GORE® Automotive Vents for Batteries
GORE® Automotive Vents for Batteries are snap-fit ePTFE membrane PolyVent components designed to provide continuous pressure equalization and sustained environmental protection for electric vehicle (EV) battery packs and battery management systems (BMS). Available in three series — PolyVent Super High Airflow (AMF310070), PolyVent High Airflow (AMF300070), and PolyVent Compact (AMF300200) — the family provides typical airflow from approximately 28 l/h to approximately 430 l/h at 7 kPa, with minimum Water Entry Pressure (WEP) ratings from > 30 kPa to > 80 kPa depending on series. All three series use hydrophobic and oleophobic ePTFE membranes and are engineered for integration into plastic or metal battery enclosures.
The PolyVent Super High Airflow Series (AMF310070) delivers 3x the minimum airflow of the High Airflow Series (AMF300070) and is rated IP67 (1 m for 30 min); the High Airflow Series delivers 7x the minimum airflow of a standard electronics series and is rated IP68 (1 m for 1 h); the Compact Series (AMF300200) offers robust protection in a low-profile design for extremely small components and is rated IP68 (1 m for 1 h) with optional IPX6K and IPX9K ratings depending on housing geometry. All series include laser marking for traceability. The Compact Series additionally features a scannable Digital Matrix Code (DMC) for 100% airflow verification.
All three series have been tested for thermal shock, climate resistance, salt spray resistance, fluid resistance, vibration and mechanical shock resistance, temperature resistance, and ice-water-shock resistance (Super High Airflow and Compact Series only) per applicable automotive standards. Manufactured at an IATF 16949, ISO 9001, and ISO 14001-certified facility.
Key Properties
- Typical Airflow: ~430 l/h at 7 kPa (Super High Airflow) / ~160 l/h at 7 kPa (High Airflow) / ~28 l/h at 7 kPa (Compact)
- Minimum Water Entry Pressure (WEP): > 30 kPa / 3 sec (Super High Airflow) / > 30 kPa / 30 sec (High Airflow) / > 80 kPa / 60 sec (Compact)
- Ingress Protection: IP67 (1 m / 30 min) — Super High Airflow; IP68 (1 m / 1 h) — High Airflow and Compact
- Operating Temperature Range: -40 °C to +125 °C (Super High Airflow, High Airflow); -40 °C to +140 °C (Compact)
- Membrane Characteristic: Hydrophobic and oleophobic (all series)
- Housing Material: PBT-I-GF30 hydrostabilized (Super High Airflow, Compact); PBT-GF30 hydrostabilized (High Airflow)
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- Specifications
- Applications
- General Info
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Product Identification
| Property | PolyVent Super High Airflow | PolyVent High Airflow | PolyVent Compact | Test Method |
| Sample order number | SMPL-AMF310070-50 | AVS 70 | AVS 200 | — |
| Series production order number | AMF310070 | AMF300070 | AMF300200 | — |
Airflow & Protection Performance
| Property | PolyVent Super High Airflow (AMF310070) | PolyVent High Airflow (AMF300070) | PolyVent Compact (AMF300200) | Test Method |
| Minimum Water Entry Pressure (WEP) | > 30 kPa / 3 sec | > 30 kPa / 30 sec | > 80 kPa / 60 sec | Measured at standard ambient temperature and pressure |
| Minimum airflow | > 302 l/h at 7 kPa | > 105 l/h at 7 kPa | > 15 l/h at 7 kPa | By conversion to normalized state 0 °C, 1013 hPa |
| Maximum airflow | < 820 l/h at 7 kPa | < 260 l/h at 7 kPa | < 45 l/h at 7 kPa | By conversion to normalized state 0 °C, 1013 hPa |
| Typical airflow | ~430 l/h at 7 kPa | ~160 l/h at 7 kPa | ~28 l/h at 7 kPa | By conversion to normalized state 0 °C, 1013 hPa |
| Ingress Protection (IP) | IP67 (1 m for 30 min); depending on housing geometry: IPX6K | IP68 (1 m for 1 h); depending on housing geometry: IPX6K | IP68 (1 m for 1 h); depending on housing geometry: IPX6K, IPX9K | — |
Physical & Construction Properties
| Property | PolyVent Super High Airflow (AMF310070) | PolyVent High Airflow (AMF300070) | PolyVent Compact (AMF300200) | Test Method |
| Operating temperature (min) | -40 °C | -40 °C | -40 °C | — |
| Operating temperature (max) | +125 °C (+130 °C for max 810 hrs) | +125 °C | +140 °C | — |
| Membrane characteristic | Hydrophobic and oleophobic | Hydrophobic and oleophobic | Hydrophobic and oleophobic | — |
| Housing material | PBT-I-GF30 hydrostabilized | PBT-GF30 hydrostabilized | PBT-I-GF30 hydrostabilized | — |
| O-ring material | EPDM 40 IRHD-M | EPDM 45 IRHD-M | Silicone 50 Shore A | — |
| O-ring color | Black | Black | Red | — |
| Laser marking for traceability | Yes | Yes | Yes | — |
Environmental Performance
| Test | Method | Test Conditions |
| Thermal Shock Resistance | ISO 16750-4 | Cycling between Tmin and Tmax within 30 seconds; 30 minutes conditioning at each temperature; minimum 500 cycles |
| Climate Resistance | DIN-EN-60068-2-67 | 85 °C temperature, 85% relative humidity, 1,000 hours |
| Salt Spray Resistance | DIN EN 60068-2-11 | Profile Ka |
| Fluid Resistance | ISO 16750-5 | Performance depends on application method and specific contaminant applied |
| Vibration and Mechanical Shock Resistance | ISO 16750-3 | Performance depends on sinusoidal and temperature profile, pulse shape and duration, number of shocks and peak acceleration |
| Temperature Resistance | ISO 16750-4 | Tmax for 2,000 hours; Tmin for 168 hours |
| Ice-Water-Shock Resistance (not applicable to AMF300070) | ISO 16750-4 | Heating to Tmax for 60 minutes; rapid submersion in 5% NaCl ice water for 5 minutes; 20 cycles |
Compliance
- IATF 16949 — Certified manufacturing facility
- ISO 9001 — Certified manufacturing facility
- ISO 14001 — Certified manufacturing facility
- Pressure equalization venting in lithium-ion EV battery pack enclosures subject to temperature and altitude cycling
- Battery management system (BMS) housing protection against water, automotive fluids, salts, dirt, and mud
- Large-format battery pack venting requiring high airflow throughput in hybrid and full-electric vehicle platforms
- Compact battery module venting in space-constrained BMS enclosures requiring IP68 and IPX9K protection
- Snap-fit vent integration into plastic or metal battery enclosures without additional housing modifications
Common industries: Electric vehicle, hybrid vehicle, automotive electronics, battery systems.
GORE® Automotive Vents for Batteries reduce pressure differentials caused by temperature and altitude changes within EV battery enclosures by allowing continuous bidirectional airflow while blocking water, automotive fluids, salts, dirt, and mud. The ePTFE membrane at the core of each vent contains pores engineered to be 700x larger than an air molecule — ensuring reliable airflow — yet 20,000x smaller than a drop of water, blocking liquid ingress.
The ePTFE membrane is chemically inert, non-shedding, UV-resistant, temperature-resistant, and hydrophobic and oleophobic.
The three series address different battery system size and integration requirements. The Super High Airflow Series (AMF310070) is suited to large battery packs requiring rapid pressure equalization, with minimum airflow > 302 l/h and maximum < 820 l/h at 7 kPa, and an operating temperature ceiling of +125 °C (up to +130 °C for maximum 810 hours).
The High Airflow Series (AMF300070) covers mid-range airflow requirements with minimum > 105 l/h and maximum < 260 l/h at 7 kPa. The Compact Series (AMF300200) is designed for extremely small battery management components with minimum > 15 l/h and maximum < 45 l/h at 7 kPa and the highest temperature rating in the family at up to +140 °C continuous. All series use PBT-based hydrostabilized housing materials and EPDM or silicone o-rings.
Environmental durability testing covers thermal shock per ISO 16750-4, climate resistance per DIN-EN-60068-2-67 (85 °C, 85% RH, 1,000 hours), salt spray per DIN EN 60068-2-11 (Profile Ka), fluid resistance per ISO 16750-5, vibration and mechanical shock per ISO 16750-3, temperature resistance per ISO 16750-4 (Tmax for 2,000 hours; Tmin for 168 hours), and ice-water-shock per ISO 16750-4 (applicable to Super High Airflow and Compact Series). Compliant with IATF 16949, ISO 9001, and ISO 14001.
How do the three GORE® Automotive Vents for Batteries series differ from one another?
The three series are differentiated by airflow capacity and temperature rating. The Super High Airflow Series (AMF310070) delivers the highest airflow (~430 l/h typical at 7 kPa) for large battery packs needing rapid pressure equalization, rated IP67. The High Airflow Series (AMF300070) provides mid-range airflow (~160 l/h typical) with IP68 protection. The Compact Series (AMF300200) is designed for the smallest components with lower airflow (~28 l/h typical), IP68 protection, and the highest maximum operating temperature in the family (+140 °C), plus DMC scanning for 100% airflow verification.
Why is controlled airflow critical for EV battery venting applications?
EV battery enclosures experience internal pressure changes due to temperature cycling, charging/discharging heat generation, and altitude changes. Without continuous equalization, pressure differentials can stress seals and enclosure joints, increasing the risk of ingress failures or structural fatigue. The ePTFE membrane in each GORE® PolyVent allows bidirectional airflow to continuously equalize these pressures while its sub-micron pore structure blocks water, fluids, salts, and particulates that could damage battery cells or electronics.
What are the operating temperature ranges for GORE® Automotive Vents for Batteries?
All three series share a minimum operating temperature of -40 °C. Maximum operating temperature is +125 °C for the Super High Airflow and High Airflow Series (with the Super High Airflow Series rated to +130 °C for a maximum of 810 hours), and +140 °C continuous for the Compact Series.
Are GORE® Automotive Vents for Batteries suitable for automotive-grade regulated environments?
Yes. All three series are manufactured at a facility certified to IATF 16949, ISO 9001, and ISO 14001. Environmental performance has been validated per automotive standards including ISO 16750-4 (thermal shock, temperature resistance, ice-water-shock), DIN-EN-60068-2-67 (climate resistance), DIN EN 60068-2-11 (salt spray), ISO 16750-5 (fluid resistance), and ISO 16750-3 (vibration and mechanical shock).
How should GORE® Automotive Vents for Batteries be specified?
Specify series (Super High Airflow AMF310070, High Airflow AMF300070, or Compact AMF300200), required airflow range, minimum WEP requirement, required IP rating, operating temperature range, housing wall material and thickness, and installation method (snap-fit). Contact your Gore representative for detailed installation drawings and housing geometry requirements.
