EV Battery Aluminum Casing
This EV Battery Aluminum Casing is specifically designed for BEVs, PHEVs, and ESS applications, utilizing high-purity 3003/5052 aluminum alloys and a precision continuous deep-drawing process. The casing features micron-level wall thickness tolerances, a seamless leak-proof design, and excellent resistance to electrolyte corrosion, while integrating a high-precision explosion-proof valve for accurate pressure relief. We provide automotive-grade quality control and in-depth OEM/ODM engineering customization to ensure structural rigidity and superior thermal management safety.
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Product Introduction
What is an EV battery aluminum casing?
An EV battery aluminum casing is primarily manufactured from high-purity, modified aluminum-manganese or aluminum-magnesium alloys, formed in a single operation using a large-scale, continuous, multi-stage precision deep-drawing process. The assembly consists of a seamless, integrated aluminum base and a high-precision laser-welded aluminum top cover, collectively forming a physical enclosure characterized by exceptional airtightness, high structural strength, and superior heat dissipation capabilities.
Material Advantages of Prismatic Aluminum Power Battery Casings
Specialized High-Quality Aluminum-Manganese Alloy
Engineered for the aluminum alloy prismatic battery case, this material features excellent deep-draw formability and superior corrosion resistance, meeting strict deep-drawing and high explosion-proof performance requirements.
Lightweight Design and High Specific Strength
For a given level of casing rigidity and compressive strength, the prismatic cell aluminum battery case significantly reduces the dead weight of individual battery cells, directly contributing to increased energy density for the entire vehicle.
Chemical Stability and Resistance to Electrolyte Corrosion
Aluminum surfaces rapidly form a dense protective oxide layer upon exposure to air; combined with electrophoretic coating or passivation treatments, this provides resistance against corrosion in harsh automotive environments characterized by high salt spray, humidity, and heat.
Manufacturing Process for Aluminum Battery Housings
Precision Progressive Multi-Station Stamping Dies
The dies utilize imported high-hardness tungsten steel and specialized surface coatings, ensuring no galling or scratching occurs even during millions of high-frequency deep-drawing cycles.
Ultrasonic Degreasing and Trace-Free Cleaning Process
A multi-stage ultrasonic aqueous cleaning system combined with vacuum drying technology ensures the inner walls of delivered products meet automotive-grade cleanliness standards-free from oil, debris, and moisture.
Design Optimized for Precision Laser Welding
Exceptional dimensional consistency enables automated laser welding heads to achieve deep-penetration welds at very high linear speeds, resulting in dense, porosity-free weld seams.
Advantages of Lithium Batteries Square Aluminum Shell
Battery Electric Vehicles (BEV) and Plug-in Hybrid Electric Vehicles (PHEV)
Casings for large-capacity prismatic power battery cells used in passenger vehicles (e.g., 50Ah, 100Ah, 280Ah, and 314Ah specifications).
Commercial Vehicles and Electric Buses/Trucks
Heavy-duty power battery packs requiring high cycle life and superior vibration resistance.
Electrochemical Energy Storage Systems (ESS)
Containerized energy storage battery clusters, aluminum casings for residential energy storage cells, and commercial & industrial energy storage units.
Frequently Asked Questions for Battery Aluminum Housing
Can you supply the aluminum casing as a complete assembly integrated with a custom explosion-proof top cover?
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Absolutely. We not only supply the precision aluminum casing itself but also possess extensive expertise in top cover assembly and welding integration (including explosion-proof valves, terminal injection molding, and flexible connectors). We offer a "casing + cover" system kit solution, ensuring optimal fit and dimensional precision for laser welding.
What is the tooling lead time for newly developed, non-standard battery cell sizes?
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We operate an in-house precision tooling R&D and machining center. For brand-new, custom-sized aluminum casings, the design of stamping dies and the delivery of initial prototypes typically take just 10 to 15 days.
How do you prevent oxidation, dents, and scratches during the transport and storage of the aluminum casings?
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Every casing is packaged in a cleanroom environment. We use anti-static blister trays for organized separation, combined with vacuum-sealed, oxygen-absorbing, and moisture-proof bags, as well as high-strength export-grade wooden crates. This ensures the products remain free from oxidation, impact damage, and deformation during sea freight and long-term storage.
Which automotive-grade quality standards do your products meet?
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Our manufacturing facilities are fully certified to the IATF 16949 automotive quality management system and ISO 14001 environmental management system standards. We provide comprehensive spectral analysis reports for all materials, and our products fully comply with international environmental regulations such as RoHS and REACH.
Contact Us
Leveraging exceptional mold precision, rigorous cleanliness controls, and robust DFM engineering capabilities, we are dedicated to providing global new energy customers with highly consistent, zero-defect battery packs with aluminum housing solutions. - Please feel free to contact our engineering team for technical assessments and sample support.
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