IEST Battery Pressure Distribution Measurement System
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MSE Supplies offers Battery Pressure Distribution Measurement System that can be used in battery industry. During the manufacturing process of the Lithium Ion Batteries (LIB), the internal stress distribution and the surface thickness distribution often occurred unevenly because the process environment is inconsistent. Additionally, the uneven current density and temperature distribution inside the LIB will also lead to uneven distribution of the stress during the expansion of the LIB. Our Battery Pressure Distribution Measurement System allows the user to perform quantitative characterization of the stress distribution on the surface of LIB, which provides a deeper perspective of the battery stress analysis and helps to develop a safer and more reliable LIB.
Features:
- Quantitatively evaluate the difference of electrolyte infiltration by using the capillary diffusion principle of electrolyte in the electrode and separator
- Equipped with high-precision mechanical control and visual acquisition system
- Capable of evaluating infiltration of different electrodes, electrolytes, separators with different formula and process
- Real-time characterization of the wetting rate of the electrolyte
- Quickly and quantitatively evaluate the surface flatness
Testing Procedure:
1. The resultant force curve of each detection unit will display in real time
2. Select the pressure distribution diagram according to the user's actual used area
3. Synchronize the charging and discharging data in real time
4. One-click to export the data report
5. Real-time pressure calibration (combined with in-situ expansion equipment)
Technical Specifications:
| Sensor Film Size, W×D(mm) | 160 x 160 |
| Sensing Unit Pressure Range (MPa) | 0~5 |
| Pressure Accuracy of Sensing Unit |
± 10%F.S |
| Sensing Unit Size (mm) | 7.5 x 7.5 |
| Sensor Thickness (mm) | < 0.3 |
| Number of Sensors | 16 x 16 array layout, 256 sensors in total |
| Data Collector | 1 (sampling frequency < 10Hz), |
| Data Collector Size (mm) | 20 x 80 x 120 |
Examples:
Test Information for below examples: NCM-Graphite system, 3~4.3V, 0.5C, 50kg preload
1. Stress distribution on the surface of the cell during the cycle
From the above results, we can quantitatively characterize the difference of stress distribution on the surface of the cell. These information not only helps to provide a deeper perspective of stress analysis of the cell, but also helps technicians to analyze
the stress distribution of the cell, understanding the causes of failure of the cell, and develop a safer and more reliable cell.
2. Surface flatness of fresh cell
From the above results, we can determine the correlation between the cell process design and the cell pressure distribution (flatness). Technicians and researchers can develop appropriate distribution standards via our pressure distribution system to monitor the batch stability of the delivered cells.