How to Solve Excessive Internal Pressure in Batteries? Choose PUW Explosion-Proof Pressure Relief Vent Valve

During battery operation, issues like short-circuiting or overcharging can generate excessive heat inside the battery, leading to a rapid buildup of internal pressure. This pressure increase can cause swelling or even explosions. Therefore, installing PUW explosion-proof pressure relief vent valves during battery production is essential to release excessive internal pressure and ensure the safety of the battery system.

PUW Battery Vent Valve: Dual Protection of Waterproof Venting and Explosion-Proof Safety

The PUW battery vent valve is a high-performance safety component that combines waterproof venting with explosion-proof capability, offering greater reliability and stronger performance compared to traditional safety valves. When internal battery pressure rises, this valve quickly releases excess gas to balance the internal and external pressure, all while preventing water ingress and maintaining the battery's internal dryness.

In extreme scenarios such as short-circuit, overcharge, or thermal runaway, the PUW vent valve responds rapidly to release pressure and prevent battery pack explosions.

Technical Specifications

• Pre-burst Airflow Rate: ≥600 ml/min @ 1.5 kPa (normal operating condition)

• Post-burst Airflow Rate: ≥1000 L/min @ 10 kPa (after reaching explosion-proof pressure)

• Explosion-Proof Opening Pressure (Customizable): 3 ± 1 kPa

• Low-pressure burst: 3–5 kPa

• Medium-pressure burst: 10–20 kPa

• High-pressure burst: 30 kPa and above

• Operating Temperature Range: -40°C to 150°C

• Model Number: PBA4K-50

• Flame Retardant Rating: UL 94-V0

• Ingress Protection: IP68 (1 meter water immersion for 48 hours), IP6K9K

Product Functions and Key Advantages

• Maintains dynamic pressure balance within the battery pack

• Offers waterproof, dustproof, and explosion-proof protection

• Rapid pressure release during overpressure situations, reducing explosion risk

• Customizable burst pressure ranges to meet diverse application needs

• Complies with automotive-grade durability standards, offering excellent weather resistance, long service life, and high reliability

PUW: A Trusted Supplier for Battery Protection Solutions

Since entering the automotive sector in 2013, PUW has been dedicated to the R&D, production, and sales of protective components for automotive electronics, especially in New Energy Vehicle (NEV) “Three Electric” systems—battery, motor, and controller.

In 2014, PUW officially launched the development of battery Explosion-proof Vent valves and quickly became one of the leading providers in China’s battery protection industry. PUW has since partnered with well-known NEV brands such as SAIC Motor, Geely, BYD, Dongfeng EV, Wanxiang, BAK, CATL, and BAIC, providing high-quality products and technical support.

For more information, customization inquiries, or sample requests, feel free to contact us. PUW is committed to delivering safer and more stable battery system protection solutions for the global new energy industry.