Ventilation device for battery and battery comprising the same

Ventilation device for a battery, comprising:

• a housing configured for being attached to a battery casing in a sealing manner and comprising at least one lateral wall;
• a breathable filter extending across and closing a distal end of the at least one lateral wall and configured for separating an interior of the battery casing from a breathing chamber within the housing;
• a venting membrane configured for separating the breathing chamber from an exterior environment in a gas tight manner and configured to rupture in response to gas pressure inside the housing reaching a reference pressure or greater;
• and
• a breathing sprout opening directly into the breathing chamber to fluidly connect the breathing chamber and the exterior environment and bypassing the venting membrane,
• wherein the breathing chamber is defined by the at least one lateral wall, the breathable filter, and the venting membrane, and
• wherein in a venting event, the ruptured venting membrane provides a flow area for a vent gas stream that is at least two times larger than a flow area of the breathing sprout.