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.
Lead and acid battery vents

Lead-acid Battery Vents

Global leader in lead-acid battery vents

EV & Fuel Cell Vents

EV and Fuel Cell Vents

Protect battery packs and fuel cells

Separators & Isolators

Separators & Isolators

Isolate components within batteries and fuel cells

Lead-acid Battery Vents

Lead Acid Battery VentsGlobal 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.

 

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 downloadDatasheet: POREX Battery Vents

EV and Fuel Cell Vents

Protect battery packs and fuel cells

Protect your battery packs and fuel cells 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 while keeping dust and moisture out of the enclosure.

Specifically designed for battery packs and fuels cells, our vents:

  • Contain a robust PTFE sintered structure–The POREX Virtek™ sintered structure is more robust and will not damage easily like expanded PTFE materials. 
  • Do 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.

 

Related Resources:

pdf downloadDatasheet: POREX Virtek™ IP-Rated Protection Vents

video Demostration video: Hydrophobicity and handling properties: POREX Virtek™ PTFE vs. expanded PTFE

video Demonstration video: Durability Comparison: POREX Virtek™ PTFE vs. expanded PTFE

videoDemonstration video: Dangers of not venting a sealed enclosure

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

fuel cell vents details
Separators & Isolators detail

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.

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