IEST Powder Resistivity & Compaction Density Measurement System (PRCD3100)

Introduction: PRCD3100 combined with high-precision pressure control,thickness and resistance testing system, free choice of four-probe and two-probe method. Accurately test the resistivity and compaction density of powders for material research and development and batch stability monitoring of powder materials.

Features:

  1. Ultra-wide pressurization range (maximum 350MPa) and ultra-wide resistance measurement range (200MΩ);
  2. When measuring resistance, two-probe and four-probe dual principles can be switched freely;
  3. Fully automatic test software, free parameter setting, one-click start;
  4. Real-time monitoring and output of pressure, pressure, ambient temperature, ambient humidity, thickness, resistance, resistivity, conductivity, compaction density and other parameter curves, and automatic saving of test data.
  5. Multiple powder test modes: pressurization, single-point pressure relief, steady-state pressure relief;
  6. Equipped with standard thickness blocks and resistance blocks calibrated by a third-party metrology institute.

Application:

  • Lithium (sodium) positive and negative electrode powders (LCO/NCM/LFP/Graphite, etc.),
  • Conductive agents
  • Solid electrolyte powders
  • Other micron-sized powder materials, etc.

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Description

1. The Significance of Powder Resistance

The rate performance of lithium-ion batteries(LIBs) is closely relatedto the battery resistance. The battery resistance includes ionic resis-tance and electronic resistance. The ionic resistance mainly refers tothe resistance of lithium ions in the electrolyte in the electrodepores, the resistance of lithium ions through the solid electrolyte interphase(SEl),the chargetransfer resistance of the lithium ions and electrons at the interfaceof the active material/SEl , and the solid diffusion resistance of thelithium ions in the active material. The electronic resistance mainlyrefers to the resistance of the positive and negative active materialsthe current collector resistance, the contact resistance between theactive materials, the contact resistance between the active materialand the collector, and the welding resistance of tabs. in the practical production process of LIBs, the ionic resistance partneeds to be evaluated by using the finished product. However,the electronic resistance part can be quickly evaluated byusing the materials and electrodes. Therefore, the accurate evaluation of the electronic resistance of the materials andelectrodes is of great significance for predicting the resistance of the LIBs.

IEST Powder Resistivity & Compaction Density Measurement System details-1

2. Measurement System Analyze

Test condition: 5 samples, 3 operators, 3 times/pcs/operator

IEST Powder Resistivity & Compaction Density Measurement System details-13

3. Features

  • High accuracy pressure system : Driven by servo motor.
  • High accuracy displacement sensor : Precisely measure the variation of thickness.
  • Specific clamp for resistivity & Compact density test of powder samples : Simplify the process of the powder loading and cleaning.
  • Multi-functions : One-stop data collection of key parameters of pressure, resistance, thickness, temperature and humidity with high reliability, to provide a complete traceability for each result.
  • Automatic measurement : Providing flexible measurement modes for different kinds of samples, and all the process parameter setting are integrated into a simple software control interface, with one-button to start a measurement
  • Integrated design :Integration of control and measurement systems for pressure, resistivity and thickness control and measurement systems.

4. PRCDMS Software:

  • Pressure can be set willfully within the extent of max pressure.
  • The resistivity under different pressure can be measured in succession with controllable rate and interval of pressure scan.
  • Different data analysis curves can be generated, including resistivity-pressure curve, resistivity-thickness curve, Compact density-pressure curve, and pressure-thickness curve.
  • Two resistance data collection modes: interval time mode or automatic steady state condition determine mode.
  • Data statistical analysis functions.
  • Automatic generation of reports with the value of resistivity (or conductivity) and Compact density.

5. Applictions

IEST Powder Resistivity & Compaction Density Measurement System details-2

Updated on Jan. 8, 2025