Description

Battery Pack Seals

Electric Vehicle (EV) Battery Pack Seals: Ensuring Safety, Efficiency, and Longevity

Electric Vehicle (EV) battery packs are at the heart of modern electric mobility. The performance and safety of these battery systems depend significantly on the quality of the seals used to protect the internal components. EV battery pack seals play a crucial role in safeguarding the battery from environmental factors, ensuring consistent performance, and extending the lifespan of the pack. These seals must withstand harsh operating conditions such as moisture, temperature fluctuations, chemical exposure, and vibrations.

The Role of Battery Pack Seals in Electric Vehicles

Environmental Protection: EV battery packs are often exposed to extreme weather conditions and high levels of moisture. Battery pack seals are designed to provide an airtight seal, protecting the internal components from moisture, dust, and debris, which can compromise the performance and safety of the battery.
Thermal Management: Battery packs operate efficiently within a specific temperature range. EV battery seals are designed to minimize thermal loss and maintain consistent internal temperatures. Effective sealing helps ensure that cooling systems work efficiently, preventing overheating or underperformance.
Safety and Fire Resistance: In electric vehicles, safety is paramount. Battery pack seals are made from fire-resistant and non-combustible materials to prevent leaks that could lead to hazardous situations. High-quality rubber seals are essential for preventing the spread of fire in case of a malfunction or short circuit.
Vibration Dampening: EV battery packs undergo vibrations during driving, which can lead to wear and tear on seals. Rubber seals in the battery pack offer vibration absorption properties, ensuring that the seals remain intact and effective even under constant movement.
Electrical Insulation: EV battery packs contain sensitive electronic components that need to be protected from external electrical interference. Battery pack seals must also provide electrical insulation, preventing electrical shorts and ensuring the safe operation of the battery system.

Key Features of EV Battery Pack Seals

Waterproof and Dustproof: EV battery packs need robust seals that prevent the ingress of water and dust, which can damage the battery's internal cells and circuits. Seals made from materials like silicone, EPDM, and FKM provide excellent waterproof and dustproof properties.
High Temperature Resistance: Battery packs can experience a wide range of temperatures, from freezing cold to scorching heat, especially in regions with extreme weather conditions. Seals made from high-temperature resistant materials (like silicone or fluorosilicone) ensure the battery pack operates reliably without degradation.
Chemical and Oil Resistance: EV battery packs are often exposed to various chemicals, including battery fluids and oils used for cooling. Seals made from nitrile rubber (NBR) or FKM (Viton) offer superior resistance to oils, fuels, and other chemicals.
Customizable Designs: Battery packs come in various shapes and sizes, and so do their sealing requirements. Custom-designed seals ensure a perfect fit, providing optimal protection for each specific EV battery model. This customization allows for tailored sealing profiles and material choices to meet precise requirements.
Compression Set Resistance: Over time, seals can lose their ability to maintain a tight fit due to constant compression and temperature cycling. Compression set resistance is a critical feature of high-quality seals, ensuring that the seals remain functional throughout the battery’s life cycle.

Materials Used in EV Battery Pack Seals

Silicone Rubber: A versatile material with excellent temperature resistance and electrical insulating properties. Silicone seals can function at high temperatures, ranging from -55°C to +300°C, making them ideal for EV battery applications.
EPDM (Ethylene Propylene Diene Monomer): Known for its weather resistance, ozone resistance, and excellent sealing properties, EPDM is often used in outdoor applications, including automotive battery packs.
FKM (Fluoroelastomer/Viton): FKM provides exceptional chemical and heat resistance, making it an excellent choice for EV battery seals that must withstand high temperatures and exposure to oils or fuels.
Nitrile Rubber (NBR): Nitrile offers great resistance to oil, fuel, and grease, which are essential characteristics for EV battery packs used in environments where such substances may be present.

Benefits of High-Quality EV Battery Pack Seals

Enhanced Durability: Properly engineered seals extend the life of the battery pack by protecting internal components from external damage and minimizing the risk of internal leakage, corrosion, or contamination.
Improved Efficiency: By ensuring proper sealing, EV battery pack seals help maintain consistent internal temperatures and efficient thermal management. This contributes to optimal battery performance and energy efficiency.
Increased Safety: Seals prevent short circuits, chemical leakage, and fire hazards, offering peace of mind for both manufacturers and end users. High-quality seals ensure that the battery pack operates safely under all conditions.
Cost Savings: By reducing the likelihood of battery failure, maintenance needs, and environmental impact, high-quality seals offer long-term cost savings for EV manufacturers and users.

Why Choose Julong Rubber for Your EV Battery Pack Seals?

Julong Rubber specializes in producing high-performance rubber seals specifically designed for electric vehicle battery packs. Our seals are customizable to meet your unique requirements, offering protection against moisture, temperature extremes, and chemical exposure. With over X years of experience in the rubber sealing industry, we provide reliable, cost-effective, and high-quality sealing solutions that meet international standards.

Get in Touch with Us
If you're looking for custom EV battery pack seals that ensure safety, durability, and efficiency, contact us today at info@rubberandseal.com or visit our website at www.rubberandseal.com for more information.

Additional information

Battery Pack Seals	Material: EPDM For the tests mentioned in the technical requirements, the samples shall be directly taken from the parts for testing. If the part shape cannot be sampled, the same material as the part shall be used for testing. The sealing effect of the finished parts shall meet the requirements of IP67 wading test. 1. Dimensions and tolerances: The cross-sectional shape, dimensions and tolerances, and product length and tolerances shall meet the requirements of the design drawings. 2. The appearance quality of the sealing strip shall comply with the following regulations: 1) No defects that affect the performance and appearance of the product are allowed: such as impurities, bubbles, cracks, scratches, tears, glue shortages, broken skin, twisted deformation or flattened deformation, etc.; 2) The surface treatment (including surface coating treatment, lamination treatment and planting treatment, etc.) should be uniform in texture, clean on the surface, free of dirt, and no defects such as falling off, color spots, and bumps are allowed; 3) The break difference of the product joint part should meet the requirements of round paper, and the molding should be uniform and the surface should be smooth; the color and pattern should be set according to customer requirements, and no defects such as color shift and pollution should occur; 4) Before the sealing strip test, the test sample must be placed at least 24 hours in the standard atmosphere of 23℃ and 50% relative humidity specified in IS0291. 3. Hardness: Hardness value of the delivery state (23±2℃): 50±5ShoreA hardness change value after (100℃/96h completion, TS0188) is within 05Shore The hardness change value after A-range aging (100℃/5046 after light, IS0188) is 05Shore. The hardness in A-range is measured according to "IS07619-1". 4. Tensile strength: tensile strength in delivery state (23+2℃):>9MPa after heat aging (100℃/96h after completion. IS0188):>9MPa after heat aging (100℃/504h after completion, 1S0188):>9WP tensile strength is measured according to "IS037 Determination of tensile stress-strain characteristics of chemical rubber or thermoplastic rubber". 5. Elongation at break As-supplied state (2+2℃) Elongation at break: >250% After heat aging (100℃/96h, IS0188): >250% Elongation at break after heat aging (100℃/96h, IS0188): >250% Elongation at break is determined according to "IS037 Determination of tensile stress-strain properties of rubber or thermoplastic rubber" 6. Crack strength As-supplied state (23+2℃) Fracture strength: >10KN/m Fracture strength is determined according to "IS034-1". 7. Compression permanent deformation According to CSMTCS400239 Test method B of "Test method for compression permanent deformation of elastomer parts", the sample uses the standard recommended size, compressed by 50%, heated at 100℃ for 22 hours, and the compression permanent deformation is less than or equal to 65% of the test compression. 8: Low temperature performance According to Chapter 4.4 of "SMTCS320040", the sample is directly bent 180 degrees after being stored at -40℃ for 22 hours, and there is no crack on the surface. 9. Ozone aging resistance According to the provisions of the machine "SMTC3261004 Ozone resistance test specification for elastomer materials", at an oxygen concentration of 2p, a test temperature of 23+2℃, and a relative air humidity of 60%, there is no crack after debugging for 46 hours 10. Brittle temperature: brittle temperature <-40℃ 11. Density <1.3g/cm3 12. Maximum fire rating of FWVSS302 10013

Battery Pack Seals

Material: EPDM
For the tests mentioned in the technical requirements, the samples shall be directly taken from the parts for testing. If the part shape cannot be sampled, the same material as the part shall be used for testing. The sealing effect of the finished parts shall meet the requirements of IP67 wading test.
1. Dimensions and tolerances: The cross-sectional shape, dimensions and tolerances, and product length and tolerances shall meet the requirements of the design drawings.
2. The appearance quality of the sealing strip shall comply with the following regulations:
1) No defects that affect the performance and appearance of the product are allowed: such as impurities, bubbles, cracks, scratches, tears, glue shortages, broken skin, twisted deformation or flattened deformation, etc.;
2) The surface treatment (including surface coating treatment, lamination treatment and planting treatment, etc.) should be uniform in texture, clean on the surface, free of dirt, and no defects such as falling off, color spots, and bumps are allowed;
3) The break difference of the product joint part should meet the requirements of round paper, and the molding should be uniform and the surface should be smooth; the color and pattern should be set according to customer requirements, and no defects such as color shift and pollution should occur;
4) Before the sealing strip test, the test sample must be placed at least 24 hours in the standard atmosphere of 23℃ and 50% relative humidity specified in IS0291.
3. Hardness: Hardness value of the delivery state (23±2℃): 50±5ShoreA hardness change value after (100℃/96h completion, TS0188) is within 05Shore The hardness change value after A-range aging (100℃/5046 after light, IS0188) is 05Shore. The hardness in A-range is measured according to "IS07619-1".
4. Tensile strength: tensile strength in delivery state (23+2℃):>9MPa after heat aging (100℃/96h after completion. IS0188):>9MPa after heat aging (100℃/504h after completion, 1S0188):>9WP tensile strength is measured according to "IS037 Determination of tensile stress-strain characteristics of chemical rubber or thermoplastic rubber".
5. Elongation at break As-supplied state (2+2℃) Elongation at break: >250% After heat aging (100℃/96h, IS0188): >250% Elongation at break after heat aging (100℃/96h, IS0188): >250% Elongation at break is determined according to "IS037 Determination of tensile stress-strain properties of rubber or thermoplastic rubber"
6. Crack strength As-supplied state (23+2℃) Fracture strength: >10KN/m Fracture strength is determined according to "IS034-1".
7. Compression permanent deformation
According to CSMTCS400239
Test method B of "Test method for compression permanent deformation of elastomer parts", the sample uses the standard recommended size, compressed by 50%, heated at 100℃ for 22 hours, and the compression permanent deformation is less than or equal to 65% of the test compression.
8: Low temperature performance
According to Chapter 4.4 of "SMTCS320040", the sample is directly bent 180 degrees after being stored at -40℃ for 22 hours, and there is no crack on the surface.
9. Ozone aging resistance
According to the provisions of the machine "SMTC3261004 Ozone resistance test specification for elastomer materials", at an oxygen concentration of 2p, a test temperature of 23+2℃, and a relative air humidity of 60%, there is no crack after debugging for 46 hours
10. Brittle temperature: brittle temperature <-40℃
11. Density <1.3g/cm3
12. Maximum fire rating of FWVSS302 10013