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: Protective apparatus for protecting a rechargeable battery pack including at least one rechargeable battery cell against an overvoltage in at least one line of the rechargeable battery pack. Method for protecting a rechargeable battery pack against an overvoltage, wherein the rechargeable battery pack includes at least one rechargeable battery cell and also a protective apparatus including a fuse device including at least one fuse, a short-circuiting line for optionally short-circuiting the at least one rechargeable battery cell by way of the at least one fuse, a monitoring device including at least one voltage comparator and at least one switch for optionally closing the short-circuiting line.

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.