Cell Lab 21700 cylinder cell case with anti-explosive cap and PTC protection – nickel-plated SPCC steel housing for lithium-ion battery research。
Cell Lab 21700 cylinder cell case with anti-explosive cap and PTC protection – nickel-plated SPCC steel housing for lithium-ion battery research。

Cell Lab 21700 Cylinder Cell Case [100 pcs]

Cell Lab 21700 Cylinder Cell Case [100 pcs] Durable and high-safety cylindrical case for 21700 lithium-ion battery cell research and assembly The Cell Lab 21700 Cylinder Cell Case is a precision-engineered, nickel-plated housing designed for lithium-ion battery prototyping, R&D, and...
Vendor: Cell Lab
SKU: CL0138
Product type: Battery Consumables
£359.00
£359.00
Subtotal: £359.00
Description
Description
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Cell Lab 21700 Cylinder Cell Case [100 pcs]

Durable and high-safety cylindrical case for 21700 lithium-ion battery cell research and assembly

The Cell Lab 21700 Cylinder Cell Case is a precision-engineered, nickel-plated housing designed for lithium-ion battery prototyping, R&D, and pilot-scale production. Built from SPCC-grade steel with nickel plating, it offers superior mechanical durability, corrosion resistance, and thermal reliability.

Each case integrates an anti-explosive pressure relief cap, nylon insulation O-ring, and a PTC thermistor that automatically cuts off current flow at 120 °C, effectively preventing thermal runaway and short-circuit failures. The structure follows standard 21700 dimensions for seamless assembly compatibility in laboratory and industrial applications.

Key Features

Precision Fit for 21700 Cells
Accurate internal and external dimensions (OD 21.5 mm, ID 21.1 mm, H 73.7 mm) for consistent electrode alignment and reliable sealing.

Anti-Explosive Safety Cap
Equipped with a 2.4 MPa pressure relief valve that vents excess gas to prevent overpressure or explosion.

Integrated PTC Thermistor
Built-in thermal protection system interrupts current above 120 °C to ensure operational safety.

Nickel-Plated Steel Construction
SPCC steel body provides high tensile strength and corrosion resistance for long-term stability.

Electrical Insulation O-Ring
Nylon ring isolates top and bottom terminals, minimising short-circuit risks during cell operation.

Technical Specifications

Parameter Value
Product Name 21700 Cylinder Cell Case
Quantity 100 pcs
Outer Diameter (OD) 21.5 mm
Inner Diameter (ID) 21.1 mm
Height (H) 73.7 mm
Cap Dimensions 21.0 mm (D) × 4.2 mm (H)
Safety Valve Activation Pressure 2.4 MPa
PTC Thermistor Cut-Off Temp. 120 °C
Net Weight per Piece 8.45 g
Case & Cap Material Nickel-plated SPCC steel
O-Ring Material Nylon

Applications & Industries

  • 21700 lithium-ion and LiFePO₄ battery development

  • EV power cells and energy storage system research

  • Safety and performance evaluation for cylindrical cells

  • Pilot-scale battery manufacturing and prototyping

  • Electrochemical R&D and custom battery module assembly

FAQ

Q1: Can these cases be used for EV-grade cell prototyping?
Yes. Their robust mechanical and thermal performance make them suitable for EV and ESS research applications.

Q2: Are the PTC and anti-explosive caps pre-installed?
Yes. Each case includes a fitted PTC thermistor and pressure relief valve.

Q3: Can I weld nickel tabs directly to the top cap?
Yes. The nickel-plated SPCC surface ensures excellent weldability and stable current conduction.

Q4: Are insulation O-rings included with every case?
Yes. Each set comes with integrated nylon O-rings for safe terminal isolation.

Q5: Does Cell Lab offer OEM customisation?
Yes. OEM engraving and custom packaging are available for research labs and manufacturers.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.