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Fuzhou Fuqiang Precision Co., Ltd. Latest company case about EPDM: A Superior Sealing Solution for New Energy Vehicle Batteries

EPDM: A Superior Sealing Solution for New Energy Vehicle Batteries


Latest company case about EPDM: A Superior Sealing Solution for New Energy Vehicle Batteries

EPDM: A Superior Sealing Solution for New Energy Vehicle Batteries


As the demand for new energy vehicles continues to grow, the need for high-performance battery components becomes paramount. EPDM (Ethylene Propylene Diene Monomer) has emerged as an excellent choice for manufacturing battery seals due to its exceptional properties and reliability. In this article, we will explore the experimental data that highlights the advantages of using EPDM for producing battery seals for new energy vehicles.


1. Temperature Stability:

EPDM seals exhibit consistent performance over a wide temperature range. They can operate normally for five days at temperatures ranging from -40°C to +110°C, ensuring reliable sealing performance even in extreme temperature conditions. Additionally, EPDM seals can endure intermittent exposure to temperatures up to +125°C for five days without any adverse effects.


2. Excellent insulation performance

EPDM has excellent electrical insulation performance, which can effectively isolate the current between battery modules and prevent problems such as current leakage and short circuit. This is very important for the safety and reliability of the new energy vehicle battery system.


3. Vacuum Water Absorption:

EPDM seals exhibit a remarkable vacuum water absorption rate of approximately 3.3%. This characteristic ensures that the seals maintain their integrity even in high-humidity environments or when exposed to water, providing reliable protection against moisture ingress.


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4. Accelerated Aging:

To assess the durability of EPDM seals, accelerated aging tests were conducted at a temperature of 70°C (158°F) for a period of seven days. The dimensional changes observed during this test ranged from 2% to 5%, while the compression resistance varied between 3% and 30%. These results demonstrate the robustness of EPDM seals, even under harsh aging conditions.


5. Dimensional Stability:

EPDM seals exhibit exceptional dimensional stability, as indicated by the minimal dimensional changes observed after subjecting the seals to a temperature of 80°C for three hours. The dimensional variations ranged from 1% to 5%, highlighting the ability of EPDM seals to maintain their shape and performance under elevated temperature conditions.


6. Ultimate Elongation and Break Elongation:

EPDM seals offer impressive elongation capabilities, with ultimate elongation and break elongation values ranging from 136% to 150%. This high level of flexibility ensures that the seals can withstand deformation and elongation without compromising their sealing effectiveness.


7. Tensile Strength:

EPDM seals demonstrate excellent tensile strength, with values reaching 475 kPa / 67.9 psi. This robust strength ensures that the seals can withstand mechanical stress and maintain their sealing integrity in demanding battery applications.


8.Tear Resistance:

EPDM seals exhibit exceptional tear resistance, with a tear strength of 1.4 kN/m / 8.1 Lbf/in. This property enables the seals to withstand tearing forces and provides extended service life, ensuring long-lasting performance in battery sealing applications.


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9.Ozone Resistance:

EPDM seals undergo ozone resistance testing at 20% elongation, 40°C, and 200 pphm (parts per hundred million). The test results indicate that the seals surpass 336 hours of exposure without any signs of cracking or deterioration. This remarkable ozone resistance guarantees the reliability and longevity of EPDM seals in environments prone to ozone exposure.



EPDM is a recyclable material, aligning with the growing emphasis on sustainability and eco-friendly practices. EPDM seals offer the advantage of being a reusable material, contributing to reducing waste and promoting a circular economy.



EPDM seals have proven to be an ideal choice for battery sealing applications in new energy vehicles, providing reliable and long-lasting performance. With their exceptional properties such as vacuum water absorption, dimensional stability, flexibility, strength, tear resistance, ozone resistance, temperature stability, and recyclability, EPDM seals ensure the integrity of new energy vehicle batteries and contribute to their optimal functionality. Choose EPDM seals for your battery manufacturing needs and experience the benefits of a superior sealing solution.

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