Abstract: The invention relates to a battery cell unit (10) which comprises a rechargeable electrochemical battery cell (11), a monitoring-and-control unit (12) connected in parallel to said battery cell (11), and a coupling unit in the form of a half bridge (14) comprising a first power semi-conductor (15) and a second power semi-conductor (16). Said battery cell unit (10) is equipped with an integrated circuit (20) that has a noise source (21). A switch-on delay can be achieved by means of said noise source (21). The invention also relates to a switching method for a battery system which comprises a plurality of intrinsically-safe battery cell units (10).

Abstract: The invention relates to an electrochemical energy accumulator and to a method for switching cells of an electrochemical energy accumulator. According to the invention, the following steps are carried out: a first desired value of an output voltage of the energy accumulator is determined, a first probability for switching a first cell is determined, said first probability predefining connection and/or disconnection of the first cell to or from the electromechanical energy accumulator, a first common state of charge threshold value being defined for all cells of the electrochemical energy accumulator in accordance with the first desired value, and the first cell is disconnected independently from the first probability value as long as the charge state lies below the charge state threshold value.

Abstract: A method for the switching of a number of battery cells in a battery which is configured as an electrochemical storage device, wherein each of the battery cells is electrically connected to the battery in accordance with a corresponding first probability P1i, and is electrically disconnected from the battery in accordance with a corresponding second probability P2i, and wherein the battery cells are mutually connectable in series. According to the method, a performance factor Gi is calculated for each battery cell as a sum of a function, which, specifically, is linearly dependent upon a state of charge LZi of the corresponding battery cell, and a second function which, specifically, is linearly dependent upon a product of a current value of a current which flows in the corresponding battery cell when the corresponding battery cell is electrically connected to the battery and the internal resistance of the corresponding battery cell.

Abstract: A method for connecting a plurality of battery cells of a battery, wherein the battery cells are each electrically coupled to the battery with a corresponding first probability and are each electrically decoupled from the battery with a corresponding second probability. A first quality factor is calculated for each battery cell depending on a state of charge and on a state of ageing of the corresponding battery cell. An average first quality factor, corresponding to an average value of the first quality factors of the battery cells, is also determined. A second quality factor is calculated for each battery cell as a function of the difference between the first quality factor of the corresponding battery cell and the average first quality factor. The first probability and the second probability are determined for each battery cell based on the second quality factor of the corresponding battery cell.

Abstract: Disclosed are an electrochemical energy store and a method for connecting cells of an electrochemical energy store. According to the invention, the following steps are carried out: determination of a first set-point for an output voltage of the energy store; determination of a first probability (Pon) for connecting a first cell, the first probability (Pon) pre-determining the connection of the first cell to the electrochemical energy store; definition of a first condition limit value and a second condition limit value for all cells of the electrochemical energy store; calculation of a first condition value for the first cell, and independently of the first probability (Pon), non-connection of the first cell to the electrochemical energy store at a first time, if the condition value lies below the first condition limit value.

Abstract: The invention relates to a method and to a device for measuring a battery cell current through a battery cell unit. After the battery cell unit has been switched off, inductively stored energy from the battery cell unit is discharged (S1) by means of a discharging unit, wherein the inductively stored energy from the battery cell unit is energy stored by means of an inductive behavior of the battery cell unit, a time period in which the inductively stored energy from the battery cell unit has fallen to a predefined threshold value is determined (S2), and a battery cell current is determined (S3) on the basis of the time period determined.

Abstract: The present invention relates to a method for connecting multiple battery cells (21) of a battery (11), wherein the multiple battery cells (21) can be connected in series to one another, and a single first control variable P1 and a single second control variable P2 are predefined for all the battery cells (21). In this context, in order to generate a desired output voltage of the battery (11), each battery cell (21) is electrically coupled to the battery (11) with a corresponding first probability, defined as a function of the first control variable P1, and in each case electrically decoupled from the battery (11) with a corresponding second probability, defined as a function of the second control variable P2. In addition, a value of the first control variable P1 and a value of the second control variable P2 are respectively predefined repeatedly with an update frequency which is dependent on the desired output voltage of the battery (11) which is to be generated.

Abstract: The invention relates to a battery cell unit (10) which comprises a rechargeable electrochemical battery cell (11), a monitoring-and-control unit (12) connected in parallel to said battery cell (11), and a coupling unit in the form of a half bridge (14) comprising a first power semi-conductor (15) and a second power semi-conductor (16). Said battery cell unit (10) is equipped with an integrated circuit (20) that has a noise source (21). A switch-on delay can be achieved by means of said noise source (21). The invention also relates to a switching method for a battery system which comprises a plurality of intrinsically-safe battery cell units (10).

Abstract: The present invention relates to a method for connecting multiple battery cells (21) of a battery (11), wherein the multiple battery cells (21) can be connected in series to one another, and a single first control variable P1 and a single second control variable P2 are predefined for all the battery cells (21). In this context, in order to generate a desired output voltage of the battery (11), each battery cell (21) is electrically coupled to the battery (11) with a corresponding first probability, defined as a function of the first control variable P1, and in each case electrically decoupled from the battery (11) with a corresponding second probability, defined as a function of the second control variable P2. In addition, a value of the first control variable P1 and a value of the second control variable P2 are respectively predefined repeatedly with an update frequency which is dependent on the desired output voltage of the battery (11) which is to be generated.

Abstract: The present invention relates to a method for connecting a plurality of battery cells (21) of a battery (111) which is in the form of an electrochemical energy store, wherein the battery cells (21) are each electrically coupled to the battery (111) with a corresponding first probability P1i and are each electrically decoupled from the battery (111) with a corresponding second probability P2i. In this case, the battery cells (21) are connected to one another in series. In the method, a first quality factor Gi is calculated for each battery cell (21) depending on a state of charge LZi and on a state of ageing AZi of the corresponding battery cell (21). An average first quality factor G1, which corresponds to an average value of the first quality factors G1i of the battery cells (21), is also determined.

Abstract: Disclosed are an electrochemical energy store and a method for connecting cells of an electrochemical energy store. According to the invention, the following steps are carried out: determination of a first set-point for an output voltage of the energy store; determination of a first probability (Pon) for connecting a first cell, the first probability (Pon) pre-determining the connection of the first cell to the electrochemical energy store; definition of a first condition limit value and a second condition limit value for all cells of the electrochemical energy store; calculation of a first condition value for the first cell, and independently of the first probability (Pon), non-connection of the first cell to the electrochemical energy store at a first time, if the condition value lies below the first condition limit value.

Abstract: The invention relates to an electrochemical energy accumulator and to a method for switching cells of an electrochemical energy accumulator. According to the invention, the following steps are carried out: a first desired value of an output voltage of the energy accumulator is determined, a first probability for switching a first cell is determined, said first probability predefining connection and/or disconnection of the first cell to or from the electromechanical energy accumulator, a first common state of charge threshold value being defined for all cells of the electrochemical energy accumulator in accordance with the first desired value, and the first cell is disconnected independently from the first probability value as long as the charge state lies below the charge state threshold value.

Abstract: The invention relates to a method and to a device for measuring a battery cell current through a battery cell unit. After the battery cell unit has been switched off, inductively stored energy from the battery cell unit is discharged (S1) by means of a discharging unit, wherein the inductively stored energy from the battery cell unit is energy stored by means of an inductive behavior of the battery cell unit, a time period in which the inductively stored energy from the battery cell unit has fallen to a predefined threshold value is determined (S2), and a battery cell current is determined (S3) on the basis of the time period determined.

Abstract: A method for the switching of a number of battery cells in a battery which is configured as an electrochemical storage device, wherein each of the battery cells is electrically connected to the battery in accordance with a corresponding first probability P1i, and is electrically disconnected from the battery in accordance with a corresponding second probability P2i, and wherein the battery cells are mutually connectable in series. According to the method, a performance factor Gi is calculated for each battery cell as a sum of a function, which, specifically, is linearly dependent upon a state of charge LZi of the corresponding battery cell, and a second function which, specifically, is linearly dependent upon a product of a current value of a current which flows in the corresponding battery cell when the corresponding battery cell is electrically connected to the battery and the internal resistance of the corresponding battery cell.