IEST Lithium Battery Slurry Resistance Tester(BSR2300)

The slurry is an important intermediate product in the production of lithium-ion batteries. The uniformity and stability of the slurry greatly affect the consistency and electrochemical performance of the final battery cell. The current method of monitoring slurry only has viscosity parameters, which cannot accurately evalu- ate the uniformity and stability of its electrical proper- ties. However, the slurry conductivity parameters and slurry formulation, conductive agent type and content, binder type andcontent etc, which all have significant correlation to monitor the production of slurry, and the slurry may have gel sedimentation after dwelling for a period of time after mixing. At this time, the conductivity value will also show varying degrees of change. Therefore, the conductivity of the slurry can be used as a method to characterize the uniformity and stability of the electrical properties of the slurry.

Monitoring the conductivity of the slurry, not only , it can evaluate the infuence of diferent active materials.conductive agents, binders, solid content, etc, on the electrochemical performance of the slurry, but alsoit can also be used for, monitoring the process stability, which can quickly identify abnormalities in the mixingprocess, and avoid the waste of time and cost caused by defective slurry flowing into the subsequent process.

2. Slurry Resistivity Test Principle

Test steps: Putting a certain volume of slurry (~80mL) into the measuring glass, inserting a clean electrode pen, start the software, start to test the changes in the slurry resistivity at the three pairs of electrodes over time and save it in the file.

Test parameters: Resistivity, Temperature, Time

Calculation formula:

Character:

• Separate the voltage and current lines, eliminate the influence ofinductance on voltage measurement, and improve the accuracy ofresistivity detection;
• The disk electrode with a diameter of 10mm ensures a relatively largecontact area with the slurry and reduces the testing errors;
• Monitoring the changes of resistivity ofthe slurry in real time at threepositions in the vertical direction over time;

3. Slurry Resistivity Analyzer MSA

Test program: Three operators, five parallelsamples, and random testing

Test method: Sonicating the electrode pen withdeionized water for 30 seconds,and drying it with the dust-freepaper. Then five parallel sampleswas tested, and the fifth set of datawas taken for the GRR analysis

4. Applications