DIAvent® maxFlow For High-Performance Batteries

As energy densities in modern vehicle batteries continue to rise, so do the gas volumes that require quick and controlled venting from the battery housing in the event of thermal runaway in individual cells. Existing solutions increasingly reach their limits: While overpressure causes conventional burst disks to open, it is not possible to close them again afterward. In addition, there is no way to precisely adjust the opening pressure of a burst disk, nor is it possible to perform nondestructive testing after the production or installation on the battery.

Metal spring instead of rubber umbrella

Performance data and technical specifications

The emergency degassing rate of the DIAvent® maxFlow is more than 190 liters per second at a differential pressure of 300 mbar – this is an increase by a factor of 2.5 compared with the DIAvent® HighFlow. The activation pressure can be freely adjusted between 50 and 200 mbar, with low tolerance. Even with these performance values, the installation height is very low at just 12.1 millimeters and the overall dimensions are a compact 86 × 86 × 12 millimeters. Each valve meets comprehensive protection classes (up to IPX9K and IP6KX), is certified according to UL94 V0, and is 100 percent inspected before delivery. A universal M6 bolt can be used for fastening; other options include clip or bayonet solutions. An integrated PIP seal compensates for unevenness of up to 0.2 millimeters in the housing.