Battery Coating Slot Die Shim Plate Stainless Steel Precision Spacer
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Product parameters
Parameter | Specification / Industry Range |
Material | Stainless Steel 304 / 316 / 316L (others on request: brass, copper) |
Thickness | 0.01 – 0.50 mm (ultra-thin precision control) |
Thickness Tolerance | ±0.002 – ±0.01 mm |
Flatness | ≤ 0.01 mm (depending on size) |
Profile Tolerance | ±0.01 – ±0.02 mm |
Hole Diameter | ≥ 0.10 mm (etching capability) |
Minimum Feature Size | ≥ 0.10 mm |
Edge Quality | Burr-free, smooth edge (chemical etching) |
Surface Finish | Matte / Brushed / Electro-polished / Passivated |
Hardness | Annealed / Half-hard / Full-hard (customizable) |
Etching Process | Double-sided chemical etching |
Additional Process | Laser cutting / CNC machining (hybrid processing available) |
Coating Compatibility | Solvent-based / Water-based / High-viscosity slurry |
Temperature Resistance | Up to 400°C (depending on material) |
Assembly Type | Bolt-fixed / Stackable shim system |
Customization | Fully OEM based on drawings (DXF / CAD / PDF) |
Application | Slot die coating / battery coating / film coating / precision fluid control |
Product Description
Product Description
Stainless steel slot die shim plate specifically engineered for battery coating applications, providing precise spacing and thickness control for electrode coating processes. This precision spacer ensures stable slurry flow, consistent coating width, and improved product uniformity, making it suitable for high-speed lithium battery production lines.
Application Field
Lithium-ion battery coating machines
Anode and cathode slurry coating
Energy storage system production
EV battery manufacturing
Battery Coating Slot Die Shim Plates: Engineering for Corrosion Resistance and Consistency
In the rapidly evolving landscape of new energy vehicles (NEVs) and energy storage systems (ESS), the performance of lithium-ion batteries is paramount. At the heart of battery manufacturing lies the coating process, where the anode and cathode slurries are applied to current collectors. This process demands absolute precision.
Our Battery Coating Slot Die Shim Plates are engineered specifically to meet the rigorous demands of this industry. We understand that in battery production, a shim is not just a spacer; it is a critical component that dictates cell capacity, safety, and longevity.
The Challenge: Aggressive Slurries and Micron-Level Tolerances
Lithium battery manufacturing is a harsh environment for precision tooling. The slurry used for cathodes (often containing NMC, LCO, or LFP) and anodes (graphite/silicon) is not only abrasive but chemically aggressive. Furthermore, the solvents used, such as NMP (N-Methyl-2-pyrrolidone) in cathode coating, require materials that can withstand prolonged chemical exposure without degrading.
- The Corrosion Risk: Standard metals can corrode when exposed to battery slurries and solvents. This corrosion leads to pitting on the shim surface, which causes slurry buildup, coating streaks, and eventually, metal contamination in the battery cell—a critical safety hazard.
- The Consistency Requirement: Modern high-energy batteries require coating thickness tolerances within ±1µm. Any deformation in the shim due to material fatigue or stress can result in "thick edges" or uneven coating weight, leading to rejected batches.
Material Science: Why We Choose SUS316 and High-Grade Stainless Steel
To combat these challenges, our factory prioritizes material selection that ensures long-term stability. While we manufacture shims from various alloys, for battery applications, we strongly advocate for SUS316 and SUS316L stainless steel.
SUS316 vs. SUS304 in Battery Environments:
While SUS304 is a standard industrial stainless steel, SUS316 contains molybdenum, which significantly increases its resistance to chlorides and acidic components often found in electrolyte residues or specific slurry formulations.
- Superior Corrosion Resistance: Our SUS316 shims resist pitting and crevice corrosion, ensuring the surface remains smooth even after months of operation.
- Chemical Stability: It maintains integrity when cleaned with harsh solvents or ultrasonic cleaners, preventing the release of metal ions that could degrade battery performance.
NKEYTO Advantage: Laminated Shim Technology and Etching
Our manufacturing process goes beyond simple material selection. We utilize advanced laminated shim technology combined with precision chemical etching to create shims that outperform traditional machined parts.
1. Laminated Shim Technology (Multi-Layer Bonding)
For complex coating profiles or when different material properties are needed in different zones, we bond multiple layers of metal together.
- Leak Prevention: Our lamination process ensures a seamless bond that prevents slurry from seeping between layers (delamination), a common failure point in lower-quality shims.
- Custom Profiles: This allows us to create "step" coatings or specific edge profiles (like edge bead reduction) within a single shim unit, which is essential for high-density battery packing.
2. Stress-Free Durability
Battery coating lines run at high speeds (often exceeding 60-100 meters per minute). The shim is under constant high pressure. Because our chemical etching process is "cold," it introduces no mechanical stress. The shim remains flat and dimensionally stable, ensuring that the battery electrode coating remains uniform from the start of the roll to the end.
Applications in Battery Manufacturing
Our precision spacers are designed to support a wide range of energy storage applications:
- Lithium-Ion Battery Coating Machines: Perfect for both anode (graphite) and cathode (ternary/lithium iron phosphate) coating.
- EV Battery Production: Essential for manufacturing prismatic, cylindrical (e.g., 4680), and pouch cells where consistency is non-negotiable.
- Solid-State Batteries: As the industry moves toward solid electrolytes, our high-precision shims can handle the higher viscosity slurries typical of next-gen batteries.
Technical Specifications
Feature | Detail |
|---|---|
Primary Materials | SUS316, SUS316L, SUS304 (High-Grade Stainless Steel) |
Manufacturing Process | Precision Chemical Etching (Burr-free) |
Technology | Laminated / Multi-layer bonding available |
Tolerance | ±0.005mm to ±0.01mm |
Surface Finish | Polished / Smooth etching to prevent slurry hang-up |
Key Benefit | High corrosion resistance and dimensional stability |
Optimize Your Battery Production Line
Don't let tooling limitations compromise your cell quality. Whether you need a standard replacement or a custom laminated shim for a new battery design, our factory is ready to deliver precision parts that withstand the harsh reality of battery manufacturing.
Contact us for a consultation on material selection and design.
- Company: Shenzhen NKEYTO Precision Hardware Co., Ltd.
- Contact: Luna
- WhatsApp: 12132219094
Questions and Answers
Frequently Asked Questions (FAQ)
Q: Why is SUS316 preferred over SUS304 for battery shims?
A: While both are stainless steels, SUS316 offers superior corrosion resistance, particularly against chlorides and acidic byproducts found in battery electrolytes. This reduces the risk of pitting and metal contamination in the final cell.
Q: How does your laminated shim technology help?
A: Our laminated shim technology allows us to bond different layers of metal to create complex internal geometries or specific coating profiles (like edge reduction) without the risk of layers separating during high-pressure coating.
Q: Can these shims handle high-viscosity slurries?
A: Yes. Our shims are designed with smooth, etched surfaces that facilitate smooth flow even with high-viscosity materials, reducing the "shear thinning" issues often seen with rougher, mechanically cut surfaces.
Q: What is the lifespan of a battery coating shim?
A: Lifespan depends on the slurry abrasiveness, but our SUS316 shims typically last significantly longer than standard steel shims due to their resistance to chemical attack and wear.
Factory Description
We have a full set of etching production equipment and mature processing technology. We can manufacture products in any shape with mesh sizes as small as 0.1mm, according to your requirements.
Our Advantage
Factory Direct Shipping
Our products undergo 100% QC checks before shipment, and we ensure compliance with international standards. If you require specific certifications for your target market, just let us know, and we'll meet those requirements.
Experienced Design and Manufacturing Team
We work closely with customers from the design phase to help avoid potential product flaws, ensuring both the functionality and design meet expectations.
Excellent Supply Chain Management
We can quickly adjust production schedules to meet your urgent deadlines, whether it's for large bulk orders or smaller rush orders.
OEM & ODM Support
We offer the option to print your logo or other customizations.
Strict Quality Control
Our products undergo 100% QC checks before shipment, and we ensure compliance with international standards. If you require specific certifications for your target market, just let us know, and we'll meet those requirements.
Certificate
商标6类
9001
质量认证
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Shenzhen Nkeyto Precision Hardware Co., Ltd. is a factory specializing in precision hardware processing, committed to providing customers with high-quality products and services.We look forward to working with you.
Contact Us
E-mail: luna@nkeyto.com
Tel: +1 213-221-9094
Add: 13th Building, 202, Dawangshan Second Industrial Zone, Dawangshan Community, Shajing Street, Bao'an District, Shenzhen, Guangdong Province
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