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China Suppliers Factory In-situ Expansion Testing Machine for Lithium-Ion Battery Research and Development
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China Suppliers Factory In-situ Expansion Testing Machine for Lithium-Ion Battery Research and Development

The in-situ expansion testing machine, also referred to as the in-situ expansion analysis system, is an essential piece of equipment for new energy battery research and development. This innovative machine is designed to monitor the thickness expansion and expansion force variations of lithium-ion batteries in real-time and without causing any damage during the charging and discharging cycles. As a leading provider in this field, our China-based factory ensures that we offer high-quality solutions tailored to the needs of battery suppliers and manufacturers worldwide. Trust our in-situ expansion testing machine to enhance your battery research capabilities and achieve optimal performance
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    Product Detail

    Technical Specifications

    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 x D600 x H600 mm

    2. Compression plate: W300*D400mm

    3. Temperature control range of the test chamber: -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 layer insulation material: Rock wool (flame retardant; high temperature resistant)

    10. Inner box material: SUS304 stainless steel t=2.0mm

    11. Pressure relief port: There is a pressure relief port on the left side of the equipment. Size: ≥ W200*H200mm. The pressure of the battery explosion shock wave ≥ 0.104MPa will automatically open.

    12. Test hole: The hole on the right side has a diameter of Ø100mm, equipped with a silicone plug. It can be opened when the battery explodes and can also be used as a pressure relief port. It is equipped with a chain to prevent it from flying out and injuring people.

    Displacement Thickness Sensor

    1: The servo motor comes with an encoder that can detect displacement and thickness.

    2: An external micron-level displacement sensor is used to detect displacement and thickness.

    Test trip

    0～90mm

    Thickness measurement resolution

    0.001mm
    Technological Excellence
    A Two Core Testing Modes
    • 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.
    B Ultra-high Measurement Accuracy
    • The displacement resolution reaches 0.1μm, accurately capturing minute phase change expansion.
    • High-precision pressure sensor ensures real-time accuracy of mechanical data.
    C Integrated Analysis Software
    • 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.
    Applications
    Development of silicon-based anode
    Research and development of solid-state batteries
    Optimization of BMS strategy
    Evaluation of battery cell structure
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    Scientific Data Insights
    1
    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.
    2
    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.
    3
    Mechanical modulus assessment: Test the mechanical modulus of the battery under various charging and discharging states to provide data support for mechanical simulation.
    FAQ
    Q 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.
    Q 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.
    Q 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.
    Q What types of battery cells are compatible with this in-situ expansion analysis system?
    The system is compatible with a wide range of battery cell formats, including pouch cells, prismatic cells, and cylindrical cells. The compression plate dimensions (W300×D400mm) and the adjustable pressure range (10kg–1000kg) allow flexible configuration for different cell sizes and chemistries.
    Q Can the system simultaneously collect electrochemical and mechanical data?
    Yes. The integrated analysis software synchronously collects six-dimensional data streams — including voltage, current, capacity, thickness, pressure, and temperature — in real time. This enables direct correlation between electrochemical behavior and mechanical expansion characteristics throughout the full charge/discharge cycle.
    Q What safety features are included in the test chamber design?
    The test chamber incorporates multiple safety mechanisms: an automatic pressure relief port (≥W200×H200mm) on the left side that opens when the battery explosion shock wave pressure exceeds 0.104MPa, and a Ø100mm test hole on the right side fitted with a silicone plug and a chain restraint to prevent ejection during battery failure events. The insulation layer uses flame-retardant, high-temperature-resistant rock wool material.

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