Slotted 18650 Battery Case Set: Engineered for Easy Assembly & Maximum Safety
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.
Product Overview
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.
Core Components: Innovation in Every Detail
1. Pre-Nickel-Plated Slotted Steel Shell
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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.
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Pre-Nickel Plating: 3-5μm nickel coating enhances solderability, corrosion resistance, and electrical conductivity—ideal for automated welding processes.
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High-Strength Material: 304 stainless steel with 0.22-0.3mm wall thickness, withstands impact and pressure without deformation.
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Smooth Inner Finish: Polished inner surface prevents damage to battery cores during assembly and improves electrolyte wettability.
2. Explosion-Proof Safety Cap
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Pressure-Activated Relief: Triggers at 1.1-1.4MPa to release excess gas, preventing battery explosion due to overcharging or short circuits.
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Low-Resistance Core: Copper core with tin plating ensures contact resistance ≤4mΩ, minimizing energy loss during charge-discharge.
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Leak-Proof Sealing: Heat-resistant silicone O-ring creates an airtight seal with the steel shell, stopping electrolyte leakage.
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Drop-Test Certified: Passes 1.5m drop test without cap detachment, ensuring structural stability in harsh conditions.
3. Insulation Gaskets
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High-Temperature Resistance: Made of flame-retardant PP material, stable at -40℃ to 130℃—meets UL94 V-0 flammability standard.
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Precision Die-Cut: Custom-fit to 18650 dimensions, covering tab connections to prevent short circuits between positive/negative electrodes.
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Thickness Optimization: 0.18-0.22mm thickness balances insulation performance and battery energy density.
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Anti-Ageing Property: Resists electrolyte erosion and oxidation, maintaining insulation effectiveness for over 5 years.
Technical Specifications
| Component |
Parameter |
Specification |
| Slotted Steel Shell |
Material |
Pre-Nickel-Plated Steel |
| Dimensions |
Φ18mm × 65mm |
| Wall Thickness |
0.22-0.3mm |
| Nickel Plating Thickness |
3-5μm |
| Slot Quantity/Size |
2-4 slots, 1.5-2.0mm width |
| Explosion-Proof Cap |
Pressure Relief Value |
1.1-1.4MPa |
| Contact Resistance |
≤4mΩ |
| Sealing Material |
Silicone O-ring |
| Insulation Gaskets |
Material |
Flame-Retardant PP |
| Thickness |
0.18-0.22mm |
| Flammability Rating |
UL94 V-0 |
Why This Set Stands Out for Your Production
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Slotted Design for Efficiency: Pre-cut slots eliminate manual tab alignment, cutting assembly labor costs and reducing production errors by 50%.
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Pre-Nickel Plating Advantage: Improves welding efficiency and conductivity, compatible with automated spot welding and laser welding lines.
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All-in-One Compatibility: Components are pre-matched to avoid fitment issues—no need to source shells, caps, and gaskets from multiple suppliers.
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Strict Quality Assurance: Each set undergoes dimension inspection, pressure testing, and insulation resistance testing—100% qualified before shipment.
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Scalable Supply: Annual production capacity of 400 million sets, supporting small-batch trials and large-scale mass production.
