How lithium polymer batteries are made

Our Shenzhen and factory offices bring customer communication, engineering coordination, and production support together in one connected team.

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A clean, controlled production floor keeps equipment, workstations, and materials organized to support stable cell assembly.

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Active materials are processed into precise electrode sheets, creating the consistent foundation for every cell that follows.

1

Slurry Mixing

Active materials, conductive agents, and binders are dispersed under controlled conditions to produce a uniform, stable coating slurry.

2

Cathode Precision Coating

Cathode slurry is applied evenly to aluminium foil while coating weight and thickness are monitored online for consistent electrode capacity.

3

Anode Coating & Forming

Graphite-based anode slurry is coated on copper foil, dried, and compacted to create a stable electrode sheet for reliable cycling.

4

Cathode Calendering

Precision rolls control cathode density and thickness, improving adhesion, pore structure, and energy density.

5

Anode Calendering

The anode sheet is compacted evenly to stabilize thickness and surface flatness for accurate downstream assembly.

6

Cathode Slitting

Automated slitting cuts wide cathode sheets to specification while tightly controlling burrs and edge quality.

7

Anode Slitting

Anode sheets are precision-slit and rewound in a clean environment to protect cell safety and consistency.

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Prepared electrodes are wound, dried, enclosed, filled, and sealed in a controlled environment to form the cell.

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Cell Winding

Cathode, separator, and anode layers are accurately wound with real-time tension and alignment control to form a stable cell core.

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Vacuum Drying

Vacuum ovens remove residual moisture to ppm-level control, reducing electrolyte side reactions and supporting safe, long-life cells.

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Pouch Shell Forming

Aluminium-plastic laminate is stamped into accurately sized pouch shells with clean edges for dependable cell enclosure.

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Electrolyte Filling

Electrolyte is filled under low-humidity control at a precise volume so the cell is fully wetted and performs consistently.

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Secondary Sealing

Cutting, folding, and heat sealing complete the final pouch enclosure, isolating the cell from moisture and air.

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Newly sealed cells are activated, inspected, and graded so that only consistent cells move to the next stage.

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Formation & Activation

The first controlled charge and discharge forms a stable SEI layer; thermal formation activates the cell for cycle life and safety.

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Cell Inspection

Post-formation cells undergo OCV, internal-resistance, and appearance inspection to remove nonconforming units.

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Capacity Grading

Multi-channel charge/discharge equipment grades capacity and performance, enabling tightly matched cells for PACK assembly.

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Qualified cells are identified, protected, and stored by batch and model to preserve traceability through shipment.

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Finished Cell Packaging

Qualified cells are marked, labeled, and packed on a traceable line for safe, standardized delivery from the factory.

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Cell Warehouse

Cells are stored by batch and model under controlled conditions with FIFO and inventory traceability management.

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Cells become complete battery systems, supported by reliability validation and samples for engineering and customer development.

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Battery PACK Assembly

Cells are connected in series and parallel with BMS integration, mechanical assembly, and harness connections for the required battery system.

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Safety & Reliability Lab

Cell and PACK products are validated with safety tests such as combustion, drop, temperature cycling, short-circuit, and crush testing.

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Sample Center

Battery samples and test data are centrally managed to support product selection, custom development, and failure analysis.

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