Abstract: A work machine includes a working device for generating a working motion; an electric motor for driving the working device; an electric energy storage device for supplying the electric motor with electric current; and a cooling device for cooling the energy storage device. The cooling device comprises at least one fan device for generating a cooling air flow which can be directed over the energy storage device. At least one temperature sensor is provided for detecting a temperature, and a control device is provided for controlling the fan device as a function of the temperature detected by the temperature sensor.

Abstract: A work machine, such as a vibration tamper or a vibratory plate machine, includes a work device such as a ground contact plate, and a drive for driving the work device. The drive has an electric drive motor, an electric power accumulator for supplying the drive motor with an electric current, and an inverter installation for inverting the current from the power accumulator and for supplying the current to the drive motor. A cooling device is provided for cooling the power accumulator and the inverter installation. The cooling device has at least one fan installation for generating a cooling airflow which is able to be guided by way of the power accumulator and the inverter installation. The fan installation has a fan and a fan motor that drives the fan. The fan motor is provided separately from the drive motor of the drive.