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.

• 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.