ATOMFAIR® 21700 CYLINDRICAL BATTERY CASE KITS (100 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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This document outlines critical handling and storage constraints for ATOMFAIR 21700 cylindrical battery case kits to ensure safe operation and data repeatability. Compliance with specified environmental conditions and cell compatibility requirements is mandatory to prevent failure modes such as overpressure venting or corrosion.
- Storage Environment: Store the kit at 0–35 °C and ≤75% relative humidity away from heat sources and volatile gases.
- Shelf Life: The kit has a one-year shelf life when sealed; use immediately after opening vacuum packaging.
- Cell Compatibility: Only use standard 21700 flat-top bare cells without built-in PCB protection boards.
- Pressure Safety: The internal burst disc activates at 1.8–2.4 MPa to vent overpressure; current disconnect occurs at 0.8–1.3 MPa.
- Assembly Environment: Pre-welded aluminum tabs reduce the need for manual welding in glovebox or cleanroom environments.
How does the ultra-low internal resistance of ≤0.5 mΩ affect the safety burst disc activation thresholds in these 21700 battery case kits?
The power-type ultra-low resistance structure (≤0.5 mΩ) is designed to minimize heat generation under high-current discharge, but it does not compromise safety thresholds. The integrated aluminum safety burst disc is set to activate at a current disconnect pressure of 0.8–1.3 MPa and a bursting vent at 1.8–2.4 MPa, ensuring pressure relief operates independently of the low-resistance design. This combination allows researchers to safely evaluate high-rate cycling without exceeding mechanical containment limits.
What type of 21700 cells are compatible with these battery case kits and what integration constraints exist?
These kits are compatible only with standard 21700 cylindrical bare cells in flat-top configuration without built-in PCB protection boards. The internal dimensions (e.g., inner diameter 20.71 ± 0.05 mm) and pre-formed insulating rings (φ14.4 × 0.93 mm PBT) are sized for unprotected cells. Cells with button-top terminals or integrated protection circuits will not fit properly and may interfere with the safety burst disc and sealing O-ring, compromising assembly integrity.
What are the critical storage and handling requirements to maintain the performance and safety of these 21700 battery case kits?
Store the sealed kits at 0–35 °C and ≤75% RH, away from localized heat sources or volatile gases. The sealed shelf life is 1 year; after opening the vacuum packaging, immediate deployment is recommended to preserve the nickel-plated finish and corrosion resistance (verified by 5-hour salt spray test, Grade 10). Avoid exposure to moisture or contaminants that could degrade the pre-welded aluminum tabs or O-ring seal.
This 21700 battery case kit provides pre-welded aluminum tabs and a ≤0.5 mΩ power-type cap for high-current prototyping, but requires flat-top bare cells without PCB and demands strict environmental storage control.
Positive
- Ultra-Low Internal Resistance ≤0.5 mΩ: Power-type cap structure maintains contact impedance below 0.5 mΩ, suppressing heat generation under high-current discharge testing.
- Factory Pre-Welded Tabs for Rapid Assembly: Pre-welded 20×4×0.15 mm aluminum tabs eliminate manual tab attachment, reducing glovebox and cleanroom processing time.
Trade-offs
- Requires Flat-Top Bare Cells Without PCB: Designed exclusively for standard 21700 flat-top bare cells without integrated PCB protection boards; incompatible with protected cells or button-top configurations.
- Controlled Storage and Limited Shelf Life: Optimal performance requires storage at 0–35 °C and ≤75% RH; sealed shelf life is one year, and components should be used promptly after vacuum opening.
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 excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
