting or defining a significant point in the acquired portion of the actual open-circuit voltage characteristic, identifying a point, in a characteristic curve of an anode potential of the battery and/or in a characteristic curve of a cathode potential of the battery, that is associated with the significant point, shifting and/or scaling the characteristic curve of the anode potential and the characteristic curve of the cathode potential on the basis of the position of the significant point with respect of the associated point, until the acquired portion is simulated by combination of the shifted and/or scaled characteristic curves, and calculating the current open-circuit voltage characteristic on the basis of the shifted and/or scaled characteristic curves.

Abstract: A method determines a potential of an anode and/or a potential of a cathode in a battery cell. The method measures a current flowing through the battery cell, determines a charge transfer resistance of the battery cell, ascertains a charge transfer resistance of the anode and a charge transfer resistance of the cathode, ascertains a depth of discharge, ascertains an anode residual voltage and a cathode residual voltage from the depth of discharge from an idle voltage, ascertains an anode excess potential from the charge transfer resistance of the anode and the current and ascertains a cathode excess potential from the charge transfer resistance of the cathode and the current. The method ascertains the potential of the anode from the anode residual voltage and the anode excess potential and ascertains the potential of the cathode from the cathode residual potential and the cathode excess potential.

Abstract: The present invention relates to a method for monitoring the state of the earthing contacts of a contactor controlled by an exciter coil, said contactor being operated as part of an isolation unit for galvanically isolating a voltage source from an electric consumer device connected to the voltage source, wherein a first power loss (22), which is transferred via the earthing contacts, and a second power loss (23), which is transferred via the exciter coil, are detected, and the first power loss (22) and the second power loss (23) are fed as input variables to a thermal model (21) of the contactor, the thermal model (21) determines an earthing contact temperature (24) according to at least one of the input variables and provides said contactor temperature as an output variable, and the provided earthing contact temperature (24) is evaluated.

Abstract: A method for determining a constant current limit value by means of which a first current which flows through a battery cell is limited, wherein the constant current limit value is determined on the basis of a first function which specifies a first profile of the first current, which first profile is dependent on a plurality of parameters. The plurality of parameters include a first voltage which is applied between two terminals of the battery cell, a second voltage which specifies a no-load voltage of the battery cell, and a time variable.

Abstract: The present invention relates to a method for controlling a regeneration procedure of a lithium battery cell (1) which comprises an anode (2), a cathode (3) and the regeneration electrode (4). The method comprises: detecting a current availability of cyclable lithium in the anode (2); detecting 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 actual availability of cyclable lithium in the anode (2) corresponds to a targeted 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 targeted availability of cyclable lithium in the cathode (3).

Abstract: The invention relates to a method for determining a potential (P1) of an anode (21) and/or a potential (P2) of a cathode (22) in a battery cell (2) which has a negative terminal (11) and a positive terminal (12), having the following steps:—measuring a current (I) flowing through the battery cell (2),—determining a charge transfer resistance of the battery cell (2),—ascertaining a charge transfer resistance (Rct1) of the anode (21) and/or a charge transfer resistance (Rct2) of the cathode (22) from the charge transfer resistance,—ascertaining an idle voltage of the battery cell (2),—ascertaining a depth of discharge of the battery cell (2) from the idle voltage,—ascertaining an anode residual voltage (U1) and/or a cathode residual voltage (U2) from the depth of discharge of the battery cell (2),—ascertaining an anode excess potential (N1) from the charge transfer resistance (Rct1) of the anode (21) and the current (I) and/or ascertaining a cathode excess potential (N2) from the charge Rct2 transfer resistance

Abstract: A method for controlling a temperature of a battery cell (22, 24) in a battery module (20), the method comprising the steps of: determining an initial temperature of the battery cell (22, 24); measuring a current (I) flowing into or out of the battery cell (22, 24); determining an actual temperature gradient of the battery cell (22, 24) using a thermal battery cell model described by a differential equation, for which input values comprise at least the determined initial temperature and the measured current (I); comparing the determined actual temperature gradient of the battery cell (22, 24) with a pre-defined desired temperature gradient; and automatically adjusting the current (I) flowing into or out of the battery cell (22, 24) according to a result of the comparison.

Abstract: The invention relates to a method for estimating an electrical capacitance of a battery, in particular, of an electrically drivable vehicle, comprising the steps: detecting of battery-specific state data; determining of a first value for the electrical capacitance by using an estimation algorithm and the battery-specific state data or by a measurement of the electrical capacitance; determining of a second value for the electrical capacitance by using an empirical aging model of the battery and the battery-specific state data; determining of a first weighted value for the electrical capacitance by multiplying the first value for the electrical capacitance by a first weighting factor; determining of a second weighted value for the electrical capacitance by multiplying the second value for the electrical capacitance by a second weighting factor; determining of a value sum by adding the weighted values for the electrical capacitance; determining of a weighting sum by adding the weighting factors; and determining

Abstract: A method for estimating a current open-circuit voltage characteristic of a battery, comprising acquiring a portion of an actual open-circuit voltage characteristic of the battery, detecting or defining a significant point in the acquired portion of the actual open-circuit voltage characteristic, identifying a point, in a characteristic curve of an anode potential of the battery and/or in a characteristic curve of a cathode potential of the battery, that is associated with the significant point, shifting and/or scaling the characteristic curve of the anode potential and the characteristic curve of the cathode potential on the basis of the position of the significant point with respect of the associated point, until the acquired portion is simulated by combination of the shifted and/or scaled characteristic curves, and calculating the current open-circuit voltage characteristic on the basis of the shifted and/or scaled characteristic curves.

Abstract: A method for determining a constant current limit value by means of which a first current which flows through a battery cell is limited, wherein the constant current limit value is determined on the basis of a first function which specifies a first profile of the first current, which first profile is dependent on a plurality of parameters. The plurality of parameters include a first voltage which is applied between two terminals of the battery cell, a second voltage which specifies a no-load voltage of the battery cell, and a time variable.

Abstract: Methods and systems for managing a battery system. The battery system includes at least on battery cell and sensors configured to measure a voltage and a current of the battery cell. The method includes receiving measured voltage and current, calculating the capacity of the battery cell and regulating the charging or discharging of the battery cell based on the capacity of the battery cell.

Abstract: The present invention relates to a method for monitoring the state of the earthing contacts of a contactor controlled by an exciter coil, said contactor being operated as part of an isolation unit for galvanically isolating a voltage source from an electric consumer device connected to the voltage source, wherein a first power loss (22), which is transferred via the earthing contacts, and a second power loss (23), which is transferred via the exciter coil, are detected, and the first power loss (22) and the second power loss (23) are fed as input variables to a thermal model (21) of the contactor, the thermal model (21) determines an earthing contact temperature (24) according to at least one of the input variables and provides said contactor temperature as an output variable, and the provided earthing contact temperature (24) is evaluated.