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In-Situ Expansion Testing Machine for Lithium-Ion Batteries - Reliable China Suppliers & Factory
Product name |
In-situ expansion analysis system |
Model |
TA-WXHYL-1000kg |
Pressure Adjustment Range |
10kg ~ 1000kg |
Pressure Adjustment Accuracy |
≤ ±0.3% FSR |
Structural Mode |
Vertical type: Servo motor screw drive structure |
Test Chamber |
1. Inner box dimensions: W600 × D600 × H600 mm 2. Compression plate: W300 × D400 mm 3. Temperature control range: -20℃ to +80℃ (adjustable) 4. Temperature rise rate: ≥ 3℃/min (without load) 5. Cooling rate: ≥ 1℃/min (without load) 6. Temperature fluctuation: 0.5℃ 7. Temperature uniformity: ±2℃ 8. Temperature deviation: ±2℃ (without load) 9. Insulation material: Rock wool (flame retardant; high temperature resistant) 10. Inner box material: SUS304 stainless steel t=2.0mm 11. Pressure relief port: Located on the left side. Size: ≥ W200×H200mm. Automatically opens when battery explosion shock wave pressure ≥ 0.104MPa. 12. Test hole: Ø100mm on the right side, with silicone plug. Opens upon battery explosion and also serves as a pressure relief port; equipped with a chain to prevent ejection. |
Displacement Thickness Sensor |
1. Servo motor encoder for displacement and thickness detection. 2. External micron-level displacement sensor for displacement and thickness detection. |
Test Trip |
0 ~ 90 mm |
Thickness Measurement Resolution |
0.001 mm |
- Constant Pressure Mode: Monitors the thickness change of the battery at a constant pressure, simulating the actual force conditions of the battery cell.
- Constant Gap Mode: Monitors the expansion force change at a fixed thickness, evaluating the structural stress on the module/shell.
- The displacement resolution reaches 0.1μm, accurately capturing minute phase change expansion.
- High-precision pressure sensor ensures real-time accuracy of mechanical data.
- Synchronously collects six-dimensional data including voltage, current, capacity, thickness, pressure, and temperature.
- Automatically generates professional analysis charts such as thickness-capacity, expansion force-SOC, and dQ/dV correlations.
- 🔍 Irreversible Expansion Analysis: Compare the thickness changes in the first week and during the long cycle, to assess the irreversible volume expansion caused by the SEI film and side reactions.
- 📈 Phase Transition Feature Extraction: Determine the phase transition stages of the material at different SOC levels by analyzing the slope changes of the expansion curve.
- 🛠 Mechanical Modulus Assessment: Test the mechanical modulus of the battery under various charging and discharging states to provide data support for mechanical simulation.
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1. Why is "in-situ" testing more important than "ex-situ" testing in the research and development of silicon anode batteries?The off-site test can only observe the final results, while the in-situ test can capture in real time the pulverization points and nonlinear expansion processes of silicon particles during their lithium extraction. With the Taiantest in-situ system, researchers can accurately determine the failure points of electrolyte additives within the corresponding voltage range.
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2. How should one choose between the constant pressure mode and the constant gap mode?If you are studying the inherent physical properties of the materials, it is recommended to use the constant pressure mode; if you are verifying the module structure design or the strength of the PACK shell, the constant gap mode can more accurately simulate the expansion force and damage of the battery in a sealed space.
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3. How stable is the system? Can it support long-term cycle tests lasting for several months?By using an extremely low temperature drift displacement sensor combined with a highly rigid frame, the measurement errors caused by thermal expansion and contraction of the equipment as well as mechanical fatigue can be effectively eliminated. The system supports 24/7 uninterrupted operation and has a power outage data protection function.
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4. What types of batteries are compatible with this in-situ expansion analysis system?The system is compatible with a wide range of battery types including pouch cells, prismatic cells, and cylindrical cells. It is particularly well-suited for silicon-based anode batteries and solid-state batteries, supporting cell sizes that fit within the W300×D400mm compression plate area.
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5. What safety measures are in place to protect researchers during high-pressure or thermal runaway events?The test chamber is equipped with a pressure relief port (≥ W200×H200mm) on the left side that automatically opens when the battery explosion shock wave pressure reaches ≥ 0.104MPa. Additionally, a test hole on the right side is fitted with a silicone plug and a safety chain to prevent ejection, ensuring operator safety during abnormal events.
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6. Can the system simultaneously record electrochemical and mechanical data in a single test?Yes. The integrated analysis software synchronously collects six-dimensional data including voltage, current, capacity, thickness, pressure, and temperature in real time. This enables researchers to directly correlate electrochemical behavior with mechanical responses, generating professional charts such as expansion force-SOC and dQ/dV curves automatically.