IEST Automatic Coin Cell 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 Machine (CAAS) integrates a high-precision robotic arm, AI vision inspection, automatic sealing device, high assembly throughput and full-process traceability, to achieve rapid, precision assembly of coin-type batteries with minimal training. It cuts labor costs, enhance assembly consistency, reduces repetitive labor, and accelerates electrode/electrolyte evaluations for Li-ion and Li-metal R&D and production.
Enhance Assembly Consistency
End-to-End Traceability
Cut Labor Costs
High-Throughput Assembly
Accelerates R&D of Li-ion Battery
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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
MaterialsNCMLFPGraphiteSilicon-based Anode
Charging Specific Capacity Range Value(mAh/g)＜ 1.5＜ 1.5＜ 1.5＜ 20
Disharging Specific Capacity Range Value(mAh/g)＜ 1.5＜ 1.5＜ 2.0＜ 20

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.

Specific Capacity Range Fluctuation Plot of NCM-1 During Charge-Discharge
σ Fluctuation Plot of NCM-1 Specific Capacity During Charge-Discharge

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.

Specific Capacity Range Fluctuation Plot of LFP During Charge-Discharge
σ Fluctuation Plot of LFP Charge-Discharge Specific Capacity

Automatic Assembly of the Graphite

For graphite anode materials, the charge/discharge specific capacity ranges <1.5mAh/g and 2mAh/g respectively.

Specific Capacity Range Fluctuation Plot of Graphite During Charge-Discharge
σ Fluctuation Plot of Graphite Charge-Discharge Specific Capacity

Automatic Assembly of the Silicon-based Anode

For silicon-based anode materials the charge/discharge specific capacity ranges both <20mAh/g.

Specific Capacity Range Fluctuation Plot of Silicon-based Anode During Charge-Discharge
σ Fluctuation Plot of Silicon-based Anode Charge-Discharge Specific Capacity
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High Throughput Assembly

± 0 mm

Assembly Concentricity

0 cells/h

Assembly Speed

0 %

Reduce the Assembly 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.
Cell Assembly Process Taceability

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.

Equipment Expansion​

High-Throughput Automatic Electrolyte Switching System​
Equipment Features:
Can interface with an automatic electrolyte formulation platform. The system 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 system with an accuracy of ±1 μL. Injection volume for a single cell is continuously adjustable from 0 to 200 μL.
The injection tips can be automatically switched to prevent cross-contamination of electrolytes.
Equipped with an automatic electrolyte transfer and short-term storage system. Single transfercapacity: 25 bottles (60 mL/bottle). Maximum storage capacity:200 bottles.
IEST-Coin-Cell-Automatic-Assembly-System-CAAS-Series-details-23

1. Case 1: Manual Assembly VS Auto Assembly

IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-12
IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-13
IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-11
IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-10

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

IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-15
IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-16
IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-18
IEST-Automatic-Coin-Cell-Assembly-System-CAAS-Details-17

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

IEST Automatic Coin Cell Assembly System(CAAS) Details-19
IEST-Automatic-Coin-Cell-Assembly-SystemCAAS-Details-20

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

IEST-Automatic-Coin-Cell-Assembly-SystemCAAS-Details-21

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.

CAAS1000MCAAS1100MCAAS1200M
Photo
Assembly Feature1~10ea40ea200ea
Assembly Accuracy±0.2mm
Assembly Efficiency1 ~ 1.5 cell/min
Function1. Compatible with customer standard glove boxes.
2. Modular robotic arm.
3. Vision detection and positioning system.
4. Automatic sealing machine.
5. Automatic Electrolyte dispensing.		1. Integrated double-sided four-station glove box.
2. High-precision robotic arm.
3. High-throughput assembly.
4. Vision detection and positioning system.
5. Automatic sealing machine.
6. Automatic Electrolyte dispensing.
7. Multi-module function options.

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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