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EPS shell material - waterproof material

EPS battery cell Envelope Protection Structure (EPS) not only needs to have good fire performance, but also must have effective waterproof function to ensure the safety and reliability of the battery in wet or liquid environment. The application of waterproof materials in the shell of the EPS battery cell is crucial to avoid the battery moisture resulting in performance degradation or safety hazards. The following is a detailed introduction to the EPS battery cell shell and its waterproof material.

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Polymer Materials

Polyvinyl chloride (PVC) : with good waterproof performance and resistance to various chemicals, it is widely used in cable protection and battery casings.

Polyethylene (PE) : low cost, excellent waterproof performance, can effectively isolate water.

Polyurethane (PU) : With good elasticity and waterproof ability, suitable for shell protection, and strong adaptability to temperature changes.

Fluoroplastics (such as PTFE) : have excellent chemical resistance and water resistance, and can maintain performance under extreme conditions.

Water resistant coating

Waterproof coatings: Usually polymer-based coatings that form a tough waterproof film on the surface of the battery case to prevent moisture infiltration.

Epoxy resin: has excellent adhesion and water resistance, commonly used as the inner layer protection of the battery shell, sealing and waterproof performance.

Composite Materials

Polymer composites: Combine the advantages of a variety of materials to form high-performance waterproof enclosures, such as polyurethane compounded with ceramic powder to improve its mechanical strength and water resistance.

Multi-layer structure: Multi-layer material design is used in the shell, the outer layer uses a good waterproof polymer, and the inner layer uses a high-strength material, so as to meet different performance requirements.

CONCLUSION

The waterproof material in the shell of the EPS battery cell is essential to improve battery safety and reliability. Effective waterproof design not only prevents battery dysfunction caused by moisture intrusion, but also protects the electronic components inside the battery to ensure their normal operation in a variety of environments.

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