Product Categories

Hot Products

Product Details

The Hard Anodized 6061-T6 Aluminum Battery Tray is built for EV applications where surface durability and long-term corrosion resistance are non-negotiable. Unlike standard anodizing, the hard anodized coating creates a dense, wear-resistant surface layer that significantly extends service life under harsh road and environmental conditions. The 6061-T6 alloy substrate delivers the structural backbone — high mechanical strength, excellent weldability, and predictable performance under load.

Hard Anodized 6061-T6 Aluminum Battery Tray

This tray is designed as a drop-in battery housing platform for passenger EVs, commercial fleet vehicles, and off-highway electric equipment. The hard anodized finish provides electrical insulation at the surface level while protecting against salt spray, moisture ingress, and chemical exposure. Every tray is fabricated from extruded profiles, precision-cut and welded, then subjected to the hard anodizing process to achieve a uniform coating thickness typically ranging from 25 to 50 microns depending on specification.

We manufacture this product under strict process control — from billet selection and extrusion die design to post-weld heat treatment and final hard anodizing bath parameters. The result is a battery tray that maintains dimensional stability, resists abrasion during assembly and service, and meets the reliability expectations of global EV OEMs and battery pack integrators.

Features & Benefits

Hard anodized surface: 25–50 μm coating thickness provides superior scratch, wear, and corrosion resistance compared to conventional anodizing.
6061-T6 alloy core: High strength-to-weight ratio with excellent machinability and weldability — the standard for structural EV components.
Electrical surface insulation: The anodic layer acts as a dielectric barrier, reducing risk of electrical shorts in densely packed battery modules.
Salt spray resistant: Proven performance in accelerated corrosion testing, suitable for coastal and high-humidity operating environments.
Robotic-welded joints: Consistent weld quality across production batches, verified by visual and dimensional inspection.
Fully customizable: Tray outline, mounting points, internal dividers, and coating thickness can all be tailored to your pack architecture.

Hard Anodizing Process Specifications

Coating Type	Hard anodic oxidation (Type III per MIL-A-8625)
Coating Thickness	25–50 μm (customizable)
Hardness	Typically 350–500 HV (Vickers)
Color Options	Natural dark gray / Black / Custom dyed
Base Material	6061-T6 aluminum extrusion
Corrosion Resistance	≥336 hours salt spray (ASTM B117, sealed)
Dielectric Strength	Typical 500–800 V/mil (dependent on thickness)

Why 6061-T6 for Battery Trays

6061-T6 is widely specified for EV structural components. The table below compares key properties that matter for battery tray applications.

Property	6061-T6	Benefit for Battery Tray
Tensile Strength	≥290 MPa	Handles crash and vibration loads
Yield Strength	≥240 MPa	Resists permanent deformation
Density	~2.7 g/cm³	Lightweight contribution to EV range
Weldability	Excellent (TIG/MIG)	Reliable multi-piece tray assembly
Corrosion Resistance	Good (base) / Excellent (anodized)	Long service life in wet environments

Customization Process

From initial concept to serial production, our structured process ensures your hard anodized 6061-T6 battery tray meets every specification.

Requirement Review: Share your 2D/3D drawings, desired dimensions, mounting points, and hard anodizing thickness. Our engineering team evaluates manufacturability within 2 working days.
Extrusion Die Development: A dedicated die is designed and fabricated for your profile. With 500,000+ in-stock molds, we often adapt existing profiles to reduce lead time.
Sample Extrusion & Fabrication: 6061-T6 billets are extruded, cut, machined, and welded per your design. A first-article sample is prepared for dimensional verification.
Hard Anodizing Trial: The sample undergoes Type III anodizing. Coating thickness, hardness, and salt spray test coupons are produced for your approval.
Client Approval & Pilot Run: Once the sample is signed off, we run a small pilot batch to validate process stability and repeatability.
Mass Production & Quality Inspection: Full production proceeds with in-line inspection. Every tray is checked for critical dimensions, anodizing thickness, and visual defects before packing.
Packaging & Global Delivery: Trays are packed per your specification — individual wrapping, custom pallets, and labeled for easy identification. We ship from 5 dedicated container loading platforms.

Shengxin Certifications

Hard Anodizing vs. Powder Coating: Which Finish Is Right for Your Battery Tray?

While both finishes protect aluminum, their performance profiles differ significantly in EV battery tray applications. The table below highlights the key differences to help inform your specification.

Feature	Hard Anodizing (Type III)	Powder Coating
Surface Hardness	350–500 HV	Variable, generally lower
Corrosion Resistance	Excellent (≥336h salt spray, sealed)	Good, depends on film integrity
Electrical Insulation	Excellent dielectric properties	Insulating, but can be thicker/heavier
Coating Thickness	25–50 μm (predictable growth)	60–120 μm typical
Dimensional Impact	Controlled, factored into machining	Edge build-up may affect fit
Color Options	Limited (dark gray, black, some dye)	Full RAL palette
Typical Use Case	Structural trays, high-wear, exposed	Cosmetic covers, interior brackets

In many EV battery pack designs, hard anodizing is specified for the main structural tray due to its thin, hard, and electrically insulating surface. Powder coating is often reserved for non-structural covers or appearance parts. Our team can help you evaluate the best option — or a combination — for your project.

Hard Anodized Battery Tray FAQ

Q: What is the difference between regular anodizing and hard anodizing?

A: Regular anodizing (Type II) typically produces a 5–15 μm coating focused on appearance and basic corrosion protection. Hard anodizing (Type III) builds a 25–50 μm or thicker layer with significantly higher surface hardness (350–500 HV) and wear resistance, making it suitable for structural parts exposed to mechanical stress and harsh environments.

Q: Does hard anodizing affect the dimensional accuracy of the battery tray?

A: The coating builds partially into and partially onto the surface. We account for this growth in our machining process — critical mounting features are machined to final dimensions with the coating thickness factored in, ensuring post-anodizing fit-up remains within tolerance.

Q: Can hard anodized trays be welded after coating?

A: No. Welding is performed before hard anodizing. The anodic layer is non-conductive and will be destroyed by welding heat. Our process sequence is: extrusion → fabrication and welding → final anodizing.

Q: Is 6061-T6 the best alloy for a battery tray?

A: 6061-T6 offers an excellent balance of strength, weldability, and anodizing response, which is why it's a widely adopted choice. Depending on your specific requirements, we can also produce trays in 6005A or 6063 alloys, and our engineering team can advise on the optimal selection.

Q: What quality checks do you perform on the hard anodized finish?

A: We verify coating thickness via eddy current testing, check surface hardness, and perform salt spray testing per ASTM B117 on sample coupons from each production batch. Full inspection reports are available upon request.

← Back to Aluminum Battery Trays product category

Hot Tags: Hard Anodized Aluminum Battery Tray 6061-T6 Battery Tray Anodized EV Battery Tray Corrosion Resistant Battery Tray Aluminum Battery Tray Hard Coat 6061 Aluminum EV Battery Enclosure

Leave A Message

You can contact us any way that is convenient for you. Shengxin Provide Services 24/7 via fax, email or telephone.

Subject : Hard Anodized 6061-T6 Aluminum Battery Tray