Lithium Iron Cell Aluminum Case
The Lithium Iron Cell Aluminum Case is an aluminum alloy housing designed for prismatic lithium iron phosphate (LiFePO₄/LFP) cells. It serves critical functions such as providing structural protection, spatial containment, thermal conduction, and sealing support for the internal electrode sheets, electrolyte, and other functional components. Unlike cylindrical cells, prismatic cells utilize a rectangular layout, imposing stricter requirements regarding dimensional consistency, corner forming quality, wall thickness uniformity, opening flatness, and compatibility with subsequent sealing processes. Far from being a simple metal container, the aluminum alloy case is a functional component that plays an integral role in the structural design of the cell itself.
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Product Introduction
The aluminum battery cell casing is not merely a mechanical metal container; it is a critical structural component that directly contributes to protecting the internal electrochemical environment and establishing a safety barrier.
Seamless Deep-Drawn Structure: The casing is formed in a single step using a high-precision continuous deep-drawing process; the absence of seams or welds at the bottom corners and sidewalls physically eliminates the risk of leakage.
Excellent Electrochemical Compatibility and Corrosion Resistance: Manufactured from high-purity, electrical-grade aluminum alloy with passivated and ultra-clean inner surfaces, the casing offers superior resistance to chemical corrosion and electrochemical erosion caused by highly reactive electrolytes.
Precision Dimensional Tolerance Control: Designed for large prismatic cells (100Ah–300Ah+), the wall thickness uniformity is controlled at the micron level, ensuring an excellent fit and optimal heat transfer efficiency when the cells are assembled into packs or modules.
Integrated Safety Lid Module: A fully integrated, high-sealing top cover assembly is available, incorporating a safety vent, terminals, an electrolyte injection port, and an insulating gasket.
Aluminum shell for lithium iron phosphate prismatic cells Manufacturing Advantages: Integrating Every Variable into the System
In-house Mold Development
Deep-drawing molds are critical to the quality of aluminum casings. We handle mold design, maintenance, and repair internally, enabling short iteration cycles for mold trials and rapid responses to customer design changes.
Stamping Lines and Cycle Time Management
Multi-station progressive drawing lines with automatic feeding systems balance mass-production consistency with the flexibility to schedule small-batch runs.
Full-Dimensional Inspection Capabilities
Equipped with tools for profile measurement, coating thickness analysis, and geometric tolerance checks, we employ a "full-dimensional inspection of the first article plus random patrol inspections" protocol, with data on key characteristics logged for full traceability.
Culture of Batch Consistency
We adhere to strict protocols-locking in the specific mold, aluminum batch, and process window-to minimize machine adjustment costs for customers during material changeovers on their production lines.
Key Features and Application Advantages for lithium power cell Aluminum shell
Energy Storage Systems
Prismatic aluminum-cased cells are widely used in large-scale energy storage. The thermal conductivity of the aluminum casing facilitates module-level thermal management design, while its lightweight nature reduces the system's overall weight and installation costs.
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Industrial Power and Specialty Vehicles
In scenarios requiring high structural strength and vibration resistance, the aluminum casing-through optimized structural design-provides sufficient mechanical support while maintaining high energy density.
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Telecom Backup Power and UPS
Under conditions involving long periods of inactivity and cycling, sealing reliability and corrosion resistance directly impact cell lifespan. A stable casing surface and high-precision sealing interfaces are key to ensuring performance.
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Customized Equipment
Certain industrial equipment or specialized power supplies require non-standard cell dimensions; the customizability of aluminum casings allows for rapid adaptation to specific spatial constraints and interface requirements.
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Frequently Asked Questions for prismatic LFP cells Aluminum shell
Q1: Can you manufacture non-standard sizes based on our drawings?
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A: Yes. We can create new molds based on customer specifications regarding dimensions (L/W/H), opening structure, corner radii, and wall thickness. We recommend discussing manufacturability-such as deep-drawing stages and draft angles-during the initial drawing phase to optimize the design and reduce mold trial time.
Q2: Can the housing and top cover be supplied as a set?
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A: Yes, we support the bundled delivery of housings, top covers, and related hardware. Unified sourcing helps control fit tolerances and welding consistency while reducing the number of suppliers and incoming inspection costs.
Q3: How is the cleanliness of the inner wall ensured? Are there inspection standards?
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A: Our production process includes deburring, multi-stage cleaning, ultrasonic-assisted cleaning, and drying steps, followed by spot checks for appearance and particulate levels before packaging. Specific cleanliness criteria and limits can be defined in the technical agreement, and inspection records can be provided upon request.
Q4: What method is used for airtightness testing? Can a report be provided?
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A: We typically use the pressure decay method or water immersion test to detect leaks, with parameters set according to product specifications. Airtightness inspection records are available for shipment batches; third-party or specialized testing requirements can be confirmed during the inquiry stage.
Q5: What are the typical lead times for samples and mass production?
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A: The sample lead time depends on mold development progress and is usually completed within a few weeks of drawing confirmation; mass production lead times depend on specifications and scheduling. Since aluminum housings do not require certification related to battery cell chemistry, the introduction process is generally faster than that for complete cells, making them ideal components to lock in during the early stages of a new project.
contact us
If you already possess 2D/3D drawings or are currently developing new LFP prismatic cells, you can submit your design specifications directly to the Apollo engineering team. We will provide OEM engineering support covering materials, deep-drawing forming, dimensional control, and downstream packaging integration.
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