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Aluminum-Coated Wave Spring for Coin Cells
WAVE SPRING
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Application and Purchase InformationAssembly Function: Provides support force and helps maintain internal electrical contact Surface Treatment: Aluminum-coated 304 stainless steel Purchase Confirmation: Confirm spring dimensions, coating coverage, and package quantity before ordering
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Brand: ATOMFAIR®
How does the 1 µm aluminum coating thickness affect electrical contact resistance in coin cell assemblies?
The 1 µm aluminum coating (99.9% purity) provides a low-resistance, corrosion-resistant surface for maintaining electrical contact, while the 304 stainless steel base ensures mechanical strength. The thin coating minimizes contact resistance without significantly altering the spring's mechanical properties, supporting reliable internal contact in coin cell assemblies.
What are the exact dimensional specifications of this wave spring, and how do they affect compatibility with standard coin cell cases?
The wave spring has an outer diameter of 14.5 mm, inner diameter of 10.25 mm, height of 1.20 ± 0.05 mm, and thickness of 0.30 mm. These dimensions are designed to fit within coin cell cases that accommodate a 14.5 mm OD spring, providing consistent contact pressure for standard coin cell assemblies.
Why is 99.9% aluminum purity specified for the coating on this wave spring?
The 99.9% aluminum purity minimizes impurities that could introduce unwanted electrochemical reactions or increase contact resistance in battery testing. This high-purity coating ensures stable electrochemical behavior and consistent electrical performance in coin cell assemblies.
This aluminum-coated wave spring designed for coin cell assemblies provides a 99.9% pure aluminum contact surface on a 304 stainless steel base, with precise dimensions (OD 14.5 mm, ID 10.25 mm, height 1.20 mm) to deliver consistent spring force and electrical contact. However, the thin 1 µm coating requires careful handling to avoid damage, and the specific dimensions restrict use to compatible coin cell housings.
Positive
- High-purity aluminum coating for electrochemical compatibility: The 99.9% aluminum coating provides a corrosion-resistant, low-contamination contact surface suitable for coin cell assemblies, reducing the risk of unwanted side reactions.
- Precise dimensional tolerances for consistent assembly: The spring height tolerance of ±0.05 mm and specified outer/inner diameters ensure reproducible compression and electrical contact force across batches.
Trade-offs
- Thin coating susceptible to mechanical damage: The approximately 1 µm aluminum coating may be abraded or scratched during handling or assembly, potentially exposing the underlying 304 stainless steel and altering electrochemical performance.
- Dimensions limit coin cell compatibility: With an outer diameter of 14.5 mm and inner diameter of 10.25 mm, this spring is designed for specific coin cell form factors (e.g., CR2032) and may not fit other cell sizes without modification.
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).
