Abstract: A battery-based electrical system, includes: an interchangeable battery pack for storing electrical energy, and a battery-based electrical apparatus that is detachably electrically connectable to the interchangeable battery pack. The battery pack has a number of substantially cylindrical electrical battery cells, wherein at least one of the electrical battery cells has an electrical battery cell impedance, a value of the battery cell impedance when an electrical AC current at an AC frequency of 1 kHz is applied being less than 10 m?, in particular less than 5 m?, quite particularly less than or equal to 3 m?, when the electrical state of charge of the battery cell is 50% and when the temperature of the battery cell is 20° C. to 25° C. The battery-based electrical system has an electronic starting current limiting device for, in particular reversibly, limiting an electrical starting current flowing between the battery pack and the battery-based apparatus.

Abstract: A battery pack for detachable electrical connection to a battery-based device, wherein the battery pack has: at least one substantially cylindrical electric battery cell for storing electrical energy, and a current-limiting device, which is designed so as to be separate from the at least one battery cell and is electrically connected to the battery cell, for limiting an electric current flowing between the at least one battery cell and the battery-based device. The at least one battery cell has a cell interior and a differential pressure valve, wherein the differential pressure valve is designed to automatically connect the cell interior to an external environment of the battery cell so as to equalize pressure if a pressure difference prevailing between the cell interior and the external environment exceeds a predetermined limit value. The at least one battery cell itself has no current-interrupting device and/or no current-limiting device.

Abstract: A battery pack for a battery device has a battery cell pack, a connection device and an electrical busbar unit electrically connecting the battery cell pack to the connection device. The busbar unit has an electrically conductive core body and an electrically insulating stabilization body made of electrically insulating material. The core body has a first embedded portion, which is nearer the connection device, and a second embedded portion, which is remote from the first embedded portion. The core body has a fusible link portion of reduced cross section relative to the two embedded portions, which fusible link portion electrically and mechanically connects the two embedded portions to one another. The two embedded portions are each embedded in the electrically insulating material of the stabilization body.

Abstract: A battery pack supplies an electrically driven treatment apparatus with an electric driving power and includes a plurality of accumulator cells having cell contacts; at least one circuit board electrically connected to the cell contacts; and a battery pack housing having a first battery pack housing part and a second battery pack housing part. The first battery pack housing part and the second battery pack housing part are closed by each other. The accumulator cells are disposed within the battery pack housing. The cell contacts and the circuit board are disposed within the second battery pack housing part. The second battery pack housing part is configured as a mold for a casting compound, and the cell contacts and the at least one circuit board are enclosed by the casting compound.

Abstract: A method operates an electrically driven working device with at least one battery pack that is intended to supply the working device with electric drive power. The method includes the following steps: detecting a temperature of the battery pack, in particular of a battery cell of the battery pack, by way of a temperature sensor of the battery pack; determining a resistance variable of the battery pack on the basis of the detected temperature by way of the battery pack; and operating the working device on the basis of the determined resistance variable.

Abstract: A method operates an electrically driven working device with at least one battery pack that is intended to supply the working device with electric drive power, wherein the working device and the battery pack are electrically connected to one another in detachable fashion for power supply purposes. The working device is selected from a set of different working devices able to be electrically connected to the battery pack in detachable fashion, which working devices differ in terms of a respective power consumption variable, and/or the working device has different operating modes that differ in terms of a respective power consumption variable. At least one power consumption variable, in particular during operation of the working device with the battery pack, is at least temporarily higher than a continuous power output variable of the battery pack.

Abstract: A battery pack supplies an electrically driven treatment apparatus with an electric driving power, and includes: a stack limiting structure; a plurality of pouch cells, wherein the pouch cells are disposed in a stack, wherein the stack is disposed within the stack limiting structure; an outer temperature sensor, wherein the outer temperature sensor is disposed and configured for measuring an outer temperature of the stack outside the stack at an edge of the stack or the stack limiting structure, and/or outside the stack limiting structure; and a control device. The control device is configured for comparison of the measured outer temperature and/or a quantity based on the measured outer temperature to at least one temperature comparative value. The at least one temperature comparative value is a function of at least one of the pouch cells. The control device is configured for controlling the battery pack in response to a result of the comparison.

Abstract: A device for charging a battery pack includes a first battery compartment for a first battery pack and at least one second battery compartment for a further battery pack. The device is connected to a service voltage via a power supply unit. A voltage regulator is connected to the power supply and has a power output connected to the battery compartment. To charge battery packs with different performance data in a battery compartment, a first voltage regulator with a first power output for a first maximum charging current and at least one second voltage regulator having a second power output a second maximum charging current are provided. A switch arrangement is provided, which is designed to selectively connect the power output of a voltage regulator to only one battery compartment or the power outputs of at least two voltage regulators can be connected to just one battery compartment.

Abstract: A method is provided for type-dependent determination of a state of health or a state variable corresponding to a state of health, of a battery pack for supplying an electrically powered processing device with electric drive power. The battery pack and a charging device are mutually coupleable for the supply of the battery pack with the electric charging power. The charging device is from a set of different types of charging devices. The method recognizes a type of the coupled charging device, particularly by way of the battery pack, and determines the state of health or the state variable in dependence of the type thus recognized, particularly by way of the battery pack.

Abstract: A battery pack supplies an electrically driven treatment apparatus with an electric driving power and includes: a first stack limiting structure and a second stack limiting structure, wherein the second stack limiting structure is disposed opposite and with a fixed distance to the first stack limiting structure; a plurality of pouch cells, wherein the pouch cells are disposed in a stack, wherein the stack is disposed between the first stack limiting structure and the second stack limiting structure and a height of the stack in a stack direction is limited by the first stack limiting structure and the second stack limiting structure; and a sensor arrangement. The sensor arrangement is disposed in the stack. The sensor arrangement extends across a major part of a surface of the pouch cells and is configured such that the height of the stack across the extension is approximately equal. The sensor arrangement has a pressure sensor.

Abstract: A battery pack supplies an electrically driven treatment apparatus with an electric driving power. The battery pack includes: a plurality of pouch cells, wherein the pouch cells have cell tabs and are configured and disposed in a stack such that the cell tabs are disposed on a common tab side of the stack in two tab columns, wherein averted end limits of the tab columns define an intermediate zone, and a circuit board. The circuit board is disposed within the intermediate zone and is electrically connected to the cell tabs.

Abstract: A battery pack supplies an electrically driven treatment apparatus with an electric driving power and includes: a plurality of accumulator cells, wherein the accumulator cells have cell contacts; at least one circuit board, wherein the at least one circuit board is electrically connected to the cell contacts; and a battery pack housing, wherein the battery pack housing has a first battery pack housing part and a second battery pack housing part, wherein the first battery pack housing part and the second battery pack housing part are closed by each other. The accumulator cells are disposed within the battery pack housing.

Abstract: A battery pack supplies an electrically driven treatment apparatus with an electric driving power and includes: a first stack limiting structure and a second stack limiting structure, wherein the second stack limiting structure is disposed opposite and with a fixed distance to the first stack limiting structure; a plurality of pouch cells, wherein the pouch cells are disposed in a stack, wherein the stack is disposed between the first stack limiting structure and the second stack limiting structure and a height of the stack in a stack direction is limited by the first stack limiting structure and the second stack limiting structure; and a sensor arrangement. The sensor arrangement is disposed in the stack. The sensor arrangement extends across a major part of a surface of the pouch cells and is configured such that the height of the stack across the extension is approximately equal. The sensor arrangement has a pressure sensor.

Abstract: A battery pack supplies an electrically driven treatment apparatus with an electric driving power, and includes: a stack limiting structure; a plurality of pouch cells, wherein the pouch cells are disposed in a stack, wherein the stack is disposed within the stack limiting structure; an outer temperature sensor, wherein the outer temperature sensor is disposed and configured for measuring an outer temperature of the stack outside the stack at an edge of the stack or the stack limiting structure, and/or outside the stack limiting structure; and a control device. The control device is configured for comparison of the measured outer temperature and/or a quantity based on the measured outer temperature to at least one temperature comparative value. The at least one temperature comparative value is a function of at least one of the pouch cells. The control device is configured for controlling the battery pack in response to a result of the comparison.

Abstract: A battery pack supplies an electrically driven treatment apparatus with an electric driving power. The battery pack includes: a stack housing, wherein the stack housing has a common housing opening defined by a housing edge, and a plurality of pouch cells, wherein the pouch cells have cell tabs and are configured and disposed in a stack within the stack housing such that the cell tabs at least with tab parts on the common housing opening project beyond at least one edge portion of the housing edge. The tab parts are directly electrically connected to each other by welded connections.

Abstract: A battery cell (2) with a film cover (4) for electrochemically active material, wherein the film cover (4) is present substantially in a prismatic shape, and therefore the film cover (4) can be assigned two mutually opposite main surfaces (6a, b), and with current collectors (10a, b) which electrically contact the electrochemically active material and serve for the interconnection of the battery cell (2). At least one current collector (10a, b) has a flat element (12a, b) which substantially covers a main surface (6a, b) of the film cover (4) and has a connection region for connection to a cooling device, or is provided with cooling ducts.

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.

Abstract: The invention relates to a method for producing an electrode unit for a battery cell comprising the following steps: substance-to-substance bonding of contact lugs (35, 36) of a plurality of plate-shaped segments of a first electrode (21, 22) to a strip-shaped first separator layer (18), substance-to-substance bonding of a strip-shaped second separator layer (19) to the contact lugs (35, 36) of the segments of the first electrode (21, 22) or to the first separator layer (18) such that a strip-shaped composite element (50) is produced, wherein an active material (41, 42) of the segments of the first electrode (21, 22) is surrounded by the first separator layer (18) and by the second separator layer (19), and arranging a plurality of plate-shaped segments of a second electrode (21, 22) on the composite element (50). The invention further relates to an electrode unit for a battery cell, produced by the method according to the invention.

Abstract: A battery cell (2) with a film cover (4) for electrochemically active material, wherein the film cover (4) is present substantially in a prismatic shape, and therefore the film cover (4) can be assigned two mutually opposite main surfaces (6a, b), and with current collectors (10a, b) which electrically contact the electrochemically active material and serve for the interconnection of the battery cell (2). At least one current collector (10a, b) has a flat element (12a, b) which substantially covers a main surface (6a, b) of the film cover (4) and has a connection region for connection to a cooling device, or is provided with cooling ducts.