Electrode Stacking Module for Lithium-Ion Battery Assembly

Product Specifications

Technical details and manufacturing context for Electrode Stacking Module

Definition

The Electrode Stacking Module is a critical component within a Lithium-Ion Battery Cell Assembly System. It is responsible for the automated, high-precision layering of positive electrodes (cathodes), negative electrodes (anodes), and separator films in a precise, alternating sequence (e.g., anode-separator-cathode-separator-anode) to form the internal electrode stack or 'jelly roll' of a prismatic or pouch battery cell. This process is fundamental to cell performance, directly impacting energy density, power output, and safety.

The module typically uses a combination of robotic arms, precision grippers, and vacuum handling systems to pick individual electrode sheets (coated with active material) and separator sheets from feeding stations. It then places them onto a stacking stage or mandrel with micron-level accuracy. Advanced vision systems and sensors ensure correct alignment, orientation, and layer count. The process is controlled by a programmable logic controller (PLC) that coordinates the sequence, timing, and placement force to build a uniform, defect-free stack.

Key parameters include stacking speed (0.5–2.0 s/layer), positioning accuracy (±0.05 mm), layer thickness range (0.05–0.5 mm), max stack height (200 mm), operating temperature (15–35 °C), relative humidity (≤10 % RH), air pressure supply (0.5–0.7 MPa), power consumption (1.5–3.0 kW), control voltage (24 ±10% V DC), machine weight (800–1200 kg), footprint (2000×1500×1800 mm), and IP rating (IP54 per IEC 60529). These values are reference ranges and must be verified for the specific model and application.

Materials on file include aluminum alloy for the frame, stainless steel for guides and actuators, engineering plastics for insulating parts, and ceramic components for wear surfaces. The module is designed for integration into cleanroom environments and requires a controlled atmosphere to prevent moisture absorption by electrodes.

For procurement, verify model-specific specifications, installation requirements, and compliance with applicable standards with the legal manufacturer or supplier. The listed IP rating is a reference to IEC 60529 and does not imply certification of any specific product.

Working Principle

The module operates by picking individual electrode and separator sheets from feeding stations using robotic arms, precision grippers, and vacuum handling. It places them onto a stacking stage or mandrel in a precise alternating sequence. Vision systems and sensors verify alignment, orientation, and layer count. A PLC coordinates the sequence, timing, and placement force to build a uniform stack. The process is designed for micron-level accuracy to prevent defects and ensure cell performance.

Common Materials

Aluminum alloy (frame/structure), Stainless steel (guides, actuators), Engineering plastics (insulating parts), Ceramic components (wear surfaces)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Stacking Speed	0.5–2.0 s/layer	Higher speed reduces cycle time but may affect alignment accuracy.
Positioning Accuracy	±0.05 mm	Critical for electrode alignment to prevent short circuits.
Layer Thickness Range	0.05–0.5 mm	Accommodates various electrode and separator thicknesses.
Max Stack Height	200 mm	Determines maximum battery cell thickness.
Operating Temperature	15–35 °C	Outside this range, material handling may be affected.
Relative Humidity	≤10 % RH	Low humidity required to prevent moisture absorption by electrodes.
Air Pressure Supply	0.5–0.7 MPa	Required for pneumatic actuators and vacuum systems.
Power Consumption	1.5–3.0 kW	Depends on servo drives and control system.
Control Voltage	24 ±10% V DC	Standard for PLC and sensor interfaces.
Machine Weight	800–1200 kg	Affects floor loading and installation requirements.
Footprint (L×W×H)	2000×1500×1800 mm	Compact design for cleanroom integration.
IP Rating	IP54	Protects against dust and water splashes.IEC 60529

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Precision Stacking Stage
Provides a flat, stable, and precisely controlled surface or mandrel where the electrode layers are sequentially assembled.

Material: Granite or polymer composite (for vibration damping and thermal stability)
Robotic Handling Arm
A multi-axis robotic arm equipped with specialized end-effectors (grippers/vacuum cups) to pick and place electrode and separator sheets.

Material: Aluminum alloy, carbon fiber
Vision Alignment System
A camera-based system that inspects each electrode sheet for defects and provides feedback for precise positional alignment during placement.

Material: Stainless steel (housing), optical glass (lens)
Separator Feeding & Tensioning Unit
Unwinds separator film from a roll, maintains precise tension, cuts it to length, and presents it for stacking between electrode layers.

Material: Anodized aluminum, ceramic guides
PLC
Sequences the pick-place order, timing and placement force for each layer.

Manufacturers of Electrode Stacking Module

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Frequently Asked Questions

What is the typical stacking speed range?

The stacking speed is typically 0.5 to 2.0 seconds per layer. Higher speeds reduce cycle time but may affect alignment accuracy. Confirm the exact speed for your specific model and application with the manufacturer.

What positioning accuracy can be expected?

The positioning accuracy is typically ±0.05 mm. This is critical for electrode alignment to prevent short circuits. Verify the accuracy for the specific module configuration.

What are the environmental requirements?

The module operates in temperatures of 15–35 °C and relative humidity ≤10 % RH. Low humidity is required to prevent moisture absorption by electrodes. Ensure your facility meets these conditions.

What is the IP rating and what does it mean?

The IP rating is IP54 per IEC 60529, indicating protection against dust and water splashes. This is a reference standard; verify compliance with the manufacturer for your specific unit.

Data Basis

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Preliminary Technical Classification

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pressure:	Max 50 kPa (stacking pressure), 100 kPa (system pressure)
other spec:	Layer alignment tolerance: ±0.1 mm, Stacking speed: 0.5-5 layers/sec, Cleanroom class: ISO 7 or better
temperature:	+15°C to +35°C

Electrode Stacking Module

Product Specifications

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Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

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