Pressure relief device for a battery case, battery case with the pressure relief device, battery and method for depressurizing a battery

摘要

The invention relates to a pressure relief device (1) for a battery housing (2) comprising a separating element (3) for separating an inner region (4) of the battery housing (2) from an outer region (5) of the battery housing (2), a holding element (6) for the Separating element (3) for mechanically fastening the separating element (3) to the battery housing (2), and a plate-shaped element (7), which in an installed state on the inner region (4) of the battery housing (2) facing side of the separating element (3) is arranged parallel to the separating element (3). The plate-shaped element (7) is a) mechanically coupled via a plastically or elastically deformable web (8) to the holding element (6) and has a rectilinear recess (9) which extends transversely to an axis A; or b) via a first (8) and a second (8 '), plastically or elastically deformable web mechanically coupled to the holding element (6) and has a rectilinear recess (9) whose longitudinal axis is aligned with a straight line B and which extends within a plate-shaped element (7) from a predefinable distance from the first web (8) up to a predeterminable distance from the second web (8 '). The invention also relates to a battery case (2) with the pressure relief device, a battery to the battery case (2) and a method for depressurizing a battery.