The invention relates to a device for removing water from a battery housing (100) or a battery separator, comprising a body (310) having a plurality of capillaries (3201-3207) and electrodes (330, 340) for producing an electric field, and a control device (350) for controlling the electric field for removing water through means of the capillaries (3201-3207), a battery housing, a battery separator, a battery system, a vehicle, a method, a computer program and a computer program product.