Slotted 18650 Cylindrical Battery Case Set - Pre-Nickel-Plated Steel Shell + Insulation Gaskets + Explosion-Proof Cap

Our all-in-one set combines a precision slotted pre-nickel-plated steel shell, reliable explosion-proof cap, and premium insulation gaskets—designed to solve electrode tab alignment pain points while ensuring top-tier battery performance.

The Slotted 18650 Cylindrical Battery Case Set is a game-changer for 18650 lithium-ion battery manufacturing. Unlike standard cases that require complex tab positioning, this set features a precision slotted steel shell that aligns electrode tabs effortlessly—cutting assembly time by 40% and reducing tab damage risks. Each set includes 1x pre-nickel-plated slotted steel shell, 1x explosion-proof safety cap, and 2x upper/lower insulation gaskets—all pre-matched to 18650’s standard dimensions (18mm diameter × 65mm height). Crafted for consumer electronics, portable power tools, and small energy storage devices, this set balances ease of production, durability, and safety in every component.

• Precision Slot Design: 2-4 pre-cut slots (width: 1.5-2.0mm) align perfectly with electrode tabs, eliminating manual positioning errors and tab bending.
• Pre-Nickel Plating: 3-5μm nickel coating enhances solderability, corrosion resistance, and electrical conductivity—ideal for automated welding processes.
• High-Strength Material: 304 stainless steel with 0.22-0.3mm wall thickness, withstands impact and pressure without deformation.
• Smooth Inner Finish: Polished inner surface prevents damage to battery cores during assembly and improves electrolyte wettability.

• Pressure-Activated Relief: Triggers at 1.1-1.4MPa to release excess gas, preventing battery explosion due to overcharging or short circuits.
• Low-Resistance Core: Copper core with tin plating ensures contact resistance ≤4mΩ, minimizing energy loss during charge-discharge.
• Leak-Proof Sealing: Heat-resistant silicone O-ring creates an airtight seal with the steel shell, stopping electrolyte leakage.
• Drop-Test Certified: Passes 1.5m drop test without cap detachment, ensuring structural stability in harsh conditions.

• High-Temperature Resistance: Made of flame-retardant PP material, stable at -40℃ to 130℃—meets UL94 V-0 flammability standard.
• Precision Die-Cut: Custom-fit to 18650 dimensions, covering tab connections to prevent short circuits between positive/negative electrodes.
• Thickness Optimization: 0.18-0.22mm thickness balances insulation performance and battery energy density.
• Anti-Ageing Property: Resists electrolyte erosion and oxidation, maintaining insulation effectiveness for over 5 years.

• Slotted Design for Efficiency: Pre-cut slots eliminate manual tab alignment, cutting assembly labor costs and reducing production errors by 50%.
• Pre-Nickel Plating Advantage: Improves welding efficiency and conductivity, compatible with automated spot welding and laser welding lines.
• All-in-One Compatibility: Components are pre-matched to avoid fitment issues—no need to source shells, caps, and gaskets from multiple suppliers.
• Strict Quality Assurance: Each set undergoes dimension inspection, pressure testing, and insulation resistance testing—100% qualified before shipment.
• Scalable Supply: Annual production capacity of 400 million sets, supporting small-batch trials and large-scale mass production.