The invention proceeds from a battery system (BS), in particular a lithium ion battery system, containing at least one battery apparatus (B), having at least one apparatus (V) for increasing safety when using a degassing apparatus (E), wherein the degassing apparatus (E) is suitable for the controlled degassing of battery apparatuses (B), and wherein the battery apparatus (B) and the apparatus (V) are surrounded by a housing, and the degassing apparatus (E) is inserted into a wall of a housing, and wherein the apparatus (V) generates a physical distance between the battery apparatus (B) and the degassing apparatus (E) in such a way that a space is kept free between the battery apparatus (B) and the degassing apparatus (E) for discharging substances, which emerge from the battery apparatus (B), to an area surrounding the battery system (BS).