SAFETY VALVE SYSTEM WITH A MEMBRANE

Abstract

The invention relates to a valve (20) for an electrochemical energy storage device, this device comprising a casing (30), this valve itself comprising: - a valve body (10); - a first diaphragm (100) capable of bursting at least for a pressure difference between the two sides of the diaphragm greater than a threshold (P1) and means (24) forming at least a first support for said first diaphragm (100); - means (8, 12) maintaining the valve in a closed state for a pressure difference between the two sides of the diaphragm less than (P2) and allowing the valve to open for a pressure between (P1) and (P2), P1 > P2. Figure for the abstract: Figure 2A