Batteries & Fuel Cell
Batteries & Fuel Cell
Battery and Fuel Cell
Battery & Fuel Cell
_______
Technology and know-how to make your product safer and more reliable.
Battery and Fuel Cell
Battery & Fuel Cell
_______
Technology and know-how to make your product safer and more reliable.

Better battery systems with Porex porous materials

Porex has been helping battery manufacturers improve their products for over 50 years.  From the humble flame arrestor used in every lead-acid battery, to critical safety relief vents used in modern electric vehicles, Porex has the technology and know-how to make your product safer and more reliable.

Our broad portfolio includes:

  • POREX Virtek® PTFE which is used in numerous safety venting and separation applications.
  • Porous polymer and fiber materials used as vents, separators, isolators, or electrolyte holding media.
EV and Fuel Cell Vents

EV Battery Safety Vents

Protect battery packs and fuel cells

Lead-acid Battery Vents

Lead-acid Battery Vents

Global leader in lead-acid battery vents

Separators & Isolators

Separators & Isolators

Isolate components within batteries and fuel cells

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Download our Tech Brief:
Learn how to ultrasonically weld PTFE protection vents

EV Battery Safety Vents

EV and Fuel Cell Vents

Protect your battery system with high performance POREX® protection vents. Designed with the robust POREX Virtek® PTFE sintered structure, our vents allow pressure equalization or in case of a failure, rapid release of gases for thermal runaway – all while keeping dust and moisture out of the enclosure.

Specifically designed for EV battery packs, our vents:

  • Allow dual-stage burst vent for passive pressure compensation and active last resort safety control, customizable in one material.
  • Contain a robust PTFE sintered structure – The POREX Virtek sintered structure is more robust and will not damage easily like expanded PTFE materials.
  • Protects any high-voltage battery system, resistant to extreme temperatures and weather conditions.
  • Does not change when handled – Airflow variations can occur when handling expanded PTFE, but not with POREX Virtek PTFE.
  • Assemble easily – Protection vents can be attached using ultrasonic, heat welding, overmolding and a variety of other attachment techniques.
  • Fully assembled vents – Porex can provide custom finished vents to your specifications.
  • Can be designed to act as a breather and safety vent.
  • 100% Free of PFOA: Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP

POREX Virtek® PTFE Membrane — Typical Properties

Item NumberIP Rating †WEP* Typical
mbar
Typical Airflow
l/hr/cm² @70mbar
Filtration Efficiency**
>99.99%
Thickness
mm
Max Operating
Temp °C
UL-94/746CSalt Fog$
PMV1064,672701070.5 µ0.13260°CV-0/f2No pen.
PMV10L***64,67270850.5 µ0.3100°CNo pen.
PMV1564,67370750.4 µ0.18260°CV-0/f2No pen.
‡PMV15T64,67370750.4 µ0.18260°CNo pen.
PMV2064,65,68520250.1 µ0.25260°CV-0/f2No pen.
PMV2565,67,68765170.2 µ0.1260°CV-0/f2No pen.
PMV2765,66,67,68105070.1 µ0.19260°CV-0/f2No pen.

† IEC std. 60529; IP 68 is a user defined and results must be verified by the user
*WEP = Water Entry Pressure
** According to IEST RP-CC007.2 2009
$ASTM B117-11 test method
***Laminated polyolefin mesh backing
‡ Oleophobic, AATCC TM 118 – Grade 8 – other membranes can also be treated to meet Grade 8 upon request
Properties are typical and not meant for specifications. Selected options and adhesives may effect properties
RoHS, WEEE, REACH Compliant (PFOA Free)

PRODUCT OFFERING BY MATERIAL SERIES – POREX Virtek® ADHESIVE DISCS

Dimenions (OD x ID in mm)

Material Series5 x 2 mm*7 x 3 mm10 x 6 mm12.7 x 7.1 mm20 x 13 mm
PMV10PMV10MPMV10NPMV10PPMV10WPMV10C
PMV10LPMV10LMPMV10LNPMV10LPPMV10LWPMV10LC
PMV15PMV15MPMV15NPMV15PPMV15WPMV15C
PMV20PMV20MPMV20NPMV20PPMV20WPMV20C
PMV27PMV27MPMV27NPMV27PPMV27WPMV27C
PMA10PMA10W#
*All products offered in 1,000 discs/roll excluding 5 x 2 mm series which is offered in 10,000 discs per roll
Special order items highlighted for higher MOQ. All others are stocked items
3M 93020LE adhesive standard (120 °C continuous use temperature
# Oleophobic treated and high temperature adhesive (good to 150 °C)
M, N, P, W & C are size codes as listed in column heading.
Many other standard and custom sizes available. Contact Porex for more information
Virtetek PTFE

Related Resources:

pdf Icon Datasheet: POREX Virtek IP-Rated Protection Vents

Video Icon Demonstration video: Demo of Porex Virtek PTFE Common Joining Techniques

Video Icon Demonstration video: Hydrophobicity and handling properties: POREX Virtek PTFE vs. expanded PTFE

Video Icon Demonstration video: Durability Comparison: POREX Virtek PTFE vs. expanded PTFE

Video Icon Demonstration video: Dangers of not venting a sealed enclosure

Video Icon Demonstration video: Keep electronics dry and protected with POREX Virtek PTFE vents

Video Icon Demonstration Video: Comparison  of PTFE  for use in a Breather / Rupture Disk Combination Device

Video Icon Demonstration video: Porex Virtek PFOA Free Membrane vs. Cast and Non-woven Membranes

pdf Icon PFOA Free Statement


Lead-acid Battery Vents

Lead-acid Battery Vents

Global leader in lead-acid battery vents

As the largest global supplier of battery vents, Porex offers a wide range of standard products and other options to support battery technology at facilities across the globe.

POREX® lead-acid battery vents are critical for batteries to function efficiently. Specifically designed to improve the safety of automobiles, our lead-acid battery vents:

  • Prevent sparks from entering the battery, reducing the chance of explosion.
  • Reduce the risk of acid spillage and aerosol emissions by providing controlled airflow, venting and optimized back pressure.
  • Allow easy assembly with heat welding or push-fit processing.
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Using Porous Plastics for Venting

Rectangular Vents Thickness Width Length
Item # Inches mm Inches mm Inches mm
XA-5019 0.106″ – 0.120″ 2.70 – 3.06 0.228″ – 0.244″ 5.80 – 6.20 0.935″ – 0.955″ 23.75 – 24.25
XA-5020 0.108″ – 0.120″ 2.75 – 3.06 0.228″ – 0.244 5.80 – 6.20 1.171″ – 1.191″ 29.75 – 30.25
XS-7499 0.122″ – 0.130″ 3.10 – 3.30 0.378″ – 0.394″ 9.60 – 10.00 0.612″ – 0.630″ 15.55 – 16.00
XA-5001-3 0.128″ – 0.148″ 3.25 – 3.75 0.535″ – 0.559″ 13.60 – 14.20 0.524″ – 0.547″ 13.30 – 13.90

 

Round Vents Diameter Thickness
Item # Inches mm Inches mm
XA-5008-1 0.229″ – 0.243″ 5.82 – 6.18 0.110″ – 0.126″ 2.80 – 3.20
XA-6404 0.384″ – 0.404″ 9.75 – 10.25 0.148″ – 0.167 3.75 – 4.25
XS-9017 0.390″ – 0.398″ 9.90 – 10.10 0.148″ – 0.167″ 3.75 – 4.25
XA-5027 0.390″ – 0.398″ 9.90 – 10.10 0.150″ – 0.165″ 3.80 – 4.20
XA-5666 0.394″ – 0.409″ 10.00 – 10.40 0.110″ – 0.130″ 2.79 – 3.31
A-5914 0.451″ – 0.465″ 11.45 – 11.81 0.147″ – 0.171″ 3.74 – 4.34
7682 0.451″ – 0.465″ 11.46 – 11.81 0.147″ – 0.171″ 3.73 – 4.34
XA-5029 0.461″ – 0.476″ 11.70 – 12.10 0.157″ – 0.181″ 4.00 – 4.60
41023 0.484″ – 0.503″ 12.29 – 12.78 0.142″ – 0.162″ 3.61 – 4.11
XA-5615 0.485″ – 0.502″ 12.32 – 12.74 0.142″ – 0.162″ 3.61 – 4.11
XA-5612 0.489″ – 0.503″ 12.42 – 12.78 0.120″ – 0.130″ 3.05 – 3.31
40003 0.489″ – 0.503″ 12.78 – 12.42 0.120″ – 0.130″ 3.05 – 3.30
XA-9402 0.492″ – 0.508″ 12.50 – 12.90 0.118″ – 0.142″ 3.00 – 3.60
41097 0.497″ – 0.508″ 12.62 – 12.90 0.110″ – 0.122″ 2.79 – 3.10
XA-5679 0.505″ – 0.519″ 12.82 – 13.18 0.120″ – 0.130″ 3.05 – 3.30
XS-8088 0.505″ – 0.519″ 12.82 – 13.18 0.120″ – 0.130″ 3.05 – 3.31
XA-5514 0.565″ – 0.585″ 14.35 – 14.85 0.112″ – 0.131″ 2.85 – 3.35
XS-56751 0.618″ – 0.634″ 15.70 – 16.10 0.140″ – 0.159″ 3.55 – 4.05
XA-5896 0.630″ – 0.644″ 15.98 – 16.38 0.140″ – 0.160″ 3.56 – 4.06
XA-5675 0.631″ – 0.644″ 16.04 – 16.36 0.140″ – 0.160″ 3.56 – 4.06
XA-5537 0.668″ – 0.682″ 16.97 – 17.33 0.114″ – 0.134″ 2.90 – 3.40
5441 0.745″ – 0.759″ 18.92 – 19.28 0.125″ – 0.137″ 3.18 – 3.48
XA-5812 0.748″ – 0.752″ 19.21 – 19.71 0.100″ – 0.135″ 2.55 – 3.43
XS-5793 0.781″ – 0.793″ 19.85 – 20.15 0.110″ – 0.126″ 2.80 – 3.20
XA-5024 0.784″ – 0.799″ 19.90 – 20.30 0.144″ – 0.171″ 3.65 – 4.35
XA-6022-1 0.839″ – 0.854″ 21.30 – 21.70 0.051″ – 0.067″ 1.30 – 1.70
XA-5009 0.880″ – 0.900″ 22.36 – 22.86 0.149″ – 0.173″ 3.79 – 4.39

Related Resources:

pdf Icon Datasheet: POREX Battery Vents

pdf icon Demonstration Video: Comparison of PTFE  for use in a Breather / Rupture Disk Combination Device

Video Icon Demonstration video: Porex Virtek PFOA Free Membrane vs. Cast and Non-woven Membranes


Separators & Isolators

Separators & Isolators

Isolate components within batteries and fuel cells

Components within batteries and fuel cells need separation to function properly.  That’s why our teams have developed custom-molded porous components – including sintered particles, PTFE membrane and porous fiber products – designed to isolate or separate components within these products.

Specifically designed to separate components in batteries and fuel cells, our materials:

  • Offer a wide variety of material and porous technologies– Assortment of materials including sintered particles, PTFE membrane, and porous fiber can be used in several types of batteries and fuel cells.
  • Free of PFOA: Compliant with (EC) 1907/2006 REACH / Regulation (EU) 2019/1021 POP

Materials Offered

  • Advanced porous materials (PE, PP)
  • PTFE membrane
  • Porous polymeric fiber

Formats Available

  • Film or sheet
  • 3D molded shapes
  • 2D fiber shapes
  • Customization options based on design requirements