This is an automotive battery cover rubber vent plug. It is manufactured from HNBR. It presents a red rubber component (with customizable color and size). It consists of two integrated parts: the "vent plug main body" and the "matching fixing base". The main body features a structure of "top circular cap + middle annular boss + bottom hollow cylinder". It has symmetric groove textures on the surface of the circular cap. The matching base adopts a T-shaped semi-open structure. It fits precisely with the cylindrical part of the main body. Its hardness is 70±5°. It retains elasticity without compromising rigidity. It is suitable for the mounting positions of automotive battery covers.As a critical safety component for vehicle power systems, it complies with the rigorous standards of Automotive Seal and Precision automotive seal. It is fully compatible with the application requirements of Automotive Sealing Assemblie and Automotive Sealing Solution.
Product Features
1. Functions
1)Battery Ventilation and Explosion-Proof Balance:It serves as a core component of automotive battery covers. It balances the pressure of gases such as hydrogen and oxygen generated inside the battery through precise ventilation apertures. It prevents battery bulging or explosion due to excessive internal pressure. It blocks external moisture and dust from invading the battery interior. This performance is essential for maintaining the integrity of Automotive Connector Seals and sensitive power connections.
2)Battery Fluid Sealing & Leak Prevention:It tightly fits the mounting groove of the battery cover. It fills gaps to block the leakage of battery electrolyte. It prevents electrolyte corrosion of surrounding components. It ensures the safety and lifespan of the battery system.
3)Assembly Positioning and Buffering:The fitting structure of the matching T-shaped base and the main body can precisely fix the vent plug. It prevents displacement caused by vehicle driving vibration. The elasticity of HNBR can also buffer vibration impacts. It improves component durability.
2. Performance Characteristics
1)HNBR Material + 70±5° Hardness for Harsh Automotive Battery Conditions:HNBR boasts excellent oil resistance, aging resistance, and temperature resistance (able to withstand -40℃~150℃). It is capable of resisting high temperatures, oil contamination in automotive engine compartments, and battery electrolyte erosion. The 70±5° hardness setting not only ensures structural rigidity to prevent failure due to pressure deformation. It retains sufficient elasticity to achieve sealing and buffering. This durability aligns with the standards of High-Temperature Connector Seals and heavy-duty automotive accessories.
2)Combined Structure + Groove Texture Enhances Practicality:The combined design of the main body and base facilitates quick assembly and replacement. The groove texture on the top not only enhances grip friction during assembly. It assists in the uniform discharge of gas, improving ventilation efficiency.
3)Electrolyte Corrosion Resistance Ensures Battery Safety:HNBR possesses excellent tolerance to battery electrolytes (sulfuric acid solution). Long-term contact will not cause swelling, cracking, or performance degradation. It ensures the long-term reliability of the vent plug.
3. Application Scenarios
1)Automotive Lead-Acid Batteries:It is suitable for lead-acid batteries in passenger cars and commercial vehicles. It serves as a ventilation and sealing component for battery covers to ensure safe battery operation. It meets the requirements of Vehicle Connector Waterproof Parts in automotive power systems.
2)Industrial Energy Storage Batteries:It is applicable for lead-acid batteries in industrial vehicles such as forklifts and engineering vehicles. It addresses ventilation and sealing needs under high-load working conditions. It complies with the quality standards of IP67 Connector Seals in industrial environments.
3)Backup Power Batteries:It is used for lead-acid batteries in UPS power supplies and emergency lighting systems. It ensures pressure balance of batteries during long-term standing and high-frequency charging/discharging. It is a reliable choice for Automotive Sealing Solution in stationary power applications.
4. Pain Point Solutions
1)Solving Battery Bulging and Explosion-Proof Problems:Ordinary rubber vent plugs have poor temperature resistance. They have insufficient ventilation aperture precision. They easily lead to battery internal pressure imbalance, bulging, or even explosion. The HNBR material and precise aperture design of this product can stably balance pressure. It improves battery safety. It enhances the performance of Automotive Seal components in safety-critical systems.
2)Resolving Electrolyte Leakage and Corrosion Problems:Ordinary rubber has poor electrolyte resistance. It is prone to swelling failure leading to electrolyte leakage and corrosion of surrounding components. The corrosion resistance of HNBR can completely block electrolyte leakage. It reduces maintenance costs. It optimizes the reliability of Precision automotive seal parts.
3)Addressing Vibration Displacement and Assembly Deviation:Vent plugs without positioning structures are prone to displacement under vehicle driving vibration. It leads to sealing failure. The combined positioning structure enables precise fixation. It avoids assembly deviation and displacement risks. It improves the assembly efficiency of Automotive Sealing Assemblie.
4)Solving High-Temperature Aging and Insufficient Lifespan:Ordinary rubber is prone to aging and hardening under high temperatures in engine compartments. It shortens service life. The aging resistance of HNBR can withstand long-term high-temperature working conditions. It extends the replacement cycle of the vent plug. This meets the requirements of Vehicle Connector Waterproof Parts and IP67 Connector Seals for long-term reliability.
