18650 Cylindrical Battery Case Set (Nickel-Plated Steel Case + Explosion-Proof Cap + Gaskets)

Packaging Options:
18650 Case Kit (Case + Cap with Welded Tab + Top/Bottom Insulation Gaskets) – 100 sets/pack

Product Description:
18650 Cylindrical Battery Case & Shell Kit

Application:
Designed for the assembly of 18650 cylindrical lithium-ion batteries. The kit includes all necessary hardware (steel shell, safety cap, and insulation gaskets) for cell manufacturing.

Key Features:
* High-Quality Shell: The battery case is made from imported Japanese steel with nickel plating, offering superior strength and corrosion resistance.
* Safety Cap Assembly: Includes an explosion-proof cap with a built-in PTC thermistor and a pre-welded aluminum tab (15 mm x 3 mm x 0.15 mm), significantly simplifying the welding process.
* Complete Insulation: Supplied with both top and bottom insulation gaskets to ensure electrical isolation and safety within the battery pack.

Key Specifications:
Model: 18650
Case Material: Nickel-Plated Steel (Japan)
Cap Type: Explosion-Proof with PTC & Welded Tab
Packaging Unit: 100 Sets/Pack

Detailed Dimensions (Steel Case):
* Outer Diameter: 18.0 mm
* Inner Diameter: 17.5 mm
* Wall Thickness: 0.25 mm (Derived from OD/ID difference)

Detailed Component Dimensions (Cap Assembly) [Unit: mm]:
* Steel Cap: 16.38 x 1.8 x 0.5 (Nickel-plated Carbon Steel)
* PPTC Thermistor: 16.35 x 10.1 x 0.3 (Cu, Ni, PE, C)
* Explosion-Proof Disc: 16.35 x 1.32 x 0.3 (Aluminum)
* Sealing Ring: 17.45 x 4.3 x 0.5 (White PP)
* Connecting Plate: 12.85 x 1.23 x 0.5 (Aluminum)
* Spacer Ring: 13.2 x 0.90 x 0.3 (High-Temp Material)
* Welded Tab: 15 x 3 x 0.15 (Aluminum)

Technical Specifications (Cap Performance):
* Open Circuit Pressure: 0.9 – 1.4 MPa
* Burst Pressure: 1.8 – 2.5 MPa
* PTC Resistance: 12 – 15 mOhm
* Cap Internal Resistance: 12 – 20 mOhm
* PTC Current Rating: Non-trip 3.0 A | Trip 6.0 A
* Max Rating: Voltage 15 V | Current 40 A
* Trip Time (10 A): < 8 seconds
* Salt Spray Test: 5 Hours (Grade 10)