IEST Coin Cell Automatic Assembly System(CAAS)

IEST Automatic Coin Cell Assembly System(CAAS)​

Next-Gen Coin Cell Assembly Solutions For Lab & Industrial-scale

The Automated Coin Cell Assembly System (CAAS) integrates a high-precision robotic arm, machine-vision inspection, and auto-sealing to achieve rapid, precision assembly of coin-type lithium batteries with minimal training. It cuts labor costs, ensures dimensional consistency, reduces retests, and accelerates electrode/electrolyte evaluations for Li-ion and Li-metal R&D and production.

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The Future of Coin Cell Assembly

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High Throughput Assembly

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Assembly Concentricity

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Assembly Speed

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Reduce the Assemblly Time

High-precision Robotic Arms for Precise Grasping

Precise gripping of curled electrodes achieves assembly concentricity within ±0.2mm.

Electrolyte Automated Switching/Washing

Specialized fixtures for different material types, along with automated electrolyte switching and washing functions, effectively prevent cross-contamination.

Specialized Material Fixtures

Specialized fixtures for different material types, completely eliminating cross-contamination

Save Time With High Throughput Assembly

Equipped with a 200-unit material rack, CAAS supports high throughput rapid auto-assembly while minimizing repetitive mechanical operations.

Automatic Sealing Module

The sealing module ensures precise control over pressure and thickness, significantly improving sealing integrity.

Full-process intelligent Monitoring

A dual CCD vision system provides real-time monitoring of material status throughout the process, making battery data traceable and transparent.

Reduce the Skill Threshold for Operators

The CAAS system significantly lowers the skill threshold for operators, allowing staff to master coin cell assembly without intensive training.

System Features

Glove box integration

Glove Box Integration

Integrated glovebox provides controlled anhydrous/oxygen-free assembly atmosphere ensuring coin cell performance.
High-speed robot assembly

High-speed Robot Assembly

High-speed robotic material handling with optimized layout achieves ~1cell/min, enabling high-throughput coin cell assembly.
High-precision assembly

High-precision Assembly

±0.2mm concentricity tolerance guaranteed by precision positioning system for consistent coin cell stacking.
High-speed robot assembly

Cell Assembly Process Taceability

(Optional) Process traceability system with HD imaging and AI-based inspection for defect material rejection.
High-throughput Assembly

High-throughput Assembly

Batch loading capacity: 200 cells enabling continuous high-throughput assembly.
Batch Association

Batch Association

Electrode materials traceable via barcode scanning; In-chamber inkjet marking enables batch association.
Auto Electrolyte injection

Auto Electrolyte injection

Automated electrolyte injection with online switching between chemistries + inline system rinsing.
Online voltage test

Online Voltage Test

Online OCV testing monitors cell survival rate and equipment stability.
Material Tray

Material Tray

Centralized feeding system: Electrode/separator/lithium foil trays with material traceability.
Automated Lithium Foil Brushing Function

Automated Lithium Foil Brushing Function

(Optional) Automated lithium foil brushing module enhances surface quality and stacking uniformity.
CAAS-Sentinel Management

Sentinel Management

Top-mounted diagonal HD cameras enable real-time process monitoring and management.
Functional Modularity

Functional Modularity

Modular architecture allows flexible configuration and providing customized services
Particle Control

Particle Control

Glove box with dedicated dust removal, cleanroom-grade 4-axis robots, shielded drive components, non-metallic trays with material-specific vacuum grippers.
Data Processing

Data Process Software

Proprietary data management software automatically aggregates process parameters for user-friendly access and archiving.

1. Case 1: Manual Assembly VS Auto Assembly

IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-1
Comparison of electrochemical test results after manual assembly and CAAS assembly

For NCM materials:
The range of charge-discharge specific capacity for automated coin cell assembly was observed to be 0.6 to 0.9 mAh/g, with a standard deviation (σ) of approximately 0.25.
The range for manual coin cell assembly was 1 to 2 mAh/g, with a standard deviation (σ) of approximately 0.4.

For Silicon-based anode materials:
The range of charge-discharge specific capacity for automated coin cell assembly was observed to be 15 to 20 mAh/g, with a standard deviation (σ) ranging from 4 to 6.
The range for manual coin cell assembly was 20 to 40 mAh/g, with a standard deviation (σ) ranging from 5 to 10.

Conclusion:​ While the average specific capacity values obtained from automated and manual assembly methods were comparable for both material types, automated assembly demonstrated superior stability compared to manual assembly.

2. Case 2: Automatic Assembly of the NCM Half Cells

IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-2
IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-3

Conclusion:​

The σ of each group of charge/discharge specific capacity is less than 0.4.
The range of charge/discharge gram capacity can be controlled within 1.5 mAh/g.
The COV value of each group of charge/discharge specific capacity is less than 0.3%.

3. Case 3: Automatic Assembly of the LFP Half Cells

IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-5
IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-6

Conclusion:​

The σ of each group of charge/discharge specific capacity is less than 0.4.
The range of charge/discharge specific capacity can be controlled within 1.5 mAh/g.
The COV value of each group of charge/discharge specific capacity is less than 0.3%.

4. Case 4: Automatic Assembly of Graphite Half Cells

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IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-7

Conclusion:​

The σ of each group of discharge specific capacity is less than 0.8, and the σ of the charge specific capacity is less than 0.5.
The range of discharge specific capacity can be controlled within 2.1 mAh/g, and the range of charge specific capacity is less than 1.5 mAh/g.
The COV value of each group of charge/discharge specific capacity is less than 0.2%.

5. Case 5: Single-sided electrodes turn curled after slitting

Conclusion:​

Our specially designed suction cup can ensure that the curled electrodes are sucked evenly and flatly.
Our visual positioning system can avoid the placement position deviation caused by the curling of the electrodes.
The positive electrode shell is pressed down horizontally to flatten the curled electrode that contacts the electrolyte.

CAAS1000G/MCAAS1100G/MCAAS1200G/M
Photo
Assembly Feature1 Cell Each Time40 Cells Each Time200 Cells Each Time
Assembly Accuracy±0.2mm
Assembly Efficiency1 ~ 1.5 cell/min
Function1. Single Position Automatic Assembly System.
2. High-precision Assembly.
3. Rapid Assembly.
4. Assembly Process Traceability.
5. Integration into the standard single-station glove box.		1. Multi-station Automatic Assembly System.
2. High Precision Assembly.
3. Rapid Assembly.
4. High-throughput assembly.
5. Assembly process traceability.
6. Automatic lithium chip brushing module.

IEST Coin Cell Automatic Assembly System(CAAS)

Next-Gen Coin Cell Assembly Solutions For Lab & Industrial-scale

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FAQs

Only material loading requires manual operation. The fully automated process allows extended unattended operation, enabling continuous autonomous production

  • Coin-type half-cells / full cells
  • Coin-type symmetric cells
  • Coin-type Li-Cu cells
  • Coin-type Li-Li cells

The key distinction is that the CAAS1200 is an upgraded version of the CAAS1100. It adds 200-unit material rack while maintaining identical optional functions, with enhanced program capabilities.

The electrolyte dispensing pump enables in-line switching between 3 electrolyte types (standard configuration). Support for additional types requires customization.

Our CAAS system employs dual-parameter monitoring (sealing pressure + thickness) with subsequent open-circuit voltage (OCV) testing and automated visual inspection of sealed cells.

For CR20-series coin cells, model switching requires no complex reconfiguration. If the coin cell is different diameter, sealing mold, material trays, and fixtures must be replaced.

Material handling trays can be programmed with customizable depletion thresholds, enabling proactive low-material alerts.

The material's center positioning uses the negative electrode shell's center as the reference datum. After the robotic arm places the negative electrode shell onto the assembly station, its position is captured by imaging. This establishes the benchmark center point for subsequent battery assembly. Each subsequent component is first imaged by a positioning CCD camera to locate its center. This position is compared with the negative electrode shell's center, and the robotic arm then places the component into position through algorithmic adjustments.

Yes, the CAAS system features a C++ based API. This facilitates seamless integration with Laboratory Information Management Systems (LIMS).

Specialized fixtures for different material types, along with automated electrolyte switching and washing functions, effectively prevent cross-contamination.

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