Pre-Slotted 21700 Pre-Nickel Coated Steel Battery Shell With Safety Explosion Insulation Gaskets Proof Cap Insulation Pads
Our all-in-one 21700 battery shell set combines a pre-slotted pre-nickel coated steel shell, explosion-proof cap, and dual insulation gaskets/pads—engineered for efficient assembly and maximum safety of cylindrical lithium batteries. The pre-slotted design aligns electrode tabs effortlessly, while the pre-nickel coating enhances weldability and conductivity. Crafted for 21700 standard dimensions (21mm diameter × 70mm height), this set is ideal for EVs, energy storage systems, electric tools, and portable electronics, streamlining production and ensuring reliable battery performance.
✅ Pre-Slotted & Pre-Nickel Coated: 2-4 precision slots (1.5-2.0mm width) eliminate tab alignment errors; 3-5μm nickel plating enables fast welding and anti-corrosion.
✅ All-In-One Safety Kit: Explosion-proof cap (1.2-1.5MPa pressure relief) + double insulation gaskets/pads prevent short circuits and leakage.
✅ High-Strength Material: 304 stainless steel shell (0.25-0.35mm wall thickness) resists deformation and dissipates heat efficiently.
✅ Perfect Compatibility: Strictly fits 21700 lithium batteries, compatible with automated assembly lines.
✅ Ready-to-Use: Pre-matched components save assembly time by 35%, reducing production costs.
| Parameter | Specification |
|---|---|
| Product Model | Pre-Slotted 21700 Battery Shell Set |
| Shell Material | 304 Stainless Steel (Pre-Nickel Coated) |
| Nickel Plating Thickness | 3-5μm |
| Slot Quantity/Size | 2-4 slots, 1.5-2.0mm width (customizable) |
| Dimensions | 21mm (D) × 70mm (H) |
| Shell Wall Thickness | 0.25-0.35mm |
| Explosion-Proof Cap Relief Pressure | 1.2-1.5MPa |
| Insulation Material | Flame-Retardant PP (UL94 V-0) |
| Insulation Thickness | 0.18-0.22mm |
| Packaging | 100 sets/carton, moisture-proof packaging |
- Electric Vehicles (EVs), hybrid electric vehicles (HEVs)
- Energy Storage Systems (ESS), portable power stations
- High-power electric tools (drills, grinders)
- Consumer electronics (portable speakers, large-capacity power banks)
- Medical devices, industrial backup power supplies
1.Stable Supply Capacity: Annual output 300 million sets, supporting bulk orders with 10-20 days delivery.
2.Strict Quality Control: 100% inspection for dimensions, plating, pressure resistance, and insulation—COA provided.
3.Customization Support: Tailor slot quantity/size, plating thickness, and insulation material.
4.Free Samples: Offer 5-10 sets free samples for performance testing.
5.Global Logistics: Cooperate with major shipping lines, support sea/air shipping and customs clearance.
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