Description
18650 Cylinder Cell Case
The 18650 Cylinder Cell Case remains one of the most widely used formats for both primary and secondary lithium-ion batteries due to its mechanical robustness and standardized form factor. Manufactured from high-strength nickel-plated A3 steel, the case offers excellent durability under high internal pressures. The design incorporates a built-in PTC thermistor cap and a safety valve that activates at 2.5 MPa, providing vital protection against thermal runaway and overpressure scenarios. With integrated top and bottom insulators, nylon spacers, and a lightweight construction, it is a preferred solution for battery integration in portable electronics, electric vehicles, and industrial energy systems.
Technical Properties
| Parameter | Specification |
|---|---|
| Cap | Cap with Built-in PTC Thermistor |
| Case Dimensions | 18 mm (OD) x 17.5 mm (ID) x 67 mm (H) |
| Top Cap Dimensions | 17.5 mm (D) x 4.05 mm (H) |
| Top Insulator | 12.5 mm (D) x 0.19 mm (H) |
| Bottom Insulator | 12.5 mm (D) x 0.19 mm (H) |
| Materials | Nickel-plated A3 steel (Case & Cap); Nylon (Seal O-ring & Spacer) |
| Weight | 9.50 g/piece |
| Safety Valve Activation | Opens at ≥2.5 MPa to prevent explosion |
Applications
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Used in the assembly of 18650 lithium-ion battery cells
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Suitable for high-pressure environments thanks to its strong cylindrical structure
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Ideal for electric vehicle (EV) battery packs
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Commonly used in laptops, power tools, drones, and portable electronics
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Built-in anti-explosive safety features make it appropriate for industrial and high-performance battery systems
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Compatible with automated battery pack assembly lines