天目湖先进储能技术研究院

Lithium Battery Production Process

1

Important processes that affect battery quality and consistency:

Mixing, coating, drying, rolling, laser cutting, electrolyte filling, etc.;

These processes involve multiple simulation challenges such as non-Newtonian fluids, particles, turbulence, chemical reactions, phase changes, microfluidics, etc.

Slurry Coating

Physical Models:

1. Transient Analysis

2. Laminar Flow

3. Eulerian Multiphase Flow:

• Slurry: Non-Newtonian Fluid Carreau-Yasuda Model

• Air: Constant Density Fluid

4. Interphase Interaction: Surface Tension

5. Volume of Fluid (VOF)

Slurry Extrusion

A CFD simulation is conducted to analyze the flow conditions of the slurry inside the coating die, focusing on the flow distribution at the slit outlet. The goal is to optimize the opening size at different positions to achieve a uniform flow distribution at the slit outlet.

Physical Models:

1. Steady-State Analysis

2. Laminar Flow

3. Viscous Flow:

• Viscosity: Non-Newtonian Fluid Carreau-Yasuda Model

• Fitting Curve Derived from Rheological Curve Fitting

Particle Packing Simulation