Abstract: A multi-voltage storage system for an at least partly electrically driven vehicle includes a first storage module and a second storage module having an identical rated voltage for storing electrical energy, wherein on-board consumers are connected to the second storage module at least with priority during a charging process, a heating apparatus for heating the storage modules, a switch unit which is designed to connect the first storage module and the second storage module in series for a charging process and in parallel for driving the vehicle, and a control unit, which is firstly designed to control the switch unit before and/or during a charging process such that the parallel connection of the first storage module and the second storage module is eliminated, and which is secondly designed, after elimination of the parallel connection, to activate the heating apparatus before and/or during the charging process.

Abstract: A cell for the electrochemical storage of electrical energy includes: a first sub-cell and a second sub-cell, which are each designed for the electrochemical storage of electrical energy; and a first electrolyte-stable insulation body for thermally insulating the first sub-cell and the second sub-cell from each other. The insulation body is arranged in an interstice between the first and second sub-cells, which is delimited by a side face of the first sub-cell and a side face of the second sub-cell, wherein the first insulation body has a first thermally insulating material having a thermal conductivity of at most 1 W/(m K) and a first heating structure designed to heat the first sub-cell and the second sub-cell, and wherein the first insulation body is electrically insulated from both the first sub-cell and the second sub-cell. A battery with such a cell and a vehicle with such a battery are also disclosed.

Abstract: A method is provided for impedance-controlled fast charging of a stored electrical energy source of a working device, in particular of a stored energy source in a vehicle. In the method: a variable characteristic of an impedance of the stored energy source is detected; a present charging current for charging the stored electrical energy source is set as a function of the variable characteristic of the impedance; the present charging current is temporarily reduced with a steep edge by temporarily connecting a resistive load to the stored energy source and feeding the load using the stored energy source; and a voltage response of the stored energy source to the steep edge is detected as the variable characteristic of the impedance of the stored energy source and is used as the basis for setting the present charging current.

Abstract: An electrical energy storage unit for a motor vehicle, having at least one storage unit cell designed to store electrical energy, which storage unit cell has a cell housing in which an electrolyte and an electrode device are arranged, and having a temperature control device that has at least one temperature control channel arranged outside the cell housing, which temperature control channel is able to be flowed through by a temperature control fluid in order to control the temperature of the storage unit cell. At least one heating device is able to be supplied with the electrical energy stored in the storage unit cell and thereby able to be electrically operated. By way of the heating device, the storage unit cell is able to be heated, wherein the heating device is able to be operated without any damage only when the storage unit cell has a state of charge that is not more than 60% of the maximum state of charge of the storage unit cell.

Abstract: A method for fast charging from an initial charge state SOC0 to a predefined target charge state SOCtarget is provided. Optimized fast charging conditions are determined using impedance measurements or impedance spectroscopy (EIS) of a battery system which includes a plurality of lithium ion cells. Units consisting of individual cells or of blocks of cells connected in parallel are connected in series, and devices for measuring the voltage and at least one component of the impedance of these cell units are also provided.

Abstract: A multi-voltage storage system for an at least partly electrically driven vehicle includes a first storage module and a second storage module having an identical rated voltage for storing electrical energy, wherein on-board consumers are connected to the second storage module at least with priority during a charging process, a heating apparatus for heating the storage modules, a switch unit which is designed to connect the first storage module and the second storage module in series for a charging process and in parallel for driving the vehicle, and a control unit, which is firstly designed to control the switch unit before and/or during a charging process such that the parallel connection of the first storage module and the second storage module is eliminated, and which is secondly designed, after elimination of the parallel connection, to activate the heating apparatus before and/or during the charging process.

Abstract: A storage cell for an energy store includes a cell housing in which storage means for storing electric energy are received, at least one connection which is arranged outside of the cell housing and via which the electric energy stored by the storage means can be provided, and at least one electric heating element arranged within the cell housing for heating the storage cell. The cell housing has a connection region, in which the heating element within the cell housing is electrically connected to the cell housing. At least one connection device is provided, having at least one connection element that has a first connection part, which is electrically connected to the cell housing outside of the cell housing and is made of a first material, and a second connection part, which is electrically connected to the first connection part and is made of a second material that differs from the first material.

Abstract: A heating device for a prismatic battery cell of a high-voltage battery of a motor vehicle includes two sheet-shaped heating elements to be arranged on two opposite lateral outer sides of a cell housing of the battery cell, and two connecting elements to be arranged on a housing cover of the cell housing. The connecting elements are electrically connected to terminals of the two heating elements. The connecting elements are flexibly formed, at least in certain regions, and as a result the heating elements are connected in a hinge-like manner. The heating device can be arranged by arranging the first heating element on the first lateral outer side of the cell housing, swinging the second heating element over the housing cover, and arranging the second heating element on the second lateral outer side on the cell housing.

Abstract: An electrical energy storage unit for a motor vehicle, having at least one storage unit cell designed to store electrical energy, which storage unit cell has a cell housing in which an electrolyte and an electrode device are arranged, and having a temperature control device that has at least one temperature control channel arranged outside the cell housing, which temperature control channel is able to be flowed through by a temperature control fluid in order to control the temperature of the storage unit cell. At least one heating device is able to be supplied with the electrical energy stored in the storage unit cell and thereby able to be electrically operated. By way of the heating device, the storage unit cell is able to be heated, wherein the heating device is able to be operated without any damage only when the storage unit cell has a state of charge that is not more than 60% of the maximum state of charge of the storage unit cell.

Abstract: A method is provided for impedance-controlled fast charging of a stored electrical energy source of a working device, in particular of a stored energy source in a vehicle. In the method: a variable characteristic of an impedance of the stored energy source is detected; a present charging current for charging the stored electrical energy source is set as a function of the variable characteristic of the impedance; the present charging current is temporarily reduced with a steep edge by temporarily connecting a resistive load to the stored energy source and feeding the load using the stored energy source; and a voltage response of the stored energy source to the steep edge is detected as the variable characteristic of the impedance of the stored energy source and is used as the basis for setting the present charging current.

Abstract: A storage cell for an energy store includes a cell housing in which storage means for storing electric energy are received, at least one connection which is arranged outside of the cell housing and via which the electric energy stored by the storage means can be provided, and at least one electric heating element arranged within the cell housing for heating the storage cell. The cell housing has a connection region, in which the heating element within the cell housing is electrically connected to the cell housing. At least one connection device is provided, having at least one connection element that has a first connection part, which is electrically connected to the cell housing outside of the cell housing and is made of a first material, and a second connection part, which is electrically connected to the first connection part and is made of a second material that differs from the first material.

Abstract: The invention relates to a method for operating a lithium ion battery (1) comprising at least one lithium ion cell and a heating device (2), wherein: the heating device (2) is designed to operate the lithium ion battery (1) in a temperature range between 5 and 90° C.; the lithium ion cell comprises an anode (4), a cathode (5), a separator (6), a current collector (7) and an electrolyte (3); the method comprises a step of operating the lithium ion battery (1) in a temperature range between 5 and 90° C.; and the electrolyte (3) contains: LiBOB as conducting salt and at least one selected from: PC and EC as solvent or LiFSI and/or LiDFOB as conducting salt and at least one glycol ether and/or DMC as solvent or LiFSI and/or LiTFSI and/or LiDFOB and/or LiTDI as conducting salt and at least one compound selected from: imidazolium compounds, pyrrolidinium compounds and piperidinium compounds as solvent.

Abstract: A safety switch device connects a heating unit for at least one battery cell of a high-voltage battery of a motor vehicle to a power supply connection that provides a heating current for the heating unit.

Abstract: The storage module for an energy store of a motor vehicle includes multiple storage cells. The multiple storage cells are wired together according to a circuit topology and are electrically connected together for storing electric energy. Each storage cell has at least one electric heating element for heating the each storage cell. The heating elements are electrically connected to one another according to the same circuit topology.

Abstract: A sintered electrode having a sintered composite material is provided. The composite material contains (A) active-material particles, (B) solid-state electrolyte particles from an inorganic lithium ion conductor, (C) a particulate conductivity additive from an electrically conductive material and (D) a fibrous material, with weight proportions N(A) to N(D) of components (A) to (D) in the composite material satisfy the following: N (A)>N (B)>N (C), N (D). A solid-state lithium-ion battery containing such sintered electrode is also provided.

Abstract: A heating device for a prismatic battery cell of a high-voltage battery of a motor vehicle includes two sheet-shaped heating elements to be arranged on two opposite lateral outer sides of a cell housing of the battery cell, and two connecting elements to be arranged on a housing cover of the cell housing. The connecting elements are electrically connected to terminals of the two heating elements. The connecting elements are flexibly formed, at least in certain regions, and as a result the heating elements are connected in a hinge-like manner. The heating device can be arranged by arranging the first heating element on the first lateral outer side of the cell housing, swinging the second heating element over the housing cover, and arranging the second heating element on the second lateral outer side on the cell housing.

Abstract: A safety switch device connects a heating unit for at least one battery cell of a high-voltage battery of a motor vehicle to a power supply connection that provides a heating current for the heating unit.

Abstract: A charging device for charging a motor vehicle includes an energy supply unit which is arranged externally in relation to the motor vehicle, and which is designed to provide electrical current for a solid-state gas battery of the motor vehicle. In addition, the charging device includes a gas supply unit which is arranged externally in relation to the motor vehicle and which is designed to provide gas for the solid-state gas battery of the motor vehicle. Furthermore, the charging device has at least one supply connection by which the energy supply unit can be coupled to the motor vehicle for the purposes of a charging process for supplying electrical current for the solid-state gas battery, and by which the gas supply unit can be coupled to the motor vehicle for the purposes of the charging process for supplying gas for the solid-state gas battery.

Abstract: A sintered electrode having a sintered composite material is provided. The composite material contains (A) active-material particles, (B) solid-state electrolyte particles from an inorganic lithium ion conductor, (C) a particulate conductivity additive from an electrically conductive material and (D) a fibrous material, with weight proportions N(A) to N(D) of components (A) to (D) in the composite material satisfy the following: N (A)>N (B)>N (C), N (D). A solid-state lithium-ion battery containing such sintered electrode is also provided.

Abstract: A method produces an electrochemical cell for a solid-state battery having a negative electrode, a positive electrode and a lithium-ion-conducting solid electrolyte arranged between the negative electrode and the positive electrode. The negative electrode has a layer of metallic lithium which directly adjoins the solid electrolyte. In order to produce the electrochemical cell, the layer of metallic lithium is heated until it softens before being joined together with the solid electrolyte. An electrochemical cell includes the negative electrode with a layer of metallic lithium which directly adjoins the solid electrolyte, and a layer of a lithium-metal alloy on the layer of metallic lithium.