EN
One of the most pressing issues of today's electronics and electric mobility is battery safety. With the increasing power and size reduction of devices, the amount of heat generated in the battery pack also increases, causing pressure, thermal runaway and even explosion problems. Managing these heat-related hazards requires more than just robust cell chemistry. It requires intelligent engineering solutions that will respond quickly when internal pressure levels get too high. PUW is a national high-tech company established in 2010 to address this challenge by developing new waterproof, breathable and explosion-proof valve technologies. PUW has two major production bases in Jiangxi and Guangdong covering approximately 40,000 square meters, four service centers in China and Germany, and 22 production lines. These resources enable PUW to provide customized, precision-engineered solutions that help battery packs meet strict global safety requirements.
The Science Behind Heat and Pressure Buildup
Every battery pack generates heat during charging and discharging. Under normal conditions, this heat dissipates gradually. But if a cell fails, short circuits or is overcharged, the temperature increases very quickly. This initiates a sequence of events leading to decomposition of the electrolyte and generation of gas causing an increase in internal pressure. If there is no release mechanism, the pressure may be too much for the enclosure, and it could burst open with the resulting fire and explosion. Thermal vent valve solutions are here to help solve that very situation. These valves help prevent catastrophic failure and allow nearby systems to safely shut down in the event of a gas or pressure leak. PUW's explosion proof valves are designed to open at a specific pressure to vent pressure without affecting the overall integrity of the enclosure.
Key Features That Enhance Battery Safety
PUW's thermal vent valve solutions are made to fit in a single, compact design element, designed with multiple protective features. The most prominent feature is the IP68 dust and water immersion rating, which ensures the valve remains completely sealed against dust and water under normal operating conditions. This is critical when it comes to battery packs for outdoor equipment, electric vehicles and portable electronics that are exposed to extreme conditions. If the pressure does increase, the valve will open immediately to vent the gas, and then close to keep the IP68 rating. This functionality is combined with precision engineering and advanced membranes. If the temperature changes, PUW's waterproof, breathable membrane can keep the air flowing continuously, which equalizes the pressure and lowers the stress on the seals, thus prolonging the battery life. The explosion proof valve acts as an additional safeguard by ensuring that there is a safe, one-way exit in case of an emergency.
Applications Across Industries
PUW's thermal vent valve solutions are not confined to any one sector. They are widely used in sensors, outdoor LED light fixtures and control boxes, outdoor electronic devices, battery packs, solar energy systems, home electronics, portable electronics, telecommunication devices, tools, disk drive filters, pharmaceuticals and automotive electronics. In every use, the issue one has to address is one of heat and pressure without compromising protection against water, dust and contaminants. In the battery pack of electric vehicles, the valves offered by PUW can contribute to ensuring safety and conform to high standards. At the same time, they are compact and lightweight, supporting the vehicle’s lightweight design. They act as a pressure relief mechanism in solar power generation systems to stop pressure from rising due to the heat and the sun's intensity. In portable electronics, they help ensure safe, reliable operation even during fast charging. The versatility has established PUW as a reliable partner for numerous world famous companies.
Innovation, Quality, and Global Support
PUW's commitment to innovation is backed by a dedicated R&D team, a CNAS certified laboratory, and more than 200 patents. The company's products comply with international quality management standards, including ISO 9001 and IATF 16949, as well as ISO 14001 environmental management standards. These certifications are based on a systematic quality, environmental and continuous improvement approach. With a flexible supply chain, smart inventory systems and a professional customer service team, PUW aims to ensure timely delivery and customer satisfaction. As a solutions provider with operations in China and Germany, PUW's strong infrastructure to meet clients' requirements for tailored solutions to thermal and pressure challenges. Through this emphasis on reliability, accuracy and creativity, PUW continues to be a leader in the explosion proof valve industry and aiding battery powered products in an ever-changing world.
