18650 Cylindrical Battery Steel Case + Explosion-Proof Cap + Upper & Lower Insulation Sheets — Cylindrical Battery Case Set

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Model:18650/21700 case ket
 Surface Finish​:Pre-nickel plated steel
 Shell and Cover Material​​:Nitric acid nickel-plated A3 steel
 ​​Sealing O-ring and Washer Material:Nylon
 Gasket:PET
 ​​Wall Thickness:0.2-0.3mm
 MOQ:50pcs
 Leading time: 5-8 working days

SKU: 18650/21700 case ket Category:

18650/21700 Cylindrical Battery Steel Case + Explosion-Proof Cap + Upper & Lower Insulation Sheets — Cylindrical Battery Case Set

Our pre-assembled 18650/21700 case set integrates high-strength steel casing, reliable explosion-proof cap, and premium insulation sheets—designed to streamline your battery production while maximizing safety and performance.

Key Features & Advantages

  • Professional Standards: Multi-process stamped construction using high-quality materials with no production shortcuts
  • Reliable Performance: Specialized structural design provides dependable power-off and explosion-proof functionality with stable internal pressure
  • Quality Assurance: Rigorous dimensional inspections using advanced testing equipment to ensure compliance with standards
  • Custom Solutions: Manufacturer-direct support for custom specifications based on provided drawings

Technical Specifications

Component Parameter Specification
Steel Case Material Pre-nickel plated steel shell
Dimensions Φ18mm × 65mm /Φ21mm ×70mm(customizable)
Wall Thickness 0.2-0.3mm
Surface Treatment Electroplating/Passivation
Explosion-Proof Cap Shell and Cover Material Nitric acid nickel-plated A3 steel
Sealing O-ring and Washer Material Nylon
Gasket PET
Insulation Sheets Material PP (Polypropylene)
Thickness 0.15-0.2mm
Heat Resistance ≤120℃

Applications

  • Core Component: Essential structural element for cylindrical battery assemblies
  • Primary Industry: New energy battery manufacturing supply chain
  • Specific Uses: Automotive power lithium battery R&D/production and 3C
  • Experimental materials

Why Choose Our Product?

  • Technical Innovation: Optimized for high-energy-density battery applications
  • Comprehensive Service: Full support from prototyping to mass production
  • Protected Packaging: Vacuum-sealed to prevent oxidation during transit
  • Flexible Ordering: Negotiable MOQ with urgent order availability