Abstract: A rechargeable battery for a machine tool, having a cell core is provided, wherein no point within the cell core is at a distance of more than 5 mm away from a surface of the rechargeable battery and the rechargeable battery has a capacity of at least 2.2 Ah. A battery pack and a machine tool are also disclosed.

Abstract: A rechargeable battery pack having at least one pouch cell, wherein the rechargeable battery pack has at least one electrically conductive filament which surrounds the pouch cell at least in sections in such a way that expansion of the pouch cell causes severing of the filament.

Abstract: A system including a power tool and an energy supply device, wherein the energy supply device is provided for supplying the power tool with electrical energy. The energy supply device can be releasably connected to the power tool via an interface, wherein the interface includes at least a female contact partner and a male contact partner. The female contact partner and the male contact partner are in contact with each other in at least a first contact region and in a second contact region. The first contact region may be defined by a first contact normal force, while the second contact region may be defined by a second contact normal force, wherein the first contact normal force and the second contact normal force have different orientations. In addition, the interface can include an elastic means for reducing the relative movement between the male contact partner and the female contact partner. An interface for transmitting electrical energy, and to an energy supply device is also provided.

Abstract: An energy supply device is provided, in particular for a power tool, the energy supply device being detachably connectable to the power tool. The energy supply device includes at least one element for locking the energy supply device in the power tool, wherein the at least one locking element is mounted rotatably about at least one first axis of rotation, wherein the first axis of rotation runs through a pivot point of the at least one locking element. In this case, the pivot point of the locking element precedes a locking location in an insertion direction. The energy supply device has at least one element for actuation by a user, wherein the at least one actuating element is mounted rotatably about at least one second axis of rotation which runs through a pivot point of the actuating element. In this case, the pivot point of the at least one locking element can precede a locking location in an insertion direction. In a second aspect, the invention relates to a power tool having a energy supply device.

Abstract: An electric motor, in particular for a power tool, the electric motor having a stator with an inner opening for receiving a rotor. The inner opening has a diameter corresponding to an inner diameter of a stator, the stator having a series of pole teeth, which are each wound with a winding to form a coil. The winding is characterized by a reference diameter, a ratio of the reference diameter to the stator inner diameter multiplied by a number of pole teeth being greater than 0.3. Taking into account the internal resistance of an energy storage cell of an energy supply device of a maximum of 10 milliohms, the ratio of the diameters may be greater than 0.03 (milliohms)?1. Also provided is an electric motor, in particular for a power tool, a ratio being formed from a sum of total winding conductor cross sections and a free winding cross section, the ratio being multiplied by a number of pole teeth and the product being greater than 2.2.

Abstract: An energy supply device is provided, in particular for a power tool, the energy supply device being detachably connectable to the power tool. The energy supply device includes at least one element for locking the energy supply device in the power tool, wherein the at least one locking element is mounted rotatably about at least one first axis of rotation, wherein the first axis of rotation runs through a pivot point of the at least one locking element. The energy supply device includes at least one energy storage cell which has an internal resistance DCR_I of less than 10 milliohms (mOhm). In this case, the pivot point of the at least one locking element can precede a locking location in an insertion direction. A power tool having a energy supply device is also provided.

Abstract: A system including a machine tool and a power supply device, the power supply device being provided for supplying the machine tool with electrical power. The power supply device can be detachably connected to the machine tool by means of an interface, the interface coincluding at least one female contact partner and one male contact partner. The interface has at least one elastic means for reducing a relative movement between the male contact partner and the female contact partner, the at least one elastic device for reducing the relative movement between the contact partners being designed to engage with the at least one male contact partner and/or the at least one female contact partner. The power supply device includes at least one energy storage cell, the at least one energy storage cell having an internal resistance DCR_I of less than 10 milliohm. Methods for connecting a power supply device to a machine tool via an interface, and to an interface itself are also provided.

Abstract: A system that includes a power tool and an energy supply device, wherein the power tool can be detachably connected to the energy supply device via an interface, and wherein the energy supply device and the power tool are connection partners of the interface. One of the connection partners may have a locking element, whilst the respective other connection partner has a counterpart contour as a stop for the locking element, wherein the locking element and the counterpart contour have a base material with a first density. The locking element and the counterpart contour each have a contact region with contact materials, wherein at least one of the contact materials has a second density that may be higher than the first density of the base material. An energy supply device, wherein power tools and locking elements are also disclosed in the context of the invention.

Abstract: A system including a power tool and a first and a second energy supply device, wherein the energy supply devices can be detachably connected to the power tool via an interface. The first energy supply device has a number a of at least two contact partners for transmitting electrical energy to the power tool, whilst the second energy supply device has a number b of at least two contact partners for transmitting electrical energy to the power tool, wherein the number a of contact partners of the first energy supply device differs from the number b of contact partners of the second energy supply device. A system in which the contact partners of the energy supply devices have different coatings.

Abstract: An energy supply device, in particular for a power tool, wherein the energy supply device includes at least one cell and wherein at least one cell of the energy supply device has no pressure relief valve. Moreover, the at least one cell can have a flexible outer shell, at least in some section or sections or some region or regions. The at least one cell can have an outer surface or a volume, wherein a size of the outer surface or of the volume can be changed in accordance with cell parameters. In a second aspect, the invention relates to a power tool having a proposed energy supply device.

Abstract: A power tool having at least one control device, wherein the power tool can be detachably connected to an energy supply device, wherein there is provision for at least one communication connection for the exchange of signals between a first transceiver and a second transceiver by using serial digital communication, wherein the energy supply device comprises at least one energy storage cell and the at least one cell has a nominal capacity of at least 1.5 ampere hours, and also a surface A and a volume V, the surface A of the at least one cell being greater than eight times the cube root of the square of the volume V of the at least one cell. A system that includes such a power tool and an energy supply device is also provided.

Abstract: A system including a power tool and an energy supply device, wherein the energy supply device is provided for supplying the power tool with electrical energy. The energy supply device can be releasably connected to the power tool via an interface, wherein the interface comprises at least a female contact partner and a male contact partner. The interface has a total electrical transition resistance per pole of less than 0.4 milliohm, preferably less than 0.3 milliohm and particularly preferably less than 0.2 milliohm. At least one of the contact partners has a first coating, wherein the first coating has a graphite proportion of less than 30%. In addition, the interface may comprise more than six, preferably more than eight and most preferably more than twelve individual contact points. An energy supply device for use in the system is also provided.

Abstract: A power tool, wherein the power tool has at least one current conductor, wherein a circumference U of the at least one current conductor is greater than two and a half times the square root of the product of a cross-sectional area A of the at least one current conductor and pi ?. The at least one current conductor can include a series of individual current conductors, wherein the circumference U of the at least one current conductor corresponds to the enveloping circumference of the individual current conductors, and wherein the cross-sectional area A of the at least one current conductor can be formed from the sum of the cross-sectional areas of the individual current conductors. The power tool can be connected to an energy supply device in order to be supplied with electrical energy. An energy supply device for use in a power tool, i.e. for supplying a power tool with electrical energy.

Abstract: A method for manufacturing a rechargeable battery pack for an electric handheld power tool, wherein the rechargeable battery pack has a housing including a plurality of preferably cylindrical rechargeable battery cells, wherein the rechargeable battery cells are surrounded, at least in sections, by a thermally conductive potting material for the purpose of dissipating heat.

Abstract: A system including a power tool and an energy supply device, wherein the power tool can be detachably connected to the energy supply device via an interface. The interface has a base material with a first density and is designed in such a way that the interface allows a relative movement of the power tool and the energy supply device in an insertion direction and prevents a relative movement between the power tool and the energy supply device in the other spatial directions. The energy supply device has a first contact region with a first contact material and the power tool has a second contact region with a second contact material, wherein the first contact material and/or the second contact material have a second density, wherein the second density is greater than the first density of the base material of the interface. An energy supply device, and to a corresponding interface is also provided.

Abstract: Battery cell charging method for charging a lithium ion battery cell of a battery pack of an electric hand-held power tool, in which a charging current made available to the lithium ion battery cell is set on the basis of a cell state characterizing the lithium ion battery cell, wherein the cell state characterizing the lithium ion battery cell is a state of health and/or an internal resistance of the lithium ion battery cell.

Abstract: A method includes adjusting a rechargeable battery from a first state of charge to a second state of charge; creating a first current intensity value after a first predetermined time duration has elapsed, after a predetermined temperature value has been reached, after a predetermined current intensity value has been reached, or if the difference between a first and a second ascertained current intensity value reaches a predetermined threshold value; ascertaining a first voltage value after the first current intensity value has been reached; adjusting a second current intensity value after a second predetermined time duration has elapsed; ascertaining a second voltage value after the second current intensity value has been reached; and determining a first impedance value of the rechargeable battery from the quotient of the difference between the first and second current intensity values and the difference between the first and second voltage values. Rechargeable battery and charger for carrying out the method.

Abstract: Pouch cell having a positive contact lug and a negative contact lug, in which contact lugs electrical contact can be made with the pouch cell pouch cell and the pouch cell can be charged and discharged in this way, wherein the pouch cell is of planar design and has a flat cell surface which extends parallel in relation to the positive contact lug and the negative contact lug, wherein the positive contact lug has an upper positive connecting element and a lower positive connecting element, which positive connecting elements are arranged on opposite sides of the positive contact lug, and the negative contact lug has an upper negative connecting element and a lower negative connecting element, which negative connecting elements are arranged on opposite sides of the negative contact lug.

Abstract: Pouch cell having a positive contact lug and a negative contact lug, by means of which contact lugs electrical contact can be made with the pouch cell and the pouch cell can be charged and discharged in this way, wherein the pouch cell is of planar design and has a cell top side as well as a cell bottom side which is situated opposite the cell top side, wherein the positive contact lug has a conductive coating on the cell top side and an insulating coating on the cell bottom side and the negative contact lug has an insulating coating on the cell top side and a conductive coating on the cell bottom side, or vice versa, wherein the positive contact lug has an insulating coating on the cell top side and a conductive coating on the cell bottom side and the negative contact lug has a conductive coating on the cell top side and an insulating coating on the cell bottom side.

Abstract: A rechargeable battery pack which is designed to be detachably received in a receiving bay of an electric handheld power tool and/or a charging station, wherein the rechargeable battery pack has at least one rechargeable battery cell which is arranged within a housing of the rechargeable battery pack, wherein the rechargeable battery pack has a mechanical lock with a release position and a locked position, wherein the mechanical lock is designed to prevent the rechargeable battery pack from being received in the receiving bay in the locked position, and wherein the mechanical lock is tripped by an increase in volume of the rechargeable battery cell.