Focus on PUW EPTFE Material Co., Ltd - Get to know the new information of the industry quickly!
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Focus on PUW EPTFE Material Co., Ltd - Get to know the new information of the industry quickly!
2025-12-10 16:35:09
A vent valve is a protective component designed to regulate air pressure inside sealed systems while preventing the ingress of water, dust, or contaminants. In modern industries—especially electric vehicles (EVs), energy storage systems, and battery-powered mobility devices—vent valves play an essential safety role. They protect internal components, improve system stability, and prevent catastrophic failures in harsh operating environments.
Among various designs, the IP67 Plastic Vent Valve, Waterproof Plastic Vent Valve, and Corrosion-Resistant Vent Valve are widely used in EV battery packs, e-bike battery systems, and new-energy vehicles. Advanced variants, such as the EV Battery Explosion-proof Vent Valve and Explosion-Proof Vent Valve, offer additional safety layers for high-energy battery modules.
A vent valve allows controlled airflow between the inside of a sealed enclosure and the external environment. Its functional goals include:
Changes in temperature or internal chemical reactions create pressure fluctuations inside battery packs. A vent valve equalizes this pressure to protect housing integrity.
High-quality IP67 Plastic Vent Valves use hydrophobic membranes to stop water, dust, and contaminants while maintaining breathability.
In EV battery systems, gases may accumulate during abnormal reactions. An Explosion-Proof Vent Valve or EV Battery Explosion-Proof Vent Valve releases internal pressure in a controlled manner to prevent deformation or explosion.
Electric vehicle battery packs operate under dynamic conditions: high current, extreme temperatures, vibration, and exposure to outdoor environments. Proper ventilation ensures:
Lithium batteries generate gas during overcharge, thermal runaway, or aging. A Plastic Vent Walve (Vent Valve) allows safe venting while protecting the pack from external hazards.
Moisture and dust infiltration accelerate corrosion and reduce insulation strength. A Corrosion-Resistant Vent Valve minimizes internal humidity and contamination.
Pressure changes caused by temperature swings (charging/discharging cycles) can deform battery housings without proper venting.
Explosion-proof venting is mandatory in many EV and mobility system standards.
Offers strong waterproofing and dustproofing for outdoor conditions.
Ideal for e-bikes, battery boxes, and scooters exposed to rain and water splashes.
Designed for environments with humidity, salt spray, or chemical exposure.
Enables controlled release of internal pressure to prevent casing rupture.
Lightweight and economical solution for consumer-grade battery devices.
Most plastic vent valves use a microporous breathable membrane that:
Allows air to pass
Blocks water (hydrophobic)
Filters dust and particles
When internal pressure exceeds safe limits:
The membrane expands
Excess gas escapes safely
The enclosure returns to normal pressure levels
Explosion-proof models include:
A rupture disk
Controlled venting pathways
Reinforced housing
These ensure gas is released directionally and safely during emergencies.
Vent valves are essential in:
Protection for:
Battery modules
BMS units
High-voltage junction boxes
Prevent internal condensation and extend service life.
Ensure safe long-term cycling under outdoor conditions.
Including e-motorcycles, mopeds, and delivery vehicles.
Improved safety performance
Reduced risk of thermal runaway
Protection against water and dust intrusion
Extended lifespan of battery systems
Lower maintenance cost
Enhanced reliability in harsh environments
A vent valve is a small but crucial component that significantly influences the safety, durability, and performance of battery-powered systems. Whether used as an IP67 Plastic Vent Valve, Waterproof Plastic Vent Valve, Corrosion-Resistant Vent Valve, or advanced EV Battery Explosion-Proof Vent Valve, proper venting ensures stable operation for electric vehicles and new-energy mobility products.
As the demand for safer and more reliable lithium battery systems grows, vent valves will continue to play a vital role in the evolution of the EV and e-mobility industries.
Telephone: 0769-22850556
Email: lvch@puw-eptfe.com
Address: No.20, Wanjiang Industrial Street, Wanjiang District, Dongguan City, Guangdong Province, China
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