Cell Lithium Battery Aluminum Shell
Products Description
This series of Cell Lithium Battery Aluminum shells is a core component of new energy batteries. Its core function is to provide a sealed protective space for the lithium battery cells, while also undertaking crucial roles in support, heat dissipation, and impact resistance, ensuring the safe and stable operation of the battery throughout its entire lifecycle. Unlike general-purpose metal casings, its core advantage lies in its precise matching of aluminum alloy grades to different lithium battery application scenarios, achieving deep adaptation in terms of "material-design-operating conditions"-from the lightweight requirements of consumer lithium batteries to the high-strength impact resistance requirements of power lithium batteries, and the long-term corrosion resistance requirements of energy storage lithium batteries, customized solutions can be provided.
Key product features precisely match professional-grade needs: Utilizing highly adaptable aluminum alloy material, balancing lightweight and structural strength; an integrated sealed design effectively blocks the intrusion of external impurities such as moisture and dust, preventing electrolyte leakage; a customized heat dissipation structure adapts to the heat dissipation needs of batteries with different power ratings.
Core Materials: Full-Spectrum Compatible Aluminum Alloy Grades
Focusing on the core requirements of Aluminum shell for lithium iron phosphate prismatic cells, we have carefully selected four categories of high-performance aluminum alloy grades to form a material system covering all scenarios:
① 3003-H14 Aluminum Alloy: As one of the core grades in this series, it belongs to the aluminum-manganese alloy category and possesses excellent corrosion resistance and formability. After H14 heat treatment, its strength and hardness are significantly improved while retaining good toughness. Its core advantage lies in its strong resistance to stress corrosion, making it suitable for long-term outdoor service scenarios and the preferred material for energy storage lithium battery casings.
② AL1060 Aluminum Alloy: A high-purity aluminum material with a purity of over 99.6%, it possesses excellent thermal conductivity and ductility, is easy to process and form, and can achieve precision machining of complex structures. Its lightweight characteristics are outstanding, making it suitable for consumer lithium batteries that are sensitive to weight and have high heat dissipation requirements, such as laptop and drone batteries.
③ AL3003 aluminum alloy: Belonging to the aluminum-manganese alloy series like 3003-H14, it has excellent basic properties, outstanding corrosion resistance and weldability, balanced mechanical properties, and relatively controllable processing costs. It is suitable for mid-to-low-end energy storage batteries and small power lithium battery casings with high cost-effectiveness requirements, and has wide versatility.
④ AL5052 aluminum alloy: An aluminum-magnesium alloy, the addition of magnesium gives it extremely high strength and toughness, excellent fatigue resistance, and outstanding resistance to marine atmospheric corrosion. It is suitable for power lithium batteries and large energy storage battery casings in harsh environments, such as new energy vehicle power batteries and marine energy storage equipment.
⑤ AL6061 aluminum alloy: An aluminum-magnesium-silicon alloy, whose strength can be greatly improved through heat treatment. It has excellent mechanical and processing properties, strong impact resistance, and good thermal conductivity. It is suitable for high-end power lithium power cell Aluminum shells with high requirements for structural strength and heat dissipation, such as new energy commercial vehicle batteries and heavy-duty electric equipment batteries.
Design Advantages and Detail Showcase: The Devil is in the Details
Stress-Relief Rounded Corner Design
We've designed scientifically sound and smooth rounded corners at the four bottom corners of the Aluminum shell for the lithium polymer battery cell and at the opening corners. This is not only for aesthetics but also to disperse stress concentration. When the battery is subjected to drops or vibrations, the rounded corner design effectively absorbs impact energy, preventing the casing from breaking due to brittle fracture.
Opening Flatness and Perpendicularity Control
The casing opening is a critical area for laser welding to the cover plate. We use high-precision forming molds to ensure extremely high opening flatness and strict perpendicularity to the Aluminum shell for lithium-ion prismatic cell sidewalls. This geometric precision ensures that the laser beam can be precisely focused during laser welding, forming a weld with moderate penetration and a perfect appearance, minimizing the risk of incomplete welds or burn-through.
Burry-Free Processing
Burrs are a major enemy of battery safety. We employ precision molds and a regular maintenance mechanism in our punching and trimming processes to ensure that there are no visible or microscopic metal burrs on the edges and punched surfaces of the housing. This not only protects the safety of operators but, more importantly, prevents short circuits caused by burrs piercing the insulation film.
Optional Surface Insulation Coating
Depending on the module integration requirements, we can provide insulation treatment solutions for the housing surface. Through spraying or electrophoresis, a uniform, dense, and highly adhesive insulation layer is formed on the outer surface of the prismatic lfp cells Aluminum shell. This coating is not only resistant to high-voltage breakdown but also has good thermal conductivity, eliminating the cumbersome additional film application process during module assembly and improving production efficiency.
Quality Commitment and Supply Chain Assurance
As a professional supplier serving the international market, we deeply understand that the core of B2B procurement lies in "predictability" and "reliability." Our factory has passed IATF 16949 automotive industry quality management system certification, and every step, from raw material intake to finished product delivery, has strict traceability records.
Raw Material Source Control: We only cooperate with top global aluminum giants, and each batch of materials comes with a Material Certificate (MTC) to ensure the purity and lack of impurities in the alloy composition.
Combined Full Inspection and Sampling Inspection: Utilizing high-precision image measuring instruments, coordinate measuring machines, tensile testing machines, and airtightness testing instruments, we conduct 100% or Statistical Process Control (SPC) monitoring of the dimensional accuracy, sealing performance, and crush strength of our products.
Customized Engineering Services: In addition to standard-sized products, our engineering team can assist with mold development and material selection recommendations based on customers' specific cell design requirements, helping customers shorten lithium prismatic battery Aluminum shell development cycles and quickly seize market share.
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