3003-H14 Aluminum Case
Products Description
The 3003-H14 Aluminum Case for square lithium batteries is made of high-quality 3003-H14 rust-resistant aluminum alloy. Manufactured through precision stamping, CNC machining, and automated welding processes, it boasts lightweight construction, high ductility, excellent airtightness, and corrosion resistance, providing reliable protection and long-term support for square lithium batteries.

Material Advantages: Core Characteristics of 3003-H14 Aluminum Alloy
3003-H14 is a typical rust-resistant aluminum alloy, widely used in the manufacture of new energy battery casings due to its excellent corrosion resistance, good formability, and high strength stability. Compared to traditional 5052 or 1060 aluminum alloys, 3003-H14 is more suitable for applications that balance mechanical strength and weldability.
Material Characteristics and Advantages:
Strong Corrosion Resistance: Contains Mn, effectively resisting oxidation reactions in electrolytes, moisture, and temperature differences;
Lightweight Design: Low density and high strength, contributing to overall weight reduction and increased energy density;
Excellent Formability: Suitable for deep drawing, bending, and multi-stage forming processes, ensuring a stable and crack-free casing structure.
Good Thermal Conductivity: Effectively disperses internal battery heat, improving heat dissipation and safety performance;
Easy Welding: Compatible with various welding methods (TIG/MIG/laser welding), producing smooth welds without porosity.

Manufacturing Advantages: High-Precision Production and Strict Process Control
Automated Stamping and CNC Precision Machining
High-speed stamping and multi-axis CNC machining technology ensure that dimensional accuracy tolerances are controlled within ±0.05mm. The bottom cover, casing, and interface areas are integrally formed, resulting in a high degree of structural flatness and preventing assembly deviations later.
Cleanroom Welding and Surface Treatment
Automated laser welding and argon arc welding processes guarantee airtightness, sealing integrity, and weld strength. The surface undergoes anodizing or anti-fingerprint electrolytic treatment to effectively prevent corrosion and scratches.
Precision Inspection and Sealing Testing
The entire process involves airtightness testing, torque testing, weld X-ray inspection, and surface stress testing to ensure that each Lithium Battery Aluminum Case meets high-level sealing standards before assembly.
Mold and Customization Capabilities
Our own mold center can perform customized production based on customer drawings or 3D files, meeting diverse design requirements such as different sizes, opening positions, and electrical connection interfaces, supporting both small-batch trial production and large-scale mass production.

Application Advantages: Versatile Applications and Long Lifespan
New Energy Vehicle Power Battery Modules
Battery Aluminum Cases provide high-strength support and good thermal conductivity, ensuring battery safety and stable performance.
01
Energy Storage Systems (ESS)
Remains undeformed and corrosion-free during long-term operation in outdoor, high-humidity, or high-temperature environments;
02
Portable Energy Storage Power Supplies
Rechargeable Aluminum Shell achieves a lightweight design and long-term protection, combining drop resistance and aesthetics.
03
Industrial Equipment and UPS Battery Modules
Aluminum Battery Casing Meets the structural protection requirements of high-current, high-load environments.
04
Electric Motorcycle, Power Tool, and Communication Base Station Battery Packs
Compatible with various cell structures, ensuring stable packaging and flexible assembly.
05

FAQ
Why is 3003-H14 aluminum used for battery cases?
3003-H14 aluminum provides stable deep drawing performance, corrosion resistance, and suitable structural rigidity for lithium battery enclosure manufacturing.
Is the battery case suitable for laser welding?
Yes. The sealing edge structure is designed for battery cover laser welding applications.
Can the aluminum battery case dimensions be customized?
Yes. Length, width, height, wall thickness, terminal openings, and sealing structures can all be customized according to battery cell requirements.
What inspection methods are used during production?
Production includes CCD online inspection, dimensional testing, flatness verification, and wall thickness sampling.
Which industries commonly use this aluminum battery housing?
The product is commonly used in EV batteries, energy storage systems, industrial lithium battery packs, and telecom backup power applications.
contact us
Our 3003-H14 aluminum case program is built on metallurgical traceability, forming process control, and dimensional discipline that eliminate the lot-to-lot variation responsible for module assembly delays and field failures. If your prismatic cell program requires a casing partner who understands that the shell is an active structural and thermal component-not merely a box-share your drawing package or cell format requirements, and our engineering team will respond with a manufacturability assessment and qualification timeline within 48 hours.
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