IEST In-Situ Battery Gassing Volume Analyzer (GVM2200)

Description

1. Principle of Electrode Wetting

The Lucas–Washburn Equation is commonly used to describe the dynamic of liquid absorption in electrode pores, as represented by the equation below:

• r represents the radius of the capillary (m),
• σ represents the surface tension of the imbibition fluid (N/m),
• η represents the viscosity of the imbibition fluid (Pa*s),
• θ represents the contact angle of the wet phase (°),
• h represents the liquid suction height (m),
• t represents the liquid suction time,
• cr represents a fixed value, called the formal radius.

2. Applications

• Electrolyte performance evaluation

• Electrode consistency assessment

• Material / electrode surface-treatment process optimization

• Battery performance prediction

• Production process improvement

• Research & development(R&D)

3. Electrolyte Wetting Characterization Solutions

3.1 Capillary Wetting System: EWS Series – Simulation & electrode uniformity

Key Features：

• Equipped with a high-precision vision acquisition system, ensuring stable and efficient test repeatability.
• Enables in-situ real-time characterization of the electrolyte wetting rate for lithium-ion battery anode electrodes.
• Applicable Samples: anode electrode
• The greater the compacticion of the electrode, the lower the porosity, resulting in poorer electrolyte wetting.

3.2 Height Wetting System: CHT Series – Electrode uniformity & process stability

Key Features：

• Equipped with a high-precision vision acquisition system, ensuring stable and efficient test repeatability.
• Enables in-situ real-time characterization of the electrolyte wetting rate for lithium-ion battery anode electrodes.
• Applicable samples: Anode electrodes
• Supports simultaneous testing of three parallel samples, demonstrating good consistency in electrolyte wetting.

3.3 Weight Wetting System: ETS Series

3.3.1 ETS-1000 – Evaluate Jelly Roll(JR) Wetting Time for Dry Cells

Key Features：

• Equipped with a high-precision vision acquisition system, ensuring stable and efficient test repeatability.
• Enables in-situ real-time characterization of the electrolyte wetting rate for lithium-ion battery anode electrodes.
• Applicable samples: Anode electrodes/Jelly Roll(JR) cells
• Supports simultaneous testing of three parallel samples, demonstrating good consistency in electrolyte wetting.

3.3.2 ETS-2000 Dry Cell JR Weight Testing System

Key Technical Features

• Weighing System: Maximum capacity 6 kg, accuracy ±0.1 g, meeting Jelly Roll (JR) test requirements;
• Liquid Level Control: Integrated electrolyte tank level control system (syringe pump + height sensor) to reduce inter-group test errors caused by liquid level fluctuations;
• Pressurized Testing: Added surface pressure fixture (pressure range: 0-0.4 MPa) with pressure film detection system for real-time monitoring of pressure variations during wetting;
• JR Resistance: Expanded channels with an internal resistance meter to externally monitor changes in JR internal resistance during wetting.