High-Precision Alternating Z-Stacking Technology
Z-Stacked Cell Construction — PCEONAMP Manufacturing Process
All PCEONAMP LiPo cells are manufactured on fully automatic Z-type stacking lines. This article outlines the core process parameters and design logic behind our high-rate cell construction.
Feeding & Positioning
The line operates on a symmetrical dual-station layout. The left station handles cathode electrode feeding and precision alignment; the right station handles the anode. Both stations use dedicated vacuum suction manipulators to pick, move, and place fragile electrode sheets without mechanical deformation or positional drift.
A central continuous separator unwinding system feeds the microporous polypropylene separator in a single uninterrupted pass, ensuring a consistent Z-fold geometry across the full stack height.
Stacking Sequence
The cycle is fully sequenced by the central PLC:
- Cathode sheet → placed at center of the stacking table
- Separator → drawn horizontally, full coverage over cathode
- Anode sheet → deposited over separator, edge-to-edge with cathode
- Second separator layer → completes one stacking unit
This cycle repeats continuously. For a standard high-rate cell, the final stack contains approximately 39 cathode/anode electrode pairs, with the anode extending one additional layer to fully enclose all cathode edges — a deliberate design to suppress lithium plating at the cathode periphery under high C-rate discharge.
Layer count is dynamically configured per cell specification (capacity, nominal voltage, target energy density, discharge C-rate).
In-Process Control
- Integrated machine-vision alignment on every single layer (cathode, anode, separator)
- High-precision servo motion control for sub-micron placement repeatability
- Real-time positional feedback eliminates cumulative drift across the full 39-layer stack
- Post-stack visual + ultrasonic inspection for internal delamination or misalignment
Why Z-Stacking for High-Rate Cells
| PARAMETER | Z-STACKED | WOUND |
|---|---|---|
| Internal stress distribution | Uniform | Concentrated at edges |
| Volumetric active material utilization | Higher | Lower (core density loss) |
| Sustained 80C–160C discharge | Stable thermal profile | Hot-spot risk at winding edges |
| Cycle life under vibration (UAV/RC) | Superior (seamless Z-fold) | Separator peel risk |
Z-stacking is the preferred architecture for high-rate pouch cells where sustained multi-kW discharge and mechanical shock resistance are non-negotiable.
This is the process behind our 10,000 / 16,000 / 22,000 / 32,000mAh UAV lines and our high-rate RC pack production.