Product description
It is a testing system equipped with high precision thickness measuring sensor and mechanical sensor, which can achieve long-term stability and accurate detection of cell thickness and swelling force to realize performance evaluation under different conditions. The in-situ analysis method can be used by lithium battery researchers to analyze the cells’ swelling behavior and the whole production processes, which allows researchers to design cells with better performance.
Lithium-ion Batteries Swelling Behavior and its Importance in Battery Research
During the lithium-ion batteries charging and discharging process, lithium ions are inserted and extracted in the negative electrode, which causes cells to expand and contract. The ideal process is that the insertion and extraction of lithium ions is reversible; however, it is generally not how it works in the actual process. Part of the lithium ions cannot be extracted from the negative electrode or deposited on the surface of the anode, which results in irreversible swelling of the battery cell, deformation of the battery cell, fragmentation of material particles, rupture of the SEI film, and the consumption of electrolyte.
The swelling behavior of the battery is an important indicator in evaluating the reliability of the battery. During the production process, the negative electrode material’s particle size, binder and pole piece structure must be optimized. The theoretical swelling ratio of next generation high-energy density anode materials (silicon, lithium metal, etc.) is much greater than graphite anode materials. Therefore, we can optimize the battery cell module to ensure safety and to improve module space utilization by using the result of battery cell swelling behavior. Additionally, our system can also accurately determine the battery cell’s lithium SOC window under different magnifications, which can be helpful in developing fast charging technology.
Features:
- Multi-function test modes: Constant pressure and constant gap test modes can be realized for the cell, and the performance of the cell under different stress conditions can be evaluated
- High precision control: Accurately control the gap change within ~1 um by active modulation, and get the accurate swelling force change of the cell
during the test - Highly stable and reliable
- Ability to realize performance evaluation under different conditions
Applications:
- Lithium Plating Analysis
- Material Evaluation: Anode Material, Binder
- Process Conditions: Pressure, Temperature, Stress
- Cell Structure: M6S V.S SLS
- Others
Model Types:
| IE0302 | IE0303 |
| Automatic control by software | |
| 1. Cell expansion force 2. Cell initial thickness 3. Cell temperature 4. Cell expansion thickness 5. Cell stress-strain curve | 1. Cell expansion force 2. Cell initial thickness 3. Cell temperature 4. Cell expansion thickness 5. Cell stress-strain curve |
| ◆Constant gap mode (accuracy ±0.3%F.S) ◆Constant pressure mode (accuracy ±1μm) ◆Compression modulus mode ◆Software compatible with charge and discharge device data ◆Fully automatic measurement software: automatic collection of expansion force, expansion thickness, cell temperature, free choice of mode, free setting of experimental parameters ◆Multiple units can be connected in parallel to achieve up to eight channels of simultaneous testing | ◆Constant gap mode (accuracy ±0.3%F.S) ◆Constant pressure mode (accuracy ±1μm) ◆Compression modulus mode ◆Software compatible with charge and discharge device data ◆Fully automatic measurement software: automatic collection of expansion force, expansion thickness, cell temperature, free choice of mode, free setting of experimental parameters ◆Multiple units can be connected in parallel to achieve up to eight channels of simultaneous testing ◆Constant temperature control: -20~80℃ |
Technical Specifications：
| Pressure Range (kg/cm2) | 10~1000 |
| Pressure measuring resolution ratio/accuracy | 1kg±0.3% |
| Absolute Thickness Range (mm) | 100 |
| Absolute thickness measuring resolution ratio/accuracy | 1μm/±10μm |
| Relative Thickness Range (mm) | ± 5 |
| Relative thickness measuring resolution ratio/accuracy | 0.1μm/±1μm |
| Measurable Maximum Pouch Cell Size (mm) | 220 x 180, customizable |
| Supply Voltage (V) | 220 / 110 (Optional) |
| Power Dissipation (W) | 3500W (IE0302)/ 500W (IE0303) |
| Environmental Temperature (°C) | 20~30 |
| Environmental Humidity at 40°C | < 95%RH |
| Environmental Magnetic Field | Keep away from intense electromagnetic fields |
| Weight (kg) | 150kg (IE0302)/ 330kg (IE0303) |
* Please contact us for multi-channel option.
