18650 Cylindrical Battery Cases with Anti Explosion Caps and Insulating Spacers

Product Overview

This cylindrical cell hardware set delivers a standardized, precision-engineered enclosure system designed specifically for the fabrication, testing, and pilot production of 18650 lithium-ion and advanced secondary batteries. Manufactured from premium 304 stainless steel and equipped with specialized pressure-relief cap assemblies, the enclosure maintains structural integrity under rigorous mechanical and electrochemical operating conditions. Each complete set includes the deep-drawn cylindrical can, a nickel-plated steel top cap with an integrated safety vent, an elastic nylon sealing O-ring, and top and bottom polypropylene insulating spacers, providing researchers and battery engineers with a complete, ready-to-crimp cell housing solution.

Designed primarily for academic research institutions, energy storage laboratories, and pilot-scale manufacturing facilities, this hardware enables repeatable cell construction across diverse cathode and anode chemistries. The system is particularly optimized for high-power cylindrical cell configurations where elevated discharge rates, rapid thermal cycling, and internal pressure dynamics demand superior mechanical strength and flawless electrical insulation. By standardizing physical dimensions and internal volume, the packaging system ensures consistent testing baselines for novel active materials, proprietary electrolyte formulations, and cell assembly processes.

Every component is manufactured to tight dimensional tolerances to guarantee seamless integration with standard laboratory grooving, winding, and crimping machinery. The chemically inert 304 stainless steel shell resists corrosion from aggressive organic carbonate electrolytes and lithium salts, while the robust mechanical construction prevents deformation during high-pressure crimping operations. Researchers can confidently evaluate long-term cycle life, thermal runaway behaviors, and electrochemical impedance spectroscopy without premature cell degradation caused by moisture ingress, electrolyte leakage, or mechanical packaging failure.

Key Features

• Corrosion-Resistant 304 Stainless Steel Housing: The deep-drawn cylindrical shell provides exceptional mechanical strength, pressure tolerance, and chemical passivity against standard non-aqueous lithium-ion battery electrolytes.
• Integrated Anti-Explosion Safety Vent: The specialized top cap incorporates an internal pressure-relief mechanism that safely vents excessive internal gas buildup, mitigating the risk of catastrophic cell rupture during high-rate overcharge or thermal abuse testing.
• Optimized for High-Drain Performance: Engineered specifically for high-power battery fabrication, the low-resistance nickel-plated steel cap ensures minimal internal resistance (IR) and reliable tab spot-welding for high continuous and pulse discharge currents.
• Hermetic Nylon Sealing O-Ring: Pre-fitted elastic nylon sealing rings provide long-term elasticity and chemical resilience, ensuring an airtight, moisture-proof seal when compressed during the mechanical crimping process.
• Precision Polypropylene (PP) Insulating Spacers: Dedicated top and bottom 0.12 mm PP spacers with centered 6.5 mm access holes prevent internal short-circuits between the electrode jelly roll, current collector tabs, and the outer metal housing.
• Strict Dimensional Consistency: Exact outer dimensions (18.15 mm outer diameter by 68.25 mm height) ensure total compatibility with standard automated and manual battery crimping dies, testing fixtures, and cell holders.
• Comprehensive Complete-Set Packaging: Supplied in complete packs of 100 sets, eliminating component mismatch and streamlining workflow efficiency across battery assembly lines.

Applications

Technical Specifications

Why Choose This Product

• Industrial-Grade Materials Selection: Built using premium 304 stainless steel shells and nickel-plated steel top caps, this hardware set eliminates localized pitting and electrochemical degradation, guaranteeing stable performance across hundreds of deep discharge cycles.
• Engineered Safety & Integrity: The integrated anti-explosion venting system provides reliable pressure-relief characteristics, safeguarding laboratory personnel, test channels, and environmental chambers from uncontrolled explosive ruptures during abuse evaluations.
• Flawless Mechanical Tolerances: Manufactured to strict dimensional standards, every shell and cap assembly interfaces seamlessly with standardized manual, pneumatic, and electric battery crimpers, ensuring hermetic sealing without buckling or crushing.
• Complete Ready-to-Use Kits: By supplying 100 matched sets of cans, vented caps, O-rings, and perforated PP insulating discs in a single package, preparation time is reduced and operational efficiency is maximized across research workflows.

Contact our technical sales team today to request volume pricing, confirm dimensional drawings, or discuss your customized battery assembly and material processing requirements.

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