EV Battery Pouch Cell Aluminum Case
Products Description
The EV Battery Pouch Cell Aluminum Case is primarily made of high-performance aluminum alloy, manufactured through deep drawing, precision stamping, CNC machining, and surface treatment processes. It is suitable for the square casing structure in lithium-ion battery systems.
The product is commonly used in:
Square lithium-ion battery casings
Power battery aluminum casings
Energy storage battery casings
Cell protection casings
Battery module structural components
High-voltage new energy battery modules
Its structural design emphasizes:
Lightweight
High strength
High corrosion resistance
Good sealing
Thermal stability
Long cycle life
Superior Product Properties and Core Functional Features
Ultra-lightweight structure
With a density only 1/3 that of steel, the aluminum battery casing significantly improves the overall energy density (Wh/kg) of the battery pack, contributing to longer driving ranges in new energy vehicles.
Excellent resistance to internal pressure expansion
A unique material formula and optimized wall thickness design ensure that the Battery Shell maintains geometric stability even during long-term charging and discharging, expansion, and gas evolution of the battery cells, preventing deformation of the separator.
Insulation and electrochemical inertness
The inner wall undergoes a specific process, resulting in excellent dielectric strength, preventing side reactions or electrochemical breakdown between the casing and the electrolyte.
Detailed Showcase: From Stamped Parts to Finished Housing
Roll to Sheet
After precision slitting, aluminum coils are stamped into sheets according to the unfolded dimensions of the housing, with edge burrs controlled to the micron level.
01
Multi-Station Stretching
The sheets are progressively formed through 4-6 stamping stations, with the stamping depth and stretching rate of each process optimized through CAE simulation.
02
Wall Thickness Reduction
The thinning and stretching process precisely controls the sidewall thickness to ensure consistency.
03
Bottom Forming
The bottom R-corner transition area is specially molded to avoid stress concentration.
04
Port Trimming
Edge trimming and deburring of the top port of the housing ensure a precise seal with the cover plate.
05
Main Functions: Systemic Value Beyond Physical Containment
| Absolute Sealing and Gas Barrier | The aluminum alloy body possesses a near-zero water vapor transmission rate (WVTR) and oxygen transmission rate (OTR), fundamentally preventing the intrusion of external moisture and oxygen, ensuring the long-term chemical stability of the internal electrodes and electrolyte of the battery cell. |
| Structural Load-Bearing and Compression Resistance | In vehicle collisions or undercarriage impacts, the Rechargeable Aluminum Shell serves as the first line of defense against external mechanical intrusion. Its high-strength anisotropic shell can absorb a large amount of impact energy, preventing the battery cell from suffering mechanical abuse that could lead to internal short circuits and fires. |
| Firewall and Thermal Interception Function | Aluminum alloy has excellent endothermic melting characteristics at high temperatures. When a single battery cell experiences thermal runaway, the dense Lithium-ion Battery Aluminum Shell can slow the spread of high-temperature gases and flames to adjacent cells, buying valuable power-off and warning time for the BMS system. |
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We not only provide standardized Prismatic Cell Aluminum Battery Case products, but also offer integrated engineering support based on customers' battery structure, PACK system, and automated assembly requirements. This support ranges from material selection and structural optimization to mold development and mass production, helping new energy projects achieve more efficient and stable mass production.
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