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iestinstrument
IEST Automatic Coin Cell Assembly Machine(CAAS)
High-Throughput Automated Battery Cell Fabrication & Coin Cell Assembly Machine
Next-Gen Button Cell Assembly Solutions for Advanced Battery R&D & QC
The Automated Coin Cell Assembly Machine (CAAS) is an industrial-grade, high-throughput platform engineered for for high-precision, high-consistency assembly of lithium-ion, sodium-ion, and solid-state coin cells in battery R&D. It replaces manual coin cell assembly with high-precision robotic arm, AI vision inspection, automatic sealing device, high-throughput assembly and full-process traceability. The system achieves an industry-leading assembly concentricity of ±0.2mm, resolving data discrepancies caused by manual stacking errors and electrode curling. Ideal for universities, high-throughput electrolyte screening, and industrial QC & R&D lab.
200 ea
High Throughput Assembly
±0.2 mm
Assembly Concentricity
60 cells/h
Assembly Speed
90 %
Reduce the Assembly Time
Looking for a more compact setup or working with a limited lab space or budget?
The Future of Coin Cell Assembly
Currently, the consistency of coin cell test data meets the standards of leading lithium battery enterprises.
| Specific Capacity Range Comparison of Coin Cells During Charge/Discharge Cycling | ||||
|---|---|---|---|---|
| Materials | NCM | LFP | Graphite | Silicon-based Anode |
| Charging Specific Capacity Range Value (mAh/g) | < 1.5 | < 1.5 | < 1.5 | < 20 |
| Discharging Specific Capacity Range Value (mAh/g) | < 1.5 | < 1.5 | < 2.0 | < 20 |
1. Automatic Assembly of the NCM
For NCM cathode materials, the charge/discharge specific capacity range of <1.5mAh/g and σ standard deviation fluctuation below 0.4.
2. Automatic Assembly of the LFP
For LFP materials, the charge/discharge specific capacity range of <1.5mAh/g and σ standard deviation fluctuation below 0.4.
3. Automatic Assembly of the Graphite
For graphite anode materials, the charge/discharge specific capacity ranges <1.5mAh/g and 2mAh/g respectively.
4. Automatic Assembly of the Silicon-based Anode
For silicon-based anode materials the charge/discharge specific capacity ranges both <20mAh/g.
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.
Automatic Sealing Module
The sealing module ensures precise control over pressure and thickness, significantly improving sealing integrity.
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.
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
Integrated glovebox provides controlled anhydrous/oxygen-free assembly atmosphere ensuring coin cell performance.
High-speed Robot Assembly
High-speed robotic material handling with optimized layout achieves ~1cell/min, enabling high-throughput coin cell assembly.
High-precision Assembly
±0.2mm concentricity tolerance guaranteed by precision positioning system for consistent coin cell stacking.
Cell Assembly Process Traceability
(Optional) Process traceability system with HD imaging and AI-based inspection for defect material rejection.
High-throughput Assembly
Batch loading capacity: 200 cells enabling continuous high-throughput assembly.
Batch Association
Electrode materials traceable via barcode scanning; In-chamber inkjet marking enables batch association.
Auto Electrolyte Injection
Automated electrolyte injection with online switching between chemistries + inline system rinsing.
Online Voltage Test
Online OCV testing monitors cell survival rate and equipment stability.
Material Tray Test
Centralized feeding system: Electrode/separator/lithium foil trays with material traceability.
Automated Lithium Foil Brushing Function
(Optional) Automated lithium foil brushing module enhances surface quality and stacking uniformity.
Sentinel Management
Top-mounted diagonal HD cameras enable real-time process monitoring and management.
Functional Modularity
Modular architecture allows flexible configuration and providing customized services.
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 Process Software
Proprietary data management software automatically aggregates process parameters for user-friendly access and archiving.
Equipment Expansion
High-Throughput Automatic Electrolyte Switching System
- Equipment Features: Can interface with an automatic electrolyte formulation platform. Enables automatic switching between 100 different electrolyte recipes, supports continuous assembly of 400 battery cells.
- Application Scenario: Suitable for coin cell assembly for electrolyte formulation verification and high-throughput battery assembly.
Liquid Injection Module
- High-precision liquid injection with accuracy of ±1 μL. Injection volume continuously adjustable from 0 to 200 μL.
- Injection tips automatically switched to prevent cross-contamination of electrolytes.
- Automatic electrolyte transfer & short-term storage. Single transfer: 25 bottles (60 mL/bottle). Max capacity: 200 bottles.
1. Case 1: Manual Assembly VS Auto Assembly
| Assembly Comparison | Manual Assembly | Automatic Assembly | |||||
|---|---|---|---|---|---|---|---|
| Item | Charge capacity (mAh/g) |
Discharge capacity (mAh/g) |
Efficiency (%) |
Charge capacity (mAh/g) |
Discharge capacity (mAh/g) |
Efficiency (%) |
|
| NCM-1 | Range value | 1.1 | 1.3 | 0.22% | 0.7 | 0.7 | 0.26% |
| Average | 225.525 | 211.142 | 93.62% | 225.325 | 211.05 | 93.66% | |
| σ | 0.384 | 0.396 | 0.001 | 0.226 | 0.198 | 0.001 | |
| COV | 0.17% | 0.19% | 0.07% | 0.10% | 0.09% | 0.08% | |
| NCM-2 | Range value | 1.8 | 2 | 0.23% | 0.6 | 0.9 | 0.23% |
| Average | 225.467 | 211.7833 | 93.93% | 225.292 | 211.6083 | 93.93% | |
| σ | 0.44 | 0.465 | 0.001 | 0.178 | 0.231 | 0.001 | |
| COV | 0.20% | 0.22% | 0.07% | 0.08% | 0.11% | 0.07% | |
| Assembly Comparison | Manual Assembly | Automatic Assembly | |||||
|---|---|---|---|---|---|---|---|
| Item | Charge capacity (mAh/g) |
Discharge capacity (mAh/g) |
Efficiency (%) |
Charge capacity (mAh/g) |
Discharge capacity (mAh/g) |
Efficiency (%) |
|
| Silicon base-1 |
Range value | 20.6 | 12.6 | 0.55% | 17 | 16.8 | 0.25% |
| Average | 1908.4 | 2046.9083 | 93.24% | 1907.592 | 2044.9083 | 93.28% | |
| σ | 6.948 | 4.391 | 0.002 | 4.553 | 4.678 | 0.001 | |
| COV | 0.36% | 0.21% | 0.18% | 0.24% | 0.23% | 0.07% | |
| Silicon base-2 |
Range value | 39.7 | 22.4 | 1.46% | 19.9 | 22.2 | 0.38% |
| Average | 1897.85 | 2039.7833 | 93.02% | 1903.992 | 2041.5667 | 93.26% | |
| σ | 11.669 | 6.954 | 0.005 | 5.211 | 6.322 | 0.001 | |
| COV | 0.61% | 0.34% | 0.49% | 0.27% | 0.31% | 0.11% | |
For NCM materials:
- The range of charge/discharge specific capacity for NCM with automatic assembly is 0.6~0.9 mAh/g (σ ≈ 0.25), while with manual assembly it is 1~2 mAh/g (σ ≈ 0.4).
For Silicon-based anode materials:
- The range of charge/discharge specific capacity for Si-based materials with automatic assembly is 15~20 mAh/g (σ ≈ 4~6), while with manual assembly it is 20~40 mAh/g (σ ≈ 5~10).
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 Coin Cell Assembly of LFP Cathodes
| Category | Item | Group 1 | Group 2 | Group 3 | Group 4 | Group 5 | Group 6 | Group 7 |
|---|---|---|---|---|---|---|---|---|
| Range | Charge capacity (mAh/g) | 1.5 | 1.1 | 1.2 | 1.1 | 1 | 0.6 | 0.4 |
| Discharge capacity (mAh/g) | 1.3 | 1.2 | 1 | 1.3 | 0.9 | 0.6 | 0.5 | |
| Coulombic Effi (%) | 0.8 | 0.4 | 0.3 | 1.3 | 0.4 | 0.5 | 0.6 | |
| Average | Charge capacity (mAh/g) | 161 | 160.7 | 160.7 | 161.3 | 161.1 | 161.1 | 161.1 |
| Discharge capacity (mAh/g) | 156.9 | 156.7 | 156.6 | 157 | 156.9 | 156.9 | 156.9 | |
| Coulombic Effi (%) | 97.4 | 97.5 | 97.5 | 97.4 | 97.4 | 97.4 | 97.4 | |
| σ | Charge capacity (mAh/g) | 0.37 | 0.32 | 0.33 | 0.38 | 0.24 | 0.2 | 0.12 |
| Discharge capacity (mAh/g) | 0.31 | 0.36 | 0.29 | 0.3 | 0.25 | 0.16 | 0.12 | |
| Coulombic Effi (%) | 0.18 | 0.12 | 0.09 | 0.3 | 0.11 | 0.12 | 0.12 | |
| COV | Charge capacity (mAh/g) | 0.23% | 0.20% | 0.21% | 0.24% | 0.15% | 0.12% | 0.10% |
| Discharge capacity (mAh/g) | 0.20% | 0.23% | 0.18% | 0.19% | 0.16% | 0.10% | 0.10% | |
| Coulombic Effi (%) | 0.18% | 0.12% | 0.09% | 0.31% | 0.11% | 0.12% | 0.12% |
Conclusion:
- The standard deviation (σ) for the charge/discharge specific capacity of each group is less than 0.4.
- The range for the charge/discharge specific capacity of each group is less than 1.5 mAh/g.
- The coefficient of variation (COV) for the charge/discharge specific capacity of each group is less than 0.3%.
3. Case 3: Automatic Coin Cell Assembly of Graphite Anodes
| Category | Item | Group 1 | Group 2 | Group 3 | Group 4 | Group 5 | Group 6 | Group 7 |
|---|---|---|---|---|---|---|---|---|
| Range | Charge capacity (mAh/g) | 1.1 | 1.2 | 1.1 | 1.2 | 1.3 | 1.2 | 1.5 |
| Discharge capacity (mAh/g) | 1.8 | 1.8 | 1.8 | 1.9 | 2.1 | 2.1 | 2.1 | |
| Coulombic Effi (%) | 0.4 | 0.5 | 0.5 | 0.4 | 0.5 | 0.7 | 0.6 | |
| Average | Charge capacity (mAh/g) | 347.9 | 347.8 | 347.7 | 347.3 | 345.4 | 346.2 | 346.1 |
| Discharge capacity (mAh/g) | 367.8 | 368.4 | 368.2 | 368.2 | 367.7 | 368.2 | 368.8 | |
| Coulombic Effi (%) | 94.6 | 94.4 | 94.4 | 94.3 | 93.9 | 94 | 93.8 | |
| σ | Charge capacity (mAh/g) | 0.28 | 0.38 | 0.31 | 0.34 | 0.45 | 0.35 | 0.44 |
| Discharge capacity (mAh/g) | 0.57 | 0.62 | 0.6 | 0.53 | 0.51 | 0.65 | 0.69 | |
| Coulombic Effi (%) | 0.13 | 0.15 | 0.14 | 0.13 | 0.13 | 0.17 | 0.15 | |
| COV | Charge capacity (mAh/g) | 0.08% | 0.11% | 0.09% | 0.10% | 0.13% | 0.10% | 0.13% |
| Discharge capacity (mAh/g) | 0.16% | 0.17% | 0.16% | 0.14% | 0.14% | 0.18% | 0.19% | |
| Coulombic Effi (%) | 0.14% | 0.16% | 0.15% | 0.13% | 0.14% | 0.18% | 0.16% |
Conclusion:
- The standard deviation (σ) for the discharge specific capacity in each group is less than 0.8, and for the chargespecific capacity, it is less than 0.5.
- The range for the discharge specific capacity in each group is less than 2.1 mAh/g, and for the charge specificcapacity, it is less than 1.5mAh/g.
- The coefficient of variation (COV) for both charge and discharge specific capacity in each group is less than 0.2%.
4. Case 4: Curling Issue of Single-Sided Electrodes after Calendering and Punching
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.
| Model | CAAS1000 | CAAS1000G/M | CAAS1100G/M | CAAS1200G/M |
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| Assembly Feature | 1 ~ 10ea | 1 ~ 10ea | 40ea | 200ea |
| Assembly Accuracy | ±0.4mm | ±0.2mm | ||
| Assembly Efficiency | 2min/ea | 1 ~ 1.5 min/ea | ||
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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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