Abstract: The present invention relates to a system a system for accelerating the infiltration of a liquid electrolyte in a battery cell, the system comprising: means for positioning the battery cell; a transducer for generating a wave in response to an excitation signal, a controller for controlling the transducer; wherein the transducer and the battery cell are positioned such that the battery cell sits in the direction of propagation; wherein the transducer and the battery cell are positioned such that a distance from the transducer to a surface of the battery cell, furthest away from the transducer, is equal to or larger than one fourth of the wavelength; wherein the controller is configured to bring the voltage and the current of the excitation signal in phase with one another. The present invention also relates to a method or accelerating the infiltration of a liquid electrolyte in a battery cell.

Abstract: A filling head assembly for filling a battery cell with a liquid electrolyte includes a filling head. The filling head includes a first and a second fluid channel and a valve. The inlet of the first fluid channel is connected to a pump. The inlet of the second fluid channel is connected to a vacuum pump. The outlet of the first fluid channel engages with a filling opening of the battery cell. The valve determines whether the outlet of the first fluid channel is connected to the inlet of the first fluid channel. The apparatus includes the filling head, to a production line comprising the apparatus and to a method for filling a battery cell with liquid electrolyte using the apparatus.