In today's era of rapid development in the electric vehicle industry, rubber components, as the invisible guardians of core parts, are undergoing unprecedented technological innovation. By accurately grasping industry trends, Pexxon Rubber has advanced research and development on rubber materials for electric vehicles, achieving innovations in both materials and processes. This content explores the technological upgrading of rubber components for electric vehicles.
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Systematic upgrading of power battery sealing components
New energy vehicle battery packs have much higher requirements for sealing performance than traditional fuel vehicles. The liquid silicone rubber (LSR) sealing ring adopts nano-scale cross-linking technology, maintaining stable elasticity within a wide temperature range of -60℃ to 250℃, which is 40% higher than the temperature resistance range of traditional ethylene propylene diene monomer (EPDM). Its original fluorosilicone rubber formula has passed a 1,000-hour electrolyte immersion test with a swelling rate of < 1.2%, effectively preventing the risk of battery module leakage. In addition, the ceramizable silicone rubber coating can form a 1,000℃ high-temperature resistant ceramic layer during thermal runaway to block the spread of fire, and this technology has obtained UL 94 V-0 certification. -
Stability requirements for rubber components in electric drive systems
The high-frequency operation of the motor places extremely high demands on the dynamic stability of seals. They also need to withstand extreme weather and temperature conditions in different regions. For example, the hydrogenated nitrile butadiene rubber (HNBR) oil seal can achieve 100,000 reciprocating movements without leakage in a 150℃ oil-cooled environment, with a service life 3 times longer than that of traditional nitrile butadiene rubber. -
Upgraded charging safety of power batteries
With the continuous upgrading of battery technology, high-voltage fast charging technology is also becoming popular. Insulation is the key to charging safety, and it is directly related to seals. The innovative high dielectric strength silicone rubber in rubber technology has a volume resistivity of > 10¹⁴Ω・cm and arc ablation resistance of up to 10kV, providing double protection for liquid-cooled charging guns. Its charging pile sealing strip, used in outdoor environments ranging from -40℃ to 150℃, has a hardness change of < 5 Shore A after 10 years of ultraviolet radiation. It has passed TÜV Rheinland certification and is used in the ultra-fast charging network of State Grid. -
Sustainability trends of rubber component materials
Due to the impact of carbon footprint on traditional materials, it is foreseeable that bio-based rubber will become a sustainability trend. Bio-based rubber synthesized from sugarcane ethanol-derived butadiene has been put into mass production, with a carbon footprint 45% lower than that of traditional materials, and has obtained EU RED certification. The charging gun sealing ring made of this material has passed 10,000 insertion and extraction tests and has entered the supply chain of the Volkswagen ID. series. Its closed-loop recycling technology has increased the recycling rate of waste rubber to 40%, and the battery pack sealing strip made of recycled materials has passed a 1,000-hour salt spray test, with performance equivalent to that of new products. With the increasing demand for material strength, innovative synthetic rubber will replace traditional synthetic rubber in the future. -
Relationship between manufacturing, processes and environmental protection
In the production of complex-structured seals, 3D printing technology can save 30% of materials. At the same time, the introduction of an AI visual inspection system has increased the product yield to 99.5%. Pexxon Rubber's factory has obtained ISO 14064 certification, with photovoltaic power generation covering 30% of energy consumption, and the bio-based rubber production line achieving zero wastewater discharge.