Abstract: Control method for a rechargeable battery that has an interface for communicating with a handheld power tool and for supplying power to the handheld power tool, wherein a machine characteristic value characterizing the handheld power tool is received via the interface of the rechargeable battery, the machine characteristic value representing at least one physical property of the handheld power tool, and the rechargeable battery being activated to deliver electrical energy to the handheld power tool if a logic circuit of the rechargeable battery determines that a system characteristic value, which is based on the machine characteristic value and on a rechargeable battery characteristic value representing a physical property of the rechargeable battery, exceeds or falls short of a predefined safety threshold.

Abstract: A method for determining the conductivity of an electrical conductor between a first system component and a second system component, the method steps determining a first voltage value and a second voltage value at the first or second system component for a given current intensity value; determining a first differential value between a reference voltage value at the first system component and the first voltage value; determining a second differential value between a reference voltage value at the first system component and the second voltage value; identifying a transition resistance as a quotient from the second differential value and the current intensity value when a difference between the first and second differential values reaches a predetermined threshold value; and adjusting the first and/or second system component from a first operating state into a second operating state and/or emitting at least one signal by means of a display device on the first and/or second system component when the transition re

Abstract: Method for communicating between a first participant with a first transceiver and a second participant with a second transceiver, having the method steps of transmitting a first signal from the first transceiver to the second transceiver, transmitting a second signal from the second transceiver to the first transceiver if, after determining a checksum, no error can be detected in a first component of the first signal; transmitting the first signal from the first transceiver to the second transceiver if no second signal has been received by the first transceiver after expiry of a first predetermined period of time; adjusting the first participant from a first operating state to a second operating state if no first signal is received after a second predetermined period of time or if no second signal is received after a third predetermined period of time; or transmitting a fourth signal from the first transceiver to the second transceiver in order to adjust the second participant from a first operating state to

Abstract: Method for communication between a power tool and a rechargeable battery, wherein the rechargeable battery includes a controller unit having a first transceiver, and the power tool includes a control unit having a second transceiver. The method involves the method steps of emitting a first signal from the first to the second transceiver; emitting a second signal from the first to the second transceiver after a predetermined period of time has elapsed; shifting the power tool from a first operating state into a second operating state if the number of received signals in a predetermined period of time reaches a predetermined threshold value, and/or emitting a signal to the first transceiver in order to shift the rechargeable battery from a first operating state into a second operating state if the number of received signals in a predetermined period of time reaches a predetermined threshold value. System for performing the method for communication, including a power tool and rechargeable battery.

Abstract: Charging an accumulator having an energy storage cell, a data interface and a wake-up circuit. A charging apparatus contains a data interface, a controller, a timer and a switch apparatus. The data interfaces connected to one another via a communication line for differential communication between the accumulator and charging apparatus. Setting the timer to a predetermined period of time; setting the control electronics of the accumulator to a deactivation mode; sending at least one signal from the charging apparatus to the accumulator via the communication line after the predetermined period of time has elapsed; activating the wake-up circuit for activating control electronics by detecting a voltage value from the communication line, the voltage value is consistent with either the dominant or recessive state of the communication line; setting the control electronics to an activation mode; and requesting or releasing a charging current from the charging apparatus using the accumulator.

Abstract: A method for the open-loop and closed-loop control of a power tool with at least one rechargeable battery, a drive and at least one control device, the rechargeable battery serving as an energy supply for the power tool. The method includes the method steps of: recording at least one temperature value of the rechargeable battery by a temperature measuring device; recording at least one first voltage value of the rechargeable battery by a voltage measuring device; and setting a first performance parameter value of the power tool to a second performance parameter value of the power tool for setting a current intensity value if the recorded temperature value corresponds to a predetermined temperature threshold value and the recorded voltage value corresponds to a predetermined voltage threshold value. A system including a power tool and at least one rechargeable battery for supplying the power tool with electrical energy for carrying out the method.

Abstract: A power tool with at least one control device and at least one communication circuit for exchanging signals in a half-duplex mode with a first and a second communication line for differential communication between at least a first transceiver and a second transceiver. A system including a power tool with at least one control device and a rechargeable battery with at least one set of control electronics, the rechargeable battery being designed for supplying the power tool with electrical energy. The system includes at least one communication circuit for exchanging signals in a half-duplex mode with a first and a second communication line for differential communication between at least a first transceiver and a second transceiver.

Abstract: A method for controlling a rechargeable battery on a machine tool contains the steps of: setting the control electronics of the rechargeable battery to a deactivation mode, with the result that no current flows from the rechargeable battery into the control electronics and to the machine tool; transmitting at least one signal from the machine tool to the rechargeable battery via the first and second communication lines; activating the wake-up circuit for activating control electronics by detecting a voltage value from the first or second communication line, wherein the voltage value corresponds to either the dominant or the recessive state of the first or second communication line; setting the control electronics of the rechargeable battery to an activation mode via the wake-up circuit; and enabling current to be drawn from the rechargeable battery by the machine tool.

Abstract: Rechargeable battery for a machine tool containing at least one energy storage cell and also one switching apparatus. The rechargeable battery contains a bypass circuit which can be operated in a first and second mode, wherein the bypass circuit is in an inoperative state in the first mode, so that an electric current with a first current value passes from the at least one energy storage cell to the machine tool via the switching apparatus, and wherein the bypass circuit is in an operating state in the second mode, so that an electric current with a second current value passes from the at least one energy storage cell to the machine tool via the bypass apparatus, and wherein the first current value is greater than the second current value.

Abstract: Method for charging an accumulator having an energy storage cell, a data interface and a wake-up circuit. A charging apparatus contains a data interface, a controller, a timer and a switch apparatus. The data interfaces are connected to one another via a communication line for differential communication between the accumulator and the charging apparatus.

Abstract: A method for controlling a rechargeable battery on a machine tool contains the steps of: setting the control electronics of the rechargeable battery to a deactivation mode, with the result that no current flows from the rechargeable battery into the control electronics and to the machine tool; transmitting at least one signal from the machine tool to the rechargeable battery via the first and second communication lines; activating the wake-up circuit for activating control electronics by detecting a voltage value from the first or second communication line, wherein the voltage value corresponds to either the dominant or the recessive state of the first or second communication line; setting the control electronics of the rechargeable battery to an activation mode via the wake-up circuit; and enabling current to be drawn from the rechargeable battery by the machine tool.

Abstract: A method for ascertaining a charge value for a system containing a power tool and a rechargeable battery used to supply the power tool with electrical energy. The method contains the method steps of detecting a first charge value of an electrical charge of the rechargeable battery at a first time instant; detecting a current value of an electric current flowing from the rechargeable battery to the power tool to supply the electrical load in the power tool, between a second time instant and third time instant (t2, t3); ascertaining a second charge value on the basis of the detected current value between a second time instant and third time instant; and subtracting the second charge value from the first charge value in order to ascertain a third charge value at the second time instant. Also provided is a rechargeable battery, power tool, and system containing a rechargeable battery and a power tool for performing the method.

Abstract: Rechargeable battery for a machine tool containing at least one energy storage cell and also one switching apparatus. The rechargeable battery contains a bypass circuit which can be operated in a first and second mode, wherein the bypass circuit is in an inoperative state in the first mode, so that an electric current with a first current value passes from the at least one energy storage cell to the machine tool via the switching apparatus, and wherein the bypass circuit is in an operating state in the second mode, so that an electric current with a second current value passes from the at least one energy storage cell to the machine tool via the bypass apparatus, and wherein the first current value is greater than the second current value.

Abstract: A method for determining a charge value for a system containing a charging apparatus and a rechargeable battery. The rechargeable battery can be connected to the charging apparatus to receive and store electrical energy. The method includes detecting a first charge value of an electrical charge of the rechargeable battery at a first time instant; detecting a current value of an electric current flowing from the charging apparatus to the rechargeable battery to charge the rechargeable battery, between a first time instant and second time instant; determining a second charge value on the basis of the detected current value between the first time instant and second time instant; and adding the second charge value from the first charge value in order to determine a third charge value in the rechargeable battery at the second time instant. A rechargeable battery, a charging apparatus, and a system containing a battery and a charging apparatus for performing the method are also provided.