Battery Pack Pressure Vent Mesh in 304 Stainless Steel (AISI 304 (1.4301)) is used for equalizing internal pressure in sealed battery enclosures and acting as a flame and spark screen at the vent if a cell goes into thermal runaway. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
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| Magnetic response | Essentially non-magnetic (annealed) |
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| Service temperature | approx. +450 °C continuous |
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| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
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Specifications of Battery Pack Pressure Vent Mesh Available in 304 Stainless Steel
| Part | Length (mm) | Width (mm) | Thickness (mm) | Hole diameter (mm) | Open area (%) | Function |
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| Vent u00d88 | 8 | 8 | 0.10 | 0.10 | 30 | Pressure equalizing |
| Vent u00d812 | 12 | 12 | 0.15 | 0.15 | 30 | Pressure equalizing |
| Rect 20 u00d7 6 | 20 | 6 | 0.20 | 0.20 | 32 | Thermal-event flame screen |
Where 304 Stainless Steel Battery Pack Pressure Vent Mesh Is Used
- Electric vehicles: pack vent covers together with membrane vents.
- E-bikes & e-scooters: battery box vents exposed to rain and road spray.
- Power tools & garden equipment: pack vents.
- Energy storage systems: cabinet and module vents.
Ordering Battery Pack Pressure Vent Mesh in 304 Stainless Steel
- Hole size: 0.10–0.20 mm etched holes quench sparks while venting gas.
- Membrane stack: Pair the mesh with an ePTFE membrane for IP67 and pressure equalization.
- Adhesive: High-temperature acrylic or silicone adhesive that stays bonded during venting.
Mistakes to Avoid with Battery Pack Pressure Vent Mesh
- Using a low-temperature adhesive that lets go during a thermal event.
- Omitting the metal screen, leaving the membrane alone to face flame.
