Usage, Function, and Applicable Scenarios of Square Aluminum Shell Cell Assembly Line
hit：55 date：2026-07-17
Explanation of the purpose, function, and applicable scenarios of square aluminum shell battery cell assembly line
1、 Overall core role
The assembly line for square aluminum shell battery cells is divided into two categories: the front-end battery cell packaging assembly line (where the battery factory produces single aluminum shell battery cells) and the back-end module PACK assembly line (where they are assembled into battery modules/packs). As a whole, it is an automated batch production line for square aluminum shell lithium batteries, completing cell forming, sealing, stringing, welding, and full inspection, and producing power batteries and energy storage battery units that can be directly loaded onto vehicles or used for energy storage. ACK assembly line
2、 First type: Front section single square aluminum shell battery cell assembly line (middle section production line of battery cell factory)
Core Purpose
After the completion of winding/stacking, the bare cells are automatically packaged into an aluminum alloy square shell to produce finished single square aluminum shell cells (280Ah/314Ah/587Ah power and energy storage monomers).
Complete process and work content
Bare cell hot pressing and X-ray inspection (detecting electrode misalignment and short circuit hazards)
Ultrasonic welding of pole ears, adapter plates, and top cover poles
Package Mylar insulation film (to prevent short circuit between the battery cell and the inner wall of the aluminum shell)
Automatic aluminum shell insertion, flattening positioning, top cover pre fixation
Laser sealing welding of top cover and aluminum shell mouth (core sealing process)
One helium leak detection (detecting liquid and gas leakage in welds), electrolyte injection, and static formation
Sealing nail laser sealing welding, secondary helium inspection, short circuit/insulation withstand voltage full inspection
Cell coding, OCV voltage internal resistance sorting, automatic removal of defective products
Produce products
Single square aluminum shell lithium battery cell, supplied to PACK factory assembly module.
3、 Second type: Rear section square aluminum shell module PACK assembly line (energy storage/vehicle assembly line)
Core Purpose
Assemble qualified single aluminum shell battery cells into battery modules and complete battery PACK packages in multiple strings and rows, suitable for power supply in new energy vehicles and energy storage power stations.
Complete process and work content
Automatic feeding of battery cells, scanning for traceability, OCV/IR internal resistance sorting and grouping (ensuring battery cell consistency)
Shell cleaning, pole plasma cleaning, and applying thermal insulation adhesive to the side of the battery cell
Thermal insulation pads, automatic feeding of end plates, and precise stacking of battery cell groups by robots
Servo constant pressure extrusion shaping, automatic bundling and locking module
Busbar installation, laser welding pole conductive connection
CCD visual inspection of weld beads, polarity anti reverse detection, insulation withstand voltage testing
FPC collection harness assembly, EOL comprehensive electrical performance testing (capacity, voltage difference, insulation)
Module entry into PACK box, sealing with glue, and overall offline caching
4、 Suitable for production products (applicable industries)
New energy vehicles: passenger cars, commercial vehicles, heavy-duty truck power battery modules/battery packs
Energy storage field: household energy storage, industrial and commercial energy storage, power grid energy storage, large capacity aluminum shell battery cells (314Ah, 587Ah single unit)
Special equipment: construction machinery, electric ships, low-speed electric vehicles, lithium batteries in battery swapping cabinets
Industrial power supply: large uninterruptible power supply (UPS), photovoltaic energy storage battery system
5、 Core value of the entire assembly line (why use this assembly line)
Fully automatic with minimal manual labor
Robots, double speed chains, and multi station linkage replace a large amount of manual handling, welding, and inspection, reducing labor costs.
Significant improvement in product consistency and safety
Visual positioning, constant voltage welding, and full process online inspection to eliminate virtual welding, short circuits, and solder leaks; The battery cells are sorted and paired uniformly, resulting in a small pressure difference and longer cycle life for the entire group.
Sealing and reliability assurance
Laser sealing and dual channel helium detection completely solve the safety hazards of liquid leakage and gas expansion in aluminum shell cells; The module is coated with glue to enhance heat dissipation, waterproofing, and earthquake resistance.
Full process data traceability
Docking with MES system, automatic storage of parameters for each battery cell and each process, precise positioning of processes in case of defects, facilitating quality control.
Flexible and compatible with multiple specifications
Quickly switch between square aluminum shell cells of different thicknesses and capacities, with one line capable of producing multiple models for both power and energy storage.
