Kingchi 21700 5500mAh Li-ion Cell | OEM Manufacturer & Industrial Wholesale Supply
Kingchi 21700 5500mAh Li-ion Cell | OEM Manufacturer & Industrial Wholesale Supply
Bulk source Kingchi 21700 5500mAh (3.6V, 19.8Wh) cylindrical cells. Reliable high-capacity lithium battery manufacturing for global industrial OEMs.
Flexible MOQ and competitive pricing for bulk orders!
Description
The Kingchi 21700 5500mAh Li-ion Cell is a high-energy cylindrical rechargeable cell engineered for integration into industrial-grade battery packs. Operating at a nominal voltage of 3.6V (with a max charge voltage of 4.2V) and delivering 19.8Wh of nominal energy, this cell provides stable electrical performance for power tools, e-bikes, portable electronics, and commercial energy storage packs.
As an established manufacturer, Kingchi supplies these cells directly to global distributors, battery pack assemblers, and OEM procurement teams. Our modern manufacturing lines prioritize strict batch-to-batch consistency, providing enterprise buyers with a reliable supply chain for scalable production runs. Sourcing directly from our Huizhou factory ensures structured cost optimization and complete transparency regarding raw material origins and performance specifications.
Industrial Application Scenarios for the 21700 5500mAh Cell
Heavy-Duty Industrial Power Tool Battery Assemblies
High-torque power tools demand consistent current output and structural durability under high mechanical vibration. Sourcing the Kingchi 21700 5500mAh cell allows engineering teams to design lightweight battery packs without compromising runtime or thermal safety. The low internal resistance of our cylindrical cells reduces internal heat generation during heavy tool operations, protecting electronic components from over-temperature cutoffs. Sourcing managers can deploy these cells in cordless saws, industrial drills, and specialty construction machinery battery systems.
Light Electric Mobility and E-Bike Battery Packs
In electric mobility and e-bike sectors, maximizing volumetric energy density is critical to achieving competitive range targets. By utilizing the 19.8Wh nominal energy footprint of the Kingchi 21700 cell, designers can construct highly efficient lithium battery packs that occupy minimal frame space. The structural strength of our cylindrical steel cans provides excellent resistance against physical impacts, protecting vehicle operators and ensuring longer service lifespans across diverse fleet applications.
Commercial Energy Storage Systems and Pack Configurations
For scalable battery banks and portable power stations, multiple 21700 cells are arranged in series-parallel grids. The 5500mAh capacity simplifies parallel packing, allowing pack builders to construct complex energy storage networks with fewer total cells. This reduction in cell count reduces the complexity of Battery Management System (BMS) wiring and minimizes potential points of failure. These cells are ideal for off-grid industrial equipment, telecommunications backup power, and portable field generator systems.
Technical Features and Electrical Performance
Voltage Stability Under Continuous Load
- 3.6V Nominal Operating Voltage: Provides a stable voltage plateau across the major discharge curve, optimizing energy transfer efficiency.
- 4.2V Max Charge Limit: Allows standard commercial multi-bay chargers to complete recharge cycles safely within standardized charging protocols.
- Controlled Energy Output: Delivers a reliable 19.8Wh capacity, ensuring predictable performance matrices for high-drain commercial equipment.
Standardized 21700 Cylindrical Dimensioning
- Precise Mechanical Footprint: Manufactured with tight physical tolerances (21mm diameter, 70mm height) for seamless compatibility with automated pack-assembly machinery.
- Optimized Airflow Spacing: The cylindrical architecture naturally creates ventilation gaps between grouped cells, lowering active cooling demands.
- Steel Shell Protection: Protects internal electrode sheets from external crushing forces and accidental puncture during harsh handling operations.
High Capacity and Chemical Endurance
- 5500mAh Nominal Capacity: Maximizes single-cell storage volume, enabling product engineers to specify smaller total cell counts in custom designs.
- Minimal Self-Discharge Rates: Formulated with high-grade active chemistries that reduce natural energy loss during extended warehousing or shipping.
- Predictable Degradation Profiling: Ensures long-term pack balancing and uniform wear characteristics, which minimizes overall warranty and replacement claims.
OEM Customization and Private Label Integration
Private Label Wrap and Traceability Printing
We provide customizable outer PVC wraps for high-volume wholesale contracts. Distributors can request custom wrap colors, enterprise brand logos, and specific terminal markings for easy inventory identification. Each cell is printed with unique batch codes, allowing complete material and processing traceability throughout the entire supply chain cycle.
Custom Terminal Tab Welding and Configuration
Our production lines can perform automated spot-welding of nickel tabs based on client schematics. This service reduces manual labor requirements for overseas pack assemblers. Sourcing teams can receive ready-to-assemble cell clusters, complete with parallel or series nickel ribbons designed to integrate directly with internal BMS boards.
Tailored Packaging and Export Configuration
We engineer export packaging to withstand severe transport conditions. Cells are shipped in custom anti-static trays, double-walled corrugated cartons, and stabilized pallets optimized for shipping containers. This rigorous packing strategy prevents physical cell movement and contact short circuits during sea, rail, or air transit.
Kingchi 21700 5500mAh Technical Data Sheet
| Technical Specifications | Commercial Standards & Details |
| Brand | Kingchi |
| Model Number | 21700 |
| Cell Type | Cylindrical Li-ion Rechargeable Cell |
| Nominal Voltage | 3.6V |
| Maximum Charge Voltage | 4.2V |
| Nominal Capacity | 5500mAh |
| Nominal Energy | 19.8Wh |
| Housing Construction | Nickel-Plated Steel Shell |
| Product Adaptability | Power tools, e-bikes, portable electronics, energy storage packs |
| Environmental Tolerances | Performance verified under standard temperature cycles |
| Compliance Status | Compliant with applicable international standards upon request |
| Minimum Order Quantity (MOQ) | Contact procurement team for current stock and wholesale limits |
| Lead Time | 20–35 days for typical bulk industrial procurement contracts |
Quality Control and Batch Consistency Assurance
“In large-scale battery pack assembly, cell-to-cell variance is the primary point of failure. Our production lines prioritize strict electrochemical consistency. By minimizing deviations in internal resistance, capacity, and voltage across production batches, we protect our OEM clients from field failures and premature pack degradation. Our engineering philosophy is anchored in mechanical repeatability and data-driven quality control.” — Director of Engineering, Kingchi
Factory Operations and Procurement Quality Management
- Incoming Quality Control (IQC): We perform rigorous purity checks on active raw materials, separator membranes, and steel housings before production.
- In-Process Quality Control (IPQC): Automated lasers measure electrode coating thickness and density in real-time to prevent cell imbalance.
- Final Quality Control (FQC): Every finished batch undergoes mandatory multi-day aging tests and voltage-drop monitoring to isolate outliers.
- Acceptable Quality Limit (AQL) Inspections: Standardized sampling plans are executed for mechanical tolerances, leak resistance, and thermal performance.
- Custom Packing Optimization: Cells are secured in heavy-duty molded trays, preventing terminal contact and mitigating vibration damage.
- Logistics Coordination Support: Our freight team manages global dangerous goods documentation, securing safe passage through international customs points.
Bulk Procurement and Sourcing FAQ
Q: Can we order custom terminal welding on the Kingchi 21700 cells for our assembly line?
A: Yes. We offer terminal tab customization, including spot-welding of pure nickel or nickel-plated steel tabs in specific directions. Sourcing managers must provide CAD designs or technical drawings showing preferred configurations to coordinate tool set up. This helps streamline your pack assembly line.
Q: What is the typical lead time for a bulk wholesale container shipment?
A: Standard wholesale lead times run between 20 to 35 business days from order confirmation and payment. This timeline covers custom manufacturing, capacity grading, final aging, and export packaging preparation. Quick-ship options may be available for in-stock, unbranded cells.
Q: Can your team manufacture complete custom battery packs using this 21700 cell?
A: Yes. We can integrate these cells into custom configurations. We engineer and assemble specialized battery packs complete with custom protection circuits (PCMs) or smart BMS solutions to match your specific system voltage and run-time requirements.
📬 Ready to Elevate Your Business? Contact Our Expert Team!
Looking for a reliable manufacturer or custom OEM/ODM solutions? Get in touch with Kingchi today for a quick quote and product samples.
- 📧 Email: sales@Kingchipower.com
- 📞 Phone/WhatsApp: +86 17807659568
- 🏢 Factory Address: 2nd Floor, Building B, Zhiqiang High-tech Industrial Park, Sjiaolou, Luoyang Sub-district, Boluo County, Huizhou City, Guangdong Province, China
