Description
ATOMFAIR® 4680 TABLESS CYLINDRICAL BATTERY CELL ASSEMBLY KITS (25 SETS/PACK)RESEARCH GRADE MATERIAL
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TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official quotations.
EMAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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The kit components require electrolyte-resistant nickel-plated steel and nano-grade surface finishing to prevent contamination and ensure hermetic laser welding. Strict dimensional tolerances on casing diameter and height are critical for maintaining structural integrity during mechanical cycling and pack-level testing.
- Electrolyte Compatibility Constraint: All components must be stored in a dry, inert atmosphere to prevent oxidation and moisture adsorption that compromise electrolyte resistance and weld integrity.
- Surface Roughness Requirement: Cap mating and mouth roughness must be maintained at Ra 0.1–0.2 μm to enable reliable hermetic laser welding without porosity or leakage.
- Dimensional Tolerance Control: Assembled total height must be held within 81.0 +0.2/-0.15 mm to ensure consistent compression and electrical contact in tabless electrode designs.
- Handling and Storage: Components must be handled with clean, powder-free gloves in a controlled environment to avoid particulate contamination that disrupts laser welding and sealing.
How do the Ra 0.1 μm cap mating roughness and ≤0.05 mm bottom runout affect hermetic sealing and electrical contact resistance when laser welding 4680 tabless cell assemblies?
The Ra 0.1 μm cap mating finish and ≤0.05 mm bottom runout minimize interfacial gaps and ensure uniform contact stress, enabling airtight, low-resistance laser welds crucial for tabless high-current paths. These nano-grade tolerances prevent data distortion from variable contact resistance or leakage during electrochemical testing.
Which 4680 tabless cell variants are compatible with this assembly kit, and what critical dimensional constraints must the bare cell meet?
The kit is fully optimized for standard 4680 tabless bare cells with a flat head and no BMS, requiring an outer diameter of φ46 +0.05/-0.2 mm and a total assembled height of 81.0 +0.2/-0.15 mm. Cells outside these dimensional tolerances, or those with attached electronics or modified terminals, will not seat properly and risk seal failures.
What intrinsic safety and pressure management features are built into this 4680 cell assembly kit to mitigate thermal runaway risks during high-rate cycling?
Each kit includes an anti-explosion cap with an integrated safety valve for passive pressure relief, paired with a high-temperature chemical resistant insulating gasket to prevent internal short circuits. The imported Japanese nickel-plated steel casing also provides the mechanical strength to contain venting events, but these components are intended for professional laboratory research use only.
This evaluation covers the Atomfair 4680 tabless assembly kit, which provides nano-grade surface finishes (Ra 0.1 μm) and tight dimensional tolerances (bottom runout ≤0.05 mm) for reliable hermetic sealing and low internal resistance in prototype cell assembly, but requires precision laser welding equipment and is specifically limited to tabless 4680 cells without BMS.
Positive
- Nano-grade surface finish for hermetic sealing: Cap mating and outer surface roughness down to Ra 0.1 μm, with bottom runout ≤0.05 mm, ensures uniform contact and enables airtight laser welding, critical for consistent electrochemical data.
- Tabless-optimized low-resistance architecture: Dedicated tabless geometry lowers internal ohmic resistance and improves heat dissipation during high-rate testing, delivering undistorted performance evaluation for large-format cells.
Trade-offs
- Requires precision laser welding for assembly: The ultra-precise cap mating surface (Ra 0.1 μm) is designed for airtight hermetic laser welding, mandating access to appropriate welding equipment and cleanroom conditions to maintain seal integrity.
- Limited to tabless 4680 cells without BMS: Kit is optimized for standard 4680 tabless bare cells with flat head and no battery management system, restricting compatibility to this specific architecture and excluding other form factors or integrated electronics.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
