Cylindrical Battery Cell Case for 18650, 26650, 21700, and 32650 Cells
PRODUCT PARAMETERS
Description
GELON supplies cylindrical lithium battery cell cases and caps for cell manufacturing, battery R&D, and cylindrical cell production lines. Our range covers 18650, 26650, 21700, and 32650 cell models, providing a practical lithium battery raw material solution for customers who need consistent case, cap, sealing, and insulation components.
The cases and caps are made of nickel-plated A3 steel, with nylon seal O-rings and spacers, and PET insulating gaskets. Model-dependent features include built-in PTC thermistor caps for over-current protection and safety valves for pressure release. GELON cylindrical cell cases are CE certified, with standard MOQ from 100 pcs, 7 working days delivery, and export packaging. For 21700 cell case specifications, please contact our sales team for the latest dimensions and cap options.
Available Models for Cylindrical Cell Production
| Model | Case Size (OD x ID x H) | Top Cap Size | Weight | Key Feature / Note |
|---|---|---|---|---|
| 18650 | 18mm OD x 17.5mm ID x 67mm H | 17.5mm D x 4.05mm H | 9.50 g/pcs | Cap with built-in PTC thermistor; safety valve opens at 2.5MPa |
| 26650 | 26mm OD x 25.5mm ID x 68mm H | 25.5mm D x 5mm H | 18.75 g/pcs | Safety valve opens at 2.8MPa |
| 32650 | 32mm OD x 31.5mm ID x 68mm H | 31.5mm D x 5.3mm H | 28.85 g/pcs | 32650 cylindrical cell case; 60 pcs/package reference |
| 21700 | Specifications on request | Specifications on request | Specifications on request | Available model; contact GELON for exact dimensions and cap configuration |
Note: 21700 detailed case and cap specifications are not listed in the current data sheet. Please contact us for the latest specification before ordering.
18650 Cylindrical Cell Case
The 18650 cell case is designed for cylindrical lithium-ion cell assembly and production. It uses a nickel-plated A3 steel case and cap, with a nylon seal O-ring and PET insulating gasket. The 18650 cap includes a built-in PTC thermistor for over-current protection.
18650 Cell Case Specifications：
- Case: 18mm OD x 17.5mm ID x 67mm H
- Top cap: 17.5mm D x 4.05mm H
- Top insulator: 12.5mm D x 0.19mm H
- Bottom insulator: 12.5mm D x 0.19mm H
- Weight: 9.50 g/pcs
- Safety valve opening pressure: 2.5MPa
- Cap: with built-in PTC thermistor
- Case and cap material: nickel-plated A3 steel
- Seal O-ring: nylon
- Insulating gasket: PET
26650 Cylindrical Cell Case
The 26650 cell case is suitable for larger-format cylindrical lithium cells. The cap design includes a safety valve that opens at 2.8MPa to release internal high pressure and help reduce explosion risk from the can.
26650 Cell Case Specifications：
- Case: 26mm OD x 25.5mm ID x 68mm H
- Top cap: 25.5mm D x 5mm H
- Weight: 18.75 g/pcs
- Safety valve opening pressure: 2.8MPa
- Case and cap material: nickel-plated A3 steel
- Seal O-ring: nylon
32650 Cylindrical Cell Case
The 32650 cell case is a large cylindrical cell case option for high-capacity cell designs. It offers a 32mm outer diameter and 68mm case height, with a matching top cap. Please confirm cap configuration, packing quantity, and safety valve details with GELON sales before bulk ordering.
32650 Cell Case Specifications：
- Case: 32mm OD x 31.5mm ID x 68mm H
- Top cap: 31.5mm D x 5.3mm H
- Weight: 28.85 g/pcs
- Case and cap material: nickel-plated A3 steel
- Seal O-ring: nylon
- Packaging note: 60 pcs per package reference
21700 Cylindrical Cell Case
GELON also supplies 21700 cylindrical cell cases for cylindrical lithium battery production. The current product data does not include fixed 21700 dimensions, so we do not display unverified specifications. Please send your required case dimensions, cap type, insulator requirements, and order quantity to our sales team.
Materials and Construction
GELON cylindrical cell cases use selected materials for sealing, insulation, and structural reliability:
- Case and cap: Nickel-plated A3 steel
- Seal O-ring and spacer: Nylon
- Insulating gasket: PET
- Cap option: Built-in PTC thermistor for over-current protection, model-dependent
- Safety valve: Available on specified models; 18650 opens at 2.5MPa, 26650 opens at 2.8MPa
- Insulators: Top and bottom insulators available for 18650 with 12.5mm D x 0.19mm H
These materials support cylindrical cell assembly and help maintain consistent sealing and insulation during production.
Cap, PTC Thermistor, and Safety Valve
The top cap is a critical part of a cylindrical cell case. GELON offers caps with a built-in PTC thermistor for over-current protection on applicable models. For safety, specified caps include a safety valve that opens at a rated pressure to release internal pressure and reduce the risk of can explosion.
- 18650 cap: built-in PTC thermistor; safety valve opens at 2.5MPa
- 26650 cap: safety valve opens at 2.8MPa
- 32650 and 21700: please confirm model-specific cap and valve configuration with sales
Applications
GELON cylindrical battery cell cases are suitable for:
- Cylindrical lithium-ion cell manufacturing
- Battery R&D and pilot production lines
- 18650, 26650, 21700, and 32650 cell assembly projects
- Battery testing line holders and fixture integration
- Battery equipment manufacturers and material distributors sourcing cylindrical cell cases
- Lithium battery raw material procurement for cylindrical cell production
Ordering Information
- Brand: GELON
- Place of Origin: Guangdong, China
- Certification: CE
- Model Number: 18650, 26650, 21700, 32650
- Minimum Order Quantity: 100 pcs
- Packaging: Standard export package
- Delivery Time: 7 working days
- Payment Terms: L/C, D/A, D/P, T/T, Western Union
- Supply Ability: 100,000 sets per month
- Optional Holder: Air plug holder for holder box or testing line; AC220V, 50Hz, power ≤20W — please confirm configuration before order
Packaging note: 32650 case package reference is 60 pcs per package. Please confirm final MOQ and packing quantity with GELON sales.
FAQ
Q1: What cylindrical cell case models does GELON supply?
A: GELON supplies 18650, 26650, 21700, and 32650 cylindrical battery cell cases. 21700 detailed specifications are available on request.
Q2: What materials are used in the cell case and cap?
A: The case and cap are made of nickel-plated A3 steel. Seal O-rings and spacers are made of nylon, and the insulating gasket is made of PET.
Q3: Does the cap include a PTC thermistor?
A: The 18650 cap includes a built-in PTC thermistor for over-current protection. For 26650, 32650, and 21700 caps, please confirm the exact cap configuration with our sales team.
Q4: What is the safety valve opening pressure?
A: The 18650 safety valve opens at 2.5MPa, and the 26650 safety valve opens at 2.8MPa. For 32650 and 21700, please confirm model-specific valve data before ordering.
Q5: What is the MOQ and delivery time?
A: The standard MOQ is 100 pcs. Delivery time is approximately 7 working days. For 32650 packaging, the reference is 60 pcs per package; please confirm with sales.
Q6: Are these products finished lithium batteries?
A: No. These are cylindrical cell cases, caps, seals, and insulating components used as lithium battery raw materials for cell production and assembly. They are not finished battery cells.
Q7: Can I request 21700 specifications?
A: Yes. Please contact GELON with your required 21700 case dimensions, cap type, insulator requirements, and order quantity. We will confirm the available specification.
Need a reliable cylindrical battery cell case supplier?
GELON provides 18650, 26650, 21700, and 32650 cylindrical cell cases with nickel-plated A3 steel construction, nylon sealing, PET insulation, and model-dependent PTC and safety valve features. Send your model, quantity, and destination today for a quotation.
About Us
FAQs
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LiBatteryEquip is a professional supplier specializing in complete Battery Laboratory Equipment,Lithium Battery Production Line, and Battery Testing Equipment. With over 20 years of experience in lithium battery material production, and battery equipment manufacturing, we provide customized lithium battery laboratory and pilot production line solutions for various research institutions and enterprises to meet their diverse needs. Our technical and management team possesses more than 20 years of expertise in the battery-related industry, consistently committed to delivering superior products and comprehensive services to our clients.
