IEST Electrode Electrolyte Wetting Testing System(EWS/ETS/CHT)

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.