Aluminum Case For Motor Replacement Lead Acid Battery Pack
Products Description
The Aluminum Case for Motor Replacement Lead Acid Battery Pack of a square lithium battery not only provides mechanical protection for the battery cell but also plays a crucial role in thermal management, safety isolation, structural fixation, and system integration.
The product typically consists of the following structures:
Aluminum Battery Housing
Top Cover
Bottom Shell
Sealing Area
Mounting Structure
Heat Dissipation Surface
Internal Reinforcement
Depending on project requirements, the following options are available:
Deep-drawn unibody molding
Welded assembly structure
CNC precision machining structure
Thin-walled lightweight structure
High-strength reinforced structure
Compatible with lithium battery systems of various capacities and sizes.
Design Advantages: Comprehensive Engineering Design for System-Level Integration
| Dynamic Stress and Deformation Control Design | During charge-discharge cycles, the internal cells of a square lithium battery inevitably undergo micro-expansion due to chemical reactions. Our lithium prismatic cells' aluminum shell design incorporates pre-stress compensation and gradual wall thickness technology. Reinforcing ribs or optimized radius corners are used on key stress concentration surfaces of the casing to ensure that the casing deformation remains within strict engineering tolerances after thousands of cycles, preventing compression of adjacent cells. |
| Precision Cap/Lid and Accessory Matching Design | We provide an integrated engineering design for the aluminum case of the Li-ion Electric Bike Battery Pack and cap, with pre-reserved locations for the safety vent, positive and negative terminal holes, BMS sampling harness slots, and thermistor mounting positions. The clearance between the cap and casing is controlled within 0.03-0.05 mm, providing a perfect assembly benchmark for subsequent automated laser welding for our customers. |
| The inner wall of the thermal management insulated integrated housing | can be insulated according to customer requirements through anodizing, thermal spraying, or insulating coating processes, with a breakdown voltage of up to several kilovolts, ensuring electrical insulation safety inside the extreme high-voltage series pack. |
Key Functions and Product Advantages: Core Strength Empowering Terminals
Zero Maintenance Throughout the Lifecycle
The naturally formed dense alumina film on the aluminum alloy surface gives the LFP prismatic cells an inherent corrosion resistance, eliminating the need for regular rust prevention treatments like lead-acid battery casings, thus reducing the overall maintenance costs throughout the device's lifecycle.
Lightweight and High-Strength Balance
Compared to traditional steel casings or thick-walled plastic parts, the aluminum alloy casing reduces weight by 40% while providing higher specific strength, directly improving the device's range and operational performance after motor replacement.
Physical Firewall Against Thermal Runaway
Aluminum alloy only softens and melts at temperatures above 600℃, far exceeding the deformation temperature of plastic casings. In the early stages of thermal runaway in the battery cell, the aluminum casing efficiently dissipates heat, slowing its spread and, in extreme cases, constraining the direction of the explosion, buying valuable time for personnel and equipment to respond.
In-depth Analysis of Material Advantages
3003-H14 aluminum alloy, as the primary material, boasts excellent corrosion resistance and good deep-drawing capabilities, performing exceptionally well in industrial environments characterized by humidity, salt spray, or significant temperature variations. Its manganese alloying provides a better balance between strength and plasticity, mitigating the risk of cracking due to long-term vibration.
AL1060: A pure aluminum material with high thermal conductivity, particularly suitable for high-power motor replacement applications with stringent heat dissipation requirements. It effectively reduces the core temperature of the battery pack, extending cell cycle life.
AL5052: Magnesium alloying provides higher fatigue strength and corrosion resistance, suitable for mobile devices subjected to long-term outdoor exposure or frequent handling.
AL6061: Can achieve higher hardness and rigidity through T6 heat treatment, suitable for heavy-duty mechanical battery pack applications requiring structural loads.
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We not only provide standardized lithium iron cell Aluminum shell products, but also offer integrated engineering support, from material selection and structural optimization to mass production, tailored to customers' PACK structure, installation space, thermal management solutions, and mass production needs. This helps new energy projects achieve more stable and efficient product implementation.
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